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10 Things to Consider When Buying induction hardening machine for sale

Author: Steve

Oct. 07, 2024

10 Considerations When Selecting an Induction Heating ...

Induction heating has considerable advantages over other common heating methods in specific applications. Is yours one of those applications?

For more information, please visit TY-induction.

Induction heating offers many benefits to manufacturing processes because it is a rapid, energy-efficient, flameless method of heating electrically conductive materials. A typical system involves an induction power supply, workhead with a copper coil and a chiller or cooling system. Current flows through the coil to create an electromagnetic alternating field. When a conductive part is placed inside the coil, current is induced to run through it. Current flow combined with the resistance properties of the conductive part results in heat generation.

 

10 Selection factors to consider

 Your Part&#;s Material

Induction directly heats conductive materials such as metals. Nonconductive materials are sometimes heated with a conductive susceptor. Due to hysteresis, magnetic materials are heated more easily than nonmagnetic materials; consequently, nonmagnetic materials often require more power. Metals with high resistivity like steel heat quickly, while low-resistivity metals like copper or aluminum require more heating time.

Depth of Heating Penetration

The induced current will be most intense on the surface of your part. In fact, more than 80% of the heat produced in the part is produced on the &#;skin,&#; or surface. Consequently, larger parts and parts that require through-heating take more time to heat than those that are thin or small.

Operating Frequency

Lower-frequency, higher-power systems are generally suited for heating larger parts that require through heating. Lower-power, higher-frequency systems are often the right choice for surface heating. As a general rule, the higher the frequency, the shallower the heating of the part.

Applied Power

The output power of your induction heating power supply determines the relative speed at which your part is heated. The mass of the part, rise in temperature and heat losses from convection and conduction need to be considered. Often, the induction equipment manufacturer can help you make this assessment.

Rise in Temperature Required

Induction can generate a significant change in temperature, but, generally speaking, more power is needed to accommodate a significant temperature change and will impact your power-supply choice. The rate of temperature change also affects your power-supply choice. The faster the rate of change, the more significant the power requirement.

Coil Design

Your coil, which is generally water-cooled and made of copper, needs to follow the shape of your part and take the variables of your process into account. An optimal coil design will deliver the right heat pattern to your part in the most efficient way. A poorly designed coil will heat your part more slowly and deliver an improper heating pattern. Flexible coils are now available and work well with large parts and unique part geometries.

Coupling Efficiency

The part being closely coupled with the coil elevates the flow of current, which increases the amount of heat generated in the part. Coupling enables faster and more efficient heating, which can increase manufacturing efficiency. Poor coupling has the opposite effect.

Your Facility and the Footprint

Induction requires cooling from a chiller or cooling system. Lower-power systems generally require a compact water-to-air heat exchanger, while a higher-power system may require a larger water-to-water heat exchanger or chiller. Additionally, you will need space for the induction heating power supply and workhead. Generally speaking, an induction system will save considerable space over an oven, especially when you consider that the workhead can be placed a significant distance away from the power supply. Of course, you also need to be sure your facility can handle the amount of power the system requires.

Additional Heating Requirements

Will you need to measure and store heating data? Some induction solution providers can offer a full system that includes an optical pyrometer and temperature-monitoring software so such data can be recorded and stored. A comprehensive solution can lead to a smooth installation and start-up.

Industrial Expertise

Many induction manufacturers have expertise with certain applications, and if they&#;ve worked with your application, it will provide peace of mind. Additionally, some providers offer laboratory testing and a tailored system recommendation based on your heating requirements. This type of service takes the guesswork out of selecting a system and helps you account for the aforementioned factors.

In conclusion, induction heating has considerable advantages over other common heating methods. Buying the right system for your application&#;s needs and ensuring it meets any needs you may have for it in the future will help your company fully benefit. 

Note: This article was originally published as a cover feature in Industrial Heating (which has ceased publishing) via a submission from Ambrell. 

 

5 things you need to know before buying an induction ...

If you&#;re planning a kitchen upgrade, you&#;re probably also considering replacing your appliances. As a kitchen&#;s main purpose is cooking, changing your gas range or electric range is most likely at the top of your agenda.

Rather than replacing like for like or simply upgrading the gas or electric range you already have, there is an alternative that&#;s well-known for being an extremely fast and energy efficient way of cooking. That alternative is an induction cooktop.

There&#;s a lot to love about induction cooking, which I recently discovered when I tried an induction cooktop at Smeg&#;s test kitchen. I also got to test Smeg's portable induction cooktop at home . But before you invest, there are a few things worth knowing that will help you decide if it&#;s the right choice for you. 

1. Heat is transferred differently 

(Image credit: SMEG)

Contact us to discuss your requirements of induction hardening machine for sale. Our experienced sales team can help you identify the options that best suit your needs.

Unlike an electric cooktop that heats the cooktop surface itself, an induction cooktop works differently. Whirlpool explains that a copper coil under the cooktop creates electromagnetic energy and it is this magnetic energy that interacts directly with the cookware, rather than the surface of the cooktop. However, to work the cookware has to be induction-compatible &#; more on this later.

Induction cooking is therefore much quicker than using standard gas and electric cooktops as it skips the need to heat the surface &#; instead it goes directly to the cookware and minimal heat is lost between the cooktop and pans. This also ensures a fast and even cooking method, as the heat is evenly dispersed. 

2. You&#;ll need to change your pans

(Image credit: Shutterstock)

Induction cookware needs to be made of ferromagnetic material, such as cast iron, stainless steel, or carbon steel.

If you&#;re precious about your pans, you may have to ditch them in favor of induction-compatible cookware, which could be an additional cost you&#;re not expecting, so be sure to factor it in when buying an induction cooktop.

Induction cookware needs to be made of ferromagnetic material, such as cast iron, stainless steel, or carbon steel. If your current pans are made of aluminium, copper, or glass, you&#;re not in luck.

However, if you&#;re still unsure, check the underside of your pans. It should specify if they are induction-safe or feature a logo with four loops of wires. If that doesn&#;t help, grab a magnet and see if it attracts. If it does, you can continue to use your pans on an induction cooktop. 

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Top tip
Think about the size of the pans you use. Any part of the pan that extends over the induction ring won&#;t be heated, so use pans that are the same size as the induction rings. 

3. Cooking will be different

(Image credit: Shutterstock)

Whirlpool 30-inch Glass Electric Induction Cooktop: was $ now $ @ Home Depot
This 4-burner black induction cooktop has a rapid boil function to boil water fast, and can even notify you before it reaches the right temperature. It also offers a pan presence sensor and a hot surface indicator, along with flexible temeperature controls including melt, simmer and keep warm.

Using an induction cooktop is quite different from using gas. Firstly, it&#;s incredibly responsive and will heat up fast. If you're a tea-lover, you're in luck, as these cooktops can boil water in under a minute. This speed is because the pans are heated directly, saving on the stage of heating a hot plate or the energy loss through the lack of direct contact. It&#;s a similar case when you want to turn the heat up or down, as the change in temperature is instant. There&#;s no issue of pans boiling over while the temperature adjusts. 

However, if you like to be hands-on in the kitchen and move, toss, and shake the pan&#;s contents, the heat transfer will be broken until you place the pan back on the cooktop. Also, if you&#;re used to completing tasks while waiting for oil or water in a pan to heat up, you won&#;t get the chance. Those onions will be ready to fry almost as soon as the oil hits the pan. 

4. The cost might put you off 

(Image credit: Shutterstock)

Induction cooking isn&#;t a cheap option, as the technology pushes up the price of appliances, and economies of scale probably have some impact, too, since gas and electric cooktops are still more popular.

Best Buy stocks induction cooktops that range in price from $699 for a  Thor Kitchen Built-In Electric Cooktop, to $6,619 for Vikings Profession 5 Series 36 inch Electric Induction Cooktop. While most of us won&#;t want to spend over $6,000 on an induction cooktop, you might want to budget somewhere between $1,000-$2,000.

However, induction cooking is cheaper than a gas or electric cooktop. According to Energy Star induction, cooking tops are 5-10% more efficient than conventional electric units and three times more efficient than gas.

5. Beware scratches, but spills are easy to clean

(Image credit: Shutterstock)

I tend to store pots and pans on my gas cooktop, but I&#;d have to change my behavior if I switched to induction cooking. Induction cooktops are made of glass, and we all know how easily glass can scratch. If you are used to banging your pots and pans down on top of your gas grates, you&#;ll have to be more careful with an induction cooktop and find another place to store your cookware. 

Having said that, although the surface will scratch more easily, it is flat &#; making cleaning super easy as there are no awkward nooks and crannies to clean around. And with more control over the settings, you&#;re less likely to have a boiled-over mess to clean up. A microfiber cloth should be all you need, and I&#;d recommend wiping it over after every use to prevent grease and residue buildup. We have more guidance here on how to clean a glass stove and a few tips on how to prevent scratches on a glass stove , plus 5 things you should never use to clean an induction cooktop. 

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