Torch auxiliary guide device

Abstract

The utility model provides a cutting torch auxiliary guide device, which is used to assist the cutting torch in cutting an arc on a workpiece to be cut, and includes: a base, a rotating mechanism and an operating mechanism, wherein the operating mechanism includes a swing arm and a support member arranged on the swing arm; wherein the base can be fixed to the workpiece to be cut, and the rotating mechanism is rotatably arranged on the base; one end of the swing arm is rotatably connected to the rotating mechanism, so that the swing arm can rotate around the rotating mechanism; the support member is provided with a mounting portion for assembling the cutting torch, so that the swing arm can drive the cutting torch to rotate around the rotating mechanism; the support member is slidably arranged on the swing arm, thereby making the distance between the cutting torch and the rotating mechanism adjustable. The above-mentioned cutting torch auxiliary guide device can guide and support the cutting torch, thereby improving work efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to an auxiliary guiding device for a cutting torch. Background Art

[0002] In the process of manufacturing structural parts for port machinery container cranes, manual cutting of arc holes using a suction cutting torch is often required. Especially in the process of structural part production, when design modifications occur, it is impossible to efficiently obtain the arc holes designed on the steel plates of the structural parts in advance through computer lofting, software typesetting, CNC cutting and other processes. The only way is for the operator to loft and mark the steel plate components according to the modified design drawings, obtain the center point of the circle, and then draw the cutting trajectory that needs to be manually cut out of the arc.

[0003] However, when using a suction cutting torch to manually cut steel plates, a high level of technical skills is required of the operator, otherwise the arc section cut will be poorly shaped and the groove phenomenon will be serious, resulting in a large amount of grinding and shaping work and low production efficiency. Utility Model Content

[0004] The utility model aims to provide a cutting torch auxiliary guide device, which can guide and support the cutting torch, improve work efficiency, enhance product quality, and reduce the labor intensity of operators.

[0005] One aspect of the utility model provides a cutting torch auxiliary guide device for assisting the cutting torch in cutting an arc on a workpiece to be cut, comprising: a base; a rotating mechanism; and an operating mechanism, wherein the operating mechanism comprises a swing arm and a support member arranged on the swing arm; wherein the base can be fixed to the workpiece to be cut, and the rotating mechanism is rotatably arranged on the base; one end of the swing arm is rotatably connected to the rotating mechanism so that the swing arm can rotate around the rotating mechanism; the support member is provided with a mounting portion for assembling the cutting torch so that the swing arm can drive the cutting torch to rotate around the rotating mechanism; the support member is slidably arranged on the swing arm, thereby making the distance between the cutting torch and the rotating mechanism adjustable.

[0006] In one embodiment, the mounting portion is a through mounting hole adapted to the cutting nozzle of the cutting torch; the support member is also provided with a guide hole for the swing arm to pass through, and the guide hole allows the support member to be sleeved on the swing arm; wherein, the axis of the guide hole is perpendicular to the axis of the mounting hole, thereby allowing the cutting nozzle of the cutting torch assembled in the mounting hole to be perpendicular to the swing arm.

[0007] In one embodiment, the support member is provided with a limiting hole, and the limiting hole is communicated with the guide hole; the cutting torch auxiliary guide device also includes a fastener, and the fastener can pass through the limiting hole and abut against the swing arm to fix the position of the support member relative to the swing arm.

[0008] In one embodiment, the operating mechanism also includes a scale for indicating the sliding position of the support member on the swing arm, and the scale is arranged on the swing arm; the end surface of the swing arm is recessed downward to form a groove for accommodating the scale, and the surface of the scale located in the groove is flush with the end surface forming the groove.

[0009] In one embodiment, the rotating mechanism includes a fixing member and a rotating structure; the fixing member is fixedly connected to the base; the rotating structure includes a rotating member for providing the rotation center and a connecting member connecting the rotating member and the swing arm; the rotating member is rotatably arranged on the fixing member.

[0010] In one embodiment, the rotating member includes a rotating shaft, a first bearing and a second bearing; wherein the first bearing and the second bearing are spaced apart and sleeved on the outer circumference of the rotating shaft; a rotating boss is provided at one end of the rotating shaft, the inner ring of the first bearing is pressed against the rotating boss and the outer circumferential wall of the rotating shaft, and the outer ring of the first bearing is pressed against the inner circumferential wall of the fixing member; the inner ring of the second bearing is pressed against the outer circumferential wall of the rotating shaft, and the outer ring of the second bearing is pressed against the inner circumferential wall of the fixing member.

[0011] In one embodiment, the rotating mechanism also includes a positioning shaft for aligning the center of the arc on the workpiece to be cut; the rotating shaft is axially provided with a hollow channel for assembling the positioning shaft, and the hollow channel and the positioning shaft are adapted to allow the positioning shaft to pass through the hollow channel, thereby enabling the end of the positioning shaft close to the workpiece to be cut to have a positioning function of locating the center of the arc.

[0012] In one embodiment, the operating mechanism also includes a guide sleeve; the connecting piece is provided with a first connecting hole and a second connecting hole relative to each other; the swing arm is provided with a third connecting hole; the first connecting hole is sleeved on the outer periphery of the rotating shaft, and the guide sleeve can pass through the second connecting hole and the third connecting hole to connect the connecting piece and the swing arm; the guide sleeve is provided with a guide shaft hole, and the positioning shaft can pass through the guide shaft hole, so that the second connecting hole, the third connecting hole and the guide shaft hole are coaxially arranged.

[0013] In one embodiment, the connecting member includes a first connecting rod and a second connecting rod and a third connecting rod respectively fixed at both ends of the first connecting rod; the second connecting rod and the first connecting rod, the third connecting rod and the first connecting rod are perpendicular to each other; the free end of the second connecting rod is provided with the first connecting hole, the free end of the third connecting rod is provided with the second connecting hole, and the hollow channel of the rotating shaft, the first connecting hole and the second connecting hole are coaxially arranged.

[0014] In one embodiment, the cutting torch auxiliary guide device also includes a retaining frame; the base includes a switch magnetic seat and a fixed bracket; wherein one end of the retaining frame is fixedly arranged on the fixed bracket, and the other end of the retaining frame is connected to the rotating mechanism; the fixed bracket is provided with a mounting position, and the switch magnetic seat is fixed in the mounting position; the switch magnetic seat can be selectively fixed to the workpiece to be cut by magnetic force.

[0015] The utility model of the auxiliary guide device for cutting torches can complete the operation of cutting and opening holes in structural steel plates conveniently, quickly, with high quality and high efficiency. By sliding the support member set on the swing arm to adjust the arc radius, it can be applied to arc cutting in different structural parts manufacturing scenarios of different sizes, and can effectively avoid the problem of poor cutting surface quality and a large amount of grinding workload caused by the uncertainty of the operator, effectively improve production efficiency, improve product cutting quality, and reduce labor intensity of personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0017] Figure 1 It is a schematic diagram of an embodiment of a cutting torch auxiliary guide device according to the utility model;

[0018] Figure 2 yes Figure 1 A schematic diagram of an embodiment of a mounting base of a cutting torch auxiliary guide device;

[0019] Figure 3 yes Figure 1 Schematic diagram of the auxiliary guide device of the middle cutting torch in a horizontal state;

[0020] Figure 4 yes Figure 1 Schematic diagram of the auxiliary guide device of the middle cutting torch in a vertical state;

[0021] Figure 5 yes Figure 1 Schematic diagram of the holder of the auxiliary guide device of the cutting torch;

[0022] Figure 6 yes Figure 1 Schematic diagram of the rotating mechanism of the auxiliary guide device of the cutting torch;

[0023] Figure 7 yes Figure 6 A side view of the rotating mechanism in FIG.

[0024] Figure 8 yes Figure 7 AA section view in;

[0025] Fig. 9 yes Figure 6 Exploded diagram of the rotating mechanism in ;

[0026] Fig.10 yes Figure 1 Schematic diagram of the operating mechanism of the auxiliary guide device of the cutting torch;

[0027] Fig.11 yes Fig.10 Exploded diagram of the operating mechanism;

[0028] Fig.12 is based on Figure 1 A schematic diagram of the steps of obtaining the center of a circle by marking a line with the cutting torch auxiliary guide device in field operation;

[0029] Fig.13 is based on Figure 1 A schematic diagram of the steps of aligning the cutting torch auxiliary guide device with the marking center fixture during field operation;

[0030] Fig.14 is based on Figure 1 Schematic diagram of the steps for adjusting the support piece of the cutting torch auxiliary guide device during field operation. DETAILED DESCRIPTION

[0031] Reference will now be made in detail to embodiments of the present invention, one or more examples of which are shown in the accompanying drawings. Each example is provided to explain the present invention, rather than to limit the present invention. In fact, it will be apparent to those skilled in the art that various modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as part of one embodiment may be used together with another embodiment to produce yet another embodiment. Therefore, the present invention is intended to cover these modifications and variations that fall within the scope of the appended claims and their equivalents.

[0032] As used herein, the term "axial" is the central axis of the component or a direction parallel to the central axis of the component. The terms "first", "second" and "third" may be used interchangeably to distinguish one component from another and are not intended to indicate the position or importance of each component.

[0033] Figure 1 An embodiment of the auxiliary guide device 10 of the cutting torch of the utility model is shown. The auxiliary guide device 10 of the cutting torch of the utility model is used to assist the cutting torch 1 in cutting an arc on the workpiece 2 to be cut. The cutting torch 1 is the main tool for gas cutting the workpiece, and its function is to mix oxygen and acetylene in proportion to form a preheating flame, and spray high-pressure pure oxygen onto the workpiece 2 to be cut, so that the cut metal burns in the oxygen jet, and the oxygen jet blows away the slag (oxide) generated by the combustion to form a cutting seam.

[0034] The auxiliary guide device 10 of the cutting torch of the utility model comprises a base 100, a rotating mechanism 200 and an operating mechanism 300. The rotating mechanism 200 is used to provide a rotation center. The operating mechanism 300 comprises a swing arm 310 and a support member 320 arranged on the swing arm 310. Among them, the base 100 can be fixed to the workpiece 2 to be cut, and the rotating mechanism 200 is rotatably arranged on the base 100. One end of the swing arm 310 is rotatably connected to the rotating mechanism 200 so that the swing arm 310 can rotate around the rotating mechanism 200. The support member 320 is provided with a mounting portion 321 for assembling the cutting torch 1 so that the swing arm 310 can drive the cutting torch 1 to rotate around the rotating mechanism 200. The support member 320 is slidably arranged on the swing arm 310, so that the distance between the cutting torch 1 and the rotating mechanism 200 is adjustable.

[0035] The utility model of the auxiliary guide device 10 for cutting torches can conveniently, quickly, with high quality and high efficiency complete the operation of cutting and opening holes in steel plates of structural parts. By sliding the support member 320 set on the swing arm 310 to adjust the arc radius, it can be applied to arc cutting in different structural parts manufacturing scenes of different sizes, and can effectively avoid the problem of poor cutting surface quality and a large amount of grinding workload caused by the uncertainty of the operator, effectively improve production efficiency, improve product cutting quality, and reduce labor intensity of personnel.

[0036] Figure 2 An embodiment of the base 100 of the cutting torch auxiliary guide device 10 is shown. Figure 1 and Figure 2In one embodiment, the auxiliary guide device 10 for cutting torch further includes a holder 400. The base 100 includes a switch magnetic base 110 and a fixed bracket 120. One end of the holder 400 is fixedly arranged on the fixed bracket 120, and the other end of the holder 400 is connected to the rotating mechanism 200. The fixed bracket 120 is provided with a mounting position 121, and the switch magnetic base 110 is fixed in the mounting position 121. The switch magnetic base 110 can be selectively fixed to the workpiece 2 to be cut by magnetic force. The switch magnetic base 110 is a magnetic clamp with an adjustable switch function, which is composed of a magnetic base body and a rotary switch 111. In this embodiment, the magnetic force can be directly adjusted by the rotary switch 111 on the magnetic base, so that the switch magnetic base 110 is fixedly adsorbed on the workpiece 2 to be cut or removed from the workpiece 2 to be cut. The switch magnetic base 110 can flexibly control the magnetic force as needed, which is convenient for operators to place or remove the auxiliary guide device 10 for cutting torch, and the clamping and release are fast, and the work efficiency is high.

[0037] Figure 3 and Figure 4 Two application states of the cutting torch auxiliary guide device 10 are shown respectively. Figure 3 As shown, the workpiece 2 to be cut is placed horizontally, the switch magnetic base 110 and the fixing bracket 120 are placed horizontally, and the cutting nozzle 1a of the cutting torch 1 is facing Figure 3 The switch magnetic base 110 can be used to tightly fix the workpiece on the magnetic base, such as Figure 4 As shown, the workpiece 2 to be cut is placed in a vertical direction, the switch magnetic base 110 and the fixing bracket 120 are placed vertically, and the cutting nozzle 1a of the cutting torch 1 is facing Figure 4 on the right side of the screen. Figure 4 The cutting torch auxiliary guide device 10 can also stably assist the cutting torch 1 in performing processing and welding operations.

[0038] like Figure 2 As shown, the number of switch magnetic bases 110 can be selected to be two. Accordingly, there are two mounting positions 121, and the two mounting positions 121 are arranged in parallel, such as Figure 2 As shown, the two switch magnetic bases 110 form a whole. The size of the mounting position 121 matches the size of the switch magnetic base 110, and the switch magnetic base 110 is fastened from the side using the hexagonal bolt 130. After the installation is completed, the bottom plane of the switch magnetic base 110 ( Figure 2 The upper plane of the switch magnetic base 110 in Figure 2 The upper planes of the fixing brackets 120 are parallel to each other and serve as the installation reference for the rotating mechanism 200 and the operating mechanism 300. The switch magnetic base 110 can be a finished V-shaped magnetic base.

[0039] Figure 5An embodiment of the holder 400 is shown. The holder 400 is used to mount the rotating mechanism 200 on the fixing bracket 120 of the base 100. The bottom plate 410 of the holder 400 is provided with four through holes, which match the four threaded holes on the upper plane of the fixing bracket 120 and are fastened by a combination of hexagonal bolts and washers.

[0040] like Figure 5 As shown, the retainer 400 is L-shaped and Figure 5 The end of the holder 400 extending to the right is provided with a mounting seat 420 for mounting the rotating mechanism 200, and the upper plane of the mounting seat 420 is provided with a threaded hole for connecting and fixing with the rotating mechanism 200.

[0041] Continue to refer Figure 5 The mounting seat 420 is provided with a mounting positioning hole 421 for accommodating the rotating mechanism 200. The opening axis of the mounting positioning hole 421 is perpendicular to the bottom plane of the switch magnetic seat 110.

[0042] The bottom plane of the retaining frame 400 and the installation positioning hole 421 are obtained by machining to ensure that the bottom plate 410 of the retaining frame 400 and the installation positioning hole 421 are perpendicular.

[0043] Figure 6 The structure of an embodiment of the rotating mechanism 200 is shown. In one embodiment, the rotating mechanism 200 includes a fixing member 210 and a rotating structure 220. The fixing member 210 is fixedly connected to the base 100 through a retaining frame 400. The rotating structure 220 includes a rotating member 221 and a connecting member 222. The rotating member 221 is used to provide a rotation center, and the connecting member 222 is used to connect the rotating member 221 and the connecting member 222 of the swing arm 310. The rotating member 221 is rotatably arranged on the fixing member 210. The axial direction of the rotating member 221 is the rotation center of the cutting torch auxiliary guide device 10.

[0044] The fixing member 210 may be selected as follows: Figures 6 to 9 The bearing seat shown is used to install and position the rotating shaft 221a, the first bearing 221b and the second bearing 221c. The installation positioning hole 421 provided on the installation seat 420 of the retainer 400 is matched with the fixing member 210, so that the fixing member 210 can be installed in the installation positioning hole 421 and fixed on the installation seat 420 by the hexagon socket bolt.

[0045] Figure 8 shows a cross-sectional view of the rotating mechanism 200, Fig. 9 An exploded view of the rotating mechanism 200 is shown. Figures 6 to 9Furthermore, the rotating member 221 includes a rotating shaft 221a, a first bearing 221b and a second bearing 221c. The first bearing 221b and the second bearing 221c are sleeved on the outer circumference of the rotating shaft 221a at intervals. One end of the rotating shaft 221a ( Figure 8 A rotating boss 221a-2 is provided above the rotating shaft 221a shown in the figure. The inner ring of the first bearing 221b is pressed against the rotating boss 221a-2 and the outer peripheral wall of the rotating shaft 221a, and the outer ring of the first bearing 221b is pressed against the inner peripheral wall of the fixing member 210. The inner ring of the second bearing 221c is pressed against the outer peripheral wall of the rotating shaft 221a, and the outer ring of the second bearing 221c is pressed against the inner peripheral wall of the fixing member 210. The first bearing 221b and the second bearing 221c are used to fix the rotating shaft 221a so that the rotating shaft 221a can be easily rotated. The first bearing 221b and the second bearing 221c can be selected as deep groove ball bearings.

[0046] Continue to refer Figure 8 and Fig. 9 The rotating mechanism 200 further includes a bearing sleeve 230, and the bearing sleeve 230 is used to keep a certain distance between the first bearing 221b and the second bearing 221c.

[0047] refer to Figure 1 In one embodiment, the rotating mechanism 200 further includes a positioning shaft 240 for aligning the center of the arc on the workpiece 2 to be cut. The positioning shaft 240 is used to determine the position of the auxiliary guide device. The rotating shaft 221a is used to guide the positioning shaft 240 to determine the center on the workpiece 2 to be cut. The rotating shaft 221a is axially provided with a hollow channel 221a-1 for assembling the positioning shaft 240. The hollow channel 221a-1 and the positioning shaft 240 are adapted to allow the positioning shaft 240 to pass through the hollow channel 221a-1, thereby enabling the end of the positioning shaft 240 close to the workpiece 2 to be cut to have a positioning function of locating the center of the arc 2a. Figure 1 As shown, the tip of the positioning shaft 240 ( Figure 1 The lower end of the positioning shaft 240 shown in the figure facilitates the positioning of the center of the arc 2a.

[0048] In one embodiment, the connecting member 222 is provided with a first connecting hole 222a and a second connecting hole 222b opposite to each other. The first connecting hole 222a is sleeved on the outer periphery of the rotating shaft 221a, and the second connecting hole 222b is connected to the swing arm 310 of the operating mechanism 300. Figure 8 and Fig. 9As shown, the connecting member 222 includes a first connecting rod 222c and a second connecting rod 222d and a third connecting rod 222e respectively fixedly arranged at both ends of the first connecting rod 222c. The second connecting rod 222d and the first connecting rod 222c, and the third connecting rod 222e and the first connecting rod 222c are perpendicular to each other. The free end of the second connecting rod 222d is provided with a first connecting hole 222a, and the free end of the third connecting rod 222e is provided with a second connecting hole 222b, and the hollow channel 221a-1 of the rotating shaft 221a, the first connecting hole 222a and the second connecting hole 222b are arranged coaxially. In this embodiment, the connecting member 222 is U-shaped, which can make room for the swing arm 310 and the cutting torch 1 during the rotation process, thereby increasing the degree of freedom of rotation.

[0049] like Figure 8 and Fig. 9 As shown, the rotating mechanism 200 further includes a locking nut 250. The locking nut 250 is used to fix the connecting member 222 and the rotating shaft 221a so that the connecting member 222 rotates together with the rotating shaft 221a. The rotating mechanism 200 further includes a bearing end cover 260. The bearing end cover 260 is fixedly connected to the fixing member 210 by bolts. The bearing end cover 260 is used to fix the first bearing 221b to prevent movement and prevent foreign matter from entering the bearing component.

[0050] Combination Figure 8 and Fig. 9 , the first bearing 221b, the sleeve and the second bearing 221c are installed in the fixing member 210 from top to bottom. The rotating shaft 221a and the inner rings of the first bearing 221b and the second bearing 221c are matched and installed. The rotating boss 221a-2 at one end of the rotating shaft 221a is matched with one end face of the first bearing 221b, and the other side of the rotating shaft 221a is provided with a step 221a-3 and a thread, so that the rotating shaft 221a is matched with the first connecting hole 222a of the connecting member 222, and then the connecting member 222 and the rotating shaft 221a are fixed to each other by the locking nut 250. The bearing end cover 260 matches the fixing member 210 and is fixedly connected to the fixing member 210 by a hexagon socket bolt to prevent the first bearing 221b from moving. After the above parts are assembled, the connecting member 222 can rotate freely around the axial direction of the rotating shaft 221a without restriction.

[0051] Fig.10 and Fig.11An embodiment of the operating mechanism 300 is shown. In one embodiment, the mounting portion 321 is a through mounting hole 321. The mounting hole 321 is adapted to the cutting nozzle 1a of the cutting torch 1. When the cutting torch auxiliary guide device 10 of the utility model is used, the cutting nozzle 1a of the cutting torch 1 is vertically inserted into the mounting hole 321 of the support member 320 for use. In this way, the size of the cutting arc 2a can be determined. The support member 320 is also provided with a guide hole 322 for the swing arm 310 to pass through, and the guide hole 322 allows the support member 320 to be sleeved on the swing arm 310.

[0052] like Fig.10 and Fig.11 As shown, the guide hole 322 is an inner square hole. The support member 320 can freely slide on the swing arm 310 through the guide hole 322 to adjust the spacing between the guide member and the positioning shaft 240. In this embodiment, the axis of the guide hole 322 is perpendicular to the axis of the mounting hole 321, so that the cutting nozzle 1a of the cutting torch 1 assembled in the mounting hole 321 is perpendicular to the swing arm 310 to ensure that the groove angle of the cutting surface is basically vertical.

[0053] In one embodiment, the support member 320 is provided with a limiting hole 323, and the limiting hole 323 is connected to the guide hole 322. The auxiliary guide device 10 for cutting torch further includes a fastener 360, which can pass through the limiting hole 323 and abut against the swing arm 310 to fix the position of the support member 320 relative to the swing arm 310. The fastener 360 can be a top screw, and the limiting hole 323 is a threaded hole matched with the top screw, and the top screw is used to adjust the relative position of the fixed support member 320 and the swing arm 310.

[0054] In one embodiment, the operating mechanism 300 further includes a scale 330 for indicating the sliding position of the support member 320 on the swing arm 310, and the scale 330 is disposed on the swing arm 310. The end surface of the swing arm 310 is recessed downward to form a groove 312 for accommodating the scale 330, and the surface of the scale 330 located in the groove 312 is flush with the end surface forming the groove 312. The scale 330 is installed on the swing arm 310 component to facilitate the adjustment of the size distance, so as to further facilitate the adjustment of the size of the arc 2a according to the marking on the workpiece 2 to be cut.

[0055] Continue to refer Fig.10 and Fig.11In one embodiment, the operating mechanism 300 further includes a guide sleeve 340. The guide sleeve 340 is used for center guidance and rotation of the swing arm 310. The swing arm 310 is provided with a third connecting hole 311. The guide sleeve 340 can pass through the second connecting hole 222b and the third connecting hole 311 to connect the connecting member 222 and the swing arm 310. The guide sleeve 340 is provided with a guide shaft hole 341, and the positioning shaft 240 can pass through the guide shaft hole 341, so that the second connecting hole 222b, the third connecting hole 311 and the guide shaft hole 341 are coaxially arranged.

[0056] like Fig.12 As shown, a guide boss 342 is provided at one end of the guide sleeve 340, and a retaining spring groove 343 is provided at the other end. Fig.11 As shown, the operating mechanism 300 further includes a retaining spring 350. The retaining spring 350 is used for guiding the sleeve 340 to prevent movement. The retaining spring 350 is used to connect the guide sleeve 340, the connecting member 222 and the swing arm 310, and the swing arm 310 can rotate freely around the guide sleeve 340.

[0057] Combined with the structures of the operating mechanism 300 and the rotating mechanism 200, the outer circle of the positioning shaft 240 matches the inner hole of the rotating shaft 221a, and matches the guide shaft hole 341 of the guide sleeve 340. The positioning shaft 240 passes through the rotating shaft 221a and the guide sleeve 340 respectively, and then the tip of the positioning shaft 240 coincides with the center of the circle to be cut to determine the rotation center of the cutting torch auxiliary guide device 10.

[0058] The hollow passage 221a-1 of the rotating shaft 221a, the first connecting hole 222a of the connecting member 222, the guide shaft hole 341 of the guide sleeve 340, the third connecting hole 311 of the swing arm 310 and the second connecting hole 222b of the connecting member 222 are all coaxially arranged and sequentially penetrated from top to bottom by the positioning shaft 240. At this time, the positioning shaft 240 can be understood as the rotation center of the cutting torch auxiliary guide device 10.

[0059] Through the ingenious combination of the above-mentioned parts and mechanisms, the arc 2a plate cutting operation of the structural parts or steel plates can be realized, which is more convenient and quick, with beautiful shape and higher quality to complete the steel plate cutting task.

[0060] The following further describes the operation process of the auxiliary guide device 10 for cutting torches of the present invention in combination with the accompanying drawings and the above-mentioned embodiments:

[0061] like Figure 3 and Figure 4 As shown, the operator can place the cutting torch auxiliary guide device 10 of the present invention according to the actual placement angle of the workpiece 2 to be cut, and cut the arc 2a on the workpiece 2 to be cut.

[0062] like Fig.12As shown, the first step: during on-site operation, the operator first lays out and marks the workpiece 2 to be cut in combination with the design modification drawing, and determines the center of the arc 2a to be cut according to the design size.

[0063] like Fig.13 As shown, the second step is to place the auxiliary guide device 10 of the cutting torch on the upper plane of the steel plate to be cut, pass the positioning shaft 240 through it, and align the tip of the positioning shaft 240 with the center of the circle determined by the layout and marking. After determining the position of the auxiliary guide device 10 of the cutting torch, turn on the rotary switch 111 of the switch magnetic base 110, and the auxiliary guide device 10 of the cutting torch can be adsorbed and fixed on the workpiece 2 to be cut.

[0064] like Fig.14 As shown, the third step: pull out the positioning shaft 240, and adjust the position of the support member 320 according to the size requirements of the drawing with the help of the ruler 330 as a reference, so that the axial center size of the mounting hole 321 of the support member 320 and the axial center size of the guide shaft hole 341 of the guide sleeve 340 are consistent with the size requirements of the drawing, and use the top screw to tighten the support member 320. Fig.14 The r in represents the arc radius on the workpiece 2 to be cut. By adjusting the position of the support member 320, the distance between the rotation center and the central axis of the mounting hole 321 of the support member 320 can be made equal to the arc radius r.

[0065] Step 4: After the above preparations are completed, place the cutting nozzle 1a of the cutting torch 1 in the mounting hole 321 of the support member 320 of the swing arm 310. After the cutting torch 1 is ignited, preheated, and punched, the handheld cutting torch 1 is rotated around the central axis of the rotating shaft 221a to cut the entire circle of the workpiece 2 to be cut from the main part.

[0066] It should be noted that the cutting torch 1 has several relative rotation movements during the rotation movement:

[0067] First, there is a gap between the cutting nozzle 1a of the cutting torch 1 and the mounting hole 321 of the support member 320, which facilitates relative rotation during the movement.

[0068] Second, the movement of the cutting torch 1 drives the swing arm 310 to rotate relatively around the axis center of the guide shaft hole 341 of the guide shaft sleeve 340 .

[0069] Third, when the cutting torch 1 rotates from one side of the connecting member 222 to the other side around the guide sleeve 340, the swing arm 310 and the support member 320 will collide with the connecting member 222. At this time, the cutting torch 1 is continuously moved, so that the support member 320 gently pushes the connecting member 222, and drives the inner ring of the rotating shaft 221a, the first bearing 221b and the second bearing 221c to start rotating around the rotation center. Through the relative rotation movement between multiple parts, the cutting task of the entire arc 2a can be completed.

[0070] The cutting torch auxiliary guide device 10 of the utility model can conveniently, quickly and reliably solve the production problems of low cutting efficiency and poor cutting quality when using a manual cutting torch 1 to manually cut the arc 2a holes temporarily arranged on the steel plate. The cutting arc 2a trajectory can be adjusted arbitrarily within a certain range, and is suitable for arc 2a cutting in the production scenes of different structural parts of different sizes. And it can have a good guiding effect on the arc 2a cutting process without adding any unnecessary processing content or actions, and it is small in size, flexible and easy to operate. Through reasonable use, it can effectively avoid the problem of poor cutting surface quality caused by uncertain factors of the operator and the generation of a large amount of grinding workload, effectively improve production efficiency, improve product cutting quality, and reduce labor intensity of personnel.

[0071] Although the utility model is disclosed as above with preferred embodiments, it is not intended to limit the utility model. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the utility model. Therefore, any modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model shall fall within the protection scope defined by the claims of the utility model.

Claims

1. A cutting torch auxiliary guide device, used to assist the cutting torch in cutting an arc on a workpiece to be cut, characterized in that: include: A base, a rotating mechanism and an operating mechanism; wherein, The operating mechanism includes a swing arm and a support member arranged on the swing arm; The base can be fixed to the workpiece to be cut, and the rotating mechanism is rotatably arranged on the base; One end of the swing arm is rotatably connected to the rotating mechanism so that the swing arm can rotate around the rotating mechanism; The support member is provided with a mounting portion for assembling a cutting torch, so that the swing arm can drive the cutting torch to rotate around the rotating mechanism; The support member is slidably arranged on the swing arm, thereby making the distance between the cutting torch and the rotating mechanism adjustable.

2. The cutting torch auxiliary guide device according to claim 1, characterized in that: The mounting portion is a through mounting hole adapted to the cutting nozzle of the cutting torch; The support member is also provided with a guide hole for the swing arm to pass through, and the guide hole enables the support member to be sleeved on the swing arm; The axis of the guide hole is perpendicular to the axis of the mounting hole, so that the cutting nozzle of the cutting torch assembled in the mounting hole is perpendicular to the swing arm.

3. The cutting torch auxiliary guide device according to claim 2, characterized in that: The support member is provided with a limiting hole, and the limiting hole is connected to the guide hole; The cutting torch auxiliary guide device also includes a fastener, which can pass through the limiting hole and abut against the swing arm to fix the position of the support member relative to the swing arm.

4. The cutting torch auxiliary guide device according to claim 1, characterized in that: The operating mechanism further comprises a scale for indicating the sliding position of the support member on the swing arm, wherein the scale is arranged on the swing arm; The end surface of the swing arm is recessed downward to form a groove for accommodating the ruler, and the surface of the ruler located in the groove is flush with the end surface forming the groove.

5. The cutting torch auxiliary guide device according to any one of claims 1 to 4, characterized in that: The rotating mechanism includes a fixing member and a rotating structure; The fixing member is fixedly connected to the base; The rotating structure includes a rotating member for providing a rotation center and a connecting member connecting the rotating member and the swing arm; The rotating member is rotatably disposed on the fixing member.

6. The cutting torch auxiliary guide device according to claim 5, characterized in that: The rotating member includes a rotating shaft, a first bearing and a second bearing; wherein, The first bearing and the second bearing are spaced apart and sleeved on the outer circumference of the rotating shaft; A rotating boss is provided at one end of the rotating shaft, the inner ring of the first bearing is pressed against the rotating boss and the outer peripheral wall of the rotating shaft, and the outer ring of the first bearing is pressed against the inner peripheral wall of the fixing member; The inner ring of the second bearing is pressed against the outer peripheral wall of the rotating shaft, and the outer ring of the second bearing is pressed against the inner peripheral wall of the fixing member.

7. The cutting torch auxiliary guide device according to claim 6, characterized in that: The rotating mechanism also includes a positioning shaft for aligning the center of the arc on the workpiece to be cut; The rotating shaft is axially provided with a hollow channel for assembling the positioning shaft, and the hollow channel and the positioning shaft are adapted to allow the positioning shaft to pass through the hollow channel, thereby enabling the end of the positioning shaft close to the workpiece to be cut to have a positioning function of the center of the positioning arc.

8. The cutting torch auxiliary guide device according to claim 7, characterized in that: The operating mechanism also includes a guide sleeve; The connecting member is provided with a first connecting hole and a second connecting hole which are opposite to each other; The swing arm is provided with a third connecting hole; The first connecting hole is sleeved on the outer circumference of the rotating shaft, and the guide sleeve can pass through the second connecting hole and the third connecting hole to connect the connecting member and the swing arm; The guide shaft sleeve is provided with a guide shaft hole, and the positioning shaft can pass through the guide shaft hole, so that the second connecting hole, the third connecting hole and the guide shaft hole are arranged coaxially.

9. The cutting torch auxiliary guide device according to claim 8, characterized in that: The connecting member includes a first connecting rod, and a second connecting rod and a third connecting rod respectively fixedly arranged at two ends of the first connecting rod; The second connecting rod and the first connecting rod, and the third connecting rod and the first connecting rod are perpendicular to each other; The first connecting hole is disposed at the free end of the second connecting rod, the second connecting hole is disposed at the free end of the third connecting rod, and the hollow passage of the rotating shaft, the first connecting hole and the second connecting hole are coaxially disposed.

10. The cutting torch auxiliary guide device according to any one of claims 1 to 4, characterized in that: The cutting torch auxiliary guide device also includes a retaining frame; The base includes a switch magnetic base and a fixing bracket; wherein, One end of the retaining frame is fixedly arranged on the fixing bracket, and the other end of the retaining frame is connected to the rotating mechanism; The fixing bracket is provided with a mounting position, and the switch magnetic base is fixed in the mounting position; The switch magnetic base can be selectively fixed to the workpiece to be cut by magnetic force.

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