One-time punching die for different hole diameters of pipe fittings

Abstract

The utility model relates to mould technical field, concretely to a pipe fitting different aperture one -off punching die, including lower die seat, the upper die seat is installed to the lower die seat top through the first elastic part, the lower die seat top is installed with the core rod, the first punch hole and the second punch hole are opened to the core rod, the lower die seat top is installed with the lower mounting plate, the lower mounting plate is installed with the lower punch, the upper die seat bottom is installed with the upper mounting plate, the upper mounting plate is installed with the upper punch, the utility model discloses when the upper die seat drives the upper punch to descend, can pass through the first punch hole to complete pipe fitting top punching, can also promote pipe fitting to descend and make the lower punch pass through the second punch hole and realize bottom punching, need not step by step operation, significantly shorten processing time to improve efficiency greatly, and because punching process is completed once in the same mould, pipe fitting need not clamping many times, effectively avoid positioning error many times, ensure top and bottom hole position accurate alignment.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically a one-time punching mold for pipe fittings with different hole diameters. Background Technology

[0002] In the field of pipe fittings processing, punching is a common and critical process. Many pipe fittings require holes of different diameters to be opened at their top and bottom to meet the functional requirements of assembly, flow and other functions.

[0003] Currently, traditional pipe punching processes typically employ a step-by-step punching method. This involves first punching the top of the pipe using one set of dies, and then switching to another set of dies or adjusting the die position to punch the bottom. This step-by-step processing method requires frequent die changes or equipment parameter adjustments, which not only increases the labor intensity of operators but also significantly extends the processing cycle and reduces production efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a one-time punching die for pipe fittings with different hole diameters, which can perform one-time punching operations with different hole diameters on both sides of the pipe fittings, thereby improving production efficiency.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows: A one-time punching die for pipe fittings with different hole diameters includes a lower die base, an upper die base mounted on the top of the lower die base via a first elastic element, and a mandrel for limiting the pipe fitting elastically mounted on one side of the top of the lower die base via a mounting seat. The mandrel has several first punches and second punches along its length at its top and bottom, respectively. A lower mounting plate is mounted on the top of the lower die base, and a lower punch that mates with the second punches is mounted on the top of the lower mounting plate. An upper mounting plate is mounted on the bottom of the upper die base, and an upper punch that mates with the first punches is mounted on the bottom of the upper mounting plate. During pipe fitting punching, the upper die base drives the upper punch to descend and punch the top of the pipe fitting, while simultaneously pushing the pipe fitting downward so that the lower punch punches the bottom of the pipe fitting.

[0006] Preferably, a sliding plate is installed at the top, and a plurality of first limiting strips are symmetrically installed on the top of the lower mounting plate on both sides. The top of the first limiting strip passes through the sliding plate and is fitted with a fixing plate, and the sliding plate is slidably connected to the first limiting strip. The mandrel is located between the moving plate, the fixing plate and the first limiting strips on both sides.

[0007] Preferably, there are two core rods arranged in parallel, and a plurality of second limiting strips passing through the sliding plate are provided between the two core rods.

[0008] Preferably, the ends of the first and second limiting strips near the insertion direction of the tube are provided with chamfers, and the chamfers are provided on the sides of the first and second limiting strips near the mandrel.

[0009] Preferably, the mounting base is a concave mounting base, and the two side walls of the concave mounting base are symmetrically provided with strip grooves. One end of the mandrel is installed in the opening of the concave mounting base, and the opposite side walls of the mandrel are symmetrically provided with limiting posts that cooperate with the strip grooves. A spring is installed at the bottom of the concave part of the concave mounting base, and the spring abuts against the bottom of the mandrel.

[0010] Preferably, the top of the lower mold base is detachably equipped with several limiting blocks for positioning the pipe fittings.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention features a mandrel on the lower die base that mates with the pipe fitting. The mandrel has a first punch and a second punch at its top and bottom, respectively, which are adapted to the upper and lower punches. When the upper die base moves the upper punch downwards, it can pass through the first punch to complete the top punching of the pipe fitting, and also push the pipe fitting downwards so that the lower punch passes through the second punch to complete the bottom punching. This eliminates the need for step-by-step operations, significantly shortening processing time and greatly improving efficiency. Furthermore, because the punching process is completed in one go within the same die, the pipe fitting does not need to be clamped multiple times, effectively avoiding multiple positioning errors and ensuring precise alignment of the top and bottom holes. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the first angle structure of the punching die of this utility model; Figure 2 This is a schematic diagram of the second angle structure of the punching die of this utility model; Figure 3 This is a schematic diagram of the front section structure of the punching die of this utility model; Figure 4 This is a schematic diagram of the structure of the lower die base and its connecting components in the punching die of this utility model.

[0014] The attached diagram lists the components represented by each number as follows: 1. Lower die base; 2. First elastic element; 3. Upper die base; 4. Mounting base; 41. Strip groove; 5. Mandrel; 51. Limiting post; 6. First punch; 7. Second punch; 8. Lower mounting plate; 9. Lower punch; 10. Upper mounting plate; 11. Upper punch; 12. Second elastic element; 13. Sliding plate; 14. First limiting strip; 15. Fixing plate; 16. Second limiting strip; 17. Spring; 18. Limiting block. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figure 1-4 As shown: Embodiment 1 of this utility model is as follows: A one-time punching die for pipe fittings with different hole diameters includes a lower die base 1. An upper die base 3 is mounted on the top of the lower die base 1 via a first elastic element 2. A mandrel 5 for limiting the pipe fitting is elastically mounted on one side of the top of the lower die base 1 via a mounting seat 4. The top and bottom of the mandrel 5 are respectively provided with a plurality of first punches 6 and second punches 7 along the length direction. A lower mounting plate 8 is mounted on the top of the lower die base 1. A lower punch 9 that cooperates with the second punches 7 is mounted on the top of the lower mounting plate 8. An upper mounting plate 10 is mounted on the bottom of the upper die base 3. An upper punch 11 that cooperates with the first punches 6 is mounted on the bottom of the upper mounting plate 10. When the pipe fitting is punched, the upper die base 3 drives the upper punch 11 to descend and punch the top of the pipe fitting, while simultaneously pushing the pipe fitting down so that the lower punch 9 punches the bottom of the pipe fitting.

[0017] As can be seen from the above description, this utility model sets a mandrel that mates with the pipe on the lower die base, and opens a first punch and a second punch at the top and bottom of the mandrel respectively to match the upper punch and the lower punch. When the upper die base drives the upper punch to descend, it can pass through the first punch to complete the top punch of the pipe, and push the pipe to descend so that the lower punch passes through the second punch to complete the bottom punch. There is no need for step-by-step operation, which significantly shortens the processing time and greatly improves efficiency. Moreover, since the punching process is completed in one go in the same mold, the pipe does not need to be clamped multiple times, which effectively avoids multiple positioning errors and ensures accurate alignment of the top and bottom holes.

[0018] Specifically, a number of second elastic members 12 are installed on the top of the lower mounting plate 8, and a sliding plate 13 is installed on the top of the second elastic members 12. A number of first limiting strips 14 are symmetrically installed on the top of the lower mounting plate 8 on both sides. The top of the first limiting strip 14 passes through the sliding plate 13 and is fitted with a fixing plate 15. The sliding plate 13 is slidably connected to the first limiting strip 14. The mandrel 5 is located between the moving plate 13, the fixing plate 15 and the first limiting strips 14 on both sides.

[0019] As described above: the second elastic element at the top of the lower mounting plate cooperates with the sliding plate to provide elastic support to the bottom of the pipe before punching. During punching, it moves down synchronously with the pipe and compresses the second elastic element, providing stable support for the pipe and preventing it from deforming or shifting due to uneven force. The first limiting strips on both sides limit the pipe from opposite sides to prevent it from shifting in the length and width directions. The fixing plate constrains the position of the top of the pipe, further ensuring positioning accuracy. The sliding plate is slidably connected to the first limiting strip, and the first limiting strip provides precise guidance for the up and down movement of the sliding plate, preventing it from shifting and affecting the stability of the pipe support.

[0020] Specifically, there are two core rods 5, which are arranged in parallel, and several second limiting strips 16 passing through the sliding plate 13 are arranged between the two core rods 5.

[0021] As can be seen from the above description, two parallel mandrels can punch holes in two pipes at the same time, doubling the production efficiency compared to a single mandrel mold, making it more suitable for mass production scenarios; the second limiting strip between the two mandrels can limit the inner side of the pipe, forming an all-round constraint in conjunction with the first limiting strips on both sides, effectively preventing mutual interference or offset problems when multiple pipes are processed at the same time, and enhancing the limiting effect of multi-pipe processing.

[0022] Specifically, the ends of the first limiting strip 14 and the second limiting strip 16 near the insertion direction of the tube are provided with chamfers, and the chamfers are provided on the sides of the first limiting strip 14 and the second limiting strip 16 near the mandrel 5.

[0023] As can be seen from the above description, the chamfers at the ends of the first and second limiting strips near the insertion direction of the pipe fitting can guide the pipe fitting during insertion, allowing it to smoothly enter the limiting area without repeated position adjustments, thus reducing clamping difficulty and improving clamping efficiency. At the same time, the chamfer structure can prevent the pipe fitting from colliding and scratching with the sharp ends of the limiting strips during insertion, reducing damage to the pipe fitting surface and ensuring its appearance quality.

[0024] Specifically, the mounting base 4 is a concave mounting base. The two side walls of the concave mounting base are symmetrically provided with strip grooves 41. One end of the core rod 5 is installed in the opening of the concave mounting base. The opposite side walls of the core rod 5 are symmetrically provided with limiting posts 51 that cooperate with the strip grooves 41. A spring 17 is installed at the bottom of the concave part of the concave mounting base, and the spring 17 abuts against the bottom of the core rod 5.

[0025] As can be seen from the above description: the spring inside the concave mounting base abuts against the bottom of the mandrel. During punching, the mandrel can descend with the pipe, compress the spring, and move down along the strip groove, providing elastic buffer for the mandrel and preventing it from being damaged due to rigid force. In addition, the limiting posts on both sides of the mandrel cooperate with the strip groove of the mounting base to accurately guide the mandrel's up and down movement, prevent it from deviating, and ensure that the first and second punches on the mandrel are always accurately aligned with the upper and lower punches, thus ensuring punching accuracy.

[0026] Specifically, the top of the lower mold base 1 is detachably equipped with several limiting blocks 18 for positioning the pipe fittings.

[0027] As can be seen from the above description, the detachable limit block can be replaced or its position adjusted according to the pipe length, diameter and other specifications, so that the mold can be adapted to the positioning needs of various pipes without the need for overall replacement, greatly expanding the scope of application.

[0028] The specific operation of the above mold is as follows: Pipe clamping: According to the specifications of the pipe to be processed, select a suitable limiting block 18 and install it at the corresponding position on the top of the lower mold base 1 to position the end of the pipe. Insert the pipe along the chamfered guide at the end of the first limiting strip 14 and the second limiting strip 16 so that the pipe is sleeved on the mandrel 5. At this time, the bottom of the pipe is in contact with the top of the sliding plate 13. The sliding plate 13 is in the initial position under the support of the second elastic element 12. At the same time, the end of the pipe abuts against the limiting block 18, completing the clamping and positioning of the pipe. Punching preparation: Start the stamping equipment and fix the mold on the punch press by bolts or other means. The stamping equipment drives the upper die holder 3 to move downward. The upper die holder 3 compresses the first elastic element 2 and drives the bottom upper mounting plate 10 and upper punch 11 to descend synchronously. Top punching and pipe pressing: When the upper punch 11 descends to contact the top of the pipe, the continuing descent of the upper punch 11 passes through the first punch 6 on the mandrel 5 to perform a punching operation on the top of the pipe. The fixing plate 15 has a through hole that cooperates with the upper punch 11. At the same time, the upper punch 11 applies downward pressure to the pipe, pushing the pipe to move downward. The pipe drives the sliding plate 13 to slide downward along the first limiting strip 14, and the sliding plate 13 compresses the second elastic member 12. Bottom punching: As the pipe continues to descend, the bottom of the pipe gradually approaches the lower punch 9. When the lower punch 9 passes through the second punch 7 on the mandrel 5 and contacts the bottom of the pipe, the lower punch 9 performs a punching operation on the bottom of the pipe. The sliding plate 13 has through holes that cooperate with the lower punch, realizing one-time punching of different hole diameters at the top and bottom of the pipe. During this process, the mandrel 5 compresses the spring 17 in the mounting base 4 downward under the pressure of the pipe, and the limiting post 51 slides downward along the strip groove 41, providing buffering and guidance for the mandrel 5. Reset and Part Removal: After punching, the stamping equipment drives the upper die holder 3 to reset upwards, and the first elastic element 2 returns to its original state. At the same time, the second elastic element 12 pushes the sliding plate 13 to move upwards, and the sliding plate 13 drives the tube and mandrel 5 to reset. The mandrel 5 returns to its initial position under the action of the spring 17. Finally, the processed tube is removed from the mandrel 5, completing one processing cycle.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that modifications may be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A one-time punching die for pipe fittings with different hole diameters, comprising a lower die base (1), wherein an upper die base (3) is mounted on the top of the lower die base (1) via a first elastic element (2), characterized in that: The lower die base (1) has a mandrel (5) for limiting the pipe fitting elastically mounted on one side of the top via a mounting base (4). The mandrel (5) has several first punches (6) and second punches (7) along the length direction at the top and bottom. The lower die base (1) has a lower mounting plate (8) mounted on the top. The lower mounting plate (8) has a lower punch (9) that cooperates with the second punches (7) mounted on the top. The upper die base (3) has an upper mounting plate (10) mounted on the bottom. The upper mounting plate (10) has an upper punch (11) that cooperates with the first punches (6) mounted on the bottom. When the pipe fitting is stamped, the upper die base (3) drives the upper punch (11) to descend and punch the top of the pipe fitting, while pushing the pipe fitting down so that the lower punch (9) punches the bottom of the pipe fitting.

2. The one-time punching die for pipe fittings with different hole diameters according to claim 1, characterized in that: The lower mounting plate (8) is equipped with several second elastic elements (12) on its top, and a sliding plate (13) is installed on the top of the second elastic elements (12). Several first limiting strips (14) are symmetrically installed on the top of the lower mounting plate (8) on both sides. The top of the first limiting strip (14) passes through the sliding plate (13) and is equipped with a fixing plate (15). The sliding plate (13) is slidably connected to the first limiting strip (14). The mandrel (5) is located between the moving plate (13), the fixing plate (15) and the first limiting strips (14) on both sides.

3. The one-time punching die for pipe fittings with different hole diameters according to claim 2, characterized in that: The core rod (5) is provided in two parallel positions, and a number of second limiting strips (16) passing through the sliding plate (13) are provided between the two core rods (5).

4. The one-time punching die for pipe fittings with different hole diameters according to claim 3, characterized in that: The first limiting strip (14) and the second limiting strip (16) are provided with chamfers at the ends near the insertion direction of the tube, and the chamfers are provided on the sides of the first limiting strip (14) and the second limiting strip (16) near the mandrel (5).

5. A one-time punching die for pipe fittings with different hole diameters according to claim 1, characterized in that: The mounting base (4) is a concave mounting base. The two side walls of the concave mounting base are symmetrically provided with strip grooves (41). One end of the core rod (5) is installed in the opening of the concave mounting base. The opposite side walls of the core rod (5) are symmetrically provided with limiting posts (51) that cooperate with the strip grooves (41). A spring (17) is installed at the bottom of the concave part of the concave mounting base, and the spring (17) abuts against the bottom of the core rod (5).

6. The one-time punching die for pipe fittings with different hole diameters according to claim 1, characterized in that: The lower mold base (1) has several detachable limit blocks (18) for positioning pipe fittings installed on its top.

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