A continuous forming die for making a bent workpiece

Abstract

The application discloses a continuous forming die for preparing a bent workpiece, and further comprises a bending rotary die assembly; seven work stations for processing the workpiece are arranged between an upper stripper plate and a lower die plate; at a bending cutting station, a left edge cutting punch and a right edge cutting punch are respectively arranged on the left side and the right side of the upper clamping plate; the bending rotary die assembly comprises a swing block and a rotating shaft; the rotating shaft penetrates through the swing block from left to right, and the left end and the right end of the rotating shaft are respectively rotatably arranged close to the rear end frame of the upper stripper plate; the lower part of the swing block is an empty space, the bottom of the swing block is exposed downward below the upper stripper plate, the rear end surface of the lower die plate and the front end surface of the bottom of the swing block are both arc surfaces, and a gap is arranged between the rear end surface of the lower die plate and the front end surface of the bottom of the swing block; the workpiece can be prepared to have a front half part located on a horizontal plane and a rear half part bent downward, the bending post-processing procedure of the workpiece can be omitted, the processing work efficiency of the bent workpiece is improved, and the processing cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of hardware mold technology, and in particular to a continuous forming mold for preparing bent workpieces. Background Technology

[0002] With industrial development, the demand for personalized home appliances is increasing. Curved designs have better aesthetic appeal, resulting in a large demand for the processing of bent hardware components.

[0003] Existing continuous forming dies can use punches, upper protruding inserts, and lower concave inserts to process sheet metal parts, punching, bending, or forming concave and convex shapes on both sides of the workpiece. Since the bent workpiece cannot move in the die, the bending process cannot be completed during continuous processing. A separate bending process needs to be set up after the continuous forming die to bend the workpiece again, which reduces the efficiency of workpiece forming and increases the processing cost. Summary of the Invention

[0004] To address the aforementioned problems, the present invention aims to provide a continuous forming die for preparing bent workpieces, which can complete the forming and bending processes of the workpiece through seven consecutive strokes, eliminating the need for post-bending processing steps and reducing processing costs.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A continuous forming die for preparing bent workpieces includes an upper die assembly and a lower die assembly; the upper die assembly includes an upper die base, an upper pad, an upper clamping plate, an upper stop plate, and an upper stripping plate suspended from top to bottom on an upper die frame; the lower die assembly includes a lower template, a lower pad, and a lower die base mounted from top to bottom on a stamping platform; and also includes a bending and rotating die assembly.

[0007] Between the upper stripper plate and the lower template, from front to back, there are sequentially arranged punching and folding stations, forming stations, cutting and punching stations, folding and turning stations, turning and punching stations, folding stations, and bending and cutting stations for processing workpieces; the bending and rotating mold assembly is installed at the bending and cutting station and close to the rear end of the upper clamping plate.

[0008] In the bending and cutting station, a left edge cutting punch and a right edge cutting punch are respectively installed on the left and right sides of the upper clamping plate. The lower ends of the left edge cutting punch and the right edge cutting punch pass downward through the upper stop plate and the upper stripping plate respectively and cut off the rear end portions of the left and right edges of the workpiece.

[0009] The bending and rotating die assembly comprises a swing block and a rotating shaft; the rotating shaft penetrates the swing block from left to right, and the left and right ends of the rotating shaft are rotatably arranged near the rear end frame of the upper stripper plate; the lower part of the swing block is an empty space, and the bottom of the swing block is exposed below the upper stripper plate; the rear end surface of the lower die plate and the front end surface of the bottom of the swing block are arc-shaped surfaces that match each other, and a gap is arranged between the rear end surface of the lower die plate and the front end surface of the bottom of the swing block.

[0010] Further, the bending and rotating die assembly further comprises a spring pin, a rear baffle, a fixed plate and two side baffles;

[0011] The top surface of the swing block is provided with a concave spring pin groove, and the fixed plate is provided with a spring pin through hole;

[0012] The top of the fixed plate is elastically suspended on the bottom surface of the upper die seat, the top of the rear baffle and the top of the two side baffles are fixed to the bottom surface of the fixed plate, the fixed plate is located above the swing block, the rear baffle is located behind the swing block, and the left and right ends of the rotating shaft are rotatably arranged on the two opposite surfaces of the two side baffles;

[0013] The upper die seat is provided with a spring pin fixing hole, the bottom of the spring pin fixing hole is in communication with the top of the spring pin through hole, the top of the spring pin is arranged in the spring pin fixing hole, the lower end of the spring pin penetrates the spring pin through hole downward and abuts against the groove bottom of the spring pin groove, and the outer side surface of the spring pin is sleeved with a spring, and the top end and the bottom end of the spring abut against the top of the spring pin fixing hole and the top surface of the fixed plate respectively.

[0014] Further, in the punching and flanging station, the upper clamping plate is provided with two groups of first edge hole punches, a pair of first flanging punches, a pair of positioning hole punches and a first left edge hole punch;

[0015] The two groups of first edge hole punches are respectively used for punching right edge holes and front edge holes on the workpiece, the right edge holes and the front edge holes are both discontinuously arranged long strip-shaped holes, and the right edge holes and the front edge holes are respectively located on the right edge and the front edge of the workpiece;

[0016] The pair of first flanging punches are respectively used for downwardly pressing and flanging the edges of the left and right edges of the workpiece to form a left guide edge and a right guide edge;

[0017] The pair of positioning hole punches are used for punching the workpiece to form two positioning holes, and the two positioning holes are located in the middle part of the workpiece and are separated by a certain distance; and the first left edge hole punch is used for punching the workpiece to form a first left edge hole, and the first left edge hole is located between the positioning holes and the left guide edge;

[0018] The upper die plate is hardened, and the top end of the left edge cutting punch, the top end of the right edge cutting punch, the top end of the first edge hole punch, the top end of the first flanging punch, the top end of the positioning hole punch and the top end of the first left edge hole punch are respectively located on the bottom surface of the upper die plate;

[0019] The upper stop plate and the upper stripper plate are respectively provided with a plurality of through holes, and the plurality of through holes are respectively one-to-one corresponding to the left edge cutting punch, the right edge cutting punch, the first edge hole punch, the first flanging punch, the positioning hole punch and the first left edge hole punch;

[0020] During mold opening and closing, the left edge cutting punch, the right edge cutting punch, the first edge hole punch, the first flanging punch, the positioning hole punch and the first left edge hole punch move up and down in the corresponding through holes.

[0021] Further, in the profiling station, the upper clamp plate is provided with a middle hole punch; the bottom surface of the upper stripper plate is provided with an upwardly recessed front plate surface profiling groove, a rear plate surface profiling groove and a middle hole profiling groove;

[0022] The middle hole punch is used for stamping the front half of the workpiece to form a ring-shaped middle cutout;

[0023] The front plate surface profiling groove and the rear plate surface profiling groove are respectively used for pressing the front half and the rear half of the workpiece to form an upwardly convex front upper convex surface and a rear upper convex surface with a ring-shaped reinforcing rib; the middle hole profiling groove is used for pressing the part in the middle cutout of the workpiece to form a profiling plane; the ring-shaped reinforcing rib on the front upper convex surface surrounds the left and right two positioning holes respectively, and the profiling plane is located between the two positioning holes.

[0024] Further, in the edge cutting and punching station, the upper clamp plate is provided with a first special-shaped hole punch, a second special-shaped hole punch and a second left edge hole punch;

[0025] The bottom surface of the upper stripper plate is provided with an upwardly recessed first stripper groove and a second stripper groove, and the first stripper groove and the second stripper groove are respectively matched with the shape and size of the front upper convex surface and the rear upper convex surface;

[0026] The first and second profiled hole punches are used to punch around the two left and right spaced apart positioning holes of the workpiece to form a first profiled hole and a second profiled hole cutout; the left side of the first profiled hole is connected with the middle cutout, the front and back sides of the first profiled hole are relatively close to each other, and the left side of the second profiled hole cutout is connected with the first left hole; the second left hole punch is used to punch the position between the first left hole and the left material guide edge of the workpiece to form a second left hole.

[0027] Further, the upper clamping plate is provided with a first left edge cutting punch, and the bottom surface of the upper stripper plate is provided with a first profiled hole edge recess, a second profiled hole flanging recess and a second profiled hole edge pressing recess;

[0028] The first left edge cutting punch is used to punch the part between the left material guide edge and the back upper convex surface of the workpiece to form a first left through hole in a strip shape.

[0029] The lower die plate is respectively provided with three upper convex inserts matched with the shape and size of the first profiled hole edge recess, the second profiled hole flanging recess and the second profiled hole edge pressing recess; two of the upper convex inserts are matched with the first profiled hole edge recess and press the edges of the close-together parts of the front and back sides of the first profiled hole to form a pair of right flanging edges which are folded upward; the remaining one upper convex insert is matched with the second profiled hole flanging recess and the second profiled hole edge pressing recess and presses the right part in the second profiled hole cutout to form a left flanging edge which is folded upward and obliquely.

[0030] Further, the upper clamping plate is provided with a second left edge cutting punch, and the bottom surface of the upper stripper plate is provided with a second profiled hole flanging recess;

[0031] The lower die plate is respectively provided with a first recess matched with the second left edge cutting punch and a fourth upper convex insert matched with the second profiled hole flanging recess;

[0032] The second left edge cutting punch is used to punch downward the left edge of the workpiece to form a second left through hole, and the rear end of the second left through hole is connected with the front end of the first left through hole;

[0033] The second profiled hole flanging recess is used to cooperate with the upper convex insert to press the edge of the second profiled hole cutout and make it fold upward to form a left flanging hole.

[0034] Further, the upper clamping plate is provided with a front edge punch, and the bottom surface of the upper stripper plate is provided with a front edge flanging recess;

[0035] The lower template is provided with a second groove that matches the front punch and a fifth upper protruding insert that matches the front folded edge groove;

[0036] The front punch is used to punch downwards on both sides of the front hole to form a second front hole; the front folded groove cooperates with the corresponding upper protruding insert and folds upwards on both sides of the second front hole to form a front folded hole.

[0037] Furthermore, at the bending and cutting station, the upper clamping plate is also equipped with a third left-side cutting punch and a right-side cutting punch;

[0038] The upper ejector plate is provided with a downwardly protruding flange insert, and the lower template is provided with a clearance hole. The clearance hole corresponds to and matches the flange insert, and the clearance hole and the flange insert are respectively located below and above the first irregular hole.

[0039] The left edge cutting punch and the right edge cutting punch are used to punch and cut off the left guide edge and the right guide edge, respectively, to form a left cut and a right cut; the third left edge cutting punch is used to punch and cut off the front and rear ends of the left side of the left folded edge to form a third left through hole; the right edge cutting punch is used to punch and cut off the right side of the front upper convex surface to form a right through hole.

[0040] The flanged insert is inserted downward into the first irregular hole, causing the four edges of the first irregular hole to fold downward, and causing the pair of right flanges that originally protruded upward to follow the four edges and flip downward to become a pair of right flanges facing each other.

[0041] The beneficial effects of the above-mentioned technical solution of the present invention are as follows: The continuous forming mold for preparing bent workpieces is provided with a punching and folding station, a pressing station, a cutting and punching station, a folding and turning station, a turning and punching station, a folding station, and a bending and cutting station. In the bending and cutting station, the rear half of the workpiece can be clamped in the gap between the rear end face of the lower template and the front end face of the bottom of the swing block, so as to make a workpiece with the front half located on the horizontal plane and the rear half bent downward, thereby eliminating the post-bending processing steps of the workpiece, thereby improving the processing efficiency of bent workpieces and reducing processing costs. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the closed state of the continuous forming die for preparing bent workpieces according to the present invention;

[0043] Figure 2 yes Figure 1 Top view of the upper clamping plate;

[0044] Figure 3 yes Figure 1Top view of the upper ejector plate;

[0045] Figure 4 This is a schematic diagram of the bending and rotating module assembly.

[0046] Figure 5 for Figure 4 A top view of the pendulum block;

[0047] Figure 6 This is a schematic diagram of the forming process of the tape to be processed at seven stations;

[0048] The station includes: punching and folding station 1; forming station 2; trimming and punching station 3; folding and flanging station 4; flanging and punching station 5; folding station 6; bending and cutting station 7; upper mold base 11; upper pad plate 12; upper clamping plate 13; upper stop plate 14; upper stripping plate 15; lower template 21; lower pad plate 22; lower mold base 23; bending and rotating mold assembly 30; spring pin 31; swing block 32; rear baffle 33; two side baffles 34; rotating shaft 35; fixing plate 36; workpiece 41; spring pin fixing hole 111; spring pin groove 321; spring pin through hole 361. First side hole punch 1311; First folding punch 1312; Positioning hole punch 1313; First left side hole punch 1314; Center hole punch 1321; First irregular hole punch 1331; Second irregular hole punch 1332; Second left side hole punch 1333; First left side cutting edge punch 1341; Second left side cutting edge punch 1351; Front punch 1361; Third left side cutting edge punch 1371; Right side cutting edge punch 1372; Left edge cutting punch 1373; Right edge cutting punch 1374; Front plate surface 1521 forming groove; 1522 forming groove on the back plate; 1523 forming groove for the center hole; 1531 first stripper groove; 1532 second stripper groove; 1541 second irregular hole flange groove; 1542 second irregular hole edge groove; 1543 first irregular hole edge groove; 1551 second irregular hole flange groove; 1561 front edge groove; 1571 flange insert; 4111 right hole; 4112 front hole; 4113 guide edge; 4114 left guide edge; 4115 right positioning hole; 4115 first left hole. 16; Front upper convex surface 4121; Rear upper convex surface 4122; Center cut 4123; Pressed plane 4124; First irregular hole 4131; Second irregular hole cut 4132; Second left side hole 4133; Left folded edge 4141; First left side through hole 4142; Right folded edge 4143; Second left side through hole 4151; Left folded edge hole 4152; Second front side hole 4161; Front folded edge hole 4162; Third left side through hole 4171; Right side through hole 4172; Left side cut 4173; Right side cut 4174. Detailed Implementation

[0049] The following is in conjunction with the appendix Figures 1-6The technical solution of the present invention will be further illustrated through specific embodiments.

[0050] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0051] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0053] A continuous forming die for preparing bent workpieces includes an upper die assembly and a lower die assembly; the upper die assembly includes an upper die base 11, an upper pad 12, an upper clamping plate 13, an upper stop plate 14, and an upper release plate 15 suspended from top to bottom on an upper die frame; the lower die assembly includes a lower template 21, a lower pad 22, and a lower die base 23 mounted from top to bottom on a stamping platform; and also includes a bending and rotating die assembly 30.

[0054] Between the upper stripper plate 15 and the lower template 21, from front to back, there are sequentially arranged punching and folding station 1, forming station 2, cutting and punching station 3, folding and turning station 4, turning and punching station 5, folding station 6 and bending and cutting station 7 for processing workpiece 41; the bending and rotating mold assembly 30 is installed at the bending and cutting station 7 and close to the rear end of the upper clamping plate 13;

[0055] In the bending and cutting station 7, a left edge cutting punch 1373 and a right edge cutting punch 1374 are respectively installed on the left and right sides of the upper clamping plate 13. The lower ends of the left edge cutting punch 1373 and the right edge cutting punch 1374 pass downward through the upper stop plate 14 and the upper stripping plate 15 respectively and cut off the rear end portions of the left and right edges of the workpiece 41.

[0056] The bending and rotating mold assembly 30 includes a swing block 32 and a rotating shaft 35; the rotating shaft 35 passes through the swing block 32 from left to right, and the left and right ends of the rotating shaft 35 are rotatably mounted close to the rear end of the upper ejector plate 15; there is a clearance space below the swing block 32, and the bottom of the swing block 32 is exposed downwards below the upper ejector plate 15; the rear end face of the lower template 21 and the front end face of the bottom of the swing block 32 are mutually fitting arc-shaped surfaces, and there is a gap between the rear end face of the lower template 21 and the front end face of the bottom of the swing block 32.

[0057] Figure 1 The image shows the continuous forming die of the present invention for preparing bent workpieces in the closed state. Figure 4 This is a schematic diagram of the bending and rotating mold assembly 30. Figure 6 This is a schematic diagram of the forming process of workpiece 41 at seven stations.

[0058] In the continuous forming die for preparing bent workpieces described in this invention, during operation, the automatic feeder rotates intermittently according to the station step length, thereby pushing the rear end portion of the roll to be processed, i.e., workpiece 41, from front to back between the upper stripper 15 and the lower template 21. Workpiece 41 sequentially enters the punching and folding station 1, the forming station 2, the trimming and punching station 3, the folding and turning station 4, the turning and punching station 5, the folding station 6, and the bending and cutting station 7. When workpiece 41 enters the bending and cutting station 7 and the die is closed, the rear end portions of the left and right sides of the workpiece 41, which are used for guiding the material, are respectively... The edge cutting punch 1373 and the right edge cutting punch 1374 cut off the workpiece. At the same time, the rear half of the workpiece 41, whose left and right edges have been cut off, is pressed down by the bottom of the downward swing block 32. Then the swing block 32 rotates along the rotating shaft 35 and clamps the rear half of the workpiece 41 in the gap between the rear end face of the lower template 21 and the front end face of the bottom of the swing block 32, thus making the workpiece 41 with the front half in the horizontal plane and the rear half bent downward. This can eliminate the post-bending processing steps of the workpiece 41, thereby improving the processing efficiency of the bent workpiece and reducing the processing cost.

[0059] As is the conventional design of the prior art, the lower template 21 is provided with two corresponding grooves, which are used to cooperate with the lower end of the left edge cutting punch 1373 and the lower end of the right edge cutting punch 1374.

[0060] Furthermore, the bending and rotating mold assembly 30 also includes a spring pin 31, a rear baffle 33, a fixing plate 36, and two side baffles 34;

[0061] The top surface of the swing block 32 is provided with a recessed spring nail groove 321, and the fixing plate 36 is provided with a spring nail through hole 361;

[0062] The top of the fixed plate 36 is elastically suspended from the bottom surface of the upper mold base 11. The top of the rear baffle 33 and the tops of the two side baffles 34 are respectively fixed to the bottom surface of the fixed plate 36. The fixed plate 36 is located above the swing block 32, and the rear baffle 33 is located behind the swing block 32. The left and right ends of the rotating shaft 35 are rotatably mounted on the two opposite surfaces of the two side baffles 34.

[0063] The upper mold base 11 has a spring pin fixing hole 111. The bottom of the spring pin fixing hole 111 is connected to the top of the spring pin through hole 361. The top of the spring pin 31 is installed in the spring pin fixing hole 111. The lower end of the spring pin 31 passes downward through the spring pin through hole 361 and abuts against the bottom of the spring pin groove 321. A spring is fitted on the outer side of the spring pin 31. The top and bottom ends of the spring abut against the top of the spring pin fixing hole 111 and the top surface of the fixing plate 36, respectively.

[0064] like Figure 1 and Figure 4 As shown, similar to the suspension setup of the upper mold assembly in the prior art, nitrogen springs are provided between the upper pad 12 and the upper mold base 11, and between the fixed plate 36 and the upper mold base 11. The fixed plate 36 moves up and down with the opening and closing of the continuous forming mold used to prepare bent workpieces. When the mold is closed, the upper mold base 11 moves downward, and the upper ejector plate 15 and the lower template 21 abut against the top and bottom surfaces of the workpiece 41, respectively. Under the action of the nitrogen springs, the fixed plate 36 moves upward toward the upper mold base 11, and the spring pin 31 pushes the swing block 32 downward to rotate counterclockwise along the rotating shaft 35. The rear half of the workpiece 41 enters the rear end face of the lower template 21 and the bottom of the swing block 32. The gap between the front faces of the upper and lower mold plates is such that when the upper mold plate moves downward, the rear face of the lower mold plate 21 and the front face of the bottom of the swing block 32 clamp the rear half of the workpiece 41 to complete the shaping of the bent part. Conversely, when the mold opens, the mold base 11 moves upward, the upper ejector plate 15 and the lower mold plate 21 separate from the top and bottom surfaces of the workpiece 41 respectively. Under the action of the nitrogen spring, the fixing plate 36 moves away from the upper mold base 11 and resets, causing the spring nail 31 to retract upward, so that the swing block 32 rotates clockwise along the rotating shaft 35. The top surface of the swing block 32 resets, and the spring nail groove 321 approaches the bottom surface of the fixing plate 36. Thus, the swing block 32 completes one working cycle.

[0065] Furthermore, in the punching and folding station 1, the upper clamping plate 13 is equipped with two sets of first side hole punches 1311, a pair of first folding punches 1312, a pair of positioning hole punches 1313, and a first left side hole punch 1314.

[0066] The two sets of first side hole punches 1311 are respectively used to open a right side hole 4111 and a front side hole 4112 on the workpiece 41. The right side hole 4111 and the front side hole 4112 are both elongated holes arranged intermittently, and the right side hole 4111 and the front side hole 4112 are located on the right side and the front side of the workpiece 41, respectively.

[0067] A pair of first folding punches 1312 are used to press down the left and right edges of the workpiece 41 to form a left guide edge 4114 and a right guide edge 4113.

[0068] A pair of positioning hole punches 1313 are used to punch the workpiece 41 and open two positioning holes 4115, the two positioning holes 4115 being located at the middle of the workpiece 41 with the left and right holes spaced apart; the first left hole punch 1314 is used to punch the workpiece 41 and open a first left hole 4116, the first left hole 4116 being located between the positioning holes 4115 and the left guide edge 4114;

[0069] The upper pad 12 is hardened, and the top of the left edge cutting punch 1373, the top of the right edge cutting punch 1374, the top of the first side hole punch 1311, the top of the first folding punch 1312, the top of the positioning hole punch 1313, and the top of the first left side hole punch 1314 respectively abut against the bottom surface of the upper pad 12.

[0070] The upper stop plate 14 and the upper stripping plate 15 are respectively provided with a plurality of through holes, and the plurality of through holes correspond one-to-one with the left edge cutting punch 1373, the right edge cutting punch 1374, the first side hole punch 1311, the first folding punch 1312, the positioning hole punch 1313 and the first left side hole punch 1314.

[0071] When the mold is opened and closed, the left edge cutting punch 1373, the right edge cutting punch 1374, the first side hole punch 1311, the first folding punch 1312, the positioning hole punch 1313, and the first left side hole punch 1314 move up and down in the corresponding through holes.

[0072] like Figures 1-3As shown in Figure 6, the left guide edge 4114 and right guide edge 4115 formed by the downward fold not only serve as reinforcing ribs to enhance the tensile strength of the workpiece 41 and prevent deformation of the workpiece 41 during the forming process, but also, with two corresponding guide grooves set at the corresponding positions of the lower mold base 21, the left guide edge 4114 and right guide edge 4115 can move backward along the two guide grooves under the push of the automatic feeder, thereby avoiding the phenomenon of misalignment and improving the pass rate of the workpiece 41 in the forming process; by opening the first left side hole 4116 and two positioning holes 4115, it is convenient for the subsequent station to open irregular holes around the first left side hole 4116 and the two positioning holes 4115, so as to improve the convenience and accuracy of the workpiece 41 in the processing positioning.

[0073] The upper pad 12 is hardened so that the top of each punch installed on the upper clamping plate 13 rests against the bottom surface of the upper pad 12, which can effectively decompose the reverse impact force generated when each punch presses the workpiece 41; multiple corresponding through holes are provided on the upper stop plate 14 and the upper stripper plate 15, which can guide each punch and prevent each punch from bending and deforming, thereby improving the processing quality and service life of the continuous forming die used to prepare bent workpieces.

[0074] Furthermore, at the forming station 2, the upper clamping plate 13 is equipped with a center hole punch 1321; the bottom surface of the upper release plate 15 is provided with an upwardly recessed front plate forming groove 1521, a rear plate forming groove 1522 and a center hole forming groove 1523.

[0075] The center hole punch 1321 is used to punch the front half of the workpiece 41 to form an annular center cut 4123;

[0076] The front plate forming groove 1521 and the rear plate forming groove 1522 are used to press the front half and the rear half of the workpiece 41, respectively, to form an upwardly protruding front upper convex surface 4121 and a rear upper convex surface 4122 with annular reinforcing ribs; the center hole forming groove 1523 is used to press the part inside the center cut 4123 of the workpiece 41 to form a forming plane 4124; the annular reinforcing ribs on the front upper convex surface 4121 surround the two positioning holes 4115 spaced apart on the left and right, and the forming plane 4124 is located between the two positioning holes 4115.

[0077] like Figures 1-3 As shown in Figure 6, the front and rear halves of the workpiece 41 located at the forming station 2 are processed and formed by the forming groove 1521 on the front plate and the forming groove 1522 on the rear plate, so that the front and rear halves of the workpiece 41 obtain annular reinforcing ribs, forming a front upper convex surface 4121 and a rear upper convex surface 4122, thereby improving the tensile strength of the workpiece 41.

[0078] Correspondingly, the top surface of the lower template 21 is provided with an upper protruding insert that corresponds to the front plate forming groove 1521, the rear plate forming groove 1522 and the center hole forming groove 1523, respectively, and an annular groove that corresponds to the center hole punch 1321.

[0079] Furthermore, at the cutting and punching station 3, the upper clamping plate 13 is equipped with a first irregular hole punch 1331, a second irregular hole punch 1332, and a second left side hole punch 1333.

[0080] The bottom surface of the upper stripping plate 15 is provided with an upwardly recessed first stripping groove 1531 and a second stripping groove 1532, the first stripping groove 1531 and the second stripping groove 1532 respectively matching the shape and size of the front upper convex surface 4121 and the rear upper convex surface 4122.

[0081] The first irregular hole punch 1331 and the second irregular hole punch 1332 are respectively used to punch around the two positioning holes 4115 spaced apart on the left and right sides of the workpiece 41 to open the first irregular hole 4131 and the annular second irregular hole cut 4132; the left side of the first irregular hole 4131 is connected to the center cut 4123, and the front and rear sides of the first irregular hole 4131 are relatively close to each other, and the left side of the second irregular hole cut 4132 is connected to the first left hole 4116; the second left hole punch 1333 is used to punch the position between the first left hole 4116 and the left guide edge 4114 of the workpiece 41 to form the second left hole 4133.

[0082] like Figures 1-3 As shown in Figure 6, at the edge cutting and punching station 3, a first irregular hole 4131 and an annular second irregular hole cut 4132 are made to facilitate subsequent stations to perform flanging or folding treatment on the edges of the first irregular hole 4131 and the annular second irregular hole cut 4132.

[0083] A corresponding stripping groove is provided on the bottom surface of the upper stripping plate 15 to avoid the corresponding upper protruding forming part, thereby avoiding interference that could cause deformation of the formed part.

[0084] Furthermore, at the folding and turning station 4, the upper clamping plate 13 is equipped with a first left-side cutting punch 1341, and the bottom surface of the upper release plate 15 is provided with an upwardly recessed first irregular hole edge groove 1543, a second irregular hole turning groove 1541, and a second irregular hole pressing groove 1542.

[0085] The first left-side cutting punch 1341 is used to punch the portion between the left guide edge 4114 and the rear upper convex surface 4122 of the workpiece 41 to open a strip-shaped first left-side through hole 4142.

[0086] The lower template 21 is provided with three upper protruding inserts that match the shape and size of the first irregular hole edge groove 1543, the second irregular hole flipping groove 1541, and the second irregular hole pressing groove 1542. Two of the upper protruding inserts cooperate with the first irregular hole edge groove 1543 and press the edges of the converging parts of the front and rear sides of the first irregular hole 4131 to form a pair of right folded edges 4143 that fold upward. The remaining upper protruding insert cooperates with the second irregular hole flipping groove 1541 and the second irregular hole pressing groove 1542 and presses the right side part inside the second irregular hole cut 4132 to form a left folded edge 4141 that folds upward at an angle.

[0087] like Figures 1-3 As shown in Figure 6, at the folding and flanging station 4, the edges of the first irregular hole 4131 and the edges of the second irregular hole cut 4132 are folded and formed. After forming, the pair of right folded edges 4143 and left folded edges 4141 both protrude upwards, which will not hinder the backward movement of the roll, thereby avoiding affecting the workpiece 41 entering the next station.

[0088] The first left through hole 4142 partially cuts off the connection between the left guide edge 4114 and the left side of the rear upper convex surface 4122, preparing for the subsequent bending process of the rear upper convex surface 4122.

[0089] Furthermore, at the flanging and punching station 5, the upper clamping plate 13 is equipped with a second left-side cutting punch 1351, and the bottom surface of the upper stripping plate 15 is provided with an upwardly recessed second irregular hole flanging groove 1551.

[0090] The lower template 21 is provided with a first groove that cooperates with the second left side cutting punch 1351 and a fourth upper protruding insert that cooperates with the second irregular hole flange groove 1551;

[0091] The second left-side cutting punch 1351 is used to punch the left side of the workpiece 41 downward to form a second left-side through hole 4151. The rear end of the second left-side through hole 4151 is connected to the front end of the first left-side through hole 4142.

[0092] The second irregular hole flange groove 1551 is used to cooperate with the upper protruding insert to press the edge of the second irregular hole cut 4132 and fold it upward to form the left flange hole 4152.

[0093] like Figures 1-3As shown in Figure 6, at the flanging and punching station 5, the second left-side cutting punch 1351 punches downward to form a second left-side through hole 4151. The rear end of the second left-side through hole 4151 is connected to the first left-side through hole 4142, cutting off the connection between the left guide edge 4114 and the left side of the rear upper convex surface 4122. The second left-side cutting punch 1351 cooperates with the corresponding upper convex insert provided on the lower template 21 to fold the edge of the second irregular hole cut 4132 upward to form the left flanging hole 4152.

[0094] Furthermore, at the folding station 6, the upper clamping plate 13 is equipped with a front punch 1361, and the bottom surface of the upper stripping plate 15 is provided with an upwardly recessed front folding groove 1561.

[0095] The lower template 21 is provided with a second groove that matches the front punch 1361 and a fifth upper protruding insert that matches the front folded edge groove 1561;

[0096] The front punch 1361 is used to punch the front and rear sides of the front hole 4112 downward to form the second front hole 4161; the front folded groove 1561 cooperates with the corresponding upper protruding insert and folds the front and rear sides of the second front hole 4161 upward to form the front folded hole 4162.

[0097] like Figures 1-3 As shown in Figure 6, at the folding station 6, after the front punch 1361, the front folding groove 1561 and the corresponding upper convex insert forming process, part of the coil material between the front upper convex surface 4121 and the front rear upper convex surface 4122 is cut off; the workpiece 41 located at the folding station 6 and the workpiece 41 located at the flanging punching station 5 can still be connected through the edge portions on the left and right sides so as to continue the forming process of the next station.

[0098] Furthermore, at the bending and cutting station 7, the upper clamping plate 13 is also equipped with a third left cutting punch 1371 and a right cutting punch 1372.

[0099] The upper stripper plate 15 is provided with a downwardly protruding flange insert 1571, and the lower template 21 is provided with a clearance hole. The clearance hole corresponds to and matches the flange insert 1571. The clearance hole and the flange insert 1571 are respectively located below and above the first irregular hole 4131.

[0100] The left edge cutting punch 1373 and the right edge cutting punch 1374 are used to punch and cut off the left guide edge 4114 and the right guide edge 4113, respectively, to form a left cut 4173 and a right cut 4174; the third left edge cutting punch 1371 is used to punch and cut off the front and rear ends of the left side of the left folded edge 4141 to form a third left through hole 4171; the right edge cutting punch 1372 is used to punch and cut off the right side of the front upper convex surface 4121 to form a right through hole 4172;

[0101] The flanged insert 1571 is inserted downward into the first irregular hole 4131, causing the four edges of the first irregular hole 4131 to fold downward, and causing the pair of right flanges 4143 that originally protruded upward to follow the four edges and fold downward to become a pair of right flanges 4143 facing each other.

[0102] like Figures 1-3 As shown in Figure 6, at the bending and cutting station 7, the front edge and the left and right sides of the front upper convex surface 4121 of the strip are cut off. When the mold is opened, the rear end face of the lower template 21 and the swing block 32 are separated from the rear upper convex surface 4122 respectively. The bent workpiece 41 can be smoothly taken out from the bending and cutting station 7. The cut-off parts of the left guide edge 4114 and the right guide edge 4113 fall into the waste collection box. Thus, the work cycle of the seven stations is completed.

[0103] In summary, such as Figures 1-6 The embodiment of the present invention shown includes a continuous forming die for preparing bent workpieces, comprising a punching and folding station 1, a pressing station 2, a cutting and punching station 3, a folding and flanging station 4, a flanging and punching station 5, a folding station 6, and a bending and cutting station 7. At the bending and cutting station 7, the rear half of the workpiece 41 can be clamped in the gap between the rear end face of the lower template 21 and the front end face of the bottom of the swing block 32, forming a workpiece 41 with the front half in a horizontal plane and the rear half bent downwards. This eliminates the need for post-bending processing steps of the workpiece 41, thereby improving the processing efficiency of bent workpieces and reducing processing costs.

[0104] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the invention and should not be construed as limiting the scope of protection of the invention in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of the invention without inventive effort, and these embodiments will all fall within the scope of protection of the present invention.

Claims

1. A continuous forming die for preparing bent workpieces, comprising an upper die assembly and a lower die assembly; the upper die assembly comprising an upper die base, an upper pad, an upper clamping plate, an upper stop plate, and an upper stripping plate suspended from top to bottom from an upper die frame; the lower die assembly comprising a lower die template, a lower pad, and a lower die base mounted from top to bottom on a stamping platform, characterized in that, It also includes a bending and rotating mold assembly; Between the upper stripper plate and the lower template, from front to back, there are sequentially arranged punching and folding stations, forming stations, cutting and punching stations, folding and turning stations, turning and punching stations, folding stations, and bending and cutting stations for processing workpieces; the bending and rotating mold assembly is installed at the bending and cutting station and close to the rear end of the upper clamping plate. In the bending and cutting station, a left edge cutting punch and a right edge cutting punch are respectively installed on the left and right sides of the upper clamping plate. The lower ends of the left edge cutting punch and the right edge cutting punch pass downward through the upper stop plate and the upper stripping plate respectively and cut off the rear end portions of the left and right edges of the workpiece. The bending and rotating mold assembly includes a swing block and a rotating shaft; the rotating shaft passes through the swing block from left to right, and the left and right ends of the rotating shaft are rotatably mounted close to the rear end of the upper ejector plate; there is a clearance space below the swing block, and the bottom of the swing block is exposed downwards below the upper ejector plate; the rear end face of the lower template and the front end face of the bottom of the swing block are mutually fitting arc-shaped surfaces, and there is a gap between the rear end face of the lower template and the front end face of the bottom of the swing block; The bending and rotating mold assembly also includes a spring pin and a fixing plate; The top surface of the swing block is provided with a recessed spring nail groove, and the fixing plate is provided with a spring nail through hole; The upper mold base is provided with a spring pin fixing hole. The bottom of the spring pin fixing hole is connected to the top of the spring pin through hole. The top of the spring pin is installed in the spring pin fixing hole, and the lower end of the spring pin passes downward through the spring pin through hole and abuts against the bottom of the spring pin groove. In the punching and bending station, the upper clamping plate is equipped with two sets of first side hole punches; The two sets of first side hole punches are used to drill right side holes and front side holes on the workpiece, respectively. The right side holes and the front side holes are both elongated holes arranged intermittently, and the right side holes and the front side holes are located on the right side and the front side of the workpiece, respectively.

2. The continuous forming die for preparing bent workpieces according to claim 1, characterized in that, The bending and rotating module assembly also includes a rear baffle and two side baffles; The top of the fixed plate is elastically suspended from the bottom surface of the upper mold base. The top of the rear baffle and the top of the two side baffles are respectively fixed to the bottom surface of the fixed plate. The fixed plate is located above the swing block, and the rear baffle is located behind the swing block. The left and right ends of the rotating shaft are rotatably mounted on the two opposite surfaces of the two side baffles. A spring is fitted onto the outer side of the spring nail, and the top and bottom ends of the spring abut against the top of the spring nail fixing hole and the top surface of the fixing plate, respectively.

3. The continuous forming die for preparing bent workpieces according to claim 1, characterized in that, In the punching and folding station, the upper clamping plate is also equipped with a pair of first folding punches, a pair of positioning hole punches, and a first left side hole punch. A pair of the first folding punches are used to press down the left and right edges of the workpiece to form a left guide edge and a right guide edge; A pair of positioning hole punches are used to punch the workpiece and open two positioning holes, the two positioning holes being located at the middle of the workpiece with the left and right holes spaced apart; the first left hole punch is used to punch the workpiece and open a first left hole, the first left hole being located between the positioning hole and the left guide edge; The upper pad is hardened, and the top of the left edge cutting punch, the top of the right edge cutting punch, the top of the first side hole punch, the top of the first folding punch, the top of the positioning hole punch and the top of the first left side hole punch respectively abut against the bottom surface of the upper pad. The upper stop plate and the upper release plate are respectively provided with multiple through holes, and the multiple through holes correspond one-to-one with the left edge cutting punch, the right edge cutting punch, the first side hole punch, the first folding punch, the positioning hole punch and the first left side hole punch; When the mold is opened and closed, the left edge cutting punch, the right edge cutting punch, the first side hole punch, the first folding punch, the positioning hole punch, and the first left side hole punch move up and down in the corresponding through holes.

4. The continuous forming die for preparing bent workpieces according to claim 3, characterized in that, At the forming station, the upper clamping plate is equipped with a center hole punch; the bottom surface of the upper stripper plate is provided with an upwardly recessed front plate forming groove, a rear plate forming groove, and a center hole forming groove. The center hole punch is used to punch the front half of the workpiece to form a ring-shaped center cut. The front plate forming groove and the rear plate forming groove are used to press the front half and the rear half of the workpiece, respectively, to form an upwardly protruding front upper convex surface and a rear upper convex surface with annular reinforcing ribs; the center hole forming groove is used to press the part inside the center cut of the workpiece to form a forming plane; the annular reinforcing ribs on the front upper convex surface surround the two positioning holes spaced apart on the left and right, and the forming plane is located between the two positioning holes.

5. The continuous forming die for preparing bent workpieces according to claim 4, characterized in that, At the cutting and punching station, the upper clamping plate is equipped with a first irregular hole punch, a second irregular hole punch, and a second left side hole punch; The bottom surface of the upper stripper plate is provided with an upwardly recessed first stripper groove and a second stripper groove, the first stripper groove and the second stripper groove being matched with the shape and size of the front upper convex surface and the rear upper convex surface, respectively. The first and second irregular hole punches are used to punch around the two positioning holes spaced apart on the left and right sides of the workpiece to create a first irregular hole and an annular second irregular hole cut. The left side of the first irregular hole is connected to the center cut, and the front and rear sides of the first irregular hole are close together. The left side of the second irregular hole cut is connected to the first left hole. The second left hole punch is used to punch the position between the first left hole and the left guide edge of the workpiece to form a second left hole.

6. The continuous forming die for preparing bent workpieces according to claim 5, characterized in that, At the folding and turning station, the upper clamping plate is equipped with a first left-side cutting punch, and the bottom surface of the upper release plate is provided with an upwardly recessed first irregular hole edge groove, a second irregular hole turning groove, and a second irregular hole pressing groove. The first left-side cutting punch is used to punch the portion between the left guide edge and the rear upper convex surface of the workpiece to create a strip-shaped first left-side through hole; The lower template is provided with three upper protruding inserts that match the shape and size of the first irregular hole edge groove, the second irregular hole flipping groove, and the second irregular hole pressing groove. Two of the upper protruding inserts cooperate with the first irregular hole edge groove and press the edges of the converging parts of the front and rear sides of the first irregular hole to form a pair of right-folded edges that fold upwards. The remaining upper protruding insert cooperates with the second irregular hole flipping groove and the second irregular hole pressing groove and presses the right side part inside the cut of the second irregular hole to form a left-folded edge that folds upwards at an angle.

7. The continuous forming die for preparing bent workpieces according to claim 6, characterized in that, At the flanging and punching station, the upper clamping plate is equipped with a second left-side cutting punch, and the bottom surface of the upper stripper plate is provided with an upwardly recessed second irregular hole flanging groove. The lower template is provided with a first groove that cooperates with the second left side cutting punch and a fourth upper protruding insert that cooperates with the second irregular hole flange groove; The second left-side cutting punch is used to press the left side of the workpiece downward to form a second left-side through hole, and the rear end of the second left-side through hole is connected to the front end of the first left-side through hole; The second irregular hole flange groove is used to cooperate with the upper protruding insert to press the edge of the second irregular hole cut and fold it upward to form a left flange hole.

8. The continuous forming die for preparing bent workpieces according to claim 7, characterized in that, At the folding station, the upper clamping plate is equipped with a front punch, and the bottom surface of the upper stripper plate is provided with an upwardly recessed front folding groove. The lower template is provided with a second groove that matches the front punch and a fifth upper protruding insert that matches the front folded edge groove; The front punch is used to punch downwards on both sides of the front hole to form a second front hole; the front folded groove cooperates with the corresponding upper protruding insert and folds upwards on both sides of the second front hole to form a front folded hole.

9. The continuous forming die for preparing bent workpieces according to claim 8, characterized in that, At the bending and cutting station, the upper clamping plate is also equipped with a third left-side cutting punch and a right-side cutting punch; The upper ejector plate is provided with a downwardly protruding flange insert, and the lower template is provided with a clearance hole. The clearance hole corresponds to and matches the flange insert, and the clearance hole and the flange insert are respectively located below and above the first irregular hole. The left edge cutting punch and the right edge cutting punch are used to punch and cut off the left guide edge and the right guide edge, respectively, to form a left cut and a right cut; the third left edge cutting punch is used to punch and cut off the front and rear ends of the left side of the left folded edge to form a third left through hole; the right edge cutting punch is used to punch and cut off the right side of the front upper convex surface to form a right through hole. The flanged insert is inserted downward into the first irregular hole, causing the four edges of the first irregular hole to fold downward, and causing the pair of right flanges that originally protruded upward to follow the four edges and flip downward to become a pair of right flanges facing each other.

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