A mechanical engineering workpiece welding device

Abstract

The present invention relates to the technical field of workpiece welding devices, and specifically discloses a mechanical engineering workpiece welding device, comprising a welding base; a clamping claw driving seat; a clamping mechanism; a pipe abutment; a welding frame; a welding head; a guide mechanism, wherein the guide mechanism is located on the surface of the welding frame; and a segmentation mechanism, wherein the segmentation mechanism is connected to the guide mechanism. The mechanical engineering workpiece welding device can connect a steel pipe main pipe to be welded with a branch pipe through the clamping mechanism and the pipe abutment. When the clamping mechanism fixes the steel pipe main pipe, the wall thickness of the steel pipe main pipe can be detected, thereby adjusting the output power of the welding head according to the wall thickness of the main pipe. The guide mechanism adjusts the angle between the welding head and the saddle mouth according to the vertical displacement of the guide contact. When the guide contact moves in the vertical direction, the segmentation mechanism divides the weld into several small sections, and performs interval welding on each section, so that the welding stress is evenly distributed, stress concentration is avoided, and the contraction force of each part is balanced.

Description

Technical Field

[0001] The present invention relates to the technical field of workpiece welding devices, in particular to a mechanical engineering workpiece welding device. Background Art

[0002] Mechanical engineering workpiece welding equipment is a device used to connect two or more mechanical engineering workpieces together through a welding process. It is generally divided into manual welding equipment, semi-automatic welding equipment and automatic welding equipment.

[0003] Among them, the steel pipe T-shaped saddle welding machine is a device used to weld saddle-shaped welds at the T-shaped joints of steel pipes. During welding, the worker fixes the steel pipe to be welded with a clamp, and then controls the welding gun to approach the steel pipe joint. The welding gun moves along the intersection line trajectory of the steel pipe T-shaped saddle and welds according to the preset welding parameters.

[0004] However, during welding, the saddle mouth experiences uneven heating and cooling. Due to the asymmetric shape of the saddle mouth, different parts experience different degrees of thermal expansion and contraction, which can easily generate large welding stresses, leading to deformation of the weldment. For example, the connection between the branch pipe and the main pipe may be twisted or bent, affecting the dimensional accuracy and assembly quality of the weldment. Therefore, we propose a welding device for mechanical engineering workpieces. Summary of the Invention

[0005] The present invention aims to provide a welding device for mechanical engineering workpieces to address the problem, discussed in the background art, of uneven heating and cooling of the saddle during welding. Due to the asymmetric shape of the saddle, different areas experience varying degrees of thermal expansion and contraction, which can easily generate significant welding stress and lead to weld deformation.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a mechanical engineering workpiece welding device, comprising a welding base; a clamping jaw driving seat, the clamping jaw driving seat being mounted on the welding base; a clamping mechanism, the clamping mechanism being connected to the clamping jaw driving seat, the clamping jaw driving seat driving the clamping mechanism to rotate; a pipe abutment, the pipe abutment being mounted on the welding base, the working surface of the clamping mechanism corresponding to the pipe abutment; a welding frame, the welding frame being mounted on the welding base, the welding frame being composed of a flexible support arm and a fixed seat; a welding head, the outer side of the welding head being fixedly connected to a flexible support rod 1, the flexible support rod 1 being connected to the welding frame;

[0007] The guide mechanism is located on the surface of the welding frame. When the clamping mechanism drives the pipe to rotate, the guide mechanism contacts the weld in advance. The guide mechanism adjusts the welding angle of the welding head according to the intersection line trajectory of the T-shaped saddle mouth of the steel pipe;

[0008] The segmentation mechanism is connected with the guide mechanism. When the guide mechanism moves along the intersection line track of the T-shaped saddle mouth of the steel pipe, the segmentation mechanism adjusts the welding sequence of the welding head.

[0009] Among them, the clamping mechanism includes a clamping claw plate, which is fixed to the clamping claw drive seat. Two groups of adjustment grooves are opened on the surface of the clamping claw plate. The two groups of adjustment grooves are symmetrical about the axis of the clamping claw plate. A plurality of threaded grooves are opened on the inner wall of the adjustment groove. The inner wall of the threaded groove is threadedly connected to a limit rod. There are two limit rods threadedly connected in each group of adjustment grooves.

[0010] Among them, an adjustment part is provided on the outside of one of the adjustment slots for adjusting the output power of the welding head according to the thickness of the main steel pipe. The adjustment part includes a baffle fixedly connected to the surface of the clamping disc, a detection plate is slidably connected to the inner wall of the baffle, a screw is rotatably connected to the surface of the clamping disc, the screw is threadedly connected to the inner wall of the detection plate, an insulating plate is fixedly connected to the outside of the detection plate, a sliding rheostat is installed on the surface of the clamping disc, the insulating plate is fixed to the sliding piece inside the sliding rheostat, a conductive ring is installed on the surface of the clamping disc, the conductive ring is connected to the sliding rheostat, a conductive seat is installed on the surface of the welding base, a conductive sheet is installed near one end of the conductive ring, the conductive ring is located on the inner side of the conductive sheet, the conductive ring is rotatably connected to the conductive sheet, and the conductive seat is connected to the fixed seat.

[0011] Among them, the guide mechanism includes a guide contact, a flexible support rod 2 is fixedly connected to the outside of the guide contact, a limiting block is fixedly connected to the outside of the flexible support rod 2, a limiting groove is provided on the surface of the flexible support arm, the limiting block is slidingly connected to the inner wall of the limiting groove, a compression spring 1 is fixedly connected to the outside of the limiting block, the compression spring 1 is fixed to the inner wall of the limiting groove, a guide part is provided on the surface of the flexible support arm, and the guide part is located on the outside of the flexible support rod 1.

[0012] Among them, the guide part includes a support frame located on the outside of the flexible support rod one, a flexible support rod three is fixedly connected to the outside of the support frame, the flexible support rod three is fixed to the flexible support arm, an iron sheet is fixedly connected to the outside of the flexible support rod one, a reset spring is fixedly connected to the outside of the iron sheet, the reset spring is fixed to the inner wall of the support frame, the inner wall of the support frame is fixedly connected to an electromagnet, and an adjustment control is provided on the outside of the limit block for adjusting the magnetic force of the electromagnet according to the position of the limit block.

[0013] The adjustment control unit includes an insulating plate 2 fixedly connected to the outer side of the limit block, a sliding rheostat 2 is installed on the surface of the flexible support arm, and the insulating plate 2 is fixed to the sliding piece of the sliding rheostat 2.

[0014] Among them, the segmentation mechanism includes arc groove 1 and arc groove 2 respectively located at the two ends of the limit groove. Arc groove 1 is provided with six arc transition sections, and arc groove 2 is provided with four arc transition sections. The inner wall of arc groove 1 is installed with limit switch 1, limit switch 3 and limit switch 5, and the inner wall of arc groove 2 is installed with limit switch 2 and limit switch 4. Trigger members are respectively provided at both ends of the limit groove, and the two trigger members are respectively located on the outside of arc groove 1 and arc groove 2.

[0015] Among them, the trigger part includes a moving block that is slidably connected to the inner wall of the limiting groove, a sliding groove is opened on the inner wall of the moving block, a silicone block is slidably connected to the inner wall of the sliding groove, the silicone block is slidably connected to the inner wall of the arc groove, and a plurality of compression springs 2 are fixedly connected to the outside of the moving block, and the compression springs 2 are fixed to the inner wall of the limiting groove.

[0016] The surfaces of the first arc groove and the second arc groove are respectively provided with a plurality of stepped sections.

[0017] Among them, travel switch 1 and travel switch 4 are normally closed contacts, which are closed in the normal state and open when triggered. Travel switch 2, travel switch 3 and travel switch 5 are normally open contacts, which are open in the normal state and closed when triggered.

[0018] The present invention has at least the following beneficial effects:

[0019] 1. When using this application, the operator can connect the steel pipe main pipe to be welded with the branch pipe through the clamping mechanism and the pipe abutment, so that the weld at the steel pipe joint is saddle-shaped. When the clamping mechanism fixes the steel pipe main pipe, it can detect the wall thickness of the steel pipe main pipe, thereby adjusting the output power of the welding head according to the wall thickness of the main pipe.

[0020] 2. When the clamping jaw drive seat drives the main pipe and the branch pipe to rotate, the guide mechanism moves along the intersection line trajectory of the T-shaped saddle mouth of the steel pipe. Since the intersection line of the saddle mouth is elliptical, the guide contact of the guide mechanism will be displaced in the vertical direction. The guide mechanism adjusts the angle between the welding head and the saddle mouth according to the vertical displacement of the guide contact. When the guide contact moves in the vertical direction, the segmentation mechanism divides the weld into several small sections and performs interval welding on each section to make the welding stress evenly distributed, avoid stress concentration, and balance the contraction force of each part. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic structural diagram of the clamping mechanism of the present invention;

[0023] Figure 3 for Figure 2 Enlarged schematic diagram of area A in the middle;

[0024] Figure 4 This is a schematic diagram of the connection relationship between the structural welding head and the flexible support arm of the present invention;

[0025] Figure 5 This is a schematic structural diagram of the guide mechanism of the present invention;

[0026] Figure 6 This is a schematic diagram of the guide structure of the present invention;

[0027] Figure 7 This is a schematic cross-sectional view of the limiting groove of the present invention;

[0028] Figure 8 for Figure 7 Enlarged schematic diagram of area B in the middle;

[0029] Figure 9 Schematic diagram of the main view of the arc groove 1 and the arc groove 2 of the present invention;

[0030] Figure 10 This is a schematic diagram of the trigger structure of the present invention;

[0031] Figure 11 This is a schematic diagram of the connection relationship between the spring damper and the travel switch of the present invention.

[0032] In the figure: 1. welding base; 2. clamping jaw drive seat; 3. clamping mechanism; 30. clamping jaw plate; 31. adjusting groove; 32. threaded groove; 33. limit rod; 34. adjusting member; 35. baffle; 36. detection plate; 37. screw; 38. sliding rheostat 1; 39. conductive ring; 310. conductive seat; 311. conductive sheet; 312. insulating plate 1; 4. pipe abutment; 5. welding frame; 50. flexible support arm; 51. fixing seat; 6. welding head; 60. flexible support rod 1; 7. guide mechanism; 70. guide contact; 71. flexible support rod 2; 72. limit block; 73. Limiting groove; 74, compression spring one; 75, guide member; 76, support frame; 77, flexible support rod three; 78, iron sheet; 79, return spring; 710, electromagnet; 711, adjustment control; 712, insulating plate two; 713, sliding rheostat two; 8, segmented mechanism; 80, arc groove one; 81, arc groove two; 82, limit switch one; 83, limit switch three; 84, limit switch five; 85, limit switch two; 86, limit switch four; 87, trigger member; 88, moving block; 89, slide groove; 810, silicone block; 811, compression spring two; 812, spring damper. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] Example 1

[0035] See also Figures 1 to 11 The present invention provides a technical solution: a mechanical engineering workpiece welding device, comprising a welding base 1; a clamping jaw driving seat 2, the clamping jaw driving seat 2 being mounted on the welding base 1; a clamping mechanism 3, the clamping mechanism 3 being connected to the clamping jaw driving seat 2, the clamping jaw driving seat 2 driving the clamping mechanism 3 to rotate; a pipe abutment 4, the pipe abutment 4 being mounted on the welding base 1, the working surface of the clamping mechanism 3 corresponding to the pipe abutment 4; a welding frame 5, the welding frame 5 being mounted on the welding base 1, the welding frame 5 being composed of a flexible support arm 50 and a fixing seat 51; Welding head 6, a flexible support rod 60 is fixedly connected to the outside of the welding head 6, and the flexible support rod 60 is connected to the welding frame 5; the guiding mechanism 7, the guiding mechanism 7 is located on the surface of the welding frame 5, and when the clamping mechanism 3 drives the pipe to rotate, the guiding mechanism 7 contacts the weld in advance, and the guiding mechanism 7 adjusts the welding angle of the welding head 6 according to the intersection line trajectory of the T-shaped saddle mouth of the steel pipe; the segmenting mechanism 8, the segmenting mechanism 8 is connected to the guiding mechanism 7, and when the guiding mechanism 7 moves along the intersection line trajectory of the T-shaped saddle mouth of the steel pipe, the segmenting mechanism 8 adjusts the welding sequence of the welding head 6.

[0036] When in use, the worker fixes the main pipe of the steel pipe through the clamping mechanism 3, and abuts the branch pipe against the connection of the main pipe through the pipe abutment 4, so that the main pipe and the branch pipe form a T-shaped connection.

[0037] The inner core of the flexible support arm 50 and the flexible support rod 60 is mostly a nickel-titanium alloy core, which has stronger elasticity and is not easy to break after long-term bending, providing rigid support and shaping capabilities. The outer covering of the flexible support arm 50 and the flexible support rod 60 is made of silicone, rubber or PVC plastic, which has a soft feel, is insulated and non-slip, and protects the metal core at the same time. The inner core metal has a certain rigidity (maintains shape) and plasticity (can be bent manually). After bending, the internal stress of the metal maintains deformation, thereby fixing the angle. The flexible outer covering increases friction to prevent rebound due to gravity or external force after bending, while improving the comfort and safety of holding.

[0038] After the main pipe and the branch pipe are limited, the staff adjusts the flexible support arm 50 to move the welding head 6 and the guide mechanism 7 to the T-shaped saddle position of the steel pipe, and adjusts the flexible support rod 60 to make the welding head 6 outside the weld. The staff adjusts the guide contact 70 of the guide mechanism 7 to the intersection line surface of the T-shaped saddle of the steel pipe, so that when the clamp driving seat 2 drives the main pipe and the branch pipe to rotate, the weld at the saddle and the guide contact 70 squeeze each other, causing the guide contact 70 to move in the vertical direction. The guide mechanism 7 adjusts the angle between the welding head 6 and the saddle according to the vertical displacement of the guide contact 70, and when the guide contact 70 moves in the vertical direction, the segmentation mechanism 8 divides the weld into several small sections, and performs interval welding in each section to make the welding stress evenly distributed, avoid stress concentration, and balance the contraction force of each part.

[0039] The clamping mechanism 3 includes a clamping plate 30, which is fixed to the clamping drive base 2. Two groups of adjustment grooves 31 are provided on the surface of the clamping plate 30. The two groups of adjustment grooves 31 are symmetrical about the axis of the clamping plate 30. A plurality of threaded grooves 32 are provided on the inner wall of the adjustment groove 31. The inner wall of the threaded groove 32 is threadedly connected to a limit rod 33. Two limit rods 33 are threadedly connected to the inner wall of each group of adjustment grooves 31.

[0040] When clamping the main pipe of the steel pipe, the distance between the two limiting rods 33 is adjusted according to the size of the main pipe. The limiting rods 33 are threadedly connected to the inner wall of the threaded groove 32 to cooperate with the clamping and limiting of the two ends of the main pipe, so that the main pipe is fixed on the surface of the clamping claw plate 30, and the branch pipe is abutted against the connection of the main pipe through the pipe abutment member 4, so that the main pipe and the branch pipe form a T-shaped connection.

[0041] The guide mechanism 7 includes a guide contact 70, and a flexible support rod 2 71 is fixedly connected to the outer side of the guide contact 70, and a limiting block 72 is fixedly connected to the outer side of the flexible support rod 2 71. A limiting groove 73 is provided on the surface of the flexible support arm 50, and the limiting block 72 is slidably connected to the inner wall of the limiting groove 73. A compression spring 1 74 is fixedly connected to the outer side of the limiting block 72, and the compression spring 1 74 is fixed to the inner wall of the limiting groove 73. A guide member 75 is provided on the surface of the flexible support arm 50, and the guide member 75 is located on the outer side of the flexible support rod 1 60.

[0042] The material of the flexible support rod 2 71 is the same as that of the flexible support rod 1 60, so the staff adjusts the guide contact 70 to the intersection line surface of the T-shaped saddle mouth of the steel pipe by adjusting the flexible support rod 2 71. When the clamp drive seat 2 drives the clamp disk 30 to rotate, the steel pipe rotates with the clamp disk 30, and the steel pipe T-joint is formed by the vertical intersection of the main pipe (mother pipe) and the branch pipe (sub-pipe). The intersection line of the branch pipe and the main pipe is a saddle-shaped curve in space (mathematically called "intersection line"), with bulges on both sides of the saddle mouth and a depression in the middle, namely the "saddle peak" and the "saddle valley". From the welding point of view, this curve forms an elliptical trajectory on the surface of the main pipe, so that the saddle mouth weld of the steel pipe squeezes the guide contact 70 as the steel pipe rotates, so that every time the clamp disk 30 rotates one circle, the guide contact 70 will experience four processes of rising, falling, rising and falling in the vertical direction.

[0043] When the guide contact 70 moves toward the "saddle peak", the guide contact 70 pushes the limit block 72 to move through the flexible support rod 71, so that the limit block 72 slides upward on the inner wall of the limit groove 73, and the limit block 72 stretches the compression spring 74. When the guide contact 70 moves toward the "saddle valley", the compression spring 74 in the stretched state drives the limit block 72 to reset, and the limit block 72 moves to trigger the guide member 75. The guide member 75 adjusts the inclination angle of the flexible support rod 60 according to the moving distance of the guide contact 70, thereby adjusting the inclination angle of the welding head 6 and the saddle mouth of the steel pipe.

[0044] The guide member 75 includes a support frame 76 located on the outside of the flexible support rod 1 60, and a flexible support rod 3 77 is fixedly connected to the outside of the support frame 76. The staff adjusts the flexible support rod 3 77 to adjust the welding head 6 to face the steel pipe weld. The flexible support rod 3 77 is fixed to the flexible support arm 50. An iron sheet 78 is fixedly connected to the outside of the flexible support rod 1 60. A return spring 79 is fixedly connected to the outside of the iron sheet 78. The return spring 79 is fixed to the inner wall of the support frame 76. The inner wall of the support frame 76 is fixedly connected to an electromagnet 710. An adjustment control 711 for adjusting the magnetic force of the electromagnet 710 according to the position of the limit block 72 is provided on the outside of the limit block 72.

[0045] The adjustment control 711 includes an insulating plate 2 712 fixedly connected to the outer side of the limit block 72, and a sliding rheostat 2 713 is installed on the surface of the flexible support arm 50. The insulating plate 2 712 is fixed to the slider of the sliding rheostat 2 713, and the sliding rheostat 2 713 is connected in series with the electromagnet 710. The reduction in resistance leads to an increase in current and an increase in magnetic force.

[0046] When the guide contact 70 moves toward the "saddle peak", the limit block 72 moves upward along the limit groove 73, and the limit block 72 drives the insulating plate 2 712 to move upward. The insulating plate 2 712 drives the slider of the sliding rheostat 2 713 to move upward, so that the resistance of the sliding rheostat 2 713 decreases. When the voltage remains unchanged, the current intensity of the electromagnet 710 increases, thereby increasing the magnetic force of the electromagnet 710. The increased magnetic force of the electromagnet 710 drives the iron sheet 78 to move upward, and the iron sheet 78 drives the flexible support rod 1 60 to tilt upward. The flexible support rod 1 60 stretches the reset spring 79, and the flexible support rod 1 60 tilts upward, so that the welding head 6 is lifted, thereby maintaining an angle of 60°-80° with the tangential direction of the main pipe, ensuring uniform weld formation;

[0047] When the guide contact 70 moves toward the "Saddle Valley", the compression spring 1 74 in the stretched state pulls the limit block 72 to reset, the limit block 72 drives the insulating plate 2 712 to reset, and the insulating plate 2 712 drives the slider of the sliding rheostat 2 713 to reset, thereby increasing the resistance of the sliding rheostat 2 713. When the voltage remains unchanged, the current intensity of the electromagnet 710 decreases, the magnetic force of the electromagnet 710 decreases, and the reset spring 79 in the stretched state drives the flexible support rod 1 60 to reset.

[0048] The segmentation mechanism 8 includes an arc groove 1 80 and an arc groove 2 81 respectively located at both ends of the limit groove 73. The arc groove 1 80 is provided with six arc transition sections, and the arc groove 2 81 is provided with four arc transition sections. The inner wall of the arc groove 1 80 is installed with a limit switch 1 82, a limit switch 3 83 and a limit switch 5 84, and the inner wall of the arc groove 2 81 is installed with a limit switch 2 85 and a limit switch 4 86. A trigger member 87 is provided at both ends of the limit groove 73. The two trigger members 87 are respectively located on the outer sides of the arc groove 1 80 and the arc groove 2 81. The surfaces of the arc groove 1 80 and the arc groove 2 81 are respectively provided with multiple stepped sections. The limit switch 1 82 and the limit switch 4 86 are normally closed contacts, which are closed in the normal state and disconnected when triggered. The limit switch 2 85, the limit switch 3 83 and the limit switch 5 84 are normally open contacts, which are disconnected in the normal state and closed when triggered.

[0049] The trigger member 87 includes a moving block 88 that is slidably connected to the inner wall of the limiting groove 73. A sliding groove 89 is provided on the inner wall of the moving block 88. A silicone block 810 is slidably connected to the inner wall of the sliding groove 89. The silicone block 810 is slidably connected to the inner wall of the arc groove 1 80. A plurality of compression springs 2 811 are fixedly connected to the outer side of the moving block 88. The compression springs 2 811 are fixed to the inner wall of the limiting groove 73.

[0050] When the guide contact 70 moves toward the "saddle peak", the guide contact 70 pushes the limit block 72 to move upward along the inner wall of the limit groove 73. When the limit block 72 moves upward, it squeezes the moving block 88 located above it. The moving block 88 squeezes the compression spring 2 811. When the moving block 88 slides upward along the inner wall of the limit groove 73, it drives the silicone block 810 to move upward. The silicone block 810 is made of silicone material and has good elasticity. The moving block 88 drives the silicone block 810 to move upward along the surface of the arc groove 1 80. The inner wall of the arc groove 1 80 squeezes the silicone block 810, so that the silicone block 810 moves on the inner wall of the slide groove 89 of the moving block 88.

[0051] When the guide contact 70 moves toward the "Saddle Valley", the compression spring 1 74 in the stretched state drives the limit block 72 to slide downward along the inner wall of the limit groove 73, and the limit block 72 squeezes the moving block 88 located below, and the moving block 88 squeezes the compression spring 2 811. When the moving block 88 slides downward along the inner wall of the limit groove 73, it drives the silicone block 810 located on the inner wall of the moving block 88 below to move downward. This silicone block 810 slides along the inner wall of the arc groove 2 81. Under the squeezing of the inner wall of the arc groove 2 81, the silicone block 810 moves along the inner wall of the slide groove 89 of the moving block 88.

[0052] When the guide contact 70 is in the "saddle valley" position, the movable block 88 located below is at the lowest end position of the arc-shaped slot 2 81 , and the compression spring 2 811 located below is in a compressed state.

[0053] The surfaces of the arc groove 1 80 and the arc groove 2 81 are respectively provided with a plurality of stepped sections, and the stepped sections ensure that the silicone block 810 can only slide along a predetermined trajectory when sliding on the inner walls of the arc groove 1 80 and the arc groove 2 81 .

[0054] The travel switch 1 82 and the travel switch 4 86 are normally closed contacts, which are closed in the normal state and disconnected when triggered. The travel switch 2 85, the travel switch 3 83 and the travel switch 5 84 are normally open contacts, which are disconnected in the normal state and closed when triggered. The travel switch 1 82 and the travel switch 4 86 are connected in series in the circuit. As long as any one of them is triggered, the whole circuit is immediately disconnected. The travel switch 2 85, the travel switch 3 83 and the travel switch 5 84 are connected in parallel to form a branch. As long as any one of them is triggered, the branch is turned on. After the travel switch 1 82 and the travel switch 4 86 are connected in series, they are connected in series with the parallel travel switches 2 85, 3 83 and 5 84. Only when the travel switch 1 82 and the travel switch 4 86 are not triggered, and the travel switches 2 85, 3 83 and 5 84 are turned on, the circuit is turned on. Only when at least one of the switches 84 is triggered (closed branch) can the current pass through the load and the circuit be turned on. At this time, the welding head 6 will work and weld the saddle of the steel pipe. In addition, the travel switch 1 82, the travel switch 2 85, the travel switch 3 83, the travel switch 4 86 and the travel switch 5 84 all have built-in spring dampers 812. The spring damper 812 is composed of a spring and a damper. The spring provides a reset driving force (elastic potential energy is converted into kinetic energy). The damper consumes kinetic energy through mechanical resistance (such as fluid damping, friction damping) to slow down the rebound speed of the spring, thereby adjusting the reset time. After the silicone block 810 is separated from the travel switch 1 82, the spring damper 812 will slowly restore the travel switch 1 82 to its initial state, and the recovery time is the time required for the clamping disc 30 to rotate a quarter of a turn.

[0055] That is, the working process is as follows: in the initial state, the welding head 6 is started, the travel switch 5 84 is triggered first, the circuit is connected, the clamping claw plate 30 drives the steel pipe to rotate, and the weld seam at the steel pipe welding point from the "saddle valley" to the "saddle peak" (1 / 4 elliptical arc) is welded by the welding head 6 in the working state. At this time, the saddle mouth extrusion guide contact 70 at the welding point moves upward, and the limit block 72 pushes the moving block 88 located above. The moving block 88 drives the silicone block 810 to slide along the inner wall of the arc groove 1 80. After moving to the "saddle peak" position, the silicone block 810 triggers the travel switch 1 82 located on the inner wall of the arc groove 1 80. At this time, the spring damper 812 built into the travel switch 5 84 causes the travel switch 5 84 to return to the normally open state, the circuit of the welding head 6 is disconnected, and the welding head 6 stops welding the saddle mouth.

[0056] As the clamping plate 30 drives the steel pipe to continue to rotate, the saddle mouth's "saddle peak" to "saddle valley" passes through the guide contact 70. At this time, the compression spring 1 74 in the stretched state drives the limit block 72 to slide downward. At this time, the compression spring 2 811 in the compressed state pushes the upper moving block 88 to move downward, so that the moving block 88 drives the silicone block 810 on its inner wall to continue to slide along the inner wall of the arc groove 1 80, so that the silicone block 810 is separated from the travel switch 1 82, and the limit block 72 moves downward along the inner wall of the limit groove 73. The movable block 88 is slid and squeezed, and the movable block 88 drives the silicone block 810 on its inner wall to slide along the inner wall of the second arc groove 81. When it moves to the "saddle valley" position, the silicone block 810 triggers the second limit switch 85 on the inner wall of the second arc groove 81. The limit switch 85 is closed. At this time, the spring damper 812 in the limit switch 1 82 just makes the limit switch 1 82 return to the normally closed state, so that the circuit of the welding head 6 is connected, and the welding head 6 is started to cooperate with welding in the next moving area.

[0057] The clamping jaw plate 30 drives the steel pipe to continue to rotate, and the "saddle valley" to "saddle peak" area of ​​the saddle mouth passes through the guide contact 70. At this time, the welding head 6 in the working state welds the weld in this area. The area here is symmetrical with the initial area. The saddle mouth at the welding location squeezes the guide contact 70 to move upward, and the limit block 72 pushes the moving block 88 located above. The moving block 88 drives the silicone block 810 to slide along the inner wall of the arc groove 1 80. After moving to the "saddle peak" position, the silicone block 810 triggers the travel switch 3 83 located on the inner wall of the arc groove 1 80. At this time, the built-in spring damper 812 of the travel switch 2 85 causes the travel switch 2 85 to return to the normally open state. After the travel switch 3 83 is triggered, the travel switch 3 83 is closed, the circuit of the welding head 6 is connected, and the welding head 6 is started to cooperate with the welding of the next moving area.

[0058] As the clamping plate 30 drives the steel pipe to continue to rotate, the saddle mouth's "saddle peak" to "saddle valley" passes through the guide contact 70, and the working welding head 6 welds the weld in this area. When it moves to the "saddle valley" position, the silicone block 810 triggers the travel switch 4 86 located on the inner wall of the arc groove 2 81. At this time, the spring damper 812 in the travel switch 3 83 just makes the travel switch 3 83 return to the normally open state. After the travel switch 4 86 is triggered, it is in the disconnected state, the circuit of the welding head 6 is disconnected, and the welding head 6 stops welding the saddle mouth. At this time, the clamping plate 30 has driven the steel pipe to rotate one circle, and the saddle mouth of the steel pipe has been welded to 3 / 4 area.

[0059] As the clamping plate 30 drives the steel pipe to continue to rotate, the "saddle valley" to "saddle peak" area of ​​the saddle mouth passes through the guide contact 70. At this time, the welding head 6 does not work, and thus will not weld the completed saddle mouth. When it moves to the "saddle peak" position, the silicone block 810 triggers the travel switch five 84 located on the inner wall of the arc groove one 80. At this time, the built-in spring damper 812 of the travel switch four 86 makes the travel switch four 86 return to the normally closed state. After being triggered, the travel switch five 84 becomes a closed state, so that the circuit of the welding head 6 is connected, and the welding head 6 is started to cooperate with the welding of the next moving 1 / 4 saddle mouth area, thereby completing the welding of the saddle mouth. By dividing the weld into several small sections and performing interval welding in each section, the welding stress is evenly distributed, stress concentration is avoided, and the contraction force of each part is balanced.

[0060] Example 2

[0061] In the second embodiment, the other structures remain unchanged. The difference from the first embodiment is that an adjusting member 34 for adjusting the output power of the welding head 6 according to the thickness of the main steel pipe is provided on the outside of one of the adjusting slots 31.

[0062] After the main pipe is fixed by the four limiting rods 33 , the wall thickness of the steel pipe is detected by the adjusting member 34 , and the output power of the welding head 6 is adjusted according to the wall thickness of the steel pipe.

[0063] The adjusting member 34 includes a baffle 35 fixedly connected to the surface of the clamping disc 30, and a detection plate 36 is slidably connected to the inner wall of the baffle 35. A screw 37 is rotatably connected to the surface of the clamping disc 30, and the screw 37 is threadedly connected to the inner wall of the detection plate 36. An insulating plate 312 is fixedly connected to the outer side of the detection plate 36. A sliding rheostat 38 is installed on the surface of the clamping disc 30, and the insulating plate 312 is fixed to the sliding piece inside the sliding rheostat 38. A conductive ring 39 is installed on the surface of the clamping disc 30, and the conductive ring 39 is connected to the sliding rheostat 38. A conductive seat 310 is installed on the surface of the welding base 1, and a conductive sheet 311 is installed on one end of the conductive seat 310 near the conductive ring 39. The conductive ring 39 is located on the inner side of the conductive sheet 311. The conductive ring 39 is rotatably connected to the conductive sheet 311, and the conductive seat 310 is connected to the fixed seat 51;

[0064] When detecting the wall thickness of the steel pipe, the end of the steel pipe is placed against the inner side of the baffle 35, and the staff rotates the screw 37 so that the screw 37 drives the outer detection plate 36 to move, so that the detection plate 36 is attached to the inner wall of the steel pipe, thereby detecting the wall thickness of the steel pipe. When the detection plate 36 moves, the detection plate 36 drives the insulating plate 312 to move, and the insulating plate 312 drives the slider in the sliding rheostat 38 to move. The resistance of the sliding rheostat 38 in the circuit increases, so that under the condition that the voltage in the circuit remains unchanged, the current intensity will decrease. According to P=U*I, the output power of the welding head 6 will decrease, so that when the welding head 6 welds the saddle mouth of the steel pipe, the thinner the wall of the steel pipe, the lower the output power of the welding head 6, so as to avoid excessive output power of the welding head 6 causing welding deformation at the connection between the branch pipe and the main pipe.

[0065] When the jaw drive seat 2 drives the jaw disk 30 to rotate, the jaw disk 30 drives the baffle 35, the detection plate 36 and the sliding rheostat 38 to rotate, and the sliding rheostat 38 drives the conductive ring 39 to rotate. The interior of the conductive ring 39 is composed of an electric sheet. The electric sheet in the conductive ring 39 is connected to the sliding rheostat 38. The electric sheet in the conductive ring 39 is attached to the inner side of the conductive sheet 311, and the conductive sheet 311 on the side of the conductive seat 310 close to the conductive ring 39 is annular. When the conductive ring 39 rotates with the jaw disk 30, the conductive ring 39 rotates on the inner side of the conductive sheet 311, so that when the jaw disk 30 rotates, the sliding rheostat 38 on the surface of the jaw disk 30 is also electrically connected to the welding head 6.

[0066] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0067] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A mechanical engineering workpiece welding device comprising: Welding base; It is characterized in that: it also includes a clamping claw driving seat, and the clamping claw driving seat is installed on the welding base; A clamping mechanism, wherein the clamping mechanism is connected to a clamping claw driving seat, and the clamping claw driving seat drives the clamping mechanism to rotate; A pipe abutment, the pipe abutment being mounted on the welding base, and the working surface of the clamping mechanism corresponding to the pipe abutment; A welding frame, which is mounted on a welding base and consists of a flexible support arm and a fixing base; A welding head, wherein a flexible support rod 1 is fixedly connected to the outside of the welding head, and the flexible support rod 1 is connected to the welding frame; A guide mechanism is located on the surface of the welding frame. When the clamping mechanism drives the pipe to rotate, the guide mechanism contacts the weld in advance. The guide mechanism adjusts the welding angle of the welding head according to the intersection line trajectory of the T-shaped saddle mouth of the steel pipe; A segmentation mechanism, wherein the segmentation mechanism is connected to a guide mechanism, and when the guide mechanism moves along the intersection line trajectory of the T-shaped saddle of the steel pipe, the segmentation mechanism adjusts the welding sequence of the welding heads; The guide mechanism includes a guide contact, a second flexible support rod is fixedly connected to the outside of the guide contact, a limit block is fixedly connected to the outside of the second flexible support rod, a limit groove is provided on the surface of the flexible support arm, the limit block is slidably connected to the inner wall of the limit groove, a compression spring is fixedly connected to the outside of the limit block, the compression spring is fixed to the inner wall of the limit groove, a guide member is provided on the surface of the flexible support arm, and the guide member is located on the outside of the first flexible support rod; The guide member includes a support frame located outside the flexible support rod one, a flexible support rod three is fixedly connected to the outside of the support frame, the flexible support rod three is fixed to the flexible support arm, an iron sheet is fixedly connected to the outside of the flexible support rod one, a return spring is fixedly connected to the outside of the iron sheet, the return spring is fixed to the inner wall of the support frame, the inner wall of the support frame is fixedly connected to an electromagnet, and an adjustment control is provided on the outside of the limit block for adjusting the magnetic force of the electromagnet according to the position of the limit block; The adjustment control comprises a second insulating plate fixedly connected to the outer side of the limit block, a second sliding rheostat is mounted on the surface of the flexible support arm, and the second insulating plate is fixed to the sliding piece of the second sliding rheostat; The segmentation mechanism includes an arc-shaped groove 1 and an arc-shaped groove 2 respectively located at both ends of the limit groove, the arc-shaped groove 1 is provided with six arc-shaped transition sections, the arc-shaped groove 2 is provided with four arc-shaped transition sections, the inner wall of the arc-shaped groove 1 is installed with a limit switch 1, a limit switch 3 and a limit switch 5, the inner wall of the arc-shaped groove 2 is installed with a limit switch 2 and a limit switch 4, and the two ends of the limit groove are respectively provided with a trigger member, and the two trigger members are respectively located on the outside of the arc-shaped groove 1 and the arc-shaped groove 2; The trigger member includes a moving block that is slidably connected to the inner wall of the limiting groove, the inner wall of the moving block is provided with a sliding groove, the inner wall of the sliding groove is slidably connected to a silicone block, the silicone block is slidably connected to the inner wall of the arc groove, and a plurality of compression springs are fixedly connected to the outer side of the moving block, and the compression springs are fixed to the inner wall of the limiting groove.

2. The mechanical engineering workpiece welding device according to claim 1, characterized in that: The clamping mechanism includes a clamping plate, which is fixed to the clamping drive seat. Two groups of adjustment grooves are provided on the surface of the clamping plate. The two groups of adjustment grooves are symmetrical about the axis of the clamping plate. A plurality of threaded grooves are provided on the inner wall of the adjustment groove. The inner wall of the threaded groove is threadedly connected to a limit rod. Two limit rods are threadedly connected in each group of the adjustment grooves.

3. The mechanical engineering workpiece welding device according to claim 2, characterized in that: An adjusting member for adjusting the output power of the welding head according to the thickness of the main steel pipe is provided on the outside of one of the adjusting slots, and the adjusting member includes a baffle fixedly connected to the surface of the clamping disc, and a detection plate is slidably connected to the inner wall of the baffle, and a screw is rotatably connected to the surface of the clamping disc, and the screw is threadedly connected to the inner wall of the detection plate, and an insulating plate is fixedly connected to the outside of the detection plate, and a sliding rheostat is installed on the surface of the clamping disc, and the insulating plate is fixed to the sliding plate inside the sliding rheostat, and a conductive ring is installed on the surface of the clamping disc, and the conductive ring is connected to the sliding rheostat, and a conductive seat is installed on the surface of the welding base, and a conductive sheet is installed on the conductive seat near one end of the conductive ring, and the conductive ring is located on the inner side of the conductive sheet, and the conductive ring is rotatably connected to the conductive sheet, and the conductive seat is connected to the fixed seat.

4. The mechanical engineering workpiece welding device according to claim 1, characterized in that: The surfaces of the arc-shaped groove 1 and the arc-shaped groove 2 are respectively provided with a plurality of stepped sections.

5. The mechanical engineering workpiece welding device according to claim 1, characterized in that: The travel switch 1 and the travel switch 4 are normally closed contacts, which are closed in the normal state and opened when triggered. The travel switch 2, the travel switch 3 and the travel switch 5 are normally open contacts, which are opened in the normal state and closed when triggered.

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