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introduction：1、Selection of reference The selection of the gear machining reference is often different due to the different structural shapes of the gear。The shaft gear is mainly located by the vertex hole；For hollow shaft，After the center hole is drilled，Use the bevels at both ends for positioning；When the aperture is large, cone plug is used。High precision of vertex positioning，And it can achieve the coincidence and unification of the datum。The following two kinds of positioning are often used in the machining of the tooth surface of the perforated gear、Clamping mode。 （1）Inner hole and end face positioning This positioning method is based on the positioning of the inner hole of the workpiece，Determine positioning position，And then the end face Axial positioning reference，And clamp against the end face。This enables the positioning of the reference、Design basis、Assembly datum and measurement datum coincide，High positioning accuracy，Suitable for mass production。However, the manufacturing accuracy of the fixture is requir
2015-01-06 Reading quantity 1588
introduction：First, the overall error curve of the gear is mapped(Referred to as the overall error diagram)﹐All kinds of single error and comprehensive error are analyzed﹐Evaluating gear accuracy﹐Gear measurement techniques to analyze transmission quality and process errors。The global error diagram is a type of error that shows the shape and position of all the working tooth surfaces on a certain cross section or tooth width of the gear under test﹐Im going to draw it as zero in the same coordinate﹐And according to the tooth surface of each point meshing sequence of the graph。1970Huang Tongnian, a Chinese engineer, invented the overall error chart of surveying and mapping﹑Transmission quality analysis and process error analysis and other methods﹐The global error measurement technique is developed systematically。This technique has been applied to the measurement of cylindrical gears﹐And began to extend to bevel gear measurement。
2015-01-08 Reading quantity 3003
introduction：Reducer tooth fracture reason： That doesnt happen very often，But it is the most serious，Because this will completely disable the gear teeth of the reducer，It occurs more often in the root of the tooth。Tooth fracture is usually caused by heavy load or metal fatigue。The fracture surface caused by excessive load is rough，graininess。More ductile metals have fibrous fractures。The cause of this type of fracture may be excessive impact load、Axes not parallel、bearing[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It is a part that holds and reduces the friction coefficient of load during mechanical transmission。Can also be said，When other parts move relative to each other on the shaft，A device used to reduce the coefficient of friction during power transmission and to keep the center of the shaft fixed。]breakdown、Or metal particles fall into the reducer gear tooth meshing parts, etc。 Fractures caused by metal fatigue are usually small cracks that spread over a long period of time。The fracture is very smoot
2015-01-08 Reading quantity 3017
introduction：Soft tooth point helical gear drop low speed machine how to maintain Jin Longtai reducer tell you：： 1It usually stops:Check the temperature of low speed machine:The temperature did not drop when mineral oil was applied95℃,The oil has not been affected100℃The low speed machine checks the oil level of the wet oil with abnormal noise and signs of leakage,When there is no foot, cut off the moisturizing oil。
2015-01-10 Reading quantity 2936
introduction：Radius This standard gives geometric codes for marking gear parameters。It consists of two tables： ——Primary code，Consists of a single basic letter（See table1）； ——subscript，Used to qualify the main code（See table2、table3Sum table4）。 2designation 2.1 Combination rules of geometric codes The main rules are as follows： a) A code name consists of a primary code name or a primary code name with one or more subscripts、Or a superscript。 b) The primary code can be a single uppercase or lowercase letter。The letters should be Latin letters in italics or Greek letters in italics。 c) The number subscript is an integer、Decimals or Roman numerals printed in Roman script。A code name can have only one numeric subscript。 d) All subscripts should be on the same line，And below the main code。
2015-01-11 Reading quantity 3015
introduction：chilun jiagong daojuGear cutting toolgear cutting toolMachining various cylindrical gears、Bevel gears and other toothed workpieces（Sighting gear）Cutting tools with teeth。Gear processing tools are divided into two categories according to the processing objects: cylindrical gear processing tools and bevel gear processing tools。Bevel gear cutting tools are divided into straight bevel gear cutting tools according to the type of gear being processed、Spiral bevel gear tool and extended epicycloid bevel gear tool 3class。Cylindrical gear machining tool according to the processing principle can be divided into two kinds of forming gear tool and developing gear tool。Gear forming tool The current Angle is0°when
2015-01-21 Reading quantity 2935
introduction：(one)Influence of gear machining error on noise of reducer。Reducing and controlling gear noise is the fundamental of reducing gear motor noise。To reduce gear noise，The structural design and gear precision should be considered from two aspects。 1、Low noise gear structure design requirements。The influence of gear structure design on noise is very important，The ideal design is：Increase the bending strength of the tooth as much as possible，Select the large coefficient of displacement and the appropriate spiral Angle，Increase the coefficient of engagement，So as to achieve the purpose of reducing noise。
2015-01-22 Reading quantity 2999
introduction：A rotary pump that depends on the working volume change and movement formed between the pump cylinder and the meshing gear to transport the liquid or pressurize it(Sight-seeing pump)。Gear pump has two kinds of structure, external meshing type and internal meshing type。External gear pump is divided into double gear pump﹑3Gear pump and5Gear pump﹐External gear pump is most commonly used。figure External double gear pump It is the structure of external meshing double gear pump。A pair of meshing gears and a pump cylinder separate the suction chamber from the discharge chamber。Gear time﹐The volume between the teeth at the side of the suction cavity is gradually increased﹐Pressure reduction﹐The liquid enters between the teeth under the action of pressure difference。As the gears turn﹐The fluid between each tooth is carried to the discharge chamber。At this time, the volume between the teeth at the meshing of the tooth on the side of the exhaust cavity gradually shrinks﹐And expel the liquid。Gear pumps are suitable for t
2015-01-24 Reading quantity 2921
introduction：feiyuan chilun chuandongNon-circular gear drivenon-circular gearingA gear drive in which the pitch surface of at least one gear is not a rotary surface。When a pair of non-circular gears mesh，Its instantaneous transmission ratio changes periodically according to a certain law。figure1[Non-circular gear]Middle two non-circular gears1and2The pitch curves are respectivelyJ1andJ2，When the two wheels are engaged，J1andJ2Do pure rolling without sliding。Its instantaneous transmission ratio is：12= 1/ 2=2/1，Shizhong 1and 2Is the instantaneous angular velocity of the two rounds，1
2015-01-25 Reading quantity 2951
introduction：A gear drive consisting of a pair of cycloidal gears。The tooth profile of a cycloidal gear is composed of an endocycloid or an epicycloid (In the picturea[The tooth profile of a cycloidal gear])。Round as a ballS Roll outside the pitch circle to form the top curvebc，Roll inside the pitch circle to form the root curve；same，Round as a ballQ Roll on the inside to form the root curve，Roll on the outside to form a crest curve。Such gear tooth contact transmission is equivalent to a pair of friction wheels of size and rolling each other。Cycloidal gear drives are mostly used in clocks and certain instruments，Compared with the general gear drive，It is characterized by：①During transmission, the concave epicycloid in a pair of tooth profiles engages with the convex epicycloid，Therefore, the contact stress is small，Uniform wear；②The overlap degree of tooth profile is larger，It is beneficial to improve the bending strength；③No root cutting phenomenon，The minimum number of teeth is unlimited，Compact structure，A larger trans
2015-01-27 Reading quantity 2943
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