CN106756721B - A kind of method and device based on laser processing technology prepares coating - Google Patents

Abstract

The invention discloses a method and a device for preparing a coating based on laser processing technology, and belongs to the technical field of parts remanufacturing. In this method, a thin layer of black organic matter is firstly coated on the surface of the workpiece as a laser energy absorption layer, and the surface of the workpiece is irradiated with a pulsed laser with a power density of GW/cm ² to produce plastic pits on the surface of the workpiece, and then the processed The surface of the workpiece is cleaned and dried, and the spraying wire is irradiated with a laser pulse beam with a power density of 10 ⁴ ~ 10 ⁶ W/cm ² to melt it into a liquid state, and the liquid state hits the surface of the workpiece at high speed under the blown high-pressure protective gas to form a coating. The invention adopts an adjustable laser, which can control the diameter of the laser pulse beam and the output energy. The coating prepared by the method of the invention has the characteristics of strong interface bonding force and high quality. The invention has the advantages of short spraying time, less energy consumption and no pollution. technical features.

Description

A method and device for preparing a coating based on laser processing technology

Technical field:

The invention belongs to the technical field of parts remanufacturing, and in particular relates to a method and a device for preparing a thermal spray coating based on laser processing technology. The method first adopts the method of laser shock to form micro pits on the surface of the workpiece to be sprayed, and then uses the method of laser melting spraying wire to form a coating on the surface of the workpiece after shock treatment. Using this method improves the bonding strength of the coating and the substrate interface, improves the quality of the coating, and thus greatly prolongs the service life of the workpiece.

Background technique:

The coating is a thin layer of substance coated on the surface of the workpiece, which plays the role of heat insulation, corrosion resistance and wear resistance. Various failure modes of thermal spray coatings during use, such as coating delamination, peeling, cracking, etc., are all related to the bonding force between the coating and the substrate and the state of residual stress. The main factors affecting the bonding force between the coating and the surface of the workpiece are: the surface state of the workpiece, the bonding area, and the residual stress. The surface state of the workpiece includes surface cleanliness and surface roughness, and surface oil, rust and oxides will reduce the coating quality and bonding strength. In the process of thermal spraying, due to the difference in thermal physical properties between the coating and the substrate of the workpiece and the reasons such as high temperature rapid cooling and rapid heating, residual tensile stress will be formed in the obtained coating, and the existence of tensile stress is very important to the performance of the coating. Harmful, excessive tensile stress will not only cause the coating to crack, but also cause the coating to peel off from the substrate. In order to increase the bonding force between the coating and the substrate, effectively improve the performance and service life of the coating. Before spraying, roughen the surface of the workpiece to increase the roughness of the surface, thereby increasing the bonding area between the coating and the substrate, so that the sprayed particles form an overlapping chain state to enhance the bonding force. At present, the main methods of roughening the surface of workpieces to be sprayed include sandblasting and EDM roughening.

Sand blasting is to spray sand or abrasives onto the surface of the workpiece to be sprayed, and roughen the surface of the workpiece through the scouring, chiseling and hammering of abrasives. The operation of sand blasting produces a lot of dust and noise, which pollutes the environment more; the intensity of sand blasting is not easy to control, the size of sand particles is inconsistent, and the depth of pits obtained is inconsistent, which easily leads to the difficulty in meeting the requirements of surface roughness, and deep pits will also It leads to stress concentration, produces harmful residual tensile stress, and reduces the fatigue properties of the coating. Especially, the special-shaped sand particles with sharp angles can cause greater damage to the surface of the workpiece, which seriously damages the coating quality.

EDM roughening is to use nickel (or aluminum) sheets or wire bundles as electrodes after the surface of the workpiece is purified, and use the surface of the workpiece as another electrode to perform slight welding with manual arc welding to form a rough and thin welding layer on the surface of the workpiece. To achieve the purpose of coarsening. Although the equipment for EDM roughening treatment is simple and easy to operate, its manual operation efficiency is low, and tensile stress will be formed during the roughening process of welding discharge, which will reduce the fatigue resistance of the workpiece.

Thermal spraying is to heat the sprayed material to a molten state or a semi-molten state by means of a certain heat source, and then atomize it through a high-speed airflow, and spray and deposit it on the surface of the workpiece at a certain speed to form a covering layer with various functions. Surface Engineering Technology. At present, the main thermal spraying methods include flame wire spraying and arc spraying.

Flame wire spraying is an earlier spraying method. Its spraying principle is to send the wire into the burning flame at a suitable speed, and the heated wire end is melted, and the molten stream is sprayed and accelerated by compressed air, and then sprayed Form a coating on the surface of the workpiece. In this spraying method, due to the lack of heat carried by the molten particles, the coating and the surface of the workpiece are mainly mechanically bonded, and the bonding strength is low; The tissue is loose and porous, and the stress inside the coating is relatively large.

Arc spraying is to use two sprayed metal wires as consumable electrodes, transmit DC or AC, use the arc generated at the end of the wire as a heat source to melt the metal, use compressed air to atomize the molten droplets and spray them on the surface of the substrate to form coating. Arc spraying can only spray conductive materials, and fouling occurs at the fusing part of the wire, which makes the sprayed particle size different and the coating texture uneven; in addition, due to the high temperature of the arc heat source, the burning loss of elements is larger than that of flame spraying, which is easy resulting in a decrease in coating hardness.

Invention content:

The present invention aims at the above-mentioned technical problems existing in the prior art, and provides a method and device for preparing a coating based on laser processing technology. The specific steps of a method for preparing a coating based on laser processing technology provided by the present invention are as follows:

(1) Coat the surface of the dry and clean workpiece 11 to be sprayed with a black organic matter with a thickness of 0.05 mm as an absorbing layer. Then the workpiece 11 is fixed on the workbench 12, the water valve 18 of the water nozzle 17 is opened, and a 2mm thick flowing water layer is formed on the surface of the workpiece 11 to be sprayed, and the water velocity is 2 to 5m/s; the laser pulse beam 7 is focused After the lens 33 converges, through the up and down movement of the worktable 12 and the focusing lens 33, a spot with a diameter of 0.2-1.5 mm is formed on the surface of the workpiece 11, and the laser pulse beam 7 with a power density of GW/cm ² passes through the flowing water layer to irradiate On the absorbing layer on the surface of the workpiece 11 to be treated, the absorbing layer absorbs the laser energy and then vaporizes and ionizes to form a high-temperature and high-pressure plasma. The plasma expands in a very short time and is bound by the water layer to generate GPa-level plasma shock wave. The shock wave causes plastic deformation on the surface of the workpiece 11, resulting in residual compressive stress and plastically deformed micro pits; moving the worktable 12 in the horizontal plane produces plastically deformed micro pits and residual compressive stress at another position on the surface of the workpiece 11 to be processed , the moving speed of the table 12 is determined by the frequency of the laser pulse beam 7 and the distance between adjacent impact pits, so micro pits showing a certain density lattice distribution are generated on the surface of the workpiece 11 to be sprayed.

(2) Open the gas valve 9 of the gas storage tank 5, so that the protective gas with a pressure of 0.5-1.5 MPa enters the spray gun 8, and adjust the opening and closing degree of the water valve 18, so that the water flow speed is above 30m/s, and the gas and high pressure The water flow washes and rinses together to remove the remaining unablated absorbing layer on the surface of the workpiece 11, then close the water valve 18, wait for the gas to dry the surface of the workpiece 11 to be sprayed, move the base 39 of the focusing lens, and adjust the position of the focusing lens 33 , the laser pulse beam 7 is focused on the position where the left and right symmetrically arranged spraying wires 15 meet, the spraying wire 15 is driven by the wire feeding motor 20 to drive the reducer 19 through the wire feeding roller 14, and the pulse energy of the laser pulse beam 7 is adjusted so that Its power density is 10 ⁴ ~ 10 ⁶ W/cm ² . After the spraying wire 15 is irradiated by the laser pulse beam 7, it is rapidly melted into liquid droplets, and the high-pressure protective gas quickly atomizes the liquid droplets into particles to form high-speed moving particles. The flow 10 hits the surface of the workpiece 11 to form a coating 21 on the surface, realizing one-time spraying. Multiple times of spraying are performed through the horizontal movement of the worktable 12 , so as to complete the spraying of the entire surface of the workpiece 11 .

The invention provides a device for preparing a coating based on laser processing technology, the device includes a laser generator 1, a light guiding and focusing system, a control system, a gas storage system, a water spray system, a workpiece clamping system and a wire feeding system; The laser generator 1 can emit short-pulse laser and continuous laser; the light guiding and focusing system includes a total reflection mirror 6, a focusing lens 33, a base 39, an upper fixing plate 32, a double-ended stud 41, a shouldered Stud stud 29, first thin nut 30, second thin nut 37, second nut 38, third nut 40, first nut 35, third washer 31, fourth washer 34, split nut 36, Lead screw 13, motor 27, motor mounting bracket 24, bolt 25, second spacer 26 and motor base 28; Described focusing lens 33 is put into base 39, is threaded by upper fixed plate 32 and base 39, will focus The lens 33 is fixed on the base 39, and one end of the shoulder stud 29 is connected to the base 39 by threads, and is tightened by the second nut 38 and the third gasket 31. The other end of column 29 is provided with first thin nut 30 and second thin nut 37, and first thin nut 30 and second thin nut 37 rely on the frictional force between them to be close together and make their position fixed, spray gun 8 wall and There is a gap between the shoulder of the shoulder stud 29 and the second thin nut 37, so that the stud 29 with the shoulder can move freely up and down; one end of the stud 41 is connected with the base 39 by threads , tightened by the third nut 40 and the fourth washer 34, the other end of the stud 41 is threadedly connected to the split nut 36, and is tightened and fixed by the first nut 35, the lead screw 13 is threaded to the split nut 36 , the other end of leading screw 13 is connected with motor 27 and is driven by it, and motor base 28 fixes motor 27 on the right-angled motor mounting bracket 24 by bolt 25 and second gasket 26, and motor mounting bracket 24 passes screw 23 and The first gasket 22 is fixed on the wall of the spray gun 8, and the position of the focusing lens 33 is adjusted by the motor 27 and the lead screw 13 rotating to drive the split nut 36 to move up and down.

The gas storage system includes an air storage tank 5, an air valve 9 and an air guide pipe 4; one end of the air guide pipe 4 is connected to the air storage tank 5, and the other end of the air guide pipe 4 is connected to the spray gun 8 through the air valve 9. After the air valve 9 is opened, The shielding gas enters the spray gun 8 from the gas storage tank 5 through the air guide pipe 4 .

The water spray system is made up of a water spray head 17, a water valve 18 and the water pipes connecting them; the water spray system is arranged above the workbench 12.

The wire feeding system includes a left-right symmetrical wire feeding motor 20, a speed reducer 19, a spray wire 15, a wire feeding roller 14 and a wire reel 16; The wire feeding roller 14 rotates to move the spraying wire 15 wound in the wire reel 16 forward to realize wire feeding.

The workpiece clamping system includes a spray gun 8, a workpiece 11 and a workbench 12. The spray gun 8 is located directly above the workbench 12, and narrow grooves are opened on both sides, so that the shoulder studs 29 and stud studs 41 Through this, the workpiece 11 is fixed on the worktable 12 and moves together with the worktable 12 .

The control system includes a computer 2 and a controller 3; the information of the controller 3 is input by the computer 2 to control the frequency and energy of the laser pulse beam 7 sent by the laser generator 1, to control the direction and speed of the movement of the worktable 12, and to control the delivery The rotating speed and the number of revolutions of silk motor 20 and motor 27 control the switch and the size of the degree of opening and closing of water valve 18 and air valve 9.

The present invention has the following technical characteristics:

1. Use laser shock to pretreat the surface of the workpiece. Due to the precise and controllable laser parameters, the diameter of the spot can be accurate to the order of microns. During pretreatment, plastic pits can be produced according to requirements, and the size and depth of the pits and the pits The distribution density of the pits can be controlled without scratching the surface of the workpiece, thereby effectively controlling the surface roughness of the substrate and increasing the bonding area between the coating and the substrate.

2. The surface of the workpiece is pretreated by laser shock, plastic deformation occurs on the surface of the workpiece, and a residual compressive stress layer with a certain thickness distribution is formed, which can effectively offset the residual tensile stress generated in the process of forming a coating by thermal spraying, and can greatly Reduce the harm of residual tensile stress to coating quality.

3. As a means of pretreatment, laser shock can refine the grains on the surface of the workpiece. During thermal spraying, the refined crystal grains on the surface of the substrate grow up when heated, but the growth rate slows down, which reduces the tendency of the substrate grains to become coarse during thermal spraying and improves the quality of the coating.

4. Laser is used to heat the wire. Since the energy output by the laser is precisely controllable, the size of the spot is precisely adjustable. Therefore, the heating position of the wire is precisely adjustable, and the heating temperature is precisely and controllable. It can not only realize the heating of thick wire rods, but also realize the heating of fine wire rods, and achieve fine operation; it can realize the heating of both high melting point materials and low melting point materials, and has greater processing flexibility.

5. The present invention uses laser processing technology to integrate multiple processes such as pretreatment and spraying processes, replacing the cumbersome surface sandblasting and roughening process and then spraying. Not only is the device simple, the operation is simple and convenient, it is easy to realize automatic production, and it can Precise control, fast processing speed, greatly improve the processing efficiency of spraying.

Description of drawings:

Fig. 1 is a schematic diagram of the device structure of the present invention;

Fig. 2 is a schematic diagram of a partially enlarged structure of I in Fig. 1;

Fig. 3 is a schematic diagram of a partially enlarged structure of II in Fig. 1;

Fig. 4 is a schematic diagram of the cross-sectional structure along the line A-A in Fig. 3 .

In the figure: 1: laser generator; 2: computer; 3: controller; 4: air duct; 5: gas storage tank; 6: full mirror; 7: laser pulse beam; 8: spray gun; 9: air valve; 10: particle flow; 11: workpiece; 12: workbench; 13: lead screw; 14: wire feed roller; 15: spray wire; 16: wire disc; 17: water nozzle; 18: water valve; 19: reducer; 20: wire feeding motor; 21: coating; 22: first gasket; 23: screw; 24: motor mounting bracket; 25: bolt; 26: second gasket; 27: motor; 28: motor base; 29: Stud stud with shoulder; 30: first thin nut; 31: third gasket; 32: upper fixing plate; 33: focusing lens; 34: fourth gasket; 35: first nut; 36: opening and closing Nut; 37: second thin nut; 38: second nut; 39: base; 40: third nut; 41: stud.

Detailed ways:

The device of the present invention includes a laser generator 1, a light guiding and focusing system, a control system, a gas storage system, a water spray system, a workpiece clamping system and a wire feeding system. Wherein said light guiding and focusing system comprises total reflection mirror 6, focusing lens 33, base 39, upper fixed plate 32, stud 41, stud 29 with shoulder, the first thin nut 30, the second Thin nut 37, second nut 38, third nut 40, first nut 35, third gasket 31, fourth gasket 34, split nut 36, lead screw 13, motor 27, motor mounting bracket 24, bolt 25 , the second gasket 26 and the motor base 28 . The gas storage system includes a gas storage tank 5 , a gas valve 9 , and an air guide tube 4 . Described sprinkler system is made up of sprinkler head 17, water valve 18 and the water pipe that connects them. The wire feeding system includes a symmetrical wire feeding motor 20 , a speed reducer 19 , a spraying wire 15 , a wire feeding roller 14 and a wire reel 16 . The workpiece clamping system includes a spray gun 8 , a workpiece 11 and a workbench 12 . The control system includes a computer 2 and a controller 3 . The motor 27 can drive the base 39 and the focusing lens 33 etc. to move up and down freely through the lead screw 13, the split nut 36 and the stud 41.

After the above-mentioned components of the system are installed, the surface of the workpiece 11 to be sprayed is cleaned to remove grease, scale and other dirt on the surface. Coat a layer of black organic matter with a thickness of about 100 μm on the surface of the cleaned workpiece 11 as a laser energy absorbing layer, and then fix the workpiece 11 with the absorbing layer on the workbench 12, and the energy absorbing layer faces the spray gun 8 ports.

The controller 3 accepts the instructions from the computer 2, and the motor 27 drives the split nut 36 to move up and down through the rotation of the lead screw 13 to adjust the height of the focusing lens 33, so that the laser pulse beam 7 passes through the focusing lens 33 and irradiates on the surface of the absorbing layer A light spot with a diameter in the range of 0.2-1.5 mm is formed, and the water nozzle 17 is turned on to form a flowing water layer with a thickness of 2 mm on the surface of the workpiece 11 to be treated. The laser generator 1 emits an optimized laser pulse beam 7 , the beam mode of the laser pulse beam 7 can be various modes such as fundamental mode and multi-mode, and the beam mode, output energy and frequency are regulated and controlled by the controller 3 . The laser pulse beam 7 passes through the total reflection mirror 6 to change the propagation direction, passes through the focusing lens 33, the spray gun 8 and the flowing water layer, and then irradiates the absorbing layer. Under the action of the constrained layer, a shock wave with a pressure of GPa level is generated on the surface of the workpiece 11 to be sprayed, causing plastic deformation on the surface of the workpiece 11, forming micro pits, and producing a certain thickness of residual compressive stress layer. The workbench 12 moves in the horizontal plane after receiving the instruction from the controller 3 , so as to ensure that micro pits with a certain interval are formed on the entire surface of the workpiece 11 to be sprayed.

Afterwards, the air valve 9 opens after receiving the instruction, the protective gas enters the spray gun 8, and the opening of the water valve 18 also increases, so that the water flow velocity is above 30m/s. The absorbing layer is removed, then the water valve 18 is closed, and after the gas dries the surface of the workpiece 11 to be sprayed, the motor 27 rotates after receiving the instruction of the controller 3, and the rotation of the driving screw 13 makes the split nut 36 move up and down. It is used to adjust the height of the focusing lens 33, so that the laser pulse beam 7 is focused on the position where the spraying wire 15 meets after passing through the focusing lens 33. According to the diameter of the spraying wire 15 and the melting point of the material, the energy of the laser pulse beam 7 is adjusted by the controller 3 Adjust the power density of the laser to 10 ⁴ -10 ⁶ W/cm ² , and adjust the upper and lower positions of the workbench 12 so that the distance between the surface of the workpiece 11 to be sprayed and the outlet of the spray gun 8 is 10-15 mm. The wire-feeding motor 20 is turned on, and the spraying wire 15 is driven by the wire-feeding motor 20 to drive the reducer 19 to be continuously sent to the outlet of the spray gun 8 through the wire-feeding roller 14 . After the spraying wire 15 is irradiated by the laser pulse beam 7, it is rapidly melted into liquid droplets, and the high-pressure protective gas atomizes the liquid droplets rapidly, and blows the atomized particle stream 10 to hit the surface of the workpiece 11 at high speed. A coating 21 is formed on the surface to realize spraying. The workbench 12 moves in the horizontal plane to complete the spraying of a layer of coating. According to the thickness requirements of the coating 21, increase the number of movement cycles of the workbench 12 to increase its thickness. When the thickness meets the requirements, turn off the laser generator 1 and wire feeding Motor 20 and air valve 9, take off workpiece 11, finish spraying.

Claims (2)

1. a kind of method based on laser processing technology prepares coating, it is characterised in that specific step is as follows for this method:

(1) the black organic matter of a layer thickness 0.05mm is coated on the workpiece of dried and clean (11) surface to be sprayed, it is described black Color organic matter is fixed on workbench (12) as absorbed layer, then by the workpiece (11), opens the water valve of sprinkler head (17) (18), the flowing water layer of 2mm thickness is formed on the workpiece (11) surface to be sprayed, water velocity is 2~5m/s；Laser pulse Beam (7) passes through condenser lens (33) post-concentration, by the up and down motion of the workbench (12) and the condenser lens (33), The surface of the workpiece (11) forms the hot spot that diameter is 0.2~1.5mm, power density GW/cm²The laser pulse beam (7) it passes through flowing water layer to be irradiated on the absorbed layer, the absorbed layer absorbs gasification, ionization after laser energy, is formed high Warm high pressure plasma, the high temperature and pressure plasma expands in a very short period of time, and the effect of contraction by water layer, generates The shock wave of GPa magnitude, the shock wave make the workpiece (11) surface form the dimple hole being plastically deformed and residual compressive stress； The workbench (12) is move in the horizontal plane, forms plastic deformation in the another location of the workpiece (11) surface to be treated Dimple hole and residual compressive stress, the dimple hole that the distribution of certain density dot matrix is presented is generated on the workpiece (11) surface；

(2) air valve (9) for opening air accumulator (5), enters the protective gas of pressure 0.5-1.5MPa in spray gun (8), adjusts The opening degree of the water valve (18), makes water velocity reach 30m/s or more, washes away He Chong jointly by gas and high pressure water flow It washes, removes the not ablated absorbed layer of the workpiece (11) surface residual, be then turned off the water valve (18), gases is waited to dry up Behind the workpiece (11) surface to be sprayed, mobile focusing lens pedestal (39) adjusts the position of the condenser lens (33), makes institute It states laser pulse beam (7) to focus on the position that the Spray Wire (15) being symmetrical set crosses, the Spray Wire (15) is by sending Silk motor (20) drives retarder (19) to be sent by wire pushing roller (14), adjusts the pulse energy of the laser pulse beam (7), Make its power density 10⁴~10⁶W/cm², the Spray Wire (15) by the laser pulse beam (7) irradiate after be molten into rapidly Liquid droplets are atomized into rapidly particle by liquid droplets, high voltage protective gas, and work described in particle high-speed impact is moved in high voltage protective air-blowing Part (11) surface forms coating (21) on the workpiece (11) surface, realizes primary spraying, pass through the water of the workbench (12) Flat movement is repeatedly sprayed, to complete the spraying of the workpiece (11) whole surface.

2. a kind of device based on laser processing technology prepares coating, it is characterised in that the device includes laser generator (1), leads Light and focusing system, control system, gas storage system, water injection system, clamping workpiece system and wire feed system；The laser generator (1) short-pulse laser and continuous laser can be issued；Described guide-lighting and focusing system include total reflective mirror (6), condenser lens (33), Pedestal (39), upper mounted plate (32), studs (41), band shoulder studs (29), the first thin nut (30), the second thin spiral shell Female (37), the second nut (38), third nut (40), the first nut (35), third gasket (31), the 4th gasket (34), folding Nut (36), lead screw (13), motor (27), motor mounting rack (24), bolt (25), the second gasket (26) and motor base (28), the condenser lens (33) is arranged in the pedestal (39), passes through fixed plate (32) and the pedestal (39) Threaded connection, the condenser lens (33) is fixed on the pedestal (39), the one of the band shoulder studs (29) End is connect by screw thread with the pedestal (39), is tightened by second nut (38) and the third gasket (31), described The other end with shoulder studs (29) is equipped with the first thin nut (30) and the second thin nut (37), first thin nut (30) it relies on the frictional force between them mutual and tight with second thin nut (37) and fixes their positions, spray gun (8) There are gaps between wall and the shoulder and second thin nut (37) of the band shoulder studs (29), make the band shoulder Studs (29) can be moved freely up and down, and one end of the studs (41) is connected by screw thread and the pedestal (39) It connects, is tightened by the third nut (40) and the 4th gasket (34), the other end of the studs (41) passes through spiral shell Line connects clasp nut (36), and tightens fixation by the first nut (35), the lead screw (13) and the clasp nut (36) It is threadedly coupled, the other end of the lead screw (13) connect with the motor (27) and driven by it, and the motor base (28) is logical It crosses bolt (25) and the motor (27) is fixed on rectangular-shaped motor mounting rack (24) by the second gasket (26), the electricity Machine mounting bracket (24) is fixed on the spray gun (8) wall by screw (23) and the first gasket (22), the condenser lens (33) position by clasp nut (36) described in the motor (27) and the lead screw (13) rotate driving move up and down into Row is adjusted；The gas storage system includes air accumulator (5), air valve (9) and gas-guide tube (4), and one end of the gas-guide tube (4) connects storage The other end of gas tank (5), the gas-guide tube (4) connects the spray gun (8) by the air valve (9), and the air valve (9) is opened Afterwards, protection gas is entered in the spray gun (8) by the air accumulator (5) through the gas-guide tube (4)；The water injection system includes water spray The top of workbench 12 is arranged in head (17), water valve (18) and connection water pipe, the water injection system；The wire feed system includes a left side Right symmetrical wire feeding motor (20), retarder (19), Spray Wire (15), wire pushing roller (14) and wire tray (16), the wire feed electricity After machine (20) is opened, the revolving speed of output drives the wire pushing roller (14) to rotate, will be wound on after the retarder (19) reduction of speed The Spray Wire (15) in the wire tray (16) moves forward, and realizes wire feed；The clamping workpiece system include spray gun (8), Workpiece (11) and workbench (12), the spray gun (8) are located at the surface of workbench (12), and the two sides of the spray gun (8) are equipped with Narrow slot passes through convenient for the band shoulder studs (29) and the studs (41), and the workpiece (11) is fixed on described in work Make on platform (12), the workpiece (11) moves together in company with the workbench (12)；The control system include computer (2) and Controller (3), controller (3) information are inputted by the computer (2), and the controller (3) is for controlling the laser The frequency and energy of the laser pulse beam (7) of the sending of generator (1) control the workbench (12) mobile direction and speed Degree, controls the revolving speed and revolution of the wire feeding motor (20) and the motor (27), controls the water valve (18) and the air valve (9) size of switch and opening degree.