A pipe end forming process and apparatus therefor

Abstract

The application discloses a kind of pipe end forming automatic processing equipment, it includes front positioning mechanism, servo die mechanism, composite clamping mechanism and rear limiting mechanism, the composite clamping mechanism includes main clamping mechanism and auxiliary clamping mechanism, pipe material is clamped by main clamping mechanism, auxiliary clamping mechanism clamps rear limiting insertion rod, so as to realize the effective clamping of pipe material, effectively solve the phenomenon that short pipe is axially slipped in main clamping mechanism, causes product scrap, the rear limiting mechanism is rotated by servo motor and drives feed screw to rotate, so as to drive feed slide to move on feed screw to the direction of servo die mechanism, until the end is inserted into the tail end of pipe material, and is resisted by the tail end of pipe material, constant force driving is realized by servo motor, guarantees the accuracy of feed position, realizes parameterization by detecting the monitoring of feed position, improves product quality.

Description

Technical Field

[0001] This invention relates to the field of pipe end forming technology, specifically to a pipe end forming process and equipment. Background Technology

[0002] Pipe end forming machine is a type of equipment for forming the end face of pipe workpieces. It uses different molds to process pipes into various shapes such as pipe end reduction, expansion, bulging, upsetting, and so on. It is suitable for forming various shapes of pipe fittings, automotive oil pipes, air pipes, water pipes, and air conditioning pipe connections.

[0003] Pipes are divided into short pipes (50-120mm in length) and long pipes (greater than 120mm). However, pipe end forming machines have the following drawbacks when processing short pipes:

[0004] First: When processing the pipe ends of short pipes, the main clamping mechanism clamps a relatively short straight section, causing the pipe to slip axially within the main clamping mechanism, resulting in product scrap.

[0005] Second: In traditional short pipe processing, the rear limiting mechanism used is a hydraulic cylinder. The hydraulic cylinder provides a holding force at the rear end for processing. Because there are length tolerances when cutting pipes of the same size, and when the pipe is shorter than the standard size, after the front end is accurately positioned, there is a certain gap between the rear end of the pipe and the rear limiting mechanism due to the tolerance. The rear end does not contact the rear limiting mechanism. During the forming process of the front end of the pipe, due to the large stamping force, the pipe is pushed backward until it abuts against the rear positioning mechanism, which ultimately causes the front end of the pipe to shift and the forming size of the pipe end to be unstable.

[0006] Third: The pipe sizes vary and the shapes are frequently changed. The limiting length of the rear limiting mechanism is also frequently adjusted. The mold life is not only limited, but there are also too many human interference factors, resulting in a high rate of product defect.

[0007] Therefore, there is an urgent need for a pipe end forming process and its equipment. Summary of the Invention

[0008] In order to solve the above-mentioned technical problems, the present invention provides a pipe end forming process.

[0009] A pipe end forming process, the specific steps of which are as follows:

[0010] S1: The robotic arm grips the pipe and places it in the main clamping mechanism, and positions the front end of the pipe through the front positioning mechanism;

[0011] S2: The main clamping mechanism starts, clamps the pipe, and the robotic arm retracts;

[0012] S3: The rear limit mechanism moves forward with a constant thrust to hold the rear end of the pipe;

[0013] S4: The secondary clamping mechanism clamps and limits the rear limit mechanism;

[0014] S5: The servo punching mechanism starts to perform multiple forward punching formations, and the tube end forming is completed;

[0015] S6: The secondary clamping mechanism is released, the clamping force on the rear limit mechanism is removed, and the rear limit mechanism retracts;

[0016] S7: The robotic arm grips the material, the main clamping mechanism releases, and the robotic arm removes the pipe, completing one cycle.

[0017] An automatic processing equipment for pipe end forming includes a frame, on which a front positioning mechanism, a servo punching mechanism, a compound clamping mechanism and a rear limiting mechanism are provided.

[0018] The servo die mechanism includes a die assembly and a die drive mechanism that drives the die assembly to move horizontally in the direction of the rear limiting mechanism.

[0019] The composite clamping mechanism is located between the servo punching mechanism and the rear limiting mechanism, and includes a composite base on which a main clamping mechanism and a secondary clamping mechanism are provided.

[0020] The rear limiting mechanism is used to tighten the tail end of the tube, and it includes a rear limiting part and a rear limiting drive mechanism that drives the rear limiting part to move horizontally in the direction of the servo punching mechanism.

[0021] Preferably, the rear limiting part includes a rear limiting rod seat and a rear limiting rod fixed on the rear limiting rod seat.

[0022] Preferably, the rear limit drive mechanism includes a servo motor, the output end of which is connected to a feed screw via belt drive, a feed slide is threaded onto the feed screw, the two sides of the feed slide are slidably connected to a guide rail, and a rear limit insert seat is detachably fixed on the feed slide.

[0023] Preferably, the rear limiting insert is cylindrical with a diameter larger than the inner diameter of the tube, and a cylindrical insertion end is formed on the end of the rear limiting insert near the servo die mechanism, the diameter of the insertion end being smaller than the inner diameter of the tube.

[0024] Preferably, pressure strips are formed on both sides of the rear limiting insert seat, and quick-release pressure blocks are rotatably connected to the feed slide at positions corresponding to the pressure strips on both sides, and the quick-release pressure blocks are semi-circular.

[0025] Preferably, the die assembly includes a die slide, a die-changing motor is fixed on the die slide, a gear is fixed at the output end of the die-changing motor, the gear meshes with a rack, a die-changing seat is fixed on the rack, the die-changing seat is slidably connected to a die-changing guide rail, and multiple punches are fixed on the die-changing seat.

[0026] Preferably, the die driving mechanism includes a die servo motor, the output end of which is connected to a drive screw via belt drive, the drive screw is rotatably connected to the frame via bearings, and a die slide is threaded onto the drive screw, the die slide being slidably connected to the frame.

[0027] Preferably, the main clamping mechanism is located on the side close to the servo punching mechanism, and includes a first main clamping die and a second main clamping die that cooperate with each other. The first main clamping die is fixed on the composite base, and the second main clamping die is fixed on the output end of the main clamping gas-liquid booster cylinder and slidably connected to the composite base.

[0028] Preferably, the auxiliary clamping mechanism is arranged side by side with the main clamping mechanism on the composite base. It includes a first auxiliary clamping mold and a second auxiliary clamping mold that cooperate with each other. The first auxiliary clamping mold is fixed on the composite base, and the second auxiliary clamping mold is fixed on the output end of the auxiliary clamping gas-liquid booster cylinder and slidably connected to the composite base.

[0029] The beneficial effects of this invention are:

[0030] (1) This invention discloses an automatic processing equipment for pipe end forming, which includes a frame. The frame is equipped with a front positioning mechanism, a servo punching mechanism, a compound clamping mechanism and a rear limiting mechanism. The front positioning mechanism accurately positions the front end of the pipe, the rear limiting mechanism accurately positions the rear end of the pipe, and the compound clamping mechanism clamps the pipe, thereby achieving precise control of the position of the pipe to be processed. Finally, the servo punching mechanism performs pipe end forming processing. The equipment has a compact structure, occupies little space, has a wide range of applications, and is precise and efficient. The entire structure adopts pneumatic and servo control, which facilitates production visualization management and strong product traceability.

[0031] (2) This invention discloses an automatic processing equipment for pipe end forming, which includes a servo punching mechanism. By rotating the mold changing motor and through the cooperation of gears and racks, the mold changing seat is finally driven to slide on the mold changing guide rail to realize the switching of different punches. For the pipe end forming processing of complex-shaped workpieces, traditional processing equipment cannot complete the process with one mold and requires multiple changes of different molds to complete the processing. However, this invention can realize the switching of different punches through the drive of the mold changing motor, which is efficient, completes the process in one step, and is fast and accurate.

[0032] (3) This invention discloses an automatic processing equipment for pipe end forming, which includes a rear limiting mechanism. When performing rear limiting, the servo motor rotates to drive the feed screw to rotate, thereby driving the feed slide to move on the feed screw towards the servo punch mechanism until the insertion end is inserted into the tail end of the pipe. The end of the limiting rod abuts against the tail end of the pipe. At this time, when the output of the servo torque of the servo motor reaches the preset value, the servo motor stops working, and the rear positioning of the pipe is completed. The pipe end processing is achieved by using the constant force drive of the servo motor, which ensures the accuracy of the feed position. At the same time, by monitoring the feed position, the data of product processing is parameterized, improving product quality. It is applicable to pipes of various sizes, is easy to adjust, efficient, energy-saving, environmentally friendly, and precisely controlled.

[0033] (4) The present invention discloses an automatic processing equipment for pipe end forming, which includes a rear limiting mechanism. The rear limiting insert seat is detachably fixed on the feed slide. Pressure strips are formed on both sides of the rear limiting insert seat. Quick release pressure blocks are rotatably connected on both sides of the feed slide at positions corresponding to the pressure strips. The quick release pressure blocks are semi-circular. The installation or removal of the rear limiting insert seat is realized by rotating the quick release pressure blocks, which is simple and convenient.

[0034] (5) This invention discloses an automatic processing equipment for pipe end forming, which includes a composite clamping mechanism. The main clamping pneumatic-hydraulic booster cylinder or the auxiliary clamping pneumatic-hydraulic booster cylinder provides precise and reliable power to realize the clamping work of the main clamping mechanism or the auxiliary clamping mechanism. For short pipes, the main clamping mechanism and the auxiliary clamping mechanism work together to achieve clamping. The clamping force is strong, which ensures the stability of the processed product. That is, the main clamping mechanism clamps the pipe and the auxiliary clamping mechanism clamps the back limit rod, thereby realizing the effective clamping of the pipe and effectively solving the problem of short pipes slipping axially in the main clamping mechanism, which causes the product to be scrapped. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the overall structure of an automatic pipe end forming processing equipment according to the present invention;

[0037] Figure 2 This is a side view of an automatic pipe end forming processing equipment according to the present invention;

[0038] Figure 3 This is a three-dimensional structural diagram of the rear limiting mechanism of the present invention;

[0039] Figure 4 This is a cross-sectional view of the rear limiting mechanism of the present invention;

[0040] Figure 5 This is a top view of the feed slide of the present invention;

[0041] Figure 6 This is a three-dimensional structural diagram of the composite clamping mechanism of the present invention;

[0042] Figure 7 This is a schematic diagram of the pipe end forming process of the present invention. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] A pipe end forming process, the specific steps of which are as follows:

[0045] S1: The robotic arm clamps the tube 9 and places it in the main clamping mechanism 23. The front positioning mechanism performs precise front positioning on the placed tube 9 to ensure the uniformity of the front end position of each tube 9 placed. The front positioning mechanism includes a positioning screw on the mold changing base. When front positioning is required, the positioning screw extends forward and abuts against the front end of the tube 9 to complete the front positioning. After the main clamping mechanism 23 clamps the tube in step S2, it retracts and resets.

[0046] S2: The main clamping mechanism 23 starts, clamps the pipe, and the robotic arm retracts;

[0047] S3: The rear limiting mechanism 3 advances with a constant thrust to hold the rear end of the pipe. The driving force of the rear limiting mechanism 3 is the servo motor 31. Through the precise control of the servo torque of the servo motor 31, the tail end of the pipe 9 is limited.

[0048] S4: The secondary clamping mechanism 24 clamps and fixes the rear limit rod 36 of the rear limit mechanism 3;

[0049] S5: Servo punching mechanism 1 starts to perform multiple forward punching and forming, and the tube end forming is completed;

[0050] S6: The secondary clamping mechanism is released, the clamping force on the rear limit mechanism 3 is removed, and the rear limit mechanism 3 retracts;

[0051] S7: The robotic arm grips the material, the main clamping mechanism releases, and the robotic arm removes the pipe, completing one cycle. The above process ensures the stability of the quality of the pipe end forming products.

[0052] An automatic processing equipment for pipe end forming includes a frame, on which a front positioning mechanism, a servo punching mechanism 1, a compound clamping mechanism 2 and a rear limiting mechanism 3 are provided. The front positioning mechanism includes a positioning screw on a mold changing base. When front positioning is required, the positioning screw extends forward and abuts against the front end of the pipe 9 to complete the front positioning. After the main clamping mechanism 23 clamps it, it retracts and resets.

[0053] The servo die mechanism 1 includes a die assembly and a die drive mechanism that drives the die assembly to move horizontally in the direction of the rear limit mechanism 3. The die assembly is a multi-punch switchable mode, which greatly improves production efficiency and can also process complex workpieces in one step, with high speed and high precision.

[0054] The composite clamping mechanism 2 includes a composite base, on which a main clamping mechanism and a secondary clamping mechanism are provided.

[0055] The rear limiting mechanism 3 is used to tighten the tail end of the pipe. It includes a rear limiting part and a rear limiting drive mechanism that drives the rear limiting part to move horizontally in the direction of the servo punching mechanism 1. The rear limiting mechanism 3 achieves precise rear positioning, which is used to solve the technical problem of unstable processing dimensions of short pipes due to length tolerance.

[0056] Specifically, the rear limiting part includes a rear limiting insert seat 35 and a rear limiting insert 36 fixed on the rear limiting insert seat 35. The rear limiting insert 36 is cylindrical, and its diameter is larger than the inner diameter of the tube. A cylindrical insertion end 39 is formed on the end of the rear limiting insert 36 near the servo punching mechanism 1. The diameter of the insertion end 39 is smaller than the inner diameter of the tube. The rear limiting drive mechanism includes a servo motor 31. The output end of the servo motor 31 is connected to a feed screw 32 via a belt drive. A feed slide 33 is threaded onto the feed screw 32. The two sides of the feed slide 33 are slidably connected to the guide slide rail 34. A rear limit rod seat 35 is detachably fixed on the feed slide 33. During rear positioning, the servo motor 31 rotates to drive the feed screw 32 to rotate, thereby driving the feed slide 33 to move towards the servo punching mechanism 1 on the feed screw 32 until the insertion end 39 is inserted into the tail end of the tube 9. The end of the limit rod 36 abuts against the tail end of the tube 9. At this time, when the output of the servo torque of the servo motor 31 reaches the preset value, the servo motor 31 stops working, and the rear positioning of the tube 9 is completed. It is applicable to tubes 9 of various sizes, is easy to adjust, highly efficient, energy-saving, environmentally friendly and precisely controlled, ensuring accurate rear positioning of the tail end of each inserted tube 9.

[0057] Specifically, pressure strips 37 are formed on both sides of the rear limiting insert 35. Quick-release pressure blocks 38 are rotatably connected to the feed slide 33 at positions corresponding to the pressure strips 37 on both sides. The quick-release pressure blocks 38 are semi-circular. When the quick-release pressure blocks 38 are rotated so that their arc-shaped edges press against the pressure strips 37, the rear limiting insert 35 is installed. When rotated in the opposite direction until its diameter edge faces the rear limiting insert 35, the rear limiting insert 35 is disassembled.

[0058] Specifically, the die assembly includes a die slide 17, on which a die-changing motor 13 is fixed. A gear is fixed at the output end of the die-changing motor 13, and the gear meshes with a rack. A die-changing seat is fixed on the rack, and the die-changing seat is slidably connected to a die-changing guide rail 12. Multiple punches 11 are fixed on the die-changing seat. By rotating the die-changing motor 13 and engaging the gear and rack, the die-changing seat is driven to slide on the die-changing guide rail 12, thus enabling the switching of different punches 11. For the forming of tube ends of complex-shaped workpieces, traditional processing equipment cannot complete the process with a single die and requires multiple changes of different dies. However, this invention enables the switching of different punches through the drive of the die-changing motor 13, which is efficient, completes the process in one step, and is fast and precise.

[0059] Specifically, the die driving mechanism includes a die servo motor 14. The output end of the die servo motor 14 is connected to a drive screw 15 via a belt drive. The drive screw 15 is rotatably connected to the frame via a bearing 16. A die slide 17 is threaded onto the drive screw 15. The die slide 17 is slidably connected to the frame. By rotating the die servo motor 14, the drive screw 15 is driven to rotate via a synchronous belt drive, ultimately causing the die slide 17 to slide linearly on the frame.

[0060] Specifically, the main clamping mechanism is located on one side 31 near the servo punching mechanism 1. It includes a first main clamping die and a second main clamping die that cooperate with each other. The first main clamping die is fixed on the composite base, and the second main clamping die is fixed on the output end of the main clamping pneumatic-hydraulic booster cylinder 21 and slidably connected to the composite base. The auxiliary clamping mechanism is arranged side by side with the main clamping mechanism on the composite base. It includes a first auxiliary clamping die and a second auxiliary clamping die that cooperate with each other. The first auxiliary clamping die is fixed on the composite base, and the second auxiliary clamping die is fixed on the output end of the auxiliary clamping pneumatic-hydraulic booster cylinder 22 and slidably connected to the composite base. It provides precise and reliable power through the main clamping pneumatic-hydraulic booster cylinder 21 or the auxiliary clamping pneumatic-hydraulic booster cylinder 22 to realize the clamping work of the main clamping mechanism or the auxiliary clamping mechanism.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A pipe end forming and processing equipment, characterized in that: It includes a frame, on which a front positioning mechanism, a servo punching mechanism (1), a compound clamping mechanism (2) and a rear limiting mechanism (3) are provided. The servo die mechanism (1) includes a die assembly and a die drive mechanism that drives the die assembly to move horizontally in the direction of the rear limiting mechanism (3). The composite clamping mechanism (2) is located between the servo punching mechanism (1) and the rear limiting mechanism (3), and includes a composite base on which a main clamping mechanism and a secondary clamping mechanism are provided. The rear limiting mechanism (3) is used to tighten the tail end of the tube. It includes a rear limiting part and a rear limiting drive mechanism that drives the rear limiting part to move horizontally in the direction of the servo punching mechanism (1). The rear limiting part includes a rear limiting rod seat (35) and a rear limiting rod (36) fixed on the rear limiting rod seat (35). The rear limit drive mechanism includes a servo motor (31), the output end of which is connected to a feed screw (32) via belt drive, a feed slide (33) is threaded onto the feed screw (32), the two sides of the feed slide (33) are slidably connected to the guide slide rail (34), and a rear limit insert seat (35) is detachably fixed on the feed slide (33). The rear limiting insert (36) is cylindrical and its diameter is larger than the inner diameter of the tube. A cylindrical insertion end (39) is formed on the end of the rear limiting insert (36) near the servo punching mechanism (1). The diameter of the insertion end (39) is smaller than the inner diameter of the tube. The rear limiting insert (35) has pressure strips (37) formed on both sides. The feed slide (33) has quick-release pressure blocks (38) rotatably connected at positions corresponding to the pressure strips (37) on both sides. The quick-release pressure blocks (38) are semi-circular. The auxiliary clamping mechanism is arranged side by side with the main clamping mechanism on the composite base. It includes a first auxiliary clamping mold and a second auxiliary clamping mold that cooperate with each other. The first auxiliary clamping mold is fixed on the composite base, and the second auxiliary clamping mold is fixed on the output end of the auxiliary clamping gas-liquid booster cylinder (22) and is slidably connected to the composite base. The specific steps are as follows: S1: The robot arm clamps the pipe (9) and places it in the main clamping mechanism (23), and positions the front end of the pipe (9) through the front positioning mechanism; S2: The main clamping mechanism (23) starts, clamps the pipe, and the robot arm retracts; S3: The rear limit mechanism (3) advances with constant thrust to hold the rear end of the pipe; S4: The secondary clamping mechanism (24) clamps and fixes the rear limit rod (36) of the rear limit mechanism (3); S5: The servo punching mechanism (1) starts to perform multiple forward punching and forming, and the tube end forming is completed; S6: The secondary clamping mechanism is released, the clamping force on the rear limiting mechanism (3) is removed, and the rear limiting mechanism (3) moves backward; S7: The robotic arm grips the material, the main clamping mechanism releases, and the robotic arm removes the pipe, completing one cycle.

2. The pipe end forming and processing equipment according to claim 1, characterized in that: The die assembly includes a die slide (17), a die changing motor (13) is fixed on the die slide (17), a gear is fixed at the output end of the die changing motor (13), the gear meshes with a rack, a die changing seat is fixed on the rack, the die changing seat is slidably connected to the die changing guide rail (12), and a plurality of punches (11) are fixed on the die changing seat.

3. The pipe end forming and processing equipment according to claim 2, characterized in that: The die driving mechanism includes a die servo motor (14), the output end of which is connected to a drive screw (15) via belt drive. The drive screw (15) is rotatably connected to the frame via a bearing (16). A die slide (17) is threaded onto the drive screw (15), and the die slide (17) is slidably connected to the frame.

4. The pipe end forming and processing equipment according to claim 1, characterized in that: The main clamping mechanism is located on the side close to the servo punching mechanism (1). It includes a first main clamping die and a second main clamping die that cooperate with each other. The first main clamping die is fixed on the composite base, and the second main clamping die is fixed on the output end of the main clamping gas-liquid booster cylinder (21) and is slidably connected to the composite base.

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