CN208155199U - Axial dimension measuring device - Google Patents

Abstract

The utility model discloses an axial dimension measuring device, which comprises a base, a cylindrical core base and a measuring tool. Screw holes are provided at the corresponding positions where the bottom of the core base is connected to the base, and the core base and the base are connected by bolts. Fixedly connected, the measuring instrument includes a dial indicator fixed on the base, a lever connected with the dial indicator, and a probe arranged at the end of the lever. The utility model has an ingenious design and a simple structure, which solves the problem that common measuring tools cannot be directly measured, greatly reduces the man-hours of measurement and calculation in traditional measurement methods, avoids errors caused by tedious measurement and calculation, and improves measurement accuracy.

Description

An axial dimension measuring device

technical field

The utility model relates to a measuring tool in the field of mechanical processing, in particular to an axial dimension measuring device and a measuring method thereof.

Background technique

As shown in Figure 1, the size 20 has a higher precision requirement during assembly. During mass production, the size deviation of size 55, 45 and 30 is controlled, and the size chain calculation is used to ensure the error requirement of size 20. Before assembly, the actual measured dimensions of dimension 20 are divided into several groups, so that they can be grouped and assembled with the corresponding groups of matching parts. However, the two measurement surfaces of size 20 are the inner hole step surface 1 and the outer convex step surface 2, which cannot be directly measured by using a general measuring tool, but the actual values of the three dimensions of 55, 45 and 30 must be measured, so as to use the dimension chain to calculate Get the actual value for dimension 20. This method is very labor-intensive and time-consuming, and is prone to measurement and calculation errors.

Utility model content

The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide an axial dimension measuring device.

The technical solution to realize the first purpose of the present utility model is: an axial dimension measuring device, including a base, a cylindrical core seat and a measuring tool, and screw holes are provided at the corresponding positions where the bottom of the core seat is connected to the base , the core seat and the base are fixedly connected by bolts, and the measuring tool includes a dial indicator fixed on the base, a lever connected with the dial indicator, and a probe arranged at the end of the lever.

Furthermore, the base is made of metal material, and the dial indicator is magnetically adsorbed on the base, which is convenient for movement and disassembly.

Further, the core seat is provided with a draft angle to facilitate placement of workpieces.

The second object of the present utility model is to provide the aforementioned measuring method using the axial dimension measuring device.

Adopting the above-mentioned technical scheme, the utility model has the following beneficial effects:

The utility model has an ingenious design and a simple structure, which solves the problem that common measuring tools cannot be directly measured, greatly reduces the man-hours of measurement and calculation in traditional measurement methods, avoids errors caused by tedious measurement and calculation, and improves measurement accuracy.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is the measured part figure of the utility model;

Fig. 2 is a schematic structural view of the utility model.

In the figure: 1. Base, 2. Core seat, 3. Measuring tool, 3.1. Dial indicator, 3.2. Lever, 3.3. Probe, 4. Workpiece.

Detailed ways

In order to make the content of the utility model more clearly understood, the utility model will be further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

A kind of axial dimension measuring device as shown in Figure 2, comprises base 1, cylindrical core base 2 and measuring tool 3, the corresponding position that described core base 2 bottom is connected with base 1 is provided with screw hole, described The core base 2 and the base 1 are fixedly connected by bolts, and the measuring tool 3 includes a dial indicator 3.1 fixed on the base 1, a lever 3.2 connected with the dial indicator 3.1, and a probe 3.3 arranged at the end of the lever 3.2. The core seat 2 is provided with a draft angle which is convenient for workpiece placement.

Specifically, the base 1 is made of metal material, and the dial gauge 3.1 is magnetically attached to the base 1, which is convenient for movement and disassembly.

The working principle of the utility model is as follows:

①. First, the dimensions 55, 45 and 30 are strictly controlled in advance through the fine grinding method, and a precise workpiece 4 is processed to ensure that the deviation of the dimension 20 is controlled within plus or minus one thread, as a standard part;

②. Position the standard workpiece 4 on the core seat 5. The height of the core seat 5 is 10mm higher than the corresponding inner hole depth of the workpiece 4. The height gap between the workpiece 4 and the base 1 is 10mm. The dial indicator 3.1 is from the top surface of the base 1 to the workpiece 4 Measure the distance of the step surface, adjust the angle of the lever 3.2 and the height of the dial, press the probe 3.3 to make the hands turn half a circle, and then rotate the dial of the dial indicator 3.1 to zero;

③. When inspecting batch processed parts, only need to read the reading of dial indicator 3.1 to know the comparison value with the standard part 4, which can be directly used as the error of the measured part, so that the actual size of the part can be known.

The diameter of the core seat 2 is basically the same as the inner hole of the workpiece to be tested, and the two adopt clearance fit.

The workpiece shown above is just a special case. For similar special measuring surfaces, it is difficult to use general measuring tools to measure the size of parts. It only needs to replace the core seat 2 with different diameters and heights, and the measuring device and method can also be quickly obtained.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present utility model in detail. It should be understood that the above descriptions are only specific embodiments of the present utility model and are not intended to limit the present invention. For the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims (3)

1. An axial dimension measuring device, characterized in that: comprise a base (1), a cylindrical core seat (2) and a measuring tool (3), the bottom of the core seat (2) is connected to the base (1) Corresponding positions are provided with screw holes, the core seat (2) and the base (1) are fixedly connected by bolts, and the measuring tool (3) includes a dial indicator (3.1) and a dial indicator fixed on the base (1). The lever (3.2) connected to the submeter (3.1), and the probe (3.3) located at the end of the lever (3.2). 2. The axial dimension measuring device according to claim 1, characterized in that: the base (1) is made of metal material, and the dial gauge (3.1) is magnetically attached to the base (1). 3. The axial dimension measuring device according to claim 1, characterized in that: the core seat (2) is provided with a draft angle to facilitate the placement of the workpiece (4).