CN118162718A

CN118162718A - Preassembling jig, welding jig and laser welding equipment

Info

Publication number: CN118162718A
Application number: CN202410401667.6A
Authority: CN
Inventors: 陈智深; 杨建林; 杨建乐; 李建平; 徐兆华; 叶凯云; 盛辉; 杨勇; 周学慧
Original assignee: Shenzhen Tete Laser Technology Co Ltd
Current assignee: Shenzhen Tete Laser Technology Co Ltd
Priority date: 2024-04-03
Filing date: 2024-04-03
Publication date: 2024-06-11

Abstract

The invention discloses a preassembling jig, a welding jig and laser welding equipment, wherein the preassembling jig comprises a placement block, a first pressing piece and a second pressing piece, the placement block is provided with a placement surface, the placement surface is used for placing a first workpiece, and the end surface and the side surface of the first workpiece are respectively provided with a second workpiece; the first pressing piece is arranged on the object placing block and is used for pressing the end face, on which the second workpiece is attached, of the first workpiece; the second pressing piece is arranged on the object placing block and is arranged at intervals with the first pressing piece, and the second pressing piece is used for pressing the side face, on which the second workpiece is attached, of the first workpiece. The scheme of the invention is beneficial to improving the efficiency of laser welding.

Description

Preassembling jig, welding jig and laser welding equipment

Technical Field

The invention relates to the technical field of laser processing equipment, in particular to a preassembling jig, a welding jig and laser welding equipment.

Background

In the related art, preassembly tool is including putting thing piece and pressfitting spare, puts the thing piece and is equipped with puts the object plane, puts the object plane and is used for placing the product, and the terminal surface subsides of product are equipped with flexible circuit board, and pressfitting spare is used for pushing down the terminal surface of product to realize flexible circuit board and product and fully laminate, prevent that flexible circuit board perk from breaking away from the laser welding point, improve welding quality then.

However, when the side surface of the product is subjected to light-emitting welding, the preassembling jig is only pressed down on the end surface of the product, and the preassembling jig is detached, so that the mounting direction of the product in the preassembling jig is manually adjusted, the pressing piece presses down the side surface of the product, and the flexible circuit board is fully attached to the side surface of the product. Therefore, the manual disassembly and assembly of the product are needed, so that the efficiency of laser welding is not improved.

Disclosure of Invention

The invention aims to provide a preassembling jig, which aims to avoid the secondary disassembly and assembly of the preassembling jig and improve the efficiency of laser welding.

In order to achieve the above purpose, the pre-installation jig provided by the scheme of the invention comprises a placement block, a first pressing piece and a second pressing piece, wherein the placement block is provided with a placement surface for placing a first workpiece, and the end surface and the side surface of the first workpiece are adhered with a second workpiece; the first pressing piece is arranged on the object placing block and is used for pressing the end face, on which the second workpiece is attached, of the first workpiece; the second pressing piece is arranged on the object placing block and is arranged at intervals with the first pressing piece, and the second pressing piece is used for pressing the side face, on which the second workpiece is attached, of the first workpiece.

Optionally, the object placing block is provided with a first mounting groove, the first pressing piece comprises a first pressing rod and a first pressing claw, and the first pressing rod is rotationally connected with the groove wall of the first mounting groove; the first pressing claw is arranged on one side, away from the wall of the first installation groove, of the first pressing rod, so that the end face, attached with the second workpiece, of the first workpiece is pressed together with the rotation of the first pressing rod.

Optionally, the first pressing piece further includes a first handle, and the first handle is disposed on a side of the first compression bar facing away from the first compression claw.

Optionally, the first pressing piece further includes a pressing head, the pressing head is disposed on one side of the first handle facing the first pressing claw, the first pressing piece is used for pressing one side of the first workpiece end face, and the pressing head is used for pressing the other side of the first workpiece end face.

Optionally, the object placing block is provided with a second mounting groove, the second mounting groove and the first mounting groove are arranged at intervals, the second pressing piece comprises a second pressing rod and a second pressing claw, and the second pressing rod is rotationally connected with the groove wall of the second mounting groove; the second pressing claw is arranged on one side, away from the wall of the second installation groove, of the second pressing rod so as to press the side, provided with the second workpiece, of the first workpiece along with the rotation of the second pressing rod.

Optionally, the second pressing piece further includes a second handle, and the second handle is disposed on a side of the second compression bar facing away from the second compression claw.

Optionally, the object placing surface is concavely provided with an object placing groove, the first workpiece is placed in the object placing groove, and at least one side part of the object placing groove is opened to expose the end face and the side face of the first workpiece.

Optionally, the preassembly fixture further includes a blocking piece, the blocking piece is disposed on the object placing block, and the blocking piece, the first pressing piece and the second pressing piece are disposed at intervals; the separation blade stretches into the storage groove and encloses with the cell wall of storage groove and closes and form the backstop groove, the side of first work piece is equipped with spacing arch, the backstop groove is used for right spacing protruding circumference is spacing.

The invention also provides a laser welding jig, which comprises a fixed seat, a rotating assembly and the preassembling jig, wherein the rotating assembly is arranged on the fixed seat; the object placing block is detachably arranged at the rotating end of the rotating assembly so as to turn over the first workpiece.

The scheme of the invention also provides laser welding equipment, which comprises a laser and the welding jig, wherein the welding jig is arranged on the light emitting side of the laser.

In the technical scheme of the invention, the preassembling jig comprises a placement block, a first pressing piece and a second pressing piece, wherein the placement surface of the placement block is used for placing a first workpiece, and the end surface and the side surface of the first workpiece are adhered with a second workpiece. The first pressing piece is used for pressing the end face, on which the second workpiece is attached, of the first workpiece, and the second pressing piece is used for pressing the side face, on which the second workpiece is attached, of the first workpiece.

Compared with the prior preassembly jig, the jig can only press down the end face of the product, but can not press down the side face of the product at the same time. According to the preassembling jig, the end face and the side face of the first workpiece are pressed simultaneously, so that the preassembling jig is prevented from being disassembled. Therefore, the scheme of the invention is beneficial to improving the efficiency of laser welding.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an embodiment of a fixture according to the present invention;

FIG. 2 is an exploded view of the fixture of FIG. 1;

FIG. 3 is a schematic view of the cooperation structure of the turntable and the positioning base in FIG. 2;

FIG. 4 is a schematic view of the pre-assembled fixture of FIG. 2;

FIG. 5 is an enlarged partial schematic view of FIG. 4 at A;

fig. 6 is a schematic view of the preassembled fixture of fig. 4 from another view angle.

Reference numerals illustrate:

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "a and/or B", including a scheme, or B scheme, or a scheme that is satisfied by both a and B. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

And the laser welding equipment, such as tin melting welding equipment, is used for carrying out laser irradiation melting on the tin material, and the molten and cooled tin material is tightly combined with the workpieces to realize the welding of at least two workpieces into a whole.

FPC (Flexible Printed Circuit Board ) possesses advantages such as free bending, folding, winding. When the product is assembled, the FPC flat cable can be arranged arbitrarily like wires according to the layout of the internal space of the product, so that components can be arranged arbitrarily in the three-dimensional space, and the FPC flat cable is widely applied to miniaturized electronic products such as smart phones, tablet personal computers and the like.

The laser welding equipment comprises a laser and a welding jig, wherein the welding jig is used for clamping a product and a flexible circuit board so as to match the laser to weld the flexible circuit board on the product. Among them, for some products with smaller shape and size, such as batteries, it is inconvenient to use machinery for automatic clamping. Therefore, the product and the flexible circuit board are generally clamped manually by adopting the preassembling jig, the preassembling jig is installed on the equipment, and finally the product and the flexible circuit board are welded by laser.

In view of the above problems, the present invention proposes a preassembling fixture 50, which aims to avoid the re-assembly and disassembly of the preassembling fixture 50 and improve the efficiency of laser welding.

Referring to fig. 1 to 6, in one embodiment of the present invention, the preassembly fixture 50 includes a placement block 51, a first pressing member 531 and a second pressing member 533, where the placement block 51 is provided with a placement surface 515, and the placement surface 515 is used for placing a first workpiece, and an end surface and a side surface of the first workpiece are attached with a second workpiece; the first pressing piece 531 is disposed on the object placing block 51, and is used for pressing the end face of the first workpiece, to which the second workpiece is attached; the second pressing member 533 is disposed on the object placing block 51 and is spaced from the first pressing member 531, and is configured to press the side surface of the first workpiece to which the second workpiece is attached.

The object placing block 51 is provided with an object placing surface 515, and is a block for placing the first workpiece, and the shape of the block is not limited. Wherein, the terminal surface and the side of first work piece paste and are equipped with the second work piece. For example, the first workpiece is selected as a cylindrical battery, the second workpiece is selected as a flexible circuit board, and the flexible circuit board is welded with the end face and the side face of the cylindrical battery.

The preassembling fixture comprises a pressing assembly 53, wherein the pressing assembly 53 comprises a first pressing member 531 and a second pressing member 533. The first pressing member 531 and the second pressing member 533 are components for pressing the second workpiece, so that the second workpiece can be prevented from tilting away from the welding point, and the first workpiece can be pressed and fixed on the object placing plane 515. For example, the first pressing member 531 or the second pressing member 533 includes a rotating shaft and a pressing rod, the rotating shaft is disposed in the mounting groove of the object placing block 51, the pressing rod is connected to the rotating shaft, and the workpiece is pressed along with the rotation of the rotating shaft.

In the technical scheme of the invention, the preassembling fixture 50 comprises a placement block 51, a first pressing member 531 and a second pressing member 533, wherein the placement surface 515 of the placement block 51 is used for placing a first workpiece, and the end face and the side face of the first workpiece are adhered with a second workpiece. The first pressing member 531 is used for pressing the end face, on which the second workpiece is attached, of the first workpiece, and the second pressing member 533 is used for pressing the side face, on which the second workpiece is attached, of the first workpiece.

Compared with the original preassembly jig 50, the pressing-down of the end face of the product can be performed only, and the pressing-down of the side face of the product cannot be performed simultaneously. The preassembling jig 50 of the scheme of the invention realizes the simultaneous pressing of the end face and the side face of the first workpiece, thereby avoiding the disassembly of the preassembling jig 50. Therefore, the scheme of the invention is beneficial to improving the efficiency of laser welding.

Referring to fig. 4, in one embodiment of the present invention, the object placing block 51 is provided with a first mounting groove 517, the first pressing member 531 includes a first pressing rod 5311 and a first pressing claw 5313, and the first pressing rod 5311 is rotatably connected to a groove wall of the first mounting groove 517; the first pressing claw 5313 is disposed on a side of the first pressing rod 5311 facing away from the wall of the first mounting groove 517, so as to press the end surface of the first workpiece, on which the second workpiece is attached, along with rotation of the first pressing rod 5311.

In this embodiment, the first pressing member 531 includes a first pressing rod 5311 and a first pressing claw 5313, and the first pressing claw 5313 is driven to press the end surface of the first workpiece, on which the second workpiece is attached, by the rotation of the first pressing rod 5311, so as to achieve the tight attachment of the first workpiece and the second workpiece, and the first workpiece is further fixed on the object surface 515. In addition, the first pressing member 531 of the present embodiment is beneficial for the first pressing member 531 to press the first workpiece fast.

Optionally, the end face of the first workpiece is provided with a protrusion, the end face of the first pressing claw 5313 for pressing the end face of the first workpiece is provided with an avoidance hole, and the avoidance hole is used for avoiding the protrusion so as to realize light-emitting welding of the laser to the protrusion. Further, in order to achieve the smoothness of press fitting, the press fitting surface of the first press claw 5313 is provided as a flat surface.

Referring to fig. 4, in an embodiment of the present invention, the first pressing member 531 further includes a first handle 5315, where the first handle 5315 is disposed on a side of the first pressing rod 5311 facing away from the first pressing claw 5313.

In this embodiment, the first pressing member 531 further includes a first handle 5315, and the first pressing rod 5311 is manually pushed and pulled by the first handle 5315, thereby facilitating the manual clamping.

Referring to fig. 4, in an embodiment of the present invention, the first pressing member 531 further includes a pressing head 5317, where the pressing head 5317 is disposed on a side of the first handle 5315 facing the first pressing jaw 5313, the first pressing member 531 is configured to be pressed on one side of the first workpiece end surface, and the pressing head 5317 is configured to be pressed on the other side of the first workpiece end surface.

In this embodiment, in order to avoid the first pressing member 531 pressing on a partial side of the end surface of the product, the product is inclined due to uneven stress, which affects the quality of laser welding. Therefore, the first pressing member 531 further includes a pressing head 5317, where the first pressing member 531 is used to press one side of the end face of the first workpiece, and the pressing head 5317 is used to press the other side of the end face of the first workpiece, so as to ensure that the stress of the product is uniform and ensure the quality of laser welding.

Referring to fig. 4, in one embodiment of the present invention, the object placing block 51 is provided with a second mounting groove 519, the second mounting groove 519 and the first mounting groove 517 are spaced apart, the second pressing member 533 includes a second pressing rod 5331 and a second pressing claw 5333, and the second pressing rod 5331 is rotatably connected to a groove wall of the second mounting groove 519; the second pressing claw 5333 is disposed on a side of the second pressing rod 5331 facing away from the wall of the second mounting groove 519, so as to press the side surface of the first workpiece, on which the second workpiece is disposed, along with rotation of the second pressing rod 5331.

In this embodiment, the second pressing member 533 includes a second pressing rod 5331 and a second pressing claw 5333, and the second pressing claw 5333 is driven to press the side surface of the first workpiece, on which the second workpiece is attached, by rotating the second pressing rod 5331, so as to achieve close adhesion between the second workpiece and the second workpiece, and further press fixing of the first workpiece. In addition, the second pressing member 533 of the present embodiment is beneficial for fast pressing the second pressing member 533 against the first workpiece.

Referring to fig. 4, in an embodiment of the present invention, the second pressing member 533 further includes a second handle 5335, where the second handle 5335 is disposed on a side of the second pressing rod 5331 facing away from the second pressing claw 5333.

In this embodiment, the second pressing member 533 further includes a second handle 5335, and the second pressing rod 5331 is manually pushed and pulled by the second handle 5335, so as to facilitate the convenience of manual clamping.

Referring to fig. 4, in one embodiment of the present invention, the object placing surface 515 is concavely provided with a placing groove 5151, the first workpiece is placed in the placing groove 5151, and at least one side portion of the placing groove 5151 is opened to expose an end surface and a side surface of the first workpiece.

The storage groove 5151 is a groove body for placing the first workpiece, and the shape of the groove body is determined according to the shape of the first workpiece, so that the first workpiece can be placed in the storage groove 5151 by a human hand or tweezers. For example, if the first workpiece is a cylindrical battery, the storage groove 5151 is configured as a cylindrical groove with open top and sides. Optionally, the accommodating groove 5151 is in interference fit with the first workpiece, so that preliminary clamping and fixing of the first workpiece are facilitated.

In this embodiment, the object placing surface 515 is concavely provided with a placing groove 5151, the first workpiece is placed in the placing groove 5151, and the top and the side of the placing groove 5151 are opened to expose the end face and the side face of the first workpiece, so that the first pressing member 531 and the second pressing member 533 respectively press the end face and the side face of the first workpiece. Compared with the way of directly placing and clamping the first workpiece on the object placing surface 515, the first workpiece is stored by the object placing groove 5151, preliminary positioning and fixing of the first workpiece are facilitated, the clamping range of the object placing block 51 is reduced, and the integration of components is improved.

Referring to fig. 4 and 5, in an embodiment of the present invention, the preassembly fixture 50 further includes a blocking piece 55, the blocking piece 55 is disposed on the placement block 51, and the blocking piece 55 and the first press-fitting member 531 are spaced from the second press-fitting member 533; the baffle 55 extends into the storage groove 5151 and forms a stop groove 551 with the groove wall of the storage groove 5151, a limit protrusion is arranged on the side surface of the first workpiece, and the stop groove 551 is used for circumferentially limiting the limit protrusion.

In this embodiment, the blocking piece 55 extends into the storage groove 5151 and forms a blocking groove 551 with the groove wall of the storage groove 5151, and the limiting protrusion is circumferentially limited in the blocking groove 551 to limit the circumferential rotation of the first workpiece.

For example, the first workpiece is a cylindrical battery, the end wall of the cylindrical battery is placed in the storage groove 5151, a limiting protrusion is arranged on the side wall of the cylindrical battery, one end of the baffle piece 55 extending into the storage groove 5151 is configured as an arc section, and the bending direction of the arc is matched with the rotation direction of the limiting protrusion, so that the limiting protrusion on the side wall of the cylindrical battery is limited when the cylindrical battery rotates, and the influence on laser processing caused by rotation of the cylindrical battery is avoided.

Referring to fig. 1, the present invention further provides a laser welding jig 100, where the laser welding jig 100 includes a fixing base 10, a rotating assembly 30, and the preassembling jig 50 as described above, and the rotating assembly 30 is disposed on the fixing base 10; the object placing block 51 is detachably mounted at the rotating end of the rotating assembly 30, so as to turn over the first workpiece. The preassembling jig 50 adopts all the technical solutions of all the embodiments, so that it has at least all the advantages brought by the technical solutions of the embodiments, and will not be described in detail herein.

The fixing base 10 is used for realizing the integral installation of the welding jig 100, and realizing the installation of the welding jig 100 on a moving platform of a laser welding device so as to be matched with the light-emitting processing of a laser. For example, the fixing base 10 includes a base plate 11 and a vertical plate 13, the end surface of the base plate 11 is provided with a mounting hole, and a fastener penetrates the mounting hole and the moving platform to mount the base plate 11 to the moving platform. The riser 13 is provided with a mounting slot for mounting the stationary rotating assembly 30.

The rotating assembly 30 is an assembly having a rotating property. For example, the rotating assembly 30 includes a rotating driving member 31 and a turntable 33, and an output end 311 of the rotating driving member 31 is used for driving the turntable 33 to rotate. Wherein the rotary driving member 31 may alternatively be a rotary cylinder. The surface of the turntable 33 is provided with a first fixed magnet 331 and a first mounting magnet 5111 of the first mounting surface 511 of the object placing block 51 for adsorbing and fixing, so as to realize that the object placing block 51 is quickly mounted on the turntable 33. In addition, in order to prevent the object placing block 51 from being thrown out due to overturning, a first limiting post 333 is further protruding on the surface of the turntable 33 to limit the groove wall of the first limiting groove 5113 of the object placing block 51.

The rotating assembly 30 further includes a positioning base 35, where the positioning base 35 includes a first substrate 351 and a second substrate 353, and the second mounting surface 513 of the object placing block 51 is configured to be mounted on one of the first substrate 351 and the second substrate 353. The first substrate 351 is provided with a second fixing magnet 3511 and a second mounting magnet 5131 on the second mounting surface 513 of the object placing block 51 for adsorbing and fixing, so as to realize rapid mounting of the object placing block 51 on the first substrate 351. In addition, in order to avoid the object placing block 51 from being thrown out due to overturning, the second mounting surface 513 is provided with an avoidance groove 5133, the inner wall surface of the avoidance groove 5133 is provided with a second limit groove 51331, and the surface of the first substrate 351 is convexly provided with a second limit post to limit the groove wall of the second limit groove 51331.

Referring to fig. 1, the present invention further proposes a laser welding apparatus, where the laser welding apparatus includes a laser and the welding jig 100 as described above, and the welding jig 100 is disposed on a light emitting side of the laser. The welding jig 100 adopts all the technical solutions of all the embodiments, so that the welding jig at least has all the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein.

Wherein the laser welding equipment is used for carrying out laser welding on at least two workpieces. For example, the laser welding equipment is selected as laser tin melting welding equipment,

The laser is used for carrying out light-emitting melting on the welding flux, and the welding flux after melting and cooling is tightly combined with the workpieces to realize the welding of at least two workpieces into a whole.

In one implementation of the laser welding apparatus, reference is made to the following:

The first workpiece is a cylindrical button cell, an upper lug is convexly arranged on the upper end face of the button cell, and a side lug is convexly arranged on the side face of the button cell. The upper tab is located at one side of the upper end surface, so when the first pressing member 531 is sleeved and pressed on the end surface of the upper tab, the pressing head 5317 needs to be used for pressing the other side of the upper end surface, so as to ensure that the first workpiece is uniformly stressed. Ports are formed in two ends of the flexible circuit board and are respectively sleeved on the upper lug and the side lugs. The button battery with the flexible circuit board arranged on the two-pole earmuff is placed in the storage groove 5151 of the preassembling jig 50, and the flexible circuit board is easy to warp out of the pole lugs, so that the first avoiding hole 53131 and the second avoiding hole 53331 are respectively formed in the first pressing piece 531 and the second pressing piece 533 of the preassembling jig 50, the outer end face of the hole wall of the button battery is used for pressing down and laterally pressing the button battery, and therefore two ends of the flexible circuit board are respectively tightly attached to the upper pole lugs and the side pole lugs and are attached to the upper end face and the side end face of the battery. After the preassembling jig 50 clamps the first workpiece and the second workpiece, a tin ring is arranged on the upper tab of the battery as solder, and finally the preassembling jig 50 is mounted on the turntable 33 and the positioning base 35 of the rotating assembly 30.

After the preassembling jig 50 is mounted on the turntable 33 and the positioning base 35 of the rotating assembly 30, a moving platform of the laser welding device is started, the CCD performs visual positioning on the upper surface of the battery, and after the visual positioning is completed, the upper tab is subjected to laser welding so as to weld one end of the flexible circuit board to the upper tab of the battery. After the laser welding of the upper tab is completed, the preassembly jig 50 is turned by 90 degrees to enable the side tab of the battery to face the light emitting side of the laser, then the side tab of the battery is provided with the side tab as solder, a moving platform of the laser welding equipment is restarted, the CCD performs visual positioning on the side surface of the battery, and after the visual positioning is completed, the side tab is subjected to laser welding so as to weld the other end of the flexible circuit board to the side tab of the battery. After the laser welding is completed, the preassembly jig 50 is removed from the rotary assembly 30, and the first and second pressing claws 5313 and 5333 are respectively separated to remove the battery that is welded to the flexible circuit board.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims

1. The utility model provides a pre-installation tool, its characterized in that, pre-installation tool includes:

The object placing block is provided with an object placing surface, the object placing surface is used for placing a first workpiece, and the end face and the side face of the first workpiece are stuck with a second workpiece;

The first pressing piece is arranged on the object placing block and is used for pressing the end face, on which the second workpiece is attached, of the first workpiece; and

The second pressing piece is arranged on the object placing block and is arranged at intervals with the first pressing piece, and the second pressing piece is used for pressing the side face, on which the second workpiece is attached, of the first workpiece.

2. The preassembly jig of claim 1 wherein the placement block is provided with a first mounting slot, the first press fitting member comprising:

the first pressing rod is rotationally connected to the groove wall of the first mounting groove; and

The first pressing claw is arranged on one side, away from the wall of the first installation groove, of the first pressing rod, so that the end face, attached with the second workpiece, of the first workpiece is pressed together with the rotation of the first pressing rod.

3. The preassembly jig of claim 2 wherein the first press fitting further includes a first handle disposed on a side of the first compression bar facing away from the first compression jaw.

4. The preassembly jig of claim 3 wherein the first press fitting further includes a press head disposed on a side of the first handle facing the first press jaw, the first press fitting being for pressing against one side of the first workpiece end face, the press head being for pressing against the other side of the first workpiece end face.

5. The preassembly jig of claim 2 wherein the placement block is provided with a second mounting slot, the second mounting slot being spaced from the first mounting slot, the second press-fit member comprising:

the second pressing rod is rotationally connected to the groove wall of the second mounting groove; and

The second pressing claw is arranged on one side, away from the wall of the second installation groove, of the second pressing rod, so that the side, provided with the second workpiece, of the first workpiece is pressed together with the rotation of the second pressing rod.

6. The preassembly jig of claim 5 wherein the second press fitting further includes a second handle disposed on a side of the second press bar facing away from the second press jaw.

7. The preassembly jig according to any one of claims 1 to 6, wherein the object placement surface is concavely provided with an object placement groove, the first workpiece is placed in the object placement groove, and at least one side portion of the object placement groove is provided with an opening to expose an end face and a side face of the first workpiece.

8. The preassembly jig of claim 7 further including a baffle disposed on the placement block, the baffle and the first and second press-fit members being spaced apart;

The separation blade stretches into the storage groove and encloses with the cell wall of storage groove and closes and form the backstop groove, the side of first work piece is equipped with spacing arch, the backstop groove is used for right spacing protruding circumference is spacing.

9. The utility model provides a welding jig, its characterized in that, welding jig includes:

A fixing seat;

the rotating assembly is arranged on the fixing seat; and

The preassembly jig of any one of claims 1-8, wherein the placement block is detachably mounted to a rotating end of the rotating assembly to turn over the first workpiece.

10. A laser welding apparatus, characterized in that the laser welding apparatus comprises:

a laser; and

The welding jig of claim 9, the welding jig being disposed on a light exit side of the laser.