CN101733707A - Intensified abrasive machining method for mechanical surface - Google Patents
Intensified abrasive machining method for mechanical surface Download PDFInfo
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- CN101733707A CN101733707A CN201010101390A CN201010101390A CN101733707A CN 101733707 A CN101733707 A CN 101733707A CN 201010101390 A CN201010101390 A CN 201010101390A CN 201010101390 A CN201010101390 A CN 201010101390A CN 101733707 A CN101733707 A CN 101733707A
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Abstract
The invention discloses an intensified abrasive machining method for a mechanical surface. The method comprises the following steps of: (1) providing a metal workpiece and clamping the metal workpiece on a fixture of a turnplate of a spindle driving device of intensified abrasive machining equipment; (2) providing intensified abrasive and loading the intensified abrasive to a high pressure injection device of the intensified abrasive machining equipment; and (3) injecting the intensified abrasive onto the surface of the rotating metal workpiece through the high pressure injection device of the intensified abrasive machining equipment to perform intensified abrasive machining. When the method is used to process mechanical parts, the method enhances the surface hardness of a metal machined part, effectively improves the surface quality and prolongs the fatigue life.
Description
Technical field
The invention belongs to the mechanical surface processing technique field, be specifically related to a kind of method of metal works surface peening attrition process.
Background technology
The develop rapidly of modern industrialization, automaticity, the mechanical surface quality is had higher requirement, the quality quality on surface not only has influence on the outward appearance of product, but also be directly connected to the life-span and the reliability of product even whole plant equipment, as in Aeronautics and Astronautics equipment and national defence, military equipment, the inefficacy of certain key components and parts just may cause entire equipment not move, even causes serious accident and disaster.Therefore, mechanical surface is strengthened the necessary means that attrition process has become some key components and parts Surface Machining in engineering machinery, accurate apparatus, Medical Devices, particularly Aeronautics and Astronautics equipment and national defence, the military equipment industry.
Component of machine generally need just can be produced through cutting (comprising turning, milling, grinding etc.) processing, yet, in cutting process, unavoidably to produce metamorphic layer owing to heat in metal cutting at machining surface, machining surface layer hardness is descended, and be the tension layer, easily produce fatigue crack, thereby reduce the fatigue life and the reliability of the particularly crucial sliding part of component of machine (comprising bearing, leading screw, guide rail etc.); In general hard cutting, machining surface residual tension also can occur and be difficult to ACTIVE CONTROL; In adopting the strong cold machining of liquid nitrogen as cooling medium, its effect is still not ideal enough, and processing cost is also higher; And in adopting the hard cutting process processing of prestressing force, though this processing method can make machining surface produce residual compressive stress, but thisly apply the method that prestressing force carries out machining based on component of machine, have following several problem to be difficult to solve: the workpiece of (1) special shape and size is difficult to carry out the prestressing force machining; (2) prestressed applying making machined piece produce bigger elastic-plastic deformation is difficult to improve machining accuracy and surface quality.
In order to improve the residual tension that machining produces, the fatigue life of improving component of machine, at present widely used is surface strengthening technology, mainly comprises: surface coating, surface modification and surperficial mechanical enhancer.Preceding two kinds of methods can obviously improve mechanical surface contact fatigue life and corrosion resistance, but exist coating and basal body binding force poor, and technology is still immature, deficiencies such as cost costliness; The surface mechanical enhancer mainly comprises roll extrusion and shot peening strengthening, roll extrusion can produce residual compressive stress at the surface of the work layer, but this method easily makes superficial layer produce flow harden and becomes fragile, reduce fatigue life on the contrary, shot peening strengthening also can make the top layer produce flow harden and residual compressive stress, makes surface roughness strengthen and cross the problem of flow harden but also exist.And particularly the fatigue crack of accurate sliding part is mostly from the surface for component of machine, and residual tension and surface roughness are low to be the main cause of its crack growth.Therefore, when in such as industry such as accurate apparatus, Medical Devices, surface roughness being had higher requirements again, component of machine after the surface peening also needs to increase important surface grinding operation one, or even need experienced engineering master worker to carry out hand-ground, not only working ability is poor, efficient is low, and labour intensity is big.
Summary of the invention
The objective of the invention is easily to produce the harmful surperficial residual tension and the deficiency of existing machinery Surface-micromachining process at above-mentioned machining, the new machining method that provides a kind of employing to integrate reinforcement, grind, produce and have residual compressive stress, the method that has the mechanical surface of preferable roughness simultaneously is with the fatigue life of prolonged mechanical parts.
Operation principle of the present invention is: utilize the high-pressure injection device of strengthening attrition process equipment to be ejected on the metal works surface that is synchronized with the movement with main shaft driving device strengthening abrasive, to the metal works surface carry out at random, equiprobable bump, make metal works superficial layer generation elastic-plastic deformation on the one hand, cause that the refinement of strengthening layer subgrain, dislocation density increase, crystal boundary, sub boundary are progressively smudgy, disappearance, produce favourable residual compressive stress, thereby reach reinforcement, improve the effect of its case hardness, intensity the metal works surface; The relative motion of strengthening abrasive and metal works on the one hand makes it produce micro-cutting on surface of the work, continuous increase along with this effect number of times of strengthening abrasive, the micro-cutting of surface of the work just is tending towards evenly having reached the effect of its surface grinding, has obtained preferable surface roughness.
The technical solution used in the present invention is: a kind of mechanical surface is strengthened the method for attrition process, comprises that step is:
(1) provide metal works, and clamping is to the anchor clamps of the main shaft driving device rotating disk of strengthening attrition process equipment;
(2) provide the reinforcement abrasive, and pack into and strengthen the high-pressure injection device of attrition process equipment;
(3) utilize the high-pressure injection device of strengthening attrition process equipment that attrition process is strengthened on the metal works surface that the reinforcement abrasive is ejected into rotation.
Described reinforcement attrition process equipment has a high-pressure injection device and a main shaft driving device, and wherein the motion of main shaft driving device realization has circumferential rotation and axially reciprocating simultaneously.
Described reinforcement abrasive is formed by mixing steel ball, forced fluid and grounds travel, and its weight percent proportioning is:
Mix steel ball 65～75%
Forced fluid 15～25%
Grounds travel 5～10%
The metal works of described rotation, its rotation are to be driven by the main shaft driving device of strengthening attrition process equipment.
After strengthening attrition process, the metal works surface has residual compressive stress and is-750～-1500MPa.
After strengthening attrition process, the metal works surface quality is V0.8～V0.4.
The invention has the beneficial effects as follows, adopt the inventive method processing equipment parts, also effectively raise its surface quality when improving the metal processing piece case hardness, prolonged its fatigue life.
Description of drawings
Accompanying drawing 1 is the inventive method flow chart;
Accompanying drawing 2 is the processing structure schematic diagram of the embodiment of the invention one;
Accompanying drawing 3 is the processing structure schematic diagram of the embodiment of the invention two.
In the above accompanying drawing: 1, the rotary disk of main shaft driving device; 2, high-pressure injection device; 3, revolving body metal works; 4, high-pressure injection device; 5, the rotary disk of main shaft driving device; 6, casing metalloid workpiece.
The specific embodiment
Below in conjunction with drawings and Examples the present invention is further described:
Embodiment one:
As shown in Figure 2, a kind of mechanical surface is strengthened the method for attrition process, reinforcement attrition process for revolving body metal works 3 surfaces, employing at the gyroaxis of the rotary disk 1 of main shaft driving device in the heart, utilizing anchor clamps that the end face of revolving body workpieces 3 is close to conspires to create row and its center and rotary disk to turn round 1 centrally aligned coaxial, being by 75% mixing steel ball, the reinforcement abrasive that 20% forced fluid and 5% grounds travel are formed is packed into and is strengthened the high-pressure injection device 2 of attrition process equipment, utilize high-pressure injection device 2 to be ejected into revolving body metal works 3 finished surfaces strengthening abrasive on the one hand by the mode of high-pressure injection, main shaft driving device drives revolving body metal works 3 and produces circumferential movement and axial moving back and forth on the one hand, increase along with process time, the collision on revolving body metal works 3 surfaces and micro-cutting just are tending towards even, process the surface have residual compressive stress and reach-813～-1427MPa, surface roughness reaches V0.6, with rolling process, the shot-peening method is compared, not only do not cause flow harden, and when on average having improved the about 2HRC of case hardness, but also surface roughness has on average been reduced by 0.09 μ m, reach the purpose that not only improves its surface strength but also improve its surface quality, prolonged its fatigue life.
Embodiment two:
As shown in Figure 3, a kind of mechanical surface is strengthened the method for attrition process, reinforcement attrition process for casing metalloid surface of the work 6, anchor clamps are loaded onto in employing five equilibrium on the cylindrical of the rotary disk 5 of main shaft driving device, need are strengthened casing metalloid workpiece 6 clampings of grinding to anchor clamps, again being by 72% mixing steel ball, the reinforcement abrasive that 18% forced fluid and 10% grounds travel are formed is packed into and is strengthened the high-pressure injection device 4 of attrition process equipment, utilize high-pressure injection device 4 to be ejected into casing metalloid workpiece 6 finished surfaces strengthening abrasive on the one hand by the mode of high-pressure injection, main shaft driving device drives casing metalloid workpiece 6 and produces circumferential movement and axial moving back and forth on the one hand, increase along with process time, the collision and the micro-cutting on casing metalloid workpiece 6 surfaces just are tending towards even, process the surface have residual compressive stress and reach-767～-1410MPa, surface roughness reaches V0.5, reach the purpose that not only improves its surface strength but also improve its surface quality, prolonged its fatigue life.
Should be noted that; above embodiment only is used for technical scheme of the present invention; its purpose is to allow the personage who is familiar with this technology can understand content of the present invention and enforcement according to this; can not limit protection scope of the present invention with this; all technical scheme of the present invention is carried out various changes and equivalence is replaced; and do not deviate from the principle and the scope of technical solution of the present invention, all should be encompassed among the scope of claim of the present invention.
Claims (6)
1. a mechanical surface is strengthened the method for attrition process, it is characterized in that may further comprise the steps:
(1) provide metal works, and clamping is to the anchor clamps of the main shaft driving device rotating disk of strengthening attrition process equipment;
(2) provide the reinforcement abrasive, and pack into and strengthen the high-pressure injection device of attrition process equipment;
(3) utilize the high-pressure injection device of strengthening attrition process equipment that attrition process is strengthened on the metal works surface that the reinforcement abrasive is ejected into rotation.
2. a kind of mechanical surface according to claim 1 is strengthened the method for attrition process, it is characterized in that described reinforcement attrition process equipment has a high-pressure injection device and a main shaft driving device.
3. a kind of mechanical surface according to claim 1 is strengthened the method for attrition process, it is characterized in that described reinforcement abrasive forms by mixing steel ball, forced fluid and grounds travel, and its weight percentage proportioning is:
Mix steel ball 65～75%
Forced fluid 15～25%
Grounds travel 5～10%.
4. a kind of mechanical surface according to claim 1 is strengthened the method for attrition process, it is characterized in that the metal works of described rotation, and its rotation is to be driven by the main shaft driving device of strengthening attrition process equipment.
5. a kind of mechanical surface according to claim 1 is strengthened the method for attrition process, and after it is characterized in that strengthening attrition process, the metal works surface has residual compressive stress and is-750～-1500MPa.
6. a kind of mechanical surface according to claim 1 is strengthened the method for attrition process, and after it is characterized in that strengthening attrition process, the metal works surface quality is V0.8～V0.4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010101390A CN101733707A (en) | 2010-01-25 | 2010-01-25 | Intensified abrasive machining method for mechanical surface |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010101390A CN101733707A (en) | 2010-01-25 | 2010-01-25 | Intensified abrasive machining method for mechanical surface |
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| CN101733707A true CN101733707A (en) | 2010-06-16 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104942664A (en) * | 2015-07-16 | 2015-09-30 | 广州大学 | Strengthening and grinding machine for bearings |
| CN106272096A (en) * | 2016-10-21 | 2017-01-04 | 贵州大学 | A kind of mild steel part carburizing rear surface intensifying method |
| CN109176318A (en) * | 2018-11-20 | 2019-01-11 | 广州大学 | A kind of reinforcing grinding method of form of gear tooth workpiece |
| CN109681532A (en) * | 2019-01-07 | 2019-04-26 | 广州大学 | A kind of combined machining method of roller bearing inner ring |
| CN110605668A (en) * | 2019-09-29 | 2019-12-24 | 广州大学 | Reinforced machining mechanism and equipment for machining bearing outer ring roller path |
| CN110640635A (en) * | 2019-09-24 | 2020-01-03 | 广州大学 | Coating-writing type metal workpiece surface reinforced grinding processing method and equipment |
| CN110815063A (en) * | 2019-11-12 | 2020-02-21 | 广州大学 | Reinforced grinding equipment for processing bearing outer ring raceway |
-
2010
- 2010-01-25 CN CN201010101390A patent/CN101733707A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104942664A (en) * | 2015-07-16 | 2015-09-30 | 广州大学 | Strengthening and grinding machine for bearings |
| CN106272096A (en) * | 2016-10-21 | 2017-01-04 | 贵州大学 | A kind of mild steel part carburizing rear surface intensifying method |
| CN106272096B (en) * | 2016-10-21 | 2018-10-12 | 贵州大学 | A kind of low-carbon steel part carburizing rear surface intensifying method |
| CN109176318A (en) * | 2018-11-20 | 2019-01-11 | 广州大学 | A kind of reinforcing grinding method of form of gear tooth workpiece |
| CN109681532A (en) * | 2019-01-07 | 2019-04-26 | 广州大学 | A kind of combined machining method of roller bearing inner ring |
| CN110640635A (en) * | 2019-09-24 | 2020-01-03 | 广州大学 | Coating-writing type metal workpiece surface reinforced grinding processing method and equipment |
| CN110640635B (en) * | 2019-09-24 | 2020-12-08 | 广州大学 | Coating-writing type metal workpiece surface reinforced grinding processing method and equipment |
| CN110605668A (en) * | 2019-09-29 | 2019-12-24 | 广州大学 | Reinforced machining mechanism and equipment for machining bearing outer ring roller path |
| CN110605668B (en) * | 2019-09-29 | 2020-11-13 | 广州大学 | Reinforced machining mechanism and equipment for machining bearing outer ring roller path |
| CN110815063A (en) * | 2019-11-12 | 2020-02-21 | 广州大学 | Reinforced grinding equipment for processing bearing outer ring raceway |
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Application publication date: 20100616 |