CN102878968B - A kind of online test method of large moldeed depth blind hole size - Google Patents
A kind of online test method of large moldeed depth blind hole size Download PDFInfo
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- CN102878968B CN102878968B CN201210351955.2A CN201210351955A CN102878968B CN 102878968 B CN102878968 B CN 102878968B CN 201210351955 A CN201210351955 A CN 201210351955A CN 102878968 B CN102878968 B CN 102878968B
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Abstract
The invention discloses a kind of online test method of blind hole size, comprise: detection gauge head stretches in blind hole by (1), make gauge head axis consistent with the cutter cutter axis orientation adding man-hour, along depth direction, successively detection is touched at the inwall point at multiple different depth place to blind hole, obtain the first measured value of each hole diameter of section; (2) rotate detection gauge head, make its axis be 180 ° with adding the cutter cutter axis orientation in man-hour, more successively successively detection is touched to the corresponding inwall point of each depth of blind hole along the reverse direction that forward detects, obtain the second measured value of each hole diameter of section; (3) two measured values at same depth place in forward detection and reverse detection are averaged, part blind hole size can be obtained.The present invention can efficiently reduce the blind hole detection scale error because revolving shaft deviation causes, and can measure more accurately and obtain part blind hole size.
Description
Technical field
The present invention relates to hole dimension detection field, specifically a kind of online test method of large moldeed depth blind hole sectional dimension.
Background technology
In general, the blind hole that hole depth is not less than 7 with the ratio of bore dia can be described as dark blind hole, i.e. L/D >=7.Need detect size during hole machined in large moldeed depth blind hole, generally need to use special measurement device to carry out.Such as, throw-over gear installed by tool holder of lathe, installation for various lathe tool and dedicated test gauge head is changed, by this converting mechanism, large revolving body inner cavity of component is processed and size quantitative measurment simultaneously, and calculate compensation according to testing result, then add compensation examinations when semi-finishing or finishing.
The detection method of current routine is, first utilizes lathe X, Z axis function carries out straight-line feed motion, and then, the coordinate figure of the collision material object parts charged timeout point of impingement, finally uses mathematical formulae to carry out calculating diameter value.But, in traditional detection method, because gauge head only detects a revolving parts point coordinate diametrically, the result that the method detects and physical size have error, and, because large-scale machining tool is for solving processing cutter relieving problem, the centre of gyration and machine Z-axis are designed to not parallel, and main shaft can deflect to the direction that process tool penetration of a cutting tool is contrary, in addition, the large multiplex centre frame of heavy parts processing, centre frame Adjustment precision is many at more than 0.1mm, so also can cause inner bore of part metrical error.
Find through overtesting and data analysis, error is caused by the deviation of part revolving shaft, when the degree of depth of this error in hole is not dark, impact is little, but when the depth dimensions in hole is larger, such as shallow blind hole if the degree of depth is more than 100mm, the accuracy of detection error that this deviation causes just can reach more than 0.02mm.This error can be resolved into vertical error and left and right error is analyzed respectively, as illustrated in fig. 1 and 2, δ 1 is vertical error, if δ 2 is the errors in the centre of gyration and Z axis level, namely the diameter error of lateral error to blind hole to be measured has the greatest impact is δ 2.Diameter of bore is greater than to the part of Φ 100, vertical error impact is very little, and lateral error is then the principal element affecting accuracy of detection.
Summary of the invention
The object of the invention is to the online test method proposing a kind of blind hole size, it is by detecting 2 points in blind hole diameter, reduce lateral error, thus reduce because revolving shaft deviation causes large revolving body inner bore of part to detect scale error, and then improve the accuracy of detection of part.
Realize the concrete technical scheme that the object of the invention adopts as follows.
An online test method for blind hole size, comprises the steps:
(1) forward detecting step
Detection gauge head is stretched in blind hole, makes gauge head axis consistent with the cutter cutter axis orientation adding man-hour, along depth direction, successively detection is touched at the inwall point at multiple different depth place to blind hole, obtain the first measured value of each hole diameter of section;
(2) reverse detecting step
Rotate and detect gauge head, make its axis be 180 ° with adding the cutter cutter axis orientation in man-hour, more successively successively detection is touched to the corresponding inwall point of each depth of blind hole along the reverse direction that forward detects, obtain the second measured value of each hole diameter of section;
(3) two measured values at same depth place in forward detection and reverse detection are averaged, part blind hole diameter value everywhere can be obtained.
As improvement of the present invention, at same depth, the line of the inwall point that the inwall point that described forward detects is corresponding to reverse detection crosses blind hole central point.
As improvement of the present invention, the direction that described forward detects is along depth direction from outside to inside or from inside to outside.
Method of the present invention is by detecting 2 points in blind hole diameter, and 2 detected values are averaged, the impact of elimination of level error, thus efficiently reduce the blind hole detection scale error because revolving shaft deviation causes, can measure more accurately and obtain part blind hole size.
Accompanying drawing explanation
Fig. 1 is vertical direction error analysis schematic diagram;
Fig. 2 is horizontal direction error analysis schematic diagram;
Fig. 3 is for detecting cross sectional representation.
Embodiment
Below in conjunction with the drawings and specific embodiments, method of the present invention is described in detail.It should be noted that, following embodiment is only exemplary, and not forming is limitation of the invention.
The online test method of blind hole size of the present invention specifically comprises the steps:
(1) forward detecting step
After machining, processing handle of a knife converts to and detects gauge head handle of a knife by application throw-over gear, detects gauge head consistent with process tool direction.Before detecting, advanced row carries out the demarcation of positive dirction detection.
Detection gauge head is stretched in blind hole, makes gauge head axis consistent with the cutter cutter axis orientation adding man-hour, from outside to inside successively detection is touched at the inwall point at multiple different depth place to blind hole along depth direction, obtain the first measured value of each hole diameter of section.
(2) reverse detecting step
Take off detection handle of a knife, rotate 180 °, install and detect gauge head handle of a knife, detect gauge head and become 180 ° with process tool direction.
The reverse direction detected along forward again touches detection successively to the corresponding inwall point of each depth of blind hole successively, obtains the second measured value of each hole diameter of section.
(3) two measured values at each same depth place in forward detection and reverse detection are averaged, part blind hole size can be obtained.
In the present embodiment, when forward detects, handle of a knife along blind hole axis ecto-entad gradually deeply, makes the gauge head be arranged on handle of a knife touch check point on inwall successively, obtains one group of detected value.Before reverse detection, first keep knife bar motionless, rotary measuring head 180 °, reverse check point corresponding with forward check point on inwall for each depth of touching, forward check point and corresponding reverse check point are positioned at same plane, and both and hole heart line are 180 °, and namely both lines are through the via hole heart.Be averaged the diameter dimension of forward and the opposite direction point of position corresponding thereto value computing one by one, and income value is the detection diameter of each correspondence position.
The present invention is when carrying out on-line checkingi to large moldeed depth blind-hole parts endoporus, the large revolving body inner bore of part caused for eliminating revolving shaft deviation detects scale error, 2 points are detected by detecting diametrically level 180 ° at each, and 2 detected values are averaged, with the impact of elimination of level error, thus greatly improve accuracy of detection.Method of the present invention is applicable to the accurate on-line checkingi of large revolving body inner bore of part.
Claims (2)
1. an online test method for blind hole size, is characterized in that, the method comprises the steps:
(1) forward detecting step
Detection gauge head is stretched in blind hole, make gauge head axis consistent with the cutter cutter axis orientation adding man-hour, along depth direction, successively detection is touched at the inwall point at multiple different depth place to blind hole, obtain the first measured value of each hole diameter of section, the direction that wherein said forward detects is along blind hole depth direction from outside to inside or from inside to outside;
(2) reverse detecting step
Rotate and detect gauge head, make its axis be 180 ° with adding the cutter cutter axis orientation in man-hour, more successively successively detection is touched to the corresponding inwall point of corresponding each depth of blind hole along the reverse direction that forward detects, obtain the second measured value of each hole diameter of section;
(3) two measured values at same depth place in forward detection and reverse detection are averaged, the diameter value of the corresponding position of blind hole can be obtained.
2. method according to claim 1, is characterized in that, at same depth, the line of the inwall point that the inwall point that described forward detects is corresponding to reverse detection crosses blind hole central point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210351955.2A CN102878968B (en) | 2012-09-20 | 2012-09-20 | A kind of online test method of large moldeed depth blind hole size |
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| CN201210351955.2A CN102878968B (en) | 2012-09-20 | 2012-09-20 | A kind of online test method of large moldeed depth blind hole size |
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| CN102878968A CN102878968A (en) | 2013-01-16 |
| CN102878968B true CN102878968B (en) | 2015-07-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114858081A (en) * | 2022-03-22 | 2022-08-05 | 胜宏科技（惠州）股份有限公司 | Visual detection device and method for controlling depth of deep hole |
| CN114734309B (en) * | 2022-04-25 | 2023-04-25 | 深圳数马电子技术有限公司 | Cutter core thickness measuring method, device, equipment and readable storage medium |
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| WO2007099646A1 (en) * | 2006-02-28 | 2007-09-07 | Canon Kabushiki Kaisha | Circular shape measurement method, cylindrical shape measurement method, and cylindrical shape measurement apparatus |
| CN1737495A (en) * | 2005-07-12 | 2006-02-22 | 长安汽车（集团）有限责任公司 | Method for measuring bore diameter with fixed direction utilizing three coordinate measuring machine |
| CN102650516B (en) * | 2011-02-28 | 2014-10-29 | 宝山钢铁股份有限公司 | On-line measuring method and device for outer diameter and ovality of large-diameter steel pipe end |
| CN202304704U (en) * | 2011-10-21 | 2012-07-04 | 上海重型机器厂有限公司 | Lever measuring structure and deep hole diameter measuring device with the same |
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