353 results about "Plasma cutting" patented technology

The invention relates to the technical field of plasma cutting equipment, and discloses metal plate cutting equipment which comprises a bottom frame, a cutting mechanism, a cleaning mechanism and a collecting mechanism, the cleaning mechanism comprises a mounting plate, a polishing plate, an extrusion spring, an abutting plate and a water cooling assembly, and the mounting plate is slidably connected to the bottom frame through the collecting mechanism; a mounting groove is formed in the mounting plate, the extrusion springs are fixedly connected to the bottom and the top in the mounting groove, the abutting plate is fixedly connected to the extrusion springs, the grinding plate is detachably mounted on the abutting plate, the collecting mechanism is used for collecting slag falling during grinding, and the cutting mechanism is used for cutting a metal plate. The cleaning mechanism is arranged to be matched with the collecting mechanism, after the metal plate is cut, slag and burrs on the upper surface and the lower surface of the metal plate are polished, the burrs and the slag on the surface of the metal plate are removed and collected, and therefore the situation that the burrs and the slag remain on the surface of the metal plate, and the subsequent plate machining quality is affected is prevented.

The invention discloses a cutting and welding method for a rectangular frame steel member, which relates to the field of cutting and welding processes, and comprises the following steps: S1, selecting steel of a preset material, constructing a three-dimensional model according to the design size of a rectangular frame, inputting material parameters to a process database, and simulating the distribution of a welding temperature field and a stress field through simulation software, and the cutting allowance, the reverse deformation and the welding sequence scheme of the steel blank are output. According to the method, laser cutting and plasma cutting are accurately matched, parameter optimization of three-dimensional nesting software is combined, the cutting precision is improved, based on simulation preset reverse deformation, dynamic clamping of a self-adaptive tool and symmetrical welding of double robots are matched, and the diagonal deviation of a rectangular frame is reduced; and the flatness error is reduced through post-welding high-frequency induction correction, and the high-precision assembly requirement is met.

This invention discloses a metal pipe processing and cutting equipment and method, including a feeding clamping rotating assembly and a protective bearing kit. A plasma cutting mechanism connected by bolts is provided on one side of the upper part of the feeding clamping rotating assembly, and the metal pipe body is clamped on the inner side of the feeding clamping rotating assembly. The device mainly utilizes the output of a central motor to adjust the central gear, side gear, and flower-shaped lead screw, thereby adjusting the expansion block to a suitable radius. Since the rear and side elastic folding fabrics have an elastic folding structure, they can be adaptively adjusted to a suitable radius. Combined with the output of the electric rotating seat, upper rotating frame, and lower rotating frame, the bearing belt can be adjusted to a suitable taut length position as needed. This enhances the adjustment effect of the positioning adjustment component and the protective bearing kit, enabling the equipment to process products of multiple sizes.

The invention relates to the technical field of plasma cutting, and discloses an angle steel plasma cutting system for an angle steel tower, which comprises a main machine body, the main machine body comprises a clamping assembly, a protection mechanism is arranged outside the clamping assembly, the clamping assembly is used for clamping and fixing angle steel, and the angle steel penetrates through the clamping assembly and the protection mechanism; the protection mechanism comprises a supporting ring fixedly connected to the outer side of the clamping assembly, the outer portion of the supporting ring is rotationally connected with an outer protruding ring, and a grinding roller used for grinding the angle steel cutting end opening is arranged outside the outer protruding ring. The angle steel notch is scraped through the grinding roller, slag and burrs at the position of the angle steel notch are removed, the flatness of the position of the angle steel notch is guaranteed, the quality of the angle steel notch is improved, in the treatment process, the grinding roller is controlled to rotate, different cutting edges of the grinding roller are switched for cutting, and damage caused by long-time scraping of a single cutting edge is avoided; and the service life of the grinding roller is prolonged, and the slag and burr removing effect of the grinding roller is improved.

The utility model relates to the technical field of steel member processing, and provides a numerical control plasma groove cutting machine for processing steel members, which comprises a bearing table, a plasma cutting machine main body is assembled in the middle of one side of the bearing table, adjusting seats are fixedly connected to two ends of the top of the bearing table, and transmission screw rods are rotatably connected to the inner sides of the adjusting seats. One end of the adjusting seat is fixedly connected with a transmission motor, the output end of the transmission motor is fixedly connected with a transmission screw, the outer side of the transmission screw is in threaded connection with a guide frame, the top end of the guide frame is provided with a steel member carrying assembly, and the steel member carrying assembly comprises a supporting shaft rod, a carrying plate, a linear guide rail, a positioning plate, a linkage rod and a displacement piece. By means of the technical scheme, the problem that in the prior art, after a component is clamped, the contact position of the component and the working end of a cutting machine is difficult to adjust, and the overall machining efficiency is greatly affected is solved.

The invention discloses plasma cutting equipment for power distribution cabinet machining, and relates to the technical field of plasma cutting, the plasma cutting equipment comprises a machine tool, a cutting mechanism and a fixing mechanism, the cutting mechanism is arranged at the top of the machine tool, the fixing mechanism is arranged at the bottom of the cutting mechanism, and the cutting mechanism comprises an integrated end; the integrated end is arranged at the top of the machine tool, a top protection shell is arranged at the bottom of the integrated end, a rubber protection shell is arranged at the bottom of the top protection shell, and a bottom protection shell is arranged at the bottom of the rubber protection shell and is matched with large-range rotation of a main body gas pipe. On the premise of ensuring stable connection and good sealing of components, the arc angle is changed, the problem of uneven cutting lines caused by arc influence during cutting of concave-convex surface accessories of the power distribution cabinet is solved, the accurate matching tightness of the accessories is improved, and then the sealing performance of the power distribution cabinet is ensured.

The plasma cutting machine comprises a cutting machine table, two guide sliding rails are symmetrically arranged on the upper end face of the cutting machine table, guide sliding blocks are connected to the outer walls of the guide sliding rails in a sliding mode, and the upper end faces of the two guide sliding blocks are connected to the two ends of an installation frame. An electric module is slidably connected into the mounting frame, a cutting machine gun is arranged in the electric module, a plurality of conveying rollers are arranged on the portion, between the two guide sliding rails, of the upper end face of the cutting machine table, a circulating assembly is arranged at the bottom of the cutting machine table, and a clamping assembly is arranged on the rear side of the cutting machine table. The clamping assembly comprises a motor, a first synchronous wheel and a synchronous belt, the motor is fixedly arranged on the positioning plate, the output end of the motor is connected with the first synchronous wheel, hanging basket steel can be stably clamped and positioned, meanwhile, the device is suitable for fixing hanging baskets of different sizes and filtering and recycling a water source obtained after chippings are cleaned, and practicability is achieved.

The invention provides a voltage division control system and method for a numerical control plasma cutting machine, and the system comprises a man-machine interaction module which is used for receiving a voltage division ratio setting instruction inputted by a user; the signal acquisition module is used for acquiring a first voltage signal output by the plasma cutting machine; and the control module is used for determining the currently-adopted voltage division ratio according to the voltage division ratio setting instruction and processing the first voltage signal based on the currently-adopted voltage division ratio to obtain a second voltage signal, and the second voltage signal is used for being transmitted to a numerical control system of the plasma cutting machine. By the adoption of the method and device, the voltage division ratio does not need to be switched in the cutting machine, switching is flexible, and the method and device can be suitable for more different scenes.

The invention relates to the technical field of steel sheet pile welding machining, in particular to a welding device for steel sheet pile machining, which is characterized in that a positioning mechanism and a fitting mechanism are arranged on an L-shaped adjusting table, and a cutting mechanism is arranged on the fitting mechanism; the auxiliary guiding device capable of being matched with pile bodies of different specifications and sizes can be rapidly assembled to the end of the steel sheet pile, and multi-angle and multi-direction stable limiting guiding can be conducted on portable cutting tools such as a handheld plasma cutting gun through the auxiliary guiding device; an operator can drive a cutting tool to stably and continuously perform cutting along the irregular section contour of the steel sheet pile; in addition, workers can conveniently carry the auxiliary guiding device to quickly transfer the operation position, so that groove cutting can be directly carried out on site in a steel sheet pile storage yard, the tedious process of repeatedly transporting a large number of pile bodies to fixed large equipment is avoided, and the dependence on heavy special equipment is remarkably reduced.

The utility model discloses a non-magnetic steel plasma cutting device, which belongs to the technical field of plasma cutting, and comprises a working table and a plasma cutting equipment main body arranged above the working table, one side of the top end surface of the working table is provided with a through groove used for discharging high-temperature melt, and the other side of the top end surface of the working table is provided with a through groove used for discharging high-temperature melt. And a sliding rail is fixed to the other side of the top end face of the workbench, a water storage tank located below the through groove is installed in the side wall of the workbench in an embedded mode, dust collection devices are installed on the two sides of the top end face of the workbench, and lifting moving mechanisms are installed on the two sides of the bottom end face of the water storage tank in an embedded mode. Flame and molten liquid generated by the non-magnetic steel plasma cutting device fall into the water storage tank and are cooled through water in the water storage tank, the situation that the molten liquid is sputtered is avoided, meanwhile, a hydraulic rod in a mounting groove and rolling wheels at the bottom end of a lifting plate are used for supporting a water outlet groove, and the water outlet groove is more stable. And cooling water can be conveniently removed from the workbench in the water storage tank through a handle for replacement.

A same-frequency blowing system and working method belong to the technical field of square tube cutting. The system blows the square tube head and tail simultaneously while cutting, and the blowing device is linked with the cutting power supply, effectively saving energy. The system ensures that the tail blowing mechanism does not collide with the running square tube. When the square tube advances, the floating roller rotates around the rotating bearing after being pushed by the square tube, and turns to the lower side of the square tube. When the square tube is taken away, the floating roller reverses and rotates around the rotating bearing under the gravity of the weight. According to the dust collection mode of steel plate plasma cutting operation, the dust collector adopts frequency conversion control, blowing is added on one side of the smoke suction port, the smoke dust collection effect is improved, the electric energy is saved, the blowing distance is closer, the control is more sensitive, the effect is better, the smoke dust diffusion problem can be effectively solved, the environmental pollution is reduced, and the normal use of the equipment is ensured.

The invention provides a plasma cutting equipment control system which comprises a numerical control machine tool which comprises a computer terminal and a machine tool body, the computer terminal is used for issuing a first control instruction of the machine tool body and a second control instruction of plasma cutting equipment, and the machine tool body is used for receiving the first control instruction; the plasma cutting equipment is driven to move based on the first control instruction; the equipment main controller is used for receiving the second control instruction and issuing the process parameters to the execution controller based on the second control instruction; wherein the equipment main controller is communicated with the computer terminal through a digital communication interface; and the execution controller is used for controlling the technological parameters in the cutting process based on the technological parameters issued by the equipment main controller. Data transmission between the equipment main controller and the numerical control machine tool is realized through a standardized digital communication protocol, the real-time performance of multiple tasks can be guaranteed, the system universality is improved, and the task processing real-time performance and reliability are improved through a distributed control architecture.

The utility model discloses a kind of anti-collision plasma flame torch cutting torch, including cutting torch main body, collar group, swing disc and electrode group. Collar group is made of positioning ring and float ring, electrode group is arranged therebetween, float ring can cause electrode sheet separation when contact with external object, trigger alarm. Swing disc is movably sleeved in the outer periphery of cutting torch main body, multiple contact rods and isolation plates are arranged thereon;When longitudinal or oblique contact occurs, contact rod is contacted with barrier to cause swing, drives isolation plate to be inserted between electrode sheet, realizes disconnect detection. Isolation plate is connected with positioning ring by spring, with automatic reset function. The structure realizes 360 degrees omnidirectional lateral collision detection and longitudinal, oblique protection, with the advantages of fast response, simple structure, strong self-resetting capability, etc., suitable for collision sensing and safety control of cutting torch in plasma cutting operation.

The invention provides a manufacturing method of a small-spacing three-web box beam, which comprises the following steps of: S1, blanking and processing: cutting by adopting a numerical control flame and plasma cutting technology, blanking at high precision according to a design size, reserving a machining allowance and a groove form, and polishing after cutting; s2, assembling and positioning are conducted, specifically, components are assembled on the jig frame through the upside-down mounting technology, and positioning of a top plate is completed firstly; positioning an inner side web plate and a middle web plate; pre-penetrating positioning of U ribs, longitudinal beams and anchoring partition plates is sequentially completed on the middle web; and finally, positioning of the outer side web is completed. S3, bending position welding forming is conducted, specifically, a side web and a top plate are welded at a bending position; after flaw detection is qualified, middle webs and a top plate are fixed through downward welding; u-shaped ribs and longitudinal beams are welded and fixed in a bending manner; welding a bottom plate, and fixedly connecting the bottom plate with the middle web plate, the anchoring partition plate and the side web plate in a welding manner; finally, the stiffening ribs and the support base plate are welded and anchored; s4, flame cutting process allowance; and S5, sanding and coating are conducted, and manufacturing is completed. High-quality welding manufacturing is achieved, and the method is suitable for popularization.

The invention relates to a wear part for an arc torch, plasma torch or plasma cutting torch, characterised in that the wear part or at least one part or a region of the wear part consists of an alloy formed from silver and zirconium, silver and hafnium, or silver and zirconium and hafnium.

An apparatus may include a bracket having a post-tensioned cable tunnel and a pair of tabs configured to receive a post-tensioned cable and to prevent rotation of the bracket relative to the post-tensioned cable. An apparatus may include a plasma torch attachment member configured to releasably engage with the head of a plasma cutting torch of the type having a plasma cutting tip attached thereto, and to rotatably attach to the bracket such that the plasma cutting tip may be moved in an arc relative to the post-tensioned cable.

The invention discloses a plasma cutting device for a wharf mechanical steel plate, and relates to the technical field of plasma cutting, the plasma cutting device comprises a supporting header and a cutting unit, and the cutting unit comprises a cutting head transversely moving on the top surface of a supporting plate-shaped object. A plurality of supporting plate-shaped objects can independently move up and down, so that a foundation of a concession space is provided for movement of an isolation plate and a first inner sleeve bottom rod, and the upper surface and the lower surface of a steel plate are limited through a first guide wheel and a first-stage bottom supporting plate; the upper surface and the lower surface of the steel plate are limited by a plurality of second-stage pressing plates, guide wheels II, scraping blocks II and a second-stage bottom supporting plate, so that a cutting seam cut by a cutting head is supported and limited in sections, and the pulling of a large steel plate caused by the falling of a small steel bar which is gradually separated from the cutting process to the next half process is reduced; and the upper part, the lower part and the cutting surface of the steel plate are treated to be flat by combining with sequential treatment of a scraping block I, a separation plate, a first-stage grinding layer and a second-stage grinding layer.

The application relates to a plasma cutting machine for square rectangular tube machining in the technical field of cutting, which comprises a machine tool, a supporting assembly is installed on one side of the middle of the top of the machine tool, an X-axis transverse moving mechanism is arranged on the machine tool, a movable frame is installed at the moving end of the X-axis transverse moving mechanism, a Y-axis vertical moving mechanism is installed at the middle of the inner wall top of the movable frame, a lifting block is installed at the moving end of the Y-axis vertical moving mechanism, a mounting frame is movably arranged on the lifting block, and a buffer assembly is arranged between the mounting frame and the lifting block. The application is convenient for multi-angle machining of the square rectangular tube, improves the machining stability and efficiency, collects waste slag generated in the cutting process, avoids slag adhesion on the surface of the square rectangular tube and diffusion into the working environment, is convenient for cleaning the inside of the cutting machine, makes the working environment clean, guarantees normal use, can conveniently push down the square rectangular tube from the original pipe material, realizes the effect of convenient material stripping, and does not need manual intervention and is convenient to operate.

The invention discloses an argon arc welding and cutting all-in-one machine. A rack of the machine comprises a machining table, supporting columns and a portal frame. Longitudinal beams are arranged between every two adjacent supporting columns in a sliding mode. A Y-axis motion driving device is arranged on the longitudinal beam; the Y-axis motion driving devices are connected with the Z-axis motion driving device, and a portal frame is arranged between the two Y-axis motion driving devices; an X-axis motion driving device is arranged in the accommodating groove of the portal frame; a moving seat at the upper end of the portal frame is connected with an X-axis motion driving device; cam grooves are formed in the two sides of the movable base. A bearing is arranged in each cam groove in a sliding manner; a moving driving device at the upper end of the moving seat drives a bearing to move; the bearing is fixedly connected with a swinging mechanism; the swing mechanism is connected with the argon arc welding gun module and the plasma cutting gun module. According to the argon arc welding and cutting all-in-one machine, the argon arc welding process and the plasma arc cutting process can be completed on the machining table, the production efficiency can be remarkably improved, and the machining requirement of a high-precision workpiece can be better met.

The invention discloses a tool steel plasma cutting device and a using method, and relates to the technical field of cutting devices, the tool steel plasma cutting device comprises a base and a double-shaft driving assembly, a first assembling opening and a second assembling opening are formed in the side wall of the base, and the double-shaft driving assembly is connected into the first assembling opening and the second assembling opening. By installing the double-shaft driving assembly, the inner track and the outer track, stable annular cutting of tool steel through the double-shaft driving cutting head is achieved, multi-direction movement and multi-angle cutting of the cutting head are achieved, cutting flexibility and precision are improved, and the problems that when a traditional cutting device rotates in a single shaft mode, vibration is likely to be generated, consequently, the cutting face is rough, and cutting quality is poor are solved. And the complex machining requirements cannot be met.

The present invention provides a plasma cutting straight strip multi-parallel control system and control method, belonging to the field of plasma cutting technology. The control system includes: a CNC host, a plasma cutting unit, a multi-parallel straight strip cutting system, and a plasma height adjustment controller; the multi-parallel straight strip cutting system is used to obtain the on / off status of at least one plasma cutter in the plasma cutting unit and send a control signal to the CNC host based on the on / off status; the CNC host is used to control the walking cutting state of the plasma cutting unit based on the control signal sent by the multi-parallel straight strip cutting system; and the plasma height adjustment controller is used to control the height of the cutting gun head of the plasma cutter in the plasma cutting unit based on the control signal sent by the CNC. By connecting the multi-parallel straight strip cutting system to multiple plasma cutters, multiple plasma cutters can be controlled to perform cutting movements synchronously, effectively improving cutting efficiency and reducing production costs.

The invention provides a cable fitting aluminum material plasma cutting machine, and relates to the technical field of plasma cutting equipment. An n-shaped lifting frame is vertically mounted at the upper end of the cutting frame in a sliding mode, the lifting frame is fixed to the upper end of the cutting frame through abutting bolts, and the height of the lifting frame is adjusted according to the height of an operator; the cutting table is fixedly installed in the middle of the lifting frame, and brackets are evenly installed on the lifting frame on the two sides of the cutting table at intervals in a matched mode. The lifting frame can be vertically adjusted according to the height of an operator and is fixed through the abutting bolt, stable supporting is formed by combining the lifting frame with the cutting frame, and the operation comfort and the man-machine adaptability are greatly improved. The bracket with the carrier rollers is arranged, so that aluminum materials are conveyed more smoothly; the clamping plate driven by the clamping air cylinder in the clamping frame and the fixing plate cooperate to reliably clamp the aluminum material, and position deviation in the cutting process is effectively avoided.

The utility model discloses a plasma cutting gun head capable of improving insulation. The plasma cutting gun head comprises a positive electrode copper piece, a negative electrode copper piece, an insulating piece, a negative electrode copper pipe, a front end insulating piece, a flow guide pipe, an electrode, an electrode nozzle, a diverter, an outer nozzle, a heat shrink tube with glue, a connecting nut and sealing insulation glue. An insulating tube is also included; the insulating part is screwed on the cathode copper part through a thread; the positive electrode copper piece is screwed on the insulating piece through a thread; after the insulating tube at one end is prefabricated on the cathode copper tube, the sealing insulation paste is poured into a gap between the cathode copper piece and the anode copper piece and solidified; after the sealing insulation paste is completely cured, bending the cathode copper pipe; then the heat shrink tube with the adhesive is installed on the bent cathode copper tube, and one end of the heat shrink tube with the adhesive is tightly attached to the cured sealing insulation rubber plane; and the coincidence length between the adhesive heat shrink tube and the insulating tube is not less than 10mm. And the reliability and the stability of the high-frequency plasma cutting gun head are improved.

The application discloses a plasma cutting protection material, a preparation method and application thereof, and comprises the following components in parts by mass: resin 18-40 parts, toughening agent 0.1-2 parts, hydrolysis aid 0.7-4 parts, and solvent 50-100 parts. In the plasma cutting protection material, the resin is partially hydrolyzed by the hydrolysis aid, so that the hydrophilicity of the resin is enhanced, the miscibility with the solvent is improved, and a complete protection film can be formed on a wafer surface to resist etching of plasma; after the cutting process is completed, the formed protection film has extremely strong water solubility and can be easily removed, so that the cleaning process is simple.

The invention relates to the technical field of automobile part machining, and discloses automobile interior part machining plasma cutting equipment capable of achieving automatic feeding, the automobile interior part machining plasma cutting equipment comprises a bearing plate, a mechanical arm is installed at the rear end of the top face of the bearing plate, a plasma cutting gun is arranged on the mechanical arm, and the four corners of the bottom face of the bearing plate are fixedly installed on the top face of a base through supporting legs; according to the plasma cutting equipment capable of achieving automatic feeding and used for machining the automotive interior accessories, automatic transferring of materials from the material table to the machining table can be achieved, manual intervention is not needed, the labor cost is reduced, meanwhile, the production continuity is guaranteed, the machining efficiency is greatly improved, and the production efficiency is improved. And cold air is sprayed out in the feeding and cutting process, waste on a machining table is removed, workpieces can be cooled in the cutting process, the workpieces are effectively prevented from deforming due to high temperature, the product quality stability is guaranteed, meanwhile, waste gas generated by cutting is adsorbed, and the working environment is improved.

1. The name of the design product: plasma cutting gun. 2. The use of the design product: plasma cutting gun used for cutting metal materials. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

This invention discloses a high-efficiency cutting device, belonging to the technical field of cutting equipment. The device includes a material conveying mechanism, a plate limiting mechanism, a lateral movement mechanism, and a limit self-stop mechanism. The material conveying mechanism consists of a base, a mounting groove, and conveying rollers, used to drive stable conveying of the plate. The plate limiting mechanism adjusts the side limiting rollers via a threaded rod, a moving block, a connecting rod, and a crossbar, achieving automatic centering positioning of plates of different widths. The lateral movement mechanism consists of a support base, a fixed rod, and a main shaft. The main shaft surface is provided with a spiral groove. The limit self-stop mechanism engages with the main shaft under the action of a sliding plate, a fixing bolt, and a spring, realizing lateral movement control of the plasma cutting gun. When the cutting gun moves to the edge of the plate, the squeezing sliding plate cooperates with the stop block to disengage the fixing bolt, and the cutting gun automatically stops, avoiding idle travel and overshoot. The plasma power supply box is connected to the cutting gun, and the slag box is used to collect slag.

The invention discloses a plasma cutting device for aluminum alloy plate machining, and relates to the technical field of plasma cutting devices. Through cooperation of the vibrator, the slag discharging plate, the guide column and the telescopic spring, adhesion between cooled slag and the slag discharging plate is conveniently avoided, the slag cleaning efficiency and convenience are improved, and the function of promoting rapid sliding of the slag can be achieved; plasma cutting process parameters and plate characteristics are integrated through an analysis module, a slag quantity estimation model is established, and then the vibration amplitude and frequency are dynamically matched through an adjusting module based on a slag discharge quantity formula; obtaining a slag viscosity parameter in real time, and substituting the slag viscosity parameter into a slag discharge amount formula to carry out vibration parameter correction; when it is detected that the viscosity of the slag is increased, the adjusting module preferentially improves the vibration frequency, the viscosity breaking force is enhanced through the characteristic that the acceleration is in direct proportion to the square of the frequency, and equipment impact caused by purely increasing the amplitude is avoided; and when the viscosity is reduced, the frequency is properly reduced, the amplitude is reduced, and the energy consumption and the deslagging effect are balanced.

The utility model relates to the technical field of plasma cutting, in particular to a single-gas-path water-cooling fine plasma cutting gun. Comprising a protective cap, a nozzle, a fixed cover and a nozzle seat, the fixed cover is arranged on the outer side of the nozzle seat, the protective cap is installed on the fixed cover and covers and protects the nozzle, and the nozzle is arranged on the nozzle seat. A nozzle air outlet is formed in the front end of the nozzle; the protective cap is provided with a protective cap air outlet, a protective cap surface air outlet and a protective gas inlet; according to the structure that the air outlet of the protective cap is matched with the air outlet of the nozzle in position, the effects that the cutting surface is smooth, the perpendicularity of the cutting surface is smaller than 3 degrees, meanwhile, only air needs to be used as an air source, most water-cooling cutting machines in the market are adapted, and the use cost is reduced are achieved.

To provide a cutting and welding method of a cutting member capable of reducing time and work load by replacing cutting by gas cutting with cutting by a plasma cutting device.SOLUTION: The method for cutting and welding the cut member includes a cutting step of cutting the cut member 21 from the steel plate 20, and a welding step of welding the cut member 21 to a position where the cut member 21 of the steel plate 20 is present, and closing the provided hole. The cutting-out step includes a first cutting step in which a groove is provided on one side of the removal portion 22, such as the side where the plasma cutting device is present, and a second cutting step in which a groove is provided on the other side of the removal portion 22, such as the side where the plasma cutting device is present. In the welding process, the cutting member 21 is welded in a posture turned over in the thickness direction of the steel plate 20 from a posture in which the cutting member 21 exists with respect to the steel plate 20.SELECTED DRAWING: Figure 1