Cutting dosage is the important parameter that must decide before the machine tool is adjusted not only, and its are numeric and reasonable waited for the effect with having very main to machining cost of efficiency of quality, treatment, production. Alleged " reasonable " cutting dosage is to point to make full use of function of cutting tool cutting and performance of machine tool power (power, torque) , below the premise that assures quality, obtain the cutting dosage of tall productivity and low finished cost. Cutting dosage chooses a principle: The quality that can obtain a part asks (basically point to exterior surface roughness and treatment precision) allow next reaching to make full use of in machining complex intensity and tigidity a group of the biggest cutting dosage are chosen below machine tool power and the premise that develop property of cutting tool cutting. One, the element of the consideration when formulate cutting dosage 1. Cutting machines productivity to be in cutting treatment, 3 element Ap, F, V all maintains metallic excision rate and cutting dosage linear relation, namely among them either parameter increases one times, can make productivity raises one times. However as a result of cutting tool life restrict, when either parameter increases, 2 parameter must reduce other. Accordingly, when formulate cutting dosage, 3 element win optimal combination, right now tall productivity just is reasonable. Usually as far as possible preferential increase Ap, feed excises in an attempt to entirely mental allowance. 2. When machine tool power carries penetration of a cutting tool on the back to measure Ap and cutting speed Vc to increase, all make become direct ratio to increase to cutting power. Feed F is lesser to cutting power influence. So, when rough machining, answer to increase feed as far as possible. 3. Cutting tool life (the durability T of cutting tool) 3 element are opposite cutting dosage the size that cutting tool life affects, it is Vc, F, Ap by order. Accordingly, from make sure reasonable cutting tool life sets out, when affirmatory cutting dosage, should collect the back penetration of a cutting tool with spent large possibility to measure Ap above all; Choose big feed F again next; Beg a cutting speed Vc finally. 4. When processing precision work of exterior surface roughness, increase feed to will increase treatment surface surface roughness to be worth. Accordingly, it is the main factor that productivity restrains to rise when finish machining. Below better case, raise cutting speed Vc, can reduce exterior surface roughness to be worth; Ap of quantity of back penetration of a cutting tool is lesser to the influence of exterior surface roughness. The place on put together is narrated, dosage of logical choice cutting, should choose to use up generous to carry penetration of a cutting tool on the back to measure AP above all, choose a big feed F next. The AP with final firm already ground and F, allow in cutting tool durability and machine tool power brandish is chosen below the condition a reasonable cutting speed Vc. 2, the cutting dosage of the measure rough machining that cutting dosage makes, give priority to in order to improve manufacturing efficiency commonly, but also should consider economy and finished cost; The cutting dosage of semifinishing machining and finish machining, answer to be premise in order to assure treatment quality, and efficiency of cutting of give attention to two or morethings, economy and finished cost. 1.
Does back penetration of a cutting tool measure the choice: of Ap? ? of ā of of Yu of Ai of Kang of be angry of び of Jing commonplace divides the surplus that leaves next paths working procedure outside, the thick car surplus of the others is excised as far as possible, with making knife number the smallest; When thick car surplus when too big or the machining complex tigidity of treatment is poorer, criterion mental allowance is divided second or the excision after taking a knife several times. 2.
The choice of feed F: Can use calculative method or the value that investigate manual data to decide feed F. 3.
Does cutting speed Vc decide: really? Blow poisonous Tuo where knocking at the cutting speed VT that Qu place allows will calculate. Besides using computational method, practice often is pressed in production experience and concerned manual data choose cutting career. 4.
Power of desired result machine tool: η of Vc ≤ PE* / (1000Fz) M/s 3, the way that raises cutting dosage 1.
Use the data of new-style cutting tool with cutting better performance; 2.
Below the premise that assures workpiece machinery function, improve workpiece material processability; 3.
Improve cooling and lubricant condition; 4.
Improve cutting tool composition, raise cutting tool to produce quality. CNC Milling