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1. Capable of rough machining and precision machining The ER tool holder has high accuracy and stability, which can be used for both rough machining and precision machining. In rough machining, the ER tool handle can withstand large cutting forces to ensure the stability of the tool; In precision machining, the high precision of ER tool holders can ensure machining accuracy and improve product quality. 2. Capable of milling, drilling, tapping, and chamfering ER tool holders are widely used in various machining processes such as milling, drilling, tapping, and chamfering. This means that users only need to purchase ER tool holders to complete various processing tasks, without the need to purchase multiple tool holders, greatly reducing their procurement costs. 3. Wide clamping range, simple operation, and low cost The ER tool handle has a wide clamping range and can hold tools of different diameters, with strong adaptability. At the same time, the operation of the ER tool holder is simple, and users can complete tool replacement without the need for complex operations, improving work efficiency. In addition, the cost of ER tool holders is relatively low, allowing users to save a lot of costs during the purchase and use process. Tool Holder,Bt Tool Holder,Bt Collet Chuck,Tool Holders For Cnc Machines Overall, ER tool holders have the advantages of high precision, wide application, large clamping range, simple operation, and low cost,

ER tool holder is a commonly used tool holder on CNC machine tools, and its clamping method and precautions are of great significance for the machining efficiency and quality of the tool.Tool Holder,Bt Tool Holder,Bt Collet Chuck,Tool Holders For Cnc Machines 1. Choose the appropriate handle size Before clamping the ER tool handle, first ensure that the selected tool handle size matches the tool size. An excessively large tool handle can cause unstable shaking of the tool during operation, affecting cutting quality; A tool handle that is too small can affect cutting rigidity and stability, thereby affecting machining efficiency. 2. Cleaning tool handle Before clamping the ER handle, it should be cleaned thoroughly. Especially at the interface of the tool handle, to ensure that the contact surface between the tool handle and the tool is clean and dust-free. 3. Correct installation of tools When installing the tool, it is necessary to ensure that the clamping surface of the tool and the contact surface of the tool handle are smooth and undamaged, and pay attention to the installation sequence. In the installation sequence, install the tool handle first and then the blade; When unloading, the blade is removed first and then the handle.

Long term unused: If the CNC tool handle is not used for a long time, it is easy to accumulate dust and moisture on the surface, leading to rust. Wet storage environment: If the CNC tool handle is stored in a damp environment, it is easy to get damp and rust. Material issue: If the material of the CNC tool handle is not corrosion-resistant or the surface treatment is improper, it is easy to rust. Processing fluid problem: If the processing fluid contains corrosive substances, it is easy to cause damage to the surface of the CNC tool handle, leading to rust. To avoid rusting of the CNC tool handle, it is recommended to clean and rust treat the CNC tool handle before use, and choose a dry and ventilated environment for storage. At the same time, regular maintenance and upkeep of CNC tool holders, timely cleaning and rust removal, can extend the service life of CNC tool holders.

Spring collets play a fixed role in the use of CNC machine tools, in order to improve the processing efficiency of workshop machines. Before using the spring chuck, technicians must first ensure that the quality of the spring chuck is in a qualified state. So, how to determine whether the quality of the spring chuck is qualified? 1. Clarify the concentricity of the spring collet The rotation axis of the cutting tool must be accurately aligned with the rotation axis of the machine tool spindle. Although the method of ensuring high-precision concentricity is very clear, the manufacturing process is indeed complex and requires experienced spring clamp manufacturers and experienced technical personnel to better perform Grasp. 2. Grasp the clamping strength of the spring collet Clamping force is the ability to control the rotation of the tool in the chuck. The use of a jacket is the main cause of changes in clamping force. The single angle jacket can apply greater clamping force and ensure excellent concentricity. To ensure that the components composed of collets, jackets, and cutting tools are as good as possible The concentricity of must be measured using specialized measuring tools or high-precision tool presetters. 4. Balance detection of spring collet The imbalance of tool chucks usually comes from functional designs, such as the locking screws in end milling chucks or the varying depths of transmission grooves in CAT chucks. However, due to many reasons, the generation of imbalanced quantities is often random. Regardless of where the imbalance originates, it is necessary to remove one Some materials are used to eliminate imbalance and play a corrective role. Another solution is to use adjustable balanced tool chucks, which users can eliminate imbalance by adjusting radial screws or balancing rings. In this case, it is necessary to determine the position and size of the tool collet imbalance, which requires the use of complex balance detectors.

The basic properties that cutting tool materials should possess include high hardness, high wear resistance, high heat resistance, sufficient strength and toughness, as well as good processability and economy. 1) During the clamping process, the determined position obtained by workpiece positioning should not be damaged; 2) The clamping force should ensure that the position of the workpiece remains unchanged during the machining process, without vibration or movement; Small clamping deformation, without damaging the surface of the workpiece; (3) Safe, reliable, convenient, and labor-saving operation; (4) The structure is simple and easy to manufacture, and its complexity and automation level should be suitable for the production program of the workpiece.

Side lock tool holder: refers to a tool with a flattened handle, usually used for quick drilling. The advantages are: high clamping and concentricity, commonly used for connecting thread milling cutters, milling cutters, drill bits, high clamping force, suitable for machining with high cutting force. But a drill bit of one size needs to be equipped with a corresponding chuck, with multiple specifications. Secondly, it may cause the drill bit to be out of alignment with the spindle, causing damage to the drill bit during processing. The biggest characteristics of the end mill holder clamping boring tool are: A. High precision B. Large clamping force C. Good rigidity D. Strong directionality The side fixed tool holder and taper handle are internationally first-class technology, which can fit well with the spindle, extend the tool service life, repeatedly clamp, and have high accuracy. The surface hardness is high, reaching 58 ° -62 °. The product has high cost-effectiveness and stable quality. The toolholder is suitable for machining processes such as precision machining, rough machining, flat machining, end face machining, slot, cut in machining, heavy cutting, etc; The shape of the handle of the side fixed tool handle varies depending on the clamping tool, and the corresponding locking screws are different. During use, the position of the side fixed screw must be confirmed. Only by aligning the flat position of the cutting tool can it be locked tightly.

As an established manufacturer of high-precision spring collets, our company mainly produces various types of spring chucks and tungsten steel guide sleeve series products, mainly including ER spring collet,high-precision spring chucks, 5C collet, CNC lathe spring chucks, and other precision hardware accessories, with accuracy ≤ 0.003MM. It is made of high-quality spring steel and provides professional pre-sale and after-sales services to our customers. There is a problem with broken knives. It is recommended that you carefully investigate it yourself first 1. See if your knife handle spring collet nut is locked tightly 2. Check to see if there are foreign matters such as iron filings inside the spring chuck that have not been cleaned up. (Unlikely) 3. Check if the cutting amount or feed speed of the tool is too large during NC programming, 4. Check to see if there are any problems with the programming program that may cause knife breakage or cutting. "Breaking the inside indicates that the front is suspended, and there is a step in the middle of the spring chuck. Replace the spring chuck.". Technical standards for spring chucks: The ISO standard provisions on radial circular runout are adopted, i.e., when d22mm is used, radial circular runout=0.03+0.01L/d); When d<2mm: the radial circular runout value is not specified. Perfect technology can provide rapid delivery, stable quality, perfect after-sales service, and support return and exchange of goods and non-standard customization.

ER spring collet is a kind of cylindrical clamp that can be installed on the milling machine to confine the drill bit or milling cutter. ER spring collet is a fixing device used to fix and reinforce parts that need to be modified. ER spring collet is an important part of all parts of the clamping mechanism. It is made under tight motion conditions and determines the processing accuracy. Therefore, it is very important to determine the basic parameters of the spring chuck (identification number, cone angle, jaw and identification length) to ensure high working capacity. Our company is a spring collet manufacturer with 16 years of professional experience in the production of NC instrument lathe collets, with a precision of 0.003MM and a service life of 600000 times. We have selected high-quality spring steel, imported Japanese technology and imported equipment, and CNC composite machining and forming, which can provide Auxiliary design of collet and peripheral accessories, one-stop procurement!

BT30 is a taper type of tool holder. MAS BT (Japanese standard) 7:24 taper universal toolholder, usually has five standards and specifications, namely NT (traditional type), DIN 69871 (German standard), IS0 7388/1 (international standard), MAS BT (Japanese standard) and ANSI/ASME (American standard). BT30 Interpretation 1.30 refers to the tool shank diameter model. 2. When BT30 is 7:24, the maximum diameter of the taper part of the tool shank is 31.75mm, and the maximum diameter of the tool shank is 46mm 3.30 is the taper, and the formula is C (taper)=(D-d)/L, where D is the diameter of the lower disc mouth of the tool handle, d is the diameter of the upper port, and L is the height of the cone table.

① For some simple tools that are used repeatedly for a long time and do not need to be assembled, it is advisable to equip them with integral tool handles to make the tools rigid and cheap (such as end mill tool handles, spring collet tool handles and drill collet tool handles for processing the outer contour of parts); ② When processing multi-variety and small-batch parts with constant changes in hole diameter and hole depth, modular tool holders should be selected to replace a large number of integral boring tool holders and reduce processing costs; ③ For many CNC machine tools, especially the spindle end of the machine tool and the tool changing manipulator are different, the modular tool handle should be selected. Because the intermediate module (extension bar) and working module (tool loading module) used by each machine tool can be used in general, the equipment investment can be greatly reduced and the work order utilization rate can be improved. In order to improve the processing efficiency, high-efficiency tools and tool holders should be selected as far as possible. For example, the handle of the double-edge boring tool can be selected for rough boring, which can improve the machining efficiency and also help to reduce the cutting vibration. The use of the powerful spring chuck can not only clamp the straight shank tool, but also through the extension bar clamp tools with holes, etc

Collet sleeve The clamping organization of the spring collet selects the spiral clamping organization to finish clamping and lock the tool handle. The nut sleeve is equipped with a gear ring, which is intended to transmit torque through the correct meshing of the gear ring and the gear in the clamping organization. In order to reduce the collision and loss of the ring gear nut sleeve when clamping the tool, a V-shaped groove is added between the outer end of the ring gear nut sleeve and the retainer ring of the spring sleeve, in which a circle of steel balls are closely arranged, thus forming the simplest structural plan of the spring collet. In order to further enhance the impact resistance of the spiral clamping structure in the cutting process (that is, the self-locking clamping function of the structure can still be maintained during the impact process), the structural form of the spring collet clamping structure can completely choose the structural form of a powerful spring collet tool handle produced in China. It is concluded that the structure of the spindle shaft end has the characteristics of simplicity, good craftsmanship and small occupation space, which is conducive to the optimization and standardized planning of the spindle of the dry machine tool according to its own requirements. Main shaft end structure The two semicircle keys placed at the bottom of the hole are used to transmit the satisfied cutting torque to the cutting edge of the tool through the tool shank. The guide cone is machined at the top of the semicircle key to facilitate the stabbing of the tool handle. The same of two semicircle keys The side (non operating side) is processed along the axial direction and fixed in the groove. The operating surface is slightly higher than the appearance of the semicircle key. Its function is to eliminate the semicircle key and the semicircle slot operation after the two semicircle keys penetrate into the semicircle slot at the end of the tool handle The surface clearance prevents the tool cylindrical shank from being scratched due to the relative sliding when the cutting torque is greater than the conflicting torque between the spring sleeve and the tool shank due to the existence of the clearance after the tool stabbing. An air jet is arranged at the center of the bottom of the main shaft hole, and the air jet is connected with the air path of the main shaft center hole. When exchanging tools, compressed air passes through the air jet and enters the spring sleeve cavity to blow away the iron filings and dirt attached to the spring sleeve and the tool handle. The cone angle 2a of the inner cone is generally 30 °. The intention of taking a larger taper angle is that the tool handle is easy to be loosened, which is convenient for tool loading and unloading. In order to ensure that there is no relative movement between the tool handle and the spring sleeve in the process of clamping the tool, that is, the tool and the spring sleeve make synchronous axial displacement together, and also ensure that the tool can maintain good axial repeated positioning accuracy after each tool change, it is necessary to ensure that the positioning end face of the tool handle and the positioning end face of the spring sleeve keep touching during the clamping process. In this plan, this action is controlled by the tool exchange position Provided by the manipulator, that is, the manipulator always supplies the tool handle with an upward elastic force that makes the positioning end face of the tool handle flange close to the end face of the spring sleeve during the clamping process. Now the centering accuracy of the elastic chuck can generally reach 0.01 mm or even higher. In a pair of screw pairs, when the equivalent collision angle f0 of the spiral rising angle small dry thread, the screw clamping organization will have a good self-locking function. For the general specification thread, the steel-steel conflict pair is selected, and its equivalent conflict angle o0=6 ° 35 ', while the spiral rise angle of this thread is 2 ° 29', that is, ≤ 00 Spring collet To improve the operation function of the machine tool spindle and satisfy the requirements for active tool change of CNC machine tools, it is necessary to plan and develop the spring collet at the spindle end of the machine tool spindle, which can well solve the following key problems: 1: There should be sufficient touch stiffness between the cylindrical tool handle and the contact surface of the spring collet in the clamping state. The contact stiffness between the spring sleeve in the spring collet and the contact surface of the taper hole at the spindle end of the machine tool should also be satisfied under the clamping state. 2: During the machining process, it is necessary for the machine tool spindle to feed the tool and transmit full cutting torque. 3: The strong-spring collet adopts the spiral clamping organization. In addition to opening the clamping knife and supplying large radial clamping force, it is also necessary to have reliable self-locking function. 4; After replacing the tool each time, the tool AC mounting and spring collet should have a high turning and positioning accuracy. 5; In the process of tool change, it has the function of actively cleaning the iron dust and slag in the tool handle and spring collet cavity. 6: The spindle end of the machine tool should have simple structure and good processability, which is convenient for the optimization planning of the spindle itself. Ring gear nut sleeve The spring sleeve is a thin-walled conical elastic element, which is the key part of the spring collet. The taper part of the spring sleeve can be provided with multiple axial grooves as required. The large diameter end of the spring sleeve is planned with a stop ring to provide axial thrust to the spring sleeve through the stop ring.

ER spring collet material: 65MnER Spring collet hardness: HRC44~48 DIN standard, JIS standard ER spring collet specification clamping range (mm): ER8:1-5, ER11:1-7, ER16:1-10, ER20:1-13 ER25:1-16.ER32:3-20.ER40:3-25 ER spring collet model: ERCOLLET: ER8A. ER11A. ER11AA. ER16A ER16AA, ER25/ER32A. FR25/FR32AA, FR40/FR50A, FR40AAOZ COLFT: O716: O725:0732ST straight shank force type COLLFT: ST20, ST25. ST32. ST42FR steel wire tapping clamp: DGB16.DGB20, DGB25, DGB32 DGB40 ER sealed collet: ER16, ER20, ER25, ER32, ER40 If you want to buy it, the model of the tool handle projectile chuck AR32-20AAA specification: AR=ER 32 is the size of the collet, and 20 is the diameter of the clamping tool handle. AAA is the precision level. Installation notes of ER spring collet: 1. Before installing the spring collet, first install the spring collet into the lock nut, and then gently install the lock nut with the spring collet Screw it on the tool handle, extension bar or spindle. 2. In order to obtain the best performance, before installing the spring collet, be sure to position the threaded part of the spring collet and lock nut Clean the face and cone.

The taper hole of the main shaft in the center is generally divided into two categories, namely the general system with a taper of 7:24 and the HSK straight-air system with a taper of 1:10. 1. There are generally five standards and specifications for the universal tool shank with a taper of 7:24: NT (Traditional) (NT or ST for short) DIN 69871 (German Standard) (J, DIN, DAT or DVY for short IS0 7388/1 (international standard) (IV or IT for short) MAS BT (Japanese Standard) (BT for short) ANSI/ASME (American Standard) (CAT for short) The German standard of NT type tool handle is DIN 2080, which is used to tighten the tool handle on traditional machine tools through pull rods, also known as ST in China. The other four kinds of tool handles are tightened on the machining center by the pull pin at the end of the tool handle. At present, DIN is the most widely used in China 69871 (i.e. JT) and MAS BT handle. The tool handle of DIN 69871 can be installed on the machine tool of DIN 69871 and ANSI/ASME spindle taper hole, and the tool handle of IS0 7388/1 can be installed on the machine tool of DIN 69871, ISO 7388/1 and ANSI/ASME spindle taper hole, so it is universal.The handle of ISO 7388/1 is the best. 2. 1:10 HSK vacuum knife handle: The German standard of HSK vacuum tool handle is DIN69873. There are six standards and specifications, namely HSK-A, HSK-B, HSK-C, HSK-D, HSK-F and HSK-F. There are three commonly used ones: HSK-A (automatic tool change with internal cooling), HSK-C (manual tool change with internal cooling) and HSK-E (automatic tool change with internal cooling, high-speed type). The 7:24 universal tool handle is 7% of the 7:24 conical surface of the tool handle and the spindle hole of the machine tool; 24 Conical contact positioning connection has limitations in high-speed machining, connection rigidity and coincidence accuracy. HSK vacuum tool handle is subject to elastic deformation of the tool handle, which not only contacts the 1:10 conical surface of the tool handle with the 1:10 conical surface of the machine tool spindle hole, but also makes the flange surface of the tool handle closely contact with the spindle surface. This double-sided contact system is superior to the 7:24 universal tool handle in high-speed machining, connection rigidity and coincidence accuracy.

Before installing the cone on the main shaft bearing, clean the collet cone and the lathe main shaft, and tap the inner hole with a vulcanized rubber hammer or mallet to ensure confidentiality and indivisibility, firm or tight with an extension rod. According to the production and processing, it is necessary to select the relative sleeve specification for cleaning, put it into the internal thread of the behavior body, gently push the sliding cap of the behavior body, make the sleeve specification octagonal into the body square hole, and then clamp the relative numerical control blade on the sleeve specification to complete the clamping, then the production and processing application can be carried out. If tapping is used, remember to loosen the screw cap first, and tighten the screw cap according to the different torque size of the tap during production, so that the tap does not drag. When the tap is put into the tap sleeve specification, pay attention to inserting the octagonal handle into the square hole in the elastic chuck to Raise the torque. Slightly push the sliding cap to remove the sleeve specification (or replace it). After the application, clean the anti-rust treatment, behavior body and elastic collet. Please note that when the collet of ER collet has no working attitude, it is strictly prohibited to loosen the locknut and tighten it on the collet and the spindle bearing of the extension rod when the collet is not equipped with a CNC blade to prevent collet deformation and ductile fracture. Our company has nearly 16 years of experience in the production of high-precision ER spring collets. The process is perfect and can be used for rapid delivery. The quality is stable. All products are tested 100% before leaving the factory. Conventional collet fixtures and hardware cutting accessories basically have stock rough parts or stock finished products, with service life Up to 600000 times, with the accuracy of 0.003mm, non-standard extension can be carried out, and special-shaped collets can be customized according to the drawing.

ER spring collet material: 65MnER Hardness of projectile chuck: HRC44~48 DIN standard, JS standard ER spring collet specification clamping range (mm): ER8:1-5, ER11:1-7, ER16:1-10, ER20:1-13 ER25:1-16.ER32:3-20.ER40:3-25 ER spring collet model: ERCOLLET: ER8A. ER11A. ER11AA, ER16A, ER16AA ER25/ER32A. ER25/ER32AA, ER40/ER50A, ER40AA OZ COLLET: OZ16, OZ25, OZ32 ST straight shank force type COLLET: ST20, ST25, ST32, ST42 ER steel wire tapping clamp: DGB16, DGB20, DGB25, DGB32,DGB40 ER water stop clamp: ER16, ER20, ER25, ER32, ER40 If you want to purchase it, the tool handle spring collet model AR32-20AAA specification: AR=ER 32 is the size of the collet, and 20 is the clamping tool handle Diameter of. AAA is the precision level.

CNC instrument lathes generally use spring chucks to clamp workpieces. Before making tool allocation plans for products, most manufacturers will give us the tools to process The product drawing of the workpiece, but how to prepare the tool matching scheme after we get the drawing, is a very technical job. Welcome to learn and communicate with us. See clearly the requirements of the drawing and the process, and then select the cutter from the surface to the point. Pay special attention to: 1. Pay attention to groove cutting and profiling during excircle machining, and avoid the contact between the rear tool back and the workpiece. The most important consideration in turning is contact To solve the problems of all surfaces and chip removal, it is necessary to avoid the machined surface and tool tip to complete the cutting route. 2. In the milling process, more attention should be paid to the profiling and processing accuracy, as well as some special requirements in the processing. When there are multiple and tool options, two aspects can be considered. 1. Considering the existing inventory, reducing inventory is the first choice. 2. From the perspective of tool cost, low cost will give priority to customers. It is not ruled out that customers give priority to quality, and put quality first noodles. In terms of tool allocation, you must know which ones are more expensive and which ones are wear resistant and can be ordered at one time? For customers, the price is mainly considered. For those who are durable and one-time orders, the price is preferred. Customers can choose better ones as long as they consider the processing quality, such as original imported cutter bars.

The manufacturing material of ER collet is spring steel, which has excellent comprehensive properties, such as mechanical properties (especially elastic limit, strength limit, yield ratio), anti elastic decrement performance (i.e. anti elastic decrement performance, also known as anti relaxation performance), fatigue performance, hardenability, physical and chemical properties (heat resistance, low temperature resistance, oxidation resistance, corrosion resistance, etc.). It can be seen from the above that the production type is medium batch production, so die forgings are used for gross damage. The selection of the base surface of ER collet is one of the important tasks in the design of process specification. The correct and reasonable selection of the base plane can ensure the processing quality Ensure that the productivity is improved. Otherwise, not only are there many problems in the processing process, but also a large number of parts will be scrapped, making production impossible.

The clamping structure of spring collet is mainly used in metal cutting machine tools, especially in bar automata. However, individual parts of them are often damaged, and the probability of the automaton striking caused by the dry clamping organization is often high. Therefore, among all parts of the clamping organization, the spring collet is the most important machine tool accessory. It works under severe motion conditions and determines the accuracy of. Therefore, it is very important to determine the basic parameters of the spring chuck (number of flaps, cone angle, jaw and flap length) for the working capacity of the stem. In practical applications, if the dimensions of the workpiece are relatively common, the processing speed of using the chuck will be faster. If the size of the workpiece changes greatly, the jaw chuck may be more appropriate. If the processed materials are hot rolled steel, forgings and molded parts, the standard jaw chuck is often more applicable, because the parts of such materials are prone to large scale changes due to thermal deformation. The cold roll material parts have better scale commonality, so it is suitable to select tension spring chuck for clamping. In addition, the parts of non-circular blanks can also be clamped with spring collets, which can provide the collets with dry non-circular cross section for design, and are used to clamp the molded bars made into the shape required by customers.

1. Finish turning the conical surface of the collet. Use the threaded tire to ensure the turning accuracy of the collet body. After finishing finishing the finish turning of all surfaces and drilling the equal dividing holes, turn the conical surface. When turning the conical surface, take the threaded surface as the positioning reference. We design a cap pattern tire, which can ensure the turning accuracy when turning the conical surface. The processing principle is as shown in the following figure. First screw the head onto the ear pattern tire, and then install the cap pattern tire onto the machine tool spindle, Finally, use the small tool holder on the supporting plate to cut the spring collet. 2. Milling into equal parts: when milling the groove on the trimming chuck, first use the end mill iron 20mm x 40mm to divide the groove into six equal parts, and then use the iron chip cutter to mill the 3mm wide six equal parts empty groove for the split, but this groove cannot be iron connected, and the end face is left with 3~4mm connecting bars, so that the chuck body is still integral, so as to ensure that the incoming end will not be deformed after thermal processing, and the processing accuracy of each positioning surface of the grinding incoming end should be aligned and thermal processing should be conducted after the above processing, but the external processing parts should be reasonable, The collet head shall be quenched,? Its hardness is about 40~45HRC, and the middle part of the chuck is not quenched to ensure the elasticity of the chuck. 3. Grinding the collet cone surface: when grinding the collet cone surface, the thread tire is also used to ensure the grinding accuracy. The conical surface is an important locating surface in the clamping process of the collet. The accuracy of the conical surface is good or bad. The accuracy of the whole chuck is directly affected. A set of grinding and screwing clamping chuck is designed. The positioning datum is still the thread surface. The coaxiality of the grinded cone surface with respect to the dry thread surface can reach 0.1mm 4 Inner diameter of spring collet: the grinding inner diameter tire is used to ensure the accuracy of grinding plus T. The inner diameter of the collet is also a positioning surface, which is used to hold the clamp block for the inner diameter of the head, and then the clamp block is used to tighten the workpiece. Therefore, the accuracy of the inner diameter also directly affects the accuracy of the workpiece to be processed, which requires that the inner diameter and the conical surface must be coaxial. We design a special grinding inner diameter tire and clamping chuck, which is positioned with a conical surface. After grinding, the coaxiality of the inner diameter of the chuck with respect to the thousand cone surface can generally reach 0.02mm 5. Spring collet guide surface: similarly, thread tire is used to ensure grinding accuracy. The guide surface plays a guiding role in the collet, and the guide surface and cone surface must be coaxial. It is still clamped with the thread tyre used for grinding the cone surface.

Fixture is six points (3+2+1: three points for surface fixing, two points for line setting and one point for fixing), and machining needs to solve deformation and runout. Is the handle of the tool too long? Is the tool holder rigid enough? Is the speed and feed rate appropriate? A series of problems will cause the spring collet to jump greatly. During high-speed cutting, because of the large machining allowance and intermittent cutting, the milling process often produces vibration, which affects the machining accuracy and surface rough accuracy. Therefore, the NC high-speed cutting process can generally be divided into: rough machining - semi finishing - corner cleaning - finishing and other processes. For parts with high dry precision requirements, it is sometimes necessary to conduct secondary semi finishing, and then finish machining. After rough machining, the parts can be naturally cooled to eliminate the internal stress generated by rough machining and reduce deformation. The allowance left after rough machining shall be greater than the deformation, generally 1-2 mm. During finish machining, the finish machined surface of the part shall maintain a uniform machining allowance, generally 0.2~0.5mm, so that the tool is in a stable state during the machining process, which can greatly reduce the cutting deformation, obtain good surface processing quality and ensure the accuracy of the product. The main reason for the tool radial runout during machining is that the radial runout is aggravated in radial cutting. Therefore, reducing radial cutting force is an important principle to reduce radial runout. The following methods are used to reduce radial runout: 1. Use a sharp knife 2. The front face of the tool should be smooth 3. The cleanliness of the chuck shall be good 4. The selection of cutting quantity shall be reasonable 5. Reasonable selection of cutting fluid