Three-coordinate measuring machine for brake disc production

Abstract

The invention relates to the technical field of laser measurement, in particular to a three-coordinate measuring machine for brake disc production, which comprises a measuring table, the upper part of the measuring table is connected with a laser measuring head through a three-axis moving mechanism, the upper surface of the measuring table is provided with a round opening, and the lower surface of the measuring table is connected with a lifting plate through a lifting mechanism. The upper surface of the lifting plate is fixedly connected with a connecting column, the upper end of the connecting column is slidably sleeved with a sleeve through a first elastic mechanism, the upper end of the sleeve is fixedly connected with a large limiting block, and the connecting column is slidably sleeved with a lantern ring through a second elastic mechanism. And after the upper surface and the lower surface are respectively positioned, it is ensured that the position of the brake disc is fixed in two times of measurement, the measurement is standard 180-degree turn-over measurement, and the measurement precision is effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of laser measurement technology, and in particular to a three-coordinate measuring machine for brake disc production. Background Art

[0002] A coordinate measuring machine (CMM) is a high-precision, versatile device for measuring geometric dimensions and shapes, widely used in machinery manufacturing, automotive, aerospace, electronics, molds, and other fields. By measuring the three-dimensional coordinates of points on an object's surface, it enables high-precision measurement of the size, shape, position, and geometric tolerances of complex parts.

[0003] Brake disc surface parameters such as thickness, diameter, and end face runout must strictly comply with design standards. Using a three-dimensional coordinate measuring machine (CMM) to measure both the upper and lower surfaces is essential to ensure they meet design specifications and industry standards. Maintaining consistent positioning when measuring both surfaces is crucial to eliminate clamping errors and repeated positioning deviations, thereby ensuring accurate and comparable measurement results. However, existing measurement techniques make it difficult to ensure consistent positioning of the brake disc after placement. Furthermore, the need to avoid obstructions during measurement makes it difficult to use a flip fixture to position the disc for auxiliary measurement. Therefore, a CMM for brake disc production was proposed. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a three-coordinate measuring machine for brake disc production.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a three-coordinate measuring machine for brake disc production, comprising a measuring table, a laser measuring head is connected to the top of the measuring table through a three-axis moving mechanism, a circular opening is opened on the upper surface of the measuring table, and a lifting plate is connected to the lower surface of the measuring table through a lifting mechanism, the upper surface of the lifting plate is fixedly connected to a connecting column, the upper end of the connecting column is provided with a sleeve through a first elastic mechanism sliding sleeve, the upper end of the sleeve is fixedly connected to a large limit block, the connecting column is provided with a ring through a second elastic mechanism sliding sleeve, one side of the ring is connected to an L-shaped rod through a distance adjustment mechanism, the upper end of the L-shaped rod is fixedly connected to a small limit block, the other side of the ring is provided with a rotating mechanism, and a tightening mechanism is provided on the inner side of the connecting column, and the tightening mechanism tightens the sleeve and the inner wall of the ring when it is opened.

[0006] Preferably, the lifting mechanism includes bending plates fixedly connected to both sides of the lifting plate, the upper surface of one bending plate is fixedly connected to the telescopic end of the vertical cylinder, the upper surface of the other bending plate is fixedly connected to a guide column, the upper end sliding sleeve of the guide column is provided with a guide cylinder, and the guide cylinder and the upper end of the vertical cylinder are respectively fixedly connected to the lower surface of the measuring platform.

[0007] Preferably, the first elastic mechanism includes a socket opened on the upper surface of the connecting column, the inner top surface of the sleeve is fixedly connected to the plug column, the plug column is slidably inserted into the inner side of the socket, and the lower end of the plug column is fixedly connected to an anti-slip disk, the anti-slip disk slides in cooperation with the socket, the lower surface of the anti-slip disk is fixedly connected to a compression spring, and the lower end of the compression spring is fixedly connected to the inner bottom surface of the socket.

[0008] Preferably, the second elastic mechanism includes a sleeve spring mounted on the outer surface of the connecting column, the upper and lower ends of the sleeve spring are respectively fixed to the lower end of the sleeve ring and the lower end of the connecting column, a limiting ring is provided on the lower surface of the sleeve ring, and the upper end of the sleeve spring is located on the inner side of the limiting ring.

[0009] Preferably, the distance adjustment mechanism includes a transverse block fixedly connected to one side surface of the ring, one end of the L-shaped rod is slidably inserted into the inner side of the transverse block, a transverse cylinder is fixedly embedded on the inner side of the transverse block, and the telescopic end of the transverse cylinder is fixedly connected to one end surface of the L-shaped rod.

[0010] Preferably, the rotating mechanism includes a transmission gear column rotatably mounted on the upper surface of the lifting plate, a plurality of transmission teeth are provided on the outer surface of the collar, the transmission teeth are engaged with the transmission gear column, a servo motor is fixedly mounted on the lower surface of the lifting plate, and the output shaft of the servo motor is fixedly connected to the lower end of the transmission gear column.

[0011] Preferably, the tightening mechanism includes sliding grooves on the two side surfaces of the connecting column, a tightening block is slidably inserted into the inner side of the sliding groove, the lower end of the tightening block is fixedly connected to a moving block, the lower edge of the moving block is provided with a first inclined surface, and a pushing block is slidably inserted into the lower surface of the lifting plate, and the two upper edges of the pushing block are respectively provided with a second inclined surface, the second inclined surface is in contact with the first inclined surface, the lower end surface of the pushing block is fixedly connected to the telescopic end of the lifting cylinder, the lower end of the lifting cylinder is fixedly connected to the L-shaped plate, and the upper end of the L-shaped plate is fixedly connected to the lower surface of the lifting plate.

[0012] Preferably, the outer surface of the large limiting block is provided with a first limiting surface, and the outer surface of the small limiting block is provided with a second limiting surface.

[0013] Preferably, the three-axis moving mechanism includes a base fixedly arranged on the lower surface of the measuring platform, the upper surface of the base is connected to the Z-direction servo moving mechanism through the Y-direction servo moving mechanism, and the front surface of the Z-direction servo moving mechanism is connected to the rear surface of the laser measuring head through the X-direction servo moving mechanism.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. During measurement, the present invention utilizes the center opening and mounting holes on the brake disc to assist in accurate positioning of the brake disc, thereby facilitating laser measurement.

[0016] 2. After the laser measuring head completes the measurement of one side of the brake disc, control the vertical cylinder to extend so that the lifting plate moves down, and then turn the brake disc over. Then control the vertical cylinder to retract so that the large limit block is stuck in the other side port of the brake disc center hole, and the small limit block is stuck in the other side port of the brake disc mounting hole. Since the small limit block has completed the positioning in the measurement of the first side, the brake disc is slightly adjusted and rotated in the measurement of this side to ensure that the original brake disc mounting hole is aligned with the small limit block. After positioning, ensure that the brake disc position is fixed in the two measurements, which is a standard 180-degree flip measurement, effectively improving the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a three-coordinate measuring machine for brake disc production according to the present invention;

[0018] Figure 2 This is a schematic diagram of a measuring table of a three-coordinate measuring machine for brake disc production according to the present invention from a bottom perspective;

[0019] Figure 3 This is a cross-sectional view of a measuring table of a three-coordinate measuring machine for brake disc production according to the present invention;

[0020] Figure 4 The present invention is a three-coordinate measuring machine for brake disc production Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 The present invention is a three-coordinate measuring machine for brake disc production Figure 3 Enlarged view of point B in the middle;

[0022] Figure 6 This is a schematic diagram of a collar portion of a three-coordinate measuring machine for brake disc production according to the present invention;

[0023] Figure 7 This is a schematic diagram of the connection column of a three-coordinate measuring machine for brake disc production according to the present invention;

[0024] Figure 8 This is a schematic diagram of a three-coordinate measuring machine used for brake disc production during measurement according to the present invention;

[0025] Figure 9 The local state of the three-coordinate measuring machine used for brake disc production during measurement of the present invention Figure 1 ;

[0026] Figure 10The local state of the three-coordinate measuring machine used for brake disc production during measurement of the present invention Figure 2 .

[0027] Among them: 1. Measuring table; 2. Round mouth; 3. Lifting plate; 4. Connecting column; 5. Sliding groove; 6. Tightening block; 7. Moving block; 8. First inclined surface; 9. Pushing block; 10. Second inclined surface; 11. Sleeve; 12. Large limit block; 13. First limit surface; 14. Insert column; 15. Anti-slip plate; 16. Compression spring; 17. Socket; 18. Lifting cylinder; 19. L-shaped plate; 20. Ring; 21. Limiting ring; 2 2. Sleeve spring; 23. Transmission gear; 24. Transmission gear column; 25. Servo motor; 26. Cross-connecting block; 27. L-shaped rod; 28. Small limit block; 29. ​​Second limit surface; 30. Horizontal cylinder; 31. Bending plate; 32. Vertical cylinder; 33. Guide cylinder; 34. Guide column; 35. Base; 36. Y-axis servo moving mechanism; 37. Z-axis servo moving mechanism; 38. X-axis servo moving mechanism; 39. Laser measuring head. DETAILED DESCRIPTION

[0028] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0029] like Figures 1-10 A three-coordinate measuring machine for brake disc production is shown, including a measuring table 1, a laser measuring head 39 is connected to the top of the measuring table 1 through a three-axis moving mechanism, a circular opening 2 is opened on the upper surface of the measuring table 1, and a lifting plate 3 is connected to the lower surface of the measuring table 1 through a lifting mechanism, the upper surface of the lifting plate 3 is fixedly connected to a connecting column 4, the upper end of the connecting column 4 is provided with a sleeve 11 through a first elastic mechanism sliding sleeve, the upper end of the sleeve 11 is fixedly connected to a large limit block 12, the connecting column 4 is provided with a ring 20 through a second elastic mechanism sliding sleeve, one side of the ring 20 is connected to an L-shaped rod 27 through a distance adjustment mechanism, the upper end of the L-shaped rod 27 is fixedly connected to a small limit block 28, and a rotating mechanism is provided on the other side of the ring 20, and a tightening mechanism is provided on the inner side of the connecting column 4, which tightens the sleeve 11 and the inner wall of the ring 20 when the tightening mechanism is opened.

[0030] like Figure 2 As shown, the lifting mechanism includes bent plates 31 fixedly connected to either side of the lifting plate 3. The telescopic end of a vertical cylinder 32 is fixedly connected to the upper surface of one bent plate 31, while a guide post 34 is fixedly connected to the upper surface of the other bent plate 31. A guide cylinder 33 is slidably sleeved around the upper end of the guide post 34. The guide cylinder 33 and the upper end of the vertical cylinder 32 are respectively fixedly connected to the lower surface of the measuring platform 1. When the vertical cylinder 32 is extended or retracted, the guide post 34 slides up and down relative to the inner side of the guide cylinder 33, effectively ensuring the stability of the lifting plate 3 as it moves up and down.

[0031] like Figure 3 、 Figure 6 As shown, the first elastic mechanism includes a socket 17 formed on the upper surface of the connecting post 4. The inner top surface of the sleeve 11 is fixedly connected to the plug post 14, which slides into the inner side of the socket 17. The lower end of the plug post 14 is fixedly connected to an anti-slip disk 15, which slides in engagement with the socket 17. The lower surface of the anti-slip disk 15 is fixedly connected to a compression spring 16, the lower end of which is fixedly connected to the inner bottom surface of the socket 17. The anti-slip disk 15 can prevent the lower end of the plug post 14 from being disengaged from the inner side of the socket 17.

[0032] The second elastic mechanism includes a sleeve spring 22 sleeved on the outer surface of the connecting post 4. The upper and lower ends of the sleeve spring 22 are fixed to the lower ends of the collar 20 and the connecting post 4, respectively. A limit ring 21 is provided on the lower surface of the collar 20, and the upper end of the sleeve spring 22 is located inside the limit ring 21. The limit ring 21 improves the stability of the end position of the sleeve spring 22 and prevents excessive lateral displacement during extrusion.

[0033] like Figure 3 、 Figure 4 As shown, the distance adjustment mechanism includes a cross-connecting block 26 fixedly connected to one side of the collar 20. One end of an L-shaped rod 27 slides into the inner side of the cross-connecting block 26. A transverse cylinder 30 is fixedly mounted inside the cross-connecting block 26. The telescopic end of the transverse cylinder 30 is fixedly connected to one end of the L-shaped rod 27. The extension and contraction of the transverse cylinder 30 controls the lateral movement of the L-shaped rod 27, thereby changing the distance between the large stop block 12 and the small stop block 28.

[0034] like Figure 2 、 Figure 3 、 Figure 6 As shown, the rotation mechanism includes a transmission gear column 24 rotatably mounted on the upper surface of the lifting plate 3. A plurality of transmission teeth 23 are provided on the outer surface of the collar 20, which mesh with the transmission gear column 24. A servo motor 25 is fixedly mounted on the lower surface of the lifting plate 3, and the output shaft of the servo motor 25 is fixedly connected to the lower end of the transmission gear column 24. As the collar 20 moves up and down, the transmission teeth 23 can slide up and down relative to the transmission gear column 24. When the transmission gear column 24 rotates, the transmission teeth 23 will rotate.

[0035] like Figure 3 、 Figure 5 、 Figure 7As shown, the tightening mechanism includes a sliding groove 5 formed on both sides of the connecting column 4. A tightening block 6 is slidably inserted into the inner side of the sliding groove 5. A moving block 7 is fixedly connected to the lower end of the tightening block 6. A first inclined surface 8 is formed on the lower edge of the moving block 7. A pushing block 9 is slidably inserted into the lower surface of the lifting plate 3. The two upper edges of the pushing block 9 are respectively formed with a second inclined surface 10, which contacts the first inclined surface 8. The lower end surface of the pushing block 9 is fixedly connected to the telescopic end of the lifting cylinder 18. The lower end of the lifting cylinder 18 is fixedly connected to an L-shaped plate 19, and the upper end of the L-shaped plate 19 is fixedly connected to the lower surface of the lifting plate 3. When the lifting cylinder 18 extends, the pushing block 9 moves upward, and the first inclined surface 8 and the second inclined surface 10 push each other, thereby causing the two tightening blocks 6 to be stretched toward the sides, thereby tightening the sleeve 11 and the ring 20.

[0036] like Figure 3 、 Figure 6 As shown, the outer surface of the large limiting block 12 is provided with a first limiting surface 13, and the outer surface of the small limiting block 28 is provided with a second limiting surface 29. The first limiting surface 13 and the second limiting surface 29 can be more tightly inserted into the center opening and the inner side of the mounting hole.

[0037] like Figure 1 As shown, the three-axis motion mechanism includes a base 35 fixedly mounted on the lower surface of the measuring table 1. The upper surface of the base 35 is connected to the Z-direction servo motion mechanism 37 via the Y-direction servo motion mechanism 36. The front surface of the Z-direction servo motion mechanism 37 is connected to the rear surface of the laser measuring head 39 via the X-direction servo motion mechanism 38. The Y-direction servo motion mechanism 36, the Z-direction servo motion mechanism 37, and the X-direction servo motion mechanism 38 are all screw-slide structures, which are conventional in the art, and their specific structures will not be described in detail.

[0038] Before measurement, first control the extension and contraction of the horizontal cylinder 30 so that the distance from the center axis of the small limit block 28 to the center axis of the large limit block 12 is the same as the distance from the center opening of the standard brake disc to the mounting hole. After that, the user places the brake disc on the upper surface of the measuring table 1, and then controls the vertical cylinder 32 to move upward until the large limit block 12 is stuck in the center opening of the brake disc, that is, the first limit surface 13 is against the center opening of the brake disc. During the rising process, after the large limit block 12 is affected by the gravity of the brake disc, the plug post 14 will move downward relative to the inner side of the socket 17, squeezing the compression spring 16, and the brake disc will not be lifted up. At the same time, after the small limit block 28 contacts the lower surface of the brake disc, the collar 20 will slide down relative to the surface of the connecting column 4, squeezing the sleeve spring 22. When the lifting plate 3 stops rising, the servo motor 25 is operated to rotate the transmission gear column 24. With the cooperation of the transmission gear 23, the collar 20 and the L-shaped rod 27 are rotated, so that the small limit block 28 is stuck in the inner side of the brake disc mounting hole, and then the horizontal cylinder 30 is controlled to perform telescopic fine-tuning to ensure that the second limit surface 29 is stuck in the brake disc mounting hole, completing the measurement and positioning, which can assist in the precise arrangement and positioning of the brake disc and facilitate the laser measurement.

[0039] After the laser measuring head 39 completes the measurement of one side of the brake disc, the vertical cylinder 32 is controlled to extend so that the lifting plate 3 moves down, and then the brake disc is turned over. Then, the vertical cylinder 32 is controlled to contract so that the large limit block 12 is stuck in the other side port of the brake disc center hole, and the small limit block 28 is stuck in the other side port of the brake disc mounting hole. Since the small limit block 28 has completed the positioning in the measurement of the first side, the brake disc is slightly adjusted and rotated in the measurement of this side to ensure that the original brake disc mounting hole is aligned with the small limit block 28. After positioning, ensure that the brake disc position is constant in the two measurements, which is a standard 180-degree flip measurement, effectively improving the measurement accuracy.

[0040] After the large limit block 12 and the small limit block 28 are positioned, the lifting cylinder 18 is controlled to extend, so that the pushing block 9 moves up, squeezing the moving block 7, and then the two tightening blocks 6 tighten the sleeve 11 and the ring 20, ensuring the stability of the large limit block 12 and the small limit block 28, and preventing jitter problems from occurring during measurement by the laser measuring head 39, which affects the measurement accuracy.

[0041] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-coordinate measuring machine for brake disc production, comprising a measuring table (1), characterized in that: A laser measuring head (39) is connected to the top of the measuring platform (1) through a three-axis moving mechanism, a circular opening (2) is opened on the upper surface of the measuring platform (1), a lifting plate (3) is connected to the lower surface of the measuring platform (1) through a lifting mechanism, a connecting column (4) is fixedly connected to the upper surface of the lifting plate (3), the upper end of the connecting column (4) is provided with a sleeve (11) through a first elastic mechanism sliding sleeve, the upper end of the sleeve (11) is fixedly connected to a large limit block (12), the connecting column (4) is provided with a ring (20) through a second elastic mechanism sliding sleeve, one side of the ring (20) is connected to an L-shaped rod (27) through a distance adjustment mechanism, the upper end of the L-shaped rod (27) is fixedly connected to a small limit block (28), the other side of the ring (20) is provided with a rotating mechanism, and a tightening mechanism is provided on the inner side of the connecting column (4), and when the tightening mechanism is opened, the sleeve (11) and the inner wall of the ring (20) are tightened.

2. The three-coordinate measuring machine for brake disc production according to claim 1, characterized in that: The lifting mechanism comprises bending plates (31) respectively fixedly connected to both sides of the lifting plate (3), the upper surface of one bending plate (31) being fixedly connected to the telescopic end of the vertical cylinder (32), and the upper surface of the other bending plate (31) being fixedly connected to the guide column (34), the upper end of the guide column (34) being slidably sleeved with a guide cylinder (33), and the upper end of the guide cylinder (33) and the upper end of the vertical cylinder (32) being fixedly connected to the lower surface of the measuring platform (1).

3. The three-coordinate measuring machine for brake disc production according to claim 1, characterized in that: The first elastic mechanism includes a socket (17) provided on the upper surface of the connecting column (4), the inner top surface of the sleeve (11) is fixedly connected to the plug column (14), the plug column (14) is slidably inserted into the inner side of the socket (17), and the lower end of the plug column (14) is fixedly connected to an anti-slip disk (15), the anti-slip disk (15) is slidably matched with the socket (17), the lower surface of the anti-slip disk (15) is fixedly connected to a compression spring (16), and the lower end of the compression spring (16) is fixedly connected to the inner bottom surface of the socket (17).

4. The three-coordinate measuring machine for brake disc production according to claim 1, characterized in that: The second elastic mechanism comprises a sleeve spring (22) sleeved on the outer surface of the connecting column (4), the upper and lower ends of the sleeve spring (22) are respectively fixed to the lower end of the sleeve ring (20) and the lower end of the connecting column (4), a limiting ring (21) is provided on the lower surface of the sleeve ring (20), and the upper end of the sleeve spring (22) is located on the inner side of the limiting ring (21).

5. The three-coordinate measuring machine for brake disc production according to claim 1, characterized in that: The distance adjustment mechanism comprises a transverse block (26) fixedly connected to one side surface of the collar (20), one end of the L-shaped rod (27) is slidably inserted into the inner side of the transverse block (26), a transverse cylinder (30) is fixedly embedded in the inner side of the transverse block (26), and the telescopic end of the transverse cylinder (30) is fixedly connected to one end surface of the L-shaped rod (27).

6. The three-coordinate measuring machine for brake disc production according to claim 1, characterized in that: The rotating mechanism comprises a transmission tooth column (24) rotatably mounted on the upper surface of the lifting plate (3); a plurality of transmission teeth (23) are provided on the outer surface of the collar (20); the transmission teeth (23) are meshed with the transmission tooth column (24); a servo motor (25) is fixedly mounted on the lower surface of the lifting plate (3); and an output shaft of the servo motor (25) is fixedly connected to the lower end of the transmission tooth column (24).

7. The three-coordinate measuring machine for brake disc production according to claim 1, characterized in that: The tightening mechanism includes a sliding groove (5) provided on both side surfaces of the connecting column (4), a tightening block (6) is slidably inserted into the inner side of the sliding groove (5), a moving block (7) is fixedly connected to the lower end of the tightening block (6), a first inclined surface (8) is provided on the lower edge of the moving block (7), a pushing block (9) is slidably inserted into the lower surface of the lifting plate (3), two upper sides of the pushing block (9) are respectively provided with second inclined surfaces (10), the second inclined surfaces (10) are in contact with the first inclined surface (8), the lower end surface of the pushing block (9) is fixedly connected to the telescopic end of the lifting cylinder (18), the lower end of the lifting cylinder (18) is fixedly connected to the L-shaped plate (19), and the upper end of the L-shaped plate (19) is fixedly connected to the lower surface of the lifting plate (3).

8. The three-coordinate measuring machine for brake disc production according to claim 1, characterized in that: The outer surface of the large limiting block (12) is provided with a first limiting surface (13), and the outer surface of the small limiting block (28) is provided with a second limiting surface (29).

9. The three-coordinate measuring machine for brake disc production according to claim 1, characterized in that: The three-axis moving mechanism comprises a base (35) fixedly arranged on the lower surface of the measuring platform (1); the upper surface of the base (35) is connected to a Z-direction servo moving mechanism (37) via a Y-direction servo moving mechanism (36); and the front surface of the Z-direction servo moving mechanism (37) is connected to the rear surface of a laser measuring head (39) via an X-direction servo moving mechanism (38).

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