CN210255755U - High-frequency pulse current assisted surface shot blasting strengthening processing device - Google Patents
High-frequency pulse current assisted surface shot blasting strengthening processing device Download PDFInfo
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- CN210255755U CN210255755U CN201921080124.XU CN201921080124U CN210255755U CN 210255755 U CN210255755 U CN 210255755U CN 201921080124 U CN201921080124 U CN 201921080124U CN 210255755 U CN210255755 U CN 210255755U
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Abstract
The utility model discloses a high-frequency pulse current-assisted surface shot peening strengthening device, which is characterized by comprising a surface shot peening strengthening device and a pulse power supply device; the surface shot peening strengthening device comprises a shot blasting chamber, a shot blasting mechanism which is arranged on the shot blasting chamber and sprays shot blasting into the shot blasting chamber, and a workpiece clamping mechanism which is arranged in the shot blasting chamber and used for fixing a workpiece; the pulse power supply device is connected to a workpiece to apply a pulse current to the workpiece during shot blasting. The utility model discloses an utilize high frequency pulse current's electroplasticity effect, improve the plasticity on aviation spare parts surfaces such as titanium alloy, aluminum alloy, reduce hardness, improve the effect that spare parts surface peening is reinforceed, improve the wearability and the fatigue strength of aviation spare parts.
Description
Technical Field
The utility model relates to a metal surface reinforces technical field, especially relates to the surface strengthening technical field of complicated part, specifically includes the supplementary surface shot peening strengthening processingequipment of high frequency pulse current.
Background
The titanium alloy, the aluminum alloy and other aviation materials are influenced by alternating load and external environment in the service process, and are very easy to generate fatigue fracture; fretting wear is also very likely to occur at bolted joints, riveted joints, dovetail joints between turbine blades and the disk, and the like. Fatigue cracks and fretting wear become two main forms of failure of aerospace parts such as titanium alloy, aluminum alloy and the like.
In order to improve the fatigue strength and wear resistance of aerospace parts such as titanium alloys and aluminum alloys, it is necessary to perform a surface strengthening treatment on the parts. The shot peening strengthening treatment selects fine shots, the shots impact the surface of the workpiece at a high speed, the surface layer of the workpiece is subjected to elastic-plastic deformation, the surface roughness is reduced, the surface hardening strength is improved, and the residual compressive stress is obtained on the surface of the workpiece, so that the wear resistance and the fatigue strength of aviation parts such as titanium alloy, aluminum alloy and the like are improved. However, the conventional surface shot peening has difficulty in obtaining high surface hardening strength, deep surface hardening depth and large surface residual compressive stress, and has very limited improvement on the wear resistance and fatigue strength of aviation parts.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem of current aviation spare part surface strengthening treatment such as titanium alloy, aluminum alloy, the utility model aims to provide a simple structure's supplementary surface shot peening strengthening processing device of high frequency pulse current through the additional action of high frequency pulse current, improves the effect that workpiece surface shot peening is reinforceed, makes the wear resistance and the fatigue strength of aviation spare parts such as titanium alloy, aluminum alloy obtain improving.
In order to realize the purpose of the utility model, the utility model discloses the technical scheme who adopts as follows:
a high-frequency pulse current-assisted surface shot peening strengthening processing device comprises a surface shot peening strengthening device and a pulse power supply device; the surface shot peening strengthening device comprises a shot blasting chamber, a shot blasting mechanism which is arranged on the shot blasting chamber and sprays shot blasting into the shot blasting chamber, and a workpiece clamping mechanism which is arranged in the shot blasting chamber and used for fixing a workpiece; the pulse power supply device is connected to a workpiece to apply a pulse current to the workpiece during shot blasting.
In a preferred embodiment of the present invention, the pulse power supply device includes a pulse power supply and an oscilloscope connected in series, an output end of the pulse power supply is connected to the workpiece, another output end of the pulse power supply is connected to an input end of the oscilloscope, and an output end of the oscilloscope is connected to the workpiece. The oscilloscope is used for monitoring the current and the voltage in the workpiece.
In a preferred embodiment of the present invention, the workpiece holding mechanism is a pair of pliers.
In a preferred embodiment of the present invention, the shot blasting mechanism comprises a power mechanism, and a shot separating wheel and an impeller driven by the power mechanism, wherein the impeller is located at the periphery of the shot separating wheel; the shot blasting mechanism also comprises an orientation sleeve positioned between the impeller and the shot separating wheel, a shot inlet pipe and a shot separating port are arranged on the orientation sleeve, during shot blasting, the power mechanism drives the shot separating wheel and the impeller to rotate, the shot separating wheel enables shot blasting entering from the shot inlet pipe to obtain certain rotary motion, the shot blasting is dispersed into the orientation sleeve by centrifugal force and is sprayed out from the shot separating port to be thrown onto blades of the impeller, and finally the shot blasting mechanism is thrown onto the surface of a workpiece in the shot blasting chamber by the blades of the impeller.
In a preferred embodiment of the present invention, the power mechanism is driven by a motor.
In a preferred embodiment of the present invention, the vane, the pellet wheel and the orientation sleeve are made of wear-resistant nickel-based alloy materials.
In a preferred embodiment of the present invention, the material of the shot is alumina.
Compared with the prior art, the utility model discloses an obvious advantage is:
1. the utility model discloses a surface shot peening strengthening equipment utilizes the effect of centrifugal force to transmit for the certain kinetic energy of peening, simple structure, and the cost is lower.
2. The utility model discloses not only can be used for aviation spare parts surface reinforcement such as titanium alloy, aluminum alloy. The utility model discloses an utilize the coupling effect of high frequency pulse current electron wind-force and fuel effect to produce the electro-plastic effect to metal parts, improve the plasticity of spare part superficial layer, reach the purpose that effectively improves spare part superficial layer sclerosis degree, residual compressive stress. Meanwhile, due to the improvement of the atomic diffusion capability by the electronic wind power of the high-frequency pulse current, the surface layer of the part can generate obvious phenomena of plasticity improvement and hardness reduction at a lower temperature (less than or equal to 100 ℃), and the oxidation of the part at a high temperature is avoided.
3. The utility model discloses utilize the supplementary surface shot-peening of high frequency pulse current to reinforce, wherein when high frequency pulse current flowed through metal work piece, under the combined action of electromagnetic field, there was the electric current only in metal work piece superficial layer, and skin effect is called to this kind of phenomenon. The skin effect enables the high-frequency pulse current to only affect the microstructure and the mechanical property of the surface of the metal workpiece, and the microstructure of the internal material is hardly affected.
Drawings
FIG. 1 is a schematic structural view of a high-frequency pulse current-assisted surface shot peening apparatus according to the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1, there is shown a high-frequency pulse current-assisted surface shot peening apparatus comprising a surface shot peening apparatus and a pulse power supply apparatus; the surface shot peening device comprises a shot chamber 17, a shot blasting mechanism which is arranged on the shot chamber 17 through a bottom plate 16 and sprays shot into the shot chamber 17, and a workpiece clamping mechanism which is arranged in the shot chamber 17 and is used for fixing a workpiece 18; the pulse power supply device is connected to the workpiece 18 to apply a pulse current to the workpiece 18 during shot blasting.
The workpiece clamping mechanism is a bench clamp which is not different from the existing bench clamp and also comprises a bench clamp body 19 and a bench clamp screw rod 20. The vise screw 20 is rotated to clamp and unclamp the workpiece 18.
The pulse power supply device comprises a pulse power supply 22 and an oscilloscope 21 which are connected in series, wherein one output end of the pulse power supply 22 is connected with the workpiece 18, the other output end of the pulse power supply 22 is connected with the input end of the oscilloscope 21, and the output end of the oscilloscope 21 is connected with the workpiece 18. Oscilloscope 21 is used to monitor the current and voltage in workpiece 19.
The shot blasting mechanism comprises a power mechanism, a pill separating wheel 13 and an impeller, wherein the pill separating wheel 13 and the impeller are driven by the power mechanism, the impeller is positioned in an impeller box body 11 and positioned on the periphery of the pill separating wheel 13, an orientation sleeve 14 is arranged between the impeller and the pill separating wheel 13, and a pill inlet pipe 15 and a pill separating port 14a are arranged on the orientation sleeve 14.
The power mechanism comprises a main shaft 2 and a bearing support seat 5, wherein the main shaft 2 is supported in the bearing support seat 5 through a bearing 4, a bearing top sleeve 3 and a felt ring oil seal 6. The bearing support 5 is fixed on the impeller box body 11 through a fixing seat 8.
The outer end of the main shaft 2 is keyed with a main shaft belt wheel 1, and the main shaft belt wheel 1 is in driving connection with the motor through a belt transmission mechanism. A connecting disc 7 is arranged at the inner end of the main shaft 2 through a common flat key 23, the connecting disc 7 is connected with the lower end 9 of the impeller through a fastener, and the pill distributing wheel 13 is fixed at the inner end of the main shaft 2 through a fastener. The orientation sleeve 14 is fixed on the impeller casing 11 through the orientation sleeve backing plate 12.
The blades 10, the shot separating wheel 13 and the directional sleeve 14 in the impeller are made of wear-resistant nickel-based alloy materials so as to prolong the service life.
The utility model discloses main shaft 2 among the power unit in the surface shot peening strengthening equipment adopts motor and main shaft band pulley 1 to drive and rotates, the rotation of main shaft 2 drives shot separating wheel 13 and impeller rotation, shot separating wheel 13 makes the peening that gets into by advancing the ball pipe 15 obtain certain rotary motion, disperse 14 directional covers with the peening by centrifugal force, and have on the blade 10 of ball mouth 14a blowout throwing to the impeller, work piece 18 in the peening room 17 is thrown to the final blade 10 by the impeller is on the surface.
The utility model discloses the supplementary surface shot peening strengthening processing method of high frequency pulse current carries out according to following step:
clamping a workpiece on a bench clamp, and connecting the workpiece with a 21 oscilloscope and a 22 pulse power supply;
turning on a pulse power supply and adjusting power supply parameters;
and step three, after the surface temperature of the workpiece is constant, turning on a power supply of a motor of the shot blasting machine, pouring shot blasting into the shot inlet pipe 15 after the rotating speed of the main shaft 2 is stable, and performing shot blasting reinforcement on the surface of the workpiece 18 under the action of high-frequency pulse current.
The utility model discloses the processing technology parameter of the supplementary surface shot peening strengthening processing device of high-frequency pulse current is: the shot blasting diameter is 0.8mm, the total shot amount is 4800kg/h, the rated power of a motor is 7.5KW, the rated rotating speed is 1440r/min, the frequency of a pulse power supply is 500-700 HZ, the output current is 30-60A, and the charging voltage is 30-60V. The material of the shot blasting is alumina.
Claims (7)
1. A high-frequency pulse current-assisted surface shot peening strengthening processing device is characterized by comprising a surface shot peening strengthening device and a pulse power supply device; the surface shot peening strengthening device comprises a shot blasting chamber, a shot blasting mechanism which is arranged on the shot blasting chamber and sprays shot blasting into the shot blasting chamber, and a workpiece clamping mechanism which is arranged in the shot blasting chamber and used for fixing a workpiece; the pulse power supply device is connected to a workpiece to apply a pulse current to the workpiece during shot blasting.
2. The apparatus according to claim 1, wherein the pulse power supply unit comprises a pulse power supply and an oscilloscope connected in series, one output terminal of the pulse power supply is connected to the workpiece, the other output terminal of the pulse power supply is connected to an input terminal of the oscilloscope, an output terminal of the oscilloscope is connected to the workpiece, and the oscilloscope is used for monitoring the current and voltage in the workpiece.
3. A high-frequency pulse current-assisted surface shot peening apparatus according to claim 1, wherein said workpiece holding mechanism is a vise.
4. A high-frequency pulse current-assisted surface shot peening apparatus as claimed in claim 1, wherein said shot peening mechanism includes a power mechanism, and a shot-peening wheel and an impeller driven by said power mechanism, said impeller being located at the periphery of said shot-peening wheel; the shot blasting mechanism also comprises an orientation sleeve positioned between the impeller and the shot separating wheel, a shot inlet pipe and a shot separating port are arranged on the orientation sleeve, during shot blasting, the power mechanism drives the shot separating wheel and the impeller to rotate, the shot separating wheel enables shot blasting entering from the shot inlet pipe to obtain certain rotary motion, the shot blasting is dispersed into the orientation sleeve by centrifugal force and is sprayed out from the shot separating port to be thrown onto blades of the impeller, and finally the shot blasting mechanism is thrown onto the surface of a workpiece in the shot blasting chamber by the blades of the impeller.
5. The apparatus of claim 4, wherein the power mechanism is driven by a motor.
6. The apparatus as claimed in claim 4, wherein the vanes, the impeller, and the orientation sleeve are made of wear-resistant nickel-based alloy.
7. The apparatus for high-frequency pulse current-assisted surface shot peening according to claim 1, wherein the material of the shot is alumina.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921080124.XU CN210255755U (en) | 2019-07-11 | 2019-07-11 | High-frequency pulse current assisted surface shot blasting strengthening processing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921080124.XU CN210255755U (en) | 2019-07-11 | 2019-07-11 | High-frequency pulse current assisted surface shot blasting strengthening processing device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110253449A (en) * | 2019-07-11 | 2019-09-20 | 湖南科技大学 | A kind of the surface shot blasting strengthening processing unit (plant) and method of high-frequency pulse current auxiliary |
| CN111893278A (en) * | 2020-08-12 | 2020-11-06 | 华南理工大学 | Pulse current and shot blasting coupled metal material surface strengthening device and method |
| CN112662975A (en) * | 2020-12-10 | 2021-04-16 | 常州大学 | Strengthening method for improving high-temperature fatigue performance of aviation titanium alloy |
| CN113046531A (en) * | 2021-03-10 | 2021-06-29 | 武汉理工大学 | Method for improving surface nanocrystallization efficiency of metal material difficult to deform through in-situ electric pulse |
-
2019
- 2019-07-11 CN CN201921080124.XU patent/CN210255755U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110253449A (en) * | 2019-07-11 | 2019-09-20 | 湖南科技大学 | A kind of the surface shot blasting strengthening processing unit (plant) and method of high-frequency pulse current auxiliary |
| CN111893278A (en) * | 2020-08-12 | 2020-11-06 | 华南理工大学 | Pulse current and shot blasting coupled metal material surface strengthening device and method |
| CN112662975A (en) * | 2020-12-10 | 2021-04-16 | 常州大学 | Strengthening method for improving high-temperature fatigue performance of aviation titanium alloy |
| CN113046531A (en) * | 2021-03-10 | 2021-06-29 | 武汉理工大学 | Method for improving surface nanocrystallization efficiency of metal material difficult to deform through in-situ electric pulse |
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