The Improvement of Deep-hole Boring Machining Quality Assisted with Ultrasonic Vibration

2017 ◽  
Vol 53 (19) ◽  
pp. 143 ◽  
Author(s):  
Xiangyu ZHANG
Keyword(s):  
Ultrasonic Vibration ◽  
Deep Hole ◽  
Machining Quality

Deep Hole Machining with a Small Diameter Drill and Ultrasonic Vibration

2017 ◽  
Vol 749 ◽  
pp. 107-110
Author(s):  
Yuta Masu ◽  
Tomohito Fukao ◽  
Taiga Yasuki ◽  
Masahiro Hagino ◽  
Takashi Inoue
Keyword(s):  
Surface Roughness ◽  
Ultrasonic Vibration ◽  
Cutting Tool ◽  
Cutting Speed ◽  
Small Diameter ◽  
Maximum Amplitude ◽  
Depth Of Cut ◽  
Deep Hole ◽  
Work Material ◽  
Finished Surface

The method of imparting ultrasonic vibration to the cutting tool is known to improve the shape accuracy and finished surface roughness. However, a uniform evaluation of this function in drilling has not been achieved, and the cutting process cannot be checked from the outside. The aim of this study is to investigate the cutting characteristics in deep hole drilling when an ultrasonic vibrator on the table of a machining center provides vibration with a frequency of 20 kHz to the work piece. The ultrasonic vibrations in this system reach the maximum amplitude in the center of the work material. We evaluated the change in finished surface roughness between the section where drilling starts to the point of maximum amplitude with ultrasonic vibration. The main cutting conditions are as follows: cutting speed (V) 12.6 (mm/min); feed rate (s) 30, 60 (mm/rev); depth of cut (t) = 32 (mm); work material, tool steel; cutting tool material, HSS; point angle (σ) 118 (°); and drill diameter (φ) 4 (mm). Lubricant powder was also added to clarify the cutting effect, and compared the condition in which there was no ultrasonic vibration. The results showed that surface roughness at the point of maximum amplitude was better than that with no vibration.

Research on Deep-hole Drilling Quality of High-strength Steel With Slender Gun Drill

2021 ◽  
Author(s):  
Jiabin Liang ◽  
Li Jiao ◽  
Pei Yan ◽  
Minghui Cheng ◽  
Tianyang Qiu ◽  
...  
Keyword(s):  
Cutting Force ◽  
High Strength Steel ◽  
Fluid Pressure ◽  
Cutting Speed ◽  
High Strength ◽  
Feed Speed ◽  
Machining Parameters ◽  
Deep Hole ◽  
Machining Quality ◽  
Gun Drill

Abstract There are a lot of problems exist in the processing of long and thin deep hole gun drilling of high strength steel, such as insufficient of the machining mechanism and characteristics of gun drilling, difficulty in selecting machining parameters, unknown influence mechanism of machining parameters on drilling force, drilling temperature and machining quality. In this paper, 42CrMo high strength steel is selected as the workpiece material. A numerical model of cutting force is established based on the mechanism of gun drill, and then the finite element simulation and processing test are carried out. The results show that the cutting force decreases with the increase of cutting speed, and increases with the increase of feed speed; the error between the theoretical and actual value is less than 10%. Cutting speed and feed speed have a great influence on machining quality, and the cutting fluid pressure mainly affects the surface roughness.

Experimental Research on Ultrasonic Vibration Deep Hole Honing of Titanium Alloy

2011 ◽  
Vol 314-316 ◽  
pp. 1107-1111
Author(s):  
Hong Bing Zhao ◽  
Ying Fei Nan
Keyword(s):  
Surface Roughness ◽  
Titanium Alloy ◽  
Ultrasonic Vibration ◽  
Experimental Research ◽  
High Surface ◽  
The Self ◽  
Deep Hole ◽  
High Surface Roughness ◽  
Low Efficiency ◽  
Better Than

Deep hole honing is the primary way of finishing, the main problems existing now are the low efficiency, high surface roughness, especially in the processing of difficult to cut materials. In this study, the test is on the titanium alloy and uses the self-developed ultrasonic vibration honing equipment. The results show that in the same conditions, the ultrasonic vibration in deep-hole honing can improve the efficiency about 1 times, and meanwhile the surface roughness can reach below 0.8μm, the oilstone is uneasy to block, and the technical effects are better than traditional honing process.

Experimental Study on Ultrasonic Vibration Drilling of Stainless Steel 0Cr17Ni4Cu4Nb Micro-Deep-Hole

2014 ◽  
Vol 692 ◽  
pp. 381-386
Author(s):  
Zhan Feng Liu ◽  
Tao Guo
Keyword(s):  
Stainless Steel ◽  
Ultrasonic Vibration ◽  
Chip Morphology ◽  
Hole Drilling ◽  
Deep Hole ◽  
Basic Principles ◽  
Deep Hole Drilling ◽  
The Common ◽  
Vibration Drilling ◽  
Exit Burr

Through the analysis of the basic principles of vibration drilling, using the ultrasonic vibration drilling device to carry out the stainless steel 0Cr17Ni4Cu4Nb micro-deep-hole drilling test, and comparison between the common drilling and the ultrasonic vibration drilling in the exit burr, chip morphology, and surface roughness. The result fully reflects the superiority of the ultrasonic vibration drilling, and it has a dramatic effect of technology than the common drilling. A new method was afforded for stainless steel 0Cr17Ni4Cu4Nb micro-deep-hole drilling.

Study on the Effect of Vibration Amplitude in Two-Dimension Ultrasonic Vibration Cutting

2014 ◽  
Vol 1027 ◽  
pp. 131-135
Author(s):  
Ying Niu ◽  
Feng Jiao ◽  
Jie Li ◽  
Jia Fei Zhang
Keyword(s):  
Cutting Force ◽  
Ultrasonic Vibration ◽  
Two Dimensional ◽  
Bending Vibration ◽  
Vibration Cutting ◽  
Machining Quality ◽  
Hard And Brittle Materials ◽  
Longitudinal Bending ◽  
Ultrasonic Vibration Cutting

Longitudinal-bending complex vibration can be realized by opening chute on the amplitude amplifier pole. Different longitudinal and bending amplitudes can be obtained under different angles and the number of the chutes. Based on the theory of two-dimensional ultrasonic cutting, the effects of the two dimensional amplitude on the cutting characteristics were analyzed experimentally in the paper. Research results show that the amplitudes of longitudinal and bending vibration have a great effect on cutting force and machining quality in two-dimensional ultrasonic vibration cutting of hard and brittle materials. When keeping constant longitudinal amplitude and increasing bending amplitude in a certain extent, the cutting force could be reduced and the machining quality of workpiece could be improved effectively. The research provides relevant basis for designing two-dimensional longitudinal bending vibration cutting system.

Development of Ultrasonic Vibration Assisted Micro Electrochemical Discharge Machining Tool

2019 ◽  
Vol 12 (4) ◽  
pp. 313-325
Author(s):  
Xiaokun Li ◽  
Yuankai Ren ◽  
Zhiyuan Wei ◽  
Yong Liu
Keyword(s):  
Machine Tool ◽  
Surface Quality ◽  
Ultrasonic Vibration ◽  
Brittle Materials ◽  
Geometric Accuracy ◽  
Machining Performance ◽  
Machining Quality ◽  
Electrochemical Discharge Machining ◽  
Electrochemical Discharge ◽  
Hard And Brittle Materials

Background: The fabrication of microstructures with high machining quality is always difficult when it is concerned with non-conductive hard and brittle materials such as glass and engineering ceramics. It is reported in related papers and patents that Electrochemical Discharge Machining (ECDM) process is a good choice for machining non-conductive, hard and brittle materials. However, the machining performance of ECDM process, especially in the aspect of geometric accuracy and surface quality, needs to be greatly improved. Objective: The purpose of this study was to improve the machining quality of conventional ECDM process by introducing ultrasonic vibration to ECDM process, develop an Ultrasonic Vibration Assisted Micro Electrochemical Discharge Machining (UAECDM) tool, and investigate the improvements of the machining performance by means of comparative experiments. Methods: Firstly, the machining principle of UAECDM was investigated, and the effects of ultrasonic vibration are discussed with the analysis of the micro process. Secondly, the hardware system, which consists of a machine tool body, XY and Z axes, an ultrasonic spindle system and motion control system, was established; and the software system was developed based on the analysis of the overall workflow of the machining process. Finally, comparative experiments, including ECDM drilling, UAECDM drilling, ECDM milling and UAECDM milling, were carried out to reveal the improvements of the machining quality. Results: In the UAECDM group, a micro-hole with the inlet diameter of 133.2µm as well as the 3 × 3 array of micro holes was fabricated on the glass workpiece with 300µm thickness, and a microgroove with the width of 119.2µm was successfully milled on the glass workpiece. It is shown in both microscopic photographs and optical measurements that the microstructures fabricated by UAECDM have better machining quality compared with similar microstructures fabricated by ECDM. Conclusion: Based on comparative experiments and discussions of the results, it has been proved that the machine tool can meet the requirement of the ultrasonic vibration-assisted micro electrochemical discharge machining and can improve the geometric accuracy and surface quality significantly.

Experimental Research on the Vibration Characteristics of Flexural Vibration Disk

2010 ◽  
Vol 97-101 ◽  
pp. 2558-2561
Author(s):  
Lin Zhu ◽  
Ji Yun Li
Keyword(s):  
Resonant Frequency ◽  
Ultrasonic Vibration ◽  
Reference Value ◽  
Flexural Vibration ◽  
Structure Design ◽  
Vibration Characteristics ◽  
Deep Hole ◽  
Vibration System ◽  
Maximal Amplitude ◽  
Threaded Connection

The vibration characteristics of flexural vibration disk in ultrasonic vibration system are studied through experiments. The results show that the resonant frequency of flexural vibration disk reduces with the reducing of its thickness and the resonant frequency increases with the reducing of its diameter. When designing the ultrasonic vibration system, because the transformer horn and the flexural vibration disk are designedly integrated, the defects caused by the way of threaded connection can be avoided. It is found that flexural vibration is dominating in the disk with some reflected ultrasonic through experiments, at the same time, there exist amplifying characteristics in the vibration of the disk and the maximal amplitude can reach 18 μm. The corresponding results provide certain reference value for the structure design of ultrasonic vibration system and the application in ultrasonic vibration deep-hole honing.

Research on Ultrasonic-Assisted Fixed-Abrasive Lapping Technology for Engineering Ceramics Cylindrical Part

2017 ◽  
Vol 5 (2) ◽  
Author(s):  
Feng Jiao ◽  
Bo Zhao
Keyword(s):  
Ultrasonic Vibration ◽  
Material Removal ◽  
High Efficiency ◽  
Removal Rate ◽  
Tangential Force ◽  
Cylindrical Part ◽  
Engineering Ceramics ◽  
Machining Quality ◽  
Ultrasonic Assisted ◽  
Fixed Abrasive

Lapping is a key processing step for precision parts, which directly affects machining quality, precision, and efficiency. Due to some drawbacks of free-abrasive lapping such as deep scratches on the lapped surface, lower lapping efficiency for lower lapping speed, severe waste of abrasive, high-processing cost, and so on, conventional fixed-abrasive lapping (CFL) technology was proposed and developed recently. Meanwhile, considering the unique advantages of the ultrasonic-assisted machining during the processing of those hard and brittle materials and the effect of ultrasonic vibration on the self-sharpening characteristic of abrasive pellet, a novel ultrasonic-assisted fixed-abrasive lapping (UAFL) technology is put forward and corresponding lapping device for engineering ceramics cylindrical part is developed in this paper. Meanwhile, UAFL mechanism and characteristics were studied theoretically and experimentally. Research results show that superimposed ultrasonic vibration changes the lapping movement characteristics and material removal mechanism to a certain extent, helping to heighten material removal rate, smoothen the waveform of tangential force, reduce the average tangential force, and improve surface machining quality. UAFL can be regarded as a high efficiency and precision processing technology for engineering ceramics cylindrical part.

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