JPS629866A - Work supporting bed - Google Patents

Abstract

PURPOSE:To obtain a ground surface of good quality with no grinding flaw, by providing a mechanism, which horizontally swivels a bed in a direction at a right angle with the linear motion of a table, in the case of the work supporting bed in a surface grinding machine. CONSTITUTION:A work 2 is mounted to an upper part 3 of a work supporting bed, and its bottom part 5 is fixed to a table in a surface grinding machine, not shown in the drawing, by mounting parallel springs 4. And the bed provides in its side surface a double eccentric cam 6 to be connected by a connecting piece 7. The work supporting bed is given a swiveling motion in a direction at a right angle with the direction of a linear motion of the table by said eccentric cam 6. The grinding machine, which enables the amplitude of said swiveling motion and its swiveling speed to be controlled in accordance with abrasive grain size of a wheel 1 and its peripheral speed or a table speed and the like, can obtain a good polished surface with no grinding flaw.

Description

[Detailed description of the invention] 〔Technical field〕 The present invention relates to a workpiece support in a surface grinder.

[Background technology and its problems]

When performing plunge grinding on a cylindrical grinding machine that uses a cylindrical grinding wheel, when the grinding wheel shaft is composed of a cylindrical flat bearing, this is used to swing the grinding wheel in the axial direction while grinding or grinding. The technique of improving the quality of the ground surface mainly by erasing grinding marks by grinding the workpiece while swinging the table has already been known for quite some time.

This technique has not previously been applicable to flat VR machining.

That is, in surface grinding, it is not possible to pass through cylindrical plunge grinding sufficiently many times. To do this, the grindstone or table must be oscillated at high speed in a direction perpendicular to its stroke. However, it is not practical to swing the heavy cylindrical grindstone itself, the grindstone shaft, or the table at high speed.

For this reason, in a surface grinding machine that uses a cylindrical grindstone that rotates on a horizontal axis and consists of a table that moves linearly, the occurrence of grinding marks is inevitable, especially when the table movement does not feed at right angles to the workpiece. This is remarkable in creep feed grinding.

[Purpose of the invention]

The present invention is intended to improve the above-mentioned drawbacks of the prior art, and its purpose is to provide a workpiece support that enables high-speed rocking between the grinding wheel and the workpiece in a surface grinding machine.

[Structure of the invention]

A brief description of a typical structure of the inventions disclosed in this application is as follows.

That is, in a surface grinding machine equipped with a cylindrical grinding wheel that rotates on a horizontal axis and a table that moves linearly, the workpiece support stand installed on the table 1 is configured to swing at right angles to the movement of the table. It is.

Such a configuration provides the following effects.

That is, the workpiece support table is not heavy like a grindstone or a table, so it can be oscillated at high speed. In that case, there is no need to swing the grindstone and table at high speed as they are.

In particular, one or both of the swing amplitude and swing speed of the workpiece support can be controlled depending on the size of the abrasive grains of the grindstone, the circumferential speed of the grindstone, the table movement speed, etc.

By providing such a workpiece support stand, it is possible to eliminate grinding marks in a surface grinder and obtain a high-quality ground surface.

〔Example〕

The drawing shows an embodiment of a workpiece support according to the invention.

In this example, the structure is simplified by using an upright parallel spring, taking advantage of the fact that the swing amplitude is small enough to match the size of the abrasive grains of the grindstone (for example, 0.5 mm).

Oscillation uses a double eccentric cam rotated by a variable speed drive.

In the same figure, ■ is a part of the cylindrical grinding wheel, 2 is the workpiece, and 3 is the part of the cylindrical grinding wheel.
5 is a workpiece support.

Of these, 3 is the upper part of the support stand where the workpiece is directly attached;
Reference numeral 4 indicates a parallel spring, and reference numeral 5 indicates a lower part of the support base, which is fixed on a table (not shown) of a grinding machine. 6 is a double eccentric cam, and 7 is a connecting piece.

The present invention is not limited to the above-mentioned embodiments, and can be modified in various ways without departing from the spirit thereof.

For example, the workpiece support may use a static pressure bearing such as a compressed air bearing with low frictional resistance for swinging, or an electromagnetic or pneumatic machine may be used as the swinging means.

[Brief explanation of drawings]

The drawing is a front view of a workpiece support according to the present invention. 1: Cylindrical grinding wheel, 2: Workpiece, 3 to 5: Support, 6: Cam, 7
: Connection piece.

Claims (1)

[Claims] 1. A workpiece support for a surface grinding machine equipped with a cylindrical grinding wheel that rotates on a horizontal axis and a table that moves linearly, the workpiece support being located on the table and A workpiece support platform that is characterized by swinging horizontally and at right angles to motion. 2. In the workpiece support stand according to claim 1, the support stand can adjust one or both of its swing amplitude and swing speed.