A clamping system for a mobile table

Abstract

The present invention relates to a clamping system for a mobile platform. The hydraulic press comprises a workbench, a column, a mobile platform and a clamping oil cylinder. There are eight clamping oil cylinders. The upper end of the clamping oil cylinder controls the clamping of the mobile platform through a clamping mechanism. The clamping mechanism comprises a clamping seat, a clamping block and a guide sleeve. The guide sleeve is installed on the workbench. The lower end of the clamping seat is connected to the upper end of the clamping oil cylinder. The clamping seat can move up and down and is located in the guide sleeve. The upper end of the clamping seat is provided with a U-shaped groove. Clamping blocks are designed on both sides of the upper end of the clamping seat. The U-shaped groove of the clamping seat cooperates with the moving guide rail to form a roller guide rail of the mobile platform. The advantage is that eight clamping oil cylinders are used for clamping at the same time. When the slider of the mobile workbench returns, the product clamping force is less than the clamping force, which ensures the working needs. At the same time, the structural change of the clamping block and the addition of brake pads are for better clamping and increasing the clamping force. The hydraulic oil control oil circuit system is reasonably designed to reduce unnecessary hydraulic pipelines, save space, and be safe and reliable.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic presses, and in particular to a clamping system of a mobile platform. Background Art

[0002] The mobile worktable of large-scale FRP products hydraulic press and composite products hydraulic press has a large product clamping force when the slider returns, and the slider is easy to pull up the mobile worktable. Generally, four large cylinders are used to clamp down at the four corners of the plane of the mobile table. Some also use a large cylinder to clamp at the center of the worktable, and four small cylinders are used to lift and move at the four corners of the plane under the mobile table. These two methods have very high requirements on the rigidity of the mobile table, occupy a large working space, are inconvenient to operate, and are inconvenient to maintain. Summary of the invention

[0003] In order to solve the above technical problems, the present invention proposes a clamping system for a mobile platform, which increases the number of oil cylinders and arranges them reasonably, simplifies the structure, and improves the performance and safety and reliability.

[0004] The technical solution of the present invention:

[0005] The movable table is provided with a clamping system of the movable table, the hydraulic press comprises a workbench, a column, a movable table and a clamping oil cylinder, the columns are respectively installed at the four corners of the upper end of the workbench, a movable guide rail is installed on the workbench, one end of the movable guide rail extends out of the workbench, and the movable table can be moved on the workbench through the movable guide rail, and the clamping oil cylinder is installed inside the workbench. The clamping oil cylinder is designed with eight, and four clamping oil cylinders are respectively installed on both sides of the workbench, and the upper end of the clamping oil cylinder controls the clamping of the movable table through a clamping mechanism; the clamping mechanism comprises a clamping seat, a clamping block and a guide sleeve, the guide sleeve is installed on the workbench, the lower end of the clamping seat is connected to the upper end of the clamping oil cylinder, the clamping seat can be moved up and down and is located in the guide sleeve, the upper end of the clamping seat is provided with a U-shaped groove, and clamping blocks are designed on both sides of the upper end of the clamping seat, and the U-shaped groove of the clamping seat cooperates with the movable guide rail to form a roller guide rail of the movable table; clamping grooves are designed on both sides of the movable table, and the clamping blocks can be moved up and down in the clamping grooves, and the clamping blocks and the clamping grooves are gap-matched.

[0006] A brake pad is installed at the lower end of the clamping block.

[0007] The brake pad is any one of an asbestos brake pad, a semi-metal brake pad, a low-metal brake pad, a NAO formula brake pad, a ceramic brake pad, and a NAO ceramic brake pad.

[0008] The brake pad comprises the following materials and weight percentages: 30-35% straw, 40-50% natural rubber, and 15-30% boron-modified phenolic resin; the above raw materials are vigorously mixed at 90 degrees Celsius for 20 minutes, and then put into a mold for molding, the temperature is 180℃±10℃, the pressure is 25MPa, and the temperature is kept for 1 minute, during which the air is released 3 times, and the length of the straw is less than 300μm.

[0009] The lower end surface of the clamping block is designed to be an inwardly inclined conical surface to form a barb shape; the lower end surface inside the clamping groove is also designed to be an inwardly inclined conical surface to form a barb shape; the inclined conical surface of the clamping block and the inclined conical surface of the clamping groove can be squeezed and matched.

[0010] The clamping system of the mobile platform also includes a hydraulic oil control oil circuit system, which includes a first hydraulically controlled one-way valve, a second hydraulically controlled one-way valve, a three-position four-way solenoid valve, a pressure relay, a first relief valve, and a second relief valve. The upper chamber of the piston of the clamping cylinder is connected to the outlet end of the first hydraulically controlled one-way valve, and the inlet end of the first hydraulically controlled one-way valve is connected to the oil port B of the three-position four-way solenoid valve; the lower chamber of the piston of the clamping cylinder is connected to the outlet end of the second hydraulically controlled one-way valve, and the inlet end of the second hydraulically controlled one-way valve is connected to the oil port B of the three-position four-way solenoid valve. The first end is connected with the A oil port of the three-position four-way solenoid valve, the P oil port of the three-position four-way solenoid valve is connected to the hydraulic oil control unit, the O oil port is connected to the oil tank, the control oil port of the first hydraulically controlled one-way valve is connected to the A oil port, the control oil port of the second hydraulically controlled one-way valve is connected to the B oil port, a first overflow valve is provided on the oil circuit between the upper chamber of the piston and the first hydraulically controlled one-way valve, a second overflow valve is provided on the oil circuit between the lower chamber of the piston and the second hydraulically controlled one-way valve, and the overflow ports of the first overflow valve and the second overflow valve are connected to the oil tank.

[0011] The advantage of the present invention is that eight clamping cylinders are used for clamping at the same time, and the product clamping force of the mobile workbench is less than the clamping force when the slider returns, thereby ensuring work needs. At the same time, the change in the clamping block structure and the addition of brake pads are for better clamping and increased clamping force; the hydraulic oil control oil circuit system is reasonably designed, which reduces unnecessary hydraulic pipelines, saves space, and is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the present invention.

[0013] Figure 2 yes Figure 1 Top view of the .

[0014] Figure 3 It is a partial schematic diagram of the clamping cylinder of the present invention.

[0015] Figure 4 It is a schematic diagram of the hydraulic oil control oil circuit system of the clamping cylinder of the present invention. DETAILED DESCRIPTION

[0016] Refer to the attached Figure 1-4 A clamping system for a mobile platform, a hydraulic press comprises a workbench 1, a column 2, a mobile platform 3 and a clamping oil cylinder 4. The columns 2 are respectively installed at the four corners of the upper end of the workbench 1. A movable guide rail 5 is installed on the workbench 1. One end of the movable guide rail 5 extends out of the workbench 1. The mobile platform 3 can be moved on the workbench 1 through the movable guide rail 5. A clamping oil cylinder 4 is installed inside the workbench 1. The clamping oil cylinder 4 is designed to have eight. Four clamping oil cylinders 4 are respectively installed on both sides of the workbench 1. The upper end of the clamping oil cylinder 4 controls the clamping of the mobile platform 3 through a clamping mechanism The clamping mechanism includes a clamping seat 6, a clamping block 7 and a guide sleeve 8. The guide sleeve 8 is installed on the workbench 1. The lower end of the clamping seat 6 is connected to the upper end of the clamping cylinder 4. The clamping seat 6 can move up and down and is located in the guide sleeve 8. The upper end of the clamping seat 6 is provided with a U-shaped groove. Clamping blocks 7 are designed on both sides of the upper end of the clamping seat 6. The U-shaped groove of the clamping seat 6 cooperates with the moving guide rail 5 to form the roller guide rail of the moving platform. The two sides of the moving platform 3 are designed with clamping grooves 9. The clamping blocks 7 can move up and down and are located in the clamping grooves 9. The clamping blocks 7 and the clamping grooves 9 are clearance-matched. The lower end of the roller 10 of the moving platform is located in the U-shaped groove.

[0017] A brake pad 80 is installed at the lower end of the clamping block 7. The brake pad 80 is any one of an asbestos brake pad, a semi-metal brake pad, a low-metal brake pad, a NAO formula brake pad, a ceramic brake pad, and a NAO ceramic brake pad. The brake pad is installed under the clamping block by bolts and nuts.

[0018] The brake pad 80 includes the following materials and weight percentages: 30-35% straw, 40-50% natural rubber or nitrile rubber, and 15-30% boron-modified phenolic resin; the above raw materials are vigorously mixed at 90 degrees Celsius for 20 minutes, and then put into a mold for molding, the temperature is 180℃±10℃, the pressure is 25MPa, and the temperature is kept for 1 minute, during which the air is released 3 times, and the length of the straw is less than 300μm. The homemade brake pad proposed by the present invention uses common straw in daily life, which saves costs.

[0019] The lower end surface of the clamping block 7 is designed to be an inwardly inclined conical surface, forming a barb shape; the lower end surface inside the clamping groove 9 is also designed to be an inwardly inclined conical surface, forming a barb shape; the inclined conical surface of the clamping block 7 and the inclined conical surface of the clamping groove 9 can be squeezed and matched. The design of the conical surface and the conical surface increases a horizontal force to ensure that the clamping is more secure.

[0020] The clamping system of the mobile platform also includes a hydraulic oil control oil circuit system, which includes a first hydraulically controlled one-way valve, a second hydraulically controlled one-way valve, a three-position four-way solenoid valve, a pressure relay, a first relief valve, and a second relief valve. The upper chamber of the piston of the clamping cylinder 4 is connected to the outlet end of the first hydraulically controlled one-way valve 15, and the inlet end of the first hydraulically controlled one-way valve 15 is connected to the oil port B of the three-position four-way solenoid valve 13; the lower chamber of the piston of the clamping cylinder 4 is connected to the outlet end of the second hydraulically controlled one-way valve 14, and the inlet end of the second hydraulically controlled one-way valve 14 is connected to the three-position four-way solenoid valve 13. The A oil port of the four-way solenoid valve 13 is connected, the P oil port of the three-position four-way solenoid valve 13 is connected to the hydraulic oil control unit 18, the O oil port is connected to the oil tank, the control oil port of the first hydraulically controlled one-way valve 15 is connected to the A oil port, the control oil port of the second hydraulically controlled one-way valve 14 is connected to the B oil port, a first overflow valve 16 is provided on the oil circuit between the upper chamber of the piston and the first hydraulically controlled one-way valve 15, a second overflow valve 12 is provided on the oil circuit between the lower chamber of the piston and the second hydraulically controlled one-way valve 14, and the overflow ports of the first overflow valve 16 and the second overflow valve 12 are connected to the oil tank. In the device, pressure relays 11 and 17 are provided after the valves of the first hydraulically controlled one-way valve and the second hydraulically controlled one-way valve. The pressure relays 11 and 17 send signals to control the lifting and lowering of the clamping oil cylinder. The design of the hydraulic system ensures work safety. During operation, if the main oil cylinder malfunctions, it will not cause other actions of the clamping oil cylinder, which is safe and reliable.

[0021] When the present invention is in use, the hydraulic oil control oil circuit system controls the upward and downward pressure of eight clamping cylinders. After the clamping cylinders are pushed up, the clamping seat moves up in the guide sleeve, and the clamping block and the moving platform are in a separated state. At the same time, the U-shaped groove of the clamping seat cooperates with the moving guide rail to form a spliced ​​roller guide rail for the roller of the moving platform to move on it; after the clamping cylinders are pressed down, the clamping seat moves down in the guide sleeve, and the lower end surface of the clamping block is squeezed and contacted with the lower end surface inside the clamping groove of the moving platform, so that the moving platform will not move left and right and will be firmly held. The design of the brake pads in the present invention further improves the holding force to prevent the undesirable problem of left and right movement due to excessive weight on the moving platform. At the same time, the present invention also designs the surfaces that are squeezed and contacted with each other as inclined surfaces, so that in the process of pressing the clamping block downward, a horizontal force will be generated in addition to the downward pressure, resulting in the moving platform being more fixed and firmly.

Claims

1. A clamping system for a mobile table, a hydraulic press comprises a workbench, a column, a mobile table and a clamping oil cylinder, columns are respectively installed at the four corners of the upper end of the workbench, a mobile guide rail is installed on the workbench, one end of the mobile guide rail extends out of the workbench, the mobile table can be moved on the workbench through the mobile guide rail, a clamping oil cylinder is installed inside the workbench, and the characteristics are: The clamping oil cylinder is designed with eight, and four clamping oil cylinders are respectively installed on both sides of the workbench. The upper end of the clamping oil cylinder controls the clamping moving platform through the clamping mechanism; the clamping mechanism includes a clamping seat, a clamping block and a guide sleeve. The guide sleeve is installed on the workbench, and the lower end of the clamping seat is connected to the upper end of the clamping oil cylinder. The clamping seat can move up and down and is located in the guide sleeve. The upper end of the clamping seat is provided with a U-shaped groove, and clamping blocks are designed on both sides of the upper end of the clamping seat. The U-shaped groove of the clamping seat cooperates with the moving guide rail to form the roller guide rail of the moving platform; the two sides of the moving platform are designed with clamping grooves, and the position where the clamping block can move up and down In the clamping groove, the clamping block and the clamping groove are in clearance fit; a brake pad is installed at the lower end of the clamping block; the lower end surface of the clamping block is designed to be an inwardly inclined conical surface to form a barb shape; the lower end surface inside the clamping groove is also designed to be an inwardly inclined conical surface to form a barb shape; the inclined conical surface of the clamping block and the inclined conical surface of the clamping groove can be squeezed and matched; the clamping system of the mobile platform also includes a hydraulic oil control oil circuit system, the hydraulic oil control oil circuit system includes a first hydraulically controlled one-way valve, a second hydraulically controlled one-way valve, a three-position four-way solenoid valve, a pressure relay, a first overflow valve, a second overflow valve, and the clamping The upper chamber of the piston of the oil cylinder is connected to the outlet end of the first hydraulically controlled one-way valve, and the inlet end of the first hydraulically controlled one-way valve is connected to the B oil port of the three-position four-way solenoid valve; the lower chamber of the piston of the clamping oil cylinder is connected to the outlet end of the second hydraulically controlled one-way valve, and the inlet end of the second hydraulically controlled one-way valve is connected to the A oil port of the three-position four-way solenoid valve, the P oil port of the three-position four-way solenoid valve is connected to the hydraulic oil control unit, the O oil port is connected to the oil tank, the control oil port of the first hydraulically controlled one-way valve is connected to the A oil port, the control oil port of the second hydraulically controlled one-way valve is connected to the B oil port, and the oil circuit between the upper chamber of the piston and the first hydraulically controlled one-way valve A first overflow valve is provided, and a second overflow valve is provided on the oil circuit between the piston lower cavity and the second hydraulically controlled one-way valve, and the overflow ports of the first overflow valve and the second overflow valve are connected to the oil tank; the brake pad comprises the following materials and weight percentages: 30-35% straw, 40-50% natural rubber, and 15-30% boron-modified phenolic resin; the above raw materials are vigorously mixed at 90 degrees Celsius for 20 minutes, and then put into a mold for molding, the temperature is 180℃±10℃, the pressure is 25MPa, and the temperature is kept for 1 minute, during which the air is released 3 times, and the length of the straw is less than 300μm.

Images