CN219746434U - Three-blade internal cooling drill bit - Google Patents

Abstract

The utility model relates to a three-blade internal cooling drill bit which comprises a cutter handle and a cutter head, wherein the upper end part of the cutter handle is fixedly connected with a mounting block for mounting the cutter handle, the cutter head is connected to the lower end part of the cutter handle, one side of the cutter head, which is away from the cutter handle, is fixedly connected with a plurality of cutter teeth, the cutter handle is provided with a vertical hole, the cutter teeth are provided with through holes communicated with the vertical hole, the upper end part of the cutter handle is provided with an annular groove, the annular groove is slidably connected with a lower disc block in a sliding manner, the lower end part of the lower disc block is fixedly connected with a connecting pipe, the connecting pipe is slidably connected in the vertical hole and is attached to the inner wall of the vertical hole, an annular cavity communicated with the connecting pipe is formed in the lower disc block, the upper end surface of the annular cavity is provided with a first connecting hole communicated with the annular cavity, the upper end part of the lower disc block is rotationally connected with an upper disc block, and one end of the upper disc block, which is away from the lower disc block, is fixedly provided with an installation tube. The present utility model has the effect of facilitating the discharge of metal chips in the through holes.

Description

Three-blade internal cooling drill bit

Technical Field

The utility model relates to the technical field of drilling tools, in particular to a three-blade internal cooling drill bit.

Background

When the drill bit drills, high-speed friction with a workpiece generates high temperature, cooling liquid is required to be sprayed to the drill bit, but when holes with deeper depths are processed, the cooling liquid is not easy to contact with the drill bit, and the cooling effect is poor. The three-blade internal cooling drill bit is one of drill bits and is provided with three cutter teeth for drilling, and through holes for conveying cooling liquid are formed in the three cutter teeth along the axial direction, so that the cooling liquid is conveniently conveyed into the deep holes for cooling.

The related art can refer to Chinese patent publication No. CN217799173U for disclosure of a high-speed internal cooling drill bit, comprising a drill body and a handle, wherein the drill body and the handle are fixedly connected; the drill body head is provided with a replaceable center drill and a plurality of replaceable blades, wherein the blades comprise a peripheral blade, a center blade and an intermediate blade, the peripheral blade is arranged close to the outer edge of the drill body head, the center blade is arranged between the peripheral blade and the center drill, and the intermediate blade is arranged on the opposite sides of the center blade and the peripheral blade and is positioned at a half radius from the center drill; the drill body is internally provided with a plurality of channels for passing through cutting fluid, and the head of the drill body is provided with at least one first inner cooling hole for passing through the cutting fluid.

Aiming at the related technology, when the internal cooling drill bit drills a metal piece, metal scraps are generated, the metal scraps enter the first internal cooling Kong Zhongyi to cause the blockage of the first internal cooling hole, the diameter of the first internal cooling hole is smaller, and the metal scraps are not easy to take out.

Disclosure of Invention

In order to facilitate the discharge of metal chips in the through holes, the utility model provides a three-blade internally-cooled drill bit.

The utility model provides a three-blade internal cooling drill bit, which adopts the following technical scheme:

the utility model provides a cold drill bit in three sword, includes handle of a knife and tool bit, handle of a knife upper end fixedly connected with is used for installing the installation piece of handle of a knife, and the tool bit is connected in the tip under the handle of a knife, and one side fixedly connected with that the tool bit deviates from the handle of a knife has been seted up and has been found the hole, and the through-hole with perpendicular hole intercommunication has been seted up to the tool bit, and the ring channel has been seted up to handle of a knife upper end, and sliding connection has lower disc piece, and lower disc piece lower tip fixedly connected with connecting pipe, connecting pipe sliding connection just laminate with perpendicular hole inner wall in perpendicular hole, the annular chamber with connecting pipe intercommunication has been seted up to lower disc piece inside, the connecting hole with annular chamber intercommunication is seted up to annular chamber up to lower disc piece upper end, and the connecting hole second with connecting hole intercommunication is seted up to upper disc piece, and the one end that the disc piece deviates from lower disc piece is fixed with the installation tube.

Through adopting above-mentioned technical scheme, the handle of a knife passes through the installation piece and installs on drilling machine, and then makes drilling machine drive the tool bit through the handle of a knife and rotates for the tool bit drills through the cutter tooth. The mounting pipe is used for connecting a mechanism for conveying cooling liquid, the cooling liquid enters the second connecting hole along the connecting pipe, sequentially enters the annular cavity and the connecting pipe along the first connecting hole from the second connecting hole, and finally is sprayed out of the through hole from the vertical hole to realize cooling. When the through hole is blocked, under the supporting effect of the connecting pipe, the upper disc block and the lower disc block are moved towards the direction away from the cutter handle, and then the upper disc block is rotated, so that the first connecting hole and the second connecting hole are mutually staggered and disconnected, the upper disc block is pushed to approach the cutter handle, the air pressure in the vertical hole is further increased, and the increased air pressure is favorable for pushing out metal scraps in the through hole.

Optionally, the first vertical groove is set up to lower disc piece fixedly connected with slider, and slider one sliding connection just laminates with the handle of a knife in vertical groove one, goes up disc piece sliding connection and has slider two, and vertical groove two has been set up to the handle of a knife, slider two sliding connection just laminates with the handle of a knife in vertical groove two.

By adopting the technical scheme, the first sliding block of the first vertical groove is limited, so that the rotation of the lower disc block is limited; the second vertical groove limits the second sliding block, so that the rotation of the upper disc block is limited, and the stability of the first connecting hole and the second connecting hole in a communication state is improved.

Optionally, the second fixedly connected with trapezoidal piece of slider, upward disc piece has seted up the dovetail groove along the direction of height, trapezoidal piece sliding connection in the dovetail groove, and the second lower tip of slider has set firmly the fixture block, and the draw-in groove with fixture block adaptation has been seted up to annular piece up end.

Through adopting above-mentioned technical scheme, when with connecting hole one with connecting hole two closed, the slider just is located slider one, under the spacing effect of trapezoidal groove to trapezoidal piece, promotes slider two to slider one and is close to for the fixture block gets into the draw-in groove and with draw-in groove inner wall laminating, go up the disc piece and down the disc piece between to rotating to being restricted, and then be favorable to keeping connecting hole one and connecting hole two closed condition stable when the clearance metal fillings.

Optionally, the connecting pipe is fixedly connected with stopper along circumference, and vertical hole inner wall has seted up along the direction of height and has erected the groove III, stopper sliding connection in erecting the inslot to laminate with erecting the groove III inner wall.

Through adopting above-mentioned technical scheme, erect the groove and carry out spacingly to the stopper in three pairs, be favorable to reducing the probability that the connecting pipe slided in from erecting the hole.

Optionally, tip fixedly connected with rectangle piece under the handle of a knife, the rectangle groove with rectangle piece adaptation is seted up to the tool bit, rectangle piece sliding connection in the rectangle inslot and with rectangle inslot wall laminating, the tool bit is equipped with countersunk head bolt, countersunk head bolt wears to establish tool bit and rectangle piece threaded connection.

Through adopting above-mentioned technical scheme, under the limiting displacement of rectangle inslot wall to the rectangle piece, drive the tool bit and rotate when the handle of a knife rotates, and then drive the cutter tooth and drill. Under the matching action of the countersunk head bolt and the rectangular block, the cutter head is connected with the cutter handle. The cutter head is detached through detaching the countersunk head bolt when the cutter teeth are damaged, so that the cutter teeth are convenient to replace, and resource waste is reduced.

Optionally, lower disc up end fixedly connected with spliced pole, the spliced pole wears to establish the disc piece and rotates rather than being connected, and the disc piece is equipped with the spacing dish, and the spacing dish is equipped with fixing bolt, and fixing bolt wears to establish spacing dish and spliced pole threaded connection.

Through adopting above-mentioned technical scheme, the spliced pole supports the rotation of going up the disc piece, and fixing bolt and spacing dish cooperation make the spacing relative positioning of going up disc piece and lower disc piece, can dismantle the disc piece through dismantling fixing bolt, are convenient for change the disc piece.

Optionally, the lower end of the tool shank is provided with a chip groove, and the tool bit is provided with a plurality of through grooves communicated with the chip groove.

Through adopting above-mentioned technical scheme, the metal fillings that produce when cutter tooth drilling get into the chip groove by logical groove to discharge by the chip groove, be favorable to reducing the probability that the metal fillings gathered in the downthehole influence drilling.

Optionally, the handle of a knife has been seted up a plurality of holes, and a hole and a perpendicular hole intercommunication.

Through adopting above-mentioned technical scheme, there is a branch hole to discharge to the handle of a knife outside in the coolant liquid in the perpendicular hole, is favorable to improving the cooling rate to the handle of a knife.

In summary, the present utility model includes at least one of the following beneficial technical effects:

1. the tool shank passes through the installation piece and installs on drilling machine, and then makes drilling machine drive the tool bit through the tool shank and rotate for the tool bit drills through the cutter tooth. The mounting pipe is used for connecting a mechanism for conveying cooling liquid, the cooling liquid enters the second connecting hole along the connecting pipe, sequentially enters the annular cavity and the connecting pipe along the first connecting hole from the second connecting hole, and finally is sprayed out of the through hole from the vertical hole to realize cooling. When the through hole is blocked, under the supporting action of the connecting pipe, the upper disc block and the lower disc block are moved in the direction away from the cutter handle, and then the upper disc block is rotated, so that the first connecting holes and the second connecting holes are mutually staggered and disconnected, the upper disc block is pushed to approach the cutter handle, the air pressure in the vertical hole is further increased, and the increased air pressure is favorable for pushing out metal scraps in the through hole;

2. the first vertical groove limits the first sliding block, so that the rotation of the lower disc block is limited; the second vertical groove limits the second sliding block, so that the rotation of the upper disc block is limited, and the stability of the first connecting hole and the second connecting hole in a communication state is improved;

3. when the first connecting hole and the second connecting hole are closed, the sliding block is positioned right above the first sliding block, and under the limiting effect of the trapezoid groove on the trapezoid block, the first sliding block is pushed to approach the second sliding block, so that the clamping block enters the clamping groove and is attached to the inner wall of the clamping groove, and the opposite rotation between the upper disc block and the lower disc block is limited, so that the first connecting hole and the second connecting hole can be kept stable in closing state when metal scraps are cleaned.

Drawings

Fig. 1 is a schematic diagram of the overall structure of a three-bladed internally cooled drill bit.

Fig. 2 is a schematic view intended to highlight the internal structure of the shank.

Fig. 3 is a schematic view intended to highlight the connection of the upper disc block with the lower disc block.

Reference numerals illustrate: 1. a knife handle; 2. a cutter head; 11. a mounting block; 21. cutter teeth; 12. a vertical hole; 211. a through hole; 13. an annular groove; 3. a lower disc block; 31. a connecting pipe; 32. an annular cavity; 33. a first connecting hole; 34. a first sliding block; 35. a connecting column; 14. a first vertical groove; 4. an upper disc block; 41. a second connecting hole; 42. installing a pipe; 43. a second slide block; 15. a second vertical groove; 431. a clamping block; 341. a clamping groove; 432. a trapezoid block; 44. a trapezoid groove; 45. a limiting disc; 451. a fixing bolt; 311. a limiting block; 121. a vertical groove III; 16. rectangular blocks; 17. countersunk head bolts; 22. rectangular grooves; 18. a chip removal groove; 23. a through groove; 19. and (5) supporting holes.

Detailed Description

The present utility model will be described in further detail below with reference to the accompanying drawings.

The embodiment of the utility model discloses a three-blade internal cooling drill bit.

Referring to fig. 1 and 2, a three-blade internal cooling drill bit comprises a cutter handle 1 and a cutter head 2, wherein an integrally formed mounting block 11 is arranged at the upper end part of the cutter handle 1, and an operator installs the cutter handle 1 on a drilling machine through the mounting block 11, so that the drilling machine drives the cutter handle 1 to rotate. One end of the tool shank 1, which is far away from the mounting block 11, is fixed with a rectangular block 16, the upper end of the tool bit 2 is provided with a rectangular groove 22, and an operator inserts the rectangular block 16 into the rectangular groove 22, so that the rectangular block 16 is attached to the inner wall of the rectangular groove 22, and the tool shank 1 drives the tool bit 2 to rotate, and at the moment, the rectangular block 16 is in sliding connection with the rectangular groove 22.

Referring to fig. 2 and 3, the cutter head 2 is provided with a countersunk head bolt 17, and an operator threads the countersunk head bolt 17 through the cutter head 2 and the rectangular block 16, thereby connecting the cutter head 2 and the cutter handle 1 to each other. The lower end of the cutter head 2 is fixedly provided with three cutter teeth 21, the cutter head 2 drills holes by driving the cutter teeth 21 to rotate, when the cutter teeth 21 are damaged, an operator dismantles the cutter head 2 after dismantles the countersunk head bolts 17, the cutter teeth 21 are replaced conveniently, the whole drill bit is not required to be replaced, and resource waste is reduced. The knife handle 1 is provided with a vertical hole 12, the three knife teeth 21 are provided with through holes 211, and the vertical hole 12 is communicated with the through holes 211.

Referring to fig. 1 and 2, an annular groove 13 is formed at one end of the tool shank 1 provided with the mounting block 11, a lower disc block 3 is arranged in the annular groove 13, and the lower disc block 3 is attached to the inner wall of the annular groove 13 and is in sliding connection with the inner wall of the annular groove. The lower disc block 3 is fixed with a connecting pipe 31, the connecting pipe 31 is positioned in the vertical hole 12 and is in sliding connection with the inner wall of the vertical hole 12, and the lower disc block 3 and the knife handle 1 vertically slide relatively under the supporting action of the connecting pipe 31. The outer circle of the connecting pipe 31 is fixedly provided with a limiting block 311, the inner wall of the vertical hole 12 is provided with a third vertical groove 121, the limiting block 311 is slidably connected in the third vertical groove 121, and the inner wall of the third vertical groove 121 limits the limiting block 311, so that the probability of sliding out of the connecting pipe 31 from the vertical hole 12 is reduced.

Referring to fig. 1 and 2, an annular cavity 32 is formed in the lower disc block 3, the annular cavity 32 is communicated with a connecting pipe 31, two first connecting holes 33 are formed in the lower disc block 3, and the first connecting holes 33 are communicated with the annular cavity 32. The spliced pole 35 can have in fixed the lower disc piece 3 up end, and spliced pole 35 rotates and is connected with disc piece 4, and the butt of last disc piece 4 up end has spacing dish 45, and the terminal surface is contradicted with spliced pole 35 under the spacing dish 45, and spacing dish 45 is equipped with fixing bolt 451, and operating personnel wears fixing bolt 451 to establish spacing dish 45 and spliced pole 35 threaded connection. Under the cooperation of the fixing bolts 451 and the limiting plates 45, the upper disc block 4 and the lower disc block 3 are mutually positioned.

Referring to fig. 1 and 2, the upper disc block 4 is provided with two second connecting holes 41, the second connecting holes 41 are communicated with the first connecting holes 33, the upper end face of the upper disc block 4 is fixedly provided with a mounting tube 42, the two second connecting holes 41 are located in the mounting tube 42, the mounting tube 42 is provided with internal threads, an operator connects the mounting tube 42 with a mechanism for conveying cooling liquid, so that the cooling liquid enters the second connecting holes 41, enters the annular cavity 32 along the first connecting holes 33, then enters the vertical holes 12 from the connecting pipes 31, and finally enters the drill hole connection part from the through holes 211 to cool the cutter teeth 21. The mounting tube 42 has different sizes, is convenient for connect different mechanism of carrying the coolant liquid, and the disc piece 4 is more convenient to change after the fixing bolt 451 is dismantled to operating personnel.

Referring to fig. 1 and 2, the lower disc block 3 is fixedly connected with two first sliders 34 along the circumferential direction, the cutter handle 1 is provided with a first vertical groove 14 corresponding to the first sliders 34, the upper end of the first vertical groove 14 is communicated with the outside, the first sliders 34 are slidably connected in the first vertical groove 14, the first sliders 34 are attached to the inner walls of the first vertical groove 14, and the rotation of the lower disc block 3 along the axial direction is limited under the limit effect of the inner walls of the first vertical groove 14 on the first sliders.

Referring to fig. 2 and 3, the upper disc block 4 is provided with a second slider 43, the second slider 43 is fixed with a trapezoid block 432, the upper limit disc 45 is provided with a trapezoid groove 44 along the axial direction, the trapezoid block 432 is slidably connected in the trapezoid groove 44 and is attached to the inner wall of the trapezoid groove 44, and the second slider 43 slides along the trapezoid groove 44 under the limit action of the lower trapezoid groove 44 on the trapezoid block 432. The handle 1 is provided with a second vertical groove 15 matched with the first sliding block 34, the second sliding block 43 is slidably connected in the second vertical groove 15 and is attached to the inner wall of the second vertical groove 15, and the inner wall of the second vertical groove limits the sliding block, so that the rotation of the upper disc block 4 is limited. At this time, the upper disc block 4 and the lower disc block 3 are relatively stable, which is beneficial to keeping the communication state between the first connecting hole 33 and the second connecting hole 41 unchanged.

Referring to fig. 2 and 3, when metal scraps generated by drilling enter the through hole 211, an operator removes the tool handle 1 from the drilling machine, removes the upper disc block 4 and the lower disc block 3 from the annular groove 13, rotates the upper disc block 4 when the limiting block 311 is positioned at the uppermost end of the third vertical groove 121, so that the first connecting hole 33 and the second connecting hole 41 are closed, the second sliding block 43 is positioned at the upper end part of the first sliding block 34, the clamping block 431 is fixed at the lower end part of the second sliding block 43, the clamping groove 341 matched with the clamping block 431 is formed at the upper end part of the first sliding block 34, and the operator pushes the second sliding block 43 along the trapezoid groove 44, so that the clamping block 431 is inserted into the clamping groove 341, and the closed state of the first connecting hole 33 and the second connecting hole 41 is kept stable.

Referring to fig. 2 and 3, the upper disc block 4 is rapidly pushed towards the direction close to the tool handle 1, so that air in the vertical hole 12 is compressed, the pressure in the vertical hole 12 is further enhanced, thrust is generated on metal scraps in the through hole 211 after the pressure in the vertical hole 12 is increased, the metal scraps are conveniently discharged from the through hole 211, and convenience is brought to discharging the metal scraps.

Referring to fig. 2 and 3, the lower end of the tool shank 1 is provided with a chip groove 18 along the circumferential direction, the tool bit 2 is provided with three through grooves 23 communicated with the chip groove 18, the through grooves 23 are positioned between two tool teeth 21, and then metal chips are fed into the chip groove 18 from the through grooves 23 when drilling, and are discharged from the chip groove 18, so that the probability that the metal chips accumulate in holes and the drilling effect is affected is reduced when drilling. The shank 1 is provided with a plurality of branch holes 19 along the axial direction, the branch holes 19 are communicated with the vertical holes 12, cooling liquid enters the branch holes 19 from the vertical holes 12 and is discharged from the chip grooves 18 from the branch holes 19, so that the cooling effect on the shank 1 is improved, and the cooling efficiency is improved.

The embodiment of the utility model provides a three-blade internal cooling drill bit, which has the implementation principle that: when the metal scraps block the through hole 211, the operator moves the upper disc block 4 and the lower disc block 3 out of the annular groove 13, and when the connecting pipe 31 is at the maximum stroke, the operator rotates the upper disc block 4 so that the first connecting hole 33 and the second connecting hole 41 are staggered with each other, and at this time, the first connecting hole 33 is not communicated with the second connecting hole 41. The upper disc block 4 is pushed towards the direction close to the knife handle 1, so that the air pressure in the vertical hole 12 is increased, and the high air pressure is convenient for extruding the metal scraps in the through hole 211, so that the metal scraps are discharged conveniently.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (8)

1. The utility model provides a cold drill bit in three sword, includes handle of a knife (1) and tool bit (2), and tip fixedly connected with is used for installing installation piece (11) of handle of a knife (1) on handle of a knife (1), and tool bit (2) are connected in handle of a knife (1) lower extreme portion, and one side fixedly connected with a plurality of cutter teeth (21), its characterized in that of deviating from handle of a knife (1) of tool bit (2): the utility model discloses a knife handle, including handle (1), handle (3), connecting pipe (31), annular cavity (32) with connecting pipe (31) laminating have been seted up to handle (21), connecting hole (33) with annular cavity (32) intercommunication have been seted up to annular cavity (32) up end, connecting hole two (41) with connecting hole one (33) intercommunication have been seted up to upper end rotation of lower disc piece (3) in annular groove (1) upper end, upper disc piece (4) have been seted up with connecting hole one (33) intercommunication, one end of upper disc piece (4) deviates from lower disc piece (3) is fixed with install tube (42).

2. A three-bladed internally cooled drill bit according to claim 1, wherein: the lower disc block (3) is fixedly connected with a first sliding block (34), the knife handle (1) is provided with a first vertical groove (14), the first sliding block (34) is connected in the first vertical groove (14) in a sliding way and is attached to the knife handle (1), the upper disc block (4) is connected with a second slider (43) in a sliding manner, the handle (1) is provided with a second vertical groove (15), and the second slider (43) is connected in the second vertical groove (15) in a sliding manner and is attached to the handle (1).

3. A three-bladed internally cooled drill bit according to claim 2, wherein: the second slider (43) is fixedly connected with a trapezoid block (432), the trapezoid groove (44) is formed in the upper disc block (4) along the height direction, the trapezoid block (432) is slidably connected in the trapezoid groove (44), the lower end portion of the second slider (43) is fixedly provided with a clamping block (431), and the upper end face of the first annular block is provided with a clamping groove (341) matched with the clamping block (431).

4. A three-bladed internally cooled drill bit according to claim 1, wherein: the connecting pipe (31) is fixedly connected with a limiting block (311) along the circumferential direction, the inner wall of the vertical hole (12) is provided with a vertical groove III (121) along the height direction, and the limiting block (311) is slidably connected in the vertical groove III (121) and is attached to the inner wall of the vertical groove III (121).

5. A three-bladed internally cooled drill bit according to claim 1, wherein: the utility model discloses a tool holder, including handle of a knife (1), cutter head (2) are equipped with rectangle groove (22) with rectangle piece (16) adaptation, rectangle piece (16) sliding connection in rectangle groove (22) and with rectangle groove (22) inner wall laminating, cutter head (2) are equipped with countersunk head bolt (17), countersunk head bolt (17) wear to establish cutter head (2) and rectangle piece (16) threaded connection.

6. A three-bladed internally cooled drill bit according to claim 1, wherein: the utility model discloses a disc block, including disc block (3) and spliced pole (35) are worn to establish by spliced pole (35) disc block (4) and rotate rather than being connected, go up disc block (4) and be equipped with spacing dish (45), spacing dish (45) are equipped with fixing bolt (451), and limiting dish (45) and spliced pole (35) threaded connection are worn to establish by fixing bolt (451).

7. A three-bladed internally cooled drill bit according to claim 1, wherein: chip grooves (18) are formed in the lower end portion of the tool handle (1), and a plurality of through grooves (23) communicated with the chip grooves (18) are formed in the tool bit (2).

8. A three-bladed internally cooled drill bit according to claim 1, wherein: the tool handle (1) is provided with a plurality of branch holes (19), and the branch holes (19) are communicated with the vertical holes (12).