Core punching process of punching 26, noisy work. Cold stamping belongs impact work, once for each punch, make a noise issue. Punching workshop is one of the hardest hit noise nuisance. 7, punching speed, pressure, prone to injury. Due to the long mold manufacturing cycle and high manufacturing cost, when the small number of parts, cold stamping process is not economical. Only when mass production, mold manufacturing costs on the cost of the work is very small, cold stamping process became economical and reliable processing methods. Type core punchings core lamination according to different shapes, punching into a circular core punching, fan-shaped punching and poles (spade) punching. In the small AC motors and DC armature iron core are usually circular punching. DC motors and synchronous motors pole core common pole lamination press fit together. Punching core of technical requirements, the size of the bad design to meet the requirements. There are a variety of sizes on core salt tablets, but can be attributed to the internal dimension and with the size of two kinds. Internal dimensions as groove dimensions, vents, and other markers of various aperture and grooves on the pole punching, the general accuracy class H10, higher precision is unnecessary. Because the installation error groove wall and the wall of the hole caused by the irregular punching is much larger than the error itself. To fit with the size dimensions, such as the outer core, inner core circle and the shaft hole or the like with the other parts, the precision level and the process used about. 2, form and position deviation should meet the design requirements. Coaxial with the outer circle shall not exceed the difference between the stator lamination. When scheduled for punching and outside the circle for the first time while punching, its concentricity take 0.04-0.06mm, when it is due to internal and external punched twice, it may be appropriate to relax the concentricity. 3, alveolar to be evenly distributed. Groove indexing to be accurate, the difference between the maximum and the minimum width of the teeth should meet the design requirements. Otherwise, it will lead to an imbalance of the magnetic circuit. 4, punching uniform thickness, almost the entire surface, and punch small burr on the cutting. Burr on small motor stator punching sheet should not exceed 0.05mm. Cast aluminum rotor punching burr should not dry 0.1mm. 5, the insulating layer on the surface should be thin and uniform punching, good dielectric strength, oil and moisture resistant. Punching process of punching an iron core, cut core material manufactured by punching the first step is to cut the material, which is the whole of silicon steel plates cut strip of a certain width, or the entire volume of electrical steel field a certain width of the strip. Strip or strip width should be slightly larger than the outer diameter of the core laminations for punching.

  32, punching manner as the use of different types of dies, punching way a single punch, punch and complex progressive punch three. Therefore, punching process of punching a single formula also notching, notching and retest multi-position progressive style punching and the like. Punching punching way mainly determined by punching the structure and types of production. A single type notching that is equipped with a single punch punch punch slot machines or high-speed, fixed on the positioning device driven stator or rotor blank by the indexing mechanism, turn out of the trough. Punching trough aliquot of accuracy depends on the precision and accuracy of the positioning of the blank Notching machine aliquot of the institutions. When the red stator slots, common shaft bore and keyway slot positioning or turning and positioning mark. After use a high degree of targeting trough decile positioning error is small, but lower productivity. Unitary production efficiency is mainly determined by notching notching speed. High Speed Notching machine worm cam indexing mechanism indexing speed precise notching, punching a small punching sheet can be washed 1000-1500 times per minute. Notching unitary structure is simple because the slot die easily manufactured in different sizes and punching punch sheet adjustment convenient for punching varieties and quantities less punching. B dual flush tank that is equipped with a complex die out punch, a step trough all the stator or rotor slots, and sometimes at the same time out of the other parts. Small asynchronous motor stator and rotor laminations full circle usually take two or three-step process of punching, punching the stator inner circle and outer circle are generally punched simultaneously in the same process, in order to ensure its concentricity. Regardless of the sector can step punching, punching a complex formed. Duplex notching high production efficiency, precision punching good, but more complex suitable for mold manufacturing sector punching and punching large quantities of full circle punching. C multi-position progressive punching system that is installed in high-speed automatic punch multi-position progressive die, with a roll of continuous feed at several stations on the red revolution in the development of the child and punching. Multi-position progressive die structure complex and precision and service life requirements more stringent, mold manufacturing complex, high-efficiency punching, commonly used in high-punching centers 160mm and below the mass production of small asynchronous motor laminations.