Tube Piercing
H4 Single Clean
H4 holes are another of our most popular applications. Multicyl offers a range of semi standard mandrel punching systems for this application. Unlike the H1, H2, and H3 systems, there are no external guides in the H4 tooling. Instead an internal mandrel is used to support the inner wall of the tube. The mandrel contains a die button which is used to produce a clean hole similar to standard flat material hole punching. There is almost no limit to the tube size for H4 mandrel systems. However, because the tube must be front fed over the mandrel, the hole position must not be after any bends or OD reductions. Important information when requesting a quote for this application includes: tube diameter, material and wall thickness, hole diameter, hole location, and application number (H4). A drawing is always best to quote from. Request a quote by clicking here.
H5 Double Clean
Multicyl offers three types H5 systems. The first is the index method. This type of system uses a tool very similar to that employed in the H4 method with the only difference being the addition of a location pin. The tube is punched, indexed 180 degrees, located with the pin, and punched again. The second type of H5 Multicyl system, which is quickly becoming one of our most popular products, is the double horizontal mandrel system. This system uses a unique set-up of opposing Multicyls. The cylinders are cycled simultaneously, each powering a punch into a custom designed mandrel tool producing the through hole in one cycle. The slugs either fall through a slug chute in the bottom of the mandrel or are blown out a relieved section in its front. This is the best combination of efficiency and safety to be found in producing a clean through hole. The third method is the straight through method, similar to H3 applications. This method uses a long stroke cylinder which powers a punch through the mandrel and into a second die below the tube producing the through hole. This method, however, involves the same maintenance and tube size limitations as with H3 applications. Using the short stroke cylinders employed in the first two options is desirable because they eliminate pinch points, reduce the tool wear and maintenance problems of the straight through method, and can produce cycle times as low as one cycle per second. Important information when requesting a quote for this application includes: tube diameter, material and wall thickness, hole diameter, hole location, and application number (H5). A drawing is always best to quote from. Request a quote by clicking here.
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