Across the world, linear actuators perform lifting and positioning functions on a host of equipment. Designed for applications where hydraulic and pneumatic cylinders cannot operate, these vital actuators fulfill a variety of tasks, often in hostile environmental conditions. As part of the Altra Industrial Motion Corporation, Warner Linear, a manufacturer in this sector, has implemented lean manufacturing practices to reduce lead times for all orders, including bespoke solutions.
Linear actuators are well suited for the applications where an alternative to hydraulic or air cylinders is needed, or where hydraulic power sources are not available. As a leading manufacturer, Warner Linear actuators are found in a broad spectrum of applications such as agricultural vehicles, aircraft, construction machines, medical equipment, military vehicles, packaging machines and offshore vessels; in addition to an increasing market for emerging technologies such as wind turbines.
The actuators operate efficiently thanks to an electric motor combined with a high-efficiency gear train, hardened as standard, and a ball screw and ball nut drive. These components are durable and require little maintenance, which ultimately reduces their lifetime costs and improves productivity. The standard designs have load capacities from 200 – 20,000 Newtons and are usually specified for heavy duty applications. The overall construction of the actuators minimizes any maintenance requirements and provides a reliable component capable of performing in harsh operating conditions.
Linear actuators are well suited for the most demanding applications where an alternative to hydraulic or air cylinders is needed. This functionality is achieved by creating seal designs that have enabled all of Warner Linear’s actuators to have an ingress protection rating of IP69K when static and IP66 when dynamic. The lesser-known IP69K rating ensures that equipment is suitable for wash down with high pressure, high-temperature water.
Many industries are increasingly coming to appreciate the benefits that electric actuators can bring to a range of applications. Without the need for a hydraulic or pneumatic supply, both installation and maintenance is simpler. Furthermore, additional controls can be easily added to provide wireless operation or increased automation with limit switches and position feedback.
The growing popularity of linear actuators has been reflected in Altra’s decision to increase the support for these products by providing new production equipment and the development of manufacturing processes, which have helped to further improve efficiency and product reliability. This support has also enabled the implementation of a lean manufacturing process, which has benefitted the entire company and its customers.
The standard designs provide load capacities from 200 – 20,000 Newtons and are usually specified for heavy duty applications. Batch production has been replaced with one piece flow, with a manufacturing stream being created for each product line. Each stream is staffed by a dedicated team and team leader and the single piece flow means that any delays or issues in production can be immediately identified and addressed. If issues do occur, emphasis is placed not just on fixing the problem, but also on preventing its reoccurrence.
The teams working on the line have been trained in root-cause problem-solving techniques and daily meetings are used to review the production performance and the progress of ongoing improvement activities. The emphasis is on continual improvements in cost, quality and flexibility and the relentless elimination of waste.
The introduction of the lean manufacturing approach has already transformed the efficiency of the production process. Components can now be manufactured and shipped in as little as four hours. Even the lead time for bespoke products, which have a more complex manufacturing process, has been halved from 30 days to 15 days.
Furthermore, the adoption of lean management principles has brought additional improvements in quality and reliability. With ever increasing pressures in all industries to keep costs low and improve efficiency.
Altra Industrial Motion
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