CN201800034U - Plate specimen scale distance graver - Google Patents

Abstract

The utility model belongs to an auxiliary device for measuring the plate fracture elongation, in particular to a plate specimen scale distance graver, which consists of a transparent hard plastic plate, wherein the shape and the size of the hard plastic plate are identical to those of a plate specimen, two scale distance holes for making the original scale distance required by the plate specimen are arranged on the plate surface of the plate specimen scale distance graver, the scale distance holes are in a shape of rectangular holes, and the rectangular holes are transversely arranged on the axial line of the transparent hard plastic plate. When the plate specimen scale distance graver is used on the plate specimen, the original scale distance can be fast and accurately marked, errors caused by manual operation can be eliminated, the quality of the measurement work can be improved, and the operation is simple, convenient and fast.

Description

Plate sample gauge length marker

technical field

The utility model belongs to an auxiliary device for measuring the fracture elongation rate of a plate, in particular to a gauge marker for a plate sample. the

Background technique

According to the national standard GB/T 228-2002 "Metallic Materials Tensile Test Method at Room Temperature", the method of measuring the elongation of the plate after fracture is: accurately mark the specified original gauge length L ₀ on the axis of the parallel section of the shouldered plate sample, After being broken on a universal testing machine, align the fractured specimens, measure the gauge length L _U after fracture, and calculate the elongation A after fracture using the calculation formula.

Calculation formula A=(L _U -L ₀ )/L ₀ *100%

A = elongation after break

L ₀ = original gauge length

L _U = gauge length after break

It can be seen from the measurement principle and calculation formula that accurately marking the original gauge length is the key to accurately determining the elongation after break.

We used to manually mark the gauge length. The specific method is: fix the two corners of the vernier caliper to the specified original gauge length, place the two corners of the vernier caliper on the plate sample that needs to mark the gauge distance, and mark the mark with a marker pen. distance. Marking the gauge distance in this way mainly has the following disadvantages: a. The introduction of human operation errors, different people will produce different marking errors (the standard allowable error is ±1% of the gauge length); b. The thickness, position and coaxiality of the marking line will introduce errors to the measurement of the gauge length after breaking; c, marking is very inconvenient and time-consuming; these will bring errors to the accurate measurement of the elongation after breaking Quality cannot be effectively controlled.

Contents of the invention

The purpose of this utility model is to provide a plate sample gauge marker, which can quickly and accurately mark the original gauge distance on the plate sample, can eliminate the error caused by human operation, improve the quality of measurement work, and operate Easy and fast. the

The purpose of this utility model is achieved in this way: a plate sample gauge marker, the plate sample gauge marker is composed of a transparent hard plastic plate, and the shape and size of the hard plastic plate are the same as the plate sample , on the plate surface of the plate sample gauge marker, there are two gauge holes for the plate sample that need to mark the original gauge distance. The shape of the gauge hole is a rectangular hole. on the axis. the

Sheet sample gauge marker, use a transparent hard plastic sheet (about 0.1mm) to punch out the same size and shape as the sample on a punching machine, accurately mark the required marks on the transverse axis of the plastic sheet, and mark the Cut a small square hole with a width of 1.5mm and a height of 5mm. When marking the gauge length of the tensile sample, the gauge length can be accurately marked. This is easy to operate, can accurately mark the original gauge length, mark the marking rules, can accurately measure the gauge distance after fracture, and most importantly, can eliminate the error caused by human operation, and finally can accurately determine the elongation A of the plate sample after fracture. The utility model can quickly and accurately mark the original gauge length on the plate sample, can eliminate errors caused by human operation, improve the quality of measurement work, and is easy and fast to operate. the

Description of drawings

The utility model will be further described below in conjunction with the accompanying drawings, and the accompanying drawing is a schematic diagram of the front view of the utility model. the

Detailed ways

A plate sample gauge marker, as shown in the accompanying drawings, the plate sample gauge marker 1 is composed of a transparent hard plastic plate, the shape and size of the hard plastic plate are the same as the plate sample, Two gauge holes 2 that need to mark the original gauge length of the plate sample are arranged on the plate surface of the sample gauge marker 1. The shape of the gauge hole 2 is a rectangular hole, and the rectangular hole is horizontally arranged on the hard plastic plate. axis. The gauge hole 2 has a height of 5mm and a width of 1.5mm. The thickness of the transparent rigid plastic plate is 0.1-0.15mm.

Claims (3)

1. A plate sample gauge marker is characterized in that: the plate sample gauge marker (1) is made of a transparent hard plastic plate, and the shape and size of the hard plastic plate are the same as the plate sample, Two gauge holes (2) for the plate sample that need to mark the original gauge length are set on the plate surface of the plate sample gauge marker (1). The shape of the gauge hole (2) is a rectangular hole. It is arranged laterally on the axis of the transparent hard plastic plate. 2. The plate sample gauge marker according to claim 1, characterized in that: the gauge hole (2) has a height of 5 mm and a width of 1.5 mm. 3. The plate sample gauge marker according to claim 1, characterized in that: the thickness of the transparent hard plastic plate is 0.1-0.15mm.

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