JPS6072666A - Work fixing device - Google Patents

Abstract

PURPOSE:To obtain a fixing device which firmly fix horizontally a work and which attaches and detaches easily the work by erecting plural pieces of work- holding stanchions and work-holding pins having holes for sucking are on a substrate and connecting the holes to a vacuum generator. CONSTITUTION:T-slots 22 are provided to a substrate 21 and work-holding stanchions 23 are erected near the outside edge of a work 24 and work-holding pins 25 are erected in the T-slots 22 so as to be positioned in other places. The stanchions and pins are respectively fixed by means of nuts 26. The height h1 from the base of the substrate 21 up to the top surface of the slots 22 is made the same in size with all the slots 22 in this case, by which the height h2 from the base of the substrate 21 to the bottom surface of the work 24 is made uniform. The work 24 is set on the top end faces of the fixed plural stachions 23 and pins 25 and holes 29, 30 thereof for sucking air are connected via flexible tubes 27, 28 to an external vacuum generator 31, by which the work 24 is sucked and fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a workpiece fixing device used in gas or laser cutting equipment.

Conventional configurations and their problems In recent years, gas and laser cutting devices have been widely used as highly efficient and highly accurate cutting methods, but especially when performing precision cutting, the workpiece and processing lens or processing nozzle may be in contact with each other. It is necessary for the workpiece to move relative to the workpiece in parallel and to be firmly fixed to the workpiece fixing device, and it must be easy to attach and detach. There was nothing for him to do, and he was struggling to improve his level of excellence.

A conventional workpiece fixing device will be described below with reference to FIGS. 1 to 3. As a first example, as in the first section, the support columns 2 are fixed upright at the four corners of the board 1, and the workpiece holding frame 3 is placed on top of them.
put on. After that, place the workpiece 5 on the upper surface 4 of the workpiece holding frame 3, and fix it with the stopper 6 or (17) top screw.Next, during actual machining, as shown in Fig. 2, the workpiece 5 or
The processing head 7 of the cutting device is moved to perform processing.

The disadvantage of this case is that the size of the workpiece is limited, and it cannot be fixed unless it is larger than the square hole of the workpiece holding frame 3 and approximately the same as the outer shape of the workpiece holding frame 3. Therefore, if the workpiece shape is of various sizes, This method has the disadvantage that many workpiece fixing devices must be manufactured. In addition, due to warping of the workpiece material or sagging of the center part due to weight, the distance between the processing head and the processing surface changes depending on the location of the workpiece, and the cutting accuracy such as cutting width and bevel angle changes, making it difficult to perform uniform processing. I couldn't.

As a second example, as shown in FIG. 3, a plurality of needle-like protrusions 9 are provided on a substrate 8, a workpiece 1° is placed on the protrusions, and processing is carried out using a cutting machine cutting machine rad 11. in this case,
The size of the workpiece is not limited, and it is possible to reduce the center part sagging due to weight. However, there are disadvantages in that the work 10 is not fixed, which causes displacement when the machine vibrates or the work is moved at high speed, and in that it is not possible to correct the stickiness of the work material.

Purpose of the Invention The present invention provides a method for horizontally and firmly fixing a workpiece using air suction in a gas or laser cutting device, etc.
The object of the present invention is to provide a workpiece fixing device that allows easy attachment and detachment of the workpiece.

Structure of the Invention The present invention has a structure in which a vacuum generator is connected to a support and a pin having an air suction hole, the support and the pin are planted on a substrate, and a workpiece is placed on the top surface of the plurality of pins and the support. By suctioning through the air suction holes in the , support, and pin,
There is no need for gluing or screwing, and the workpiece can be firmly fixed and easily attached and detached.

Description of examples An embodiment of the present invention will be described using FIGS. 4 to 6.

FIGS. 4a and 4b show a workpiece holding pin of a workpiece fixing device, in which an air suction hole 12 is provided in the center of the workpiece holding pin 11, and a flexible tube 13 is connected from the lower end. The tip should be needle-shaped to avoid beams and flames. The lower end of the pin has a one-shaped protrusion 14 for regulating the height. Since a plurality of work holding pins 11 are used, the dimensions 11 in the figure are made uniform. The screws 15 are screws for fixing to the board. Figure 5 a, b workpiece holding column 16
An air suction hole 17 is provided in the center which is smaller than the diameter of the air suction hole of the work holding pin, and a flexible tube 1 is provided.
Connect 8.

The lower end of the column has a single-shaped protrusion 19 that regulates the height, and since a plurality of columns are used like pins, 42 in the figure
The dimensions are uniform and the same as the dimension 41 in FIG. The screw 20 is a screw for fixing to the board.

FIGS. 6a and 6b are a top view and a side view showing the overall configuration of this embodiment. A T-shaped groove 22 parallel to the bottom surface of the substrate is provided in the substrate 21 so as to be fixed and slidable. Note that the number of single-shaped grooves may be increased or decreased from the number shown in the drawings as necessary. Place the workpiece holding column 23 described in FIGS. 5a and 5b near the outer edge of the workpiece 24, and the workpiece holding pin 25 described in FIGS. 4a and 4b at other locations, and fix them with nuts. .

In this case, by making the height hl from the bottom surface of the substrate 21 to the top surface of the T-shaped groove 22 the same for each port, the height h2 from the bottom surface of the substrate 21 to the bottom surface of the workpiece can be made uniform. A workpiece 24 is set on the upper end surfaces of a plurality of fixed workpiece holding columns 23 and workpiece holding pins 25, and an external vacuum generator such as a vacuum pump 31 connected to flexible tubes 2γ and 28 is used to open air suction holes 29. The work 24 is suctioned and fixed through the hole 30.

The workpiece holding column 23 has a large air suction hole 29 and a large contact area with the workpiece, so that it functions to firmly hold the workpiece 24. The workpiece holding pin 24 has a thin needle-like tip to avoid processing beams or flames, and since the contact area and air intake hole 3o are small, it functions to correct warpage and deflection and lightly fix it. However, if the workpiece movement speed is not so high and the workpiece is light and the inertia force is small, it is possible to use multiple workpiece holding pins 25 in parallel.
The workpiece can be sufficiently fixed even without the workpiece holding column 23.

Further, the work holding column 23 and the work holding pin 25 are connected to the external vacuum pump 31 using a flexible tube 2.
It is also possible to connect directly through the board hole without using 7.28.

Effects of the Invention As described above, the present invention has the following advantages: (1) Since the workpiece holding column and the workpiece holding pin can move freely, there is a degree of freedom in the shape and size of the workpiece. ■By increasing the number of workpiece holding pins, it is possible to correct the drop due to weight and the warping caused by overlapping. ■Since there are no fixing protrusions on the top of the workpiece,
There is no risk of collision between the processing head and nozzle. ■ Air suction fixation prevents damage to the workpiece. ■It is easy to attach and detach the workpiece. By adopting the 01-shaped groove, even if spatter lands on the substrate during cutting, the height h2 can be kept constant since the T-groove is used as a reference plane when sliding and fixing pins, etc. ■The tip of the work holding pin is needle-shaped, which prevents beams and flames from hitting it. It has the following effects.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an example of a conventional workpiece fixing device, Fig. 2 is a machining state diagram using the same device, and Fig. 3 is a machining state diagram using another example of the conventional workpiece fixing device. , Figure 4a
, b are a plan view and a front view of a workpiece holding pin of a workpiece fixing device according to an embodiment of the present invention, FIGS.
Diagram a. b is a plan view and a front view showing the overall configuration of the same embodiment. 11.25-・Work holding pin, 12.1 completed...
Air suction hole, 13.18 ... tube, 14゜1
9...T-shaped protrusion, 16.23--work holding column, 21--board, 22--1-shaped groove, 24--
・Workpiece, 31...Vacuum pump. Name of agent: Patent attorney Toshio Nakao et al.
+ [1 Figure 3 Figure 4 Figure 5

Claims (3)

[Claims] (1) A workpiece fixing device characterized in that a plurality of workpiece holding columns and workpiece holding bottles each having an air suction hole connected to a vacuum generator and a plurality of workpiece holding bottles are erected on a substrate. (2) The work holding column and work holding bin are at the end I.
It has an fCT-shaped protrusion, and a single-shaped groove is formed on the reprint, and the T
2. The workpiece fixing device according to claim 1, wherein the workpiece holding column and the workpiece holding bin are fixed to the substrate by fitting a shaped protrusion into the single-shaped groove. (3) The workpiece fixing device according to claim 1, wherein the vacuum generator is connected to the workpiece holding column and the air suction hole of the workpiece holding bottle by a flexible tube.