An end-of-line test stand enables the function of the manufactured products to be tested at the end of the production process. These testing machines are used for quality assurance and are usually located at the end of assembly or production lines.
The hydraulic test bench developed and implemented by Hänchen itself is used for final testing of hydraulic cylinders, pressure intensifiers and other hydraulic products. Volker Kaiser, team leader of quality assurance at Hänchen: "In the past it was necessary to know every process step in detail. Because in the past, employees controlled the testing process manually. The test pressure was set by hand, which was associated with certain discrepancies. With the automated end-of-line test stand we achieve greater process reliability and at the same time reduce the amount of work effort.
Figure 1 The test cell for hydraulic products is software-controlled.
Figure 2 Each test procedure is initiated from a bar code on the test specimen. Then the automatic test procedure starts.
Test centre for hydraulic products
Anyone who knows the products of the company Hänchen knows that they stand for highest quality. This begins with the consultation on for example hydraulic cylinders in order to select with the customer the product perfectly configured for his/her application. A decisive factor thereafter is the correct and careful design, the choice of the right materials and experience in selecting the purchased components suitable for the application. In the production process, the hydraulic cylinder passes through many production steps that ensure that the cylinder or other product from Hänchen is manufactured with precision. In order to verify this quality standard, all products are 100% tested on the end-of-line test stand after assembly and the results are documented.
The test software written by Hänchen accesses data from the ERP system and thus automatically sets the correct parameters, such as test pressure and speed. At the end of the test, data such as pressure and speed are recorded by the program in a test certificate and archived in the corresponding customer files of the document management system (DMS). There the document can be called up and passed on to the customer if required. Each test procedure can thus be compared and reproduced. A mounting fixture that was specially adapted to Hänchen's typical test specimens enables better and safer handling. It allows components, such as a hydraulic cylinders with an outer diameter of 25 - 500 mm, to be securely fixed. The length of the test cell was designed for a maximum component length of 2.50 m. Larger components can also be connected and tested outside the test cell.
Ratio-Drive® by Hänchen
Experience both in-house and at customer locations
The foundation was laid by internal product development and research, for which test stands were built and developed. This many years of experience makes Hänchen a reliable partner for test rigs that are tailor-made to the customer's specifications. For Hänchen these are "Ratio-Drive® projects", individual drive solutions where the customer has only one contact person for the entire project. Such a solution can be seamlessly integrated into the customer's own systems by means of customer-defined interfaces and is based on an integrated concept. Energy efficiency plays a special role here.
Important steps on the way to becoming a supplier of complete testing machines were in-house and customer projects. This reflects many years of development - starting with cylinder construction, extended by electronics such as sensors for measuring position and force. This was followed by complete drive axles. Through this experience as a system supplier, the company from Ostfildern near Stuttgart learned what the market needs. That is why the company also offers complete machines including axis, rack and machine elements.
Katharina Preiß - Jörg Beyer, mediaword
© Hänchen 2017