Pipe sawing system and pipe cutting method

Abstract

The present application relates to cutting equipment technical field, disclose a kind of pipe sawing machine system and pipe cutting method, comprising: construction platform, conveying shaft is rotatably assembled on construction platform;Limiting component, limiting component includes arc plate, telescopic link, travelling device and shell, one end of telescopic link is connected with the side of arc plate away from contact surface, the other end is connected with travelling device, travelling device is assembled in arc-shaped track in shell;Clamping device, clamping device includes several groups of limiting component, the shell of each group of limiting component is connected with each other, the arc plate of each group of limiting component is enclosed into the perforation for pipe passing;Cutting saw blade and laser recognition device, the laser line of laser recognition device is arranged in the same plane with the end surface of cutting saw blade away from clamping device.It realizes automatic adjustment pipe position, measurement and cutting length feeding;The size of clamping fixing force is adjusted by the telescopic length of telescopic link, prevent the deterioration of the ovality of pipe, pipe will not be offset, guarantee cut quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cutting equipment, in particular to a pipe sawing machine system and a pipe cutting method. BACKGROUND

[0002] In shipbuilding and other heavy industries, a large number of pipes of various materials and specifications need to be cut and processed. The cutting quality directly affects the quality of the subsequent processing, especially the assembly and welding. For example, the length, ovality, and cut flatness of the pipe cutting will directly affect the quality, precision, and efficiency of the pipe assembly and welding. The pipe sawing machine plays an irreplaceable role in the pipe cutting process.

[0003] The existing method is to manually draw a line on the pipe, adjust the position of the pipe on the sawing machine platform, move the pipe to the cutting position, clamp the pipe with a clamp, and then automatically cut the pipe.

[0004] However, manual operation has the following problems. First, the cutting length is measured manually, and the line is drawn manually. The positioning of the cutting position is observed by the naked eye, which has a large error. Different operators will result in different errors, and this error problem is difficult to completely solve, resulting in a large length error of the pipe cutting. Second, the pipe is clamped with a clamp during cutting, and the clamp only contacts the outer surface of the pipe in a line, which has a small contact area and is not symmetrical around the circumference. The clamping force is determined by the operator's observation and experience, which may be too large and cause the pipe to be clamped flat. Third, the effective connection thickness of the pipe decreases during the cutting process, which may cause the end of the pipe to move relative to the cutting position, affecting the cutting quality or causing the cutting saw to break, which is a safety hazard. SUMMARY

[0005] The present application provides a pipe sawing machine system to solve the problems of large cutting error, pipe clamping flatness, and poor cutting quality in the prior art. The present application also provides a pipe cutting method using the pipe sawing machine system.

[0006] To achieve the above-mentioned purpose, the present application provides a pipe sawing machine system, comprising:

[0007] A construction platform, a plurality of conveying shafts are arranged on the construction platform in parallel, the conveying shafts are used for conveying pipe axial movement;

[0008] A limiting assembly, the limiting assembly comprises an arc-shaped plate, a plurality of telescopic rods, a plurality of traveling devices and a housing, the arc-shaped plate has a contact surface for contacting with the pipe, the telescopic rods and the traveling devices are arranged in at least two groups along the circumferential direction of the arc-shaped plate, one end of each telescopic rod is connected to the side of the arc-shaped plate away from the contact surface, and the other end of each telescopic rod is connected to the traveling device, the housing is assembled on the construction platform, the housing has an arc-shaped track extending along the circumferential direction of the pipe, and the traveling device is assembled on the arc-shaped track.

[0009] A clamping device, the clamping device comprises a plurality of limiting assemblies, the housings of the limiting assemblies are connected to each other, and the arc-shaped plates of the limiting assemblies enclose a through hole for the pipe to pass through.

[0010] A cutting saw blade, the cutting saw blade is arranged on the front side of the clamping device.

[0011] A laser recognition device, the laser recognition device is assembled on the construction platform, and a laser line emitted by the laser recognition device is arranged in the same plane as the end surface of the cutting saw blade away from the clamping device.

[0012] Preferably, the traveling device comprises a fixed seat and an electric control gear, the electric control gear is rotatably assembled on the fixed seat, the arc-shaped track is a rack engaged with the electric control gear, and the rack is arranged on the side of the housing away from the arc-shaped plate.

[0013] Preferably, the electric control gear comprises an electric control motor, a gear shaft, a bearing and a gear body, the bearing is assembled on the fixed seat, the gear shaft is arranged in the bearing, the electric control motor is in transmission cooperation with the gear shaft, the gear body is rotatably assembled with the gear shaft, and the gear body is engaged with the rack.

[0014] Preferably, a guide track extending along the circumferential direction of the pipe is further arranged in the housing, the guide track is arranged on the side of the housing close to the arc-shaped plate, a driven wheel is further arranged on the fixed seat, and the driven wheel is rotatably assembled on the guide track.

[0015] Preferably, the telescopic rod comprises an electric control hydraulic oil cylinder and an oil cylinder rod in transmission connection with the electric control hydraulic oil cylinder, the electric control hydraulic oil cylinder is used for driving the oil cylinder rod to extend and retract, the oil cylinder rod is connected to the arc-shaped plate, and the electric control hydraulic oil cylinder is fixedly assembled with the traveling device.

[0016] Preferably, a ring-shaped laser detection device is further included, which is mounted on the clamping device and is arranged in a ring shape with several groups of lasers.

[0017] Preferably, a support device is further included, which is mounted on the construction platform and is arranged on both sides of the clamping device, and the support device includes the limiting assembly, and a pipe support is arranged on the arc-shaped plate of the limiting assembly, and the height of the arc-shaped plate is flush with the height of the conveying shaft.

[0018] Preferably, each group of limiting assemblies includes three groups of telescopic rods and three groups of walking devices, and the two groups of telescopic rods on both sides are arranged in axial symmetry with the group of telescopic rods in the center as the axis.

[0019] A pipe cutting method using the pipe sawing machine system of any of the above technical solutions, comprising the following steps:

[0020] S1, placing a pipe to be cut on the construction platform, the front end of the pipe passing through the perforation of the clamping device, and the rear end of the pipe being supported on the support device;

[0021] S2, the ring-shaped laser detection device scans the outer surface of the pipe to detect the circumference C, the major axis A and the standard diameter Φ of the pipe;

[0022] S3, the clamping device and the limiting assembly of the support device work, the walking device moves on the arc-shaped track of the shell, and the telescopic rod is elongated to drive the arc-shaped plate to deform, so that the arc-shaped plate deforms towards the pipe, and the inner diameter of each arc-shaped plate is reduced to 110%-120% of the major axis A;

[0023] S4, determining the cutting length L of the pipe to be cut, rotating the output shaft of the construction platform to drive the pipe to move axially forward, and when the laser recognition device detects the front end of the pipe, the output shaft stops moving, the pipe moves to the initial position of the cutting length, and the laser recognition device is turned off;

[0024] S5, calculating the angle α that the output shaft needs to rotate according to the cutting length L and the diameter D of the output shaft, rotating the output shaft to drive the pipe to move forward, and stopping the rotation of the output shaft when the output shaft rotates to the angle α;

[0025] S6, the clamping device and the limiting assembly of the support device work, the walking device moves on the arc-shaped track of the shell, and the telescopic rod is elongated to drive the arc-shaped plate to deform, so that the arc-shaped plate deforms towards the pipe, and the inner diameter of each arc-shaped plate is reduced to the standard diameter Φ;

[0026] S7, the cutting saw blade works, the pipe is cut, each limiting assembly works, the walking device moves on the arc track of the shell, and the telescopic rod retracts to drive the arc plate to deform, the diameter of the arc plate increases to release the pipe, and the pipe cutting is completed.

[0027] Preferably, in step S3, the telescopic rod is elongated at a first speed; in step S6, when each limiting assembly works, the telescopic rod is first elongated at a second speed, so that the inner diameter of the arc plate is first reduced to the long axis A, and then the telescopic rod is elongated at a third speed, so that the inner diameter of the arc plate is reduced to the standard diameter Φ, wherein the first speed, the second speed and the third speed decrease in turn.

[0028] Compared with the prior art, the pipe sawing machine system and the pipe cutting method have the beneficial effects that the cutting saw blade and the laser recognition device are arranged on the construction platform, the laser line of the laser recognition device is coplanar with the end surface of the cutting saw blade away from the clamping device, the front end of the pipe is first moved below the cutting saw blade and recognized by the laser recognition device when the cutting saw blade cuts the pipe, the axial movement distance of the pipe under the driving of the conveying shaft is the length of the pipe to be cut, so that the position of the pipe is automatically adjusted, the cutting length is automatically measured and fed, and the error is reduced; the clamping device is formed by a plurality of limiting assemblies, the telescopic rods of the limiting assemblies deform different positions of the arc plate when they are telescoped, the inner diameter of the arc plate is adjusted, the walking device moves along the arc track in the shell at the same time, the angle change between the telescopic rods and the arc plate is compensated, the telescopic rods are always perpendicular to the arc plate is ensured, the pipe is clamped and limited by the arc plate, the size of the clamping force is adjusted by the telescoping length of the telescopic rods, the observation and experience judgment of the operator is not relied on, the pipe is not clamped flat and scrapped due to excessive clamping force, the plurality of limiting assemblies of the clamping device are arranged around the pipe, the arc plate and the outer surface of the pipe are both arc surfaces in full contact, the contact area is large, the plurality of limiting assemblies are symmetrically arranged, the ovality of the pipe is prevented from deteriorating, the pipe is ensured to be aligned, the pipe is prevented from shifting, and the cut quality is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a structural schematic view of the pipe sawing machine system of the present application;

[0030] Figure 2 is a structural schematic view of the clamping device of the pipe sawing machine system of the present application; Figure 1

[0031] Figure 3 is an A-A line sectional view of the pipe sawing machine system of the present application; Figure 2

[0032] Figure 4 is a B-B line sectional view of the pipe sawing machine system of the present application; Figure 2

[0033] Figure 5 is​​​Figure 4 CC-line section view;

[0034] Figure 6 yes Figure 1 A schematic diagram of the support device for the pipe sawing system.

[0035] In the diagram, 1. Construction platform; 2. Limiting component; 21. Arc plate; 22. Telescopic rod; 221. Electro-hydraulic cylinder; 222. Cylinder rod; 23. Traveling device; 231. Fixed seat; 232. Electro-controlled gear; 2321. Electro-controlled motor; 2322. Gear shaft; 2323. Bearing; 2324. Gear body; 24. Housing; 241. Arc track; 242. Guide track; 25. Driven wheel; 3. Clamping device; 4. Cutting saw blade; 5. Laser recognition device; 6. Conveyor shaft; 7. Ring laser detection device; 8. Support device. Detailed Implementation

[0036] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0037] A preferred embodiment of the pipe sawing system of the present invention, such as... Figures 1 to 6 As shown, the pipe sawing system includes a construction platform 1, a limiting component 2, a clamping device 3, a cutting saw blade 4, and a laser recognition device 5. The construction platform 1 serves as the supporting foundation, and the limiting component 2, the clamping device 3, the cutting saw blade 4, and the laser recognition device 5 are all mounted on the construction platform 1.

[0038] Construction platform 1 is a frame structure formed by connecting profiles, providing a fixed spatial position for pipe measurement, clamping, and support, positioning the pipe to be cut, and enabling precise, intelligent, and automatic feeding of the pipe on construction platform 1. Several conveyor shafts 6 are rotatably mounted on construction platform 1 via bearings 2323. The conveyor shafts 6 are arranged side-by-side, with all shafts at the same height and their upper surfaces on the same horizontal plane. The conveyor shafts 6 are used to transport the pipe axially. When pipe cutting is required, the pipe is supported on the conveyor shaft 6, perpendicular to it. Rotation of the conveyor shaft 6 drives the pipe axially.

[0039] like Figure 2 , Figure 3 , Figure 4 and Figure 6As shown, the limiting assembly 2 comprises arc-shaped plates 21, telescopic rods 22, walking devices 23 and a housing 24. The arc-shaped plates 21 have contact surfaces for contacting the outer wall of the pipe. In this embodiment, the arc-shaped plates 21 are spring steel plates, so that the arc-shaped plates 21 can be deformed to change the arc-shaped diameter and the center of the inner surface of the arc-shaped plates 21. When the arc-shaped plates 21 contact the outer wall of the pipe, the axial direction of the arc-shaped plates 21 is the same as the axial direction of the pipe, and the center of the inner diameter of each arc-shaped plate 21 always remains concentric. In this embodiment, as shown, the rear end surface of the arc-shaped plate 21 is inwardly machined into a bevel, i.e. the arc-shaped plate 21 is shaped like a horn with a gradually increasing tail end diameter. The bevel has a guiding effect on the pipe, preventing the pipe from being stuck by vertical contact with the tail end surface of the arc-shaped plate 21 during movement from the rear to the front, and ensuring smooth forward movement of the pipe. Figure 5

[0040] The telescopic rods 22 and the walking devices 23 are each arranged in at least two groups along the circumferential direction of the arc-shaped plates 21, and the telescopic rods 22 and the walking devices 23 are arranged one-to-one. Each group of telescopic rods 22 is uniformly distributed in the circumferential direction of the arc-shaped plates 21 to ensure balanced force of the telescopic rods 22 on the arc-shaped plates 21. One end of the telescopic rod 22 is connected to the side of the arc-shaped plate 21 away from the contact surface, and the other end is connected to the walking device 23. The telescopic rod 22 is perpendicular to the arc-shaped plate 21, and the telescopic rod 22 changes the inner diameter of the arc-shaped plate 21 when it is extended or retracted. At this time, the position of the end of the telescopic rod 22 away from the arc-shaped plate 21 changes, and the walking of the walking device 23 in the housing 24 can compensate for the displacement of the telescopic rod 22, thereby ensuring that the telescopic rod 22 and the arc-shaped plate 21 are always perpendicular during the change of the inner diameter of the arc-shaped plate 21.

[0041] The housing 24 is assembled on the construction platform 1, and the housing 24 has an arc-shaped track 241 inside. After the housing 24 is assembled, the arc-shaped track 241 extends along the circumferential direction of the pipe, and the walking device 23 is assembled on the arc-shaped track 241, i.e. the walking device 23 can move on the arc-shaped track 241. When the walking device 23 moves in the arc-shaped track 241, it drives the telescopic rod 22 to move synchronously, thereby changing the position of the telescopic rod 22 and ensuring that the telescopic rod 22 is perpendicular to the arc-shaped plate 21.

[0042] As shown, Figure 2 ​As shown, the clamping device 3 comprises several groups of limiting assemblies 2, the housings 24 of each group of limiting assemblies 2 are connected to each other, and the connection of the housings 24 makes the arc-shaped tracks 241 form a closed ring structure. The arc-shaped plates 21 of each group of limiting assemblies 2 enclose a through hole, and the through hole is used for the pipe to pass through axially. The groups of limiting assemblies 2 are distributed along the circumference of the pipe, so that the groups of limiting assemblies 2 are arranged symmetrically in the circumferential direction, the arc-shaped plates 21 of each group of limiting assemblies 2 are in full contact with the outer surface of the pipe, the limiting assemblies 2 symmetrically clamp the pipe, prevent the deterioration of the ovality of the pipe, and have the effect of correcting the ovality. In this embodiment, the clamping device 3 comprises four groups of limiting assemblies 2, and the housing 24 of each group of limiting assemblies 2 is a 90-degree circular arc.

[0043] The cutting saw blade 4 is arranged on the front side of the clamping device 3, where the front-rear direction refers to the axial movement direction of the pipe, and the pipe moves from back to front. The pipe passes through the through hole of the clamping device 3 under the action of the conveying shaft 6, and the pipe passes below the cutting saw blade 4, and the cutting saw blade 4 can cut the pipe.

[0044] The laser recognition device 5 is assembled on the construction platform 1 and located on the front side of the clamping device 3, and the laser line emitted by the laser recognition device 5 is arranged in the same plane as the end face of the cutting saw blade 4 away from the clamping device 3, that is, the laser line emitted by the laser recognition device 5 is in the same vertical plane as the front end face of the cutting saw blade 4. In this embodiment, the laser recognition device 5 is located at the 6 o'clock position and is perpendicular to the horizontal plane. When the front end outer surface of the pipe is recognized by the laser recognition device 5 during the automatic forward movement of the pipe on the construction platform 1 through the clamping device 3, the conveying shaft 6 stops rotating, the pipe stops moving forward, and the electric control system can record the position as the 0-point position of the cutting length; then the output shaft continues to convey the pipe to move, and according to the diameter of the output shaft and the angle of rotation, the axial displacement of the pipe can be obtained, so as to accurately calculate the cutting length of the pipe.

[0045] The pipe sawing machine system is provided with a cutting saw blade 4 and a laser recognition device 5 on the construction platform 1. Since the laser line of the laser recognition device 5 is coplanar with the end face of the cutting saw blade 4 away from the clamping device 3, the front end of the pipe is first moved to below the cutting saw blade 4 and is recognized by the laser recognition device 5 when the pipe is cut, and the axial movement distance of the pipe under the driving of the conveying shaft 6 is the length of the pipe to be cut, thereby realizing automatic adjustment of the pipe position, automatic measurement and feeding of the cutting length and reducing the error; the clamping device 3 is formed by a plurality of limiting assemblies 2, the extension and retraction of the extension rods 22 of the limiting assemblies 2 drives the deformation of different positions of the arc-shaped plate 21, adjusts the inner diameter of the arc-shaped plate 21, and at the same time, the walking device 23 moves along the arc-shaped track 241 in the shell 24, compensates the angle change between the extension rod 22 and the arc-shaped plate 21, ensures that the extension rod 22 is always perpendicular to the arc-shaped plate 21, clamps and limits the pipe through the arc-shaped plate 21, adjusts the size of the clamping force through the extension and retraction length of the extension rod 22, does not rely on the observation and experience judgment of the operator, avoids the pipe from being clamped flat and scrapped due to excessive clamping force, the plurality of limiting assemblies 2 of the clamping device 3 are arranged around the pipe, the arc-shaped plate 21 and the outer surface of the pipe are both arc surfaces in full contact, the contact area is large, the plurality of limiting assemblies 2 are symmetrically arranged, the ovality of the pipe is prevented from deteriorating, the pipe is ensured to be aligned, the pipe will not be offset, and the cut quality is ensured.

[0046] Preferably, the walking device 23 comprises a fixed seat 231 and an electric control gear 232, the electric control gear 232 is rotationally assembled in the fixed seat 231, and the arc-shaped track 241 is a rack meshed with the electric control gear 232, and the rack is arranged on the side of the shell 24 away from the arc-shaped plate 21.

[0047] The walking device 23 is formed by the fixed seat 231 and the electric control gear 232, and the electric control gear 232 moves on the arc-shaped track 241 formed by the rack to realize movement through gear meshing. The tooth spacing of the rack is fixed, the electric control gear 232 can adjust the walking distance on the rack by controlling the rotation angle, the displacement of the walking device 23 is accurately controlled through the number of meshed teeth, the extension and retraction distance of the extension rod 22 is matched, and the extension rod 22 is ensured to be perpendicular to the arc-shaped plate 21. In the embodiment, the shell 24 is a grooved metal, the arc-shaped track 241 is fixed on the inner wall of the shell 24, the arc-shaped track 241 can be a continuous or intermittent structure, and the two ends of the arc-shaped track 241 limit the electric control gear 232.

[0048] Preferably, the electric control gear 232 comprises an electric control motor 2321, a gear shaft 2322, a bearing 2323 and a gear body 2324, the bearing 2323 is assembled in the fixed seat 231, the gear shaft 2322 is inserted in the bearing 2323, the electric control motor 2321 is in transmission cooperation with the gear shaft 2322, the gear body 2324 is rotationally assembled with the gear shaft 2322, and the gear body 2324 is meshed with the rack.

[0049] The electric control motor 2321 is in transmission cooperation with the gear shaft 2322, the electric control motor 2321 drives the gear shaft 2322 to rotate, the gear shaft 2322 drives the gear body 2324 to rotate synchronously, the gear body 2324 rotates on the arc-shaped track 241 formed by the rack, moves through the meshing of the gear, and thus changes the position of the walking device 23. The bearing 2323 is arranged between the fixed seat 231 and the gear shaft 2322, so as to reduce the resistance when the gear body 2324 rotates and accurately adjust the displacement of the walking device 23.

[0050] Preferably, the housing 24 is further provided with a guide track 242 extending along the circumference of the pipe, the guide track 242 is arranged on the side of the housing 24 close to the arc-shaped plate 21, and the fixed seat 231 is further provided with a driven wheel 25, the driven wheel 25 is rollingly assembled in the guide track 242.

[0051] The housing 24 is further provided with the guide track 242, the guide track 242 and the arc-shaped track 241 are respectively located on the two sides of the housing 24, and when the driven wheel 25 rolls in the guide track 242, the driven wheel 25 and the electric control gear 232 are respectively supported on the inner and outer sides of the housing 24, so as to increase the stability when the walking device 23 moves. In the embodiment, the guide track 242 has two groups, the two groups of guide tracks 242 are arranged at intervals and located on the two sides of the arc-shaped track 241, the driven wheel 25 is rollingly assembled in each guide track 242, and the two driven wheels 25 and the electric control gear 232 can form a stable triangular support structure, so as to ensure the meshing of the electric control gear 232 and the rack of the arc-shaped track 241 and avoid being stuck.

[0052] Preferably, the telescopic rod 22 comprises an electric control hydraulic oil cylinder 221 and an oil cylinder rod 222 in transmission connection with the electric control hydraulic oil cylinder 221, the electric control hydraulic oil cylinder 221 is used for driving the oil cylinder rod 222 to extend and retract, the oil cylinder rod 222 is connected with the arc-shaped plate 21, and the electric control hydraulic oil cylinder 221 is fixedly assembled with the walking device 23.

[0053] The telescopic rod 22 is formed by the electric control hydraulic oil cylinder 221 and the oil cylinder rod 222, the electric control hydraulic oil cylinder 221 can drive the oil cylinder rod 222 to extend and retract, so as to change the inner diameter of the arc-shaped plate 21. The electric control hydraulic oil cylinder 221 and the oil cylinder rod 222 are sensitive in response, and the inner diameter of the arc-shaped plate 21 can be accurately adjusted by controlling the extension length of the telescopic rod 22.

[0054] Preferably, the annular laser detection device 7 is assembled on the clamping device 3, and the annular laser detection device 7 is annularly arranged at intervals.

[0055] The annular laser detection device 7 is arranged on the clamping device 3 and is arranged in annular intervals in several groups. When the pipe is in the process of forward movement, the annular laser detection device 7 can identify the pipe and perform 360-degree scanning detection on the outer surface of the pipe. According to the distance from all laser emitting points to the outer surface of the pipe, the control system automatically generates the outer shape track (generally circular or elliptical shape) of the pipe, automatically generates the circumference C and the major axis A of the outer surface of the pipe, and feeds back to the control system to automatically generate the standard diameter Φ of the pipe. When the outer surface shape of the pipe is a standard circle, the standard diameter Φ is equal to the major axis A.

[0056] Through the data measured by the annular laser detection device 7, the control system can control the telescopic rods 22 and the walking devices 23 of the limiting assembly 2 to move, adjust the inner diameter of the arc-shaped plate 21, so that the contact surface of the arc-shaped plate 21 is in contact with the outer surface of the pipe, and the pipe is limited. It is suitable for limiting pipes of different diameters. In this embodiment, the annular laser detection device 7 is fixedly assembled on the shell 24.

[0057] Preferably, the support device 8 is assembled on the construction platform 1, and the support device 8 is arranged on the front and rear sides of the clamping device 3. The support device 8 comprises the limiting assembly 2, and the pipe is supported by the arc-shaped plate 21 of the limiting assembly 2. The height of the arc-shaped plate 21 is flush with the height of the conveying shaft 6.

[0058] As shown in Figure 6 The construction platform 1 is provided with the support device 8 on the front and rear sides of the clamping device 3. The support device 8 is formed by the limiting assembly 2, and the structure of the limiting assembly 2 of the support device 8 is the same as that of the clamping device 3. Through the electric control system, the actions of the limiting assemblies 2 can be synchronized. The support device 8 can support and limit the front and rear ends of the pipe. By adjusting the contact surface of the arc-shaped plate 21 to be in contact with the outer surface of the pipe, the support device 8 can effectively constrain the pipe in the later stage of pipe cutting. When the pipe is about to be cut off, the friction force of the cutting saw blade 4 will not cause the pipe to deform and displace at the cutting position. The cut pipe will not relatively displace to affect the cutting quality or cause the cutting saw blade 4 to break, thereby avoiding safety accidents and safety hazards.

[0059] In this embodiment, the contact surface of the arc-shaped plate 21 of the limiting assembly 2 of the support device 8 is always in the same horizontal plane as the upper surface of the conveying shaft 6. The centers of the arc-shaped plates 21 of the limiting assemblies 2 of the support device 8 and the clamping device 3 are always concentric and coaxial, that is, the center of the pipe to be cut.

[0060] Preferably, each group of limiting assemblies 2 comprises three groups of telescopic rods 22 and three groups of walking devices 23. The two groups of telescopic rods 22 located on the two sides are arranged symmetrically about the group of telescopic rods 22 located in the center.

[0061] Each set of limiting assembly 2 has three sets of telescopic rods 22 and three sets of walking devices 23, the three sets of telescopic rods 22 are symmetrically arranged, when the inner diameter of the arc-shaped plate 21 is adjusted, the telescopic rods 22 on both sides are synchronously telescoped and the walking devices 23 are synchronously moved, while the telescopic rod 22 in the center is telescoped and the walking device 23 connected therewith is stationary, so that the arc-shaped plate 21 is synchronously moved on both sides, thereby realizing uniform adjustment of the inner diameter of the arc-shaped plate 21, and the contact surface of the arc-shaped plate 21 uniformly contacts the outer surface of the pipe, the arc-shaped plate 21 realizes circumferentially symmetric clamping on the pipe, corrects the ovality of the pipe, ensures that the pipe is aligned, and the axial direction of the pipe cannot be easily changed.

[0062] The application also provides a preferred embodiment of a pipe cutting method, which adopts the pipe sawing machine system of any one of the above embodiments, and comprises the following steps:

[0063] S1, placing a pipe to be cut into the construction platform 1, the front end of the pipe passing through the perforation of the clamping device 3, and the rear end of the pipe being supported on the supporting device 8;

[0064] S2, the annular laser detection device 7 scans the outer surface of the pipe to detect the circumference C, the major axis A and the standard diameter Φ of the pipe;

[0065] S3, each limiting assembly 2 of the clamping device 3 and the supporting device 8 works, the walking device 23 moves on the arc-shaped track 241 of the housing 24, and the telescopic rod 22 is elongated to drive the arc-shaped plate 21 to deform, so that the arc-shaped plate 21 is deformed towards the pipe, and the inner diameter of each arc-shaped plate 21 is reduced to 110%-120% of the major axis A;

[0066] S4, determining the cutting length L of the pipe to be cut, rotating the output shaft of the construction platform 1 to drive the pipe to move axially forward, stopping the output shaft when the front end of the pipe is detected by the laser recognition device 5, moving the pipe to the initial position of the cutting length, and closing the laser recognition device 5;

[0067] S5, calculating the angle α that the output shaft needs to rotate according to the cutting length L and the diameter D of the output shaft, rotating the output shaft to drive the pipe to move forward, and stopping the output shaft when the output shaft rotates to the angle α;

[0068] S6, each limiting assembly 2 of the clamping device 3 and the supporting device 8 works, the walking device 23 moves on the arc-shaped track 241 of the housing 24, and the telescopic rod 22 is elongated to drive the arc-shaped plate 21 to deform, so that the arc-shaped plate 21 is deformed towards the pipe, and the inner diameter of each arc-shaped plate 21 is reduced to the standard diameter Φ;

[0069] S7, the cutting saw blade 4 works, the pipe is cut, each limiting assembly 2 works, the walking device 23 moves on the arc track 241 of the shell 24, and the telescopic rod 22 retracts to drive the arc plate 21 to deform, the diameter of the arc plate 21 increases to release the pipe, and the pipe cutting is completed.

[0070] In step S1, after the pipe is placed on the construction platform 1, the attitude of the pipe is adjusted, the front end of the pipe does not reach the area of the laser recognition device 5 after passing through the perforation of the clamping device 3, that is, the laser recognition device 5 cannot recognize the pipe, at this time, the tail end of the pipe is supported on the supporting device 8 behind the clamping device 3, and the supporting device 8 is used to support the pipe to avoid movement of the pipe.

[0071] In step S2, the control system controls the annular laser detection device 7 to perform 360-degree scanning detection on the outer surface of the pipe, generates the outer shape track (generally circular or elliptical shape) of the pipe according to the distance from all laser emitting points to the outer surface of the pipe, and automatically generates the circumference C and the major axis A of the outer surface of the pipe. The control system can calculate the standard diameter Φ according to the circumference C and the major axis A, in particular, when the shape of the outer surface of the pipe is a standard circle, the major axis A is equal to the standard diameter Φ, the control system saves these data, which can provide support for subsequent limiting assembly 2 clamping the pipe, and can also limit pipes of different sizes.

[0072] In step S3, the control system controls the limiting assembly 2 of the clamping device 3 and the supporting device 8 to be the same at the same time, the electric control hydraulic oil cylinder 221 controls the oil cylinder rod 222 to extend to the center of the inner surface of the arc plate 21, at this time, the center of the arc plate 21 is not fixed, and moves vertically downward as the diameter of the arc plate 21 decreases. At the same time, the walking device 23 connected to the telescopic rod 22 on both sides moves on the arc track 241, and the electric control gear 232 moves on the rack to the telescopic rod 22 away from the center, until the inner diameter of the arc plate 21 is reduced to 110%-120% of the major axis A, at this time, the telescopic rod 22 of all limiting assemblies 2 stops working.

[0073] The inner diameter of the arc plate 21 is reduced to 110%-120% of the major axis A, the pipe is not subjected to extrusion force from the arc plate 21, and the pipe can still move forward and backward on the saw bed platform, at this time, the 6 o'clock position area of the pipe and the adjacent local area are in contact with the inner surface of the arc plate 21.

[0074] In step S4, the control system controls all conveying shafts 6 to rotate synchronously and uniformly, drives the pipe to move forward axially, and at this time, the laser recognition device 5 is turned on to recognize the position of the pipe. When the laser recognition device 5 detects the front end of the pipe, the control system records the position as the 0 point position of the cutting length of the pipe, and the automatic recognition and positioning of the front end of the pipe to be cut can be completed, which is convenient for subsequent automatic determination of the cutting length L of the pipe.

[0075] In step S5, when the pipe moves from the 0 point position to the cutting length L, the relationship among the cutting length L, the diameter D of the conveying shaft 6 and the angle α is α = L × 360° / πD. When the conveying shaft 6 automatically rotates to the angle α, the pipe completes the forward movement length L on the upper surface of the conveying shaft 6, that is, reaches the cutting position, and the automatic control of the cutting length is realized.

[0076] In step S6, the inner diameter of the arc-shaped plate 21 of the clamping device 3 and the support device 8 is reduced to the standard diameter Φ, which is less than or equal to the long axis A of the pipe. At this time, the contact surface of the arc-shaped plate 21 is in full contact with the outer surface of the pipe, and the complete clamping action of the pipe can be completed. This process not only clamps the pipe, but also corrects the ellipticity of the pipe, which not only ensures that the ellipticity of the pipe at the cutting position will not deteriorate after being clamped and cut, but also makes the ellipticity better (closer to the standard circle) than the data before cutting.

[0077] In step S7, the control system controls the cutting saw blade 4 to cut the pipe, and the front half of the cut pipe is clamped and positioned by the support device 8, so that the pipe will not displace to affect the cutting quality or cause the cutting saw blade 4 to break. In step S7, the limiting assembly 2 controls the inner diameter of the arc-shaped plate 21 to increase, and the inner diameter of the arc-shaped plate 21 can increase to the maximum position or stop at an appropriate position according to the diameter of the next pipe to be cut (20-30% larger than the long axis of the pipe outer diameter or the standard diameter). In this process, the telescopic rod 22 of the limiting assembly 2 moves quickly, and in this process, the contact surface of the arc-shaped plate 21 at the 6 o'clock position is in the same horizontal plane as the conveying shaft 6, and the telescopic rod 22 is perpendicular to the outer surface of the arc-shaped plate 21.

[0078] The above steps are repeated to complete the cutting of each pipe.

[0079] Preferably, in step S3, the telescopic rod 22 is elongated at a first speed; in step S6, when each limiting assembly 2 is working, the telescopic rod 22 is first elongated at a second speed, so that the inner diameter of the arc-shaped plate 21 is first reduced to the long axis A, and then the telescopic rod 22 is elongated at a third speed, so that the inner diameter of the arc-shaped plate 21 is reduced to the standard diameter Φ, wherein the first speed, the second speed and the third speed decrease in turn.

[0080] The first speed ranges from 20 to 30 cm / min in step S3, the second speed ranges from 10 to 15 cm / min in step S6, and the third speed ranges from 5 to 8 cm / min. The telescopic rod 22 first adjusts the inner diameter of the arc-shaped plate 21 to the long axis A, at this time, when the outer surface of the pipe is a standard circle, all the contact surfaces of the arc-shaped plate 21 are in full contact with the outer surface of the pipe, and the complete clamping action of the pipe is completed. When the outer surface of the pipe is an ellipse, only the contact surface of the arc-shaped plate 21 at the long axis position is in partial contact with the outer surface of the pipe, and the partial clamping action of the pipe is completed, and then the inner diameter of the arc-shaped plate 21 is adjusted to the standard diameter Φ, at this time, all the contact surfaces of the arc-shaped plate 21 are in full contact with the outer surface of the pipe, and the complete clamping action of the pipe is completed.

[0081] In summary, the embodiment of the present application provides a pipe sawing machine system and a pipe cutting method, the cutting saw blade and the laser recognition device are arranged on the construction platform, since the laser line of the laser recognition device is coplanar with the end surface of the cutting saw blade away from the clamping device, the front end of the pipe is first moved below the cutting saw blade and recognized by the laser recognition device when the cutting saw blade cuts the pipe, and the axial movement distance of the pipe under the driving of the conveying shaft is the length of the pipe to be cut, so that the position of the pipe is automatically adjusted, the cutting length is automatically measured and fed, and the error is reduced; the clamping device is formed by connecting a plurality of limiting assemblies, the telescopic rods of the limiting assemblies are deformed at different positions of the arc-shaped plate when they are telescoped, the inner diameter of the arc-shaped plate is adjusted, the walking device moves along the arc-shaped track in the shell at the same time, the angle change between the telescopic rod and the arc-shaped plate is compensated, the telescopic rod is always perpendicular to the arc-shaped plate is ensured, the pipe is clamped and limited by the arc-shaped plate, the size of the clamping and fixing force is adjusted by the telescoping length of the telescopic rod, the observation and experience judgment of the operator is not relied on, the pipe is prevented from being clamped flat and scrapped due to excessive clamping force, the plurality of limiting assemblies of the clamping device are arranged around the pipe, the arc-shaped plate and the outer surface of the pipe are both arc surfaces in full contact, the contact area is large, the plurality of limiting assemblies are symmetrically arranged, the ovality of the pipe is prevented from deteriorating, the pipe is ensured to be aligned, the pipe is prevented from being deviated, and the cut quality is ensured.

[0082] The above only describes the preferred embodiments of the present application, and it should be noted that those skilled in the art can make several improvements and replacements without departing from the technical principles of the present application, and these improvements and replacements should also be considered as the protection scope of the present application.

Claims

1. A pipe sawing machine system, characterized by The utility model relates to a kind of pipe cutting device, including: Construction platform (1), several parallelly arranged conveying shafts (6) are rotatably equipped on the construction platform (1), and the conveying shaft (6) is used to convey pipe axial movement; Limiting component (2), the limiting component (2) includes arc plate (21), telescopic rod (22), travelling device (23) and shell (24), the arc plate (21) has contact surface for contacting with pipe, the telescopic rod (22) and the travelling device (23) are both arranged with at least two groups along the circumferential direction of arc plate (21), one end of each telescopic rod (22) is connected with the side of arc plate (21) away from the contact surface, the other end is connected with the travelling device (23), the shell (24) is assembled in the construction platform (1), the shell (24) has arc-shaped track (241) extending along the circumferential direction of pipe, and the travelling device (23) is assembled in the arc-shaped track (241); Clamping device (3), the clamping device (3) includes several groups of limiting component (2), the shell (24) of each group of limiting component (2) is connected with each other, and the arc plate (21) of each group of limiting component (2) surrounds the perforation for pipe to pass through; Cutting saw blade (4), the cutting saw blade (4) is arranged at the front side of the clamping device (3); Laser recognition device (5), the laser recognition device (5) is assembled in the construction platform (1), and the laser line emitted by the laser recognition device (5) is arranged in the same plane with the end surface of the cutting saw blade (4) away from the clamping device (3); The travelling device (23) includes fixed seat (231) and electric control gear (232), the electric control gear (232) is rotatably assembled in the fixed seat (231), and the arc-shaped track (241) is a rack engaged with the electric control gear (232), and the rack is arranged on the side of the shell (24) away from the arc plate (21); The electric control gear (232) includes electric control motor (2321), gear shaft (2322), bearing (2323) and gear body (2324), the bearing (2323) is assembled in the fixed seat (231), the gear shaft (2322) is penetrated in the bearing (2323), the electric control motor (2321) is drivingly connected with the gear shaft (2322), the gear body (2324) is rotationally assembled with the gear shaft (2322), and the gear body (2324) is engaged with the rack; The shell (24) is further provided with guide rail (242) extending along the circumferential direction of pipe, the guide rail (242) is arranged on the side of the shell (24) close to the arc plate (21), and the fixed seat (231) is further provided with driven wheel (25), and the driven wheel (25) is rotatably assembled in the guide rail (242).

2. The pipe sawing machine system of claim 1, wherein, The telescopic rod (22) comprises an electrically-controlled hydraulic oil cylinder (221) and an oil cylinder rod (222) in transmission connection with the electrically-controlled hydraulic oil cylinder (221), the electrically-controlled hydraulic oil cylinder (221) is used for driving the oil cylinder rod (222) to stretch out and retract, the oil cylinder rod (222) is connected with the arc-shaped plate (21), and the electrically-controlled hydraulic oil cylinder (221) is fixedly assembled with the walking device (23).

3. The pipe sawing machine system of claim 2, wherein, Further comprising annular laser detection devices (7), the annular laser detection devices (7) are assembled on the clamping devices (3), and a plurality of groups of the annular laser detection devices (7) are arranged in a ring shape at intervals.

4. The pipe sawing machine system of claim 3, wherein, Further comprising support devices (8) assembled on the construction platform (1), the support devices (8) are arranged on the front and back sides of the clamping devices (3), the support devices (8) comprise the limiting assemblies (2), and pipe supports are arranged on the arc-shaped plates (21) of the limiting assemblies (2), the heights of the arc-shaped plates (21) are flush with the height of the conveying shaft (6).

5. The pipe sawing machine system of claim 4, wherein, Each group of the limiting assemblies (2) comprises three groups of the telescopic rods (22) and three groups of the walking devices (23), and two groups of the telescopic rods (22) on the two sides are arranged in axial symmetry with a group of the telescopic rods (22) in the center as the axis.

6. A method of cutting a pipe using the pipe sawing system of claim 5, characterized by The method comprises the following steps: S1, placing a pipe to be discharged on the construction platform (1), the front end of the pipe passes through the perforation of the clamping device (3), and the rear end of the pipe is supported on the support device (8); S2, the annular laser detection device (7) scans the outer surface of the pipe, and detects the circumference C, the major axis A and the standard diameter Φ of the pipe; S3, the limiting assemblies (2) of the clamping device (3) and the support device (8) work, the walking devices (23) move on the arc-shaped tracks (241) of the housings (24), and the telescopic rods (22) are elongated to drive the arc-shaped plates (21) to deform, so that the arc-shaped plates (21) deform towards the pipe, and the inner diameters of the arc-shaped plates (21) are reduced to 110%-120% of the major axis A; S4, determining the cutting length L of the pipe to be cut, rotating the output shaft of the construction platform (1) to drive the pipe to move axially forward, stopping the output shaft from moving when the front end of the pipe is detected by the laser recognition device (5), moving the pipe to the initial position of the cutting length, and turning off the laser recognition device (5); S5, calculating the angle α that the output shaft needs to rotate according to the cutting length L and the diameter D of the output shaft, rotating the output shaft to drive the pipe to move forward, and stopping the output shaft from rotating when the output shaft rotates to the angle α; S6, the limiting assemblies (2) of the clamping device (3) and the support device (8) work, the walking devices (23) move on the arc-shaped tracks (241) of the housings (24), and the telescopic rods (22) are elongated to drive the arc-shaped plates (21) to deform, so that the arc-shaped plates (21) deform towards the pipe, and the inner diameters of the arc-shaped plates (21) are reduced to the standard diameter Φ. S7, the cutting saw blade (4) works to cut the pipe, each limiting assembly (2) works, the walking device (23) moves on the arc track (241) of the shell (24), and the telescopic rod (22) is retracted to drive the arc plate (21) to deform, the diameter of the arc plate (21) increases to release the pipe, and the pipe cutting is completed.

7. The pipe cutting method of claim 6, wherein, In step S3, the telescopic rod (22) is elongated at a first speed; in step S6, when each limiting assembly (2) works, the telescopic rod (22) is first elongated at a second speed, so that the inner diameter of the arc plate (21) is first reduced to the major axis A, and then the telescopic rod (22) is elongated at a third speed, so that the inner diameter of the arc plate (21) is reduced to the standard diameter Φ, wherein the first speed, the second speed and the third speed decrease in turn.

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