CAD/CAM

Job shops commonly receive corrupted or “dirty” CAD files from their customers. These files must be cleaned or repaired before toolpaths for machining the workpiece can be created. Software solutions like SpaceClaim, developed by ANSYS Inc., can fix dirty models, with the end goal of creating “watertight” solids ready for machining.

New, ultraresilient workpiece materials with high strength-to-weight ratios have cutting tool vendors and CAM developers scrambling to design new tools and toolpaths to efficiently cut them. To succeed, the vendors and developers must collaborate with unprecedented frequency.

Machine tool builders, tool suppliers and software developers now deliver technology that makes it possible for CNC operators to set up jobs in minutes rather than hours, and deliver parts in days instead of weeks. 

Good optimization software must take into account all the known challenges to optimal machining, which include heat, vibration, deflection, chip buildup, material hardness and a machine tool’s horsepower, torque, rigidity, spindle speed, maximum feed rate and accuracy. What's more, end users must also select the appropriate cutting tools and machining parameters.

Presented here is the second part of a two-part series of columns about the importance of becoming familiar with CNC programming code. The following describes the steps involved in manually writing a program.

In the first part of this two-part series, I looked at what actually happens in the cutting zone and how that knowledge allows end users to select the best possible cutting tool and CAD/CAM strategy for a particular material to optimize material removal. This second part covers why it is important to adopt this approach not only for all CNC machining processes, but as a significant production cost-saving measure companywide and industrywide.

Shop Operations column looks at the benefits of becoming familiar with CAM software.

CNC machining takes a blend of computer skills and machining skills. Some competent machinists, especially old-timers, lack the computer skills needed to go from print to part using CNC machines. I previously lacked the computer skills, but couldn’t tolerate not having complete control of the jobs I was running. Therefore, I taught myself the computer side of CNC machining so I could create my own programs. 

Four major players involved in industrial automation are collaborating on the development of a platform that connects CNC machines, robots, peripheral devices and sensors. The purpose of the system is to deliver analytics that optimize manufacturing production.

As CNC machining gets more complicated, the chance of programmer and operator errors increases. These errors can cause collisions involving machine components and workpieces during the cutting process, resulting in downtime and part, tool and machine damage. Costly crashes aren’t inevitable, however, thanks to technologies aimed at preventing collisions and minimizing their impact.