Comprehensive calibrating instrument for dial indicator

Abstract

A dial indicator is installed on a dial indicator clamping unit, an inspection bench is arranged on an inspection bench adjusting unit, a semi-arc calibration gauge block is installed on the inspection bench, and a micrometer head is installed on a micrometer head clamping unit. The dial indicator adjusting unit adjusts the distance between the dial indicator and the semi-arc verification gauge block to complete verification of the metering index of the influence of the radial stress of the measuring rod in the two directions of the dial indicator on the indicating value. The dial indicator adjusting unit adjusts the dial indicator to be in contact with the dynamometer to complete measurement force verification; the dial indicator adjusting unit adjusts the relative position of the dial indicator and the micrometer head to complete the verification of the dial indicator value error and the return error. The dial indicator calibrating device is reasonable in structure, convenient to use and convenient to operate, well solves the problem that various calibrating instruments are needed in the dial indicator calibrating process, reduces the input cost, and increases the calibrating efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of verification and maintenance of measuring instruments, and particularly relates to a dial indicator comprehensive calibrator. Background Art

[0002] During the use of dial indicators and lever indicators, if accidental collisions occur or the measurement performance needs to be verified again after a certain period of time, in addition to the appearance, the main measurement performance verification items include measuring force, repeatability, influence of radial force on the measuring rod on the indication value, indication error, return error, etc. There are various types of dial indicator and lever indicator calibrators sold on the market, with different functions. Most brands have the ability to comprehensively verify the above measurement performances, but some brands are time-consuming and laborious to operate and not convenient to use, while some brands have fewer functions and cannot perform various measurement performance verification operations. There is a lack of a comprehensive dial indicator and lever indicator calibrator that integrates all functions. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a dial indicator comprehensive calibrator with numerous functions, reasonable structure, convenient use and easy operation, which preferably solves the problem of the need for multiple calibration instruments during the calibration process of dial indicators, reduces the input cost and increases the calibration efficiency.

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

[0005] A dial indicator comprehensive calibrator includes a base and a dial indicator adjustment unit, an inspection table adjustment unit, a micrometer head clamping unit and a dynamometer arranged on the base. A dial indicator is installed on the dial indicator clamping unit, an inspection table is arranged on the inspection table adjustment unit, a semi-circular calibration block is installed on the inspection table, a micrometer head is installed on the micrometer head clamping unit. The dial indicator adjustment unit adjusts the distance between the dial indicator and the semi-circular calibration block to complete the verification of the measurement index of the influence of the radial force on the measuring rod of the dial indicator in two directions on the indication value; the dial indicator adjustment unit adjusts the contact between the dial indicator and the dynamometer to complete the verification of the measuring force; the dial indicator adjustment unit adjusts the relative position between the dial indicator and the micrometer head to complete the verification of the indication error and return error of the dial indicator.

[0006] Moreover, the dial indicator adjusting unit includes a column, a gearbox, a gear shaft, a gear, a vertical fine adjustment block and a clamp. A V-shaped groove and a rack are provided on the column. The gear shaft is inserted into the gearbox. A woodruff key, a gear and a snap ring are sequentially sleeved on the gear shaft. A vertical direction adjusting handle is installed on the gear shaft. The gear meshes with the rack of the column. The gearbox is positioned and fixed with the gear shaft through a gear shaft positioning pin. The gearbox is positioned and fixed with the column through a V-shaped groove positioning screw. The dovetail bevel of the vertical fine adjustment block is inserted into the dovetail groove of the gearbox. The clamp is inserted into the vertical fine adjustment block. A steering positioning ball and a steering positioning spring are arranged between the vertical fine adjustment block and the clamp. A dial indicator is installed on the clamp through a copper head locking screw.

[0007] Moreover, the inspection table adjusting unit includes a rotating table, a longitudinal guide rail, a transverse guide rail, a guide rail connecting frame, an inspection table and a semi-circular arc inspection measuring block. Two of the longitudinal guide rails are installed in parallel on the rotating table. The guide rail connecting frame is installed at the upper end of the longitudinal guide rails. Two of the transverse guide rails are installed in parallel on the guide rail connecting frame. The inspection table is fixedly installed on the transverse guide rails. The semi-circular arc inspection measuring block is arranged on the inspection table. A turntable positioning ball and a turntable positioning spring are arranged between the rotating table and the base.

[0008] Moreover, the micrometer head clamping unit includes a micrometer head guide rail, a linear guide rail seat, a micrometer head backing plate, a micrometer head fixing frame and a micrometer head. The micrometer head guide rail is fixedly installed on the base. The linear guide rail seat is installed on the micrometer head guide rail. The micrometer head backing plate is fixedly installed on the linear guide rail seat. A T-shaped locking screw is inserted between the micrometer head backing plate and the base. A T-shaped screw locking nut is fixed at the upper end of the T-shaped locking screw. A micrometer head locking handle is installed on the side of the T-shaped screw locking nut. The micrometer head fixing frame is fixedly installed at the upper end of the micrometer head backing plate. The micrometer head is fixedly installed on the micrometer head fixing frame through a micrometer head locking screw.

[0009] Moreover, the vertical direction adjusting handle is connected to the gear shaft through a thread and is evenly distributed along a 120° circumference.

[0010] Moreover, a fine adjustment block baffle is installed on one side of the gearbox. A reset spring fixing pin is inserted into the fine adjustment block baffle. A reset spring is installed on the reset spring fixing pin.

[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 numerous functions, reasonable structure, convenient use and convenient operation. It preferably solves the problem of requiring multiple calibration instruments in the process of dial indicator calibration, reduces the input cost and increases the calibration efficiency.

[0013] 2. The inspection table adjustment unit of the present utility model adopts two groups of mutually perpendicular double guide rail mechanisms, making the movement more stable and precise.

[0014] 3. The base and the turntable of the present utility model are both provided with positioning holes, and precise positioning of the unloading turntable at mutually perpendicular positions is achieved through balls and springs.

[0015] 4. The movement of the differential head in the differential head clamping unit of the present utility model is installed on a double linear guide rail mechanism, ensuring flexible movement and precision. Description of the Drawings

[0016] Figure 1 is the front view of the present utility model for completing the metrological index verification of the influence of the radial force on the indicating value of the dial indicator measuring rod;

[0017] Figure 2 is Figure 1 the left view of

[0018] Figure 3 is Figure 1 the top view of

[0019] Figure 4 is Figure 1 the right view of

[0020] Figure 5 is the front view of the present utility model for completing the verification of indicating error and backlash error;

[0021] Figure 6 is Figure 5 the left view of

[0022] Figure 7 is the front view of the present utility model for completing the verification of measuring force.

[0023] Description of the Reference Numerals

[0024] 1. Base, 2. Rotary table, 3. Longitudinal guide rail, 4. Transverse guide rail, 5. Guide rail coupling frame, 6. Semi-circular calibration gauge block, 7. Column, 8. Copper head locking screw, 9. Gear shaft, 10. T-shaped locking screw, 11. Differential head locking handle, 12. Differential head backing plate, 13. T-shaped screw locking nut, 14. Differential head, 15. Differential head fixing frame, 16. Dynamometer, 17. V-shaped groove, 18. Inspection table, 19. Woodruff key, 20. Gear, 21. Steering positioning ball, 22. Steering positioning spring, 23. Vertical fine adjustment block, 24. Return spring fixing pin, 25. Return spring, 26. V-shaped groove positioning screw, 27. Snap ring, 28. Gear shaft positioning pin, 29. Rotary table positioning ball, 30. Rotary table positioning spring, 31. Dial indicator, 32. Vertical direction adjustment handle, 33. Gear box, 34. Linear guide rail seat, 35. Fine adjustment screw, 36. Fine adjustment block baffle, 37. Differential head guide rail, 38. Holder, 39. Differential head locking screw. Detailed implementation mode

[0025] 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.

[0026] A comprehensive dial indicator calibrator, the innovation of which lies in: including a base 1 and a dial indicator adjustment unit, an inspection table adjustment unit, a differential head clamping unit and a dynamometer 16 arranged on the base 1. A dial indicator 31 is installed on the dial indicator clamping unit, an inspection table 18 is arranged on the inspection table adjustment unit, a semi-circular calibration gauge block 6 is installed on the inspection table 18, and a differential head 14 is installed on the differential head clamping unit. The dial indicator adjustment unit adjusts the distance between the dial indicator 31 and the semi-circular calibration gauge block 6 to complete the calibration of the measurement index of the influence of the radial force on the indicating value of the two measuring rods of the dial indicator in two directions; the dial indicator adjustment unit adjusts the contact between the dial indicator 31 and the dynamometer 16 to complete the calibration of the measuring force; the dial indicator adjustment unit adjusts the relative position between the dial indicator 31 and the differential head 14 to complete the calibration of the indicating value error and the hysteresis error of the dial indicator.

[0027] The dial indicator adjusting unit includes a column 7, a gearbox 33, a gear shaft 9, a gear 20, a vertical fine adjustment block 23 and a clamp 38. A V-shaped groove 17 and a rack are provided on the column 7. The gear shaft 9 is inserted into the gearbox 33. A woodruff key 19, a gear 20 and a snap ring 27 are sequentially sleeved on the gear shaft 9. A vertical direction adjusting handle 32 is installed on the gear shaft 9. The gear 20 meshes with the rack of the column 7. The gearbox 33 is positioned and fixed with the gear shaft 9 through a gear shaft locating pin 28. The gearbox 33 is positioned and fixed with the column 7 through a V-shaped groove positioning screw 26. The dovetail inclined table of the vertical fine adjustment block 23 is inserted into the dovetail groove of the gearbox 33. The clamp 28 is inserted into the vertical fine adjustment block 23. Steering positioning balls 21 and a steering positioning spring 22 are arranged between the vertical fine adjustment block 23 and the clamp 28. A dial indicator 31 is installed on the clamp 28 through a brass head locking screw 8.

[0028] The inspection table adjusting unit includes a rotating table 2, a longitudinal guide rail 3, a transverse guide rail 4, a guide rail coupling frame 5, an inspection table 18 and a semi-circular arc inspection measuring block 6. Two of the longitudinal guide rails 3 are installed in parallel on the rotating table 2. The guide rail coupling frame 5 is installed at the upper end of the longitudinal guide rail 3. Two of the transverse guide rails 4 are installed in parallel on the guide rail coupling frame 5. The inspection table 18 is fixedly installed on the transverse guide rail 4. The semi-circular arc inspection measuring block 6 is arranged on the inspection table 18. Rotating table positioning balls 29 and a rotating table positioning spring 30 are arranged between the rotating table 2 and the base 1.

[0029] The micrometer head clamping unit includes a micrometer head guide rail 37, a linear guide rail seat 34, a micrometer head backing plate 12, a micrometer head fixing frame 15 and a micrometer head 14. The micrometer head guide rail 37 is fixedly installed on the base 1. The linear guide rail seat 34 is installed on the micrometer head guide rail 37. The micrometer head backing plate 12 is fixedly installed on the linear guide rail seat 34. A T-shaped locking screw 10 is inserted between the micrometer head backing plate 12 and the base 1. A T-shaped screw locking nut 13 is fixed at the upper end of the T-shaped locking screw 10. A micrometer head locking handle 11 is installed on the side of the T-shaped screw locking nut 13. The micrometer head fixing frame 15 is fixedly installed at the upper end of the micrometer head backing plate 12. The micrometer head 14 is fixedly installed on the micrometer head fixing frame 15 through a micrometer head locking screw 39.

[0030] The vertical direction adjusting handle 32 is connected to the gear shaft 9 through a thread and is evenly distributed along a 120° circumference.

[0031] A fine adjustment block baffle 36 is installed on one side of the gearbox 33. A reset spring fixing pin 24 is inserted into the fine adjustment block baffle 36. A reset spring 25 is installed on the reset spring fixing pin 24.

[0032] The working principle of the present utility model is as follows:

[0033] 1. Verification of the metrological index of the influence of the radial force on the indicating value of the dial indicator in two directions:

[0034] The column is fixed on the base by interference fit; there is a rack and two V-shaped grooves machined on the column respectively, and the rack and the two V-shaped grooves are distributed at intervals of 90° along the circumference; the gearbox is equipped with a gear and a gear shaft; the gearbox and the column are in a sliding clearance fit; the gear; the gear is fixed circumferentially on the gear shaft by a woodruff key; the gear is fixed axially on the gear shaft by a snap ring; the gear shaft is axially fixed in the gearbox by a gear shaft locating pin; the handle is connected to the gear shaft by a thread and is evenly distributed at 120° along the circumference; the rotary table and the base are in a rotatable clearance fit; the rotary table is equipped with a transverse guide rail, a guide rail connecting frame, a longitudinal guide rail and an inspection table; the transverse guide rail and the longitudinal guide rail are connected by the guide rail connecting frame, and the guide rail grooves of the guide rail connecting frame are distributed at 90°; there are two differential head guide rails installed on one side of the rotary table; there are guide rail sliders installed on the guide rails; the differential head gasket is fixed on the guide rail slider by an inner hexagon screw; the differential head is fixed on the differential head fixing frame and is fixed on the differential head backing plate by an inner hexagon screw; on the other side of the differential head guide rail is a precision dynamometer, which is fixed on the bottom plate by interference fit; the steering limit handwheel tightens the gripper on the vertical fine adjustment block through a reversing pull spring; the dial indicator is fixed on the gripper, the gear shaft is driven by the handle, and the dial indicator is moved along the direction of the column through the gear-rack transmission. When moving close to the arc measuring surface of the semi-circular block, lock the V-shaped groove positioning screw, fix the gearbox on the column, and precisely adjust the distance between the dial indicator probe and the semi-circular block through the fine adjustment screw. Through the mutual movement of the two groups of slide rails and the slide rail connecting frame, the transverse or longitudinal movement of the inspection table is realized, so as to verify the metrological index of the influence of the radial force on the indicating value of the dial indicator in two directions.

[0035] 2. Verification of the measuring force: Loosen the V-shaped groove positioning screw of the gearbox, rotate the gearbox 90° and lock the V-shaped groove positioning screw. At the same time, loosen the copper head locking screw, rotate the dial indicator 90° and lock the copper head locking screw. By adjusting the fine adjustment screw, adjust the dial indicator probe to contact the dynamometer probe to complete the verification operation of the measuring force.

[0036] 3. Verification of the indicating value error and hysteresis error of the dial indicator: Remove the rotary worktable, rotate the gearbox and the gripper so that the dial of the dial indicator faces up. At the same time, adjust the height so that the height of the dial indicator probe is close to the height of the differential head measuring surface. Lock the V-shaped groove positioning screw and lock the gearbox. Loosen the differential head locking handle, adjust the relative position between the differential barrel and the dial indicator probe, and lock the differential head locking handle to check the indicating value error and hysteresis error of the dial indicator.

[0037] The utility model has multiple functions, a reasonable structure, high positioning accuracy and high working efficiency, solves the disadvantages of single function or insufficient comprehensive performance of products on the market, greatly shortens the verification period and verification cost, and improves the verification efficiency of dial indicators.

[0038] Although embodiments and drawings of the utility model 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 utility model and the appended claims. Therefore, the scope of the utility model is not limited to the content disclosed in the embodiments and drawings.

Claims

1. A comprehensive tester for a dial indicator, characterized in that: The invention comprises a base (1) and a dial gauge adjustment unit, a test bench adjustment unit, a differential head clamping unit and a dynamometer (16) arranged on the base (1); a dial gauge (31) is installed on the dial gauge clamping unit; a test bench (18) is arranged on the test bench adjustment unit; a semicircular arc calibration block (6) is installed on the test bench (18); a differential head (14) is installed on the differential head clamping unit; the dial gauge adjustment unit adjusts the distance between the dial gauge (31) and the semicircular arc calibration block (6) to complete the calibration of the measurement index of the influence of the radial force of the measuring rod on the indication in two directions of the dial gauge; the dial gauge adjustment unit adjusts the contact between the dial gauge (31) and the dynamometer (16) to complete the calibration of the measuring force; the dial gauge adjustment unit adjusts the relative position between the dial gauge (31) and the differential head (14) to complete the calibration of the percentage indication value error and the return error.

2. The comprehensive tester for dial gauge according to claim 1, characterized in that: The dial indicator adjustment unit comprises a column (7), a gear box (33), a gear shaft (9), a gear (20), a vertical fine-motion adjustment block (23) and a clamp (38); the column (7) is provided with a V-shaped groove (17) and a rack; the gear shaft (9) is inserted into the gear box (33); a semicircular key (19), a gear (20) and a retaining ring (27) are sequentially mounted on the gear shaft (9); a vertical direction adjustment handle (32) is installed on the gear shaft (9); the gear (20) is meshed with the rack of the column (7); the gear box (33) is provided with a gear through the gear shaft (9); The shaft positioning pin (28) is positioned and fixed to the gear shaft (9); the gear box (33) is positioned and fixed to the column (7) by a V-groove positioning screw (26); the dovetail ramp of the vertical fine-motion adjustment block (23) is inserted into the dovetail groove of the gear box (33); the clamp (38) is inserted into the vertical fine-motion adjustment block (23); a steering positioning ball (21) and a steering positioning spring (22) are arranged between the vertical fine-motion adjustment block (23) and the clamp (38); a dial indicator (31) is installed on the clamp (38) by a copper head locking screw (8).

3. The comprehensive tester for dial gauge according to claim 1, characterized in that: The inspection table adjustment unit comprises a rotating table (2), a longitudinal guide rail (3), a transverse guide rail (4), a guide rail connecting frame (5), an inspection table (18) and a semi-circular arc calibration block (6); the rotating table (2) is provided with two longitudinal guide rails (3) installed in parallel; the guide rail connecting frame (5) is installed on the upper end of the longitudinal guide rail (3); the guide rail connecting frame (5) is provided with two transverse guide rails (4) installed in parallel on the guide rail connecting frame (5); the inspection table (18) is fixedly installed on the transverse guide rail (4); and the semi-circular arc calibration block (6) is provided on the inspection table (18); a turntable positioning ball (29) and a turntable positioning spring (30) are provided between the rotating table (2) and the base (1).

4. The comprehensive tester for dial gauge according to claim 1, characterized in that: The micrometer head clamping unit comprises a micrometer head guide rail (37), a linear guide rail seat (34), a micrometer head pad (12), a micrometer head fixing frame (15) and a micrometer head (14); the micrometer head guide rail (37) is fixedly mounted on the base (1); the linear guide rail seat (34) is mounted on the micrometer head guide rail (37); the micrometer head pad (12) is fixedly mounted on the linear guide rail seat (34); the micrometer head pad (12) is fixedly mounted on the micrometer head ) and the base (1), a T-shaped locking screw (10) is passed through, a T-shaped screw locking nut (13) is fixed to the upper end of the T-shaped locking screw (10), a differential head locking handle (11) is installed on the side of the T-shaped screw locking nut (13), a differential head fixing frame (15) is fixedly installed on the upper end of the differential head pad (12), and a differential head (14) is fixedly installed on the differential head fixing frame (15) via a differential head locking screw (39).

5. The comprehensive tester for dial gauge according to claim 2, characterized in that: The vertical direction adjustment handle (32) is connected to the gear shaft (9) through threads and is evenly distributed along the circumference of 120°.

6. The comprehensive tester for dial gauge according to claim 2, characterized in that: A fine-motion adjustment block baffle (36) is installed on one side of the gear box (33), a reset spring fixing pin (24) is inserted on the fine-motion adjustment block baffle (36), and a reset spring (25) is installed on the reset spring fixing pin (24).

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