Archive for the ‘CNC Tensilathe’ Category

Turning Round Tensile Bars

November 16, 2017

Tensilathe in operation, turning a stainless steel bar in accordance with ASTM E8.

Turning a Round Tensile Bar

Turning a Round Tensile Bar

The machine is simplified in operation, and completes round tensile bars quickly.

Contact us for more information on making your lab more efficient with the Tensilathe from Tensilkut Engineering.

 

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Cutting Round Monel Tensile Bars

November 6, 2017

Recently, we shipped a CNC Tensilathe to a customer who was cutting, amongst other materials, Monel.  This is a very hard material to cut, but the CNC Tensilathe handled it well.  These are pictures of a shaving from the monel bar, as it was being cut; we cut it in .012″ deep passes, which would equate to approximately 10 passes for an ASTM E8 bar cut from a .750″ diameter starting piece.

The starting end of a shaving from a Monel bar, cut in accordance with ASTM E8 on the CNC Tensilathe

The starting end of a shaving from a Monel bar, cut in accordance with ASTM E8 on the CNC Tensilathe

A shaving from the cutting of a Monel Tensile Bar using the CNC Tensilathe.

A shaving from the cutting of a Monel Tensile Bar using the CNC Tensilathe.

Starting with an irregular bar would require more and shallower cuts, but with Tensilkut’s CNC machines, we program the specimens for your starting size and shape, and you insert the blank into the machine, select the specimen from the drop down menu on the integral computer, and walk away until the cycle is finished, and your specimen is complete.

Contact us for more information on how the CNC Tensilathe can help your testing lab become more efficient.

Complex Round Test Bars

November 1, 2017

In addition to being able to turn perfect shouldered, button head and threaded tensile bars, Tensilkut’s CNC Tensilathe has been used for preparing more complicated, proprietary test specimens.  This one is a fine example:

Tapered stress test bar

Tapered stress test bar

This is a bar designed by a customer for a specific test of longevity of Hastelloy.  Each of the end sections on both ends is tapered, as is the gauge section.  This test specimen is beautiful in its complexity.

Ends of tapered stress test bar

Ends of tapered stress test bar

Of course, because it was turned from Hastelloy, accommodations had to be made in the program; when the program would turn steel or stainless specimens perfectly, the deflection from the Hastelloy caused it to be oversized.  When we program your specimens for the CNC Tensilathe or the CNC Tensilkut III, we want to receive several samples of your actual material, so our programs will accurately prepare your test bars, regardless of its properties.  Machines which accurately prepare physical test specimens are the only things we’ve ever built, and we pride ourselves on offering the best sample preparation equipment available.

Turning Round Tensile Bars

September 29, 2017

Turning round tensile test bars has always been a difficult and tedious process.  A full charge machinist can turn a test specimen using a lathe, but it will take some time, and, unless the machinist is fastidious, it may not be within the tolerances required by the specification.  Additionally, since machinists will often turn bars using only the largest possible passes, the bar will likely need hand finishing to remove distortion caused by the turning process.

Tensilkut has two machines designed to allow you to turn round tensile bars in accordance with ASTM E8, ASTM A370, JIS, DIN and ISO specifications in the lab.  Technicians without previous machining experience can learn to run these machines in short order; as with our other machines, these machines are supplied with a self-instruction manual, so it can be used by different operators as time goes on.

The Tensilathe/505 is our semi-automatic tracing lathe.  It operates from a Master Template, which controls the shape and dimensions of the specimen.  The operator needs only to dial in each cut to prepare a perfect tensile bar.

Tensilathe/505 semi-automatic tensile sample turning machine

Tensilathe/505 semi-automatic tensile sample turning machine

The CNC Tensilathe is the automated round test specimen preparation system.  This machine runs on a Windows-based microcomputer; specimen preparation is accomplished with a point and click software system.  After setting up the specimen, the operator is free to complete other tasks while the sample is turned automatically.

CNC Tensilathe for the automatic turning of round tensile specimens from most metals

CNC Tensilathe for the automatic turning of round tensile specimens from most metals

Please call 865-982-6300 for further information, or fill in the contact form below for a speedy response.

ASTM E8 Threaded Tensile Bars

October 16, 2013

ASTM E8 threaded tensilesThese round tensile bars to ASTM E8 were turned with the CNC Tensilathe, using the optional threading package.  The larger bar is the standard .505″ x 2″ gauge section; the smaller is the .250″ x 1″ subsized ASTM E8 specimen.

CNC Tensilathe

April 16, 2009

Bill Gates has done many wonderful things for the world.  Obviously, he brought the ability to use computers to the masses, which has expanded employment throughout the world in related fields.  Without Bill’s contribution to the computer world, it’s likely that the Internet as we know it wouldn’t exist, because consumers wouldn’t be able to use it.

From the personal perspective of anyone reading this entry, however, one of the great things Bill Gates has indirectly influenced is the ability of laboratory personnel to automatically turn round test bars.  Without Bill, we’d still be back in the days when CNC machine operators had to attend special “CNC School” for months, and each machine cost around $100,000.

The CNC Tensilathe is the only laboratory-sized, automatic lathe designed specifically for turning round tensile bars from most machinable materials.

CNC Tensilathe

CNC Tensilathe

With its dependable, 1-1/2HP, 180VDC motor, the CNC Tensilathe will prepare specimens from round or irregular stock; full sized or subsized tensile, fatigue and similar round test samples can be accomplished. It was developed for operation by lab personnel with no previous machining experience, and operates on a Windows based microcomputer. The CNC Tensilathe uses a standard 3-jaw chuck to hold the specimen; the opposite end is center drilled to accommodate a live center. Samples from approximately 1/4” to 2” diameter can be completed, using round or irregular starting blanks; the finished specimens are accurate to within +.0005”, and will have a 32 or better surface finish, depending upon the material. A built-in micro-drop coolant system increases cutter life and improves surface finish, while the moveable chip shield over the working area reduces flying chips. An emergency stop switch is mounted on the front of the lathe, as are all power switches. The CNC Tensilathe is shipped fully set up; the computer must be hooked up, and the machine is ready to operate.

Turning a sample with the CNC Tensilathe

Turning a sample with the CNC Tensilathe

As with all Tensilkut machines, the CNC Tensilathe comes with a self instruction manual; training is available in our facility at no extra cost.  The machine is programmed for the user, and shipped with all sample contours ordered pre-installed into the computer.  Additional specimen programs can be added later.