JPH0433697B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an improvement of a suction table.

<Prior art and its problems> In a conventional suction table, as shown in FIG. 10, a vacuum chamber A is provided in the upper part of the table, and a waste plate C is placed on top of the vacuum chamber A. A suction hole E is formed in the waste board C in a portion corresponding to the workpiece W, and suction force generated in the vacuum chamber A acts on the bottom surface of the workpiece W to suction and fix the workpiece W. For this reason, each time the shape of the workpiece W differs, the waste board U must be prepared in a manner corresponding to that shape.

Also, since the processed material W is placed directly on the waste board U,
Depending on the shape of the bonito, the bonito extends to the bottom of the workpiece W, which has the disadvantage of cutting into the waste board and damaging the waste board.

<Means for Solving the Problems> The present invention aims to provide a suction table that eliminates the above-mentioned drawbacks, and is configured as follows.

In other words, a substrate with a large number of suction holes drilled in the thickness direction is fixed on the vacuum chamber of a suction table, and the suction holes that do not require suction force are closed by fitting lids, and the suction holes are closed. This suction table is characterized in that a suction pad is inserted and erected into a suction hole in a portion that requires force, and a workpiece is placed on the suction pad and fixed by suction.

<Function> By appropriately inserting the suction pad and the closing lid into the suction hole, it is possible to arbitrarily provide a portion where the suction force works and a portion where the suction force does not work. Therefore, by inserting and erecting suction pads according to the shape of the workpiece, the suction force can be applied only to the part corresponding to the shape of the workpiece, and not to other parts, without changing the board itself. You can prevent this from happening.

<Example> Examples of the present invention will be described below based on the drawings. In the drawings shown in FIGS. 1 and 2, reference numeral 1 denotes a substrate fixed onto a vacuum chamber 3 (see FIG. 9 for this part) of a suction table 2, and a large number of suction holes 4 are formed in a vertical and horizontal lattice pattern in the thickness direction. The suction hole 4 is a vertical hole with a stepped cross section consisting of a large diameter part 51 (diameter: 28 mm) and a small diameter part 52 (diameter: 20 mm), and the center-to-center pitch of each hole is 44 mm.
shall be. However, these numbers are just examples and are not limited to these.

A suction pad is inserted and erected in a portion of the suction hole 4 where the workpiece W is placed and fixed by suction. Reference numeral 6 designates a first embodiment of a suction pad, which is a cylindrical body with a step-shaped outer circumference having a small diameter portion 7 at the lower end as shown in FIG. 3, and a suction hole in the lower half as shown in FIGS. 4 and set it upright. A urethane ring 8 for preventing air leakage is attached to the upper edge. An internal space 9 with open ends at the top and bottom is provided inside, the lower end of which communicates with the vacuum chamber 3 of the suction table 2, and the upper end serving as a suction surface.
Reference numeral 91 shown in FIGS. 7 and 8 is for preventing the suction pads 6 from coming off. Push the suction pads 6 firmly between the four adjacent suction pads 6, and fix them by passing the screw 92 leading to the substrate 1 into the center screw hole.

Reference numeral 10 designates a second embodiment of the suction pad, which has a suction chamber 11 extending over four suction holes 4 as shown in FIGS.
An insertion end 1 is provided below which is inserted into each suction hole 4.
2 is provided, and a communication hole 121 is provided between the lower open end and the adsorption chamber 11. This suction pad 10
Since the suction chamber 11 is larger than that of the first embodiment, a larger suction force is generated than that of the suction pad 6 of the first embodiment.

Reference numeral 13 denotes a spike pin stand for preventing lateral displacement of the workpiece W, and as shown in FIG. 6, a screw hole 15 is provided in the projection 14 at the upper end, into which a spike pin 16 is screwed. The tip of this spike pin 16 is inserted into the bottom surface of the workpiece W as shown in FIG. 9 to prevent the workpiece W from shifting laterally.

Reference numeral 17 denotes a closing lid that closes off the suction hole 4 in a portion that does not require suction force, and is inserted into the large diameter portion 51 of the suction hole 4 to close it, as shown on the right side of FIG. Urethane 18 is attached to the bottom surface to prevent air leakage. Reference numeral 19 shown in FIGS. 7 and 8 is a holding plate for the closing lid 17, which presses one end of the four surrounding closing lids 17 from above, and fixes it by passing a screw 20 leading to the substrate 1 into the center screw hole.

Next, we will explain how to use this device. First, the suction pad 6 is inserted and erected into the suction hole 4 of the part where the workpiece W is placed, mainly the part that requires suction force, and the suction hole 4 of the part that does not require suction power is mainly the part where the workpiece W does not reach. The closing lid 19 is inserted and closed. (See Fig. 9) For parts that require a large suction force, use the suction pad 11 shown in the second embodiment.
Insert and set up. (See FIG. 4) Then, the internal space 9 of each suction pad 6 or the suction chamber 11 of the suction pad 11 communicates with the vacuum chamber 3 of the suction table 2. Therefore, by operating the suction table 2, the vacuum chamber 3
When the workpiece W is brought into a vacuum state, a suction force acts on the lower surface of the workpiece W to suction and fix it.

In addition, in places where there is a risk of the workpiece W slipping laterally due to large cutting resistance, insert the spike pin stand 15 into the suction hole 4 and insert the tip of the spike pin 18 into the bottom surface of the workpiece W. , fix this to prevent lateral slippage. (See FIG. 9) <Effects of the Invention> Since the present invention is configured such that the suction pad and the closing lid are inserted and erected arbitrarily into the suction hole of the substrate fixed on the suction table, the following effects occur.

(1) Since the suction portion and the non-suction portion can be freely provided on the substrate, the suction portion and the non-suction portion can be easily obtained mainly depending on the shape of the workpiece. Therefore, unlike conventional scrap boards, there is no need to prepare a corresponding one each time the shape of the processed material changes, and it is possible to handle various shapes of processed materials with a single board, making it extremely efficient and cost-effective. You can aim for down.

(2) Since the workpiece is placed on the suction pad, there is no risk of damaging the substrate even if the cutter extends below the workpiece.

(3) By changing the shape of the suction pad and using one with a larger suction chamber, a large suction force can be obtained even though the suction force of the suction table remains the same.

[Brief explanation of drawings]

Fig. 1 is a plan view showing the substrate, Fig. 2 is a front view thereof, Fig. 3 is a longitudinal sectional front view showing the suction pad of the first embodiment, and Fig. 4 is a view of the suction pad and closing lid of the second embodiment. A longitudinal sectional view showing the state of use, FIG. 5 is a plan view of the same, and FIG. 6 is a longitudinal sectional front view showing the spike pin stand.
Figure 7 is a plan view showing how the suction pad, closing lid, and retainer are used, and Figure 8 is A-A in Figure 7.
FIG. 9 is a vertical cross-sectional view showing how the suction pad, spike pin stand, and closing lid are used, and FIG. 10 is a vertical cross-sectional view showing the conventional suction table, waste plate, and processed material. W... Processing material, 1... Substrate, 2... Suction table, 3... Vacuum chamber, 4... Suction hole, 6... Suction pad, 9... Internal space, 10... Suction pad, 1
1... Adsorption chamber, 12... Insertion end, 17... Closed lid.

Claims (1)

[Claims] 1. A substrate with a large number of suction holes drilled in the thickness direction is fixed on a vacuum chamber of a suction table, and a closed lid is fitted to the suction holes that do not require suction force. The suction table is characterized in that a suction pad is inserted and erected into a suction hole in a portion that requires suction force, and a workpiece is placed on the suction pad and fixed by suction. 2. The suction table according to claim 1, wherein a cylindrical body having an internal space with upper and lower ends as open ends is inserted into the suction hole and erected as the suction pad. 3. The suction table according to claim 1, wherein the suction pad is provided with a suction chamber extending over a plurality of suction holes, and an insertion end is provided at the lower part of the suction chamber to be inserted into each suction hole.