Effect of convex surface splicing characteristics of mold on the machining error in milling process

2022 ◽  
Author(s):  
Dongkai Jia ◽  
Shi Wu ◽  
Chunfeng Wang ◽  
Xianli Liu
Keyword(s):  
Convex Surface ◽  
Milling Process ◽  
Machining Error

Machining Error and Milling Process Control Methods for Joint Surface of Machine Tool

2014 ◽  
Vol 800-801 ◽  
pp. 666-671
Author(s):  
Bin Jiang ◽  
Kai Zhang ◽  
Lin Yang ◽  
Ming Hui Zhang ◽  
Sheng Jie Wang
Keyword(s):  
Process Control ◽  
Machine Tool ◽  
Cutting Parameters ◽  
Maximum Error ◽  
Milling Process ◽  
Joint Surface ◽  
Control Methods ◽  
Machining Error ◽  
Error Matrix ◽  
Processing Error

The existing processes of controlling machining error just controlled the maximum error. However, it did not effectively control the distribution of the error.The reliability of the assembly precision of the key joint surface did not meet the requirements, thereby affecting the service performance of machine tool. To solve this problem, the error matrix and transformation matrix was used to ascertain the location of joint surface positioning error occurred. The influence of processing error on the the positioning accuracy of machine tool was analyzed. The control objective of milling process was proposed. At the same time, the effects of cutting parameters on the processing error were also studied according to the milling experiments. The process error and its distribution characteristics of joint surface were obtained by analyzing the relationship between deformation of joint surface and cutting parameters. The milling process control methods were proposed.

scholarly journals An approach to real-time compensation of machining error using deflection of tool estimated from cutting forces in end-milling process

2016 ◽  
Vol 10 (2) ◽  
pp. JAMDSM0022-JAMDSM0022 ◽  
Author(s):  
Kenji SHIMANA ◽  
Eiji KONDO ◽  
Hiroko KARASHIMA ◽  
Mitsuhiro NAKAO ◽  
Shunichi YAMASHITA
Keyword(s):  
Real Time ◽  
Cutting Forces ◽  
End Milling ◽  
Milling Process ◽  
Machining Error ◽  
End Milling Process

Innovated Precision Grinding by Exploiting Grinding Point Movement in Radial Direction and Forward Backward Feeding of Wheel

2007 ◽  
Vol 329 ◽  
pp. 63-68 ◽  
Author(s):  
Bin Yao ◽  
W.M. Xi ◽  
C.R. Chen ◽  
L. Shi
Keyword(s):  
Life Span ◽  
Radial Direction ◽  
Convex Surface ◽  
Calculation Model ◽  
Grinding Wheel ◽  
Precision Grinding ◽  
Machining Error ◽  
Hard Materials ◽  
Machining System ◽  
Grinding Technique

A novel precision grinding technique optimum is proposed for grinding workpiece’s convex surface. The grinding point moves in radial direction on wheel’s planar face, while the grinding wheel feed in forward and backward direction. The calculation model of cutting location is established, experiments and data are shown. The advantages are illustrated by achieved higher precision grinding, extended life span of wheel, reduced deformation of machining system, and easier dressed following dullness. Via comparing the machining error to conventional methods, it is suggested that technique is an optimum option, in particular, for grinding convex surface of workpiece made of brittle and hard materials.

Dependence of the joint configuration on the dynamic immobility fulcrum

2019 ◽  
pp. 108-114
Author(s):  
A. D. Kozlov ◽  
Yu. P. Potekhina
Keyword(s):  
Kinetic Energy ◽  
Convex Surface ◽  
The Other ◽  
Concave Surface ◽  
Joint Configuration ◽  
Articular Surfaces

Although joints with synovial cavities and articular surfaces are very variable, they all have one common peculiarity. In most cases, one of the articular surfaces is concave, whereas the other one is convex. During the formation of a joint, the epiphysis, which has less kinetic energy during the movements in the joint, forms a convex surface, whereas large kinetic energy forms the epiphysis with a concave surface. Basing on this concept, the analysis of the structure of the joints, allows to determine forces involved into their formation, and to identify the general patterns of the formation of the skeleton.

Study of The Pharmacological Activity and Heavy Metal Content of Eichhornia Crassipes Extract

2019 ◽  
Vol 2 (2) ◽  
pp. 91-95 ◽  
Author(s):  
Jimmy Jimmy ◽  
Diah Indriani Widiputri ◽  
Paulus Gunawan
Keyword(s):  
Heavy Metal ◽  
Pharmacological Activity ◽  
Water Hyacinth ◽  
Metal Content ◽  
Eichhornia Crassipes ◽  
High Light Intensity ◽  
Milling Process ◽  
Heavy Metal Content ◽  
Solvent Ratio ◽  
Negative Impacts

Eichhornia crassipes is well-known as water hyacinth. Water hyacinth grows rapidly in the nutrient-rich water and high light intensity places. The uncontrollable growth of water hyacinth has caused many negative impacts to the environment. For instance, interrupted water transport and decreased population of aquatic lives. The capacity of utilising water hyacinth is slower than water hyacinth growth and water hyacinth is still considered as a threat to theecosystem. This work was focused on the study of the pharmacological activity and heavy metal content of water hyacinth in Lake Cipondoh, Tangerang. Fresh water hyacinth was pre-treated through oven-drying and milling process. After that, each part of the plant was macerated by using multiple extraction method with 96% ethanol/water and three variations of sample-to-solvent ratios (1:30, 1:50, and 1:75 w/v). The result of the experiment showed thatwater hyacinth leaves produced an extract with lowest IC 50 (55.76 ± 6.73 ppm) compared toother parts. The most optimum solvent used to achieve this result was 96% ethanol/water (1:1 v/v). In order to obtain the lowest antioxidant activity, the sample to solvent ratio used was 1:50 and the heavy metal in the extract was very low. With this result, it was concluded that there is a promising opportunity to apply the water hyacinth growing in Lake Cipondoh, Tangerang as herbal medicine ingredient. Through this utilization, the overall number of water hyacinth in Indonesia can be reduced or at the least be controlled, so that the environmental problem caused by this plant can be minimized.

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