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Press-manufacturing technology and metal die technology, which we have built up since our inception, have earned us a high reputation for the auto parts and office automation equipment parts we supply. The unique know-how we have accumulated over the years enables us to meet the diverse needs of today.
| The needs and requirements for parts vary with changes in the automotive industry |
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In recent years safety standards have become stricter and stricter. Also, the market is asking for lighter cars. As such, parts for cars are now required to be both "lighter in weight and greater in strength." |
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| Achieving lighter weight and greater strength |
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In order to meet these conflicting requirements of "lighter weight and greater strength," we are utilizing the press-forming technology and structural strength design strategies it has built up over the years. And we are now focusing its efforts on the commercialization of high tensile steel sheets, which have greater strength than ordinary steel sheets. We take pride in literally being the pioneer in supplying pressed products fabricated from high tensile sheets for use in body frame parts - such as pillars - which have to meet particularly stringent safety requirements. |
| The strongest high tensile sheets |
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Topre uses high tensile sheets of 1,180 MPa* (120 kgf) for bumpers and door beams, previously made sheets with a strength rating of 980 MPa (100 kgf). Topre's steel is among the strongest in the world and the parts we produce are highly thought of by automakers.
*MPa: A unit of stress. A steel sheet of 1,180 MPa can stand a force of 120 kg per mm2 of a sectional area. |
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| Highly rigid boxes evolve with the times |
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Office automation (OA) equipment today calls for increasingly higher screen quality and speed. This entails stricter accuracy requirements for boxes housing OA items, and these are required to be even lighter and more rigid. |
| Topre's original process achieves about nine-times rigidity |
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The slightest distortion of a box housing an image scanner can affect the accuracy of readings, so the housing has to be rigid enough to stand every conceivable bending force. Topre has devised a fabricating process that involves bending the side and bottom plates into a pipe shape and forming them into a box. This enables the box to be about nine times as rigid as a conventional box. |
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| Development of pressed square pipe to increase design freedom |
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When a new product is to be developed, commercially available pipes might not fit the dimensional requirements of the designer. Topre has developed a pressed square pipe, which is fabricated by boring holes in and embossing the steel sheet and then pressing the sheet into a pipe shape. This has realized greater freedom of shaping and allows the designer to select the size, sheet thickness and shape of preference. |
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| Laser welding raises rigidity by 30% |
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With a view to further increasing rigidity*, Topre now uses welding for the assembly of items previously assembled by screwing. Since a laser-welded product can recover its original shape even if twisted, it can be expected to prove highly restorable and about 30% more rigid than similar products assembled using screws.
*Rigidity: The extent of bending when subjected to a load of 1 kg. |
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