CN209754045U - Chamfering efficient sleeve type boring cutter bar - Google Patents

Abstract

The utility model provides a high-efficient shell-type boring cutter bar capable of chamfering, which comprises a cutter handle, a cutter head, arc notches, a second boring blade, a chamfering blade and a cutting fluid passage, wherein the cutter head is installed at the front end of the cutter handle, the cutter head is a cylinder and is provided with two symmetrical transverse planes in parallel with the cutter head, the cutter head is provided with two arc notches, the center of the front part of the cutter head is provided with a trepanning, the trepanning is cylindrical, the diameter of the trepanning is larger than that of a workpiece excircle blank, a workpiece can penetrate into the trepanning, the end surface of the cutter head at the front part of the cutter head is a plane, a first boring blade and a second boring blade are arranged at the plane close to the arc notches at the end surface of the cutter head, the first boring blade and the second boring blade are symmetrically arranged, and a slender cutting fluid passage is arranged in a guide rod and, the cutter head is stressed uniformly, and the service life is long; the scrap of the workpiece can be washed from the inside, and the precision is higher.

Description

A high-efficiency sleeve-type boring bar that can be chamfered

technical field

The utility model belongs to the field of metal cutting tools, in particular to a high-efficiency sleeve-type boring bar that can be chamfered.

Background technique

The boring tool is a kind of boring tool. The boring bar used in the machining center, such as ordinary milling cutter, can process high-precision inner holes and end faces. A sleeve-type boring bar previously developed by the company has strong high-speed rotation stability and high processing efficiency, but there are some problems in the use of this sleeve-type boring bar:

1. The chamfering tool needs to be replaced

After cylindrical boring, most of them need to be deburred and chamfered. Only one blade is provided, which can only complete the cylindrical cutting in the workpiece. The outer circle and chamfering of the workpiece need to be processed separately by two tools, so in the process of processing the workpiece with the sleeve boring tool, the tool needs to be replaced, which not only reduces the processing efficiency, but also easily leads to unstable processing accuracy;

2. Untimely cutting will cause scratches and black spots on the surface of the workpiece

Since the sleeve type boring tool places the workpiece in the surrounding sleeve, when high-speed cutting and a large amount of cutting are used, the waste chips removed from the workpiece are easy to stay, and the extrusion with the boring blade and the sleeve will cause scratches on the surface of the workpiece and high-speed rotation. It will cause burning, resulting in black spots on the surface of the workpiece;

3. For stability, the sleeve type boring bar is heavy

The power of the machining center is required, and the energy consumption is relatively large.

Utility model content

In view of the above-mentioned deficiencies in the prior art, the technical problems to be solved by the present invention are that the existing sleeve-type boring bars cannot process chamfers at the same time, the chip evacuation is not smooth, and the heavy weight affects energy saving.

In order to solve the above technical problems, the utility model provides a chamfered high-efficiency sleeve-type boring bar, which includes a tool handle, a tool head, an arc-shaped notch, and also includes a second boring blade, a chamfering blade, and a cutting fluid passage.

A cutter head is installed at the front end of the handle, the cutter head is a cylinder, and two symmetrical transverse planes are arranged parallel to the cutter head, and two arc-shaped notches are arranged on the cutter head, and the arc-shaped notches include The plane of the blade mounting seat is provided, and the plane of the arc-shaped notch is parallel to the axial direction of the shank,

The center of the front part of the cutter head is provided with a sleeve hole, the sleeve hole is cylindrical, and the diameter is larger than the outer circle blank of the workpiece, and the workpiece can penetrate into the sleeve hole,

The end face of the cutter head at the front of the cutter head is a plane, and the plane close to the arc-shaped notch at the end face of the cutter head is provided with a first boring blade, the second boring blade, and the first boring blade and the second boring blade. The boring inserts are arranged symmetrically, and the tool tip distance is the same as the external cutting diameter.

Further, the guide rod and the cutter head are provided with a slender cutting fluid passage, one end of the cutting fluid passage is located in the center of the end face of the guide rod, and communicates with the cutting fluid pipeline on the main shaft of the machining center, and the other end passes through. the hole center of the cutter head.

Further, the handle is provided with a screw fastening surface, the screw fastening surface is an elongated plane, and the bolts are fixed on the screw fastening surface through the main shaft connecting part.

Further, in order to improve the machining accuracy, the first boring insert, the second boring insert, and the chamfering insert are diamond-shaped inserts, and the first boring insert and the second boring insert extend beyond the end face of the cutter head by the outer side, and parallel to the end face of the cutter head.

Further, the first boring insert, the second boring insert, and the chamfering insert are detachably mounted on the cutter head through an M5 nut, and the cutting tips of the first boring insert and the second boring insert are rounded corners. , the cutting edge of the chamfering insert is 45 degrees from the axis of the guide rod.

Further, the models of the first boring insert, the second boring insert and the chamfer insert are CCMT120408.

Further, in order to improve the strength of the tool and increase the service life, the guide rod and the tool head are quenched, tempered and nitrided.

Further, the distance between the two transverse planes is 60%-75% of the diameter of the cutter head.

The beneficial effects of the present utility model are:

1. The utility model can complete the cylindrical boring and chamfering of the workpiece at one time, with high precision.

2. Two symmetrical boring inserts are used to cut the outer circle of the workpiece, which has a longer service life and avoids deformation caused by uneven force on the tool head;

3. There is a cutting fluid passage through the tool holder and the tool head, which can flush the waste chips of the workpiece from the inside;

4. The screw fastening surface is set on the handle, and the guide rod is more stable;

5. The unnecessary positions on the cutter head are reduced in weight through the lateral plane, and the energy consumption is less.

Description of drawings

Fig. 1 is a schematic diagram of a workpiece to be solved by the utility model;

Figure 2 shows the company's previous scheme of chamferable high-efficiency sleeve boring bar;

3 is a front view of the chamfered high-efficiency sleeve-type boring bar according to the utility model;

Figure 4 is a left side view of the flange positioning plate assembled with the automobile coupling axle shaft.

In the picture: 1 arc-shaped notch, 2 cutter head, 3 first boring blade, 4 cutter head end face, 5 tool holder, 6 sets of holes, 7 workpiece outer circle, 8 workpiece chamfer, 9 second boring blade, 10 workpiece , 11 screw fastening surface, 12 cutting fluid passages, 13 transverse planes, 14 chamfering inserts.

Detailed ways

The specific content of the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in Figures 3 and 4, a high-efficiency sleeve-type boring bar that can be chamfered includes a tool handle 5, a tool head 2, an arc-shaped notch 1, a second boring blade 9, a chamfering blade 14, and a cutting fluid passage. 12,

The front end of the handle 5 is provided with a cutter head 2, the cutter head 2 is a cylinder, and two symmetrical transverse planes 13 are arranged parallel to the cutter head 2, and two arc-shaped notches 1 are provided on the cutter head 2. , the arc-shaped gap 1 includes a plane provided with a blade mounting seat, and the plane of the arc-shaped gap 1 is axially parallel to the tool handle 5,

The center of the front part of the cutter head 2 is provided with a sleeve hole 6, the sleeve hole 6 is cylindrical, and the diameter is larger than the blank 7 of the workpiece outer circle, and the workpiece 10 can penetrate into the sleeve hole 6,

The cutter head end face 4 at the front of the cutter head 2 is a plane, and the plane close to the arc-shaped gap 1 at the cutter head end face 4 is provided with the first boring blade 3, the second boring blade 9, and the first boring blade 9. The first boring insert 3 and the second boring insert 9 are arranged symmetrically, and the distance between the tool tips is the same as the outer circle cutting diameter.

In practical applications, the guide rod and the cutter head 2 are provided with an elongated cutting fluid passage 12, one end of the cutting fluid passage 12 is located at the center of the end face of the guide rod, and is connected to the cutting fluid pipeline on the main shaft of the machining center. connected, and the other end penetrates through the center of the sleeve hole 6 of the cutter head 2 .

In practical application, the handle 5 is provided with a screw fastening surface 11 , the screw fastening surface 11 is a slender plane, and the bolts are fixed on the screw fastening surface 11 through the main shaft connecting member.

In practical applications, in order to improve the machining accuracy, the first boring insert 3, the second boring insert 9, and the chamfering insert 14 are diamond-shaped inserts, and the first boring insert 3 and the second boring insert 9 are beyond the outer edge. The end face 4 of the cutter head is parallel to the end face 4 of the cutter head.

In practical applications, the first boring insert 3 , the second boring insert 9 and the chamfering insert 14 are detachably mounted on the cutter head 2 through M5 nuts, the first boring insert 3 , the second boring insert 14 The cutting tip of 9 is rounded, and the cutting edge of the chamfering insert 14 is at 45 degrees to the axis of the guide rod.

In practical applications, the models of the first boring insert 3, the second boring insert 9, and the chamfering insert 14 are CCMT120408.

In practical applications, in order to improve the strength of the tool and increase the service life, the guide rod and the tool head 2 are quenched, tempered and nitrided.

In practical applications, the distance between the two transverse planes 13 is 60%-75% of the diameter of the cutter head 2 .

To sum up, the utility model can complete the cylindrical boring and chamfering of the workpiece at one time, the cutter head is uniformly stressed, and has a long service life; the waste chips of the workpiece can be washed from the inside, and the precision is high.

The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the above-mentioned embodiments are only intended to illustrate the technical concept and characteristics of the present utility model, and the purpose thereof is to enable persons familiar with this technology to understand the contents of the present utility model and implement them, and not to limit the present utility model by this. In the protection scope of the utility model, all equivalent changes or modifications made according to the spirit of the present utility model shall be covered within the protection scope of the present utility model.

Claims (8)

1. The utility model provides a but high-efficient shell type boring cutter pole of chamfer, includes handle of a knife (5), tool bit (2), arc breach (1), its characterized in that: also comprises a second boring blade (9), a chamfering blade (14) and a cutting fluid passage (12),

The front end of the knife handle (5) is provided with a knife head (2), the knife head (2) is a cylinder, two symmetrical transverse planes (13) are arranged in parallel with the knife head (2), two arc-shaped notches (1) are arranged on the knife head (2), the arc-shaped notches (1) comprise planes provided with blade mounting seats, the planes of the arc-shaped notches (1) are axially parallel to the knife handle (5),

a trepanning (6) is arranged at the center of the front part of the tool bit (2), the trepanning (6) is cylindrical, the diameter of the trepanning (6) is larger than that of a work piece excircle (7) blank, a work piece (10) can go deep into the trepanning (6),

the front end face (4) of the cutter head (2) is a plane and close to the plane of the arc-shaped notch (1) at the end face (4) of the cutter head, a first boring blade (3) and a second boring blade (9) are symmetrically arranged, and the distance between the cutter points is the same as the cutting diameter of an excircle.

2. The efficient sleeve type boring cutter bar capable of chamfering according to claim 1, characterized in that: slender cutting fluid passages (12) are arranged in the guide rod and the cutter head (2), one end of each cutting fluid passage (12) is located in the center of the end face of the tail end of the guide rod and communicated with a cutting fluid pipeline on a main shaft of the machining center, and the other end of each cutting fluid passage is communicated with the center of a sleeve hole (6) of the cutter head (2).

3. the efficient sleeve type boring cutter bar capable of chamfering according to claim 2, characterized in that: the screwdriver handle (5) is provided with a screw fastening surface (11), the screw fastening surface (11) is a long and thin plane, and a bolt penetrates through a main shaft connecting part and is fixed on the screw fastening surface (11).

4. The efficient sleeve type boring cutter bar capable of chamfering according to claim 3, characterized in that: in order to improve the machining precision, the first boring blade (3), the second boring blade (9) and the chamfering blade (14) are rhombic blades, and the outer sides of the first boring blade (3) and the second boring blade (9) exceed the cutter head end face (4) and are parallel to the cutter head end face (4).

5. the efficient sleeve type boring cutter bar capable of chamfering according to claim 4, characterized in that: first boring blade (3), second boring blade (9), chamfer blade (14) pass through M5 nut detachably and install on tool bit (2), the cutting knife tip of first boring blade (3), second boring blade (9) is the fillet, the cutting edge of chamfer blade (14) with the guide bar axis is 45 degrees.

6. The efficient sleeve type boring cutter bar capable of chamfering according to claim 5, characterized in that: the first boring blade (3), the second boring blade (9) and the chamfering blade (14) are CCMT120408 in type.

7. The efficient sleeve type boring cutter bar capable of chamfering according to claim 6, characterized in that: in order to improve the strength of the cutter and prolong the service life, the guide rod and the cutter head (2) are subjected to quenching and tempering and nitriding.

8. The efficient sleeve type boring cutter bar capable of chamfering according to any one of claims 1 to 7, wherein: the distance between the two transverse planes (13) is 60% -75% of the diameter of the cutter head (2).