Bolt detection is divided into two types

Update:03-05-2018
Summary:

Bolt detection is divided into two types, artificial an […]

Bolt detection is divided into two types, artificial and machine. Labor is the most primitive and most commonly used consistent detection method. In order to minimize the outflow of defective products, the general production company personnel conduct inspections by visually treating the packaged or shipped products to eliminate defective products (bad including dental injuries, mixed materials, rust, etc.).
Another way is automatic detection of the machine, mainly magnetic particle inspection. Magnetic particle flaw detection is the use of the interaction between the leakage magnetic field at the bolt defect and the magnetic powder, and the magnetic permeability and the permeability of the steel against the possible defects of the bolt (such as cracks, slag inclusions, mixed materials, etc.). These materials are not continuous after magnetization. The magnetic field at the place will undergo a catastrophic change, forming a leakage magnetic field at the part of the magnetic flux leaking at the surface of the work piece, thereby attracting the magnetic powder to form a magnetic powder accumulation at the defect—a magnetic mark, and under proper lighting conditions, the position and shape of the defect will be revealed. The accumulation of these magnetic particles is observed and explained, and the purpose of rejecting defective products has been achieved.

Fasteners are also called screws, but they are not the same as their names, but their internal meaning is the same. Each type of fastening fastener is a generic name for a type of mechanical part used when fastening two or more parts (or components) into a single unit. There are several aspects of standards that must be covered in fastener products.
1. Standards of fasteners in terms of size: Specifies the basic dimensions of the product. Socket head cap screwsThreaded products also include the basic dimensions of the thread, thread finish, shoulder clearance, undercuts and chamfers, and ends of externally threaded parts. Size and other aspects.
2, the fastener product technical conditions standards. It mainly includes aspects of product tolerances, mechanical properties, surface defects, surface treatments, product testing standards, and corresponding specific regulations.
3, screw product acceptance inspection, marking and packaging standards: specify the product inspection and acceptance of the project quality standards and sampling plans, and product labeling methods and packaging requirements.
4. Marking methods for standard parts, fasteners, screws, screws Standards: Specifies the complete marking method for the product and the simplified marking method.
5, fasteners in other aspects of the standard: such as the standard terms of fasteners, fasteners product weight standards.