西村技研 List of Products and Services

We would like to introduce a case of barrel polishing conducted by Nishimura Giken Co., Ltd. The gas stove component that supports the heating container, known as "gotoku." The customer's specifications regarding the safety of the edges and sharp parts of the gotoku were abstract, stating, "Housewives should be able to touch it with wet hands without getting cut." In response to this challenge, our company used projectors and microscopes to numerically present the rounding dimensions (R dimensions) of the edges and sharp parts processed by polishing. In addition to being able to evaluate objectively, we consistently perform high-quality processing with strict processing procedures to ensure uniformity. Of course, we received high praise from our customers. On our website, we also showcase cases of barrel polishing for "stainless steel vintage trays for bakeries" and "sprockets for motorcycle racing." *For more details, please refer to the PDF document or feel free to contact us.

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This is a case study on the removal of black discoloration layers. We received an inquiry from another barrel polishing company stating, "We had barrel polishing done, and while the burrs were removed, the surface of the item was delivered discolored black compared to before the polishing. We cannot deliver it to our customer in this condition, so is there any way to restore the material's color?" We performed barrel polishing at our company, removing the black discoloration layer and returning it to the original material color. Depending on the type and amount of oil on the raw material before barrel polishing, as well as the polishing conditions, dirt can sometimes adhere to the surface. This issue can be resolved through oil removal (degreasing) and optimization of processing conditions. *For more details, please refer to the PDF document or feel free to contact us.

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★ISO9001-2008 Certification★ Are you concerned about burrs generated during various parts processing stages? Our barrel polishing technology effectively removes burrs, meeting customer demands for both large-scale production and a wide range of shapes, from small to large items. Before you wonder, "Is this type of burr removal possible?" please consult Nishimura Giken. 【We solve these questions and requests】 □ "Can I polish precision parts?" □ "Is this part polishable?" □ "I want to perform polishing that my current supplier cannot do..." Our technical specialists are here to assist you! Feel free to contact us.

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The removal of grease and oil adhered to surfaces such as metals can be efficiently mass-produced with high quality through barrel polishing. Degreasing with barrel polishing allows for relatively low-cost processing, making it suitable for customers who wish to request small-scale degreasing. For customers facing challenges with degreasing, we at Nishimura Giken can suggest appropriate methods upon consultation.

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Barrel polishing is a very suitable polishing technique for rounding the edges of machine parts and metal components. It is evaluated based on three factors: surface roughness, glossiness, and surface color, with customer requests such as "finer," "shinier," and "whiter." While surface roughness and corner radius are indicated in the drawings, requests regarding glossiness and color are mostly expressed in abstract terms. The shape of the surface irregularities, or surface characteristics, varies depending on the processing conditions and polishing materials used in our company. Since we do not have color difference meters or gloss meters, the evaluation is based on visual inspection rather than numerical assessment. However, we strive to respond to requests as much as possible by clarifying differences in surface conditions using magnified images from a microscope. *For more details, please refer to the PDF document or feel free to contact us.*

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Even when it comes to mirror finishing and gloss treatment, the processing accuracy and image can vary greatly depending on the customer. At Nishimura Giken, we carry out processing after thoroughly listening to each customer's requests. Before worrying about whether such a mirror finish can be achieved, please consult with us first.

• Water heater Cooker IH

We remove scale (oxide film) generated by various surface treatments such as heat treatment and nitriding through barrel polishing. It is possible to remove scale while maintaining the surface condition before heat treatment or nitriding. Before worrying about "Is it possible to remove this scale?", please consult Nishimura Giken.

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Nishimura Giken Co., Ltd. conducts polishing processes such as "R attachment and chamfering." The specified R value is approximately ±0.05mm (with a range of 0.1mm). If the desired processing accuracy can be measured numerically, it is possible to process at the designed target value, and products processed based on the specified values provided will be inspected and managed using our inspection equipment. Additionally, the tolerance is approximately ±0.1. For general processing, we can accommodate the above tolerances. We will make every effort to respond to requested tolerances as much as possible after detailed discussions. 【Features】 ■ R value specification: approximately ±0.05mm (with a range of 0.1mm) ■ Tolerance: approximately ±0.1 ■ If the desired processing accuracy can be measured numerically, processing at the designed target value is possible. *For more details, please refer to the PDF document or feel free to contact us.

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Here is an example of removing fine burrs from precision parts. We received a request for burr removal from a precision press-cut plate with a thickness of 0.3mm, featuring a φ5.5 hole at the center of a 17x17 square. The burrs around the φ5.5 hole measured 4 to 5μm in height. If stacked as is, the hole area would slightly bulge, resulting in uneven height and failing to achieve the desired characteristics. Therefore, we removed only the burrs without causing warping or scratches on the flat surface. Additionally, we were able to remove large burrs caused by die chipping on the same plate, measuring 520μm in width, 65μm in depth, and 15μm in height, by matching the media and processing conditions. *For more details, please refer to the PDF document or feel free to contact us.

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