Multi-knife sawing machine pipe anti-chasing positioning device

Abstract

This invention discloses a pipe fitting anti-migration positioning device for a multi-blade sawing machine, belonging to the technical field of positioning devices. It includes a sawing machine body with a first driving component on its surface, a chuck assembly disposed on the surface of the sawing machine body, and a hydraulic chuck disposed on the surface of the sawing machine body, and a slide seat disposed on one side of the hydraulic chuck. This invention employs a three-jaw opening clamping method, allowing the pipe fitting to autonomously fine-tune its position to complete eccentric correction and self-centering alignment. It avoids alignment deviations caused by rigid clamping and forced pulling of the pipe fitting, ensuring accurate pipe fitting center reference, effectively limiting axial and circumferential movement of the pipe fitting, significantly improving the flatness of the pipe cut, and ensuring sawing quality. The chuck is locked synchronously during clamping, greatly improving the safety factor of the equipment operation. Lateral anti-migration components, in conjunction with guide wheels, form multi-point circumferential limiting, comprehensively constraining the pipe fitting's sway amplitude, further enhancing positioning stability.

Description

Technical Field

[0001] This invention relates to the field of positioning device technology, and in particular to a positioning device for preventing pipe movement on a multi-blade sawing machine tool. Background Technology

[0002] The multi-blade sawing machine's pipe positioning device is a core clamping device in the pipe sawing process. It is mainly used to clamp and fix tubular workpieces, limit the workpiece processing position, and ensure the orderly progress of the sawing process. Traditional clamping and positioning structures can meet the basic clamping and fixing needs of pipes under normal working conditions. However, the continuous vibration generated during the sawing process has raised the standards for the pipe clamping centering accuracy, anti-movement ability, and clamping safety protection performance.

[0003] During pipe sawing operations, the equipment will generate continuous vibration. Currently, conventional pipe positioning devices mostly adopt rigid clamping contact, which makes it difficult for the workpiece to complete eccentric correction and self-centering during the clamping process. The central reference of the pipe is prone to deviation, and the workpiece is prone to axial and circumferential movement during processing. This is not conducive to ensuring the flatness and quality of the pipe cut. Moreover, each time the pipe is fixed, it needs to be repositioned, making the operation steps cumbersome. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the above and / or existing anti-movement positioning devices for pipe fittings of multi-blade sawing machine tools, the present invention is proposed.

[0006] Therefore, the problem that this invention aims to solve is that the use of rigid clamping contact forms makes it difficult for the workpiece to autonomously complete eccentricity correction and self-centering during the clamping process, and repositioning is required every time the pipe is fixed.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a multi-blade sawing machine tool pipe fitting anti-slip positioning device, comprising: a sawing machine tool body, on which a first driving member is provided; a chuck assembly, disposed on the surface of the sawing machine tool body, comprising: a hydraulic chuck, disposed on the surface of the sawing machine tool body; a slide, disposed on one side of the hydraulic chuck; a locking groove, formed on the surface of the slide; a chuck, slidably connected to the inner cavity of the slide; a roller fixed to one side of the chuck; a support base, fixed to the surface of the chuck; lateral anti-slip members, disposed on both sides of the support base; a backstop member, disposed on the surface of the chuck; a locking member, disposed on the surface of the chuck; and a rolling member, disposed on the surface of the support base. The chuck is opened under hydraulic pressure, and the rolling member first contacts the pipe fitting for anti-slip protection. The locking member is used to lock the chuck, and the backstop member is used to unlock the rolling member by braking it.

[0008] As a preferred embodiment of the anti-slip positioning device for pipe fittings of the multi-blade sawing machine tool described in this invention, the first driving component includes: a first motor, fixed to one side of the sawing machine tool body; a first lead screw, rotatably connected to the surface of the sawing machine tool body; a first lead screw sleeve, sleeved on the surface of the first lead screw; a slide, fixed to the top of the first lead screw sleeve; and a first synchronous belt is provided between the output end of the first motor and the first lead screw sleeve.

[0009] As a preferred embodiment of the anti-slip positioning device for pipe fittings of the multi-blade sawing machine tool of the present invention, wherein: a housing is fixed on the surface of the main body of the sawing machine tool, a rotary cylinder is fixed on one side of the housing, a push-pull rod is fixed at the output end of the rotary cylinder, and a frustum is fixed at one end of the push-pull rod.

[0010] As a preferred embodiment of the anti-slip positioning device for pipe fittings of the multi-blade sawing machine tool of the present invention, wherein: a first mounting cavity is provided on both sides of the support base, and a second mounting cavity is provided on both sides of the support base and on the side of the first mounting cavity; a second wedge block is slidably connected to the inner cavity of the first mounting cavity; a tension spring is fixed on the surface of the second wedge block; and one end of the tension spring is fixed to the inner wall of the first mounting cavity.

[0011] As a preferred embodiment of the anti-slip positioning device for pipe fittings of the multi-blade sawing machine tool described in this invention, the lateral anti-slip component includes: a sliding sleeve fixed to both sides of the support base; a sliding rod slidably connected to the inner cavity of the sliding sleeve, one end of which is fixed with an elastic top head, and the other end of which is fixed with a first wedge block; a first spring is sleeved on the outer ring of the sliding rod, one end of which is fixed to the surface of the first wedge block, and the other end of which is fixed to the surface of the sliding sleeve.

[0012] As a preferred embodiment of the anti-slip positioning device for pipe fittings of the multi-blade sawing machine tool described in this invention, the anti-slip component includes: a fixed base fixed to the surface of the chuck, a small cylinder fixed to the surface of the fixed base, a connecting plate fixed to the output end of the small cylinder, a sliding plate fixed to both ends of the connecting plate, and an anti-slip inclined block fixed to the surface of the sliding plate.

[0013] As a preferred embodiment of the anti-slip positioning device for pipe fittings of the multi-blade sawing machine tool described in this invention, the locking component includes: a push frame, slidably connected to the inner cavity of the support base; a limiting frame, fixed to the inner cavity of the chuck; an elastic airbag, fixed inside the limiting frame; an air outlet pipe, connecting both sides of the elastic airbag; a one-way valve, installed on the surface of the air outlet pipe; a branch pipe, connected to the outlet end of the one-way valve; and an air storage cylinder, fixed to the outer wall of the chuck, which is connected to one end of the branch pipe via a pipe.

[0014] As a preferred embodiment of the anti-slip positioning device for pipe fittings of the multi-blade sawing machine tool described in this invention, the locking component further includes: a locking rod, slidably connected to the inner cavity of the air storage cylinder; a third spring, sleeved on the surface of the locking rod, one end of which extends through to the outside of the air storage cylinder, and the other end of which is fixed with a piston, the piston and the inner wall of the air storage cylinder being slidably sealed; an electric exhaust valve, fixed to the air outlet end of the branch pipe; and a triggering wedge, fixed to both sides of the push frame.

[0015] As a preferred embodiment of the anti-slip positioning device for pipe fittings of the multi-blade sawing machine tool described in this invention, the rolling element includes: a sliding block slidably connected to the inner cavity of the first mounting cavity; a guide wheel fixedly and rotatably connected to the surface of the sliding block; a limiting sleeve fixed to the surface of the sliding block; a wedge rod slidably connected to the inner cavity of the limiting sleeve; a second spring fixed to the surface of the limiting sleeve, with one end fixed to the surface of the wedge rod; a brake pad fixed to one end of the wedge rod; a spring piece, with one end fixed to the surface of the sliding block and the other end fixed to the inner cavity of the first mounting cavity; and a limiting block fixed to both sides of the sliding block.

[0016] As a preferred embodiment of the anti-slip positioning device for pipe fittings of the multi-blade sawing machine tool described in this invention, the outer ring of the guide wheel is fixedly sleeved with an anti-slip rubber ring, and the inner wall of the first mounting cavity is provided with a sliding groove that cooperates with the sliding block.

[0017] The beneficial effects of this invention are as follows: This invention adopts a three-jaw opening clamping method. In the initial clamping stage, the guide wheel makes rolling contact with the inner wall of the pipe, replacing the traditional hard sliding friction with rolling friction. The pipe can autonomously adjust its position to complete eccentric correction and self-centering. It will not cause alignment deviation due to rigid clamping and forced pulling of the pipe, ensuring the accuracy of the pipe's center reference. After clamping, the guide wheel is automatically braked through the inclined plane linkage structure, changing the rolling contact to a friction locking state. The three-point force has no clamping play, which can strongly resist the vibration generated by sawing, effectively limit the axial and circumferential movement of the pipe, significantly improve the flatness of the pipe cut, and ensure the quality of sawing.

[0018] The clamping process is simultaneously triggered by the airbag pressure locking mechanism. The locking rod is engaged in the locking groove to achieve mechanical limit of the chuck. Even if the rotary cylinder has an oil leakage and pressure relief failure, it can firmly fix the opening and closing range of the chuck, prevent the chuck from loosening and the pipe from falling, and greatly improve the safety factor of the equipment operation.

[0019] Lateral anti-slip components, together with guide wheels, form multi-point encircling and limiting, comprehensively constraining the swaying amplitude of the pipe fitting, further enhancing positioning stability. After processing, the roller braking constraint can be quickly released by a small cylinder, thus completing the disassembly and assembly of the pipe fitting. There is no need to recalibrate and center each time the material is loaded, which greatly reduces the time spent on workpiece adjustment and effectively improves the efficiency of batch sawing production of pipe fittings. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is a structural diagram of a positioning device for preventing pipe movement on a multi-blade sawing machine.

[0022] Figure 2 This is a side view of the anti-slip positioning device for pipe fittings on a multi-blade sawing machine.

[0023] Figure 3 This is a structural diagram of the chuck assembly of the anti-slip positioning device for pipe fittings on a multi-blade sawing machine.

[0024] Figure 4 This is a partial structural diagram of the chuck assembly of the anti-slip positioning device for pipe fittings on a multi-blade sawing machine.

[0025] Figure 5 This is a partial side view of the chuck assembly of the anti-slip positioning device for pipe fittings on a multi-blade sawing machine.

[0026] Figure 6The diagram shows the top view of the rolling element of the anti-slip positioning device for pipe fittings on a multi-blade sawing machine.

[0027] Figure 7 Anti-slip positioning device for pipe fittings of multi-blade sawing machine Figure 6 A magnified view of A in the middle.

[0028] Figure 8 This is a structural diagram of the anti-rollback component of the anti-rollback positioning device for pipe fittings on a multi-blade sawing machine.

[0029] Figure 9 Anti-slip positioning device for pipe fittings of multi-blade sawing machine Figure 5 Sectional view of AA.

[0030] In the diagram: 1. Sawing machine body; 2. First drive component; 21. First motor; 22. First lead screw; 23. First lead screw sleeve; 24. Slide table; 25. First synchronous belt; 3. Rotary cylinder; 4. Housing; 5. Push-pull rod; 6. Frustum; 7. Claw assembly; 71. Hydraulic chuck; 72. Slide seat; 721. Locking groove; 73. Roller; 74. Claw; 75. Lateral anti-slip component; 751. Slide sleeve; 752. Slide rod; 753. Elastic top; 754. First wedge block; 755. First spring; 76. Support seat; 761. First mounting cavity; 762. Second wedge block; 763. Tension spring; 764. Second mounting cavity; 77. Anti-reverse component; 771. Fixed seat; 772. Small cylinder 773. Connecting plate; 774. Slide plate; 775. Anti-reverse ramp; 78. Locking component; 781. Push frame; 782. Limiting frame; 783. Elastic airbag; 784. Air outlet pipe; 785. One-way valve; 786. Third spring; 787. Locking rod; 788. Branch pipe; 789. Air tank; 7810. Electric exhaust valve; 7811. Trigger ramp; 79. Rolling component; 791. Sliding block; 792. Guide wheel; 793. Limiting sleeve; 794. Wedge rod; 795. Second spring; 796. Brake pad; 797. Limiting block; 798. Spring piece; 8. Sawing assembly; 9. Second drive component; 91. Second motor; 92. Second lead screw; 93. Second lead screw sleeve; 94. Moving seat. 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] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0034] Example 1, referring to Figure 1 and Figure 2 This is the first embodiment of the present invention. This embodiment provides a multi-blade sawing machine tool pipe anti-slip positioning device, which includes a hydraulic chuck 71, a slide 72, a chuck 74, a lateral anti-slip component 75, a backstop component 77, a locking component 78, and a rolling component 79.

[0035] Specifically, the sawing machine body 1 has a first driving member 2 and a jaw assembly 7 on its surface, which includes: a hydraulic chuck 71 on the surface of the sawing machine body 1, a slide 72 on one side of the hydraulic chuck 71, a locking groove 721 on the surface of the slide 72, a jaw 74 slidably connected to the inner cavity of the slide 72, a roller 73 fixed to one side of the jaw 74, and a support seat 76 fixed to the surface of the jaw 74.

[0036] Furthermore, the hydraulic chuck 71 and jaws 74 are both forged from 40Cr alloy structural steel, which is impact-resistant and not easily deformed under clamping force. The slide 72 is made of tempered carbon steel, and the locking groove 721 is quenched, which is wear-resistant and does not reduce the positioning accuracy. The wheel cores of the roller 73 and guide wheel 792 are both made of 45# carbon steel, and the outer ring is covered with an oil-resistant nitrile anti-slip rubber ring, which fits the pipe wall to prevent slipping and shock absorption without damaging the surface of the pipe fitting.

[0037] Specifically, the lateral anti-slip component 75 is disposed on both sides of the support base 76, the anti-reverse component 77 is disposed on the surface of the pawl 74, the locking component 78 is disposed on the surface of the pawl 74, and the rolling component 79 is disposed on the surface of the support base 76. The pawl 74 is opened under hydraulic pressure, and the rolling component 79 first contacts the pipe to provide anti-slip protection. The locking component 78 is used to lock the pawl 74, and the anti-reverse component 77 is used to unlock the rolling component 79 by braking it.

[0038] Example 2, refer to Figures 2-9 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0039] Specifically, it also includes the following: the first driving component 2 includes: a first motor 21, fixed to one side of the sawing machine body 1; a first lead screw 22, rotatably connected to the surface of the sawing machine body 1; a first lead screw sleeve 23, sleeved on the surface of the first lead screw 22; a slide table 24, fixed to the top of the first lead screw sleeve 23; and a first synchronous belt 25 is provided between the output end of the first motor 21 and the first lead screw sleeve 23.

[0040] Specifically, a housing 4 is fixed to the surface of the main body 1 of the sawing machine tool, a rotary cylinder 3 is fixed to one side of the housing 4, a push-pull rod 5 is fixed to the output end of the rotary cylinder 3, and a frustum 6 is fixed to one end of the push-pull rod 5.

[0041] Specifically, a first mounting cavity 761 is provided on both sides of the support base 76, and a second mounting cavity 764 is provided on both sides of the support base 76 and on the side of the first mounting cavity 761. A second wedge block 762 is slidably connected to the inner cavity of the first mounting cavity 761, and a tension spring 763 is fixed on the surface of the second wedge block 762. One end of the tension spring 763 is fixed to the inner wall of the first mounting cavity 761.

[0042] Specifically, the lateral anti-slip component 75 includes: a sliding sleeve 751, fixed to both sides of the support base 76; a sliding rod 752, slidably connected to the inner cavity of the sliding sleeve 751, with an elastic top 753 fixed at one end and a first wedge block 754 fixed at the other end; a first spring 755 is sleeved on the outer ring of the sliding rod 752, with one end of the first spring 755 fixed to the surface of the first wedge block 754 and the other end fixed to the surface of the sliding sleeve 751.

[0043] Furthermore, both the sliding sleeve 751 and the sliding rod 752 are made of 304 stainless steel optical shaft, which is rust-proof and corrosion-resistant, and has low reciprocating sliding resistance. The elastic head 753 is made of highly elastic wear-resistant rubber material, which flexibly fits the inner wall of the pipe fitting, limiting the position while avoiding squeezing and damaging the pipe wall.

[0044] Furthermore, the lateral anti-slip component 75 relies on the displacement linkage inclined plane transmission of the claw 74 to drive the slide rod 752 and the elastic mandrel 753 to extend and retract. Multiple mandrels are arranged around the inner wall of the pipe to form a ring-shaped limiting structure, which laterally assists in restraining the swaying amplitude of the pipe. Together with the clamping structure of the guide wheel 792, it forms a double limiting, which completely prevents the workpiece from shifting during the processing, further improving the flatness of the cut and the accuracy of the processing dimensions.

[0045] Specifically, the anti-reverse component 77 includes: a fixed base 771, fixed to the surface of the claw 74, made of carbon steel stamping sheet, which is firmly installed and fixed; a small cylinder 772, fixed to the surface of the fixed base 771, made of compact aluminum alloy cylinder body, which is resistant to oil stain corrosion and has sensitive response to extension and retraction; a connecting plate 773, fixed to the output end of the small cylinder 772; a sliding plate 774, fixed to both ends of the connecting plate 773; and an anti-reverse inclined block 775, fixed to the surface of the sliding plate 774. Both the connecting plate 773 and the sliding plate 774 are made of high-strength glass fiber engineering plastic, which is lightweight and wear-resistant, and the transmission is smooth.

[0046] Furthermore, the anti-reverse component 77 uses a small cylinder 772 as a power source to drive the anti-reverse inclined block 775 to move back and forth. Through inclined surface extrusion and disengagement, it controls the switching of the braking state of the rolling component 79. The structural linkage logic is simple. After processing, the braking constraint of the guide wheel 792 can be quickly released. The pipe fitting is easy to disassemble and assemble, and there is no need to repeatedly calibrate the centering reference. This effectively reduces the workpiece loading and unloading adjustment time and improves the efficiency of mass production.

[0047] Specifically, the locking component 78 includes: a push frame 781, slidably connected to the inner cavity of the support base 76; a limiting frame 782, fixed to the inner cavity of the claw 74; an elastic airbag 783, fixed inside the limiting frame 782, made of high-pressure resistant and oil-resistant nitrile rubber, with uniform deformation under pressure, excellent air tightness, and suitable for vibration storage conditions; an air outlet pipe 784, connecting both sides of the elastic airbag 783; a one-way valve 785, installed on the surface of the air outlet pipe 784; a branch pipe 788, connected to the outlet end of the one-way valve 785; and an air storage cylinder 789, fixed to the outer wall of the claw 74, which is connected to one end of the branch pipe 788 through a pipe, made of seamless carbon steel pipe, pressure resistant for air storage, and with anti-corrosion and anti-rust treatment on the inner wall.

[0048] Furthermore, the push frame 781 and the limit frame 782 are both made of carbon steel stamping, with sufficient structural rigidity and no deformation under pressure. The air outlet pipe 784 and the branch pipe 788 are both made of high-pressure PU air pipe, which is resistant to bending and aging, and there is no leakage in gas transmission. The one-way valve 785 and the electric exhaust valve 7810 are both made of stainless steel miniature valve bodies, which are resistant to oil stains and blockage, and have reliable opening and closing action.

[0049] Specifically, the locking component 78 also includes: a locking rod 787, which is slidably connected to the inner cavity of the air reservoir 789, made of 45# quenched carbon steel with a mirror-polished surface, ensuring smooth sliding and precise positioning; a third spring 786, which is sleeved on the surface of the locking rod 787, with one end extending through to the outside of the air reservoir 789 and the other end fixed with a piston, wherein the piston and the inner wall of the air reservoir 789 are provided with a sliding seal, and the piston is made of an aluminum alloy base with a fluororubber sealing ring, ensuring a tight sliding seal and good pressure retention; an electric exhaust valve 7810, which is fixed to the outlet end of the branch pipe 788; and a triggering block 7811, which is fixed to both sides of the pusher frame 781.

[0050] Specifically, the rolling element 79 includes: a sliding block 791, slidably connected to the inner cavity of the first mounting cavity 761; a guide wheel 792, fixedly and rotatably connected to the surface of the sliding block 791; a limiting sleeve 793, fixed to the surface of the sliding block 791; a wedge rod 794, slidably connected to the inner cavity of the limiting sleeve 793; a second spring 795, fixed to the surface of the limiting sleeve 793, with one end fixed to the surface of the wedge rod 794; a brake pad 796, fixed to one end of the wedge rod 794, made of high-friction metallurgical wear-resistant material, with large braking clamping force and not easily worn by repeated braking; a spring 798, with one end fixed to the surface of the sliding block 791 and the other end fixed to the inner cavity of the first mounting cavity 761; and a limiting block 797, fixed to both sides of the sliding block 791.

[0051] Specifically, the outer ring of the guide wheel 792 is fixedly fitted with an anti-slip rubber ring, and the inner wall of the first mounting cavity 761 is provided with a sliding groove that cooperates with the sliding block 791.

[0052] Example 3, referring to Figures 2-9 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0053] Specifically, one end of the push frame 781 is slidably connected to the inner wall of the limit frame 782, and the push frame 781 is rotatably connected to the rotating shaft of the guide wheel 792. The spring 798, tension spring 763 and each spring are made of 65Mn spring steel, which provides elastic limiting stability and resists repeated deformation fatigue.

[0054] Specifically, the second driving component 9 includes: a second motor 91, fixed to the surface of the sawing machine body 1; a second lead screw 92, fixed to the output end of the second motor 91; a second lead screw sleeve 93, sleeved on the outer ring of the second lead screw 92; and a movable seat 94, fixed to the top of the second lead screw sleeve 93. The top of the movable seat 94 is fixed with the sawing assembly 8.

[0055] Specifically, the sawing assembly 8 includes: a third motor, fixed to the top of the movable base 94, and a saw blade, located at the output end of the third motor.

[0056] Specifically, the inclined surface of the first wedge block 754 corresponds to the inclined surface of the triggering wedge block 7811, the inclined surface of the wedge rod 794 corresponds to one side of the inclined surface of the second wedge block 762, and the inclined surface of the anti-reverse wedge block 775 corresponds to the other side of the inclined surface of the second wedge block 762.

[0057] Specifically, a return spring is provided between the slide 72 and the pawl 74, which can automatically reset the roller 73 on one side of the pawl 74 when it is not squeezed by the truncated cone 6.

[0058] Specifically, a miniature pressure stabilizing valve is installed at the air inlet of the 789 air tank to stabilize the internal stored air pressure, and a sealing and reinforcing sleeve is added to the pipe joint to reduce leakage caused by vibration and ensure constant locking force.

[0059] Specifically, a fine-adjustment elastic clamping structure is added to the back of the brake pad 796 to automatically compensate for wear gaps and always keep the brake pad 796 in close contact with the guide wheel 792, ensuring stable braking performance over long-term use.

[0060] Specifically, a manual mechanical pin backup locking mechanism is added to the chuck 74. In case of pneumatic system failure, the chuck 74 can be manually locked by the pin, forming a double emergency protection.

[0061] When in use, the main body 1 of the sawing machine is in an unloaded standby state, the pipe is not loaded and clamped, the rotary cylinder 3 does not output power, the push-pull rod 5 and the truncated cone 6 are in the initial position, the pawl 74 is retracted to the inside of the slide block 72 by the return spring, the guide wheel 792 of the rolling element 79 can rotate freely, the brake pad 796 is separated from the guide wheel 792, and the elastic top 753 of the lateral anti-slip element 75 is in a retracted state and does not extend outward.

[0062] The internal elastic air bladder 783 of the locking component 78 has no compression deformation, the air storage cylinder 789 is at normal pressure, the locking rod 787 retracts into the cavity and is not locked into the locking groove 721, the first driving component 2, the second driving component 9 and the sawing component 8 all remain stationary, and the overall structure is ready to receive pipe fitting processing.

[0063] The pipe fitting to be cut is placed on the outside of the hydraulic chuck 71 with the inner wall of the pipe fitting facing the jaw assembly 7, completing the initial placement of the workpiece. Wait for the centering and clamping action to start. Start the rotary cylinder 3. The rotary cylinder 3 drives the push-pull rod 5 and the truncated cone 6 to move smoothly. The side wall of the truncated cone 6 contacts the roller 73 on one side of the jaw 74, gradually pushing the jaw 74 outward along the inner cavity of the slide block 72.

[0064] During the movement of the chuck 74, the support base 76 and the rolling element 79 expand outwards simultaneously. The guide wheel 792 first comes into contact with the inner wall of the pipe. At this time, the guide wheel 792 remains in a free rotation state and comes into contact with the pipe wall in the form of rolling friction. The pipe can autonomously adjust its position to complete self-centering and eccentric correction. There is no rigid resistance in the initial clamping stage. It can automatically match the center position of the pipe and avoid forced clamping that causes the pipe to shift or misalign.

[0065] The rotary cylinder 3 continuously supplies oil, and the chuck 74 continues to move outward. The second wedge block 762 inside the first mounting cavity 761 contacts the wedge rod 794. The inclined surfaces squeeze each other and push the wedge rod 794 to slide. The wedge rod 794 drives the end brake pad 796 to adhere to and press against the side wall of the guide wheel 792. The rotation of the guide wheel 792 is completely locked. The original rolling contact is transformed into static friction contact. The three-point clamping position is evenly and tightly stressed, eliminating clamping gaps and greatly improving the ability to resist vibration and axial and circumferential movement, ensuring the stability of the pipe clamping posture.

[0066] The chuck 74 is displaced relative to the guide wheel 792, causing the push frame 781 to move synchronously. The push frame 781 squeezes the elastic airbag 783 inside the limit frame 782. After being compressed, the gas inside the elastic airbag 783 flows through the air outlet pipe 784, the one-way valve 785, and the branch pipe 788 into the air storage cylinder 789. The air pressure pushes the piston to extend the locking rod 787 and lock it into the locking groove 721 on the surface of the slide block 72. The position of the chuck 74 is mechanically locked. Even if the rotary cylinder 3 experiences oil leakage and pressure loss, the chuck 74 will not retract or loosen, effectively avoiding the risk of the workpiece falling. The one-way gas storage is achieved by relying on the one-way valve 785. The air pressure of the elastic airbag 783 outputs a stable pushing force, and the locking rod 787 is not easy to fail in the locked state.

[0067] During the movement of the push frame 781, the inclined blocks 7811 on both sides move synchronously. The inclined surface presses against the first wedge block 754 of the lateral anti-slip component 75. After being subjected to force, the slide rod 752 slides outward along the slide sleeve 751, compressing the first spring 755 and driving the elastic top 753 to press against the inner wall of the pipe. The three sets of guide wheels 792, together with multiple sets of elastic tops 753, form a multi-point circumferential limiting structure, which bidirectionally constrains the axial movement and circumferential rotation of the pipe, eliminating the problem of workpiece displacement during sawing.

[0068] Start the first drive unit 2. The first motor 21 drives the first lead screw 22 to rotate through the first synchronous belt 25, which drives the first lead screw sleeve 23 and the slide table 24 to move and adjust the longitudinal processing position of the pipe. Start the second drive unit 9. The second motor 91 drives the second lead screw 92 to rotate. The second lead screw sleeve 93 drives the moving seat 94 and the top sawing assembly 8 to move laterally and align with the sawing position. After the adjustment is completed, start the third motor to drive the saw blade to rotate at high speed and carry out stable sawing operation on the pipe.

[0069] After processing, the small cylinder 772 is operated to extend and retract, which drives the connecting plate 773 and the slide plate 774 to move. The anti-reverse inclined block 775 disengages from the contact surface of the second wedge block 762, the tension spring 763 rebounds and pulls the second wedge block 762 to reset, the wedge rod 794 loses the squeezing force, the second spring 795 pushes the brake pad 796 to retract, and the guide wheel 792 restores its ability to rotate freely.

[0070] At this point, simply remove the cut pipe, replace it with the next pipe to be cut, restart the small cylinder 772, and drive the anti-reverse wedge block 775 to reset, so that the brake pad 796 can re-adhere to the guide wheel 792. There is no need to perform the anti-slip centering operation again, which greatly saves processing time.

[0071] When processing a pipe of a different specification, the electric exhaust valve 7810 is opened to release the internal air pressure of the air reservoir 789. The third spring 786 pushes the locking rod 787 back into the cavity, the locking rod 787 disengages from the locking groove 721, the mechanical locking state of the chuck 74 is released, the elastic airbag 783 re-intakes air through the air intake hole on the surface and resets, the rotary cylinder 3 drives the frustum 6 to reset and retract, and the chuck 74 retracts inward under the action of the reset spring, separating from the inner wall of the pipe fitting. The worker can then directly remove the processed pipe fitting, and then put in a pipe of a different specification, and repeat the sawing work according to the above steps.

[0072] 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 positioning device for preventing pipe movement in a multi-blade sawing machine, characterized in that: include, The sawing machine body (1) has a first driving component (2) and a chuck assembly (7) on its surface, including: a hydraulic chuck (71) on the surface of the sawing machine body (1), a slide (72) on one side of the hydraulic chuck (71), a locking groove (721) on the surface of the slide (72), a chuck (74) slidably connected to the inner cavity of the slide (72), a roller (73) fixed to one side of the chuck (74), and a support base (76) fixed to the chuck (74). The surface of the support base (76) includes a lateral anti-slip member (75) on both sides, a backstop member (77) on the surface of the claw (74), a locking member (78) on the surface of the claw (74), and a rolling member (79) on the surface of the support base (76). The claw (74) is opened under hydraulic pressure, and the rolling member (79) first contacts the pipe to prevent slip movement. The locking member (78) is used to lock the claw (74), and the backstop member (77) is used to unlock the rolling member (79) by braking it.

2. The anti-slip positioning device for pipe fittings on a multi-blade sawing machine as described in claim 1, characterized in that: The first driving component (2) includes: a first motor (21) fixed to one side of the sawing machine body (1), a first lead screw (22) rotatably connected to the surface of the sawing machine body (1), a first lead screw sleeve (23) sleeved on the surface of the first lead screw (22), a slide (24) fixed to the top of the first lead screw sleeve (23), and a first synchronous belt (25) provided between the output end of the first motor (21) and the first lead screw sleeve (23).

3. The anti-shifting positioning device for pipe fittings on a multi-blade sawing machine as described in claim 1 or 2, characterized in that: A housing (4) is fixed to the surface of the main body (1) of the sawing machine tool. A rotary cylinder (3) is fixed to one side of the housing (4). A push-pull rod (5) is fixed to the output end of the rotary cylinder (3). A frustum (6) is fixed to one end of the push-pull rod (5).

4. The anti-shifting positioning device for pipe fittings on a multi-blade sawing machine as described in claim 1, characterized in that: The support base (76) has a first mounting cavity (761) on both sides. The support base (76) has a second mounting cavity (764) on both sides and on the side of the first mounting cavity (761). The inner cavity of the first mounting cavity (761) is slidably connected to a second wedge block (762). A tension spring (763) is fixed on the surface of the second wedge block (762). One end of the tension spring (763) is fixed to the inner wall of the first mounting cavity (761).

5. The anti-shifting positioning device for pipe fittings on a multi-blade sawing machine as described in claim 1, characterized in that: The lateral anti-slip component (75) includes: a sliding sleeve (751) fixed to both sides of the support base (76), and a sliding rod (752) slidably connected to the inner cavity of the sliding sleeve (751). One end of the sliding rod is fixed with an elastic top (753), and the other end is fixed with a first wedge block (754). The outer ring of the sliding rod (752) is fitted with a first spring (755). One end of the first spring (755) is fixed to the surface of the first wedge block (754), and the other end is fixed to the surface of the sliding sleeve (751).

6. The anti-slip positioning device for pipe fittings on a multi-blade sawing machine as described in claim 1, characterized in that: The anti-reverse component (77) includes: a fixed base (771) fixed to the surface of the claw (74), a small cylinder (772) fixed to the surface of the fixed base (771), a connecting plate (773) fixed to the output end of the small cylinder (772), a sliding plate (774) fixed to both ends of the connecting plate (773), and an anti-reverse ramp (775) fixed to the surface of the sliding plate (774).

7. The anti-slip positioning device for pipe fittings on a multi-blade sawing machine as described in claim 1, characterized in that: The locking component (78) includes: a push frame (781) slidably connected to the inner cavity of the support base (76), a limiting frame (782) fixed to the inner cavity of the claw (74), an elastic airbag (783) fixed to the inside of the limiting frame (782), an air outlet pipe (784) connected to both sides of the elastic airbag (783), a one-way valve (785) installed on the surface of the air outlet pipe (784), a branch pipe (788) connected to the outlet end of the one-way valve (785), and an air storage cylinder (789) fixed to the outer wall of the claw (74), which is connected to one end of the branch pipe (788) through a pipe.

8. The anti-slip positioning device for pipe fittings on a multi-blade sawing machine as described in claim 7, characterized in that: The locking component (78) further includes: a locking rod (787) slidably connected to the inner cavity of the air reservoir (789); a third spring (786) sleeved on the surface of the locking rod (787), one end of which extends through to the outside of the air reservoir (789), and the other end is fixed with a piston, with the piston and the inner wall of the air reservoir (789) being slidably sealed; an electric exhaust valve (7810) fixed to the outlet end of the branch pipe (788); and a triggering block (7811) fixed to both sides of the pusher frame (781).

9. The anti-move positioning device for pipe fittings on a multi-blade sawing machine as described in claim 4, characterized in that: The rolling element (79) includes: a sliding block (791) slidably connected to the inner cavity of the first mounting cavity (761), a guide wheel (792) fixedly and rotatably connected to the surface of the sliding block (791), a limiting sleeve (793) fixed to the surface of the sliding block (791), a wedge rod (794) slidably connected to the inner cavity of the limiting sleeve (793), a second spring (795) fixed to the surface of the limiting sleeve (793), one end of which is fixed to the surface of the wedge rod (794), a brake pad (796) fixed to one end of the wedge rod (794), a spring piece (798) one end of which is fixed to the surface of the sliding block (791), and the other end of which is fixed to the inner cavity of the first mounting cavity (761), and a limiting block (797) fixed to both sides of the sliding block (791).

10. The anti-slip positioning device for pipe fittings on a multi-blade sawing machine as described in claim 9, characterized in that: The outer ring of the guide wheel (792) is fixedly fitted with an anti-slip rubber ring, and the inner wall of the first mounting cavity (761) is provided with a sliding groove that cooperates with the sliding block (791).

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