Numerical control machine tool for directional stamping finishing machining of stainless steel pipes

Abstract

The invention relates to the technical field of pipe stamping finishing, in particular to a numerical control machine tool for directional stamping finishing machining of stainless steel pipes. Comprising a machine body, a portal frame is arranged on the machine body, a stamping device is installed on the portal frame, and a stamping head is detachably installed on the stamping device; a cam is driven to rotate through a second motor, burrs generated by punching and leftover materials of a broken part adhere to the inner wall of the stainless steel pipe and are brought into a receding groove, a threaded rod is driven to rotate through a third motor, and a sliding block drives a trimming blade to be attached to the upper surface of an arc-shaped block to move; burrs and leftover materials adhered to the inner walls of the stainless steel pipes are removed and fall into the receding grooves, so that finishing operation on the inner walls of the stainless steel pipes is achieved, and the stainless steel pipes of different sizes and specifications can be limited and fixed through the multiple sets of arc-shaped blocks when the cams rotate to different angle values; therefore, burrs on the inner walls of pipes with different inner diameters can be trimmed, and the universality of the machine tool is effectively improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of pipe stamping finishing, and particularly relates to a numerical control machine tool for directional stamping finishing of stainless steel pipes. BACKGROUND

[0002] In the process of processing stainless steel pipes, stamping and opening are common process requirements, especially in the fields of automobile exhaust pipes, building structural parts and industrial fluid pipelines. Traditional punching equipment usually adopts a fixed clamping mechanism, fixes the pipe through an external clamp or die, and then performs one-way stamping.

[0003] However, such technology has the following main problems: 1. High risk of pipe deformation: lack of inner wall support during stamping, resulting in concave hole edges or pipe body distortion, affecting size accuracy (especially for thin-walled pipes); 2. Poor multi-specification adaptability: different pipe diameters require replacement of special clamps, which is time-consuming and costly to adjust; 3. Inefficient scrap handling: metal scraps generated during stamping are easily left inside the pipe or scattered, requiring additional cleaning processes, which pollutes the environment and increases safety hazards; 4. Secondary processing requirements: the inner wall burrs after punching need to be manually polished or another finishing station needs to be set up, prolonging the production cycle. Therefore, there is an urgent need for a directional stamping device with self-adaptive tensioning, punching-finishing collaborative operation and efficient chip removal function to improve processing quality and efficiency. After searching, the authorized patent document with publication number CN222626874U and publication date 2025.03.18 discloses a stainless steel pipe stamping and finishing equipment. It mainly aims at the problem that the existing stamping and finishing equipment needs to polish the opening after punching to avoid the generation of protrusions, which affects the subsequent use of the stainless steel pipe. Since the size of the processed pipe is different, if different sizes of pipes need to be corrected, the finishing structure needs to be replaced, which is more troublesome. The technical scheme is as follows: a base is provided, an auxiliary support frame is installed on the top wall of the base to support the stainless steel pipe, and reinforcing ribs are symmetrically welded on the both side walls of the auxiliary support frame to reinforce the position of the auxiliary support frame. This application can replace the appropriate size of the finishing cylinder without disassembly, which provides convenience for polishing the stainless steel pipe after punching, avoids the protrusions and barbs at the punching opening, and affects the use of the stainless steel pipe.

[0004] However, the device still has the following defects: the finishing cylinder has only a few fixed sizes, although it can meet the finishing of pipes with different wall thicknesses, but it cannot adaptively adapt and finish pipes with different inner diameters, thus the device has great limitations, and lacks inner wall support during stamping, resulting in concave hole edges or pipe body distortion. SUMMARY

[0005] In view of the above problems, the present application provides a numerical control machine tool for directional stamping and finishing of stainless steel pipes, comprising a bed body, a gantry arranged on the bed body, a stamping device mounted on the gantry, and a stamping head detachably mounted on the stamping device; A fixing frame is arranged on the bed body, and a stamping auxiliary assembly is mounted on the fixing frame; The stamping auxiliary assembly comprises a steering mechanism, a cylindrical transmission box and a limiting mechanism; The limiting mechanism comprises an adjusting cylinder, a receiving cylinder and a conical guide cylinder, a tensioning mechanism is slidably connected in the adjusting cylinder, and the tensioning mechanism comprises a positioning cylinder, a chip guiding part and a plurality of groups of abutting parts for tensioning and supporting the inner wall of the pipe; A cam is rotatably connected between the two groups of inner walls of the positioning cylinder, a plurality of groups of protrusions are arranged on the cam, the plurality of groups of protrusions are one-to-one corresponding to the plurality of groups of abutting parts, and a recess is arranged between each adjacent two groups of protrusions; The abutting part comprises an arc-shaped block, the top end of the arc-shaped block abuts against the inner wall of the stainless steel pipe, a recess slot for accommodating the stamping head is formed at the center of the top end of the arc-shaped block, and a finishing part for cutting burrs and corner scraps generated by stamping is arranged on the arc-shaped block.

[0006] Further, the steering mechanism comprises two groups of fixing plates, the two groups of fixing plates are mounted on the fixing frame, a worm is rotatably connected between the two groups of fixing plates, a first motor is mounted on one group of the fixing plates, the output end of the first motor is in transmission connection with one end of the worm, an annular worm gear sleeve is meshingly connected on the worm, and the annular worm gear sleeve is sleeved on the cylindrical transmission box.

[0007] Further, one end of the cylindrical transmission box is rotatably connected with the fixing frame, the other end of the cylindrical transmission box is fixedly connected with the limiting mechanism, and an electric cylinder is mounted in the cylindrical transmission box.

[0008] Further, one end of the receiving cylinder is fixedly connected with the cylindrical transmission box, the other end of the receiving cylinder is fixedly connected with the conical guide cylinder, the other end of the conical guide cylinder is fixedly connected with the adjusting cylinder, a plurality of first guide grooves are formed in the conical guide cylinder, a plurality of second guide grooves are formed in the adjusting cylinder, and the plurality of second guide grooves are one-to-one corresponding to and in communication with the plurality of first guide grooves.

[0009] Further, a second motor is mounted at the center of the outer wall of the other side of the positioning cylinder, a limiting groove is formed in the cam, and the output end of the second motor is in transmission connection with the center of the cam.

[0010] Further, the chip guide part comprises a ring-shaped chip guide cylinder fixedly connected with one end of the positioning cylinder, a telescopic chip guide hose communicated with the ring-shaped chip guide cylinder, one end of the telescopic chip guide hose extending into the chip collecting box, and a plurality of chip suction pipes communicated with the side wall of the ring-shaped chip guide cylinder.

[0011] Further, the bottom end of the arc-shaped block is fixedly connected with a sliding shaft, a plurality of slide grooves are arranged in the side wall of the positioning cylinder, and the plurality of slide grooves are movably combined with the plurality of sliding shafts, respectively.

[0012] Further, the trimming part comprises a trimming blade movably combined with the upper surface of the arc-shaped block, two groups of telescopic rods fixedly connected with the bottom end of the trimming blade, and sliding blocks fixedly connected with the bottom end of the two groups of telescopic rods.

[0013] Further, the bed body is provided with a lifting platform, the top end of the lifting platform is provided with an arc-shaped supporting plate, the arc-shaped supporting plate is movably combined with the stainless steel pipe, and the arc-shaped supporting plate is arranged on one side of the stamping device.

[0014] Further, the bed body is further provided with a chip collecting box, the chip collecting box is provided with a vacuum pump, the air inlet end of the vacuum pump extends into the interior of the chip collecting box, and the air inlet end of the vacuum pump is provided with a dustproof net.

[0015] The beneficial effects of the present application are as follows: 1. The second motor drives the cam to rotate, causing several sets of rollers to move within the limiting groove. This, in turn, drives several sets of sliding shafts to move synchronously away from the center of the positioning cylinder. Consequently, several sets of arc-shaped blocks synchronously contact and tension the inner wall of the stainless steel pipe. After the punching operation is completed, the burrs and scraps from the punching process adhere to the inner wall of the stainless steel pipe and are carried into the relief groove. The third motor drives the threaded rod to rotate, causing the slider to move the trimming blade against the upper surface of the arc-shaped block. This removes the burrs and scraps adhering to the inner wall of the stainless steel pipe and drops them into the relief groove, thus achieving the trimming operation of the inner wall of the stainless steel pipe. By rotating the cam to different angle values, the several sets of arc-shaped blocks can limit and fix stainless steel pipes of different sizes and specifications, thereby achieving the trimming of the inner wall burrs of pipes with different inner diameters and effectively improving the versatility of the machine tool.

[0016] 2. The pressure value between the arc-shaped block and the inner wall of the stainless steel pipe is monitored by a pressure sensor. The pressure value is adjusted in conjunction with the rotation of the cam to keep the pressure value within a preset range. This ensures that the tension of the arc-shaped block on the stainless steel pipe meets the requirements for limiting and fixing the stainless steel pipe while avoiding excessive pressure that could cause pipe wall deformation. The clearance groove is precisely aligned with the punching head, providing reverse support force during punching, reducing pipe wall thickness deformation, and improving the roundness of the hole edge. This machine tool can perform punching operations on stainless steel pipes of different diameters and effectively avoid pipe deformation.

[0017] 3. When punching stainless steel pipes with a punching head, the punching head moves into the relief groove after penetrating the inner wall of the stainless steel pipe, allowing the chips generated by punching to enter the relief groove. A vacuum pump creates a negative pressure inside the chip collection box, which in turn creates a negative pressure inside the connected annular chip guide cylinder. The chips are then drawn into the annular chip guide cylinder through the chip discharge pipe and suction pipe, so that the chips generated by punching can be sucked into the chip collection box for centralized processing.

[0018] 4. Select a suitable punching head according to the requirements. The first motor drives the worm gear to rotate, which in turn drives the cylindrical transmission box to rotate. This causes the storage cylinder to drive the tensioning mechanism to rotate synchronously, moving a set of contact parts that match the specifications and dimensions of the punching head to the top. This allows the machine tool to adapt to the punching needs of various sizes and specifications, further improving its practicality. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 Fig. 1 shows a schematic diagram of a main body structure according to an embodiment of the present application; Figure 2 Fig. 2 shows a schematic diagram of a stamping auxiliary assembly structure according to an embodiment of the present application; Figure 3 Fig. 3 shows a partial structure sectional view of a stamping auxiliary assembly according to an embodiment of the present application; Figure 4 Fig. 4 shows a schematic diagram of a tensioning mechanism structure according to an embodiment of the present application; Figure 5 Fig. 5 shows another angle schematic diagram of a tensioning mechanism structure according to an embodiment of the present application; Figure 6 Fig. 6 shows a partial structure sectional view of a positioning cylinder internal structure according to an embodiment of the present application; Figure 7 Fig. 7 shows a schematic diagram of an arc-shaped block structure according to an embodiment of the present application; Figure 8 Fig. 8 shows a partial structure sectional view of an arc-shaped block internal structure according to an embodiment of the present application.

[0021] Fig. 1 shows a schematic diagram of a main body structure according to an embodiment of the present application; Fig. 2 shows a schematic diagram of a stamping auxiliary assembly structure according to an embodiment of the present application; Fig. 3 shows a partial structure sectional view of a stamping auxiliary assembly according to an embodiment of the present application; Fig. 4 shows a schematic diagram of a tensioning mechanism structure according to an embodiment of the present application; Fig. 5 shows another angle schematic diagram of a tensioning mechanism structure according to an embodiment of the present application; Fig. 6 shows a partial structure sectional view of a positioning cylinder internal structure according to an embodiment of the present application; Fig. 7 shows a schematic diagram of an arc-shaped block structure according to an embodiment of the present application; Fig. 8 shows a partial structure sectional view of an arc-shaped block internal structure according to an embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0023] The embodiment of the present application provides a numerical control machine tool for directional stamping and trimming of stainless steel pipes, which comprises a bed body 100. Figure 1 As shown in the figure.

[0024] The bed body 100 is provided with a portal frame 200, the portal frame 200 is installed with a stamping device 300, the stamping device 300 is detachably installed with a stamping head 310, the bed body 100 is provided with a lifting platform 400, the top end of the lifting platform 400 is provided with an arc-shaped supporting plate 500, the arc-shaped supporting plate 500 is movably attached to the stainless steel pipe, the arc-shaped supporting plate 500 is arranged on one side of the stamping device 300, the bed body 100 is provided with a fixing frame 600, the fixing frame 600 is arranged on the other side of the stamping device 300, and the fixing frame 600 is installed with a stamping auxiliary assembly 700. Specifically, the arc-shaped supporting plate 500 supports the stainless steel pipe, which facilitates the operator to align one end of the stainless steel pipe with the stamping auxiliary assembly 700, the lifting platform 400 drives the arc-shaped supporting plate 500 to move up and down, which facilitates the adjustment of the height of the stainless steel pipe of different sizes, so that the central axis of the stainless steel pipe coincides with the central axis of the stamping auxiliary assembly 700, so that the stainless steel pipe can be sleeved on the stamping auxiliary assembly 700, the stamping head 310 on the stamping device 300 is used for punching operation on the stainless steel pipe, and different specifications of the stamping head 310 are replaced, so that the stainless steel pipe can meet the punching requirements of different specifications.

[0025] The bed body 100 is also provided with a chip collecting box 800, the chip collecting box 800 is installed with a vacuum pump 900, the air inlet end of the vacuum pump 900 extends to the inside of the chip collecting box 100, and the air inlet end of the vacuum pump 900 is provided with a dust screen. Specifically, the vacuum pump 900 forms negative pressure in the inside of the chip collecting box 800, so that the debris generated by the punching process can be sucked into the chip collecting box 800 for centralized treatment.

[0026] As shown in the figure. Figures 2-6 As shown in the figure.

[0027] The stamping auxiliary assembly 700 comprises a steering mechanism 710, a cylindrical transmission box 720 and a limiting mechanism 730, the steering mechanism 710 comprises two groups of fixed plates 711, both groups of the fixed plates 711 are installed on the fixed frame 600, a worm 712 is rotatably connected between the two groups of the fixed plates 711, a first motor 713 is installed on one group of the fixed plates 711, the output end of the first motor 713 is in transmission connection with one end of the worm 712, an annular worm gear sleeve 714 is in meshing connection with the worm 712, the annular worm gear sleeve 714 is sleeved on the cylindrical transmission box 720; One end of the cylindrical transmission box 720 is rotatably connected with the fixed frame 600, the other end of the cylindrical transmission box 720 is fixedly connected with the limiting mechanism 730, an electric cylinder 721 is installed in the cylindrical transmission box 720; The limiting mechanism 730 comprises a receiving cylinder 731, a conical guide cylinder 732 and an adjusting cylinder 733, one end of the receiving cylinder 731 is fixedly connected with the cylindrical transmission box 720, the other end of the receiving cylinder 731 is fixedly connected with the conical guide cylinder 732, the other end of the conical guide cylinder 732 is fixedly connected with the adjusting cylinder 733, a plurality of groups of first guide grooves 734 are formed in the conical guide cylinder 732, a plurality of groups of second guide grooves 735 are formed in the adjusting cylinder 733, the plurality of groups of the second guide grooves 735 correspond to and communicate with the plurality of groups of the first guide grooves 734, a tensioning mechanism 740 is slidably connected in the adjusting cylinder 733, the tensioning mechanism 740 is in transmission connection with the output end of the electric cylinder 721; The tensioning mechanism 740 comprises a chip guiding part 741, a positioning cylinder 742 and a plurality of groups of abutting parts 743, the chip guiding part 741 comprises an annular chip guiding cylinder 741-1, the annular chip guiding cylinder 741-1 is fixedly connected with one end of the positioning cylinder 742, the annular chip guiding cylinder 741-1 is in communication with a telescopic chip guiding hose 741-2, the other end of the telescopic chip guiding hose 741-2 extends into a chip collecting box 800, a plurality of groups of chip suction pipes 741-3 are in communication with the side wall of the annular chip guiding cylinder 741-1, the other end of each group of the chip suction pipes 741-3 is in communication with a corresponding group of the abutting parts 743; The center of the outer wall of one side of the positioning cylinder 742 is in transmission connection with the output end of the electric cylinder 721, a second motor 744 is installed at the center of the outer wall of the other side of the positioning cylinder 742, a cam 745 is rotatably connected between the two groups of inner walls of the positioning cylinder 742, a plurality of groups of protrusions are arranged on the cam 745, the plurality of groups of the protrusions correspond to the plurality of groups of the abutting parts 743 one by one, a recess is arranged between every adjacent two groups of the protrusions, a limiting groove 745-1 is formed in the cam 745, the output end of the second motor 744 is in transmission connection with the center of the cam 745; A plurality of said abutting parts 743 are arranged in a ring array centered on the central axis of the positioning cylinder 742, said abutting parts 743 include arc-shaped blocks 743-1, the top end of said arc-shaped blocks 743-1 abutting the inner wall of the stainless steel pipe, the bottom end of said arc-shaped blocks 743-1 is fixedly connected with a sliding shaft 743-2, the side wall of said positioning cylinder 742 is provided with a plurality of groups of sliding grooves 742-1, a plurality of groups of said sliding grooves 742-1 are respectively movably attached to a plurality of groups of sliding shafts 743-2, a spring 743-3 is arranged between said arc-shaped blocks 743-1 and the outer wall of the positioning cylinder 742, said spring 743-3 is sleeved on the sliding shaft 743-2, the bottom end of said sliding shaft 743-2 is provided with a roller 743-4, said roller 743-4 is movably attached to the inner wall of the limiting groove 745-1; Specifically, in the initial state, a plurality of rollers 743-4 are respectively attached to the limiting grooves 745-1 in the recesses of the cam 745, at this time the tensioning mechanism 740 is located in the storage cylinder 731, the first motor 713 drives the worm 712 to rotate, the annular worm gear sleeve 714 drives the cylindrical transmission box 720 to rotate, the storage cylinder 731 drives the tensioning mechanism 740 to rotate synchronously, a group of abutting parts 743 moves to directly above, the stainless steel pipe is sleeved on the adjusting cylinder 733, and the position to be processed is moved to directly below the punching head 310, the electric cylinder 721 drives the tensioning mechanism 740 to move to the position to be processed inside the stainless steel pipe, the second motor 744 drives the cam 745 to rotate, a plurality of rollers 743-4 are attached to the limiting grooves 745-1 to move, thereby driving a plurality of sliding shafts 743-2 to move synchronously away from the center of the positioning cylinder 742, thereby enabling a plurality of arc-shaped blocks 743-1 to contact and tension the inner wall of the stainless steel pipe synchronously, the cam 745 is rotated to different angle values, which enables a plurality of arc-shaped blocks 743-1 to limit and fix stainless steel pipes of different size specifications, avoiding deviation of the stainless steel pipe during punching operation; Further, the position of the arc-shaped block 743-1 directly above abutting the stainless steel pipe is the position to be punched, the arc-shaped block 743-1 supports the position to be punched, effectively preventing the pipe wall of the stainless steel pipe from being deformed during punching.

[0028] As shown in the examples of Figure 7 and Figure 8 .

[0029] The arc-shaped block 743-1 is provided with a let-position slot 743-5 at the center of the top end, the size of the let-position slot 743-5 is consistent with the stamping head 310, the sizes of the let-position slots 743-5 opened on the arc-shaped blocks 743-1 of the several groups are different, the sizes of the let-position slots 743-5 of the several groups are respectively consistent with the sizes of the stamping heads 310 of different groups, the sidewall of the arc-shaped block 743-1 is provided with a chip removal pipe 743-6, one end of the chip removal pipe 743-6 is connected with the inside of the let-position slot 743-5, the other end of the chip removal pipe 743-6 is connected with the chip suction pipe 741-3, and the upper surface of the arc-shaped block 743-1 is provided with a pressure sensor 743-7. Specifically, the pressure value between the arc-shaped block 743-1 and the inner wall of the stainless steel pipe is monitored through the pressure sensor 743-7, the pressure value is adjusted by cooperating with the rotation of the cam 745, the pressure value is kept in the preset range, so that the tension degree of the arc-shaped block 743-1 to the stainless steel pipe meets the limiting and fixing of the stainless steel pipe while avoiding the deformation of the pipe wall caused by excessive pressure. When the stamping head 310 punches the stainless steel pipe, the stamping head 310 penetrates the inner wall of the stainless steel pipe and moves into the let-position slot 743-5, so that the debris generated by stamping enters the let-position slot 743-5, the debris enters the chip suction pipe 741-3 through the chip removal pipe 743-6, and finally enters the chip collection box for centralized treatment.

[0030] The arc-shaped block 743-1 is provided with a trimming part 746, the trimming part 746 includes a trimming blade 746-1, the trimming blade 746-1 is movably attached to the upper surface of the arc-shaped block 743-1, the bottom end of the trimming blade 746-1 is fixedly connected with two groups of telescopic rods 746-2, the bottom end of each group of telescopic rods 746-2 is fixedly connected with a sliding block 746-3, two groups of installation grooves 743-8 are symmetrically opened on the arc-shaped block 743-1, the top end of each group of installation grooves 743-8 is provided with an arc-shaped guide rail 743-9, a through groove is opened on each group of arc-shaped guide rails 743-9, each group of telescopic rods 746-2 is movably attached to a corresponding group of through grooves, the inner wall of one group of installation grooves 743-8 is fixedly connected with a guide shaft, the guide shaft is movably attached to one group of sliding blocks 746-3, the inner wall of the other group of installation grooves 743-8 is rotatably connected with a threaded rod 746-4, the threaded rod 746-4 is threadedly connected with the other group of sliding blocks 746-3, and a third motor 746-5 is embeddedly installed in the arc-shaped block 743-1, and the output end of the third motor 746-5 is drivingly connected with one end of the threaded rod 746-4. Specifically, after the punching operation is completed, burrs and broken parts generated by the punching operation are adhered to the inner wall of the stainless steel pipe and are brought into the accommodation groove 743-5, the third motor 746-5 drives the threaded rod 746-4 to rotate, the sliding block 746-3 drives the trimming blade 746-1 to move and adhere to the upper surface of the arc block 743-1, the burrs and the broken parts adhered to the inner wall of the stainless steel pipe are removed and fall into the accommodation groove 743-5, and thus the trimming operation on the inner wall of the stainless steel pipe is realized.

[0031] The working principle of the numerical control machine tool for directional punching and trimming processing of stainless steel pipes provided by the application is as follows: The arc-shaped supporting plate 500 supports the stainless steel pipe, which facilitates the operator to align one end of the stainless steel pipe with the punching auxiliary assembly 700, the arc-shaped supporting plate 500 is driven by the lifting table 400 to move up and down, which facilitates the adjustment of the height of the stainless steel pipe of different sizes, so that the central axis of the stainless steel pipe coincides with the central axis of the punching auxiliary assembly 700, and the stainless steel pipe can be sleeved on the punching auxiliary assembly 700.

[0032] In the initial state, the plurality of groups of rollers 743-4 are respectively adhered to the limiting grooves 745-1 in the recesses of the cam 745, at this time, the tensioning mechanism 740 is located in the accommodation cylinder 731, the stainless steel pipe is sleeved on the adjusting cylinder 733, and the position to be processed is moved to the position directly below the punching head 310, the punching head 310 of the appropriate size is selected according to the requirement, the worm 712 is driven by the first motor 713 to rotate, the annular worm gear sleeve 714 drives the cylindrical transmission box 720 to rotate, the accommodation cylinder 731 drives the tensioning mechanism 740 to rotate synchronously, and one group of abutting parts 743 corresponding to the size of the punching head 310 is moved to the position directly above.

[0033] The tensioning mechanism 740 is driven by the electric cylinder 721 to move to the position to be processed inside the stainless steel pipe, the cam 745 is driven by the second motor 744 to rotate, the plurality of groups of rollers 743-4 are adhered to the limiting grooves 745-1 to move, thereby driving the plurality of groups of sliding shafts 743-2 to move synchronously away from the center of the positioning cylinder 742, thereby enabling the plurality of groups of arc-shaped blocks 743-1 to contact and tension the inner wall of the stainless steel pipe synchronously, and the cam 745 is rotated to different angle values, so that the plurality of groups of arc-shaped blocks 743-1 can limit and fix the stainless steel pipe of different sizes, avoiding the deviation of the stainless steel pipe during the punching operation, the pressure sensor 743-7 monitors the pressure value between the arc-shaped block 743-1 and the inner wall of the stainless steel pipe, and the pressure value is adjusted in cooperation with the rotation of the cam 745, so that the pressure value is kept within the preset range, so that the tensioning force of the arc-shaped block 743-1 on the stainless steel pipe meets the requirement of limiting and fixing the stainless steel pipe while avoiding the deformation of the pipe wall caused by excessive pressure.

[0034] The arc-shaped blocks 743-1 located directly above resist the position of the stainless steel pipe to be punched by the punch head 310 on the punching device 300, and the position to be punched is supported by the arc-shaped blocks 743-1, effectively avoiding the pipe wall of the stainless steel pipe from being deformed by concave during punching.

[0035] When the punch head 310 punches the stainless steel pipe, the punch head 310 moves to the accommodation groove 743-5 after penetrating the inner wall of the stainless steel pipe, so that the debris generated by punching enters the accommodation groove 743-5. The vacuum pump 900 forms a negative pressure in the inside of the debris collecting box 800, so that a negative pressure is formed in the annular debris guide cylinder 741-1 connected thereto. The debris enters the annular debris guide cylinder 741-1 through the debris discharge pipe 743-6 and the debris suction pipe 741-3, so that the debris generated by punching can be finally sucked into the debris collecting box 800 for centralized treatment.

[0036] After the punching operation is completed, the burrs and broken parts generated by punching are adhered to the inner wall of the stainless steel pipe and brought into the accommodation groove 743-5. The third motor 746-5 drives the threaded rod 746-4 to rotate, so that the sliding block 746-3 drives the trimming blade 746-1 to move and adhere to the upper surface of the arc-shaped block 743-1. The burrs and broken parts adhered to the inner wall of the stainless steel pipe are removed and fall into the accommodation groove 743-5, so as to realize the trimming operation of the inner wall of the stainless steel pipe.

[0037] Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalent ones. The modifications or replacements do not change the essence of the corresponding technical solutions, and do not deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A CNC machine tool for directional stamping and finishing of stainless steel pipes, comprising a bed, characterized in that: The bed is equipped with a gantry frame, and a stamping device is installed on the gantry frame. A stamping head is detachably installed on the stamping device. The bed is provided with a fixing frame, which is arranged opposite to the gantry frame, and the fixing frame is equipped with a stamping auxiliary component; The stamping auxiliary assembly includes a steering mechanism, a cylindrical transmission box, and a limiting mechanism; The limiting mechanism includes an adjusting cylinder, a receiving cylinder, and a conical guide cylinder. A tensioning mechanism is slidably connected inside the adjusting cylinder. The tensioning mechanism includes a positioning cylinder, a chip guide part, and several sets of contact parts for tensioning and supporting the inner wall of the pipe. A cam is rotatably connected between the two sets of inner walls of the positioning cylinder. The cam is provided with several sets of protrusions, and each set of protrusions corresponds to a set of abutting parts. A recess is provided between each pair of adjacent sets of protrusions. The contact part includes an arc-shaped block, and a relief groove for accommodating the stamping head is provided at the center of the top of the arc-shaped block. The arc-shaped block is provided with a trimming part for cutting burrs and scraps generated by stamping.

2. The CNC machine tool for directional stamping and finishing of stainless steel pipes according to claim 1, characterized in that: The steering mechanism includes two sets of fixed plates, both of which are mounted on a fixed frame. A worm gear is rotatably connected between the two sets of fixed plates. A first motor is mounted on one set of fixed plates. The output end of the first motor is connected to one end of the worm gear. An annular worm gear sleeve is meshed on the worm gear and is fitted onto a cylindrical transmission box.

3. The CNC machine tool for directional stamping and finishing of stainless steel pipes according to claim 2, characterized in that... One end of the cylindrical transmission box is rotatably connected to the fixed frame, and the other end of the cylindrical transmission box is fixedly connected to the limiting mechanism. An electric cylinder is installed inside the cylindrical transmission box.

4. The CNC machine tool for directional stamping and finishing of stainless steel pipes according to claim 1, characterized in that: One end of the storage tube is fixedly connected to the cylindrical transmission box, and the other end of the storage tube is fixedly connected to the conical guide tube. The other end of the conical guide tube is fixedly connected to the adjusting tube. The conical guide tube has several sets of first guide grooves, and the adjusting tube has several sets of second guide grooves. The several sets of second guide grooves correspond one-to-one with the several sets of first guide grooves and are interconnected.

5. The CNC machine tool for directional stamping and finishing of stainless steel pipes according to claim 1, characterized in that: A second motor is installed at the center of the outer wall on the other side of the positioning cylinder. A limit groove is opened on the cam, and the output end of the second motor is connected to the center of the cam for transmission.

6. The CNC machine tool for directional stamping and finishing of stainless steel pipes according to claim 1, characterized in that: The chip guiding section includes an annular chip guiding cylinder, one end of which is fixedly connected to the positioning cylinder. A telescopic chip guiding hose is connected to the annular chip guiding cylinder, and the other end of the telescopic chip guiding hose extends into the chip collection box. Several sets of chip suction pipes are connected to the side wall of the annular chip guiding cylinder. A chip discharge pipe is provided on the side wall of the arc-shaped block. One end of the chip discharge pipe is connected to the interior of the relief groove, and the other end of the chip discharge pipe is connected to the chip suction pipe. A pressure sensor is provided on the upper surface of the arc-shaped block.

7. The CNC machine tool for directional stamping and finishing of stainless steel pipes according to claim 6, characterized in that: The bottom end of the arc-shaped block is fixedly connected to a sliding shaft. The side wall of the positioning cylinder is provided with several sets of sliding grooves, which are movably fitted with several sets of sliding shafts respectively. A spring is provided between the arc-shaped block and the outer wall of the positioning cylinder. The spring is sleeved on the sliding shaft. A roller is installed at the bottom end of the sliding shaft.

8. The CNC machine tool for directional stamping and finishing of stainless steel pipes according to claim 1, characterized in that: The trimming part includes a trimming blade, which is movably fitted to the upper surface of the arc-shaped block. Two sets of telescopic rods are fixedly connected to the bottom end of the trimming blade, and sliders are fixedly connected to the bottom ends of the two sets of telescopic rods. Two sets of mounting slots are symmetrically opened on the arc-shaped block, and arc-shaped guide rails are provided at the top of the two sets of mounting slots. Through slots are opened on the two sets of arc-shaped guide rails. The two sets of telescopic rods are movably fitted to the corresponding set of through slots. A guide shaft is fixedly connected to the inner wall of one set of mounting slots, and the guide shaft is movably fitted to a set of sliders. A threaded rod is rotatably connected to the inner wall of the other set of mounting slots, and the threaded rod is threadedly connected to another set of sliders. A third motor is embedded inside the arc-shaped block, and the output end of the third motor is drivenly connected to one end of the threaded rod.

9. The CNC machine tool for directional stamping and finishing of stainless steel pipes according to claim 1, characterized in that: The bed is equipped with a lifting platform, and the top of the lifting platform is equipped with an arc-shaped support plate. The arc-shaped support plate is movably fitted with the stainless steel pipe and is located on one side of the stamping device.

10. The CNC machine tool for directional stamping and finishing of stainless steel pipes according to claim 1, characterized in that: The machine bed is also equipped with a chip collection box, on which a vacuum pump is installed. The air inlet of the vacuum pump extends into the interior of the chip collection box, and a dustproof screen is provided at the air inlet of the vacuum pump.

Images