JPS62277239A - Fine adjustment for height of bit - Google Patents

Abstract

PURPOSE:To enable even a fine adjustment in height to be accomplised by utilizing both a piezo-electric element and a parallel spring supported by said piezo-electric element. CONSTITUTION:A bit 1 is fixed to a parallel spring section 3 with a bit fastening screw 2. The parallel spring section 3 is supported by a piezo-electric element 6 of a lower section under a condition stressed in advance, and is fixed on a base 7 common to the piezo-electric element 6. In addition, said base 7 is placed on a coarse adjustment table which is composed of a devotail groove 4, a vertical adjusting screw 5 and a devotail clamping screw 8. And the parallel spring section having an integral structure is constructed to be a link structure wherein each high rigidity section 11 through 14 is connected with each low rigidity section (a) acting as a contact point whereby the section 14 can be deformed vertically. Accordingly, an up and down mechanism making use of elastic deformation due to the parallel spring is provided, thereby eliminating not only the stick slip due to friction but also a clamping screw whereby a fine variation of the piezo-electric element can be converted into the variation in height directly, and furthermore, the bit can be held horizontally.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a mechanism for finely adjusting the height of a cutting tool in a machine tool.

[Conventional technology]

Conventionally, as shown in FIG. 2, in adjusting the height of a tool post, a height adjustment mechanism has been known which is constituted by a dovetail groove 4, a dovetail clamp screw 8, and a height adjustment knob 5.

[Problems to be Solved by the Invention] However, the conventional height adjustment mechanism had a problem in that the friction of the dovetail groove and threaded portion was large and fine adjustment was not possible. Therefore, in order to solve these conventional problems, the present invention has the following features:
The purpose is to be able to adjust the height even in extremely minute amounts, such as 1 micron or less.

[Means for solving problems]

In order to solve the above problems, the hide height fine adjustment 1 [l of the present invention uses a piezoelectric element and a parallel spring supported by the piezoelectric element in a machine tool that requires fine adjustment of the tool height. It is characterized by having been.

[Effect]

Since the vertical mechanism uses elastic deformation by parallel springs, there is no stick-slip caused by FFJ friction, no crank screws are required, and minute changes in the piezoelectric element can be directly converted into height changes, and the hide can be kept horizontally. be able to.

〔Example〕

Embodiments of the present invention will be described below based on the drawings. In FIG. 1, a cutting tool 1 is fixed to a parallel spring section 3 with a cutting tool fixing screw 2. The parallel spring part 3 is connected to the lower piezoelectric element 6
It is supported in a pre-stressed state and fixed to a common base 7 with the piezoelectric element 6. Moreover, the upper table 7 rests on a coarse adjustment table constituted by a dovetail groove 4, a vertical adjustment screw 5, and a dovetail groove clamp screw 8.

Fig. 3 shows an embodiment of the parallel spring part 3, in which the parts 11, 12, 13, and 14, which are integrally constructed but have high rigidity, form a link structure with the part a, which is weak in rigidity, as a contact point.
As if 11', 12', 13', 14', a in Fig. 4
′.

In the embodiments described above, the vertical mechanism utilizes elastic deformation by parallel springs, there is no stick-slip due to friction, no clamp screws are required, and minute changes in the piezoelectric element can be directly converted into changes in height. Moreover, you can keep the bite horizontal.

〔Effect of the invention〕

As explained above, the present invention has the effect of enabling ultrafine height adjustment of a cutting tool of 1 micron or less using a simple mechanism using a parallel spring and a piezoelectric element supporting it.

4. FiiJ 4i1 explanation of the drawings 1 Figure 1 is a three-dimensional view of the fine adjustment mechanism for the height of the tool according to the present invention, Figure 2 is a three-dimensional view of the conventional tool height adjustment mechanism, and Figure 3 is a parallel view of the mechanism for fine adjustment of the tool height. FIG. 4, a front view of the embodiment of the spring section, is a conceptual diagram of the parallel spring section.

l・・・・・・Part-time job 3...Parallel spring part 6...Piezoelectric element that's all

Claims (1)

[Claims] For machine tools that require fine adjustment of the tool height,
A mechanism for finely adjusting the height of a cutting tool, characterized by using a piezoelectric element and a parallel spring supported by the piezoelectric element.