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1 Overview Bevel gear (commonly known as bevel gear) is a transmission part used to transmit power and motion between intersecting axes. Its main parameter names and codes are: modulus M, number of teeth Z, pressure angle n, big end taper L, tooth width b, pitch cone angle, tip cone angle 1, root cone angle 2. The tooth profile of the bevel gear is related to the above parameters.
2 Technical Fields (1) In the past, the processing of bevel gears on a planer was generally carried out by a forming method using a forming planer. Due to the low accuracy of the forming method, the machining has always been a difficult problem, especially the tooth profile processing of the bevel gear. With the development of science and technology, the technical requirements of products continue to improve, how to break through the traditional mechanical manufacturing mode, and produce high-quality, high-productivity and low-cost bevel gear products to meet industries such as: aircraft, automotive, smelting, printing, etc. The accuracy of the bevel gear in the transmission system. The wheel life is reduced.
(2) In order to solve many problems in the processing of bevel gears, improve the precision and efficiency of bevel gear machining to meet the needs of modern production, design and develop a new and efficient method of bevel gear machining - installation on bevel gear planer The transmission mechanism realizes the processing of the bevel gear by the profiling method of the walking plate. The development of this utility model design provides technical support for processing high-performance, high-quality conical gear products.
3 Determination of the overall scheme 3.1 The design of the profiling mechanism realizes the tooth profile machining of the bevel gear on the bevel gear planer. The profiling function of the tool is realized by the transmission mechanism of the machine tool. The mechanism is a composite mechanism synthesized by two mechanisms: one is driven by a motor to make a circular motion, and then the cam drives the connecting rod and the slider to convert the circular motion into a reciprocating motion, and the slider connecting the pulling rod drives the knife holder to complete the reciprocating cutting. The other mechanism rotates the table to move the knife holder out of the involute path along the tooth profile of the walking plate, and the tool holder and the knife mounted on the knife holder are also separated out. Line trajectory. Finally, through the compound movement of the two mechanisms, the involute tooth profile of the bevel gear is finally completed. The main view of the bevel gear profiling mechanism for the bevel planer.
3.2 The transmission mechanism is designed as a view of the A-direction of the bevel gear transmission of the bevel planer.
3.3 Design of the running plate 3.3.1 Firstly, it is necessary to determine the parameters M (big end), the number of teeth Z, the pitch angle, the circumference T, the pitch cone radius L, the pitch diameter d, the outer diameter De, the teeth of the bevel gear. Top height h1, root height h2, full tooth height h, angle between two axes (central angle) m, arc top thickness S, apex angle 1, root angle 2, tooth surface angle e, cutting angle i, tooth surface width b .
3.3.2 Relevant calculation formula (the angle between the two axes is equal to 90) M=T=dz; S=1.5708M; tg1=h1L; tg2=h2L; e=1; i=-2; b0.35L; Z=dM; L=d2sin; e=M(z 2cos);hi=Ltg1;h2=Ltg2
3.3.3 Determining the relevant data According to the requirements of the field equipment, the tooth plate should be designed first to determine the parameters: the machine cone radius L, the radius of the pitch circle after expansion rf, the radius of the tip circle, the radius of the root circle ri, the base circle Ro=rfcos (for the pressure angle).
3.3.4 The profile of the tooth profile of the toothed plate is marked with a bevel gear D/P=43, M = 33.8667, L=1400, Z=19, =20, =255827, 1=23823, 2= For example, the 3311 design is a tooth profile diagram of the walking plate.
4 Conclusions (1) Using the data provided by the walking plate of the mechanism, the bevel gear processed by the profiling function of the bevel planer solves the problem of low precision of the bevel gear, large tooth shape error and unstable transmission in the traditional machining mode. .
(2) Using the data provided by the walking plate of the mechanism, the bevel gear processed by the profiling function of the bevel planer meets the requirements of modern production, improves the processing precision of the bevel gear and the efficiency of the bevel gear processing, and produces high performance. High-quality bevel gear products provide technical support.