A three-coordinate measuring machine precision detection device

Abstract

The present invention discloses a three-coordinate measuring machine precision detection device, which belongs to the technical field of detection devices, and includes a base, a support rod, a measuring plate, a gauge block fixing plate and a gauge block. The base and the measuring plate are connected by a light rod bolt, and the measuring plate can rotate relative to the base. The support rod is detachably connected between the base and the measuring plate to fix the position of the measuring plate. The base and the measuring plate are respectively provided with corresponding grooves and positioning holes. When the support rod is connected to different grooves and positioning holes, the angle between the measuring plate and the base is different. In the invention, the angle between the measuring plate and the base is set to 60°, 45° and 30°. The three-coordinate measuring machine precision detection device of the present invention can evaluate the measurement accuracy of the three-coordinate measuring machine at different angles, and the detection is more comprehensive; the gauge block is placed on the measuring plate and fastened by adsorption by a magnet, and is convenient to place and remove.

Description

Technical Field

[0001] The invention belongs to the technical field of detection devices, and in particular relates to a precision detection device for a three-coordinate measuring machine. Background Art

[0002] The three-dimensional coordinate measuring machine is a kind of testing equipment commonly used in the testing industry. The three-dimensional coordinate measuring machine is used to detect the size of the product to be tested, which is used for product quality inspection and to evaluate whether the product is qualified. Therefore, the measurement accuracy of the three-dimensional coordinate measuring machine is very important. The measurement accuracy of the three-dimensional coordinate measuring machine needs to be tested, and the three-dimensional coordinate measuring machine needs to be adjusted in time according to the test results to make it have higher measurement accuracy.

[0003] When testing the accuracy of a three-dimensional coordinate measuring machine, a gauge block is generally placed at different angles in the three-dimensional coordinate measuring machine to measure its detection accuracy. In the prior art, an angle ruler is usually used to control the rotation angle of the gauge block. When controlling the gauge block to be at a specific rotation angle, the operation is inconvenient and it is difficult to control the rotation accuracy of the rotation angle, which will also have a certain impact on the detection accuracy of the detection process. Summary of the invention

[0004] The purpose of the present invention is to provide a three-dimensional coordinate measuring machine accuracy detection device to solve the technical problems mentioned in the background technology.

[0005] In order to achieve the above-mentioned purpose, the present invention discloses a three-dimensional coordinate measuring machine precision detection device, including a base, a support rod, a measuring plate, a gauge block fixing plate and a gauge block, wherein the gauge block is a rectangular parallelepiped structure;

[0006] The base includes a bottom rod, which is a rectangular rod-shaped structure. A first mounting through hole is provided at the left end of the bottom rod and passes through the width direction of the bottom rod. A measuring plate mounting through hole is provided at the left end of the measuring plate at a position corresponding to the first mounting through hole and passes through the width direction of the measuring plate. A polished rod bolt passes through the first mounting through hole and the measuring plate mounting through hole. The screw end of the polished rod bolt is tightened with a nut to connect the bottom rod and the measuring plate together.

[0007] The support rod is detachably connected between the bottom rod and the measuring plate, the bottom of the support rod is connected to the bottom rod, and the top of the support rod is connected to the measuring plate;

[0008] The gauge block fixing plate is fixed above the measuring plate, and a plurality of sections perpendicular to the length direction of the gauge block fixing plate are provided on the gauge block fixing plate. The distance between each section and the left end portion of the gauge block fixing plate is different, and a vertical corner is formed between each section and the side wall of the adjacent section and the upper surface of the measuring plate. The gauge block is placed on the upper surface of the measuring plate, and the left end portion of the gauge block is placed in the vertical corner.

[0009] Furthermore, along the width direction of the gauge block fixing plate, the distance between the cross section and the left end portion of the gauge block fixing plate increases or decreases in sequence.

[0010] Furthermore, a positioning hole is provided on the side wall of the measuring plate, a top mounting through hole is provided on the top of the support rod, and a bolt passes through the top mounting through hole and the positioning hole to connect the support rod and the measuring plate together.

[0011] Furthermore, a groove is provided on the bottom rod, and the bottom rod includes a first bottom rod and a second bottom rod arranged in parallel; the support rod includes a first support rod and a second support rod, which are respectively located on the outside of the first bottom rod and the second bottom rod; a connecting rod is provided on the base, and the connecting rod includes a center rod and connecting parts integrally formed at both ends of the center rod, the center rod is a cylindrical structure, and the connecting part is a cylindrical structure with an internal threaded hole at the end, the length of the connecting part is equal to the width of the bottom rod, the length of the center rod is equal to the spacing between the first bottom rod and the second bottom rod, the outer diameter of the connecting part is equal to the width of the groove set on the bottom rod, and is smaller than the outer diameter of the center rod; the connecting rod is erected between the first bottom rod and the second bottom rod, and the connecting parts at both ends of the connecting rod are respectively located inside the groove of the first bottom rod and the groove of the second bottom rod; a bottom mounting through hole is provided at the bottom of the support rod, and bolts pass through the bottom mounting through hole and the internal threaded hole at the end of the connecting rod to connect the bottom of the support rod with the connecting rod.

[0012] Further, the number of the grooves is 3, which are the first groove, the second groove and the third groove from the left end to the right end of the bottom rod; the number of the positioning holes is 3, which are the first positioning hole, the second positioning hole and the third positioning hole from the left end to the right end of the measuring plate;

[0013] The length between the top mounting through hole and the bottom mounting through hole on the support rod is x;

[0014] The distance between the first mounting through hole and the first groove on the bottom rod is x / tan60°, the distance between the first mounting through hole and the second groove on the bottom rod is x / tan45°, and the distance between the first mounting through hole and the third groove on the bottom rod is x / tan30°;

[0015] The distance between the measuring board mounting through hole and the first positioning hole on the measuring board is x / sin60°, the distance between the measuring board mounting through hole and the second positioning hole on the measuring board is x / sin45°, and the distance between the measuring board mounting through hole and the third positioning hole on the measuring board is x / sin30°.

[0016] Further, the measuring plate is located between the first bottom bar and the second bottom bar, and the width of the measuring plate is equal to the distance between the first bottom bar and the second bottom bar.

[0017] Furthermore, a support block is fixedly connected to the right end between the first bottom bar and the second bottom bar, and the length of the support block is equal to the distance between the first bottom bar and the second bottom bar.

[0018] Furthermore, a gauge block fixing plate and a stopper are sequentially fixedly connected above the left end of the measuring plate. The stopper is a rectangular parallelepiped structure. The widths of the measuring plate, the gauge block fixing plate and the stopper are equal.

[0019] Furthermore, the gauge block is made of a magnetic alloy material, and magnet placement holes are provided on the measuring plate along the length direction of each section on the gauge block fixing plate, and magnets are provided in the magnet placement holes.

[0020] Further, the number of magnet placement holes arranged on the measuring plate along the length direction of each section is ≧2.

[0021] The working principle of the three-coordinate measuring machine precision detection device of the present invention is as follows: a gauge block is placed above a measuring plate, and the gauge block is firmly and standardizedly placed above the measuring plate by using a gauge block fixing plate and a magnet arranged above the measuring plate, and the gauge block is calibrated with professional measurement units and has precise dimensions; the measuring plate is connected to a base by using a support rod and a connecting rod and can rotate relative to the base, that is, the angle between the measuring plate and the base is adjustable; the three-coordinate measuring machine precision detection device is placed on a detection platform of the three-coordinate measuring machine, and the three-coordinate measuring machine measures the dimensions of the gauge block at different angles, and the measured dimensions are compared with the actual dimensions of the gauge block, so that the measurement accuracy of the three-coordinate measuring machine at different angles can be obtained, thereby evaluating the measurement accuracy of the three-coordinate measuring machine.

[0022] Compared with the prior art, the three-coordinate measuring machine precision detection device of the present invention has the following advantages:

[0023] (1) In the three-coordinate measuring machine precision detection device of the present invention, the measuring plate can rotate relative to the base, and the gauge block is placed above the measuring plate. The three-coordinate measuring machine can measure the size of the gauge block at different placement angles (60°, 45° and 30°), which can more comprehensively evaluate the measurement accuracy of the three-coordinate measuring machine.

[0024] (2) In the three-coordinate measuring machine precision detection device of the present invention, the gauge block is placed directly above the measuring plate, and the direction of the gauge block is regulated and the position of the gauge block is fixed by the gauge block fixing plate and the magnet set on the measuring plate, so that the placement and removal of the gauge block are convenient.

[0025] (3) In the three-coordinate measuring machine precision detection device of the present invention, a stopper is fixedly provided above the measuring plate, which can serve as a base when the measuring plate is rotated to a vertical base to prevent the measuring plate from tipping over when the measuring plate is adjusted in rotation angle.

[0026] (4) The three-coordinate measuring machine precision detection device of the present invention has a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 : Schematic diagram of the overall structure of the three-dimensional coordinate measuring machine precision detection device in Example 1 when no gauge block is placed.

[0028] Figure 2 : Schematic diagram of the structure of the three-dimensional coordinate measuring machine precision detection device after placing the gauge block in Example 1.

[0029] Figure 3 : Schematic diagram of the connection structure of the measuring plate, the gauge block fixing plate, the stopper and the gauge block in Example 1.

[0030] Figure 4 : The structural diagram of the polished rod bolt in Example 1.

[0031] Figure 5 : Schematic diagram of the structure of the connecting rod in Example 1.

[0032] Figure 6 : Schematic diagram of the inclination angle between the measuring plate and the base in Example 1.

[0033] Explanation of the reference numerals: 1-base; 2-support rod; 3-measuring plate; 4-gauge block; 5-gauge block fixing plate; 6-stop block; 7-support block; 8-connecting rod; 11-first bottom rod; 12-second bottom rod; 21-first support rod; 22-second support rod; 13-first groove; 14-second groove; 15-third groove; 31-first positioning hole; 32-second positioning hole; 33-third positioning hole; 34-magnet placement hole; 51-section; 35-measuring plate mounting through hole; 81-center rod; 82-connecting part; 91-bare rod bolt; 92-first bolt; 93-second bolt; 94-third bolt; 95-fourth bolt. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is described in detail below through specific embodiments.

[0035] Example 1

[0036] like Figure 1-6 As shown, a structural schematic diagram of a three-coordinate measuring machine accuracy detection device is given.

[0037] The three-dimensional coordinate measuring machine precision detection device comprises a base 1, a support rod 2, a measuring plate 3 and a gauge block 4. The gauge block 4 is a rectangular parallelepiped structure and is made of a magnetic alloy material.

[0038] The base 1 includes a bottom rod and a support block 7; the bottom rod is a rectangular rod-shaped structure, a first mounting through hole is provided at the left end of the bottom rod and passes through the width direction of the bottom rod, and a second mounting through hole is provided at the right end of the bottom rod and passes through the width direction of the bottom rod, the number of the first mounting through hole is 1, and the number of the second mounting through holes is 2; three grooves are provided on the bottom rod along the length direction of the bottom rod, located between the first mounting through hole and the second mounting through hole, the groove passes through the width direction of the bottom rod, the bottom of the groove is semicircular arc-shaped, and the top is rectangular, the semicircular arc of the bottom of the groove is tangent to the top rectangle, and from the left end to the right end of the bottom rod, the three grooves are respectively the first groove 13, the second groove 14 and the third groove 15;

[0039] The bottom rod comprises a first bottom rod 11 and a second bottom rod 12 arranged in parallel, the measuring plate 3 is located between the first bottom rod 11 and the second bottom rod 12, at the left end of the measuring plate 3 at a position corresponding to the first mounting through hole, a measuring plate mounting through hole 35 is provided in the width direction of the measuring plate 3, a polished rod bolt 91 passes through the first mounting through hole and the measuring plate mounting through hole 35, the screw end of the polished rod bolt 91 is tightened with a nut, the measuring plate 3 is connected with the first bottom rod 11 and the second bottom rod 12, and the measuring plate 3 can rotate along the base 1 with the polished rod bolt 91 as the rotation point;

[0040] The support block 7 is a rectangular structure and is located at the right end of the first bottom bar 11 and the second bottom bar 12. The support block 7 is fixedly connected between the first bottom bar 11 and the second bottom bar 12. The length of the support block 7 is equal to the distance between the first bottom bar 11 and the second bottom bar 12. Mounting blind holes are reserved at positions on the support block 7 corresponding to the second mounting through holes on the first bottom bar 11 and the second bottom bar 12. Internal threads are provided in the mounting blind holes. The second bolt 93 passes through the second mounting through hole and the mounting blind hole on the support block 7 in sequence to fix the support block 7 to the right ends of the first bottom bar 11 and the second bottom bar 12.

[0041] A gauge block fixing plate 5 and a stopper 6 are fixedly connected in sequence above the measuring plate 3. The stopper 6 is a rectangular parallelepiped structure. The widths of the measuring plate 3, the gauge block fixing plate 5 and the stopper 6 are equal. A mounting through hole is provided at the left end of the gauge block fixing plate 5 and passes through the thickness direction of the gauge block fixing plate 5. A mounting through hole is provided at the left end of the stopper 6 and passes through the thickness direction of the stopper 6. A mounting blind hole is provided on the measuring plate 3, and an internal thread is provided in the mounting blind hole. The mounting blind hole, the gauge block fixing plate 5 and the stopper 6 provided on the measuring plate 3 correspond in position and match in size. The first bolt 92 passes through the mounting through holes on the stopper 6 and the gauge block fixing plate 5, as well as the mounting blind hole on the measuring plate 3 in sequence, and the gauge block fixing plate 5 and the stopper 6 are fixed in sequence above the measuring plate 3.

[0042] Six sections 51 perpendicular to the length direction of the gauge block fixing plate 5 are provided on the gauge block fixing plate 5, and the six sections 51 are evenly distributed in the width direction of the gauge block fixing plate 5 in a stepped structure; along the width direction of the gauge block fixing plate 5, the distance between each of the six sections 51 and the left end of the gauge block fixing plate 5 increases or decreases successively, and a vertical corner is formed between each section 51 and the side wall of the adjacent section 51 and the upper surface of the measuring plate 3. The gauge block 4 with a rectangular structure is placed on the upper surface of the measuring plate 3, and the left end of the gauge block 4 is placed in the vertical corner formed between the section 51 of the gauge block fixing plate 5 and the upper surface of the measuring plate 3, which can ensure that the gauge block 4 can be placed vertically on the measuring plate 3 in a standardized manner.

[0043] On the measuring plate 3, two magnet placement holes 34 are provided along the length direction of each section 51, and the spacing between the magnet placement holes 34 is set according to the length of the gauge block 4: the longer the distance between the section 51 and the left end of the gauge block fixing plate 5, the smaller the spacing between the two magnet placement holes 34 set in the length direction of the section 51.

[0044] A magnet is fixed in the magnet placement hole 34 , and the magnet can be used to absorb the gauge block 4 placed on the measuring plate 3 to ensure that the position of the gauge block 4 does not move and ensure that the gauge block 4 does not fall off the measuring plate 3 when the measuring plate 3 rotates along the base 1 .

[0045] The support rod 2 is detachably connected between the bottom rod and the measuring plate 3. The bottom of the support rod 2 is connected to the bottom rod, and the top is connected to the measuring plate 3. A bottom mounting through hole is provided at the position where the bottom of the support rod 2 is connected to the bottom rod, and a top mounting through hole is provided at the position where the top of the support rod 2 is connected to the measuring plate 3.

[0046] A connecting rod 8 is provided on the base 1, and the connecting rod 8 includes a center rod 81 and connecting parts 82 integrally formed at both ends of the center rod. The center rod 81 is a cylindrical structure, and the connecting part 82 is a cylindrical structure with an internal threaded hole at the end. The length of the connecting part 82 is equal to the width of the bottom rod, the length of the center rod 81 is equal to the spacing between the first bottom rod 11 and the second bottom rod 12, and the outer diameter of the connecting part 82 is equal to the width of the groove provided on the bottom rod, and is smaller than the outer diameter of the center rod 81. The connecting rod 8 is mounted between the first bottom rod 11 and the second bottom rod 12, and the connecting parts 82 at both ends of the connecting rod 8 are located inside the groove of the first bottom rod 11 and the groove of the second bottom rod 12, respectively.

[0047] The bottom mounting through hole of the support rod 2 corresponds to the internal threaded hole at the end of the connecting rod 8. The fourth bolt 95 passes through the bottom mounting through hole of the support rod 2 and the internal threaded hole at the end of the connecting rod 8 to connect the support rod 2 and the connecting rod 8 together.

[0048] A positioning hole is provided on the side wall of the measuring plate 3 corresponding to the groove, and the top mounting hole of the support rod 2 corresponds to the position of the positioning hole. The third bolt 94 passes through the top mounting hole and the positioning hole to connect the support rod 2 and the measuring plate 3 together.

[0049] Three positioning holes are provided on the side wall of the measuring plate 3 . From the left end to the right end of the measuring plate 3 , the three positioning holes are respectively a first positioning hole 31 , a second positioning hole 32 and a third positioning hole 33 .

[0050] The length between the top mounting through hole and the bottom mounting through hole on the support rod 2 is x;

[0051] The distance between the first mounting hole on the bottom bar and the first groove 13 is x / tan60°, the distance between the first mounting hole on the bottom bar and the second groove 14 is x / tan45°, and the distance between the first mounting hole on the bottom bar and the third groove 15 is x / tan30°;

[0052] The distance between the measuring board mounting through hole 35 and the first positioning hole 31 on the measuring board 3 is x / sin60°, the distance between the measuring board mounting through hole 35 and the second positioning hole 32 on the measuring board 3 is x / sin45°, and the distance between the measuring board mounting through hole 35 and the third positioning hole 33 on the measuring board 3 is x / sin30°.

[0053] When the top mounting hole of the support rod 2 is connected to the first positioning hole 31 on the side wall of the measuring plate 3, the connecting rod 8 is mounted on the first groove 13 of the bottom rod, and the bottom mounting hole of the support rod 2 is connected to the connecting rod 8 at the first groove 13 on the bottom rod. At this time, the inclination angle between the measuring plate 3 and the base 1 is 60°; when the top mounting hole of the support rod 2 is connected to the second positioning hole 32 on the side wall of the measuring plate 3, the connecting rod 8 is mounted on the second groove 14 of the bottom rod, and the bottom mounting hole of the support rod 2 is connected to the connecting rod 8 at the second groove 14 on the bottom rod. At this time, the inclination angle between the measuring plate 3 and the base 1 is 45°; when the top mounting hole of the support rod 2 is connected to the third positioning hole 33 on the side wall of the measuring plate 3, the connecting rod 8 is mounted on the third groove 15 of the bottom rod, and the bottom mounting hole of the support rod 2 is connected to the connecting rod 8 at the third groove 15 on the bottom rod 2. At this time, the inclination angle between the measuring plate 3 and the base 1 is 30°. The support rod 2 includes a first support rod 21 and a second support rod 22 , which are respectively located outside the first bottom rod 11 and the second bottom rod 12 .

[0054] When the three-coordinate measuring machine precision detection device in this embodiment 1 is used, the operation steps are as follows:

[0055] (1) Place the three-dimensional coordinate measuring machine precision detection device on the detection platform of the three-dimensional coordinate measuring machine, and adjust the angle between the measuring plate 3 and the base 1: align the top mounting through hole of the support rod 2 with the first positioning hole 31 on the side wall of the measuring plate 3, and pass the third bolt 94 through the top mounting through hole of the support rod 2 and the first positioning hole 31 in sequence to fix the top of the support rod 2 on the side wall of the measuring plate 3; place the connecting rod 8 horizontally on the first bottom rod 11 and the second bottom rod 12, and place the connecting parts 82 at both ends of the connecting rod 8 in the first grooves 13 of the first bottom rod 11 and the second bottom rod 12 respectively; align the bottom mounting through hole of the support rod 2 with the connecting part 82 of the connecting rod 8, and pass the fourth bolt 95 through the bottom mounting through hole of the support rod 2 and the internal threaded hole at the end of the connecting rod 8 in sequence to fix the bottom of the support rod 2 on the bottom rod;

[0056] (2) Place the gauge block 4 above the measuring plate 3, with the end of the gauge block 4 aligned with the vertical corner formed by the section 51 on the gauge block fixing plate 5. The gauge block 4 is placed on the measuring plate 3 along the length direction of the section 51 and is firmly adsorbed on the measuring plate 3 by the magnet in the magnet placement hole 34 provided in the length direction of the section 51. One or more gauge blocks 4 may be placed as required, and each gauge block 4 is placed along a section 51 on the gauge block fixing plate 5.

[0057] (3) Use a three-dimensional coordinate measuring machine to measure the size of the gauge block 4, and compare the size with the actual size of the gauge block 4 to obtain the measurement accuracy of the three-dimensional coordinate measuring machine at a 60° tilt angle;

[0058] (4) As needed, adjust the angle between the measuring plate 3 and the base 1, place the connecting parts 82 at both ends of the connecting rod 8 in the second grooves 14 (or third grooves 15) of the first bottom rod 11 and the second bottom rod 12 respectively, align the bottom mounting hole of the support rod 2 with the connecting part 82 of the connecting rod 8, and align the top mounting through hole of the support rod 2 with the second positioning hole 32 (or third positioning hole 33) on the side wall of the measuring plate 3; use a three-dimensional coordinate measuring machine to measure the dimensions of the gauge block 4 at different angles and compare them with the actual dimensions of the gauge block 4. The measurement accuracy of the three-dimensional coordinate measuring machine at an inclination angle of 45° (or 30°) can be obtained, so that the measurement accuracy of the three-dimensional coordinate measuring machine can be more comprehensively evaluated.

[0059] When adjusting the angle between the measuring plate 3 and the base 1, first remove the support rod 2 and the connecting rod 8, and rotate the measuring plate 3 to be perpendicular to the base 1. At this time, the stopper 6 arranged above the measuring plate 3 and the gauge block fixing plate 5 acts as a base to prevent the measuring plate 3 from tipping over. After the connecting rod 8 and the bottom of the support rod 2 are positioned and fixed, rotate the measuring plate 3 to connect the top of the support rod 2 to the measuring plate 3.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present invention should be included in the protection scope of the present invention.

Claims

1. A three-coordinate measuring machine accuracy detection device, characterized in that: It includes a base, a support rod, a measuring plate, a gauge block fixing plate and a gauge block, and the gauge block is a rectangular parallelepiped structure; The base includes a bottom rod, which is a rectangular rod-shaped structure. A first mounting through hole is provided at the left end of the bottom rod and passes through the width direction of the bottom rod. A measuring plate mounting through hole is provided at the left end of the measuring plate at a position corresponding to the first mounting through hole and passes through the width direction of the measuring plate. A polished rod bolt passes through the first mounting through hole and the measuring plate mounting through hole. The screw end of the polished rod bolt is tightened with a nut to connect the bottom rod and the measuring plate together. The support rod is detachably connected between the bottom rod and the measuring plate, the bottom of the support rod is connected to the bottom rod, and the top of the support rod is connected to the measuring plate; The gauge block fixing plate is fixedly arranged above the measuring plate, and a plurality of sections perpendicular to the length direction of the gauge block fixing plate are arranged on the gauge block fixing plate, each section is at a different distance from the left end of the gauge block fixing plate, and each section forms a vertical corner with the side wall of the adjacent section and the upper surface of the measuring plate, the gauge block is placed on the upper surface of the measuring plate, and the left end of the gauge block is placed in the vertical corner; A groove is provided on the bottom rod, and the bottom rod includes a first bottom rod and a second bottom rod arranged in parallel; the support rod includes a first support rod and a second support rod, which are respectively located outside the first bottom rod and the second bottom rod; and a positioning hole is provided on the side wall of the measuring plate; The number of the grooves is 3, which are the first groove, the second groove and the third groove from the left end to the right end of the bottom rod; the number of the positioning holes is 3, which are the first positioning hole, the second positioning hole and the third positioning hole from the left end to the right end of the measuring plate; The length between the top mounting through hole and the bottom mounting through hole on the support rod is x; The distance between the first mounting through hole and the first groove on the bottom rod is x / tan60°, the distance between the first mounting through hole and the second groove on the bottom rod is x / tan45°, and the distance between the first mounting through hole and the third groove on the bottom rod is x / tan30°; The distance between the measuring plate mounting through hole and the first positioning hole on the measuring plate is x / sin60°, the distance between the measuring plate mounting through hole and the second positioning hole on the measuring plate is x / sin45°, and the distance between the measuring plate mounting through hole and the third positioning hole on the measuring plate is x / sin30°; A gauge block fixing plate and a stopper are fixedly connected in sequence above the left end of the measuring plate. The stopper is a rectangular parallelepiped structure. The widths of the measuring plate, the gauge block fixing plate and the stopper are equal.

2. The three-coordinate measuring machine accuracy detection device according to claim 1, characterized in that: Along the width direction of the gauge block fixing plate, the distance between the cross section and the left end of the gauge block fixing plate increases or decreases in sequence.

3. The three-coordinate measuring machine accuracy detection device according to claim 1, characterized in that: A top mounting through hole is arranged on the top of the support rod, and a bolt passes through the top mounting through hole and the positioning hole to connect the support rod and the measuring plate together.

4. The three-coordinate measuring machine accuracy detection device according to claim 3, characterized in that: A connecting rod is provided on the base, and the connecting rod includes a center rod and connecting parts integrally formed at both ends of the center rod. The center rod is a cylindrical structure, and the connecting part is a cylindrical structure with an internal threaded hole at the end. The length of the connecting part is equal to the width of the bottom rod, the length of the center rod is equal to the spacing between the first bottom rod and the second bottom rod, and the outer diameter of the connecting part is equal to the width of the groove set on the bottom rod and is smaller than the outer diameter of the center rod; the connecting rod is erected between the first bottom rod and the second bottom rod, and the connecting parts at both ends of the connecting rod are respectively located in the groove of the first bottom rod and the groove of the second bottom rod; a bottom mounting through hole is provided at the bottom of the support rod, and a bolt passes through the bottom mounting through hole and the internal threaded hole at the end of the connecting rod to connect the bottom of the support rod with the connecting rod.

5. The three-coordinate measuring machine accuracy detection device according to claim 4, characterized in that: The measuring plate is located between the first bottom bar and the second bottom bar, and the width of the measuring plate is equal to the distance between the first bottom bar and the second bottom bar.

6. The three-coordinate measuring machine accuracy detection device according to claim 5, characterized in that: A support block is fixedly connected to the right end between the first bottom bar and the second bottom bar, and the length of the support block is equal to the distance between the first bottom bar and the second bottom bar.

7. The three-coordinate measuring machine accuracy detection device according to claim 1, characterized in that: The gauge block is made of magnetic alloy material. On the measuring plate, magnet placement holes are provided along the length direction of each section of the gauge block fixing plate, and magnets are provided in the magnet placement holes.

8. The three-coordinate measuring machine accuracy detection device according to claim 7, characterized in that: The number of magnet placement holes provided on the measuring plate along the length direction of each section is ≥2.

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