An inner supporting steel pipe opening die

Abstract

The utility model discloses an inner support type steel pipe trepanning die relates to metal pipe processing technical field, including upper die plate, upper die, lower die plate, lower die, female die, sliding block, knife edge male die and knife edge female die, upper die bottom is equipped with upper die recess, is fixed on the upper die plate, lower die top is equipped with lower die recess and knife edge female die mounting hole, is fixed on the lower die plate, female die outer contour matches upper die recess and lower die recess, can move up and down in lower die recess, has the through hole along its axial direction, and the end portion is located in the through hole and is equipped with the through hole, one end of sliding block is inserted into the hole of female die along the axial direction and the end has the inclined plane, and the inclined plane is equipped with T type groove, knife edge male die inserts T type groove and inserts female die along with sliding block until the end stretches into the through hole, and knife edge female die is fixed in knife edge female die mounting hole, and the end portion corresponds with the end portion of knife edge male die in the through hole.

Description

Technical Field

[0001] This utility model relates to the field of metal pipe processing technology, and more specifically, it relates to an internal support type steel pipe opening mold. Background Technology

[0002] In the processing of metal pipes (such as steel pipes), the side hole drilling process is widely used in the manufacturing of key parts such as automotive pipes and mechanical connectors. Its quality directly affects the product assembly accuracy and structural strength.

[0003] Traditional side-hole punching technologies include drilling, external punching dies, and laser cutting. Drilling involves rotating a drill bit, but it's inefficient and prone to producing burrs, requiring subsequent manual deburring and increasing manufacturing costs. External punching dies punch or cut from the outside of the tube inwards. While this reduces burrs, a non-uniform gap must be left between the die's inner groove and the tube's outer wall to facilitate insertion into the bending die. This gap leads to insufficient contact between the tube and the die during stamping, resulting in uneven stress and internal deformation of the tube wall, affecting assembly accuracy. Furthermore, external punching dies have complex structures, making it difficult to quickly adapt to different tube diameters or irregular hole shapes, resulting in poor versatility. Laser cutting, while achieving high-precision cuts, requires significant equipment investment and can only complete 1-2 holes per minute, resulting in low processing efficiency and hindering its adoption by small and medium-sized manufacturing enterprises. Utility Model Content

[0004] To address this problem in practical applications, the purpose of this utility model is to propose an internally supported steel pipe opening mold, the specific solution of which is as follows:

[0005] An internally supported steel pipe opening mold includes an upper template, an upper mold, a lower template, a lower mold, a concave mold, a slider, a cutting punch, and a cutting concave mold;

[0006] The bottom of the upper mold is provided with an upper mold groove, which is fixed on the upper template.

[0007] The lower mold is provided with a lower mold groove and a knife edge mold mounting hole connected thereto at the top, and is fixed on the lower template.

[0008] The outer contour of the die cavity matches the upper die groove and the lower die groove, and can move up and down in the lower die groove. An inner hole is opened along its axial direction, and a through hole corresponding to the die cavity mounting hole is provided at the end and inside the inner hole.

[0009] One end of the slider is inserted into the hole of the die along the axial direction and the end has an inclined surface with a T-slot.

[0010] The punch is inserted into the T-slot and then inserted into the die along with the slider until its end extends into the through hole;

[0011] The die-cutting die is fixed to the die-cutting die mounting hole, and its end corresponds to the end of the die-cutting punch that passes through the hole.

[0012] After the upper and lower dies are closed, the slider can move along the axial direction of the die cavity and convert the axial movement into vertical movement, driving the cutting punch to move vertically up and down to process the side hole of the steel pipe.

[0013] Furthermore, it also includes several pressure plates, which are fixed to the upper and lower molds to restrict the die cavity in the groove of the lower mold.

[0014] Furthermore, the pressure plate is fixed by bolts and the clamping force is adjusted by the bolts to accommodate different pipe diameters.

[0015] Furthermore, a spring is provided vertically between the concave mold and the lower mold to enable its up-and-down movement within the groove of the lower mold.

[0016] Furthermore, the movement gap between the die cavity and the lower die is 3-4 mm.

[0017] Furthermore, the arc-shaped surface of the slider facing away from the T-slot matches the inner wall of the die cavity.

[0018] Furthermore, the slider is driven by a drive mechanism to move along the die cavity axially, and the drive mechanism is a hydraulic cylinder or a pneumatic cylinder.

[0019] Furthermore, the cutting edge die and the cutting edge punch are modular structures.

[0020] Furthermore, the cutting edge die is fixed to the lower die by bolts.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] (1) The opening mold provided in this application matches the inner wall of the steel pipe with the concave mold and drives the cutting punch of the slider to convert the axial movement into vertical movement, thereby realizing fast and continuous internal support steel pipe side hole processing. This not only ensures that the pipe is subjected to uniform force during the opening process and significantly reduces the concave deformation of the steel pipe after the opening, but also ensures that the opening is burr-free, improves the opening accuracy and surface quality, and improves the processing efficiency.

[0023] (2) By adopting modular die and punch, it is easy to quickly replace and adjust according to the opening requirements. At the same time, the pressure plate can be adapted to steel pipes of different diameters by adjusting the pre-tightening force, which improves the versatility and flexibility of the mold.

[0024] (3) This application avoids subsequent manual grinding and deburring, and also eliminates the need for expensive laser cutting equipment. It reduces manual intervention and subsequent processing steps, lowers manufacturing costs, and is conducive to its promotion in small and medium-sized production enterprises, thus improving economic efficiency. Attached Figure Description

[0025] Figure 1 This is an overall schematic diagram of an embodiment of the present utility model;

[0026] Figure 2 This is a right-side view of an embodiment of the present invention;

[0027] Figure 3 This utility model Figure 2 Sectional view at point AA;

[0028] Figure 4 This is a schematic diagram of the upper mold structure (in cross-sectional view) in an embodiment of this utility model;

[0029] Figure 5 This is a schematic diagram of the lower mold structure (in cross-sectional view) in an embodiment of this utility model;

[0030] Figure 6 This is a schematic diagram of the punch structure in a cross-sectional view in an embodiment of this utility model;

[0031] Figure 7 This is a front view of the slider in an embodiment of this utility model;

[0032] Figure 8 This is a perspective view of the slider in an embodiment of the present invention;

[0033] Figure 9 This is a front view of an embodiment of the present invention;

[0034] Figure 10 This utility model Figure 9 Sectional view at point BB;

[0035] Figure 11 This is a schematic diagram (in cross-sectional view) of the cutting edge punch and cutting edge die in an embodiment of this utility model.

[0036] Reference numerals: 1. Upper template; 2. Upper mold; 3. Lower template; 4. Lower mold; 5. Die; 51. First section; 52. Second section; 6. Slider; 7. Punch; 8. Die; 9. Pressure plate; 10. Upper mold groove; 11. Lower mold groove; 12. Die mounting hole; 13. Inner hole; 14. Through hole; 15. Inclined surface; 16. T-slot; 17. Spring;

[0037] 100. Steel pipe. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0039] An internally supported steel pipe opening mold, such as Figure 1-3 As shown, it includes an upper template 1, an upper mold 2, a lower template 3, a lower mold 4, a concave mold 5, a slider 6, a cutting punch 7, a cutting concave mold 8, and a pressure plate 9.

[0040] Wherein: the upper template 1 and the lower template 3 are set parallel to each other. The upper template 2, combined with... Figure 4 It is fixed to the bottom of the upper mold plate 1, and its bottom is provided with an upper mold groove 10. The lower mold 4 is combined with... Figure 5 It is fixed to the top of the lower template 3, and its top is provided with a lower mold groove 11 and a cutting edge mold mounting hole 12 communicating with the lower mold groove 11. The cutting edge mold mounting hole 12 matches the cutting edge mold 8. Figure 6 The outer contour of the die 5 matches the upper die groove 10 and the lower die groove 11, and the die 5 can move up and down in the lower die groove 11 to facilitate the steel pipe 100 entering the die for opening. The die 5 has an inner hole 13 along its axial direction, and one end of the die 5, near the end position, has a through hole 14 corresponding to the cutting edge die mounting hole 12 within the inner hole 13. Figure 7-8 One end of the slider 6 is inserted axially into the inner hole 13 of the die 5, and this end has an inclined surface 15. The inclined surface 15 has a T-slot 16, the direction of which is consistent with the direction of the inclined surface 15. The slider 6 is driven by a driving mechanism (not shown in the figure) to move axially along the die 5. The driving mechanism is a hydraulic cylinder or a pneumatic cylinder. The cutting punch 7 is inserted into the T-slot 16 and is inserted into the inner hole 13 of the die 5 along with the slider 6 until its end extends into the through hole 14 to restrict the axial movement of the cutting punch 7 and ensure its up-and-down movement within the through hole 14. The cutting die 8 is installed in the cutting die mounting hole 12, and the end of the cutting die 8 corresponds to the end of the cutting punch 7 in the through hole 14. The pressure plate 9 is fixed on the upper die 2 and the lower die 4 to restrict the die 5 in the lower die groove 11.

[0041] After the upper mold 2 and the lower mold 4 are closed, the slider 6 can move along the axial direction of the die 5 and convert the axial movement into vertical movement, driving the cutting punch 7 to move vertically up and down to process the side hole of the steel pipe.

[0042] More specifically, in one possible embodiment, see Figure 6 The concave die 5 has a T-shaped cross-section, consisting of an integrally connected first section 51 and second section 52.

[0043] The outer contour of the first segment 51 matches that of the steel pipe 100, preferably a cylindrical or square structure, and the outer contour of the first segment 51 is determined by the shape of the steel pipe 100. A hole 14 is opened at one end of the first segment 51 near the end position.

[0044] The second segment 52 is preferably a square structure, with one side of its side contacting the pressure plate 9 to restrict the die 5 from being positioned within the lower die groove 11 (see...). Figure 3 This ensures the stability of the die 5 during the drilling process. The pressure plate 9 is fixed by bolts (not shown in the figure), and the clamping force is adjusted by the bolts to accommodate drilling requirements for steel pipes of different diameters. By adjusting the tightness of the bolts, the clamping force of the pressure plate 9 on the steel pipe 100 can be flexibly controlled, ensuring that the steel pipe does not move or deform during the drilling process, thus improving the stability and consistency of the drilling. Preferably, four pressure plates 9 are provided, with every two pressure plates 9 fixed to the upper die 2 and the lower die 4 respectively, to achieve comprehensive clamping of the second section 52.

[0045] like Figure 9-10 As shown, to enable the die 5 to move up and down within the lower mold groove 11, a spring 17 is vertically positioned between the die 5 and the lower mold 4. In one possible embodiment, two springs 17 are provided. The bottom of the second section 52 of the die 5 has two first spring mounting slots (not shown in the figure), and the top of the lower mold 4 has two second spring mounting slots (not shown in the figure) corresponding to the spring 17 mounting slots. The two ends of the two springs 17 are respectively fixed in a set of first spring mounting slots and second spring mounting slots. The up and down movement of the die 5 within the lower mold groove 11 is achieved by the elastic force of the springs 17. Furthermore, preferably, the movement gap between the die 5 and the lower mold 4 is 3-4 mm to accommodate the wall thickness of the steel pipe, allowing the steel pipe to enter the mold and achieve the opening.

[0046] Back Figure 3 The side surface of the slider 6 facing away from the T-slot 16 matches the inner wall of the die 5 to ensure the stability of the slider 6 during axial movement, reduce the positioning deviation of the punch 7 caused by shaking, and improve the opening accuracy.

[0047] like Figure 11As shown, the cutting edge die 8 and the cutting edge punch 7 are modular structures. In this embodiment, a modular structure is given, taking a round steel pipe as an example: the upper cross-section of the cutting edge punch 7 is T-shaped, matching the T-slot 16 on the slider 6, and the lower surface is an arc-shaped surface that matches the inner contour of the steel pipe 100; the cutting edge die 8 has a hole (not shown in the figure) along its vertical direction that matches the cutting edge punch 7, and its upper part is also an arc-shaped surface that matches the outer contour of the steel pipe 100. The modular design of the cutting edge die 8 and the cutting edge punch 7 facilitates quick replacement and adjustment according to different hole-opening requirements. In addition, the cutting edge die 8 is fixed to the lower die 4 with bolts to ensure the stability of the cutting edge die 8 during the hole-opening process and avoid the impact of loosening on the hole-opening quality.

[0048] The working process of this utility model is as follows:

[0049] Hole-opening stage: The steel pipe 100 is placed in the preset fixing position outside the die 5 to ensure that the position of the steel pipe is accurate and matches the outer contour of the first section 51 of the die 5. There is no gap between the steel pipe and the die to avoid the inner wall of the pipe after stamping. The upper die 2 and the lower die 4 are closed, and the drive mechanism starts to work, driving the slider 6 to move along the axial direction of the die 5. During the movement of the slider 6, the design of its inclined surface 15 converts the axial movement into vertical movement, driving the cutting punch 7 to move vertically up and down to process the side hole of the steel pipe. During the up and down movement of the cutting punch 7 through the hole 14, it cooperates with the cutting die 8 to complete the hole-opening operation of the steel pipe.

[0050] End of the opening stage: After the opening is completed, the drive mechanism moves in the opposite direction, driving the slider 6 to move in the opposite direction along the axis of the die 5 until the punch 7 comes out of the side hole of the steel pipe, the upper die 2 and the lower die 4 separate, and the steel pipe with the opening is taken out, thus completing one opening.

[0051] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A type of internally supported steel pipe opening mold, characterized in that, It includes an upper template, upper mold, lower template, lower mold, die, slider, punch, and die. The bottom of the upper mold is provided with an upper mold groove, which is fixed on the upper template. The lower mold is provided with a lower mold groove and a knife edge mold mounting hole connected thereto at the top, and is fixed on the lower template. The outer contour of the die cavity matches the upper die groove and the lower die groove, and can move up and down in the lower die groove. An inner hole is opened along its axial direction, and a through hole corresponding to the die cavity mounting hole is provided at the end and inside the inner hole. One end of the slider is inserted into the hole of the die along the axial direction and the end has an inclined surface with a T-slot. The punch is inserted into the T-slot and then inserted into the die along with the slider until its end extends into the through hole; The die is fixed in the die mounting hole, and its end corresponds to the end of the punch that passes through the hole.

2. The internally supported steel pipe opening mold according to claim 1, characterized in that, It also includes several pressure plates, which are fixed to the upper and lower molds to restrict the die cavity in the groove of the lower mold.

3. The internally supported steel pipe opening mold according to claim 2, characterized in that, The pressure plate is fixed by bolts and the clamping force can be adjusted by the bolts to accommodate different pipe diameters.

4. The internally supported steel pipe opening mold according to claim 1, characterized in that, A spring is provided vertically between the concave mold and the lower mold to enable its up-and-down movement within the groove of the lower mold.

5. The internally supported steel pipe opening mold according to claim 4, characterized in that, The movement gap between the die and the lower die is 3-4 mm.

6. The internally supported steel pipe opening mold according to claim 1, characterized in that, The arc-shaped surface of the slider facing away from the T-slot matches the inner wall of the die cavity.

7. The internally supported steel pipe opening mold according to claim 1, characterized in that, The slider is driven by a drive mechanism to move along the die cavity axis, and the drive mechanism is a hydraulic cylinder or a pneumatic cylinder.

8. The internally supported steel pipe opening mold according to claim 1, characterized in that, The cutting edge concave die and the cutting edge convex die are modular structures.

9. The internally supported steel pipe opening mold according to claim 1, characterized in that, The cutting edge die is fixed to the lower die by bolts.

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