Manual resistance spot welding special machine for stainless steel train body

Abstract

The utility model relates to the technical field of resistance welding equipment, in particular to a special manual resistance spot welding machine for a stainless steel train body, which comprises a rotating ring, a transformer, an air cylinder, a fixed arm component, a movable arm component, a pull rod component and a hanging component. The pull rod assembly penetrates through the rotating ring and is connected with the movable arm assembly, the fixed arm assemblies are fixedly installed on the two sides of the movable arm assembly through rotating shafts, and one ends of the fixed arm assemblies are clamped to the two sides of the rotating ring through a plurality of L-shaped fixing plates. A transformer is installed on the lower portion of the air cylinder, installation plates are arranged on the two sides of the transformer respectively, and one end of each installation plate is fixedly installed on the rotating ring. A hanging assembly is further arranged on the outer edge of the rotating ring. The device is compact in structure and flexible to operate, the labor intensity of workers can be reduced, and the welding quality is effectively guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of resistance welding equipment, in particular to a manual resistance spot welding machine for stainless steel train bodies. Background Art

[0002] Stainless steel rail cars are primarily used in urban subway and light rail operations. Compared to carbon steel car bodies, stainless steel car bodies are simpler to manufacture and assemble, require no surface painting during use, and have a longer service life. Furthermore, compared to aluminum alloy car bodies, they offer greater fatigue resistance, higher wear resistance, lower cost, and are easier to repair if damaged. This makes stainless steel car bodies a highly promising type of rail car body, offering broad development prospects. The stainless steel car bodies are constructed from SUS301L, a special stainless steel for vehicles. Due to its high high-temperature strength, high resistivity, and poor thermal conductivity, spot welding requires high electrode pressure. Furthermore, stainless steel has a high coefficient of linear expansion, resulting in significant deformation during welding, which can easily cause intergranular corrosion and thermal cracking, resulting in reduced mechanical properties and compromised weld quality. This places high demands on welding equipment.

[0003] In order to meet the demand for resistance spot welding of stainless steel train bodies, the utility model proposes a special machine for manual resistance spot welding of stainless steel train bodies. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a manual resistance spot welding machine for stainless steel train bodies, which has a compact structure, flexible operation, can reduce the labor intensity of workers, and effectively ensure the welding quality.

[0005] The utility model solves the technical problem by adopting the following technical solutions:

[0006] A manual resistance spot welding machine for stainless steel train bodies, characterized by comprising:

[0007] A swivel, a transformer, a cylinder, a fixed arm assembly, a movable arm assembly, a pull rod assembly and a hanging assembly. A cylinder is fixedly mounted on one side of the swivel by screws, a pull rod assembly is provided at the center of the cylinder, the pull rod assembly passes through the swivel and is connected to the movable arm assembly, fixed arm assemblies are fixedly mounted on both sides of the movable arm assembly through rotating shafts, one end of the fixed arm assembly is clamped on both sides of the swivel through a number of L-shaped fixing plates; a transformer is installed at the lower part of the cylinder, mounting plates are respectively provided on both sides of the transformer, one end of the mounting plate is fixed to the swivel; a hanging assembly is also provided on the outer edge of the swivel.

[0008] Moreover, the fixed arm assembly includes a fixed welding arm, a first fixed support plate, a second fixed support plate, a fixed support reinforcement plate, a fixed arm electrode rod, a lower electrode rod and a lower electrode cap. A welding arm insulating plate and a welding arm pad are installed on both sides of one end of the fixed welding arm from the inside to the outside. The first fixed support plate and the second fixed support plate are respectively installed on both sides of the welding insulation plate through a number of pin bolts. A fixed support reinforcement plate is installed between the first fixed support plate and the second fixed support plate, and the fixed support reinforcement plate is passed through a swivel. A fixed arm electrode rod is provided at the other end of the fixed welding arm, an anti-rotation mechanism is provided between the fixed arm electrode rod and the fixed welding arm, and a lower electrode connecting rod and a lower electrode cap are provided on the upper part of the fixed arm electrode rod from bottom to top.

[0009] Moreover, the movable arm assembly includes a movable arm, a movable arm electrode rod, an upper electrode connecting rod and an upper electrode cap. The movable arm electrode rod is installed at one end of the movable arm, an anti-rotation mechanism is arranged between the movable arm and the movable arm electrode rod, and the upper electrode connecting rod and the upper electrode cap are arranged in sequence from top to bottom at the lower part of the movable arm electrode rod.

[0010] Moreover, the first fixed support plate, the second fixed support plate, the fixed support reinforcement plate, the movable arm and the fixed welding arm are all made of 7075 aviation aluminum alloy.

[0011] Moreover, the hanging assembly includes a hanging rod and a hanging base, the hanging rod is arranged in an L shape, the hanging base is arranged on the outer edge of the swivel, and the hanging rod is arranged on the upper part of the hanging base.

[0012] Moreover, it also includes an operating handle, which is fixed to the upper part of the outer frame of the cylinder.

[0013] The advantages and positive effects of the utility model are:

[0014] The utility model clamps one end of the fixed arm assembly on both sides of the swivel through a plurality of L-shaped fixing plates. This double fixing method can effectively prevent the fixed arm assembly from large displacement during welding, effectively ensuring the quality of the welding point.

[0015] This utility model adopts an integrated structure of aviation aluminum alloy. When the maximum welding pressure of 15000N is met, the deformation of the welding arm is no more than 1.2mm, which can achieve high-quality welding of stainless steel materials. At the same time, the overall welding weight is controlled within 105kg. It has a compact structure, flexible operation, and is easy for workers to use.

[0016] The utility model connects the whole machine with the balancer through a hanging component. When welding, workers use a common operating handle to control the electrode opening size and welding of the welding machine, which is convenient for workers to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the utility model from the first perspective.

[0018] Figure 2 This is a structural diagram of the utility model from a second viewing angle.

[0019] Figure 3 This is a structural diagram of the fixed arm assembly of the utility model.

[0020] Figure 4 It is a structural schematic diagram of the movable arm assembly of the utility model.

[0021] Reference numerals

[0022] 1-Suspension assembly, 2-Swivel, 3-Cylinder, 4-Transformer, 5-Fixed arm assembly, 6-Movable arm assembly, 7-Operating handle, 8-L-shaped fixing plate, 9-Pull rod assembly, 10-Spindle, 11-Mounting plate, 12-Lower electrode cap, 13-Upper electrode cap, 14-Suspension base, 15-Suspension rod, 51-First fixed support plate, 52-Second fixed support plate, 53-Fixed support reinforcement plate, 54-Welding arm pad, 55-Welding arm insulation plate, 56-Fixed welding arm, 57-Fixed arm electrode rod, 58-Lower electrode connecting rod, 59-Pin bolt, 61-Movable arm, 62-Movable arm electrode rod, 63-Upper electrode connecting rod. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and through specific embodiments. The following embodiments are merely illustrative and non-restrictive, and should not be used to limit the scope of protection of the present invention.

[0024] A special machine for manual resistance spot welding of stainless steel train bodies, comprising:

[0025] The swivel 2, transformer 4, cylinder 3, fixed arm assembly 5, movable arm assembly 6, pull rod assembly 9 and hanging assembly 1, the cylinder 3 is fixedly installed on one side of the swivel 2 by screws, and a pull rod assembly 9 is arranged at the center of the cylinder 3, the pull rod assembly 9 passes through the swivel 2 and is connected with the movable arm assembly 6, the fixed arm assembly 5 is fixedly installed on both sides of the movable arm assembly 6 through the rotating shaft 10, and the movable arm assembly 6 is insulated from the fixed arm assembly 5, and one end of the fixed arm assembly 5 is clamped on both sides of the swivel 2 through a number of L-shaped fixing plates 8. This double fixing method can effectively prevent the fixed arm assembly 5 from large displacement during welding, thereby ensuring the quality of the weld; a transformer 4 is installed at the lower part of the cylinder 3, and mounting plates 11 are respectively arranged on both sides of the transformer 4, and one end of the mounting plate 11 is fixedly mounted on the swivel 2 to provide current for the workpiece during welding; a hanging assembly 1 is also arranged on the outer edge of the swivel 2.

[0026] In the embodiment of the present utility model, the cylinder 3 is a multi-stage force-boosting cylinder, which can realize up to 6 stages in series and can output a maximum thrust of 20kN; the maximum output current of the transformer 4 can reach 20kA.

[0027] The fixed arm assembly 5 includes a fixed welding arm 56, a first fixed support plate 51, a second fixed support plate 52, a fixed support reinforcement plate 53, a fixed arm electrode rod 57, a lower electrode rod and a lower electrode cap 12. The welding arm insulation plate 55 and the welding arm pad 54 are sequentially installed on both sides of one end of the fixed welding arm 56 from the inside to the outside. The first fixed support plate 51 and the second fixed support plate 52 are respectively installed on both sides of the welding insulation plate through a number of pin bolts 59. A fixed support reinforcement plate is installed between the first fixed support plate 51 and the second fixed support plate 52. The fixed support reinforcement plate 53 passes through the rotating ring 2 to provide insulation between the fixed welding arm 56 and the first fixed support plate 51, the second fixed support plate 52, and the fixed support reinforcement plate 53. A fixed arm electrode rod 57 is provided at the other end of the fixed welding arm 56. An anti-rotation mechanism is provided between the fixed arm electrode rod 57 and the fixed welding arm 56 to ensure that the upper and lower electrode caps 12 are always aligned during welding, ensuring the quality of the weld. A lower electrode connecting rod 58 and the lower electrode cap 12 are provided in order from bottom to top on the upper portion of the fixed arm electrode rod 57. The anti-rotation mechanism is conventional and will not be described in detail here.

[0028] In the embodiment of the present invention, there are eight pin bolts 59 , and four pin bolts 59 are fixedly mounted on one side of the welded insulating plate.

[0029] The movable arm assembly 6 includes a movable arm 61, a movable arm electrode rod 62, an upper electrode connecting rod 63 and an upper electrode cap 13. The movable arm electrode rod 62 is installed at one end of the movable arm 61. An anti-rotation mechanism is provided between the movable arm 61 and the movable arm electrode rod 62 to prevent the electrode cap from deflecting during welding. The upper electrode connecting rod 63 and the upper electrode cap 13 are provided in sequence from top to bottom at the lower part of the movable arm electrode rod 62.

[0030] The first fixed support plate 51, the second fixed support plate 52, the fixed support reinforcement plate 53, the movable arm 61 and the fixed welding arm 56 are all made of 7075 aviation aluminum alloy, which has high structural strength, light weight, easy operation, and can reduce the labor intensity of workers.

[0031] The movable arm 61 is made of a whole piece of aluminum.

[0032] The hanging assembly 1 includes a hanging rod 15 and a hanging base 14. The hanging rod 15 is arranged in an L shape. The hanging base 14 is arranged on the outer edge of the swivel 2, and the hanging rod 15 is arranged on the upper part of the hanging base 14. The entire welding machine is suspended on the balancer through the hanging assembly 1. When welding, the worker usually uses the operating handle 7 to control the motor opening size and welding.

[0033] It also includes an operating handle 7, which is fixed to the upper part of the outer frame of the cylinder 3.

[0034] In the embodiment of the present invention, the diameter of the welding electrode cap is The electrode cap end face structure is spherical with a spherical radius of R100mm. This type of electrode cap can withstand a maximum electrode pressure of 15kN during resistance spot welding of stainless steel body parts. The R100mm large spherical electrode end face structure ensures that only shallow indentations are formed on the surface of stainless steel body parts during welding.

[0035] The manual resistance spot welding machine for stainless steel train bodies in the present invention creatively adopts 8 pin bolts 59 to fasten the fixed welding arm 56 and the first fixed support plate 51 and the second fixed support plate 52 according to the characteristics of resistance spot welding of stainless steel train body parts. A double fixing structure is adopted between the fixed arm assembly 5 and the swivel 2, and an anti-rotation mechanism is designed between the fixed welding arm 56, the movable welding arm and the electrode rod. This ensures that when spot welding is carried out under a pressure of 15000N, the electrode deformation is small and the indentation on the workpiece surface is shallow, thereby effectively ensuring the welding quality.

[0036] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will understand that various replacements, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A manual resistance spot welding machine for stainless steel train bodies, characterized by: include: A swivel, a transformer, a cylinder, a fixed arm assembly, a movable arm assembly, a pull rod assembly and a hanging assembly. A cylinder is fixedly mounted on one side of the swivel by screws, a pull rod assembly is provided at the center of the cylinder, the pull rod assembly passes through the swivel and is connected to the movable arm assembly, fixed arm assemblies are fixedly mounted on both sides of the movable arm assembly through rotating shafts, one end of the fixed arm assembly is clamped on both sides of the swivel through a number of L-shaped fixing plates; a transformer is installed at the lower part of the cylinder, mounting plates are respectively provided on both sides of the transformer, one end of the mounting plate is fixed to the swivel; a hanging assembly is also provided on the outer edge of the swivel.

2. A manual resistance spot welding machine for stainless steel train bodies according to claim 1, characterized in that: The fixed arm assembly includes a fixed welding arm, a first fixed support plate, a second fixed support plate, a fixed support reinforcement plate, a fixed arm electrode rod, a lower electrode rod and a lower electrode cap. A welding arm insulating plate and a welding arm pad are installed on both sides of one end of the fixed welding arm from the inside to the outside. The first fixed support plate and the second fixed support plate are respectively installed on both sides of the welding insulation plate through a number of pin bolts. A fixed support reinforcement plate is installed between the first fixed support plate and the second fixed support plate, and the fixed support reinforcement plate is passed through a swivel. A fixed arm electrode rod is provided at the other end of the fixed welding arm, and an anti-rotation mechanism is provided between the fixed arm electrode rod and the fixed welding arm. A lower electrode connecting rod and a lower electrode cap are provided on the upper part of the fixed arm electrode rod from bottom to top.

3. The manual resistance spot welding machine for stainless steel train bodies according to claim 1, characterized in that: The movable arm assembly includes a movable arm, a movable arm electrode rod, an upper electrode connecting rod and an upper electrode cap. The movable arm electrode rod is installed at one end of the movable arm, an anti-rotation mechanism is provided between the movable arm and the movable arm electrode rod, and the upper electrode connecting rod and the upper electrode cap are arranged in sequence from top to bottom at the lower part of the movable arm electrode rod.

4. A manual resistance spot welding machine for stainless steel train bodies according to claim 2 or 3, characterized in that: The first fixed support plate, the second fixed support plate, the fixed support reinforcement plate, the movable arm and the fixed welding arm are all made of 7075 aviation aluminum alloy.

5. The manual resistance spot welding machine for stainless steel train bodies according to claim 1, characterized in that: The hanging assembly includes a hanging rod and a hanging base. The hanging rod is arranged in an L shape. The hanging base is arranged on the outer edge of the swivel, and the hanging rod is arranged on the upper part of the hanging base.

6. A manual resistance spot welding machine for stainless steel train bodies according to claim 1, characterized in that: It also includes an operating handle, which is fixed on the upper part of the outer frame of the cylinder.

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