The Greek mathematician Arkutas once described the principle of screw, screw, screw. In the first century AD, the Mediterranean world had begun to use wood screws, screws, screws in screw presses, which could press olive oil from olives, or make wine from grapes. Before the fifteenth century, metal screws, screws, screws were rarely used as fasteners in Europe.
Rybczynski (Rybczynski) proves that hand-held screwdrivers, screwdrivers already existed in the Middle Ages (at the latest AD 1580), but it was not until the eighteenth century that threaded fasteners were commercialized and began to be widely used. .
Before threaded fasteners were widely used, there were many different ways of tightening. Mostly related to woodworking and forging, and less to machining, concepts such as dowels and pins, wedges, tenon and tenon, dovetails, nails, forge welding, and others are tied with leather or fibers and tied together. Before the mid-nineteenth century, ships were built with cotter pins, pin bolts, or rivets. Adhesives were also available at that time, but not as many as they are today.
Metal screws, screws, and screws have been used in the eighteenth century to mass-produce screws, screws, and screws, and metal screws, screws, and screws have become commonly used fasteners. This technology developed in the 1760s and 1770s, along two separate processes. Approaches, but quickly converged: wood screws, screws, screws (metallic screws for wood fixing, screws, screws) are machined with single-purpose, high-yield machines, and low-volume, mold-shop style production V-Thread Machine Screws, Screws, Screws, can choose from a variety of different pitches.
The first process mentioned above was first proposed by brothers Job and William Wyatt of Staffordshire, England, who applied for a patent in 1760, which can be called a screw at most, The screw, an early version of the screw machine, used a lead screw to guide the cutting edge to produce the desired pitch, the screw groove was created by a rotary file, and the spindle was stationary at the time. It wasn't until 1776 that they built their first carpentry screw, screw, screw factory and started operations. Their business failed, but the new owners turned around and in the 1780s produced 16,000 screws, screws, screws a day, requiring only 30 workers, the productivity and capacity of this industrial production is the current industry standard, but in the 1780s It was a revolutionary breakthrough at the time.
Meanwhile, British tool maker Jesse Ramsden (1735–1800), also working as a cutter and die maker, encountered problems with cutting screws, screws, screws, and in 1777 he invented the first satisfactory screw lathe. English engineer Henry Maudsley (1771–1831) is famous for popularizing the technique with his screw lathes, which were lathes of 1797 and 1800, including lead screws, slides, variable gears The gear sets are all standard proportions of industrial production. He unifies the way the Wyatt Brothers and Ramsden produce screws, screws, screws, and uses the methods already in the production of woodworking screws, screws, screws to produce machine screws, screws, screws, and stimulates the commercialization of production. Ten years later his company is still the leading brand in machine tools. The Scottish engineer at the time, James Nesmith, was incorrect in his misrepresentation that Maudsley "invented" the slide and Maudsley popularized the lathe.
