Continuous stamping die for aluminum alloy plate

Abstract

The invention belongs to the technical field of aluminum alloy stamping dies, and particularly relates to an aluminum alloy plate continuous stamping die which comprises an upper die base, a lower die base and an alignment sensor. An insulating cage with an opening facing the elastic block and a magnetic element fixed in the insulating cage are embedded in the upper die base, and die base assemblies used for pressing the aluminum alloy plate when the die base is meshed with the upper die base, two sets of steel balls and elastic reset pieces are arranged on the upper surface of the lower die base at intervals. Limiting guide wheels used for limiting the aluminum alloy plate towards the two sides and rotating shafts surrounded by the limiting guide wheels are rotationally installed below the two steel balls in each set, the lower ends of the rotating shafts are connected to elastic reset pieces, and the two sets of alignment sensors are arranged on the two sides of the aluminum alloy plate correspondingly. In the punching process, actions are decomposed to push a workpiece to be centered, the shaking effect of the workpiece in the punching process is absorbed, and the precision of continuously punched finished products is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of aluminum alloy stamping dies, and in particular relates to a continuous stamping die for aluminum alloy plates. Background Art

[0002] The processing of automotive aluminum alloy parts generally uses aluminum alloy sheets as raw materials and puts them into a stamping machine for punching and extrusion. For example, aluminum alloy tie bars, mounting blocks, etc., the upper and lower dies of the stamping die can carry punches to punch holes or extrude and bend the aluminum alloy sheets. Since the aluminum alloy sheet extends for a long period between the upper and lower dies, the extended part will rebound to a certain extent after extrusion, which is easy to cause deflection and needs to be limited from both sides.

[0003] Some manufacturers choose to install straightening pins with annular grooves on both sides of the aluminum alloy plate in the forward direction, and insert the two edges of the bent part into the annular grooves respectively to achieve straightening without hindering the movement of the extended part.

[0004] However, on the aluminum alloy tie-bar buckle production line, the flange and annular groove of the foot plate on the workpiece are difficult to adapt. In addition, the span of punching, grooving and bending of the workpiece is large, which causes it to shake after cutting, reducing the accuracy of the continuous stamping products. Summary of the invention

[0005] The purpose of the present invention is to provide a continuous stamping die for aluminum alloy plates, which can push the workpiece to the center during the stamping process by decomposing the action and absorb the shaking of the workpiece during the punching process, especially in the second half of the decomposing action, it can actively and quickly straighten the workpiece, thereby improving the precision of the continuous stamping product.

[0006] The technical solution adopted by the present invention is as follows: A continuous stamping die for aluminum alloy plates, comprising: An upper die base, a pressing head assembly and an elastic block are fixed at intervals on the lower surface of the upper die base, an insulating cage opened toward the elastic block and a magnetic element fixed inside the insulating cage are embedded inside the upper die base; A lower die seat, wherein the upper surface of the lower die seat is provided with a die seat assembly for pressing the aluminum alloy plate when engaging with the upper die seat, two groups of steel balls and an elastic reset member, and a limiting guide wheel for limiting the aluminum alloy plate toward both sides and a rotating shaft surrounded by the limiting guide wheel are rotatably installed below each group of two steel balls, and the lower end of the rotating shaft is connected to the elastic reset member; Alignment sensors, two groups of alignment sensors are respectively arranged on both sides of the aluminum alloy plate, and the detection light beams thereof pass through the gap between the upper die seat and the lower die seat, and the tails of the alignment sensors are fixed with cantilevers that are independent of the upper die seat and the lower die seat; During continuous stamping, the magnetic element intermittently attracts the steel ball and drives the elastic block to clamp the aluminum alloy plate, and pushes the limiting guide wheel to roll to both sides while squeezing the end of the aluminum alloy plate to the center to prevent shaking; When the mold is closed, the elastic reset member is compressed and linked to buffer the steel ball and the limiting guide wheel, and when the mold is released, the elastic reset member rebounds and links the steel ball to lift the aluminum alloy plate.

[0007] As a preferred solution, the die base assembly includes two aligning clamp seats with openings facing each other, two side-by-side V-shaped clamp seats, two side-by-side concave clamp seats and a central convex clamp seat, which are arranged in sequence along the center line of the lower die base. A group of two steel balls are arranged between the aligning clamp seat and the V-shaped clamp seat, and another group of two steel balls are arranged on the side of the convex clamp seat away from the aligning clamp seat. After the aluminum alloy sheet is fed into the continuous stamping die, its two sides are respectively passed through the openings of the two aligning clamp seats to obtain vertical support, so that the Y-shaped holes and side holes can be punched, and then the V-shaped feet are supported by the V-shaped clamp seat, the flanging is supported by the concave clamp seat, and the convex clamp seat is used to limit the folding feet on both sides.

[0008] As a preferred solution, the elastic block is configured as honeycomb-shaped silicone, and the magnetic element is configured as an electromagnet. When the electromagnet is energized, it attracts the steel ball and the elastic block to clamp the aluminum alloy plate and transfers heat along the elastic block to heat the aluminum alloy plate, which is used to reduce the hardness of the aluminum alloy plate at the stamping point. The electromagnet remains energized. The advantage of this is that it can attract the steel ball to lift the aluminum alloy plate, so that the aluminum alloy plate is suspended on the die base assembly, and it can be powered off to save energy when not needed, and the magnetic element can be buffered by the deformation of the elastic block to prevent mechanical damage.

[0009] As a preferred solution, guide cylinders with downward openings are fixed to the four corners of the upper die base, and air springs engaged with the guide cylinders are fixed to the four corners of the lower die base.

[0010] As a preferred embodiment, the punch assembly includes a first punch aligned with the middle of the two alignment clamps and arranged in sequence along the center line of the upper die seat, a second punch facing between the alignment clamp and the V-shaped clamp, a first wedge-shaped punch facing the V-shaped clamp, a second wedge-shaped punch facing the concave clamp and a concave punch facing the convex clamp. In the punching action of the Y-shaped hole and the side hole, the first punch and the second punch are designed to be double-angled and distributed on both sides of the center line of the aluminum alloy plate so as to punch out two Y-shaped holes and the side hole at the same time, and then pass it to the third punch to punch out the side groove. Although the side groove is a technical means well known to technicians in this field, it is still necessary to separate two adjacent workpieces. Then, the aluminum alloy is pressed into the V-shaped clamp by the first wedge-shaped punch to press out the V-shaped foot, and the aluminum alloy is pressed into the concave clamp by the second wedge-shaped punch to press out the flange, and the opening of the concave punch is clamped with the convex clamp to extrude the V-shaped foot with the flange and bend it into a folded foot.

[0011] As a preferred solution, a slag discharge hole facing the first punch and the second punch is opened on the lower die base, a support plate is fixed inside the slag discharge hole along the moving direction of the aluminum alloy plate, and two waste slag buckets facing the first punch and the second punch respectively are fixed below.

[0012] As a preferred solution, two top punching heads are fixed at intervals on the lower surface of the upper die base, two bottom punching heads offset from the top punching heads are fixed on the upper surface of the lower die base, a waste edge dropping hole is provided on the lower die base between the two bottom punching heads, and two workpiece chutes are fixed on the end surface of the lower die base on both sides of the two bottom punching heads.

[0013] As a preferred embodiment, the elastic reset part includes two square columns fixed side by side on the upper surface of the lower mold base, the outer sleeve of the square columns is provided with an elastic sleeve in contact with the lower mold base, a metal bushing and a torsion spring spirally arranged on the outer side of the metal bushing, a swing arm is connected between the outer side of the metal bushing and the lower end of the rotating shaft through the torsion spring, and both ends of the swing arm are annular, one ring of the swing arm is sleeved on the lower end of the rotating shaft, and the other ring is sleeved on the outside of the metal bushing, once the mold is loaded, the elastic sleeve is pressed down for buffering, and when the load is unloaded, the elastic sleeve rebounds to lift the steel ball and the limiting guide wheel, so that the steel ball and the limiting guide wheel float synchronously with the aluminum alloy plate, and when the workpiece moves forward, it hits the limiting guide wheel to drive the swing arm to rotate forward a certain amplitude relative to the metal bushing, and compress the torsion spring, so as to facilitate the two limiting guide wheels to sink into the workpiece, and can also reverse a certain amplitude through the rebound of the torsion spring after disengagement, so as to contact the subsequent workpiece.

[0014] As a preferred solution, two truncated table members and a truss frame located between the two truncated table members are fixed to the upper ends of two adjacent square columns, and the truss frame is flush with the support plate.

[0015] As a preferred solution, a limit baffle and a waste edge bucket fixedly connected to the limit baffle are fixed to the lower opening of the waste edge falling hole, and the waste edge bucket is staggered from the workpiece chute.

[0016] The technical effects achieved by the present invention are: The present invention decomposes the actions during the stamping process. At the intervals of the decomposed actions, a limiting guide wheel with two directions of freedom is used to push the workpiece to the center on both sides, and can press down the elastic reset part for buffering. It can also rise and fall with the elastic reset part without separating from the workpiece, and absorb the shaking of the workpiece during the punching process. Especially in the second half of the decomposed action, the workpiece can be actively and quickly straightened, thereby improving the accuracy of the finished product of continuous stamping.

[0017] The present invention sets the elastic block as honeycomb-shaped silicone, and sets the magnetic element as an electromagnet. When the electromagnet is energized, it attracts the steel ball and the elastic block to clamp the aluminum alloy plate and transfers heat along the elastic block to heat the aluminum alloy plate, which is used to reduce the hardness of the stamped part of the aluminum alloy plate. The electromagnet remains energized. This has the advantage of attracting the steel ball to lift the aluminum alloy plate, so that the aluminum alloy plate is suspended on the die base assembly, and the power can be cut off when not needed to save energy. The magnetic element is buffered by the deformation of the elastic block to prevent mechanical damage.

[0018] Once the mold is closed and loaded, the elastic sleeve is pressed down for buffering. When the load is unloaded, the elastic sleeve rebounds to lift the steel ball and the limiting guide wheel, so that the steel ball and the limiting guide wheel float synchronously with the aluminum alloy plate. When the workpiece moves forward, it hits the limiting guide wheel to drive the swing arm to rotate forward a certain amplitude relative to the metal bushing and compress the torsion spring, so that the two limiting guide wheels can be immersed in the workpiece. After separation, they can also reverse a certain amplitude through the rebound of the torsion spring to contact the subsequent workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view of a continuous stamping die for aluminum alloy plates of the present invention; Figure 2 It is a schematic diagram of processing the aluminum alloy plate of the present invention into an aluminum alloy tie bar buckle; Figure 3 is a bottom view of the upper die seat of the present invention; Figure 4 is a top view of the lower die base of the present invention; Figure 5 is a bottom view of the lower die base of the present invention; Figure 6 It is an exploded view of the insulating cage, magnetic element and elastic block of the present invention; Figure 7 is a top view of the V-shaped clamp seat of the present invention; Figure 8 is a top view of the concave clamp seat of the present invention; Fig. 9 is a top view of the convex clamp seat of the present invention; Fig.10 is a bottom view of the first punch of the present invention; Fig.11 is a bottom view of the second punch of the present invention; Fig.12 is a bottom view of the concave indenter of the present invention; Fig.13 is a top view of the bottom punching head of the present invention; Fig.14 is a bottom view of the top punching head of the present invention; Fig.15 It is a front view of the elastic reset member supporting the truncated table member and the truss frame of the present invention; Fig.16 It is an exploded view of the elastic reset member of the present invention.

[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Upper die seat; 2. Insulation cage; 3. Magnetic element; 4. Elastic block; 5. Lower die seat; 6. Steel ball; 7. Rotating shaft; 8. Limiting guide wheel; 9. Alignment sensor; 10. Cantilever; 11. Alignment clamp seat; 12. V-shaped clamp seat; 13. Concave clamp seat; 14. Convex clamp seat; 15. Guide cylinder; 16. Air spring; 17. First punch; 18. Second punch; 19. First wedge-shaped pressure head; 20 , second wedge-shaped pressure head; 21, concave pressure head; 22, slag discharge hole; 23, support plate; 24, waste slag bucket; 25, bottom punching head; 26, top punching head; 27, waste edge drop hole; 28, workpiece chute; 29, swing arm; 30, square column; 31, elastic sleeve; 32, metal bushing; 33, torsion spring; 34, round table; 35, truss frame; 36, limit baffle; 37, waste edge bucket; 38, waste edge. DETAILED DESCRIPTION

[0021] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention.

[0022] like Figure 1-Figure 16As shown, a continuous stamping die for aluminum alloy plates can be used in an aluminum alloy tie bar buckle production line, including an upper die base 1, a lower die base 5 and an alignment sensor 9. An automated feeding method is mainly used, such as a conveyor belt, a feeding roller, etc., to feed the aluminum alloy plate between the upper die base 1 and the lower die base 5, and the aluminum alloy plate is controlled to stop short. A pressure head assembly is fixed at intervals on the lower surface of the upper die base 1, and a die base assembly for pressing the aluminum alloy plate when engaging with the upper die base 1 is fixed on the upper surface of the lower die base 5. The aluminum alloy plate is stamped by the pressure head assembly and the die base assembly to punch out Y-shaped holes, side holes and side grooves in turn, and then bend out V-shaped feet, flanges, and folded feet in turn, and finally the waste edges 38 are cut off to produce workpieces in pairs (such as Figure 2 as shown).

[0023] As an optional embodiment, in order to maintain the balance of the continuous stamping die, the lower die base 5 is fixed at the loading station, and the upper die base 1 is suspended above the lower die base 5 through a hydraulic system. During the short stop of loading, it descends to cooperate with the lower die base 5 to stamp the aluminum alloy sheet. In this way, intermittent stamping is performed, and the aluminum alloy sheet is fed one material level each time.

[0024] Refer to the attached Figure 1 , Figure 3 and Figure 4 Each decomposition action of the aluminum alloy sheet stamping needs to be supported. For this purpose, the die base assembly of this embodiment includes two openings facing each other and two side-by-side V-shaped clamps 12 (such as Figure 7 As shown), two concave clamp seats 13 arranged side by side (as shown Figure 8 As shown) and the central convex clamp seat 14 (as Fig. 9 As shown in the figure, after the aluminum alloy sheet is fed into the continuous stamping die, its two sides are respectively passed through the openings of the two alignment clamp seats 11 to obtain vertical support, so that the Y-shaped hole and the side hole can be punched, and then the V-shaped foot is supported by the V-shaped clamp seat 12, the flanging is supported by the concave clamp seat 13, and the convex clamp seat 14 is used to limit the folding feet on both sides. For the convenience of replacement and maintenance, the alignment clamp seat 11, the V-shaped clamp seat 12, the concave clamp seat 13 and the convex clamp seat 14 are fixed by bolts.

[0025] Refer to the attached Figure 1 , Figure 3 and Figure 4 Different actions in the decomposition action need to make the required shape, and each action is designed separately. The pressure head assembly of this embodiment includes a first punch 17 (such as Fig.10 As shown), toward the second punch 18 between the alignment clamp seat 11 and the V-shaped clamp seat 12 (as shown Fig.11As shown), a third square punch, a first wedge-shaped pressing head 19 facing the V-shaped clamp seat 12, a second wedge-shaped pressing head 20 facing the concave clamp seat 13, and a concave pressing head 21 facing the convex clamp seat 14 (as shown Fig.12 As shown), in the punching action of the Y-shaped hole and the side hole, the first punch 17 and the second punch 18 are designed to be double-angled shapes distributed on both sides of the center line of the aluminum alloy plate so as to punch out two Y-shaped holes and the side hole at the same time, and then pass it to the third punch to punch out the side groove. Although the side groove is a technical means well known to technicians in this field, the side groove can separate two adjacent workpieces and is still necessary. Then, the aluminum alloy is pressed into the V-shaped clamp seat 12 by the first wedge-shaped press head 19 to press out the V-shaped foot, and the aluminum alloy is pressed into the concave clamp seat 13 by the second wedge-shaped press head 20 to press out the flange, and the opening of the concave press head 21 is clamped with the convex clamp seat 14 to squeeze the V-shaped foot with the flange and bend it into a folded foot. For the convenience of replacement and maintenance, the first punch 17, the second punch 18, the third punch, the first wedge-shaped press head 19, the second wedge-shaped press head 20 and the concave press head 21 are fixed by bolts.

[0026] Furthermore, in order to facilitate fast, accurate and ruthless punching or slotting, the present embodiment can also use a hydraulic cylinder to move the first punch 17, the second punch 18 and the third punch, especially in the short stop time after the mold is closed. After the other parts of the aluminum alloy sheet are pressed, the first punch 17, the second punch 18 and the third punch can be driven by hydraulic feed to punch out holes or slots, thereby preventing the aluminum alloy sheet from being pulled or shaken.

[0027] Refer to the attached Figure 4 , Fig.15 and Fig.16 The edge of the aluminum alloy sheet at the punching position becomes narrower, so two groups of steel balls 6 and elastic reset parts are arranged at intervals on the upper surface of the lower die seat 5. One group of two steel balls 6 is arranged between the alignment clamp seat 11 and the V-shaped clamp seat 12, and is used to support the aluminum alloy sheet when it crosses the punching groove and the V-shaped foot pressing action. The other group of two steel balls 6 is arranged on the side of the convex clamp seat 14 away from the alignment clamp seat 11, and is used to support the upstream area of ​​the cut position of the aluminum alloy sheet. Under each group of two steel balls 6, a limiting guide wheel 8 for limiting the aluminum alloy sheet to both sides and a rotating shaft 7 surrounded by the limiting guide wheel 8 are rotatably installed, which can keep the steel balls 6 and the limiting guide wheel 8 suspended, and the lower end of the rotating shaft 7 is connected to the elastic reset part, so that the steel balls 6 and the limiting guide wheel 8 can drive the rotating shaft 7 to press down the elastic reset part while rotating, leaving a vertical displacement buffer zone, which will not hinder the aluminum alloy sheet from sinking into the die seat assembly.

[0028] Among them, the lower wall of the workpiece sticks to the steel ball 6, and the inner side sticks to the limit guide wheel 8, and slides forward. Three limit guide wheels 8 are installed on the outside of each rotating shaft 7 through the bearing seat, and three rotating yokes supporting the limit guide wheel 8 are welded on the outside of the bearing seat. It is convenient for the limit guide wheel 8 to revolve around the rotating shaft 7 while rotating with the friction of the workpiece, and has two degrees of freedom in two directions. In this way, the workpiece is pushed to the center on both sides, and can also be raised and lowered with the elastic reset part without separating from the workpiece, absorbing the shaking effect of the workpiece during the punching process, especially in the second half of the decomposition action, the workpiece can be actively and quickly straightened to achieve improved precision of the continuous stamping product.

[0029] Refer to the attached Figure 3 , Figure 6 and Fig.15 In the action of the steel ball 6 supporting the workpiece, an elastic block 4 facing the steel ball 6 is bonded to the lower surface of the upper die base 1, which is used to cooperate with the steel ball 6 to clamp the aluminum alloy plate after the upper die base 1 is pressed down, and an insulating cage 2 opening toward the elastic block 4 and a magnetic element 3 bonded to the inside of the insulating cage 2 are embedded in the upper die base 1. The magnetic field of the magnetic element 3 in the insulating cage 2 attracts the steel ball 6 made of magnetic metal to better clamp it, and the steel ball 6 can be pulled to slightly lift the aluminum alloy plate during demolding, so that the aluminum alloy plate is suspended above the die base assembly with a height of no more than one centimeter.

[0030] Furthermore, during continuous stamping, the magnetic element 3 intermittently attracts the steel ball 6 and drives the elastic block 4 to clamp the aluminum alloy plate, and pushes the limiting guide wheel 8 to roll to both sides while squeezing the end of the aluminum alloy plate to the center to prevent shaking.

[0031] Refer to the attached Figure 1 When straightening the aluminum alloy plate, limit detection is very necessary. Two sets of alignment sensors 9 are respectively arranged on both sides of the aluminum alloy plate, and their detection light beams pass through the interval between the upper die seat 1 and the lower die seat 5 and are distributed on both sides of the folding foot. Once the aluminum alloy plate is skewed, the detection light beam on the adjacent side will be blocked, triggering an alarm signal, which will be sent to the industrial computer of the processing station through a signal converter, so as to facilitate timely shutdown and calibration of the steel ball 6, the rotating shaft 7, the limit guide wheel 8 and the elastic reset part, and a cantilever 10 independent of the upper die seat 1 and the lower die seat 5 is fixed at the tail of the alignment sensor 9 by screws to avoid blocking the mold closing.

[0032] Refer to the attached Figure 1 , Figure 3 and Figure 4In order to facilitate smoother mold closing, guide cylinders 15 with downward openings are fixed to the four corners of the upper mold base 1 by bolts, and air springs 16 engaged with the guide cylinders 15 are fixed to the four corners of the lower mold base 5 by bolts. The air springs 16 are inserted into the guide cylinders 15 to straighten the four corners, and the compressed air springs 16 are used for buffering and shock absorption. At the same time, the elastic reset member is compressed to link the buffer steel ball 6 and the limiting guide wheel 8. During demolding, the elastic reset member rebounds to link the steel ball 6 to lift the aluminum alloy plate, which responds quickly and significantly reduces the sliding friction between the aluminum alloy plate and the mold base assembly.

[0033] Refer to the attached Figure 4 and Figure 5 During the punching of the Y-shaped hole and the side hole, waste slag is generated. In this embodiment, a slag discharge hole 22 facing the first punch 17 and the second punch 18 is opened on the lower die base 5, so that the waste slag falls along the slag discharge hole 22, and a support plate 23 is welded inside the slag discharge hole 22 along the moving direction of the aluminum alloy plate, and two waste slag buckets 24 facing the first punch 17 and the second punch 18 are welded below. The waste slag is received by the waste slag bucket 24 and guided to slide obliquely downward to avoid accumulation at the lower die base 5.

[0034] Refer to the attached Figure 3 , Figure 6 and Fig.15 As an optional embodiment, the elastic block 4 is set to honeycomb-shaped silicone, and the magnetic element 3 is set to an electromagnet. During the mold closing process, when the electromagnet is energized, it attracts the steel ball 6 and the elastic block 4 to clamp the aluminum alloy plate and transfers heat along the elastic block 4 to heat the aluminum alloy plate, which is used to reduce the hardness of the aluminum alloy plate at the stamping point. In addition, during the demolding process, the electromagnet remains energized until the upper mold base 1 is lifted and reset and then powered off. The advantage of this is that it can attract the steel ball 6 to lift the aluminum alloy plate, so that the aluminum alloy plate is suspended on the mold base assembly, and it can be powered off when not needed to save energy, and the magnetic element 3 can be buffered by the deformation of the elastic block 4 to prevent mechanical damage.

[0035] Refer to the attached Fig.15 and Fig.16Due to the continuous stamping of the aluminum alloy sheet, there is friction between the elastic reset member and the elastic reset member. The elastic reset member of this embodiment includes two square columns 30 welded side by side on the upper surface of the lower die seat 5. At this time, the square column 30 is facing the middle of the aluminum alloy sheet. An elastic sleeve 31 in contact with the lower die seat 5, a metal bushing 32 and a torsion spring 33 spirally arranged on the outer side of the metal bushing 32 are sleeved on the outside of the square column 30. They are all arranged below the workpiece so that the workpiece will not be scratched. A swing arm 29 is connected between the outside of the metal bushing 32 and the lower end of the rotating shaft 7 through the torsion spring 33. Both ends of the swing arm 29 are ring-shaped, one of which is A ring is sleeved on the lower end of the rotating shaft 7 to support the steel ball 6 and the limiting guide wheel 8 in the air, and the other ring is sleeved on the outside of the metal bushing 32. Once loaded, the elastic sleeve 31 is pressed down for buffering. When the load is unloaded, the elastic sleeve 31 rebounds and lifts the steel ball 6 and the limiting guide wheel 8, so that the steel ball 6 and the limiting guide wheel 8 can float synchronously with the aluminum alloy plate. When the workpiece moves forward, it hits the limiting guide wheel 8 to drive the swing arm 29 to rotate forward a certain amplitude relative to the metal bushing 32, and compress the torsion spring 33, so that the two limiting guide wheels 8 can be immersed in the workpiece. After detachment, they can also reverse a certain amplitude through the rebound of the torsion spring 33 to contact the subsequent workpiece.

[0036] Refer to the attached Fig.15 and Fig.16 Two truncated table members 34 and a truss frame 35 located between the two truncated table members 34 are welded at the upper ends of two adjacent square columns 30. The truss frame 35 is flush with the support plate 23 and is used to support the workpiece in the second half to facilitate the aluminum alloy plate to remain horizontal.

[0037] Refer to the attached Figure 4 , Fig.13 and Fig.14 In order to cut off the waste edge 38, two spaced top punching heads 26 are fixed to the lower surface of the upper die base 1 by bolts, and two bottom punching heads 25 staggered with the top punching heads 26 are fixed to the upper surface of the lower die base 5 by bolts. The top punching heads 26 and the bottom punching heads 25 are engaged with each other to punch the two sides of the waste edge 38 to achieve separation from the workpiece. In order to independently collect the waste edge 38, a waste edge drop hole 27 is opened on the lower die base 5 between the two bottom punching heads 25 to guide the waste edge 38 to slide down. Two workpiece chutes 28 located on both sides of the two bottom punching heads 25 are fixed to the end surface of the lower die base 5 by bolts to synchronously receive the workpieces cut off on both sides.

[0038] Refer to the attached Figure 4 and Figure 5 In order to prevent the scrap edges 38 from flying away, in this embodiment, a limiting baffle 36 and a scrap edge bucket 37 connected to the limiting baffle 36 by bolts are fixed at the opening below the scrap edge falling hole 27. The scrap edges 38 slide down along the scrap edge bucket 37, and the scrap edge bucket 37 drives the scrap edges 38 to stagger the workpiece chute 28 and be collected separately without the need for subsequent sorting.

[0039] The working principle of the present invention is as follows: when the upper die base 1 and the lower die base 5 are closed, the aluminum alloy plate is punched out by the pressure head assembly and the die base assembly, and Y-shaped holes, side holes and side grooves are punched out in sequence, and then V-shaped feet, flanges and folded feet are bent in sequence.

[0040] During the punching process, the lower wall of the workpiece sticks to the steel ball 6, and the elastic sleeve 31 is pressed down for buffering. The inner side of the workpiece sticks to the limiting guide wheel 8 and slides forward. At this time, the limiting guide wheel 8 rotates with the friction of the workpiece and revolves around the rotating axis 7. It has two degrees of freedom in two directions, so that the workpiece is pushed to the center on both sides, and can also be raised and lowered with the elastic reset part without separating from the workpiece, absorbing the shaking effect of the workpiece during the punching process, especially in the second half of the decomposition action, it can actively and quickly straighten the workpiece.

[0041] When the load is unloaded, the elastic sleeve 31 rebounds and lifts the steel ball 6 and the limiting guide wheel 8, so that the steel ball 6 and the limiting guide wheel 8 float synchronously with the aluminum alloy plate. When the workpiece moves forward, it hits the limiting guide wheel 8, driving the swing arm 29 to rotate forward a certain amplitude relative to the metal bushing 32, and compresses the torsion spring 33, so that the two limiting guide wheels 8 can be immersed in the interior of the workpiece. After detachment, they can also reverse a certain amplitude through the rebound of the torsion spring 33 to contact the subsequent workpiece.

[0042] Finally, the top punching head 26 and the bottom punching head 25 engage and press the two sides of the waste edge 38 to achieve separation from the workpiece. The workpiece cut off on both sides is received by the workpiece chute 28, and the waste edge bucket 37 drives the waste edge 38 to stagger the workpiece chute 28 and collect it separately without subsequent sorting.

[0043] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. A continuous stamping die for aluminum alloy sheets, characterized in that: include: An upper die base (1), a pressing head assembly and an elastic block (4) being fixed at intervals on the lower surface of the upper die base (1), an insulating cage (2) opening toward the elastic block (4) and a magnetic element (3) fixed inside the insulating cage (2) being embedded inside the upper die base (1); A lower die base (5), the upper surface of which is provided with a die base assembly for pressing the aluminum alloy plate when engaging with the upper die base (1), two groups of steel balls (6) and an elastic reset member, each group of two steel balls (6) being rotatably mounted with a limiting guide wheel (8) for limiting the aluminum alloy plate toward both sides and a rotating shaft (7) surrounded by the limiting guide wheel (8), the lower end of the rotating shaft (7) being connected to the elastic reset member; Positioning sensors (9), two groups of the positioning sensors (9) are respectively arranged on both sides of the aluminum alloy plate, and their detection light beams pass through the gap between the upper die base (1) and the lower die base (5), and the tails of the positioning sensors (9) are fixed with cantilevers (10) that are independent of the upper die base (1) and the lower die base (5); During continuous stamping, the magnetic element (3) intermittently attracts the steel ball (6) and drives the elastic block (4) to clamp the aluminum alloy plate, and pushes the limiting guide wheel (8) to roll and extrude the aluminum alloy plate to center its end; When the mold is closed, the elastic reset member is compressed to link and cushion the steel ball (6) and the limiting guide wheel (8), and when the mold is released, the elastic reset member rebounds to link and lift the aluminum alloy plate.

2. The aluminum alloy sheet continuous stamping die according to claim 1, characterized in that: The die base assembly comprises two aligning clamp seats (11) with openings facing each other, two side-by-side V-shaped clamp seats (12), two side-by-side concave clamp seats (13) and a central convex clamp seat (14) which are sequentially arranged along the center line of the lower die base (5); a group of two steel balls (6) are arranged between the aligning clamp seats (11) and the V-shaped clamp seats (12); and another group of two steel balls (6) are arranged on a side of the convex clamp seat (14) away from the aligning clamp seat (11).

3. The aluminum alloy sheet continuous stamping die according to claim 1, characterized in that: The elastic block (4) is a honeycomb-shaped silica gel, and the magnetic element (3) is an electromagnet, which attracts the steel ball (6) and the elastic block (4) to clamp the aluminum alloy plate when electricity is turned on, and transfers heat along the elastic block (4) to heat the aluminum alloy plate, so as to reduce the hardness of the aluminum alloy plate at the stamping location.

4. The aluminum alloy sheet continuous stamping die according to claim 1, characterized in that: Guide cylinders (15) with openings facing downwards are fixed to the four corners of the upper die base (1), and air springs (16) inserted into the guide cylinders (15) are fixed to the four corners of the lower die base (5).

5. The aluminum alloy sheet continuous stamping die according to claim 2, characterized in that: The punch assembly comprises a first punch (17) arranged in sequence along the center line of the upper die seat (1) and aligned with the middle of the two alignment clamp seats (11), a second punch (18) facing between the alignment clamp seats (11) and the V-shaped clamp seat (12), a first wedge-shaped punch (19) facing the V-shaped clamp seat (12), a second wedge-shaped punch (20) facing the concave clamp seat (13), and a concave punch (21) facing the convex clamp seat (14), wherein the first punch (17) and the second punch (18) are double-angled and distributed on both sides of the center line of the aluminum alloy plate, and the opening of the concave punch (21) is clamped with the convex clamp seat (14).

6. The aluminum alloy sheet continuous stamping die according to claim 5, characterized in that: The lower die base (5) is provided with a slag discharge hole (22) facing the first punch (17) and the second punch (18); a support plate (23) is fixed inside the slag discharge hole (22) along the travel direction of the aluminum alloy plate, and two waste slag buckets (24) are fixed below the slag discharge hole and facing the first punch (17) and the second punch (18) respectively.

7. The aluminum alloy sheet continuous stamping die according to claim 1, characterized in that: Two top punching heads (26) are fixed at intervals on the lower surface of the upper die base (1); two bottom punching heads (25) offset from the top punching heads (26) are fixed on the upper surface of the lower die base (5); a waste edge drop hole (27) is provided on the lower die base (5) between the two bottom punching heads (25); and two workpiece chutes (28) located on both sides of the two bottom punching heads (25) are fixed on the end surface of the lower die base (5).

8. The aluminum alloy sheet continuous stamping die according to claim 6, characterized in that: The elastic reset member comprises two square columns (30) fixed side by side on the upper surface of the lower die base (5); the square columns (30) are externally sleeved with an elastic sleeve (31) in contact with the lower die base (5), a metal bushing (32) and a torsion spring (33) spirally arranged on the outer side of the metal bushing (32); a swing arm (29) is connected between the outer side of the metal bushing (32) and the lower end of the rotating shaft (7) via the torsion spring (33); both ends of the swing arm (29) are ring-shaped; one ring of the swing arm (29) is sleeved on the lower end of the rotating shaft (7), and the other ring is sleeved on the outer side of the metal bushing (32).

9. The aluminum alloy sheet continuous stamping die according to claim 8, characterized in that: Two truncated platform members (34) and a truss frame (35) located between the two truncated platform members (34) are fixed to the upper ends of two adjacent square columns (30), and the truss frame (35) is flush with the support plate (23).

10. The aluminum alloy sheet continuous stamping die according to claim 7, characterized in that: A limit baffle (36) and a waste edge bucket (37) fixedly connected to the limit baffle (36) are fixed to the lower opening of the waste edge drop hole (27), and the waste edge bucket (37) is staggered from the workpiece chute (28).

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