Case Studies

INTERNAL MACROS DEVELOPED FOR STANDARD GEOMETRIC SHAPES SIMPLIFY PROGRAMMING AND IMPROVE QUALITY

PARAMETRIC PROGRAMMING IMPROVES QUALITY & REDUCES COSTS

The original purpose of standard macros was to reduce program variables for repetitively used geometric shapes.

Computer Aided Manufacturing (CAM) provides ultimate flexibility, but machine programmers often use that flexibility unnecessarily. By developing standard macros for boring holes and machining (extruded) bosses, Central Screw Products reduces cycle times and improves control of critical dimensions including diameters and concentricity.

By identifying the value and potential of parametric design, CSP develops in-house macros for all standard geometries.

Many Engineering CAD packages have made an impact on manufacturing by promoting parametric design capabilities. They allow for the design of a family of products around parameters or variables that can be automated to produce infinite variations of the same core design. By identifying the value and potential of parametric design, CSP develops in-house macros for all our standard geometries.

Now entire families of components can be fabricated in the same work cell without requiring re-programming by a standalone department. This practice saves time and cost while also streamlining manufacturing operations to meet modern parametric design practices.

ERROR-PROOFING OPERATORS WITH INTELLIGENT PROBING ROUTINES

PROBING WITH POKA-YOKE SAFETY GATE REDUCES DOWNTIME

A poka-yoke is any mechanism in a lean manufacturing process that helps an equipment operator avoid (yokeru) mistakes (poka). Its purpose is to eliminate product defects by preventing, correcting, or drawing attention to human errors as they occur. The mis-loading of stock is the most common user error at any machine cell. In the few cases where a Fanuc robot is not available or applicable, Central Screw Products looks for ways to use automated technology to error-proof workflows.

Using physical safety gates is an effective method for error proofing the human process in lean manufacturing. The probing routine ensures the part is loaded safely to avoid risk to the manufacturing cell. This procedural “safety gate” is a fast, automated, and reconfigurable way to reduce cost and maintain on-time delivery.

At CSP, we use Renishaw and Blum probes at every milling machine on our shop floor. While familiarity with probing technology has increased throughout modern manufacturing, its application is often resisted due to cycle time contribution. Concise probing routines using both Renishaw and Blum Probes in sequence demonstrate efficiency improvements with only marginal cycle time increases.

Despite the marginal cycle time increase, we create more value on our floor with increased efficiency and fewer operator errors. We developed a simple macro routine for probing stock location to ensure operators follow procedure and eliminate non-conforming part production.