CN219254243U

CN219254243U - Angle countersink drill with adjustable depth

Info

Publication number: CN219254243U
Application number: CN202222984860.6U
Authority: CN
Inventors: 张智海; 谢俊; 余志强; 宁湧; 潘建定; 李婕; 谭斌
Original assignee: Jiangxi Changhe Aviation Industries Co Ltd
Current assignee: Jiangxi Changhe Aviation Industries Co Ltd
Priority date: 2022-11-10
Filing date: 2022-11-10
Publication date: 2023-06-27
Anticipated expiration: 2032-11-10

Abstract

The utility model belongs to the field of machine manufacturing, and relates to an angle countersink drill with adjustable depth. The chamfering tool is applied to chamfering with a certain depth requirement on orifice chamfering. The device comprises a guide post (1), an angle countersink drill (2), a limiting sleeve (3), a set screw (4), a positioning sleeve (5), a bearing (6), a cylindrical pin (7) and a cutter bar (8). The guide pillar (1) is connected with a taper hole of the angle countersink (2) through a taper shank into a whole, one end of the angle countersink (2) is provided with an angle consistent with the angle of the orifice chamfer, a cutting edge is arranged on the angle surface of the angle countersink, a waist-shaped hole is radially formed in the cylindrical surface of the other side of the angle countersink, and a notch is formed in the axis of the waist-shaped hole and communicated with the waist-shaped hole. Through the stop collar, can control the degree of depth of drill way chamfer, effectively guaranteed the precision to drill way chamfer degree of depth, solved original appearance big, irregular work piece is with wind rifle manual chamfer precision not high, the poor problem of quality.

Description

Angle countersink drill with adjustable depth

Technical Field

The utility model belongs to the field of machine manufacturing, and relates to an angle countersink drill with adjustable depth. The chamfering tool is applied to chamfering with a certain depth requirement on orifice chamfering.

Background

In the manufacturing process of helicopter aviation parts, the machining of holes is often involved, particularly the chamfering of holes with precision with certain depth requirement, the common machining method is to fix the workpiece clamping on a drilling machine, the drilling machine clamps a common angle countersink, the chamfering depth is controlled by a scale or a dial on the drilling machine, the machining method is easy to ensure the chamfering depth, but has the problems of troublesome workpiece clamping, low machining efficiency, small overall dimension and regular workpiece chamfering machining, but for workpieces with larger overall dimension and irregular workpieces, the machining of chamfering with certain depth requirement of holes on the drilling machine, special fixture and drilling machine equipment with larger specification are required to be designed and manufactured, and the machining method is obviously unsuitable for aviation products with small batch and various types. Therefore, a worker can only adopt the air gun to clamp the angle countersink drill for chamfering, the feeding amount is controlled by measuring the depth for a plurality of times, and the chamfering depth is ensured, but the handheld air gun is unstable, the feeding depth is difficult to master, and the method is difficult to ensure the chamfering depth in general.

Disclosure of Invention

The purpose of the utility model is that: in order to solve the problem that when the external dimension is large and the hole is formed and chamfered on an irregular workpiece, an operator holds an air gun provided with a common countersink to chamfer the hole opening, and the certain depth and quality of chamfering cannot be guaranteed, the utility model provides the depth-adjustable angle countersink design which is simple in structure and manufacturing and can guarantee the chamfering depth of the hole opening on the workpiece.

Technical proposal

The utility model provides an angle countersink of adjustable degree of depth bores, includes guide pillar (1), angle countersink (2), stop collar (3), holding screw (4), locating sleeve (5), bearing (6), cylindric lock (7) and cutter arbor (8).

The guide pillar (1) is connected with a taper hole of the angle countersink (2) through a taper shank into a whole, one end of the angle countersink (2) is provided with an angle consistent with the angle of the orifice chamfer, a cutting edge is arranged on the angle surface of the angle countersink, a waist-shaped hole is radially formed in the cylindrical surface of the other side of the angle countersink, and a notch is formed in the axis of the waist-shaped hole and communicated with the waist-shaped hole.

The angle countersink drill (2) is matched with the cutter bar (8) by a conical surface and is connected into a whole through a cylindrical pin (7) fixed in the radial direction of the cutter bar (8); the inner ring of the bearing (6) is fixed on the angle countersink (2) in a clearance fit manner, and the shaft shoulder on the angle countersink (2) is positioned in the axial direction;

two concentric threaded holes are formed in the radial direction of the positioning sleeve (5), the limiting sleeve (3) is fixed by the threaded holes through a set screw (4), an inner hole of the positioning sleeve (5) is a step hole, and an inner thread is arranged in the small hole and is matched with an outer thread on one side of the limiting sleeve (3); the large hole is a smooth hole and is in interference fit with the outer ring of the bearing (6); the outer circle of the limit sleeve (3) is provided with an external thread, the limit sleeve is connected with the locating sleeve (5) through the external thread, one end of the limit sleeve is provided with an outer cylinder, and the cylindrical end face is provided with three convex claws which limit the joint surface of the convex claws and the part. The other end of the limiting sleeve (3) is provided with an anti-rotation boss with an octagonal section, and the set screw (4) is contacted and clamped with the anti-rotation boss with the octagonal section on the limiting sleeve (3) after passing through a threaded hole of the positioning sleeve (5) to prevent the limiting sleeve (3) from rotating.

The appearance face of claw is the circular cone, reduces and is contacted with part surface area, prevents that the part from being by unexpected fish tail.

The set screw (4) is a standard component.

The outer circle of the locating sleeve (5) is provided with knurling, friction force is increased, and the locating sleeve is antiskid during operation.

The angle countersink drill (2) is made of high-speed steel.

The limiting sleeve (3) is made of aluminum bronze.

Technical effects

1. The depth of the orifice chamfer can be controlled through the limiting sleeve, the precision of the orifice chamfer depth is effectively ensured, and the problems of low manual chamfer precision and poor quality of the air gun for the irregular workpiece with large original appearance are solved;

2. through the guide posts matched with different sizes, the depth-adjustable angle countersink drill can meet chamfering processing of holes with different sizes.

3. The chamfering device is simple in structure, convenient to manufacture and assemble and disassemble, meets the use requirement of clamping the chamfer by adopting the air gun, is high in processing economy, and is beneficial to improving the production efficiency.

4. The utility model can be used for chamfering holes with certain depth on large and small parts, the processing site is not limited by the environment, the practicability is high, and the utility model can be popularized to the traditional manual hole making field.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the structure of an angle countersink;

FIG. 3 is a schematic structural view of a stop collar;

FIG. 4 is a schematic view of the structure of the positioning sleeve;

wherein, 1-guide pillar, 2-angle countersink, 3-stop collar, 4-holding screw, 5-locating sleeve, 6-bearing, 7-cylindric lock, 8-cutter arbor.

Detailed Description

The utility model is further described below with reference to examples. The following description is of some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model provides an angle countersink of adjustable degree of depth, it includes guide pillar (1), angle countersink (2), stop collar (3), holding screw (4), locating sleeve (5), bearing (6), cylindric lock (7) and cutter arbor (8). The guide post (1) is connected with the taper hole of the angle countersink (2) into a whole through the taper shank, the guide post (1) plays a guiding role, and the center of the opening chamfer is ensured to be concentric with the bottom hole. One end of the angle countersink drill (2) is provided with an angle consistent with the angle of the orifice chamfer, the angle surface of the angle countersink drill is provided with a cutting edge, the cylindrical surface of the other side is radially provided with a kidney-shaped hole, and the axis is provided with a notch which is communicated with the kidney-shaped hole. Further, the angle countersink drill (2) is matched with the cutter bar (8) through conical surfaces, the cylindrical pins (7) which are fixed in the radial direction of the cutter bar (8) through interference fit are connected into a whole, the cutter bar (8) which is fixed with the cylindrical pins (7) is through an open waist-shaped hole on the angle countersink drill (2), and the disassembly and assembly of the cutter bar (8) and the angle countersink drill (2) can be easily realized. The inner ring of the bearing (6) is fixed on the angle countersink (2) in a clearance fit manner, and the shaft shoulder on the angle countersink (2) is positioned in the axial direction; the outer circle of the positioning sleeve (5) is knurled, two concentric threaded holes are formed in the radial direction, the inner hole is a step hole, the small hole is a threaded hole, the large hole is a smooth hole, and the large hole is in interference fit with the outer ring of the bearing (6); the outer circle of the limit sleeve (3) is provided with threads, the limit sleeve can be connected with the locating sleeve (5) through the threads, one end of the limit sleeve is an outer cone, the end face of the limit sleeve is provided with three bosses, the other end of the limit sleeve is provided with a boss with an octagonal section, and the further inner hole is a through hole. The set screw (4) is a standard component, and the limiting sleeve (3) can be circumferentially fixed by screwing the two threaded holes radially distributed on the positioning sleeve (5).

The application process of the utility model is as follows:

step 1: the method comprises the steps of (1) enabling an orifice to be chamfered on a workpiece to face upwards, fixing the workpiece, ensuring that the workpiece does not shake under the action of external force, and enabling a chamfering area of the orifice to have a certain operation space;

step 2: firstly, inserting an angle countersink with adjustable depth into a hole with a chamfer on a workpiece, loosening a set screw (4), fixing the angle countersink (2) and a locating sleeve (5) with a certain force, rotating three convex claws of a limiting sleeve (3) to enable the three convex claws to be attached to the surface where the workpiece hole is located, measuring the distance between the end surfaces of the three convex claws of the limiting sleeve (3) and the end surface of a light hole of the locating sleeve (5) with a caliper, and recording;

step 3: taking down the limiting sleeve (3), the set screw (4), the locating sleeve (5) and the bearing (6) which are connected into a whole from the angle countersink drill (2), properly reversely rotating the three convex claws of the limiting sleeve (3), measuring the distances between the end surfaces of the three convex claws of the limiting sleeve (3) and the end surface of the unthreaded hole of the locating sleeve (5) by using a caliper, recording, subtracting the measured value from the value measured last time, calculating the retraction value, enabling the retraction value to be equal to the chamfering depth value of the orifice, namely finishing the adjustment of the chamfering depth limit position of the orifice, and screwing the set screw (4);

step 4: clamping an angle countersink (2) provided with a cutter bar (8) on an air gun, ensuring stable clamping and no jumping phenomenon, sleeving an adjusted limiting sleeve (3) and a positioning sleeve (5) provided with a bearing (6) on the angle countersink (2), putting a guide post (1) of the angle countersink with adjustable depth into a bottom hole, and placing a soft cushion on the surface of a workpiece to prevent scratching the surface of a part;

step 5: the air gun of the clamped angle countersink with adjustable depth is held by one hand, the fixed sleeve (5) is held by the other hand, the pneumatic air gun is started, the hole is chamfered, when the three convex claws of the limiting sleeve (3) are in surface contact with a workpiece, the cutter cannot continue to axially feed, so that the control of the chamfering depth is realized, and meanwhile, the rotation of the air gun is immediately stopped, so that the machining that the hole on the workpiece has a certain depth and chamfering is required is completed.

The guide post (1) is in clearance fit with a bottom hole of the part, plays a guiding role, and ensures that the center of the opening chamfer is concentric with the bottom hole. As shown in the figure 2 of the drawings,

the cutter bar (8) fixed with the cylindrical pin (7) passes through an open waist-shaped hole on the angle countersink (2), so that the cutter bar (8) and the angle countersink (2) can be easily disassembled and assembled.

Example 2

The angle countersink drill with the adjustable depth comprises a guide post (1), an angle countersink drill (2), a limiting sleeve (3), a set screw (4), a positioning sleeve (5), a bearing (6), a cylindrical pin (7) and a cutter bar (8).

two concentric threaded holes are formed in the radial direction of the positioning sleeve (5), the limiting sleeve (3) is fixed by the threaded holes through a set screw (4), an inner hole of the positioning sleeve (5) is a step hole, and an inner thread is arranged in the small hole and is matched with an outer thread on one side of the limiting sleeve (3); the large hole is a smooth hole and is in interference fit with the outer ring of the bearing (6); the outer circle of the limit sleeve (3) is provided with an external thread, the limit sleeve can be connected with the locating sleeve (5) through the external thread, one end of the limit sleeve is provided with an outer cylinder, and the cylindrical end face is provided with three convex claws which limit the joint surface of the convex claws and the part. The other end of the limiting sleeve (3) is provided with an anti-rotation boss with an octagonal section, and the set screw (4) is contacted and clamped with the anti-rotation boss with the octagonal section on the limiting sleeve (3) after passing through a threaded hole of the positioning sleeve (5) to prevent the limiting sleeve (3) from rotating.

The set screw (4) is a standard component;

The angle countersink drill (2) is made of high-speed steel, and the material has high hot hardness and wear resistance, good cutting performance and good processing manufacturability, and meets the use and processing requirements of the angle countersink drill.

The limiting sleeve (3) is made of aluminum bronze, has high strength and antifriction property, and can effectively reduce friction between the convex claw of the limiting sleeve (3) and the surface of a part, so that abrasion of the phase sleeve (3) is reduced, and the chamfering depth of the hole is guaranteed to have higher precision.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. While the foregoing is directed to embodiments of the present utility model, other and further details of the utility model may be had by the present utility model, it should be understood that the foregoing description is merely illustrative of the present utility model and that no limitations are intended to the scope of the utility model, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the utility model.

Claims

1. The angle countersink drill with the adjustable depth is characterized by comprising a guide post (1), an angle countersink drill (2), a limiting sleeve (3), a set screw (4), a positioning sleeve (5), a bearing (6), a cylindrical pin (7) and a cutter bar (8);

the guide post (1) is connected with a taper hole of the angle countersink (2) into a whole through a taper shank, one end of the angle countersink (2) is provided with an angle consistent with the angle of the orifice chamfer, a cutting edge is arranged on the angle surface, a waist-shaped hole is radially formed in the cylindrical surface of the other side, and a notch is arranged on the axis and communicated with the waist-shaped hole;

two concentric threaded holes are formed in the radial direction of the positioning sleeve (5), the limiting sleeve (3) is fixed by the threaded holes through a set screw (4), an inner hole of the positioning sleeve (5) is a step hole, and an inner thread is arranged in the small hole and is matched with an outer thread on one side of the limiting sleeve (3); the large hole is a smooth hole and is in interference fit with the outer ring of the bearing (6); the outer circle of the limit sleeve (3) is provided with an external thread, the limit sleeve is connected with the locating sleeve (5) through the external thread, one end of the limit sleeve is provided with an outer cylinder, the cylindrical end face is provided with three convex claws, and the convex claws are limited with the fitting surface of the part; the other end of the limiting sleeve (3) is provided with an anti-rotation boss with an octagonal section, and the set screw (4) is contacted and clamped with the anti-rotation boss with the octagonal section on the limiting sleeve (3) after passing through a threaded hole of the positioning sleeve (5) to prevent the limiting sleeve (3) from rotating.

2. The depth-adjustable angle countersink drill of claim 1, wherein the outer surface of the claw is conical, so that the contact area with the surface of the part is reduced, and the part is prevented from being scratched accidentally.

3. An adjustable depth angle countersink according to claim 1, characterized in that the set screw (4) is a standard piece.

4. The depth-adjustable angle countersink drill according to claim 1, wherein the outer circle of the positioning sleeve (5) is provided with knurling to increase friction and prevent slipping during operation.

5. An adjustable depth angle countersink drill according to claim 1, characterized in that the angle countersink drill (2) is composed of high speed steel.

6. The depth-adjustable angle countersink drill according to claim 1, wherein the stop collar (3) is made of aluminum bronze.