A hand flame cutting aid

Abstract

The utility model discloses a kind of manual flame cutting auxiliary devices, including bottom plate, stand, positioning sleeve, rotary sleeve, horizontal rod, connecting block and fixed ring, stand bottom is threadedly connected with bottom plate, positioning sleeve is sleeved in the outside of stand, and the side wall of positioning sleeve is equipped with the first locking screw for fixing the relative position of positioning sleeve and stand;Rotary sleeve is sleeved in the outside of positioning sleeve, and the side wall of rotary sleeve is equipped with the second locking screw for fixing the relative position of rotary sleeve and positioning sleeve;Rotary sleeve both sides ear plate is symmetrically equipped with the through hole for passing through horizontal rod, and the side wall of rotary sleeve ear plate is equipped with the third locking screw for fixing rotary sleeve and horizontal rod;Horizontal rod is equipped with two, one end is threadedly connected with connecting block, the other end is threaded in the through hole of rotary sleeve, fixed ring is connected with connecting block by bolt, and fixed ring is clamped flame gun.This device can realize linear and circular cutting, improve device flexibility and efficiency, and each component can be disassembled and decomposed, small space occupation when not in use, convenient to carry.

Description

Technical Field

[0001] The embodiments of this utility model belong to the field of flame cutting technology, and more specifically, relate to a manual flame cutting auxiliary device. Background Technology

[0002] Flame cutting is a processing method that uses the high-temperature flame generated by the combustion of oxygen, acetylene, or other combustible gases to cut metal materials into the desired shape. Manual flame cutting, operated by a person holding a flame gun (also called a cutting torch), is widely used in the metal processing field due to its ease of operation and low cost. However, this processing method has inherent drawbacks: the large heat-affected zone of flame cutting leads to significant thermal deformation of the metal material, and it requires extremely high operator skill; even a slight tremor of the wrist can cause quality problems such as skewed cuts and rough edges, resulting in generally low-quality steel plate cutting. To improve the accuracy of manual cutting, related auxiliary devices have emerged in the prior art. For example, patent document CN203330558U discloses a manual flame cutting auxiliary device, including a base and a rotating shaft. One end of the rotating shaft is rotatably connected to the base via a rotating positioning block, and the other end has a mounting hole for installing a flame cutting torch. This device achieves circular cutting by rotating a shaft around the center of the base, solving the problems of uneven cuts and low yield when cutting circles by hand. However, its structure is only designed for arc cutting, and the integrated structure of the rotating shaft and the base cannot adapt to the needs of straight cutting or control the accuracy of arc cutting. Another example is patent document CN204381618U, which discloses a manual flame cutting support. It uses a structure combining a graduated measuring ruler, a center locator, and a clamp. The cutting radius is adjusted through sliding contact, and a support rod is used as the center for positioning, improving the accuracy of arc cutting. However, it lacks precise control over the cutting torch's posture, and the device's operation and adjustment are not flexible enough. Utility Model Content

[0003] In view of the above-mentioned defects or improvement needs of the existing technology, this utility model provides a manual flame cutting auxiliary device, which has a column and a horizontal bar marked with scale lines. Together with a positioning sleeve, a rotating sleeve and multiple sets of locking screws, it can realize straight line and arc cutting of workpieces, thereby improving the quality and efficiency of manual flame cutting.

[0004] To achieve the above objectives, this utility model discloses a manual flame cutting auxiliary device, comprising a base plate, a column, a positioning sleeve, a rotating sleeve, a horizontal rod, a connecting block, and a fixing ring. The bottom of the column is threadedly connected to the base plate. The positioning sleeve is fitted onto the outside of the column, and the side wall of the positioning sleeve is provided with a first locking screw for fixing the relative position of the positioning sleeve and the column. The rotating sleeve is fitted onto the outside of the positioning sleeve, and the side wall of the rotating sleeve is provided with a second locking screw for fixing the relative position of the rotating sleeve and the positioning sleeve. The rotating sleeve has symmetrical through holes on both sides of the lug plate for passing through the horizontal rod. The side wall of the rotating sleeve lug plate is provided with a third locking screw for fixing the rotating sleeve and the horizontal rod. There are two horizontal rods, one end of which is threaded to the connecting block, and the other end passes through the through hole of the rotating sleeve. The fixing ring is connected to the connecting block by bolts and is used to hold the flame gun.

[0005] Furthermore, the bottom of the base plate is provided with a magnet mounting groove, and a circular magnet is installed in the magnet mounting groove.

[0006] Furthermore, the base plate has threaded holes evenly distributed around its perimeter for mounting ejector screws, and the center of the base plate has an internal threaded hole adapted to the column.

[0007] Furthermore, both ends of the column are provided with external threads, one end of which is threaded to the central internal thread hole of the base plate, and the other end is equipped with a first anti-loosening nut.

[0008] Furthermore, the outer surfaces of the column and the horizontal bar are marked with scale lines along the length direction.

[0009] Furthermore, the upper part of the positioning sleeve is provided with threads for installing a second anti-loosening nut.

[0010] Furthermore, both ends of the horizontal rod are provided with external threads, one end is threadedly connected to the connecting block, and the other end is equipped with a third anti-loosening nut.

[0011] In summary, compared with the prior art, the above-described technical solution conceived by this utility model can achieve the following beneficial effects: (1) The manual flame cutting auxiliary device of this utility model, by tightening the second locking screw, fixes the rotating sleeve and the positioning sleeve to be relatively fixed, and can only move in a straight line direction. At the same time, by loosening the third locking screw, the horizontal rod drives the flame gun to slide in a straight line along the horizontal through holes on both sides of the rotating sleeve. By tightening the third locking screw, the horizontal rod and the rotating sleeve are fixed to be relatively fixed, locking the cutting radius. At the same time, by loosening the second locking screw, the rotating sleeve drives the flame gun to rotate freely around the axis of the positioning sleeve. The fixing ring can rotate around the bolt axis, driving the flame gun installed in the fixing ring to rotate synchronously, thereby changing the spray angle of the flame gun nozzle. This solves the problem that the existing device can only realize straight line or arc cutting and has a single function. The device of this utility model realizes the integrated switching of straight line and arc cutting functions, and can realize inclined cutting, meet diverse cutting needs, and improve the flexibility and working efficiency of the device.

[0012] (2) The manual flame cutting auxiliary device of this utility model can accurately determine the cutting length and arc radius through the scale line of the horizontal rod, improve the cutting accuracy, ensure that the cut is straight and the cut is flat, and greatly improve the cutting quality of steel plate.

[0013] (3) The manual flame cutting auxiliary device of this utility model precisely locks the cutting height by moving the positioning sleeve up and down the column with scale and tightening the first locking screw. This solves the problem that the existing device cannot accurately control the vertical distance between the flame gun and the workpiece, resulting in uneven cutting depth. This device realizes the visual and precise adjustment of the cutting height and improves the cutting quality.

[0014] (4) The manual flame cutting auxiliary device of this utility model has a simple structure, is easy to assemble and disassemble, is easy to carry, and is suitable for fixed and mobile operation scenarios. It has a wide range of applications. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a manual flame cutting auxiliary device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the front and back of the base plate of a manual flame cutting auxiliary device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the column of a manual flame cutting auxiliary device according to an embodiment of the present invention; Figure 4 This is a schematic diagram of a positioning sleeve for a manual flame cutting auxiliary device according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the rotating sleeve of a manual flame cutting auxiliary device according to an embodiment of the present invention; Figure 6 This is a schematic diagram of a horizontal bar in a manual flame cutting auxiliary device according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the connecting block of a manual flame cutting auxiliary device according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the rotation of the fixing ring bolt relative to the connecting block in a manual flame cutting auxiliary device according to an embodiment of this utility model.

[0017] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1-base plate, 2-column, 3-positioning sleeve, 4-rotating sleeve, 5-horizontal bar, 6-connecting block, 7-fixing ring, 8-first anti-loosening nut, 9-first locking screw, 10-second anti-loosening nut, 11-second locking screw, 12-third locking screw, 13-third anti-loosening nut. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0019] like Figure 1 As shown, this utility model embodiment provides a manual flame cutting auxiliary device, including a base plate 1, a column 2, a positioning sleeve 3, a rotating sleeve 4, a horizontal rod 5, a connecting block 6, and a fixing ring 7. The lower part of the base plate 1 is equipped with a replaceable circular magnet to achieve rapid magnetic positioning of the device and the workpiece. Both the column 2 and the horizontal rod 5 are marked with scale lines. Together with the positioning sleeve 3, the rotating sleeve 4, and multiple sets of locking screws, they enable straight and arc cutting, and allow for precise adjustment of the cutting height, arc radius, and cutting length, improving the quality and efficiency of manual flame cutting. Furthermore, all components are detachable and disassembled, occupying little space and being easy to carry when not in use. like Figure 1 and 2 As shown, the base plate 1 serves as the supporting foundation for the device. It is disc-shaped and made of metal, with a pre-drilled magnet mounting groove at its bottom for installing circular magnets. These magnets magnetically attract and fix the device to the surface of the metal workpiece to be cut, improving stability during the cutting process. To facilitate magnet removal, four evenly distributed small threaded holes are designed around the base plate 1 for installing ejector screws. To remove the magnets, simply tighten the ejector screws to push them out. An internal threaded hole, compatible with the column 2, is located at the center of the upper part of the base plate 1 for mounting the column 2.

[0020] like Figure 1 and 3 As shown, the column 2 has external threads at both ends. One end of the external thread forms a threaded connection with the internal threaded hole on the base plate 1, enabling the column 2 to be detachably fixed to the base plate 1. The other end of the external thread is used to install the first anti-loosening nut 8. The outer surface of the middle section of the column 2 is smooth and marked with scale lines along its length, which facilitates precise control of the height position of the positioning sleeve 3 when installing it, thereby adjusting the cutting height and adapting to the cutting needs of workpieces of different sizes.

[0021] like Figure 1 and 4 As shown, the positioning sleeve 3 is a hollow stepped shaft structure with an inner diameter matching the outer diameter of the column 2. It can be fitted onto the outside of the column 2 and can move up and down and rotate along the column 2. The bottom of the positioning sleeve 3 is a large-diameter first stepped ring with a through threaded hole on its side wall for installing the first locking screw 9. When the positioning sleeve 3 is adjusted to the target height, tightening the first locking screw 9 will cause the end of the first locking screw 9 to press against the outer surface of the column 2, thereby fixing the positioning sleeve 3 to the column 2 and preventing the positioning sleeve 3 from sliding along the axis of the column 2 during the cutting process. It can also precisely adjust the vertical distance between the fixing ring 7 and the workpiece surface, i.e., the cutting height, to ensure that the high-temperature flame emitted by the flame gun can stably act on the workpiece cutting surface and avoid uneven cut depth due to improper height. The middle section of the positioning sleeve 3 is smooth and its outer diameter is smaller than that of the first stepped ring for installing the rotating sleeve 4. The upper part of the positioning sleeve 3 is threaded for installing the second anti-loosening nut 10 to prevent the rotating sleeve 4 from falling off.

[0022] like Figure 1 and 5 As shown, the rotating sleeve 4 is a double-layer annular structure with ear plates. Its inner diameter matches the outer diameter of the positioning sleeve 3, allowing it to be fitted onto the outside of the positioning sleeve 3. The rotating sleeve 4 can rotate freely around the axis of the positioning sleeve 3, providing a rotational basis for the device to achieve arc cutting. The double-layer annular structure has through-hole threaded holes on its sidewalls for installing the second locking screw 11. Tightening the second locking screw 11 causes its end to abut against the outer surface of the positioning sleeve 3, achieving relative fixation between the rotating sleeve 4 and the positioning sleeve 3, thus enabling the device to achieve linear cutting. The cutting provides a foundation; the two ear plates of the rotating sleeve 4 are symmetrically provided with through holes, the inner diameter of which is adapted to the outer diameter of the horizontal rod 5, for installing the horizontal rod 5. The horizontal rod 5 can move axially along the horizontal through hole. At the same time, the side walls of the two ear plates are also provided with through threaded holes for installing the third locking screw 12. By tightening the third locking screw 12, the end of the third locking screw 12 can be pressed against the outer surface of the horizontal rod 5, restricting the axial displacement of the horizontal rod 5, realizing the relative fixation of the horizontal rod 5 and the rotating sleeve 4, thereby determining the cutting arc radius.

[0023] like Figure 1 and 6 As shown, there are two horizontal rods 5. The outer surface of the middle section is smooth and marked with scale lines along its length, which are used to determine the size of the arc radius or the length when cutting a straight line. Both ends of the horizontal rod 5 are provided with external threads. The end with the smaller scale value is threaded to the connecting block 6, and the other end is equipped with a third anti-loosening nut 13 to prevent the horizontal rod 5 from falling off.

[0024] like Figure 1 and 7As shown, the connecting block 6 is a block structure. One side of it is provided with an internal threaded hole that matches the horizontal rod 5 for installing the horizontal rod 5. The other side is provided with an ear plate with a connecting hole that matches the fixing ring 7. The fixing ring 7 is connected by bolts.

[0025] like Figure 1 As shown, the fixing ring 7 is a hollow annular structure used to fix the nozzle of the flamethrower. One side has a perforated lug plate, which is connected to the lug plate of the connecting block 6 via bolts passing through the mounting hole, allowing for detachable fixing of the fixing ring 7 and the connecting block 6. The inner diameter of the fixing ring 7 matches the outer diameter of the flamethrower, and the diameter of the circular hole is slightly larger than the nozzle diameter, facilitating nozzle insertion and rotation. During use, the flamethrower is secured within the fixing ring 7, achieving proper positioning and preventing skewing of the cut caused by wrist movement when manually holding the flamethrower. Figure 8 As shown, the retaining ring 7 can also rotate around the bolt at a certain angle, thereby fulfilling the requirement of bevel cutting.

[0026] In use, embed the circular magnet into the magnet mounting slot at the bottom of the base plate 1. If the magnet needs to be replaced later, it can be ejected by screwing in the ejection screw through the ejection hole on the side of the base plate 1. Next, align the lower end of the column 2 with the internal threaded hole on the base plate 1 and rotate clockwise to fix the column 2 to the base plate 1 via threaded connection. Ensure that the lower end of the scale on the column 2 has a smaller value and the upper end has a larger value. Then, slip the positioning sleeve 3 onto the upper end of the column 2 and install the first locking screw 9. Next, slip the rotating sleeve 4 onto the upper end of the positioning sleeve 3 and install the second anti-loosening nut 10, the first anti-loosening nut 8, and the second locking screw 11 in sequence. Then remove... Two horizontal rods 5 are assembled by aligning their externally threaded ends with the internally threaded holes on the connecting block 6 and rotating them clockwise. During assembly, attention should be paid to the installation direction, with the scale line closer to the end of the connecting block 6 having a smaller value and farther away from the end of the connecting block 6 having a larger value. Then, the two horizontal rods 5 in the assembled horizontal rod 5 and connecting block 6 assembly are inserted into the horizontal through holes on both sides of the rotating sleeve 4. The anti-loosening nut 2 is screwed into the protruding end of the horizontal rod 5, and then the third locking screw 12 is installed. The fixing ring 7 is then installed onto the connecting block 6 using bolts. Finally, the flame gun is clipped into the fixing ring 7, completing the assembly of the entire device and the installation of the flame gun.

[0027] After the device is assembled, straight-line cutting, arc cutting, and bevel cutting are achieved by adjusting and fixing the various components. Simultaneously, the cutting parameters are precisely controlled using a scale. Specifically, When straight-line cutting is required, the device is placed on the surface of the workpiece. The circular magnet at the bottom of the base plate 1 adheres tightly to the metal workpiece through magnetic attraction, forming a stable positioning reference. The positioning sleeve 3 is then moved up and down to determine the cutting height, and the first locking screw 9 is tightened to lock the cutting height. Next, the rotating sleeve 3 is rotated. When the axis of the fixing ring 7 (and the flame gun) is aligned with the preset straight-line cutting direction, the second locking screw 11 is tightened. The rotating sleeve 4 and the positioning sleeve 3 are fixed relative to each other, restricting the flame gun's rotational freedom and retaining only the ability to move along a straight line. The third locking screw 12 is loosened, allowing the horizontal rod 5 to slide axially along the horizontal through holes on both sides of the rotating sleeve 4. When the operator pushes the device along the preset straight line, the horizontal rod 5 drives the flame gun to move synchronously in a straight line. Simultaneously, the movement distance of the horizontal rod 5 can be read in real time through the scale lines on the horizontal rod 5, accurately determining the cutting length and achieving a stable trajectory and controllable length for straight-line cutting.

[0028] When circular arc cutting is required, the device is placed on the surface of the workpiece. The device is magnetically positioned to the workpiece by the circular magnet at the bottom of the base plate 1. The center point of the base plate 1 is the fixed rotation center for circular arc cutting. First, the positioning sleeve 3 is moved up and down to determine the cutting height. Then, the first locking screw 9 is tightened to lock the cutting height. Next, the horizontal rod 5 is moved, sliding along the through hole of the rotating sleeve 4. The length of the horizontal rod 5 extending beyond the rotating sleeve 4 is precisely controlled according to the scale lines on the horizontal rod 5. After adjusting to the target cutting radius, the third locking screw 12 is tightened, fixing the horizontal rod 5 and the rotating sleeve 4 relative to each other and locking the cutting radius. The second locking screw 11 is then loosened, allowing the rotating sleeve 4 to rotate freely around the axis of the positioning sleeve 3. This causes the horizontal rod 5, connecting block 6, and fixing ring 7 to move synchronously around the rotation center. The flame gun nozzle then moves along the arc trajectory of the fixed radius, achieving high-precision circular arc cutting.

[0029] When a bevel needs to be cut, simply rotate the retaining ring 7 by a certain angle. After loosening the bolts at both ends of the retaining ring 7, the retaining ring 7 can rotate around the bolt axis, causing the flame gun, which is fitted inside the retaining ring 7, to rotate synchronously, thereby changing the spray angle of the flame gun nozzle. According to the preset bevel angle requirement, after rotating the flame gun to the target angle, retighten the bolts of the retaining ring 7. The retaining ring 7 and the connecting block 6 are then fixed relative to each other, and the tilt angle of the flame gun is locked. This can be combined with a linear or circular arc cutting trajectory control method, so that the tilted flame gun nozzle moves along a preset trajectory, and the high-temperature flame acts on the workpiece at an tilt angle, ultimately forming a bevel cut on the workpiece that meets the angle requirements.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] In this utility model, terms indicating direction or location are used, such as top, bottom, outside, inside, parallel, vertical, left, right, up, down, etc., to indicate relative position rather than absolute position.

[0032] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A manual flame cutting auxiliary device, characterized in that, The system includes a base plate (1), a column (2), a positioning sleeve (3), a rotating sleeve (4), a horizontal bar (5), a connecting block (6), and a fixing ring (7). The bottom of the column (2) is threaded to the base plate (1). The positioning sleeve (3) is fitted on the outside of the column (2). The side wall of the positioning sleeve (3) is provided with a first locking screw (9) for fixing the relative position of the positioning sleeve (3) and the column (2). The rotating sleeve (4) is fitted on the outside of the positioning sleeve (3). The side wall of the rotating sleeve (4) is provided with a second locking screw (11) for fixing the relative position of the rotating sleeve (4) and the positioning sleeve (3). The rotating sleeve (4) has symmetrical through holes on both sides of the ear plates for passing through the horizontal rod (5). The side wall of the ear plate of the rotating sleeve (4) is provided with a third locking screw (12) for fixing the rotating sleeve (4) and the horizontal rod (5). There are two horizontal rods (5), one end of which is threaded to the connecting block (6), and the other end is inserted into the through hole of the rotating sleeve (4). The fixing ring (7) is connected to the connecting block (6) by bolts. The fixing ring (7) is used to hold the flame gun.

2. The manual flame cutting auxiliary device according to claim 1, characterized in that, The bottom of the base plate (1) is provided with a magnet mounting groove, and a circular magnet is installed in the magnet mounting groove.

3. The manual flame cutting auxiliary device according to claim 2, characterized in that, The base plate (1) has threaded holes for installing ejector screws evenly distributed around its perimeter, and the center of the base plate (1) has an internal threaded hole that matches the column (2).

4. A manual flame cutting auxiliary device according to any one of claims 1-3, characterized in that, Both ends of the column (2) are provided with external threads. One end is threaded to the center internal thread hole of the base plate (1), and the other end is equipped with a first anti-loosening nut (8).

5. A manual flame cutting auxiliary device according to any one of claims 1-3, characterized in that, The outer surfaces of the column (2) and the horizontal bar (5) are marked with scale lines along the length direction.

6. A manual flame cutting auxiliary device according to any one of claims 1-3, characterized in that, The upper part of the positioning sleeve (3) is provided with threads for installing the second anti-loosening nut (10).

7. A manual flame cutting auxiliary device according to any one of claims 1-3, characterized in that, Both ends of the horizontal rod (5) are provided with external threads. One end is threaded to the connecting block (6), and the other end is equipped with a third anti-loosening nut (13).

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