CN217343953U - Auxiliary device for cutting circular metal workpiece - Google Patents

Abstract

The utility model relates to the technical field of machining, in particular to an auxiliary device for cutting a circular metal workpiece, which comprises a positioning base, an adjusting bracket and a supporting frame, wherein the positioning base is provided with a fixing piece which is connected with the metal workpiece; the adjusting bracket comprises a connecting rod, one end of the connecting rod is connected with the positioning base, and the length of the connecting rod is adjustable; the support frame is connected with the other end of connecting rod, and the support frame is used for supporting and connecting cutting equipment. The length of the connecting rod of the auxiliary device for cutting the circular metal workpiece can be adjusted, when an operator carries the auxiliary device, the length of the connecting rod can be changed into the shortest length, the relative length between the positioning base and the supporting frame is shortened, and the difficulty in carrying the operator is reduced; meanwhile, when an operator cuts the circular metal workpieces with different sizes, the length of the connecting rod is only required to be adjusted.

Description

Auxiliary device for cutting circular metal workpiece

Technical Field

The utility model relates to the technical field of machining, especially, relate to an auxiliary device for cutting of circular metal work piece.

Background

When repairing ships in ports or anchor places, some situations of cutting round workpieces and parts are often encountered, and in order to improve the cutting quality and the cutting speed of the round workpieces, metal auxiliary cutting devices are often adopted by operators. For example, patent document CN202022590038.2 discloses an oxygen welding and cutting assistor for circular steel plate, the length of the adjusting rod of the assistor is fixed, the adjusting rod is fixedly connected with the base through a bolt, and a worker adjusts the distance between the center of the gas cutting torch station in the assistor and the center of the base through a turnbuckle, so as to complete the cutting of the circular steel plate through the assistor. Because the length of adjusting lever is fixed, can't fold between the regulation pole, be unfavorable for auxiliary device's transport and storage. Therefore, a metal auxiliary device with a telescopic connecting rod body is needed to facilitate carrying and carrying of operators.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an auxiliary device for cutting circular metal workpieces, the length of the connecting rod can be adjusted, and when an operator cuts circular workpieces with different sizes, the operator only needs to adjust the relative length of the connecting rod of the auxiliary device; when carrying the auxiliary device, the operator can change the length of the connecting rod into the shortest length, so that the relative length between the positioning base and the supporting frame is shortened, the difficulty in carrying the operator is reduced, and the operator can carry and carry the connecting rod conveniently.

In order to solve the technical problem, the utility model provides an auxiliary device for cutting a circular metal workpiece, which comprises a positioning base, an adjusting bracket and a supporting frame, wherein the positioning base is provided with a fixing piece which is connected with the metal workpiece; the adjusting bracket comprises a connecting rod, one end of the connecting rod is connected with the positioning base, and the length of the connecting rod is adjustable; the support frame is connected with the other end of connecting rod, and the support frame is used for supporting and connecting cutting equipment.

Further, the connecting rod includes rocking arm, flexible arm, and rocking arm one end rotates with the mounting to be connected, and the rocking arm other end is connected with flexible arm, and flexible arm is equipped with the spout, and flexible arm can follow rocking arm relative movement, and the screw rod passes the spout to be connected with the rocking arm, and the screw rod top is equipped with the nut, and the nut butt is on flexible arm length with fixed connection pole to the side.

Furthermore, the connecting rod also comprises a limiting unit, the limiting unit is fixedly connected with the rocker arm, and when the limiting unit is abutted against the telescopic arm, the telescopic arm and the rocker arm are limited to move back and forth; when the limiting unit is separated from the telescopic arm, the telescopic arm can move back and forth along the rocker arm.

Further, spacing unit includes locating support, limiting plate, the locating support be located the spout inboard and with rocking arm fixed connection, locating support and spout inside wall butt, the limiting plate is articulated with the locating support, the limiting plate includes butt portion, presses the splenium, butt portion and spout go up the side butt, press and press the splenium to make butt portion and spout go up the side and take place to separate.

Further, more specifically, the side of butt portion and spout butt is equipped with the elastic component.

Furthermore, the elastic piece is a rubber block, and the rubber block is connected with the lower side surface of the abutting part in an adhesion mode.

Furthermore, the fixing piece is a circular magnetic sucker, and a plurality of marking parts are arranged on the circumferential side surface of the circular magnetic sucker.

Furthermore, one end of the telescopic arm close to the rocker arm is provided with a pointer, and the upper surface of the rocker arm is provided with a graduated scale.

Furthermore, the support frame comprises a folded plate and a cutting torch sleeve, one end of the folded plate is connected with the connecting rod, and the other end of the folded plate is connected with the cutting torch sleeve.

Furthermore, the support frame still includes adjustable pulley, and adjustable pulley closes with folded plate screw thread soon to be connected, and adjustable pulley is used for supporting folded plate and cutting torch cover.

The utility model has the advantages that the length of the connecting rod can be adjusted, the distance from the center of the positioning base to the support frame is the radius size of the round workpiece, and when the operator cuts round workpieces with different sizes, the operator only needs to adjust the relative length of the connecting rod; when carrying the auxiliary device, an operator can change the length of the connecting rod into the shortest length, so that the relative length between the positioning base and the supporting frame is shortened, namely the length of the auxiliary device is changed into the smallest form, and the auxiliary device is more convenient for carrying and carrying.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:

fig. 1 is a schematic perspective view of an auxiliary device for cutting a circular metal workpiece according to an embodiment of the present invention;

fig. 2 is a schematic view of a partial structure of fig. 1A of the present invention.

Fig. 3 is a schematic sectional view of a partial structure shown in fig. 1B of the present invention.

Wherein: 1. positioning a base; 101. a fixing member; 2. adjusting the bracket; 3. a support frame; 301. folding the plate; 302. a cutting torch sleeve 303 and an adjustable pulley; 4. a connecting rod; 401. a rocker arm; 402. a telescopic arm; 5. a chute; 6. a screw; 7. a nut; 8. a limiting unit; 801. positioning the bracket; 802. a limiting plate; 8021. an abutting portion; 8022. a pressing part; 9. a marking section; 10. an elastic member; 11. a pointer; 12. a graduated scale.

Detailed Description

In order to more clearly explain the overall concept of the present invention, the following detailed description is given by way of example in conjunction with the accompanying drawings.

It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.

In addition, in the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. However, the direct connection means that the two bodies are not connected to each other by the intermediate structure but connected to each other by the connecting structure to form a whole. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In the present invention, as shown in fig. 1-3, an auxiliary device for cutting a circular metal workpiece is provided, which includes a positioning base 1, an adjusting bracket 2, and a supporting frame 3, wherein the positioning base 1 is provided with a fixing member 101, and the fixing member 101 is connected with the metal workpiece; the adjusting bracket 2 comprises a connecting rod 4, one end of the connecting rod 4 is connected with the positioning base 1, and the length of the connecting rod 4 is adjustable; the other end of support frame 3 and connecting rod 4 is connected, and support frame 3 is used for the support to connect cutting equipment.

When an operator cuts the plate, the positioning base 1 is placed at the central position of the circular plate to be cut, after the operator determines the size of the circular workpiece to be cut, the length of the support 2 can be adjusted in the auxiliary device for cutting the circular workpiece according to the size, and after the length of the connecting rod 4 is adjusted, the operator can place cutting equipment for cutting the circular workpiece on the support frame 3. At this moment, because the positions of the positioning base 1 and the metal workpiece and the length of the adjusting bracket 2 are fixed, the connecting rod 4 can rotate circumferentially around the positioning base 1, and an operator only needs to move the cutting equipment according to the auxiliary device of the circular metal workpiece, so that the cutting equipment can move circumferentially along the positioning base 1, and the operator can rapidly cut the circular workpiece from the metal plate.

Compare in patent document [ CN202022590038.2] and disclose a circular steel sheet oxygen welding cutting assistor, the utility model discloses an among the auxiliary device of circular work piece cutting, connecting rod 4 one end and positioning base 1 fixed connection, one end is connected with support frame 3, operating personnel when cutting the circular work piece of equidimension not, only need adjust connecting rod 4 relative length can, positioning base 1 center is the radius size of circular work piece promptly to the distance of support frame 3 this moment.

The length of the connecting rod of the auxiliary device in the utility model is adjustable, when the operator carries the auxiliary device, the length of the connecting rod can be changed into the shortest length, the relative length between the positioning base 1 and the supporting frame 3 is shortened, and the difficulty of carrying the operator is reduced; when operating personnel cut circular metal workpiece, only need the length of adjusting the connecting rod can.

Regarding the structure of the connecting rod 4, in a preferred embodiment, further specifically, the connecting rod 4 includes a rocker arm 401 and a telescopic arm 402, one end of the rocker arm 401 is rotatably connected with the fixing member 101, the other end of the rocker arm 401 is connected with the telescopic arm 402, the telescopic arm 402 is provided with a sliding slot 5, the telescopic arm 402 can relatively move along the rocker arm 401, a screw rod 6 passes through the sliding slot 5 to be connected with the rocker arm 401, the top of the screw rod 6 is provided with a nut 7, and the nut 7 abuts against the upper side surface of the telescopic arm 402 to fix the length of the connecting rod 4.

As shown in fig. 1, in the auxiliary device for cutting a circular metal workpiece of the present invention, the connecting rod 4 comprises a rocker arm 401 and a telescopic arm 402, the rocker arm 401 is connected to the fixing member 101, the rocker arm 401 can rotate relatively around the fixing member 101, and the telescopic arm 402 is located on the upper side of the rocker arm 401 and can move relatively along the rocker arm 401. When the operator adjusts the length of the connecting rod 4 according to the round workpiece, the operator only needs to adjust the relative length between the telescopic arm 402 and the rocker arm 401, when the operator adjusts the length to a proper length, the screw 6 is used to penetrate through the chute 5 of the telescopic arm 402 to be screwed with the thread of the rocker arm 401, and meanwhile, the nut 7 and the screw 6 are screwed and abutted to the upper side face of the telescopic arm 402 and are used for fixing the telescopic arm 402 and the rocker arm 401, so that the length of the connecting rod 4 is not changed any more. If the operator needs to cut circular workpieces of different sizes, the length of the telescopic arm 402 and the rocker arm 401 can be changed by only making the nut 7 not abut against the telescopic arm 402.

Adopt the connecting rod 4 of multistage formula, can make things convenient for operating personnel to adjust the length of connecting rod 4 more, reduced the shared relative area of auxiliary device when using, simultaneously, adopt the mode that screw rod 6 and nut 7 closed, butt soon, the operating personnel of being more convenient for is to the adjustment of auxiliary device length.

In a preferred embodiment, more specifically, the connecting rod 4 further includes a limiting unit 8, the limiting unit 8 is fixedly connected to the rocker arm 401, and when the limiting unit 8 abuts against the telescopic arm 402, the telescopic arm 402 and the rocker arm 401 are limited from moving back and forth; when the stopper unit 8 is separated from the telescopic arm 402, the telescopic arm 402 can move forward and backward along the swing arm 401.

The utility model discloses an among the auxiliary device of circular metal work piece cutting, connecting rod 4 still includes spacing unit 8, spacing unit 8 and rocking arm 401 fixed connection, and during spacing unit 8 and flexible arm 402 butt, flexible arm 402 can't take place relative movement along rocking arm 401 simultaneously. When operating personnel adjusts the length of connecting rod 4, nut 7 no longer abuts with flexible arm 402, operating personnel no longer abuts spacing unit 8 with flexible arm 402, and then can remove flexible arm 402, treat to adjust relative scale after, can be earlier with spacing unit 8 and flexible arm 402 butt, guarantee that the length between flexible arm 402 and the rocking arm 401 no longer changes, avoided operating personnel at the in-process with nut 7 and flexible arm 402 butt, length between flexible arm 402 and the rocking arm 401 changes. Adopt the mode of spacing unit 8 and flexible arm 402 butt, when operating personnel was adjusting the length of connecting rod 4, spacing unit 8 was injectd flexible arm 402 and rocking arm 401's length, took place not hard up the condition between rocking arm 401 and the flexible arm 402 when having reduced the fixed connection pole, has improved auxiliary device's accuracy.

Regarding the structure of the limiting unit 8, in a preferred embodiment, further specifically, the limiting unit 8 includes a positioning bracket 801 and a limiting plate 802, the positioning bracket 801 is located inside the chute 5 and is fixedly connected to the rocker arm 401, the positioning bracket 801 abuts against an inner side wall of the chute 5, the limiting plate 802 is hinged to the positioning bracket 801, the limiting plate 802 includes an abutting portion 8021 and a pressing portion 8022, the abutting portion 8021 abuts against an upper side surface of the chute 5, and the pressing portion 8022 is pressed to separate the abutting portion 8021 from the upper side surface of the chute 5.

As shown in fig. 1 and 3, in the auxiliary device for cutting a circular metal workpiece of the present invention, the positioning bracket 801 is located in the sliding groove 5 on the upper side of the rocker arm 401, and the limiting plate 802 is hinged to the positioning bracket 801 and abuts against the upper side of the telescopic arm 402. When the operator adjusts the relative length of the connecting rod 4, the pressing part 8022 of the limiting plate 802 is pressed to separate the abutting part 8021 of the limiting plate 802 from the upper side of the chute 5, and the operator moves the telescopic arm 402; when the length of the connecting rod 4 is adjusted, the operator releases the pressing portion 8022 to enable the abutting portion 8021 to abut against the upper side face of the chute 5 again, so that the telescopic arm 402 is limited from changing the position along the rocker arm 401.

Because the positioning bracket 801 is abutted against the inner side wall of the chute 5, when an operator moves the telescopic arm 402, the positioning bracket 801 can avoid the conditions of left-right swinging, dislocation and the like of the telescopic arm 402 on the upper side of the rocker arm 401, and a straight line is ensured between the telescopic arm 402 and the rocker arm 401; in addition, through locating support 801 and limiting plate 802, operating personnel can press limiting plate 802 by one hand when adjusting the relative length of connecting rod 4 to at the in-process that removes telescopic boom 402, reduced the degree of difficulty of operation, improved metal cutting device's accuracy simultaneously.

It should be noted that, in the auxiliary device for cutting a circular metal workpiece of the present invention, the limiting unit further has a torsion spring, and the connection structure of the torsion spring at the limiting unit 8 is not shown in the drawings of the specification, and those skilled in the art can install the torsion spring according to the prior art.

Regarding the structure of the abutting portion 8021 on the upper side of the chute 5, in a preferred embodiment, more specifically, the elastic member 10 is provided on the side of the abutting portion 8021 abutting the chute 5. The utility model discloses an among the auxiliary device of circular metal work piece cutting, in order to avoid the butt portion 8021 of limiting plate 802 and spout 5 side to take place not hard up, be equipped with elastic component 10 in the side of butt portion 8021 and spout 5 butt, elastic component 10 is located butt portion 8021 side and spout 5 side between the side, frictional force between the side is gone up to increase butt portion 8021 that can be fine and spout 5, avoid operating personnel when making nut 7 and flexible arm 402 side butt, take place dislocation or not hard up between flexible arm 402 and the rocking arm 401.

Regarding the structure of the elastic member 10, in a preferred embodiment, more specifically, the elastic member 10 is a rubber block, and the rubber block is bonded to the lower side of the abutting portion 8021.

In the utility model, the elastic element 10 is a rubber block which can increase the friction between the abutting part 8021 and the upper side of the chute 5, and at the same time, the rubber block reduces the probability of collision between the abutting part 8021 and the upper side of the chute 5 when the pressing part 8022 is loosened by an operator; to facilitate the installation and replacement of the rubber block at the abutment 8021, the rubber block is bonded to the side of the abutment 8021.

It should be noted that the present invention is not limited to the material of the elastic element 10 and the connection manner between the elastic element 10 and the abutting portion 8021, and in another embodiment, the elastic element 10 is a rubber sleeve, and the rubber sleeve is sleeved on the abutting portion 8021.

In a preferred embodiment, the fixing member 101 is a circular magnetic chuck, and the circumferential side of the circular magnetic chuck is provided with a plurality of marking portions 9.

As shown in fig. 1, in the auxiliary device for cutting a circular metal workpiece of the present invention, the fixing member 101 is a circular magnetic chuck, and meanwhile, in order to increase the accuracy of cutting, a plurality of marking portions 9 are provided on the side of the circumference of the circular magnetic chuck. In an embodiment, four marking parts 9 are arranged on the circumferential side surface of the circular magnetic chuck, the marking parts 9 are uniformly distributed along the circumferential side surface, when an operator needs to cut a circular metal workpiece at a fixed circle center position of a plate, the operator only needs to make two cross lines which cross the circle center and are perpendicular to each other according to the circle center, the marking parts 9 on the circumferential side surface are aligned with the points of the cross lines, at the moment, the circle center of the circular magnetic chuck is consistent with the circle center of the circular metal workpiece needing to be cut, the mode that the circle center is determined by the marking parts 9 is adopted, the operator can be guaranteed to find an accurate cutting position more quickly, and the accuracy and the rapidity of metal cutting are improved simultaneously.

In a preferred embodiment, more specifically, one end of the telescopic arm 402 close to the rocker arm 401 is provided with a pointer 11, and the upper surface of the rocker arm 401 is provided with a graduated scale 12.

As shown in fig. 1 and 2, the utility model discloses an among the auxiliary device of circular metal workpiece cutting, in order to make the suitable connecting rod 4 length of size adjustment that operating personnel can be according to circular work piece, be equipped with scale 12 at the upper surface of rocking arm 401, in this auxiliary device, the length of location base 1 and support frame 3 is fixed, and operating personnel only need move flexible arm 402 according to the numerical value that pointer 11 indicates on scale 12 when adjusting connecting rod 4 length can.

It should be noted that the length of the scale 12 already includes the sum of the radius of the support 3 and the radius of the circular magnetic chuck.

Regarding the structure of the support 3, in the preferred embodiment, the support 3 further comprises a folding plate 301 and a cutting torch sleeve 302, wherein one end of the folding plate 301 is connected with the connecting rod 4, and the other end of the folding plate 301 is connected with the cutting torch sleeve 302.

As shown in fig. 1, in the utility model discloses an auxiliary device for cutting circular metal workpiece, support frame 3 includes folded plate 301, and folded plate 301 is used for connecting rod 4 and cutting torch cover 302, and is concrete, and operating personnel adopts bolted connection between one end of folded plate 301 and the flexible arm 402, is connected the other end and the cutting torch cover 302 of folded plate 301. When an operator cuts a workpiece, after the auxiliary device is fixed on the workpiece and the operator adjusts the corresponding length of the auxiliary device, the operator only needs to place the cutting torch tip of the cutting device in the cutting torch sleeve 302, and then perform circular cutting on the workpiece.

It should be noted that, regarding that the torch sleeve 302 is only used for supporting and connecting the cutting torch tip in the cutting device, this part is not taken as the emphasis of the improvement of the present application, and is not described herein again, and those skilled in the art can flexibly select the existing torch sleeve 302 according to the size of the cutting torch tip of the cutting device when implementing the technical solution of the present application.

Regarding the structure of the support 3, in a preferred embodiment, the support 3 further includes an adjustable pulley 303, the adjustable pulley 303 is screwed with the flap 301, and the adjustable pulley 303 is used for supporting the flap 301 and the torch sheath 302.

As shown in fig. 1, the auxiliary device for cutting a circular metal workpiece of the present invention includes an adjustable pulley 303 screwed to a folded plate 301, and the adjustable pulley 303 is located under the folded plate 301 and can support the folded plate 301 and a connecting rod 4 and a cutting torch sleeve 302 connected to the folded plate 301. In order to avoid the influence on the accuracy of the auxiliary device caused by the deformation between the folded plate 301 and the connecting rod 4 of the auxiliary device under the self gravity of the connecting rod 4 and the long-term pressure of the cutting torch tip in the cutting device, the adjustable pulley 303 is arranged at the position of the folded plate 301 to ensure that the pulley can support the folded plate 301, the connecting rod 4 and the cutting torch sleeve 302, and the accuracy of the auxiliary device for cutting the circular metal workpiece is improved. Meanwhile, an operator can enable the pulley to be always in contact with the workpiece by adjusting the adjustable pulley 303, and when the operator performs circular cutting on the workpiece, the adjustable pulley 303 can support the cutting torch; in addition, the adjustable pulley 303 can better enable the accessory equipment and the cutting nozzle to rotate along the circular magnetic chuck.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims (10)

1. An auxiliary device for cutting a circular metal workpiece, comprising:

the positioning base is provided with a fixing piece, and the fixing piece is connected with the metal workpiece;

the adjusting bracket comprises a connecting rod, one end of the connecting rod is connected with the positioning base, and the length of the connecting rod is adjustable;

the support frame, the support frame with the other end of connecting rod is connected, the support frame is used for supporting and connects cutting equipment.

2. An auxiliary device for cutting of circular metal workpieces according to claim 1, characterized in that: the connecting rod includes rocking arm, flexible arm, rocking arm one end with the mounting rotates to be connected, the rocking arm other end with flexible arm is connected, flexible arm is equipped with the spout, flexible arm can be followed rocking arm relative movement, the screw rod passes the spout with the rocking arm is connected, the screw rod top is equipped with the nut, the nut butt is in side is in order to fix on the flexible arm the length of connecting rod.

3. An auxiliary device for cutting of circular metal workpieces according to claim 2, characterized in that: the connecting rod further comprises a limiting unit, the limiting unit is fixedly connected with the rocker arm, and when the limiting unit is abutted against the telescopic arm, the telescopic arm and the rocker arm are limited to move back and forth; when the limiting unit is separated from the telescopic arm, the telescopic arm can move back and forth along the rocker arm.

4. An auxiliary device for cutting of circular metal workpieces according to claim 3, characterized in that: the limiting unit comprises a positioning support and a limiting plate, the positioning support is located on the inner side of the sliding groove and fixedly connected with the rocker arm, the positioning support is abutted to the inner side wall of the sliding groove, the limiting plate is hinged to the positioning support, the limiting plate comprises an abutting portion and a pressing portion, the abutting portion is abutted to the side face of the sliding groove, and the pressing portion can enable the abutting portion to be separated from the side face of the sliding groove.

5. An aid for circular metal workpiece cutting as claimed in claim 4 wherein: the side of the abutting part and the sliding groove is provided with an elastic part.

6. An auxiliary device for cutting of circular metal workpieces according to claim 5, characterized in that: the elastic piece is a rubber block, and the rubber block is connected with the lower side face of the abutting part in an adhesive mode.

7. An auxiliary device for cutting of circular metal workpieces according to claim 1, characterized in that: the fixing piece is a circular magnetic sucker, and a plurality of marking parts are arranged on the circumferential side surface of the circular magnetic sucker.

8. An auxiliary device for cutting of circular metal workpieces according to claim 4, characterized in that: one end of the telescopic arm close to the rocker arm is provided with a pointer, and the upper surface of the rocker arm is provided with a graduated scale.

9. An auxiliary device for cutting of circular metal workpieces, as claimed in claim 1, characterized in that: the support frame comprises a folded plate and a cutting torch sleeve, one end of the folded plate is connected with the connecting rod, and the other end of the folded plate is connected with the cutting torch sleeve.

10. An auxiliary device for cutting of circular metal workpieces according to claim 9, characterized in that: the support frame also comprises an adjustable pulley, the adjustable pulley is in threaded screwing connection with the folded plate, and the adjustable pulley is used for supporting the folded plate and the cutting torch sleeve.

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