CN214977985U - External cooling changes internal cooling drill bit joint frock - Google Patents
External cooling changes internal cooling drill bit joint frock Download PDFInfo
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- CN214977985U CN214977985U CN202121235051.4U CN202121235051U CN214977985U CN 214977985 U CN214977985 U CN 214977985U CN 202121235051 U CN202121235051 U CN 202121235051U CN 214977985 U CN214977985 U CN 214977985U
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Abstract
The utility model discloses an external cooling rotary internal cooling drill bit clamping tool, which comprises a drill sleeve and a drill spindle, wherein the drill sleeve is provided with a water supply hole communicated with the inner cylindrical surface and the outer cylindrical surface of the drill sleeve; when drilling, the cooling medium enters the upper part of the drill bit hole after sequentially passing through the water supply hole, the water tank, the water inlet hole and the water outlet hole, and then flows into the cutting edge of the drill bit from the cooling hole at the handle of the internal cooling drill bit, so that the aim of discharging metal chips by cooling the drill bit is fulfilled; the utility model provides an ordinary rig or drilling machine can't carry out the problem of interior cooling bit BTA among the prior art, consequently the utility model discloses carrying out ordinary rig drilling machine BTA, the cost is cheaper when guaranteeing the cutting effect.
Description
Technical Field
The utility model relates to the technical field of machining, especially, relate to an external cooling changes interior cooling drill bit joint frock.
Background
An internal cooling drill bit is a machining tool, which has 1 to 2 through holes from a shank part to a cutting edge, passes compressed air, oil or cutting fluid, and serves to cool a tool and a workpiece and flush away chips, and is particularly suitable for deep hole machining. However, the internal cooling drill bit is usually equipped with a special internal cooling drill or drilling machine, while the ordinary drill or drilling machine cannot normally perform internal cooling even if the internal cooling drill bit is clamped, and the special internal cooling drill or drilling machine is usually expensive.
How to clamp an existing common drilling machine or a drilling machine and use an internal cooling drill bit to perform normal internal cooling drilling is always concerned by vast small and medium-sized factory enterprises.
SUMMERY OF THE UTILITY MODEL
The utility model provides an external cooling rotary internal cooling drill bit clamping tool, which comprises a drill bushing 1 and a drill shaft 2, wherein the drill bushing 1 is in a cylindrical structure, the drill shaft 2 is in a two-stage concentric step shaft structure, the water-cooled drill sleeve consists of a first step shaft 3 and a second step shaft 4 which is fixedly integrated with the first step shaft 3 into a whole, wherein the outer cylindrical surface of the first step shaft 3 is provided with a first taper 5 which gradually increases from top to bottom, the lower end surface of the second step shaft 4 is provided with an inwards concave drill bit hole 6 which is coaxial with a drill shaft 2, the inner cylindrical surface of the drill bit hole 6 is provided with a second taper 7 which gradually increases from top to bottom, a water outlet hole 8 which is coaxial with the drill shaft 2 is communicated above the drill bit hole 6, the water outlet hole 8 is communicated to the outer circumferential surface of the second step shaft 4 through a transverse water inlet hole 9, the outer circumferential surface of the second step shaft 4 is provided with an annular inwards concave water tank 10 which is coaxial with the drill shaft 2, and the drill sleeve 1 is provided with a water supply hole 11 which is communicated with the inner cylindrical surface and the outer cylindrical surface of the drill sleeve 1; the first taper 5 is the same as the installation taper of the ram of the drilling machine, and the second taper 7 is the same as the installation taper of the internal cooling drill bit 12; the inner cylindrical surface of the drill bushing 1 is rotatably connected with the outer cylindrical surface of the second stepped shaft 4 through a bearing 23, and after the drill bushing 1 is rotatably connected with the second stepped shaft 4, the water tank 10 is communicated with the water supply hole 11 and the water inlet hole 9; when drilling, the first taper 5 is matched with the mounting hole of the ram of the drilling machine in a taper manner to clamp the drill shaft 2 to rotate, a cooling medium sequentially passes through the water supply hole 11, the water tank 10, the water inlet hole 9 and the water outlet hole 8 and then enters the upper part of the drill hole 6, and then flows into the cutting edge of the drill from the cooling hole at the handle rod of the inner cooling drill 12, so that the purpose of cooling the drill edge and discharging metal chips is achieved; in the drilling process, no matter where the water inlet hole 9 rotates, water in the annular water tank 10 always enters the water inlet hole 9, and real-time smoothness of a water channel in the drilling process is guaranteed.
Preferably, the water supply hole 11 is provided with a water inlet nozzle 13 at the position of the outer cylindrical surface of the drill bushing 1, and the water inlet nozzle 13 is used for connecting an external water pipe connector, so that an external pressure cooling medium can conveniently enter the tool.
Preferably, the outer cylindrical surface of the drill bushing 1 is provided with a fixing part for fastening and connecting the positioning lug 14 with a drilling machine, and the fixing position of the drill bushing 1 and the drilling machine is fastened and connected through the positioning lug 14 during drilling, so that the drill bushing 1 cannot rotate at a low speed along with the drill shaft 2 during drilling.
Preferably, the tool is further provided with a cylindrical adapter sleeve 15, the lower end face of the adapter sleeve 15 is provided with a concave inner taper hole 16 coaxial with the adapter sleeve 15, the taper of the inner taper hole 16 gradually increases from top to bottom, the taper of the inner taper hole 16 is the same as the first taper 5, and the outer cylindrical surface of the adapter sleeve 15 is provided with anti-skid grains 17; the inner taper hole 16 of the adapter sleeve 15 is matched with the first taper 5 of the first step shaft 3, and when the drilling machine or the drilling machine is in an old-fashioned jaw type fastening mode, the adapter sleeve 15 is tightly grasped by a chuck so as to clamp the drilling shaft 2 for drilling.
Preferably, the joint of the drill bushing 1 and the second stepped shaft 4 is further provided with an annular upper sealing ring 18 and an annular lower sealing ring 19, the upper sealing ring 18 is higher than the highest position of the water tank 10 and the water supply hole 11, the lower sealing ring 19 is lower than the lowest position of the water tank 10 and the water supply hole 11, the outer rings of the upper sealing ring 18 and the lower sealing ring 19 are in sealing connection with the inner cylindrical surface of the drill bushing 1, and the inner rings of the upper sealing ring 18 and the lower sealing ring 19 are in sealing connection with the outer cylindrical surface of the second stepped shaft 4; the upper sealing ring 18 and the lower sealing ring 19 further block the cooling medium between the inner cylindrical surface of the drill sleeve 1 and the outer cylindrical surface of the drill shaft 2, and only the cooling medium can enter from the water supply hole 11 and be discharged from the water tank 10, so that better pressure transmission to the cutting edge of the inner cooling drill bit 12 after the cooling medium is pressurized is ensured.
Preferably, an annular retainer ring 20 is further arranged at the lowermost end of the joint of the drill bushing 1 and the second step shaft 4, and the retainer ring 20 plays a role of blocking the bearing 23 and simultaneously prevents metal chips which are scattered during cutting from being splashed into the tool.
Preferably, the tool is further provided with an annular pressure increasing ring 21, a plurality of spiral blades 22 are fixedly connected to the inner ring of the pressure increasing ring 21, the outer ring of the pressure increasing ring 21 is fixedly connected to the water outlet of the water outlet hole 8, when the drill spindle 2 drives the internal cooling drill bit 12 to cut, the blades 22 and the drill spindle 2 synchronously rotate and apply downward thrust to cooling water in the water outlet hole 8, the pressure increasing ring 21 can increase the pressure of the cooling medium at the internal cooling drill bit 12 when the drill spindle 2 rotates at the high speed, and the purpose of discharging metal chips and the cooling medium can be achieved by providing enough pressure for the cutting part even if the pressure at the water inlet nozzle is insufficient.
The utility model has the advantages that:
the utility model is connected with the drill spindle bearing through the drill bushing, a water supply hole is arranged on the side wall of the drill bushing, a water outlet hole is arranged at the end of the drill spindle connected with the drill bit, a water inlet hole is arranged on the side wall of the drill spindle, the water inlet hole is communicated with the water outlet hole, and an annular concave water tank is arranged on the outer circumference of the drill spindle; consequently, after drill bushing and drill spindle are connected, basin intercommunication feed water hole and apopore for the inlet opening can be at any time when with the drill spindle synchronous revolution through the basin with the coolant liquid transmission in the feed water hole to apopore then deliver to drill bit cutting edge department through the terminal coolant liquid hole of drill bit handle pole and reach the effect of cooling drill bit discharge metal piece, consequently, the utility model discloses it also can realize the drilling mode of external cooling commentaries on classics internal cooling simultaneously to have satisfied ordinary drilling machine rig, and the cost is cheaper in the time of guaranteeing the cutting effect moreover.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments of the present invention or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a cross-sectional view of an external cooling rotary internal cooling drill bit clamping tool;
FIG. 2 is an exploded view;
FIG. 3 is a sectional view taken along line A-A of FIG. 1;
FIG. 4 is a cross-sectional view of an adaptor sleeve;
FIG. 5 is a cross-sectional view of a drill sleeve;
FIG. 6 is a cross-sectional view of the drill shaft;
figure 7 is a top view of the booster ring.
In the figure, 1, a drill bushing; 2. a drill shaft; 3. a first step shaft; 4. a second step shaft; 5. a first taper; 6. drilling a bit hole; 7. a second taper; 8. a water outlet hole; 9. a water inlet hole; 10. a water tank; 11. a water supply hole; 12. cooling the drill bit internally; 13. a water inlet nozzle; 14. positioning the ear; 15. a transfer sleeve; 16. an inner taper hole; 17. anti-skid lines; 18. an upper sealing ring; 19. a lower seal ring; 20. a retainer ring; 21. a pressurizing ring; 22. a blade; 23. and a bearing.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.
As shown in figures 1-7, the utility model provides an external cooling rotary internal cooling drill bit clamping tool, which comprises a drill sleeve 1 and a drill spindle 2, wherein the drill sleeve 1 is in a cylindrical structure, the drill spindle 2 is in a two-stage concentric stepped spindle structure, namely, the tool is composed of a first stepped spindle 3 and a second stepped spindle 4 which is fixedly integrated with the first stepped spindle 3, the outer cylindrical surface of the first stepped spindle 3 is provided with a first taper 5 which gradually increases from top to bottom, the lower end surface of the second stepped spindle 4 is provided with an inwards concave drill bit hole 6 which is coaxial with the drill spindle 2, the inner cylindrical surface of the drill bit hole 6 is provided with a second taper 7 which gradually increases from top to bottom, the upper part of the drill bit hole 6 is also communicated with a water outlet hole 8 which is coaxial with the drill spindle 2, the water outlet hole 8 is communicated with the outer cylindrical surface of the second stepped spindle 4 through a transverse water inlet hole 9, the outer circumferential surface of the second stepped spindle 4 is provided with an annular water groove 10 which is coaxial with the drill spindle 2, the drill bushing 1 is provided with a water supply hole 11 which is communicated with the inner cylindrical surface and the outer cylindrical surface of the drill bushing 1; the first taper 5 is the same as the installation taper of the ram of the drilling machine, and the second taper 7 is the same as the installation taper of the internal cooling drill bit 12; the inner cylindrical surface of the drill bushing 1 is rotatably connected with the outer cylindrical surface of the second stepped shaft 4 through a bearing 23, and after the drill bushing 1 is rotatably connected with the second stepped shaft 4, the water tank 10 is communicated with the water supply hole 11 and the water inlet hole 9; when drilling, the first taper 5 is matched with the mounting hole of the ram of the drilling machine in a taper manner to clamp the drill shaft 2 to rotate, a cooling medium sequentially passes through the water supply hole 11, the water tank 10, the water inlet hole 9 and the water outlet hole 8 and then enters the upper part of the drill hole 6, and then flows into the cutting edge of the drill from the cooling hole at the handle rod of the inner cooling drill 12, so that the purpose of cooling the drill edge and discharging metal chips is achieved; in the drilling process, no matter where the water inlet hole 9 rotates, water in the annular water tank 10 always enters the water inlet hole 9, and real-time smoothness of a water channel in the drilling process is guaranteed.
Furthermore, the position of the water supply hole 11 on the outer cylindrical surface of the drill bushing 1 is provided with a water inlet nozzle 13, and the water inlet nozzle 13 is used for connecting an external water pipe connector, so that external pressure cooling media can conveniently enter the tool.
Furthermore, the outer cylindrical surface of the drill bushing 1 is provided with a fixing part for fastening and connecting the positioning lug 14 with the drilling machine, and the fixing position of the drill bushing 1 and the drilling machine is fastened and connected through the positioning lug 14 during drilling, so that the drill bushing 1 cannot rotate at a low speed along with the drill shaft 2 during drilling.
Further, the tool is also provided with a cylindrical adapter sleeve 15, the lower end face of the adapter sleeve 15 is provided with a concave inner taper hole 16 coaxial with the adapter sleeve 15, the taper of the inner taper hole 16 gradually increases from top to bottom, the taper of the inner taper hole 16 is the same as the first taper 5, and the outer cylindrical surface of the adapter sleeve 15 is provided with anti-skid grains 17; the inner taper hole 16 of the adapter sleeve 15 is matched with the first taper 5 of the first step shaft 3, and when the drilling machine or the drilling machine is in an old-fashioned jaw type fastening mode, the adapter sleeve 15 is tightly grasped by a chuck so as to clamp the drilling shaft 2 for drilling.
Further, the joint of the drill bushing 1 and the second stepped shaft 4 is further provided with an annular upper sealing ring 18 and an annular lower sealing ring 19, the upper sealing ring 18 is higher than the highest position of the water tank 10 and the water supply hole 11, the lower sealing ring 19 is lower than the lowest position of the water tank 10 and the water supply hole 11, the outer rings of the upper sealing ring 18 and the lower sealing ring 19 are hermetically connected with the inner cylindrical surface of the drill bushing 1, and the inner rings of the upper sealing ring 18 and the lower sealing ring 19 are hermetically connected with the outer cylindrical surface of the second stepped shaft 4; the upper sealing ring 18 and the lower sealing ring 19 further block the cooling medium between the inner cylindrical surface of the drill sleeve 1 and the outer cylindrical surface of the drill shaft 2, and only the cooling medium can enter from the water supply hole 11 and be discharged from the water tank 10, so that better pressure transmission to the cutting edge of the inner cooling drill bit 12 after the cooling medium is pressurized is ensured.
Furthermore, the bottommost end of the joint of the drill bushing 1 and the second step shaft 4 is also provided with an annular retainer ring 20, and the retainer ring 20 plays a role of blocking the bearing 23 and simultaneously prevents metal chips which are scattered during cutting from being sputtered into the tool.
Further, the tool is further provided with an annular pressure increasing ring 21, a plurality of spiral blades 22 are fixedly connected to the inner ring of the pressure increasing ring 21, the outer ring of the pressure increasing ring 21 is fixedly connected with a water outlet of the water outlet hole 8, when the drill spindle 2 drives the internal cooling drill bit 12 to cut, the blades 22 and the drill spindle 2 synchronously rotate and apply downward thrust to cooling water in the water outlet hole 8, the pressure increasing ring 21 can increase the pressure of the cooling medium at the internal cooling drill bit 12 when the drill spindle 2 rotates at the high speed, and the purpose of discharging metal chips and the cooling medium can be achieved by providing enough pressure for the cutting part even if the pressure at the water inlet nozzle is insufficient.
To sum up, the utility model relates to an external cooling changes interior cooling drill bit joint frock has solved among the prior art problem that ordinary rig or drilling machine can't carry out interior cooling drill bit BTA, has realized increasing the target that cooling medium input can carry out the processing in the deep hole at ordinary rig or drilling machine, consequently the utility model discloses possess extensive application prospect.
The embodiments in the present specification are described in a progressive manner, and the same or similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.
The above embodiments are only used to illustrate the technical solution of the present invention, but not to limit the present invention; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the present invention.
Claims (7)
1. The clamping tool for the external cooling rotary internal cooling drill bit is characterized by comprising a drill sleeve (1) and a drill shaft (2), wherein the drill sleeve (1) is of a cylindrical structure, the drill shaft (2) is of a two-stage concentric stepped shaft structure and is formed by a first stepped shaft (3) and a second stepped shaft (4) which is fixedly integrated with the first stepped shaft (3), a first taper (5) which gradually increases from top to bottom is arranged on the outer cylindrical surface of the first stepped shaft (3), an inwards concave drill bit hole (6) which is coaxial with the drill shaft (2) is arranged on the lower end surface of the second stepped shaft (4), a second taper (7) which gradually increases from top to bottom is arranged on the inner cylindrical surface of the drill bit hole (6), a water outlet hole (8) which is coaxial with the drill shaft (2) is communicated above the drill bit hole (6), and the water outlet hole (8) is communicated to the outer circumferential surface of the second stepped shaft (4) through a transverse water inlet hole (9), an annular inwards concave water tank (10) which is coaxial with the drill shaft (2) is arranged on the outer circumferential surface of the second step shaft (4), and a water supply hole (11) which is communicated with the inner cylindrical surface and the outer cylindrical surface of the drill sleeve (1) is formed in the drill sleeve (1); the first taper (5) is the same as the installation taper of the ram of the drilling machine, and the second taper (7) is the same as the installation taper of the internal cooling drill bit (12);
the inner cylindrical surface of the drill sleeve (1) is rotatably connected with the outer cylindrical surface of the second step shaft (4) through a bearing (23), and after the drill sleeve (1) is rotatably connected with the second step shaft (4), the water tank (10) is communicated with the water supply hole (11) and the water inlet hole (9).
2. The external cooling rotary internal cooling drill bit clamping tool according to claim 1, wherein a water inlet nozzle (13) is arranged at the position, located on the outer cylindrical surface of the drill sleeve (1), of the water supply hole (11).
3. The clamping tool for the external cooling rotary internal cooling drill bit according to claim 1, wherein a fixing part for fastening and connecting the drilling machine is provided with a positioning lug (14) on the outer cylindrical surface of the drill bushing (1).
4. The external cooling rotary internal cooling drill bit clamping tool according to claim 1, wherein the tool is further provided with a cylindrical adapter sleeve (15), an inner concave inner taper hole (16) coaxial with the adapter sleeve (15) is formed in the lower end face of the adapter sleeve (15), the taper of the inner taper hole (16) gradually increases from top to bottom, the taper of the inner taper hole (16) is the same as the first taper (5), and anti-skid threads (17) are formed in the outer cylindrical surface of the adapter sleeve (15).
5. The external cooling internal cooling rotary drill bit clamping tool according to claim 1, wherein a circular upper sealing ring (18) and a circular lower sealing ring (19) are further arranged at the joint of the drill bushing (1) and the second step shaft (4), the upper sealing ring (18) is higher than the highest position of the water tank (10) and the water supply hole (11), the lower sealing ring (19) is lower than the lowest position of the water tank (10) and the water supply hole (11), the outer rings of the upper sealing ring (18) and the lower sealing ring (19) are connected with the inner cylindrical surface of the drill bushing (1) in a sealing manner, and the inner rings of the upper sealing ring (18) and the lower sealing ring (19) are connected with the outer cylindrical surface of the second step shaft (4) in a sealing manner.
6. The external cooling rotary internal cooling drill bit clamping tool according to claim 1, wherein an annular retainer ring (20) is further arranged at the bottommost end of the joint of the drill bushing (1) and the second step shaft (4).
7. The tooling of claim 1, further comprising an annular pressure ring (21), wherein a plurality of spiral blades (22) are fixedly connected to the inner ring of the pressure ring (21), the outer ring of the pressure ring (21) is fixedly connected to the water outlet of the water outlet (8), and when the drill spindle (2) drives the internal cooling drill bit (12) to cut, the blades (22) and the drill spindle (2) synchronously rotate and apply downward thrust to cooling water in the water outlet (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121235051.4U CN214977985U (en) | 2021-06-03 | 2021-06-03 | External cooling changes internal cooling drill bit joint frock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121235051.4U CN214977985U (en) | 2021-06-03 | 2021-06-03 | External cooling changes internal cooling drill bit joint frock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214977985U true CN214977985U (en) | 2021-12-03 |
Family
ID=79086386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121235051.4U Active CN214977985U (en) | 2021-06-03 | 2021-06-03 | External cooling changes internal cooling drill bit joint frock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214977985U (en) |
-
2021
- 2021-06-03 CN CN202121235051.4U patent/CN214977985U/en active Active
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