1. Plane layout of carburizing press quenching production line
Figure 5 shows the planning of a conventional furnace. The main components are a rotary hearth furnace for carburizing, and a conventional quenching press for quenching heated parts. Since the conventional press is oil quenched, the next large component cleaning machine is used to wash away the oil on the surface of the part. The workpiece is then transferred to a tempering furnace for tempering. A part transfer system is also required between these component devices.
2. Planar layout of the molded induction hardening line
First, the number of devices has been reduced (as shown in Figure 6), with only a rotary hearth furnace and a new induction hardening device. Since induction hardening is quenched with water-based quenching liquid, the workpiece after heat treatment does not need to be cleaned, and the washing machine can be removed. The second device to be removed is a large, expensive tempering furnace. The tempering process can now be carried out in a new process without the need for additional equipment or energy. The built-in sensor not only heats and quenches the part, but also heats the temper without any change, but with different power.
Therefore, the reduction in the number of processes and the cancellation of the intermediate transfer system can improve the amount of control of the programming, so that the failure rate is reduced. The core of the new process includes sensors, upper and lower die sets and calibration mandrels, which can be mounted on the standard induction hardening machine of EMA Induction Technology Co., Ltd., as shown in Figure 7.
4. Suitable parts for application
(1) Sleeve.
(2) Gear (circle).
(3) Synchronization circle.
(4) Bevel gears.
(5) Couplings.
(6) Any high precision cylindrical part.
V. Conclusion
This paper introduces a completely new process that combines the advantages of induction hardening and press quenching to achieve high-precision workpieces that reduce or eliminate subsequent processes over a large range.
The core unit is a new induction hardening machine with a molded quenching unit and a complete sensor system. The induced energy can be used to heat the workpiece and then die-hardened. It can also be used for tempering, which allows the part and the core mold to be relatively freely loaded and unloaded without any wear on the surface.
No washing machine or tempering furnace is required for the entire machine or production line.
references
[1] Heess K. et al. Ma ? - und Form nderungen infolgeW ? rmebehandlung. Expert Verlag, Renningen 2007.
[2] Benkowsky G. Induktionserw rmung. Verlag Technik GmbH, Berlin 1990.
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Roller bearing, one of the two members of the class of rolling, or so-called antifriction, bearings (the other member of the class is the Ball Bearing). Like a ball bearing, a roller bearing has two grooved tracks, or races, but the balls are replaced by rollers. The rollers may be cylinders or truncated cones. Only radial loads (i.e., loads perpendicular to the axis of rotation) can be carried when the rollers are cylindrical, but with conical rollers both radial and thrust, or axial, loads (i.e., ones parallel to the axis of rotation) can be carried. A needle bearing has cylindrical rollers that are relatively slender and completely fill the space between the races; in many cases the inner race is dispensed with. Because there is line contact between a roller and the races, while in a ball bearing there is point contact, in a given space a roller bearing can carry a greater radial load than a ball bearing.
Roller bearings are used in all main shaft and auxiliary drive shaft applications to support pure radial load, and allow for axial shaft elongation due to temperature changes with no additional load effect on the bearing. They are usually located at the ends of the turbine and compressor shafts and are often mounted in a housing, but separated from it by a layer of pressurized oil known as a squeeze film damper.
In many cases, instead of having a separate inner race for roller bearings, the [inner race" is an integral part of the shaft or stub shaft. This reduces complexity, weight, and build-up of concentricity tolerances. Overall, this is cost effective, but the cost of replacement or repair is likely to be higher than for separate inner races.
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