CN113108666B - Position measuring method for threaded mounting hole with orifice in deep hole - Google Patents
Position measuring method for threaded mounting hole with orifice in deep hole Download PDFInfo
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- CN113108666B CN113108666B CN202110369215.0A CN202110369215A CN113108666B CN 113108666 B CN113108666 B CN 113108666B CN 202110369215 A CN202110369215 A CN 202110369215A CN 113108666 B CN113108666 B CN 113108666B
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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
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
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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
The invention discloses a position measuring method of a threaded mounting hole with a hole opening positioned in a deep hole, wherein the deep hole is a stepped hole, the hole opening of the threaded mounting hole is positioned on the stepped surface of the stepped hole, and a plurality of threaded mounting holes are formed, and the method comprises the following steps: step 1, after a rod-shaped part is matched with a small-diameter hole of a stepped hole, the rod-shaped part is positioned in the small-diameter hole, one part of the rod-shaped part is positioned in the large-diameter hole, and the rod-shaped part forms solid extension to the center of the stepped hole; step 2, installing a bolt in each threaded mounting hole, wherein the bolts are positioned around the rod-shaped component, and after the bolts and the threaded mounting holes are assembled, entity extension is formed in the center of the threaded mounting holes; and 3, measuring the distance between two adjacent bolts and the distance between each bolt and the rod-shaped component, and calculating the actual coordinate of each threaded mounting hole according to the distance and the distance. The invention realizes the measurement of the threaded mounting hole with the orifice positioned in the deep hole.
Description
Technical Field
The invention relates to a position measuring method of a threaded mounting hole with a hole opening positioned in a deep hole.
Background
The rotary hub assembly is a very large assembly, the rotary hub assembly comprises a rotary hub and a thrust sleeve, a step hole formed by a large-diameter hole and a small-diameter hole is formed in the rotary hub, the step hole is a deep hole with a deep depth, a threaded mounting hole is formed in the rotary hub, an orifice of the threaded mounting hole is located on a step surface of the step hole, the thrust sleeve is located in the step hole, and a bolt penetrates through a mounting hole in the thrust sleeve and is in threaded connection with the threaded mounting hole in the rotary hub, so that the rotary hub and the thrust sleeve are fixed into a whole.
When the flying shear equipment of a certain steel mill is repaired, wherein the rotating hub assembly is an old assembly which is left unused by a user for more than ten years, after the thrust sleeve which cannot be used is disassembled from the step hole of the rotating hub, when a new thrust sleeve is installed on the rotating hub, the threaded installation hole of 8 multiplied by M8 on the rotating hub is found not to correspond to the assembly hole on the thrust sleeve and cannot be installed. Through preliminary analysis of the thrust sleeve and the rotary hub, the conclusion is that the position of the threaded mounting hole in the rotary hub is deviated from the position of the assembling hole in the thrust sleeve.
Although the positional relationship of the holes can be usually measured by a measuring tool such as a vernier caliper, the opening of the threaded mounting hole is located on a step surface having a depth of 65mm from the axial end surface of the opening of the stepped hole of the hub, and the measurement cannot be performed by a conventional measuring tool, so that the machining position of the fitting hole of the thrust sleeve through which the bolt passes is difficult to determine, and the thrust sleeve and the hub cannot be mounted.
In the existing actual operation process, the thrust sleeve is newly manufactured, the rotating hub is detached from old equipment, and a threaded mounting hole in the rotating hub is not manufactured according to the drawing, so that errors occur in connection with the thrust sleeve. The limit is that the measuring equipment cannot perform detection when the rotating hub is installed on the frame and the measuring position is about 3 meters away from the ground.
According to the stress requirement, 8M 8 bolts must be installed on the rotating hub and the thrust sleeve, and the installation of the rotating hub and the thrust sleeve fails as long as one of the threaded installation holes does not correspond to the other threaded installation hole. The length of the hub itself is 8000mm, the maximum outer diameter is 1180mm, and the weight is up to 32 tons, which is a high cost if the threaded mounting holes on the hub are considered to be repaired or corrected.
Disclosure of Invention
The invention provides a position measuring method of a threaded mounting hole with an orifice positioned in a deep hole, which realizes the measurement of the threaded mounting hole with the orifice positioned in the deep hole.
The method for measuring the position of the threaded mounting hole with the hole opening positioned in the deep hole is characterized in that the deep hole is a stepped hole, the hole opening of the threaded mounting hole is positioned on the step surface of the stepped hole, and a plurality of threaded mounting holes are formed, and the method comprises the following steps:
step 1, after a rod-shaped part is matched with a small-diameter hole of a stepped hole, the rod-shaped part is positioned in the small-diameter hole, one part of the rod-shaped part is positioned in the large-diameter hole, and the rod-shaped part forms solid extension to the center of the stepped hole;
and 3, measuring the distance between two adjacent bolts and the distance between each bolt and the rod-shaped component, and calculating the actual coordinate of each threaded mounting hole according to the distance and the distance.
Further, in step 1, the part of the rod-shaped member located in the large-diameter hole is cylindrical.
Further, in step 1, one end of the rod-like member is exposed to the outside of the deep hole.
Further, in step 3, the distance is the distance between the outer circle of the bolt and the outer circle of the rod-shaped component based on the outer circle of the rod-shaped component.
The invention has the following advantages:
1. for the condition of a deep hole (deep hole) which cannot be directly measured by a common measuring tool, a measuring reference is extended by adopting an extension or leading-out method, so that the measurement of a threaded mounting hole with an orifice positioned in the deep hole is realized;
2. the method is applied to the condition of repair, repair or new manufacture (thrust sleeve), so that the time and cost for detecting the machine tool are reduced; 3. the measurement of various precision requirements can be met according to the precision of the measurement tool and the precision of the selected measuring tool.
Drawings
FIG. 1 is a schematic view of a rotary hub;
FIG. 2 is a schematic view of adjacent bolts and the bolts and bar as measured;
reference numbers in the drawings:
the structure comprises a rotary hub 1, a deep hole 10, a step surface 11, a first hole 12, a second hole 13, a third hole 14 and a threaded mounting hole 20;
a rod-like member 2;
a bolt 3;
distance S, pitch L.
Detailed Description
As shown in fig. 1, the position measurement method of the threaded mounting hole with the hole opening in the deep hole is that the deep hole 10 is a step hole, in this embodiment, the deep hole 10 is a hole on the rotating hub 1, the total depth of the deep hole 10 is 335mm, the deep hole is composed of a first hole 12, a second hole 13, and a third hole 14, the inner diameter of the first hole 12 is 94mm, the inner diameter of the second hole 13 is 56mm, the inner diameter of the third hole 14 is 54mm, and the step surface 11 is located between the first hole 12 and the second hole 13.
The threaded mounting hole 20 is opened on the rotary hub 1, the orifice of the threaded mounting hole 20 is located on the step surface 11 of the step hole, therefore, the threaded mounting hole 20 is located in the deep hole 10, the number of the threaded mounting holes 20 is multiple, in this embodiment, 8 threaded mounting holes 20 are provided on the rotary hub 1, and the positions of the threaded mounting holes 20 are detected by the following method:
step 1, after the rod-shaped part 2 is matched with a small-diameter hole of a stepped hole, in this embodiment, the small-diameter hole is composed of a second hole 13 and a third hole 14, the rod-shaped part 2 is positioned in the small-diameter hole, in this embodiment, the rod-shaped part 2 is matched with the second hole 13 and positioned in the second hole 13, a part of the rod-shaped part 2 is positioned in the large-diameter hole, the large-diameter hole is a first hole 12, the rod-shaped part 2 forms a solid extension for the center of the stepped hole, and after the rod-shaped part 2 is matched with the second hole 13 and positioned, the center of the rod-shaped part 2 coincides with the center of the deep hole, so that the center of the rod-shaped part 2 is equivalent to the center of the deep hole, and thus the solid extension is formed for the center of the deep hole, and thus it is convenient to directly set a reference point or a reference position on the rod-shaped part 2 for measurement.
In step 1, the portion of the rod-shaped member 2 located in the large-diameter hole is cylindrical, and the second hole 13 is a circular hole, so in this embodiment, it is preferable that the rod-shaped member 2 is entirely cylindrical, and one end of the rod-shaped member 2 is exposed to the outside of the deep hole 10.
And 3, measuring the distance S between two adjacent bolts 3 and the distance L between each bolt 3 and the rod-shaped component 2, and calculating the actual coordinate of each threaded mounting hole according to the distance L and the distance. The distance S between any two adjacent bolts 3 is measured with the outer peripheral surface of the head of each bolt 3 as a reference, and the distance L between the bolt 3 and the rod 2 is measured with the outer periphery of the rod 2 and the outer peripheral surface of the head of the bolt 3 as references.
The following is illustrated by specific examples:
firstly, a rod-shaped component 2 (the measured outer diameter phi of the rod-shaped component 2 is 56 mm) with the diameter of 56mm (the tolerance is-0.2/0) and the length of 140mm is manufactured;
preparing 8M 8 bolts 3 with the length of 85mm, wherein the actually measured external diameter of the thread of each bolt 3 is 7.8mm;
the rod-shaped part 2 is arranged in a second hole 13 on the rotary hub 1, the rod-shaped part 2 is confirmed to be positioned in the second hole 13 without swinging or axial movement, and the outer circle of the rod-shaped part 2 is used as a measuring reference;
each threaded mounting hole 20 is provided with one bolt 3 of the M8, and the length of each bolt 3 screwed into the threaded mounting hole 20 is 30mm;
the distance S between two adjacent bolts 3 and the distance L between each bolt 3 and the stick 2 are measured, and L is the distance between the outer circle of the head of the bolt and the outer circle of the stick 2. Due to the small size of L, this time using a gauge block measurement, as shown in fig. 2.
And (3) analyzing the measurement result: since the dimensions of the rod-shaped member 2 and the bolt 3 are known, the actual coordinates of each threaded mounting hole 20 can be calculated from the distance S and the distance L to determine the actual position of each threaded hole, and the theoretical value and the actual value are compared and analyzed by a mapping method to make a repair plan of the thrust sleeve, or a new thrust sleeve is made, and the position of the mounting hole on the thrust sleeve is determined by the position of each threaded mounting hole 20.
The above description is only an exemplary embodiment of the present invention, and should not be used to limit the scope of the present invention, and any equivalent changes and modifications by those skilled in the art should be included in the protection scope of the present invention without departing from the spirit and principle of the present invention.
Claims (4)
1. The position measuring method of the threaded mounting hole with the hole opening positioned in the deep hole is characterized by comprising the following steps of:
step 1, after a rod-shaped part (2) is matched with a small-diameter hole of a step hole, the rod-shaped part (2) is positioned in the small-diameter hole, one part of the rod-shaped part (2) is positioned in the large-diameter hole, and the rod-shaped part (2) forms a solid extension to the center of the step hole;
step 2, installing a bolt (3) in each threaded mounting hole (20), wherein the bolts (3) are positioned around the rod-shaped component (2), and after the bolts (3) are assembled with the threaded mounting holes (20), entity extension is formed in the centers of the threaded mounting holes (20);
step 3, measuring the distance (S) between two adjacent bolts (3) and the distance (L) between each bolt (3) and the rod-shaped component (2), and calculating the actual coordinate of each threaded mounting hole (20) according to the distance (S) and the distance (L); and comparing and analyzing the theoretical value and the measured value by using a drawing method, and making a repair scheme of the thrust sleeve or making a new thrust sleeve, wherein the position of the mounting hole on the thrust sleeve is determined by the position of each thread mounting hole (20).
2. A method for measuring the position of a threaded mounting hole with an orifice in a deep hole according to claim 1, wherein in step 1, the portion of the rod-shaped member (2) in the large-diameter hole is cylindrical.
3. A method for measuring the position of a threaded mounting hole having an opening in a deep hole according to claim 1, wherein in step 1, one end of the rod-like member (2) is exposed to the outside of the deep hole (10).
4. A method for measuring the position of a threaded mounting hole with an orifice in a deep hole according to claim 1 or 2, wherein in step 3, the distance (L) is the distance between the outer circumference of the bolt (3) and the outer circumference of the rod-shaped member (2) based on the outer circumference of the rod-shaped member (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110369215.0A CN113108666B (en) | 2021-04-07 | 2021-04-07 | Position measuring method for threaded mounting hole with orifice in deep hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110369215.0A CN113108666B (en) | 2021-04-07 | 2021-04-07 | Position measuring method for threaded mounting hole with orifice in deep hole |
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| CN113108666A CN113108666A (en) | 2021-07-13 |
| CN113108666B true CN113108666B (en) | 2023-03-14 |
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| CN202110369215.0A Active CN113108666B (en) | 2021-04-07 | 2021-04-07 | Position measuring method for threaded mounting hole with orifice in deep hole |
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Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101261108B (en) * | 2008-03-19 | 2010-08-11 | 中国航空工业第一集团公司北京航空精密机械研究所 | Spatial hole parameter measuring apparatus and measuring method |
| CN201273803Y (en) * | 2008-09-26 | 2009-07-15 | 上海联合滚动轴承有限公司 | Installation pore position measurement apparatus for large pivoting support bearing |
| CN103344162A (en) * | 2013-07-26 | 2013-10-09 | 张家口动力机械有限公司 | Measuring tool for measuring positions of threaded holes and key slots |
| CN104111016A (en) * | 2014-06-24 | 2014-10-22 | 湖北精工钢结构有限公司 | Bole pitch measurement apparatus |
| CN204064154U (en) * | 2014-08-12 | 2014-12-31 | 广西玉柴机器股份有限公司 | For the aid that screw is measured |
| CN204373538U (en) * | 2014-11-05 | 2015-06-03 | 天津泰威齿轮有限公司 | A kind of gear position degree pick-up unit efficiently |
| CN204788136U (en) * | 2015-06-25 | 2015-11-18 | 洛阳鸿元轴承科技有限公司 | Quick detection device of inside and outside ring of mounting hole position degree on precise rotating platform bearing |
| CH714509B1 (en) * | 2017-12-22 | 2021-07-15 | Willemin Macodel Sa | Dimensional measurement method of a part and measuring tool to implement the method. |
| CN108267057B (en) * | 2017-12-29 | 2023-11-03 | 中车戚墅堰机车车辆工艺研究所有限公司 | Device and method for detecting position of bottom thread of cylindrical deep hole |
| CN211783223U (en) * | 2019-09-07 | 2020-10-27 | 青岛华瑞汽车零部件股份有限公司 | Micrometer for measuring pitch of holes |
| CN210892926U (en) * | 2019-12-30 | 2020-06-30 | 上海长锐汽车零部件有限公司 | Hole site measuring tool |
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