Punching device for edge pressing of bent pipe

Abstract

The invention relates to the field of combined machining of pipe punching and pipe end edge folding, in particular to a punching device for bent pipe edge pressing, which comprises a punching machine tool, and further comprises a Z-axis punch and a Y-axis punch which are arranged on the punching machine tool, the cross beam is arranged in the X-axis direction, the tool arranging mechanism linearly moves along the cross beam and comprises a tool arranging plate and die cores, the die cores are inserted side by side on the tool arranging plate along the Y axis, an expansion sleeve is hung on the cross beam through a support, and a Y-axis punch pushes the die cores to be inserted into the expansion sleeve. According to the punching device for the bent pipe blank pressing, the die cores of different sizes are preassembled, and the positions of the die cores are rapidly switched, so that the working efficiency far higher than that of manual die replacement and debugging equipment is achieved, and the problem that products of various specifications cannot be machined in a compatible mode due to the single die size can be solved; and the die needs to be replaced together with the production specification, so that the production efficiency is not improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pipe punching and pipe end flanging combined processing, in particular to a punching device for bending pipe edge pressing. BACKGROUND

[0002] When using a bent pipe as a connecting piece, a circular pipe with more uniform stress is generally selected, punching in the pipe wall of the pipe head can be used for assembling bolts, and extruding the circular pipe head into a square shape can also make the angle positioning of the plug-in assembly more convenient and the connection more stable.

[0003] The current mainstream edge pressing and punching equipment needs to support the mold inserted into the pipe head for support shaping, and cooperate with the external pressure device to complete the edge pressing and punching. Since the size of the mold is single, a mold of one size can only correspond to the production of one product specification, so when the factory changes the product specification, the corresponding mold also needs to be replaced. The replacement of the mold needs to be debugged, positioned and tested, and the whole replacement process has a significant impact on the production efficiency of the factory. Therefore, in order to solve the problem that the single mold size cannot be compatible with the processing of multiple specifications of products, resulting in the mold needing to be replaced with the production specification, which is not conducive to production efficiency, a punching device for bending pipe edge pressing is proposed. SUMMARY

[0004] In view of the above or the problem in the prior art that the single mold size cannot be compatible with the processing of multiple specifications of products, resulting in the mold needing to be replaced with the production specification, which is not conducive to production efficiency, the present application is proposed.

[0005] Therefore, the purpose of the present application is to provide a punching device for bending pipe edge pressing.

[0006] To solve the above technical problems, the present application provides the following technical scheme: a punching device for bending pipe edge pressing, comprising a punching machine tool, further comprising: a Z-axis punch and a Y-axis punch arranged on the punching machine tool; a cross beam arranged along the X-axis direction, a row cutter mechanism linearly moving along the cross beam, comprising a row cutter plate and a mold core inserted side by side along the Y-axis, the cross beam is provided with a support, and an expansion sleeve is hung through the support, and the Y-axis punch pushes the mold core to insert the expansion sleeve, so that the expansion sleeve expands in the end of the bent pipe, and the profile of the end of the bent pipe is pre-formed, and the outer wall of the expansion sleeve is parallelly provided with a pressing plate for edge forming; the expansion sleeve is a rigid metal material with elasticity, and the side wall of the expansion sleeve is wave-shaped and hollow with a reed, and the mold core cooperates with the expansion sleeve to open a mold hole in the axial direction of the Z-axis punch.

[0007] As a preferred scheme of the punching device for bending pipe edge pressing of the present application, wherein: the cross beam is fixed with a guide rail along the X-axis direction, the row cutter plate is slidingly connected with the guide rail, and the row cutter plate is fixed with a row cutter frame side by side, and the row cutter frame is used for storing and positioning the mold core.

[0008] As a preferred scheme of the punch device for bending pipe edge of the present application, wherein: the row cutter holder is made of thin-walled metal square tube, and the four side walls are punched inward to form elastic pressing pieces, which support the mold core from different directions and position the mold core of different sizes in the middle of the row cutter holder.

[0009] As a preferred scheme of the punch device for bending pipe edge of the present application, wherein: the mold core is provided with a insertion hole along the axial direction of the end away from the expansion sleeve, and the bottom surface of the mold core is provided with a notch communicating with the insertion hole, and a clamping block is rotatably connected in the notch, the end of the Y-axis punch is larger in diameter than the rod connected to the end, the clamping block is buckled at the step between the end of the Y-axis punch and the rod, and the end of the Y-axis punch is inserted and matched with the insertion hole.

[0010] As a preferred scheme of the punch device for bending pipe edge of the present application, wherein: the bottom surface of the row cutter holder is upwardly punched to form a push piece, and the push piece is slidingly connected with the notch, the mold core abuts against the push piece to position the insertion depth of the mold core into the row cutter holder, the top end of the push piece abuts against the clamping block to make it deflect, thereby controlling the engagement and disengagement of the clamping block and the Y-axis punch, and a spring is arranged between the clamping block and the bottom of the notch to provide a pre-tightening force for buckling and inserting the Y-axis punch.

[0011] As a preferred scheme of the punch device for bending pipe edge of the present application, wherein: when the mold core abuts against the push piece, the deflection axis of the clamping block is located between the push piece and the opening of the insertion hole, and the height of the end of the clamping block abutting against the push piece is higher than the end located at the opening of the insertion hole.

[0012] As a preferred scheme of the punch device for bending pipe edge of the present application, wherein: the four edges of the expansion sleeve extend four "L"-shaped edge strips towards the support, the short edges of the "L"-shaped edge strips located on the same side of the expansion sleeve are arranged in opposite directions, the support is "concave"-shaped and is sleeved on both sides of the expansion sleeve, and the short edges of the "L"-shaped edge strips are hung on the support along the Y-axis direction.

[0013] As a preferred scheme of the punch device for bending pipe edge of the present application, wherein: the support extends a partition between the short edges on both sides of the expansion sleeve, the short edges of the "L"-shaped edge strips are elastically sleeved with a short column one, and the short column one perpendicularly abuts against the partition, the top end surface of the expansion sleeve is provided with an adjusting screw one along the axis of the short column one, for pressing the elastic member to adjust the expansion sleeve relative to the support along the Z-axis direction, and the short edges of the "L"-shaped edge strips and the vertical surface of the support are also perpendicularly and elastically abutted with a short column two, and the outer walls on both sides of the support are provided with an adjusting screw two along the axis of the short column two, for pressing the elastic member to adjust the expansion sleeve relative to the support along the X-axis direction.

[0014] As a preferred scheme of the punch device for bending pipe edge of the present application, wherein: the pressing plate corresponding to the Z-axis punch is fixedly connected with the Z-axis punch vertically, and the punch pin is fixed on the pressing plate corresponding to the die hole, and the pressing plate outside the Z-axis punch is connected with the air cylinder, and the air cylinder shell is fixedly connected with the cross beam.

[0015] As a preferred scheme of the punch device for bending pipe edge of the present application, wherein: one side of the row cutter plate is fixedly pressed with a synchronous belt, the synchronous belt is parallel to the guide rail, and is used to control the position coordinate of the row cutter plate on the X-axis, and the punch press machine tool is also equipped with a flexible welding platform for placing and positioning the bending pipe.

[0016] The punch device for bending pipe edge of the present application has the following beneficial effects: The punch device for bending pipe edge of the present application can realize the work efficiency far exceeding the manual replacement and debugging of the mold equipment by preassembling the die cores of different sizes and quickly switching the positions, and can solve the problem that the single mold size cannot be compatible with the processing of multiple specifications, so that the mold needs to be replaced together with the production specifications, which is not conducive to the production efficiency. The punch device for bending pipe edge of the present application can flexibly adjust the side length of the square pipe opening through the elastic structure on the four walls of the expansion sleeve, and quickly meet the different processing specification requirements through the die cores of different sizes inserted into the expansion sleeve, so as to meet the fixing requirements of the bending pipe workpiece without friction and scratching the inner wall of the bending pipe workpiece. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 It is a device structure schematic diagram of the punch device for bending pipe edge.

[0019] Figure 2 It is Figure 1 It is a structure enlarged view of A in the middle.

[0020] Figure 3 It is Figure 2 It is a structure schematic diagram of the structure shown in another view.

[0021] Figure 4 It is a structure schematic diagram of the row cutter mechanism.

[0022] Figure 5 It is an assembly structure sectional view between the row cutter plate, the row cutter frame and the die core.

[0023] Figure 6 Assemble structure between row cutter frame and mold core (mold core and row cutter frame are assembled in place).

[0024] Figure 7 Assemble structure between row cutter frame and mold core (mold core and row cutter frame are assembled in place). Figure 6 Structure enlargement at B.

[0025] Figure 8 Assemble structure between row cutter frame and mold core (mold core and row cutter frame are assembled in place).

[0026] Figure 9 Assemble structure between row cutter frame and mold core (mold core and row cutter frame are assembled in place). Figure 8 Structure enlargement at C.

[0027] Figure 10 Assemble structure between row cutter frame and mold core (mold core and row cutter frame are assembled in place).

[0028] Figure 11 Assemble structure between row cutter frame and mold core (mold core and row cutter frame are assembled in place). Figure 10 Structure schematic diagram after partial section at screw one and screw two.

[0029] Figure 12 Structure exploded view between expansion sleeve, mold core, Y-axis punch and preformed elbow end.

[0030] In the figure: 100, punch machine tool; 101, Z-axis punch; 102, Y-axis punch; 103, cross beam; 104, guide rail; 105, support; 1051, partition; 1052, short column two; 1053, screw two; 106, synchronous belt; 107, flexible welding platform; 200, row cutter mechanism; 201, row cutter plate; 202, row cutter frame; 2021, pressing piece; 2022, pushing piece; 203, mold core; 2031, mold hole; 2032, insertion hole; 2033, notch; 204, clamping block; 205, spring; 300, expansion sleeve; 3001, spring piece; 3002, edge strip; 3003, short column one; 3004, screw one; 400, pressing plate; 4001, punch pin; 401, air cylinder. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0032] Embodiment, refer to Figures 1-12 The embodiment provides a punching device for elbow pipe edge pressing, which can realize quick switching to different size molds and saves the disassembly, assembly and debugging time of manual mold replacement.

[0033] As Figure 1As shown, it includes a stamping machine 100, which is also equipped with a flexible welding platform 107 for placing and positioning the bent pipe. The bent pipe to be processed is placed on the flexible welding platform 107 for processing.

[0034] First, it should be noted that the directions of the Z-axis, X-axis, and Y-axis mentioned in this article all follow the general definition of machine tool movement direction in the machining industry, that is, when the operator faces the machine tool, the Z-axis is vertical up and down, the X-axis is horizontal left and right, and the Y-axis is horizontal forward and backward, and the Z-axis, X-axis, and Y-axis are perpendicular to each other.

[0035] The stamping machine tool 100 is also equipped with: reference Figure 2 Z-axis punch 101 and Y-axis punch 102 are located on the stamping machine 100; Reference Figure 4 A crossbeam 103 is arranged along the X-axis, and a tool-distributing mechanism 200 moves linearly along the crossbeam 103. The tool-distributing mechanism 200 includes a tool-distributing plate 201 and mold cores 203 arranged side-by-side along the Y-axis on the tool-distributing plate 201. (See reference...) Figure 10 An expansion sleeve 300 is mounted on the crossbeam 103 via a bracket 105, and the Y-axis punch 102 pushes the die core 203 to insert the expansion sleeve 300, causing it to expand inside the end of the bent pipe, thereby pre-forming the contour of the end of the bent pipe. (Refer to...) Figure 3 The expansion sleeve 300 has a pressure plate 400 for edge pressing and forming arranged parallel to its outer wall. (Refer to...) Figure 12 The expansion sleeve 300 is made of a rigid metal material with elasticity, and the side walls of the expansion sleeve 300 are all perforated with wave-shaped spring plates 3001. (See reference) Figure 3 and Figure 12 The pressure plate 400 corresponding to the Z-axis punch 101 is vertically fixed to the Z-axis punch 101, and the pressure plate 400 is fixed with a punch 4001 corresponding to the die hole 2031. The die core 203 cooperates with the expansion sleeve 300 to open the die hole 2031 in the axial direction of the Z-axis punch 101. All pressure plates 400 outside the Z-axis punch 101 are connected to cylinders 401, and the housing of the cylinder 401 is fixedly connected to the crossbeam 103.

[0036] The aforementioned stamping machine 100 uses a high-rigidity crossbeam 103 as its structural foundation. By mounting a cutter plate 201, the machine can simultaneously load multiple die cores 203 of different sizes. These die cores 203 switch positions as the cutter plate 201 moves. After aligning the required die core 203 with the expansion sleeve 300, the Y-axis punch 102 pushes the die core 203 into the expansion sleeve 300, causing the expansion sleeve 300 to expand within the cylindrical tube. Subsequently, the four edges of the expansion sleeve 300 abut against the inner wall of the cylindrical tube, further tightening the inner wall and finally expanding the cylindrical tube to reveal its four edges. (See reference...) Figure 10, and the four outer wall surfaces of the round pipe are pressed once to complete the forming, and the reserved mold hole 2031 of the mold core 203 is used to complete the punching.

[0037] In the above process, the bent pipe workpiece does not need other fastening measures, because the mold core 203 is not directly inserted into the pipe head, the mold core 203 only rubs with the expansion sleeve 300, the expansion sleeve 300 is fixed relative to the position of the bent pipe workpiece, and the expansion sleeve 300 is tightly supported after expansion, which also plays a firm positioning and fixing role.

[0038] Therefore, the punching device for the bent pipe edge pressing of the application can flexibly adjust the edge length of the square pipe opening through the elastic structure on the four walls of the expansion sleeve 300, and quickly form different processing specifications by inserting the mold core 203 of different sizes into the expansion sleeve 300, while meeting the fixing requirements of the bent pipe workpiece, and not rubbing and scratching the inner wall of the bent pipe workpiece. The application also has the advantages that the different sizes of the mold core 203 can be preassembled and the position can be quickly switched, the working efficiency of manually replacing and debugging the mold equipment is far exceeded, and the problem that the single mold size cannot be compatible with the processing of multiple specifications, resulting in the need to replace the mold together with the production specifications, which is not conducive to production efficiency, can be solved.

[0039] The application also relates to the following technical details: Firstly, the movement of the cutter arranging mechanism 200; Referring to Figure 4 It can be seen that the main assembly structure of the cutter arranging mechanism 200 is that the guide rail 104 is fixed on the cross beam 103 along the X-axis direction, the cutter arranging plate 201 is slidably connected with the guide rail 104, the cutter arranging plate 201 is fixed and pressed on one side with the synchronous belt 106, the synchronous belt 106 is parallel to the guide rail 104, and is used for controlling the position coordinates of the cutter arranging plate 201 on the X-axis, the cutter arranging plate 201 is fixed with the cutter arranging frame 202 in parallel, the cutter arranging frame 202 is used for storing and positioning the mold core 203, the synchronous belt 106 can be wound around the synchronous wheel, and is driven by the servo motor, so that the cutter arranging plate 201 and the mold core 203 are accurately positioned. Referring to Figure 5 The cutter arranging frame 202 is made of a thin-walled metal square tube, the four side walls are all inwardly punched to have elastic pressing pieces 2021, the pressing pieces 2021 support the mold core 203 from different directions and position the mold core 203 in the middle of the cutter arranging frame 202, so that the application can not only preassemble multiple mold cores 203, but also directly insert the mold core 203 into the cutter arranging frame 202 when refilling the mold core 203, and the multiple pressing pieces 2021 on the inner wall of the cutter arranging frame 202 position the mold core 203 in the middle of the cutter arranging frame 202 by symmetrically extruding the four outer walls of the mold core 203, thereby saving the trouble of debugging. And, referring to Figure 9, when the mold core 203 abuts against the push piece 2022, the deflection axis of the clamping block 204 is located between the push piece 2022 and the opening of the insertion hole 2032, and at this time, the height of the end of the bottom surface of the clamping block 204 abutting against the push piece 2022 is higher than that of the end located at the opening of the insertion hole 2032. It can be seen that the bottom surface of the clamping block 204 is like a seesaw, when the mold core 203 is inserted in place, the push piece 2022 on the bottom surface of the row cutter holder 202 slides from one end of the bottom surface of the clamping block 204 to the other end through elastic deformation, and then the push piece 2022 elastically deforms to restore inside the slot 2033 of the mold core 203, and one end of the clamping block 204 is lifted up. Since the push piece 2022 needs to be bent when sliding through the axis of the clamping block 204, a pre-tightening force can be provided to prevent the mold core 203 from falling off during equipment operation; Reference Figures 5-9 It can be seen that how the mold core 203 moves away from the row cutter holder 202 with the Y-axis punch 102, and how the mold core 203 returns to the zero position of the row cutter holder 202 with the Y-axis punch 102. The end of the mold core 203 away from the expansion sleeve 300 is provided with an insertion hole 2032 along the axial direction thereof, and the bottom surface of the mold core 203 is provided with a slot 2033 communicating with the insertion hole 2032, and the slot 2033 is rotatably connected with a clamping block 204. The diameter of the end of the Y-axis punch 102 is greater than the diameter of the rod connected to the end, the clamping block 204 is buckled at the step between the end of the Y-axis punch 102 and the rod portion thereof, and the end of the Y-axis punch 102 is inserted and matched with the insertion hole 2032. The bottom surface of the row cutter holder 202 is upwardly stamped with a push piece 2022, and the push piece 2022 is slidingly connected with the slot 2033. The mold core 203 abuts against the push piece 2022 to position the insertion depth of the mold core 203 into the row cutter holder 202. The top end of the push piece 2022 abuts against and pushes the clamping block 204 to make it deflect, thereby controlling the engagement and disengagement of the clamping block 204 and the Y-axis punch 102. The clamping block 204 abuts against the bottom of the slot 2033 with a spring 205 therebetween, and the spring 205 provides a pre-tightening force for the buckling of the clamping block and the Y-axis punch 102. The above is described step by step. Step one, refer to Figure 6 and Figure 7 The mold core 203 is inserted into the row cutter holder 202 to the position, which is considered as the zero position. The Y-axis punch 102 enters the insertion hole 2032 to push the mold core 203. At this time, due to the push piece 2022 pushing one end of the clamping block 204 upward, the other end of the clamping block 204 is received inside the slot 2033, and the clamping block 204 is not hung on the step of the end of the Y-axis punch. Step two, refer to Figure 8 and Figure 9, Y-axis punch 102 continues to move, push the mold core 203, the elastic deformation of the tab 2022 allows the mold core 203 and its inner block 204 slip out, the block 204 after the control of the tab 2022 is separated, under the push of the spring 205, the block 204 is connected with the step at the end of the Y-axis, at this time the mold core 203 is fixed with the Y-axis punch 102, and advances and retreats synchronously with the Y-axis punch 102. It should be noted that although the Y-axis punch 102 is circular, the front end of the mold core 203 has entered the expansion sleeve 300 before it is completely separated from the tool holder 202, so as to avoid accidental deflection; Secondly, the assembly and adjustment of the expansion sleeve 300, and the cooperation between the expansion sleeve 300 and the mold core 203: Reference Figure 10 And Figure 11 , the four edges of the expansion sleeve 300 extend four "L" shaped edges 3002 towards the support 105, the two edges 3002 on the same side of the expansion sleeve 300 are arranged in opposite directions, the support 105 is "concave" shaped and connected to the two sides of the expansion sleeve 300, and the "L" shaped short edges of the edges 3002 are connected to the support 105 along the Y-axis direction, the support 105 extends a partition 1051 between the short edges of the two sides of the expansion sleeve 300, the "L" shaped short edges of the edges 3002 are elastically connected with a short column one 3003, and the short column one 3003 is perpendicular to the partition 1051, the top surface of the expansion sleeve 300 is provided with an adjusting screw one 3004 along the short column axis, for extruding the elastic member to adjust the expansion sleeve 300 along the Z-axis direction relative to the support 105, the edges 3002 and the vertical surface of the support 105 are also vertically and elastically in contact with a short column two 1052, and the two sides of the support 105 are provided with an adjusting screw two 1053 along the axis of the short column two 1052, for extruding the elastic member to adjust the expansion sleeve 300 relative to the support 105 along the X-axis direction; In the above structure, when the mold core 203 is inserted into the expansion sleeve 300, the "L" shaped short edges are connected with the thick support 105 to prevent the expansion sleeve 300 from moving forward with the mold core 203, and the up and down and left and right positions of the expansion sleeve 300 are adjusted by the elastic support of the short column one 3003 and the short column two 1052 between the support 105 and the expansion sleeve 300, if the screw one 3004 is rotated downward, the pushing force of the short column above the partition 1051 on the partition 1051 is increased, and the position of the expansion sleeve 300 is adjusted upward, and vice versa, the position of the expansion sleeve 300 is adjusted downward, and similarly, the screw two 1053 on one side of the support 105 is screwed into the support 105, and the screw two 1053 on the other side of the support 105 is loosened, and the position of the expansion sleeve 300 is adjusted to the side where the screw is screwed into the support 105; From the above adjustment mode, it can be seen that the expansion sleeve 300 is not directly rigidly fastened with the support 105, but a soft connection mode with floating effect up and down and left and right. Thanks to the working mode of the mold core 203 and the expansion sleeve 300, it does not interfere with the work of the expansion sleeve 300, but provides a certain fault tolerance range for the position alignment before the mold core 203 is inserted into the expansion sleeve 300, so that the device can run easily and smoothly.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A punching device for bending and pressing pipe edges, comprising a punching machine (100), characterized in that, Also includes: Z-axis punch (101) and Y-axis punch (102) are provided on the stamping machine (100). A crossbeam (103) is arranged along the X-axis, and a knife-distribution mechanism (200) moves linearly along the crossbeam (103). The mechanism includes a knife-distribution plate (201) and a mold core (203) inserted side by side along the Y-axis on the crossbeam (103). The crossbeam (103) is provided with a bracket (105), and an expansion sleeve (300) is hung on the bracket (105). The Y-axis punch (102) pushes the mold core (203) to insert the expansion sleeve (300), so that it expands in the end of the bend and thus pre-forms the contour of the end of the bend. A pressure plate (400) for pressing and forming is arranged parallel to the outer wall of the expansion sleeve (300). The expansion sleeve (300) is made of a rigid metal material with elasticity, and the side walls of the expansion sleeve (300) are all hollowed out with spring plates (3001). The mold core (203) is provided with a mold hole (2031) in the axial direction of the Z-axis punch (101) in conjunction with the expansion sleeve (300).

2. The punching device for bending and pressing pipes as described in claim 1, characterized in that: A guide rail (104) is fixed on the crossbeam (103) along the X-axis direction. The blade plate (201) is slidably connected to the guide rail (104). A blade holder (202) is fixed in parallel on the blade plate (201). The blade holder (202) is used for storing and positioning the mold core (203).

3. The punching device for bending and pressing pipes as described in claim 2, characterized in that: The blade holder (202) is made of thin-walled metal square tube, and its four side walls are all stamped inward to obtain elastic pressure plates (2021). The pressure plates (2021) support the mold cores (203) from different directions and position the mold cores (203) of different sizes in the middle of the blade holder (202).

4. The punching device for bending and pressing pipes as described in claim 3, characterized in that: The mold core (203) has an insertion hole (2032) at one end away from the expansion sleeve (300) along its axial direction. The bottom surface of the mold core (203) is connected to the insertion hole (2032) and has a slot (2033). A locking block (204) is rotatably connected in the slot (2033). The end diameter of the Y-axis punch (102) is larger than the diameter of the rod at its connecting end. The locking block (204) is fastened to the step between the end of the Y-axis punch (102) and its rod. The end of the Y-axis punch (102) is inserted and matched with the insertion hole (2032).

5. The punching device for bending and pressing pipes as described in claim 4, characterized in that: The bottom surface of the cutter holder (202) is stamped with a paddle (2022), and the paddle (2022) is slidably connected to the slot (2033). The mold core (203) abuts against the paddle (2022) to position the depth of the mold core (203) inserted into the cutter holder (202). The top of the paddle (2022) abuts against the push block (204) to deflect it, controlling the engagement and disengagement of the block (204) and the Y-axis punch (102). A spring (205) abuts between the block (204) and the bottom of the slot (2033). The spring (205) provides the preload force for the buckle and the Y-axis punch (102) to engage.

6. The punching device for bending and pressing pipes as described in claim 5, characterized in that: When the mold core (203) abuts against the lever (2022), the deflection axis of the block (204) is located between the lever (2022) and the opening of the socket (2032), and at this time, the height of the end of the bottom surface of the block (204) that abuts against the lever (2022) is higher than the end located at the opening of the socket (2032).

7. The punching device for bending and pressing pipes as described in claim 1, characterized in that: The four edges of the expansion sleeve (300) extend into four "L"-shaped side strips (3002) towards the bracket (105). The two side strips (3002) on the same side of the expansion sleeve (300) have their short "L"-shaped sides facing each other. The bracket (105) is fitted into both sides of the expansion sleeve (300) in a "U" shape, and the short "L"-shaped side of the side strips (3002) is hooked to the bracket (105) along the Y-axis.

8. The punching device for bending and pressing pipes as described in claim 7, characterized in that: The bracket (105) extends into the gap between the short sides of the expansion sleeve (300) on both sides with a partition (1051). The "L"-shaped short sides of the side strip (3002) are elastically fitted with short posts (3003), and the short posts (3003) perpendicularly abut against the partition (1051). The top surface of the expansion sleeve (300) is provided with an adjusting screw (3004) along the axis of the short posts, which is used to squeeze the elastic element so that the expansion sleeve (300) is adjusted relative to the bracket (105) in the Z-axis direction. The side strip (3002) and the vertical surface of the bracket (105) are also provided with a short post (1052) perpendicularly and elastically abutting against each other. The outer walls on both sides of the bracket (105) are provided with adjusting screws (1053) along the axis of the short post (1052), which are used to squeeze the elastic element so that the expansion sleeve (300) is adjusted relative to the bracket (105) in the X-axis direction.

9. The punching device for bending and pressing pipes as described in claim 1, characterized in that: The pressure plate (400) corresponding to the Z-axis punch (101) is vertically fixed to the Z-axis punch (101), and the pressure plate (400) is fixed with a punch (4001) corresponding to the die hole (2031). All pressure plates (400) other than the Z-axis punch (101) are connected to cylinders (401), and the housing of the cylinder (401) is fixedly connected to the crossbeam (103).

10. The punching device for bending and pressing pipes as described in claim 1, characterized in that: A timing belt (106) is fixedly pressed on one side of the blade plate (201). The timing belt (106) is parallel to the guide rail (104) and is used to control the position coordinates of the blade plate (201) on the X-axis. The stamping machine (100) is also equipped with a flexible welding platform (107) for placing and positioning the bent pipe.

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