Welding fixing device for controlling welding deformation of welding seam of H-shaped steel web

Abstract

The invention discloses a welding fixing device for controlling welding deformation of a welding seam of an H-shaped steel web, which is arranged on a plane base, a plurality of groups of movable positioning devices are arranged on one side of a longitudinal placement fixing position of an H-shaped steel workpiece at intervals, a plurality of groups of fixed positioning devices are arranged on the other side of the longitudinal placement fixing position at intervals, and the positioning devices fix the H-shaped steel workpiece in the transverse direction; a plurality of sets of clamping devices and jacking devices are arranged on the two sides of the H-shaped steel workpiece longitudinal placement fixing position at intervals correspondingly, the clamping devices are provided with clamping blocks used for clamping and fixing the upper flange of the H-shaped steel welding seam side to prevent inward contraction, and the jacking devices are provided with jacking shafts used for jacking and fixing the lower flange of the H-shaped steel to prevent outward expansion. According to the device, appropriate clamping force is set by controlling a clamping cylinder control valve, appropriate jacking force is set by controlling a jacking cylinder control valve, welding deformation of a flange can be accurately controlled, and it is guaranteed that the flange is perpendicular to a web after a workpiece is welded; and the clamping block is in driving connection with the main shaft of the clamping cylinder and is rotationally connected with the main shaft, so that the workpiece is conveniently clamped and hoisted.

Description

Technical Field

[0001] This invention belongs to the field of welding machinery and equipment design technology, specifically relating to a welding fixing device for controlling the welding deformation of the web weld of H-beam steel. Background Technology

[0002] The center beams of various types of flatcars for railway freight cars are made of H-beams. The manufacturing process includes: cutting the web of the H-beam, pressing the web of the H-beam, welding the web seams of the H-beam, and straightening the H-beam.

[0003] In existing welding processes, when submerged arc welding is used for the web welds of H-beams, tie rods are installed on one flange to prevent deformation and reduce welding deformation. However, after welding, the workpiece still exhibits inward deformation (narrower flange width on the weld side) and outward deformation (wider flange width on the tie rod side). To ensure workpiece quality, the current method is to straighten the welded H-beams to ensure the perpendicularity of the web and flanges. Due to the large welding deformation, the straightening efficiency is low, seriously affecting the quality. Summary of the Invention

[0004] This invention discloses a welding fixing device for controlling welding deformation of H-beam web welds. The purpose of this invention is to provide a welding device suitable for welding H-beam web welds, controlling welding deformation, reducing straightening workload, and improving production efficiency.

[0005] This invention is achieved through the following technical solution:

[0006] A welding fixing device for controlling the welding deformation of the web weld of an H-beam, characterized in that: the welding fixing device is set on a flat base, and the H-beam workpiece is placed and fixed on the base longitudinally; multiple sets of movable positioning devices are arranged at intervals on one side of the longitudinal placement and fixing position of the H-beam workpiece, and multiple sets of fixed positioning devices are arranged at intervals on the other side, the movable positioning devices and fixed positioning devices cooperate to fix the H-beam workpiece laterally; multiple sets of clamping devices and tightening devices are arranged at intervals on both sides of the longitudinal placement and fixing position of the H-beam workpiece, the clamping devices are equipped with clamping blocks to clamp and fix the upper flange of the H-beam weld to prevent inward contraction, and the tightening devices are equipped with tightening shafts to tighten and fix the lower flange of the H-beam to prevent outward expansion.

[0007] Furthermore, each set of clamping devices and top clamping devices on both sides of the longitudinal placement and fixing position of the H-beam workpiece are arranged opposite each other along the longitudinal direction of the H-beam workpiece.

[0008] Furthermore, the clamping device consists of a clamping block, a clamping cylinder, and a base plate; the base plate is fixed on the base, the clamping cylinder is set on the base plate, the clamping block is driven and connected to the main shaft of the clamping cylinder, and the clamping block is rotatably connected to the main shaft.

[0009] Furthermore, the clamping device consists of a clamping cylinder and a base plate. The base plate is fixed on the base, and the clamping cylinder is set on the base plate. The clamping cylinder and its clamping shaft are set on the lower flange side of the H-beam workpiece.

[0010] Furthermore, the movable positioning device consists of a movable positioning push block, an ejector cylinder, and a base plate; the base plate is fixed on the base, the ejector cylinder is mounted on the base plate, and the movable positioning push block is driven and connected to the main shaft of the ejector cylinder; the movable positioning push block includes a positioning stop and a support plate, the height of the positioning stop is greater than or equal to the lateral length of the flange of the H-beam workpiece, and the support plate is vertically supported and fixed behind the positioning stop.

[0011] Furthermore, the fixed positioning device is fixedly installed on the base. The fixed positioning device includes a positioning stop and a support plate. The height of the positioning stop is greater than or equal to the lateral length of the flange of the H-beam workpiece, and the support plate is vertically supported and fixed behind the positioning stop.

[0012] Furthermore, the clamping force of the clamping device acting on the H-beam workpiece is set by the control valve of the clamping cylinder; the clamping force of the top clamping device acting on the H-beam workpiece is set by the control valve of the top clamping cylinder.

[0013] Advantages of this invention: The device of this invention can accurately control the welding deformation of the flange by controlling the clamping cylinder control valve to set a suitable clamping force and controlling the top clamping cylinder control valve to set a suitable top clamping force, ensuring that the flange of the workpiece is perpendicular to the web after welding; the clamping block drive is connected to the main shaft of the clamping cylinder and rotates to connect with the main shaft, which facilitates the clamping and hoisting of the workpiece. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the welding and fixing device of the present invention;

[0015] Figure 2 This is a top view schematic diagram of the welding and fixing device of the present invention.

[0016] In the diagram, 1 is the clamping device, 2 is the movable positioning device, 3 is the workpiece, 4 is the fixed positioning device, 5 is the clamping device, 6 is the base, 7 is the clamping block, and 8 is the weld. Detailed Implementation

[0017] The present invention will be further described below with reference to specific embodiments. These specific embodiments are further explanations of the principles of the present invention and are not intended to limit the present invention in any way. Any technology that is the same as or similar to the present invention does not exceed the scope of protection of the present invention.

[0018] Refer to the attached diagram.

[0019] As shown in the figure, the present invention is a welding fixing device for welding deformation of H-beam workpiece 3, and is used for forced welding of web weld 8 of H-beam workpiece 3.

[0020] When welding the web weld 8 of the H-beam workpiece 3, the clamping block 7 clamps the upper flange of the H-beam workpiece 3 through the clamping device 1 to prevent the upper flange from retracting inward; the clamping device 5 clamps the lower flange of the H-beam workpiece 3 to prevent the lower flange from expanding outward. The clamping force and clamping force are set by the control valve; the number and position of the clamping device 1 and the clamping device 5 are set according to the length of the workpiece and the amount of deformation.

[0021] The welding device of the present invention consists of a clamping device 1, a movable positioning device 2, a fixed positioning device 4, a clamping device 5, and a base 6.

[0022] The clamping device 1 consists of a clamping cylinder, a base plate, and a clamping block 7. The clamping cylinder is connected to and fixed on the base plate. The clamping force of the clamping cylinder is set by a control valve. The clamping force acts on the upper flange of the workpiece 3 through the clamping rod spindle. The clamping block 7 is connected to the spindle of the clamping cylinder and can rotate on the spindle. When the workpiece is positioned against the stop, the clamping cylinder spindle extends, the clamping block rotates, and the clamping cylinder spindle retracts, clamping the upper flange of the workpiece 3.

[0023] The movable positioning device 2 consists of a movable positioning push block, an ejector cylinder, and a base plate. The ejector cylinder is connected to and fixed on the base plate, and the movable positioning push block is driven and connected to the spindle of the ejector cylinder. When the workpiece 3 is placed on the base 6, the spindle of the ejector cylinder pushes out, and the movable positioning push block pushes and aligns the workpiece 3.

[0024] The fixed positioning device 4 is fixed on the base 6, and the movable positioning device 6 pushes the workpiece 3 to be positioned on the fixed positioning device 4.

[0025] The clamping device 5 consists of a clamping cylinder and a base plate. The clamping cylinder is connected to and fixed on the base 6. The clamping force of the clamping cylinder is set by a control valve. The clamping force acts on the lower flange of the workpiece 3 through the clamping cylinder spindle.

[0026] When fixing the H-beam workpiece 3, the workpiece 3 is hoisted and placed on the base 6. The main shaft of the ejector cylinder of the movable positioning device 2 extends, and the movable positioning push block pushes the workpiece 3, cooperating with the fixed positioning device 4 to align and fix the workpiece 3. After the workpiece is positioned against the stop, the main shaft of the clamping device clamping cylinder extends, the clamping block rotates, and the main shaft of the clamping cylinder retracts, clamping the upper flange of the workpiece 3. The main shaft of the clamping device clamping cylinder extends, and the clamping force acts on the lower flange of the workpiece 3 through the clamping cylinder main shaft.

Claims

1. A welding fixture for controlling the welding deformation of the web weld of an H-shaped steel, characterized in that: The welding fixture is arranged on a flat base, and the H-shaped steel workpiece is placed and fixed on the base in the longitudinal direction; a plurality of groups of movable positioning devices are arranged at intervals on one side of the longitudinally fixed position of the H-shaped steel workpiece, and a plurality of groups of fixed positioning devices are arranged at intervals on the other side, and the movable positioning devices cooperate with the fixed positioning devices to fix the H-shaped steel workpiece in the transverse direction; a plurality of groups of clamping devices and tightening devices are arranged at intervals on both sides of the longitudinally fixed position of the H-shaped steel workpiece, the clamping device is provided with a clamping block for clamping and fixing the upper flange on the weld side of the H-shaped steel to prevent inward retraction, and the tightening device is provided with a tightening shaft for tightening and fixing the lower flange of the H-shaped steel to prevent outward expansion.

2. The welding fixture for controlling welding deformation of H-beam web weld according to claim 1, characterized in that: Each set of clamping devices and jacking devices on both sides of the longitudinal placement and fixing position of the H-beam workpiece are arranged relatively along the longitudinal direction of the H-beam workpiece.

3. The welding fixture for controlling welding deformation of H-beam web weld according to claim 2, characterized in that: The clamping device consists of a clamping block, a clamping cylinder, and a base plate; the base plate is fixed on the base, the clamping cylinder is arranged on the base plate, the clamping block is drivingly connected to the main shaft of the clamping cylinder, and the clamping block is rotatably connected to the main shaft.

4. The welding fixture for controlling welding deformation of H-beam web weld according to claim 2, characterized in that: The jacking device consists of a jacking cylinder and a base plate, the base plate is fixed on the base, the jacking cylinder is arranged on the base plate, and the jacking cylinder and its jacking shaft are arranged on the lower flange side of the H-shaped steel workpiece.

5. The welding fixture for controlling welding deformation of H-beam web weld according to claim 2, characterized in that: The movable positioning device is composed of a movable positioning push block, an ejection cylinder, and a base plate; the base plate is fixed on the base, the ejection cylinder is arranged on the base plate, and the movable positioning push block is driven and connected to the main shaft of the ejection cylinder; the movable positioning push block includes a positioning stop and a support plate, the height of the positioning stop is greater than or equal to the horizontal length of the wing edge of the H-shaped steel workpiece, and the support plate is vertically supported and fixed at the rear side of the positioning stop.

6. The welding fixture for controlling welding deformation of H-beam web weld according to claim 2, characterized in that: The fixed positioning device is fixedly arranged on the base, and the fixed positioning device includes a positioning block and a support plate. The height of the positioning block is greater than or equal to the horizontal length of the wing edge of the H-shaped steel workpiece, and the support plate is vertically supported and fixed at the rear side of the positioning block.

7. The welding fixture for controlling welding deformation of H-beam web weld according to claim 2, characterized in that: The clamping force of the clamping device on the H-shaped steel workpiece is set by the control valve of the clamping cylinder; the pressing force of the pressing device on the H-shaped steel workpiece is set by the control valve of the pressing cylinder.

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