分别推导得到齿面平移距离和内凹齿面母线方程的计算公式。
Formula to evaluate translation of the tooth-surface and the equation to describe the generatrix of the negatively cambered sooth-surface were derived respectively.
用于外齿轮加工的径向剃齿刀，其齿向曲线为内凹超越曲线，这给剃齿刀的刃磨带来了困难。
The tooth curve of a plunge shaving cutter for an external gear is a recess transcendental curve, so it is difficult to grind it.
然而用标准渐开线齿形剃齿刀剃齿后，在工件齿形节点附近会出现不同程度的“中凹”现象。
However, after shaved by shaving cutter with true involute profiles, there are the "mid-concave" phenomena on the pitch points of shaved gear tooth profiles inevitably.
在定量分析了两者对齿轮精度的综合影响之后，运用反补偿法预先修正齿形凹模，并进行了齿模电极的设计。
Quantitatively analyzing the effect of two to the profile of tooth, the inversing compensation method is then put forward to modify the die cavity and the electrode is designed.
用有限元方法，对双圆弧弧齿锥齿轮沿齿长方向齿根应力进行了计算。通过应力计算结果的分析，得出了凸、凹两齿侧应力沿齿长的分布规律。
Through the calculation of the finite element method(FEM) models for double circular arc profile spiral bevel gear, the stress changing pattern along the length of the tooth is obtained.
实践证明：设计出的剃齿刀寿命长，加工质量好，对中凹现象有明显改善。
Facts have proved that the designed shaving cutter is long-lived, good in machining quality, and effective on correcting centre-concave.
分析齿轮摆辗凹模的失效形式，并且通过改变直齿圆锥齿轮摆辗的工艺参数的有限元模拟，探讨了凹模进给量、摩擦系数和摆头倾角的改变量对凹模应力影响以及对凹模失效形式的影响。
The failure form of rotary roll cavity die for straight tooth bevel gear was analyzed, and the finite element simulation method was employed to change the processing parameter of rotary roll.
结果内凹齿钥匙开锁痕迹特征明显，且被钥匙机复制后能留下复制痕迹。
Result There are distinctive marks on concave keys when normally used and when used as guide keys.
推导了进入双点啮合区的法面啮合角公式，采取了独特的剃齿刀修形方式，从设计和修形上下功夫杜绝剃齿中凹的产生。
And the normal engagement angle of approaching double-point tooth area is deduced. The special dressing method of shaving cutter has been adopted.
系统给出了四种防止剃齿中凹的方法，用户可根据不同的生产条件进行选择，对每种方法的应用，系统软件都给予了指导。
Users can select from these methods according to their production condition. There is instruction for applying each method in the expert system.
方法制作内凹齿钥匙正常开锁和被钥匙机复制后的样本，用光学显微镜拍照固定痕迹特征。
Method Samples of manipulated keys and keys that used as guide in a duplication process are made. Marks and striations on the keys are photographed and analyzed by light microscopy.
钢丝弹簧固定在多条环型隔离凹槽上，内四周有凹齿，与电源插头接触好。
Steel wire springs are fixed on a plurality of annular isolated concave grooves, and concave teeth are around the annular isolated concave grooves inside, and well contacted with the power plug.
钢丝弹簧固定在多条环型隔离凹槽上，内四周有凹齿，与电源插头接触好。
Steel wire springs are fixed on a plurality of annular isolated concave grooves, and concave teeth are around the annular isolated concave grooves inside, and well contacted with the power plug.
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