CN115041549A

CN115041549A - Thermal check clamp for elastic check ring for hole and machining method

Info

Publication number: CN115041549A
Application number: CN202210868955.3A
Authority: CN
Inventors: 彭云杰; 刘勤利; 王熔; 兰林强; 于兆平; 赵妙春
Original assignee: Avic Power Zhuzhou Aviation Parts Manufacturing Co ltd
Current assignee: Avic Power Zhuzhou Aviation Parts Manufacturing Co ltd
Priority date: 2022-07-22
Filing date: 2022-07-22
Publication date: 2022-09-13

Abstract

The invention relates to a thermal check fixture of a circlip for a hole and a processing method, the thermal check fixture comprises a core rod and a clamping component, wherein the peripheral surface of the core rod is provided with a positioning arc surface and two positioning grooves, the two positioning grooves are symmetrical relative to the symmetrical central line of the positioning arc surface, the diameter of the positioning arc surface is the same as the theoretical diameter of an inner hole of the circlip for the hole, the positioning grooves are formed by two vertical groove side surfaces, and one groove side surface is vertical to the symmetrical central line of the positioning arc surface; the clamping assembly comprises two pressing plates and an adjusting and locking structure, the two pressing plates are respectively located on the two end sides of the core rod, the adjusting and locking structure can adjust the distance between the two pressing plates, the two pressing plates are pressed against the end face of the core rod, and at least one pressing plate can be separated from the end face of the core rod. The thermal checking fixture and the processing method can eliminate deformation generated in the processing process of the elastic check ring, correct the size and shape of the elastic check ring and ensure the processing quality.

Description

Thermal check clamp for elastic check ring for hole and machining method

Technical Field

The invention relates to the field of elastic check ring processing, in particular to a thermal check clamp and a processing method of an elastic check ring for a hole.

Background

The circlip for the hole is used for various parts such as an engine clutch assembly and the like, is arranged in the circular hole, is mainly used as a fixed bearing and prevents axial movement. The outer diameter of the retainer ring is slightly larger than the diameter of the assembly round hole. During installation, a caliper is required to insert the caliper nozzle into a front hole of the retainer ring, the retainer ring is clamped tightly, and the caliper nozzle can be placed into the inner groove corresponding to the designed assembly circular hole to control mechanical movement and clamp the inner groove to limit axial movement of parts such as the bearing, the transmission shaft and the like. Therefore, the circlip for the hole not only can ensure the size and the shape which meet the requirements, but also can have enough elastic tension to ensure that the outer diameter is tightly attached in the inner groove of the assembly round hole, so that the transmission shaft and the bearing can be ensured to stably run in the running process of the engine. The circlip for holes is of an asymmetric thin-wall structure with a center and is provided with a small section of opening, and the circlip for holes is in an open ring shape, and two ends of the circlip for holes are connecting lug parts, as shown in attached drawing 1.

The elastic retainer ring parts for the holes are mainly formed by punching and processing thin plate materials, the hardness is adjusted by heat treatment to achieve the mechanical property required by design, and the important difficulty is that the elastic retainer ring parts have qualified sizes and strong enough elasticity to ensure the use performance of the parts. In the processing process, various radial uneven acting forces are applied, particularly in a high-temperature heat treatment state, the hardness of the retainer ring is improved for ensuring the elasticity, and therefore various stress releases inevitably produce deformation.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a thermal check fixture for a circlip for a hole and a machining method thereof, which can eliminate deformation generated in the machining process of the circlip, correct the size and shape of the circlip, and ensure the machining quality.

In order to achieve the above object, the present invention provides a thermal calibration jig for a circlip for a hole, the circlip for a hole having connecting ears at both ends, the thermal calibration jig comprising: the thermal checking fixture comprises a core rod and a clamping assembly, wherein a positioning arc surface and two positioning grooves which are respectively positioned at two sides of the positioning arc surface are arranged on the outer peripheral surface of the core rod, the two positioning grooves are symmetrical about a symmetrical center line of the positioning arc surface, the diameter of the positioning arc surface is the same as the theoretical diameter of an inner hole of the elastic check ring for the hole, the positioning groove is composed of two vertical groove side surfaces, and one groove side surface is vertical to the symmetrical center line of the positioning arc surface; the clamping assembly comprises two pressing plates and an adjusting and locking structure, the two pressing plates are respectively positioned at the two end sides of the core rod, the adjusting and locking structure can adjust the distance between the two pressing plates, so that the two pressing plates are pressed against the end surface of the core rod, and at least one pressing plate can be separated from the end surface of the core rod; when the hole with the theoretical size is sleeved on the core rod by the elastic baffle ring, the inner hole surface of the hole is attached to the positioning arc surface, the two connecting lug parts are respectively positioned in the two positioning grooves, and the connecting lug parts are abutted against the side surfaces of the two grooves.

Further, two press plates in the clamping assembly can move relative to the end face of the core rod.

Further, adjust locking structure and include connecting rod and gland nut of spiro union on the connecting rod, the connecting rod passes the plug and stretches out in the plug both ends, and the connecting rod can be relative plug axial displacement, and two clamp plates are installed on the connecting rod, and two clamp plates can both remove along the connecting rod, or a clamp plate is fixed on the connecting rod and another clamp plate can remove along the connecting rod, gland nut supports and leans on the outside at the clamp plate that can remove.

Furthermore, one pressure plate in the adjusting and locking structure is screwed on the connecting rod, and the other pressure plate is sleeved on the connecting rod and can move.

Further, two groove side surfaces of the positioning groove are rounded.

Furthermore, the thickness of the circlip for the hole is H, and the length L of the mandrel is N H < L < (N +1) H, wherein N is a positive integer which is more than or equal to 2.

Further, one of the clamping components is fixed on the end face of the core rod, and the other clamping component can move to be close to or far away from the end face of the core rod.

Furthermore, the adjusting and locking structure comprises a screw fixed at the end of the core rod and a nut screwed on the screw, the movable pressure plate is arranged on the screw and can move along the screw, and the nut abuts against the outer side of the movable pressure plate.

The invention also provides a processing method of the elastic retainer ring for the hole, which comprises the following steps:

machining and forming: processing the inner and outer contours of the elastic retainer ring for the hole;

a heat treatment process: carrying out heat treatment on the elastic retainer ring to enable the elastic retainer ring for the hole to meet the design hardness requirement;

in the machining and forming process, when the outer contour of the circlip for hole is machined, the outer diameter of the part is increased, and the outer diameter of the machined circlip for hole is equal to (1+ a) phi ₁ Wherein phi ₁ The theoretical size of the outer diameter of the elastic check ring for the hole is shown, and a is a deformation shrinkage coefficient and is 0.0022-0.003; after the heat treatment process, a thermal sizing process is added to correct the shape of the part, and the thermal sizing process comprises the following steps: the thermal checking fixture is used for clamping a plurality of elastic check rings for holes, and then the thermal treatment is carried out to check the shape and the size of the elastic check rings for holes

As described above, the thermal check jig and the processing method according to the present invention have the following advantageous effects:

1. through the overall dimension of plug, restriction circlip for hole does not take place to kick-back shrink and warp, through the clamping action of two clamp plates, can prevent to contact the retaining ring axial displacement and warp, stops opening part axial dislocation scheduling problem behind the heat treatment school type to reach the purpose of rectifying the shape, can prevent simultaneously that the retaining ring from being heated the thermal expansion back, the retaining ring drops unexpected problems such as plug and takes place.

2. The positioning groove formed by two vertical groove side surfaces is adopted, so that the parts of the circlip for the hole can be conveniently clamped and disassembled, and the problem that the circlip for the hole is difficult to install due to too high hardness after quenching is avoided.

3. Unexpected problems such as falling off of the core rod after the hole circlip is thermally expanded can be prevented; during hot type correction, the circlip for holes can be vertically placed on the workbench by depending on the hot checking fixture, and the external force of the circlip for holes is only influenced by the clamping force of the fixture, so that the influence of the external force is reduced.

4. Compared with the existing processing method, the processing method of the invention has the advantages of obviously improved qualification rate, realization of economic benefit, labor cost saving and greatly improved part quality.

Drawings

Fig. 1 is a schematic structural view of a circlip for hole.

Fig. 2 is a schematic structural view of the thermal verification jig of the present invention.

Fig. 3 is a sectional view taken along line a-a in fig. 2.

Fig. 4 is a schematic structural view of the mandrel of the present invention.

Fig. 5 is a schematic working diagram of an elastic retainer ring for sleeving a hole on a mandrel bar according to the present invention.

Description of the element reference numerals

Elastic retainer ring for 1 hole

11 connecting ear

2 core rod

21 positioning arc surface

22 positioning groove

221 groove flank

23 through hole

3 pressing plate

4 connecting rod

41 threaded segment

5 pressing nut

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in figures 1 to 5, the invention provides a thermal checking fixture for a circlip 1 for a hole, which is used for checking the shape and the size of the circlip 1 for clamping the hole, the thermal checking fixture comprises a core rod 2 and a clamping assembly, the outer peripheral surface of the core rod 2 is provided with a clamping assembly, and the clamping assembly is arranged on the outer peripheral surface of the core rod 2The positioning cambered surface 21 and the two positioning grooves 22 respectively positioned at two sides of the positioning cambered surface 21 are arranged on the positioning elastic retainer ring 1, the two positioning grooves 22 are symmetrical relative to a symmetrical center line B of the positioning cambered surface 21, the diameter size of the positioning cambered surface 21 is the same as the inner hole theoretical diameter size of the elastic retainer ring for holes 1, and the positioning elastic retainer ring for holes is shown in fig. 1 and 4, namely, the radius D is phi ₂ The positioning groove 22 is composed of two groove side surfaces 221 which are perpendicular to each other, and one of the groove side surfaces 221 is perpendicular to a symmetrical center line B of the positioning arc surface 21; the clamping assembly comprises two pressing plates 3 and an adjusting and locking structure, the two pressing plates 3 are respectively positioned at two end sides of the core rod 2, the adjusting and locking structure can adjust the distance between the two pressing plates 3, so that the two pressing plates 3 are pressed against the end surface of the core rod 2, and at least one pressing plate 3 can be separated from the end surface of the core rod 2; when the circlip 1 for a hole with a theoretical size is sleeved on the core rod 2, the inner hole surface of the circlip 1 fits the positioning arc surface 21, the two connecting lugs 11 are respectively positioned in the two positioning grooves 22, and the connecting lugs 11 abut against the two groove side surfaces 221.

The basic working principle of the thermal checking fixture provided by the invention is as follows: the shape and size of the positioning arc surface 21 and the positioning groove 22 in the core rod 2 are determined according to the theoretical inner hole size of the circlip 1 for a hole to be processed and the size of the connecting lug 11. When the hole circlip 1 is used, in the machining process of the hole circlip 1, after the hole circlip 1 is subjected to machining, trimming, heat treatment and other working procedures, the shape of a part is corrected by using a heat checking fixture, specifically, the hole circlip 1 is sleeved on a core rod 2, the inner hole surface is leaned against a positioning arc surface 21, two connecting lugs 11 are respectively positioned in two positioning grooves 22 and are close to two groove side surfaces 221, the length of the core rod 2 is determined according to the thickness of the hole circlip 1, so that the hole circlip 1 or a plurality of holes can be sleeved on the hole circlip 1, and the hole circlip 1 at two ends of the core rod 2 slightly extends out of the end surface of the core rod 2. Then adjusting the position of the two pressing plates 3 by adjusting the locking structure to enable the two pressing plates 3 to be close to the end face of the core rod 2, and clamping the hole on the core rod 2 by using the elastic check ring 1, as shown in fig. 2 and 3, wherein only one elastic check ring 1 for the hole is shown in fig. 3. The positioning cambered surface 21 and the positioning groove 22 in the core rod 2 are determined by the theoretical size of the circlip 1 for the hole, so that the inner diameter of the contact circlip can be supported in all directions in the whole process, the connecting lug part 11 can be abutted against the two groove side surfaces 221, the position of the connecting lug part 11 is supported and limited, and the connecting lug part 11 is prevented from bending inwards.

As shown in fig. 1 to 5, the present invention is further explained below with an embodiment:

in the present embodiment, as shown in fig. 2 and 3, it is preferable that both the platens 3 are movable with respect to the end face of the mandrel 2 and not fixed to the mandrel 2. The adjusting and locking structure comprises a connecting rod 4 and a compression nut 5 screwed on the connecting rod 4, the connecting rod 4 passes through a through hole 23 in the core rod 2 and extends out of two ends of the core rod 2, the connecting rod 4 can move axially relative to the core rod 2, two pressure plates 3 are arranged on the connecting rod 4, as shown in figure 3, when the clamp is placed vertically, the elastic check ring 1 for hole arranged on the clamp is in a flat state, the lower end of the connecting rod 4 is provided with a section of thread, the lower pressure plate 3 is fixed at the lower end of the connecting rod 4 in a screwing mode, of course, the upper end of the connecting rod 4 can be fixed in other modes or provided with a longer thread section 41, the upper pressure plate 3 is sleeved on the connecting rod 4 and can move along the connecting rod 4, the compression nut 5 is screwed on the thread section 41 and abuts against the upper side face (namely the outer side face) of the upper pressure plate 3, thus by rotating the compression nut 5, the position of the upper press plate 3 can be adjusted, i.e. the distance between the two press plates 3 is adjusted. At circlip 1 for the mounting hole, adjust two clamp plates 3 and make it all part with 2 terminal surfaces of plug, easy to assemble, hole circlip 1 finishes the back of installing, and rotatory gland nut 5, two clamp plates 3 all compress tightly on the hole circlip 1 of both sides. Of course, in other embodiments, as shown in fig. 2 and 3, the lower pressing plate 3 may also be changed into the form of the upper pressing plate 3, that is, the lower pressing plate 3 is not fixed by screwing and can also move along the connecting rod 4, and the compression nut 5 is also added to adjust its position, and is arranged symmetrically with the upper pressing plate 3 and the compression nut 5.

In the present embodiment, the thickness of the circlip 1 for holes is denoted by H, and as a preferred design, the length L of the mandrel 2, nhh < L < (N +1) > H, where N is a positive integer greater than or equal to 1, so that the mandrel 2 can be sleeved with the circlips 1 for holes to perform simultaneous calibration, as shown in fig. 2 and 3, and can be securely clamped by the two pressing plates 3.

In the present embodiment, as shown in fig. 2 and 3, it is preferable that the two groove side surfaces 221 of the positioning groove 22 are rounded to facilitate the processing.

By adopting the thermal checking fixture in the embodiment, the core rod 2, the connecting rod 4, the pressing plate 3 and the compression nut 5 can be detached, flexible assembly and convenient manufacture.

The thermal check fixture of the present invention is not limited to the above-mentioned embodiment, and other structures may be adopted, in another embodiment, one pressing plate 3 is fixed on the end surface of the mandrel 2, and the other pressing plate 3 can be moved to be close to or far from the end surface of the mandrel 2, for example, the adjusting and locking structure may include a screw fixed on the end portion of the mandrel 2 and a nut screwed on the screw, the movable pressing plate 3 is mounted on the screw and can move along the screw, and the nut abuts against the outer side of the pressing plate 3, so that the position of the pressing plate 3 is adjusted by the nut to be close to or far from the end surface of the mandrel 2, and clamping or loosening of the hole circlip 1 on the mandrel 2 is realized.

The thermal check fixture disclosed by the invention has the following beneficial effects:

1. through the overall dimension of plug 2, restriction circlip 1 for hole does not take place to kick-back the shrink and warp, through the clamping action of two clamp plates 3, can prevent to contact the retaining ring axial displacement and warp, stops opening part axial dislocation scheduling problem behind the heat treatment school type to reach the purpose of rectifying the shape, can prevent simultaneously that the retaining ring from being heated after the thermal expansion, unexpected problems such as retaining ring drops plug 2 take place.

2. By adopting the positioning groove 22 formed by the two vertical groove side surfaces 221, the parts of the circlip 1 for holes can be conveniently clamped and disassembled, and the problem that the circlip 1 for holes is difficult to install due to too high hardness after quenching is avoided.

3. Unexpected problems such as the falling off of the mandrel 2 after the circlip 1 for hole is thermally expanded can be prevented; during hot type correction, the circlip 1 for holes can be vertically placed on the workbench by depending on a hot checking fixture, and the external force of the circlip 1 for holes is only influenced by the clamping force of the fixture, so that the influence of the external force is reduced.

The invention also provides a processing method of the circlip 1 for holes, which comprises the following steps:

step A: preparing materials and taking a raw material thin plate.

And a step B: machining and forming, namely machining the inner and outer contours of the circlip 1 for the hole; compared with the prior art, the outer diameter of the elastic retainer ring during machining is increased, the machined outer diameter is equal to (1+ a) phi 1, wherein phi 1 is the theoretical size of the outer diameter of the elastic retainer ring 1 for the hole, and a is the deformation shrinkage coefficient and takes the value of 0.0022-0.003, so that the influence of deformation tolerance on parts after subsequent heat treatment can be avoided. When the theoretical diameter dimension of the outer diameter of the circlip 1 is 76mm, the machining diameter dimension is preferably 76.2 mm.

Step C: deburring, which is a preparation for the subsequent process, the fitter drills a hole in the coupling lug 11 of the circlip 1 for deburring.

Step D: and a heat treatment process, namely performing heat treatment on the elastic check ring, wherein the heat treatment process comprises a quenching process step and a tempering process step, so that the elastic check ring 1 for the hole meets the design hardness requirement.

After the heat treatment process, particularly after the tempering process is completed, adding a process E: a hot-sizing process, wherein the hot-sizing fixture is used for clamping a plurality of circlips 1 for holes, specifically, the circlips 1 for holes are sleeved on a core rod 2, the inner cavity surface of the circlip 1 for holes is attached to a positioning arc surface 21, two connecting lug parts 11 are respectively positioned in two positioning grooves 22, the circlips 1 for holes are kept to be attached when a plurality of the circlips 1 for holes are arranged, and the circlips 1 for holes are clamped by two pressing plates 3; after the whole is assembled by clamping, the core rod is placed into a heat treatment furnace for heat treatment, the size of the inner hole of the circlip 1 for limiting the hole is controlled to be in a theoretical size under the clamping action of the shape of the core rod 2 and the two pressing plates 3, and rebound shrinkage deformation does not occur, so that the shape and size of the circlip 1 for limiting the hole are corrected. In the thermal correction process, after the thermal correction clamp clamps the circlip 1 for the hole, the circlip 1 for the hole can be vertically placed on the workbench by depending on the thermal correction clamp, and the external force of the circlip 1 for the hole is only influenced by the clamping force of the clamp.

After the thermal sizing process, the finished part is generally obtained through the processes of magnetic powder inspection for cracks, organic sizing and elastic test for inspection, surface treatment oxidation, surface appearance inspection, cleaning, packaging, warehousing and the like.

After the processing method is put into use, the qualification rate is obviously improved by tracking the data of the field processed parts compared with the existing processing method, the qualification rate of the parts before improvement is 70 percent, and the qualification rate after improvement is more than 95 percent. Not only can realize economic benefits, but also can save labor cost. The delivered parts are greatly improved in quality, the problem of quality of assembly and test is solved, and the requirements of customers and user representatives are met.

The thermal correction clamp and the processing method solve the problem that the part of the circlip 1 for the hole deforms after being subjected to heat treatment, also solve the problem that the connecting lug part 11 of the circlip 1 for the hole has inconsistent inward bending tendency and height due to unreasonable design of the existing clamp, solve a series of problems that the deformation amount of the part due to heat treatment is offset by changing the process size and the like, and directly solve the problems that the outer diameter of the part assembly is smaller and the axial rotation cannot meet the use requirement.

In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a hot check anchor clamps of circlip for hole, circlip for hole (1) both ends have connection ear (11), its characterized in that: the thermal checking fixture comprises a core rod (2) and a clamping assembly, wherein a positioning arc surface (21) and two positioning grooves (22) which are respectively positioned at two sides of the positioning arc surface (21) are arranged on the outer peripheral surface of the core rod (2), the two positioning grooves (22) are symmetrical about a symmetrical center line of the positioning arc surface (21), the diameter size of the positioning arc surface (21) is the same as the inner hole theoretical diameter size of the circlip (1) for the hole, the positioning groove (22) is formed by two perpendicular groove side surfaces (221), and one groove side surface (221) is perpendicular to the symmetrical center line of the positioning arc surface (21); the clamping assembly comprises two pressing plates (3) and an adjusting and locking structure, the two pressing plates (3) are respectively positioned at the two end sides of the core rod (2), the adjusting and locking structure can adjust the distance between the two pressing plates (3), so that the two pressing plates (3) are pressed against the end surface of the core rod (2), and at least one pressing plate (3) can be separated from the end surface of the core rod (2); when the circlip (1) for the hole with the theoretical size is sleeved on the core rod (2), the inner hole surface of the hole is attached to the positioning arc surface (21), the two connecting lug parts (11) are respectively positioned in the two positioning grooves (22), and the connecting lug parts (11) are abutted against the two groove side surfaces (221).

2. The thermal collation fixture of claim 1, wherein: two press plates (3) in the clamping assembly can move relative to the end face of the core rod (2).

3. The thermal collation jig of claim 2, wherein: adjust locking structure and include connecting rod (4) and gland nut (5) of spiro union on connecting rod (4), connecting rod (4) pass plug (2) and stretch out in plug (2) both ends, and connecting rod (4) can be relative plug (2) axial displacement, and two clamp plates (3) are installed on connecting rod (4), and two clamp plates (3) can both remove along connecting rod (4), or one clamp plate (3) is fixed on connecting rod (4) and another clamp plate (3) can remove along connecting rod (4), gland nut (5) support by the outside at clamp plate (3) that can remove.

4. The thermal collation jig of claim 3, wherein: one pressing plate (3) in the clamping assembly is in threaded connection with the connecting rod (4), and the other pressing plate (3) is sleeved on the connecting rod (4) and can move.

5. The thermal collation jig of claim 1, wherein: the two groove side surfaces (221) of the positioning groove (22) are rounded.

6. The thermal collation jig of claim 1, wherein: the thickness of the circlip (1) for the hole is H, the length L of the core rod (2), N H < L < (N +1) H, wherein N is a positive integer greater than or equal to 2.

7. The thermal collation jig of claim 1, wherein: one pressing plate (3) in the clamping assembly is fixed on the end face of the core rod (2), and the other pressing plate (3) can move to be close to or far away from the end face of the core rod (2).

8. The thermal collation jig of claim 7, wherein: the adjusting and locking structure comprises a screw rod fixed at the end part of the core rod (2) and a nut screwed on the screw rod, the movable pressing plate (3) is installed on the screw rod and can move along the screw rod, and the nut abuts against the outer side of the movable pressing plate (3).

9. A processing method of a circlip for a hole comprises the following steps:

machining and forming: processing the inner and outer contours of the circlip (1) for the hole;

a heat treatment process: carrying out heat treatment on the elastic retainer ring to ensure that the elastic retainer ring (1) for the hole meets the design hardness requirement;

the method is characterized in that: in the machining and forming process, when the outer contour of the circlip (1) for holes is machined, the outer diameter of the part is increased, and the outer diameter of the machined circlip (1) for holes is equal to (1+ a) phi ₁ Wherein phi ₁ The theoretical size of the outer diameter of the elastic retainer ring (1) for the hole is shown, and a is a deformation shrinkage coefficient and is 0.0022-0.003;

after the heat treatment process, a thermal sizing process is added to correct the shape of the part, and the thermal sizing process comprises the following steps: the thermal checking fixture of any one of claims 1 to 8 is used for clamping a plurality of circlips (1) for holes, and then heat treatment is carried out to correct the shape and the size of the circlips (1) for holes.