CN204657565U - Interchangeable cutter bit type drill bit - Google Patents

Abstract

The utility model relates to a drill bit with a replaceable cutter head. Also do not have a kind of machining accuracy height at present, and installation accuracy is high, and cutting is stable, and the replaceable cutter head type drill bit that cutter head can abandon. The utility model includes a cutter bar, a cutter head, a No. 1 screw and a No. 2 screw. The cutter bar includes a cutter bar body. It is characterized in that: one end of the cutter bar body is provided with a No. There is a No. 1 support plane and No. 1 fixing screw hole, the axis of the No. 1 fixing screw hole is perpendicular to the No. 1 support plane, and the bottom of the blade groove is provided with a positioning hole; the two sides of the cutter head body are provided with a No. 1 support surface and a No. 2 support plane. No. 1 support surface, the No. 1 support surface and No. 2 support surface are both plane structures, the positioning column is located in the positioning hole, the cutter head body is located in the blade groove, the No. 1 support surface is close to the No. 1 support surface, and the No. 2 support surface is tight. Paste the No. 2 support plane. The utility model has high processing precision, high installation precision, stable rotation and stable cutting, the cutter head can be discarded, and the service life is long.

Description

replaceable head drill

technical field

The utility model relates to a drill bit, in particular to a drill bit with a replaceable cutter head, which is mainly used in hole processing tools in the machining industry, and belongs to a metal processing tool.

Background technique

The specifications of the cemented carbide twist drills commonly used in the existing market are relatively small, and the large-scale cemented carbide twist drills are constantly being developed. Because the existing cemented carbide twist drills usually adopt a monolithic structure, that is, The tool holder and the cutter head are not detachable, and the connection between the cutter holder and the cutter head is fixed by welding, which leads to high production cost and low resource utilization rate of the hard alloy twist drill. It is especially obvious in the above. In addition, it also makes the processing of cemented carbide twist drills difficult, complicated and has a short service life.

There are also some drill bits with replaceable cutter heads now, as disclosed on January 04, 2012, in the Chinese patent with the publication number CN102303152A, a twist drill with replaceable blades is disclosed, which includes a twist drill rod, There is a blade installation groove horizontally between the notches at the front ends of the two spiral chip removal grooves on the rod. The lower half of the blade installation groove is a V-shaped groove bottom with an enlarged angle. There is a locking hole, one side of the locking hole is a countersunk screw hole, the other side is a light hole, a blade is fully fitted in the blade installation groove, the upper end of the blade is a rotary cutting blade, and the lower part of the blade is a The matching positioning body at the bottom of the V-shaped groove is provided with a through hole at the corresponding position of the locking hole on the positioning body, and a countersunk screw that goes deep into the blade through hole and the light hole on the other side is installed in the locking hole. Another example is that the publication date is August 23, 2006, and the publication number is CN2808378 in the Chinese patent, which discloses a replaceable cemented carbide drill bit, which includes a drill body, a blade and a fixed part for fastening the blade, and the two sides of the blade are misaligned. Trapezoidal, with a positioning pin at the center of the bottom of the blade, and a positioning hole on the drill pipe body; the positioning pin is integrated with the blade and matched with the positioning hole for the positioning of the blade on the drill pipe body; There is a fixing hole, and the fixing part for fastening the blade is connected with these two fixing holes. A circular positioning pin is provided at the center of the bottom of the blade, and a screw hole is opened on both sides of the blade symmetrically to the center, so that the drill bit Assembly is easier. The machining accuracy of these existing drill bits with replaceable cutter heads is not high, the installation accuracy is not high, the rotation is not stable enough, and the cutting is not stable enough.

To sum up, at present there is no replaceable cutter head drill that satisfies reasonable structural design, high machining accuracy, high installation accuracy, stable rotation, stable cutting, disposable cutter head and long service life.

Utility model content

The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art, and provide a replaceable tool with reasonable structure design, high processing precision, high installation precision, stable rotation, stable cutting, disposable cutter head and long service life. head drill.

The technical scheme adopted by the utility model to solve the above-mentioned problems is: the replaceable bit type drill includes a cutter bar, a cutter head, a No. 1 screw and a No. 2 screw, and the tool bar includes a tool bar body, and A flute is provided, and the cutter head includes a cutter head body and a positioning post, one end of the positioning post is fixed on one end of the cutter head body, and the other end of the cutter head body is provided with a drill tip, and the drill tip is With a main cutting edge and a grinding chisel edge, its structural features are: one end of the tool holder body is provided with a No. 1 boss and a No. 2 boss, and the No. 1 boss is provided with a No. Screw holes, the axis of the No. 1 fixing screw hole is perpendicular to the No. 1 support plane, the No. 2 boss is provided with the No. 2 support plane and the No. 2 fixing screw hole, and the axis of the No. 2 fixing screw hole and the No. 2 The No. 1 support plane is vertical, and a blade groove is formed between the No. 1 support plane and the No. 2 support plane. Positioning holes are arranged at the bottom of the blade groove; No. 1 support surface and No. 2 support are arranged on both sides of the cutter head body. The No. 1 support surface and the No. 2 support surface are both plane structures, and the No. 1 screw hole and the No. 2 screw hole are arranged in the cutter head body, and one end of the No. 1 screw hole is flush with the No. 1 support surface. One end of the No. 2 screw hole is flush with the No. 2 support surface, the positioning column is located in the positioning hole, the cutter head body is located in the blade groove, the No. 1 support surface is close to the No. 1 support plane, and the The No. 2 support surface is close to the No. 2 support plane, the No. 1 screw is threaded in the No. 1 screw hole and the No. 1 fixing screw hole, and the No. 2 screw is threaded in the No. 2 screw hole and the No. 2 fixing screw hole .

As a preference, an internal cooling passage is provided in the tool holder body of the present invention, the entrance of the internal cooling passage is located at the center of the rear end of the handle of the cutter holder body or on the outer circle of the handle, and the outlet of the internal cooling passage Located on the end face of the blade or in the flute near the head.

As a preference, the No. 1 support plane of the present invention overlaps with the No. 2 support plane after it rotates 180 degrees around the axis of the cutter head; the No. 1 support plane overlaps with the No. 2 support plane after it rotates 180 degrees around the cutter head axis.

As a preference, the No. 1 boss of the utility model overlaps with the No. 2 boss after rotating 180 degrees around the axis of the cutter bar.

As a preference, the No. 1 support plane and the No. 2 support plane described in the utility model are parallel, the No. 1 support plane and the No. 2 support plane are all parallel to the axis of the cutter bar, and the No. 1 support plane and the No. 2 support plane are both perpendicular to the bottom surface of the insert groove; the axis of the No. 1 screw hole is perpendicular to the No. 1 support surface, and the axis of the No. 2 screw hole is perpendicular to the No. 2 support surface.

As a preference, the grinding chisel edge of the utility model has an X-shaped structure, and the main cutting edge adopts a wave-shaped edge structure.

As a preference, the outer wall of the cutter head body of the present invention is provided with a negative cutting edge 25 and an outer circular back angle 210 .

As a preference, the number of chip removal grooves 12 in the present invention is two, and the chip removal grooves are of straight groove structure or spiral groove structure.

Preferably, the axis of the positioning hole of the utility model overlaps with the axis of the cutter bar.

Preferably, the No. 1 screw of the present invention is threaded in the No. 1 screw hole and the No. 1 fixing screw hole in turn, and the No. 2 screw is threaded in the No. 2 screw hole and the No. 2 fixing screw hole in turn.

Compared with the prior art, the utility model has the following advantages and effects: simple structure, reasonable design, stable rotation, stable cutting, the cutter head can be discarded, the cutter rod can be reused by replacing the cutter head, and the service life is long. The No. 1 support surface is close to the No. 1 support plane, and the No. 2 support plane is close to the No. 2 support plane, so that the tool rod can support and limit the cutter head. The machining accuracy is high, and the installation accuracy of the cutter head is high, ensuring that the cutter head Smooth turning and cutting.

The cutter bar of the utility model has a simple structure and a reasonable design. A blade groove is formed between the No. 1 support plane and the No. 2 support plane. The bottom of the blade groove is provided with a positioning hole. The No. 1 support plane plays a good role in supporting and limiting the cutter head, with high machining accuracy, stable rotation, convenient and firm clamping of the cutter head, disposable cutter head, long service life and smoother chip removal.

The cutter head of the utility model is simple in structure, reasonable in design, and unique in conception. The two sides of the cutter head body are provided with a No. 1 support surface and a No. 2 support surface, which have high machining accuracy and play a good supporting role for the cutter head. It is convenient and firm, and can transmit torque very well, so that the rotation of the cutter head is more stable, and the cutting is more stable, and it is conducive to improving the machining accuracy and installation accuracy, and improving the overall performance of the drill bit.

Description of drawings

Fig. 1 is a schematic diagram of the front structure of the replaceable bit drill in the embodiment of the utility model.

Fig. 2 is a schematic view of the right view of Fig. 1 .

FIG. 3 is a schematic top view of the structure in FIG. 1 .

Fig. 4 is a three-dimensional structure schematic diagram of the replaceable bit drill in the embodiment of the utility model.

Fig. 5 is a schematic diagram of the front view of the cutter bar in the embodiment of the utility model.

FIG. 6 is a schematic top view of the structure of FIG. 5 .

FIG. 7 is a schematic view of the right structure of FIG. 5 .

Fig. 8 is a schematic diagram of the three-dimensional structure of the cutter bar in the embodiment of the present invention.

Fig. 9 is a schematic diagram of the enlarged front view of the cutter head in the embodiment of the present invention.

FIG. 10 is a schematic diagram of the right view of FIG. 9 .

FIG. 11 is a schematic top view of the structure of FIG. 9 .

Fig. 12 is an enlarged perspective view of the three-dimensional structure of the cutter head in the embodiment of the present invention.

Detailed ways

The utility model will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the utility model and the utility model is not limited to the following examples.

Example.

Referring to Fig. 1 to Fig. 12, the replaceable bit type drill bit in this embodiment includes a cutter bar 1, a cutter head 2, a No. 1 screw 3 and a No. 2 screw 4, wherein the tool bar 1 in this embodiment includes a tool bar The main body 11 and the cutter body 11 are provided with chip removal grooves 12, the number of the chip removal grooves 12 is two, and the chip removal grooves 12 are straight groove structure or spiral groove structure.

One end of the tool bar body 11 in this embodiment is provided with a No. 1 boss 15 and a No. 2 boss 16, and the No. 1 boss 15 is provided with a No. 1 support plane 17 and a No. 1 fixing screw hole 19, and the No. 1 fixing screw hole 19 The axis is perpendicular to the No. 1 support plane 17, and the No. 2 boss 16 is provided with a No. 2 support plane 18 and a No. 2 fixing screw hole 110. The axis of the No. 2 fixing screw hole 110 is perpendicular to the No. 2 support plane 18.

In this embodiment, a blade groove 13 is formed between the No. 1 support plane 17 and the No. 2 support plane 18. The bottom of the blade groove 13 is provided with a positioning hole 14. The axis of the positioning hole 14 overlaps with the axis x of the cutter bar, which belongs to central positioning. The tool holder body 11 of this embodiment is provided with an inner cooling channel 111, the entrance of the inner cooling channel 111 is located at the center of the rear end of the handle of the tool holder body 11 or on the outer circle of the handle, and the outlet of the inner cooling channel 111 is located at The end face of the blade or the chip flute 12 is close to the cutter head.

The No. 1 support plane 17 and the No. 2 support plane 18 in this embodiment are all perpendicular to the bottom surface of the blade groove 13; the No. 1 support plane 17 overlaps with the No. 2 support plane 18 after rotating 180 degrees around the cutter bar axis x; After the boss 15 rotates 180 degrees around the tool bar axis x, it overlaps with the No. 2 boss 16; the No. 1 support plane 17 is parallel to the No. 2 support plane 18, and the No. 1 support plane 17 and the No. 2 support plane 18 are all aligned with the knife The rod axes x are parallel.

The cutter head 2 in the present embodiment comprises a cutter head body 21 and a positioning post 22, wherein the fixing post 2 is a cylindrical structure, one end of the positioning post 22 is fixed on one end of the cutter head body 21, and the other end of the cutter head body 21 is set There is a drill point 23 with a main cutting edge and a grinding chisel edge 24 on the drill point 23 . In this embodiment, the two sides of the cutter head body 21 are provided with a No. 1 support surface 26 and a No. 2 support surface 27. The No. 1 support surface 26 and the No. 2 support surface 27 are both planar structures, and the No. 1 support surface 26 is around the axis of the cutter head. After y is rotated by 180 degrees, it overlaps with the No. 2 support surface 27 . No. 1 screw hole 28 and No. 2 screw hole 29 are arranged in the cutter head body 21 of this embodiment, one end of No. 1 screw hole 28 is flush with No. 1 support surface 26, and one end of No. flush, the axis of the No. 1 screw hole 28 is perpendicular to the No. 1 support surface 26 , and the axis of the No. 2 screw hole 29 is perpendicular to the No. 2 support surface 27 .

The grinding chisel edge 24 in this embodiment is usually an X-shaped structure, the included angle of the drill tip 23 is usually 135 degrees, the main cutting edge usually adopts a wave-shaped edge structure, and the outer wall of the cutter head body 21 can be provided with an outer round back angle 210 Or to clean the outer circle of the rear corner, the outer wall of the cutter head body 21 can also be provided with a negative cutting edge 25 .

The positioning column 22 in this embodiment is located in the positioning hole 14, the cutter head body 21 is located in the blade groove 13, the No. 1 support surface 26 is close to the No. 1 support plane 17, and the No. 2 support surface 27 is close to the No. 2 support plane 18. The cutter bar 1 supports and limits the cutter head 2 to ensure the stability of the cutter head 2's rotation and cutting. The No. 1 screw 3 is threadedly connected in the No. 1 screw hole 28 and the No. 1 fixing screw hole 19, and the No. 2 screw 4 is threaded in the No. 2 screw hole 29 and the No. 2 fixing screw hole 110, thereby the cutter head 2 and the knife bar 1 Firmly fixed. Normally, the No. 1 screw 3 is threaded in the No. 1 screw hole 28 and the No. 1 fixing screw hole 19 in turn, and the No. 2 screw 4 is threaded in the No. 2 screw hole 29 and the No. 2 fixing screw hole 110 in turn.

The cutter bar 1 in this embodiment can clamp the cutter head 2 conveniently and firmly, and the integral drill bit is changed into a cutter head replaceable drill bit, and the cutter head is fixed by a center positioning hole, a screw and a blade groove 13 . The chip flute 12 in this embodiment can increase the cross-section to form a super-large chip flute 12, which prolongs the service life of the tool and reduces the cost. The super-large cross-section of the chip flute 12, the clamping screw hole and the insert groove , making it suitable for knives of multiple specifications. The utility model can clamp the blade by machine clamping, and self-made blades can be used to improve the use efficiency and service life of the drill bit, improve the machining accuracy, make the cutter head more stable when clamped on the cutter rod, and the drilling is more stable and chip removal smoother.

The cutter head 2 in this embodiment can be clamped conveniently and firmly, and the integral drill bit is improved into a drill bit with a replaceable cutter head, so that the service life of the cutter is prolonged and the cost is reduced. The cutter head in this embodiment can be positioned by the outer circle of the cylindrical step, and fixed by screw clamping. Outer dorsal angle. The fixing position of the utility model has blade grooves and screw holes, and the cutting position has special cutter head shapes such as X-shaped grinding chisel edge, drill point angle and outer round back angle, which can make the tool processing range wider. The utility model can adopt the self-made cutter head through the machine-clamp type clamping cutter head, improves the use efficiency and service life of the drill bit, and improves the machining accuracy.

In addition, it should be noted that the specific embodiments described in this specification may be different in parts, shapes and names of parts, and the above content described in this specification is only an illustration of the structure of the present invention. All equivalent changes or simple changes based on the structure, features and principles described in the utility model patent concept are included in the protection scope of the utility model patent. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the definition defined in the claims scope, all should belong to the protection scope of the present utility model.

Claims (10)

1. A drill bit with a replaceable cutter head, comprising a cutter bar, a cutter head, a No. 1 screw and a No. 2 screw. The head includes a cutter head body and a positioning post, one end of the positioning post is fixed on one end of the cutter head body, and the other end of the cutter head body is provided with a drill tip with a main cutting edge and a grinding transverse The blade is characterized in that: one end of the tool bar body is provided with a No. 1 boss and a No. 2 boss, and the No. 1 boss is provided with a No. 1 support plane and a No. 1 fixing screw hole, and the No. 1 fixing screw hole The axis of the No. 1 support plane is perpendicular to the No. 1 support plane. The No. 2 support plane and the No. 2 fixing screw hole are arranged on the No. 2 boss. The axis of the No. 2 fixing screw hole is perpendicular to the No. 2 support plane. The No. 1 support A blade slot is formed between the plane and the No. 2 support plane, and a positioning hole is provided at the bottom of the blade slot; a No. 1 support surface and a No. 2 support surface are arranged on both sides of the cutter head body, and the No. 1 support surface and the No. 2 support surface The supporting surfaces are all plane structures, and the first screw hole and the second screw hole are arranged in the cutter head body. One end of the first screw hole is flush with the first supporting surface, and one end of the second screw hole is flush with the second screw hole. The No. 1 support surface is flush, the positioning column is located in the positioning hole, the cutter head body is located in the blade groove, the No. 1 support surface is close to the No. 1 support plane, and the No. 2 support surface is close to the No. 2 support plane. , the No. 1 screw is threaded in the No. 1 screw hole and the No. 1 fixing screw hole, and the No. 2 screw is threaded in the No. 2 screw hole and the No. 2 fixing screw hole. 2. The drill bit with replaceable cutter head according to claim 1, characterized in that: an inner cooling passage is arranged in the cutter body, and the entrance of the inner cooling passage is at the center of the rear end of the shank of the cutter body. Or on the outer circle of the shank, the outlet of the internal cooling channel is located at the end face of the blade or in the chip flute near the cutter head. 3. The replaceable bit drill bit according to claim 1 or 2, characterized in that: the No. 1 support plane overlaps with the No. 2 support plane after rotating 180 degrees around the axis of the cutter bar; the No. 1 support plane After rotating 180 degrees around the axis of the cutter head, it overlaps with the No. 2 support surface. 4. The replaceable bit drill according to claim 1 or 2, characterized in that: the No. 1 boss overlaps with the No. 2 boss after rotating 180 degrees around the shaft axis. 5. The replaceable cutter head drill according to claim 1 or 2, characterized in that: the No. 1 support plane and the No. 2 support plane are parallel, and the No. 1 support plane and the No. 2 support plane are both in line with the tool holder The axes are parallel, and the No. 1 support plane and the No. 2 support plane are both perpendicular to the bottom surface of the insert groove; the axis of the No. 1 screw hole is perpendicular to the No. 1 support surface, and the axis of the No. 2 screw hole is perpendicular to the No. 2 support plane. face vertical. 6. The replaceable bit drill bit according to claim 1 or 2, characterized in that: the grinding chisel edge has an X-shaped structure, and the main cutting edge adopts a wave-shaped edge structure. 7. The replaceable bit drill according to claim 1 or 2, characterized in that: the outer wall of the bit body is provided with a negative cutting edge 25 and an outer back angle 210. 8. The replaceable bit drill according to claim 1 or 2, characterized in that: the number of the chip removal flutes 12 is two, and the chip removal flutes are in a straight flute structure or a spiral flute structure. 9. The replaceable bit drill according to claim 1 or 2, characterized in that: the axis of the positioning hole overlaps with the axis of the cutter bar. 10. The replaceable cutter head drill according to claim 1 or 2, characterized in that: the No. 1 screw is threaded in the No. 1 screw hole and the No. 1 fixing screw hole in turn, and the No. 2 screw is threaded in turn Connected in the No. 2 screw hole and the No. 2 fixing screw hole.