China National Heavy Duty Truck successfully developed CAPP management system

It was learned from China National Heavy Duty Truck that the group truck company successfully developed the CAPP management system, which shortened the preparation process time from one month to three to five days. CAPP technology made process design information possible.

CAPP, the computer-aided process design, is an important link between product design and product production. Before the final assembly process of the truck company, CAD, Word and other software were used to prepare the process documents. The efficiency is low and the effective retrieval, synchronization update and management of the process information are very difficult. Usually, it takes more than one month to compile a process. The CAPP management system realizes the process file editing with the product process structure as the core. The software consists of three modules: data maintenance, process preparation, process query and printing. Among them, the process is divided into 8 small modules, the technician can call different modules according to different workshops and models, and can also browse, query, summarize and print the process documents at any time.

Since the product process has great inheritance, a large amount of assembly process data is stored in the database in the form of a module, and the technician can directly call the data in the background data and modify it by simply performing some simple operations. A set of assembly processes can be programmed in 3 to 5 days.

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Linear Bearings
Linear motion is the most basic of all motion. Linear ball bearings provide linear movement in one direction.

A Roller Bearing, carries a load by placing rolling balls or rollers between two bearing rings called races. These bearings are comprised of an outer ring and several rows of balls retained by cages. Roller bearings are manufactured in two styles: ball slides and roller slides.

Ball Slides
Ball Bearing slides are the most common type of linear slide. They use self-lubricated ball bearings housed in the base. This arrangement offers smooth precise movement along a single-axis linear design. Typically constructed from aluminum, hardened cold rolled steel or galvanized steel, ball bearing slides consist of two linear rows of ball bearings contained by four rods located on opposite sides of the base, which support the carriage for smooth linear movement. This low-friction linear movement can be powered by a drive mechanism, by hand, or inertia. Ball bearing slides have a lower load capacity compared to other linear slides, this is because the balls are less resistant to wear and abrasions. Ball bearing slide applications include fragile instrumentation, robotics, cabinetry and appliances.

Roller Slides
Roller slides are non-motorized. Roller slides are based on linear roller bearings, which are frequently criss-crossed to provide heavier load capabilities and better movement control. They provide low-friction linear movement for hand-powered equipment. Roller slides are versatile and can be adjusted to meet numerous applications which typically include clean rooms, vacuum environments, material handling and automation machinery.

Consisting of a stationary linear base and a moving carriage, roller slides work similarly to ball slides, except that the bearings housed within the carriage are cylindrical shaped instead of ball shaped. The bearing races are "V" grooved, one being on the top carriage and the other on the base. Typically, carriages are constructed from aluminum and the rods and rollers are constructed from steel.

Although roller slides are not self-cleaning, they are suitable for environments with low levels dirt and dust. Roller slides are capable of providing linear motion on more than one axis through stackable slides and double carriages. Roller slides have a broader contact surface due to contact between the carriage and the base and resulting in less erosion.

Linear Bearing10 Jpg

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