A piercing device for bending and edge-pressing

Abstract

The present application relates to the field of pipe punching and pipe end flanging combined processing, and particularly relates to a punching device for elbow pipe edge pressing, which comprises a punching machine tool, further comprises: a Z-axis punch and a Y-axis punch arranged on the punching machine tool; a cross beam arranged along an X-axis direction; a row cutter mechanism linearly moving along the cross beam, which comprises a row cutter plate and a mold core on which mold cores are inserted side by side along the Y-axis; an expansion sleeve is hung on the cross beam through a support, and the Y-axis punch pushes the mold core to insert the expansion sleeve. The punching device for elbow pipe edge pressing can realize work efficiency far exceeding manual replacement and adjustment of mold equipment by pre-installing mold cores of different sizes and quickly switching the positions of the mold cores, and can solve the problem that the single size of the mold cannot be compatible with the processing of products of multiple specifications, so that the mold needs to be replaced together with the production specifications, which is not conducive to production efficiency.

Description

Technical Field

[0001] This invention relates to the field of combined processing of pipe punching and pipe end flange bending, and in particular to a punching device for bending and pressing pipe edges. Background Technology

[0002] When using bent pipes as connectors, round pipes, which distribute stress more evenly, are generally preferred. Punching holes in the pipe head and wall can be used to assemble bolts. Extruding the round 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] Currently, mainstream edge-pressing and punching equipment requires a support mold inserted into the pipe head for support and shaping, and an external pressure device to complete edge pressing and punching. Since the mold size is uniform, one mold size can only correspond to the production of one product specification. Therefore, when the product specification is changed in the factory, the corresponding mold also needs to be changed. Mold replacement requires debugging, positioning, and trial molding. This entire replacement process has a significant impact on the factory's production efficiency. Therefore, in order to solve the problem mentioned above where a single mold size cannot be compatible with processing multiple product specifications, resulting in the need to change the mold along with the production specifications, which is detrimental to production efficiency, a punching device for bending pipe edge pressing is proposed. Summary of the Invention

[0004] In view of the problem in the above or existing technology that a single mold size cannot be compatible with the processing of multiple specifications of products, resulting in the need to change the mold along with the production specifications, which is detrimental to production efficiency, the present invention is proposed.

[0005] Therefore, the object of the present invention is to provide a punching device for bending and pressing edges of pipes.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a punching device for pressing the edge of a pipe, comprising a punching machine, and further comprising: a Z-axis punch and a Y-axis punch disposed on the punching machine; a crossbeam disposed along the X-axis direction, and a tooling mechanism that moves linearly along the crossbeam, comprising a tooling plate and a die core inserted side by side along the Y-axis on the plate; the crossbeam is provided with a bracket, and an expansion sleeve is hung on the bracket; the Y-axis punch pushes the die core to insert the expansion sleeve, causing it to expand inside the end of the pipe, thereby pre-forming the contour of the end of the pipe; a pressure plate for pressing the edge is disposed parallel to the outer wall of the expansion sleeve; the expansion sleeve is made of a rigid metal material with elasticity, and the side walls of the expansion sleeve are all hollowed out with wave-shaped spring sheets; the die core is provided with a die hole in the axial direction of the Z-axis punch in conjunction with the expansion sleeve;

[0007] A guide rail is fixed on the crossbeam along the X-axis. The blade plate is slidably connected to the guide rail. Blade holders are fixed side by side on the blade plate. The blade holders are used for storing and positioning the mold cores. The blade holders are made of thin-walled metal square tubes. All four side walls are stamped inward to obtain elastic pressure plates. The pressure plates support the mold cores from different directions and position mold cores of different sizes in the middle of the blade holders. The end of the mold core away from the expansion sleeve has an insertion hole along its axis. The bottom surface of the mold core has a slot connected to the insertion hole. A locking block is rotatably connected in the slot. The end diameter of the Y-axis punch is larger than the diameter of the rod at its connecting end. The locking block is fastened to the step between the end of the Y-axis punch and its rod. The end of the Y-axis punch is inserted and matched with the insertion hole.

[0008] In a preferred embodiment of the punching device for bending and pressing the edge of the pipe of the present invention, the bottom surface of the blade holder is punched upward to form a paddle, and the paddle is slidably connected to the slot. The die core abuts against the paddle to position the depth of the die core inserted into the blade holder. The top of the paddle abuts against the push block to deflect it, controlling the engagement and disengagement of the block and the Y-axis punch. A spring abuts between the block and the bottom of the slot, and the spring provides a pre-tightening force for the engagement of the block and the Y-axis punch.

[0009] As a preferred embodiment of the punching device for bending and pressing the edge of the present invention, when the mold core abuts against the pawl, the deflection axis of the block is located between the pawl and the insertion hole opening, and at this time, the height of the end of the block bottom surface that abuts against the pawl is higher than the end located at the insertion hole opening.

[0010] As a preferred embodiment of the punching device for bending and pressing the edge of the present invention, the four edges of the expansion sleeve extend into four "L"-shaped side strips in the direction of the bracket. The two side strips located on the same side of the expansion sleeve have their short sides of the "L" shape facing each other. The bracket is fitted into both sides of the expansion sleeve in a "U" shape, and the short sides of the "L" shape of the side strips are hooked to the bracket along the Y-axis direction.

[0011] In a preferred embodiment of the punching device for bending and pressing the edge of the pipe of the present invention, the bracket extends into the gap between the short sides of the "L" shape on both sides of the expansion sleeve with a partition. The short sides of the "L" shape of the edge strip are elastically fitted with a short post one, and the short post one is perpendicularly abutting against the partition. The top surface of the expansion sleeve is provided with an adjusting screw one along the axis of the short post, which is used to compress the elastic element so that the expansion sleeve is adjusted relative to the bracket in the Z-axis direction. The edge strip and the vertical surface of the bracket are also provided with a short post two, which is perpendicular and elastically abutting against the vertical surface of the bracket. The outer walls on both sides of the bracket are provided with adjusting screw two along the axis of the short post two, which is used to compress the elastic element so that the expansion sleeve is adjusted relative to the bracket in the X-axis direction.

[0012] As a preferred embodiment of the punching device for bending and pressing the edge of the pipe of the present invention, the pressure plate corresponding to the Z-axis punch is fixedly connected to the Z-axis punch vertically, and the pressure plate is fixed with a punch corresponding to the die hole. All pressure plates other than the Z-axis punch are connected to cylinders, and the cylinder housing is fixedly connected to the crossbeam.

[0013] As a preferred embodiment of the punching device for bending and pressing the edge of the present invention, wherein: a timing belt is fixedly pressed on one side of the blade plate, the timing belt is parallel to the guide rail and is used to control the position coordinate of the blade plate on the X-axis, and the punching machine is also equipped with a flexible welding platform for placing and positioning the bent pipe.

[0014] The beneficial effects of the punching device for bending and pressing the edge of the present invention are as follows:

[0015] The punching device for bending and pressing of the pipe of the present invention achieves a working efficiency far exceeding that of manual mold replacement and debugging by pre-installing mold cores of different sizes and quickly switching their positions. It can solve the problem that the mold needs to be replaced along with the production specifications because a single mold size cannot be compatible with the processing of multiple specifications of products, which is detrimental to production efficiency.

[0016] The punching device for bending and pressing of the pipe of the present invention, through the elastic structure on the four walls of the expansion sleeve, allows the expansion sleeve to be flexibly adjusted in terms of the side length of the square pipe opening being processed. By inserting mold cores of different sizes into the expansion sleeve, it can quickly meet the requirements of different processing specifications, satisfy the need for fixing the bent pipe workpiece, and prevent friction and scratches on the inner wall of the bent pipe workpiece. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the equipment structure for a punching device used for bending and pressing edges of pipes.

[0019] Figure 2 for Figure 1 Enlarged view of the structure at point A in the middle.

[0020] Figure 3 for Figure 2 The diagram shows the structure from another perspective.

[0021] Figure 4 This is a schematic diagram of the knife-distributing mechanism.

[0022] Figure 5 This is a sectional view of the assembly structure between the cutter bar, the cutter holder, and the mold core.

[0023] Figure 6 This is a sectional view of the assembly structure between the tool holder and the mold core (the mold core and tool holder are assembled in place).

[0024] Figure 7 for Figure 6 Enlarged view of the structure at point B.

[0025] Figure 8 This is a sectional view of the assembly structure between the tool holder and the die core (the die core will be pushed away from the tool holder by the Y-axis punch).

[0026] Figure 9 for Figure 8 Enlarged view of the structure at point C.

[0027] Figure 10 This is a schematic diagram of the assembly structure of the bracket and the expansion sleeve.

[0028] Figure 11 for Figure 10 A schematic diagram of the structure after partial cross-section at screw one and screw two.

[0029] Figure 12 This is an exploded view of the structure between the expansion sleeve, the mold core, the Y-axis punch, and the pre-formed end of the bent tube.

[0030] In the diagram: 100, stamping machine; 101, Z-axis punch; 102, Y-axis punch; 103, crossbeam; 104, guide rail; 105, bracket; 1051, partition; 1052, short column two; 1053, screw two; 106, synchronous belt; 107, flexible welding platform; 200, knife block mechanism; 201, knife block plate; 202, knife block holder; 2021, pressure plate; 2022, pry bar; 203, mold core; 2031, mold hole; 2032, insertion hole; 2033, slot; 204, locking block; 205, spring; 300, expansion sleeve; 3001, spring sheet; 3002, edge strip; 3003, short column one; 3004, screw one; 400, pressure plate; 4001, punch; 401, cylinder. Detailed Implementation

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] Example, refer to Figures 1-12 This embodiment provides a punching device for bending and pressing pipes, which can quickly switch to molds of different sizes, saving the time of manual mold replacement, disassembly and debugging.

[0033] like 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. All pressure plates 400 other than the Z-axis punch 101 are connected to cylinders 401, and the housing of the cylinders 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 This allows for the pre-forming of a round tube head into a square shape with a high degree of completion. Subsequently, pressure is applied to the four outer walls of the round tube once to complete the forming process, and punching is completed using the pre-reserved die holes 2031 in the die core 203.

[0037] During the above process, the bent pipe workpiece does not require any other fastening measures because the mold core 203 is not directly inserted into the pipe head. The mold core 203 only rubs against the expansion sleeve 300, and the position of the expansion sleeve 300 relative to the bent pipe workpiece remains unchanged. Moreover, after expansion, the expansion sleeve 300 tightens the pipe head, which also plays a role in firmly positioning and fixing the pipe.

[0038] Therefore, the punching device for bending and pressing of the pipe of the present invention, through the elastic structure on the four walls of the expansion sleeve 300, allows the expansion sleeve 300 to be flexibly adjusted in terms of the side length of the square pipe opening. By inserting mold cores 203 of different sizes into the expansion sleeve 300, different processing specifications can be quickly formed. At the same time, it meets the fixing requirements of the bent pipe workpiece, and does not rub or scratch the inner wall of the bent pipe workpiece. The present invention also has the ability to achieve a working efficiency far exceeding that of manual mold changing and debugging equipment by pre-installing mold cores 203 of different sizes and quickly switching their positions. It can solve the problem that the mold needs to be changed along with the production specifications because a single mold size cannot be compatible with the processing of multiple specifications of products, which is detrimental to production efficiency.

[0039] This invention also relates to the following technical details:

[0040] Firstly, the movement of the knife-distributing mechanism 200;

[0041] refer to Figure 4 The main assembly structure of the knife-distribution mechanism 200 can be seen. A guide rail 104 is fixed on the crossbeam 103 along the X-axis. The knife-distribution plate 201 is slidably connected to the guide rail 104. A synchronous belt 106 is fixedly pressed on one side of the knife-distribution plate 201. The synchronous belt 106 is parallel to the guide rail 104 and is used to control the position coordinates of the knife-distribution plate 201 on the X-axis. A knife-distribution holder 202 is fixed in parallel on the knife-distribution plate 201. The knife-distribution holder 202 is used for storing and positioning the mold core 203. The synchronous belt 106 can be wound around a synchronous pulley and then driven by a servo motor to achieve precise positioning of the knife-distribution plate 201 and the mold core 203.

[0042] refer to Figure 5 The tool holder 202 is made of thin-walled metal square tube, and its four side walls are all punched inward to form 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 tool holder 202. Thus, the present invention can not only pre-load multiple mold cores 203, but also, when loading the mold cores 203, simply insert the tail end of the mold core 203 into the tool holder 202. The multiple pressure plates 2021 on the inner wall of the tool holder 202 position the mold cores 203 in the middle of the tool holder 202 by symmetrically pressing the outer walls of the mold cores 203, thus eliminating the trouble of adjustment.

[0043] Furthermore, refer to Figure 9When the mold core 203 abuts against the lever 2022, the deflection axis of the locking block 204 is located between the lever 2022 and the opening of the insertion hole 2032. At this time, the height of the end of the bottom surface of the locking block 204 that abuts against the lever 2022 is higher than the end located at the opening of the insertion hole 2032. It can be seen that the bottom surface of the locking block 204 is like a seesaw. When the mold core 203 is inserted into place, the lever 2022 on the bottom surface of the cutter holder 202 slides from one end of the bottom surface of the locking block 204 to the other end through elastic deformation. Then the lever 2022 recovers its elastic deformation inside the groove 2033 of the mold core 203, lifting one end of the locking block 204. Since the lever 2022 needs to be bent when it slides past the axis of the locking block 204, a pre-tightening force can be given to the mold core 203 to prevent it from falling off during equipment operation.

[0044] refer to Figures 5-9 It can be seen how the mold core 203 moves away from the tool holder 202 with the Y-axis punch 102, and how it moves back to the zero position of the tool holder 202 with the Y-axis punch 102. An insertion hole 2032 is opened at the end of the mold core 203 away from the expansion sleeve 300 along its axial direction, and a slot 2033 is opened on the bottom surface of the mold core 203 connecting to the insertion hole 2032. A locking block 204 is rotatably connected inside 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 head 102 end is inserted into the socket 2032. The bottom surface of the tool 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 tool 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 pre-tightening force for the engagement of the block 204 and the Y-axis punch 102.

[0045] The above is a step-by-step explanation. Step one, refer to... Figure 6 and Figure 7 Once the mold core 203 and the tool holder 202 are inserted into place (considered the zero position), the Y-axis punch 102 enters the insertion hole 2032, about to push the mold core 203. At this time, due to the upward push of the lever 2022 against one end of the locking block 204, the other end of the locking block 204 is retracted into the slot 2033. The locking block 204 is not engaged with the step at the end of the Y-axis. (See step two for reference.) Figure 8 and Figure 9The Y-axis punch 102 continues to move, pushing the mold core 203. The elastic deformation of the lever 2022 allows the mold core 203 and its internal locking block 204 to slide out. After the locking block 204 is released from the control of the lever 2022, it is pushed by the spring 205 and engages 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 moves forward and backward 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 already entered the expansion sleeve 300 before it is completely separated from the cutter holder 202. Therefore, no unexpected deflection will occur.

[0046] Secondly, regarding the assembly and adjustment of the expansion sleeve 300, and the fit between the expansion sleeve 300 and the mold core 203:

[0047] refer to Figure 10 and Figure 11 Four L-shaped side strips 3002 extend from the four edges of the expansion sleeve 300 towards the bracket 105. Two side strips 3002 located on the same side of the expansion sleeve 300 have their short sides of the L-shape facing each other. The bracket 105 is fitted into both sides of the expansion sleeve 300 in a U-shape, and the short sides of the L-shapes of the side strips 3002 are hooked to the bracket 105 along the Y-axis. A partition 1051 extends from the bracket 105 into the gap between the short sides of the L-shapes on both sides of the expansion sleeve 300. Each short side of the L-shape of the side strips 3002 is elastically fitted with a short... Column 1 3003, and short column 1 3003 perpendicularly abuts against partition 1051. The top surface of expansion sleeve 300 is provided with adjusting screw 1 3004 along the axis of short column, which is used to compress the elastic element so that expansion sleeve 300 is adjusted relative to bracket 105 in the Z-axis direction. Short column 2 1052 is also provided perpendicularly and elastically abutting between side strip 3002 and the vertical surface of bracket 105. Adjusting screw 2 1053 is provided on both sides of the outer wall of bracket 105 along the axis of short column 2 1052, which is used to compress the elastic element so that expansion sleeve 300 is adjusted relative to bracket 105 in the X-axis direction.

[0048] In the above structure, when the mold core 203 is inserted into the expansion sleeve 300, it is connected to the robust bracket 105 through the short side of the "L" shape, preventing the expansion sleeve 300 from moving forward with the mold core 203. The up-down and left-right positions of the expansion sleeve 300 are adjustable between the bracket 105 and the expansion sleeve 300 by the elastic support of the short column 1 3003 and the short column 2 1052. If the screw 1 3004 is turned downward, the pushing force of the short column above the partition 1051 on the partition 1051 is increased, and the expansion sleeve 300 is slightly adjusted upward. Conversely, the expansion sleeve 300 is slightly adjusted downward. Similarly, if the screw 2 1053 on one side of the bracket 105 is screwed into the bracket 105 and the screw 2 1053 on the other side of the bracket 105 is loosened, the expansion sleeve 300 is slightly adjusted to the side where the screw is screwed into the bracket 105.

[0049] As can be seen from the above adjustment method, the expansion sleeve 300 is not directly and rigidly fastened to the bracket 105, but is a soft connection with a floating effect in the up and down and left and right. Thanks to the working method of the mold core 203 and the expansion sleeve 300, this will not interfere with the operation of the expansion sleeve 300. On the contrary, it provides a certain tolerance range for the alignment of the mold core 203 before it is inserted into the expansion sleeve 300, so that the device can operate easily and smoothly.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

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 sheets (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). A guide rail (104) is fixed on the crossbeam (103) along the X-axis. 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). 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 core (203) from different directions and position the mold cores (203) of different sizes on the blade holder (202). In the middle of the mold core (203), an insertion hole (2032) is opened at one end away from the expansion sleeve (300) along its axial direction, and a slot (2033) is opened on the bottom surface of the mold core (203) in connection with the insertion hole (2032), and 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, and the end of the Y-axis punch (102) is inserted and matched with the insertion hole (2032).

2. The punching device for bending and pressing pipes as described in claim 1, 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 a preload force for the engagement of the block (204) and the Y-axis punch (102).

3. The punching device for bending and pressing pipes as described in claim 2, 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).

4. 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.

5. The punching device for bending and pressing pipes as described in claim 4, characterized in that: The bracket (105) extends into the gap between the short sides of the "L" shape on both sides of the expansion sleeve (300) with a partition (1051). The short sides of the "L" shape of the side strip (3002) are elastically fitted with short posts one (3003), and the short posts one (3003) perpendicularly abut against the partition (1051). The top surface of the expansion sleeve (300) is provided with an adjusting screw one (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 two (1052) perpendicularly and elastically abutting against each other. The outer walls on both sides of the bracket (105) are provided with adjusting screw two (1053) along the axis of the short post two (1052), which is used to squeeze the elastic element so that the expansion sleeve (300) is adjusted relative to the bracket (105) in the X-axis direction.

6. 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).

7. 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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