Grinding machine soft landing safety device and control method

Abstract

The invention relates to a grinding machine soft landing safety device and a control method, the grinding machine soft landing safety device comprises a base body, guide columns, a hydraulic system, a hydraulic cylinder and a saddle, the hydraulic cylinder and the guide columns are fixedly connected with the base, the guide columns are symmetrically arranged on the two sides of the base and connected with the saddle through the base body, the saddle is used for bearing a roller, and the guide columns are driven by the hydraulic cylinder to ascend and descend. The hydraulic system is used for driving the hydraulic cylinder to stretch. The three-position four-way reversing valve has the advantages that the three-position four-way reversing valve is arranged between the oil tank and the rod cavity of the hydraulic cylinder, the lifting / falling action of the oil cylinder is finally realized by electrifying or de-electrifying the coil A and the coil B of the three-position four-way reversing valve, the structure is simple, the operation is simple, and the maintenance is convenient; a first ball valve is arranged between the first hydraulic control one-way valve and a rod cavity of the hydraulic cylinder, a second ball valve is arranged between the second hydraulic control one-way valve and a rodless cavity of the hydraulic cylinder, oil supply of the oil tank is cut off by closing the first ball valve and the second ball valve after operation of the soft landing device is completed, and the situation that a grinding machine and a roller are damaged due to damage of a soft landing system is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of roll grinders, and in particular to a grinder soft landing safety device and a control method. Background Art

[0002] At present, in the roller mills for hot rolling, cold rolling and non-ferrous plate processing, roller grinders are usually used to machine the rollers. When the rollers are processed on the grinders, a soft landing device is required to slowly place the rollers on the support device. If the hydraulic system of the soft landing device fails, such as damage or leakage of the electromagnetic reversing valve, hydraulic control check valve, or hydraulic cylinder, the soft landing device will rise uncontrollably, causing damage to the grinder and rollers, resulting in economic losses to the factory. Summary of the invention

[0003] The purpose of the present invention is to provide a grinding machine soft landing safety device and a control method, thereby improving the safety and stability of the soft landing device.

[0004] To achieve the above object, the present invention is implemented through the following technical solutions:

[0005] A soft landing safety device for a grinding machine comprises a rolling roller, a seat body, a guide column, a hydraulic system, a hydraulic cylinder and a saddle. The hydraulic cylinder and the guide column are fixedly connected to the base. The guide columns are symmetrically arranged on both sides of the base. The guide columns are connected to the saddle through the seat body. The saddle is used to support the rolling roller. The guide columns are driven to rise and fall by corresponding hydraulic cylinders. The hydraulic system is used to drive the hydraulic cylinders to extend and retract.

[0006] The hydraulic system includes a speed regulating valve 1, a speed regulating valve 2, a stop valve 1, a stop valve 2, a hydraulically controlled non-return valve 1, a hydraulically controlled non-return valve 2, and an electromagnetic reversing valve. The oil inlet of the hydraulically controlled non-return valve 1 is connected to the A port of the electromagnetic reversing valve, the oil outlet of the hydraulically controlled non-return valve 1 is connected to the stop valve 1, and the other end of the stop valve 1 is respectively connected to the rod chamber of the hydraulic cylinder; the oil inlet of the hydraulically controlled non-return valve 2 is connected to the B port of the electromagnetic reversing valve, the oil outlet of the hydraulically controlled non-return valve 2 is connected to the stop valve 2, and the other end of the stop valve 2 is respectively connected to the rodless chamber of the hydraulic cylinder through the speed regulating valve 1 and the speed regulating valve 2.

[0007] The P port and T port of the electromagnetic reversing valve are connected to the oil tank.

[0008] The electromagnetic reversing valve is a three-position four-way reversing valve.

[0009] Both stop valve 1 and stop valve 2 are ball valves.

[0010] A grinding machine soft landing safety control method, the control method, the content is as follows:

[0011] 1) The coil A of the three-position four-way reversing valve is energized and the coil B is de-energized

[0012] The three-position four-way reversing valve is actuated, and the hydraulic oil flows through the hydraulic control check valve 2, the ball valve 2, the speed regulating valve 1, the speed regulating valve 2, and enters the hydraulic cylinder 1 and the hydraulic cylinder 2. The hydraulic cylinder 1 and the hydraulic cylinder 2 are lifted up to the position at the same time, and the roller is placed on the saddle;

[0013] 2) The coil B of the three-position four-way reversing valve is energized and the coil A is de-energized

[0014] Hydraulic cylinder 1 and hydraulic cylinder 2 slowly descend along with the guide column. After they descend to the middle position, the rollers are supported by the support. Hydraulic cylinder 1 and hydraulic cylinder 2 continue to descend to the bottom. The hydraulic oil flows through ball valve 1, hydraulic control check valve 1, and three-position four-way reversing valve and flows back to the oil tank. Then ball valve 1 and ball valve 2 are closed.

[0015] 3) The coil A of the three-position four-way reversing valve loses power, and the coil B loses power

[0016] The rolls were repaired by grinding.

[0017] Both ball valve 1 and ball valve 2 are manual ball valves.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. A three-position four-way reversing valve is used between the oil tank and the rod chamber of the hydraulic cylinder. The coil A and coil B of the three-position four-way reversing valve are energized or de-energized to finally realize the lifting / falling action of the oil cylinder. It has a simple structure, simple operation and convenient maintenance.

[0020] 2. A ball valve 1 is used between the hydraulically controlled one-way valve 1 and the rod chamber of the hydraulic cylinder, and a ball valve 2 is used between the hydraulically controlled one-way valve 2 and the rodless chamber of the hydraulic cylinder. After the soft landing device is operated, the ball valves 1 and 2 are manually closed to cut off the oil supply from the oil tank to the hydraulic cylinder to prevent the soft landing system from being damaged, which may cause damage to the grinder and rollers.

[0021] 3. Speed ​​regulating valve 1 and speed regulating valve 2 are used between ball valve 2 and the rodless chamber of the hydraulic cylinder to facilitate maintenance personnel to adjust the lifting speed of the hydraulic cylinder;

[0022] 4. The use of valve blocks to achieve integration can reduce space occupancy, reduce hydraulic oil leakage, and facilitate maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is the front view of the soft landing safety device of the grinder.

[0024] Figure 2 It is a side view of the soft landing safety device of the grinder.

[0025] Figure 3 It is a schematic diagram of the hydraulic system principle of the grinder soft landing safety device.

[0026] In the figure: 1- three-position four-way reversing valve 2- hydraulically controlled one-way valve 1 3- ball valve 1 4- ball valve 2 5- speed regulating valve 1 6- speed regulating valve 2 7- hydraulic cylinder 1 8- hydraulic cylinder 2 9- valve block 10- hydraulically controlled one-way valve 2 12- seat body 13- bolt 14- saddle 15- roller 16- guide column 17- base 18- support valve. DETAILED DESCRIPTION

[0027] The present invention is described in detail below in conjunction with the accompanying drawings, but it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0028] The following examples are implemented on the premise of the technical solution of the present invention, and provide detailed implementation methods and specific operation processes, but the protection scope of the present invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

[0029] [Example 1]

[0030] See Figure 1 to Figure 3 A soft landing safety device for a grinding machine includes a roller 15, a seat body 12, a guide column 16, a hydraulic system, a hydraulic cylinder, and a saddle 14. The hydraulic system includes a speed regulating valve 15, a speed regulating valve 26, a ball valve 13, a ball valve 24, a hydraulically controlled one-way valve 12, a hydraulically controlled one-way valve 210, and a three-position four-way reversing valve 1. The hydraulically controlled one-way valve 12, the hydraulically controlled one-way valve 210, and the three-position four-way reversing valve 1 are arranged on a valve block 9 and connected through an oil circuit in the valve block 9. The hydraulic cylinder and the guide column 16 are both fixedly connected to a base 17. The guide columns 16 are symmetrically arranged on both sides of the base 17. The guide columns 16 are connected to the saddle 14 through the seat body 12. The saddle 14 is used to support the roller 15, and the guide column 16 is driven to rise and fall by the corresponding hydraulic cylinder. The hydraulic system is used to drive the hydraulic cylinder to extend and retract; the oil inlet of the hydraulically controlled one-way valve 2 is connected to the A port of the three-position four-way reversing valve 1, and the oil outlet of the hydraulically controlled one-way valve 2 is connected to the ball valve 3, and the other end of the ball valve 3 is respectively connected to the rod cavity of the hydraulic cylinder; the oil inlet of the hydraulically controlled one-way valve 2 10 is connected to the B port of the three-position four-way reversing valve 1, and the oil outlet of the hydraulically controlled one-way valve 2 10 is connected to the ball valve 2 4, and the other end of the ball valve 2 4 is respectively connected to the rodless cavity of the hydraulic cylinder through the speed regulating valve 1 5 and the speed regulating valve 2 6; the P port and T port of the three-position four-way reversing valve 1 are connected to the oil tank.

[0031] A grinding machine soft landing control method, specifically comprising:

[0032] 1) Coil A of three-position four-way directional valve 1 is energized and coil B is de-energized

[0033] The three-position four-way reversing valve 1 is actuated, and the hydraulic oil flows through the hydraulic control check valve 2 10, the ball valve 2 4, the speed regulating valve 1 5, the speed regulating valve 2 6, and enters the hydraulic cylinder 1 7 and the hydraulic cylinder 2 8. The hydraulic cylinder 1 7 and the hydraulic cylinder 2 8 are lifted up to the position at the same time, and the roller 15 is placed on the saddle 14;

[0034] 2) Coil B of three-position four-way directional valve 1 is energized, and coil A is de-energized

[0035] Hydraulic cylinder 1 7 and hydraulic cylinder 2 8 slowly descend along with guide column 16, and after descending to the middle position, roller 15 is supported by support shoe 18, and hydraulic cylinder 1 7 and hydraulic cylinder 2 8 continue to descend to the bottom, and hydraulic oil flows through ball valve 1 3, hydraulic control check valve 1 2, and three-position four-way reversing valve 1 to flow back to the oil tank, and then ball valve 1 3 and ball valve 2 4 are closed;

[0036] 3) Coil A of three-position four-way directional valve 1 loses power, and coil B loses power

[0037] The roll 15 is ground and repaired.

[0038] The present invention adopts a three-position four-way reversing valve between the oil tank and the rod chamber of the hydraulic cylinder. The coil A and coil B of the three-position four-way reversing valve are energized or de-energized to finally realize the lifting / lowering action of the oil cylinder. The structure is simple, the operation is simple, and the maintenance is convenient. A ball valve one is adopted between the hydraulically controlled one-way valve one and the rod chamber of the hydraulic cylinder, and a ball valve two is adopted between the hydraulically controlled one-way valve two and the rodless chamber of the hydraulic cylinder. After the soft landing device is operated, the oil supply to the oil tank is cut off by closing the ball valve one and the ball valve two to prevent the soft landing system from being damaged, which may cause damage to the grinder and the rolling roller. A speed regulating valve one and a speed regulating valve two are adopted between the ball valve two and the rodless chamber of the hydraulic cylinder to facilitate the maintenance personnel to adjust the lifting speed of the hydraulic cylinder. The valve block is adopted to realize integration, which can reduce space occupancy, reduce hydraulic oil leakage, and facilitate maintenance.

Claims

1. A grinding machine soft landing safety device, comprising a roller, characterized in that: It also includes a seat body, a guide column, a hydraulic system, a hydraulic cylinder, and a saddle. The hydraulic cylinder and the guide column are fixedly connected to the base. The guide columns are symmetrically arranged on both sides of the base. The guide columns are connected to the saddle through the seat body. The saddle is used to support the rolling rollers. The guide columns are driven to rise and fall by the corresponding hydraulic cylinders, and the hydraulic system is used to drive the hydraulic cylinders to extend and retract.

2. A grinding machine soft landing safety device according to claim 1, characterized in that: The hydraulic system includes a speed regulating valve 1, a speed regulating valve 2, a stop valve 1, a stop valve 2, a hydraulically controlled non-return valve 1, a hydraulically controlled non-return valve 2, and an electromagnetic reversing valve. The oil inlet of the hydraulically controlled non-return valve 1 is connected to the A port of the electromagnetic reversing valve, the oil outlet of the hydraulically controlled non-return valve 1 is connected to the stop valve 1, and the other end of the stop valve 1 is respectively connected to the rod chamber of the hydraulic cylinder; the oil inlet of the hydraulically controlled non-return valve 2 is connected to the B port of the electromagnetic reversing valve, the oil outlet of the hydraulically controlled non-return valve 2 is connected to the stop valve 2, and the other end of the stop valve 2 is respectively connected to the rodless chamber of the hydraulic cylinder through the speed regulating valve 1 and the speed regulating valve 2.

3. A grinding machine soft landing safety device according to claim 2, characterized in that: The P port and T port of the electromagnetic reversing valve are connected to the oil tank.

4. A grinding machine soft landing safety device according to claim 2, characterized in that: The electromagnetic reversing valve is a three-position four-way reversing valve.

5. The soft landing safety device for a grinding machine according to claim 2, characterized in that: The first stop valve and the second stop valve are both ball valves.

6. The device according to any one of claims 1 to 5 is used in a grinding machine soft landing safety control method, characterized in that: The control method is as follows: 1) The coil A of the three-position four-way reversing valve is energized and the coil B is de-energized The three-position four-way reversing valve is actuated, and the hydraulic oil flows through the hydraulic control check valve 2, the ball valve 2, the speed regulating valve 1, the speed regulating valve 2, and enters the hydraulic cylinder 1 and the hydraulic cylinder 2. The hydraulic cylinder 1 and the hydraulic cylinder 2 are lifted up to the position at the same time, and the roller is placed on the saddle; 2) The coil B of the three-position four-way reversing valve is energized and the coil A is de-energized Hydraulic cylinder 1 and hydraulic cylinder 2 slowly descend along with the guide column. After they descend to the middle position, the rollers are supported by the support. Hydraulic cylinder 1 and hydraulic cylinder 2 continue to descend to the bottom. The hydraulic oil flows through ball valve 1, hydraulic control check valve 1, and three-position four-way reversing valve and flows back to the oil tank. Then ball valve 1 and ball valve 2 are closed. 3) The coil A of the three-position four-way reversing valve loses power, and the coil B loses power The rolls were repaired by grinding.

7. A grinding machine soft landing safety control method according to claim 6, characterized in that: The ball valve one and the ball valve two are both manual ball valves.

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