CN219004693U

CN219004693U - Machining cutter for counter bores in front and back

Info

Publication number: CN219004693U
Application number: CN202223595322.4U
Authority: CN
Inventors: 赵文宴; 余小兵; 吴一凡; 陈华; 邱雪峰; 杨磊
Original assignee: China Erzhong Group Deyang Heavy Industries Co Ltd
Current assignee: China Erzhong Group Deyang Heavy Industries Co Ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-05-12
Anticipated expiration: 2032-12-30

Abstract

The utility model discloses a front and back counter bore machining cutter, which comprises a cutter bar and a blade arranged on the cutter bar; one end of the cutter bar is provided with a long hole which is arranged along the axial direction of the cutter bar; the cutter bar is provided with a pin shaft penetrating through the long hole, and the axis L1 of the cutter bar is perpendicular to the axis L2 of the pin shaft; the center of the blade is rotatably mounted through a pin shaft, and the two sides of the long-strip-shaped blade along the axis L3 of the blade are provided with cutting edges which are parallel to the axis L3 of the blade; when the blade is retracted, the blade is positioned in the long hole; when the cutter bar rotates around the self axis L1 and the blade stretches out for processing, the cutting edge of the blade is positioned outside the long hole, and the axis L1 of the cutter bar and the axis L2 of the pin shaft are perpendicular to the axis L3 of the blade. Has the advantages of simple structure, low manufacturing cost, strong cutter bar rigidity, long service life and the like.

Description

Machining cutter for counter bores in front and back

Technical Field

The utility model belongs to the technical field of machining, and particularly relates to a machining tool for a positive and negative counter bore.

Background

To planarize the joint surfaces of the parts, counter bores are typically machined in the parts, namely: the head of the fastener is fully countersunk into the stepped bore of the part.

The front counter bores refer to holes with stepped axial ends. An automatic forward and reverse countersink is disclosed in the patent document of application number 201910990089.3. The cutter for machining the front counter bore and the back counter bore generally comprises a cutter body and a cutter blade arranged on the cutter body, and the cutter blade realizes automatic ejection and retraction of the cutter blade along the radial direction through a telescopic regulator arranged in the cutter body. When the forward counter bore is machined, the blade is in a retracted state; when the reverse counter bore is machined, the blade is in an ejected state. The cutter body has the advantages of convenience in processing, high processing efficiency and the like, but because more mechanisms are arranged in the cutter body, the cutter body has complex structure and high manufacturing cost, and the rigidity of the cutter body is reduced, so that the cutter body has shorter service life.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a positive and negative counter bore machining cutter with a simple structure.

The technical scheme adopted for solving the technical problems is as follows: the front and back counter bore machining tool comprises a cutter bar and a blade arranged on the cutter bar; a long hole is formed in one end of the cutter bar, and the long hole is arranged along the axial direction of the cutter bar;

the cutter bar is provided with a pin shaft penetrating through the long hole, and the axis L1 of the cutter bar is perpendicular to the axis L2 of the pin shaft;

the center of the blade is rotatably mounted through the pin shaft, and the two sides of the strip-shaped blade along the axis L3 of the blade are provided with cutting edges which are parallel to the axis L3 of the blade;

when the blade is retracted, the blade is positioned in the long hole;

when the cutter bar rotates around the self axis L1 and the blade stretches out for processing, the cutting edge of the blade is positioned outside the long hole, and the axis L1 of the cutter bar and the axis L2 of the pin shaft are perpendicular to the axis L3 of the blade.

Further, a groove communicated with the long hole is formed in the cutter bar;

the groove is arranged along a generatrix of the cutter bar and extends in a direction away from the long hole.

Further, the cutter bar is of a cylindrical structure, and the grooves are arranged along the axial direction of the cutter bar.

Further, the blade is a cemented carbide article.

Compared with the prior art, the utility model has the beneficial effects that: the utility model provides a front and back counter bore machining cutter which has the advantages of simple structure, low manufacturing cost, strong cutter bar rigidity, long service life and the like.

Drawings

FIG. 1 is a schematic view of the blade of the present utility model as it is retracted;

FIG. 2 is a schematic view of the blade of the present utility model with the blade extended;

FIG. 3 is a schematic side elevational view of the present utility model;

FIG. 4 is a schematic illustration of the machining of a forward counterbore by the present utility model;

FIG. 5 is a schematic illustration of the machining of a counter bore by the present utility model;

reference numerals: 1-a cutter bar; 101-long holes; 102-grooves; 2-blade; 201-cutting edge; 3-pin shafts; 4-a knife holder; 5-a workpiece; 501-positioning holes.

Detailed Description

The utility model will be further described with reference to the drawings and examples.

The front and back counter bore machining tool comprises a cutter bar 1 and a blade 2 arranged on the cutter bar 1; a long hole 101 is formed in one end of the cutter bar 1, and the long hole 101 is arranged along the axial direction of the cutter bar 1; the cutter bar 1 is provided with a pin shaft 3 penetrating through the long hole 101, and the axis L1 of the cutter bar 1 is perpendicular to the axis L2 of the pin shaft 3; the center of the blade 2 is rotatably mounted through the pin shaft 3, and cutting edges 201 are arranged on two sides of the strip-shaped blade 2 along the self axis L3, and the cutting edges 201 are parallel to the axis L3 of the blade 2; when the blade 2 is retracted, the blade 2 is positioned in the long hole 101; when the cutter bar 1 rotates around the own axis L1 and the blade 2 extends out for processing, the cutting edge 201 of the blade 2 is located outside the long hole 101, and the axis L1 of the cutter bar 1 and the axis L2 of the pin shaft 3 are perpendicular to the axis L3 of the blade 2.

The end of the cutter bar 1 remote from the slot 101 is connected to the cutter holder 4. The cutter bar 1 is arranged vertically with the end provided with the long hole 101 facing downward. The blade 2 is mounted on the cutter bar 1 by a pin 3, and the blade 2 is rotatable about an axis L2 of the pin 3 and is retractable into the long hole 101 or extendable from the long hole 101. The workpiece 5 is provided with a positioning hole 501 for the cutter bar 1 to pass through. When feeding in a vertically downward direction, the blade 2 is retracted within the elongated hole 101. When the blade 2 reaches the processing station, a motor on the machine tool drives the cutter bar 1 to rotate around the axis L1 of the cutter bar, and under the action of centrifugal force, the blade 2 rotates around the pin shaft 3 and stretches out to process the counter bore. At this time, the cutting edge 201 of the insert 2 is located outside the long hole 101, and the axis L1 of the holder 1 and the axis L2 of the pin 3 are perpendicular to the axis L3 of the insert 2. Then, the axis L1 of the cutter bar 1 and the axis L2 of the pin 3 are perpendicular to the cutting edge 201. With a space rectangular coordinate system as a reference system, the axis L1 of the cutter bar 1 is parallel to the z axis, the axis L3 of the blade 2 is parallel to the x axis, and the axis L2 of the pin shaft 3 is parallel to the y axis. Machining of the forward counter bore and the reverse counter bore can be achieved by the blade 2. As shown in fig. 4, the insert 2 is used for machining a forward counter bore in the workpiece 5, i.e., the insert 2 is used for countersinking the workpiece 5 in the forward direction. As shown in fig. 5, the insert 2 is countersunk in the reverse direction in the workpiece 5, i.e., the insert 2 is countersunk in the reverse direction in the workpiece 5. Firstly, feeding vertically downwards, and when the blade 2 reaches a forward counter bore machining station at the positioning hole 501, driving the cutter bar 1 to rotate around the axis L1 of the cutter bar by a motor, and extending the blade 2 to perform forward counter bore machining. After the forward counter bore is machined, an operator pushes the blade 2 by using a fine iron rod, so that the blade 2 rotates around the axis L2 of the pin shaft 3, and further the blade is retracted into the long hole 101. Then, feeding is continued vertically downwards, and when the blade 2 reaches a counter bore machining station at the positioning hole 501, the motor drives the cutter bar 1 to rotate around the axis L1 of the cutter bar, and the blade 2 stretches out to perform counter bore machining. After the reverse counter bore is machined, an operator pushes the blade 2 by using a fine iron rod, so that the blade 2 rotates around the axis L2 of the pin shaft 3, and then the blade is retracted into the long hole 101, and finally the blade is retracted vertically upwards. Has the advantages of simple structure, low manufacturing cost, strong rigidity of the cutter bar 1, long service life and the like.

For the convenience of the operator, preferably, the cutter bar 1 is provided with a groove 102 communicated with the long hole 101; the recess 102 is arranged along a generatrix of the cutter bar 1 and extends in a direction away from the long hole 101. The groove 102 plays a role in guiding the fine iron rod, so that an operator can aim the fine iron rod at the blade 2 conveniently, and the blade 2 is pushed accurately.

The cutter bar 1 has various structures, preferably, the cutter bar 1 has a cylindrical structure, and the groove 102 is arranged along the axial direction of the cutter bar 1. When the cutter bar 1 is of a cylindrical structure, a generatrix of the outer peripheral surface of the cutter bar 1 is parallel to the axis L1 of the cutter bar 1, and the groove 102 is arranged along the axial direction of the cutter bar 1.

The insert 2 may be a steel product or a cemented carbide product.

The implementation process shows that the utility model provides the front and back counter bore processing cutter which has the advantages of simple structure, low manufacturing cost, strong cutter bar rigidity, long service life and the like.

Claims

1. The front and back counter bore machining tool comprises a cutter bar (1) and a blade (2) arranged on the cutter bar (1); the method is characterized in that: a long hole (101) is formed in one end of the cutter bar (1), and the long hole (101) is arranged along the axial direction of the cutter bar (1);

a pin shaft (3) penetrating through the long hole (101) is arranged on the cutter bar (1), and the axis L1 of the cutter bar (1) is perpendicular to the axis L2 of the pin shaft (3);

the center of the blade (2) is rotatably mounted through the pin shaft (3), the two sides of the strip-shaped blade (2) along the self axis L3 are provided with cutting edges (201), and the cutting edges (201) are parallel to the axis L3 of the blade (2);

when the blade (2) is retracted, the blade (2) is positioned in the long hole (101);

when the cutter bar (1) rotates around the self axis L1 and the blade (2) stretches out for processing, the cutting edge (201) of the blade (2) is positioned outside the long hole (101), and the axis L1 of the cutter bar (1) and the axis L2 of the pin shaft (3) are perpendicular to the axis L3 of the blade (2).

2. The counter bore machining tool of claim 1, wherein: a groove (102) communicated with the long hole (101) is formed in the cutter bar (1);

the groove (102) is arranged along a generatrix of the cutter bar (1) and extends in a direction away from the long hole (101).

3. The counter bore machining tool according to claim 2, wherein: the cutter bar (1) is of a cylindrical structure, and the grooves (102) are arranged along the axial direction of the cutter bar (1).

4. The counter bore machining tool of claim 1, wherein: the blade (2) is a hard alloy product.