Machining and positioning device and machining method for plug-in type retainer

Abstract

The invention discloses a machining device and a machining method of a plug-in retainer. A machining positioning device comprises a mandrel, a lower die and an upper die, wherein the lower die and the upper die are arranged on the mandrel; the lower die is provided with an outer circumferential surface for supporting the inner circumferential surface of the semi-finished retainer and a first abutting plane for supporting the non-notch side end surface of the semi-finished retainer, the outer circumferential surface is perpendicular to the first abutting plane, and pocket avoiding grooves in one-to-one correspondence with the positions, where pockets need to be machined, of the semi-finished retainer are formed in the outer circumferential surface in the circumferential direction of the outer circumferential surface; the upper die is provided with an axial extending part which is located on the outer side of the outer circumferential face and is in sliding fit with the outer circumferential face, and the end of the axial extending part is provided with a second abutting plane which is parallel and opposite to the first abutting plane and used for pressing the end face of the notch side of the semi-finished retainer. The retainer is installed in a machining center through the machining device, pocket hole drilling and milling and notch milling are completed in the same step, the precision of the notch is improved in the machining process in cooperation with a machining method, and the quality of a finished retainer product is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of bearing retainer processing, and in particular to a processing positioning device and a processing method for an inserted retainer. Background Art

[0002] Deep groove ball bearings have a small friction coefficient, high limit speed, and a variety of sizes and forms. They are used in precision instruments, low-noise motors, automobiles, motorcycles, and general machinery. They are the most widely used type of bearings in the machinery industry. They mainly bear radial loads and can also bear a certain amount of axial loads. A deep groove ball bearing with a ball-loading notch has a non-metallic cage, such as Figure 1 and Figure 2 As shown, pockets 801 are distributed circumferentially, and a notch 802 connected to the pockets 801 is provided on one end face of the cage. Rolling bodies are loaded through the notch to guide and drive the rolling bodies to roll on the raceway and prevent the rolling bodies from colliding and rubbing against each other when the bearing rotates. This type of cage is also called an inserted cage.

[0003] Deep groove ball bearings with insert cages are generally used in aviation, aerospace, weapons, ships and other fields. The original mature process for processing insert cages is: turning one end face, chamfering → turning the other end face, chamfering, cutting → stabilization treatment → flattening both end faces and chamfering → rough turning the outer diameter, chamfering → rough turning the inner diameter, chamfering → drilling and milling pocket holes → stabilization treatment → fine turning the inner diameter, chamfering the inner angle → fine turning the outer diameter, chamfering the outer angle → milling notches → removing burrs → final inspection → packaging. The process for processing insert cages is to fine turn the inner and outer diameters after drilling and milling pocket holes to ensure that the deformation of the cage caused by the processing stress caused by the previous processing steps can be eliminated after fine turning the inner and outer diameters. This processing method performs notch processing after fine turning the inner and outer diameters. The notch is processed by a motor-driven saw blade milling cutter. The processed notch will have problems such as collapse, flare and symmetrical skewness. Summary of the invention

[0004] The purpose of the present invention is to provide a processing positioning device and processing method for an inserted retainer, wherein the processing positioning device installs the retainer on the processing equipment, and the drilling and milling of pocket holes and the milling of notches are completed in the same step, and the processing method is used to improve the accuracy of the notches during the processing to ensure the quality of the finished retainer.

[0005] The technical solution adopted by the present invention is: a processing and positioning device for an insert-type retainer, comprising a mandrel and a lower die and an upper die arranged on the mandrel; The lower mold has an outer circumferential surface supporting the inner circumferential surface of the semi-finished retainer and a first abutting plane supporting the non-notch side end surface of the semi-finished retainer, the outer circumferential surface is perpendicular to the first abutting plane, and pocket hole avoidance grooves corresponding to the positions of the pocket holes to be processed on the semi-finished retainer are arranged along the circumferential direction of the outer circumferential surface; The upper die has an axial extension portion located outside the outer circumferential surface and slidably matched therewith, the end of the axial extension portion has a second abutment plane parallel to and opposite to the first abutment plane and used to press the notch side end face of the semi-finished retainer, and the axial extension portion is provided with a notch avoidance groove that penetrates the inner and outer sides of the axial extension portion and is connected to the second abutment plane along the circumferential direction of the upper die, and the notch avoidance groove can overlap with the pocket avoidance groove accordingly; The end of the mandrel is provided with a locking mechanism for applying a clamping force to the lower die and the upper die.

[0006] As a preferred solution, the outer diameter of the axially extending portion is greater than the outer diameter of the semi-finished retainer.

[0007] As a preferred solution, the pocket avoidance groove is an oblong hole, and its length direction is along the axial direction of the lower die; The notch avoidance groove is a semi-long circular hole, and the widths of the long circular hole and the semi-long circular hole are equal.

[0008] As a preferred solution, the lower mold and the upper mold are made of bakelite material.

[0009] As a preferred solution, the length of the pocket avoidance groove is greater than the sum of the lengths of the connected pockets and notches, and the width of the pocket avoidance groove is greater than the width of the pockets.

[0010] As a preferred solution, when the outer circumferential surface and the axially extending portion are slidably matched in the axial direction, the notch avoidance groove and the pocket avoidance groove overlap.

[0011] As a preferred solution, the locking mechanism includes a base, a gland and a nut; A through groove is provided in the middle of the lower die and the upper die along the axial direction for the end of the core shaft to pass through, a support is provided on the side of the core shaft to limit the axial movement of the lower die, a pressure cover is provided on the upper side of the upper die, and a nut is threadedly connected to the end of the core shaft. The nut cooperates with the support to keep the lower die and the upper die between the two closed.

[0012] A method for processing an insert type retainer comprises the following steps: Install the semi-finished retainer after fine turning of the inner and outer diameters and chamfering of the inner and outer corners into the processing positioning device according to any one of claims 1 to 7, fix the processing positioning device to the drilling and milling processing equipment, and then perform processing according to the following steps: Drilling pocket holes: Taking the inner circle of the semi-finished cage as the reference surface, use the alloy drill bit of the processing equipment to drill holes at the positions where the pocket holes are to be set on the semi-finished cage. The holes to be drilled are opposite to the pocket hole avoidance grooves. During processing, the spindle speed of the processing equipment is 1500-1800mm / min, and the feed rate is 0.1-0.15mm / r, leaving a processing allowance of 0.1-0.15mm for subsequent milling holes; Milling pocket holes: Replace the drill bit of the processing equipment with a milling cutter, and use the milling cutter to mill off the pocket hole margin to meet the pocket hole size and accuracy requirements of the finished solid cage. During processing, the spindle speed is 2000-2500mm / min, and the feed rate is 0.03-0.05mm / r; Milling notch: Take the non-notch side end face of the semi-finished cage as the reference plane, and the milling cutter processes from the reference plane to the other end face in the pocket hole. After the end face of the semi-finished cage is milled through, it is reciprocated back to the pocket hole. During processing, the spindle speed is 2200-2500mm / min, and the feed rate is 0.03-0.05mm / r; After the processing is completed, the semi-finished retainer is taken out from the processing positioning device, burrs are removed, and the finished retainer is obtained.

[0013] As a preferred solution, the steps of installing the semi-finished retainer to the processing positioning device are as follows: First install the lower die on the mandrel; Then, the semi-finished retainer is placed on the lower die, so that the semi-finished retainer is sleeved outside the outer circumferential surface of the lower die, the inner circumferential surface of the semi-finished retainer is supported by the outer circumferential surface, and the first abutting plane abuts against the non-notch side end surface of the semi-finished retainer; Then, the upper die and the lower die are closed, so that the axial extension portion of the upper die is sleeved on the outer circumferential surface of the lower die, and the second abutting plane of the upper die abuts against the notch side end surface of the retainer semi-finished product; Adjust the pocket avoidance groove and the notch avoidance groove to one-to-one correspondence; Finally, the lower die and the upper die are clamped by a locking mechanism and kept closed.

[0014] As a preferred solution, the spindle speed when milling the notch is greater than the spindle speed when milling the pocket hole, and the feed rate when milling the notch is less than the feed rate when milling the pocket hole.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The processing positioning device realizes the clamping and positioning of the cage, which is safe and stable and does not interfere with the drill bit and milling cutter.

[0016] 2. After the retainer is positioned once, the processes of drilling and milling pocket holes and milling notches are carried out on the same processing positioning device without repositioning, so the position of the notch relative to the pocket hole does not shift.

[0017] 3. The upper and lower dies are made of bakelite to reduce scratches on the contact surface of the cage and improve the processing quality of the cage.

[0018] 4. In the processing method, the drilling and milling of pocket holes and the milling of notches are processed on the same processing positioning device of the same drilling and milling processing equipment, and repeated positioning is not required. At the same time, the machine tool accuracy of the drilling and milling processing equipment is higher than that of the milling machine. The milling cutter used for processing on the drilling and milling processing equipment (machining center) has better processing accuracy for notches than the saw blade milling cutter used on the milling machine, which can avoid notch collapse and flare, and ensure notch processing accuracy and surface quality.

[0019] 5. In the processing method, reasonably control the spindle speed and feed rate to prevent the notch from skewing and ensure the integrity and consistency of the notch. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of the shaft section of the finished cage; Figure 2 is a schematic cross-sectional view of the finished retainer; Figure 3 It is a cross-sectional schematic diagram of the processing positioning device of the present invention; Figure 4 It is a schematic diagram of the lower mold of the present invention; Figure 5 It is a schematic diagram of the upper mold of the present invention.

[0022] Reference numerals: 1. Mandrel; 2. Lower mold; 201, outer circumferential surface, 202, first abutting plane, 203, pocket avoidance groove; 3. Upper mold; 301, axial extension portion, 302, second abutment plane, 303, notch avoidance groove; 4. Cage semi-finished products; 5. Platform; 6. Gland; 7. Nut; 8. Finished cage, 801, pocket, 802, notch. DETAILED DESCRIPTION

[0023] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that, without further description, elements, structures and features in one embodiment may also be beneficially combined in other embodiments.

[0024] It should be noted that: unless otherwise defined, the technical terms or scientific terms used in this document shall have the usual meanings understood by people with ordinary skills in the field to which the invention belongs. The words "one", "an" or "the" and the like used in the patent application specification and claims of the present invention do not express quantity restrictions, but indicate the existence of at least one; the words "first", "second" and "third" used in this document shall not be regarded as restrictions on the order of components, but are only used to distinguish different components; words such as "include" or "comprise" and the like indicate that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, but do not exclude other elements or objects with the same function.

[0025] In order to more clearly describe the processing positioning device and processing method of the insert type retainer, Figure 1-5 Describe this embodiment: like Figure 3 , Figure 4 and Figure 5 As shown, a processing and positioning device for an insert-type retainer comprises a mandrel 1 and a lower die 2 and an upper die 3 arranged on the mandrel 1; The lower die 2 has an outer circumferential surface 201 supporting the inner circumferential surface of the retainer semi-finished product 4 and a first abutting plane 202 supporting the non-notch side end surface of the retainer semi-finished product 4. The outer circumferential surface 201 is perpendicular to the first abutting plane 202. The outer circumferential surface 201 is provided with pocket hole avoidance grooves 203 corresponding to the positions of the pocket holes to be processed in the retainer semi-finished product 4 along its circumferential direction, so as to not affect the processing of the pocket holes by the drill and the milling cutter while keeping the retainer semi-finished product 4 positioned. The upper die 3 has an axial extension portion 301 located outside the outer circumferential surface 201 and slidably matched therewith, and the end of the axial extension portion 301 has a second abutment plane 302 which is parallel to and opposite to the first abutment plane 202 and is used to press the end face of the notch side of the retainer semi-finished product 4, and the axial extension portion 301 is provided with a notch avoidance groove 303 which penetrates the inner and outer sides of the axial extension portion 301 and is connected to the second abutment plane 302 along the circumferential direction of the upper die 3, so as to not affect the processing of the notch by the milling cutter while keeping the retainer semi-finished product 4 positioned, and avoid damage to the notch by the milling cutter, and the notch avoidance groove 303 can overlap with the pocket hole avoidance groove 203 to ensure continuity when the milling cutter mills the pocket hole and the notch; A locking mechanism for applying a clamping force to the lower die 2 and the upper die 3 is provided at the end of the core shaft 1 .

[0026] The processing positioning device realizes the clamping positioning of the semi-finished cage 4 (cage without pocket holes and notches), which is safe and stable. The notch avoidance groove 303 is provided to be compatible with the pocket avoidance groove 203, so as not to interfere with the drill and the milling cutter during the processing. After the semi-finished cage is positioned once, the pocket holes and notches are drilled and milled on the same processing positioning device without repositioning, which is conducive to ensuring that the notch of the finished cage 8 (cage with pocket holes and notches) is not offset relative to the pocket holes.

[0027] In the above embodiment, the outer diameter of the axial extension portion 301 is larger than the outer diameter of the retainer semi-finished product 4 to ensure that the retainer notch is twisted and deformed inwards when the milling cutter mills the retainer end face during milling.

[0028] In the above embodiment, the pocket avoidance groove 203 is an oblong hole, and its length direction is along the axial direction of the lower mold 2. The notch avoidance groove 303 is a semi-oblong hole (half of the oblong hole in its length direction), and the widths of the oblong hole and the semi-oblong hole are equal. When the outer circumferential surface 201 and the axial extension portion 301 are axially slidably matched, the notch avoidance groove 303 overlaps with the pocket avoidance groove 203. When overlapping, the notch avoidance groove 303 and the pocket avoidance groove 203 form a continuous avoidance groove, ensuring that the milling cutter remains continuous when milling pockets and notches.

[0029] In the above embodiment, the length of the pocket avoidance groove 203 is greater than the sum of the lengths of the connected pockets and notches, the width of the pocket avoidance groove 203 is greater than the width of the pockets, and the width of the notch avoidance groove 303 is greater than the width of the notch. That is to say, when designing the avoidance groove, its size is adjusted larger than that of the pockets and notches to avoid interference with the milling cutter path.

[0030] In the above embodiment, the lower mold 2 and the upper mold 3 are made of bakelite. The purpose of using bakelite for the upper mold 3 is to prevent circular marks from being caused on the end face of the semi-finished retainer 4 when the end face is pressed. The purpose of using bakelite for the lower mold 2 is to prevent the inner diameter surface of the retainer from being scratched when the inner circle of the semi-finished retainer 4 contacts the lower mold, which has a good effect on improving the quality of the inner circle surface of the retainer.

[0031] In the above embodiment, the specific locking mechanism includes a base 5, a pressure cover 6 and a nut 7; a through groove is provided in the middle of the lower mold 2 and the upper mold 3 along the axial direction for the end of the core shaft 1 to pass through, and a base 5 is provided on the side of the core shaft 1 to limit the axial movement of the lower mold 2, and a pressure cover 6 is provided on the upper side of the upper mold 3. The end of the core shaft 1 is threadedly connected with a nut 7, and the nut 7 cooperates with the base 5 to keep the lower mold 2 and the upper mold 3 between the two closed.

[0032] A processing method for an insert-type retainer, the overall process steps are: turning one end face, chamfering → turning the other end face, chamfering, cutting → stabilization treatment → flattening both end faces and chamfering → rough turning the outer diameter, chamfering → rough turning the inner diameter, chamfering → stabilization treatment → fine turning the inner diameter, chamfering the inner angle → fine turning the outer diameter, chamfering the outer angle → drilling pocket holes and milling notches → deburring → final inspection → packaging. The process route of the insert-type solid retainer processing method of the present invention is different from the current processing route in that the current processing process is to mill the notches after fine turning the inner and outer diameters, and the notches are processed on a milling machine with a saw blade milling cutter, while the direct insertion retainer processing method of the present invention is to process the two steps of drilling and milling pocket holes and milling the lock ball mouth simultaneously on a drilling and milling processing equipment (machining center).

[0033] After finishing the inner and outer diameters and chamfering the inner and outer corners, install the semi-finished retainer 4 into the above-mentioned processing positioning device. After fixing the processing positioning device to the drilling and milling processing equipment, perform processing according to the following steps: ① Install the semi-finished product 4 of the cage into the processing positioning device, the steps are as follows: First, install the lower mold 2 on the core shaft 1; then place the retainer semi-finished product 4 on the lower mold 2, so that the retainer semi-finished product 4 is sleeved on the outside of the outer circumferential surface 201 of the lower mold 2, and the inner circumferential surface of the retainer semi-finished product 4 is supported by the outer circumferential surface 201, and the first abutment plane 202 abuts against the non-notch side end surface of the retainer semi-finished product 4; then close the upper mold 3 and the lower mold 2, so that the axial extension part 301 of the upper mold 3 is sleeved on the outer circumferential surface 201 of the lower mold 2, and the second abutment plane 302 of the upper mold 3 abuts against the notch side end surface of the retainer semi-finished product 4; adjust the pocket avoidance groove 203 and the notch avoidance groove 303 to a one-to-one correspondence; finally, clamp the lower mold 2 and the upper mold 3 by the locking mechanism, and keep the two closed.

[0034] ② Drilling pocket holes: Taking the inner circle of the semi-finished retainer 4 as the reference plane, use the alloy drill bit of the processing equipment to drill pocket holes in the pocket hole avoidance groove 203. During processing, the spindle speed is 1500-1800mm / min, the feed rate is 0.1-0.15mm / r, and a processing allowance of 0.1-0.15mm is reserved for subsequent milling holes. The pocket holes are drilled and milled with the inner circle as the reference. The inner circle is supported by the outer circumferential surface 201 of the bakelite material and will not be deformed.

[0035] ③ Milling pocket holes: Replace the drill bit of the processing equipment with a milling cutter, and use the milling cutter to mill off the pocket hole margin to meet the pocket hole size and accuracy requirements of the finished solid cage. During processing, the spindle speed is 2000-2500mm / min, and the feed rate is 0.03-0.05mm / r; ④ Milling notch: Take the non-notch side end face of the semi-finished cage 4 as the reference plane, and the milling cutter processes from the reference plane to the other end face in the pocket hole. After milling through, it reciprocates back to the pocket hole. During processing, the spindle speed is 2200-2500mm / min, and the feed rate is 0.03-0.05mm / r; ⑤ After the processing is completed, the burr is removed from the processing positioning device to obtain the finished retainer 8.

[0036] In the above embodiment, the spindle speed when milling the notch is greater than the spindle speed when milling the pocket hole, and the feed rate when milling the notch is less than the feed rate when milling the pocket hole. When milling the notch, the speed is consistent with that when milling the pocket hole, or the speed can be appropriately increased, and the feed rate can be reduced to prevent the notch from tilting inward after rapid processing, so as to ensure the integrity and consistency of the notch after processing.

[0037] The parts not described in detail in the above embodiments are prior art.

[0038] It should be noted that although the present invention is described by the above embodiments, the present invention may also have other various embodiments. Without departing from the spirit and scope of the present invention, it is obvious that those skilled in the art may make various corresponding changes and deformations to the present invention, but these changes and deformations should all fall within the scope of protection of the appended claims of the present invention and their equivalents.

Claims

1. A processing and positioning device for an insert-type retainer, characterized in that: It comprises a mandrel (1) and a lower die (2) and an upper die (3) arranged on the mandrel (1); The lower die (2) comprises an outer circumferential surface (201) for supporting the inner circumferential surface of the retainer semi-finished product (4) and a first abutting plane (202) for supporting the non-notch side end surface of the retainer semi-finished product (4); the outer circumferential surface (201) is perpendicular to the first abutting plane (202); and pocket hole avoidance grooves (203) corresponding to the positions of pocket holes to be processed on the retainer semi-finished product (4) are arranged along the circumferential direction of the outer circumferential surface (201); The upper die (3) has an axial extension portion (301) located outside the outer circumferential surface (201) and slidably matched therewith, the end of the axial extension portion (301) has a second abutment plane (302) which is parallel to and opposite to the first abutment plane (202) and is used to press the notch side end face of the retainer semi-finished product (4), and a notch avoidance groove (303) is arranged on the axial extension portion (301) along the circumference of the upper die (3) and passes through the inner and outer sides of the axial extension portion (301) and is connected to the second abutment plane (302), and the notch avoidance groove (303) can overlap with the pocket avoidance groove (203) accordingly; The end of the core shaft (1) is provided with a locking mechanism for applying a clamping force to the lower die (2) and the upper die (3).

2. The processing and positioning device for an insert-type retainer according to claim 1, characterized in that: The outer diameter of the axial extension portion (301) is greater than the outer diameter of the retaining frame semi-finished product (4).

3. The processing and positioning device for an insert-type retainer according to claim 1, characterized in that: The pocket avoidance groove (203) is an oblong hole, and its length direction is along the axial direction of the lower die (2); The notch avoidance groove (303) is a semi-long circular hole, and the widths of the long circular hole and the semi-long circular hole are equal.

4. The processing and positioning device for an insert-type retainer according to claim 1, characterized in that: The lower mold (2) and the upper mold (3) are made of bakelite material.

5. The processing and positioning device for an insert-type retainer according to claim 1, characterized in that: The length of the pocket avoidance groove (203) is greater than the sum of the lengths of the connected pockets and the notches, and the width of the pocket avoidance groove (203) is greater than the width of the pockets.

6. The processing and positioning device for an insert-type retainer according to claim 1, characterized in that: When the outer circumferential surface (201) and the axial extension portion (301) are slidably matched in the axial direction, the notch avoidance groove (303) and the pocket avoidance groove (203) overlap.

7. The processing and positioning device for an insert-type retainer according to claim 1, characterized in that: The locking mechanism comprises a support (5), a pressure cover (6) and a nut (7); A through groove is provided in the middle of the lower die (2) and the upper die (3) along the axial direction for the end of the core shaft (1) to pass through, a support (5) is provided on the side of the core shaft (1) to limit the axial movement of the lower die (2), a pressure cover (6) is provided on the upper side of the upper die (3), and a nut (7) is threadedly connected to the end of the core shaft (1). The nut (7) cooperates with the support (5) to keep the lower die (2) and the upper die (3) therebetween closed.

8. A method for processing an insert type retainer, characterized in that: After the inner and outer diameters are finely turned and the inner and outer corners are chamfered, the semi-finished retainer (4) is installed in the processing positioning device according to any one of claims 1 to 7, and after the processing positioning device is fixed to the drilling and milling processing equipment, the processing is carried out according to the following steps: Drilling pocket holes: using the inner circle of the semi-finished cage (4) as a reference surface, using an alloy drill bit of a processing equipment to drill holes at positions where pocket holes are to be set on the semi-finished cage (4), the holes to be drilled are opposite to the pocket hole avoidance grooves (203), the spindle speed of the processing equipment is 1500-1800 mm / min, the feed rate is 0.1-0.15 mm / r, and a processing allowance of 0.1-0.15 mm is reserved for subsequent milling of holes; Milling pocket holes: Replace the drill bit of the processing equipment with a milling cutter, and use the milling cutter to mill off the pocket hole margin to meet the pocket hole size and accuracy requirements of the finished solid cage. During processing, the spindle speed is 2000-2500mm / min, and the feed rate is 0.03-0.05mm / r; Milling the notch: With the non-notch side end face of the semi-finished cage (4) as the reference plane, the milling cutter processes in the pocket from the reference plane to the other end face. After the end face of the semi-finished cage (4) is milled through, it is reciprocated back to the pocket. During processing, the spindle speed is 2200-2500 mm / min, and the feed rate is 0.03-0.05 mm / r; After the processing is completed, the semi-finished retainer (4) is taken out from the processing positioning device, and the burrs are removed to obtain the finished retainer.

9. A method for processing an insert type retainer according to claim 8, characterized in that: The steps for installing the semi-finished cage (4) into the processing positioning device are as follows: First, install the lower die (2) on the mandrel (1); Then, the retainer semi-finished product (4) is placed on the lower mold (2), so that the retainer semi-finished product (4) is sleeved on the outside of the outer circumferential surface (201) of the lower mold (2), the inner circumferential surface of the retainer semi-finished product (4) is supported by the outer circumferential surface (201), and the first abutting plane (202) abuts against the non-notch side end surface of the retainer semi-finished product (4); Then, the upper die (3) and the lower die (2) are closed, so that the axial extension portion (301) of the upper die (3) is sleeved on the outer circumferential surface (201) of the lower die (2), and the second abutting plane (302) of the upper die (3) abuts against the notch side end surface of the retainer semi-finished product (4); The pocket avoidance groove (203) and the notch avoidance groove (303) are adjusted to correspond one to one; Finally, the lower die (2) and the upper die (3) are clamped by a locking mechanism and are kept closed.

10. The method for processing an insert type retainer according to claim 8, characterized in that: The spindle speed when milling a notch is greater than that when milling a pocket hole, and the feed rate when milling a notch is less than that when milling a pocket hole.

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