Pump trucks sometimes have large quality problems during use, such as broken booms. Then let us introduce the fracture formation and expansion analysis of the pump boom. According to the location and shape of the fracture, most of the cracks are old cracks. It can be inferred that the cause of the boom of the boom-type pump truck is firstly microcracks, and the microcracks are diffused after a certain period of alternating stress to produce macroscopic cracks. Finally, the base material suddenly breaks due to crack propagation and extension. As for the formation of cracks, there are several reasons.
(1) The weld is not fused with the base metal. This kind of defect is common in welding defects. Especially the plate of the boom type pump truck adopts high-strength steel plate. It can be clearly seen from the fracture surface that a weld seam is not well welded.
(2) From the perspective of foreign and domestic design, the boom type pump truck boom, especially the plates of the first few arms connected to the turntable, generally adopt high-strength steel plate. When the high-strength steel plate guarantees the yield strength, some indicators such as plasticity The ductility and weldability are reduced, especially in the area of thermal stress affected by welding, which causes the strength of the weld and the surrounding area to decrease;
Konecra Group specializes in the manufacture of concrete pumping equipment for more than 20 years. The concrete equipment is of various types and high quality. The products are exported to more than 30 countries and regions such as Europe, Asia, Southeast Asia, South America, Africa and Oceania. Adhering to the "customer first principle", we are committed to providing customers with quality pre-sales, sales, and after-sales services, so that our concrete equipment will provide customers with an excellent construction experience. Strong production, management and service teams escort the customer's concrete equipment.
Through the above introduction, I believe that everyone knows why some of the pump manufacturers' booms will break, and the professional analysis has already been known. Thank you for your attention to the official website of Qingdao Koneile Group Co., Ltd. www.conele88.com.