A round tube middle part bulging die

Abstract

The application discloses a middle part bulging die for a circular tube, which comprises an upper die base and a lower die base. A forming push block is arranged on the upper die base, and a positioning insert is arranged on the lower die base. The lower end of the forming push block is oppositely arranged with the upper end of the positioning insert. The upper end of the positioning insert is used for positioning and mounting a workpiece. A die forming mechanism is arranged on the lower die base. A driving mechanism is arranged on the upper die base and the lower die base. The driving mechanism drives the die forming mechanism to cooperate with the forming push block to realize the stamping forming of the workpiece. The application guarantees the flatness of the boss end face of the workpiece, and the outer surface is free of scratches. The formed workpiece is stable in size, and the operation is simple. The application saves the die production cost and the labor cost.

Description

Technical Field

[0001] This invention relates to the field of stamping die technology, specifically to a bulging die for the middle of a round tube. Background Technology

[0002] Reference Figure 1 , Figure 2 and Figure 3 The sleeve is used as the unprocessed workpiece, and a boss is formed in the middle part of the sleeve to form a switch guide sleeve. It is necessary to tap the boss to facilitate the subsequent fastening. Since the two ends are open, the forming of the middle boss is a major technical challenge of this product. When using conventional bending molds, the end face of the boss is prone to flatness during product forming and unloading, and scratches are present on the surface when demolding. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides a bulging mold for the middle part of a circular tube.

[0004] The present invention is achieved through the following technical solutions.

[0005] The technical solution of the present invention is as follows: a bulging mold for the middle part of a round tube, including an upper mold base and a lower mold base. A forming push block is provided on the upper mold base, and a positioning insert is provided on the lower mold base. The lower end of the forming push block and the upper end of the positioning insert are arranged opposite to each other. The upper end of the positioning insert is used to position and install the workpiece. A mold forming mechanism is provided on the lower mold base. A driving mechanism is provided on both the upper mold base and the lower mold base. The driving mechanism drives the mold forming mechanism to cooperate with the forming push block to realize the stamping forming of the workpiece.

[0006] Preferably, the driving mechanism includes a first wedge, a second wedge, a first stop, a second stop, and two sets of sliding components arranged opposite each other. The first wedge and the second wedge are installed on the lower end face of the upper mold base, the first stop and the second stop are installed on the upper end face of the lower mold base, and the two sets of sliding components are also installed on the upper end face of the lower mold base. The lower end of the first wedge is located between the first stop and one of the sliding components, and the lower end of the second wedge is located between the second wedge and the other set of sliding components.

[0007] Preferably, the sliding assembly includes a slider and a first spring. The slider is slidably disposed on the upper end face of the lower mold base. One end of the first spring is connected to the slider, and the other end is connected to the side wall of the positioning insert. The upper end of the slider is provided with a first inclined surface, the lower end of the first wedge is provided with a second inclined surface, and the lower end of the second wedge is provided with a third inclined surface. The two first inclined surfaces are respectively fitted with the third inclined surface and the fourth inclined surface.

[0008] Preferably, the mold forming mechanism includes a left forming insert, a right forming insert, and a forming sphere. The left forming insert and the right forming insert are respectively mounted on two sliders and are arranged opposite to each other. The upper end of the positioning insert is located between the left forming insert and the right forming insert. The forming sphere is located on the upper end face of the positioning insert. A guide rail is provided on the side wall of the right forming insert near the left forming insert. The guide rail is used to guide the movement trajectory of the forming sphere.

[0009] Preferably, the guide rail sidewall has a through-hole.

[0010] Preferably, the lower end face of the forming pusher is inclined.

[0011] Preferably, an upper pad is installed on the lower end face of the upper mold base, an upper liner is installed between the upper mold base and the upper pad, and a fixing plate is installed on the side of the upper pad away from the upper liner.

[0012] Preferably, the upper pad has a groove, a second spring is connected to the bottom of the groove, the other end of the second spring is connected to the forming push block, and the upper end of the forming push block is slidably disposed in the groove.

[0013] Preferably, a guide post is installed on the upper mold base.

[0014] Preferably, a lower pad is installed on the lower mold base, and concave templates are installed on both sides of the upper surface of the lower pad.

[0015] The beneficial effects of this invention are as follows: the workpiece is positioned on the upper end of the positioning insert, the upper mold base is pressed down, causing the forming push block to move down, which in turn drives the driving mechanism to drive the mold forming mechanism to stamp and form the workpiece in cooperation with the forming push block, ensuring that the end face of the workpiece boss is flat, the surface is free of scratches, the formed workpiece has stable dimensions, the operation is simple, and the mold production cost and labor cost are saved. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the unprocessed structure of the workpiece in this invention; Figure 2 This is a schematic diagram of the workpiece structure after processing in this invention; Figure 3 This is a top view of the workpiece after processing in this invention. Figure 4 This is a cross-sectional structural diagram of the present invention.

[0017] Reference numerals: 1-Mold handle; 2-Upper mold base; 3-Upper backing plate; 4-Fixing plate; 5-First wedge; 6-First stop; 7-Slider; 8-Right positioning insert; 9-Diaphragm plate; 10-Lower backing plate; 11-Lower mold base; 12-Positioning insert; 13-Workpiece; 14-Forming sphere; 15-Mounting groove; 16-Second stop; 17-Left slider insert; 18-Forming push block; 19-Guide post; 20-Second wedge; 21-Groove; 22-First spring; 23-Second spring; 24-Upper liner; 25-Guide rail; 26-Connecting hole. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0020] In this embodiment, refer to Figure 4 The assembly includes an upper mold base 2 and a lower mold base 11. A mold handle 1 is fixedly installed on the upper end face of the upper mold base 2, and an upper pad 3 is fixedly installed on the lower end face of the upper mold base 2. An upper liner 24 is fixedly installed between the upper mold base 2 and the upper pad 3. A fixing plate 4 is fixedly installed on the side of the upper pad 3 away from the upper liner 24, so as to realize the assembly of the basic structure of the upper mold base 2 and ensure the stability of the basic structure of the upper mold base 2. A lower pad 10 is fixedly installed on the lower mold base 11, and concave templates 9 are fixedly installed on both sides of the upper end face of the lower pad 10, so as to realize the assembly of the basic structure of the lower mold base 11.

[0021] In this embodiment, refer to Figure 4 The upper pad 3 has a groove 21. A second spring 23 is fixedly connected to the bottom of the groove 21. A forming push block 18 is fixedly connected to the other end of the second spring 23. The upper end of the forming push block 18 is slidably disposed in the groove 21. The forming push block 18 slides through the fixed plate 4 and points towards the mold base. The second spring 23 has an elastic buffering effect on the forming push block 18.

[0022] In this embodiment, refer to Figure 4A positioning insert 12 is fixedly installed on the lower pad 10. A positioning protrusion is integrally connected to the positioning insert 12. The positioning protrusion is used to position the workpiece 13. The upper end of the positioning protrusion is flush with the lowest level of the bulging position of the workpiece 13.

[0023] In this embodiment, refer to Figure 4 The lower end of the forming push block 18 is positioned opposite to the upper end of the positioning insert 12. A mold forming mechanism is provided on the lower mold base 11. A driving mechanism is provided on both the upper mold base 2 and the lower mold base 11. The driving mechanism drives the mold forming mechanism to cooperate with the forming push block 18 to achieve the stamping forming of the workpiece 13.

[0024] In this embodiment, refer to Figure 4 The driving mechanism includes a first wedge 5, a second wedge 20, a first stop 6, a second stop 16, and two sets of opposing sliding components. The first wedge 5 and the second wedge 20 are fixedly installed on the lower end face of the upper pad 3. The first wedge 5 and the second wedge 20 pass through the fixing plate 4, and the fixing plate 4 reinforces the first wedge 5 and the second wedge 20. The first stop 6 and the second stop 16 are respectively fixedly assembled on the side walls of the two concave templates 9. The two sets of sliding components are installed on the upper end face of the lower pad 10. The lower end of the first wedge 5 is located between the first stop 6 and one of the sliding components, and the lower end of the second wedge 20 is located between the second stop 16 and the other set of sliding components. The sliding assembly includes a slider 7 and a first spring 22. The slider 7 is slidably disposed on the upper end face of the lower mold base 11. The two sliders 7 are respectively located on both sides of the positioning insert 12. The slider 7 is provided with a mounting groove 15. One end of the first spring 22 is fixedly installed in the mounting groove 15, and the other end is fixedly connected to the side wall of the positioning insert 12. The upper end of the slider 7 is provided with a first inclined surface, the lower end of the first wedge 5 is provided with a second inclined surface, and the lower end of the second wedge 20 is provided with a third inclined surface. The two first inclined surfaces are respectively fitted to the second inclined surface and the third inclined surface.

[0025] When the upper mold base 2 moves downward, the first wedge 5 moves downward along the side wall of the first stop 6, and the second wedge 20 moves downward along the side wall of the second stop 16. The two first inclined surfaces move relative to the second and third inclined surfaces respectively, pushing the two sliders 7 to move closer to each other. The first spring 22 is compressed, pushing the mold forming mechanism to move towards the workpiece 13. After the workpiece 13 is formed, the upper mold base 2 moves upward, the first wedge 5 and the second wedge 20 move upward, and the sliders 7 are pushed away from each other by the first spring 22. The two first inclined surfaces move relative to the second and third inclined surfaces respectively, which facilitates the demolding of the workpiece 13.

[0026] In this embodiment, refer to Figure 4The mold forming mechanism includes a left forming insert 17, a right forming insert 8, and a forming ball 14. The left forming insert 17 and the right forming insert 8 are respectively fixedly installed on two sliders 7. The left forming insert 17 and the right forming insert 8 are arranged opposite to each other. A positioning protrusion is located between the left forming insert 17 and the right forming insert 8. The forming ball 14 is located on the upper end face of the positioning protrusion. A guide rail 25 is provided on the side wall of the right forming insert 8 near the left forming insert 17. The guide rail 25 is used to guide the movement trajectory of the forming ball 14. The lower end face of the forming push block 18 is inclined to facilitate pushing the forming ball 14 to move towards the guide rail 25.

[0027] When stamping workpiece 13, the two sliders 7 move closer to each other, pushing the left forming insert 17 and the right forming insert 8 to move closer to each other. At the same time, the forming push block 18 moves downward, pushing the forming ball 14 to move towards the guide rail 25, thus realizing the mold forming of workpiece 13.

[0028] In this embodiment, refer to Figure 4 The guide rail 25 has a through hole 26 on its side wall, which facilitates the extraction of the shaped sphere 14 from the through hole 26.

[0029] In this embodiment, refer to Figure 4 A guide post 19 is fixedly installed on the upper pad 3, and a guide groove (not shown in the figure) is provided on the lower mold base 11, which has a guiding function between the upper mold base 2 and the lower mold base 11.

[0030] The working principle of this invention: When the workpiece 13 is stamped, the workpiece 13 is positioned on the positioning protrusion. The upper die holder 2 is pressed down, causing the forming push block 18 to move downward. At the same time, the first wedge 5 moves downward along the side wall of the first stop block 6, and the second wedge 20 moves downward along the side wall of the second stop block 16. The two first inclined surfaces move relative to the second and third inclined surfaces, respectively, pushing the two sliders 7 to move closer to each other. The first spring 22 is compressed, pushing the left forming insert 17 and the right forming insert 8 to move closer to each other. At the same time, the forming push block 18 moves downward, pushing the forming ball 14 towards the guide rail 25. The upper mold base 2 moves upward, and the first wedge 5 and the second wedge 20 move upward. Under the action of the first spring 22, the slider 7 moves away from each other. The two first inclined surfaces move relative to the second and third inclined surfaces respectively. The left molding insert 17 and the right molding insert 8 move away from each other. The molding push block 18 moves upward, which facilitates demolding of the workpiece 13, ensuring that the end face of the boss of the workpiece 13 is flat and free of scratches. The dimensions of the molded workpiece 13 are stable, the operation is simple, and the mold production cost and labor cost are saved.

[0031] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural transformations made under the concept of the present invention using the description and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A bulging mold for the middle part of a circular tube, characterized in that: It includes an upper die base (2) and a lower die base (11). The upper die base (2) is provided with a forming push block (18), and the lower die base (11) is provided with a positioning insert (12). The lower end of the forming push block (18) and the upper end of the positioning insert (12) are arranged opposite to each other. The upper end of the positioning insert (12) is used to position and install the workpiece (13). The lower die base (11) is provided with a mold forming mechanism. The upper die base (2) and the lower die base (11) are jointly provided with a driving mechanism. The driving mechanism drives the mold forming mechanism to cooperate with the forming push block (18) to realize the stamping forming of the workpiece (13).

2. The bulging mold for the middle part of a circular tube according to claim 1, characterized in that: The driving mechanism includes a first wedge (5), a second wedge (20), a first stop (6), a second stop (16), and two sets of sliding components arranged opposite to each other. The first wedge (5) and the second wedge (20) are installed on the lower end face of the upper mold base (2), the first stop (6) and the second stop (16) are installed on the upper end face of the lower mold base (11), and the two sets of sliding components are also installed on the upper end face of the lower mold base (11). The lower end of the first wedge (5) is located between the first stop (6) and one of the sliding components, and the lower end of the second wedge (20) is located between the second stop (16) and the other set of sliding components.

3. The bulging mold for the middle part of a circular tube according to claim 2, characterized in that: The sliding assembly includes a slider (7) and a first spring (22). The slider (7) is slidably disposed on the upper end face of the lower mold base (11). One end of the first spring (22) is connected to the slider (7), and the other end is connected to the side wall of the positioning insert (12). The upper end of the slider (7) is provided with a first inclined surface, the lower end of the first wedge (5) is provided with a second inclined surface, and the lower end of the second wedge (20) is provided with a third inclined surface. The two first inclined surfaces are respectively fitted to the second inclined surface and the third inclined surface.

4. The bulging mold for the middle part of a circular tube according to claim 3, characterized in that: The mold forming mechanism includes a left forming insert (17), a right forming insert (8), and a forming sphere (14). The left forming insert (17) and the right forming insert (8) are respectively mounted on two sliders (7). The left forming insert (17) and the right forming insert (8) are arranged opposite to each other. The upper end of the positioning insert (12) is located between the left forming insert (17) and the right forming insert (8). The forming sphere (14) is located on the upper end face of the positioning insert (12). A guide rail (25) is provided on the side wall of the right forming insert (8) near the left forming insert (17). The guide rail (25) is used to guide the movement trajectory of the forming sphere (14).

5. The bulging mold for the middle part of a circular tube according to claim 4, characterized in that: The guide rail (25) has a through hole (26) on its side wall.

6. The bulging mold for the middle part of a circular tube according to claim 1, characterized in that: The lower end face of the forming pusher (18) is inclined.

7. The bulging mold for the middle part of a circular tube according to claim 1, characterized in that: An upper pad (3) is installed on the lower end face of the upper mold base (2), an upper liner (24) is installed between the upper mold base (2) and the upper pad (3), and a fixing plate (4) is installed on the side of the upper pad (3) away from the upper liner (24).

8. The bulging mold for the middle part of a circular tube according to claim 7, characterized in that: The upper pad (3) has a groove (21) and a second spring (23) is connected to the bottom of the groove (21). The other end of the second spring (23) is connected to the forming push block (18), and the upper end of the forming push block (18) is slidably disposed in the groove (21).

9. The bulging mold for the middle part of a circular tube according to claim 1, characterized in that: The upper mold base (2) is equipped with guide pillars (19).

10. The bulging mold for the middle part of a circular tube according to claim 1, characterized in that: The lower mold base (11) is equipped with a lower pad plate (10), and both sides of the upper end face of the lower pad plate (10) are equipped with concave templates (9).

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