Pipe row hole punching die

Abstract

The utility model relates to the technical field of punching dies, in particular to a pipe row hole punching die which comprises an upper die assembly, a lower die assembly and an inner die core, the lower die assembly comprises a lower die base, a lower fixed floating block, a lower movable floating block and a cushion block, and the lower fixed floating block and the lower movable floating block are respectively connected with the lower die base in a floating mode. One end of the inner mold core is rotationally connected with the lower fixed floating block, the other end of the inner mold core is detachably connected with the lower movable floating block, and the inner mold core is located over the cushion block; a moving gap for the inner mold core to move up and down is formed between the inner mold core and the cushion block; the upper die assembly comprises an upper die base, a punch assembly and two upper pressing blocks. According to the pipe row hole punching die, the inner die core can be opened, closed and rotated in the floating state, pipe extraction is convenient and smooth, during die assembly, the inner die core drives the pipe to move downwards to abut against the cushion block, suspended operation of the inner die core is avoided, the rigidity and machining precision of the inner die core are maintained, and the problems that the pipe is difficult to extract, and the inner die core is prone to bending deformation are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of punching dies, in particular to a pipe punching and row hole die. Background Art

[0002] Products with row holes opened on pipes (such as community fences, residential anti-theft nets, drinking water distributors, etc.) are quite common in real life. For example, the side wall of the pipe of a drinking water distributor is provided with a plurality of inwardly turned holes with specified hole pitches, and the hole walls adopt a thread structure for connection with a shunt pipe. When a pipe fitting needs to be turned over, a pre-punching hole for turning over needs to be opened on the pipe fitting. When punching the pipe, an inner die core needs to be arranged inside the pipe for support as a punching female die to punch the hole in the pipe wall.

[0003] Conventional punching dies adopt a single-station punching mode to punch each of the multiple inwardly turned holes to be punched on the pipe one by one, which is prone to problems such as errors in hole pitch positioning and damage to the die due to the inner die core being suspended during punching operations due to positioning errors, and the punching operation efficiency is low; when using the whole inner die core for one-time multi-hole punching, there are defects such as the inner die core being prone to bending deformation during suspended operation and difficulty in extracting the pipe. Content of the Utility Model

[0004] The main purpose of the utility model is to provide a pipe punching and row hole die, in which the inner die core opens, closes and rotates in a floating state, and the extraction of the pipe is convenient and smooth. At the same time, when the pipe punching and row hole die is closed, the inner die core drives the pipe to move down until it abuts against the cushion block, avoiding the inner die core from operating in a suspended state, maintaining the rigidity of the inner die core and the processing accuracy, and solving the problems of difficult pipe extraction and easy bending deformation of the inner die core.

[0005] To achieve the above object, the pipe punching and rowing hole die proposed by the present utility model includes an upper die assembly, a lower die assembly and an inner die core. The upper die assembly is arranged above the lower die assembly. The lower die assembly includes a lower die base, a lower fixed floating block, a lower movable floating block and a cushion block. The upper surface of the lower die base is sequentially connected with the lower fixed floating block, the cushion block and the lower movable floating block along its own length direction. The lower fixed floating block and the lower movable floating block are respectively floatingly connected with the lower die base, and the cushion block is fixedly connected with the lower die base. One end of the inner die core is rotatably connected with the lower fixed floating block, and the other end of the inner die core is detachably connected with the lower movable floating block, and the inner die core is located directly above the cushion block. There is a moving gap between the inner die core and the cushion block for the inner die core to move up and down. The upper die assembly includes an upper die base, a punch assembly and two upper pressing blocks. The punch assembly and the two upper pressing blocks are respectively connected to the surface of the upper die base facing the lower die base. And the positions of the two upper pressing blocks are respectively set corresponding to the positions of the lower fixed floating block and the lower movable floating block. The punch assembly is set corresponding to the inner die core. The punch assembly includes a plurality of punching heads arranged towards the inner die core and matching with the inner die core.

[0006] Specifically and optionally, the lower die assembly further includes a positioning pin. One end of the positioning pin is fixedly connected with the lower fixed floating block, and the other end of the positioning pin is rotatably connected with the inner die core. And the axis of the positioning pin coincides with the moving direction of the lower fixed floating block. The lower movable floating block is provided with an opening groove, and the opening groove is open on one side towards the rotation direction of the inner die core. One end of the inner die core away from the lower fixed floating block is snap-fitted with the opening groove. The inner die core rotates around the positioning pin to enter or leave the opening groove.

[0007] Specifically and optionally, a through groove is formed on the end face of the lower fixed floating block facing the lower movable floating block. One end of the inner die core close to the lower fixed floating block is arranged in the through groove. One end of the positioning pin is fixedly connected with the lower fixed floating block, and the other end of the positioning pin extends into the through groove and is rotatably connected with the inner die core. The upper and lower wall surfaces of the through groove are respectively abutted against the upper and lower surfaces of the inner die core, and there are rotational clearances between the two side wall surfaces of the through groove and the inner die core respectively.

[0008] Specifically and optionally, an insertion inclined surface is extended at one end of the lower wall surface of the opening groove along the rotation direction of the inner die core, and the insertion inclined surface is inclined downward in a direction away from the opening groove.

[0009] Specifically and optionally, the lower mold assembly also includes at least two lower elastic members, and at least one of the lower elastic members is respectively connected between the lower mold base and the lower fixed floating block, and between the lower mold base and the lower movable floating block; one end of the lower elastic member is fixedly connected to the upper surface of the lower mold base, and the other end of the lower elastic member is fixedly connected to the corresponding lower fixed floating block or the lower movable floating block; the upper mold assembly also includes at least two upper elastic members, and at least one of the upper elastic members is respectively arranged between the upper pressure block and the upper mold base; one end of the upper elastic member is fixedly connected to the lower surface of the upper mold base, and the other end of the upper elastic member is fixedly connected to the corresponding upper pressure block; the total load of the upper elastic member is greater than the total load of the lower elastic member.

[0010] Specifically and optionally, the bottom ends of the lower fixed floating block and the lower movable floating block are respectively fixedly connected with at least one first protrusion, and the first protrusion is protruded outwardly in a direction perpendicular to the moving direction of the lower fixed floating block or the lower movable floating block; the lower mold assembly also includes two lower fixed blocks, and the lower fixed blocks are respectively correspondingly arranged between the lower mold base and the lower fixed floating block and between the lower mold base and the lower movable floating block; the lower fixed block is fixedly connected to the upper surface of the lower mold base, and the end surface of the lower fixed block facing away from the lower mold base is provided with a first limiting groove, and the upper end of the lower fixed block is fixedly connected with a first boss matching the first boss, and the first boss is protruded toward the central axis direction of the first limiting groove; the lower elastic member is correspondingly arranged in the first limiting groove, and the first protrusion is correspondingly arranged in the first limiting groove and is engaged with the first boss; the section of the lower fixed floating block connected to the first protrusion and the section of the lower movable floating block connected to the first protrusion move up and down in the first limiting groove respectively.

[0011] Specifically and optionally, the upper ends of the two upper pressure blocks are respectively fixedly connected with at least one second protrusion, and the second protrusion is protruding outward in a direction perpendicular to the moving direction of the upper pressure blocks; the upper mold assembly also includes two upper fixed blocks, and the upper fixed blocks are respectively correspondingly arranged between the upper mold base and the upper pressure blocks; the upper fixed block is fixedly connected to the lower surface of the upper mold base, and the end surface of the upper fixed block facing away from the upper mold base is provided with a second limiting groove, and the lower end of the upper fixed block is fixedly connected with a second boss matching the second protrusion, and the second boss is protruding in the direction of the central axis of the second limiting groove; the upper elastic member is correspondingly arranged in the second limiting groove, and the second protrusion is correspondingly arranged in the second limiting groove and is engaged with the second boss; the section of the upper pressure block connected with the second protrusion moves up and down in the second limiting groove respectively.

[0012] Specifically and optionally, the upper die assembly further includes a safety block. One end of the safety block is fixedly connected to the upper die base, and the other end of the safety block extends towards the lower die base. The safety block and the open position of the opening groove are on the same side of the upper die base. A locking space for the safety block to insert is provided between the lower movable floating block and the cushion block. The safety block moves downward with the upper die base and inserts into the locking space.

[0013] Specifically and optionally, the punch assembly further includes a fixing plate and a convex cone guide post. The fixing plate is fixedly connected to the lower surface of the upper die base. One end of the punching head is fixedly connected to the fixing plate, and the other end of the punching head protrudes from the fixing plate towards the inner die core. One end of the convex cone guide post is fixedly connected to the fixing plate, and the other end of the convex cone guide post protrudes from the fixing plate towards the inner die core. And the height of the lower end surface of the convex cone guide post is lower than the height of the lower end surface of the punching head. The number of the convex cone guide posts is two, and the two convex cone guide posts are distributed at both ends of the fixing plate in its own length direction. A plurality of punching heads are arranged between the two convex cone guide posts. A convex cone hole adapted to the convex cone guide post is provided on the end surface of the inner die core facing the fixing plate, and the convex cone holes are arranged in one-to-one correspondence with the convex cone guide posts.

[0014] Specifically and optionally, a positioning block is further fixedly connected to one end of the inner die core close to the lower fixed floating block, and the positioning block is arranged between the two convex cone holes.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. By setting the lower fixed floating block and the lower movable floating block to be respectively floatingly connected to the lower die base, and there is a moving gap for the inner die core to move up and down between the inner die core and the cushion block. When extracting the pipe, the inner die core can be opened, closed and rotated in a floating state, avoiding collision and interference between the pipe and the cushion block during pipe extraction, making the pipe extraction more convenient and smooth, and solving the problem of difficult pipe extraction in the existing punching and blanking die during use.

[0017] 2. When the pipe punching and blanking die performs the die closing operation, the inner die core and the pipe can move downward with the lower fixed floating block and the lower movable floating block, and then move downward until the bottom of the pipe abuts against the cushion block and then perform the punching and blanking operation, which can avoid the inner die core from working in suspension, maintain the rigidity of the inner die core and the machining accuracy, solve the problem that the inner die core is easy to bend and deform, help to extend the service life of the pipe punching and blanking die, and reduce the number of repairs.

[0018] 3. The pipe punching and blanking die of the utility model uses a whole inner die core to perform punching and blanking at one time, solves the problem of error in hole pitch positioning in a single-station punching die, and can effectively improve the efficiency of punching and blanking operations. Brief Description of the Drawings

[0019] Figure 1 Schematic diagram of an open mold state of a pipe punching and row - hole die according to an embodiment of the present utility model;

[0020] Figure 2 Another schematic diagram of an open mold state of a pipe punching and row - hole die according to an embodiment of the present utility model;

[0021] Figure 3 Partial structural schematic diagram of a pipe punching and row - hole die according to an embodiment of the present utility model (open mold state);

[0022] Figure 4 Partial structural schematic diagram of a pipe punching and row - hole die according to an embodiment of the present utility model (closed mold state);

[0023] Figure 5 Internal structural schematic diagram of the lower fixing block of a pipe punching and row - hole die according to an embodiment of the present utility model;

[0024] Figure 6 Internal structural schematic diagram of the upper fixing block of a pipe punching and row - hole die according to an embodiment of the present utility model.

[0025] Explanation of the reference numerals in the drawings: upper die assembly 1, upper die base 11, punch assembly 12, punching head 121, fixing plate 122, convex cone guide post 123, upper pressure block 13, upper elastic member 14, second convex block 15, upper fixing block 16, second limiting groove 161, second convex platform 162, safety block 17, lower die assembly 2, lower die base 21, lower fixed floating block 22, through - slot 221, rotation gap 222, lower movable floating block 23, opening slot 231, insertion inclined surface 232, cushion block 24, positioning pin 25, lower elastic member 26, first convex block 27, lower fixing block 28, first limiting groove 281, first convex platform 282, locking space 29, inner die core 3, die - hole through - hole 31, waste material square groove 32, convex cone hole 33, moving gap 4, handle 5, positioning block 6. Detailed Description of the Embodiments

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the attached drawings). If this specific posture changes, the directional indications will also change accordingly.

[0028] In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" can be a fixed connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] In addition, in the present utility model, descriptions such as "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0030] Please refer to Figures 1 to 2, To solve the above technical problems, the present utility model provides a pipe punching and row - hole die, which includes an upper die assembly 1, a lower die assembly 2 and an inner die core 3. The upper die assembly 1 is arranged above the lower die assembly 2. The lower die assembly 2 includes a lower die base 21, a lower fixed floating block 22, a lower movable floating block 23 and a spacer block 24. The upper surface of the lower die base 21 is sequentially connected with the lower fixed floating block 22, the spacer block 24 and the lower movable floating block 23 along its own length direction; the lower fixed floating block 22 and the lower movable floating block 23 are respectively floatingly connected with the lower die base 21, and the spacer block 24 is fixedly connected with the lower die base 21; one end of the inner die core 3 is rotatably connected with the lower fixed floating block 22, the other end of the inner die core 3 is detachably connected with the lower movable floating block 23, and the inner die core 3 is located directly above the spacer block 24; there is a moving gap 4 between the inner die core 3 and the spacer block 24 for the inner die core 3 to move up and down; the upper die assembly 1 includes an upper die base 11, a punch assembly 12 and two upper pressing blocks 13. The punch assembly 12 and the two upper pressing blocks 13 are respectively connected to the surface of the upper die base 11 facing the lower die base 21; and the positions of the two upper pressing blocks 13 are respectively corresponding to the positions of the lower fixed floating block 22 and the lower movable floating block 23, the punch assembly 12 is correspondingly arranged with the inner die core 3, and the punch assembly 12 includes a plurality of punching heads 121 arranged towards the inner die core 3 and matching with the inner die core 3.

[0031] When the pipe punching and row - hole die of the present utility model is in use, it is necessary to sleuth a pipe outside the inner die core 3. Due to the existence of the moving gap 4 between the inner die core 3 and the spacer block 24, the inner die core 3 can move up or down along with the lower fixed floating block 22 and the lower movable floating block 23. That is to say, when the pipe is sleeved on the inner die core 3, there is no contact between the pipe and the spacer block 24, which can avoid the collision and interference between the pipe and the spacer block 24 during the extraction of the pipe; at the same time, since the lower fixed floating block 22 and the lower movable floating block 23 are floatingly connected with the lower die base 21, that is, the inner die core 3 is also in a floating state, making the extraction of the pipe more convenient and smooth, and solving the problem that the extraction of the pipe is difficult when the existing punching and row - hole die is in use.

[0032] When the pipe punching and row - hole die performs the die - closing operation, the upper die assembly 1 moves downward, and the two upper pressing blocks 13 respectively press down on the lower fixed floating block 22 and the lower movable floating block 23. The inner die core 3 and the pipe move downward along with the lower fixed floating block 22 and the lower movable floating block 23. After the bottom of the pipe abuts against the spacer block 24, the punch assembly 12 performs the punching and row - hole operation, which can avoid the inner die core 3 from working in suspension and solve the problem that the inner die core 3 is easily bent and deformed.

[0033] For the pipe punching and blanking die of the present utility model, by using the whole inner die core 3 for one-time punching and blanking, the problem of error in hole pitch positioning in the single-station punching mode is solved, and at the same time, the efficiency of the punching and blanking operation can be effectively improved; the inner die core 3 can extract the pipe in a floating state, and by arranging the cushion block 24, the inner die core 3 can be prevented from being suspended when the pipe punching and blanking die is closed for punching and blanking operations, maintaining the rigidity and machining accuracy of the inner die core 3, helping to extend the service life of the pipe punching and blanking die, reducing the number of repairs, and at the same time solving the problems of difficult pipe extraction and easy bending and deformation of the inner die core 3.

[0034] Furthermore, the shape of the inner die core 3 matches the shape of the pipe to be punched. The upper surface of the cushion block 24 can be set as a plane, or a groove matching the shape of the pipe can be opened on the upper surface of the cushion block 24, which is beneficial to better support the pipe and the inner die core 3, and prevent the pipe and the inner die core 3 from being pressed and deformed and damaged during the punching operation. For example, when the pipe is a square pipe, the shape of the inner die core 3 is also square, and at this time, the upper surface of the cushion block 24 is set as a plane structure; when the pipe is a circular pipe, the shape of the inner die core 3 is correspondingly set as a cylindrical shape, and at this time, an arc-shaped groove matching the shape of the pipe is opened on the upper surface of the cushion block 24, and the arc-shaped groove is recessed.

[0035] Please refer to Figure 2 , furthermore, a plurality of die hole through-holes 31 are opened on the upper end surface of the inner die core 3, and the punching heads 121 are arranged in one-to-one correspondence with the die hole through-holes 31; a waste material square groove 32 is also opened on the inner die core 3, and the waste material square groove 32 is communicated with the die hole through-holes 31, and the waste material square groove 32 is used for receiving the waste generated after the pipe is punched and blanked. Furthermore, a plurality of the punching heads 121 are uniformly arranged along the length direction of the upper die base 11 itself.

[0036] Please refer to Figure 2 , furthermore, the lower die assembly 2 further includes a positioning pin 25. One end of the positioning pin 25 is fixedly connected to the lower fixed floating block 22, and the other end of the positioning pin 25 is rotatably connected to the inner die core 3, and the axis of the positioning pin 25 coincides with the moving direction of the lower fixed floating block 22; an opening groove 231 is opened on the lower moving floating block 23, and the opening groove 231 is open on one side in the rotation direction of the inner die core 3. One end of the inner die core 3 away from the lower fixed floating block 22 is snap-fitted with the opening groove 231, and the inner die core 3 rotates around the positioning pin 25 to enter or leave the opening groove 231.

[0037] By setting the positioning pin 25 and opening the opening groove 231 in the lower movable floating block 23, and making the axis of the positioning pin 25 coincide with the moving direction of the lower fixed floating block 22, the inner mold core 3 can be opened, closed and rotated in a floating state. When the pipe needs to be extracted, the inner mold core 3 is rotated around the positioning pin 25 until it is away from the opening groove 231, and then the pipe can be extracted. Moreover, when extracting the pipe, it will not interfere with the lower mold base 21, the cushion block 24 or the upper mold assembly 1, making the extraction of the pipe faster, more convenient and smooth, reducing the occurrence of collision damage, and solving the problem that it is difficult to extract the pipe in the existing punching and blanking hole die; when punching operations need to be carried out, the inner mold core 3 is rotated around the positioning pin 25 until it enters the opening groove 231. Since the inner mold core 3 does not need to be completely disassembled, the number of times of position adjustment of the inner mold core 3 can be reduced, effectively improving the work efficiency.

[0038] Furthermore, a handle 5 is fixedly connected to one end of the inner mold core 3 away from the lower fixed floating block 22, and the handle 5 protrudes in a direction away from the lower movable floating block 23. The handle 5 can be used as a gripper for rotating the inner mold core 3, which helps to make it more labor-saving and convenient when rotating the inner mold core 3.

[0039] Please refer to Figure 2 and Figure 5 Furthermore, a through groove 221 is opened on the end face of the lower fixed floating block 22 facing the lower movable floating block 23. One end of the inner mold core 3 close to the lower fixed floating block 22 is arranged in the through groove 221. One end of the positioning pin 25 is fixedly connected to the lower fixed floating block 22, and the other end of the positioning pin 25 extends into the through groove 221 and is rotationally connected to the inner mold core 3; the upper and lower wall surfaces of the through groove 221 are respectively abutted against the upper and lower surfaces of the inner mold core 3, and there are rotational clearances 222 between the two side wall surfaces of the through groove 221 and the inner mold core 3 respectively.

[0040] By setting the through groove 221, it can play a certain limiting role in the rotation movement path of the inner mold core 3, avoiding the rotation amplitude of the inner mold core 3 being too large and causing safety accidents or mold damage.

[0041] Please refer to Figure 2 Furthermore, an insertion inclined surface 232 is arranged at one end of the lower wall surface of the opening groove 231 along the rotation direction of the inner mold core 3, and the insertion inclined surface 232 is inclined downward in a direction away from the opening groove 231.

[0042] When the inner mold core 3 rotates away from the opening groove 231, the lower fixed floating block 22 supports the inner mold core 3, and the center of gravity of the inner mold core 3 shifts. By providing the insertion inclined surface 232, the inner mold core 3 can be conveniently and quickly inserted into the opening groove 231.

[0043] Please refer to Figure 3 , for further illustration, the lower mold assembly 2 further includes at least two lower elastic members 26. At least one of the lower elastic members 26 is respectively connected between the lower mold base 21 and the lower fixed floating block 22, and between the lower mold base 21 and the lower movable floating block 23; one end of the lower elastic member 26 is fixedly connected to the upper surface of the lower mold base 21, and the other end of the lower elastic member 26 is fixedly connected to the corresponding lower fixed floating block 22 or the lower movable floating block; the upper mold assembly 1 further includes at least two upper elastic members 14. At least one of the upper elastic members 14 is respectively provided between the upper pressing block 13 and the upper mold base 11; one end of the upper elastic member 14 is fixedly connected to the lower surface of the upper mold base 11, and the other end of the upper elastic member 14 is fixedly connected to the corresponding upper pressing block 13; the total load of the upper elastic members 14 is greater than the total load of the lower elastic members 26.

[0044] By providing the upper elastic members 14 and the lower elastic members 26, the upper mold base 11 and the upper pressing block 13 are in floating connection, so that the pipe punching and punching hole die can achieve elastic downward pressure when closing the mold and pressing down. When the pipe punching and punching hole die performs the mold closing operation, the upper mold assembly 1 descends, and the two upper pressing blocks 13 respectively press down on the lower fixed floating block 22 and the lower movable floating block 23. Since the total load of the upper elastic members 14 is greater than the total load of the lower elastic members 26, the lower elastic members 26 are compressed, and the lower fixed floating block 22 and the lower movable floating block 23 drive the inner mold core 3 and the pipe to move downward until the pipe abuts against the cushion block 24 and then stops moving downward. At this time, the upper mold assembly 1 still continues to descend, and the upper elastic members 14 continue to be compressed until the punching head 121 enters the inner mold core 3 to complete the punching and punching hole operation of the pipe.

[0045] By realizing elastic downward pressure when the pipe punching and punching hole die closes the mold and presses down, it can keep stable contact and uniform force between the pipe punching and punching hole die and the pipe, which helps to reduce the deformation of the pipe caused by impact and improve the accuracy and consistency of punching; during the punching and punching hole operation, by providing the cushion block 24, the problem that the inner mold core 3 is prone to bending and deformation is solved by avoiding the inner mold core 3 from working in suspension; after the punching and punching hole operation is completed, when the pipe punching and punching hole die opens the mold, the inner mold core 3 can float synchronously with the lower fixed floating block 22 and the lower movable floating block 23, and the pipe can be extracted in the floating state of the inner mold core 3, solving the problem of difficult pipe extraction.

[0046] Specifically, optionally, the lower elastic member 26 and the upper elastic member 14 can both be configured as springs, rubber elastic members, polyurethane elastic members, and the like.

[0047] Specifically and optionally, two of the lower elastic members 26 are connected between the lower die base 21 and the lower fixed floating block 22, two of the lower elastic members 26 are connected between the lower die base 21 and the lower movable floating block 23, and two of the upper elastic members 14 are respectively connected between the upper die base 11 and the upper pressure block 13, which helps to improve the stability of the pipe punching hole mold when the mold is closed or opened.

[0048] See also Figure 3 and Figure 5 , further explained, the bottom ends of the lower fixed floating block 22 and the lower movable floating block 23 are respectively fixedly connected with at least one first protrusion 27, and the first protrusion 27 is arranged to protrude outwardly in a direction perpendicular to the moving direction of the lower fixed floating block 22 or the lower movable floating block 23; the lower mold assembly 2 also includes two lower fixed blocks 28, and the lower fixed blocks 28 are respectively arranged between the lower mold base 21 and the lower fixed floating block 22 and between the lower mold base 21 and the lower movable floating block 23; the lower fixed blocks 28 are fixedly connected to the upper surface of the lower mold base 21, and the lower fixed blocks 28 are away from the end surface of the lower mold base 21 A first limiting groove 281 is provided, and the upper end of the lower fixed block is fixedly connected with a first boss 282 that cooperates with the first protrusion 27, and the first boss 282 is protruded toward the central axis direction of the first limiting groove 281; the lower elastic member 26 is correspondingly arranged in the first limiting groove 281, and the first protrusion 27 is correspondingly arranged in the first limiting groove 281 and is snap-connected with the first boss 282; the section of the lower fixed floating block 22 connected to the first protrusion 27 and the section of the lower movable floating block 23 connected to the first protrusion 27 move up and down in the first limiting groove 281 respectively.

[0049] It should be noted that, by setting the lower fixed block 28, the lower elastic member 26 is correspondingly set in the first limiting groove 281, and the section of the lower fixed floating block 22 connected to the first protrusion 27 and the section of the lower movable floating block 23 connected to the first protrusion 27 move up and down in the first limiting groove 281 respectively. When the tube punching hole mold is in the process of opening the mold, the first protrusion 27 moves upward under the action of the restoring force of the lower elastic member 26 until the upper end surface of the first protrusion 27 abuts against the lower end surface of the first boss 282, and the lower fixed floating block 22 and the lower movable floating block 23 no longer move upward due to the restriction of the first protrusion 27 and the first boss 282. At this time, a space for the inner mold core 3 to move downward is provided between the inner mold core 3 and the cushion block 24. During the continuous upward movement of the upper mold assembly 1, the inner mold core 3 exerts a reverse pulling force on the tube and the punching head 121 to achieve a strong separation of the punching head 121 from the tube, which is conducive to making the demolding of the tube easier.

[0050] At the same time, the first limiting groove 281 can also limit the moving paths of the lower fixed floating block 22 and the lower movable floating block 23 to avoid the position deviation of the lower movable floating block 23 and the lower fixed floating block 22 during the pressing process and affect the punching operation of the pipe.

[0051] See also Figure 3 and Figure 6 , further explained, at least one second protrusion 15 is fixedly connected to the upper ends of the two upper pressing blocks 13, and the second protrusion 15 is protruded outwardly in a direction perpendicular to the moving direction of the upper pressing blocks 13; the upper mold assembly 1 also includes two upper fixing blocks 16, and the upper fixing blocks 16 are respectively correspondingly arranged between the upper mold base 11 and the upper pressing blocks 13; the upper fixing blocks 16 are fixedly connected to the lower surface of the upper mold base 11, and the end surface of the upper fixing block 16 facing away from the upper mold base 11 is provided with a second limiting groove 1 61, the lower end of the upper fixed block is fixedly connected with a second boss 162 that cooperates with the second boss 15, and the second boss 162 is protruded toward the central axis direction of the second limiting groove 161; the upper elastic member 14 is correspondingly arranged in the second limiting groove 161, and the second boss 15 is correspondingly arranged in the second limiting groove 161 and is snap-connected with the second boss 162; the section of the upper pressure block 13 connected with the second boss 15 moves up and down in the second limiting groove 161 respectively.

[0052] It should be noted that by setting the upper fixed block 16, the upper elastic member 14 is correspondingly arranged in the second limiting groove 161. The section of the upper pressing block 13 connected to the second convex block 15 moves up and down in the second limiting groove 161. The second limiting groove 161 can limit the moving path of the upper pressing block 13, avoiding the deviation of the position of the upper pressing block 13 during the downward pressing process and affecting the punching and hole-making operation of the pipe.

[0053] Please refer to Figure 3 and Figure 4 , for further illustration, the upper die assembly 1 further includes a safety block 17. One end of the safety block 17 is fixedly connected to the upper die base 11, and the other end of the safety block 17 extends towards the lower die base 21. The safety block 17 and the open position of the opening groove 231 are on the same side of the upper die base 11; there is a locking space 29 for the safety block 17 to insert between the lower movable floating block 23 and the cushion block 24. The safety block 17 descends with the upper die base 11 and inserts into the locking space 29.

[0054] By setting the safety block 17, and since the safety block 17 and the open position of the opening groove 231 are on the same side of the upper die base 11, when the pipe punching and hole-making die is closed, the safety block 17 can descend with the upper die base 11 and insert into the locking space 29, and the locking of the rotation direction of the inner die core 3 can be realized, that is, the locking of the inner die core 3 can be realized, avoiding the inner die core 3 breaking away from the opening groove 231 during the punching and hole-making operation and causing the failure of punching and hole-making or the damage of the inner die core 3, and improving the safety and stability of the punching and hole-making operation. Specifically, optionally, the material of the safety block 17 is nylon material.

[0055] Please refer to Figure 3 and Figure 4, further explained, the punch assembly 12 also includes a fixed plate 122 and a convex cone guide column 123; the fixed plate 122 is fixedly connected to the lower surface of the upper die base 11, one end of the punching head 121 is fixedly connected to the fixed plate 122, and the other end of the punching head 121 protrudes from the fixed plate 122 in the direction of the inner die core 3; one end of the convex cone guide column 123 is fixedly connected to the fixed plate 122, and the other end of the convex cone guide column 123 protrudes from the fixed plate 122 in the direction of the inner die core 3 Setting; and the lower end surface position height of the convex cone guide column 123 is lower than the lower end surface position height of the punching head 121; the number of the convex cone guide columns 123 is two, and the two convex cone guide columns 123 are distributed at both ends of the length direction of the fixed plate 122 itself, and a plurality of the punching heads 121 are arranged between the two convex cone guide columns 123; the end surface of the inner mold core 3 facing the fixed plate 122 is provided with a convex cone hole 33 adapted to the convex cone guide column 123, and the convex cone hole 33 is arranged one-to-one with the convex cone guide column 123.

[0056] By setting the convex cone guide column 123, the inner mold core 3 is provided with a convex cone hole 33 matched with the convex cone guide column 123. When the tube punching hole mold is closed and moved downward, the convex cone guide column 123 moves downward with the upper mold base 11, and the convex cone guide column 123 first enters the convex cone hole 33 to realize the positioning of the inner mold core 3, and then a plurality of punching heads 121 are punched into the inner mold core 3 to realize the tube punching hole operation, thereby further enhancing the stability of the tube during punching holes.

[0057] Specifically, optionally, the safety block 17 is fixedly connected to the fixed plate 122, and the safety block 17 is extended in the direction of the lower die seat 21, and the lower end surface of the safety block 17 is lower than the lower end surface of the convex cone guide column 123. When the tube punching and row hole mold is closed and moved downward, the upper die seat 11 continues to move downward, and the safety block 17 is first inserted into the locking space 29 to lock the inner mold core 3, and then the convex cone guide column 123 is inserted into the corresponding convex cone hole 33 to position the inner mold core 3, and finally the punching head 121 punches into the tube and the inner mold core 3 to complete the punching and row hole operation, which can avoid the inaccurate positioning of the convex cone guide column 123 and the corresponding convex cone hole 33 due to the unstable position of the inner mold core 3, improve the alignment accuracy of the punching head 121 and the inner mold core 3, and reduce the number of debugging times.

[0058] See also Figure 3 and Figure 4 , further explained, the end of the inner mold core 3 close to the lower fixed floating block 22 is also fixedly connected with a positioning block 6, and the positioning block 6 is arranged between the two convex cone holes 33.

[0059] By providing the positioning block 6, when inserting the tube into the inner mold core 3, the tube can be manually pushed against the positioning block 6 to achieve side positioning of the tube and improve the processing accuracy of punching holes in the tube.

[0060] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A pipe punching and discharging hole die, comprising an upper die assembly, a lower die assembly and an inner die core. The upper die assembly is arranged above the lower die assembly, and is characterized in that: The lower die assembly includes a lower die base, a lower fixed floating block, a lower movable floating block and a spacer block. The upper surface of the lower die base is sequentially connected with the lower fixed floating block, the spacer block and the lower movable floating block along its own length direction; the lower fixed floating block and the lower movable floating block are respectively floatingly connected with the lower die base, and the spacer block is fixedly connected with the lower die base; One end of the inner die core is rotatably connected with the lower fixed floating block, the other end of the inner die core is detachably connected with the lower movable floating block, and the inner die core is located directly above the spacer block; There is a moving gap between the inner die core and the spacer block for the inner die core to move up and down; The upper die assembly includes an upper die base, a punch assembly and two upper pressing blocks. The punch assembly and the two upper pressing blocks are respectively connected to the surface of the upper die base facing the lower die base; and the positions of the two upper pressing blocks are respectively corresponding to the positions of the lower fixed floating block and the lower movable floating block, the punch assembly is correspondingly arranged with the inner die core, and the punch assembly includes a plurality of punching heads arranged towards the inner die core and matching with the inner die core.

2. The pipe punching and hole discharging die according to claim 1, wherein, The lower die assembly further includes a positioning pin. One end of the positioning pin is fixedly connected with the lower fixed floating block, the other end of the positioning pin is rotatably connected with the inner die core, and the axis of the positioning pin coincides with the moving direction of the lower fixed floating block; The lower movable floating block is provided with an opening groove, and the opening groove is open on one side in the rotation direction of the inner die core. One end of the inner die core away from the lower fixed floating block is snap-fitted with the opening groove, and the inner die core rotates around the positioning pin to enter or leave the opening groove.

3. The pipe punching and discharging hole die according to claim 2, characterized in that, The end face of the lower fixed floating block facing the lower movable floating block is provided with a through groove. One end of the inner die core close to the lower fixed floating block is arranged in the through groove. One end of the positioning pin is fixedly connected with the lower fixed floating block, and the other end of the positioning pin extends into the through groove and is rotatably connected with the inner die core; the upper and lower wall surfaces of the through groove are respectively abutted against the upper and lower surfaces of the inner die core, and there is a rotating gap between the two side wall surfaces of the through groove and the inner die core respectively.

4. The pipe punching and discharging hole die according to claim 2, characterized in that, The lower wall surface of the opening groove is extended with an insertion inclined surface at one end in the rotation direction of the inner die core, and the insertion inclined surface is inclined downward in a direction away from the opening groove.

5. The pipe punching and blanking die according to claim 1, characterized in that, The lower die assembly further includes at least two lower elastic members. At least one lower elastic member is respectively connected between the lower die base and the lower fixed floating block, and between the lower die base and the lower movable floating block; one end of the lower elastic member is fixedly connected with the upper surface of the lower die base, and the other end of the lower elastic member is fixedly connected with the corresponding lower fixed floating block or the lower movable floating block; The upper mold assembly also includes at least two upper elastic parts, and at least one of the upper elastic parts is correspondingly arranged between the upper pressure block and the upper mold base; one end of the upper elastic part is fixedly connected to the lower surface of the upper mold base, and the other end of the upper elastic part is fixedly connected to the corresponding upper pressure block; the total load of the upper elastic parts is greater than the total load of the lower elastic parts.

6. The pipe punching and row hole die according to claim 5, characterized in that, The bottom ends of the lower fixed floating block and the lower movable floating block are respectively fixedly connected with at least one first protrusion, and the first protrusion is arranged to protrude outwardly in a direction perpendicular to the moving direction of the lower fixed floating block or the lower movable floating block; the lower mold assembly also includes two lower fixed blocks, and the lower fixed blocks are respectively arranged between the lower mold base and the lower fixed floating block and between the lower mold base and the lower movable floating block; The lower fixing block is fixedly connected to the upper surface of the lower die base, and a first limiting groove is formed on the end surface of the lower fixing block away from the lower die base, and a first boss matched with the first convex block is fixedly connected to the upper end of the lower fixing block, and the first boss is protruded toward the central axis direction of the first limiting groove; The lower elastic member is correspondingly arranged in the first limiting groove, the first protrusion is correspondingly arranged in the first limiting groove and is engaged with the first boss; the section of the lower fixed floating block connected to the first protrusion and the section of the lower movable floating block connected to the first protrusion move up and down in the first limiting groove respectively.

7. The pipe punching and discharging hole die according to claim 5, characterized in that, The upper ends of the two upper pressing blocks are respectively fixedly connected with at least one second protrusion, and the second protrusion is arranged to protrude outward perpendicular to the moving direction of the upper pressing blocks; the upper mold assembly also includes two upper fixed blocks, and the upper fixed blocks are respectively arranged between the upper mold base and the upper pressing blocks; The upper fixing block is fixedly connected to the lower surface of the upper die seat, and a second limiting groove is formed on the end surface of the upper fixing block facing away from the upper die seat, and a second boss matched with the second convex block is fixedly connected to the lower end of the upper fixing block, and the second boss is protruded toward the central axis direction of the second limiting groove; The upper elastic member is correspondingly arranged in the second limiting groove, the second protrusion is correspondingly arranged in the second limiting groove and is connected with the second boss by clamping; the section of the upper pressing block connected with the second protrusion moves up and down in the second limiting groove respectively.

8. The tube punching and hole-drilling die according to claim 2, wherein, The upper die assembly further comprises a safety block, one end of which is fixedly connected to the upper die base, the other end of which is extended toward the lower die base, and the open position of the safety block and the open slot is located on the same side of the upper die base; A locking space for inserting the safety block is provided between the lower movable floating block and the cushion block, and the safety block moves downward along with the upper die seat and is inserted into the locking space.

9. The pipe punching and discharging hole die according to claim 8, wherein, The punch assembly further includes a fixing plate and a convex conical guide post; the fixing plate is fixedly connected to the lower surface of the upper die base, one end of the punching head is fixedly connected to the fixing plate, and the other end of the punching head protrudes from the fixing plate toward the inner die core; one end of the convex conical guide post is fixedly connected to the fixing plate, and the other end of the convex conical guide post protrudes from the fixing plate toward the inner die core; and the height of the lower end surface of the convex conical guide post is lower than the height of the lower end surface of the punching head. There are two convex conical guide posts, and the two convex conical guide posts are distributed at both ends of the fixing plate in its own length direction, and a plurality of punching heads are arranged between the two convex conical guide posts; a convex conical hole adapted to the convex conical guide post is provided on the end surface of the inner die core facing the fixing plate, and the convex conical holes are arranged in one-to-one correspondence with the convex conical guide posts.

10. The tube punching and hole discharging die according to claim 9, characterized in that, A positioning block is further fixedly connected to one end of the inner die core close to the lower fixed floating block, and the positioning block is arranged between the two convex conical holes.

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