Programmable control hydraulic clamp
By adopting programmable controllable oil and gas circuit combinations and gas detection devices in hydraulic fixtures, the problems of complex design and high replacement cost of hydraulic fixtures are solved, and the digital control and flexibility of hydraulic fixtures are realized, reducing costs and risks , ensuring the stability of the processing process.
Patent Information
- Application Number
- CN202420933262.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-04-30
AI Technical Summary
The existing hydraulic fixtures are complex in design, resulting in high failure risk and high cost. Each product needs to be redesigned, which is time-consuming and costly.
The hydraulic clamp design is adopted with programmable control, through the combination of oil and gas circuits, the workpiece positioning and clamping is achieved by using linear push cylinders and lever cylinders, and the clamp design is ensured in place with the gas detection device, and the clamp design is simplified by the programming control system and Manufacturing process.
The digital and intelligent control of hydraulic fixtures is realized, which reduces the design complexity and cost, increases equipment flexibility, reduces the cost and space requirements of newly invested equipment, and ensures the stability and competitiveness of the processing process.
Smart Images
Figure CN222315512U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of mechanical processing and process equipment, and relates to a programmable controlled hydraulic clamp. Background Art
[0002] Each product has a unique design and different products have different clamping and positioning requirements.
[0003] In order to realize the control of hydraulic clamps to complete the clamping action, clamping sequence, appropriate pressure and other controls that meet the product requirements; usually a large number of hydraulic valves including sequence valves, pressure reducing valves, hydraulically controlled check valves, etc. are used to achieve control.
[0004] Hydraulic clamps use too many hydraulic control valves, resulting in complex structures, high failure risks and high costs. In particular, the design of hydraulic clamps using a large number of hydraulic valves can only be targeted at specific products; every time a product is changed, the hydraulic clamp needs to be redesigned. For enterprises, large enterprises have hundreds of product varieties and hundreds of hydraulic clamps. Changeover is time-consuming and costly. Summary of the invention
[0005] The utility model discloses a programmable controlled hydraulic clamp to solve the problems in the prior art that each time a product is changed, the hydraulic clamp needs to be redesigned, the change of model is time-consuming and costly, and the like.
[0006] The utility model includes a machining center liquid control system, a hydraulic clamp actuator, and a hydraulic clamp body; the machining center liquid control system is connected to the hydraulic clamp actuator for driving control; the hydraulic clamp actuator includes an oil circuit, a linear push cylinder, and a lever cylinder; the lever cylinder is a general term in this field, which is different from the linear cylinder, and its force transmission is applied in the 90° direction; the number of hydraulically clamped workpieces is greater than or equal to 1; a linear cylinder and a lever cylinder are arranged at each workpiece installation location; the linear push cylinder and the lever cylinder arranged at each workpiece installation location form a clamp unit; the linear cylinder and the lever cylinder are both double-acting cylinders, respectively including an oil inlet chamber and an oil return chamber; the oil circuit includes a clamping oil circuit and a loosening oil circuit; the linear push cylinder and the lever cylinder are connected to the clamping oil circuit on one side and the loosening oil circuit on the other side; the clamping oil circuit is connected to the oil inlet chamber; when the oil inlet chamber is supplied with oil, the workpiece is clamped; the loosening oil circuit is connected to the oil return chamber, and when the oil return chamber is supplied with oil, the workpiece is loosened.
[0007] In the utility model, each workpiece installation location is provided with a first linear push cylinder, a second linear push cylinder, a third linear push cylinder and a lever oil cylinder; the clamping oil circuit comprises a first clamping oil circuit, a second clamping oil circuit, a third clamping oil circuit and a fourth clamping oil circuit; the loosening oil circuit comprises a first loosening oil circuit and a second loosening oil circuit.
[0008] The first clamping oil circuit is connected to the oil inlet chamber of the second linear push cylinder. When the first clamping oil circuit supplies oil to the second linear push cylinder, the left side of the workpiece is positioned; at this time, a smaller pressure is provided to lightly press the workpiece to achieve pre-positioning.
[0009] The second clamping oil circuit is connected to the oil inlet chamber of the lever cylinder. When the second clamping oil circuit supplies oil to the lever cylinder, the right side of the workpiece is positioned;
[0010] The third clamping oil circuit is connected to the second linear push cylinder oil inlet chamber and the third linear push cylinder oil inlet chamber in parallel. The third clamping oil circuit provides high pressure. When oil is supplied to the linear push cylinder and the linear push cylinder at the same time, the final clamping of the workpiece is achieved.
[0011] The fourth clamping oil circuit is connected to the oil inlet chamber of the first linear oil cylinder, and when the fourth clamping oil circuit supplies oil to the first linear oil cylinder, auxiliary clamping of the workpiece is achieved;
[0012] The first loosening oil circuit and the second loosening oil circuit are connected to the return oil chambers of the first linear push cylinder, the second linear push cylinder, the third linear push cylinder and the lever cylinder; when the first loosening oil circuit and the second loosening oil circuit are supplied with oil, the workpiece is loosened on the fixture.
[0013] An optimization solution also includes an air circuit and a chuck; the chuck is connected in parallel to the air circuit; a chuck is also arranged at each workpiece installation location; the chuck, linear push cylinder and lever cylinder at each workpiece form a fixture unit; the pneumatic chuck assists in clamping the workpiece.
[0014] An optimization scheme also includes a gas detection device, which is installed in the chuck; the gas circuit supplies gas, and the machine tool detects the pressure value in the circuit. If the pressure reaches the set value, it is determined that the workpiece is clamped in place. Otherwise, it is determined that the workpiece is not clamped in place, and the workpiece needs to be reloaded on the fixture.
[0015] The hydraulic control system of the machining center described in the utility model comprises a hydraulic power station, a control block with a hydraulic valve and a pressure switch; pressure measuring ports are provided on the first clamping oil circuit, the second clamping oil circuit, the third clamping oil circuit, the fourth clamping oil circuit, the first loosening oil circuit and the second loosening oil circuit; and a check valve and a throttle valve are respectively installed and connected on the oil circuits in front of the pressure measuring ports.
[0016] An optimization scheme, workpiece G1, workpiece G2, workpiece G3, workpiece G4 are processed simultaneously; each workpiece installation is arranged with a chuck, a first linear push cylinder, a second linear push cylinder, a third linear push cylinder and a lever oil cylinder; the chuck, the first linear push cylinder, the second linear push cylinder, the third linear push cylinder and the lever oil cylinder at each workpiece form a fixture unit; there are two air circuits, including a first air circuit and a second air circuit; the chucks of workpieces G1 and G3 are connected in parallel to the first air circuit; the chucks of workpieces G2 and G4 are connected in parallel to the second air circuit; when the first air circuit and the second air circuit supply air to the chuck, test whether the workpiece completes the clamping action. If the detected gas pressure is insufficient, it is determined that it is not clamped; the first loosening oil circuit is connected to the linear push cylinders of the two workpieces on the left side of the fixture and the return oil chamber of the lever oil cylinder, and the first loosening oil circuit supplies oil to the return oil chamber of the linear push cylinders and the lever oil cylinder of the two workpieces on the left side of the fixture to loosen the left workpiece. The second loosening oil circuit is connected to the linear push cylinders and the return oil chamber of the lever cylinder of the two workpieces on the right side of the fixture. The second loosening oil circuit supplies oil to the linear push cylinders and the return oil chamber of the lever cylinder of the two workpieces on the right side of the fixture to loosen the workpiece on the right side.
[0017] The utility model can use a system with programming control to realize the working process of complex hydraulic clamps, so as to simplify the design and manufacturing process of the clamps. The positioning and clamping of the workpiece are completed by programming and controlling the time sequence of oil inlet into the clamping oil circuit, so as to ensure the stability of the workpiece manufacturing process.
[0018] The working process is as follows:
[0019] In the first step, the first clamping oil circuit supplies oil to the oil inlet chamber of the second linear push cylinder to start positioning the left side of the workpiece;
[0020] In the second step, the second clamping oil circuit supplies oil to the lever cylinder to position the right side of the workpiece;
[0021] In the third step, the third clamping oil circuit supplies oil to the oil inlet chambers of the second linear push cylinder and the third linear push cylinder at the same time to achieve clamping of the workpiece;
[0022] Step 4: The fourth clamping oil circuit supplies oil to the oil inlet chamber of the first linear oil cylinder to assist in clamping the workpiece;
[0023] Step 5: Supply air through the first and second air paths to test whether the workpiece has completed the clamping action;
[0024] In the sixth step, the first loosening oil circuit and the second loosening oil circuit are connected to the first linear push cylinder, the second linear push cylinder, the third linear push cylinder and the oil return chamber of the lever cylinder to complete the loosening action of the workpiece on the fixture.
[0025] The parameter-programmed program gives instructions to the machine tool hydraulic system, supplies oil along the oil circuit to the first linear push cylinder, the second linear push cylinder, the third linear push cylinder and the lever cylinder, and clamps the workpiece according to the time, sequence and pressure designed by the program; the sequence of clamping the workpiece, the speed of time and the size of pressure are controlled to complete the processing.
[0026] The positive effects of the utility model are: the working sequence, pressure, time, etc. of the hydraulic clamp can be programmably controlled, a breakthrough is found in program control, and hydraulic control can be digitalized and intelligentized. It avoids the high risk of failure and high cost caused by the complex design of the hydraulic clamp due to the excessive use of hydraulic control valves in the past; it increases the flexibility of the equipment and saves the cost and space of new equipment. It provides overall competitiveness. The process is controllable and a complex mechanical processing process is realized. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 This is a schematic diagram of the hydraulic structure of the utility model;
[0028] In the figure: L1 first air circuit, L2 second air circuit, H1 clamping oil circuit, H2 clamping oil circuit, H3 clamping oil circuit, H4 clamping oil circuit, H5 release oil circuit, H6 release oil circuit, J1 chuck, J2 linear push cylinder, J3 linear push cylinder, J4 linear push cylinder, J5 lever cylinder, 1 throttle valve, 2 check valves, 3 pressure measuring ports, G1 workpiece, G2 workpiece, G3 workpiece, G4 workpiece. DETAILED DESCRIPTION
[0029] An embodiment of the present utility model is described in detail below with reference to the accompanying drawings.
[0030] In the embodiment of the present invention, four workpieces, workpiece G1, workpiece G2, workpiece G3, and workpiece G4 are to be processed simultaneously.
[0031] like Figure 1 As shown, the utility model includes a machining center liquid control system, a hydraulic clamp actuator, and a hydraulic clamp body; the machining center liquid control system is drive-controlled and connected to the hydraulic clamp actuator; the hydraulic clamp actuator includes an oil circuit, an air circuit, a chuck J1, a gas detection device, a linear push cylinder, and a lever cylinder; a chuck J1, a first linear push cylinder J2, a second linear push cylinder J3, a third linear push cylinder J4, and a lever cylinder J5 are arranged at each workpiece installation location; the head J1, the linear push cylinder J2, the linear push cylinder J3, the linear push cylinder J4, and the lever cylinder J5 at each workpiece constitute a fixture unit; the gas detection device is installed in the chuck J1, and the chuck J1 is connected in parallel to the air circuit.
[0032] The oil circuit includes a clamping oil circuit and a loosening oil circuit; the linear cylinder and the lever cylinder are double-acting cylinders, respectively including an oil inlet chamber and an oil return chamber; the linear push cylinder and the lever cylinder are connected to the clamping oil circuit on one side and connected to the loosening oil circuit on the other side; the clamping oil circuit is connected to the oil inlet chamber; when the oil inlet chamber is supplied with oil, the workpiece is clamped; the loosening oil circuit is connected to the oil return chamber, and when the oil return chamber is supplied with oil, the workpiece is loosened.
[0033] like Figure 1 As shown, the clamping oil circuit includes a first clamping oil circuit H1, a second clamping oil circuit H2, a third clamping oil circuit H3, and a fourth clamping oil circuit H4; the loosening oil circuit includes a first loosening oil circuit H5 and a second loosening oil circuit H6.
[0034] The first clamping oil circuit H1 is connected to the oil inlet chamber of the linear push cylinder J3. When the first clamping oil circuit H1 supplies oil to the linear push cylinder J3, the left side of the workpiece is positioned; at this time, a smaller pressure is provided to lightly press the workpiece to achieve pre-positioning.
[0035] The second clamping oil circuit H2 is connected to the oil inlet chamber of the lever cylinder J5. When the second clamping oil circuit H2 supplies oil to the lever cylinder J5, the right side of the workpiece is positioned;
[0036] The third clamping oil circuit H3 is connected to the oil inlet chamber of the linear push cylinder J3 and the oil inlet chamber of the linear push cylinder J4 in parallel. The third clamping oil circuit H3 provides high pressure. When oil is supplied to the linear push cylinder J3 and the linear push cylinder J4 at the same time, the final clamping of the workpiece is achieved.
[0037] The fourth clamping oil circuit H4 is connected to the oil inlet chamber of the linear oil cylinder J2. When the fourth clamping oil circuit H4 supplies oil to the linear oil cylinder J2, auxiliary clamping of the workpiece is achieved.
[0038] The first loosening oil circuit H5 and the second loosening oil circuit H6 are connected to the return oil chambers of the linear push cylinder J2, the linear push cylinder J3, the linear push cylinder J4 and the lever cylinder J5; when the first loosening oil circuit H5 and the second loosening oil circuit H6 are supplied with oil, the workpiece is loosened on the fixture.
[0039] The hydraulic control system of the machining center described in the utility model comprises a hydraulic power station, a control block with a hydraulic valve and a pressure switch; a pressure measuring port 3 is provided on the clamping oil circuit H1, the clamping oil circuit H2, the clamping oil circuit H3, the clamping oil circuit H4, the loosening oil circuit H5, and the loosening oil circuit H6; a check valve 2 and a throttle valve 1 are respectively installed and connected on the oil circuit in front of the pressure measuring port 3.
[0040] There are two gas circuits, including a first gas circuit L1 and a second gas circuit L2; the chucks J1 of the workpieces G1 and G3 are connected in parallel to the first gas circuit L1; the chucks J1 of the workpieces G2 and G4 are connected in parallel to the second gas circuit L2; when the first gas circuit L1 and the second gas circuit L2 supply gas to the chuck J1, the pneumatic chuck J1 assists in clamping the workpiece; the machine tool detects the pressure value in the loop to test whether the workpiece has completed the clamping action; when the set value is reached, it is determined that the workpiece is clamped in place; if the detected gas pressure is insufficient, it is determined that the workpiece is not clamped in place, and the workpiece needs to be reloaded on the fixture.
[0041] The first loosening oil circuit H5 is connected to the linear push cylinders of the two workpieces on the left side of the fixture and the oil return chamber of the lever cylinder. The first loosening oil circuit H5 supplies oil to the linear push cylinders of the two workpieces on the left side of the fixture and the oil return chamber of the lever cylinder to loosen the left workpiece. The second loosening oil circuit H6 is connected to the linear push cylinders of the two workpieces on the right side of the fixture and the oil return chamber of the lever cylinder. The second loosening oil circuit H6 supplies oil to the linear push cylinders of the two workpieces on the right side of the fixture and the oil return chamber of the lever cylinder to loosen the right workpiece.
[0042] The utility model can use a system with programming control to realize the working process of complex hydraulic clamps, so as to simplify the design and manufacturing process of the clamps. The positioning and clamping of the workpiece are completed by programming and controlling the time sequence of oil inlet into the clamping oil circuit, so as to ensure the stability of the workpiece manufacturing process.
[0043] The working process is as follows:
[0044] In the first step, the first clamping oil circuit H1 supplies oil to the oil inlet chamber of the linear push cylinder J3 to start positioning the left side of the workpiece;
[0045] In the second step, the second clamping oil circuit H2 supplies oil to the lever cylinder J5 to position the right side of the workpiece;
[0046] In the third step, the third clamping oil circuit H3 supplies oil to the oil inlet chamber of the linear push cylinder J3 and the linear push cylinder J4 at the same time to achieve the clamping of the workpiece;
[0047] Step 4: The fourth clamping oil circuit H4 supplies oil to the oil inlet chamber of the linear oil cylinder J2 to assist in clamping the workpiece;
[0048] Step 5: Supply air through the first air path L1 and the second air path L2 to test whether the workpiece has completed the clamping action;
[0049] Step 6: The first loosening oil circuit H5 and the second loosening oil circuit H6 are connected to the oil return chamber of the linear push cylinder J2, the linear push cylinder J3, the linear push cylinder J4 and the lever cylinder J5 to complete the loosening action of the workpiece on the fixture.
[0050] The machine tool hydraulic system is instructed through a parameter-programmed program to supply oil along the oil circuit to the linear push cylinder J2, linear push cylinder J3, linear push cylinder J4 and lever cylinder J5 to clamp the workpiece according to the time, sequence and pressure designed by the program; the sequence, time and pressure of clamping the workpiece are controlled to complete the processing.
[0051] Through programmable control in the control system of the machining center, the pressure, sequence, duration and other action control of the hydraulic clamp during the working process can be realized. This can simplify the complex hydraulic clamp, reduce the manufacturing cost of the hydraulic clamp, and stabilize the product processing process.
[0052] The present invention is not limited to the above-mentioned implementation method of parameter programming of hydraulic clamps. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any technical solution that is the same or similar to the present invention is within the scope of protection.
Claims
1. A programmable controlled hydraulic fixture, comprising a machining center liquid control system, a hydraulic fixture actuator, and a hydraulic fixture body; the machining center liquid control system is connected to the hydraulic fixture actuator for driving control; characterized in that: The hydraulic fixture actuator includes an oil circuit, a linear push cylinder, and a lever cylinder; The number of hydraulically clamped workpieces is greater than or equal to 1; A first linear push cylinder (J2), a second linear push cylinder (J3), a third linear push cylinder (J4) and a lever cylinder (J5) are arranged at each workpiece installation location; the linear push cylinders and the lever cylinders arranged at each workpiece installation location form a fixture unit; the linear cylinders and the lever cylinders respectively include an oil inlet chamber and an oil return chamber; The oil circuit includes a clamping oil circuit and a loosening oil circuit; The clamping oil circuit includes a first clamping oil circuit (H1), a second clamping oil circuit (H2), a third clamping oil circuit (H3), and a fourth clamping oil circuit (H4); The first clamping oil circuit (H1) is connected to the oil inlet chamber of the second linear push cylinder (J3); The second clamping oil circuit (H2) is connected to the oil inlet chamber of the lever oil cylinder (J5); The third clamping oil circuit (H3) is connected in parallel with the oil inlet chamber of the second linear push cylinder (J3) and the oil inlet chamber of the third linear push cylinder (J4); The fourth clamping oil circuit (H4) is connected to the oil inlet chamber of the first linear push cylinder (J2); The loosening oil circuit includes a first loosening oil circuit (H5) and a second loosening oil circuit (H6); The first release oil circuit (H5) and the second release oil circuit (H6) are connected to the return oil chambers of the first linear push cylinder (J2), the second linear push cylinder (J3), the third linear push cylinder (J4) and the lever oil cylinder (J5).
2. A programmable hydraulic clamp according to claim 1, characterized in that: It also includes an air circuit and a chuck; the chuck is connected in parallel to the air circuit; a chuck is also arranged at each workpiece installation location; the chuck, linear push cylinder and lever cylinder at each workpiece form a fixture unit.
3. A programmable hydraulic clamp according to claim 1, characterized in that: Also included is a gas detection device, which is installed in the chuck.
4. A programmable hydraulic clamp according to claim 1, characterized in that: The hydraulic control system of the machining center includes a hydraulic power station, a control block with a hydraulic valve and a pressure switch; the first clamping oil circuit, the second clamping oil circuit, the third clamping oil circuit, the fourth clamping oil circuit, the first release oil circuit, and the second release oil circuit are provided with pressure measuring ports; the oil circuits in front of the pressure measuring ports are respectively connected with a check valve and a throttle valve.
5. A programmable hydraulic clamp according to claim 1, characterized in that: Four workpieces are processed simultaneously; a chuck, a first linear push cylinder (J2), a second linear push cylinder (J3), a third linear push cylinder (J4) and a lever cylinder (J5) are arranged at each workpiece installation location; the chuck, the first linear push cylinder (J2), the second linear push cylinder (J3), the third linear push cylinder (J4) and the lever cylinder (J5) at each workpiece form a fixture unit; there are two air circuits, including a first air circuit and a second air circuit; the chucks of the two workpieces are connected in parallel to the first air circuit; the chucks of the other two workpieces are connected in parallel to the second air circuit; the first loosening oil circuit (H5) is connected to the oil return chambers of the linear push cylinders and the lever cylinders of the two workpieces on the left side of the fixture; the second loosening oil circuit is connected to the oil return chambers of the linear push cylinders and the lever cylinders of the two workpieces on the right side of the fixture.