Steel anvils

Tough, hard steel anvils, hammers, cable wire, wrenches... 

ONRSympDeton(1965), 473-76. A sensitivity test illustrated in Fig 20 deals with cylindrical, unconfined HE samples of the order of several pounds in weight, squeezed between an explosively propelled steel plate (6 inches in diameter) and a steel anvil. 

Impact Machines and Impact Tests. One frequently hears the remark that there are as many types of impact machines as there are explosives test laboratories. This is somewhat misleading. In reality, all laboratories use essentially similar equipment but test procedures, and test data analyses differ. Basically an impact machine is an apparatus that drops a steel weight from a pre-determined height onto a plunger or striker resting on top of the test sample which is placed on a steel anvil... 

The weight is dropped from heights up to 320 cm and is usually 2.5 kg although 2- and 5-kg weights are alternatives. The 35-mg sample rests as a loose pile in the center of a 1-in.-square piece of sandpaper, placed on a hardened steel anvil, 1.250 in. diam. The 1.25-in.-diam striker rests on the explosive and slides freely within a guide. A "noisemeter," an audiovisual instrument, is used to assist the operator in his judgment [4]. 

A sample is placed between two steel anvils. A drop-hammer is allowed to fall on the upper anvil, which transfers the impact to the sample. 

Rorvik (Ref 31) demonstrated that a zirconia-coated steel anvil retained more heat, with the workpiece allowing the tool to travel three times faster to obtain the same heat-affected zone width produced with a steel anvil. A statistical analysis of nine input parameters determined that cooling the anvil had a minimal impact on the friction stir weld in fact, tool rotation rate, travel speed, and tool depth were more important (Ref 24). Weld quality and performance is affected by differences in heat transfers observed when comparing the friction stir welding of flat plate versus extrusions (Ref 97). Extrusions typically have complicated cross sections, with features that quickly draw heat away from the friction stir weld. This dissipation of heat through the extrusion increases the tool heat input necessary to create a quality friction stir weld. 

Steel-on-steel anvil on either steel or concrete pile 0.50 Cast-iron hammer on concrete pile without cap 0.40... 

The pipe size and material of which it is made may differ. The top pipe with the inserted charge is put on the witness pipe, and the two pipes are then fixed together by adhesive tape. Both pipes are then fixed to a mild steel anvil. Afterwards, the explosive charge may be initiated. 

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