What are the common metal fabrication methods？

Metal fabrication refers to the production activities of human beings to process materials with metal properties, which are mainly metal elements or metal elements. The progress of human society is closely related to the processing and application of metal materials. What is the method of metal fabrication? Next, let's introduce it.

What are the ways?

Grinding

Method for rotating a tool to perform a metal fabrication surface at a higher linear velocity

Features:

High precision, small surface roughness

The grinding wheel has a self-sharpening effect

High grinding temperature

Surface deformation strengthening and residual stress are severe

Turning

Cutting metal fabrication method with workpiece rotation as the main motion and turning tool performing feed motion.

Features:

Easy to ensure the positional accuracy of each machined surface

High productivity

Lower production costs

Wide range of materials for turning

Milling

Metal fabrication method with cutting motion as the main motion and workpiece or milling cutter as cutting motion

Features:

High productivity

Vibration is easy to happen

Good tooth cooling conditions

Processing accuracy is generally IT8 ~ IT7, surface roughness Ra value is 1.6 ~ 3.2mm

Drilling

A method of drilling a tool relative to a workpiece and performing an axial feed motion with holes in metal fabrication

Features:

Drill bit easy to lead

Difficulties in chip removal

High cutting temperature

Low precision: general machining accuracy is below IT10, surface roughness Ra is greater than 12.5mm

Broaching

Method for axially moving inner and outer surfaces of metal fabrication workpiece under tension by broach

Features:

High productivity

High processing precision and low surface roughness

The structure and operation of the broaching machine are relatively simple

Broach is costly

It is impossible to broach blind holes, deep holes, stepped holes and obstacled outer surfaces. The broaching cannot correct the position error of the holes.

Gear processing

There are many methods for tooth metal fabrication, including hobbing, gear shaping, shaving, grinding, milling, gearing, combing, squeezing, grinding and caries, among which the first four methods are used. : hobbing, gear shaping, shaving and grinding

Tapping

Method for rough metal fabrication holes

Features:

Tap is a special tool for tapping

Drill holes are required before tapping. Since the cutting edge of the tap has a cutting action on the metal during tapping, the workpiece material is also pressed. As a result of the extrusion, the tap may be squeezed, chipping, breaking, and disordering of the workpiece may occur. Therefore, the diameter of the threaded bottom hole (ie, the diameter of the drill bit used for the bottom hole) and the depth are first determined according to different materials. Check the relevant manual or calculate according to the following empirical formula

Reaming

A method of finishing a roughened hole

Features:

Correct the residual deformation and tool marks in the previous process and improve the accuracy of the hole

The accuracy after reaming should generally reach IT9~IT7, which should not be lower than the precision after lathe processing.

Reaming should consider the diameter of the hole material hardness, dimensional accuracy requirements, surface roughness, reamer type.

The reaming cannot correct the position of the hole because it is multi-blade and squeezes at the same time.

Pupil

The boring tool rotates for the main motion, and the workpiece or the boring tool is used as the cutting method for the feed motion. Boring is mainly carried out on milling and boring machines and trampolines.

Honing

It is a special form of metal fabrication grinding, and it is an efficient processing method in finishing. It belongs to finishing process and needs to be based on grinding or fine grinding.

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