CN219234491U

CN219234491U - Cutter structure for precisely machining chamfer

Info

Publication number: CN219234491U
Application number: CN202222576751.0U
Authority: CN
Inventors: 徐�明; 李婧; 王晓霞
Original assignee: Qingdao Agricultural University
Current assignee: Qingdao Agricultural University
Priority date: 2022-09-28
Filing date: 2022-09-28
Publication date: 2023-06-23
Anticipated expiration: 2032-09-28

Abstract

The utility model provides a cutter structure for precisely machining a chamfer, which comprises the following components: the bottom end of the cutter bar is connected with the rocker arm drill; the positioning column is arranged at the top end of the cutter bar; the countersink blade is arranged on the inner side wall of the first clamping groove of the cutter bar; the chamfering blade is arranged on the inner side wall of the second clamping groove of the cutter bar, and therefore, because the two edges forming the chamfer are positioned and the position of the chamfering cutting tool is fixed, the formed chamfer size is determined, the expected chamfer size can be obtained no matter what equipment is used for chamfering, the problem that the chamfer size precision cannot be controlled due to a plurality of uncontrollable factors when equipment such as a drilling machine is used for chamfering is avoided, and the chamfering cutter has the advantage of improving the chamfering precision.

Description

Cutter structure for precisely machining chamfer

Technical Field

The utility model belongs to the technical field of chamfering processing, and particularly relates to a cutter structure for precisely processing a chamfer.

Background

At present, chamfering is an indispensable part in the design of various parts, and how to ensure the chamfer size is a key means for influencing the service life of parts. Taking hole chamfering as an example, if the chamfering is too small, interference with other parts is easily caused, such as interference between an R angle at the root of a bolt and the hole chamfering; too large chamfer angle can easily cause failure, such as reduction of contact area between the disk part of the bolt and the end surface of the hole, and reduction of locking force of the bolt, and loosening. Taking inner hole processing as an example, the following common technical schemes for chamfering processing are adopted:

1. chamfering is carried out on a drilling machine by using a drill bit (or a chamfering device) with larger diameter, and corresponding chamfering angles are processed by utilizing the conical surface shape of the end part of the drill bit (or the chamfering device), wherein the chamfering formed by the processing is influenced by the following factors: the depth of cut of the drill bit, the angle of the conical surface of the end of the drill bit (or chamfer), the experience of workers, and the size of the part.

2. Chamfering is carried out manually by using a pneumatic trigger and a drill bit (or a chamfering device), and the processing mode is the same as that described above.

3. The numerical control machining center equipment uses a drill (or chamfering device) to chamfer.

However, the above-mentioned type 1 and type 2 machining methods cannot machine precise chamfer dimensions because of uncontrollable factors, which cause uncontrollable chamfer dimensions. With the class 3 processing method, under the condition of ensuring that the sizes of the parts are consistent, the size precision and the mounting position of the chamfering tool are consistent, the chamfering size can be accurate, but the problems of rising cost and decreasing efficiency are caused.

Disclosure of Invention

The utility model provides a cutter structure for precisely machining a chamfer, and solves the problems.

The technical scheme of the utility model is realized as follows: a tool structure for precise chamfering, comprising:

the bottom end of the cutter bar is connected with the rocker arm drill;

the positioning column is arranged at the top end of the cutter bar;

the countersink blade is arranged at one end of the cutter bar;

and the chamfering blade is arranged at the other end of the cutter bar.

As a preferred embodiment, the top end of the cutter bar is provided with a limiting hole, a limiting screw is arranged in the limiting hole in a penetrating way, and the limiting screw is abutted with the end part of the positioning column inserted into the cutter bar.

As a preferred embodiment, the top end side wall of the cutter bar is provided with a first clamping groove in an arc shape, the inner side wall of the first clamping groove is provided with a first positioning hole, a first positioning screw is arranged in the first positioning hole, and the countersink cutter blade is fixedly connected with the inner side wall of the first clamping groove through the first screw.

As a preferred embodiment, the top end side wall of the cutter bar is provided with a second clamping groove, the inner side wall of the second clamping groove is provided with a second positioning hole, a second positioning screw is arranged in the second positioning hole, and the chamfering blade is fixedly connected with the inner side wall of the second clamping groove through the second screw.

As a preferred embodiment, the second clamping groove comprises a first connecting groove and a second connecting groove which are in a fan-shaped arrangement, the second connecting groove is connected to one side of the first connecting groove, the chamfering blade is arranged at the inner side wall of the first connecting groove, and the second connecting groove is located below the chamfering blade.

As a preferred embodiment, both the first and second connection grooves are provided obliquely downward.

As a preferred embodiment, the first connecting groove is provided with an inclined surface provided on an inner side wall of the chamfer blade, and a cross-sectional area of a top end of the inclined surface is larger than a cross-sectional area of a bottom end of the inclined surface.

After the technical scheme is adopted, the utility model has the beneficial effects that:

according to the utility model, as the two edges forming the chamfer are positioned and the positions of the chamfer cutting tools are fixed, the formed chamfer size is determined, the expected chamfer size can be obtained no matter what equipment is used for chamfering, and the problem that the chamfer size precision cannot be controlled due to a plurality of uncontrollable factors when equipment such as a drilling machine is used for chamfering is avoided.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a front view of the present utility model;

FIG. 3 is a side view of the present utility model;

FIG. 4 is another side view of the present utility model;

FIG. 5 is a schematic view of the structure of the present utility model in use;

FIG. 6 is a schematic view of another embodiment of the present utility model in use.

In the figure, a cutter bar is shown as 1; 2-positioning columns; 3-limiting screws; 4-countersinking the blade; 5-chamfering the blade; 10-a first clamping groove; 11-a first connecting groove; 12-a second connecting groove; 13-inclined plane; a, projecting a machining edge of the chamfering blade; b, projecting a machining edge of the countersink blade; c-positioning column excircle projection; d-the projection distance from the projection intersection point of the chamfer blade processing edge and the excircle of the positioning column to the projection of the spot facing blade processing edge; e-the distance from the projection intersection point of the chamfer blade processing edge and the countersink blade processing edge to the projection of the outer circle of the positioning column.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

According to the illustrations of fig. 1 to 6, a tool structure for precise chamfering includes:

the bottom end of the cutter bar 1 is connected with the rocker arm drill;

the positioning column 2 is arranged at the top end of the cutter bar 1;

a countersink blade 4 provided at one end of the cutter bar 1;

and a chamfering blade 5 provided at the other end of the cutter bar 1.

The top of the cutter bar 1 is provided with a limiting hole, a limiting screw 3 is arranged in the limiting hole in a penetrating manner, and the limiting screw 3 is abutted with the end part of the positioning column 2 inserted into the cutter bar 1.

The top side wall of cutter arbor 1 is provided with the first draw-in groove 10 that is the arc, and the inside wall of first draw-in groove 10 is provided with first locating hole, is provided with first locating screw in the first locating hole, and countersink blade 4 passes through fixed connection between the inside wall of first screw and first draw-in groove 10.

The top side wall of cutter arbor 1 is provided with the second draw-in groove, and the inside wall of second draw-in groove is provided with the second locating hole, is provided with the second set screw in the second locating hole, fixed connection is passed through between the inside wall of second screw and second draw-in groove to chamfer blade 5.

The second draw-in groove is including being fan-shaped first spread groove 11 and the second spread groove 12 that set up, and the second spread groove 12 is connected to be set up in one side of first spread groove 11, chamfer blade 5 sets up in the inside wall department of first spread groove 11, and second spread groove 12 is located the below of chamfer blade 5.

The first and

second connection grooves

11 and 12 are each provided obliquely downward.

The first connecting groove 11 is provided with an inclined surface 13 provided on the inner side wall of the chamfering blade 5, and the cross-sectional area of the top end of the inclined surface 13 is larger than that of the bottom end of the inclined surface 13.

The basic components of the chamfer are: 2 sides form an included angle with one side of the 2 sides. Therefore, in machining, the utility model can process the required chamfer size by only positioning 2 edges with the inner wall of the first clamping groove 10 and the inner wall of the second clamping groove and determining the position of a chamfer processing tool.

The utility model is applicable to processing of various chamfers, and realizes the precision of the chamfer size meeting the design requirement.

The utility model can be used for various processing modes, such as countersinking, drilling, boring, turning, milling, planing and the like; the utility model has one or more groups of blades, the blades are indexable blades; at least one of the blades has a cutting function for cutting a chamfer.

In the embodiment, the cutter bar 1 is arranged on the rocker arm drilling equipment, so that spot facing and chamfering of holes can be realized simultaneously.

The main structure body is a cutter bar 1, the relative sizes among a first clamping groove 10, a second clamping groove and a positioning column 2 processed on the cutter bar are calculated according to chamfering requirements, the requirements of processing parts are that the aperture is 16mm, and the processing chamfer is 1 multiplied by 45 degrees for example, and the calculation method is as follows:

positioning column: diameter of the positioning column = aperture of the part machining, namely phi 16, and the positioning column is in clearance fit with a hole to be machined;

countersinking blade: the working edge of the blade is perpendicular to the axis of the positioning post, i.e. the angle = 90 °.

Chamfering blade: the included angle between the processing edge of the blade and the axis of the positioning column=hole processing chamfer, namely, the included angle=45°; the distance from the projection intersection point of the chamfer blade processing edge and the excircle of the positioning column to the projection of the spot facing blade processing edge=1mm; distance from projection intersection point of chamfer blade processing edge and countersink blade processing edge to positioning column excircle projection=1mm.

In the embodiment, the countersink blade and the chamfering blade are formed blades, so that the countersink blade and the chamfering blade are convenient to detach and replace, and the formed blades with the same specification are fixed in size, good in consistency and high in precision. Through drawing software such as CAD, the cutting edge is preset at a required position according to the calculated size, and then the position of the blade mounting hole on the blade body is directly measured according to the posture of the blade at the moment.

For example, CCMT060208 is selected for the chamfering blade, all dimensions of the specification are clear, the outline dimension is fixed, the shape is diamond, the diamond angle is 80 degrees, the back angle is 7 degrees, the edge length is 6mm, the thickness is 2.38mm, the nose fillet radius is 0.8, and the like.

The processing process of the utility model is as follows:

step 1, mounting a cutter bar 1 after assembly on a rocker arm drill, starting equipment, enabling the cutter bar 1 to rotate, and feeding;

step 2, along with the feeding of the cutter bar 1, the positioning column 2 is inserted into a hole to be machined, the countersink blade 4 and the chamfering blade 5 are also contacted with a workpiece, and countersink and chamfering machining are started;

and 3, after spot facing to the required depth, withdrawing the cutter bar 1 to finish machining.

Before machining, in the process of adjusting the cutter, a tool setting gauge is used for adjusting the chamfering blade 5, the countersinking blade 4 and the positioning column 2. When the relative positions of the blades are determined, the shapes formed during the machining process conform to the relative positions of the blades.

In the description of the present utility model, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. In the description of the present utility model, unless otherwise specified and defined, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, mechanical or electrical, or may be in communication with each other between two elements, directly or indirectly through intermediaries, as would be understood by those skilled in the art, in view of the specific meaning of the terms described above.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. A tool structure for precise chamfering machining, comprising:

the bottom end of the cutter bar is connected with the rocker arm drill;

the positioning column is arranged at the top end of the cutter bar;

the countersink blade is arranged at one end of the cutter bar;

and the chamfering blade is arranged at the other end of the cutter bar.

2. The cutter structure for precise chamfering machining according to claim 1, wherein a limiting hole is formed in the top end of the cutter bar, a limiting screw is arranged in the limiting hole in a penetrating mode, and the limiting screw is abutted with the end portion of the positioning column inserted into the cutter bar.

3. The cutter structure for precisely machining the chamfer according to claim 1, wherein the side wall of the top end of the cutter bar is provided with a first clamping groove in an arc shape, the inner side wall of the first clamping groove is provided with a first positioning hole, a first positioning screw is arranged in the first positioning hole, and the countersunk cutter blade is fixedly connected with the inner side wall of the first clamping groove through the first screw.

4. The cutter structure for precise chamfering machining according to claim 1, wherein a second clamping groove is formed in the side wall of the top end of the cutter bar, a second positioning hole is formed in the inner side wall of the second clamping groove, a second positioning screw is arranged in the second positioning hole, and the chamfering blade is fixedly connected with the inner side wall of the second clamping groove through the second screw.

5. The tool structure for precise chamfering machining according to claim 4, wherein the second clamping groove comprises a first connecting groove and a second connecting groove which are arranged in a fan shape, the second connecting groove is connected to one side of the first connecting groove, the chamfering blade is arranged at the inner side wall of the first connecting groove, and the second connecting groove is located below the chamfering blade.

6. The tool structure for precise chamfering as recited in claim 5, wherein said first and second connecting grooves are each provided obliquely downward.

7. The tool structure for precise chamfering as recited in claim 5, wherein said first connecting groove is provided with an inner sidewall of said chamfering blade provided with an inclined surface, a cross-sectional area of a top end of the inclined surface being larger than a cross-sectional area of a bottom end of the inclined surface.