CN110553611A - tool normal hole position degree detection method based on three-coordinate measuring machine - Google Patents
tool normal hole position degree detection method based on three-coordinate measuring machine Download PDFInfo
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- CN110553611A CN110553611A CN201910692785.6A CN201910692785A CN110553611A CN 110553611 A CN110553611 A CN 110553611A CN 201910692785 A CN201910692785 A CN 201910692785A CN 110553611 A CN110553611 A CN 110553611A
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
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- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention belongs to the technical field of digital detection, and particularly relates to a tool normal hole position degree detection method based on a three-coordinate measuring machine. Firstly, a pin which can be matched with a hole position to be measured is manufactured, the pin is in gapless fit with a normal hole, secondly, hole center position coordinates are measured on a designed three-dimensional digital model, and the preset normal offset is added to obtain theoretical position coordinates of the hole center. Thirdly, the ring direction of the pin is touched and measured by utilizing the automatic vector circle function of the three-coordinate measuring machine, the touch and measurement point is positioned in the pin allowance area, and the circle center of the circle formed by the measurement point is positioned on the axis of the pin, so that the actual position coordinate of the hole center is obtained. And finally, obtaining a normal hole position detection result, namely the manufacturing deviation of the hole positions according to a calculation formula. According to the invention, the pin is inserted into the normal hole of the vertical surface of the tool, and the mode of touching the pin cylindrical surface instead of touching the hole wall is used for actual measurement, so that the measurement precision can be ensured, and the measurement error caused by collision of a measurement rod and the hole wall can be avoided.
Description
Technical Field
The invention belongs to the technical field of digital detection, and particularly relates to a tool normal hole position degree detection method based on a three-coordinate measuring machine.
Background
Hole site location degree of putting of frock detects the important component that the frock detected, and frock normal direction hole location degree of putting based on three coordinate measuring machine detects and has two kinds of solutions usually:
During detection, only a semicircle or a quarter circle of a normal hole is detected, the method is simple and convenient to implement, but interference between a measuring rod and the hole wall may be generated during detection, and measuring errors are brought.
The normal vector value of each hole site is calculated by means of three-dimensional digital-analog design software such as CATIA (computer-aided three-dimensional Interactive application), and then the normal vector value is manually input from a three-coordinate measuring machine for measurement.
disclosure of Invention
The purpose of the invention is as follows: the tool normal hole position detection device aims to solve the problem of tool normal hole position detection based on a three-coordinate measuring machine, and meanwhile, the detection precision during detection is guaranteed while no interference is generated during measurement. A tool normal hole position degree detection method based on a three-coordinate measuring machine is provided.
the technical scheme is as follows: according to the invention, the pin is inserted into the normal hole of the vertical surface of the tool, and the mode of touching the pin cylindrical surface instead of touching the hole wall is used for actual measurement, so that the measurement precision can be ensured, and the measurement error caused by collision of a measurement rod and the hole wall can be avoided. The method comprises the following specific steps:
Firstly, a pin which can be matched with the hole position to be measured is manufactured, the pin is in gapless fit with the normal hole,
Secondly, hole center position coordinates are measured on the designed three-dimensional digital model, and the preset normal offset is added to obtain theoretical position coordinates (X1, Y1 and Z1) of the hole center.
Thirdly, the ring direction of the pin is touched and measured by utilizing the automatic vector circle function of the three-coordinate measuring machine, the touch measuring point is positioned in the pin allowance area, the circle center of the circle formed by the measuring points is positioned on the axis of the pin, and the actual position coordinates (X2, Y2 and Z2) of the hole center are obtained.
and finally, obtaining a normal hole position detection result, namely the manufacturing deviation of the hole positions according to a calculation formula.
ES＝((X1-X2)2+(Y1-Y2)2+(Z1-Z2)2)1/2。
In order to further improve the reliability of the detection result, the method comprises the following steps:
theoretical hole center position: hole center position coordinates are measured on a designed three-dimensional digital analog (CATIA software self-contained function), and normal offset is added to obtain hole center theoretical position coordinates.
Actual hole center position: and (5) utilizing a three-coordinate measuring machine to touch and measure the circumferential direction of the pin to obtain the actual position coordinates of the hole center.
Hole site deviation: the deviation value between the theoretical hole center position and the actual hole center position can be generated by using a formula or measuring machine software during actual calculation.
The pin is made of the same material as the tool and is in clearance-free fit with the tool testing hole, and the length of the pin is ensured to penetrate through the testing hole while enough allowance is reserved, wherein the allowance is not smaller than 15 mm.
The test points are located in the pin allowance area, and the circle centers of circles formed by the test points are located on the pin axis.
The beneficial technical effects are as follows: the invention provides a method for measuring a normal hole of a tool by using a three-coordinate measuring machine, which is characterized in that a pin capable of well matching with a hole position is manufactured, and a point on the cylindrical surface of the contact measuring pin is used for replacing a point on the inner side of the wall of the contact measuring hole to evaluate the position degree and the roundness of the hole, thereby ensuring the measuring precision and improving the measuring efficiency compared with the traditional method.
the invention can effectively detect the position degree and the roundness of the normal hole of the tool, can better measure the manufacturing conformance of the tool, and simultaneously effectively guarantees the manufacturing process of a product.
Drawings
FIG. 1 shows a tool under test having a vertical normal hole,
FIG. 2 uses a three coordinate measuring machine to sense the pin ring direction.
Detailed Description
Referring to the attached drawings 1 and 2, the invention is applied to three-coordinate measurement of the normal hole position and the roundness of a certain product assembly tool. According to the invention, the pin is inserted into the normal hole of the vertical surface of the tool, and the mode of touching the pin cylindrical surface instead of touching the hole wall is used for actual measurement, so that the measurement precision can be ensured, and the measurement error caused by collision of a measurement rod and the hole wall can be avoided. The method comprises the following specific steps:
firstly, a pin which can be matched with a hole position to be measured is manufactured, the pin is in gapless fit with a normal hole, the pin material is consistent with a tool material, the length of the pin is ensured to penetrate through the normal hole, meanwhile, enough allowance is reserved, the length of the allowance is not smaller than 15mm, and the manufactured pin is inserted into the tool normal hole, as shown in figure 2.
And secondly, measuring hole center position coordinates on a designed three-dimensional digital-to-analog (CATIA software self-contained function), and adding a preset normal offset to obtain theoretical position coordinates (X1, Y1 and Z1) of the hole center.
Thirdly, the circular direction of the pin is touched and measured by utilizing the automatic vector circle function of the three-coordinate measuring machine, the touch measuring point is positioned in the pin allowance area, the circle center of a circle formed by the measuring point is positioned on the axis of the pin, 10-12 points can be uniformly collected in the circular direction area, and the actual position coordinates (X2, Y2 and Z2) of the hole center are obtained.
Fourthly, obtaining the detection result of the normal hole position, namely the manufacturing deviation of the hole position according to a calculation formula
ES＝((X1-X2)2+(Y1-Y2)2+(Z1-Z2)2)1/2。
Claims (8)
1. A tool normal hole position degree detection method based on a three-coordinate measuring machine is characterized by comprising the following steps: the method comprises the following steps:
Firstly, manufacturing a pin which can be matched with a hole position to be detected, wherein the pin is in gapless fit with a normal hole;
Secondly, measuring hole center position coordinates on a designed three-dimensional digital model, and calculating to obtain theoretical position coordinates (X1, Y1 and Z1) of the hole center by adding a preset normal offset;
Thirdly, the ring direction of the pin is touched and measured by utilizing the automatic vector circle function of the three-coordinate measuring machine, and the actual position coordinates (X2, Y2 and Z2) of the hole center are obtained;
And fourthly, calculating to obtain a normal hole position detection result, namely the manufacturing deviation ES of the hole positions.
2. The tool normal hole location degree detection method based on the three-coordinate measuring machine according to claim 1, characterized in that: the second step is calculated by CATIA software.
3. The tool normal hole location degree detection method based on the three-coordinate measuring machine according to claim 1, characterized in that: the manufacturing deviation ES in the fourth step can be calculated by applying a formula or by using software of a measuring machine.
4. the method for detecting the position degree of the normal hole of the tool based on the three-coordinate measuring machine as claimed in claim 1 or 3, wherein the manufacturing deviation ES is calculated by a calculation company ES (X1-X2), 2 + (Y1-Y2), 2 + (Z1-Z2) 2) 1/2.
5. The tool normal hole location degree detection method based on the three-coordinate measuring machine according to claim 1, characterized in that: the pin is made of the same material as the tool and is in clearance-free fit with the tool testing hole.
6. The tool normal hole position degree detection method based on the three-coordinate measuring machine according to claim 1 or 5, characterized in that: the length of the pin is sufficient to allow penetration of the test hole while still allowing sufficient clearance.
7. The tool normal hole location degree detection method based on the three-coordinate measuring machine according to claim 6, characterized in that: the margin is not less than 15 mm.
8. The tool normal hole location degree detection method based on the three-coordinate measuring machine according to claim 1, wherein a center of a circle formed by the touch test point is located on an axis of the pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910692785.6A CN110553611A (en) | 2019-07-26 | 2019-07-26 | tool normal hole position degree detection method based on three-coordinate measuring machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910692785.6A CN110553611A (en) | 2019-07-26 | 2019-07-26 | tool normal hole position degree detection method based on three-coordinate measuring machine |
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| CN110553611A true CN110553611A (en) | 2019-12-10 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111895941A (en) * | 2020-06-17 | 2020-11-06 | 陕西飞机工业（集团）有限公司 | Convenient measuring method for normal hole |
| CN116237818A (en) * | 2022-12-29 | 2023-06-09 | 广东中海万泰技术有限公司 | Offset measuring method for deep hole machining |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557760A (en) * | 2013-10-21 | 2014-02-05 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for detecting space small-diameter inclined hole position degree on thin-wall curved surface |
| CN203534549U (en) * | 2013-10-25 | 2014-04-09 | 广州汽车集团股份有限公司 | Special hole position tracking device for three-coordinate measuring machine |
-
2019
- 2019-07-26 CN CN201910692785.6A patent/CN110553611A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557760A (en) * | 2013-10-21 | 2014-02-05 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for detecting space small-diameter inclined hole position degree on thin-wall curved surface |
| CN203534549U (en) * | 2013-10-25 | 2014-04-09 | 广州汽车集团股份有限公司 | Special hole position tracking device for three-coordinate measuring machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111895941A (en) * | 2020-06-17 | 2020-11-06 | 陕西飞机工业（集团）有限公司 | Convenient measuring method for normal hole |
| CN116237818A (en) * | 2022-12-29 | 2023-06-09 | 广东中海万泰技术有限公司 | Offset measuring method for deep hole machining |
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Application publication date: 20191210 |
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| RJ01 | Rejection of invention patent application after publication |