Machining die for aluminum plate of automobile body

Abstract

The invention discloses a machining die for an automobile body aluminum plate, and relates to the technical field of automobile body aluminum plates, the machining die comprises an upper die body and a lower die body which are matched with each other in the vertical direction, and the upper die body is arranged above the lower die body; a rack plate is fixed to the right side of the upper die body. A fixing mechanism is arranged at the top of the right side of the lower die body and comprises two fixing round blocks and two fixing sleeves. The opposite faces of the two fixed round blocks are each coaxially and rotationally connected with a rotating round block, and a gear rod is coaxially fixed between the two rotating round blocks. The fixing sleeve is horizontally arranged, the whole fixing sleeve is in a rectangular plate shape, and one end of the fixing sleeve is fixedly connected with the rotating round block; each fixing sleeve is provided with a sliding groove and a positioning pin hole, and a moving plate, a positioning block, an air cylinder and a pressing plate are arranged between the two fixing sleeves; the technical effects that when an aluminum plate is stamped, one end of the edge of the aluminum plate is limited and lifted to be suspended, and therefore the wrinkling phenomenon is reduced, and full forming is achieved are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile body aluminum plates, and in particular to a processing die for automobile body aluminum plates. Background Art

[0002] The production of automobile body aluminum plates requires the use of automobile body aluminum plate processing molds, and general automobile body aluminum plate processing molds are stamping molds. When using automobile body aluminum plate processing molds, the molds are installed on the stamping machine through a large number of bolts, which is inconvenient for users to install the upper mold, and the workpiece on the top cannot be fixed. As a result, the user needs a lot of time to remove the bolts one by one before removing the upper mold, which increases the labor intensity of the user. The workpiece is also prone to move left and right during stamping, thereby affecting the accuracy of the workpiece.

[0003] A Chinese patent with authorization announcement number CN113926924B in the prior art discloses a processing mold for automobile body aluminum plates, including a lower mold body, the top of which is movably connected to an upper mold body, a lower mold matching hole is provided at the bottom of the inner wall of the lower mold body, the bottom of the upper mold body is fixedly connected to an upper mold stamping plate, the bottom of the upper mold stamping plate is fixedly connected to an upper mold matching plate, clamping mechanisms are provided at the tops of both sides of the lower mold body, both sides of the upper mold body are movably connected to fixed plates, and the top of the fixed plates is fixedly connected to a connecting plate.

[0004] The above device can fix the workpiece by setting a clamping mechanism to prevent the workpiece from shaking. However, since the aluminum plate is usually left with a certain edge around the aluminum plate during the stamping process, this part is called "material edge" or "waste". The function of the material edge is to ensure the uniformity of material flow during the stamping process and to facilitate the cutting of the parts from the material strip after forming. When the middle of the aluminum plate is stamped, if the aluminum plate is not fixed, the unstamped part will bend upward due to the characteristics of material flow. This phenomenon is called "wrinkling" and is one of the problems that need to be avoided in the stamping process. Wrinkling not only affects the appearance of the body parts, but may also affect its function and the subsequent process. However, if both ends of the aluminum plate are fixed, it is not suitable for stamping complex shapes, because the material flow is more restricted and may cause some areas of the part to be overstretched or insufficiently formed. Therefore, in order to reduce the risk of "wrinkling" or poor forming effect of the body aluminum plate, it is necessary to improve the above device and enable the fixing mechanism to be intelligently changed according to the shape of the mold, so as to automatically adapt to production needs. Summary of the invention

[0005] The embodiment of the present application solves the technical problem that the aluminum plates of the prior art are prone to wrinkling or inadequate forming when being stamped by providing a processing mold for automobile body aluminum plates. It achieves the technical effect that when the aluminum plate is stamped, one end of its edge is limited and lifted up to form a suspension, thereby reducing wrinkling and achieving sufficient forming.

[0006] The embodiment of the present application provides a processing die for an automobile body aluminum plate, comprising an upper die body and a lower die body that cooperate with each other in the vertical direction, wherein the upper die body is arranged above the lower die body; two rack plates are fixed on the right side of the upper die body, and a plurality of teeth are evenly distributed on the side of the rack plate away from the upper die body in the vertical direction;

[0007] A fixing mechanism is provided at the top of the right side of the lower mold body, and the fixing mechanism includes two fixed round blocks and two fixed sleeves, the two fixed round blocks and the fixed sleeves are symmetrically arranged in the front-rear direction of the lower mold body, and the edges of the fixed round blocks are fixedly connected to the lower mold body; the opposite surfaces of the two fixed round blocks are coaxially rotatably connected with a rotating round block, a gear rod is coaxially fixed between the two rotating round blocks, and gears are coaxially fixed at both ends of the gear rod in the length direction; the fixing sleeve is horizontally arranged, and the fixing sleeve is in the shape of a rectangular plate as a whole, and one end of the fixing sleeve is fixedly connected to the rotating round block; a sliding groove and a positioning pin hole are provided on the fixing sleeve, and a movable plate, a positioning block, a cylinder and a pressing plate are provided between the two fixing sleeves, and the pressing plate and the positioning block are respectively located on the upper and lower end surfaces of the aluminum plate, and are used to fix one end of the aluminum plate;

[0008] The gear is matched with the teeth on the rack plate. When the upper die body is punching downward, the rack plate moves downward synchronously and meshes with the gear rod, so that the rack plate drives the gear rod to rotate, the gear rod drives the rotating round block to rotate, and the rotating round block drives the fixed sleeve to rotate counterclockwise.

[0009] Preferably, a sliding groove is provided on the fixed sleeve along the length direction, and a plurality of positioning pin holes are provided in the sliding groove along the length direction thereof, a movable plate is slidably connected between two of the sliding grooves, the length direction of the movable plate is perpendicular to the fixed sleeve, a positioning block is fixed to the upper end of the movable plate, a cylinder is fixed to each of the two ends of the positioning block on the lower end surface of the movable plate, an output rod is connected to the top of the cylinder, the output rod vertically passes through the upper end surface of the movable plate, and a pressing plate is commonly fixed to the top ends of the two output rods, the pressing plate and the positioning block are arranged correspondingly; a positioning pin is connected to the end of the movable plate, and the positioning pin passes through the positioning pin hole and is plugged into the end of the movable plate;

[0010] A limiting groove is provided on one side of the fixed round block close to the rotating round block, and the end of the rotating round block is rotatably inserted into the limiting groove. A stopper is fixed on the inner wall of the limiting groove. There are two stoppers, one of which is located at one end of the limiting groove close to the fixed sleeve in the horizontal direction, and the other is located at the top of the limiting groove in the vertical direction; a protrusion is fixed on the side of the rotating round block located in the limiting groove, and the protrusion is located between the two stoppers.

[0011] Preferably, a reset rope is fixed to the lower part of the fixing sleeve away from one end of the lower mold body, and the end of the reset rope away from the fixing sleeve is fixed to the lower end of the side wall of the lower mold body. The reset rope is made of elastic rubber material. The reset rope is used to drive the fixing sleeve to reset to a horizontal state when the fixing sleeve is not subjected to external force.

[0012] Preferably, the movable plate and the positioning block are evenly divided into multiple sections in the length direction, and the multiple sections of the movable plates are connected in series by elastic tubes, the elastic tubes are made of elastic rubber material, the elastic tubes are hollow inside and filled with electrorheological fluid, a transverse plate is arranged on the side of the movable plate away from the lower mold body, the transverse plate is parallel to the movable plate, both ends of the transverse plate are respectively fixed to the ends of the fixed sleeves on both sides away from the lower mold body, a plurality of sliding rods are slidably connected to the transverse plate, the length direction of the sliding rods is perpendicular to the length direction of the transverse plate, the plurality of sliding rods are spaced apart along the length direction of the transverse plate, the plurality of sliding rods correspond one-to-one to the multiple sections of the movable plates, and each sliding rod slides through each movable plate, and the cross-section of the sliding rod is rectangular.

[0013] Preferably, each section of the movable plate is provided with a sliding hole perpendicular to its length direction, the sliding hole is a rectangular through hole, the sliding hole and the sliding rod are slidably matched, a liquid groove is opened below the sliding hole, the opening direction of the liquid groove is in the same direction as the length direction of the movable plate, the liquid groove is matched with the elastic tube, and the elastic tube passes through the liquid groove along the length direction of the movable plate.

[0014] Preferably, a movable contact is respectively fixed on the two end surfaces of the protrusion relative to the two block blocks, and a wire management groove is opened inside the rotating round block on one side of the protrusion, and the two movable contacts are connected to the external power supply through electric wires through the wire management groove respectively; a fixed contact is respectively fixed on the end surface of the two block blocks close to the protrusion side, and the fixed contacts are connected in parallel through power supply lines, and the power supply lines are buried in the fixed round block, and the two power supply lines in the two fixed round blocks respectively pass out of the fixed round block at one end away from the fixed contact, and pass outward into the two ends of the elastic tube; the part between the two power supply lines located in the elastic tube forms a current loop through the electrorheological fluid.

[0015] Preferably, the cross-section of the pressing plate is circular, and the pressing plate as a whole is a cylinder. Cylindrical holes are opened at both ends of the pressing plate, and multi-sided holes are coaxially opened at the inner ends of the cylindrical holes. The top ends of the two output rods are respectively located at the two ends of the length direction of the pressing plate, and a cylinder is fixed to the top end of the output rod close to the pressing plate. The cylinder is inserted into the cylindrical hole in the pressing plate, and the cylinder is rotatably connected to the pressing plate. An electric push rod is fixed to the side of the output rod away from the cylinder, and a multi-sided push column is fixed to the output end of the electric push rod. The multi-sided push column passes through the output rod and coaxially passes through the cylinder, and the multi-sided push column and the multi-sided hole are adapted to each other; the upper mold body is connected to a control system, the control system has a built-in processor, and the electric push rod is signal-connected to the control system.

[0016] Preferably, the lower end of the rotating circular block is fixedly connected to a vertically arranged lower connecting rod, and a receiving plate is fixed to the end of the lower connecting rod away from the rotating circular block, and both ends of the receiving plate in the length direction are respectively connected to the bottom ends of the two lower connecting rods, the receiving plate is located below the gear rod, and the receiving plate is parallel to the length direction of the gear rod, and the cross-section of the receiving plate is rectangular.

[0017] Preferably, a plurality of intelligent push rods are fixed to the upper surface of the receiving plate, the plurality of intelligent push rods correspond one-to-one to a plurality of sliding rods, the output ends of the intelligent push rods face the movable plate, and a segmented stretching plate is fixed to the ends of the output ends of the intelligent push rods.

[0018] Preferably, the segmented stretching plate is vertically arranged, one side of the upper end of the segmented stretching plate is fixedly connected to one end of the sliding rod close to the lower mold body, and the signals of the plurality of intelligent push rods are all connected to the control system.

[0019] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0020] By arranging a gear rod in the fixing mechanism and arranging a corresponding rack plate on the upper die body, when the rack plate moves downward with the upper die body during the stamping process, the rack plate meshes with the gear rod, thereby driving the fixing sleeve to rotate, so that when the middle part of the aluminum plate is stamped, the edge is lifted, and a triangular space is formed under one end of the edge of the aluminum plate, so that the edge of the aluminum plate is fully stretched and moves with the downward pressure of the upper die body. After the end of the aluminum plate is lifted, the suspended triangular area can be used as an outlet for material flow, which helps to reduce the accumulation of material near the fixed end, thereby reducing the risk of wrinkling; it not only avoids the aluminum plate from being The plate is over-stretched, and the position of the aluminum plate is corrected at the same time; and the single-end fixation combined with the rotation and lifting action process reduces the stress concentration near the fixed point, allowing the material to stretch freely at the longer end, thereby reducing the stress at the fixed point; at the same time, single-end fixation can reduce the time for adjusting and replacing molds, improve production efficiency, and solve the technical problems of the prior art that the body aluminum plate is prone to wrinkling or insufficient forming when being stamped, and realizes the ability to limit one end of the edge of the aluminum plate when it is stamped and lift it up to form a suspension, thereby reducing wrinkling and achieving sufficient forming. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0022] Figure 2 It is a top view schematic diagram of a fixing mechanism of Embodiment 1 of the present invention;

[0023] Figure 3 This is a schematic diagram of the internal structure of the fixed round block according to the first embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of a top view of the fixing mechanism of Embodiment 1 of the present invention;

[0025] Figure 5 This is a schematic diagram of the top view of the fixing mechanism of the second embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the internal structure of the fixed round block according to the second embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the front view of the fixing mechanism of the second embodiment of the present invention;

[0028] Figure 8 This is a schematic cross-sectional view of a movable plate according to a second embodiment of the present invention;

[0029] Fig. 9 It is a right side schematic diagram of a moving plate of Embodiment 2 of the present invention;

[0030] Fig.10 This is a schematic diagram of inserting a polygonal column into a polygonal hole in Example 2 of the present invention;

[0031] Fig.11 This is a schematic diagram of a state where a multi-prism exits a multi-prism hole according to a second embodiment of the present invention;

[0032] Fig.12 This is a top view schematic diagram of the fixing mechanism of Embodiment 3 of the present invention;

[0033] Fig.13 It is a front view schematic diagram of the fixing mechanism of the third embodiment of the present invention.

[0034] In the figure:

[0035] Lower die body 100; lower die matching hole 110; upper die matching plate 111; connecting mechanism 120; clamping rod 121; upper die body 200; upper die stamping plate 210; clamping plate 220; connecting plate 300; fixing plate 310; rack plate 320; fixing mechanism 400; fixing round block 410; limiting groove 411; stopper 412; fixed contact 413; rotating round block 420; protrusion 421; movable contact 414; wire management groove 415; gear rod 430; fixing sleeve 440; sliding groove 441; Positioning pin hole 442; reset rope 443; positioning pin shaft 444; moving plate 450; sliding hole 451; liquid channel 452; positioning block 460; cylinder 470; output rod 471; electric push rod 472; multi-faceted push column 473; cylinder 474; pressure plate 480; cylindrical hole 481; multi-faceted hole 482; elastic tube 490; electrorheological fluid 491; cross plate 500; sliding rod 510; power supply line 600; receiving plate 700; intelligent push rod 710; segmented stretching plate 720; lower connecting rod 730. DETAILED DESCRIPTION

[0036] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0037] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0039] Embodiment 1: Figures 1 to 4 As shown, the present application is a processing mold for automobile body aluminum plate, including an upper mold body 200 and a lower mold body 100 that cooperate with each other in the vertical direction, the bottom of the inner wall of the lower mold body 100 is provided with a lower mold matching hole 110, the bottom of the upper mold body 200 is fixedly connected with an upper mold stamping plate 210, and the bottom of the upper mold stamping plate 210 is fixedly connected with an upper mold matching plate 111 that is adapted to the lower mold matching hole 110; both sides of the upper mold body 200 are movably connected with a fixing plate 310, the fixing plate 310 is fixedly connected with the fixing plate 311, and the fixing plate 310 is fixedly connected with the fixing plate 311. The top of the plate 310 is fixedly connected with a connecting plate 300, and connecting mechanisms 120 are provided on both sides of the upper mold body 200. A clamping rod 121 is slidably connected in the connecting mechanism 120. A through hole adapted to the clamping rod 121 is provided on the fixed plate 310, and the clamping rod 121 is used to locate the position of the fixed plate 310 relative to the upper mold body 200; two rack plates 320 are fixed on the right side of the upper mold body 200, and a plurality of teeth are evenly distributed on the side of the rack plate 320 away from the upper mold body 200 in the vertical direction;

[0040] The top of the right side of the lower mold body 100 is provided with a fixing mechanism 400. Figure 1 and Figure 2The fixing mechanism 400 includes two fixed round blocks 410 and two fixed sleeves 440. The two fixed round blocks 410 and the fixed sleeves 440 are symmetrically arranged in the front-to-back direction of the lower mold body 100, and the edges of the fixed round blocks 410 are fixedly connected to the lower mold body 100; the opposite surfaces of the two fixed round blocks 410 are coaxially rotatably connected with a rotating round block 420, and a gear rod 430 is coaxially fixed between the two rotating round blocks 420, and gears are coaxially fixed at both ends of the gear rod 430 in the length direction; the fixed sleeve 440 is horizontally arranged, and the fixed sleeve 440 is a rectangular plate as a whole, and one end of the fixed sleeve 440 is fixedly connected to the rotating round block 420; a sliding groove 441 is opened on the fixed sleeve 440 along the length direction, and a plurality of positioning pin holes 442 are opened in the sliding groove 441 along its length direction. A movable plate 450 is slidably connected between the two sliding grooves 441, and the length direction of the movable plate 450 is perpendicular to the fixed sleeve 440. A positioning block 460 is fixed to the upper end of the movable plate 450, and the lower end surface of the movable plate 450 is located at the positioning block 460. A cylinder 470 is fixed at both ends, and the top of the cylinder 470 is connected to an output rod 471, and the output rod 471 vertically passes through the upper end surface of the movable plate 450, and a pressing plate 480 is commonly fixed to the top of the two output rods 471. The pressing plate 480 is correspondingly arranged with the positioning block 460, and the pressing plate 480 and the positioning block 460 are respectively located on the upper and lower end surfaces of the aluminum plate, and are used to fix one end of the aluminum plate; a positioning pin shaft 444 is connected to the end of the movable plate 450, and the positioning pin shaft 444 passes through the positioning pin hole 442 and is plugged into the end of the movable plate 450;

[0041] The gear is matched with the teeth on the rack plate 320. When the upper mold body 200 is punching downward, the rack plate 320 moves downward synchronously and meshes with the gear rod 430, so that the rack plate 320 drives the gear rod 430 to rotate, the gear rod 430 drives the rotating round block 420 to rotate, and the rotating round block 420 drives the fixed sleeve 440 to rotate counterclockwise.

[0042] A limiting groove 411 is provided on one side of the fixed round block 410 close to the rotating round block 420, and the end of the rotating round block 420 is rotatably inserted into the limiting groove 411, and a stopper 412 is fixed to the inner wall of the limiting groove 411. There are two stoppers 412, one of which is located at one end of the limiting groove 411 close to the fixed sleeve 440 in the horizontal direction, and the other is located at the top of the limiting groove 411 in the vertical direction; a protrusion 421 is fixed to the side edge of the rotating round block 420 located in the limiting groove 411, and the protrusion 421 is located between the two stoppers 412, so that the stopper 412 can limit the rotation angle of the rotating round block 420.

[0043] A reset rope 443 is fixed to the lower part of one end of the fixing sleeve 440 away from the lower mold body 100. The end of the reset rope 443 away from the fixing sleeve 440 is fixed to the lower end of the side wall of the lower mold body 100. The reset rope 443 is made of elastic rubber material. The reset rope 443 is used to drive the fixing sleeve 440 to reset to a horizontal state when the fixing sleeve 440 is not subjected to external force.

[0044] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0045] In this embodiment, a gear rod 430 is arranged in the fixing mechanism 400, and a corresponding rack plate 320 is arranged on the upper die body 200. During the stamping process, when the rack plate 320 moves downward with the upper die body 200, the rack plate 320 meshes with the gear rod 430, thereby driving the fixing sleeve 440 to rotate, so that when the middle part of the aluminum plate is stamped, the edge is lifted, and a triangular space is formed below one end of the edge of the aluminum plate, so that the edge of the aluminum plate is fully stretched and moves with the downward pressure of the upper die body 200. After the end of the aluminum plate is lifted, the suspended triangular area can be used as an outlet for material flow, which helps to reduce the accumulation of materials near the fixed end. Thereby, the risk of wrinkling can be reduced; excessive stretching of the aluminum plate is avoided and the position of the aluminum plate is corrected at the same time; and the single-end fixation combined with the rotation and lifting action process reduces the stress concentration near the fixed point, allowing the material to stretch freely at the longer end, thereby reducing the stress at the fixed point; at the same time, single-end fixation can reduce the time for adjusting and replacing molds, improve production efficiency, and solve the technical problem of the prior art that the body aluminum plate is prone to wrinkling or insufficient forming when being stamped, and achieves the technical effect of limiting one end of the edge of the aluminum plate when being stamped and lifting it to form a suspension, thereby reducing wrinkling and fully forming.

[0046] Embodiment 2: Considering that in the above embodiment 1, when the shape of the stamped part is more complicated, due to the different stamping depths of the aluminum plate on the mold at different parts, the stretching degree of different parts in the length direction of the aluminum plate is also different. In the above embodiment, the fixing mechanism 400 fixes the aluminum plate as a whole in the width direction of one end of the aluminum plate through the positioning block 460 and the pressing plate 480. Although the free end of the aluminum plate can better adapt to the shape change of the mold, it is also necessary to reserve a larger amount of aluminum plate to meet the material flow after stamping. Therefore, the device needs to be improved, such as Figures 5 to 11 As shown, the specific structure is as follows:

[0047] like Figure 5The movable plate 450 and the positioning block 460 are evenly divided into multiple sections in the length direction, and the multiple sections of the movable plate 450 are connected in series through an elastic tube 490. The elastic tube 490 is made of elastic rubber material. The elastic tube 490 is hollow inside and filled with electrorheological fluid 491. A cross plate 500 is arranged on the side of the movable plate 450 away from the lower mold body 100. The cross plate 500 is parallel to the movable plate 450. Both ends of the cross plate 500 are respectively fixed to the ends of the fixed sleeves 440 on both sides away from the lower mold body 100. A plurality of sliding rods 510 are slidably connected to the cross plate 500. The length direction of the sliding rod 510 is perpendicular to the length direction of the cross plate 500. The plurality of sliding rods 510 are spaced apart along the length direction of the cross plate 500. The plurality of sliding rods 510 correspond one-to-one to the multiple sections of the movable plate 450, and each sliding rod 510 slides through each movable plate 450. The cross section of the sliding rod 510 is rectangular.

[0048] like Figure 8 Each section of the movable plate 450 is provided with a sliding hole 451 perpendicular to its length direction. The sliding hole 451 is a rectangular through hole. The sliding hole 451 is slidably matched with the sliding rod 510. A liquid passing groove 452 is opened below the sliding hole 451. The opening direction of the liquid passing groove 452 is in the same direction as the length direction of the movable plate 450. The liquid passing groove 452 is matched with the elastic tube 490. The elastic tube 490 passes through the liquid passing groove 452 along the length direction of the movable plate 450.

[0049] like Fig. 9, a movable contact 414 is fixed on each of the two end surfaces of the protrusion 421 relative to the two stoppers 412, a wire management groove 415 is provided inside the rotating round block 420 on one side of the protrusion 421, and the two movable contacts 414 are connected to the external power supply through the wire management groove 415 through electric wires; a fixed contact 413 is fixed on each of the end surfaces of the two stoppers 412 close to the protrusion 421, and the fixed contacts 413 are connected in parallel through power supply lines 600, and the power supply lines 600 are buried in the fixed round block 410, and the two power supply lines 600 in the two fixed round blocks 410, one end away from the fixed contact 413, respectively passes out of the fixed round block 410, and passes outwardly into the two ends of the elastic tube 490; the part between the two power supply lines 600 located in the elastic tube 490 passes through the electrorheological fluid 4 91 forms a loop; when the fixed sleeve 440 is in a horizontal state and no stamping work is performed, the protrusion 421 fits with the stopper 412 on the right side of the limit groove 411, so that the movable contact 414 is connected to the fixed contact 413, and the power supply line 600 is connected to the power supply, so that current passes through the electrorheological fluid 491, so that the electrorheological fluid 491 hardens, so that the overall position of the movable plate 450 does not change, and a stable fixing effect on the aluminum plate is achieved; when the fixed sleeve 440 is in a rotating state, the movable contact 414 and the fixed contact 413 are separated from each other, the circuit is disconnected, and the electrorheological fluid 491 softens, so that the multi-section movable plate 450 can slide relatively on the sliding rod 510, so as to adapt to the stress changes of different parts of the aluminum plate material when the stamping die of a complex shape is stamped, thereby reducing the reserved amount at both ends of the aluminum plate;

[0050] like Figure 7 , Fig.10 and Fig.11 The cross section of the pressing plate 480 is circular, and the pressing plate 480 is a cylinder as a whole. The pressing plate 480 is provided with cylindrical holes 481 at both ends, and the inner end of the cylindrical hole 481 is coaxially provided with multi-faceted holes 482. The top ends of the two output rods 471 are respectively located at the two ends of the length direction of the pressing plate 480. A cylinder 474 is fixed to the top end of the output rod 471 near the side of the pressing plate 480. The cylinder 474 is inserted into the cylindrical hole 481 in the pressing plate 480. The cylinder 474 is rotatably connected to the pressing plate 480, and the output rod 471 is away from An electric push rod 472 is fixed to one side of the cylinder 474, and a multi-faceted push column 473 is fixed to the output end of the electric push rod 472. The multi-faceted push column 473 passes through the output rod 471 and coaxially passes through the cylinder 474. The multi-faceted push column 473 and the multi-faceted hole 482 are adapted to each other, and the electric push rod 472 can drive the multi-faceted push column 473 to insert or withdraw from the multi-faceted hole 482; the upper mold body 200 is externally connected to a control system, and the control system has a built-in processor, and the electric push rod 472 is connected to the control system signal;

[0051] When the stamping work is not in progress, the electric push rod 472 controls the polygonal push column 473 to be inserted into the polygonal hole 482, so that the pressure plate 480 and the cylinder 474 are relatively fixed, and the pressure plate 480 is in a fixed state; when the stamping work is in progress, when the fixed sleeve 440 rotates upward, the electric push rod 472 is controlled by the electric push rod 472 to drive the polygonal push column 473 to withdraw out of the polygonal hole 482, so that the pressure plate 480 can rotate relative to the cylinder 474, so that the pressure plate 480 can rotate by itself to reduce the pressure on the upper end surface of the aluminum plate, so that when the aluminum plate is stamped, it can drive the lower positioning block 460 and the movable plate 450 to slide along the length direction of the sliding rod 510, so that the position of the positioning block 460 can adapt to the material flow requirements during the stamping process of aluminum plates in different positions.

[0052] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0053] In this embodiment, a horizontal plate 500 is provided, a sliding rod 510 is provided on the horizontal plate 500, and the movable plate 450 and the positioning block 460 are divided into multiple sections, so that the positioning block 460 can adapt to the deformation requirements of the aluminum plate at different positions, while reducing the aluminum plate end margin that needs to be reserved.

[0054] Embodiment 3: Considering that the movable plate 450 in the above-mentioned embodiment 2 can slide relative to the sliding rod 510, since the aluminum plate is a whole, if the stretching amount of different stamped parts of the aluminum plate is very different, the part with more stretching may affect the movement of the movable plate 450 of other parts, so that the aluminum plate still has a certain risk of wrinkling, so it is necessary to improve the device, such as Fig.12 and Fig.13 As shown, the specific structure is as follows:

[0055] The lower end of the rotating circular block 420 is fixedly connected to a vertically arranged lower connecting rod 730, and a receiving plate 700 is fixed to the end of the lower connecting rod 730 away from the rotating circular block 420. The two ends of the receiving plate 700 in the length direction are respectively connected to the bottom ends of the two lower connecting rods 730. The receiving plate 700 is located below the gear rod 430, and the receiving plate 700 is parallel to the gear rod 430 in the length direction. The cross-section of the receiving plate 700 is rectangular, and a plurality of intelligent push rods 710 are fixed to the upper end surface of the receiving plate 700. The plurality of intelligent push rods 710 correspond one by one to the plurality of sliding rods 510. The output end of the smart push rod 710 faces the movable plate 450, and a segmented stretching plate 720 is fixed to the end of the output end of the smart push rod 710. The segmented stretching plate 720 is vertically arranged, and one side of the upper end of the segmented stretching plate 720 is fixedly connected to the end of the sliding rod 510 close to the lower mold body 100. The signals of multiple smart push rods 710 are all connected to the control system, so that the staff can set the push-out length of the smart push rod 710 according to the stamping shape combined with the strain hardening index table of the aluminum plate material, thereby limiting the maximum sliding position of the movable plate 450.

[0056] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0057] In this embodiment, the intelligent push rod 710 is provided to limit the maximum movement of each section of the movable plate 450, so that the movement of each section of the movable plate 450 is adapted to the stamping depth of the corresponding position, thereby avoiding the risk that the part of the aluminum plate with more stretching may affect the movement of other parts of the movable plate 450, thereby avoiding the possibility of wrinkling during the deformation process of the aluminum plate.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A processing die for an automobile body aluminum plate, comprising an upper die body (200) and a lower die body (100) that cooperate with each other in the vertical direction, wherein the upper die body (200) is arranged above the lower die body (100); characterized in that: Two rack plates (320) are fixed on the right side of the upper mold body (200), and a plurality of teeth are evenly distributed in the vertical direction on the side of the rack plate (320) away from the upper mold body (200); A fixing mechanism (400) is arranged at the top of the right side of the lower mold body (100), and the fixing mechanism (400) includes two fixing round blocks (410) and two fixing sleeves (440), and the two fixing round blocks (410) and the fixing sleeves (440) are symmetrically arranged in the front-back direction of the lower mold body (100), and the edge of the fixing round block (410) is fixedly connected to the lower mold body (100); the opposite surfaces of the two fixing round blocks (410) are coaxially connected to a rotating round block (420), and a gear rod (430) is coaxially fixed between the two rotating round blocks (420). Gears are coaxially fixed at both ends of the gear rod (430) in the length direction; the fixed sleeve (440) is horizontally arranged, and the fixed sleeve (440) is in the shape of a rectangular plate as a whole, and one end of the fixed sleeve (440) is fixedly connected to the rotating round block (420); a sliding groove (441) and a positioning pin hole (442) are provided on the fixed sleeve (440), and a moving plate (450), a positioning block (460), a cylinder (470) and a pressing plate (480) are provided between the two fixed sleeves (440); the pressing plate (480) and the positioning block (460) are respectively located on the upper and lower end surfaces of the aluminum plate, and are used to fix one end of the aluminum plate; The two gears are respectively arranged corresponding to the two rack plates (320). When the upper mold body (200) is punching downward, the rack plate (320) moves downward synchronously and meshes with the gear rod (430), so that the rack plate (320) drives the gear rod (430) to rotate, the gear rod (430) drives the rotating circular block (420) to rotate, and the rotating circular block (420) drives the fixed sleeve (440) to rotate counterclockwise.

2. The processing die for automobile body aluminum plate according to claim 1, characterized in that: The fixed sleeve (440) is provided with a sliding groove (441) along the length direction, and a plurality of positioning pin holes (442) are provided in the sliding groove (441) along the length direction thereof. A movable plate (450) is slidably connected between two sliding grooves (441), and the length direction of the movable plate (450) is perpendicular to the fixed sleeve (440). A positioning block (460) is fixed to the upper end of the movable plate (450), and a positioning block (460) is fixed to the lower end surface of the movable plate (450) at both ends of the positioning block (460). A cylinder (470), wherein the top of the cylinder (470) is connected to an output rod (471), wherein the output rod (471) vertically passes through the upper end surface of the movable plate (450), and a pressing plate (480) is fixed to the top of the two output rods (471), wherein the pressing plate (480) is arranged corresponding to the positioning block (460); a positioning pin shaft (444) is connected to the end of the movable plate (450), and the positioning pin shaft (444) passes through the positioning pin hole (442) and is plugged into the end of the movable plate (450); A limiting groove (411) is provided on one side of the fixed round block (410) close to the rotating round block (420), and the end of the rotating round block (420) is rotatably inserted into the limiting groove (411). A stopper (412) is fixed to the inner wall of the limiting groove (411), and there are two stoppers (412), one of which is located at one end of the limiting groove (411) close to the fixed sleeve (440) in the horizontal direction, and the other is located at the top of the limiting groove (411) in the vertical direction; a protrusion (421) is fixed to the side of the rotating round block (420) located in the limiting groove (411), and the protrusion (421) is located between the two stoppers (412).

3. The processing die for automobile body aluminum plate according to claim 2, characterized in that: A reset rope (443) is fixed to the lower part of one end of the fixing sleeve (440) away from the lower mold body (100); one end of the reset rope (443) away from the fixing sleeve (440) is fixed to the lower end of the side wall of the lower mold body (100); the reset rope (443) is made of elastic rubber material; the reset rope (443) is used to drive the fixing sleeve (440) to reset to a horizontal state when the fixing sleeve (440) is not subjected to external force.

4. The processing die for automobile body aluminum plate according to claim 3, characterized in that: The movable plate (450) and the positioning block (460) are evenly divided into multiple sections in the length direction. The multiple sections of the movable plate (450) are connected in series through an elastic tube (490). The elastic tube (490) is made of elastic rubber material. The elastic tube (490) is hollow inside and filled with electrorheological fluid (491). A transverse plate (500) is arranged on the side of the movable plate (450) away from the lower mold body (100). The transverse plate (500) is parallel to the movable plate (450). Both ends of the transverse plate (500) are respectively fixed to two The fixed sleeve (440) on the side is away from the end of the lower mold body (100), and a plurality of sliding rods (510) are slidably connected to the transverse plate (500), and the length direction of the sliding rods (510) is perpendicular to the length direction of the transverse plate (500), and the plurality of sliding rods (510) are spaced apart along the length direction of the transverse plate (500), and the plurality of sliding rods (510) correspond one by one to the plurality of movable plates (450), and each sliding rod (510) slides through each movable plate (450), and the cross-section of the sliding rod (510) is rectangular.

5. The processing die for automobile body aluminum plate according to claim 4, characterized in that: Each section of the movable plate (450) is provided with a sliding hole (451) perpendicular to its length direction. The sliding hole (451) is a rectangular through hole. The sliding hole (451) is slidably matched with the sliding rod (510). A liquid passage groove (452) is opened below the sliding hole (451). The opening direction of the liquid passage groove (452) is in the same direction as the length direction of the movable plate (450). The liquid passage groove (452) is matched with the elastic tube (490). The elastic tube (490) passes through the liquid passage groove (452) along the length direction of the movable plate (450).

6. The processing die for automobile body aluminum plate according to claim 5, characterized in that: A movable contact (414) is fixed to each end surface of the protrusion (421) relative to the two stoppers (412); a wire management groove (415) is provided inside the rotating circular block (420) on one side of the protrusion (421); the two movable contacts (414) are connected to an external power supply through electric wires through the wire management groove (415); and a fixed contact (413) is fixed to each end surface of the two stoppers (412) close to the protrusion (421). The fixed contacts (413) are connected in parallel via power supply lines (600), the power supply lines (600) are buried in the fixed round block (410), and the two power supply lines (600) in the two fixed round blocks (410) are respectively passed out of the fixed round blocks (410) at one end away from the fixed contacts (413) and passed outwardly into the two ends of the elastic tube (490); the part between the two power supply lines (600) located in the elastic tube (490) forms a current loop through the electrorheological fluid (491).

7. The processing die for automobile body aluminum plate according to claim 6, characterized in that: The cross section of the pressing plate (480) is circular, and the pressing plate (480) is a cylinder as a whole. The pressing plate (480) is provided with cylindrical holes (481) at both ends, and the inner end of the cylindrical hole (481) is provided with multi-sided holes (482) coaxially. The top ends of the two output rods (471) are respectively located at the two ends of the length direction of the pressing plate (480), and a cylinder (474) is fixed on the top end of the output rod (471) close to the side of the pressing plate (480). The cylinder (474) is inserted into the cylindrical hole (481) in the pressing plate (480), and the cylinder (474) and the pressing plate are connected. (480) is rotatably connected, an electric push rod (472) is fixed on the side of the output rod (471) away from the cylinder (474), and a polygonal push column (473) is fixed on the output end of the electric push rod (472), and the polygonal push column (473) passes through the output rod (471) and coaxially passes through the cylinder (474), and the polygonal push column (473) and the polygonal hole (482) are adapted to each other; the upper mold body (200) is externally connected to a control system, and the control system has a built-in processor, and the electric push rod (472) is connected to the control system signal.

8. The processing die for automobile body aluminum plate according to claim 7, characterized in that: The lower end of the rotating circular block (420) is fixedly connected to a vertically arranged lower connecting rod (730), and a receiving plate (700) is fixed to one end of the lower connecting rod (730) away from the rotating circular block (420). Both ends of the receiving plate (700) in the length direction are respectively connected to the bottom ends of the two lower connecting rods (730). The receiving plate (700) is located below the gear rod (430), and the receiving plate (700) is parallel to the gear rod (430) in the length direction. The cross section of the receiving plate (700) is rectangular.

9. The processing die for automobile body aluminum plate according to claim 8, characterized in that: A plurality of intelligent push rods (710) are fixed on the upper end surface of the receiving plate (700), and the plurality of intelligent push rods (710) correspond one-to-one to the plurality of sliding rods (510). The output ends of the intelligent push rods (710) face the movable plate (450), and a segmented stretching plate (720) is fixed to the ends of the output ends of the intelligent push rods (710).

10. The processing die for automobile body aluminum plate according to claim 9, characterized in that: The segmented stretching plate (720) is arranged vertically, and one side of the upper end of the segmented stretching plate (720) is fixedly connected to one end of the sliding rod (510) close to the lower mold body (100), and the plurality of intelligent push rods (710) are all connected to the control system by signal.

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