Expansion sleeve type workpiece fixing jig

Abstract

The utility model discloses an expansion sleeve type workpiece fixing jig which comprises an inner supporting clamp expansion sleeve, a mandrel is arranged in the inner supporting clamp expansion sleeve, the inner supporting clamp expansion sleeve comprises a conical expansion sleeve body, a plurality of expansion clamps are arranged on the head portion of the expansion sleeve body, and a detachable positioning block is arranged outside each expansion clamp. According to the expansion sleeve type workpiece fixing jig, the existing working mode that the mandrel is pulled backwards to open the expansion sleeve is changed, so that the problems of parallelism and roundness caused by backward movement of the mandrel are effectively avoided, and the machining precision is effectively improved.

Description

Technical Field

[0001] The utility model relates to a jig, more specifically, to an expansion sleeve type workpiece fixing jig. Background Art

[0002] When machining annular workpieces, it is necessary to take both parallelism and roundness into consideration. Existing fixtures generally use a rear-pull mandrel structure. However, this structure easily causes the positioning end face of the workpiece to deflect, making it impossible to obtain effective positioning. Utility Model Content

[0003] Based on this, it is necessary to provide an expansion sleeve type workpiece fixing fixture to address the above technical problems.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] An expansion sleeve type workpiece fixing fixture, characterized in that the expansion sleeve type workpiece fixing fixture comprises an inner support clamp expansion sleeve, wherein a mandrel is provided inside the inner support clamp expansion sleeve.

[0006] The inner support clamp expansion sleeve comprises a conical expansion sleeve body, a plurality of expansion clips are arranged at the head of the expansion sleeve body, an annular expansion sleeve flange is arranged at the tail of the expansion sleeve body, a plurality of flange through holes are arranged on the expansion sleeve flange, and a detachable positioning block is arranged outside the expansion clip.

[0007] The spindle comprises a disk-shaped spindle body, a spindle cavity is arranged inside the spindle body, a plurality of through holes are arranged on the circumference of the spindle body, a cylindrical connecting sleeve is arranged in the through hole, and a hammer-shaped shaft core is arranged in the center of the spindle body.

[0008] The outer side of the expansion sleeve body of the inner support clamp expansion sleeve is provided with a front connecting fork, and the inner side of the mandrel cavity is provided with a rear connecting fork.

[0009] A clamp shaft is arranged in the rear connecting fork, and the clamp shaft comprises a cylindrical clamp shaft body, and a connecting thread section is arranged at the end of the clamp shaft body.

[0010] As a preferred embodiment of the utility model, the front connecting fork includes a cylindrical front connecting fork body, and a plurality of front connecting fork holes are arranged on the circumference of the front connecting fork body; the rear connecting fork includes a cylindrical rear connecting fork body, and a plurality of rear connecting fork holes are arranged on the circumference of the rear connecting fork body.

[0011] As a preferred embodiment of the utility model, the connecting sleeve is connected to the flange through hole via a connecting screw.

[0012] As a preferred embodiment of the utility model, the inner wall of the expansion clamp is provided with an inclined expansion clamp slope.

[0013] As a preferred embodiment of the utility model, a positioning pin is provided at the center of the expansion clamp.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model provides an expansion sleeve type workpiece fixing fixture, which changes the existing working mode of pulling back a mandrel to open the expansion sleeve, thereby effectively avoiding the problems of parallelism and roundness caused by the backward movement of the mandrel and effectively improving the processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the scheme in the utility model, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of the expansion sleeve type workpiece fixing fixture of the utility model;

[0018] Figure 2 for Figure 1 A schematic cross-sectional structure diagram of an internal support fixture expansion sleeve of an expansion sleeve type workpiece fixing fixture;

[0019] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of the mandrel of the expansion sleeve type workpiece fixing fixture;

[0020] Figure 4 for Figure 1 A schematic diagram of the structure of the positioning pin of the expansion sleeve type workpiece fixing fixture;

[0021] Figure 5 for Figure 1 A schematic cross-sectional structure diagram of a rear connecting fork of an expansion sleeve type workpiece fixing fixture;

[0022] Figure 6 for Figure 1 A schematic cross-sectional structure diagram of a front connecting fork of an expansion sleeve type workpiece fixing fixture;

[0023] Figure 7 for Figure 1 A schematic diagram of the cross-sectional structure of the fixture shaft of the expansion sleeve type workpiece fixing fixture;

[0024] The markings in the figure are as follows: 1. Expansion sleeve type workpiece fixing fixture; 10. Positioning pin; 2. Internal support fixture expansion sleeve; 21. Expansion sleeve body; 22. Expansion sleeve flange; 221. Flange through hole; 23. Expansion clamp; 231. Expansion clamp inclined surface; 3. Mandrel; 31. Mandrel disk body; 310. Mandrel cavity; 311. Disk body through hole; 32. Shaft core; 4. Front connecting fork; 41. Front connecting fork body; 42. Front connecting fork hole; 5. Positioning block; 6. Rear connecting fork; 61. Rear connecting fork body; 62. Rear connecting fork hole; 7. Clamp shaft; 71. Clamp shaft body; 72. Connecting threaded section; 8. Connecting sleeve; 9. Connecting screw. Implementation

[0025] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0026] like Figures 1 to 7 As shown, the expansion sleeve type workpiece fixing fixture 1 includes an inner support clamp expansion sleeve 2, and a spindle 3 is provided inside the inner support clamp expansion sleeve 2.

[0027] like Figure 2 As shown, the internal support clamp expansion sleeve 2 includes a conical expansion sleeve body 21, a plurality of expansion clamps 23 are provided at the head of the expansion sleeve body 21, the inner wall of the expansion clamp 23 is provided with an inclined expansion clamp slope 231, a positioning pin 10 is provided at the center of the expansion clamp 23, and an annular expansion sleeve flange 22 is provided at the tail of the expansion sleeve body 21, and a plurality of flange through holes 221 are provided on the expansion sleeve flange 22, and a detachable positioning block 5 is provided on the outside of the expansion clamp 23.

[0028] like Figure 3 As shown, the spindle 3 includes a disc-shaped spindle body 31, a spindle cavity 310 is provided inside the spindle body 31, a plurality of disc through holes 311 are provided on the circumference of the spindle body 31, a cylindrical connecting sleeve 8 is provided in the disc through hole 311, and the connecting sleeve 8 is connected to the flange through hole 221 by a connecting screw 9. A hammer-shaped shaft core 32 is provided in the center of the spindle body 31.

[0029] like Figure 6 As shown, a front connecting fork 4 is provided on the outer side of the expansion sleeve body 21 of the inner support clamp expansion sleeve 2. The front connecting fork 4 includes a cylindrical front connecting fork body 41. A plurality of front connecting fork holes 42 are provided on the circumference of the front connecting fork body 41.

[0030] like Figure 5 As shown, a rear connecting fork 6 is disposed in the spindle cavity 310 , and the rear connecting fork 6 includes a cylindrical rear connecting fork body 61 , and a plurality of rear connecting fork holes 62 are disposed on the circumference of the rear connecting fork body 61 .

[0031] like Figure 7 As shown, a clamp shaft 7 is disposed in the rear connecting fork body 61 , and the clamp shaft 7 includes a cylindrical clamp shaft body 71 , and a connecting thread section 72 is disposed at the end of the clamp shaft body 71 .

[0032] It should be noted that the clamp shaft 7 is connected to an external oil cylinder.

[0033] The working method of the expansion sleeve type workpiece fixing fixture 1 is described below.

[0034] like Figure 1 As shown, the user places the annular workpiece M to be processed on the expansion clamp 23 of the inner support clamp expansion sleeve 2, and then starts the oil cylinder, and the clamp shaft 7 pulls the rear connecting fork 6 and the inner support clamp expansion sleeve 2 along the direction F, so that the end face of the annular workpiece M is close to the end face of the positioning block 5. Finally, the machining process starts.

[0035] The expansion sleeve type workpiece fixing fixture 1 changes the existing working mode of pulling back the mandrel to open the expansion sleeve, thereby effectively avoiding the parallelism and roundness problems caused by the backward movement of the mandrel, and effectively improving the processing accuracy.

[0036] Without limitation to this, any changes or substitutions that are not conceived through creative work should be included in the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope defined in the claims.

Claims

1. An expansion sleeve type workpiece fixing fixture, It is characterized in that The expansion sleeve type workpiece fixing fixture (1) comprises an internal support fixture expansion sleeve (2), wherein a mandrel (3) is provided inside the internal support fixture expansion sleeve (2). The inner support fixture expansion sleeve (2) comprises a conical expansion sleeve body (21), the head of the expansion sleeve body (21) is provided with a plurality of expansion clamps (23), the tail of the expansion sleeve body (21) is provided with an annular expansion sleeve flange (22), the expansion sleeve flange (22) is provided with a plurality of flange through holes (221), and the outside of the expansion clamp (23) is provided with a detachable positioning block (5). The spindle (3) comprises a disk-shaped spindle body (31), a spindle cavity (310) is provided inside the spindle body (31), a plurality of body through holes (311) are provided in the circumferential direction of the spindle body (31), a cylindrical connecting sleeve (8) is provided in the body through hole (311), and a hammer-shaped shaft core (32) is provided in the center of the spindle body (31). A front connecting fork (4) is provided on the outside of the expansion sleeve body (21) of the internal support clamp expansion sleeve (2), and a rear connecting fork (6) is provided in the spindle cavity (310). A clamp shaft (7) is arranged inside the rear connecting fork (6), and the clamp shaft (7) comprises a cylindrical clamp shaft body (71), and a connecting thread section (72) is arranged at the end of the clamp shaft body (71).

2. The expansion sleeve workpiece fixing fixture according to claim 1, It is characterized in that The front connecting fork (4) comprises a cylindrical front connecting fork body (41), and a plurality of front connecting fork holes (42) are provided on the circumference of the front connecting fork body (41). The rear connecting fork (6) comprises a cylindrical rear connecting fork body (61), and a plurality of rear connecting fork holes (62) are provided on the circumference of the rear connecting fork body (61).

3. The expansion sleeve workpiece fixing fixture according to claim 2, It is characterized in that The connecting sleeve (8) is connected to the flange through hole (221) via a connecting screw (9).

4. The expansion sleeve workpiece fixing fixture according to claim 3, It is characterized in that The inner wall of the expansion clamp (23) is provided with an inclined expansion clamp slope (231).

5. The expansion sleeve workpiece fixing fixture according to claim 4, It is characterized in that A positioning pin (10) is provided at the center of the expansion clamp (23).

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