CN216575746U

CN216575746U - Ball end milling cutter for machining blade of aircraft engine

Info

Publication number: CN216575746U
Application number: CN202122962350.4U
Authority: CN
Inventors: 覃小军; 周继德; 肖文龙
Original assignee: Chengdu Yuyuan Aviation Intelligent Manufacturing Co ltd
Current assignee: Chengdu Yuyuan Aviation Intelligent Manufacturing Co ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-05-24
Anticipated expiration: 2031-11-30

Abstract

The utility model provides a ball end milling cutter for machining an aircraft engine blade, and relates to the technical field of machining equipment. This bulb milling cutter is used in processing of aeroengine blade includes handle of a knife and the cutter arbor of connecting through coupling mechanism, and the end connection of cutter arbor has the tool bit, is equipped with the chip groove on the tool bit. One end of the knife handle is in transmission connection with a main shaft of a machine tool, the other end of the knife handle is provided with a connecting groove, and the bottom of the connecting groove is fixedly provided with a plug board. One end of the cutter bar is inserted into the connecting groove, and the cutter bar is provided with a slot matched with the inserting plate. The connecting mechanism comprises a screw connector, a connecting sleeve, a first connecting rod, a second connecting rod and a connecting lug. The screw connector is coaxial with the connecting sleeve and is rotationally connected with the connecting sleeve, and the screw connector is in threaded connection with the knife handle. One end of the first connecting rod is connected with the connecting sleeve, the other end of the first connecting rod is connected with the second connecting rod, and the connecting lug is fixed on the cutter bar. When the cutter head is damaged, the cutter bar can be detached from the cutter handle and replaced by a new cutter bar and a new cutter head, and the whole cutter handle, the cutter bar and the cutter head do not need to be replaced.

Description

Ball end milling cutter for machining blade of aircraft engine

Technical Field

The utility model relates to the technical field of machining equipment, in particular to a ball end milling cutter for machining an aircraft engine blade.

Background

The ball end milling cutter, also called R cutter or ball cutter, is used for milling various curved surfaces and circular arc grooves. The ball end milling cutter comprises a cutter handle, a cutter bar and a cutter head which are sequentially connected, the cutter handle is in transmission connection with a machine tool spindle, and a cutting edge for processing a workpiece is arranged on the cutter head.

The problem that present ball end mill exists is, handle of a knife and cutter arbor fixed connection, after the cutting edge on the tool bit damages, need change handle of a knife, cutter arbor and tool bit together, and this has both caused the waste, has also increased the cost.

SUMMERY OF THE UTILITY MODEL

In view of the above situation, the utility model provides a ball end mill for machining an aircraft engine blade, which solves the technical problems that the existing cutter handle is fixedly connected with the cutter rod, and when a cutting edge on the cutter head is damaged, the cutter handle, the cutter rod and the cutter head need to be replaced together, so that waste is caused, and the cost is increased.

In order to achieve the purpose, the utility model provides the following technical scheme:

a ball end mill for machining an aircraft engine blade mainly comprises: the end part of the cutter rod is connected with a cutter head, and a chip groove is arranged on the cutter head. One end of the cutter handle is in transmission connection with a main shaft of the machine tool, the other end of the cutter handle is provided with a connecting groove, and the bottom of the connecting groove is fixedly provided with a plug board. One end of the cutter bar is inserted into the connecting groove, and a slot matched with the inserting plate is formed in the cutter bar. The connecting mechanism comprises a screw connector, a connecting sleeve, a first connecting rod, a second connecting rod and a connecting lug. The screw connector is coaxial with the connecting sleeve and is rotationally connected with the connecting sleeve, and the screw connector is in threaded connection with the knife handle. The first connecting rod, the second connecting rod and the connecting lug are sequentially connected, one end of the first connecting rod is connected with the connecting sleeve, the other end of the first connecting rod is connected with the second connecting rod, and the connecting lug is fixed on the cutter bar.

In some embodiments of the present invention, a first connecting block is fixed on the connecting sleeve, one end of the first connecting rod is detachably connected to the first connecting block, the other end of the first connecting rod is connected to the second connecting rod, one end of the second connecting rod is detachably connected to the second connecting block, and the second connecting block is connected to the connecting lug.

In some embodiments of the present invention, the first link is connected to the first link block by a first connecting pin, and the second link is connected to the second link block by a second connecting pin.

In some embodiments of the present invention, one end of the first connecting rod is inserted into the second connecting rod, the first connecting rod has an internal thread, the second connecting rod has an external thread matching with the internal thread, and the second connecting rod is slidably connected to the connecting lug.

In some embodiments of the utility model, the connecting lug is provided with a guide part, and the bottom of the second connecting block is connected with a sliding sleeve sleeved on the guide part.

In some embodiments of the utility model, the plurality of engaging lugs are arranged along the circumference of the cutter bar at equal intervals.

In some embodiments of the utility model, the plurality of insert plates are arranged at the bottom of the connecting groove at intervals, a pressure spring is arranged between any two adjacent insert plates, the lower end of the pressure spring is connected with a resisting block, and the resisting block is butted against the end part of the cutter bar.

In some embodiments of the utility model, the diameter of the lower portion of the shank is gradually reduced from top to bottom, and the lower portion of the shank is threadedly connected with a locking ring. When the locking ring is rotated to move upwards, the acting force of the locking ring on the knife handle is increased.

The embodiment of the utility model at least has the following advantages or beneficial effects:

1. when connecting handle of a knife and cutter arbor, cup joint adapter sleeve and spiro union piece earlier on the handle of a knife to make the upper portion of cutter arbor peg graft in the spread groove, the picture peg is pegged graft mutually with the slot, and rotatory spiro union piece of rethread instrument makes spiro union piece threaded connection can realize being connected handle of a knife and cutter arbor on the handle of a knife. When the cutter bar needs to be disassembled, the cutter bar can be taken down from the cutter handle only by reversely rotating the screw connector to separate the screw connector from the cutter handle. When the cutter head is damaged, the cutter bar can be detached from the cutter handle and replaced by a new cutter bar and a new cutter head, and the whole cutter handle, the cutter bar and the cutter head do not need to be replaced.

2. When the screw connector is rotated, the screw connector can drive the connecting sleeve to move upwards or downwards, and when the connecting sleeve moves upwards, the cutter bar can be moved upwards through the first connecting rod and the second connecting rod so as to adjust the length of the part of the cutter bar exposed from the connecting groove, and the use flexibility of the ball end milling cutter for machining the blades of the aircraft engine is improved.

Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the specification, claims and drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural view of a ball end mill for machining an aircraft engine blade;

FIG. 2 is a schematic structural view of the rotational connection between the screw member and the connecting sleeve;

FIG. 3 is an enlarged view of a portion of the portion A of FIG. 1;

FIG. 4 is an enlarged view of a portion of FIG. 1 at position B;

fig. 5 is a partial enlarged view of the position C in fig. 1.

Icon:

11-knife handle, 111-connecting groove, 112-inserting plate,

12-a knife bar, 121-a slot,

13-a cutter head, 131-a chip groove,

141-a screw connector, 142-a connecting sleeve, 143-a first connecting rod, 144-a second connecting rod, 145-a connecting lug, 146-a pressure spring, 147-a resisting block, 148-a locking ring, 149-a first connecting block, 151-a second connecting block, 152-a first connecting pin, 153-a second connecting pin, 154-a guide part, 155-a sliding sleeve, 156-a connecting port and 157-a convex part.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the embodiments of the utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Examples

Referring to fig. 1 to 5, the present embodiment provides a ball end mill for machining an aircraft engine blade, which mainly includes: the tool comprises a tool handle 11 and a tool bar 12 which are connected through a connecting mechanism, wherein the end part of the tool bar 12 is connected with a tool bit 13, and the tool bit 13 is provided with a chip groove 131. One end of the tool shank 11 is in transmission connection with a main shaft of a machine tool, the other end of the tool shank is provided with a connecting groove 111, and the bottom of the connecting groove 111 is fixedly provided with a plug board 112. One end of the knife bar 12 is inserted into the connecting groove 111, and the knife bar 12 is provided with a slot 121 matched with the inserting plate 112. The connecting mechanism comprises a screw 141, a connecting sleeve 142, a first connecting rod 143, a second connecting rod 144 and a connecting lug 145. The screw 141 is coaxial with the connecting sleeve 142, and the screw 141 and the connecting sleeve are rotatably connected, and the screw 141 is in threaded connection with the knife handle 11. The first connecting rod 143, the second connecting rod 144 and the connecting lug 145 are sequentially connected, one end of the first connecting rod 143 is connected with the connecting sleeve 142, the other end of the first connecting rod 143 is connected with the second connecting rod 144, and the connecting lug 145 is fixed on the cutter bar 12.

When the tool holder 11 and the tool bar 12 are connected, the connecting sleeve 142 and the screw 141 are firstly sleeved on the tool holder 11, the upper part of the tool bar 12 is inserted into the connecting groove 111, the inserting plate 112 is inserted into the inserting groove 121, and then the screw 141 is rotated by a tool, so that the screw 141 is connected to the tool holder 11 in a threaded manner, and the connection between the tool holder 11 and the tool bar 12 can be realized. When the tool bar 12 needs to be disassembled, the screw connector 141 only needs to be rotated reversely, so that the screw connector 141 is separated from the tool shank 11, and the tool bar 12 can be taken down from the tool shank 11. When the tool bit 13 is damaged, the tool bar 12 can be removed from the tool shank 11 and replaced with a new tool bar 12 and tool bit 13, without replacing the tool shank 11, tool bar 12 and tool bit 13 as a whole. In addition, when the screw joint 141 is rotated, the screw joint 141 can drive the connecting sleeve 142 to move up or down, and when the connecting sleeve 142 moves up, the cutter bar 12 can be moved up through the first connecting rod 143 and the second connecting rod 144 to adjust the length of the part of the cutter bar 12 exposed from the connecting groove 111, so that the use flexibility of the ball end mill for machining the blade of the aircraft engine is improved.

The plurality of insert plates 112 are arranged at the bottom of the connecting groove 111 at intervals, a pressure spring 146 is arranged between any two adjacent insert plates 112, the lower end of the pressure spring 146 is connected with a resisting block 147, and the resisting block 147 is abutted to the end part of the cutter bar 12. The pressure spring 146 can act on the cutter bar 12, so that the cutter bar 12 tends to move downwards, and the cutter bar 12 pulls the screw 141 and the connecting sleeve 142 downwards through the first connecting rod 143 and the second connecting rod 144, which can prevent the screw 141 from loosening to a certain extent.

Because there is an assembly gap between the insert plate 112 and the slot 121, in order to avoid the guide bar shaking, the diameter of the lower portion of the hilt 11 can be gradually reduced from top to bottom, and the lower portion of the hilt 11 is threadedly connected with the locking ring 148. When the locking ring 148 is rotated, the locking ring 148 is moved upward, and at this time, the force of the locking ring 148 on the tool shank 11 is increased, and the tool shank 11 acts on the tool shank 12 again, so that the outer wall of the insert plate 112 is closely attached to the inner wall of the slot 121.

Specifically, the method comprises the following steps:

in this embodiment, the rotational connection between the screw member 141 and the connecting sleeve 142 is realized as follows: the lower part of the screw 141 is provided with a connecting port 156, the upper part of the connecting sleeve 142 is provided with a convex part 157, and the convex part 157 is rotatably connected in the connecting port 156.

The connecting sleeve 142 is fixed with a first connecting block 149, one end of the first connecting rod 143 is detachably connected with the first connecting block 149, the other end of the first connecting rod 143 is connected with the second connecting rod 144, one end of the second connecting rod 144 is detachably connected with a second connecting block 151, and the second connecting block 151 is connected to the connecting lug 145. More specifically, the first link 143 is connected to the first link block 149 by a first connecting pin 152, so as to facilitate the removal and replacement of the first link 143. The second link 144 is connected to the second connection block 151 by a second connection pin 153, so that the first link can be easily disassembled and replaced. The first link 143 can be removed when the first connecting pin 152 is removed, and the second link 144 can be removed when the second connecting pin 153 is removed.

One end of the first link 143 is inserted into the second link 144, the first link 143 has an internal thread, the second link 144 has an external thread matching the internal thread, and the second connecting block 151 is slidably connected to the connecting lug 145. After the second connecting rod 144 is detached from the second connecting block 151, the second connecting rod 144 can be rotated, which can adjust the length of the portion of the second connecting rod 144 exposed from the first connecting rod 143, and can also move the guide rod up or down, so as to improve the flexibility of the ball end mill for machining the aero-engine blade.

In this embodiment, the sliding connection of the second connecting block 151 and the connecting lug 145 is achieved by: the connecting lug 145 is provided with a guide part 154, and the bottom of the second connecting block 151 is connected with a sliding sleeve 155 sleeved on the guide part 154.

In order to better connect the tool shank 12 and the tool shank 11, a plurality of connecting lugs 145 are arranged at equal intervals along the circumferential direction of the tool shank 12.

Finally, it should be noted that: the present invention is not limited to the above-described preferred embodiments, but various modifications and changes can be made by those skilled in the art, and the embodiments and features of the embodiments of the present invention can be combined with each other arbitrarily without conflict. 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

1. The utility model provides an aeroengine is ball end mill for blade processing which characterized in that includes: the tool comprises a tool handle and a tool bar which are connected through a connecting mechanism, wherein the end part of the tool bar is connected with a tool bit, and the tool bit is provided with a chip groove;

one end of the cutter handle is in transmission connection with a main shaft of the machine tool, the other end of the cutter handle is provided with a connecting groove, and the bottom of the connecting groove is fixedly provided with a plug board;

one end of the cutter bar is inserted into the connecting groove, and a slot matched with the inserting plate is formed in the cutter bar;

the connecting mechanism comprises a screw connector, a connecting sleeve, a first connecting rod, a second connecting rod and a connecting lug; the screw connector is coaxial with the connecting sleeve and is rotationally connected with the connecting sleeve, and the screw connector is in threaded connection with the knife handle; the first connecting rod, the second connecting rod and the connecting lug are sequentially connected, one end of the first connecting rod is connected with the connecting sleeve, the other end of the first connecting rod is connected with the second connecting rod, and the connecting lug is fixed on the cutter bar.

2. The ball nose milling cutter for machining the blade of the aircraft engine as claimed in claim 1, wherein a first connecting block is fixed on the connecting sleeve, one end of the first connecting rod is detachably connected to the first connecting block, one end of the second connecting rod is detachably connected to a second connecting block, and the second connecting block is connected to the connecting lug.

3. The ball nose mill for machining an aircraft engine blade according to claim 2, wherein the first link is connected to the first connecting block by a first connecting pin, and the second link is connected to the second connecting block by a second connecting pin.

4. The ball nose mill for machining an aircraft engine blade according to claim 2, wherein one end of the first link is inserted into the second link, the first link has an internal thread, the second link has an external thread matching the internal thread, and the second link is slidably coupled to the coupling lug.

5. The ball nose milling cutter for machining the blade of the aircraft engine as defined in claim 4, wherein the connecting lug is provided with a guide portion, and a sliding sleeve sleeved on the guide portion is connected to the bottom of the second connecting block.

6. The ball nose cutter for machining an aircraft engine blade according to claim 1, wherein the plurality of engaging lugs are provided at equal intervals in a circumferential direction of the cutter bar.

7. The ball end mill for machining the blade of the aircraft engine as claimed in any one of claims 1 to 6, wherein a plurality of the insert plates are arranged at the bottom of the connecting groove at intervals, a pressure spring is installed between any two adjacent insert plates, a resisting block is connected to the lower end of the pressure spring, and the resisting block abuts against the end of the cutter bar.

8. The ball end mill for machining the blade of the aircraft engine as defined in any one of claims 1 to 6, wherein the diameter of the lower portion of the shank is gradually reduced from top to bottom, and a locking ring is screwed to the lower portion of the shank; when the locking ring is rotated to move upwards, the acting force of the locking ring on the knife handle is increased.