A head-exchangeable rotary cutter

A rotary tool and interchangeable technology, which is applied in milling cutters, manufacturing tools, metal processing equipment, etc., can solve problems such as reduced connection strength, reduced tool thread interface strength, safe processing, and impact on tool life.

CN112974943BActive Publication Date: 2022-04-12XIAMEN GOLDEN EGRET SPECIAL ALLOY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2022-04-12

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Abstract

The invention discloses a head exchangeable rotary cutter, which comprises a cutter head part and a cutter bar part; one end of the cutter head part is provided with a cutting part, and the other end is provided with an external thread connection part; the cutter bar part One end of one end is provided with an internally threaded connecting portion and matches with the externally threaded connecting portion of the cutter head component; in the externally threaded connecting portion of the cutter head component, along the axial direction of the externally threaded connecting portion, the thread is larger The diameter remains unchanged, the small diameter of the thread changes in a taper, and gradually decreases from the inside to the outside, the distance between the crests of the same side of adjacent thread teeth is equal, and the width of the crests of each thread is the same; the cutter head In the externally threaded connection portion of the component, the distance between the roots of adjacent screw teeth changes in a certain manner along the axial direction of the externally threaded connection portion. The invention can ensure that the thread pretightening force of the cutter head part is large enough to increase the strength of the interface between the cutter head part and the cutter bar part, realize stable processing, and realize precise positioning of the cutter.
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Description

technical field

[0001] The invention relates to the technical field of cutters, in particular to a head-exchangeable rotary cutter. Background technique

[0002] In order to improve the economy of the tool, head-exchangeable rotary tools are widely used. One of the main features of this type of tool is that the head part (the part containing the cutting edge) and the shank part (the part containing the shank) are independent , that is, the cutter head part and the tool bar part are two independent parts that can be disassembled. When in use, the cutter head part and the tool bar part are assembled together to form an integral rotary tool for cutting. , after the cutting edge processing of the cutter head parts reaches the scrap standard, the cutter head parts (that is, the cutting edge) can be replaced, and the tool bar parts (ie, the handle) can be used repeatedly, so that the tool bar parts can also be used economically. It can be processed and manufactured with more dura...

Examples

Embodiment 1

[0032] see Figure 1 to Figure 6 As shown, a head exchangeable rotary cutter of the present invention includes a cutter head part 1 and a tool bar part 2; one end of the cutter head part 1 is provided with a cutting part 11, and the other end is provided with an external thread connection part 12. In this embodiment, the cutting edge 111 of the cutting part 11 is integrated with the cutter head part 1; The threaded connection part 12 fits together. When the cutter head part 1 is matched with the cutter bar part 2, the contact surface 15 of the cutter head part 1 (that is, the protruding end surface at the junction of the cutting part 11 and the external thread connection part 12) and the The contact surface 22 of cutter bar part 2 (being the end face of one end of cutter bar part 2) closely contacts, and its roughness of the contact surface 15 of cutter head part 1 and the contact surface 22 of cutter bar part 2 is no more than 0.8, like this, can Ensure the close contact bet...

Embodiment 2

[0046] see Figure 7 As shown, a head exchangeable rotary cutter of the present invention differs from Embodiment 1 in that the cutter head part 1 is provided with an indexable cutting edge, specifically, the cutter head part 1 passes through The screw 4 is equipped with an indexable insert 3, and the indexable insert 3 has an indexable cutting edge 31 thereon.