CN116753803A - Method for directly measuring size of space intersection point in catheter positioning welding clamp - Google Patents
Method for directly measuring size of space intersection point in catheter positioning welding clamp Download PDFInfo
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- CN116753803A CN116753803A CN202310685284.1A CN202310685284A CN116753803A CN 116753803 A CN116753803 A CN 116753803A CN 202310685284 A CN202310685284 A CN 202310685284A CN 116753803 A CN116753803 A CN 116753803A
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- pin
- size
- intersection point
- positioning
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000003466 welding Methods 0.000 title claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 238000009434 installation Methods 0.000 claims description 13
- 238000005259 measurement Methods 0.000 claims description 12
- 238000013519 translation Methods 0.000 claims description 3
- 238000012797 qualification Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
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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
-
- 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
- G01B5/0037—Measuring of dimensions of welds
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The application discloses a method for directly measuring the size of a space intersection point in a catheter positioning welding fixture. The application can reduce the times of measuring unqualified and repairing and measuring by the measuring machine, shorten the manufacturing period of the catheter positioning welding clamp, reduce the manufacturing cost and improve the one-time measuring qualification rate.
Description
Technical Field
The application relates to the technical field of design and manufacture of aircraft industrial equipment, in particular to a method for directly measuring the size of a space intersection point in a catheter positioning welding clamp.
Background
The hydraulic (pneumatic) system for aircraft is formed by connecting a large number of pipes with different shapes. The manufacture of these conduits is not separated from the special process equipment-conduit tack welding jig. The catheter positioning welding fixture is mainly used for determining the mutual position relation of welded catheter components such as a catheter, a single lug, a double-lug bracket and the like, so that the welding precision is ensured, and the welding efficiency is improved.
In order to ensure the accuracy of the mutual position relation of the components on the welding guide pipe, a certain number of space intersection points are arranged on each positioning piece (positioning pin, positioning support arm and the like) on the positioning welding clamp according to the requirement. These spatial intersections have a linear dimensional tolerance of + -0.2 mm and an angular tolerance of + -10' with respect to the tack weld fixture mounting references.
The position dimensions of these spatial intersections, although giving coordinate values based on the installation reference in the theoretical model, cannot be directly measured in the manufacturing process because the dimensions are spatial dimensions. The assembly of the prior art method can only be indirectly ensured by measuring the dimensions of components, such as columns, high supports, etc., which have a relative positional relationship with the components. However, the percent of pass of the parts assembled in this way is only twenty percent. And then carrying out repair, inspection and repair according to the data of the measurement report until the measurement is qualified. Therefore, the process method needs to send the measuring machine for multiple times and repair for multiple times, has long turnover path, low one-time qualification rate and long manufacturing period. There is an urgent need for a tool and a method for measuring a space dimension directly during a manufacturing process, so that a measuring period and a repairing period are reduced, and a production efficiency is improved.
Disclosure of Invention
In order to solve the problems, the application provides a process pin and a method for measuring the space intersection point of a catheter positioning welding fixture. The application can improve the one-time cross inspection qualification rate of the catheter positioning welding clamp and shorten the manufacturing period.
In order to achieve the purpose, the application adopts the following technical scheme:
a method for directly measuring the size of a spatial intersection point in a catheter tack welding fixture, characterized by the following process:
1, extracting the axis position coordinates of a theoretical hole at a position to be detected in a catheter positioning welding fixture from a theoretical digital-analog, and determining the position of a space intersection point to be detected, wherein the distance A between the space intersection point to be detected and a positioning bolt;
2, manufacturing a process pin, comprising a pin shaft and a tool ball arranged at one end, and is characterized in that the tool ball is arranged on the end face of one end of the pin shaft, the center of the ball is coaxial with the center line of the pin shaft, a positioning pin through hole perpendicular to the axis of the pin shaft is arranged on the side face of the other end of the pin shaft, the diameter of the axis is consistent with the aperture of a theoretical hole, and the distance from the pin through hole to the center of the tool ball is a fixed value size A;
3, determining the installation reference of the catheter positioning welding clamp, and performing initial assembly on each part according to the relative position relation of the installation reference;
4, mounting the process pin into a positioning hole at a position to be detected in the catheter positioning welding clamp, fixing the process pin by using a positioning bolt, taking the spherical center of the tool sphere as the position of the space intersection point P, and measuring the position size from the positioning welding clamp mounting reference to the spherical center P;
5, removing the process pin, installing the process pin from the other side of the positioning hole, fixing the process pin by using a positioning bolt, and measuring the position size from the installation reference of the positioning welding fixture to the spherical center P';
and 6, making P, P ' point on a theoretical digital-analog model according to the actually measured position size of P, P ', wherein the P point is the actual position of the intersection point of the space to be measured in the catheter positioning welding clamp, and the connecting line of P, P ' is the actual position of the axis of the positioning pin.
7, comparing the position size of the actually measured space intersection point with the theoretical size on a theoretical digital-analog, and if the actually measured value is not within the tolerance range of the theoretical size, analyzing and calculating according to the comparison result, determining a repairing scheme and repairing;
8 repeating the steps 3-6 until the measurement results meet the tolerance requirements.
Further, the tool ball comprises a cylindrical rod and a ball head, one end of the cylindrical rod close to the ball is provided with a circular flange, the cylindrical rod of the tool ball is arranged in the blind hole of the pin shaft, the bottom surface of the flange of the cylindrical rod is clamped on the end surface of the pin shaft, and the tool ball is fixed on the flange.
Further, when the sphere center of the tool sphere is measured, the tool sphere center is directly measured by means of numerical control equipment or fine boring equipment.
Further, the repairing scheme is to analyze the angle of the assembly where the space intersection point is located on a theoretical digital model according to the included angle between the connecting line of P, P' and the theoretical axis of the locating pin, and determine the thickness of the upper bottom surface of the assembly where the space intersection point is located for polishing or padding and the translation distance of the assembly according to the difference value between the dimension of the two directions P and the theoretical dimension.
The application determines the initial installation actual position of the space intersection point by the forward installation and the reverse installation of the process measurement pin at the measured theoretical position of the space intersection point of the catheter positioning welding clamp, and can directly obtain the actual size of the space intersection point by means of measurement of numerical control equipment or fine boring equipment, thereby realizing fine adjustment of the assembly where the space intersection point is located in the manufacturing stage and ensuring that the position size of the space intersection point is within a tolerance range. The application can reduce the times of measuring unqualified and repairing and measuring by the measuring machine, shorten the manufacturing period of the catheter positioning welding clamp, reduce the manufacturing cost and improve the one-time measuring qualification rate.
The present application will be described in further detail with reference to the accompanying drawings and examples.
Drawings
FIG. 1 catheter tack weld fixture;
FIG. 2 is a process pin block diagram;
FIG. 3 is a pin structure diagram;
FIG. 4 is a view of a process ball configuration;
fig. 5 is a schematic illustration of spatial intersection measurements.
The numbering in the figures illustrates: 1. theoretical locating holes; 2. a bolt positioning hole; 3. a positioning pin; 4. a process measurement pin; 5. a pin shaft; 6. a tool ball; 7. an end face of the pin shaft; 8. blind holes on the end faces of the pin shafts; 9. pin shaft bolt positioning holes; 10. tool ball head; 11. a flange on the tool ball; 12. a cylindrical rod on the tool ball; 13. a clamp mounting reference; 14. positioning a bolt; 15. a column bottom plane; 16. a column; 17. high support
The present application will be described in further detail with reference to the accompanying drawings and examples.
Detailed Description
As shown in fig. 1-5, fig. 1 is a catheter tack weld fixture, fig. 2-4 is a process pin, and fig. 5 is a schematic representation of a spatial intersection measurement. A method for directly measuring the size of a spatial intersection point in a catheter tack welding fixture, characterized by the following process:
1 extracting the axis position coordinate of a theoretical positioning hole 1 at a position to be detected in a catheter positioning welding fixture from a theoretical digital-analog, and the position of a space intersection point P to be detected, wherein the distance A between the space intersection point P to be detected and a positioning bolt hole 2;
2, a manufacturing process pin 4 comprises a pin shaft 5 and a tool ball 6 arranged at one end, and is characterized in that the end face of one end of the pin shaft 5 is provided with the tool ball 6, the ball center of the tool ball 6 is coaxial with the central line of the pin shaft 5, the side face of the other end of the pin shaft 5 is provided with a pin positioning hole 9 perpendicular to the pin shaft axis, the diameter of the pin shaft 5 is consistent with the aperture of the theoretical positioning hole 1, the distance from the pin positioning hole 9 to the ball center of the tool ball 6 is a fixed value A, the tool ball 5 comprises a cylindrical rod 12 and a tool ball head 10, one end of the cylindrical rod 12 close to the tool ball head 10 is provided with a circular flange 11, the cylindrical rod of the tool ball is arranged in the pin shaft blind hole 8, the bottom surface of the flange 11 of the cylindrical rod is clamped on the end face 7 of the pin shaft, and the tool ball 6 is fixed on the flange 11.
3, determining an installation reference 13 of the catheter positioning welding clamp, and performing initial assembly on all parts according to the relative position relation of the installation reference 13;
4, mounting the process pin 4 into a theoretical positioning hole 1 at a position to be detected in a catheter positioning welding clamp, fixing the process pin by using a positioning bolt 14, taking the center of a tool ball 6 as the position of a space intersection point P, and measuring the position size from a positioning welding clamp mounting reference 13 to the center P;
5, removing the process pin 4, installing the process pin 4 from the other side of the theoretical positioning hole 1, fixing the process pin by using a positioning bolt 14, and measuring the position size from the positioning welding fixture installation reference 13 to the sphere center P';
and 6, making P, P ' point on a theoretical digital-analog model according to the actually measured position size of P, P ', wherein the point P is the actual position of the intersection point of the space to be measured in the catheter positioning welding clamp, and the connecting line P, P ' is the actual position of the axis of the positioning pin 3.
7, comparing the position size of the actually measured space intersection point with the theoretical size on a theoretical digital-analog, and if the actually measured value is not within the tolerance range of the theoretical size, analyzing and calculating according to the comparison result, determining a repairing scheme and repairing;
8 repeating the steps 3-6 until the measurement results meet the tolerance requirements.
When the tool ball center P, P' is measured, the measurement is directly performed by means of numerical control equipment or fine boring equipment. The repairing scheme is to analyze the angle of the assembly (the upright 16 and the high support 17) where the space intersection point is located on a theoretical digital-analog basis according to the included angle between the connecting line of P, P' and the theoretical axis of the locating pin 3, and determine the thickness of the upper bottom plane 15 of the assembly (the upright 16 and the high support 17) where the space intersection point is located and the translation distance of the assembly (the upright 16 and the high support 17) according to the difference value between the dimension of the two directions P and the theoretical dimension.
Claims (4)
1. A method for directly measuring the size of a spatial intersection point in a catheter tack welding fixture, characterized by the following process:
1-1, extracting the axis position coordinates of a theoretical hole at a position to be detected in a catheter positioning welding fixture from a theoretical digital model, and determining the position of a space intersection point to be detected, wherein the distance A between the space intersection point to be detected and a positioning bolt;
1-2, a manufacturing process pin comprises a pin shaft and a tool ball arranged at one end, and is characterized in that the tool ball is arranged on the end face of one end of the pin shaft, the center of the ball is coaxial with the center line of the pin shaft, a positioning pin through hole perpendicular to the axis of the pin shaft is arranged on the side face of the other end of the pin shaft, the diameter of the pin shaft is consistent with the aperture of a theoretical hole, and the distance from the pin through hole to the center of the tool ball is a fixed value size A;
1-3, determining an installation reference of a catheter positioning welding clamp, and performing initial assembly on all parts according to the relative position relation of the installation reference;
1-4, mounting a process pin into a positioning hole at a position to be detected in a catheter positioning welding fixture, fixing the process pin by using a positioning bolt, taking the spherical center of a tool ball as the position of a space intersection point P, and measuring the position size from a positioning welding fixture mounting reference to the spherical center P;
1-5, removing the process pin, installing the process pin from the other side of the positioning hole, fixing the process pin by using a positioning bolt, and measuring the position size from the positioning welding fixture installation reference to the sphere center P';
1-6, P, P ' is made on a theoretical digital-analog model according to the actually measured position size of P, P ', the point P is the actual position of the intersection point of the space to be measured in the catheter positioning welding fixture, and the connecting line of P, P ' is the actual position of the axis of the positioning pin.
1-7, comparing the position size of the actually measured space intersection point with the theoretical size on a theoretical digital-analog, and if the actually measured value is not within the tolerance range of the theoretical size, analyzing and calculating according to the comparison result, determining a repairing scheme and repairing;
1-8 repeating steps 3-6 until the measurement results meet the tolerance requirements.
2. The method for directly measuring the size of the space intersection point in the catheter positioning welding fixture according to claim 1, wherein the tool ball comprises a cylindrical rod and a ball head, one end of the cylindrical rod, close to the ball, is provided with a circular flange, the cylindrical rod of the tool ball is arranged in a blind hole of the pin shaft, the bottom surface of the flange of the cylindrical rod is clamped on the end surface of the pin shaft, and the tool ball is fixed on the flange.
3. A method for direct measurement of the size of a spatial intersection in a catheter tack welding fixture according to claim 1, characterized in that the tool sphere center is measured directly by means of a numerical control device or a fine boring device.
4. The method for directly measuring the size of a space intersection point in a catheter positioning welding fixture according to claim 1, wherein the repairing scheme is to analyze the angle of the component where the space intersection point is located on a theoretical digital-analog basis according to the included angle between a connecting line of P, P' and a theoretical axis of a positioning pin, and determine the thickness of a bottom surface grinding or padding on the component where the space intersection point is located and the translation distance of the component according to the difference between the size of two directions P and the theoretical size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310685284.1A CN116753803A (en) | 2023-06-09 | 2023-06-09 | Method for directly measuring size of space intersection point in catheter positioning welding clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310685284.1A CN116753803A (en) | 2023-06-09 | 2023-06-09 | Method for directly measuring size of space intersection point in catheter positioning welding clamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116753803A true CN116753803A (en) | 2023-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310685284.1A Pending CN116753803A (en) | 2023-06-09 | 2023-06-09 | Method for directly measuring size of space intersection point in catheter positioning welding clamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116753803A (en) |
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2023
- 2023-06-09 CN CN202310685284.1A patent/CN116753803A/en active Pending
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