196results about How to "Good hardening effect" patented technology

A power generating unit consists of an internal combustion engine (1) and a generator (2), the former comprising a crankshaft (8) received in a crankcase (5) and the generator comprising a generator housing (20) connected to the crankcase (5), a stator (36) and a rotor (30) that is connected so as to rotate with the crankshaft (8). The aim is to provide a power generation unit that requires little space and that allows a precise guidance of a rotor designed for the overall unit power. A concentric stub shaft (11) is fixedly connected at the one end to the crankshaft (8) and at the other end to the rotor (30). The generator housing (20), on its side facing the internal combustion engine (1), has a front plate (21) that accommodates a bearing (23) for the sub shaft (11). The rotor (30) is otherwise overhung.

The invention provides pure titanium or a titanium alloy and a surface hardening method thereof. The pure titanium or the titanium alloy comprises a base material made of the pure titanium or the titanium alloy; three layers of oxidized hardened layers are arranged on the surface of the base material; the three layers of oxidized hardened layers comprise a surface transparent oxidized layer, an outer dispersion layer and an inner dispersion layer from outside to inside respectively; the surface hardening method of the pure titanium or the titanium alloy comprises five steps of vacuumizing, heating, hardening, dehydrogenating and cooling. The surface of the pure titanium or the titanium alloy subjected to hardening treatment has uniform, white and bright color and luster and has no color change condition; in the surface hardening method of the pure titanium or the titanium alloy, vacuum oxygen permeation hardening is adopted, and hydrogen gas is introduced in an oxygen permeation hardening process simultaneously, so that the hardening effect is improved; the hardening method is easy to control and a good appearance can be obtained.

The invention discloses a multi-point male die liquid-filling drawing forming device and a multi-point male die liquid-filling drawing forming method for a plate, relates to a device and a method for forming thin-walled curved plate parts, and aims to solve the problem of difficulty in forming of thin-walled and deep-cavity parts with complicated curved surfaces. A plurality of small punches are independently arranged; the upper ends of the small punches penetrate into through holes in a male die body; the upper end of each small punch is connected with a linear driving device; a female die is a semi-closed cavity of which the upper end is opened and the lower end is closed; an elastic base plate and a metal protection plate are superposed on the upper end surface of the female die from bottom to top. The heights of the small punches are adjusted to realize the construction of an outer contour of a multi-point male die; a to-be-formed plate blank, the elastic base plate and the metal protection plate are sequentially arranged on the upper end surface of the female die; a blank holder moves down to be assembled with the female die, and the multi-point male die moves down and applies a drawing force to the to-be-formed plate blank; meanwhile, a liquid medium is filled into an inner cavity of the female by the aid of a pressurizing system until drawing is completed to obtain parts of a required shape. The device and the method are used for forming the plate, and the thin-walled and deep-cavity parts with the complicated curved surfaces can be formed.