(5）operation position（工位)In ordertoreducethe number of setups, a rotational worktable or fixture isusuallyusedtomakesequentialmachining indifferentpositionspossiblefromasinglesetup.ThejobperformedinonepositioniscalledoneoperationpositionDemonstrationofoperationoperationstep,positionandcuttingpass
（5）operation position（工位） In order to reduce the number of setups, a rotational worktable or fixture is usually used to make sequential machining in different positions possible from a single setup. The job performed in one position is called one operation position. Demonstration of operation, operation step，position and cutting pass
1.1.2.2ImpactofproductiontypeonprocessplanningProcess planning are highly affected bythe production typeWhen the production type changes, the production organizationand management,the layout ofworkshop andmachinetools,theprocess method of the raw material, the manufacturing equipment,such askinds of cuttingtool,fixture and inspectiontools andthetechnical level of theoperators will also varied accordinglyTherefore,before process planning,a concise explanation of theeffectofproductionbatchsizewillbegiven
1.1.2.2 Impact of production type on process planning Process planning are highly affected by the production type. When the production type changes, the production organization and management, the layout of workshop and machine tools, the process method of the raw material, the manufacturing equipment, such as kinds of cutting tool, fixture and inspection tools and the technical level of the operators will also varied accordingly. Therefore, before process planning, a concise explanation of the effect of production batch size will be given
Production type refers to the specialized classification of anenterprise in respect of a workshop, manufacturing line or group, workplace, and so on. Generally, it can be classified into 3 types, which are,(1) Single productionThenumber of workpieceswith different structureordifferentdimensions is only one at a time, or only in small quantity.Forexample,themanufacturingofheavy-dutymachines,specializedmachines and new products are all done in small quantity
（1）Single production Production type refers to the specialized classification of an enterprise in respect of a workshop, manufacturing line or group, work place, and so on. Generally, it can be classified into 3 types, which are, The number of workpieces with different structure or different dimensions is only one at a time, or only in small quantity. For example, the manufacturing of heavy-duty machines, specialized machines and new products are all done in small quantity
(2)EBatch productionIn one year, the same products are manufactured repeatedly inbatches.Forexample,themanufacturing ofmachinetoolsischaracterizedby batch production. The number of the same products in onebatch is called the batch size.Accordingto the batch size,it canbefurtherclassifiedinto:small batch ---the characteristic is similar to that of singleproduction;large batch --- the characteristic similar to large quantityproduction;medium batch --- the characteristic is between of single and largequantity production
（2） Batch production In one year, the same products are manufactured repeatedly in batches. For example, the manufacturing of machine tools is characterized by batch production. The number of the same products in one batch is called the batch size. According to the batch size , it can be further classified into : small batch -the characteristic is similar to that of single production； large batch - the characteristic similar to large quantity production ； medium batch - the characteristic is between of single and large quantity production
(3) Large quantity productionThe quantity of each part being produced is large, and many workplaces often manufacture the same product, carrying out the sameoperations on each example of theproduct repeatedlyFor example, the manufacturing of vehicles, trucks and bearingsare all characterized by largequantityproduction
（3）Large quantity production The quantity of each part being produced is large, and many work places often manufacture the same product, carrying out the same operations on each example of the product repeatedly . For example, the manufacturing of vehicles, trucks and bearings are all characterized by large quantity production