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Content tagged with "ram"

Results: 23

Article

January 13, 2004
Troubleshooting compression bending Most compression bending problems are one of three types: Flattening or collapsing on the outside of the bend. Crimping or wrinkling on the inside of the bend. Dimpling on the inside of bend. Generally you can prevent these problems by implementing these standard solutions:... Read more...

Article

January 13, 2004
Rolling bolsters bolster productivity Shown out of the press, the guided wheels on this 120,000-pound rigid chain rolling bolster are evident on the front face of the bolster. One element of changing dies in stamping presses quickly and efficiently is the use of a rolling bolster. With this equipment, the operator rolls... Read more...

Article

December 11, 2003
Selecting a stamping die pressure system, Part I Selecting the stamping die's pressure system can be a critical decision. Many questions must be answered to determine what type of pressure system best suits your application. Controlling Factors 1. Pressure requirements Simple conventional metal cutting dies, such as those used in blanking... Read more...

Article

November 6, 2003
New PC-based controls open path to better press brake utilization A critical benefit of offline programming and bend simulation is that fabricators can determine upfront whether the part can be bent, avoiding shop floor trial-and-error. Traditionally, press brake operation has required skills that could be acquired only through years of on-the-job... Read more...

Article

July 24, 2003
Die width selection Most designers and engineers usually place very little importance on achieving the correct inside radius of a formed part. Why? Because the functionality of the part is unaffected if the specified inside radius is 0.062 in. and actual measured inside radius is 0.078 in. So why do we care about... Read more...

Article

May 29, 2003
Making your own punch and dies Speaking from 30 years of experience, I'd say this situation probably is a fact of life for 99 percent of us. Whether we are doing some in-house engineering and design or working at the press brake, the thought is the same. An End to the Dilemma Sure enough, there is a reasonable solution... Read more...

Article

November 15, 2002
Equipping Your Press With the Right Tonnage Monitor Tonnage monitoring equipment has been around for several decades. The early models were sometimes finicky, hard to use, and susceptible to outside electrical interference. Today's tonnage monitors are easier to install, simpler to use, and more reliable. Many types are available to meet the... Read more...

Article

July 11, 2002
Can I form a box that deep? Figure 1 One of the more common questions asked in day-to-day press brake operations is "Can I form a box that deep?" If you select the wrong tool, the side of the box will crash into the ram. This can produce the wrong bend angle or prevent the forming of tight corners. In most... Read more...

Article

November 29, 2001
Gettin' down with downtime The pressures of increased competition and the need for stampers to stay competitive affect every aspect of their operations. One of the key ways stampers can create an efficient and cost-effective operation is to reduce downtime on the shop floor. One of the principal causes of downtime... Read more...

Article

November 15, 2001
Adaptive bending In conventional press brake bending, the bend angle obtained often differs from the programmed angle even though it is produced on a CNC machine. To overcome this problem, the bend angle can be measured during the forming process and this information fed to the numerical control. This process... Read more...

Article

November 15, 2001
Contract stamper increases die life and draw die productivity Object Jancox Stampings has remained competitive by investing in link drive mechanical presses from PTC, offering value-added assembly services, and encouraging employee initiatives. The article discusses how the presses work and how reduced speed reduces springback (which allows the company... Read more...

Article

October 25, 2001
Comparing single-cut and dimple-free tube mill cutoffs This article covers the application of single-cut and dimple-free cutoff shear technologies as they are applied to contemporary high-speed tube mills. A single-cut die set is a unit composed of an upper shoe and a lower shoe in which a single severing blade and tube supporting jaws are... Read more...

Article

October 11, 2001
The Brakes: Press Brakes and You -- Whose business is safety? Everybody's Whether you are an owner, employer, operator, tool setter, or maintenance person, press brake safety is your business. You are responsible for operating and maintaining your equipment in compliance with recognized safety standards and plain common sense. Foremost, an organized safety committee... Read more...

Article

September 4, 2001
Standardizing finger tooling Figure 1: Tooling is mounted to transfer rails by receivers, which provide mechanical, electrical, and pneumatic connections. Improvements in transfer press automation and the availability of used large-bed presses for retrofitting have accelerated the use of transfer presses with... Read more...

Article

August 16, 2001
In search of the perfect bend Press brake manufacturers have made tremendous advances in the art of machine design and manufacturing. Machine frame components are designed to use proven mechanical engineering principles combined with CAD technology to identify the areas most susceptible to stresses consistent with the metal... Read more...

Article

August 16, 2001
The Brakes: Press Brakes and You -- Preventing common mistakes on press brakes Press brakes—they're wonderful machines that, unfortunately, present many opportunities to make mistakes. The good news is that many mistakes are so common that a nice file of prevention tactics has stacked up against them. The following miscues and mishaps are commonplace—and... Read more...

Article

July 12, 2001
Experimenting with flexible blank holder force control: Prototype shows promise for difficult-to-form materials The quality of deep drawn sheet metal products is determined largely by the rate at which a sheet is drawn into a die. Varying blank holder force (BHF) as a function of time or the press stroke is of great importance. In the beginning of a deep drawing stroke, wrinkling of the sheet can become... Read more...

Article

June 18, 2001
The Brakes- Press Brakes and You -- How to get the most out of your press brake The press brake is perhaps the most valuable machine in the average fabricating shop. If the press brake is hard to set up and/or produces inaccurate parts, you are losing money every time you use the machine--excessive setup time, time wasted making bad parts, and scrap parts all cost you a lot... Read more...

Article

June 15, 2001
Successful tube hydroforming: Watching parameters, accurately simulating the process yield good results A typical tube hydroforming system is shown in Figure 1 . Within this system, a host of factors must be taken into account, from starting tube geometry and material properties to the quality of the final part (such as thickness distribution and dimensional accuracy). Each of these... Read more...

Article

May 15, 2001
Hydroforming of tubes, extrusions, and sheet Hydroforming tubes, extrusions, and sheet metal is a state-of-the-art enterprise and is just now becoming more popular in the industrial production of frames for light trucks and vans. Figure 1: Hydroforming tubes with outer pressure, though not the norm in the industry, has several... Read more...

Article

April 10, 2001
8 ways to keep your shear in top shape Shears are common pieces of fabricating equipment that can be found in many metal forming plants. From tube mills to small fabricators, the shear is one of the most critical and diverse tools used in metal fabricating. Varying in size from small hand-held metal shears and foot-operated trim... Read more...

Article

February 19, 2001
Brake Line: Press Brakes and More: Planning to cut corners on safety? Plainly put, press brake safety is a common sense issue. Most accidents are caused by operator inattentiveness or lack of training. Two major categories of press brake safety are machine setup and operational safety. Along with proper tooling selection, applied tonnages, and installation,... Read more...

Article

February 19, 2001
Die design for flat parts: Achieving perfection in a difficult task Flatness is one of the most difficult part characteristics to achieve in a conventional stamping die. Some of the factors controlling part flatness are: 1. The severity of the steel cutting deformation. 2. The mechanical properties of the sheet material. 3. The incoming flatness of the... Read more...

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