OR Streangth, Additional Aspects Bear Consideration.
In Addition to Forward Tonnage, Snap-Through and Reverse Tonnage Should be taken Into Account (See Figure 1). Often the TERMS are used incorrectly as synonyms; They Are Not.
On One Hand, Snap-Through Can Be DEFINED as the Sudden Release of Stresses that Leads to Rapid Acceleration of the Press Slide and the Connected Components, after Material Breakage.
On the Other Hand, The Reverse Tonnage Can Be DEFINED by the Forces Creating Tension on the Connections. Even Though Both Typically Occurly, One Can Exist with the Other.
Each is related to differen failure models: snap-through is related to vibration issues, while reverse tonnage is related to proplems with the presponents ’eLimits.
CaPacity. This is important to consider beCause, in certain cases, reverse tonnage calling be the limiting factor, every when the fulls capacity has not ben met.
Left-TO-RIGHT DIRECTION, While Those with Four Connections Also Add Support on the Front-To-back direction.
33% USAGE of Bed Length -Hallf The Original Values.
BeCAUSE of the Nailable TONAGE Increases as the Rotation Angle Gets Closer to 0 and 180 De DEAD Center (TDC) and Bottc.
In theory, the available tonnage friend reACH An infinite value at BDC and TDC. In reality, this is not public, beCAUSE The Press Struction Fail At Point ABove Its
Then, then
And Other Components in the Transmission), The Shorter the Total Press Stroke, The Higher The Available Tonna (SEE FIGURE 4).
Then, then
Below the Available Tonnage Curve of the Press. There is Important to Consider the Complete Evolution of the TONAGE and Not only the Peak Value.
for this task. As a guideline, Figure 5 shows typical tonnage versus strikes for various sheet metal forming operations.
There are two different ways of Exceeeding Press Tonnage, and the consequeences all are display.
a Common Observation on the Shop Floor. Overloading The Press ABove the Rating Point Affects Components UNDER TORSION Stresses The Most.
On the Other Hand, Major Failures on the WHOLE PRUCTURE Can Occur If the Tonnage Exceeds ITS TONNAGE CAPACITY.
To One-Third of the Press Stroke. Half of Press Tonnage Capacity at a Dob Equal to One-TENTH of the Press Stroke. Full Press TonnaCity at the Rated Dob (Rating Point) and
SIMULATION is recommended at this point.
The Press Can. Process RedeSign May Be Needed to Balance the Operation with the Press.
4. IDEntify Any Possible Concentration Load (High Tonnages and Small Die Sets) and Verify that it is acceptable base on the press manuFactureer ’s Recomrations.
6. Compare Metal Stamping Die The Energy Required to Form the Part with Press Capabilities.