A continuous stamping process for solar tracking bracket

Abstract

The present invention belongs to the technical field of stamping processing, and relates to a continuous stamping process for a solar tracking bracket, and the steps include: punching positioning holes, cutting outer edges, pressing chamfers, arching, step-by-step embossing, flanging, shaping, side punching and blanking. This continuous stamping process adds a chamfering step between the outer edge cutting step and the arching step, squeezes the material around the tearing band into a more compact structure, reduces the risk of tearing of the arc edge in the flanging step, and ensures the service life of the forming punch; the convex hull structure can be formed with the material outside the pre-forming range of the arch bridge part, and the peripheral material is continuously supplemented to the central part during multiple embossing, so that the thickness of the final convex hull can be thicker and more uniform; the flat plate structure can reduce the flanging height, which is also more conducive to controlling the deformation of the initial arc edge and reducing the risk of tearing at the edge.

Description

Technical Field

[0001] The invention relates to the technical field of stamping processing, and in particular to a continuous stamping process for a solar tracking bracket. Background Art

[0002] Figure 1 Shown is a solar tracking bracket 1, which has a bridge structure, including an arch bridge portion 11, two flat plate portions 12 located at both ends of the arch bridge portion 11, and two side portions 13 tilted upward from both sides of the arch bridge portion 11, the notch of the flat plate portion 12 faces outward, the lower part of the side portion 13 is connected to the side of the flat plate portion 12, a downwardly protruding bulge 111 is provided in the middle of the arch bridge portion 11, the upper part of the side portion 13 is an arc-shaped edge 131, and a plurality of side holes 132 are provided in the middle.

[0003] Chinese patent CN113634680A discloses a method for forming a car antenna support. The car antenna support here also has a convex hull structure and a flange structure, but the convex hull is not high and the width of the flange area is also small. The solar tracking support 1 has a different molding difficulty because of the bridge structure. The molding difficulties of this solar tracking support 1 are as follows:

[0004] 1. The convex hump 111 is located in the middle of the arch bridge portion 11 and its height is much greater than the material thickness. Punching after the side portion 13 is turned up will cause the material to break;

[0005] 2. The end of the arch bridge portion 11, the side portion 13 and the flat plate portion 12 are substantially in a perpendicular relationship with each other, and the materials on different surfaces will affect each other, making it difficult to obtain structural accuracy at one time;

[0006] 3. The side surface 13 is of a fan-shaped structure, and the middle material is pulled by the arch bridge portion 11, so the arc edge 131 located at a position opposite to the arch bridge portion 11 needs to be thinned, and the initial structure of the arc edge 131 is more easily torn due to the existence of the stamping tear zone.

[0007] Therefore, it is necessary to design a new molding method to solve the above problems. Summary of the invention

[0008] The main purpose of the present invention is to provide a continuous stamping process for a solar tracking bracket, which can continuously form a solar tracking bracket, improve process continuity, ensure structural accuracy, and prevent product breakage.

[0009] The present invention achieves the above-mentioned purpose through the following technical solutions: a continuous stamping process for a solar tracking bracket, used for forming a solar tracking bracket with a bridge structure, the solar tracking bracket comprises an arch bridge portion, two flat plate portions located at both ends of the arch bridge portion and extending horizontally outward, and two side portions extending upward from the arch bridge portion and the edges of both sides of the flat plate portion, a convex bulge protruding downward is provided in the middle of the arch bridge portion, the upper edge of the side portion is an arc edge, a U-shaped notch opening outward is provided on the flat plate portion, and a plurality of side holes are provided on the side portion, and the process steps include:

[0010] S1. Punching: Provide a material strip, the processing unit range of the material strip includes a molding area located in the middle of the material strip and two connecting strips located on both sides of the material strip in the Y direction, and the material strip is conveyed step by step along the X direction, and then a positioning hole is punched in each connecting strip;

[0011] S2, cutting the outer edge: taking the two positioning holes as reference, cutting out the blank and two connecting parts within the range of the forming area; the two connecting parts are located at the two ends of the blank in the Y direction; the blank is formed with initial arc edges on both sides in the X direction, and the two ends in the Y direction are respectively connected to the middle of the connecting part, the connecting part is a thin strip structure as a whole and a U-shaped deformation belt is formed on both sides connected to the blank, and the two free ends of the connecting part are connected to the inner side of the same connecting belt;

[0012] S3, chamfering: taking the two positioning holes as reference, a chamfer is pressed on the lower edge of the initial arc-shaped edge to eliminate burrs generated by the initial arc-shaped edge during punching and forming;

[0013] S4, arching: with two positioning holes as reference, the middle part of the blank is deformed into a downwardly concave arc surface, and a flat plate structure is formed at both ends of the blank in the Y direction, the flat plate structure has a high surface and two low surfaces, the two low surfaces are symmetrically connected to the two sides of the high surface in the X direction, and the low surface and the high surface are smoothly transitioned through the arc surface, the middle part of the connecting part is connected to the outer edge of the high surface, and during the forming of the arc surface, the U-shaped deformation band is stretched in the Y direction, providing a deformation amount for the follow-up of the connecting part during the forming of the arc surface;

[0014] S5, punching convexity in steps: using the two positioning holes as reference, punching a first convexity upwards in the middle of the arc-shaped surface, the first convexity having a larger range than the convexity and a lower height than the convexity, and then obtaining the convexity by pulling up and shrinking the opening for multiple times;

[0015] S6, flanging: taking the convex hull and the two positioning holes as reference, folding down the two side portions of the arc surface in the X direction and the two low-position surfaces connected to it in the Y direction to form the side portions, the initial arc edge is deformed into the arc edge, and the unfolded portion in the middle of the arc surface forms the arch bridge portion;

[0016] S7, shaping: taking the convex bulge and the two positioning holes as reference, the entire blank is molded and shaped so that the two side surfaces are in an upright state;

[0017] S8, side punching: taking the convex bulge and the two positioning holes as reference, cutting out the side holes on the upper sides of the two side parts;

[0018] S9, blanking: using the two positioning holes as a reference, punching the high surface to form the U-shaped notch to obtain the flat plate portion, while the flat plate portion is disconnected from the connecting portion, and the solar tracking bracket falls from the material strip.

[0019] Specifically, the connecting belt includes connecting sections and positioning sections that are alternately distributed, the positioning hole is located in the positioning section, and the connecting portion is connected to the connecting section; the connecting section is a slender strip structure, and the positioning section protrudes from the inner edge of the connecting section to provide sufficient strength for the structure of the positioning hole; in the arching step, a pair of positioning blocks are used to block the inner edge of the connecting section to prevent the connecting section from being deformed when the U-shaped deformation belt is stretched in the Y direction.

[0020] Specifically, the outer edge cutting step is completed through two trimming steps. The first trimming step cuts out the inner contour of the connecting part and removes part of the partition material between adjacent blanks to form the middle arc segment of the initial arc edge. The second trimming step removes the remaining partition material between adjacent blanks to form two edge arc segments of the initial arc edge. The two edge arc segments are adjacent to the two ends of the middle arc segment. The middle arc segment and the edge arc segment together constitute the initial arc edge.

[0021] Furthermore, the curvature radii of the two edge arc segments are equal and greater than the curvature radius of the middle arc segment.

[0022] Furthermore, the step-by-step embossing step is divided into five steps, the convex hull of the latter step is smaller in range and higher in height than the convex hull of the former step, and the diameter of the first convex hull is greater than the width of the arch bridge portion.

[0023] Specifically, in the arching step, the width of the high surface is equal to the width of the arch bridge portion.

[0024] Specifically, in the shaping step, a shaping mold is used to shape the blank, and the shaping mold includes a shaping support block, a shaping pressure block above the shaping support block, and a pair of side shaping blocks respectively located on the left and right sides. The shaping support block and the shaping pressure block limit the upper and lower positions of the blank, and two side shaping blocks are used to over-press and shape the outer sides of the side parts. The XZ cross-section of the shaping support block presents a structure that is wide at the top and narrow at the bottom, so that its side faces are inclined downward, and the inner side faces of the side shaping blocks are upwardly inclined oblique surfaces opposite to the side faces of the shaping support block. The middle part of the lower surface of the shaping pressure block has a positioning groove that matches the upper surface structure of the convex hull, and the middle part of the upper surface of the shaping support block has a positioning protrusion that matches the lower surface structure of the convex hull.

[0025] Furthermore, two auxiliary push rods are provided in the shaping support block, and the positions of the two auxiliary push rods are mirror-symmetrical with respect to the XZ symmetry plane of the shaping support block. The upper ends of the auxiliary push rods act on the lower surface of the arch bridge part, and the upper ends of the auxiliary push rods are in an arc-shaped structure that matches the arch bridge part.

[0026] Specifically, the side punching step is divided into three steps. The first step is to cut out the side hole on the front side portion, the second step is an empty step, and the third step is to cut out the side hole on the rear side portion.

[0027] Furthermore, two main ejector pins are used to remove the material in the flanging step to the side punching step, and the material removal position is located on the lower surface of the high-level surface and outside the pre-forming range of the flat plate portion.

[0028] The beneficial effects of the technical solution of the present invention are:

[0029] 1. This process firstly punches the arch after punching the positioning hole and cutting the outer edge to form a curved surface, so as to preform the arch bridge part and provide a convex deformation surface, and then forms the convex hull, so as to obtain a convex hull with uniform thickness before flanging. The convex hull is used as the positioning for the subsequent processing of the blank, and finally the flanging is performed to ensure the effective forming of the side part;

[0030] 2. The structure of the connecting belt is divided into connecting sections and positioning sections that are alternately distributed. The positioning section is set to provide sufficient strength for the positioning hole structure. The connecting section is connected to the blank through the connecting part so that the connecting part can be stretched in the Y direction during the arching step. The inner edge of the connecting section can be blocked by the positioning block to prevent the connecting section from being deformed when the connecting part is stretched in the Y direction.

[0031] 3. The product is inverted to form the product. The reason is that the process includes the step of side punching. When the product is inverted, the opening is downward, which is convenient for the waste from the side hole to fall down;

[0032] 4. After the blank is formed, the chamfering treatment is performed to flatten the burr of the tearing strip into a chamfer, so that the edge of the product is smoother, and the material around the tearing strip is squeezed into a tighter structure, thereby reducing the risk of tearing of the arc edge during the flanging step and ensuring the service life of the forming punch;

[0033] 5. In the process of cutting the outer edge, multiple arc-shaped edges are set to form the initial arc-shaped edge. The curvature radius of the middle arc segment is smaller than the curvature radius of the edge arc segment, leaving more material flow margins on both sides of the convex position, so that the convex structure can be formed with the material outside the pre-forming range of the arch bridge part, and the peripheral material is continuously supplemented to the central part during multiple convexing, so that the edge of the blank after flanging can finally meet the structural requirements of the arc-shaped edge;

[0034] 6. Two flat plate structures are formed during arching, and a high surface and two low surfaces are formed on the flat plate structures, so that when flanging, the reference surface is located at the bottom of the low surface instead of the high surface, thereby reducing the flanging height. This is also more conducive to controlling the deformation of the initial arc edge and reducing the risk of tearing at the edge. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a three-dimensional diagram of a solar tracking bracket;

[0036] Figure 2 It is the structural change diagram of the material strip;

[0037] Figure 3 for Figure 2 A partial enlarged view of position A in the middle;

[0038] Figure 4 for Figure 2 A partial enlarged view of position B in the middle;

[0039] Figure 5 for Figure 2 A partial enlarged view of the C position in the middle;

[0040] Figure 6 It is the cross-sectional structural change diagram of the initial arc edge in the chamfering step;

[0041] Figure 7 It is a position relationship diagram of the material strip processing unit range and the positioning block in the arching step;

[0042] Figure 8 This is a diagram showing the structural changes on the front side of the blank during the flanging step;

[0043] Fig. 9 It is the XZ cross-sectional view of the shaping mold in the mold closing state in the flanging step;

[0044] Fig.10It is the YZ cross-sectional view of the shaping mold and the material strip in the mold closing state in the flanging step;

[0045] Fig.11 It is the position relationship diagram of the blank and the main ejector in the shaping step;

[0046] Fig.12 It is an XZ cross-sectional view of the two side punching dies and the material strip in the mold closing state in the side punching step.

[0047] The markings in the figure are:

[0048] 1-solar tracking bracket, 11-arch bridge portion, 111-convex hull, 12-flat plate portion, 121-U-shaped notch, 13-side portion, 131-arc edge, 132-side hole;

[0049] 2-material strip, 21-forming area, 211-blank, 2111-initial arc edge, 21111-tear strip, 21112-middle arc segment, 21113-edge arc segment, 2112-arc surface, 21121-first convex hull, 21122-second convex hull, 21123-third convex hull, 21124-fourth convex hull, 2113-flat plate structure, 21131-high surface, 21132-low surface, 212-chamfer, 213-connecting part, 22-connecting strip, 221-connecting section, 222-positioning section, 2221-positioning hole;

[0050] 3- Positioning block;

[0051] 4-shaping mold, 41-shaping support block, 411-positioning convex block, 42-shaping pressing block, 421-positioning groove, 43-side shaping block, 44-auxiliary ejector rod, 45-main ejector rod;

[0052] 5a-first side punching die, 5b-second side punching die, 51-side punching assembly, 52-blank punching assembly. DETAILED DESCRIPTION

[0053] The present invention is further described in detail below with reference to specific embodiments.

[0054] Example:

[0055] A continuous stamping process for a solar tracking bracket of the present invention is used to form a solar tracking bracket 1 with a bridge structure. The solar tracking bracket 1 includes an arch bridge portion 11, two flat plate portions 12 located at both ends of the arch bridge portion 11 and extending horizontally outward, and two side portions 13 extending upward from the edges of both sides of the arch bridge portion 11 and the flat plate portion 12. A convex bulge 111 is provided in the middle of the arch bridge portion 11, and the upper edge of the side portion 13 is an arc-shaped edge 131. A U-shaped notch 121 opening outward is provided on the flat plate portion 12, and a plurality of side holes 132 are provided on the side portion 13. The process steps include:

[0056] S1. Punching positioning holes: Provide a material strip 2. The processing unit range of the material strip 2 includes a molding area 21 located in the middle of the material strip 2 and two connecting strips 22 located on both sides of the conveying direction of the material strip 2. The material strip 2 is conveyed step by step along the X direction, and then a positioning hole 2221 is punched in each connecting strip 22. Figure 2 and Figure 3 shown.

[0057] The solar tracking bracket 1 is obtained by various stamping operations of the material of the forming area 21. The positioning hole 2221 is the positioning reference of the processing unit range. During the stamping process, the connecting belt 22 is used to maintain the stepping conveying, and each step is positioned by using the positioning hole 2221.

[0058] S2. Cutting the outer edge: With the two positioning holes 2221 as a reference, cut out the blank 211 and two connecting parts 213 within the range of the forming area 21. The two connecting parts 213 are located at the two ends of the blank 211 in the Y direction. Initial arc-shaped edges 2111 are formed on both sides of the blank 211 in the X direction, and the two ends in the Y direction are respectively connected to the middle of the connecting part 213. The connecting part 213 is a thin strip structure as a whole and a U-shaped deformation part is formed on both sides connected to the blank 211. The two free ends of the connecting part 213 are connected to the inner side of the same connecting belt 22. The connecting belt 22 includes connecting segments 221 and positioning segments 222 that are alternately distributed. The positioning hole 2221 is located in the positioning segment 222, and the connecting portion 213 is connected to the connecting segment 221. The connecting segment 221 is a slender strip structure, and the positioning segment 222 protrudes from the inner edge of the connecting segment 221 to provide sufficient strength for the structure of the positioning hole 2221. In the arching step, a pair of positioning blocks 3 are used to limit and block the inner edge of the connecting segment 221 to prevent the connecting segment 221 from deforming when the U-shaped deformation belt is stretched in the Y direction. Figure 2 and Figure 3 shown.

[0059] The X direction in the embodiment indicates the front-to-back direction of the conveying direction of the material belt 2, the Y direction indicates the side of the conveying direction of the material belt 2, and the Z direction indicates the closing direction of the mold. The blank 211 is the planar structural raw material of the solar tracking bracket 1 before molding, and its shape needs to be molded in advance. In order to prepare for the arch, the "{"-shaped connecting portion 213 should be left, and other positions need to be cut in advance; however, the connecting belt 22 cannot be too thin to affect the strength around the positioning hole 2221, so the connecting section 221 is used to connect the connecting portion 213, and the positioning section 222 is appropriately widened to ensure the accuracy of positioning.

[0060] The outer edge cutting step is specifically completed through two edge cutting steps. The first edge cutting step cuts out the inner contour of the connecting portion 213 and removes part of the partition material between adjacent blanks 211 to obtain two middle arc segments 21112. The second edge cutting step removes other partition materials between adjacent blanks 211 to obtain two pairs of edge arc segments 21113. Each middle arc segment 21112 is connected to two edge arc segments 21113 and together form the initial arc edge 2111. The curvature radius of the two edge arc segments 21113 is equal and greater than the curvature radius of the middle arc segment 21112.

[0061] The outer contour of the blank 21 is very long. If it is obtained by punching in one go, the material is likely to get stuck in the cutter. In order to avoid this problem, the outer contour of the blank 21 must be obtained in two steps. In order to leave enough margin for embossing, the blank contour obtained in the first trimming step must protrude slightly outward compared to the contours on both sides, so structurally, a middle arc segment 21112 with a smaller curvature radius and two edge arc segments 21113 with a larger curvature radius are formed.

[0062] S3, chamfering: With the two positioning holes 2221 as reference, a chamfer 212 is pressed out at the lower edge of the initial arcuate edge 2111 to eliminate the burrs generated by the initial arcuate edge 2111 during punching and forming. Figure 6 shown.

[0063] The initial arcuate edge 2111 is obtained by punching in the previous step, and is also the preformed structure of the arcuate edge 131. Because the material strip 2 has metal ductility, the essence of punching is the thinning, drawing and tearing of the material strip 2. It is impossible for the positions of the die and the punch to correspond completely, but there is a shear line position interval of less than millimeters, so that the materials in the boundary area are staggered up and down until they are torn. Therefore, it is inevitable that a tear band 21111 will appear on the opposite side of the punching direction during punching, which will appear as a collapsed edge on one side and burrs on the other side on the edge of the material. The material at the position of the tear band 21111 will be looser than the original state, and will also appear uneven in the direction along the edge line. It is difficult to resist the large deformation force in the concave part, which will cause the hidden danger of the arcuate edge 131 tearing after flanging. In order to avoid this problem, the general practice is to reduce the spacing distance between the shear lines of the concave and convex dies and reduce the range of the tear band, but this will bring the side effect of shortening the service life of the forming punch; while the present method does not need to reduce the spacing distance between the shear lines of the concave and convex dies in the punching step, but adds a chamfering operation after the trimming step. The chamfer 212 not only makes the edge of the product smoother, but also squeezes the material around the tear band 21111 into a tighter structure, thereby reducing the risk of tearing of the arc edge 131 in the flanging step, and ensuring the service life of the forming punch.

[0064] S4, arching: With the two positioning holes 2221 as reference, the middle part of the blank 211 is deformed into a downward arched arc surface 2112, and a flat plate structure 2113 is formed at both ends of the blank 211. The flat plate structure has a high surface 21131 and two low surfaces 21132. The two low surfaces 21132 are symmetrically connected to the X-direction sides of the high surface 21131, and the low surfaces 21132 and the high surface 21131 are smoothly transitioned through the arc surface. The middle part of the connecting part 213 is connected to the outer edge of the high surface 21131. During the forming process of the arc surface 2112, the U-shaped deformation belt is stretched in the Y direction, providing a deformation amount for the follow-up of the connecting part 213 when the arc surface 2112 is formed. Figure 2 , Figure 3 and Figure 7 shown.

[0065] In order to obtain the arch bridge portion 11, the blank 211 must first be arched to increase the upper and lower heights of the material. Correspondingly, both ends of the blank 211 will shrink toward the middle, and the connecting portion 213 will be deformed from a "{" shape to a "human" shape, so that the deformed blank 211 can be kept connected to the connecting belt 22. A pair of positioning blocks 3 are used for limiting in the arching step. The positioning blocks 3 block the inner edges of the connecting section 221, thereby preventing the connecting section 221 from deforming as the connecting section 213 is stretched. Because the arching operation is not conducive to maintaining the structure of the connecting belt 22, it is particularly necessary to pull the material at the corresponding position of the connecting portion 213 so that the rest of the connecting belt 22 maintains a linear structure, so as to ensure the stability of the stepping distance.

[0066] S5, punching convexities step by step: using the two positioning holes 2221 as reference, punching a first convex bump 21121 in the middle of the arc surface 2112, the first convex bump 21121 is larger in scope than the convex bump 111, but lower in height than the convex bump 111, and then the convex bump 111 is obtained by repeatedly pulling up and shrinking the mouth. Figure 2 and Figure 4 shown.

[0067] In order to prevent tearing during embossing, the convex bump 111 should maintain the uniformity of the material during the forming process. As a deep drawing process, this embodiment adopts five steps to complete, namely, the first convex bump 21121 → the second convex bump 21122 → the third convex bump 21123 → the fourth convex bump 21124 → the convex bump 111, the range of these five convex bumps decreases, while the height increases, and the diameter of the first convex bump 21121 is greater than the width of the arch bridge portion 11.

[0068] Although the preforming range of the arch bridge part 11 is determined, in order to improve the material uniformity of the convex part in each working step, the first convex part 21121 can be formed by using the materials outside the preforming range of the arch bridge part 11, and the materials on the periphery are continuously supplemented to the central part during the five convexity forming processes. In this way, the thickness of the finally obtained convex part 111 can be thicker and more uniform. Since the middle arc section 21112 is set in advance in the arch bridge part 11, more material flow allowance is left on both sides of the convexity forming position. Even if the materials on both sides flow towards the convex part during the convexity forming process, the edge of the blank 211 can finally meet the structural requirements of the arc edge 131 after flanging.

[0069] S6. Flanging: With the convex part 111 and the two positioning holes 2221 as the benchmarks, the two parts on the X - direction sides of the arc surface 2112 and the two low - level surfaces 21132 connected to it in the Y - direction are folded down together to form the side part 13, and the unfolded part in the middle of the arc surface 2112 forms the arch bridge part 11. As Figure 2 、 Figure 4 and Figure 8 shown.

[0070] In the arch forming step, the cross - section of the flat plate structure 2113 is in a "ji" shape and is located on one side of the arc surface 2112. The high - level surface 21131 is the preformed structure of the flat plate part 12, and the structure remains unchanged during the folding step. Since the width of the flat plate part 12 is the same as the width of the arch bridge part 11, the width of the high - level surface 21131 here is equal to the width of the arch bridge part 11. The low - level surface 21132 and the two side parts of the arc surface 2112 are the preformed structures of the side part 13. Before deformation, it is a smooth curved surface structure, and the side part 13 is a fan - shaped ring structure. Affected by the arch bridge part 11, the greater the folding height, the greater the drawing of the outer end of the side part 13. Therefore, the reason for preforming the two sides of the blank 21 in the Y - direction into a high - level surface 21131 and two low - level surfaces 21132 is that during flanging, the structure of the high - level surface 21131 remains unchanged, and the starting height of the downward bending is located at the low - level surface 21132. This can reduce the flanging height, is more conducive to controlling the deformation amount of the initial arc edge 2111, and reduces the risk of edge tearing. Since the positioning holes 2221 are far from the position of the blank 211 and can only be used as the positioning benchmarks for the connection belt 22 and the mold, and there is only a narrow connection part 213 connecting the blank 211 and the connection belt 22, the relative position error between the blank 211 and the connection belt 22 will increase,继而 leading to an increase in the stamping error. Therefore, in order to improve the accuracy of subsequent processing, the positioning of the blank 211 is mainly completed by relying on the convex part 111 located at its center.

[0071] S7, shaping: taking the convex hull 111 and the two positioning holes 2221 as references, the entire blank 211 is molded and shaped, and the initial arcuate edge 2111 is deformed into an arcuate edge 131 . In the shaping step, a shaping mold 4 is used to shape the blank 211. The shaping mold 4 includes a shaping support block 41, a shaping pressure block 42 above the shaping support block 41, and a pair of side shaping blocks 43 located on the left and right sides respectively. The shaping support block 41 and the shaping pressure block 42 limit the upper and lower positions of the blank 211, and the two side shaping blocks 43 are used to perform over-pressure shaping on the outer side of the side portion 13. The XZ cross-section of the shaping support block 41 is a structure that is wide at the top and narrow at the bottom, and its side faces are inclined downward. The inner side faces of the side shaping blocks 43 are inclined faces that are inclined upward and opposite to the side faces of the shaping pressure blocks 42. The middle portion of the lower surface of the shaping pressure block 42 has a positioning groove 421 that matches the upper surface structure of the convex bump 111, and the middle portion of the upper surface of the shaping support block 41 has a positioning protrusion 411 that matches the lower surface structure of the convex bump 111. Fig. 9 shown.

[0072] The side surface 13 is obtained by deforming a part of the arc surface 2112 and two left and right opposite low-level surfaces 21132. The arc surface 2112 and the two low-level surfaces 21132 are not initially on the same plane, so the springback of the material after flanging needs to be considered. Therefore, another step of shaping is required to make the front and rear arc surfaces 2112 both vertical to meet the structural accuracy requirements. The shaping still needs to consider the springback of the material, so over-pressing is required. The design of the initial arc edge 2111 will take into account the deformation after flanging, so the initial arc edge 2111 after flanging will be very close to the arc edge 131.

[0073] like Fig.10 As shown, two auxiliary push rods 44 are arranged in the shaping support block 41, and the positions of the two auxiliary push rods 44 are mirror-symmetrical with respect to the XZ symmetry plane of the shaping support block 41. The upper ends of the auxiliary push rods 44 act on the lower surface of the arch bridge portion 11 and the structure is in an arc shape matching the arch bridge portion 11. Because the blank 211 is in an inverted U shape and the opening is retracted inward during the shaping step, it is easy to get stuck on the shaping support block 41, so the auxiliary push rods 44 are needed here to remove the material from the lower surface of the arch bridge portion 11. Because the position where the auxiliary push rods 44 act is the appearance surface of the product, the end structure needs to be designed into an arc shape along the structure of the arch bridge portion 11, so as to avoid excessive pressure to remove the material and cause indentations.

[0074] like Fig.11 As shown, the shaping step uses two main ejectors 45 to remove the material, and the removal position is located on the lower surface of the high surface 21131 and outside the pre-forming range of the flat plate portion 12. Because the material removal is located on the waste material, even if the removal force is large, there is no need to worry about damaging the appearance of the product. Similarly, the flanging step and the side punching step can also use the same removal position to remove the material, thereby ensuring the integrity of the product appearance.

[0075] S8, side punching: With the convex 111 and the two positioning holes 2221 as reference, side holes 131 are cut out on the two side parts 13. The side punching step is divided into three steps. In the first step, the side hole 132 on the front side part 13 is cut out by the first side punching die 5a. The second step is an empty step. In the third step, the side hole 132 on the rear side part 13 is cut out by the second side punching die 5b. Figure 5 and Fig.12 shown.

[0076] The side hole 132 is a through hole on the side portion 13. Because the material will always be deformed in the previous embossing and flanging steps, it is necessary to perform side punching after the flanging is completed. Considering the layout of the side punching die, only one side portion 13 can be cut at a time. In the flanging step, the blank 211 is formed into an inverted U-shaped structure with an opening facing downward, so the product is formed in an inverted manner, so that the side hole waste can fall directly downward. It is set as three steps because the first side punching die 5a and the second side punching die 5b need to be respectively provided with a side punch assembly 51 and a blanking assembly 52, and the positions cannot conflict with each other. The side punch assembly 51 shares a side push punch 53, and the two side punch assemblies 51 cannot be set together, but can only be separated by one station, and the two blanking assemblies 52 can only be set far away, so it is divided into three steps with an empty step in the middle.

[0077] S9, blanking: With the two positioning holes 2221 as reference, punch the high surface 21131 to form a U-shaped notch 121, obtain the flat plate portion 12, and disconnect the flat plate portion 12 from the connecting portion 213, and the solar tracking bracket 1 falls from the material strip 2. Figure 2 and Figure 5 shown.

[0078] The high surface 21131 is a preformed structure of the flat plate portion 12. In addition to the flat plate portion 12, the high surface 21131 is also connected to the connecting belt 22 through the connecting portion 213. Therefore, when the inner contour of the flat plate portion 12 is cut out, the solar tracking bracket 1 will be directly disconnected from the rest of the high surface 21131, thereby realizing blanking.

[0079] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A continuous stamping process for a solar tracking bracket, characterized in that: The solar tracking bracket is used to form a solar tracking bracket with a bridge structure, the solar tracking bracket includes an arch bridge portion, two flat plate portions located at both ends of the arch bridge portion and extending horizontally outward, and two side portions extending upward from the edges of the arch bridge portion and the flat plate portion, a convex bulge is provided in the middle of the arch bridge portion, the upper edge of the side portion is an arc edge, a U-shaped notch opening outward is provided on the flat plate portion, and a plurality of side holes are provided on the side portion, and the process steps include: S1. Punching: Provide a material strip, the processing unit range of the material strip includes a molding area located in the middle of the material strip and two connecting strips located on both sides of the material strip in the Y direction, and the material strip is conveyed step by step along the X direction, and then a positioning hole is punched in each connecting strip; S2, cutting the outer edge: taking the two positioning holes as reference, cutting out the blank and two connecting parts within the range of the forming area; the two connecting parts are located at the two ends of the blank in the Y direction; the blank is formed with initial arc edges on both sides in the X direction, and the two ends in the Y direction are respectively connected to the middle of the connecting part, the connecting part is a thin strip structure as a whole and a U-shaped deformation belt is formed on both sides connected to the blank, and the two free ends of the connecting part are connected to the inner side of the same connecting belt; S3, chamfering: taking the two positioning holes as reference, a chamfer is pressed on the lower edge of the initial arc-shaped edge to eliminate burrs generated by the initial arc-shaped edge during punching and forming; S4, arching: with two positioning holes as reference, the middle part of the blank is deformed into a downwardly concave arc surface, and a flat plate structure is formed at both ends of the blank in the Y direction, the flat plate structure has a high surface and two low surfaces, the two low surfaces are symmetrically connected to the two sides of the high surface in the X direction, and the low surface and the high surface are smoothly transitioned through the arc surface, the middle part of the connecting part is connected to the outer edge of the high surface, and during the forming of the arc surface, the U-shaped deformation band is stretched in the Y direction, providing a deformation amount for the follow-up of the connecting part during the forming of the arc surface; S5, punching convexity in steps: using the two positioning holes as reference, punching a first convexity upwards in the middle of the arc-shaped surface, wherein the first convexity is larger in scope than the convexity and lower in height than the convexity, and then the convexity is obtained by pulling up and shrinking the opening for multiple times; S6, flanging: taking the convex hull and the two positioning holes as reference, folding down the two side portions of the arc surface in the X direction and the two low-position surfaces connected to it in the Y direction to form the side portions, the initial arc edge is deformed into the arc edge, and the unfolded portion in the middle of the arc surface forms the arch bridge portion; S7, shaping: taking the convex bulge and the two positioning holes as reference, the entire blank is molded and shaped so that the two side surfaces are in an upright state; S8, side punching: taking the convex bulge and the two positioning holes as reference, cutting out the side holes on the upper sides of the two side parts; S9, blanking: using the two positioning holes as a reference, punching the high surface to form the U-shaped notch to obtain the flat plate portion, while the flat plate portion is disconnected from the connecting portion, and the solar tracking bracket falls from the material strip.

2. The continuous stamping process of the solar tracking bracket according to claim 1 is characterized in that: The connecting belt includes connecting sections and positioning sections that are alternately distributed, the positioning hole is located in the positioning section, and the connecting portion is connected to the connecting section; the connecting section is a slender strip structure, and the positioning section protrudes from the inner edge of the connecting section to provide sufficient strength for the structure of the positioning hole; in the arching step, a pair of positioning blocks are used to block the inner edge of the connecting section to prevent the connecting section from being deformed when the U-shaped deformation belt is stretched in the Y direction.

3. The continuous stamping process of the solar tracking bracket according to claim 1 is characterized in that: The outer edge cutting step is completed through two trimming steps. The first trimming step cuts out the inner contour of the connecting part and removes part of the partition material between adjacent blanks to form the middle arc segment of the initial arc edge. The second trimming step removes the remaining partition material between adjacent blanks to form two edge arc segments of the initial arc edge. The two edge arc segments are adjacent to the two ends of the middle arc segment. The middle arc segment and the edge arc segment together constitute the initial arc edge.

4. The continuous stamping process for a solar tracking bracket according to claim 3 is characterized in that: The curvature radii of the two edge arc segments are equal and greater than the curvature radius of the middle arc segment.

5. The continuous stamping process of the solar tracking bracket according to claim 4 is characterized in that: The step-by-step embossing process is divided into five steps, the convex hull of the latter step is smaller in range and higher in height than the convex hull of the former step, and the diameter of the first convex hull is greater than the width of the arch bridge portion.

6. The continuous stamping process of the solar tracking bracket according to claim 1 is characterized in that: In the arching step, the width of the high surface is equal to the width of the arch bridge portion.

7. The continuous stamping process of the solar tracking bracket according to claim 1 is characterized in that: In the shaping step, a shaping mold is used to shape the blank, and the shaping mold includes a shaping support block, a shaping pressure block above the shaping support block, and a pair of side shaping blocks respectively located on the left and right sides. The shaping support block and the shaping pressure block limit the upper and lower positions of the blank, and two side shaping blocks are used to over-press and shape the outer sides of the side parts. The XZ cross-section of the shaping support block is a structure that is wide at the top and narrow at the bottom, and its side faces are inclined downward. The inner side faces of the side shaping blocks are upwardly inclined inclined surfaces opposite to the side faces of the shaping support block. The middle part of the lower surface of the shaping pressure block has a positioning groove that matches the upper surface structure of the convex hull, and the middle part of the upper surface of the shaping support block has a positioning protrusion that matches the lower surface structure of the convex hull.

8. The continuous stamping process for a solar tracking bracket according to claim 7, characterized in that: Two auxiliary push rods are arranged in the shaping support block, and the positions of the two auxiliary push rods are mirror-symmetrical with respect to the XZ symmetry plane of the shaping support block. The upper ends of the auxiliary push rods act on the lower surface of the arch bridge part, and the upper ends of the auxiliary push rods are in an arc-shaped structure matching the arch bridge part.

9. The continuous stamping process of the solar tracking bracket according to claim 1, characterized in that: The side punching step is divided into three steps. The first step is to cut out the side hole on the front side portion, the second step is an empty step, and the third step is to cut out the side hole on the rear side portion.

10. The continuous stamping process of the solar tracking bracket according to claim 1, characterized in that: Two main ejector pins are used to remove the material in the flanging step to the side punching step, and the material removal position is located on the lower surface of the high-level surface and outside the pre-forming range of the flat plate part.

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