Archive for the ‘ASTM D638 Type I’ Category

Demonstration of the Tensilkut II

June 23, 2015

The Tensilkut II is used to easily prepare flat tensile, compression, flexural and other specimens from metals and non-metallics.  This machine is designed for operation in the testing lab by technicians without previous machining experience.

The starting blank is inserted into the Tensilkut Master Template, and the clamping screws are tightened as shown in this video.  The micrometer dial on the Tensilkut control head is set to its starting position, and a series of light passes are taken to cut the material from each side of the specimen.  When the correct tensile specimen dimensions are achieved, the micrometer dial will stop turning, thus preventing cutting an undersized test specimen.  After removing the completed ASTM E8 or other specimen from the master template, the tensile bar is ready for immediate testing.

ASTM D638 Type I Tensile Specimens

May 7, 2015

ASTM D638 Type I is likely the most commonly used tensile specification for the testing of plastics.  Tensilkut Engineering manufactures templates for use with each model Tensilkut I and Tensilkut II for preparing these test coupons.

Tensilkut Master Templates for ASTM D638 Type I: 50-44, 50-46, 50-48

Tensilkut Master Templates for ASTM D638 Type I: 50-44, 50-46, 50-48

50-48

50-46 Tensilkut Master Template

50-46 Tensilkut Master Template

50-44 Tensilkut Master Template

50-44 Tensilkut Master Template

Cutting Specimens from Plaques

March 31, 2015

Some customers wish to cut specimens from plaques, using the CNC Tensilkut III, without first cutting the pieces into strips. This unit can be designed to do just that.

The machine is programmed to cut the specimens you need in the layout you desire. All clamps are custom made, and, as shown in this photograph, this plaque will be cut into ASTM D638 Type I specimens, cutting the entire length of each bar.

Plaque to be cut with CNC Tensilkut III

Plaque to be cut with CNC Tensilkut III

Often, a plaque which is to be cut into all tensile bars is sawn into strips using the Tensilsaw before the pieces are clamped into the machine. More commonly, when a customer wishes to cut specimens from a plaque, he wants several types of specimens, including tensile, flexural and impact blanks.

Although this can be done for thin plaques of metal, it is not recommended, as the cutting time is significantly longer, and the cutter wear will be much greater. Using the Tensilshear to cut metal strips to be clamped in the CNC Tensilkut III is much more efficient.