Vertical pipe double-side hole expanding die

Abstract

The utility model discloses a double-side hole expanding die for a vertical pipe. The double-side hole expanding die is characterized by comprising a lower die, an upper die, a left side die and a right side die, a first lower semicircular die hole and a second lower semicircular die hole are formed in the upper surface of the lower die; a first upper semicircular die hole and a second upper semicircular die hole are formed in the lower surface of the upper die; a first left male die and a second left male die are arranged on the right side of the left side die; a first right male die and a second right male die are arranged on the left side of the right side die; the positions of the first upper semicircular die hole and the first lower semicircular die hole correspond to each other up and down; the positions of the second upper semicircular die hole and the second lower semicircular die hole correspond to each other up and down; the first left male die, the first lower semicircular die hole and the first right male die are concentrically arranged; and the second left male die, the second lower semicircular die hole and the second right male die are concentrically arranged. The vertical pipe double-side expansion hole forming device can achieve double-side expansion hole forming of a vertical pipe at a time, stamping deformation is small, the technology is more reasonable, and the product percent of pass is high.

Description

Technical Field

[0001] The utility model relates to a vertical pipe double-sided expansion hole die. Background Art

[0002] There is a kind of stand pipe, which is a motorcycle accessory, and one end of the stand pipe has a first connection hole N-1 with an enlarged inner diameter and the other end has a second connection hole N-2 with an enlarged inner diameter. The stand pipe is obtained by conventional machining (i.e., machining the inner and outer holes by turning a round tube), which has the problems of large cutting amount, long time consumption (5-10 minutes / piece), much material waste and high cost. Utility Model Content

[0003] The utility model provides a vertical tube double-sided expansion hole die, which solves the problems of large cutting amount, long time consumption (5-10 minutes / piece) and much material waste in conventional machining of the existing vertical tube (i.e. machining inner and outer holes by round tube turning).

[0004] In order to achieve the above-mentioned purpose, the scheme of the utility model is: a vertical tube double-sided expansion hole mold, characterized in that: it includes a lower mold, an upper mold, a left mold and a right mold; the upper surface of the lower mold is provided with a first lower semicircular mold hole and a second lower semicircular mold hole; the lower surface of the upper mold is provided with a first upper semicircular mold hole and a second upper semicircular mold hole; the right side of the left mold is provided with a first left punch and a second left punch; the left side of the right mold is provided with a first right punch and a second right punch; the first upper semicircular mold hole and the first lower semicircular mold hole are located in correspondence with each other up and down; the second upper semicircular mold hole and the second lower semicircular mold hole are located in correspondence with each other up and down; the first left punch, the first lower semicircular mold hole and the first right punch are concentrically arranged; the second left punch, the second lower semicircular mold hole and the second right punch are concentrically arranged.

[0005] Furthermore, the first lower semicircular die hole and the first upper semicircular die hole both include a first left-end formed semicircular hole segment, a first middle clamped semicircular hole segment and a first right-end formed semicircular hole segment; the second lower semicircular die hole and the second upper semicircular die hole both include a second left-end formed semicircular hole segment, a second middle clamped semicircular hole segment and a second right-end formed semicircular hole segment.

[0006] Furthermore, the first left punch and the second left punch can be detachably fixed on the left side mold.

[0007] Furthermore, the first right punch and the second right punch can be detachably fixed on the right side mold.

[0008] Furthermore, the lower die, upper die, left die and / or right die are made of Cr12MoV material.

[0009] Furthermore, the first left punch, the second left punch, the first right punch and / or the second right punch) are made of Cr12MoV material.

[0010] Furthermore, the upper die is provided with a guide column; and the lower die is provided with a guide hole for sliding fit of the guide column.

[0011] Furthermore, there are four guide pillars distributed in a rectangular shape.

[0012] Beneficial effects of the utility model:

[0013] First, the utility model can form the double-sided expansion holes of the vertical tube at one time, and the stamping deformation is small, the process is more reasonable, and the product qualification rate is high;

[0014] Second, since the utility model adopts mold forming, the mold opening and closing time is extremely short, only 2-5s, which can achieve fast and efficient production;

[0015] Third, the utility model avoids material waste because no material is removed, which can greatly reduce the manufacturing cost of the product;

[0016] Fourthly, the utility model can ensure that a secondary molded product can be obtained in each mold opening and closing production cycle, and does not require multiple sets of molds, so the production cost is lower and the production efficiency can be doubled. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a comparison chart between the pipe material and the product when the riser is machined using existing conventional machining.

[0018] Figure 2 The utility model is a stereoscopic diagram of a vertical tube double-sided expansion hole mould.

[0019] Figure 3 The utility model discloses a vertical tube double-sided expansion hole die, which is a stereoscopic diagram of a vertical tube product being installed on a lower die thereof.

[0020] Figure 4 The utility model is a main cutaway view of a vertical tube double-sided expansion hole mold when the mold is closed.

[0021] Figure 5 The utility model is a top view of a vertical tube double-sided expansion hole mold when the mold is closed.

[0022] Figure 6 The utility model is a main view of a cutaway diagram of a vertical tube double-sided expansion hole mold when the mold is opened.

[0023] Figure 7 The utility model is a top view of a vertical tube double-sided expansion hole mold when the mold is opened. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0025] Example 1: See Figure 2-3 A vertical tube double-sided expansion hole mold, which includes a lower mold 1, an upper mold 2, a left mold 3 and a right mold 4.

[0026] Among them, the upper surface of the lower mold 1 is provided with a first lower semicircular mold hole 1-1 and a second lower semicircular mold hole 1-2; the lower surface of the upper mold 2 is provided with a first upper semicircular mold hole 2-1 and a second upper semicircular mold hole 2-2.

[0027] In this embodiment, the first lower semicircular die hole 1-1 and the first upper semicircular die hole 2-1 both include a first left end forming semicircular hole segment 1-11, a first middle clamping semicircular hole segment 1-12 and a first right end forming semicircular hole segment 1-13.

[0028] In this embodiment, the second lower semicircular die hole 1-2 and the second upper semicircular die hole 2-2 each include a second left end forming semicircular hole segment 1-21, a second middle clamping semicircular hole segment 1-22, and a second right end forming semicircular hole segment 1-23.

[0029] Among them, two first middle clamping semicircular hole segments 1-22 are respectively arranged on the lower die 1 and the upper die 2 and are symmetrical in the upper and lower parts, and are used to clamp the middle part of the workpiece to avoid axial displacement and radial runout during expansion hole punching.

[0030] Among them, the left side mold 3 is fixedly provided with a first left punch 3-1 and a second left punch 3-2 on the right side; the right side mold 4 is fixedly provided with a first right punch 4-1 and a second right punch 4-2 on the left side.

[0031] Among them, the first upper semicircular mold hole 2-1 and the first lower semicircular mold hole 1-1 correspond to each other in vertical position, and the second upper semicircular mold hole 2-2 and the second lower semicircular mold hole 1-2 correspond to each other in vertical position.

[0032] Among them, the first left punch 3-1, the first lower semicircular die hole 1-1 and the first right punch 4-1 are concentrically arranged.

[0033] In this way, it can be ensured that the first left punch 3-1, the second left punch 4-1, the first lower semicircular die hole 1-1 and the first upper semicircular die hole 2-1 are all concentrically arranged during mold closing, so that they can be processed accurately.

[0034] Among them, the second left punch 3-2, the second lower semicircular die hole 1-2 and the second right punch 4-2 are concentrically arranged.

[0035] In this way, it can be ensured that the second left punch 3-2, the second right punch 4-2, the second lower semicircular die hole 1-2 and the second upper semicircular die hole 2-2 are all concentrically arranged during mold closing and can be accurately processed.

[0036] In this embodiment, the middle parts of the upper forming sections of the first left punch 3-1 and the first right punch 4-1 are conical, which are used for the first forming process. The middle parts of the upper forming sections of the first right punch 4-1 and the second right punch 4-2 are stepped columnar, which are used for the second forming process.

[0037] At work, see Figure 4-5 , first drive the upper die 2 to move downward and close the die with the lower die 1, the first lower semicircular die hole 1-1 and the second lower semicircular die hole 1-2 will be combined into a first circular die closing hole; and the second lower semicircular die hole 1-2 and the second upper semicircular die hole 2-2 will be combined into a second circular die hole, at this time, the middle part of the workpiece is clamped and fixed by the second lower semicircular die hole 1-2 and the second upper semicircular die hole 2-2 and is concentrically positioned;

[0038] Then, the left side mold 3 and the right side mold 4 are driven to move toward each other, and the first left punch 3-1 and the second left punch 3-2 on the left side mold 3 are respectively inserted into the left end of the first circular mold hole (i.e., the first left end formed circular hole segment formed by the combination of the two first left end formed semicircular hole segments 1-11 symmetrically arranged above and below) and the left end of the second circular mold hole (i.e., the second left end formed circular hole segment formed by the combination of the two second left end formed semicircular hole segments 1-21 symmetrically arranged above and below); at the same time, the first right punch 4-1 and the second right punch 4-2 on the right side mold 4 are respectively inserted into the right end of the first circular mold hole (i.e., In the first right-end forming circular hole segment formed by combining the two first right-end forming semicircular hole segments 1-13 symmetrically arranged above and below) and in the right end of the second circular die hole (i.e., the second right-end forming circular hole segment formed by combining the two second right-end forming semicircular hole segments 1-23 symmetrically arranged above and below), the first step of hole expansion forming processing can be performed on the left and right ends of the workpiece 1 in the first circular die hole, and the second step of hole expansion forming processing can be performed on the left and right ends of the workpiece 2 in the second circular die hole to obtain the product (i.e., the vertical tube N, with the first connecting hole N-1 and the second connecting hole N-2 formed at both ends respectively);

[0039] Then the upper mold 2 is driven upward to open the mold, while the left mold 3 and the right mold 4 move back to open the mold (as can be seen Figure 6-7 ), then take out the workpiece 2 (which has completed two molding processes) in the second lower semicircular die hole 1-2, and take out the workpiece 1 (which has completed the first molding process) in the first lower semicircular die hole 1-1 and move it into the second lower semicircular die hole 1-2 (to wait for the second molding process), add the pipe raw material into the first lower semicircular die hole 1-1 (to wait for the first molding process), and then start the mold closing to realize the next processing.

[0040] Since the present embodiment adopts mold forming, the mold opening and closing time is extremely short, only 2-5 seconds, and fast and efficient production can be achieved.

[0041] Specifically, before closing the mold, the pipe material is placed in the first lower semicircular mold hole 1-1, and the workpiece that has completed the first step of the expansion hole forming process is placed in the second lower semicircular mold hole 1-2. The utility model can ensure that a secondary molded product can be obtained in each mold opening and closing production cycle, and does not require multiple sets of molds, the production cost is lower, and the production efficiency can be doubled.

[0042] Therefore, this embodiment can form the double-sided expansion holes of the vertical tube at one time. Due to the two-step stamping, the deformation is small, the process is more reasonable, and the product qualification rate is high. In addition, no material cutting is required, which avoids much material waste and reduces the cost.

[0043] Example 2: See Figure 3 In this embodiment, based on the first embodiment, further improvements are made:

[0044] Furthermore, the first left punch 3-1 and the second left punch 3-2 can be detachably fixed to the left side mold 3; the first right punch 4-1 and the second right punch 4-2 can be detachably fixed to the right side mold 4. Specifically, the detachable fixing method can be threaded fixing connection, anti-dropping clamping connection, etc.

[0045] Preferably, the lower die 1, the upper die 2, the left die 3 and / or the right die 4 are made of Cr12MoV material. Since Cr12MoV has high hardness and wear resistance, the service life of the die can be increased and the product molding size is more stable.

[0046] Preferably, the first left punch 3-1, the second left punch 4-1, the first right punch 3-2 and / or the second right punch 4-2 are made of Cr12MoV material. Since Cr12MoV has high hardness and wear resistance, the service life of each punch can be increased and the product molding size is more stable.

[0047] Example 3: See Figure 2-3 In this embodiment, based on the first or second embodiment, further improvements are made:

[0048] Among them, a guide post 5 is fixedly provided on the upper mold 2; specifically, the upper end of the guide post 5 is fixedly connected to the upper mold 2. The lower mold 1 is provided with a guide hole 1-3 for the guide post 5 to slide and fit. Furthermore, the guide post 5 has four and is distributed in a rectangular shape. The upper mold 2 guides and moves relative to the lower mold 1 to ensure that the first lower semicircular mold hole 1-1 and the second lower semicircular mold hole 1-2 will not be deformed when they are combined into the first circular mold hole; and the second lower semicircular mold hole 1-2 and the second upper semicircular mold hole 2-2 will not be deformed when they are combined into the second circular mold hole, thereby ensuring the molding accuracy of the product and it will not loosen.

[0049] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A vertical tube double-sided expansion hole die, characterized in that: It comprises a lower mold (1), an upper mold (2), a left mold (3) and a right mold (4); The upper surface of the lower mold (1) is provided with a first lower semicircular mold hole (1-1) and a second lower semicircular mold hole (1-2); The lower surface of the upper die (2) is provided with a first upper semicircular die hole (2-1) and a second upper semicircular die hole (2-2); A first left punch (3-1) and a second left punch (3-2) are arranged on the right side of the left side mold (3); The left side of the right mold (4) is provided with a first right punch (4-1) and a second right punch (4-2); The first upper semicircular die hole (2-1) and the first lower semicircular die hole (1-1) are located in correspondence with each other; the second upper semicircular die hole (2-2) and the second lower semicircular die hole (1-2) are located in correspondence with each other; The first left punch (3-1), the first lower semicircular die hole (1-1) and the first right punch (4-1) are arranged concentrically; the second left punch (3-2), the second lower semicircular die hole (1-2) and the second right punch (4-2) are arranged concentrically.

2. A vertical tube double-sided expansion hole mold as claimed in claim 1, characterized in that: The first lower semicircular die hole (1-1) and the first upper semicircular die hole (2-1) both comprise a first left-end forming semicircular hole segment (1-11), a first middle clamping semicircular hole segment (1-12) and a first right-end forming semicircular hole segment (1-13); The second lower semicircular die hole (1-2) and the second upper semicircular die hole (2-2) both comprise a second left-end forming semicircular hole segment (1-21), a second middle clamping semicircular hole segment (1-22) and a second right-end forming semicircular hole segment (1-23).

3. A vertical tube double-sided expansion hole mold according to claim 1, characterized in that: The first left punch (3-1) and the second left punch (3-2) can both be detachably fixed on the left side mold (3).

4. A vertical tube double-sided expansion hole die as claimed in claim 1, characterized in that: The first right punch (4-1) and the second right punch (4-2) can both be detachably fixed on the right side mold (4).

5. A vertical tube double-sided expansion hole die as claimed in claim 1, characterized in that: The lower die (1), the upper die (2), the left die (3) and / or the right die (4) are made of Cr12MoV material.

6. A vertical tube double-sided expansion hole die as claimed in claim 1, characterized in that: The first left punch (3-1), the second left punch (3-2), the first right punch (4-1) and / or the second right punch (4-2) are made of Cr12MoV material.

7. A vertical tube double-sided expansion hole die as claimed in claim 1, characterized in that: The upper die (2) is provided with a guide column (5); the lower die (1) is provided with a guide hole (1-3) for sliding fit of the guide column (5).

8. A vertical tube double-sided expansion hole die as claimed in claim 7, characterized in that: The guide pillars (5) are four and are distributed in a rectangular shape.

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