The Guide Shaft is Widely Used in the Chemical Industry

Products name: Guide shaft

It’s used in machine

Material: stainless steel 316L

316L is a brand of stainless steel material, AISI316L corresponds to the United States brand, SUS 316L corresponds to the Japanese brand. China’s standard brand is 022Cr17Ni12Mo2(new standard), the old brand is 00Cr17Ni14Mo2, which indicates that it mainly contains Cr, Ni, and Mo. The number indicates the approximate percentage contained.

Chemical component

C: ≤0.030, Si: ≤1.00, Mn: ≤2.00, S: ≤0.030, P: ≤0.045

Cr: 16.00~18.00, Ni: 10.00~14.00, Mo: 2.00~3.00

Resistance to corrosion:

316L has a wide range of applications in the chemical industry because of its excellent corrosion resistance. It also is a derivative of 18-8 type austenitic stainless steel, with added 2~3% Mo element. The Mo content of stainless steel 316L makes the steel have excellent pitting resistance and can be safely used in environments containing Cl- and other halogen ions. The main application is the chemical properties of 316L, so steel factories have slightly lower surface inspection requirements for 316L compared to 304. If customers have high requirements the surface inspection should be strengthened.

Mechanical property:

Tensile strength σb (MPa):≥480

Offset yield strength σ0.2 (MPa):≥177

Elongation δ5 (%):≥40

Percentage reduction of area ψ (%):≥60

Hardness: ≤187HB;≤90HRB;≤200HV

Density: 7.98g/cm3

Specific heat ratio:(20℃0.502J/(g*K)

Processing technic

The quantities of tools:8 tools

Tool type: 

∅1.6 enter drill, 45° round turning tool, 2mm grooving cutter, 1mm grooving cutter, ∅2.8 drill bit, ∅2.98 reamers, ∅3 butt mill, ∅10 butt mill

According to the analysis of the parts drawing, the difficulty of this part lies in the part of the rotating body and the part of the feature surface and key groove 16×4×2.5. It is necessary to complete the processing of these parts in the same tooling to ensure the accuracy of the parts, so decided that the parts should be used turning and milling compound machining center to complete the processing of this part. Make use of center size ∅1.6-60° to tail-top machining to ensure that the parts have enough rigidity.

45° round turning tool and ∅1.6 center drill to process center hole of ∅1.6-60°

The length of the blank extends out to 180mm to make the ∅30 part characteristic, ensuring that there is enough safety distance between the spindle and the gripper to avoid damage to parts and equipment caused by collisions during the processing.

Use 45° round turning tool rough and finish machining excircle of ∅30,∅15, and ∅12e7.

Use 1mm and 2mm grooving cutter to process groove that the size is ∅9.1h9*2.5 and ∅9h11*1.15

Use ∅2.8 drill bit and ∅2.98 reamers rough machining and finish machining ∅3N7 hole. Use ∅3 butt mill machining key groove 16×4×2.5, then use ∅3 and ∅10 butt mill to promote machining thickness 25.5mm,21.5mm, and R2 characteristics of the position. Then cut off the total length of the parts with a 2mm grooving cutter and leave a margin of 0.5mm, finally, turning the processing total length 150mm.

Please refer to the finished parts below:

 

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