CN113510313A

CN113510313A - Indexable deburring cutter for inner wall cross orifices

Info

Publication number: CN113510313A
Application number: CN202110791052.5A
Authority: CN
Inventors: 李贺; 杨少勇; 陈正宏
Original assignee: Guizhou Space Appliance Co Ltd
Current assignee: Guizhou Space Appliance Co Ltd
Priority date: 2021-07-13
Filing date: 2021-07-13
Publication date: 2021-10-19

Abstract

An indexable deburring tool for internal wall cross-porting comprising: the cutter bar, the ejector rod and the blade; a notch is formed in the left end of the cutter bar, and the blade is rotatably mounted on the notch through a rotating shaft; the ejector rod is arranged in an inner hole of the cutter bar and can move leftwards to push the blade to rotate and rightwards to reset the blade. By adopting the invention, the mode of extending from the cavity opening to remove burrs is changed into the mode of extending from the hole opening of the outer wall, and the deburring mode is changed into the mode of rotating the knife handle, so that the required cavity space is greatly reduced, and the constraint of the cavity size and the cavity structure is avoided. And the deburring cutter falls the blade in the inner wall drill way, and like the chamfer of the front of the drill bit, the burr is cleaner compared with the traditional method.

Description

Indexable deburring cutter for inner wall cross orifices

Technical Field

The invention relates to the technical field of machining tools, in particular to an indexable deburring tool for inner wall crossed orifices.

Background

In the processing of aerospace parts, a structure of a small hole on a wall surface often appears. When such holes are machined, certain scraps are remained on the inner wall and are adhered to the hole openings of the inner wall. For aerospace products, if such chips remain, the chips are very easy to drop off when matched finished products are used, and the service performance of the products is affected.

The inner wall hole burr of this type of clearance, the tradition mode is to use little triangular file head to scrape the inner wall orifice department, removes the burr from the orifice department. However, the method is only suitable for the condition that the circular inner cavity or the rectangular inner cavity corresponding to the inner wall orifice is large, if the inner cavity of the part is too small or the through cavity is not convenient to extend, the small triangular file cannot be adjusted to a favorable angle to scrape the orifice, one side close to the orifice is usually cleaned cleanly, and the hard edge on the other side cannot be processed.

Disclosure of Invention

The main purpose of the present invention is to propose an indexable deburring tool for inner wall crossed apertures, aiming at solving the above technical problems.

To achieve the above object, the present invention proposes an indexable deburring tool for inner wall cross apertures, comprising: the cutter bar, the ejector rod and the blade; a notch is formed in the left end of the cutter bar, and the blade is rotatably mounted on the notch through a rotating shaft; the ejector rod is arranged in an inner hole of the cutter bar and can move leftwards to push the blade to rotate and rightwards to reset the blade.

Preferably, the blade is in a right-angle isosceles triangle structure, the cutting edge is arranged on the right-angle edge, and a rotating shaft hole is formed in the position, close to the right angle, of the symmetrical axis of the blade; the left end surface of the ejector rod is a 45-degree wedge-shaped surface; when the ejector rod abuts against the blade, the wedge-shaped surface abuts against the right-angle edge of the blade.

Preferably, the ejector pin comprises an ejector pin part and a guide part arranged on the right side of the ejector pin part; the inner hole of the cutter bar comprises a thimble hole and a guide hole arranged on the right side of the thimble hole; the thimble part is positioned in the thimble hole and is in clearance fit with the thimble hole; the guide part is positioned in the guide hole and is in sliding fit with the guide hole.

Preferably, the ejector rod further comprises a threaded part arranged on the right side of the guide part; the inner hole of the cutter bar also comprises a threaded hole arranged on the right side of the guide hole; the threaded part is matched with the threaded hole; and a handle part for rotating the push rod is arranged on the right side of the thread part.

Preferably, the thimble portion, the guide portion, the threaded portion and the handle portion of the mandril are of an integrally molded structure.

Preferably, an anti-slip structure is provided on an outer surface of the handle portion.

Preferably, the anti-slip structure is a groove.

Optionally, the anti-slip structure is a knurl structure.

Preferably, the cutter bar comprises an insertion part and a holding part arranged on the right side of the insertion part, and the diameter of the insertion part is matched with that of a through hole in the wall surface of the workpiece; the diameter of the gripping portion is larger than the diameter of the insertion portion.

Preferably, the insertion part and the holding part on the cutter bar are of an integrally formed structure.

The invention has the following beneficial effects: when the indexable deburring cutter for the inner wall cross orifice is used for deburring, the position of the ejector rod is adjusted rightwards at first, so that the blade is retracted into the cutter bar, then the cutter is inserted into the through hole in the wall surface of the workpiece, and the position of the ejector rod is adjusted leftwards to push the blade to rotate so as to adjust the angle of the blade, so that deburring can be carried out. By adopting the invention, the mode of extending from the cavity opening to remove burrs is changed into the mode of extending from the hole opening of the outer wall, and the deburring mode is changed into the mode of rotating the knife handle, so that the required cavity space is greatly reduced, and the constraint of the cavity size and the cavity structure is avoided. And the deburring cutter falls the blade in the inner wall drill way, and like the chamfer of the front of the drill bit, the burr is cleaner compared with the traditional method.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of an indexable deburring tool for inner wall cross-porting according to the present invention;

FIG. 2 is a schematic structural view of the indexable deburring tool of the present invention in a feed state;

FIG. 3 is a cross-sectional view taken along A-A of FIG. 2;

FIG. 4 is a schematic structural view of the indexable deburring tool of the present invention after the ejector rod pushes the blade to rotate in a machining state;

FIG. 5 is an enlarged view of the structure at C in FIG. 4;

FIG. 6 is a schematic view of the structure of the tool bar of the present invention;

FIG. 7 is a cross-sectional view taken along line B-B of FIG. 6;

FIG. 8 is a schematic structural view of the lift pin of the present invention;

FIG. 9 is a schematic view of the construction of a blade according to the present invention;

description of reference numerals: 10-a cutter bar; 101-slotting; 102-thimble holes; 103-a pilot hole; 104-a threaded hole; 105-an insertion portion; 106-a grip portion; 20-a top rod; 201-a thimble portion; 202-a guide; 203-a threaded portion; 204-a handle portion; 205-grooves; 206-wedge-facet; 30-a blade; 301-rotating shaft hole; 40-a rotating shaft; 50-workpiece.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

An indexable deburring tool for inner wall cross orifices comprises a tool bar 10, a mandril 20 and a blade 30; a slot 101 is arranged at the left end of the cutter bar 10, and the blade 30 is rotatably mounted on the slot 101 through a rotating shaft 40; the push rod 20 is arranged in the inner hole of the cutter bar 10, and the push rod 20 can move leftwards to push the blade 30 to rotate and move rightwards to reset the blade 30.

In this embodiment, the blade 30 is a right-angled isosceles triangle structure, the cutting edge is disposed on the right-angled edge, and the rotation shaft hole 301 is disposed at a position where the symmetry axis of the blade 30 is close to the right angle; the left end surface of the ejector rod 20 is a wedge-shaped surface 206 with an angle of 45 degrees; when the ejector pin 20 abuts against the blade 30, the wedge surface 206 abuts against the right-angled edge of the blade 30. When the through hole on the wall surface of the workpiece 50 is deburred, the wedge-shaped surface 206 is abutted against the right-angle edge of the blade 30, and at the moment, the rotation limiting effect is exerted on the blade 30 so as to control the cutting edges on the two right-angle edges of the blade 30 to deburre the hole opening of the through hole on the wall surface of the workpiece 50. When the push rod 20 moves rightwards to release the blade 30, the blade 30 is reset under the action of gravity, namely, the inclined edge of the blade 30 is parallel to the horizontal direction, so that the blade 30 is conveniently drawn out of the through hole which is avoided by the workpiece.

In the present embodiment, the thimble 20 includes a thimble portion 201, and a guide portion 202 provided on the right side of the thimble portion 201; the inner hole of the cutter bar 10 comprises a thimble hole 102 and a guide hole 103 arranged on the right side of the thimble hole 102; the thimble part 201 is positioned in the thimble hole 102, and the thimble part 201 is in clearance fit with the thimble hole 102; the guide portion 202 is located in the guide hole 103, and the guide portion 202 is slidably fitted to the guide hole 103. Through the arrangement of the structure that the guide part 202 is matched with the guide hole 103, the guide effect can be achieved when the ejector rod 20 moves left and right, and meanwhile, the coincidence of the axis of the ejector rod 20 and the axis of the cutter bar 10 can be ensured. The thimble hole 102 and the thimble portion 201 are in clearance fit, so that the requirement for coaxiality of the thimble hole 102 relative to the guide hole 103 can be reduced, or the requirement for coaxiality of the thimble portion 201 relative to the guide portion 202 can be reduced, and further the processing and manufacturing difficulty can be reduced.

In this embodiment, the ram 20 further includes a threaded portion 203 disposed on the right side of the guide portion 202; the inner hole of the cutter bar 10 also comprises a threaded hole 104 arranged on the right side of the guide hole 103; the threaded part 203 is matched with the threaded hole 104; a handle portion 204 for rotating the jack 20 is provided on the right side of the screw portion 203. The whole ejector rod 20 can be driven to rotate by rotating the handle part 204, the ejector rod 20 is driven to move left and right under the matching action of the threaded part 203 and the threaded hole 104, and then the blade 30 is pushed to rotate or the blade 30 is reset.

In this embodiment, the thimble portion 201, the guide portion 202, the threaded portion 203, and the handle portion 204 of the thimble 20 are integrally formed.

In this embodiment, a slip-resistant structure, which is a groove 205 or a knurl structure, is disposed on the outer surface of the handle portion 204.

In the present embodiment, the tool bar 10 includes an insertion portion 105, and a holding portion 106 disposed at the right side of the insertion portion 105, and the diameter of the insertion portion 105 is adapted to the diameter of the through hole on the wall surface of the workpiece 50; the diameter of the grip portion 106 is larger than the diameter of the insertion portion 105. The insertion portion 105 and the holding portion 106 of the knife bar 10 are integrally formed.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An indexable deburring tool for inner wall cross-porting characterized by: comprises a cutter bar (10), a mandril (20) and a blade (30);

a groove (101) is formed in the left end of the cutter bar (10), and the blade (30) is rotatably mounted on the groove (101) through a rotating shaft (40);

the ejector rod (20) is arranged in an inner hole of the cutter bar (10), and the ejector rod (20) can move leftwards to push the blade (30) to rotate and move rightwards to reset the blade (30).

2. An indexable deburring tool for internal wall cross-porting of claim 1 wherein: the blade (30) is of a right-angle isosceles triangle structure, the cutting edge is arranged on the right-angle edge, and a rotating shaft hole (301) is arranged at the position, close to the right angle, of the symmetrical axis of the blade (30); the left end surface of the ejector rod (20) is a wedge-shaped surface (206) with an angle of 45 degrees; when the ejector rod (20) abuts against the blade (30), the wedge-shaped surface (206) abuts against the right-angle edge of the blade (30).

3. An indexable deburring tool for internal wall cross-porting of claim 1 wherein: the ejector pin (20) comprises an ejector pin part (201) and a guide part (202) arranged on the right side of the ejector pin part (201);

the inner hole of the cutter bar (10) comprises a thimble hole (102) and a guide hole (103) arranged on the right side of the thimble hole (102);

the thimble part (201) is positioned in the thimble hole (102), and the thimble part (201) is in clearance fit with the thimble hole (102); the guide part (202) is positioned in the guide hole (103), and the guide part (202) is in sliding fit with the guide hole (103).

4. An indexable deburring tool for internal wall cross-porting of claim 3 wherein: the ejector rod (20) further comprises a threaded part (203) arranged on the right side of the guide part (202);

the inner hole of the cutter bar (10) also comprises a threaded hole (104) arranged on the right side of the guide hole (103);

the threaded part (203) is matched with the threaded hole (104);

a handle part (204) for rotating the push rod (20) is arranged at the right side of the thread part (203).

5. An indexable deburring tool for internal wall cross-porting of claim 4 wherein: the thimble part (201), the guide part (202), the thread part (203) and the handle part (204) on the thimble (20) are of an integrated structure.

6. An indexable deburring tool for internal wall cross-porting of claim 4 wherein: an anti-slip structure is disposed on an outer surface of the handle portion (204).

7. An indexable deburring tool for internal wall cross-porting of claim 6 wherein: the anti-slip structure is a groove (205).

8. An indexable deburring tool for internal wall cross-porting of claim 6 wherein: the anti-slip structure is a knurl structure.

9. An indexable deburring tool for internal wall cross-porting of claim 1 wherein: the cutter bar (10) comprises an insertion part (105) and a holding part (106) arranged on the right side of the insertion part (105), and the diameter of the insertion part (105) is matched with that of a through hole in the wall surface of the workpiece (50); the diameter of the gripping portion (106) is larger than the diameter of the insertion portion (105).

10. An indexable deburring tool for internal wall cross-porting of claim 9 wherein: the inserting part (105) and the holding part (106) on the cutter bar (10) are of an integrated structure.