A welding tool for automobile chassis parts

Abstract

The present invention relates to the technical field of welding tooling, and in particular to a welding tooling for automobile chassis parts, comprising a workbench, on which a first clamping assembly and a second clamping assembly are arranged, the first clamping assembly and the second clamping assembly respectively clamp and fix two side surfaces of a first weldment; the bottom surface of the first weldment is fixed by a positioning assembly; a second weldment is welded to the inner side of the first weldment, the second weldment is fixed by the clamping assembly, a zero position piece is arranged on the clamping assembly, the zero position piece is supported at the four corners of the second weldment, so that the second weldment is in a horizontal straight line state, the welding tooling stably fixes the first weldment and the second weldment on the welding tooling, so that the second weldment is placed horizontally, the weld bead is in a horizontal state, the welding work is convenient, and the welding precision and welding quality are improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding tools, in particular to a welding tool used for automobile chassis parts. Background Art

[0002] In the modern automobile manufacturing industry, the welding of automobile parts is one of the key production processes, and its quality and efficiency are directly related to the performance, safety and manufacturing cost of the whole vehicle. As an important equipment to assist the welding process, the design rationality and functionality of welding tooling play an irreplaceable role in improving the overall efficiency of welding operations.

[0003] During the manufacturing process of the fifth mounting bracket assembly of the automobile body, the first weldment and the second weldment need to be fixed on the welding fixture, and the three edges of the first weldment and the second weldment in contact are welded. When fixed on the welding fixture, the first weldment and the second weldment are usually fixed by positioning pins and pressing up and down. Because the first weldment and the second weldment are special-shaped bodies, this fixing method is prone to unstable fixation, reduced welding accuracy, reduced welding quality, and high defective rate after welding during welding, which seriously affects the production efficiency and welding quality of the fifth mounting bracket assembly of the vehicle body; during the fixture fixing process, the first weldment is usually placed horizontally, and the second weldment is placed at an angle, and two of the welds are inclined, which brings inconvenience to welding; the second weldment is usually supported by a support plate, and the entire surface of the second weldment is in contact with the support plate, and the contact area is large. Because there is a tolerance in the flatness of the second weldment, the second weldment on the support plate is easy to shake up and down during welding, resulting in a decrease in welding accuracy, which seriously affects the welding quality.

[0004] Therefore, the present invention provides a welding tool for automobile chassis parts to solve the problems raised in the above background technology. Summary of the invention

[0005] The purpose of the present invention is to provide a welding tool for automobile chassis parts to solve the problems existing in the prior art, such as unstable fixation of the fifth mounting bracket assembly of the vehicle body during welding, reduced welding accuracy, reduced welding quality, etc.

[0006] In order to solve the above technical problems, the present invention provides a welding tool for automobile chassis parts, including a workbench, on which a first clamping assembly and a second clamping assembly are arranged, and the first clamping assembly and the second clamping assembly respectively clamp and fix the two side surfaces of the first weldment; the bottom surface of the first weldment is fixed by a positioning assembly; the second weldment is welded to the inner side of the first weldment, and the second weldment is fixed by the clamping assembly, and a zero-position piece is arranged on the clamping assembly, and the zero-position piece is supported at the four corners of the second weldment so that the second weldment is in a horizontal straight line state.

[0007] A further improvement to the technical solution of the present invention is that the clamping assembly includes a support block arranged on a workbench, a horizontal support plate is arranged on the top of the support block, and zero-position parts are respectively arranged on the upper end surfaces on both sides of the U-shaped groove on the support plate, and the top surface of the zero-position parts is a plane, which is adapted to support the two corners of the front of the second weldment; a zero-position part is arranged on the upper surface on both sides of the rear of the U-shaped groove on the support plate, and the top surface of the zero-position part is a curved surface, which is adapted to support the two corners of the rear of the second weldment; and the four zero-position parts support the four corners of the second weldment on the same horizontal plane.

[0008] A further improvement of the technical solution of the present invention is that the clamping assembly also includes a clamping cylinder fixed to the edge of the bottom surface of the workbench, the telescopic rod of the clamping cylinder is adapted to pass through the workbench and a U-shaped block C is arranged on the top, the top of the U-shaped block C is axially connected to a rotating member, and the rotating member is axially connected to the clamping rod.

[0009] A further improvement of the technical solution of the present invention is that a positioning column is also provided on the support plate, and the positioning column is adapted to penetrate the positioning hole on the second weldment.

[0010] An upper folding rod and a horizontal pressing rod are axially connected to a U-shaped block D at the bending connection of the upper folding rod and the end of the upper folding rod is axially connected to a rotating member. A clamping block A and a clamping block B are respectively arranged in the middle and end of the horizontal pressing rod. The clamping block A abuts against the edge of the upper surface of the second weldment, and the clamping block B abuts against the middle of the upper surface of the second weldment.

[0011] A further improvement of the technical solution of the present invention is that the positioning assembly also includes a positioning cylinder fixed on the workbench, a positioning pin is arranged on the telescopic rod of the positioning cylinder, an annular clamping groove is arranged on the upper part of the positioning pin, the annular clamping groove is adapted to the clamping piece, the clamping piece is disc-shaped as a whole, a U-shaped opening groove is arranged in the middle part, the U-shaped opening groove is adapted to the plug-in annular clamping groove, and is used to fix the first weldment.

[0012] A further improvement of the technical solution of the present invention is that the workbench is further provided with a fixing frame, a slanted fixing plate is provided on the top of the fixing frame, and the fixing plate abuts against the bottom surface of the first weldment to make the top surface of the first weldment horizontal.

[0013] A further improvement of the technical solution of the present invention is that the positioning cylinder is vertical to the fixed plate, the positioning pin in the positioning assembly is adapted to pass through the fixed plate and the first weldment in sequence, and the clamping piece is adapted at the upper part, and the positioning cylinder contracts to make the clamping piece abut against the first weldment.

[0014] A further improvement of the technical solution of the present invention is that the first clamping assembly includes a first cylinder horizontally fixed to the work surface through a bracket, a first clamping piece is arranged at the end of the telescopic rod in the first cylinder, and the first clamping piece is pressed against the side surface of the first weldment.

[0015] A further improvement of the technical solution of the present invention is that the second clamping assembly includes a second cylinder arranged in the middle of the bottom surface of the workbench, the telescopic rod in the second cylinder passes through the workbench and a U-shaped block A is arranged on the top, the U-shaped block A is axially connected to the end of the second clamping member, and a U-shaped block B is also arranged on the workbench surface, the U-shaped block B is axially connected to the bending portion of the second clamping member, and the other end face of the second clamping member is against the side face of the first weldment.

[0016] By adopting the above technical solution, the present invention has the following beneficial effects:

[0017] 1. The present invention provides a welding tool for automobile chassis parts, which clamps the side of the first weldment through a first clamping assembly and a second clamping assembly, fixes the bottom surface of the first weldment through a positioning assembly, and fixes the second weldment through a clamping assembly. The fixation is firm, which facilitates welding of the first weldment and the second weldment, and improves the welding accuracy, welding quality and welding pass rate.

[0018] 2. The present invention provides a welding tool for automobile chassis parts, which places a first weldment on a fixing frame at an angle. The fixing plate in the fixing frame is tilted at an angle so that the top surface of the first weldment is horizontal. The first weldment is fixed to the fixing plate through a positioning assembly, and the second weldment can be horizontally fixed on the clamping assembly. The weld bead between the first weldment and the second weldment is horizontal, which facilitates welding work and improves welding efficiency and quality.

[0019] 3. The present invention provides a welding tool for automobile chassis parts. The welding tool is provided with a support plate through a positioning component, and a zero-position part is provided on the support plate. The zero-position part provides support for the four corners of the second weldment, thereby reducing the tolerance of the flatness of the second weldment body and reducing the shaking during welding, thereby improving the welding efficiency, welding accuracy and welding quality.

[0020] 4. The present invention provides a welding tool for automobile chassis parts, in which a second clamping assembly is arranged. The second cylinder of the second clamping assembly is arranged on the bottom surface of the workbench. The second cylinder pushes the bent second clamping piece to rotate in the U-shaped block A and the U-shaped block B toward the first weldment, and squeezes and clamps the side of the first weldment located in the middle of the workbench firmly. The second clamping assembly simultaneously clamps and fixes the side surfaces of two sets of first weldments 1, thereby improving the practicality of the clamping of the second clamping assembly, improving the efficiency of welding, and saving space for the welding tool compared to simultaneously setting two sets of first clamping assemblies.

[0021] 5. The present invention provides a welding tool for automobile chassis parts. The positioning assembly in the welding tool fixes the bottom surface of the first weldment. An annular clamping groove is arranged on the upper part of the cylindrical positioning pin in the positioning assembly. The clamping part is disc-shaped as a whole, and a U-shaped opening groove is arranged in the middle. The U-shaped opening groove is adapted to be inserted into the annular clamping groove. Compared with the traditional cylindrical pin positioning, the welding tool adopts a positioning pin adapted to the second weldment for positioning, and then the clamping part is connected to the annular clamping groove for fixing. The fixation is more firm, which facilitates the welding work and improves the welding efficiency and quality.

[0022] 6. The present invention provides a welding tool for automobile chassis parts, in which the clamping rod is a bent structure with a bending angle of 110 degrees to 145 degrees, so that the clamping cylinder can drive the upper folding rod to rotate in the rotating part and the U-shaped block D, so that the horizontal crimping rod can rotate away from or close to the second weldment, and the second weldment can be loosened or clamped and fixed, so that the second weldment can be placed on the support plate and clamped and fixed, which is convenient for welding work and improves the efficiency, precision and quality of welding.

[0023] 7. The present invention provides a welding tool for automobile chassis parts, wherein a positioning column is arranged on a support plate of the welding tool, and the positioning column is adapted to penetrate the positioning hole on the second weldment to realize the fixed positioning of the second weldment, and two square zero-position pieces with flat top surfaces are respectively arranged on the upper end surfaces on both sides of the U-shaped groove of the support plate, which are adapted to support the two corners of the front of the second weldment, and square zero-position pieces with curved top surfaces are arranged on the upper surface on both sides of the rear of the U-shaped groove of the support plate, which are adapted to support the two corners of the rear of the second weldment, replacing the traditional support plate to support the second weldment with the entire surface, thereby avoiding the tolerance of the flatness of the lower surface of the second weldment, the lower surface of the second weldment is uneven, and shaking occurs during welding, thereby improving the stability of the second weldment during welding, ensuring the accuracy of welding, and improving the quality of welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 The figure is a schematic diagram of the structure of a welding tool for automobile chassis parts;

[0026] Figure 2 It is a structural schematic diagram of another aspect of a welding tool for automobile chassis parts;

[0027] Figure 3 for Figure 1 A schematic diagram of the structure of the first weldment and the second weldment;

[0028] Figure 4 for Figure 1 Explosion diagram of the first weldment and the second weldment;

[0029] Figure 5 It is a structural schematic diagram of components such as a workbench, a first clamping assembly, and a second clamping assembly;

[0030] Figure 6 is a structural schematic diagram of a first clamping assembly;

[0031] Figure 7 is a structural schematic diagram of a second clamping assembly;

[0032] Figure 8 It is a schematic diagram of the structure of the fixing frame, the first weldment and the positioning assembly;

[0033] Fig. 9 It is a schematic diagram of the structure of the positioning component;

[0034] Fig.10 It is a schematic diagram of the structure of the positioning pin and the clamping part;

[0035] Fig.11 is a structural schematic diagram of a clamping assembly;

[0036] Fig.12 It is a schematic diagram of the support plate structure;

[0037] Fig.13 It is a schematic diagram of the structure of the supporting plate, the second weldment and the clamping rod;

[0038] 1. First welding part; 2. Second welding part; 3. Workbench; 4. First clamping assembly; 5. Second clamping assembly; 6. Positioning assembly; 7. Clamping assembly; 31. Fixing frame; 32. Fixing plate; 41. First cylinder; 42. First clamping member; 51. Second cylinder; 52. U-shaped block A; 53. U-shaped block B; 54. Second clamping member; 61. Positioning cylinder; 62. Positioning pin; 63. Annular clamping groove; 64. Clamping member; 65. U-shaped opening groove; 71. Support block; 72. Support plate; 73. Zero position member; 74. Clamping cylinder; 75. U-shaped block C; 76. Rotating member; 77. Clamping rod; 78. U-shaped block D; 721. Positioning column; 722. Positioning hole; 771. Upper folding rod; 772. Horizontal crimping rod; 773. Clamping block A; 774. Clamping block B. DETAILED DESCRIPTION

[0039] The technical solution of the present invention will be described clearly and completely below 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 creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] The present invention is further explained below in conjunction with specific implementation modes.

[0043] like Figure 1-13As shown, a welding tool for automobile chassis parts provided in this embodiment includes a workbench 3, on which a first clamping assembly 4 and a second clamping assembly 5 are arranged, and the first clamping assembly 4 and the second clamping assembly 5 clamp and fix the two sides of the first weldment 1 respectively; the first clamping assembly 4 and the second clamping assembly 5 clamp and fix the two sides of the first weldment 1 respectively to make the first weldment 1 more firmly fixed, facilitate the welding work, and improve the quality of welding. The first clamping assembly 4 includes a first cylinder 41 horizontally fixed to the workbench 3 through a bracket, and a first clamping member 42 is arranged at the end of the telescopic rod of the first cylinder 41, and the first clamping member 42 abuts against the side of the first weldment 1; when in use, the telescopic rod of the first cylinder 41 is extended to abut against the side of the first weldment 1 located on the left and right edge sides of the workbench 3, so as to achieve the clamping and fixing of the side of the first weldment 1 located on the left and right edge sides of the workbench 3. The second clamping assembly 5 includes a second cylinder 51 arranged in the middle of the bottom surface of the workbench 3, the telescopic rod in the second cylinder 51 passes through the workbench 3 and a U-shaped block A52 is arranged on the top, the U-shaped block A52 is axially connected to the end of the second clamping member 54, and a U-shaped block B53 is also arranged on the workbench 3, the U-shaped block B53 is axially connected to the bending part of the second clamping member 54, and the other end surface of the second clamping member 54 is against the side surface of the first weldment 1; the second clamping member 54 is bent, and the second clamping member 54 includes A transverse rod and an upward bending rod, the end of which is axially connected to a U-shaped block A52. A U-shaped block B53 is also arranged between the second cylinder 51 on the workbench 3 and the first weldment 1. The U-shaped block B53 is axially connected to the bending portion of the second clamping member 54. The upward bending angle of the second clamping member 54 is 135 degrees. The vertical end face of the upward bending rod is against the side of the first weldment 1 located in the middle of the workbench 3, thereby clamping the side of the first weldment 1 located in the middle of the workbench 3. When in use, the telescopic tube in the second cylinder 51 extends upward to drive the U-shaped block A52 to move upward, and the end of the transverse rod of the second clamping member 54 rotates in the U-shaped block A52 toward the first weldment 1, and the bent portion of the second clamping member 54 rotates in the U-shaped block B53 toward the first weldment 1, so that the vertical end surface of the upward bent rod of the second clamping member 54 approaches the side of the first weldment 1 located in the middle of the workbench 3 until it is squeezed against the side of the first weldment 1 located in the middle of the workbench 3, and the side of the first weldment 1 located in the middle of the workbench 3 is squeezed and pressed firmly.

[0044] The symmetric axis inside the U-shaped block A52 is connected to two second clamping members 54, which can simultaneously clamp and fix the side surfaces of two sets of first weldments 1 symmetrically arranged about the U-shaped block A52, thereby improving the practicality of clamping of the second clamping assembly 5 and improving the welding efficiency. Compared with simultaneously arranging two sets of first clamping assemblies 4, it saves space for welding tooling.

[0045] like Figure 8As shown, the workbench 3 is also provided with a fixing frame 31, and an inclined fixing plate 32 is provided on the top of the fixing frame 31. The fixing plate 32 abuts against the bottom surface of the first weldment 1, so that the top surface of the first weldment 1 is in a horizontal state. The second weldment 2 is welded inside the first weldment 1, and the second weldment 2 is horizontally placed inside the second weldment 2. The second weldment 2 and the top surface of the first weldment 1 are both in a horizontal state. Therefore, the weld bead between the first weldment 1 and the second weldment 2 is horizontal, which facilitates the welding work and improves the welding work efficiency.

[0046] like Figure 8~Figure 10 As shown, the bottom surface of the first weldment 1 is fixed by a positioning assembly 6; the positioning assembly 6 also includes a positioning cylinder 61 fixed to the workbench 3, and a positioning pin 62 is arranged on the telescopic rod of the positioning cylinder 61, and the positioning pin 62 is a cylinder, and an annular clamping groove 63 is arranged on the upper part of the positioning pin 62, and the annular clamping groove 63 is adapted to the clamping piece 64, and the clamping piece 64 is disc-shaped as a whole, and a U-shaped opening groove 65 is arranged in the middle, and the U-shaped opening groove 65 is adapted to be plugged into the annular clamping groove 63, and is used to fix the first weldment 1. The U-shaped opening groove 65 provided in the middle of the clamping member 64 is adapted to be inserted into the annular clamping groove 63. The clamping member 64 is located at the outer periphery of the U-shaped opening groove 65 and is pressed against the bottom surface of the first weldment 1, so that the first weldment 1 is fixed on the fixing plate 32, and the bottom surface of the first weldment 1 is fixed. Compared with the traditional cylindrical pin position positioning, the welding tool adopts the positioning pin 62 for position positioning, and then the clamping member 64 is inserted into the annular clamping groove 63 for compression and fixing, which is more firmly fixed, convenient for welding work, and improves the efficiency and quality of welding. The positioning cylinder 61 is in a vertical state with the fixing plate 32. The positioning pin 62 in the positioning assembly 6 is adapted to the hole penetrating the fixing plate 32 and the hole on the first weldment 1 in turn, and is adapted to be clamped with the clamping member 64 at the upper part. The telescopic rod of the positioning cylinder 61 is contracted, so that the clamping member 64 is pressed against the first weldment 1. The bottom of the first weldment 1 is firmly fixed, which is convenient for welding work and improves the efficiency and quality of welding.

[0047] like Figure 11~Figure 13As shown, the second weldment 2 is fixed by the clamping assembly 7, which includes a support plate 72 on the top of the support block 71, and a positioning column 721 is arranged on the support plate 72. The positioning column 721 is adapted to penetrate the positioning hole 722 on the second weldment 2 to achieve the fixed positioning of the position of the second weldment 2. The clamping assembly 7 includes a support block 71 arranged on the workbench 3, a horizontal support plate 72 is arranged on the top of the support block 71, and zero-position pieces 73 are respectively arranged on the upper end surfaces on both sides of the U-shaped groove on the support plate 72. The zero-position pieces 73 are square blocks, and their top surfaces are flat, which are adapted to support the two corners of the front of the second weldment 2. The zero-position pieces 73 are arranged on the upper surfaces on both sides of the rear of the U-shaped groove on the support plate 72. The zero-position pieces 73 are square blocks, and their top surfaces are curved, which are adapted to support the two corners of the rear of the second weldment 2. The four zero-position pieces 73 support the four corners of the second weldment 2 on the same horizontal plane, providing support for the four corners of the second weldment 2. Each zero-position piece 73 provides support for the four corners of the second weldment 2. The height and shape of the zero-position piece 73 may be different according to the different shapes of the parts, as long as the four corners of the parts are supported to be on the same horizontal plane; the zero-position piece 73 supports the four corners of the second weldment 2 on the same horizontal plane, replacing the traditional support plate to support and fix the entire surface of the second weldment 2, avoiding the tolerance of the flatness of the lower surface of the second weldment 2, the lower surface of the second weldment 2 is uneven, and shaking occurs during welding, thereby improving the stability of the second weldment 2 during welding, ensuring the accuracy of welding, and improving the quality of welding. The clamping assembly 7 clamps the upper surface of the second weldment 2, and does not move or tilt during welding. The clamping effect is good, which facilitates the welding work. The clamping assembly 7 also includes a clamping cylinder 74 fixed to the edge of the bottom surface of the workbench 3. The telescopic rod of the clamping cylinder 74 is adapted to pass through the workbench 3 and a U-shaped block C75 is arranged on the top. The top of the U-shaped block C75 is axially connected to a rotating member 76, and the rotating member 76 is axially connected to a clamping rod 77. The clamping rod 77 is a bent structure. The clamping rod 77 includes an upper folding rod 771 and a horizontal pressing rod 772. The upper folding rod 771 and the horizontal pressing rod 772 are axially connected to a U-shaped block D78 at the bending connection. The end of the upper folding rod 771 is axially connected to the rotating member 76. A clamping block A773 and a clamping block B774 are respectively arranged in the middle and end of the horizontal pressing rod 772. The clamping block A773 abuts against the edge of the upper surface of the second weldment 2, and the clamping block B774 abuts against the middle of the upper surface of the second weldment 2. The clamping rod 77 has a bent structure with a bending angle of 110 to 145 degrees, which makes it easy for the clamping cylinder 74 to drive the upper folding rod 771 to rotate in the rotating member 76 and the U-shaped block D78, so that the horizontal crimping rod 772 rotates away from or close to the second weldment 2, thereby loosening or clamping the second weldment 2, making it easy to place the second weldment 2 on the support plate 72 and clamp it, thereby facilitating welding work and improving welding efficiency, accuracy and quality.During welding, the telescopic rod of the clamping cylinder 74 extends upward, the U-shaped block C75 moves upward, the rotating member 76 rotates toward the U-shaped block D78, and the clamping rod 77 rotates toward the second weldment 2 on the rotating member 76 and the U-shaped block D78 until it completely abuts against and clamps the second weldment 2, thereby fixing the upper surface of the second weldment 2 and ensuring that the second weldment 2 does not move or tilt during welding, thereby facilitating welding work and improving welding efficiency, precision and quality.

[0048] The working principle of a welding tool for automobile chassis parts provided in this embodiment is as follows: the user operates the welding tool, so that the first cylinder 41 in the first clamping assembly 4, the second cylinder 51 in the second clamping assembly 5, the positioning cylinder 61 in the positioning assembly 6, and the clamping cylinder 74 in the clamping assembly 7 are all in a retracted state; the first weldment 1 is placed on the fixing plate 32, the positioning cylinder 61 is started, the upper part of the positioning pin 62 is moved to the hole passing through the center of the first weldment 1, the clamping member 64 is inserted into the annular clamping groove 63, the positioning cylinder 61 is started again, the telescopic rod in the positioning cylinder 61 is retracted, and the clamping member 64 is located at the outer periphery of the U-shaped opening groove 65 and is crimped on the first weldment 1. The bottom surface of the weldment 1 is used to fix the first weldment 1. The fixing plate 32 is tilted at a certain angle. The positioning assembly 6 is in a vertical state with the fixing plate 32. The clamping member 64 is parallel to the fixing plate 32 and the bottom surface of the first weldment 1. The bottom surface of the first weldment 1 is pressed against the upper surface of the fixing plate 32. The clamping member 64 is pressed against the upper surface of the bottom surface of the first weldment 1 to fix the first weldment 1. The top surface of the first weldment 1 placed thereon is in a horizontal state, which is convenient for horizontal welding of the first weldment 1 and the second weldment 2. Since the top surface of the first weldment 1 is in a horizontal state, the second weldment 2 is placed horizontally in the second weldment 2, and the second weldment 2 and the top surface of the first weldment 1 are both in a horizontal state. The horizontal weld bead between the first weldment 1 and the second weldment 2 is convenient for welding work; it improves the efficiency, accuracy and quality of welding.The second weldment 2 is placed on the support plate 72, and a positioning column 721 is provided on the support plate 72. The positioning hole 722 on the second weldment 2 is inserted into the positioning column 721 to achieve position fixation. The zero-position piece 73 of the support plate 72 is supported at the four corners of the second weldment 2 to make the second weldment 2 in a horizontal state; the setting of the zero-position piece 73 effectively avoids the uneven surface of the second weldment 2, which causes the entire surface of the second weldment 2 to shake during support and fixation welding, and the weld bead is offset, thereby improving the quality and accuracy of welding; the clamping cylinder 74 is started, the clamping cylinder 74 is extended, the U-shaped block C75 moves upward, the rotating member 76 rotates toward the U-shaped block D78, and the clamping rod 77 is on the rotating member 76 and the U-shaped block D78 Rotate toward the second weldment 2 until the clamping block A773 abuts against the edge of the upper surface of the second weldment 2, and the clamping block B774 abuts against the middle of the upper surface of the second weldment 2, so as to fix the upper surface of the second weldment 2 and ensure that the second weldment 2 does not move or tilt during welding, which facilitates the welding work and improves the efficiency, precision and quality of welding; at the same time, start the first cylinder 41 in the first clamping assembly 4 and the second cylinder 51 of the second clamping assembly 5; the telescopic rod in the first cylinder 41 extends until the first clamping piece 42 abuts against the side of the first weldment 1; the telescopic rod in the second cylinder 51 extends, driving the U-shaped block A52 to move upward, driving the second clamping piece 54 between the U-shaped blocks A52 and U-shaped Block B53 is rotated toward the side of the first weldment 1 until the end face of the second clamping member 54 abuts against the side of the first weldment 1. The first clamping assembly 4 and the second clamping assembly 5 respectively clamp and fix the two side faces of the first weldment 1 to prevent the first weldment 1 from tilting, rotating and other problems during welding, which affect the welding work; the first clamping assembly 4 and the second clamping assembly 5 respectively clamp the two side faces of the first weldment 1 firmly, thereby improving the welding accuracy and quality; the first clamping assembly 4, the second clamping assembly 5, the positioning assembly 6 and the clamping assembly 7 firmly fix the first weldment 1 and the second weldment 2 on the welding tool, and the two sides of the second weldment 2 that contact the first weldment 1 can be welded, and the welding work After completion, start the first cylinder 41 in the first clamping assembly 4 and the second cylinder 51 in the second clamping assembly 5 to shrink their telescopic rods and no longer clamp the side of the first weldment 1. Start the clamping cylinder 74 in the clamping assembly 7 to shrink the telescopic rod of the clamping cylinder 74, driving the clamping rod 77 away from the second weldment 2. Start the positioning cylinder 61 in the positioning assembly 6 to extend the telescopic rod in the positioning cylinder 61, remove the clamping piece 64 clamped in the annular clamping groove 63, start the positioning cylinder 61, and move the positioning pin 62 in the positioning cylinder 61 away from the fixed plate 32. The user takes out the first weldment 1 and the second weldment 2 formed by welding, and then puts in the next two weldments, and repeats the above actions to perform welding.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A welding tool for automobile chassis parts, characterized in that: The invention comprises a workbench (3), on which a first clamping assembly (4) and a second clamping assembly (5) are arranged, and the first clamping assembly (4) and the second clamping assembly (5) respectively clamp and fix two side surfaces of a first weldment (1); the bottom surface of the first weldment (1) is fixed by a positioning assembly (6); the second weldment (2) is welded to the inner side of the first weldment (1), and the second weldment (2) is fixed by a clamping assembly (7); a zero position piece (73) is arranged on the clamping assembly (7), and the zero position piece (73) is supported at four corners of the second weldment (2), so that the second weldment (2) is in a horizontal straight line state; The clamping assembly (7) comprises a support block (71) arranged on the workbench (3), a horizontal support plate (72) arranged on the top of the support block (71), zero-position pieces (73) arranged on the upper end surfaces of the support plate (72) located on both sides of the U-shaped groove, respectively, the top surface of the zero-position piece (73) being a plane surface adapted to support two corners of the front portion of the second weldment (2), the upper surface of the support plate (72) located on both sides of the rear portion of the U-shaped groove being arranged with zero-position pieces (73), the top surface of the zero-position piece (73) being a curved surface adapted to support two corners of the rear portion of the second weldment (2), and the four zero-position pieces (73) supporting the four corners of the second weldment (2) on the same horizontal plane; A positioning column (721) is also provided on the support plate (72), and the positioning column (721) is adapted to penetrate a positioning hole (722) on the second weldment (2).

2. A welding tool for automobile chassis parts according to claim 1, characterized in that: The clamping assembly (7) further comprises a clamping cylinder (74) fixed to the bottom edge of the workbench (3); a telescopic rod of the clamping cylinder (74) is adapted to penetrate the workbench (3) and a U-shaped block C (75) is arranged on the top; the top of the U-shaped block C (75) is axially connected to a rotating member (76); and the rotating member (76) is axially connected to a clamping rod (77).

3. A welding tool for automobile chassis parts according to claim 2, characterized in that: The clamping rod (77) is a bent structure. The clamping rod (77) comprises an upper folding rod (771) and a horizontal pressing rod (772). The upper folding rod (771) and the horizontal pressing rod (772) are axially connected to a U-shaped block D (78) at the bent connection. The end of the upper folding rod (771) is axially connected to a rotating member (76). A clamping block A (773) and a clamping block B (774) are respectively arranged at the middle and end of the horizontal pressing rod (772). The clamping block A (773) abuts against the edge of the upper surface of the second weldment (2), and the clamping block B (774) abuts against the middle of the upper surface of the second weldment (2).

4. A welding tool for automobile chassis parts according to claim 1, characterized in that: The positioning assembly (6) further comprises a positioning cylinder (61) fixed on the workbench (3); a positioning pin (62) is arranged on the telescopic rod of the positioning cylinder (61); the positioning pin (62) is a cylinder; an annular clamping groove (63) is arranged on the upper part of the positioning pin (62); the annular clamping groove (63) is adapted to fit the clamping member (64); the clamping member (64) is disc-shaped as a whole; a U-shaped opening groove (65) is arranged in the middle; the U-shaped opening groove (65) is adapted to fit the annular clamping groove (63) and is used to fix the first weldment (1).

5. A welding tool for automobile chassis parts according to claim 4, characterized in that: The workbench (3) is further provided with a fixing frame (31), and an inclined fixing plate (32) is provided on the top of the fixing frame (31). The fixing plate (32) abuts against the bottom surface of the first weldment (1), so that the top surface of the first weldment (1) is in a horizontal state.

6. A welding tool for automobile chassis parts according to claim 5, characterized in that: The positioning cylinder (61) and the fixing plate (32) are in a vertical state. The positioning pin (62) in the positioning assembly (6) sequentially fits through the fixing plate (32) and the first weldment (1) and fits the clamping member (64) at the upper portion. The positioning cylinder (61) contracts so that the clamping member (64) abuts against the first weldment (1).

7. The welding tool for automobile chassis parts according to claim 1, characterized in that: The first clamping assembly (4) comprises a first cylinder (41) horizontally fixed to the workbench (3) via a bracket, a first clamping piece (42) being provided at the end of a telescopic rod in the first cylinder (41), and the first clamping piece (42) being in contact with a side surface of the first weldment (1).

8. The welding tool for automobile chassis parts according to claim 1, characterized in that: The second clamping assembly (5) comprises a second cylinder (51) arranged at the middle of the bottom surface of the workbench (3), a telescopic rod in the second cylinder (51) passes through the workbench (3) and a U-shaped block A (52) is arranged on the top, the U-shaped block A (52) is axially connected to the end of the second clamping member (54), and a U-shaped block B (53) is also arranged on the workbench (3), the U-shaped block B (53) is axially connected to the bent portion of the second clamping member (54), and the other end surface of the second clamping member (54) is in contact with the side surface of the first weldment (1).

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