Semi-automatic welding machine and using method

Abstract

The invention discloses a semi-automatic welding machine and a using method, and belongs to the technical field of welding machines, the semi-automatic welding machine comprises a base, a fixing mechanism is arranged on the base, a first weldment to be welded is fixed to one end of the fixing mechanism, the other end of the fixing mechanism is movably connected with a positioning welding mechanism, and the positioning welding mechanism is movably connected with the first weldment to be welded. The second weldment is fixed through the positioning welding mechanism, the fixing mechanism is sleeved with the first weldment, the positioning welding mechanism and the second weldment are driven by the fixing mechanism to move, and the first weldment and the second weldment are fixed and connected; the connecting rod drives the first welding head and the second welding head to move synchronously by rotating the screw rod, the first welding head is driven to rotate in the moving process, when the connecting rod abuts against a second welding piece, the welding ends of the first welding head and the second welding head are located at the welding seam, rapid and accurate positioning is achieved, and welding errors are reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of welding machines, and particularly relates to a semi-automatic welding machine and a using method thereof. Background Art

[0002] In modern industrial production, welding technology plays a crucial role. As a common welding device, semi-automatic welding machines have been widely used in many fields. However, there are still some problems to be solved urgently in the actual use of current semi-automatic welding machines.

[0003] During the welding process, the welding head needs to be accurately positioned at the weld position to ensure the welding quality. However, when the existing semi-automatic welding machines weld workpieces of different specifications, it is necessary to measure the weld position first and then move the welding head to that position for welding. There will be errors in both the position adjustment and measurement of the welding head, resulting in a decrease in welding accuracy. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the present invention provides a semi-automatic welding machine, which has the advantages of facilitating the accurate positioning of the welding head and improving the welding accuracy, and solves the problem that when the existing semi-automatic welding machines weld workpieces of different specifications, it is necessary to measure the weld position first and then move the welding head to that position for welding. There will be errors in both the position adjustment and measurement of the welding head, resulting in a decrease in welding accuracy.

[0005] The present invention is realized as follows. A semi-automatic welding machine includes a base. A fixing mechanism is provided on the base. One end of the fixing mechanism is fixed with a first workpiece to be welded, and the other end is movably connected with a positioning welding mechanism. The positioning welding mechanism includes a mounting frame, a first welding head, a second welding head and two groups of support rollers. The mounting frame abuts against one side of the second workpiece. The two groups of support rollers respectively abut against the upper and lower ends of the inner walls of the first workpiece and the second workpiece. The first welding head and the second welding head are movably arranged on the mounting frame and are respectively located inside and outside the welds of the first workpiece and the second workpiece.

[0006] Preferably, the fixing mechanism includes a fixing plate and a fixing frame. The fixing plate and the fixing frame are respectively fixedly installed at both ends of the upper surface of the base. A first motor is fixedly installed on one side of the fixing plate. A first lead screw and a first slide bar are respectively arranged on both sides of the fixing plate and the fixing frame.

[0007] Preferably, one end of the first lead screw is rotatably installed on the fixing frame, and the other end is fixedly connected to the output end of the first motor. Both ends of the first slide bar are fixedly connected to the fixing plate and the fixing frame respectively.

[0008] Preferably, on one side of the upper end of the fixing frame, a second motor is fixedly installed, and on the other side, a mounting disc is rotatably installed. The output end of the second motor is fixedly connected to the middle of the mounting disc. A plurality of support frames are circumferentially arranged on the mounting disc, and the support frames are in contact with the inner wall of one end of the first welded part.

[0009] Preferably, on one side of the bottom of the mounting frame, it is threadedly connected to the first lead screw, and on the other side, it is slidably connected to the first slide bar. On one side inside the mounting frame, a second lead screw is rotatably installed, and on the other side, a second slide bar is fixedly installed. On the top of the mounting frame, a third motor is fixedly installed, and the output end of the third motor is fixedly connected to the top of the second lead screw.

[0010] Preferably, movable blocks are respectively movably sleeved on the upper and lower rod bodies of the second lead screw and the second slide bar. The two movable blocks located in the upper part are fixedly connected. The support rollers are grouped in pairs, and the two groups of support rollers are respectively rotatably installed on one side of the four movable blocks.

[0011] Preferably, at the upper middle end of the movable block located in the upper part, a fixed seat is fixedly connected, and at the lower middle end, two guiding blocks are fixedly connected. On one side of the fixed seat, a screw rod is installed and connected. A movable frame is slidably connected to the two guiding blocks, and the screw rod threadedly penetrates through the movable frame.

[0012] Preferably, a fixed block is fixedly connected to the top of the mounting frame. One side of the upper end of the movable frame close to the fixed block is rotatably connected to a connecting rod. The connecting rod rotatably penetrates through the fixed block. A spiral groove is formed on the connecting rod, and a ball is rollingly installed inside the fixed block. The ball is rollingly arranged in the spiral groove.

[0013] Preferably, the first welding head and the second welding head are respectively fixedly installed at one end of the connecting rod and the movable frame. The positions of the welding ends of the first welding head and the second welding head are on the same vertical line.

[0014] The present invention also provides a use method of a semi-automatic welding machine, which specifically includes the following steps: Welding and fixing Sheathe the second welded part on the two groups of support rollers, start the third motor to drive the two groups of support rollers to move away from each other, tightly press the second welded part from the inside, sheathe one end of the first welded part on a plurality of support frames, start the first motor to drive the second welded part and the mounting frame to move towards the first welded part until the second welded part abuts against one end of the first welded part; Adjustment of the position of the welding end The rotating screw rod drives the movable frame to move outwards. The movable frame drives the first welding head and the second welding head to move synchronously. Through the cooperation of the ball and the spiral groove, the connecting rod drives the first welding head to rotate. When the welding end of the first welding head faces downwards, it stops rotating and moves horizontally following the connecting rod and the movable frame until the connecting rod abuts against the second welded part. At this time, the first welding head and the second welding head move to the weld seam; Rotary welding, Start the second motor to drive the first welded part and the second welding to rotate. Start the welding equipment to make the first welding head and the second welding head perform welding until one-week welding is completed.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention fixes the second welded part through the positioning welding mechanism, sleeved the first welded part on the fixing mechanism, and drives the positioning welding mechanism and the second welded part to move through the fixing mechanism, realizing the fixation of the first welded part and the second welded part and the connection between the two.

[0016] 2. The present invention rotates the screw rod to make the connecting rod drive the first welding head and the second welding head to move synchronously, and drives the first welding head to rotate during the movement. When the connecting rod abuts against the second welded part, the welding ends of the first welding head and the second welding head are located at the weld seam, realizing rapid and accurate positioning and reducing welding errors. Brief Description of the Drawings

[0017] Figure 1 It is an overall three-dimensional structure schematic diagram of the present invention in the state of connecting the first welded part and the second welded part; Figure 2 It is a top view structure schematic diagram of the present invention; Figure 3 For the present invention's Figure 2 Three-dimensional structure schematic diagram of the A-A cross-section; Figure 4 For the present invention's Figure 2 Three-dimensional structure schematic diagram of the B-B cross-section; Figure 5 It is an overall three-dimensional structure schematic diagram of the present invention in the state of not connecting the first welding and the second welded part; Figure 6 It is a partial three-dimensional structure schematic diagram of the positioning welding mechanism in the present invention.

[0018] In the figure: 1, base; 2, positioning welding mechanism; 21, mounting frame; 22, second lead screw; 23, second slide bar; 24, movable block; 25, support roller; 26, fixed seat; 27, guide block; 28, movable frame; 29, screw; 20, third motor; 211, fixed block; 212, connecting rod; 213, spiral groove; 214, first welding head; 215, second welding head; 216, ball; 3, fixing mechanism; 31, fixing plate; 32, first motor; 33, first lead screw; 34, first slide bar; 35, fixing frame; 36, second motor; 37, mounting disc; 38, support frame; 4, first weldment; 5, second weldment. Detailed implementation mode

[0019] In order to further understand the content, features and effects of the present invention, the following embodiments are exemplified and described in detail with reference to the accompanying drawings.

[0020] The structure of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] As Figures 1 to 6 shown, a semi-automatic welding machine provided by an embodiment of the present invention includes a base 1, a fixing mechanism 3 is arranged on the base 1, one end of the fixing mechanism 3 is fixedly connected with a first weldment 4 to be welded, and the other end is movably connected with a positioning welding mechanism 2. The positioning welding mechanism 2 includes a mounting frame 21, a first welding head 214, a second welding head 215 and two groups of support rollers 25. The mounting frame 21 abuts against one side of the second weldment 5, and the two groups of support rollers 25 respectively abut against the upper and lower ends of the inner walls of the first weldment 4 and the second weldment 5. The first welding head 214 and the second welding head 215 are movably arranged on the mounting frame 21 and are respectively located inside and outside the weld seams of the first weldment 4 and the second weldment 5.

[0022] Further, the fixing mechanism 3 includes a fixing plate 31 and a fixing frame 35. The fixing plate 31 and the fixing frame 35 are respectively fixedly installed at both ends of the upper surface of the base 1. A first motor 32 is fixedly installed on one side of the fixing plate 31. A first lead screw 33 and a first slide bar 34 are respectively arranged on both sides of the fixing plate 31 and the fixing frame 35. One end of the first lead screw 33 is rotatably installed on the fixing frame 35, and the other end is fixedly connected to the output end of the first motor 32. Both ends of the first slide bar 34 are fixedly connected to the fixing plate 31 and the fixing frame 35 respectively. A second motor 36 is fixedly installed on one side of the upper end of the fixing frame 35, and a mounting disc 37 is rotatably installed on the other side. The output end of the second motor 36 is fixedly connected to the middle of the mounting disc 37. A plurality of support frames 38 are arranged on the mounting disc 37 in a circumferential manner, and the support frames 38 abut against the inner wall of one end of the first weldment 4.

[0023] Specifically, the first lead screw 33 is a unidirectional lead screw, and the second lead screw 22 is a bidirectional lead screw. The second welded part 5 is fixed by the positioning welding mechanism 2. Subsequently, one end of the first welded part 4 is manually sleeved on a plurality of movable frames 28. By starting the first motor 32 to drive the first lead screw 33 to rotate, the positioning welding mechanism 2 drives the second welded part 5 to gradually approach the first welded part 4 until the second welded part 5 abuts against the second welded part 5, realizing the connection and fixation of the first welded part 4 and the second welded part 5. During subsequent welding, by starting the second motor 36 to drive the mounting disc 37 and the support frame 38 to rotate, thereby driving the first welded part 4 and the second welded part 5 to rotate, realizing rotary welding, which can ensure that the welds are uniform and consistent, helping to reduce the generation of welding defects such as pores, slag inclusions, and lack of fusion, and improving the reliability of welding.

[0024] Further, one side of the bottom of the mounting frame 21 is threadedly connected to the first lead screw 33, and the other side is slidably connected to the first slide bar 34. One side inside the mounting frame 21 is rotatably installed with a second lead screw 22, and the other side is fixedly installed with a second slide bar 23. The top of the mounting frame 21 is fixedly installed with a third motor 20. The output end of the third motor 20 is fixedly connected to the top of the second lead screw 22. Movable blocks 24 are respectively movably sleeved on the upper and lower end rod bodies of the second lead screw 22 and the second slide bar 23. The two movable blocks 24 located in the upper part are fixedly connected. The two support rollers 25 are in a group. The two groups of support rollers 25 are respectively rotatably installed on one side of the four movable blocks 24. The upper part of the middle of the movable block 24 located in the upper part is fixedly connected with a fixed seat 26, and the middle lower part is fixedly connected with two guide blocks 27. One side of the fixed seat 26 is installed and connected with a screw rod 29. A movable frame 28 is slidably connected on the two guide blocks 27. The screw rod 29 threadedly penetrates through the movable frame 28.

[0025] Specifically, the two groups of support rollers 25 are used to support and limit the second welded part 5. During use, the second welded part 5 is sleeved outside the two groups of support rollers 25, and one end of it is attached to the mounting frame 21. By starting the third motor 20 to drive the second lead screw 22 to rotate, the movable blocks 24 at the upper and lower ends move in opposite directions and gradually abut against the inner wall of the second welded part 5, realizing the fixation of the second welded part 5. After fixation, through the threaded cooperation between the bottom of the mounting frame 21 and the first lead screw 33 and the sliding cooperation with the first slide bar 34, the positioning welding mechanism 2 moves towards the direction close to the first welded part 4 until the second welded part 5 abuts against the first welded part 4, not only realizing the connection between the first welded part 4 and the second welded part 5, but also playing a role in fixing the first welded part 4, enabling the second welded part 5 to rotate synchronously with the first welded part 4 subsequently.

[0026] Further, a fixing block 211 is fixedly connected to the top of the mounting bracket 21. One side of the upper end of the movable bracket 28 close to the fixing block 211 is rotatably connected to a connecting rod 212. The connecting rod 212 rotatably penetrates through the fixing block 211. A spiral groove 213 is formed in the connecting rod 212. A ball 216 is rotatably installed inside the fixing block 211. The ball 216 is rotatably arranged in the spiral groove 213. The first welding head 214 and the second welding head 215 are respectively fixedly installed at one end of the connecting rod 212 and the movable bracket 28. The positions of the welding ends of the first welding head 214 and the second welding head 215 are on the same vertical line.

[0027] Specifically, the movable bracket 28 is L-shaped. The connecting rod 212 is rotatably connected to the upper end of the movable bracket 28. The lower end of the movable bracket 28 is slidably connected to the guide block 27. A screw rod 29 is threadedly penetrated through the middle of the movable bracket 28. The middle of the spiral groove 213 is spiral, and both ends are parallel to the base 1. In the initial state, the welding end of the first welding head 214 is located on the side far from the second welding head 215. When the connecting rod 212 moves towards or away from the first workpiece 4, through the cooperation of the ball 216 and the spiral groove 213, the connecting rod 212 drives the first welding head 214 to rotate, so that the welding end of the first welding head 214 rotates to the side close to the second welding head 215.

[0028] During operation, when the first workpiece 4 and the second workpiece 5 are fixed, when the positions of the first welding head 214 and the second welding head 215 need to be adjusted, the screw rod 29 is rotated to make the movable bracket 28 move away from the first workpiece 4. The second welding head 215 and the first welding head 214 move synchronously. The first welding head 214 rotates during the movement. When it rotates to be collinear with the end of the second welding head 215, the ball 216 is located at the rear end of the spiral groove 213, and the first welding head 214 stops rotating. Subsequently, the connecting rod 212 abuts against the side surface of the second workpiece 5. The first welding head 214 and the second welding head 215 are at the welding position. Through this setting, no matter what the thickness of the second workpiece 5 is, when the connecting rod 212 abuts against its side surface, the welding ends of the first welding head 214 and the second welding head 215 are both at the weld, so as to meet the fixing and welding requirements of workpieces of different specifications.

[0029] As Figures 1 - 6 shown, a method for using a semi-automatic welding machine provided by an embodiment of the present invention includes the following steps: Welding and fixing, Set the second welding part 5 on two sets of support rollers 25, start the third motor 20 to drive the two sets of support rollers 25 to move in opposite directions, press the second welding part 5 tightly from the inside, set one end of the first welding part 4 on several support frames 38, start the first motor 32 to drive the second welding part 5 and the mounting frame 21 to move towards the first welding part 4 until the second welding part 5 abuts against one end of the first welding part 4; Welding end position adjustment, Rotate the screw rod 29 to drive the movable frame 28 to move outwards. The movable frame 28 drives the first welding head 214 and the second welding head 215 to move synchronously. Through the cooperation of the ball 216 and the spiral groove 213, the connecting rod 212 drives the first welding head 214 to rotate. When the welding end of the first welding head 214 faces downwards, stop rotating and move horizontally along with the connecting rod 212 and the movable frame 28 until the connecting rod 212 abuts against the second welding part 5. At this time, the first welding head 214 and the second welding head 215 move to the weld; Rotary welding, Start the second motor 36 to drive the first welding part 4 and the second welding part to rotate, start the welding equipment to make the first welding head 214 and the second welding head 215 perform welding until one-week welding is completed.

[0030] To sum up: For this semi-automatic welding machine, the second welding part 5 is fixed by the positioning welding mechanism 2, the first welding part 4 is sleeved on the fixing mechanism 3, and the fixing mechanism 3 drives the positioning welding mechanism 2 and the second welding part 5 to move, realizing the fixation of the first welding part 4 and the second welding part 5 and the connection between the two. By rotating the screw rod 29, the connecting rod 212 drives the first welding head 214 and the second welding head 215 to move synchronously, and drives the first welding head 214 to rotate during the movement. When the connecting rod 212 abuts against the second welding part 5, the welding ends of the first welding head 214 and the second welding head 215 are located at the weld, realizing rapid and accurate positioning and reducing welding errors.

[0031] It should be noted that in this article, relational terms such as first and second are only used 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 term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A semi-automatic welding machine, comprising a base (1), characterized in that: A fixing mechanism (3) is arranged on the base (1). One end of the fixing mechanism (3) is fixedly connected with a first welding part (4) to be welded, and the other end is movably connected with a positioning welding mechanism (2). The positioning welding mechanism (2) includes a mounting frame (21), a first welding head (214), a second welding head (215) and two groups of support rollers (25). The mounting frame (21) abuts against one side of the second welding part (5). The two groups of support rollers (25) respectively abut against the upper and lower ends of the inner walls of the first welding part (4) and the second welding part (5). The first welding head (214) and the second welding head (215) are movably arranged on the mounting frame (21) and are respectively located inside and outside the weld seams of the first welding part (4) and the second welding part (5).

2. The semi-automatic welding machine according to claim 1, characterized in that: The fixing mechanism (3) includes a fixing plate (31) and a fixing frame (35). The fixing plate (31) and the fixing frame (35) are respectively fixedly installed at both ends of the upper surface of the base (1). A first motor (32) is fixedly installed on one side of the fixing plate (31). A first lead screw (33) and a first slide bar (34) are respectively arranged on both sides of the fixing plate (31) and the fixing frame (35).

3. The semi-automatic welding machine according to claim 2, characterized in that: One end of the first lead screw (33) is rotatably installed on the fixing frame (35), and the other end is fixedly connected to the output end of the first motor (32). Both ends of the first slide bar (34) are fixedly connected to the fixing plate (31) and the fixing frame (35) respectively.

4. The semi-automatic welding machine according to claim 2, wherein: On one side of the upper end of the fixing frame (35), a second motor (36) is fixedly installed, and on the other side, a mounting disc (37) is rotatably installed. The output end of the second motor (36) is fixedly connected to the middle of the mounting disc (37). A plurality of support frames (38) are arranged on the circumference of the mounting disc (37), and the support frames (38) abut against the inner wall of one end of the first welding part (4).

5. The semi-automatic welding machine according to claim 2, wherein: One side of the bottom of the mounting frame (21) is threadedly connected to the first lead screw (33), and the other side is slidably connected to the first slide bar (34). On one side of the inside of the mounting frame (21), a second lead screw (22) is rotatably installed, and on the other side, a second slide bar (23) is fixedly installed. A third motor (20) is fixedly installed on the top of the mounting frame (21), and the output end of the third motor (20) is fixedly connected to the top of the second lead screw (22).

6. The semi-automatic welding machine according to claim 5, wherein: Movable blocks (24) are respectively movably sleeved on the upper and lower rod bodies of the second lead screw (22) and the second slide bar (23). The two movable blocks (24) located in the upper part are fixedly connected. The two support rollers (25) are in a group, and the two groups of support rollers (25) are respectively rotatably installed on one side of the four movable blocks (24).

7. The semi-automatic welding machine according to claim 6, wherein: At the upper middle part of the movable block (24) located in the upper part, a fixing seat (26) is fixedly connected, and at the lower middle part, two guiding blocks (27) are fixedly connected. A screw rod (29) is installed and connected on one side of the fixing seat (26). A movable frame (28) is slidably connected to the two guiding blocks (27), and the screw rod (29) threadedly penetrates through the movable frame (28).

8. The semi-automatic welding machine according to claim 7, characterized in that: A fixing block (211) is fixedly connected to the top of the mounting bracket (21). One side of the upper end of the movable bracket (28) close to the fixing block (211) is rotatably connected to a connecting rod (212). The connecting rod (212) rotatably penetrates through the fixing block (211). A spiral groove (213) is formed in the connecting rod (212). A ball (216) is rollably installed inside the fixing block (211). The ball (216) is rollably arranged in the spiral groove (213).

9. The semi-automatic welding machine according to claim 8, characterized in that: The first welding head (214) and the second welding head (215) are respectively fixedly installed at one end of the connecting rod (212) and the movable bracket (28). The positions of the welding ends of the first welding head (214) and the second welding head (215) are on the same vertical line.

10. A method for a semi-automatic welding machine, characterized in that: A semi-automatic welding machine according to any one of claims 1 to 9, comprising the following steps: Welding fixation, The second workpiece (5) is sleeved on the two support rollers (25). The third motor (20) is started to drive the two support rollers (25) to move in a direction away from each other, and the second workpiece (5) is tightly pressed from the inside. One end of the first workpiece (4) is sleeved on a plurality of support frames (38). The first motor (32) is started to drive the second workpiece (5) and the mounting bracket (21) to move in a direction close to the first workpiece (4) until the second workpiece (5) abuts against one end of the first workpiece (4); Welding end position adjustment, The screw rod (29) is rotated to drive the movable bracket (28) to move outwards. The movable bracket (28) drives the first welding head (214) and the second welding head (215) to move synchronously. Through the cooperation of the ball (216) and the spiral groove (213), the connecting rod (212) drives the first welding head (214) to rotate. When the welding end of the first welding head (214) faces downwards, it stops rotating and moves horizontally following the connecting rod (212) and the movable bracket (28) until the connecting rod (212) abuts against the second workpiece (5). At this time, the first welding head (214) and the second welding head (215) move to the weld; Rotary welding, The second motor (36) is started to drive the first workpiece (4) and the second workpiece to rotate. The welding equipment is started to weld the first welding head (214) and the second welding head (215) until one-week welding is completed.

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