CN210817502U - Flat-bottom counter bore boring cutter - Google Patents
Flat-bottom counter bore boring cutter Download PDFInfo
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- CN210817502U CN210817502U CN201921704339.4U CN201921704339U CN210817502U CN 210817502 U CN210817502 U CN 210817502U CN 201921704339 U CN201921704339 U CN 201921704339U CN 210817502 U CN210817502 U CN 210817502U
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- blade
- round table
- table part
- cutter
- blade mounting
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Abstract
The utility model belongs to the technical field of the boring cutter technique and specifically relates to a flat counter bore boring cutter, including integrated into one piece and coaxial handle of a knife (1), cutter arbor (2), bearing installation pole (4) and blade (6), its characterized in that: the front end of the cutter bar (2) is provided with a round table part (3) with a large front end and a small rear end, the round table part (3) is provided with two centrosymmetric blade mounting openings (8), each blade mounting opening (8) is arranged from the large end of the round table part (3) to the small end, the side wall of one side of each blade mounting opening (8) is a rhombic blade positioning surface, the blade positioning surfaces are parallel to the axis of the round table part (3), the side wall (9) of the other side of each blade mounting opening (8) extends outwards to the outer wall of the round table part (3) along the inner side edge of each blade positioning surface, the rhombic blades (6) are matched with the blade positioning surfaces in shape and locked on the positioning surfaces through locking screws (7), and a certain distance is kept between the inner side edges of the blades (6) of the two blade mounting openings (8).
Description
Technical Field
The utility model belongs to the technical field of the boring cutter technique and specifically relates to a flat-bottom counter bore boring cutter.
Background
The boring cutter is one kind of boring cutter, and is used in inner hole machining, reaming, copying and other machining places. Boring cutters typically have one or two cutting portions, which are dedicated to the rough, semi-finish or finish machining of an existing hole and may be used on a boring machine, a lathe or a milling machine.
The existing flat-bottom counter bore boring tool is shown in fig. 3 and comprises a tool shank 1, a tool bar 2 and a blade 6, wherein the tool shank is generally conical (a small number of vertical lathes are provided with square tool shanks), the tool bar is generally cylindrical, the head of the tool bar 2 is provided with a tool groove penetrating along the diameter direction, and the blade 6 is installed behind the tool groove and locked by a locking screw. The two ends of the blade extend out of the cutter bar from the cutter groove, and the size of the boring hole is related to the extending length of the blade. Generally, in order to maintain the concentricity of the counterbore and the existing hole, the head of the cutter bar is provided with a bearing mounting rod 4 which is used for mounting a bearing, and the size of the bearing is matched with that of the existing hole. When boring, the bearing enters the existing hole, the cutter bar drives the blade to rotate, and a counter bore is bored on the basis of the existing hole.
The existing boring cutter has the defects that: because the existing boring cutter needs to be provided with a cutter groove with a certain width along the radial direction, the joint of a bearing mounting rod for mounting a bearing and a cutter rod is weak, and the bearing mounting rod is easily disconnected from the root due to stress in the boring process; in addition, the position of the blade needs to be repeatedly adjusted when the blade is installed every time, the extending length of the blade can meet the requirement, and the installation process consumes time and labor.
Disclosure of Invention
The utility model aims at overcoming the not enough among the above-mentioned background art, provide a flat counter bore boring cutter, have simple structure and firm, simple to operate's technical characterstic.
The technical purpose of the utility model is realized like this: the utility model provides a flat-bottom counter bore boring cutter, including integrated into one piece and coaxial handle of a knife, the cutter arbor, bearing installation pole and blade, the big back little round platform portion in front of the front end system of cutter arbor, two centrosymmetric blade installing ports have been seted up to the round platform portion, the tip is seted up from the main aspects of round platform portion to every blade installing port, the lateral wall of blade installing port one of them side is the blade locating surface of rhombus, the blade locating surface is parallel with the axis of round platform portion, the lateral wall of blade installing port opposite side is along the inboard edge of blade locating surface outwards stretching the outer wall of round platform portion, the blade and the locating surface shape phase-match of rhombus, and lock on the blade locating surface through locking screw, keep the certain distance between the inboard edge of blade of two blade installing ports.
Preferably, the bearing mounting rod is positioned on the front end surface of the cutter rod, and the front end of the bearing mounting rod is provided with a screw hole of the bearing locking screw.
The utility model has the advantages that: the utility model is provided with a blade mounting opening, adopts a rhombic blade, can automatically position on the blade positioning surface of the blade mounting opening when the blade is mounted, and is locked by a screw, and does not need frequent adjustment; in addition, the two blade mounting openings extend inwards from the outer wall of the circular truncated cone, the connecting strength of the bearing mounting rod and the circular truncated cone is high, the bearing mounting rod cannot be easily broken, and the service life is long.
Drawings
Fig. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a schematic sectional view of a-a in fig. 1.
Fig. 3 is a front view structural schematic diagram of a conventional flat-bottom counter bore boring tool.
Detailed Description
The present invention will be further explained with reference to the drawings.
As shown in fig. 1 and 2, the utility model provides a flat-bottom counter bore boring cutter, including integrated into one piece and coaxial handle of a knife 1, cutter arbor 2, bearing installation pole 4 and two blades 6. The front end of the cutter rod 2 is provided with a round table part 3 with a large front part and a small back part, and the round table part 3 is provided with two centrosymmetric blade mounting openings 8 (taking the circle center of the end surface of the large end of the round table part 3 as a symmetric center). Each blade mounting opening 8 penetrates from the large end to the small end of the circular table portion 3, the side wall of one side of each blade mounting opening 8 is a rhombic blade positioning surface, the blade positioning surfaces are parallel to the axis of the circular table portion 3, namely the edge of one outer side of each blade positioning surface is a bus of the circular table portion 3, the edge of the other inner side of each blade positioning surface is parallel to the bus, and the two edges are respectively arranged on the end face of the large end of the circular table portion 3 and the connecting position of the small end and the cutter bar 2.
The side wall 9 on the other side of the blade mounting opening 8 is located clockwise of the blade positioning surface, and extends outwards along the inner edge of the blade positioning surface to the outer wall of the circular table portion 3, and in fig. 2, the side wall 9 is perpendicular to the blade positioning surface. The rhombic blade 6 is a mechanically clamped blade, the size and the shape of the blade are matched with each other, the blade is locked on the blade positioning surface through the locking screw 7, a certain distance is kept between the inner side edges of the blades 6 of the two blade mounting openings 8, and therefore the joint of the bearing mounting rod 4 and the end face of the circular truncated cone is high in strength and not prone to fracture. The bearing mounting rod 4 is positioned on the front end surface of the cutter bar 2, and the front end of the bearing mounting rod 4 is provided with a screw hole 5 of a bearing locking screw, which is similar to the prior art and is not described in detail here.
The utility model discloses a theory of operation is: the utility model discloses install the blade 6 of two symmetries, boss portion 3 has increased the diameter of cutter arbor 2, can make bearing installation pole 4 improve with cutter arbor 2's joint strength, difficult fracture. And the utility model provides a blade locating surface personally submits the rhombus, can fix a position blade 6 in the installation, need not the position of frequent adjustment blade 6, directly with blade 6 paste tight blade locating surface after, utilize locking screw 7 locking can, the process is simple, save time, convenient to use.
The above description is only a preferred embodiment of the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. The utility model provides a flat-bottom counter bore boring cutter, includes integrated into one piece and coaxial handle of a knife (1), cutter arbor (2), bearing installation pole (4) and blade (6), its characterized in that: the front end of the cutter bar (2) is provided with a round table part (3) with a large front end and a small rear end, the round table part (3) is provided with two centrosymmetric blade mounting openings (8), each blade mounting opening (8) is arranged from the large end of the round table part (3) to the small end, the side wall of one side of each blade mounting opening (8) is a rhombic blade positioning surface, the blade positioning surfaces are parallel to the axis of the round table part (3), the side wall (9) of the other side of each blade mounting opening (8) extends outwards to the outer wall of the round table part (3) along the inner side edge of each blade positioning surface, the rhombic blades (6) are matched with the blade positioning surfaces in shape and locked on the positioning surfaces through locking screws (7), and a certain distance is kept between the inner side edges of the blades (6) of the two blade mounting openings (8).
2. The flat bottom counterbore boring tool of claim 1 wherein: the bearing mounting rod (4) is located on the front end face of the cutter bar (2), and a screw hole (5) of a bearing locking screw is formed in the front end of the bearing mounting rod (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921704339.4U CN210817502U (en) | 2019-10-11 | 2019-10-11 | Flat-bottom counter bore boring cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921704339.4U CN210817502U (en) | 2019-10-11 | 2019-10-11 | Flat-bottom counter bore boring cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210817502U true CN210817502U (en) | 2020-06-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921704339.4U Active CN210817502U (en) | 2019-10-11 | 2019-10-11 | Flat-bottom counter bore boring cutter |
Country Status (1)
| Country | Link |
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| CN (1) | CN210817502U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114393226A (en) * | 2022-01-27 | 2022-04-26 | 深圳市毅克利刀具有限公司 | Double-blade inner hole boring cutter for machine tool |
-
2019
- 2019-10-11 CN CN201921704339.4U patent/CN210817502U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114393226A (en) * | 2022-01-27 | 2022-04-26 | 深圳市毅克利刀具有限公司 | Double-blade inner hole boring cutter for machine tool |
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