Deep hole drilling boring tool selection principle


Deep hole drilling and boring tool, deep hole drilling boring head, deep hole tooling aid product description

Scraping Roller Processing efficiency: When processing steel pipe, the processing time of deep hole machine tool is 1 m / 30 min, and the processing time of scraping roller steel pipe is 1 m / 3 min. The scraping roller is 10 times that of ordinary deep holes and honing. Our users use experience feedback.

Scraping Rolling Machine High-efficiency processing principle: Applying deep hole processing rolling technology, it is a non-cutting processing technology. The scraping and rolling machine is a work that can complete the ordinary deep hole with 2-3 times of ordering. Dissolve the rough and fine boring in one, use the push to complete the rough fine, and use the timing of the retraction to complete the rolling process at the same time. Through the deformation of the property, the surface of the inner hole reaches the required surface roughness of the workpiece.

1. Selection principle of cutter material The cutter material should be selected according to the load and cutting state of each tooth. The center tooth is subject to large axial force, severe friction and severe cutting conditions. Therefore, YG or YW type carbide inserts with high flexural strength and good impact resistance should be considered. The cutting speed is high, YT type alloy with good red hardness and high wear resistance should be selected, and YT type material with high wear resistance should be selected for the guide block. For the processing of general alloy steel, all the tooth materials should choose a comprehensive material, currently using YT798.

2. Selection of cutter specifications The cutter specifications are mainly selected according to the cutting load of each cutter during the cutting process, and the cutting load is related to the cutter width. The cutter width should be based on the cutting state of each cutter and the drill. The size of the diameter is assigned. The tooth width distribution should meet three conditions: a. Ensure the eccentricity of the drill tip e=(0.1~0.2)d0. The value of e is related to the material to be processed and the diameter of the drill. The size determines the size and direction of the radial force of the drill. A reasonable amount of eccentricity causes a moderate radial force to be pressed against the machined hole wall to stabilize the drilling, strengthen the guide and improve the surface quality of the hole. At the same time, the zero cutting of the drill tip is avoided, and the bad cutting conditions at the core are improved; b, A+C+e+F>d0/2+(1~2) mm, that is, there must be a certain overlap between the teeth. Quantity; c, A+CeF>(1~3)mm, which can make the cutting radial force always press the guiding block, the guiding block is pushed forward against the processed hole wall, fully utilize the guiding action of the guiding block to ensure the depth Straightness of hole drilling.

3. the tool angle selection principle The angle of the deep hole machining tool is mainly determined according to the workpiece material. A reasonable tool angle is very helpful in ensuring the stability of the drilling process, chip breaking and improving tool durability. The rake angle and the back angle of the tool are the most important angles. Generally, the rake angle of each cutting edge is γ0=00, the difficult material is γ0=1~30, and the material with good workability is γ0=3~60, brittleness and chilling property. The material can take a negative value; the outer blade back angle is generally taken as α0=8~120, and the inner edge should be larger, taking α0=12~150.