Before the hydraulic swivel design process begins, information is gathered and entered into the request for quote. The information includes an existing drawing if available, the operating temperature range, the number and sizes of ports, the operating pressure, the fluid/media used, the function of each passage, and information related to the slip ring if it is included as a combo unit. This is information is used to help determine the swivel bore, length of the swivel, width of the swivel, the housing wall thickness, and mounting position.
Early communication between the designer and the machine operator is essential at the time of design to discuss any foreseeable issues with the fabrication of the swivel. Part models contain all the features and dimensional data necessary to create the drawings for machining the parts. The drawing provides the required views and sections that show all the features of the part, both external and internal, along with dimensions that provide the location and the size of all the features.
On the drawing itself, the title block contains basic information such as the initials of the detailer and date of the completed drawing. It also provides the tolerances desired for each dimension and the number of decimal places shown in each dimension, the weight of the part, and the material required. The assembly model contains all the parts required for a complete unit, while the assembly drawing contains the views to show all the individual parts. Dimensions are used to locate the position of specific parts and also show the overall size of the assembly. Notes are also provided that contain all other information related to assembling the unit that are not included on the drawing.
With a vast amount of information being communicated at many levels throughout the design and manufacturing process of hydraulic swivels, communication is crucial to ensure all of the moving pieces are precisely communicated. UEA utilizes RFQs and various levels of drawings in addition to design and manufacturing software to make certain this information is accurately recorded and available for reference when necessary.
Tom Van Veldhuizen