Laser interferometer for machine tool calibration

Abstract

The utility model relates to the technical field of machine tool calibration, and discloses a laser interferometer for machine tool calibration, which comprises an interferometer main body, a laser channel is mounted in the middle of the interferometer main body, and an interface dustproof assembly for preventing dust from entering an interface of the interferometer main body is mounted on one side, far away from the laser channel, of the interferometer main body; and the protection assembly is used for preventing dust from entering the laser channel, the protection assembly comprises a shell, the shell is detachably connected to the outer wall of the laser channel, one side of the interior of the shell is rotationally connected with a release roller, and the other side of the interior of the shell is rotationally connected with a winding shaft. According to the utility model, dust does not enter the laser channel of the interferometer all the time, frequent wiping of the lens in the laser channel is avoided, the cleanliness of the lens is effectively improved, and the precision of the interferometer can be always kept in a stable range.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tool calibration, in particular to a laser interferometer for machine tool calibration. Background Art

[0002] A laser interferometer for machine tool calibration is a precision measuring device primarily used to calibrate and test the geometric and positioning accuracy of machine tools. By emitting a laser beam, the device utilizes the principle of optical interference to perform high-precision measurements of various machine tool parameters. Its structure typically consists of a laser transmitter, an optical interferometer unit, a reflector assembly, a receiver, and a data processing unit. Laser interferometers are widely used in high-precision applications such as mechanical manufacturing, precision machining, and aerospace, and are a key component in ensuring machine tool accuracy.

[0003] Existing laser interferometers used for machine tool calibration are susceptible to dust intrusion because the laser channel is typically exposed to air. Dust adheres to the lens surfaces within the laser channel, affecting not only the laser transmission accuracy but also the need for frequent lens cleaning, increasing maintenance workload. Furthermore, frequent cleaning can cause lens wear, affecting optical performance and making it difficult to maintain the laser interferometer's measurement accuracy within a stable range. Utility Model Content

[0004] In order to remedy the above shortcomings, the utility model provides a laser interferometer for machine tool calibration, which aims to improve the problem in the prior art that dust adheres to the lens surface in the laser channel, which not only affects the transmission accuracy of the laser, but also requires frequent cleaning of the lens, increasing the maintenance workload and affecting the optical performance of the interferometer lens.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a laser interferometer for machine tool calibration, comprising:

[0006] An interferometer body, wherein a laser channel is installed in the middle of the interferometer body, and an interface dustproof component is installed on a side of the interferometer body away from the laser channel for preventing dust from entering the interface of the interferometer body;

[0007] A protective component is used to prevent dust from entering the laser channel. The protective component includes a shell, which is detachably connected to the outer wall of the laser channel. A release roller is rotatably connected to one side of the shell, and a winding shaft is rotatably connected to the other side of the shell. A transparent film is wound between the release roller and the winding shaft. One end of the winding shaft passes through the shell and is fixedly connected to a ratchet. A fixing frame is fixedly connected to the top edge of the shell, and a connecting shaft is fixedly connected to the middle of the fixing frame. A pawl is rotatably connected to one side of the outside of the connecting shaft, and the pawl and the ratchet are engaged. A torsion spring is sleeved on the other side of the outside of the connecting shaft.

[0008] As a further description of the above technical solution:

[0009] The outer side of the transparent film is arranged inside a side of the laser channel away from the interferometer body.

[0010] As a further description of the above technical solution:

[0011] A friction block is fixedly connected to the inner bottom wall of the shell, and the outer side of the transparent film is penetrated into the interior of the friction block.

[0012] As a further description of the above technical solution:

[0013] One end of the torsion spring is fixedly connected to the inner wall of the connecting shaft, and the other end of the torsion spring is fixedly connected to the outer wall of the pawl.

[0014] As a further description of the above technical solution:

[0015] The interface dustproof component includes a bottom cover shell and a hinge. The front side of the bottom cover shell is fixedly connected to the rear side of the interferometer body, one side of the bottom of the hinge is fixedly connected to the top of the interferometer body, and the other side of the bottom of the hinge is fixedly connected to the top cover shell. A torsion spring 2 is provided inside the hinge. Fine soft hairs are fixedly connected between the bottom of the top cover shell and the top of the bottom cover shell. A locking component for locking the top cover shell is provided between the top of the top cover shell and the top of the interferometer body.

[0016] As a further description of the above technical solution:

[0017] The locking assembly includes a hook and a hanging ring. The bottom of the hook is fixedly connected to the top of the interferometer body, and the bottom of the hanging ring is fixedly connected to the top of the top cover, and the hook and the hanging ring are engaged with each other.

[0018] As a further description of the above technical solution:

[0019] Guide shafts are provided on both sides of the middle portion of the transparent film, and both ends of the guide shafts are rotatably connected to the interior of the shell.

[0020] As a further description of the above technical solution:

[0021] A supporting plate is fixedly connected to the rear side of the top cover.

[0022] The utility model has the following beneficial effects:

[0023] 1. In the present invention, the transparent film is wound up by rotating the winding shaft, so that the transparent film is pulled and released from the release roller. As the transparent film moves, a section located inside the laser channel will be wound up onto the winding shaft, and a new section released from the release roller will move into the laser channel, so that dust will never enter the laser channel. At the same time, it also avoids frequent wiping of the lens inside the laser channel, effectively improving the cleanliness of the lens, so that the accuracy of the interferometer can always be maintained within a stable range.

[0024] 2. In the present invention, by opening the top cover, the connected wiring harness and the slot on the rear side of the interferometer body are installed, and then the top cover is loosened. Under the action of the second torsion spring, the hinge is driven to rotate, and then the top cover and the bottom cover are reclosed together. The fine soft hair contacts the outer wall of the wiring harness to close the gap between the top cover and the hanging ring, preventing dust generated during the operation of the machine tool from entering the connection between the wiring harness and the interferometer, ensuring its stable operation and reducing unnecessary cleaning for subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A three-dimensional diagram of the laser interferometer for machine tool calibration proposed in the present invention;

[0026] Figure 2 This is a schematic diagram of the bottom cover structure of the laser interferometer for machine tool calibration proposed in the present invention;

[0027] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0028] Figure 4 This is a schematic diagram of the internal structure of the shell of the laser interferometer for machine tool calibration proposed by the present invention;

[0029] Figure 5 This is a schematic diagram of the transparent film of the laser interferometer for machine tool calibration proposed in the present invention;

[0030] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0031] Legend:

[0032] 1. Interferometer body; 2. Laser channel; 3. Housing; 4. Support plate; 5. Release roller; 6. Winding shaft; 7. Transparent film; 8. Ratchet; 9. Fixed frame; 10. Connecting shaft; 11. Pawl; 12. Torsion spring 1; 13. Guide shaft; 14. Friction block; 15. Hook; 16. Bottom cover; 17. Hinge; 18. Torsion spring 2; 19. Top cover; 20. Hanging ring; 21. Fine soft hair. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] Reference Figure 1 and Figure 2 The present invention provides an embodiment of a laser interferometer for machine tool calibration, comprising an interferometer body 1, with a laser channel 2 installed in the middle of the interferometer body 1. A laser beam emitted by a laser component within the interferometer body 1 passes through the laser channel 2 and irradiates the feedback component of the machine tool, thereby detecting and calibrating the machine tool position. An interface dustproof component is installed on the side of the interferometer body 1 away from the laser channel 2 to prevent dust from entering the interface of the interferometer body 1.

[0035] Reference Figure 1 、 Figure 4 、 Figure 5 and Figure 6, protective component, the protective component is used to prevent dust from entering the laser channel 2, the protective component includes a shell 3, the shell 3 is detachably connected to the outer wall of the laser channel 2, one side of the shell 3 is rotatably connected to a release roller 5, and the other side of the shell 3 is rotatably connected to a winding shaft 6, a transparent film 7 is wound between the release roller 5 and the winding shaft 6, and the transparent film 7 can be pulled and wound on the winding shaft 6 by rotating the handle on the outside of the winding shaft 6, so that the transparent film 7 can move the part of the shell 3 that is not stained with dust to the inside of the laser channel 2 when it moves. One end of the reel 6 passes through the housing 3 and is fixedly connected to the ratchet 8. The top edge of the housing 3 is fixedly connected to a fixing frame 9. The middle of the fixing frame 9 is fixedly connected to a connecting shaft 10. A pawl 11 is rotatably connected to one side of the external part of the connecting shaft 10. The pawl 11 is engaged with the ratchet 8. A torsion spring 12 is sleeved on the other side of the external part of the connecting shaft 10. The torsion spring 12 is in a tightened state, so that the torsion spring 12 can apply a downward torsional force to the pawl 11, ensuring that the pawl 11 can be tightly stuck on the outside of the ratchet 8 to prevent the ratchet 8 from rotating, while not affecting the forward rotation of the reel 6. The outside of the transparent film 7 is passed through the inside of the side of the laser channel 2 away from the interferometer body 1. The front end of the laser channel 2 is isolated by the transparent film 7 to prevent dust from directly adhering to the lens inside the laser channel 2, thereby avoiding the need to clean the lens inside the laser channel 2 and preventing damage to the lens. A friction block 14 is fixedly connected to the inner bottom wall of the shell 3, and the outer side of the transparent film 7 is passed through the friction block 14. The friction block 14 can apply resistance to the transparent film 7, ensuring that the transparent film 7 can be kept in a taut state when the transparent film 7 is wound, so that the transparent film 7 always remains flat, and the laser beam can stably pass through the transparent film 7. One end of the torsion spring 12 is fixedly connected to the inner wall of the connecting shaft 10, and the other end of the torsion spring 12 is fixedly connected to the outer wall of the pawl 11. The force applied by the torsion spring 12 to the pawl 11 clamps the pawl 11 and the ratchet 8 together, preventing the winding shaft 6 and the ratchet 8 from rotating and causing the wound transparent film 7 to be released, so that the transparent film 7 is in a relaxed state. Guide shafts 13 are provided on both sides of the middle of the transparent film 7, and both ends of the guide shaft 13 are rotatably connected to the inside of the shell 3. The guidance of the two guide shafts 13 can make the transparent film 7 stably and smoothly pass through the inside of the laser channel 2;

[0036] Since the housing 3 is detachably connected to the outer wall of the laser channel 2 , an operator can flexibly replace the internal transparent film 7 .

[0037] Reference Figure 1-Figure 3The interface dustproof assembly includes a bottom cover 16 and a hinge 17. The front side of the bottom cover 16 is fixedly connected to the rear side of the interferometer body 1. The wiring harness installed in the slot on the rear side of the interferometer body 1 will be placed on the top of the bottom cover 16. One side of the bottom of the hinge 17 is fixedly connected to the top of the interferometer body 1, and the other side of the bottom of the hinge 17 is fixedly connected to the top cover 19. A torsion spring 18 is provided inside the hinge 17. The torsion spring 18 is installed on the shaft inside the hinge 17, so that the two parts of the hinge 17 can move the torsion spring 18 when rotating. Fine soft hair 21 is fixedly connected between the bottom of the top cover 19 and the top of the bottom cover 16. The two sets of fine soft hair 21 can ensure that the gap between the bottom cover 16 and the top cover 19 is closed, preventing dust from entering the bottom cover 16 and the top cover 19. A locking assembly for locking the top cover 19 is provided between the top of the top cover 19 and the top of the interferometer body 1. The locking assembly includes a hook 15 and a loop 20. The bottom of the hook 15 is fixedly connected to the top of the interferometer body 1, and the bottom of the loop 20 is fixedly connected to the top of the top cover 19. The hook 15 and the loop 20 are engaged. When the loop 20 and the hook 15 are hooked, the open top cover 19 will not be rotated and closed with the bottom cover 16 by the action of the torsion spring 18, allowing workers to easily plug the wiring harness into the slot on the rear side of the interferometer body 1. The back side of the top cover 19 is fixedly connected to a support plate 4, which makes it easy for workers to open the top cover 19 and flip it upward.

[0038] Working principle: When using the interferometer, it is necessary to install the interferometer at the designated position of the machine tool to achieve real-time calibration and detection of the machine tool position. Then, the pallet 4 is moved to flip the top cover 19 upward and open it, and the hanging ring 20 and the hook 15 are hooked to fix the top cover 19. At this time, the torsion spring 2 18 on the inside of the hinge 17 is tightened due to the flipping of the hinge 17. After that, the worker plugs the wiring harness and the interface on the rear side of the interferometer body 1, loosens the hanging ring 20 and the hook 15, and under the action of the torsion force generated by the reset of the torsion spring 2 18, the top cover 19 is driven to flip downward and contact and close with the bottom cover 16. At this time, the connected wiring harness will be covered by the upper and lower groups of fine soft hair 21. Due to the soft characteristics of the fine soft hair 21, the fine soft hair 21 can seal the surface of the connected wiring harness, preventing dust from passing through the fine soft hair 21 and entering the interior of the bottom cover 16 and the top cover 19, thereby preventing dust from entering the interface of the interferometer body 1 and the connection between the wiring harness.

[0039] At the same time, as the machine tool is in operation and processing, dust or other particulate matter will adhere to the transparent film 7 inside the laser channel 2. The transparent film 7 isolates the dust from adhering to the lens inside the laser channel 2, ensuring that the laser emitted by the interferometer body 1 can accurately and unobstructedly pass through the laser channel 2 and contact the feedback structure on the machine tool, thereby realizing distance detection and calibration. When there is a lot of dust attached to the transparent film 7, the handle outside the reel 6 is rotated to reel the transparent film 7, so that the transparent film 7 will be reeled on the reel 6, and the transparent film 7 wound on the release roller 5 will also be released accordingly. At this time, the section of the transparent film 7 attached to the dust will be reeled on the reel 6, and a new section of clean transparent film 7 will enter the laser channel 2 for use. At the same time, the ratchet 8 and the fixing frame 9 cooperate to achieve self-locking of the reel 6, so that the reel 6 will not rotate after reeling to release the transparent film 7, ensuring that the transparent film 7 is always in a tensioned state and its flatness is guaranteed. The user does not need to regularly wipe the lens structure on the interferometer body 1, thereby preventing the lens from being worn and ensuring the accuracy of the laser interferometer.

[0040] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Laser interferometer for machine tool calibration, characterized in that: include: An interferometer body (1), wherein a laser channel (2) is installed in the middle of the interferometer body (1), and an interface dustproof component for preventing dust from entering the interface of the interferometer body (1) is installed on a side of the interferometer body (1) away from the laser channel (2); A protective component is used to prevent dust from entering the laser channel (2). The protective component includes a shell (3), the shell (3) is detachably connected to the outer wall of the laser channel (2), one side of the shell (3) is rotatably connected to a release roller (5), the other side of the shell (3) is rotatably connected to a reel-up shaft (6), a transparent film (7) is wound between the release roller (5) and the reel-up shaft (6), one end of the reel-up shaft (6) passes through the shell (3) and is fixedly connected to a ratchet (8), the top edge of the shell (3) is fixedly connected to a fixing frame (9), the middle part of the fixing frame (9) is fixedly connected to a connecting shaft (10), one side of the outside of the connecting shaft (10) is rotatably connected to a ratchet (11), the ratchet (11) and the ratchet (8) are engaged, and the other side of the outside of the connecting shaft (10) is sleeved with a torsion spring (12).

2. The laser interferometer for machine tool calibration according to claim 1, characterized in that: The outer side of the transparent film (7) is arranged inside the side of the laser channel (2) away from the interferometer body (1).

3. The laser interferometer for machine tool calibration according to claim 1, characterized in that: A friction block (14) is fixedly connected to the inner bottom wall of the housing (3), and the outer side of the transparent film (7) is inserted into the interior of the friction block (14).

4. The laser interferometer for machine tool calibration according to claim 1, wherein: One end of the torsion spring (12) is fixedly connected to the inner wall of the connecting shaft (10), and the other end of the torsion spring (12) is fixedly connected to the outer wall of the pawl (11).

5. The laser interferometer for machine tool calibration according to claim 1, characterized in that: The interface dustproof component includes a bottom cover (16) and a hinge (17), the front side of the bottom cover (16) is fixedly connected to the rear side of the interferometer body (1), one side of the bottom of the hinge (17) is fixedly connected to the top of the interferometer body (1), the other side of the bottom of the hinge (17) is fixedly connected to a top cover (19), a torsion spring 2 (18) is provided inside the hinge (17), fine soft hair (21) is fixedly connected between the bottom of the top cover (19) and the top of the bottom cover (16), and a locking component for locking the top cover (19) is provided between the top of the top cover (19) and the top of the interferometer body (1).

6. The laser interferometer for machine tool calibration according to claim 5, characterized in that: The locking assembly comprises a hook (15) and a hanging ring (20), wherein the bottom of the hook (15) is fixedly connected to the top of the interferometer body (1), and the bottom of the hanging ring (20) is fixedly connected to the top of the top cover (19), and the hook (15) and the hanging ring (20) are engaged with each other.

7. The laser interferometer for machine tool calibration according to claim 1, characterized in that: Guide shafts (13) are provided on both sides of the middle of the transparent film (7), and both ends of the guide shaft (13) are rotatably connected to the inside of the shell (3).

8. The laser interferometer for machine tool calibration according to claim 5, characterized in that: The rear side of the top cover shell (19) is fixedly connected with a supporting plate (4).

Images