CN103551681A

CN103551681A - Special-shaped screwer

Info

Publication number: CN103551681A
Application number: CN201310542002.9A
Authority: CN
Inventors: 朱胜雷
Original assignee: Wuxi Yutian Precision Tool Co Ltd
Current assignee: Wuxi Yutian Precision Tool Co Ltd
Priority date: 2013-11-05
Filing date: 2013-11-05
Publication date: 2014-02-05

Abstract

The invention relates to the technical field of hardware tools, in particular to a special-shaped screwer. The special-shaped screwer disclosed by the invention comprises a tool holder and a tool bar which are integrally arranged, and a tool bit arranged on the inner side of the front end of the tool bar, wherein the tool bit comprises a first cutting edge, a second cutting edge and a third cutting edge which are connected in sequence into a threaded tooth form; a plus 5-degree included angle is formed between the first cutting edge and a planar Y axis; a front finishing edge and a back finishing edge are symmetrically formed on both sides of the tool bit; minus 3-degree included angles are formed between the front finishing edge and a planar X axis as well as between the back finishing edge and the planar X axis; the front end of the front finishing edge on the tool bit is provided with a chamfer edge; a plus 30-degree included angle is formed between the chamfer edge and the planar Y axis. The special-shaped screwer is reasonable in structure, the overall strength of a tool is enhanced, the internal thread machining efficiency can be effectively increased, special-shaped screw threads can be molded at one time by cutting, the machining flow is simplified, and the processes of thread turning, burr removing and chamfering are realized.

Description

A kind of abnormal screw thread cutter

Technical field

The present invention relates to hardware and cutting-tools technical field, particularly a kind of abnormal screw thread cutter.

Background technology

Common internal thread machining generally adopts carbide-tipped milling cutter and frame profile milling cutter at present, and internal thread milling cutter comprises handle of a knife, knife bar and cutter head, and workpiece and milling cutter are rotated and axial machining under Digit Control Machine Tool drives.Milling cutter during internal thread machining need go deep into endoporus and cut, so the knife bar of milling cutter is longer, and in order to guarantee the intensity of milling cutter, often knife bar takies more processing space, causes the minimizing in chip removal space, easily causes tool wear and crumbles.And chip removal freely can not produce burr and cut at the endoporus processing and port, need tool changing deburring chamfering again, reduced production efficiency.

Summary of the invention

The object of the invention is to defect and deficiency for prior art, a kind of abnormal screw thread cutter rational in infrastructure, easy to use is provided.

For achieving the above object, the present invention is by the following technical solutions:

A kind of abnormal screw thread cutter of the present invention, comprise the handle of a knife and the knife bar that are wholely set, be located at the cutter head of knife bar front end inboard, described cutter head comprises the first cutting edge, the second cutting edge and the 3rd cutting edge that is in turn connected into thread tooth, and between the first cutting edge and plane Y-axis, is positive 5 degree angle settings; Cutter head bilateral symmetry is provided with preposition wiper edges and rearmounted wiper edges, is negative 3 degree angle settings between preposition wiper edges and rearmounted wiper edges and plane X axle; On described cutter head, preposition wiper edges front end is provided with chamfering blades, is positive 30 degree angle settings between chamfering blades and plane Y-axis.

Further, described knife bar is eccentric cylinder structure, and knife bar top is provided with the clearance surface parallel with processing plane, and clearance surface and handle of a knife adjacent part are provided with arc-shaped transition.

Further, described knife bar front end outside offers and holds bits chamfering.

Further, described handle of a knife is provided with the lock screw face parallel with processing plane.

Beneficial effect of the present invention is: the present invention is rational in infrastructure, and cutter bulk strength is better, can effectively improve internal thread machining efficiency, can one-shot forming for abnormal screw thread cutting, simplify work flow, and realize a cutter and complete cutting thread, deburring, chamfer angle technique.

Accompanying drawing explanation

Fig. 1 is overall structure schematic diagram of the present invention;

Fig. 2 is the local structure for amplifying schematic diagram of cutter head of the present invention.

In figure:

1, handle of a knife; 2, knife bar; 3, cutter head; 11, lock screw face;

21, hold bits chamfering; 22, clearance surface; 31, the first cutting edge; 32, the second cutting edge;

33, the 3rd cutting edge; 34, preposition wiper edges; 35, rearmounted wiper edges; 36, chamfering blades.

The specific embodiment

Below in conjunction with accompanying drawing, the present invention is further illustrated.

As Fig. 1, shown in Fig. 2, a kind of abnormal screw thread cutter of the present invention, comprise the handle of a knife 1 and the knife bar 2 that are wholely set, be located at the cutter head 3 of knife bar 2 front end inboards, described handle of a knife 1 is provided with the lock screw face 11 parallel with processing plane, when handle of a knife 1 is arranged on lathe cutter saddle, by screw, is held out against on lock screw face 11 handle of a knife 1 is fixedly connected with knife rest; Knife bar 2 is eccentric cylinder structure, has increased the intensity of knife bar 2, avoids, in working angles, shake occurs cutter head 3 is damaged; Knife bar 2 tops are provided with the clearance surface parallel with processing plane 22, clearance surface 22 is provided with arc-shaped transition with handle of a knife 1 adjacent part, knife bar 2 front end outsides offer and hold bits chamfering 21, the smear metal that cutter head 3 cuttings produce is discharged by clearance surface 22 via holding after bits chamfering 21 produces, and arc-shaped transition can make chip removal more smooth and easy, avoid smear metal to get lodged on knife bar 2.

Described cutter head 3 comprises the first cutting edge 31, the second cutting edge 32 and the 3rd cutting edge 33 that is in turn connected into abnormal screw thread profile of tooth, and between the first cutting edge 31 and plane Y-axis, be positive 5 degree angle settings, and then improved the impact strength of cutter head 3, reduce the situation of quick-fried cutter; Cutter head 3 bilateral symmetry are provided with preposition wiper edges 34 and rearmounted wiper edges 35, between preposition wiper edges 34 and rearmounted wiper edges 35 and plane X axle, be negative 3 degree angle settings, before and after during cutting internal thread, wiper edges can be removed the flanging burr on thread, reduce the cutting pressure of main cutting edge, improve the fineness of product, omitted final deburring operation, enhanced productivity; On described cutter head 3, preposition wiper edges 34 front ends are provided with chamfering blades 36, between chamfering blades 36 and plane Y-axis, be positive 30 degree angle settings, chamfering blades 36 is carried out chamfering deburring at port after cutting thread finishes, and without switching cutter, carries out again, and has reduced the time of processing.

The above is only better embodiment of the present invention, and the equivalence of doing according to structure, feature and principle described in patent claim of the present invention therefore all changes or modifies, and is included in patent claim of the present invention.

Claims

1. an abnormal screw thread cutter, comprise the handle of a knife (1) and the knife bar (2) that are wholely set, be located at the cutter head (3) of knife bar (2) front end inboard, it is characterized in that: described cutter head (3) comprises the first cutting edge (31), the second cutting edge (32) and the 3rd cutting edge (33) that is in turn connected into thread tooth, and between the first cutting edge (31) and plane Y-axis, be positive 5 degree angle settings; Cutter head (3) bilateral symmetry is provided with preposition wiper edges (34) and rearmounted wiper edges (35), is negative 3 degree angle settings between preposition wiper edges (34) and rearmounted wiper edges (35) and plane X axle; Upper preposition wiper edges (34) front end of described cutter head (3) is provided with chamfering blades (36), is positive 30 degree angle settings between chamfering blades (36) and plane Y-axis.

2. abnormal screw thread cutter according to claim 1, it is characterized in that: described knife bar (2) is eccentric cylinder structure, knife bar (2) top is provided with the clearance surface parallel with processing plane (22), and clearance surface (22) is provided with arc-shaped transition with handle of a knife (1) adjacent part.

3. abnormal screw thread cutter according to claim 1, is characterized in that: described knife bar (2) front end outside offers and holds bits chamfering (21).

4. abnormal screw thread cutter according to claim 1, is characterized in that: described handle of a knife (1) is provided with the lock screw face (11) parallel with processing plane.