Pipeline cutting device

Abstract

The utility model discloses a pipeline cutting device which comprises a workbench, a feeding mechanism, a cutting mechanism, a dust collecting mechanism and a measuring mechanism, the feeding mechanism, the cutting mechanism, the dust collecting mechanism and the measuring mechanism are installed on the workbench, a first pipe clamping assembly is arranged between the feeding mechanism and the cutting mechanism, and a second pipe clamping assembly is arranged between the cutting mechanism and the measuring mechanism. The dust collection mechanism comprises a dust suction hood, a filter and a negative pressure fan, the dust suction hood is hollow, the middle of the dust suction hood is of an organ type telescopic structure, one end of the dust suction hood is connected with the cutting mechanism, the other end of the dust suction hood is connected with the filter, and the filter is connected with the negative pressure fan; the measuring mechanism comprises a linear motor module, an absolute value encoder and a collision block, the collision block is installed on a rotor of the linear motor module, one end of the pipe abuts against the collision block during cutting, and the absolute value encoder is used for measuring the movement amount of the collision block. According to the utility model, the absolute value encoder of the measuring mechanism is used for firstly measuring and then cutting a final finished product, so that the accuracy of the length size of a blanking part can be ensured.

Description

Technical Field

[0001] This utility model relates to the field of pipe processing technology, and in particular to a pipe cutting device. Background Technology

[0002] The explosive demand for silicon carbide chips has led to a rapid increase in the installation of silicon carbide crystal growth and epitaxial growth equipment. The production processes in these equipment require the use of various ultra-high purity specialty gases. The plant's gas supply system and the equipment's gas mixing system contain numerous gas path control panels. These control panels often need to integrate a large number and variety of valves and sensors within a limited area. Because these valves and sensors are located very close together, a network of specialty gas pipelines is required for connection. If the manufacturing precision of these pipelines is low, accumulated errors can lead to problems such as valve misalignment, valve failure to connect, gas leaks at connection points, and low connection reliability. Since many specialty gases are toxic, flammable, and explosive, leaks can cause serious damage to personnel and property.

[0003] Currently, the manufacturing method for specialty gas pipelines involves cutting pipes into sections and then welding VCR connectors or elbows to both ends. VCR connectors and elbows are standard products with dimensional accuracy down to 0.01mm, ensuring extremely high consistency across batches. The shrinkage of the weld seam can be guaranteed to be consistent across each weld through process uniformity. Therefore, the main error affecting the length accuracy of specialty gas pipelines originates from the pipe cutting stage. The current method for cutting specialty gas pipelines is as follows: measuring the length with a tape measure – marking the lines – cutting using a manual pipe cutting tool. Because the manual cutting tool uses a blade-pressing, rotating method, there will be necking at the pipe end. A pipe end leveling machine is then used to level the end, followed by a vernier caliper to verify the cut pipe length, and finally, the pipe end leveling machine is used to adjust the cut pipe to the required length.

[0004] However, existing material cutting methods suffer from poor accuracy due to manual marking, time-consuming and inconvenient manual cutting tools, and poor feed accuracy of pipe end mills, making it difficult to guarantee the length of the cut pipe to within 0.2mm. This necessitates multiple checks and adjustments to dimensions, resulting in a long cutting time for each pipe. The entire material cutting process is cumbersome and inefficient. Furthermore, ensuring dimensional uniformity for materials of the same specification is extremely difficult, which is highly detrimental to mass production. In addition, the pipe end mill is a handheld pistol drill-like device that generates metal dust particles during pipe end milling operations. Even with a dedicated dust collection device, the dust collection effect is poor, and it also affects operation. The metal dust particles that drift into the cleanroom will accelerate the depletion of cleanroom consumables and shorten the cleanroom maintenance cycle. Utility Model Content

[0005] Purpose of the invention: In view of the shortcomings of existing pipe feeding devices, such as low precision, low efficiency and poor dust collection effect, this utility model provides a pipe cutting device.

[0006] Technical solution: To solve the above problems, this utility model adopts a pipe cutting device, including a workbench and a feeding mechanism, a cutting mechanism, a dust collection mechanism, and a measuring mechanism installed on the workbench. A first pipe clamping assembly is provided between the feeding mechanism and the cutting mechanism, and a second pipe clamping assembly is provided between the cutting mechanism and the measuring mechanism. The feeding mechanism is used to transport the pipe to the cutting mechanism, and the cutting mechanism is used to cut the pipe.

[0007] The dust collection mechanism includes a dust collection hood, a filter, and a negative pressure fan. The dust collection hood is hollow inside and has a bellows-style telescopic structure in the middle. One end of the dust collection hood is connected to the cutting mechanism, and the other end of the dust collection hood is connected to the filter. The filter is connected to the negative pressure fan.

[0008] The measuring mechanism includes a linear motor module, an absolute encoder, and a stop block. The stop block is mounted on the mover of the linear motor module. During cutting, one end of the pipe abuts against the stop block. The absolute encoder is used to measure the amount of movement of the stop block.

[0009] Furthermore, the feeding mechanism includes a first linear slide, on which a pipe clamping block is provided.

[0010] Furthermore, the cutting mechanism includes a second linear slide, a cutting motor mounted on the second linear slide, and a saw blade; the saw blade is connected to the output shaft of the cutting motor via a flange, one end of the dust collection hood is fixedly connected to the flange, and the saw blade is housed inside the dust collection hood.

[0011] Furthermore, the first pipe clamping assembly includes a first shim block, a first clamping block, and a first clamping drive device. The first clamping block includes an upper lobe and a lower lobe, which are hinged together and have corresponding grooves on the upper and lower lobes for placing the pipe. The lower lobe is fixedly installed on the top of the first shim block, and one end of the upper lobe is connected to the first clamping drive device. The first clamping drive device controls the first clamping block to clamp or release the pipe.

[0012] Furthermore, the second pipe clamping assembly includes a second shim block, a second clamping block, a second clamping drive device, and a pipe detection sensor. The second clamping block includes an upper lobe and a lower lobe, which are hinged together and have corresponding grooves on the upper and lower lobes for placing pipes. The lower lobe is fixedly installed on the top of the second shim block, and one end of the upper lobe is connected to the second clamping drive device. The second clamping drive device controls the second clamping block to clamp or release the pipe. The pipe detection sensor is used to monitor whether a pipe is placed in the groove.

[0013] Furthermore, limit position switches and deceleration switches are provided at both ends of the linear slide or linear motor stroke of the feeding mechanism, cutting mechanism, and measuring mechanism.

[0014] Furthermore, the effective stroke of the measuring mechanism is greater than or equal to the effective stroke of the feeding mechanism.

[0015] Furthermore, it also includes an operating touch screen and a control cabinet. The operating touch screen is used to input instructions, and the control cabinet is used to control the feeding mechanism, cutting mechanism, dust collection mechanism, and measuring mechanism according to the instructions.

[0016] Furthermore, it also includes an emergency stop button and a second pipe clamping assembly unlocking knob. The emergency stop button is used to stop the operation of each mechanism, and the second pipe clamping assembly unlocking knob is a self-resetting knob used to switch the locked or unlocked state of the second pipe clamping assembly.

[0017] Beneficial effects: Compared with the prior art, the significant advantages of this utility model are (1) the final product is measured and then cut by the absolute encoder of the measuring mechanism, which can ensure the accuracy of the length of the blank; (2) a dust collection mechanism is set at the saw blade cutting end, the dust collection hood covers the saw blade cutting range and can move with the saw blade to ensure the dust collection effect, and the dust collection efficiency is improved by using a large-capacity filter tank, which can reduce the pollution to the clean room, extend the clean room maintenance cycle, extend the life of clean room purification consumables, and save operating costs; (3) the manual extrusion cutting method is changed to saw blade cutting, which avoids the phenomenon of pipe necking, and thus eliminates the flat end operation, greatly reducing the material feeding cycle. Under the premise of ensuring the accuracy and quality of the pipeline, the material feeding time of a single piece is shortened, which greatly improves the production efficiency; (4) through automated feeding, measurement and cutting, not only is the material feeding time of a single piece shortened and the efficiency improved, but the ability requirements of workers are also reduced, which can achieve cost reduction and efficiency improvement. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the pipe cutting device of this utility model;

[0019] Figure 2 This is a schematic diagram of the feeding mechanism of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the first pipe clamping assembly of this utility model;

[0021] Figure 4 This is a schematic diagram of the cutting mechanism and dust collection mechanism of this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the second pipe clamping assembly of this utility model;

[0023] Figure 6 This is a schematic diagram of the measuring mechanism of this utility model. Detailed Implementation

[0024] like Figure 1As shown, a pipe cutting device in this embodiment includes a workbench 1 and a feeding mechanism 2, a cutting mechanism 3, a dust collection mechanism 4, and a measuring mechanism 5 installed on the workbench 1. A first pipe clamping assembly 6 is provided between the feeding mechanism 2 and the cutting mechanism 3, and a second pipe clamping assembly 7 is provided between the cutting mechanism 3 and the measuring mechanism 5.

[0025] The feeding mechanism 2 includes a first linear slide, on which a pipe clamping block 21 is mounted. The first linear slide includes an aluminum profile base, a ball screw 22 mounted on the base, a linear guide rail 23, and a servo motor 24. A slider 25 is mounted on the linear guide rail 23, connected to the ball screw 22. A pipe fixing plate 26 is mounted on the slider 25, and the pipe clamping block 21 is mounted on both the front and rear sides of the pipe fixing plate 26. The pipe clamping block is divided into upper and lower halves, with pipe clamping holes at the interface between the two halves. The lower half is rigidly connected to the fixing plate, and the upper half and lower half are hinged at one end with a pin and bolted at the other end. Tightening the bolts clamps the pipe to be cut between the upper and lower halves. During cutting, the pipe is fixed to the pipe clamping block 21, and the servo motor 24 drives the ball screw 22, which in turn drives the slider and the pipe to move linearly, transporting the pipe to the cutting mechanism for cutting. In this embodiment, the effective stroke of the feeding mechanism is 1500mm. This dimension is not unique and can be customized according to requirements. The linear guide slider of the feeding mechanism moves to its left limit position, with the end closest to the servo motor being the zero position. An limit position switch and a deceleration switch are respectively installed at both ends of the linear guide slider's stroke.

[0026] The first pipe clamping assembly 6 includes a first raising block 61, a first clamping block 62, and a first cylinder 63. The first clamping block 62 includes an upper lobe and a lower lobe, which are hinged together by a pin. The upper and lower lobes have corresponding grooves 621 for placing the pipe. The lower lobe is fixedly mounted on the top of the first raising block 61, and one end of the upper lobe is connected to the first cylinder 63. The first cylinder 63 drives the upper lobe to move, thereby clamping or releasing the pipe using the first clamping block 62. Alternatively, the cylinder can be replaced with an electric cylinder, lead screw, electromagnet, or other linear motion mechanism.

[0027] The cutting mechanism 3 includes a second linear slide, a cutting motor 31 mounted on the second linear slide, and a saw blade 32. The second linear slide has the same structure as the first linear slide, including a base, a servo motor 33, a ball screw 34, a linear guide rail 35, and a slider 36. A cutting fixing plate 37 is mounted on the slider 36, and the cutting motor 31 is mounted on the cutting fixing plate 37. The saw blade 32 is connected to the output shaft of the cutting motor 31 via a flange. The movement direction of the second linear slide is perpendicular to the movement direction of the first linear slide, and the output shaft of the cutting motor 31 is parallel to the movement direction of the first linear slide. The second linear slide drives the cutting motor 31 and the saw blade 32 to move closer to or away from the pipe, and the cutting motor 31 drives the saw blade 32 to rotate for cutting. The slider of the linear guide rail of the cutting mechanism reaches the zero position when it moves to the end closest to the servo motor. An limit position switch and a deceleration switch are respectively provided at both ends of the travel of the slider of the linear guide rail of the cutting mechanism.

[0028] The dust collection mechanism 4 includes a dust collection hood 41, a filter 42, and a negative pressure fan 43. The dust collection hood 41 is hollow inside and has an accordion-style telescopic structure in the middle. One end of the dust collection hood 41 is fixedly connected to the flange on the output shaft of the cutting motor 31; this end is the movable end and can move with the cutting motor. The saw blade 32 is housed inside the dust collection hood 41. The other end of the dust collection hood 41 is the fixed end, connected to the filter 42 through an air extraction pipe. The filter 42 is connected to the negative pressure fan 33. Both the filter 42 and the negative pressure fan 43 are installed on the lower layer of the workbench 1. The negative pressure fan can also be replaced by a cleanroom negative pressure exhaust pipe.

[0029] The second pipe clamping assembly 7 includes a second raising block 71, a second clamping block 72, a second cylinder 73, and a pipe detection sensor 74. The second clamping block 72 includes an upper and a lower lobe, which are hinged together by a pin. The upper and lower lobes have corresponding grooves 721 for placing pipes. The lower lobe is fixedly mounted on the top of the second raising block 71, and one end of the upper lobe is connected to the second cylinder 73. The second cylinder 73 controls the clamping block 72 to clamp or release the pipe. The pipe detection sensor 74 monitors whether a pipe is placed in the groove. The width of the second pipe clamping assembly along the linear guide of the feeding mechanism can be as thin as 3mm, and the gap between the left side limit position of the second cylinder and the milling cutter of the cutting assembly is 1mm.

[0030] The measuring mechanism 5 includes a linear motor module 51, an absolute encoder 52, and a stop block 53, which is mounted on the mover of the linear motor module 51. During cutting, one end of the pipe abuts against the stop block 53, and the absolute encoder 52 measures the movement of the stop block 53. The absolute encoder 52 has an accuracy of 0.5μm, allowing for precise measurement of movement. The effective stroke of the measuring mechanism 5 is greater than or equal to the effective stroke of the feeding mechanism 2. When the mover of the linear motor module 51 moves to the left, the stop block 53 is pressed against the right side of the second cylinder 73; this position is the zero position of the measuring mechanism. An limit position switch and a deceleration switch are respectively installed at both ends of the linear motor stroke of the measuring mechanism. A green indicator light 54 is located near the second cylinder 73 and on the operating side of the worktable. When the indicator light illuminates, it indicates that the pipe to be cut has reached the stop block 53.

[0031] To facilitate automatic control and improve device safety, this device also includes an operation touchscreen 8, a control cabinet 9, an emergency stop button 10, and a second pipe clamping assembly unlocking knob 11. The operation touchscreen 8 is used to input commands, including returning to zero position, length setting, cutting quantity setting, starting cutting, and stopping cutting. The control cabinet 9 is used to control the feeding mechanism 2, cutting mechanism 3, dust collection mechanism 4, and measuring mechanism 5 according to commands. The emergency stop button 10 is located on the worktable and is used to stop the operation of each mechanism. The second pipe clamping assembly unlocking knob 11 is a self-resetting knob used to switch the locked or unlocked state of the second pipe clamping assembly 7. Specifically, rotating the knob 90° releases the clamping operation of the second pipe clamping assembly 7; releasing the knob resets the knob, keeping the second pipe clamping assembly 7 unlocked; the knob has a green indicator light, which illuminates when the knob rotation unlocking function is activated.

[0032] The principle for calculating the pipe cutting length of this utility model is as follows:

[0033] The gap between the saw blade 32 and the second pipe clamping assembly 7 is 'a', and the width of the second pipe clamping assembly 7 along the linear guide rail of the feeding mechanism is 'b'. Then, the minimum pipe cutting length is:

[0034] c = a + b

[0035] If the movement of the measuring mechanism's moving element is d, then the pipe cutting length is:

[0036] e = c + d = a + b + d

[0037] a and b are both fixed values, and d is measured by an absolute encoder. The accuracy of the absolute encoder is the pipe cutting accuracy. The accuracy of the absolute encoder (52) is 0.5μm. Therefore, this device can realize high-precision measurement and control of pipe cutting length.

[0038] The specific operating procedure of this device is as follows: First, control the feeding mechanism 2, cutting mechanism 3, and measuring mechanism 5 to return to the zero position. Place the pipe in the pipe clamping block 21, the first pipe clamping assembly 6, and the second pipe clamping assembly 7, and place one end of the pipe against the impact block 53. Use the pipe clamping block 21 to clamp the pipe. At this time, the impact block of the measuring mechanism will have a movement of 2 micrometers to confirm that the pipe to be cut is clamped in place. Input parameters such as the cutting length and cutting quantity on the operation touch screen 8 to start cutting. The servo motor of the feeding mechanism drives the pipe clamping block to move along the linear guide rail with the pipe, and the end of the pipe against the impact block 53 to move. The movement of the impact block 53 is measured by the linear absolute encoder of the measuring mechanism. When the movement of the impact block is close to the required pipe length setting value, the feeding mechanism will control the moving speed and slowly decelerate until the required cutting length of the pipe is reached. Subsequently, the cylinders of the first pipe clamping assembly 6 and the second pipe clamping assembly 7 drive the clamping blocks, activating the clamping function and clamping the pipe to be cut. The servo motor of the cutting mechanism drives the linear guide slider, carrying the cutting motor 31 and saw blade 32, to cut the pipe to be cut. The slider moves to the limit position to cut, and after cutting, the cutting mechanism automatically returns to the zero position. At this time, the unlocking knob switch of the second pipe clamping assembly 7 lights up green, and the knob switch function is activated. After rotating the unlocking knob switch of the second clamping assembly 7 by 90°, it is released, and the knob automatically resets. At this time, the second pipe clamping assembly 7 is released from the clamping state, and the cut pipe can be removed. If multiple pipes of the same length are to be cut, the pipe detection sensor installed on the right side of the second pipe clamping assembly 7 will detect them. Once a cut pipe is detected and removed, the next pipe cutting operation will be automatically completed. This cycle repeats until all cutting work is completed.

[0039] This invention uses an absolute encoder in the measuring mechanism to measure the final product before cutting, ensuring the accuracy of the length dimensions of the cut parts. A dust collection mechanism is installed at the saw blade cutting edge, with a dust hood covering the saw blade cutting area and moving with the saw blade to ensure effective dust collection. A large-capacity filter canister is used for dust collection, improving dust collection efficiency, reducing contamination of the cleanroom, extending the cleanroom maintenance cycle, extending the life of cleanroom purification consumables, and saving operating costs. The manual extrusion cutting method is replaced with saw blade cutting, avoiding pipe necking and eliminating flat-end operation, greatly reducing the material feeding cycle. While ensuring pipe accuracy and quality, the material feeding time per piece is shortened, greatly improving production efficiency. Through automated feeding, measurement, and cutting, not only is the material feeding time per piece shortened and efficiency improved, but the skill requirements for workers are also reduced, achieving cost reduction and efficiency improvement.

Claims

1. A pipe cutting device, characterized in that, The utility model provides a cutting device for pipe, including workstation (1) and install on workstation (1) on feeding mechanism (2), cutting mechanism (3), dust collecting mechanism (4), measuring mechanism (5), be equipped with first pipe clamping assembly (6) between feeding mechanism (2) and cutting mechanism (3), be equipped with second pipe clamping assembly (7) between cutting mechanism (3) and measuring mechanism (5);The feeding mechanism (2) is used for conveying pipe to cutting mechanism (3), and the cutting mechanism (3) is used for cutting pipe; The dust collecting mechanism (4) includes a dust suction hood (41), a filter (42), and a negative pressure fan (43). The dust suction hood (41) is hollow inside and has an accordion structure in the middle. One end of the dust suction hood (41) is connected to the cutting mechanism (3), and the other end of the dust suction hood (41) is connected to the filter (42). The filter (42) is connected to the negative pressure fan (43). The measuring mechanism (5) includes a linear motor module (51), an absolute value encoder (52), and a striker (53). The striker (53) is installed on the mover of the linear motor module (51). During cutting, one end of the pipe abuts against the striker (53). The absolute value encoder (52) is used to measure the movement amount of the striker (53).

2. The pipe cutting apparatus of claim 1, wherein, The feeding mechanism (2) includes a first linear sliding table, and a pipe clamping block (21) is arranged on the first linear sliding table.

3. The pipe cutting apparatus of claim 2, wherein, The cutting mechanism (3) includes a second linear sliding table, a cutting motor (31) installed on the second linear sliding table, and a saw blade (32). The saw blade (32) is connected to the output shaft of the cutting motor (31) through a flange. One end of the dust suction hood (41) is fixedly connected to the flange, and the saw blade (32) is accommodated in the dust suction hood (41).

4. The pipe cutting apparatus of claim 3, wherein, The first pipe clamping assembly (6) includes a first heightening block (61), a first clamping block (62), and a first clamping driving device (63). The first clamping block (62) includes an upper half and a lower half. The upper half and the lower half are hinged and have corresponding grooves. The grooves are used to place the pipe. The lower half is fixedly installed on the top of the first heightening block (61). One end of the upper half is connected to the first clamping driving device (63). The first clamping driving device (63) controls the first clamping block (62) to clamp or release the pipe.

5. The pipe cutting apparatus of claim 4, wherein, The second pipe clamping assembly (7) includes a second heightening block (71), a second clamping block (72), a second clamping driving device (73), and a pipe detection sensor (74). The second clamping block (72) includes an upper half and a lower half. The upper half and the lower half are hinged and have corresponding grooves. The grooves are used to place the pipe. The lower half is fixedly installed on the top of the second heightening block (71). One end of the upper half is connected to the second clamping driving device (73). The second clamping driving device (73) controls the second clamping block (72) to clamp or release the pipe. The pipe detection sensor (74) is used to monitor whether the pipe is placed in the groove.

6. The pipe cutting apparatus of claim 3, wherein, The linear sliding table stroke or the linear motor stroke of the feeding mechanism (2), the cutting mechanism (3), and the measuring mechanism (5) is provided with limit position switches and deceleration switches at both ends.

7. The pipe cutting apparatus of claim 1, wherein, The effective stroke of the measuring mechanism (5) is greater than or equal to the effective stroke of the feeding mechanism (2).

8. The pipe cutting apparatus of claim 1, wherein, Further comprising an operation touch screen (8) for inputting instructions and a control cabinet (9) for controlling the feeding mechanism (2), the cutting mechanism (3), the dust collecting mechanism (4) and the measuring mechanism (5) according to the instructions.

9. The pipe cutting apparatus of claim 1, wherein, Further comprising an emergency stop button (10) for stopping the operation of each mechanism and a second pipe clamping assembly unlocking knob (11) which is a self-resetting knob and used for switching the locking or unlocking state of the second pipe clamping assembly (7).

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