Technical measures in tubesheet in deep-hole drilling
Before drilling, drill a shallow hole with the same diameter as the drill bit, which can play a guiding and centering role when drilling. This step is especially necessary when machining holes with higher straightness requirements.
Key points of tubesheet in deep-hole drilling
With the continuous development of technology, tubesheet in deep-hole drilling is a typical structure of chip row deep hole drill, it is improved on the basis of the single blade chip row deep hole drill, the cutting edge is double-sided wrong tooth shape
Punching process of steel plate, steel plate machining process
NC punching and blanking: NC punching and blanking is to use the single-chip microcomputer on the NC punch to input the processing program (size, processing path, processing tools, etc.) of sheet metal parts in advance, so that the NC punch adopts various
SPA-H steel plate sample test results
Take a sample of SPA-H steel plate for metallographic analysis. Its matrix structure is ferrite and a small amount of pearlite. The grains are uniform and fine, and the grain size is 9-10. Tensile fracture morphology of SPA-H steel plate: all fractures ar
The smelting process of SPA-H steel plate
The molten iron used for smelting SPA-H steel plate must be pretreated by molten iron desulfurization, the sulfur content of the molten iron is ≤0.010% before entering the converter, and the slag on the surface of the molten iron must be removed. Nickel p
A515 Gr.60 steel plate packing and marking
A515 Gr.60 steel plate shall be packed and marked in accordance with GB/T 247-1997. The surface of each A515 Gr.60 steel plate shall be cleaned and coated with grease or paint repellant, and the packing of each A515 Gr.60 steel plate shall be free from co
Properties of AH36 marine steel plate
AH36 marine steel plate refers to the steel used to manufacture the hull structure of seagoing ships and inland ships, usually high-quality carbon steel and high-quality low-alloy steel. AH36 steel plate is required to have certain strength, toughness and
