CN215698259U

CN215698259U - Angle counter bit capable of limiting

Info

Publication number: CN215698259U
Application number: CN202121958297.4U
Authority: CN
Inventors: 洪常意; 王洪亮; 张秀云
Original assignee: Shenyang Aircraft Industry Group Co Ltd
Current assignee: Shenyang Aircraft Industry Group Co Ltd
Priority date: 2021-08-19
Filing date: 2021-08-19
Publication date: 2022-02-01
Anticipated expiration: 2031-08-19

Abstract

The utility model provides a can spacing angle countersink drill, belongs to the machine-building field, including cutter body, blade, guide shaft, protection bush, stop collar, position sleeve. And a blade groove is milled at the conical surface of the front part of the cutter body and is welded with the blade. The left end surface of the cutter body is provided with a taper hole which is connected with the conical surface of the guide shaft. The middle part of the cutter body is of a threaded structure and is sequentially connected with the limiting sleeve and the positioning sleeve through threads. The tail part of the cutter body is a clamping part and is connected with a power device. The guide shaft outside be equipped with the protection bush, protection bush hole and guide shaft adopt clearance fit, the protection bush is used for putting into the part machining bottom outlet. The utility model has compact structure, small size, flexibility, simple manufacture and convenient operation, can be used in narrow space of an airplane, can accurately and quickly realize chamfering processing of the bearing mounting hole, solves the technical problem of production and improves the production efficiency.

Description

Angle counter bit capable of limiting

Technical Field

The utility model belongs to the field of machine manufacturing, and relates to a limitable angle countersink drill which is applied to machining of an edge chamfer of a bearing mounting hole of an airplane.

Background

The precision of the aircraft bearing mounting hole is high, the hole edge needs to be chamfered, and the chamfering depth has specific requirements. The aircraft space is narrow and small, can't use complicated stop device during the chamfer, and the degree of depth of ordinary chamfer instrument uncontrollable chamfer can not satisfy the processing demand. Based on the problems, the utility model provides a limitable angle countersink drill and a using method thereof.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems that the chamfering of the bearing mounting hole on the airplane is difficult and the chamfering depth cannot be controlled by a common chamfering tool, the utility model creates the limiting angle countersink and the use method thereof, and can realize the limiting chamfering of the bearing mounting hole.

In order to achieve the purpose, the utility model adopts the technical scheme that:

the utility model provides a but spacing angle countersink drill, includes cutter body 1, blade 2, guide shaft 3, protection bush 4, stop collar 5, position sleeve 6.

And a blade groove is milled at the conical surface of the front part of the cutter body 1 and is welded with the blade 2. The left end surface of the cutter body 1 is provided with a taper hole which is connected with the conical surface of the guide shaft 3. The middle part of the cutter body 1 is of a threaded structure and is sequentially connected with the limiting sleeve 5 and the positioning sleeve 6 through threads. The tail part of the cutter body 1 is a clamping part for connecting a user with a power device. The outside of guide shaft 3 be equipped with protection bush 4, the clearance fit is adopted with guide shaft 3 to 4 holes of protection bush, protection bush 4 is used for putting into the part processing bottom outlet.

Further, the thread pitch of the thread part is 1mm, and the thread part is used for adjusting the exposed length of the cutting edge of the countersink drill according to the machining requirement.

The use of the angle countersink drill capable of limiting comprises the following steps:

step 1: the guide shaft 3 is arranged in the cutter body 1 and pressed tightly. The limiting sleeve 5 and the positioning sleeve 6 are respectively rotated into the threaded part of the cutter body.

Step 2: the position of the limiting sleeve 5 is adjusted by rotation, and then the positioning sleeve 6 is screwed with the limiting sleeve 5.

And step 3: and (4) placing the protective bush 4 into a part processing bottom hole, and connecting the cutter body clamping part with a power device. The guide shaft 3 is extended into the protective bush 4 to start processing, and the processing is stopped when the stop collar 5 contacts the end face of the workpiece.

And 4, step 4: and (5) withdrawing the countersink drill, taking out the protective bush 4 and finishing chamfering.

The utility model has the beneficial effects that: the angle countersink drill capable of limiting has the advantages of compact structure, small size, flexibility, simplicity in manufacturing and convenience in operation, can be used in a narrow space of an airplane, can accurately and quickly realize chamfering processing of a bearing mounting hole, solves the technical problem of production, and improves production efficiency.

Drawings

FIG. 1 is a schematic diagram of a structure of a limitable angle countersink drill;

in the figure: 1, a cutter body; 2, cutting blades; 3, guiding a shaft; 4 protecting the lining; 5, a limiting sleeve; 6, positioning sleeves.

Detailed Description

The present invention is further illustrated by the following specific examples.

A limitable angle countersink drill comprises a cutter body 1; a blade 2; a guide shaft 3; a protective bush 4; a stop collar 5; and a positioning sleeve 6.

The conical surface of the front part of the cutter body 1 mills a blade groove and is welded with the blade 2. The left end surface of the cutter body 1 is provided with a taper hole which is connected with the conical surface of the guide shaft 3. The middle part of the cutter body 1 is of a threaded structure and is in threaded connection with the limiting sleeve 5 and the positioning sleeve 6. The tail part of the cutter body 1 is a clamping part for connecting a user with a power device. The guide shaft 3 is externally provided with a protective bush 4 which is in clearance fit with the guide shaft 3.

The thread pitch of the thread part is 1mm, and the length of the exposed cutting edge of the countersink drill can be adjusted conveniently according to the processing requirement. After the position of the limiting sleeve 5 is determined, the positioning sleeve 6 and the limiting sleeve 5 are screwed tightly, and the double-nut structure positioning is realized. The excircle of the protective bush 4 adopts 7-grade tolerance, so that higher positioning precision exists between the protective bush and a bottom hole of a part. The inner hole of the protective bush 4 is in clearance fit with the guide shaft 3 by adopting an H9/f9 base hole system, and the stability of guiding and the smoothness of cutter rotation can be considered.

And step 3: and (4) putting the protective bush 4 into the bottom hole to be processed, and connecting the clamping part of the cutter body with a power device. During machining, the guide shaft 3 is inserted into the protective bushing 4 to start machining, and when the limiting sleeve 5 contacts the end face of the workpiece, machining is stopped.

The above-mentioned embodiments only express the embodiments of the present invention, but not should be understood as the limitation of the scope of the utility model patent, it should be noted that, for those skilled in the art, many variations and modifications can be made without departing from the concept of the present invention, and these all fall into the protection scope of the present invention.

Claims

1. The angle countersink drill capable of limiting is characterized by comprising a cutter body (1), a blade (2), a guide shaft (3), a protective bushing (4), a limiting sleeve (5) and a positioning sleeve (6);

a blade groove is milled at the conical surface of the front part of the cutter body (1) and is welded with the blade (2); the left end surface of the cutter body (1) is provided with a taper hole which is connected with the conical surface of the guide shaft (3); the middle part of the cutter body (1) is of a threaded structure and is sequentially connected with the limiting sleeve (5) and the positioning sleeve (6) through threads; the tail part of the cutter body (1) is a clamping part and is connected with a power device; a protective bushing (4) is arranged outside the guide shaft (3), an inner hole of the protective bushing (4) is in clearance fit with the guide shaft (3), and the protective bushing (4) is used for placing a part processing bottom hole;

when the tool is used, the guide shaft (3) is firstly arranged in the tool body (1) to be pressed tightly, the limiting sleeve (5) and the positioning sleeve (6) are respectively rotated into the threaded part of the tool body, the position of the limiting sleeve (5) is rotationally adjusted, and the positioning sleeve (6) and the limiting sleeve (5) are screwed tightly; secondly, the protective bush (4) is placed in a part machining bottom hole, the cutter body clamping part is connected with a power device, the guide shaft (3) extends into the protective bush (4) to start machining, and the machining is stopped when the limiting sleeve (5) contacts the end face of a workpiece; and finally, withdrawing the countersink drill, taking out the protective bushing (4) and finishing chamfering.

2. The limitable angle countersink drill according to claim 1, wherein the thread pitch of the thread structure is 1mm, and the length of the exposed cutting edge of the countersink drill is adjusted according to the machining requirement.