Special-shaped metal pipe cutting device and using method

Abstract

The invention relates to the technical field of metal cutting devices, and discloses a special-shaped metal pipe cutting device and a using method. The special-shaped metal pipe cutting device comprises a fixing assembly, a force application assembly, an upper tool bit and a lower tool bit, the fixing assembly comprises a pressing block and a base and is used for fixing a special-shaped metal pipe, the force application assembly comprises a force application rod and a movable arm, and when the force application rod is rotated to move downwards, the force application rod and the movable arm rotate in a threaded mode to drive the movable arm to move upwards. Therefore, the upper tool bit and the lower tool bit are driven to simultaneously cut the special-shaped metal pipe. The special-shaped metal pipe cutting device is convenient and fast to operate, and the special-shaped metal pipe is evenly stressed and not prone to deformation in the using process.

Description

Technical Field

[0001] The present invention relates to the technical field of metal cutting devices, and in particular to a special-shaped metal pipe cutting device and a use method thereof. Background Art

[0002] The shaped energy cutting cord is a flexible cutting device with a shaped energy effect that is made by processing a metal tubular detonating cord into a grooved detonating cord. Its main function is to use the metal shaped energy jet generated by the grooved shaped shaped energy cutting cord to cut and separate the separation object from the separation surface into two parts. It is mostly used in special places such as inter-stage separation and head-body separation of rockets. It can also be used in the blasting and demolition, seabed salvage operations, hull and steel cable cutting and separation fields in the civilian industry.

[0003] The length of the energy-gathering cutting rope is generally very long during production. When in use, it is cut with a cutting tool according to the required length. When cutting with traditional scissors, the blade of the scissors does not match the cross-section of the special-shaped metal tube of the energy-gathering cutting rope. The blade cuts and squeezes the local cutting point of the cut surface, and the force is uneven. There is no local protection measure on the cut surface of the cutting rope, which causes the cross-section of the energy-gathering cutting rope to deform. The explosive in the metal tube on the cut surface of the cutting rope is squeezed loose and falls off. At the same time, the cut surface of the cutting rope and the area near the cut surface are locally deformed, causing the local explosive on the cut surface to fall off, affecting the local cutting performance. In addition, the blade of the traditional scissors cutting method wears quickly and the scissors have a large loss. Therefore, it is necessary to propose a special-shaped metal tube cutting device to solve the above problems. Summary of the invention

[0004] Based on the above, the purpose of the present invention is to provide a special-shaped metal tube cutting device and a use method. The special-shaped metal tube cutting device is easy to operate, and the special-shaped metal tube is evenly stressed during use and is not easily deformed.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A special-shaped metal pipe cutting device comprises a fixing assembly, a force-applying assembly, an upper cutter head and a lower cutter head, wherein the fixing assembly is used to fix the special-shaped metal pipe, and the force-applying assembly is used to drive the upper cutter head and the lower cutter head to cut the special-shaped metal pipe;

[0007] The fixing assembly comprises a pressing block and a base, the pressing block is mounted on the base, the special-shaped metal tube is fixedly arranged between the pressing block and the base, along the height direction of the fixing assembly, the pressing block and the base are provided with a first mounting hole and a second mounting hole opposite to each other, the upper cutter head is mounted in the first mounting hole, and the lower cutter head is mounted in the second mounting hole;

[0008] The force-applying assembly comprises a force-applying rod and a movable arm, the movable arm comprising a first movable arm, a second movable arm and a connecting arm, the first movable arm and the second movable arm are connected by the connecting arm, and a first mounting groove and a second mounting groove are respectively provided on the pressing block and the base in a direction horizontally and vertically to the length direction of the special-shaped metal tube, the first movable arm is inserted in the first mounting groove, and the second movable arm is inserted in the second mounting groove; along the force-applying direction of the force-applying rod, a third mounting hole and a fourth mounting hole coaxial with the first mounting hole are respectively provided on the pressing block and the first movable arm, and the force-applying rod passes through the third mounting hole and the fourth mounting hole in sequence and abuts against the upper cutter head;

[0009] When the force applying rod is rotated to move downward, the first movable arm is driven to move upward through the threaded rotation of the force applying rod and the fourth mounting hole, thereby driving the second movable arm to move upward, and the upper cutter head and the lower cutter head cut simultaneously.

[0010] As a preferred solution of the special-shaped metal pipe cutting device, the fixing assembly further includes a limiting member, through which the base and the second movable arm are movably connected.

[0011] As a preferred solution of a special-shaped metal tube cutting device, a first limiting hole is arranged on the base, a second limiting hole is arranged on the second movable arm relative to the first limiting hole, a part of the limiting member is fixedly arranged in the second limiting hole, and the remaining part of the limiting member is movably arranged in the first limiting hole.

[0012] As a preferred solution of the special-shaped metal pipe cutting device, the fixing assembly further includes two positioning pins, and the pressing block and the base are connected and fixed by the positioning pins.

[0013] As a preferred solution of the special-shaped metal tube cutting device, the fixing assembly also includes at least two connecting parts. Along the force application direction of the force application rod, the pressure block is provided with at least two through holes, and the base is provided with a fixing hole relative to each of the through holes. Each of the connecting parts is connected and fixed by passing through one of the through holes and one of the fixing holes in sequence.

[0014] As a preferred solution of the special-shaped metal pipe cutting device, the force-applying assembly also includes a force-applying handle. Along the radial direction of the force-applying rod, a connecting hole is provided at one end of the force-applying rod away from the upper cutting head. The force-applying handle passes through the connecting hole and is fixedly connected to the force-applying rod.

[0015] As a preferred solution of the special-shaped metal pipe cutting device, it also includes a first spring and a second spring, the first spring is sleeved outside the upper cutter head, and the second spring is sleeved outside the lower cutter head.

[0016] As a preferred solution of a device for cutting a special-shaped metal tube, the upper cutter head is adapted to the shape of the outer wall of the special-shaped metal tube, and the lower cutter head is a wedge-shaped body.

[0017] As a preferred solution of a special-shaped metal tube cutting device, along the length direction of the special-shaped metal tube, the pressing block and the opposite sides of the base are respectively provided with a first fixing groove and a second fixing groove, and the first fixing groove and the second fixing groove form a cavity, and the cavity is used to fix the special-shaped metal tube.

[0018] A method for using a special-shaped metal pipe cutting device, based on any of the special-shaped metal pipe cutting devices described above, comprising the following steps:

[0019] Position the special-shaped metal tube in the second fixing groove, position and connect the pressing block with the base through the positioning pin, fix the special-shaped metal tube in the cavity between the pressing block and the base, and then connect and fix the pressing block with the base through the connecting piece;

[0020] Installing the lower cutter head sleeved with the second spring in the second mounting hole;

[0021] Install the movable arm, insert the first movable arm into the first installation slot, insert the second movable arm into the second installation slot, and insert the limiting member into the first limiting hole and the second limiting hole in sequence;

[0022] Installing the upper cutter head sleeved with the first spring in the first mounting hole;

[0023] The force-applying rod is sequentially passed through the third mounting hole and the fourth mounting hole and abuts against the upper cutter head;

[0024] The force-applying rod is rotated to move downward, and the first movable arm is driven to move upward through the threaded rotation of the force-applying rod and the fourth mounting hole, thereby driving the second movable arm to move upward, and the upper cutter head and the lower cutter head cut simultaneously, and the force-applying rod stops rotating after moving to abut against the pressing block, and the upper cutter head and the lower cutter head reach the target cutting position, thereby completing the cutting of the special-shaped metal tube;

[0025] The force-applying rod is rotated in the reverse direction, and the upper cutter head and the lower cutter head are loosened and separated under the elastic force of the first spring and the second spring;

[0026] Remove the connecting piece, separate the pressing block from the base, and take out the cut special-shaped metal tube.

[0027] The beneficial effects of the present invention are:

[0028] The present invention provides a special-shaped metal pipe cutting device, which includes a fixing component, a force-applying component, an upper cutter head and a lower cutter head. The fixing component includes a pressing block and a base for fixing the special-shaped metal pipe. The force-applying component includes a force-applying rod and a movable arm. When the force-applying rod is rotated to move downward, the force-applying rod and the movable arm are threadedly rotated to drive the movable arm to move upward, thereby driving the upper cutter head and the lower cutter head to cut the special-shaped metal pipe at the same time. During the cutting process, the force-applying rod applies force evenly, and the surface of the special-shaped metal pipe is stressed at the same time, so that the surface of the special-shaped metal pipe is kept from being deformed, so that the filling material in the metal pipe does not fall off, and the performance of the special-shaped metal pipe is not affected.

[0029] The present invention also provides a method for using a special-shaped metal tube cutting device. Since the special-shaped metal tube is pressed between the pressing block and the base, the shape of the cavity between the pressing block and the base is consistent with the cross-sectional shape of the special-shaped metal tube. The cut cross-sectional shape can be protected from being destroyed during the cutting process, and the surface of the special-shaped metal tube is prevented from deformation. At the same time, the upper cutter head is consistent with the local shape of the upper surface of the special-shaped metal tube, and the lower cutter head is consistent with the local shape of the lower surface of the special-shaped metal tube, ensuring that the contact surface between the cutter head and the special-shaped metal tube is uniformly stressed during the cutting operation. The above-mentioned method of use is easy to operate, and the force-applying rod is designed as a rotating threaded structure. The force-applying rod applies force to the special-shaped metal tube uniformly. The operator only needs to use a small external force to act on the force-applying rod to cut the special-shaped metal tube, thereby reducing the labor intensity of the operator. The cutter head can be replaced in time after being worn, thereby reducing the loss caused by the scrapping of the entire device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0031] Figure 1 is a cross-sectional view of a special-shaped metal pipe cutting device provided by an embodiment of the present invention from one viewing angle;

[0032] Figure 2 is a partial cross-sectional view of the special-shaped metal pipe cutting device provided by an embodiment of the present invention from another perspective;

[0033] Figure 3 It is a top view of the special-shaped metal pipe cutting device provided by an embodiment of the present invention.

[0034] In the figure:

[0035] 1. Fixing assembly; 11. Pressing block; 111. First mounting groove; 12. Base; 121. Second mounting groove; 13. Limiting member; 14. Connecting member;

[0036] 2. force-applying assembly; 21. force-applying rod; 22. movable arm; 221. first movable arm; 222. connecting arm; 223. second movable arm; 23. force-applying handle;

[0037] 3. Upper cutter head; 4. Lower cutter head; 5. First spring; 6. Second spring;

[0038] 101. Special-shaped metal tubes. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0040] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] In the description of the present embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0043] like Figures 1 to 3 As shown, this embodiment provides a special-shaped metal pipe cutting device, including a fixing component 1, a force-applying component 2, an upper cutter head 3 and a lower cutter head 4, the fixing component 1 is used to fix the special-shaped metal pipe 101, and the force-applying component 2 is used to drive the upper cutter head 3 and the lower cutter head 4 to cut the special-shaped metal pipe 101; the fixing component 1 includes a pressing block 11 and a base 12, the pressing block 11 is installed on the base 12, the special-shaped metal pipe 101 is fixedly arranged between the pressing block 11 and the base 12, along the height direction of the fixing component 1, the pressing block 11 and the base 12 are relatively provided with a first mounting hole and a second mounting hole, the upper cutter head 3 is installed in the first mounting hole, and the lower cutter head 4 is installed in the second mounting hole, wherein the cutter heads are movably connected in the mounting holes to facilitate the cutting operation; the force-applying component 2 includes a force-applying rod 21 and a movable arm 22, the movable arm 22 includes a first movable arm 221, a second movable arm 223 and a connecting arm 222, the first movable arm 221, the second movable arm 223 and the connecting arm 222, the second movable arm 224 and the second movable arm 225. A movable arm 221 and a second movable arm 223 are connected by a connecting arm 222. Along a direction horizontally and perpendicular to the length direction of the special-shaped metal tube 101, a first mounting groove 111 and a second mounting groove 121 are respectively provided on the pressing block 11 and the base 12. The first movable arm 221 is inserted in the first mounting groove 111, and the second movable arm 223 is inserted in the second mounting groove 121. Along the force direction of the force application rod 21, the pressing block 11 and the first movable arm 221 are respectively provided with a third mounting hole and a fourth mounting hole coaxial with the first mounting hole. The force application rod 21 is penetrated through the third mounting hole and the fourth mounting hole in sequence and abuts against the upper cutter head 3. When the force application rod 21 is rotated to move downward, the force application rod 21 and the fourth mounting hole thread rotate to drive the first movable arm 221 to move upward, and the second movable arm 223 is driven to move upward through the connecting arm 222, so that the upper cutter head 3 and the lower cutter head 4 are cut at the same time. During the cutting process, the force rod 21 applies force evenly and the surface of the special-shaped metal tube 101 is stressed at the same time, so that the surface of the special-shaped metal tube 101 is kept from being deformed, and the filling material in the metal tube does not fall off, and the performance of the special-shaped metal tube 101 is not affected.

[0044] In this embodiment, the first mounting groove 111 and the second mounting groove 121 are used to place the first movable arm 221 and the second movable arm 223. The cross-section of the first mounting groove 111 and the second mounting groove 121 is preferably rectangular, and the cross-section thereof is adapted to the cross-section of the first movable arm 221 and the second movable arm 223. In addition, since the first movable arm 221 and the second movable arm 223 can move up and down relatively with the up and down movement of the force application rod 21, the cross-sectional height of the first mounting groove 111 and the second mounting groove 121 along the height direction of the fixing component 1 is greater than the height of the first movable arm 221 and the second movable arm 223, so that there is space for the first movable arm 221 and the second movable arm 223 to move in the first mounting groove 111 and the second mounting groove 121. The height of the cross-sectional height of the first mounting groove 111 along the height direction of the fixing component 1 is not specifically limited here. Among them, when the cutting device of the special-shaped metal tube 101 is in an uncutting state, the height of the cavity formed after the second movable arm 223 is placed in the second installation groove 121 is equal to the cutting height required for the lower surface of the metal tube. When the second movable arm 223 moves upward until the upper surface of the second movable arm 223 abuts against the base 12, the cutting of the metal tube is completed.

[0045] Preferably, the length of the first installation groove 111 and the second installation groove 121 along the length direction of the special-shaped metal tube 101 is limited to the first movable arm 221 and the second movable arm 223. Of course, in other implementations, the first installation groove 111 and the second installation groove 121 can be set as through grooves, and the size of which can accommodate the first movable arm 221 and the second movable arm 223 is determined according to actual conditions.

[0046] In this embodiment, the force rod 21 is threadedly connected to the fourth mounting hole. During the downward movement of the force rod 21, the force rod 21 and the movable arm 22 rotate relative to each other. The force rod 21 acts on the upper cutter head 3 and is subjected to the reaction force generated when the upper cutter head 3 cuts the special-shaped metal tube 101, thereby driving the movable arm 22 to move upward. Therefore, the force of the force rod 21 on the upper cutter head 3 is equal to the force of the second movable arm 223 on the lower cutter head 4, and the upper and lower surfaces of the special-shaped metal tube 101 are cut at the same time. When the movable arm 22 moves upward until the second movable arm 223 abuts against the base 12 and the force rod 21 moves downward until the force rod 21 abuts against the pressing block 11, the upper cutter head 3 and the lower cutter head 4 simultaneously reach the target cutting position of the special-shaped metal tube 101, and the cutting of the special-shaped metal tube 101 is completed. In addition, since the force rod 21 is designed as a rotating thread structure, the force rod 21 applies force to the special-shaped metal pipe 101 evenly, and the operator only needs to use a small external force to act on the force rod 21 to cut the special-shaped metal pipe 101, thereby reducing the operator's labor intensity.

[0047] Preferably, the upper cutter head 3 is adapted to the shape of the outer wall of the special-shaped metal tube 101, and the lower cutter head 4 is a wedge-shaped body. When the shape of the outer wall of the special-shaped metal tube 101 is circular, the upper cutter head 3 is semicircular and adapted to the shape of the outer wall of the circular metal tube 101, and the lower cutter head 4 is a wedge-shaped body with a U-shaped cross-section, and the bottom of the U-shaped arc faces the special-shaped metal tube 101, and is adapted to the shape of the lower half of the outer wall of the circular metal tube 101, and is used to cut the special-shaped metal tube 101. This prevents the outer wall of the special-shaped metal tube 101 from being subjected to uneven force when cutting with traditional linear scissors, thereby causing deformation of the cross-section of the special-shaped metal tube 101. At the same time, when cutting with traditional linear scissors, the blade wears quickly, which causes greater wear on the scissors and affects the use cost of the cutting device. In addition, the movable upper cutter head 3 and the lower cutter head 4 can be replaced in time after they are worn, thereby reducing the loss caused by the scrapping of the entire device.

[0048] Furthermore, the device for cutting the special-shaped metal tube 101 further includes a first spring 5 and a second spring 6, wherein the first spring 5 is sleeved outside the upper cutter head 3, and the second spring 6 is sleeved outside the lower cutter head 4. After the cutting of the special-shaped metal tube 101 is completed, the force-applying rod 21 is rotated in the opposite direction, and the force-applying rod 21 is continuously moved upward, and the upper cutter head 3 and the lower cutter head 4 are continuously opened under the elastic force of the first spring 5 and the second spring 6, respectively, until the springs are completely uncompressed, and the upper cutter head 3 and the lower cutter head 4 are released in the opposite direction, and the recovery of the upper cutter head 3 and the lower cutter head 4 is completed.

[0049] Preferably, along the length direction of the special-shaped metal tube 101, the first fixing groove and the second fixing groove (not shown in the figure) are respectively provided on the opposite sides of the pressing block 11 and the base 12, and the first fixing groove and the second fixing groove form a cavity, and the cavity is used to fix the special-shaped metal tube 101. The cross-sectional shape of the cavity is consistent with the cross-sectional shape of the special-shaped metal tube 101, and the cut cross-sectional shape can be protected from being damaged during the cutting process, so as to prevent the cross-sectional deformation and extrusion of the special-shaped metal tube 101, which causes the material in the special-shaped metal tube 101 to fall out, thereby affecting the performance of the special-shaped metal tube 101.

[0050] Furthermore, the fixing assembly 1 further includes a limiting member 13, through which the base 12 is movably connected to the second movable arm 223. The setting of the limiting member 13 allows the second movable arm 223 to move only in the height direction of the fixing assembly 1, and limits the horizontal movement of the second movable arm 223, thereby limiting the horizontal movement of the movable arm 22 as a whole, which facilitates the cutting operation. The limiting member 13 is preferably a limiting pin, which can be movably connected to the second movable arm 223. In other embodiments, the limiting pin can also be set to other structures, which are specifically determined according to actual conditions.

[0051] Furthermore, the base 12 is provided with a first limiting hole, the second movable arm 223 is provided with a second limiting hole relative to the first limiting hole, the limiting member 13 is partially fixedly arranged in the second limiting hole, and the remaining part of the limiting member 13 is movably arranged in the first limiting hole. The limiting member 13 is preferably a limiting nail, the limiting nail includes a limiting nail rod and a limiting nail head, the limiting nail rod is movably arranged in the first limiting hole, the limiting nail head is fixedly arranged in the second limiting hole, the aperture of the first limiting hole is slightly larger than the outer diameter of the limiting nail rod, and the outer diameter of the limiting nail rod is not less than the outer diameter of the nail head, so that the second movable arm 223 can move up and down relative to the base 12.

[0052] Specifically, the fixing assembly 1 also includes two positioning pins (not shown in the figure), and the pressing block 11 and the base 12 are connected and positioned by the positioning pins. Two positioning holes are respectively provided on the opposite sides of the base 12 and the pressing block 11, and the positioning holes are used to insert the positioning pins. During installation, the two positioning pins are first pressed into the two positioning holes of the base 12, and then the positioning of the special-shaped metal tube 101 is completed. Finally, the pressing block 11 is installed corresponding to the base 12 through the positioning pins to complete the positioning of the pressing block 11 and the base 12. The positioning is specifically performed by two pins on one side. Since this positioning method is a mature technology, it will not be elaborated here.

[0053] Specifically, the fixing assembly 1 further includes at least two connecting members 14. Along the force application direction of the force application rod 21, the pressing block 11 is provided with at least two through holes, and the base 12 is provided with a fixing hole relative to each through hole. Each connecting member 14 passes through a through hole and a fixing hole opposite to the through hole in sequence to achieve the connection and fixation of the pressing block 11 and the base 12. The fixing hole is preferably a threaded hole, and the connecting member 14 is preferably a threaded nail. The connection and fixation of the pressing block 11 and the base 12 are achieved by connecting the threaded nail to the through hole and the threaded fixing hole in sequence. In this embodiment, four connecting members 14 are provided. Of course, in other embodiments, two, three, five or more connecting members 14 may also be provided, which is determined according to actual conditions.

[0054] Preferably, the force applying assembly 2 further includes a force applying handle 23. A connection hole is provided at one end of the force applying rod 21 away from the upper cutter head 3 along the radial direction of the force applying rod 21. The force applying handle 23 passes through the connection hole and is fixedly connected to the force applying rod 21. The force applying rod 21 and the force applying handle 23 are arranged vertically. By rotating the force applying handle 23, external force can be applied to the force applying rod 21, which is labor-saving and efficient.

[0055] This embodiment also provides a method for using the special-shaped metal tube 101 cutting device, the steps comprising:

[0056] Position the special-shaped metal tube 101 in the second fixing groove, position and connect the pressure block 11 and the base 12 through the positioning pin, fix the special-shaped metal tube 101 in the cavity between the pressure block 11 and the base 12, and then connect and fix the pressure block 11 and the base 12 through the connecting piece 14; install the lower cutter head 4 with the second spring 6 in the second mounting hole; install the movable arm 22, insert the first movable arm 221 in the first mounting groove 111, insert the second movable arm 223 in the second mounting groove 121, and insert the limiting member 13 in the first limiting hole and the second limiting hole in sequence; install the upper cutter head 3 with the first spring 5 in the first mounting hole; pass the force rod 21 through the third mounting hole and the fourth mounting hole in sequence and abut against the upper cutter head 3.

[0057] The force rod 21 is rotated to move downward, and the first movable arm 221 is driven to move upward through the threaded rotation of the force rod 21 and the fourth mounting hole, thereby driving the second movable arm 223 to move upward, and the upper cutter head 3 and the lower cutter head 4 cut at the same time. The force rod 21 moves to abut against the pressing block 11 and then stops rotating. The upper cutter head 3 and the lower cutter head 4 reach the target cutting position, completing the cutting of the special-shaped metal tube 101.

[0058] The force rod 21 is rotated in the opposite direction, and the upper cutter head 3 and the lower cutter head 4 are loosened and separated under the elastic force of the first spring 5 and the second spring 6; the connecting piece 14 is removed, the pressing block 11 and the base 12 are separated, and the cut special-shaped metal tube 101 is taken out.

[0059] The method for using the above-mentioned special-shaped metal tube 101 cutting device is easy to operate. At the same time, the special-shaped metal tube 101 is evenly stressed during the cutting process, and the operation is convenient. The operator only needs to use a small external force to act on the force rod 21 to cut the special-shaped metal tube 101, thereby reducing the labor intensity of the operator. The cutter head can be replaced in time after being worn, thereby reducing the loss caused by the scrapping of the entire device.

[0060] The above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A device for cutting special-shaped metal pipes, characterized in that: It includes a fixing component, a force-applying component, an upper cutter head and a lower cutter head, wherein the fixing component is used to fix the special-shaped metal pipe, and the force-applying component is used to drive the upper cutter head and the lower cutter head to cut the special-shaped metal pipe; The fixing assembly comprises a pressing block and a base, the pressing block is mounted on the base, the special-shaped metal tube is fixedly arranged between the pressing block and the base, along the height direction of the fixing assembly, the pressing block and the base are provided with a first mounting hole and a second mounting hole opposite to each other, the upper cutter head is mounted in the first mounting hole, and the lower cutter head is mounted in the second mounting hole; The force-applying assembly comprises a force-applying rod and a movable arm, the movable arm comprising a first movable arm, a second movable arm and a connecting arm, the first movable arm and the second movable arm are connected by the connecting arm, and a first mounting groove and a second mounting groove are respectively provided on the pressing block and the base in a direction horizontally and vertically to the length direction of the special-shaped metal tube, the first movable arm is inserted in the first mounting groove, and the second movable arm is inserted in the second mounting groove; along the force-applying direction of the force-applying rod, a third mounting hole and a fourth mounting hole coaxial with the first mounting hole are respectively provided on the pressing block and the first movable arm, and the force-applying rod passes through the third mounting hole and the fourth mounting hole in sequence and abuts against the upper cutter head; When the force applying rod is rotated to move downward, the first movable arm is driven to move upward through the threaded rotation of the force applying rod and the fourth mounting hole, thereby driving the second movable arm to move upward, and the upper cutter head and the lower cutter head cut simultaneously.

2. The special-shaped metal pipe cutting device according to claim 1, characterized in that: The fixing assembly further comprises a limiting member, through which the base and the second movable arm are movably connected.

3. The special-shaped metal pipe cutting device according to claim 2, characterized in that: The base is provided with a first limiting hole, the second movable arm is provided with a second limiting hole opposite to the first limiting hole, the limiting member is partially fixedly arranged in the second limiting hole, and the remaining part of the limiting member is movably arranged in the first limiting hole.

4. The special-shaped metal pipe cutting device according to claim 1, characterized in that: The fixing assembly further comprises two positioning pins, and the pressing block and the base are connected and fixed by the positioning pins.

5. The special-shaped metal pipe cutting device according to claim 1, characterized in that: The fixing assembly also includes at least two connecting members. Along the force application direction of the force application rod, the pressure block is provided with at least two through holes, the base is provided with a fixing hole relative to each of the through holes, and each of the connecting members is connected and fixed by passing through one of the through holes and one of the fixing holes in sequence.

6. The special-shaped metal pipe cutting device according to claim 1, characterized in that: The force applying assembly also includes a force applying handle. Along the radial direction of the force applying rod, a connecting hole is provided at one end of the force applying rod away from the upper cutter head. The force applying handle passes through the connecting hole and is fixedly connected to the force applying rod.

7. The special-shaped metal pipe cutting device according to claim 1, characterized in that: It also includes a first spring and a second spring, wherein the first spring is sleeved outside the upper cutter head, and the second spring is sleeved outside the lower cutter head.

8. The special-shaped metal pipe cutting device according to claim 1, characterized in that: The upper cutter head is adapted to the outer wall shape of the special-shaped metal tube, and the lower cutter head is a wedge-shaped body.

9. The special-shaped metal pipe cutting device according to claim 1, characterized in that: Along the length direction of the special-shaped metal tube, the pressing block and the base are respectively provided with a first fixing groove and a second fixing groove on one side opposite to the other. The first fixing groove and the second fixing groove form a cavity, and the cavity is used to fix the special-shaped metal tube.

10. A method for using a special-shaped metal pipe cutting device, based on the special-shaped metal pipe cutting device according to any one of claims 1 to 9, characterized in that the steps include: Position the special-shaped metal tube in the second fixing groove, position and connect the pressing block with the base through the positioning pin, fix the special-shaped metal tube in the cavity between the pressing block and the base, and then connect and fix the pressing block with the base through the connecting piece; Installing the lower cutter head sleeved with the second spring in the second mounting hole; Install the movable arm, insert the first movable arm into the first installation slot, insert the second movable arm into the second installation slot, and insert the limiting member into the first limiting hole and the second limiting hole in sequence; Installing the upper cutter head sleeved with the first spring in the first mounting hole; The force-applying rod is sequentially passed through the third mounting hole and the fourth mounting hole and abuts against the upper cutter head; The force-applying rod is rotated to move downward, and the first movable arm is driven to move upward through the threaded rotation of the force-applying rod and the fourth mounting hole, thereby driving the second movable arm to move upward, and the upper cutter head and the lower cutter head cut simultaneously, and the force-applying rod stops rotating after moving to abut against the pressing block, and the upper cutter head and the lower cutter head reach the target cutting position, thereby completing the cutting of the special-shaped metal tube; The force-applying rod is rotated in the reverse direction, and the upper cutter head and the lower cutter head are loosened and separated under the elastic force of the first spring and the second spring; Remove the connecting piece, separate the pressing block from the base, and take out the cut special-shaped metal tube.

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