Workpiece clamp

Abstract

The utility model provides a workpiece clamp which is used for being matched with clamping and positioning of different structures and sizes. The workpiece clamp comprises a clamp clamping mechanism which is provided with a workpiece penetrating groove allowing a workpiece to penetrate through; the workpiece clamping mechanism is mounted above the clamp clamping mechanism and is used for clamping a workpiece; the workpiece circumferential positioning mechanism is mounted on the workpiece clamping mechanism and is used for performing circumferential positioning on the top of the workpiece clamped by the workpiece clamping mechanism; and the workpiece axial positioning mechanism is mounted below the clamp clamping mechanism and is used for abutting against the bottom of the workpiece penetrating through the workpiece penetrating groove so as to realize axial positioning of the workpiece.

Description

Technical Field

[0001] The utility model belongs to the workpiece clamp technology, in particular to a workpiece clamp. Background Art

[0002] During the machining process, for workpieces of different structures and sizes, it is often necessary to design a set of fixtures to clamp and position the workpieces to ensure that the machining can proceed and the machining accuracy requirements are met. Utility Model Content

[0003] The utility model provides a workpiece clamp, which is used for clamping and positioning workpieces with different structures and sizes.

[0004] The technical solution of the utility model is:

[0005] The present application provides a workpiece fixture, comprising:

[0006] A fixture clamping mechanism, wherein the fixture clamping mechanism is provided with a workpiece through-groove for the workpiece to pass through;

[0007] A workpiece clamping mechanism, mounted above the fixture clamping mechanism, for clamping the workpiece;

[0008] a workpiece circumferential positioning mechanism, mounted on the workpiece clamping mechanism, for circumferentially positioning the top of the workpiece clamped by the workpiece clamping mechanism;

[0009] The workpiece axial positioning mechanism is installed below the fixture clamping mechanism and is used for abutting against the bottom of the workpiece passing through the workpiece through-groove to achieve axial positioning of the workpiece.

[0010] Preferably, the workpiece clamping mechanism includes:

[0011] A three-axis cylinder fixedly assembled above the fixture clamping mechanism;

[0012] A movable V-shaped block is mounted on the push rod of the three-axis cylinder;

[0013] A fixed V-shaped block is fixedly assembled above the clamping mechanism of the fixture;

[0014] The movable V-block is provided with a first groove, and the fixed V-block is provided with a second groove. The first groove and the second groove are arranged opposite to each other, and the area between the first groove and the second groove forms a workpiece accommodating cavity for clamping the workpiece.

[0015] Preferably, the workpiece fixture further comprises:

[0016] The cylinder stroke adjustment mechanism is movably assembled on the fixture clamping mechanism and is used to adjust the push rod stroke of the three-axis cylinder.

[0017] Preferably, the workpiece circumferential positioning mechanism includes:

[0018] A guide shaft support, fixedly assembled on the fixed V-shaped block;

[0019] A linear guide shaft is movably mounted on the guide shaft support in a vertical direction;

[0020] A guide shaft plate is fixedly assembled on the linear guide shaft, so that the workpiece circumferential positioning mechanism slides on the guide shaft support along the vertical direction, thereby realizing circumferential positioning adjustment of workpieces of different heights;

[0021] A miniature guide rail, wherein the slide rail of the miniature guide rail is assembled on the guide shaft plate along a preset horizontal direction;

[0022] a circumferential positioning plate, mounted on the slider of the micro guide rail, wherein the circumferential positioning plate contacts the circumferential surface of the workpiece;

[0023] A spring plunger, the threaded end of the spring plunger is assembled on the guide shaft plate, the elastic end of the spring plunger extends out of the guide shaft plate and contacts the circumferential positioning plate, so that the circumferential positioning plate slides along a preset horizontal direction within the elastic range of the spring plunger.

[0024] Preferably, the workpiece axial positioning mechanism comprises:

[0025] Two linear guide rail mounting plates arranged opposite to each other are fixedly assembled below the clamping mechanism of the fixture;

[0026] Two linear guide rails are arranged opposite to each other, and the slide rails of the two linear guide rails are respectively mounted on a linear guide rail mounting plate in a vertical direction;

[0027] A U-shaped axial positioning plate is in contact with the bottom of the workpiece and is fixedly connected to the sliders of the two linear guide rails so that the axial positioning plate can slide in the vertical direction. The position of the axial positioning plate in the vertical direction is adjusted according to the length of the workpiece to ensure that the top of the workpiece is at a certain height.

[0028] Two guide rail clamps are respectively fixed to the axial positioning plate through a guide rail clamp connecting plate, and the two guide rail clamps respectively clamp or release the slide rail of a linear guide rail to achieve sliding fixation or release of the axial positioning plate in the vertical direction.

[0029] Preferably, the clamp holding mechanism comprises:

[0030] Indexing head holder for connection with processing equipment;

[0031] A clamping body for clamping and positioning the processing equipment, wherein the workpiece clamping mechanism is installed above the clamping body, and the workpiece axial positioning mechanism is installed below the clamping body;

[0032] The dividing head holder is assembled on one side of the clamp body through a cylindrical pin and a diamond pin;

[0033] A center hole is provided on the other side of the clamp body, and the axis of the center hole and the axis of the dividing head clamp are located on the same axis;

[0034] The workpiece through-groove is provided on the clamp body.

[0035] Preferably, a first limiting plate groove is provided on the upper surface of the clamp body, and a second limiting plate groove is provided on the lower surface of the clamp body;

[0036] The cylinder stroke adjustment mechanism includes: a first limit plate and a second limit plate connected by screws;

[0037] The first limiting plate is fixed in the second limiting plate slot, and the second limiting plate is movably placed in the first limiting plate slot;

[0038] The other end of the second limiting plate is arranged at a position that prevents the push rod of the three-axis cylinder from being retracted.

[0039] Preferably, a positive limiting boss and a negative limiting boss are extended from the edge of the circumferential positioning plate toward the guide shaft plate, and the lower edges of the positive limiting boss and the negative limiting boss are lower than the upper edge of the guide shaft plate;

[0040] The elastic end of the spring plunger contacts the surface of the positive limiting boss.

[0041] Preferably, the clamp body is provided with hanging screws.

[0042] The beneficial effects of the utility model are:

[0043] The fixture can realize the clamping and positioning of workpieces of different sizes and structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is the general assembly diagram of the positioning adjustable pneumatic clamp in the embodiment of the utility model;

[0045] Figure 2 This is a front view of a positioning-adjustable pneumatic clamp clamping a workpiece in an embodiment of the present utility model;

[0046] Figure 3 A three-dimensional view of a workpiece being clamped by a positioning-adjustable pneumatic clamp in an embodiment of the present utility model;

[0047] Figure 4 This is an axonometric view of a workpiece being clamped by a positioning-adjustable pneumatic clamp in an embodiment of the present utility model;

[0048] Figure 5 This is a schematic diagram of the assembly of the workpiece axial positioning mechanism in an embodiment of the present utility model;

[0049] Figure 6 This is a schematic diagram of the assembly of the workpiece axial positioning mechanism in an embodiment of the present utility model;

[0050] Figure 7 for Figure 3 A magnified schematic diagram of point A;

[0051] Figure 8 This is a schematic diagram of the assembly of the cylinder stroke adjustment mechanism, the three-axis cylinder, and the clamping body in an embodiment of the present utility model;

[0052] Figure 9 Schematic diagram of the assembly of the workpiece circumferential positioning mechanism and the fixed V-block in an embodiment of the present utility model;

[0053] Figure 10 for Figure 9 A partial enlarged schematic diagram;

[0054] Figure 11 Schematic diagram of a clamping body in an embodiment of the present utility model;

[0055] Figure 12 Schematic diagram of a clamping body in an embodiment of the present utility model;

[0056] Figure 13 A schematic diagram of a movable V-shaped block in an embodiment of the present utility model;

[0057] Figure 14 Schematic diagram of a fixed V-shaped block in an embodiment of the present utility model;

[0058] Figure 15 Schematic diagram of the guide shaft support in the embodiment of the present utility model;

[0059] Figure 16 Schematic diagram of the guide shaft plate in an embodiment of the present utility model;

[0060] Figure 17 Schematic diagram of a circumferential positioning plate in an embodiment of the present utility model;

[0061] Figure 18 is a schematic diagram of a guide rail clamp in an embodiment of the present utility model;

[0062] Marking in the figure: 101 - workpiece accommodating chamber;

[0063] 1- fixture clamping mechanism; 2- workpiece clamping mechanism; 3- workpiece circumferential positioning mechanism; 4- workpiece axial positioning mechanism; 5- cylinder stroke adjustment mechanism;

[0064] 11-dividing head holder; 12-clamping body; 13-cylindrical pin; 14-diamond pin;

[0065] 121 - workpiece through slot; 122 - first limit plate slot; 123 - second limit pressure plate slot; 124 - lifting screw;

[0066] 21-three-axis cylinder; 22-movable V-block; 221-first groove; 23-fixed V-block; 231-second groove;

[0067] 31-Linear guide shaft; 32-Guide shaft support; 321-Locking screw; 33-Guide shaft plate; 331-Spring plunger threaded through hole; 34-Micro guide rail; 341-Slider; 35-Spring plunger; 351-Elastic end; 36-Circumferential positioning plate; 361-Forward limiting boss; 362-Reverse limiting boss;

[0068] 41-axial positioning plate; 42-linear guide rail mounting plate; 43-guide rail clamp; 431-knurled nut; 44-linear guide rail; 441-slider; 45-guide rail limit screw; 46-guide rail clamp connecting plate;

[0069] 51-screw; 52-first limiting plate; 53-second limiting plate. DETAILED DESCRIPTION

[0070] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. Furthermore, descriptions of known structures and technologies are omitted in the following description to avoid unnecessary confusion regarding the concepts of the present invention.

[0071] Reference Figures 1-18 , an embodiment of the present application provides a workpiece fixture, comprising:

[0072] A fixture clamping mechanism 1, wherein the fixture clamping mechanism 1 is provided with a workpiece through-groove 121 for the workpiece 6 to pass through;

[0073] a workpiece clamping mechanism 2 , mounted above the fixture clamping mechanism 1 , for clamping the workpiece 6 ;

[0074] A workpiece circumferential positioning mechanism 3 is installed on the workpiece clamping mechanism 2 and is used to circumferentially position the top of the workpiece 6 clamped by the workpiece clamping mechanism 2;

[0075] The workpiece axial positioning mechanism 4 is installed below the fixture clamping mechanism 1 and is used to abut against the bottom of the workpiece 6 passing through the workpiece through-slot 121 to achieve axial positioning of the workpiece 6 .

[0076] Reference Figure 4 , the clamp clamping mechanism 1 comprises:

[0077] An indexing head holder 11 for connection to a processing device;

[0078] A clamping body 12, wherein the workpiece clamping mechanism 2 is installed above the clamping body 12, and the workpiece axial positioning mechanism 4 is installed below the clamping body 12;

[0079] The dividing head holder 11 is assembled on one side of the clamp body 12 through a cylindrical pin 13 and a diamond pin 14;

[0080] A center hole is provided on the other side of the clamp body 12, and the axis of the center hole is coaxial with the axis of the dividing head clamp 11;

[0081] The workpiece through-groove 121 is provided on the clamp body 12 .

[0082] The workpiece fixture is installed on the dividing head and tailstock top of a milling machine or vertical machining center through the center hole on the dividing head clamp 11 and the clamp body 12. The clamping method is that the dividing head is clamped by a three-jaw chuck and the tailstock top is tightened.

[0083] Reference Figure 2 、 Figure 3 and Figure 4 , including: the workpiece clamping mechanism 2 includes:

[0084] The three-axis cylinder 21 is fixedly mounted on the upper surface of the clamp body 12; the three-axis cylinder 21 is assembled on the clamp body 12 by screw connection;

[0085] A movable V-shaped block 22 is mounted on the push rod of the three-axis cylinder 21;

[0086] A fixed V-shaped block 23 is fixedly assembled on the upper surface of the clamp body 12;

[0087] The movable V-block 22 is provided with a first groove 221 , and the fixed V-block 23 is provided with a second groove 231 . The first groove 221 and the second groove 231 are arranged opposite to each other, and the area between the first groove 221 and the second groove 231 forms a workpiece accommodating cavity 101 for clamping the workpiece 6 .

[0088] The first groove 221 and the second groove 231 are V-shaped grooves, and the V-shaped surfaces of the movable V-block 22 and the fixed V-block 23 are used to clamp the outer circle of the cylindrical workpiece 6, thereby realizing self-centering clamping of the workpiece 6; as the push rod of the three-axis cylinder 21 extends or retracts, the movable V-block 22 can follow the push rod of the three-axis cylinder 21 to move relatively close to or away from the fixed V-block 23, thereby adjusting the size of the workpiece accommodating cavity 101, and then adapting to the clamping of workpieces 6 of different sizes. The diameter range of the workpiece 6 that can be clamped by the movable V-block 22 and the fixed V-block 23 is the cylinder stroke range.

[0089] Reference Figure 1 , the workpiece fixture further comprises:

[0090] The cylinder stroke adjustment mechanism 5 is movably assembled on the clamp body 12 and is used to adjust the push rod stroke of the three-axis cylinder 21.

[0091] Reference Figure 3 、 Figure 4 、 Figure 9 、 Figure 10 、 Figure 15-17 , the workpiece circumferential positioning mechanism 3 includes:

[0092] The guide shaft support 32 is fixedly assembled on the fixed V-shaped block 23;

[0093] The linear guide shaft 31 is movably mounted on the guide shaft support 32 in the vertical direction, so that the workpiece circumferential positioning mechanism 3 slides on the guide shaft support 32 in the vertical direction to achieve circumferential positioning adjustment of workpieces of different heights;

[0094] A guide shaft plate 33 is fixedly assembled on the linear guide shaft 31;

[0095] A micro guide rail 34, wherein the slide rail of the micro guide rail 34 is assembled on the guide shaft plate 33 along a preset horizontal direction;

[0096] A circumferential positioning plate 36 is mounted on the slider of the micro guide rail 34 , and the circumferential positioning plate 36 contacts the circumferential surface of the workpiece 6 ;

[0097] The spring plunger 35 has its threaded end assembled in the spring plunger threaded through hole 331 on the guide shaft plate 33, and its elastic end 351 extends out of the guide shaft plate 33 and contacts the circumferential positioning plate 36, so that the circumferential positioning plate 36 slides along a preset horizontal direction within the elastic range of the spring plunger 35.

[0098] Reference Figure 4A mounting groove is opened on the upper surface of the fixed V-shaped block 23, and the guide shaft support 32 extends into the mounting groove and is assembled on the fixed V-shaped block 23 by screws.

[0099] The circumferential positioning plate 36 is fixed to the slider by screws, and the circumferential positioning plate 36 slides on the slide rail together with the slider.

[0100] Reference Figure 3 and Figure 9 The micro guide rail 34 includes a slide rail 341 and a slider assembled on the slide rail 241. The preset horizontal direction refers to the horizontal direction close to or away from the workpiece 6 (such as Figure 9 The slide rail 341 is fixed on the guide shaft plate 33 along the preset horizontal direction, and the slider can slide along the slide rail 341.

[0101] Reference Figure 9 、 Figure 10 、 Figure 15 The lower end of the linear guide shaft 31 extends into the guide shaft support 32, and the guide shaft support 32 is provided with a locking screw 321; during assembly, the operator moves the linear guide shaft 31 in the vertical direction (such as Figure 9 The linear guide shaft 31 is inserted into the guide shaft support 32 (in the Z direction) according to the type of the workpiece 6. The depth of the linear guide shaft 31 inserted into the guide shaft support 32 is adjusted. After adjustment into place, the locking screw 321 is tightened. The locking screw 321 abuts against the linear guide shaft 31 so that the linear guide shaft 31 is fixed in the vertical direction.

[0102] The guide shaft plate 33 is assembled with the linear guide shaft 31 by means of threaded connection or the like.

[0103] If the flat surface of the workpiece 6 does not reach the positioning position in the circumferential direction, the flat surface of the workpiece 6 will not be completely aligned with the side of the axial positioning plate 41. Since the elastic end 351 of the spring plunger 35 is elastic, the force applied by the workpiece 6 to the axial positioning plate 41 along the preset horizontal direction will be transmitted to the spring plunger 35. The elastic end 351 of the spring plunger 35 is compressed, and a reaction force is applied to the stroke of the circumferential positioning plate 36 along the preset horizontal direction. The reaction force pushes the workpiece 6 to rotate, so that the flat surface of the workpiece 6 is completely aligned with the side of the axial positioning plate 41, thereby achieving circumferential positioning. In order to adapt to the different flat surface sizes of the workpiece 6, the reset position of the circumferential positioning plate 36 is changed by adjusting the screw-in length of the spring plunger 35 to achieve the flat surface size requirements of workpieces 6 of different specifications. At the same time, the entire workpiece circumferential positioning mechanism 3 is installed in the guide shaft support 32 through the linear guide shaft 31. That is to say, for workpieces 6 of different length specifications, the circumferential positioning plate 36 slides up and down in the guide shaft support 32 through the linear guide shaft 31, so that the circumferential positioning plate 36 reaches the height of the circumferential positioning flat surface of the workpiece 6, thereby achieving compatibility with multiple varieties of workpieces 6 with different flat surface sizes and different length sizes.

[0104] Reference Figures 4 to 7 , the workpiece axial positioning mechanism 4 includes:

[0105] Two linear guide rail mounting plates 42 arranged opposite to each other are fixedly mounted on the lower surface of the clamp body 12;

[0106] Two linear guide rails 44 are arranged opposite to each other, and the slide rails 441 of the two linear guide rails 44 are respectively mounted on a linear guide rail mounting plate 42 along the vertical direction;

[0107] A U-shaped axial positioning plate 41 , the axial positioning plate 41 contacts the bottom of the workpiece 6 , and the axial positioning plate 41 is fixedly connected to the sliders of the two linear guide rails 44 ;

[0108] Two guide rail clamps 43 are respectively fixed to the axial positioning plate 41 through a guide rail clamp connecting plate 46 , and the two guide rail clamps 43 respectively clamp or release a slide rail 441 of a linear guide rail 44 .

[0109] The guide rail clamp 43 is a standard part. The guide rail clamp 43 is screwed to the guide rail clamp connecting plate 46, and the axial positioning plate 41 is screwed to the guide rail clamp connecting plate 46. By tightening the knurled nut 431 on the guide rail clamp 43, the slide rail 441 of the linear guide 44 is clamped, so that the axial positioning plate 41 is fixed and cannot slide in the vertical direction; by loosening the knurled nut 431 on the guide rail clamp 43, the slide rail 441 of the linear guide 44 is loosened, so that the axial positioning plate 41 can continue to slide in the vertical direction along the slide rail 441. During actual assembly, the position of the axial positioning plate 41 can be adjusted in the vertical direction as needed, so that the top of the workpiece 6 of different lengths is maintained at the required position, meeting the axial positioning requirements of workpieces of different lengths 6.

[0110] Reference Figure 5 Guide rail limiting screws 45 are also installed on the two sets of linear guide rails 44 to prevent the axial positioning plate 41 from sliding out of the linear guide rails 44.

[0111] Reference Figure 8 、 Figure 11 and Figure 12 A first limiting plate groove 122 is formed on the upper surface of the clamp body 12, and a second limiting plate groove 123 is formed on the lower surface of the clamp body 12;

[0112] The cylinder stroke adjustment mechanism 5 includes: a first limit plate 52 and a second limit plate 53 connected by screws 51;

[0113] The first limiting plate 52 is fixed in the second limiting plate groove 123 , and the second limiting plate 53 is movably placed in the first limiting plate groove 122 ;

[0114] The other end of the second limiting plate 53 is arranged at a position that blocks the push rod of the three-axis cylinder 21 from being retracted.

[0115] According to the required stroke of the three-axis cylinder 21, the position of the second limit plate 53 in the first limit plate slot 122 is moved to adjust the retraction stroke of the push rod of the three-axis cylinder 21. After the position is in place, the first limit plate 52 and the second limit plate 53 are fixed together by screws 51. When the first limit plate 52 and the second limit plate 53 are locked, the movement of the push rod of the three-axis cylinder 21 is restricted by the second limit plate 53 during retraction, thereby achieving position limiting. This allows the retraction position of the three-axis cylinder 21 to be adjusted when clamping workpieces 6 of different diameters. This ensures that the gap between the V-shaped surface of the movable V-shaped block 22 and the workpiece 6 is not too large when the three-axis cylinder 21 is retracted, preventing the operator's fingers from accidentally entering the gap and being pinched.

[0116] Reference Figure 10The circumferential positioning plate 36 extends toward the edge of the guide shaft plate 33 to form a positive limiting boss 361 and a negative limiting boss 362 , and the lower edges of the positive limiting boss 361 and the negative limiting boss 362 are lower than the upper edge of the guide shaft plate 33 ;

[0117] The elastic end 351 of the spring plunger 35 contacts the surface of the positive limiting boss 361 .

[0118] Since the lower edges of the positive limiting boss 361 and the reverse limiting boss 362 are lower than the upper edge of the guide shaft plate 33 , the sliding of the circumferential positioning plate 36 on the micro guide rail 34 has a limiting and anti-dropping function.

[0119] Reference Figure 4 , a hanging screw 124 is installed on the clamp body 12. The hanging screw 124 is used for clamp transportation and is removed when in use to avoid affecting the use of the clamp.

[0120] The above-mentioned workpiece fixture in the embodiment of the present application has the following effects:

[0121] The fixture can be installed on the machine tool indexing head and tailstock center, one clamp and one top, which enhances the stability and reliability of the fixture.

[0122] The workpiece accommodating cavity 101 formed by the symmetrically distributed first grooves 221 and the second grooves 231 is used to clamp the outer circle of the workpiece 6, thereby achieving centering clamping of cylindrical parts and ensuring clamping stability.

[0123] The workpiece circumferential positioning mechanism 3 is adjustable in both Z and X directions (i.e., up and down, left and right). The Z-direction sliding has a quick locking function, and the X-direction sliding has a quick adjustment function and can be elastically reset within a certain range, which increases the adaptability of clamping the workpiece 6.

[0124] The workpiece axial positioning mechanism 4 can be quickly adjusted within a certain range, increasing the adaptability of clamping the workpiece 6. The double guide rails are symmetrically installed, which increases the stability of axial positioning and sliding smoothness, and adopts a guide rail clamp 43 with a quick locking function to achieve quick locking of the guide rails.

[0125] The three-axis cylinder 21 is used to clamp the workpiece 6, which has stable clamping force, is environmentally friendly and energy-saving, and is conducive to automation transformation.

[0126] The design of the cylinder stroke adjustment mechanism 5 can quickly adjust the push rod position when the three-axis cylinder 21 is opened according to the different specifications of the workpiece 6, so that the gap between the fixture and the workpiece 6 will not be too large when the fixture is clamped, avoiding the operator's fingers from accidentally entering the gap to prevent pinching.

[0127] The fixture has the universal function of handling multiple varieties of similar workpieces 6 with different specifications, and the workpiece axial positioning mechanism 4, the workpiece circumferential positioning mechanism 3, the workpiece axial positioning mechanism 4 and the cylinder stroke adjustment mechanism 5 can be quickly and adaptively adjusted during production change, which is conducive to rapid production change.

[0128] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0129] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0130] It should also be noted that, in this document, the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are for the purpose of facilitating the description of the present invention and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, relational terms such as "first" and "second" are used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any actual relationship or order between these entities or operations, nor should they be understood as indicating or implying relative importance. Moreover, the terms "include", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device comprising a series of elements does not include those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or terminal device comprising the element.

[0131] The technical solutions provided by the present invention have been described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is intended only to facilitate understanding of the present invention, and the contents of this specification should not be construed as limiting the present invention. Furthermore, those skilled in the art will appreciate that various modifications may be made to the specific implementation methods and scope of application according to the present invention. It is not necessary and impossible to exhaustively enumerate all implementation methods herein, and any obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A workpiece fixture, characterized in that: include: A fixture clamping mechanism (1), wherein the fixture clamping mechanism (1) is provided with a workpiece through-groove (121) for the workpiece (6) to pass through; A workpiece clamping mechanism (2) is installed above the fixture clamping mechanism (1) and is used to clamp the workpiece (6); A workpiece (6) circumferential positioning mechanism (3) is mounted on the workpiece clamping mechanism (2) and is used to circumferentially position the top of the workpiece (6); A workpiece axial positioning mechanism (4) is installed below the fixture clamping mechanism (1) and is used to abut against the bottom of the workpiece (6) passing through the workpiece through-groove (121) to achieve axial positioning of the workpiece (6).

2. The workpiece clamp according to claim 1, wherein: include: The workpiece clamping mechanism (2) comprises: A three-axis cylinder (21) fixedly assembled above the fixture clamping mechanism (1); A movable V-shaped block (22) is mounted on the push rod of the three-axis cylinder (21); A fixed V-shaped block (23) is fixedly assembled above the clamping mechanism (1); The movable V-shaped block (22) is provided with a first groove (221), and the fixed V-shaped block (23) is provided with a second groove (231), the first groove (221) and the second groove (231) being arranged relative to each other, and the area between the first groove (221) and the second groove (231) forms a workpiece accommodating cavity (101) for clamping the workpiece (6).

3. The workpiece clamp according to claim 2, wherein: The workpiece fixture further comprises: A cylinder stroke adjustment mechanism (5) is movably assembled on the fixture clamping mechanism (1) and is used to adjust the push rod stroke of the three-axis cylinder (21).

4. The workpiece clamp according to claim 2, wherein: The workpiece (6) circumferential positioning mechanism (3) includes: A guide shaft support (32) fixedly assembled on the fixed V-shaped block (23); A linear guide shaft (31) is movably mounted on the guide shaft support (32) in a vertical direction, so that the workpiece circumferential positioning mechanism (3) slides on the guide shaft support (32) in a vertical direction, thereby realizing circumferential positioning adjustment of workpieces (6) of different heights; A guide shaft plate (33) fixedly mounted on the linear guide shaft (31); A miniature guide rail (34), wherein the slide rail of the miniature guide rail (34) is assembled onto the guide shaft plate (33) along a preset horizontal direction; A circumferential positioning plate (36) is mounted on the slider of the micro guide rail (34), wherein the circumferential positioning plate (36) contacts the circumferential surface of the workpiece (6); A spring plunger (35), wherein the threaded end of the spring plunger (35) is assembled on the guide shaft plate (33), and the elastic end (351) of the spring plunger (35) extends out of the guide shaft plate (33) and contacts the circumferential positioning plate (36), so that the circumferential positioning plate (36) slides along a preset horizontal direction within the elastic range of the spring plunger (35).

5. The workpiece clamp according to claim 2, wherein: The workpiece axial positioning mechanism (4) comprises: Two linear guide rail mounting plates (42) arranged opposite to each other are fixedly mounted below the fixture clamping mechanism (1); Two linear guide rails (44) are arranged opposite to each other, and the slide rails of the two linear guide rails (44) are respectively mounted on a linear guide rail mounting plate (42) along the vertical direction; An axial positioning plate (41) is arranged in a U-shape, the axial positioning plate (41) contacts the bottom of the workpiece (6), and the axial positioning plate (41) is fixedly connected to the sliders of the two linear guide rails (44), so that the axial positioning plate (41) can slide in the vertical direction, and the position of the axial positioning plate (41) in the vertical direction is adjusted according to the length of the workpiece (6) to ensure that the top of the workpiece (6) is at a certain height; Two guide rail clamps (43), the two guide rail clamps (43) are respectively fixed to the axial positioning plate (41) through a guide rail clamp connecting plate (46), and the two guide rail clamps (43) respectively clamp or release the slide rail of a linear guide rail (44) to achieve sliding fixation or release of the axial positioning plate (41) in the vertical direction.

6. The workpiece clamp according to claim 3, wherein: The clamping mechanism (1) comprises: An indexing head holder (11) for connection to a processing device; A clamping body (12) for clamping and positioning processing equipment, wherein the workpiece clamping mechanism (2) is installed above the clamping body (12), and the workpiece axial positioning mechanism (4) is installed below the clamping body (12); The dividing head holder (11) is assembled on one side surface of the clamp body (12) via a cylindrical pin (13) and a diamond pin (14); A center hole is provided on the other side of the clamp body (12), and the axis of the center hole and the axis of the dividing head clamp (11) are located on the same axis; The workpiece through-groove (121) is provided on the clamp body (12).

7. The workpiece clamp according to claim 6, wherein: A first limiting plate groove (122) is provided on the upper surface of the clamp body (12), and a second limiting plate groove (123) is provided on the lower surface of the clamp body (12); The cylinder stroke adjustment mechanism (5) comprises: a first limit plate (52) and a second limit plate (53) connected by screws; The first limiting plate (52) is fixed in the second limiting plate slot (123), and the second limiting plate (53) is movably placed in the first limiting plate slot (122); The other end of the second limiting plate (53) is arranged at a position that blocks the retraction of the push rod of the three-axis cylinder (21).

8. The workpiece clamp according to claim 4, wherein: The circumferential positioning plate (36) extends toward the edge of the guide shaft plate (33) to form a positive limiting boss (361) and a negative limiting boss (362), and the lower edges of the positive limiting boss (361) and the negative limiting boss (362) are lower than the upper edge of the guide shaft plate (33); The elastic end (351) of the spring plunger (35) contacts the surface of the positive limiting boss (361).

9. The workpiece clamp according to claim 6, wherein: A hanging screw (124) is installed on the clamp body (12).

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