CN102126147A

CN102126147A - High-flexibility conical high-speed knife handle

Info

Publication number: CN102126147A
Application number: CN 201110047492
Authority: CN
Inventors: 王军; 曹景阳
Original assignee: Yanshan University
Current assignee: Yanshan University
Priority date: 2011-02-28
Filing date: 2011-02-28
Publication date: 2011-07-20
Anticipated expiration: 2031-02-28
Also published as: CN102126147B

Abstract

The invention discloses a high-flexibility conical high-speed knife handle. The knife handle is in a solid short cone structure. The taper of the conical surface of the knife handle is 1:10, the conical surface of the knife handle is provided with 2 to 6 annular grooves, the included angle of the annular groove and the axis of the knife handle is 20 to 45 degrees, the depth of the annular grooves is 3 to 8 millimeters, and the width of the annular grooves is 2 to 3 millimeters. The tail of the knife handle is provided with a blind rivet hole of standard structure. A pull rod on a machine tool tensions the knife handle through a blind rivet arranged in the blind rivet hole, the conical part of the knife handle produces radial shrinkage deformation due to the extrusion of a main shaft conical hole, and the radial shrinkage deformation is the superposition of compressive elastic deformation of the conical surface of the knife handle and bending elastic deformation of an annular entity on the conical surface; and the structure can obviously improve the flexibility of the conical surface of the knife handle. The fit interference magnitude between the main shaft conical hole and the conical surface of the knife handle can be increased, enough connecting rigidity and positioning precision between the knife handle at a higher rotating speed and the main shaft conical hole are ensured, and the limit rotating speed of the knife handle is improved. Compared with a hollow high-speed knife handle, the solid structure can also reduce the overhanging magnitude of a cutter.

Description

Big flexibility conical surface High-speed Tool Shank

Technical fieldThe present invention relates to a kind of handle of a knife that is used to connect lathe and cutter, particularly a kind of handle of a knife that is used for High-speed machining.

Background technologyHandle of a knife is the critical component that connects main shaft and cutter.The tradition handle of a knife is a solid construction, and tapering is 7:24, the single face location.Spindle taper hole expands because of " horn mouth " shape can take place centrifugal action when high rotating speed, form the gap between the spindle taper hole and the handle of a knife conical surface, axial displacement can take place in handle of a knife under the effect of handle of a knife pull bar tightening force, cause its joint stiffness and positioning accuracy to reduce, traditional handle of a knife can't satisfy the requirement of High-speed machining.For satisfying the High-speed machining needs, since last century the eighties several High-speed Tool Shank have appearred latter stage abroad in succession, typical in HSK handle of a knife and KM handle of a knife, handle of a knife conical surface tapering is 1:10, two-sided location, it is a design philosophy to increase the whole flexibility of handle of a knife cone all, increases the matching allowance of the handle of a knife conical surface by hollow short wimble structure, thereby improves the limit speed of handle of a knife.The High-speed Tool Shank that also has other structure, add taper sheath as the triangle body wimble structure, on cylinder handle of a knife body, add stop screw, lay multi-form High-speed Tool Shank such as ball at the handle of a knife conical surface at the handle of a knife end face, the performance of these novel handle of a knifes when high speed all is better than traditional handle of a knife.Their weak point is: it is limited that hollow-core construction increases the flexibility of the handle of a knife conical surface, and hollow-core construction can increase the amount of overhanging of cutter; Along with the further raising of rotating speed, the joint stiffness of handle of a knife and positioning accuracy all can reduce, and have limited the development of High-speed machining to a certain extent.

Summary of the inventionThe object of the present invention is to provide a kind of big flexibility conical surface High-speed Tool Shank that can improve limit speed, guarantee joint stiffness and positioning accuracy.The present invention mainly realizes by leave ring-shaped groove on the handle of a knife conical surface.Concrete scheme of the present invention is: this handle of a knife is solid short wimble structure, and the tapering of the handle of a knife conical surface is 1:10, offers 2～6 ring-shaped grooves on the handle of a knife conical surface, and increasing flexibility, this ring-shaped groove and handle of a knife axis angle are that 20 °～45 °, the degree of depth are 3～8mm.Groove width is 2～3mm.Above-mentioned ring-shaped groove axial spacing can not wait, but preferably equates.Above-mentioned ring-shaped groove number and size are required to determine as calculated by handle of a knife specification and contact stiffness.Above-mentioned handle of a knife afterbody (rear end) is provided with the blind rivet hole of the normal structure that is used to install blind rivet, and the lathe upper connecting rod makes it and spindle taper hole and the two-sided location that contacts of main shaft end face by being located at the blind rivet tension handle of a knife in this blind rivet hole.The handle of a knife tapering is subjected to the spindle taper hole extruding and the radial contraction distortion takes place, and this radial contraction distortion is the stack of distortion of the handle of a knife conical surface elasticity of compression and annular entity elasticity of flexure distortion on it, and this kind structure can obviously improve the flexibility of the handle of a knife conical surface.

The present invention compared with prior art has following advantage:

1, the present invention can increase the matching allowance between the spindle taper hole and the handle of a knife conical surface, guarantee handle of a knife when higher rotating speed and spindle taper hole still have enough joint stiffnesses and positioning accuracy, improved the handle of a knife limit speed.

2, compare with hollow High-speed Tool Shank, solid construction can also reduce the amount of overhanging of cutter.

3, this handle of a knife and existing typical High-speed Tool Shank compatibility.

Description of drawings

Fig. 1 schematic three dimensional views of the present invention.

Fig. 2 cuts open schematic diagram for the main office of looking of the present invention.

The specific embodiment

In the schematic diagram of big flexibility conical surface High-speed Tool Shank illustrated in figures 1 and 2, this handle of a knife 1 is solid short awl handle of a knife, the tapering of its conical surface is 1:10, offering 4 axial spacings on the handle of a knife conical surface equates and two side parallel annular groove 2, the axial angle of groove and handle of a knife is 40 °, and gash depth is that 6mm, groove width are 2.5mm.Above-mentioned handle of a knife afterbody is provided with the blind rivet hole 3 of normal structure.The lathe upper connecting rod is by being located at the blind rivet tension handle of a knife in this blind rivet hole, makes it with spindle taper hole and the main shaft end face is two-sided contacts, and the handle of a knife conical surface 4 and handle of a knife end face 5 are located simultaneously, promptly two-sided location.

Claims

1. one kind big flexibility conical surface High-speed Tool Shank, it is characterized in that: this handle of a knife is solid short wimble structure, the tapering of the handle of a knife conical surface is 1:10, on the handle of a knife conical surface, offer 2～6 ring-shaped grooves, this ring-shaped groove and handle of a knife axis angle are that 20 °～45 °, the degree of depth are that 3～8mm, width are 2～3mm, and this handle of a knife afterbody is provided with the blind rivet hole of normal structure.

2. big flexibility conical surface High-speed Tool Shank according to claim 1 is characterized in that: above-mentioned ring-shaped groove axial spacing equates.