Nc milling process bearing parts analysis
In XK712 on the nc milling machine processing figure X1 shows parts, materials for Q235B, blank feet long x width × high for (70 ㎜ × 58 ㎜ x 11 ㎜).
cnc milling technology

Process analysis are as follows:
1,drawing process analysis
The main parts by plane, protruding sunken face the bearing of curve, including hole hole in the system for the surface roughness of the Ra1.6, two plane for Rc1.6; The parts for Q235B aluminum alloy steel, cutting processing good performance. Figure attached parts, parts processing process card see the second quarter.
2, determine the clamping plan
According to the structure characteristics of the parts, choose vises clamping. Jaw with two parallel is the machine tool clamping fixture, its main purpose is to rely on two mining face to keep the parallel degree, vertical degree of tolerance requirement, which can quickly clamping process ensure parts processing precision.
3, sure processing order
In the processing of the parts I is according to the principle of first rough then essence determine processing order, drilling, milling, milling plane along the rough around the bearing and the precision milling around half and the peripheral milling machining and along the grooves, rough machining milling bearing housings finish machining groove.
4, the choice of the cutting tools
Plane and the peripheral milling rough machining bearing the rough machining Φ 10 flat to knife, milling around half the bearing the Φ 4 flat finish machining knife, milling around the outside the bearing precision Φ 2 flat to knife, bearing the rough machining milling groove Φ 8 flat to knife, milling machining the groove of the
housing Φ 2 flat to the knife. The selected tool processing surface table 2 mold cavity of processing cutting tool bearing module
Table 2-2 housing module processing cutting tool of cavity
Product coding XXXXX parts coding XXXX processing drawing number X1
Product name XXXXX parts name cavity mould the bearing
Serial number processing cutting tool surface note
No knife knife long/specification name number ㎜
1  T01 Φ 10 high speed manual twist drill 1 30 housing the handle Φ 10 hole drilling
2  T02 Φ 10 high speed steel paper mill cutter 1 20 plane milling and rough machining housing around outside
3  T03 Φ 4 HSS vertical milling around 1 20 along the half finishing
4  T04 Φ 2 carbide cutter 20 milling around 1 outside along the finishing
5  T05 Φ 8 high speed steel paper mill cutter 1 20 milling housings grooves rough machining
6  T04 Φ 2 hard alloy 20 milling cutter groove of the bearing 1 finishing
Prepare XXX audit XXX in May were approved XXX 1 page page 1
5, cutting value choice
The parts material for aluminum alloy steel Q235, the cutting performance is good, the bearing model of milling  rough machining leave 0.15 ㎜ cushion to ensure appearance when finishing can work out meets the required size parts. Choose spindle speed and feed speed, the first check the cutting dosages manual “, determine the cutting speed, then according to the formula n = 1000 v/πd calculation to the data in the table into 5-2 cavity housingprocesses card module cavity.
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