Plate positioning device for high and low die cavities

Abstract

The utility model provides a plate positioning device for high and low die cavities. The plate positioning device comprises a flange assembly, a pressing plate assembly and a supporting plate assembly. The flange assembly is limited at each edge of the high and low die cavities to prevent the horizontal deviation of the plate; the pressing plate assembly comprises a pressing plate, a pressing plate connecting base and a pressing plate driving mechanism, the pressing plate driving mechanism is connected with the pressing plate and can drive the pressing plate to rotate, and the pressing face of the pressing plate can be pressed on the upper surface of the edge of the plate covering the high-position molded surface area; the supporting plate assembly comprises a supporting plate, a supporting plate connecting base and a balancing weight, the supporting plate is rotatably connected to the supporting plate connecting base, the end, away from the plate, of the supporting plate is connected with the balancing weight, and the end, close to the plate, of the supporting plate is provided with a protruding supporting part; under the driving of the gravity torque of the balancing weight, the supporting part extends out of the front face of the supporting plate connecting base and supports the suspended part of the plate covering the low-position molded surface area. According to the utility model, the efficient avoidance and accurate positioning in the stamping process can be realized while the stable support of a plate in a low-position area is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of sheet metal forming and processing technology, specifically relating to a sheet metal positioning device for high and low mold cavities. Background Technology

[0002] In the stamping of complex curved surface parts such as automotive body panels and aerospace sheet metal parts, mold structures with cavities of varying heights are often used. These mold cavities have significant height differences (e.g., a higher front surface and a lower rear surface), leading to two core problems when the sheet metal covers the mold cavity:

[0003] 1. Risk of suspension and collapse: The sheet material in the low cavity area is suspended due to lack of support. It is prone to collapse and deformation during gravity or pre-compression, which affects the forming accuracy.

[0004] 2. Insufficient positioning stability: The sheet metal is prone to horizontal displacement at the junction of the high and low mold cavities due to inertia or the force of the stamping fluid; traditional rigid material support mechanisms require an additional drive system to avoid the upper mold, which is complex in structure and has a delayed response. Utility Model Content

[0005] The purpose of this invention is to provide a sheet metal positioning device for high and low die cavities, which can achieve efficient avoidance and precise positioning during the stamping process while ensuring stable support of the sheet metal in the low position area.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A sheet metal positioning device for high and low mold cavities includes a die assembly, a side guard assembly, a pressure plate assembly, and a support plate assembly. The die assembly includes a die and a die base, the die being fixedly mounted on the die base. The die has high and low mold cavities, with a high-position surface at the front and a low-position surface at the rear. The side guard assembly has at least one side guarded at each of the three edges of the high-position surface and at least one side guarded at each of the three edges of the low-position surface. The side guard assembly is used to abut against the edges of the sheet metal to prevent horizontal movement of the sheet metal. The pressure plate assembly includes a pressure plate, a pressure plate connecting seat, and a pressure plate driving mechanism. The pressure plate connecting seat is fixed to the die base and close to the front edge of the high-position surface. The pressure plate is rotatably connected to the pressure plate connecting seat. The pressure plate driving mechanism... The assembly is mounted on the die holder. The pressure plate drive mechanism is connected to the pressure plate and can drive the pressure plate to rotate. The pressing surface of the pressure plate can press against the upper edge surface of the sheet metal covering the high profile area. The pallet assembly includes a pallet, a pallet connecting seat, and a counterweight. The pallet connecting seat is vertically fixed on the die holder and close to the rear end edge of the low profile. The pallet is rotatably connected to the pallet connecting seat. The end of the pallet away from the sheet metal is connected to the counterweight. The end of the pallet close to the sheet metal is provided with a protruding support portion. Driven by the gravitational torque of the counterweight, the support portion extends from the front of the pallet connecting seat and supports the suspended portion of the sheet metal covering the low profile area. When the upper die presses down on the sheet metal, the support portion rotates downward to a clearance position.

[0008] As a preferred embodiment of this utility model, the front side of the pallet connecting seat forms a positioning reference surface that abuts against the edge of the plate, and the upper end of the positioning reference surface is connected to a guide slope or a guide arc surface.

[0009] As a preferred embodiment of this utility model, the front of the tray connecting seat is provided with a limiting hole arranged in the vertical direction, the support part extends out from the limiting hole, and when the support part is rotated to the horizontally extended state, it abuts against the top hole wall of the limiting hole.

[0010] As a preferred embodiment of this utility model, the edge-blocking assembly includes an edge-blocking plate and a guide base. The die base is provided with a guide groove that slides with the guide base. The guide base is provided with a strip-shaped hole, and a bolt passes through the strip-shaped hole to lock the guide base onto the die base. The edge-blocking plate is arranged vertically, and the lower end of the edge-blocking plate is fixedly connected to the guide base. The surface of the edge-blocking plate near the die base forms a positioning reference surface that abuts against the edge of the sheet metal. The upper end of the positioning reference surface is connected to a guide slope or a guide arc surface.

[0011] As a preferred embodiment of this utility model, the edge-blocking assembly located on one side of the front edge of the high-position surface further includes a lever plate and a sensor. The lever plate is rotatably connected to the side adjacent to the positioning reference surface of the edge-blocking plate via a rotating shaft. The working surface of the lever plate protrudes from the positioning reference surface of the edge-blocking plate in a free state. A guide slope or guide arc surface is connected to the upper end of the working surface of the lever plate. When the sheet is placed, the lever plate is pressed to rotate toward the side away from the sheet. The sensor is installed on the edge-blocking plate and located on the side of the lever plate away from the sheet. The sensor is used to detect the rotational displacement of the lever plate.

[0012] As a preferred embodiment of this utility model, a limiting block is fixedly provided at the lower end of the dial plate, and a limiting groove is provided on the die seat. The limiting block is embedded in the limiting groove and has a clearance fit with the side wall of the limiting groove. When the dial plate is pressed and rotated by the sheet material, the limiting block slides in the limiting groove to limit the maximum rotation angle of the dial plate.

[0013] As a preferred embodiment of this utility model, the pressure plate driving mechanism includes a cylinder, a push rod, and a connecting rod. The telescopic end of the cylinder is fixedly connected to one end of the push rod, the other end of the push rod is rotatably connected to one end of the connecting rod, and the other end of the connecting rod is rotatably connected to the end of the pressure plate away from its pressing surface.

[0014] As a preferred embodiment of this utility model, the outer side of the die holder is provided with a mounting cavity for mounting the pressure plate drive mechanism. The mounting cavity is located below the mounting position of the pressure plate. The cylinder is arranged vertically and fixed in the mounting cavity. The telescopic end of the cylinder faces upward. The top of the mounting cavity is provided with a clearance hole that provides movement space for the connecting rod.

[0015] As a preferred embodiment of this utility model, both the pressure plate assembly and the tray assembly are provided in twos.

[0016] The sheet metal positioning device for high and low mold cavities provided by this utility model has the following advantages compared with the prior art:

[0017] This utility model embodiment organically combines a side-stop assembly, a pressing assembly, and a support plate assembly. The side-stop assembly limits the edges of the high and low mold cavities to prevent the sheet metal from shifting horizontally. The pressing assembly precisely presses the edge of the sheet metal in the high area to prevent it from warping or shifting. The support plate assembly automatically supports the low-positioned suspended sheet metal by the gravity of the counterweight block to prevent it from collapsing. When the upper mold presses down, the support plate automatically rotates down to avoid it, without the need for additional drive. The overall coordination of all components achieves stable positioning of the sheet metal on complex surfaces and improves stamping accuracy. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0019] Figure 1 This is a perspective view of the sheet metal positioning device for high and low mold cavities provided in this embodiment of the utility model;

[0020] Figure 2 This is a perspective view of another view of the sheet metal positioning device for high and low mold cavities provided in this embodiment of the utility model;

[0021] Figure 3 It is at Figure 2 A magnified view of region A in the structure shown;

[0022] Figure 4 It is at Figure 2 A magnified view of region B in the structure shown;

[0023] Figure 5 It is at Figure 2 A magnified view of region C in the structure shown;

[0024] Figure 6 This is a partial sectional view of the sheet metal positioning device, showing the arrangement of the pressure plate drive mechanism.

[0025] Marked in the image:

[0026] Die assembly 10; die 11; high profile 111; low profile 112; die base 12; guide groove 121; limiting groove 122; mounting cavity 123; clearance hole 124; lower die base 13;

[0027] Side guard assembly 20; side guard plate 21; positioning reference surface 211; guide arc surface 212; guide base 22; strip hole 23; lever plate 24; guide inclined surface 241; limit block 242; sensor 25;

[0028] Pressure plate assembly 30; pressure plate 31; pressure plate connecting seat 32; pressure plate drive mechanism 33; cylinder 331; push rod 332; connecting rod 333;

[0029] Pallet assembly 40; Pallet 41; Pallet connecting seat 42; Positioning reference surface 421; Guide slope 422; Counterweight block 43; Support part 44; Limiting hole 45. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0031] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model.

[0032] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0033] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0034] Please refer to the following: Figures 1 to 6 The sheet metal positioning device for high and low mold cavities provided in the embodiments of this utility model will now be described.

[0035] like Figures 1 to 6 As shown, the sheet metal positioning device for high and low mold cavities in this embodiment of the present invention includes a die assembly 10, a side guard assembly 20, a pressure plate assembly 30, and a support plate assembly 40.

[0036] The die assembly 10 includes a die 11, a die base 12, and a lower die base 13. The die 11 is embedded in the die base 12, and the die base 12 is fixed to the lower die base 13. The die 11 has high and low cavities, with the front side of the high and low cavities being a high-position profile 111 and the rear side being a low-position profile 112. The die 11 directly contacts the sheet metal and performs the forming function. The die base 12 serves as a dedicated clamp for the die 11, used to fix and support it. The lower die base 13 serves as the bottom support platform of the die frame, used to fix the die base 12 and surrounding components.

[0037] The edge-stopping assembly 20 is provided with at least one on each of the three edges of the high-position profile 111 and at least one on each of the three edges of the low-position profile 112. The edge-stopping assembly 20 is used to abut against the edge of the sheet metal to prevent horizontal displacement of the sheet metal during placement or stamping, and to ensure accurate coverage of the high and low mold cavities.

[0038] The pressure plate assembly 30 includes a pressure plate 31, a pressure plate connecting seat 32, and a pressure plate driving mechanism 33. The pressure plate connecting seat 32 is fixed on the die base 12 and close to the front edge of the high-position profile 111. The pressure plate 31 is rotatably connected to the pressure plate connecting seat 32 via a rotating shaft. The pressure plate driving mechanism 33 is mounted on the die base 12. The pressure plate driving mechanism 33 is connected to the pressure plate 31 and can drive the pressure plate 31 to rotate. The pressing surface of the pressure plate 31 can press against the upper edge of the sheet material covering the area of ​​the high-position profile 111 to prevent warping or stamping displacement.

[0039] The pallet assembly 40 includes a pallet 41, a pallet connecting seat 42, and a counterweight 43. The pallet connecting seat 42 is vertically fixed to the die base 12 and close to the rear end edge of the lower profile 112. The pallet 41 is rotatably connected to the pallet connecting seat 42. The end of the pallet 41 away from the sheet material is connected to the counterweight 43. The end of the pallet 41 close to the sheet material has a protruding support portion 44. Driven by the gravitational torque of the counterweight 43, the support portion 44 extends from the front of the pallet connecting seat 42 and supports the suspended portion of the sheet material covering the area of ​​the lower profile 112. When the upper die presses down the sheet material, the support portion 44 rotates downward to the clearance position. After the upper die rises, the gravity of the counterweight 43 drives the pallet 41 to rotate back to the support position.

[0040] Therefore, the sheet metal positioning device for high and low mold cavities according to the present invention achieves stable positioning of the sheet metal through the organic combination of the edge retaining assembly 20, the pressing assembly, and the support plate assembly 40. The edge retaining assembly 20 limits the sheet metal at each edge of the high and low mold cavities to prevent horizontal displacement. The pressing assembly precisely presses the edge of the sheet metal in the high position area to prevent warping or displacement. The support plate assembly 40 automatically supports the low suspended sheet metal by gravity through the counterweight block 43 to avoid collapse. When the upper mold presses down, the support plate 41 automatically rotates down to avoid it without additional drive. The overall coordination of each component achieves stable positioning of the sheet metal on complex surfaces and improves stamping accuracy.

[0041] For example, such as Figure 4 As shown, the front side (i.e. the side in contact with the sheet material) of the pallet connecting seat 42 forms a positioning reference surface 421 that abuts against the edge of the sheet material. It can be used in place of the edge guard assembly 20 located on the rear edge side of the low profile 112 to restrict the sheet material from moving backward. The upper end of the positioning reference surface 421 is connected to a guide slope 422 or a guide arc surface to guide the sheet material to be smoothly placed into the positioning reference surface and reduce placement resistance.

[0042] For example, such as Figure 4As shown, the front of the pallet connecting seat 42 is provided with a limiting hole 45 arranged in the vertical direction. The support part 44 extends out from the limiting hole 45. When the support part 44 is rotated to the horizontally extended state, it abuts against the top hole wall of the limiting hole 45, thereby fixing the horizontal position of the pallet 41 and enhancing the reliability of the support.

[0043] For example, such as Figure 4 As shown, the edge-blocking assembly 20 includes an edge-blocking plate 21 and a guide base 22. The die base 12 is provided with a guide groove 121 that slides with the guide base 22. The guide base 22 is provided with a strip hole 23. Bolts pass through the strip hole 23 to lock the guide base 22 onto the die base 12. The edge-blocking plate 21 is arranged vertically. The lower end of the edge-blocking plate 21 is fixedly connected to the guide base 22. The surface of the edge-blocking plate 21 near the sheet metal forms a positioning reference surface 211 that abuts against the edge of the sheet metal. The upper end of the positioning reference surface 211 is connected to a guide slope or guide arc surface 212. Therefore, the vertical plane of the baffle plate 21 serves as the positioning reference plane, clamping the edge of the sheet metal from three directions (three sides of the high profile 111 + three sides of the low profile 112) to form a closed limit, preventing the sheet metal from shifting laterally due to stamping inertia or material rheology, and ensuring the accuracy of the forming contour; at the same time, by loosening and locking the bolts on the strip hole 23, the horizontal position of the baffle plate 21 can be adjusted, thereby realizing the adjustment of the positioning reference plane position to adapt to sheet metal of different sizes.

[0044] For example, such as Figure 3 As shown, the edge-blocking assembly 20 located on one side of the front edge of the high-position surface 111 also includes a lever 24 and a sensor 25. The lever 24 is rotatably connected to the side adjacent to the positioning reference surface 211 of the edge-blocking plate 21 via a rotating shaft. The working surface of the lever 24 protrudes from the positioning reference surface 211 of the edge-blocking plate 21 in a free state. A guide slope 241 or a guide arc surface is connected to the upper end of the working surface of the lever 24. When the sheet is placed, the lever 24 is pressed to rotate away from the sheet. The sensor 25 is installed on the edge-blocking plate 21 and located on the side of the lever 24 away from the sheet. The sensor 25 is used to detect the rotational displacement of the lever 24. Thus, the edge of the sheet presses against the working surface of the lever 24, and the lever 24 rotates around the axis away from the sheet, approaching the sensor 25. The sensor 25 (such as an inductive proximity switch) outputs a high-level signal, sending a "sheet in place" signal.

[0045] For example, such as Figure 3As shown, a limiting block 242 is fixedly provided at the lower end of the dial plate 24, and a limiting groove 122 is provided on the die holder 12. The limiting block 242 is embedded in the limiting groove 122 and has a clearance fit with the side wall of the limiting groove 122. When the dial plate 24 is pressed and rotated by the sheet material, the limiting block 242 slides in the limiting groove 122, limiting the maximum rotation angle of the dial plate 24. Thus, when the dial plate 24 rotates to the maximum rotation angle, the limiting block 242 rigidly abuts against the end face of the limiting groove 122, the dial plate 24 stops rotating, and the sensor 25 is protected from damage by excessive pressure.

[0046] For example, such as Figure 6 As shown, the pressure plate driving mechanism 33 includes a cylinder 331, a push rod 332, and a connecting rod 333. The telescopic end of the cylinder 331 is fixedly connected to one end of the push rod 332, and the other end of the push rod 332 is rotatably connected to one end of the connecting rod 333. The other end of the connecting rod 333 is rotatably connected to the end of the pressure plate 31 away from its pressing surface. During operation, the telescopic end of the cylinder 331 pushes the push rod 332 upward, which drives the connecting rod 333 to rotate. The connecting rod 333 pushes the pressure plate 31 to rotate downward around its axis of rotation, pressing it against the upper edge surface of the sheet metal covering the high-position profile 111 area to prevent warping or stamping displacement.

[0047] For example, such as Figure 6 As shown, the outer side of the die holder 12 is provided with a mounting cavity 123 for mounting the pressure plate drive mechanism 33. The mounting cavity 123 is located below the mounting position of the pressure plate 31. The cylinder 331 is vertically arranged and fixed in the mounting cavity 123, with the telescopic end of the cylinder 331 facing upward. The top of the mounting cavity 123 is provided with a clearance hole 124 to provide movement space for the connecting rod 333. Thus, the pressure plate drive mechanism 33 is hidden inside the die holder 12, saving arrangement space and resulting in a compact structure.

[0048] For example, such as Figure 1 and Figure 2 As shown, both the pressure plate assembly 30 and the support plate assembly 40 are provided in twos to apply pressure and provide symmetrical support, thereby improving the dynamic stability under high-speed stamping.

[0049] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A sheet metal positioning device for high and low mold cavities, characterized in that, include: A die assembly includes a die and a die base, wherein the die is fixedly embedded in the die base, and the die has high and low cavities, wherein the front side of the high and low cavities is a high profile and the rear side is a low profile. An edge-stopping assembly, wherein at least one edge-stopping assembly is provided on each of the three edges of the high-position profile and at least one edge-stopping assembly is provided on each of the three edges of the low-position profile, the edge-stopping assembly being used to abut against the edge of the sheet material; A pressure plate assembly includes a pressure plate, a pressure plate connecting seat, and a pressure plate driving mechanism. The pressure plate connecting seat is fixed on the die base and close to the front edge of the high-position profile. The pressure plate is rotatably connected to the pressure plate connecting seat. The pressure plate driving mechanism is mounted on the die base and is connected to the pressure plate and can drive the pressure plate to rotate. The pressing surface of the pressure plate can press against the upper edge surface of the sheet material covering the high-position profile area. A pallet assembly includes a pallet, a pallet connecting seat, and a counterweight. The pallet connecting seat is vertically fixed to the die base and close to the rear end edge of the lower profile. The pallet is rotatably connected to the pallet connecting seat. The end of the pallet away from the sheet material is connected to the counterweight, and the end of the pallet close to the sheet material has a protruding support portion. Driven by the gravitational torque of the counterweight, the support portion extends from the front of the pallet connecting seat and supports the suspended portion of the sheet material covering the lower profile area. When the upper die presses down on the sheet material, the support portion rotates downward to a clearance position.

2. The sheet metal positioning device for high and low mold cavities as described in claim 1, characterized in that, The front of the pallet connecting seat forms a positioning reference surface that abuts against the edge of the plate, and the upper end of the positioning reference surface is connected to a guide slope or a guide arc surface.

3. The sheet metal positioning device for high and low mold cavities as described in claim 2, characterized in that, The front of the tray connecting seat is provided with a limiting hole arranged in the vertical direction. The support part extends out from the limiting hole. When the support part is rotated to the horizontally extended state, it abuts against the top wall of the limiting hole.

4. The sheet metal positioning device for high and low mold cavities as described in claim 1, characterized in that, The edge-blocking assembly includes an edge-blocking plate and a guide base. The die base has a guide groove that slides with the guide base. The guide base has a strip hole, and a bolt passes through the strip hole to lock the guide base onto the die base. The edge-blocking plate is arranged vertically, and its lower end is fixedly connected to the guide base. The surface of the edge-blocking plate near the sheet metal forms a positioning reference surface that abuts against the edge of the sheet metal. The upper end of the positioning reference surface is connected to a guide slope or a guide arc surface.

5. The sheet metal positioning device for high and low mold cavities as described in claim 4, characterized in that, The edge-blocking assembly located on one side of the front edge of the high-position profile also includes a lever and a sensor. The lever is rotatably connected to the side adjacent to the positioning reference surface of the edge-blocking plate via a rotating shaft. The working surface of the lever protrudes from the positioning reference surface of the edge-blocking plate in a free state. A guide slope or guide arc surface is connected to the upper end of the working surface of the lever. When the sheet is placed, the lever is pressed to rotate toward the side away from the sheet. The sensor is installed on the edge-blocking plate and located on the side of the lever away from the sheet. The sensor is used to detect the rotational displacement of the lever.

6. The sheet metal positioning device for high and low mold cavities as described in claim 5, characterized in that, A limiting block is fixed at the lower end of the dial plate, and a limiting groove is formed on the die seat. The limiting block is embedded in the limiting groove and has a clearance fit with the side wall of the limiting groove. When the dial plate is pressed and rotated by the sheet material, the limiting block slides in the limiting groove to limit the maximum rotation angle of the dial plate.

7. The sheet metal positioning device for high and low mold cavities as described in claim 1, characterized in that, The pressure plate driving mechanism includes a cylinder, a push rod, and a connecting rod. The telescopic end of the cylinder is fixedly connected to one end of the push rod, the other end of the push rod is rotatably connected to one end of the connecting rod, and the other end of the connecting rod is rotatably connected to the end of the pressure plate away from its pressing surface.

8. The sheet metal positioning device for high and low mold cavities as described in claim 7, characterized in that, The outer side of the die holder is provided with a mounting cavity for mounting the pressure plate drive mechanism. The mounting cavity is located below the mounting position of the pressure plate. The cylinder is arranged vertically and fixed in the mounting cavity. The telescopic end of the cylinder faces upward. The top of the mounting cavity is provided with a clearance hole that provides movement space for the connecting rod.

9. The sheet metal positioning device for high and low mold cavities as described in claim 1, characterized in that, Both the pressure plate assembly and the tray assembly are provided in two.

Images