CN211991935U - An automatic clamping and positioning tool - Google Patents

Abstract

The utility model relates to an automatic clamping and positioning tool, which comprises a base (1), a pressing device arranged on the base (1) for pressing a workpiece, and a pressing device arranged on one side of the base (1) for restraining the workpiece. There are two depressing devices, which are respectively arranged on the left and right sides of the top of the base (1), and the depressing devices include a first hydraulic corner depression cylinder ( 2) and a pressure plate (3) arranged on the piston rod of the first hydraulic corner pressing cylinder (2), the pressing plate (3) moves together with the piston rod of the first hydraulic corner pressing cylinder (2); When the workpiece is clamped, the limit device on one side of the base can be used to limit the workpiece, so that the workpiece can be quickly placed in the required position, and then the workpiece can be pressed on the base by the pressing device.

Description

An automatic clamping and positioning tool

technical field

The utility model relates to an automatic clamping and positioning tool.

Background technique

In the field of machining, the speed of product replacement is accelerating and the variety is increasing. Therefore, the order batch is small and the product diversification is more and more obvious, resulting in the increasingly prominent multi-variety and small-batch production mode. Only by continuously improving the design and process, and grasping the quality and quantity of the products, can we meet the needs of the market economy. Improving the production efficiency of the machining center and reducing the auxiliary time have become the urgent problems to be solved in the processing process. Otherwise, when faced with a variety of parts, switching fixtures, multiple clamping and moving the workpiece will not only produce clamping errors, and the accuracy is difficult to control, but also The work load of the alignment and clamping is large, the production efficiency is low, and the cost is high. This requires suitable fixtures, which can effectively improve the switching clamping and positioning time of the machining center, ensure the installation accuracy of the fixtures, improve production efficiency and ensure quality.

Utility model content

The technical problem to be solved by the utility model is to provide an automatic clamping and positioning tool with simple action and high clamping efficiency.

The technical scheme adopted by the utility model is: an automatic clamping and positioning tool, which comprises a base, a pressing device arranged on the base for pressing the workpiece, and a limiter arranged on one side of the base for limiting the position of the workpiece bit device.

Further, there are two depressing devices, which are respectively arranged on the left and right sides of the top of the base. The depressing devices include a first hydraulic corner depressing oil cylinder fixed on the base and a depressing oil cylinder arranged at the first hydraulic corner. The pressure plate on the piston rod moves together with the piston rod of the lower pressure cylinder at the first hydraulic angle.

Further, a rubber pad is arranged on the bottom surface of one end of the pressing plate, and the other end of the pressing plate is fixed on the piston rod of the lower pressure cylinder at the corner.

Further, a dovetail-shaped connecting protrusion is provided on the rubber pad, and a dovetail groove matching the shape of the connecting protrusion is provided on the pressing plate.

Further, the rubber pad is U-shaped and covers the bottom surface and the left and right side walls of the pressing plate, the left and right side walls of the pressing plate are provided with dovetail grooves, and the rubber pad is provided with dovetail grooves on the left and right side walls. Corresponding connection bumps.

Further, the connecting protrusions are arranged radially with respect to the rotation center of the pressing plate.

Further, the limiting device includes a limiting rod and a rotation driving device for driving the limiting rod to rotate.

The rotation driving device is a second hydraulic angle pressing oil cylinder, and one end of the limit rod is fixed on the piston rod of the second hydraulic turning angle pressing oil cylinder.

A V-shaped groove for placing workpieces is provided on the top surface of the base, and the first hydraulic corner pressing oil cylinder is located on one side of the V-shaped groove.

The positive effect of the utility model is: when the utility model clamps the workpiece, the limiting device located on one side of the base can be used to limit the workpiece first, so that the workpiece can be quickly placed in the required position, and then the lower The pressing device presses the workpiece on the base. The press-down device adopts the design of hydraulic angle press-down cylinder, and its piston rod can realize both rotation and axial movement. When the workpiece is installed, it can be rotated to give way, and when the workpiece is placed in place, the pressure plate can be rotated to the position of the workpiece. Above, and then move the pressing plate downward to press the workpiece to realize automatic clamping and positioning. Through many tests, the operation is stable, safe and reliable, which can reduce the labor intensity of workers and improve the processing efficiency by automatic clamping and positioning, so that the actual processing efficiency is nearly doubled.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural schematic diagram of the pressing device of the present invention;

Fig. 3 is the structural schematic diagram of the limiting device of the present invention;

FIG. 4 is a schematic view of the structure of the dovetail groove of the present invention.

Detailed ways

As shown in the accompanying drawings 1-4, the present invention includes a base 1 for placing workpieces, a pressing device installed on the base 1 for pressing the workpieces, and a side wall of the base 1 for limiting the workpieces. position limiter.

In order to improve the clamping stability, there are two pressing devices, which are located on the left and right sides of the top surface of the base 1 respectively. The pressing plate 3 on the piston rod of the lower pressure cylinder 2 is provided with a rubber pad 4 on the bottom surface of the outer end of the pressing plate 3. The rubber pad 4 is used to prevent damage to the surface of the workpiece when it is in contact with the workpiece. The inner end of the pressing plate 3 and the first hydraulic angle The piston rod of the lower pressure cylinder 2 is fixed, and the pressure plate 3 moves together with the piston rod of the lower pressure cylinder 2 at the first hydraulic angle.

In order to improve the connection stability between the rubber pad 4 and the pressing plate 3 and facilitate replacement, a dovetail-shaped connecting protrusion 8 is provided on the rubber pad 4 , and a dovetail matching the shape of the connecting protrusion 8 is provided on the pressing plate 3 slot 9. The rubber pad 4 is U-shaped and covers the bottom surface and the left and right side walls of the pressing plate 3. The left and right side walls of the pressing plate 3 are provided with dovetail grooves 9, and the rubber pad 4 is provided with the left and right side walls. The connecting protrusions 8 corresponding to the upper dovetail grooves 9 are arranged radially with respect to the rotation center of the pressing plate 3 . In this way, not only the dovetail-shaped assembly structure located on the bottom surface of the pressure plate 3 can limit the movement of the rubber pad 4 in the left and right directions as shown in the figure, but also the dovetail groove 9 on the side wall of the pressure plate 3 can further limit the movement of the rubber pad in the left and right direction, so as to limit the movement of the workpiece in the left and right directions. movement in the left and right directions. The rubber throw 4 adopts a prefabricated installation method, which is also very convenient when it needs to be replaced.

The top surface of the base 1 is provided with a V-shaped groove 10 for placing the workpiece. After the workpiece is put into the V-shaped groove 10, the position of the workpiece along the width direction of the V-shaped groove can be positioned, and the pressure plate 3 And the rubber pad 4 can realize the movement limit of the workpiece in three directions of XYZ, effectively prevent the workpiece from moving during the processing, and improve the processing accuracy.

The limiting device includes a limiting rod 6 and a rotation driving device for driving the limiting rod 6 to rotate. The rotary driving device is a second hydraulic corner pressing oil cylinder 5, one end of the limit rod 6 is fixed on the piston rod of the second hydraulic corner pressing oil cylinder 5, and the other end has a top rod 7 for holding the workpiece. When the workpiece needs to be placed, the limit rod 6 is in a vertical state, and the position of the ejector rod 7 is located on one side of the V-shaped groove 10, which can withstand the workpiece, realize the rapid placement of the workpiece, and return to the horizontal state when processing is required. The limit rod 6 is also driven by a hydraulic angle downward pressure cylinder. Under the control of the single-chip microcomputer, the movement along the axial direction of the piston rod can be realized, and the position of the limit rod 6 can be moved to meet the limit requirements of different workpieces.

Under the action of the limiting device, the utility model realizes the rapid limiting of the workpiece by the limiting plate 6, and then the workpiece is pressed by the pressing plate 3. After pressing, the limiting plate 6 is reset. After the processing is completed, the pressing plate 3 is separated from the workpiece. Therefore, the workpiece can be replaced continuously, and the clamping efficiency and processing efficiency are greatly improved. At the same time, the utility model has a simple structure and low manufacturing and maintenance costs.

Claims (9)

1. An automatic clamping and positioning tool is characterized in that it comprises a base (1), a pressing device arranged on the base (1) for pressing the workpiece, and a pressing device arranged on one side of the base (1) for pressing the workpiece. Limiting device; There are two said pressing devices, which are respectively arranged on the left and right sides of the top of the base (1). A pressure plate (3) on the piston rod of a hydraulic corner depression cylinder (2), the pressure plate (3) moves together with the piston rod of the first hydraulic corner depression cylinder (2). 2. An automatic clamping and positioning tool according to claim 1, characterized in that a rubber pad (4) is provided on the bottom surface of one end of the pressure plate (3), and the other end of the pressure plate (3) is fixed under the corner on the piston rod of the hydraulic cylinder (2). 3. An automatic clamping and positioning tool according to claim 2, characterized in that a dovetail-shaped connecting protrusion (8) is provided on the rubber pad (4), and a dovetail-shaped connecting protrusion (8) is provided on the pressure plate (3) Connect the dovetail grooves (9) with matching shapes of the protrusions (8). 4. An automatic clamping and positioning tool according to claim 3, characterized in that the rubber pad (4) is U-shaped and covers the bottom surface and the left and right side walls of the pressing plate (3). 3) Dovetail grooves (9) are provided on the left and right side walls, and connecting protrusions (8) corresponding to the dovetail grooves (9) on the left and right side walls are provided on the rubber pad (4). 5. An automatic clamping and positioning tool according to claim 3 or 4, characterized in that the connecting protrusions (8) are radially arranged with respect to the rotation center of the pressing plate (3). 6 . The automatic clamping and positioning tool according to claim 1 , wherein the limiting device comprises a limiting rod ( 6 ) and a rotary driving device for driving the limiting rod ( 6 ) to rotate. 7 . 7. An automatic clamping and positioning tool according to claim 6, characterized in that the rotary driving device is a second hydraulic angle pressing oil cylinder (5), and one end of the limit rod (6) is fixed on the first Two hydraulic corners press down on the piston rod of the oil cylinder (5). 8 . The automatic clamping and positioning tool according to claim 6 , wherein a top rod ( 7 ) for holding the workpiece is provided at the free end of the limit rod ( 6 ). 9 . 9. An automatic clamping and positioning tool according to claim 1, characterized in that a V-shaped groove (10) for placing workpieces is provided on the top surface of the base (1), and the first hydraulic angle The lower pressure cylinder (2) is located on one side of the V-shaped groove (10).

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