Calibrator for detecting influence of radial stress of measuring rod of high-precision lever indicator on indicating value

Abstract

The utility model relates to a detector for detecting the influence of the radial stress of a measuring rod of a high-precision lever indicator on an indicating value, a Y-direction guide rail is fixedly arranged at the front end of a base, the Y-direction guide rail is connected with an X-direction guide rail through a connecting body, a precision inspection bench is fixedly arranged on the X-direction guide rail, and a standard semi-arc gauge block is arranged on the precision inspection bench; a stand column is fixedly installed at the rear end of a base, a lifting hand wheel is installed on the stand column, a precise vertical feeding frame is clamped on a lifting sleeve, the lifting sleeve is connected with a micro-motion adjusting hand wheel through a stop pin, the stop pin is screwed into the precise vertical feeding frame till an optical shaft is jacked into the other end of the lifting sleeve, and the lifting sleeve is fixedly installed on the stand column. A meter locking block is inserted into the precise vertical feeding frame, and a lever indicator is fixedly installed on the meter locking block through a meter locking nut. According to the utility model, the calibration precision is high, the working efficiency is high, uncertain measurement errors caused by cooperation design, increase and decrease of fixed connection and placement during calibration are reduced as much as possible during calibration, the calibration precision is improved, and the calibration precision of the dial indicator is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of verification and maintenance of measuring instruments, and particularly relates to a verification instrument for the influence of radial force on the indication value of the measuring rod of a high-precision lever dial indicator. Background Technique

[0002] Lever dial indicators are commonly used measuring instruments in machining. After a period of use, their metrological performance needs to be re-verified. Due to the structural characteristics of the lever dial indicator itself, the lever dial is often affected by radial forces during use. Therefore, this indicator belongs to the metrological performance indicators that are often unqualified for lever dial indicators. Compared with comprehensive verification instruments, single-item verification instruments can provide more precise and targeted verification tasks. Therefore, a verification instrument dedicated to verifying the influence of radial force on the indication value of the measuring rod of a lever dial will be very important for workshops of some small and medium-sized enterprises or schools. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a verification instrument for the influence of radial force on the indication value of the measuring rod of a high-precision lever dial indicator, which has a compact structure, is convenient to use, has a convenient operation, strong pertinence, preferably solves the problems of verification accuracy and speed during the verification process of the lever dial, and increases the reliability of verification data.

[0004] The utility model solves its technical problems through the following technical solutions:

[0005] A verification instrument for the influence of radial force on the indication value of the measuring rod of a high-precision lever dial indicator includes a base, a column, a lifting handwheel, a precision inspection table, an X-direction guide rail, a Y-direction guide rail, a lifting sleeve, a lifting handwheel and a standard semi-circular measuring block;

[0006] The Y-direction guide rail is fixedly installed at the front end of the base, the Y-direction guide rail is connected to the X-direction guide rail through a connecting body, the precision inspection table is fixedly installed on the X-direction guide rail, and the standard semi-circular measuring block is installed on the precision inspection table;

[0007] The column is fixedly installed at the rear end of the base, the lifting handwheel is installed on the column, a concave straight groove is arranged on the lifting sleeve, a precision vertical feed frame is clamped on the concave straight groove, a fine adjustment handwheel is connected to the lifting sleeve through a stop pin, the stop pin is screwed into the precision vertical feed frame until the optical axis abuts against the other end of the lifting sleeve, and the lifting sleeve is fixedly installed on the column; a watch locking block is inserted on the precision vertical feed frame, and a lever dial indicator is fixedly installed on the watch locking block through a watch locking nut.

[0008] Moreover, the column is fixed to the base by interference fit. A lifting nut is provided at the bottom end of the column. Large-pitch threads are machined on both the column and the lifting nut. By rotating the lifting nut, the vertical adjustment of the column is completed.

[0009] Moreover, a through keyway is machined along the generatrix direction of the column, and a through keyway is also machined on the lifting sleeve. The column and the lifting sleeve are connected by an anti-rotation flat key inserted into the through keyway.

[0010] Moreover, the surface of the precision inspection table is a smooth plane.

[0011] The advantages and beneficial effects of the present utility model are as follows:

[0012] 1. The structure of the present utility model is reasonable, with high calibration accuracy and high working efficiency. During calibration, the mating design is minimized, the fixed connections are increased or decreased, and the introduction of uncertain measurement errors during calibration is avoided, thereby improving the calibration accuracy and the calibration accuracy of the dial indicator.

[0013] 2. The present utility model is compact in structure, convenient to use, easy to operate, highly targeted, and preferably solves the problems of calibration accuracy and speed during the calibration process of the lever gauge, increasing the reliability of the calibration data.

[0014] 3. A through keyway is machined along the generatrix direction of the column of the present utility model, and a similar through keyway is machined on the lifting sleeve; the column and the lifting sleeve are connected by an anti-rotation flat key to prevent rotation during movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the front view of the present utility model;

[0016] Figure 2 is Figure 1 the left view of

[0017] Figure 3 is Figure 1 the top view of

[0018] DESCRIPTION OF THE REFERENCE NUMERALS

[0019] 1. Precision inspection table, 2. Precision vertical feed frame, 3. Anti-rotation flat key, 4. Y-direction guide rail, 5. Column, 6. Watch locking screw, 7. Micro-adjustment handwheel, 8. Lifting sleeve, 9. Stop pin, 10. Watch locking block, 11. Lifting handwheel, 12. Standard semi-circular gauge block, 13. X-direction guide rail, 14. Connecting body, 15. Base. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present utility model will be further described in detail below through specific embodiments. The following embodiments are only descriptive and not restrictive, and the protection scope of the present utility model cannot be limited thereby.

[0021] An instrument for verifying the influence of radial force on the indication of a high-precision lever dial indicator's measuring rod. Its innovation lies in: including a precision inspection table 1, a precision vertical feed frame 2, an anti-rotation flat key 3, a Y-direction guide rail 4, a column 5, a watch locking screw 6, a fine adjustment handwheel 7, a lifting sleeve 8, a stop pin 9, a watch locking block 10, a lifting handwheel 11, a standard semi-circular measuring block 12, an X-direction guide rail 13, a connecting body 14, and a base 15.

[0022] The Y-direction guide rail 4 is fixedly installed at the front end of the base 15. The Y-direction guide rail 4 is connected to the X-direction guide rail 13 through the connecting body 14. The precision inspection table 1 is fixedly installed on the X-direction guide rail 13, and the standard semi-circular measuring block 12 is installed on the precision inspection table 1;

[0023] The column 5 is fixedly installed at the rear end of the base 15. The lifting handwheel 11 is installed on the column 5. The lifting sleeve 8 is provided with a concave straight groove. The precision vertical feed frame 2 is clamped on the concave straight groove. The fine adjustment handwheel 7 is connected to the lifting sleeve 8 through the stop pin 9. The stop pin 9 is screwed into the precision vertical feed frame 2 until the optical axis abuts against the other end of the lifting sleeve 8. The lifting sleeve 8 is fixedly installed on the column 5; The watch locking block 10 is inserted into the precision vertical feed frame 2, and the lever dial indicator is fixedly installed on the watch locking block 10 through the watch locking nut 6.

[0024] The column 5 is fixed on the base 15 by interference fit. A lifting nut is provided at the bottom end of the column 5. Both the column 5 and the lifting nut are processed with large pitch threads. By rotating the lifting nut, the vertical adjustment of the column 5 is completed.

[0025] The column 5 is processed with a through key groove along the generatrix direction. The lifting sleeve 8 is processed with a through key groove. The column 5 and the lifting sleeve 8 are connected by the anti-rotation flat key 3 inserted into the through key groove to prevent rotation during movement.

[0026] The surface of the precision inspection table 1 is a smooth plane.

[0027] The working principle of the present utility model is:

[0028] First, adjust the vertical position of the column 5 through the lifting nut so that the front of the through key groove of the column 5 is aligned with the precision inspection table 1;

[0029] Adjust the lifting handwheel 11 and the fine adjustment handwheel 7 to make the position between the measuring head of the lever dial indicator and the arc measuring surface of the standard semi-circular measuring block 12 reasonable;

[0030] Adjust the placement of the standard semi-circular arc gauge 12 so that the generatrix of the arc measuring surface of the semi-circular arc gauge is parallel to the Y direction; push the precision inspection table 1 along the X direction, read the change in the inflection point reading of the dial indicator, and the radial force indication error in one direction can be measured.

[0031] Adjust the placement of the standard semi-circular arc gauge 12 so that the generatrix of the arc measuring surface of the semi-circular arc gauge is parallel to the X direction; push the precision inspection table 1 along the Y direction, read the change in the inflection point reading of the dial indicator, and the radial force indication error in the other direction can be measured.

[0032] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art can understand that: various substitutions, changes, and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the content disclosed in the embodiments and drawings.

Claims

1. A high-precision lever dial indicator measuring rod radial force on the indication of the calibration instrument, characterized by: It comprises a base (15), a column (5), a lifting hand wheel (11), a precision inspection table (1), an X-guide rail (13), a Y-guide rail (4), a lifting sleeve (8), a lifting hand wheel (11) and a standard semicircular arc gauge block (12); The Y-direction guide rail (4) is fixedly mounted on the front end of the base (15); the Y-direction guide rail (4) is connected to the X-direction guide rail (13) via a connector (14); the precision inspection table (1) is fixedly mounted on the X-direction guide rail (13); and the standard semicircular arc gauge block (12) is mounted on the precision inspection table (1); The rear end of the base (15) is fixedly mounted on the column (5), the lifting hand wheel (11) is mounted on the column (5), a concave straight groove is provided on the lifting sleeve (8), the precision vertical feed frame (2) is clamped on the concave straight groove, the lifting sleeve (8) is connected to the fine adjustment hand wheel (7) via a stop pin (9), the stop pin (9) is screwed into the precision vertical feed frame (2) until the optical axis is pushed into the other end of the lifting sleeve (8), and the lifting sleeve (8) is fixedly mounted on the column (5); a locking meter block (10) is inserted into the precision vertical feed frame (2), and a lever dial indicator is fixedly mounted on the locking meter block (10) via a locking meter nut (6).

2. The calibrator for determining the influence of radial force on the indication of a high-precision lever dial gauge according to claim 1 is characterized in that: The column (5) is fixed on the base (15) by interference fit, a lifting nut is arranged at the bottom end of the column (5), and large-pitch threads are processed on the column (5) and the lifting nut. The lifting nut is rotated to complete the vertical adjustment of the column (5).

3. The calibrator for determining the influence of radial force on the indication of a high-precision lever dial gauge according to claim 1, characterized in that: The column (5) is processed with a through keyway along the busbar direction, and the lifting sleeve (8) is processed with a through keyway. The column (5) and the lifting sleeve (8) are connected via an anti-rotation flat key (3) that penetrates into the through keyway.

4. The calibrator for determining the influence of radial force on the indication of a high-precision lever dial gauge according to claim 1, characterized in that: The surface of the precision inspection table (1) is a smooth plane.

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