Die structure for cutting, bending and integrally producing metal strip

Abstract

The utility model discloses a die structure used for cutting, bending and integral forming of a metal strip, which relates to the field of metal section punch forming and comprises an upper die and a lower die, the upper die comprises an upper die holder, an upper fixing plate, a cutting punch and a bending punch, the upper fixing plate is arranged below the upper die holder, and the cutting punch and the bending punch are arranged below the upper die holder. The lower die comprises a pressing plate which is opposite to the cutting punch and is used for placing a metal strip, a bending concave die which is opposite to the bending punch, a positioning stop block which is arranged on the outer side of the bending concave die, a lower fixing plate which is positioned below the pressing plate and the bending concave die, a lower die holder which is arranged below the lower fixing plate, and a reset spring which is fixedly arranged between the pressing plate and the lower die holder; blanking holes for discharging products are formed in the middle of the lower fixing plate and the middle of the lower die base. An arc-shaped opening is formed in the upper end of the bending female die. By means of the mold structure, the machining efficiency of metal strip forming is improved, the working procedures are combined into one, and therefore mold expenditure is reduced; and meanwhile, manual workpiece taking is replaced with automatic workpiece discharging, and potential safety hazards are eliminated.

Description

Technical Field

[0001] The utility model relates to the field of metal profile stamping and forming, in particular to a die structure used for cutting, bending and integrally producing metal strips. Background Art

[0002] Stamping and forming operations are often required during the processing of metal profiles. The existing processing technology adopts two processes, cutting and forming. First, the material is cut with a mold, and then bent into a U shape with a bending mold. The U-shaped bending process requires manual placement of parts and removal of products after processing. The safety is poor and the processing efficiency is not high. Two sets of molds are required to complete the process, which increases the mold manufacturing cost and time cost.

[0003] In the prior art, the utility model patent with publication number CN 206046936 U discloses a simple U-shaped bending machine, which adopts the method of sliding the guide column to connect the guide column sleeve hole to realize the up and down movement of the punching block; the cylinder on the upper end of the cylinder support plate is fixedly connected to the punching block support plate through the connecting block, realizing the rapid punching action of the punching block; a part installation groove is formed between the two support plates, which is convenient for positioning and fixing the equipment parts; the material and the support plate form a material groove, which is convenient for placing the material to be processed; the upper end surface of the baffle is higher than the upper end surface of the die, so that the front of the baffle can be used to align the ends of multiple steel bars in the material groove, ensuring the consistency of the length of the steel bar bending; a U-shaped groove is set in the die, which cooperates with the punching block to complete the bending of the steel bar. Although the device can process multiple steel bar materials at the same time, it cannot realize the automatic output of the product, and the cutting operation also requires another mold structure to complete.

[0004] The improved mold structure is that shearing and bending are completed using a set of molds, and the parts can be automatically ejected through the blanking holes set at the bottom, without the need for manual operation. Utility Model Content

[0005] The utility model aims to provide a die structure for cutting, bending and integrally producing metal strips, so as to solve the problems existing in the above-mentioned background technology.

[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted is: a mold structure for cutting, bending and integrally producing metal strips, comprising an upper mold and a lower mold, wherein the upper mold comprises an upper mold base, an upper fixing plate fixed below the upper mold base by fasteners, a cutting punch fixed below the upper fixing plate by fasteners, and a bending punch fixed below the upper mold base by fasteners; the lower mold comprises a pressing plate opposite to the cutting punch, a bending die opposite to the bending punch, a positioning block installed on the outside of the bending die, a lower fixing plate located below the pressing plate and the bending die, and a fixing plate fixed by fasteners to the lower mold base. A lower die base is fixed below the lower fixed plate, and a reset spring is fixed between the pressure plate and the lower die base, and the bending die is fixed to the lower fixed plate by fasteners; a blanking hole is provided in the middle of the lower fixed plate and the lower die base, which passes through the two and is located directly below the bending die for discharging the product after bending; the upper end opening of the bending die is an arc-shaped opening; the pressure plate is movably connected to the lower fixed plate by a countersunk screw, and the countersunk screw can move up and down in the screw hole in the middle of the lower fixed plate as the reset spring moves up and down; the bending die is fixed to the lower fixed plate by fasteners.

[0007] The metal strip to be processed may be one of steel bars, aluminum alloys, and titanium alloys.

[0008] Specifically, the shape of the bending punch can be changed according to the bending shape requirements of the product.

[0009] Specifically, the fasteners include but are not limited to fastening bolts, countersunk screws, or a combination of the two.

[0010] The mold structure can realize the continuous bending operation of the metal strip by using the positioning block and the configured feeding mechanism.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The mold structure improves the efficiency of metal strip forming processing, reduces mold expenses, combines two metal forming processes into one, and avoids the safety hazards caused by manual placement of parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a simplified structural diagram of the mold opening state of an embodiment of the utility model;

[0014] Figure 2 This is a simplified structural diagram of the mold opening state of an embodiment of the utility model;

[0015] Figure 3 This is a product structure diagram of an embodiment of the utility model;

[0016] Figure 4 It is a top view of the protective insert according to the embodiment of the utility model.

[0017] In the figure: 1, upper die base, 2, upper fixing plate, 3, cutting punch, 4, bending punch, 5, positioning block, 6, pressing plate, 7, bending die, 8, lower fixing plate, 9, lower die base, 10, return spring, 11, blanking hole, 12, steel bar, 12', product, 13, protective insert, 14, screw hole. DETAILED DESCRIPTION

[0018] The present invention will be further explained and illustrated below in conjunction with the accompanying drawings and embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0019] Example 1: Please refer to Figure 1 and Figure 2 A mold structure for cutting, bending, and integrated production of steel bars, including an upper mold and a lower mold, wherein the upper mold includes an upper mold base 1, an upper fixing plate 2 fixed to the lower part of the upper mold base 1 with countersunk screws, a cutting punch 3 fixed to the lower part of the upper fixing plate 2 with fastening bolts, and a bending punch 4 fixed to the lower part of the upper mold base 1 with fastening bolts, and the lower mold includes a pressing plate 6 opposite to the cutting punch 3, a bending die 7 opposite to the bending punch 4, a positioning block 5 installed on the outer side of the bending die 7, a lower fixing plate 8 located below the pressing plate 6 and the bending die 7, a lower mold base 9 fixed to the lower part of the lower fixing plate 8 with fastening bolts, and a fixing plate 9 disposed on the lower part of the lower mold base 9. The return spring 10 is arranged between the pressing plate 6 and the lower die seat 9. A blanking hole 11 is provided between the lower fixed plate 8 and the lower die seat 9, which runs through the two and is located directly below the bending die 7. The upper end opening of the bending die 7 is an arc-shaped opening. The positioning block 5 is used to determine the accurate profiling position of the steel bar. The pressing plate 6 is used to place the steel bar, which is movably connected to the lower fixed plate 8 by a countersunk screw. The countersunk screw can move up and down in the screw hole in the middle of the lower fixed plate 8 with the up and down movement of the return spring 10. The bending die 7 is fixed to the lower fixed plate 8 by a fastening bolt, and completes the bending operation together with the bending punch 4. Before processing, the steel bar 12 is fed between the upper and lower dies from one side by a feeding mechanism or manually, and presses against the inner side of the positioning block 5.

[0020] Working process of embodiment 1:

[0021] (1) Please refer to Figure 1 In the mold opening state, the φ6 steel bar 12 is pushed manually or automatically by the feeding mechanism until it hits the positioning block 5 to ensure the accurate processing position of the steel bar;

[0022] (2) Please refer to Figure 2, then start the punch press, the upper die moves downward, the punch 3 and the press plate 6 clamp the steel bar 12, and then the upper die continues to move downward to cut the φ6 steel bar 12;

[0023] (3) Please refer to Figure 2 The upper die continues to move downward, the bending punch 4 completes the bending operation, and the processed product 12' is discharged from the die through the blanking hole 11 below and enters the collection box (not shown) below.

[0024] (4) Under the action of the reset spring 10, the lower die is reset, the upper die moves up to the initial position, and the die returns to the open state.

[0025] Embodiment 2: A mold structure for cutting, bending, and integrally producing aluminum alloys. Other structures are similar to those of Embodiment 1, except that the cutting punch 3 is narrower than that of Embodiment 1. To avoid springback of the workpiece after processing, the bending punch 4 stays in the bending die 7 for 10 seconds longer than that of Embodiment 1 before the lower die is reset.

[0026] Example 3: Please refer to Figure 1 and Figure 4 , a mold structure for cutting, bending, and integrally producing titanium alloys. The other structures are similar to those of Example 1. Considering the high strength of titanium alloys, there are protective inserts 13 on the front and back of the outer side of the pressing plate 6. The inserts are square and fixed to the outer edge of the pressing plate 6 by screws to protect the outer edge of the pressing plate 6 (one side of the bending die 7), thereby extending the service life of the mold structure.

[0027] The U-shaped product 12' after the stamping operation is as follows Figure 3 shown.

[0028] Moreover, the term "comprise" or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus.

[0029] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary, but not restrictive, and the scope of the present invention is defined by the appended claims rather than the above explanations and descriptions, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. At the same time, any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A mold structure for cutting, bending and integrally producing metal strips, comprising an upper mold and a lower mold, wherein the upper mold comprises an upper mold base (1), an upper fixing plate (2) fixed below the upper mold base (1) by fasteners, a cutting punch (3) fixed below the upper fixing plate (2) by fasteners, and a bending punch (4) fixed below the upper mold base (1) by fasteners, wherein the lower mold comprises a pressing plate (6) opposite to the cutting punch (3), a bending die (7) opposite to the bending punch, a positioning stopper (5) fixed to the outside of the bending die (7), a lower fixing plate (8) located below the pressing plate (6) and the bending die (7), a lower mold base (9) fixed below the lower fixing plate (8) by fasteners, and a return spring (10) fixed between the pressing plate (6) and the lower mold base (9), wherein the positioning stopper (5) is fixed to the outside of the bending die (7), a lower fixing plate (8) located below the pressing plate (6) and the bending die (7), a lower mold base (9) fixed below the lower fixing plate (8) by fasteners, and a return spring (10) fixed between the pressing plate (6) and the lower mold base (9), wherein the positioning stopper (5) is fixed to the outside of the bending die (7), and the lower fixing plate (8) is fixed to the bottom of the lower fixing plate (8) by fasteners. A blanking hole (11) is provided between the lower fixing plate (8) and the lower die seat (9) and passes through the two. The blanking hole (11) is located directly below the bending die (7) and is used to discharge the product after bending. The pressing plate (6) is used to place the metal strip. The upper end opening of the bending die (7) is an arc-shaped opening.

2. The mold structure according to claim 1, characterized in that: The metal strip is one of steel bars, aluminum alloys and titanium alloys.

3. The mold structure according to claim 1, characterized in that: The bending punch (4) can be replaced according to the bending shape requirements of the product.

4. The mold structure according to claim 1, characterized in that: The fasteners include fastening bolts, countersunk screws, or a combination of the two.

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