A cutting device for cutting a profiled metal tube and a method of use

Abstract

The present application relates to the technical field of metal cutting device, disclose a special-shaped metal pipe cutting device and method for using. The special-shaped metal pipe cutting device includes fixed assembly, force assembly, upper cutter and lower cutter, the fixed assembly includes briquetting and base, for fixing special-shaped metal pipe, the force assembly includes force rod and movable arm, when the force rod is downward movement, the force rod and movable arm screw rotation drive movable arm upward movement, thereby drive upper cutter and lower cutter cut special-shaped metal pipe simultaneously. The special-shaped metal pipe cutting device is convenient to operate, and the special-shaped metal pipe is evenly stressed in the use process, and is not easy to deform.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal cutting device, in particular to a special-shaped metal pipe cutting device and a using method thereof. BACKGROUND

[0002] The shaped cutting cable is a flexible cutting device with shaped effect, which is made by processing the metal tubular detonating cable into a grooved detonating cable. The main function is to cut and separate the object from the separation surface by the metal shaped jet generated after the grooved shaped cutting cable works. It is mainly used in the separation of rocket stages and heads, and can also be used in the cutting and separation of ships and steel cables in the field of underwater salvage operations.

[0003] The length of the shaped cutting cable is generally very long during production. In use, the length needed is cut by cutting tools. When the traditional scissors cut, the cutting edge of the scissors does not match the cross section of the special-shaped metal pipe of the shaped cutting cable. The cutting edge and the local cutting point of the cut surface are cut and extruded, the force is uneven, there is no protective measure for the local cutting surface of the cutting cable, the cross section of the shaped cutting cable is deformed, the explosive in the cutting surface of the cutting cable is extruded and scattered and falls off, and the cutting surface and the local area near the cutting surface are deformed, which causes the local explosive to fall off and affects the local cutting performance. In addition, the traditional cutting method of scissors has a fast cutting edge wear and a large scissors loss. Therefore, a special-shaped metal pipe cutting device is needed to solve the above problems. SUMMARY

[0004] Based on the above, the purpose of the present application is to provide a special-shaped metal pipe cutting device and a using method thereof. The special-shaped metal pipe cutting device is convenient to operate, and the special-shaped metal pipe is uniformly stressed and not easy to deform during use.

[0005] To achieve the above purpose, the following technical solutions are adopted:

[0006] A special-shaped metal pipe cutting device, comprising a fixing assembly, a force applying assembly, an upper cutter head and a lower cutter head, the fixing assembly is used for fixing the special-shaped metal pipe, the force applying assembly is used for driving 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 installed on the base, the special-shaped metal pipe is fixedly arranged between the pressing block and the base, along the height direction of the fixing assembly, first and second mounting holes are oppositely arranged in the pressing block and the base, the upper cutter head is installed in the first mounting hole, and the lower cutter head is installed in the second mounting hole;

[0008] The force applying assembly comprises a force applying rod and a movable arm, the movable arm comprises a first movable arm, a second movable arm and a connecting arm, the first movable arm and the second movable arm are connected through the connecting arm, along a direction perpendicular to a length direction of the special-shaped metal pipe, the pressing block and the base are respectively provided with a first mounting slot and a second mounting slot, the first movable arm is inserted into the first mounting slot, and the second movable arm is inserted into the second mounting slot; along a force applying direction of the force applying rod, the pressing block and the first movable arm are respectively provided with a third mounting hole coaxial with the first mounting hole and a fourth mounting hole, the force applying rod is sequentially threaded through the third mounting hole and the fourth mounting hole 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, so that the second movable arm is driven to move upward, and the upper cutter head and the lower cutter head are simultaneously cut.

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

[0011] As a preferred scheme of the special-shaped metal pipe cutting device, the base is provided with a first limiting hole, the second movable arm is provided with a second limiting hole relative to the first limiting hole, and the limiting piece is partially fixedly arranged in the second limiting hole and movably arranged in the first limiting hole.

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

[0013] As a preferred scheme of the special-shaped metal pipe cutting device, the fixing assembly further comprises at least two connecting pieces, along the force applying direction of the force applying rod, the pressing block is provided with at least two through holes, the base is provided with a fixing hole relative to each through hole, and each connecting piece is sequentially threaded through one through hole and one fixing hole to be connected and fixed.

[0014] As a preferred scheme of the special-shaped metal pipe cutting device, the force applying assembly further comprises a force applying handle, along a radial direction of the force applying rod, one end of the force applying rod away from the upper cutter head is provided with a connecting hole, and the force applying handle is threaded through the connecting hole and fixedly connected with the force applying rod.

[0015] As a preferred scheme of the special-shaped metal pipe cutting device, the device further comprises 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 scheme of the special-shaped metal pipe cutting device, the upper cutter head is matched with the outer wall shape of the special-shaped metal pipe, and the lower cutter head is a wedge-shaped body.

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

[0018] A use method of the special-shaped metal pipe cutting device based on any one of the special-shaped metal pipe cutting devices, and the steps include:

[0019] The special-shaped metal pipe is positioned in the second fixing groove, the pressing block and the base are positioned and connected through the positioning pin, the special-shaped metal pipe is fixed in the cavity between the pressing block and the base, and the pressing block and the base are connected and fixed through the connecting piece.

[0020] The lower cutter head sleeved with the second spring is installed in the second mounting hole;

[0021] The movable arm is installed, the first movable arm is inserted into the first mounting slot, the second movable arm is inserted into the second mounting slot, and the limiting piece is sequentially inserted into the first limiting hole and the second limiting hole;

[0022] The upper cutter head sleeved with the first spring is installed in the first mounting hole;

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

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

[0025] The force applying rod is reversely rotated, 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] The connecting piece is removed, the pressing block and the base are separated, and the cut special-shaped metal pipe is taken out.

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

[0028] The application provides a special-shaped metal pipe cutting device, which comprises a fixing assembly, a force applying assembly, an upper cutter head and a lower cutter head, the fixing assembly comprises a pressing block and a base, and is used for fixing the special-shaped metal pipe, the force applying assembly comprises a force applying rod and a movable arm, when the force applying rod rotates and moves downward, the force applying rod and the movable arm are threadedly rotated to drive the movable arm to move upward, so that the upper cutter head and the lower cutter head cut the special-shaped metal pipe at the same time. During the cutting process, the force applying rod applies force uniformly, and the surface of the special-shaped metal pipe is subjected to force at the same time, so that the surface of the special-shaped metal pipe is prevented from being deformed, and the filling material in the metal pipe is prevented from falling off, and the performance of the special-shaped metal pipe is not affected.

[0029] The application also provides a use method of the special-shaped metal pipe cutting device. Since the special-shaped metal pipe is pressed between the pressing block and the base, the cavity shape between the pressing block and the base is consistent with the cross-sectional shape of the special-shaped metal pipe, the cutting cross-sectional shape is prevented from being damaged during the cutting process, the surface of the special-shaped metal pipe is prevented from being deformed, the upper cutter head is consistent with the upper surface of the special-shaped metal pipe in partial shape, the lower cutter head is consistent with the lower surface of the special-shaped metal pipe in partial shape, and the contact surface of the cutter head and the special-shaped metal pipe is uniformly subjected to force during the cutting operation. The use method is convenient to operate, the force applying rod is designed as a rotating threaded structure, the force applying rod applies force uniformly to the special-shaped metal pipe, the operator only needs to use small external force on the force applying rod, the special-shaped metal pipe can be cut, the labor intensity of the operator is reduced, the cutter head can be replaced in time after being worn, and the loss caused by scrapping of the whole device is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the application. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art according to the contents of the embodiments of the application and the drawings without any creative effort.

[0031] Fig. 1 is a sectional view of a special-shaped metal pipe cutting device from one perspective provided by the embodiments of the application;

[0032] Fig. 2 is a partial sectional view of a special-shaped metal pipe cutting device from another perspective provided by the embodiments of the application;

[0033] Fig. 3 is a top view of a special-shaped metal pipe cutting device provided by the embodiments of the application.

[0034] In the drawings:

[0035] 1, fixing assembly; 11, pressing block; 111, first mounting groove; 12, base; 121, second mounting groove; 13, limiting piece; 14, connecting piece;

[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 pipe. DETAILED DESCRIPTION

[0039] The application will be further described below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are merely intended for explaining the application, but not limiting the application. In addition, it should be noted that only the parts related to the application are shown in the drawings for the convenience of description, but not all the structures.

[0040] In the description of the application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrated; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0041] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "under" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0042] In the description of the present embodiment, the terms "upper", "lower", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, which is only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0043] AsFigs. 1 to 3 As shown, the embodiment provides a special-shaped metal pipe cutting device, which comprises a fixing assembly 1, a force applying assembly 2, an upper cutter head 3 and a lower cutter head 4. The fixing assembly 1 is used for fixing the special-shaped metal pipe 101. The force applying assembly 2 is used for driving the upper cutter head 3 and the lower cutter head 4 to cut off the special-shaped metal pipe 101. The fixing assembly 1 comprises 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 assembly 1, a first mounting hole and a second mounting hole are oppositely arranged in the pressing block 11 and the base 12. The upper cutter head 3 is installed in the first mounting hole. The lower cutter head 4 is installed in the second mounting hole. The cutter heads are movably connected in the mounting holes, which facilitates the cutting operation. The force applying assembly 2 comprises a force applying rod 21 and a movable arm 22. The movable arm 22 comprises a first movable arm 221, a second movable arm 223 and a connecting arm 222. The first movable arm 221 and the second movable arm 223 are connected through the connecting arm 222. Along the direction which is horizontally perpendicular to the length direction of the special-shaped metal pipe 101, a first mounting groove 111 and a second mounting groove 121 are respectively arranged on the pressing block 11 and the base 12. The first movable arm 221 is inserted in the first mounting groove 111. The second movable arm 223 is inserted in the second mounting groove 121. Along the force applying direction of the force applying 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 which are coaxial with the first mounting hole. The force applying rod 21 is sequentially inserted through the third mounting hole and the fourth mounting hole and abuts against the upper cutter head 3. When the force applying rod 21 is rotated and moves downward, the force applying rod 21 is threadedly rotated with the fourth mounting hole, drives the first movable arm 221 to move upward, drives the second movable arm 223 to move upward through the connecting arm 222, and thus the upper cutter head 3 and the lower cutter head 4 cut at the same time. During the cutting-off process, the force applying rod 21 uniformly applies force, and the surface of the special-shaped metal pipe 101 is simultaneously subjected to force, so that the surface of the special-shaped metal pipe 101 does not deform, and thus the filling material in the metal pipe does not fall off and does not affect the performance of the special-shaped metal pipe 101.

[0044] In the embodiment, the first mounting slot 111 and the second mounting slot 121 are used for placing the first movable arm 221 and the second movable arm 223, and the cross section of the first mounting slot 111 and the second mounting slot 121 is preferably rectangular, which 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 relative to the upper and lower movement of the force applying rod 21, the cross section height of the first mounting slot 111 and the second mounting slot 121 along the height direction of the fixed assembly 1 is greater than the height of the first movable arm 221 and the second movable arm 223, so that the first mounting slot 111 and the second mounting slot 121 have space for the movement of the first movable arm 221 and the second movable arm 223, and the height of the cross section of the first mounting slot 111 along the height direction of the fixed assembly 1 is not limited here. When the special-shaped metal pipe 101 cutting device is in the uncut state, the height of the cavity formed after the second mounting slot 121 places the second movable arm 223 is equal to the required cutting height of the lower surface of the metal pipe, and when the second movable arm 223 moves upward to the abutment of the upper surface of the second movable arm 223 and the base 12, the cutting of the metal pipe is completed.

[0045] Preferably, the length of the first mounting slot 111 and the second mounting slot 121 along the length direction of the special-shaped metal pipe 101 is limited to the first movable arm 221 and the second movable arm 223. Of course, in other embodiments, the first mounting slot 111 and the second mounting slot 121 can be provided as through slots, which can place the first movable arm 221 and the second movable arm 223, and the specific determination is based on the actual situation.

[0046] In the embodiment, the force applying rod 21 is threadedly connected with the fourth mounting hole, and in the process of downward movement of the force applying rod 21, the force applying rod 21 threadedly rotates relative to the movable arm 22, the force applying rod 21 acts on the upper cutter head 3, and the force applying rod 21 is subjected to the reaction force generated when the upper cutter head 3 cuts the special-shaped metal pipe 101, thereby driving the movable arm 22 to move upward. Therefore, the force of the force applying 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 surface and the lower surface of the special-shaped metal pipe 101 are cut at the same time, and when the movable arm 22 moves upward to the abutment of the second movable arm 223 and the base 12, and the force applying rod 21 moves downward to the abutment of the force applying rod 21 and the pressing block 11, the upper cutter head 3 and the lower cutter head 4 reach the target cutting position of the special-shaped metal pipe 101 at the same time, and the cutting of the special-shaped metal pipe 101 is completed. In addition, since the force applying rod 21 is designed as a rotating threaded structure, the force applying rod 21 uniformly applies force to the special-shaped metal pipe 101, and the operator only needs to use a small external force on the force applying rod 21, so that the special-shaped metal pipe 101 can be cut, thereby reducing the labor intensity of the operator.

[0047] Preferably, the upper cutter head 3 is adapted to the outer wall shape of the irregular metal tube 101, and the lower cutter head 4 is wedge-shaped. When the outer wall shape of the irregular metal tube 101 is circular, the upper cutter head 3 is semi-circular and adapted to the outer wall shape of the circular metal tube 101, while the lower cutter head 4 is wedge-shaped with a U-shaped cross-section, the bottom of the U-shape facing the irregular metal tube 101, and adapted to the lower half of the outer wall shape of the circular metal tube 101, used for cutting the irregular metal tube 101. This prevents uneven stress on the outer wall of the irregular metal tube 101 when using traditional straight shears, which could lead to cross-sectional deformation of the irregular metal tube 101. Additionally, traditional straight shears cause rapid blade wear, resulting in significant wear on the shears and impacting the operating cost of the cutting device. Furthermore, the movable upper cutter head 3 and lower cutter head 4 can be replaced promptly after wear, reducing the loss caused by the scrapping of the entire device.

[0048] Furthermore, the cutting device for the irregular metal tube 101 also includes a first spring 5 and a second spring 6. The first spring 5 is sleeved on the upper cutter head 3, and the second spring 6 is sleeved on the lower cutter head 4. After the cutting of the irregular metal tube 101 is completed, the force-applying rod 21 is rotated in the opposite direction. The force-applying rod 21 moves upward continuously, and the upper cutter head 3 and the lower cutter head 4 open continuously under the elastic force of the first spring 5 and the second spring 6, respectively, until the springs are completely uncompressed. The upper cutter head 3 and the lower cutter head 4 then release in opposite directions, completing the retraction of the upper cutter head 3 and the lower cutter head 4.

[0049] Preferably, along the length of the shaped metal tube 101, the pressure block 11 and the base 12 are respectively provided with a first fixing groove and a second fixing groove (neither shown in the figure) on opposite sides. The first fixing groove and the second fixing groove form a cavity for fixing the shaped metal tube 101. The cross-sectional shape of the cavity is consistent with the cross-sectional shape of the shaped metal tube 101. During the cutting process, it can protect the cut cross-sectional shape from being damaged and prevent the material inside the shaped metal tube 101 from falling out due to deformation and squeezing, which would affect the performance of the shaped metal tube 101.

[0050] Furthermore, the fixing component 1 also includes a limiting member 13, which movably connects the base 12 to the second movable arm 223. The limiting member 13 restricts the movement of the second movable arm 223 to the height direction of the fixing component 1, thus limiting the horizontal movement of the second movable arm 223 and consequently limiting the overall horizontal movement of the movable arm 22, facilitating 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 be configured with other structures, depending on the specific circumstances.

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

[0052] Specifically, the fixed assembly 1 further 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. The opposite sides of the base 12 and the pressing block 11 are respectively provided with two positioning holes for inserting the positioning pins. During installation, the two positioning pins are first press-fitted into the two positioning holes of the base 12, then the positioning of the special-shaped metal pipe 101 is completed, and finally the pressing block 11 is installed with the base 12 through the positioning pins, thereby completing the positioning of the pressing block 11 and the base 12. The one-side two-pin positioning method is used. Since this positioning method is a mature technology, it will not be described in detail here.

[0053] Specifically, the fixed assembly 1 further includes at least two connecting pieces 14. Along the force applying direction of the force applying 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 piece 14 passes through a through hole and a fixing hole opposite to the through hole in sequence, thereby realizing the connection and fixation of the pressing block 11 and the base 12. The fixing hole is preferably a threaded hole, and the connecting piece 14 is preferably a threaded pin. By connecting the threaded pin to the through hole and the threaded fixing hole in sequence, the connection and fixation of the pressing block 11 and the base 12 are realized. In this embodiment, four connecting pieces 14 are provided. Of course, in other embodiments, two, three, five or more connecting pieces 14 can also be provided, which is determined according to the actual situation.

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

[0055] The embodiment also provides a use method of the special-shaped metal pipe 101 cutting device. The steps include:

[0056] The special-shaped metal pipe 101 is positioned in the second fixing groove, the pressing block 11 is positioned and connected with the base 12 through the positioning pin, the special-shaped metal pipe 101 is fixed in the cavity between the pressing block 11 and the base 12, and the pressing block 11 and the base 12 are connected and fixed through the connecting piece 14; the lower cutter head 4 sleeved with the second spring 6 is installed in the second mounting hole; the movable arm 22 is installed, the first movable arm 221 is inserted into the first mounting groove 111, the second movable arm 223 is inserted into the second mounting groove 121, and the limiting piece 13 is sequentially inserted into the first limiting hole and the second limiting hole; the upper cutter head 3 sleeved with the first spring 5 is installed in the first mounting hole; and the force applying rod 21 is sequentially inserted into the third mounting hole and the fourth mounting hole and abuts against the upper cutter head 3.

[0057] The force applying rod 21 rotates downward, the first movable arm 221 is driven to move upward through the threaded rotation of the force applying rod 21 and the fourth mounting hole, so that the second movable arm 223 is driven to move upward, the upper cutter head 3 and the lower cutter head 4 cut at the same time, the force applying rod 21 stops rotating after abutting against the pressing block 11, the upper cutter head 3 and the lower cutter head 4 reach the target cutting position, and the cutting of the special-shaped metal pipe 101 is completed.

[0058] The force applying rod 21 is reversely rotated, 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 special-shaped metal pipe 101 after cutting is taken out.

[0059] The special-shaped metal pipe 101 cutting device has the advantages of convenient operation, uniform stress of the special-shaped metal pipe 101 during cutting, convenient operation, small external force of an operator acting on the force applying rod 21, cutting of the special-shaped metal pipe 101, reduced labor intensity of the operator, timely replacement of the cutter head, and reduced loss caused by scrapping of the whole device.

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

Claims

1. A cutting apparatus for cutting a profiled metal tube, characterized in that, The utility model provides a cutting device for special-shaped metal pipe, which comprises a fixing assembly, a force applying assembly, an upper cutter and a lower cutter, the fixing assembly is used for fixing the special-shaped metal pipe, and the force applying assembly is used for driving the upper cutter and the lower cutter to cut off the special-shaped metal pipe. The fixing assembly comprises a pressing block and a base, the pressing block is installed on the base, the special-shaped metal pipe is fixed between the pressing block and the base, and first and second installation holes are oppositely arranged in the pressing block and the base along the height direction of the fixing assembly; the upper cutter is installed in the first installation hole, and the lower cutter is installed in the second installation hole. The force applying assembly comprises a force applying rod and a movable arm, the movable arm comprises a first movable arm, a second movable arm and a connecting arm, the first movable arm and the second movable arm are connected through the connecting arm, and first and second installation grooves are respectively arranged on the pressing block and the base along a direction perpendicular to the length direction of the special-shaped metal pipe; the first movable arm is inserted into the first installation groove, and the second movable arm is inserted into the second installation groove; along the force applying direction of the force applying rod, the pressing block and the first movable arm are respectively provided with third and fourth installation holes coaxial with the first installation hole, and the force applying rod passes through the third and fourth installation holes in sequence and abuts against the upper cutter. When the force applying rod is rotated and moved downward, the first movable arm is driven to move upward through the threaded rotation of the force applying rod and the fourth installation hole, thereby driving the second movable arm to move upward, and the upper cutter and the lower cutter cut simultaneously.

2. The apparatus according to claim 1, wherein The fixing assembly further comprises a limiting piece, and the base and the second movable arm are movably connected through the limiting piece.

3. The apparatus according to claim 2, wherein 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 piece is partially fixed in the second limiting hole, and the remaining part of the limiting piece is movably arranged in the first limiting hole.

4. The apparatus according to claim 3, wherein The fixing assembly further comprises two positioning pins, and the pressing block and the base are connected and fixed through the positioning pins.

5. The apparatus according to claim 4, wherein The fixing assembly further comprises at least two connecting pieces, the pressing block is provided with at least two through holes along the force applying direction of the force applying rod, the base is provided with a fixing hole opposite to each through hole, and each connecting piece passes through one through hole and one fixing hole in sequence to be connected and fixed.

6. The apparatus according to claim 5, wherein The force applying assembly further comprises a force applying handle, and the force applying rod is provided with a connecting hole at an end away from the upper cutter along the radial direction of the force applying rod; the force applying handle passes through the connecting hole and is fixedly connected with the force applying rod.

7. The apparatus according to claim 6, wherein The utility model further comprises a first spring and a second spring, the first spring is sleeved outside the upper cutter, and the second spring is sleeved outside the lower cutter.

8. The apparatus according to claim 7, wherein The upper cutter is matched with the shape of the outer wall of the special-shaped metal pipe, and the lower cutter is a wedge-shaped body.

9. The apparatus according to claim 8, wherein Along the length direction of the special-shaped metal pipe, opposite sides of the pressing block and the base are respectively provided with first and second fixing grooves, the first and second fixing grooves form cavities, and the cavities are used for fixing the special-shaped metal pipe.

10. A method of using a profiled metal tube cutting device according to claim 9, characterized by the steps of The utility model discloses a cutting device for special-shaped metal pipe, which comprises a fixing assembly, a force applying assembly, an upper cutter and a lower cutter, the fixing assembly is used for fixing the special-shaped metal pipe, and the force applying assembly is used for driving the upper cutter and the lower cutter to cut off the special-shaped metal pipe. Position the special-shaped metal pipe in the second fixing groove, position and connect the pressing block and the base through the positioning pin, fix the special-shaped metal pipe in the cavity between the pressing block and the base, and connect and fix the pressing block and the base through the connecting piece; Install 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 mounting groove, insert the second movable arm into the second mounting groove, and sequentially insert the limiting pieces into the first limiting hole and the second limiting hole; Install the upper cutter head sleeved with the first spring in the first mounting hole; Thread the force applying rod through the third mounting hole and the fourth mounting hole and abut against the upper cutter head; Rotate the force applying rod to move downward, drive the first movable arm 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 simultaneously cut the upper cutter head and the lower cutter head; the force applying rod stops rotating after abutting against the pressing block, the upper cutter head and the lower cutter head reach the target cutting position, and the cutting of the special-shaped metal pipe is completed; Reverse rotate the force applying rod, and loosen and separate the upper cutter head and the lower cutter head under the elastic force of the first spring and the second spring; Remove the connecting piece, separate the pressing block and the base, and take out the cut special-shaped metal pipe.

Images