Advantages and Disadvantages of Powder Metallurgy Gears

Whether by weight or by quantity, the proportion of powder metallurgy (PM) and metal injection molding (MIM) gears is much larger than that of PM parts in other fields. Gears, ratchets and cams are all suitable for powder metallurgy, because, in terms of powder metallurgy and MIM gears, besides low cost and high production efficiency, there are also the following advantages.

(1) The dimensional accuracy of powder metallurgy gears produced in large quantities is uniform, especially when carbide die is used.

(2) Because of the porosity in the material structure, it is helpful for the gear to run smoothly and self-lubricate.

(3) Powder metallurgical gears with blind angle can be made, which can eliminate undercutting and retracting grooves when cutting gears. When making this kind of gear by powder metallurgy, special support is needed at the blind end.

(4) Gear can be combined with other shape parts, such as cam, ratchet, other gears, etc., and integrated production can be realized by powder metallurgy process.

(5) Bevel gears, bevel gears with equal diameter, helical gears and other special tooth-shaped gears can be made.

(6) Standard involute gears can be made, which is simpler and cheaper than other methods.

(7) The ratchet wheel, like the gear, is easily manufactured by powder metallurgy and MIM. Root cutting should be avoided, and large radius should be allowed at the top and root of teeth.

Powder metallurgy and metal injection molding have the characteristics of excellent surface roughness, uniform performance among parts and self-lubrication, which is especially advantageous for making gears and cams. Sintered cams with self-lubricating properties often have more durable surfaces than grinders. Powder metallurgy gears can be formed at one time, which not only saves cost, but also improves productivity.

Harbermetal is a professional manufacturer and solution provider of metal powder injection molding process (MIM) and PM process. We provide our customers with high volume structural, functional and appearance parts of various materials with high precision, complex shapes, good performance and exquisite appearance, and we have the ability to develop ceramic and titanium alloy materials to meet the needs of different types of customers. The company mainly provides all kinds of precise and complex hardware structure parts and components to worldwide enterprises in the fields of 3C consumer electronics, new energy, drones, medical devices, automobiles, aerospace, civil consumer goods …… etc.

Powder metallurgy has lots of advantages, such as material saving, energy saving, high efficiency, suitable for mass production, good size and shape repetition, low noise and low wear when gears are running etc., so it has been widely used. The main defects are impacting resistance and poor impact function. Therefore, it is very important to enhance its strength.

A. Strength characteristics of powder metallurgy gears

1. The expansion coefficient of materials and the accuracy of dies mostly depend on the accuracy of powder metallurgical gears. Generally, the domestic die for gear within 50 diameters is between 8-9 grades, while the imported die is between 7-8 grades. If it is helical gear, it can also be a higher grade. The greatest advantage of powder metallurgy gear is that it can be produced in large quantities and has good consistency.

2. For ordinary FN0205 powder metallurgy gear, it can carry torque up to 14NM, warm-pressed parts can reach 20NM, and warm-pressed FD0405 can reach 25NM. Therefore, in the case of professional powder metallurgy design, gears weight can still be reduced by 30-40%.

B. Increasing the strength of powder metallurgical gears

1. For high strength powder metallurgical gears, they should have high density and follow the process of “pressing-preheating-reheating-heat treatment”.

2. Lower carbon content can ensure that the product has high surface hardness and wear resistance in heat treatment. Low carbon will make the product have excellent impact resistance.

3. Adding 2%-3% Ni and 2% Cu into the material can obviously improve material impact strength after sintering.

4. Compared with carburizing and quenching, carbonitriding products have excellent wear resistance. Lower carbonitriding temperature guarantees parts core strength and reduces the quenching deformation.

Online Business and Internet Marketing Tips – How to Launch a Successful Google AdWords Campaign

Managing a Google AdWords campaign for your online business or Internet marketing venture can be stressful at first and also very intimidating. However, there are numerous methods to launch a campaign for marketing via the Internet without requiring tiresome duties or difficult processes.Leading pioneers like Perry Marshall have made many high revenues from his Google AdWords campaigns. He had made a step by step process on where success can be attained. Besides doing reading or going to seminars for a certain amount of time, you can do a few uncomplicated methods to uplift your campaign and expand your revenue power.There are 5 ways to ensure that the campaign produces very successful results for your online business or Internet marketing venture. These are:1. Use effective keyword tools. There are a lot of keyword tools or software that can be seen on the Internet. You do not really need to have a lot of money out and get the correct one needed for your campaign. An example of an effective tool for generating keyword ideas is Wordtracker where effective lists of keywords can support you with your campaign.2. You should be aware of what competing online businesses and Internet marketers are currently doing. In this kind of business, knowing what others have or are doing is a key to success. It is a big mistake if you have not taken advantage of keywords targeted by your competition. You can see which keywords have higher bids than others and how big they want to spend so they can assure safety from others like you.3. You should know how to use and implement advertising messages in an effective manner. AdWords advertisement can only have a few lines of text and a certain number of characters. It follows a certain limit. It requires you to have more space to be used effectively. The first 2 lines should inform your target audience of the benefits offered by your online business, products or services. These are on the left space lists. The remaining space should be used to communicate the unique benefits your target customers can gain from your Internet marketing business, products or services.4. Do not be content with just a 2nd ad listing page for relevant searches and publisher content. If you can, you should cut down your budget price before changing your bids. Lowering your bids will push back the most wanted spot on the second page where your ads would be visible.5. Go through a second advertisement. Testing what you have is another strategy in which Perry Marshall has tested for his Google AdWords Campaign. This is a test on which you could have answers in a more speedy way, instead of going with one ad.These online marketing and Internet business tips will optimize the benefits you gain from your advertising and marketing campaigns. Make sure to consult experts in the industry for more tips and strategies which have worked for them. Keep in mind that the same strategies, tips and techniques will never always give you the same results. This means brush up on your fundamental knowledge about offline and online business and marketing. Doing this will surely improve your chances of increasing your online business sales and Internet marketing profits.

The Importance of Workplace Safety Posters

Workplace safety posters play an important role in effective safety communications, safety precautions and safety warnings to workers. It is one kind of safety communication. Their applications in chemical industries are very common where various potential hazards present.

Safety regulations and legal require the use of workplace safety posters. Generally, these posters have to be placed in workplaces where hazards exist. They warn workers about specific hazards that accompany their jobs and naturally appear in such workplaces.

Government or Department of Labor in each country has may already established the required workplace safety posters. And in some cases, the government has prepared these printed posters that can be used directly.

When the safety regulation requires such posters application, there will be certain penalties or fines for violations. In general, the employers will be fined when workers get injured due to lack of safety posters as required by the regulations.

Some employers may think that these posters for workplace are only devoted for the workers or employees. But, actually they are wrong. These posters are purposed to protect both workers and employers.

Employers would not responsible for any incident happen in the workplace if they have applied the required posters. As an example is the usage of eye goggle. When the employers have displayed the poster of eye goggle according to the regulation, then when worker or employee gets injured by chemical splash without using eye goggle, the employer does not responsible. The reverse condition is also applied.

However, before displaying any safety posters in the workplaces, always bear in mind that these posters should be relevant, clear and to the point. Use only common words and communicative images or pictures to get workers’ attention.