JPH0454402A - Snap gauge - Google Patents

Abstract

PURPOSE:To obtain the snap gauge which has small deformation with time, high accuracy, and wear resistance by fixing a wear-resisting hard member to the inside edge of a recessed cut part of a substrate strongly without using an adhering means which uses heating such as soldering. CONSTITUTION:The key-shaped recessed cut part 2 is formed at one side of the flat plate type substrate 1 made of wear-resisting invariant steel and its inside edges 3 which face each other are formed in a projection/recess shape. In a figure, 4a and 4b are wear-resisting hard members made of ceramic, sintered high speed steel, super hard material, and recesses and projections conforming with the inside edges 3. Then the inside edges 3 are cocked from the top and reverse surfaces and then deformed to fix the wear-resisting hard members 4a and 4b to the inside edges 3 of the substrate 1 respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a scissor gauge used to measure the thickness of a plate, the diameter of a rod, etc.

[Prior art and its problems] Scissor gauges, which have been widely used in the past to inspect whether the thickness of plate materials, the diameter of bar materials, etc. meet specified dimensional tolerances, are used to inspect steel materials (SKS, 3 types). However, since the hardness of such heat-treated steel materials is limited to about HRC 60, there is a drawback that they wear out in a short period of time with use.

Therefore, an attempt was made to improve the wear resistance by applying cemented carbide to the parts subject to wear by brazing, but when brazing, that part is locally heated to about 800°C, which reduces internal stress. This causes the problem of deformation over time, making the measurement accuracy unreliable.

[Means for Solving the Problems] The scissor gauge of the present invention is intended to solve the above-mentioned problems, and includes forming a concave notch on one side of a flat substrate, and forming a flat opposing inner edge of the concave notch. It was formed into a dovetail-like uneven shape, and a wear-resistant hard member made of ceramics, high-speed steel, carbide, etc. was formed into an uneven shape that matched the inner edge, and the wear-resistant hard member was fitted to the inner edge. Then, the wear-resistant hard member is fixed to the substrate by banging the inner edge to deform it.

[Example 1] In FIG. 1, reference numeral 1 denotes a flat plate-like substrate made of wear-resistant permanent steel with a thickness of about 4 cm, and a hook-shaped recess 2 is formed on the negative side thereof. Opposing inner edge 3 of the recessed notch 2
, 3 are formed in a planar dovetail-like uneven shape. 4a and 4b are wear-resistant hard members made of ceramics, sintered high speed steel, carbide, etc., and their negative sides are formed with a concave-convex shape that matches the concave-convex shape of the inner edges 3, 3, as shown in FIG. Like inside $13
It fits into ゜3. Then, punch the inner edges 3, 3 from the upper and lower surfaces with a punch (not shown) or the like, and then punch the inner edges 3, 3 from the upper and lower surfaces.
3. By deforming 3, the wear-resistant hard member 4a
, 4b are fixed to the inner edges 3, 3 of the substrate 1, respectively. In addition, before hitting the inner side 1/#3.3, attach the wear-resistant hard member 4.
Adhesive may be used to temporarily secure a and 4b to the inside I&3°3.

In the scissor gauge manufactured in this way, especially the convex parts of the hard-hit inner parts #3 and 3 expand and deform outward in the recesses of the wear-resistant hard members 4a and 4b, so the wear-resistant hard members 4
a, 4b are firmly fixed without coming off from the inner #3, 3. In this way, the wear-resistant hard members 4a and 4b are attached to the substrate 1.
Once the abrasion resistant hard members 4a and 4b are firmly attached, the facing surfaces of the wear-resistant hard members 4a and 4b are ground to form a predetermined spacing, thereby making it possible to use them as a scissor gauge.

[Effects of the Invention] As described above, according to the present invention, a wear-resistant hard member can be easily and firmly fixed to the inner edge of a recessed portion of a substrate without using adhesive means that involve heating such as brazing. can do. This has the advantageous effect of providing an excellent scissor gauge that is less likely to deform over time, has high accuracy, and is wear resistant.

[Brief explanation of drawings]

The drawings show one embodiment of the scissor gauge of the present invention, with FIG. 1 being an exploded perspective view and FIG. 2 being a perspective view. DESCRIPTION OF SYMBOLS 1... Substrate, 2... Recessed part, 3... Inner edge, 4a
, 4b... Wear-resistant hard member No. I'I:A

Claims (1)

[Claims] A recessed portion is formed on one side of a flat substrate, and the opposing inner edges of the recessed portion are formed into a planar dovetail-like uneven shape, and a wear-resistant hard member such as ceramics, high speed steel, or carbide is attached to the surface. The wear-resistant hard member is formed into a concavo-convex shape that matches the inner edge, and the wear-resistant hard member is fitted to the inner edge, and then the inner edge is banged and deformed to fix the wear-resistant hard member to the substrate. A scissor gauge with this feature.