Pre-stress sleeper reinforcing steel bar laser cutting equipment

Abstract

The invention relates to the technical field of railroad sleeper production, and discloses prestressed sleeper steel bar laser cutting equipment which comprises a workbench, a feeding port is formed in the right side of the workbench, a discharging port is formed in the left side of the workbench, a laser cutting machine is arranged in the middle of the workbench, and a cutting head is arranged on the laser cutting machine; a feeding mechanism is arranged on the right portion of the workbench, a steel bar is arranged on the feeding mechanism, two rows of transverse ribs are symmetrically arranged on the steel bar, and two parallel transverse rib gaps are formed between the two rows of transverse ribs; a positioning mechanism is further arranged in the workbench and comprises a sliding groove formed in the workbench, a sliding seat is arranged in the sliding groove in a sliding mode, and a positioning block is arranged on the sliding seat in a sliding mode. According to the laser cutting equipment for the prestressed sleeper reinforcing steel bar, two rows of transverse ribs of the reinforcing steel bar and a gap between the two transverse ribs can be automatically aligned to set positions, then laser cutting is conducted, the cut reinforcing steel bar sections continue to be conveyed to the next station according to the set positions, and therefore manual positioning is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of railway sleeper production, and particularly to a laser cutting device for prestressed sleeper steel bars. Background Art

[0002] The prestressed railway sleeper is a sleeper with the material changed to concrete and prestress applied on the basis of the ordinary sleeper. The research on the production process of prestressed concrete sleepers is not only beneficial to improving the durability of the sleeper structure, but also has a very positive promoting effect on extending the service life of the sleeper.

[0003] The prestressed sleeper steel bar is the compressive stress pre-applied to the component concrete by the pretensioning method or the post-tensioning method before the use of the structural component. In a reinforced concrete structure, cracks will occur when the component is in tension, which does not affect safety, but the appearance is not good. The method of first applying tension to the steel bar, then pouring concrete, and releasing the steel bar after the strength reaches the requirement to make the steel bar retract to offset the tension of the normal service load (pretensioning method). The post-tensioning method is to pour concrete and leave holes, add tensioned steel bars after forming, and then anchor them at both ends of the component with instruments.

[0004] The flow production line method is a traditional production process method for prestressed concrete. In the production process, it is necessary to cut the prestressed sleeper steel bars, and the cut steel bars are then sent to the next production line station. In the prior art, when cutting the steel bars, manual feeding is usually used. When feeding, the steel bars are only placed on the cutting station, and the steel bars are not positioned. There are usually two rows of transverse rib protrusions and the transverse rib gaps in the middle on the surface of the steel bars, while the anchors and connectors connected to the sleeper steel bars should be installed and fixed according to the specified position, direction and shape in the design. Therefore, it is also necessary to re-align the angle of the steel bars in the subsequent production process. Summary of the Invention

[0005] The present invention provides a laser cutting device for prestressed sleeper steel bars, which has the beneficial effects of automatically aligning the two rows of transverse ribs and the two transverse rib gaps of the steel bars to the set positions and then performing laser cutting, and continuously conveying the cut steel bar segments to the next station according to the set positions, thus eliminating the need for manual positioning and improving the production efficiency, and solving the problem mentioned in the above background art that in the prior art, when cutting the steel bars, manual feeding is usually used. When feeding, the steel bars are only placed on the cutting station, and the steel bars are not positioned. There are usually two rows of transverse rib protrusions and the transverse rib gaps in the middle on the surface of the steel bars, while the anchors and connectors connected to the sleeper steel bars should be installed and fixed according to the specified position, direction and shape in the design. Therefore, it is also necessary to re-align the angle of the steel bars in the subsequent production process.

[0006] The present invention provides the following technical solution: A laser cutting device for prestressed sleeper steel bars, comprising a workbench. An inlet is provided on the right side of the workbench, an outlet is provided on the left side of the workbench, a laser cutting machine is arranged in the middle of the workbench, and a cutting head is arranged on the laser cutting machine; A feeding mechanism is arranged on the right part of the workbench, a steel bar is arranged on the feeding mechanism, two rows of transverse ribs are symmetrically arranged on the steel bar, and two parallel transverse rib gaps are formed between the two rows of transverse ribs; A positioning mechanism is further arranged in the workbench. The positioning mechanism includes a chute opened in the workbench, a sliding seat is slidably arranged in the chute, a positioning block is slidably arranged on the sliding seat, and the positioning block fits with the transverse rib gap; The steel bar is spirally pushed towards the middle of the workbench by the feeding mechanism, the positioning block is inserted into the transverse rib gap through the positioning mechanism to complete the positioning of the steel bar, and then the positioning mechanism drives the steel bar to rotate to cooperate with the cutting head to cut the steel bar.

[0007] As an optional scheme of the laser cutting device for prestressed sleeper steel bars of the present invention, wherein: the sliding seat is elastically connected to the inner wall of the workbench through a first spring, a limiting rod is arranged on the positioning block, the limiting rod is slidably connected to the sliding seat, and the limiting rod is elastically connected to the sliding seat through a second spring.

[0008] As an optional scheme of the laser cutting device for prestressed sleeper steel bars of the present invention, wherein: a limiting groove is opened in the workbench, the limiting rod is slidably connected to the limiting groove, the limiting groove includes a first horizontal groove, an inclined groove and a second horizontal groove which are connected in sequence from right to left, and the height of the first horizontal groove is lower than that of the second horizontal groove.

[0009] As an optional scheme of the laser cutting device for prestressed sleeper steel bars of the present invention, wherein: the feeding mechanism includes a screw conveying device arranged on the workbench, the screw conveying device is used to drive the displacement of a push rod, and the push rod is used to push the steel bar to move from right to left.

[0010] As an optional scheme of the laser cutting device for prestressed sleeper steel bars of the present invention, wherein: the screw conveying device includes a mounting seat arranged on the workbench, a slider is slidably arranged on the mounting seat, the push rod is connected to the slider, a first motor is arranged on the mounting seat, a screw rod is rotatably arranged on the mounting seat, an output shaft of the first motor is connected to the screw rod, a nut is arranged on the slider, and the nut is threadedly connected to the screw rod.

[0011] As an alternative solution of a laser cutting device for prestressed sleeper steel bars according to the present invention, wherein: the feeding mechanism further includes a first electric three-jaw chuck and a first rotating assembly, the first electric three-jaw chuck is used for clamping the steel bars, and the first rotating assembly is used for driving the steel bars to rotate.

[0012] As an alternative solution of a laser cutting device for prestressed sleeper steel bars according to the present invention, wherein: the first electric three-jaw chuck is rotatably arranged on the workbench, and three first jaws are circumferentially arranged on the first electric three-jaw chuck. Through the three first jaws, synchronous radial displacement is made based on the central axis of the first electric three-jaw chuck to clamp or loosen the steel bars.

[0013] As an alternative solution of a laser cutting device for prestressed sleeper steel bars according to the present invention, wherein: the first rotating assembly includes a second motor arranged on the workbench, a first gear is arranged on the output shaft of the second motor, a connecting ring is arranged on the first electric three-jaw chuck, and a second gear is arranged on the connecting ring. The second gear meshes with the first gear; The connecting ring is rotatably connected to the first electric three-jaw chuck. An arc-shaped groove is formed on the connecting ring, an arc-shaped block is arranged on the second gear, and the arc-shaped block is slidably connected in the arc-shaped groove. The arc-shaped block is elastically connected to the inner wall of the arc-shaped groove through a third spring.

[0014] As an alternative solution of a laser cutting device for prestressed sleeper steel bars according to the present invention, wherein: the elastic support of the third spring makes the arc-shaped block located on the counterclockwise side of the arc-shaped groove; When positioning the transverse rib gaps on the steel bars, the first rotating assembly is used to drive the steel bars to rotate clockwise; When cutting the steel bars, the first rotating assembly is used to drive the steel bars to rotate counterclockwise.

[0015] As an alternative solution of a laser cutting device for prestressed sleeper steel bars according to the present invention, wherein: a second electric three-jaw chuck and a second rotating assembly are arranged on the left side of the workbench. The second electric three-jaw chuck is rotatably connected to the workbench, and three second jaws are circumferentially arranged on the second electric three-jaw chuck; The second rotating assembly includes a third motor arranged on the workbench, a third gear is arranged on the output shaft of the third motor, a fourth gear is arranged on the second electric three-jaw chuck, and the fourth gear meshes with the third gear.

[0016] The present invention has the following beneficial effects: 1. For the prestressed sleeper steel bar laser cutting equipment, for steel bars with two rows of transverse ribs and a transverse rib gap in the middle, a positioning block that fits the transverse rib gap can be used to position the steel bar. By helically pushing the steel bar against the positioning block, during the pushing process, the steel bar rotates relative to the positioning block until the positioning block aligns with the transverse rib gap and fits, thereby fixing the position of the transverse rib gap. When subsequently automatically installing the anchor and connector on the steel bar through mechanical equipment, the two rows of transverse ribs and the two transverse rib gaps can also be docked, thus eliminating the need for manual docking and improving production efficiency.

[0017] 2. The prestressed sleeper steel bar laser cutting equipment, the rotation assembly used to control the rotation of the steel bar for positioning and cutting has drive modes for both clockwise and counterclockwise driving directions. When positioning, the steel bar is driven to rotate clockwise to align the transverse rib gap and the positioning block. In the clockwise driving mode, a certain buffer is achieved between the rotation assembly and the steel bar through a spring, and after the positioning block and the transverse rib gap fit, negative feedback adjustment can be timely carried out through a sensor to stop the output of the rotation assembly.

[0018] 3. When the prestressed sleeper steel bar laser cutting equipment is cutting, the steel bar is driven to rotate counterclockwise. In the counterclockwise driving mode, the connection between the rotation assembly and the steel bar is rigid and there is no buffer, and it can drive the steel bar to rotate one circle for cutting relatively firmly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the whole of the present invention.

[0020] Figure 2 It is a schematic cross-sectional structural diagram of the whole of the present invention.

[0021] Figure 3 For the present invention Figure 2 It is a schematic diagram of the enlarged partial structure at A in the present invention.

[0022] Figure 4 For the present invention Figure 2 It is a schematic diagram of the enlarged partial structure in the present invention.

[0023] Figure 5 It is a schematic cross-sectional structural diagram of the rotation assembly in the present invention.

[0024] Figure 6 For the present invention Figure 5 It is a schematic diagram of the enlarged partial structure at C in the present invention.

[0025] Figure 7 It is an exploded structural diagram of the rotation assembly in the present invention.

[0026] Figure 8 It is an exploded structural diagram of the positioning mechanism in the present invention.

[0027] In the figure: 100, workbench; 110, feeding port; 120, discharging port; 130, laser cutting machine; 140, cutting head; 200, loading mechanism; 210, screw conveyor device; 211, mounting seat; 212, slider; 213, first motor; 214, screw rod; 215, nut; 220, push rod; 230, first electric three-jaw chuck; 231, first jaw; 240, first rotating assembly; 241, second motor; 242, first gear; 243, connecting ring; 244, second gear; 245, arc groove; 246, arc block; 247, third spring; 250, second electric three-jaw chuck; 251, second jaw; 260, second rotating assembly; 261, third motor; 262, third gear; 263, fourth gear; 300, steel bar; 310, transverse rib; 320, transverse rib gap; 400, positioning mechanism; 410, chute; 420, sliding seat; 430, positioning block; 440, first spring; 450, limiting rod; 460, second spring; 470, limiting groove; 471, first horizontal groove; 472, inclined groove; 473, second horizontal groove. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Embodiment 1. Please refer to Figures 1-8 , a laser cutting device for prestressed sleeper steel bars, including a workbench 100. A feeding port 110 is opened on the right side of the workbench 100, a discharging port 120 is opened on the left side of the workbench 100, a laser cutting machine 130 is arranged in the middle of the workbench 100, and a cutting head 140 is arranged on the laser cutting machine 130.

[0030] A loading mechanism 200 is arranged on the right part of the workbench 100. A steel bar 300 is arranged on the loading mechanism 200. Two rows of transverse ribs 310 are symmetrically arranged on the steel bar 300, and two parallel transverse rib gaps 320 are formed between the two rows of transverse ribs 310.

[0031] A positioning mechanism 400 is further arranged in the workbench 100. The positioning mechanism 400 includes a chute 410 opened in the workbench 100. A sliding seat 420 is slidably arranged in the chute 410. A positioning block 430 is slidably arranged on the sliding seat 420, and the positioning block 430 fits with the transverse rib gap 320.

[0032] The steel bar 300 is spirally pushed towards the middle of the workbench 100 by the feeding mechanism 200. The positioning block 430 is fitted into the transverse rib gap 320 through the positioning mechanism 400 to complete the positioning of the steel bar 300. Then, the positioning mechanism 400 drives the steel bar 300 to rotate to cooperate with the cutting head 140 to cut the steel bar 300.

[0033] In this embodiment: The surface of the steel bar 300 has two rows of transverse ribs 310 distributed in the left-right direction and symmetrically arranged. Two parallel and symmetrically arranged transverse rib gaps 320 are formed between the two rows of transverse ribs 310. When cutting the steel bar 300 and when continuing to convey the steel bar 300 cut into two or more segments to the next process after cutting, the positioning of the steel bar 300 is completed through the positioning mechanism 400, so that the two rows of transverse ribs 310 of the steel bar 300 are respectively located at the front side and the rear side, and the two transverse rib gaps 320 are respectively located at the upper side and the lower side.

[0034] A circular hole penetrating from left to right is opened on the workbench 100. The right side is the feeding port 110, and the left side is the discharging port 120. The circular hole is adapted to the steel bar 300. There is a hollowed-out groove in the middle end of the workbench 100. The cutting head 140 in the groove will focus the laser emitted by the laser cutting machine 130 into a laser beam with a high power density through the optical path system and align it with the vertical central axis of the steel bar 300 for cutting. For convenient cutting, the steel bar 300 is also rotated one full circle during cutting.

[0035] The steel bar 300 can be placed into the feeding port 110 by manual feeding, and then the steel bar 300 is pushed to the left by the feeding mechanism 200. During the pushing process, the positioning mechanism 400 positions the steel bar 300 so that the two transverse rib gaps 320 on the steel bar 300 are aligned with the upper and lower sides.

[0036] Embodiment 2. This embodiment is an improved description based on Embodiment 1. Specifically, please refer to Figures 1-8 , the sliding seat 420 is elastically connected to the inner wall of the workbench 100 through the first spring 440. A limiting rod 450 is arranged on the positioning block 430. The limiting rod 450 is slidably connected to the sliding seat 420. The limiting rod 450 is elastically connected to the sliding seat 420 through the second spring 460.

[0037] A limiting groove 470 is opened in the workbench 100. The limiting rod 450 is slidably connected to the limiting groove 470. The limiting groove 470 includes a first horizontal groove 471, an inclined groove 472, and a second horizontal groove 473 that are sequentially connected from right to left. The height of the first horizontal groove 471 is lower than that of the second horizontal groove 473.

[0038] In this embodiment: As shown in the figure, the positioning block 430 is arranged on the upper side. If one of the transverse rib gaps 320 is also exactly on the upper side, the steel bar 300 is first moved to the left without rotation. At this time, the transverse rib gap 320 and the positioning block 430 are exactly engaged. Since the limiting rod 450 is in the first horizontal groove 471 at this time, the limiting rod 450 and the positioning block 430 cannot rise. At this time, the steel bar 300 will drive the positioning block 430 and the sliding seat 420 to move to the left together. If the steel bar 300 is driven to rotate around its left-right direction central axis at this time, the steel bar 300 cannot rotate because the positioning block 430 and the transverse rib gap 320 are stuck.

[0039] Without driving the steel bar 300 to rotate, the steel bar 300, the positioning block 430 and the sliding seat 420 are pushed to the left together. The limiting rod 450 enters the second horizontal groove 473 through the inclined groove 472. When the sliding seat 420 reaches the leftmost side of the sliding groove 410, the limiting rod 450 is not limited and can rise at this time, while the sliding seat 420 is restricted from moving further to the left. At this time, when the steel bar 300 continues to move left, it will push the positioning block 430 and the limiting rod 450 upward. Until the cutting is completed, the positioning block 430 is separated from the contact with the steel bar 300. At this time, the whole sliding seat 420 will be pulled back to the rightmost side of the sliding groove 410 by the resilience of the first spring 440. And the steel bar 300 maintains the state where the two transverse rib gaps 320 are respectively located on the upper and lower sides. At the same time, the limiting rod 450 also moves along the second horizontal groove 473, the inclined groove 472 and the first horizontal groove 471 for resetting.

[0040] If the transverse rib gap 320 on the steel bar 300 is not vertically upward at the beginning, when the steel bar 300 contacts the right inclined surface of the positioning block 430, it will also drive the positioning block 430 and the sliding seat 420 to move left. At this time, the steel bar 300 is controlled to rotate clockwise while moving left, that is, spiral left movement. Then when the steel bar 300 rotates to a certain angle, the positioning block 430 will exactly align with the transverse rib gap 320, and the positioning block 430 will also be engaged into the transverse rib gap 320.

[0041] Embodiment 3. This embodiment is an improvement and explanation based on Embodiment 2. Specifically, please refer to Figures 1-4 , the feeding mechanism 200 includes a lead screw conveying device 210 arranged on the workbench 100. The lead screw conveying device 210 is used to drive the displacement of the push rod 220, and the steel bar 300 is pushed to move from right to left through the push rod 220.

[0042] The lead screw conveying device 210 includes a mounting seat 211 disposed on the workbench 100. A slider 212 is slidably disposed on the mounting seat 211. A push rod 220 is connected to the slider 212. A first motor 213 is disposed on the mounting seat 211. A lead screw 214 is rotatably disposed on the mounting seat 211. The output shaft of the first motor 213 is connected to the lead screw 214. A nut 215 is disposed on the slider 212, and the nut 215 is threadedly connected to the lead screw 214.

[0043] In this embodiment: The operation of the first motor 213 drives the rotation of the lead screw 214, causing the nut 215 and the slider 212 to move leftward under the limitation of the mounting seat 211.

[0044] Embodiment 4 is an improved description based on Embodiment 3. Specifically, please refer to Figures 2-7 , The feeding mechanism 200 further includes a first electric three-jaw chuck 230 and a first rotating assembly 240. The first electric three-jaw chuck 230 is used to clamp the steel bar 300, and the first rotating assembly 240 is used to drive the steel bar 300 to rotate.

[0045] The first electric three-jaw chuck 230 is rotatably disposed on the workbench 100. Three first jaws 231 are circumferentially disposed on the first electric three-jaw chuck 230. The three first jaws 231 make synchronous radial displacements based on the central axis of the first electric three-jaw chuck 230 to clamp or release the steel bar 300.

[0046] The first rotating assembly 240 includes a second motor 241 disposed on the workbench 100. A first gear 242 is disposed on the output shaft of the second motor 241. A connecting ring 243 is disposed on the first electric three-jaw chuck 230. A second gear 244 is disposed on the connecting ring 243, and the second gear 244 meshes with the first gear 242.

[0047] A second electric three-jaw chuck 250 and a second rotating assembly 260 are disposed on the left side of the workbench 100. The second electric three-jaw chuck 250 is rotatably connected to the workbench 100. Three second jaws 251 are circumferentially disposed on the second electric three-jaw chuck 250.

[0048] The second rotating assembly 260 includes a third motor 261 disposed on the workbench 100. A third gear 262 is disposed on the output shaft of the third motor 261. A fourth gear 263 is disposed on the second electric three-jaw chuck 250, and the fourth gear 263 meshes with the third gear 262.

[0049] In this embodiment: The slider 212 drives the push rod 220 to move leftward. After the push rod 220 contacts the right end of the steel bar 300, the steel bar 300 is pushed leftward. The first electric three-jaw chuck 230 is controlled to operate to clamp the steel bar 300. The middle of the first electric three-jaw chuck 230 is hollowed out. The first electric three-jaw chuck 230 can also be an automatic three-jaw chuck such as pneumatic or hydraulic. As a conventional technical means, its specific structure and working principle will not be elaborated.

[0050] When the three first jaws 231 of the first electric three-jaw chuck 230 clamp the right end of the steel bar 300, at the left end of the steel bar 300, the left end of the steel bar 300 is also clamped by the three third motors 261 of the second rotating assembly 260.

[0051] Embodiment Five. This embodiment is an improved description based on Embodiment Four. Specifically, please refer to Figures 2-7 , The connecting ring 243 is rotatably connected to the first electric three-jaw chuck 230. An arc-shaped groove 245 is formed on the connecting ring 243. An arc-shaped block 246 is provided on the second gear 244. The arc-shaped block 246 is slidably connected in the arc-shaped groove 245. The arc-shaped block 246 is elastically connected to the inner wall of the arc-shaped groove 245 through a third spring 247.

[0052] The elastic support of the third spring 247 makes the arc-shaped block 246 located on the counterclockwise side of the arc-shaped groove 245.

[0053] When positioning the transverse rib gap 320 on the steel bar 300, the first rotating assembly 240 drives the steel bar 300 to rotate clockwise.

[0054] When cutting the steel bar 300, the first rotating assembly 240 drives the steel bar 300 to rotate counterclockwise.

[0055] In this embodiment: Since the transverse rib gap 320 may be at various positions on the circumference when the steel bar 300 contacts the positioning block 430, it is necessary to drive the steel bar 300 to rotate different angles according to different situations.

[0056] Specifically, after the first electric three-jaw chuck 230 clamps the steel bar 300, first, the second motor 241 does not operate, so that the positions of the first gear 242 and the second gear 244 are fixed. At this time, the position of the steel bar 300 is also fixed. Until the steel bar 300 moves leftward to contact the positioning block 430, the second motor 241 controls the first gear 242 to rotate counterclockwise, so that the second gear 244 and the arc-shaped block 246 rotate clockwise.

[0057] The arc-shaped block 246 is initially located on the counterclockwise side within the arc-shaped groove 245. At this time, when the arc-shaped block 246 rotates clockwise along the arc-shaped groove 245, it will compress the third spring 247 and simultaneously drive the connecting ring 243 and the first electric three-jaw chuck 230 to rotate clockwise.

[0058] If the horizontal rib gap 320 is initially in the vertically upward position, the positioning block 430 will be engaged into the horizontal rib gap 320 at the beginning. At this time, the connecting ring 243 and the first electric three-jaw chuck 230 cannot rotate clockwise, and the third spring 247 will be further compressed to play a buffering role. A force sensor can be installed in the arc-shaped groove 245, or a negative feedback adjustment device can be installed at the second motor 241 end to determine whether the first electric three-jaw chuck 230 can rotate. If the first electric three-jaw chuck 230 cannot rotate, the second motor 241 can be controlled to stop running in a timely manner.

[0059] If the horizontal rib gap 320 is not initially in the vertically upward position, after the steel bar 300 rotates a certain angle, the positioning block 430 will be engaged into the horizontal rib gap 320. At this time, similarly, the first electric three-jaw chuck 230 cannot continue to rotate clockwise, the third spring 247 is further compressed, and then the second motor 241 is controlled to stop running.

[0060] When cutting the steel bar 300, the second motor 241 is controlled to drive the first gear 242 to rotate clockwise, driving the second gear 244 to rotate counterclockwise. Since the arc-shaped block 246 is in contact with the inner wall of the arc-shaped groove 245 in the counterclockwise direction, the third spring 247 will not be compressed at this time, and the arc-shaped block 246 will immediately drive the connecting ring 243 and the first electric three-jaw chuck 230 to rotate counterclockwise, thereby driving the steel bar 300 to rotate counterclockwise.

[0061] At the same time, the third motor 261 also synchronously drives the third gear 262 to rotate clockwise, thereby driving the fourth gear 263 and the second electric three-jaw chuck 250 to rotate counterclockwise.

[0062] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0063] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A laser cutting device for prestressed sleeper steel bars, comprising a workbench (100), characterized in that: On the right side of the workbench (100), a feeding port (110) is provided. On the left side of the workbench (100), a discharging port (120) is provided. In the middle of the workbench (100), a laser cutting machine (130) is arranged, and a cutting head (140) is arranged on the laser cutting machine (130). On the right part of the workbench (100), a feeding mechanism (200) is arranged. On the feeding mechanism (200), a steel bar (300) is arranged. On the steel bar (300), two rows of transverse ribs (310) are symmetrically arranged. Between the two rows of the transverse ribs (310), two parallel transverse rib gaps (320) are formed. A positioning mechanism (400) is further arranged in the workbench (100). The positioning mechanism (400) includes a sliding groove (410) opened in the workbench (100). In the sliding groove (410), a sliding seat (420) is slidably arranged. On the sliding seat (420), a positioning block (430) is slidably arranged, and the positioning block (430) fits with the transverse rib gap (320). The steel bar (300) is spirally pushed towards the middle of the workbench (100) through the feeding mechanism (200). The positioning block (430) is embedded into the transverse rib gap (320) through the positioning mechanism (400) to complete the positioning of the steel bar (300). Then, the steel bar (300) is driven to rotate through the positioning mechanism (400) to cooperate with the cutting head (140) to cut the steel bar (300).

2. The prestressed sleeper steel bar laser cutting device according to claim 1, characterized in that: The sliding seat (420) is elastically connected with the inner wall of the workbench (100) through a first spring (440). A limiting rod (450) is arranged on the positioning block (430). The limiting rod (450) is slidably connected to the sliding seat (420), and the limiting rod (450) is elastically connected with the sliding seat (420) through a second spring (460).

3. A prestressed sleeper steel bar laser cutting device according to claim 2, characterized in that: A limiting groove (470) is opened in the workbench (100). The limiting rod (450) is slidably connected to the limiting groove (470). The limiting groove (470) includes a first horizontal groove (471), an inclined groove (472), and a second horizontal groove (473) that are connected in sequence from right to left. The height of the first horizontal groove (471) is lower than that of the second horizontal groove (473).

4. A prestressed sleeper steel bar laser cutting device according to claim 1, characterized in that: The feeding mechanism (200) includes a screw conveying device (210) arranged on the workbench (100). The screw conveying device (210) is used to drive the displacement of a push rod (220). Through the push rod (220), the steel bar (300) is pushed to travel from right to left.

5. A prestressed sleeper steel bar laser cutting device according to claim 4, characterized in that: The screw rod conveying device (210) includes a mounting base (211) disposed on the workbench (100). A slider (212) is slidably disposed on the mounting base (211). The push rod (220) is connected to the slider (212). A first motor (213) is disposed on the mounting base (211). A screw rod (214) is rotatably disposed on the mounting base (211). The output shaft of the first motor (213) is connected to the screw rod (214). A nut (215) is disposed on the slider (212). The nut (215) is threadedly connected to the screw rod (214).

6. The prestressed sleeper steel bar laser cutting equipment according to claim 4, characterized in that: The feeding mechanism (200) further includes a first electric three-jaw chuck (230) and a first rotating assembly (240). The first electric three-jaw chuck (230) is used for clamping the steel bar (300). The first rotating assembly (240) is used for driving the steel bar (300) to rotate.

7. A laser cutting device for prestressed sleeper steel bars according to claim 6, characterized in that: The first electric three-jaw chuck (230) is rotatably disposed on the workbench (100). Three first jaws (231) are circumferentially disposed on the first electric three-jaw chuck (230). The steel bar (300) is clamped or released by the synchronous radial displacement of the three first jaws (231) based on the central axis of the first electric three-jaw chuck (230).

8. A laser cutting device for prestressed sleeper steel bars according to claim 7, characterized in that: The first rotating assembly (240) includes a second motor (241) disposed on the workbench (100). A first gear (242) is disposed on the output shaft of the second motor (241). A connecting ring (243) is disposed on the first electric three-jaw chuck (230). A second gear (244) is disposed on the connecting ring (243). The second gear (244) meshes with the first gear (242). The connecting ring (243) is rotatably connected to the first electric three-jaw chuck (230). An arc-shaped groove (245) is formed on the connecting ring (243). An arc-shaped block (246) is disposed on the second gear (244). The arc-shaped block (246) is slidably connected to the arc-shaped groove (245). The arc-shaped block (246) is elastically connected to the inner wall of the arc-shaped groove (245) by a third spring (247).

9. A prestressed sleeper steel bar laser cutting device according to claim 8, characterized in that: The elastic support of the third spring (247) makes the arc-shaped block (246) located on the counterclockwise side of the arc-shaped groove (245). When positioning the transverse rib gap (320) on the steel bar (300), the steel bar (300) is driven to rotate clockwise by the first rotating assembly (240). When cutting the steel bar (300), the steel bar (300) is driven to rotate counterclockwise by the first rotating assembly (240).

10. A laser cutting device for prestressed sleeper steel bars according to claim 1, characterized in that: A second electric three-jaw chuck (250) and a second rotating assembly (260) are disposed on the left side of the workbench (100). The second electric three-jaw chuck (250) is rotatably connected to the workbench (100). Three second jaws (251) are circumferentially disposed on the second electric three-jaw chuck (250). The second rotating assembly (260) includes a third motor (261) disposed on the workbench (100). A third gear (262) is provided on the output shaft of the third motor (261). A fourth gear (263) is provided on the second electric three-jaw chuck (250). The fourth gear (263) meshes with the third gear (262).

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