To solve the problem on the market that it is difficult to use the current grooving power head to process wide slot,this pa￣per designs top chamfered tool carrier with high rigidity in modular machine tool to solve the big radial force at curling wide groov in the general grooving power head,strengthen the fixture clamping rigidity and head cutting rigidity,improve the stability of machining and the cutting tool service life.%为解决目前市场上一般挖槽动力头难以加工宽槽的问题，设计一种在组合机床上采用带有顶尖的高刚性挖槽刀架装置，解决了一般挖槽动力头加工宽槽切削时径向力太大、夹具夹持刚性和刀架切削刚性不够的问题，提高了加工的稳定性和刀具的使用寿命。
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