Automobile bumper rapid cooling forming device based on hot stamping mode

Abstract

The automobile bumper rapid cooling forming device based on the hot stamping mode comprises a first mold and a second mold, the first mold comprises a first mold base and a female mold, a first electromagnet is arranged in the female mold, and connecting boxes are arranged on the left side and the right side of the female mold; the first magnetic field generator and the first electromagnet are arranged in the male die and the female die correspondingly, an alternating magnetic field generated by the first magnetic field generator can prevent too much reduction of the temperature of a workpiece from affecting the stamping effect, and an oxide skin on the surface of the workpiece can be adsorbed through a magnetic field generated by the first electromagnet; in addition, the cooling device is further arranged, it can be guaranteed that the water temperature in different areas in the cooling pipe tends to a range through the cooling device, the situation that cracks appear on the surface due to the fact that the cold contraction amplitude of the workpiece is different is avoided, and finally the cooling device is automatically controlled and does not need manual operation.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a rapid cooling forming device for automobile bumpers based on hot stamping. Background technique [0002] With the gradual improvement of living standards in modern society, cars have become the daily means of transportation for many people. As a decoration and safety device for cars, car bumpers have attracted more and more attention. A few years ago, car bumpers were usually stamped steel plates. Formed, and in order to pursue economy and lightweight bumpers, the current automobile manufacturers have gradually changed the previous metal bumpers to plastic bumpers. From the perspective of safety, there are still many automobiles on the market. What the bumper of the car uses still is metal bumper, among them the most common with large car. [0003] At present, most metal car bumpers are formed by hot stamping technology. Compared with cold stamping, ultra-high-strength bum...

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Problems solved by technology

[0003] At present, most metal car bumpers are formed by hot stamping technology. Compared with cold stamping, ultra-high-strength bumpers can be obtained through hot stamping technology, thereby reducing the thickness of the bumper and realizing lightweight products from another perspective. According to the patent number "CN201911171970.7" which discloses a double-layer water-cooled mold for making automobile bumpers by means of hot stamping, it can be seen that the current hot stamping molds usually have their own cooling system, and the above patent still has some shortcomings in actual use. For example, the cooling system of the above-mentioned patent uses a water-cooling cavity to cool the workpiece. Cooling by this method will cause the temperature of the cooling water at the water inlet to always be lower than that at the outlet. In actual production, the workpiece is prone to cracks and other phenomena. In addition, because the price of magnesium and aluminum alloys is much higher than that of steel, many domestic manufacturers of metal automobile bumpers still use steel plates as stamping materials, but the steel is delivered after heating. Oxide skin is often produced when it is applied to the hot stamping die, which will not only cause wear on the die but also damage the surface of the bumper after forming. Today's hot stamping dies are basically cleaned of the oxides falling on the steel after the work is over. In the working process of the hot stamping die, the oxide skin is usually not treated, so that the bumper made of steel often has surface damage and other phenomena

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