Three-coordinate detection fixture

Abstract

The utility model relates to a three -coordinate detection clamp, including base, set up first support spare of one side of the base, set up second support spare of the other side of the base, detachable connection work piece between first support spare with second support spare, the first clamping piece of clamping work piece, the second clamping piece of clamping work piece other end, the top support subassembly of adjusting work piece level height and the down -pressing subassembly of down -pressing work piece, first clamping piece set up on first support spare, second clamping piece set up on second support spare, top support subassembly sets up on the base and the top of top support subassembly and the force surface of work piece resistance, down -pressing subassembly set up on second support spare, the bottom of down -pressing subassembly and the force surface of work piece resistance, solved the need to design special auxiliary detection clamp to help positioning, and gather clamp positioning surface to replace part datum surface, while clamp can not interfere with CMM measurement path, the existing part positioning mode is not accurate, influences the follow -up detection efficiency and accuracy.

Description

Technical Field

[0001] This utility model relates to the field of inspection fixtures, and in particular to a three-coordinate inspection fixture. Background Technology

[0002] In existing technologies, coordinate measuring machine (CMM) is a precision measurement method for inspecting workpieces. It is widely used in modern industries such as machinery manufacturing and automobile manufacturing. CMM is sometimes also used in reverse engineering design, which involves collecting and mapping the spatial geometry and three-dimensional data of an object to provide point data. Then, software is used to construct a three-dimensional model. Unlike traditional measuring instruments that compare the measured object with a mechanical reference, CMM measurement is actually based on the collection and calculation of spatial point coordinates. During inspection, the workpiece is placed on a platform, and the measuring machine probe collects point data from the workpiece from different directions. The workpiece needs to be fixed using a positioning fixture. Some irregularly shaped shell parts have complex structures and high dimensional accuracy requirements, which imposes strict requirements on the inspection methods and necessitates the use of CMM (Computer-Machine Interface) for inspection. On the other hand, the inspection datum for such parts is located inside the part's cavity, and the CMM probe cannot establish a coordinate system by directly acquiring the part's datum surface. Therefore, it is necessary to design special auxiliary inspection fixtures to help with positioning and to acquire the fixture's positioning surface to replace the part's datum surface. At the same time, the fixture must not interfere with the CMM measurement path. Existing part positioning methods are not accurate, affecting the efficiency and accuracy of subsequent inspections. Utility Model Content

[0003] This application provides a coordinate measuring machine (CMM) fixture, which solves the problem that the prior art requires the design of special auxiliary measuring fixtures to help with positioning and to collect the fixture positioning surface to replace the part's reference surface; at the same time, the fixture must not interfere with the CMM measurement path, and the existing part positioning method is not accurate, which affects the efficiency and accuracy of subsequent inspection.

[0004] The technical solutions adopted in the embodiments of this application are as follows.

[0005] A coordinate measuring machine (CMM) fixture includes a base, a first support member disposed on one side of the base, a second support member disposed on the other side of the base, a workpiece detachably connected between the first support member and the second support member, a first clamping member clamping the workpiece, a second clamping member clamping the other end of the workpiece, a top support assembly for adjusting the horizontal height of the workpiece, and a bottom pressing assembly for pressing down the workpiece; the first clamping member is disposed on the first support member; the second clamping member is disposed on the second support member; the top support assembly is disposed on the base and its top abuts against the force-bearing surface of the workpiece; the bottom pressing assembly is disposed on the second support member and its bottom abuts against the force-bearing surface of the workpiece.

[0006] As a further improvement to the above technical solution: the first clamping member includes a first rod, a clamping member for pressing the workpiece, and a second block for aligning the position of the workpiece; the second block is disposed on the first support member; the second block is disposed opposite to the clamping member; the clamping member slides on the first rod.

[0007] As a further improvement to the above technical solution: the second clamping member includes a third rod, a clamping member for pressing the workpiece, a third block disposed on the second support member, a fourth block disposed on the second support member, a fifth block disposed on the third block, and a sixth block threaded on the fourth block; the end faces of the fifth block and the sixth block opposite each other are spiked; when the sixth block is rotated, the sixth block moves closer to or away from the workpiece; the clamping member array is disposed on the third rod; the working end of the clamping member abuts against the force-bearing part of the workpiece.

[0008] As a further improvement to the above technical solution: the pressing assembly includes a seventh block and a clamping member disposed on the seventh block; the clamping member is located above the workpiece; a second groove is provided on the second support member; the second groove communicates with the rotation part of the clamping member.

[0009] As a further improvement to the above technical solution: the clamping component includes a first block and a second rod for adjusting the position of the first block; the second rod is threaded onto the rod; a first groove is formed on the first block; the first groove is convex in shape; a connector is provided on the end face of the second rod; the connector is located in the first groove; when the second rod rotates, it causes the first block to slide.

[0010] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages: 1. Due to the use of a base set on the ground, a first support member is set on one side of the base, and a second support member is set on the other side of the base. Both the first and second support members are square plates with extensions at both ends, forming an overall U-shape. A first rod is set on the first support member, and a first rod is set on the first rod. The first rod is detachably connected to the first support member. A clamping member is set on the first rod, which abuts against the side wall of the workpiece. A second block is set on the first support member, which abuts against the other side wall of the workpiece. The clamping member and the second block are positioned correspondingly. The workpiece is located between the second block and the clamping member, so that the clamping member presses the workpiece until the second block and the clamping block simultaneously abut against the workpiece, fixing the workpiece position. A third rod is set on the second support member, and the third rod is detachably connected to the second support member. A clamping member is set on the third rod, and the clamping member varies in length depending on its distance from the workpiece. Three sets of clamping members are set on the third rod. The second support member has a third block, and the second support member has a second rod. The support has a fourth block, with the third and fourth blocks positioned opposite each other. The third block has a fifth block, and the fourth block is threadedly connected to a sixth block. The sixth and fifth blocks have spikes on their opposite end faces. When the sixth block is rotated, it moves until the spikes of the sixth and fifth blocks abut against the workpiece, thus restricting the workpiece's position. The second support has a seventh block with a clamping block. The end face of the clamping block is adapted to the tilt angle of the top of the workpiece. The first block is square-shaped, and its end face is adapted to different surfaces that contact the workpiece. The first block slides on a rod and has a first groove that is convex. The second rod is threadedly connected to the rod and has a connector. The connector consists of two sets of cylinders with different diameters. The cross-section of the connector corresponds to the cross-section of the first groove. When the connector is in the first groove, the second rod rotates, causing the first block to move until it abuts against the side wall of the workpiece, thereby achieving precise workpiece positioning and accurate detection. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the three-coordinate measuring fixture in this utility model.

[0012] Figure 2 This is a schematic diagram of the three-coordinate measuring fixture in this utility model.

[0013] Figure 3 for Figure 2 A sectional view of A.

[0014] Figure 4 for Figure 2 Sectional view of B.

[0015] In the diagram: 2. First support member; 3. Second support member; 31. Second groove; 4. Workpiece; 5. First clamping member; 51. First rod; 52. Second block; 6. Second clamping member; 61. Third rod; 62. Third block; 63. Fourth block; 64. Fifth block; 65. Sixth block; 7. Top support assembly; 8. Downward pressing assembly; 81. Seventh block; 9. Clamping member; 91. First block; 911. First groove; 92. Second rod; 921. Connecting member. Detailed Implementation

[0016] This application provides a coordinate measuring machine (CMM) fixture, which solves the problem that the prior art requires the design of special auxiliary measuring fixtures to help with positioning and to collect the fixture positioning surface to replace the part's reference surface; at the same time, the fixture must not interfere with the CMM measurement path, and the existing part positioning method is not accurate, which affects the efficiency and accuracy of subsequent inspection.

[0017] The technical solution in this application embodiment is to solve the above problems, and the overall idea is as follows: To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0018] A coordinate measuring machine (CMM) fixture includes a base, a first support member 2 disposed on one side of the base, a second support member 3 disposed on the other side of the base, a workpiece 4 detachably connected between the first support member 2 and the second support member 3, a first clamping member 5 for clamping the workpiece 4, a second clamping member 6 for clamping the other end of the workpiece 4, a top support assembly 7 for adjusting the horizontal height of the workpiece 4, and a bottom pressing assembly 8 for pressing down the workpiece 4; the first clamping member 5 is disposed on the first support member 2; the second clamping member 6 is disposed on the second support member 3; the top support assembly 7 is disposed on the base and its top abuts against the force-bearing surface of the workpiece 4; the bottom pressing assembly 8 is disposed on the second support member 3 and its bottom abuts against the force-bearing surface of the workpiece 4.

[0019] The first clamping member 5 includes a first rod 51, a clamping member 9 for clamping the workpiece 4, and a second block 52 for aligning the workpiece 4. The second block 52 is disposed on the first support member 2. The second block 52 is disposed opposite to the clamping member 9. The clamping member 9 slides on the first rod 51.

[0020] The second clamping member 6 includes a third rod 61, a clamping member 9 for clamping the workpiece 4, a third block 62 disposed on the second support member 3, a fourth block 63 disposed on the second support member 3, a fifth block 64 disposed on the third block 62, and a sixth block 65 threaded on the fourth block 63; the end faces of the fifth block 64 and the sixth block 65 are both spike-shaped; when the sixth block 65 is rotated, the sixth block 65 moves closer to or away from the workpiece 4; the clamping members 9 are arranged in an array on the third rod 61; the working end of the clamping member 9 abuts against the force-bearing part of the workpiece 4.

[0021] The pressing assembly 8 includes a seventh block 81 and a clamping member 9 disposed on the seventh block 81; the clamping member 9 is located above the workpiece 4; a second groove 31 is provided on the second support member 3; the second groove 31 is connected to the rotation part of the clamping member 9.

[0022] The clamping component 9 includes a first block 91 and a second rod 92 for adjusting the position of the first block 91; the second rod 92 is threaded onto the rod; a first groove 911 is provided on the first block 91; the first groove 911 is convex in shape; a connector 921 is provided on the end face of the second rod 92; the connector 921 is located in the first groove 911; when the second rod 92 rotates, it causes the first block 91 to slide.

[0023] The base is set on the ground. A first support member 2 is set on one side of the base, and a second support member 3 is set on the other side of the base. Both the first support member 2 and the second support member 3 are square plates with extensions at both ends, forming an overall U-shape. A first rod 51 is set on the first support member 2, and a clamping member 9 is set on the first rod 51, which abuts against the side wall of the workpiece 4. A second block 52 is set on the first support member 2, which abuts against the other side wall of the workpiece 4. The clamping element 9 corresponds to the position of the second block 52. The workpiece 4 is located between the second block 52 and the clamping element 9, so that the clamping element 9 clamps the workpiece 4 until the second block 52 and the clamping block simultaneously abut against the workpiece 4, at which point the position of the workpiece 4 is fixed. A third rod 61 is provided on the second support member 3. The third rod 61 is detachably connected to the second support member 3. A clamping element 9 is provided on the third rod 61. The clamping elements 9 vary in length depending on their distance from the workpiece 4. Three sets of clamping elements 9 are provided on the third rod 61. A third block 62 is provided on the second support member 3. Four blocks 63, the third block 62 and the fourth block 63 are arranged opposite each other, the third block 62 is equipped with the fifth block 64, and the fourth block 63 is threadedly connected to the sixth block 65. The end faces of the sixth block 65 and the fifth block 64 are both spiked. When the sixth block 65 is rotated, the sixth block 65 moves until the spiked ends of the sixth block 65 and the fifth block 64 abut against the workpiece 4, thereby restricting the position of the workpiece 4. The second support member 3 is equipped with the seventh block 81, and the seventh block 81 is equipped with the clamping block. The end face of the clamping member 9 is adapted to the tilt angle of the top of the workpiece 4. The first block 91 is square. The shape of the first block 91 is adapted to the different surfaces that contact the workpiece 4. The first block 91 slides on the rod. The first block 91 has a first groove 911, which is convex. The second rod 92 is threaded onto the rod. The second rod 92 is provided with a connector 921, which consists of two sets of cylinders with different diameters. The cross section of the connector 921 corresponds to the cross section of the first groove 911. When the connector 921 is located in the first groove 911, the second rod 92 rotates to move the first block 91 until the first block 91 abuts against the side wall of the workpiece 4.

[0024] Because the base is set on the ground, a first support member 2 is set on one side of the base, and a second support member 3 is set on the other side of the base. Both the first support member 2 and the second support member 3 are square plates with extensions at both ends, forming an overall U-shape. A first rod 51 is set on the first support member 2, and a clamping member 9 is set on the first rod 51, which abuts against the side wall of the workpiece 4. A second block 52 is set on the first support member 2, which abuts against the other side wall of the workpiece 4. The clamping element 9 corresponds to the position of the second block 52. The workpiece 4 is located between the second block 52 and the clamping element 9, so that the clamping element 9 clamps the workpiece 4 until the second block 52 and the clamping block simultaneously abut against the workpiece 4, at which point the position of the workpiece 4 is fixed. A third rod 61 is provided on the second support member 3. The third rod 61 is detachably connected to the second support member 3. A clamping element 9 is provided on the third rod 61. The clamping elements 9 vary in length depending on their distance from the workpiece 4. Three sets of clamping elements 9 are provided on the third rod 61. A third block 62 is provided on the second support member 3. A fourth block 63 is provided on the second support member 3. Three blocks 62 and the fourth block 63 are arranged opposite each other. A fifth block 64 is provided on the third block 62. A sixth block 65 is threadedly connected to the fourth block 63. The end faces of the sixth block 65 and the fifth block 64 are both spiked. When the sixth block 65 is rotated, it moves until the spiked ends of the sixth block 65 and the fifth block 64 abut against the workpiece 4, thereby restricting the position of the workpiece 4. A seventh block 81 is provided on the second support member 3. A clamping block is provided on the seventh block 81. The end face of the clamping member 9 is adapted to the tilt angle of the top of the workpiece 4. The first block 91 is square in shape. The end face of the first block 91... According to the different surfaces in contact with the workpiece 4, the first block 91 slides on the rod. The first block 91 has a first groove 911, which is convex. The second rod 92 is threaded onto the rod. The second rod 92 is provided with a connector 921, which consists of two sets of cylinders with different diameters. The cross section of the connector 921 corresponds to the cross section of the first groove 911. When the connector 921 is located in the first groove 911, the second rod 92 rotates, causing the first block 91 to move until the first block 91 abuts against the side wall of the workpiece 4, thereby achieving precise positioning and accurate detection of the workpiece 4.

[0025] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0026] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A coordinate measuring machine fixture, characterized in that, The device includes a base, a first support member (2) disposed on one side of the base, a second support member (3) disposed on the other side of the base, a workpiece (4) detachably connected between the first support member (2) and the second support member (3), a first clamping member (5) clamping the workpiece (4), a second clamping member (6) clamping the other end of the workpiece (4), a top support assembly (7) for adjusting the horizontal height of the workpiece (4), and a bottom pressing assembly (8) for pressing down the workpiece (4); the first clamping member (5) is disposed on the first support member (2); the second clamping member (6) is disposed on the second support member (3); the top support assembly (7) is disposed on the base and the top of the top support assembly (7) abuts against the force-bearing surface of the workpiece (4); the bottom pressing assembly (8) is disposed on the second support member (3); and the bottom of the bottom pressing assembly (8) abuts against the force-bearing surface of the workpiece (4).

2. The coordinate measuring machine fixture as described in claim 1, characterized in that, The first clamping member (5) includes a first rod (51), a clamping member (9) for pressing the workpiece (4), and a second block (52) for aligning the workpiece (4); the second block (52) is disposed on the first support member (2); the second block (52) is disposed opposite to the clamping member (9); the clamping member (9) slides on the first rod (51).

3. The coordinate measuring machine fixture as described in claim 1, characterized in that, The second clamping member (6) includes a third rod (61), a clamping member (9) for clamping the workpiece (4), a third block (62) disposed on the second support member (3), a fourth block (63) disposed on the second support member (3), a fifth block (64) disposed on the third block (62), and a sixth block (65) threaded on the fourth block (63); the end faces of the fifth block (64) and the sixth block (65) are both spike-shaped; when the sixth block (65) is rotated, the sixth block (65) moves closer to or away from the workpiece (4); the clamping members (9) are arranged in an array on the third rod (61); the working end of the clamping member (9) abuts against the force-bearing part of the workpiece (4).

4. The coordinate measuring machine fixture as described in claim 1, characterized in that, The pressing assembly (8) includes a seventh block (81) and a clamping member (9) disposed on the seventh block (81); the clamping member (9) is located above the workpiece (4); a second groove (31) is provided on the second support member (3); the second groove (31) is connected to the rotation part of the clamping member (9).

5. The coordinate measuring machine fixture as described in claim 2, 3, or 4, characterized in that, The clamping component (9) includes a first block (91) and a second rod (92) for adjusting the position of the first block (91); the second rod (92) is threaded onto the rod; a first groove (911) is provided on the first block (91); the first groove (911) is convex; a connector (921) is provided on the end face of the second rod (92); the connector (921) is located in the first groove (911); when the second rod (92) rotates, it causes the first block (91) to slide.

Images