Device and method for detecting parallelism of guide rails of vertical column moving planer type milling machine

Abstract

The guide rail parallelism detection device comprises a base, a support is fixed to the top of the base, an interferometer is installed on the top of the support, the base is of an n-shaped structure, and an anti-backlash adjusting device assembly is installed at the bottom of the left side of the base. A pressing plate is fixed to the bottom of the right side of the anti-backlash adjusting device assembly and the bottom of the right side of the base, and rolling supports are installed on the bottom face of the base, the inner side face of the right side of the base and the upper face of the pressing plate. An interferometer is mounted at the top of the detection device on the reference guide rail, a reflector is mounted at the top of the detection device on the auxiliary guide rail, the two detection devices and a planer type milling machine are connected and fixed, the two detection devices move along with the planer type milling machine, and the distance between the reference guide rail and the auxiliary guide rail is measured and recorded according to the reading of the interferometer every time the two detection devices move by a certain distance. The straightness of the two guide rails can be obtained through multi-point measurement on the overall length of the guide rails.

Description

Technical Field

[0001] The invention belongs to the technical field of metal cutting equipment detection, and relates to a device and a method for detecting the parallelism of guide rails of a column moving gantry milling machine. Background Art

[0002] At present, various types of CNC column moving gantry milling machines have been widely used in the metal processing industry to achieve rough, semi-finishing and finishing of various high-precision parts with complex structures such as casting, forging and welding. The machine tools have functions such as milling, boring, drilling, reaming, tapping, expanding and countersinking; equipped with various accessory milling heads, it can realize one-time clamping of workpieces, multi-faceted processing, and multi-purpose of one machine; it has the advantages of saving process equipment, shortening production preparation cycle, improving work efficiency, reducing production costs, etc., and obtaining good economic benefits.

[0003] Although CNC column moving gantry milling machines bring many benefits, their two guide rails have a large span and will deform after working for a period of time, causing their straightness to be out of tolerance, which will have a negative impact on the performance and stability of the equipment, and cause the column moving gantry milling machine to vibrate or shake during operation. This instability will not only directly affect the positioning accuracy and repeated positioning accuracy of the equipment, and then affect the dimensional accuracy and surface quality of the parts processed by the equipment, and cannot meet the high-precision processing requirements of the CNC column moving gantry milling machine, but will also cause uneven contact between the equipment and the guide rails, causing certain parts to be subjected to excessive pressure or friction, accelerating the wear of the guide rails and equipment, and shortening the service life of the equipment.

[0004] When the guide rails of a CNC column moving gantry milling machine are deformed, since the span of the two guide rails of the column moving gantry milling machine is particularly large, and there is currently no tooling and measuring tools to measure the parallelism of the two guide rails, the traditional method of measuring the parallelism of the two guide rails is not only time-consuming and labor-intensive, but also affects the production process. It can be seen that quickly, simply and accurately measuring the straightness of the two guide rails of a column moving gantry milling machine has become a technical problem that urgently needs to be solved. Summary of the invention

[0005] One purpose of the present invention is to provide a device for detecting the parallelism of guide rails of a column moving gantry milling machine, which solves the problem that the existing tools have a complicated operation process, are time-consuming and labor-intensive when measuring the straightness of two guide rails of a column moving gantry milling machine.

[0006] Another object of the present invention is to provide a method for detecting the parallelism of guide rails of a column-moving gantry milling machine.

[0007] The first technical solution adopted by the present invention is a device for detecting the parallelism of guide rails of a column-moving gantry milling machine, comprising a base, a bracket fixed on the top of the base, a laser interferometer installed on the top of the bracket, the base being an "n"-shaped structure, and rolling supports B, C, K and S are installed on the bottom surface, and anti-backlash adjustment device components A and B with the same structure are installed on the two ends of the bottom left side of the base respectively, and rolling supports D and M are installed on the right sides of the anti-backlash adjustment device components A and B respectively, rolling supports A and H are installed on the inner side surface of the right side of the base, and an "L"-shaped pressure plate is fixed to the bottom right side, and rolling supports E and N are installed on the pressure plate.

[0008] The anti-backlash adjustment device assembly A and the anti-backlash adjustment assembly B are both composed of a wedge-shaped anti-backlash adjustment body, an anti-backlash wedge, an adjustment screw and a fastening screw N. The anti-backlash adjustment body and the anti-backlash wedge are connected and fixed by the fastening screw N. The adjustment screw passes through the anti-backlash adjustment body and is threadedly connected to the anti-backlash adjustment body. The screw end of the adjustment screw is against the side of the anti-backlash wedge.

[0009] The anti-backlash adjustment body and the anti-backlash wedge are connected and fixed by two symmetrically arranged fastening screws N, and the adjustment screw is located between the two fastening screws N.

[0010] The anti-backlash adjustment body and the base in the anti-backlash adjustment device assembly A and the anti-backlash adjustment device assembly B are fastened and connected by fastening bolts C, the anti-backlash wedge block and the rolling support D in the anti-backlash adjustment device assembly A are connected and fixed by fastening screws D, and the anti-backlash wedge block and the rolling support M in the anti-backlash adjustment device assembly B are connected and fixed by fastening screws S.

[0011] The rolling support A, the rolling support D, the rolling support H and the rolling support M are located on the same horizontal plane.

[0012] An adjustment pad A is installed between the pressure plate and the rolling support E, and an adjustment pad B is installed between the pressure plate and the rolling support N.

[0013] The rolling support C comprises an intermediate support body, rollers are installed on opposite sides of the intermediate support body, a fixed shaft is installed inside the roller, and a bearing is installed between the fixed shaft and the roller.

[0014] The structures of rolling support B, rolling support K, rolling support S, rolling support D, rolling support M, rolling support A, rolling support H, rolling support E and rolling support N are the same as those of rolling support C.

[0015] The second technical solution adopted by the present invention is a detection method using a column moving gantry milling machine guide rail parallelism detection device, comprising the following steps: Step 1, adjust the straightness of the reference guide rail in the column moving gantry milling machine to the standard qualified requirement; Step 2, respectively install parallelism detection devices on the reference guide rail and the auxiliary guide rail in the column moving gantry milling machine, the top of the parallelism detection device on the reference guide rail is installed with a laser interferometer, and the top of the parallelism detection device on the auxiliary guide rail is installed with a reflector, and the two parallelism detection devices are connected and fixed to the gantry milling machine; Step 3, start the column moving gantry milling machine, and the two parallelism detection devices move together with the milling machine. Every time they move a certain distance, the distance between the reference guide rail and the auxiliary guide rail is measured and recorded according to the laser interferometer reading. Multiple points are measured along the entire length of the guide rail to obtain the straightness of the two guide rails.

[0016] The beneficial effects of the present invention are that a guide rail parallelism detection device for a column moving gantry milling machine is formed by a base, a bracket, a laser interferometer, an anti-backlash adjustment device assembly and a plurality of rolling supports, the structure is simple and the manufacturing is convenient; when detecting the guide rail parallelism of the column moving gantry milling machine, parallelism detection devices are respectively installed on a reference guide rail and an auxiliary guide rail in the column moving gantry milling machine, a laser interferometer is installed on the top of the parallelism detection device on the reference guide rail, a reflector is installed on the top of the parallelism detection device on the auxiliary guide rail, the two parallelism detection devices are connected and fixed to the gantry milling machine, the column moving gantry milling machine is started, the two parallelism detection devices move together with the machine, each time they move a certain distance, the distance between the reference guide rail and the auxiliary guide rail is measured and recorded according to the reading of the laser interferometer, and the straightness of the two guide rails is obtained by multi-point measurement on the entire length of the guide rail, thereby improving the method, which can quickly, simply and accurately measure the straightness of the two guide rails, reduce the labor intensity and maintenance costs of maintenance personnel, reduce the downtime of the machine tool, and reduce the economic losses caused by downtime. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of a guide rail parallelism detection device for a column-moving gantry milling machine of the present invention; Figure 2 It is a top view of the guide rail parallelism detection device of the column moving gantry milling machine of the present invention; Figure 3 It is a left view of the guide rail parallelism detection device of the column moving gantry milling machine of the present invention; Figure 4 It is a structural diagram of the anti-backlash adjustment device assembly in the guide rail parallelism detection device of the column moving gantry milling machine of the present invention; Figure 5 yes Figure 4 AA section view; Figure 6 yes Figure 4 BB cross-sectional view; Figure 7 It is a schematic diagram of a detection method of a guide rail parallelism detection device for a column moving gantry milling machine of the present invention.

[0018] In the figure, 1. base, 2. fastening screw A, 3. rolling support A, 4. rolling support B, 5. fastening screw B, 6. fastening bolt A, 7. bracket, 8. laser interferometer, 9. fastening screw C, 10. rolling support C, 11. anti-backlash adjustment device assembly A, 12. fastening screw D, 13. rolling support D, 14. rolling support E, 15. fastening screw E, 16. adjustment pad A, 17. fastening bolt B, 18. pressure plate, 19. anti-backlash adjustment device assembly B, 20. reflection Mirror, 21. Fastening screw F, 22. Rolling support H, 23. Rolling support K, 24. Rolling support S, 25. Rolling support M, 26. Fastening screw S, 27. Fastening screw L, 28. Rolling support N, 29. Fastening screw M, 30. Adjustment pad B, 31. Anti-backlash adjustment body, 32. Adjustment screw, 33. Fastening bolt C, 34. Anti-backlash wedge, 35. Fastening screw N, 36. Reference guide rail, 37. Auxiliary guide rail, 101. Intermediate support body, 102. Roller. DETAILED DESCRIPTION

[0019] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Example 1 A device for detecting the parallelism of guide rails of a column-moving gantry milling machine, referring to Figure 1 and Figure 2 , including a base 1, which is an "n" type structure, with a bracket 7 fixed on the top of the base 1, and the bracket 7 is composed of a top plate, a bottom plate and four middle side plates welded and fixed, the base 1 and the bottom plate of the bracket 7 are connected and fixed by four fastening bolts A6 around, a laser interferometer 8 is installed on the top plate of the bracket 7, and the laser interferometer is a Renishaw XL80 laser interferometer, and rolling supports B4, rolling supports C10, rolling supports K23 and rolling supports S24 are installed on the four corners of the bottom surface of the base 1, the rolling support B4 is connected and fixed to the base 1 by fastening screws B5, the rolling support C10 is connected and fixed to the base 1 by fastening screws C9, the rolling support K23 is connected and fixed to the base 1 by fastening screws L27, and the rolling support S24 is connected and fixed to the base 1 by fastening screws Y.

[0021] See also Figure 3 and Figure 4The two ends of the left bottom of the base 1 are respectively installed with anti-backlash adjustment device components A11 and anti-backlash adjustment device components B19 with the same structure. The right sides of the anti-backlash adjustment device components A11 and B19 are respectively installed with rolling supports D13 and rolling supports M25. The inner side surface of the right side of the base 1 is installed with rolling supports A3 and H22. The rolling support A3 is connected and fixed to the base 1 by the fastening screw A2. The rolling support H22 is connected and fixed to the base 1 by the fastening screw F21. An "L"-shaped pressing plate 18 is fixed to the bottom of the right side of the base 1. The pressing plate 18 is installed with rolling supports E14 and N28. The rolling support E14 is connected and fixed to the pressing plate 18 by the fastening screw E15, and the rolling support N28 is connected and fixed to the pressing plate 18 by the fastening screw M29.

[0022] See also Figure 5 and Figure 6 The anti-backlash adjustment device assembly A11 and the anti-backlash adjustment assembly B19 are both composed of a wedge-shaped anti-backlash adjustment body 31, an anti-backlash wedge block 34, an adjustment screw 32 and a fastening screw N35. The anti-backlash adjustment body 31 and the anti-backlash wedge block 34 are connected and fixed by the fastening screw N35. The adjustment screw 32 passes through the anti-backlash adjustment body 31 and is threadedly connected to the anti-backlash adjustment body 31. The screw end of the adjustment screw 32 is against the side of the anti-backlash wedge block 34.

[0023] The backlash-eliminating adjustment body 31 and the backlash-eliminating wedge block 34 are connected and fixed by two symmetrically arranged fastening screws N35 , and the adjustment screw 32 is located between the two fastening screws N35 .

[0024] The anti-backlash adjustment body 31 in the anti-backlash adjustment device assembly A11 and the anti-backlash adjustment device assembly B19 are fastened to the base 1 by fastening bolts C33, the anti-backlash wedge block 34 in the anti-backlash adjustment device assembly A11 is connected and fixed to the rolling support D13 by fastening screws D12, and the anti-backlash wedge block 34 in the anti-backlash adjustment device assembly B19 is connected and fixed to the rolling support M25 by fastening screws S26.

[0025] Example 2 A device for detecting the parallelism of guide rails of a column-moving gantry milling machine comprises a base 1, a bracket 7 is fixed on the top of the base 1, a laser interferometer 8 is installed on the top of the bracket 7, the base 1 is an "n"-shaped structure, and rolling supports B4, C10, K23 and S24 are installed on the bottom surface, and anti-backlash adjustment device components A11 and B19 with the same structure are installed on the two ends of the left bottom of the base 1, and rolling supports D13 and M25 are installed on the right sides of the anti-backlash adjustment device components A11 and B19, respectively. Rolling supports A3 and H22 are installed on the inner side surface of the right side of the base 1, and an "L"-shaped pressing plate 18 is fixed to the bottom of the right side, and rolling supports E14 and N28 are installed on the pressing plate 18.

[0026] The anti-backlash adjustment device assembly A11 and the anti-backlash adjustment assembly B19 are both composed of a wedge-shaped anti-backlash adjustment body 31, an anti-backlash wedge block 34, an adjustment screw 32 and a fastening screw N35. The anti-backlash adjustment body 31 and the anti-backlash wedge block 34 are connected and fixed by the fastening screw N35. The adjustment screw 32 passes through the anti-backlash adjustment body 31 and is threadedly connected to the anti-backlash adjustment body 31. The screw end of the adjustment screw 32 is against the side of the anti-backlash wedge block 34.

[0027] The backlash-eliminating adjustment body 31 and the backlash-eliminating wedge block 34 are connected and fixed by two symmetrically arranged fastening screws N35 , and the adjustment screw 32 is located between the two fastening screws N35 .

[0028] The anti-backlash adjustment body 31 in the anti-backlash adjustment device assembly A11 and the anti-backlash adjustment device assembly B19 are fastened to the base 1 by fastening bolts C33, the anti-backlash wedge block 34 in the anti-backlash adjustment device assembly A11 is connected and fixed to the rolling support D13 by fastening screws D12, and the anti-backlash wedge block 34 in the anti-backlash adjustment device assembly B19 is connected and fixed to the rolling support M25 by fastening screws S26.

[0029] The rolling support A3 is arranged opposite to the rolling support D13, and the rolling supports H22 and M25 are arranged opposite to each other. The rolling support A3, the rolling support D13, the rolling support H22 and the rolling support M25 are located on the same horizontal plane.

[0030] An adjustment pad A16 is installed between the pressure plate 18 and the rolling support E14, and an adjustment pad B30 is installed between the pressure plate 18 and the rolling support N28. The gap between the rolling support E14, the rolling support N28 and the reference guide rail and the auxiliary guide rail can be adjusted by adjusting the thickness of the adjustment pad A16 and the adjustment pad B30.

[0031] The rolling support C10 includes an intermediate support body 101 , rollers 102 are installed on two opposite sides of the intermediate support body 101 , a fixed shaft is installed inside the roller 102 , and a bearing is installed between the fixed shaft and the roller 102 .

[0032] The structures of rolling support B4, rolling support K23, rolling support S24, rolling support D13, rolling support M25, rolling support A3, rolling support H22, rolling support E14 and rolling support N28 are the same as those of rolling support C10.

[0033] Example 3 A method for detecting the parallelism of guide rails of a column-moving gantry milling machine comprises the following steps: Step 1, adjusting the straightness of the reference guide rail 36 in the column moving gantry milling machine to the standard qualified requirement; Step 2: Install parallelism detection devices on the reference guide rail 36 and the auxiliary guide rail 37 in the column moving gantry milling machine respectively. The top of the parallelism detection device on the reference guide rail 36 is equipped with a laser interferometer 8, and the top of the parallelism detection device on the auxiliary guide rail 37 is equipped with a reflector 20. Connect and fix the two parallelism detection devices to the gantry milling machine. Figure 7 ; Step 3, start the column moving gantry milling machine, and the two parallelism detection devices move together with the milling machine. Every time they move a certain distance, the distance between the reference guide rail 36 and the auxiliary guide rail 37 is measured and recorded according to the reading of the laser interferometer 8. Multi-point measurements are made on the entire length of the guide rails to obtain the straightness of the two guide rails.

Claims

1. A device for detecting the parallelism of guide rails of a column-moving gantry milling machine, characterized in that: The invention comprises a base (1), a bracket (7) is fixed on the top of the base (1), a laser interferometer (8) is installed on the top of the bracket (7), the base (1) is an "n"-shaped structure, a rolling support B (4), a rolling support C (10), a rolling support K (23) and a rolling support S (24) are installed on the bottom surface, two ends of the left bottom of the base (1) are respectively installed with a backlash-eliminating adjustment device assembly A (11) and a backlash-eliminating adjustment device assembly B (19) with the same structure, and a rolling support D (13) and a rolling support M (25) are respectively installed on the right side of the backlash-eliminating adjustment device assembly A (11) and the backlash-eliminating adjustment device assembly B (19), a rolling support A (3) and a rolling support H (22) are installed on the inner side surface of the right side of the base (1), an "L"-shaped pressing plate (18) is fixed on the bottom of the right side, and a rolling support E (14) and a rolling support N (28) are installed on the pressing plate (18).

2. The device for detecting the parallelism of guide rails of a column-moving gantry milling machine according to claim 1, characterized in that: The anti-backlash adjustment device assembly A (11) and the anti-backlash adjustment assembly B (19) are both composed of a wedge-shaped anti-backlash adjustment body (31), an anti-backlash wedge block (34), an adjustment screw (32) and a fastening screw N (35). The anti-backlash adjustment body (31) and the anti-backlash wedge block (34) are connected and fixed by the fastening screw N (35). The adjustment screw (32) passes through the anti-backlash adjustment body (31) and is threadedly connected to the anti-backlash adjustment body (31). The screw end of the adjustment screw (32) is pressed against the side surface of the anti-backlash wedge block (34).

3. The device for detecting the parallelism of guide rails of a column-moving gantry milling machine according to claim 2, characterized in that: The backlash-eliminating adjustment body (31) and the backlash-eliminating wedge block (34) are connected and fixed by two symmetrically arranged fastening screws N (35), and the adjustment screw (32) is located between the two fastening screws N (35).

4. The device for detecting the parallelism of guide rails of a column-moving gantry milling machine according to claim 3, characterized in that: The anti-backlash adjustment body (31) in the anti-backlash adjustment device assembly A (11) and the anti-backlash adjustment assembly B (19) are fastened to the base (1) by means of a fastening bolt C (33); the anti-backlash wedge block (34) in the anti-backlash adjustment device assembly A (11) is connected and fixed to the rolling support D (13) by means of a fastening screw D (12); and the anti-backlash wedge block (34) in the anti-backlash adjustment assembly (19) is connected and fixed to the rolling support M (25) by means of a fastening screw S (26).

5. The device for detecting the parallelism of guide rails of a column-moving gantry milling machine according to claim 4, characterized in that: The rolling support A (3), the rolling support D (13), the rolling support H (22) and the rolling support M (25) are located on the same horizontal plane.

6. The device for detecting the parallelism of guide rails of a column-moving gantry milling machine according to claim 5, characterized in that: An adjustment pad A (16) is installed between the pressure plate (18) and the rolling support E (14), and an adjustment pad B (30) is installed between the pressure plate (18) and the rolling support N (28).

7. The device for detecting the parallelism of guide rails of a column-moving gantry milling machine according to claim 6, characterized in that: The rolling support C (10) comprises an intermediate support body (101), rollers (102) are installed on opposite sides of the intermediate support body (101), a fixed shaft is installed inside the roller (102), and a bearing is installed between the fixed shaft and the roller (102).

8. The device for detecting the parallelism of guide rails of a column-moving gantry milling machine according to claim 7, characterized in that: The rolling support B (4), rolling support K (23), rolling support S (24), rolling support D (13), rolling support M (25), rolling support A (3), rolling support H (22), rolling support E (14) and rolling support N (28) have the same structure as the rolling support C (10).

9. A detection method using the device for detecting the parallelism of guide rails of a column-moving gantry milling machine according to any one of claims 1 to 8, comprising the following steps: Step 1, adjusting the straightness of the reference guide rail (36) in the column moving gantry milling machine to the standard qualified requirement; Step 2, respectively installing parallelism detection devices on the reference guide rail (36) and the auxiliary guide rail (37) in the column moving gantry milling machine, wherein a laser interferometer (8) is installed on the top of the parallelism detection device on the reference guide rail (36), and a reflector (20) is installed on the top of the parallelism detection device on the auxiliary guide rail (37), and the two parallelism detection devices are connected and fixed to the gantry milling machine; Step 3, start the column moving gantry milling machine, and the two parallelism detection devices move together with the milling machine. Every time they move a certain distance, the distance between the reference guide rail (36) and the auxiliary guide rail (37) is measured and recorded according to the reading of the laser interferometer (8). Multiple points along the entire length of the guide rail are measured to obtain the straightness of the two guide rails.

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