Sliding fork boring fixture and sliding fork processing method

Abstract

The present application relates to the technical field of sliding fork processing, and in particular to a sliding fork boring fixture and a sliding fork processing method. The sliding fork boring fixture includes a workbench and a supporting member, a positioning member, a clamping member and a processing reference member arranged on the workbench. The processing reference member is detachably arranged on the supporting member for inserting the sliding fork blank. The clamping member is used to clamp the sliding fork blank and the processing reference member on the supporting member to limit the sliding fork blank and the processing reference member in the first direction, and the positioning member is used to contact a predetermined portion of the outer wall surface of the fork arm of the sliding fork blank to limit the sliding fork blank and the processing reference member in the second direction and the third direction. The above structure realizes the stable clamping and positioning of the sliding fork blank, ensures the verticality and horizontality, and converts the original processing reference using the internal spline as the processing reference to using the processing reference member as the processing reference. It is not affected by the nylon coating layer and has accurate positioning.

Description

Technical Field

[0001] The present application relates to the technical field of sliding fork processing, and in particular to a sliding fork boring fixture and a sliding fork processing method. Background Art

[0002] At present, the sliding fork is located in the middle of the drive shaft assembly. Its main functions are: 1. transmitting torque; 2. forming a sliding spline pair with the spline shaft fork to compensate for the length of the drive shaft assembly when the load of the whole vehicle is different.

[0003] In the traditional sliding fork processing technology, after the spline pulling process, the ear holes and groove cutting processes are directly carried out. This kind of sliding fork and the spline shaft fork form a sliding spline pair. This kind of sliding spline pair is in rigid contact, and the sliding fork is easy to wear, and has poor impact resistance and lubricity. Therefore, a new sliding fork processing technology is urgently needed, so that the produced sliding fork has better wear resistance, impact resistance and lubricity. In addition, a new positioning fixture is urgently needed for the sliding fork produced by the above-mentioned new processing method, so that the processing accuracy of the sliding fork is higher. Summary of the invention

[0004] The purpose of the present application is to provide a sliding fork boring fixture and a sliding fork processing method, which to a certain extent solves the technical problem in the prior art of urgently needing a new sliding fork processing method and a new positioning fixture involved in the processing method.

[0005] The present application provides a sliding fork boring fixture for clamping a sliding fork blank, the sliding fork boring fixture comprising: a workbench and a supporting member, a positioning member, a clamping member and a processing reference member arranged on the workbench;

[0006] Wherein, the machining reference member is detachably arranged on the supporting member, and the machining reference member is used to penetrate the sliding fork blank to serve as a reference for machining the sliding fork blank;

[0007] When the sliding fork blank is inserted into the processing reference member, the clamping member is used to clamp the sliding fork blank and the processing reference member on the supporting member to limit the sliding fork blank and the processing reference member in the first direction, and the positioning member is used to contact a predetermined position of the outer wall surface of the fork arm of the sliding fork blank to limit the sliding fork blank and the processing reference member in the second direction and the third direction.

[0008] In the above technical solution, further, the machining reference component includes a reference shaft and an external spline sleeve; wherein the external spline sleeve is sleeved on the outside of the reference shaft, the external spline sleeve is used to sleeve the sliding fork blank, and the external splines of the external spline sleeve are adapted to the internal splines of the sliding fork blank;

[0009] The external spline sleeve is coaxially arranged with the reference shaft; the reference shaft is detachably arranged on the supporting member, and an avoidance hole is formed on the reference shaft.

[0010] In any of the above technical solutions, further, the support member includes a first support member and a second support member that are spaced apart, the first support member is used to support one end of the reference shaft, and the second support member is used to support the other opposite end of the reference shaft.

[0011] In any of the above technical solutions, further, the first supporting member is formed with a first V-shaped groove, and the first groove is adapted to one end of the reference shaft; the second supporting member is formed with a second V-shaped groove, and the second groove is adapted to the other opposite end of the reference shaft.

[0012] In any of the above technical solutions, further, the positioning member includes a first positioning portion and a second positioning portion connected to each other; wherein the first positioning portion is formed with a V-shaped positioning groove, and the second positioning portion is formed with a limited inclined surface;

[0013] The fork arm comprises a first fork arm and a second fork arm formed with a fork hole, and when the sliding fork blank is clamped in the sliding fork boring fixture, a center line passing through the center of the fork hole of the first fork arm and the center of the fork hole of the second fork arm is arranged along the first direction, and an axis of the external spline sleeve is arranged along the second direction, and the first direction is perpendicular to the second direction;

[0014] The arcuate outer wall surface at the end of the first fork arm abuts against the opposite side walls of the positioning groove, and the arcuate outer wall surface at the end of the second fork arm abuts against the limiting inclined surface, so as to limit the first fork arm and the second fork arm in the second direction and the third direction respectively; the clamping member limits the shaft portion of the sliding fork blank in the first direction.

[0015] In any of the above technical solutions, further, a side wall surface of the V-shaped first groove and the limiting inclined surface are located in the same plane along the second direction.

[0016] In any of the above technical solutions, further, the clamping member is a hydraulic swivel cylinder formed with a pressure plate, and the pressure plate of the hydraulic swivel cylinder is provided with a flexible layer.

[0017] In any of the above technical solutions, further, the processing reference component is a rigid component.

[0018] The present application also provides a sliding fork processing method, comprising the following steps:

[0019] Step a, rough turning the shaft of the sliding fork blank and drilling the spline bottom hole;

[0020] Step b, spline the inner wall of the spline bottom hole;

[0021] Step c, finishing turning the shaft portion of the sliding fork blank;

[0022] Step d, milling two side ears on both sides of the sliding fork blank;

[0023] Step e, coating the spline;

[0024] Step f, performing spline shaping on the spline;

[0025] Step g, using a sliding fork boring fixture to clamp the sliding fork blank after the spline shaping process, and then boring the ear holes and cutting the retaining spring grooves;

[0026] Step h, removing the coating layer at the transition connection between the fork arm and the shaft of the sliding fork blank.

[0027] In any of the above technical solutions, further, step g includes: installing the sliding fork boring fixture on a workbench of a vertical machining center;

[0028] Assemble the coated and shaped sliding fork blank and the machining reference member of the sliding fork boring fixture together, and then place the two ends of the reference axis of the machining reference member in the first V-shaped groove of the first supporting member and the second V-shaped groove of the second supporting member of the sliding fork boring fixture respectively, and make the end of the first fork arm of the sliding fork blank abut against the side wall of the V-shaped positioning groove of the positioning member of the sliding fork boring fixture, and the end of the second fork arm of the sliding fork blank abut against the limiting inclined surface of the positioning member;

[0029] The outer circumferential surface of the sliding fork blank is pressed by the clamping member of the sliding fork boring fixture, and the ear holes and the retaining spring grooves are bored in sequence on the sliding fork blank.

[0030] Compared with the prior art, the beneficial effects of this application are:

[0031] The sliding fork boring fixture provided in the present application utilizes a clamping component and a positioning component to achieve stable clamping and positioning of the sliding fork blank, thereby ensuring verticality and horizontality. Furthermore, in the process of boring ear holes and cutting retaining ring grooves on the sliding fork blank in sequence, the original processing reference based on the internal spline is converted into a processing reference component based on a rigid processing reference, which is not affected by the nylon coating on the surface of the internal spline, and the positioning is more accurate and the precision is higher.

[0032] The sliding fork processing method provided in the present application produces a sliding fork whose internal spline has a nylon coating layer, so that it forms a flexible contact with the spline shaft, thereby improving wear resistance, impact resistance and lubricity. In addition, the produced workpiece has higher precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 A schematic diagram of the structure of a sliding fork boring fixture provided in an embodiment of the present application;

[0035] Figure 2 Another structural schematic diagram of the sliding fork boring fixture provided in an embodiment of the present application;

[0036] Figure 3 Another structural schematic diagram of the sliding fork boring fixture provided in an embodiment of the present application;

[0037] Figure 4 Another structural schematic diagram of the sliding fork boring fixture provided in an embodiment of the present application;

[0038] Figure 5 A schematic flow chart of a sliding fork processing method provided in an embodiment of the present application.

[0039] Reference numerals:

[0040] 1-workbench, 2-support member, 21-first support member, 211-first groove, 22-second support member, 221-second groove, 3-positioning member, 31-first positioning portion, 311-limiting groove, 32-second positioning portion, 321-limiting inclined surface, 4-clamping member, 41-pressing plate, 5-machining reference member, 51-reference shaft, 511-avoidance portion, 512-avoidance hole, 52-external spline sleeve, 6-second fastener, 7-third fastener, 8-sliding fork blank, 81-shaft portion, 82-fork arm, 821-first fork arm, 822-second fork arm, 83-transition connection, a-first direction, b-second direction, c-third direction. DETAILED DESCRIPTION

[0041] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0042] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents the selected embodiments of the present application.

[0043] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0044] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0045] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] Refer to the following Figures 1 to 5 The present invention describes a sliding fork boring fixture and a sliding fork processing method according to some embodiments of the present application.

[0047] Embodiment 1

[0048] See also Figures 1 to 4 As shown, the embodiment of the present application provides a sliding fork boring fixture, which is used to clamp a sliding fork blank 8, wherein the sliding fork blank 8 includes a shaft portion 81 and a fork arm 82 connected to each other, and the sliding fork boring fixture includes: a workbench 1 and a supporting member 2, a positioning member 3, a clamping member 4 and a processing reference member 5 arranged on the workbench 1;

[0049] Among them, the positioning member 3 and the clamping member 4 are a group of positioning and clamping components, and there are two groups in total. Of course, it is not limited to the two groups in this embodiment, and other numbers can also be selected according to actual needs;

[0050] The machining reference member 5 is detachably arranged on the supporting member 2, and the machining reference member 5 is used to penetrate the sliding fork blank 8 to serve as a reference for machining the sliding fork blank 8;

[0051] When the sliding fork blank 8 is inserted into the processing reference member 5, the clamping member 4 is used to clamp the sliding fork blank 8 and the processing reference member 5 on the supporting member 2 to limit the sliding fork blank 8 and the processing reference member 5 in the first direction a, and the positioning member 3 is used to resist the arc-shaped wall surface of the fork arm 82 of the sliding fork blank 8 to limit the sliding fork blank 8 and the processing reference member 5 in the second direction b and the third direction c, thereby adjusting the verticality and horizontality of the processing reference member 5 and the sliding fork blank 8, thereby improving the accuracy of subsequent machining.

[0052] In addition, the sliding fork boring fixture provided in the present embodiment is particularly used in a sliding fork processing method described below. Since the spline coating processing step is added in the present sliding fork processing method, the internal spline of the produced sliding fork blank 8 is coated with a nylon coating layer, which is elastic and easily deformed under pressure or vibration. If in the later machining process, the previous jig is used, that is, the previous jig is only used to simply clamp and fix the sliding fork blank 8, and the internal spline of the sliding fork blank 8 is used as the machining reference for machining, the internal spline of the sliding fork blank 8 is easily subjected to pressure and vibration, which makes it difficult to ensure the machining accuracy.

[0053] In this embodiment, preferably, Figure 3 As shown, the machining reference component 5 includes a reference shaft 51 and an external spline sleeve 52; wherein the external spline sleeve 52 is sleeved on the outside of the reference shaft 51, and the external spline sleeve 52 is used to sleeve the sliding fork blank 8, and the external spline of the external spline sleeve 52 is adapted to the internal spline of the sliding fork blank 8;

[0054] The external spline sleeve 52 is coaxially arranged with the reference shaft 51 ; the reference shaft 51 is detachably arranged on the supporting member 2 , and the reference shaft 51 is formed with an avoidance hole 512 , specifically, the reference shaft 51 is formed with an avoidance portion 511 , and the avoidance portion 511 is formed with an avoidance hole 512 .

[0055] According to the structure described above, when the sliding fork blank 8 is assembled with the processing reference component 5, the sliding fork blank 8 is sleeved on the outside of the external spline sleeve 52, and the axis of the fork arm 82 of the sliding fork blank 8 coincides with the axis of the avoidance hole 512, that is, the assembly of the sliding fork blank 8 and the processing reference component 5 is completed to form an assembly part, and the above-mentioned assembly part is installed on the support component 2, wherein the specific structure of the support component 2 will be described as follows.

[0056] In this embodiment, preferably, Figure 1 and Figure 2As shown, the support member 2 includes a first support member 21 and a second support member 22 which are arranged at intervals. The first support member 21 is used to support one end of the reference shaft 51, and the second support member 22 is used to support the other end opposite to the reference shaft 51. In an embodiment, the first support member 21 and the second support member 22 can be formed in a plate shape;

[0057] The first support member 21 is formed with a V-shaped first groove 211, and the first groove 211 is adapted to one end of the reference shaft 51; the second support member 22 is formed with a V-shaped second groove 221, and the second groove 221 is adapted to the other end opposite to the reference shaft 51. The bottom of the V-shaped first groove 211 and the bottom of the V-shaped second groove 221 are both formed with a backing groove.

[0058] According to the structure described above, one end of the reference shaft 51 of the processing reference member 5 is clamped in the first groove 211 of the first support member 21, and the other end of the reference shaft 51 is clamped in the second groove 221 of the second support member 22, and the clamping member 4, such as the pressing plate 41 of the hydraulic swivel cylinder (i.e., the pressing plate 41 forms the part of the clamping member 4) is pressed on the outer circular wall surface of the shaft portion 81 coated with the nylon coating layer of the sliding fork blank 8, thereby realizing the initial positioning of the sliding fork blank 8 and the processing reference member 5. It should be noted here that the pressing plate 41 is provided with a flexible layer on one side facing the sliding fork blank 8, which plays a role in protecting the nylon coating layer.

[0059] In this embodiment, preferably, Figure 4 As shown, the positioning member 3 includes a first positioning portion 31 and a second positioning portion 32 connected to each other; wherein the first positioning portion 31 is formed with a V-shaped limiting groove 311, and the bottom of the V-shaped limiting groove 311 is also formed with a backing groove, and the second positioning portion 32 is formed with a limiting inclined surface 321;

[0060] The fork arm 82 includes a first fork arm 821 and a second fork arm 822. When the sliding fork blank 8 is clamped in the sliding fork boring fixture, the center line passing through the center of the fork hole of the first fork arm 821 and the center of the fork hole of the second fork arm 822 is set along the first direction a, and the axis of the external spline shaft sleeve 52 is set along the second direction b. The first direction a is perpendicular to the second direction b, and the third direction c is perpendicular to the first direction a and the second direction b respectively; a side wall surface of the V-shaped limiting groove 311 and the limiting inclined surface 321 are located in the same plane along the first direction a, which is convenient for processing and manufacturing, and the corresponding positions of the two fork arms 82 are limited, and the limiting effect is better;

[0061] When the sliding fork blank 8 is clamped in the sliding fork boring fixture, the arcuate outer wall surface of the end of the first fork arm 821 abuts against the opposite side walls of the limiting groove 311 , and the arcuate outer wall surface of the end of the second fork arm 822 abuts against the limiting inclined surface 321 .

[0062] According to the structure described above, when the above-mentioned assembly is installed on the supporting member 2 and the workbench 1 is in a horizontal plane, the first direction a is the vertical direction, and the second direction b and the third direction c are both horizontal directions, that is, the center line passing through the center of the fork hole of the first fork arm 821 and the center of the fork hole of the second fork arm 822 is set along the vertical direction (that is, the first direction a), that is, the axis of the external spline sleeve 52 is along the second direction b, in the vertical direction, the first limiting groove 311 of the positioning member 3 limits the first fork arm 821 in the horizontal direction (that is, the second direction b and the third direction c), and the second limiting groove 311 of the positioning member 3 limits the second fork arm 822 in the horizontal direction, and at the same time, the clamping member 4 limits the shaft portion 81 of the sliding fork blank 8 in the first direction a, so that the assembly can be stably fixed to the supporting member 2, that is, the final positioning is completed.

[0063] In this embodiment, preferably, Figure 1 As shown, the clamping member 4 is a hydraulic angle cylinder, which can be purchased from the market and is equipped with a pressure plate 41. For example, a pressure plate 41 is equipped on the top of the clamping member 4 to facilitate pressing on the outer wall surface of the shaft portion 81 of the sliding fork blank 8, especially the outer wall surface of the shaft portion 81 coated with a nylon coating layer, so as to limit the sliding fork blank 8 in the first direction a.

[0064] In this embodiment, preferably, Figure 1 and Figure 2 As shown, the positioning member 3 is connected to the supporting member 2 through the second fastener 6. Specifically, the first positioning portion 31 of the positioning member 3 and the supporting member 2 are detachably connected through the second fastener 6, which is convenient for later debugging and maintenance.

[0065] The clamping member 4 is connected to the workbench 1 through the third fastener 7, and the supporting member 2 is connected to the workbench 1 through the first fastener (not shown in the figure), which also has the above-mentioned beneficial technical effect, that is, a detachable connection is achieved through the fastener, which is convenient for later debugging and maintenance.

[0066] In this embodiment, preferably, the processing reference component 5 is a rigid component, and in particular can be made of GCr15 bearing steel. The surface of the processing reference component 5 is ground to a roughness Ra≤0.4 to ensure that after it is matched with the sliding fork blank 8, the coating layer of the sliding fork blank 8 is not damaged, and the shape and position tolerances of the ear hole are guaranteed, thereby ensuring the processing accuracy.

[0067] Embodiment 2

[0068] See also Figure 1 As shown, an embodiment of the present application also provides a sliding fork processing method, comprising the following steps:

[0069] Step a, rough turning the shaft portion 81 of the sliding fork blank 8 and drilling the spline bottom hole;

[0070] Step b, spline the inner wall of the spline bottom hole;

[0071] Step c, finishing turning the shaft portion 81 of the sliding fork blank 8;

[0072] Step d, milling the side surfaces of the two ears on both sides of the sliding fork blank 8;

[0073] Step e, coating the spline;

[0074] Step f, performing spline shaping on the spline;

[0075] Step g, using a sliding fork blank 8 boring fixture to clamp the sliding fork blank 8 after the spline shaping process, and then boring the ear holes and cutting the retaining spring grooves;

[0076] Step h: remove the coating layer on the outer wall surface of the transition connection 83 between the fork arm 82 and the shaft portion 81 of the sliding fork blank 8 by lathing.

[0077] It can be seen that the inner spline of the produced sliding fork has a nylon coating layer, which makes it form a flexible contact with the spline shaft, improves wear resistance, impact resistance and lubricity. In addition, the produced workpiece is clamped and positioned using the sliding fork boring fixture when boring ear holes and cutting retaining ring grooves, and the produced workpiece has higher precision, which will be specifically introduced below.

[0078] In step h, the coating layer on the outer wall surface of the transition connection 83 between the fork arm 82 and the shaft 81 of the sliding fork blank 8 is removed, that is, a position for welding the balancing plate is reserved to ensure dynamic balance.

[0079] In this embodiment, preferably, in step e, the sliding fork blank 8 after the splines are drawn is heated by an induction coil, and then immersed in a fluidized box filled with nylon powder suspension for a certain period of time, so that the nylon powder is evenly attached to the outer surface of the shaft 81 of the sliding fork blank 8 and the surface of the inner spline to form a nylon coating layer with a thickness of 0.35-0.50 mm. Of course, it is not limited to this, and a nylon coating layer of a preset thickness can also be applied according to actual needs.

[0080] Since the surface of the inner spline is formed with a nylon coating layer, it forms a flexible contact with the spline shaft, thereby improving the wear resistance, impact resistance and lubricity.

[0081] In this embodiment, preferably, in step f, the coated sliding fork blank 8 is placed on a positioning sleeve of a vertical broaching machine, and a shaping broach is used to trim the internal splines of the sliding fork blank 8 so that the nylon coating layer on the surface of the internal splines is uniform to 0.2-0.3 mm, and the tooth shape meets the German standard DIN5480.

[0082] In this embodiment, preferably, Figures 1 to 4 As shown, step g includes: installing the sliding fork boring fixture on the vertical machining center workbench 1;

[0083] Assemble the coated and shaped sliding fork blank 8 and the processing reference member 5 of the sliding fork boring fixture together, and then place the two ends of the reference axis 51 of the processing reference member 5 in the V-shaped first groove 211 of the first support member 21 of the sliding fork boring fixture and in the V-shaped second groove 221 of the second support member 22, respectively, and make the end of the first fork arm 821 of the sliding fork blank 8 abut against the side wall of the V-shaped limiting groove 311 of the positioning member 3 of the sliding fork boring fixture, and the end of the second fork arm 822 of the sliding fork blank 8 abut against the limiting inclined surface 321 of the positioning member 3, so that the processing reference member 5 and the sliding fork blank 8 are stably positioned on the support member 2;

[0084] The clamping member 4 of the sliding fork boring fixture is then used to press the outer circumference of the shaft 81 of the sliding fork blank 8. The above clamping and positioning ensure verticality and horizontality. The sliding fork blank 8 is subjected to machining operations of boring ear holes and cutting retaining ring grooves in sequence. In the above machining process, the original internal spline as the machining reference is converted to a rigid machining reference member 5 as the machining reference, which is not affected by the nylon coating layer on the surface of the internal spline, and the positioning is more accurate and the precision is higher. Among them, the clamping member 4 is provided with a flexible protective layer, so that when it cooperates with the outer wall surface of the shaft 81 of the sliding fork blank 8, it protects the coating layer on the outer wall surface of the shaft 81.

[0085] In addition, after processing, the verticality of the ear hole of the sliding fork blank 8 relative to the internal spline after coating is ≤0.05mm, the symmetry is ≤0.2mm, and the symmetry of the earring groove relative to the spline after coating is ≤0.2mm.

[0086] In summary, the sliding fork processing method of the present application has the following advantages:

[0087] 1. The internal splines of the sliding fork are coated and shaped to effectively improve the lubrication performance of the sliding pair, reduce wear, and extend the service life of the drive shaft; the nylon coating layer has a good shock-absorbing effect, reduces the noise generated during driving, and greatly improves the comfort of the entire vehicle.

[0088] 2. After the sliding fork blank 8 with a nylon coating is clamped by the fixture of the present application and processed by boring ear holes and cutting grooves, the processing reference is converted from the internal spline of the original sliding fork blank 8 to the processing reference component 5. The processed product has higher precision. The verticality of the ear hole of the sliding fork blank 8 relative to the internal spline after coating is detected to be ≤0.05mm, and the symmetry is ≤0.2mm. The symmetry of the earring groove relative to the internal spline after coating is ≤0.2mm, which fully meets the product requirements and improves the overall precision of the drive shaft assembly.

[0089] 3. The fixture involved in the process is different from the traditional sliding fork boring fixture. The traditional sliding fork blank 8 is not nylon coated, so there are many choices for fixture positioning methods, and there is no need to consider the elasticity and protection of the coating. The fixture involved in the processing method described in this application can be used to clamp and position the sliding fork blank 8 with a nylon coating layer, and can ensure the shape and position tolerance processing accuracy of the ear hole of the sliding fork blank 8 relative to the internal spline reference.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A sliding fork boring fixture for clamping a sliding fork blank, characterized in that: include: A workbench and a supporting member, a positioning member, a clamping member and a processing reference member arranged on the workbench; Wherein, the machining reference member is detachably arranged on the supporting member, and the machining reference member is used to penetrate the sliding fork blank to serve as a reference for machining the sliding fork blank; In a state where the sliding fork blank is inserted into the processing reference member, the clamping member is used to clamp the sliding fork blank and the processing reference member on the supporting member to limit the sliding fork blank and the processing reference member in the first direction, and the positioning member is used to abut against a predetermined portion of the outer wall surface of the fork arm of the sliding fork blank to limit the sliding fork blank and the processing reference member in the second direction and the third direction; The machining reference component comprises a reference shaft and an external spline sleeve; wherein the external spline sleeve is sleeved on the outside of the reference shaft, the external spline sleeve is used to sleeve the sliding fork blank, and the external splines of the external spline sleeve are adapted to the internal splines of the sliding fork blank; The external spline sleeve is coaxially arranged with the reference shaft; the reference shaft is detachably arranged on the support member, and the reference shaft is formed with an avoidance hole; the support member comprises a first support member and a second support member arranged at intervals, the first support member is used to support one end of the reference shaft, and the second support member is used to support the other end opposite to the reference shaft; The positioning member includes a first positioning portion and a second positioning portion connected to each other; wherein the first positioning portion is formed with a V-shaped positioning groove, and the second positioning portion is formed with a limited inclined surface.

2. The sliding fork boring fixture according to claim 1, characterized in that: The first supporting member is formed with a first V-shaped groove, and the first groove is matched with one end of the reference shaft; the second supporting member is formed with a second V-shaped groove, and the second groove is matched with the other opposite end of the reference shaft.

3. The sliding fork boring fixture according to claim 1, characterized in that: The fork arm comprises a first fork arm and a second fork arm formed with a fork hole, and when the sliding fork blank is clamped in the sliding fork boring fixture, a center line passing through the center of the fork hole of the first fork arm and the center of the fork hole of the second fork arm is arranged along the first direction, and an axis of the external spline sleeve is arranged along the second direction, and the first direction is perpendicular to the second direction; The arcuate outer wall surface at the end of the first fork arm abuts against the opposite side walls of the positioning groove, and the arcuate outer wall surface at the end of the second fork arm abuts against the limiting inclined surface, so as to limit the first fork arm and the second fork arm in the second direction and the third direction respectively; the clamping member limits the shaft portion of the sliding fork blank in the first direction.

4. The sliding fork boring fixture according to claim 3, characterized in that: A side wall surface of the V-shaped first groove and the limiting inclined surface are located in the same plane along the first direction.

5. The sliding fork boring fixture according to any one of claims 1 to 4, characterized in that: The clamping member is a hydraulic swing cylinder formed with a pressure plate, and the pressure plate of the hydraulic swing cylinder is provided with a flexible layer.

6. The sliding fork boring fixture according to any one of claims 1 to 4, characterized in that: The processing reference component is a rigid component.

7. A sliding fork processing method, characterized in that: The following steps are involved: Step a, rough turning the shaft of the sliding fork blank and drilling the spline bottom hole; Step b, spline the inner wall of the spline bottom hole; Step c, finishing turning the shaft portion of the sliding fork blank; Step d, milling two side ears on both sides of the sliding fork blank; Step e, coating the spline; Step f, performing spline shaping on the spline; Step g, using a sliding fork boring fixture to clamp the sliding fork blank after the spline shaping process, and then boring the ear holes and cutting the retaining spring grooves; Step h, removing the coating layer at the transition connection between the fork arm and the shaft of the sliding fork blank; Step g includes: installing the sliding fork boring fixture on the workbench of the vertical machining center; Assemble the coated and shaped sliding fork blank and the machining reference member of the sliding fork boring fixture together, and then place the two ends of the reference axis of the machining reference member in the first V-shaped groove of the first supporting member and the second V-shaped groove of the second supporting member of the sliding fork boring fixture respectively, and make the end of the first fork arm of the sliding fork blank abut against the side wall of the V-shaped positioning groove of the positioning member of the sliding fork boring fixture, and the end of the second fork arm of the sliding fork blank abut against the limiting inclined surface of the positioning member; The outer circumferential surface of the sliding fork blank is pressed by the clamping member of the sliding fork boring fixture, and the ear holes and the retaining spring grooves are bored in sequence on the sliding fork blank.

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