CN210359300U

CN210359300U - Chamfering tool

Info

Publication number: CN210359300U
Application number: CN201920987745.XU
Authority: CN
Inventors: 马小光; 邢程; 孙超; 李天源; 郭旭华; 马辉; 徐红飞; 王彦文; 张伟
Original assignee: Beijing North Vehicle Group Corp
Current assignee: Beijing North Vehicle Group Corp
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-04-21
Anticipated expiration: 2029-06-28

Abstract

The utility model discloses a chamfering tool belongs to the machining field, provides a special tool to reverse side drill way chamfer, and this cutter is by eccentric cutter arbor, eccentric tool bit, blade, the screw is constituteed. The cutter belongs to an integrated cutter, an eccentric part of the cutter penetrates through a slender hole before cutting, and then the rotation center of the cutter is coincided with the center of the slender hole to perform reverse boring type chamfering processing. The utility model discloses the reverse side drill way chamfer cutter has been designed and made by oneself to the technological method of the design thought of borrowing from eccentric cutter and reverse boring, has optimized process scheme, has improved machining efficiency, has promoted the qualification rate.

Description

Chamfering tool

Technical Field

The utility model belongs to the cutter field relates to a chamfering tool, especially relates to the chamfer in the hole of spare part inside.

Background

In the processing process of products, hole processing is very common, and orifices are often required to be chamfered, but when the orifices on the reverse side of the holes (orifices on the inner end face of the part) are chamfered, the processing is complex and difficult. The common processing methods are two: firstly, the detachable combined chamfer cutter is used, the manufacturing cost of the cutter is low, the used equipment is simple, but the cutter head needs to be repeatedly and manually assembled and disassembled in the processing process, and the processing efficiency is not high; secondly, the inlet cutter in the market has the automatic reverse scraper with the cutter holder, the cutter has the advantage of good rigidity, the cutter needs to be customized, the delivery cycle is long, the price is high, the cutter maintenance difficulty is large, and the production efficiency is influenced.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model aims at solving the problem that the process is complicated, difficult when hole type reverse side drill way chamfer adds man-hour, machining efficiency is low, has provided a chamfering tool, and chamfer machining method, designs an eccentric formula anti-boring chamfering tool promptly and accomplishes this course of working, reduces processing cycle, improves machining efficiency.

(II) technical scheme

In order to solve the problems, the chamfering tool of the utility model comprises an eccentric tool bar, a tool bit, a blade and a screw; the eccentric cutter bar comprises an upper half part and an upper half part, wherein the axis of the lower half part is superposed with the axis of the upper part, namely the lower half part is of an eccentric structure relative to the upper part; the cutter head and the eccentric cutter bar are of an integral structure and are connected to the end part of the lower half part of the eccentric cutter bar; the blade is arranged at the cutter head; the end part of the lower half part of the cutter bar is provided with an arc groove, one side wall of the arc groove is a vertical plane, and the wall is provided with a cutter head through a screw; the axial section of the blade is triangular; one side of the blade is used as an outer inclined cutting edge which faces obliquely upwards.

Furthermore, the groove wall of the arc groove is provided with an arc notch corresponding to the end part of the inner inclined cutting edge of the blade.

Furthermore, the maximum diameter of the eccentric cutter bar and the cutter head after combination is smaller than the bore diameter of the machined chamfer.

Furthermore, the size of the arc groove at the end part of the lower half part of the cutter bar is a part which occupies one fourth of the cross section of the end part; the wall of the arc groove is provided with a cutter head through a screw.

Further, the axial section of the blade is an equilateral triangle.

Furthermore, the left side section of the cutter head is a semicircle, and the right side section of the cutter head is a semiellipse.

Further, according to the maximum circumferential size of the orifice chamfer, the minimum turning radius of the cutter head, the installation angle and the size of the blade, the maximum diameter size of the cutter rod is obtained.

The chamfering method for carrying out reverse boring machining by adopting the chamfering tool is characterized by comprising the following steps: clamping a cutter on a cutter handle of a machine tool, and rotating a cutter head to a determined angle; aligning the center position of the width direction of the cutter head with the center of the hole, and deeply inserting the cutter into the hole to enable the cutter head to completely penetrate through the hole; the cutter horizontally moves after passing through the hole, so that the rotation center of the cutter is superposed with the center of the hole, namely the rotation diameter of the cutter head is larger than the aperture; the tool processes a chamfer upwards, and then the tool reversely exits according to the entering path.

(III) advantageous effects

The utility model has the advantages that: the problems of complex processing and low efficiency of hole reverse side orifice chamfering are solved. The processing technology is optimized, and the product percent of pass is ensured. The utility model discloses the reverse side drill way chamfer cutter has been designed and made by oneself to the technological method of the design thought of borrowing from eccentric cutter and reverse boring, has optimized process scheme, has improved machining efficiency, has promoted the qualification rate.

Drawings

FIG. 1 is a front view of the chamfering tool of the present invention, namely an eccentric reverse boring chamfering tool;

FIG. 2 is a schematic diagram of a process for chamfering a reverse side hole by a cutter.

Wherein, the eccentric cutter bar 1, the (eccentric) cutter head 2, the blade 3 and the screw 4.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. The utility model discloses a chamfering tool, an eccentric formula reverse boring chamfering tool who is used for reverse side drill way chamfer promptly. The composition is as follows: eccentric cutter arbor 1, (eccentric) tool bit 2, blade 3, screw 4.

The eccentric cutter bar 1 comprises an upper half part and an upper half part, wherein the lower half part is in an eccentric structure relative to the upper part (the axis of the upper half part);

the (eccentric) cutter head 2 and the eccentric cutter bar are of an integral structure and are connected to the end part of the lower half part of the eccentric cutter bar;

the blade 3 is arranged on the cutter head; the quarter part of the end part of the lower half part of the cutter bar is provided with a circular arc groove for installing the cutter blade.

The section of the blade 3 is triangular; one side of the blade 3 serves as an outer inclined edge, and the outer inclined edge faces obliquely upward (the outer inclined edge of the blade 3 of the common cutter faces downward);

said screw 4 is used for fixing the blade 3.

And a reverse boring processing mode is adopted during chamfering processing, and in order to ensure that the cutter passes through a hole smoothly during cutter design, the maximum diameter of the combined eccentric cutter bar 1 and the combined cutter head 2 is required to be smaller than the aperture. Secondly, the maximum diameter of the cutting head 2 needs to be close to the hole diameter in order to improve the machining efficiency. And determining the maximum circumferential size of the back hole chamfer according to the drawing size, thereby determining the minimum turning radius of the cutter head 2, the installation angle and the model size of the blade 3, and reversely deducing the maximum diameter size of the eccentric cutter bar 1.

The groove wall of the arc groove is provided with an arc notch which corresponds to the end part of the inner side inclined cutting edge of the blade (3) and is used for yielding the end part of the cutting edge.

The left side section of the cutter head is a semicircle, and the right side section of the cutter head is a semiellipse.

When the cutter is used for machining a reverse orifice chamfer, the cutter is clamped on a tool holder of a machine tool, the eccentric cutter head 2 is rotated to a set angle (by utilizing the orientation function of a machining center), and the eccentric cutter is deeply inserted into a hole at the central position of the eccentric cutter head 2, so that the eccentric cutter head 2 completely penetrates through the hole. The cutter passes horizontal migration behind the hole, makes cutter centre of rotation and hole center coincidence, and the diameter of gyration of eccentric tool bit 2 can be greater than the aperture this moment, and the cutter upwards processes, and the back is according to the reverse back-off of entering route after accomplishing, accomplishes reverse side drill way chamfer processing.

Claims

1. A chamfering tool is characterized by comprising an eccentric tool bar (1), a tool bit (2), a blade (3) and a screw (4);

the eccentric cutter bar comprises an upper half part and an upper half part, wherein the axis of the lower half part is superposed with the axis of the upper part, namely the lower half part is of an eccentric structure relative to the upper part;

the cutter head (2) and the eccentric cutter bar are of an integral structure and are connected to the end part of the lower half part of the eccentric cutter bar;

the blade (3) is arranged at the position of the cutter head; the end part of the lower half part of the cutter bar is provided with an arc groove, one side wall of the arc groove is a vertical plane, and the wall is provided with a cutter head through a screw;

the axial section of the blade (3) is triangular; one side of the blade (3) is used as an outer inclined cutting edge which faces to the upper direction.

2. The chamfering tool according to claim 1, wherein the groove wall of the circular groove has a circular notch corresponding to the end of the inner inclined edge of the insert (3).

3. A chamfering tool according to claim 1, characterized in that the maximum diameter of the eccentric shank (1) in combination with the cutting head (2) is smaller than the diameter of the bore in which the chamfer is to be machined.

4. The chamfering tool according to claim 1, wherein the circular arc groove of the lower half end of the shank is a quarter of the end in cross section; the wall of the arc groove is provided with a cutter head through a screw.

5. The chamfering tool according to claim 1, characterized in that the insert (3) is equilateral triangular in axial cross section.

6. The chamfering tool according to claim 1, wherein the left side cross-section of the tool bit (2) is a semicircle and the right side cross-section is a semi-ellipse.