• 제목/요약/키워드: finishing process

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High Efficient Finishing Process for Press Dies by Cast Iron Bonded Diamond Pellet (1) (주철본드 다이아몬드 팰렛에 의한 프레스 금형의 고능률 연마가공 (1))

  • Hwang, Chan-Hae;Yoo, Kee-Tae;Jeong, Hae-Do;Ahn, Dae-Kyun
    • Journal of the Korean Society for Precision Engineering
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    • v.16 no.3 s.96
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    • pp.84-90
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    • 1999
  • The finishing process for dies and molds is directly related to finished surface quality, but many parts of process depend on human labor which needs much time and value. So automatic finishing machine has been produced for dies and molds, and applied widely for finishing process. Conventionally finishing machine has applied resin bonded finishing pad as a tool, but the removal ability of pad decreases greatly as finishing process goes on. In the finishing mechanism for dies and molds, finishing process is affected severely by cutting process, so can be divided into removing cusp and smoothing surface process. So, this study investigated the application of cast iron bonded diamond pellet for press dies, which is considered to have better characteristics than the other metal bonded pellets. The finishing characteristics were compared the between finishing pellet and pad. And finishing performance was appraised as the several cutting surfaces.

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Improvement of Form Accuracy in Curved Dies and Molds Using Compensation of Finishing Tool (연마 공구의 압력 보정에 의한 곡면 금형의 형상 정밀도 향상)

  • 임동재;정해도;안중환;안대균
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2000.05a
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    • pp.866-869
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    • 2000
  • The finishing process for die is an important process because it has influence on final quality of products. And it is difficult to automatize finishing process so that the process has depended on expert's skill until now. However, recently a study on development of die automatic finishing machine has been progressed, and actually this machine is applied to fabrication of die. But die automatic finishing machine has the problems such as low supply rate and high machine price. In this paper 3-axis machine was applied to the die finishing. And to improve form accuracy of die finishing path was regenerated. The finishing path considered tilting of finishing tool. and variation of machining force with contacting point between finishing and workpiece.

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Development of Magnetic Abrasive Jet Machining System for Precision Internal Polishing of Circular Tubes (원형관의 내면정밀가공용 순환식 자기입자분사가공 시스템 개발)

  • 강윤희
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 1995.10a
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    • pp.24-29
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    • 1995
  • A recently developed finishing process using rotating magnetic field is known to be very efficient for the finishing of parts such as vacuum tube, sanitary tube, etc., which are difficult to be finished by the conventional finishing methods as they are generally curbed tubes. But, the finishing system using rotating magnetic field have the defect that is the cross section of workpiece only circle because of internal rotating tool. Therefore, new finishing process of the workpieces which cross section are not circle is important and required. magnetic abrasive jet machining is a new concept finishing process. It is the precision internal finishing method using working fluid mixed with magnetic abrasives, which is jetted into the internal surface of tube. And magnetic poles are equipped on external surface of tube. In this study new concept finishing process or, magnetic abrasive jet machining system was developed. machining condition was predicted using simulation and some characteristics of the finishing process was analyzed.

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A Study on Improvement of Finishing Accuracy Using 3-Axis Machine for Curved Surface Dies (3축 가공기를 이용한 곡면 금형의 연마 정밀도 향상에 관한 연구)

  • Lim, Dong-Jae;Lee, Sang-Jik;Jeong, Hae-Do
    • Journal of the Korean Society for Precision Engineering
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    • v.18 no.3
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    • pp.61-67
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    • 2001
  • The finishing process for die is an important process because it has influence on final quality of products. Recently s study on development of 5-axis die automated finishing machine has been progressed. But die must be moved from the cutting machine to the die automated finishing machine. So manufacturing cost and time increase and machining error occurs by transfer. So, in this study, a 3-axis machining center was applied to die finishing. Because cutting tool can be changed to finishing tool by ATC, both of cutting and finishing process are possible on the machine. However, this application results in the decrease of finishing for the improvement of form accuracy. So this study focused on the generation of finishing tool path suitable to 3-axis die finishing for the improvement of form accuracy. The form accuracy evaluation is performed by the measurement of removal depth using a stylus profilometer. From the result, it is confirmed that form accuracy was improved less than 2$\mu$m of removal depth error.

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Effect of DP Finishing Conditions on the Mechanical Properties and Hand of Cotton Fabrics (DP 가공조건이 면직물의 역학적 성질과 태에 미치는 영향)

  • 신윤숙
    • Journal of the Korean Society of Clothing and Textiles
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    • v.24 no.3
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    • pp.440-447
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    • 2000
  • The effects of DP finishing conditions including process technique and finishing agent on the mechanical properties and hand of cotton fabrics were investigated. 100% cotton fabrics were treated with NMA/DMDHEU and NMA/YF using wet-fixation and steam-fixation process. For comparison, conventional pad-dry-cure process was used with DMDHEU. After DP finishing, tensile and compressional resilience increased and bending hysteresis decreased, resulting in the improvement of dimensional stability of cotton fabric. WF and SF process rendered fabrics better shear properties, tensile energy, and compressional linearity and energy than PDC process. However, SF process produced fabrics with higher geometrical roughness than WF process. After DP finishing, primary hand values except Koshi increased, resulting in the increase of total hand value of cotton fabric.

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ANALYSIS AND IMPROVEMENT OF FINISHING WORK PROCESS FOR COST MANAGEMENT (FOCUSED ON INDOOR FINISHING WORK OF APARTMENT)

  • Hoon-Ku Lee;Yoon-sun Lee;Ja-Young Yoon;Jae-Jun Kim
    • International conference on construction engineering and project management
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    • 2007.03a
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    • pp.711-720
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    • 2007
  • Apartment housing in the Korean domestic construction industry has had various and high-quality finishing work since the enforcement of price deregulation in 1998. Before the enforcement of price deregulation, feasibility studies of housing projects have not had particular difficulties as uniform description of finishing work items were reflected and finishing work cost also was equalized. However, the recent distinction of finishing work based on the same floor plan brings about project cost variation, along with many effects on construction management due to project cost increment. Accordingly, this paper suggests the improved plan of cost management to control the feasibility study result consistently during the life cycle of a project through an analysis based on cost management phase due to cost blackout, appearing at the commencement of a project, cost gradation caused by high-quality finishing work item, and cost reduction due to the degradation of finishing work after analysis of current apartment construction process focused on finishing work using the IDEF process analysis technique.

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Improving the Color Fastness of the Madder Extract on Tencel Nonwoven (인도 꼭두서니로 염색한 텐셀 부직포의 염색 견뢰도 향상에 관한 연구)

  • Lee, Bum Hoon
    • Textile Coloration and Finishing
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    • v.31 no.4
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    • pp.241-248
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    • 2019
  • In this study, improving the wash and rubbing fastness of a natural coloring matter from Madder extract dyed on Tencel nonwoven. The cationic finishing agent(RBP), nonionic finishing agent(HPX) and mordant(PAW) were used to improving the color fastness. The two types(exhaustion and pad-dry-cure) finishing process were investigated with various finishing agent concentration. The color strength, wash and rubbing fastness of Tencel nonwoven dyed with Madder extract have been evaluated by various dye concentration and finishing agent. The exhaustion process treated with the cationic finishing agent(RBP) was effective to improving washing and rubbing fastness.

Development of PET Flame Retardant Sheets for Industrial Materials by Control of Manufacturing Process (제조공정제어에 의한 친환경 고성능 산업용 PET 난연시트 제조기술의 개발)

  • Kim, Hea-In;Hong, Yo-Han;Park, Soo-Min
    • Textile Coloration and Finishing
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    • v.21 no.4
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    • pp.46-56
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    • 2009
  • In order to establish the standard manufacturing condition of PET flame retardant sheets, physicochetnical properties of the samples made by the conventional flame-retardant finishing were systematically investigated, including compatibility among flame retardant agent and finishing auxiliaries, surface property, and wicking property. From this results, the addition of washing and renapping process after the shearing process was required for the more effective in producing PET flame-retardant sheet by the standard finishing. The effect of the modification of the regular flame retardant finishing process was studied by FTIR, TGA, and flame retardancy test.

The Antimicrobic Effect of Antimicrobial Finish and Successive Process of Chrome-Tanned Leather for Apparel. (의류용 크롬유혁의 항미생물가공 및 후속공정에 따르는 항미생물 효과)

  • Sim, Mi Sook
    • Textile Coloration and Finishing
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    • v.8 no.5
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    • pp.1-6
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    • 1996
  • To obtain the basic data of the effect of antimicrobic finishing on chrome-tanned leather for apparel, it was studied that the specimens given from each step of manufacturing process, that is, steps before and after neutralization and after fixation were treated with Si-QAC as a antimicrobic finishing agent, and the antimicrobic activity was evaluated. The results were as follows: 1. The bacterial reduction of the specimens finished antimicrobically were 100% and 94.4% before and after neutralization respectively, however, the specimens carried out successive process after antimicrobic finishing exhibited the reduction of 16.5% and 14.8%. It was assumed that the antimicrobic agent was washed off by the successive process. 2. When the antimicrobic finishing was carried out on the specimens after fixation the bacterial reduction was 95.0% and then the specimen carried out successive process was 97.3%. This result indicates that antimicrobic finishing on the leather would be given after fixation rather than before and after neutralization.

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The Effect of Vibratory Magnetic Pole by Magnetic Abrasive Finishing (자기연마법에서 자극 진동 효과)

  • Park, Won-Kyou;Rho, Tae-Woo;Choi, Hwan
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.4 no.1
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    • pp.7-12
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    • 2005
  • An internal finishing process by the application of magnetic abrasive finishing has been developed as a new technology to obtain a fine inner surface of pipe. In this paper, another method of magnetic abrasive machining in which the N and S magnetic poles are vibrated and a workpiece is rotated only is tried in a non-ferromagnetic pipe(SUS304), and its finishing characteristics is experimently investigated by various effective factors such as vibrating frequency and amplitude. From the experimental results, it is found that the vibration effects of magnetic poles on the finishing characteristics are large in internal finishing.

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