Online cutting device and online automatic pipe cutting method

Abstract

The present invention discloses an online cutting device and an online automatic pipe cutting method. The online cutting device comprises a frame, a clamping device for clamping a pipe, a cutting device for cutting the pipe, a driving device for driving the clamping device to move, and a chain connected between the cutting device and the clamping device. The clamping device is in the initial position and is in close contact with the cutting device. The pipe passes through the cutting device and the clamping device in sequence from the pipe inlet end of the frame and then moves continuously toward the pipe outlet end of the frame. The driving device drives the clamping device to move in the moving direction of the pipe. The clamping device clamps the pipe and drives the cutting device to move synchronously through the chain. The cutting device cuts the pipe during the synchronous movement. The clamping device releases the pipe and drives the cutting device back to the initial position under the action of the driving device. The cutting precision of the present invention is high, and online non-stop cutting can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of cutting equipment, and in particular to an online cutting device and an online automatic pipe cutting method. Background Art

[0002] In the pipe manufacturing process, it is generally necessary to cut the pipe to a certain size. The existing pipe cutting device is difficult to obtain high-precision pipe length in the online cutting of the pipe. Specifically, when the length of the pipe reaches the preset value, the cutting device receives the cutting signal and starts cutting. Since the process from receiving the signal to implementing the cutting action also takes time, and the pipe is always moving, there will be a certain delay in the cutting device, and the actual length of the pipe will be longer than the preset value. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an online cutting device with high cutting accuracy and capable of realizing online non-stop cutting.

[0004] The technical problem that the present invention needs to solve is to provide an online automatic pipe cutting method with high cutting accuracy and capable of achieving online non-stop cutting.

[0005] In order to solve the above technical problems, the present invention provides an online cutting device, including a frame, a clamping device for clamping a pipe, a cutting device for cutting the pipe, a driving device for driving the clamping device to move, and a chain connected between the cutting device and the clamping device, wherein the clamping device is in an initial position and is in close contact with the cutting device, and the pipe passes through the cutting device and the clamping device in sequence from the pipe inlet end of the frame and moves continuously toward the pipe outlet end of the frame; the driving device drives the clamping device to move in the moving direction of the pipe, the clamping device clamps the pipe and drives the cutting device to move synchronously through the chain, the cutting device cuts the pipe during the synchronous movement, the clamping device releases the pipe and drives the cutting device back to the initial position under the action of the driving device.

[0006] As an improvement of the above solution, the cutting device is provided with a gear, the chain is a one-way chain, one end of the chain is connected to the gear, and the other end is connected to the clamping device;

[0007] When the clamping device is in close contact with the cutting device in the initial position, the chain is contracted together;

[0008] When the clamping device and the cutting device move synchronously with the pipe, the chain is in a straight line shape.

[0009] As an improvement of the above solution, the clamping device includes a bracket, a drive telescopic mechanism, a pull rod fixing seat, a left pull rod, a right pull rod, a left clamping block, a right clamping block and a guide rod;

[0010] The driving telescopic mechanism is arranged on the bracket, the telescopic rod of the driving telescopic mechanism is connected to the upper end of the tie rod fixing seat, and the left tie rod and the right tie rod are connected to the lower end of the tie rod fixing seat to form an inverted V-shaped structure;

[0011] The guide rod is arranged on the bracket and passes through the left clamp block and the right clamp block, and the left clamp block and the right clamp block can slide back and forth along the guide rod to form an open and closed state;

[0012] The left pull rod and the right pull rod pass through the left clamp block and the right clamp block respectively, and the driving telescopic mechanism drives the inverted V-shaped structure to move up and down in the vertical direction to drive the left clamp block and the right clamp block to open and close on the guide rod.

[0013] As an improvement of the above solution, the bracket includes a flat plate and two side plates, the flat plate is fixedly connected to the two side plates, the driving telescopic mechanism is fixedly connected to the flat plate, and both ends of the guide rod are fixedly connected to the two side plates respectively.

[0014] As an improvement of the above solution, the inverted V-shaped structure is symmetrical along the vertical direction.

[0015] As an improvement of the above solution, the clamping surfaces of the left clamping block and the right clamping block are both concave V-shaped surfaces.

[0016] As an improvement of the above solution, the clamping surface of the left clamping block and the clamping surface of the right clamping block are provided with engaging structures that are adapted to each other.

[0017] As an improvement of the above solution, the left clamp block and the right clamp block are both provided with sliding bearings for assisting sliding, and the guide rod passes through the sliding bearings;

[0018] The driving telescopic mechanism is a pneumatic telescopic mechanism.

[0019] Accordingly, the present invention also provides an online automatic pipe cutting method, which uses the above-mentioned online cutting device to cut the pipe, comprising:

[0020] S1, the cutting device and the clamping device are in the initial position, and the pipe passes through the cutting device and the clamping device in sequence from the pipe inlet end of the rack and moves continuously to the pipe outlet end of the rack;

[0021] S2. When the length of the pipe reaches the preset value L1, the clamping device clamps the pipe, and the driving device drives the clamping device to move synchronously with the pipe;

[0022] S3. When the chain is in the shape of a straight line, the clamping device pulls the cutting device to move synchronously through the chain;

[0023] S4. During the synchronous movement, the cutting device cuts off the pipe;

[0024] S5, the clamping device is released, and the driving device drives the clamping device and the cutting device to reset to the initial position, thereby completing one cutting;

[0025] S6. Repeat steps S1 to S5 to achieve online automatic pipe cutting.

[0026] As an improvement of the above solution, the length of the chain is L2, and the cutting length of the pipe is L, wherein L1+L2=L.

[0027] The implementation of the present invention has the following beneficial effects:

[0028] The online cutting device of the present invention clamps the pipe by a clamping device to ensure that the length of the pipe is within a preset value, and then drives the clamping device by a driving device, and drives the cutting device to move synchronously by a chain to ensure that the pipe does not stop and realize online cutting. Most importantly, the chain can ensure the cutting accuracy of the pipe. Since the clamping device has clamped the pipe, the length of the part of the pipe clamped by the clamping device is fixed, and the length of the chain is also fixed, then the total length of the two parts of the pipe added together is the cutting length of the pipe.

[0029] The online cutting device of the present invention works in conjunction with a pipe making machine or similar equipment, and the pipes made by the pipe making machine are directly input into the online cutting device of the present invention for cutting.

[0030] The clamping device of the present invention drives the inverted V-shaped structure to move up and down in the vertical direction by driving the telescopic mechanism to drive the left clamping block and the right clamping block to open and close on the guide rod. It does not require structures such as forward and reverse screw rods and gear racks, and has a simple structure.

[0031] When the inverted V-shaped structure in the clamping device of the present invention moves downward, the gap between the left clamping block and the right clamping block decreases from large to small until the pipe is clamped. Since the inverted V-shaped structure and the guide rod form a triangular structure, self-locking and stable clamping can be achieved after the driving telescopic mechanism is stopped. The clamping force is large, the pipe is not easy to shake or fall off, and the concentricity accuracy is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the online cutting device of the present invention;

[0033] Figure 2 is a three-dimensional schematic diagram of the clamping device of the present invention;

[0034] Figure 3 is a front view of the clamping device of the present invention;

[0035] Figure 4 is a cross-sectional view of the clamping device of the present invention;

[0036] Figure 5This is a three-dimensional schematic diagram of the clamping device of the present invention when the telescopic rod is stretched to the maximum.

[0037] Figure 6 It is a three-dimensional schematic diagram of the middle left clamping block of the clamping device of the present invention;

[0038] Figure 7 It is a three-dimensional schematic diagram of the middle right clamping block of the clamping device of the present invention;

[0039] Figure 8 It is a state diagram of the cutting device and the clamping device of the present invention moving synchronously;

[0040] Fig. 9 is a state diagram of the cutting device of the present invention cutting a pipe;

[0041] Fig.10 It is a state diagram of the cutting device and the clamping device of the present invention being reset to the initial position. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that the directional terms such as up, down, left, right, front, back, inside, outside, etc. that appear or will appear in the text of the present invention are only based on the accompanying drawings of the present invention, and are not specific limitations of the present invention.

[0043] See also Figure 1 and Fig.10 The present invention provides an online cutting device, comprising a frame 1, a clamping device 2 for clamping a pipe 10, a cutting device 3 for cutting the pipe 10, a driving device 4 for driving the clamping device 2 to move, and a chain 5 connected between the cutting device 3 and the clamping device 2, wherein the clamping device 2 is in an initial position and is in close contact with the cutting device 3; the pipe 10 passes through the cutting device 3 and the clamping device 2 in sequence from the pipe inlet end of the frame 1 and then moves continuously toward the pipe outlet end of the frame 1; the driving device 4 drives the clamping device 3 to move in the moving direction of the pipe 10, the clamping device 3 clamps the pipe 10 and drives the cutting device 2 to move synchronously through the chain 5, the cutting device 2 cuts the pipe 10 during the synchronous movement, the clamping device 2 releases the pipe 10 and drives the cutting device 3 back to the initial position under the action of the driving device 4.

[0044] Specifically, the driving device 4 is a cylinder, which is arranged on the frame 1 and connected to the clamping device 2, and is used to drive the clamping device 2 to move toward the pipe outlet or pipe inlet of the frame 1. Preferably, the cylinder is a rodless cylinder.

[0045] The frame 1 is provided with a connecting rod 11 , and the clamping device 2 and the cutting device 3 move along the connecting rod 11 toward the pipe outlet end or the pipe inlet end of the frame 1 .

[0046] The cutting device 3 is provided with a gear 31, and the chain 5 is a one-way chain, one end of the chain 5 is connected to the gear 31, and the other end is connected to the clamping device 2; when the clamping device 2 is in close contact with the cutting device 3 at the initial position, the chain 5 is contracted together; when the clamping device 2 and the cutting device 3 move synchronously with the pipe 10, the chain 5 is in the shape of a straight line.

[0047] The chain 5 is used to limit the length of the pipe 10 and drive the cutting device 3 to move synchronously with the clamping device 2. Because the pipe 10 keeps moving toward the pipe outlet, only when the cutting device 3 moves synchronously with the clamping device 2 and the pipe 10 can the cutting length of the pipe 10 be guaranteed to be a preset value.

[0048] If there is only a cutting device but no clamping device and chain, then when the length of the pipe reaches the preset value, the cutting device receives the cutting signal and starts cutting. Since the process from receiving the signal to implementing the cutting action also takes time, and the pipe is always moving, the cutting device will have a certain delay and the actual length of the pipe will be longer than the preset value.

[0049] The online cutting device of the present invention clamps the pipe 10 through the clamping device 2 to ensure that the length of the pipe 10 is within a preset value, and then drives the clamping device 2 through the driving device 4, and drives the cutting device 3 to move synchronously through the chain 5 to ensure that the pipe 10 does not stop and realize online cutting. Most importantly, the chain 5 can ensure the cutting accuracy of the pipe 10. Since the clamping device 2 has clamped the pipe 10, the length of the part of the pipe 10 clamped by the clamping device 2 is fixed, and the length of the chain 5 is also fixed, then the total length of the two parts of the pipe 10 added together is the cutting length of the pipe 10.

[0050] Specifically, the online cutting device of the present invention works in conjunction with a pipe making machine or similar equipment, and the pipes made by the pipe making machine are directly input into the online cutting device of the present invention for cutting. The cutting device of the present invention can be an existing cutting device, and the present invention does not specifically limit it.

[0051] In order to realize automation, the online cutting device of the present invention also includes a reset induction switch 6 and a protection induction switch 7. The reset induction switch 6 is arranged at the pipe inlet end of the frame 1, and the protection induction switch 7 is arranged at the pipe outlet end of the frame 1. Specifically, after the pipe 10 is cut, the driving device 4 needs to be started to drive the clamping device 2 and the cutting device 3 to reset to the initial position. The function of the reset induction switch 6 is to send a signal to the driving device 4 to start the driving device 4. When the cutting device 3 fails and cannot cut the pipe 10, the pipe 10 moves toward the pipe outlet end of the frame 1. If the length of the pipe 10 is too long, the pipe may bend and cause equipment damage. When the clamping device 2 moves to the position of the protection induction switch 7, the protection induction switch 7 will be used to send a signal to the pipe making machine to stop the pipe making machine. Among them, the reset induction switch 6 and the protection induction switch 7 of the present invention are existing induction switches, and the present invention does not make specific limitations.

[0052] Combination Figure 2 to Figure 7 As shown, the clamping device 2 includes a bracket 21, a driving telescopic mechanism 22, a pull rod fixing seat 23, a left pull rod 24, a right pull rod 25, a left clamp block 26, a right clamp block 27 and a guide rod 28; the driving telescopic mechanism 22 is arranged on the bracket 21, the telescopic rod 21 of the driving telescopic mechanism 22 is connected to the upper end of the pull rod fixing seat 23, and the left pull rod 24 and the right pull rod 25 are connected to the lower end of the pull rod fixing seat 23 to form an inverted V-shaped structure; the guide rod 28 is arranged on the bracket 21 and passes through the left clamp block 26 and the right clamp block 27, and the left clamp block 26 and the right clamp block 27 can slide back and forth along the guide rod 28 to form an open and closed state; the left pull rod 24 and the right pull rod 25 respectively pass through the left clamp block 26 and the right clamp block 27, and the driving telescopic mechanism 22 drives the inverted V-shaped structure to move up and down in the vertical direction to drive the left clamp block and the right clamp block to open and close on the guide rod.

[0053] It should be noted that the driving telescopic mechanism 22 drives the inverted V-shaped structure to move up and down in the vertical direction to drive the left clamping block 26 and the right clamping block 27 to open and close on the guide rod 28, without the need for positive and negative screw rods and gear racks and other structures, and the structure is simple. At the same time, when the inverted V-shaped structure moves downward, the gap between the left clamping block 26 and the right clamping block 27 decreases from large to small until the pipe is clamped. Since the inverted V-shaped structure and the guide rod 28 form a triangular structure, after stopping the driving telescopic mechanism 22, self-locking, stable clamping, strong clamping force, pipes are not easy to shake or fall off, and the concentricity accuracy is high.

[0054] Combination Figure 2 to Figure 5As shown, the bracket 21 includes a flat plate 211 and two side plates 212 , the flat plate 211 is fixedly connected to the two side plates 212 , the driving telescopic mechanism 22 is fixedly connected to the flat plate 211 , and both ends of the guide rod 28 are fixedly connected to the two side plates 212 .

[0055] Furthermore, the inverted V-shaped structure is symmetrical along the vertical direction. If the inverted V-shaped structure is not symmetrical, the telescopic rod 21 of the driving telescopic mechanism 22 will be biased to one side, which may easily cause damage to the driving telescopic mechanism 22.

[0056] Combination Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown, the clamping surfaces of the left clamping block 26 and the right clamping block 27 are both concave V-shaped surfaces to increase the clamping area, prevent the clamped pipe from easily loosening, and further improve the concentricity accuracy.

[0057] Combination Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown, the clamping surfaces of the left clamping block 26 and the right clamping block 27 are provided with mutually adapted engaging structures to increase the friction between the clamping surfaces of the left clamping block 26 and the right clamping block 27, further preventing the clamped pipe from being easily loosened.

[0058] Combination Figure 2 to Figure 7 As shown, in order to increase the smoothness and reliability of the left clamp block 26 and the right clamp block 27 when sliding and reduce the noise generated by sliding, the left clamp block 26 and the right clamp block 27 are both provided with sliding bearings 29 for assisting sliding, and the guide rod 28 passes through the sliding bearings 29.

[0059] Combination Figure 2 to Figure 5 As shown, the driving telescopic mechanism 22 is a pneumatic telescopic mechanism, preferably a cylinder.

[0060] Furthermore, the force-enhancing self-locking concentric synchronous clamp further includes a pneumatic solenoid valve, which is connected to the drive telescopic structure 2 to control the drive telescopic mechanism 22. When the left clamp block 26 and the right clamp block 27 clamp the pipe, the operator can close the air inlet and outlet of the drive telescopic mechanism 22 through the pneumatic solenoid valve, so that the drive telescopic mechanism 22 maintains an extended posture, thereby achieving the left clamp block 26 and the right clamp block 27 to maintain a self-locking posture to clamp the pipe, thereby saving energy.

[0061] In summary, the clamping device 2 of the present invention has a simple structure, is self-locking, has stable clamping, has a strong clamping force, and has high concentricity accuracy.

[0062] Accordingly, the present invention also provides an online automatic pipe cutting method, which uses the above-mentioned online cutting device to cut the pipe, comprising:

[0063] S1, the cutting device and the clamping device are in the initial position, and the pipe passes through the cutting device and the clamping device in sequence from the pipe inlet end of the rack and moves continuously to the pipe outlet end of the rack;

[0064] The initial position refers to the cutting device and the clamping device at the pipe inlet end of the frame.

[0065] Specifically, the online automatic pipe cutting of the present invention works in conjunction with a pipe making machine or similar equipment (not shown in the figure). When the pipe making machine starts to make pipes, the length counting of the pipe making machine starts, and the length of the pipe is calculated by a length counting encoder or a photoelectric switch. It should be noted that the length counting encoder or the photoelectric switch is a structure of the pipe making machine, and the present invention does not limit this.

[0066] At this time, the chain is in a contracted state, the clamping device and the cutting device are completely fitted together, the reset induction switch is in a closed state, and the pipe head enters the clamping device and moves continuously in the direction of the pipe end. At this time, the clamping die of the clamping device is in an open state.

[0067] S2. When the length of the pipe reaches the preset value L1, the clamping device clamps the pipe, and the driving device drives the clamping device to move synchronously with the pipe;

[0068] At this time, the cutting device does not work, and the chain gradually opens as the clamping device moves forward.

[0069] S3. When the chain is in the shape of a straight line, the clamping device pulls the cutting device to move synchronously through the chain, such as Figure 8 As shown;

[0070] In addition, the reset sensor of the cutting device is disconnected, and the clamping device and the cutting device move synchronously with the pipe under the push of the rodless cylinder.

[0071] Specifically, the length of the chain is L2, and the cutting length of the pipe is L, wherein L1+L2=L.

[0072] S4. During the synchronous movement, the cutting device cuts off the pipe. Fig. 9 As shown;

[0073] Specifically, the cut pipe automatically falls onto the workbench.

[0074] S5, the clamping device is released, the reset sensor is activated, and the driving device drives the clamping device and the cutting device to reset to the initial position, thereby completing a cutting operation. Fig.10 As shown;

[0075] S6. Repeat steps S1 to S5 to achieve online automatic pipe cutting.

[0076] The above disclosure is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. An online cutting device, characterized in that: It comprises a frame, a clamping device for clamping the pipe, a cutting device for cutting the pipe, a driving device for driving the clamping device to move, and a chain connected between the cutting device and the clamping device. The clamping device is in an initial position and is in close contact with the cutting device. The pipe passes through the cutting device and the clamping device in sequence from the pipe inlet end of the frame and then moves continuously toward the pipe outlet end of the frame. The driving device drives the clamping device to move in the moving direction of the pipe. The clamping device clamps the pipe and drives the cutting device to move synchronously through the chain. The cutting device cuts the pipe during the synchronous movement. The clamping device releases the pipe and drives the cutting device back to the initial position under the action of the driving device. When the clamping device is in close contact with the cutting device in the initial position, the chain is contracted together; When the clamping device and the cutting device move synchronously with the pipe, the chain is in a straight line shape; The clamping device comprises a bracket, a driving telescopic mechanism, a pull rod fixing seat, a left pull rod, a right pull rod, a left clamping block, a right clamping block and a guide rod; The driving telescopic mechanism is arranged on the bracket, the telescopic rod of the driving telescopic mechanism is connected to the upper end of the tie rod fixing seat, and the left tie rod and the right tie rod are connected to the lower end of the tie rod fixing seat to form an inverted V-shaped structure; The guide rod is arranged on the bracket and passes through the left clamp block and the right clamp block, and the left clamp block and the right clamp block can slide back and forth along the guide rod to form an open and closed state; The left pull rod and the right pull rod pass through the left clamp block and the right clamp block respectively, and the driving telescopic mechanism drives the inverted V-shaped structure to move up and down in the vertical direction to drive the left clamp block and the right clamp block to open and close on the guide rod.

2. The online cutting device according to claim 1, characterized in that: The cutting device is provided with a gear, and the chain is a one-way chain, one end of the chain is connected to the gear, and the other end is connected to the clamping device.

3. The online cutting device according to claim 1, characterized in that: The bracket comprises a flat plate and two side plates, the flat plate is fixedly connected to the two side plates, the driving telescopic mechanism is fixedly connected to the flat plate, and the two ends of the guide rod are respectively fixedly connected to the two side plates.

4. The online cutting device according to claim 1, characterized in that: The inverted V-shaped structure is symmetrical along the vertical direction.

5. The online cutting device according to claim 1, characterized in that: The clamping surfaces of the left clamping block and the right clamping block are both concave V-shaped surfaces.

6. The online cutting device according to claim 5, characterized in that: The clamping surface of the left clamping block and the clamping surface of the right clamping block are provided with engaging structures that are adapted to each other.

7. The online cutting device according to claim 1, characterized in that: The left clamp block and the right clamp block are both provided with sliding bearings for assisting sliding, and the guide rod passes through the sliding bearings; The driving telescopic mechanism is a pneumatic telescopic mechanism.

8. An online automatic pipe cutting method, characterized in that: The online cutting device according to any one of claims 1 to 7 is used to cut the pipe, comprising: S1, the cutting device and the clamping device are in the initial position, and the pipe passes through the cutting device and the clamping device in sequence from the pipe inlet end of the rack and moves continuously to the pipe outlet end of the rack; S2. When the length of the pipe reaches the preset value L1, the clamping device clamps the pipe, and the driving device drives the clamping device to move synchronously with the pipe; S3. When the chain is in the shape of a straight line, the clamping device pulls the cutting device to move synchronously through the chain; S4. During the synchronous movement, the cutting device cuts off the pipe; S5, the clamping device is released, and the driving device drives the clamping device and the cutting device to reset to the initial position, thereby completing one cutting; S6. Repeat steps S1 to S5 to achieve online automatic pipe cutting.

9. The online automatic pipe cutting method according to claim 8, characterized in that: The length of the chain is L2, and the cutting length of the pipe is L, wherein L1+L2=L.

Images