Double-tool-bit cutting device and cutting method thereof

Abstract

The double-tool-bit cutting device comprises a main frame, a first sliding rail and a second sliding rail are symmetrically arranged along an opening of the main frame, a third sliding rail and a fourth sliding rail are slidably arranged between the first sliding rail and the second sliding rail, and sliding block bearings are slidably arranged on the third sliding rail and the fourth sliding rail correspondingly; the sliding block bearing is connected with an operation table so that the operation table can slide. A first moving assembly is arranged on the operation table, the output end of a first gear rack of the first moving assembly is connected with a second moving assembly to drive the second moving assembly to rotate, and the two ends of the second moving assembly are connected with cutting tool bits correspondingly so that the cutting tool bits can rotate for cutting. According to the double-tool-bit cutting device, rectangular steel plates can be cut by moving the cutting tool bits in the X-axis direction and the Y-axis direction, the cutting tool bits can rotate to cut the steel plates through the transmission bearings, round steel plates are obtained, the cutting quality of rectangular and round steel plate cutting is improved, and the working efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of marine oil engineering technology, and particularly relates to a double-blade cutting device and its cutting method. Background Technology

[0002] In the construction of offshore oil platforms, liquefied natural gas modular plants and other engineering projects, their steel structures are all frame structures formed by connecting multiple layers of deck plates with ring steel plates. The ring steel plates and columns (steel pipes) intersect to form a frame structure. At the junction, the steel plates or steel pipes need to be cut with single or double bevels, and the structural frame is connected and fixed by welding. Therefore, a lot of cutting and beveling work and positioning and cutting of plates or pipes are required.

[0003] In the past, when cutting steel plates or making holes and beveling round pipes, a single cutter head was used for cutting in one direction. This single cutter head was connected to a cutting carriage, and the carriage's straight rail was used to perform multiple cutting in different directions. The circular cutting process used a circular steel gauge, and a single cutting cutter head was connected to the circular steel rail to cut the steel plate.

[0004] This cutting method has the following main disadvantages: (1) During the process of cutting straight edges of steel plates, the direction of the straight rail needs to be changed multiple times to change the cutting direction. The multiple changes are time-consuming and will also increase the error caused by cutting. The cutting quality and cutting efficiency cannot be guaranteed. (2) When cutting the circular reinforcing steel plate, place the pointed steel needle at the center of the ring steel plate. The depth marked at the center is about 1 mm. Cut in circles. The steel needle is easy to detach from the center, causing the cut to detach from the ring surface. Therefore, the cutting quality cannot be guaranteed, and the subsequent rework is large.

[0005] Therefore, there is an urgent need to design a dual-blade cutting device to solve the problems mentioned above. Summary of the Invention

[0006] To address the technical problems mentioned in the background art, such as the need to change the direction of the straight rail multiple times to alter the cutting direction during the straight-edge cutting of steel plates, and the tendency for the steel needle to detach from the center and cause the cut to fall off the annular surface when cutting circular reinforcing steel plates in a circular manner, a double-blade cutting device is provided to solve the problems of beveling steel plates, as well as cutting square and circular steel plates.

[0007] To achieve the above objectives, the specific technical solution of the dual-blade cutting device and cutting method of the present invention is as follows: A dual-blade cutting device includes a main frame, with a first slide rail and a second slide rail symmetrically arranged along the opening of the main frame. A third slide rail and a fourth slide rail are slidably arranged between the first and second slide rails. A slider bearing is slidably arranged on the third and fourth slide rails, and an operating table is connected to the slider bearing to allow the operating table to slide. A first moving component is arranged on the operating table. The output end of the first gear rack of the first moving component is connected to a second moving component to drive the second moving component to rotate. Cutting blades are connected to both ends of the second moving component to allow the cutting blades to rotate and cut.

[0008] Furthermore, the first moving component includes a transmission bearing, the output end of the first gear rack is connected to the inner ring of the transmission bearing, and the outer ring of the transmission bearing is connected to the second moving component, so that the second moving component rotates around the first gear rack.

[0009] Furthermore, the first moving component also includes a gear block connected to the operating table, which has holes corresponding to the gear block. The first gear rack is screwed onto the gear block so that the gear block drives the first gear rack to move up and down.

[0010] Furthermore, the second moving component includes a second rack and pinion holder, which is connected to the outer ring of the transmission bearing.

[0011] Furthermore, the second moving component also includes two clamps that connect the cutting head to both ends of the second gear rack.

[0012] Furthermore, the clamp is screwed onto the second gear rack, and the clamp can be moved to adjust the spacing between the cutting heads.

[0013] Furthermore, the main frame opening is rectangular.

[0014] Furthermore, the main frame is connected to casters via columns to allow the main frame to move horizontally.

[0015] A dual-blade cutting method, wherein when the second rack and pinion is parallel to the third and / or fourth slide rail, the operating table moves along the first and second slide rails so that the cutting blades spaced on the second rack and pinion cut the steel plate along the X-axis direction; Rotate the second rack frame perpendicular to the third and / or fourth slide rails, and move the operating table along the third and fourth slide rails so that the cutting heads spaced on the second rack frame cut the steel plate along the Y-axis direction. The second rack and pinion rotates around the transmission bearing, causing the cutting blades, spaced apart on the second rack and pinion, to rotate and cut the steel plate.

[0016] The dual-blade cutting device of the present invention has the following advantages: Rectangular steel plates can be cut by moving the cutting head along the X and Y axes. A transmission bearing allows the cutting head to rotate and cut the steel plate into a circular shape, improving the cutting quality of both rectangular and circular steel plates and increasing work efficiency. This application allows for the simultaneous cutting of rectangular and circular steel plates without changing equipment, simplifying operation and reducing production costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the dual-blade cutting device of the present invention; Figure 2 This is a schematic diagram showing the connection of the cutting heads of the dual-head cutting device of the present invention; Figure 3 This is a schematic flowchart of the dual-blade cutting method of the present invention.

[0018] Explanation of markings in the diagram: 1. Main frame; 2. Operating table; 3. First slide rail; 4. Second slide rail; 5. Third slide rail; 6. Fourth slide rail; 7. First moving component; 71. First gear rack; 72. Transmission bearing; 8. Second moving component; 81. Second gear rack; 82. Clamp; 9. Slider bearing; 10. Cutting head; 11. Casters. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0021] The following is a reference to the appendix. Figure 1 To be continued Figure 3 The present invention describes a dual-blade cutting device.

[0022] like Figure 1 and Figure 2As shown, the dual-blade cutting device of the present invention includes a main frame 1, with a first slide rail 3 and a second slide rail 4 symmetrically arranged along the opening of the main frame 1. A third slide rail 5 and a fourth slide rail 6 are slidably arranged between the first slide rail 3 and the second slide rail 4. A slider bearing 9 is slidably arranged on the third slide rail 5 and the fourth slide rail 6, and an operating table 2 is connected to the slider bearing 9 to allow the operating table 2 to slide. A first moving component 7 is arranged on the operating table 2. The output end of the first gear rack 71 of the first moving component 7 is connected to a second moving component 8 to drive the second moving component 8 to rotate. Cutting blades 10 are connected to both ends of the second moving component 8 to allow the cutting blades 10 to rotate and cut.

[0023] In a preferred embodiment, the main frame 1 is formed by welding a channel-shaped aluminum alloy. The upper part of the channel-shaped aluminum alloy has a rectangular opening, and the bottom of the main frame 1 is vertically connected to a column. The column has screw holes so that the casters 11 can be connected to the main frame 1 by bolts, thereby realizing the overall movement of the main frame 1.

[0024] Slider blocks are connected to both ends of the third slide 5 and the fourth slide 6, so that the third slide 5 and the fourth slide 6 can move parallel to the first slide 3 and the second slide rail 4. Limiting holes are opened on the sliders, and multiple screw-connecting limiting holes are spaced apart on the first slide 3 and the second slide 4 along the length direction of the first slide 3 and the second slide 4. By connecting the limiting holes and the corresponding screw-connecting limiting holes with bolts, the operating table 2 can be fixed above the position to be cut.

[0025] Furthermore, such as Figure 1 As shown, the first moving component 7 includes a transmission bearing 72, the output end of the first gear rack 71 is welded to the inner ring of the transmission bearing 72, and the outer ring of the transmission bearing 72 is connected to the second moving component 8 so that the second moving component 8 can rotate freely around the first gear rack 71.

[0026] Preferably, the first moving component 7 further includes a gear block, which is welded above the operating table 2. The operating table 2 has a hole corresponding to the gear block at its center. The first gear rack 71 is screwed onto the gear block so that the gear block drives the first gear rack 71 to move up and down.

[0027] Furthermore, such as Figure 1 As shown, the second moving component 8 includes a second gear rack 81, which is welded to the outer ring of the transmission bearing 72.

[0028] Preferably, the second moving component 8 further includes two clamps 82, through which the cutting head 10 is spacedly connected to the second gear rack 81.

[0029] Furthermore, the clamp 82 is screwed onto the second gear rack 81. By moving the clamp 82 to adjust the spacing between the cutting blades 10, the cutting size can be changed.

[0030] The working principle of the dual-blade cutting method in this invention is as follows: When cutting rectangular steel plates: S1. Hoist the steel plate to be cut onto the pre-set pad, mark the square cutting line to be cut, and cut through holes on any two symmetrical faces of the square cutting line. S2. Move the second gear rack 81 directly above the steel plate to be cut and fix it. Slide the third slide rail 5 and the fourth slide rail 6 along the first slide rail 3 and the second slide rail 4. Slide the operating table 2 along the third slide rail 5 and the fourth slide rail 6 to adjust the operating table 2 to be directly above the square cutting line. Adjust the distance between the double flame cutting heads 10 on the second gear rack 81 to be consistent with the distance between the symmetrical cutting through holes on both sides. Fix the cutting direction with the lock nut. S3. Adjust the relative position of the second gear rack 81 and the steel plate to be cut. First, adjust the cutting nozzle on the double flame cutting head 10 to a cutting angle of 0 degrees and perpendicular to the steel plate. Then, adjust the effective cutting distance between the double flame cutting head 10 and the square steel plate to be cut, and slide the operating table to make the double flame cutting head 10 and the X-axis of the square cutting line consistent. By adjusting the center of the double flame cutting head 10 with the center of the through hole of the square part of the square steel plate, opening the nozzle flame valve and adjusting it to a neutral flame, unscrewing the cutting oxygen valve, and adjusting the nozzle to make a straight square cutting line from the through hole of the square part of the square steel plate to be cut, so as to form the nozzle cutting from the through hole of the square part to the center of the straight square cutting line. Then, the sliding operating table 2 moves along the first slide rail 3 and the second slide rail 4, so that the double flame cutting head 10 is in a straight cutting state on the square cutting line, and performs two straight cuts in the X-axis direction until the two straight cuts in the X-axis direction are completed, so as to form two straight cuts in the X-axis direction. S4. Loosen the locking nut, rotate the transmission bearing 72, adjust the double flame cutting head to the Y-axis direction, and move the operating table 2 to keep the double flame cutting head at a distance above the square cutting line on the Y-axis. S5. The operating table 2 moves along the third slide rail 5 and the fourth slide rail 6 to achieve movement in the Y-axis direction, and adjusts the angle of the cutting nozzle of the double flame cutting head 10 to a cutting angle of 0 degrees and perpendicular to the steel plate, and adjusts the angle of the cutting nozzle of the double flame cutting head 2 to a cutting angle of 0 degrees and perpendicular to the steel plate. S6. Adjust the effective cutting distance between the double flame cutting head 10 and the square steel plate to be cut, and slide the operating table 2 to make the double flame cutting head 10 consistent with the Y-axis travel path of the square cutting line; By adjusting the center of the double flame cutting head 10 with the center of the through hole of the square part of the square steel plate, opening the nozzle flame valve and adjusting it to a neutral flame, unscrewing the cutting oxygen valve, and adjusting the nozzle to make a straight square cutting line from the through hole of the square part of the square steel plate to be cut, so as to form the nozzle cutting from the through hole of the square part to the center of the straight square cutting line. Then, slowly slide the operating table 2 along the third slide rail 5 and the fourth slide rail 6 so that the double flame cutting head is in a straight cutting state on the square cutting line, and performs two straight cuts in the Y-axis direction until the two straight cuts in the Y-axis direction are completed, so as to form two straight cuts in the Y-axis direction, and thus form the finished square steel plate after cutting.

[0031] When cutting a circular steel plate: S1. Hoist the steel plate to be cut onto the pre-set pad, mark the square cutting line to be cut, and cut through holes on any two symmetrical faces of the square cutting line. S2. Adjust the operating table 2 to be above the circular steel plate to be cut, and adjust the distance between the double flame cutting heads 10 to be consistent with the distance between the symmetrical cutting through holes on both sides of the circle. S3. Loosen the locking nut so that the second gear rack 81 can rotate freely around the transmission bearing 72. Adjust the cutting nozzle on the double flame cutting head 10 to a cutting angle of 0 degrees and perpendicular to the steel plate. Then adjust the effective cutting distance between the double flame cutting head 10 and the circular steel plate to be cut so that the double flame cutting head 10 and the inner cutting line of the circle are consistent. By adjusting the position of the dual-flame cutting head 10 and the through holes of the circular steel plate and the circular parts on both sides, the flame valve of the cutting nozzle is turned on and adjusted to a neutral flame. The cutting oxygen valve is turned off, and the cutting nozzle is adjusted to make a circular inner cutting line from the through hole of the circular part of the circular steel plate to be cut, so that the cutting nozzle cuts from the through hole of the circular part to the center of the circular inner cutting line. Then, the double flame cutting head 10 is slowly and uniformly rotated along the rotation path and kept stable, so that the double flame cutting head 10 is in a straight cutting state on the circular cutting line, and the inner ring straight cutting is carried out until the inner circle straight cutting is completed. The circular plate in the inner circle of the circular steel plate to be cut is separated from its inner ring and falls off to form a steel plate with a straight inner circle. S4. Based on the thickness of the steel plate to be cut, use a scribing method to draw two symmetrical inner ring straight edge wall thickness center curves at a local position on the inner ring straight edge of the circular steel plate to be cut, using a stone pencil and a steel ruler. S5. Adjust the angle of both blades of the dual flame cutting head 10 to a position between 38 degrees and 43 degrees with the bevel of the cutting surface; Adjust the position of the dual-flame cutting head 10 to the upper edge of the inner annular straight opening of the circular steel plate to be cut. Open the nozzle flame valve and adjust it to a neutral flame. Unscrew the cutting oxygen valve to form the nozzle cutting from the upper edge of the inner annular straight opening of the circular steel plate to the bevel position on the upper surface of the inner annular straight opening. When the dual-flame cutting head 10 cuts to the center curve of the wall thickness of the circular steel plate to be cut, stop moving the dual-flame cutting head. Then slowly and uniformly rotate the dual-flame cutting head along the rotation path and keep it stable so that both the dual-flame cutting heads 10 are cutting the bevel on the inner annular straight opening surface of the circular steel plate to be cut until the bevel on the upper surface of the inner annular straight opening of the steel plate to be cut is completed. Remove the bevel strips from the upper surface of the inner annular straight cut to form the inner annular straight cut upper surface bevel after the circular steel plate to be cut is cut; S6. Adjust the angles of both blades of the dual flame cutting head 10 to the edge of the bevel on the lower surface of the inner annular straight edge opposite to the cutting surface, with the bevel angle of the cutting surface being between 38 and 43 degrees. Adjust the position of the dual-flame cutting head 10 to the opposite cutting surface of the circular steel plate to be cut, at the edge of the bevel on the lower surface of the inner annular straight mouth. Open the nozzle flame valve and adjust it to a neutral flame. Unscrew the cutting oxygen valve to form the nozzle cutting from the lower edge of the inner annular straight mouth of the circular steel plate to the bevel position on the lower surface of the inner annular straight mouth. When the double flame cutting head 10 is adjusted to cut to the center curve of the wall thickness of the circular steel plate to be cut, the double flame cutting head is slowly and uniformly rotated along the rotation path and kept stable, so that the double flame cutting head 10 is cutting the reverse bevel of the inner circular straight edge of the circular steel plate to be cut, until the cutting of the bevel of the lower surface of the inner circular straight edge of the circular steel plate to be cut is completed. Remove the bevel strips from the lower surface of the inner circular straight cut to complete the bevel cutting of the inner circular straight cut of the circular steel plate after cutting. S7. Adjust the distance between the dual flame cutting heads 10 to match the distance between the two symmetrical cutting holes on the outer sides of the circle. S8. Adjust the cutting nozzle on the double flame cutting head 10 to a cutting angle of 0 degrees and perpendicular to the steel plate. Then adjust the effective cutting distance between the double flame cutting head and the circular steel plate to be cut so that the double flame cutting head and the circular outer cutting line travel the same way. S9. After adjusting the position of the double flame cutting head 10 and the through hole of the circular steel plate and the outer circular part, open the nozzle flame valve and adjust it to neutral flame. Unscrew the cutting oxygen valve and adjust the nozzle to make a straight outer circular cutting line from the through hole of the outer circular part of the circular steel plate to be cut, so that the nozzle cuts from the through hole of the outer circular part to the center of the straight outer circular cutting line. Then, the double flame cutting head 10 is slowly and uniformly rotated along the rotation path and kept stable, so that the double flame cutting head 10 is in a straight cutting state on the outer circular cutting line, and the outer circular straight cutting is carried out until the outer circular straight cutting is completed. The circular plate in the outer circle of the steel plate to be cut is separated from its inner ring and falls off to form the finished circular steel plate after cutting.

[0032] In this embodiment, during the cutting along the inner straight curve, the second gear rack 81 can rotate freely or be fixed for cutting via the transmission bearing 72, with a rotation angle of 360 degrees, and the double flame cutting head 10 can be adjusted to any cutting angle.

[0033] Depending on the cutting shape, the dual-blade omnidirectional cutting device can adapt to more cutting methods. During the cutting process in this embodiment, the cutting operator needs to adjust the cutting gas in time to avoid the dual-blade four-way cutting equipment being affected by external forces, causing the operating table 2 and the dual flame cutting blades to deviate from the set reference. At the same time, it is also necessary to focus on the cutting effect and travel speed of the dual flame cutting blades 10 during their movement, and correct any problems in time to ensure the cutting quality.

[0034] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A dual-blade cutting device, characterized in that, The device includes a main frame, with a first slide rail and a second slide rail symmetrically arranged along the opening of the main frame. A third slide rail and a fourth slide rail are slidably arranged between the first and second slide rails. A slider bearing is slidably arranged on the third and fourth slide rails, and an operating table is connected to the slider bearing to allow the operating table to slide. A first moving component is arranged on the operating table. The output end of the first gear rack of the first moving component is connected to a second moving component to drive the second moving component to rotate. Cutting heads are connected to both ends of the second moving component to allow the cutting heads to rotate and cut.

2. The dual-blade cutting device according to claim 1, characterized in that, The first moving component includes a transmission bearing, the output end of the first gear rack is connected to the inner ring of the transmission bearing, and the outer ring of the transmission bearing is connected to the second moving component so that the second moving component rotates around the first gear rack.

3. The dual-blade cutting device according to claim 2, characterized in that, The first moving component also includes a gear block connected to the operating table. The operating table has holes corresponding to the gear block, and the first gear rack is screwed onto the gear block so that the gear block drives the first gear rack to move up and down.

4. The dual-blade cutting device according to claim 1, characterized in that, The second moving component includes a second rack and pinion carrier, which is connected to the outer ring of the transmission bearing.

5. The dual-blade cutting device according to claim 4, characterized in that, The second moving component also includes two clamps that connect the cutting head to both ends of the second gear rack.

6. The dual-blade cutting device according to claim 5, characterized in that, The clamp is screwed onto the second gear rack. Moving the clamp allows for adjustment of the spacing between the cutting blades.

7. The dual-blade cutting device according to claim 1, characterized in that, The main frame opening is rectangular.

8. The dual-blade cutting device according to claim 1, characterized in that, The main frame is connected to casters via columns to allow it to move horizontally.

9. A dual-blade cutting method, comprising the dual-blade cutting apparatus as described in any one of claims 1-8, characterized in that, When the second rack frame is parallel to the third and / or fourth slide rails, the operating table moves along the first and second slide rails so that the cutting heads spaced on the second rack frame cut the steel plate in the X-axis direction. Rotate the second rack frame perpendicular to the third and / or fourth slide rails, and move the operating table along the third and fourth slide rails so that the cutting heads spaced on the second rack frame cut the steel plate along the Y-axis direction. The second rack and pinion rotates around the transmission bearing, causing the cutting blades, spaced apart on the second rack and pinion, to rotate and cut the steel plate.

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