1. In order to solve the problem of slow cooling rate of the cooling bed, a water mist fan was set in the cooling bed area to control the cooling rate of the cooling bed area, and a set of water mist nozzles was set one meter before the shearing machine to set the temperature of the channel steel shearing part. This avoids shear defects caused by high steel temperatures. There are many kinds of AH40 shipbuilding steel plates. The basic process of Shaoguan die forging is the die forging process: blanking, heating, pre-forging, final forging, punching and skinning, trimming, quenching and tempering, and shot blasting. Commonly used processes include upsetting, lengthening, bending, punching, and forming. Commonly used die forging equipment Commonly used die forging equipment include die forging hammers, hot die forging presses, flat forging machines and offset presses, etc. Generally speaking, cast flanges are better, usually produced by die forging, with fine crystal structure and high strength, but of course they are more expensive. Both cast flanges and cast flanges are common flange manufacturing methods.
2. In view of the problems existing in the design of the channel steel shearing edge of the AH40 steel plate, combined with the actual production conditions, the shearing edge is designed into the shape shown in Figure 2 (taking 100# channel steel as an example). The width of the upper shearing blade is changed from 100mm to 99mm. The gap between the upper shearing blade in the left and right directions can shear the two corners of the channel steel. There are many types of AH40 shipbuilding steel plates. The Shaoguan Conference opened. The market fluctuated at a high level. The market mentality remained stable, but the transactions at the high level were obvious. After the decline, some transactions were completed at low levels. The overall mentality of merchants is acceptable. Downstream terminals mostly operate according to inventory replenishment. Considering the limited demand for inventory, the inventory of finished products is small. Although it is the "gold, silver, and four" season in the steel market, There is insufficient follow-up of terminal demand Cheng Fang. Considering that social inventories and factory inventories have both increased and cost support remains, it is expected that steel prices will remain stable and rise slightly tomorrow. The arc size of the two corners of the lower shearing blade is changed from R8mm to R7mm, the shearing weight of the two corners, the channel steel shoulder shearing; the upper width of the lower shearing blade is changed from 79mm to 80mm, and the lower width is changed from 97mm to 94mm, so that The slope of the leg end of the lower shearing blade is smaller than the slope of the finished channel steel pass, so that when the legs are sheared, the upper and lower parts of the legs will not be stressed at the same time, resulting in shearing force and shearing.
3. AH40 steel plate AH40 ship plate Shaoguan conducted data regression analysis on the actual shear and shear gap of each specification of channel steel, and formulated the shear gap specifications of each specification, specifically: 0.20~0.30mm for 63# channel steel, The 80# channel steel is 0.20~0.35mm, the 100# channel steel is 0.25~0.35mm, the 120# channel steel is 0.25~0.40mm, and different gaskets with thicknesses of 0.20~1.00mm are made. Every time you replace the cutting blade, measure the gap first, and then select the corresponding gasket to ensure that the shearing gap is controlled within the range of process requirements.
The basic basis for the design of AH40 steel plate AH40 ship plate Shaoguan channel steel shearing edge is the shape of the finished channel steel pass. This design is prone to the following problems during shearing: First, the two shoulders of the channel steel are relatively thick compared with other parts. , the shearing force required is also large, and the cutting blade wears out quickly, after the cutting blade is used for a period of time. This part has a relatively large amount of wear, resulting in a large gap between the shoulders and prone to shoulder collapse; secondly, compared with the waist, due to the influence of the shearing angle, when the shearing edge is worn, the two sides of the AH40 shipbuilding There are many types of steel plates. Shaoguan steel billets have risen again, and the cost support is relatively strong. With the high level of snails, the spot market trading sentiment has improved. The guidance price of steel mills is temporarily stable, and the demand has not increased. The overall inventory has declined somewhat, which is less than expected. , Steel prices have risen too fast since the holiday, and market sentiment has fluctuated greatly. Merchants are cautiously waiting and watching. It is expected that profile prices may be stable and reasonable tomorrow. When the legs are cut, the amount of shearing becomes smaller, and the shearing of the legs changes from normal shearing to tearing, and burrs easily appear on the end face of the channel steel legs; third, the slope of the upper and lower shearing blade legs is basically the same as the finished channel steel pass shape. , so that the legs are basically stressed at the same time during shearing, the shearing force is large, and the shearing blade wears out quickly. On the one hand, the shearing indentation on the leg end is serious, and on the other hand, after the shearing blade ages, it is easy to shear the channel steel. There are many parts and burrs. The latter two points are the main reasons affecting channel steel shearing.
