CN113118474A - Detection-free flange step hole machining method - Google Patents
Detection-free flange step hole machining method Download PDFInfo
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- CN113118474A CN113118474A CN202110345600.1A CN202110345600A CN113118474A CN 113118474 A CN113118474 A CN 113118474A CN 202110345600 A CN202110345600 A CN 202110345600A CN 113118474 A CN113118474 A CN 113118474A
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- 238000003754 machining Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 20
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 description 4
- 238000007689 inspection Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000004438 eyesight Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B1/00—Methods for turning or working essentially requiring the use of turning-machines; Use of auxiliary equipment in connection with such methods
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turning (AREA)
Abstract
The invention belongs to the field of flanges, and particularly relates to a detection-free method for machining a flange step hole, which comprises the following steps: (1) assembling the flange blank on a lathe, and starting the lathe to machine a middle through hole; (2) starting a lathe to process a step; (3) after the step is machined, withdrawing the turning tool to the initial position in the step (2), starting the turning machine again, rotating the flange blank with the step hole for at least one circle, and closing the turning machine; the initial position in the step (3) refers to a position where the turning tool abuts against the flange before the lathe is started in the step (2). After the steps are machined, the turning tool is withdrawn to the initial position, the turning tool is started again, the flange rotates, if the flange is inclined in the machining process, the turning tool can be scratched on the surface of the flange by the final rotation of the flange, the mark is directly marked on an unqualified product in the machining process, the unqualified product with the corresponding mark is only required to be picked out subsequently, a graduated scale or a comparison piece is not required for detection, and time and labor are saved.
Description
Technical Field
The invention belongs to the field of flanges, and particularly relates to a detection-free method for machining a stepped hole of a flange.
Background
The flange connection is a sealing structure, has the advantages of simple structure, low cost, repeated disassembly and the like, and is widely applied to petrochemical equipment and pipelines. The flange is used as a sealing structure, the main failure mode is leakage, media in most devices or containers in the petrochemical industry are inflammable and explosive, safety accidents such as combustion and explosion are easily caused when leakage occurs, and the accidents bring economic loss to enterprises and threaten the life safety of the environment and people. For the flange with the step hole, after the flange is installed on equipment such as a pipeline, the sealing is mainly realized by the close fit between the step of the step hole on the flange and the pipeline, and the like, so that the inspection of the dimensional accuracy of the step hole is vital after the flange is manufactured, and once the problems of the inclination of the step surface, the larger depth of the step hole and the like occur, the sealing effect of the flange is directly influenced, and the leakage is caused.
However, in the process of obtaining the stepped hole by processing the flange blank through the lathe, the flange blank may slightly move due to external factors such as cutting force of the lathe, so that the flange blank inclines, and once the flange blank inclines, the stepped hole obtained by processing the lathe has the condition that the step surface on one side is high and the step surface on one side is low.
In order to avoid the above situation, the flange is subjected to full inspection after being processed, usually, an inspector measures the stepped hole by using a graduated scale, or determines whether the depth of the stepped hole is qualified by using a height comparison member with a set height to compare the height with the height of the stepped hole, and the inspection method not only needs to consume a lot of manpower, but also is a test for the eyesight of the inspector. In view of this, it is considered necessary to reduce the difficulty of detection by improving the processing method.
Disclosure of Invention
In order to solve the problems, the invention discloses a detection-free flange step hole machining method, which comprises the steps of withdrawing a turning tool to an initial position after machining steps, starting the turning tool again to rotate a flange blank with the step hole, and enabling the turning tool to leave scratches on the surface of the flange blank by final rotation of the flange blank if the flange blank inclines due to external force in the machining process, namely directly marking unqualified products in the machining process, and directly selecting the unqualified products with corresponding marks subsequently without adopting a scale or a comparison part for detection, thereby saving time and labor.
In order to achieve the purpose, the invention adopts the following technical scheme:
a detection-free flange step hole machining method comprises the following steps:
(1) assembling the flange blank on a lathe, and starting the lathe to machine a middle through hole;
(2) starting a lathe to process a step;
(3) after the step is machined, withdrawing the turning tool to the initial position in the step (2), starting the turning machine again, rotating the flange blank with the step hole for at least one circle, and closing the turning machine;
the initial position in the step (3) refers to a position where the turning tool just abuts against the flange blank before the turning machine is started in the step (2).
Preferably, in the step (3), after the lathe is restarted, the flange blank having the stepped hole formed therein is rotated once.
Preferably, the flange blank in the step (1) is made of steel.
Preferably, the flange blank in the step (1) is carbon steel.
The invention has the following beneficial effects:
(1) according to the detection-free flange step hole machining method, after the step is machined, the lathe tool is made to withdraw to the initial position where the lathe tool just can abut against the flange blank before the step is machined, then the lathe tool is started again, the flange blank with the step hole is machined to rotate, if the flange blank inclines due to external force in the machining process, the final rotation of the flange blank can enable the lathe tool to leave scratches on the surface of the flange blank, namely, the unqualified product is directly marked in the machining process, the unqualified product with the corresponding mark is directly selected subsequently, a graduated scale or a comparison piece is not needed for detection, and time and labor are saved;
(2) after the steps are machined, the turning tool is moved back to the initial position, the flange is rotated for one circle, and if the flange is inclined, the turning tool can leave scratches on the surface of the flange.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a photograph of a VF flange good;
fig. 2 is a photograph of a VF flange reject.
Detailed Description
The present invention will now be described in further detail with reference to examples.
The detection-free flange step hole machining method comprises the following steps:
(1) assembling the flange blank on a lathe, and starting the lathe to machine a middle through hole;
(2) starting a lathe to process a step;
(3) and (3) after the step is machined, enabling the turning tool to withdraw from the position before the turning tool is started in the step (2), enabling the turning tool to just abut against the position of the flange blank, starting the turning tool again, enabling the flange blank machined with the step hole to rotate at least one circle, and closing the turning tool.
And (3) before the lathe is started in the step (2), recording the position where the lathe tool just can abut against the flange blank as the initial position of the lathe tool, and withdrawing the lathe tool to the initial position after the step in the step (3) is finished.
And (2) the flange blank in the step (1) is made of steel.
The flange blank in the step (1) is carbon steel.
And (3) after the lathe is started again, rotating the flange blank with the step hole for one circle.
Examples
(1) Assembling the forged VF flange blank on a lathe, starting the lathe to machine a through hole in the middle of the flange, and withdrawing the lathe tool;
(2) adjusting the position of the turning tool, and starting the turning tool to machine steps of the flange around the through hole;
(3) and withdrawing the lathe tool to the initial position, starting the lathe again, rotating the VF flange for one circle, closing the lathe, moving away the lathe tool, and taking down the processed VF flange.
If the flange is not inclined in the machining process, no mark is left on the surface of the flange after the operation of the step (3); if the flange is inclined (even very slightly inclined) due to cutting force or the like during machining, scratches are left on the surface of the flange after the operation of step (3). A detection person only needs to check whether the surface of the flange has scratches or not to judge whether the stepped hole is qualified or not.
The step hole machining method is equivalent to directly marking unqualified products with unqualified marks in the machining process to replace detection, and only the unqualified products with the corresponding marks need to be selected subsequently, so that time and labor are saved.
FIG. 1 shows the quality of VF flange, smooth surface and no scratch. Fig. 2 is a VF flange failing sheet, and it can be seen from the figure that the VF flange surface has an obvious scratch, and only the unqualified product with the scratch needs to be screened out.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (4)
1. The detection-free method for machining the stepped hole of the flange is characterized by comprising the following steps of: the method comprises the following steps:
(1) assembling the flange blank on a lathe, and starting the lathe to machine a middle through hole;
(2) starting a lathe to process a step;
(3) after the step is machined, withdrawing the turning tool to the initial position in the step (2), starting the turning machine again, rotating the flange blank with the step hole for at least one circle, and closing the turning machine;
the initial position in the step (3) refers to a position where the turning tool just abuts against the flange blank before the turning machine is started in the step (2).
2. The detection-free flange step hole machining method of claim 1, wherein: and (3) after the lathe is started again, rotating the flange blank with the step hole for one circle.
3. The detection-free flange step hole machining method of claim 1, wherein: and (2) the flange blank in the step (1) is made of steel.
4. The detection-free flange step hole machining method of claim 1, wherein: the flange blank in the step (1) is carbon steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110345600.1A CN113118474B (en) | 2021-03-31 | 2021-03-31 | Detection-free flange step hole machining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110345600.1A CN113118474B (en) | 2021-03-31 | 2021-03-31 | Detection-free flange step hole machining method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113118474A true CN113118474A (en) | 2021-07-16 |
| CN113118474B CN113118474B (en) | 2022-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110345600.1A Active CN113118474B (en) | 2021-03-31 | 2021-03-31 | Detection-free flange step hole machining method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3293604A (en) * | 1963-01-25 | 1966-12-20 | Rca Corp | Character recognition system utilizing asynchronous zoning of characters |
| DE69331433D1 (en) * | 1992-10-22 | 2002-02-14 | Advanced Interconnection Tech | Device for the automatic optical inspection of printed circuit boards with wires laid therein |
| CN105571971A (en) * | 2016-02-04 | 2016-05-11 | 华侨大学 | Single-girt continuous scratching test method for pre-maintaining nonferrous metal test piece through diamond cutter |
| CN210304639U (en) * | 2019-07-28 | 2020-04-14 | 东莞市巨升电子科技有限公司 | Bad detection device of crew cut of lathe |
| CN111112645A (en) * | 2019-12-25 | 2020-05-08 | 江苏远方动力科技有限公司 | Machining method for improving machining precision and perpendicularity of motor flange hole |
| CN211052540U (en) * | 2019-11-23 | 2020-07-21 | 济南鸿奥机械配件有限公司 | Calibration device for lathe fixture |
-
2021
- 2021-03-31 CN CN202110345600.1A patent/CN113118474B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3293604A (en) * | 1963-01-25 | 1966-12-20 | Rca Corp | Character recognition system utilizing asynchronous zoning of characters |
| DE69331433D1 (en) * | 1992-10-22 | 2002-02-14 | Advanced Interconnection Tech | Device for the automatic optical inspection of printed circuit boards with wires laid therein |
| CN105571971A (en) * | 2016-02-04 | 2016-05-11 | 华侨大学 | Single-girt continuous scratching test method for pre-maintaining nonferrous metal test piece through diamond cutter |
| CN210304639U (en) * | 2019-07-28 | 2020-04-14 | 东莞市巨升电子科技有限公司 | Bad detection device of crew cut of lathe |
| CN211052540U (en) * | 2019-11-23 | 2020-07-21 | 济南鸿奥机械配件有限公司 | Calibration device for lathe fixture |
| CN111112645A (en) * | 2019-12-25 | 2020-05-08 | 江苏远方动力科技有限公司 | Machining method for improving machining precision and perpendicularity of motor flange hole |
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| CN113118474B (en) | 2022-05-03 |
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Effective date of registration: 20240408 Address after: No.7, building e, phase I of SME apartment, Pingfang District, Harbin City, Heilongjiang Province Patentee after: Harbin yongrunxin Machinery Manufacturing Co.,Ltd. Country or region after: China Address before: No.18, Zhengqiang Road, Xinbei District, Changzhou City, Jiangsu Province, 213000 Patentee before: CHANGZHOU DAGU HYDRAULIC EQUIPMENT Co.,Ltd. Country or region before: China |
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