Pipe fitting machining band sawing machine

Abstract

The invention discloses a pipe fitting machining band sawing machine, and belongs to the technical field of band sawing machines. Comprising a sawing machine body which is provided with a right guide head. The deslagging assembly comprises a beam block, two sets of fixing blocks are installed on the beam block, liquid inlet grooves and arc-shaped grooves which are communicated with each other are formed in the fixing blocks, the liquid inlet grooves in the two fixing blocks are communicated through a water way, and liquid outlet holes communicated with the arc-shaped grooves are formed in the fixing blocks; a supporting shaft is rotationally installed on the fixing block, a partition plate is installed on the supporting shaft and slides in the liquid inlet groove, a torsional spring is installed on the supporting shaft, and a plate assembly is connected to the supporting shaft. Saw chips adhered to the surface of a saw blade are pre-cleaned through high-pressure water flow sprayed out of a liquid outlet hole, then residual chips are secondarily scraped in cooperation with a scraper which automatically stretches out along with supplied liquid, the chips are jointly prevented from entering an inner cavity of the right guide head through two cleaning procedures, the abrasion rate of the right guide head is remarkably reduced, meanwhile, the high-temperature saw blade can be synchronously cooled through sprayed water flow, and the service life of the saw blade is prolonged. The saw blade service life is prolonged.

Description

Technical Field

[0001] This invention relates to the field of band saw technology, and more specifically, to a band saw for processing pipe fittings. Background Technology

[0002] Metal pipe fittings are core components in fluid transportation and structural construction, and are widely used in industries such as oil and gas, municipal engineering, and construction. Band saws are the core processing equipment for fixed-length pipe cutting, and their sawing accuracy and operational stability directly determine the processing efficiency and finished product quality of the pipe fittings.

[0003] In existing band saws, a guide head is typically installed to limit and guide the saw blade during operation, preventing blade misalignment and insufficient cutting precision. However, during pipe sawing, a large amount of metal debris is generated. Some of this debris adheres to the saw blade surface and travels synchronously with it, easily being drawn into the gap between the guide head and the saw blade. Long-term accumulation causes rapid wear of the guide head's inner wall, reduced guiding accuracy, and in severe cases, saw blade jamming or breakage. Simultaneously, the continuous friction between the saw blade and the pipe during sawing generates significant heat, accelerating saw blade fatigue and drastically shortening its lifespan. Therefore, we propose a new band saw for pipe processing. Summary of the Invention

[0004] The purpose of this invention is to provide a band saw for pipe processing, which solves the technical problem in the prior art that cutting chips accelerate the wear of the guide head, thereby causing the saw blade to jam and break.

[0005] This invention provides a band saw for pipe processing, including a saw body and a right guide head mounted on the saw body; The slag removal assembly includes a beam block installed on the right guide head, on which two sets of fixing blocks are installed. The fixing blocks are distributed on both sides of the saw blade. The fixing blocks have interconnected liquid inlet grooves and arc grooves. The liquid inlet grooves on the two fixing blocks are connected by a water channel. The fixing blocks have liquid outlet holes that communicate with the arc grooves. A support shaft is rotatably mounted on the fixed block, a partition is mounted on the support shaft, the partition slides in the liquid inlet tank, a torsion spring is mounted on the support shaft, and a plate assembly is connected to the support shaft. The flushing fluid is pumped into the inlet tank, which drives the partition plate to rotate, connecting the separated inlet tank and the arc-shaped tank. The flushing fluid is sprayed onto the saw blade through the outlet hole. The support shaft rotates with the partition plate and drives the plate assembly to contact the saw blade.

[0006] As a further description of the above technical solution, an arc-shaped plate is installed on the support shaft. The arc-shaped plate slides against the inner wall of the arc-shaped groove. An adjustment hole is provided on the arc-shaped plate, and the liquid outlet hole and the arc-shaped groove are connected through the adjustment hole.

[0007] As a further description of the above technical solution, the plate assembly includes a support plate and a scraper. The support plate is mounted on a support shaft, and the scraper is slidably connected to the support plate. An elastic element for pushing the scraper is installed inside the support plate.

[0008] As a further description of the above technical solution, the plate assembly also includes a limiting plate, on which a sleeve is installed. The limiting plate is slidably connected to the support plate through the sleeve. The guide rod of the scraper is slidably engaged with the sleeve. A screw is screwed onto the support plate, and the screw is rotatably connected to the limiting plate.

[0009] As a further description of the above technical solution, the scraper is inclined along the running direction of the saw blade.

[0010] As a further description of the above technical solution, the water passage includes a first water passage opened within the beam block and a second water passage opened on the fixed block, and the liquid inlet tank is connected to the first water passage through the second water passage.

[0011] As a further description of the above technical solution, the arc-shaped groove and the liquid inlet groove are coaxial, and the support shaft is coaxial with the liquid inlet groove.

[0012] As a further description of the above technical solution, the outer diameter of the arc-shaped groove is larger than the outer diameter of the liquid inlet groove.

[0013] As a further description of the above technical solution, a drain hole is provided at the bottom of the arc-shaped groove, and the inner diameter of the drain hole is smaller than the inner diameter of the outlet hole.

[0014] As a further description of the above technical solution, the right guide head is installed on the discharge side of the sawn material.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. This invention first uses high-pressure water jets from the liquid outlet to pre-clean the saw blade surface of the saw chips, and then uses a scraper that automatically extends with the liquid supply to scrape off the remaining chips a second time. The two cleaning processes work together to prevent chips from entering the inner cavity of the right guide head. Compared with the traditional single spray structure, this significantly reduces the wear rate of the right guide head. At the same time, the spray water can simultaneously cool the high-temperature saw blade and extend the service life of the saw blade.

[0016] 2. In the absence of water pressure, the scraper can automatically detach from the saw blade, effectively reducing wear on the saw blade during non-cutting operations. The scraper adapts to the surface of the saw blade through an elastic element and is tilted along the saw blade's running direction, completely avoiding the problem of the scraper jamming the saw blade. At the same time, the clamping pressure of the scraper on the saw blade can be flexibly adjusted by rotating the screw. It can be used with scrapers of different wear levels and saw blades of different specifications and thicknesses. It can also be used by directly adjusting the gap when the scraper is slightly worn, thus extending the scraper's service life.

[0017] 3. The flushing position of the liquid outlet hole of the present invention is set on the front side of the scraper. During operation, part of the water flow can automatically flush the surface of the scraper along with the movement of the saw blade, carrying away the scraped debris, without the need to frequently stop the machine to clean the scraper; at the same time, the right guide head provides support for the saw blade at the contact position of the scraper, avoiding the saw blade from bending due to pressure. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a band saw for pipe processing disclosed in a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the saw blade and right guide hole position of a band saw for pipe processing disclosed in a preferred embodiment of the present invention; Figure 3 This is a partial structural schematic diagram of a band saw for pipe processing disclosed in a preferred embodiment of the present invention; Figure 4 This is a water channel distribution diagram of a band saw for pipe processing disclosed in a preferred embodiment of the present invention; Figure 5 This is a schematic diagram of the liquid outlet position of a band saw for pipe processing disclosed in a preferred embodiment of the present invention; Figure 6 This is a schematic diagram of the fixing block structure of a band saw for pipe processing disclosed in a preferred embodiment of the present invention; Figure 7 This is a schematic diagram of the internal cavity structure of the fixing block of a band saw for pipe processing, as disclosed in a preferred embodiment of the present invention. Figure 8 This is a schematic diagram of the support shaft connection structure of a band saw for pipe processing disclosed in a preferred embodiment of the present invention; Figure 9 This is a schematic diagram of the plate assembly connection structure of a band saw for pipe processing disclosed in a preferred embodiment of the present invention; Figure 10 This is a schematic diagram of the limiting plate connection structure of a band saw for pipe processing, as disclosed in a preferred embodiment of the present invention.

[0019] The following are the labeling instructions in the diagram: 1. Sawing machine body; 2. Right guide head; 3. Saw blade; 4. Slag removal assembly; 41. Beam block; 42. Fixing block; 43. First water channel; 44. Water inlet; 45. Liquid inlet groove; 46. Arc groove; 47. Liquid outlet; 48. Limiting groove; 49. Second water channel; 410. Drain hole; 5. Support shaft; 51. Partition plate; 52. Arc plate; 53. Adjustment hole; 6. Torsion spring; 7. Plate assembly; 71. Support plate; 72. Scraper; 73. Guide rod; 74. Guide block; 75. Guide groove; 76. Elastic element; 77. Limiting plate; 78. Sleeve; 79. Screw. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Reference Figures 1 to 10 A band saw for pipe fitting processing includes a saw body 1, a right guide head 2 installed on the saw body 1, the right guide head 2 is installed on the discharge side of the sawed material and is used to guide the running saw blade 3, and a slag removal component 4 is installed on the right guide head 2.

[0022] Reference Figures 2 to 6 The slag removal component 4 includes a beam block 41, which is fixedly installed on the right guide head 2. Two sets of fixing blocks 42 are fixedly installed on the beam block 41, and the two fixing blocks 42 are distributed on both sides of the saw blade 3. A first water channel 43 is opened inside the beam block 41, and a water inlet 44 communicating with the first water channel 43 is opened on the beam block 41. A liquid inlet groove 45 is opened on the fixing block 42, and an arc-shaped groove 46 communicating with the liquid inlet groove 45 is opened on the fixing block 42. The arc-shaped groove 46 and the liquid inlet groove 45 are only connected on one side, and the arc-shaped groove 46 and the liquid inlet groove 45 are coaxial. The outer diameter of the arc-shaped groove 46 is larger than the outer diameter of the liquid inlet groove 45. The fixing block 42 is provided with several liquid outlet holes 47 that communicate with the arc-shaped groove 46. The liquid outlet holes 47 have a certain angle with the running saw blade 3, so that the liquid sprayed from the liquid outlet holes 47 can spray onto the saw blade 3, thereby washing away the debris adhering to the surface of the saw blade 3, preventing the debris from entering the right guide head 2, reducing the wear of the right guide head 2 by the debris. At the same time, the liquid sprayed on the surface of the saw blade 3 can also cool down the saw blade 3 after sawing, extending the service life of the saw blade 3.

[0023] A limiting groove 48 is provided on the fixed block 42, and a second water passage 49 is provided on the fixed block 42. The liquid inlet 45 and the first water passage 43 are connected through the second water passage 49, thereby connecting the water passages of the two fixed blocks 42. The rinsing fluid is input from the water inlet 44, and after being diverted by the water passage, it enters the liquid inlet 45 of the two fixed blocks 42 respectively, thereby achieving synchronous liquid supply. A drain hole 410 is provided at the bottom of the arc-shaped groove 46. The diameter of the drain hole 410 is smaller than that of the outlet hole 47, which is used to drain the liquid accumulated in the arc-shaped groove 46 when the saw is not working, reducing the erosion of the liquid on the inner cavity of the fixed block 42.

[0024] Reference Figure 3 , Figure 5 , Figure 7 and Figure 8A support shaft 5 is rotatably mounted on the fixed block 42. The support shaft 5 is coaxial with the liquid inlet 45. A partition 51 is fixedly mounted on the support shaft 5. The partition 51 slides in the liquid inlet 45, thereby separating the liquid inlet 45 from the arc-shaped groove 46. After the flushing liquid enters the liquid inlet 45, it cannot flow directly into the arc-shaped groove 46 because the liquid inlet 45 and the arc-shaped groove 46 are separated by the partition 51. This increases the hydraulic pressure in the liquid inlet 45, thereby pushing the partition 51 to move towards the arc-shaped groove 46. When the partition 51 moves from the area of ​​the liquid inlet 45 to the area of ​​the arc-shaped groove 46, the flushing liquid can flow into the arc-shaped groove 46 through the liquid inlet 45.

[0025] An arc-shaped plate 52 is fixedly installed on the support shaft 5. The arc-shaped plate 52 can block the liquid outlet 47, thereby separating the liquid outlet 47 and the arc-shaped groove 46. When the band saw or flushing fluid is not in operation, it can effectively prevent debris from entering the cavity of the fixed block 42 from the liquid outlet 47, thus ensuring that the arc-shaped plate 52 and the partition plate 51 can rotate smoothly. The outer diameter of the arc-shaped plate 52 is equal to the inner diameter of the arc-shaped groove 46. The arc-shaped plate 52 slides against the inner wall of the arc-shaped groove 46. An adjustment hole 53 is provided on the arc-shaped plate 52. The inner diameter of the adjustment hole 53 is smaller than the inner diameter of the liquid outlet 47. The liquid outlet 47 and the arc-shaped groove 46 are connected through the adjustment hole 53.

[0026] Reference Figure 5 The support shaft 5 extends through the fixing block 42, and a torsion spring 6 is fitted on the support shaft 5. One end of the torsion spring 6 is fixedly connected to the support shaft 5, and the other end is fixedly connected to the fixing block 42. When there is no flushing fluid pressure, the support shaft 5 is driven by the elastic force of the torsion spring 6 to rotate the partition 51 into the liquid inlet 45 until the partition 51 moves to the end of the limiting groove 48 and stops. At this time, the adjusting hole 53 is not connected to the liquid outlet 47, and the arc plate 52 blocks the liquid outlet 47; the drain hole 410 is in an open state, and the accumulated liquid in the arc groove 46 can be discharged through the drain hole 410. When the flushing fluid enters the inlet tank 45 and pushes the baffle 51 to rotate into the arc-shaped groove 46, the support shaft 5 drives the arc-shaped plate 52 to rotate. The arc-shaped plate 52 first blocks the drain hole 410, and then the adjusting hole 53 gradually connects with the outlet hole 47, compressing the torsion spring 6. When the baffle 51 rotates to the connection between the inlet tank 45 and the arc-shaped groove 46, three-quarters of the area of ​​the adjusting hole 53 is connected to the outlet hole 47. When the water pressure drives the baffle 51 to continue rotating, the adjusting hole 53 can be fully connected to the outlet hole 47. It should be noted that the adjusting hole 53 can be made into an oblong shape, so that when the arc-shaped plate 52 rotates a large range, it can maintain continuous communication with the outlet hole 47.

[0027] Reference Figure 3 , Figure 5 , Figures 7 to 10A plate assembly 7 is connected to the support shaft 5. When the flushing fluid fails to remove the debris from the saw blade 3, the plate assembly 7 contacts the saw blade 3 to further clean the debris adhering to the saw blade 3. The plate assembly 7 includes a support plate 71 and a scraper 72. The support plate 71 is fixedly connected to the support shaft 5. A guide rod 73 is fixedly installed on the scraper 72. A guide block 74 is fixedly installed at the end of the guide rod 73. A guide groove 75 is opened on the support plate 71. The scraper 72 slides on the support plate 71 through the sliding cooperation between the guide block 74 and the guide groove 75. An elastic element 76 is fitted inside the guide groove 75. One end of the elastic element 76 is fixedly connected to the support plate 71, and the other end is connected to the guide block 74, which is used to push the guide block 74 to move outward of the guide groove 75. When the support shaft 5 rotates, the support plate 71 and the scraper 72 rotate accordingly, and the scraper 72 can fit against the surface of the saw blade 3, thereby cleaning the residual debris on the surface of the saw blade 3 and further reducing the risk of debris entering the right guide head 2.

[0028] It should be noted that the support plate 71 and scraper 72 are at a certain angle when they are attached to the saw blade 3, and the scraper 72 is tilted along the running direction of the saw blade 3. With the help of the elastic element 76, the scraper 72 can be effectively prevented from getting stuck on the saw blade 3, reducing the risk of damage to the saw blade 3. Moreover, the contact position between the scraper 72 and the saw blade 3 is on the front side of the right guide head 2. The right guide head 2 can effectively guide and support the saw blade 3, preventing the saw blade 3 from bending when the scraper 72 is attached to the saw blade 3.

[0029] The flushing fluid sprayed from the outlet hole 47 is located on the saw blade 3 on the front side of the scraper 72. The flushing fluid will wash the surface of the scraper 72 under the action of the saw blade 3, thereby washing away the debris retained on the scraper 72 and reducing the risk of debris accumulating on the scraper 72.

[0030] The plate assembly 7 also includes a limiting plate 77, on which a sleeve 78 is fixedly installed. The limiting plate 77 slides with the support plate 71 through the sleeve 78 and the guide groove 75. The guide rod 73 slides with the sleeve 78. A screw 79 is threadedly connected to the support plate 71, and the screw 79 is rotatably connected to the limiting plate 77. When the scraper 72 wears down after long-term use, or when the pushing force of the scraper 72 on the saw blade 3 is too large, the position of the sleeve 78 in the guide groove 75 can be adjusted by rotating the screw 79. The guide block 74 moves with the sleeve 78 and drives the scraper 72 to move, thereby adjusting the distance between the scraper 72 and the support plate 71, and adjusting the contact pressure between the scraper 72 and the saw blade 3.

[0031] Working principle When the band saw is not started and there is no flushing fluid supply, the support shaft 5 is reset by the elastic force of the torsion spring 6, which drives the partition 51 to rotate into the liquid inlet 45 until the partition 51 is stuck into the end of the limiting groove 48. At this time, the arc plate 52 completely blocks all the liquid outlet holes 47, and the sawing debris from the outside cannot flow back into the inner cavity of the fixed block 42 from the liquid outlet holes 47, thus avoiding jamming of the internal moving parts. At the same time, the drain hole 410 at the bottom of the arc groove 46 is in a fully open state, and the residual liquid from the last operation can be discharged naturally through the drain hole 410, reducing the risk of liquid corrosion to the inside of the fixed block 42.

[0032] When the saw is started and the flushing fluid is pumped in from the inlet 44, the water first enters the first water channel 43 of the beam block 41, and then flows synchronously into the inlet tank 45 of the two fixed blocks 42 through the second water channel 49 of the two fixed blocks 42. At this time, the partition 51 separates the inlet tank 45 from the arc-shaped tank 46, and the water cannot flow into the arc-shaped tank 46. The water pressure in the inlet tank 45 continues to rise, pushing the partition 51 to rotate towards the arc-shaped tank 46. The support shaft 5 rotates synchronously against the spring force of the torsion spring 6. First, the arc-shaped plate 52 rotates to block the drain hole 410, preventing the subsequent high-pressure water from leaking and depressurizing from the drain hole 410. As the support shaft 5 continues to rotate, the adjustment hole 53 on the arc-shaped plate 52 gradually aligns and connects with the outlet hole 47, and the water sprays out from the outlet hole 47.

[0033] When the partition 51 rotates to the connection point between the liquid inlet 45 and the arc-shaped groove 46, the adjusting hole 53 and the liquid outlet 47 are connected. As the water pressure continues to push the partition 51 to rotate, the connecting area between the adjusting hole 53 and the liquid outlet 47 continues to increase until they are fully connected. The high-pressure flushing fluid is sprayed onto the surface of the saw blade 3 at a preset angle, which not only washes away the sawing debris adhering to the surface of the saw blade 3, preventing the debris from entering the right guide head 2 and causing wear, but also cools down the saw blade 3, which is hot after the sawing operation, and extends the service life of the saw blade 3. At the same time, the support shaft 5 synchronously... The drive plate assembly 7 rotates to the working position and fits against the surface of the saw blade 3. The contact position is located in front of the right guide head 2. The right guide head 2 supports the saw blade 3 to prevent it from bending under pressure. The scraper 72 is set at an angle along the running direction of the saw blade 3 to scrape off the remaining debris after rinsing, further reducing the risk of debris entering the right guide head 2. In addition, the rinsing liquid sprayed from the liquid outlet 47 is located in front of the scraper 72. Some of the water flow flows with the saw blade 3 to wash the surface of the scraper 72, which can automatically remove the debris stuck on the scraper 72 and prevent debris accumulation.

[0034] When the saw stops operating or the flushing fluid supply stops, the water pressure in the inlet tank 45 disappears, and the torsion spring 6 releases its elastic force to drive the support shaft 5 to rotate in the opposite direction and reset. First, the arc plate 52 disconnects the connection between the adjustment hole 53 and the outlet hole 47 and re-seals the outlet hole 47. After the support shaft 5 continues to rotate, the arc plate 52 releases the seal on the drain hole 410, and the residual liquid in the arc groove 46 is discharged through the drain hole 410. Finally, the partition plate 51 resets and is locked into the limit groove 48, and the plate assembly 7 rotates synchronously to disengage from the saw blade 3 and returns to the standby state.

[0035] When the scraper 72 wears out after long-term use, or when the pushing force of the scraper 72 on the saw blade 3 is too large, the screw 79 on the support plate 71 can be rotated to drive the limiting plate 77 and the sleeve 78 to slide along the guide groove 75, thereby driving the guide block 74, guide rod 73 and scraper 72 to move synchronously. By adjusting the distance between the scraper 72 and the support plate 71, the contact pressure between the scraper 72 and the saw blade 3 can be flexibly adjusted to adapt to different working conditions.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A band saw for processing pipe fittings, characterized in that: Includes a saw body (1), on which a right guide head (2) is installed; The slag removal assembly (4) includes a beam block (41) installed on the right guide head (2). Two sets of fixing blocks (42) are installed on the beam block (41). The fixing blocks (42) are distributed on both sides of the saw blade (3). The fixing blocks (42) have interconnected liquid inlet grooves (45) and arc grooves (46). The liquid inlet grooves (45) on the two fixing blocks (42) are connected by a water channel. The fixing blocks (42) have liquid outlet holes (47) that communicate with the arc grooves (46). A support shaft (5) is rotatably mounted on the fixed block (42), a partition (51) is mounted on the support shaft (5), the partition (51) slides in the liquid inlet tank (45), a torsion spring (6) is mounted on the support shaft (5), and a plate assembly (7) is connected to the support shaft (5). The flushing fluid is pumped into the inlet tank (45), which pushes the partition (51) to rotate, so that the separated inlet tank (45) and the arc-shaped groove (46) are connected. The flushing fluid is sprayed out through the outlet hole (47) and flushes the saw blade (3). The support shaft (5) rotates with the partition (51) and drives the plate assembly (7) to abut against the saw blade (3) to clean the saw blade (3) again.

2. The band saw for pipe fitting processing according to claim 1, characterized in that: An arc plate (52) is installed on the support shaft (5). The arc plate (52) slides against the inner wall of the arc groove (46). An adjustment hole (53) is provided on the arc plate (52). The liquid outlet (47) and the arc groove (46) are connected through the adjustment hole (53).

3. The band saw for pipe fitting processing according to claim 1, characterized in that: The plate assembly (7) includes a support plate (71) and a scraper (72). The support plate (71) is mounted on a support shaft (5), and the scraper (72) is slidably connected to the support plate (71). An elastic element (76) for pushing the scraper (72) is installed inside the support plate (71).

4. The band saw for pipe fitting processing according to claim 3, characterized in that: The plate assembly (7) also includes a limiting plate (77), on which a sleeve (78) is installed. The limiting plate (77) is slidably connected to the support plate (71) through the sleeve (78). The guide rod (73) of the scraper (72) is slidably engaged with the sleeve (78). A screw (79) is screwed onto the support plate (71), and the screw (79) is rotatably connected to the limiting plate (77).

5. The band saw for pipe fitting processing according to claim 3, characterized in that: The scraper (72) is inclined along the running direction of the saw blade (3).

6. The band saw for pipe fitting processing according to claim 1, characterized in that: The water passage includes a first water passage (43) opened in the beam block (41) and a second water passage (49) opened on the fixed block (42). The liquid inlet tank (45) is connected to the first water passage (43) through the second water passage (49).

7. The band saw for pipe fitting processing according to claim 1, characterized in that: The arc-shaped groove (46) and the liquid inlet groove (45) are coaxial, and the support shaft (5) is coaxial with the liquid inlet groove (45).

8. The band saw for pipe fitting processing according to claim 1, characterized in that: The outer diameter of the arc-shaped groove (46) is larger than the outer diameter of the liquid inlet groove (45).

9. The band saw for pipe fitting processing according to any one of claims 1-8, characterized in that: The bottom of the arc-shaped groove (46) is provided with a drain hole (410), the inner diameter of which is smaller than the inner diameter of the outlet hole (47).

10. The band saw for pipe fitting processing according to any one of claims 1-8, characterized in that: The right guide head (2) is installed on the discharge side of the sawn material.

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