CN112229290A - Vernier caliper for measuring aperture of taper hole and measuring method - Google Patents
Vernier caliper for measuring aperture of taper hole and measuring method Download PDFInfo
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- CN112229290A CN112229290A CN202010355165.6A CN202010355165A CN112229290A CN 112229290 A CN112229290 A CN 112229290A CN 202010355165 A CN202010355165 A CN 202010355165A CN 112229290 A CN112229290 A CN 112229290A
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- measuring
- vernier
- diameter
- vernier caliper
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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
- G01B3/20—Slide gauges
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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
- G01B5/08—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters
- G01B5/12—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters internal diameters
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- General Physics & Mathematics (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
The invention discloses a vernier caliper for measuring the diameter of a taper hole and a measuring method, wherein the vernier caliper comprises a main scale and a vernier scale, scales are arranged on the main scale and the vernier scale, measuring heads are respectively arranged at the upper part and the lower part of a scale body and the vernier, a caliper measuring blade at the end part of the measuring head at the lower part is arranged at the outer side of the measuring head, the inclination angle of the caliper measuring blade is matched with a chamfer angle of the taper hole diameter of a workpiece to be measured, during measurement, a caliper measuring reference surface is attached to the diameter hole end surface of the workpiece, and meanwhile, the caliper measuring blade is attached to. The invention has the beneficial effects that: the vernier caliper is modified to measure the aperture of the taper hole. The problem that the diameter of the orifice of the conical hole can only be accurately measured by a three-coordinate measuring instrument in the machining industry is solved.
Description
Technical Field
The invention relates to the field of machining and measurement, in particular to a vernier caliper and a method for measuring the aperture of a taper hole.
Background
In the processing of the hydraulic pump and the hydraulic motor shell, the oil inlet and the oil outlet are required to have good sealing function, so that the oil inlet and the oil outlet are designed to be arranged in special holes with 15-degree and 45-degree chamfers, as shown in the attached figures 1 and 2. The oil port and orifice sealing structure consists of two parts, namely a 15-degree taper hole and a 45-degree taper hole. The method for processing the oil port comprises the following steps: at present, the hole processing tool with multiple blades is mostly adopted and formed by profiling processing, and the shapes of two parts, namely a 15-degree taper hole and a 45-degree taper hole, are directly ensured.
There are problems in that: the measurement difficulty of the size of the distance phi P from the chamfer diameter A point to the chamfer diameter B point of the oil port hole is higher.
There are two types of current measurement methods:
one is measurement on a three coordinate measuring machine. Its advantages are high measuring precision and no need of measuring workpiece in machining site.
And secondly, measuring the workpiece on site by using a vernier caliper. Its advantage is that it can be measured in field, and its disadvantage is that the point A and point B of the hole are difficult to be accurately clamped by the tip of the caliper, so that its measurement error is very large. As shown in fig. 3.
Disclosure of Invention
In order to overcome the defects, the invention provides a novel vernier caliper structure for measuring the aperture of the taper hole and a measuring method, and changes the original state that the size of the chamfer of the hole opening cannot be accurately measured by using the vernier caliper.
The technical scheme adopted by the invention for realizing the purpose is as follows: the vernier caliper for measuring the taper hole aperture comprises a main scale and a vernier scale, wherein scales are arranged on the main scale and the vernier scale, measuring heads are arranged on the upper portion and the lower portion of a scale body and the vernier scale, a measuring blade of the end part of the measuring head is arranged on the outer side of the measuring head, the inclination angle of the measuring blade of the vernier caliper is matched with the chamfer of the taper hole aperture of a workpiece to be measured, during measurement, the diameter hole end face of the real workpiece is attached to a measuring reference surface of the vernier caliper, and the measuring blade of the vernier caliper is attached to the taper. The upper part of the vernier is provided with a fastening screw which can fix the vernier at any position on the ruler body. The vernier may be a digital display vernier.
The measuring method of the scale vernier caliper comprises the following steps:
1) firstly, a 'standard block' is made: wherein P' = P +/-0.01 mm of the standard block, and P is a theoretical median of the chamfer diameter of the oil port of the measured workpiece; the P' value of the standard block is measured by a three-coordinate measuring instrument during processing;
2) the vernier caliper of the structure is used for measuring a standard block, and the diameter value of the standard block is read from the vernier caliper: l is
3) Measuring the measured workpiece, reading the value from the vernier caliper: n is a radical of
4) And measuring and calculating results, wherein the measured value of the chamfer diameter of the oil port orifice is set as: c, then C = N-L;
5) whether the oil port orifice chamfer diameter of the measured workpiece is qualified or not is judged:
when the (P-0.1) mm is not less than C and not more than (P +0.1) mm, the diameter of the chamfer of the oil port opening of the measured workpiece is qualified; otherwise, the measured workpiece is unqualified.
The measuring method of the digital display vernier comprises the following steps:
1) firstly, a 'standard block' is manufactured, wherein P '= P +/-0.01 mm of the' standard block ', P is a theoretical median of the chamfer diameter of an oil port hole of a measured workpiece, and the value of P' of the 'standard block' is measured by a three-coordinate measuring instrument during processing.
2) The digital display vernier caliper with the structure is used for measuring a standard block, and the measuring result is returned to 0;
3) measuring the workpiece to be measured, and setting the measurement result as follows: x;
4) whether the oil port orifice chamfer diameter of the measured workpiece is qualified or not is judged:
when x is more than or equal to-0.1 mm and less than or equal to +0.1mm, the diameter of the chamfer angle of the oil port opening of the measured workpiece is qualified; otherwise, the measured workpiece is unqualified.
The invention has the beneficial effects that: the vernier caliper is modified to measure the aperture of the taper hole. The problem that the diameter of the orifice of the conical hole can only be accurately measured by a three-coordinate measuring instrument in the machining industry is solved.
Drawings
Fig. 1 is a structural view of an oil inlet and an oil outlet of a hydraulic pump or a hydraulic motor.
Fig. 2 is a partially enlarged view of fig. 1.
Fig. 3 is a measurement state diagram of a conventional vernier caliper.
FIG. 4 is a view showing the construction of the vernier caliper of the present invention.
Fig. 5 is a partially enlarged view of fig. 4.
Fig. 6 is a standard block diagram.
FIG. 7 is a state diagram of a vernier caliper measurement standard block.
FIG. 8 is a state diagram of a digital vernier caliper measurement standard block.
FIG. 9 is a state diagram of the vernier caliper for measuring the workpiece.
FIG. 10 is a diagram showing the state of the digital vernier caliper for measuring the workpiece.
Detailed Description
The invention will be further illustrated with reference to specific examples.
As shown in fig. 4-5, the vernier caliper for measuring the aperture of the taper hole comprises a main scale 1 and a vernier scale 2, wherein scales are arranged on the main scale and the vernier scale, measuring heads 4 are arranged above and below a scale body and the vernier, a measuring blade 5 of the end part caliper of the measuring head at the lower part is arranged outside the measuring head, the inclination angle of the measuring blade 5 of the vernier caliper is matched with the chamfer of the taper hole aperture of the workpiece to be measured, during measurement, a measuring reference surface 6 of the vernier caliper is attached to the diameter hole end surface 7 of the measured workpiece, and meanwhile, the measuring blade 5 of the vernier caliper is attached to the taper hole. The upper part of the vernier is provided with a fastening screw 3 which can fix the vernier at any position on the ruler body. The vernier may be a digital display vernier. During measurement, a caliper measuring reference surface 6 of the caliper is attached to an orifice end surface 7 of a measured workpiece diameter of the workpiece, a caliper vernier is pulled, when an a point of the caliper is superposed with an A point of the workpiece, and a B point of the caliper is superposed with a B point of the workpiece, a measurement result value is obtained.
1. Measurement:
(1) and processing the standard block. The standard measurement P' is equal to the median diameter size of the measured cone, as (fig. 6):
(2) and measuring the standard block. Slide caliper see (figure 7) and digital display slide caliper see (figure 8)
(3) And measuring the workpiece to be measured, see (fig. 9) and (fig. 10).
2. And (3) measurement result calculation:
for (fig. 6), the measured value of the "oil port orifice chamfer diameter" measured by the improved vernier caliper for measuring the taper hole aperture is: c
Then, C = N-L (either positive or negative number possible)
Caliper reading value of N-vernier caliper measuring workpiece
L-square calliper for measuring "standard block" reading
Secondly, for the pair (fig. 10), the measured value of the improved digital display vernier caliper for measuring the aperture of the taper hole for measuring the chamfer diameter of the oil port is as follows: x.
3. Whether the oil port orifice chamfer diameter of the measured workpiece is qualified or not is judged:
a vernier caliper is calibrated: when the (P-0.1) mm is not less than C and not more than (P +0.1) mm, the diameter of the chamfer of the oil port opening of the measured workpiece is qualified; otherwise, the measured workpiece is unqualified;
digital display slide caliper: when x is more than or equal to-0.1 mm and less than or equal to +0.1mm, the diameter of the chamfer angle of the oil port opening of the measured workpiece is qualified; otherwise, the measured workpiece is unqualified.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and their concepts should be equivalent or changed within the technical scope of the present invention.
Claims (5)
1. The vernier caliper for measuring the taper hole aperture comprises a main scale and a vernier scale, wherein the main scale and the vernier scale are provided with scales, measuring heads are arranged on a scale body and a vernier vertically, and the vernier caliper is characterized in that a measuring blade of the end part of the measuring head at the lower part is arranged outside the measuring head, the inclination angle of the measuring blade of the vernier caliper is matched with the chamfer of the taper hole aperture of a workpiece to be measured, during measurement, the diameter hole end face of the real workpiece is attached to a measuring reference surface of the vernier caliper, and the measuring blade of the vernier caliper is attached to the taper hole shape of the.
2. The vernier caliper for measuring the diameter of a taper hole as claimed in claim 1, wherein a fastening screw is provided on the upper portion of the vernier to fix the vernier at any position on the body.
3. The vernier caliper for measuring the diameter of a tapered hole according to claim 1, wherein the vernier is a digital display vernier.
4. A method of measuring a vernier caliper according to claim 1 or 2, characterized by the steps of:
1) firstly, a 'standard block' is made: wherein P' = P +/-0.01 mm of the standard block, and P is a theoretical median of the chamfer diameter of the oil port of the measured workpiece; the P' value of the standard block is measured by a three-coordinate measuring instrument during processing;
2) the vernier caliper of the structure is used for measuring a standard block, and the diameter value of the standard block is read from the vernier caliper: l is
3) Measuring the measured workpiece, reading the value from the vernier caliper: n is a radical of
4) And measuring and calculating results, wherein the measured value of the chamfer diameter of the oil port orifice is set as: c, then C = N-L;
5) whether the oil port orifice chamfer diameter of the measured workpiece is qualified or not is judged:
when the (P-0.1) mm is not less than C and not more than (P +0.1) mm, the diameter of the chamfer of the oil port opening of the measured workpiece is qualified; otherwise, the measured workpiece is unqualified.
5. A method of measuring a vernier caliper according to claim 1 or 3, characterized by the steps of:
1) firstly, a 'standard block' is manufactured, wherein P '= P +/-0.01 mm of the' standard block ', P is a theoretical median of the chamfer diameter of an oil port of a measured workpiece, and the value P' of the 'standard block' is measured by a three-coordinate measuring instrument during processing;
2) the digital display vernier caliper with the structure is used for measuring a standard block, and the measuring result is returned to 0;
3) measuring the workpiece to be measured, and setting the measurement result as follows: x;
4) whether the oil port orifice chamfer diameter of the measured workpiece is qualified or not is judged:
when x is more than or equal to-0.1 mm and less than or equal to +0.1mm, the diameter of the chamfer angle of the oil port opening of the measured workpiece is qualified; otherwise, the measured workpiece is unqualified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010355165.6A CN112229290A (en) | 2020-04-29 | 2020-04-29 | Vernier caliper for measuring aperture of taper hole and measuring method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010355165.6A CN112229290A (en) | 2020-04-29 | 2020-04-29 | Vernier caliper for measuring aperture of taper hole and measuring method |
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| Publication Number | Publication Date |
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| CN112229290A true CN112229290A (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010355165.6A Pending CN112229290A (en) | 2020-04-29 | 2020-04-29 | Vernier caliper for measuring aperture of taper hole and measuring method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2578782Y (en) * | 2002-09-29 | 2003-10-08 | 上海汽轮机有限公司 | Conic hole diameter square caliper |
| CN101551222A (en) * | 2008-04-03 | 2009-10-07 | 力帆实业(集团)股份有限公司 | Method for measuring diameter of ring groove |
| CN204806995U (en) * | 2015-05-27 | 2015-11-25 | 靖江量具有限公司 | Electronic digital display caliper is measured to constant force |
| CN208736316U (en) * | 2018-08-08 | 2019-04-12 | 鹰普航空零部件（无锡）有限公司 | A kind of cubing of quick inspection chamfering tangential dimension |
| CN208921022U (en) * | 2018-11-20 | 2019-05-31 | 河南中原特钢装备制造有限公司 | A kind of taper hole diameter measurement vernier caliper |
-
2020
- 2020-04-29 CN CN202010355165.6A patent/CN112229290A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2578782Y (en) * | 2002-09-29 | 2003-10-08 | 上海汽轮机有限公司 | Conic hole diameter square caliper |
| CN101551222A (en) * | 2008-04-03 | 2009-10-07 | 力帆实业(集团)股份有限公司 | Method for measuring diameter of ring groove |
| CN204806995U (en) * | 2015-05-27 | 2015-11-25 | 靖江量具有限公司 | Electronic digital display caliper is measured to constant force |
| CN208736316U (en) * | 2018-08-08 | 2019-04-12 | 鹰普航空零部件（无锡）有限公司 | A kind of cubing of quick inspection chamfering tangential dimension |
| CN208921022U (en) * | 2018-11-20 | 2019-05-31 | 河南中原特钢装备制造有限公司 | A kind of taper hole diameter measurement vernier caliper |
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Application publication date: 20210115 |