CN111331240A

CN111331240A - A frock clamp for friction stir welding

Info

Publication number: CN111331240A
Application number: CN201811548477.8A
Authority: CN
Inventors: 许东升; 梁镇华; 刘杰
Original assignee: Ningbo Jiye Automobile Components Die Casting Co ltd
Current assignee: Ningbo Jiye Automobile Components Die Casting Co ltd
Priority date: 2018-12-18
Filing date: 2018-12-18
Publication date: 2020-06-26

Abstract

The invention relates to a tool clamp for friction stir welding, which comprises a water tank and a welding clamp, wherein the welding clamp is arranged in the water tank and comprises a clamp bottom plate, supporting blocks and pressing devices, the middle part of the upper end of the clamp bottom plate is provided with the supporting blocks matched with the shape of an inner cavity of a product, the upper end of the clamp bottom plate is provided with a plurality of pressing devices around the supporting blocks, each pressing device comprises a hydraulic oil cylinder, a pressing plate and a connecting plate, the upper end of the hydraulic oil cylinder is rotatably provided with the connecting plate at one side of a piston rod, one end of the connecting plate is rotatably connected with the middle part of the pressing plate, one end of the pressing plate is rotatably connected with the piston rod of the. The invention quickly dissipates the large heat of welding by circulating cooling water, greatly reduces the metal heated area of the welding seam accessory, and achieves the purpose of improving deformation.

Description

A frock clamp for friction stir welding

Technical Field

The invention relates to the technical field of friction stir welding tool clamps, in particular to a tool clamp for friction stir welding.

Background

Friction stir welding is a method in which the end portions are brought into a thermoplastic state by heat generated by the movement and mutual friction of the end surfaces of workpieces, and then are rapidly upset-forged to complete welding. The production process has the advantages of safety, no splashing, no smoke and dust, no radiation, little pollution, low cost and the like, and has wide application prospect in the field of new energy automobile manufacturing at present.

Because friction stir welding is in the welding process, the welding bead is narrow, yielding, will guarantee that work piece and soldered connection shaft shoulder are parallel, just need to have sufficient clamp force. In the welding process, after the clamp is used for many times, the formation of the back of a welding seam is influenced due to heating, even normal welding cannot be carried out, in addition, the heat is concentrated in the welding process, the product, particularly a thin-wall part, is easy to deform, and the product assembly failure is easy to cause.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a tool clamp for friction stir welding, which can quickly dissipate the large heat of welding through circulating cooling water, so that the metal heated area of a welding seam accessory is greatly reduced, and the purpose of improving deformation is achieved.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a frock clamp for friction stir welding, includes water tank and welding jig, the water tank in install welding jig, this welding jig includes anchor clamps bottom plate, supporting shoe and closing device, anchor clamps bottom plate upper end middle part be provided with the supporting shoe that matches with product inner chamber shape, a plurality of closing device has been arranged around the supporting shoe to this anchor clamps bottom plate upper end, closing device include hydraulic cylinder, clamp plate and connecting plate, one side that this hydraulic cylinder upper end is located the piston rod rotates installs the connecting plate, connecting plate one end rotate with the clamp plate middle part and be connected, the one end of this clamp plate rotates with hydraulic cylinder's piston rod to be connected, the other end of clamp plate install the cushion.

As a supplement to the technical scheme of the invention, one side of the water tank is respectively provided with a water inlet pipe interface and a water outlet pipe interface.

As a supplement to the technical solution of the present invention, an overflow port is provided at one side of the water tank.

As a supplement to the technical scheme of the invention, the four corners at the upper end of the bottom plate of the clamp are provided with hanging rings. The hoisting ring can be conveniently connected with a crane, and a welding fixture is transferred or the position is changed.

As a supplement to the technical scheme of the invention, L-shaped limiting blocks are respectively arranged at the front and the rear of the supporting block at the upper end of the clamp bottom plate. The position description of the limiting blocks arranged at the front and the rear of the supporting block is carried out on the basis of the use state of the tool clamp.

Has the advantages that: the invention relates to a tool clamp for friction stir welding, which adopts the following steps: 1. rigid fixation method: the welding fixture is used for fixing and supporting, so that the weldment is welded in a non-free state and then released after the welding is finished, and the deformation of the weldment is smaller than that of the weldment in a free state; 2. the forced cooling method can quickly dissipate the large heat of welding by circulating cooling water, so that the metal heated area of the welding seam accessory is greatly reduced, and the purpose of improving deformation is achieved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a welding fixture according to the present invention;

FIG. 3 is a schematic view of the welding fixture of the present invention with the hold-down removed;

fig. 4 is a schematic structural diagram of the pressing device of the present invention.

The figure is as follows: 1. the water tank, 2, welding jig, 3, overflow gap, 4, water inlet pipe interface, 5, water outlet pipe interface, 6, jig bottom plate, 7, rings, 8, top pressing block, 9, supporting block, 10, pressing device, 11, limiting block, 12, hydraulic cylinder, 13, pressing plate, 14, connecting plate, 15 and cushion block.

Detailed Description

The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.

The embodiment of the invention relates to a tool clamp for friction stir welding, and as shown in figures 1-4, the tool clamp for friction stir welding comprises a water tank 1 and a welding clamp 2, wherein the welding clamp 2 is arranged in the water tank 1, the welding fixture 2 comprises a fixture bottom plate 6, a supporting block 9 and a pressing device 10, wherein the supporting block 9 matched with the shape of the inner cavity of a product is arranged in the middle of the upper end of the fixture bottom plate 6, the upper end of the clamp bottom plate 6 is provided with a plurality of pressing devices 10 around the supporting block 9, the pressing devices 10 comprise hydraulic oil cylinders 12, pressing plates 13 and connecting plates 14, a connecting plate 14 is rotatably arranged at one side of the piston rod at the upper end of the hydraulic oil cylinder 12, one end of the connecting plate 14 is rotatably connected with the middle part of a pressing plate 13, one end of the pressure plate 13 is rotatably connected with a piston rod of the hydraulic oil cylinder 12, and the other end of the pressure plate 13 is provided with a cushion block 15.

One side of the water tank 1 is respectively provided with a water inlet pipe connector 4 and a water outlet pipe connector 5. And an overflow opening 3 is arranged on one side of the water tank 1. And hanging rings 7 are arranged at four corners of the upper end of the clamp bottom plate 6. Rings 7 can be conveniently connected with the loop wheel machine, transports welding jig or position change. And L-shaped limiting blocks 11 are arranged at the upper end of the clamp bottom plate 6 in the front and at the back of the supporting block 9.

During the use, welding jig 2 installs in water tank 1, and the product cover is on supporting shoe 9, and preliminary location around stopper 11 through the L type realizes, then puts top briquetting 8 at the product top surface, and the position of top briquetting 8 is close to the welding position of product, and PLC controller through equipment after that controls hydraulic cylinder 12's oil circuit distributor, and hydraulic cylinder 12's piston rod extends, through clamp plate 13, compresses tightly product and top briquetting 8 in proper order. And opening the water inlet pipe connector 4, the water outlet pipe connector 5 and the overflow port 3, introducing cooling water, controlling the water level to just exceed the top surface of the product, and ensuring the cooling water to flow circularly through water inlet and water outlet. And (5) after the preparation work is finished, starting the equipment for welding. In the welding process, the product is the state of compressing tightly, prevents the welding deformation of in-process to weld in aqueous, take away welded heat through recirculated cooling water, reduce thermal expansion deformation. The pressing devices 10 are divided into two parts, one part directly presses the product and the other part indirectly presses the product by pressing the top pressing block 8.

This practicality adopts: 1. rigid fixation method: the support is fixed by using the welding fixture, so that the weldment is welded in a non-free state and then released after the welding is finished, and the deformation of the weldment is smaller than that of the weldment welded in a free state. 2. The forced cooling method can quickly dissipate the large heat of welding by circulating cooling water, so that the metal heated area of the welding seam accessory is greatly reduced, and the purpose of improving deformation is achieved.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a frock clamp for friction stir welding, includes water tank (1) and welding jig (2), its characterized in that: the welding fixture comprises a water tank (1), a welding fixture (2) is installed in the water tank (1), the welding fixture (2) comprises a fixture base plate (6), supporting blocks (9) and pressing devices (10), the supporting blocks (9) matched with the shapes of inner cavities of products are arranged in the middle of the upper end of the fixture base plate (6), the pressing devices (10) are arranged on the upper end of the fixture base plate (6) around the supporting blocks (9), the pressing devices (10) comprise hydraulic oil cylinders (12), pressing plates (13) and connecting plates (14), the connecting plates (14) are installed on one sides, located on piston rods, of the upper ends of the hydraulic oil cylinders (12) in a rotating mode, one ends of the connecting plates (14) are connected with the middle of the pressing plates (13) in a rotating mode, one ends of the pressing plates (13) are connected with the piston rods of.

2. A tooling clamp for friction stir welding according to claim 1, wherein: one side of the water tank (1) is respectively provided with a water inlet pipe connector (4) and a water outlet pipe connector (5).

3. A tooling clamp for friction stir welding according to claim 1, wherein: and an overflow port (3) is arranged on one side of the water tank (1).

4. A tooling clamp for friction stir welding according to claim 1, wherein: and hanging rings (7) are arranged at four corners of the upper end of the clamp bottom plate (6).

5. A tooling clamp for friction stir welding according to claim 1, wherein: and L-shaped limiting blocks (11) are arranged at the upper end of the clamp bottom plate (6) in the front and at the back of the supporting block (9).