CN115041929A - High-precision blind hole machining method - Google Patents
High-precision blind hole machining method Download PDFInfo
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- CN115041929A CN115041929A CN202210796859.2A CN202210796859A CN115041929A CN 115041929 A CN115041929 A CN 115041929A CN 202210796859 A CN202210796859 A CN 202210796859A CN 115041929 A CN115041929 A CN 115041929A
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- honing
- reaming
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- finish
- rough
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The invention discloses a high-precision blind hole processing method, which comprises the steps of drilling, boring, rough reaming and honing, semi-fine reaming and honing and fine reaming and honing, wherein the rotating speed of a main shaft is 600 +/-10 r/min during the rough reaming and honing, and the feeding speed is 80 +/-5 mm/min; semi-finish reaming and honing, wherein the main shaft rotating speed is 500 +/-10 r/min, and the feeding speed is 60 +/-5 mm/min. The machining precision and the machining efficiency are high, and the machining economy is good.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a high-precision blind hole machining method.
Background
A certain product to be processed has eight blind holes, and the tool withdrawal groove in the blind hole is only 2mm, and the size requirement is as follows: the dimensional tolerance is within 0.005, the roughness is Ra0.4, and the cylindricity is 0.004. The high precision requirements of the parts and the structures of the parts and the holes determine that the parts and the holes are difficult to achieve by common machining methods, such as reaming, grinding and grinding. The only machining method that can be tried is honing, but there are significant problems.
The hole processed by the honing method can achieve higher dimensional accuracy, shape accuracy and surface roughness. However, the width of the tool withdrawal groove of the blind hole of the processed part cannot be too short, and is at least 5mm and more. If the width of the tool withdrawal groove of the hole is too short, the abrasion amount of the oilstone at the head of the honing head is rapidly accelerated, so that the precision of honing the hole is deteriorated and the design requirement cannot be met. If the requirement is met, the honing head is required to be ensured to have high processing precision and matching precision, and the requirement is met by repeatedly finishing honing oilstones.
In addition, the honing process requires high precision of the previous process and is generally guaranteed by a grinding processing method. And for some parts with special shapes, heavy weight, short tool withdrawal groove, structures such as sink platforms, multiple holes and the like in the processing hole, the precision required before honing is difficult to achieve by a grinding processing method. Therefore, the honing method is used for processing the blind hole with high precision and short tool withdrawal groove, and has high processing difficulty and poor economical efficiency.
In summary, it is necessary to develop a new processing method to try and apply a processing tool and a processing technology that are not involved in processing qualified products with high efficiency, high quality and high economy.
Disclosure of Invention
The invention aims to provide a high-precision blind hole machining method which is high in machining precision and machining efficiency and good in machining economy.
The invention relates to a high-precision blind hole processing method, which comprises the steps of drilling, boring, rough reaming and honing, semi-fine reaming and honing and fine reaming and honing, wherein the rotating speed of a main shaft is 600 +/-10 r/min during the rough reaming and honing, and the feeding speed is 80 +/-5 mm/min; semi-finish reaming and honing, wherein the main shaft rotating speed is 500 +/-10 r/min, and the feeding speed is 60 +/-5 mm/min.
Further, the rough reaming and honing hole is specifically as follows: measuring the aperture after boring, then determining the excircle diameter of the rough reaming and honing cutter whetstone according to the rough reaming and honing allowance, wherein the excircle diameter of the rough reaming and honing cutter whetstone is the sum of the aperture after boring and the rough reaming and honing allowance, clamping the rough reaming and honing cutter, and starting a processing procedure to perform rough reaming and honing.
Further, semi-finish reaming honing hole specifically is: measuring the aperture after rough reaming and honing, then determining the excircle diameter of the semi-finish reaming and honing tool oilstone according to the semi-finish reaming and honing allowance, wherein the excircle diameter of the semi-finish reaming and honing tool oilstone is the sum of the aperture after rough reaming and honing and the semi-finish reaming and honing allowance, clamping the semi-finish reaming and honing tool, and starting a machining procedure to semi-finish reaming and honing.
Further, the finely reaming and honing holes specifically comprise: measuring the aperture after the semi-finish reaming and honing, then determining the excircle diameter of the finish reaming and honing tool whetstone according to the finish reaming and honing allowance, wherein the excircle diameter of the finish reaming and honing tool whetstone is the sum of the aperture after the semi-finish reaming and honing allowance, clamping the finish reaming and honing tool, and starting a processing procedure to finish reaming and honing.
Further, the drilling, boring, rough reaming and honing, semi-fine reaming and honing and fine reaming and honing are finished in the same machining center.
Compared with the prior art, the invention has the following beneficial effects.
1. Compared with conventional honing, the method has lower requirements on the processing precision of parts before reaming and honing, and further the prior process does not need to adopt high-precision processing modes such as grinding and the like. And the reaming and honing is different from the reciprocating processing of honing, only single-stroke processing is needed like a reamer, and parts can finish all the steps from drilling, boring to reaming and honing in one-time clamping, so that the requirements of final product drawings are met, secondary clamping and carrying are avoided, the processing position precision is ensured, and the processing efficiency is improved.
2. The reaming and honing technology combines the advantages of reaming and honing through reaming and honing, namely rough reaming and honing, semi-fine reaming and honing and fine reaming and honing, not only can obtain the processing precision which is similar to the processing method of honing, but also can perform the expanding cutter and compensation in the diameter direction after the oilstone is worn, the expanding cutter amount is not less than 2mm, the service life of the reaming and honing cutter is prolonged, and the use cost is reduced. The single-stroke machining can be realized like a reaming machining method, and high machining efficiency is obtained. The method is particularly suitable for processing parts which are heavy, have irregular shapes, have short tool withdrawal grooves, have sunk platforms in processing holes, and have high requirements on shape precision, size precision and surface roughness.
3. The invention can complete drilling, boring, rough reaming and honing, semi-fine reaming and honing and fine reaming and honing in the same processing center, and can realize the corresponding process steps by replacing the drill, the boring tool and the reaming and honing tool on the main shaft of the processing center without purchasing a special reaming and honing machine.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A high-precision blind hole processing method comprises drilling, boring, rough reaming and honing, semi-fine reaming and honing and fine reaming and honing, wherein the rotating speed of a main shaft is 600r/min during rough reaming and honing, and the feeding speed is 80 mm/min; semi-finish reaming and honing, wherein the main shaft rotating speed is 500r/min when the finish reaming and honing is carried out, and the feeding speed is 60 mm/min. The method specifically comprises the following steps:
clamping and fixing a rough reaming honing tool, a semi-fine reaming honing tool and a fine reaming honing tool on a tool handle of a vertical machining center;
finishing preprocessing of holes before reaming and honing on a vertical machining center, wherein the preprocessing comprises drilling, milling a hole bottom tool withdrawal groove and boring;
step three, carrying out rough reaming and honing, specifically: measuring the bore diameter after boring, then determining the excircle diameter of the rough reaming and honing cutter whetstone according to the rough reaming and honing allowance, wherein the excircle diameter of the rough reaming and honing cutter whetstone is the sum of the bore diameter after boring and the rough reaming and honing allowance, measuring the excircle diameter between two symmetrically arranged whetstones on the reaming and honing cutter by using an external micrometer, and increasing or reducing the excircle diameter of the whetstone to a required value by rotating a disc on the reaming and honing cutter. And switching the machining cutter to a rough reaming honing cutter, and starting a machining program to perform rough reaming and honing on the hole.
Step four, carrying out semi-finish reaming and honing, specifically comprising the following steps: measuring the aperture after rough reaming and honing, then determining the excircle diameter of the semi-finish reaming and honing tool oilstone according to the semi-finish reaming and honing allowance, wherein the excircle diameter of the semi-finish reaming and honing tool oilstone is the sum of the aperture after rough reaming and honing and the semi-finish reaming and honing allowance, and the measurement and adjustment of the excircle diameter of the semi-finish reaming and honing tool oilstone are performed in the third step. And switching the machining cutter to be a semi-finish reaming honing cutter, and starting a machining program to semi-finish reaming and honing holes.
Step five, finely reaming and honing the hole, which specifically comprises the following steps: measuring the aperture of the semi-finish reaming and honing hole, then determining the excircle diameter of the finish reaming and honing tool whetstone according to the finish reaming and honing allowance, wherein the excircle diameter of the finish reaming and honing tool whetstone is the sum of the aperture of the semi-finish reaming and honing hole and the finish reaming and honing allowance, and the measuring and adjusting of the excircle diameter of the finish reaming and honing tool whetstone are the same as the third step. And switching the machining cutter to a finish reaming honing cutter, and starting a machining program to finish reaming and honing the hole.
The drilling, boring, rough reaming and honing, semi-fine reaming and honing and fine reaming and honing are finished in the same processing center, the drilling cutter, the boring cutter and the reaming and honing cutter are replaced on the main shaft of the processing center, the corresponding process steps can be realized, a special reaming and honing machine is not required to be purchased, the reaming and honing processing can be realized by utilizing conventional equipment such as the conventional vertical processing center or the conventional horizontal processing center and the like without replacing cutting fluid, the utilization rate of the conventional equipment can be improved, the equipment cost for purchasing the reaming and honing machine can be saved, and the popularization and application of the equipment are facilitated.
And (3) allocating machining allowance: the aperture after drilling is phi 19.5, the aperture after boring is phi 20, the aperture after rough reaming and honing is phi 20.01, the aperture after semi-fine reaming and honing is phi 20.02, and the aperture after fine reaming and honing is phi 20.025.
Reaming and honing tool oilstone granularity: the rough reaming and honing cutter is 180 #; the semi-finish reaming honing tool is 280 #; the finishing reaming honing tool is 320 #.
It should be noted that, in the debugging process, it is inevitably necessary to adjust the allowance distribution and the cutting parameters of the drilling, boring, rough reaming and honing, semi-fine reaming and honing, and fine reaming and honing, so as to determine the optimal machining allowance and cutting parameters.
Compared with conventional honing, the method has lower requirements on the processing precision of parts before reaming and honing, and further the prior process does not need to adopt high-precision processing modes such as grinding and the like. And the reaming and honing is different from the reciprocating processing of honing, only single-stroke processing is needed like a reamer, and parts can finish all the steps from drilling, boring to reaming and honing in one-time clamping, so that the requirements of final product drawings are met, secondary clamping and carrying are avoided, the processing position precision is ensured, and the processing efficiency is improved.
The reaming and honing technology combines the advantages of reaming and honing through reaming and honing, namely rough reaming and honing, semi-fine reaming and honing and fine reaming and honing, not only can obtain the processing precision which is similar to the processing method of honing, but also can perform the expanding cutter and compensation in the diameter direction after the oilstone is worn, the expanding cutter amount is not less than 2mm, the service life of the reaming and honing cutter is prolonged, and the use cost is reduced. The single-stroke machining can be realized like a reaming machining method, and high machining efficiency is obtained. The method is particularly suitable for processing parts which are heavy, have irregular shapes, have short tool withdrawal grooves, have sunk platforms in processing holes, and have high requirements on shape precision, size precision and surface roughness.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (5)
1. A high-precision blind hole machining method is characterized by comprising the following steps: the method comprises the steps of drilling, boring, rough reaming and honing, semi-fine reaming and honing and fine reaming and honing, wherein the main shaft rotating speed is 600 +/-10 r/min during the rough reaming and honing, and the feeding speed is 80 +/-5 mm/min; semi-finish reaming and honing, wherein the main shaft rotating speed is 500 +/-10 r/min, and the feeding speed is 60 +/-5 mm/min.
2. The method for processing the high-precision blind hole according to claim 1, wherein the rough reaming and honing is specifically: measuring the aperture after boring, then determining the excircle diameter of the rough reaming and honing cutter whetstone according to the rough reaming and honing allowance, wherein the excircle diameter of the rough reaming and honing cutter whetstone is the sum of the aperture after boring and the rough reaming and honing allowance, clamping the rough reaming and honing cutter, and starting a processing procedure to perform rough reaming and honing.
3. The processing method of the high-precision blind hole as claimed in claim 1 or 2, wherein the semi-finish reaming and honing is specifically: measuring the aperture after rough reaming and honing, then determining the excircle diameter of the semi-finish reaming and honing tool oilstone according to the semi-finish reaming and honing allowance, wherein the excircle diameter of the semi-finish reaming and honing tool oilstone is the sum of the aperture after rough reaming and honing and the semi-finish reaming and honing allowance, clamping the semi-finish reaming and honing tool, and starting a machining procedure to semi-finish reaming and honing.
4. The processing method of the high-precision blind hole according to the claim 1 or 2, wherein the fine reaming and honing is specifically: measuring the aperture after the semi-finish reaming and honing, then determining the excircle diameter of the finish reaming and honing tool whetstone according to the finish reaming and honing allowance, wherein the excircle diameter of the finish reaming and honing tool whetstone is the sum of the aperture after the semi-finish reaming and honing allowance, clamping the finish reaming and honing tool, and starting a processing procedure to finish reaming and honing.
5. The high-precision blind hole machining method according to claim 1 or 2, characterized in that: the drilling, boring, rough reaming and honing, semi-fine reaming and honing and fine reaming and honing are finished in the same machining center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210796859.2A CN115041929A (en) | 2022-07-08 | 2022-07-08 | High-precision blind hole machining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210796859.2A CN115041929A (en) | 2022-07-08 | 2022-07-08 | High-precision blind hole machining method |
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| Publication Number | Publication Date |
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| CN115041929A true CN115041929A (en) | 2022-09-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210796859.2A Pending CN115041929A (en) | 2022-07-08 | 2022-07-08 | High-precision blind hole machining method |
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| CN107775520A (en) * | 2017-10-26 | 2018-03-09 | 承德苏垦银河连杆有限公司 | A kind of processing method of connecting rod macropore platform reticulate pattern |
| CN110091127A (en) * | 2019-04-25 | 2019-08-06 | 上海航天精密机械研究所 | A kind of thin-wall long and thin pipe fitting entirety precision machining method |
| CN210099711U (en) * | 2019-07-03 | 2020-02-21 | 安徽多邦珩磨技术有限公司 | Blind hole honing reamer |
| JP6689940B2 (en) * | 2018-10-26 | 2020-04-28 | 三菱日立パワーシステムズ株式会社 | Blind hole drilling method and blind hole drilling system |
| CN113352054A (en) * | 2021-06-03 | 2021-09-07 | 无锡威孚马山油泵油嘴有限公司 | P-type pump plunger sleeve reaming and honing process |
-
2022
- 2022-07-08 CN CN202210796859.2A patent/CN115041929A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107775520A (en) * | 2017-10-26 | 2018-03-09 | 承德苏垦银河连杆有限公司 | A kind of processing method of connecting rod macropore platform reticulate pattern |
| JP6689940B2 (en) * | 2018-10-26 | 2020-04-28 | 三菱日立パワーシステムズ株式会社 | Blind hole drilling method and blind hole drilling system |
| CN110091127A (en) * | 2019-04-25 | 2019-08-06 | 上海航天精密机械研究所 | A kind of thin-wall long and thin pipe fitting entirety precision machining method |
| CN210099711U (en) * | 2019-07-03 | 2020-02-21 | 安徽多邦珩磨技术有限公司 | Blind hole honing reamer |
| CN113352054A (en) * | 2021-06-03 | 2021-09-07 | 无锡威孚马山油泵油嘴有限公司 | P-type pump plunger sleeve reaming and honing process |
Non-Patent Citations (1)
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