Pipe fitting disposable piercing die with automatic air jet cleaning

Abstract

The utility model relates to mould technical field, concretely is a kind of disposable pipe punching die of automatic air injection cleaning, including lower die holder, upper die holder is installed in lower die holder top, lower die holder top one end is installed with core rod by mounting seat, core rod is opened with punch along length direction, and the inside of core rod is hollow structure, and the end of core rod near mounting seat is closed structure and is communicated with air injection pipe, lower die holder and upper die holder between being provided with and punch each other cooperation punch assembly, the utility model discloses core rod adopt hollow structure and open punch, cooperate the air injection pipe of intercommunication air injection pump, after punch, the automatic air injection cleaning of chip is realized, without manual intervention, both reduce the labor intensity of operator, and guarantee the timeliness and completeness of cleaning, avoid the influence of chip subsequent machining accuracy;The cooperation setting of punch assembly and punch ensures the smooth operation of punch operation, and the overall structure design is reasonable, improves the automation degree and processing efficiency of pipe punching.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically to a one-time punching mold for pipe fittings that can automatically air-clean. Background Technology

[0002] In the field of pipe fittings processing, punching is a common and critical process, and its processing accuracy and efficiency directly affect the subsequent assembly and performance of the pipe fittings.

[0003] Currently, with traditional molds, metal shavings generated during punching tend to adhere to the mandrel, and traditional cleaning methods rely primarily on manual labor. Manual cleaning has three major drawbacks: first, if cleaning is not timely, residual shavings will directly affect the positioning accuracy and hole wall smoothness of subsequent punching; second, it increases labor costs and interrupts the production process, reducing production continuity. Therefore, there is an urgent need for a one-time punching mold for pipe fittings that can automatically perform air-jet cleaning to solve these technical problems. Utility Model Content

[0004] The purpose of this invention is to provide a disposable punching die for pipe fittings that can automatically clean the mandrel with air jets, thereby preventing debris from accumulating on the mandrel.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows: An automatic air-jet cleaning disposable punching die for pipe fittings includes a lower die base, an upper die base mounted on the top of the lower die base via a first elastic element, a mandrel mounted on one end of the top of the lower die base via a mounting seat, the mandrel having punches along its length, the mandrel having a hollow internal structure, and an opening at the end of the mandrel away from the mounting seat, the end of the mandrel near the mounting seat having a sealed structure and connected to an air-jet pipe, the air-jet pipe being connected to an external air-jet pump, and a punch assembly that cooperates with the punching between the lower die base and the upper die base.

[0006] Preferably, the punching includes a first punch and a second punch, with the first punch located at the top of the mandrel and the second punch located at the bottom of the mandrel. The punch assembly includes a lower mounting plate and an upper mounting plate. The lower mounting plate is fixedly connected to the lower die base. A lower punch that cooperates with the second punch is mounted on the top of the lower mounting plate. The upper mounting plate is fixedly connected to the upper die base. An upper punch that cooperates with the first punch is mounted on the bottom of the upper mounting plate. The mandrel and the mounting base are elastically connected.

[0007] Preferably, the inner diameter of the first punch is larger than the inner diameter of the first punch.

[0008] 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.

[0009] Preferably, a plurality of second elastic members are installed on the top of the lower mounting plate, and a sliding plate is installed on the top of the second elastic members. 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. 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.

[0010] 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.

[0011] Preferably, the top of the lower mold base is detachably equipped with several limiting blocks for positioning the pipe fittings.

[0012] Preferably, the sealed end of the mandrel has an air jet channel connected to the air jet pipe at its lower interior, and the air outlet of the air jet channel has a constricted structure.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The mandrel of this invention has a hollow structure with punched holes. Combined with the air pipe connected to the air pump, it realizes automatic air cleaning of debris after punching without manual intervention. This reduces the labor intensity of operators and ensures the timeliness and thoroughness of cleaning, preventing debris from affecting the accuracy of subsequent processing. The matching arrangement of the punch assembly and the punching holes ensures the smooth progress of punching operations. The overall structural design is reasonable, improving the automation level and processing efficiency of pipe punching. Attached Figure Description

[0014] 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.

[0015] Figure 1 This is a schematic diagram of the punching die of this utility model; Figure 2 This is a schematic diagram of the front section structure of the punching die of this utility model; Figure 3 for Figure 2 Enlarged structural diagram at point A; 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.

[0016] The attached diagram lists the components represented by each number as follows: 1. Lower mold base; 2. First elastic element; 3. Upper mold base; 4. Mounting base; 41. Strip groove; 5. Mandrel; 51. Limiting post; 52. Air jet channel; 6. Punch; 7. Air jet pipe; 8. Lower mounting plate; 9. Upper mounting plate; 10. Lower punch; 11. Upper punch; 12. Spring; 13. Second elastic element; 14. Sliding plate; 15. First limiting strip; 16. Fixing plate; 17. Second limiting strip; 18. Limiting block. Detailed Implementation

[0017] 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.

[0018] like Figure 1-4 As shown: Embodiment 1 of this utility model is as follows: A disposable punching die for pipe fittings with automatic air jet cleaning includes a lower die base 1, an upper die base 3 mounted on the top of the lower die base 1 via a first elastic element 2, a mandrel 5 mounted on one end of the top of the lower die base 1 via a mounting base 4, a punch 6 formed along the length of the mandrel 5, the mandrel 5 having a hollow internal structure, and an opening provided at the end of the mandrel 5 away from the mounting base 4, and a sealed structure at the end of the mandrel 5 near the mounting base 4 connected to an air jet pipe 7, which is connected to an external air jet pump, and a punch assembly that cooperates with the punch 6 is provided between the lower die base 1 and the upper die base 3.

[0019] As can be seen from the above description, the mandrel of this utility model adopts a hollow structure and has punched holes. With the help of the air pipe connected to the air pump, it realizes automatic air cleaning of debris after punching without manual intervention. This reduces the labor intensity of operators and ensures the timeliness and thoroughness of cleaning, avoiding debris from affecting the accuracy of subsequent processing. The matching setting of the punch assembly and the punching hole ensures the smooth progress of punching operation. The overall structural design is reasonable and improves the automation level and processing efficiency of pipe punching.

[0020] Specifically, the punch 6 includes a first punch and a second punch, with the first punch located at the top of the mandrel 5 and the second punch located at the bottom of the mandrel 5. The punch assembly includes a lower mounting plate 8 and an upper mounting plate 9. The lower mounting plate 8 is fixedly connected to the lower die base 1. A lower punch 10 that cooperates with the second punch is mounted on the top of the lower mounting plate 8. The upper mounting plate 9 is fixedly connected to the upper die base 3. An upper punch 11 that cooperates with the first punch is mounted on the bottom of the upper mounting plate 8. The mandrel 5 and the mounting base 4 are elastically connected.

[0021] As described above, punching is divided into a first punch at the top of the mandrel and a second punch at the bottom, with corresponding upper and lower punches. This allows for one-time punching of both sides of the pipe fitting without multiple positioning steps, effectively reducing positioning errors and improving the coaxiality and machining accuracy of the holes. The connection method of fixing the lower mounting plate to the lower die base and the upper mounting plate to the upper die base ensures the stability of the punch installation. The elastic connection between the mandrel and the mounting base allows the mandrel to be slightly adjusted according to the force during the punching process, providing a buffer protection effect and reducing rigid collision losses between the mandrel and the punch.

[0022] Specifically, the inner diameter of the first punch is larger than the inner diameter of the first punch.

[0023] As can be seen from the above description, by setting the inner diameter of the first punch to be larger than that of the second punch, punches of different sizes can be adapted to meet the processing requirements of different hole positions of the pipe fittings, thereby satisfying the diverse punching requirements of the pipe fittings, improving the versatility of the mold, and ensuring that the residue obtained by the upper punch will not fall out from the second punch.

[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 12 is installed at the bottom of the concave part of the concave mounting base, and the spring 12 abuts against the bottom of the core rod 5.

[0025] As can be seen from the above description, the concave mounting base provides a stable mounting space for the mandrel. The cooperation between the strip groove and the limiting post enables the mandrel to slide directionally within the mounting base, preventing the mandrel from shifting during movement. The spring provides elastic support for the mandrel, further enhancing its buffering performance and ensuring that the mandrel remains stable during the punching process, thus improving the punching quality.

[0026] Specifically, a number of second elastic members 13 are installed on the top of the lower mounting plate 8, and a sliding plate 14 is installed on the top of the second elastic members 13. A number of first limiting strips 15 are symmetrically installed on the top of the lower mounting plate 8 on both sides. The top of the first limiting strip 15 passes through the sliding plate 14 and is fitted with a fixing plate 16. The sliding plate 16 is slidably connected to the first limiting strip 15. The mandrel 5 is located between the moving plate 14, the fixing plate 16 and the first limiting strips 15 on both sides.

[0027] As can be seen from the above description: the first limiting strip limits the sliding direction of the sliding plate to ensure the stability of the sliding plate's movement; the fixed plate, the sliding plate, and the first limiting strip together constitute the limiting space of the pipe fitting, which plays a good role in positioning and constraining the pipe fitting on the mandrel, further improving the punching accuracy.

[0028] Specifically, there are two core rods 5, which are arranged in parallel, and several second limiting strips 17 passing through the sliding plate 13 are arranged between the two core rods 5.

[0029] As can be seen from the above description, the two parallel mandrels enable simultaneous punching of two pipes, which greatly improves production efficiency; the second limiting strip separates and limits the pipes on the two mandrels, preventing the pipes from interfering with each other during processing and ensuring the stability and accuracy of processing the two pipes.

[0030] Specifically, the top of the lower mold base 1 is detachably equipped with several limiting blocks 18 for positioning pipe fittings.

[0031] As can be seen from the above description, the detachable limit block can flexibly adjust its position and quantity according to the different specifications such as the length and diameter of the pipe to be processed, which solves the problem of the traditional positioning structure being single and having poor adaptability, and greatly improves the mold's adaptability to the processing of diverse pipes.

[0032] Specifically, a jet channel 52 connected to the jet pipe 7 is provided at the lower part of the sealed end of the core rod 5, and the outlet end of the jet channel 52 has a constricted structure.

[0033] As can be seen from the above description: the setting of the jet channel provides a guiding path for the jet of the jet pipe, ensuring that the airflow can act precisely inside the mandrel; the outlet end of the constricted structure can increase the pressure of the jet airflow, enhance the impact force of the airflow on the debris, make the debris cleaning more thorough, and further ensure the cleanliness of the mold and the accuracy of subsequent processing.

[0034] The specific usage process of the above-mentioned punching die is as follows: First, adjust and fix the position of the limit block 18 according to the specifications of the pipe fitting to be processed, so as to achieve the initial positioning constraint of the pipe fitting.

[0035] When the pipe fitting is placed on the mandrel 5, the first limiting strip 15 limits the movement direction of the sliding plate 14, and the second limiting strip 17 separates and limits the pipe fittings on the two parallel mandrels 5, ensuring that the pipe fittings are stably placed on the mandrel 5 and do not interfere with each other. After the stamping equipment is started (the die is fixed to the press with bolts), the upper die holder 3 moves downward under the driving force, overcoming the elastic force of the first elastic element 2, which drives the upper mounting plate 9 and the upper punch 11 to move downward synchronously. At the same time, the mandrel 5 slides along the guide of the strip groove 41 within the mounting base 4 through the limiting post 51, and the spring 12 provides elastic support and buffer for the mandrel 5. When the upper punch 11 is aligned with the first punch hole at the top of the mandrel 5 and the lower punch 10 is aligned with the second punch hole at the bottom of the mandrel 5, the upper punch 11 and the lower punch 10 pass through the corresponding punch holes to perform a one-time punching operation on the upper and lower sides of the pipe fitting. Since the inner diameter of the first punch hole is larger than that of the second punch hole, different sized punches can be adapted to meet processing requirements. After punching, the upper die holder 3 resets under the elastic force of the first elastic element 2, causing the upper punch 11 to move away from the tube. At this time, the external air pump starts, and gas enters the air channel 52 at the sealed end of the mandrel 5 through the air pipe 7. After the pressure is increased at the outlet end of the constriction structure, the gas is ejected to thoroughly clean the debris inside the mandrel 5 and the hole in the tube. After cleaning, the processed tube is removed, and the next round of punching operation can be carried out.

[0036] In this embodiment, the connection method between the upper mold base 3 and the lower mold base 1 is the prior art, and this application has not improved it. The structure of the first elastic member 2 is also the prior art, and will not be described in detail in this embodiment.

[0037] In this embodiment, the air pump can be started manually (the air pump switch is located at the operating end of the punch press) or through sensor linkage. That is, during the punch press's completion of one punching and rising process, the air pump is automatically activated by the controller after being sensed by the sensor to perform air cleaning.

[0038] 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.

[0039] 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 disposable punching die for pipe fittings with automatic air jet cleaning capability, 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) mounted on one end of the top via a mounting base (4). The mandrel (5) has a punch (6) along its length. The mandrel (5) has a hollow structure inside. The end of the mandrel (5) away from the mounting base (4) has an opening. The end of the mandrel (5) near the mounting base (4) has a sealed structure and is connected to an air jet pipe (7). The air jet pipe (7) is connected to an external air jet pump. A punch assembly that cooperates with the punch (6) is provided between the lower die base (1) and the upper die base (3).

2. The one-time punching die for pipe fittings with automatic air-jet cleaning as described in claim 1, characterized in that: The punch (6) includes a first punch and a second punch, with the first punch located at the top of the mandrel (5) and the second punch located at the bottom of the mandrel (5). The punch assembly includes a lower mounting plate (8) and an upper mounting plate (9). The lower mounting plate (8) is fixedly connected to the lower die base (1). A lower punch (10) that cooperates with the second punch is mounted on the top of the lower mounting plate (8). The upper mounting plate (9) is fixedly connected to the upper die base (3). An upper punch (11) that cooperates with the first punch is mounted on the bottom of the upper mounting plate (9). The mandrel (5) is elastically connected to the mounting base (4).

3. The one-time punching die for pipe fittings with automatic air-jet cleaning as described in claim 2, characterized in that: The inner diameter of the first punch is larger than the inner diameter of the first punch.

4. The one-time punching die for pipe fittings with automatic air-jet cleaning as described in claim 2, 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 (12) is installed at the bottom of the concave part of the concave mounting base, and the spring (12) abuts against the bottom of the core rod (5).

5. The one-time punching die for pipe fittings with automatic air-jet cleaning as described in claim 2, characterized in that: The lower mounting plate (8) is equipped with several second elastic elements (13) on its top, and a sliding plate (14) is installed on the top of the second elastic elements (13). Several first limiting strips (15) are symmetrically installed on the top of the lower mounting plate (8) on both sides. The top of the first limiting strip (15) passes through the sliding plate (14) and is equipped with a fixing plate (16). The sliding plate (14) is slidably connected to the first limiting strip (15). The mandrel (5) is located between the sliding plate (14), the fixing plate (16) and the first limiting strips (15) on both sides.

6. The one-time punching die for pipe fittings with automatic air-jet cleaning as described in claim 5, characterized in that: The mandrel (5) is provided in two, and the two mandrels (5) are arranged in parallel. A number of second limiting strips (17) passing through the sliding plate (14) are provided between the two mandrels (5).

7. The one-time punching die for pipe fittings with automatic air-jet cleaning as described in claim 1, characterized in that: The lower mold base (1) has several detachable limit blocks (18) for positioning pipe fittings installed on its top.

8. The one-time punching die for pipe fittings with automatic air-jet cleaning as described in claim 1, characterized in that: The mandrel (5) has a sealed end with an air jet channel (52) connected to the air jet pipe (7) at the bottom. The air outlet of the air jet channel (52) is a constricted structure.

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