Automatic cutting process for steel structural pipe fittings

Abstract

The present application relates to the technical field of metal cutting, more particularly, it relates to a kind of steel structure pipe fittings automatic cutting process, in the process of steel pipe axial feeding and locking, first, the movable push block is pushed along the axial feed by the axial movable movable push block, the mode of movable push block pushing steel pipe is incremental pushing, the axial thrust of movable push block gradually increases from initial value, until pushing steel pipe along the axial feed, then movable push block continues to push steel pipe along the axial, until the free end of steel pipe is tightly pressed in the fixed stopper of cutting station end, movable push block continues to increase the thrust, and the pressure plate arranged on movable push block is used to detect the pressing force in real time, when the pressure reaches the preset threshold, it is determined that the steel pipe is positioned in place along the axial, finally, steel pipe locking mechanism is controlled to clamp and fix steel pipe, and movable push block is controlled to move reversely, and is separated from the contact with the end face of steel pipe, thereby effectively eliminating the error accumulation of axial feeding, and ensuring that the cutting length of batch steel pipe is uniform.

Description

Technical Field

[0001] This invention relates to the field of metal cutting technology, and in particular to an automatic cutting process for steel structure pipe fittings. Background Technology

[0002] In existing automated cutting operations for steel pipes, the industry generally adopts a servo-driven track combined with encoder closed-loop control to achieve axial feeding and fixed-length cutting of steel pipes. The encoder collects the travel displacement signal in real time to accurately control the steel pipe conveying stroke. Once the feeding length reaches the preset cutting size, the feeding stops immediately, thus completing the fixed-length feeding and segmented cutting operation.

[0003] However, this conventional feeding method for fixed length has obvious drawbacks: during the actual cutting process, pipe fittings will inevitably incur actual cutting losses such as cutting allowance, sawing material consumption, and end face grinding. If the subsequent axial feeding of pipe fittings still strictly follows the initial preset fixed stroke without compensating for the actual losses caused by cutting, it will directly lead to problems such as the finished pipe fittings being too short in length and not meeting the size standards.

[0004] As single pipe fittings are fed in a cycle and cut repeatedly, the dimensional deviations formed by each cut cannot be offset, and the loss error will continue to accumulate and superimpose, eventually greatly amplifying the overall axial cutting dimensional deviation of the pipe fittings, severely reducing the dimensional consistency and processing accuracy of the finished pipe fittings, and making it difficult to meet the processing requirements of mass standardized production of high-precision steel structure pipe fittings. Summary of the Invention

[0005] To address the shortcomings of existing automated cutting operations for steel structure pipe fittings, this application provides an automated cutting process for steel structure pipe fittings.

[0006] The automatic cutting process for steel structure pipe fittings provided by this invention adopts the following technical solution: An automatic cutting process for steel structure pipe fittings includes the following steps: S1: feeding the steel pipe to the cutting station; S2: axial feeding and locking of the steel pipe; S3: pre-processing of the steel pipe cutting position; S4: circumferential cutting of the steel pipe; S5: cutting completion and mechanism reset; S6: unloading the cut finished steel pipe, repeating steps S2-S5 until the cyclic cutting of a single steel pipe is completed; S2 includes: S21: The steel pipe is pushed along the axial direction by an axially movable pusher block. The way the movable pusher block pushes the steel pipe is an incremental push. The axial thrust of the movable pusher block gradually increases from the initial value until it pushes the steel pipe along the axial direction. S22: The movable push block continues to push the steel pipe axially until the free end of the steel pipe is pressed against the fixed stop at the end of the cutting station. The movable push block continues to increase the pushing force. The pressing pressure is detected in real time by the pressure plate set on the movable push block. When the pressure reaches the preset threshold, it is determined that the steel pipe is axially positioned. S23: Control the locking mechanism to clamp and fix the steel pipe; control the movable push block to move in the opposite direction and disengage from the end face of the steel pipe; In S4, a circumferential cutting device is used to perform circumferential cutting operations. The circumferential cutting device is located between the movable push block and the fixed stop block. The preset axial distance between the circumferential cutting device and the fixed stop block determines the length of the finished steel pipe cut in a single operation.

[0007] Preferably, in S23, the locking mechanism is provided in two sets along the axial direction, namely a first locking mechanism close to the fixed stop and a second locking mechanism close to the movable push block. The movable push block and the second locking mechanism move synchronously along the axial direction. The first locking mechanism locks after the steel pipe is axially fed into place, and the second locking mechanism locks after moving in the opposite direction with the movable push block.

[0008] Preferably, in S22, the preset threshold is a dynamically adjusted pressure threshold, which decreases synchronously as the remaining length of a single steel pipe to be cut decreases.

[0009] Preferably, in S22, based on the pushing force F when the movable pusher pushes the steel pipe, the pressure threshold is set to be a fixed compensation value f superimposed on the pushing force. When the pressure plate detects that the tightening pressure reaches F+f, it is determined that the steel pipe is axially fed into place.

[0010] Preferably, in S22, the pressure plate has a built-in flexible sensor array. The flexible sensor array is used to capture pressure distribution data in the contact area with the end face of the steel pipe in real time, and generate a pressure heat map based on the pressure distribution data. The circumferential cutting device identifies the position and shape characteristics of the end face of the steel pipe based on the pressure heat map and plans the cutting scheme.

[0011] Preferably, the circumferential cutting device determines the circumferential cutting position based on the position distribution of the pressure heat zone diagram on the pressure plate and the radial offset between the pressure plate and the circumferential cutting device, and adjusts the cutting time and cutting feed action for the wall thickness of the steel pipe.

[0012] Preferably, a cooling plate is provided on the end face of the fixed block facing the steel pipe. When a single circumferential cut is completed and axial feeding is performed again, the cut is pushed along with the steel pipe to fit against the surface of the cooling plate, and the cutting cut is cooled by the cooling plate.

[0013] Preferably, the cooling plate on the fixed block is a partitioned controllable targeted cooling structure. The cooling plate is divided into several independent cooling temperature control areas. The cooling plate retrieves the pressure heat map generated by the pressure plate, establishes a coordinate mapping relationship between the area coordinates of the pressure heat map and each cooling temperature control area of ​​the cooling plate, selectively opens the corresponding cooling area based on the mapping structure, and adjusts the cooling flow rate, cooling power and cooling time of each cooling area according to the end face wall thickness and temperature rise difference.

[0014] Preferably, the fixed stop is assembled using a detachable installation structure. By adjusting the installation position of the fixed stop, the axial distance between the fixed stop and the circumferential cutting device is changed, thereby setting the single steel pipe cutting length.

[0015] Preferably, the method also includes a self-learning compensation step for cutting errors. After each cutting and unloading of the finished steel pipe, the actual cutting length of the finished steel pipe is collected by the vision detection module. The actual cutting length is compared with the preset cutting length to calculate the single cutting error. The cutting error and corresponding working condition data for each cutting are recorded to establish an error compensation model. When performing axial feeding and cutting operations in the future, the clamping pressure threshold of the movable push block and / or the installation position of the fixed stop block are dynamically adjusted based on the error compensation model.

[0016] The beneficial effects of this invention are as follows: 1. This invention uses the fixed axial distance between the fixed stop block and the circumferential cutting device as the fixed length, and relies on the tightening limit of the movable push block to achieve precise axial feeding. It is not affected by the loss of a single cut, so that the length of the finished product of each cut is directly determined by the mechanical reference, effectively eliminating the accumulation of errors and ensuring that the cutting length of batch steel pipes is uniform. 2. This invention uses an adaptive adjustment method of incremental propulsion + dynamic adjustment of pressure threshold. The pressure threshold can actively adapt to different pushing conditions of long and short pipes. It can quickly identify the axial clamping position and reduce the risk of steel pipe deformation due to prolonged clamping. 3. The pressure plate on the movable push block integrates a flexible sensor array, which can collect the pressure distribution on the end face of the steel pipe in real time and generate a pressure heat map. This enables the circumferential cutting device to effectively identify the position of the steel pipe, the end face contour, and the differences in wall thickness at various locations. Combined with simple preset data, it can plan the circumferential cutting trajectory and dynamically adjust the cutting time and cutting depth in different wall thickness areas. Attached Figure Description

[0017] Figure 1 This is a process flow diagram of the automatic cutting process for steel structure pipe fittings in the embodiments of this application; Figure 2 This is a detailed flowchart of S2 in the embodiments of this application; Figure 3This is a simplified top view of the steel pipe after it has been axially pushed into place and locked in an embodiment of this application.

[0018] Explanation of reference numerals in the attached drawings: 1. Steel pipe; 2. Cutting station; 3. Circumferential cutting device; 4. Movable push block; 41. Pressure plate; 5. Fixed stop block; 51. Cooling plate; 61. First locking mechanism; 62. Second locking mechanism. Detailed Implementation

[0019] The following will combine Figures 1-3 The present invention will be further illustrated by the embodiments.

[0020] This embodiment discloses an automatic cutting process for steel structure pipe fittings.

[0021] The automatic cutting process for steel structure pipe fittings includes the following steps: S1: Steel pipe 1 is fed to cutting station 2. Steel pipe 1 is transported to the cutting station by the cantilever mechanism and the posture of steel pipe 1 is adjusted so that the central axis of steel pipe 1 is coaxial with the rotation center of the circumferential cutting device 3, thus completing the initial positioning.

[0022] S2: Axial feeding and locking of steel pipe 1, including: S21: The steel pipe 1 is pushed along the axial direction by the axially movable push block 4. The way the movable push block 4 pushes the steel pipe 1 is by incremental pushing. The axial thrust of the movable push block 4 gradually increases from the initial value until it pushes the steel pipe 1 along the axial direction. S22: The movable push block 4 continues to push the steel pipe 1 along the axial direction until the free end of the steel pipe 1 is pressed against the fixed stop block 5 at the end of the cutting station 2. The movable push block 4 continues to increase the pushing force. The pressing pressure is detected in real time by the pressure plate 41 set on the movable push block 4. When the pressure reaches the preset threshold, it is determined that the steel pipe 1 is axially positioned in place. S23: Control the locking mechanism of steel pipe 1 to clamp and fix steel pipe 1; control the movable push block 4 to move in the opposite direction a small distance to ensure that it is no longer in contact with the end face of steel pipe 1.

[0023] S3: Pre-treatment of the cutting position of steel pipe 1, preheating gas nozzle is in place, first aligning with the starting point of the circumference of steel pipe 1, then uniformly heating the circumference cutting part of steel pipe 1. Cutting is carried out after pre-treatment heating to alleviate problems such as incomplete cutting of steel pipe 1, cracking of the cut and accumulation of molten slag.

[0024] S4: Circumferential cutting of steel pipe 1 is performed using a circumferential cutting device 3. The circumferential cutting device 3 is located between the movable push block 4 and the fixed stop block 5. The preset axial distance between the circumferential cutting device 3 and the fixed stop block 5 determines the length of the finished steel pipe 1 cut in a single operation. The fixed stop block 5 is assembled using a detachable installation structure. By adjusting the installation position of the fixed stop block 5, the axial distance between the fixed stop block 5 and the circumferential cutting device 3 is changed, thereby setting the length of the steel pipe 1 cut in a single operation. During cutting, the cutting head of the circumferential cutting device 3 first descends to the working height, and then the cutting head rotates 360° around the stationary steel pipe 1 to cut until the entire cross-section is cut off. The cutting head can be a cutting torch or a mechanical circular saw. In this embodiment, the cutting head of the circumferential cutting device 3 is preferably a high-temperature cutting torch. The circumferential cutting device 3 includes a base, a rotary drive mechanism, a torch feed adjustment component, a flame cutting gas supply unit, and a servo speed control module.

[0025] S5: Cutting end and mechanism reset. After the circumferential cutting trajectory is closed, the cutting head stops cutting and automatically lifts away from the work station. At the same time, the locking mechanism releases the steel pipe 1.

[0026] S6: Cut the finished steel pipe 1 and unload it. The cut finished steel pipe 1 is unloaded by the cantilever mechanism to the finished product area. Then repeat steps S2-S5 until the cyclic cutting of a single steel pipe 1 is completed.

[0027] In summary, existing technologies rely on servo-driven tracks and encoder closed-loop control to feed materials according to preset parameters. This cannot offset cutting losses such as saw cuts and kerfs. After multiple consecutive cuts, dimensional deviations will continue to accumulate. However, the automatic cutting process for steel pipe fittings based on the present invention uses the fixed axial distance between the fixed stop 5 and the circumferential cutting device 3 as the fixed length, and relies on the tightening limit of the movable push block 4 to achieve precise axial feeding. It is not affected by single-cut losses, so that the length of each cut product is directly determined by the mechanical reference, effectively preventing error accumulation and ensuring that the cutting length of batch steel pipes 1 is uniform.

[0028] In this invention, the movable pusher 4 is provided with linearly adjustable axial thrust by a servo drive component. The pressure plate 41 collects the pushing contact pressure in real time and transmits it back to the main control system. The system automatically determines the movement state of the pipe fitting based on the feedback pressure. During the free feed stage, the drive mechanism is controlled to stop the thrust increment and operate with stable pressure. When encountering an obstacle and stopping, the drive mechanism is controlled again to gradually increase the thrust. Once the pressure reaches the target, the force increase output stops immediately. Specifically, the incremental pushing process of the movable pusher 4 on the steel pipe 1 is divided into three stages, including the normal free pushing stage: the thrust output by the pusher gradually increases upward, and the steel pipe 1 is moved forward smoothly by relying on the increasing thrust. Once the thrust reaches a value sufficient for smooth feeding, the increase in thrust is temporarily stopped, and the material is fed at a constant speed with the current constant thrust. During the obstruction and stagnation stage, the end face of the steel pipe 1 cannot move forward after being pressed against the fixed stop block 5. The pushing stroke is limited and stagnation occurs, and the feeding resistance gradually increases. At this time, the original thrust is insufficient to continue the movement, and the movable push block 4 restarts the thrust increment mode, increasing the axial thrust again step by step. During the arrival determination and termination stage, during the continuous force increase process, the pressure plate 41 collects the contact pressure in real time. When the pressure reaches the dynamic pressure threshold corresponding to the current working condition, it is determined that the material is in place, the thrust increment action is immediately terminated, and then the subsequent locking process begins.

[0029] In S23, the locking mechanism achieves locking or unlocking through the movement between two relatively set arc-shaped clamping blocks. It adopts a pair of arc-shaped clamping blocks to hug and lock, which fits the outer circle contour of the steel pipe 1, resulting in a large contact area and uniform clamping force. Two sets of locking mechanisms are arranged axially: a first locking mechanism 61 near the fixed stop 5 and a second locking mechanism 62 near the movable push block 4. The first locking mechanism 61 locks after the steel pipe 1 is axially fed into place. The movable push block 4 and the second locking mechanism 62 move synchronously axially through a linkage mechanism. The second locking mechanism 62 locks after moving in the opposite direction with the movable push block 4. On the one hand, locking the first locking mechanism 61 first completes the initial fixation, and then retracting the movable push block 4 can release the continuous axial pressing force of the movable push block 4 on the steel pipe 1 during the cutting process, avoiding axial movement and end face extrusion deformation of the steel pipe 1 under cutting vibration and cutting stress. At the same time, it eliminates the adverse effects of continuous pressing stress on the cut formation quality. On the other hand, the linkage mechanism enables the second locking mechanism 62 to move axially synchronously with the movable push block 4. During the feeding process, the second locking mechanism 62 can move synchronously with the push block, so that the two sets of locking mechanisms always clamp the two ends of the steel pipe 1 axially, maintaining the double-end positioning and clamping state of the steel pipe 1, and achieving stable cutting.

[0030] In S22, the preset threshold is a dynamically adjusted pressure threshold, which decreases synchronously as the remaining length of the single steel pipe 1 to be cut decreases. The purpose is that: the initial weight of the steel pipe 1 is relatively large, and the pushing force of the movable push block 4 to push the steel pipe 1 for axial feeding is relatively large, so the pressure threshold should also be larger when it is in place. As the weight of the steel pipe 1 gradually decreases due to being cut, the pushing force of the movable push block 4 to push the steel pipe 1 for axial feeding will also decrease. If the pressure threshold remains unchanged, after the movable push block 4 pushes the steel pipe 1 into place, it will continue to press the steel pipe 1 with a gradually increasing pushing force. This not only makes it impossible to judge the axial feeding of the steel pipe 1 in time, but also poses a risk of deformation of the steel pipe 1. However, through the incremental propulsion + dynamic adjustment of the pressure threshold adaptive adjustment method of the present invention, the pressure threshold can actively adapt to different pushing conditions of long and short pipes. In the end, it can quickly identify the axial pressing state and reduce the risk of deformation of the steel pipe 1 due to prolonged pressing. Specifically, in S22 of this embodiment, based on the pushing force F when the movable pusher 4 pushes the steel pipe 1, the pressure threshold is set to be a fixed compensation value f superimposed on the pushing force. When the pressure plate 41 detects that the tightening pressure reaches F+f, it is determined that the steel pipe 1 is axially fed into place.

[0031] In S22 of other embodiments, the dynamically adjusted pressure threshold can also be set in the following way: a curve or data table showing the correspondence between the remaining length to be cut of the steel pipe 1 and the clamping pressure threshold is established in advance. Before each feeding, the active push block 4 retrieves the corresponding target pressure threshold according to the current remaining length to be cut. When the clamping pressure detected by the pressure plate 41 reaches the target pressure threshold, it is determined that the steel pipe 1 is axially positioned.

[0032] Furthermore, in S22, the pressure plate 41 is primarily a rigid bearing substrate with a built-in flexible sensor array on its surface. It also integrates a signal acquisition module and a data transmission interface. The flexible sensor array is used to capture pressure distribution data in real time in the area contacting the end face of the steel pipe 1, and generates a pressure heat map based on the pressure distribution data. The circumferential cutting device 3 identifies the position and shape characteristics of the end face of the steel pipe 1 based on the pressure heat map and plans the cutting scheme. For example, the circumferential cutting device 3 can determine the circumferential cutting position based on the position distribution of the pressure heat map on the pressure plate 41 and the preset radial offset between the pressure plate 41 and the circumferential cutting device 3. Additionally, based on the shape of the pressure heat map, it determines the thickness differences at various points along the axial direction of the steel pipe 1. If differences exist, it increases the pretreatment time and / or cutting time and deepens the cutting feed action at the thicker parts of the steel pipe 1 to ensure successful cutting and shaping. In summary, the pressure plate 41 on the movable pusher block 4 integrates a flexible sensor array, which can collect the pressure distribution on the end face of the steel pipe 1 in real time and generate a pressure heat map. This allows the circumferential cutting device 3 to effectively identify the position, end face contour, and wall thickness differences of the steel pipe 1. Combined with simple preset data (such as inner and outer diameters), it can plan the circumferential cutting trajectory and dynamically adjust the cutting time and depth for different wall thickness areas. For thick-walled areas, the cutting stroke is deepened and lengthened, while the cutting amount is appropriately reduced in thin-walled areas. This effectively solves processing defects such as uneven cuts, incomplete cuts, and pipe wall damage caused by uneven pipe wall thickness, significantly improving the quality of the cut. In addition, the steel pipe 1 may rotate during axial pushing. At this time, the flexible sensor array on the pressure plate 41 can also monitor the rotation of the steel pipe 1 during the process, ensuring accurate matching of the subsequent circumferential cutting path.

[0033] As the cut-shaped steel pipe 1 is fed into the cutting system and the steel pipe 1 is continuously pushed axially, the cut end of the steel pipe 1 will be in close contact with the fixed stop 5. This will result in insufficient self-cooling effect of the cut end of the steel pipe 1, and the cutting thermal stress cannot be reduced in time. To avoid this situation, a cooling plate 51 is provided on the end face of the fixed stop 5 facing the steel pipe 1. When the single circumferential cutting is completed and axial feeding is performed again, the cut end of the formed steel pipe 1 is pushed and attached to the surface of the cooling plate 51 along with the steel pipe 1. The cooling plate 51 provides directional auxiliary cooling for the cut end. Finally, with the help of the cooling plate 51 integrated in the fixed stop 5, the formed cutting end face pushed and attached can be directly and quickly assisted in cooling, accelerating the heat dissipation of the high temperature area of ​​the cut end, reducing the cutting thermal stress, and suppressing the thermal deformation of the pipe end face.

[0034] Furthermore, the cooling plate 51 on the fixed block 5 is a zoned controllable targeted cooling structure. The interior of the cooling plate 51 is divided into several independent cooling temperature control areas, such as multiple sets of independent sealed cooling channels. Each cooling channel is independently equipped with a flow control component and an on / off control element. The cooling plate 51 retrieves the pressure heat map generated by the pressure plate 41, establishes a coordinate mapping relationship between the area coordinates of the pressure heat map and each cooling temperature control area of ​​the cooling plate 51, selectively opens the corresponding cooling area based on the mapping structure, and adjusts the cooling flow rate, cooling power and cooling time of each cooling area according to the end face wall thickness and temperature rise difference, so as to avoid full-load cooling of the entire area, reduce the consumption of cooling medium and reduce equipment energy consumption.

[0035] In some embodiments, a self-learning compensation step for cutting errors is also included. After each unloading of the finished steel pipe 1, the actual cutting length of the finished steel pipe 1 is collected by the vision inspection module, and the actual cutting length is compared with the preset cutting length to calculate the single cutting error. The system records the cutting error and corresponding working condition data for each cutting operation, establishes an error compensation model, and then dynamically adjusts the clamping pressure threshold of the movable push block 4 and / or the installation position of the fixed stop block 5 based on the error compensation model during subsequent axial feeding and cutting operations to correct the cutting error.

[0036] The implementation principle of the automatic cutting process for steel pipe fittings in this embodiment is as follows: the distance between the fixed stop 5 and the circumferential cutting device 3 is used as the physical length reference. The moving push block 4 pushes the steel pipe 1 to the limit position by increasing the thrust. The pressure threshold is dynamically adjusted according to the remaining pipe length to complete the positioning judgment. The pressure plate 41 generates a pressure heat map based on the flexible sensor array, identifies the end face wall thickness difference and adaptively adjusts the cutting parameters. In addition, the partitioned targeted cooling structure at the fixed stop 5 accurately dissipates heat from the cut. The feeding, positioning, cutting, cooling and unloading are completed in a cycle to achieve high-precision intelligent pipe fitting length cutting.

[0037] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic cutting process for steel structure pipe fittings, characterized in that, Includes the following steps: S1: Steel pipe is fed to the cutting station; S2: Axial feeding and locking of steel pipe; S3: Pre-processing of steel pipe cutting position; S4: Circumferential cutting of steel pipe; S5: Cutting end and mechanism reset; S6: Unloading of finished steel pipe, repeat steps S2-S5 until the cyclic cutting of a single steel pipe is completed. S2 includes: S21: The steel pipe is pushed along the axial direction by an axially movable pusher block. The way the movable pusher block pushes the steel pipe is an incremental push. The axial thrust of the movable pusher block gradually increases from the initial value until it pushes the steel pipe along the axial direction. S22: The movable push block continues to push the steel pipe axially until the free end of the steel pipe is pressed against the fixed stop at the end of the cutting station. The movable push block continues to increase the pushing force. The pressing pressure is detected in real time by the pressure plate set on the movable push block. When the pressure reaches the preset threshold, it is determined that the steel pipe is axially positioned. S23: Control the locking mechanism to clamp and fix the steel pipe; control the movable push block to move in the opposite direction and disengage from the end face of the steel pipe; In S4, a circumferential cutting device is used to perform circumferential cutting operations. The circumferential cutting device is located between the movable push block and the fixed stop block. The preset axial distance between the circumferential cutting device and the fixed stop block determines the length of the finished steel pipe cut in a single operation.

2. The automatic cutting process for steel structure pipe fittings according to claim 1, characterized in that: In S23, the locking mechanism is provided in two sets along the axial direction, namely a first locking mechanism close to the fixed stop and a second locking mechanism close to the movable push block. The movable push block and the second locking mechanism move synchronously along the axial direction. The first locking mechanism locks after the steel pipe is axially fed into place, and the second locking mechanism locks after moving in the opposite direction with the movable push block.

3. The automatic cutting process for steel structure pipe fittings according to claim 1, characterized in that: In S22, the preset threshold is a dynamically adjusted pressure threshold, which decreases synchronously as the remaining length of a single steel pipe to be cut decreases.

4. The automatic cutting process for steel structure pipe fittings according to claim 3, characterized in that: In S22, based on the pushing force F when the movable pusher pushes the steel pipe, the pressure threshold is set to be a fixed compensation value f superimposed on the pushing force. When the pressure plate detects that the tightening pressure reaches F+f, it is determined that the steel pipe is axially fed into place.

5. The automatic cutting process for steel structure pipe fittings according to claim 1, characterized in that: In S22, the pressure plate has a built-in flexible sensor array, which is used to capture pressure distribution data in the contact area with the end face of the steel pipe in real time, and generate a pressure heat map based on the pressure distribution data. The circumferential cutting device identifies the position and shape characteristics of the end face of the steel pipe based on the pressure heat map and plans the cutting scheme.

6. The automatic cutting process for steel structure pipe fittings according to claim 5, characterized in that: The circumferential cutting device determines the circumferential cutting position based on the position distribution of the pressure heat zone diagram on the pressure plate and the radial offset between the pressure plate and the circumferential cutting device, and adjusts the cutting time and cutting feed action for the wall thickness of the steel pipe.

7. The automatic cutting process for steel structure pipe fittings according to claim 5, characterized in that: A cooling plate is provided on the end face of the fixed block facing the steel pipe. When a single circumferential cut is completed and axial feeding is performed again, the cut is pushed along with the steel pipe to fit against the surface of the cooling plate, and the cutting cut is cooled by the cooling plate.

8. The automatic cutting process for steel structure pipe fittings according to claim 7, characterized in that: The cooling plate on the fixed block is a zoned controllable targeted cooling structure. The cooling plate is divided into several independent cooling temperature control zones. The cooling plate retrieves the pressure heat map generated by the pressure plate, establishes a coordinate mapping relationship between the regional coordinates of the pressure heat map and each cooling temperature control zone of the cooling plate, selectively opens the corresponding cooling zone based on the mapping structure, and adjusts the cooling flow rate, cooling power and cooling time of each cooling zone according to the end face wall thickness and temperature rise difference.

9. The automatic cutting process for steel structure pipe fittings according to claim 1, characterized in that: The fixed stop is assembled using a detachable installation structure. By adjusting the installation position of the fixed stop, the axial distance between the fixed stop and the circumferential cutting device is changed, thereby setting the single steel pipe cutting length.

10. The automatic cutting process for steel structure pipe fittings according to claim 1, characterized in that: It also includes a self-learning compensation step for cutting errors. After each cutting and unloading of the finished steel pipe, the actual cutting length of the finished steel pipe is collected by the vision detection module. The actual cutting length is compared with the preset cutting length to calculate the single cutting error. The cutting error and corresponding working condition data for each cutting are recorded to establish an error compensation model. When performing axial feeding and cutting operations in the future, the clamping pressure threshold of the movable push block and / or the installation position of the fixed stop block are dynamically adjusted based on the error compensation model.

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