A reciprocating punching device for metal pipe fittings

Abstract

The present invention discloses a reciprocating punching device for metal pipe fittings, which relates to the field of reciprocating punching devices for metal pipe fittings, and includes a pipe feeding unit and a support member resetting unit. The pipe feeding unit is fixedly connected to a punching column, and the pipe feeding unit includes an annular track and a plurality of pressure telescopic rods. The plurality of pressure telescopic rods are fixedly installed on the annular track at equal intervals, and the lower ends of the pressure telescopic rods are subjected to force to change the telescopic state, one of the pressure telescopic rods is in an extended state, and the telescopic end of the pressure telescopic rod passes through a punching hole and contacts a support member, the annular track can periodically drive the plurality of pressure telescopic rods to move a certain distance, and the support member resetting unit can reset the support member after feeding. Through the overall structural setting, it is ensured that there is always a pressure telescopic rod in contact with the support member during its movement, and its rotation direction is limited to prevent it from shaking or shifting.

Description

Technical Field

[0001] The invention relates to the field of pipe punching, and in particular to a reciprocating punching device for metal pipes. Background Art

[0002] Metal pipes often need to be punched during the processing. During the punching process, in order to prevent the pipe from being dented during punching, it is usually necessary to place a liner core in the pipe before punching. In order to be able to punch multiple holes continuously on a pipe, the pipe needs to be fed forward periodically during punching. When the pipe is short, the liner core can be driven forward with the pipe, but when the pipe is long, it is inconvenient to drive the liner core forward with the pipe.

[0003] Chinese patent application CN115213287A discloses a continuous punching device for slender hardware pipe fittings. A support unit is arranged inside the pipe fitting, and a positioning unit is arranged on the punching unit. The support unit supports the pipe during punching. After one punching is completed, the pipe is fed forward, and the support unit is fed forward together with the pipe. During the next punching, the punching unit can drive the positioning unit to push the support unit to reset through the hole punched on the pipe fitting, thereby ensuring that the support unit is always in the punching position to support the punching. However, in this solution, when the pipe fitting is fed forward, the support unit and the positioning unit are in a disengaged state. Moving the pipe fitting may cause the support unit to shake and shift, affecting the subsequent positioning unit to push the support unit to reset, resulting in the inability to continue punching. Summary of the invention

[0004] The purpose of the present application is to provide a reciprocating punching device for metal pipes, which is configured to fix a pipe feeding unit to a punching column, wherein the pipe feeding unit includes an annular track and a plurality of pressure telescopic rods, wherein the plurality of pressure telescopic rods are fixedly installed on the annular track at equal distances, and the lower ends of the pressure telescopic rods are subjected to force to change the telescopic state, wherein one of the pressure telescopic rods is in an extended state, and the telescopic end of the pressure telescopic rod passes through a punching hole and contacts a support member, and the annular track can periodically drive the plurality of pressure telescopic rods to move a certain distance, and the support member resetting unit can reset the support member after feeding, and after one punching, the annular track is driven to drive the pressure telescopic rod to move, and the pressure telescopic rod in the extended state is moved. The rod drives the pipe fitting and the support member to feed synchronously, one of the pressure telescopic rods in the shortened state moves to the original position of the pressure telescopic rod in the extended state, the support member resetting unit resets the support member, and then the next punching is performed, the punching column drives the pipe fitting feeding unit to lift and lower, the pressure telescopic rod in the extended state shortens and separates from the pipe fitting, one of the pressure telescopic rods in the shortened state extends and contacts with the support member, and the above operations are repeated to ensure that the support member can always support the punching part of the pipe fitting, and that during the movement of the support member, there is always a pressure telescopic rod in contact with it to limit its rotation direction to prevent it from shaking or shifting, which would make subsequent punching work impossible.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a reciprocating punching device for metal pipes, comprising a punching unit and a support member, wherein the punching unit comprises a punching column, wherein the punching column can reciprocatingly punch the pipe, wherein the support member can support the inner wall of the pipe, and further comprises a pipe feeding unit and a support member resetting unit, wherein the pipe feeding unit is fixedly connected to the punching column, wherein the pipe feeding unit comprises an annular track and a plurality of pressure telescopic rods, wherein the plurality of pressure telescopic rods are fixedly installed on the annular track at equal distances, wherein the pressure telescopic rod comprises a sleeve, a telescopic rod, a spring and a fixing ring, wherein one end of the spring is fixedly connected to the upper end of the telescopic rod, and the sleeve sleeve It is arranged at the upper end of the telescopic rod, and the fixing ring is fixedly installed on the inner wall of the top of the sleeve. The bottom of the fixing ring is provided with a plurality of openings in an annular array, and a first inclined surface is circumferentially provided above the opening, and a protruding horizontal surface is provided below the opening. The upper end of the telescopic rod is elastically provided with a plurality of steering protrusions and engaging protrusions in an annular array. The lower end of the pressure telescopic rod is subjected to force to change the telescopic state, one of the pressure telescopic rods is in an extended state, and the telescopic end of the pressure telescopic rod contacts the support member through the punching hole, and the annular track can periodically drive the plurality of pressure telescopic rods to move a certain distance, and the support member resetting unit can reset the support member after feeding.

[0006] Preferably, it also includes a base plate, and the stamping unit, the pipe feeding unit and the support member resetting unit are fixedly installed on the base plate in a straight line in sequence, and the stamping unit also includes a first pipe sleeve, a first vertical plate, a turntable, a first motor, a horizontal plate, a lifting rod and a strip ring sleeve, the first pipe sleeve is fixedly connected to the base plate, the first vertical plate is fixedly installed on the top of the first pipe sleeve, the turntable is rotatably installed on one side of the first vertical plate, a driving column is fixedly installed on the edge of the turntable, the first motor is fixedly installed on the other side of the first vertical plate, the output end of the first motor is inserted through the first vertical plate and is fixedly connected to the turntable, the horizontal plate is fixedly installed on the top of the first vertical plate, the lifting rod is inserted through the horizontal plate and is slidably connected with it, the strip ring sleeve is fixedly installed at the lower end of the lifting rod, the punching column is fixedly installed at the bottom of the strip ring sleeve, and the driving column is inserted through the strip ring sleeve.

[0007] Preferably, the pipe feeding unit includes a second vertical plate, a second horizontal plate and a second motor, the second vertical plate is fixedly connected to the bottom plate, the second horizontal plate is slidably installed on one side of the second vertical plate, the second horizontal plate is fixedly connected to the punching column, the annular track is installed at the bottom of the second horizontal plate, the annular track includes a fixed track, a chain and two sprockets, the fixed track is formed by two arc segments and two straight segments interlaced, the two sprockets are respectively installed at the center of the two arc segments, the chain is sleeved on the two sprockets and cooperates with the two sprockets, one end of the multiple pressure telescopic rods is slidably connected to the fixed track and fixedly connected to the chain.

[0008] Preferably, the support member resetting unit includes a second pipe sleeve, a mounting frame and a cylinder, the second pipe sleeve is fixedly connected to the base plate, the mounting frame is fixedly installed on the top of the second pipe sleeve, the cylinder is fixedly installed on the top of the mounting frame, and a pushing block is fixedly installed on the telescopic end of the cylinder, and the bottom of the pushing block is semicircular.

[0009] Preferably, the plurality of locking protrusions are arranged below the plurality of turning protrusions, the top of the turning protrusion is circumferentially provided with a second inclined surface, the bottom of the turning protrusion is radially provided with a third inclined surface, the top of the locking protrusion is radially provided with a fourth inclined surface, the inner wall of the top of the sleeve is provided with an upper locking groove, and the inner wall of the bottom of the sleeve is provided with a lower locking groove.

[0010] Preferably, a plurality of limit grooves are equidistantly arranged axially on the inner wall of the lower half of the sleeve, a plurality of upper grooves and a plurality of lower grooves are staggered between two adjacent limit grooves, and a plurality of limit protrusions are equidistantly arranged axially on the upper end of the telescopic rod.

[0011] Preferably, a groove is provided on the top of the support member, a contact block is fixedly mounted on the lower end of the telescopic rod, the width of the contact block is the same as that of the groove, and a roller is rotatably mounted on the bottom of the contact block.

[0012] Preferably, an arc-shaped support plate is fixedly mounted on one end of the support member, a circular hole is provided on the top of the arc-shaped support plate, a debris groove is provided on one end of the support member, the debris groove is arranged directly below the circular hole, and a pushing slope is provided on the other end of the support member.

[0013] Preferably, a plurality of balls are evenly and rotatably mounted on the arc surface at the bottom of the support member.

[0014] In summary, the technical effects and advantages of the present invention are as follows:

[0015] 1. In the present invention, the pipe feeding unit is fixedly connected to the punching column, and the pipe feeding unit includes an annular track and a plurality of pressure telescopic rods, and the plurality of pressure telescopic rods are fixedly installed on the annular track at equal intervals, and the lower ends of the pressure telescopic rods are subjected to force to change the telescopic state, and one of the pressure telescopic rods is in an extended state, and the telescopic end of the pressure telescopic rod passes through the punching hole and contacts the support member, and the annular track can periodically drive the plurality of pressure telescopic rods to move a certain distance, and the support member resetting unit can reset the support member after feeding, and after one punching, the annular track is driven to drive the pressure telescopic rod to move, and the pressure telescopic rod in the extended state drives the pipe fitting and the support member to move simultaneously Step feeding, one of the shortened pressure telescopic rods moves to the original position of the extended pressure telescopic rod, the support member reset unit resets the support member, and then the next punching is performed, the punching column drives the pipe feeding unit to lift once, the extended pressure telescopic rod shortens and separates from the pipe, one of the shortened pressure telescopic rods lengthens and contacts the support member, and the above operation is repeated to ensure that the support member can always support the punching part of the pipe, and there is always a pressure telescopic rod in contact with the support member during the movement of the support member, and the rotation direction of the support member is limited to prevent it from shaking or shifting, which makes the subsequent punching work impossible;

[0016] 2. In the present invention, in the punching unit, the first vertical plate is fixedly installed on the top of the first pipe sleeve, the turntable is rotatably installed on one side of the first vertical plate, a driving column is fixedly installed on the edge of the turntable, the first motor is fixedly installed on the other side of the first vertical plate, the output end of the first motor is inserted through the first vertical plate and fixedly connected with the turntable, the cross plate is fixedly installed on the top of the first vertical plate, the lifting rod is inserted through the cross plate and slidably connected with it, the strip ring sleeve is fixedly installed on the lower end of the lifting rod, the punching column is fixedly installed on the bottom of the strip ring sleeve, the driving column is inserted through the strip ring sleeve, the turntable is driven to rotate by the first motor, the turntable drives the driving column to rotate, the driving column acts on the strip ring sleeve, and drives the punching column to perform lifting and lowering actions, which is convenient for punching. Compared with punching driven by a hydraulic cylinder, this method can reduce the time of power provision, increase the punching speed, and improve the punching efficiency, which is convenient for use in large-scale punching;

[0017] 3. In the present invention, in the pressure telescopic rod, the sleeve is sleeved on the upper end of the telescopic rod, the fixing ring is fixedly installed on the inner wall of the top of the sleeve, the bottom of the fixing ring is provided with a plurality of openings in an annular array, the upper part of the opening is provided with a first inclined surface in the circumferential direction, and the lower part of the opening is provided with a protruding transverse surface, the upper end of the telescopic rod is elastically provided with a plurality of steering protrusions and engaging protrusions in an annular array, and the plurality of engaging protrusions are arranged below the plurality of steering protrusions, the top of the steering protrusion is provided with a second inclined surface in the circumferential direction, the bottom of the steering protrusion is provided with a third inclined surface in the radial direction, and the top of the engaging protrusion is provided with a fourth inclined surface in the radial direction, an upper card groove is provided on the inner wall of the top of the sleeve, and a lower card groove is provided on the inner wall of the bottom of the sleeve, when the pressure telescopic rod is in a shortened state, the telescopic rod is pushed upward, and the engaging protrusion is pushed toward the extension The lever is retracted and disengaged from the upper slot, so that the steering protrusion contacts the opening, the first inclined surface contacts the second inclined surface, the steering protrusion moves along the first inclined surface, the telescopic rod rotates, the engaging protrusion position moves from just above the upper slot to just above the lower slot, the telescopic rod is released, and the telescopic rod pops out under the action of the spring, the third inclined surface contacts the convex horizontal surface, and the steering protrusion is pushed into the inside of the telescopic rod without affecting the popping out of the telescopic rod; when the engaging protrusion reaches the position of the lower slot, the engaging protrusion pops out and engages with the lower slot, and the pressure telescopic rod is in an extended state; the above operation can be repeated to disengage the engaging protrusion from the lower slot and engage with the upper slot, so that the pressure telescopic rod is in a shortened state; through the above structural arrangement, the pressure telescopic rod can switch between the extended and shortened states by pressing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is one of the three-dimensional structural schematic diagrams of the present invention;

[0020] Figure 2 This is the second schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 3 It is one of the schematic diagrams of the cutaway structure of the present invention;

[0022] Figure 4 This is the second schematic diagram of the cutaway structure of the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the punching unit of the present invention;

[0024] Figure 6 This is one of the structural schematic diagrams of the pipe feeding unit of the present invention;

[0025] Figure 7 This is one of the structural schematic diagrams of the pipe feeding unit of the present invention;

[0026] Figure 8 This is a schematic diagram of the structure of the support member resetting unit of the present invention;

[0027] Fig. 9 It is a schematic diagram of the cutaway three-dimensional structure of the pressure telescopic rod of the present invention;

[0028] Fig.10 This is a schematic diagram of the cross-sectional structure of the pressure telescopic rod of the present invention;

[0029] Fig.11 It is a schematic diagram of the cutaway structure of the casing of the present invention.

[0030] In the figure: 1, punching unit; 101, first pipe sleeve; 102, vertical plate; 103, turntable; 104, driving column; 105, first motor; 106, horizontal plate; 107, lifting rod; 108, punching column; 109, strip ring sleeve; 2, pipe feeding unit; 201, second vertical plate; 202, second horizontal plate; 203, circular track; 204, pressure telescopic rod; 205, second motor; 206, sleeve; 207, telescopic rod; 208, Spring; 209, fixing ring; 210, opening; 211, steering protrusion; 212, engaging protrusion; 213, limiting protrusion; 214, contact block; 215, upper slot; 216, lower slot; 217, limiting slot; 3, support member reset unit; 301, second sleeve; 302, mounting bracket; 303, cylinder; 304, pushing block; 4, support member; 401, arc-shaped support plate; 402, pushing ramp; 403, groove; 5, bottom plate. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Example: Reference Figure 1-Figure 4A reciprocating punching device for metal pipes is shown, comprising a punching unit 1 and a support member 4, wherein the punching unit 1 comprises a punching column 108, wherein the punching column 108 can reciprocatingly punch the pipe, wherein the support member 4 can support the inner wall of the pipe, and further comprises a pipe feeding unit 2 and a support member resetting unit 3, wherein the pipe feeding unit 2 is fixedly connected to the punching column 108, wherein the pipe feeding unit 2 comprises an annular track 203 and a plurality of pressure telescopic rods 204, wherein the plurality of pressure telescopic rods 204 are equidistantly fixedly installed on the annular track 203, wherein the lower end of the pressure telescopic rod 204 is subjected to force to change the telescopic state, wherein one of the pressure telescopic rods 204 is in an extended state, and the telescopic end of the pressure telescopic rod 204 passes through the punching hole and contacts the support member 4, wherein the annular track 203 can periodically drive the plurality of pressure telescopic rods 204 to move a certain distance, and the support member resetting unit 3 can reciprocate the punching column 108, wherein the pipe feeding unit 2 comprises an annular track 203 and a plurality of pressure telescopic rods 204, wherein the pressure telescopic rods 204 are equidistantly fixedly installed on the annular track 203, wherein the pressure telescopic rods 204 are subjected to force to change the telescopic state, wherein the pressure telescopic rods 204 are in an extended state, and the telescopic end of the pressure telescopic rod 204 passes through the punching hole and contacts the support member 4, wherein the annular track 203 can periodically drive the plurality of pressure telescopic rods 204 to move a certain distance, and the support member resetting unit 3 can reciprocate the punching column 108, wherein the pipe feeding unit 2 comprises an annular After feeding, the support member 4 is reset. After one punching, the driving annular track 203 drives the pressure telescopic rod 204 to move. The pressure telescopic rod 204 in the extended state drives the pipe and the support member 4 to feed synchronously. One of the pressure telescopic rods 204 in the shortened state moves to the original position of the pressure telescopic rod 204 in the extended state. The support member reset unit 3 resets the support member 4, and then the next punching is carried out. The punching column 108 drives the pipe feeding unit 2 to lift and lower once. The pressure telescopic rod 204 in the extended state shortens and separates from the pipe. One of the pressure telescopic rods 204 in the shortened state lengthens and contacts with the support member 4. The above operation is repeated to ensure that the support member 4 can always support the punching part of the pipe, and there is always a pressure telescopic rod 204 in contact with the support member 4 during its movement to limit its rotation direction to prevent it from shaking or shifting, which makes subsequent punching work impossible.

[0033] Furthermore, it also includes a bottom plate 5, and the punching unit 1, the pipe feeding unit 2 and the support member resetting unit 3 are fixedly installed on the bottom plate 5 in a straight line. Figure 5As shown, the stamping unit 1 also includes a first sleeve 101, a first vertical plate 102, a turntable 103, a first motor 105, a horizontal plate 106, a lifting rod 107 and a strip ring sleeve 109, the first sleeve 101 is fixedly connected to the bottom plate 5, the first vertical plate 102 is fixedly installed on the top of the first sleeve 101, the turntable 103 is rotatably installed on one side of the first vertical plate 102, the edge of the turntable 103 is fixedly installed with a driving column 104, the first motor 105 is fixedly installed on the other side of the first vertical plate 102, the output end of the first motor 105 is inserted through the first vertical plate 102 and is fixedly connected to the turntable 103, the horizontal plate 106 is fixedly installed on the first At the top of the vertical plate 102, the lifting rod 107 is inserted through the horizontal plate 106 and is slidably connected thereto, the strip ring sleeve 109 is fixedly installed at the lower end of the lifting rod 107, and the punching column 108 is fixedly installed at the bottom of the strip ring sleeve 109. The driving column 104 is inserted through the strip ring sleeve 109, and the turntable 103 is driven to rotate by the first motor 105. The turntable 103 drives the driving column 104 to rotate, and the driving column 104 acts on the strip ring sleeve 109 to drive the punching column 108 to perform a lifting action to facilitate punching. Compared with hydraulic cylinder driven punching, this method can reduce the time of power provision, increase the punching speed, and improve the punching efficiency, which is convenient for use in large-scale punching.

[0034] Furthermore, if Figure 6 , Figure 7 As shown, the pipe feeding unit 2 includes a second vertical plate 201, a second horizontal plate 202, and a second motor 205. The second vertical plate 201 is fixedly connected to the bottom plate 5. The second horizontal plate 202 is slidably installed on one side of the second vertical plate 201. The second horizontal plate 202 is fixedly connected to the punching column 108. The annular track 203 is installed at the bottom of the second horizontal plate 202. The annular track 203 includes a fixed track, a chain and two sprockets. The fixed track is formed by staggered connection of two arc segments and two straight segments. The two sprockets are respectively installed on the two arc segments. At the center of the circle, the chain is sleeved on two sprockets and cooperates with the two sprockets. One end of the multiple pressure telescopic rods 204 is slidably connected to the fixed track and fixedly connected to the chain. The second motor 205 is driven to drive the sprocket to rotate, and the chain is driven to rotate accordingly. The chain can drive the multiple pressure telescopic rods 204 to move along the fixed track. One of the straight sections of the fixed track is directly above the pipe fitting. When one of the pressure telescopic rods 204 is in an extended state and inserted into the pipe fitting through punching, the pressure telescopic rod 204 is driven to move along the straight section, which can drive the pipe fitting to complete a feeding action.

[0035] Furthermore, if Figure 8As shown, the support member resetting unit 3 includes a second pipe sleeve 301, a mounting frame 302 and a cylinder 303. The second pipe sleeve 301 is fixedly connected to the base plate 5. The mounting frame 302 is fixedly installed on the top of the second pipe sleeve 301. The cylinder 303 is fixedly installed on the top of the mounting frame 302. A pushing block 304 is fixedly installed on the telescopic end of the cylinder 303. The bottom of the pushing block 304 is semicircular. The driving cylinder 303 can drive the pushing block 304 to move up and down. During the descent of the pushing block 304, the support member 4 can be pushed to move horizontally and reset.

[0036] Furthermore, if Figure 9-11 As shown, the pressure telescopic rod 204 includes a sleeve 206, a telescopic rod 207, a spring 208 and a fixing ring 209, one end of the spring 208 is fixedly connected to the upper end of the telescopic rod 207, the sleeve 206 is sleeved on the upper end of the telescopic rod 207, the fixing ring 209 is fixedly installed on the inner wall of the top of the sleeve 206, and the bottom of the fixing ring 209 is provided with a plurality of openings 210 in a circular array, the upper part of the opening 210 is provided with a first inclined surface in the circumferential direction, and the lower part of the opening 210 is provided with a protruding horizontal surface. The upper end of the telescopic rod 207 is elastically mounted with a plurality of steering protrusions 211 and a locking protrusion 212 in an annular array, and the plurality of locking protrusions 212 are arranged below the plurality of steering protrusions 211. The top of the steering protrusion 211 is provided with a second inclined surface in the circumferential direction, the bottom of the steering protrusion 211 is provided with a third inclined surface in the radial direction, and the top of the locking protrusion 212 is provided with a fourth inclined surface in the radial direction. The inner wall of the top of the sleeve 206 is provided with an upper groove 215, and the inner wall of the bottom of the sleeve 206 is provided with a lower groove 216. The pressure telescopic rod When the telescopic rod 204 is in the shortened state, the pressure telescopic rod 204 is pushed upward, the engaging protrusion 212 is pushed into the telescopic rod 207 and disengaged from the upper slot 215, so that the steering protrusion 211 contacts the opening 210, the first inclined surface contacts the second inclined surface, the steering protrusion 211 moves along the first inclined surface, the telescopic rod 207 rotates, the engaging protrusion 212 moves from just above the upper slot 215 to just above the lower slot 216, the telescopic rod 207 is released, and the telescopic rod 207 pops outward under the action of the spring 208, and the third inclined surface contacts the When the protruding horizontal surface is touched, the steering protrusion 211 is pushed into the inside of the telescopic rod 207 without affecting the popping out of the telescopic rod 207. When the engaging protrusion 212 reaches the position of the lower engaging groove 216, the engaging protrusion 212 pops out and engages with the lower engaging groove 216, and the pressure telescopic rod 204 is in an extended state. By repeating the above operation, the engaging protrusion 212 can be disengaged from the lower engaging groove 216 and engaged with the upper engaging groove 215, so that the pressure telescopic rod 204 is in a shortened state. Through the above structural arrangement, the pressure telescopic rod 204 can switch between the extended and shortened states by pressing.

[0037] Furthermore, a plurality of limit grooves 217 are equidistantly arranged axially on the inner wall of the lower half of the sleeve 206, a plurality of upper grooves 215 and a plurality of lower grooves 216 are staggered between two adjacent limit grooves 217, and a plurality of limit protrusions 213 are equidistantly arranged axially on the upper end of the telescopic rod 207. The limit grooves 217 cooperate with the limit protrusions 213 to limit the relative positions of the sleeve 206 and the telescopic rod 207 to prevent the turning protrusion 211 from detaching from the opening 210. The engaging protrusion 212 is neither directly above the upper groove 215 nor directly above the lower groove 216, thereby preventing the telescopic rod 207 from detaching from the sleeve 206.

[0038] Furthermore, a groove 403 is provided on the top of the support member 4, and a contact block 214 is installed on the lower end of the telescopic rod 207 through a damping shaft. The width of the contact block 214 is the same as that of the groove 403, and a roller is rotatably installed on the bottom of the contact block 214. The contact block 214 cooperates with the groove 403 to ensure that the support member 4 will only move axially during the movement, and will not move radially and circumferentially, thereby avoiding affecting the subsequent punching work. The contact block 214 is installed using the damping shaft to ensure that the contact block 214 is not easy to rotate relative to the telescopic rod 207 under normal conditions, thereby avoiding affecting the insertion of the contact block 214 into the groove 403. During punching, the pipe feeding unit 2 descends, the telescopic rod 207 moves into the sleeve 206, the telescopic rod 207 rotates, and the contact block 214 remains stationary under the action of the groove 403. The contact block 214 can rotate relative to the telescopic rod 207, thereby avoiding affecting the telescopic switching action of the pressure telescopic rod 204.

[0039] Furthermore, an arc-shaped support plate 401 is fixedly installed at one end of the support member 4, a circular hole is provided on the top of the arc-shaped support plate 401, and a debris groove is provided at one end of the support member 4, and the debris groove is arranged directly below the circular hole. A pushing slope 402 is provided at the other end of the support member 4. The debris generated during the punching process will fall into the debris groove through the circular hole, which is convenient for collecting the debris. The pushing block 304 contacts the top of the pushing slope 402 and applies a downward force to it, which can push the support member 4 to reset.

[0040] Furthermore, a plurality of balls are evenly and rotatably mounted on the arc surface at the bottom of the support member 4 , thereby reducing the friction between the bottom of the support member 4 and the inner wall of the pipe, and facilitating the support member resetting unit 3 to push the support member 4 .

[0041] Working principle:

[0042] When the present invention starts working, one end of the metal pipe is placed in the first pipe sleeve 101, and the first motor 105 is driven to drive the turntable 103 to rotate. The driving column 104 rotates with the turntable 103 and moves downward from the highest position. The driving column 104 drives the strip ring sleeve 109 to move downward, and the strip ring sleeve 109 drives the punching column 108 to move downward. The punching column 108 punches the metal pipe. The driving column 104 reaches the lowest position, and the first motor 105 continues to drive the turntable 103 to rotate. The driving column 104 moves upward from the lowest position, driving the punching column 108 to rise to the initial position, completing a punching. After the first hole is punched, stop the first motor 105, use external force to push the metal pipe forward a specific length, insert one end of the support member 4 into one end of the metal pipe, so that the circular hole on the arc-shaped support plate 401 is directly below the punching column 108. At this time, refer to Figure 3 The positions of the components in the figure are viewed from a perspective perpendicular to the metal pipe. The pressure telescopic rod 204 on the left side of the inner side is pressed to make it extend into the groove 403. Then, the first motor 105 is started again to drive the punching column 108 to perform a reciprocating motion to complete the second punching. At the same time, the pipe feeding unit 2 is driven to complete a reciprocating motion. The two pressure telescopic rods 204 on the left and right sides of the inner side both contact the support member 4 and are squeezed. The pressure telescopic rod 204 on the left side of the inner side is retracted, and the pressure telescopic rod 204 on the right side of the inner side is extended ( Figure 3 ), and the inner right pressure telescopic rod 204 passes through the first punched hole and extends into the groove 403, driving the second motor 205 to drive the annular track 203 to rotate a specific distance, the inner right pressure telescopic rod 204 moves to the position of the inner left pressure telescopic rod 204, and drives the metal pipe to feed a specific distance, and the support member 4 also moves a specific distance with the metal pipe, the inner left pressure telescopic rod 204 moves to the position of the outer left pressure telescopic rod 204, and the outer right pressure telescopic rod 204 moves to the position of the inner right pressure telescopic rod 204. At this time, the side with a higher position of the push inclined surface 402 moves to the right below the push block 304, the telescopic end of the driving cylinder 303 extends, the push block 304 descends to contact the push inclined surface 402 and presses down, and the support member 4 moves relative to the pressure telescopic rod 204 and the metal pipe under its action until it is reset, and then the first motor 105 is started again, and the above actions are repeated to complete the continuous punching of the metal pipe.

[0043] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A reciprocating punching device for metal pipe fittings, comprising a punching unit (1) and a support member (4), wherein the punching unit (1) comprises a punching column (108), wherein the punching column (108) is capable of reciprocatingly punching the pipe fitting, and the support member (4) is capable of supporting the inner wall of the pipe fitting, characterized in that: The invention also comprises a pipe feeding unit (2) and a support member resetting unit (3), wherein the pipe feeding unit (2) is fixedly connected to the punching column (108), the pipe feeding unit (2) comprises an annular track (203) and a plurality of pressure telescopic rods (204), the plurality of pressure telescopic rods (204) being fixedly installed on the annular track (203) at equal intervals, the pressure telescopic rods (204) comprising a sleeve (206), a telescopic rod (207), a spring (208) and a fixing ring (209), one end of the spring (208) being fixedly connected to the upper end of the telescopic rod (207), the sleeve (206) being sleeved on the upper end of the telescopic rod (207), the fixing ring (209) being fixedly installed on the inner wall at the top of the sleeve (206), and the fixing ring (209) being fixedly installed on the inner wall at the top of the sleeve (206). 09) has a plurality of openings (210) in an annular array at the bottom, a first inclined surface is circumferentially provided above the opening (210), a protruding transverse surface is provided below the opening (210), a plurality of steering protrusions (211) and locking protrusions (212) are elastically mounted in an annular array on the upper end of the telescopic rod (207), the lower end of the pressure telescopic rod (204) is subjected to force to change the telescopic state, one of the pressure telescopic rods (204) is in an extended state, and the telescopic end of the pressure telescopic rod (204) contacts the support member (4) through the punching hole, the annular track (203) can periodically drive the plurality of pressure telescopic rods (204) to move a certain distance, and the support member reset unit (3) can reset the support member (4) after feeding; The invention also comprises a bottom plate (5), wherein the punching unit (1), the pipe feeding unit (2) and the support member resetting unit (3) are fixedly mounted on the bottom plate (5) in sequence in a straight line, wherein the support member resetting unit (3) comprises a second pipe sleeve (301), a mounting frame (302) and a cylinder (303), wherein the second pipe sleeve (301) is fixedly connected to the bottom plate (5), the mounting frame (302) is fixedly mounted on the top of the second pipe sleeve (301), and the cylinder (303) is fixedly mounted on the top of the mounting frame (302), and a pushing block (304) is fixedly mounted on the telescopic end of the cylinder (303), and the bottom of the pushing block (304) is arranged in a semicircular shape.

2. A reciprocating punching device for metal pipes according to claim 1, characterized in that: The punching unit (1) further comprises a first sleeve (101), a first vertical plate (102), a rotating disk (103), a first motor (105), a horizontal plate (106), a lifting rod (107) and a strip ring sleeve (109); the first sleeve (101) is fixedly connected to the bottom plate (5); the first vertical plate (102) is fixedly mounted on the top of the first sleeve (101); the rotating disk (103) is rotatably mounted on one side of the first vertical plate (102); a driving column (104) is fixedly mounted on the edge of the rotating disk (103); and the first motor (105) is fixedly mounted on the bottom plate (5). The first motor (105) is fixedly mounted on the other side of the first vertical plate (102); the output end of the first motor (105) passes through the first vertical plate (102) and is fixedly connected to the turntable (103); the horizontal plate (106) is fixedly mounted on the top of the first vertical plate (102); the lifting rod (107) passes through the horizontal plate (106) and is slidably connected thereto; the strip ring sleeve (109) is fixedly mounted on the lower end of the lifting rod (107); the punching column (108) is fixedly mounted on the bottom of the strip ring sleeve (109); and the driving column (104) passes through the strip ring sleeve (109).

3. A metal pipe reciprocating punching device according to claim 1, characterized in that: The pipe feeding unit (2) comprises a second vertical plate (201), a second horizontal plate (202) and a second motor (205); the second vertical plate (201) is fixedly connected to the bottom plate (5); the second horizontal plate (202) is slidably mounted on one side of the second vertical plate (201); the second horizontal plate (202) is fixedly connected to the punching column (108); the annular track (203) is mounted on the bottom of the second horizontal plate (202); the annular track (203) comprises a fixed track, a chain and two sprockets; the fixed track is formed by two arc segments and two straight segments being staggered and connected; the two sprockets are respectively mounted at the centers of the two arc segments; the chain is sleeved on the two sprockets and cooperates with the two sprockets; one end of the plurality of pressure telescopic rods (204) is slidably connected to the fixed track and fixedly connected to the chain.

4. A metal pipe reciprocating punching device according to claim 1, characterized in that: The plurality of engaging protrusions (212) are arranged below the plurality of steering protrusions (211); a second inclined surface is circumferentially provided at the top of the steering protrusion (211); a third inclined surface is radially provided at the bottom of the steering protrusion (211); a fourth inclined surface is radially provided at the top of the engaging protrusion (212); an upper engaging groove (215) is provided on the inner wall of the top of the sleeve (206); and a lower engaging groove (216) is provided on the inner wall of the bottom of the sleeve (206).

5. A metal pipe reciprocating punching device according to claim 4, characterized in that: A plurality of limit grooves (217) are equidistantly arranged axially on the inner wall of the lower half of the sleeve (206); a plurality of upper clamping grooves (215) and a plurality of lower clamping grooves (216) are staggered between two adjacent limit grooves (217); and a plurality of limit protrusions (213) are equidistantly arranged axially on the upper end of the telescopic rod (207).

6. A metal pipe reciprocating punching device according to claim 4, characterized in that: A groove (403) is provided at the top of the support member (4), a contact block (214) is fixedly mounted at the lower end of the telescopic rod (207), the width of the contact block (214) is the same as that of the groove (403), and a roller is rotatably mounted at the bottom of the contact block (214).

7. A metal pipe reciprocating punching device according to claim 1, characterized in that: An arc-shaped support plate (401) is fixedly mounted on one end of the support member (4), a circular hole is provided on the top of the arc-shaped support plate (401), a debris groove is provided on one end of the support member (4), the debris groove is arranged directly below the circular hole, and a pushing inclined surface (402) is provided on the other end of the support member.

8. The metal pipe reciprocating punching device according to claim 1, characterized in that: A plurality of balls are evenly and rotatably mounted on the arc-shaped surface at the bottom of the support member (4).

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