【正文】 不足，如困油現(xiàn)象比較嚴(yán)重、流量和壓力脈動(dòng)較大、徑向力不平衡、泄漏大、噪聲高及易產(chǎn)生氣穴等缺點(diǎn)，這些特性和缺點(diǎn)都直接影響著齒輪泵的質(zhì)量。 關(guān)鍵詞 ：機(jī)械制造，通用夾具，專(zhuān)用夾具，鉆床夾具，齒輪泵，電動(dòng)機(jī) ABSTRCT At the machine manufacture machinefinishing, the examination,the assembly, the welding and the heat treatment and so on in the coldhot technological process, are using the massive jigs, with installsthe processing object, enable it to hold the correct position,guarantees the ponents and the product quality, and enhancementproduction efficiency. Processes the work piece when the engine bed, in order to guaranteethe processing precision, must correctly install the work piece,causes its relative engine bed cutting forming movement and thecutting tool holds the correct position, this process is called thelocalization. For because of Cutting force, inertial force , exogenic processand so on the gravity is not destroyed the work piece already thecorrect position which decides, but also must certainly exert to itclamps the strength, this process is called clamps. Locates theentire process which and clamps to be called the installment. Usesfor on the engine bed to plete the work piece to install the dutythe important craft equipment, is in each kind of jig widely appliesthe engine bed jig. Engine bed jig type very many, among, the use scope broadest generaljig, the specification size are many has standardized, and has thespecialty the factory to carry on the production. But widely uses inthe volume production, specially unit clamp which serves for some workpiece processing working procedure, then needs various factoriesindependently to design the manufacture according to the work pieceprocessing craft. Therefore, the unit clamp design is an importantproduction preparatory work, each is engaged in the processing craftthe work clothes design personnel, all should grasp the elementaryknowledge which the related jig designs. This design main content designs the drilling machine jig, needs thecounter gear pumps on the end cover 2 M8 hole and 1 14? the holecarries on drills truncates the processing. In the article introducedthe work piece in clamps the concrete center the locate mode, locatesthe part and the detent mechanism choice, and clamps the anizationthe choice and the design. The modern high efficiency jig mostly usesmobile clamps, divides according to the strength source has airoperated, the hydraulic pressure, the gas fluid union, the electricitytransmission and so on carries on using the engine bed movement to thework piece clamps. These ways have clamp the movement quickly, clampsthe strength to be stable, may reduce merit and so on worker laborintensity. This design selects the power unit which the electric motorachievement clamps, the utilization mechanical and electricaltransmission control loop control motor the reverse, is processed inorder to the control the work piece in to clamp concrete on addition, in the article has also carried on the simple precisionanalysis and the putation to the jig. On the machine parts often all has each kind of different use and thedifferent precision hole needs to process. In the machinefinishing,the hole process load accounts for the proportion to be bigger, drillbit, Expanding drilling, Reamer and so on decides the size cutting toolprocessing to occupy quite most. By now, besides had to guarantee thehole the size precision, but also had to achieve the hole the positionprecision request. In the single unit small volume production, afterdraws a line adjusts the hole spool thread position method processing,because the drill bit rigidity bad, is easier to distort, thereforethe production efficiency low also the precision is bad. Generally alluses the drilling machine jig in the volume production, the drillingmachine jig calls 鉆模 , through drills the set of guidance cuttingtool to carry on the processing to be possible accurately to determinebetween the cutting tool and the work piece relative position, is 鉆模 main characteristic. Drills when truncates, is processed thehole the size and the precision mainly by the