Backward blanking die and blanking machining method thereof

Abstract

The invention discloses a backward blanking die and a blanking machining method thereof. The backward blanking die comprises a forward blanking punch, a backward blanking punch, a forward blanking female die plate and a backward blanking female die plate; the backward blanking female die plate is located above the forward blanking female die plate, a forward blanking female die is arranged on theforward blanking female die plate, a backward blanking female die is arranged on the backward blanking female die plate, the forward blanking punch penetrates through the backward blanking female dieand points to the forward blanking female die, and the front end of the backward blanking punch penetrates through the forward blanking female die and points to the backward blanking female die; and aspring is installed at the tail end of the backward blanking punch, the spring is arranged in the length direction of the backward blanking punch, and the outer contour of the forward blanking punchis larger than the inner diameter of a blanking groove in the forward blanking female die. According to the backward blanking die, the structure is simple and reasonable, the manufacturing cost is low, the blanking quality is good, burrs cannot be generated along an edge after blanking, and the use effect is good; and meanwhile, the machining method does not require for manual judgment, the die and the method can be applied to the production process of a mechanical assembly line, the machining cost is low, and the machining efficiency is high.

Description

technical field [0001] The invention relates to the field of punching processing, in particular to a reverse punching die and a punching processing method thereof. Background technique [0002] Blanking is a common metalworking process. During the blanking process, there are often longitudinal burrs on the lower surface of the blanked parts, which seriously affect the appearance and quality of the product. The height and size of the burr mainly depend on the material, strength and thickness of the metal being processed. When the metal to be processed is fixed, it also has a great relationship with the blanking gap of the die and the wear of the upper and lower die edges. However, even if the blanking gap is improved, the wear of the upper and lower die edges can be improved, and although the height of the burrs can be limited to a certain minimum value, it is impossible to completely eliminate them. [0003] Therefore, a burr-free blanking process is required, which is su...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above technical problems, the present invention provides a reverse punching die and its punching processing method. Aiming at the deficiencies in the prior art, through the way of incomplete punching with positive and negative gaps, combined with reverse punching, It solves the problem that the lower surface of the punched part has longitudinal burrs when it is punched in the existing way

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