Linear cutting machining clamp for multiple narrow grooves of connecting sleeve

Abstract

The utility model provides a linear cutting machining clamp for multiple narrow grooves of a connecting sleeve. The support is installed on a working table of a machine tool. The mandrel is a step shaft and penetrates through the support to be rotatably installed, and the large end of the mandrel is attached to one end of the support. And the nut axially limits the mandrel at the other end of the support. The bottom wall of the pressing sleeve penetrates through the small end of the part to be attached to the thin step of the large end of the part, the cylinder wall is screwed on the mandrel, and the part is pressed to the end face of the small end of the mandrel. A plurality of station holes are formed in the end face, making contact with the large end of the mandrel, of the support and correspond to machining of a plurality of equally-divided narrow grooves of parts respectively. The plug pin assembly circumferentially limits the mandrel relative to the support through the corresponding station hole. The clamping device is simple in structure, a connecting sleeve type part with a thin step at the large end and a plurality of equally-divided narrow grooves needing to be machined at the small end is reliably clamped through the combined action of the pressing sleeve and the mandrel, and it can be guaranteed that the part is safely pressed on the clamping device; by arranging the station holes corresponding to the processing of the plurality of equally-divided narrow grooves on the support, the precise indexing processing of the narrow grooves can be realized.

Description

Technical Field

[0001] This utility model belongs to the field of wire EDM machining fixture technology, specifically relating to a wire EDM machining fixture for connecting multiple narrow slots. Background Technology

[0002] like Figure 11 The image shows a connecting sleeve part used for connecting shafts of micro-miniature motors. Its structure is a hollow, multi-stepped shaft, with the steps near the large end being relatively thin, approximately 0.8 mm. A deep, four-part narrow groove is formed at one end of each small step. In the production of this type of part, after the hollow stepped shaft is manufactured, the multi-part narrow groove at the small end needs to be machined. Existing methods for machining the narrow grooves in connecting sleeves involve using an indexing mechanism on a milling machine or CNC milling equipment. A shallow step is pre-bored at the end of the three jaws of the indexing mechanism. This shallow step is used to clamp the outer circumference of the large end of the connecting sleeve. Then, a thin saw blade is used in conjunction with the indexing mechanism to rotate and feed, completing the machining of the multi-part narrow groove. The disadvantages of this method are: the processing is complicated and inefficient, and the clamping surface of the part is relatively short (the effective clamping cylindrical surface length is about 0.6 to 0.8 mm). The clamping force is not easy to control. In addition, the resistance of deep and narrow groove milling is large. When the clamping force is too large, the circumference of the large end of the connecting sleeve is easily damaged. When the clamping force is insufficient, the connecting sleeve is easily thrown out during the cutting force, which is unsafe. Utility Model Content

[0003] To address the problems of low processing efficiency and inability to safely clamp parts in the processing of multiple narrow slots in the existing technology, the applicant of this application conceived of changing the narrow slot processing to be done by wire cutting equipment. However, the existing wire cutting equipment uses a pressure plate and "V"-shaped tooling to clamp the workpiece, which cannot reliably clamp the connecting sleeve workpiece and complete the precision indexing processing.

[0004] Therefore, in order to further solve the problem that the workpiece cannot be reliably clamped and precision indexing cannot be completed when the connecting sleeve has multiple narrow slots using wire EDM, this utility model provides a wire EDM fixture for connecting sleeves with multiple narrow slots.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] This utility model provides a wire EDM machining fixture for connecting multiple narrow slots, including a support, a mandrel, a nut, a pressure sleeve, and a pin assembly;

[0007] The support is used for mounting on the worktable of the wire cutting machine.

[0008] The mandrel is a stepped shaft and is rotatably mounted through the support. The large end of the mandrel fits into one end of the support, and the small end of the mandrel is used to install the connecting sleeve part to be processed.

[0009] The nut is screwed on the mandrel at the other end of the support to axially limit the mandrel;

[0010] The bottom wall of the compression sleeve is attached to the thin step of the large end of the part through the small end of the part, and the cylinder wall is screwed on the mandrel, so that the part to be processed is pressed tightly to the small end surface of the mandrel.

[0011] The end surface of the support in contact with the large end of the mandrel is provided with a plurality of work position holes coaxial with the mandrel, and the work position holes correspond to the machining of a plurality of equal narrow grooves of the part respectively.

[0012] Further, the clamp further comprises knurled screws for fixedly connecting to the large end of the mandrel to drive the mandrel to rotate.

[0013] Further, the plug-in assembly comprises a plug-in pin, the large end of the mandrel is axially machined with a stepped hole, and the large hole in the stepped hole faces the support; the plug-in pin is installed through the stepped hole of the mandrel, and one end is used for inserting into the work position hole on the support, the middle part is provided with a radially outwardly protruding boss, the boss can abut on the stepped surface of the stepped hole, and the other end is used for extending out of the mandrel.

[0014] Further, the plug-in assembly further comprises a plug-in cap and a fixed pin; the plug-in cap is used for connecting to the end of the plug-in pin extending out of the mandrel; and the fixed pin is used for radially penetrating the plug-in cap and the plug-in pin to fixedly connect the plug-in cap to the plug-in pin.

[0015] Further, the clamp further comprises a bearing and an end cover, the bearing is sleeved on the mandrel in the support, and the end cover is fixedly connected to the support between the nut and the support; the outer ring of the bearing is limited by the end cover and the step of the support at both ends respectively.

[0016] Further, the inner ring of the bearing is limited by the elastic retainer and the shaft shoulder retainer at both sides respectively.

[0017] Further, the outer periphery of the compression sleeve is machined with a sawtooth structure, and two symmetrical planes are machined for the wrench to hold.

[0018] Further, the large end of the mandrel is machined with a line on the outer peripheral surface, and the support is provided with a line corresponding to the work position hole on the outer surface.

[0019] The advantages of the utility model are:

[0020] 1. The wire cutting machining clamp for the multiple narrow slots of the coupling sleeve of the utility model, the support can be installed on the workbench of the wire cutting machine, the mandrel of the stepped shaft can rotate through the support and is limited axially by the nut, the small end of the mandrel is fixed with the coupling sleeve part to be machined by the pressing sleeve, the pressing sleeve can press the large end thin step of the part to the end face of the mandrel, the large end of the mandrel is attached to the support, and a plurality of station holes corresponding to the machining of the multiple equidivided narrow slots on the part are arranged on the attached end face of the support, the switching of the station holes can be realized by the rotation of the mandrel relative to the support, so that the wire cutting of the multiple narrow slots on the coupling sleeve part is realized. Therefore, the utility model has simple structure, the coupling sleeve part with the hollow multiple stepped shaft, the large end step is thin, and the small end needs to be machined with multiple equidivided narrow slots can be reliably clamped by the joint action of the pressing sleeve and the mandrel, the part can be quickly and accurately positioned on the clamp, is safely pressed, and needs not to be repeatedly aligned; meanwhile, the station holes corresponding to the machining of the multiple equidivided narrow slots on the small end of the part are arranged on the support, so that the precise indexing machining of the narrow slots can be realized.

[0021] 2. The lug in the middle part of the mandrel for limiting the mandrel relative to the support in the circumferential direction has a boss, so that the lug can move in the axial direction in the stepped hole of the large end of the mandrel and cannot be separated from the mandrel, the selection and switching of the station holes are facilitated, and the part machining efficiency is improved.

[0022] 3. The joint action of the lug cap and the lug makes the lug not fall out of the large hole side of the stepped hole of the mandrel when the large end of the mandrel is not attached to the support, the assembly of the mandrel is facilitated, and the installation efficiency of the clamp is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and / or other features and advantages of the utility model will become more apparent by describing in following with reference to the accompanying drawings, the drawings are not drawn to scale, and some features are enlarged or reduced to show the details of specific parts, in the drawings:

[0024] Figure 1 It is the perspective view of the wire cutting machining clamp for the multiple narrow slots of the coupling sleeve of the utility model in use;

[0025] Figure 2 It is the sectional view of the wire cutting machining clamp for the multiple narrow slots of the coupling sleeve of the utility model in use;

[0026] Figure 3 It is the exploded perspective view of the wire cutting machining clamp for the multiple narrow slots of the coupling sleeve of the utility model;

[0027] Figure 4 It is the perspective view of the support in the utility model;

[0028] Figure 5 It is the sectional perspective view of the support in the utility model;

[0029] Figure 6is a perspective view of the central shaft of the utility model;

[0030] Figure 7 is a perspective view of the pressure sleeve of the utility model;

[0031] Figure 8 is a perspective view of the bolt assembly of the utility model;

[0032] Figure 9 is a perspective view of the bolt of the utility model;

[0033] Figure 10 is a perspective view of the bolt cap of the utility model;

[0034] Figure 11 is a perspective view of the coupling sleeve part.

[0035] In the figure: 1 - support, 11 - bottom plate, 111 - U-shaped groove, 12 - mounting seat, 121 - threaded hole, 122 - work position hole; 2 - spindle, 21 - stepped hole, 22 - mounting hole; 3 - nut, 31 - gasket; 4 - pressure sleeve, 41 - bottom wall, 42 - cylinder wall, 43 - flat surface; 5 - bolt assembly, 51 - bolt, 511 - boss, 512 - pin hole of the bolt, 52 - bolt cap, 521 - pin hole of the bolt cap, 53 - fixing pin; 6 - bearing, 7 - end cover, 71 - screw, 8 - elastic retainer; 9 - shoulder retainer; 10 - knurled screw, 101 - spring washer; 1000 - part to be machined. DETAILED DESCRIPTION

[0036] The utility model will be described in detail below by means of the example embodiment of the utility model with reference to the drawings. It should be pointed out that the following detailed description of the utility model is only for the purpose of illustration, and not for limiting the utility model.

[0037] It should be pointed out that in the context of the utility model, the orientation or position relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise" and "counterclockwise" is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model in indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation.

[0038] In addition, terms such as "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features.

[0039] The utility model provides a kind of for the line cutting machining fixture of multiple narrow slots of coupling sleeve, the fixture can be clamped to coupling sleeve class parts of hollow multiple step shaft and large end step thin, small end needs to be processed multiple equal narrow slots, to line cutting multiple narrow slots, the fixture can reliably clamp workpiece, and realize precision indexing processing.

[0040] First overall reference Figures 1 to 3 As the line cutting machining fixture for multiple narrow slots of coupling sleeve of the utility model exemplary embodiment includes support 1, mandrel 2, nut 3, press sleeve 4 and bolt assembly 5. Support 1 is used to install on the worktable surface of line cutting machine tool;Mandrel 2 can be realized the installation of the part to be processed 1000 on one hand, on the other hand can be rotated relative to support, to realize the indexing of multiple narrow slots on the part to be processed 1000;Nut 3 is used to limit the axial position of mandrel 2 relative to support 1;Press sleeve 4 can press the part to be processed 1000 to mandrel 2, to realize the clamping of fixture to workpiece;Bolt assembly 5 is used to limit the circumferential position of mandrel 2 relative to support 1 when mandrel 2 is rotated to corresponding narrow slot processing station relative to support 1.

[0041] Combined Figure 4 And Figure 5 Support 1 can include bottom plate 11 and mounting seat 12, bottom plate 11 is used to install to machine tool worktable, mounting seat 12 is used to install and fixed mandrel 2. In particular, bottom plate 11 can be cuboid, and U-shaped groove 111 can be set on both sides respectively, so as to be connected on machine tool worktable by bolt and nut. The lower part of mounting seat 12 can be square, and the upper part can be semicylindrical, and step through hole is further set along the column surface axis, and the tail end of the hole with step in the hole is directed to the outside of machine tool, and the larger hole in the step hole can accommodate bearing 6 described below, and the hole diameter is the same as the size of bearing outer ring, and is interference fit. The smaller hole in the step through hole is located at the large end side of the mandrel, and the end face of the small end side of the through hole is provided with multiple station holes 122 coaxial with the step through hole, and the station holes 122 correspond to the processing of multiple equal narrow slots of the part respectively, and are used to insert bolt assembly 5, specifically bolt 51 described below. The end face of the large end side of the through hole is uniformly provided with multiple threaded holes 121, which are used to connect end cover 7 described below.

[0042] To realize the processing of four equal narrow slots and six equal narrow slots on coupling sleeve part, two holes in station hole 122 and the hole center of support 1 form 90° angle, and three holes and the hole center of support 1 form 60° angle, which correspond to the station when coupling sleeve processes four equal slots and six equal slots respectively. More station holes with different angle positions can also be made on the end face of the tail part of support, to meet the requirements of different angle cutting type processing of parts.

[0043] Combined Figure 6The mandrel 2 is a stepped shaft and is rotatably mounted through the support 1. The large end of the mandrel 2 is in contact with one end of the support 1, that is, the end face of the support 1 provided with the work position hole 122 is in contact with the large end of the mandrel 2. The large end is axially processed with a stepped hole 21 for connecting the latch assembly 5, and the large hole in the stepped hole 21 faces the support 1. The large end is also provided with a mounting hole 22 for connecting the knurled screw 10, which will be described in detail later. The small end of the mandrel 2 is used to mount the coupling sleeve part 1000 to be processed and extends to the cutting work area. The small end is also coaxially provided with a cylindrical protrusion for sleeving the coupling sleeve to be processed. The middle and small end of the mandrel 2 are each processed with a thread. The thread at the middle is used to cooperate with the nut 3, and the thread at the small end is used to cooperate with the thread on the sleeve 4 which will be described in detail below.

[0044] The nut 3 is screwed on the mandrel 2 at the other end of the support 1, that is, on the threaded part at the middle of the mandrel, to axially position the mandrel 2. A gasket 31 can also be used to prevent the nut 3 from loosening and to distribute the pressure.

[0045] In combination Figure 7 The sleeve 4 is a bottomed cylinder for coaxially connecting the part 1000 to be processed to the small end of the mandrel 2. The bottom wall 41 of the sleeve 4 is in contact with the small end of the part to be processed and the large end of the part is thin. The cylinder wall 42 is screwed on the thread at the small end of the mandrel 2, so as to press the part 1000 to be processed to the small end face of the mandrel 2, thereby realizing the clamping of the part by the clamp. In this way, through the cooperation of the sleeve 4 and the mandrel 2, the part 1000 to be processed can be quickly and accurately positioned on the clamp, safely pressed, and there is no need to repeat the positioning. In addition, by changing the diameter size of the cylindrical surface of the small end of the mandrel and the size of the sleeve, the equal division groove machining of coupling sleeve parts of various size specifications can be satisfied, and the versatility is strong.

[0046] Preferably, in order to facilitate the taking of the sleeve 4, a sawtooth structure is processed on the outer periphery of the sleeve 4. In addition, in order to facilitate the clamping of the sleeve by a wrench to apply a torsional force to it, the outer periphery of the sleeve 4 can be processed with two symmetrical planes 43, and the distance between the two planes is consistent with the size specification of a universal wrench.

[0047] The latch assembly 5 is used to circumferentially position the mandrel 2 relative to the support 1 through the corresponding work position hole 122 when the mandrel 2 is rotated to the position of the corresponding work position hole 122 to machine the corresponding narrow groove. In this regard, the large end of the mandrel can be processed with a line on the outer peripheral surface, and correspondingly, the support 1 can be provided with a line corresponding to the work position hole 122 on the outer surface, specifically the outer circumferential surface and the end face. When the mandrel 2 is rotated to the corresponding work position hole, the line can provide auxiliary reference, thereby facilitating the determination of the position of the mandrel.

[0048] As Figures 8 to 10As shown, in some embodiments, the latch assembly 5 only includes a latch 51, which is a three-step column, with the middle column face having a larger diameter than the two end column faces. The latch 51 is installed through the stepped hole 21 of the mandrel 2, with one end inserted into the workpiece hole 122 on the support 1, the middle part is provided with a radially outwardly protruding boss 511, which can abut against the stepped face of the stepped hole 21, and the other end is used to extend out of the mandrel 2. In this way, in use, the clamp can ensure that the latch 51 can move axially in the stepped hole of the large end of the mandrel and will not fall out of the mandrel, facilitating the selection and switching of the workpiece hole, thereby improving the efficiency of part machining.

[0049] Further, in order to prevent the latch 51 from falling out of the large hole side of the stepped hole of the mandrel when the large end of the mandrel is not in contact with the support, that is, when the mandrel is not assembled to the support during the assembly process of the clamp, the latch assembly 5 further includes a latch cap 52 and a fixing pin 53. The latch cap 52 can be a hollow column, which is connected to the end of the latch 51 extending out of the mandrel 2, and the latch 51 is processed with a radial pin hole 512 at this end, and the latch cap 52 is processed with a pin hole 521 radially, and the fixing pin 53 is used to pass through the pin hole 521 on the latch cap 52 and the pin hole 512 on the latch 51 radially to fix the latch cap 52 to the latch 51. This structure also allows the latch cap 52 to be gripped to operate when the latch assembly 5 is inserted and pulled out of the support 1, which is particularly advantageous when the size of the latch 52 is small, and can further improve the installation efficiency of the clamp, thereby improving the efficiency of part machining.

[0050] Referring back to Figures 1 to 3 In order to facilitate the rotation of the mandrel relative to the support, the wire cutting machining clamp of the utility model can further include a knurled screw 10, which is fixed to the mounting hole 22 at the large end of the mandrel 2 to drive the mandrel 2 to rotate around the axis, and at the same time drive the latch assembly 5 to rotate to the corresponding workpiece hole 122 opened at the tail end face of the support 1, so as to facilitate the insertion of the latch 51 into the workpiece hole. In operation, the knurls outside the screw can be gripped, and thus a rotating force is applied to the mandrel 2. In addition, a spring washer 101 can be used to strengthen the connection between the knurled screw 10 and the mandrel 2.

[0051] In order to make the mandrel 2 rotate smoothly relative to the support 1, the rotatable connection of the mandrel 2 in the support 1 is realized by using a bearing, for this purpose, the clamp further comprises a bearing 6 and an end cover 7, the bearing 6 is sleeved on the mandrel 2 in the large hole of the stepped through hole of the support 1, one side abuts the stepped surface, and the end cover 7 is fixed to the support 1 between the nut 3 and the support 1. The end cover 7 is a two-step thin stepped shaft, the center of which is provided with a two-step hole, and a plurality of through holes are formed in the large end face for screwing. The screw 71 can pass through the through hole of the large end of the end cover 7 and be screwed into the threaded hole 121 on the support 1 to realize the fixation of the end cover and the support. Therefore, the outer ring of the bearing 6 is limited by the end cover 7 and the stepped surface of the support 1 at both ends. The inner ring of the bearing 6 is limited by the elastic retainer 8 and the shaft shoulder retainer 9 at both sides, respectively. The elastic retainer 8 can be installed in the ring groove on the mandrel 2, and the shaft shoulder retainer 9 is positioned in the smaller hole of the stepped through hole of the support, and one end abuts the large end stepped surface of the mandrel 2.

[0052] The assembly process of the wire cutting machining clamp for connecting sleeve multi-narrow slot provided by the utility model is exemplarily as follows: the bearing 6 is installed in the hole of the support 1, one side abutting the stepped end surface of the support hole; one end of the bolt 51 is installed in the stepped hole 21 of the large end of the mandrel 2 and extends out of the hole; the bolt cap 52 is installed on one end of the bolt 51 extending out of the mandrel 2, and is fixed by the fixing pin 53. At this time, the bolt 51 can move back and forth in the stepped hole of the mandrel 2 in the axial direction without being pulled out from both sides; the shaft shoulder retainer 9 is sleeved on the mandrel 2, and one end thereof abuts the large end stepped surface of the mandrel 2; then the small end of the mandrel 2 is installed in the inner ring of the bearing from the stepped one end of the hole in the support 1, and the elastic retainer 8, the end cover 7, the gasket 31 and the nut 3 are sequentially installed on the small end of the mandrel 2, so that the mandrel 2 is fixed in the axial position in the support 1, wherein the end cover 7 is fixed to the end surface of the support by the screw 71; finally, the pressing sleeve 4 is installed at the end of the mandrel 2 in a threaded connection, and the assembly of the whole device is completed.

[0053] Next, taking the four-equal narrow slots of the wire cutting machining connecting sleeve as an example, the working principle of the wire cutting machining clamp for connecting sleeve multi-narrow slot provided by the utility model is described:

[0054] Step S1, the support 1 is fixed on the machine tool workbench by the U-shaped groove 111 with bolts, so that the small end of the mandrel 2 extends to the cutting machining area;

[0055] Step S2, unscrew the pressing sleeve 4, install the hole of the connecting sleeve to be machined on the cylindrical protrusion at the small end of the mandrel, make the large end of the connecting sleeve abut the stepped end surface of the mandrel 2, install the pressing sleeve 2 and tighten it to fix the connecting sleeve;

[0056] Step S3, rotate the knurled screw 10 to drive the spindle 2 to rotate, when the large end circumferential line of the spindle 2 coincides with the line on the work position hole 122 of the support 1, the bolt 51 is inserted into the work position hole 122 of the tail end surface of the support 1, and the spindle 2 is stopped from rotating relative to the support 1; At this time, the narrow slot in the first direction of the cutting processing coupling sleeve can be opened; After the first direction narrow slot of the coupling sleeve is processed, the knurled screw 10 is rotated clockwise to drive the spindle 2 to rotate 90°, and the large end circumferential line of the spindle 2 coincides with the line on the support 1 again. At this time, the bolt 51 is inserted into the corresponding work position hole of the tail end surface of the support 1, the spindle 2 stops rotating, the first direction narrow slot of the coupling sleeve located at the small end of the spindle 2 is turned by 90°, and the second direction narrow slot of the coupling sleeve can be opened for cutting processing; After the second direction narrow slot is cut, the four-equal-part narrow slots of the coupling sleeve 1 are processed.

[0057] Step S4, unscrew the pressing sleeve 4, take out the coupling sleeve, and install a new coupling sleeve part to be processed, and a new round of processing can be started. It can be seen that the fixture of the utility model has simple structure, low cost, good economy, easy operation, safety in use, fast assembly and disassembly of workpieces.

[0058] As described above, the utility model has simple structure, and through the cooperation of the pressing sleeve and the spindle, the coupling sleeve part with a hollow multi-step shaft, a thin large end step, and a small end requiring processing of multiple equal-part narrow slots can be reliably clamped, so that the part can be quickly and accurately positioned on the fixture, safely pressed, and repeatedly positioned. At the same time, by arranging the work position hole corresponding to the processing of the multiple equal-part narrow slots on the small end of the part on the support, precise indexing processing of the narrow slot can be realized.

[0059] Finally, it should be noted that the features mentioned and / or shown in the above description of the exemplary embodiments of the utility model can be combined in the same or similar manner into one or more other embodiments, combined with or replaced by corresponding features in other embodiments. The technical solutions obtained by combining or replacing should be considered to be within the protection scope of the utility model.

Claims

1. A wire-cut machining jig for coupling a sleeve to a multi-slot, characterized by: The support, the mandrel, the nut, the pressing sleeve and the latch assembly are included. The support is used for mounting on the workbench of a line cutting machine tool. The mandrel is a stepped shaft, and is rotatably mounted through the support, the large end of the mandrel is in contact with one end of the support, and the small end of the mandrel is used for mounting a coupling sleeve part to be machined. The nut is screwed on the mandrel at the other end of the support to axially position the mandrel. The pressing sleeve is a bottomed cylinder, which is used for coaxially connecting the part to be machined to the small end of the mandrel, the bottom wall of the pressing sleeve is in contact with the thin step between the large end and the small end of the part to be machined, and the cylinder wall is screwed on the mandrel, so that the part to be machined is pressed to the end face of the small end of the mandrel. The end face of the support in contact with the large end of the mandrel is provided with a plurality of work position holes coaxial with the mandrel, and the work position holes correspond to the machining of a plurality of equal narrow grooves of the part respectively.

2. The wire cutting machining fixture for coupling multiple narrow slots of a sleeve according to claim 1, characterized in that: The knurled screw is used for fixedly connecting to the large end of the mandrel to drive the mandrel to rotate.

3. The wire cutting machining jig for coupling multiple narrow slots of a sleeve according to claim 1 or 2, characterized in that: The latch assembly includes a latch, the large end of the mandrel is axially machined with a stepped hole, and the large hole in the stepped hole faces the support. The latch is mounted through the stepped hole of the mandrel, one end of the latch is used for inserting into the work position hole on the support, the middle part of the latch is provided with a radially outwardly protruding boss, the boss can abut on the stepped face of the stepped hole, and the other end of the latch is used for extending out of the mandrel.

4. The wire cutting machining fixture for coupling multiple narrow slots of a sleeve according to claim 3, characterized in that: The latch assembly further includes a latch cap and a fixed pin. The latch cap is used for connecting to the end of the latch extending out of the mandrel. The fixed pin is used for radially penetrating the latch cap and the latch to fixedly connect the latch cap to the latch.

5. The wire cutting machining jig for coupling multiple narrow slots of a sleeve according to claim 1 or 2, characterized in that: The bearing is sleeved on the mandrel in the support, and the end cover is fixedly connected to the support between the nut and the support, and the outer ring of the bearing is limited by the stepped portion of the end cover and the support at both ends.

6. The wire cutting machining fixture for coupling multiple narrow slots of a sleeve according to claim 5, wherein: The inner ring of the bearing is limited by the elastic retainer and the shaft shoulder retainer at both sides respectively.

7. The wire cutting machining jig for coupling multiple narrow slots of a sleeve according to claim 1 or 2, characterized in that: The outer periphery of the pressing sleeve is machined with a sawtooth structure, and two symmetrical planes are machined for the wrench to hold.

8. The wire cutting machining jig for coupling multiple narrow slots of a sleeve according to claim 1 or 2, characterized in that: The large end of the mandrel is machined with a line on the outer peripheral surface, and the support is provided with a line corresponding to the work position hole on the outer surface.

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