Process method for removing groove oxide skin of medium-thickness plate

Abstract

The invention relates to a process method for removing the groove oxide skin of a medium-thickness plate, which can be used for completely removing the oxide skin on a groove cutting surface of the medium-thickness plate. The groove cutting surface of the medium-thickness plate is conveyed into a shot blasting chamber by a mesh belt conveying device; the shot blasting devices located on the periphery of the shot blasting chamber eject steel shots with energy to knock the groove cutting face of the medium-thickness plate located in the shot blasting chamber, and after oxide skin generated on the groove cutting face of the medium-thickness plate is removed, the mesh belt conveying device conveys the groove cutting face of the medium-thickness plate with the oxide skin removed out of the shot blasting chamber. The shot collecting device collects and concentrates shots cast by the shot blasting device at the lower part of the shot blasting chamber into the shot lifting device, the shot lifting device lifts the shots to a certain height, the shots enter the shot dust separation device, and dust impurities except the shots are separated out through separation of the shot dust separation device. And the pellets enter the impeller head through the pellet conveying pipeline for cyclic utilization.

Description

Technical Field

[0001] The invention relates to a process for removing oxide scale from the groove of a medium-thick plate, which can completely remove the oxide scale on the groove cutting surface of the medium-thick plate. Background Art

[0002] At present, the commonly used machine tools for cutting medium and thick plates are plasma cutting machines, flame cutting machines, laser cutting machines, etc. In the cutting process of medium and thick plates, due to the ratio of cutting gas, cutting speed, and plate conditions, cutting often produces slag, burrs, oxide scale, etc., especially the bevel cutting of medium and thick plates, which is very easy to produce oxide scale. The next process after cutting medium and thick plates is generally welding, and the presence of oxide scale will seriously affect the quality of welding. The oxide scale will affect the fusion of the weld, reduce the welding strength, and even cause the weld to crack. Therefore, before welding, the oxide scale on the cut surface of the medium and thick plate must be removed, but due to the various forms of the bevel, the common ones are V-shaped grooves, K-shaped grooves, L-shaped grooves, etc., and the cutting edges are often very random according to the different parts. It is difficult to quickly and efficiently remove the oxide scale on the bevel using traditional mechanical processing methods. The use of equipment such as deburring machines or slag removers can only remove the slag and burrs on the cutting edges, or clean the upper and lower surfaces of the plate. Therefore, the removal of oxide scale on the bevel of medium and thick plates is often done manually. After the cutting machine cuts the material or before welding, workers use angle grinders or shovels to remove the oxide scale on the groove, which is labor-intensive, has low removal efficiency and a poor working environment. Summary of the invention

[0003] Design purpose: To avoid the shortcomings of the background technology, a process method for removing the oxide scale on the groove cutting surface of the medium and thick plate is designed, which can completely remove the oxide scale on the groove cutting surface of the medium and thick plate.

[0004] Design scheme: In order to achieve the above design objectives. The present invention is in terms of system design: 1. The entire mechanism includes a shot blaster, a shot blasting chamber, a mesh belt conveyor, a pellet collecting device, a pellet lifting device, a pellet dust separation device, a pellet conveying pipeline, etc. (the above 7 devices have no specific arrangement order and the above 7 devices are existing devices). 2. In terms of method design: the plate with a groove to be processed is transported into the shot blasting chamber through a mesh belt conveyor. The shot blaster works at a set frequency, ejects steel pellets to knock the groove of the plate, and the impact action causes the cured skin on the groove surface to fall off and peel off the groove surface to complete the removal of the oxide scale on the groove of the medium and thick plate. The ejected pellets are collected at the bottom of the shot blasting chamber, and then sent to the top of the machine after passing through the lifting device. After passing through the pellet dust separation device, clean pellets are separated and distributed to the shot blaster through the pellet conveying pipeline for recycling.

[0005] Technical solution: A process method for removing oxide scale from the groove of medium and thick plates. A mesh belt conveyor conveys the groove cut surface of the medium and thick plates into a shot blasting room. Multiple shot blasting machines located around the shot blasting room eject steel shots with energy to hit the groove cut surface of the medium and thick plates located in the shot blasting room. After removing the oxide scale generated on the groove cut surface of the medium and thick plates, the mesh belt conveyor conveys the groove cut surface of the medium and thick plates after the oxide scale is removed out of the shot blasting room. A shot collecting device collects the shots ejected by the shot blasting machine at the bottom of the shot blasting room and concentrates them in a shot lifting device. The shot lifting device lifts the shots to a certain height and enters the shot dust separation device. After separation by the shot dust separation device, dust impurities other than the shots are separated, and the shots enter the shot blasting machine through a shot conveying pipeline for recycling.

[0006] Compared with the background technology, the present invention can automatically remove a large amount of oxide scale from the groove of medium and thick plate cutting parts through an automatic control system; secondly, it greatly improves the production efficiency of removing oxide scale from the groove, while reducing the labor intensity of workers and improving the working environment of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the process method for removing oxide scale from the groove of medium and thick plates.

[0008] Figure 2 yes Figure 1 Left view of .

[0009] Figure 3 yes Figure 1 Top view of the .

[0010] Figure 4 yes Figure 1 Axonometric view of the .

[0011] Figure 5 It is a schematic diagram of an octahedral shot blasting room. Implementation

[0012] Example 1: Refer to the attached Figure 1-4 A process for removing oxide scale from the groove of a medium and thick plate comprises a shot blasting machine, a shot blasting chamber, a mesh belt conveying device, a shot collecting device, a shot lifting device, a shot dust separation device, a shot conveying pipeline, and the like.

[0013] The shot blasting machine 6 is installed at a certain angle on the shot blasting chamber 7. The mounting flange of the shot blasting machine 6 is at a certain angle to both the horizontal plane and the vertical plane. The design of this angle is to maximize the coverage of the shot blasting chamber particles, and to meet the requirements that the head end face and tail section of the medium and thick plate parts conveyed into the shot blasting chamber are covered by the shot blasting. The shot blasting chamber 7 is generally designed as an octahedral structure, and 1-2 shot blasting machines 6 are installed on each face, so that the interior of the shot blasting chamber is completely filled with the striking range of the steel shot.

[0014] The driving roller 2 of the mesh belt conveyor is installed on the frame 1, and the driving roller drives the mesh belt to convey the medium and thick plate cut parts into the shot blasting chamber 7 to remove the oxide scale on the groove. The shot collecting device 8 collects the shots ejected by the shot blasting machine 6 at the lower part of the shot blasting chamber 7 and concentrates them in the shot lifting device 3. The shot lifting device 3 lifts the shots to a certain height and enters the shot dust separation device 5. After separation by the shot dust separation device 5, dust impurities other than the shots are separated, and the shots enter the shot blasting machine 6 through the shot conveying pipe 9 for recycling.

[0015] The inspection platform 4 is a steel platform and guardrail designed for easy inspection and maintenance.

[0016] Although the grooves of medium and thick plates are of different forms and the cutting edges are random, the oxide scale on the cutting surface is often brittle, and it is easy to break the oxide scale by knocking, thereby peeling it off from the groove cutting surface. Therefore, the present invention proposes a process method for removing the oxide scale on the groove by using steel shot blasting to hit the groove. The steel shot is thrown out by the centrifugal force of the high-speed rotating shot blaster, and the medium and thick plate cutting pieces with grooves are transported to the inside of the shot blasting chamber by mesh belt conveyor. The shot blaster is arranged inside the shot blasting chamber, and the shot ejected by the four groups of shot blasters can cover the entire inside of the shot blasting chamber. Therefore, no matter what the groove form is and the cutting edge is random, there will be shots knocked to the corresponding position to peel off the oxide scale from the groove cutting surface. The knocked shots are recycled back and forth through collection devices, conveying devices, lifting devices, separation devices and other mechanisms, thereby forming a complete process method for removing the oxide scale from the groove of medium and thick plates.

[0017] It should be understood that although the above embodiments provide a relatively detailed textual description of the design ideas of the present invention, these textual descriptions are only simple textual descriptions of the design ideas of the present invention, rather than limitations on the design ideas of the present invention. Any combination, addition or modification that does not exceed the design ideas of the present invention shall fall within the protection scope of the present invention.

Claims

1. A process for removing oxide scale from grooves of medium and thick plates, characterized by: The mesh belt conveyor conveys the bevel cut surface of the medium and thick plate into the shot blasting room (7). The plurality of shot blasters (6) located around the shot blasting room eject steel shots with an initial velocity of up to 25 m / s to strike the bevel cut surface of the medium and thick plate located in the shot blasting room (7). After the oxide scale generated on the bevel cut surface of the medium and thick plate is removed, the mesh belt conveyor conveys the bevel cut surface of the medium and thick plate after the oxide scale is removed out of the shot blasting room. The shot collecting device (8) collects the shots ejected by the shot blaster (6) at the bottom of the shot blasting room (7) and collects them in the shot lifting device (3). The shot lifting device (3) lifts the shots to a certain height and enters the shot dust separation device (5). After separation by the shot dust separation device (5), dust impurities other than the shots are separated. The shots enter the shot blaster (6) through the shot conveying pipe (9) for recycling.

2. The process for removing oxide scale from groove of medium and thick plates according to claim 1 is characterized by: The shot blasting machine (6) is installed on the shot blasting chamber (7) at an angle of 5-18 degrees. The mounting flange of the shot blasting machine (6) is at an angle of 20 degrees to the horizontal plane and at an angle of 20 degrees to the vertical plane of the frame. This angle is designed to maximize the coverage of the shot particles in the shot blasting chamber and to ensure that the head end face and tail section of the medium and thick plate parts conveyed into the shot blasting chamber are covered by the shot particles.

3. The process for removing oxide scale from groove of medium and thick plates according to claim 1 is characterized by: The shot blasting chamber 7 is generally designed to be an octahedral structure, with 1-2 shot blasting devices (6) installed on each face, so that the interior of the shot blasting chamber is completely filled with the striking range of the steel shots.

4. The process for removing oxide scale from groove of medium and thick plates according to claim 1 is characterized by: The driving roller (2) of the mesh belt conveyor is installed on the frame (1), and the driving roller drives the mesh belt to perform a conveying movement to bring the medium and thick plate cut parts into the shot blasting chamber (7) to remove the oxide scale on the groove.

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