The special broaching machine for connecting rod bodies, connecting rod caps and bearing caps is mainly used for broaching joint surfaces, tooth surfaces, convexes, grooves, repeating surfaces and half-arcs of connecting rods, the rods are mainly positioned on two sides and by one pin, while the caps are positioned by face positioning and swing arm aligning devices. Clamps in master-slave structure are used, hydraulic control is adopted, and simultaneous broaching at multiple stations can be realized to achieve high work efficiency.
The special broaching machine for main bearing caps is mainly used for machining main bearing caps on cylinder blocks and made in structure of single slide carriage or double slide carriages. In the range of the nominal broaching force and the length of slide carriage stroke the broaching machine can broach two large planes, joint surfaces, arc surfaces and bolt surfaces and achieve simultaneous machining at multiple stations so as to improve the work efficiency significantly.
This broaching machine is driven by hydraulic system and operates stably, and can realize stepless speed regulation. The broaching machine is provided with various safety devices. Based on the accumulated experiences over the years, in the design of cutting tools combined alloy broaches are adopted on this broaching machine, and in broaching mode rough cutting is made first and then followed by finish cutting to meet the requirement for surface roughness of workpieces. Tool protective devices are installed in the front of broaches, when the broaching amount is more than the amount allowed by cutting tools, the broaching machine cannot broach, and the machining stations are also equipped with airtight detectors that can effectively control the machining risk of the broaching machine