Economy spline produces kind

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The tooth form of spline and other appearance has a lot of kinds of different treatment kind, all these treatment means have craft drawback. Be aimed at the spline of different type, can use special technology to have the treatment of different kind. When given spline public errand allows to use cold figuration technology, comparative other produces the treatment method that cuts bits, use cold figuration craft to have economy more (if pursue,1 is shown) . Use cold figuration craft to be able to realize shorter manufacturing metre, inferior cost of material especially, even crystal structure and higher exterior treatment quality are acquired in workpiece interior, these make cold figuration craft machines a respect to have an advantage more in spline. Graph the 1 model that introduces treatment of Leng Cheng craft the cold figuration technology that uses toothed segment to machine means is in chamfer of spline, oil groove, whorl, snap ring and roller flower machined a respect to reflect outstanding treatment result. If a spare parts is had a variety of afore-mentioned tooth form, means of this kind of treatment can be finished all or a variety of dentiform treatment, reduced pitch time thereby. Comparative generation cuts the treatment method of bits, the pitch time that uses cold figuration technology can reduce 30% ～ 70% . Additional, use cold figuration craft to be able to carry: Interior of tall spare parts is close to the tigidity that the metal of exterior area organizes, also be an advantage of cold figuration craft. Character of this kind of craft is mixed to the intensity of the spare parts of durability rising have positive effect, pass cold figuration craft to be able to obtain the exterior surface roughness of high quality especially. The craft of treatment principle cold figuration of cold figuration craft is change workpiece form in machining a process through accurate pressure, force workpiece material to produce method of a kind of treatment below pressure. Work of cutting tool impact is in-house, force workpiece material to flow to space of a definitive. The principle of craft of cold figuration of toothed segment form is two toothed segment make opposite motion, press gyral workpiece interior gradually. If the graph is shown 2 times, the principle of Leng Cheng craft showed 3 level of cold figuration process. Workpiece relies on fixed position of two activities tip, clamp; The Leng Cheng that two fluctuation synchronism moves rack at the same time from opposite two side clench the teeth works, above all Leng Cheng rack and workpiece lie grind level, finish while drive workpiece is placed boil press processing; After a few seconds, boil press working procedure to finish, debus workpiece, rack returns respective initiative position. Graph the principle of 2 Leng Cheng craft bears the weight of the athletic synchronism sex of two slip of toothed segment is very important, the athletic synchronism sex of slip is the main factor that affects spline to machine quality. Go up, the change that the change that next toothed segment are apart from crosses the influence the club to be apart from. The size of the workpiece diameter before rub ages also is another when affect treatment quality main factor. Rub ages used cutting tool has two toothed segment in the installation on the machine tool, to win the spline tooth form that workpiece asks, the tooth form of toothed segment and workpiece is different. Toothed segment divides into 3 different area: The 1st area is figuration area, the 2nd area is correction area, the 3rd area machines power division for progressively attenuation. In figuration area, the tine of toothed segment is progressively impact work is in-house (if pursue,3 are shown) . The tooth form that rub ages workpiece of cutting tool basis asks undertakes designing, on the machine tool that alludes like above can install a variety of cutting tool. Graph 4 showed have different length and dentiform cutting tool. The craft of advantage cold figuration of cold figuration craft is applied to especially accord with DIN 5480/ ISO 4156/ ANSI B92.

The spline of 2M standard and similar dentiform are machined, suit modulus particularly 0.

3 ～ the tooth form of 2. In addition, pressure angle should be more than 25 ° , small pressure angle has helix spline to be able to use technology of cold form cutting only. One of advantages with cold figuration the biggest technology are in spline extreme need not a larger area letting a knife, also won't resemble other craft, if use milling to machine craft, the meeting when treatment produces bigger root to cut. Use cold figuration technology, although the stage shoulder of tooth form and workpiece is very adjacent when, also can undertake machining. In process of cold form cutting, won't produce very big hot effect to workpiece, the temperature of workpiece is highest it is hand blessing namely. Workpiece temperature can undertake dropping in temperature through special cooling oil. To achieve the goal of environmental protection; Also can use minim to lubricate. Compare with photograph of other figuration craft, cold figuration craft need not use any cleaning measure, if phosphate is cleaned, need not install below most circumstance so clean craft additionally. Adopt the design of device of clamp of corresponding toothed segment, cold figuration craft can be machined complete a variety of tooth form, for example, finish the figuration of spline and whorl, if different spline has identical diameter and tooth form, these spline can be machined at the same time finish. If many spline and tooth form is different, can complete process of roller make friends early or late in be machined. According to the treatment plan with possible as above, a variety of tooth form can finish figuration of roller make friends, this reduced finished cost greatly. Cutting tool asks to design according to dentiform, use diamond emery wheel to undertake numerical control grinding is machined, so, the fabricating characteristics that any workpiece ask can pass the design of toothed segment to obtain. For example, with tiny helix angle comes spline of roller make friends, to assembling character, the clench the teeth of spline of inside and outside becomes more easy. The chiefest measure of cutting tool will surely be denied definitely use cold figuration technology, if exceeded definitive measure,limits cannot use cold figuration technology. The length of cutting tool decides according to the geometrical dimension of workpiece, the hardness that pledges like the modulus of spline, diameter and workpiece material and tensile strength. The craft of form of material qualitative Leng Cheng with cold figuration applicable craft basically.

Apply to the form cutting of material of all alloy steel, grey opening also can have below special situation the form cutting with cast-iron or aluminous qualitative material. Be answered by figuration material, have even crystal structure. Forge bucking makings should pass the processing of temper craft before roller make friends. Tensile strength is in 600 ～ the material between 800N/mm2 is optimum use technology of roller make friends. Below special situation, still can be achieved by the tensile strength of figuration material 1200N/mm2. The FEM imitate of cold figuration craft is passed finite yuan of analysis is OK the complex figuration process of craft of computational cold figuration. Study the process of cold figuration thereby, the geometry after the design that adopts corresponding toothed segment will improve workpiece roller press hard against each other is characteristic. Graph of the 5 tine in showing process of cold form cutting fashion a process. Can see from which, when should aging workpiece material of the center begins flow even, the in-house stress of every tine distributings also is basic and identical, and process of workpiece data flow is stabler, treatment quality is higher. The graph ages in process of 5 cold form cutting form so, in machining a process, should make workpiece material flows at the same time as far as possible, will form tooth form of hare auricular model in the coping of tine otherwise. Although deviation of major tooth form is inside the tolerancepublic errand limits of the requirement (if pursue,6 are shown) . The basis is finite yuan of analytic result, can reduce the deviation of typical tooth form in cold figuration process through amending tooth form, win the cold figuration tooth form of top quality thereby. The pitch time with the shorter economy of craft and longer toothed segment service life, make toothed segment pattern cold figuration craft is become extremely manufacturing shift of economy. In 600 ～ to tensile strength the material between 800N/mm2 pledges, the service life of cutting tool exceeds 100 thousand tooth form is likely. The hardness of toothed segment is very tall, can repeat for many times long grind. So the place on put together is narrated, a pair of toothed segment can be finished 500 thousand or more dentiform treatment. Additional, with use milling to machine craft photograph to compare, cold figuration craft has larger dominant position. It is to a 24 tine, modulus 1, the spline of long 50mm, with milling treatment craft is compared, if use cold figuration technology can the biggest reduce the handling time of 60% , finished cost can fall to 75% . CNC Milling CNC Machining