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non standard fasteners

Categories：	Fabric / Cotton Fabric
Material & Specifications：	343434
Manufacturing methods：	Knit fabric
Weight(g/㎡)：	<80
Width(cm)：	110-120
Usage：	Apparel

Contact Infomation

metal stamping parts

Tel:	86-231-45678985
Fax :
Country/Region :	Algeria
Address :	A,Ouya avenue ,Xi'an,Shaanxi
Contact :	Armstrong Isabel ()

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Description: CNC machining each work procedure between the thickness of metal layer called resection by machining allowance. For outside cylindrical and hole and torsion, the machining allowance from the consideration non standard fasteners on the diameter, so called symmetric allowance (i.e., bilateral margin), namely the reality of the removal of metal.Precision parts processing method to the improvement of the rough surface.
In precision parts processing are the major factors influence the surface roughness of technology, cutting tool geometry parameter and cutting parameter. If you want to improve you need from this a few aspects:
1. The cutting parameter
Feeding, the greater the residual area of elevation, parts surface is rough. Therefore, reduce feeding can effectively reduce the surface roughness value. The influence of cutting speed on surface roughness is very Steel investment casting big also. When medium speed cutting elastic-plastic material, because of easy to produce product tumor crumbs, and plastic deformation is bigger, so processed parts surface roughness value is bigger. Usually with low speed or high speed cutting elastic-plastic materials, can effectively avoid the devolop tumor, and it has positive effect to reduce the surface roughness value.
2. The cutting tool geometry parameter
Main Angle in precision parts processing, deputy Angle and blade circular arc radius of workpiece surface roughness has a direct impact. To feed a certain case, point increase with the decrease of main partial and the auxiliary Angle or arc radius to reduce the surface roughness value. In addition, Appropriately increasing the rake Angle and back Angle, can reduce the cutting deformation and before and after the friction between the blade surface, inhibit tumor crumbs, also can reduce the surface roughness value.
The thickness is the half of the machining allowance on the diameter. Plane machining allowance is unilateral allowance, it is real the removal of metal layer thickness.
On the workpiece for machining allowance process on the goal is to socket screw plug remove to stay outside the processing deviation and shortcomings, such as casting chilling outside layer, porosity, sand inclusion, forging the scale, the decarburization layer outside, outside crack, after machining.
Outside stress layer and roughness, etc. The outside precision and roughness of the workpiece is to progress. Machining allowance of intrusive have significant influence on the processing quality and production efficiency.
If fine thread accuracy requirement high back rake Angle should be smaller (0 ° ~ 5 °), to make the right tooth type car.
It must be pointed out that with larger back threading tool rake Angle, in addition to the type of thread distortion, precision parts processing is turning will produce a large backward force of Fp. This force makes the tool to the workpiece in the trend, if the board with a ball screw.
Can produce large gaps between nut "Mr. Knife" (broach) phenomenon.
More common mechanical failure when the precision parts processing.
In precision parts processing process in addition to a small amount of Stainless steel foundry self-diagnosis function can display the fault, fault often cannot determine the specific reasons, most use our lists several common troubleshooting, for your reference.

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