A thin steel plate welding and forming device

Abstract

The present invention discloses a thin steel plate welding and forming device, which relates to the technical field of machining. The thin steel plate welding and forming device includes a machine base, a rolling mechanism and a seam maintaining mechanism arranged on the machine base. The seam maintaining mechanism includes a seam base and a seam plate slidably arranged on the seam base. The opposite sides of the seam plate are a flat surface and an inclined surface respectively. The head and the tail of the blank after being rolled by the rolling mechanism are respectively located on the opposite sides of the seam plate. Pressing the blank can drive the head and the tail of the blank to approach each other, so that the head of the blank abuts against the flat surface and the tail of the blank abuts against the inclined surface, forcing the seam plate to slide relative to the seam base until the head and the tail of the blank are in close contact. The thin steel plate welding and forming device can solve the product quality problems caused by the difficult fixation of the seam trajectory in the existing device, thereby improving the product quality of the hoop product.

Description

Technical Field

[0001] The present invention relates to the technical field of machining, and more particularly, to a thin steel plate welding and forming device. Background Art

[0002] As a new type of cement product, concrete pipe piles are widely used in various infrastructure construction projects. In order to facilitate the connection of concrete pipe piles, both ends thereof need to be wrapped and protected by hoop fasteners. Such hoop fasteners are generally made by coiling and welding a hoop strip with a length of 1.4 - 1.6 mm. During welding, it is required that the weld seam is tight and there is no missed welding, and the edges of the blank of the obtained hoop fastener product need to be aligned.

[0003] Currently, the existing equipment in the industry has problems such as unstable product quality, low qualified rate and high scrap rate. The product quality problems are mainly manifested in the welding process of the blank. The actual position of the seam formed between the head and the tail of the blank has great randomness and is difficult to coincide with the pre-set welding torch trajectory, resulting in offset welding, which causes direct cracking during the subsequent over-pressing process and leads to waste materials. Summary of the Invention

[0004] The purpose of the present invention is to provide a thin steel plate welding and forming device, which can solve the product quality problems caused by the difficult-to-fix seam trajectory of the existing equipment, thereby improving the product quality of the hoop fastener product.

[0005] The embodiments of the present invention are implemented as follows:

[0006] The embodiment of the present invention provides a thin steel plate welding and forming device, including a machine base and a coiling mechanism and a seam maintaining mechanism arranged on the machine base. The seam maintaining mechanism includes a seam base and a seam plate slidably arranged on the seam base. The opposite sides of the seam plate are a plane and an inclined plane respectively. The head and the tail of the blank coiled by the coiling mechanism are respectively located on the opposite sides of the seam plate. Pressing the blank can drive the head and the tail of the blank to approach each other, so that the head of the blank abuts against the plane and the tail of the blank abuts against the inclined plane, forcing the seam plate to slide relative to the seam base until the head and the tail of the blank are in close contact. This thin steel plate welding and forming device can solve the product quality problems caused by the difficult-to-fix seam trajectory of the existing equipment, thereby improving the product quality of the hoop fastener product.

[0007] Optionally, it further includes a welding mechanism arranged on the machine base. The welding mechanism includes a displacement table and a welding torch fixedly arranged on the displacement table. The displacement table is used to drive the welding torch to move relative to the machine base, so that the orthographic projection of the welding torch on the machine base coincides with the orthographic projection of the plane on the machine base.

[0008] Optionally, the curling mechanism includes a curling base, a lifting plate and a supporting wedge that are slidably arranged on the curling base. A rolling member and two first bearing seats are arranged on the lifting plate. A curling roller is installed between the two first bearing seats. The supporting wedge abuts against the rolling member. The supporting wedge is driven to slide relative to the curling base, so that the rolling member rolls along the inclined surface of the supporting wedge, forcing the lifting plate to slide relative to the curling base to correspondingly adjust the vertical height of the curling roller.

[0009] Optionally, the curling mechanism further includes two mounting rods fixedly arranged on the curling base. An elastic member is sleeved on each mounting rod. Two ends of the elastic member are respectively connected to the curling base and the lifting plate.

[0010] Optionally, it further includes a feeding mechanism and a material pushing mechanism arranged on the machine base. The feeding mechanism is used to convey the blank fed into the thin steel plate welding and forming equipment to the curling mechanism for curling, and convey the head of the blank after curling by the curling mechanism to the side where the plane is located. The material pushing mechanism is used to push the tail of the blank toward the side close to the head to the side where the inclined surface is located.

[0011] Optionally, the material pushing mechanism includes two second bearing seats slidably arranged on the machine base. A bearing is installed between the two second bearing seats. A material pushing fork is fixedly arranged on the bearing. The bearing is driven to rotate relative to the second bearing seat, and can drive the material pushing fork to rotate toward the side close to the seam holding mechanism.

[0012] Optionally, it further includes a left material stop mechanism, a right material stop mechanism and an upper material stop mechanism arranged on the machine base. The left material stop mechanism and the right material stop mechanism are respectively used to abut against the left and right sides of the blank. The upper material stop mechanism is used to abut against the top of the blank and press the blank.

[0013] Optionally, it further includes a seam joining mechanism and a liftable material stop mechanism arranged on the machine base. The seam joining mechanism includes a slide rail base and a push plate slidably arranged on the slide rail base. The push plate is driven to slide relative to the slide rail base, and can drive the blank to move toward the side close to the liftable material stop mechanism, so that the seam joining mechanism and the liftable material stop mechanism respectively abut against the front and rear sides of the blank.

[0014] Optionally, the seam joining mechanism further includes a vertical slide table fixedly arranged on the slide rail base and two laminating plates slidably arranged on the vertical slide table. The two laminating plates are respectively located on opposite sides of the seam holding mechanism. The laminating plates are driven to press the head and tail of the blank on the machine base.

[0015] Optionally, the thickness of the blank is t, and the distances between the laminate and the top surface of the machine base and between the seam base and the top surface of the machine base are both d, and the relational expression is satisfied: t < d < 2t.

[0016] The beneficial effects of the embodiments of the present invention include:

[0017] The thin steel plate welding and forming equipment includes a machine base, a rolling mechanism and a seam holding mechanism arranged on the machine base. The seam holding mechanism includes a seam base and a seam plate slidably arranged on the seam base. The opposite sides of the seam plate are a plane and an inclined plane respectively. In the natural state, the end of the seam plate close to the machine base extends out of the seam base. The head and tail of the blank after being rolled by the rolling mechanism are respectively located on the opposite sides of the seam plate. Pressing the blank can drive the head and tail of the blank to approach each other, so that the head of the blank abuts against the plane and the tail of the blank abuts against the inclined plane, forcing the seam plate to slide relative to the seam base toward the side away from the machine base until the end of the seam plate close to the machine base retracts into the seam base. At this time, the head and tail of the blank are no longer separated by the seam plate and can be in close contact with each other. Since the head and tail of the blank can converge at the orthographic projection of the plane on the machine base, when the hoop product is processed by using this thin steel plate welding and forming equipment, the actual position of the seam formed between the head and tail of the blank is always fixed, so that the seam trajectory can coincide with the preset welding torch trajectory to avoid deviation welding, effectively improving the product quality of the hoop product. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 One of the structural schematic diagrams of the thin steel plate welding and forming equipment provided by the embodiments of the present invention;

[0020] Figure 2 Another structural schematic diagram of the thin steel plate welding and forming equipment provided by the embodiments of the present invention;

[0021] Figure 3 For Figure 2 The cross-sectional view at A-A in

[0022] Figure 4 The structural schematic diagram of the first pinch roller group provided by the embodiments of the present invention;

[0023] Figure 5Schematic diagram of the pressing roller assembly provided by an embodiment of the present invention;

[0024] Figure 6 One of the schematic diagrams of the curling mechanism provided by an embodiment of the present invention;

[0025] Figure 7 Another schematic diagram of the curling mechanism provided by an embodiment of the present invention;

[0026] Figure 8 One of the schematic diagrams of the material feeding mechanism provided by an embodiment of the present invention;

[0027] Figure 9 Another schematic diagram of the material feeding mechanism provided by an embodiment of the present invention;

[0028] Figure 10 Schematic diagram of the left material stop mechanism provided by an embodiment of the present invention;

[0029] Figure 11 Schematic diagram of the right material stop mechanism provided by an embodiment of the present invention;

[0030] Figure 12 Schematic diagram of the upper material stop mechanism provided by an embodiment of the present invention;

[0031] Figure 13 One of the schematic diagrams of the edge joining mechanism, seam holding mechanism and welding mechanism provided by an embodiment of the present invention;

[0032] Figure 14 is Figure 13 Partial enlarged view at position B in

[0033] Figure 15 Another schematic diagram of the edge joining mechanism, seam holding mechanism and welding mechanism provided by an embodiment of the present invention;

[0034] Figure 16 Another schematic diagram of the edge joining mechanism, seam holding mechanism and welding mechanism provided by an embodiment of the present invention;

[0035] Figure 17 is Figure 16 Cross-sectional view taken along C-C in

[0036] Figure 18 Schematic diagram of the seam plate provided by an embodiment of the present invention;

[0037] Figure 19 Schematic diagram of the liftable material stop mechanism provided by an embodiment of the present invention.

[0038] Icons: 10 - base; 11 - middle cover plate; 20 - feeding mechanism; 21 - first pinch roller group; 211 - motor reducer; 212 - pinch roller; 213 - sprocket; 214 - first mounting seat; 22 - second pinch roller group; 23 - pressing roller assembly; 231 - first cylinder; 232 - pressing roller; 233 - locking nut; 234 - fixing seat; 235 - second mounting seat; 24 - first guide plate; 25 - second guide plate; 30 - curling mechanism; 31 - curling base; 31a - first guide rail; 31b - second guide rail; 32 - lifting plate; 321 - rolling element; 322 - first bearing seat; 323 - curling roller; 33 - supporting wedge; 331 - ball nut; 332 - screw rod; 333 - first handwheel; 34 - mounting rod; 341 - elastic member; 342 - connecting support; 40 - material pushing mechanism; 41 - cylinder connecting seat; 42 - second bearing seat; 43 - bearing; 431 - material pushing fork; 44 - second cylinder; 45 - third cylinder; 46 - gear; 47 - rack; 48 - microswitch; 50 - left material stop mechanism; 51 - first base; 52 - third guide rail; 53 - left baffle; 54 - first motor; 55 - first synchronous belt drive assembly; 56 - first lead screw slider assembly; 60 - right material stop mechanism; 61 - second base; 62 - fourth guide rail; 63 - right baffle; 64 - second handwheel; 65 - second lead screw slider assembly; 66 - connecting seat; 70 - upper material stop mechanism; 71 - second motor; 72 - third lead screw slider assembly; 73 - upper baffle; 74 - adjustable baffle; 80 - seam joining mechanism; 81 - slide rail base; 82 - push plate; 821 - third motor; 822 - second synchronous belt drive assembly; 823 - fourth lead screw slider assembly; 83 - vertical slide table; 84 - laminate; 841 - connecting bracket; 90 - seam maintaining mechanism; 91 - seam base; 92 - seam plate; 921 - plane; 922 - inclined plane; α - inclination angle; 93 - fourth cylinder; 100 - welding mechanism; 101 - welding base; 102 - displacement table; 103 - welding torch; 110 - liftable material stop mechanism; 111 - third base; 112 - front baffle; 113 - fifth cylinder; 114 - connecting plate; 115 - third guide plate. Detailed implementation manners

[0039] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0040] Accordingly, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0041] It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

[0042] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0043] In addition, the terms "horizontal", "vertical", etc. do not mean that the components are required to be absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly inclined.

[0044] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the connection inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] Please refer to Figures 1 to 3, an embodiment of the present application provides a thin steel plate welding and forming device, which includes a machine base 10 and a feeding mechanism 20, a rolling mechanism 30, a material pushing mechanism 40, a left material blocking mechanism 50, a right material blocking mechanism 60, an upper material blocking mechanism 70, a seam joining mechanism 80, a seam maintaining mechanism 90, a welding mechanism 100 and a liftable material blocking mechanism 110 arranged on the machine base 10. In the specific processing process of preparing a hoop product by using this thin steel plate welding and forming device, first, the blank fed into this thin steel plate welding and forming device is conveyed to the rolling mechanism 30 by the feeding mechanism 20 for rolling. Then, the head of the blank after being rolled by the rolling mechanism 30 continues to be conveyed to one side of the seam maintaining mechanism 90 by the feeding mechanism 20, while the tail of the blank is pushed by the material pushing mechanism 40 towards the side close to the head. Immediately afterwards, the tail of the blank is further pushed towards the other side of the seam maintaining mechanism 90 by the left material blocking mechanism 50. At this time, in the circumferential direction of the blank, the blank is surrounded by the left material blocking mechanism 50, the right material blocking mechanism 60, the upper material blocking mechanism 70 and the machine base 10. In the axial direction of the blank, the blank is surrounded by the seam joining mechanism 80 and the liftable material blocking mechanism 110. And the head and tail of the blank are respectively located on the opposite sides of the seam maintaining mechanism 90.

[0046] As Figure 17 and Figure 18 shown, the seam maintaining mechanism 90 includes a seam base 91 and a seam plate 92 slidably arranged on the seam base 91. The opposite sides of the seam plate 92 are respectively a flat surface 921 and an inclined surface 922. The head and tail of the blank after being rolled by the rolling mechanism 30 are respectively located on the opposite sides of the seam plate 92. Pressing the blank can drive the head and tail of the blank to approach each other, so that the head of the blank abuts against the flat surface 921, the tail of the blank abuts against the inclined surface 922, forcing the seam plate 92 to slide relative to the seam base 91 until the head and tail of the blank are in close contact. This thin steel plate welding and forming device can solve the product quality problems caused by the difficult-to-fix seam trajectory of the existing equipment, thereby improving the product quality of the hoop product.

[0047] It should be noted that, as Figure 17 shown, the seam maintaining mechanism 90 includes a seam base 91 and a seam plate 92. Among them, the seam base 91 is provided with a slideway in the vertical direction, and the seam plate 92 is slidably arranged in the slideway of the seam base 91. As Figure 18As shown, the opposite sides of the seam plate 92 are a plane 921 and an inclined surface 922, respectively. In a natural state, one end of the seam plate 92 close to the machine base 10 extends out of the seam base 91. Therefore, the head and tail of the blank after being rolled by the rolling mechanism 30 will be blocked on the opposite sides of the seam plate 92. When the blank is pressed, the head and tail of the blank have a tendency to move closer to each other, so that the head of the blank can be pressed against the plane 921 and the tail of the blank can be pressed against the inclined surface 922, thereby forcing the seam plate 92 to slide relative to the seam base 91 toward the side away from the machine base 10 until the end of the seam plate 92 close to the machine base 10 is retracted into the seam base 91. At this time, the head and tail of the blank are no longer separated by the seam plate 92 and can fit each other to achieve close contact.

[0048] In the above process, since the head of the blank is pressed against the plane 921, the head of the blank only exerts a force F along the direction perpendicular to the plane 921 (ie, the horizontal direction) on the joint plate 92. 头 Since the tail of the blank is pressed against the inclined surface 922, the force F exerted by the tail of the blank on the joint plate 92 is 尾 It can be divided into a first component force F1 along the horizontal direction and a second component force F2 along the vertical direction. The force that makes the end of the seam plate 92 close to the machine base 10 extend out of the seam base 91 in the natural state is recorded as F0. When the second component force F2 is greater than the force F0, the seam plate 92 can be lifted up by the tail of the blank and slide toward the side away from the machine base 10 until the end of the seam plate 92 close to the machine base 10 is retracted into the seam base 91. At this time, the head and tail of the blank can converge at the positive projection of the plane 921 on the machine base 10, so that when the thin steel plate welding forming equipment is used to process the clamp product, the actual position of the seam formed between the head and tail of the blank is always fixed, so that the seam trajectory can coincide with the preset welding gun 103 trajectory to avoid off-center welding, thereby effectively improving the product quality of the clamp product.

[0049] It is worth noting that, with regard to how to make the end of the joint plate 92 close to the machine base 10 extend out of the joint base 91 in a natural state (or who specifically provides the force F0), those skilled in the art should be able to make reasonable choices and designs according to actual conditions, and no specific restrictions are made here. For example, in this embodiment, a fourth cylinder 93 is provided on the joint plate 92, and a suitable air pressure is pre-set on the intake circuit of the fourth cylinder 93, so that the fourth cylinder 93 can become a spring with an approximately constant elastic force to press the joint plate 92. Of course, in other embodiments, a spring with an adjustable size can also be directly provided on the joint plate 92, or it can also be achieved by directly relying on the deadweight of the joint plate 92.

[0050] In addition, the inclination angle α of the inclined surface 922 should not be too small to avoid too small a distance between the inclined surface 922 and the machine base 10, which may make it difficult for the tail of the blank to enter. Of course, the inclination angle α of the inclined surface 922 should not be too large either, to avoid too small a second component force F2, which may make it difficult to lift the splicing plate 92 by pressing the blank. Regarding the actual size of the inclination angle α of the inclined surface 922, those skilled in the art should be able to make a reasonable selection and design according to the actual situation, and no specific limitation is made here. By way of example, as Figure 18 shown, in this embodiment, the inclination angle α of the inclined surface 922 is 20°.

[0051] As Figures 14 to 16 shown, the welding mechanism 100 includes a displacement table 102 and a welding torch 103 fixedly arranged on the displacement table 102. The displacement table 102 is used to drive the welding torch 103 to move relative to the machine base 10, so that the orthographic projection of the welding torch 103 on the machine base 10 coincides with the orthographic projection of the plane 921 on the machine base 10.

[0052] It should be noted that, as Figures 14 to 16 shown, the welding mechanism 100 includes a displacement table 102 and a welding torch 103. Among them, the welding torch 103 is arranged in the vertical direction. The displacement table 102 can drive the welding torch 103 to move relative to the machine base 10, so that the orthographic projection of the welding torch 103 on the machine base 10 coincides with the orthographic projection of the plane 921 on the machine base 10, so that the welding trajectory of the welding torch 103 coincides with the splicing trajectory formed between the head and the tail of the blank, thereby ensuring the welding effect during welding. The above-mentioned displacement table 102 can be a displacement table 102 that can realize position adjustment in the x single-axis direction (i.e., the aforementioned horizontal direction), or a displacement table 102 that can realize position adjustment in the x-y two-axis directions (i.e., the aforementioned horizontal direction and the vertical direction) to correspondingly increase the function of adjustable distance between the welding torch 103 and the splicing, or a displacement table 102 that can realize position adjustment in the x-y-z three-axis directions (i.e., the aforementioned horizontal direction, the vertical direction and the blank axial direction) to correspondingly increase the function of adjustable distance between the welding torch 103 and the splicing and the function of the welding torch 103 to perform welding along the blank axial direction.

[0053] As Figure 2 shown, the feeding mechanism 20 is used to convey the blank fed into the thin steel plate welding and forming equipment to the curling mechanism 30 for curling, and convey the head of the blank curled by the curling mechanism 30 to the side where the plane 921 is located. Specifically, as Figure 2 and Figure 4 shown, the feeding mechanism 20 includes a first pinch roll group 21 and a second pinch roll group 22 to form a conveying channel through the first pinch roll group 21 and the second pinch roll group 22. Among them, as Figure 4As shown in the figure, the first pinch roller group 21 is taken as an example for explanation. There are two first mounting seats 214 provided on the machine base 10. A pinch roller 212 is rotatably mounted between the two first mounting seats 214. Moreover, the pinch roller 212 is driven by a motor reducer 211. The difference between the second pinch roller group 22 and the first pinch roller group 21 is that the second pinch roller group 22 is powered by a sprocket 213 mounted on the motor reducer 211 and a chain mounted on the sprocket 213, so that the first pinch roller group 21 and the second pinch roller group 22 share one motor reducer 211, thereby reducing the equipment volume and saving the equipment cost.

[0054] It should be noted that, as Figure 2 shown, in order to facilitate feeding the blank into the thin steel plate welding and forming equipment, a first guide plate 24 is provided before the first pinch roller group 21. There are two first guide plates 24. Along the direction from the first pinch roller group 21 to the second pinch roller group 22, the distance between the two first guide plates 24 gradually decreases, so as to facilitate the thin steel plate welding and forming equipment to achieve feeding. A second guide plate 25 is provided between the first pinch roller group 21 and the second pinch roller group 22 to convey the blank passing through the first pinch roller group 21 to the second pinch roller group 22 through the second guide plate 25.

[0055] On this basis, as Figure 2 and Figure 5 shown, the feeding mechanism 20 further includes a pressing roller assembly 23 to cooperate with the first pinch roller group 21 to press the blank. Specifically, as Figure 2 and Figure 5 shown, two second mounting seats 235 are slidably provided on the machine base 10. A pressing roller 232 is rotatably mounted between the two second mounting seats 235. A fixed seat 234 is provided on the second mounting seat 235. The output shaft of the first cylinder 231 extends into the fixed seat 234 and can be fixedly connected to the second mounting seat 235 through a locking nut 233. Thus, driving the first cylinder 231 can drive the second mounting seat 235 to move in the vertical direction, so as to correspondingly adjust the distance between the pressing roller 232 and the pinch roller 212, and further ensure that blanks with different thicknesses t can all pass through smoothly between the pressing roller 232 and the pinch roller 212, and the pressing roller 232 can play a pressing role on blanks with different thicknesses t.

[0056] As Figure 6 and Figure 7As shown in the figure, the curling mechanism 30 includes a curling base 31, a lifting plate 32 and a supporting wedge 33 that are slidably arranged on the curling base 31. A rolling member 321 and two first bearing seats 322 are arranged on the lifting plate 32. A curling roller 323 is installed between the two first bearing seats 322. The supporting wedge 33 abuts against the rolling member 321. The supporting wedge 33 is driven to slide relative to the curling base 31, so that the rolling member 321 rolls along the inclined plane of the supporting wedge 33, forcing the lifting plate 32 to slide relative to the curling base 31 to correspondingly adjust the vertical height of the curling roller 323.

[0057] It should be noted that, as Figure 6 and Figure 7 shown in the figure, the curling mechanism 30 includes a curling base 31 and a lifting plate 32. Among them, two first bearing seats 322 are arranged on the lifting plate 32, and a curling roller 323 is installed between the two first bearing seats 322. As Figure 2 shown in the figure, since the vertical height of the curling roller 323 is higher than the vertical height of the feeding mechanism 20, therefore, the blank conveyed to the curling mechanism 30 by the feeding mechanism 20 will change its original movement direction (that is, tilt upward at a certain angle) when passing through the curling roller 323. Thus, the curling process of the blank can be realized. Therefore, changing the vertical height of the curling roller 323 (essentially changing the height difference between the curling roller 323 and the feeding mechanism 20) can correspondingly adjust the specific diameter of the blank curling.

[0058] For this reason, as Figure 6 and Figure 7 shown in the figure, the curling mechanism 30 further includes a supporting wedge 33. Among them, the curling base 31 is provided with a first guide rail 31a in the vertical direction and a second guide rail 31b in the axial direction of the blank. The lifting plate 32 is slidably arranged on the first guide rail 31a of the curling base 31, and the supporting wedge 33 is slidably arranged on the second guide rail 31b of the curling base 31. A rolling member 321 is further arranged on the lifting plate 32. The supporting wedge 33 abuts against the rolling member 321. When the supporting wedge 33 is driven to slide relative to the curling base 31, the rolling member 321 can roll along the inclined plane of the supporting wedge 33, thereby forcing the lifting plate 32 to slide relative to the curling base 31 to correspondingly adjust the vertical height of the curling roller 323. Thus, the specific diameter of the blank curling can be correspondingly adjusted.

[0059] In order to avoid the lifting plate 32, the first bearing seat 322 and the curling roller 323 being too heavy, resulting in the rolling member 321 rolling on the supporting wedge 33 being relatively difficult, as Figure 6 and Figure 7As shown, the curling mechanism 30 further includes two mounting rods 34 fixedly arranged on the curling base 31. An elastic member 341 is sleeved on each mounting rod 34. Two ends of the elastic member 341 are respectively connected to the curling base 31 and the lifting plate 32 to support the lifting plate 32 through the elastic member 341. Moreover, the elastic potential energy stored in the elastic member 341 can change with the change in the position of the lifting plate 32 relative to the supporting wedge 33. Specifically, when the distance between the lifting plate 32 and the supporting wedge 33 is small (or the vertical height of the curling roller 323 is low), the extrusion force on the elastic member 341 is large, the stored elastic potential energy is large, and the elastic force provided by it is large, which helps the rolling member 321 move towards the high point of the supporting wedge 33; when the distance between the lifting plate 32 and the supporting wedge 33 is large (or the vertical height of the curling roller 323 is high), the extrusion force on the elastic member 341 is small, the stored elastic potential energy is small, and the elastic force provided by it is easily overcome, so that the rolling member 321 can move towards the low point of the supporting wedge 33.

[0060] It should also be noted that, as Figure 7 shown, in order to facilitate the acting force of the elastic member 341 on the lifting plate 32, the first bearing seat 322 and the curling roller 323, a connecting support 342 is arranged between the lifting plate 32 and the first bearing seat 322. The connecting support 342 has an L-shaped structure. Opposite sides of one folding arm of the L-shaped structure are respectively fixedly connected to the lifting plate 32 and the first bearing seat 322, and the other folding arm of the L-shaped structure is fixedly connected to the elastic member 341. In addition, as Figure 6 and Figure 7 shown, in order to facilitate driving the supporting wedge 33, a ball nut 331 is fixedly connected to one side of the supporting wedge 33. A screw hole is arranged on the curling base 31. A screw rod 332 is assembled in the screw hole and connected to the first handwheel 333. The ball nut 331 is sleeved on the screw rod 332, so that an operator can control the supporting wedge 33 to slide along the second guide rail 31b by rotating the first handwheel 333.

[0061] As Figure 2 shown, the stock feeding mechanism 40 is used to move the tail of the blank towards the side close to the head of the blank to the side where the inclined surface 922 is located. Specifically, as Figure 2 、 Figure 8 and Figure 9 shown, the stock feeding mechanism 40 includes two second bearing seats 42 slidably arranged on the machine base 10. A bearing 43 is installed between the two second bearing seats 42. A stock feeding fork 431 is fixedly arranged on the bearing 43. The bearing 43 is driven to rotate relative to the second bearing seat 42, which can drive the stock feeding fork 431 to rotate towards the side close to the seam holding mechanism 90.

[0062] It should be noted that, as Figure 2As shown, the aforementioned pressing roller assembly 23 can cooperate with the first pinch roller group 21 to press the blank. Here, the stock guide mechanism 40 can also cooperate with the second pinch roller group 22 to press the blank, so that when the blank passes through the curling roller 323, its original movement direction can be quickly and significantly changed (i.e., tilted upward at a certain angle). As Figure 8 and Figure 9 shown, when the micro switch 48 on the stock guide mechanism 40 captures that the tail of the blank has passed between the stock guide mechanism 40 and the second pinch roller group 22, the stock guide mechanism 40 no longer needs to continue to cooperate with the second pinch roller group 22 to press the blank. At this time, the second bearing block 42 can slide in the vertical direction (for example, move down by the thickness t of a blank) under the action of the second cylinder 44 (and the cylinder connecting seat 41), so as to facilitate the stock guide mechanism 40 to dial the tail of the blank to the side where the inclined surface 922 is located toward the side close to the head of the blank.

[0063] As for how the stock guide mechanism 40 dials the tail of the blank to the side close to the head of the blank, as Figure 8 and Figure 9 shown, a bearing 43 is installed between the two second bearing blocks 42. As is well known, the bearing 43 is divided into an inner ring and an outer ring. When the third cylinder 45 drives the bearing 43 to rotate through the rack 47 and the gear 46, the inner ring of the bearing 43 rotates, while the outer ring of the bearing 43 remains stationary. Therefore, a stock guide fork 431 is fixedly arranged on the above-mentioned bearing 43. In fact, the stock guide fork 431 is fixedly connected to the inner ring of the bearing 43, so that the driving third cylinder 45 can drive the inner ring of the bearing 43 and the stock guide fork 431 to rotate, thereby dialing the tail of the blank to the side close to the head of the blank through the stock guide fork 431.

[0064] As Figures 1 to 3 、 Figures 10 to 12 shown, the left stock stop mechanism 50 and the right stock stop mechanism 60 are respectively used to abut against the left and right sides of the blank, and the upper stock stop mechanism 70 is used to abut against the top of the blank and press the blank. Specifically, as Figure 10 shown, the left stock stop mechanism 50 includes a first base 51. A third guide rail 52 is arranged on the first base 51. The left baffle 53 is slidably arranged on the third guide rail 52. For example, in this embodiment, the left baffle 53 is driven by a first motor 54, and the power is transmitted through a first synchronous belt transmission assembly 55 and a first screw rod slider assembly 56; as Figure 11 shown, the right stock stop mechanism 60 includes a second base 61. A fourth guide rail 62 is arranged on the second base 61. The right baffle 63 is slidably arranged on the fourth guide rail 62. For example, in this embodiment, the right baffle 63 is driven by a second handwheel 64, and the power is transmitted through a second screw rod slider assembly 65 and a connecting seat 66; as Figure 12As shown in the figure, the upper material blocking mechanism 70 includes an upper baffle 73. The upper baffle 73 is driven by a second motor 71 and the power is transmitted through a third lead screw slider assembly 72. In addition, an adjustable baffle 74 can be provided on the side of the upper baffle 73 close to the liftable baffle. The adjustable baffle 74 can slide relative to the upper baffle 73 to flexibly change the actual length of the upper material blocking mechanism 70 along the axial direction of the blank, so as to be applicable to blanks of different widths for curling and welding.

[0065] The existing equipment in the industry also has the following product quality problems: after the blank is curled and before welding, there is a tiny gap between the head and the tail of the material, resulting in intermittent welding penetration at the seam where the gap exists. Therefore, in this application, when the head and the tail of the blank are spliced, by driving the left material blocking mechanism 50 by the above-mentioned first motor 54, driving the right material blocking mechanism 60 by the second handwheel 64 (which will not move after being adjusted in place), and driving the upper material blocking mechanism 70 by the second motor 71, it can be ensured that there is always a certain elastic positive pressure between the head and the tail of the blank on the cross-section of the seam. This elastic positive pressure can prompt the head and the tail of the blank to always maintain effective contact on the cross-section of the seam, thus eliminating the tiny gap between the head and the tail of the material.

[0066] The existing equipment in the industry also has the following product quality problems: during the curling and welding of the blank, it cannot ensure the alignment of the edges of the blank. After the pressing for welding, when pouring concrete in the pipe mold through the centrifugal process section, a gap appears between the unaligned part and the pipe mold, resulting in slurry leakage. Therefore, in this application, as Figures 13 to 17 shown, the seam joining mechanism 80 includes a slide rail base 81 and a push plate 82 slidably arranged on the slide rail base 81. The push plate 82 is driven to slide relative to the slide rail base 81, and can drive the blank to move towards the side close to the liftable material blocking mechanism 110, so that the seam joining mechanism 80 and the liftable material blocking mechanism 110 respectively abut against the front and rear sides of the blank, thereby realizing the alignment of the edges of the blank in the axial direction of the blank.

[0067] Exemplarily, as Figure 13 and Figure 16 shown, in this embodiment, the push plate 82 is driven by a third motor 821, and the power is transmitted through a second synchronous belt transmission assembly 822 and a fourth lead screw slider assembly 823. It should be noted that when the aforementioned displacement stage 102 is the displacement stage 102 in the x single-axis direction and the x-y two-axis direction, as Figure 14 shown, the displacement stage 102 can be fixed on the slider (or the push plate 82) of the fourth lead screw slider assembly 823 of the seam joining mechanism 80 through a welding base 101, so that the welding mechanism 100 and the seam joining mechanism 80 share a set of driving mechanisms (i.e., the third motor 821, the second synchronous belt transmission assembly 822 and the fourth lead screw slider assembly 823), thereby reducing the volume of the equipment and saving the equipment cost.

[0068] Since the seam holding mechanism 90 will interfere with the welding mechanism 100, during the welding operation of the welding mechanism 100 (when the seam holding mechanism 90 is not fixed to the welding mechanism 100), the seam holding mechanism 90 can be retracted in advance towards the side away from the liftable blank stop mechanism 110, or (as Figure 14 shown, when the seam holding mechanism 90 is fixed to the welding mechanism 100 and the welding mechanism 100 is located on the side close to the liftable blank stop mechanism 110), the seam holding mechanism 90 can be retracted synchronously towards the side away from the liftable blank stop mechanism 110. At this time, the vertical limiting effect provided by the seam holding mechanism 90 on the head and tail of the blank will disappear. For this reason, as Figures 13 to 17 shown, the seam joining mechanism 80 further includes a vertical slide 83 fixedly arranged on the slide rail base 81 and two laminating plates 84 slidably arranged on the vertical slide 83. The two laminating plates 84 are respectively located on opposite sides of the seam holding mechanism 90, and the laminating plates 84 can be driven to press the head and tail of the blank against the machine base 10.

[0069] It should be noted that, as Figure 13 and Figure 16 shown, the seam joining mechanism 80 further includes a vertical slide 83 and two laminating plates 84. The two laminating plates 84 extend along the axial direction of the blank. After the head and tail of the blank are spliced, the head and tail of the blank are pressed by the two laminating plates 84, so as to always maintain the fitting contact between the head and tail of the blank. Exemplarily, as Figure 16 shown, in this embodiment, a connecting bracket 841 is arranged between the vertical slide 83 and the laminating plate 84 to correspondingly adjust the distance between the laminating plate 84 and the machine base 10 by the sliding of the connecting bracket 841 on the vertical slide 83. Among them, the connecting bracket 841 has a triangular structure. One of the right-angled sides of the triangular structure is slidably connected to the vertical slide 83, and the other right-angled side of the triangular structure is fixedly connected to the laminating plate 84 to improve the connection strength between the connecting bracket 841 and the laminating plate 84.

[0070] The existing equipment in the industry also has the following product quality problems: during the blank curling process, the phenomenon of head and tail overlap of the blank is likely to occur, resulting in virtual welding during welding, and causing cracking during the subsequent over-pressing process, resulting in waste materials. For this reason, in this application, as Figure 17As shown, the thickness of the blank is t, and the distances between the laminate 84 and the top surface of the machine base 10 (i.e., the top surface of the middle cover plate 11) and between the splicing base 91 and the top surface of the machine base 10 are both d, and they satisfy the relationship: t < d < 2t. For example, in actual setting, d can be taken as 1.3t to 1.6t. When the leading end of the blank moves toward the side close to the plane 921 by passing through the gaps between the laminate 84 and the top surface of the machine base 10 on the side where the plane 921 is located and between the splicing base 91 and the top surface of the machine base 10 in sequence, and when the trailing end of the blank moves toward the side close to the leading end by passing through the gaps between the laminate 84 and the top surface of the machine base 10 on the side where the inclined plane 922 is located and between the splicing base 91 and the top surface of the machine base 10 in sequence, through the mutual cooperation among the laminate 84, the splicing base 91 and the machine base 10, the interlayer crosstalk between the leading end and the trailing end of the blank can be restricted, thereby avoiding the overlapping phenomenon of the leading end and the trailing end of the blank.

[0071] Exemplarily, as Figure 19 As shown, in this embodiment, the liftable blank stop mechanism 110 includes a third base 111 and a front baffle 112 slidably disposed on the third base 111. When it is necessary to cooperate with the push plate 82 of the splicing mechanism 80, the front baffle 112 can be lifted in advance. When there is no need to cooperate with the push plate 82 of the splicing mechanism 80, the front baffle 112 can be kept in a standby state where its top surface does not exceed the top surface of the machine base 10. Specifically, the front baffle 112 is driven by a fifth cylinder 113, and the power is transmitted through a connecting plate 114. At the same time, a third guide plate 115 is also provided on the third base 111 to guide and restrict the movement direction of the front baffle 112 through the guide groove on the third guide plate 115.

[0072] In summary, the specific processing process of preparing the hoop product by using this thin steel plate welding and forming equipment mainly includes: when the blank with a fixed length is conveyed to this thin steel plate welding and forming equipment, the blank first passes through the first guide plate 24 at the entrance, and the first pinch roll group 21 cooperates with the pressing roll assembly 23 above it to press the blank tightly. The motor reducer 211 of the first pinch roll group 21 starts to drive the blank to be conveyed forward; the blank continues to pass through the second guide plate 25 and reaches the second pinch roll group 22. The second pinch roll group 22 cooperates with the stock feeding mechanism 40 above it to press the blank tightly and convey the blank in a relay manner (the second pinch roll group 22 obtains power from the motor reducer 211 of the first pinch roll group 21 through the sprocket 213 and the chain); the head of the blank continues to move forward and touches the curling roll 323 of the curling mechanism 30. Under the action of the curling roll 323, the head of the blank deflects upward. The second pinch roll group 22 continues to convey the blank to perform curling processing on the blank; the head of the blank after being curled by the curling mechanism 30 enters the gap on the right side of the laminate 84. When the head of the blank continues to move forward, it will be blocked by the plane 921 of the splicing plate 92; the second pinch roll group 22 continues to convey the blank to the tail end through the second pinch roll group 22. When the microswitch 48 captures that the tail end of the blank has passed through the second pinch roll group 22, the bearing 43 of the stock feeding mechanism 40 moves down a certain height (such as the thickness t of a blank) under the action of the second air cylinder 44, and then the stock feeding fork 431 rotates clockwise by a certain angle (such as 270°) under the action of the third air cylinder 45, the gear 46 and the rack 47, and the tail end stuck between the second pinch roll group 22 and the stock feeding mechanism 40 is dialed to the left side of the laminate 84. The left stop mechanism 50 starts to push the tail end further into the gap on the left side of the laminate 84; the upper stop mechanism 70 presses down until it just touches the blank. Then, the push plate 82 of the seam closing mechanism 80 is pushed by the third motor 821, the second synchronous belt transmission assembly 822 and the fourth lead screw slider assembly 823, and the blank is pushed toward the side close to the liftable stop mechanism 110. The front baffle 112 of the liftable stop mechanism 110 rises. The push plate 82 on the inner side pushes the blank until it stops at a distance just one plate width from the front baffle 112 on the outer side (the actual distance can leave some margin, such as one plate width + 1 - 2 mm). Thus, the blank completes the edge alignment process of the blank under the action of the inner push plate 82 and the outer front baffle 112; the preset distance between the laminate 84 and the middle cover plate 11 and the distance d between the splicing base 91 and the middle cover plate 11 satisfy the relational expression: t < d < 2t to prevent the head and tail of the blank from overlapping during the splicing process. The upper stop mechanism 70 continues to press down. The head of the blank is tightly pressed against the plane 921 on the right side of the splicing plate 92, and the tail end of the blank is tightly pressed against the inclined plane 922 on the left side of the splicing plate 92. As the upper stop mechanism 70 continues to press down, the force F exerted by the tail end of the blank on the splicing plate 92 尾As it gradually increases, the tail end of the blank will push up the splicing plate 92 to fit with the head end, and through the elastic positive pressure applied by the first motor 54 driving the left material stop mechanism 50, the second handwheel 64 driving the right material stop mechanism 60 (which will no longer move after being adjusted in place), and the second motor 71 driving the upper material stop mechanism 70, close contact is achieved, thus eliminating the tiny gap between the head end and the tail end of the blank; after the splicing plate 92 is pushed up, it still maintains elastic compression on the tail end of the blank, and then the laminating plate 84 presses down to simultaneously press the head end and the tail end of the blank that has completed edge alignment, no layer misalignment, and seamless splicing; the welding torch 103 is pre-set directly above the plane 921 of the splicing plate 92, and then the seam welding mechanism 80 starts to retreat, driving the welding torch 103 to retreat while welding until the welding is completed; after the welding is completed, the left material stop mechanism 50 resets, the upper material stop mechanism 70 resets, the laminating plate 84 lifts to release the welded hoop, extends out the splicing plate 92 again, the seam welding mechanism 80 starts to advance, pushes out the welded hoop for blanking, and then the seam welding mechanism 80 resets together with the welding torch 103. Thus, a full cycle of hoop curling welding is completed, and preparations are made to receive the next blank.

[0073] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A thin steel plate welding and forming device, characterized in that It includes a machine base, a curling mechanism and a seam-holding mechanism arranged on the machine base. The seam-holding mechanism includes a seam base and a seam plate slidably arranged on the seam base. The opposite sides of the seam plate are a flat surface and an inclined surface respectively. The head and tail of the blank after being curled by the curling mechanism are respectively located on the opposite sides of the seam plate. Pressing the blank can drive the head and tail of the blank to approach each other, so that the head of the blank abuts tightly against the flat surface, the tail of the blank abuts tightly against the inclined surface, and forces the seam plate to slide relative to the seam base until the head and tail of the blank are in close contact. The curling mechanism includes a curling base, a lifting plate and a supporting wedge slidably arranged on the curling base. Rolling elements and two first bearing seats are arranged on the lifting plate. A curling roller is installed between the two first bearing seats. The supporting wedge abuts against the rolling elements. The supporting wedge is driven to slide relative to the curling base, so that the rolling elements roll along the inclined surface of the supporting wedge, and forces the lifting plate to slide relative to the curling base to correspondingly adjust the vertical height of the curling roller. It also includes a left stop mechanism, a right stop mechanism and an upper stop mechanism arranged on the machine base. The left stop mechanism and the right stop mechanism are respectively used to abut against the left and right sides of the blank, and the upper stop mechanism is used to abut against the top of the blank and press the blank. It also includes a seam-welding mechanism and a liftable stop mechanism arranged on the machine base. The seam-welding mechanism includes a slide rail base and a push plate slidably arranged on the slide rail base. The push plate is driven to slide relative to the slide rail base, and can drive the blank to move towards the side close to the liftable stop mechanism, so that the seam-welding mechanism and the liftable stop mechanism respectively abut against the front and back sides of the blank. The seam-welding mechanism also includes a vertical slide table fixedly arranged on the slide rail base and two laminating plates slidably arranged on the vertical slide table. The two laminating plates are respectively located on the opposite sides of the seam-holding mechanism. The laminating plates are driven to press the head and tail of the blank on the machine base.

2. The thin steel plate welding and forming equipment according to claim 1, wherein, It also includes a welding mechanism arranged on the machine base. The welding mechanism includes a displacement table and a welding torch fixedly arranged on the displacement table. The displacement table is used to drive the welding torch to move relative to the machine base, so that the orthographic projection of the welding torch on the machine base coincides with the orthographic projection of the flat surface on the machine base.

3. The thin steel plate welding and forming equipment according to claim 1, characterized in that, The curling mechanism also includes two mounting rods fixedly arranged on the curling base. An elastic member is sleeved on each mounting rod. The two ends of the elastic member are respectively connected to the curling base and the lifting plate.

4. The thin steel plate welding and forming equipment according to claim 1, characterized in that, It also includes a feeding mechanism and a material-pushing mechanism arranged on the machine base. The feeding mechanism is used to convey the blank fed into the thin steel plate welding forming equipment to the curling mechanism for curling, and convey the head of the blank after being curled by the curling mechanism to the side where the flat surface is located. The material-pushing mechanism is used to push the tail of the blank towards the side close to the head to the side where the inclined surface is located.

5. The thin steel plate welding and forming equipment according to claim 4, characterized in that, The blank feeding mechanism includes two second bearing seats slidably arranged on the machine base. A bearing is installed between the two second bearing seats. A blank feeding fork is fixedly arranged on the bearing. The bearing is driven to rotate relative to the second bearing seats, and can drive the blank feeding fork to rotate towards the side close to the seam holding mechanism.

6. The thin steel plate welding and forming equipment according to claim 1, characterized in that The thickness of the blank is t, and the distances between the laminate and the top surface of the machine base and between the seam base and the top surface of the machine base are both d, and satisfy the relational expression: t < d < 2t.

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