Crankshaft journal cone angle detection device and using method thereof

Abstract

The invention discloses a crankshaft journal cone angle detection device and a using method thereof. The detection device is mainly composed of two positioning plates, two dial gauge stands and two dial gauges; the dial gauge stands are fixedly installed on the front end side surface of the positioning plate; the dial gauges are fixedly installed on the dial gauge stands; the positioning plates are symmetrically arranged and fixedly installed together through a connecting rod; each positioning plate is open from the bottom, and provided with a quasi-circular groove; three supporting points arearranged on the groove surface of the quasi-circular groove and are respectively an adjustable supporting point arranged at the top of the quasi-circular groove, a movable supporting point arranged on the side of the dial gauge stands and has the pressing preload in the radial direction, and a fixed supporting point arranged on the opposite side of the movable supporting point; and an axial positioning block is further disposed on the outer side surface of one of the positioning plates. The device disclosed by the invention is simple in structure, small in measurement error and high in precision, can be used for rapidly and effectively detecting an angle line value of the journal cone angle, can realize online detection control, and the detection method is simple to operate and not influenced by human factors.

Description

technical field [0001] The invention belongs to the technical field of auto parts manufacturing, and relates to the machining of an automotive engine crankshaft, in particular to a crankshaft journal cone angle detection device and a use method thereof. Background technique [0002] The crankshaft is a key component of the transmission system of the internal combustion engine. During the working process, the thrust of the connecting rod is converted into a rotational force, thereby generating torque, and the heat energy generated by fuel combustion is converted into mechanical energy of mechanical rotation through the crank connecting rod mechanism. By assembling parts that transmit torque at the front and rear ends, the flywheel, torsional damper, pulley, timing gear, etc. are driven to drive other auxiliary devices. Part of the power output journal is designed with a conical structure, which is used for static fit and precise positioning. Using the principle of friction, a...

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Problems solved by technology

[0003] At present, the conventional detection of the cone angle is to use the three-coordinate detection, or usually use the indirect detection method of coloring. The method is to first uniformly coat a thin layer of red lead on the entire length of the processed journal cone angle. , and then put a standard taper hub on the journal, and turn the standard taper hub slightly, then remove the standard taper hub, and visually check whether the taper angle of the journal is painted red and whether there is any trace of contact with the inner hole of the standard taper hub , Whether it is fully matched, this method has a large detection error, especially when the thickness of the red lead is not well grasped, it will directly affect the detection result, instead of directly detecting the cone angle, the measurement method has low measurement accuracy and is affected by human factors Larger, and the three coordinates cannot be used for online detection

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