What is hole making?As the name implies, the operation of machining holes on solid materials (such as steel plates, steel sections, etc.) with hole processing machines or machines.The processing methods of holes are complex and diverse. The processing of fastener holes is generally drilling, which is suitable for the through holes of mounting screws and some rivet mounting holes.Before drilling, the appropriate drill bit should be selected according to the type and size of fasteners to ensure that the hole size is within the allowable range.In the process of drilling, the perpendicularity of the hole should be ensured first, and then the smoothness of the hole wall should be ensured. Otherwise, the installation quality of fasteners will be affected.When making holes for thick aluminum alloy materials with larger load, the inner surface of the holes should be hardened by cold work. For the holes with smaller size, a “drawing” process is adopted.For the larger size hole, the inner wall of the hole should be shot peened.This can greatly improve the fatigue resistance of the hole. 

 There are usually two methods of drilling and punching. 

Hole making of steel components in steel structure company

Drilling: widely used, the principle is cutting, high precision, small damage to hole wall.

 Punching: generally only used for thin steel plate and non-circular hole processing, and the hole diameter is generally not less than the thickness of steel.

 Hole making has a certain proportion in the steel structure manufacturing, especially the use of high-strength bolts, so that the hole processing not only in the number, but also in the accuracy requirements have been greatly improved.Shandong Sanwei Steel Structure Co., Ltd. keeps improving and actively innovating in hole making, and has the invention patent certificates of “automatic steel pipe combined drilling machine system” and “CNC steel pipe combined drilling and milling machine system”, as well as utility model patent certificates of “CNC steel pipe combined drilling and milling machine system” and “automatic steel pipe combined drilling machine”.

 With the support of this steel pipe drilling process, 3D steel structure has long-term cooperation with the top three companies in the photovoltaic energy industry in the United States to produce solar photovoltaic support.Of course, the drilling process can not be 100%, every hole meets the requirements.What to do in case of hole deviation?Three dimensional steel structure gives you advice: 

Hole drilling of steel components of solar photovoltaic support

　　1.When the deviation of the bolt hole exceeds the allowable value specified in the table above, it is allowed to use the welding rod matching with the base material to make the hole again after repair welding, and it is forbidden to use steel block to fill.

 　　2.When the accuracy requirement is high, the number of laminated plates is more, and the hole spacing of the same kind is more, the method of drilling mould hole or pre drilling smaller hole diameter can be used to enlarge the hole during assembly.The diameter of pre drilled holes depends on the number of stacks. When the number of stacks is less than 5, the diameter of pre drilled holes is less than grade 1 (3. OMM) of nominal diameter; when the number of layers is more than 5, the diameter of pre drilled holes is less than grade 2 of nominal diameter (- 6. OMM).

 The above is the Hongjishunda steel structure company on steel structure engineering in the steel structure of the technical article, Hongjishunda steel structure Co., Ltd. is engaged in steel structure engineering, construction engineering, steel member processing and export, steel structure workshop construction design and other types of engineering.Three dimensional steel structure is a company with more than ten years of steel structure engineering experience. It is a set of steel structure design, processing, installation, maintenance, anti-corrosion, and other aspects in one, to provide you with one-stop construction services.Professionals to do professional work has always been the purpose of three-dimensional, will be able to build high-quality building steel structure engineering.