Pipe online tracking and positioning method and device in pipe cutting machining

Abstract

The invention discloses a pipe on-line tracking and positioning device in pipe cutting machining, which comprises a corrugated pipe welding device, a corrugated pipe cutting device and a control system, and a pipe on-line tracking and positioning method in pipe cutting machining comprises the following steps: acquiring the traveling speed of the welding action of the corrugated pipe welding device; a signal of the positioner is obtained, and the cutting length value of the extension of the corrugated pipe is calculated in real time; and the cutting length value is compared with a preset required length value, and when the cutting length value is equal to the required length value, a laser cutter is started for cutting. Through linkage of the corrugated pipe welding device and the corrugated pipe cutting device, the advancing speed of the corrugated pipe is used as the strategy reference of the cutting action, the moving speed of the corrugated pipe is accurately collected through the control system, the laser cutter is controlled to conduct cutting after calculation, the continuity and the accurate control degree are higher, and the cutting efficiency is improved. And the processing efficiency and quality are higher.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe processing, and in particular to a method and a device for online tracking and positioning of pipes in pipe cutting processing. Background Art

[0002] Bellows are tubular elastic sensitive components made of foldable corrugated sheets connected along the folding and expansion directions. Bellows mainly include metal bellows, bellows expansion joints, bellows heat exchange tubes, diaphragm boxes, and metal hoses.

[0003] During the production process, corrugated pipes require welding. The raw material, corrugated pipe, is a continuous tube that is then processed into fixed-length sections. Precision control of the length of these sections is crucial to the quality of the finished pipe. Furthermore, continuous and precise control of the entire process, from welding the raw material to cutting, is a key element in improving the efficiency and quality of pipe production lines. The entire process of corrugated pipe production on the production line is referred to as "pipe production."

[0004] Therefore, in order to improve the efficiency and quality of bellows during mechanical processing, it is necessary to develop corresponding specific processing methods and devices. Summary of the Invention

[0005] In view of the above situation, the plan is as follows: An online tracking and positioning device for pipes in pipe cutting processing, comprising: A bellows welding device, into which the bellows pipe material is input, welded on the bellows welding device, and then output; A corrugated pipe cutting device, comprising a frame and a laser cutting assembly, wherein the laser cutting assembly is connected to the frame via a first linear sliding mechanism to achieve linear movement; The laser cutting assembly includes a cutting support frame connected to the first linear sliding mechanism, a laser cutter is provided on the cutting support frame, and the laser cutter is connected to a first servo motor to drive the laser cutter to completely cut the corrugated pipe by rotating; A control system includes a main control module, a speed sensor for monitoring the moving speed of the corrugated pipe at the corrugated pipe welding device, and a positioner for positioning the corrugated pipe. The speed sensor, the first servo motor and the positioner are electrically connected to the main control module, and the main control module obtains the moving speed data of the corrugated pipe through the speed sensor, obtains the positioning data of the corrugated pipe through the positioner, and sends a cutting control instruction to the first servo motor to cut the corrugated pipe.

[0006] In some preferred embodiments, the corrugated pipe cutting device includes a positioning bracket connected to the first linear sliding mechanism, the positioning bracket is provided with a through hole for the corrugated pipe to pass through, and the positioning bracket is provided with a positioning sleeve for stabilizing the corrugated pipe.

[0007] In some preferred embodiments, the first linear sliding mechanism includes a second servo motor, the output end of the second servo motor is connected to a screw mechanism, and a sliding plate is provided on the screw mechanism, the cutting support frame is connected to the sliding plate, and the second servo motor is electrically connected to the main control module so that the main control module issues instructions and drives the sliding plate to move. In some preferred embodiments, a transfer clamping arm assembly is also included, which includes a cantilever, and the cantilever is connected to the sliding plate, and the cantilever is provided with a clamping claw for clamping the corrugated tube and a clamping driver for driving the clamping claw, and the clamping driver is electrically connected to the main control module.

[0008] In some preferred embodiments, the clamping driver is a pneumatic cylinder.

[0009] In some preferred embodiments, the laser cutter is a bidirectional rotary cutting cutter.

[0010] A method for online tracking and positioning of pipes in a pipe cutting process comprises the following steps: Obtaining the traveling speed of the welding action of the bellows welding device; Obtain the signal from the locator and calculate the extended cutting length of the bellows in real time; The cutting length value is compared with a preset required length value, and when the cutting length value is equal to the required length value, the laser cutter is started and cutting is performed.

[0011] In some preferred embodiments, the step of obtaining the traveling speed of the welding action of the corrugated pipe welding device includes: Placing a speed sensor for real-time speed monitoring at the bellows welding device; The speed sensor transmits the real-time travel speed of the bellows to the main control module through an attached communication network.

[0012] In some preferred embodiments, the step of acquiring the signal of the positioner and calculating the cut length of the bellows in real time includes: The end of the bellows triggers the locator, and the locator transmits the triggering signal to the main control module; The main control module calculates the real-time distance between the end of the corrugated pipe and the locator according to the travel speed and travel time of the corrugated pipe, and calculates the cutting length based on the distance.

[0013] The beneficial effects of the present invention include: 1. By setting up the linkage between the bellows welding device and the bellows cutting device, and taking the travel speed of the bellows as the strategic benchmark for the cutting action, the control system accurately collects the movement speed of the bellows, and controls the laser cutter to cut after calculation, achieving the effect of fixed-length cutting and synchronous cutting and welding, the degree of coordination, operation automation, continuity and precise control are higher, and the processing efficiency and quality are higher; 2. Using laser cutter as the cutting method for corrugated tube is beneficial to the cutting effect, fast cutting speed and convenient for programmed control; 3. A transfer clamp arm assembly is used to transfer the cut bellows, providing more space for subsequent cutting operations and avoiding interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the layout structure of a bellows welding device and a bellows cutting device in one embodiment of the present invention.

[0015] Figure 2 It is a schematic diagram of the arrangement structure of the laser cutting assembly and the transfer clamping arm assembly in one embodiment of the present invention.

[0016] Figure 3 It is a schematic diagram of the arrangement structure of the second servo motor in one embodiment of the present invention.

[0017] Figure 4 It is a structural block diagram of the control system in the present invention.

[0018] Figure 5 This is the main method block diagram of the pipe online tracking and positioning method in the present invention.

[0019] Figure 6 It is a block diagram of the sub-steps of the method for online tracking and positioning of pipes in the present invention.

[0020] Figure 7 This is a block diagram of the control sub-steps of the servo motor in the pipe online tracking and positioning method of the present invention.

[0021] Figure 8 This is another sub-step block diagram of the pipe online tracking and positioning method in the present invention.

[0022] Figure 9 This is another sub-step block diagram of the pipe online tracking and positioning method in the present invention. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and examples: refer to Figure 1-4As shown, an online tracking and positioning device for pipes used in pipe cutting processes is used to coordinate the welding and cutting of corrugated pipes in a corrugated pipe processing line. This is achieved by adjusting the speed and travel distance of the corrugated pipes. Specifically, the device includes a corrugated pipe cutting device 100, a control system 200, and a corrugated pipe welding device 400. The corrugated pipe welding device 400 is used to weld corrugated pipes. During welding, the corrugated pipe material is fed into the corrugated pipe welding device 400 at a predetermined speed, welded there, and then output as a welded finished product.

[0024] refer to Figure 1-3 As shown, a corrugated pipe cutting device 100 is used to cut corrugated pipe to a desired length. The corrugated pipe cutting device 100 includes a frame 110 and a laser cutting assembly 120. The laser cutting assembly 120 is connected to the frame 110 via a first linear sliding mechanism 130 to achieve linear movement. The laser cutting assembly 120 includes a cutting support frame 121 connected to the first linear sliding mechanism 130. A laser cutter 122 is mounted on the cutting support frame 121. The laser cutter 122 is connected to a first servo motor 123 to drive the laser cutter 122 to completely cut the corrugated pipe through rotation.

[0025] The frame 110 serves as a structural support. To adjust the cutting position and the length of the cut bellows, the cutting support 121 is mounted on the first linear slide mechanism 130, and its position is changed by the linear movement of the first linear slide mechanism 130. The laser cutter 122 generates laser light and uses it to cut the bellows. Since the laser cutter 122 needs to rotate during cutting, a first servo motor is provided to drive the laser cutter 122 to completely cut the bellows.

[0026] refer to Figure 4 As shown, the control system 200 is an integrated system for controlling operations such as bellows welding and cutting. Specifically, the control system 200 includes a main control module 210, a speed sensor 220 for monitoring the speed of the bellows at the bellows welding device, and a positioner 230 for positioning the bellows. The speed sensor 220, the first servo motor 123, and the positioner 230 are electrically connected to the main control module 210. The main control module 210 obtains the speed data of the bellows through the speed sensor 220 and the positioning data of the bellows through the positioner 230, and issues a cutting control command to the first servo motor 123 to cut the bellows.

[0027] In some preferred embodiments, reference Figure 2As shown, the corrugated tube cutting device 100 includes a positioning bracket 140 connected to a first linear sliding mechanism 130. The positioning bracket 140 is provided with a through hole for the corrugated tube to pass through, and a positioning sleeve 150 is provided on the positioning bracket 140 to stabilize the corrugated tube. The function of the positioning bracket 140 is to ensure that the corrugated tube remains stable when inserted into the cutting section, avoiding misalignment caused by the downward drag. The positioning bracket 140 provides a through hole as a support structure for the corrugated tube, and the positioning sleeve 150 is added to further enhance the positioning of the corrugated tube.

[0028] In some preferred embodiments, reference Figure 3 The first linear sliding mechanism 130 includes a second servo motor 131. The output end of the second servo motor 131 is connected to a screw mechanism 132, and a sliding plate 133 is provided on the screw mechanism 132. The cutting support frame 121 is connected to the sliding plate 133. The second servo motor 131 is electrically connected to the main control module 210, so that the main control module 210 issues instructions and drives the sliding plate 133 to move. The first linear sliding mechanism 130 is used to provide linear displacement, and specifically drives the screw mechanism 132 through the second servo motor 131, thereby driving the sliding plate 133 to generate back and forth displacement. The cutting support frame 121 is connected to the sliding plate 133 to move along with the sliding plate 133. The second servo motor 131 is electrically connected to the main control module 210, and the main control module 210 sends control instructions to the second servo motor 131 to drive its precession.

[0029] In some preferred embodiments, reference Figure 2 As shown, the output end of the second servo motor 131 is connected to a reducer 135 through a coupling 134, and the reducer is connected to the screw mechanism 132 to reduce the output speed of the second servo motor 131 and then convert it into the precession speed of the screw mechanism 132 to meet the processing requirements.

[0030] In some preferred embodiments, reference Figure 2 As shown, the transfer clamping arm assembly 300 is also included. The transfer clamping arm assembly 300 includes a cantilever 310, and the cantilever 310 is connected to the sliding plate 133. The cantilever 310 is provided with a clamping claw 330 for clamping the corrugated tube and a clamping driver 340 for driving the clamping claw 330. The clamping driver 340 is electrically connected to the main control module 210. The cantilever 310 is used to support the clamping claw 330 and is connected to the sliding plate 133 so as to move synchronously therewith. The clamping claw 330 is driven by the clamping driver 340 to achieve the clamping action.

[0031] In some preferred embodiments, the clamping actuator 340 is a pneumatic cylinder.

[0032] In some preferred embodiments, the laser cutter 122 is a bidirectional rotary cutting cutter.

[0033] In some preferred embodiments, reference Figure 4 As shown, the main control module 210 is provided with a method execution module 240 , and the method execution module 240 is written with a method for online tracking and positioning of pipes in pipe cutting processing.

[0034] refer to Figure 4-9 As shown, a method for online tracking and positioning of pipes in a pipe cutting process is executed by the method execution module 240 and specifically includes the following steps: Obtaining the traveling speed of the bellows welding device during the welding action; in this step, the traveling speed during the bellows welding action is obtained as a reference for subsequent calculations to ensure coordination between the welding action and the cutting action; Obtain the signal from the locator and calculate the cut length of the bellows in real time. In this step, the trigger signal from the locator is used as the calculation basis to calculate the real-time length of the bellows during its movement. Since the position of the locator and the position of the laser cutter are different, the corresponding data needs to be processed to ensure that the length of the bellows produced by the final cut meets the requirements. Compare the cutting length value with the preset required length value. When the cutting length value is equal to the required length value, start the laser cutter and cut. In this step, the required bellows length value is preset in the main control module, which is the required length value, and the required length value and the real-time changing cutting length value are compared and calculated. When the cutting length value meets the required length value, the pneumatic laser cutter starts cutting, and the bellows length obtained by cutting meets the requirements.

[0035] In some preferred embodiments, comparing the cutting length value with a preset required length value, and when the cutting length value is equal to the required length value, starting the laser cutter and performing cutting includes: Drive the first linear sliding mechanism to move, and keep the moving speed of the first linear sliding mechanism the same as the travel speed of the bellows; in this step, control the moving speed of the first linear sliding mechanism to be the same as the travel speed of the bellows to ensure that their movements are synchronized, and a smooth incision is produced during the cutting operation.

[0036] Start the laser cutter to cut the corrugated tube; in this step, start the laser cutter to cut the corrugated tube, and the resulting cut surface is smooth.

[0037] In some preferred embodiments, starting the laser cutter to cut the corrugated tube includes: Drive the first servo motor to rotate 180° to the left; The first servo motor is driven to rotate 180° to the right. The above two steps complete the cutting of the corrugated tube by controlling the first servo motor to move back and forth left and right to avoid additional damage caused by unidirectional cutting.

[0038] In some preferred embodiments, the step of obtaining the traveling speed of the welding action of the corrugated pipe welding device includes: Place a speed sensor for real-time speed monitoring at the bellows welding device; in this step, the speed sensor is placed to ensure accurate acquisition of the bellows' travel speed; The speed sensor transmits the real-time travel speed of the bellows to the main control module through the attached communication network; in this step, the speed data obtained by the speed sensor is transmitted to the main control module through the communication link.

[0039] In some preferred embodiments, the step of acquiring the signal of the positioner and calculating the cut length value of the extended bellows in real time includes: The end of the bellows triggers the positioner, which transmits the trigger signal to the main control module. In this step, the positioner trigger serves as the signal basis for the main control module's calculation to achieve accurate calculation and control. The main control module calculates the real-time distance between the end of the corrugated tube and the locator according to the traveling speed and traveling time of the corrugated tube, and calculates the cutting length according to the distance; in this step, the cutting length is specifically calculated.

[0040] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art through logical analysis, reasoning, or limited experimentation based on the concepts of the present invention and the prior art should be within the scope of protection defined by the claims.

Claims

1. An online tracking and positioning device for pipes in pipe cutting processing, characterized in that: include: A bellows welding device, into which the bellows pipe material is input, welded on the bellows welding device, and then output; A corrugated pipe cutting device (100), comprising a frame (110) and a laser cutting assembly (120), wherein the laser cutting assembly (120) is connected to the frame (110) via a first linear sliding mechanism (130) to achieve linear movement; The laser cutting assembly (120) comprises a cutting support frame (121) connected to the first linear sliding mechanism (130), a laser cutter (122) is provided on the cutting support frame (121), and the laser cutter (122) is connected to a first servo motor (123) to drive the laser cutter (122) to completely cut the corrugated pipe by rotating. A control system (200) is provided, wherein the control system (200) comprises a main control module (210), a speed sensor (220) for monitoring the moving speed of the corrugated pipe at the corrugated pipe welding device, and a positioner (230) for positioning the corrugated pipe, wherein the speed sensor (220), the first servo motor (123), and the positioner (230) are electrically connected to the main control module (210), and the main control module (210) obtains the moving speed data of the corrugated pipe through the speed sensor (220), obtains the positioning data of the corrugated pipe through the positioner (230), and issues a cutting control instruction to the first servo motor (123) to cut the corrugated pipe.

2. The online tracking and positioning device for pipes in pipe cutting processing according to claim 1, characterized in that: The corrugated pipe cutting device (100) comprises a positioning bracket (140) connected to the first linear sliding mechanism (130), the positioning bracket (140) being provided with a through hole for the corrugated pipe to pass through, and the positioning bracket (140) being provided with a positioning sleeve (150) for stabilizing the corrugated pipe.

3. The online tracking and positioning device for pipes in pipe cutting processing according to claim 1, characterized in that: The first linear sliding mechanism (130) includes a second servo motor (131), an output end of the second servo motor (131) is connected to a lead screw mechanism (132), and a sliding plate (133) is provided on the lead screw mechanism (132), the cutting support frame (121) is connected to the sliding plate (133), and the second servo motor (131) is electrically connected to the main control module (210), so that the main control module (210) issues an instruction and drives the sliding plate (133) to move.

4. The online tracking and positioning device for pipes in pipe cutting processing according to claim 3, characterized in that: The transfer clamping arm assembly (300) is also included. The transfer clamping arm assembly (300) includes a cantilever (310), and the cantilever (310) is connected to the sliding plate (133). The cantilever (310) is provided with a clamping claw (330) for clamping the bellows and a clamping driver (340) for driving the clamping claw (330). The clamping driver (340) is electrically connected to the main control module (210).

5. The online tracking and positioning device for pipes in pipe cutting processing according to claim 4, characterized in that: The clamping driver (340) is a cylinder.

6. The online tracking and positioning device for pipes in pipe cutting processing according to claim 1, characterized in that: The laser cutter (122) is a bidirectional rotary cutting type cutter.

7. A method for online tracking and positioning of pipes in pipe cutting processing, characterized in that: The following steps are involved: Obtaining the traveling speed of the welding action of the bellows welding device; Obtain the signal from the locator and calculate the extended cutting length of the bellows in real time; The cutting length value is compared with a preset required length value, and when the cutting length value is equal to the required length value, the laser cutter is started and cutting is performed.

8. The method for online tracking and positioning of pipes in pipe cutting processing according to claim 7, characterized in that: The steps of obtaining the traveling speed of the welding action of the bellows welding device include: Placing a speed sensor for real-time speed monitoring at the bellows welding device; The speed sensor transmits the real-time travel speed of the bellows to the main control module through an attached communication network.

9. The method for online tracking and positioning of pipes in pipe cutting processing according to claim 7, characterized in that: The steps of obtaining the signal of the positioner and calculating the extended cutting length of the bellows in real time include: The end of the bellows triggers the locator, and the locator transmits the triggering signal to the main control module; The main control module calculates the real-time distance between the end of the corrugated pipe and the locator according to the travel speed and travel time of the corrugated pipe, and calculates the cutting length based on the distance.

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