Manufacturing method and repair method of insert for hot stamping die
A technology of hot stamping die and manufacturing method, which is applied in the direction of manufacturing tools, forming tools, metal processing equipment, etc., can solve the problems of hot stamping production of ultra-high strength steel with low service life, hot cracking of inserts, and high manufacturing cost, and achieves Solve the effect of low service life, low cost and long service life
Inactive Publication Date: 2017-06-13
CHONGQING UNIV +1
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Problems solved by technology
At the same time, the sheet metal needs to be quenched and cooled in the mold during the forming process, and the hot stamping mold causes thermal fatigue during the rapid heating and cooling cycle, and the service life is low
[0003] At present, imported steel H13 is used to prepare hot stamping mold inserts to meet the basic production needs. When the mold is hot stamped about 200,000 pieces, the inserts are prone to thermal cracks; such as the B-pillar of a car, the cost of hot stamping molds is 300 More than 10,000 yuan, the cost of sharing the mold for a single product is as high as 15 yuan
Therefore, inserts with high manufacturing costs and low service life are the key bottlenecks restricting the hot stamping production of ultra-high-strength steel
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[0028] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0029] The insert manufacturing method for the hot stamping die of the present invention comprises the following steps:
[0030] 1) Rough machining and quenching and tempering of ordinary forging steel or ordinary forging die steel to obtain the basic shape of the insert and leave a certain margin;
[0031] 2) Cut the working surface of the insert along the depth direction by 5~10 mm;
[0032] 3) welding the high-temperature and wear-resistant welding core on the working surface of the insert by surfacing welding to form the additive manufacturing layer 2, and the thickness of the additive manufacturing layer 2 is 1-12 mm;
[0033] 4) Finishing the inserts and obtaining inserts that meet the dimensional accuracy requirements;
[0034] 5) Quenching the insert as a whole, so as to obtain the final insert for hot stamping die, its structure is...
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The invention discloses a manufacturing method of an insert for a hot stamping die. The method includes steps: 1) taking normal forged steel or normal forging die steel as a base material, and performing rough machining and thermal refining to obtain a basic shape of the insert, wherein a certain margin is reserved; 2) cutting the operation surface of the insert along a depth direction by 5-10mm; 3) welding a high-temperature-resistant abrasion-resistant welding core to the operation surface of the insert by means of surfacing to form an additive manufacturing layer in a thickness of 1-12mm; 4) subjecting the insert to finish machining to obtain the insert which meets utilization dimensional precision requirements; 5) subjecting the insert to integral quenching to finally obtain the insert for the hot stamping die. The insert manufactured according to the method has advantages of long service life and low cost. The invention further discloses a repair method of the insert for the hot stamping die. According to the method, inserts with cracks and requiring repair can be remanufactured quickly, and cost reduction and material saving are further realized.
Description
technical field [0001] The invention relates to the technical field of molds, in particular to an insert manufacturing method and repair method for hot stamping molds. Background technique [0002] The application of high-strength and ultra-high-strength steel plates for vehicles in the automotive industry has attracted more and more attention due to their light weight and high strength characteristics, and has become an important way to simultaneously meet the requirements of vehicle lightweight and safety performance. Ultra-high-strength steel sheets are usually formed by hot stamping. Since the sheet metal is heated above the austenitization temperature in the hot stamping forming process and then stamped in the mold, the surface temperature of the mold rises rapidly, and the temperature of the mold rises after the temperature rises. The strength and hardness will decrease accordingly, and the wear will increase. At the same time, the sheet metal needs to be quenched and...
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IPC IPC(8): B21D37/20
CPCB21D37/20
Inventor 周杰熊煜何雄向荣刘杰丁蓉蓉朱姗姗
Owner CHONGQING UNIV