JPH0222191Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> The present invention relates to a work pallet in which workpieces are fixed on a base plate in multiple stages above and below. Concerning work pallets used in machine tools.

《Prior art》 When machining a large number of workpieces with a machine tool such as a horizontal machining center where tools are held horizontally, a work pallet with clamping devices arranged in multiple stages above and below is used on the side of a center block set up on a base plate. I am using it.

In such work pallets, in order to easily attach and detach the workpieces, a hydraulic clamping device is fixed to the side of the center block directly or via a side plate, and the workpieces are clamped from above and below. I try to keep it.

<<Problems to be Solved>> In conventional work pallets, the clamping tools are fixed to the center block or side plates, so the distance from the center block to the position to be clamped by the clamping tools is fixed. As a result, it is not possible to properly fix workpieces of different shapes and dimensions, and a problem arises in that a large number of clamping devices having different lengths from the center block surface to the clamping position must be prepared.

<Means for Solving the Problems> The work pallet of the horizontal machine tool according to the present invention includes a base plate disposed horizontally, a center block made of one or more members erected on the base plate, and a center block on the side of the center block. A plurality of clamp cylinder holders are provided at appropriate intervals above and below so as to extend horizontally to the side, and each of the plurality of clamp cylinder holders has a reference surface for placing a workpiece on its upper surface. and a clamp cylinder which is installed in an upright and inverted manner so that the mounting position can be changed in the extending direction of each clamp cylinder holder, and which has a clamp head at the lower end of the piston rod, and the clamp cylinder is equipped with The workpiece placed on the reference surface of the tool is fixed to the reference surface using the clamp head of a clamp cylinder provided on a clamp cylinder holder located one step above the clamp cylinder holder. .

<<Operation>> In the work pallet of the horizontal machine tool according to the present invention, a workpiece is placed on the reference surface of the upper surface of each clamp cylinder holder other than the top stage, and the workpiece is placed on the reference surface of the upper surface of each clamp cylinder holder other than the top stage, and the workpiece is placed on the reference surface of the upper surface of each clamp cylinder holder except for the clamp cylinder holder one level above each clamp cylinder holder. Each workpiece is pressed and fixed to the reference surface by the clamp head of the clamp cylinder provided on the tool.

When fixing with the above-mentioned clamp cylinder, the position of the clamp cylinder can be appropriately changed in the extending direction of the clamp cylinder holder depending on the shape and structure of the work to press the work at an appropriate location.

Note that each clamp cylinder holder may be provided with a plurality of clamp cylinders, and each workpiece may be fixed with the plurality of clamp cylinders. On the other hand, if a plurality of sets of clamp cylinder holders are provided on each of the four sides of the center block, a large number of workpieces can be fixed to one workpiece pallet.

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

In the figure, 1 is the base plate of the work pallet P, and 2 is the horizontally arranged base plate 1.
This is a center block erected from the center block 2, and clamp devices 5 extending horizontally to the sides on each side surface 3 of the center block 2 are fixed in plural stages vertically at appropriate intervals.

Each clamp device 5 is formed of a clamp cylinder holder 6 fixed to the center block 2 and two vertically inverted clamp cylinders 7. A cylinder sliding groove 8 is formed in the middle and lower part of each clamp cylinder holder 6 over almost the entire length, and the cylinder sliding groove 8 opens at the outer end of the clamp cylinder holder 6, and the cylinder sliding groove 8 opens at the outer end of the clamp cylinder holder 6. 6
A rod groove 8a for inserting the rod 7a of the clamp cylinder 7 is formed at the lower end of the rod. The clamp cylinder 7 is assembled in a cylinder sliding groove 8 so as to be movable in and out, and can be fixed at any position with a fixing bolt 9. The rod 7a of each clamp cylinder 7 passes through the rod groove 8a and projects downward, and a clamp head 7b for holding the workpiece W is provided at the lower end of the rod 7a.

The clamp device 5 is formed in a horizontal plane parallel to the top surface 11 of the base plate 1 so that the top surface 10 of each clamp cylinder holder 6 serves as a reference surface for the clamp device 5 located one step above it.

The bottom portion 12 of the clamp cylinder 7 and a pressure oil supply path 13 formed in the center block 2 are communicated by a pressure oil hose 14. This pressure oil hose 14
is housed in a hose housing groove 15 formed in the upper half of the cylinder holder 6.

4 and 5 respectively show modified examples, and the one in FIG. 4 has pressure oil ports 18 opened at regular intervals on the lower surface 17 of the clamp cylinder holder 6, and the pressure oil port openings are connected to the cylinder. Fixed part 19
The clamp cylinder 7 is fixed to the cylinder holder 6 with the cylinder fixing bolt 9 with the pressure oil port 18 aligned with the pressure oil supply/discharge port 20 of the clamp cylinder 7. In the cylinder fixing portion 19 which is not provided, the pressure oil port 18 is sealed with a cover plate 21.

In addition, in the case shown in FIG. 5, pressure oil ports 18 are opened at regular intervals on the lower surface of the cylinder holder 6, and the pressure oil port openings are connected to the cylinder fixing part 19. After that, connect the pressure oil supply/discharge port 20 of the clamp cylinder 7 to the pressure oil port 18.
The clamp cylinder 7 is fixed to the cylinder holder 6 by screwing, and the unused pressure oil port 18 is sealed with a plug 22.

In each of the above embodiments, the cylinder holder 6 is attached to the center block 2 through the side plate.
It may be fixed to .

6 and 7 show another embodiment of the present invention, in which the center block 2 is formed of a plurality of reference block bodies 2a, and each reference block body 2a
A cylinder holder 6 formed in a flat plate shape is arranged between the cylinder holders 6 and the cylinder holder 6 is held between the reference block body 2a, and the clamp cylinder 7
The holding structure is the same as that shown in FIG.
Strictly speaking, the central part of the cylinder holder 6 held between the reference block bodies 2a, the central part of the uppermost cylinder holder 6 corresponding to the reference block body 2a, and the three sets of reference blocks The body 2a constitutes a center block 2. In this embodiment, the clamp cylinder 7 may be held in the manner shown in FIGS. 4 and 5.

In FIGS. 2 and 6, reference numeral 23 indicates a leveling block disposed on the base plate 1;
W is work.

《Effects》 The work pallet of the present invention is formed so that the mounting position of the clamp cylinder can be changed with respect to the cylinder holder, so the clamp cylinder can be moved to the optimal position according to the shape and dimensions of the work. Since the workpieces can be firmly fixed in position, one workpiece pallet can be used for many types of workpieces. As a result, the present invention can provide versatility as a work pallet, and can easily change setup depending on the type of work.

Furthermore, since the usage rate of one work pallet can be increased, the number of work pallets to be stored can be reduced, and the space for storing work pallets can be reduced.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, with Fig. 1 being a vertical sectional view of the main part, Fig. 2 being a front view of a work pallet, and Fig. 3 being a front view of a work pallet.
The figures are a sectional view taken along lines taken from FIG. 1, FIGS. 4 and 5 are a view corresponding to FIG. 1 showing a modified example of the clamp cylinder fixing structure, FIG. 6 is a front view of another embodiment, and FIG.
This figure is a longitudinal sectional view of the main part of the embodiment shown in FIG. 6. DESCRIPTION OF SYMBOLS 1... Base plate, 2... Center block, 5... Hydraulic clamp device, 6... Cylinder holder, 7... Clamp cylinder, 18... Pressure oil port, 19... Cylinder fixing part, 20... Pressure Oil supply/discharge port, W...work, P...work pallet.

Claims (1)

[Claims for Utility Model Registration] A base plate disposed horizontally, a center block made up of one or more members installed upright on the base plate, and a center block extending horizontally from the side of the center block and extending upward and downward. A plurality of clamp cylinder holders provided at appropriate intervals, each of which has a reference surface for placing a workpiece on its upper surface, and each clamp cylinder holder is attached to each clamp cylinder holder in its extending direction. The clamp cylinder is installed in an upright position so that the position can be changed, and the clamp cylinder has a clamp head at the lower end of its piston rod. A work pallet for a horizontal machine tool, characterized in that the work pallet is fixed to the reference surface by a clamp head of a clamp cylinder provided on a clamp cylinder holder one step above the clamp cylinder holder.