Steel back leveling die

Abstract

The invention relates to the technical field of an automobile brake sheet stamping die, in particular to a steel back leveling die used in progressive dies. The steel back leveling die comprises a leveling male die and a leveling female die, wherein the leveling male die is provided with an upper leveling block, and the leveling female die is provided with a lower leveling block; the working surface of the upper leveling block comprises a first inclined surface, a first plane surface and a second inclined surface, wherein the first plane surface is higher than the first inclined surface and the second inclined surface, and the height difference between the first plane surface and each of the first inclined surface and the second inclined surface is 0.1-0.25mm; the working surface of the lower leveling block comprises a third inclined surface, a second plane surface and a fourth inclined surface, wherein the second plane surface is lower than the third inclined surface and the fourth inclined surface, and the height difference between the second plane surface and each of the third inclined surface and the fourth inclined surface is 0.1-0.25mm; and in the leveling process, the first inclined surface is matched with the third inclined surface, the second inclined surface is matched with the fourth inclined surface, and the first plane surface is matched with the second plane surface. The die has the advantage that the upper leveling block and the lower leveling block are mutually matched to level a feed belt; and compared with the prior art, the manual leveling step is omitted, thus the leveling uniformity is strong, the leveling effect is better, and the outline dimension of the steel back is stable.

Description

technical field [0001] The invention relates to the technical field of stamping dies for automobile brake pads, in particular to a steel back leveling die used in continuous dies. Background technique [0002] At present, domestic auto parts manufacturers generally use the process of progressive forming + composite blanking + manual leveling to produce steel backs. The requirements of the main technical parameters of the steel back are: the assembly size tolerance is 0.1mm, the flatness is less than 0.13mm, and the bright bands on the surrounding sections are all required to reach more than 75% of the material thickness. Among them: the manual leveling step is a relatively important step in the steel back production process, through leveling to ensure the flatness of the steel back. However, due to the manual operation, the randomness is large, the leveling effect is poor (such as embossing after leveling), and it is easy to cause the key assembly dimensions to be unstable ...

AI Technical Summary

Problems solved by technology

However, due to the manual operation, the randomness is large, the leveling effect is poor (such as imprinting after leveling), and it is easy to cause the key assembly dimensions to be unstable or even exceed the specified tolerance

[0003] The steel back made by the above process is difficult to meet the quality requirements of the steel back in the former market (that is, the main engine supporting market, also known as the OE market). This detection method has higher requirements on product flatness

[0004] Although the steel back made by the above process can meet the quality requirements of the steel back in the aftermarket (i.e. the maintenance market), the production cost is high, the production efficiency is low, and the production process is unstable, which seriously restricts large-scale production; and the above-mentioned and aftermarket For the supporting steel back, the flatness detection method generally uses a knife-edge ruler and a feeler gauge for detection, and the detection accuracy is not high

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