【正文】 有一類氣動(dòng)裝置有時(shí)北設(shè)計(jì)為專用的氣動(dòng)工具。鉆桿的一端是柄，另一端是鉆頭。氣動(dòng)馬達(dá)的速度可以調(diào)整，轉(zhuǎn)向是可以變化，且在過(guò)載時(shí)能停止工作而不受損壞。在有閥型中，閥用來(lái)控制進(jìn)出活塞兩 端的空氣；在無(wú)閥型中，閥的作用由活塞來(lái)完成。每天在大量的制造產(chǎn)品諸如汽車、冰箱、收音機(jī)和各種各樣器具上，成百萬(wàn)的螺母、螺栓和螺釘?shù)扔脷鈩?dòng)工具來(lái)安裝。某些工具式可雙向的，轉(zhuǎn)子的旋轉(zhuǎn)方向式任意的，而這些工具式不可逆雙相旋轉(zhuǎn)的。 磨削工具：磨削工具包括研磨器、打磨器和沙光機(jī)。因?yàn)闅鈩?dòng)馬達(dá)沒(méi)有電擊的危險(xiǎn)，它還能在潮濕的環(huán)境中工作。 壓縮空氣可以保證使用工具相對(duì)緊湊，總量輕，靈活，易于攜帶，易操作。 沖擊式或氣錘式氣動(dòng)馬達(dá)主要應(yīng)用于切削、打鉚機(jī)、路面破碎機(jī)。典型的旋轉(zhuǎn)式氣動(dòng)馬達(dá)有 3－ 5 個(gè)葉片，轉(zhuǎn)子速度在 4000 到25000rpm 之間，功率可達(dá)到 3馬力。供給啟動(dòng)工具的壓縮空氣的表壓力通常是每英寸 90 磅。在戶外建筑施工時(shí)，空氣壓縮機(jī)是便攜的。 商用馬達(dá)的型號(hào)功率范圍從 1/10 馬力（ 1 馬力 =）至 50 馬力，速度范圍從 20rpm 到 75000rpm。輸入氣動(dòng)馬達(dá)的氣壓是可調(diào)節(jié)的，所以當(dāng)螺釘?shù)臄Q緊力達(dá)到一個(gè)恰當(dāng)值時(shí)，氣動(dòng)馬達(dá)就停止。 研究旋轉(zhuǎn)式氣動(dòng)馬達(dá)功率 速度曲線：輸出功率在速度為零到最大之間取得最大值。馬達(dá)內(nèi)的壓力有入口處的壓力調(diào)節(jié)閥調(diào)節(jié)。 氣動(dòng)馬達(dá)的特點(diǎn) 氣動(dòng)馬達(dá)可以在易爆的空氣中安全工作，并且具有安裝成本低，加速快速，啟動(dòng)轉(zhuǎn)矩大的特點(diǎn)。于是壓縮空氣帶動(dòng)轉(zhuǎn)子旋轉(zhuǎn)。 氣動(dòng)馬達(dá)的類型 氣動(dòng)馬達(dá)分為兩種類型：（ 1）旋轉(zhuǎn)式；（ 2）往復(fù)式。another type is valve operated. One class of pneumatic tools is sometimes designated as pneumatic specialty tools. They include:staybolt riveters, paint mixers, screw spike drives,wirewrapping decices, spinner riveters, shank grinders, reciprocating filing machines, valve grinders, staybolt tappers, air cranking motors,cutoff machines, concrete vibrators,countersinking tools, clip squeezers, tirevalve inserters, multiple screwdrivers and coreknockout machines. 氣動(dòng)馬達(dá)及工具 壓縮空氣可實(shí)現(xiàn)多種多樣的操作，例如：驅(qū)動(dòng)氣動(dòng)馬達(dá)和氣錘，驅(qū)動(dòng)氣缸，使液體霧化，傳送物體，移動(dòng)和攪拌液體，當(dāng)作氣彈簧，產(chǎn)生真空，加速燃燒，還可以用做冷卻劑，和潤(rùn)滑劑。the motor can withstand repeated stalling and reversing without damage or air motor can accelerate(or speed up)rapidly,because the pressed air energy can be released at a high rate. Air motors are available mercially in sizes ranging from 1/10 7 horsepower to 50 horsepower,and in speed ranging from 20 rmp to 75,000 rmp. GENERAL FEATURES OF PNEUMATIC TOOLS Pneumatic tools represent a large number of airoperated machines that are usually transported to a work area,rather than transporting the work to the tool(as in machining some metals by machine tools).In many instances,the tool is either held entirely by the hands or guided and controlled by tool may be a manufacturing plant,the an outdoor construction job,the pressor may be a manufacturing plant,the pressor may be from the pressor system is fed by means of distribution piping through a filter,a pressure regulator,and a from the lubricator may be fed through a flexible hose to the pneumatic tools are usually supplied with pressed air at about 90 pounds per square inch, are three hroad classifications of pneumatic tools(1)rotary,(2)piston,and(3)percussion. In a typical rotary pneumatic tool,the air enters the tool handle,passes through a manually operated control valve,passes through the end plates,and enters a chamber of a vanetype air air pushes the rotor form the inlet to the the outlet,the air is discharged into the typical rotary air motor possesses three to five blades,rotates at speeds of 4000 to 25,000 rpm,and develops up to 3 spindle fastened to the rotor drives a set of plaary reduction gears to supply the desired output output shaft may be equipped with a chuck for holding a drill,grinder,or some other tool. The pistontype air motor is used for tools when higher horsepower and slower speeds are desired,as in hoists and heavydrills. The percussion or hammertype air motor is found in chippers, riveters,and pavement this type of machine,the air usually passes through an exhaust valve,and then is exhausted into the piston is moved back and the driving 8 stroke,the inertia of the piston provides a hammer blow or impact to a drill,a chisel,or a bit. Compressed air permits the use of tools are relatively pact