Continuous forming of height-variable profiles by flexible roller beading

2019 ◽  
Vol 103 (5-8) ◽  
pp. 2649-2663 ◽  
Author(s):  
Peter Groche ◽  
Martin Storbeck ◽  
Tianbo Wang
Keyword(s):  
Continuous Forming

Continuous forming of screw-ribbed insulators

1963 ◽  
Vol 20 (11) ◽  
pp. 609-611
Author(s):  
B. I. Gaidash
Keyword(s):  
Continuous Forming

Simulation of Temperature Field of Metal Thin Wall Parts during Laser Direct Deposition Rapid Prototyping

2011 ◽  
Vol 88-89 ◽  
pp. 42-45
Author(s):  
Wei Zhang ◽  
Shu Qin Shi
Keyword(s):  
Temperature Field ◽  
Element Model ◽  
Temperature Cycle ◽  
Thin Wall ◽  
Single Track ◽  
Heat Accumulation ◽  
Continuous Forming ◽  
Life And Death ◽  
Layer Deposition ◽  
Simulation And Experiment

The simulation of temperature field during laser direct metal deposition(DMD) were researched. The finite element model of single track cladding, multi-track overlapping and multi-layer deposition were established. The temperature field was simulated by ANSYS software basing on life-and-death element and cycle algorithm. Under different process parameters, the temperature and temperature gradient on the cross-section of sample were simulated during single- track scanning, multi-track overlapping and multi-layer deposition. Temperature cycle curves at different position were analyzed and were consistent with actually value. Both simulation and experiment showed that heat accumulation during continuous forming greatly affected the temperature of molten pool.

Metal Forming With Vibrated Tools

1969 ◽  
Vol 91 (4) ◽  
pp. 1168-1174 ◽  
Author(s):  
Ivan Kristoffy
Keyword(s):  
Metal Forming ◽  
Necessary Conditions ◽  
Force Measurement ◽  
Cold Forging ◽  
Dynamic Force ◽  
Forming Force ◽  
Continuous Forming ◽  
Tool Vibration ◽  
State Of Stress ◽  
Force Reduction

The results of superimposed 20- and 20,000-cps tool vibration in deep drawing, ironing, and cold-forging are presented. Equipment and instrumentation are discussed. The importance of proper dynamic force measurement is emphasized. It was found that: (a) punch vibration resulted in only an apparent force reduction proportional to the workpiece stiffness and vibration amplitude; (b) die vibration caused a true forming force reduction either by changing the direction of friction force or by altering the state of stress; (c) material properties were not affected, although in cold-forging, with superimposed 20,000 cps punch vibration, an apparent force drop of up to 60 percent was achieved; (d) surface finish and deep drawability of the material, under certain conditions, were slightly improved. It is recommended to use superimposed tool vibration only in continuous forming operations, and then only if certain necessary conditions can be satisfied.

scholarly journals Microstructural and mechanical studies of feedstock material in continuous extrusion process

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Tariku Desta ◽  
Devendra Kumar Sinha ◽  
Perumalla Janaki Ramulu ◽  
Habtamu Beri Tufa
Keyword(s):  
Yield Strength ◽  
Statistical Significance ◽  
Extrusion Process ◽  
Wheel Speed ◽  
Forming Process ◽  
Percentage Elongation ◽  
Continuous Forming ◽  
Before And After ◽  
Continuous Extrusion ◽  
Feedstock Material

AbstractThe challenge encountered in continuous forming process is the variation in mechanical strength of product formed with respect to process variables like extrusion wheel speed and diameter of product. In this research article, the micro-structural investigation of the aluminum (AA1100) feedstock material of 9.5-mm diameter has been carried out at various extrusion wheel speeds and diameter of product before and after deformation on commercial continuous extrusion setup TBJ350. The mechanical properties like yield strength as well as percentage elongation have been estimated and optimized using two variables with 3 levels through central composite rotatable design (CCRD) method. The mathematical modeling has been carried out to predict the optimum combination of process parameters for obtaining maximum value of yield strength and percentage elongation. The statistical significance of mathematical model is verified through analysis of variance (ANOVA). The optimum value of yield strength is found to be 70.939 MPa at wheel velocity of 8.63 rpm and product diameter of 9 mm respectively, whereas the maximum percentage elongation recorded is 46.457 at wheel velocity of 7.06 rpm and product diameter of 7.18 mm. The outcome may be useful in obtaining the best parametric combination of wheel speed and extrusion ratio for best strength of the product.

Effect of Accurate Dimension Part during Transfer Die Technology

2015 ◽  
Vol 1096 ◽  
pp. 381-386
Author(s):  
Sanya Kumjing
Keyword(s):  
Finite Element ◽  
High Precision ◽  
P Value ◽  
Forming Process ◽  
Continuous Forming ◽  
Significance Level ◽  
Forming Simulation ◽  
Statistical Confidence ◽  
Element Simulation ◽  
Thick Steel

This research aimed to apply the transfer die technology together with the forming simulation by using finite element method to assist the analysis and the design of a high-precision continuous forming die for the panel auto part forming, which was made from 1.4 mm thick steel JFS A3001. The outcome of the finite element simulation of a specimen could be applied in forming a specimen without any specimen damage. Therefore, the high-precision continuous forming die was designed based on the results and factors from the forming simulation. After the design, the high-precision continuous forming die was manufactured and the specimen stamping test was conducted to satisfy the customer’s specifications. The results from the testing shown that the specimens obtained from the forming process are similar to the sample provided from the customer. Only minor forming die modification was required. In addition, the results of specimens inspection according to the inspection location using measuring tools shown that the size and the circumference of the specimens were in an acceptable range with more than 0.05 significance level of P-value (P-Value >α) and 95% statistical confidence level. As a result, die manufacturers can effectively save time, reduce cost and minimize risk occurred from errors in the die manufacturing.

Principle Analysis of Profiled Bar Turning Peeling Machine

2013 ◽  
Vol 457-458 ◽  
pp. 486-489
Author(s):  
Hui Zhang ◽  
Yan Chen
Keyword(s):  
Regular Polygon ◽  
Speed Ratio ◽  
Continuous Forming ◽  
Form Complex ◽  
Cutting Machine ◽  
Rotary Cutting ◽  
Straightness Error ◽  
Bar Turning ◽  
Trajectory Equation ◽  
Feed Device

Through the study of regular polygon cross section continuous forming processing technology of rotary cutting machine, this article designed a profiled bar turning peeling machine. This machine is mainly composed of workpiece axis, cutter axis, feed device and pulling device, etc . Parallel mounted, workpiece axis and cutter axis rotate at a rotational speed ratio in the same direction so as to form complex turning motions, during which the cutting track of the knifepoint relative to workpiece axis forms a shape of approximate linear closed curve, at the same time, feed device and pulling device pull workpiece moving along the axis, through which this machine can complete a turning finish of a whole workpiece at a time. This article analyzed the turning peeling principle of profiled bar, established a motion trajectory equation for the knifepoint relative to the workpiece axis, analyzed the processing straightness error of turned profiled bar, and then derived the error calculation formula.

Sign in / Sign up

Export Citation Format

Share Document