CN210475567U - Inner hole groove machining blade, cutter bar and cutter - Google Patents

Abstract

The utility model discloses a hole groove processing blade, cutter arbor and cutter relates to the machining cutter field, provides a hole groove processing blade, cutter arbor and cutter suitable for processing small-size hole. The blade includes blade main part and cutting portion, has the installation unthreaded hole coaxial with the blade main part in the blade main part, and the one end of blade main part is provided with blade connection structure, and blade connection structure includes at least three protruding muscle of connecting, connects protruding muscle along the radial setting of blade main part, and each connects protruding muscle and uses the installation unthreaded hole as central circumference equipartition. The front end of cutter arbor is provided with installation screw hole and cutter arbor connection structure, and the installation screw hole is coaxial with hole groove processing cutter arbor, and cutter arbor connection structure includes at least three connecting groove, and connecting groove radially sets up along hole groove processing cutter arbor, and each connecting groove uses installation screw hole as central circumference equipartition, and connecting groove is the same with connection protruding muscle quantity and shape size looks adaptation. And connecting the cutter bar with the blade to obtain the inner hole groove processing cutter.

Description

Inner hole groove machining blade, cutter bar and cutter

Technical Field

The utility model relates to a machine tooling cutter field especially relates to an inner hole groove processing blade, cutter arbor and cutter.

Background

The inner hole groove machining tool is a tool which enters a hole and machines a groove on the wall of the hole.

The existing inner hole groove processing cutter has various types, the main structural form is as shown in figure 1, a blade is flatly arranged on a cutter rod, and the blade is directly pressed by a fastening piece. And as shown in figures 2 and 3, the insert is mounted vertically in a slot in the end of the shank and the fastener is pressed against the shank to cause the slot in the shank to retract to grip the insert. The cutting stress of the blades in the two modes is almost completely transmitted to the fastener, the fastener is stressed greatly, the strength can be ensured only by the fact that the size of the fastener is large, and the fastener is stressed greatly and is easy to loosen. Because the fastener size is great, not only occupy the cutter arbor space greatly, the weakening of fastener hole to the cutter arbor is also big for the corresponding size of cutter arbor is also great, consequently above-mentioned inner hole groove processing cutter is difficult to get into the less hole of size, thereby can't process the inner hole groove of small-size hole.

The inner bore groove for machining the small-sized inner bore is usually made of an integral tool, i.e., a cutting edge is directly ground on a tool bar, such as the inner bore groove tool disclosed in chinese patent No. 201110167690.6. The cutting edge of the cutter cannot be replaced after being worn, and only regrinding is carried out, so that the cutter is inconvenient.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: provides an inner hole groove processing blade suitable for processing small-size inner holes.

The technical scheme adopted for solving the problems is as follows: the inner hole groove processing blade comprises a blade main body and a cutting part, wherein the blade main body is provided with an installation unthreaded hole coaxial with the blade main body, one end of the blade main body is provided with a blade connecting structure, the blade connecting structure comprises at least three connecting convex ribs, the connecting convex ribs are radially arranged along the blade main body, and the connecting convex ribs are uniformly distributed by taking the installation unthreaded hole as a center circumference.

Further, the method comprises the following steps: the cross section of the connecting convex rib is in a trapezoid shape with a narrow outer part and a wide inner part.

Further, the method comprises the following steps: the included angle of the two side surfaces of the connecting convex rib is 29 degrees.

Further, the method comprises the following steps: the number of the connecting convex ribs is three.

The utility model discloses another technical problem who solves is: provides an inner hole groove processing cutter bar suitable for processing small-size inner holes.

The technical scheme adopted for solving the problems is as follows: the front end of hole groove processing cutter arbor is provided with mounting screw hole and cutter arbor connection structure, and mounting screw hole is coaxial with hole groove processing cutter arbor, and cutter arbor connection structure includes at least three connecting groove, and connecting groove radially sets up along hole groove processing cutter arbor, and each connecting groove uses mounting screw hole as central circumference equipartition, and connecting groove is the same and the shape size looks adaptation with connection protruding muscle quantity.

Further, the method comprises the following steps: the inner hole groove machining cutter bar comprises a cutter bar main body made of tungsten steel and a cutter bar head made of easily-machined steel, the cutter bar head is welded with the cutter bar main body, and the installation threaded hole and the cutter bar connecting structure are arranged on the cutter bar head.

The utility model discloses another technical problem who solves is: provides an inner hole groove processing cutter suitable for processing small-size inner holes.

The technical scheme adopted for solving the problems is as follows: the inner hole groove machining cutter comprises a blade and a cutter bar which are connected, the blade is used for machining the inner hole groove, the cutter bar is used for machining the inner hole groove, the blade main body and the cutter bar are coaxially arranged, the connecting convex rib is embedded into the connecting groove, the fastener penetrates through the mounting unthreaded hole and is connected with the mounting threaded hole, and the blade is tightly pressed on the cutter bar by the fastener.

The utility model has the advantages that: the utility model provides an during operation of hole groove processing cutter, the blade atress is given the wall of connecting the recess by connecting protruding muscle to the transmission gives the cutter arbor. The fastener only bears the axial component of the force given to the connecting ribs by the wall surfaces of the connecting grooves, and the component is small because the inclination angle of the wall surfaces of the connecting grooves is small, so that the fastener can be small. The small fastener not only occupies small space of the cutter bar but also has small weakening to the cutter bar, so that the cutter bar can be thinner, thereby being capable of entering a small inner hole and processing an inner hole groove of a small-diameter inner hole.

Description of the drawings:

FIG. 1 is a schematic diagram of a conventional inner hole groove machining tool;

FIG. 2 is a schematic diagram of another prior art internal bore groove machining tool;

FIG. 3 is an end view of the inner bore groove machining tool of FIG. 2;

FIG. 4 is a front view of the female slot machining insert of the present application;

FIG. 5 is a right side view of the inner bore groove milling insert of the present application;

FIG. 6 is a left side view of the inner bore groove milling insert of the present application;

FIG. 7 is a front view of the inner bore groove machining tool bar of the present application;

FIG. 8 is a left side view of the inner bore groove machining tool bar of the present application;

FIG. 9 is a block diagram of the inner bore groove machining tool of the present application;

labeled as: the cutter comprises a blade 1, a blade main body 11, a cutting part 12, an installation unthreaded hole 13, a connecting convex rib 14, a cutter rod 2, a cutter rod main body 21, a cutter rod head 22, a connecting groove 23 and an installation threaded hole 24.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

As shown in fig. 9, the inner bore grooving tool comprises a cutting insert 1 and a tool shank 2 which are connected.

Wherein the blade 1 is as shown in fig. 4 to 6: the inner hole groove processing blade comprises a blade main body 11 and a cutting part 12, wherein the blade main body 11 is provided with a mounting unthreaded hole 13 coaxial with the blade main body 11, one end of the blade main body 11 is provided with a blade connecting structure, the blade connecting structure comprises at least three connecting convex ribs 14, the connecting convex ribs 14 are radially arranged along the blade main body 11, and the connecting convex ribs 14 are uniformly distributed by taking the mounting unthreaded hole 13 as a central circumference.

The tool holder 2 is shown in fig. 7 and 8: the front end of hole groove processing cutter arbor is provided with installation screw hole 24 and cutter arbor connection structure, and installation screw hole 24 is coaxial with the hole groove processing cutter arbor, and cutter arbor connection structure includes at least three connecting groove 23, and connecting groove 23 radially sets up along the hole groove processing cutter arbor, and each connecting groove 23 uses installation screw hole 24 as central circumference equipartition, and connecting groove 23 is the same and the shape size looks adaptation with connecting protruding muscle 14 quantity.

When the blade 1 is connected with the cutter bar 2, the blade body 11 and the cutter bar 2 are coaxially arranged, the connecting convex rib 14 is embedded into the connecting groove 23, the fastener penetrates through the mounting unthreaded hole 13 and is connected with the mounting threaded hole 24, and the blade 1 is tightly pressed on the cutter bar 2 by the fastener.

The coupling bead 14 is inserted into the coupling groove 23, and first, serves to transmit torque. Secondly, the centering and the radial movement prevention of the blade 1 can be realized, namely the blade body 11 and the cutter bar 2 are ensured to be coaxial; this effect is not obtained when only one or two of the coupling beads 14 and the coupling grooves 23 are provided, and thus more than three coupling beads 14 are required to be fitted into the coupling grooves 23. The fastener serves to prevent the insert 1 from moving axially outward, and the fastener receives only the axial component of the force given to the coupling bead 14 by the wall surface of the coupling groove 23, which component is small because the inclination of the wall surface of the coupling groove is small, so that the fastener can be small.

If the cross-sectional shapes of the connecting ribs 14 and the connecting grooves 23 are rectangular, there is an error due to the inevitable processing, and a small gap is inevitably left between the connecting ribs 14 and the connecting grooves 23, which causes the blade 1 to slightly shake. To avoid this, the cross-sectional shapes of the coupling bead 14 and the coupling groove 23 are preferably trapezoidal. The tight pressing force makes the connecting convex rib 14 contact with the wall surface of the connecting groove 23, so that the clearance is eliminated, and the blade 1 can be prevented from shaking.

The angle between the two sides of the connecting rib 14 and the connecting groove 23 is an important parameter. If the included angle is too large, the axial component of the force applied by the wall surface of the connecting groove 23 to the connecting rib 14 is too large, resulting in too large a force applied to the fastener. If the included angle is too small, it is not favorable for the connecting rib 14 to contact with the wall surface of the connecting groove 23. The applicant determined, after trial and error, that the included angle between the two side faces of the connecting bead 14 was 29 °.

The excessive number of the connecting ribs 14 increases the processing difficulty, and has no other beneficial effects, so that the number of the connecting ribs 14 is preferably three which is the lowest.

The cutter arbor 2 can adopt common cutter arbor to make with just material, nevertheless because this application is mainly applicable to the processing of the hole groove of minor diameter hole, cutter arbor 2 is very thin, adopts 2 rigidity of conventional material cutter arbor to be difficult to guarantee, shakes greatly when cutter arbor 2 uses. In order to avoid the situation, the internal hole groove machining cutter bar preferably comprises a cutter bar main body 21 made of tungsten steel and a cutter bar head 22 made of workable steel, the cutter bar head 22 is welded with the cutter bar main body 21, and the installation threaded hole 24 and the cutter bar connecting structure are both arranged on the cutter bar head 22. The tungsten steel material has extremely high strength and rigidity, and can avoid bending and vibration of the slender cutter bar 2. However, it is difficult to machine the connecting groove 23 and the mounting threaded hole 24 from tungsten steel, so a short section of the shank head 22 is welded to the shank body 21 to machine the connecting groove 23 and the mounting threaded hole 24. Due to the short length of the shank head 22, the rigidity and shock resistance of the shank 2 are not significantly impaired. The easily machined steel material refers to a conventional steel material which is convenient for machining the connecting groove 23 and the mounting threaded hole 24, such as common No. 45 steel and the like.

Claims (7)

1. Interior hole groove processing blade, including blade main part (11) and cutting portion (12), have on blade main part (11) with coaxial installation unthreaded hole (13) of blade main part (11), its characterized in that: one end of the blade main body (11) is provided with a blade connecting structure, the blade connecting structure comprises at least three connecting convex ribs (14), the connecting convex ribs (14) are radially arranged along the blade main body (11), and the connecting convex ribs (14) are uniformly distributed by taking the mounting unthreaded hole (13) as the center circumference.

2. The inner bore groove machining insert according to claim 1, wherein: the cross section of the connecting convex rib (14) is in a trapezoid shape with a narrow outer part and a wide inner part.

3. The inner bore groove machining insert according to claim 2, wherein: the included angle of the two side surfaces of the connecting convex rib (14) is 29 degrees.

4. The inner bore groove machining insert according to claim 1, wherein: the number of the connecting convex ribs (14) is three.

5. Interior hole groove processing cutter arbor, its characterized in that: the front end of hole groove processing cutter arbor is provided with installation screw hole (24) and cutter arbor connection structure, and installation screw hole (24) are coaxial with hole groove processing cutter arbor, and cutter arbor connection structure includes at least three connecting groove (23), and connecting groove (23) radially set up along hole groove processing cutter arbor, and each connecting groove (23) use installation screw hole (24) as central circumference equipartition, and connecting groove (23) are the same and shape size looks adaptation with connecting protruding muscle (14) quantity.

6. The inner bore groove machining tool bar as claimed in claim 5, wherein: the tungsten steel cutter bar head part welding device comprises a cutter bar main body (21) made of tungsten steel and a cutter bar head part (22) made of easily-processed steel, wherein the cutter bar head part (22) is welded with the cutter bar main body (21), and a mounting threaded hole (24) and a cutter bar connecting structure are arranged on the cutter bar head part (22).

7. Interior hole groove processing cutter, including blade (1) and cutter arbor (2) that are connected, its characterized in that: the insert (1) is the inner hole groove machining insert as claimed in any one of claims 1 to 4, the cutter bar (2) is the inner hole groove machining cutter bar as claimed in claim 5 or 6, the insert body (11) and the cutter bar (2) are coaxially arranged, the connecting convex rib (14) is embedded into the connecting groove (23), the fastener penetrates through the mounting unthreaded hole (13) and is connected with the mounting threaded hole (24), and the fastener presses the insert (1) on the cutter bar (2).

Images