Arcuate support plasma cutting positioning and correcting device for coal mine

Abstract

The utility model relates to metal material straightening technical field, specifically is a kind of arch support plasma cutting positioning correction device for coal mine, including feeding conveying roller way and cutting equipment, two deforming correction devices are a group, about cutting equipment symmetrically set;Each deforming correction device includes the inner collet seat fixed on feeding conveying roller way, and protruding piece is equipped on inner collet seat;Support stand, driving cylinder is installed on support stand, driving cylinder output end is set downward, and output end is connected with outer collet seat, and recess is equipped on outer collet seat;Outer collet seat is oppositely arranged with inner collet seat, and constitutes arch support clamping correction mechanism;The utility model is closely matched arch support profile through inner collet seat and outer collet seat, high-precision synchronous correction is realized, effectively solve the cutting positioning deviation problem caused by plastic deformation of arch support, avoid broken arc or nozzle collision risk, replace traditional manual prying by mechanical clamping, significantly reduce labour intensity, improve production line continuity and cutting efficiency.

Description

Technical Field

[0001] This utility model relates to the field of metal material straightening technology, specifically a plasma cutting positioning and straightening device for an arched support in coal mines. Background Technology

[0002] Arch supports, as key load-bearing components in coal mine roadway support systems, are manufactured from high-strength steel using a cold-pressing process, resulting in excellent mechanical properties and structural stability. In existing production processes, the formed arch supports are transported to the cutting station via a roller conveyor, where a plasma cutting robot performs fixed-length cutting to meet the dimensional adaptation requirements of different roadway conditions.

[0003] This cutting process places strict requirements on the positioning accuracy between the workpiece and the cutting robot, requiring the arc initiation distance to be precisely controlled within the 3-5mm range. Excessive spacing leads to dispersed arc energy, reduced cutting capacity, and deteriorated cut quality; insufficient spacing easily causes the nozzle to collide with the workpiece, damaging the cutting head and causing frequent arc interruptions. However, in actual production, it has been found that the arched supports generally exhibit varying degrees of plastic deformation and dimensional deviations after undergoing pressing, logistics transportation, and warehousing. These deformations often exceed the allowable tolerances of the plasma cutting equipment, resulting in frequent arc interruptions or arc initiation failures during the cutting process.

[0004] Currently, the production site mainly relies on manual intervention for correction, which usually requires two operators to work together to use tools such as crowbars to forcibly adjust the position of the steel profiles through mechanical means such as applying pressure and prying. This traditional method is not only labor-intensive and inefficient, but also seriously restricts the continuous operation efficiency of the production line, becoming a process bottleneck that restricts capacity improvement.

[0005] To address the aforementioned technical challenges, there is an urgent need to develop an auxiliary mechanism with deformation correction capabilities to achieve efficient correction during the arch support cutting process and ensure stable operation of the production line. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a plasma cutting positioning and correction device for arched supports in coal mines with deformation correction function.

[0007] The technical solution adopted by this utility model to solve its technical problem is:

[0008] A plasma cutting positioning and correction device for an arched support in a coal mine includes a feeding conveyor roller and a cutting device. Two deformation correction devices are arranged symmetrically about the cutting device. Each deformation correction device includes an inner clamp fixed on the feeding conveyor roller, with a protrusion on the inner clamp that mates with the inner contour of the arched support to be cut. A support frame is also included, on which a drive cylinder is mounted. The output end of the drive cylinder is downward and connected to an outer clamp, which has a groove that mates with the outer contour of the arched support to be cut. The outer clamp and the inner clamp are arranged opposite to each other, forming an arched support clamping and correction mechanism.

[0009] Compared with the prior art, the outstanding features of this utility model, which adopts the above technical solution, are:

[0010] This invention utilizes a bidirectional clamping mechanism formed by symmetrically arranged inner and outer clamping seats. By tightly fitting the protrusions of the inner clamping seat and the grooves of the outer clamping seat with the arched bracket contour, high-precision synchronous correction is achieved, effectively solving the problem of cutting positioning deviation caused by plastic deformation of the arched bracket. After correction by the correction device, the arc starting distance of the cutting equipment is stably controlled within the process range of 3-5mm, avoiding the risk of arc breakage or nozzle collision. By replacing traditional manual prying with mechanical clamping, labor intensity is significantly reduced, and production line continuity and cutting efficiency are improved.

[0011] As a preferred embodiment, a further technical solution of this utility model is:

[0012] Preferably, it also includes a number of guide components arranged equidistantly along the longitudinal direction of the feeding conveyor roller. Each set of guide components includes a pair of roller supports symmetrically arranged on both sides of the center line of the roller, and guide rollers rotatably mounted on each roller support via bearings. The working surface of the guide roller rim maintains tangential contact with the outer wall of the arched support. The roller continuously contacts the outer wall of the arched support to correct lateral deviation in real time during the conveying process. Rolling contact, compared with sliding friction, avoids scratching the surface of the arched support.

[0013] Preferably, the guide assembly also includes a pair of limiting posts symmetrically arranged on both sides of the center line of the roller conveyor. The distance between the two limiting posts is D1, the width of the arch support to be cut is W1, and the relationship between D1 and W1 is W1+10cm≤D1≤W1+20cm. A gap of 10-20cm is reserved to limit the large displacement of the arch support while allowing slight deformation to pass through (to avoid jamming).

[0014] Preferably, the outer card holder includes a pulley bracket and an outer card plate mounted on the pulley bracket, the support frame is provided with a sliding groove, the pulley bracket is equipped with a pulley, and the pulley is slidably connected in the sliding groove.

[0015] Preferably, the outer clamping plate and the pulley bracket, and the inner clamping seat and the support frame of the feeding conveyor roller are all bolted together; this facilitates the replacement of worn outer clamping plates and inner clamping seats, and facilitates the replacement of different models of outer clamping plates and inner clamping seats, adapting to arched supports of different sizes.

[0016] Preferably, a limit switch is installed on the feeding conveyor roller, the limit switch is connected to the main controller, and the main controller is connected to the drive cylinder and the drive motor of the feeding conveyor roller; after the limit switch is triggered, the roller automatically stops and starts correction, which can reduce manual intervention and realize fixed length cutting. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the deformation correction device in use according to an embodiment of this utility model;

[0018] Figure 2 This is a schematic diagram of the installation structure of the deformation correction device in an embodiment of this utility model;

[0019] Figure 3 This is a schematic diagram of the supporting frame structure in an embodiment of this utility model;

[0020] Figure 4 This is a schematic diagram of the inner card holder in an embodiment of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Feeding conveyor roller; 2. Cutting equipment; 3. Arched bracket; 4. Inner seat; 5. Support frame; 501. Slide groove; 6. Drive cylinder; 7. Outer seat; 701. Pulley bracket; 702. Outer clamping plate; 8. Roller bracket; 9. Guide roller; 10. Limiting post; 11. Connecting plate. Detailed Implementation

[0022] The present invention will be further described below with reference to specific embodiments. The purpose of this description is only to better understand the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0023] like Figure 1 , Figure 2 , Figure 4As shown, this embodiment provides a plasma cutting positioning and correction device for an arched support in a coal mine, including a feeding conveyor roller 1 and a cutting device 2. Two deformation correction devices are arranged symmetrically about the cutting device 2. Each deformation correction device includes an inner clamping seat 4 fixed to the feeding conveyor roller 1, with a protrusion on the inner clamping seat 4 that mates with the inner contour of the arched support 3 to be cut. A support frame 5 is supported, and a drive cylinder 6 is mounted on the support frame 5. The output end of the drive cylinder 6 is downward-facing and connected to an outer clamping seat 7, which has a groove that mates with the outer contour of the arched support 3 to be cut. The outer clamping seat 7 and the inner clamping seat 4 are arranged opposite to each other, forming a clamping and correction mechanism for the arched support 3. The feeding conveyor roller 1 is a roller conveyor in the prior art, and the cutting device 2 is a plasma cutting machine or a plasma cutting robot in the prior art.

[0024] Based on the previous embodiment, the deformation correction device further includes several guide components equidistantly arranged along the longitudinal direction of the feeding conveyor roller 1. Each guide component includes a pair of roller supports 8 symmetrically arranged on both sides of the center line of the roller 1, and guide rollers 9 rotatably mounted on each roller support 8 via bearings. The working surface of the guide roller 9 maintains tangential contact with the outer wall of the arched support 3. The rollers continuously contact the outer wall of the arched support 3 to correct lateral deviations during the conveying process in real time. The guide rollers 9 are made of nylon.

[0025] Furthermore, the guide assembly also includes a pair of limiting posts 10 symmetrically arranged on both sides of the center line of the roller conveyor. The distance between the two limiting posts 10 is D1, and the width of the arch support 3 to be cut is W1. The relationship between D1 and W1 is W1+10cm≤D1≤W1+20cm. A gap of 10-20cm is reserved to limit the large displacement of the arch support 3 while allowing slight deformation to pass through (to avoid jamming).

[0026] In this embodiment, as Figure 3 The outer clamping base 7 includes a pulley bracket 701 and an outer clamping plate 702 mounted on the pulley bracket 701. A sliding groove 501 is provided on the support frame 5, and a pulley is mounted on the pulley bracket 701, the pulley being slidably connected in the sliding groove 501. The outer clamping plate 702 is bolted to the pulley bracket 701; Figure 4 The inner card seat 4 has connecting plates 11 on both sides, and the connecting plates 11 are bolted to the support frame of the feeding conveyor roller 1. This allows the staff to easily replace the inner card seat 4 and outer card plate 702 with suitable ones according to the size of the arched bracket 3.

[0027] Preferably, a limit switch is installed on the feeding conveyor roller 1. The limit switch is connected to the main controller, which is connected to the drive cylinder 6 and the drive motor of the feeding conveyor roller 1. The main controller is also connected to the cutting equipment 2. After the limit switch is triggered, the roller automatically stops and starts correction, which can reduce manual intervention and achieve fixed-length cutting. In this embodiment, the limit switch is an Omler E3Z-D61 photoelectric proximity switch, and the main controller is a PLC main controller (such as Siemens S7-1200).

[0028] In operation, the arched support 3 to be cut is placed on the feeding conveyor roller 1. The feeding conveyor roller 1 automatically transports the workpiece, and the guide roller 9 corrects lateral deviation in real time. When the arched support 3 triggers the limit switch, the feeding conveyor roller 1 stops, and the drive cylinder 6 pushes the outer clamp 7 downward, which, together with the inner clamp 4, clamps the inner and outer contours of the arched support 3 for 3-5 seconds of mechanical correction. Then, the plasma cutting robot completes the fixed-length cut with a stable arc starting distance (4±1mm). After the cutting operation is completed, the cutting equipment 2 (plasma cutting robot) sends a completion signal to the main controller. The main controller controls the drive cylinder 6 to pull the outer clamp 7 upward, releasing the arched support 3 to be cut, releasing the limit switch, and then controls the feeding conveyor roller 1 to continue running. The signal acquisition, transmission, and control logic used in this embodiment are all based on standard implementation schemes in the field of industrial automation.

[0029] This invention utilizes a bidirectional clamping mechanism consisting of a symmetrically arranged inner clamping seat 4 and an outer clamping seat 7, along with the coordinated control of a guide component and a limit switch, to achieve high-precision automatic correction of the arch support 3, ensuring that the plasma cutting arc initiation distance remains stable within the 4±1mm process range. The PLC-controlled automated correction process completely replaces manual prying operations, significantly improving correction efficiency, reducing arc breakage rate, and significantly reducing labor intensity. The modular design of the clamping seat structure and the application of industrial-grade standard parts enable the device to quickly adapt to arch supports 3 of different specifications, providing an efficient and reliable solution for the mass production of coal mine support components.

[0030] The above description is merely a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All equivalent changes made based on the content of the present utility model specification and its drawings are included within the scope of the present utility model.

Claims

1. A plasma cutting positioning and correction device for an arched support in a coal mine, comprising a feeding conveyor roller (1) and a cutting device (2), characterized in that: Two deformation correction devices are arranged as a group, symmetrically about the cutting equipment (2); Each deformation correction device includes an inner card seat (4) fixed on the feeding conveyor roller (1), and the inner card seat (4) is provided with a protrusion that matches the inner contour of the arch support (3) to be cut; A support frame (5) is provided, and a drive cylinder (6) is installed on the support frame (5). The output end of the drive cylinder (6) is set downward, and the output end is connected to an outer card seat (7). The outer card seat (7) is provided with a groove that matches the outer contour of the arch support (3) to be cut. The outer card holder (7) and the inner card holder (4) are arranged opposite to each other to form an arched bracket (3) clamping and correcting mechanism.

2. The arch support plasma cutting positioning and correcting device for coal mine according to claim 1, characterized in that: It also includes several guide components arranged equidistantly along the longitudinal direction of the feeding conveyor roller (1). Each guide component includes a pair of roller supports (8) symmetrically arranged on both sides of the center line of the roller, and guide rollers (9) rotatably mounted on each roller support (8) via bearings. The working surface of the guide roller (9) is in tangential contact with the outer wall of the arch support (3).

3. The arch support plasma cutting positioning and correcting device for coal mine according to claim 2, characterized in that: The guide assembly also includes a pair of limiting posts (10) symmetrically arranged on both sides of the center line of the roller conveyor. The distance between the two limiting posts (10) is D1, the width of the arch support (3) to be cut is W1, and the relationship between D1 and W1 is W1+10cm≤D1≤W1+20cm.

4. The arch support plasma cutting positioning and correcting device for coal mine according to claim 1, characterized in that: The outer card holder (7) includes a pulley bracket (701) and an outer card plate (702) installed on the pulley bracket (701). The support frame (5) is provided with a sliding groove (501). A pulley is installed on the pulley bracket (701) and the pulley is slidably connected in the sliding groove (501).

5. The arch support plasma cutting positioning and correcting device for coal mine according to claim 4, characterized in that: The outer card plate (702) and the pulley bracket (701), and the inner card seat (4) and the support frame of the feeding conveyor roller (1) are all bolted and fixed.

6. The arch support plasma cutting positioning and correcting device for coal mine according to claim 1, characterized in that: Limit switches are installed on the feeding conveyor roller (1). The limit switches are connected to the main controller. The main controller is connected to the drive cylinder (6) and the drive motor of the feeding conveyor roller (1).

Images