Asymmetric U-shaped part forming die

Abstract

The asymmetric U-shaped part forming die comprises an upper die plate assembly, a lower die plate assembly and a male die, the male die is arranged on the upper die plate assembly, the asymmetric U-shaped part forming die further comprises a first female die assembly and a second female die assembly which are arranged on the lower die plate assembly in a swinging mode and arranged in a left-right spaced mode, and protruding parts are arranged on the first female die assembly and the second female die assembly. A forming cavity is formed between the first female die assembly and the second female die assembly. According to the asymmetric U-shaped part forming die, the first female die assembly and the second female die assembly which are spaced left and right are arranged on the lower die plate assembly in a swinging mode, the protruding parts are arranged on the first female die assembly and the second female die assembly, and when the first female die assembly and the second female die assembly swing in the direction close to each other, the protruding parts press the side edges of a workpiece; and the side edge of the workpiece is bent inwards, so that the workpiece is just vertical and is not bent when being overpressed and the side edge of the workpiece rebounds, the rebounding of the workpiece is counteracted, the workpiece is not deformed, and the angle and the size of the workpiece are not out of tolerance.

Description

Technical Field

[0001] The utility model relates to the technical field of forming dies, in particular to an asymmetric U-shaped part forming die. Background Art

[0002] like Figures 7-10 As shown, the working principle of the conventional asymmetric U-shaped forming die is as follows: the punch 111 of the die presses the workpiece 112 into the inner cavity 114 of the rigid die 113, and the workpiece 112 moves downward with the punch 111. The workpiece 112 enters the rigid die 113 and is extruded and formed. After the workpiece 112 is extruded to the limit, the punch 111 is driven back by the equipment, and the ejection block 115 is pushed out of the workpiece 112 by the lower ejection cylinder of the equipment, and the whole work is completed. This die has the following disadvantages: 1. After the workpiece 112 is formed, its side 116 will rebound, that is, the side 116 of the workpiece 112 will bend outward (such as Figure 10 1. The workpiece is too thick and easily gets stuck on the mold. If the workpiece is too thin, its side 116 will rebound severely, resulting in a low yield rate. 2. The punch 111 and the die 113 are both rigid structures. The mold must be used on a forming hydraulic press, otherwise the workpiece cannot be removed.

[0003] Therefore, further improvements are necessary. Utility Model Content

[0004] The purpose of the utility model is to provide an asymmetric U-shaped part forming die with simple structure, good product quality, high production efficiency, low cost and strong practicality, so as to overcome the shortcomings of the prior art.

[0005] An asymmetric U-shaped part forming die designed for this purpose includes an upper template assembly, a lower template assembly and a punch, the punch is arranged on the upper template assembly, and is characterized in that it also includes a first die assembly and a second die assembly that are swingably arranged on the lower template assembly and spaced apart from each other. The first die assembly and the second die assembly are provided with protrusions, and a forming cavity is formed between the first die assembly and the second die assembly; when the punch moves downward, the workpiece is pressed into the forming cavity, and the bottom of the workpiece is pressed on the first die assembly and the second die assembly respectively, so that the first die assembly and the second die assembly swing in a direction close to each other, thereby pressing the protrusions on the side of the workpiece to make the side of the workpiece bend inward.

[0006] The top material piece is arranged between the first recessed die assembly and the second recessed die assembly, and the elastic piece is arranged between the top material piece and the lower die plate assembly, and the top material piece partially extends into the forming cavity in the standby state; when the punch presses the workpiece into the forming cavity, the bottom of the workpiece presses the top material piece out of the forming cavity, and then the bottom of the workpiece is pressed on the first recessed die assembly and the second recessed die assembly respectively; when the punch is upwardly reset, the top material piece is upwardly moved and reset under the elastic force of the elastic piece to push the workpiece out and push the first recessed die assembly and the second recessed die assembly to swing and reset.

[0007] The first recessed die assembly comprises a long swing arm, and the second recessed die assembly comprises a short swing arm, the height of the long swing arm is higher than the height of the short swing arm, a first arc-shaped matching part is arranged between the long swing arm and the lower die plate assembly, the long swing arm is swingingly arranged on the lower die plate assembly through the first arc-shaped matching part, a second arc-shaped matching part is arranged between the short swing arm and the lower die plate assembly, and the short swing arm is swingingly arranged on the lower die plate assembly through the second arc-shaped matching part.

[0008] The first recessed die assembly further comprises a first recessed die block, and the second recessed die assembly further comprises a second recessed die block, the first recessed die block is arranged at the top of the long swing arm, the second recessed die block is arranged at the top of the short swing arm, and a protruding part is arranged on the first recessed die block and the second recessed die block.

[0009] A first swing part is arranged on the long swing arm, and a second swing part is arranged on the short swing arm, the first swing part and the second swing part are swingingly arranged on the lower die plate assembly.

[0010] The top material piece is arranged between the first swing part and the second swing part, first and second limiting parts are arranged on the two sides of the top material piece respectively, in the standby state, the first limiting part is upwardly arranged on the first swing part, and the second limiting part is upwardly arranged on the second swing part.

[0011] The height of the first recessed die block is higher than the height of the second recessed die assembly, the workpiece is obliquely arranged between the first recessed die assembly and the second recessed die assembly before forming, one end of the workpiece is supported on the first recessed die block, and the other end of the workpiece is supported on the short swing arm.

[0012] A positioning plate is arranged at the top of the lower die plate assembly, and the other end of the workpiece is arranged on the positioning plate.

[0013] A first positioning block is arranged on one side of the lower die plate assembly corresponding to the position of the first recessed die block, a second positioning block is arranged on one side of the lower die plate assembly corresponding to the position of the second recessed die block, and one side of the workpiece is arranged on the first positioning block and the second positioning block when the workpiece is obliquely arranged between the first recessed die assembly and the second recessed die assembly before forming.

[0014] The first forming part and the second forming part are respectively arranged on two sides of the bottom of the male die and are used for pressing on the workpiece, the first forming part and the second forming part are respectively arranged inwardly and obliquely, and the height of the first forming part is higher than that of the second forming part; the third forming part and the fourth forming part are respectively arranged on the bottom of the forming cavity, the third forming part is arranged correspondingly with the first forming part and is matched in shape, and the fourth forming part is arranged correspondingly with the second forming part and is matched in shape.

[0015] The asymmetric U-shaped part forming die of the utility model is characterized in that the first concave die assembly and the second concave die assembly are swingably arranged on the lower die plate assembly, the first concave die assembly and the second concave die assembly are provided with protruding parts, the protruding parts press on the side edges of the workpiece when the first concave die assembly and the second concave die assembly swing towards each other, so that the side edges of the workpiece are bent inwardly, the workpiece can be over-pressed, the side edges of the workpiece just become vertical and unbent when rebounding, thereby offsetting the rebound of the workpiece, the workpiece will not be deformed, the angle and size of the workpiece will not be out of tolerance, in addition, the die can be adjusted in stroke according to requirements to obtain the desired width size, the die has strong adaptability and has no limitation on the thickness of the workpiece, and the yield is improved, furthermore, the die uses springs and ejecting parts to eject the formed workpiece, so that the die can be used on an ordinary oil press without a lower ejecting cylinder, the equipment is more flexible, and the equipment cost is lower. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a sectional view of the forming die in an embodiment of the utility model.

[0017] Figure 2 It is a sectional view of the forming die in an embodiment of the utility model.

[0018] Figures 3-6 It is a schematic diagram of the forming process of the workpiece in an embodiment of the utility model.

[0019] Figures 7-10 It is a schematic diagram of the forming process of the traditional workpiece. DETAILED DESCRIPTION

[0020] The utility model will be further described below in combination with the drawings and embodiments.

[0021] Reference Figures 1-6The asymmetric U-shaped part forming die comprises an upper die plate assembly 1, a lower die plate assembly 2 and a punch 3, the punch 3 is arranged on the upper die plate assembly 1, further comprises a first concave die assembly and a second concave die assembly which are swing arranged on the lower die plate assembly 2 and are arranged at left and right intervals, the first concave die assembly and the second concave die assembly are provided with a protruding part 4, and a forming cavity 5 is formed between the first concave die assembly and the second concave die assembly; after the punch 3 contacts a workpiece 6 and moves downward, the punch 3 transmits force to the upper surface of the workpiece 6, the workpiece 6 is bent and deformed downward due to the force, the punch 3 continuously moves downward to press the workpiece 6 into the forming cavity 5, the bottom arc surface of the workpiece 6 is pressed on the first concave die assembly and the second concave die assembly respectively, thereby the first concave die assembly and the second concave die assembly are pushed to swing in the direction of approaching each other, thereby the protruding part 4 is pressed on the side edge 7 of the workpiece 6 to bend the side edge 7 of the workpiece 6 inward, the workpiece 6 is formed to a predetermined shape, then the side edge 7 of the workpiece 6 rebounds and finally becomes a vertical and unbent state; the workpiece 6 is a connecting plate.

[0022] Further comprises a material ejecting part 8 and an elastic part 9, the material ejecting part 8 is arranged between the first concave die assembly and the second concave die assembly, the elastic part 9 is arranged between the material ejecting part 8 and the lower die plate assembly 2, the material ejecting part 8 is a ejector pin, the elastic part 9 is a spring, and the material ejecting part 8 partially extends into the forming cavity 5 in the standby state; when the punch 3 presses the workpiece 6 into the forming cavity 5, the bottom arc surface of the workpiece 6 pushes the material ejecting part 8 to move downward to press the material ejecting part 8 out of the forming cavity 5, then the bottom arc surface of the workpiece 6 is pressed on the first concave die assembly and the second concave die assembly respectively; after the forming action of the workpiece 6 is completed, the punch 3 is driven back by the equipment, when the punch 3 moves upward, the material ejecting part 8 moves upward and resets under the elastic force of the elastic part 9 to eject the workpiece 6 and push the first concave die assembly and the second concave die assembly to return to the original position, thus the whole working process is completed.

[0023] The first concave die assembly comprises a long swing arm 10, the second concave die assembly comprises a short swing arm 11, the height of the long swing arm 10 is higher than the height of the short swing arm 11, a first arc-shaped matching part 12 is arranged between the long swing arm 10 and the lower die plate assembly 2, the long swing arm 10 is swing arranged on the lower die plate assembly 2 through the first arc-shaped matching part 12, the first arc-shaped matching part 12 comprises arc-shaped matching surfaces arranged on the long swing arm 10 and a fixed seat 27 respectively, a second arc-shaped matching part 13 is arranged between the short swing arm 11 and the lower die plate assembly 2, the short swing arm 11 is swing arranged on the lower die plate assembly 2 through the second arc-shaped matching part 13, and the second arc-shaped matching part 13 comprises arc-shaped matching surfaces arranged on the short swing arm 11 and the fixed seat 27 respectively; the long swing arm 10 and the short swing arm 11 are eccentric plate blocks.

[0024] The first recess die assembly further comprises a first recess die block 14, and the second recess die assembly further comprises a second recess die block 15, the first recess die block 14 is arranged at the top of the long swing arm 10, the second recess die block 15 is arranged at the top of the short swing arm 11, and the first recess die block 14 and the second recess die block 15 are provided with the protruding part 4.

[0025] The long swing arm 10 is provided with a first swing part 16, and the short swing arm 11 is provided with a second swing part 17, the first swing part 16 and the second swing part 17 are arranged in suspension on the lower die plate assembly 2, so that the long swing arm 10 and the short swing arm 11 have a swing space.

[0026] The material lifting piece 8 is arranged between the first swing part 16 and the second swing part 17, the material lifting piece 8 is provided with a first limiting part 18 and a second limiting part 19 on both sides, respectively, in the standby state, the first limiting part 18 is upwardly abutted on the first swing part 16, and the second limiting part 19 is upwardly abutted on the second swing part 17; when the material lifting piece 8 is upwardly moved and reset, the first limiting part 18 pushes the first swing part 16, and the second limiting part 19 pushes the second swing part 17, so that the first recess die assembly and the second recess die assembly return to the original position.

[0027] The height of the first recess die block 14 is higher than the height of the second recess die assembly (i.e. the short swing arm 11 and the second recess die block 15), the workpiece 6 is placed in an inclination between the first recess die assembly and the second recess die assembly before forming, one end of the workpiece 6 is supported on the first recess die block 14, and the other end of the workpiece 6 is supported on the short swing arm 11.

[0028] The lower die plate assembly 2 is provided with a positioning plate 20 at the top, and the other end of the workpiece 6 is abutted on the positioning plate 20, so as to prevent the workpiece 6 from sliding downwardly due to the inclination.

[0029] One side of the lower die plate assembly 2 is provided with a first positioning block 21 corresponding to the position of the first recess die block 14, and one side of the lower die plate assembly 2 is provided with a second positioning block 22 corresponding to the position of the second recess die block 15, when the workpiece 6 is placed in an inclination between the first recess die assembly and the second recess die assembly before forming, one side of the workpiece 6 is abutted on the first positioning block 21 and the second positioning block 22, so as to position the workpiece 6 and ensure that the workpiece 6 can be placed in the correct position; the first positioning block 21 is a long positioning block, and the second positioning block 22 is a short positioning block.

[0030] The first forming part 23 and the second forming part 24 are respectively arranged on the two sides of the bottom of the punch 3 and are used for pressing on the workpiece 6, the first forming part 23 and the second forming part 24 are respectively arranged inwards and are inclined, the height of the first forming part 23 is higher than the height of the second forming part 24; the third forming part 25 and the fourth forming part 26 are respectively arranged on the bottom of the forming cavity 5, the third forming part 25 is arranged in correspondence with the first forming part 23 and is matched in shape, the fourth forming part 26 is arranged in correspondence with the second forming part 24 and is matched in shape; the third forming part 25 is arranged on the long swing arm 10, and the fourth forming part 26 is arranged on the short swing arm 11; after the workpiece 6 presses the ejector 8 downwards and out of the forming cavity 5, the bottom arc surface of the workpiece 6 is respectively pressed on the third forming part 25 and the fourth forming part 26, thereby driving the first die assembly and the second die assembly to swing in the direction of approaching each other.

[0031] The upper die plate assembly 1 comprises an upper die plate 28 and an upper die cushion plate 29, the upper die plate 28 is fixed on the oil press, the upper die cushion plate 29 is fixed on the bottom of the upper die plate 28, and the punch 3 is fixed on the bottom of the upper die cushion plate 29; the lower die plate assembly 2 comprises a lower die plate 30, a fixed seat 27 and a fixed frame 31, the lower die plate 30 is fixed on the oil press, the fixed seat 27 is fixed on the lower die plate 30, the fixed frame 31 is fixed on the top of the fixed seat 27, the long swing arm 10 and the short swing arm 11 are swingably arranged in the fixed seat 27, the first mounting position 32 and the second mounting position 33 are arranged in the fixed seat 27, the ejector 8 is movably mounted on the first mounting position 32, and the elastic member 9 is mounted on the second mounting position 33; the first positioning block 21 and the second positioning block 22 are fixed on one side of the fixed frame 31, and the positioning plate 20 is fixed on one side of the top of the fixed seat 27.

[0032] The above is the preferred scheme of the utility model, the basic principle, the main features and the advantages of the utility model are displayed and described, and those skilled in the art should understand that the utility model is not limited by the above examples, the above examples and the description in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed for protection. The protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An asymmetric U-formation molding die comprising an upper die plate assembly (1), a lower die plate assembly (2) and a punch (3) provided on the upper die plate assembly (1), characterized in that: The first and second concave die assemblies are arranged on the lower die plate assembly (2) and are arranged at intervals left and right, and the first and second concave die assemblies are provided with protrusions (4), and a forming cavity (5) is formed between the first and second concave die assemblies; when the punch (3) moves downward, the workpiece (6) is pressed into the forming cavity (5), and the bottom of the workpiece (6) is pressed on the first and second concave die assemblies respectively, so that the first and second concave die assemblies swing in the direction of approaching each other, and then the protrusions (4) are pressed on the side edges (7) of the workpiece (6), so that the side edges (7) of the workpiece (6) are bent inward.

2. The asymmetric U-former molding die of claim 1, wherein: The material ejecting piece (8) is arranged between the first and second concave die assemblies, and the elastic piece (9) is arranged between the material ejecting piece (8) and the lower die plate assembly (2), and the material ejecting piece (8) partially extends into the forming cavity (5) in the standby state; when the punch (3) presses the workpiece (6) into the forming cavity (5), the bottom of the workpiece (6) presses the material ejecting piece (8) out of the forming cavity (5), and then the bottom of the workpiece (6) is pressed on the first and second concave die assemblies respectively; when the punch (3) returns upward, the material ejecting piece (8) moves upward and resets under the elastic force of the elastic piece (9), so as to eject the workpiece (6) and drive the first and second concave die assemblies to swing and reset.

3. The asymmetric U-former molding die of claim 2, wherein: The first concave die assembly comprises a long swing arm (10), and the second concave die assembly comprises a short swing arm (11), the height of the long swing arm (10) is higher than the height of the short swing arm (11), a first arc-shaped matching part (12) is arranged between the long swing arm (10) and the lower die plate assembly (2), the long swing arm (10) is swingingly arranged on the lower die plate assembly (2) through the first arc-shaped matching part (12), and a second arc-shaped matching part (13) is arranged between the short swing arm (11) and the lower die plate assembly (2), the short swing arm (11) is swingingly arranged on the lower die plate assembly (2) through the second arc-shaped matching part (13).

4. The asymmetric U-former molding die of claim 3, wherein: The first concave die assembly further comprises a first concave die block (14), and the second concave die assembly further comprises a second concave die block (15), the first concave die block (14) is arranged at the top of the long swing arm (10), the second concave die block (15) is arranged at the top of the short swing arm (11), and the first and second concave die blocks (14) and (15) are provided with protrusions (4).

5. The asymmetric U-former molding die of claim 4, wherein: The first swing part (16) is arranged on the long swing arm (10), and the second swing part (17) is arranged on the short swing arm (11), and the first and second swing parts (16) and (17) are suspended on the lower die plate assembly (2).

6. The asymmetric U-former molding die of claim 5, wherein: The material ejecting piece (8) is arranged between the first and second swing parts (16) and (17), and the two sides of the material ejecting piece (8) are respectively provided with a first limiting part (18) and a second limiting part (19), and in the standby state, the first limiting part (18) is upwardly abutted on the first swing part (16), and the second limiting part (19) is upwardly abutted on the second swing part (17).

7. The asymmetric U-former molding die of claim 4, wherein: The height of the first concave die module (14) is higher than the height of the second concave die module, the workpiece (6) is placed obliquely between the first concave die module and the second concave die module before forming, one end of the workpiece (6) is supported on the first concave die module (14), and the other end of the workpiece (6) is supported on the short swing arm (11).

8. The asymmetric U-former molding die of claim 7, wherein: The lower die plate assembly (2) is provided with a positioning plate (20) at the top, and the other end of the workpiece (6) abuts against the positioning plate (20).

9. The asymmetric U-former molding die of claim 8, wherein: The lower die plate assembly (2) is provided with a first positioning block (21) corresponding to the position of the first concave die module (14) on one side, and is provided with a second positioning block (22) corresponding to the position of the second concave die module (15) on one side, and when the workpiece (6) is placed obliquely between the first concave die module and the second concave die module before forming, one side of the workpiece (6) abuts against the first positioning block (21) and the second positioning block (22).

10. A forming die for asymmetric U-shaped pieces according to any one of claims 1-9, characterized in that: The first forming part (23) and the second forming part (24) are respectively provided on both sides of the bottom of the male die (3) and are used for pressing on the workpiece (6), the first forming part (23) and the second forming part (24) are respectively provided inwardly and obliquely, the height of the first forming part (23) is higher than the height of the second forming part (24); the bottom of the forming cavity (5) is respectively provided with a third forming part (25) and a fourth forming part (26), the third forming part (25) is correspondingly arranged with the first forming part (23) and is matched in shape, and the fourth forming part (26) is correspondingly arranged with the second forming part (24) and is matched in shape.

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