A pipe cutting machine and cutting process thereof

Abstract

The present invention belongs to the technical field of pipe cutting machines, and in particular relates to a pipe cutting machine and a cutting process thereof, wherein the pipe cutting machine comprises a frame and a front chuck and a rear chuck mounted on the frame, wherein the front chuck comprises a first clamping mechanism for clamping and a driving mechanism for driving the first clamping mechanism to rotate, and the rear chuck comprises a support and a second clamping mechanism mounted on the support for clamping, and a profiling mechanism mounted at an output end of the second clamping mechanism and used for fitting the surface of a clamped pipe fitting, wherein the support is rotatably connected to the frame, and by arranging a profiling mechanism on the rear chuck, after the second clamping mechanism on the rear chuck clamps the pipe fitting, the fitting degree between the rear chuck and the pipe fitting can be effectively improved, thereby improving the stabilizing effect of the rear chuck on the pipe fitting and the rotation stability of the pipe fitting during cutting, thereby effectively ensuring the product quality after the pipe fitting is cut.

Description

Technical Field

[0001] The invention belongs to the technical field of pipe cutting machines, and in particular relates to a pipe cutting machine and a cutting process thereof. Background Art

[0002] Pipe cutting machines are mainly used for cutting round pipes, square pipes and other pipes. Laser cutting is usually used, which not only has high precision and fast cutting, but also has smooth incisions.

[0003] When a traditional pipe cutting machine performs laser cutting on larger and longer pipes, the front chuck and the rear chuck clamp the surface of the pipe and drive the pipe to rotate for laser cutting. The front chuck is usually used to clamp the end of one end of the pipe and is provided with a driving mechanism for driving the pipe to rotate. The rear chuck usually only supports and stabilizes the rotation of the pipe. However, larger and longer pipes are usually heavier, and the rear chuck does not fit the surface of the pipe completely. Therefore, when the pipe is driven to rotate, it is easy for the clamp to have a poor stabilizing effect on the pipe, resulting in a small range of deviation. This can easily affect the quality of the laser cutting incision, and then affect the quality of the product after the pipe is cut, which needs to be improved. Summary of the invention

[0004] The purpose of the present invention is to provide a pipe cutting machine and a cutting process thereof in view of the above-mentioned technical problems, so as to improve the fitting effect between the rear chuck and the pipe and the stabilizing effect on the pipe, and prevent the heavier pipe from deviating in a small range during rotation and affecting the product quality.

[0005] In view of this, the present invention provides a pipe cutting machine, comprising:

[0006] A frame, on which a laser cutting head is slidably mounted;

[0007] The front chuck includes a first clamping mechanism for clamping and a driving mechanism for driving the first clamping mechanism to rotate, and is slidably connected to the side of the frame;

[0008] The rear chuck comprises a support, a second clamping mechanism installed on the support for clamping, and a contouring mechanism installed at the output end of the second clamping mechanism and used for fitting the surface of the clamped pipe;

[0009] The support and the frame are rotatably connected.

[0010] In the above technical solution, further, the profiling mechanism includes:

[0011] The top block is installed at the output end of the second clamping mechanism and has a plurality of circular holes extending through the inside thereof along the clamping direction of the second clamping mechanism, and the plurality of circular holes are arranged in a matrix;

[0012] A plurality of profiling blocks are provided and are respectively slidably connected in the circular holes, and one end of the profiling blocks extends out of the top block;

[0013] The first spring is installed in the circular hole, and two ends thereof are respectively in contact with the contour block and the output end of the second clamping mechanism.

[0014] In the above technical solution, further:

[0015] An annular protrusion is provided on the inner wall of the plurality of circular holes to prevent the profiling block from sliding out of the circular holes;

[0016] The first spring is always in a compressed state, and a side of the top block away from the second clamping mechanism is an arc-shaped surface.

[0017] In the above technical solution, further, the second clamping mechanism includes:

[0018] A plurality of cylinders are provided and are circumferentially mounted on the support, and the output ends of the cylinders are all facing the axis side of the rear chuck;

[0019] The air guide pipe has one end connected to an air supply source and the other end connected to the cylinder and is used to supply air to the cylinder.

[0020] In the above technical solution, further, it also includes:

[0021] A sub-branch pipe, one end of which is connected to the air guide pipe, and the other end is connected to the top block, and an automatic control valve is provided on the sub-branch pipe;

[0022] Among them, an air cavity connected with the sub-branch pipe and multiple circular holes is opened in the top block, and the air cavity is provided with a pressure relief structure, and the profiling block includes a hemispherical abutment and a piston part slidably connected to the inner wall of the circular hole, and an annular groove with a sealing ring installed is opened on the surface of the piston part.

[0023] In the above technical solution, further, the automatic control valve includes:

[0024] The valve body has an air inlet and an air outlet at both ends respectively connected to the sub-pipes;

[0025] The valve core is slidably connected in the valve body and is used for opening and closing the valve body;

[0026] The second spring is installed in the valve body, and its two ends are respectively in contact with the valve core and the inner wall of the valve body;

[0027] The force that causes the second spring to be compressed to push open the valve core is greater than the force that causes the cylinder to open and the force that causes the first spring to be compressed.

[0028] In the above technical solution, further, it also includes:

[0029] A feeding mechanism is provided on the side of the frame along the sliding direction of the front chuck and is used for lifting and lowering the pipe fittings and pushing them to one side of the frame;

[0030] The length dimension of the feeding mechanism along the sliding direction of the front chuck is greater than the length dimension of the front chuck along its sliding direction.

[0031] In the above technical solution, further, the feeding mechanism includes:

[0032] Base, mounted on the side of the rack;

[0033] A bracket is horizontally slidably connected to the base;

[0034] A support seat is vertically slidably connected to the bracket and is used to place and support the pipe fittings;

[0035] The driving assembly comprises a first driving member installed on the base for driving the bracket to move horizontally and a second driving member installed on the bracket for driving the support seat to move up and down.

[0036] In the above technical solution, further, it also includes:

[0037] A sliding member is mounted on the side of the frame, and the rear chuck and the front chuck are both mounted on the sliding member and slidably connected to the frame;

[0038] There are multiple rear chucks, and the length dimension along the sliding direction of the rear chuck is smaller than the length dimension of the feeding mechanism along the sliding direction of the front chuck.

[0039] The present invention provides a cutting process of a pipe cutting machine, comprising the following steps:

[0040] S1: Place the pipe fittings on the feeding mechanism;

[0041] S2: The feeding mechanism drives the pipe to move to the side of the frame and moves the front chuck to clamp one end of the pipe;

[0042] S3: moving the multiple rear chucks toward the front chuck, and during the movement of the rear chucks, the feeding mechanisms corresponding to the positions of the multiple rear chucks are lowered and pulled back horizontally;

[0043] S4: After the rear chuck moves into position, the pipe fitting is clamped by multiple cylinders, and the profiling mechanism profiles the surface of the pipe fitting;

[0044] S5: The laser cutting head moves to the pipe cutting position;

[0045] S7: The laser cutting head cuts the pipe, and the driving mechanism drives the first clamping mechanism to rotate one circle, and drives the second clamping mechanism and the pipe to rotate one circle, thereby completing the cutting;

[0046] S8: The multiple rear chucks cooperate with each other and drive the pipe to move to the front chuck, and the front chuck clamps one end of the pipe;

[0047] S9: Repeat S3-S9 until the pipe is cut;

[0048] Wherein, the profiling step of profiling the surface of the pipe fitting in S4 and S5 includes:

[0049] S40: The air supply source supplies air into the airway tube;

[0050] S41: Under the action of the second spring, the airflow enters the cylinder in advance and pushes the cylinder to clamp the pipe;

[0051] S42: the plurality of first springs are compressed, the plurality of profiling blocks are closely attached to the surface of the pipe fitting, and profiling is completed;

[0052] S43: As the air pressure continues to increase, the second spring is compressed, the valve core is opened, the air flow enters the air cavity through the sub-pipe, and the contour block is locked by pressure maintenance.

[0053] The beneficial effects of the present invention are:

[0054] 1. By arranging a profiling mechanism on the rear chuck, after the second clamping mechanism on the rear chuck clamps the pipe fitting, the degree of fit between the rear chuck and the pipe fitting can be effectively improved, thereby improving the stabilizing effect of the rear chuck on the pipe fitting and the stability of the rotation of the pipe fitting during cutting, thereby effectively ensuring the product quality after the pipe fitting is cut.

[0055] 2. By adopting the configuration of the profiling block and the first spring, it can be effectively ensured that multiple profiling blocks are in contact with the surface of the pipe, thereby effectively ensuring the degree of contact between the rear chuck and the pipe fitting, and ensuring the stability of the pipe rotation. After the multiple profiling blocks are in contact with the surface of the pipe according to the shape of the pipe surface, and through the opening of the air cavity connected to the circular hole in the sub-branch pipe and the top block, the profiling block can be locked by air pressure, effectively preventing the profiling block from moving and affecting the degree of contact between the rear chuck and the pipe fitting, and further ensuring the stability of the pipe rotation.

[0056] 3. By adopting the self-control valve, after the cylinder pushes the profiling component to perform profiling and clamping, the profiling block is locked, which effectively ensures the self-control effect, and does not require the action of an additional power source. The profiling block can be locked with the help of the power source of the cylinder, which effectively reduces energy consumption and achieves a good energy-saving effect.

[0057] 4. By adopting the setting of multiple rear chucks, that is, with the cooperation of multiple rear chucks, the pipe can be axially transported to improve the convenience of pipe cutting, and the feeding mechanism also adopts multiple ones, which can be lowered and pulled back, so as to avoid the movement of the front chuck and the rear chuck, effectively improving the convenience of pipe feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 It is a schematic diagram of the structure of the present invention;

[0059] Figure 2 It is a structural schematic diagram of the rear card seat of the present invention;

[0060] Figure 3 It is a front view of the rear card holder of the present invention;

[0061] Figure 4 The present invention Figure 3 The enlarged view of point A in the middle;

[0062] Figure 5 The present invention Figure 4 The enlarged view of point B in the middle;

[0063] Figure 6 The present invention Figure 4 Enlarged view of point C in the middle;

[0064] The markings in the figure are as follows: 1. frame; 2. laser cutting head; 3. front chuck; 30. first clamping mechanism; 31. driving mechanism; 4. rear chuck; 40. support; 41. second clamping mechanism; 410. cylinder; 411. air guide tube; 42. profiling mechanism; 420. top block; 421. round hole; 422. profiling block; 4220. hemispherical abutment; 4221. piston; 4222. sealing ring; 4223. annular groove; 423. first spring; 424. annular protrusion; 425. air cavity; 43. sub-branch; 44. automatic valve; 440. valve body; 441. air inlet end; 442. air outlet end; 443. valve core; 444. second spring; 45. pressure relief structure; 5. feeding mechanism; 50. base; 51. bracket; 52. support seat; 6. sliding part. DETAILED DESCRIPTION

[0065] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0066] Embodiment 1:

[0067] This embodiment provides a pipe cutting machine, comprising:

[0068] A frame 1 is slidably mounted with a laser cutting head 2;

[0069] The front chuck 3 includes a first clamping mechanism 30 for clamping and a driving mechanism 31 for driving the first clamping mechanism 30 to rotate, and is slidably connected to the side of the frame 1;

[0070] The rear chuck 4 comprises a support 40, a second clamping mechanism 41 mounted on the support 40 for clamping, and a contouring mechanism 42 mounted at the output end of the second clamping mechanism 41 and for fitting to the surface of the clamped pipe;

[0071] The support 40 is rotatably connected to the frame 1;

[0072] Meanwhile, the specific structures of the laser cutting head 2, the front chuck 3, and the first clamping mechanism 30 and the driving mechanism 31 included therein are all existing mature technologies, which are known to the technicians from the traditional pipe cutting machine and will not be described in detail here;

[0073] The support 40 and the second clamping mechanism may be connected by a bearing.

[0074] It can be seen from the present embodiment that by providing a contouring mechanism 42 on the rear chuck 4, after the second clamping mechanism 41 on the rear chuck 4 clamps the pipe fitting, the degree of fit between the rear chuck 4 and the pipe fitting can be effectively improved, thereby improving the stabilizing effect of the rear chuck 4 on the pipe fitting and the stability of the rotation of the pipe fitting during cutting, thereby effectively ensuring the product quality after the pipe fitting is cut.

[0075] Embodiment 2:

[0076] This embodiment provides a pipe cutting machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features. The profiling mechanism 42 includes:

[0077] The top block 420 is installed at the output end of the second clamping mechanism 41, and has a plurality of circular holes 421 extending through the inside along the clamping direction of the second clamping mechanism 41, and the plurality of circular holes 421 are arranged in a matrix;

[0078] A plurality of profiling blocks 422 are provided and are respectively slidably connected in the circular holes 421, and one end of the profiling block 420 is extended;

[0079] The first spring 423 is installed in the circular hole 421 , and two ends thereof are respectively in contact with the contour block 422 and the output end of the second clamping mechanism 41 .

[0080] It can be seen from the present embodiment that by adopting the setting of the profiling block 422 and the first spring 423, it can effectively ensure that the multiple profiling blocks 422 are in contact with the surface of the pipe, thereby effectively ensuring the degree of contact between the rear chuck 4 and the pipe fitting, thereby ensuring the stability of the pipe during rotation, preventing deviation, and improving product quality. In addition, the multiple circular holes 421 are arranged in a matrix, which can effectively improve the adaptation effect and ensure the degree of contact between the rear chuck 4 and the pipe fitting.

[0081] Embodiment 3:

[0082] This embodiment provides a pipe cutting machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0083] An annular protrusion 424 is provided on the inner wall of the plurality of circular holes 421 to prevent the profiling block 422 from sliding out of the circular holes 421;

[0084] The first spring 423 is always in a compressed state, and the side of the top block 420 away from the second clamping mechanism 41 is an arc-shaped surface;

[0085] At the same time, an integrated structure may be adopted between the annular protrusion 424 and the top block 420 .

[0086] It can be seen from this embodiment that by forming an annular protrusion 424 on the inner wall of the circular hole 421, the profiling block 422 can be effectively prevented from sliding out of the circular hole 421, and the first spring 423 is always in a compressed state, that is, it can effectively ensure that the profiling block 422 is always in close contact with the surface of the pipe fitting, improve the fitting effect, ensure stability, and make the side of the top block 420 away from the second clamping mechanism 41 into an arc surface, so that when dealing with different circular pipe diameters, it can effectively ensure that the profiling block 422 acts on the original pipe surface;

[0087] Furthermore, when clamping a square pipe, it is preferred to align the second clamping mechanism 41 at a right angle, that is, avoid aligning the second clamping mechanism 41 with a straight edge, which can effectively ensure the effect of the profiling mechanism 42 on improving the clamping stability of the pipe.

[0088] Embodiment 4:

[0089] This embodiment provides a pipe cutting machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the second clamping mechanism 41 includes:

[0090] The cylinder 410 is provided in plurality and is circumferentially mounted on the support 40, and the output ends thereof are all oriented toward the axis of the rear chuck 4;

[0091] An air guide pipe 411, one end of which is connected to an air supply source, and the other end of which is connected to the air cylinder 410 and is used to supply air to the air cylinder 410;

[0092] The air supply source may be an air compressor.

[0093] It can be seen from this embodiment that by using multiple cylinders 410 and directing their output ends toward the axis of the rear chuck 4, the multi-angle clamping of the pipe is improved, effectively ensuring stability.

[0094] Embodiment 5:

[0095] This embodiment provides a pipe cutting machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features, including:

[0096] A sub-branch pipe 43, one end of which is connected to the air guide pipe 411, and the other end of which is connected to the top block 420, and an automatic control valve 44 is provided on the sub-branch pipe 43;

[0097] The top block 420 has an air cavity 425 in communication with the sub-pipe 43 and the plurality of circular holes 421, and the air cavity 425 has a pressure relief structure 45, while the contour block 422 includes a hemispherical abutment 4220 and a piston portion 4221 slidably connected to the inner wall of the circular hole 421, and an annular groove 4223 with a sealing ring 4222 installed is provided on the surface of the piston portion 4221;

[0098] At the same time, the pressure relief structure 45 on the air cavity 425 of the top block 420 can specifically adopt a pressure relief port and a solenoid valve installed on the pressure relief port, and the pressure is relieved by opening the solenoid valve.

[0099] It can be seen from this embodiment that by opening the air cavity 425 in the sub-branch 43 and the top block 420 that is connected to the circular hole 421, the profiling block 422 can be locked by air pressure, effectively preventing the profiling block 422 from moving and affecting the fit between the rear chuck 4 and the pipe fitting, further ensuring the stability of the pipe rotation;

[0100] The hemispherical abutment joint can effectively ensure the abutment against the surface of the pipe, and the piston part 4221 and the annular groove 4223 and the sealing ring 4222 on the surface of the piston part 4221 can achieve a sealing effect to avoid leakage when the air pressure is introduced for pressure-maintaining locking, thereby effectively ensuring the reliability of locking the profiling block 422.

[0101] Embodiment 6:

[0102] This embodiment provides a pipe cutting machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features, and the automatic control valve 44 includes:

[0103] The valve body 440 has an air inlet 441 and an air outlet 442 at both ends respectively connected to the sub-branch pipe 43;

[0104] The valve core 443 is slidably connected in the valve body 440 and is used for opening and closing the valve body 440;

[0105] The second spring 444 is installed in the valve body 440, and two ends thereof are respectively in contact with the valve core 443 and the inner wall of the valve body 440;

[0106] The force that causes the second spring 444 to be compressed to push open the valve core 443 is greater than the force of the cylinder 410 opening and the force of the first spring 423 being compressed.

[0107] It can be seen from this embodiment that by adopting the self-control valve 44, after the cylinder 410 pushes the profiling component to perform profiling and clamping, the profiling block 422 is locked, which effectively ensures the self-control effect, and does not require the action of an additional power source. The profiling block 422 can be locked by using the power source of the cylinder 410, which effectively reduces energy consumption and achieves a good energy-saving effect.

[0108] The force that compresses the second spring 444 to push open the valve core 443 must be greater than the force that opens the cylinder 410 and the force that compresses the first spring 423. That is to say, the second spring 444 is pushed open only after the cylinder 410 pushes the push block 420 to clamp the pipe and causes the profiling block 422 to fit the surface of the pipe, thereby locking the profiling block 422, avoiding the effect of the profiling block 422 fitting the pipe surface due to locking the profiling block 422 in advance, and avoiding the profiling block 422 from losing its function.

[0109] Embodiment 7:

[0110] This embodiment provides a pipe cutting machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features, including:

[0111] A plurality of feeding mechanisms 5 are provided on the side of the frame 1 along the sliding direction of the front chuck 3 and are used for lifting and lowering the pipe fittings and pushing them to one side of the frame 1;

[0112] The length dimension of the feeding mechanism 5 along the sliding direction of the front chuck 3 is greater than the length dimension of the front chuck 3 along its sliding direction.

[0113] It can be seen from the present embodiment that by adopting a plurality of feeding mechanisms 5, and the length dimension of the feeding mechanisms 5 along the sliding direction of the front chuck 3 is greater than the length dimension of the front chuck 3 along its sliding direction, that is to say, the plurality of feeding mechanisms 5 can be moved out in sequence with the sliding of the front chuck 3, that is, before and after the front chuck 3 clamps the pipe diameter, there are feeding mechanisms 5 to support the pipe, so as to prevent the pipe from sagging and bending in the middle part between the front chuck 3 and the rear chuck 4, thereby effectively ensuring the quality of the incision when cutting the pipe and ensuring the product quality of the pipe.

[0114] Embodiment 8:

[0115] This embodiment provides a pipe cutting machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features. The feeding mechanism 5 includes:

[0116] A base 50 is mounted on the side of the frame 1;

[0117] A bracket 51 is horizontally slidably connected to the base 50;

[0118] A support seat 52 is vertically slidably connected to the bracket 51 and is used to place and support the pipe;

[0119] The driving assembly includes a first driving member installed on the base 50 for driving the bracket 51 to move horizontally and a second driving member installed on the bracket 51 for driving the support base 52 to move up and down;

[0120] The first driving member and the second driving member can both adopt a cylinder 410 or a screw drive device, both of which are existing mature technologies. They are not shown in the drawings of this application, but those skilled in the art can know the installation positions of the first driving member and the second driving member, which will not be described here in detail.

[0121] At the same time, a slot adapted to the pipe fitting is provided on the support seat 52, that is, different slot shapes can be adopted according to different pipe materials.

[0122] It can be seen from this embodiment that by using the support seat 52 that can slide horizontally and vertically for the feeding mechanism 5, the pipe can be effectively fed and the support seat 52 can be removed, thereby ensuring the convenience of feeding and supporting the pipe.

[0123] In addition, the feeding mechanism 5 is multiple and can be lowered and pulled back, thereby avoiding the movement of the front chuck 3, effectively improving the convenience of feeding the pipe.

[0124] Embodiment 9:

[0125] This embodiment provides a pipe cutting machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features, including:

[0126] The sliding member 6 is mounted on the side of the frame 1, and the rear chuck 4 and the front chuck 3 are both mounted on the sliding member 6 and slidably connected to the frame 1;

[0127] There are multiple rear chucks 4, and the length dimension along the sliding direction of the rear chucks 4 is smaller than the length dimension of the feeding mechanism 5 along the sliding direction of the front chuck 3;

[0128] At the same time, the sliding member 6 can adopt a slide rail and a slider, and the laser cutting head 2 and the frame 1 can also be slidably connected by a slide rail, and the laser cutting head 2, the front chuck 3 and the rear chuck 4 can all be slidably driven by a screw transmission device. This is not shown in the drawings of this application and is an existing mature technology. As a technician in the relevant field can know the installation position of the screw transmission device, it will not be repeated here.

[0129] It can be seen from the present embodiment that by adopting the arrangement of multiple rear chucks 4, that is, with the cooperation of multiple rear chucks 4, the pipe can be axially conveyed. Specifically, after one rear chuck 4 clamps the pipe, another rear chuck 4 approaches the front rear chuck 4, and then the rear rear chuck 4 clamps, and the front rear chuck 4 moves, and this is repeated, so that the pipe can be clamped at different positions and the clamping position can be adjusted. When the pipe is too long, multiple rear chucks 4 can be used to prevent the center of gravity of the pipe from falling between the first and last rear chucks 4, thereby improving the stability of pipe clamping and conveying and improving the convenience of pipe cutting. The feeding mechanism 5 adopts multiple and can be lowered and pulled back, and can also avoid the movement of the rear chuck 4.

[0130] Embodiment 10:

[0131] This embodiment provides a cutting process of a pipe cutting machine, comprising the following steps:

[0132] S1: placing the pipe fitting on the feeding mechanism 5;

[0133] S2: The feeding mechanism 5 drives the pipe to move to the side of the frame 1, and moves the front chuck 3 to clamp one end of the pipe;

[0134] S3: moving the plurality of rear chucks 4 toward the side of the front chuck 3, and during the movement of the rear chucks 4, the feeding mechanisms 5 corresponding to the positions of the plurality of rear chucks 4 are lowered and pulled back horizontally;

[0135] S4: After the rear chuck 4 moves into position, the pipe is clamped by a plurality of cylinders 410, and the profiling mechanism 42 profiles the surface of the pipe;

[0136] S5: The laser cutting head 2 moves to the pipe cutting position;

[0137] S7: The laser cutting head 2 cuts the pipe, and the driving mechanism 31 drives the first clamping mechanism 30 to rotate one circle, and drives the second clamping mechanism 41 and the pipe to rotate one circle, and the cutting is completed;

[0138] S8: The multiple rear chucks 4 cooperate with each other and drive the pipe to move to the front chuck 3, and the front chuck 3 clamps one end of the pipe;

[0139] S9: Repeat S3-S9 until the pipe is cut;

[0140] Wherein, the profiling step of profiling the surface of the pipe fitting in S4 and S5 includes:

[0141] S40: The air supply source supplies air to the air guide tube 411;

[0142] S41: Under the action of the second spring 444, the airflow enters the cylinder 410 in advance and pushes the cylinder 410 to clamp the pipe;

[0143] S42: the plurality of first springs 423 are compressed, the plurality of profiling blocks 422 are all in close contact with the surface of the pipe fitting, and profiling is completed;

[0144] S43: As the air pressure continues to increase, the second spring 444 is compressed, the valve core 443 is opened, and the air flow enters the air cavity 425 through the sub-branch pipe 43, and the contour block 422 is locked by pressure maintenance.

[0145] It can be seen from the present embodiment that one end of the pipe is clamped and fixed by the front chuck 3, and then clamped by multiple rear chucks 4, which effectively improves the stability of the pipe, and the multiple rear chucks 4 can cooperate with each other to transport the pipe, thereby improving the convenience and accuracy of loading, and during profiling, the air supply source supplies air to the cylinder 410 and then guides the air flow into the air cavity 425 to maintain the pressure, thereby locking the profiling block 422, which can effectively maintain the fit between the profiling mechanism 42 and the pipe, improve the stability during pipe cutting, and does not require additional power input, thereby avoiding increased energy consumption.

[0146] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A pipe cutting machine, characterized in that: include: A frame (1) on which a laser cutting head (2) is slidably mounted; The front chuck (3) comprises a first clamping mechanism (30) for clamping and a driving mechanism (31) for driving the first clamping mechanism (30) to rotate, and is slidably connected to the side of the frame (1); The rear chuck (4) comprises a support (40), a second clamping mechanism (41) mounted on the support (40) for clamping, and a contouring mechanism (42) mounted at the output end of the second clamping mechanism (41) for fitting against the surface of the clamped pipe; Wherein, the support (40) is rotatably connected to the frame (1).

2. The pipe cutting machine according to claim 1, characterized in that: The profiling mechanism (42) comprises: The top block (420) is installed at the output end of the second clamping mechanism (41), and has a plurality of circular holes (421) extending through the inside thereof along the clamping direction of the second clamping mechanism (41), and the plurality of circular holes (421) are arranged in a matrix; A plurality of profiling blocks (422) are provided and are respectively slidably connected in the circular holes (421), and one end of each profiling block (420) extends out of the top block; The first spring (423) is installed in the circular hole (421), and its two ends are respectively in contact with the contour block (422) and the output end of the second clamping mechanism (41).

3. The pipe cutting machine according to claim 2, characterized in that: An annular protrusion (424) is provided on the inner wall of the plurality of circular holes (421) for preventing the profiling block (422) from sliding out of the circular hole (421); The first spring (423) is always in a compressed state, and the side of the top block (420) away from the second clamping mechanism (41) is in an arc-shaped surface.

4. The pipe cutting machine according to claim 3, characterized in that: The second clamping mechanism (41) comprises: A plurality of cylinders (410) are provided and are circumferentially mounted on the support (40), and the output ends of the cylinders are all oriented toward the axis of the rear chuck (4); The air guide pipe (411) has one end connected to an air supply source and the other end connected to the cylinder (410) and is used to supply air to the cylinder (410).

5. The pipe cutting machine according to claim 4, characterized in that: Also includes: A sub-branch pipe (43), one end of which is connected to the air guide pipe (411), and the other end of which is connected to the top block (420), and a self-control valve (44) is provided on the sub-branch pipe (43); The top block (420) is provided with an air cavity (425) in communication with the sub-branch pipe (43) and the plurality of circular holes (421), and the air cavity (425) is provided with a pressure relief structure (45), and the contour block (422) includes a hemispherical abutment joint (4220) and a piston portion (4221) slidably connected to the inner wall of the circular hole (421), and an annular groove (4223) with a sealing ring (4222) installed is provided on the surface of the piston portion (4221).

6. The pipe cutting machine according to claim 5, characterized in that: The automatic control valve (44) comprises: The valve body (440) is provided with an air inlet end (441) and an air outlet end (442) at both ends respectively, and is connected to the sub-branch pipe (43); A valve core (443) is slidably connected in the valve body (440) and is used for opening and closing the valve body (440); A second spring (444) is installed in the valve body (440), and two ends thereof are respectively in contact with the valve core (443) and the inner wall of the valve body (440); The force that causes the second spring (444) to be compressed to push open the valve core (443) is greater than the force of the cylinder (410) opening and the force of the first spring (423) being compressed.

7. The pipe cutting machine according to claim 1, characterized in that: Also includes: A plurality of feeding mechanisms (5) are arranged on the side of the frame (1) along the sliding direction of the front chuck (3) and are used for lifting and lowering the pipe fittings and pushing them to one side of the frame (1); The length dimension of the feeding mechanism (5) along the sliding direction of the front chuck (3) is greater than the length dimension of the front chuck (3) along its sliding direction.

8. The pipe cutting machine according to claim 7, characterized in that: The feeding mechanism (5) comprises: A base (50) is mounted on a side of the frame (1); A bracket (51) is horizontally slidably connected to the base (50); A support seat (52) is vertically slidably connected to the bracket (51) and is used to place and support the pipe; The driving assembly comprises a first driving member installed on the base (50) for driving the bracket (51) to move horizontally, and a second driving member installed on the bracket (51) for driving the support seat (52) to move up and down.

9. The pipe cutting machine according to claim 7, characterized in that: Also includes: A sliding member (6) is mounted on the side of the frame (1), and the rear chuck (4) and the front chuck (3) are both mounted on the sliding member (6) and are slidably connected to the frame (1); There are multiple rear chucks (4), and the length dimension along the sliding direction of the rear chuck (4) is smaller than the length dimension of the feeding mechanism (5) along the sliding direction of the front chuck (3).

10. A cutting process applied to the pipe cutting machine according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: placing the pipe fitting on the loading mechanism (5); S2: The feeding mechanism (5) drives the pipe to move to the side of the frame (1), and moves the front chuck (3) to clamp one end of the pipe; S3: moving the plurality of rear chucks (4) toward one side of the front chuck (3), and during the movement of the rear chucks (4), the loading mechanisms (5) corresponding to the positions of the plurality of rear chucks (4) are lowered and pulled back horizontally; S4: After the rear chuck (4) is moved into position, the pipe is clamped by a plurality of cylinders (410), and at the same time, the profiling mechanism (42) profiles the surface of the pipe; S5: The laser cutting head (2) moves to the pipe cutting position; S7: the laser cutting head (2) cuts the pipe, and the driving mechanism (31) drives the first clamping mechanism (30) to rotate one circle, and drives the second clamping mechanism (41) and the pipe to rotate one circle, thereby completing the cutting; S8: The plurality of rear chucks (4) cooperate with each other and drive the pipe fitting to move toward the front chuck (3), and the front chuck (3) clamps one end of the pipe fitting; S9: Repeat S3-S9 until the pipe is cut; Wherein, the profiling step of profiling the surface of the pipe fitting in S4 and S5 includes: S40: The air supply source supplies air to the air guide tube (411); S41: Under the action of the second spring (444), the airflow enters the cylinder (410) in advance and pushes the cylinder (410) to clamp the pipe; S42: the plurality of first springs (423) are compressed, the plurality of profiling blocks (422) are all in close contact with the surface of the pipe fitting, and profiling is completed; S43: As the air pressure continues to increase, the second spring (444) is compressed, the valve core (443) is opened, the air flow enters the air cavity (425) through the sub-branch pipe (43), and the contour block (422) is locked by pressure maintenance.

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