Stamping Die Design of a Kind of Textile Machine Needle

2013 ◽  
Vol 446-447 ◽  
pp. 650-654
Author(s):  
Xin Ping Hu ◽  
Guan Ying Wang
Keyword(s):  
Mass Production ◽  
Technological Property ◽  
Cutting Edge ◽  
Die Design ◽  
Dimensional Tolerance ◽  
Stamping Die ◽  
Textile Machine ◽  
Discharge Unit ◽  
Die Set

This paper introduces a stamping die design of a kind of textile machine needle. According to the size,material and mass production requirements of needle, the blanking technological property of parts are analyzed, and its general principles, methods and steps of die design are introduced. The structure of stamping die is gap-frame press, and JB23-25 is selected to do the work. The dimensions of cutting edge and dimensional tolerance are calculated. Finally designing components, checking stamping equipment and drawing assembly diagram are finished. This stamping die is mainly composed by punch die and concave die, positioning parts, discharge unit, die set, stamping machine and fasteners.

Dry Progressive Stamping of Copper-Alloy Snaps by the Plasma Nitrided Punches

2018 ◽  
Vol 920 ◽  
pp. 28-33 ◽  
Author(s):  
Tatsuhiko Aizawa ◽  
Hiroshi Morita
Keyword(s):  
Low Temperature ◽  
Plasma Nitriding ◽  
Life Time ◽  
Ceramic Coatings ◽  
Low Temperature Plasma ◽  
Micro Structure ◽  
Temperature Plasma ◽  
Stamping Die ◽  
Wear And Friction ◽  
Die Set

The dry progressive stamping was strongly required to make mass production of clothing parts and beverage cans. The duplex coating was one of the most reliable means to protect the dies and punches from wear and friction and to prolong their life time. In this coating, the die and punch was first surface-treated to have sufficient hardness in compatible to the hard ceramic coatings. In the present study, the low temperature plasma nitriding at 673 K was employed to harden the six kinds of punches and dies for progressive stamping of copper alloyed fucks. The micro-structure and nitrogen mapping were investigated by SEM with EDS to demonstrate that the hardening took place by nitrogen super saturation into SKD11 matrix without nitride precipitations. These nitrogen super-saturated punches and dies were fix into the progressive die set for dry stamping. No significant wear of tools as well as reduction of stamping loads even after a million shots proved that the low temperature plasma nitriding should be suitable to make hardening of dry stamping die substrates even without use of hard ceramic coatings.

Geometric compensation for automotive stamping die design integrating structure deflection and blank thinning

2012 ◽  
Vol 66 (9-12) ◽  
pp. 1449-1456 ◽  
Author(s):  
Jun Chen ◽  
Dongkai Xu ◽  
Guodong Xia ◽  
Xifeng Li ◽  
Jieshi Chen ◽  
...  
Keyword(s):  
Die Design ◽  
Stamping Die

Indexing and Retrieval in Metal Stamping Die Design Using Case-based Reasoning

2003 ◽  
Vol 3 (4) ◽  
pp. 353-362 ◽  
Author(s):  
S. B. Tor ◽  
G. A. Britton , and ◽  
W. Y. Zhang
Keyword(s):  
Search Space ◽  
Die Design ◽  
Graph Representation ◽  
Case Based Reasoning ◽  
Stamping Die ◽  
Indexing And Retrieval ◽  
Metal Stamping ◽  
High Level ◽  
Relation Graph ◽  
Case Based

This paper presents a case-based reasoning (CBR) methodology for metal stamping die design, that in particular addresses the indexing and retrieval of die design cases. A feature relation graph representation of stamped metal parts are used to create a high level of geometric abstraction, which is used to index design cases quickly and accurately. Though the potential search space for case retrieval is huge, by employing a novel dual-step similarity analysis between a new stamped part and existing parts in the case library, the proposed retrieval strategy can narrow down the search space efficiently and retrieve the most similar case in a reasonable period of time. An illustrative example is included to demonstrate the operation of the proposed approach and show its effectiveness in speeding up stamping die design.

Remedies for Cutting Edge Failure of Carbide Hob Due to Chip Crush: Some Results of Evaluation by This Method in Automotive Industry

2003 ◽  
Author(s):  
Masaharu Komori ◽  
Masaoki Sumi ◽  
Aizoh Kubo
Keyword(s):  
Automotive Industry ◽  
Mass Production ◽  
Simulation Method ◽  
Cutting Edge ◽  
Manufacturing Cost ◽  
Single Edge ◽  
Edge Failure ◽  
Tooth Flank ◽  
Dry Hobbing

Dry hobbing, for friendliness on the environment, for increasing productivity and for decreasing manufacturing cost, often suffers failure of cutting edge of hob or problems about the surface quality of tooth flank of manufactured gear. In the previous report, a simulation method to calculate the clearance between cutting edge of hob and tooth flank of work gear during hobbing process is developed. In this report, this simulation is applied to some practical industrial problems of dry hobbing, i.e. chipping failure of cutting edge of carbide hob and bad coarse scratched surface finish of hobbed tooth flank of manufactured gears, perhaps due to chip crush. The simulation explains the mechanism of such actual failures in detail. On this fact, the “Distance of Single Edge Cutting” of a hob tooth is proposed to be an index of pinching and crushing of chips that could intrude into the clearance between hob cutting edge and tooth flank of work gear. Influencing factors on it are investigated and the bases for finding countermeasures are shown. This method has been applied to some practical cases of problem in mass-production of automotive gears, and good result was confirmed.

scholarly journals An Optimization of the New Die Design of Sheet Hydroforming by Taguchi Method

2011 ◽  
Vol 337 ◽  
pp. 294-299
Author(s):  
Morteza Hosseinzadeh ◽  
S. Ali Zamani ◽  
Ali Taheri
Keyword(s):  
Taguchi Method ◽  
Optimal Combination ◽  
Die Design ◽  
Effective Parameters ◽  
Taguchi Optimization ◽  
Sheet Hydroforming ◽  
Confirmation Test ◽  
Die Set ◽  
Hydroforming Process ◽  
Optimization Methodology

During the last few years, several sheet hydroforming processes have been introduced. Despite the advantages of these methods, they have some limitations. Of the processes, the two main ones are the standard hydroforming and hydromechanical deep drawing. A new sheet hydroforming die set was proposed that has the advantages of both processes and eliminates their limitations. In this method, a polyurethane plate was used as a part of the die-set to control the blank holder force. This paper outlines the Taguchi optimization methodology, which is applied to optimize the effective parameters in forming cylindrical cups by the new die set of sheet hydroforming process. The process parameters evaluated in this research are polyurethane hardness, polyurethane thickness, forming pressure path and polyurethane hole diameter. The design of experiments based upon L9 orthogonal arrays by Taguchi was used and analysis of variance (ANOVA) was employed to analyze the effect of these parameters on the forming pressure. The analysis of the results showed that the optimal combination for low forming pressure is harder polyurethane, bigger diameter of polyurethane hole and thinner polyurethane. Finally, the confirmation test was derived based on the optimal combination of parameters and it was shown that the Taguchi method is suitable to examine the optimization process.

Square Tube Manufacturing by forward Extrusion of AA7075 with Porthole Die

2012 ◽  
Vol 579 ◽  
pp. 92-100 ◽  
Author(s):  
Quang Cherng Hsu ◽  
Kun Hong Kuo ◽  
Ping Hsun Tsai
Keyword(s):  
High Strength ◽  
Die Design ◽  
Extrusion Force ◽  
Billet Temperature ◽  
Forward Extrusion ◽  
Die Stress ◽  
Die Set ◽  
Ram Speed ◽  
The One ◽  
Welding Pressure

The proposed paper aims at the development of extruding seam square tube of AA7075 high strength aluminum alloy by simulation and experiment. There are several factors related to extrusion load such as billet temperature, billet dimension, flow stress, die cavity and product geometry. The extrusion loads and die stresses for hot extruding square tube with respect to different product have been investigated. Since AA7075 behaves high forming resistance comparing to AA6063 and AA6061, the product design and die design should be modified in order to meet with the limitation of extrusion machinery. Moreover, AA7075 has high thermal welding crack behavior by comparing to AA7003. Therefore, In order to provide high contact pressure enough to conduct solid welding for the split AA7075 materials in welding chamber, the specific die cavity design has been finished. Then, the solid welding pressure can be increased. The research results show that under the same forming conditions such as fixed ram speed and billet temperature, the extrusion force for the product with thick thickness is small than the one with thin thickness. The same result was obtained for die stress. A square tube extrusion experiment has been conducted by installing die set into forward extrusion machinery. The experiment and simulation results have been compared and discussed.

Fatigue Analysis of Stripper Bolt Under Combined Loading for Improvement of Stamping Die Design

1986 ◽  
Vol 108 (2) ◽  
pp. 222-229
Author(s):  
Sang Hoon Lee
Keyword(s):  
Fatigue Life ◽  
Stress Concentration ◽  
Impact Load ◽  
Rectangular Pulse ◽  
Die Design ◽  
Combined Loading ◽  
Element Analysis ◽  
Mass System ◽  
Stamping Die ◽  
Stamping Dies

A common problem of fatigue failure of stamping dies was experienced during the stamping operation with socket-head screws. In order to establish a design standard for the stripper bolt, a methodology for determination of the loads and the fatigue strength of the stripper bolt was developed. Stresses due to an impulsive load and a rectangular pulse were calculated based on a simplified spring mass system and the appropriate corrections were made to elaborate the solution. This approximate solution was validated by a finite element analysis. The stripper bolt should have an infinite fatigue life to survive a half million stamping operations. The fatigue problem involves a stress concentration with combined mean and alternating stresses. The Gerber parabola and the residual stress method were employed to treat the combined loading and the stress concentration. In order to enhance the fatigue life of the stripper bolt, a cushion is introduced at the surface where an impact load is applied. The cushion is found very effective in improving the fatigue life of the stripper bolt. An interactive computer program was developed as a tool for designing stamping dies.

Die Design and Blanking Analysis

2003 ◽  
Author(s):  
Mary E. Hall ◽  
Mike Long ◽  
Sean D. Rhattigan ◽  
Elvin B. Shields
Keyword(s):  
Die Design ◽  
Lateral Movement ◽  
Fine Blanking ◽  
Trade Off ◽  
Modified Method ◽  
Counter Pressure ◽  
The Press ◽  
Die Set ◽  
The Subject ◽  
The Difference

The modified fine blanking technique is the subject of this research, along with a comparison of conventional blanking and shaving. The modified process does not require the use of a triple-action press and the press can be run at the same rate as conventional blanking. A counter-pressure punch and assembly are used to prevent the fracturing of the cut, which is similar to standard fine blanking. The difference between the two fine blanking techniques is that the modified method does not hold the material from lateral movement during the perforating operation. Furthermore, to achieve an optimum comparison of all three methods (conventional blanking, shaving, and modified fine blanking), a die set was designed that could produce parts for each of these processes. The evaluation of each method was done by cutting similar samples of each method and placing them in plastic, which allowed microscopic comparisons to be made of the three methods. A trade-off analysis of the various methods demonstrated that the modified fine blanking technique is superior to the other techniques.

Stamping die design based on numerical simulation and knowledge systematization

1999 ◽  
Vol 12 (5) ◽  
pp. 427-438 ◽  
Author(s):  
A. Hernandez ◽  
J. Vallejo ◽  
J. Canales ◽  
J. Albizuri
Keyword(s):  
Numerical Simulation ◽  
Die Design ◽  
Stamping Die
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