JPH0214910Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> The present invention relates to a work pallet used in a machine tool such as a horizontal machining center, and particularly to a work pallet in which a work is clamped by a hydraulic clamping device.

《Prior art》 Conventionally, work pallets equipped with hydraulic clamping devices had to incorporate a cylinder for clamp operation, and pressure oil had to be supplied and discharged from the clamp cylinders. A pressure oil supply/discharge path is formed in the base plate, and a clamp cylinder is built into the base plate 2, so that the clamp device is arranged and fixed at a specific position on the base plate.

[Problem to be solved] With conventional work pallets equipped with hydraulic clamps,
Since the clamping device is fixed at a specific position on the base plate, it is not possible to move the clamping device depending on the shape of the workpiece, and the workpiece pallet is a special product, which is not suitable for high-mix, low-volume production. There are problems in that a large number of work pallets must be prepared, a large amount of work pallet storage space is required, and the work pallets themselves are heavy, making it troublesome to replace the work pallets.

《Means for solving the problem》 The present invention consists of a base part having a base frame having a U-shaped cross section fixed to the base plate, and a reference plate removably fixed to the upper surface of the base frame. The clamp cylinder is fixed to the underside of the reference plate, and the reference plate is fixed to the base frame with the clamp cylinder housed in the groove of the base frame. Only the reference plate can be replaced as the shape of the workpiece changes. This is how it was done.

<<Operation>> In this invention, the work pallet is composed of a base part formed by fixing a base frame with a U-shaped cross section on a base plate, and a reference plate detachably fixed to the upper surface of the base frame. Since it is used as a common member with the base, which is relatively heavy in shape, it is possible to handle workpieces of various shapes by replacing only the relatively lightweight reference plate.

<<Example>> FIG. 1 is a longitudinal sectional view of a main part, FIG. 2 is a partially cutaway perspective view of a work pallet, and FIG. 3 is a sectional view taken along the line XX in FIG. 1.

This work pallet 1 includes a base portion 5 formed by fixing a base frame 3 having a U-shaped cross section on a base plate 2 with the opening 4 facing upward;
The reference plate 6 is detachably fixed to the upper surface of the letter-shaped base frame 3.

The base frame 3 is formed on the upper surface of the base plate 2 in the shape of a cross extending from the center in all directions.
A large number of bolt holes 9 are provided at regular pitches on the upper surface 8 of the rising wall 7.

On the other hand, a clamping cylinder 11 is fixed to the lower surface 10 of the reference plate 6, and a piston rod 12 extending from the clamping cylinder 11 projects upward from the reference plate 6. It is connected to 13.

Bolt holes 9 formed in the upper surface 8 of the rising wall of the base frame 3
As shown in FIG. 4, the upper end thereof is formed into a pin fitting part 14, and the reference plate 6 is positioned with a positioning pin 15 fitted in this pin fitting part 14, and the reference plate 6 is used for clamping. The reference plate 6 is fixed to the base frame 3 with fixing bolts 17 while the cylinder 11 is housed in the groove 16 of the base frame 3.

In the figure, reference numeral 18 is a distance block, 19 is a positioning tool, 20 is a non-leak type hydraulic valve arranged in the center of the reference plate 6, and W is a workpiece.

In the work pallet 1 of the present invention, a reference plate 6 to which a clamping cylinder 11 is fixed is attached to a base frame 3 having a U-shaped cross section formed on a base plate 2.
Since the base frame 3 and the base plate 2 are used as common members and the reference plate 6 is replaced, a work pallet having an optimal clamping mechanism according to the shape of the work W can be obtained. be able to.

In the above embodiment, the base frame 3 is provided in the shape of a cross on the base plate 2, but it may be provided in the shape of a single character extending in the opposite direction from the center of the base plate, or in the shape of a polygon.

Further, the reference plate 6 does not need to cover the entire upper surface of the base frame 3, and may be disposed only on the outer side of the base frame 3, for example.

<<Effects>> In the present invention, the work pallet is composed of a base part consisting of a base plate and a U-shaped base frame, and a reference plate that can be attached to and detached from this base part, so the base part can be used as a common member. In addition to being inexpensive to implement, the clamping cylinder can be housed in the groove of the U-shaped base frame to protect the clamping cylinder.

In addition, the large and heavy base is a common component,
Since the relatively lightweight reference plate is removable from the base, it can be removed from the base and stored alone, resulting in a small storage space. Moreover, its handling becomes easier.

Furthermore, since it is sufficient to use a lightweight reference plate for replacing the reference plate, the replacement work is also facilitated.

[Brief explanation of the drawing]

1 is a longitudinal cross-sectional view of a main part, FIG. 2 is a partially cutaway perspective view, FIG. 3 is a cross-sectional view taken along the line X--X in FIG. 1, and FIG. 4 is a cross-sectional view of a bolt hole portion. 2...Base plate, 3...Base frame, 6...Reference plate, 7...6 rising walls 7, 10...6
Bottom surface of, 11... Clamp cylinder, 16...
3 groove.

Claims (1)

[Claims for Utility Model Registration] 1. Consists of a base part 5 having a base frame 3 having a U-shaped cross section fixed to the upper surface of the base plate 2 with an open top surface, and a reference plate 6 that is detachable from the base frame 3. , the clamp cylinder 11 is fixed to the lower surface 10 of the reference plate 6, and the clamp cylinder 11 is fixed to the lower surface 10 of the reference plate 6.
A work pallet with a hydraulic clamp for a machine tool, characterized in that a reference plate 6 is fixed on the upper surface of the base frame 3 while the reference plate 6 is housed in the groove 16 of the base frame 3. 2. A work pallet with a hydraulic clamp for a machine tool as claimed in claim 1, in which a base frame 3 is fixed to a base plate 2 in a cross shape in plan view.