Penknife spiral knife production method

Penknife spiral knife production method

  • CN 1,850,425 B
  • Filed: 05/26/2006
  • Issued: 07/04/2012
  • Est. Priority Date: 05/26/2006
  • Status: Active Grant
First Claim
Patent Images

1. pencil sharpener circular knife production method;

  • It is characterized in that in turn including the following steps;

    A, the wire drawing of high carbon tool round steel, B, punch press blanking, C, the softening processing of high temperature nodularization;

    D, flat head chamfering;

    E, fine grinding cylinder, F, alramenting are handled, and cold extrusion die and cold extrusion method that G, usefulness make in advance are processed into the circular knife finished product;

    The cold extrusion die manufacturing approach is on gear-hobbing machine, to roll the copper electrode identical with circular knife earlier, with copper electrode on the electric pulse lathe to sintered-carbide die material processing modelling, the carbide alloy after the moulding is carried out the chamfer grinding polishing, last gland assembling;

    Mould after the assembling is by outer steel sleeve and be sleeved on carbide alloy material seat, internal-gear type carbide alloy shaping mould, the Cr12 quenching guide seat in this outer steel sleeve mesopore, and supporting cold extrusion drift is formed;

    Cold extrusion drift also is furnished with punch holder.

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