CN108917559B - Simple and easy macroporous chamfer measuring tool - Google Patents
Simple and easy macroporous chamfer measuring tool Download PDFInfo
- Publication number
- CN108917559B CN108917559B CN201810837310.7A CN201810837310A CN108917559B CN 108917559 B CN108917559 B CN 108917559B CN 201810837310 A CN201810837310 A CN 201810837310A CN 108917559 B CN108917559 B CN 108917559B
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- measuring
- mandrel
- sleeve
- bracket
- shaft
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- 238000003825 pressing Methods 0.000 claims abstract description 28
- 238000005259 measurement Methods 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a simple large-hole chamfer measuring tool, which comprises a measuring sleeve and a measuring mandrel, wherein the measuring mandrel is arranged in a guide hole of the measuring sleeve in a sliding way, the measuring mandrel is a stepped shaft body, the upper part of the measuring mandrel is a small guiding shaft, the lower part of the measuring mandrel is a large conical shaft, the conical angle of the large shaft is consistent with the chamfer conical surface of an orifice to be measured, and the connecting part of the large shaft and the small shaft forms a limiting surface; the guide hole of the measuring sleeve is a counter bore and is in clearance fit with the measuring mandrel; the upper end of the measuring sleeve is vertically provided with a bracket, the upper part of the bracket is provided with a measuring mechanism, and the lower part of the bracket is fixedly provided with a spring and is connected with the measuring mandrel through the spring; the support also comprises a pressing shaft, a perforation is formed in the middle of the support, and the pressing shaft penetrates through the perforation and is fixed at the upper end of the measuring mandrel. The invention has the advantages of compact structure, high measurement precision, high measurement efficiency and the like.
Description
Technical Field
The invention relates to the technical field of hole machining, in particular to a simple large hole chamfer measuring tool.
Background
The engine parts need to be executed three-check in the machining process to ensure that the dimensions meet the requirements of drawing, and in order to accurately and rapidly measure the depth and the diameter of the large hole chamfer in the process of doing three-check, a simple and suitable measuring tool is needed, if the production site does not have the simple and suitable measuring tool, the conventional vernier caliper, the depth gauge, the angle gauge and the like are relied on for measurement, and then the measurement is manually carried out, so that errors and inefficiency are easily caused, the production is influenced, and the batch processing disqualification caused by misjudgment is likely to be caused, thereby influencing the assembly quality potential safety hazard of the engine.
The foregoing background is only for the purpose of facilitating an understanding of the principles and concepts of the application and is not necessarily in the prior art to the present application and is not intended to be used as an admission that such background is not entitled to antedate such novelty and creativity by virtue of prior application or that it is already disclosed at the date of filing of this application.
Disclosure of Invention
The invention aims to provide a large hole chamfer measuring tool which has the advantages of compact structure, high measuring precision and high measuring efficiency.
Preferably, the present invention may further have the following technical features:
The simple large-hole chamfer measuring tool comprises a measuring sleeve and a measuring mandrel, wherein the measuring sleeve is provided with an axial guide hole, the upper part of the measuring sleeve is provided with a step, and the height of the step is a conversion value of a chamfer diameter tolerance of an orifice to be measured; the measuring mandrel is arranged in the guide hole of the measuring sleeve in a sliding way,
The measuring mandrel is a stepped shaft body, the upper part of the measuring mandrel is a small guiding shaft, the lower part of the measuring mandrel is a large conical shaft, the conical surface angle is consistent with the chamfer conical surface of the orifice to be measured, and the connecting part of the large shaft and the small shaft forms a limiting surface;
The guide hole of the measuring sleeve is a counter bore and is in clearance fit with the measuring mandrel;
The upper end of the measuring sleeve is vertically provided with a bracket, the upper part of the bracket is provided with a measuring mechanism, and the lower part of the bracket is fixedly provided with a spring and is connected with the measuring mandrel through the spring;
the support also comprises a pressing shaft, a perforation is formed in the middle of the support, and the pressing shaft penetrates through the perforation and is fixed at the upper end of the measuring mandrel.
Further, a step-shaped observation port is formed in the side wall of the lower portion of the measuring sleeve and used for assisting the measuring mandrel to align with the chamfer of the orifice to be measured.
Further, an amplifying lens is arranged at the observation port; the side wall of the observation port is provided with a guide groove for assembling the amplifying lens.
Further, a spring accommodating hole is formed in the upper portion of the measuring mandrel, the upper end of the spring is fixedly connected with the lower portion of the support, and the lower end of the spring is fixedly connected with the bottom of the accommodating hole; the lower part of the bracket is provided with a spring guide sleeve.
Further, the centers of the perforation of the bracket, the accommodating hole of the measuring mandrel and the spring guide sleeve are coaxial; the pressing shaft penetrates through the through hole and is fixed at the bottom of the containing hole.
Further, the pressing shaft is in threaded connection with the bottom of the accommodating hole.
Further, the measuring mechanism comprises a dial indicator, a connecting rod and a connecting block, wherein the connecting block is provided with a connecting hole and is fixed on the upper part of the bracket, the connecting rod is slidably arranged in the connecting hole, and the end part of the connecting rod is provided with the dial indicator.
Further, the upper end of the pressing shaft is provided with a cake-shaped pressing block.
Further, the measuring bush is cast integrally with the bracket.
Compared with the prior art, the invention has the beneficial effects that:
(1) The measuring sleeve and the bracket are cast into a whole, so that the reference precision of the measuring sleeve is improved, and the processing is convenient;
(2) The measuring spindle is contracted into the measuring sleeve in a normal state, and the limiting surface of the measuring spindle is abutted with the guide hole in the measuring sleeve to prevent the measuring spindle from sliding out of the measuring sleeve or being bumped by an object extending out of the measuring sleeve;
(3) During measurement, the pressing shaft is pressed down, whether the measuring mandrel is aligned with the chamfer of the orifice to be measured or not is observed through the observation port, so that the measurement efficiency is effectively improved, unnecessary damage caused by excessive measuring mandrels colliding with the chamfer of the orifice to be measured is avoided, the pressing shaft pushes the measuring mandrel to move downwards, and because of the elasticity, an operator can better control the pressing speed of the measuring mandrel, and therefore the position accuracy of the measuring mandrel is controlled;
(4) A measuring mechanism is arranged to detect the height difference between the upper end of the measuring mandrel and the step surface of the measuring sleeve, and whether the diameter tolerance of the chamfer of the orifice to be measured is qualified or not is accurately fed back through the reading of the measuring meter;
(5) The centers of the pressing shaft, the spring and the accommodating hole of the measuring sleeve are coaxial, the force application point is arranged on the central axis of the measuring sleeve, the stability during measurement is higher, and the measuring sleeve cannot incline due to uneven stress and influence the measurement precision.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a cross-sectional view of a measurement sleeve of the present invention;
FIG. 4 is a front view of a measurement spindle of the present invention;
Fig. 5 is an enlarged view of a portion a of fig. 3;
FIG. 6 is a schematic diagram of the operation of an magnifying lens;
Fig. 7 is a schematic bottom view of fig. 6.
Detailed Description
The invention will be described in further detail with reference to the following detailed description and with reference to the accompanying drawings. It should be emphasized that the following description is merely exemplary in nature and is in no way intended to limit the scope of the invention or its applications.
Non-limiting and non-exclusive embodiments will be described with reference to the following drawings, in which like reference numerals refer to like elements unless otherwise specified.
Referring to the simple large-hole chamfer measuring tool shown in fig. 1-4, the simple large-hole chamfer measuring tool comprises a measuring sleeve 1 and a measuring mandrel 2, wherein an axial countersunk guide hole 11 is formed in the measuring sleeve 1, a step 12 is formed in the upper portion of the measuring sleeve 1, and the height of the step 12 is a conversion value of a chamfer diameter tolerance of an orifice to be measured. The measuring mandrel 2 is arranged in the guide hole 11 in a sliding way, and the measuring mandrel and the guide hole are in clearance fit, and the clearance is 0.009-0.015mm. The measuring mandrel 2 is a stepped shaft body and is matched with the guide hole 11, the upper part of the measuring mandrel is a small shaft serving as a guide, the lower part of the measuring mandrel is a large shaft with a conical surface, the angle of the conical surface is consistent with the chamfer conical surface of the orifice to be measured, and the connecting part of the large shaft and the small shaft forms a limiting surface. The upper end of the measuring sleeve 1 is vertically provided with a support 4, and the measuring sleeve 1 and the support 4 are cast into a whole to improve the overall reference measuring precision of the measuring sleeve.
The upper part of the bracket is provided with a measuring mechanism which comprises a dial indicator 7, a connecting rod 61 and a connecting block 6, wherein the connecting block 6 is fixed on the upper part of the bracket 4 through bolts or direct welding, the connecting block 6 is provided with a horizontal connecting hole for assembling the connecting rod 61, and the connecting rod 61 is tightly matched with the connecting hole. One end of the connecting rod 61 penetrates into the connecting hole and can stretch and slide in the connecting hole, and the other end of the connecting rod is provided with a positioning hole for assembling the dial indicator 7. During measurement, the pointer of the dial indicator 7 is propped against the upper end face of the step 12 of the measuring sleeve, the pointer is adjusted to 0, the difference value between the upper end face of the step 12 of the measuring sleeve 1 and the upper end face of the measuring mandrel 2 of the dial indicator is accurately read out through the moving connecting rod 61, the operation method that whether the tolerance is qualified or not is avoided by hand, the detection precision is improved, and an operator can accurately grasp the diameter tolerance of the orifice chamfer through the numerical value of the dial indicator in the prior art.
The lower part of the bracket 4 is fixed with a spring 3, and the lower part of the bracket 4 is provided with a spring guide sleeve 53. The upper part of the measuring mandrel 2 is provided with a spring accommodating hole 21, the diameter of the accommodating hole 21 is larger than that of the spring 3, the upper end of the spring 3 is arranged in the guide sleeve 53 and is fixed with the bracket 4, and the lower end of the spring 3 is arranged in the accommodating hole 21 and is fixed at the bottom of the accommodating hole 21. In a normal state, two ends of the spring are respectively connected with the bracket and the measuring mandrel, and at the moment, the spring is in an elongated state and has a certain stretching elasticity, so that the measuring mandrel is pulled into the measuring sleeve.
As a further improved technical scheme, the support 4 is further provided with a pressing shaft 51, and a perforation for inserting the pressing shaft 51 is formed in the middle of the support 4. The perforation is coaxial with the centre of the receiving hole 21 of the measuring spindle 2. The upper end of the pressing shaft 51 is provided with a cake-shaped pressing block 5, so that the pressing shaft 51 can be conveniently pressed down. The lower end of the pressing shaft 51 is provided with a screw thread which passes through the through hole and the spring 3 in sequence and is finally screwed at the bottom of the accommodating hole 21. The upper part of the bracket 4 is also provided with an orientation guide sleeve 52, the diameter of which is matched with the diameter of the pressing shaft 51, so as to improve the stability of the movement of the pressing shaft 51.
In order to further improve the measuring effect, a step-shaped observation port 13 is formed in the side wall of the lower part of the measuring sleeve 1 and is used for assisting the measuring mandrel 2 to align with the chamfer of the orifice to be measured. An amplifying lens 15 is also arranged at the observation port 13; the side wall of the observation port 13 is provided with a guide groove 14, and the magnifying lens 15 is assembled in the guide groove 14 and can move along the guide groove 14. During measurement, the pressing shaft 51 is pressed down, and whether the measuring mandrel 2 is aligned with the chamfer of the orifice to be measured or not is observed through the observation port 13; the amplifying lens 15 can be pulled down to observe whether the conical surface of the measuring mandrel 2 and the chamfer to be measured have a gap or not, so that the roundness of the section of the chamfer is judged in an auxiliary mode, the measuring efficiency and the measuring precision are effectively improved, and unnecessary damage caused by collision between excessive measuring mandrels and the chamfer of the orifice to be measured is avoided.
Before measurement, the pointer of the dial indicator 7 is propped against the upper end face of the measuring mandrel 2, the pointer reading is adjusted to 0, the pressing shaft 51 is pressed down, the conical surface of the measuring mandrel 2 is tightly attached to the chamfer to be measured, and the reading of the dial indicator 7 is read, so that the depth of the chamfer to be measured can be obtained.
When the diameter tolerance and the chamfer depth of the chamfer to be measured are measured, whether the clearance exists between the conical surface of the measuring mandrel and the chamfer to be measured or not is observed through the magnifying lens 15, and factors possibly causing disqualification of the diameter tolerance and the chamfer depth of the chamfer to be measured are clearly mastered. If the conical surface of the mandrel and the chamfer to be measured are measured, the clearance can be detected by using a feeler gauge.
Those skilled in the art will recognize that numerous variations are possible in light of the above description, and that the examples and figures are presented for the purpose of describing one or more particular embodiments only.
While there have been described and illustrated what are considered to be example embodiments of the present invention, it will be understood by those skilled in the art that various changes and substitutions can be made therein without departing from the spirit of the invention. In addition, many modifications may be made to adapt a particular situation to the teachings of the invention without departing from the central concept thereof as described herein. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the invention and equivalents thereof.
Claims (1)
1. The simple large-hole chamfer measuring tool comprises a measuring sleeve and a measuring mandrel, wherein the measuring sleeve is provided with an axial guide hole, the upper part of the measuring sleeve is provided with a step, and the height of the step is a conversion value of a chamfer diameter tolerance of an orifice to be measured; the measuring mandrel is arranged in the guide hole of the measuring sleeve in a sliding way, and is characterized in that:
the measuring mandrel is a stepped shaft body, the upper part of the measuring mandrel is a small guiding shaft, the lower part of the measuring mandrel is a large conical shaft, the conical surface angle is consistent with the chamfer conical surface of the orifice to be measured, and the connecting part of the large shaft and the small shaft forms a limiting surface;
The guide hole of the measuring sleeve is a counter bore and is in clearance fit with the measuring mandrel;
The upper end of the measuring sleeve is vertically provided with a bracket, the upper part of the bracket is provided with a measuring mechanism, and the lower part of the bracket is fixedly provided with a spring and is connected with the measuring mandrel through the spring;
The bracket also comprises a pressing shaft, a perforation is formed in the middle of the bracket, and the pressing shaft penetrates through the perforation and is fixed at the upper end of the measuring mandrel;
The side wall of the lower part of the measuring sleeve is provided with a stepped observation port for assisting the measuring mandrel to align with the chamfer of the orifice to be measured;
The measuring mechanism comprises a dial indicator, a connecting rod and a connecting block, wherein the connecting block is provided with a connecting hole and is fixed on the upper part of the bracket, the connecting rod is slidably arranged in the connecting hole, and the end part of the connecting rod is provided with the dial indicator;
During measurement, a pointer of the dial indicator is propped against the upper end face of the step of the measuring sleeve, the pointer is adjusted to 0, and the difference value of the dial indicator on the upper end face of the step of the measuring sleeve and the upper end face of the measuring mandrel is accurately read out through a movable connecting rod, so that an operation method that whether the tolerance is qualified or not is avoided by hand, the detection precision is improved, and an operator can accurately grasp the diameter tolerance of the orifice chamfer through the numerical value of the dial indicator in the prior art;
an amplifying lens is further arranged at the observation port; a guide groove is formed in the side wall of the observation port for assembling the magnifying lens;
the upper part of the measuring mandrel is provided with a spring accommodating hole, the upper end of the spring is fixedly connected with the lower part of the bracket, and the lower end of the spring is fixedly connected with the bottom of the accommodating hole; the lower part of the bracket is provided with a spring guide sleeve;
The centers of the perforation of the bracket, the accommodating hole of the measuring mandrel and the spring guide sleeve are coaxial; the pressing shaft penetrates through the through hole and is fixed at the bottom of the accommodating hole;
the pressing shaft is in threaded connection with the bottom of the accommodating hole; the upper end of the pressing shaft is provided with a cake-shaped pressing block; the measuring sleeve and the bracket are cast into a whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810837310.7A CN108917559B (en) | 2018-07-26 | 2018-07-26 | Simple and easy macroporous chamfer measuring tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810837310.7A CN108917559B (en) | 2018-07-26 | 2018-07-26 | Simple and easy macroporous chamfer measuring tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108917559A CN108917559A (en) | 2018-11-30 |
| CN108917559B true CN108917559B (en) | 2024-05-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810837310.7A Active CN108917559B (en) | 2018-07-26 | 2018-07-26 | Simple and easy macroporous chamfer measuring tool |
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| CN (1) | CN108917559B (en) |
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| Publication number | Publication date |
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| CN108917559A (en) | 2018-11-30 |
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