A hydraulic control system and a split tray lifting and pushing mechanism using the same

Abstract

The present invention belongs to the technical field of clamping equipment, and relates to a hydraulic control system and a split-type pallet lifting and pushing mechanism using the hydraulic control system, comprising a first side-pushing oil cylinder, a second side-pushing oil cylinder, a first lifting oil cylinder, and a second lifting oil cylinder; the rod chamber of the first side-pushing oil cylinder and the rod chamber of the second side-pushing oil cylinder are connected to the oil outlet of the first one-way throttle valve through an oil pipe, the oil inlet of the first one-way throttle valve is connected to the hydraulic one-way valve through an oil pipe, and the hydraulic one-way valve is connected to the clamping oil port of the fixture; the rodless chamber of the first side-pushing oil cylinder and the rodless chamber of the second side-pushing oil cylinder are connected to one end of the second one-way throttle valve through an oil pipe, the other end of the second one-way throttle valve is connected to one end of a fourth one-way sequence valve, the other end of the fourth one-way sequence valve is connected to one end of a third one-way sequence valve, and the other end of the third one-way sequence valve is connected to the clamp release oil port. The control system can realize the lifting and clamping of the workpiece, and the work is reliable and stable.

Description

Technical Field

[0001] The invention belongs to the technical field of clamping equipment and relates to a hydraulic control system and a split tray lifting and pushing mechanism using the hydraulic control system. Background Art

[0002] With the continuous development of the automobile industry, the processing accuracy requirements for automobile parts are getting higher and higher. During processing, in order to ensure the relative position accuracy between multiple processing surfaces, multi-surface processing is often performed at one station. For the cylinder body processing line, a roller line is used to transfer the cylinder body between stations. Before loading the cylinder body, the lifting tray on the fixture in the machine tool is raised, and the height of the tray is consistent with the height of the pusher mechanism line outside the machine tool. The cylinder body is manually pushed from the pusher mechanism outside the machine tool to the fixture tray in the machine tool. After that, the fixture tray descends, and the cylinder body is inserted into the positioning pin of the fixture under the action of its own weight, and lands on the fixture support surface to complete the positioning.

[0003] For a cylinder fixture with an A-axis, if the top and bottom surfaces of the cylinder need to be processed, a cavity needs to be opened on the fixture body, and the tool is inserted into the cylinder body from the cavity for processing. The lifting pallet on the fixture body needs to avoid this cavity to avoid interference with the tool. The pallet mechanism on the fixture cannot slide on a continuous track. This brings a problem. Since the top surface of the cylinder body is two discontinuous small planes, the intermittent bottom surface of the cylinder body cannot slide on the intermittent track. Therefore, it is necessary to design a separate pallet lifting and pushing mechanism with a continuous track function. Summary of the invention

[0004] In view of the above problems, the present invention provides a hydraulic control system, which can realize the lifting and clamping of the workpiece and works reliably and stably.

[0005] According to the technical solution of the present invention: a hydraulic control system, characterized in that it includes a first side thrust cylinder, a second side thrust cylinder, a first lifting cylinder, and a second lifting cylinder;

[0006] The rod chamber of the first side thrust oil cylinder and the rod chamber of the second side thrust oil cylinder are connected to the oil outlet of the first one-way throttle valve through an oil pipe, the oil inlet of the first one-way throttle valve is connected to the hydraulically controlled one-way valve through an oil pipe, and the hydraulically controlled one-way valve is connected to the clamping oil port of the fixture;

[0007] The rodless chamber of the first side thrust oil cylinder and the rodless chamber of the second side thrust oil cylinder are connected to one end of the second one-way throttle valve through an oil pipe, the other end of the second one-way throttle valve is connected to one end of the fourth one-way sequence valve, the other end of the fourth one-way sequence valve is connected to one end of the third one-way sequence valve, and the other end of the third one-way sequence valve is connected to the clamp release oil port;

[0008] The oil pipe between the first one-way throttle valve and the hydraulic one-way valve is connected to one end of the first one-way sequence valve through a branch, the other end of the first one-way sequence valve is connected to one end of the second one-way sequence valve through the oil pipe, the oil pipe between the first one-way sequence valve and the second one-way sequence valve is connected to one end of the third one-way throttle valve through a branch, the other end of the third one-way throttle valve is connected to the rod chamber of the first lifting cylinder and the rod chamber of the second lifting cylinder, the rodless chamber of the first lifting cylinder and the rodless chamber of the second lifting cylinder are connected to one end of the fourth one-way throttle valve, and the other end of the fourth one-way throttle valve is connected to the connection between the third one-way sequence valve and the fourth one-way sequence valve;

[0009] The other end of the second one-way sequence valve is respectively connected to the rodless chamber of the first clamping cylinder, the rodless chamber of the second clamping cylinder, the rodless chamber of the third clamping cylinder, and the rodless chamber of the fourth clamping cylinder, and the rod chamber of the first clamping cylinder, the rod chamber of the second clamping cylinder, the rod chamber of the third clamping cylinder, and the rod chamber of the fourth clamping cylinder are respectively connected to the connection between the third one-way sequence valve and the clamp release oil port through oil pipes.

[0010] The product of the present invention also provides a split tray lifting and pushing mechanism, which is characterized by comprising a clamp body, a set of lifting guide components are respectively installed at the front and rear ends of the upper surface of the clamp body, and two feed guides arranged parallel to each other are installed at the feed end of the clamp body; after the lifting guide component is raised, the height is consistent with the height of the feed guide to support the workpiece;

[0011] A set of side push assemblies are respectively installed at the left and right ends of the upper surface of the clamp body to clamp the workpiece;

[0012] The lifting guide assembly and the side thrust assembly are controlled by the above-mentioned hydraulic control system to realize operation.

[0013] As a further improvement of the present invention, the lifting guide assembly includes a lifting cylinder, which is fixed on the clamping body, and lifting guide sleeves are symmetrically installed on both sides of the lifting cylinder. The piston rod of the lifting cylinder is fixedly connected to the guide bar mounting plate, and the bottom surface of the guide bar mounting plate is fixedly connected to two guide rods. The two guide rods are respectively guided and matched in the corresponding lifting guide sleeves, and support guide bars are respectively installed at both ends of the upper surface of the guide bar mounting plate.

[0014] As a further improvement of the present invention, the side thrust assembly includes a cylinder mounting seat, the cylinder mounting seat is mounted on the clamp body, the side thrust cylinder is mounted on the cylinder mounting seat, and the piston rod of the side thrust cylinder is fixedly connected to the side thrust guide strip;

[0015] The clamp body is symmetrically mounted with side-push guide seats on both sides corresponding to the oil cylinder mounting seat, and each of the side-push guide seats is respectively guided and matched with a side-push guide rod, and the side-push guide rod is fixedly connected with the side-push guide strip.

[0016] The technical effect of the present invention is that the product structure of the present invention is reasonable and ingenious. When working, the discontinuous bottom surface of the cylinder body can be smoothly pushed on the mechanism to realize the loading and unloading operation of the cylinder body, and the purpose of the cylinder body entering and leaving the positioning pin. After the workpiece is loaded, the tool processing space can be automatically avoided so that the tool can process the characteristics of the bottom surface of the cylinder body. The mechanism is an adaptive clamping mechanism. It can automatically adjust according to the difference in the shape of the workpiece to ensure reliable clamping of four points. The mechanism is simple and reliable, and easy to adjust and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the processing state when there is no workpiece in the present invention.

[0018] Figure 2 It is a schematic diagram of the processing state when there is a workpiece in the present invention.

[0019] Figure 3 This is a schematic diagram of the loading and unloading preparation state of the present invention.

[0020] Figure 4 It is a schematic diagram of the workpiece in place state of the present invention.

[0021] Figure 5 It is a structural schematic diagram of the lifting guide assembly in the present invention.

[0022] Figure 6 It is a schematic diagram of the structure of the thrust assembly in the present invention.

[0023] Figure 7 It is the hydraulic principle diagram of the hydraulic control system in the present invention.

[0024] Figure 8 This is a principle block diagram of the clamping process of the present invention.

[0025] Fig. 9 This is a principle block diagram of the loosening process of the present invention. DETAILED DESCRIPTION

[0026] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0027] Figures 1 to 9The invention comprises a clamp body 1, feed guides 2, 4, lifting guide assemblies 3, 6, a first lifting cylinder 3.1, lifting guide sleeves 3.3, 3.7, support guide strips 3.4, 3.6, guide rods 3.2, 3.8, guide strip mounting plate 3.5, a first side push cylinder 5.2, a second lifting cylinder 6.1, side push assemblies 5, 7, a cylinder mounting seat 7.1, a second side push cylinder 7.2, a side push guide strip 7.3, a side push guide seat 7.4, 7.7, a side push Guide rods 7.5, 7.6, clamp clamping oil port 8, hydraulically controlled one-way valve 9, first one-way throttle valve 10, second one-way throttle valve 11, first one-way sequence valve 12, third one-way throttle valve 13, fourth one-way throttle valve 14, second one-way sequence valve 15, first clamping cylinder 16, second clamping cylinder 17, third clamping cylinder 18, fourth clamping cylinder 19, third one-way sequence valve 20, fourth one-way sequence valve 21, clamp release oil port 22, etc.

[0028] like Figure 7 As shown, the present invention is a hydraulic control system, comprising a first side thrust cylinder 5.2, a second side thrust cylinder 7.2, a first lifting cylinder 3.1, and a second lifting cylinder 6.1.

[0029] The rod chamber of the first side thrust cylinder 5.2 and the rod chamber of the second side thrust cylinder 7.2 are connected to the oil outlet of the first one-way throttle valve 10 through an oil pipe, and the oil inlet of the first one-way throttle valve 10 is connected to the hydraulically controlled one-way valve 9 through an oil pipe, and the hydraulically controlled one-way valve 9 is connected to the clamping oil port 8 of the clamp.

[0030] The rodless chamber of the first side thrust cylinder 5.2 and the rodless chamber of the second side thrust cylinder 7.2 are connected to one end of the second one-way throttle valve 11 through an oil pipe, the other end of the second one-way throttle valve 11 is connected to one end of the fourth one-way sequence valve 21, the other end of the fourth one-way sequence valve 21 is connected to one end of the third one-way sequence valve 20, and the other end of the third one-way sequence valve 20 is connected to the clamp release oil port 22.

[0031] The oil pipe between the first one-way throttle valve 10 and the hydraulically controlled one-way valve 9 is connected to one end of the first one-way sequence valve 12 through a branch, the other end of the first one-way sequence valve 12 is connected to one end of the second one-way sequence valve 15 through the oil pipe, the oil pipe between the first one-way sequence valve 12 and the second one-way sequence valve 15 is connected to one end of the third one-way throttle valve 13 through a branch, the other end of the third one-way throttle valve 13 is connected to the rod chamber of the first lifting cylinder 3.1 and the rod chamber of the second lifting cylinder 6.1, the rodless chamber of the first lifting cylinder 3.1 and the rodless chamber of the second lifting cylinder 6.1 are connected to one end of the fourth one-way throttle valve 14, and the other end of the fourth one-way throttle valve 14 is connected to the connection between the third one-way sequence valve 20 and the fourth one-way sequence valve 21.

[0032] The other end of the second one-way sequence valve 15 is respectively connected to the rodless chamber of the first clamping cylinder 16, the rodless chamber of the second clamping cylinder 17, the rodless chamber of the third clamping cylinder 18, and the rodless chamber of the fourth clamping cylinder 19. The rod chamber of the first clamping cylinder 16, the rod chamber of the second clamping cylinder 17, the rod chamber of the third clamping cylinder 18, and the rod chamber of the fourth clamping cylinder 19 are respectively connected to the connection between the third one-way sequence valve 20 and the clamp release oil port 22 through oil pipes.

[0033] like Figure 8 As shown, the clamping cycle control sequence of the hydraulic control system during operation is as follows: the machine tool hydraulic station supplies oil to the clamping oil port 8 of the fixture, opens the hydraulically controlled one-way valve 9, and the oil flowing out of the hydraulically controlled one-way valve 9 is blocked by the main valve of the first one-way sequence valve 12, thereby opening the one-way valve of the first one-way throttle valve 10, entering the rod chamber of the first side thrust cylinder 5.2 and the rod chamber of the second side thrust cylinder 7.2, pushing the cylinder piston rod of the first side thrust cylinder 5.2 and the cylinder piston rod of the second side thrust cylinder 7.2 to retract.

[0034] The oil in the rodless chamber of the first side thrust cylinder 5.2 and the oil in the rodless chamber of the second side thrust cylinder 7.2 are throttled by the main valve of the second one-way throttle valve 11, and then pass through the one-way valve of the fourth one-way sequence valve 21 and the one-way valve of the third one-way sequence valve 20 in turn, and flow back to the reversing valve of the machine tool hydraulic station from the clamp release oil port 22, and finally flow back to the oil tank.

[0035] After the piston rod of the first side thrust cylinder 5.2 and the piston rod of the second side thrust cylinder 7.2 are retracted, the oil pressure rises to reach the pressure set by the first one-way sequence valve 12, opening the main valve of the first one-way sequence valve 12, and is blocked by the main valve of the second one-way sequence valve 15. The pressure oil opens the one-way valve of the third one-way throttle valve 13 and enters the rod chamber of the first lifting cylinder 3.1 and the rod chamber of the second lifting cylinder 6.1. The oil in the rodless chamber of the first lifting cylinder 3.1 and the oil in the rodless chamber of the second lifting cylinder 6.1 are throttled by the main valve of the fourth one-way throttle valve 14, and then pass through the one-way valve of the third one-way sequence valve 20, flow back to the reversing valve of the machine tool hydraulic station from the clamp release oil port 22, and finally flow back to the oil tank.

[0036] After the piston rod of the first lifting cylinder 3.1 and the piston rod of the second lifting cylinder 6.1 are retracted into place, the oil pressure rises and reaches the set pressure of the second one-way sequence valve 15, opening the main valve of the second one-way sequence valve 15 and entering the rodless chamber of the first clamping cylinder 16, the rodless chamber of the second clamping cylinder 17, the rodless chamber of the third clamping cylinder 18 and the rodless chamber of the fourth clamping cylinder 19. The piston rods of the first clamping cylinder 16, the second clamping cylinder 17, the third clamping cylinder 18 and the fourth clamping cylinder 19 extend outward under the action of the oil pressure, driving the pressure plates hinged to the piston rods of the first clamping cylinder 16, the second clamping cylinder 17, the third clamping cylinder 18 and the fourth clamping cylinder 19 to press against the cylinder body. The oil in the rodless chambers of the first clamping cylinder 16, the second clamping cylinder 17, the third clamping cylinder 18 and the fourth clamping cylinder 19 flows back to the reversing valve of the machine tool hydraulic station from the clamp release oil port 22, and finally flows back to the oil tank.

[0037] After the piston rods of the first clamping oil cylinder 16, the second clamping oil cylinder 17, the third clamping oil cylinder 18 and the fourth clamping oil cylinder 19 move to their proper positions, the oil pressure rises and reaches the system set pressure, the cylinder bodies are clamped, and the clamping cycle ends.

[0038] like Fig. 9 As shown, after the processing is completed, the reversing valve of the machine tool hydraulic station is switched again, and the machine tool hydraulic station supplies oil to the clamp release oil port 22, which is blocked by the main valve of the third one-way sequence valve 20 at the third one-way sequence valve 20, and the pressure oil enters the rod chambers of the first clamping oil cylinder 16, the second clamping oil cylinder 17, the third clamping oil cylinder 18, and the fourth clamping oil cylinder 19 and the control port of the hydraulic one-way valve 9, opening the main valve of the hydraulic one-way valve 9. The piston rods of the first clamping oil cylinder 16, the second clamping oil cylinder 17, the third clamping oil cylinder 18, and the fourth clamping oil cylinder 19 retract under the action of the pressure oil in the rod chamber. The oil in the rodless chambers of the first clamping cylinder 16, the second clamping cylinder 17, the third clamping cylinder 18 and the fourth clamping cylinder 19 successively passes through the one-way valve of the second one-way sequence valve 15 and the one-way valve of the first one-way sequence valve 12, flows back to the reversing valve of the machine tool hydraulic station from the clamp clamping oil port 8, and finally flows back to the oil tank.

[0039] After the piston rods of the first clamping oil cylinder 16, the second clamping oil cylinder 17, the third clamping oil cylinder 18, and the fourth clamping oil cylinder 19 are retracted, the oil pressure increases and reaches the set pressure of the first one-way sequence valve 12, opening the main valve of the third one-way sequence valve 20, and being blocked by the main valve of the fourth one-way sequence valve 21 at the fourth one-way sequence valve 21. The pressure oil opens the one-way valve of the fourth one-way throttle valve 14, enters the rodless chamber of the first lifting oil cylinder 3.1 of the front lifting guide assembly and the second lifting oil cylinder 6.1 of the rear lifting guide assembly, pushes the piston rods of the first lifting oil cylinder 3.1 and the second lifting oil cylinder 6.1 to extend upward, and drives the guide bars thereon to move upward. The oil in the rod chamber of the first lifting oil cylinder 3.1 and the second lifting oil cylinder 6.1 flows back to the reversing valve of the machine tool hydraulic station from the clamp clamping oil port 8 through the one-way valve of the first one-way sequence valve 12, and finally flows back to the oil tank.

[0040] The piston rods of the first lifting cylinder 3.1 and the second lifting cylinder 6.1 drive the guide bars thereon to push the cylinder body upward, and the cylinder body is separated from the positioning pin and the supporting surface of the fixture. After the piston rods of the first lifting cylinder 3.1 and the second lifting cylinder 6.1 extend upward to the position, the oil pressure increases and reaches the set pressure of the fourth one-way sequence valve 21, opens the main valve of the fourth one-way sequence valve 21, and enters the rodless cavity of the second side thrust cylinder 7.2 of the left translation assembly and the first side thrust cylinder 5.2 of the right translation assembly through the one-way valve of the second one-way throttle valve 11, pushing the piston rods of the second side thrust cylinder 7.2 of the left translation assembly and the first side thrust cylinder 5.2 of the right translation assembly to extend, and the piston rods of the second side thrust cylinder 7.2 and the first side thrust cylinder 5.2 drive the guide bars thereon to extend to the middle position of the fixture and insert into the bottom surface of the cylinder body. The oil in the rod chamber of the second side thrust cylinder 7.2 and the first side thrust cylinder 5.2 flows back to the reversing valve of the machine tool hydraulic station from the clamping oil port 8 after being throttled by the main valve of the first one-way throttle valve 10, and finally flows back to the oil tank. After the piston rods of the second side thrust cylinder 7.2 and the first side thrust cylinder 5.2 are extended to the right position, the oil pressure rises and reaches the system set pressure. The release cycle ends.

[0041] In the hydraulic principle diagram of this hydraulic control method, an accumulator and a pressure gauge can be set on the clamping main oil circuit according to actual conditions to suppress the pressure fluctuation of the hydraulic system during processing, and the pressure gauge can be used to display the real-time pressure of the system. A throttle valve can also be set on the clamping and loosening branches of the clamping cylinder to control the speed of the clamping cylinder when it is loosened. The number of clamping cylinders can be increased or decreased according to actual conditions.

[0042] like Figures 1 to 6As shown, the present invention is a split tray lifting and pushing mechanism, including a clamping body 1, a group of lifting guide components 3, 6 are respectively installed on the front and rear ends of the upper surface of the clamping body 1, and two feed guides 2, 4 arranged parallel to each other are installed on the feed end of the clamping body 1; after the lifting guide components 3, 6 are lifted, the height is consistent with the height of the feed guides 2, 4 to support the workpiece.

[0043] A set of side push assemblies 5, 7 are respectively installed at the left and right ends of the upper surface of the clamp body 1 to clamp the workpiece.

[0044] The lifting guide components 3, 6 and the side thrust components 5, 7 are controlled by the hydraulic control system described in claim 1 to realize operation.

[0045] The lifting guide assembly 3, 6 includes a first lifting cylinder 3.1, which is fixed on the clamping body 1. Lifting guide sleeves 3.3, 3.7 are symmetrically installed on both sides of the first lifting cylinder 3.1. The piston rod of the lifting cylinder 3.1 is fixedly connected to the guide bar mounting plate 3.5. The bottom surface of the guide bar mounting plate 3.5 is fixedly connected to two guide rods 3.2, 3.8. The two guide rods 3.2, 3.8 are respectively guided and matched in the corresponding lifting guide sleeves 3.3, 3.7. Support guide bars 3.4, 3.6 are respectively installed at both ends of the upper surface of the guide bar mounting plate 3.5.

[0046] The side thrust assembly 5, 7 comprises a cylinder mounting seat 7.1, the cylinder mounting seat 7.1 is mounted on the clamp body 1, the side thrust cylinder 7.2 is mounted on the cylinder mounting seat 7.1, and the piston rod of the side thrust cylinder 7.2 is fixedly connected to the side thrust guide strip 7.3.

[0047] Side push guide seats 7.4 and 7.7 are symmetrically installed on both sides of the clamp body 1 corresponding to the cylinder mounting seat 7.1. Each of the side push guide seats 7.4 and 7.7 is respectively guided and matched with a side push guide rod 7.5 and 7.6, and the side push guide rods 7.5 and 7.6 are fixedly connected to the side push guide strip 7.3.

[0048] like Figures 1 to 6 As shown, a hole is opened on the clamp body 1, and the feed guides 2, 4, the lifting guide components 3, 6, the side push components 5, 7, etc. are fixed on the clamp body 1. The feed guides 2, 4 are fixed to the front of the clamp body 1 and move with the clamp body 1. The heights of the feed guides 2, 4 are consistent. The oil cylinders of the lifting guide components 3, 6 are fixed to the clamp body 1. The oil cylinder piston rods on the lifting guide components 3, 6 are extended and retracted, driving the guide bars and other parts to move up and down. The oil cylinders of the side push components 5, 7 are fixed to the clamp body 1, and the oil cylinder piston rods of the side push components 5, 7 are extended and retracted, driving the guide bars and other parts to move horizontally.

[0049] The structures of the lifting guide components 3 and 6 are similar. Taking the front lifting guide component 3 as an example, the structures of the lifting guide components 3 and 6 are explained. The lifting guide component 3 is composed of a lifting cylinder 3.1, a guide bar mounting plate 3.5, supporting guide bars 3.4 and 3.6, lifting guide sleeves 3.3 and 3.7, guide rods 3.2 and 3.8 and other parts. The cylinder body of the lifting cylinder 3.1 is fixed on the clamp body 1. The lifting guide sleeves 3.3 and 3.7 are fixed in the holes of the clamp body 1. The guide rods 3.2, 3.8, guide bars 3.4 and 3.6 and other parts are fixed on the guide bar mounting plate 3.5 by screws, and the guide bar mounting plate 3.5 is connected to the piston rod of the lifting cylinder 3.1. The piston rod of the lifting cylinder 3.1 is raised and lowered, and under the guiding action of the lifting guide sleeves 3.3 and 3.7, the guide bar mounting plate 3.5 drives the guide bars 3.4 and 3.6 to move up and down.

[0050] Similarly, the oil cylinder of the rear lifting guide assembly 6 drives the guide bar thereon to perform lifting motion. The height of the guide bar after the front lifting guide assembly and the rear lifting guide assembly are raised is consistent with the height of the left front feed guide assembly 2 and the right front feed guide assembly 4, ensuring that the cylinder body can slide smoothly along the surface of the guide bar.

[0051] The structures of the side thrust assemblies 5 and 7 are similar. Taking the side thrust assembly 7 on the left side as an example, the structure of the translation guide assembly is explained. The side thrust assembly 7 is composed of a cylinder mounting seat 7.1, a second side thrust cylinder 7.2, a side thrust guide strip 7.3, a side thrust guide seat 7.4, 7.7, a side thrust guide rod 7.5, 7.6 and other parts. The cylinder mounting seat 7.1 is fixed to the clamp body 1 by screws. The guide seat 7.4 on the right and the guide seat 7.7 on the left are fixed to the clamp body 1 by screws. The side thrust guide strip 7.3, the side thrust guide rod 7.5, 7.6 are connected as a whole by screws and connected to the piston rod of the second side thrust cylinder 7.2. The piston rod of the second side thrust cylinder 7.2 is extended and retracted, driving the side thrust guide strip 7.3 and the side thrust guide rods 7.5, 7.6 to move horizontally under the guidance of the guide seat 7.4 on the right and the guide seat 7.7 on the left.

[0052] Similarly, the oil cylinder of the side thrust assembly 5 on the right side drives the guide bar thereon to move horizontally.

[0053] The height of the guide bars on the left side thrust assembly 7 and the right side thrust assembly 5 is basically the same as the height of the feed guides 2 and 4, but slightly lower, so that the guide bars on the left side thrust assembly 7 and the right side thrust assembly 5 can freely extend and retract at the bottom of the cylinder body without scratching the bottom surface of the cylinder body.

[0054] Before loading, the oil cylinder piston rods of the front lifting guide assembly 3 and the rear lifting guide assembly 6 are in an extended state, and the guide bars thereon are in a raised state, and the height is consistent with the height of the left front feed guide assembly 2 and the right front feed guide assembly 4. The oil cylinder piston rods of the left side push assembly 7 and the right side push assembly 5 are in an extended state. The guide bars of the left side push assembly 7 and the right side push assembly 5 are extended to the middle position of the clamp.

[0055] Manually push the cylinder body from the pushing mechanism onto the guide bar in the fixture and push the material into place.

[0056] After the cylinder body enters the fixture and is in place, the fixture is supplied with oil, and the cylinder piston rods of the side thrust assembly 7 on the left side and the side thrust assembly 5 on the right side of the fixture are retracted, driving the guide bars thereon to withdraw from the bottom surface area of ​​the cylinder body. After the cylinder piston rods of the side thrust assembly 7 on the left side and the side thrust assembly 5 on the right side are retracted, the cylinder piston rods of the front lifting guide assembly 3 and the rear lifting guide assembly 6 are retracted, and the cylinder body moves downward under the action of its own weight, inserts into the positioning pin of the fixture, and lands on the support surface of the fixture to complete the positioning. After the positioning is completed, the clamping cylinder is activated to clamp the workpiece. The positioning and clamping of the cylinder body are completed. The machine tool starts to process the workpiece. At this time, the cylinder piston rods of the side thrust assembly 7 on the left side and the side thrust assembly 5 on the right side are in a retracted state, and the guide bars thereon are away from the bottom surface area of ​​the cylinder body. When it is necessary to process the features of the bottom surface of the cylinder body, the A axis of the machine tool rotates, driving the fixture to rotate, and the features of the bottom surface of the cylinder body are facing the main shaft of the machine tool. The tool passes through the cavity of the fixture body 1 to process the features of the bottom surface of the cylinder body.

[0057] After the processing is completed, the A axis of the machine tool rotates back to the initial position for loading. The fixture switches the oil supply, and the clamping cylinder is released. After the clamping cylinder is released in place, the cylinder piston rods of the front lifting guide assembly 3 and the rear lifting guide assembly 6 extend, and the guide bars of the front lifting guide assembly 3 and the rear lifting guide assembly 6 drive the cylinder body to move upward, and the bottom surface of the cylinder body is separated from the positioning pin of the fixture. After the cylinder piston rods of the front lifting guide assembly 3 and the rear lifting guide assembly 6 extend in place, the cylinder piston rods of the left side thrust assembly 7 and the right side thrust assembly 5 extend. The oil cylinders of the left side thrust assembly 7 and the right side thrust assembly 5 drive the guide bars on them to extend to the middle position of the fixture. Enter under the bottom surface of the cylinder body.

[0058] Then, the machined cylinder body is manually pulled out from the inside of the fixture along the guide bar on the fixture. Unloading is completed. After that, the machined cylinder body is manually pushed from the pusher mechanism to the guide bar of the fixture. Loading is completed.

[0059] like Figure 8 , 9As shown in the figure, for the fixture that provides multiple hydraulic oils on the machine tool worktable, the hydraulic control design of the fixture is relatively simple. According to the above action sequence, each action is controlled separately. After the cylinder action is completed, the pressure relay in the oil circuit sends a signal, and the machine tool control system sends the next action command after receiving this signal. And so on, until all actions are completed.

[0060] like Figure 8 As shown in the figure, the control method of the clamps that provide multiple hydraulic oils for the machine tool worktable is as follows: after the material is loaded, the machine tool door is closed; the clamping cycle starts: the oil cylinder piston rods of the left side thrust assembly and the right side thrust assembly retract; after retracting to the position, the oil cylinder piston rods of the left side thrust assembly and the right side thrust assembly retract the branch pressure relay to detect the branch pressure and send a signal. If the relay does not send a signal within a certain period of time, the machine tool sends an alarm signal for the oil cylinder retraction of the translation group.

[0061] After the pressure relay of the oil cylinder piston rod retraction branch of the left side thrust assembly and the right side thrust assembly detects the signal, the lifting oil cylinder piston rod of the front lifting guide assembly and the rear lifting guide assembly retracts. After retracting to the position, the pressure relay of the lifting oil cylinder piston rod branch of the front lifting guide assembly and the rear lifting guide assembly detects the branch pressure and sends a signal. If the relay does not send a signal within a certain period of time, the machine tool sends an alarm signal for the oil cylinder of the lifting guide assembly to descend.

[0062] After the pressure relays of the lifting cylinder piston rod branch of the front lifting guide assembly and the rear lifting guide assembly send a signal, the clamping cylinder piston rod extends, and the pressure plate connected to the piston rod presses the workpiece. The clamping cylinder clamping branch pressure relay detects the branch pressure and sends a signal. If the relay does not send a signal within a certain period of time, the machine tool sends a clamping cylinder clamping alarm signal. After the clamping cylinder clamping branch pressure relay sends a signal, the machine tool starts processing.

[0063] like Fig. 9As shown, the cycle after the processing is completed is as follows: After the processing is completed, the loosening cycle begins: the piston rods of the first clamping oil cylinder 16, the second clamping oil cylinder 17, the third clamping oil cylinder 18, and the fourth clamping oil cylinder 19 retract, driving the pressure plate to loosen the workpiece. The first clamping oil cylinder 16, the second clamping oil cylinder 17, the third clamping oil cylinder 18, and the fourth clamping oil cylinder 19 release the branch pressure relay to detect the branch pressure and send a signal. If the relay does not send a signal within a certain period of time, the machine tool will send a clamping oil cylinder loosening alarm signal. After the first clamping oil cylinder 16, the second clamping oil cylinder 17, the third clamping oil cylinder 18, and the fourth clamping oil cylinder 19 release the branch pressure relay to send a signal, the lifting oil cylinder piston rods of the front lifting guide assembly 3 and the rear lifting guide assembly 5 extend. The lifting oil cylinder piston rods of the front lifting guide assembly 3 and the rear lifting guide assembly 5 extend the branch pressure relay to detect the branch pressure and send a signal. If the relay does not send a signal within a certain period of time, the machine tool will send a lifting guide assembly cylinder lifting alarm signal. After the branch pressure relay of the lifting oil cylinder piston rod of the front lifting guide assembly 3 and the rear lifting guide assembly 5 extends, the oil cylinder piston rod of the left side thrust assembly 7 and the right side thrust assembly 5 extends. After extending to the right position, the branch pressure relay of the oil cylinder piston rod of the left side thrust assembly 7 and the right side thrust assembly 5 detects the branch pressure and sends a signal. If the relay does not send a signal within a certain period of time, the machine tool sends an alarm signal that the translation assembly oil cylinder extends. After the branch pressure relay of the oil cylinder piston rod of the left side thrust assembly 7 and the right side thrust assembly 5 extends, the machine tool door opens. The release cycle ends.

Claims

1. A hydraulic control system, characterized in that: It comprises a first side thrust cylinder (5.2), a second side thrust cylinder (7.2), a first lifting cylinder (3.1), and a second lifting cylinder (6.1); The rod chamber of the first side thrust cylinder (5.2) and the rod chamber of the second side thrust cylinder (7.2) are connected to the oil outlet of the first one-way throttle valve (10) through an oil pipe, the oil inlet of the first one-way throttle valve (10) is connected to the hydraulically controlled one-way valve (9) through an oil pipe, and the hydraulically controlled one-way valve (9) is connected to the clamping oil port (8) of the fixture; The rodless chamber of the first side thrust oil cylinder (5.2) and the rodless chamber of the second side thrust oil cylinder (7.2) are connected to one end of the second one-way throttle valve (11) through an oil pipe, the other end of the second one-way throttle valve (11) is connected to one end of a fourth one-way sequence valve (21), the other end of the fourth one-way sequence valve (21) is connected to one end of a third one-way sequence valve (20), and the other end of the third one-way sequence valve (20) is connected to a clamp release oil port (22); The oil pipe between the first one-way throttle valve (10) and the hydraulic one-way valve (9) is connected to one end of the first one-way sequence valve (12) through a branch, the other end of the first one-way sequence valve (12) is connected to one end of the second one-way sequence valve (15) through the oil pipe, the oil pipe between the first one-way sequence valve (12) and the second one-way sequence valve (15) is connected to one end of the third one-way throttle valve (13) through a branch, the other end of the third one-way throttle valve (13) is connected to the rod chamber of the first lifting cylinder (3.1) and the rod chamber of the second lifting cylinder (6.1), the rodless chamber of the first lifting cylinder (3.1) and the rodless chamber of the second lifting cylinder (6.1) are connected to one end of the fourth one-way throttle valve (14), and the other end of the fourth one-way throttle valve (14) is connected to the connection between the third one-way sequence valve (20) and the fourth one-way sequence valve (21); The other end of the second one-way sequence valve (15) is respectively connected to the rodless chamber of the first clamping cylinder (16), the rodless chamber of the second clamping cylinder (17), the rodless chamber of the third clamping cylinder (18), and the rodless chamber of the fourth clamping cylinder (19); the rod chamber of the first clamping cylinder (16), the rod chamber of the second clamping cylinder (17), the rod chamber of the third clamping cylinder (18), and the rod chamber of the fourth clamping cylinder (19) are respectively connected to the connection between the third one-way sequence valve (20) and the clamp release oil port (22) through oil pipes.

2. A split tray lifting and pushing mechanism, characterized in that: It comprises a clamp body (1), wherein a set of lifting guide components (3, 6) are respectively installed at the front and rear ends of the upper surface of the clamp body (1), and two mutually parallel feeding guide members (2, 4) are installed at the feeding end of the clamp body (1); after the lifting guide components (3, 6) are lifted, their height is consistent with that of the feeding guide members (2, 4) to support the workpiece; A set of side push assemblies (5, 7) are respectively installed at the left and right ends of the upper surface of the clamp body (1) to clamp the workpiece; The lifting guide assembly (3, 6) and the side thrust assembly (5, 7) are controlled by the hydraulic control system described in claim 1 to realize operation.

3. The split tray lifting and pushing mechanism according to claim 2, characterized in that: The lifting guide assembly (3, 6) comprises a lifting cylinder (3.1), the lifting cylinder (3.1) is fixed on the clamping body (1), lifting guide sleeves (3.3, 3.7) are symmetrically installed on both sides of the lifting cylinder (3.1), the piston rod of the lifting cylinder (3.1) is fixedly connected to the guide bar mounting plate (3.5), the bottom surface of the guide bar mounting plate (3.5) is fixedly connected to two guide rods (3.2, 3.8), the two guide rods (3.2, 3.8) are respectively guided and matched in the corresponding lifting guide sleeves (3.3, 3.7), and the support guide bars (3.4, 3.6) are respectively installed at both ends of the upper surface of the guide bar mounting plate (3.5).

4. The split tray lifting and pushing mechanism according to claim 2, characterized in that: The side thrust assembly (5, 7) comprises a cylinder mounting seat (7.1), the cylinder mounting seat (7.1) is mounted on the clamp body (1), the side thrust cylinder (7.2) is mounted on the cylinder mounting seat (7.1), and the piston rod of the side thrust cylinder (7.2) is fixedly connected to the side thrust guide strip (7.3); Side push guide seats (7.4, 7.7) are symmetrically mounted on the clamp body (1) on both sides corresponding to the oil cylinder mounting seat (7.1); each of the side push guide seats (7.4, 7.7) is respectively provided with a side push guide rod (7.5, 7.6) for guiding and cooperating; the side push guide rod (7.5, 7.6) is fixedly connected to the side push guide strip (7.3).

Images