CN112157298A - Round pin centering single-limit side pressure locking tooth crown tool bit - Google Patents
Round pin centering single-limit side pressure locking tooth crown tool bit Download PDFInfo
- Publication number
- CN112157298A CN112157298A CN202011125942.4A CN202011125942A CN112157298A CN 112157298 A CN112157298 A CN 112157298A CN 202011125942 A CN202011125942 A CN 202011125942A CN 112157298 A CN112157298 A CN 112157298A
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- China
- Prior art keywords
- tool bit
- side pressure
- cylindrical pin
- crown
- pressure locking
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- Pending
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/06—Drills with lubricating or cooling equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/02—Connections between shanks and removable cutting heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/40—Flutes, i.e. chip conveying grooves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a round pin centering single-limit side pressure locking tooth crown tool bit which comprises a tooth crown tool bit, wherein the tooth crown tool bit is eccentrically and concentrically arranged on a drill rod by adopting a cylindrical pin, a locking surface is arranged on the cylindrical pin, an included angle between the locking surface and a central axis of the drill rod forms an acute angle, one side of the cylindrical pin forms a guide surface, the other side of the cylindrical pin forms a bottom surface, the bottom surface is vertical to the central axis of the drill rod, the central axis of the cylindrical pin is not overlapped with the central axes of the backs of two side surfaces formed at two sides of the bottom surface, one side of the bottom surface, which is far away from the cylindrical pin, is ground to form a. The round pin centering single-limit side pressure locking tooth crown tool bit provided by the invention is simple to manufacture, high in manufacturing efficiency and low in cost, the cylindrical pin is used for centering, the cylindrical pin is eccentrically designed, the situation that the tool bit cannot be locked and fall off due to the fact that the tool bit side pressure locking surface is wrongly installed is prevented, the centering precision is high, the strength is high, the round pin centering single-limit side pressure locking tooth crown tool bit is suitable for various chip grooves, the tool bit is firmly fixed, and high cutting torque can be borne.
Description
Technical Field
The invention belongs to the technical field of precise and efficient metal cutting tools, and particularly relates to a round pin centering single-limit side pressure locking crown tool bit.
Background
With the rapid development of the industries such as engineering machinery, heat exchangers, wind power and the like, large-diameter holes are machined more and more, but the existing integral hard alloy drill bit for machining the holes is expensive and high in machining cost. Therefore, the crown cutter head is produced at the same time, the crown cutter head is a combined drill bit with the head made of hard alloy or other high-performance materials and the drill rod made of alloy steel materials, and the combined drill bit is suitable for machining large-diameter holes and has the advantages of low use cost, large machining range and the like. At present, the head and the drilling rod of tooth crown tool bit have multiple compound mode, but most structure is complicated, the cost of manufacture is high, for this reason, seek a novel, high-efficient, low-cost, the high tooth crown tool bit compound mode of precision and have important realistic meaning.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention aims to provide a round pin centering single-limit side pressure locking crown cutter head.
In order to achieve the purpose and achieve the technical effect, the invention adopts the technical scheme that:
the utility model provides a round pin centering single spacing side pressure locking crown tool bit, includes the crown tool bit, the crown tool bit adopts the cylindric lock eccentric centering detachable to install on the drilling rod, the crown tool bit includes locking surface, spigot surface, cylindric lock, bottom surface, apex angle and transition face, sets up the locking surface on the cylindric lock, contained angle acutangulate between the axis of locking surface and drilling rod, cylindric lock one side shrinks gradually and forms the spigot surface, the cylindric lock opposite side forms the bottom surface, the bottom surface is perpendicular with the axis of drilling rod, the axis of cylindric lock does not coincide with the axis at the both sides face back that the bottom surface both sides formed, one side grinding that the cylindric lock was kept away from to the bottom surface forms apex angle and chip groove, the apex angle is right angle or obtuse angle, be equipped with edge.
Furthermore, the central axis of the cylindrical pin is higher than the central axes of the two side surface backs formed on the two sides of the bottom surface, and the eccentricity between the central axis of the cylindrical pin and the central axes of the two side surface backs formed on the two sides of the bottom surface is 0.05-0.2 mm.
Furthermore, the included angle between the locking surface and the central axis of the drill rod is 20-60 degrees.
Further, the helix angle of chip groove is 0 ~ 35.
Further, the vertex angle grinding forms a main edge and an inner edge, and a transition edge is formed between the main edge and the inner edge.
Furthermore, the length of the inner blade is 1/4-1/2 of the length of the main blade.
Furthermore, the arc size of the transition edge is R0.1-3 mm.
Compared with the prior art, the invention has the beneficial effects that:
the invention discloses a circular pin centering single-limit side pressure locking crown cutter head, which comprises a crown cutter head, wherein the crown cutter head is detachably mounted on a drill rod in a centering manner by adopting a cylindrical pin eccentric centering manner, the crown cutter head comprises a locking surface, a guide surface, a cylindrical pin, a bottom surface, a vertex angle and a transition surface, the locking surface is arranged on the cylindrical pin, an included angle between the locking surface and the central axis of the drill rod forms an acute angle, one side of the cylindrical pin gradually shrinks to form the guide surface, the other side of the cylindrical pin forms a bottom surface, the bottom surface is vertical to the central axis of the drill rod, the central axis of the cylindrical pin does not coincide with the central axes of the backs of two side surfaces formed on the two sides of the bottom surface, one side of the bottom surface, which is far away from the cylindrical pin. The round pin centering single-limit side pressure locking tooth crown tool bit provided by the invention is simple to manufacture, high in manufacturing efficiency and low in cost, the cylindrical pin is used for centering, the cylindrical pin adopts an eccentric design, the situation that the tool bit cannot be locked and fall off due to the fact that the tool bit side pressure locking surface is installed wrongly is effectively prevented, and the centering precision is high; the cutter head has thick width and high strength, can be repeatedly assembled and disassembled for many times, is not easy to break and wear, and is suitable for various chip grooves; the inclined surface of the side pressing surface of the cutter head is locked, so that the cutter head is firmly fixed and prevented from loosening in the use process; the single-limit loading and unloading are convenient, and the operation is simple; the bottom surface is tightly matched with the cutter bar, and can bear high cutting torque.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a perspective view of the drill stem of the present invention;
FIG. 3 is a schematic perspective view of a crown bit of the present invention;
FIG. 4 is a schematic structural view of the present invention;
FIG. 5 is a left side view of the present invention;
3 FIG. 3 6 3 is 3 a 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 line 3 A 3- 3 A 3 of 3 FIG. 3 4 3 in 3 accordance 3 with 3 the 3 present 3 invention 3; 3
FIG. 7 is a schematic structural view of the drill stem of the present invention;
fig. 8 is a cross-sectional view B-B of fig. 7 in accordance with the present invention.
FIG. 9 is a schematic view of the configuration of the crown bit of the present invention;
FIG. 10 is a schematic view of the construction of the flutes and back of the present invention;
fig. 11 is a left side view of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention is provided to enable those skilled in the art to more easily understand the advantages and features of the present invention, and to clearly and clearly define the scope of the present invention.
As shown in figures 1-11, a round pin centering single-limit side pressure locking crown bit comprises a drill rod 1, a crown bit 2 and a locking screw 3, wherein the crown bit 2 is positioned by a cylindrical pin and is eccentrically fastened on the drill rod 1 through the locking screw 3, specifically, a cylindrical pin positioning hole 12 is arranged in the middle of the left end face of the drill rod 1 for positioning the crown bit 2, a fastening screw hole 13 is arranged on one side face of the cylindrical pin positioning hole 12, a counter bore 14 is arranged on one side (top) of the fastening screw hole 13 away from the cylindrical pin positioning hole 12, the central axis of the counter bore 14 is eccentric to the central axis of a bottom fastening screw hole 13, the eccentricity H is 0.005-0.1 mm, during assembly, the crown bit 2 is inserted into the cylindrical pin positioning hole 12 of the drill rod 1, the locking screw 3 is screwed into the fastening screw hole 13 and is connected with a locking surface 15 of the crown bit 2 until the crown bit 2 is tightly fixed on the drill rod 1, when the locking screw 3 is screwed into the fastening screw hole 13, a certain friction force is generated between the locking screw and the counter bore 14 to eccentrically fasten the crown bit 2, the locking surface 15 of the crown bit 2 is an inclined surface, and the included angle between the plane where the locking screw is located and the central axis of the drill rod 1 is 20-60 degrees.
The drill rod 1 is of a coaxial cylinder structure formed by a working portion 4, a neck portion 5 and a handle portion 6 from left to right and taking the same central axis as a central line, a spiral chip removal groove 7 and a cutter back 8 are arranged on the working portion 4, the chip removal groove 7 plays a role in chip containing and removing during working, the solid portion of the working portion 4 except the chip removal groove 7 is called the cutter back 8, the spiral angle of the chip removal groove 7 is 0-35 degrees, left and right rotation is achieved, the width of the cutter back 8 is the same as that of the chip removal groove 7, the inner tangent circle in the center of the cutter back 8 is the drill rod core thickness 9, the core thickness is 25-40 percent of the diameter of the outer circle of the drill rod 1, the core thickness is larger, the strength is higher, the feeding speed is higher during working, the core thickness is smaller, the cutter back 8 of the solid portion is.
A main cooling hole 10 penetrates through the middle part of the drill rod 1, and the outlet of the main cooling hole 10 is Y-shaped as shown in figures 2 and 4; the main cooling holes 10 are located inside the drill rod core thickness 9, as shown in fig. 3. Specifically, the main cooling hole 10 is provided with two outlets 11 on the left end surface of the working portion 4, and a Y-shaped structure is formed between the main cooling hole 10 and the two outlets 11, so as to supply the coolant to the crown bit 2 during operation.
The neck part 5 is a combination body consisting of a conical body part and a cylindrical body part which are sequentially connected from left to right and are coaxial, so that during working, chips can be prevented from splashing and impacting the tool handle and the machine tool spindle, and a protection effect is achieved.
The handle part 6 is a section of cylinder structure with high circular precision, and the handle part 6 is clamped by the tool holder to transmit power of the machine tool during use, so that the tool rotates and has cutting capacity. A main cooling hole 10 extends through the central axis of the shank 6 and delivers coolant from the machine tool cooling system to the tool.
The crown cutter head 2 of the invention comprises a guide surface 25, a locking surface 26 and a cylindrical pin 27, the drill rod comprises a bottom surface 28, a transition surface 29 and a vertex angle 210, a locking surface 26 is arranged on a cylindrical pin 27, the center of the inclined surface of the locking surface 26 coincides with the central axis of a locking screw 3, an included angle between the plane where the locking surface 26 is located and the central axis of the drill rod 1 forms an acute angle, one side (right side) of the cylindrical pin 27 gradually contracts to form a guide surface 25, the width and the angle of the guide surface 25 are 0.2-1 x 30 degrees, the guide effect is achieved by convenient installation, the bottom surface 28 is formed by the opposite side of the cylindrical pin 27 and is perpendicular to the central axis of the drill rod 1, the central axis of the cylindrical pin 27 does not coincide with the central axes of two side surface back parts 218 formed by the upper side and the lower side of the bottom surface 28, the side of the bottom surface 28 far away from the cylindrical pin 27 is ground to form the vertex angle 210 and.
The manufacturing process of the crown gear cutter head 2 comprises the following steps:
during manufacturing, the cylindrical pin 27, the guide surface 25, the transition surface 29 and the large outer circle diameter 214 are ground to form the bottom surface 28, and at the moment, the central axes of the two side surface backs 218 formed by the upper side and the lower side of the cylindrical pin 27 and the bottom surface 28 do not coincide with the central axis of the drill rod 1; grinding the locking surface 26, the bottom surface 28 and the vertex angle 210 by taking the cylindrical pin 27 as a reference, wherein the included angle between the locking surface 26 and the central axis of the drill rod 1 is 20-60 degrees, the bottom surface 28 is perpendicular to the central axis of the drill rod 1, and the angle a of the vertex angle 210 is 90-180 degrees; grinding the two side surface backs 218 formed on the upper side and the lower side of the bottom surface 28 to enable the central axes of the two side surface backs 218 and the central axes of the cylindrical pins 27 to be asymmetric, wherein the eccentricity H1 is 0.05-0.2 mm, and the central axes of the cylindrical pins 27 are higher than the central axes of the two side surface backs 218 formed on the two sides of the bottom surface; and then the chip grooves 211 and the back 213 are ground to form an edge 24, and the spiral angle 212 of the chip grooves 211 is 0-35 degrees.
Grinding a main edge 217 and an inner edge 215 of the top corner 210, forming a transition edge 216 between the main edge 217 and the inner edge 215, wherein the length of the inner edge 215 is 1/4-1/2 of that of the main edge 217, and the size of an arc of the transition edge 216 is R0.1-3 mm.
The parts of the invention not specifically described can be realized by adopting the prior art, and the details are not described herein.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. The utility model provides a round pin centering single spacing side pressure locking crown tool bit, a serial communication port, including the crown tool bit, the crown tool bit adopts the eccentric centering detachable installation of cylindric lock on the drilling rod, the crown tool bit includes locking surface, spigot surface, cylindric lock, bottom surface, apex angle and transition face, sets up the locking surface on the cylindric lock, and contained angle between the axis of locking surface and drilling rod becomes the acute angle, and cylindric lock one side shrinks gradually and forms the spigot surface, and the cylindric lock opposite side forms the bottom surface, and the bottom surface is perpendicular with the axis of drilling rod, and the axis at the both sides of the axis of cylindric lock and the both sides of bottom surface formation both sides back do not coincide, and one side grinding that the cylindric lock was kept away from to the bottom surface forms apex angle and chip groove, and the apex angle.
2. The circular pin centering single-limit side pressure locking crown bit according to claim 1, wherein the central axis of the cylindrical pin is higher than the central axes of the two side surface backs formed on both sides of the bottom surface, and the eccentricity between the central axis of the cylindrical pin and the central axes of the two side surface backs formed on both sides of the bottom surface is 0.05-0.2 mm.
3. The round pin centering single-limit side pressure locking crown bit according to claim 1, wherein an included angle between the locking surface and a central axis of the drill rod is 20-60 degrees.
4. The round pin centering single-limit side pressure locking crown cutter head as claimed in claim 1, wherein the helix angle of the chip groove is 0-35 °.
5. The round pin centering single location side pressure locking crown bit according to claim 1, wherein said top corner grinding forms a main edge and an inner edge, said main edge and said inner edge forming a transition edge therebetween.
6. The round pin centering single-limit side pressure locking crown bit according to claim 5, wherein the length of the inner edge is 1/4-1/2 of the length of the main edge.
7. The round pin centering single-limit side pressure locking crown bit according to claim 5, wherein the arc size of the transition edge is R0.1-3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011125942.4A CN112157298A (en) | 2020-10-20 | 2020-10-20 | Round pin centering single-limit side pressure locking tooth crown tool bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011125942.4A CN112157298A (en) | 2020-10-20 | 2020-10-20 | Round pin centering single-limit side pressure locking tooth crown tool bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112157298A true CN112157298A (en) | 2021-01-01 |
Family
ID=73867670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011125942.4A Pending CN112157298A (en) | 2020-10-20 | 2020-10-20 | Round pin centering single-limit side pressure locking tooth crown tool bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112157298A (en) |
-
2020
- 2020-10-20 CN CN202011125942.4A patent/CN112157298A/en active Pending
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