CN111981958A - Special detection tool for detecting depth micrometer and detection method - Google Patents
Special detection tool for detecting depth micrometer and detection method Download PDFInfo
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- CN111981958A CN111981958A CN202010864715.7A CN202010864715A CN111981958A CN 111981958 A CN111981958 A CN 111981958A CN 202010864715 A CN202010864715 A CN 202010864715A CN 111981958 A CN111981958 A CN 111981958A
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- measuring
- depth micrometer
- micrometer
- depth
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B3/00—Measuring instruments characterised by the use of mechanical techniques
- G01B3/18—Micrometers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/18—Measuring arrangements characterised by the use of mechanical techniques for measuring depth
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- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
A special detection tool for detecting a depth micrometer and a detection method thereof are disclosed, wherein the special detection tool for detecting the depth micrometer comprises a rectangular measuring block and a standard steel ball; the rectangular measuring block is provided with a plurality of groups of circular grooves with different sizes and specifications on the outer surface, and the bottom surfaces of the circular grooves are spherical cambered surfaces; the standard steel balls are provided with a plurality of groups, and the diameter sizes of the standard steel balls correspond to the circular grooves with different sizes and specifications respectively; the roughness Ra of the outer surface of the rectangular measuring block, the bottom surface of the circular groove and the surface of the standard steel ball is less than 0.1 mm. According to the invention, through the design of the combined structure of the standard measuring block and the standard steel ball, a method for detecting the parallelism between the measuring surface of the bottom plate of the depth micrometer and the measuring surface of the measuring rod is created, and the purposes of ensuring the accuracy of the detection result and improving the working efficiency are achieved.
Description
Technical Field
The invention relates to a detection tool and a detection method, in particular to a special detection tool and a detection method for detecting the parallelism of a measuring surface of a measuring rod and a measuring surface of a bottom plate of a depth micrometer in the detection process of the depth micrometer.
Background
As shown in the attached figure 1, a depth micrometer 1 is an instrument for measuring the distance between a bottom plate measuring surface and a measuring rod measuring surface by using a screw pair principle, consists of a micro-cylinder 1-1, a fixed sleeve 1-2, a measuring rod 1-3, a bottom plate 1-4, a locking device 1-5 and other parts, and is mainly used for measuring the depth, the step size and other dimensions of a precision workpiece in the machining process. For the depth micrometer with the measuring surfaces of the measuring rods 1-3 being planes, because the parallelism between the measuring surfaces of the bottom plates 1-4 and the measuring surfaces of the measuring rods 1-3 has a great influence on the accuracy of the measuring result, in the national standard calibration regulation aiming at the depth micrometer, the parallelism detection between the measuring surfaces of the measuring rods and the measuring surfaces of the bottom plates is listed as a necessary item and is used as a calibration negative item, namely: if the item is determined to be unqualified, the whole micrometer is scrapped.
In the national standard calibration regulation, the parallelism detection of the measuring surface of the measuring rod and the measuring surface of the bottom plate adopts a standard steel ball detection mode, by changing the position of the steel ball 3, different positions of the measuring surface of the measuring rod 1-1 in the depth micrometer 1 are contacted with the standard steel ball 3, thereby obtaining a group of measurement data, comparing the measurement data with the diameter size of the standard steel ball 3 to obtain the parallelism deviation between the measurement surface of the measurement rod 1-1 of the depth micrometer and the measurement surface of the bottom plate 1-2, because the steel ball 3 is directly placed on the platform 4 in the detection process and is extremely easy to roll back and forth, the position of the steel ball 3 is difficult to control, the working efficiency is low, and the platform 4 is easy to scratch, and the requirement on the roughness of the surface of the platform 4 in the standard detection procedure is very high, and the measurement standard can be misaligned after the platform 4 is scratched, so that the detection result is poor in accuracy.
Disclosure of Invention
The invention provides a special detection tool and a detection method for detecting a depth micrometer, and aims to creatively provide a detection method for parallelism between a measuring surface of a bottom plate of the depth micrometer and a measuring surface of a measuring rod through the design of a combined structure of a standard measuring block and a standard steel ball, so as to achieve the purposes of ensuring the accuracy of a detection result and improving the working efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme:
a special detection tool for detecting a depth micrometer comprises a rectangular measuring block and a standard steel ball; the rectangular measuring block is provided with a plurality of groups of circular grooves with different sizes and specifications on the outer surface, and the bottom surfaces of the circular grooves are spherical cambered surfaces; the standard steel balls are provided with a plurality of groups, and the diameter sizes of the standard steel balls correspond to the circular grooves with different sizes and specifications respectively; the roughness Ra of the outer surface of the rectangular measuring block, the bottom surface of the circular groove and the surface of the standard steel ball is less than 0.1 mm.
The special detection tool for detecting the depth micrometer is characterized in that an anti-skidding structure is arranged on the side vertical surface of the rectangular measuring block.
The special detection tool for detecting the depth micrometer is characterized in that the anti-skid structures are anti-skid long grooves penetrating through the upper end face and the bottom face, and the number of the anti-skid long grooves is not less than two.
The special detection tool for detecting the depth micrometer is characterized in that the anti-skid structure is a group of circular grooves which are linearly arranged along the vertical axis direction.
A depth micrometer calibration method adopts the special gauge to complete the detection of the parallelism of a measuring rod measuring surface and a bottom plate measuring surface of a depth micrometer, and comprises the following steps:
a. positioning the depth micrometer, namely firstly selecting two measuring blocks with the size specification matched with the measuring range of the depth micrometer to be detected, placing the two measuring blocks on a flat plate in parallel, and then carrying a bottom plate of the detected depth micrometer on the two measuring blocks to ensure that the measuring surface of the bottom plate of the depth micrometer is attached to the upper end surfaces of the two measuring blocks;
b. selecting a circular groove and a standard steel ball on a rectangular measuring block, and selecting the circular groove and the standard steel ball of a certain size specification on the rectangular measuring block according to the measuring range of the depth micrometer to be detected;
c. making one side of the rectangular measuring block provided with the circular groove with the selected size specification face upwards, and placing the rectangular measuring block and the standard steel ball between two measuring blocks on the flat plate after placing the selected standard steel ball in the circular groove with the selected size specification;
d. moving the rectangular measuring block to enable the standard steel ball to be in contact with four points at the front, rear, left and right positions of the measuring surface of the measuring rod of the micrometer to be detected respectively, and reading the readings of the four measuring points respectively;
e. calculating the difference value between the maximum value and the minimum value in the readings of the four measuring points;
f. repeating the step d and the step e, calculating an average value of the difference value between the maximum value and the minimum value, and correcting the average value to obtain a parallelism value of the measuring surface of the measuring rod and the measuring surface of the bottom plate of the micrometer with the detected depth;
g. and comparing the parallelism value of the measuring surface of the measuring rod and the measuring surface of the bottom plate of the depth micrometer to be detected with a standard set value, judging whether the depth micrometer to be detected is qualified or not, and finishing the verification process of the depth micrometer.
According to the method for calibrating the depth micrometer, the environment temperature is 20 +/-5 ℃ when the parallelism of the measuring surface of the measuring rod and the measuring surface of the bottom plate of the depth micrometer is detected.
In the method for calibrating the depth micrometer, in the step a, the two measuring blocks are positioned at the positions 3-5mm away from the edge of the measuring surface of the bottom plate of the depth micrometer to be calibrated.
In the method for calibrating the depth micrometer, in the step f, the number of repeated measurements is ten.
The invention provides a special detection tool for detecting a depth micrometer and a detection method, wherein in the special detection tool for detecting the depth micrometer, the diameter of a circular groove arranged on the outer surface of a rectangular measuring block is slightly larger than the diameter of a standard steel ball with the corresponding diameter size, so that the standard steel ball can rotate in the circular groove, the self-centering action of the standard steel ball is realized, the consistency of the height of a contact point of the standard steel ball and the measuring surface of a measuring rod of the depth micrometer in the measuring process is ensured, and the accuracy of a measuring result is ensured; the roughness Ra of the outer surface of the rectangular measuring block, the bottom surface of the groove and the surface of the standard steel ball of the special detection tool for detecting the depth micrometer is less than 0.1mm, so that when the parallelism of the measuring surface of the measuring rod of the depth micrometer and the measuring surface of the bottom plate is detected, the special detection tool can be placed between the flat plate and the measuring surface of the measuring rod, the position of the standard steel ball can be limited, an operator can independently complete a detection item, and a measurement error caused by the sliding of the steel ball on the flat plate is avoided; in addition, the anti-skidding structure is arranged on the side vertical surface of the rectangular measuring block in the special checking tool for calibrating the depth micrometer, so that the problem that the rectangular measuring block falls off and scratches a flat plate when placed due to the fact that an operator slips by hands is solved, the flatness of a measuring reference is guaranteed, and particularly, a group of circular grooves which are linearly arranged are used as the anti-skidding structure, so that the anti-skidding structure not only has an anti-skidding function, but also can be used for positioning steel balls with certain diameter sizes, and the universality of the anti-skidding structure is enhanced. In conclusion, the invention innovatively discloses a method for detecting the parallelism between the measuring surface of the bottom plate of the depth micrometer and the measuring surface of the measuring rod through the design of the combined structure of the standard measuring block and the standard steel ball, and achieves the purposes of ensuring the accuracy of the detection result and improving the working efficiency.
Drawings
FIG. 1 is a schematic diagram of a standard calibration protocol for a depth micrometer;
FIG. 2 is a schematic structural view of a special gauge for calibrating a depth micrometer according to the present invention;
FIG. 3 is a schematic diagram of the exploded structure of FIG. 2;
FIG. 4 is a schematic sectional structure view of a special gauge for calibrating a depth micrometer;
FIG. 5 is a view from direction K of FIG. 2;
FIG. 6 is a schematic view of the working state of the special detection tool for detecting the depth micrometer.
The list of labels in the figure is:
1. 1-1 parts of a depth micrometer, 1-2 parts of a micro-cylinder, 1-3 parts of a fixed sleeve, 1-4 parts of a measuring rod, 1-5 parts of a bottom plate and a locking device;
2. measuring blocks;
3. standard steel balls;
4. a flat plate;
5. 5-1 parts of rectangular measuring blocks, 5-2 parts of circular grooves and 5-2 parts of anti-skidding long grooves.
Detailed Description
The invention provides a special detection tool and a detection method for calibrating a depth micrometer, in particular to a special detection tool and a calibration method for detecting the parallelism of a measuring surface of a measuring rod and a measuring surface of a bottom plate in the process of calibrating the depth micrometer, and the invention is further explained by combining the attached drawings and specific embodiments.
Referring to fig. 2, 3, 4 and 5, the special detection tool for detecting the depth micrometer comprises a rectangular measuring block 5 and a standard steel ball 3; the rectangular measuring block 5 is provided with a plurality of groups of circular grooves 5-1 with different sizes and specifications on the outer surface, and the bottom surfaces of the circular grooves 5-1 are spherical cambered surfaces; the standard steel balls 3 are configured into a plurality of groups, and the diameter sizes of the standard steel balls are respectively corresponding to the circular grooves 5-1 with different sizes and specifications; the roughness Ra of the outer surface of the rectangular measuring block 5, the bottom surface of the circular groove 5-1 and the surface of the standard steel ball 3 is less than 0.1 mm.
Referring to fig. 2 and 3, in the special detection tool for detecting the depth micrometer, an anti-skid structure is arranged on a side elevation of the rectangular measuring block 5; the first preferred embodiment of the anti-skid structure is anti-skid long grooves 5-2 penetrating through the upper end surface and the bottom surface, and the number of the anti-skid long grooves 5-2 is not less than two.
Referring to fig. 2 and 5, a second preferred embodiment of the anti-slip structure of the special gauge for calibrating a depth micrometer according to the present invention is that a group of circular grooves are linearly arranged along a vertical axis.
Referring to fig. 1, in the national standard calibration rule for the depth micrometer, the parallelism detection of the measuring surface of the measuring rod and the measuring surface of the bottom plate adopts a standard steel ball detection mode, namely, the position of the steel ball 3 is changed to enable different positions of the measuring surface of the measuring rod 1-1 in the depth micrometer 1 to be in contact with the standard steel ball 3, so as to obtain a group of measuring data, the measuring data is compared with the diameter size of the standard steel ball 3 to obtain the parallelism deviation of the measuring surface of the measuring rod 1-1 and the measuring surface of the bottom plate 1-2 of the depth micrometer, because the steel ball 3 is directly placed on the platform 4 in the detection process, the steel ball 3 is easy to roll back and forth, the position of the steel ball 3 is difficult to control, the working efficiency is low, the platform 4 is easy to scratch, the requirement on the roughness of the surface of the platform 4 in the standard detection rule is high, and the measuring, resulting in poor accuracy of the detection result.
Referring to fig. 6, the method for calibrating the depth micrometer of the present invention adopts the special fixture for calibrating the depth micrometer to complete the parallelism detection between the measuring surface of the measuring rod 1-3 and the measuring surface of the bottom plate 1-4 of the depth micrometer 1, controls the environmental temperature of the depth micrometer when detecting the parallelism between the measuring surface of the measuring rod and the measuring surface of the bottom plate to be 20 ± 5 ℃, and comprises the following specific operation steps:
a. positioning the depth micrometer, namely firstly selecting two measuring blocks 2 with the size specification matched with the measuring range of the depth micrometer to be detected, placing the two measuring blocks 2 on a flat plate 4 in parallel, and then carrying a bottom plate 1-4 of the detected depth micrometer 1 on the two measuring blocks 2 to ensure that the measuring surfaces 1-4 of the bottom plate 1 of the depth micrometer 1 are attached to the upper end surfaces of the two measuring blocks 2, wherein the two measuring blocks 2 are positioned at the positions 3-5mm away from the edges of the measuring surfaces 1-4 of the bottom plate 1 of the detected depth micrometer 1;
b. selecting a circular groove 5-1 and a standard steel ball 3 on a rectangular measuring block 5, and selecting the circular groove 5-1 and the standard steel ball 3 of a certain size specification on the rectangular measuring block 5 according to the measuring range of the depth micrometer 1 to be detected;
c. one surface of the rectangular measuring block 5 provided with the circular groove with the selected dimension is upward, and after the selected standard steel ball 3 is placed in the circular groove 5-1 with the selected dimension, the rectangular measuring block 5 and the standard steel ball 3 are placed between the two measuring blocks 2 on the flat plate 4;
d. moving a rectangular measuring block 5 to enable a standard steel ball 3 to be respectively in contact with four points at the front, rear, left and right positions of the measuring surface of a measuring rod 1-3 of the micrometer 1 to be detected, and respectively reading the readings of the four measuring points;
e. calculating the difference value between the maximum value and the minimum value in the readings of the four measuring points;
f. repeating the step d and the step e for ten times, calculating an average value of the difference value between the maximum value and the minimum value, and correcting the average value to obtain a parallelism value of the measuring surface of the measuring rod and the measuring surface of the bottom plate of the tested depth micrometer;
g. and comparing the parallelism value of the measuring surface of the measuring rod and the measuring surface of the bottom plate of the depth micrometer to be detected with a standard set value, judging whether the detected depth micrometer 1 is qualified or not, and finishing the verification process of the depth micrometer.
Claims (8)
1. A special detection tool for detecting a depth micrometer is characterized by comprising a rectangular measuring block (5) and a standard steel ball (3); the rectangular measuring block (5) is provided with a plurality of groups of circular grooves (5-1) with different dimensions on the outer surface, and the bottom surfaces of the circular grooves (5-1) are spherical cambered surfaces; the standard steel balls (3) are configured into a plurality of groups, and the diameter sizes of the standard steel balls correspond to the circular grooves (5-1) with different sizes and specifications respectively; the roughness Ra of the outer surface of the rectangular measuring block (5), the bottom surface of the circular groove (5-1) and the surface of the standard steel ball (3) is less than 0.1 mm.
2. The special detection tool for detecting the depth micrometer as claimed in claim 1, wherein an anti-skid structure is arranged on the side vertical surface of the rectangular measuring block (5).
3. The special detection tool for detecting the depth micrometer as claimed in claim 2, wherein the anti-skid structures are anti-skid long grooves (5-2) penetrating through the upper end surface and the bottom surface, and the number of the anti-skid long grooves (5-2) is not less than two.
4. The special detection tool for detecting the depth micrometer as claimed in claim 2, wherein the anti-slip structure is a group of circular grooves which are linearly arranged along a vertical axis.
5. A method for calibrating a depth micrometer, which adopts the special detection tool for calibrating the depth micrometer as claimed in any one of claims 1 to 4 to complete the detection of the parallelism of the measuring surface of the measuring rod (1-3) and the measuring surface of the bottom plate (1-4) of the depth micrometer (1), and comprises the following steps:
a. positioning the depth micrometer, namely firstly selecting two measuring blocks (2) with the size specification matched with the measuring range of the depth micrometer to be detected, placing the two measuring blocks (2) on a flat plate (4) in parallel, and then loading a bottom plate (1-4) of the detected depth micrometer (1) on the two measuring blocks (2) to ensure that the measuring surface of the bottom plate (1-4) of the depth micrometer (1) is attached to the upper end surfaces of the two measuring blocks (2);
b. selecting a circular groove (5-1) and a standard steel ball (3) on a rectangular measuring block (5), and selecting the circular groove (5-1) and the standard steel ball (3) with a certain size specification on the rectangular measuring block (5) according to the measuring range of the detected depth micrometer (1);
c. one surface of the rectangular measuring block (5) provided with the circular groove with the selected size specification faces upwards, and after the selected standard steel ball (3) is placed in the circular groove (5-1) with the selected size specification, the rectangular measuring block (5) and the standard steel ball (3) are placed between the two measuring blocks (2) on the flat plate (4);
d. moving a rectangular measuring block (5) to enable a standard steel ball (3) to be in contact with four points at the front, rear, left and right positions of the measuring surface of a measuring rod (1-3) of the micrometer (1) to be detected respectively, and reading the readings of the four measuring points respectively;
e. calculating the difference value between the maximum value and the minimum value in the readings of the four measuring points;
f. repeating the step d and the step e, calculating an average value of the difference value between the maximum value and the minimum value, and correcting the average value to obtain a parallelism value of the measuring surface of the measuring rod and the measuring surface of the bottom plate of the micrometer with the detected depth;
g. and comparing the parallelism value of the measuring surface of the measuring rod and the measuring surface of the bottom plate of the depth micrometer to be detected with a standard set value, judging whether the detected depth micrometer (1) is qualified or not, and finishing the verification process of the depth micrometer.
6. The method for calibrating the depth micrometer according to claim 5, wherein the environment temperature for detecting the parallelism of the measuring surface of the measuring rod and the measuring surface of the bottom plate of the depth micrometer is 20 ± 5 ℃.
7. The method for calibrating the depth micrometer according to claim 6, wherein in the step a, the two gauge blocks (2) are positioned at a distance of 3-5mm from the edge of the measuring surface of the bottom plate (1-4) of the depth micrometer (1) to be calibrated.
8. The method of calibrating a depth micrometer according to claim 6, wherein in the step f, the number of repeated measurements is ten.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010864715.7A CN111981958A (en) | 2020-08-25 | 2020-08-25 | Special detection tool for detecting depth micrometer and detection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010864715.7A CN111981958A (en) | 2020-08-25 | 2020-08-25 | Special detection tool for detecting depth micrometer and detection method |
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| Publication Number | Publication Date |
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| CN111981958A true CN111981958A (en) | 2020-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010864715.7A Pending CN111981958A (en) | 2020-08-25 | 2020-08-25 | Special detection tool for detecting depth micrometer and detection method |
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| CN (1) | CN111981958A (en) |
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2020
- 2020-08-25 CN CN202010864715.7A patent/CN111981958A/en active Pending
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