Connecting rod vision automatic recognition method based on connecting rod forging detection line equipment

Abstract

The invention provides a connecting rod vision automatic recognition method based on connecting rod forging detection line equipment. The recognition method comprises the following steps of a step S1,detecting positions of a connecting rod forging part through a diffuse photoelectric sensor installed on a camera bracket, receiving positioning determined by the diffuse photoelectric sensor by using a PLC industrial personal computer, and using a VE camera connected with the PLC industrial personal computer to take photos for the connecting rod forging part; a step S2, using a linking rod visual automatic identification module arranged on the PLC industrial personal computer to record a type of a forging part and control equipment operation; a step S3, using the product type recorded in a step S211, combined with a step S214, to set forging product detection parameter characteristics; a step S4, using a product selection module of the PLC industrial personal computer to select a producttype determined by the step S3; and a step S5, detecting whether the forging product is qualified in a step S212 by using the PLC industrial personal computer. The connecting rod vision automatic recognition method has the advantages that feature points of workpiece can be accurately identified, external interference is shielded, and the stable detection effect is achieved.

Description

technical field [0001] The invention relates to the technical field of visual detection, in particular to a visual automatic recognition method for connecting rods based on connecting rod forging detection line equipment. Background technique [0002] The connecting rod is used to connect the piston and the crankshaft, transmit the force acting on the piston to the crankshaft, and convert the reciprocating motion of the piston into the rotational motion of the crankshaft. The connecting rod is composed of connecting rod body, connecting rod big end cover, connecting rod small end bushing, connecting rod big end bearing bush and connecting rod bolts (or screws). [0003] In order to facilitate later assembly and classification, each part will be stamped with a number during the production process. During the assembly process, the connecting rod needs to be paired with the number printed on each part. After the assembly is completed, the product number, batch number, and qual...

AI Technical Summary

Problems solved by technology

However, there are many shortcomings in manual inspection, as follows: (1) When inspecting a single product for a long time, the inspection workers' eyes are prone to fatigue, labor intensity is high, and they are easily affected by emotions, and the inspection results are difficult to guarantee; (2) The accuracy of manual inspection Low, the smallest defect that can be found by the human eye is a relatively large defect with obvious contrast, but it is difficult to maintain a continuous and stable visual effect by relying on human ability; (3) The speed of manual inspection is relatively slow, and in a short period of time It is difficult to check and complete a large number of production tasks. To solve the above problems, the Chinese patent: CN106964556A discloses a visual inspection system for connecting rod forgings to identify and detect connecting rod forgings. However, the recognition rate of the above-mentioned patent application in the factory is not high. Due to the complex environment in the forging workshop, the existing inspection cameras will be judged as unqualified if there is oil or other sundries at the feature points of the workpiece to be inspected, which is prone to misjudgment; it is not practical in the actual inspection process.