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

Abstract

The present application relates 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. The numerical control machine tool comprises a bed body, a portal frame arranged on the bed body, a stamping device installed on the portal frame, and a stamping head detachably installed on the stamping device. The burrs and broken edge scraps generated by punching are adhered to the inner wall of the stainless steel pipe and brought into the accommodation groove through the rotation of the cam driven by the second motor. The rotation of the threaded rod driven by the third motor enables the sliding block to drive the finishing blade to move on the upper surface of the arc-shaped block, so that the burrs and edge scraps adhered to the inner wall of the stainless steel pipe are removed and dropped into the accommodation groove, thereby realizing the finishing operation on the inner wall of the stainless steel pipe. The rotation of the cam to different angle values enables the several groups of arc-shaped blocks to limit and fix the stainless steel pipes of different sizes, thereby realizing the finishing of the inner wall burrs of the pipes with different inner diameters and effectively improving the universality of the machine tool.

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.

[0004] 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.

[0005] 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 there is a lack of inner wall support during stamping, resulting in concave hole edges or pipe body distortion. SUMMARY

[0006] 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 portal frame arranged on the bed body, a stamping device mounted on the portal frame, and a stamping head detachably mounted on the stamping device;

[0007] A fixing frame is arranged on the bed body, the fixing frame is arranged opposite to the portal frame, and a stamping auxiliary assembly is mounted on the fixing frame;

[0008] The stamping auxiliary assembly comprises a steering mechanism, a cylindrical transmission box and a limiting mechanism, and the steering mechanism is connected with the cylindrical transmission box and the limiting mechanism;

[0009] The limiting mechanism comprises an adjusting cylinder, a receiving cylinder and a conical guide cylinder, 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 and the plurality of first guide grooves are in one-to-one correspondence and in communication with each other;

[0010] A tensioning mechanism is slidably connected in the adjusting cylinder, the tensioning mechanism comprises a positioning cylinder, a chip guiding part and a plurality of abutting parts for tensioning and supporting the inner wall of the pipe;

[0011] A cam is rotatably connected between the two groups of inner walls of the positioning cylinder, a plurality of protrusions are arranged on the cam, the plurality of protrusions are in one-to-one correspondence with the plurality of abutting parts, respectively, and a recess is arranged between every adjacent two groups of protrusions;

[0012] The abutting part comprises an arc-shaped block, a recess slot for accommodating the stamping head is formed at the top center 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;

[0013] The chip guiding part comprises an annular chip guiding cylinder, one end of the annular chip guiding cylinder is fixedly connected with the positioning cylinder, a telescopic chip guiding hose is communicated with the annular chip guiding cylinder, the other end of the telescopic chip guiding hose extends into a chip collecting box, a plurality of chip suction pipes are communicated with the side wall of the annular chip guiding cylinder, a chip discharging pipe is arranged on the side wall of the arc-shaped block, one end of the chip discharging pipe is in communication with the inside of the recess slot, the other end of the chip discharging pipe is in communication with the chip suction pipe, and a pressure sensor is arranged on the upper surface of the arc-shaped block;

[0014] The trimming part comprises a trimming blade, the bottom end of the trimming blade is fixedly connected with two groups of telescopic rods, the bottom end of the two groups of telescopic rods is fixedly connected with sliding blocks, two groups of installation grooves are symmetrically arranged on the upper surface of the arc-shaped block, the top end of the two groups of installation grooves is provided with an arc-shaped guide rail, a through groove is formed in the two groups of arc-shaped guide rails, the two groups of telescopic rods are movably attached to the corresponding group of through grooves, the inner wall of one group of installation grooves is fixedly connected with a guide shaft, the guide shaft is movably attached to one group of sliding blocks, the inner wall of the other group of installation grooves is rotatably connected with a threaded rod, the threaded rod is threadedly connected with the other group of sliding blocks, a third motor is embeddedly installed in the arc-shaped block, and the output end of the third motor is drivingly connected with one end of the threaded rod.

[0015] Further, the steering mechanism comprises two groups of fixed plates, the two groups of fixed plates are installed on the fixed frame, a worm is rotatably connected between the two groups of fixed plates, a first motor is installed on one group of fixed plates, the output end of the first motor is drivingly connected with one end of the worm, and an annular worm gear sleeve is meshingly connected on the worm.

[0016] Further, one end of the cylindrical transmission box is rotatably connected with the fixed frame, the other end of the cylindrical transmission box is fixedly connected with the limiting mechanism, an electric cylinder is installed in the cylindrical transmission box, and the output end of the electric cylinder is drivingly connected with the tensioning mechanism.

[0017] Further, a second motor is installed at the center of the other side outer wall of the positioning cylinder, a limiting groove is formed in the cam, and the output end of the second motor is drivingly connected with the center of the cam.

[0018] Further, the bottom end of the arc-shaped block is fixedly connected with a sliding shaft, a plurality of groups of sliding grooves are formed in the side wall of the positioning cylinder, the plurality of groups of sliding grooves are movably attached to the plurality of groups of sliding shafts, springs are arranged between the outer wall of the arc-shaped block and the positioning cylinder, the springs are sleeved on the sliding shafts, and rollers are installed at the bottom end of the sliding shafts.

[0019] Further, a lifting platform is arranged on the bed body, an arc-shaped supporting plate is arranged at the top end of the lifting platform, the arc-shaped supporting plate is movably attached to the stainless steel pipe, and the arc-shaped supporting plate is arranged on one side of the punching device.

[0020] Further, a scrap collecting box is further arranged on the bed body, a vacuum pump is installed on the scrap collecting box, the air inlet end of the vacuum pump extends to the inside of the scrap collecting box, and the air inlet end of the vacuum pump is provided with a dust screen.

[0021] The beneficial effects of the present application are:

[0022] 1、 through the second motor drive cam rotation, make several groups of roller fit in the limit groove moves, thereby drive several groups of slide axle synchronous to the position away from the positioning cylinder center moves, thereby make several groups of arc block synchronous with the inner wall of stainless steel pipe material contact and tension, after the completion of punching operation, the burr and broken part of the edge material produced by punching is adhered to the inner wall of stainless steel pipe material and is taken into the let position groove, through the third motor drive screw rod rotation, make the sliding block drive trimming blade fit in the upper surface of arc block moves, remove the burr and edge material adhered to the inner wall of stainless steel pipe material and drop into the let position groove, thereby realize the trimming operation to the inner wall of stainless steel pipe material, the cam rotates to different angle value, namely, several groups of arc block can limit and fix different size specifications of stainless steel pipe material, thereby realize the trimming of the inner wall burr of pipe material with different inner diameter, effectively improve the universality of the machine tool.

[0023] 2、 through the pressure sensor, the pressure value between the arc block and the inner wall of the stainless steel pipe material is monitored, and the pressure value is adjusted by cooperating with the cam rotation, so that the pressure value is kept in the preset range, so that the tensioning force of the arc block to the stainless steel pipe material meets the limit fixing of the stainless steel pipe material while avoiding excessive pressure causing the pipe wall to deform, the let position groove and the punch head are accurately positioned, the reverse supporting force is provided during punching, the pipe wall thickness deformation is reduced, the hole edge roundness is improved, the machine tool can realize punching operation on stainless steel pipe material with different pipe diameters and effectively avoid pipe deformation.

[0024] 3、 when the punch head punches the stainless steel pipe material, the punch head penetrates the inner wall of the stainless steel pipe material and moves into the let position groove, so that the debris generated by punching enters the let position groove, the vacuum pump forms negative pressure in the inside of the debris collecting box, so that negative pressure is formed in the annular debris guide cylinder connected thereto, the debris enters the annular debris guide cylinder through the debris discharge pipe, so that the debris generated by punching can be finally sucked into the debris collecting box for centralized treatment.

[0025] 4、 according to the demand, select the appropriate specification of punch head, through the first motor drive worm rotation, make annular worm gear cover drive cylindrical transmission box rotation, make storage cylinder drive tensioning mechanism synchronous rotation, make a group of abutting parts corresponding to the specification size of punch head move to the directly above, thereby the machine tool can adapt to the punching demand of different size specifications, further improve the practicability of the machine tool. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any inventive labor.

[0027] Figure 1 A schematic diagram of the main structure according to an embodiment of the present invention is shown;

[0028] Figure 2 A schematic diagram of a stamping auxiliary component structure according to an embodiment of the present invention is shown;

[0029] Figure 3 A partial structural cross-sectional view of a stamping auxiliary component according to an embodiment of the present invention is shown;

[0030] Figure 4 A schematic diagram of the tensioning mechanism structure according to an embodiment of the present invention is shown;

[0031] Figure 5 A schematic diagram of the tensioning mechanism at another angle according to an embodiment of the present invention is shown;

[0032] Figure 6 A cross-sectional view of the internal structure of the positioning cylinder according to an embodiment of the present invention is shown;

[0033] Figure 7 A schematic diagram of an arc-shaped block structure according to an embodiment of the present invention is shown;

[0034] Figure 8 A cross-sectional view of the internal structure of the arc-shaped block according to an embodiment of the present invention is shown.

[0035] In the diagram: 100, Bed; 200, Gantry frame; 300, Stamping device; 310, Stamping head; 400, Lifting platform; 500, Arc-shaped support plate; 600, Fixed frame; 700, Stamping auxiliary components; 710, Steering mechanism; 711, Fixed plate; 712, Worm gear; 713, First motor; 714, Annular worm gear sleeve; 720, Cylindrical transmission box; 721, Electric cylinder; 730, Limiting mechanism; 731, Storage cylinder; 732, Conical guide cylinder; 733, Adjusting cylinder; 734, First guide groove; 735, Second guide groove; 740, Tensioning mechanism; 741, Chip guide section; 741-1, Annular chip guide cylinder; 741-2, Telescopic chip guide. Hose; 741-3, Chip suction tube; 742, Positioning cylinder; 742-1, Slide groove; 743, Contact part; 743-1, Arc block; 743-2, Slide shaft; 743-3, Spring; 743-4, Roller; 743-5, Clearance groove; 743-6, Chip discharge tube; 743-7, Pressure sensor; 743-8, Mounting groove; 743-9, Arc guide rail; 744, Second motor; 745, Cam; 745-1, Limiting groove; 746, Dressing part; 746-1, Dressing blade; 746-2, Telescopic rod; 746-3, Slider; 746-4, Threaded rod; 746-5, Third motor; 800, Chip collection box; 900, Vacuum pump. Detailed Implementation

[0036] 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.

[0037] The embodiment of the present application provides a numerical control machine tool for directional stamping and finishing of stainless steel pipes, which comprises a bed body 100. Figure 1 As shown in the figure.

[0038] 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.

[0039] 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 needs of different specifications.

[0040] The bed body 100 is also provided with a scrap collecting box 800, the scrap 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 scrap collecting box 100, and the air inlet end of the vacuum pump 900 is provided with a dust screen.

[0041] Specifically, the vacuum pump 900 forms negative pressure in the inside of the scrap collecting box 800, so that the debris generated by the punching process can be sucked into the scrap collecting box 800 for centralized treatment.

[0042] As shown in the figure. Figures 2-6 As shown in the figure.

[0043] 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, the two groups of the fixed plates 711 are rotationally connected with a worm 712, 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;

[0044] One end of the cylindrical transmission box 720 is rotationally 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;

[0045] 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;

[0046] 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;

[0047] The center of one side outer wall of the positioning cylinder 742 is in transmission connection with the output end of the electric cylinder 721, the center of the other side outer wall of the positioning cylinder 742 is provided with a second motor 744, the two groups of inner walls of the positioning cylinder 742 are rotationally connected with a cam 745, a plurality of groups of protrusions are arranged on the cam 745, a plurality of groups of the protrusions correspond to a plurality of groups of abutting portions 743 one by one, a plurality of recesses are arranged between every adjacent two groups of protrusions, a limiting groove 745-1 is formed in the cam 745, and the output end of the second motor 744 is in transmission connection with the center of the cam 745.

[0048] The plurality of groups of abutting portions 743 are arranged in a ring array with the central axis of the positioning cylinder 742 as the center, the abutting portion 743 comprises an arc-shaped block 743-1, the top end of the arc-shaped block 743-1 abuts against the inner wall of the stainless steel pipe, the bottom end of the arc-shaped block 743-1 is fixedly connected with a sliding shaft 743-2, a plurality of groups of sliding grooves 742-1 are formed in the side wall of the positioning cylinder 742, a plurality of groups of the sliding grooves 742-1 are movably attached to a plurality of groups of the sliding shafts 743-2, a spring 743-3 is arranged between the arc-shaped block 743-1 and the outer wall of the positioning cylinder 742, the spring 743-3 is sleeved on the sliding shaft 743-2, and a roller 743-4 is arranged at the bottom end of the sliding shaft 743-2 and movably attached to the inner wall of the limiting groove 745-1.

[0049] Specifically, in the initial state, a plurality of groups of the rollers 743-4 are attached in 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, one group of the abutting portions 743 moves to the position directly above, the stainless steel pipe is sleeved on the adjusting cylinder 733, and the position to be processed moves to the position directly below the punching head 310, the electric cylinder 721 drives the tensioning mechanism 740 to move to the position to be processed in the stainless steel pipe, the second motor 744 drives the cam 745 to rotate, a plurality of groups of the rollers 743-4 are attached in the limiting grooves 745-1 and move, thereby driving a plurality of groups of the sliding shafts 743-2 to move away from the center of the positioning cylinder 742, so that a plurality of groups of the arc-shaped blocks 743-1 are in contact with and tensioned with the inner wall of the stainless steel pipe, and the cam 745 is rotated to different angle values, so that a plurality of groups of the arc-shaped blocks 743-1 can limit and fix the stainless steel pipes of different sizes, and the stainless steel pipe is prevented from deviating during the punching operation.

[0050] Further, the arc-shaped block 743-1 located directly above the position of the stainless steel pipe material that needs to be punched is in contact with the position, and the punching position is supported by the arc-shaped block 743-1, effectively avoiding the concave deformation of the pipe wall of the stainless steel pipe material during punching.

[0051] As shown in the examples Figure 7 and Figure 8 .

[0052] The top center of the arc-shaped block 743-1 is provided with a let-out slot 743-5, and the size of the let-out slot 743-5 is consistent with the punching head 310. The sizes of the let-out slots 743-5 in the arc-shaped blocks 743-1 are different, and the sizes of the let-out slots 743-5 are consistent with the sizes of different punching heads 310. 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-out slot 743-5, and the other end of the chip removal pipe 743-6 is connected with the chip suction pipe 741-3. The upper surface of the arc-shaped block 743-1 is provided with a pressure sensor 743-7.

[0053] Specifically, the pressure value between the arc-shaped block 743-1 and the inner wall of the stainless steel pipe material is monitored by the pressure sensor 743-7, and the pressure value is adjusted by cooperating with the rotation of the cam 745, so that the pressure value is kept in a predetermined range, so that the tension of the arc-shaped block 743-1 to the stainless steel pipe material meets the limiting and fixing of the stainless steel pipe material while avoiding the deformation of the pipe wall caused by excessive pressure. When the punching head 310 punches the stainless steel pipe material, the punching head 310 penetrates the inner wall of the stainless steel pipe material and moves into the let-out slot 743-5, so that the debris generated by punching enters the let-out slot 743-5, and 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.

[0054] The arc-shaped block 743-1 is provided with a trimming part 746, the trimming part 746 comprises 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 the two groups of telescopic rods 746-2 is fixedly connected with a sliding block 746-3, the arc-shaped block 743-1 is symmetrically provided with two groups of mounting grooves 743-8, the top end of the two groups of mounting grooves 743-8 is provided with an arc-shaped guide rail 743-9, the two groups of arc-shaped guide rails 743-9 are both provided with a through groove, the two groups of telescopic rods 746-2 are movably attached to the corresponding group of through grooves, the inner wall of a group of mounting grooves 743-8 is fixedly connected with a guide shaft, the guide shaft is movably attached to a group of sliding blocks 746-3, the inner wall of the other group of mounting 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, 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 in transmission connection with one end of the threaded rod 746-4.

[0055] Specifically, after the punching operation is completed, the burrs and broken edge scraps generated by punching are adhered to the inner wall of the stainless steel pipe and are brought into the accommodation groove 743-5, the threaded rod 746-4 is driven to rotate by the third motor 746-5, the sliding block 746-3 drives the trimming blade 746-1 to move and attach to the upper surface of the arc-shaped block 743-1, the burrs and edge scraps adhered to the inner wall of the stainless steel pipe are removed and fall into the accommodation groove 743-5, so that the trimming operation on the inner wall of the stainless steel pipe is realized.

[0056] 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:

[0057] 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, so that the stainless steel pipe can be sleeved on the punching auxiliary assembly 700.

[0058] In the initial state, a plurality of groups 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 stainless steel pipe is sleeved on the adjusting cylinder 733, and the position to be processed is moved to the position directly below the stamping head 310, the appropriate specification of the stamping head 310 is selected according to the requirements, 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, and a group of abutting parts 743 corresponding to the specification and size of the stamping head 310 moves to the position directly above.

[0059] The tensioning mechanism 740 is moved to the position to be processed inside the stainless steel pipe by the electric cylinder 721, the cam 745 is rotated by the second motor 744, a plurality of groups of rollers 743-4 are moved to be attached to the limiting grooves 745-1, thereby driving a plurality of groups of sliding shafts 743-2 to move synchronously away from the center of the positioning cylinder 742, thereby enabling a plurality of groups 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, a plurality of groups of arc-shaped blocks 743-1 can limit and fix stainless steel pipes of different sizes and specifications, avoid the stainless steel pipe from deviating during the punching operation, and monitor the pressure value between the arc-shaped block 743-1 and the inner wall of the stainless steel pipe by the pressure sensor 743-7, adjust the pressure value by rotating the cam 745, and keep the pressure value within the preset range, so that the tensioning force of the arc-shaped block 743-1 on the stainless steel pipe meets the requirements of limiting and fixing the stainless steel pipe while avoiding excessive pressure from causing the pipe wall to deform.

[0060] The stainless steel pipe is punched and opened by the stamping head 310 on the stamping device 300, the arc-shaped block 743-1 directly above abuts against the position of the stainless steel pipe to be punched, and the arc-shaped block 743-1 supports the position to be punched, effectively avoiding the pipe wall of the stainless steel pipe from being concave and deformed during the punching process.

[0061] 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 to the accommodation groove 743-5, the debris generated by the stamping enters the accommodation groove 743-5, the vacuum pump 900 forms a negative pressure in the inside of the debris collecting box 800, thereby forming a negative pressure in the annular debris guide cylinder 741-1 connected thereto, the debris enters the annular debris guide cylinder 741-1 through the debris suction pipe 741-3 through the debris discharge pipe 743-6, and the debris generated by the punching process can be finally sucked into the debris collecting box 800 for centralized treatment.

[0062] 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 clearance 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 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 clearance groove 743-5, so that the trimming operation on the inner wall of the stainless steel pipe is realized.

[0063] 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 still be modified, or some technical features can be replaced by equivalent features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A numerical control machine tool for directional press finishing of stainless steel pipe, comprising a bed body, characterized in that: The bed body is provided with a portal frame, a punching device is installed on the portal frame, and a punching head is detachably installed on the punching device; The bed body is provided with a fixing frame, the fixing frame is arranged opposite to the portal frame, and a punching auxiliary assembly is installed on the fixing frame; The punching auxiliary assembly comprises a turning mechanism, a cylindrical transmission box and a limiting mechanism, and the turning mechanism is connected with the cylindrical transmission box and the limiting mechanism; The limiting mechanism comprises an adjusting cylinder, a receiving cylinder and a conical guide cylinder, 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 groups of first guide grooves are formed in the conical guide cylinder, a plurality of groups of second guide grooves are formed in the adjusting cylinder, and the plurality of groups of second guide grooves correspond to and communicate with the plurality of groups of first guide grooves; A tensioning mechanism is slidably connected in the adjusting cylinder, 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 correspond to and are in one-to-one correspondence with the plurality of groups of abutting parts, and a recess is arranged between every adjacent two groups of protrusions; The abutting part comprises an arc-shaped block, a recess slot for accommodating the punching head is formed at the top center of the arc-shaped block, and a trimming part for cutting burrs and corner scraps generated by punching is arranged on the arc-shaped block; The chip guiding part comprises an annular chip guiding cylinder, one end of the annular chip guiding cylinder is fixedly connected with the positioning cylinder, an expandable chip guiding hose is connected to the annular chip guiding cylinder, the other end of the expandable chip guiding hose extends into a chip collecting box, a plurality of groups of chip suction pipes are connected to the side wall of the annular chip guiding cylinder, a chip discharging pipe is arranged on the side wall of the arc-shaped block, one end of the chip discharging pipe is connected to the inside of the recess slot, the other end of the chip discharging pipe is connected to the chip suction pipe, and a pressure sensor is arranged on the upper surface of the arc-shaped block; The trimming part comprises a trimming blade, the trimming blade is movably attached to the upper surface of the arc-shaped block, two groups of expandable rods are fixedly connected to the bottom end of the trimming blade, two groups of sliding blocks are fixedly connected to the bottom end of the two groups of expandable rods, two groups of installation grooves are symmetrically formed on the arc-shaped block, arc-shaped guide rails are arranged at the top end of the two groups of installation grooves, through grooves are formed in the two groups of arc-shaped guide rails, the two groups of expandable rods are movably attached to the corresponding one group of through grooves, a guide shaft is fixedly connected to the inner wall of one group of installation grooves, the guide shaft is movably attached to one group of sliding blocks, a threaded rod is rotatably connected to the inner wall of the other group of installation grooves, the threaded rod is threadedly connected to the other group of sliding blocks, a third motor is embeddedly installed in the inside of the arc-shaped block, and the output end of the third motor is drivingly connected to one end of the threaded rod.

2. The numerical control machine tool for the directional press finishing of stainless steel pipes according to claim 1, characterized in that: The steering mechanism comprises two groups of fixed plates, both of which are installed on a fixed frame, and a worm is rotationally connected between the two groups of fixed plates, a first motor is installed on one group of the fixed plates, the output end of the first motor is in transmission connection with one end of the worm, an annular worm gear sleeve is in meshing connection with the worm, and the annular worm gear sleeve is sleeved on a cylindrical transmission box.

3. The numerical control machine tool for the directional press finishing of stainless steel pipes according to claim 2, characterized in that One end of the cylindrical transmission box is in rotation connection with the fixed frame, the other end of the cylindrical transmission box is in fixed connection with a limiting mechanism, an electric cylinder is installed in the cylindrical transmission box, and the output end of the electric cylinder is in transmission connection with a tensioning mechanism.

4. The numerical control machine tool for the directional press finishing of stainless steel pipes according to claim 1, characterized in that: A second motor is installed at the center of the other side outer wall 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.

5. The numerical control machine tool for the directional press finishing of stainless steel pipes according to claim 1, characterized in that: The bottom end of the arc-shaped block is fixedly connected with a sliding shaft, a plurality of groups of sliding grooves are formed in the side wall of the positioning cylinder, a plurality of groups of the sliding grooves are movably attached to a plurality of groups of the sliding shafts, springs are arranged between the arc-shaped block and the outer wall of the positioning cylinder, the springs are sleeved on the sliding shafts, and rollers are installed at the bottom end of the sliding shafts.

6. The numerical control machine tool for the directionally press working of stainless steel pipe according to claim 1, characterized in that: 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 attached to the stainless steel pipe, and the arc-shaped supporting plate is arranged on one side of the punching device.

7. The numerical control machine tool for the directionally press-trim machining of stainless steel pipe according to claim 1, characterized by: The bed body is also provided with a scrap collecting box, a vacuum pump is installed on the scrap collecting box, the air inlet end of the vacuum pump extends to the inside of the scrap collecting box, and the air inlet end of the vacuum pump is provided with a dust screen.

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