Abstract
In the discussion about manufacturing at present, the computer-aided technologies, e.g. Computer-integrated Manufacturing and NC machine tools, should be, without exception, considered. In consequence, we believe that automated manufacturing is dominant, and often forget that the mature skill has been and is playing the very important roles for ever. In the machine tool sphere, one of such mature skills is Scraping. In fact, the scraped slideway shows the much more excellent performance than those facilitated by the linear roller guide and finished by precision guideway grinding machine. Importantly, scraping is one of the evidences to display the superiority of the mature skills derived from endowments of human being as compared with the utmost advanced industrial technology. It is thus very interesting to unveil the essential features of scraping by modelling it with the two-dimensional step-land thrust bearing.
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- 1.
These know-hows were collected from the turnery of Mizonokuchi Factory within Ikegai Iron Works in the 1960s. It is interesting that the in-feeding method for HSS tool has been recently revived and applied to thread cutting for the difficult-to-machine work by the cemented carbide tool.
- 2.
Obviously, there are certain differences in the role of mature skills and their replacement by the technology depending upon the product kind. For example, in the production of Vacuum Fluorescent Display, the mature skills are replaced continuously and gradually by the new technology, but not the furcate way, i.e. either skill or technology. Thus, the synergy of mature skill with the new technology is mandatory.
- 3.
The flat scraper with spring action is one of the variants in the flat scraper family, and it has been said that this scraper was contrived in Japan on the occasion of the mechanisation to overcome the physical weakness of Japanese finisher.
- 4.
Even in the case of the hardened bed slideway, the opposite slideway of the tarvelling body, e.g., carriage or table slideway, is not hardened and in general the Turcite is bonded on it. As a matter of course, the Turcite slideway should be scraped.
- 5.
These scraped surfaces was produced to associate with an investigation into the rigidity of the slideway, extremely unveiling the upper limit of the rigidity of the scraped slideway [4].
- 6.
On that occasion, FEM was not available and thus the numerical calculation was carried out using the Relaxation Method.
References
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© 2014 Springer International Publishing Switzerland
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Ito, Y. (2014). Clarification for Essential Features of Scraped Slideway by Step-Land Bearing Model: Conversion of Skilled Craft to Industrial Technology. In: Ito, Y. (eds) Thought-Evoking Approaches in Engineering Problems. Springer, Cham. https://doi.org/10.1007/978-3-319-04120-9_13
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DOI: https://doi.org/10.1007/978-3-319-04120-9_13
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