Check ring mounting groove structure, forming die and forming method

Abstract

The invention relates to the technical field of part machining, in particular to a check ring mounting groove structure, a forming mold and a forming method. The check ring mounting groove structure comprises a sleeve, the sleeve comprises a plurality of clearance areas formed at intervals in the circumferential direction, the clearance areas are in a groove shape, and one end of each clearance area extends to the end of the sleeve in the axial direction and forms the open end of the corresponding clearance area; the sleeve further comprises a plurality of installation areas formed at intervals in the circumferential direction, the installation areas are in a groove shape, and each installation area extends in the circumferential direction of the sleeve and communicates with every two adjacent receding areas. The mounting areas and the receding areas are alternately arranged in the circumferential direction of the sleeve, the communicated mounting areas and receding areas form an annular groove used for mounting the check ring, and the mounting areas are configured to be capable of limiting the check ring; according to the check ring mounting groove structure, the structural strength of parts where the check ring is mounted can be improved, and the weight and the material cost of the parts are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of parts processing, and in particular to a retaining ring installation groove structure, a forming die and a forming method. Background Art

[0002] like Figure 1 As shown, the installation method of the wire retaining ring is a groove that matches the diameter of the wire retaining ring. Since the groove is concave, it is currently mostly processed by turning or milling to remove material.

[0003] like Figure 2 As shown, in order to ensure that the installed parts have sufficient strength, they can usually only be shafts, sleeve-type structural parts, castings, etc. Even stamping parts have to increase the material thickness to increase the strength of the product, such as Figure 3 For stamping parts, the original material thickness of 2.2mm can achieve the specified functional strength of the parts. However, the presence of the retaining ring mounting groove reduces the strength of the parts, so the material thickness has to be increased to 4.0mm, which greatly increases the cost and weight of the parts. How to design a new retaining ring mounting groove structure to avoid or reduce the reduction in the structural strength of the parts installed by the retaining ring due to the retaining ring mounting groove? Summary of the Invention

[0004] In view of the above shortcomings of the prior art, the purpose of the present invention is to provide a retaining ring installation groove structure, a forming mold and a forming method, which can improve the structural strength of the part on which the retaining ring is installed and reduce the weight and material cost of the part.

[0005] To achieve the above-mentioned and other related purposes, the present invention provides a retaining ring mounting groove structure, comprising:

[0006] A sleeve, the sleeve comprising a plurality of clearance areas formed at intervals along a circumferential direction, the clearance areas being in a groove shape, one end of the clearance area extending in an axial direction to an end of the sleeve and forming an open end of the clearance area;

[0007] The sleeve further comprises a plurality of installation areas formed at intervals along the circumferential direction, wherein the installation areas are in the shape of grooves, and each of the installation areas extends along the circumferential direction of the sleeve and connects two adjacent avoidance areas;

[0008] The installation area and the clearance area are alternately arranged along the circumferential direction of the sleeve, and the connected installation area and the clearance area form an annular groove for installing a retaining ring. The installation area is configured to limit the retaining ring.

[0009] In one embodiment of the present invention, the installation area is communicated with an end of the air-avoidance area away from the open end.

[0010] In one embodiment of the present invention, a stop protrusion is provided at the annular groove for limiting the circumferential position of the retaining ring;

[0011] And / or the stop protrusion is integrally formed with the sleeve.

[0012] In one embodiment of the present invention, the sleeve further includes an integrally formed flange and / or bottom.

[0013] In view of the above shortcomings of the prior art, the object of the present invention is to provide a forming die for forming the clearance area or installation area of ​​the retaining ring installation groove structure, the forming die comprising:

[0014] Concave die;

[0015] a male mold, arranged opposite to the female mold along a first direction;

[0016] A plurality of sliders are provided along the circumferential direction of the die, each of the sliders being slidably provided at one end of the die close to the punch along the radial direction of the die, and the sliders being configured to move along the radial direction of the die and fit against the side wall of the sleeve;

[0017] The punch comprises a plurality of sub-punches arranged along the circumferential direction of the die, and a first gap for sleeve forming is formed between the sub-punches and the slider.

[0018] In one embodiment of the present invention, a mold core is provided at one end of the male mold, and a plurality of inclined surface structures are provided at one end of the male mold close to the sub-male mold;

[0019] An end of each sub-punch close to the center of the punch is provided with an inclined wedge structure facing the mold core, and each inclined surface structure of the mold core is provided corresponding to the inclined wedge structure of each sub-punch;

[0020] The mold core is configured to be able to move toward the sub-punches along a first direction and drive each of the sub-punches to move toward the corresponding slider along a radial direction of the die.

[0021] In one embodiment of the present invention, the molding die further comprises:

[0022] Upper die seat;

[0023] The lower die base is clamped with the upper die base along a first direction;

[0024] An inclined block is arranged on the outside of each slider and can move along the first direction; the inclined block is connected to the upper die base, and the inclined block is configured to drive the slider to move along the radial direction of the die and fit the side wall of the sleeve.

[0025] In one embodiment of the present invention, the forming mold further includes a pressing block, which is alternately arranged with the sliding block along the circumferential direction of the die, and the pressing block is connected to the upper die base. The pressing block is configured to follow the upper die base and move toward the die along the first direction to press the flange surface of the sleeve.

[0026] In view of the above shortcomings of the prior art, the object of the present invention is to provide a molding method comprising the following steps:

[0027] A blank sleeve is provided, the blank sleeve comprising at least two clearance areas formed at intervals along a circumferential direction, the clearance areas being groove-shaped, and one end of the clearance area extending axially to an end of the sleeve to form an open end of the clearance area;

[0028] The blank sleeve is placed in a second forming die, and a mounting area is formed at the other end of the air avoidance area away from the open end by the second forming die, and the mounting area and the air avoidance area are alternately arranged along the circumferential direction of the blank sleeve and circumferentially connected, and the connected mounting area and air avoidance area form an annular groove that can install and limit the retaining ring.

[0029] In one embodiment of the present invention, the step of providing a blank sleeve comprises:

[0030] Providing a first blank, wherein the first blank is a sleeve structure or a sleeve structure with a bottom and / or a flange;

[0031] The first blank is placed in a first forming die, and the first blank is formed into a blank sleeve by the first forming die.

[0032] In one embodiment of the present invention, the step of placing the first blank into the first forming die and forming the first blank into the blank sleeve by the first forming die further comprises:

[0033] A stop protrusion is integrally formed at the clearance area portion in the annular groove by a first forming die.

[0034] In summary, the retaining ring mounting groove structure of the present invention forms a plurality of groove-shaped avoidance areas at intervals along the circumferential direction of the sleeve, and extends one end of the avoidance area along the axial direction to the end of the sleeve to form an open end of the avoidance area, so that the formation of the avoidance area will not reduce or will not reduce too much the structural strength of the sleeve, and the avoidance area has no negative draft angle; a plurality of groove-shaped installation areas are formed at intervals along the circumferential direction of the sleeve, and each installation area extends along the circumferential direction of the sleeve and connects two adjacent avoidance areas, so that the installation areas and the avoidance areas are alternately arranged along the circumferential direction of the sleeve, so that the connected installation areas and avoidance areas form an annular groove that can be used to install the retaining ring, so that The installation area can limit the retaining ring in the axial and radial directions; since the structural changes in the installation area are relatively abrupt, it will affect the structural strength. Therefore, this case arranges the installation area and the air avoidance area alternately. Since the closed end of the air avoidance area is a smooth transition, it can provide a smoother stress distribution, reduce stress concentration, and make the installation area connected with the air avoidance area in the radial direction, thereby improving the stress distribution in the installation area and reducing the stress concentration in the installation area, so that the sleeve does not need to increase the material thickness to enhance the structural strength, or does not need to increase the material thickness too much to enhance the missing structural strength, thereby ensuring the structural strength of the retaining ring installation groove structure in this case and saving material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 This is a schematic diagram of the retaining ring structure involved in the background technology of the present invention;

[0037] Figure 2 This is a schematic diagram of a structure in which a retaining ring needs to be installed on a casting involved in the background technology of the present invention;

[0038] Figure 3 This is a schematic diagram of a structure in which a retaining ring needs to be installed on a stamping part involved in the background technology of the present invention;

[0039] Figure 4 Schematic diagram of the structure of the retaining ring mounting groove structure in one embodiment of the present invention;

[0040] Figure 5 for Figure 4 Structural cross-sectional view at AA;

[0041] Figure 6 for Figure 5A magnified view of the structure at location M;

[0042] Figure 7 for Figure 4 Structural cross-sectional view at BB;

[0043] Figure 8 for Figure 7 A magnified view of the structure at location N;

[0044] Figure 9 Schematic diagram of a three-dimensional structure in which a retaining ring is installed in a retaining ring installation groove structure in one embodiment of the present invention;

[0045] Figure 10 Schematic diagram of a three-dimensional structure in which no retaining ring is installed in the retaining ring installation groove structure in one embodiment of the present invention;

[0046] Figure 11 Schematic diagram of the blank sleeve structure in one embodiment of the present invention;

[0047] Figure 12 for Figure 11 Structural cross-sectional view at CC;

[0048] Figure 13 for Figure 11 Structural cross-sectional view at DD;

[0049] Figure 14 Schematic diagram of the shaping mold structure in one embodiment of the present invention;

[0050] Figure 15 for Figure 14 Structural cross-section view at PP;

[0051] Figure 16 This is a schematic structural diagram of a first forming mold in one embodiment of the present invention;

[0052] Figure 17 for Figure 16 Structural cross-sectional view at EE;

[0053] Figure 18 for Figure 17 A local enlarged view of the structure at J;

[0054] Figure 19 for Figure 16 The structural cross-sectional view at FF;

[0055] Figure 20 for Figure 19 A local enlarged view of the structure at K;

[0056] Figure 21 This is a schematic structural diagram of a second forming mold in one embodiment of the present invention;

[0057] Figure 22 for Figure 21 Structural cross-sectional view at GG;

[0058] Figure 23 for Figure 22 A local enlarged view of the structure at L;

[0059] Figure 24 for Figure 21 Structural cross-sectional view at HH of ;

[0060] Figure 25 for Figure 24 A local enlarged view of the structure at location M;

[0061] Component number description: blank sleeve 101, sleeve 1, annular groove 10, air avoidance area 11, open end 111, closed end 112, installation area 12, stop protrusion 13, flange 14, bottom 15, diameter reducing section 16, original diameter section 17, annular groove 18, die 2, punch 3, sub-punch 31, wedge structure 311, slider 4, first sub-slider 41, second sub-slider 42, elastic member 43, core 5, inclined surface structure 51, reset member 52, upper die base 6, lower die base 7, oblique block 8, pressing block 9, retaining ring 20, first punch 1013, first die 1011, support plate 1012, original blank 1001. DETAILED DESCRIPTION

[0062] The following describes the embodiments of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following examples and the features in the examples can be combined with each other unless they conflict. It should also be understood that the terms used in the examples of the present invention are for the purpose of describing specific embodiments, not for the purpose of limiting the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are generally carried out under conventional conditions or under the conditions recommended by the manufacturers.

[0063] See also Figures 1 to 25. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0064] When numerical ranges are given in the examples, it should be understood that unless otherwise specified herein, both endpoints of each numerical range and any value between the two endpoints may be used. Unless otherwise defined, all technical and scientific terms used herein are consistent with the prior art as understood by those skilled in the art and the description of the present invention. Any prior art methods, devices, and materials similar or equivalent to those described in the examples of the present invention may also be used to implement the present invention.

[0065] The retaining ring in this case is generally made of metal materials, such as a circlip or a wire retaining ring. The retaining ring is generally used to fix the axial position of other parts on a shaft or hole. It is usually made of spring steel and has an opening that can be elastically opened to be installed on the shaft or hole, and return to its original shape after release, thereby fixing other parts.

[0066] For example, the bearing is fixed and a wire retaining ring is used between the bearing and the sleeve 1 to prevent the bearing from moving in the axial direction.

[0067] For example, a wire retaining ring is used between a gear or pulley and sleeve 1 to ensure that they do not slide axially during operation; for example, a wire retaining ring is used at sleeve 1 of a valve or other control element to fix the valve core or other movable parts.

[0068] See also Figure 1The retaining ring 20 in this case is generally made of metal material, such as a circlip or a wire retaining ring. The retaining ring 20 is generally used to fix the axial position of other parts on a shaft or hole. It is usually made of spring steel and has an opening that can be elastically opened to be installed on the shaft or hole, and returns to its original shape after being released, thereby fixing other parts. For example, to fix a bearing, a wire retaining ring is used between the bearing and the sleeve 1 to prevent the bearing from moving in the axial direction. For example, a wire retaining ring is used between a gear or pulley and the sleeve 1 to ensure that they do not slide axially during operation; for example, a wire retaining ring is used at the sleeve 1 of a valve or other control element to fix the valve core or other movable parts.

[0069] See also Figure 1-7 The present invention provides a retaining ring mounting groove structure, comprising a sleeve 1, wherein the sleeve 1 comprises at least two clearance areas 11 formed at intervals along the circumferential direction, wherein the clearance areas 11 are groove-shaped, and one end of the clearance area 11 extends along the axial direction to the end of the sleeve 1 and forms an open end 111 of the clearance area 11;

[0070] The sleeve 1 further includes at least two installation areas 12 formed at intervals along the circumferential direction. The installation areas 12 are in the shape of grooves, and each of the installation areas 12 extends along the circumferential direction of the sleeve 1 and connects two adjacent avoidance areas 11.

[0071] The installation area 12 and the clearance area 11 are alternately arranged along the circumferential direction of the sleeve 1 , and the connected installation area 12 and the clearance area 11 form an annular groove 10 for installing the retaining ring 20 . The installation area 12 is configured to limit the retaining ring 20 .

[0072] It should be noted that the retaining ring mounting groove structure described in this case can be a complete component or a partial structure of a component, but this component must include the retaining ring mounting groove structure, that is, the sleeve 1 including the retaining ring mounting groove structure, so as to facilitate the installation and positioning of the retaining ring 20. The sleeve 1 in this case is a stamped part, that is, the installation area 12 and the air avoidance area 11 are formed by stamping. Since the installation area 12 is connected to one end of the air avoidance area 11 and forms an annular groove 10 that can install the retaining ring 20, the installation area 12 and the air avoidance area 11 are both groove-shaped. Since the end of the groove-shaped air avoidance area 11 away from the annular groove 10 is an open end 111, the axial area from the annular groove 10 of the sleeve 1 to the open end 111 of the air avoidance area 11 forms strip-shaped concave and convex portions that are alternately arranged along the circumferential direction of the sleeve 1. The concave portion is the air avoidance area 11, and the convex portion is the corresponding portion on one side of the installation area 12. Since the installation area 12 is convex relative to the air avoidance area 11, the installation area 12 can limit the retaining ring 20 installed in the annular groove 10. The installation areas 12 in this case are generally evenly spaced along the circumferential direction of the sleeve 1 to provide uniform force.

[0073] This case Figure 5 、 Figure 12 and Figure 13 The F dimension is the inner diameter of the installation area 12. Figure 5 、 Figure 12 and Figure 13 The G dimension is the inner diameter of the avoidance zone 11.

[0074] In this case, a plurality of slot-shaped avoidance areas 11 are first formed at intervals in the circumferential direction of the sleeve 1, and one end of the avoidance area 11 is extended to the end of the sleeve 1 in the axial direction to form an open end 111 of the avoidance area 11. The length of the avoidance area 11 in the axial direction of the sleeve 1 is less than the length of the sleeve 1, and the other end of the avoidance area 11 away from the open end 111 is a closed end 112. Since the closed end 112 is facing the axial direction of the sleeve 1, the closed end 112 can be a relatively gentle angle or arc shape. The formation of the avoidance area 11 generally does not reduce or does not reduce too much the structural strength of the sleeve 1. Area 11 has no negative draft angle; then a plurality of groove-shaped installation areas 12 are formed at intervals in the circumferential direction of the sleeve 1, and each installation area 12 extends along the circumferential direction of the sleeve 1 and connects the two adjacent avoidance areas 11, so that the installation areas 12 and the avoidance areas 11 are alternately arranged along the circumferential direction of the sleeve 1, so that the connected installation areas 12 and avoidance areas 11 form an annular groove 10 capable of installing the retaining ring 20, so that the installation area 12 can limit the retaining ring 20 in the axial direction and radial direction, and the two side walls of the installation area 12 in the axial direction can limit the retaining ring 20 in the axial direction, and the two side walls can be angled or arc-shaped. In this case, if a circle of annular groove 18 for the limit ring 20 is directly formed on the circumferential side wall of the sleeve 1, the abrupt structural change of the annular groove 18 in the axial direction will cause the material thickness at the annular groove 18 to be greatly reduced, so that the stress is concentrated at the annular groove 18, and the structural strength of the sleeve 1 at the annular groove 18 is greatly reduced, and it is necessary to compensate for this problem of reduced structural strength by increasing the material thickness of the entire sleeve 1. In this case, although the groove-shaped installation area 12 is arranged along the circumferential direction of the sleeve 1 and has a negative draft angle, the draft direction of the installation area 12 is along the radial direction of the sleeve 1; since the structural change of the installation area 12 is relatively abrupt, it will affect the structural strength. Therefore, in this case, the installation area 12 and the air avoidance area 11 are arranged alternately, and the closed end 112 of the air avoidance area 11 is a smooth transition, which can provide a smoother stress distribution, reduce stress concentration, and make the installation area 12 connected with the air avoidance area 11 in the radial direction, thereby improving the stress distribution of the installation area 12 and reducing the stress concentration of the installation area 12, so that the sleeve 1 does not need to increase the material thickness to enhance the structural strength, or does not need to increase the material thickness too much to enhance the missing structural strength, thereby ensuring the structural strength of the retaining ring installation groove structure in this case and saving material costs.

[0075] See also Figure 1-7As an optional embodiment of the present case, when the retaining ring 20 is installed on the outer wall of the sleeve 1, the installation area 12 and the air avoidance area 11 are formed on the outer wall of the sleeve 1, and the air avoidance area 11 is recessed from the outer wall of the sleeve 1 toward the axial center of the sleeve 1; or, when the retaining ring 20 is installed on the inner wall of the sleeve 1, the installation area 12 and the air avoidance area 11 are formed on the inner wall of the sleeve 1, and the air avoidance area 11 is recessed from the inner wall of the sleeve 1 toward the outside of the sleeve 1. The specific selection can be made according to actual needs.

[0076] See also Figure 1-7 In one embodiment of the present invention, the sleeve includes a reducing section 16 and an original diameter section 17, the avoidance area 11 is located in the reducing section 16 and extends to the original diameter section 17, one end of the reducing section 16 close to the reducing section 16; the installation area 12 is located between the reducing section 16 and the original diameter section 17, the reducing section 16 and the original diameter section 17 are adjacently arranged along the axial direction of the sleeve 1, and the end of the reducing section 16 away from the original diameter section 17 is the end of the sleeve 1.

[0077] See also Figure 1-7 In one embodiment of the present invention, the installation area 12 is connected to the end of the avoidance area 11 away from the open end 111, so as to better optimize the stress distribution of the installation area 12 to avoid or reduce the reduction of the structural strength in the installation area 12.

[0078] See also Figure 1-7 As an optional embodiment of the present invention, a stop protrusion 13 is provided at the annular groove 10 for limiting the circumferential direction of the retaining ring 20;

[0079] And / or the stop protrusion 13 is integrally formed with the sleeve 1 .

[0080] It should be noted that the stop protrusion 13 can effectively limit the movement of the wire retaining ring 20 in the circumferential direction, ensuring that the retaining ring 20 remains stable when subjected to force, thereby improving the fixing effect and reliability of the entire structure; the stop protrusion 13 and the sleeve 1 can be integrally formed or not, and the integrally formed stop protrusion 13 is a part of the sleeve 1, which can reduce additional processing steps and the number of components, simplify the manufacturing process, not only reduce production costs, but also shorten the production cycle.

[0081] See also Figure 1-7 As an optional embodiment of the present invention, the sleeve 1 further includes an integrally formed flange 14 and / or bottom 15 .

[0082] It should be noted that some components have an integrally formed flange 14 and / or base 15, similar to the sleeve 1 with a base and flange. This eliminates the need for welding or bolting, reduces potential weaknesses, and makes the sleeve 1 more robust and durable under load. Furthermore, the integrally formed structure helps to more evenly distribute stress, reduce stress concentration, and thus improve the fatigue resistance of the overall structure. It should be understood that the integrally formed flange 14 and base 15 can be customized according to specific application requirements, such as adding additional mounting holes or interfaces to meet specific functional requirements.

[0083] See also Figure 16-25 The present invention provides a forming mold for forming the clearance area 11 or the installation area 12 of the retaining ring installation groove structure. The first forming mold includes a concave mold 2, a punch 3 and a slider 4;

[0084] The punch 3 is arranged opposite to the die 2 along a first direction; a plurality of sliders 4 are provided along the circumferential direction of the die 2, and each slider 4 is slidably provided at one end of the die 2 close to the punch 3 along the radial direction of the die 2. The sliders 4 are configured to be able to move along the radial direction of the die 2 and fit the side wall of the sleeve 1;

[0085] The punch 3 includes a plurality of sub-punches 31 arranged along the circumferential direction of the die 2 , and a first gap for forming the sleeve 1 is formed between the sub-punches 31 and the slider 4 .

[0086] Furthermore, the side of each sub-punch 31 facing the slider 4 matches the shape of the corresponding position of the inner wall (outer wall) of the avoidance zone 11; the side of each slider 4 facing the sub-punch 31 matches the shape of the corresponding position of the outer wall (inner wall) of the avoidance zone 11, thereby forming the first molding mold in this case.

[0087] Furthermore, the side of each sub-punch 31 facing the slider 4 matches the shape of the corresponding position of the inner wall (outer wall) of the installation area 12; the side of each slider 4 facing the sub-punch 31 matches the shape of the corresponding position of the outer wall (inner wall) of the installation area 12, thereby forming the second molding mold in this case.

[0088] It should be noted that, before the retaining ring mounting groove structure is formed by the first forming die in this case, the first blank is used as the raw material, and before the retaining ring mounting groove structure is formed by the second forming die, the blank sleeve 101 is used as the raw material, and the blank sleeve 101 includes at least two spaced-apart areas 11 formed along the circumferential direction, and the spaced-apart areas 11 are groove-shaped, and one end of the spaced-apart area 11 extends to the end of the sleeve 1 along the axial direction and forms an open end 111 of the spaced-apart area 11; when the second forming die (first forming die) is used for stamping in this case, the blank sleeve 101 (first blank) is placed in the die 2, and when When the blank sleeve 101 (first blank) has a flange 14, the blank sleeve 101 (first blank) is away from the bottom 15 of the flange 14 and does not need to contact the bottom 15 of the die 2. The flange 14 can be used to hang the blank sleeve 101 (first blank) on the slider 4 above the die 2; when the end of the blank sleeve 101 (first blank) does not have a flange 14, one end of the blank sleeve 101 (first blank) placed on the die 2 contacts the bottom 15 of the die 2, and the other end extends out of the die 2 and extends to the slider 4. The first gap between the punch 3 and the slider 4 is the forming position of the mounting area 12 (air avoidance area 11) of the retaining ring mounting groove structure. Each of the sliders 4 can be driven by a first driving element, which can be an inclined block 8 linked to the upper mold base 6, or a hydraulic telescopic rod, or the position of the slider 4 after manual movement can be locked by a fastener; each sub-punch 31 of the punch 3 is driven by a second driving element, which can be a hydraulic telescopic rod or a mold core 5 or other components that meet the usage requirements.

[0089] See also Figure 16-25 As an optional embodiment of the present invention, the punch 3 is arranged on the upper die base 6, and the die 2 is arranged on the lower die base 7.

[0090] As an optional embodiment of the present invention, a core 5 is provided at one end of the punch 3, and a plurality of inclined surface structures 51 are provided at one end of the core 5 close to the sub-punch 31;

[0091] An end of each sub-punch 31 close to the center of the punch 3 is provided with an inclined wedge structure 311 facing the mold core 5, and each inclined surface structure 51 of the mold core 5 is provided corresponding to the inclined wedge structure 311 of each sub-punch 31;

[0092] The mold core 5 is configured to be able to move toward the sub-punches 31 along a first direction and drive each sub-punch 31 to move toward the corresponding slider 4 along the radial direction of the die 2 .

[0093] It should be noted that the mold core 5 is connected to the upper mold base 6. When the upper mold base 6 and the lower mold base 7 are closed along a first direction, the first direction being the circumferential direction of the mold core 5. The mold core 5 follows the upper mold base 6 and moves toward each sub-punch 31 of the punch 3. The inclined surface structure 51 of the mold core 5 squeezes the inclined wedge structure 311 of each sub-punch 31, thereby causing each sub-punch 31 to move along the radial direction of the die 2 toward the corresponding slider 4, thereby cooperating with the slider 4 to form the mounting area 12 (clearance area 11) of the retaining ring mounting groove structure. The provision of the mold core 5 not only simplifies the structure of the entire molding die, but also enables the various components of the entire molding die to cooperate more harmoniously when working.

[0094] See also Figure 16-25 As an optional embodiment of the present invention, the first forming mold further includes an upper mold base 6, a lower mold base 7 and an inclined block 8 and / or a pressing block 9;

[0095] The lower die base 7 and the upper die base 6 are clamped along a first direction, wherein the first direction is the axial direction of the punch 3 or the mold core 5;

[0096] The inclined block 8 is provided on the outside of each of the sliders 4 and is movable in a first direction; the inclined block 8 is connected to the upper die base 6, and is configured to drive the sliders 4 to move in the radial direction of the die 2 and fit the side wall of the sleeve 1;

[0097] The pressing block 9 and the slider 4 are alternately arranged along the circumferential direction of the die 2. The pressing block 9 is connected to the upper die base 6. The pressing block 9 is configured to follow the upper die base 6 and move toward the die 2 along the first direction to press the flange 14 surface of the sleeve 1.

[0098] It should be noted that the inclined block 8 is connected to the upper die base 6 and moves with the upper die base 6. When the upper die base 6 moves toward the lower die base 7 along the first direction, the inclined block 8 is arranged on the outside of each slider 4 with the axial direction of the die 2 and the punch 3 as the center, and is arranged corresponding to each slider 4. Each inclined block 8 and each slider 4 can be slidably matched to limit, that is, when the inclined block 8 moves downward along the first direction, it can drive the slider 4 to move along the radial direction of the die 2 toward the punch 3. When the inclined block 8 moves upward along the first direction, it can drive the slider 4 to move along the radial direction of the die 2 away from the punch 3.

[0099] In this case, when there is a flange 14 in the retaining ring mounting groove structure, the pressing block 9 is required to press and fix the flange 14. When there is no flange 14 in the retaining ring mounting groove structure, the pressing block 9 is not required to press and fix the flange 14. The pressing block 9 is installed on the upper mold base 6 and is located on the upper side of the slider 4 and the outer side of the punch 3. Through the setting of the pressing block 9, the flange 14 of the retaining ring mounting groove structure can be squeezed and fixed, which is beneficial to improve the molding accuracy of the retaining ring mounting groove structure.

[0100] See also Figure 16-25 Furthermore, the number of the installation areas 12 (avoidance areas 11) arranged along the circumferential direction is the same as the number of the sub-punches 31, and the sub-punches 31 are generally arranged evenly so as to evenly form the installation areas 12 (avoidance areas 11) in the circumferential direction.

[0101] Furthermore, there are at least two sliders 4 to facilitate demoulding of the retaining ring mounting groove structure after molding.

[0102] Furthermore, the sub-convex molds 31 are generally provided in two or more, for example, four.

[0103] Furthermore, four sliders 4 may be provided. Since the protruding structures 14 are arranged at intervals along the circumferential direction, all the sliders 4 do not have to be enclosed together to form a circle.

[0104] Furthermore, the molding die further includes a reset member 52 for resetting each sub-punch 31 , and the reset member 52 is a spring or an elastic telescopic rod.

[0105] Furthermore, the slider 4 includes a first sub-slider 41 and a second sub-slider 42, and the second sub-slider 42 is connected to the first sub-slider 41 by an elastic member 43, so that the slider 4 can adaptively resist and fix to various surfaces of the blank sleeve 101 or the first blank, which helps to improve the forming accuracy of the retaining ring mounting groove structure.

[0106] See also Figure 4-25 The present invention provides a molding method, comprising the following steps:

[0107] A blank sleeve 1 is provided, wherein the blank sleeve 1 includes at least two clearance areas 11 formed at intervals along the circumferential direction, wherein the clearance areas 11 are groove-shaped, and one end of the clearance area 11 is an open end 111 extending to the end of the blank sleeve 1;

[0108] The blank sleeve 1 is placed in a second forming mold, and a mounting area 12 is formed at the other end of the avoidance area 11 away from the open end 111 by the second forming mold, and the mounting area 12 and the avoidance area 11 are alternately arranged along the circumferential direction of the blank sleeve 1 and circumferentially connected, and the connected mounting area 12 and the avoidance area 11 form an annular groove 10 that can install and limit the retaining ring 20.

[0109] It should be noted that the blank sleeve 101 is a semi-finished product of the retaining ring mounting groove structure. The blank sleeve 101 is generally a stamping part. The blank sleeve 101 may have a flange 14 and / or a bottom 15. The flange 14 and the bottom 15 are respectively located at both ends of the blank sleeve 101. The forming method is realized by a second forming mold.

[0110] See also Figure 4-25 As an optional embodiment of this case, the step of providing the blank sleeve 1 includes:

[0111] Providing a first blank, wherein the first blank is a sleeve structure or a sleeve structure having a bottom 15 and / or a flange 14;

[0112] The first blank is placed into a first forming die, and the first blank is formed into a blank sleeve 1 by the first forming die.

[0113] It should be noted that when the first blank is a blank plate, the blank can be formed into a blank sleeve 101 with a bottom or a blank sleeve 101 with a flange 14 and a bottom 15 through an existing stretching die or a shaping die, and other required structures of the blank sleeve 101 can be stretched out to form the blank sleeve 101.

[0114] See also Figure 4-25 As an optional embodiment of the present invention, the step of placing the first blank into the first forming die and forming the first blank into the blank sleeve 1 by the first forming die further includes:

[0115] A stop protrusion 13 is integrally formed at the clearance area 11 in the annular groove 10 by a first molding die.

[0116] It should be noted that a protrusion may be provided in the radial direction of the first punch 3 of the first forming die, so that a stop protrusion 13 may be integrally formed at the clearance area 11 .

[0117] See also Figure 14-15 As an optional embodiment of this case, the step of providing the first blank includes:

[0118] Providing an original blank 1001, wherein the original blank 1001 is a plate or an original sleeve;

[0119] The first blank is placed into a shaping die, and the original blank 1001 is formed into the first blank by the shaping die.

[0120] See also Figure 14-15 As an optional embodiment of the present invention, the present invention provides a correction mold, including a first punch 1013, a first die 1011 and a supporting plate 1012. The first punch 1013 and the first die 1011 are arranged relative to each other, and the supporting plate 1012 moves following the first punch 1013; air holes are provided in the first punch 1013; the first punch 1013 is configured to drive the supporting plate 1012 toward the first die 1011 along its own axial direction, so as to shape the original blank 1001 into a first blank.

[0121] The first molding die work in this case includes the following steps:

[0122] Place the first blank with the flange 14 into the die 2, and place the flange 14 on the slider 4;

[0123] The first forming mold is started, and the upper mold base 6 and the lower mold base 7 of the first forming mold are closed along the first direction. During the closing process of the upper mold base 6 and the lower mold base 7:

[0124] The inclined block 8 moves in the first direction to drive the slider 4 to move in the radial direction of the die 2 and fit the side wall of the first blank to protect and fix the side wall of the first blank, wherein the upper part of the first blank is exactly located at the slider 4;

[0125] The pressing block 9 moves along the first direction following the upper die holder 6 and presses against the slide 4 to fix the flange 14 of the first blank;

[0126] The punch 3 follows the upper die holder 6 and moves into the first blank. The punch 3 enters the first blank from the upper end of the first blank.

[0127] Subsequently, the mold core 5 follows the upper mold base 6 and moves to the punch 3. The mold core 5 drives the inclined wedge structure 311 of each sub-punch 31 through the inclined surface structure 51, so that each sub-punch 31 moves toward the corresponding slider 4 along the radial direction of the die 2 and squeezes the first blank, thereby forming a plurality of escape areas 11 at intervals in the circumferential direction of the first blank. Generally, each sub-punch 31 of the mold forms a corresponding escape area 11.

[0128] When the blank sleeve 101 is formed, the mold core 5, each sub-punch 31, the pressing block 9, the inclined block 8 and the slide block 4 are retreated along with the upper die base 6.

[0129] The second molding die work in this case includes the following steps:

[0130] Place the blank sleeve 101 with the flange 14 into the die 2, and place the flange 14 on the slide 4;

[0131] The second forming mold is started, and the upper mold base 6 and the lower mold base 7 of the second forming mold are closed along the first direction. During the closing process of the upper mold base 6 and the lower mold base 7:

[0132] The inclined block 8 moves in the first direction to drive the slide block 4 to move in the radial direction of the die 2 and fit against the side wall of the blank sleeve 101 to protect and fix the side wall of the blank sleeve 101, wherein the concave transition portion 13 of the blank sleeve 101 is located exactly at the slide block 4;

[0133] The pressing block 9 moves along the first direction following the upper die holder 6 and presses against the slide 4 to fix the flange 14 of the blank sleeve 101;

[0134] The punch 3 follows the upper die holder 6 and moves into the blank sleeve 101. The punch 3 enters the blank sleeve 101 from one end of the reducing section 16 of the blank sleeve 101.

[0135] Subsequently, the mold core 5 follows the upper mold base 6 and moves to the punch 3. The mold core 5 drives the inclined wedge structure 311 of each sub-punch 31 through the inclined surface structure 51, so that each sub-punch 31 moves toward the corresponding slider 4 along the radial direction of the die 2 and squeezes the blank sleeve 101, thereby forming a plurality of installation areas 12 at intervals in the circumferential direction at the closed end 112 of the clearance area 11 of the blank sleeve 101. Generally, each sub-punch 31 forms a corresponding installation area 12.

[0136] When the retaining ring installation groove structure is formed, the mold core 5, each sub-punch 31, the pressure block 9, the inclined block 8 and the slider 4 are retreated along with the upper mold base 6. Since a negative draft angle is generated during the molding process of the retaining ring installation groove structure through the second molding mold, when the retaining ring installation groove structure is demolded, each sub-punch 31 and the slider 4 need to be retreated along the radial direction of the die 2, so as to facilitate the smooth demolding of the retaining ring installation groove structure.

[0137] In summary, the present invention effectively overcomes some practical problems in the prior art and thus has high utilization value and use significance.

[0138] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A retaining ring mounting groove structure, characterized in that: include: A sleeve, the sleeve comprising a plurality of clearance areas formed at intervals along a circumferential direction, the clearance areas being in a groove shape, one end of the clearance area extending along an axial direction to an end of the sleeve and forming an open end of the clearance area; The sleeve further comprises a plurality of installation areas formed at intervals along the circumferential direction, the installation areas are in the shape of grooves, and each of the installation areas extends along the circumferential direction of the sleeve and connects two adjacent avoidance areas; The installation area and the clearance area are alternately arranged along the circumferential direction of the sleeve, and the connected installation area and the clearance area form an annular groove for installing a retaining ring. The installation area is configured to limit the retaining ring.

2. The retaining ring installation groove structure according to claim 1, characterized in that: The installation area is communicated with an end of the clearance area away from the open end.

3. The retaining ring installation groove structure according to claim 1, characterized in that: The annular groove is provided with a stop protrusion for limiting the circumferential direction of the retaining ring; And / or the stop protrusion is integrally formed with the sleeve.

4. The retaining ring installation groove structure according to claim 1, characterized in that: The sleeve also includes an integrally formed flange and / or bottom.

5. A molding die, characterized in that: The molding die is used to form a clearance area or a mounting area of ​​the retaining ring mounting groove structure according to any one of claims 1 to 4, and comprises: Concave die; A male mold, arranged opposite to the female mold along a first direction; A plurality of sliders are arranged along the circumferential direction of the die, each of the sliders is slidably arranged along the radial direction of the die at one end of the die close to the punch, and the slider is configured to be able to move along the radial direction of the die and fit the side wall of the sleeve; Wherein, the punch comprises a plurality of sub-punches arranged along the circumferential direction of the die, and a first gap for sleeve molding is formed between the sub-punches and the slider.

6. The molding die according to claim 5, characterized in that: A mold core is provided at one end of the male mold, and a plurality of inclined surface structures are provided at one end of the male mold close to the sub-male mold; An end of each sub-convex mold close to the center of the punch is provided with an inclined wedge structure facing the mold core, and each inclined surface structure of the mold core is arranged corresponding to the inclined wedge structure of each sub-convex mold; The mold core is configured to be able to move toward the sub-punches along a first direction and drive each of the sub-punches to move toward the corresponding slider along a radial direction of the die.

7. The molding die according to claim 5, characterized in that: Also includes: Upper die seat; A lower die base, molded with an upper die base along a first direction; An inclined block is arranged on the outer side of each of the sliders and can move along the first direction; the inclined block is connected to the upper die seat, and the inclined block is configured to drive the slider to move along the radial direction of the die and fit the side wall of the sleeve; And / or a pressing block, the pressing block and the sliding block are alternately arranged along the circumferential direction of the die, the pressing block is connected to the upper die seat, and the pressing block is configured to be able to follow the upper die seat to move toward the die along the first direction to press the flange surface of the sleeve.

8. A molding method, characterized in that: The steps include: A blank sleeve is provided, the blank sleeve comprises at least two clearance areas formed at intervals in a circumferential direction, the clearance areas are in a groove shape, one end of the clearance area extends to the end of the sleeve in an axial direction and forms an open end of the clearance area; The blank sleeve is placed in a second forming die, and a mounting area is formed at the other end of the air avoidance area away from the open end by the second forming die, and the mounting area and the air avoidance area are alternately arranged along the circumferential direction of the blank sleeve and circumferentially connected, and the connected mounting area and air avoidance area form an annular groove capable of installing and limiting a retaining ring.

9. The molding method according to claim 8, characterized in that: The step of providing a blank sleeve comprises: Providing a first blank, wherein the first blank is a sleeve structure or a sleeve structure with a bottom and / or a flange; The first blank is placed in a first forming die, and the first blank is formed into a blank sleeve by the first forming die.

10. The molding method according to claim 9, characterized in that: The step of placing the first blank into a first forming die and forming the first blank into a blank sleeve by the first forming die also includes: A stop protrusion is integrally formed at the clearance area portion in the annular groove by a first molding die.

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