Device for oppositely punching pipe fitting

Abstract

The utility model provides a device for oppositely punching a pipe fitting, and relates to the technical field of part manufacturing equipment. The device comprises a die base, a die core and a punching needle, a mold core mounting hole with an opening in the surface is formed in the mold base; the inner diameter of the mold core mounting hole is greater than the outer diameter of a pipe fitting; a first punching needle hole formed in an opening in the inner wall of the mold core mounting hole is formed in the mold base; the mold core is mounted in the mold core mounting hole of the mold base; the outer diameter of the mold core is smaller than the inner diameter of a pipe fitting; a second punch pin hole formed in an opening in the outer wall of the die core is formed in the die core, and the second punch pin hole is located on the extension line of the first punch pin hole; the second punching needle hole is communicated with a second blanking hole in the die core; the punching needle can move along the first punching needle hole and the second punching needle hole, and the stroke end point of the punching needle is located in the second blanking hole. The punching needle penetrates through the first punching needle hole and the second punching needle hole, a hole is formed in the side wall of the pipe fitting, and meanwhile fallen materials generated by punching are pushed to the second blanking hole and fall into the blanking bin to be collected and processed in a centralized mode.

Description

Technical Field

[0001] The utility model relates to the technical field of parts manufacturing equipment, in particular to a device for punching opposite holes in pipes. Background Art

[0002] The assembly of interior handrails is a crucial step in bus manufacturing. This process requires drilling holes into the end of the handrail tube to secure the handrail to the base. Drilling is a conventional method, but the drill bit's direction of travel is perpendicular to the surface of the stainless steel handrail tube, making it difficult to apply force and operating. Furthermore, stainless steel handrails are very hard, leading to significant drill bit wear and tear. Failure to replace the drill bit promptly can be dangerous.

[0003] Therefore, the drilling method brings great operational difficulties and safety hazards to construction workers during installation, and cannot guarantee product quality, production efficiency and eliminate safety accidents. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of the present utility model is to provide a device for punching opposite holes in pipe fittings. By setting a mold core and a mold base, the punching process occurs in the gap between the mold core and the mold base with high precision, thereby improving production efficiency and product quality.

[0005] In order to achieve the above purpose, the present invention is implemented through the following technical solutions:

[0006] The utility model provides a device for punching opposite holes in pipe fittings, comprising: a mold base, a mold core and a punching needle;

[0007] The mold base is provided with a mold core mounting hole opened on the surface, the inner diameter of the mold core mounting hole is larger than the outer diameter of the pipe; the mold base is provided with a first punching pin hole opened on the inner wall of the mold core mounting hole;

[0008] The mold core is installed in the mold core installation hole of the mold base, and the outer diameter of the mold core is smaller than the inner diameter of the pipe fitting; a second punching pin hole is provided in the mold core and is opened on the outer wall of the mold core, and the second punching pin hole is located on the extension line of the first punching pin hole;

[0009] The second punching pin hole is connected to the second blanking hole in the mold core, and the second blanking hole and the first blanking hole of the mold base form a through channel, and the channel is connected to the blanking bin;

[0010] The punching needle can move along the first punching needle hole and the second punching needle hole, and the end point of the punching needle is located in the second blanking hole.

[0011] Optionally, the cylindrical outer wall of the mold core is concentric with the cylindrical inner wall of the mold core mounting hole.

[0012] Optionally, the axis of the first punching pin hole is perpendicular to the central axis of the mold core mounting hole.

[0013] Optionally, the inner diameter of the second punching needle hole is larger than the inner diameter of the first punching needle hole.

[0014] Optionally, the mold core is provided with a limiting groove that matches the shape of the mold core installation position of the mold base.

[0015] Optionally, the punch needle is connected to a hydraulic cylinder.

[0016] Optionally, the outer wall of the mold core mounting hole is recessed toward the periphery to form a push rod hole, and the axis of the push rod hole is parallel to the axis of the mold core mounting hole; the device is provided with a push rod, and the push rod can move along the push rod hole of the mold base.

[0017] Optionally, the distance between the push rod and the mold core is smaller than the distance between the outer wall of the pipe and the mold core; the push rod hole is located outside the mold core, and the push rod does not interfere with the mold core.

[0018] Optionally, the push rod hole passes through the opposite surface of the mold base, and a plurality of push rods are connected to a push rod base outside the mold base.

[0019] Optionally, the push rod base is connected to a motion mechanism.

[0020] The beneficial effects of the utility model are as follows:

[0021] 1. This utility model uses a punch to create a hole in the sidewall of a pipe. A mold core supports the pipe internally. The punch passes through the first and second punch holes, creating a hole in the pipe sidewall. The resulting material is then pushed into the second hole. The material then passes through the first hole and falls into a hopper for centralized collection and processing. Its simple, lightweight, and highly secure structure improves production efficiency and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0023] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0024] Figure 1 This is a front view of the device for punching opposite holes in pipes in Example 1.

[0025] Figure 2 This is a front view of the device for punching opposite holes in pipes in Example 1 during the punching process.

[0026] Figure 3 This is a rear view of the device for punching opposite holes in pipes in Example 1.

[0027] Figure 4 Schematic diagram of the connection between the push rod and the push rod base in Example 1.

[0028] Figure 5 This is a schematic diagram of the cross-sectional structure of the mold core in Example 1.

[0029] Among them, 1. mold base; 2. mold core; 3. punch needle; 4. mold core mounting hole; 5. pipe fitting; 6. first punch needle hole; 7. second punch needle hole; 8. second blanking hole; 9. first blanking hole; 10. limit device; 11. push rod hole; 12. push rod; 13. push rod base. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] Example 1:

[0032] A device for punching opposite holes in pipes, such as Figure 1 As shown, it includes: a mold base 1, a mold core 2 and a punch 3;

[0033] The mold base 1 is provided with a core mounting hole 4 opened on the surface, and the inner diameter of the core mounting hole 4 is larger than the outer diameter of the pipe 5; the mold base 1 is provided with a first punching pin hole 6 opened on the inner wall of the core mounting hole 4;

[0034] The mold core 2 is installed in the mold core installation hole 4 of the mold base 1. The outer diameter of the mold core 2 is smaller than the inner diameter of the pipe 5. The mold core 2 is provided with a second punching pin hole 7 opened on the outer wall of the mold core 2. The second punching pin hole 7 is located on the extension line of the first punching pin hole 6.

[0035] like Figure 5 As shown, the second punching needle hole 7 is connected to the second blanking hole 8 in the mold core 2, and the opening of the second blanking hole 8 is downward; Figure 1 As shown, a first blanking hole 9 opposite to the second blanking hole 8 is provided in the mold base 1 below the second blanking hole 8, and the first blanking hole 9 is downwardly connected to the blanking bin;

[0036] The punching needle 3 can move along the first punching needle hole 6 and the second punching needle hole 7 , and the end point of the stroke of the punching needle 3 is located in the second blanking hole 8 .

[0037] With the above settings, when punching, Figure 2As shown, the mold core 2 supports the pipe 5 on the inside, and the punch 3 passes through the first punch hole 6 and the second punch hole 7 to create an opening on the side wall of the pipe 5. At the same time, the blanking produced by the punching is pushed to the second blanking hole 8. The blanking passes through the first blanking hole 9 and falls into the blanking bin for centralized collection and processing. Its structure is simple, lightweight and highly safe.

[0038] The inner diameter of the mold core mounting hole 4 is designed according to the outer diameter of the pipe fitting and is suitable for punching stainless steel handrails (φ30-40mm) used in the bus industry.

[0039] The mold base 1 and mold core 2 are both made by wire cutting to achieve high precision (0.2mm); and the mold base 1 and mold core 2 undergo a heat treatment process to ensure the hardness of the mold and extend its service life; it can be applied to 5-10T hydraulic cylinder stands and is flexible and convenient to disassemble and assemble.

[0040] The cylindrical outer wall of the mold core 2 is concentric with the cylindrical inner wall of the mold core mounting hole 4, so that the pipe fitting is inserted into the gap between the mold core 2 and the mold core mounting hole 4 to achieve positioning; the gap depth is determined according to the relative size of the pipe fitting end and the opening position. In this embodiment, the gap depth is 150mm.

[0041] The axis of the first punching needle hole 6 is perpendicular to the central axis of the mold core mounting hole 4, so that the punching needle 3 passes vertically through the side wall of the pipe 5 during the punching process, which is beneficial to ensure the stress state of the punching needle 3 and improve its service life.

[0042] The inner diameter of the second punching needle hole 7 is larger than that of the first punching needle hole 6, so that the side wall of the tube 5 is deformed under the action of shear force to form an opening. Then the punching needle 3 continues to move and pushes the circular blank into the second blanking hole 8.

[0043] like Figure 5 As shown, the mold core 2 is provided with a limiting device 10, which matches the shape of the mold core installation position of the mold base 1 to ensure that the mold core 2 does not loosen during the punching process.

[0044] The punching needle 3 is connected to the hydraulic cylinder and can move along the first punching needle hole 6 and the second punching needle hole 7 under the drive of the hydraulic cylinder to achieve semi-automatic operation.

[0045] The punch needle 3 has good hardness and a maximum stroke of 80 mm, ensuring effective shear force and efficiency. Its size is designed according to the range of bolt holes for fixing pipe fittings (5.5-8.5 mm), achieving high precision of the hole size.

[0046] like Figure 1As shown, the outer wall of the core mounting hole 4 is recessed toward the periphery to form a push rod hole 11, and the axis of the push rod hole 11 is parallel to the axis of the core mounting hole 4; the device is provided with a push rod 12, which moves along the push rod hole 11 of the mold base 1. The push rod 12 is used to push the pipe fitting 5 out of the gap between the core 2 and the core mounting hole 4 after the punching is completed, thereby reducing the labor intensity of the operator.

[0047] The distance between the push rod 12 and the mold core 2 is smaller than the distance between the outer wall of the pipe fitting 5 and the mold core 2, and can pass through the gap between the mold core mounting hole 4 and the mold core 2 when moving; the push rod hole 11 is located outside the mold core 2, and the push rod 12 does not interfere with the mold core 2, that is, the push rod 12 can contact the end of the pipe fitting 5 and push the pipe fitting 5 out.

[0048] like Figure 3 As shown, the push rod hole 11 passes through the opposite surface of the mold base 1, as shown in FIG. Figure 4 As shown, multiple push rods 12 are connected to the push rod base 13 outside the mold base 1, and can push the pipe 5 synchronously at multiple positions to prevent the pipe 5 from tilting during the pushing process, resulting in contact with the core mounting hole 4 or the core 2 and causing damage to the pipe or punching device.

[0049] The push rod base 13 is connected to the motion mechanism, which drives the push rod 12 to move, thereby realizing semi-automatic operation.

[0050] When punching a pipe using the device for punching opposite holes of this embodiment, the operation process includes:

[0051] Retract the punch needle 3 to the bottom end of the first punch needle hole 6, and retract the push rod 12 to the bottom end of the push rod hole 11, so that there is no obstacle in the gap between the cylindrical outer wall of the mold core 2 and the cylindrical inner wall of the mold core mounting hole 4, insert the pipe 5 to be punched into the gap between the mold core 2 and the mold core mounting hole 4, and align the first punch hole with the position to be opened of the pipe 5 through the positioning device. At this time, the device state is as follows: Figure 1 shown.

[0052] Start the hydraulic cylinder to extend the punch needle 3 along the first punch needle hole 6, and continue to move after contacting the side wall of the pipe 5 to complete the punching process. The punch needle 3 continues to move along the second punch needle hole 7, pushing the blank produced by the punching into the second blanking hole 8. After the blank enters the second blanking hole 8, it falls from the downward opening and falls through the first blanking hole 9 to the blanking bin for centralized collection and processing. At this time, the device state is as follows: Figure 2 shown.

[0053] Start the hydraulic cylinder to retract the punch needle 3 along the first punch needle hole 6 to the starting point of the stroke, start the movement mechanism connected to the push rod base 13, and extend the push rod 12 in the opposite direction of the insertion direction of the pipe 5. Figure 2As shown in the figure, the push rod 12 is partially blocked by the pipe 5, so when the push rod 12 extends forward, the pipe 5 is pushed out of the gap between the mold core 2 and the mold core mounting hole 4; then the push rod 12 is retracted to the bottom end of the push rod hole 11, so that the entire device returns to its original state. Figure 1 In the status, perform subsequent operations.

[0054] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A device for punching opposite holes in pipes, characterized in that: include: Mold base, mold core and punch pin; The mold base is provided with a mold core mounting hole opened on the surface, the inner diameter of the mold core mounting hole is larger than the outer diameter of the pipe; the mold base is provided with a first punching pin hole opened on the inner wall of the mold core mounting hole; The mold core is installed in the mold core installation hole of the mold base, and the outer diameter of the mold core is smaller than the inner diameter of the pipe fitting; a second punching pin hole is provided in the mold core and is opened on the outer wall of the mold core, and the second punching pin hole is located on the extension line of the first punching pin hole; The second punching pin hole is connected to the second blanking hole in the mold core, and the second blanking hole and the first blanking hole of the mold base form a through channel, and the channel is connected to the blanking bin; The punching needle can move along the first punching needle hole and the second punching needle hole, and the end point of the punching needle is located in the second blanking hole.

2. The device for punching opposite holes in pipes according to claim 1, characterized in that: The cylindrical outer wall of the mold core is concentric with the cylindrical inner wall of the mold core mounting hole.

3. The device for punching opposite holes in pipes according to claim 2, characterized in that: The axis of the first punching pin hole is perpendicular to the central axis of the mold core mounting hole.

4. The device for punching opposite holes in pipes according to claim 2, characterized in that: The inner diameter of the second punching needle hole is larger than the inner diameter of the first punching needle hole.

5. The device for punching opposite holes in pipes according to claim 1, characterized in that: The mold core is provided with a limiting groove, which is consistent with the shape of the mold core installation position of the mold base.

6. The device for punching opposite holes in pipes according to claim 1, characterized in that: The punching needle is connected to the hydraulic cylinder.

7. The device for punching opposite holes in pipes according to claim 1, characterized in that: The outer wall of the mold core mounting hole is recessed toward the periphery to form a push rod hole, and the axis of the push rod hole is parallel to the axis of the mold core mounting hole; the device is provided with a push rod, and the push rod can move along the push rod hole of the mold base.

8. The device for punching opposite holes in pipes according to claim 7, characterized in that: The distance between the push rod and the mold core is smaller than the distance between the outer wall of the pipe and the mold core; the push rod hole is located outside the mold core, and the push rod does not interfere with the mold core.

9. The device for punching opposite holes in a pipe according to claim 7, characterized in that: The push rod holes pass through opposite surfaces of the mold base, and a plurality of push rods are connected to a push rod base outside the mold base.

10. The device for punching opposite holes in a pipe according to claim 9, characterized in that: The push rod base is connected to the motion mechanism.

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