CN213764466U - Laser position adjusting mechanism - Google Patents

Abstract

The utility model discloses a laser position adjusting mechanism, which comprises a bracket, a third base arranged on the bracket in a sliding way and a transverse driving component used for driving the third base to slide transversely; a longitudinal plate is fixed on the third base, a first sliding block is arranged on the longitudinal plate in a sliding manner, and a longitudinal driving assembly for driving the first sliding block to longitudinally slide on the longitudinal plate is further fixed on the third base; meanwhile, a laser is arranged on the first sliding block; the mechanism can freely adjust the position of the laser in the horizontal direction and the vertical direction according to actual requirements so as to meet the position requirement on the laser, and the operation is simple and fast. In addition, the driving bevel gear shaft is locked and the rotation of the driving bevel gear shaft is blocked through the first locking mechanism arranged outside the gear box, so that the longitudinal position of the laser can be positioned, and the laser is positioned more firmly.

Description

Laser position adjusting mechanism

Technical Field

The utility model relates to a laser welding technical field, more specifically say, it relates to laser instrument position control mechanism.

Background

Laser welding is an efficient precision welding method using a laser beam with high energy density as a heat source. Laser welding is one of the important aspects of the application of laser material processing techniques. The 20 th century and the 70 th century are mainly used for welding thin-wall materials and low-speed welding, and the welding process belongs to a heat conduction type, namely, the surface of a workpiece is heated by laser radiation, the surface heat is diffused inwards through heat conduction, and the workpiece is melted to form a specific molten pool by controlling parameters such as the width, the energy, the peak power, the repetition frequency and the like of laser pulses. Due to the unique advantages, the welding method is successfully applied to the precise welding of micro and small parts. In laser welding, the low laser penetration rate causes a series of process problems, such as sink marks, burns, poor welding, and the like, and the welding quality in the welding process must be controlled. In addition, during the laser welding, the position of the laser needs to be adjusted, including the position in the vertical direction and the horizontal direction, and therefore, a supporting mechanism which is convenient for adjusting the position of the laser needs to be designed.

SUMMERY OF THE UTILITY MODEL

The utility model provides a laser instrument position control mechanism, this mechanism can carry out the position of free adjustment laser instrument at level and vertical direction according to the actual demand to satisfy the position requirement to the laser instrument when welding, and easy operation is swift.

In order to achieve the above purpose, the utility model provides a following technical scheme: a laser position adjusting mechanism comprises a support, a third base arranged on the support in a sliding mode and a transverse driving assembly used for driving the third base to slide transversely; a longitudinal plate is fixed on the third base, a first sliding block is arranged on the longitudinal plate in a sliding manner, and a longitudinal driving assembly for driving the first sliding block to longitudinally slide on the longitudinal plate is further fixed on the third base; meanwhile, a laser is arranged on the first sliding block;

the transverse driving assembly comprises a fourth base fixed on the bracket and a second sliding block arranged on the fourth base in a sliding mode, and the second sliding block can horizontally slide on the fourth base; a second screw rod is further rotatably arranged on the fourth base, penetrates through the second sliding block and is in threaded connection with the second sliding block; a second rotating handle is fixed at one end of the second screw rod, the third base is fixed on a second sliding block, the second rotating handle rotates and drives the second sliding block to horizontally move, and the second sliding block moves and drives the third base to horizontally move;

the longitudinal driving assembly comprises a first screw rod which is rotatably arranged on the longitudinal plate, the first screw rod penetrates through the first sliding block, and the first screw rod is in threaded connection with the first sliding block; one end of the first screw rod is provided with a second driving mechanism for driving the first screw rod to rotate; the second driving mechanism comprises a gear box fixed on the third base, a driving bevel gear and a driven bevel gear which are meshed with each other are arranged in the gear box, the first screw rod penetrates through the gear box and is fixedly connected with the driven bevel gear, a driving bevel gear shaft is further rotatably arranged on the gear box, one end of the driving bevel gear shaft extends into the gear box and is fixedly connected with the driving bevel gear, and the other end of the driving bevel gear shaft extends out of the gear box and is fixedly provided with a first rotating handle; the first rotating handle rotates and drives the driving bevel gear shaft to rotate, the driving bevel gear shaft rotates and drives the first screw rod to rotate, and the first screw rod rotates and drives the first sliding block to longitudinally slide on the longitudinal plate;

a first locking mechanism for locking the driving bevel gear shaft is further fixed outside the gear box, the first locking mechanism comprises a locking block fixed on the gear box, two clamping arms extend from the locking block, and a through hole for the driving bevel gear shaft to pass through is formed between the two clamping arms; the driving bevel gear shaft penetrates through the through hole, a first fastener is further installed between the free ends of the two clamping arms, and the free ends of the two clamping arms can be close to or far away from each other by rotating the first fastener; the free ends of the two clamping arms are close to each other by rotating the first fastener, so that the driving bevel gear shaft can be locked and the rotation of the driving bevel gear shaft is blocked.

The mechanism can adjust the position of the third base in the horizontal direction through the transverse driving component, and further can adjust the position of a laser arranged on the third base in the horizontal direction; meanwhile, the mechanism can adjust the position of the first sliding block in the vertical direction through the longitudinal driving assembly, and further can adjust the position of a laser arranged on the first sliding block in the vertical direction; the mechanism can freely adjust the position of the laser in the horizontal direction and the vertical direction according to actual requirements so as to meet the position requirement on the laser, and the operation is simple and fast. In addition, the driving bevel gear shaft is locked and the rotation of the driving bevel gear shaft is blocked through the first locking mechanism arranged outside the gear box, so that the longitudinal position of the laser can be positioned, and the laser is positioned more firmly.

Preferably, longitudinal guide rails are fixed to two opposite sides of the longitudinal plate respectively, a sliding plate is fixed between the laser and the first sliding block, grooves matched with the longitudinal guide rails are formed in two sides of the sliding plate respectively, and the longitudinal guide rails are embedded into the grooves.

Preferably, the longitudinal guide rail is provided with a sliding groove along the length direction thereof, a convex strip extends on the inner side wall of the groove corresponding to the sliding groove, and the convex strip is embedded into the sliding groove.

Preferably, a stopper is further fixed to a top end of the first lead screw.

Preferably, the third base is further provided with a reinforcing plate, one side of the reinforcing plate is fixedly connected with the longitudinal plate, and the bottom of the reinforcing plate is fixed on the third base.

Preferably, the transverse driving assembly further comprises a plurality of second guide rods fixed on the fourth base, and the plurality of second guide rods penetrate through the second sliding block.

Preferably, the transverse driving assembly further comprises a second locking mechanism for locking the second slider, the second locking mechanism comprises a second fastening member screwed on the second slider, and the second fastening member can be close to or far away from the second guide rod by rotating; the second fastener can be made to be close to the second guide rod and abut against the second guide rod by rotating the second fastener, and then the second sliding block can be locked and prevented from sliding.

To sum up, the utility model discloses following beneficial effect has:

1. the mechanism can adjust the position of the third base in the horizontal direction through the transverse driving component, and further can adjust the position of a laser arranged on the third base in the horizontal direction; meanwhile, the mechanism can adjust the position of the first sliding block in the vertical direction through the longitudinal driving assembly, and further can adjust the position of a laser arranged on the first sliding block in the vertical direction; the mechanism can freely adjust the positions of the laser in the horizontal and vertical directions according to actual requirements so as to meet the position requirements of the laser, and is simple and quick to operate;

2. the mechanism locks the driving bevel gear shaft and blocks the rotation of the driving bevel gear shaft through a first locking mechanism arranged outside the gear box, so that the longitudinal position of the laser can be positioned, and the laser is positioned more firmly;

3. longitudinal guide rails are respectively fixed on two opposite sides of a longitudinal plate of the mechanism, a sliding plate is fixed between a laser and a sliding block, grooves matched with the longitudinal guide rails are respectively formed in two sides of the sliding plate, and the longitudinal guide rails are embedded into the grooves; the laser can slide more smoothly and stably in the vertical direction; meanwhile, the longitudinal guide rail is provided with a sliding groove along the length direction, the inner side wall of the groove is extended with a convex strip corresponding to the sliding groove, the convex strip is embedded into the sliding groove, the sliding groove in the longitudinal guide rail is matched with the convex strip in the groove, and therefore component force received in the horizontal direction of the sliding block can be well balanced, and the laser can move more stably in the vertical direction.

Drawings

FIG. 1 is a schematic view of a welding pressure and collapse displacement control mechanism in cooperation with a laser position adjustment mechanism;

FIG. 2 is a schematic diagram of the welding pressure and collapse displacement control mechanism;

FIG. 3 is a front view of the weld pressure and collapse displacement control mechanism;

FIG. 4 is a left side view of the welding pressure and collapse displacement control mechanism;

FIG. 5 is a schematic diagram of a laser position adjustment mechanism;

FIG. 6 is a left side view of the laser position adjustment mechanism;

FIG. 7 is a top view of the laser position adjustment mechanism;

FIG. 8 is an enlarged view of the laser position adjustment mechanism at A;

FIG. 9 is a schematic view of the drive bevel gear axle and gear box assembly;

FIG. 10 is a schematic view of the assembly of the transverse drive assembly and the longitudinal drive assembly;

FIG. 11 is a schematic view of the laser position adjustment mechanism with the gearbox removed;

fig. 12 is an enlarged view at B in fig. 11.

Reference numerals: 1. a first base; 2. a support pillar; 3. a platform plate; 4. a glass plate; 5. a workpiece; 6. a laser; 7. a receiving table; 8. a linear bearing; 9. a displacement sensor; 10. a head measuring bar; 11. a second base; 12. a cylinder; 13. a pressure sensor; 14. a first guide bar; 15. a spring; 16. a clamping block; 17. an adjusting plate; 18. a support; 19. a third base; 20. a lateral drive assembly; 21. a longitudinal plate; 22. A first slider; 23. a longitudinal drive assembly; 24. a fourth base; 25. a second slider; 26. a second lead screw; 27. a second rotating handle; 28. a first lead screw; 29. a gear case; 30. a drive bevel gear; 31. a driven bevel gear; 32. a driving bevel gear shaft; 33. a first rotating handle; 34. a locking block; 35. clamping arms; 36. A second guide bar; 37. a stringer; 38. a guide groove; 39. a longitudinal guide rail; 40. a slide plate; 42. a chute; 43. A convex strip; 44. a reinforcing plate; 45. a limiting sheet; 46. a pillar; 47. and a support plate.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

The embodiment discloses a welding pressure and collapse displacement control mechanism, which comprises a first base 1 and a plurality of support columns 2 fixed on the first base 1, wherein a platform plate 3 is fixed at the upper ends of the support columns 2, a through hole is formed in the middle of the platform plate 3, a glass plate 4 is installed on the through hole, a laser 6 used for welding a workpiece 5 is arranged above the glass plate 4, a laser rack is arranged on one side of the control mechanism, and the laser 6 is installed on the laser rack; a bearing table 7 is further arranged between the first base 1 and the platform plate 3, at least two support columns 2 penetrate through the bearing table 7, the support columns 2 penetrate through the bearing table 7 through linear bearings 8, the bearing table 7 can move up and down along the support columns 2, at least one displacement sensor 9 is further fixed on the bearing table 7, and a measuring head rod 10 matched with the displacement sensor 9 is mounted on the platform plate 3 corresponding to the displacement sensor 9; a second base 11 and a first driving mechanism for driving the second base 11 to move up and down are further arranged below the receiving table 7, wherein the first driving mechanism is a cylinder 12, an oil cylinder or an electric push rod; the first driving mechanism is arranged on the first base 1, and the upper end of the second base 11 is provided with a pressure sensor 13; the first driving mechanism drives the second base 11 to move upwards, the second base 11 moves upwards and drives the pressure sensor 13 to move upwards, and the pressure sensor 13 moves upwards and abuts against the bearing table 7, so that the bearing table 7 is driven to move upwards. The mechanism further includes a control circuit (PLC) electrically connected to the displacement sensor 9 and the pressure sensor 13.

The workpiece 5 is placed on the bearing table 7, the first driving mechanism drives the second base 11 to move upwards, the second base 11 moves upwards and drives the pressure sensor 13 to move upwards, and the pressure sensor 13 moves upwards and abuts against the bearing table 7 so as to drive the bearing table 7 to move upwards; the bearing table 7 moves upwards to enable the workpiece 5 to abut against the glass plate 4 above, at the moment, the pressure sensor 13 feeds back pressure values and transmits information to the control circuit, meanwhile, the displacement sensor 9 is in contact with the measuring head rod 10 above, feeds back displacement values and transmits information to the control circuit, and when the pressure values and the displacement values reach a preset range, the laser 6 is started and is welded according to a set path. The workpiece 5 comprises a body and a cover body; and (5) welding the workpiece 5, namely welding the cover body on the body. In the welding process, the workpiece 5 is clamped between the glass plate 4 and the bearing table 7, and the pressure value is fed back through the pressure sensor 13; if the pressure is insufficient, after welding is finished, a leak can be generated between the welding surfaces of the two parts (namely the body and the cover body), and the phenomenon of welding leakage can be generated; therefore, both components need to secure a certain pressure value. The mechanism monitors the welding depth through the displacement sensor 9, and simultaneously performs pressure control through the pressure sensor 13, so that the welding quality of laser welding can be improved. In addition, the mechanism has the advantages of simple structure, convenience in operation and high automation degree.

In the above-mentioned technical solution, preferably, at least one first guide rod 14 is further fixed to the lower end of the receiving table 7, and the first guide rod 14 penetrates through the second base 11. In this way, the first guide bar 14 guides the movement of the second base 11, so that the movement is more stable. Furthermore, an elastic piece is sleeved on the first guide rod 14, the elastic piece is a spring 15 or elastic rubber, the upper end of the elastic piece abuts against the bearing table 7, and the lower end of the elastic piece abuts against the second base 11; the elastic member can play a certain buffering role and has a certain protection role on the pressure sensor 13. Meanwhile, a gap is formed between the pressure sensor 13 and the receiving table 7. Due to the action of the elastic piece, a certain gap is kept between the pressure sensor 13 and the bearing table 7, so that the pressure sensor 13 can be well protected, the pressure sensor is prevented from being always in a stressed state, and the service life of the pressure sensor 13 can be prolonged. In addition, a clamp block 16 is fixed to a lower portion of the first guide bar 14. After welding, the first driving mechanism drives the second base 11 to move downwards, the second base 11 moves downwards to be in contact with the clamping block 16, the second base 11 continues to move downwards and drives the clamping block 16 and the first guide rod 14 to move downwards, and the first guide rod 14 moves downwards and drives the receiving platform 7 to move downwards.

Further, the first base 1 may be a one-piece flat plate structure; alternatively, the first base 1 is composed of two flat plates separated from each other. Two first driving mechanisms are arranged below the bearing table 7 and symmetrically arranged on the left side and the right side of the first base 1. In this way, the upward movement of the second base 11 can be made more smooth. When the first base 1 is formed of two flat plates, two first driving mechanisms may be respectively mounted on the two flat plates.

In addition, an adjusting plate 17 is further mounted on the bearing table 7, and the workpiece 5 is placed on the adjusting plate 17, so that the position of the workpiece 5 can be adjusted conveniently.

In the above technical solution, as an implementation manner, the receiving table 7 is a square flat plate structure, four supporting columns 2 are fixed on the first base 1, and all the four supporting columns 2 penetrate through the receiving table 7; meanwhile, the receiving table 7 is provided with three displacement sensors 9, and the three displacement sensors 9 are respectively arranged at three vertex angles of the receiving table 7. Certainly, the platform board 3 is provided with a head measuring bar corresponding to the three displacement sensors 9. In addition, the second base 11 is also a flat plate structure.

In order to facilitate the adjustment of the position of the laser, i.e. the position of the laser in the vertical direction and the horizontal direction, further, the laser is fixed on a laser position adjusting mechanism, and the structure of the laser position adjusting mechanism is specifically as follows:

the laser position adjusting mechanism, as shown in fig. 5 to 12, includes a bracket 18, a third base 19 slidably disposed on the bracket 18, and a lateral driving assembly 20 for driving the third base 19 to slide laterally; a vertical plate 21 is fixed on the third base 19, a first sliding block 22 is arranged on the vertical plate 21 in a sliding manner, and a longitudinal driving assembly 23 for driving the first sliding block 22 to longitudinally slide on the vertical plate 21 is also fixed on the third base 19; meanwhile, the laser 6 is mounted on the first slider 22; as shown in fig. 6 and 7, the transverse driving assembly 20 includes a fourth base 24 fixed on the support 18, and a second slider 25 slidably disposed on the fourth base 24, and the second slider 25 can horizontally slide on the fourth base 24; a second screw rod 26 is also rotatably arranged on the fourth base 24, the second screw rod 26 penetrates through the second slider 25, and the second screw rod 26 is in threaded connection with the second slider 25; a second rotating handle 27 is fixed at one end of the second screw rod 26, the third base 19 is fixed on the second sliding block 25, the second rotating handle 27 rotates and drives the second sliding block 25 to move horizontally, and the second sliding block 25 moves and drives the third base 19 to move horizontally;

as shown in fig. 7 to 9, the longitudinal driving assembly 23 includes a first lead screw 28 rotatably disposed on the longitudinal plate 21, the first lead screw 28 penetrates through the first slider 22, and the first lead screw 28 is in threaded connection with the first slider 22; one end of the first screw 28 is provided with a second driving mechanism for driving the first screw 28 to rotate; the second driving mechanism comprises a gear box 29 fixed on the third base 19, a driving bevel gear 30 and a driven bevel gear 31 which are meshed with each other are arranged in the gear box 29, the first screw 28 penetrates through the gear box 29 to be fixedly connected with the driven bevel gear 31, a driving bevel gear shaft 32 is further rotatably arranged on the gear box 29, one end of the driving bevel gear shaft 32 extends into the gear box 29 and is fixedly connected with the driving bevel gear 30, and the other end of the driving bevel gear shaft 32 extends out of the gear box 29 and is fixed with a first rotating handle 33; the first rotating handle 33 rotates and drives the driving bevel gear shaft 32 to rotate, the driving bevel gear shaft 32 rotates and drives the first lead screw 28 to rotate, and the first lead screw 28 rotates and drives the first sliding block 22 to longitudinally slide on the longitudinal plate 21; as shown in fig. 10 and 12, a first locking mechanism for locking the driving bevel gear shaft 32 is further fixed outside the gear box 29, the first locking mechanism includes a locking block 34 fixed on the gear box 29, the locking block 34 is sleeved on the driving bevel gear shaft 32, and the driving bevel gear shaft 32 can rotate on the locking block 34; two clamping arms 35 extend from the locking block 34, and a through hole for the driving bevel gear shaft 32 to pass through is formed between the two clamping arms 35; the driving bevel gear shaft 32 penetrates through the through hole, a first fastener is further installed between the free ends of the two clamping arms 35, and the free ends of the two clamping arms 35 can be close to or far away from each other by rotating the first fastener; rotating the first fastener brings the free ends of the two clamp arms 35 closer to each other, which in turn enables locking of the drive bevel gear shaft 32 and hinders rotation of the drive bevel gear shaft 32. The mechanism can adjust the position of the third base 19 in the horizontal direction through the transverse driving component 20, and further can adjust the position of a laser arranged on the third base 19 in the horizontal direction; meanwhile, the mechanism can adjust the position of the first slide block 22 in the vertical direction through the longitudinal driving assembly 23, and further can adjust the position of a laser arranged on the first slide block 22 in the vertical direction; therefore, the mechanism can freely adjust the position of the laser in the horizontal direction and the vertical direction according to actual requirements so as to meet the position requirement of welding on the laser, and the operation is simple and rapid. In addition, the drive bevel gear shaft 32 is locked and the rotation of the drive bevel gear shaft 32 is hindered by the first locking mechanism disposed outside the gear case 29, and thus the longitudinal position of the laser can be positioned, so that the positioning of the laser is firmer. Further, the lateral driving assembly 20 further includes a plurality of second guide rods 36 fixed to the fourth base 24, and the plurality of second guide rods 36 penetrate through the second slider 25. In this way, the movement of the second slider 25 can be made more smooth and smooth. Wherein, the transverse driving assembly 20 further comprises a second locking mechanism for locking the second lead screw 26, the second locking mechanism comprises a second fastener which is in threaded connection with the second slider 25 and can be rotated to be close to or far away from the second guide rod 36; the second fastener can be rotated to be close to the second guide rod 36 and abut against the second guide rod 36, so that the second slider 25 can be locked and the second slider 25 is prevented from sliding and rotating. The mechanism can realize the positioning of the laser in the horizontal direction through the second locking mechanism, and avoids the influence on the welding precision caused by the displacement in the welding process.

In the above technical solution, as shown in fig. 10 and 11, longitudinal beams 37 are further fixed to opposite sides of the longitudinal plate 21, a guide groove 38 for the first slider 22 to slide in the vertical direction is formed between the two longitudinal beams 37, and the first slider 22 is embedded in the guide groove 38. Preferably, longitudinal rails 39 are fixed to opposite sides of the longitudinal plate 21, and specifically, the longitudinal rails 39 are fixed to the longitudinal beams 37. A sliding plate 40 is fixed between the laser and the first sliding block 22, grooves matched with the longitudinal guide rails 39 are respectively formed in two sides of the sliding plate 40, and the longitudinal guide rails 39 are embedded into the grooves. Therefore, the laser can slide more smoothly and stably in the vertical direction. Furthermore, the longitudinal guide rail 39 is provided with a sliding groove 42 along the length direction thereof, a convex strip 43 extends from the inner side wall of the groove corresponding to the sliding groove 42, and the convex strip 43 is embedded into the sliding groove 42. The end of the laser remote from the first slider 22 has a tendency to move downwards due to the action of gravity; the laser acts on the first slider 22 to analyze the stress of the first slider 22, including a component force in the vertical direction and a component force in the horizontal direction, and the sliding groove 42 on the longitudinal guide rail 39 is matched with the raised line 43 on the groove, so that the component force in the horizontal direction can be well balanced, and the laser can move more stably in the vertical direction.

Wherein, the third base 19 is further provided with a reinforcing plate 44, one side of the reinforcing plate 44 is fixedly connected with the longitudinal plate 21, and the bottom of the reinforcing plate 44 is fixed on the third base 19. Meanwhile, a limiting sheet 45 is fixed at the top end of the first screw rod 28. In this way, the first slide 22 is prevented from moving upward too much and being disengaged from the first lead screw 28. The bracket 18 includes a plurality of support columns 46 and a support plate 47 fixed to the upper ends of the plurality of support columns 46, and the fourth base 24 is fixed to the support plate 47. The first fastener and the second fastener are bolts or screws.

In the present invention, it should be understood that the terms "upper" and "lower" indicate the orientation or the position relationship based on the orientation or the position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and therefore, the present invention is not limited thereto.

The directions given in the present embodiment are merely for convenience of describing positional relationships between the respective members and the relationship of fitting with each other. It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (7)

1. Laser instrument position control mechanism, characterized by: comprises a bracket (18), a third base (19) arranged on the bracket (18) in a sliding way and a transverse driving component (20) used for driving the third base (19) to slide transversely; a longitudinal plate (21) is fixed on the third base (19), a first sliding block (22) is arranged on the longitudinal plate (21) in a sliding manner, and a longitudinal driving assembly (23) for driving the first sliding block (22) to longitudinally slide on the longitudinal plate (21) is further fixed on the third base (19); meanwhile, a laser is arranged on the first sliding block (22);

the transverse driving assembly (20) comprises a fourth base (24) fixed on the bracket (18) and a second sliding block (25) arranged on the fourth base (24) in a sliding manner, and the second sliding block (25) can horizontally slide on the fourth base (24); a second screw rod (26) is further rotatably arranged on the fourth base (24), the second screw rod (26) penetrates through the second sliding block (25), and the second screw rod (26) is in threaded connection with the second sliding block (25); a second rotating handle (27) is fixed at one end of the second screw rod (26), the third base (19) is fixed on the second sliding block (25), the second rotating handle (27) rotates and drives the second sliding block (25) to horizontally move, and the second sliding block (25) moves and drives the third base (19) to horizontally move;

the longitudinal driving assembly (23) comprises a first screw rod (28) rotatably arranged on the longitudinal plate (21), the first screw rod (28) penetrates through the first sliding block (22), and the first screw rod (28) is in threaded connection with the first sliding block (22); one end of the first screw rod (28) is provided with a second driving mechanism for driving the first screw rod (28) to rotate; the second driving mechanism comprises a gear box (29) fixed on a third base (19), a driving bevel gear (30) and a driven bevel gear (31) which are meshed with each other are arranged in the gear box (29), a first screw rod (28) penetrates through the gear box (29) to be fixedly connected with the driven bevel gear (31), a driving bevel gear shaft (32) is further rotatably arranged on the gear box (29), one end of the driving bevel gear shaft (32) extends into the gear box (29) and is fixedly connected with the driving bevel gear (30), and the other end of the driving bevel gear shaft (32) extends out of the gear box (29) and is fixed with a first rotating handle (33); the first rotating handle (33) rotates and drives the driving bevel gear shaft (32) to rotate, the driving bevel gear shaft (32) rotates and drives the first screw rod (28) to rotate, and the first screw rod (28) rotates and drives the first sliding block (22) to longitudinally slide on the longitudinal plate (21);

a first locking mechanism for locking the driving bevel gear shaft (32) is further fixed outside the gear box (29), the first locking mechanism comprises a locking block (34) fixed on the gear box (29), two clamping arms (35) extend from the locking block (34), and a through hole for the driving bevel gear shaft (32) to pass through is formed between the two clamping arms (35); the driving bevel gear shaft (32) penetrates through the through hole, a first fastener is further installed between the free ends of the two clamping arms (35), and the free ends of the two clamping arms (35) can be close to or far away from each other by rotating the first fastener; the free ends of the two clamping arms (35) are close to each other by rotating the first fastener, so that the driving bevel gear shaft (32) can be locked and the rotation of the driving bevel gear shaft (32) is blocked.

2. The laser position adjustment mechanism of claim 1, wherein: longitudinal guide rails (39) are fixed on two opposite sides of the longitudinal plate (21) respectively, a sliding plate (40) is fixed between the laser and the first sliding block (22), grooves matched with the longitudinal guide rails (39) are formed in two sides of the sliding plate (40) respectively, and the longitudinal guide rails (39) are embedded into the grooves.

3. The laser position adjustment mechanism according to claim 2, wherein: the longitudinal guide rail (39) is provided with a sliding groove (42) along the length direction, the inner side wall of the groove is provided with a protruding strip (43) corresponding to the sliding groove (42), and the protruding strip (43) is embedded into the sliding groove (42).

4. The laser position adjustment mechanism of claim 1, wherein: a limiting sheet (45) is further fixed to the top end of the first screw rod (28).

5. The laser position adjustment mechanism of claim 1, wherein: and a reinforcing plate (44) is further arranged on the third base (19), one side of the reinforcing plate (44) is fixedly connected with the longitudinal plate (21), and the bottom of the reinforcing plate (44) is fixed on the third base (19).

6. The laser position adjustment mechanism of claim 1, wherein: the transverse driving assembly (20) further comprises a plurality of second guide rods (36) fixed on the fourth base (24), and the plurality of second guide rods (36) penetrate through the second sliding block (25).

7. The laser position adjustment mechanism of claim 1, wherein: the transverse driving assembly (20) further comprises a second locking mechanism for locking the second slider (25), the second locking mechanism comprises a second fastener which is in threaded connection with the second slider (25), and the second fastener can be close to or far away from the second guide rod (36) by rotating; the second fastener can be enabled to be close to the second guide rod (36) and abut against the second guide rod (36) by rotating the second fastener, and then the second sliding block (25) can be locked and prevented from sliding.

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