JPH0344435Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a lightweight movable structure used for a table or the like that is moved at high speed in a machine tool.

(Prior Art) A processing table of a laser processing device or the like is usually made of cast iron or the like, and is driven at a high speed of several m/min based on an NC command. On the other hand, the use of YAG lasers and the like to cut metal plates with a size of 1 mm or less and a thickness of about 0.01 mm with an accuracy of 0.01 mm or less based on the NC directive is rapidly increasing. Furthermore, there is a growing demand for higher speeds in electrical discharge machining using wire electrodes or tape electrodes.

(Problem to be solved by the invention) In response to these demands, conventional processing tables, etc., were made of heavy materials such as iron as mentioned above, so due to the inertia of the table,
The problem is that the table does not follow the NC command, resulting in poor corner accuracy and a circular or elliptical shape, resulting in poor machining accuracy.

(Means for Solving the Problem) In order to solve this problem, the present invention proposes to make a movable structure such as a processing table using a composite material in which non-metallic fibers or whiskers with high tensile strength are integrally molded with a binder. This structure achieves weight reduction without reducing strength. In addition, by forming a hardened layer made of metal or ceramics on the surface of the movable structure,
Surface strength can be improved.

(Example) An example of the present invention will be described below with reference to the drawings.
FIG. 1 shows a processing table of a laser device to which the present invention is applied. The processing table 1 is mounted on a base 2 through a bearing 3 and has a drive mechanism 4 (a motor driven by an NC command It consists of a screw rod 5 rotated by a screw rod 5 and a block 7 having a screw hole 6 into which it is screwed.), and the base 2 can also be moved left and right in some cases.

A workpiece 8 is placed on the processing table 1,
The workpiece 8 is secured to the workpiece 8 by fitting a fixture 11 into a fixing screw 10 that is slidably attached to a T-groove 9 formed on the processing table 1.
Wing nut 1 held down and screwed onto fixing screw 10
It is fixed by tightening with 2.

According to the present invention, the main body 1a of the processing table 1 is made of a composite material in which non-metallic fibers or whiskers with high tensile strength are integrally molded with a binder. Examples of the fibers used include glass, carbon, aramid, aromatic nylon, polyester, polypropylene, polyethylene, and nylon, and examples of the whiskers include oxide ceramics such as alumina, nitride ceramics such as silicon nitride, and carbides. Ceramic whiskers are used. In addition, the binder may be polyester resin, epoxy resin mixed with a hardening agent, other resin binders, cement, etc., or metal alloy powder such as Al or Ti may be press-molded and sintered. It is used as a binder.
Further, the above-mentioned various binders may be combined and molded.
The T-groove 9 is made of stainless steel and press-fitted into the main body 1a before hardening.
As an example of the main body 1a, in which 30% by volume is made of alumina whiskers and the remainder is epoxy resin and carboxyl cement, the specific gravity is approximately
1.4 to 1.8, which is about one-fourth to one-fifth of that of cast iron.

In addition, in this embodiment, in order to improve the surface strength and smooth the surface, the surface of the movable structure 1 is coated with ceramics or ceramics fixed by hard chrome plating or by wire bombing as described in Japanese Patent Application No. 60-265365. A hardened layer 1b made of metal is formed.

FIG. 2 shows another application example of the present invention, in which a wire guides a wire electrode (or tape electrode) 13 on both sides of a workpiece 16 to enable high-speed wire cut electrical discharge machining. Guide 1
4, 15 are X-axis motors 18, 19 and Y-axis motor 2 driven by commands from the NC device 17.
In the case where the wire guides 14 and 15 are moved by the respective motors 18 to 21, the tables 22 to 25 holding the wire guides 14 and 15 are made of the same composite material as the processing table 1. As a result, weight reduction was achieved.

(Effects of the invention) As described above, in the invention, the movable structure is made of a composite material in which non-metallic fibers or whiskers with high tensile strength are integrally molded with a binder, so that weight reduction is achieved. In various types of machining, high-speed feeding becomes possible and positioning accuracy during high-speed feeding is improved.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an example of a processing table of a laser device to which the present invention is applied, and FIG. 2 is a side view showing an example in which the present invention is applied to a wire-cut electric discharge machining device.

Claims (1)

[Claims for Utility Model Registration] 1. A movable structure that installs or guides a workpiece or a tool for movement, and a movable structure made of a composite material in which non-metallic fibers or whiskers with high tensile strength are integrally molded with a binder. A lightweight movable structure characterized by comprising: 2. The lightweight movable structure according to claim 1, wherein a hardened layer made of metal or ceramics is formed on the surface of the movable structure.