JP2001289601A - Tool for correcting eccentricity of lever type dial gauge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a lever type dial gauge usable for the measurement of the diameter of a hole having a nearly equal diameter to that of a probe and to reduce the erroneous reading of the dial of a dial gauge. SOLUTION: In the lever type dial gauge in which the center line of a supporting section and the center of the moving direction of the probe are deviated from each other, the center of the moving direction of the probe and the center of a supporting section are made to coincide with each other by using a tool for correcting alignment in which the center axis of a holding section is eccentrically arranged from the center axis of the supporting section.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The field of correcting misalignment of dial gauges.

[0002]

2. Description of the Related Art When measuring the center position of a hole The measurement has been performed by rotating the probe around the support of the dial gauge in a state of contacting the side wall of the hole.

[0003]

When the rotational axis of the hole is measured because the center axis of the support portion of the dial gauge and the center axis of the direction of movement of the measuring element are displaced, a portion deviating from the direction of movement of the spherical measuring element is as follows. The measurement is performed with the side wall of the hole in contact, and the lever movement is inappropriate, resulting in a measurement error. In addition, the measurement of a hole close to the size of the probe causes the phenomenon to be remarkable, making measurement impossible. Further, when the center point of the spherical probe is set to the measurement position on the Y-axis line which is perpendicular to the center point of the hole, the dial surface is shifted from the front, causing a visual error in reading the pointer of the dial.

[0004]

Means for Solving the Problems In a dial gauge in which the center line of the support portion and the center of the moving direction of the tracing stylus are shifted, the misalignment of the dial gauge in which the center axis of the support portion and the center axis of the holding portion are eccentric. Use tools.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In a dial gauge in which the center line of the support portion and the center of the direction of movement of the tracing stylus are shifted.
A tool for correcting misalignment of the dial gauge in which the center axis of the supporting part and the center axis of the holding part are eccentric is used. According to the method, the dial gauge support is mounted on the holding part which is eccentric with respect to the support of the product of the present invention in order to make the direction of movement of the measuring element and the support of the dial gauge coincide with each other. The direction of movement of the tracing stylus of the dial gauge and the support of the product of the present invention is synchronized. Further details are described below. The gauge a part of FIG. 1 is lightly inserted into the part 2b of FIG. 1 (the product of the present invention), and the mounting state is achieved as shown in FIG. The part 2a in FIG. 1 is attached to the part 6 in FIG.
Move the 1c portion of FIG. 1 to 5 in FIG. 7 until the 1e (pointer of the dial) portion starts to move. Check that is located in front. When 1d is not located at the front, 6 in FIG. 7 is fixed, and only 1 is forcibly turned so that 1d is located at the front as shown in FIG. After the work above is repeated several times 1e
It can be confirmed that 1d is located at the front in the position where the maximum swing occurs, which means that the center lines of the portions 2a and 1c coincide as shown in FIG. 1 (mounting state).

[0006]

According to the present invention, when a hole is measured with a dial gauge not equipped with the product of the present invention, since 1f (moving direction of the measuring element) is not directed to the center of the hole as shown in FIG. 3 or FIG. An error is likely to occur, making it impossible to measure a hole close to the probe diameter. Also, the dial scale part was shifted from the front as shown in FIG. 3, but when the hole measurement was performed after the work after mounting the product of the present invention, as shown in FIG. The measurement of small diameter holes becomes possible, and the reading of the dial scale becomes accurate. It was possible to measure accurately and easily without changing the same method of rotation measurement as before, and it was also possible to measure small diameter holes, which was impossible, and the effect of reducing visual misperception was obtained. In addition, when used for work paralleling work, the dial faced forward with the tracing stylus moving perpendicular to the parallel moving work, thus reducing measurement errors.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional front view showing a state in which a lever type dial gauge is supported by a product of the present invention, and a right view is a perspective view showing only the product of the present invention.

FIG. 2 is a front view showing a lever type dial gauge.

FIG. 3 is a top view showing the direction of movement of a tracing stylus and the direction of a dial gauge in conventional hole measurement.

4 is a top view showing a position of a tracing stylus when the dial gauge of FIG. 3 is directed to the front.

FIG. 5 is a top view showing an improved direction of movement of a tracing stylus and a direction of a dial gauge using the product of the present invention.

FIG. 6 is a top view showing an operation of correcting a displacement between a product of the present invention and a measuring element of a dial gauge.

FIG. 7 is a front view showing a state where the work of FIG. 6 is mounted on a milling machine.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 lever type dial gauge 2 b 1 a hole for holding 1 a (light press-fitting) 1 a 1 support shaft 3 hole to be measured 1 b 1 measuring arm 4 part of main spindle part of milling machine 1 c 1 measuring element 5 milling machine table 1d Dial surface of part 1d 1 Chuck part of milling machine 1e Dial pointer of 1 7 Table of milling machine having 6 right angles 6f 1f Movement direction of 1c during measurement Workpiece (work) fixed to 2 Support shaft of the present invention 2a 2

Claims (1)

[Claims] 1. A lever type dial gauge (hereinafter referred to as a dial gauge) in which a center line of a support portion and a center of a movement direction of a tracing stylus are displaced. Tool for correcting misalignment of dial gauges.