Use of an electric hammer for splitting oversize magnesite blocks

Refractories ◽  
1982 ◽  
Vol 23 (9-10) ◽  
pp. 468-469
Author(s):  
Yu. F. Kabachkov ◽  
B. M. Vainer ◽  
V. V. Lesnikov
Keyword(s):  
Electric Hammer

The molecular mobility of the epoxy binder in a modified composites by electric-hammer

2021 ◽  
Vol 103 (3) ◽  
pp. 70-78
Author(s):  
Petro Stukhlyak ◽  
Oleg Totosko
Keyword(s):  
Composite Materials ◽  
Dielectric Loss ◽  
Molecular Mobility ◽  
Loss Angle ◽  
Hydraulic Shock ◽  
Surface Layers ◽  
Dielectric Characteristics ◽  
Dielectric Loss Angle ◽  
Dispersed Filler ◽  
Electric Hammer

In this work, the study of molecular mobility in the surface layers by the method of determining the dielectric characteristics of materials modified by electrospark hydraulic shock, determined the optimal content of the dispersed filler. Comparative data of the tangent of the dielectric loss angle of treated and untreated composite materials are presented.

Construction Ergonomics: Concrete Bit Wear Increases Handle Vibration and Drilling Time

2017 ◽  
Vol 61 (1) ◽  
pp. 969-972
Author(s):  
David Rempel ◽  
Andrea Antonucci ◽  
Alan Barr ◽  
Bernard Martin
Keyword(s):  
Musculoskeletal Disorders ◽  
Test Bench ◽  
Construction Workers ◽  
Exposure Level ◽  
Drill Bit ◽  
Worker Productivity ◽  
Vibration Syndrome ◽  
Bit Wear ◽  
Electric Hammer ◽  
Drilling Time

The use of large electric hammer and pneumatic drills exposes construction workers to high levels of hand vibration that may lead to hand arm vibration syndrome and other musculoskeletal disorders. This hammer drill test bench study demonstrated a small but significant increase in z-axis handle vibration (4.8 to 5.1 m/s2; ISO weighted) and drilling time per hole (7.8 to 12.3 s) with worn concrete bits when compared to a new bit. Drill bit manufactures may consider advising contractors that worn bits will increase the exposure of workers to hand vibration and will reduce worker productivity. Construction contractors should adopt a bit replacement program based on bit wear patterns in order to reduce exposure level and drilling time to hazardous hand vibration.

The electric hammer

1922 ◽  
Vol 41 (4) ◽  
pp. 297-305 ◽  
Author(s):  
P. Trombetta
Keyword(s):  
Electric Hammer

Development of an Electric Hammer Using Self-Synchronization Phenomena

2016 ◽  
Vol 2016 (0) ◽  
pp. G1000204
Author(s):  
Yasuhiro BONKOBARA ◽  
Hyuga UMEMURA ◽  
Yoshihiro KAWANO ◽  
Akito KOYANAGI ◽  
Takayuki HAMAHATA ◽  
...  
Keyword(s):  
Electric Hammer

The electric hammer

1922 ◽  
Vol 41 (10) ◽  
pp. 749-755
Keyword(s):  
Electric Hammer

A thin walled tube for core sampling of soils

1962 ◽  
Vol 2 (7) ◽  
pp. 238 ◽  
Author(s):  
HCT Stace ◽  
AW Palm
Keyword(s):  
Steel Tube ◽  
Hydraulic Jack ◽  
Core Sampling ◽  
Core Sampler ◽  
Saturated Sands ◽  
Thin Walled Tube ◽  
Sampling Programme ◽  
Thin Walled ◽  
Electric Hammer

A new core-sampler for sails is described-A thin-walled steel tube is driven into the soil by a sliding weight arrangement. The tube with its enclosed core is extracted with a hydraulic jack. For a sampling programme of either a large number of holes or very deep ones an electric hammer is very suitable for driving the tubes. Modifications enable the tubes to be used in saturated sands and wet sticky clays.

554 Development of an Electric Hammer Using Self-Synchronization Phenomena : A Fundamental Model

2012 ◽  
Vol 2012 (0) ◽  
pp. _554-1_-_554-9_
Author(s):  
Kyohei TOMINAGA ◽  
Yasuhiro BONKOBARA ◽  
Takahiro KONDOU ◽  
Tomoki ONO
Keyword(s):  
Fundamental Model ◽  
Electric Hammer

Development and performance evaluation of an electric hammer using self-synchronization phenomena

2019 ◽  
Vol 2019 (0) ◽  
pp. 138
Author(s):  
Kaito IWAKIRI ◽  
Yasuhiro BONKOBARA ◽  
Takayuki HAMAHATA ◽  
Takahiro KONDOU
Keyword(s):  
Performance Evaluation ◽  
And Performance ◽  
Electric Hammer

Development of an Electric Hammer Using Self-Synchronization Phenomena

2017 ◽  
Vol 2017 (0) ◽  
pp. G1000303
Author(s):  
Hyuga UMEMURA ◽  
Yasuhiro BONKOBARA ◽  
Misaki IRIE ◽  
Takayuki HAMAHATA ◽  
Takahiro KONDOU
Keyword(s):  
Electric Hammer

The Electric Hammer

1922 ◽  
Vol XLI ◽  
pp. 233-241 ◽  
Author(s):  
P. Trombetta
Keyword(s):  
Electric Hammer
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