CN206794848U - A kind of rounding instrument - Google Patents

Abstract

The utility model discloses a kind of rounding instrument, and for carrying out rounding processing, including counterbit body to the convex shoulder of thin-walled convex shoulder bushing, it is circular groove that the bottom increment face of the counterbit body, which is coaxially disposed one with cutting edge and cross section,.The utility model discloses a kind of rounding instrument, effectively solve the problems, such as the convex shoulder outer rim rounding of thin-walled convex shoulder bushing, effective rounding processing carried out to convex shoulder and avoids injuring part.

Description

A kind of rounding instrument

Technical field

Digit Control Machine Tool accessory field is the utility model is related to, is a kind of rounding instrument specifically.

Background technology

End face counterbit, only it is provided for processing the cutting tooth of the end face in hole on end face.

Generally, need to be to thin-walled convex shoulder bushing after assembling to ensure that thin-walled convex shoulder bushing assembles the thickness of back part The file that convex shoulder end face carries out rounding is repaiied, and generally carrying out file to convex shoulder end face with common rose reamer at present repaiies.But after file is repaiied Thin-walled convex shoulder bushing convex shoulder wall thickness be less than 2mm in the case of, the convex shoulder outer rim with common rose reamer to thin-walled convex shoulder bushing During rounding, the point of a knife of common rose reamer easily interferes with Assembly part and injures part, or cutting edge can not connect again Contact rounding position.

Utility model content

The purpose of this utility model is to provide a kind of rounding instrument effectively solve the convex shoulder outer rim of thin-walled convex shoulder bushing The problem of rounding, effective rounding processing is carried out to convex shoulder and avoids injuring part.

The utility model is achieved through the following technical solutions：A kind of rounding instrument, for the convex of thin-walled convex shoulder bushing Shoulder carries out rounding processing, including counterbit body, and the bottom increment face of the counterbit body is coaxially disposed band cutting edge and a cross section For the groove of circle.

The generally use of counterbit body described in the utility model end face counterbit, in end face, the bottom increment face of counterbit opens up band sword The groove of mouth.The convex shoulder of the groove and thin-walled convex shoulder bushing is correspondingly arranged, and rounding processing, side are carried out to convex shoulder by cutting edge Just, fast.The utility model further groove is arranged on the center in its bottom increment face of counterbit, i.e. the bottom increment face of groove and counterbit is coaxial Set, be easy to counterbit rotary motion to complete the processing of the rounding of convex shoulder.

Further, in order to preferably realize the utility model, the groove is included positioned at bottom portion of groove and for limiting Convex shoulder enters the round bottom of depth of groove, positioned at slot opening and for facilitating the side wall of convex shoulder disengaging groove and positioned at round bottom With side wall junction and for the cutting edge assembly of rounding.

Further, in order to preferably realize the utility model, the cutting edge assembly include it is at least one respectively with circle The tangent cutting edge of bottom, side wall.

Further, in order to preferably realize the utility model, in the cutting edge assembly, multiple cutting edges are discontinuously, connect Pass through.

Further, in order to preferably realize the utility model, the cutting edge is 1/4 circular arc, and the radius of circular arc is with falling Fillet is equal sized and the distance of the center of circle of circular arc and round bottom is equal to rounding size.

Further, in order to preferably realize the utility model, the round bottom is circular flat, a diameter of convex shoulder of round bottom Diameter and twice of rounding size difference；The distance of the round bottom and slot opening be round bottom depth, the depth of round bottom The wall thickness dimension of convex shoulder after being repaiied not less than rounding size and no more than file.

The utility model compared with prior art, has advantages below and beneficial effect：

（1）The utility model effectively solves the problems, such as the convex shoulder outer rim rounding of thin-walled convex shoulder bushing, has to convex shoulder Effect rounding is processed and avoids injuring part；

（2）The utility model is simple in construction, can be prepared by based on existing brill.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the installation diagram of thin-walled convex shoulder bushing and part.

Fig. 3 is the dimension mark schematic diagram of round bottom in the utility model.

Fig. 4 is the structural representation of the utility model further groove.

Fig. 5 is the close-up schematic view at I in Fig. 4.

Schematic diagram when Fig. 6 installs for the utility model is corresponding with thin-walled convex shoulder bushing.

Fig. 7 is the close-up schematic view at M in Fig. 6.

In figure：1. round bottom, 2. cutting edges, 3. side walls, 4. bottom increment faces, 5. convex shoulder end faces, 6. rounding positions, 7. Convex shoulder, 8. thin-walled convex shoulder bushings, 9. parts.

Embodiment

The utility model is described in further detail with reference to embodiment, but embodiment of the present utility model is not It is limited to this.

Embodiment 1：

A kind of rounding instrument, as shown in figure 1, for carrying out rounding processing, bag to the convex shoulder 7 of thin-walled convex shoulder bushing 8 Counterbit body is included, it is circular groove that the bottom increment face 4 of the counterbit body, which is coaxially disposed one with cutting edge and cross section,.

The generally use of counterbit body described in the utility model end face counterbit, in end face, the bottom increment face 4 of counterbit opens up band The groove of cutting edge.The convex shoulder 7 of the groove and thin-walled convex shoulder bushing 8 is correspondingly arranged, and carrying out rounding to convex shoulder 7 by cutting edge adds Work, it is convenient, fast.The utility model further groove is arranged on the bottom increment at the center in its bottom increment face 4 of counterbit, i.e. groove and counterbit Face 4 is coaxially disposed, and is easy to counterbit rotary motion to complete the processing of the rounding of convex shoulder 7.

As shown in Fig. 2 the installation diagram of thin-walled convex shoulder bushing 8 and part 9, wherein identifying rounding position 6 and convex shoulder end Face 5.As shown in Figure 6, Figure 7, when carrying out rounding processing to convex shoulder 7 using rounding instrument described in the utility model, round bottom 1 It is bonded with convex shoulder end face 5 and when rounding position 6 is bonded with cutting edge 2, completes rounding processing.

Embodiment 2：

A kind of rounding instrument, for carrying out rounding processing, including counterbit body to the convex shoulder 7 of thin-walled convex shoulder bushing 8, It is circular groove that the bottom increment face 4 of the counterbit body, which is coaxially disposed one with cutting edge and cross section,.

Further, in order to preferably realize the utility model, the groove is included positioned at bottom portion of groove and for limiting Convex shoulder 7 enters the round bottom 1 of depth of groove, positioned at slot opening and for facilitating convex shoulder 7 to pass in and out the side wall of groove and positioned at circle Bottom 1 is with side wall junction and for the cutting edge assembly of rounding.

Further, in order to preferably realize the utility model, the cutting edge assembly include it is at least one respectively with circle The tangent cutting edge 2 of bottom 1, side wall.

Further, in order to preferably realize the utility model, in the cutting edge assembly, multiple cutting edges 2 are discontinuously, no It is coherent.

Further, in order to preferably realize the utility model, the cutting edge 2 is 1/4 circular arc, and the radius of circular arc is with falling Fillet is equal sized and the center of circle of circular arc and the distance of round bottom 1 are equal to rounding size.

Further, in order to preferably realize the utility model, the round bottom 1 is circular flat, round bottom 1 it is a diameter of convex The difference of the diameter of shoulder 7 and twice of rounding size；The distance of the round bottom 1 and slot opening is the depth of round bottom 1, round bottom 1 Depth not less than rounding size and no more than file repair after convex shoulder 7 wall thickness dimension.

The other parts of the present embodiment are same as the previously described embodiments, therefore repeat no more.

Embodiment 3：

The present embodiment further optimizes on the basis of above-described embodiment, and the thin-walled convex shoulder bushing 8 is before file is repaiied, convex shoulder 7 a diameter of D is convex, and the wall thickness of convex shoulder 7 is δ, need to be to the outer rim rounding R of convex shoulder 7.Its round bottom 1 of rounding cutter it is straight Footpath is D, and the depth of round bottom 1 is L.The circle of the cutting edge 2 is O points, and the radius of cutting edge 2 is R_Sword, the starting point of cutting edge 2 is A points, the terminal of cutting edge 2 is B points.Multiple cutting edges 2 are discontinuously distributed.

The rounding instrument designs as follows：

Step 1：Select counterbit.

As shown in Figure 2 and Figure 3, common counterbore is generally selected, blade external diameter is D_Knife, and meet：D_Knife=D_{It is convex}+4R。

Step 2：Rounding bottom 1.

As shown in figure 3, centered on counterbit axis, at the center rounding bottom 1 in bottom increment face 4, meet：D= D_{It is convex}-2R And R≤L ＜ δ.

Step 3：Cutting edge 2 processed.

As shown in Figure 4, Figure 5, with the center of circle in O points, starting point is in A points, and for terminal in B points, radius is R processing in 1/4 circular arc Cutting edge.

Step 4：Side wall processed.

As shown in Figure 4, Figure 5, side wall and the terminal of cutting edge 2 are tangent, and B is point of contact；In cross section, side wall 3 and round bottom 1 press from both sides Angle is obtuse angle, and C points are the terminal of the opening of side wall 3, and BC sections are side wall profile line in figure.

The other parts of the present embodiment are same as the previously described embodiments, therefore repeat no more.

It is described above, only it is preferred embodiment of the present utility model, any formal limit is not done to the utility model System, every any simple modification made according to the technical essence of the utility model to above example, equivalent variations, each falls within Within the scope of protection of the utility model.

Claims (6)

1. A kind of 1. rounding instrument, for thin-walled convex shoulder bushing（8）Convex shoulder（7）Carry out rounding processing, including counterbit sheet Body, it is characterised in that：The bottom increment face of the counterbit body（4）It is circular groove that one, which is coaxially disposed, with cutting edge and cross section.
2. A kind of 2. rounding instrument according to claim 1, it is characterised in that：The groove is included positioned at bottom portion of groove simultaneously For limiting convex shoulder（7）Into the round bottom of depth of groove（1）, positioned at slot opening and for facilitating convex shoulder（7）Pass in and out groove Side wall（3）And positioned at round bottom（1）With side wall（3）Junction and the cutting edge assembly for being used for rounding.
3. A kind of 3. rounding instrument according to claim 2, it is characterised in that：The cutting edge assembly includes at least one Respectively with round bottom（1）, side wall（3）Tangent cutting edge（2）.
4. A kind of 4. rounding instrument according to claim 3, it is characterised in that：Multiple cutting edges in the cutting edge assembly （2）Discontinuously, it is discontinuous.
5. A kind of 5. rounding instrument according to claim 4, it is characterised in that：The cutting edge（2）For 1/4 circular arc, circle The radius of arc is equal sized with rounding and the center of circle of circular arc and round bottom（1）Distance be equal to rounding size.
6. A kind of 6. rounding instrument according to claim any one of 2-5, it is characterised in that：The round bottom（1）For circle Plane, round bottom（1）A diameter of convex shoulder（7）Diameter and twice of rounding size difference；The round bottom（1）With slot opening Distance be round bottom（1）Depth, round bottom（1）Depth after being repaiied not less than rounding size and no more than file convex shoulder（7）'s Wall thickness dimension.