CN104608042A - Forced turbulent flow hole surface finish machining technology - Google Patents
Forced turbulent flow hole surface finish machining technology Download PDFInfo
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- 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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- 238000003754 machining Methods 0.000 title claims description 3
- 238000005516 engineering process Methods 0.000 title description 3
- 239000012530 fluid Substances 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000007730 finishing process Methods 0.000 claims abstract description 13
- 230000005514 two-phase flow Effects 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 4
- 239000006061 abrasive grain Substances 0.000 claims description 12
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims 5
- 239000011148 porous material Substances 0.000 claims 1
- 230000000630 rising effect Effects 0.000 claims 1
- 239000002245 particle Substances 0.000 abstract description 36
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 238000003672 processing method Methods 0.000 abstract description 2
- 238000005096 rolling process Methods 0.000 abstract description 2
- 230000003628 erosive effect Effects 0.000 abstract 1
- 230000003746 surface roughness Effects 0.000 description 6
- 230000007547 defect Effects 0.000 description 3
- 238000009499 grossing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B31/00—Machines 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
- B24B31/10—Machines 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
一种涡流式孔表面滚磨光整加工装置及其加工方法，属于机械零件表面光整加工技术领域，其特征在于是一种利用金属在液粒两相流冲刷腐蚀磨损原理，将光整部件放置在含有磨粒和液体的工件孔腔内，通过光整部件的高速回转将孔腔里的液粒两相流体混合，并形成强制湍流，使磨料颗粒均匀分散于流体中，磨料颗粒跟随液体紧贴工件孔表面高速运动，对孔表面实现滑擦、磨削并通过光整部件沿着轴向做进给运动，实现整个孔表面的光整加工的工艺，该工艺简单易于实现，成本低廉，可靠性高，通过外部控制电机转速的大小控制孔腔内液粒两相流强制湍流的紊乱程度以及磨料颗粒对孔表面的作用力，从而实现稳定加工，保证了加工后表面质量的均匀性。
A vortex-type hole surface rolling finish processing device and its processing method, which belong to the technical field of mechanical parts surface finish processing, is characterized in that it uses the principle of erosion, corrosion and wear of metal in liquid particle two-phase flow, and places the finish parts In the workpiece cavity containing abrasive particles and liquid, the two-phase fluid of liquid particles in the cavity is mixed by the high-speed rotation of the finishing part, and a forced turbulent flow is formed, so that the abrasive particles are evenly dispersed in the fluid, and the abrasive particles follow the liquid tightly. The hole surface of the paste workpiece moves at high speed, and the surface of the hole is wiped and ground, and the finishing part is fed along the axial direction to realize the finishing process of the entire hole surface. This process is simple, easy to implement, and low in cost. High reliability, by externally controlling the speed of the motor to control the turbulence of the forced turbulence of the liquid-particle two-phase flow in the cavity and the force of the abrasive particles on the hole surface, so as to achieve stable processing and ensure the uniformity of the processed surface quality.
Description
技术领域technical field
本发明一种强制湍流孔表面光整加工工艺，属于零件表面光整加工技术领域，具体涉及大尺寸孔表面自由磨具光整加工技术，主要针对气缸套、液压缸等孔表面的光整加工。The invention discloses a forced turbulent hole surface finishing process, which belongs to the technical field of component surface finishing, and specifically relates to a large-size hole surface free abrasive finishing technology, mainly aimed at the surface finishing of cylinder liners, hydraulic cylinders and other hole surfaces.
背景技术Background technique
孔表面质量对于某些机械产品的使用性能、疲劳寿命有非常重要的作用，一些表面缺陷是造成机器运转异常、提前失效的直接原因。现今的孔表面光整加工技术主要有：磨料流、滚磨、气粒两相流、磁力研磨等，每种加工方法都能够在一定程度上实现孔的光整加工，都有其优点，但不可避免的会有一些难以克服的缺点。以气粒两相流光整加工工艺为例，其主要原理是利用高压气体采用切向进流的方式形成螺旋运动，在这种强制螺旋运动下，预先放入工件孔内的磨料颗粒也会做螺旋运动，因此会对工件表面产生磨削、刻划、滚压的作用，实现工件孔表面的光整加工，但该工艺的缺陷是气流沿轴向的能量衰减，以致离进气口较远的位置，气体的能量已经不能带动磨料颗粒作螺旋运动，导致孔表面沿轴向加工质量不均匀，此外在实践中也很难保证气压值的稳定。在零件表面光整加工中，孔表面光整加工相对较困难，特别是大尺寸阶梯孔、异型孔等孔表面。例如工业应用中液压缸采用普通珩磨，超声珩磨加工内表面，普通珩磨工艺油石易堵塞，加工效率低，噪声大，加工表面质量差，超声珩磨虽然克服了普通珩磨的一些缺陷，但是结构偏于复杂，改善表面应力等表面完整性指标有限。为此，如何有效解决孔表面的光整加工问题，对于提高零件质量，乃至我国的装备制造水平具有重要意义。The surface quality of the hole plays a very important role in the performance and fatigue life of some mechanical products. Some surface defects are the direct cause of abnormal operation and premature failure of the machine. Today’s hole surface finishing technologies mainly include: abrasive flow, tumbling, air particle two-phase flow, magnetic grinding, etc. Each processing method can achieve hole finishing to a certain extent, and has its advantages, but cannot There will be some insurmountable disadvantages to avoid. Taking the air-particle two-phase flow finishing process as an example, its main principle is to use high-pressure gas to form a spiral motion by tangential flow. Under this forced spiral motion, the abrasive particles pre-placed in the workpiece hole will also be made Spiral motion, so it will have the effect of grinding, scoring and rolling on the surface of the workpiece, and realize the finishing of the surface of the workpiece hole, but the defect of this process is that the energy of the airflow along the axial direction is attenuated, so that it is far away from the air inlet The energy of the gas can no longer drive the abrasive particles to perform spiral motion, resulting in uneven processing quality along the axial direction of the hole surface. In addition, it is difficult to ensure the stability of the air pressure value in practice. In the surface finishing of parts, it is relatively difficult to finish the surface of holes, especially the surface of large-sized stepped holes and special-shaped holes. For example, in industrial applications, the hydraulic cylinder adopts ordinary honing, and the inner surface is processed by ultrasonic honing. The ordinary honing process is easy to block the whetstone, the processing efficiency is low, the noise is large, and the processed surface quality is poor. Although ultrasonic honing overcomes some defects of ordinary honing, the structure is biased. Complex, limited surface integrity indicators such as improved surface stress. For this reason, how to effectively solve the problem of finishing the hole surface is of great significance for improving the quality of parts and even the level of equipment manufacturing in our country.
发明内容Contents of the invention
本发明一种强制湍流孔表面光整加工工艺，目的在于为有效解决上述现有技术存在的孔表面光整加工的难题。提供一种能够自动加工直孔、阶梯孔、异型孔和盲孔等较难加工的孔表面的工艺方法，并可通过外部控制，实时控制加工参数，达到加工的自动化和可控化。The invention is a forced turbulent hole surface finishing process, which aims to effectively solve the problem of hole surface finishing in the prior art. Provides a process method that can automatically process straight holes, stepped holes, special-shaped holes, blind holes and other difficult-to-process hole surfaces, and can control the processing parameters in real time through external control to achieve automatic and controllable processing.
本发明一种孔表面光整加工工艺，其特征在于是一种利用金属在液粒两相流冲刷腐蚀磨损原理，将光整部件放置在含有磨粒和液体的工件孔腔内，通过光整部件的高速回转将孔腔里的液粒两相流体混合，并形成强制湍流，使磨料颗粒均匀分散于流体中，磨料颗粒跟随液体紧贴工件孔表面高速运动，对孔表面实现滑擦、磨削并通过光整部件沿着轴向做进给运动，实现整个孔表面的光整加工的工艺，该工艺所采用的光整加工装置，包括电机1、联轴器2、叶轮轴3、流体箱4、液体5、叶轮6、磨料颗粒7、支撑盘8和工件9；所述的叶轮6和支撑盘8安装在叶轮轴3上，形成光整部件，随着叶轮轴共同回转；所述的光整部件通过联轴器2与电机1相连，置于工件9的孔内；所述的光整部件沿着轴向做进给运动；所述的叶轮6是三叶片结构；所述的支撑盘直径比工件孔径小0.1mm～0.5mm，主要起密封和支撑作用，防止小尺寸磨料颗粒流入外部的流体箱内；所述的工件9置于流体箱4中；所述的流体箱4作用是保持工件内混合流体不会流出；所述的叶轮6转速、液体5成分、磨料颗粒7的粒径大小，材料种类参数根据不同的加工需求进行改变，所述的电机转速范围是200r/min～1700r/min，转速调节通过变频器实现；所述的工件进给运动的进给速度根据电机转速确定，孔腔内磨料速度同样确定出进给速度这里n为电机转速(r/min)，r为工件孔半径(m)，R为磨料颗粒半径(m)，所述的叶轮6有效加工孔内径范围为：D＝d+(10mm～40mm)，其中d为叶轮直径，d的单位为mm，通过改变叶轮的外径以适应不同孔径的孔表面光整加工。The invention is a hole surface finishing process, which is characterized in that it utilizes the principle of corrosion and wear of metal in the two-phase flow of liquid particles, and places the finishing parts in the cavity of the workpiece containing abrasive particles and liquid, and passes through the finishing parts. The high-speed rotation mixes the liquid-particle two-phase fluid in the cavity, and forms a forced turbulent flow, so that the abrasive particles are evenly dispersed in the fluid. The abrasive particles follow the liquid and move closely to the surface of the workpiece hole at high speed, and realize sliding and grinding on the surface of the hole. And the process of finishing the entire hole surface is realized by feeding the finishing parts along the axial direction. The finishing device used in this process includes a motor 1, a coupling 2, an impeller shaft 3, and a fluid box 4. Liquid 5, impeller 6, abrasive particles 7, support disc 8 and workpiece 9; the impeller 6 and the support disc 8 are installed on the impeller shaft 3 to form a smooth part, which rotates together with the impeller shaft; The finishing part is connected with the motor 1 through the coupling 2, and placed in the hole of the workpiece 9; the finishing part is fed along the axial direction; the impeller 6 is a three-blade structure; the support The diameter of the disc is 0.1mm-0.5mm smaller than the aperture of the workpiece, which mainly acts as a seal and support to prevent small-sized abrasive particles from flowing into the external fluid box; the workpiece 9 is placed in the fluid box 4; the fluid box 4 functions It is to keep the mixed fluid in the workpiece from flowing out; the speed of the impeller 6, the composition of the liquid 5, the particle size of the abrasive particles 7, and the parameters of the material type are changed according to different processing requirements. The speed range of the motor is 200r/min ～1700r/min, the speed adjustment is realized by the frequency converter; the feed speed of the workpiece feed movement is determined according to the motor speed, and the abrasive speed in the cavity Also determine the feed rate Here n is the motor speed (r/min), r is the workpiece hole radius (m), R is the abrasive grain radius (m), and the effective machining hole inner diameter range of the impeller 6 is: D=d+(10mm～40mm), Among them, d is the diameter of the impeller, and the unit of d is mm. By changing the outer diameter of the impeller to adapt to the surface finishing of holes with different apertures.
本发明一种强制湍流孔表面光整加工工艺的优点为：该工艺简单易于实现，成本低廉，可靠性高，能够实现孔表面的光整加工，并且同一尺寸的装置可以适应一定直径范围内孔表面的光整加工。本发明的有益效果在于：本发明通过外部控制电机转速的大小控制孔腔内液粒两相流强制湍流的紊乱程度以及磨料颗粒对孔表面的作用力，从而实现稳定加工，保证了加工后表面质量的均匀性；该工艺及附属装置结构简单、占地面积小、控制方便、易实现自动化。The advantages of a forced turbulent hole surface finishing process of the present invention are: the process is simple and easy to implement, low in cost, high in reliability, can realize the finishing process of the hole surface, and the device of the same size can adapt to the hole surface within a certain diameter range finishing processing. The beneficial effects of the present invention are: the present invention controls the degree of turbulence of the forced turbulent flow of the liquid-particle two-phase flow in the cavity and the force of the abrasive particles on the surface of the hole by externally controlling the size of the motor speed, thereby realizing stable processing and ensuring the smoothness of the surface after processing. Uniformity of quality; the process and auxiliary devices have simple structure, small footprint, convenient control and easy automation.
附图说明：Description of drawings:
图1是本发明的原理示意图。Fig. 1 is a schematic diagram of the principle of the present invention.
图2是工件加工前后效果对比图。Figure 2 is a comparison diagram of the effect before and after the workpiece processing.
图中：1-电机，2-联轴器，3-叶轮轴，4-流体箱，5-液体，6-叶轮，7-磨料颗粒，8-支撑盘，9-工件。In the figure: 1-motor, 2-coupling, 3-impeller shaft, 4-fluid box, 5-liquid, 6-impeller, 7-abrasive particles, 8-support disc, 9-workpiece.
具体实施方式：Detailed ways:
实施方式1：Implementation mode 1:
先将工件9放入具有液体的流体箱4内，将与电机1连接后的光整部件放入工件9的被加工孔内部，然后将的磨料颗粒7放入工件9的被加工孔内部。启动电机1，电机1通过联轴器2带动光整部件旋转，转速达到200r/min后，扰动孔腔内的液粒两相流体形成强制湍流，从而带动磨料颗粒7紧贴工件孔表面运动，并且对孔表面进行划擦、磨削，实现孔表面的光整加工。为实现对孔表面整体光整加工，加工过程中使光整部件沿做轴向进给运动。其叶轮6外径为Φ108mm，叶轮轴3直径为Φ12mm，工件内径130mm，磨料颗粒7粒径为Φ5mm，使用粗糙度仪测量加工前的孔表面粗糙度值为Ra10.001μm，其具体步骤：First put the workpiece 9 into the fluid tank 4 with liquid, put the finishing part connected with the motor 1 into the processed hole of the workpiece 9, and then put the abrasive grains 7 into the processed hole of the workpiece 9. Start the motor 1, and the motor 1 drives the smoothing part to rotate through the coupling 2. After the speed reaches 200r/min, the liquid-particle two-phase fluid in the disturbed cavity forms a forced turbulent flow, thereby driving the abrasive particles 7 to move close to the surface of the workpiece hole. And the surface of the hole is scratched and ground to achieve smooth processing of the hole surface. In order to realize the overall finishing of the hole surface, the finishing part is moved along the axial direction during the processing. The outer diameter of the impeller 6 is Φ108mm, the diameter of the impeller shaft 3 is Φ12mm, the inner diameter of the workpiece is 130mm, the diameter of the abrasive particles 7 is Φ5mm, and the surface roughness value of the hole before processing is measured by a roughness meter as Ra10.001μm. The specific steps are:
1、先将工件9放入具有一定量液体的流体箱4内。1. First put the workpiece 9 into the fluid tank 4 with a certain amount of liquid.
2、将与电机连接后的光整部件放入工件9的被加工孔内部。2. Put the finishing part connected with the motor into the processed hole of the workpiece 9 .
3、将一定量的磨料颗粒7放入工件9的被加工孔内部。3. Put a certain amount of abrasive particles 7 into the processed hole of the workpiece 9 .
4、接通电源，通过调整变频器，并将光整部件的转速值通过变频器设定为600r/min。4. Turn on the power, adjust the frequency converter, and set the speed value of the finishing part to 600r/min through the frequency converter.
5、光整部件开始旋转并且对孔表面进行加工。5. The finishing part starts to rotate and process the surface of the hole.
6、加工完毕，取出光整部件。6. After processing, take out the finishing parts.
加工时间10min后，使用粗糙度仪测量加工后的孔表面粗糙度值为Ra4.236μm。After processing for 10 minutes, use a roughness meter to measure the surface roughness value of the processed hole as Ra4.236 μm.
实施方式2:Implementation mode 2:
先将工件9放入具有液体的流体箱4内，将与电机1连接后的光整部件放入工件9的被加工孔内部，然后将的磨料颗粒7放入工件9的被加工孔内部。启动电机1，电机1通过联轴器2带动光整部件旋转，转速达到200r/min后，扰动孔腔内的液粒两相流体形成强制湍流，从而带动磨料颗粒7紧贴工件孔表面运动，并且对孔表面进行划擦、磨削，实现孔表面的光整加工。为实现对孔表面整体光整加工，加工过程中使光整部件沿做轴向进给运动。其叶轮6外径为Φ108mm，叶轮轴3直径为Φ12mm，工件内径130mm，磨料颗粒7粒径为Φ5mm，使用粗糙度仪测量加工前的孔表面粗糙度值为Ra10.001μm，其具体步骤：First put the workpiece 9 into the fluid tank 4 with liquid, put the finishing part connected with the motor 1 into the processed hole of the workpiece 9, and then put the abrasive grains 7 into the processed hole of the workpiece 9. Start the motor 1, and the motor 1 drives the smoothing part to rotate through the coupling 2. After the speed reaches 200r/min, the liquid-particle two-phase fluid in the disturbed cavity forms a forced turbulent flow, thereby driving the abrasive particles 7 to move close to the surface of the workpiece hole. And the surface of the hole is scratched and ground to achieve smooth processing of the hole surface. In order to realize the overall finishing of the hole surface, the finishing part is moved along the axial direction during the processing. The outer diameter of the impeller 6 is Φ108mm, the diameter of the impeller shaft 3 is Φ12mm, the inner diameter of the workpiece is 130mm, the diameter of the abrasive particles 7 is Φ5mm, and the surface roughness value of the hole before processing is measured by a roughness meter as Ra10.001μm. The specific steps are:
1、先将工件9放入具有一定量液体的流体箱4内。1. First put the workpiece 9 into the fluid tank 4 with a certain amount of liquid.
2、将与电机连接后的光整部件放入工件9的被加工孔内部。2. Put the finishing part connected with the motor into the processed hole of the workpiece 9 .
3、将一定量的磨料颗粒7放入工件9的被加工孔内部。3. Put a certain amount of abrasive particles 7 into the processed hole of the workpiece 9 .
4、接通电源，通过调整变频器，并将光整部件的转速值通过变频器设定为1200r/min。4. Turn on the power, adjust the frequency converter, and set the speed value of the finishing part to 1200r/min through the frequency converter.
5、光整部件开始旋转并且对孔表面进行加工。5. The finishing part starts to rotate and process the surface of the hole.
6、加工完毕，取出光整部件。6. After processing, take out the finishing parts.
加工时间10min后，使用粗糙度仪测量加工后的孔表面粗糙度值为Ra1.742μm。After processing for 10 minutes, use a roughness meter to measure the surface roughness value of the processed hole as Ra1.742 μm.
实施方式3：Implementation mode 3:
先将工件9放入具有液体的流体箱4内，将与电机1连接后的光整部件放入工件9的被加工孔内部，然后将的磨料颗粒7放入工件9的被加工孔内部。启动电机1，电机1通过联轴器2带动光整部件旋转，转速达到200r/min后，扰动孔腔内的液粒两相流体形成强制湍流，从而带动磨料颗粒7紧贴工件孔表面运动，并且对孔表面进行划擦、磨削，实现孔表面的光整加工。为实现对孔表面整体光整加工，加工过程中使光整部件沿做轴向进给运动。其支架叶轮6外径为Φ108mm，工件内径130mm，磨料颗粒7粒径为Φ2mm，使用粗糙度仪测量加工前的孔表面粗糙度值为Ra10.001μm，其具体步骤：First put the workpiece 9 into the fluid tank 4 with liquid, put the finishing part connected with the motor 1 into the processed hole of the workpiece 9, and then put the abrasive grains 7 into the processed hole of the workpiece 9. Start the motor 1, and the motor 1 drives the smoothing part to rotate through the coupling 2. After the speed reaches 200r/min, the liquid-particle two-phase fluid in the disturbed cavity forms a forced turbulent flow, thereby driving the abrasive particles 7 to move close to the surface of the workpiece hole. And the surface of the hole is scratched and ground to achieve smooth processing of the hole surface. In order to realize the overall finishing of the hole surface, the finishing part is moved along the axial direction during the processing. The outer diameter of the support impeller 6 is Φ108mm, the inner diameter of the workpiece is 130mm, and the particle size of the abrasive particles 7 is Φ2mm. The surface roughness value of the hole before processing is measured by a roughness meter as Ra10.001μm. The specific steps are:
1、先将工件9放入具有一定量液体的流体箱4内。1. First put the workpiece 9 into the fluid tank 4 with a certain amount of liquid.
2、将与电机连接后的光整部件放入工件9的被加工孔内部。2. Put the finishing part connected with the motor into the processed hole of the workpiece 9 .
3、将一定量的磨料颗粒7放入工件9的被加工孔内部。3. Put a certain amount of abrasive particles 7 into the processed hole of the workpiece 9 .
4、接通电源，通过调整变频器，并将光整部件的转速值通过变频器设定为1500r/min。4. Turn on the power, adjust the frequency converter, and set the speed value of the finishing part to 1500r/min through the frequency converter.
5、光整部件开始旋转并且对孔表面进行加工。5. The finishing part starts to rotate and process the surface of the hole.
6、加工完毕，取出光整部件。6. After processing, take out the finishing parts.
加工5min后，使用粗糙度仪测量加工后的孔表面粗糙度值为Ra0.671μm。After processing for 5 minutes, use a roughness meter to measure the surface roughness value of the processed hole as Ra0.671 μm.
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Cited By (3)
| 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 |
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2015
- 2015-01-23 CN CN201510035177.XA patent/CN104608042A/en active Pending
Cited By (5)
| 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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