CN205664757U - Measure instrument of work piece internal diameter - Google Patents

Abstract

The utility model discloses a tool for measuring the inner diameter of a workpiece, which comprises a fixed ruler frame, a sliding ruler frame and a ring gauge conforming to the size tolerance of the workpiece to be measured, and a fixed measuring head is arranged on the fixed ruler frame. A dial indicator is arranged on the sliding ruler frame, and the dial indicator moves back and forth along the direction where the fixed measuring head is located under the drive of the sliding ruler frame. The measurement method adopts the comparative measurement method. Firstly, a ring gauge conforming to the tolerance of the inner diameter of the part is manufactured in advance, and the real value of the size of the ring gauge is measured with a precision instrument. Before the measurement, the zero position of the dial indicator on the tool is corrected. The indicated value on the dial indicator is the deviation value of the workpiece relative to the ring gauge, from which the true value of the workpiece size can be calculated. By comparison, it can be judged whether the processed parts are qualified.

Description

A tool for measuring the inner diameter of a workpiece

technical field

The utility model relates to the technical field of measurement, in particular to a tool for measuring inner diameters.

Background technique

In mechanical engineering, it is often necessary to measure the inner diameter of processed sleeve parts. The inner diameter measuring tools currently used have a complicated structure and are inconvenient to use. For this purpose, a tool for measuring the inner diameter was designed.

Utility model content

The purpose of the utility model is to provide a measuring tool, which is suitable for measuring the inner diameter of sleeve parts and can meet the needs of the field of precision mechanical measurement.

The utility model adopts the following technical solutions:

A tool for measuring the inner diameter of a workpiece, including a fixed ruler frame, a sliding ruler frame and a ring gauge conforming to the dimensional tolerance of the workpiece to be measured, a fixed measuring head is arranged on the fixed ruler frame, and a fixed measuring head is arranged on the sliding ruler frame A dial indicator is set, and the said dial indicator moves back and forth along the direction where the fixed probe is located under the drive of the sliding frame.

Further, each of the fixed ruler frame and the sliding ruler frame includes a horizontal bar and a vertical bar connected to one end of the horizontal bar; the other ends of the two horizontal bars are movably connected in the horizontal direction, and the two vertical bars are arranged opposite to each other.

Further, the fixed measuring head is fixed on the inner side of the vertical rod of the fixed ruler frame by fastening screws.

Further, the dial indicator is fixed on the inner side of the vertical bar of the sliding frame by fastening screws.

Further, the centerlines of the fixed measuring head and the dial indicator are on the same straight line.

Further, a groove is provided on the horizontal rod of the fixed ruler frame, and the horizontal rod of the sliding ruler frame is embedded in the groove, and the two are fixed by adjusting screws.

Utilize described tool to measure the method for workpiece internal warp, as follows:

Step 1. Pre-manufacture a ring gauge with the same inner diameter as the part to be tested, and use precision instruments to measure the true value of the ring gauge size;

Step 2. Fix the fixed measuring head on the fixed ruler frame, and fix the dial indicator on the sliding ruler frame;

Step 4 Adjust the connectors of the fixed ruler frame and the sliding ruler frame so that the fixed probe and the dial indicator probe are in contact with the inner surface of the ring gauge in step 1; tighten the connectors to fix the positions of the sliding ruler frame and the fixed ruler frame, Then reset the pointer of the dial indicator to zero;

Step 5 Use the tool to measure the inner diameter of the part to be tested. At this time, the indicated value on the dial indicator is the deviation value of the part to be tested relative to the ring gauge, and thus the true value of the workpiece size can be calculated.

The beneficial effects of the utility model are as follows:

The measurement method adopts the comparative measurement method. Firstly, a ring gauge conforming to the tolerance of the inner diameter of the part is manufactured in advance, and the real value of the size of the ring gauge is measured with a precision instrument. Before the measurement, the zero position of the dial indicator on the tool is corrected. The indicated value on the dial indicator is the deviation value of the workpiece relative to the ring gauge, from which the true value of the workpiece size can be calculated. By comparison, it can be judged whether the processed parts are qualified.

The measurement error of this tool is mainly caused by the dial indicator and the calibration ring gauge. Since the error of the calibration ring gauge has been corrected, the measurement accuracy of this tool is the same as that of the dial indicator.

Description of drawings

In order to more clearly and effectively illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required in the embodiments are briefly introduced. It is self-evident that the accompanying drawings in the following description are only some embodiments of the present invention. Those of ordinary skill in the art can also make other drawings based on these drawings without creative work.

Fig. 1 is the structural representation of the sleeve type parts measured by the utility model.

Fig. 2 is a structural schematic diagram of a tool for measuring the inner diameter of the utility model.

In the figure: 1 fixed measuring head, 2 fastening screw, 3 fixed ruler frame, 4 groove, 5 adjusting screw, 6 sliding ruler frame, 7 fastening screw, 8 dial indicator probe, 9 dial indicator.

detailed description

Below in conjunction with accompanying drawing, the utility model is described in detail:

Figure 1 is a sleeve-type part, in which the depth of the large-diameter hole of the part is small, and it is inconvenient to use a general-purpose inner diameter measuring tool to measure. For this reason, disclose a kind of tool of measuring inner diameter, concrete structure is as follows:

As shown in Figure 2, the tool for measuring the inner diameter of the workpiece includes a fixed ruler frame 3, a sliding ruler frame 6 and a ring gauge that meets the dimensional tolerance of the workpiece to be measured, and a fixed measuring head is arranged on the fixed ruler frame 3 1. A dial indicator 9 is set on the sliding ruler frame 6, and the dial indicator 9 moves back and forth along the direction where the fixed measuring head is driven by the sliding ruler frame 3; the sliding ruler frame 3 is relative to the fixed ruler frame 3 can move back and forth.

Further, the fixed ruler frame 3 and the sliding ruler frame 6 each include a horizontal bar and a vertical bar connected to one end of the horizontal bar; the other ends of the two horizontal bars are movably connected in the horizontal direction, and the two vertical bars are relatively arranged; The horizontal rod of the ruler frame 3 is provided with a groove 4, and the horizontal rod of the sliding ruler frame 6 is embedded in the groove, and the two are fixed by the adjusting screw 5; when the dial gauge 9 needs to be moved, loosen the adjusting screw 5, Move the slide ruler frame 6 to get final product.

Further, the fixed measuring head 1 is fixed on the inner side of the vertical rod of the fixed ruler frame 3 through fastening screws 2 , opposite to the dial gauge measuring head 8 .

Further, the dial indicator 9 is fixed on the inner side of the vertical bar of the sliding scale frame 6 through the fastening screw 7, opposite to the fixed probe 1 . At the same time, in order to ensure the accuracy of the measurement, the centerlines of the fixed probe 1 and the dial indicator 9 are on the same straight line.

Further, the above-mentioned ring gauge is a standard part in the field of workpiece measurement, and the specific structure will not be repeated here.

The measurement method of the utility model adopts a comparison measurement method, firstly manufacture a ring gauge with the same inner diameter size as the part, and measure the real value of the ring gauge size with a precision instrument. First, fix the fixed measuring head 1 on the ruler frame with groove 3 with the fastening screw 2, fix the dial indicator 9 on the sliding ruler frame 6 with the fastening screw 7, and loosen the adjusting screw 5 to make the fixed measuring head of the tool Head 1 and dial indicator probe 8 are in contact with the inner side of the ring gauge, tighten the adjusting screw 5, fix the length of the grooved ruler frame 3 and the sliding ruler frame 6, and then reset the pointer of the dial indicator 9 to zero. When the tool is used to measure the inner diameter of the part, the indicated value on the dial indicator is the deviation value of the workpiece relative to the ring gauge, from which the true value of the workpiece size can be calculated. By comparison, it can be judged whether the processed parts are qualified.

Although the specific implementation of the utility model has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the utility model. Those skilled in the art should understand that on the basis of the technical solution of the utility model, those skilled in the art do not need to Various modifications or deformations that can be made with creative efforts are still within the protection scope of the present utility model.

Claims (6)

1. The tool for measuring the internal diameter of a workpiece is characterized in that: it includes a fixed ruler frame, a sliding ruler frame and a ring gauge that meets the dimensional tolerance of the workpiece to be measured, and a fixed measuring head is arranged on the fixed ruler frame, and the A dial indicator is arranged on the sliding ruler frame, and the dial indicator moves back and forth along the direction where the fixed probe is located under the drive of the sliding ruler frame. 2. The tool for measuring the inner diameter of a workpiece according to claim 1, characterized in that: said fixed ruler frame and sliding ruler frame each comprise a horizontal bar and a vertical bar connected to one end of the horizontal bar; The other end is flexibly connected in the horizontal direction, and two vertical bars are arranged oppositely. 3. The tool for measuring the inner diameter of a workpiece according to claim 2, wherein the fixed measuring head is fixed on the inner side of the vertical rod of the fixed scale frame by fastening screws. 4. The tool for measuring the inner diameter of a workpiece according to claim 2, wherein the dial indicator is fixed on the inner side of the vertical rod of the sliding frame by fastening screws. 5. The tool for measuring the inner diameter of a workpiece according to claim 2, characterized in that: the centerlines of the fixed measuring head and the dial indicator are on the same straight line. 6. The tool for measuring the inner diameter of a workpiece according to claim 2, characterized in that: a groove is arranged on the horizontal bar of the fixed scale frame, and the horizontal bar of the sliding scale frame is embedded in the groove, and the two are adjusted by the adjusting screw fixed.