Everything You Need To Know To Find The Best automated hydraulic press

         

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Back Jul 14, HOW TO PURCHASE THE BEST HYDRAULIC PRESS SOLUTION FOR YOUR APPLICATION
Today's hydraulic presses are faster, more reliable than ever and can do a wide variety of jobs within their tonnage range to provide excellent versatility. Hydraulic presses are also uncomplicated, and can have significant cost advantages over mechanical presses in comparable sizes. Moving parts are few, and they are fully lubricated in a flow of pressurized oil. These parts are usually standard, affordable, off-the-shelf components and are also relatively easy to replace. This means more up-time and lower maintenance costs.  Hydraulic presses also provide easy tonnage adjustment and more tonnage control throughout the presses&#; stroke, expanding your application possibilities.  If you decide to go hydraulic, here are some key factors to consider when selecting and buying your press.

Selecting Your Press Tonnage
One of the first things to consider when purchasing a hydraulic press is selecting the tonnage. Is the tonnage required to do a job the same for a hydraulic press as it is for a mechanical press? The answer is yes. There is no real difference. The same formulae are used to determine tonnage for both types of presses. The tooling is usually interchangeable. There may be certain applications such as deep drawing where the full power stroke characteristic of a hydraulic press reduces the tonnage, but there are no known instances where using a hydraulic press requires more tonnage.

Selecting press tonnage in the typical press room is often little more than guesswork. If, for example, a job is successful on a 100-ton mechanical press, it tends to stay there for the life of that job. The job may never have been tried at 75 tons or at 50 tons. With a hydraulic press, however, you can adjust tonnage quickly and easily, tuning the press to precisely the right tonnage for each specific job.

How The Press Affects the Job
Once the tonnage question is settled, it&#;s time to determine the effect of the stroke on the work. Is it the same as with a mechanical press? The answer, again, is yes in most cases. There are some specific limitations. Drop hammers and some mechanical presses seem to do a better job on soft jewelry pieces and impact jobs. The coining action seems sharper if the impact is there.

In deep drawing, however, the full power stroke of a hydraulic press produces significantly better results. Otherwise there are very few examples where the application of 100 tons of hydraulic force produces any significant difference in the character of the part given the same tooling.

Shear in the dies will reduce blanking tonnage for hydraulic presses in the same way it does for mechanical presses.

What Type of Press is Best for You
Now it&#;s time to determine which type of hydraulic press is best for your particular application. Open-gap presses provide easy access from three sides. 4-column presses ensure even pressure distribution. Straight-side presses offer the rigidity required for off-center loading in progressive die applications. One important thing to keep in mind: The more critical the work and the more demanding the tolerances, the greater the reserve tonnage capacity should be.
Once the basics are determined, the next thing to consider is options. Most hydraulic press builders offer a wide array of accessories. These commonly include:

• Distance reversal limit switches
• Pressure reversal hydraulic switches 
• Automatic (continuous) cycling 
• Dwell timers 
• Sliding bolsters and rotary index tables 
• Die cushions 
• Ejection cylinders or knockouts 
• Electronic light curtains and other devices 
• Touch screen controls
• Servo system feedback for precise, consistent, repeatable stroke control
  

Then you need to determine what type of quality you need to get the job done.  Quality can vary greatly from press to press. There are light-duty presses that are capable of "spanking" the work momentarily and reversing, and there are heavy-duty machines designed for general purpose metalworking applications.

A few construction points can be used to compare one machine with another:

Frame: Look at frame construction-rigidity, bolster thickness, dimensional capacity, and other factors.

Cylinder: What diameter is it? How is it constructed? Who makes it? How serviceable is it?

Maximum system pressure: At what psi does the press develop full tonnage? The most common range for industrial presses is to psi.

Horsepower: The duration, length, and speed of the pressing stroke determines the horsepower required. Compare horsepower ratings.

Speed: Determine the speed each hydraulic press offers.

Buyer Beware
There are many potential pitfalls to take into account when selecting your hydraulic press.  Things to watch out for include:

Speed. There are no hydraulic presses today that are as fast as the fastest mechanical presses. If speed is the sole requirement, the application is fixed and the material feed stroke is relatively short, the mechanical press remains the best selection.

Stroke depth. If a limit switch is used to determine the bottom, the stroke depth is not likely to be controlled much closer than .020". Many hydraulic presses can be set to reverse at a preselected pressure, which usually results in uniform parts. Generally, if absolute stroke depth accuracy is required, "kiss" blocks must be provided in the tooling.

Automatic feeding equipment. Hydraulic presses require some external or auxiliary power to feed stock. The feeder must have its own power, and must be integrated with the press control system.

There is, however, an increasing selection of self-powered feeding systems available such as roll feeds, hitch feeds, and air feeds.

Shock after breakthrough in blanking. Both mechanical and hydraulic presses experience this problem. But the hydraulic system of a hydraulic press must also be isolated from the shock associated with decompression. If the hydraulic system does not contain an anti-shock feature, this shock can affect the lines and fittings.

Do your Homework
As with any major purchase, it&#;s important to do your homework. Once you determine you want to go hydraulic, take the time to consider the issues reviewed above to make sure you get the best solution for your specific application.  And strongly consider selecting a vendor you can easily partner with.  Key things to look for include excellent communication and support, engineering expertise and custom-build capability, all of which inevitably provide press success.


Source:
Greenerd Press & Machine Company, Inc.
www.greenerd.com






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Perhaps you&#;re familiar with the story of Goldilocks and the Three Bears? In her quest for the perfect bowl of porridge, the perfect bed and the perfect chair, she tried out some bad ones along the way. With a hydraulic press, you can&#;t afford to make a mistake. The stakes are a little higher than just some lumpy oatmeal. This guide will give you an idea of what to ask, what to look for and what to consider when it comes to sourcing a hydraulic press that&#;s right for you and your business.

 

You already know the advantages of a hydraulic press. You know it can perform at a demanding pace, within exacting tolerances and at an output that can&#;t be matched by hands-on, human labour. While these are important features, you should also be asking these questions:

The company is the world’s best automated hydraulic press supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.

 

What is the tonnage required to get the job done?

The beauty of a hydraulic press is that it&#;s fast and simple to adjust tonnage meaning that you can tune the press to exactly the right tonnage you need for the right job.

 

What kind of Press do I need 4-Post, Straight side, Gib guided or other alternatives?

Like the best of us, a hydraulic press can multi-task! A hydraulic press can be used on multiple jobs, different sizes and shapes of metal and offers a high degree of customizable options suitable to a wide variety of industries. While indeed a 4-Post or Gib guided hydraulic press might best suit a particular function &#; hydraulic presses in general still offer a flexibility not found in other machines. Just one hydraulic press can sometimes do EVERYTHING you need with their ability to perform a variety of tasks like: stamping, crushing, bending, molding, forming and drawing.

• An Open-gap press will give you, as the name implies, easy access from three sides giving you flexibility in where and how the machine is positioned in your facility. Sometimes also called C-Gap presses they are ideal for smaller shops.
• 4-Post or 4-Column presses are considered a good idea for applications where larger dies are required. A 4-Post also offers flow through capability with work entering at the front and exiting from the rear. This press offers good accuracy.
• Gib-guided presses offer superiority when it comes to off centre loading, are adjustable and ensure precise ram guidance. Also known as Straight-sided presses, they also offer rigidity when using progressive die applications. Tight clearance and fully adjustable left to right as well as back to front they provide great resistance to any lateral slide motion.

 

What accessories will I need?

Whatever you need, a hydraulic press will have it. From dwell timers to ejection cylinders, touch screen controls to servo-system adaptability, a hydraulic press can be customized to meet your exacting specifications. Die cushions, automatic cycling and sliding bolsters are still more options. Varying ram speeds and computerized dashboards mean you can maximize efficiency and precision on almost any type of job.

 

What is the cost of my investment?

Comparatively speaking, the cost of a hydraulic press is lower in terms of up front costs and your return on investment is excellent with efficiencies gained including faster production times, improved safety and lower labour costs. You&#;ll even be doing something good for the environment. With fewer moving parts, more energy efficiency and less fuel required to operate, they&#;re environmentally friendly too!

If you are looking for more details, kindly visit Hydraulic press industry uses.