Meeting design needs for custom forklift attachments

John Harder & Company | Constructions mécaniques & Equipements lourds | USA

Meeting design needs for custom forklift attachments

John Harder

Case Study

Meeting design needs for custom forklift attachments

John Harder & Company

CAD with embedded simulation provides fast and accurate job quotes

John Harder & Company (JHC) designs forklift attachments and machinery to handle materials as important as space shuttle engines and as hazardous as uranium and nerve gas.

Any custom attachment the forklift original equipment manufacturers (OEMs) and dealers need for their material handling customers, JHC can design, validate and build. The company focuses on specialized, custom-built attachments designed to fit its customers’ individual requirements.

More than 20 major forklift truck OEMs use JHC attachments. Thousands of enduser companies buy JHC attachments to handle materials including metals, lumber, paper, appliances, chemicals, food, agricultural goods and many more.

To stay competitive and maintain itself as one of the largest makers of specialty forklift attachments, the company has stayed current with the most productive engineering software tools available. In the early 1990s, JHC moved off its drawing boards to 2D design software. Then, in 1998, the company transitioned to 3D solid modeling, selecting Solid Edge® software from PLM (PLM) specialist Siemens Digital Industries Software.

“Design tasks that took six hours on a drawing board dropped to about four hours using 2D computer-aided design (CAD), and then to 15 minutes with 3D Solid Edge,” says Mike Peterson, president of the Saint Louis-based company and a former aerospace engineer.

The company recently adopted Solid Edge Simulation to extend its engineering capabilities with integrated stress analysis. “Manual stress analysis is time-consuming to verify alone, so we added Solid Edge Simulation about three years ago,” Peterson says. “We use simulation every week. It gives you an added feeling of security and has helped prevent some designs that were too weak. Solid Edge Simulation used early in the development process provides a good, easy way to visualize and prove a design.”

Quoting custom jobs

To meet the demand for custom forklift attachments, the company must quickly quote jobs to its customers. Forklifts sold by the OEMs and dealers must be certified to lift-defined weight loads. Because add-on attachments reduce the lift-weight rating, JHC must find ways to minimize weight and maintain strength.

To meet customer demand, the company looked into simulation software to check strength, yet keep weight down. Starting with a built-in Solid Edge simulation application for single parts, JHC turned to a third-party finite element analysis (FEA) tool. “We needed to validate assemblies, not just parts,” notes Peterson. When Siemens Digital Industries Software developed a new add-on FEA package for multi-part assemblies ‒ Solid Edge Simulation ‒ the company dropped the third-party tools in order to benefit from a CAD-embedded solution that could be used early in the job-quoting and design processes.

“With CAD-embedded simulation, we can verify manual calculations but don’t have to depend on a third-party package that is not integrated,” says Peterson. “Embedded FEA cuts cost and avoids time-delaying outsourced FEA. We can just do it ourselves.”