A visual automatic recognition method for connecting rods based on connecting rod forging inspection line equipment

Abstract

The invention provides a connecting rod visual automatic recognition method based on connecting rod forging detection line equipment, the recognition method includes: step S1: using the diffuse reflection photoelectric sensor installed on the camera bracket to detect the position of the connecting rod forging, and then using PLC industrial control The machine receives the positioning determined by the diffuse reflection photoelectric sensor, and uses the VE camera connected to the PLC industrial computer to take pictures of the connecting rod forgings; uses the connecting rod visual automatic recognition module set on the PLC industrial computer to enter the forging model and control the operation of the equipment; steps S3: Use the product model entered in step S211 in combination with step S214 to set the detection parameter characteristics of the forging product; Step S4: Use the product selection module of the PLC industrial computer to select a certain product model determined in the above step S3; Step S5: PLC industrial computer Using the above step S212 to detect whether the forging product is qualified; the advantage of the present invention is that it can accurately identify the feature points of the workpiece itself, shield external interference, and achieve the effect of stable detection.

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.