CN216262471U - Clamping jig and laser equipment with external cooling module - Google Patents

Abstract

The utility model relates to the technical field of laser processing, and discloses a clamping jig and laser equipment with an external cooling module, wherein the clamping jig comprises a jig bottom plate, a pressing block and a stop post which are arranged on the jig bottom plate, a fixed seat and a jig handle which is arranged on the fixed seat, and the jig handle is connected with the pressing block through a pull rod; the pressing block is in sliding fit with the jig bottom plate and is matched with the stop pillar to clamp and position the product; the laser equipment comprises a jig assembly, wherein a product is fixed by adopting a clamping jig; the laser vision component comprises a laser and a vision module positioned on one side of the laser, and is used for carrying out laser processing on the positioned product and carrying out vision imaging on the product; the laser device also comprises a water-cooling circulation module positioned on the laser device and used for circularly cooling the laser device. The utility model can realize reliable positioning and clamping of products, improve the processing efficiency and the processing precision of equipment and ensure the reliability and the stability of the laser processing process.

Description

Clamping jig and laser equipment with external cooling module

Technical Field

The utility model relates to the technical field of laser processing, in particular to a clamping jig and laser equipment with an external cooling module.

Background

In the field of 3C electronic products, the surface of a glass product is often subjected to silk-screen printing ink, particularly for watch front cover plate glass, a customer has extremely high requirements on the product quality, and the requirement on precision cannot be met after the silk-screen printing ink is printed, namely, the silk-screen printing precision cannot be very high due to the process. In order to further improve the accuracy of the ink after screen printing, the edge of the ink after screen printing is usually removed in a form of visual laser, so as to meet the requirement of high accuracy. The existing jig generally adopts a vacuum adsorption mode to adsorb a product, so that the product is positioned, and the cost for positioning the product by adopting vacuum adsorption is higher. In addition, at the in-process of laser equipment work, generally can set up wind cooling module in laser instrument inside, however to some air-cooled laser instruments, often cause because the high temperature marks the effect unstability at the during operation, arouse the product to mark bad condition and take place occasionally, the setting can't guarantee that the forced air cooling is abundant at the inside wind cooling module of laser instrument, also can't guarantee the stability of laser instrument work.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a clamping jig and laser equipment with an external cooling module aiming at the technical problems in the prior art, which can realize reliable positioning and clamping of products, improve the processing efficiency and the processing precision of the equipment, ensure the reliability and the stability of the laser processing process, have simple integral structure and reliable functions and are easy to realize.

In order to solve the problems proposed above, the technical scheme adopted by the utility model is as follows:

the utility model provides a clamping jig which comprises a jig base plate, a pressing block and a stop post which are oppositely arranged on the jig base plate, a fixed seat arranged on the jig base plate and a jig handle arranged on the fixed seat, wherein the fixed seat and the stop post are respectively positioned at two opposite sides of the pressing block, and the jig handle is connected with the pressing block through a pull rod; the pressing block is in sliding fit with the jig bottom plate and is matched with the stop post to clamp and position the product.

Furthermore, press from both sides tight tool still including the connection briquetting and the elastic component of fixing base, set up the pull rod with removal axle between the briquetting, and set up and be in rotation axis and jump ring between tool handle and the tool bottom plate, the jump ring suit is in on the rotation axis.

Furthermore, the stop post adopts the dog of back taper, the dog is located the terminal surface diameter on the tool bottom plate is less than relative another terminal surface.

Furthermore, the side face of the pressing block matched with the product is provided with an inclined plane, and the inclined plane inclines from the top face of the pressing block to the center of the pressing block.

The utility model also provides laser equipment with an external cooling module, which comprises a cabinet, a jig assembly arranged on the cabinet and a laser vision assembly positioned on one side of the jig assembly;

the jig assembly is used for fixing a product and driving the product to rotate and comprises at least one clamping jig;

the laser visual assembly comprises a laser and a visual module positioned on one side of the laser, the laser is used for carrying out laser processing on the positioned product, and the visual module is used for carrying out visual imaging on the processed product;

the laser equipment further comprises a water-cooling circulation module positioned on the laser and used for circularly cooling the laser.

Furthermore, the jig assembly further comprises a turntable arranged on the cabinet, and the clamping jig is positioned on the turntable; one side of the turntable is provided with a light curtain for safety protection.

Further, the laser vision assembly further comprises a vibration mirror and a transflective mirror which are positioned on a laser beam generated by the laser, and a light folding cavity, a first lens and a beam expander are coaxially arranged between the laser and the vibration mirror along the transmission direction of the laser beam.

Further, the vision module comprises a coaxial light source, a second lens and a camera which are sequentially and coaxially arranged with the transparent mirror, and strip-shaped light sources which are respectively positioned at two opposite sides of the transparent mirror and are coaxial with the coaxial light source, wherein the light source generated by the coaxial light source and the laser beam act on the product coaxially.

Further, the water-cooling circulation module comprises a pressing plate positioned on the laser, a cooling pipe arranged on the pressing plate, and joints arranged at two ends of the cooling pipe, wherein the joints are connected with a water chiller arranged on one side of the cabinet; the cooling pipe adopts one U-shaped pipe or more than one U-shaped pipe, and the adjacent U-shaped pipes are communicated end to end.

Furthermore, a connecting plate is arranged between the beam expanding lens and the vibrating lens, and a hole corresponding to the laser beam is formed in the side face of the connecting plate and used for shaping the light spot of the laser beam.

Compared with the prior art, the utility model has the beneficial effects that:

according to the clamping jig and the laser equipment with the external cooling module, provided by the utility model, a product can be reliably clamped and positioned by the clamping jig; laser equipment passes through the tool subassembly and adopts the fixed product of clamp jig and drive the product and rotate, the product after the laser instrument through laser vision subassembly is to the location carries out the ink removal processing, and whether the product after combining vision imaging determination processing meets the requirements, set up the outside at the laser instrument through water-cooling circulation module, be used for cooling down for the laser instrument, thereby guarantee the stable effect output of laser instrument, overall structure is simple, the function is reliable also easily to be realized, and can improve laser machining's precision and efficiency, also can reduce the cost of equipment.

Drawings

In order to illustrate the solution of the utility model more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are some embodiments of the utility model, and that other drawings may be derived from these drawings by a person skilled in the art without inventive effort. Wherein:

fig. 1 is a schematic structural view of a clamping jig according to the present invention.

Fig. 2 is a top view of a laser apparatus with an external cooling module according to the present invention.

Fig. 3 is a schematic diagram of the overall structure of the laser device with the external cooling module according to the present invention.

Fig. 4 is a schematic structural diagram of a laser vision assembly according to the present invention.

Fig. 5 is a schematic structural diagram of the vision module of the present invention.

Fig. 6 is a schematic structural view of a water-cooling circulation module according to the present invention.

The reference numerals are explained below: 1-cabinet, 2-laser visual component, 3-jig component, 4-water cooling circulation module, 11-first cabinet, 12-second cabinet, 13-cold water machine, 14-start button, 15-light curtain, 17-keyboard mouse component, 18-display, 19-operation button, 110-tricolor lamp, 21-laser, 23-camera, 24-second lens, 25-coaxial light source, 26-vibrating mirror, 27-first lens, 28-transflective mirror, 29-bar light source, 210-refraction cavity, 211-beam expanding mirror, 212-hole, 31-jig bottom plate, 32-jig handle, 33-fixing seat, 34-jig spring, 35-snap spring, 36-rotating shaft, 37-pull rod, 38-moving shaft, 39-briquetting, 310-product, 311-bumping post, 312-turntable, 313-clapboard, 41-pressing plate, 42-cooling pipe, 43-first joint and 44-second joint.

Detailed Description

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used in the description presented herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model, e.g., the terms "length," "width," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., refer to an orientation or position based on that shown in the drawings, are for convenience of description only and are not to be construed as limiting of the present disclosure.

The terms "including" and "having," and any variations thereof, in the description and claims of this invention and the description of the above figures are intended to cover non-exclusive inclusions; the terms "first," "second," and the like in the description and in the claims, or in the drawings, are used for distinguishing between different objects and not necessarily for describing a particular sequential order. In the description and claims of the present invention and in the description of the above figures, when an element is referred to as being "fixed" or "mounted" or "disposed" or "connected" to another element, it may be directly or indirectly located on the other element. For example, when an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.

Furthermore, reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the utility model. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The embodiment of the utility model provides a clamping jig and laser equipment with an external cooling module, wherein the clamping jig can clamp and position a product; the laser equipment can carry out laser de-inking processing on the product after being clamped and positioned, and can cool in the processing process, so that the reliability of the processing process is ensured.

Referring to fig. 1, the clamping jig provided by the present invention includes a jig base plate 31, wherein a product 310 is placed on the jig base plate 31, and a pressing block 39 and a retaining column 311 for clamping and positioning the product 310 are provided; the pressing block 39 is arranged opposite to the blocking column 311 and is in sliding fit with the jig bottom plate 31.

Specifically, the jig bottom plate 31 is provided with jig acupuncture points for placing the product 310, and the outer edges of the jig bottom plate 31 and the jig acupuncture points 312 are respectively and oppositely provided with a pressing block 39 and a blocking column 311. The pressing block 39 can slide on the jig bottom plate 31 and is matched with the retaining column 311 to press and position the product 310.

Further, a fixing seat 33 is arranged on the jig bottom plate 31, the fixing seat 33 and the stop column 311 are respectively located on two opposite sides of the pressing block 39, a jig handle 32 is arranged on the fixing seat 33, and the jig handle 32 is connected with the pressing block 39 through a pull rod 37. The pressing block 39 is driven to translate on the jig bottom plate 31 by operating the jig handle 32 and acting on the pressing block 39 through the pull rod 37.

Further, an elastic piece is arranged between the pressing block 39 and the fixing seat 33, and specifically, the elastic piece adopts a jig spring 34. After the pressing block 39 is translated under the action of the pull rod 37, the elastic piece is compressed, the jig handle 32 is loosened, and the pressing block 39 is reset under the action of the elastic piece, so that the product 310 is pressed.

Further, be provided with between pull rod 37 and the briquetting 39 and remove axle 38, tool handle 32 with be provided with rotation axis 36 and jump ring 35 between the tool bottom plate 31, jump ring 35 suit is in on rotation axis 36, easy to assemble and connection also make when operation tool handle 32, can drive briquetting 39 through pull rod 37 reliably and carry out the translation.

Further, the stop column 311 is an inverted conical stop block, and the diameter of the end surface of the stop block located on the jig base plate 31 is smaller than that of the opposite end surface, that is, the end with the smaller diameter is located on the jig base plate 31; the side face of the pressing block 39, which is matched with the product 310, is provided with an inclined surface, and the inclined surface is inclined from the top face of the pressing block 39 to the center of the pressing block 39, so that the extrusion force applied to the whole product 310 is inclined downwards, and the product 310 is firmly clamped.

In the embodiment of the utility model, the pressing block 39 is matched with two adjacent side surfaces of the product 310, a V-shaped groove is formed on the pressing block 39, the inner wall of the V-shaped groove matched with the product 310 is an inclined surface, and the two inclined surfaces are in chamfer transition. The stop columns 311 are arranged in two groups and respectively correspond to the inclined surfaces of the pressing blocks 39, and two stop columns 311 are arranged in each group, so that the stop columns 311 and the pressing blocks 39 can reliably clamp the products 310. The number of the stoppers 311 can be increased or decreased according to actual needs.

According to the clamping jig provided by the utility model, the pressing block 39 and the stop column 311 are used for clamping and positioning the product, and the pressing block 39 acts on the product 310 through the downward extrusion force generated by the inclined plane, so that the pressing block 39 is driven by the jig handle 32 to translate and compress the elastic piece, the product 310 is conveniently placed on the acupuncture point of the jig, the elastic piece resets when the jig handle 32 is loosened, the pressing block 39 is enabled to tightly press the product 310, the whole structure of the clamping jig is simple, and reliable positioning and clamping can be realized.

Referring to fig. 2 and 3, the utility model further provides a laser device with an external cooling module, where the laser device includes a cabinet 1, a fixture assembly 3 disposed on the cabinet 1, and a laser vision assembly 2 located on one side of the fixture assembly 3.

The jig assembly 3 is used for fixing the product 310 and driving the product 310 to rotate, and includes at least one clamping jig.

The laser visual assembly 2 comprises a laser 21 and a visual module located on one side of the laser 21, the laser 21 is used for carrying out laser processing on the positioned product 310, and the visual module is used for carrying out visual imaging on the processed product 310.

The laser equipment further comprises a water-cooling circulation module 4 positioned on the laser 21 and used for circularly cooling the laser 21 to ensure the working reliability of the laser 21, so that the working reliability of the laser vision component 2 is ensured.

In the embodiment of the present invention, the jig assembly 3 places the product 310 through the clamping jig, clamps and positions the product 310, and can also drive the product 310 to rotate. Carry out laser de-inking processing to the product 310 after the location through laser instrument 21 of laser vision subassembly 2 to whether the product after combining the vision module to carry out vision formation of image to product 310 and confirm that the product after processing satisfies the demands, improved laser equipment's machining precision, cool down for laser instrument 21 in the laser vision subassembly 2 through water-cooling circulation module 4, thereby guarantee laser instrument 21's in the laser vision subassembly 2 stable effect output, also guarantee laser processing's precision and efficiency.

Continuing to refer to fig. 3, the jig assembly 3 further includes a turntable 312 disposed on the cabinet 1, the clamping jig is located on the turntable 312, and the jig base plate 31 is connected to the turntable 312. The turntable 312 drives the clamping jig and the product 310 to rotate, so that the product 310 can be conveniently loaded, processed and unloaded.

Further, a light curtain 15 for safety protection is arranged on the cabinet 1 and on one side of the turntable 312 in the jig component 3, so that a human hand can be prevented from being hit by the turntable 312 and the trigger equipment is prevented from stopping working.

In this embodiment, in order to improve the working efficiency of the apparatus, the turntable 312 is provided with a partition 313 (shown in fig. 2), so that two stations, namely a loading station and a processing station, can be set, the laser vision assembly 2 processes the product 310 at the processing station, and the loading station can simultaneously perform loading, so that the working efficiency of the apparatus can be improved. In other embodiments, the number of the stations on the turntable 312 may be multiple as required, such as loading, detecting, and unloading, which do not affect the achievement of the object of the present invention.

Referring to fig. 4 and 5, the laser vision module 2 further includes a galvanometer 26 and a mirror 28 positioned on the laser beam generated by the laser 21, the laser beam passing through the galvanometer 26 and reflected by the mirror 28 to act on the product 310. Specifically, the galvanometer 26 adopts an XY motor to drive the lens to move, and the laser beam can form a laser movement track on a plane after passing through the galvanometer 26 and act on the product 310.

Specifically, laser instrument 21 adopts the air-cooled laser instrument, because the inside air-cooled module of air-cooled laser instrument can't guarantee that the forced air cooling is abundant, consequently sets up water-cooling circulation module 4 in laser instrument 21's outside as supplementary heat dissipation, can guarantee that laser instrument 21 cools off abundant, promotes laser instrument self power output's stability to can realize reliably processing product 310. The transreflective mirror 28 is a 45-degree transreflective mirror and is used for reflecting laser beams to enable the laser beams to act on the product 310, the vibration mirror 26 and the laser 21 are coaxially arranged, and the transreflective mirror 28 is located on one side of the laser 21 and is coaxially arranged with the vibration mirror 26.

Further, a light folding cavity 210 and a beam expanding lens 211 are sequentially and coaxially arranged between the laser 21 and the galvanometer 26 along the laser beam transmission direction, and the light folding cavity 210 is used for adjusting the laser beam and ensuring the collimation of the laser beam. The beam expander 211 is used to change the diameter and divergence angle of the laser beam to ensure the reliability of the laser processing. A first lens 27 is disposed between the galvanometer 26 and the transflective mirror 28 for adjusting the light spot of the laser beam.

Further, referring to fig. 5, the vision module includes a coaxial light source 25, a second lens 24 and a camera 23 coaxially located above the transflective mirror 28, the coaxial light source 25 generates a light source coaxial with the laser beam reflected by the transflective mirror 28, and the light source and the laser beam act on the product 310 coaxially. The second lens 24 and the camera 23 both photograph and image the processing position on the product 310.

Further, the vision module is further provided with a bar light source 29 acting on the product 310, and the bar light source 29 and the coaxial light source 25 are respectively located on two sides of the transparent mirror 28 and used for enhancing the shooting and framing effects of the camera 23. Specifically, the two strip-shaped light sources 29 are symmetrically arranged below the transflective mirror 28, so that the image of the camera 23 is clearer, and the obtained image profile is more obvious.

Further, a connecting plate is arranged between the beam expander 211 and the vibrating mirror 26, and a hole 212 corresponding to the laser beam is arranged on the side surface of the connecting plate and used for shaping the light spot of the laser beam and removing stray light. Specifically, the holes 212 may be circular holes, square holes, or the like.

Referring to fig. 6, the water-cooling circulation module 4 includes a pressing plate 41 disposed on an outer surface of the laser 21, a cooling pipe 42 is disposed on the pressing plate 41, and two ends of the cooling pipe 42 are respectively provided with a joint connected to a water pipe. Specifically, the first joint 43 and the second joint 44 are different in size, so that the water flow speed at the two ends of the cooling pipe 42 is different, and the cooling pipe 42 is convenient for cooling the laser 21.

Furthermore, a groove is formed in the pressing plate 41, a bent cooling pipe 42 is arranged in the groove, so that the cooling pipe 42 can sufficiently dissipate heat, one or more U-shaped pipes are adopted as the cooling pipe 42, and if a plurality of U-shaped pipes are adopted, the adjacent U-shaped pipes are connected end to form an internally communicated cooling pipe, so that the purpose of sufficient heat dissipation is achieved.

Continuing to refer to fig. 3, the cabinet 1 includes a first cabinet 11 and a second cabinet 12 disposed on the first cabinet 11, the jig component 3 and the laser vision component 2 are disposed on the first cabinet 11, and a start button 14 for controlling the start of the apparatus is disposed on the first cabinet 11. The first cabinet 11 is provided with a display 18, a keyboard and mouse assembly 17 and an operation button 19, so that the display and the operation are convenient. The second cabinet 11 is further provided with a three-color lamp 110 for alarm display.

Further, a water cooler 13 is further arranged on one side of the cabinet 1, and the water cooler 13 is connected with a joint in the water-cooling circulation module 4. Specifically, the water chiller 13 is located at one side of the first cabinet 11 and is connected to a first joint 43 and a second joint 44 through water pipes.

The laser equipment with the external cooling module provided by the utility model has the working process as follows:

before feeding, an operator manually opens the jig handle 32, the jig spring 34 is compressed, the pressing block 39 is horizontally moved away from the outer edge of the acupuncture point of the jig, the product 310 is placed on the jig acupuncture point of the jig bottom plate 31 at the moment, the jig handle 32 is loosened, the pressing block 39 is reset through the jig spring 34 and is matched with the stop column 311 to tightly press the product 310. The turntable 312 rotates to drive the jig base plate 31 and the products 310 thereon to rotate to the required stations.

Laser 21 of laser vision assembly 2 generates a laser beam and performs a laser de-inking process on product 310 by action of galvanometer 26 and transflector 28. Meanwhile, the coaxial light source 15 also generates a light source coaxial with the laser beam and acts on the product 310, and the camera 23 and the first lens 24 take a picture of the processing position of the product 310. In this embodiment, the laser beam acts on the product 310 to remove the ink coating on the product 310, and the fonts on the product 310 are displayed. The font image is obtained by photographing, and the font outline is compared in size to determine whether the product 310 meets the requirements. If the size comparison of the font outline is within the error range, it indicates that the product 310 meets the requirements; otherwise, the requirement is not met, and blanking is prompted.

The cooling pipe 42 of the water-cooling circulation module 4 circulates and cools the laser 21 when the laser 21 is subjected to laser processing, and the cooling pipe 42 is formed in a back-and-forth U shape so as to sufficiently dissipate heat in order to sufficiently perform a heat dissipation function of the cooling pipe 42.

The embodiment of the utility model provides laser equipment with an external cooling module, belongs to the application of laser de-inking processing in the 3C industry, particularly relates to de-inking processing of watch surface cover glass, and can also be used for performing laser processing such as deburring on the edge of a product, removing a coating on the product and the like in other embodiments.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims (10)

1. The utility model provides a clamping jig which characterized in that: the clamping jig comprises a jig bottom plate, a pressing block and a stop post which are oppositely arranged on the jig bottom plate, a fixed seat arranged on the jig bottom plate and a jig handle arranged on the fixed seat, wherein the fixed seat and the stop post are respectively positioned at two opposite sides of the pressing block, and the jig handle is connected with the pressing block through a pull rod; the pressing block is in sliding fit with the jig bottom plate and is matched with the stop post to clamp and position the product.

2. The clamping jig according to claim 1, characterized in that: the clamping jig further comprises an elastic piece, a moving shaft, a rotating shaft and a clamping spring, wherein the elastic piece is connected with the pressing block and the fixing seat, the moving shaft is arranged between the pull rod and the pressing block, the rotating shaft and the clamping spring are arranged between the jig handle and the jig bottom plate, and the clamping spring is sleeved on the rotating shaft.

3. The clamping jig according to claim 1, characterized in that: the stop post adopts the dog of back taper, the dog is located the terminal surface diameter on the tool bottom plate is less than relative another terminal surface.

4. The clamping jig according to claim 1, characterized in that: the side face of the pressing block matched with the product is arranged to be an inclined face, and the inclined face inclines from the top face of the pressing block to the center of the pressing block.

5. A laser apparatus with an external cooling module, comprising: the laser equipment comprises a cabinet, a jig assembly arranged on the cabinet and a laser vision assembly positioned on one side of the jig assembly;

the jig assembly is used for fixing a product and driving the product to rotate and comprises at least one clamping jig according to any one of claims 1 to 4;

the laser visual assembly comprises a laser and a visual module positioned on one side of the laser, the laser is used for carrying out laser processing on the positioned product, and the visual module is used for carrying out visual imaging on the processed product;

the laser equipment further comprises a water-cooling circulation module positioned on the laser and used for circularly cooling the laser.

6. The laser device with the out-of-band cooling module of claim 5, wherein: the jig assembly further comprises a turntable arranged on the cabinet, and the clamping jig is positioned on the turntable; one side of the turntable is provided with a light curtain for safety protection.

7. The laser device with the out-of-band cooling module of claim 5, wherein: the laser vision assembly further comprises a vibrating mirror and a transflective mirror which are positioned on a laser beam generated by the laser, and a refraction cavity, a first lens and a beam expander are coaxially arranged between the laser and the vibrating mirror along the transmission direction of the laser beam.

8. The laser device with the out-of-band cooling module of claim 5, wherein: the vision module comprises a coaxial light source, a second lens and a camera which are sequentially and coaxially arranged with the transflective lens, and strip-shaped light sources which are respectively positioned at two opposite sides of the transflective lens and are coaxial with the coaxial light source, wherein the light source generated by the coaxial light source and the laser beam generated by the laser coaxially act on a product.

9. The laser device with the out-of-band cooling module of claim 5, wherein: the water-cooling circulation module comprises a pressing plate positioned on the laser, a cooling pipe arranged on the pressing plate and connectors arranged at two ends of the cooling pipe, and the connectors are connected with a water chiller arranged on one side of the cabinet; the cooling pipe adopts one U-shaped pipe or more than one U-shaped pipe, and the adjacent U-shaped pipes are communicated end to end.

10. The laser device with the out-of-band cooling module of claim 7, wherein: and a connecting plate is arranged between the beam expander and the vibrating mirror, and the side surface of the connecting plate is provided with a hole corresponding to the laser beam and used for shaping the light spot of the laser beam.

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