In order for the weld bead to be even and neat, absolutely dry electrodes are necessary. If the electrical conductor is wet or damp, it must be dried. Keep the electrodes in special cases, do not forget to inspect them before use, dry them and cook them if necessary in professional containers or in old household appliances.
- a What to ignite
- 1.1 In a chafing dish
- 1.2 Thermal boxes and containers for the storage of electrical conductors
- 1.3 Industrial electric ovens
- 2 Precautions for calcination and drying
What to ignite
Professionals use fixed or compact portable equipment. Self-taught masters try to save money and adapt old household appliances for drying.
In a chafing dish
For these purposes, you can use an old microwave or working oven. To perform the procedure correctly, you must:
- get acquainted with the technical characteristics of consumables, paying attention to information on the mode of calcination,
- arrange the electrical conductors on the microwave tray, close the door,
- set the temperature regime according to technical requirements, wait for the specified time,
- open the door, allow to cool,
- place the electrodes in an airtight container.
It is not recommended to heat the electrodes in a microwave oven which continues to heat food. It is dangerous to attempt to heat conductors in a gas oven with an open flame.
Thermal boxes and containers for the storage of electrical conductors
The most economical devices for professional use are compact portable pencil cases and boxes. They are suitable for storing, transporting and cooking electrodes.
Such devices will be useful for those who go to the sites with their equipment and work with manual arc welding. To achieve high-quality sewing and always have perfectly dried electrodes at hand, such a pencil case will be useful for every master.
A thermal box is an enclosure with a heating element, several settings and a temperature limiter, placed in a metal case. Between the chamber and the casing is a layer of heat-insulating material.
The device is powered by electricity. When heated, excess moisture evaporates from the coating of consumables. The standard container capacity is 5 to 10 kg.
If the heating cabinet is disconnected from the network, the thermal regime is maintained in it for some time. In such a device it is convenient to heat and store consumables, especially when you have to work outdoors on a rainy day.
Industrial electric ovens
Large-capacity stationary devices for annealing electrodes are designed for large storage volumes. They are made according to the type of cabinets, ovens or containers.
In large industries, special cabinets are used, in which from 100 to 250 kg of electrodes are placed. Small producers prefer to buy stoves or containers of 10 to 50 kg. The most budgetary are Russian-made models for 5-20 kg.
The heating equipment is powered by a 220V electrical network, has temperature and preheating time settings.
Precautions for calcination and drying
When trying to dry a wet electrode, remember the basic rules:
- no work may be carried out using open flames,
- you must read the manufacturer’s instructions and do not exceed the maximum calcination temperature,
- limit the contact of the electrodes with water, store in sachets or in professional thermal cases.
A smooth seam of manual arc welding is impossible without the use of a well-dried electrode. Therefore, the materials should be properly stored and ignited from time to time.