plastic recycling pelletizing machines how to use high-frequency inductors screw
Core component of plastic recycling pelletizing machines screw, traditional screw quenching process, so that plastic recycling pelletizing machines shorten the life and increase maintenance costs. Zhangjiagang PURUI Plastic Machinery Factory production of plastic recycling pelletizing machines using high-frequency induction hardening screw with a long life, corrosion resistance, torque, etc. Features: metal parts high-frequency induction hardening material most induction hardening surface hardening process used in industry, have some surface induced current, rapid heating parts of the surface, and then quickly in metal heat treatment and quenching. Induction heating equipment, induction heating of the workpiece surface that is hardened devices. Induction heating principle: the workpiece into the sensor, the sensor input is generally intermediate frequency or high frequency alternating current (1000-300000Hz or higher) hollow brass. Generating an alternating magnetic field generated in the workpiece induced current, the induced current distribution in the workpiece is not uniform, strong frequency of the surface, but weak in the interior, close to the central portion 0, use of the skin effect, can be rapidly heated when a surface, the surface temperature reaches 800-1000ºC within a few seconds, while the heart is small temperature rise
Principle surface hardening treatment.
(A) the basic principles
Workpiece hollow brass sensor wound, which leads to an intermediate frequency or high frequency alternating current, the frequency of the induced surface currents, in the part surface or localized heating (in seconds rapid heating 800 ~ 1000 ℃, still close to the core portion room temperature) after a few seconds, immediately quick spray (DIP) cooling water (or injection cooling) completely immersed firefighting work, the surface hardness or partially meet the appropriate requirements. (The animation below shows)
Select (B) heating frequency
At room temperature, the surface of the induced current flow depth δ (mm) versus frequency current of a frequency f (Hz) between the increase in the hardenability of the current penetration depth of the lower layer decreases. Current frequency, commonly used are: 1, high-frequency heating: 100 ~ 500KHZ, commonly 200 ~ 300KHZ frequency heating pipes, hardened layer depth of 0.5 to 2.5mm, suitable for a small part. 2, high-frequency heating: current frequency is 500 ~ 10000HZ, using 2500 ~ 8000HZ, high frequency power supply for mechanical heating device or SCR frequency generators. Hardened layer depth of 2 to 10 mm. Suitable for larger diameter shafts, gear. 3, high-frequency heating: current frequency is 50HZ. Use mechanical frequency heating power, when the hardened layer depth of up to 10 ~ 20mm, the surface is suitable for large diameter hardened.
(C) the application of induction heating surface hardening
Hardening of the more common: 1, heating speed, scalable physical transformation temperature range, the transition time is short. 2, the surface of fine martensite hidden, higher hardness obtained after quenching (2 ~ 3HRC). Brittleness lower and higher fatigue strength. 3, when the post processing is not susceptible to oxidation and decarburization of the workpiece, the workpiece can be processed, or even some direct components. 4, case depth, the operation is easy to control, easy to implement mechanization and automation. Fifth, the flame surface hardening steel and carbon steel 35,45 carbon steel 40Cr, 65Mn steel, gray iron, alloy cast iron flame surface hardening. - Oxygen or acetylene gas - mixed oxygen gas burner flame jet rapid heating of the workpiece. After quenching temperature is reached, immediately cooling water surface.
Principle surface hardening treatment.
(A) the basic principles
Workpiece hollow brass sensor wound, which leads to an intermediate frequency or high frequency alternating current, the frequency of the induced surface currents, in the part surface or localized heating (in seconds rapid heating 800 ~ 1000 ℃, still close to the core portion room temperature) after a few seconds, immediately quick spray (DIP) cooling water (or injection cooling) completely immersed firefighting work, the surface hardness or partially meet the appropriate requirements. (The animation below shows)
Select (B) heating frequency
At room temperature, the surface of the induced current flow depth δ (mm) versus frequency current of a frequency f (Hz) between the increase in the hardenability of the current penetration depth of the lower layer decreases. Current frequency, commonly used are: 1, high-frequency heating: 100 ~ 500KHZ, commonly 200 ~ 300KHZ frequency heating pipes, hardened layer depth of 0.5 to 2.5mm, suitable for a small part. 2, high-frequency heating: current frequency is 500 ~ 10000HZ, using 2500 ~ 8000HZ, high frequency power supply for mechanical heating device or SCR frequency generators. Hardened layer depth of 2 to 10 mm. Suitable for larger diameter shafts, gear. 3, high-frequency heating: current frequency is 50HZ. Use mechanical frequency heating power, when the hardened layer depth of up to 10 ~ 20mm, the surface is suitable for large diameter hardened.
(C) the application of induction heating surface hardening
Hardening of the more common: 1, heating speed, scalable physical transformation temperature range, the transition time is short. 2, the surface of fine martensite hidden, higher hardness obtained after quenching (2 ~ 3HRC). Brittleness lower and higher fatigue strength. 3, when the post processing is not susceptible to oxidation and decarburization of the workpiece, the workpiece can be processed, or even some direct components. 4, case depth, the operation is easy to control, easy to implement mechanization and automation. Fifth, the flame surface hardening steel and carbon steel 35,45 carbon steel 40Cr, 65Mn steel, gray iron, alloy cast iron flame surface hardening. - Oxygen or acetylene gas - mixed oxygen gas burner flame jet rapid heating of the workpiece. After quenching temperature is reached, immediately cooling water surface.
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