CN219053681U - Hydraulic clamp suitable for workpieces of different specifications - Google Patents

Abstract

The utility model discloses a hydraulic clamp suitable for workpieces with different specifications, which comprises an assembly base assembled on a machine tool, wherein hydraulic driving devices are symmetrically arranged on the left and right sides of the assembly base, a main pressing part which is in contact with the surface of the workpiece is arranged at the top end of the assembly base, and an adaptive pressing part which is closely attached to the surface of the workpiece is arranged between the bottom of the main pressing part and the surface of the workpiece. The hydraulic clamp solves the problem that the clamping force of the clamping tool adopted at present is different at all positions, so that the clamping force is too large to damage the surface of the workpiece due to the fact that the clamping force is too large, and the workpiece cannot be clamped at the position with insufficient clamping force. Meanwhile, the adaptive compression part is arranged, so that the contact state of the adaptive compression part with the upper surfaces of workpieces of different heights can be always kept, the effective compression contact area and compression force are further ensured, the problem of compression injury caused to the surfaces of the workpieces is avoided, and the adaptive compression part can also be used for compressing workpieces of different widths through sliding adjustment.

Description

Hydraulic clamp suitable for workpieces of different specifications

Technical Field

The utility model relates to the technical field of workpiece clamping and machining, in particular to a hydraulic clamp suitable for workpieces with different specifications.

Background

In the prior art, in machining, a workpiece is usually clamped and fastened on a machining table of a machine tool, and the workpiece is machined and molded by a tool of the machine tool. In order to ensure the forming precision of the workpiece, the workpiece needs to have high clamping force during clamping so that the workpiece and a workbench of the machine tool are kept in a relatively fastened state, and the machining external force of the cutter can be overcome without deviation or sliding in the clamped state.

At present, the conventional workpiece clamping mode is to manufacture clamping tools with different specifications and match with a processing table of a machine tool to clamp a workpiece, and because a general workpiece has a larger processing surface, the clamping tools are required to be arranged at all positions (such as four corners) of the general workpiece to clamp the workpiece, and the clamping tools are usually fastened in a manual operation mode, so that the clamping forces at different positions are different, the problem that the clamping forces at different clamping positions are too large and too small exists, the clamping force is too large to cause the compression injury of the surface of the workpiece, the clamping force is insufficient, the problem of deflection or sliding exists under the processing external force of the cutter, and the processing precision of the workpiece is further affected. Meanwhile, the existing machining tool is complex in assembly structure, rapid adaptive adjustment cannot be performed according to workpieces with different specifications, and the machining period is prolonged.

Disclosure of Invention

Aiming at the problems, the utility model aims to provide the hydraulic clamp which is suitable for workpieces with different specifications, can realize synchronous flat adhesion clamping at each clamping position on the surface of the workpiece, can be suitable for clamping operations of the workpieces with different widths by horizontally sliding an adaptive pressing plate, is convenient to operate, solves the problem that the clamping tool is difficult to assemble quickly, and shortens the processing period of the workpiece.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: hydraulic clamp suitable for workpieces with different specifications, and is characterized in that: the hydraulic clamp comprises an assembly base assembled on a machine tool, hydraulic driving devices are symmetrically arranged on the assembly base in a left-right mode, a main pressing component in contact with the surface of a workpiece is arranged at the top end of the hydraulic driving device, and an adaptive pressing component which is closely attached to the surface of the workpiece is arranged between the bottom of the main pressing component and the surface of the workpiece.

Preferably, the hydraulic driving device comprises a hydraulic rod vertically arranged on the assembly base and close to the side edge, a supporting plate is vertically hinged to the inner side of the hydraulic rod, and the main pressing part is a pressing plate horizontally hinged to the top ends of the hydraulic rod and the supporting plate.

Preferably, the adaptive compression part comprises a rotating shaft penetrating through the pressing plate in a rotating mode, and the two ends of the adaptive compression part are connected with an adaptive pressing plate positioned at the bottom of the pressing plate.

Preferably, a sliding groove which is matched with the rotating shaft to slide left and right perpendicular to the axis of the rotating shaft is formed in the pressing plate, and a positioning groove embedded in the rotating shaft is formed in the inner top surface of the sliding groove at intervals.

The beneficial effects of the utility model are as follows: the hydraulic clamp solves the problems that the clamping force is different at each position by adopting the clamping tool manually at present, the surface of a workpiece is damaged by pressure caused by the overlarge clamping force, the workpiece cannot be clamped at the insufficient clamping force, and the workpiece is slightly inclined or the machining precision is affected due to the fact that the clamping force is not balanced at a plurality of positions.

Meanwhile, the adaptive compression part is arranged, so that the contact state of the adaptive compression part with the upper surfaces of workpieces of different heights can be always kept, the effective compression contact area and compression force are further ensured, the problem of compression injury caused to the surfaces of the workpieces is avoided, and the adaptive compression part can also be used for compressing workpieces of different widths through sliding adjustment.

Drawings

Fig. 1 is a front view of the hydraulic clamp of the present utility model.

Fig. 2 is an enlarged view of fig. 1 at a in accordance with the present utility model.

Fig. 3 is a left side view of the pressure plate of fig. 2 in accordance with the present utility model.

FIG. 4 is a schematic view of a hydraulic clamp of the present utility model clamping a workpiece.

Fig. 5 is an enlarged view of fig. 4 at B in accordance with the present utility model.

Detailed Description

In order to enable those skilled in the art to better understand the technical solution of the present utility model, the technical solution of the present utility model is further described below with reference to the accompanying drawings and examples.

Referring to fig. 1 to 5, a hydraulic clamp adapted to workpieces of different sizes is shown, which comprises a mounting base 1 (preferably a square plate) mounted on a machine tool, typically on a table (preferably a bolting) of a numerically controlled machine tool. The assembly base 1 is provided with a hydraulic driving device symmetrically left and right, and the top end of the assembly base is provided with a main pressing part which is contacted with the surface of a workpiece. As shown in fig. 1, the hydraulic driving devices are disposed at four corners (not shown in top view) of the assembly base 1, and are symmetrically disposed left and right and front and back to clamp four corners of a workpiece (shown in fig. 10). The workpiece is placed on the assembly base 1 and is positioned in a space surrounded by a plurality of hydraulic driving devices, the distance between the workpiece and each hydraulic driving device is kept to be basically equal, and then the main pressing part at the top end of the workpiece is pressed and contacted with the side edges of four corners of the upper surface of the workpiece by driving the hydraulic driving devices.

Because the heights of different workpieces are different, the main pressing part cannot realize flat adhesion and pressing with the workpiece surface under the different driving heights of the hydraulic driving device, so that the pressing force is reduced, and the problem of pressing damage is caused to the workpiece surface, and as shown in fig. 2-3, an adaptive pressing part which is tightly attached to the workpiece surface is arranged between the bottom of the main pressing part and the workpiece surface, and can always keep the contact state of flat adhesion with the upper surfaces of the workpieces with different heights, so that the effective pressing contact area and the pressing force are ensured, and meanwhile, the problem of pressing damage caused to the workpiece surface is avoided.

As shown in fig. 2, the hydraulic driving device comprises a hydraulic rod 2 vertically arranged on the assembly base 1 and close to the side edge, a supporting plate 3 is vertically hinged on the inner side of the hydraulic rod, and the main pressing component is a pressing plate 4 horizontally hinged on the top ends of the hydraulic rod 2 and the supporting plate 3. Through the up-and-down drive of the hydraulic rod 2 to the tail end of the pressing plate 4, the pressing plate 4 moves up and down under the hinged supporting function of the supporting plate 3, and the front end of the pressing plate 4 can contact the side edge of the surface of the workpiece to compress the workpiece. The pressing plates 4 arranged at the four corners are driven simultaneously by the hydraulic rods 2 connected respectively, so that synchronous pressing of workpieces is realized, and the problems that the existing manual clamping tool is different in pressing force at each position, the workpiece surface is damaged by pressing at the position with overlarge clamping force, the workpiece cannot be clamped at the position with insufficient clamping force, and the workpiece is slightly inclined or the machining precision is affected due to insufficient clamping force caused by unbalanced clamping force at the positions are solved.

As shown in fig. 2-3, the adaptive compression element comprises a rotating shaft 5 rotatably penetrating the compression plate 4, and an adaptive compression plate 6 at the bottom of the compression plate 4 connected to both ends thereof. Under the operation of clamping workpieces with different heights, the pressing plate 4 can be in an inclined pressing state (a state shown in fig. 5) with the horizontal plane, and in the state, the bottom surface of the adapting pressing plate 6 can be kept in a horizontal state all the time and is in close contact with the workpiece surface due to the fact that the adapting pressing plate 6 can rotate relative to the pressing plate 4 through the rotating shaft 5, the adapting pressing plate 6 can be flatly pressed on the workpiece surface by means of the pressure of the front end of the pressing plate 4, effective contact area and pressing force are guaranteed, and meanwhile the problem of pressure injury caused by the fact that the front end of the pressing plate 4 is in inclined contact with the workpiece surface is avoided. Preferably, a pressure sensor (not shown) is provided on each of the adapting pressure plates 6 to control the balance of the pressing forces of the plurality of adapting pressure plates 6 and the hydraulic driving force of each hydraulic rod 2.

In order to realize the pressing operation on workpieces with different widths on the basis of the flat paste pressing, as shown in fig. 2 and 5, a sliding chute 401 which is matched with the rotating shaft 5 and slides left and right perpendicular to the axis of the rotating shaft is formed in the pressing plate 4, and a positioning groove 402 embedded in the rotating shaft 5 is formed in the inner top surface of the sliding chute 401 at intervals. According to the width of the workpiece, the rotating shaft 5 can be driven to slide left and right in the chute 401, and the adapting pressure plate 6 is driven to move left and right, so that the adapting pressure plate 6 can be moved to a position where the adapting pressure plate can be completely contacted with the surface of the workpiece, and the rotating shaft 5 is contacted with the corresponding positioning groove 402, and in the process of driving the pressure plate 4 to rotate through the hydraulic rod 2, the rotating shaft 5 is embedded into the corresponding positioning groove 402, and the adapting pressure plate 6 is pressed on the surface of the workpiece.

The principle of the utility model is as follows: the assembly base 1 is fixedly assembled on a machining workbench of a numerical control machine tool or other machine tools, a workpiece is placed on the assembly base 1 and located in a space surrounded by a plurality of hydraulic driving devices, the distance between the workpiece and each hydraulic driving device is basically equal, the rotating shaft 5 is driven to slide left and right in the sliding groove 401, the adaptive pressing plate 6 is driven to move left and right, the workpiece is enabled to be in full contact with the surface of the workpiece, the rotating shaft 5 is enabled to be in contact with the corresponding positioning groove 402, in the process of driving the pressing plate 4 to rotate through the hydraulic rod 2, the rotating shaft 5 is embedded into the corresponding positioning groove 402, the adaptive pressing plate 6 is pressed on the surface of the workpiece, and the workpiece is synchronously pressed through the adaptive pressing plates 6 arranged at four corners.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (4)

1. Hydraulic clamp suitable for workpieces with different specifications, and is characterized in that: the hydraulic clamp comprises an assembly base (1) assembled on a machine tool, hydraulic driving devices are symmetrically arranged on the assembly base (1) in a left-right mode, a main pressing component in contact with the surface of a workpiece is arranged at the top end of the hydraulic driving device, and an adaptive pressing component which is closely attached to the surface of the workpiece is arranged between the bottom of the main pressing component and the surface of the workpiece.

2. A hydraulic clamp adapted to workpieces of different specifications as claimed in claim 1, wherein: the hydraulic driving device comprises a hydraulic rod (2) vertically arranged on the assembly base (1) and close to the side edge, a supporting plate (3) is vertically hinged to the inner side of the hydraulic rod, and the main pressing part is a pressing plate (4) horizontally hinged to the top ends of the hydraulic rod (2) and the supporting plate (3).

3. A hydraulic clamp adapted to workpieces of different specifications as claimed in claim 2, wherein: the adaptive compression part comprises a rotating shaft (5) which is rotatably arranged in the pressing plate (4) in a penetrating way, and two ends of the adaptive compression part are connected with an adaptive pressing plate (6) positioned at the bottom of the pressing plate (4).

4. A hydraulic clamp adapted to workpieces of different specifications as claimed in claim 3, wherein: a chute (401) which is matched with the rotating shaft (5) and slides left and right along the axis of the rotating shaft is arranged in the pressing plate (4), and a positioning groove (402) which is embedded into the rotating shaft (5) is arranged on the inner top surface of the chute (401) at intervals.

Images