Metal pipe cutting device for insulating ladder production

Abstract

The application belongs to the technical field of metal pipe cutting, and particularly relates to a metal pipe cutting device for insulating ladder production, which comprises a cutting table, a first electric telescopic rod is installed on one side of the top end of the cutting table through a mounting frame, an output shaft end of the first electric telescopic rod is provided with a cutting motor, an end of a rotating shaft of the cutting motor is provided with a cutting blade, a plurality of guide rings are fixed on one side of the cutting table, a guide structure is arranged in the guide ring, and a supporting structure is arranged on the side of the top end of the cutting table away from the guide ring; the push rod is pushed into the metal pipe by the air cylinder, the lifting assembly is pushed by the driving top rod of the second electric telescopic rod, four first positioning plates are placed at four corners of the inner wall of the metal pipe, meanwhile, the connecting strip pulls the second positioning plate to be lowered to the inner wall of the metal pipe between the adjacent two first positioning plates, and extrusion deformation of the thin-wall aluminum alloy pipe caused by the radial pressure of the cutting blade during the cutting process can be prevented.

Description

Technical Field

[0001] This invention belongs to the field of metal tube cutting technology, specifically a metal tube cutting device for the production of insulated ladders. Background Technology

[0002] Insulated ladders are commonly used climbing tools in fields such as power construction and high-altitude operations. Their main frame is usually made of aluminum alloy tubes as the supporting skeleton. Aluminum alloy tubes have the advantages of being lightweight, high-strength, and corrosion-resistant, which can meet the dual requirements of insulated ladders for portability and structural strength. In the production process of insulated ladders, aluminum alloy tubes need to be cut into sections of different lengths according to the design dimensions for use in the assembly of ladder frame columns, rungs, and other components.

[0003] In the current process of cutting aluminum alloy tubes, because the insulating ladder needs to be lightweight, the aluminum alloy tubes used are also relatively thin-walled. During the cutting process, the saw blade is prone to causing the cut to deform, which requires subsequent adjustment of the deformed cut to a flat state using tools. It may even cause the cut to be torn in some places, affecting the structural stability of the aluminum alloy tube during use.

[0004] Therefore, the present invention provides a metal tube cutting device for the production of insulated ladders. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides a metal tube cutting device for producing insulated ladders, including a cutting table, a first electric telescopic rod is mounted on one side of the top of the cutting table via a mounting bracket, a cutting motor is mounted on the output shaft end of the first electric telescopic rod, a cutting blade is mounted on the rotating shaft end of the cutting motor, a plurality of guide rings are fixed on one side of the cutting table, a guide structure is provided inside the guide rings, and a support structure is provided on the top of the cutting table away from the guide rings; The guide structure includes a rotating ring rotatably connected inside the guide ring, and the metal tube can pass through the interior of the rotating ring; The support structure includes two sets of first positioning plates disposed on both sides below the cutting blade. Each set of first positioning plates has four plates. During cutting, the four first positioning plates are respectively placed at the four corners inside the metal tube. The cutting blade is placed between the two sets of first positioning plates during cutting. A pushing component is disposed on the side of the first positioning plate away from the guide ring.

[0007] Preferably, the pushing assembly includes a cylinder mounted on the top of the cutting table, a pusher fixed to the end of the cylinder, a reduction motor mounted on the other side of the pusher, a push rod fixed to the end of the shaft of the reduction motor, a connecting block fixed to the other end of the push rod, and two sets of first positioning plates equally spaced outside the connecting block.

[0008] Preferably, a top rod is slidably connected inside the push rod, and a second electric telescopic rod is installed below one end of the push rod. The output shaft end of the second electric telescopic rod is fixedly connected to the top rod. A lifting assembly is provided inside the connecting block to push the first positioning plate to adhere to the inner wall of the metal tube.

[0009] Preferably, the lifting assembly includes two sets of top blocks fixed to the end of the top rod, a push column is slidably connected inside the connecting block, one end of the push column is fixedly connected to the first positioning plate, a second spring is fixedly fixed to the outside of the push column, the other end of the second spring is fixedly connected to the connecting block, and an inclined block is fixed to the other end of the push column. The top block can push the inclined block through the inclined surface.

[0010] Preferably, a second positioning plate is provided between two adjacent first positioning plates, and a connecting strip is rotatably connected to both sides of the second positioning plate, the other end of the connecting strip being rotatably connected to the first positioning plate.

[0011] Preferably, the second positioning plate has a second inclined surface on both sides facing the first positioning plate, and the first positioning plate has a first inclined surface on both sides facing the second positioning plate, and the second inclined surface and the first inclined surface can fit together.

[0012] Preferably, a metal spring is fixed to the inner side of the first positioning plate, and the other end of the metal spring is attached to the bottom of the connecting strip.

[0013] Preferably, a stop is fixed on the side of the cutting table away from the guide ring, which can hold one end of the metal tube against it. Multiple rollers are rotatably connected inside the rotating ring. A rotating shaft is fixed on both sides of each roller. A push block is provided on the other side of the rotating shaft. A telescopic column is fixed on the other side of the push block. The telescopic column is slidably connected inside the rotating ring. A first spring is sleeved on the outside of the telescopic column. One end of the first spring is fixedly connected to the push block, and the other end of the first spring is fixedly connected to the rotating ring. Multiple unidirectional inclined teeth are provided on the adjacent sides of the rotating shaft and the push block. The teeth of the rotating shaft and the teeth of the push block are in opposite directions.

[0014] Preferably, when cutting the metal tube, the metal tube is pushed through the inside of the guide ring, and simultaneously the cylinder is activated to pull the push rod towards the metal tube, so that the metal tube is fitted over the push rod. At this time, the two sets of first positioning plates are located on both sides of the cutting blade. Then, the second electric telescopic rod is activated to push the top rod, which pushes the top block forward. During the movement, the top block pushes the inclined surface of the inclined block, allowing the inclined block to push the push column out from the inside of the connecting block. When the push column extends, it drives the first positioning plates to move outward, and at the same time, all four first positioning plates move simultaneously, pressing against the four corners of the inner wall of the metal tube to support the inner wall of the metal tube. Before the first positioning plates extend, the second positioning plates are stacked outside the first positioning plates. When the push column extends, the connecting strip is pulled, and the connecting strip pulls the second positioning plates downward. When the first positioning plates on both sides of the second positioning plate are fully extended, the connecting strip pulls the second positioning plate between two adjacent first positioning plates. At this time, the second positioning plate is also attached to the inner wall of the metal tube, supporting the metal tube. At the same time, the second inclined surface and the first inclined surface are attached together, so that the first positioning plate supports the second positioning plate. Then, the cutting motor is started to drive the cutting blade to rotate. At the same time, the first electric telescopic rod is started to drive the cutting motor to move downward as a whole. The cutting blade cuts the outside of the metal tube. During the cutting process, the reduction motor drives the push rod to rotate. The push rod drives the first positioning plate to rotate, so that the metal tube can rotate during the cutting process, so that the cutting blade cuts the metal tube in a circumferential direction. After the cutting is completed, the second electric telescopic rod is started to pull the top rod to reset. The top rod pulls the top block away from the inclined block. At this time, the second spring force pushes the inclined block to move towards the middle of the connecting block, so that the first positioning plate is away from the inner wall of the metal tube. At the same time, the spring force of the metal spring pushes the connecting strip. The connecting strip is subjected to force and lifts the second positioning plate upward. When the first positioning plate is reset, the second positioning plate is stacked again on the outside of the first positioning plate.

[0015] Preferably, when cutting the metal tube, the metal tube is pushed through the inside of the rotating ring. At this time, the metal tube drives the roller to roll forward, and the roller supports the outside of the metal tube. The rotating shaft rotates in the direction of the inclined surface of the push block teeth, so that the push block is pushed towards the direction of the telescopic column to squeeze the first spring. When the end of the metal tube touches the stop, the pushing of the metal tube stops. At this time, the elastic force of the first spring pushes the push block to engage with the rotating shaft, so that the roller is fixed. After the cutting is completed, the cylinder pushes the push rod and the first positioning plate to be pulled out from the inside of the metal tube, and the cut metal tube is dropped from the opening at the top of the cutting table.

[0016] The beneficial effects of this invention are as follows: 1. The metal tube cutting device for producing insulated ladders according to the present invention uses a cylinder to push a push rod into the interior of the metal tube, and then a second electric telescopic rod drives a top rod to push a lifting assembly, so that four sets of first positioning plates extend outward from the connecting block and press against the four corners of the inner wall of the metal tube respectively. At the same time, the connecting strip pulls the second positioning plate down to fit between two adjacent sets of first positioning plates against the inner wall of the metal tube. The cooperation of the first and second inclined surfaces makes the first positioning plate support the second positioning plate, thereby providing all-round support for the inner wall of the metal tube on both sides of the cutting position. This can prevent the thin-walled aluminum alloy tube from being squeezed and deformed by the radial pressure of the cutting blade during the cutting process, and ensure the roundness of the tube opening and the cutting quality.

[0017] 2. The metal tube cutting device for producing insulated ladders according to the present invention has multiple rollers on a rotating ring inside the guide ring. The rollers roll freely when the metal tube is pushed in through the one-way toothed engagement between the rotating shaft and the push block and the elastic force of the first spring. After being pushed in, they are automatically locked and fixed. During cutting, the reduction motor drives the push rod to rotate the internal support assembly as a whole, so that the metal tube rotates at a uniform speed under the cutting blade, realizing continuous circumferential cutting without the need for manual rotation of the tube. The cut surface is flat and the efficiency is high. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the metal tube cutting process according to the present invention; Figure 2 This is a schematic diagram of the metal tube of the present invention before it is cut; Figure 3 This is a schematic diagram of the internal structure of the guide ring in this invention; Figure 4 This is a schematic diagram of the rotating shaft structure in this invention; Figure 5 This is a schematic diagram of the internal structure of the push rod in this invention; Figure 6 This is a schematic diagram of the connecting block structure in this invention; Figure 7 This is a schematic diagram of the push rod structure in this invention; Figure 8 This is a schematic diagram of the first positioning plate structure in this invention.

[0020] In the diagram: 1. Cutting table; 11. Guide ring; 111. Rotating ring; 112. Roller; 113. Rotating shaft; 114. Push block; 115. First spring; 116. Telescopic column; 12. First electric telescopic rod; 121. Cutting motor; 122. Cutting disc; 13. Cylinder; 131. Push frame; 132. Gear motor; 133. Push rod; 134. Connecting block; 135. First positioning plate; 1351. First inclined plane; 136. Second positioning plate; 1361. Second inclined plane; 137. Connecting strip; 138. Metal spring; 14. Stop frame; 15. Second electric telescopic rod; 151. Top rod; 152. Top block; 153. Push column; 154. Second spring; 155. Inclined block; 2. Metal tube. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] like Figures 1 to 6 As shown in the embodiment of the present invention, a metal tube cutting device for producing insulating ladders includes a cutting table 1. A first electric telescopic rod 12 is mounted on one side of the top of the cutting table 1 via a mounting bracket. A cutting motor 121 is mounted on the output shaft end of the first electric telescopic rod 12. A cutting blade 122 is mounted on the rotating shaft end of the cutting motor 121. Multiple sets of guide rings 11 are fixed on one side of the cutting table 1. A guide structure is provided inside the guide ring 11. A support structure is provided on the side of the top of the cutting table 1 away from the guide ring 11. The guide structure includes a rotating ring 111 rotatably connected inside the guide ring 11, and the metal tube 2 can pass through the interior of the rotating ring 111; The support structure includes two sets of first positioning plates 135 disposed on both sides below the cutting blade 122. Each set of first positioning plates 135 has four plates. During cutting, the four first positioning plates 135 are respectively placed at the four corners inside the metal tube 2. During cutting, the cutting blade 122 is placed between the two sets of first positioning plates 135. A pushing component is disposed on the side of the first positioning plate 135 away from the guide ring 11.

[0023] like Figures 1 to 6 As shown, the pushing assembly includes a cylinder 13 mounted on the top of the cutting table 1. A pusher 131 is fixed to the end of the cylinder 13. A geared motor 132 is mounted on the other side of the pusher 131. A push rod 133 is fixed to the end of the shaft of the geared motor 132. A connecting block 134 is fixed to the other end of the push rod 133. Two sets of first positioning plates 135 are evenly distributed on the outside of the connecting block 134.

[0024] like Figures 1 to 7As shown, a push rod 151 is slidably connected inside the push rod 133. A second electric telescopic rod 15 is installed below one end of the push rod 133. The output shaft end of the second electric telescopic rod 15 is fixedly connected to the push rod 151. A lifting assembly is provided inside the connecting block 134 to push the first positioning plate 135 to adhere to the inner wall of the metal tube 2.

[0025] like Figures 1 to 7 As shown, the lifting assembly includes two sets of top blocks 152 fixed to the end of the top rod 151. A push column 153 is slidably connected inside the connecting block 134. One end of the push column 153 is fixedly connected to the first positioning plate 135. A second spring 154 is fixedly fixed to the outside of the push column 153. The other end of the second spring 154 is fixedly connected to the connecting block 134. An inclined block 155 is fixed to the other end of the push column 153. The top blocks 152 can push the inclined block 155 through the inclined surface.

[0026] like Figures 1 to 8 As shown, a second positioning plate 136 is provided between two adjacent first positioning plates 135. Both sides of the second positioning plate 136 are rotatably connected to connecting strips 137, and the other end of the connecting strips 137 is rotatably connected to the first positioning plate 135.

[0027] like Figures 1 to 8 As shown, the second positioning plate 136 has a second inclined surface 1361 facing the first positioning plate 135 on both sides, and the first positioning plate 135 has a first inclined surface 1351 facing the second positioning plate 136 on both sides. The second inclined surface 1361 and the first inclined surface 1351 can fit together.

[0028] like Figures 1 to 8 As shown, a metal spring 138 is fixed to the inner side of the first positioning plate 135, and the other end of the metal spring 138 is attached to the bottom of the connecting strip 137.

[0029] When cutting the metal tube 2, the metal tube 2 is pushed through the inside of the guide ring 11. At the same time, the cylinder 13 is activated to pull the push rod 133 towards the metal tube 2, so that the metal tube 2 is fitted over the push rod 133. At this time, the two sets of first positioning plates 135 are located on both sides of the cutting blade 122. Then, the second electric telescopic rod 15 is activated to push the top rod 151. The top rod 151 pushes the top block 152 forward. During the movement, the top block 152 pushes the inclined surface of the inclined block 155, which allows the inclined block 155 to push the push column 153 out from the inside of the connecting block 134 through the inclined surface. When the push column 153 extends, it drives the first One positioning plate 135 moves outward, and four first positioning plates 135 move simultaneously, pressing against the four corners of the inner wall of the metal tube 2 to support the inner wall of the metal tube 2. Before the first positioning plates 135 extend, the second positioning plates 136 are stacked outside the first positioning plates 135. When the push column 153 extends, it pulls the connecting strip 137, which pulls the second positioning plates 136 downward. When the first positioning plates 135 on both sides of the second positioning plate 136 are fully extended, the connecting strip 137 pulls the second positioning plate 136 between two adjacent first positioning plates 135. At this time, the second positioning plate 136... 36 is also attached to the inner wall of the metal tube 2 to support it. Simultaneously, the second inclined surface 1361 and the first inclined surface 1351 are attached together, allowing the first positioning plate 135 to support the second positioning plate 136. Then, the cutting motor 121 is started, driving the cutting blade 122 to rotate. At the same time, the first electric telescopic rod 12 is activated, causing the cutting motor 121 to move downwards as a whole. The cutting blade 122 cuts the outside of the metal tube 2. During the cutting process, the reduction motor 132 drives the push rod 133 to rotate. The push rod 133 drives the first positioning plate 135 to rotate, allowing the metal tube 2 to rotate during the cutting process. The cutting blade 122 cuts the metal tube 2 in a circumferential direction. After the cutting is completed, the second electric telescopic rod 15 is activated to pull the top rod 151 to reset. The top rod 151 pulls the top block 152 away from the inclined block 155. At this time, the second spring 154 pushes the inclined block 155 to move towards the middle of the connecting block 134, so that the first positioning plate 135 is away from the inner wall of the metal tube 2. At the same time, the elastic force of the metal spring 138 pushes the connecting strip 137. The connecting strip 137 is subjected to force and lifts the second positioning plate 136 upward. When the first positioning plate 135 is reset, the second positioning plate 136 is stacked again on the outside of the first positioning plate 135.

[0030] like Figures 1 to 4As shown, a stop 14 is fixed on the side of the top of the cutting table 1 away from the guide ring 11. The stop 14 can hold one end of the metal tube 2 against the guide ring 111. Multiple rollers 112 are rotatably connected inside the rotating ring 111. A rotating shaft 113 is fixed on both sides of the rollers 112. A push block 114 is provided on the other side of the rotating shaft 113. A telescopic column 116 is fixed on the other side of the push block 114. The telescopic column 116 is slidably connected inside the rotating ring 111. A first spring 115 is sleeved on the outside of the telescopic column 116. One end of the first spring 115 is fixedly connected to the push block 114. The other end of the first spring 115 is fixedly connected to the rotating ring 111. Multiple unidirectional inclined teeth are provided on the adjacent sides of the rotating shaft 113 and the push block 114. The teeth of the rotating shaft 113 and the teeth of the push block 114 are in opposite directions.

[0031] When cutting the metal tube 2, the metal tube 2 is pushed through the inside of the rotating ring 111. At this time, the metal tube 2 drives the roller 112 to roll forward. At the same time, the roller 112 supports the outside of the metal tube 2. At this time, the rotating shaft 113 rotates in the direction of the inclined surface of the push block 114, so that the push block 114 is pushed towards the telescopic column 116 to squeeze the first spring 115. When the end of the metal tube 2 touches the stop frame 14, the push of the metal tube 2 stops. At this time, the elastic force of the first spring 115 pushes the push block 114 to engage with the rotating shaft 113, so that the roller 112 is fixed. After the cutting is completed, the cylinder 13 pushes the push rod 133 and the first positioning plate 135 to be pulled out from the inside of the metal tube 2. The cut metal tube 2 falls out from the top opening of the cutting table 1.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A metal tube cutting device for producing insulated ladders, characterized in that: The cutting table (1) is provided with a first electric telescopic rod (12) mounted on one side of the top of the cutting table (1) via a mounting bracket. A cutting motor (121) is mounted on the output shaft end of the first electric telescopic rod (12). A cutting blade (122) is mounted on the rotating shaft end of the cutting motor (121). Multiple sets of guide rings (11) are fixed on one side of the cutting table (1). A guide structure is provided inside the guide ring (11). A support structure is provided on the side of the top of the cutting table (1) away from the guide ring (11). The guide structure includes a rotating ring (111) rotatably connected inside the guide ring (11), and the metal tube (2) can pass through the interior of the rotating ring (111); The support structure includes two sets of first positioning plates (135) arranged on both sides below the cutting blade (122). Each set of first positioning plates (135) has four plates. The four first positioning plates (135) are placed at the four corners inside the metal tube (2) during cutting. The cutting blade (122) is placed between the two sets of first positioning plates (135) during cutting. A pushing component is provided on the side of the first positioning plate (135) away from the guide ring (11).

2. The metal tube cutting device for producing insulated ladders according to claim 1, characterized in that: The pushing assembly includes a cylinder (13) mounted on the top of the cutting table (1). A pusher (131) is fixed to the end of the cylinder (13). A geared motor (132) is mounted on the other side of the pusher (131). A push rod (133) is fixed to the end of the shaft of the geared motor (132). A connecting block (134) is fixed to the other end of the push rod (133). Two sets of first positioning plates (135) are evenly distributed outside the connecting block (134).

3. The metal tube cutting device for producing insulated ladders according to claim 2, characterized in that: The push rod (133) is internally slidably connected to a top rod (151). A second electric telescopic rod (15) is installed below one end of the push rod (133). The output shaft end of the second electric telescopic rod (15) is fixedly connected to the top rod (151). The connecting block (134) is internally provided with a lifting component for pushing the first positioning plate (135) to adhere to the inner wall of the metal tube (2).

4. The metal tube cutting device for producing insulated ladders according to claim 3, characterized in that: The lifting assembly includes two sets of top blocks (152) fixed to the end of the top rod (151). A push column (153) is slidably connected inside the connecting block (134). One end of the push column (153) is fixedly connected to the first positioning plate (135). A second spring (154) is fixed to the outside of the push column (153). The other end of the second spring (154) is fixedly connected to the connecting block (134). An inclined block (155) is fixed to the other end of the push column (153). The top block (152) can push the inclined block (155) through the inclined surface.

5. The metal tube cutting device for producing insulated ladders according to claim 4, characterized in that: A second positioning plate (136) is provided between two adjacent first positioning plates (135). Both sides of the second positioning plate (136) are rotatably connected to connecting strips (137), and the other end of the connecting strips (137) is rotatably connected to the first positioning plate (135).

6. The metal tube cutting device for producing insulated ladders according to claim 5, characterized in that: The second positioning plate (136) has a second inclined surface (1361) facing the first positioning plate (135) on both sides, and the first positioning plate (135) has a first inclined surface (1351) facing the second positioning plate (136) on both sides. The second inclined surface (1361) and the first inclined surface (1351) can fit together.

7. The metal tube cutting device for producing insulated ladders according to claim 6, characterized in that: A metal spring (138) is fixed on the inner side of the first positioning plate (135), and the other end of the metal spring (138) is attached to the bottom of the connecting strip (137).

8. The metal tube cutting device for producing insulated ladders according to claim 1, characterized in that: A stop (14) is fixed on the side of the cutting table (1) away from the guide ring (11). The stop (14) can hold one end of the metal tube (2) against the guide ring (111). Multiple rollers (112) are rotatably connected inside the rotating ring (111). A rotating shaft (113) is fixed on both sides of the rollers (112). A push block (114) is provided on the other side of the rotating shaft (113). A telescopic column (116) is fixed on the other side of the push block (114). 6) The telescopic column (116) is slidably connected inside the rotating ring (111). A first spring (115) is sleeved on the outside of the telescopic column (116). One end of the first spring (115) is fixedly connected to the push block (114), and the other end of the first spring (115) is fixedly connected to the rotating ring (111). The rotating shaft (113) and the push block (114) are each provided with a plurality of unidirectional inclined teeth on their adjacent sides. The teeth of the rotating shaft (113) and the teeth of the push block (114) are in opposite directions.

9. A metal tube cutting device for producing insulated ladders according to claim 7, characterized in that: When cutting the metal tube (2), push the metal tube (2) through the inside of the guide ring (11), and at the same time start the cylinder (13) to pull the push rod (133) to move towards the metal tube (2), so that the metal tube (2) is sleeved on the outside of the push rod (133). At this time, the two sets of first positioning plates (135) are located on both sides of the cutting blade (122). Then start the second electric telescopic rod (15) to push the top rod (151). The top rod (151) pushes the top block (152) forward. During the movement, the top block (152) pushes the inclined surface of the inclined block (155), so that the inclined block (155) can push the push column (153) through the inclined surface to extend from the inside of the connecting block (134). The push column (153) extends When the first positioning plate (135) extends, it moves outward. All four first positioning plates (135) move simultaneously and press against the four corners of the inner wall of the metal tube (2) to support the inner wall of the metal tube (2). Before the first positioning plate (135) extends, the second positioning plate (136) is stacked outside the first positioning plate (135). When the push column (153) extends, it pulls the connecting strip (137). The connecting strip (137) pulls the second positioning plate (136) downward. When the first positioning plates (135) on both sides of the second positioning plate (136) are fully extended, the connecting strip (137) pulls the second positioning plate (136) between two adjacent first positioning plates (135). At this time, the second positioning plate... (136) is also attached to the inner wall of the metal tube (2) to support the metal tube (2). At the same time, the second inclined surface (1361) and the first inclined surface (1351) are attached together, so that the first positioning plate (135) supports the second positioning plate (136). Then, the cutting motor (121) is started to drive the cutting blade (122) to rotate. At the same time, the first electric telescopic rod (12) is started to drive the cutting motor (121) to move downward as a whole. The cutting blade (122) cuts the outside of the metal tube (2). During the cutting process, the reduction motor (132) drives the push rod (133) to rotate. The push rod (133) drives the first positioning plate (135) to rotate, which can make the metal tube (2) rotate during the cutting process, so that the cutting... The plate (122) cuts the metal tube (2) in a circumferential direction. After the cutting is completed, the second electric telescopic rod (15) is activated to pull the top rod (151) to reset. The top rod (151) pulls the top block (152) and the inclined block (155) away from each other. At this time, the second spring (154) pushes the inclined block (155) to move towards the middle of the connecting block (134) so ​​that the first positioning plate (135) is away from the inner wall of the metal tube (2). At the same time, the elastic force of the metal spring plate (138) pushes the connecting strip (137). The connecting strip (137) is subjected to force to lift the second positioning plate (136) upward. When the first positioning plate (135) is reset, the second positioning plate (136) is stacked again on the outside of the first positioning plate (135).

10. A metal tube cutting device for producing insulated ladders according to claim 8, characterized in that: When cutting the metal tube (2), push the metal tube (2) through the inside of the rotating ring (111). At this time, the metal tube (2) drives the roller (112) to roll forward. At the same time, the roller (112) supports the outside of the metal tube (2). At this time, the rotating shaft (113) rotates in the direction of the inclined surface of the push block (114) teeth, so that the push block (114) is pushed towards the direction of the telescopic column (116) to squeeze the first spring (115). When the end of the metal tube (2) touches the stop (14), the push of the metal tube (2) stops. At this time, the elastic force of the first spring (115) pushes the push block (114) to mesh with the rotating shaft (113), so that the roller (112) is fixed. After the cutting is completed, the cylinder (13) pushes the push rod (133) and the first positioning plate (135) to be pulled out from the inside of the metal tube (2). The cut metal tube (2) is dropped from the top opening of the cutting table (1).

Images