Circular cutting positioning tool

Abstract

The present invention relates to the technical field of steel-plate cutting machining, and in particular relates to a circular cutting positioning tool. The circular cutting positioning tool comprises a sleeve, a positioning rod, a conical head, a fastener, a plurality of support legs and a plurality of pulleys, wherein the sleeve is connected to one end of the positioning rod; the positioning rod penetrates the conical head, and the conical head can slide in the axial direction of the positioning rod; the fastener is connected to the conical head and can abut against or separate from the positioning rod; one end of each of the plurality of support legs is circumferentially arranged around the outer wall of the conical head; the other ends of the plurality of support legs are correspondingly rotationally connected to the plurality of pulleys on a one-to-one basis; and the bottom end of the conical head and the bottom ends of the plurality of pulleys are located in the same horizontal plane. The conical head can be vertically arranged on a surface of a steel plate, thereby greatly improving the stability of the circular cutting positioning tool when same is placed on the steel plate, such that an operator does not need to press against the top end of the conical head with his / her hand, thereby freeing up one hand of the operator, and the operation is more convenient when the positioning rod is horizontally rotated, thus improving the cutting efficiency.

Description

Circular cutting positioning tool TECHNICAL FIELD

[0001] The present application relates to the technical field of steel plate cutting, in particular to a circular cutting positioning tool. BACKGROUND

[0002] When cutting a steel plate along a circular path, first draw an outline of the circle to be cut on the steel plate at the corresponding cutting position according to the size requirements on the drawing. Ignite the hand cutting torch and adjust the neutral flame, preheat the cutting position, and then turn on the cutting oxygen to penetrate the steel plate. Cut along the drawn outline until the cutting is complete. This cutting method requires manual operation along the outline, which is low in efficiency and poor in cutting quality due to the rough cut surface.

[0003] To improve the cutting efficiency and quality of the steel plate during manual operation, a positioning tool for the hand cutting torch is designed. The existing circular cutting positioning tool generally includes a conical head, an adjusting rod, a fastening bolt, and a sleeve, wherein the sleeve is connected to the free end of the adjusting rod; the adjusting rod penetrates the conical head and the two are slidingly connected, and the conical head and the sleeve are positioned according to the size of the circular steel plate to be cut; the fastening bolt is threadedly connected to the conical head and can abut against the adjusting rod to limit the relative sliding of the adjusting rod and the conical head. Before cutting, draw a circular outline and a center on the steel plate, install the hand cutting torch on the sleeve, place the tip of the conical head on the center, pull the adjusting rod so that the cutting nozzle of the hand cutting torch is aligned with the circular outline, and then tighten the fastener. During cutting, the operator presses one hand against the top end of the conical head to ensure the balance of the circular cutting positioning tool, and then rotates the adjusting rod with the other hand when the flame of the hand cutting torch penetrates the steel plate, so that the hand cutting torch cuts along the circular outline.

[0004] During the cutting process, the operator's left hand needs to continuously press against the conical head, which is relatively cumbersome. Moreover, during the process of rotating the adjusting rod with the right hand, the left and right hands will intersect, i.e., the right hand needs to move away from the adjusting rod and pass the left hand, and then the right hand continues to hold the adjusting rod and rotate it horizontally. The process of rotating the adjusting rod horizontally has a certain idle period, which results in low cutting efficiency.

[0005] SUMMARY

[0006] (I) Technical problems to be solved

[0007] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present application provides a circular cutting positioning tool, which solves the technical problems of the prior art, i.e., the cumbersome operation and low cutting efficiency.

[0008] (II) Technical solutions

[0009] To achieve the above object, the circular cutting positioning tool comprises a sleeve, a positioning rod, a conical head, a fastener, a plurality of legs and a plurality of pulleys;

[0010] The sleeve is connected to one end of the positioning rod;

[0011] The positioning rod penetrates the conical head, and the conical head can slide along the axial direction of the positioning rod;

[0012] The fastener is connected to the conical head, and the fastener can abut against or be separated from the positioning rod;

[0013] One end of each of the plurality of legs is circumferentially arranged along the outer wall of the conical head; the other end of each of the plurality of legs is rotationally connected to one of the plurality of pulleys; the bottom end of the conical head and the bottom end of each of the plurality of pulleys are located in the same horizontal plane.

[0014] Optionally, the leg is hinged to the conical head, and the bottom end of the pulley can swing below the conical head.

[0015] Optionally, the circular cutting positioning tool further comprises a plurality of wedge-shaped blocks;

[0016] The plurality of wedge-shaped blocks are circumferentially arranged along the outer wall of the conical head;

[0017] The conical head is provided with a strip-shaped clamping groove, and the leg can be clamped or unclamped with the strip-shaped clamping groove.

[0018] Optionally, the wedge-shaped block is provided with a limiting piece;

[0019] The limiting piece can limit or release the swing of the leg.

[0020] Optionally, the conical head is provided with a through hole and a first connecting hole;

[0021] The fastener is connected to the first connecting hole; the through hole is in communication with the first connecting hole, and the axes of the two are perpendicular.

[0022] Optionally, the through hole is a second connecting hole;

[0023] The second connecting hole or the first connecting hole is connected to the fastener to limit the positioning rod.

[0024] Optionally, the conical head is provided with a sliding hole in sliding connection with the positioning rod;

[0025] The axes of the first connecting hole and the second connecting hole are perpendicular to the axis of the sliding hole;

[0026] The positioning rod can be lifted along the axial direction of the first connecting hole in the sliding hole.

[0027] Optionally, the fastener is a bolt.

[0028] A plurality of insertion holes are formed in the positioning rod.

[0029] Optionally, the fastener is a bolt.

[0030] Optionally, the pulley is a universal wheel.

[0031] (Three) beneficial effects

[0032] The beneficial effects of the present application are:

[0033] On the basis of the existing circular cutting positioning tool, a plurality of legs and a plurality of pulleys are arranged along the outer wall of the conical head in the circumferential direction, and the bottom end of the conical head and the bottom end of the plurality of pulleys are located in the same horizontal plane, so that the conical head can be vertically erected on the surface of the steel plate, greatly improving the stability of the circular cutting positioning tool placed on the steel plate, so that the operator does not need to press the top end of the conical head with his hand, freeing one hand of the operator, making the operation more convenient when rotating the positioning rod horizontally, and effectively avoiding the interference of the left and right hands, eliminating the idle period of the interference, and improving the cutting efficiency.

[0034] Compared with the traditional circular cutting positioning tool, the stability of the circular cutting positioning tool of the present application is strong, without the need to open the conical head eye on the steel plate, further simplifying the cutting process, improving the operation efficiency, and at the same time ensuring the integrity of the surface of the steel plate. BRIEF DESCRIPTION OF DRAWINGS

[0035] Fig. 1 is a structural schematic view of the circular cutting positioning tool of the present application;

[0036] Fig. 2 is a top view of the circular cutting positioning tool of the present application;

[0037] Fig. 3 is a structural schematic view of the conical head of the present application;

[0038] Fig. 4 is a connection schematic view of the wedge block and the leg of the present application;

[0039] Fig. 5 is a connection schematic view of the conical head and the fastener in the first working condition of the present application;

[0040] Fig. 6 is a connection schematic view of the conical head and the fastener in the second working condition of the present application.

[0041]

Explanation of reference numerals

[0042] In order to better explain the present application, so as to be understood, the present application is described in detail below by specific embodiments in combination with the drawings.

[0043] It should be noted that all directional indications, such as upper, lower, left, right, front, rear, etc., are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0044] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0045] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integral; "connection" can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] Referring to FIGS. 1 and 2, the present application provides a circular cutting positioning tool, which comprises a sleeve 1, a positioning rod 2, a conical head 3, a fastener 4, a plurality of legs 5 and a plurality of pulleys 6; the sleeve 1 is connected with one end of the positioning rod 2; the positioning rod 2 penetrates through the conical head 3, and the conical head 3 can slide along the axial direction of the positioning rod 2; the fastener 4 is connected with the conical head 3, and the fastener 4 can abut or disengage with the positioning rod 2; one end of the plurality of legs 5 is arranged circumferentially around the outer wall of the conical head 3; the other end of the plurality of legs 5 is rotationally connected with the plurality of pulleys 6 one by one; the bottom end of the conical head 3 and the bottom end of the plurality of pulleys 6 are located in the same horizontal plane.

[0047] The circular cutting positioning tool can cut steel plates or other types of plate bodies, and can cut out circles, flanges and semicircular workpieces. When cutting large-size plate bodies, such as main reinforcement plates, due to their large size and heavy weight, the traditional beveling machine tire is difficult to put down, and the jib crane is also difficult to lift, so the circular cutting positioning tool can be used to perform cutting operations without moving or with less moving of the steel plate, which is flexible to use and has strong practicality, thereby enabling safe production.

[0048] On the basis of the existing circular cutting positioning tool, a plurality of legs 5 and a plurality of pulleys 6 are arranged along the outer wall of the conical head 3, and the bottom end of the conical head 3 and the bottom end of the plurality of pulleys 6 are located in the same horizontal plane, so that the conical head 3 can be vertically erected on the surface of the steel plate, greatly improving the stability of the circular cutting positioning tool placed on the steel plate, so that the operator does not need to press the top end of the conical head 3 with one hand, freeing one hand of the operator, making the operation more convenient when rotating the positioning rod 2 horizontally, and effectively avoiding the interference of the left and right hands, eliminating the idle period of the interference, and improving the cutting efficiency.

[0049] The traditional circular cutting positioning tool needs to open the eye of the conical head 3 on the steel plate, that is, a counterbore is opened at the center position of the circle drawn on the steel plate, which is generally drilled by the pointed head of a compass, and the counterbore is used to limit and position the pointed head of the conical head 3. The plurality of legs 5 and the plurality of pulleys 6 of the present application greatly enhance the stability of the circular cutting positioning tool, and do not need to open the eye on the steel plate, further simplifying the cutting process and improving the operation efficiency, while ensuring the integrity of the surface of the steel plate. Of course, the eye can also be opened on the steel plate to further improve the positioning accuracy of the circular cutting positioning tool and improve the cutting efficiency.

[0050] The traditional circular cutting positioning tool can rotate the sleeve by a hand torch during cutting, and then rotate the adjusting rod; or directly rotate the free end of the adjusting rod. No matter which rotating method, under the premise of not drilling the eye, the stability of the conical head cannot be effectively guaranteed; even if the eye is drilled, the limiting ability of the eye to the conical head is limited, and it is also difficult to guarantee the stability of the conical head, thereby affecting the cutting accuracy. The operator can only cut according to experience and feeling, and it is difficult to ensure that the flame sprayed by the hand torch is always perpendicular to the surface of the steel plate during the cutting process, resulting in a horseshoe-shaped cutting surface, which is not smooth. Therefore, the operator needs to press the conical head with one hand to ensure the stability of the conical head during cutting, and the process is relatively complex. The stability of the circular cutting positioning tool of the present application is strong when rotating horizontally, and the operator does not need to press the conical head with one hand, which well solves the above problems.

[0051] In the first embodiment, three legs 5 and three pulleys 6 are provided, and the included angle between adjacent legs 5 is 120°, and the array is fixedly arranged on the outer wall of the conical head 3. The leg 5 of the present embodiment is fixedly arranged with the conical head 3, has high structural strength, and is fast and convenient to use. Of course, the specific number of legs 5 and pulleys 6 can be set according to actual needs.

[0052] In the second embodiment, as shown in Fig. 3, the leg 5 is hinged with the conical head 3, and the bottom end of the pulley 6 can swing to the lower side of the conical head 3. The hinged structure enables the leg 5 to swing around its hinge point, achieving the adjustment of the vertical height of the pulley 6; by using the self-weight of the leg 5 and the pulley 6, the pulley 6 can be tightly pressed against the surface of the steel plate. This embodiment is particularly suitable for the steel plate with high surface roughness; the hinged structure cooperates with the self-weight of the leg 5 and the pulley 6 to adaptively adjust the vertical height of the pulley 6, so that the pulley 6 can smoothly walk on the concave-convex surface of the steel plate, effectively avoiding the wheel jamming situation, ensuring the stability of the horizontal rotation process of the circular cutting positioning tool, thereby ensuring the uniform horizontal rotation speed, and further ensuring the quality of the cutting surface, making the cutting surface smooth and high-precision after cutting.

[0053] In the third embodiment, referring to Fig. 4, the circular cutting positioning tool further comprises a plurality of wedge blocks 7; the plurality of wedge blocks 7 are arranged around the outer wall of the conical head 3; a strip-shaped clamping groove is formed on the conical head 3, and the leg 5 can be clamped or released from the strip-shaped clamping groove. Specifically, the number of the wedge blocks 7, the leg 5 and the pulley 6 is one-to-one corresponding. The shape and size of the strip-shaped clamping groove are adapted to the shape and size of the leg 5, as long as the leg 5 can be stably clamped in the strip-shaped clamping groove. This embodiment is particularly suitable for the steel plate with poor hardness or other workpieces with poor hardness; since the stress area of the tip of the conical head 3 is small, even if the tip is slightly polished into a semispherical shape, it is easy to press a pit on the steel plate, and this embodiment can effectively avoid the situation of reducing the quality of the steel plate by reducing the weight of the circular cutting positioning tool through the self-weight of the leg 5 and the pulley 6, and then limiting the leg 5 by clamping the wedge block 7.

[0054] Further, a limiting piece (not shown in the figure) is arranged on the wedge block 7; the limiting piece can limit or release the swing of the leg 5. The limiting piece can be a bolt, which is detachably connected with the wedge block 7; when the bolt is installed on the wedge block 7, the leg 5 is clamped in the space surrounded by the bolt and the strip-shaped clamping groove, and the swing of the leg 5 is limited by the rod of the bolt. Of course, a buckle structure can also be arranged on the wedge block 7, such as a hinge plate, which can limit or release the leg 5 by opening or closing the plate.

[0055] As shown in FIGS. 5 and 6, the taper head 3 is provided with a through hole 31 and a first connecting hole 32; the fastener 4 is connected with the first connecting hole 32; the through hole 31 is communicated with the first connecting hole 32, and the axes of the two are perpendicular. Since there are many workpiece scraps in the cutting site, the scraps are easy to enter the first connecting hole 32 through the fastener 4, and the cleaning is more complicated. By communicating the through hole 31 with the first connecting hole 32, the scraps can fall into the through hole 31 through the first connecting hole 32, so that the scraps entering the inside of the taper head 3 are conveniently cleaned, and the limiting effect of the fastener 4 is effectively ensured. Moreover, the through hole 31 can also play a weight reduction role, further reducing the self-weight of the taper head 3.

[0056] Further, the through hole 31 is a second connecting hole; the second connecting hole or the first connecting hole 32 is connected with the fastener 4 to be able to limit the positioning rod 2. FIG. 5 is a working condition that the first connecting hole 32 is connected with the fastener 4, in which the bottom end of the fastener 4 abuts on the top surface of the positioning rod 2. FIG. 6 is a working condition that the through hole 31 is connected with the fastener 4, in which the shank of the fastener 4 abuts on the bottom surface of the positioning rod 2. Both working conditions can frictionally limit the sliding of the positioning rod 2 in the taper head 3, and the connection mode of the fastener 4 can be selected according to the requirement. The second connecting hole improves the flexibility of the connection between the fastener 4 and the taper head 3, that is, even if the bottom end of the fastener 4 or the top surface of the positioning rod 2 is worn, the fastener 4 can be limited by the shank, which greatly prolongs the service life of the fastener 4 and the positioning rod 2, and vice versa.

[0057] Secondly, the taper head 3 is provided with a sliding hole 33 slidably connected with the positioning rod 2; the axes of the first connecting hole 32 and the second connecting hole are perpendicular to the axis of the sliding hole 33; the positioning rod 2 can be lifted along the axial direction of the first connecting hole 32 in the sliding hole 33. Specifically, in the vertical direction, the inner hole size of the sliding hole 33 is greater than the thickness of the positioning rod 2, which not only makes the positioning rod 2 slide more smoothly in the sliding hole 33, but also makes the vertical height of the positioning rod 2 adjustable, so as to adjust the height of the hand cutting torch cutting nozzle, and adjust the distance between the hand cutting torch cutting nozzle and the surface of the steel plate.

[0058] In the first working condition, the steel plate with a thickness of more than 30 mm is cut, as shown in Fig. 5, the fastener 4 is connected with the first connecting hole 32, the bottom end of the fastener 4 presses the positioning rod 2 on the bottom surface of the sliding hole 33, the height of the positioning rod 2 is lowered, the distance between the cutting nozzle and the steel plate is small, the steel plate can be fully burned, and the generation of the after-drag amount is effectively controlled. In the second working condition, the steel plate with a thickness of 12 mm to 25 mm is cut, as shown in Fig. 6, the fastener 4 is connected with the through hole 31, the shank of the fastener 4 presses the positioning rod 2 on the top surface of the sliding hole 33, the height of the positioning rod 2 is raised, the distance between the cutting nozzle and the steel plate is large, and the steel plate will not be melted when cutting. According to the thickness of the steel plate, the installation position of the fastener 4 is reasonably selected, the distance between the cutting nozzle of the hand cutting gun and the surface of the steel plate can be correspondingly adjusted, and the installation adaptability of the circular cutting positioning tool to the hand cutting gun of different models and sizes is improved.

[0059] In addition, the fastener 4 is a bolt; a plurality of plug-in holes are formed in the positioning rod 2. The fastener 4 can also be a bolt. The bolt is more convenient to use and has high disassembly and assembly efficiency; the bolt has high connection strength and good limiting effect, and reasonable selection can be made.

[0060] Further, the pulley 6 is a universal wheel. The universal wheel can walk in any direction in the horizontal plane, further reduces the situation that the pulley 6 is stuck due to the high roughness of the steel plate, ensures that the pulley 6 can slide smoothly, and thus cuts the steel plate at a uniform speed.

[0061] It should be understood that the above description of specific embodiments of the present application is only for the purpose of illustrating the technical route and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, but the present application is not limited to the above specific embodiments. Any changes or modifications made within the scope of the technical solution of the present application should be covered within the protection scope of the present application.

Claims

1. A round cutting positioning tool, characterized by, The circular cutting positioning tool comprises a sleeve (1), a positioning rod (2), a conical head (3), a fastener (4), a plurality of supporting legs (5) and a plurality of pulleys (6); The sleeve (1) is connected with one end of the positioning rod (2); The positioning rod (2) penetrates through the conical head (3), and the conical head (3) can slide along the axial direction of the positioning rod (2); The fastener (4) is connected with the conical head (3), and the fastener (4) can abut against or be separated from the positioning rod (2); One end of each of the supporting legs (5) is arranged in a circumferential direction along the outer wall of the conical head (3); the other end of each of the supporting legs (5) is rotationally connected with one of the pulleys (6) in a one-to-one correspondence; the bottom end of the conical head (3) and the bottom end of each of the pulleys (6) are located in the same horizontal plane.

2. The circular cutting positioning tooling of claim 1, wherein, The supporting leg (5) is hinged to the conical head (3), and the bottom end of the pulley (6) can swing below the conical head (3).

3. The circular cutting positioning tooling of claim 1, wherein, The circular cutting positioning tool further comprises a plurality of wedge-shaped blocks (7); The plurality of wedge-shaped blocks (7) are arranged in a circumferential direction along the outer wall of the conical head (3); A strip-shaped clamping groove is formed in the conical head (3), and the supporting leg (5) can be clamped in or separated from the strip-shaped clamping groove.

4. The circular cutting positioning tooling of claim 3, wherein, A limiting piece is arranged on the wedge-shaped block (7); The limiting piece can limit or release the swing of the supporting leg (5).

5. The circular cutting positioning tooling of claim 3, wherein, A through hole (31) and a first connecting hole (32) are formed in the conical head (3); The fastener (4) is connected with the first connecting hole (32); the through hole (31) is in communication with the first connecting hole (32), and the axes of the two are perpendicular.

6. The circular cutting positioning tooling of claim 5, wherein, The through hole (31) is a second connecting hole; The second connecting hole or the first connecting hole (32) is connected with the fastener (4) to limit the positioning rod (2).

7. The circular cutting positioning tooling of claim 6, wherein, A sliding hole (33) is formed in the conical head (3) and is in sliding connection with the positioning rod (2); The axes of the first connecting hole (32) and the second connecting hole are perpendicular to the axis of the sliding hole (33); The positioning rod (2) can be raised and lowered along the axial direction of the first connecting hole (32) in the sliding hole (33).

8. The circular cutting locator tooling of any one of claims 1-7, wherein, The fastener (4) is a bolt. A plurality of insertion holes are formed in the positioning rod (2).

9. The circular cutting locator tool of any one of claims 1-7, wherein, The fastener (4) is a bolt.

10. The circular cutting locator tool of any one of claims 1-7, wherein, The pulley (6) is a universal wheel.

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