Push-broaching molding process of gear part of ring gear

Abstract

The invention discloses a push-broaching molding process of a gear part of a ring gear. The process sequentially comprises the following steps that: (1) firstly a ring gear billet which is horizontally arranged is located and mounted on a worktable; (2) set push broaches are sequentially and vertically mounted on a pressure head respectively, wherein, the push broaches and the ring gear billet are coaxial, small ends of the push broaches are positioned on the bottom ends thereof, and big ends of the push broaches are positioned on the upper ends thereof; and (3) in the case of push broaching,the direction of thrust of the pressure head acting on the upper ends of the push broaches is consistent with the motion direction of the push broaches, the descending speed of the push broaches is 8-10mm / s, and the ascending speed of the push broaches is 14-18mm / s, wherein, (3.1) a push broach No.1 is adopted for locating and push-broaching the gear part under a cooling condition; (3.2) a push broach No.2 is adopted for push-broaching the gear part for rough molding under a cooling condition; and (3.3) the push broaches No. 3, 4, 5 are sequentially adopted for push-broaching the gear part for precision molding under a cooling condition. The adopted push broaches have short axial size and good rigidity, thus the push-broaching molding process has the advantages of fast push-broaching speed, stable quality and high production efficiency; and short stroke is required for the pressure head of a press machine in the push-broaching molding process, thus the press machine is easily purchased.

Description

technical field [0001] The invention relates to a metal cutting technology, in particular, the invention relates to a technology for realizing the shaping of the tooth part of the inner ring gear in the form of pushing. Background technique [0002] The ring gear installed on the wheel side of the rear axle of a heavy-duty vehicle is a transmission part that bears heavy loads and is a key component in the transmission system of the vehicle. The technical requirements of the inner ring gear are high, and the manufacturing is difficult, and the design requirements must be met through precision cutting. The main structural feature of the internal ring gear is a thin-walled ring, and the inner wall of the ring is provided with teeth. The existing technology for manufacturing internal gears is usually produced by a slotting process. The slotting process is a kind of metal cutting process with low production efficiency. Under normal circumstances, it takes 60-70 minutes to proces...

AI Technical Summary

Problems solved by technology

For example, broaching an internal ring gear with a diameter of Φ200mm and a modulus of 4mm requires a broach with a length of about 3m to reasonably share the cutting amount, and it is very difficult to manufacture a broach with a length of 3m. Large, the broach itself has poor rigidity and low strength, and the ultra-slender broach cannot be used for production at all, and there is no broaching machine with a 3m long broach on the market

Therefore, the broaching process is not suitable for making large-diameter, large-modulus internal gears, but only suitable for broaching small-sized, small-modulus internal gears

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