Cutting temperature in intermittent cutting

1987 ◽  
Vol 27 (2) ◽  
pp. 261-274 ◽  
Author(s):  
Z. Pálmai
Keyword(s):  
Cutting Temperature ◽  
Intermittent Cutting

scholarly journals Effects of Cutting Conditions and Cold Air on Cutting Temperature in Intermittent Cutting

2002 ◽  
Vol 2002.77 (0) ◽  
pp. _3-21_-_3-22_
Author(s):  
Toshiroh SHIBASAKA ◽  
Tsuyoshi TANABE ◽  
Hisashi HAYASHI ◽  
Toshimichi MORIWAKI
Keyword(s):  
Cutting Temperature ◽  
Cutting Conditions ◽  
Cold Air ◽  
Intermittent Cutting

Modeling and experimental study of temperature distributions in end milling Ti6Al4V with solid carbide tool

2016 ◽  
Vol 231 (2) ◽  
pp. 217-227 ◽  
Author(s):  
Yujing Sun ◽  
Jie Sun ◽  
Jianfeng Li
Keyword(s):  
Experimental Study ◽  
Heat Dissipation ◽  
End Milling ◽  
Cutting Temperature ◽  
Chip Thickness ◽  
Milling Process ◽  
Machining Process ◽  
Temperature Distributions ◽  
Solid Carbide ◽  
Intermittent Cutting

The objective of this study is to model the temperature distributions in milling analytically. In this article, previous research on heat generation and heat dissipation in the machining process was reviewed and then the temperature model in intermittent cutting with continuously varying chip thickness was established. The experimental study to measure cutting temperature in milling Ti6Al4V utilizing semi-artificial thermocouple was presented. The predicted and experimental results for milling process were presented and compared. The results showed that the proposed mathematical model could predict cutting temperature with high accuracy.

scholarly journals Restraint of Thermal Crack on Rake Face of Cermet Tool in Intermittent Cutting

2013 ◽  
Vol 7 (3) ◽  
pp. 263-269
Author(s):  
Akira Mizobuchi ◽  
◽  
Masahiro Masuda ◽  
Teruo Nogami ◽  
Hitoshi Ogawa ◽  
...  
Keyword(s):  
Feed Rate ◽  
Cutting Temperature ◽  
Good Effect ◽  
Rake Face ◽  
Thermal Crack ◽  
Machining Processes ◽  
Thermal Cracks ◽  
Micro Cracks ◽  
Machining Lines ◽  
Intermittent Cutting

Thermal cracks due to heating-cooling cycles in intermittent cutting in the machining processes of bearing production play an important role in tool life. This paper discusses restraint in the tool failure of TiC cermet used in actual machining line. The purpose of this study is to investigate two effects the appearance of the rake face and variation in the feed rate in thermal cracks on machining lines and to examine the thermal crack mechanism. As a result, we found that tools with some micro cracks were easily damaged. Removing some cracks on the rake face delays thermal crack generation time and reduces the number of cracks. Slightly decreasing the feed rate has a good effect on restraining the occurrence of cracks due to lowering of the cutting temperature.

Lubrication Effect of Smeared Oil on Workpiece Surface in Intermittent Cutting With Very Short Cutting Duration

2020 ◽  
Author(s):  
Yoshiki Nakamura ◽  
Fumihiro Itoigawa ◽  
Shinya Hayakawa ◽  
Satoru Maegawa ◽  
Xiaoxu Liu
Keyword(s):  
Cutting Force ◽  
Temperature Rise ◽  
High Speed ◽  
Metal Cutting ◽  
Cutting Temperature ◽  
Cutting Edge ◽  
Frictional Heat ◽  
Low Viscosity ◽  
Ti Alloys ◽  
Intermittent Cutting

Abstract In the metal cutting, generally, application of lubricant to a cutting edge is one of the methods in order to suppress temperature rise of the cutting edge by reducing frictional heat. However, the reduction in friction with lubricant disappears at higher temperature environment because of the loss of lubricant oiliness associated with temperature rise. Conversely, this reduction effect might work only in the initial stage immediately after cutting edge /work engagement because the temperature is not so high. Therefore, if the cutting duration of each blade of end-mill is shorten by limiting the cutting length per once, the cutting temperature can be suppressed to be lower than the moderate magnitude for lubrication. On the other hand, Ti-alloys with low thermal conductivity would experience quite high temperature increase during the high-speed cutting process. Therefore, it is thought that lubricant cannot be used properly with conventional cutting methods. In this study, the high-speed milling method mentioned above was used to implement the machining of Ti-alloys, and the lubricant effects of different types oils were compared from two aspects as tool wear and cutting force. As a result, when using low-viscosity synthetic ester oil, the damage to the cutting edge was suppressed most. At the same time, there was no fluctuation in cutting force by repeated machining. From this result, it was suggested that the lubricant performance, in intermittent cutting with very short cutting duration, depends on the heat resistance and permeability of the oil.

Equipment and materials for shock-intermittent cutting

2021 ◽  
pp. 71-79
Author(s):  
A.B. Istomin ◽  
V.B. Kozlov
Keyword(s):  
Cutting Temperature ◽  
Relative Length ◽  
Repeated Loading ◽  
Pulse Load ◽  
Impact Pulse ◽  
Thread Cutting ◽  
Processed Material ◽  
Steel Grades ◽  
The Impact ◽  
Intermittent Cutting

The article considers the shock-intermittent processing method, which is used for cutting blind threads M12x1.5 in nuts made of steel grade X18N9T. Compared to the conventional method, it allows increasing the processing productivity; the durability of the thread taps has increased to 300 holes (with manual thread cutting, the durability of the taps is 100 holes). The method allows mechanizing labor-intensive threading operations. The optimal conditions of processing by this method are determined based on ensuring sufficient strength of the cutting wedge of the tool under repeated loading and, at the same time, creating the most intense impact on the material of the cut layer of the workpiece. The destruction of the processed material on impact most easily occurs at critical deformation rates, which, for instance, equal 60 m/s for corrosion-resistant steel. This leads to an overestimation of the impact pulse values, and consequently, chipping of the cutting edges of the tool. Therefore, for these processing conditions, there is an optimal value of the pulse load transmitted by the spindle to the tool. For threads M10 and M12 with pitches of 1.25 and 1.5 in parts made of steel grades X18N10T, the best results are achieved at loads corresponding to the increment of the dynamic moment of the driven bushing with the tool. At high pulse loads, the durability of the working tool is sharply reduced, and at lower loads, the cutting performance is reduced. One of the positive features of shock-intermittent cutting is the presence of breaks that facilitate the operation of the cutting wedge due to the better penetration of the coolant. Therefore, shockintermittent cutting is carried out at more intensive modes than conventional continuous cutting. However, the tool life does not decrease as a result, but even increases. The relative length of the cutting area, determined by the angle, should be chosen based on the fact that the temperature in the cutting area does not have time to reach its steady value, equal to the cutting temperature during the normal long-duration cutting, carried out continuously.

Testing Aluminium Oxide based Ceramics at Irregular Interrupted Cut

2013 ◽  
Vol 10 (2) ◽  
pp. 26-28
Author(s):  
Ladislav Kyncl ◽  
Robert Cep ◽  
Pavel Novacek ◽  
Jiri Schreier
Keyword(s):  
Aluminium Oxide ◽  
Cutting Effect ◽  
Intermittent Cutting

Abstract This article discusses the test removable ceramic plates during machining with interrupted cut. Tests were performed on a lathe, which was clamped preparation which simulated us the interrupted cut. By changing the number plates mounted in a preparation it was a regular or irregular cut. When with four plates it was regular interrupted cut, the remaining three variants were already irregular cut. It was examined whether it will have the irregular intermittent cutting effect on the insert and possibly how it will change life of inserts during irregular interrupted cut.

Research on High-Speed Cutting of Cr12MoV Hardened Steel - A Review

2020 ◽  
Vol 15 ◽  
Author(s):  
Fei Sun ◽  
Guohe Li ◽  
Qi Zhang ◽  
Meng Liu
Keyword(s):  
High Speed ◽  
Cutting Temperature ◽  
High Hardness ◽  
High Strength ◽  
Hardened Steel ◽  
Parameters Optimization ◽  
Future Research ◽  
High Speed Machining ◽  
Machined Surface ◽  
Stamping Die

: Cr12MoV hardened steel is widely used in the manufacturing of stamping die because of its high strength, high hardness, and good wear resistance. As a kind of mainstream cutting technology, high-speed machining has been applied in the machining of Cr12MoV hardened steel. Based on the review of a large number of literature, the development of high-speed machining of Cr12MoV hardened steel was summarized, including the research status of the saw-tooth chip, cutting force, cutting temperature, tool wear, machined surface quality, and parameters optimization. The problems that exist in the current research were discussed and the directions of future research were pointed out. It can promote the development of high-speed machining of Cr12MoV hardened steel.

Research Status of Subsequent Machining of Laser Cladding Layers

2020 ◽  
Vol 15 ◽  
Author(s):  
Lei Li ◽  
Yujun Cai ◽  
Guohe Li ◽  
Meng Liu
Keyword(s):  
Tool Wear ◽  
Surface Quality ◽  
Laser Cladding ◽  
Wear Surface ◽  
Chip Formation ◽  
Cutting Temperature ◽  
Dimensional Accuracy ◽  
Cutting Parameters ◽  
Cladding Layer ◽  
Cladding Layers

Background: As an important method of remanufacturing, laser cladding can be used to obtain the parts with specific shapes by stacking materials layer by layer. The formation mechanism of laser cladding determines the “Staircase effect”, which makes the surface quality can hardly meet the dimensional accuracy of the parts. Therefore, the subsequent machining must be performed to improve the dimensional accuracy and surface quality of cladding parts. Methods: In this paper, chip formation, cutting force, cutting temperature, tool wear, surface quality, and optimization of cutting parameters in the subsequent cutting of laser cladding layer are analyzed. Scholars have expounded and studied these five aspects but the cutting mechanism of laser cladding need further research. Results: The characteristics of cladding layer are similar to that of difficult to machine materials, and the change of parameters has a significant impact on the cutting performance. Conclusion: The research status of subsequent machining of cladding layers is summarized, mainly from the aspects of chip formation, cutting force, cutting temperature, tool wear, surface quality, and cutting parameters optimization. Besides, the existing problems and further developments of subsequent machining of cladding layers are pointed out. The efforts are helpful to promote the development and application of laser cladding remanufacturing technology.

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