CN213104706U

CN213104706U - Reverse-drawing milling cutter for processing countersunk hole

Info

Publication number: CN213104706U
Application number: CN202021715618.3U
Authority: CN
Inventors: 缪杰杰; 何杨; 张健; 刘建安
Original assignee: Wujiang Hengda Machine Fittings Co ltd
Current assignee: Wujiang Hengda Machine Fittings Co ltd
Priority date: 2020-08-17
Filing date: 2020-08-17
Publication date: 2021-05-04
Anticipated expiration: 2030-08-17

Abstract

The utility model discloses a reverse-drawing milling cutter for counter bore processing, including handle of a knife, cutter arbor, tool bit, the right-hand member of cutter arbor sets up on the handle of a knife left end face of handle of a knife, the tool bit sets up in the left end face of cutter arbor, the below front side of tool bit is equipped with the cutting edge. The utility model has the advantages that: the part only needs clamping once, can make the counter bore machine-shaping with a reverse-pull milling cutter, and the machining precision of counter bore is high, and the process velocity is fast, has improved the machining efficiency of part.

Description

Reverse-drawing milling cutter for processing countersunk hole

Technical Field

The utility model relates to a mould processing technology field specifically is a reverse-drawing milling cutter for counter bore processing.

Background

The countersunk hole is processed by processing a big hole end and a small hole end with a big hole facing upwards. Influenced by part structure, can't process the counter sink main aspects up and need the clamping again, two sword processing could the shaping, can't one-time processing shaping, the process time of counter sink is long, inefficiency. Meanwhile, the machining precision of two cutters is difficult to ensure due to twice clamping.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a reverse-drawing milling cutter for counter bore processing to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a reverse-pull milling cutter for counter bore processing, includes handle of a knife, cutter arbor, tool bit, the right-hand member of cutter arbor sets up on the handle of a knife left end face of handle of a knife, the tool bit sets up in the left end face of cutter arbor, the below front side of tool bit is equipped with the cutting edge.

Further preferably, the tool holder is of a cylindrical structure, and a chamfer is arranged at the right end of the tool holder.

Preferably, the left end face of the knife handle is a round surface, the connecting surface of the knife handle and the knife handle is a conical surface, and the part close to the left end face of the knife handle is an arc connecting surface.

Further preferably, the upper end of the cutting edge extends to the left end of the cutter bar, and the position of the cutting edge at the lower end of the cutting edge is lower than that of the cutter head.

Preferably, the cutter bar is of an elliptic cylinder structure, the sectional area of the cutter bar is smaller than the area of the left end face of the cutter handle, and the lower half face offset from the left end face of the cutter handle is of an eccentric structure.

Further preferably, the width of the cutter head is equal to the dimension of the long axis of the section of the cutter rod, and the length of the cutter head is larger than the dimension of the short axis of the section of the cutter rod.

Preferably, the upper end of the cutter head is flush with the upper end of the cutter bar, and the lower end of the cutter head is of an arc-shaped structure.

Further preferably, the cutting edge is of a fan-shaped structure, and the cutting edge, the cutter head and the cutter bar are of L-shaped structures.

Advantageous effects

The utility model discloses a turn over and draw milling cutter for counter bore processing, the part only needs a clamping, with one turn over draw milling cutter can make counter bore machine-shaping, the machining precision of counter bore is high, and process velocity is fast, has improved the machining efficiency of part.

Drawings

Fig. 1 is a front view of a reverse-drawn milling cutter for countersinking according to an embodiment of the present invention;

fig. 2 is a left side view of a reverse-drawn milling cutter for countersunk hole machining according to an embodiment of the present invention.

Reference numerals

1-knife handle, 2-knife handle left end face, 3-knife rod, 4-knife head, 5-knife edge, 6-chamfer.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1-2, the counter-pull milling cutter for machining the countersunk hole comprises a cutter handle 1, a cutter bar 3 and a cutter head 4, wherein the right end of the cutter bar 3 is arranged on the left end surface 2 of the cutter handle 1, the cutter head 4 is arranged on the left end surface of the cutter bar 3, and a cutting edge 5 is arranged on the front side below the cutter head 4.

Preferably, the tool shank 1 is of a cylindrical structure, and a chamfer 6 is arranged at the right end of the tool shank, so that the tool shank is convenient to machine.

Preferably, the left end face 2 of the cutter handle is a round surface, the connecting surface of the cutter handle and the cutter handle 1 is a conical surface, and the part close to the left end face 2 of the cutter handle is an arc connecting surface, so that the phenomenon that the cutter handle is broken due to stress concentration is avoided, and the fatigue resistance of the reverse-pull milling cutter is improved.

Preferably, the upper end of the cutting edge 5 extends to the left end of the cutter bar 3, and the position of the lower end tip of the cutting edge 5 is lower than the position of the lower end point of the cutter head 4, so as to ensure the cutting surface of the cutting edge 5.

Preferably, the cutter arbor 3 is oval cylinder structure, makes its area of connection with handle of a knife left end face 2 increase, improves joint strength, improves the intensity of cutter arbor 3 simultaneously, the sectional area of cutter arbor 3 is less than the area of handle of a knife left end face 2, and the bias is in the half lower face of handle of a knife left end face 2 and is eccentric structure, can realize the processing of the inside jumbo size counter bore of part through the cutter arbor 3 of eccentric structure.

Preferably, the width of the cutting head 4 is equal to the dimension of the long axis of the section of the cutter bar 3, a mounting position of the cutting edge 5 is reserved, and the length of the cutting head 4 is greater than the dimension of the short axis of the section of the cutter bar 3, so that the cutting edge 5 has the machining allowance of eccentric machining.

Preferably, the upper end of tool bit 4 flushes with the upper end of cutter arbor 3, the lower extreme of tool bit 4 is the circular arc type structure, prevents that 4 closed angle sharp edges of tool bit from fish tail to the user.

Preferably, the cutting edge 5 is of a fan-shaped structure, and the cutting edge 5, the cutter head 4 and the cutter bar 3 are of an L-shaped structure.

In this embodiment, through the reverse drawing cutter processing part, its inside aperture size is 16mm, the bore depth is 6mm, and outside axiality connects the counter bore that the bore diameter is 9mm, the bore depth is 18mm, and its course of working is:

s1), firstly, preparing a reverse-pull cutter, wherein the diameter of a cutter handle 1 is 16mm, the length of the cutter handle is 43mm, the length of the cutter bar 3 is 28mm, the long axis of the cross section of the cutter bar is 3.5mm, the short axis of the cross section of the cutter bar is 2.5mm, the width of the cutter head 4 is 3.5mm, the length of the cutter head is 7mm, the thickness of the cutter head is 5mm, the width of the cutter head 4 is 7.5mm, the vertical dimension from the lower end cutting edge of the cutting edge 5 to the central axis of the cutter handle 1 is 7.5mm, the dimension from the cutting edge of the cutting edge 5 to the nearest point of the cutter bar 3 is 3.5mm, namely the eccentric;

2) secondly, processing a round hole with the hole depth of 29mm and the hole diameter of 9mm on the part by using a drill bit with the diameter of 9mm, and fixing the part on a machine, wherein the round hole is aligned to a counter-pull cutter;

3) then, a reverse-pulling cutter is stretched into the circular hole, the stretching length of the reverse-pulling cutter is 29mm, the reverse-pulling cutter rotates and moves along the vertical direction of the cutter bar 3 at the same time until the cutter bar 3 touches the inner wall of the circular hole of 9mm in the step 2), and the reverse-pulling cutter can eccentrically process the blade tip of the cutting edge 5 to the cutter bar 3 to remove the allowance of a single edge of 3.5mm in the circular hole of 9mm, and cut a circle with the diameter of 16 mm;

4) and finally, reversely pulling out the reverse-pulling cutter to the orifice along the 9mm round hole in the step 2), pulling out the displacement of 6mm, and finishing the processing of the countersunk hole with the aperture of 16mm and the hole depth of 6 mm.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the content of the present invention within the protection scope of the present invention.

Claims

1. The utility model provides a reverse-drawn milling cutter for counter bore processing which characterized in that: the novel knife handle comprises a knife handle (1), a knife rod (3) and a knife head (4), wherein the right end of the knife rod (3) is arranged on the left end face (2) of the knife handle (1), the knife head (4) is arranged on the left end face of the knife rod (3), and a cutting edge (5) is arranged on the front side below the knife head (4).

2. A backdraw milling cutter for countersinking according to claim 1, wherein: the knife handle (1) is of a cylindrical structure, and a chamfer (6) is arranged at the right end of the knife handle.

3. A backdraw milling cutter for countersinking according to claim 1, wherein: the knife handle is characterized in that the left end face (2) of the knife handle is a circular face, the connecting face of the knife handle and the knife handle (1) is a conical face, and the part close to the left end face (2) of the knife handle is an arc connecting face.

4. A backdraw milling cutter for countersinking according to claim 1, wherein: the upper end of the cutting edge (5) extends to the left end of the cutter rod (3), and the position of the lower end cutting edge of the cutting edge (5) is lower than the position of the lower end point of the cutter head (4).

5. A backdraw milling cutter for countersinking according to claim 1, wherein: the cutter arbor (3) are oval cylinder structure, the sectional area of cutter arbor (3) is less than the area of handle of a knife left end face (2), and the bias is in the half lower face of handle of a knife left end face (2) and is eccentric structure.

6. A backdraw milling cutter for countersinking according to claim 1, wherein: the width of the cutter head (4) is equal to the size of the long axis of the section of the cutter rod (3), and the length of the cutter head (4) is larger than the size of the short axis of the section of the cutter rod (3).

7. A backdraw milling cutter for countersinking according to claim 1, wherein: the upper end of the cutter head (4) is flush with the upper end of the cutter bar (3), and the lower end of the cutter head (4) is of an arc-shaped structure.

8. A backdraw milling cutter for countersinking according to claim 1, wherein: the cutting edge (5) is of a fan-shaped structure, and the cutting edge (5), the cutter head (4) and the cutter bar (3) are of an L-shaped structure.