Flame cutting machine for opening double-edge crevasses

Abstract

The invention relates to the technical field of welding, and discloses a flame cutting machine for opening double-edge crevasses. The nozzle structure comprises an upper groove cutting torch and a lower groove cutting torch which are spaced in the horizontal direction and the vertical direction and correspond to the upper edge and the lower edge of a steel plate, a combustion source supply mechanism connecting the upper groove cutting torch and the lower groove cutting torch, an oxygen and acetylene input pipe, a branch guide pipe and a connecting column of an integrated pipeline, and a valve with an opening and closing valve and a pressure reducing valve. The flame cutting machine is integrated with the nozzle, the driving device comprises a transfer mechanism and a supporting mechanism, the transfer mechanism is provided with a universal wheel, an electric control piece and a movable machine body of a magnetic limiting wheel, the supporting mechanism is provided with a suspension beam, a lock, a vertical beam, a hoop and a linkage structure composed of a track plate, a sliding base, an electric motor and the like, and the cutting nozzle is driven to be close to a steel plate along an oblique line. According to the steel plate upper groove and lower groove one-time synchronous opening device, the problem of one-time synchronous opening of an upper groove and a lower groove of a steel plate is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, and in particular to a flame cutting machine for opening double-sided bevels. Background Art

[0002] In the field of steel plate 2 welding, in order to meet the requirements of the welding process for the weld pool accommodation, joint strength and tightness, it is often necessary to process the end of the steel plate 2. As shown in the external view of the steel plate 2 with double-sided bevels opened in Figure 1 After removing the upper slope block 1 and the lower slope block 3 of the steel plate 2 by using the flame cutting technology, a double-sided bevel structure is formed; the upper bevel is located at one end edge of the upper surface of the steel plate 2, and the lower bevel is located at one end edge of the lower surface, both of which are in an inclined cutting shape, forming a bevel geometric shape adapted for welding. However, the existing flame cutting technology (especially the single-nozzle semi-automatic flame cutting machine) has significant defects: First, opening double-sided bevels requires two cuts (first processing the upper bevel and then the lower bevel), resulting in a large consumption of working hours and low cutting efficiency; Second, repeated cutting is likely to cause deviations in the angle and depth consistency of the upper and lower bevels, directly affecting the filling effect of the welding pool (such as irregular weld pool accommodation space) and the joint strength (unequal distribution of welding stress), reducing the welding quality. The relevant prior art of the single-nozzle semi-automatic flame cutting machine is disclosed in the Chinese Patent Database (CN101823175B, CN204135529U).

[0003] In view of the current situation of the existing single-nozzle semi-automatic flame cutting machine, it is urgent to develop a flame cutting technical solution to solve the problem of how to achieve the one-time synchronous opening of the upper bevel and the lower bevel of the steel plate 2, so as to improve the cutting efficiency and ensure the bevel accuracy, providing a reliable pre-processing basis for the subsequent welding process. However, the technologies disclosed in the prior art (CN101823175B, CN204135529U) do not solve the above problems. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a flame cutting machine for opening double-sided bevels to solve the problem of how to achieve the one-time synchronous opening of the upper bevel and the lower bevel of the steel plate.

[0005] In the first aspect, the present invention discloses a nozzle structure, including an upper bevel nozzle and a lower bevel nozzle. There is a distance between the upper bevel nozzle and the lower bevel nozzle in both the horizontal and vertical directions. The upper bevel nozzle corresponds to the upper edge of the steel plate for cutting to form an upper bevel, and the lower bevel nozzle corresponds to the lower edge of the steel plate for cutting to form a lower bevel; both the upper bevel nozzle and the lower bevel nozzle are connected to a combustion source supply mechanism to generate flames, and the combustion source supply mechanism is used to supply the gases required for combustion to both; the driving device is used to drive the upper bevel nozzle and the lower bevel nozzle to move to the processing positions of the upper bevel and the lower bevel of the steel plate to achieve synchronous cutting of the upper and lower edges of the steel plate.

[0006] Specifically, the combustion source supply mechanism includes an oxygen input pipe and an acetylene input pipe disposed on one side thereof. One end of the acetylene input pipe is connected to an acetylene generation source, and the other end of the acetylene input pipe is connected to a first acetylene conduit and a second acetylene conduit. The first acetylene conduit and the second acetylene conduit respectively supply acetylene to the uphill nozzle and the downhill nozzle; one end of the oxygen input pipe is connected to an oxygen generation source, and the other end is divided into an uphill nozzle oxygen supply main branch and a downhill nozzle oxygen supply main branch; it also includes a connecting column that integrally fixes the acetylene input pipe and the oxygen input pipe.

[0007] More specifically, the uphill nozzle oxygen supply main branch is composed of a first preheating oxygen pipeline and a first cutting oxygen pipeline, which respectively supply preheating oxygen and cutting oxygen, and are both connected to the oxygen input pipe through a third valve; the downhill nozzle oxygen supply main branch is composed of a second preheating oxygen pipeline and a second cutting oxygen pipeline, which respectively supply preheating oxygen and cutting oxygen, and are both connected to the oxygen input pipe through a fourth valve; both the third valve and the fourth valve include an on-off valve for controlling on and off and a pressure reducing valve for pressure reduction and voltage stabilization.

[0008] In a second aspect, the present invention discloses a bilateral bevel flame cutting machine, including a nozzle structure and a driving device, and the driving device is connected to the upper nozzle structure; wherein the driving device includes a transfer mechanism and a support mechanism, the support mechanism is arranged on the transfer mechanism, and the nozzle structure is connected to the support mechanism; the transfer mechanism is used to carry the support mechanism and the nozzle structure to move on the steel plate, and the support mechanism is used to carry and position-adjust the nozzle structure.

[0009] Specifically, the transfer mechanism includes a moving body, and universal wheels are installed at the bottom of the moving body; a power indicator light, a switch, a speed adjustment button and a fuse are integrally installed on the operation panel of the moving body; a limiting arm is connected to the side of the moving body, and a limiting wheel made of magnetic material is installed at the end of the limiting arm, and the limiting wheel is fitted with the side wall of the steel plate to achieve position limiting or guiding during the moving process.

[0010] Specifically, the support mechanism includes a suspension beam, the placement rack is locked with the suspension beam, and the placement rack is detachably connected to the connecting seat; two first locks are arranged along the axial direction of the suspension beam and locked on the suspension beam; the second lock is fixed on the corresponding first lock, the vertical beam is locked in the second lock, and the hoop is connected to the corresponding vertical beam; the uphill nozzle and the downhill nozzle are respectively locked through the corresponding hoops; the placement rack of the support mechanism is connected to the surface of the moving body of the transfer mechanism.

[0011] The first connection relationship between the nozzle and the vertical beam: The nozzle is connected to the vertical beam through a welding pin.

[0012] The second connection relationship between the cutting nozzle and the vertical beam: the cutting nozzle is connected to the vertical beam through a linkage structure, the linkage structure includes a track plate, the track plate is fixedly connected to the vertical beam through a convex plate, the track plate is processed with an oblique groove consistent with the slope angle of the steel plate, and the track column of the second slide is slidably embedded in the oblique groove; the first slide is slidably connected to the track plate, and a through cavity is provided inside for the track column to move through, the second slide can slide in the vertical direction relative to the first slide, and the second slide is fixed to the clamp; the electric motor is fixed on one side of the track plate, the output shaft is connected to the rotating arm, the rotating arm is hinged to the swing arm, and the free end of the swing arm is hinged to the protrusion of the first slide; the electric motor drives the rotating arm to swing, and pushes the first slide to move along the length direction of the track plate through the swing arm, so that the second slide synthesizes an oblique motion trajectory consistent with the angle of the oblique groove under the joint action of the oblique groove and the first slide, driving the clamp and the cutting nozzle to gradually approach the steel plate along the oblique line from far to near.

[0013] The beneficial effects of the present invention are: Compared with the prior art, the present invention solves the problem of how to achieve one-time synchronous opening of the upper bevel and the lower bevel of the steel plate. The upper bevel cutting nozzle and the lower bevel cutting nozzle with a spacing in the horizontal and vertical directions are set to avoid mutual interference. The branch pipeline and valve of the combustion source supply mechanism are used to coordinately control the on-off and pressure of acetylene, preheating oxygen and cutting oxygen. The driving device is combined to drive the two cutting nozzles to move synchronously to the processing position and perform preheating and cutting operations, thereby realizing synchronous processing of the upper and lower bevels. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the NdFeB magnet product of the present invention.

[0015] Figure 2 It is a schematic diagram of the overall structure of the nozzle structure.

[0016] Figure 3 This is a diagram of the usage of the up-bevel cutting nozzle and the down-bevel cutting nozzle for cutting steel plates.

[0017] Figure 4 This is a schematic diagram of the partial structure of the combustion source supply mechanism.

[0018] Figure 5 The figure is a schematic diagram of the overall structure of a double-sided rip flame cutting machine.

[0019] Figure 6 It is a schematic diagram of the three-dimensional structure of the transfer mechanism.

[0020] Figure 7 A schematic diagram of the three-dimensional structure of the supporting mechanism.

[0021] Figure 8 It is a schematic diagram of the assembly structure of the linkage structure.

[0022] Figure 9Schematic diagram of a partial structure of a linkage structure.

[0023] Figure 10 Schematic diagram of a three-dimensional structure of a linkage structure.

[0024] Figure 11 Schematic diagram of an installation structure of a purging unit.

[0025] Figure 12 Schematic diagram of an installation structure of a quick-release mechanism.

[0026] Figure 13 Schematic diagram of a three-dimensional structure of a quick-release mechanism.

[0027] Figure 14 Schematic diagram of the layout of quick-release slots on a moving body.

[0028] In the figure, 1, uphill block; 2, steel plate; 3, downhill block; 4, acetylene input pipe; 5, oxygen input pipe; 6, third valve; 7, first valve; 8, first preheating oxygen pipeline; 9, first acetylene conduit; 10, first cutting oxygen pipeline; 11, downhill orifice cutting nozzle; 12, second valve; 13, uphill orifice cutting nozzle; 14, second preheating oxygen pipeline; 15, second acetylene conduit; 16, second cutting oxygen pipeline; 17, connecting column; 18, fourth valve; 19, suspension beam; 20, moving body; 21, power indicator light; 22, switch; 23, conducting wire; 24, limiting arm; 25, limiting wheel; 26, fuse; 27, speed adjustment button; 28, universal wheel; 29, connecting seat; 30, placement rack; 31, vertical beam; 32, second lock; 33, first lock; 34, swing arm; 35, inclined groove; 36, convex plate; 37, second sliding seat; 38, rotating arm; 39, electric motor; 40, track plate; 41, first sliding seat; 42, cavity; 43, track column; 44, insulator; 45, first conductive sheet; 46, second conductive sheet; 47, half gear; 48, toothed plate; 49, electric nozzle; 50, accommodating cavity; 51, chassis; 52, inserting cylinder; 53, column body; 54, retaining bar; 55, buffer spring; 56, notch through groove; 57, annular groove. Detailed implementation manners

[0029] In order to clearly understand the technical solution of the present application, a bilateral bevel flame cutting machine provided by the present application will be described in detail below in combination with specific embodiments and drawings.

[0030] The terms used in the following embodiments are for the purpose of describing specific embodiments only and are not intended to limit the present application. As used in the specification and claims of the present application, the singular forms "a", "an", "the above", "the", and "this" are also intended to include expressions such as "one or more", unless the context clearly indicates otherwise. It should also be understood that in the following embodiments of the present application, "at least one" and "one or more" mean one, two, or more than two.

[0031] Reference to "an embodiment" or "some embodiments" described in this specification means that a specific feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the present application. Thus, the statements "an embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc., which appear in different places in this specification, do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "comprising", "including", "having" and their variants mean "including but not limited to", unless otherwise specifically emphasized. Embodiment

[0032] This embodiment provides a nozzle structure. Refer to Figure 2-3 , wherein, Figure 2 shows a schematic diagram of the overall structure of the nozzle structure, while Figure 3 shows a usage state diagram of the uphill cutting nozzle 13 and the downhill cutting nozzle 11 for cutting the steel plate 2. It can be seen from the figure that the structure includes an uphill cutting nozzle 13 and a downhill cutting nozzle 11. There are spacings between the uphill cutting nozzle 13 and the downhill cutting nozzle 11 in both the horizontal and vertical directions to avoid mutual influence and interference. The uphill cutting nozzle 13 corresponds to the upper edge of the steel plate 2, and an uphill opening is formed after cutting the upper edge. The downhill cutting nozzle 11 corresponds to the lower edge of the steel plate 2, and a downhill opening is formed after cutting the lower edge. The uphill cutting nozzle 13 and the downhill cutting nozzle 11 are connected to a combustion source supply mechanism, and the combustion source supply mechanism is used to make the uphill cutting nozzle 13 and the downhill cutting nozzle 11 generate flames so as to complete the cutting action on the upper and lower edges of the steel plate 2. The specific structure of the combustion source supply mechanism is as follows.

[0033] Refer to Figure 2 , Figure 4 , wherein, Figure 4The figure shows a partial structural schematic diagram of a combustion source supply mechanism. As can be seen from the figure, the combustion source supply mechanism includes an oxygen input pipe 5. One side of the oxygen input pipe 5 is provided with an acetylene input pipe 4. One end of the acetylene input pipe 4 is connected to an acetylene generating source, and the other end is divided into two main branches: a first acetylene conduit 9 and a second acetylene conduit 15. The first acetylene conduit 9 is communicated with the acetylene input pipe 4 through a first valve 7; the second acetylene conduit 15 is communicated with the acetylene input pipe 4 through a second valve 12. The first acetylene conduit 9 and the second acetylene conduit 15 respectively supply acetylene to an uphill nozzle 13 and a downhill nozzle 11. The connecting column 17 is used as a pipeline integration component to integrally weld the acetylene input pipe 4 and the oxygen input pipe 5 by welding, thereby forming a compact connection structure. One end of the oxygen input pipe 5 is connected to an oxygen generating source, and the other end is divided into two main branches: an oxygen supply main branch for the uphill nozzle 13 and an oxygen supply main branch for the downhill nozzle 11. The oxygen supply main branch for the uphill nozzle 13 is composed of a first preheating oxygen pipeline 8 and a first cutting oxygen pipeline 10, which respectively supply preheating oxygen and cutting oxygen to the uphill nozzle 13; both the first preheating oxygen pipeline 8 and the first cutting oxygen pipeline 10 are communicated with the oxygen input pipe 5 through a third valve 6. The oxygen supply main branch for the downhill nozzle 11 is composed of a second preheating oxygen pipeline 14 and a second cutting oxygen pipeline 16, which respectively supply preheating oxygen and cutting oxygen to the downhill nozzle 11; both the second preheating oxygen pipeline 14 and the second cutting oxygen pipeline 16 are communicated with the oxygen input pipe 5 through a fourth valve 18. The structural composition of the third valve 6 and the fourth valve 18 is a front-mounted opening and closing valve (such as a DJ12(OXY) cutting oxygen pressure reducing valve) and a rear-mounted pressure reducing valve (such as an oxygen special ball valve). The opening and closing valve and the pressure reducing valve are used to control the on-off first and then reduce the pressure and stabilize the pressure. The uphill nozzle 13 and the downhill nozzle 11 are moved to the uphill and downhill processing positions of the steel plate 2 through a driving device.

[0034] The general operation process of Embodiment 1 of the present invention is as follows: In the preheating stage, the first valve 7 and the second valve 12 are electrically opened (to control the on-off of acetylene), and the opening and closing valves of the third valve 6 and the fourth valve 18 corresponding to the uphill and downhill are opened (to control the on-off of preheating oxygen). Acetylene and preheating oxygen are mixed in the nozzle to preheat the steel plate 2. In the cutting operation (simultaneously blowing slag), the opening and closing valves of the third valve 6 and the fourth valve 18 in the cutting oxygen branch corresponding to the uphill and downhill are opened (to control the on-off of cutting oxygen). High-pressure cutting oxygen is ejected from the nozzle to simultaneously blow away the molten slag, and cooperate with the combustion of acetylene to complete the groove cutting of the steel plate 2.

[0035] Compared with the prior art, the present invention solves the problem of how to achieve the one-time synchronous opening of the upper and lower bevels of the steel plate 2. By setting the upper bevel cutting nozzle 13 and the lower bevel cutting nozzle 11 with a spacing in the horizontal and vertical directions to avoid mutual interference, and using the shunt pipeline and valve of the combustion source supply mechanism to jointly control the on-off and pressure of acetylene, preheating oxygen and cutting oxygen. Combined with the driving device to drive the two nozzles to move synchronously to the processing position and perform preheating and cutting operations, the synchronous processing of the upper and lower bevels is realized. Embodiment

[0036] This embodiment provides a flame cutting machine for opening double-sided bevels. Refer to Figure 5 , which shows the overall structural schematic diagram of the flame cutting machine for opening double-sided bevels. It can be seen from the figure that the flame cutting machine includes the nozzle structure in Embodiment 1, and the nozzle structure is connected to the driving device. Specifically, the driving device is composed of a transfer mechanism and a support mechanism. The support mechanism is arranged on the transfer mechanism, and the nozzle structure is connected to the support mechanism. The transfer mechanism is used to carry the support mechanism and the nozzle structure to move on the steel plate 2, so as to cooperate with the nozzle structure to perform flame cutting on the steel plate 2; the support mechanism is used to carry and position-adjust the nozzle structure.

[0037] Refer to Figure 5 and Figure 6 , wherein, Figure 6 which shows the three-dimensional structural schematic diagram of the transfer mechanism. It can be seen from the figure that the transfer mechanism includes a moving body 20. The moving body 20 is the core carrier of the transfer mechanism, and universal wheels 28 are installed at its bottom. The flexible movement of the transfer mechanism is realized through the rolling of the universal wheels 28. On the operation panel of the moving body 20, a power indicator light 21, a switch 22, a speed adjustment button 27, and a fuse 26 are integrally installed: the power indicator light 21 is used to display the power-on state of the device; the switch 22 controls the start and stop of the device; the speed adjustment button 27 adjusts the moving speed of the transfer mechanism; the fuse 26 is used as an overload protection element to ensure the safety of the circuit. The above electrical components are connected through the circuit inside the moving body 20, and are externally connected to the power supply through the conducting wire 23 to form a complete power supply and control circuit. A limiting arm 24 is connected to the side of the moving body 20, and a limiting wheel 25 is installed at the end of the limiting arm 24; the limiting wheel 25 is made of a magnetic material and is adapted to be in contact with the side wall of the steel plate 2 during operation, and the position limiting or guiding function during the moving process is realized by magnetic adsorption.

[0038] Refer to Figure 5 and Figure 7 , wherein, Figure 7The figure shows a three-dimensional structural schematic diagram of a support mechanism. As can be seen from the figure, the support mechanism includes a suspension beam 19, and the suspension beam 19 is the main load-bearing beam of the support mechanism. The placement rack 30 is fixed on the suspension beam 19 through a locking structure (such as bolts, buckles, etc.); the placement rack 30 and the connecting seat 29 are detachably connected (such as threaded connection, or a combination of plugging and locking pins, etc.), which is convenient for assembly and disassembly. Two first locks 33 are connected to the suspension beam 19 and arranged along the axial direction of the suspension beam 19. The uphill cutting nozzle 13 and the downhill cutting nozzle 11 are adaptively connected to the first locks 33. When the first locks 33 are in the unlocked state, the cutting nozzles can move freely along the axial direction of the suspension beam 19 to adjust the horizontal position; when in the locked state, the cutting nozzles are relatively fixed to the suspension beam 19 to ensure cutting stability. The second lock 32 is fixedly connected to the first lock 33, and the vertical beam 31 is locked in the second lock 32. The uphill cutting nozzle 13 and the downhill cutting nozzle are connected to the vertical beam 31 through welding pins; when the second lock 32 is in the unlocked state, the cutting nozzles can move freely along the vertical direction of the vertical beam 31 to adjust the vertical height; when in the locked state, the cutting nozzles are relatively fixed to the vertical beam 31 to adapt to different cutting conditions. The uphill cutting nozzle 13 and the downhill cutting nozzle 11 are respectively locked by two clamping rings. The clamping rings surround the cutting nozzles and are fixed by bolts, locks, etc.; the quick-release design of the clamping rings facilitates the installation, adjustment and maintenance of the cutting nozzles. And the placement rack 30 of the support mechanism is connected to the surface of the moving body 20 of the transfer mechanism.

[0039] To solve the problems such as slag hanging on the slope cut due to the fixed position of the cutting nozzle when the existing welding pin structure of the connecting clamping ring cuts the slope of the steel plate 2, a solution is provided to replace the welding pin with a linkage structure. This linkage structure can drive the uphill cutting nozzle 13 or the downhill cutting nozzle 11 to gradually approach the steel plate 2 along an oblique line from far to near, so that the cutting nozzle maintains the best action distance between the flame core and the surface of the steel plate 2 throughout the cutting process to achieve stable and efficient slope cutting. The specific structure of the linkage structure is as follows.

[0040] Refer to Figure 8-10 , in which, Figure 8 The figure shows an assembly structure schematic diagram of the linkage structure, Figure 9 The figure shows a partial structure schematic diagram of the linkage structure, Figure 10The figure shows a schematic three-dimensional structure of the linkage structure. As can be seen from the above figures, the linkage structure includes a track plate 40, which is fixedly connected to the convex plate 36 by means of welding, bolt fastening, etc., and the convex plate 36 is fixedly connected to the vertical beam 31 (such as by welding or bolt connection). Therefore, the track plate 40 is indirectly fixedly connected to the vertical beam 31 through the convex plate 36, forming a fixed support matrix for the linkage structure and providing a spatial reference for the movement of the remaining components. An inclined groove 35 (with a preset inclined line angle, which is the same as the slope angle of the steel plate 2) is machined on the track plate 40, and the track column 43 of the second slide 37 is slidably embedded in the inclined groove 35, so that the movement track of the track column 43 is limited to an inclined line. The first slide 41 is slidably connected to the track plate 40 and can reciprocate along the length direction of the track plate 40, constituting the lateral movement degree of freedom of the linkage structure. A through cavity 42 is provided inside the first slide 41, and the track column 43 of the second slide 37 movably passes through the cavity 42. The second slide 37 can slide relative to the first slide 41 in the vertical direction, constituting the vertical movement degree of freedom of the linkage structure; the second slide 37 is fixedly connected to the hoop. The electric motor 39 is fixedly connected to one side of the track plate 40, a rotating arm 38 is fixedly connected to the output shaft of the electric motor 39, the rotating arm 38 is hinged to a swing arm 34, and the free end of the swing arm 34 forms a hinge with a protrusion on the first slide 41. The electric motor 39 outputs torque to drive the rotating arm 38 to swing around the hinge point; the rotating arm 38 drives the swing arm 34 to move, and the swing arm 34 pushes the first slide 41 to move along the length direction of the track plate 40 through the hinge. Under the combined limiting action of the inclined groove 35, the track column 43, and the moving first slide 41, the lateral movement and vertical sliding of the second slide 37 synthesize an inclined line movement track that is the same as the angle of the inclined groove 35, driving the hoop and the cutting torch fixed to the second slide 37 to realize an inclined line movement that gradually approaches the steel plate 2 from far to near.

[0041] Combined with the above connection relationship, the working principle of the linkage structure is as follows: First, the electric motor 39 operates to drive the rotating arm 38 to swing, which is transmitted through the swing arm 34 to make the first slide 41 move horizontally along the track plate 40; Second, the track column 43 of the second slide 37 slides along the inclined groove 35 (the inclined line angle is adapted to the slope of the steel plate 2) of the track plate 40, and at the same time generates a vertical displacement in the cavity 42 of the first slide 41; Third, the inclined line sliding and vertical displacement of the track column 43, combined with the lateral movement of the first slide 41, drive the second slide 37 to synthesize an inclined line movement (the track is the same as the angle of the inclined groove 35); Fourth, the second slide 37 drives the hoop and the cutting torch to gradually approach the steel plate 2 along the inclined line from far to near, maintaining the best action distance of the flame core throughout the process and realizing stable slope cutting.

[0042] By setting the linkage mechanism in the present invention, the following beneficial effects exist: The linkage mechanism of the present invention drives the cutting nozzle to gradually approach the steel plate 2 along an oblique line, so that the cutting nozzle maintains the optimal working distance of the flame core throughout the process, solves the defect of slag hanging on the cut, improves the groove accuracy and surface quality of slope cutting, adapts to thick steel plates 2 and large-angle slope cutting, and ensures the stability of the flame cutting process.

[0043] After preheating the steel plate 2 through the combustion source supply mechanism and the cutting nozzle, although slag blowing is carried out on the steel plate 2 by means of high-pressure oxygen and acetylene during flame cutting, slag blowing can only be carried out locally on the cutting part. Therefore, the present application optimizes the linkage structure: the linkage structure further includes a purging unit, and the purging unit is connected to the second slide 37. When the upper groove cutting nozzle 13 and the lower groove cutting nozzle 11 are far away from the steel plate 2, the linkage structure can drive the purging unit to purge the cut or to-be-cut part of the steel plate 2. The specific structure of the purging unit is as follows.

[0044] Reference Figure 11 , which shows the installation structure schematic diagram of the purging unit. It can be seen from the figure that the purging unit includes a toothed plate 48, and the toothed plate 48 is fixedly connected to the first slide 41 (such as by welding, bolt fastening, etc.). The half gear 47 is movably connected to the second slide 37 (such as through a rotating shaft and bearing cooperation, so that the half gear 47 can rotate relative to the second slide 37 around its own axis). The tooth profile structure of the toothed plate 48 is meshed and matched with the tooth profile of the half gear 47 to form a gear transmission pair. One end of the insulator 44 penetrates the second slide 37 and is concentrically fixed to the half gear 47. The electric nozzle 49 is installed on the insulator 44 (such as fixed by a card slot, thread, etc.); the first conductive sheet 45 is installed on the insulator 44, and at the same time the first conductive sheet 45 is electrically connected to the electric nozzle 49 to form a part of the conductive circuit. The second conductive sheet 46 is installed on the second slide 37, and the second conductive sheet 46 is electrically connected to an external power supply to form another part of the conductive circuit; when the electric nozzle 49 is aligned with the cut or to-be-cut part of the steel plate 2, the first conductive sheet 45 and the second conductive sheet 46 can be in contact and cooperate to achieve electrical connection. When the track column 43 moves to the highest point of the inclined groove 35: the first slide 41 drives the toothed plate 48 to move linearly, and drives the half gear 47 to rotate through gear meshing; the half gear 47 synchronously drives the insulator 44 and the electric nozzle 49 to rotate coaxially, so that the electric nozzle 49 switches to a posture opposite to the "cut part" or "to-be-cut part" of the steel plate 2. When the electric nozzle 49 rotates to be opposite to the "cut part" or "to-be-cut part": the first conductive sheet 45 on the insulator 44 contacts the second conductive sheet 46 on the second slide 37 to form a closed circuit.

[0045] The present invention has the following beneficial effects by setting the purging unit: Through the mechanical transmission of the linkage between the position of the trajectory column 43, the toothed plate 48, and the half gear 47, as well as the electrical contact control of the first conductive sheet 45 and the second conductive sheet 46, the present invention realizes the three-stage intelligent coordination of "pre-blowing before cutting, stopping blowing during cutting, and cleaning slag after cutting": When waiting for cutting, the trajectory column 43 is at the highest point of the inclined groove 35, and the electric nozzle 49 is aligned with the part to be cut for large-range blowing (while the uphill nozzle 13 and the downhill nozzle 11 preheat the steel plate 2 at this time). During the cutting process of the uphill nozzle 13 and the downhill nozzle 11 on the steel plate 2, the electric nozzle 49 moves away and automatically stops blowing to avoid interference (of course, the flame ejected by the uphill nozzle 13 and the downhill nozzle 11 themselves at this time can realize local blowing of the cutting part). After cutting, it is aligned with the cut part for blowing (to remove slag).

[0046] Regarding the problem that it is difficult to quickly disassemble and assemble the placement rack 30 and the moving body 20, referring to Figure 12 , what is shown is a schematic diagram of the installation structure of the quick-disassembly mechanism. As can be seen from the figure, by setting a quick-disassembly mechanism on the placement rack 30 that is connected to the moving body 20, the quick disassembly and assembly of the two are realized. The specific structure of the quick-disassembly mechanism is as follows.

[0047] Referring to Figure 12-14 , Figure 13 , what is shown is a schematic three-dimensional structure diagram of the quick-disassembly mechanism, Figure 14 , what is shown is a schematic diagram of the layout of the quick-disassembly groove on the moving body 20. The quick-disassembly mechanism includes an insertion cylinder 52. The insertion cylinder 52 is matched with the connecting seat 29 in a plug-in connection manner to realize the preliminary positioning of the placement rack 30. There is a notch through groove 56 on the moving body 20. The outer diameter of the column body 53 at the lower end of the insertion cylinder 52 is slidably adapted to the circular groove section of the notch through groove 56 (it can freely pass through the circular groove in the vertical direction to provide vertical movement freedom); the placement rack 30 is fixedly connected to the column body 53, and the stop bar 54 is fixedly connected to the column body 53 and is located below the placement rack 30. The outer dimension of the stop bar 54 is slidably adapted to the notch section of the notch through groove 56 (when the stop bar 54 is aligned with the notch, it can pass through the notch through groove 56 synchronously with the column body 53 and enter the accommodation cavity 50 on the moving body 20). The upper end of the buffer spring 55 is fixedly connected to the lower end surface of the column body 53, and the lower end of the buffer spring 55 is fixedly connected to the upper end surface of the chassis 51 (such as by welding, bolt fastening, or hook connection, so that the spring supports the column body 53 in its natural state and can store energy under compression after installation). The chassis 51 is provided with a convex structure (such as an annular flange) in the circumferential direction, which is rotationally adapted to the annular groove 57 in the accommodation cavity 50.

[0048] Installation phase of the quick-release mechanism: first, align the retaining bar 54 with the notch of the notch slot 56, so that the column 53, retaining bar 54 assembly is axially aligned with the notch slot 56; then, apply downward force to press the placement rack 30, and the column 53 and retaining bar 54 simultaneously pass through the notch slot 56 and enter the accommodating chamber 50. At this time, the buffer spring 55 is squeezed by the column 53 and the chassis 51 and compressed (storing elastic reset force).

[0049] The locking stage of the quick-release mechanism: first, rotate the column 53 (driving the baffle 54 to rotate synchronously) to make the circumferential position of the baffle 54 disengage from the notch area of the notch groove 56 (the baffle 54 is aligned with the top plane of the accommodating chamber 50); then, release the placement rack 30, and the buffer spring 55 rebounds and stretches, pushing the column 53 to move upward until the baffle 54 is clamped on the top inner wall of the accommodating chamber 50, thereby realizing the axial locking of the placement rack 30 and the mobile body 20 (the engagement of the baffle 54 with the top of the accommodating chamber 50 limits the upward movement of the column 53, and the buffer spring 55 maintains the clamping force).

[0050] The unlocking stage of the quick-release mechanism: first, press the placement rack 30 downward to compress the buffer spring 55, so that the blocking bar 54 moves down to the height of the notch slot 56; then, rotate the column 53 in the opposite direction to align the blocking bar 54 with the notch of the notch slot 56; finally, pull out the column 53 and the placement rack 30 upward to complete the quick disassembly.

[0051] The present invention provides the following beneficial effects by providing a quick release mechanism: The quick-release mechanism of the present invention realizes the rapid disassembly and assembly of the placement rack 30 and the mobile body 20 through the mechanical linkage logic of "column 53, baffle bar 54 alignment and groove penetration, buffer spring 55 compression and energy storage, rotation and displacement and clamping"; the buffer spring 55 not only assists in the elastic concession during installation, but also ensures the continuous clamping force after locking, and combined with the rotation adaptation of the chassis 51, the locking reliability is improved.

[0052] The overall workflow of the present invention is roughly as follows: Step 1, the quick release mechanism quickly locks the placement rack 30 and the mobile body 20 through the grooves of the column 53 and the baffle 54, and rotates and clamps, completing the assembly of the support mechanism and the transfer mechanism; the support mechanism adjusts the horizontal and vertical positions of the cutting nozzle through the lock, and the clamp locks the cutting nozzle.

[0053] Step 2: The electric motor 39 of the linkage structure drives the swing arm 38 and the rocker arm 34, driving the first slide 41 to move horizontally; the track column 43 of the second slide 37 slides along the inclined groove 35 (adapting to the slope of the steel plate 2) and vertically displaces, synthesizing an oblique line trajectory, causing the cutting nozzle to approach the steel plate 2 along the oblique line and maintaining the optimal distance of the flame core. When the track column 43 reaches the highest point of the inclined groove 35, the toothed plate 48 and the half gear 47 are linked, and the electric nozzle 49 rotates to blow (the conductive sheet contacts and is energized) towards the part to be cut; at the same time, the combustion source supply mechanism opens the acetylene and preheating oxygen valves, and the mixed gas of the cutting nozzle preheats the steel plate 2.

[0054] Step 3: The linkage structure continuously drives the cutting nozzle to feed along the oblique line; the combustion source opens the cutting oxygen branch, and high-pressure oxygen cooperates with acetylene combustion to synchronously complete the cutting of the upper and lower grooves, and the cutting nozzle flame realizes local slag blowing. When the track column 43 moves down, the blowing unit moves away from the cutting nozzle, the conductive sheet separates, and the electric nozzle 49 automatically stops blowing to avoid interference.

[0055] Step 4: After cutting is completed, the track column 43 returns to the highest point of the inclined groove 35, and the blowing unit is linked again, and the electric nozzle 49 rotates to blow and clean the slag towards the cut part.

[0056] Step 5: The transfer mechanism moves through the universal wheels 28 and is guided by the limit wheels 25 (magnetic), and the equipment repeats the processes of "preparation, cutting, and slag cleaning" until all the grooves of the steel plate 2 are processed.

Claims

1. A bilateral bevel flame cutting machine, characterized in that: It includes a nozzle structure, and a driving device is connected to the nozzle structure; the driving device includes a transfer mechanism and a support mechanism, the support mechanism is arranged on the transfer mechanism, and the nozzle structure is connected to the support mechanism; the transfer mechanism is used to carry the support mechanism and the nozzle structure to move on the steel plate, and the support mechanism is used to carry and position-adjust the nozzle structure; the nozzle structure includes an upper bevel cutting nozzle and a lower bevel cutting nozzle, there are distances between the upper bevel cutting nozzle and the lower bevel cutting nozzle in both the horizontal and vertical directions, the upper bevel cutting nozzle corresponds to the upper edge of the steel plate for cutting to form an upper bevel, and the lower bevel cutting nozzle corresponds to the lower edge of the steel plate for cutting to form a lower bevel; both the upper bevel cutting nozzle and the lower bevel cutting nozzle are connected to a combustion source supply mechanism to generate flames; the support mechanism includes a suspension beam, a placement rack is locked to the suspension beam, and the placement rack is detachably connected to a connecting seat; two first locks are arranged along the axial direction of the suspension beam and locked on the suspension beam; a second lock is fixed on the corresponding first lock, a vertical beam is locked in the second lock, there is a linkage structure between the hoop and the vertical beam, a convex plate of the linkage structure is connected to the vertical beam, and a second sliding seat of the linkage structure is connected to the hoop; the upper bevel cutting nozzle and the lower bevel cutting nozzle are respectively locked in the corresponding hoops; the placement rack of the support mechanism is connected to the surface of the moving body of the transfer mechanism; the linkage structure can link the hoop and the upper bevel cutting nozzle or the lower bevel cutting nozzle corresponding to the hoop to gradually approach the steel plate along an oblique line from far to near by means of an inclined groove and the second sliding seat, the first sliding seat, an electric motor, a rotating arm, and a swing arm.

2. The bilateral bevel flame cutting machine according to claim 1, characterized in that: The transfer mechanism includes a moving body, and universal wheels are installed at the bottom of the moving body; a power indicator light, a switch, a speed adjustment button, and a fuse are integrally installed on the operation panel of the moving body; a limiting arm is connected to the side of the moving body, and a limiting wheel made of a magnetic material is installed at the end of the limiting arm, and the limiting wheel is fitted against the side wall of the steel plate to achieve position limiting or guiding during the moving process.

3. The bilateral bevel flame cutting machine according to claim 1, characterized in that: The linkage structure includes a track plate, the track plate is fixedly connected to the vertical beam through a convex plate, an inclined groove with the same angle as the slope of the steel plate is machined on the track plate, and a track column of the second sliding seat is slidably embedded in the inclined groove; the first sliding seat is slidably connected to the track plate, and a through cavity for the track column to pass through is arranged inside, the second sliding seat can slide vertically relative to the first sliding seat, and the second sliding seat is fixed to the hoop; an electric motor is fixed on one side of the track plate, the output shaft is connected to a rotating arm, the rotating arm is hinged to a swing arm, and the free end of the swing arm is hinged to a protrusion of the first sliding seat; the electric motor drives the rotating arm to swing, and pushes the first sliding seat to move along the length direction of the track plate through the swing arm, so that the second sliding seat synthesizes an oblique line movement track consistent with the angle of the inclined groove under the combined action of the inclined groove and the first sliding seat, driving the hoop to gradually approach the steel plate along an oblique line from far to near.

4. The bilateral-bevel flame cutting machine according to claim 1, wherein: The combustion source supply mechanism includes an oxygen input pipe and an acetylene input pipe arranged on one side of it, one end of the acetylene input pipe is connected to an acetylene generating source, the other end of the acetylene input pipe is connected to a first acetylene conduit and a second acetylene conduit, and the first acetylene conduit and the second acetylene conduit respectively supply acetylene to the upper bevel cutting nozzle and the lower bevel cutting nozzle; one end of the oxygen input pipe is connected to an oxygen generating source, and the other end is divided into an oxygen supply main branch for the upper bevel cutting nozzle and an oxygen supply main branch for the lower bevel cutting nozzle; it also includes a connecting column for integrally fixing the acetylene input pipe and the oxygen input pipe.

5. The flame cutting machine for making bilateral bevels according to claim 4, wherein: The uphill nozzle oxygen delivery main branch is composed of a first preheating oxygen pipeline and a first cutting oxygen pipeline, which respectively transport preheating oxygen and cutting oxygen, and are both connected to the oxygen input pipe through a third valve; the downhill nozzle oxygen delivery main branch is composed of a second preheating oxygen pipeline and a second cutting oxygen pipeline, which respectively transport preheating oxygen and cutting oxygen, and are both connected to the oxygen input pipe through a fourth valve; both the third valve and the fourth valve include an opening and closing valve for controlling on-off and a pressure reducing and stabilizing valve for reducing pressure and stabilizing pressure.

Images