Introduction:
Screwdrivers are very popular among the hand tools which we use in our daily use. But now a days the screwdriver demands hardness and higher torque values for the meeting the requirements and to compete between the manufacturers. For maintaining both torque and hardness in higher level. there are mainly three key factors for the producing the required type of screwdriver : heat treatment, material and machining processing. On the other hand the most famous type of steel used in the manufacturing of the screwdriver bit are Cr-V type of steel, material wise known as SAE6150 steel. The hardness of this material is known to be HRC52 (+ 0r - ,2) and the value of torque is about 180 - 190 kgf.cm. There are different varieties of tips for a screwdriver which include Robertson ,clutch, .Allen and Torx but very standard types of tips are flat, slotted, straight or flared.
Design Aspects of screwdriver:
The designing aspects of a screwdriver consist of a handle and a shaft. The shaft will be made of tough steel in order to prevent twisting or bending while usage. The handle can either be made with wood or rubber also with plastic. Mostly plastic material will be used for making the handle in order for better handling and for safety purpose.
Materials for manufacturing Screwdriver Tip :
Later a new variety of steel material is been used in the industry by the composition of different kinds of steel. The development of this material were used latterly in common for producing hard and high torque screwdriver, most importantly fractures cannot happened in this kind of material. The steel which we were talking about in the beginning was smelted in a high vacuum and forged to the required shape and they are welded in furth...
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... screwdriver which will result in deduction of discrete particles gradually from the material from the contacting surface of the screwdriver.
Improvements that can be made:
In manufacturing the handle we can use injection molding instead of extrusion method. Because extrusion molding method has a limitation in the types of handle it can make. Though extrusion method also can make a selective variety of handles but it will be more cost effective and time affective when compared to injection molding.
Conclusion:
A Screwdriver is a very common tool that is used to loosen or tighten a screw. Manufacturing wise this module (Material Engineering Design) gave us a different view over the materials and the tools which are made out of it. We now understand the manufacturing of things by the prospective of the design, process, assembling and failures that can occur.
We use metals to construct all kinds of structures, from bridges to skyscrapers to elevators. The strength as well as durability of materials that are crafted out of metal make the materials ideal not only for construction but also for many other applications.
The micro hardness of the prepared samples were obtained by using a Vickers Micro hardness Tester (Model : Leco LV 700, USA). 5 readings were taken for each sample to calculate the average hardness. An indentation load of 5gf was used. After calculating the average hardness for each sample, mean variance and standard deviation (S.D.) was calculated to check the consistency of the data.
A roller screw includes three basic elements: a threaded screw shaft, a rib or grooved nut, and a group of rib or grooved rollers that have interaction with each the shaft and nut. Rotating nut causes the axial shaft movement. Three completely different styles of roller screws are ordinarily out there. They are
US Army Correspondence. (2000). METAL PROPERTIES, CHARACTERISTICS,. US ARMY REPAIR SHOP TECHNICIAN WARRANT. Retrieved from www.hnsa.org/doc/pdf/metal-properties
This tool has a thin metal sheet or ribbon attached to the handle. The ribbon carves into the material.
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Four brass wedges were tested. Two were cold rolled to a thickness of 5.0 mm and two were cold rolled to a thickness of 2.5 mm. One wedge of each thickness was then annealed for 1 hour at 350 °C. Because the wedges varied in thickness across the length, multiple cold work values were able to be recorded. Hardness and thickness measurements were taken before and after the cold rolling and after the annealing as shown in Figure 1. Generally, as cold work increased, hardness increased.
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For several tasks, it is available with drill bits which are quite helpful in screw driving and space mission applications. It is fitted with electrical motor that can drill a hole in the object by moving the bit in a rotating mode. It can work in a variable speed and easy to adjust in accordance to the requirements of the task and comfort of the skill worker. These days cordless drill accessories are used frequently than common drill accessories. The reason of using cordless drill accessories is that they contain battery fitted in the hand...
The inefficiencies and the problems involved in making steels in the traditional form of ingots are alleviated by the continuous-casting process, which produces higher quality steels at reduced costs. Conceived in the 1860s, continuous or strand casting was first developed for casting nonferrous metal strips. The process now is used widely for steel production, with major productivity improvements and cost reductions.
Friction Stir Welding (FSW) is a solid-state joining process that involves joining of metals without fusion or filler materials. The frictional heat is produced by a rapid rotating non-consumable high strength tool pin that extends from a cylindrical shoulder. In this paper 6mm, thick copper and bronze plates are friction stir welded at different tool rotational speeds of 800, 1000 and 1200 RPM, with a constant travel speed of 40 mm/min and an axial force of 10 kN. Tests like Optical Microscopy (OM), Scanning Electron Microscopy (SEM) and Microhardness is done to identify the metallographies studies. The friction stir welding experiments are carried out with the transverse speed of 40 mm/min of the tool. Vickers hardness test, microstructure
We started our exploration by leading a general scan for screwdriver sets. There are several brands and set blends making it basic to limit the rundown in view of nature of the item, unwavering quality of the brand, solidness, accessible screwdriver sizes, conveying limit, nature of the hold, and consumer loyalty. This empowered us to limit the rundown to a littler gathering to be tried.
Some steel containers are made through deforming the steel by means of extruding, forging, spin forming, ...
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