CN113618123A

CN113618123A - Combined hole drill

Info

Publication number: CN113618123A
Application number: CN202110747442.2A
Authority: CN
Inventors: 史俭六; 陈子彦; 陆凌凯; 郑芳; 张学锋; 赵其芳
Original assignee: Est Tools Co ltd
Current assignee: Est Tools Co ltd
Priority date: 2021-07-02
Filing date: 2021-07-02
Publication date: 2021-11-09

Abstract

The application provides a combined hole drill, including annular fluted cutter, shaping chamfer sword and locking screw, in the base member of shaping chamfer sword embedding annular fluted cutter, with locking screw (3) fixed annular fluted cutter and shaping chamfer sword. Therefore, the tool changing time and the product rejection rate can be directly reduced, and the consistency precision of precision workpiece machining can be met. Meanwhile, the production efficiency can be greatly improved, and the debugging cost is reduced.

Description

Combined hole drill

Technical Field

The application relates to a combined drilling tool, in particular to a combined hole drill.

Background

In the machining process, annular grooves are required to be machined on partial parts, the annular grooves are formed by large circle size, small circle size and depth size, chamfering or rounding processing is required on the small circles, such as automobile part products and missile launching nozzles, requirements for the accuracy of the annular grooves and the small circle chamfering are high, and size and consistency are required to be guaranteed.

At present, when the parts are machined, two types of tools are generally selected for machining, generally, the annular groove is machined respectively, chamfering or arc machining is carried out, two times of machining are carried out, time for replacing the tool and adjusting and correcting is additionally generated, the consistency of the sizes of the front machining process and the rear machining process cannot be guaranteed, and the efficiency is low.

If some parts have holes, the annular groove is arranged at the bottom of the part hole, the difference between a large circle and a small circle of the annular groove is small, and the chamfer or the fillet at the small circle of the annular groove cannot be deeply processed in the inner cavity of the workpiece by a cutter, so that the problem difficult to solve exists.

Therefore, the combined hole drill has the advantages of being reasonable in design, simple in structure, convenient to use and capable of effectively improving production efficiency aiming at the problems existing in the machining.

Disclosure of Invention

The combined hole drill is reasonable in structure, high in production efficiency and high in drill bit utilization rate.

In order to achieve the purpose, the technical scheme adopted by the application is as follows:

the utility model provides a combined type hole drill, its characterized in that, includes annular grooving cutter 1, shaping chamfer sword 2 and locking screw 3, the base member of annular grooving cutter 1 sets up to the axial and link up, and the inboard axial direction of its base member is equipped with keyway 13, the base member of shaping chamfer sword 2 sets up to the entity to in the base member of embedding annular grooving cutter 1, its axial direction is equipped with the cooling hole 22 that the symmetry just link up, and the embedded installation of chamfer blade 21 axial is on the base member, and the size of the radial direction of base member is higher than at its chamfer blade 21's the back, cooperates with the keyway 13 of annular grooving cutter 1, with locking screw 3 fixed annular grooving cutter 1 and shaping chamfer sword 2.

Further, the method can be used for preparing a novel materialThe combination hole drill as claimed in claim 1, wherein the annular slot cutter 1 is provided with a plurality of slot cutter blades 11 and a number of chip flutes 12 equal to the number of the slot cutter blades 11, and the inclined surfaces of the chip flutes 12 and the central axis of the annular slot cutter 1 form 40-50% of the inclined surfaces^oAnd (4) an included angle.

Furthermore, two or more through screw holes 14 are arranged on the base body of the annular groove cutter 1 at the positions of the key grooves 13.

Furthermore, the matrix of the molding chamfer cutter (2) is set to be step size, and the size of one end close to the chamfer cutter blade (21) is larger than that of the other end.

Furthermore, the edge surface (211) of the chamfering blade (21) is embedded into one side line of the base body and is superposed with the central line of the base body, and the cutting edge (212) of the chamfering blade (21) is arranged to be in right-angle transition or circular arc transition.

Furthermore, the molding chamfer cutter 2 can be adjusted in size towards the direction of a cutter head in the base body of the annular groove cutter 1.

Further, the cooling hole 22 of the molding chamfer cutter 2 is connected with a cooling liquid for cooling in a machining state.

Further, the molding chamfer cutter 2 and the annular groove cutter 1 can be selected and combined according to the process requirements of the machined part.

Further, the slot cutter blade 11 and the chamfering blade 21 are both made of hard alloy, the slot cutter blade 11 and the cutter groove are welded into a whole, and the chamfering blade 21 is installed and welded on the base body in an embedded mode.

Description of the drawings:

FIG. 1 is a schematic view of the annular slot cutter of the present application.

FIG. 2 is a schematic view of a tool bit portion of the present application

FIG. 3 is a rotated cross-sectional view taken at FIG. 1A-A of the present application.

Fig. 4 is a rotated cross-sectional view at fig. 2B-B of the present application.

Fig. 5 is a schematic view of a forming chamfer cutter and a right-angle transition blade according to an embodiment of the invention.

Fig. 6 is a schematic view of a forming chamfer cutter and a circular arc transition blade according to an embodiment of the invention.

Description of the labeling:

1-annular groove cutter, 11-groove cutter blade, 12-chip groove, 13-key groove and 14-screw hole.

2-molding the chamfer cutter, 21-chamfering the blade, 211-the blade face, 212-the cutting edge and 22-the cooling hole.

And 3, locking the screw.

The specific implementation mode is as follows:

technical features, technical effects and advantages included in the technical solution of the present application are described in detail below with reference to the accompanying drawings.

Referring to the attached drawings 1-6, the combined hole drill comprises an annular groove cutter 1, a forming chamfer cutter 2 and a locking screw 3, wherein a base body of the annular groove cutter 1 is axially communicated, a key groove 13 is formed in the axial direction of the inner side of the base body, the base body of the forming chamfer cutter 2 is arranged into an entity and is embedded into the base body of the annular groove cutter 1, symmetrical and communicated cooling holes 22 are formed in the axial direction of the base body, a chamfer blade 21 is axially embedded on the base body, the size of the back surface of the chamfer blade 21 is larger than that of the radial direction of the base body and is matched with the key groove 13 of the annular groove cutter 1, and the annular groove cutter 1 and the forming chamfer cutter 2 are fixed through the locking screw 3.

The annular slotting tool 1 in fig. 1 has a cylindrical base body, a key groove 13 is formed in the inner side of the base body, the key groove penetrates through the whole base body and is in clearance fit with the back face of a chamfering blade 21, and a screw hole 14 is formed into a counter bore.

In fig. 2, a cooling hole 22 provided in the molding chamfer 2 is filled with a coolant during machining to cool a cutting body.

The back side of the chamfer insert 21 of fig. 5 or 6 is inserted into the base of the annular chamfer insert 1 along the keyway 13 of fig. 1, and extends to the step of the formed chamfer insert 2.

Subsequently, the locking screw 3 is screwed into the screw hole 14 on the base body of the annular slotting tool 1 to prevent the forming chamfer tool 2 from axial displacement or radial rotation displacement during machining.

The depth of the molding chamfer cutter 2 in the base body of the annular groove cutter 1 can be adjusted to determine the chamfer radian of the workpiece, and the chamfer shape of the workpiece can be changed by replacing the molding chamfer cutters 2 with cutting edges 212 of different shapes.

The foregoing is considered as illustrative only of the preferred embodiments of the invention, and is presented by way of illustration and not of limitation. Those skilled in the art will appreciate that changes, modifications and substitutions can be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

Claims

1. The utility model provides a combined type hole drill, its characterized in that, including annular grooving cutter (1), shaping chamfer sword (2) and locking screw (3), the base member of annular grooving cutter (1) sets up to the axial and link up, and the inboard axial direction of its base member is equipped with keyway (13), the base member of shaping chamfer sword (2) sets up to the entity to in the base member of embedding annular grooving cutter (1), its axial direction is equipped with symmetry and the cooling hole (22) that link up, and chamfer blade (21) axial embedded type installs on the base member, and the back of its chamfer blade (21) exceeds the size of base member radial direction, cooperates with keyway (13) of annular grooving cutter (1), with locking screw (3) fixed annular grooving cutter (1) and shaping chamfer sword (2).

2. A combined hole drill according to claim 1, characterized in that the annular groove cutter (1) is provided with a plurality of groove cutter blades (11) and with the same number of chip flutes (12) as the groove cutter blades (11), and the slope of the chip flutes (12) and the central axis of the annular groove cutter (1) form 40-50% of the slope of the central axis of the annular groove cutter (1)^oAnd (4) an included angle.

3. The combined type hole drill according to claim 1, characterized in that two or more through screw holes (14) are formed on the base body of the annular groove cutter (1) at the position of the key groove (13).

4. The combination drill according to claim 1, wherein the base body of the formed chamfer cutter (2) is provided with a stepped dimension, one end adjacent to the chamfer cutter (21) being larger than the other end.

5. The combination hole drill as claimed in claim 1, characterized in that a side line of the edge face (211) of the chamfer insert (21) embedded in the base coincides with the center line of the base, and the cutting edge (212) of the chamfer insert (21) is arranged in a right angle transition or an arc transition.

6. The combined type hole drill according to the claim 1 is characterized in that the forming chamfer cutter (2) is adjustable in size towards the cutter head in the base body of the annular groove cutter (1).

7. The combined type hole drill according to claim 1, characterized in that the cooling hole (22) of the forming chamfer cutter (2) is connected with a cooling liquid for cooling in a machining state.

8. The combined type hole drill according to claim 1, characterized in that the forming chamfer cutter (2) and the annular groove cutter (1) can be selectively combined according to the process requirements of a workpiece.

9. The combined type hole drill as claimed in claim 1, wherein the slot insert (11) and the chamfer insert (21) are made of hard alloy, the slot insert (11) and the cutter groove are welded into a whole, and the chamfer insert (21) is installed and welded on the base body in an embedded manner.