CN111644746A

CN111644746A - Auxiliary clamping method for cross welding of circular tube

Info

Publication number: CN111644746A
Application number: CN202010510231.2A
Authority: CN
Inventors: 仲晓叶; 高银胜; 施利彪
Original assignee: Jiangsu Tonglian Technology Co ltd
Current assignee: Jiangsu Tonglian Technology Co ltd
Priority date: 2020-06-08
Filing date: 2020-06-08
Publication date: 2020-09-11

Abstract

The invention discloses a cross welding auxiliary clamping method for a circular tube, which comprises the steps of sequentially and axially sleeving a first short tube, a long tube transversely penetrating from a welding position and a second short tube on a guide rod, enabling the first short tube, the long tube and the second short tube to form a cross structure, arranging ejection columns at two ends of the guide rod, fixing the relative positions of the ejection columns and the guide rod, enabling the first short tube and the second short tube to be axially pressed, and clamping and welding the cross structure by a clamping device. The method avoids the deformation of the welding position of the short pipe on the premise of not influencing the clamping efficiency, and greatly improves the welding qualification rate of products.

Description

Auxiliary clamping method for cross welding of circular tube

Technical Field

The invention relates to a welding clamping method, in particular to a cross welding auxiliary clamping method for a circular tube.

Background

As shown in fig. 1, the cross welding of the circular pipes is to connect two short circular pipes on two sides of a long circular pipe, respectively, and in the prior art, when welding is performed by using a laser welding machine, the long circular pipe and the short circular pipe are respectively clamped and aligned by a clamping mechanism and are welded after a short pipe is axially pressed by a cylinder. The high temperature during welding easily causes the head of the short round pipe to deform during welding, and finally two short round pipes are not in a straight line position, so that the high defective rate is caused. Since a sufficient operating space needs to be made available to the laser welding head of the welding machine, it is not possible to add a clamping mechanism to the stub end to control the deformation.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides an auxiliary clamping method for cross welding of a circular tube, which solves the problem that the head of a short circular tube deforms during welding to cause the whole cross shape to deform.

The technical scheme of the invention is as follows: the utility model provides a supplementary clamping method of pipe cross welding, includes that the axial wears to overlap first nozzle stub in proper order on the guide arm, crosses long tube and axial by the welding position and wears to overlap the second nozzle stub, makes first nozzle stub the long tube with the second nozzle stub forms the cruciform structure the guide arm both ends set up the fore-set and fix the fore-set with the relative position of guide arm makes first nozzle stub with second nozzle stub axial pressurized will the cruciform structure is by welding behind the clamping device centre gripping.

Furthermore, the top column is connected to one end of the guide rod before the first short pipe is sleeved.

Further, the guide rod is a threaded rod, and the ejection column is connected with the guide rod in a threaded fit mode.

Furthermore, the ejection column at one end of the guide rod is fixedly connected with the guide rod.

Further, the top pillar is cylindrical, and the diameter of the top pillar is not larger than the diameters of the first short pipe and the second short pipe.

The technical scheme provided by the invention has the advantages that: the guide rods penetrate through the first short pipe and the second short pipe, so that the guide rods are not prone to thermal deformation during laser welding, and the deformation of the first short pipe and the second short pipe is inhibited by the guide rods, so that the qualification rate of products after welding is ensured, and the qualification rate of the products is improved to more than 95% from about 80% originally; the first short pipe and the second short pipe are axially locked through the jacking column, so that an axial cylinder in the original clamping device is omitted, the clamping device is simplified, and energy consumption is reduced; the limiting function of the guide rod enables the first short pipe and the second short pipe to be aligned axially more easily during assembly, manual alignment time is shortened, operation time for locking the ejection column is prolonged, clamping time of a single product is almost unchanged on the whole, clamping efficiency is not affected, and production speed is guaranteed.

Drawings

Fig. 1 is a schematic diagram of a cross welding structure of a circular tube.

Fig. 2 is a schematic structural view of a clamping device in the prior art.

Fig. 3 is a schematic structural view of a cross welding and clamping process of the round pipe in embodiment 1.

Fig. 4 is a schematic view of a cross welding and clamping structure of the round tube in embodiment 2.

Detailed Description

The present invention is further described in the following examples, which are intended to be illustrative only and not to be limiting as to the scope of the invention, which is to be given the full breadth of the appended claims and any and all equivalent modifications thereof which would occur to persons skilled in the art upon reading the present specification and which are intended to be within the scope of the present invention as defined in the appended claims.

Referring to fig. 1 and 2, a clamping device in the prior art includes three positioning blocks with grooves having a fast clamping structure, i.e., a first positioning block with grooves 1, a second positioning block with grooves 2, and a third positioning block with grooves 3, wherein a long pipe 4 is transversely placed in a positioning groove 1a of the first positioning block with grooves 1 and clamped by a fast clamping structure 7, and then a first short pipe 5 and a second short pipe 6 are respectively placed in

positioning grooves

2a,3a of the second positioning block with grooves 2 and the third positioning block with grooves 3 and clamped by the fast clamping structure 7. Then the upper and lower lateral cylinders (not shown) of the second and third slotted

positioning blocks

2 and 3 push the head ends of the first and second

short pipes

5 and 6 against the two sides of the long pipe 4 for welding. Because the action space needs to be reserved for the welding head, the heads of the first short pipe 5 and the second short pipe 6 cannot be clamped, and the heads deform due to high temperature in the welding process to generate unqualified products

In embodiment 1, please refer to fig. 3 for the cross welding auxiliary clamping method for circular tubes in this embodiment, an auxiliary tool is adopted and includes a screw 8 and a cylindrical nut 9, the screw 8 is used as a guide rod, and a first short tube 5, a long tube 4 and a second short tube 6 are sequentially and axially sleeved on the screw 8 in a penetrating manner from a welding position to form a cross structure by the first short tube 5, the long tube 4 and the second short tube 6. And the cylindrical nut 9 is used as a top column, and the cylindrical nut 9 is screwed on two ends of the threaded rod 8 which is sleeved and fastened respectively to enable the first short pipe 5 and the second short pipe 6 to be axially pressed to complete assembly. Put into each locating piece clamping with the cruciform structure after the equipment like prior art, the upper and lower side direction of second trough of belt locating piece 2 and third trough of belt locating piece 3 no longer needs the cylinder, and the clamping finishes and to weld, and the cruciform structure that the welding was accomplished takes off the back from the locating piece, unscrews cylindrical nut 9, extracts screw rod 8 and carries out the equipment of next product.

Embodiment 2, please refer to fig. 4 for the auxiliary clamping method for cross welding of circular tubes in this embodiment, the auxiliary tool includes a guide rod 10 and a cylindrical nut 11 with a rod, the rod body of the guide rod 10 is a smooth circular rod, the head of the guide rod 10 is provided with a thread, the tail end of the guide rod 10 is a cylindrical section with a diameter larger than that of the rod body of the guide rod 10 but not larger than the diameters of the first short tube 5 and the second short tube 6, the first short tube 5 is sequentially axially sleeved on the guide rod 10, the long tube 4 is transversely penetrated from the welding position, and the second short tube 6 is axially sleeved, so that the first short tube 5, the long tube 4, and the second short tube 6 form a cross structure. And the cylindrical nut 11 with the rod is used as a top column, the cylindrical nut 11 with the rod is screwed on the head end of the guide rod 10 which is sleeved, and the first short pipe 5 and the second short pipe 6 are fastened to be axially pressed, so that the assembly is completed. Put into each locating piece clamping with the cruciform structure after the equipment like prior art, the upper and lower side direction of second trough of belt locating piece 2 and third trough of belt locating piece 3 no longer needs the cylinder, and the clamping finishes and to weld, and the cruciform structure that the welding was accomplished takes off the back from the locating piece, unscrews band pole cylinder nut 11, extracts screw rod 10 and carries out the equipment of next product.

Claims

1. The utility model provides a pipe cross welding assists clamping method which characterized in that includes that the axial wears to overlap first nozzle stub in proper order on the guide arm, crosses long tube and axial by the welding position and wears to overlap the second nozzle stub, makes first nozzle stub the long tube with the second nozzle stub forms the cruciform structure the guide arm both ends set up the fore-set and fix the fore-set with the relative position of guide arm makes first nozzle stub with the axial pressurized of second nozzle stub will the cruciform structure is by welding behind the clamping device centre gripping.

2. The auxiliary clamping method for the cross welding of the circular tube as claimed in claim 1, wherein the top post is connected to one end of the guide rod before the first short tube is sleeved.

3. The auxiliary clamping method for the cross welding of the circular tube according to claim 1, wherein the guide rod is a threaded rod, and the ejection column is connected with the guide rod in a threaded fit manner.

4. The auxiliary clamping method for the cross welding of the circular tube according to claim 1, wherein a top column at one end of the guide rod is fixedly connected with the guide rod.

5. The round tube cross-welding auxiliary clamping method as recited in claim 1, wherein the top pillar is cylindrical, and the diameter of the top pillar is not larger than the diameters of the first short tube and the second short tube.