加工基础-机械外文英文资料及翻译

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中英文翻译

二○○九　年　五　月　十　日

Introduction of Machining

Have a shape as a processing method, all machining process for the production

of the most commonly used and most important method. Machining process is a

process generated shape, in this process, Drivers device on the workpiece material to

be in the form of chip removal. Although in some occasions, the workpiece under no

circumstances, the use of mobile equipment to the processing, however, the majority

of the machining is not only supporting the workpiece also supporting tools and

equipment to complete.

Machining know the process has two aspects. Small group of low-cost

production. For casting, forging and machining pressure, every production of a

specific shape of the workpiece, even a spare part, almost have to spend the high cost

of processing. Welding to rely on the shape of the structure, to a large extent, depend

on effective in the form of raw materials. In general, through the use of expensive

equipment and without special processing conditions, can be almost any type of raw

materials, mechanical processing to convert the raw materials processed into the

arbitrary shape of the structure, as long as the external dimensions large enough, it is

possible. Because of a production of spare parts, even when the parts and structure of

the production batch sizes are suitable for the original casting, Forging or pressure

processing to produce, but usually prefer machining.

Strict precision and good surface finish, machining the second purpose is the

establishment of the high precision and surface finish possible on the basis of. Many

parts, if any other means of production belonging to the large-scale production, Well

Machining is a low-tolerance and can meet the requirements of small batch

production. Besides, many parts on the production and processing of coarse process to

improve its general shape of the surface. It is only necessary precision and chooses

only the surface machining. For instance, thread, in addition to mechanical

processing, almost no other processing method for processing. Another example is the

blacksmith pieces keyhole processing, as well as training to be conducted

immediately after the mechanical completion of the processing.

Primary Cutting Parameters

Cutting the work piece and tool based on the basic relationship between the

following four elements to fully describe: the tool geometry, cutting speed, feed rate,

depth and penetration of a cutting tool.

Cutting Tools must be of a suitable material to manufacture, it must be strong,

tough, hard and wear-resistant. Tool geometry -- to the tip plane and cutter angle

characteristics -- for each cutting process must be correct.

Cutting speed is the cutting edge of work piece surface rate; it is inches per

minute to show. In order to effectively processing, and cutting speed must adapt to the

level of specific parts -- with knives. Generally, the more hard work piece material,

the lower the rate.

Progressive Tool to speed is cut into the work piece speed. If the work piece or

tool for rotating movement, feed rate per round over the number of inches to the

measurement. When the work piece or tool for reciprocating movement and feed rate

on each trip through the measurement of inches. Generally, in other conditions, feed

rate and cutting speed is inversely proportional to。

Depth of penetration of a cutting tool -- to inches dollars -- is the tool to the work

piece distance. Rotary cutting it to the chip or equal to the width of the linear cutting

chip thickness. Rough than finishing, deeper penetration of a cutting tool depth.

Wears of Cutting Tool

We already have been processed and the rattle of the countless cracks edge tool,

we learn that tool wear are basically three forms: flank wear, the former flank wear

and V-Notch wear. Flank wear occurred in both the main blade occurred vice blade.

On the main blade, shoulder removed because most metal chip mandate, which

resulted in an increase cutting force and cutting temperature increase, If not allowed

to check, That could lead to the work piece and the tool vibration and provide for

efficient cutting conditions may no longer exist. Vice-bladed on, it is determined work

piece dimensions and surface finish. Flank wear size of the possible failure of the

product and surface finish are also inferior. In most actual cutting conditions, as the

principal in the former first deputy flank before flank wear, wear arrival enough, Tool

will be effective; the results are made unqualified parts.

As Tool stress on the surface uneven, chip and flank before sliding contact zone

between stresses, in sliding contact the start of the largest and in contact with the tail

of zero, so abrasive wear in the region occurred. This is because the card cutting edge

than the nearby settlements near the more serious wear and bladed chip due to the

vicinity of the former flank and lost contact wears lighter. This results from a certain

distance from the cutting edge of the surface formed before the knife point Ma pit,

which is usually considered before wear. Under normal circumstances, this is wear

cross-sectional shape of an arc. In many instances and for the actual cutting

conditions, the former flank wear compared to flank wear light, Therefore flank wear

more generally as a tool failure of scale signs. But because many authors have said in

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摘要：

中英文翻译二○○九　年　五　月　十　日IntroductionofMachiningHaveashapeasaprocessingmethod,allmachiningprocessfortheproductionofthemostcommonlyusedandmostimportantmethod.Machiningprocessisaprocessgeneratedshape,inthisprocess,Driversdeviceontheworkpiecematerialtobeintheformofchipremoval.Althoughinsomeoccasions,theworkp...

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