CN104608042A - Forced turbulent flow hole surface finish machining technology - Google Patents

Forced turbulent flow hole surface finish machining technology Download PDF

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Publication number
CN104608042A
CN104608042A CN201510035177.XA CN201510035177A CN104608042A CN 104608042 A CN104608042 A CN 104608042A CN 201510035177 A CN201510035177 A CN 201510035177A CN 104608042 A CN104608042 A CN 104608042A
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CN
China
Prior art keywords
hole
workpiece
liquid
finishing
impeller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510035177.XA
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Chinese (zh)
Inventor
李文辉
李秀红
李彦馨
杨胜强
侯志燕
白小云
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Taiyuan University of Technology
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Taiyuan University of Technology
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Publication date
Application filed by Taiyuan University of Technology filed Critical Taiyuan University of Technology
Priority to CN201510035177.XA priority Critical patent/CN104608042A/en
Publication of CN104608042A publication Critical patent/CN104608042A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/10Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work

Abstract

The invention provides a forced turbulent flow hole surface finish machining device and method, and belongs to the technical field of mechanical part surface finish machining. A forced turbulent flow hole surface finish machining technology is characterized in that by means of the principle that metal is scoured, corroded and abraded in liquid-particle two-phase flow, a finishing part is placed in a workpiece hole cavity containing abrasive particles and liquid, liquid-particle two-phase fluid in the hole cavity is mixed through high-speed rotation of the finishing part, and forced turbulent flow is formed, so that the abrasive material particles are evenly scattered in the fluid, the abrasive material particles are attached to the surfaces of workpiece holes along with liquid and move at high speed, the hole surfaces are rubbed and ground in a sliding mode, and the whole hole surface finish machining technology is achieved due to the fact that the finishing part is fed in the axial direction. The technology is easy to achieve, low in cost and high in reliability, the turbulent degree of forced turbulent flow of the liquid-particle two-phase flow in the hole cavity and action force of the abrasive material particles on the hole surfaces are controlled by externally controlling the amplitude of the rotation speed of a motor, and accordingly stable machining is achieved, and uniformity of machined surface quality is guaranteed.

Description

A kind of forced turbulent hole surface finishing process
Technical field
A kind of forced turbulent hole surface of the present invention finishing process, belongs to surface finishing of part processing technique field, is specifically related to the free grinding tool Finishing in oversized hole surface, mainly for the skin processing of the hole surface such as cylinder jacket, hydraulic cylinder.
Background technology
Hole surface quality has very important effect for the serviceability of some engineering goods, fatigue life, and some blemish cause that machine run is abnormal, the immediate cause of premature failure.Hole surface Finishing now mainly contains: abrasive flows, barreling, dilute gas-particle flow, magnetic grinding etc., often kind of processing method can both realize the skin processing in hole to a certain extent, there is its advantage, but inevitably have some shortcomings being difficult to overcome.For dilute gas-particle flow finishing process, its cardinal principle utilizes gases at high pressure to adopt the mode of tangential influent stream to form screw, under this pressure screw, the abrasive grain putting into workpiece hole in advance also can be spinned motion, therefore grinding can be produced to surface of the work, delineation, the effect of roll extrusion, realize the skin processing on workpiece hole surface, but the defect of this technique is air-flow energy attenuation vertically, so that from the position away from air inlet, the energy of gas can not drive abrasive grain for the helical movement, causing hole surface vertically crudy is uneven, in addition be also difficult in practice ensure the stable of atmospheric pressure value.In surface finishing of part processing, hole surface skin processing is relatively difficult, particularly the hole surface such as large scale shoulder hole, profiled holes.Such as, in commercial Application, hydraulic cylinder adopts common honing, ultrasonic honing processing inner surface, common honing technique oilstone easily blocks, working (machining) efficiency is low, noise is large, and machined surface quality is poor, although ultrasonic honing overcomes some defects of common honing, but structure is relatively complicated, improves the surface integrity indexs such as surface stress limited.For this reason, how effectively to solve the skin processing problem of hole surface, for raising part quality, and even the equipment manufacturing level of China is significant.
Summary of the invention
A kind of forced turbulent hole surface of the present invention finishing process, object is the difficult problem for effectively solving the hole surface skin processing that above-mentioned prior art exists.There is provided a kind of process automatically can processing the more unmanageable hole surfaces such as straight hole, shoulder hole, profiled holes and blind hole, and by external control, real-time controlled working parameter, reaches automation and controlledization of processing.
A kind of hole surface finishing process of the present invention, it is characterized in that one utilizes metal in liquid grain two phase flow erosive-corrosive wear principle, polishing parts are placed in the Hole Passage of Workpiece containing abrasive particle and liquid, by the high speed revolution of polishing parts, the liquid grain two-phase fluid in vestibule is mixed, and form forced turbulent, abrasive grain is made to be dispersed in fluid, abrasive grain is followed liquid and is close to workpiece hole surface high-speed motion, swiping is realized to hole surface, grinding also axially does feed motion by polishing parts, realize the technique of the skin processing of whole hole surface, the finishing processing device that this technique adopts, comprise motor 1, shaft coupling 2, impeller axle 3, fluid tank 4, liquid 5, impeller 6, abrasive grain 7, supporting disk 8 and workpiece 9, described impeller 6 and supporting disk 8 are arranged on impeller axle 3, form polishing parts, along with impeller axle turns round jointly, described polishing parts are connected with motor 1 by shaft coupling 2, are placed in the hole of workpiece 9, described polishing parts axially do feed motion, described impeller 6 is Three-blade structures, described supporting disk diameter 0.1mm ~ 0.5mm less of workpiece aperture, main rising seals and supporting role, prevents small size abrasive grain from flowing in outside fluid tank, described workpiece 9 is placed in fluid tank 4, described fluid tank 4 effect is that in holding workpiece, fluid-mixing can not flow out, the particle size of described impeller 6 rotating speed, liquid 5 composition, abrasive grain 7, material category parameter changes according to different process requirements, and described range of motor speeds is 200r/min ~ 1700r/min, and rotational speed regulation is realized by frequency converter, the feed speed of described workpiece feed motion is determined according to motor speed, abrasive material speed in vestibule determine feed speed equally here n is motor speed (r/min), r is workpiece hole radius (m), R is abrasive grain radius (m), described impeller 6 effectively machining hole inside diameter ranges is: D=d+ (10mm ~ 40mm), wherein d is impeller diameter, the unit of d is mm, by changing the external diameter of impeller to adapt to the hole surface skin processing of different pore size.
The advantage of a kind of forced turbulent hole surface of the present invention finishing process is: this technique is simply easy to realize, with low cost, reliability is high, can realize the skin processing of hole surface, and the device of same size can adapt to the skin processing of certain diameter scope bore area.Beneficial effect of the present invention is: the present invention by the disorderly degree of the size control hole intraluminal fluid grain two phase flow forced turbulent of external control motor speed and abrasive grain to the active force of hole surface, thus realize stable processing, ensure that the uniformity of processing rear surface quality; This technique and auxiliary equipment structure is simple, floor space is little, control is convenient, easily realize automation.
Accompanying drawing illustrates:
Fig. 1 is principle schematic of the present invention.
Fig. 2 is effect contrast figure before and after work pieces process.
In figure: 1-motor, 2-shaft coupling, 3-impeller axle, 4-fluid tank, 5-liquid, 6-impeller, 7-abrasive grain, 8-supporting disk, 9-workpiece.
Detailed description of the invention:
Embodiment 1:
First workpiece 9 is put into the fluid tank 4 with liquid, the processed hole polishing parts after being connected with motor 1 being put into workpiece 9 is inner, then by abrasive grain 7 to put into the processed hole of workpiece 9 inner.Starter motor 1, motor 1 drives polishing parts to rotate by shaft coupling 2, after rotating speed reaches 200r/min, liquid grain two-phase fluid in disturbance vestibule forms forced turbulent, thus drive abrasive grain 7 to be close to workpiece hole apparent motion, and scratching, grinding are carried out to hole surface, realizes the skin processing of hole surface.For realizing, to the overall skin processing of hole surface, making polishing parts along doing axial feed motion in process.Its impeller 6 external diameter is Φ 108mm, and impeller axle 3 diameter is Φ 12mm, workpiece diameter 130mm, and abrasive grain 7 particle diameter is Φ 5mm, and using roughmeter to measure the hole surface roughness value before processing is Ra10.001 μm, its concrete steps:
1, first workpiece 9 is put into the fluid tank 4 with certain quantity of fluid.
2, the processed hole polishing parts after being connected with motor being put into workpiece 9 is inner.
3, the processed hole a certain amount of abrasive grain 7 being put into workpiece 9 is inner.
4, switch on power, by adjustment frequency converter, and the tachometer value of polishing parts is set as 600r/min by frequency converter.
5, polishing parts start rotate and process hole surface.
6, completion of processing, takes out polishing parts.
After process time 10min, using roughmeter to measure the hole surface roughness value after processing is Ra4.236 μm.
Embodiment 2:
First workpiece 9 is put into the fluid tank 4 with liquid, the processed hole polishing parts after being connected with motor 1 being put into workpiece 9 is inner, then by abrasive grain 7 to put into the processed hole of workpiece 9 inner.Starter motor 1, motor 1 drives polishing parts to rotate by shaft coupling 2, after rotating speed reaches 200r/min, liquid grain two-phase fluid in disturbance vestibule forms forced turbulent, thus drive abrasive grain 7 to be close to workpiece hole apparent motion, and scratching, grinding are carried out to hole surface, realizes the skin processing of hole surface.For realizing, to the overall skin processing of hole surface, making polishing parts along doing axial feed motion in process.Its impeller 6 external diameter is Φ 108mm, and impeller axle 3 diameter is Φ 12mm, workpiece diameter 130mm, and abrasive grain 7 particle diameter is Φ 5mm, and using roughmeter to measure the hole surface roughness value before processing is Ra10.001 μm, its concrete steps:
1, first workpiece 9 is put into the fluid tank 4 with certain quantity of fluid.
2, the processed hole polishing parts after being connected with motor being put into workpiece 9 is inner.
3, the processed hole a certain amount of abrasive grain 7 being put into workpiece 9 is inner.
4, switch on power, by adjustment frequency converter, and the tachometer value of polishing parts is set as 1200r/min by frequency converter.
5, polishing parts start rotate and process hole surface.
6, completion of processing, takes out polishing parts.
After process time 10min, using roughmeter to measure the hole surface roughness value after processing is Ra1.742 μm.
Embodiment 3:
First workpiece 9 is put into the fluid tank 4 with liquid, the processed hole polishing parts after being connected with motor 1 being put into workpiece 9 is inner, then by abrasive grain 7 to put into the processed hole of workpiece 9 inner.Starter motor 1, motor 1 drives polishing parts to rotate by shaft coupling 2, after rotating speed reaches 200r/min, liquid grain two-phase fluid in disturbance vestibule forms forced turbulent, thus drive abrasive grain 7 to be close to workpiece hole apparent motion, and scratching, grinding are carried out to hole surface, realizes the skin processing of hole surface.For realizing, to the overall skin processing of hole surface, making polishing parts along doing axial feed motion in process.Its support impeller 6 external diameter is Φ 108mm, workpiece diameter 130mm, and abrasive grain 7 particle diameter is Φ 2mm, and using roughmeter to measure the hole surface roughness value before processing is Ra10.001 μm, its concrete steps:
1, first workpiece 9 is put into the fluid tank 4 with certain quantity of fluid.
2, the processed hole polishing parts after being connected with motor being put into workpiece 9 is inner.
3, the processed hole a certain amount of abrasive grain 7 being put into workpiece 9 is inner.
4, switch on power, by adjustment frequency converter, and the tachometer value of polishing parts is set as 1500r/min by frequency converter.
5, polishing parts start rotate and process hole surface.
6, completion of processing, takes out polishing parts.
After processing 5min, using roughmeter to measure the hole surface roughness value after processing is Ra0.671 μm.

Claims (6)

1. a forced turbulent hole surface finishing process, it is characterized in that one utilizes metal in liquid grain two phase flow erosive-corrosive wear principle, polishing parts are placed in the Hole Passage of Workpiece containing abrasive grain and liquid, by the high speed revolution of polishing parts, the liquid grain two-phase fluid in vestibule is mixed, and form forced turbulent, abrasive grain is made to be dispersed in fluid, abrasive grain is followed liquid and is close to workpiece hole surface high-speed motion, to hole surface swiping, grinding is also by the axial feed motion of polishing parts, realize the technique of the skin processing of whole hole surface, the finishing processing device that this technique adopts comprises motor (1), shaft coupling (2), impeller axle (3), fluid tank (4), liquid (5), impeller (6), abrasive grain (7), supporting disk (8) and workpiece (9), impeller (6) and supporting disk (8) are arranged on impeller axle (3), form polishing parts, along with impeller axle (3) turns round jointly, described polishing parts are connected with motor (1) by shaft coupling (2), are placed in the hole of workpiece (9), workpiece (9) is placed in fluid tank (4), and effect is that in holding workpiece, fluid-mixing can not flow out.
2. a kind of hole surface finishing process according to claim 1, is characterized in that: impeller (6) is Three-blade structure.
3. a kind of hole surface finishing process according to claim 1, it is characterized in that: supporting disk (8) diameter 0.1mm ~ 0.5mm less of workpiece aperture, main rising seals and supporting role, prevents small size abrasive grain from flowing in outside fluid tank.
4. a kind of hole surface finishing process according to claim 1, is characterized in that: the principle utilizing metal erosive-corrosive wear in liquid grain two phase flow, realizes abrasive grain skin processing to hole surface under forced turbulent.
5. a kind of hole surface finishing process according to claim 1, it is characterized in that: motor rotational shaft speed scope is 200r/min ~ 1700r/min, rotational speed regulation is realized by frequency converter, and feed speed then will be determined according to motor speed, abrasive grain speed in vestibule determine feed speed equally here n is motor speed (r/min), r is workpiece hole radius (m), and R is abrasive grain radius (m).
6. a kind of hole surface finishing process according to claim 1, it is characterized in that: impeller (6) effectively machining hole inside diameter ranges is: D=d+ (10mm ~ 40mm), wherein d is impeller diameter, the unit of d is mm, by changing the external diameter of impeller to adapt to the hole surface skin processing of different pore size.
CN201510035177.XA 2015-01-23 2015-01-23 Forced turbulent flow hole surface finish machining technology Pending CN104608042A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105108631A (en) * 2015-09-22 2015-12-02 浙江工业大学 Variable-camber section inner cylindrical surface airflow assisting abrasive flow polishing device
CN105643473A (en) * 2015-12-28 2016-06-08 广州大学 Grinding device for peripheral surfaces of cylindrical workpieces
CN106180909A (en) * 2016-08-26 2016-12-07 廊坊市北方天宇机电技术有限公司 A kind of synchronizer gear sleeve class part spiral-flow type centrifugal barrel finishing fitting device and method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105108631A (en) * 2015-09-22 2015-12-02 浙江工业大学 Variable-camber section inner cylindrical surface airflow assisting abrasive flow polishing device
CN105643473A (en) * 2015-12-28 2016-06-08 广州大学 Grinding device for peripheral surfaces of cylindrical workpieces
CN105643473B (en) * 2015-12-28 2017-12-26 广州大学 A kind of lapping device of cylindrical work outer peripheral face
CN106180909A (en) * 2016-08-26 2016-12-07 廊坊市北方天宇机电技术有限公司 A kind of synchronizer gear sleeve class part spiral-flow type centrifugal barrel finishing fitting device and method
CN106180909B (en) * 2016-08-26 2018-03-16 廊坊市北方天宇机电技术有限公司 A kind of synchronizer gear sleeve class part spiral-flow type centrifugal barrel finishing fitting device and method

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Application publication date: 20150513