EN
AR
NL
FR
DE
IT
JA
KO
PT
RU
ES
TL
ID
VI
TR
The quality of the bend ultimately depends on the tooling. Of these important devices, the bending die is of significant influence. Surface Finish is Fundamental While much attention may be given to the material strength or total design of a die, one of the most basic and overlooked characteristics though is surface finish. At Nanjing ACL Machinery factory, we appreciate that a ground surface is much more than just cosmetic, but an essential requirement in order to deliver the performance and durability demanded from a high end bending die.
The Perfect Bend Starts with the Right Finish
The face of the bending die is where high localized pressure to the sheet metal is applied. Anything that’s imperfect with this surface, no matter how minute, may be imprinted into the part. A precision-ground surface is obtained through a careful machining process that provides a extremely flat and uniform finish. This removes the smallest hills and valleys to a surface free of tool marks, variations and flaws.
Why does this matter so much? The die is forced towards a piece of metal and the shape of it gets produced in the part. The friction and resistance is caused by a rough die surface. This friction can cause a cascade of issues, most notably scratches or galling on the material. And this is absolutely devastating for manufacturers that use pre-finished or coated materials like brushed stainless steel or painted aluminum. This contact resistance is reduced by a precision-ground finish, permitting the work to be inserted easily into the die cavity. The result is a cut that displays no markings on the cut face that could detract from its appearance or weaken the final product with cleanup or sanding.
Improving Performance and Tool Life
In addition to helping to protect the workpiece, an outstanding surface finish has a significant effect on the performance and useful life of the die itself. And friction isn't only a nemesis of surface finish, it's also the culprit for tool wear. The surface will generate more heat and friction on the bend radius, wearing out the crucial edges and shoulders of the die quicker. In time these wears add up to machine loss of dimensional accuracy, which results the need for more frequent tooling changes.
A precision ground surface also minimizes the coefficient of friction. This easy push and pull eliminates the need for a lot of force when bending, which lessens the stress on the press brake and die. Also, since the abrasive wear is much less, it ensures that the die retains a true geometry and sharp corners for long periods of time. This obviously translates into longer life of tool, preventive downtime for changeover and in term long savings cost for our customers. These dies are metal worthy, so well worth the investment, you get good clear quick easy cuts for years!!
The Security of Consistency and Accuracy
In modern manufacturing, it’s all repeatable, or bust. All bent parts must be the same as the last - within tolerances for angles and dimensions. The importance of die surface in this cannot be overstressed. The sheet metal may adhere to or shift slightly on an uneven or non-perfect surface during bending. This inconsistency can create differences in the bend angle (spring back) and also cause part to deflect.
The perfect flatness and uniformity achieved by precision grinding the face of this plate ensure that there will be no wrinkles in your entire bend, with consistent pressure applied throughout. This eliminates random friction points, and permits a controlled, predictable filling of the metal. The result is an enormous improvement in the bending accuracy and repeatability. This feature assures the manufacturer that there will be no variation between parts, even if produced in large batches, thereby also eliminating waste while enhancing product quality.
At Nanjing ACL Machinery Factory, Sophisticated grinding of our bending dies is the foundation of our guaranteed versatility. This is a major milestone, and it really represents our dedication to give our customers more than tools -- actual industry-leading solutions that improve their manufacturing output and defend their bottom line. From the moment you purchase one of our dies, you are building on a foundation made of quality that will deliver optimal results, every time parts after part after part.
