Automatic cutting device for machining

Abstract

The invention relates to the technical field of metal cutting, and discloses an automatic cutting device for machining, which comprises a mechanical arm, a laser cutting machine is arranged at the moving end of the mechanical arm, a positioner is arranged at the side part of the mechanical arm, a workpiece platform is detachably mounted at the moving end of the positioner, and a clamping mechanism for clamping a pipe fitting is movably mounted on the workpiece platform. According to the scheme, the driving motor drives the center gear to rotate through the transmission belt, the first toothed sliding plate and the second toothed sliding plate are synchronously driven to slide in the opposite directions, the alternate shielding function of the first baffle and the second baffle is achieved, and therefore the pipe fitting can be clamped conveniently and rapidly. The steering racks are symmetrically arranged, and the moving directions of the two advancing shafts are opposite, so that the two heat dissipation gears obtain the same steering angular speed, it is ensured that the first baffle and the second baffle are always kept in a parallel state in the rotating process, when meeting, the first baffle and the second baffle automatically rotate from the transverse direction to the vertical direction, and the mechanical collision risk is avoided.

Description

Technical Field

[0001] This invention relates to the field of metal cutting technology, and more specifically, to an automatic cutting device for machining. Background Technology

[0002] In related technologies, during metal laser cutting, the high-temperature molten metal, under the combined effects of airflow disturbance and microscopic inhomogeneities on the material surface, generates radially spreading sparks. While these sparks pose a certain degree of danger, their energy is dispersed, and the impact force per unit area is relatively controllable. However, when laser cutting is applied to metal pipes, their structural characteristics trigger a more severe spark jet pattern: the confined flow channel formed by the pipe opening or pre-machined holes produces a nozzle-like focusing effect, accelerating the accumulation of molten metal and high-temperature gas, forming a high-speed, high-density beam jet. This beam jet spark has a significantly enhanced impact force per unit area, and its destructive power far exceeds that of ordinary radial sparks. Specifically, it exhibits stronger penetration and a longer range, easily igniting surrounding combustibles or causing burns to operators.

[0003] To address the hazards of jet sparks, common existing solutions include using refractory fiber felt to directly block the spark path and fixing it to both ends of the pipe. However, refractory fiber felt itself has extremely low stiffness and cannot be self-supporting, requiring mechanical fixation via anchoring structures. This is particularly problematic when cutting irregularly shaped metal pipes from multiple angles, making the operation cumbersome and time-consuming. Furthermore, the metal anchors are prone to sintering and bonding with the fiber felt at high temperatures, leading to difficulties in subsequent disassembly. Therefore, an automatic cutting device for machining is proposed. Summary of the Invention

[0004] This invention provides an automatic cutting device for machining, which can solve the problem mentioned in the background art of using refractory fiber felt to directly block the spark jet path. However, the refractory fiber felt itself has extremely low rigidity and cannot be self-supporting. It must rely on anchoring structures for mechanical fixation. Especially when cutting irregular metal pipes in multiple directions, the operation is cumbersome and time-consuming. In addition, the metal anchors are prone to sintering and sticking to the fiber felt at high temperatures, which leads to difficulties in subsequent disassembly.

[0005] To achieve the above objectives, this solution provides an automatic cutting device for machining, including a robotic arm, a laser cutting machine at the moving end of the robotic arm, a positioner at the side of the robotic arm, and a workpiece platform detachably mounted at the moving end of the positioner. The workpiece platform is characterized by a clamping mechanism for holding pipe fittings, the clamping mechanism including a clamping plate and a fixing bolt, and a baffle plate slidably mounted on the clamping plate for blocking the bundle of sparks from the pipe fitting opening.

[0006] Optionally, the clamping plate has two round holes at its end, through which a fixing bolt passes. The fixing bolt is a bolt with a threaded section at the bottom. The workpiece platform has a threaded hole on its surface, and the fixing bolt is threadedly connected to the workpiece platform.

[0007] Optionally, a second baffle is slidably disposed on the clamping plate, and an alternation mechanism is also provided on the clamping plate for alternating use of the first baffle and the second baffle; the alternation mechanism includes a drive motor fixedly mounted on the upper surface of the clamping plate, a toothed slide plate first and a toothed slide plate second slidably disposed on both sides of the clamping plate, a central gear rotatably disposed in the middle of the clamping plate, the toothed slide plate first and the toothed slide plate second meshing with the central gear, and a transmission belt is sleeved on the shaft of the central gear and the output shaft of the drive motor.

[0008] Optionally, the first baffle is connected to the bottom of the first toothed slide plate; the second baffle is connected to the bottom of the second toothed slide plate.

[0009] Optionally, both the toothed slide plate one and the toothed slide plate two are provided with sliding guide rails at their bottoms, a sliding handle is slidably installed in the sliding guide rails, a travel shaft is rotatably installed at the bottom of the sliding handle, and a sliding groove is provided on the clamping plate to guide the movement of the travel shaft.

[0010] Optionally, the sliding groove is configured as a Y-shaped sliding groove, which includes a working straight groove and a bifurcated groove. The working straight groove is connected to the center of the bifurcated groove. When the traveling shaft is located at the bifurcation end of the bifurcated groove, it is far away from the pipe opening. When the traveling shaft is located in the working straight groove, it is close to the pipe opening.

[0011] Optionally, a torsion spring is fitted on the top of the travel shaft, with one end of the torsion spring engaging with the travel shaft and the other end engaging with the sliding handle.

[0012] Optionally, a cooling gear is coaxially fixedly mounted on the travel shaft, and a steering rack is symmetrically mounted on the bottom of the clamping plate, with the cooling gear and the steering rack intermittently meshing.

[0013] Optionally, a nutation striking mechanism is provided on the traveling shaft to handle the residual spark slag on the first and second baffles. The nutation striking mechanism includes a nutation wheel fixedly installed on the traveling shaft and a reciprocating slide cylinder slidably sleeved on the outside of the nutation wheel. Two locking blocks are fixedly installed on the inner wall of the reciprocating slide cylinder. The nutation wheel is slidably engaged with the two locking blocks. A striking arm is rotatably installed on the back side of both the first and second baffles. A bracket is fixedly installed in the middle of each of the two striking arms. The other ends of the two brackets are respectively hinged to the first and second baffles.

[0014] Optionally, the top of the striking arm abuts against the bottom of the reciprocating slide, and a tension spring is engaged in the middle of both striking arms. The other ends of the two tension springs are engaged with the back sides of baffle one and baffle two, respectively.

[0015] Through the above technical solution, the automatic cutting device for machining provided by this solution, when in use: The drive motor drives the central gear to rotate via the transmission belt, which in turn drives the toothed slide plate one and the toothed slide plate two to slide in opposite directions, thereby realizing the alternating blocking function of the baffle plate one and the baffle plate two. Because the steering racks are symmetrically arranged and the two travel shafts move in opposite directions, the two cooling gears obtain the same angular velocity, ensuring that baffle one and baffle two remain parallel during rotation. When baffle one and baffle two meet, they automatically rotate from the horizontal to the vertical, avoiding the risk of mechanical collision. The rotating action is automatically triggered during the movement of the travel shaft to help dissipate heat. The torsion spring enables the travel shaft to automatically reset. The nutating striking mechanism drives the striking arm to periodically strike the back of the baffle through the nutating wheel and the locking block of the reciprocating slide. This effectively removes residual spark slag. The tension spring ensures that the striking arm resets quickly, forming a self-cleaning closed loop.

[0016] Other features and advantages of this solution will be described in detail in the following detailed implementation section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention.

[0018] Figure 2 This is a three-dimensional structural diagram of the workpiece platform of the present invention.

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of the clamping plate of the present invention.

[0020] Figure 4 This is a three-dimensional structural diagram of the fixing bolt of the present invention.

[0021] Figure 5 For the present invention Figure 3 A magnified structural diagram at point A.

[0022] Figure 6 This is a schematic diagram of the sliding groove structure of the present invention.

[0023] Figure 7 This is a schematic diagram of the nutation striking mechanism of the present invention.

[0024] Figure 8 This is a schematic diagram of the structure of the first baffle and the second baffle of the present invention when they are parallel to each other.

[0025] Explanation of reference numerals in the attached drawings: 101, robotic arm; 102, laser cutting machine; 103, positioner; 104, workpiece platform; 201, clamping plate; 202, fixing bolt; 203, baffle one; 204, baffle two; 205, drive motor; 206, toothed slide plate one; 207, toothed slide plate two; 208, center gear; 209, transmission belt; 301, sliding guide rail; 302, sliding handle; 303, traveling shaft; 304, sliding groove; 3041, working straight groove; 3042, bifurcated groove; 305, torsion spring; 306, cooling gear; 307, steering rack; 401, nutation wheel; 402, reciprocating slide; 403, locking block; 404, striking arm; 405, bracket; 406, tension spring. Detailed Implementation

[0026] To make the above-mentioned objectives, features and advantages of this solution more apparent and understandable, the specific implementation methods of this solution will be described in detail below with reference to the accompanying drawings.

[0027] According to some embodiments of this solution, an automatic cutting device for machining is provided, see reference. Figures 1-8 As shown, the automatic cutting device for machining includes a robotic arm 101, a laser cutter 102 mounted on the moving end of the robotic arm 101, and a positioner 103 mounted on the side of the robotic arm 101. The robotic arm 101, the laser cutter 102, and the positioner 103 are all products of existing technology in the field, and their specific usage methods and principles will not be described in detail here.

[0028] Please see Figure 2 The movable end of the positioner 103 is detachably equipped with a workpiece platform 104. A clamping mechanism for clamping pipe fittings is movably installed on the workpiece platform 104. The clamping mechanism includes a clamping plate 201 and a fixing bolt 202. A baffle 203 for blocking the bundle of sparks at the pipe fitting opening is slidably arranged on the clamping plate 201.

[0029] Thus, by controlling the movement of the laser cutting machine 102 through the robotic arm 101, the pipe at the end of the positioner 103 can be freely cut. The positioner 103 can drive the workpiece platform 104 to rotate, thereby changing the contact surface between the pipe and the laser cutting machine 102, thus making the pipe cut more flexibly.

[0030] Specifically, the clamping plate 201 has two round holes at its end, and the fixing bolt 202 passes through the round holes. The fixing bolt 202 is a bolt with a threaded section at the bottom. The workpiece platform 104 has a threaded hole on its surface, and the fixing bolt 202 is threadedly connected to the workpiece platform 104.

[0031] A second baffle 204 is slidably disposed on the clamping plate 201. An alternation mechanism is also provided on the clamping plate 201 for alternating use of the first baffle 203 and the second baffle 204. The alternation mechanism includes a drive motor 205 fixedly mounted on the upper surface of the clamping plate 201. A toothed slide plate 206 and a toothed slide plate 207 are slidably mounted on both sides of the clamping plate 201. A central gear 208 is rotatably mounted in the middle of the clamping plate 201. The toothed slide plate 206 and the toothed slide plate 207 are meshed with the central gear 208. The shaft of the central gear 208 and the output shaft of the drive motor 205 are both fitted with a transmission belt 209.

[0032] Thus, by setting baffle 203, the bundle of sparks from the pipe opening can be blocked, preventing them from being sprayed over a long distance, effectively reducing the harmful impact of the bundle of sparks on the processing environment. Furthermore, through the cooperation of baffle 203, baffle 204 and the alternating mechanism, baffle 203 and baffle 204 can be used continuously and alternately to intercept sparks, improving the performance and service life of baffle 203 and baffle 204, providing them with cooling time and space, and facilitating timely unloading when the pipe processing is completed.

[0033] Specifically, baffle 1 203 is connected to the bottom of toothed slide 1 206, and baffle 2 204 is connected to the bottom of toothed slide 2 207. Both toothed slide 1 206 and toothed slide 2 207 are provided with sliding guide rails 301, and sliding handles 302 are slidably installed in the sliding guide rails 301.

[0034] A travel shaft 303 is rotatably mounted on the bottom of the sliding handle 302, and a sliding groove 304 is provided on the clamping plate 201 to guide the movement of the travel shaft 303. Specifically, the travel shaft 303 can slide left and right through the sliding engagement of the sliding guide rail 301 and the sliding handle 302, and a compression spring (not shown) is installed in the sliding guide rail 301 for resetting the sliding handle 302.

[0035] The sliding groove 304 is configured as a Y-shaped sliding groove. The sliding groove 304 includes a working straight groove 3041 and a bifurcation groove 3042. The working straight groove 3041 is connected to the center of the bifurcation groove 3042. When the traveling shaft 303 is located at the bifurcation end of the bifurcation groove 3042, it is far away from the pipe opening. When the traveling shaft 303 is located in the working straight groove 3041, it is close to the pipe opening.

[0036] Thus, the fixing bolt 202 passes through the circular hole at the end of the clamping plate 201, forming a threaded locking connection with the threaded hole on the surface of the workpiece platform 104, so that the clamping plate 201 is stably positioned and clamps the end of the pipe. During laser cutting, the first baffle 203 is initially located at the end of the working straight groove 3041 to form a pipe opening shield, intercepting the bundle of sparks. During the laser cutting repositioning interval, the drive motor 205 drives the central gear 208 to rotate through the transmission belt 209. Through gear meshing, the toothed slide plate 206 and the second toothed slide plate 207 slide in opposite directions, driving the travel shaft 303 to move along the Y-shaped sliding groove 304. At this time, the first baffle 203 slides into the bifurcation groove 3042 to retract, and the second baffle 204 simultaneously slides into the working straight groove 3041 to the end to form a new shielding surface. In the next cutting interval, the drive motor 205 rotates in the opposite direction, realizing the cyclical alternation of the first baffle 203 and the second baffle 204.

[0037] In addition, a torsion spring 305 is fitted on the top of the travel shaft 303. One end of the torsion spring 305 is engaged with the travel shaft 303, and the other end of the torsion spring 305 is engaged with the sliding handle 302. A cooling gear 306 is coaxially fixed on the travel shaft 303, and a steering rack 307 is symmetrically mounted on the bottom of the clamping plate 201. The cooling gear 306 and the steering rack 307 are intermittently meshed.

[0038] Furthermore, during laser cutting, the molten metal undergoes severe oxidation at high temperatures (above 2000°C) under the influence of auxiliary gases (such as oxygen), forming a dense metal oxide layer. This layer, along with the base metal, forms a eutectic phase or intermetallic compound during cooling, remaining on the surfaces of baffle 203 and baffle 204. This affects their service life, and the increased thermal resistance due to slag densification hinders heat dissipation, thus affecting the normal unloading of the workpiece upon completion of cutting. Therefore, please refer to... Figure 7 A nutation striking mechanism is provided on the travel shaft 303 to handle the residual spark residue on the first baffle 203 and the second baffle 204. The nutation striking mechanism includes a nutation wheel 401 fixedly installed on the travel shaft 303 and a reciprocating slide cylinder 402 slidably sleeved on the outside of the nutation wheel 401. Two locking blocks 403 are fixedly installed on the inner wall of the reciprocating slide cylinder 402. The nutation wheel 401 is slidably engaged with the two locking blocks 403. Specifically, the nutation wheel 401 is a circular wheel that swings in a conical manner around the travel shaft 303 at an inclined angle. The edge surface of the nutation wheel 401 slides in contact with the inner wall of the two locking blocks 403, and the conical swing of the nutation wheel 401 drives the two locking blocks 403 and the reciprocating slide cylinder 402 to move up and down periodically along the axial direction.

[0039] Both baffle 1 203 and baffle 2 204 are rotatably mounted on their back sides. Both baffle 1 203 and baffle 2 204 are fixedly mounted with brackets 405 in the middle. The other ends of the two brackets 405 are respectively hinged to baffle 1 203 and baffle 2 204 for the rotation of baffle 1 203 and baffle 2 204.

[0040] The top of the striking arm 404 abuts against the bottom of the reciprocating slide 402. A tension spring 406 is engaged in the middle of both striking arms 404. The other ends of the two tension springs 406 are engaged with the back of the baffle 1 203 and the baffle 2 204 respectively.

[0041] With the above technical solution, when the automatic cutting device for machining provided by this solution is in use, the fixing bolt 202 passes through the round hole at the end of the clamping plate 201, the clamping plate 201 presses against the top of the end of the pipe fitting, and the fixing bolt 202 is threadedly locked with the workpiece platform 104, so that the clamping plate 201 is fixed and thus clamps the pipe fitting. During laser cutting, the clamping plate 201 first blocks the pipe opening, intercepting the bundle of sparks. During the laser cutting repositioning interval, the drive motor 205 drives the central gear 208 to rotate, causing the toothed slide plate 1 206 and toothed slide plate 207 to move, so that the traveling shaft 303 slides in the sliding groove 304. The baffle 1 203, which was originally located in the working position, moves to the bifurcation groove 3042, thus moving away from the pipe opening. The baffle 2 204, which was originally away from the pipe opening, slides along the bifurcation groove 3042 to the working straight groove 3041 until it reaches the end. At this time, the laser cutting continues, and the baffle 2 204 blocks the jet of sparks. The baffle 1 203 cools down and rests. During the next laser cutting interval, the drive motor 205 flips, causing the baffle 1 203 and the baffle 2 204 to alternate again, repeating the cycle.

[0042] During the alternation of baffle 1 203 and baffle 2 204, the cooling gear 306 meshes with the steering rack 307. Since the steering rack 307 is symmetrically arranged and the movement directions of the two travel shafts 303 are also opposite, the two travel shafts 303 rotate in the same direction, so that baffle 1 203 and baffle 2 204 always remain parallel. When they meet, they both rotate from the horizontal to the vertical, thus avoiding collision. When the cooling gear 306 disengages from the steering rack 307, it is reset by the elastic potential energy of the torsion spring 305.

[0043] Furthermore, when baffle 1 203 and baffle 2 204 rotate, the nutating wheel 401 rotates synchronously with the traveling shaft 303 through the cooperation of the nutating wheel 401 and the reciprocating slide 402. Utilizing its shape characteristics, the reciprocating slide 402, which is slidably engaged with it, moves up and down. When the reciprocating slide 402 moves down, the top of the striking arm 404 is squeezed, causing its other end to lift up. When the reciprocating slide 402 moves up, the striking arm 404 is reset by the tension of the tension spring 406. At this time, the striking end of the striking arm 404 impacts the back of baffle 1 203 and baffle 2 204. The resulting impact causes the residual spark slag on baffle 1 203 and baffle 2 204 to fall off, thereby interrupting the recrystallization and densification process of the molten slag. Combined with the rotational action at this time, the residual spark slag can be thrown off, achieving self-cleaning of baffle 1 203 and baffle 2 204 and further improving their service life.

Claims

1. An automatic cutting device for machining, comprising a robotic arm (101), a laser cutter (102) disposed at the moving end of the robotic arm (101), a positioner (103) disposed on the side of the robotic arm (101), and a workpiece platform (104) detachably mounted at the moving end of the positioner (103), characterized in that, A clamping mechanism for clamping pipe fittings is movably installed on the workpiece platform (104). The clamping mechanism includes a clamping plate (201) and a fixing bolt (202). A baffle (203) for blocking the bundle of sparks at the pipe fitting opening is slidably provided on the clamping plate (201).

2. The automatic cutting device for machining according to claim 1, characterized in that: The clamping plate (201) has two round holes at its end. The fixing bolt (202) passes through the round holes. The fixing bolt (202) is a bolt with a threaded section at the bottom. The workpiece platform (104) has a threaded hole on its surface. The fixing bolt (202) is threadedly connected to the workpiece platform (104).

3. The automatic cutting device for machining according to claim 1, characterized in that: A second baffle (204) is slidably provided on the clamping plate (201). An alternation mechanism is also provided on the clamping plate (201) for alternating use of the first baffle (203) and the second baffle (204). The alternation mechanism includes a drive motor (205) fixedly installed on the upper surface of the clamping plate (201). A toothed slide plate (206) and a toothed slide plate (207) are slidably installed on both sides of the clamping plate (201). A central gear (208) is rotatably installed in the middle of the clamping plate (201). The toothed slide plate (206) and the toothed slide plate (207) are meshed with the central gear (208). The shaft of the central gear (208) and the output shaft of the drive motor (205) are fitted with a transmission belt (209).

4. The automatic cutting device for machining according to claim 3, characterized in that: The first baffle (203) is connected to the bottom of the first toothed slide plate (206); the second baffle (204) is connected to the bottom of the second toothed slide plate (207).

5. An automatic cutting device for machining according to claim 3, characterized in that: Both the toothed slide plate one (206) and the toothed slide plate two (207) are provided with sliding guide rails (301) at the bottom. A sliding handle (302) is slidably installed in the sliding guide rail (301). A traveling shaft (303) is rotatably installed at the bottom of the sliding handle (302). A sliding groove (304) for guiding the movement of the traveling shaft (303) is provided on the clamping plate (201).

6. An automatic cutting device for machining according to claim 5, characterized in that: The sliding groove (304) is configured as a Y-shaped sliding groove. The sliding groove (304) includes a working straight groove (3041) and a bifurcation groove (3042). The working straight groove (3041) is connected to the center of the bifurcation groove (3042). When the traveling shaft (303) is located at the bifurcation end of the bifurcation groove (3042), it is far away from the pipe opening. When the traveling shaft (303) is located in the working straight groove (3041), it is close to the pipe opening.

7. An automatic cutting device for machining according to claim 5, characterized in that: A torsion spring (305) is fitted on the top of the travel shaft (303). One end of the torsion spring (305) is engaged with the travel shaft (303), and the other end of the torsion spring (305) is engaged with the sliding handle (302).

8. An automatic cutting device for machining according to claim 5, characterized in that: A cooling gear (306) is coaxially fixed on the travel shaft (303), and a steering rack (307) is symmetrically installed on the bottom of the clamping plate (201). The cooling gear (306) and the steering rack (307) mesh intermittently.

9. An automatic cutting device for machining according to claim 5, characterized in that: The traveling shaft (303) is provided with a nutation striking mechanism for treating the residual spark residue on the first baffle (203) and the second baffle (204). The nutation striking mechanism includes a nutation wheel (401) fixedly installed on the traveling shaft (303) and a reciprocating slide cylinder (402) slidably sleeved on the outside of the nutation wheel (401). Two locking blocks (403) are fixedly installed on the inner wall of the reciprocating slide cylinder (402). The nutation wheel (401) is slidably engaged with the two locking blocks (403). A striking arm (404) is rotatably installed on the back side of the first baffle (203) and the second baffle (204). A bracket (405) is fixedly installed in the middle of the two striking arms (404). The other end of the two brackets (405) is hinged to the first baffle (203) and the second baffle (204) respectively.

10. An automatic cutting device for machining according to claim 9, characterized in that: The top of the striking arm (404) abuts against the bottom of the reciprocating slide (402), and a tension spring (406) is engaged in the middle of both striking arms (404). The other ends of the two tension springs (406) are engaged with the back of the first baffle (203) and the second baffle (204) respectively.

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