Workpiece positioning clamp for machine tool machining

Abstract

The utility model relates to the technical field of machine tool machining, and discloses a machine tool machining workpiece positioning clamp which comprises an installation base, a hydraulic bin, a piston assembly and a hydraulic assembly, a clamping head is driven through a plurality of sets of hydraulic devices which are connected in parallel, and therefore clamping force between workpieces between different clamping points and clamping force between the clamping head are the same, and the clamping effect is good. Therefore, multi-point stable clamping of workpieces in different shapes is achieved, the clamping distance of the clamping head can be adjusted in a self-adaptive mode according to the shapes of the workpieces, and the stability of equipment is improved.

Description

Technical Field

[0001] This utility model relates to the field of machine tool processing technology, specifically a workpiece positioning fixture for machine tool processing. Background Technology

[0002] In mechanical manufacturing, a device used to fix a workpiece in the correct machining position for processing or inspection is called a fixture. Broadly speaking, any device used to quickly, conveniently, and safely mount a workpiece at any stage of the manufacturing process can be called a fixture. Examples include machining fixtures, inspection fixtures, assembly fixtures, and machine tool fixtures, with machine tool fixtures being the most common and often simply referred to as fixtures. When machining a workpiece on a machine tool, to ensure that the workpiece surface meets the technical requirements specified in the drawing, such as dimensions, geometry, and positional accuracy relative to other surfaces, the workpiece must be positioned and clamped before machining.

[0003] In machining processes, vises and bench vises are commonly used to fix the parts being machined. However, vises and bench vises are slow, inefficient, and not very secure, and they are not very suitable for clamping workpieces of different shapes. Utility Model Content

[0004] The purpose of this utility model is to provide a workpiece positioning fixture for machine tool processing, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A workpiece positioning fixture for machine tool processing includes a mounting base, a hydraulic chamber, a piston assembly, and a hydraulic assembly;

[0007] The hydraulic chamber is mounted on a mounting base, and a placement platform is fixedly connected to the mounting base. Multiple sets of circumferentially distributed partitions are fixedly connected inside the hydraulic chamber, and hydraulic grooves are provided between the partitions. Multiple sets of circumferentially distributed connecting pipes are provided on the outer wall of the hydraulic chamber, and oil supply pipes are fixedly connected to the multiple sets of connecting pipes. The oil supply pipes are synchronously connected to the multiple sets of hydraulic grooves through the connecting pipes.

[0008] The piston assembly is provided in multiple sets, and the multiple sets of piston assemblies are circumferentially distributed and connected to the hydraulic chamber respectively. The piston assemblies correspond to the hydraulic grooves.

[0009] The hydraulic component is connected to the mounting base, and the output end of the hydraulic component is connected to the oil supply pipe to provide pressure to the hydraulic tank.

[0010] The piston assembly includes a piston cylinder, a piston block, and a piston rod;

[0011] The piston cylinder is fixedly connected to the hydraulic chamber, and the piston cylinder is in communication with the hydraulic groove. The piston block is slidably connected inside the piston cylinder. The piston rod is slidably connected to the end of the piston cylinder away from the hydraulic chamber. One end of the piston rod is located inside the piston cylinder and fixedly connected to the piston block, and the other end of the piston rod is located outside the piston cylinder.

[0012] As a further embodiment of this utility model: the piston assembly also includes a fixed cylinder, a connecting rod, a return spring, a clamping head, and a stop block;

[0013] The fixed cylinder is connected to the end of the piston cylinder away from the hydraulic chamber. The stop block is slidably connected inside the fixed cylinder. The piston rod is fixedly connected to the stop block at one end outside the piston cylinder. The connecting rod is slidably connected to the fixed cylinder. One end of the connecting rod is fixedly connected to the stop block inside the fixed cylinder, and the other end of the connecting rod is outside the fixed cylinder. The clamping head is installed on the end of the connecting rod outside the fixed cylinder.

[0014] As a further embodiment of this utility model, an electromagnetic valve is installed inside the connecting pipe.

[0015] As a further embodiment of this utility model: the hydraulic assembly includes a hydraulic cylinder, a sealing sleeve, a pressure block, a telescopic rod, and a rotating connector;

[0016] The hydraulic cylinder is fixedly connected to the bottom of the mounting base, the pressure block is slidably connected inside the hydraulic cylinder, the sealing sleeve is fixedly connected to the end of the hydraulic cylinder away from the mounting base, the telescopic rod is slidably connected inside the sealing sleeve, one end of the telescopic rod is located inside the hydraulic cylinder and fixedly connected to the pressure block, and the other end of the telescopic rod is located outside the hydraulic cylinder and fixedly connected to the rotating connector.

[0017] As a further embodiment of this utility model: a fixed frame is fixedly connected to the outer wall of the hydraulic cylinder, a threaded cylinder is fixedly connected inside the fixed frame, a screw is threadedly connected inside the threaded cylinder, one end of the screw is rotatably connected to a rotating connector, and the other end of the screw is fixedly connected to a crank handle.

[0018] As a further embodiment of this utility model: a second connector is connected to the oil supply pipe, a first connector is connected to the outer wall of the hydraulic cylinder, and a hydraulic oil pipe is connected between the first connector and the second connector.

[0019] Compared with the prior art, the beneficial effects of this utility model are: this utility model drives the clamping head through multiple sets of hydraulic devices connected in parallel, so that the clamping force between the workpiece and the clamping head is the same at different clamping points, thereby realizing multi-point stable clamping of workpieces of different shapes, and can adaptively adjust the clamping distance of the clamping head according to the shape of the workpiece, thus improving the stability of the equipment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a workpiece positioning fixture for machine tool processing according to the present invention.

[0021] Figure 2 This is a schematic diagram of the structure of a workpiece positioning fixture for machine tool processing in this utility model.

[0022] Figure 3 This is a schematic diagram of the structure of a workpiece positioning fixture for machine tool processing in this utility model.

[0023] In the diagram: 1-Mounting base, 2-Hydraulic chamber, 3-Baffle, 4-Hydraulic groove, 5-Piston cylinder, 6-Piston block, 7-Piston rod, 8-Fixed cylinder, 9-Connecting rod, 10-Reset spring, 11-Clamping head, 12-Placement platform, 13-Hydraulic cylinder, 14-First connector, 15-Connecting pipe, 16-Oil supply pipe, 17-Solenoid valve, 18-Second connector, 19-Hydraulic oil pipe, 20-Sealing sleeve, 21-Pressure block, 22-Fixed bracket, 23-Threaded cylinder, 24-Screw, 25-Rotating connector, 26-Handle, 27-Telescopic rod, 28-Stop block. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] See Figures 1-3In this embodiment of the present invention, a workpiece positioning fixture for machine tool processing includes a mounting base 1, a hydraulic chamber 2, piston assemblies, and a hydraulic assembly. The hydraulic chamber 2 is mounted on the mounting base 1, and a placement platform 12 is fixedly connected to the mounting base 1. Multiple sets of circumferentially distributed partitions 3 are fixedly connected inside the hydraulic chamber 2, and hydraulic grooves 4 are provided between the partitions 3. Multiple sets of circumferentially distributed connecting pipes 15 are provided on the outer wall of the hydraulic chamber 2, and oil supply pipes 16 are fixedly connected to the multiple sets of connecting pipes 15. The oil supply pipes 16 are synchronously connected to the multiple sets of hydraulic grooves 4 through the connecting pipes 15. Multiple sets of piston assemblies are provided, and the multiple sets of piston assemblies are circumferentially distributed and respectively connected to the hydraulic chamber 2. The piston assemblies are connected to the hydraulic grooves 4. The hydraulic components are interconnected; the hydraulic assembly is connected to the mounting base 1, and the output end of the hydraulic assembly is connected to the oil supply pipe 16 to provide pressure to the hydraulic tank 4; the piston assembly includes a piston cylinder 5, a piston block 6, and a piston rod 7; the piston cylinder 5 is fixedly connected to the hydraulic chamber 2, and the piston cylinder 5 and the hydraulic tank 4 are interconnected; the piston block 6 is slidably connected inside the piston cylinder 5; the piston rod 7 is slidably connected to the end of the piston cylinder 5 away from the hydraulic chamber 2; one end of the piston rod 7 is located inside the piston cylinder 5 and fixedly connected to the piston block 6; the other end of the piston rod 7 is located outside the piston cylinder 5; the piston assembly also includes a fixed cylinder 8, a connecting rod 9, a return spring 10, a clamping head 11, and a stop block 28. The stop block 28 is slidably connected to the end of the piston cylinder 5 away from the hydraulic chamber 2. The piston rod 7 is fixedly connected to the stop block 28 at one end outside the piston cylinder 5. The connecting rod 9 is slidably connected to the fixed chamber 8. One end of the connecting rod 9 is fixedly connected to the stop block 28 inside the fixed chamber 8, and the other end of the connecting rod 9 is outside the fixed chamber 8. The clamping head 11 is installed on the end of the connecting rod 9 outside the fixed chamber 8. The operator first places the workpiece on the placement table 12, and then injects hydraulic oil into the oil supply pipe 16 through the hydraulic assembly. When the hydraulic oil flows into the hydraulic tank 4, the pressure in the hydraulic oil pushes the piston block 6 to slide inside the piston cylinder 5. The piston block 6 drives the piston rod 7 to slide inside the piston cylinder 5. The piston rod 7 slides out from the piston cylinder 5. The piston rod 7 drives the stop block 28 and the connecting rod 9 to extend out from the fixed cylinder 8. The stop block 28 compresses the return spring 10, and the connecting rod 9 drives the clamping head 11 to extend. Thus, the workpiece is clamped at multiple points through the cooperation of multiple sets of clamping heads 11. Since multiple sets of hydraulic grooves 4 are connected in parallel during the clamping process, the pressure of hydraulic oil in each set of hydraulic grooves 4 is the same. That is, the thrust on the clamping head 11 is also the same. Finally, the clamping force between the workpiece and the clamping head 11 at different clamping points is also the same. This achieves stable multi-point clamping of workpieces of different shapes and can adaptively adjust the clamping distance of the clamping head 11 according to the shape of the workpiece.

[0026] In one instance of this embodiment, please refer to Figures 1-3The connecting pipe 15 is equipped with a solenoid valve 17. The opening and closing of the connecting pipe 15 is controlled by the solenoid valve 17. After the clamping is completed, the connecting pipe 15 can be closed to prevent the hydraulic oil in the hydraulic groove 4 from flowing back along the connecting pipe 15, thereby sealing each set of hydraulic grooves 4 and preventing parallel connection between hydraulic grooves 4, which would cause hydraulic oil to flow back and affect the stability of workpiece clamping. When it is necessary to remove the workpiece, the solenoid valve 17 can be opened. At this time, the hydraulic oil flows back into the hydraulic cylinder 13, and the clamping head 11 loses its thrust, thereby losing the clamping and fixing of the workpiece.

[0027] In one instance of this embodiment, please refer to Figures 1-3 The hydraulic assembly includes a hydraulic cylinder 13, a sealing sleeve 20, a pressure block 21, a telescopic rod 27, and a rotating connector 25. The hydraulic cylinder 13 is fixedly connected to the bottom of the mounting base 1. The pressure block 21 is slidably connected inside the hydraulic cylinder 13. The sealing sleeve 20 is fixedly connected to the end of the hydraulic cylinder 13 away from the mounting base 1. The telescopic rod 27 is slidably connected inside the sealing sleeve 20. One end of the telescopic rod 27 is located inside the hydraulic cylinder 13 and fixedly connected to the pressure block 21. The other end of the telescopic rod 27 is located outside the hydraulic cylinder 13 and fixedly connected to the rotating connector 25. A fixing frame 22 is fixedly connected to the outer wall of the hydraulic cylinder 13. A threaded cylinder 23 is fixedly connected inside the fixing frame 22. A screw 24 is threadedly connected inside the threaded cylinder 23. One end of the screw 24 is rotated and connected to the rotating connector 25. The screw 24 is connected to a crank handle 26 at one end. A second connector 18 is connected to the oil supply pipe 16. A first connector 14 is connected to the outer wall of the hydraulic cylinder 13. A hydraulic oil pipe 19 is connected between the first connector 14 and the second connector 18. Turning the knob can drive the screw 24 to rotate. The screw 24 is connected to the threaded cylinder 23, which converts the rotational motion of the screw 24 into the linear motion of the screw 24. The screw 24 drives the telescopic rod 27 to move linearly by rotating the connector 25. The telescopic rod 27 drives the pressure block 21 to move in the hydraulic cylinder 13, thereby applying pressure to the hydraulic oil in the hydraulic cylinder 13. The pressure then enters the oil supply pipe 16 along the hydraulic oil pipe 19 and finally enters the hydraulic tank 4 through the connecting pipe 15.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A workpiece positioning fixture for machine tool processing, characterized in that, Includes mounting base, hydraulic chamber, piston assembly, and hydraulic components; The hydraulic chamber is mounted on a mounting base, and a placement platform is fixedly connected to the mounting base. Multiple sets of circumferentially distributed partitions are fixedly connected inside the hydraulic chamber, and hydraulic grooves are provided between the partitions. Multiple sets of circumferentially distributed connecting pipes are provided on the outer wall of the hydraulic chamber, and oil supply pipes are fixedly connected to the multiple sets of connecting pipes. The oil supply pipes are synchronously connected to the multiple sets of hydraulic grooves through the connecting pipes. The piston assembly is provided in multiple sets, and the multiple sets of piston assemblies are circumferentially distributed and connected to the hydraulic chamber respectively. The piston assemblies correspond to the hydraulic grooves. The hydraulic component is connected to the mounting base, and the output end of the hydraulic component is connected to the oil supply pipe to provide pressure to the hydraulic tank. The piston assembly includes a piston cylinder, a piston block, and a piston rod; The piston cylinder is fixedly connected to the hydraulic chamber, and the piston cylinder is in communication with the hydraulic groove. The piston block is slidably connected inside the piston cylinder. The piston rod is slidably connected to the end of the piston cylinder away from the hydraulic chamber. One end of the piston rod is located inside the piston cylinder and fixedly connected to the piston block, and the other end of the piston rod is located outside the piston cylinder.

2. The workpiece positioning fixture for machine tool processing according to claim 1, characterized in that, The piston assembly also includes a fixed cylinder, a connecting rod, a return spring, a clamping head, and a stop; The fixed cylinder is connected to the end of the piston cylinder away from the hydraulic chamber. The stop block is slidably connected inside the fixed cylinder. The piston rod is fixedly connected to the stop block at one end outside the piston cylinder. The connecting rod is slidably connected to the fixed cylinder. One end of the connecting rod is fixedly connected to the stop block inside the fixed cylinder, and the other end of the connecting rod is outside the fixed cylinder. The clamping head is installed on the end of the connecting rod outside the fixed cylinder.

3. A workpiece positioning fixture for machine tool processing according to claim 1, characterized in that, A solenoid valve is installed inside the connecting pipe.

4. A workpiece positioning fixture for machine tool processing according to claim 1, characterized in that, The hydraulic assembly includes a hydraulic cylinder, a sealing sleeve, a pressure block, a telescopic rod, and a rotating connector; The hydraulic cylinder is fixedly connected to the bottom of the mounting base, the pressure block is slidably connected inside the hydraulic cylinder, the sealing sleeve is fixedly connected to the end of the hydraulic cylinder away from the mounting base, the telescopic rod is slidably connected inside the sealing sleeve, one end of the telescopic rod is located inside the hydraulic cylinder and fixedly connected to the pressure block, and the other end of the telescopic rod is located outside the hydraulic cylinder and fixedly connected to the rotating connector.

5. A workpiece positioning fixture for machine tool processing according to claim 4, characterized in that, A fixed frame is fixedly connected to the outer wall of the hydraulic cylinder, a threaded cylinder is fixedly connected inside the fixed frame, a screw is threadedly connected inside the threaded cylinder, one end of the screw is rotatably connected to a rotating connector, and a crank is fixedly connected to the other end of the screw.

6. A workpiece positioning fixture for machine tool processing according to claim 4, characterized in that, A second connector is connected to the oil supply pipe, and a first connector is connected to the outer wall of the hydraulic cylinder. A hydraulic oil pipe is connected between the first connector and the second connector.

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