CN115055910B - High-precision valve core hole precision machining method suitable for cast valve body - Google Patents
High-precision valve core hole precision machining method suitable for cast valve body Download PDFInfo
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- CN115055910B CN115055910B CN202210816051.6A CN202210816051A CN115055910B CN 115055910 B CN115055910 B CN 115055910B CN 202210816051 A CN202210816051 A CN 202210816051A CN 115055910 B CN115055910 B CN 115055910B
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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
- B23P13/00—Making metal objects by operations essentially involving machining but not covered by a single other subclass
- B23P13/02—Making metal objects by operations essentially involving machining but not covered by a single other subclass in which only the machining operations are important
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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
- B23P15/001—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Milling, Broaching, Filing, Reaming, And Others (AREA)
Abstract
The invention discloses a high-precision valve core hole precision machining method suitable for a cast valve body. The method comprises the following processing steps: step one: aiming at a cast valve body with a phi (D-6) pre-cast hole, a double-blade anti-vibration reaming boring cutter I is adopted to counter-ream the phi (D-6) pre-cast hole to phi (D-1.5); step two: adopting a double-blade anti-vibration reaming boring cutter II to ream a phi (D-1.5) valve core Kong Duitou to phi (D-0.5), and reaming a hole counter bore phi E; step three: finish reaming one end of a phi (D-0.5) valve core hole to phi (D-0.15) by adopting a finish reaming guide cutter, wherein the machining depth is 2 valve core hole steps; step four: and (3) taking the phi (D-0.15)) valve core hole as a guide hole, and reaming the phi (D-0.15) valve core hole to phi (D-0.045) by adopting a guide bar adjustable double-blade reamer. The invention reasonably distributes machining allowance, has high cutter machining stability, improves the service life of the cutter, can realize high cutting speed and can reach IT5 machining precision, and is particularly suitable for machining cross holes and broken holes.
Description
Technical Field
The invention relates to the technical field of valve body machining, in particular to a high-precision valve core hole precision machining method suitable for a cast valve body.
Background
The hydraulic valve is a control element of a main machine of the engineering machinery, and one of main parts is a valve body. Especially, the machining quality of the valve body with the slide valve structure, the insertion hole and the valve core hole seriously influence the performance of the hydraulic valve, and the machining cost influences the competitiveness of products in the market.
The processing of a valve core hole (a hole with sealing requirement matched with a valve core) of a cast valve body is a key quality point in the manufacture of a hydraulic valve and is one of processing difficulties. The processing precision directly influences the performance, service life and use of the hydraulic valve, and also relates to the stability of the hydraulic system. The processing technology of the domestic cast valve body starts earlier, and the processing technology of the cast valve body mainly depends on independent research and development for reference.
The processing of the hydraulic valve core hole is a key characteristic point in the manufacture of the hydraulic multi-way valve and is one of processing difficulties. The machining precision of the valve core hole mainly comprises diameter size precision, roundness, cylindricity, surface roughness and the like. Generally, the diameter and the size precision of a valve core hole are required to be 0-0.02 mm, the roundness is within 0.01, the cylindricity is within 0.015, and the surface roughness of the valve core hole is within Ra1.6.
The China patent discloses a high-precision valve hole machining method (CN 111266799A) for a valve body, which is used for solving the problem that the valve hole machining precision of the valve body on a gearbox is not high enough in the prior art. The method comprises the following steps: step one: forming six surfaces of a valve body blank and an oil duct; step two: reaming: correcting a probe, setting coordinates which are 9 points, programming, reaming a valve body blank on a four-axis vertical machining center machine tool, and enabling the surface quality of a valve hole to reach Ra0.8 after reaming; step three: precise reaming of the discontinuous surface high-precision valve hole: and (3) checking and adjusting each tool face of the tool by using a precise reamer, wherein the radial runout of the tool faces is not more than 0.0012, programming for boring, the surface quality of the valve hole after boring reaches Ra0.4, the aperture size precision is 6, and the cylindricity of the valve hole reaches 0.003-0.005.
The defects of the prior art are as follows:
1. the valve hole machining method uses a precise reamer, and during machining, each cutter surface of the cutter needs to be checked and adjusted, the radial runout of the cutter surface is not more than 0.0012, and the cutter is complex to adjust and is not easy to operate;
2. the stability of the cutter machining precision is not high, and the market popularization is not facilitated.
Disclosure of Invention
In order to solve the technical problems, the invention provides a high-precision valve core hole precision machining method suitable for casting a valve body.
The invention is realized by the following technical scheme: a high-precision valve core hole precision machining method suitable for a cast valve body comprises the following machining steps:
step one: aiming at a cast valve body with a phi (D-6) pre-cast hole, adopting a double-blade anti-vibration reaming boring cutter I to counter-ream the phi (D-6) pre-cast hole to phi (D-1.5);
step two: adopting a double-blade anti-vibration reaming boring cutter II to ream the phi (D-1.5) valve core Kong Duitou to phi (D-0.5), and reaming a hole counter bore phi E;
step three: finish reaming one end of the phi (D-0.5) valve core hole to phi (D-0.15) by adopting a finish reaming guide cutter, wherein the machining depth is 2 valve core hole steps;
step four: taking the phi (D-0.15)) valve core holes with the step depths of 2 valve core holes in the third step as guide holes, and reaming the phi (D-0.15) valve core holes to phi (D-0.045) by adopting a guide bar adjustable double-blade reamer;
the blades in the guide bar adjustable double-blade reamer are higher than the guide bar in the axial direction of the cutter, and the blades are higher than the guide bar in the radial direction of the cutter; the rear end of the blade in the guide bar adjustable double-blade reamer is lower than the cutter point.
Preferably: the front end of the cutter of the double-blade anti-vibration reaming boring cutter I is provided with two groups of blades which are arranged front and back; and the front and rear groups of blades distribute the whole machining allowance in the first step.
Preferably: the front end of the cutter of the double-blade anti-vibration reaming boring cutter II is provided with a front group of blades, and the rear end of the cutter is provided with a rear group of blades; the front group of blades are used for reducing the finish reaming allowance and correcting the straightness of the valve core hole; the rear group of blades are used for countersinking the hole opening counter bore phi E.
Preferably: each set of blades comprises 2 blades symmetrically arranged in the radial direction of the tool.
Preferably: the blade in the guide bar adjustable double-blade reamer adopts an indexable blade.
Preferably: the amount that the blade in the adjustable double-edge reamer of the guide bar is higher than the guide bar in the axial direction of the cutter is 0.25mm, and when the cutter cuts into a workpiece for 2-3 turns, the guide bar can be supported on the machined hole wall.
Preferably: the amount of the blade in the guide bar adjustable double-blade reamer higher than the guide bar in the radial direction of the cutter is adjustable; when cast iron is processed, the blade is raised from the guide bar by an amount of 0.01 to 0.015mm in the radial direction of the tool.
Preferably: the handle of the guide bar adjustable double-blade reamer is mounted on the HSK cutter handle through a KS adjusting flange.
Compared with the prior art, the invention has the beneficial effects that:
(1) The machining allowance is reasonably distributed, the machining stability of the cutter is high, the service life of the cutter is prolonged, the high cutting speed can be realized, the machining precision can reach IT5, and the cutter is particularly suitable for machining cross holes and broken holes;
(2) The cutting and reaming of the valve body are guided in the holes by using indexable blades and being positioned at the optimal geometric position of the guide bar; when the cutter cuts into the workpiece for 2-3 turns, the guide bar can be supported to the machined hole wall; the rear end of the blade is lower than the quantity (BT) of the blade tip, so that the blade tip is guaranteed to be at the highest point, and all sides of the blade are not guaranteed to participate in cutting, and the side edges of the blade play roles in polishing and extrusion;
(3) The handle of the reamer with the adjustable guide bars and double cutting edges adopts a main handle, KS adjusting flanges and an HSK integral cutter, the jump of the front end and the rear end of the cutter can be adjusted to be within 0.003mm, the repetition precision of an HSK interface is within 0.003mm, and the quality and the machining precision of a hole machining surface are further improved.
Drawings
FIG. 1 is a schematic view of a double-bladed anti-vibration reamer I;
FIG. 2 is a schematic structural view of a double-blade anti-vibration reaming boring cutter II;
FIG. 3 is a schematic view of the structure of a finish reaming guide cutter;
FIG. 4 is a schematic diagram of a bar adjustable double-bladed reamer;
fig. 5 is a partial enlarged view of fig. 4.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
A high-precision valve core hole precision machining method suitable for a cast valve body aims at a cast valve body with a phi (D-6) pre-cast hole, and a phi D valve core hole is machined, and the method comprises the following machining steps:
step one: as shown in fig. 1, a phi (D-1.5) double-blade anti-vibration reaming boring cutter I is adopted to counter-ream a phi (D-6) pre-cast hole to phi (D-1.5);
the front end of the cutter of the double-blade anti-vibration reaming boring cutter I is provided with two groups of blades which are arranged front and back, each group of blades comprises 2 blades which are symmetrically arranged in the radial direction of the cutter, and the front and back groups of blades distribute the whole machining allowance in the first step, so that the service life of the cutter is prolonged.
Step two: as shown in fig. 2, a phi (D-0.5) double-edge anti-vibration reaming boring cutter II is adopted to ream a phi (D-1.5) valve core Kong Duitou to phi (D-0.5), and a hole counter bore phi E is reamed;
the front end of the cutter of the double-blade anti-vibration reaming boring cutter II is provided with a front group of blades, the rear end of the cutter is provided with a rear group of blades, and each group of blades comprises 2 blades symmetrically arranged in the radial direction of the cutter. The front group of blades are used for reducing the finish reaming allowance and correcting the straightness of the phi 28 valve core hole, so that the cylindricity of the valve core hole is improved. The rear group of blades are used for countersinking the hole opening phi E.
Step three: as shown in FIG. 3, a finish reaming guide cutter is adopted for phi (D-0.15), one end of a phi (D-0.5) valve core hole is finish-reamed to phi (D-0.15), and 2 valve core hole steps with processing depth are processed and used as phi (D-0.045) guide bar adjustable double-blade reamer guide holes.
Step four: as shown in fig. 4, taking phi (D-0.15)) valve core holes with the step depths of 2 valve core holes in the third step as guide holes, and reaming the phi (D-0.15) valve core holes to phi (D-0.045) by adopting a phi (D-0.045) guide bar adjustable double-blade reamer; wherein the cutting and reaming of the valve body in the bore is accomplished with a positional fit of the indexable insert and the guide bar.
The amount by which the blade is axially higher than the guide bar is not adjustable, in this embodiment set to 0.25mm, ensuring that the guide bar will support the machined hole wall when the cutter is cutting into the workpiece 2-3 revolutions. The amount by which the blade is raised in the radial direction of the tool than the guide bar can be adjusted, and the embodiment is set to 0.01-0.015mm when cast iron is processed. The blade is not installed on the cutter in a way of being completely parallel to the axis of the cutter, the rear end of the blade is lower than the cutter point (BT), the cutter point is guaranteed to be at the highest point, all sides of the blade are also guaranteed to participate in cutting, the sides of the cutter play roles in polishing and extrusion, and the BT can improve the quality and the machining precision of a hole machining surface.
The handle of the guide bar adjustable double-blade reamer is arranged on the HSK cutter handle through the KS adjusting flange, the guide bar adjustable double-blade reamer adopts a main handle, the KS adjusting flange and the HSK integral cutter, the front end and the rear end of the cutter can be adjusted to be within 0.003mm, and the repetition precision of an HSK interface is within 0.003 mm.
The valve core hole precision machining method has the advantages that the cutter machining stability is high, the high cutting speed can be realized, the machining precision can reach IT5, and the method is particularly suitable for cross hole and broken hole machining.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (6)
1. The high-precision valve core hole precision machining method suitable for the cast valve body is characterized by comprising the following machining steps of:
step one: aiming at a cast valve body with a phi (D-6) pre-cast hole, adopting a double-blade anti-vibration reaming boring cutter I to counter-ream the phi (D-6) pre-cast hole to phi (D-1.5);
step two: adopting a double-blade anti-vibration reaming boring cutter II to ream the phi (D-1.5) valve core Kong Duitou to phi (D-0.5), and reaming a hole counter bore phi E; the front end of the cutter of the double-blade anti-vibration reaming boring cutter II is provided with a front group of blades, and the rear end of the cutter is provided with a rear group of blades; the front group of blades are used for reducing the finish reaming allowance and correcting the straightness of the valve core hole; the rear group of blades are used for countersinking a hole opening counter bore phi E;
step three: finish reaming one end of the phi (D-0.5) valve core hole to phi (D-0.15) by adopting a finish reaming guide cutter, wherein the machining depth is 2 valve core hole steps;
step four: taking the phi (D-0.15) valve core holes with the step depths of 2 valve core holes in the third step as guide holes, and reaming the phi (D-0.15) valve core holes to phi (D-0.045) by adopting a guide bar adjustable double-blade reamer;
the blades in the guide bar adjustable double-blade reamer are higher than the guide bar in the axial direction of the cutter, and the blades are higher than the guide bar in the radial direction of the cutter; the rear end of the blade in the guide bar adjustable double-blade reamer is lower than the cutter point.
2. The precise machining method for the high-precision valve core hole, which is applicable to casting a valve body, according to claim 1, is characterized in that: the front end of the cutter of the double-blade anti-vibration reaming boring cutter I is provided with two groups of blades which are arranged front and back; and the front and rear groups of blades distribute the whole machining allowance in the first step.
3. The precise machining method for the high-precision valve core hole, which is applicable to casting a valve body, according to claim 1, is characterized in that: the blade in the guide bar adjustable double-blade reamer adopts an indexable blade.
4. The precise machining method for the high-precision valve core hole, which is applicable to casting a valve body, according to claim 1, is characterized in that: the amount that the blade in the adjustable double-edge reamer of the guide bar is higher than the guide bar in the axial direction of the cutter is 0.25mm, and when the cutter cuts into a workpiece for 2-3 turns, the guide bar can be supported on the machined hole wall.
5. The precise machining method for the high-precision valve core hole, which is applicable to casting a valve body, according to claim 4, is characterized in that: the amount of the blade in the guide bar adjustable double-blade reamer higher than the guide bar in the radial direction of the cutter is adjustable; when cast iron is processed, the blade is raised from the guide bar by an amount of 0.01 to 0.015mm in the radial direction of the tool.
6. The precise machining method for the high-precision valve core hole, which is applicable to casting a valve body, according to claim 1, is characterized in that: the handle of the guide bar adjustable double-blade reamer is mounted on the HSK cutter handle through a KS adjusting flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210816051.6A CN115055910B (en) | 2022-07-12 | 2022-07-12 | High-precision valve core hole precision machining method suitable for cast valve body |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210816051.6A CN115055910B (en) | 2022-07-12 | 2022-07-12 | High-precision valve core hole precision machining method suitable for cast valve body |
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| CN115055910A CN115055910A (en) | 2022-09-16 |
| CN115055910B true CN115055910B (en) | 2023-08-29 |
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| CN202210816051.6A Active CN115055910B (en) | 2022-07-12 | 2022-07-12 | High-precision valve core hole precision machining method suitable for cast valve body |
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Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201728380U (en) * | 2010-06-28 | 2011-02-02 | 东莞鸿图精密压铸有限公司 | Special cutter for processing engine pump valve ports |
| CN102310316A (en) * | 2011-08-10 | 2012-01-11 | 龙工（上海）桥箱有限公司 | Method for completing high-precision machining of valve body hole series on machine tool of machining center. |
| CN103495848A (en) * | 2013-10-10 | 2014-01-08 | 昆山纯柏精密五金有限公司 | Method for machining inner holes of cutter |
| CN204770738U (en) * | 2015-07-20 | 2015-11-18 | 安徽江淮汽车股份有限公司 | A cutter that is used for rough machining of jar hole and chamfer |
| CN105345406A (en) * | 2015-11-28 | 2016-02-24 | 贵州凯星液力传动机械有限公司 | Efficient machining method of precise valve hole |
| CN106216718A (en) * | 2016-08-18 | 2016-12-14 | 西安现代深孔技术有限公司 | A kind of deep borehole double body combination pushes away boring cutter body device |
| CN207709958U (en) * | 2017-12-28 | 2018-08-10 | 深圳市圆梦精密技术研究院 | Bore milling ream integrated cutter |
| CN209736659U (en) * | 2019-04-22 | 2019-12-06 | 无锡方寸工具有限公司 | Guide strip knife |
| CN111002003A (en) * | 2019-12-24 | 2020-04-14 | 常州利德切削技术有限公司 | Efficient and long-service-life hydraulic valve main hole machining method |
| CN111570915A (en) * | 2020-04-21 | 2020-08-25 | 湖北三环锻造有限公司 | Reamer special for steering knuckle and machining method of steering knuckle |
| CN213827078U (en) * | 2020-11-17 | 2021-07-30 | 富曜半导体(昆山)有限公司 | Bidirectional inner hole boring cutter for machining ultra-precise parts |
| CN113334037A (en) * | 2021-06-07 | 2021-09-03 | 江苏展志金属科技有限公司 | Machining process of movable template in metal mold frame |
| CN113770399A (en) * | 2021-08-20 | 2021-12-10 | 中国航发航空科技股份有限公司 | Tool for machining deep hole of intermediate case of aircraft engine and machining method of tool |
| CN215545474U (en) * | 2021-09-30 | 2022-01-18 | 徐州阿马凯液压技术有限公司 | Novel composite guide reamer suitable for machining valve core hole |
-
2022
- 2022-07-12 CN CN202210816051.6A patent/CN115055910B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201728380U (en) * | 2010-06-28 | 2011-02-02 | 东莞鸿图精密压铸有限公司 | Special cutter for processing engine pump valve ports |
| CN102310316A (en) * | 2011-08-10 | 2012-01-11 | 龙工（上海）桥箱有限公司 | Method for completing high-precision machining of valve body hole series on machine tool of machining center. |
| CN103495848A (en) * | 2013-10-10 | 2014-01-08 | 昆山纯柏精密五金有限公司 | Method for machining inner holes of cutter |
| CN204770738U (en) * | 2015-07-20 | 2015-11-18 | 安徽江淮汽车股份有限公司 | A cutter that is used for rough machining of jar hole and chamfer |
| CN105345406A (en) * | 2015-11-28 | 2016-02-24 | 贵州凯星液力传动机械有限公司 | Efficient machining method of precise valve hole |
| CN106216718A (en) * | 2016-08-18 | 2016-12-14 | 西安现代深孔技术有限公司 | A kind of deep borehole double body combination pushes away boring cutter body device |
| CN207709958U (en) * | 2017-12-28 | 2018-08-10 | 深圳市圆梦精密技术研究院 | Bore milling ream integrated cutter |
| CN209736659U (en) * | 2019-04-22 | 2019-12-06 | 无锡方寸工具有限公司 | Guide strip knife |
| CN111002003A (en) * | 2019-12-24 | 2020-04-14 | 常州利德切削技术有限公司 | Efficient and long-service-life hydraulic valve main hole machining method |
| CN111570915A (en) * | 2020-04-21 | 2020-08-25 | 湖北三环锻造有限公司 | Reamer special for steering knuckle and machining method of steering knuckle |
| CN213827078U (en) * | 2020-11-17 | 2021-07-30 | 富曜半导体(昆山)有限公司 | Bidirectional inner hole boring cutter for machining ultra-precise parts |
| CN113334037A (en) * | 2021-06-07 | 2021-09-03 | 江苏展志金属科技有限公司 | Machining process of movable template in metal mold frame |
| CN113770399A (en) * | 2021-08-20 | 2021-12-10 | 中国航发航空科技股份有限公司 | Tool for machining deep hole of intermediate case of aircraft engine and machining method of tool |
| CN215545474U (en) * | 2021-09-30 | 2022-01-18 | 徐州阿马凯液压技术有限公司 | Novel composite guide reamer suitable for machining valve core hole |
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| CN115055910A (en) | 2022-09-16 |
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