Welding equipment and clamping mechanism thereof

Abstract

The utility model belongs to the technical field of laser welding, and provides welding equipment and a clamping mechanism thereof, the clamping mechanism comprises a clamping block, a base, a cover plate and a positioning assembly, a small part is inserted into the clamping block, the base is provided with a containing groove and a protrusion, the small part extends to the containing groove from the clamping block, and a large part is installed on the protrusion and covers the small part; the cover plate is provided with concave holes matched with the protrusions, and the cover plate is used for pressing the large parts to the small parts. The positioning assembly comprises a moving plate, an X-axis positioning module and a Y-axis positioning module, the moving plate is in sliding fit with the base, and the moving plate drives the X-axis positioning module and the Y-axis positioning module to move towards the containing groove at the same time to position the small parts or move away from the containing groove to relieve positioning of the small parts. The laser welding device has the advantages that the clamping accuracy of small parts is improved, so that the laser welding process yield is increased, meanwhile, the material clamping time of operators is shortened, and the production labor cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser welding, and more particularly to a welding device and a clamping mechanism thereof. BACKGROUND

[0002] In the current field of manufacturing small electronic components and precision parts, welding is a key process. Since small workpieces are small in size and light in weight, it is often difficult to ensure precision and stability when directly welding small workpieces to large workpieces by hand. In the current automated welding process, a special jig is used for assistance, and a small workpiece is accommodated in a hole on the jig to align a large workpiece on the base for stable welding.

[0003] Since the small workpiece is clamped by the gap between the hole positions of the jig bottom plate, the small workpiece at the welding position may have unstable size, insufficient force, and low gap fitting degree of the jig hole position design during the installation process, resulting in unstable welding effect, low work efficiency, and low product yield. For example, it is difficult for an operator to accurately control the clamping accuracy of the small workpiece, which may cause misalignment or deformation of the workpiece during welding, resulting in uneven welding quality. The traditional welding device often relies on manual intervention, and its flexibility and precision are limited, which cannot meet the needs of the rapid development of precision manufacturing. CONTENT OF THE INVENTION

[0004] The embodiment of the present application provides a welding device and a clamping mechanism thereof, which can effectively improve the clamping accuracy of small workpieces, thereby improving the yield of laser welding process, reducing the material clamping working hours of operators, and reducing the production labor cost.

[0005] In a first aspect, the present application provides a clamping mechanism, which adopts the following technical solution:

[0006] A clamping mechanism comprises:

[0007] A clamping mechanism comprises:

[0008] A base provided with an accommodating groove and a protrusion, the small workpiece extends from the clamping block to the accommodating groove, and the large workpiece is installed on the protrusion and covers the small workpiece;

[0009] A cover plate having a recess hole matched with the protrusion, the cover plate is used to press the large workpiece against the small workpiece;

[0010] A positioning assembly comprising a moving plate, an X-axis positioning module, and a Y-axis positioning module, the moving plate is in sliding cooperation with the base, the moving plate drives the X-axis positioning module and the Y-axis positioning module to move towards the accommodating groove to position the small workpiece, or to move away from the accommodating groove to release the positioning of the small workpiece.

[0011] Optionally, the positioning assembly further comprises a switch module arranged on the base, and the moving plate is provided with a mounting hole; the switch module comprises a rotating switch and an eccentric wheel, the eccentric wheel is rotationally connected with the base, and the eccentric wheel has an eccentric rotating rod, an end surface of the eccentric wheel away from the eccentric rotating rod is fixedly connected with the rotating switch, and the rotating rod is rotationally connected with the moving plate through the mounting hole to drive the moving plate to reciprocate.

[0012] Optionally, the X-axis positioning module comprises a first push block and a first limiting column, one end of the first limiting column is fixedly connected with the first push block, and the other end is located in the first limiting slot and moves synchronously with the moving plate to drive the first push block to slide along the X-axis and be connected with the base.

[0013] Optionally, the Y-axis positioning module comprises a second push block and a second limiting column, the second push block is slidably connected with the base along the Y-axis; the moving plate is provided with a second limiting slot, one end of the second limiting column is fixedly connected with the first push block, and the other end is located in the second limiting slot;

[0014] The second limiting slot is provided with a first guide inclined surface and a second guide inclined surface, the second limiting column moves along the first guide inclined surface to drive the second push block to move close to the accommodating groove, and the second limiting column moves along the second guide inclined surface to drive the second push block to move away from the accommodating groove.

[0015] Optionally, the positioning assembly further comprises a first buffer spring and a second buffer spring;

[0016] The base is provided with a first sliding slot and a second sliding slot, the first push block and the first buffer spring are located in the first sliding slot, one end of the first buffer spring is abutted against the first push block, and the other end is abutted against the inner wall of the first sliding slot away from the small object; the second push block and the second buffer spring are located in the second sliding slot, one end of the second buffer spring is abutted against the second push block, and the other end is abutted against the inner wall of the second sliding slot away from the small object.

[0017] Optionally, a plurality of pressing assemblies are further included, the pressing assemblies are mounted on the base to lock and press the cover plate and the base.

[0018] Optionally, the pressing assembly comprises a first connecting rod and a second connecting rod, the first connecting rod is fixedly arranged on the base, and the second connecting rod is hingedly connected with the first connecting rod.

[0019] The second connecting rod is provided with a cam part, the cam part is provided with a locking area and an unlocking area, when the second connecting rod rotates the cam part to the locking area, the cam part contacts and presses against the cover plate, so that the cover plate is tightly pressed against the base; when the second connecting rod rotates the cam part to the unlocking area, there is a gap between the cam part and the cover plate, so that the cover plate is released from the pressing against the base.

[0020] Optionally, the cover plate is provided with a circular arc surface corresponding to the area of the cam part, the circular arc surface is adapted to the outer peripheral shape of the cam part, and when the cam part is rotated to the locking area, the locking area is fitted and pressed against the circular arc surface.

[0021] Optionally, a pressing plate is further arranged between the cover plate and the base, the pressing plate is provided with a first buffer and a positioning groove, one end of the first buffer is located in the positioning groove and presses against the pressing plate, and the other end contacts and presses against the cover plate.

[0022] The cover plate is provided with a pressing module and a first avoiding groove, the pressing plate is provided with a second avoiding groove, and the first avoiding groove and the second avoiding groove are arranged in position.

[0023] The pressing module comprises a fixed block, a pressing block and a second buffer, the fixed block is fixedly connected with the cover plate, one end of the second buffer presses against the fixed block, and the other end presses against the pressing block, and the pressing block passes through the first avoiding groove and the second avoiding groove to press against the large piece.

[0024] In a second aspect, the application provides a welding device, which adopts the following technical scheme:

[0025] A welding device comprises a laser light source and the clamping mechanism, and the laser light source is used for welding the small piece to the large piece.

[0026] From the above technical scheme, it can be seen that the embodiments of the application have the following advantages:

[0027] The operator assembles the small piece to the clamping block of the containing groove of the base, controls the moving plate, drives the X-axis positioning module and the Y-axis positioning module to move towards the containing groove, limits the movement of the small piece in the X-axis and Y-axis directions, accurately limits the small piece, effectively improves the clamping accuracy of the small piece, improves the yield of the laser welding process, reduces the working hours of the operator for material clamping, and reduces the production labor cost; after the welding is completed, the moving plate drives the X-axis positioning module and the Y-axis positioning module to move away from the containing groove, so as to release the positioning of the small piece in the X-axis and Y-axis directions, facilitating the taking out of the welded product. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description only represent some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0029] Figure 1 The overall structure schematic diagram of a clamping mechanism disclosed by the embodiments of the present application;

[0030] Figure 2 The structure schematic diagram of a clamping mechanism highlighting the base and the pressing assembly disclosed by the embodiments of the present application;

[0031] Figure 3 The structure schematic diagram of a clamping mechanism highlighting the positioning assembly disclosed by the embodiments of the present application;

[0032] Figure 4 The structure schematic diagram of a clamping mechanism highlighting the X-axis positioning module and the Y-axis positioning module disclosed by the embodiments of the present application;

[0033] Figure 5 The structure sectional view of a clamping mechanism highlighting the X-axis positioning module disclosed by the embodiments of the present application;

[0034] Figure 6 The structure sectional view of a clamping mechanism highlighting the Y-axis positioning module disclosed by the embodiments of the present application;

[0035] Figure 7 The structure schematic diagram of a clamping mechanism highlighting the moving plate and the base from another perspective disclosed by the embodiments of the present application;

[0036] Figure 8(a) is the structure schematic diagram of a clamping mechanism highlighting the pressing cover plate and the base of the pressing assembly disclosed by the embodiments of the present application;

[0037] Figure 8(b) is the structure schematic diagram of a clamping mechanism highlighting the structure of the pressing assembly releasing the pressing of the cover plate and the base disclosed by the embodiments of the present application;

[0038] Figure 9 The structure schematic diagram of a clamping mechanism highlighting the pressing module disclosed by the embodiments of the present application.

[0039] Explanation of reference signs:

[0040] 1, base; 11, accommodating groove; 12, clamping block; 13, first sliding groove; 14, second sliding groove; 15, protrusion;

[0041] 2, positioning assembly; 21, moving plate; 211, mounting hole; 212, first limiting groove; 213, second limiting groove; 2131, first guide inclined surface; 2132, second guide inclined surface; 22, X-axis positioning module; 221, first push block; 222, first limiting column; 23, Y-axis positioning module; 231, second push block; 232, second limiting column; 24, switch module; 241, rotating switch; 242, eccentric wheel; 243, eccentric rotating rod; 25, first buffer spring; 26, second buffer spring;

[0042] 3, cover plate; 31, circular arc surface; 32, pressing module; 321, fixed block; 322, pressing block; 323, second buffer; 324, groove; 33, first avoiding groove; 34, recess;

[0043] 4, pressing assembly; 41, first connecting rod; 42, second connecting rod; 421, cam portion; 43, rotating shaft; 44, connecting rod;

[0044] 5, pressing plate; 51, first buffer; 52, positioning groove; 53, second avoiding groove. DETAILED DESCRIPTION

[0045] The application will be further described below in conjunction with the accompanying drawings.

[0046] The application provides a welding device and a clamping mechanism thereof.

[0047] In order for those skilled in the art to better understand the application, the technical solutions in the embodiments of the application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work should fall within the protection scope of the application. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can realize it. When the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope of the application.

[0048] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0049] Please see Figure 1 and Figure 2 This is one embodiment of the clamping mechanism in this application. The clamping mechanism is applied to a welding equipment, which has a laser light source for welding small parts of the clamping mechanism to large parts.

[0050] The clamping mechanism includes a base 1, a positioning component 2, a cover plate 3, and a pressing component 4. The base 1 is used to mount small parts. The base 1 has a protrusion 15, and a large part is fitted onto the protrusion 15 and covers the small part. The positioning component 2 is used to position the small part in the X and Y axes. The cover plate 3 has a recess 34 that matches the protrusion 15, used to press the large part tightly onto the small part. The pressing component 4 is installed on one side of the base 1 and is used to press the cover plate 3 onto and lock the base 1.

[0051] The base 1 can be generally rectangular in shape and has a receiving groove 11. A locking block 12 is installed in the receiving groove 11. Small parts are inserted into the locking block 12 and extend into the receiving groove 11. The upper end face of the locking block 12 is flush with the upper end face of the base 1. In this embodiment, multiple locking blocks 12 and receiving grooves 11 are provided, and each locking block 12 and receiving groove 11 is arranged in a one-to-one correspondence to hold multiple small parts, so that multiple small parts can be welded to the large part simultaneously, shortening the welding time and thus improving the welding efficiency.

[0052] After clamping, the clamping mechanism is flipped so that the laser light source enters the receiving groove 11 from the back of the base 1 to weld the small part to the large part.

[0053] Please see Figure 2 and Figure 3, the positioning assembly 2 is provided corresponding to the accommodating groove 11, and in this embodiment, the positioning assembly 2 is provided with a plurality of positioning assemblies for simultaneously positioning a plurality of small parts. The X-axis direction is along the length direction of the base, and the Y-axis direction is along the width direction of the base. The positioning assembly 2 comprises a moving plate 21, an X-axis positioning module 22 and a Y-axis positioning module 23. The moving plate 21 is located below the base 1 and is in sliding fit with the base 1 along the X-axis direction. The X-axis positioning module 22 and the Y-axis positioning module 23 are arranged around the accommodating groove 11. The moving plate 21 drives the X-axis positioning module 22 and the Y-axis positioning module 23 to move towards the accommodating groove 11 to position the small parts or to move away from the accommodating groove 11 to release the positioning of the small parts. It can be understood that the operator assembles the small parts into the accommodating groove 11 of the base 1 and fixes the small parts by the clamping block 12. By controlling the moving plate 21, the moving plate 21 drives the X-axis positioning module 22 and the Y-axis positioning module 23 to move towards the accommodating groove 11 to limit the movement of the small parts in the X-axis and Y-axis directions, thereby accurately positioning the small parts and effectively improving the clamping accuracy of the small parts, thereby improving the yield of the laser welding process, reducing the working hours of the operator for material clamping and reducing the production labor cost. When the welding is completed, the moving plate 21 drives the X-axis positioning module 22 and the Y-axis positioning module 23 to move away from the accommodating groove 11 to contact the small parts in the X-axis and Y-axis directions, thereby facilitating the removal of the welded product.

[0054] Specifically, please refer to Figures 3 to 5 The X-axis positioning module 22 comprises a first push block 221 and a first limiting column 222. The first push block 221 moves along the X-axis and is in sliding connection with the base 1. The first limiting column 222 is vertically arranged and is perpendicular to the base 1. The moving plate 21 is provided with a first limiting groove 212 at the position of the first push block 221. One end of the first limiting column 222 is fixedly connected with the first push block 221, and the other end is located in the first limiting groove 212 and moves synchronously with the moving plate 21 to drive the first push block 221 to slide along the X-axis with the base 1. It can be understood that in this embodiment, the moving plate 21 is controlled to move towards the left, the first limiting column 222 is in contact with and pressed against the groove wall of the first limiting groove 212, thereby driving the first limiting column 222 to move towards the left synchronously with the moving plate 21, and then the first limiting column 222 drives the first push block 221 to move towards the left, thereby making the first push block 221 slide away from the accommodating groove 11 with the base 1, and the end of the first push block 221 close to the small part releases the positioning of the small part. The moving plate 21 is controlled to move towards the right, the first limiting column 222 is in contact with and pressed against the groove wall of the first limiting groove 212, thereby driving the first limiting column 222 to move towards the right synchronously with the moving plate 21, and then the first limiting column 222 drives the first push block 221 to move towards the right, thereby making the first push block 221 slide towards the accommodating groove 11 with the base 1, and the end of the first push block 221 close to the small part realizes the positioning of the small part in the X-axis direction.

[0055] Referring to Figure 4 and Figure 6 The Y-axis positioning module 23 comprises a second push block 231 and a second limiting column 232. The second push block 231 is located above the moving plate 21 and is in sliding connection with the base 1 along the Y-axis direction. The second limiting column 232 is vertically arranged and is perpendicular to the base 1. The moving plate 21 is provided with a second limiting groove 213 at the position of the second push block 231. One end of the second limiting column 232 is fixedly connected with the first push block 221, and the other end is located in the second limiting groove 213. The second limiting groove 213 is provided with a first guide inclined surface 2131 and a second guide inclined surface 2132. The second limiting column 232 moves along the first guide inclined surface 2131 to make the second push block 231 move along the Y-axis direction to approach the accommodating groove 11. The second limiting column 232 moves along the second guide inclined surface 2132 to make the second push block 231 move along the Y-axis direction to move away from the accommodating groove 11. It can be understood that in the embodiment, when the moving plate 21 is controlled to move to the left, the second guide inclined surface 2132 of the second limiting groove 213 is in contact with and abuts against the second limiting column 232 to drive the second limiting column 232 to move upward, so that the second limiting column 232 drives the second push block 231 to synchronously move upward, so that the second push block 231 and the base 1 slide to move away from the accommodating groove 11 along the Y-axis direction, and the end of the second push block 231 close to the small object releases the positioning of the small object. When the moving plate 21 is controlled to move to the right, the first guide inclined surface 2131 of the second limiting groove 213 is in contact with and abuts against the second limiting column 232 to drive the second limiting column 232 to move downward, so that the second limiting column 232 drives the second push block 231 to synchronously move downward, so that the second push block 231 and the base 1 slide to move along the Y-axis direction to approach the accommodating groove 11, and the end of the second push block 231 close to the small object realizes the positioning of the small object in the Y-axis direction. Through the cooperation between the first limiting column 222 and the first limiting hole and the cooperation between the second limiting column 232 and the second limiting hole, the multi-direction conversion of the positioning assembly 2 is realized.

[0056] Referring to Figures 4 to 7, in order to prevent the first push block 221 and the second push block 231 from pressing the small piece during the movement of the moving plate 21 along the x-axis, the positioning assembly 2 further comprises a first buffer spring 25 and a second buffer spring 26, the length of the first buffer spring 25 is arranged along the x-axis, and the length of the second buffer spring 26 is arranged along the y-axis. The end surface of the base 1 facing the moving plate 21 is provided with a first sliding groove 13 and a second sliding groove 14, the first push block 221 and the first buffer spring 25 are located in the first sliding groove 13, one end of the first buffer spring 25 abuts against the first push block 221, and the other end abuts against the inner wall of the first sliding groove 13 away from the small piece; the second push block 231 and the second buffer spring 26 are located in the second sliding groove 14, one end of the second buffer spring 26 abuts against the second push block 231, and the other end abuts against the inner wall of the second sliding groove 14 away from the small piece. When the moving block moves towards the right, the moving block drives the first limiting column 222 and the first push block 221 to move towards the accommodating groove 11, and at the same time, the moving block drives the second limiting column 232 to move along the first guide inclined surface 2131, when the first push block 221 moves to contact and abut against the small piece, the first buffer spring 25 reserves a movement space for the first push block 221, which is used to buffer the pressure of the first push block 221 on the small piece, so as to avoid that the first push block 221 presses the small piece; when the second push block 231 moves to contact and abut against the small piece, the second buffer spring 26 reserves a movement space for the second push block 231, which is used to buffer the pressure of the second push block 231 on the small piece, so as to avoid that the second push block 231 presses the small piece.

[0057] In actual application, the spring force and size of the first buffer spring 25 and the second buffer spring 26 can be selected, and appropriate spring force and size are selected according to the volume of the small piece, so as to prevent excessive abutment pressure on the small piece and ensure the yield of the small piece, thereby further improving the yield of the laser welding process.

[0058] Please refer to Figure 3 and Figure 7In order to facilitate the operation of the moving plate 21, the positioning assembly 2 further comprises a switch module 24 arranged on the base 1, which is used to control the reciprocating sliding of the moving plate 21. The switch module 24 is controlled to control the movement of the moving plate 21 along the X-axis direction. Specifically, the switch module 24 comprises a rotating switch 241 and an eccentric wheel 242, the eccentric wheel 242 is rotatably connected with the base 1, and the eccentric wheel 242 has an eccentric rotating rod 243, which is vertically arranged, and the eccentric rotating rod 243 has a center axis which is not equal to the radius of the eccentric wheel 242. The end surface of the eccentric rotating rod 243 away from the eccentric wheel 242 is fixedly connected with the rotating switch 241, and the rotating switch 241 is operated to synchronously control the rotation of the eccentric wheel 242. The moving plate 21 is provided with a mounting hole 211, and the rotating rod is arranged in the mounting hole 211 and rotatably connected with the moving plate 21 to drive the reciprocating movement of the moving plate 21. It can be understood that the rotating switch 241 is operated to synchronously rotate the eccentric wheel 242 and the eccentric rotating rod 243, and the eccentric wheel 242 is relied on the change of the radius of rotation to drive the sliding movement between the moving plate 21 and the base 1, so as to realize the movement of the X-axis positioning module 22 and the Y-axis positioning module 23 driven by the moving plate 21, and realize the precise clamping and loosening of small parts.

[0059] Please refer to Figure 2 and Fig. 8, the pressing assembly 4 is arranged in multiple numbers to press the base 1 and the cover plate 3 at multiple positions. In the embodiment, the pressing assembly 4 is arranged in four numbers, which are respectively arranged at the four corners of the clamping mechanism to press the two end portions of the base 1 and the cover plate 3 along the length direction. The pressing assembly 4 comprises a first connecting rod 41, a second connecting rod 42 and a rotating shaft 43, the first connecting rod 41 is vertically arranged and fixedly connected with the base 1, the rotating shaft 43 is horizontally arranged and penetrates the end portions of the first connecting rod 41 and the second connecting rod 42, and the second connecting rod 42 is hingedly connected with the first connecting rod 41 through the rotating shaft 43. The second connecting rod 42 is provided with a cam portion 421, the cam portion 421 is an arc, the cam portion 421 is provided with a locking area and an unlocking area, the locking area is the maximum straight line distance from the center axis of the rotating shaft 43 to the circumferential wall of the cam portion 421, and the unlocking area is located on one side of the locking area. When the cam portion 421 of the second connecting rod 42 is rotated to the locking area, the cam portion 421 is in contact with and presses the cover plate 3, so that the cover plate 3 is tightly pressed with the base 1; when the cam portion 421 of the second connecting rod 42 is rotated to the unlocking area, there is a gap between the cam portion 421 and the cover plate 3, so that the cover plate 3 is released from the pressing with the base 1. Through the rotating action of the second connecting rod 42, the radius of rotation of the cam portion 421 is changed to realize the locking or unlocking effect of the cover plate 3 and the base 1.

[0060] In order to facilitate the synchronous control of the second connecting rods 42 in the multiple pressing assemblies 4 on the same side, simplify the operation steps of pressing the base 1 and the cover plate 3, and improve the welding efficiency, the linkage rods 44 are arranged between the second connecting rods 42 on the same side of the clamping mechanism, and the multiple second connecting rods 42 on the same side of the clamping mechanism can be synchronously controlled by operating the linkage rods 44, so that the pressing or unlocking of the base 1 and the cover plate 3 can be realized in one step.

[0061] Please refer to FIG. 8, further, the area of the cover plate 3 corresponding to the cam portion 421 is provided with a circular arc surface 31, the circular arc surface 31 is adapted to the outer peripheral shape of the cam portion 421, when the cam portion 421 is rotated to the locking area, the locking area is in contact with and pressed against the circular arc surface 31. It can be understood that, by cooperating when the cam portion 421 is rotated to the locking area, and completely in contact with the circular arc surface 31, the shape of the circular arc surface 31 will keep the cam portion 421 in this position, prevent loosening, increase the difficulty of misoperation, realize the self-locking function, improve the safety; secondly, since the cam portion 421 and the cover plate 3 are in arc surface contact, the user can easily control the pressing between the base 1 and the cover plate 3 by rotating in or out, simplify the operation process, at the same time, compared with point contact, this design can reduce mechanical impact and wear, prolong the service life of the assembly.

[0062] Please refer to Figure 1 and Figure 9 , in order to realize the positioning of the large piece between the base 1 and the cover plate 3, avoid the displacement of the large piece, and improve the yield of laser welding process. The clamping mechanism further comprises a pressing plate 5 arranged between the cover plate 3 and the base 1, the pressing plate 5 is located above the large piece for positioning and pressing the large piece. The pressing plate 5 is provided with a first buffer 51 and a positioning groove 52, the first buffer 51 is vertically arranged, one end of the first buffer 51 is located in the positioning groove 52 and is pressed against the pressing plate 5, and the other end is in contact with and pressed against the cover plate 3. When the cover plate 3 is pressed against the base 1, the cover plate 3 presses against the pressing plate 5 and the first buffer 51, the first buffer 51 is used for buffering the force of the cover plate 3 on the pressing plate 5, preventing excessive pressing on the large piece, and ensuring the yield of the large piece.

[0063] Further, the cover plate 3 is provided with a pressing module 32 for pressing the coincident part of the large and small pieces, and a first avoiding slot 33. The pressing plate 5 is provided with a second avoiding slot 53. The first avoiding slot 33 and the second avoiding slot 53 are arranged in position, and the first avoiding slot 33 and the second avoiding slot 53 are above the small piece. The pressing module 32 comprises a fixed block 321, a pressing block 322, and a second buffer 323. The fixed block 321 is fixedly connected with the cover plate 3. The second buffer 323 is vertically arranged. One end of the second buffer 323 is abutted against the fixed block 321, and the other end is abutted against the pressing block 322. The pressing block 322 penetrates the first avoiding slot 33 and the second avoiding slot 53 to press the large piece. In the embodiment, the first buffer 51 and the second buffer 323 are preferably springs. The pressing block 322 is vertically provided with a groove 324. The end of the second buffer 323 away from the fixed block 321 is located in the groove 324 to limit the compression direction of the second buffer 323. It can be understood that when the cover plate 3 is pressed on the base 1, the fixed block 321 drives the pressing block 322 to move under the action of the second buffer spring 26. The pressing block 322 penetrates the first avoiding slot 33 and the second avoiding slot 53 to press and position the coincident part of the large and small pieces, thereby further improving the yield of the laser welding process.

[0064] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A clamping mechanism, characterized in that, include: A card block, with a small component inserted into it; The base is provided with a receiving groove and a protrusion. The small part extends from the locking block to the receiving groove, and the large part is installed on the protrusion and covers the small part. A cover plate having recesses that match the protrusions, the cover plate being used to press the larger component against the smaller component; The positioning component includes a movable plate, an X-axis positioning module, and a Y-axis positioning module. The movable plate slides in conjunction with the base. The movable plate drives the X-axis positioning module and the Y-axis positioning module to move simultaneously toward the receiving groove to position the small part, or to move away from the receiving groove to release the positioning of the small part.

2. The clamping mechanism according to claim 1, characterized in that, The positioning component further includes a switch module disposed on the base, and the movable plate is provided with mounting holes; the switch module includes a rotary switch and an eccentric wheel, the eccentric wheel is rotatably engaged with the base, and the eccentric wheel has an eccentric rotating rod, the end face of the eccentric wheel away from the eccentric rotating rod is fixedly connected to the rotary switch, and the rotating rod passes through the mounting hole and is rotatably engaged with the movable plate to drive the movable plate to reciprocate.

3. The clamping mechanism according to claim 1, characterized in that, The X-axis positioning module includes a first push block and a first limiting post. The moving plate is provided with a first limiting groove at the position of the first push block. One end of the first limiting post is fixedly connected to the first push block, and the other end is located in the first limiting groove and moves synchronously with the moving plate to drive the first push block to slide and connect with the base along the X-axis.

4. The clamping mechanism according to claim 3, characterized in that, The Y-axis positioning module includes a second push block and a second limiting post. The second push block is slidably connected to the base along the Y-axis. The movable plate is provided with a second limiting groove. One end of the second limiting post is fixedly connected to the first push block, and the other end is located in the second limiting groove. The second limiting groove is provided with a first guide slope and a second guide slope. The second limiting post moves along the first guide slope to make the second push block move closer to the receiving groove, and the second limiting post moves along the second guide slope to make the second push block move away from the receiving groove.

5. A clamping mechanism according to claim 4, characterized in that, The positioning component also includes a first buffer spring and a second buffer spring. The base is provided with a first sliding groove and a second sliding groove. The first push block and the first buffer spring are located in the first sliding groove. One end of the first buffer spring abuts against the first push block, and the other end abuts against the inner wall of the first sliding groove away from the small part. The second push block and the second buffer spring are located in the second sliding groove. One end of the second buffer spring abuts against the second push block, and the other end abuts against the inner wall of the second sliding groove away from the small part.

6. The clamping mechanism according to claim 1, characterized in that, It also includes multiple pressing components, which are mounted on the base for locking and pressing the cover plate and the base together.

7. A clamping mechanism according to claim 6, characterized in that, The pressing assembly includes a first connecting rod and a second connecting rod, wherein the first connecting rod is fixedly disposed on the base and the second connecting rod is hinged to the first connecting rod; The second connecting rod is provided with a cam portion, which has a locking area and an unlocking area. When the second connecting rod rotates the cam portion to the locking area, the cam portion contacts and presses against the cover plate to make the cover plate tightly pressed against the base. When the second connecting rod rotates the cam portion to the unlocking area, there is a gap between the cam portion and the cover plate to release the cover plate from the base.

8. A clamping mechanism according to claim 7, characterized in that, The cover plate has an arc surface corresponding to the area of ​​the cam portion. The arc surface is adapted to the outer circumferential shape of the cam portion. When the cam portion is rotated to the locking area, the locking area fits and presses against the arc surface.

9. A clamping mechanism according to claim 6, characterized in that, It also includes a pressure plate disposed between the cover plate and the base. The pressure plate is provided with a first buffer and a positioning groove. One end of the first buffer is located in the positioning groove and presses against the pressure plate, and the other end contacts and presses against the cover plate. The cover plate is provided with a pressing module and a first clearance groove, and the pressing plate is provided with a second clearance groove. The first clearance groove and the second clearance groove are aligned. The pressing module includes a fixed block, a pressing block, and a second buffer. The fixed block is fixedly connected to the cover plate. One end of the second buffer presses against the fixed block, and the other end presses against the pressing block. The pressing block passes through both the first clearance groove and the second clearance groove to press against the large component.

10. A welding device, characterized in that, It includes a laser source and a clamping mechanism as described in any one of claims 1 to 9, wherein the laser source is used to weld the small part to the large part.

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