An automatic perforating and threading numerical control thermal cutting machine

Abstract

The present invention discloses an automatic perforating and wire-feeding numerically controlled thermal cutting machine. The structure of the automatic perforating and wire-feeding numerically controlled thermal cutting machine mainly includes: a numerically controlled mainframe, a chassis, a column frame, a cross beam, an upper machine head assembly, a lower machine head assembly, a material pressing frame structure, an X-axis structure, a Y-axis structure, a Z-axis structure, etc. It has automatic functions such as perforating, wire-feeding, heating, cutting, and wire-receiving. At the same time, by applying numerical control technology, it can achieve precise punching of soft plastics, flexible wire-feeding and wire-receiving. When in use, it feeds the wire, and when not in use, it receives the wire. It can skillfully install the heating wire, eliminate the characteristic that the heating wire will elongate when heated, and data can be input in the numerical control computer controller of the numerically controlled mainframe. It can also adjust the tension of the heating wire, greatly reducing the labor intensity of workers, and realizing continuous automatic cutting production to improve production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of CNC numerical control hot wire thermal cutting industry, and particularly relates to a thermal cutting of soft plastics such as EPS (polystyrene), EPE (polyethylene), PU (sponge), etc., and belongs to an automatic piercing and wire feeding numerical control thermal cutting machine in thermal cutting processing machinery. Background Art

[0002] At present, due to the wide application of soft plastics such as EPS (polystyrene), EPE (polyethylene), and PU (sponge), the market demand for such products is large. When these products are put into use, they need to be cut at positions such as their inner cores to form modular materials with a core-removing structure. Currently, the cutting and processing methods for these soft plastics generally include using hydraulic stamping machines, numerical control cutting machines, and manual cutting production methods. However, these methods basically have many defects, specifically as follows: (1) Hydraulic stamping machines use large-tonnage presses combined with die cutting to cut and form products. The die has a very limited adaptation range for the material thickness, generally not exceeding 5 cm in thickness. Moreover, the die cutting method will compress the soft plastic material and cause non-directional deformation, resulting in a change in the shape of the product, and it is basically not suitable for fine processing. (2) Numerical control cutting machines. Due to the wide application of numerical control equipment, the thermal processing machinery of numerical control equipment mainly uses laser and hot knife methods. Since the processing of soft plastic materials has high requirements for temperature control, when using laser cutting, the temperature generated by the laser is too high, which easily causes the soft plastic material to melt and pile up. Moreover, when the processing thickness is too large, the laser spot focusing deviation is large. For example, when cutting soft plastic materials more than 20 cm thick, the laser-cut pattern will deviate severely. Currently, the processing method of the hot knife mainly uses a heating alloy bar with a diameter of 4 mm to make a die. During cutting, due to the too large diameter of the heating alloy bar, the accuracy is too poor, the plane is rough and uneven. When cutting products more than 20 cm thick, the hot knife often bends, and it cannot accurately penetrate the soft plastic material, resulting in the inability to process fine patterns. (3) Manual cutting production requires using two templates to clamp the soft plastic material, then setting a small hole tube in the frame, threading a heating wire with a diameter of 0.5 mm, and cutting along the template pattern. In this way, when cutting soft plastics, it is impossible to accurately pierce holes, many patterns cannot make suitable templates, the labor intensity is large, the material density is too large to produce, and it can only be first cut into thin slices and small pieces and then processed, which is time-consuming and has low productivity.

[0003] Therefore, it is necessary to make certain improvements to the cutting methods and technologies of existing soft plastic materials. Summary of the Invention

[0004] The object of the present invention is to overcome the above-mentioned disadvantages of the prior art and provide an automatic perforating and threading numerical control thermal cutting machine, which has the advantages of simple and reasonable structure, complete functions, low energy consumption, and high productivity. The structure of the automatic perforating and threading numerical control thermal cutting machine mainly includes: a numerical control mainframe, a chassis, a column frame, a cross beam, an upper head assembly, a lower head assembly, a material pressing frame structure, an X-axis structure, a Y-axis structure, and a Z-axis structure, etc.; mainly, an X-axis rolling conveyor belt table for conveying soft plastic in the X-axis direction is formed by installing a chassis workbench surface on the chassis, a lower head assembly is installed at the lower position of the chassis, column frames are installed on both sides of the chassis to support columns and cross beams, a material pressing frame structure composed of a material pressing frame and a material pressing rolling shaft is installed between the two column frames, an upper head assembly is installed on the cross beam, and it moves in the Y-axis direction synchronously with the sliding direction of the lower head assembly. The upper and lower head assemblies are controlled by a numerical control computer assembly in the numerical control mainframe; the upper head assembly has a perforating cylinder driving a perforating hollow tube to perforate the soft plastic. After the perforating hollow tube passes through the soft plastic material, the strong magnetic suction head of the lower head assembly sucks and tightens the perforated bullet head to complete the threading action, and a heating wire is connected to the top of the perforated bullet head. Then, the perforating cylinder of the upper head assembly retracts the perforating hollow tube, so that a heating wire is exposed between the upper and lower head assemblies. The tension of the heating wire is adjusted, the heating wire is energized to generate heat, and the data of the X and Y axes are output to complete the precise cutting of the soft plastic material; after the cutting is completed, the lower head assembly will release the heating wire and the perforated bullet head, and the upper head assembly will recover the heating wire and the perforated bullet head; repeat the above operations to continue the cutting operation on the next soft plastic pattern. In the Y-axis direction, multiple upper and lower heads can be installed according to the size of the soft plastic material to form synchronous production; in the X-axis direction, it can run continuously according to the length of the soft plastic material until all the soft plastic is produced and cut. The punching depth of the perforating hollow tube for the soft plastic material can be configured with an appropriate length according to the soft plastic, and by using the action of the perforating cylinder, it can easily pass through the soft plastic material with a thickness of more than 50 cm.

[0005] The technical solution adopted by the present invention to solve its technical problems is: an automatic perforating and threading numerical control thermal cutting machine, including a chassis, column frames symmetrically arranged on both upper sides of the chassis and shaped like direction frames, columns installed on the column frames, a cross beam installed between the tops of the two columns, and a numerical control mainframe installed on the cross beam.

[0006] The top of the chassis is provided with a front conveyor belt and a rear conveyor belt to form a chassis workbench surface. The front conveyor belt and the rear conveyor belt are synchronously conveyed in the same direction to form conveyance in the X-axis direction. There is a gap between the front conveyor belt and the rear conveyor belt. A lower Y-axis guide rail corresponding to the gap is provided at the lower position of the chassis, and a lower head assembly corresponding to the gap is provided on the lower Y-axis guide rail.

[0007] An upper Y-axis guide rail is installed on the cross beam, and an upper head assembly is installed on the upper Y-axis guide rail. The upper head assembly is located directly above the lower head assembly and moves synchronously with the lower head assembly in the Y-axis direction.

[0008] Z-axis guide rails are provided on both inner sides of the column frame. A pressing frame is installed on the four Z-axis guide rails of the two column frames. The pressing frame is placed flat and is located above the front conveyor belt and the rear conveyor belt. A plurality of pressing rolling shafts are provided on the pressing frame and are arranged in the Z-axis direction.

[0009] The upper head assembly includes an upper head frame seat installed through an upper Y-axis slider on the upper Y-axis guide rail, a perforating cylinder and a wire control motor installed on the upper head frame seat, a perforating hollow tube installed at the power output end of the bottom of the perforating cylinder, a funnel-shaped conductive block located at the bottom of the perforating hollow tube, a perforating bullet head movably placed in the funnel-shaped conductive block and partially extending into the bottom of the perforating hollow tube, a heating wire fixedly connected to the top of the perforating bullet head and placed in the perforating hollow tube, an insulating traction wire fixedly connected to the top of the heating wire, and a wire winding wheel for winding and unwinding the insulating traction wire and driven by the wire control motor.

[0010] The lower head assembly includes an F-shaped seat plate installed through a lower Y-axis slider on the lower Y-axis guide rail, two wire clamping cylinders installed on both sides of the top of the F-shaped seat plate and arranged oppositely, an upper concave diamond plate and a lower concave diamond plate respectively installed on the inner sides of the two wire clamping cylinders and arranged staggeredly up and down, a wire passing opening provided on the top of the F-shaped seat plate and located between the two concave diamond plates and allowing the perforating bullet head and the heating wire to pass through, a downward pulling cylinder installed at the middle position of the F-shaped seat plate and corresponding to directly below the wire passing opening, a strong magnetic suction head installed at the power output end of the top of the downward pulling cylinder. The funnel-shaped conductive block, the upper concave diamond plate or the lower concave diamond plate are all connected with energized wires, and wire clamping insulating plates are installed between the wire clamping cylinders and the upper concave diamond plate and the lower concave diamond plate respectively.

[0011] The front conveyor belt and the rear conveyor belt of the automatic perforating and wire threading numerical control thermal cutting machine form the base frame workbench surface, that is, the mechanical workbench surface. The front conveyor belt and the rear conveyor belt are driven in the same direction to realize the conveyance of soft plastic materials in the X-axis direction. The lower head assembly is installed on the lower Y-axis slider, and the upper head assembly is installed on the upper Y-axis slider. The upper head assembly and the lower head assembly are synchronously moved in the Y-axis direction through the lower Y-axis guide rail and the upper Y-axis guide rail, etc. When the perforating hollow tube and the perforating bullet head on the upper head assembly are pressed down in place, the pulling cylinder rises, the strong magnetic chuck holds the perforating bullet head, and then the pulling cylinder pulls down the perforating bullet head. The two wire clamping cylinders act respectively to push out the upper concave diamond plate and the lower concave diamond plate to move towards each other until they clamp the heating wire. The diamond-shaped opening formed by the approach of the upper concave diamond plate and the lower concave diamond plate continuously shrinks to a small hole smaller than the diameter of the heating wire and catches the perforating bullet head to prevent the perforating bullet head from coming out. The energized wire is connected to the upper concave diamond plate and the lower concave diamond plate. The upper concave diamond plate and the lower concave diamond plate are made of concave diamond-shaped metal plates. When the upper concave diamond plate and the lower concave diamond plate are opened, a large enough diamond-shaped inner hole is formed between the two diamond plates to allow the strong magnetic chuck to move upward. When closed, they can clamp the heating wire and ensure that the heating wire is automatically corrected and positioned due to drilling deviation.

[0012] Further, the funnel-shaped conductive block is a hollow structure that penetrates up and down. The hollow structure of the funnel-shaped conductive block is in the shape of a funnel with a narrow upper part and a wide lower part. The inner side of the upper part of the hollow structure is also provided with a heating wire wire groove for stabilizing the heating wire on the funnel-shaped conductive block. The perforating bullet head includes a cylindrical head in the upper part and a diamond-shaped perforating head in the lower part. The bottom of the diamond-shaped perforating head is in a pointed shape. The diameter of the upper part of the hollow structure of the funnel-shaped conductive block is smaller than the distance of the stroke of the wire pressing cylinder.

[0013] Further, a wire adjusting guide rail is also provided on the upper head frame seat. A wire adjusting slider seat is movably installed on the wire adjusting guide rail. A wire adjusting guiding lower pulley for guiding the insulating traction wire is installed on the wire adjusting slider seat. A wire adjusting spring is provided above the wire adjusting guiding pulley at the upper part of the wire adjusting guide rail. A wire adjusting guiding upper pulley for guiding the insulating traction wire is fixedly installed at the top of the perforating cylinder.

[0014] Further, a perforating guide rail is also provided on the upper head frame seat. A perforating slider block is movably installed on the perforating guide rail. The cylinder rod of the perforating cylinder is fixedly installed with the perforating slider seat. The top of the perforating hollow tube is fixedly installed with the perforating slider seat through a perforating insulating plate.

[0015] Further, a lower Y-axis motor is also provided at the lower part of the F-shaped seat plate. The top power output end of the lower Y-axis motor is installed with a lower Y-axis synchronous pulley. The lower Y-axis synchronous pulley is connected to the lower Y-axis slider through a lower Y-axis synchronous belt. A lower Y-axis insulating plate is also provided between the lower Y-axis guide rail and the base frame.

[0016] Furthermore, a Z-axis slider fixedly mounted on the press frame is movably mounted on the Z-axis guide rail, a Z-axis motor is mounted on the top of the column frame, an upper Z-axis synchronous wheel is mounted on the power output end of the Z-axis motor, a lower Z-axis synchronous wheel is mounted on the column below the upper Z-axis synchronous wheel, and a Z-axis synchronous belt connected to the Z-axis slider is mounted between the upper Z-axis synchronous wheel and the lower Z-axis synchronous wheel; the press frame is a square frame structure, and a press rolling shaft is mounted on the inner side of the press frame through a rolling shaft elliptical seat. The column frames on both sides of the base frame are a left column frame and a right column frame, and the inner sides of the four corners of the left column frame and the right column frame are both mounted with Z-axis guide rails, the press frame moves up and down along the Z-axis guide rails through the Z-axis slider, the press frame is driven by the Z-axis motor, rolling shaft elliptical seats are mounted on both sides of the wire pressing frame, and both ends of the press rolling shaft are placed in the rolling shaft elliptical seats. The wire crimping stand uses multiple pressing rolling shafts to press the soft plastic material to ensure that it does not move or deviate when running in the X-axis direction, and to ensure its own weight pressure when the soft plastic material has a small thickness change; more importantly, when the perforating cylinder retracts the perforating hollow tube, the CNC host can be used to control the Z-axis direction to run, and the pressing rolling shaft rises to the top of the ellipse to form a hard position, thereby pressing the soft plastic material to prevent the soft plastic from loosening. When cutting, it can be adjusted to use the weight of the pressing rolling shaft to press the soft plastic material to ensure stable movement in the X-axis direction, which can be widely adapted to the cutting production of materials of different thicknesses.

[0017] Furthermore, a wire pressing cylinder connected to the funnel-shaped conductive block is installed at the lower end of the perforated guide rail, and a wire pressing insulating block is provided between the wire pressing cylinder and the funnel-shaped conductive block.

[0018] Furthermore, two upper and lower cross beams are installed on the column, each cross beam is installed with a separate upper Y-axis guide rail, and an upper Y-axis motor is installed on the cross beam, and the upper Y-axis motor is connected to the upper head frame seat through an upper Y-axis synchronous belt.

[0019] Furthermore, the chassis is provided with an X-axis motor, the two ends of the front conveyor belt are respectively provided with a front driving shaft and a front driven shaft, the two ends of the rear conveyor belt are respectively provided with a rear driving shaft and a rear driven shaft, the front driving shaft and the rear driving shaft are respectively provided with a front driving shaft synchronous wheel and a rear driving shaft synchronous wheel, the front driving shaft synchronous wheel and the rear driving shaft synchronous wheel are connected to the X-axis motor through the X-axis synchronous belt, and the front driving shaft, the front driven shaft, the rear driving shaft and the rear driven shaft are all installed on the top of the chassis through the bearing seat. Through the X-axis synchronous belt, it is connected to the X-axis motor, and the transmission is in the same direction. The lower Y-axis structure is installed below.

[0020] Furthermore, the diameter of the heating wire is 0.2-0.5 mm. The heating wire with a diameter of 0.2-0.5 mm has the advantages of low energy consumption and can achieve precise processing.

[0021] The CNC mainframe is equipped with a CNC computer controller. The upper head component and the lower head component in the Y-axis direction operate synchronously. A heating wire is connected between the upper and lower head components, and together with the conveyor belt in the X-axis direction, it forms X and Y two-dimensional data to complete the cutting production of two-dimensional graphic products.

[0022] In summary, the automatic perforation and wire threading CNC hot cutter of the present invention is simply and reasonably designed, with automated functions such as automatic perforation, wire threading, heating, cutting, and wire collection. At the same time, by applying CNC technology, it can achieve precise punching, flexible wire threading and wire collection for soft plastics. The wire is loaded when in use and collected when not in use. It can skillfully install the heating wire, eliminate the characteristic that the heating wire will elongate when heated, and data can be input in the CNC computer controller of the CNC mainframe. It can also adjust the tension of the heating wire, greatly reducing the labor intensity of workers and realizing continuous automatic cutting production, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the automatic perforation and wire threading CNC hot cutter in Embodiment 1;

[0024] Figure 2 is a front view schematic diagram of the automatic perforation and wire threading CNC hot cutter in Embodiment 1;

[0025] Figure 3 is Figure 2 an enlarged schematic diagram at A in

[0026] Figure 4 is a left view schematic diagram of the automatic perforation and wire threading CNC hot cutter in Embodiment 1;

[0027] Figure 5 is a front view schematic diagram of the lower head component;

[0028] Figure 6 is a top view schematic diagram of the lower head component;

[0029] Figure 7 is a structural diagram when the upper concave diamond plate and the lower concave diamond plate are opened correspondingly;

[0030] Figure 8 is a left view schematic diagram of the upper head component;

[0031] Figure 9 is a front view schematic diagram of the upper head component;

[0032] Figure 10 is a schematic diagram of the connection and installation of the funnel-shaped conductive block and the wire pressing cylinder;

[0033] Figure 11 is a schematic diagram of the connection and installation of the funnel-shaped conductive block and the perforating bullet head;

[0034] Figure 12 It is a schematic diagram of the connection and installation of a perforated hollow tube and a perforated bullet nose;

[0035] Figure 13 It is a schematic diagram of the connection and installation of a perforated bullet nose and a heating wire;

[0036] The component numbers in the attached drawings are as follows: numerical control mainframe 1; chassis 2; column frame 5; cross beam 6; column 9; front conveyor belt 21; rear conveyor belt 22; front driving shaft 23; front driven shaft 24; shaft bearing seat 25; rear driving shaft 26; rear driven shaft 27; front driving shaft synchronous pulley 28; X-axis synchronous belt 29; X-axis motor 30; lower head assembly 31; F-shaped seat plate 32; lower Y-axis insulating plate 33; lower Y-axis guide rail 34; lower Y-axis slider 35; lower Y-axis synchronous belt 36; lower Y-axis synchronous pulley 37; lower Y-axis motor 38; wire clamping cylinder 41; upper concave diamond plate 42; strong magnetic chuck 43; lower pulling cylinder 44; lower concave diamond plate 45; pressure frame 51; pressure rolling shaft 52; Z-axis guide rail 53; Z-axis slider 54; Z-axis synchronous belt 55; Z-axis upper synchronous pulley 56; Z-axis motor 57; rolling shaft elliptical seat 58; Z-axis lower synchronous pulley 59; upper Y-axis guide rail 61; upper Y-axis slider 62; upper Y-axis motor 63; Y-axis synchronous belt 64; upper head assembly 65; wire adjusting guiding upper pulley 71; perforating cylinder 72; wire controlling motor 73; wire coiling wheel 74; perforating sliding seat block 75; perforating insulating plate 76; perforated hollow tube 77; perforating guide rail 78; insulating traction wire 79; wire pressing insulating block 80; heating wire 81; wire pressing cylinder 82; funnel-shaped conductive block 83; perforated bullet nose 84; wire adjusting slider seat 85; wire adjusting spring 86; wire adjusting guiding lower pulley 87; wire adjusting guide rail 88; upper head frame seat 91; wire threading port 92; heating wire wire groove 93; cylindrical head 94; diamond-shaped perforating head 95; rear driving shaft synchronous pulley 96; wire clamping insulating plate 97. Detailed implementation mode

[0037] Embodiment 1

[0038] An automatic perforating and wire feeding numerically controlled thermal cutting machine described in this Embodiment 1, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 、 Figure 12 and Figure 13As shown in the figure, it includes a chassis 2, column frames 5 which are symmetrically arranged on both sides of the upper part of the chassis and are in the shape of a direction frame, columns 9 installed on the column frames, a cross beam 6 installed between the tops of the two columns, and a numerical control mainframe 1 installed behind the cross beam.

[0039] The top of the chassis is provided with a front conveyor belt 21 and a rear conveyor belt 22 to form the working surface of the chassis. The front conveyor belt and the rear conveyor belt are synchronously conveyed in the same direction to form X-axis direction conveyance. There is a gap between the front conveyor belt and the rear conveyor belt. At the position below the chassis, there is a lower Y-axis guide rail 34 corresponding to the gap, and a lower head assembly 31 corresponding to the gap is arranged on the lower Y-axis guide rail; this gap is a certain empty space left between the front and rear conveyor belts.

[0040] An upper Y-axis guide rail 61 is installed on the cross beam, and an upper head assembly 65 which is located directly above the lower head assembly and moves synchronously with the lower head assembly in the Y-axis direction is installed on the upper Y-axis guide rail.

[0041] Z-axis guide rails 53 are provided on both inner sides of the column frames. A pressing frame 51 which is horizontally placed and located above the front conveyor belt and the rear conveyor belt is installed on the four Z-axis guide rails of the two column frames. A plurality of pressing rolling shafts 52 arranged along the Z-axis direction are provided on the pressing frame.

[0042] The upper head assembly includes an upper head frame seat 91 installed through an upper Y-axis slider 62 and the upper Y-axis guide rail, a perforating cylinder 72 and a wire control motor 73 installed on the upper head frame seat, a perforating hollow tube 77 installed on the power output end at the bottom of the perforating cylinder, a funnel-shaped conductive block 83 located at the bottom of the perforating hollow tube, a perforating bullet head 84 which is movably placed in the funnel-shaped conductive block and partially extends into the bottom of the perforating hollow tube, a heating wire 81 fixedly connected and installed with the top of the perforating bullet head and placed in the perforating hollow tube, an insulating traction wire 79 fixedly connected with the top of the heating wire, and a wire winding wheel 74 which winds and unwinds the insulating traction wire and is controlled and driven by the wire control motor. There are a perforating cylinder and a wire control motor installed in the upper part of the upper head assembly, and the wire control motor is installed with a wire winding wheel.

[0043] The described lower head assembly includes an F-shaped seat plate 32 installed through a lower Y-axis slider 35 and a lower Y-axis guide rail, two wire clamping cylinders 41 installed on both sides of the top of the F-shaped seat plate and arranged oppositely, an upper concave diamond plate 42 and a lower concave diamond plate 45 respectively installed on the inner sides of the two wire clamping cylinders and arranged staggeredly up and down, a wire threading opening 92 provided on the top of the F-shaped seat plate and located between the two concave diamond plates and allowing the perforated bullet head and the heating wire to pass through, a lower pull cylinder 44 installed at the middle position of the F-shaped seat plate and corresponding to the position directly below the wire threading opening, a strong magnetic suction head 43 installed on the power output end of the top of the lower pull cylinder, a funnel-shaped conductive block, and the upper concave diamond plate or the lower concave diamond plate are all connected with energized wires. A wire clamping insulating plate 97 is installed between the wire clamping cylinders and the upper concave diamond plate and the lower concave diamond plate respectively. The lower head assembly is installed on the lower Y-axis slider. The wire clamping cylinders are installed on the upper part of the F-shaped seat plate. The wire clamping cylinders install the wire clamping insulating plate, the upper concave diamond plate and the lower concave diamond plate. The wire clamping insulating plate realizes the insulation between the wire clamping cylinders and the upper concave diamond plate and the lower concave diamond plate. A lower pull cylinder is installed in the middle of the F-shaped seat plate. The top of the cylinder rod of the lower pull cylinder installs a strong magnetic suction head. When the lower pull cylinder moves and extends upward, the strong magnetic suction head sucks the perforated bullet head. When the lower pull cylinder pulls back, the wire clamping cylinders push the upper concave diamond plate and the lower concave diamond plate to move closer to each other and finally clamp the heating wire to complete the automatic wire feeding action. The energized wires are connected to the upper concave diamond plate and the lower concave diamond plate.

[0044] The Y-axis movement of the upper and lower head assemblies and the lower head assembly is controlled by the numerical control host to move synchronously. The cylinder rod of the perforating cylinder drives the perforating hollow tube to press downward, pushing the heating wire and the perforated bullet head into the lower head assembly. The wire control motor is controlled by the numerical control program of the numerical control host to adjust the winding and unwinding of the heating wire. The funnel-shaped conductive block of the upper head assembly is connected to the power supply. Any one of the upper concave diamond plate or the lower concave diamond plate of the lower head assembly is connected to the power supply. The perforating hollow tube penetrates the soft plastic material with the heating wire, and is energized to generate heat. The numerical control host controls to complete the production.

[0045] In the present Embodiment 1, the funnel-shaped conductive block has a hollow structure that penetrates up and down. The hollow structure of the funnel-shaped conductive block is in the shape of a funnel with a narrow upper part and a wide lower part. On the inner side of the upper part of the hollow structure, there is also a heating wire wire groove 93 for stabilizing the heating wire on the funnel-shaped conductive block. The perforating bullet head includes a cylindrical head 94 at the upper part and a diamond-shaped perforating head 95 at the lower part. The bottom of the diamond-shaped perforating head is in a pointed shape. The diameter of the upper part of the hollow structure of the funnel-shaped conductive block is smaller than the distance of the stroke of the wire pressing cylinder. The perforating bullet head passes through the funnel-shaped conductive block. The funnel-shaped conductive block stabilizes the punching direction. After the perforating hollow tube is retracted, the funnel-shaped conductive block stabilizes the heating wire in the heating wire wire groove to form stable wire collection. The food structure of the perforating bullet head ensures the punching speed, improves the direction stability, and effectively prevents deviation. The cylindrical head at the top of the perforating bullet head can enter the perforating hollow tube and be tightly connected to the perforating hollow tube. The funnel-shaped conductive block can control the initial point where the perforating hollow tube enters the soft plastic material, implement precise positioning. After the automatic perforating and wire feeding action is completed; after cutting, the heating wire is recycled, the perforating bullet head quickly returns, and the funnel-shaped hollow structure of the funnel-shaped conductive block can achieve effective guiding to ensure that the perforating bullet head accurately returns to the perforating hollow tube.

[0046] In the present Embodiment 1, a wire adjusting guide rail 88 is further provided on the upper machine head frame seat. A wire adjusting slider seat 85 is movably installed on the wire adjusting guide rail. A wire adjusting guiding lower pulley 87 for guiding the insulating traction wire is installed on the wire adjusting slider seat. An upper wire adjusting spring 86 is provided above the wire adjusting guiding lower pulley at the upper part of the wire adjusting guide rail. A wire adjusting guiding upper pulley 71 for guiding the insulating traction wire is fixedly installed at the top of the perforating cylinder. The wire winding wheel of the wire controlling motor installs the insulating traction wire. The insulating traction wire is connected to the heating wire through the wire adjusting guiding lower pulley and the wire adjusting guiding upper pulley, and then connected to the perforating bullet head. The wire adjusting guiding lower pulley is installed on the wire adjusting slider seat. The wire adjusting spring is placed above the wire adjusting slider seat. The wire adjusting slider seat moves along the wire adjusting guide rail, and the wire adjusting slider compresses the wire adjusting spring, thereby realizing the use of the wire adjusting spring to ensure the tension of the heating wire; through the control of the wire controlling motor and the action with the wire adjusting spring, different spring tensions can be obtained.

[0047] The wire controlling motor in the present Embodiment 1 controls the insulating traction wire, performs digital wire feeding, and achieves a micro-tension. This micro-tension is equivalent to the weight of the wire adjusting slider seat and the wire adjusting guiding lower pulley, which is beneficial for the strong magnetic suction head to suck and pull down the perforating bullet head; during cutting, the wire controlling motor winds the wire, and the wire adjusting slider seat compresses the wire adjusting spring. The more the wire is wound, the greater the spring force, realizing digital control.

[0048] In the present Embodiment 1, a perforation guide rail 78 is further provided on the upper machine head frame base. A perforation sliding block seat 75 is movably installed on the perforation guide rail. The cylinder rod of the perforation cylinder is fixedly installed with the perforation sliding block seat. The top of the perforation hollow tube is fixedly installed with the perforation sliding block seat through a perforation insulating plate 76. The cylinder rod of the perforation cylinder is connected to the perforation sliding block seat, and the perforation sliding block seat is connected to the perforation insulating plate and the perforation hollow tube. Under the action of the perforation cylinder, the perforation sliding block seat and the perforation hollow tube move along the perforation guide rail. When moving downward, the perforation hollow tube penetrates the soft plastic material; the perforation insulating plate realizes the insulation between the perforation hollow tube and the perforation sliding block seat, that is, the insulation between the heating wire and the perforation sliding block seat can be realized.

[0049] In the present Embodiment 1, a lower Y-axis motor 38 is further provided at the lower part of the F-shaped seat plate. A lower Y-axis synchronous pulley 37 is installed at the top power output end of the lower Y-axis motor. The lower Y-axis synchronous pulley is connected to the lower Y-axis slider through a lower Y-axis synchronous belt 36. A lower Y-axis insulating plate 33 is further provided between the lower Y-axis guide rail and the chassis. The F-shaped seat plate and the like are installed below the empty gap between the front and rear conveyor belts. The Y-axis insulating plate is insulated from the chassis. The lower Y-axis guide rail and the lower Y-axis slider form an engaging connection of the track. The F-shaped seat plate is installed on the lower Y-axis slider, and the Y-axis synchronous belt is fixed on the F-shaped seat plate.

[0050] In the first embodiment, a Z-axis slider 54 fixedly installed with a pressure frame is movably installed on the Z-axis guide rail. A Z-axis motor 57 is installed on the top of the column frame. A Z-axis upper synchronous pulley 56 is installed on the power output end of the Z-axis motor. A Z-axis lower synchronous pulley 59 is provided on the column at a position below the Z-axis upper synchronous pulley. A Z-axis synchronous belt 55 connected to the Z-axis slider is provided between the Z-axis upper synchronous pulley and the Z-axis lower synchronous pulley. The pressure frame is of a square frame structure, and a pressure rolling shaft is installed inside the pressure frame through a rolling shaft elliptical seat 58. Z-axis guide rails are installed on the inner sides of the four corners of the column frames on both sides of the chassis. Under the action of the Z-axis synchronous belt, the Z-axis upper synchronous pulley and the Z-axis motor, the pressure frame moves up and down along the Z-axis guide rail through the Z-axis slider, and the pressure frame is driven by the Z-axis motor. Rolling shaft elliptical seats are installed on both inner sides of the wire pressing frame, and both ends of the pressure rolling shaft are placed into the rolling shaft elliptical seats. The Z-axis motor is controlled by the numerical control program of the numerical control host, and the pressure frame is controlled by the Z-axis motor. When recovering after punching, the action of pressing the material is completed to prevent the soft plastic material from moving when the perforated hollow tube is retracted, ensuring the stable movement in the X-axis direction. Moreover, the movement of the pressure frame in the Z-axis direction is controllable, suitable for use with various material thicknesses. The pressure rolling shaft is installed on the rolling shaft elliptical seat. When the pressure frame descends, the pressure rolling shaft is stuck on the top of the rolling shaft elliptical seat to form the function of pressing the material. When the pressure frame ascends to half of the elliptical height of the rolling shaft elliptical seat, the weight of the pressure rolling shaft presses the soft plastic material, and the soft plastic material can roll smoothly even with a small thickness change. The setting of the pressure frame and the like ensures the stable cutting of the soft plastic material in the X-axis direction. After cutting is completed, the pressure frame ascends and leaves the soft plastic material, facilitating the placement of a new soft plastic material and then pressing again for the next time.

[0051] In the first embodiment, a wire pressing cylinder 82 connected and installed with a funnel-shaped conductive block is further installed at the lower end of the perforation guide rail. A wire pressing insulating block 80 is further provided between the wire pressing cylinder and the funnel-shaped conductive block. The wire pressing cylinder and the funnel-shaped conductive block are installed at the lower end of the perforation guide rail. The wire pressing cylinder, the wire pressing insulating plate and the funnel-shaped conductive block are all installed below the perforation guide rail. The perforation bullet head passes through the funnel-shaped conductive block, and the funnel-shaped conductive block stabilizes the punching direction. After the perforated hollow tube is retracted, the wire pressing cylinder pushes the funnel-shaped conductive block forward to fix the heating wire on the funnel-shaped conductive block, ensuring good conductivity.

[0052] In the first embodiment, two cross beams arranged up and down are installed on the column. A separate upper Y-axis guide rail is installed on each cross beam. An upper Y-axis motor 63 is installed on the cross beam, and the upper Y-axis motor is connected to the upper machine head frame seat through an upper Y-axis synchronous belt 64.

[0053] In this Embodiment 1, an X-axis motor 30 is provided on the chassis. At both ends of the front conveyor belt, a front driving shaft 23 and a front driven shaft 24 are respectively provided. At both ends of the rear conveyor belt, a rear driving shaft 26 and a rear driven shaft 27 are respectively provided. A front driving shaft synchronous pulley 28 and a rear driving shaft synchronous pulley 96 are respectively provided on the front driving shaft and the rear driving shaft. Both the front driving shaft synchronous pulley and the rear driving shaft synchronous pulley are connected to the X-axis motor through an X-axis synchronous belt 29. The front driving shaft, the front driven shaft, the rear driving shaft, and the rear driven shaft are all installed on the top of the chassis through bearing seats 25. For the transmission of the workbench surface in the X-axis direction, a certain gap is left between the front and rear conveyor belts. The front driving roller and the rear driving roller are connected to the X-axis motor through the X-axis synchronous belt, realizing the same-direction transmission of the front and rear conveyor belts.

[0054] In this Embodiment 1, the diameter of the heating wire is 0.2 - 0.5 millimeters.

[0055] In this Embodiment 1, the front conveyor belt, the rear conveyor belt, etc. achieve the cutting movement in the X-axis direction, and are widely suitable for various material lengths.

[0056] In this Embodiment 1, the upper Y-axis slider and the lower Y-axis slider, etc. synchronously achieve the movement in the Y-axis direction, driving the lower head assembly and the upper head assembly to achieve the cutting movement in the Y-axis direction.

[0057] In this Embodiment 1, the perforation of the automatic perforating and wire-feeding numerical control thermal cutting machine is realized by a perforating cylinder, or can also adopt methods such as motor drive, and the same perforation effect as that in Embodiment 1 can be obtained.

[0058] In this Embodiment 1, the upper Y-axis structure composed of components such as the upper Y-axis slider in the Y-axis direction and the lower Y-axis structure composed of components such as the lower Y-axis slider can be provided with multiple upper head assemblies and lower head assemblies at the same time, and the same effect as that in Embodiment 1 can also be obtained.

[0059] In this Embodiment 1, the performance comparison table of the automatic perforating and wire-feeding numerical control cutting machine of the present invention and three conventional methods in the prior art is shown in Table 1:

[0060] Table 1

[0061]

[0062]

[0063] As can be seen from Table 1, the automatic perforation and wire threading CNC cutting machine technology of the present invention is more optimized in terms of material size than the conventional production methods, with basically no limitation on material size, suitable for cutting most existing materials; while the three conventional production methods have more limitations on material size. The automatic perforation and wire threading CNC cutting machine of the present invention is applicable to materials with different densities, whether high-density, medium-density or low-density materials, suitable for cutting most existing materials; while there are many problems with the three conventional production methods in terms of material sealing, such as uncontrollable cutting melt width, damage to the tool die, high material defect rate, inability to produce, slow production speed, etc. In the process flow of the automatic perforation and wire threading CNC cutting machine of the present invention, it has excellent performance such as no limitation on the size of the large materials to be cut, no need to use a mold, realization of automatic perforation method and numerical control, wide applicability to different material cutting, high precision, short loading and unloading time, fast average cutting speed and high production capacity, all of which are superior to the three conventional production methods in the traditional way. Moreover, the technology of the present invention can save materials during the core extraction process, while the other three conventional methods cannot achieve material saving.

[0064] In Example 1 of the present invention, the comparison table of the production of the automatic perforation and wire threading CNC cutting machine of the present invention with the three conventional methods of the prior art is shown in Table 2:

[0065] Table 2

[0066]

[0067]

[0068]

[0069]

[0070] As can be seen from Table 2, the automatic perforation and wire threading CNC cutting machine of the present invention has excellent performance and effects in terms of loading time, perforation time, average cutting time, goods damage and material saving, all of which are superior to the three conventional production methods in the traditional way.

[0071] In summary, the structure design of the automatic perforation and wire threading CNC thermal cutting machine in Example 1 of the present invention is simple and reasonable, with automatic functions such as perforation, wire threading, heating, cutting, and wire collection. It effectively uses the numerical control system for control, and forms automatic cutting production by using cylinder punching, automatic wire threading, two-dimensional graphic digitization, etc., which is both safe and fast, and accurate and efficient.

[0072] The above is only a preferred embodiment of the present invention, and does not impose any form of limitation on the structure of the present invention. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An automatic perforating and threading numerical control thermal cutting machine, characterized in that, It includes a chassis (2), column frames (5) respectively installed on both sides of the upper part of the chassis and symmetrically arranged in the shape of a direction frame, columns (9) installed on the column frames, a cross beam (6) installed between the tops of the two columns, and a numerical control mainframe (1) installed on the cross beam; - The top of the chassis is provided with a front conveyor belt (21) and a rear conveyor belt (22) to form the chassis workbench surface. The front conveyor belt and the rear conveyor belt are synchronously conveyed in the same direction to form X-axis direction conveyance. There is a gap between the front conveyor belt and the rear conveyor belt. A lower Y-axis guide rail (34) is provided at the position below the chassis corresponding to the gap, and a lower head assembly (31) corresponding to the gap is provided on the lower Y-axis guide rail; - An upper Y-axis guide rail (61) is installed on the cross beam, and an upper head assembly (65) located directly above the lower head assembly and moving in the Y-axis direction synchronously with the lower head assembly is installed on the upper Y-axis guide rail; - Z-axis guide rails (53) are provided on both inner sides of the column frames. A pressing frame (51) placed flat and located above the front conveyor belt and the rear conveyor belt is installed on the four Z-axis guide rails of the two column frames. A plurality of pressing rolling shafts (52) arranged in the Z-axis direction are provided on the pressing frame; - The upper head assembly includes an upper head frame base (91) installed on the upper Y-axis guide rail through an upper Y-axis slider (62), a perforating cylinder (72) and a wire control motor (73) installed on the upper head frame base, a perforating hollow tube (77) installed on the power output end of the bottom of the perforating cylinder, a funnel-shaped conductive block (83) located at the bottom of the perforating hollow tube, a perforating bullet head (84) movably placed in the funnel-shaped conductive block and partially extending into the bottom of the perforating hollow tube, a heating wire (81) fixedly connected to the top of the perforating bullet head and placed in the perforating hollow tube, an insulating traction wire (79) fixedly connected to the top of the heating wire, and a wire winding wheel (74) for taking in and paying out the insulating traction wire and driven by the wire control motor; - The lower head assembly includes an F-shaped seat plate (32) installed on the lower Y-axis guide rail through a lower Y-axis slider (35), two clamping wire cylinders (41) installed on both sides of the top of the F-shaped seat plate and arranged oppositely, an upper concave diamond plate (42) and a lower concave diamond plate (45) respectively installed on the inner sides of the two clamping wire cylinders and arranged staggeredly up and down, a wire passing port (92) provided on the top of the F-shaped seat plate and located between the two concave diamond plates and allowing the perforating bullet head and the heating wire to pass through, a lower pulling cylinder (44) installed at the middle position of the F-shaped seat plate and corresponding to directly below the wire passing port, a strong magnetic suction head (43) installed on the power output end of the top of the lower pulling cylinder. The funnel-shaped conductive block, the upper concave diamond plate or the lower concave diamond plate are all connected with energized wires. Clamping wire insulating plates (97) are installed between the clamping wire cylinders and the upper concave diamond plate and the lower concave diamond plate respectively.

2. The automatic perforating and threading numerical control thermal cutting machine according to claim 1, characterized in that, The described funnel-shaped conductive block has a hollow structure that penetrates up and down. The hollow structure of the funnel-shaped conductive block is in the shape of a funnel with a narrow upper part and a wide lower part. On the inner side of the upper part of the hollow structure, there is also a heating wire wire groove (93) for stabilizing the heating wire on the funnel-shaped conductive block. The described perforated bullet head includes a cylindrical head (94) at the upper part and a diamond-shaped perforated head (95) at the lower part. The bottom of the diamond-shaped perforated head is in a pointed shape. The diameter of the upper part of the hollow structure of the funnel-shaped conductive block is smaller than the distance of the stroke of the wire pressing cylinder.

3. The automatic perforating and threading numerical control thermal cutting machine according to claim 2, characterized in that, On the upper head frame base, there is also a wire adjusting guide rail (88). A wire adjusting slider base (85) is movably installed on the wire adjusting guide rail. A wire adjusting guide pulley (87) for guiding the insulating traction wire is installed on the wire adjusting slider base. Above the wire adjusting guide pulley, there is a wire adjusting spring (86) at the upper part of the wire adjusting guide rail. At the top of the perforating cylinder, a wire adjusting upper guide pulley (71) for guiding the insulating traction wire is fixedly installed.

4. The automatic perforating and threading numerical control thermal cutting machine according to claim 3, characterized in that, On the upper head frame base, there is also a perforating guide rail (78). A perforating slider block (75) is movably installed on the perforating guide rail. The cylinder rod of the perforating cylinder is fixedly installed with the perforating slider block. The top of the perforating hollow tube is fixedly installed with the perforating slider block through a perforating insulating plate (76).

5. The automatic perforating and threading numerical control thermal cutting machine according to claim 4, characterized in that, At the lower part of the F-shaped seat plate, there is also a lower Y-axis motor (38). At the top power output end of the lower Y-axis motor, a lower Y-axis synchronous pulley (37) is installed. The lower Y-axis synchronous pulley is connected to the lower Y-axis slider through a lower Y-axis synchronous belt (36). There is also a lower Y-axis insulating plate (33) between the lower Y-axis guide rail and the chassis.

6. The automatic perforating and threading numerical control thermal cutting machine according to claim 5, characterized in that, A Z-axis slider (54) fixedly installed with the material pressing frame is movably installed on the Z-axis guide rail. A Z-axis motor (57) is installed on the top of the column frame. At the power output end of the Z-axis motor, a Z-axis upper synchronous pulley (56) is installed. On the column, there is a Z-axis lower synchronous pulley (59) at a position below the Z-axis upper synchronous pulley. A Z-axis synchronous belt (55) connected to the Z-axis slider is provided between the Z-axis upper synchronous pulley and the Z-axis lower synchronous pulley. The material pressing frame is of a square frame structure. The inner side of the material pressing frame is provided with a material pressing rolling shaft through a rolling shaft elliptical seat (58).

7. The automatic perforating and threading numerical control thermal cutting machine according to claim 6, characterized in that, At the lower end of the perforating guide rail, there is also a wire pressing cylinder (82) connected and installed with the funnel-shaped conductive block. There is also a wire pressing insulating block (80) between the wire pressing cylinder and the funnel-shaped conductive block.

8. The automatic perforating and threading numerical control thermal cutting machine according to claim 7, characterized in that, On the column, there are two cross beams arranged up and down. On each cross beam, a separate upper Y-axis guide rail is installed. An upper Y-axis motor (63) is installed on the cross beam. The upper Y-axis motor is connected to the upper head frame base through an upper Y-axis synchronous belt (64).

9. The automatic perforating and threading numerical control thermal cutting machine according to claim 8, characterized in that, An X-axis motor (30) is provided on the described chassis. The two ends of the front conveyor belt are respectively provided with a front driving shaft (23) and a front driven shaft (24). The two ends of the rear conveyor belt are respectively provided with a rear driving shaft (26) and a rear driven shaft (27). A front driving shaft synchronous pulley (28) and a rear driving shaft synchronous pulley (96) are respectively provided on the front driving shaft and the rear driving shaft. Both the front driving shaft synchronous pulley and the rear driving shaft synchronous pulley are connected to the X-axis motor through an X-axis synchronous belt (29). The front driving shaft, the front driven shaft, the rear driving shaft and the rear driven shaft are all installed on the top of the chassis through bearing seats (25).

10. The automatic perforating and threading numerical control thermal cutting machine according to claim 9, characterized in that, The diameter of the described heating wire is 0.2 - 0.5 millimeters.

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