JPH0643681Y2 - Dimensional measuring device for cylindrical body with elliptical cross section - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a dimension measuring device for a cylindrical body having an elliptical cross section such as an elliptical ceramic structure.

(Prior Art) A ceramic honeycomb structure having an elliptical cross section used for automobile exhaust gas purification, etc., has an accurate cross-section contour to obtain even holding and sealing surface pressure when assembled in a converter. Required. For quantitative recording of this outline dimension, in general, in addition to the major and minor axes,
The size of the intermediate position is measured. For this intermediate position measurement, the conventionally shaped oval ceramic honeycomb structure is placed on a surface plate on which the maximum contour line and the dimension measurement line are marked, and the length on the dimension measurement line is measured using a caliper or the like. A method of measuring and measuring dimensions and inspecting for the occurrence of defects has been adopted. However, it is difficult for this method to accurately apply the vernier caliper blade to the side of the elliptic ceramic honeycomb structure directly above the dimension measurement line, and it requires skill to perform accurate measurement without error. There is a problem that it takes time to measure each piece.

(Problems to be Solved by the Invention) The present invention solves the conventional problems as described above, and makes it possible to easily and accurately determine the outer diameter of the elliptical ceramic honeycomb structure at the intermediate position between the major axis and the minor axis. It was completed for the purpose of measuring the size of a cylindrical body having an elliptical cross section that can be measured.

(Means for Solving the Problems) The present invention is based on the upper surface of a surface plate in which the set position of a cylindrical body having an elliptical cross section is indicated by scoring lines formed at both ends on the long axis side thereof. A pair of stators, which are in contact with the outer peripheral surface of the tubular body at two positions that are symmetrical with respect to the short axis of the tubular body, are provided on one side, and the other side of the surface plate has the long axis of the tubular body sandwiched therebetween. It is characterized in that position measuring elements on the outer peripheral surface of the cylindrical body are provided at positions symmetrical to the stator.

(Embodiment) Next, the present invention will be described in detail with reference to the illustrated embodiment.
(1) is a surface plate, and as shown in FIG.
Two set positions of the tubular body (30) having an elliptical cross section corresponding to the maximum dimension and the minimum dimension on the long axis side formed at both ends of the tubular body (30) on the long axis side. This is indicated by the respective scoring lines (2) and (3). On one side of the upper surface of such a surface plate (1), the tubular body is set at two positions symmetrical with respect to the minor axis (31) of the tubular body (30) set according to the scoring lines (2) and (3). A pair of stators (4), (4) contacting the outer peripheral surface of the body (30) are provided. In the embodiment, the stators (4) and (4) are rollers attached to both ends of the metal fitting (5), and are fixed by fixing the metal fitting (5) to the upper surface of the surface plate (1) with bolts (6). It is mounted on the board (1). On the other hand, on the other side of the surface plate (1), each stator (4), (4) is sandwiched by the long axis (32) of the tubular body (30).
Position measuring elements (7) and (7) on the outer peripheral surface of the tubular body (30) are provided at positions symmetrical to the positions. In the embodiment, the position measuring elements (7), (7) are provided with rollers (8) at the tips,
A dial gauge having (8), comprising a stator (4)
It has a structure in which the cylindrical body (30) can be sandwiched between and to measure its outer diameter dimension, but it is also possible to use an arbitrary measuring element such as a linear scale or a reflection type displacement measuring instrument. it can. Also, these position gauges (7), (7)
If an outer diameter dimension measured by the above exceeds a permissible value and a defective signal is emitted, it can be used as an inspection device.

Two parallel grooves (9) are provided on the upper surface of the surface plate (1).
(9) is recessed. These grooves (9) and (9) are made up of a master gauge finished to accurate dimensions on the surface plate (1).
It is intended to be set on the upper part, and the master gauge can be used to check the exact size of the position measuring elements (7) and (7).

(Operation) As shown in FIG. 1, a cylindrical body (30) such as a molded elliptical ceramic honeycomb structure is formed on both sides of the upper surface of the surface plate (1) on the long axis side as shown in FIG. Are set on the surface plate according to the scoring lines (2) and (3) respectively formed on the section, and the outer peripheral surface on one side thereof is fixed to the stator (4).
A position measuring element (7) which is placed in symmetry with the long axis (32) of the tubular body (30) so as to be in contact with (4),
(7) is brought into contact with the outer peripheral surface on the opposite side of the tubular body (30).
As a result, the outer diameter dimensions of two positions symmetrical with respect to the minor axis (31) of the tubular body (30) sandwiched from both sides by the stator (4) and the position measuring element (7) can be measured easily and accurately at the same time. It will be possible. Thus, according to the present invention, it is possible to measure the outer diameter dimension of the tubular body (30) having an elliptical cross section at an intermediate position between the major axis and the minor axis in a very short time without any skill. . In addition, the cylindrical body (30) on the surface plate (1)
At the time of setting, it is also possible to judge the quality of the major axis dimension by using the scoring lines (2) and (3). The master gauge can be set using the grooves (9) and (9) of the surface plate (1) to correct the error of the position gauges (7) and (7), so that accurate measurement is always performed. Can be done.

(Effect of the Invention) As is apparent from the above description, the present invention uses a conventional caliper for the outer diameter of the cylindrical body such as the elliptic ceramic honeycomb structure at the intermediate position between the major axis and the minor axis. Compared to the method, it can be measured very easily, in a short time, and accurately, so it is assumed that the problem of the conventional dimension measuring instrument of the cylindrical body having an elliptical cross section is eliminated. It is of great practical value.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, and FIG. 2 is a partially cutaway front view thereof. (1): surface plate, (4): stator, (7): position gauge,
(30): Cylindrical body.

Claims (1)

[Scope of utility model registration request] 1. A surface plate (where a set position of a cylindrical body (30) having an elliptical cross section is indicated by scoring lines (2) and (3) formed at both ends on the long axis side thereof. A pair of stators (4) and (4) contacting the outer peripheral surface of the tubular body (30) at two positions symmetrical with respect to the short axis of the tubular body (30) are provided on one side of the upper surface of 1), On the other side of the surface plate (1), each stator (4) is sandwiched by the long axis of the tubular body (30),
A dimension measuring instrument for a tubular body having an elliptical cross section, characterized in that position measuring elements (7), (7) on the outer peripheral surface of the tubular body (30) are provided at positions symmetrical to (4). .