CN101890576A - Laser tailor welding alignment clamping device and method for stainless steel or nickel thin plate - Google Patents

Abstract

The invention discloses an alignment clamping device and method for laser tailor welding of stainless steel or nickel thin plates, including an XYZ three-dimensional translation RZ one-dimensional rotation movement mechanism, a video monitoring alignment adjustment mechanism, and a magnet pneumatic clamping mechanism. Stainless steel or nickel The thin plate laser tailor welding alignment clamping device adopts XYZ three-dimensional translation RZ one-dimensional rotation movement mechanism and video monitoring alignment adjustment mechanism to align and position the thin plate, and then the stainless steel or nickel thin plate is clamped and fixed by the magnet pneumatic clamping mechanism. Realize tailor welding of stainless steel or nickel sheet. The invention can solve the problem of difficult welding due to the deformation of the thin plate itself and the deformation of the thin plate caused by thermal stress during laser tailor welding of the stainless steel or nickel thin plate with a thickness less than 0.3mm, so as to ensure the quality of the spliced weld seam.

Description

Laser tailor welding alignment clamping device and method for stainless steel or nickel thin plate

technical field

The invention relates to a stainless steel or nickel thin plate laser tailor welding alignment clamping device and method, belonging to the application field of laser fine processing technology.

Background technique

The application of laser welding is becoming more and more widespread. Because the stainless steel or nickel plate with a thickness of less than 0.3mm is very thin, it is easy to deform and bend, and the contact surface of the two thin plates is small, and it is easily deformed after being heated during laser welding, and the amount of deformation is large. , which brings considerable difficulty to tailor welding, so the alignment of the splicing position and the positioning and clamping of the thin plate are extremely critical during thin plate tailor welding. At present, the alignment and positioning of tailor-welded thin-plate welds mainly rely on the experience of operators, who use eyes to distinguish alignment, manually move to adjust the welding position, and then use pressure plates and screws to fix the thin plates. Its disadvantages are: 1. Large arbitrariness, difficult to find the welding position, poor positioning accuracy, which affects the welding quality; The joints are inconsistent; 3. The distance between the edge of the supporting plate and the pressure plate holding the thin plate is large from the welding seam of the thin plate. Due to the extremely thin thickness of the plate, the welded part of the thin plate is deformed by heat, and the high quality and consistency of all seams at the welded part cannot be guaranteed.

The patent application No. 200410015618.1 discloses a workpiece clamping device provided for laser sheet cutting and welding machines, which adopts a plurality of electromagnets and a plurality of pneumatic clamping mechanisms to automatically clamp and position the workpiece under the control of a microcomputer. Although automation is realized, the process of workpiece positioning control and image processing is complicated, and the positioning accuracy is affected by the captured image signal. In addition, the clamping electromagnet and the pneumatic clamping mechanism are widely distributed, and the thin plate is easily deformed by heat during welding. It cannot ensure that the entire welding edge of the thin plate, especially the thin plate with a thickness less than 0.3m, is evenly clamped and welded.

The patent with application number 200820062771.3 describes a fixture for welding thin plates with a welding torch. Although the upper and lower pressure plates are used to evenly press the two thin plates, the distance between the edges of the two thin plates to be welded is 1.5-2 mm, and the weld seam is wide. It cannot be welded without solder. Welded together, it cannot meet the tailor welding requirements of thin plates.

Contents of the invention

The object of the present invention is to provide a device and method for laser tailor welding alignment and clamping of stainless steel or nickel thin plates in order to overcome the shortcomings of the existing splicing position alignment and thin plate positioning and clamping technology during thin plate tailor welding.

The technical solution of the present invention is: an alignment clamping device for laser tailor welding of stainless steel or nickel thin plates, which is characterized in that it includes a laser head, XYZ three-dimensional translation RZ one-dimensional rotation movement mechanism, video monitoring alignment adjustment mechanism and magnet Pneumatic clamping mechanism, the XYZ three-dimensional translation RZ one-dimensional rotary motion mechanism includes an X-axis horizontal translation platform, a Y-axis horizontal translation platform, a Z-axis vertical translation platform and an RZ rotary platform that rotates around the Z axis. The X-axis movement direction is the first The splicing direction of a thin plate and the second thin plate is perpendicular to the Y axis and the X axis, and the laser head is connected to the Z vertical translation stage; the video monitoring alignment adjustment mechanism includes a CCD camera system, a crosshair, a video monitor, substrate, positioning pins and alignment blocks, the alignment pins are used to position the alignment block, the alignment block positions the first vacuum chuck pallet and the second vacuum chuck pallet, the first magnetic pressure plate and the second magnetic pressure plate, and Position block positioning and clamping of the first thin plate and the second thin plate, the crosshairs are connected with the CCD camera system, and the alignment surface of the alignment block and the welding surface of the first thin plate and the second thin plate are on an imaging surface , the video monitor is connected with the CCD camera system, and the CCD camera system is connected with the laser head; the magnet pneumatic clamping mechanism includes the first vacuum chuck pallet and the second vacuum chuck pallet, the first magnetic pressure plate and the second Magnetic pressure plate, crystal glass pressure plate, first cylinder group and second cylinder group, lateral pressure plate, elastic element composed of tension spring and pressure spring, made of steel material with multiple air holes on the surface The first vacuum chuck pallet and the second vacuum chuck pallet are attracted to the first magnetic pressure plate and the second magnetic pressure plate, and the vacuum suction force of the vacuum chuck pallet and the magnetic force of the magnetic pressure plate are used to clamp the thin plate to be welded to realize the initial compression. The elastic element compacts the seam between the first thin plate and the second thin plate, and then uses the first cylinder group and the first cylinder group to compress the first thin plate and the second thin plate to realize the positioning and clamping of the tailor-welded thin plates. It is especially suitable for the alignment, positioning and clamping of the tailor welding position of stainless steel or nickel thin plates with a thickness less than 0.3mm during laser tailor welding.

The structure of the XYZ three-dimensional translation RZ one-dimensional rotary motion mechanism is that the X-axis translation platform is fixed on the base of the device, the one-dimensional rotary platform is fixed on the X-axis translation platform, and the Y-axis translation platform is fixed on the gantry of the base On the beam, the Z-axis translation platform is fixed on the Y-axis translation platform.

The two sides of the alignment block are in a concave shape, and the vacuum suction cup pallet, thin plate and magnetic pressure plate are positioned at the same time. The two ends of one side are concave and the concave surface of the concave shape is concave by 0.5-1mm, which is the splicing of the first thin plate and the second thin plate. The height of the two ends of the alignment block is consistent with the welding surface of the first thin plate and the second thin plate.

Using the above alignment clamping device for laser tailor welding of stainless steel or nickel thin plates, the alignment method for laser tailor welding of stainless steel and nickel thin plates includes the following steps:

1) Fix the two positioning pins on the base plate, the right side of the alignment block is close to the two positioning pins, and then fix it on the base plate with screws;

2) Put the alignment surface of the crosshair and the alignment block and the welding surface of the two thin plates on an imaging surface, and the focus can be adjusted up and down by moving the Z translation stage, and the alignment block can be observed on the video monitor through the CCD The relative position of the two sides of the two ends and the intersection point of the cross wire, turn the RZ rotary platform, move the Y-axis translation stage, adjust the relative position of the concave side at both ends of the alignment block and the cross wire, move the X translation table back and forth, and repeatedly fine-tune RZ rotary platform and Y translation platform, so that the concave sides at both ends of the alignment block are always at the intersection of the cross wires, lock the RZ rotary platform and Y translation platform, complete the alignment of the thin plate splicing seam, and ensure the laser welding spot Always on the seam of the two sheets.

One of the positioning and clamping methods for laser tailor welding of stainless steel and nickel thin plates using the above-mentioned alignment clamping device for laser tailor welding of stainless steel or nickel thin plates, including the following steps:

1) Put the side of the first vacuum suction cup pallet close to the side of the alignment block with both ends recessed, and then fix it on the base

On the board, the first thin plate is placed on the first vacuum chuck pallet close to one side of the alignment block and sucked by vacuum, and the first magnetic pressing plate is placed on the first thin plate and also close to one side of the alignment block. And the first thin plate is clamped by the magnetic force between the steel first vacuum chuck pallet. Because the two sides of the alignment block are concave, the first thin plate protrudes 0.5 from the side of the first vacuum chuck pallet and the first magnetic pressure plate. -1mm, which is consistent with the size of the depression on one side of the alignment block, to complete the initial compression of the first thin plate;

2) Start the first cylinder group, press the first magnetic plate from top to bottom, and press the first thin plate to complete the first

Positioning and clamping of thin plates;

3) Place the second vacuum suction cup pallet on the other side of the positioning block and fix it on the base plate through a tension spring.

Stick to the other side of the alignment block, the other side of the second vacuum suction cup pallet is laterally acted by the compression spring, making it close to the alignment block, and the second thin plate is placed on the second vacuum suction cup pallet to closely align The other side of the block is sucked by vacuum, and the second magnetic pressing plate is placed on the second thin plate and is also close to the other side of the alignment block, and is clamped by the magnetic force with the second steel vacuum chuck pallet Hold the second thin plate, because the two sides of the alignment block are concave, the second thin plate protrudes 0.5-1mm from the side of the second vacuum suction cup pallet and the second magnetic pressure plate, which is consistent with the concave size on the other side of the alignment block, complete Initial compaction of the second sheet;

4) Remove the alignment block fixed on the substrate, and the second vacuum suction cup pallet is laterally acted by the compression spring, so that the second

The thin plate is close to the first thin plate, and the lateral force of the compression spring is smaller than the clamping force of the second vacuum suction cup pallet and the second magnetic pressure plate to the second thin plate, so as to ensure that the second thin plate is in contact with the second vacuum suction cup pallet and the first vacuum suction cup pallet. The relative positions of the two magnetic pressing plates remain unchanged;

5) Start the second cylinder group, press the second magnetic plate from top to bottom, and press the second thin plate to complete the second

Positioning and clamping of thin plates;

6) Turn on the laser and the X translation table to realize laser sheet tailor welding in the X direction.

Using the alignment clamping device for laser tailor welding of stainless steel or nickel thin plates, the second positioning and clamping method for laser tailor welding of stainless steel and nickel thin plates includes the following steps:

1) Put the side of the first vacuum suction cup pallet close to the side of the alignment block with both ends recessed, and then fix it on the base

On the board, the first thin plate is placed on the first vacuum chuck pallet close to one side of the alignment block and sucked by vacuum, the first magnetic pressing plate is placed on the first thin plate, and the outer side of the first thin plate is pressed, and The first thin plate is clamped by the magnetic force between the steel first vacuum chuck pallet. Because the two sides of the alignment block are concave, the first thin plate protrudes from the side of the first vacuum chuck pallet by 0.5-1mm, and the opposite The size of the depression on one side of the block is the same, and the initial compression of the first thin plate is completed;

2) The second vacuum suction cup pallet is placed on the other side of the positioning block, fixed on the substrate by a tension spring, and one side is close to the

On the other side of the alignment block, the other side of the second vacuum suction cup pallet is laterally acted by the compression spring, making it close to the alignment block, and the second thin plate is placed on the second vacuum suction cup pallet and close to the alignment block The other side of the second thin plate is vacuum sucked, and the second magnetic platen is placed on the second thin plate, pressed against the outside of the second thin plate, and clamped by the magnetic force with the second steel vacuum chuck pallet. The thin plate is also close to the other side of the alignment block, and the second thin plate is clamped by the magnetic force between the steel second vacuum chuck pallet. Because the two sides of the alignment block are concave, the second thin plate protrudes from the first The side of the second vacuum suction cup pallet is 0.5-1mm, which is consistent with the size of the depression on the other side of the alignment block, and the initial compression of the second thin plate is completed;

3) Remove the alignment block fixed on the substrate, and the second vacuum suction cup pallet is laterally acted by the compression spring, so that the second

The thin plate is close to the first thin plate, and the lateral force of the compression spring is smaller than the clamping force of the second vacuum chuck pallet and the second magnetic pressure plate to the second thin plate, so as to ensure that the second thin plate is compatible with the second vacuum chuck pallet and The relative position of the second magnetic pressing plate remains unchanged;

4) Place a crystal glass plate whose width is smaller than the distance between the first magnetic plate and the second magnetic plate

On the first thin plate and the second thin plate, start the first cylinder group and the second cylinder group, support the two sides of the crystal glass pressing plate from top to bottom, press the first thin plate and the second thin plate simultaneously, and complete the first thin plate and the second thin plate. Positioning and clamping of thin plates;

5) Turn on the laser and the X translation table to realize laser sheet tailor welding in the X direction.

the

The beneficial effects of the present invention are: to provide a stainless steel or nickel thin plate laser tailor welding aligning and clamping device and method, especially for the alignment of the splicing position and the positioning and clamping of the thin plate during laser tailor welding of stainless steel or nickel thin plates with a thickness less than 0.3mm It is more effective and solves the problem of the thin plate itself being easily deformed and thermal stress during welding. .

Description of drawings

Fig. 1 Frame diagram of alignment clamping device for thin plate laser tailor welding;

Figure 2 is a schematic diagram of the overall structure of the thin plate laser tailor welding alignment clamping device;

Fig. 3 Schematic diagram of alignment block structure;

Fig. 4 is a schematic structural diagram of the magnet pneumatic clamping mechanism installed on the substrate;

Fig. 5 is a schematic diagram of a positioning and clamping structure using a crystal glass pressing plate.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

An alignment clamping device for laser tailor welding of stainless steel or nickel thin plates, as shown in Figure 1, Figure 2, Figure 4, and Figure 5, which includes a laser head 8, an XYZ three-dimensional translation RZ one-dimensional rotary motion mechanism 1, a video Monitor the alignment adjustment mechanism 2 and the magnet pneumatic clamping mechanism 3. The XYZ three-dimensional translation RZ one-dimensional rotary motion mechanism 1 includes the X-axis horizontal translation platform 4, the Y-axis horizontal translation platform 5, the Z-axis vertical translation platform 6 and the Z-axis horizontal translation platform. The RZ rotary table 7 that rotates on the axis, the X-axis movement direction is the splicing direction of the first thin plate 17 and the second thin plate 18, the Y axis is orthogonal to the X axis, and the laser head 8 is connected with the Z vertical translation table 6, When the Z translation stage 6 moves up and down, the laser head 8 and the CCD camera system 9 move up and down together to adjust the positions of the imaging surface of the CCD camera system 9 and the welding point. Described video monitor alignment adjustment mechanism 2 comprises CCD camera system 9, crosshair 10, video monitor 11, substrate 12, alignment pin 13 and alignment block 14, alignment pin 13 is used for positioning alignment block 14, alignment The block 14 positions the first vacuum chuck pallet 15 and the second vacuum chuck pallet 16, the first magnetic platen 19 and the second magnetic platen 20, and the alignment block 14 positions and clamps the first thin plate 17 and the second thin plate 18, The crosshair 10 is connected with the CCD camera system 9, and the alignment surface of the alignment block 14 and the welding surface of the first thin plate 17 and the second thin plate 18 are on an imaging plane, and the video monitor 11 and the CCD Camera system 9 is connected, and CCD camera system 9 is connected with laser head 8.

The magnet pneumatic clamping mechanism 3 is fixed on the base plate 12 of the video alignment adjustment mechanism 2 , and the base plate 12 is fixed on the RZ one-dimensional rotating platform 7 . Described magnet pneumatic clamping mechanism 3 comprises the first vacuum chuck pallet 15 and the second vacuum chuck pallet 16, the first magnetic pressing plate 19 and the second magnetic pressing plate 20, crystal glass pressing plate 24, the first cylinder group 25 and the second Cylinder group 26, lateral pressing plate 21, the elastic element that is made up of extension spring 22 and stage clip 23, the first vacuum chuck pallet 15 and the second that are made of steel material and are provided with a plurality of air holes on the surface The vacuum chuck pallet 16 is attracted to the first magnetic pressure plate 19 and the second magnetic pressure plate 20, the vacuum suction force of the vacuum chuck pallet and the magnetic force of the magnetic pressure plate clamp the sheet to be welded to realize the initial compression, and the elastic element makes the first piece The seams of the thin plate 17 and the second thin plate 18 are compacted, and then the first cylinder group 25 and the second cylinder group 26 are used to compress the first thin plate 17 and the second thin plate 18 to realize the positioning and clamping of the tailor-welded thin plates.

As shown in Figure 2, the structure of the XYZ three-dimensional translation RZ one-dimensional rotary motion mechanism is that the X-axis translation platform 4 is fixed on the base 27 of the device, and the RZ rotary platform 7 rotating around the Z axis is fixed on the X-axis translation platform 4. The Y-axis translation platform 5 is fixed on the gantry beam 28 of the base 27 , and the Z-axis translation platform 6 is fixed on the Y-axis translation platform 5 .

As shown in Figure 3, the two sides of the alignment block 14 are in concave shape, and the vacuum chuck pallets 15, 16, thin plates 17, 18 and magnetic pressure plates 19, 20 are positioned at the same time, and the relative positions of the edges of the three are kept within 0.5-1 mm. Parallel to each other, no need to adjust the spacing and parallelism, ensure the uniformity of pressure and the quality of welding, and realize the integration of alignment and positioning. The position of the welding seam where the first thin plate 17 and the second thin plate 18 are spliced, the height of the two ends of the alignment block 14 is consistent with the welding surface of the first thin plate 17 and the second thin plate 18 .

Using the above alignment clamping device for laser tailor welding of stainless steel or nickel thin plates, the alignment method for laser tailor welding of stainless steel and nickel thin plates includes the following steps:

1) Fix the two positioning pins 13 on the base plate 12, the right side of the alignment block 14 is close to the two positioning pins 13, and then fix it on the base plate 12 with screws.

2) Put the alignment surface of the crosshair 10 and the alignment block 14 and the welding surfaces of the thin plates 17 and 18 on an imaging surface,

The focus can be adjusted up and down by the movement of the Z translation stage 6, and the relative positions of the two ends of the alignment block 14 and the intersection of the crosshairs 10 can be observed on the video monitor 11 through the CCD9. Rotating the RZ rotary platform 7 and moving the Y-axis translation platform 5 can adjust the relative positions of the concave sides at both ends of the alignment block 14 and the crosshairs 10 . Move the X translation stage 4 back and forth, fine-tune the RZ rotation stage 7 and the Y translation stage 5 repeatedly, so that the concave sides at both ends of the alignment block 14 are always on the intersection of the cross wires 10 . Lock the RZ rotary platform 7 and the Y translation platform 5 to complete the alignment of the splicing seam of the thin plates, and ensure that the laser welding spot is always on the splicing seam of the two thin plates.

Using the above-mentioned alignment clamping device for laser tailor welding of stainless steel or nickel thin plates, one of the positioning and clamping methods for laser tailor welding of stainless steel and nickel thin plates, two methods are used:

1) One of the positioning and clamping methods, as shown in Figure 4, includes the following steps:

a) Put the side of the vacuum suction cup pallet 15 close to the side of the alignment block 14 with both ends sunken, and then fix it on

On the substrate 12 , the thin plate 17 is placed on the vacuum chuck pallet 15 close to one side of the alignment block 14 and sucked by vacuum. The magnetic pressing plate 19 is placed on the thin plate 17 and is also close to one side of the alignment block 14 , and the thin plate 17 is clamped by the magnetic force between it and the steel vacuum chuck pallet 15 . Because the two sides of the alignment block 14 are concave, the thin plate 17 protrudes from the side of the vacuum chuck pallet 15 and the magnetic pressure plate 19 by 0.5-1mm, which is consistent with the concave size of one side of the alignment block 14, and the initial compression of the thin plate 17 is completed. .

b) Start the cylinder group 25, withstand the magnetic pressure plate 19 from top to bottom, press the thin plate 17 tightly, and complete the thin plate 17

positioning clamping.

c) The vacuum suction cup pallet 16 is placed on the other side of the positioning block 14, and fixed on the base plate 14 by a tension spring 22,

One side is close to the other side of the alignment block 14 , and the other side of the vacuum chuck pallet 16 is laterally acted by the compression spring 23 , making it close to the alignment block 14 . The thin plate 18 is placed on the vacuum chuck pallet 16 close to the other side of the alignment block 14 and sucked by vacuum. The magnetic pressing plate 20 is placed on the thin plate 18 and also close to the other side of the alignment block 14 , and the thin plate 18 is clamped by the magnetic force between it and the steel vacuum chuck pallet 16 . Because the two sides of the alignment block 14 are concave, the thin plate 18 protrudes from the side of the vacuum chuck pallet 16 and the magnetic pressure plate 20 by 0.5-1 mm, which is consistent with the size of the depression on the other side of the alignment block 14, and the initial compression of the thin plate 18 is completed. .

d) Remove the alignment block 14 fixed on the substrate 12, and the vacuum chuck pallet 16 is laterally acted by the compression spring 23, so that the sheet 18 is close to the sheet 17. The lateral force of the compression spring 23 is less than the clamping force of the vacuum chuck pallet 16 and the magnetic platen 20 to the thin plate 18, so as to ensure that the relative positions of the thin plate 18, the vacuum chuck pallet 16 and the magnetic platen 20 remain unchanged.

e) Start the cylinder group 26, press the magnetic plate 20 from top to bottom, press the thin plate 18, and complete the thin plate 18

positioning clamping.

f) Turn on the laser and the X translation table 4 to realize laser sheet tailor welding in the X direction.

2) The second method of positioning and clamping, as shown in Figure 5, includes the following steps:

a) Put the side of the vacuum suction cup pallet 15 close to the side of the alignment block 14 with both ends sunken, and then fix it on the base

On the plate 12, a thin plate 17 is placed on the vacuum chuck pallet 15 close to one side of the alignment block 14 and sucked by vacuum. Place the magnetic pressing plate 19 on the thin plate 17, press the outer side of the thin plate 17, and clamp the thin plate 17 by the magnetic force between it and the steel vacuum chuck pallet 15. Because the two sides of the alignment block 14 are concave, the thin plate 17 protrudes from the side of the vacuum suction cup pallet 15 by 0.5-1mm, which is consistent with the concave size of the side of the alignment block 14, and the initial compression of the thin plate 17 is completed.

b) The vacuum chuck pallet 16 is placed on the other side of the positioning block 14, and is fixed on the base plate 12 by a tension spring 22.

One side is close to the other side of the alignment block 14, and the other side of the vacuum chuck pallet 16 is laterally acted by the compression spring 23, making it close to the alignment block 1. The thin plate 18 is placed on the vacuum chuck pallet 16 close to the other side of the alignment block 14 and sucked by vacuum. Place the magnetic pressing plate 20 on the thin plate 18, press the outer side of the thin plate 18, and clamp the thin plate 18 by the magnetic force between it and the steel vacuum chuck pallet 16. It is also close to the other side of the alignment block 14 and clamps the thin plate 18 by the magnetic force with the steel vacuum chuck pallet 16 . Because the two sides of the alignment block 14 are concave, the thin plate 18 protrudes from the side of the vacuum chuck pallet 16 by 0.5-1mm, which is consistent with the concave size of the other side of the alignment block 14, and the initial compression of the thin plate 18 is completed.

c) Remove the alignment block 14 fixed on the base plate 12, and the vacuum chuck pallet 16 is laterally acted by the compression spring 23,

The sheet 18 is pressed against the sheet 17 . The lateral force of the compression spring 23 is less than the clamping force of the vacuum chuck pallet 16 and the magnetic platen 20 to the thin plate 18, so as to ensure that the relative positions of the thin plate 18, the vacuum chuck pallet 16 and the magnetic platen 20 remain unchanged.

d) Place a crystal glass plate 24 with a width smaller than the distance between the two magnetic pressure plates 19 and 20 on the two thin plates 17 and 18, start the cylinder groups 25 and 26, and hold the two sides of the crystal glass plate 24 from top to bottom, and place the two thin plates 17 and 18 are compressed simultaneously to complete the positioning and clamping of the two thin plates 17 and 18.

e) Turn on the laser and the X translation table 4 to realize laser thin plate tailor welding in the X direction.

The second positioning and clamping method uses a crystal glass plate and a cylinder group to press the two thin plates, so that the splicing edges of the two thin plates are completely flattened, so as to avoid thermal deformation of the thin plates and affect the quality of the weld.

Alignment and clamping method for tailor welding of stainless steel or nickel thin plates In batch processing, after the first alignment is completed, lock the RZ rotary platform and the Y translation platform perpendicular to the direction of tailor welding, so that there is no need to align each time after clamping thin plates position, just locate it.

Claims (6)

1. stainless steel or nickel sheet laser tailor-welding contraposition clamping device is characterized in that it comprises laser head, XYZ

D translation RZ one dimension rotational motion mechanism, video monitoring contraposition guiding mechanism and the pneumatic clamping mechanism of magnet, described XYZ D translation RZ one dimension rotational motion mechanism comprises X-axis horizontal translation platform, Y-axis horizontal translation platform, Z axle vertical translation platform and the RZ turntable that rotates around the Z axle, the X-axis direction of motion is the stitching direction of first thin plate and second thin plate, Y-axis and X-axis quadrature, described laser head is connected with Z vertical translation platform; Described video monitoring contraposition guiding mechanism comprises the CCD camera system, crosshair, video-frequency monitor, substrate, alignment pin and bit block, alignment pin is used to locate bit block, bit block is located the first vacuum cup supporting plate and the second vacuum cup supporting plate, the first magnetic pressing plate and the second magnetic pressing plate, first thin plate of bit block positioning and clamping and second thin plate, crosshair is connected with the CCD camera system, with bit block to plane and first thin plate and second thin plate face of weld on an imaging surface, described video-frequency monitor is connected with the CCD camera system, and the CCD camera system is connected with laser head; The pneumatic clamping mechanism of described magnet comprises the first vacuum cup supporting plate and the second vacuum cup supporting plate, the first magnetic pressing plate and the second magnetic pressing plate, the crystal glass pressing plate, first air cylinder group and second air cylinder group, the side direction pressure strip, the flexible member of forming by extension spring and stage clip, the first vacuum cup supporting plate that made by steel material and be equipped with a plurality of pores on the surface is inhaled with the first magnetic pressing plate and the second magnetic pressing plate mutually with the second vacuum cup supporting plate, by vacuum cup supporting plate pull of vacuum and magnetic pressing plate magnetic force need welding thin plate clamping realization is just compressed, make the seam compacting of first thin plate and second thin plate by flexible member, compress first thin plate and second thin plate with first air cylinder group and second air cylinder group again, realize the positioning and clamping of welding thin plate.

2. stainless steel according to claim 1 or nickel sheet laser tailor-welding contraposition clamping device, it is characterized in that, the structure of described XYZ D translation RZ one dimension rotational motion mechanism is that the X-axis translation stage is fixed on the pedestal of device, the one dimension rotation platform is fixed on the X-axis translation stage, the Y-axis translation stage is fixed on the portal frame crossbeam of pedestal, and Z axle translation stage is fixed on the Y-axis translation stage.

3. stainless steel according to claim 1 or nickel sheet laser tailor-welding contraposition clamping device, it is characterized in that, described bit block two sides are concave shape, while positioning vacuum chuck supporting plate, thin plate and magnetic pressing plate, the two ends side depression of one side and the concave recess 0.5-1mm of concave shape, be the position while welding of first thin plate and second thin plate splicing, the height at bit block two ends is consistent with first thin plate and the second plate sheet welding face.

4. contraposition clamping device that utilizes described stainless steel of claim 1 or nickel thin plate to carry out laser assembly solder, to stainless steel and nickel thin plate carry out laser assembly solder to method for position, comprise the steps:

1) two alignment pins are fixed on the substrate, the right side of bit block is screwed on substrate then near two alignment pins;

2) face of weld to plane and two thin plates with crosshair and bit block is placed on the imaging surface, move and to focus up and down by the Z translation stage, pass through CCD, on video monitor, can observe the relative position in bit block two ends side and crosshair crosspoint, rotate the RZ rotation platform, mobile Y-axis translation stage, adjust the relative position of bit block two ends depression side and crosshair, the X translation stage moves around, finely tune RZ rotation platform and Y translation stage repeatedly, make bit block two ends depression side all the time on the crosspoint of crosshair, locking RZ rotation platform and Y translation stage, finish the position alignment of thin plate splicing seam, guarantee that the laser solder joint is all the time on the splicing seams of two thin plates.

5. a contraposition clamping device that utilizes described stainless steel of claim 1 or nickel thin plate to carry out laser assembly solder carries out one of positioning and clamping method of laser assembly solder to stainless steel and nickel thin plate, comprises the steps:

The side that bit block has two concave ends is close in the side of the first vacuum cup supporting plate, is fixed on base then

On the plate, first thin plate places to be close to a side of bit block and to be held by vacuum on the first vacuum cup supporting plate, the first magnetic pressing plate is placed a side of also being close to bit block on first thin plate, and by and the first vacuum cup supporting plate of steel between magnetic force clamp first thin plate, because of the bit block two sides are concave shape, the outstanding first vacuum cup supporting plate of first thin plate and the first magnetic pressing plate side 0.5-1mm with the depression consistent size of a side of bit block, finish the first of first thin plate and compress;

Start first air cylinder group, withstand the first magnetic pressing plate from top to bottom, first thin plate is compressed, finish first

The positioning and clamping of thin plate;

The second vacuum cup supporting plate is placed the opposite side of locating piece, be fixed on the substrate by extension spring, a side is tight

Paste the another side of bit block, the opposite side of the second vacuum cup supporting plate is subjected to the effect of stage clip side direction, make it near bit block, second thin plate places to be close to the another side of bit block and to be held by vacuum on the second vacuum cup supporting plate, the second magnetic pressing plate is placed the another side of also being close to bit block on second thin plate, and by and the second vacuum cup supporting plate of steel between magnetic force clamp second thin plate, because of the bit block two sides are concave shape, the outstanding second vacuum cup supporting plate of second thin plate and the second magnetic pressing plate side 0.5-1mm, with the depression consistent size of another side of bit block, finish the first of second thin plate and compress;

Take out the bit block that is fixed on the substrate, the second vacuum cup supporting plate is subjected to the side direction effect of stage clip, makes second

Thin plate is close to first thin plate, and the side direction active force of stage clip is less than the second vacuum cup supporting plate and the second magnetic pressing plate to the chucking power of second thin plate, remains unchanged with the relative position of guaranteeing second thin plate and the second vacuum cup supporting plate and the second magnetic pressing plate;

Start second air cylinder group, withstand the second magnetic pressing plate from top to bottom, second thin plate is compressed, finish second

The positioning and clamping of thin plate;

6) open laser and X translation stage, can realize the laser thin plate welding of directions X.

6. contraposition clamping device that utilizes described stainless steel of claim 1 or nickel thin plate to carry out laser assembly solder, stainless steel and nickel thin plate are carried out laser assembly solder the positioning and clamping method two, comprise the steps:

The side that bit block has two concave ends is close in the side of the first vacuum cup supporting plate, is fixed on base then

On the plate, first thin plate places to be close to a side of bit block and to be held by vacuum on the first vacuum cup supporting plate, the first magnetic pressing plate is placed on first thin plate, push down the outside of first thin plate, and by and the first vacuum cup supporting plate of steel between magnetic force clamp first thin plate, because of the bit block two sides are concave shape, the side 0.5-1mm of the outstanding first vacuum cup supporting plate of first thin plate, with the depression consistent size of a side of bit block, finish the first of first thin plate and compress;

The second vacuum cup supporting plate places the opposite side of locating piece, is fixed on the substrate by extension spring, and a side is close to

The another side of bit block, the opposite side of the second vacuum cup supporting plate is subjected to the effect of stage clip side direction, make it near bit block, second thin plate places to be close to the another side of bit block and to be held by vacuum on the second vacuum cup supporting plate, the second magnetic pressing plate is placed on second thin plate, push down the outside of second thin plate, and by and the second vacuum cup supporting plate of steel between magnetic force clamp second thin plate, the another side of also being close to bit block, and by and the second vacuum cup supporting plate of steel between magnetic force clamp second thin plate, because of the bit block two sides are concave shape, the side 0.5-1mm of the outstanding second vacuum cup supporting plate of second thin plate, with the depression consistent size of another side of bit block, finish the first of second thin plate and compress;

Take out the bit block that is fixed on the substrate, the second vacuum cup supporting plate is subjected to the side direction effect of stage clip, makes second

Thin plate is close to first thin plate, and the side direction active force of stage clip is less than the second vacuum cup supporting plate and the second magnetic pressing plate chucking power to second thin plate, remains unchanged with true second relative position of protecting thin plate and the second vacuum cup supporting plate and the second magnetic pressing plate;

4) the crystal glass pressing plate of a width dimensions less than the first magnetic pressing plate and the second magnetic daylight opening placed

On first thin plate and second thin plate, start first air cylinder group and second air cylinder group, withstand crystal glass pressing plate both sides from top to bottom, first thin plate and second thin plate are compressed simultaneously, finish the positioning and clamping of first thin plate and second thin plate;

5) open laser and X translation stage, can realize the laser thin plate welding of directions X.

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