Automatic welding equipment and welding method

Abstract

The present invention belongs to the technical field of welding devices, and specifically relates to an automatic welding device and a welding method, including a frame, two clamping units, a bending device and a welding head, each clamping unit includes a sliding seat and a clamping mechanism for pressing a steel strip downward onto the top surface of the sliding seat; the bending device includes a mounting frame arranged on the frame, a bending plate telescopic member fixed on the mounting frame, and a bending plate arranged on the bending plate telescopic member, and the bending plate includes a vertical plate corresponding to the two clamping units one by one. The automatic welding equipment and welding method of the present invention replaces the cutting method of the steel strip end in the prior art with a bending method, and welds the bending area of ​​the steel strip during welding, and the deformation of the bending area is very small or even non-existent, so that the bending areas of the two steel strips can be aligned, and the welding quality is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of welding devices, and in particular relates to automatic welding equipment and a welding method. Background Art

[0002] Steel strip is a material with good strength, toughness and processability. It is used in various industries and daily life, such as packaging industry, machinery manufacturing industry, electronic and electrical industry, automobile industry, etc.

[0003] In the process of processing steel strips, welding equipment is one of the commonly used equipment. It is mainly used in application scenarios such as steel strip extension and broken repair. For example, when a longer steel strip is needed and the current single roll of steel strip is not long enough, welding equipment is needed to connect the two sections of steel strip. For example, if the steel strip is partially damaged during production, it is necessary to cut off the damaged part and then connect the steel strips on both sides by welding.

[0004] The Chinese patent with the authorization announcement number CN207873521U discloses an automatic welding device for a steel strip butt welding machine, including a welding table, a support frame is provided on the top of the welding table, two steel strip placement plates are slidably mounted on the support frame, two brackets are slidably mounted on the welding table, a cylinder is installed on the bracket, and a positioning block is installed on the cylinder through a rectangular plate and a column. When in use, the steel strip is first placed on the steel strip placement plate, and the positions of the two steel strip placement plates are adjusted; then the positions of the two brackets are adjusted, and after the adjustments are in place, the cylinder drives the positioning block to press the steel plate against the steel strip placement plate. Then welding is carried out, and the weld is polished after welding is completed.

[0005] In the prior art, the ends of the steel strips are usually irregular in shape, and the ends of the two steel strips need to be cut flush before welding, and then the cut ends of the two steel strips are joined together for welding. However, there is currently a situation where the ends of the two steel strips cannot be aligned, which affects the quality of the butt welding. The reason is that in the prior art, in order to avoid the welding head, the positioning block cannot be pressed on the end of the steel strip to be welded. During the movement of the welding head, the unwelded part is subjected to thermal stress and undergoes irregular deformation such as wavy shape. After the deformation, the ends of the two steel strips cannot be aligned. Summary of the invention

[0006] The present invention provides an automatic welding device to solve the technical problem in the prior art that the ends of two steel strips cannot be aligned, resulting in poor welding quality; and also provides a welding method to solve the above technical problem.

[0007] In order to solve the above problems, the automatic welding equipment provided by the present invention adopts the following technical solutions: an automatic welding equipment, comprising a frame, two clamping units arranged at intervals along the left-right direction, and a welding head slidably mounted on the frame along the front-back direction, each clamping unit comprises a sliding seat slidably mounted on the frame along the left-right direction, and a pressing mechanism arranged on the sliding seat and used to press the steel strip downward on the top surface of the sliding seat; the opposite side surfaces of the two sliding seats are both vertical surfaces and parallel to each other;

[0008] The automatic welding equipment also includes a bending device, which includes a mounting frame arranged on the frame, a bending plate telescopic member fixed on the mounting frame, and a bending plate arranged on the bending plate telescopic member, wherein the bending plate includes a vertical plate corresponding to the two clamping units one by one;

[0009] The sliding stroke of the clamping unit has a bending position and a clamping position. When in the bending position, the sliding seats of the two clamping units are spaced apart, and the ends of the two steel strips are passed between the two sliding seats in the left-right direction and are pressed downward by the clamping mechanism. The bending plate moves downward and bends the portion of the steel strip between the two sliding seats downward to form a material head; when in the clamping position, the sliding seats of the two clamping units approach each other and clamp the material heads of the two steel strips bent downward in the horizontal direction, and the welding head is used to weld the bending area of ​​the steel strip.

[0010] The beneficial effect is that the automatic welding equipment of the present invention replaces the cutting method of the steel strip end in the prior art by bending, and welds the bending area of ​​the steel strip during welding. In the extension direction of the steel strip, one side of the bending area is pressed by the clamping mechanism, and the material head on the other side is clamped by two sliding seats. Even if it is subjected to thermal stress during welding, the deformation of the bending area is very small or even no deformation, ensuring that the bending areas of the two steel strips can be aligned and the welding quality is guaranteed. Moreover, the material head is below the bending area, and during the welding process, the bending area is not easy to be welded through due to its thinness.

[0011] As a further improvement, the two clamping units are a first clamping unit and a second clamping unit arranged in sequence on the left and right; the sliding seat of the first clamping unit includes a sliding seat body, a clamping block slidably assembled on the sliding seat body, and the clamping block has a lower left limit position and an upper right limit position;

[0012] The automatic welding equipment includes a cutting device arranged on a sliding seat body, and the cutting device includes a cutting knife sliding in the left and right directions; when the clamping block is in the upper right limit position, the clamping block and the right side surface of the sliding seat body are flush, and the top surface of the clamping block cooperates with the clamping mechanism of the first clamping unit to clamp the steel belt; when the clamping block is in the lower left limit position, the clamping block avoids the cutting knife so that the cutting knife can move to the right and cut the welded material head.

[0013] By setting a cutting knife, the material head after welding can be cut off, reducing the workload of subsequent grinding. The cutting knife is set in the first clamping unit. The movement of the clamping block can make room for the cutting knife to move right. At the same time, the left movement of the cutting knife can also make room for the movement of the clamping block. The cutting knife is integrated into the first clamping unit, which has a higher degree of integration.

[0014] As a further improvement, a clamping block accommodating cavity is provided on the right side of the top of the sliding seat body, and the clamping block accommodating cavity has an inclined right cavity wall, and the bottom surface of the clamping block is an inclined surface that fits the right cavity wall.

[0015] As a further improvement, the left side of the clamping block is provided with a connecting groove extending up and down, the connecting groove includes a narrow groove part located on the left side and a wide groove part located on the right side, and a connecting block is installed in the wide groove part in a manner of guiding in the up and down direction and sliding in the left and right direction and in the front and back direction; the first clamping unit also includes a clamping block telescopic part, and the clamping block telescopic part is connected to the connecting block. The clamping block telescopic part only needs to be horizontally extended in the left and right direction to realize the inclined sliding of the clamping block, and the structure is simpler.

[0016] As a further improvement, a knife groove is provided on the sliding seat of the second clamping unit, and the knife groove is located on the left side of the sliding seat in the second clamping unit, and there is a gap between the knife groove and the top surface of the sliding seat in the second clamping unit; the knife groove is for the blade of the cutting knife to enter. There is a gap between the knife groove and the top surface of the sliding seat in the second clamping unit, which can prevent the cutting knife from cutting into the root of the material head, thereby reducing the difficulty of cutting.

[0017] As a further improvement, the automatic welding equipment includes a driving mechanism for driving the two clamping units to move synchronously relative to each other. The driving mechanism includes a driving block arranged on a sliding seat in the two clamping units, a screw rod, and a driving motor. Both driving blocks are provided with threaded holes for the screw rod to pass through. The rotation directions of the threaded holes on the two driving blocks are opposite. The driving motor is used to drive the screw rod to rotate.

[0018] As a further improvement, the frame includes a workbench and a gantry arranged on the top of the workbench, the gantry includes a first vertical frame and a second vertical frame fixed on the workbench, and a crossbeam installed on the first vertical frame and the second vertical frame, the mounting frame of the bending device is fixedly installed on the crossbeam, and the crossbeam is provided with vertical plate guide grooves corresponding to the two vertical plates one by one, and the vertical plate guide grooves are used to guide the up and down movement of the vertical plates.

[0019] As a further improvement, a welding head guide groove is provided on the cross beam, and the welding head guide groove is located between the two vertical plate guide grooves;

[0020] The welding head is slidably assembled in the welding head guide groove along the front-rear direction.

[0021] As a further improvement, adsorption structures for adsorbing the material heads are provided on the opposite sides of the sliding seats of the two clamping units. The adsorption structures are used to adsorb the material heads and make them fit on the sliding seats when the vertical plates bend the steel strips downward.

[0022] By providing an adsorption structure, it is ensured that the material head is in a vertical state after being bent, thereby ensuring that the material head will not be forced to move upward during the subsequent process of the two sliding seats approaching each other to clamp the material head.

[0023] As a further improvement, the adsorption structure is a magnet built into the sliding seat, and the side surface of the magnet is flush with the side surface of the sliding seat.

[0024] In order to solve the above problems, the welding method provided by the present invention adopts the following technical solution: a welding method, comprising the following steps:

[0025] 1) Drive the two clamping units to move and make the sliding seats of the two clamping units have a gap, pass the ends of the two steel belts between the two sliding seats in the left and right directions, and the clamping mechanism presses the steel belts downward on the top surface of the sliding seat;

[0026] 2) The bending plate moves downward, bending the portion of the steel strip between the two sliding seats downward to form a material head;

[0027] 3) The bending plate moves upward, driving the sliding seats of the two clamping units to approach each other and clamp the ends of the two steel strips, and the welding head welds the bending area of ​​the steel strip.

[0028] As a further improvement, after the steel strip is welded, a cutting knife is used to cut the welded material ends.

[0029] The beneficial effects of the present invention are:

[0030] 1. The automatic welding equipment and welding method of the present invention replace the cutting method of the steel strip ends in the prior art by bending. During welding, the bending area of ​​the steel strip is welded. Along the extension direction of the steel strip, one side of the bending area is pressed by a clamping mechanism, and the material head on the other side is clamped by two sliding seats. Even if it is subjected to thermal stress during welding, the deformation of the bending area is very small or even non-existent, ensuring that the bending areas of the two steel strips can be aligned and the welding quality is guaranteed. Moreover, the material head is below the bending area, and during the welding process, the bending area is not easy to be welded through due to its thinness.

[0031] 2. By setting a cutting knife, the material head after welding can be cut off, reducing the workload of subsequent grinding. The cutting knife is set in the first clamping unit. The movement of the clamping block can make room for the cutting knife to move right. At the same time, the left movement of the cutting knife can also make room for the movement of the clamping block. The cutting knife is integrated into the first clamping unit, which has a higher degree of integration.

[0032] 3. The clamping block telescopic member only needs to be horizontally extended and retracted in the left and right directions to realize the inclined sliding of the clamping block, and the structure is simpler.

[0033] 4. There is a gap between the knife groove and the top surface of the sliding seat in the second clamping unit, which can prevent the cutting knife from cutting into the root of the material head and reduce the difficulty of cutting.

[0034] 5. By setting up the adsorption structure, it is ensured that the material head is in a vertical state after being bent, thereby ensuring that the material head will not be forced to move upward when the two sliding seats approach each other to clamp the material head. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0036] Figure 1 It is a three-dimensional diagram of the automatic welding equipment;

[0037] Figure 2 It is the front view of the automatic welding equipment;

[0038] Figure 3 It is a three-dimensional diagram of a frame in an automatic welding device;

[0039] Figure 4 This is the main view of the frame in the automatic welding equipment;

[0040] Figure 5 It is a three-dimensional diagram of a first clamping unit and a cutting device in an automatic welding device combined together;

[0041] Figure 6 It is a front view of the first clamping unit and the cutting device in the automatic welding equipment combined together;

[0042] Figure 7 It is a top view of the first clamping unit and the cutting device in the automatic welding equipment combined together;

[0043] Figure 8 for Figure 7 Schematic diagram of the AA section;

[0044] Fig. 9 It is a stereoscopic diagram of the combination of the clamping block telescopic member and the connecting block in the first clamping unit;

[0045] Fig.10 is a three-dimensional diagram of the sliding seat body in the first clamping unit;

[0046] Fig.11is a top view of the sliding seat body in the first clamping unit;

[0047] Fig.12 for Fig.11 Schematic diagram of the middle BB section;

[0048] Fig.13 is a front view of a clamping block in a first clamping unit;

[0049] Fig.14 for Fig.13 Schematic diagram of the CC section;

[0050] Fig.15 for Fig.14 The enlarged view of point A in the middle;

[0051] Fig.16 is a three-dimensional diagram of a second clamping unit in an automatic welding device;

[0052] Fig.17 for Fig.16 The enlarged view of point B in the middle;

[0053] Fig.18 It is a structural schematic diagram of a bending device in an automatic welding device;

[0054] Fig.19 A schematic diagram of the structure of the cutting knife in the middle cutting device;

[0055] Fig. 20 This is a schematic diagram when the automatic welding equipment does not bend the steel strip;

[0056] Fig.21 This is a schematic diagram of the automatic welding equipment bending the steel strip;

[0057] Fig. 22 This is a schematic diagram of the automatic welding equipment clamping the head of the steel strip;

[0058] Fig.23 It is a schematic diagram of the structure of the second sliding seat in other embodiments of the automatic welding equipment.

[0059] Description of reference numerals:

[0060] 1. Frame; 101. Column; 102. Workbench; 103. Gantry; 104. Drop channel; 105. Sliding seat guide groove; 106. First frame; 107. Second frame; 108. Crossbeam; 109. Welding head guide groove; 110. Vertical plate guide groove;

[0061] 2. Bending device; 201. Mounting frame; 202. Bending plate telescopic member; 203. First vertical plate; 204. Second vertical plate; 205. Horizontal plate;

[0062] 3. Welding head;

[0063] 401, first clamping unit; 402, second clamping unit; 403, first sliding seat; 404, clamping block telescopic member; 405, sliding seat body; 406, clamping block; 407, first slider; 408, right cavity wall; 409, clamping block telescopic member accommodating groove; 410, cutting knife guide groove; 411, connecting rod perforation; 412, connecting member guide groove; 413, cutting knife telescopic member accommodating groove; 414, narrow groove portion; 415, wide groove portion; 416, connecting block; 417, first pressing plate; 418, first telescopic member; 419, second sliding seat; 420, second slider; 421, second pressing plate; 422, second telescopic member; 423, first driving block; 424, second driving block; 425, driving motor; 426, lead screw; 427, magnet mounting groove;

[0064] 501, cutting knife; 502, cutting knife telescopic member; 503, blade; 504, knife groove; 505, guide plate; 506, connecting plate; 507, connecting rod;

[0065] 6. Steel strip; 61. Material head;

[0066] 7. Magnet. DETAILED DESCRIPTION

[0067] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0068] Embodiments of the automatic welding equipment provided by the present invention:

[0069] like Figures 1 to 22 As shown, the automatic welding equipment includes a frame 1, a clamping device, a bending device 2, a welding device and a cutting device, and the clamping device, the bending device 2, the welding device and the cutting device are all installed on the frame 1. The clamping device is used to fix the two steel strips 6. The bending device 2 is used to bend one end of the two steel strips 6 to be welded downward, and the portion of the steel strips 6 bent downward is defined as the head 61. The welding device is used to weld the bending areas of the two steel strips 6 together. The cutting device cuts off the head 61 of the two steel strips 6 after welding.

[0070] like Figure 3 and Figure 4 As shown, the frame 1 serves as a mounting carrier for the clamping device, the bending device 2 , the welding device and the cutting device, and includes a column 101 , a workbench 102 , and a gantry 103 .

[0071] There are four columns 101 , and the four columns 101 are fixedly installed at the bottom of the workbench 102 to support the workbench 102 .

[0072] The workbench 102 is provided with a drop channel 104 extending forward and backward, and the drop channel 104 is for the material head 61 of the cut steel strip 6 to drop downward. The drop channel 104 is located in the middle of the left-right direction of the workbench 102. The workbench 102 is provided with two sliding seat guide grooves 105 on the left and right sides of the drop channel 104, respectively, and the two sliding seat guide grooves 105 on the same side in the left-right direction are arranged at intervals along the front-back direction.

[0073] The gantry 103 is fixedly installed on the workbench 102, and includes a first frame 106, a second frame 107 and a crossbeam 108, wherein the first frame 106 and the second frame 107 are arranged at intervals along the front-to-back direction, with the first frame 106 in the front and the second frame 107 in the back, and the crossbeam 108 is fixedly installed on the top of the first frame 106 and the second frame 107. The first frame 106 is a frame-type structure, which reduces weight and facilitates observation of welding conditions.

[0074] The cross beam 108 is provided with a welding head guide groove 109 and a vertical plate guide groove 110, both of which extend in the front-rear direction, and the welding head guide groove 109 is located in the middle of the cross beam 108 in the left-right direction, and is directly opposite to the drop channel 104 in the upper and lower directions. There are two vertical plate guide grooves 110, which are respectively arranged on the left and right sides of the welding head guide groove 109.

[0075] like Figures 1 to 17 as well as Fig. 20 , Fig.21 and Fig. 22 As shown, the clamping device is assembled on the workbench 102, and includes a first clamping unit 401, a second clamping unit 402 and a driving mechanism. The first clamping unit 401 and the second clamping unit 402 can independently press the steel strip 6 in the up and down directions, and at the same time, when the first clamping unit 401 and the second clamping unit 402 are close to each other, they can clamp the material heads 61 of the two steel strips 6. The driving mechanism is used to drive the first clamping unit 401 and the second clamping unit 402 to move synchronously to achieve mutual approach and distance.

[0076] The first clamping unit 401 is located on the left side of the falling channel 104 , and includes a first sliding seat 403 , a first pressing mechanism, and a clamping block telescopic member 404 .

[0077] The first sliding seat 403 is a split structure, including a sliding seat body 405 and a clamping block 406 .

[0078] The sliding seat body 405 includes two first sliders 407 at the bottom. The two first sliders 407 correspond to the two sliding seat guide grooves 105 on the left side. The first sliders 407 are slidably assembled in the two sliding seat guide grooves 105 on the left side along the left-right direction.

[0079] The top surface and the right side surface of the sliding seat body 405 are both planes, the top surface extends horizontally, and the right side surface extends vertically. A clamping block accommodating cavity is provided on the right side of the top of the sliding seat body 405, and the clamping block accommodating cavity is used to accommodate the clamping block 406. The clamping block accommodating cavity has an inclined right cavity wall 408, and specifically, the right cavity wall 408 is inclined from left to right and upward. Clamping block telescopic member accommodating grooves 409 are respectively provided on the front and rear side surfaces of the sliding seat body 405, and the clamping block telescopic member accommodating grooves 409 are connected to the clamping block accommodating cavity, and the clamping block telescopic member accommodating grooves 409 are used to accommodate the clamping block telescopic member 404.

[0080] The top surface of the sliding seat body 405 is also provided with an L-shaped groove that passes through from front to back. The L-shaped groove is connected to the clamping block accommodating cavity, and the bottom surface of the L-shaped groove is provided with a cutting knife guide groove 410 extending left and right. A plurality of connecting rod through holes 411 are provided on the left groove wall of the L-shaped groove.

[0081] A connecting component guide groove 412 and a cutting blade telescopic component accommodating groove 413 are further provided in the sliding seat body 405 . The cutting blade telescopic component accommodating groove 413 is located on the left side of the connecting component guide groove 412 .

[0082] The clamping block 406 is slidably assembled in the clamping block accommodating cavity in the left-right direction. The top surface and right side surface of the clamping block 406 are both planes. The top surface of the clamping block 406 extends horizontally, and the right side surface of the clamping block 406 extends vertically. The bottom surface of the clamping block 406 is an inclined surface, and its inclination direction and angle are consistent with the inclination direction and angle of the right cavity wall 408 of the clamping block accommodating cavity. The bottom surface of the clamping block 406 and the right cavity wall 408 are in contact with each other.

[0083] The travel of the clamping block telescopic member 404 driving the clamping block 406 to move left and right has two limit positions, namely the lower left limit position and the upper right limit position. When the clamping block 406 is at the upper right limit position, the right side surface of the clamping block 406 is flush with the right side surface of the sliding seat body 405, the top surface of the clamping block 406 is flush with the top surface of the sliding seat body 405, and there is a gap between the top surface of the clamping block 406 and the top surface of the sliding seat body 405 in the left and right directions; when the clamping block 406 is at the lower left limit position, the top surface of the clamping block 406 is lower than the top surface of the sliding seat body 405, and the right side surface of the clamping block 406 is located on the left side of the right side surface of the sliding seat body 405.

[0084] A connecting groove extending up and down is provided on the left side of the clamping block 406, and the connecting groove includes a narrow groove portion 414 on the left and a wide groove portion 415 on the right. In the front-to-back direction, the groove width of the narrow groove portion 414 is smaller than the groove width of the wide groove portion 415. There are two connecting grooves arranged in a front-to-back spacing.

[0085] There are two clamping block telescopic members 404 arranged at intervals in front and back, and the two clamping block telescopic members 404 are respectively fixedly installed in two clamping block telescopic member accommodating grooves 409. The piston rod of the clamping block telescopic member 404 extends to the right, and a connecting block 416 is fixedly installed on the piston rod. The piston rod of the clamping block telescopic member 404 passes through the narrow groove part 414, and the connecting block 416 is located in the wide groove part 415 of the connecting groove, and the width of the connecting block 416 in the left-right and front-back directions is consistent with the width of the wide groove part 415 in the left-right and front-back directions, so that the connecting block 416 slides in the up-down direction and is assembled in the wide groove part 415 with upper limit in the left-right and front-back directions.

[0086] When the clamping block telescopic member 404 is extended, the clamping block 406 can be driven to move to the upper right, and when the clamping block telescopic member 404 is retracted, the clamping block 406 can be driven to move to the lower left.

[0087] The function of the first clamping mechanism is to press the steel belt 6 downward onto the first sliding seat 403 when the clamping block 406 is at the upper right limit position, specifically, onto the top surface of the clamping block 406. The first clamping mechanism includes a first pressing plate 417 and two first telescopic members 418, the two first telescopic members 418 are respectively fixedly mounted on the front and rear sides of the sliding seat body 405, the first pressing plate 417 is fixedly mounted on the telescopic ends of the two first telescopic members 418, and the two first telescopic members 418 can press the first pressing plate 417 onto the first sliding seat 403 when they are retracted. The right side surface of the first pressing plate 417 is close to the right side surface of the first sliding seat 403, but there is a distance between the first pressing plate 417 and the right side surface of the first sliding seat 403 in the left-right direction.

[0088] The second clamping unit 402 is located on the right side of the falling channel 104 and includes a second sliding seat 419 and a second pressing mechanism.

[0089] The second sliding seat 419 includes two second sliding blocks 420 located at the bottom, and the two second sliding blocks 420 correspond one-to-one to the two sliding seat guide grooves 105 on the right side.

[0090] The second sliding seat 419 has a vertically extending left side surface, which is parallel to the right side surface of the first sliding seat 403 and is used to clamp the material head 61 of the steel strip 6 together.

[0091] The second pressing mechanism includes a second pressing plate 421 and two second telescopic members 422. The two second telescopic members 422 are respectively fixedly mounted on the front and rear sides of the second sliding seat 419. The second pressing plate 421 is fixedly mounted on the telescopic ends of the two second telescopic members 422. When the two second telescopic members 422 are retracted, the second pressing plate 421 can be pressed against the second sliding seat 419. The left side surface of the second pressing plate 421 is close to the left side surface of the second sliding seat 419, but there is a distance between the left side surface of the second sliding seat 419 and the left side surface of the second sliding seat 419 in the left-right direction.

[0092] The function of the driving mechanism is to drive the first clamping unit 401 and the second clamping unit 402 to move synchronously, so as to achieve relative proximity and mutual distance. The driving mechanism includes a first driving block 423, a second driving block 424, a driving motor 425, and a screw rod 426. The first driving block 423 is fixedly mounted on the front side of the first sliding seat 403, and the second driving block 424 is fixedly mounted on the front side of the second sliding seat 419. The first driving block 423 and the second driving block 424 are both provided with threaded holes that pass through the left and right sides, and the threaded holes of the first driving block 423 and the second driving block 424 have opposite rotation directions. The driving motor 425 is fixedly mounted on the workbench 102, and the screw rod 426 is connected to the driving motor 425. The screw rod 426 has two thread segments with different rotation directions, one of which penetrates into the first driving block 423, and the other thread segment penetrates into the second driving block 424. After the driving motor 425 is started, it can drive the first clamping unit 401 and the second clamping unit 402 to move closer to and away from each other through the screw rod 426.

[0093] like Figure 1 , Figure 2 and Fig.18 As shown, the bending device 2 includes a mounting frame 201, a bending plate telescopic member 202, and a bending plate. The mounting frame 201 is fixedly mounted on the crossbeam 108 of the frame 1, and the mounting frame 201 is a U-shaped frame with an opening facing downward. The bending plate telescopic member 202 is fixedly mounted on the mounting frame 201. The bending plate includes a first vertical plate 203 and a second vertical plate 204 arranged at intervals on the left and right, and a horizontal plate 205 connecting the tops of the first vertical plate 203 and the second vertical plate 204, and the horizontal plate 205 is connected to the bending plate telescopic member 202; the first vertical plate 203 is located on the left side of the second vertical plate 204. The two vertical plates correspond to the two vertical plate guide grooves 110 one by one, and the vertical plates pass through the vertical plate guide grooves 110, and the vertical plate guide grooves 110 guide the vertical plates to move up and down.

[0094] The welding device includes a welding head 3, which is slidably assembled in the welding head guide groove 109 along the front-back direction, and the lower end of the welding head 3 passes downward through the welding head guide groove 109. The welding device also includes a mechanism for driving the welding head 3 to move forward and backward, such as a screw nut mechanism.

[0095] like Figures 5 to 19As shown, the cutting device includes a cutting blade 501, a cutting blade telescopic member 502 and a connecting member.

[0096] The right side of the cutting knife 501 has a blade 503, which is located below the top surface of the cutting knife 501. Correspondingly, a knife groove 504 is provided on the second sliding seat 419, and there is a distance between the knife groove 504 and the top surface of the second sliding seat 419. The knife groove 504 and the blade 503 are located at the same height. When in use, the blade 503 cuts the material head 61 of the steel strip 6 and then cuts into the knife groove 504. The top surface of the cutting knife 501 and the top surface of the first sliding seat 403 are at the same horizontal height.

[0097] The left side of the cutting blade 501 has a guide plate 505 bent downward, and the guide plate 505 is guided and assembled in the cutting blade guide groove 410 of the first sliding seat 403 along the left-right direction.

[0098] The telescopic cutter member 502 is fixedly mounted in the telescopic cutter member receiving groove 413 of the sliding seat body 405 .

[0099] The connecting component includes a connecting plate 506 located on the left side and a plurality of connecting rods 507 fixedly mounted on the connecting plate 506. The connecting plate 506 is fixed on the telescopic rod of the telescopic cutter member 502. The connecting plate 506 is guided and slidably assembled in the connecting component guide groove 412 along the left and right directions. The plurality of connecting rods 507 are arranged at intervals along the front and back directions. The left end of the connecting rod 507 is fixedly connected to the connecting plate 506, and the right end of the connecting rod 507 passes through the connecting rod through hole 411 and is connected to the guide plate 505.

[0100] When the clamping block 406 slides to the lower left, it can make room on the right side of the cutting knife 501, and the cutting knife 501 can move to the right. When the first sliding seat 403 and the second sliding seat 419 cooperate to clamp the material head 61, the cutting knife 501 retracts to make room for the clamping block 406 to move to the upper right.

[0101] Fig. 20 , Fig.21 and Fig. 22 It is a schematic diagram.

[0102] In the initial state, the cutting knife telescopic member 502 drives the cutting knife 501 to move to the left, and the clamping block telescopic member 404 pushes the clamping block 406 to the upper right limit position. The right side surface of the clamping block 406 is flush with the right side surface of the sliding seat body 405, and the top surface of the clamping block 406 is flush with the top surface of the sliding seat body 405. First, the positions of the first sliding seat 403 and the second sliding seat 419 are adjusted. Specifically, after the driving motor 425 is started, it drives the first sliding seat 403 and the second sliding seat 419 to move relative to each other. Fig. 20As shown, after the first sliding seat 403 and the second sliding seat 419 are adjusted into place, the first sliding seat 403 is located on the left side of the first vertical plate 203, and the second sliding seat 419 is located on the right side of the second vertical plate 204, wherein the right side surface of the first sliding seat 403 is located on the left side of the left side surface of the first vertical plate 203, and the distance between the two in the left-right direction is the thickness of the steel belt 6; the left side surface of the second sliding seat 419 is located on the right side of the right side surface of the second vertical plate 204, and the distance between the two in the left-right direction is the thickness of the steel belt 6.

[0103] In the initial state, there is a gap between the first pressing plate 417 and the first sliding seat 403, and there is a gap between the second pressing plate 421 and the second sliding seat 419. At this time, the first clamping unit 401 and the second clamping unit 402 are both in the bending position. The two steel belts 6 are respectively inserted between the first pressing plate 417 and the first sliding seat 403 and between the second pressing plate 421 and the second sliding seat 419, and the ends of the steel belts 6 extend to between the first sliding seat 403 and the second sliding seat 419. Then, the first pressing plate 417 moves downward to press the steel belt 6 against the first sliding seat 403, and the second pressing plate 421 moves downward to press the steel belt 6 against the second sliding seat 419. Then, the bending plate telescopic member 202 is started to drive the first vertical plate 203 and the second vertical plate 204 to move downward. The first vertical plate 203 and the second vertical plate 204 press the end of the steel strip 6 downward, so that the end of the steel strip 6 is bent downward to form a material head 61. The material head 61 is located between the first sliding seat 403 and the second sliding seat 419. Fig.21 Then, the bending plate telescopic member 202 drives the first vertical plate 203 and the second vertical plate 204 to move upward, and the driving mechanism drives the first sliding seat 403 and the second sliding seat 419 to move closer to each other, and the material heads 61 of the two steel strips 6 are clamped together by the right side of the first sliding seat 403 and the left side of the second sliding seat 419. At this time, the first clamping unit 401 and the second clamping unit 402 are both in the clamping position, as shown in FIG. Fig. 22 shown.

[0104] At this time, the bent portion of the steel strip 6 is the area to be welded, one side of the area to be welded is pressed by the first pressing plate 417 and the second pressing plate 421, and the other side is clamped by the first sliding seat 403 and the second sliding seat 419, so that it cannot be deformed during welding. Then the welding head 3 moves forward and backward to weld the areas to be welded of the two steel strips 6.

[0105] After welding is completed, the clamping block telescopic member 404 drives the clamping block 406 to move to the lower left to clear the area on the right side of the cutting knife 501. Then, the cutting knife telescopic member 502 drives the cutting knife 501 to move rightward to cut the material head 61 of the steel strip 6, and the material head 61 falls downward through the drop channel 104. After that, the first pressing plate 417 and the second pressing plate 421 release the steel strip 6, and the driving mechanism drives the first sliding seat 403 and the second sliding seat 419 to separate, take out the welded steel strip 6, and grind the welding position of the steel strip 6.

[0106] It should be noted that in actual use, after the material head 61 is bent and the first vertical plate 203 and the second vertical plate 204 move upward, the material head 61 will rebound upward to a certain extent, and then the material head 61 will be clamped by the first sliding seat 403 and the second sliding seat 419.

[0107] In other embodiments, an adsorption structure is fixedly mounted on the right side of the first sliding seat 403 and the left side of the second sliding seat 419, and the adsorption structure here is a magnet 7. Specifically, taking the second sliding seat 419 as an example, Fig.23 As shown, a row of multiple magnet mounting grooves 427 are provided on the left side of the second sliding seat 419, and a magnet 7 is fixedly mounted in the magnet mounting groove 427. Specifically, the bottom of the magnet 7 can be fixedly mounted in the magnet mounting groove 427 by gluing or other methods. When in use, the material head 61 is bent downward and adsorbed by the magnet 7 and maintained in a vertical state. In other embodiments, the adsorption structure can be a negative pressure suction hole, which is connected to a negative pressure suction machine to adsorb the material head 61 by negative pressure suction.

[0108] In other embodiments, the cutting device can be eliminated, and after welding is completed, the material head 61 is cut and removed by a cutting device. In this case, the first sliding seat 403 can be an integrated structure.

[0109] Embodiment of the welding method provided by the present invention:

[0110] The welding method of this embodiment adopts the above-mentioned automatic welding equipment and includes the following steps:

[0111] 1) Drive the two clamping units to move and make the sliding seats of the two clamping units have a gap, pass the ends of the two steel belts 6 between the two sliding seats in the left and right directions, and the clamping mechanism presses the steel belts 6 downward on the top surface of the sliding seat;

[0112] 2) The bending plate moves downward to bend the portion of the steel strip 6 between the two sliding seats downward to form a material head 61;

[0113] 3) The bending plate moves upward, driving the sliding seats of the two clamping units to approach each other and clamp the material heads 61 of the two steel strips 6, and the welding head 3 welds the bending area of ​​the steel strips.

[0114] After the steel strip 6 is welded, the material head 61 of the welded end is cut off with a cutting knife 501 .

[0115] In other embodiments, after the steel strip 6 is welded, the material head 61 can be ground off by grinding.

[0116] In addition, in the description of this specification, “plurality” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

Claims

1. An automatic welding device, comprising a frame, two clamping units spaced apart in the left-right direction, and a welding head slidably mounted on the frame in the front-back direction, each clamping unit comprising a sliding seat slidably mounted on the frame in the left-right direction, and a pressing mechanism disposed on the sliding seat and used to press the steel strip downward onto the top surface of the sliding seat; characterized in that: The opposite side surfaces of the two sliding seats are both vertical surfaces and parallel to each other; The automatic welding equipment also includes a bending device, which includes a mounting frame arranged on the frame, a bending plate telescopic member fixed on the mounting frame, and a bending plate arranged on the bending plate telescopic member, wherein the bending plate includes a vertical plate corresponding to the two clamping units one by one; The sliding stroke of the clamping unit has a bending position and a clamping position. When in the bending position, the sliding seats of the two clamping units are spaced apart, the ends of the two steel strips are passed between the two sliding seats in the left-right direction and are pressed downward by the clamping mechanism, the bending plate moves downward and bends the portion of the steel strip between the two sliding seats downward to form a material head; when in the clamping position, the sliding seats of the two clamping units approach each other and clamp the material heads of the two steel strips bent downward in the horizontal direction, and the welding head is used to weld the bending area of ​​the steel strip; The two clamping units are a first clamping unit and a second clamping unit arranged in sequence on the left and right; the sliding seat of the first clamping unit includes a sliding seat body and a clamping block slidably assembled on the sliding seat body, and the clamping block has a lower left limit position and an upper right limit position; The automatic welding equipment includes a cutting device arranged on a sliding seat body, and the cutting device includes a cutting knife sliding in the left and right directions; when the clamping block is in the upper right limit position, the clamping block and the right side surface of the sliding seat body are flush, and the top surface of the clamping block cooperates with the clamping mechanism of the first clamping unit to clamp the steel belt; when the clamping block is in the lower left limit position, the clamping block avoids the cutting knife so that the cutting knife can move to the right and cut the welded material head.

2. The automatic welding equipment according to claim 1, characterized in that: A clamping block accommodating cavity is provided on the right side of the top of the sliding seat body. The clamping block accommodating cavity has an inclined right cavity wall. The bottom surface of the clamping block is an inclined surface that fits the right cavity wall.

3. The automatic welding equipment according to claim 2, characterized in that: A connecting groove extending up and down is provided on the left side of the clamping block, and the connecting groove includes a narrow groove part located on the left side and a wide groove part located on the right side. A connecting block is installed in the wide groove part so as to be guided along the up and down directions and to be limitedly slidable along the left and right directions and the front and back directions; the first clamping unit also includes a clamping block telescopic part, which is connected to the connecting block.

4. The automatic welding equipment according to claim 1, characterized in that: The sliding seat of the second clamping unit is provided with a knife groove, which is located on the left side of the sliding seat in the second clamping unit and has a distance from the top surface of the sliding seat in the second clamping unit; the knife groove is for the blade of the cutting knife to enter.

5. The automatic welding equipment according to any one of claims 1 to 4, characterized in that: The automatic welding equipment includes a driving mechanism for driving two clamping units to move synchronously relative to each other. The driving mechanism includes a driving block arranged on a sliding seat in the two clamping units, a screw rod, and a driving motor. Both driving blocks are provided with threaded holes for the screw rod to pass through. The rotation directions of the threaded holes on the two driving blocks are opposite. The driving motor is used to drive the screw rod to rotate.

6. The automatic welding equipment according to any one of claims 1 to 4, characterized in that: Adsorption structures for adsorbing the material heads are arranged on opposite sides of the sliding seats of the two clamping units. The adsorption structures are used to adsorb the material heads and make the material heads fit on the sliding seats when the vertical plates bend the steel strips downwards.

7. The automatic welding equipment according to claim 6, characterized in that: The adsorption structure is a magnet built into the sliding seat, and the side surface of the magnet is flush with the side surface of the sliding seat.

8. A welding method, characterized in that: The automatic welding equipment according to claim 1 comprises the following steps: 1) Drive the two clamping units to move and make the sliding seats of the two clamping units have a gap, pass the ends of the two steel belts between the two sliding seats in the left and right directions, and the clamping mechanism presses the steel belts downward on the top surface of the sliding seat; 2) The bending plate moves downward, bending the portion of the steel strip between the two sliding seats downward to form a material head; 3) The bending plate moves upward, driving the sliding seats of the two clamping units to approach each other and clamp the ends of the two steel strips, and the welding head welds the bending area of ​​the steel strip.

9. The welding method according to claim 8, characterized in that: After the steel strip is welded, use a cutting knife to cut the welded material.

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