Step type stretching part flaring forming die

Abstract

The utility model discloses a flaring forming die for a step stretching piece, which comprises an upper die assembly and a lower die assembly, the upper die assembly comprises an upper die plate, an upper base plate, an upper fixing plate, a flaring male die and a forming male die; the lower die assembly comprises a lower die plate, a lower base plate, a lower fixing plate and a flaring positioning male die. And the flaring female die mechanism and the forming female die mechanism are arranged on the flaring female die mechanism. The compound die is compact in structure, a one-process multi-process compound die is designed according to the structure of a workpiece, flaring and forming processes are completed through one stroke of a press machine, the compound die is simple in product placing and taking, convenient and fast to operate and stable in product quality, and cost reduction and efficiency improvement are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping, in particular to a flaring and forming die and a processing method for a stepped drawing part. Background Art

[0002] For the existing stepped drawing part, it is necessary to flare and flange the small end face, and the flatness requirement of the flange at the flared part of the mouth is high. At the same time, the cylindricity of the unflanged area also needs to be ensured. In addition, since the stepped drawing part needs to flare and flange the small end, the flaring and flanging female dies need to be divided into two parts, which makes the operation more troublesome. According to the existing technology, the two steps of flaring and flanging are operated by two people respectively, and each die is equipped with a separate press, resulting in low efficiency and high cost. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a flaring and forming die for a stepped drawing part, which can overcome the problems of troublesome operation, numerous processes and low efficiency in the flaring and flanging of the small end face of the stepped drawing part.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A flaring and forming die for a stepped drawing part, which is used for simultaneously performing flaring and forming processes, includes an upper die assembly and a lower die assembly. The upper die assembly includes an upper template, an upper backing plate and an upper fixing plate which are sequentially connected from top to bottom; a flaring punch and a forming punch are arranged at the bottom of the upper fixing plate; the lower die assembly includes a lower template, a lower die backing plate and a lower fixing plate which are sequentially connected from bottom to top; a detachable flaring positioning punch and a forming punch positioning are arranged on the lower fixing plate for respectively placing workpieces to be processed, and the flaring positioning punch and the forming punch positioning are respectively located directly below the flaring punch and the forming punch; an openable and closable flaring female die mechanism and an openable and closable forming female die mechanism are arranged on the lower fixing plate, the flaring positioning punch is arranged between the openable and closable flaring female die mechanism, and the forming punch positioning is arranged between the openable and closable forming female die mechanism; notches matching the shape of the workpiece are arranged on the flaring female die mechanism and the forming female die mechanism for fully fitting with the workpiece when closed.

[0006] Preferably, the flaring female die mechanism includes a first upper pressing block and a third upper pressing block arranged on the upper fixing plate, and a first flaring female die and a second flaring female die arranged on the lower fixing plate; the flaring male die is located between the first upper pressing block and the third upper pressing block, and the flaring positioning male die is located between the first flaring female die and the second flaring female die; the bottom of the first upper pressing block adopts a chamfered structure, and the outer sides of the first flaring female die and the second flaring female die are both provided with chamfered structures, and the chamfered structure of the first upper pressing block matches the chamfered structure of the first flaring female die; the bottom of the third upper pressing block adopts an inverted triangular structure, and one side of the inverted triangular structure of the third upper pressing block matches the chamfered structure of the second flaring female die; by respectively pressing the chamfered structures of the first flaring female die and the second flaring female die through the chamfered structure of the first upper pressing block and one side of the inverted triangular structure of the third upper pressing block, the first flaring female die and the second flaring female die are displaced towards the flaring positioning male die, realizing approaching each other.

[0007] Preferably, the forming female die mechanism includes a second upper pressing block arranged on the upper fixing plate, and a first forming female die and a second forming female die arranged on the lower fixing plate; the second pressing block is arranged on the side of the third upper pressing block away from the first upper pressing block, the forming male die is located between the second upper pressing block and the third upper pressing block, and the forming positioning male die is located between the first forming female die and the second forming female die; the bottom of the second upper pressing block adopts a chamfered structure, and the outer sides of the first forming female die and the second forming female die are both provided with chamfered structures, and the chamfered structure of the second upper pressing block matches the chamfered structure of the first forming female die; the bottom of the third upper pressing block adopts an inverted triangular structure, and the other side of the inverted triangular structure of the third upper pressing block matches the chamfered structure of the second forming female die; by respectively pressing the chamfered structures of the first forming female die and the second forming female die through the chamfered structure of the second upper pressing block and one side of the inverted triangular structure of the third upper pressing block, the first forming female die and the second forming female die are displaced towards the forming positioning male die, realizing approaching each other.

[0008] Preferably, the flaring female die mechanism further includes a second return spring, and the second return spring is arranged between the first flaring female die and the second flaring female die for resetting the distance between the second flaring female die and the flaring male die; the forming female die mechanism further includes a fourth return spring, and the second return spring is arranged between the first forming female die and the second forming female die for resetting the distance between the second forming female die and the forming male die.

[0009] Preferably, a limiting and resetting mechanism is respectively arranged on one side of the flaring female die away from the second flaring female die and on one side of the forming female die away from the second forming female die. The limiting and resetting mechanism comprises a stop block, a reset spring and a connecting shaft. The reset spring is sleeved outside the connecting shaft in a limited manner. The end of the connecting shaft is sequentially connected to the stop block and the first flaring female die or the first forming female die, and is respectively used for resetting the distance between the first flaring female die and the flaring male die and for resetting the distance between the first forming female die and the forming male die.

[0010] Preferably, a pressure measuring block assembly is arranged on the lower fixing plate. The pressure measuring block assembly comprises a first side pressure block and a second side pressure block. A keyway is formed by the parallel arrangement of the first side pressure block and the second side pressure block. The flaring female die mechanism and the forming female die mechanism are slidably arranged in the keyway formed by the first side pressure block and the second side pressure block on the lower fixing plate.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] According to the structure of the workpiece, the utility model designs a compound die with multiple processes in one step, and completes the flaring and forming processes through one stroke of the press. The structure of the utility model is simple for placing and taking products, convenient to operate, and the product quality is stable, realizing cost reduction and efficiency improvement. The die structure of the utility model is compact, completes the flaring and forming processes through one stroke, reduces the original complex processes, is simple to operate, has stable product quality, and greatly improves the production efficiency. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of a stepped drawing part flaring and forming die provided by an embodiment of the utility model;

[0014] Figure 2 is Figure 1 a schematic structural diagram of the first set of water supply control system in;

[0015] Figure 3 is Figure 1 a schematic structural diagram of the second set of water supply control system in;

[0016] Figure 4 is Figure 1 a schematic structural diagram of the third set of water supply control system in;

[0017] Figure 5 is a schematic diagram of the use state of the utility model.

[0018] Figure 6 is a schematic structural diagram of the workpiece.

[0019] The serial numbers in the figure are as follows:

[0020] 1-1. Upper template; 1-2. Upper backing plate; 1-3. Upper fixing plate; 1-4. Flaring punch; 1-5. Forming punch; 2-1. Lower template; 2-2. Lower backing plate; 2-3. Lower fixing plate; 2-4. Flaring positioning punch; 2-5. Forming positioning punch; 3. First upper pressure block; 3-1. Third upper pressure block; 3-2. First flaring die; 3-3. Second flaring die; 3-4. First stop block; 3-5. First return spring; 3-6. Second return spring; 3-7. Second upper pressure block; 3-8. First forming die; 3-9. Second forming die; 3-10. Second stop block; 3-11. Third return spring; 3-12. Pressure measuring block assembly; 3-12-1. First side pressure block; 3-12-2. Second side pressure block; 3-13. Fourth return spring; 4. Workpiece. Detailed implementation mode

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0022] As Figures 1 to 6 shown, a stepped stretching part flaring and forming die disclosed by the present invention is used for simultaneously performing flaring and forming processes, and includes an upper die assembly 1 and a lower die assembly 2.

[0023] The upper die assembly 1 includes, from top to bottom, an upper template 1-1, an upper backing plate 1-2, and an upper fixing plate 1-3 that are sequentially connected; a flaring punch 1-4 and a forming punch 1-5 are provided at the bottom of the upper fixing plate 1-3.

[0024] The lower die assembly 2 includes, from bottom to top, a lower template 2-1, a lower die backing plate 2-2, and a lower fixing plate 2-3 that are sequentially connected; a detachable flaring positioning punch 2-4 and a forming positioning punch 2-5 are provided on the lower fixing plate 2-3 for respectively placing the workpiece 4 to be processed, and the flaring positioning punch 2-4 and the forming positioning punch 2-5 are respectively located directly below the flaring punch 1-4 and the forming punch 1-5.

[0025] An openable and closable flaring die mechanism and an openable and closable forming die mechanism are provided on the lower fixing plate 2-3. The flaring positioning punch 2-4 is arranged between the openable and closable flaring die mechanisms, and the forming positioning punch 2-5 is arranged between the openable and closable forming die mechanisms; notches matching the shape of the workpiece 4 are provided on the flaring die mechanism and the forming die mechanism for fully fitting with the workpiece 4 when closed.

[0026] The flaring female die mechanism includes the first upper pressure block 3 arranged on the upper fixing plate 1-3 and the third upper pressure block 3-1, and the first flaring female die 3-2 and the second flaring female die 3-3 arranged on the lower fixing plate 2-3. The flaring male die 1-4 is located between the first upper pressure block 3 and the third upper pressure block 3-1, and the flaring positioning male die 2-4 is located between the first flaring female die 3-2 and the second flaring female die 3-3; the bottom of the first upper pressure block 3 adopts a chamfered structure, and chamfered structures are provided on the outer sides of both the first flaring female die 3-2 and the second flaring female die 3-3, and the chamfered structure of the first upper pressure block 3 matches the chamfered structure of the first flaring female die 3-2;

[0027] The bottom of the third upper pressure block 3-1 all adopts an inverted triangle structure, and one side of the inverted triangle structure of the third upper pressure block 3-1 matches the chamfered structure of the second flaring female die 3-3. By respectively squeezing the chamfered structures of the first flaring female die 3-2 and the second flaring female die 3-3 through the chamfered structure of the first upper pressure block 3 and one side of the inverted triangle structure of the third upper pressure block 3-1, the first flaring female die 3-2 and the second flaring female die 3-3 are displaced in the direction of the flaring positioning male die 2-4, realizing approaching each other.

[0028] The forming female die mechanism includes the second upper pressure block 3-7 arranged on the upper fixing plate 1-3, and the first forming female die 3-8 and the second forming female die 3-9 arranged on the lower fixing plate 2-3. The second pressure block 3-7 is arranged on the side of the third upper pressure block 3-1 away from the first upper pressure block 3. The forming male die 1-5 is located between the second upper pressure block 3-7 and the third upper pressure block 3-1, and the forming positioning male die 2-5 is located between the first forming female die 3-8 and the second forming female die 3-9. The bottom of the second upper pressure block 3-7 adopts a chamfered structure, and chamfered structures are provided on the outer sides of both the first forming female die 3-8 and the second forming female die 3-9, and the chamfered structure of the second upper pressure block 3-7 matches the chamfered structure of the first forming female die 3-8. The bottom of the third upper pressure block 3-1 all adopts an inverted triangle structure, and the other side of the inverted triangle structure of the third upper pressure block 3-1 matches the chamfered structure of the second forming female die 3-9. By respectively squeezing the chamfered structures of the first forming female die 3-8 and the second forming female die 3-9 through the chamfered structure of the second upper pressure block 3-7 and one side of the inverted triangle structure of the third upper pressure block 3-1, the first forming female die 3-8 and the second forming female die 3-9 are displaced in the direction of the forming positioning male die 2-5, realizing approaching each other.

[0029] Furthermore, in order to improve production efficiency, in this embodiment, the flaring female die mechanism further includes a second return spring 3-6. The second return spring 3-6 is arranged between the first flaring female die 3-2 and the second flaring female die 3-3, and is used to reset the distance between the second flaring female die 3-3 and the flaring male die 1-4.

[0030] On one side of the flaring female die 3-2 away from the flaring female die 3-3, a flaring limit and reset mechanism is provided. The flaring limit and reset mechanism includes a first stop block 3-4, a first return spring 3-5, and a first connecting shaft. The first return spring 3-5 is sleeved outside the first connecting shaft in a limited manner, and its end is sequentially connected to the first stop block 3-4 and the flaring female die 3-2. The first stop block 3-4 squeezes the first return spring 3-5 along the first connecting shaft, so as to reset the distance between the flaring female die 3-2 and the flaring male die 1-4.

[0031] The forming female die mechanism further includes a fourth return spring 3-13. The second return spring 3-6 is arranged between the first forming female die 3-8 and the second forming female die 3-9, so as to reset the distance between the second forming female die 3-9 and the forming male die 1-5.

[0032] On one side of the first forming female die 3-8 away from the second forming female die 3-9, a forming limit and reset mechanism is provided. The forming limit and reset mechanism includes a second stop block 3-10, a third return spring 3-11, and a second connecting shaft. The second return spring 3-11 is sleeved outside the second connecting shaft in a limited manner, and its end is sequentially connected to the second stop block 3-10 and the first forming female die 3-8. The second stop block 3-10 squeezes the second return spring 3-11 along the second connecting shaft, so as to reset the distance between the first forming female die 3-8 and the forming male die 1-5.

[0033] Further, in this embodiment, a keyway formed by a first side pressing block 3-12-1 and a second side pressing block 3-12-2 is provided on the lower fixing plate 2-3. The flaring female die mechanism and the forming female die mechanism are slidably arranged in the keyway formed by the first side pressing block 3-12-1 and the second side pressing block 3-12-2 on the lower fixing plate 2-3.

[0034] The working principle of this embodiment is as follows:

[0035] First, install this embodiment on a press, place the workpiece 4 to be flared into the flaring positioning male die 2-4, start the stamping button, and the slider of the press moves downward. The upper pressing block 3, the second upper pressing block 3-7, and the third upper pressing block 3-1 move downward simultaneously.

[0036] The upper pressing block 3, the second upper pressing block 3-7, and the third upper pressing block 3-1 simultaneously squeeze the flaring female die 3-2, the flaring female die 3-3, the first forming female die 3-8, and the second forming female die 3-9 downward, and make them slide in the keyway formed by the first side pressing block 3-12-1 and the second side pressing block 3-12-2 on the lower fixing plate 2-3.

[0037] When the guiding parts of the bottom chamfer structures or inverted triangular structures of the three upper pressing blocks (upper pressing block 3, upper pressing block two 3-7, upper pressing block three 3-1) are all introduced into the cut corners of the flaring female die one 3-2, flaring female die two 3-3, forming female die one 3-8, and forming female die two 3-9, when the vertical surfaces of the three upper pressing blocks contact the vertical surfaces of the female die, the flaring female die one 3-2 and the flaring female die two 3-3 move towards each other until they merge in the direction of the workpiece 4 placed on the flaring positioning punch 2-4. The notches on the flaring female die one 3-2 and the flaring female die two 3-3 merge with the workpiece 4 placed on the flaring positioning punch 2-4. At the same time, the forming female die one 3-8 and the forming female die two 3-9 also merge in the same working principle as the flaring female die one 3-2 and the flaring female die two 3-3. The four groups of return springs (return spring one 3-5, return spring two 3-6, return spring three 3-11, return spring four 3-13) are compressed simultaneously, and the flaring punch 1-4 precisely flares the workpiece to complete one stamping process.

[0038] Subsequently, the press moves upward, driving the three upper pressing blocks to move upward simultaneously. Under the action of the four groups of return springs, the flaring female die one 3-2 and the flaring female die two 3-3 return in opposite directions, and the forming female die one 3-8 and the forming female die two 3-9 return in opposite directions.

[0039] Then, take out the workpiece 4 on the flaring positioning punch 2-4 and place it into the forming positioning punch 2-5. Put a new workpiece 4 to be flared into the flaring positioning punch 2-4, and press the stamping button again to realize the synchronous flaring and forming of the workpiece by the flaring punch 1-4 and the forming punch 1-5. The press completes the flaring and forming processes in one stroke.

[0040] The utility model designs a compound die with multiple processes in one sequence according to the structure of the workpiece, and completes the flaring and forming processes through one stroke of the press. This structure is simple for placing and taking products, convenient to operate, has stable product quality, and realizes cost reduction and efficiency improvement. The die structure of the utility model is compact, completes the flaring and forming processes through one stroke, reduces the original complex processes, is simple to operate, has stable product quality, and greatly improves the production efficiency.

[0041] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0042] Furthermore, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined.

[0043] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present utility model.

Claims

1. A stepped stretching part flaring and forming die, which is used for simultaneously performing the flaring and forming processes, and includes an upper die assembly (1) and a lower die assembly (2), and is characterized in that: The upper die assembly (1) includes, from top to bottom, an upper template (1-1), an upper backing plate (1-2) and an upper fixing plate (1-3) which are sequentially connected; a flaring punch (1-4) and a forming punch (1-5) are provided at the bottom of the upper fixing plate (1-3); The lower die assembly (2) includes, from bottom to top, a lower template (2-1), a lower die backing plate (2-2) and a lower fixing plate (2-3) which are sequentially connected; a detachable flaring positioning punch (2-4) and a forming positioning punch (2-5) are provided on the lower fixing plate (2-3) for respectively placing workpieces (4) to be processed, and the flaring positioning punch (2-4) and the forming positioning punch (2-5) are respectively located directly below the flaring punch (1-4) and the forming punch (1-5); An openable and closable flaring female die mechanism and an openable and closable forming female die mechanism are provided on the lower fixing plate (2-3), the flaring positioning punch (2-4) is arranged between the openable and closable flaring female die mechanisms, and the forming positioning punch (2-5) is arranged between the openable and closable forming female die mechanisms; notches matching the shape of the workpiece (4) are provided on the flaring female die mechanism and the forming female die mechanism for fully fitting with the workpiece (4) when closed.

2. The stepped stretching part flaring and forming die according to claim 1, wherein: The flaring female die mechanism includes an upper pressing block one (3) and an upper pressing block three (3-1) provided on the upper fixing plate (1-3), and a flaring female die one (3-2) and a flaring female die two (3-3) provided on the lower fixing plate (2-3); The flaring punch (1-4) is located between the upper pressing block one (3) and the upper pressing block three (3-1), and the flaring positioning punch (2-4) is located between the flaring female die one (3-2) and the flaring female die two (3-3); The bottom of the upper pressing block one (3) adopts a chamfered structure, and chamfered structures are provided on the outer sides of the flaring female die one (3-2) and the flaring female die two (3-3), and the chamfered structure of the upper pressing block one (3) matches the chamfered structure of the flaring female die one (3-2); The bottom of the upper pressing block three (3-1) all adopts an inverted triangle structure, and one side of the inverted triangle structure of the upper pressing block three (3-1) matches the chamfered structure of the flaring female die two (3-3); By respectively squeezing the chamfered structures of the flaring female die one (3-2) and the flaring female die two (3-3) through the chamfered structure of the upper pressing block one (3) and one side of the inverted triangle structure of the upper pressing block three (3-1), the flaring female die one (3-2) and the flaring female die two (3-3) are displaced towards the flaring positioning punch (2-4) to achieve approaching each other.

3. The stepped stretching part flaring and forming die according to claim 2, wherein: The forming female die mechanism includes a second upper pressing block (3-7) arranged on the upper fixing plate (1-3), and a first forming female die (3-8) and a second forming female die (3-9) arranged on the lower fixing plate (2-3); The second pressing block (3-7) is arranged on the side of the third upper pressing block (3-1) away from the first upper pressing block (3). The forming male die (1-5) is located between the second upper pressing block (3-7) and the third upper pressing block (3-1). The forming positioning male die (2-5) is located between the first forming female die (3-8) and the second forming female die (3-9); The bottom of the second upper pressing block (3-7) adopts a chamfered structure. The outer sides of the first forming female die (3-8) and the second forming female die (3-9) are both provided with cut-off corner structures. The chamfered structure of the second upper pressing block (3-7) matches the cut-off corner structure of the first forming female die (3-8); The bottom of the third upper pressing block (3-1) all adopts an inverted triangle structure. The other side of the inverted triangle structure of the third upper pressing block (3-1) matches the cut-off corner structure of the second forming female die (3-9); By respectively extruding the cut-off corner structures of the first forming female die (3-8) and the second forming female die (3-9) through the chamfered structure of the second upper pressing block (3-7) and one side of the inverted triangle structure of the third upper pressing block (3-1), the first forming female die (3-8) and the second forming female die (3-9) are displaced towards the forming positioning male die (2-5), realizing approaching each other.

4. The stepped drawing part flaring forming die according to claim 3, characterized in that: The flaring female die mechanism further includes a second reset spring (3-6). The second reset spring (3-6) is arranged between the first flaring female die (3-2) and the second flaring female die (3-3) and is used to reset the distance between the second flaring female die (3-3) and the flaring male die (1-4); The forming female die mechanism further includes a fourth reset spring (3-13). The second reset spring (3-6) is arranged between the first forming female die (3-8) and the second forming female die (3-9) and is used to reset the distance between the second forming female die (3-9) and the forming male die (1-5).

5. The stepped drawing part flaring forming die according to claim 3, characterized in that: On one side of the first flaring female die (3-2) away from the second flaring female die (3-3) and on one side of the first forming female die (3-8) away from the second forming female die (3-9), a limit and reset mechanism is respectively arranged. The limit and reset mechanism includes a stop block, a reset spring and a connecting shaft; The reset spring is sleeved outside the connecting shaft in a limited way. The end of the connecting shaft is sequentially connected to the stop block and the first flaring female die (3-2) or the first forming female die (3-8), and is respectively used to reset the distance between the first flaring female die (3-2) and the flaring male die (1-4) and to reset the distance between the first forming female die (3-8) and the forming male die (1-5).

6. The flaring forming die for a stepped tensile part according to claim 1, characterized in that: A pressure measuring block assembly (3-12) is provided on the lower fixing plate (2-3). The pressure measuring block assembly (3-12) includes a first side pressure block (3-12-1) and a second side pressure block (3-12-2). A keyway is formed by the first side pressure block (3-12-1) and the second side pressure block (3-12-2) which are parallel to each other. The flaring female die mechanism and the forming female die mechanism are slidably arranged in the keyway formed by the first side pressure block (3-12-1) and the second side pressure block (3-12-2) on the lower fixing plate (2-3).

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