Automatic electromagnetic shot cleaning device and shot cleaning method for wide and thick plate after heat treatment shot blasting

Abstract

The invention discloses an automatic electromagnetic shot cleaning device and a shot cleaning method after heat treatment shot blasting of a wide and thick plate, and mainly relates to the technical field of intelligent control of steel heat treatment. Comprising a frame, the frame is a main body for supporting the shot cleaning device, is in the form of a gantry crane, stretches across a rear roller way of the heat treatment shot blasting machine and is used for supporting the whole shot cleaning device, the width of the frame is larger than that of the heat treatment roller way, and a hopper is arranged on one side of the frame and used for receiving material shots. A lifting unit, an electromagnetic pill cleaning unit, a pill groove rotating unit, a compressed air blowing unit and an automatic control unit are respectively arranged on brackets on two sides of the frame. The method has the beneficial effects that the problem that shots remain on a steel plate after shot blasting in a wide and thick plate heat treatment area is solved, and the surface quality of the steel plate is improved.

Description

Technical Field

[0001] The invention relates to the technical field of intelligent control of heat treatment of steel, in particular to an automatic electromagnetic shot cleaning device and a shot cleaning method after shot blasting of a wide and thick plate during heat treatment. Background Art

[0002] The residual shot after heat treatment shot blasting of wide and thick plates is one of the important factors affecting the surface quality of steel plates. Heat-treated steel plates are generally high-value-added products. The surface quality of the steel plates where the shot is pressed in will cause quality objections, customer complaints or claims, which may lead to the downgrading or scrapping of the steel plates, bringing greater cost pressure and quality loss to the company. At present, the production line is basically processed by manual compressed air blowing. During production, the compressed air valve is opened manually, and the steel plate shot is blown clean by the compressed air pressure drop. This method has great disadvantages. First, the valve is frequently opened and closed manually, the operation intensity is high, and even the valve is forgotten to be opened and closed, which easily causes the steel plate shot to be unable to be cleaned or the compressed air is wasted. Second, the angle pressure of compressed air is certain, while the width of the steel plate is variable, and the phenomenon of not being able to blow the complete surface of the steel plate occurs, and there are still residual shot on the surface of the steel plate; what's more, manual cleaning is arranged by using tools such as brooms or mops to clean the shot that can be seen by the naked eye. This method is labor-intensive and has safety hazards. Second, it is completely dependent on manual cleaning, which is not conducive to intelligent improvement, and it cannot guarantee the complete removal of residual shot on the steel plate. Therefore, it is particularly necessary and urgent to develop a device and method for automatically cleaning residual pills on steel plates to replace the existing manual cleaning and eliminate the quality problem of pills pressed into the surface of the steel plates. The present invention innovatively adopts the characteristic that the pills used are magnetic materials, and uses an electromagnet adsorption scheme to solve this problem. It can maximize the solution to the problems of high labor intensity, many safety hazards, unclean cleaning, and low degree of automation.

[0003] The key point of the invention patent "A device for blowing residual pills after steel plate shot blasting CN113263023A" is that the gas enters the purge main pipe through the air inlet pipe, and the gas inside the purge main pipe is transmitted through the air outlet pipe and the purge branch pipe, and blown out from the purge head. The gas blown out of the purge head can purge the pills on the steel plate; the key point of the utility model patent "device for blowing residual pills on the surface of steel plate after shot blasting CN203636646U" is that the frame is equipped with an electro-hydraulic push rod and a high-pressure air pump, and a door-shaped lifting frame is hinged at one end of the top surface of the frame, and the front cleaning roller, the drive motor, the high-pressure injection pipe and the rear cleaning roller are arranged in sequence. The front and rear cleaning rollers are driven to rotate by the drive motor, and the axial wall below the high-pressure injection pipe is concave to form a groove, and the walls of the injection pipes on both sides of the groove are respectively provided with high-pressure gas injection holes or injection slits. These studies and methods have achieved certain results, but there is a lack of corresponding research and methods in automatic control and electromagnetic pill cleaning.

[0004] Therefore, there is an urgent need for an automatic electromagnetic shot cleaning device and a shot cleaning method after heat treatment shot blasting of wide and thick plates to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide an automatic electromagnetic shot cleaning device and a shot cleaning control method for thick and wide plates after heat treatment shot blasting, which solves the problem of residual shot on the steel plate after shot blasting in the heat treatment area of ​​the thick and wide plates and improves the surface quality of the steel plate.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] On the one hand, an automatic electromagnetic shot cleaning device after heat treatment shot blasting of wide and thick plates is provided, comprising a frame, wherein the frame is the main body supporting the shot cleaning device, and is in the form of a gantry crane, spanning across the rear roller of the heat treatment shot blasting machine, and is used to support the entire shot cleaning device, the width of the frame is greater than the width of the heat treatment roller, and a hopper is provided on one side of the frame, and the hopper is used to receive shot, and a lifting unit, an electromagnetic shot cleaning unit, a shot trough rotating unit, a compressed air blowing unit and an automatic control unit are respectively provided on the two side brackets of the frame.

[0008] Preferably, the device lifting unit includes two first pneumatic cylinders and two first solenoid valves, the two first pneumatic cylinders and the two first solenoid valves are respectively arranged on the two side brackets of the frame, the first pneumatic cylinder is connected to the bottom of the electromagnetic shot cleaning unit, and the stroke of the pneumatic cylinder is set according to the thickness of the steel plate and the magnetic force of the first solenoid valve, and is used to support the electromagnetic shot cleaning unit to move up and down.

[0009] Preferably, the electromagnetic shot cleaning unit comprises a long electromagnet and a bracket, on which a shot groove, a shot groove rotating unit and a compressed air blowing unit are arranged, and the lengths of the long electromagnet, the bracket and the shot groove are set according to the width of the heat-treated steel plate.

[0010] Preferably, the pill trough rotation unit includes two second pneumatic cylinders and two second solenoid valves, and the two second pneumatic cylinders and the two second solenoid valves are respectively arranged on both sides of the pill trough, and the pneumatic cylinder stroke is set according to the pill trough rotation angle and the rotating arm length, and the two pneumatic cylinders are synchronously controlled to support the pill trough to rotate 90 degrees.

[0011] Preferably, the compressed air blowing unit includes an air nozzle solenoid valve, which consists of a blowing part and an air blowing pipe. Side nozzles are evenly arranged on the air blowing pipe. The compressed air intake is on one side and is used to blow and clean the iron shots into the hopper on the other side.

[0012] Preferably, the automatic control unit includes a steel plate detector, an input unit, a logic controller and an output unit, which are used for logic signal processing of the entire system and control the normal operation of the system to complete the automatic pill clearing function.

[0013] On the other hand, a shot cleaning method for the automatic electromagnetic shot cleaning device after the heat treatment shot blasting of the wide and thick plate is also provided, comprising the following steps:

[0014] S1: The automatic control unit is used for self-checking of the entire device system to ensure the normal state of the device;

[0015] S2: The steel plate detector of the automatic control unit detects whether the steel plate is in place;

[0016] S3: When the steel plate is detected to be in place, a descending command is issued, and the two solenoid valves of the device lifting unit are energized at the same time. Two pneumatic cylinders drive the electromagnetic shot cleaning unit, the shot trough rotating unit and the compressed air blowing unit to descend into place. The stroke of the pneumatic cylinder is a fixed stroke, which is designed according to the thickness of the steel plate and the capacity of the electromagnet.

[0017] S4: After the electromagnetic pill cleaning unit is lowered into place, the electromagnet of the electromagnetic pill cleaning unit is energized;

[0018] S5: The electromagnet starts to magnetically attract the pellets, and the steel plate runs slowly on the roller table;

[0019] S6: Whether the steel plate detector detects that the steel plate has left, if not, continue to step S5;

[0020] S7: The steel plate detector detects that the steel plate has left, and the automatic control unit issues a rising command. The two solenoid valves of the device lifting unit lose power at the same time, and the two pneumatic cylinders drive the electromagnetic pill cleaning unit to rise to the position with the pill trough rotating unit and the compressed air purge unit;

[0021] S8: After the electromagnetic pill cleaning unit rises to its position, the automatic control unit issues a pill trough rotation command, the two solenoid valves of the pill trough rotation unit are energized, and the two pneumatic cylinders drive the pill trough to rotate 90 degrees, so that the pill trough rotates to the bottom of the electromagnet of the electromagnetic pill cleaning unit;

[0022] S9: After the rotation is in place, the automatic control unit issues a power-off command for the generating magnet, the electromagnet of the electromagnetic shot cleaning unit loses power, and the shot automatically falls off the electromagnet into the shot trough;

[0023] S10: After the electromagnet loses power for a period of time, the automatic control unit issues an air pressure purge command, the solenoid valve of the air pressure purge unit is energized, a certain air pressure is maintained, and the pills in the pill trough are purged into the hopper. The purge time is an empirical value obtained from actual tests. When the time is up, the solenoid valve of the air pressure purge unit loses power and the purge stops;

[0024] S11: The automatic control unit sends a command for the pill trough to return to its original position. The two solenoid valves of the pill trough rotation unit lose power, and the pneumatic cylinder drives the pill trough to rotate 90 degrees back to its original position.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. The present invention uses electromagnetic principles to solve the problem of controllable magnetic adsorption of pills, which has a higher advantage compared with compressed air purging and manual cleaning, which are inflexible treatment methods;

[0027] 2. The device of the invention has a high degree of automation and does not require manual intervention. The operator only needs to regularly monitor the surface quality of the steel plate and transport the collected pellets. Other work does not need to be intervened, and the device works completely automatically;

[0028] 3. The device of the invention can meet the requirements of residual shot cleaning of heat-treated steel plates of various thicknesses and widths, and is not limited by the influence of the residual shot amount caused by the steel plate specifications;

[0029] 4. This method has simple process, high production efficiency, and controlled use of electricity and compressed air, saving energy costs;

[0030] 5. This method can be applied to all plate and strip heat treatment shot blasting production lines, and has great application space and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the composition of the device system of the present invention;

[0032] Figure 2 It is a schematic diagram of the structure of the device body of the present invention;

[0033] Figure 3 It is a schematic diagram of the composition of the pill cleaning unit of the device of the present invention;

[0034] Figure 4 It is a schematic diagram of a process flow of a method for using the device described in the present invention.

[0035] Numbers shown in the accompanying drawings:

[0036] 1. Frame; 2. Device lifting unit; 3. Electromagnetic pill cleaning unit; 4. Hopper; 31. Pill trough rotating unit; 32. Long electromagnet; 33. Compressed air blowing unit; 34. Pill trough; 35. Bracket. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the application equally.

[0038] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention and should not be understood as limitations on the present invention.

[0039] In the present invention, terms such as "fixed connection", "connected", "connection", etc. should be understood in a broad sense, indicating that it can be fixedly connected, integrally connected or detachably connected; it can be directly connected or indirectly connected through an intermediate medium. Relevant scientific research or technical personnel in this field can determine the specific meanings of the above terms in the present invention according to specific circumstances, and they should not be understood as limiting the present invention.

[0040] Example:

[0041] like Figure 1 As shown, this embodiment provides an automatic electromagnetic shot cleaning device after heat treatment shot blasting of wide and thick plates, including a frame, which is the main body supporting the shot cleaning device and is in the form of a gantry crane, spanning across the rear roller of the heat treatment shot blasting machine to support the entire shot cleaning device, the width of the frame is greater than the width of the heat treatment roller, and a hopper is provided on one side of the frame, the hopper is used to receive shot, and a lifting unit, an electromagnetic shot cleaning unit, a shot trough rotating unit, a compressed air blowing unit and an automatic control unit are respectively provided on the two side brackets of the frame.

[0042] like Figure 2 As shown, the frame is the main body of the supporting device. The frame is in the form of a gantry crane, spanning the rear roller of the heat treatment shot blasting machine to support the entire device. The width of the frame is determined according to the width of the heat treatment roller. A hopper is provided on one side to receive the shot.

[0043] The lifting unit of the device is composed of two pneumatic cylinders and two solenoid valves, with one set of pneumatic cylinders and solenoid valves on the left and right sides. The pneumatic cylinder is connected to the bottom of the electromagnetic shot cleaning unit. The stroke of the pneumatic cylinder is designed according to the thickness of the steel plate and the magnetic force of the electromagnet. The two pneumatic cylinders are controlled synchronously to support the electromagnetic shot cleaning unit to move up and down.

[0044] like Figure 3 As shown, the electromagnetic shot cleaning unit includes a long electromagnet and a bracket, a shot groove is attached to the bracket, a shot groove rotating unit and a compressed air blowing unit. The length of the electromagnet, the bracket and the shot groove is determined according to the width of the heat-treated steel plate.

[0045] The pill trough rotation unit consists of two pneumatic cylinders and two solenoid valves, one on each side of the pneumatic cylinder and the solenoid valve. The stroke of the pneumatic cylinder is determined by the pill trough rotation angle and the length of the rotating arm. The two pneumatic cylinders are synchronously controlled to support the pill trough to rotate 90 degrees.

[0046] The compressed air blowing unit consists of an air nozzle solenoid valve to form a blowing part and an air blowing pipeline. Side nozzles are evenly arranged on the pipeline. The compressed air intake is on one side, which is responsible for blowing and cleaning the iron balls into the hopper on the other side.

[0047] The automatic control unit includes a steel plate detector, an input unit, a logic controller, and an output unit. It is responsible for the logic signal processing of the entire system and controls the normal operation of the system to complete the automatic pill cleaning function.

[0048] like Figure 4 As shown, this embodiment also provides a shot cleaning method for the automatic electromagnetic shot cleaning device after the heat treatment shot blasting of the wide and thick plate, comprising the following steps:

[0049] S1: The automatic control unit is responsible for the self-check of the entire device system to ensure the normal state of the device;

[0050] S2: The steel plate detector of the automatic control unit detects whether the steel plate is in place. The steel plate detector is installed 1m in front of the device;

[0051] S3: When the steel plate is in place, a descending command is issued, and the two solenoid valves of the device lifting unit are energized at the same time. The two pneumatic cylinders drive the electromagnetic shot cleaning unit, the shot trough rotating unit and the compressed air blowing unit to descend to their positions. The stroke of the pneumatic cylinder is a fixed stroke (50cm);

[0052] S4: After the electromagnetic pill cleaning unit is lowered into place, the electromagnet of the electromagnetic pill cleaning unit is energized;

[0053] S5: The electromagnet starts to magnetically attract the pellets, and the steel plate runs slowly on the roller at a speed of 1m / s.

[0054] S6: Whether the steel plate detector detects that the steel plate has left, if not, continue to step S5;

[0055] S7: The steel plate detector detects that the steel plate has left, and the automatic control unit issues a rising command. The two solenoid valves of the device lifting unit lose power at the same time, and the two pneumatic cylinders drive the electromagnetic pill cleaning unit to rise to the position with the pill trough rotating unit and the compressed air purge unit;

[0056] S8: After the electromagnetic pill cleaning unit rises to its position, the automatic control unit issues a pill trough rotation command, the two solenoid valves of the pill trough rotation unit are energized, and the two pneumatic cylinders drive the pill trough to rotate 90 degrees, so that the pill trough rotates to the bottom of the electromagnet of the electromagnetic pill cleaning unit;

[0057] S9: After the rotation is in place, the automatic control unit issues a power-off command for the electromagnet, and the electromagnet loses power, causing the pellets to automatically fall off the electromagnet into the pellet trough;

[0058] S10: After the electromagnet loses power for a period of time, the automatic control unit issues a pneumatic purge command, the solenoid valve of the pneumatic purge unit is energized, and a certain air pressure is used to purge the pellets into the pellet collection device. The purge time is 1 minute. After the time is up, the solenoid valve of the pneumatic purge unit loses power and the purge stops;

[0059] S11: The automatic control unit sends a command for the pill trough to return to its original position. The two solenoid valves of the pill trough rotation unit lose power, and the pneumatic cylinder drives the pill trough to rotate 90 degrees and return to its original position.

[0060] It should be noted that the specific embodiments of the present invention have been described in detail. For those skilled in the art, various obvious changes are within the protection scope of the present invention without departing from the spirit and scope of the present invention.

Claims

1. An automatic electromagnetic shot cleaning device after heat treatment shot blasting of wide and thick plates, characterized in that: The invention comprises a frame, which is the main body supporting the shot cleaning device and is in the form of a gantry crane. The frame spans across the rear roller of the heat treatment shot blasting machine and is used to support the entire shot cleaning device. The width of the frame is greater than the width of the heat treatment roller, and a hopper is arranged on one side of the frame. The hopper is used to receive the shot. A lifting unit, an electromagnetic shot cleaning unit, a shot trough rotating unit, a compressed air blowing unit and an automatic control unit are respectively arranged on the brackets on both sides of the frame.

2. According to claim 1, an automatic electromagnetic shot cleaning device for thick and wide plates after heat treatment shot blasting, characterized in that: The device lifting unit includes two first pneumatic cylinders and two first solenoid valves, which are respectively arranged on the two side brackets of the frame. The first pneumatic cylinder is connected to the bottom of the electromagnetic shot cleaning unit. The stroke of the pneumatic cylinder is set according to the thickness of the steel plate and the magnetic force of the first solenoid valve, and is used to support the electromagnetic shot cleaning unit to move up and down.

3. According to claim 2, an automatic electromagnetic shot cleaning device for thick and wide plates after heat treatment shot blasting is characterized in that: The electromagnetic shot cleaning unit comprises a long electromagnet and a bracket, on which a shot groove, a shot groove rotating unit and a compressed air blowing unit are arranged, and the lengths of the long electromagnet, the bracket and the shot groove are set according to the width of the heat-treated steel plate.

4. According to claim 3, an automatic electromagnetic shot cleaning device for thick and wide plates after heat treatment shot blasting is characterized in that: The pill trough rotation unit includes two second pneumatic cylinders and two second solenoid valves, which are respectively arranged on both sides of the pill trough. The stroke of the pneumatic cylinder is set according to the rotation angle of the pill trough and the length of the rotating arm. The two pneumatic cylinders are synchronously controlled to support the pill trough to rotate 90 degrees.

5. According to claim 4, an automatic electromagnetic shot cleaning device for thick and wide plates after heat treatment shot blasting is characterized in that: The compressed air blowing unit includes an air nozzle solenoid valve, which consists of a blowing part and an air blowing pipeline. Lateral nozzles are evenly arranged on the air blowing pipeline. The compressed air intake is on one side and is used to blow and clean the iron shots into the hopper on the other side.

6. According to claim 1, the automatic electromagnetic shot cleaning device for thick and wide plates after heat treatment shot blasting is characterized in that: The automatic control unit includes a steel plate detector, an input unit, a logic controller and an output unit, which are used for logic signal processing of the entire system and control the normal operation of the system to complete the automatic pill clearing function.

7. A shot cleaning method applied to the automatic electromagnetic shot cleaning device after heat treatment shot blasting of wide and thick plates as claimed in claim 6, characterized in that: The following steps are involved: S1: The automatic control unit is used for self-checking of the entire device system to ensure the normal state of the device; S2: The steel plate detector of the automatic control unit detects whether the steel plate is in place; S3: When the steel plate is detected to be in place, a descending command is issued, and the two solenoid valves of the device lifting unit are energized at the same time. Two pneumatic cylinders drive the electromagnetic shot cleaning unit, the shot trough rotating unit and the compressed air blowing unit to descend into place. The stroke of the pneumatic cylinder is a fixed stroke, which is designed according to the thickness of the steel plate and the capacity of the electromagnet. S4: After the electromagnetic pill cleaning unit is lowered into place, the electromagnet of the electromagnetic pill cleaning unit is energized; S5: The electromagnet starts to magnetically attract the pellets, and the steel plate runs slowly on the roller table; S6: Whether the steel plate detector detects that the steel plate has left, if not, continue to step S5; S7: The steel plate detector detects that the steel plate has left, and the automatic control unit issues a rising command. The two solenoid valves of the device lifting unit lose power at the same time, and the two pneumatic cylinders drive the electromagnetic pill cleaning unit to rise to the position with the pill trough rotating unit and the compressed air purge unit; S8: After the electromagnetic pill cleaning unit rises to its position, the automatic control unit issues a pill trough rotation command, the two solenoid valves of the pill trough rotation unit are energized, and the two pneumatic cylinders drive the pill trough to rotate 90 degrees, so that the pill trough rotates to the bottom of the electromagnet of the electromagnetic pill cleaning unit; S9: After the rotation is in place, the automatic control unit issues a power-off command for the generating magnet, the electromagnet of the electromagnetic shot cleaning unit loses power, and the shot automatically falls off the electromagnet into the shot trough; S10: After the electromagnet loses power for a period of time, the automatic control unit issues an air pressure purge command, the solenoid valve of the air pressure purge unit is energized, a certain air pressure is maintained, and the pills in the pill trough are purged into the hopper. The purge time is an empirical value obtained from actual tests. When the time is up, the solenoid valve of the air pressure purge unit loses power and the purge stops; S11: The automatic control unit sends a command for the pill trough to return to its original position. The two solenoid valves of the pill trough rotation unit lose power, and the pneumatic cylinder drives the pill trough to rotate 90 degrees and return to its original position.

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