CN110744109A - Twist drill device and machining method thereof - Google Patents
Twist drill device and machining method thereof Download PDFInfo
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- CN110744109A CN110744109A CN201911045316.1A CN201911045316A CN110744109A CN 110744109 A CN110744109 A CN 110744109A CN 201911045316 A CN201911045316 A CN 201911045316A CN 110744109 A CN110744109 A CN 110744109A
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- twist drill
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- taper shank
- morse taper
- rod
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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
- B23B51/02—Twist drills
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
- B23B41/02—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor for boring deep holes; Trepanning, e.g. of gun or rifle barrels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
- B23P15/32—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools twist-drills
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Abstract
The invention discloses a twist drill device, comprising: the modified twist drill is formed by modifying the existing twist drill after the taper shank part is removed; the modified Morse taper shank is cut off from a waste drill bit with a first preset diameter and has a first preset length; the extension bar is provided with a second preset length, the diameter of the extension bar is the same as the maximum diameter of the modified Morse taper shank, one end of the extension bar is fixedly connected with the modified Morse taper shank, the other end of the extension bar is fixedly connected with the modified twist drill, and the axes of the extension bar, the modified Morse taper shank and the modified twist drill after connection are collinear. The twist drill device can process deep holes which can not be processed by standard twist drills and common lengthened twist drills, and has short manufacturing period and low cost. The invention also discloses a processing method for manufacturing the twist drill device, and the method has the advantages of short processing period and low cost.
Description
Technical Field
The invention relates to the technical field of machining cutters, in particular to a twist drill device. In addition, the invention also relates to a processing method for manufacturing the twist drill device.
Background
In the technical field of machine manufacturing and machine maintenance, deep hole machining is often used, for example, when a bolt connecting two or more parts is subjected to alternating loads for a long time and fatigue fracture occurs, especially when the fracture depth is deep, if the fractured bolt is to be taken out, a hole is usually drilled in the fractured bolt, and then a screw tap or other structural member is fixed with the fractured bolt through the drilled hole so as to take out the fractured bolt through reverse threading or other schemes.
In the prior art, a standard twist drill is usually adopted for deep hole machining, however, due to the limited length of the standard twist drill, when the drilling depth is far greater than that of the standard twist drill or the length of a common lengthened twist drill, the drill is not easy to drill, and at the moment, a special long drill needs to be additionally manufactured, and the machining period of the special long drill is long and the cost is high.
Therefore, how to provide a twist drill device to effectively solve the deep hole processing problem that both the standard twist drill and the common lengthened twist drill cannot be processed, and meanwhile, the processing period is short, and the cost is low, which is a problem to be solved urgently by those skilled in the art at present.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a twist drill device capable of machining deep holes that cannot be machined by both standard twist drills and generally extended twist drills, and having a short manufacturing cycle and low cost.
Another object of the present invention is to provide a method for manufacturing the above twist drill device, which can process deep holes that cannot be processed by standard twist drills and common lengthened twist drills, and has short processing period and low cost.
In order to achieve the above purpose, the invention provides the following technical scheme:
a twist drill device comprising:
the modified twist drill is formed by modifying the existing twist drill after the taper shank part is removed;
the modified Morse taper shank is cut off from a waste drill bit with a first preset diameter and has a first preset length;
the extension bar is provided with a second preset length, the diameter of the extension bar is the same as the maximum diameter of the modified Morse taper shank, one end of the extension bar is fixedly connected with the modified Morse taper shank, the other end of the extension bar is fixedly connected with the modified twist drill, and the axle centers of the extension bar, the modified Morse taper shank and the modified twist drill after connection are collinear.
Preferably, the extension bar is detachably and fixedly connected with the reformed twist drill, and the extension bar is welded and fixed with the reformed Morse taper shank.
Preferably, the extension bar orientation the one end of reforming the fluted drill is equipped with the internal thread hole, the one end of reforming the fluted drill be equipped with be used for with the external screw thread that the internal thread hole cooperation is connected.
Preferably, the extension bar is provided with a groove towards one end of the modified Morse taper shank, and one end of the modified Morse taper shank is provided with a boss matched with the groove for limiting.
A method for machining a twist drill device is applied to the twist drill device and comprises the following steps:
selecting the existing twist drill according to the actual drill demand condition;
sawing off a taper shank part of the conventional twist drill to obtain a working edge part;
placing the working edge part in a three-jaw chuck of a lathe, and turning the end face to obtain a modified twist drill of the twist drill device;
selecting a waste drill bit with a first preset diameter;
vertically sawing off the Morse taper shank part of the waste drill bit by using a sawing machine;
placing the Morse taper shank in the three-jaw chuck, enabling the three-jaw chuck to tightly clamp the maximum diameter part of the Morse taper shank, automatically aligning the center of the Morse taper shank, and turning the end face to obtain a modified Morse taper shank with a first preset length;
selecting a rod-shaped piece with preset strength, wherein the diameter of the rod-shaped piece is larger than the maximum diameter of the Morse taper shank, and the length of the rod-shaped piece is larger than a second preset length;
clamping the rod-shaped piece by using the three-jaw chuck, and turning end faces at two ends of the rod-shaped piece to enable the rod-shaped piece to have the second preset length;
clamping one end of the rod-shaped part by using the three-jaw chuck, tightly pushing the other end of the rod-shaped part by using the tip of the tail frame, and turning an outer circle to enable the diameter of the rod-shaped part to be the same as the maximum diameter of the Morse taper shank so as to obtain an extension rod of the twist drill device;
fixedly connecting one end of the extension bar with the modified Morse taper shank;
and fixedly connecting the other end of the extension bar with the reformed twist drill.
Preferably, after said turning the end face to obtain the modified twist drill of said twist drill device with said working edge portion placed in a three-jaw chuck of a lathe, further comprises:
clamping the modified twist drill by using the three-jaw chuck, and turning one end of the modified twist drill into an external thread;
after the end of the rod-shaped member is clamped by the three-jaw chuck, the other end of the rod-shaped member is tightly propped by the tip of the tail frame, and the outer circle is turned to make the diameter of the rod-shaped member the same as the maximum diameter of the Morse taper shank, the extension rod of the twist drill device is obtained, the extension rod further comprises:
turning around the extension bar;
installing a drill bit by using the tail frame, and drilling one end of the extension rod by using the drill bit;
and installing a screw tap by using the tailstock, and tapping the drilled hole by using the screw tap to form an internal thread hole which is matched and connected with the external thread.
Preferably, after the placing the morse taper shank in the three-jaw chuck, clamping the three-jaw chuck to the maximum diameter portion of the morse taper shank, automatically centering the morse taper shank, and turning the end face to obtain a modified morse taper shank with a first preset length, the method further comprises:
turning a round step at the large-diameter end of the modified Morse taper shank to form a boss with a second preset diameter, wherein the boss has a third preset length;
after the end of the rod-shaped member is clamped by the three-jaw chuck, the other end of the rod-shaped member is tightly propped by the tip of the tail frame, and the outer circle is turned to make the diameter of the rod-shaped member the same as the maximum diameter of the Morse taper shank, the extension rod of the twist drill device is obtained, the extension rod further comprises:
removing the tip;
the extension bar is used for extending into a machine tool towards one end of the modified twist drill, and the extension bar is clamped by the three-jaw chuck;
and the extension bar is used for facing one end of the modified Morse taper shank and is used for matching with the groove of the boss.
According to the modified twist drill device, the modified twist drill is modified from the existing twist drill in the market, and the twist drill is not required to be manufactured through special processing technologies such as a hot rolling twisting forming technology or a milling forming technology, so that the manufacturing period is short, and the processing efficiency is high; in addition, the modified Morse taper shank is formed by modifying a waste drill bit, so that the hardness requirement can be met, and the processing or purchasing cost can be reduced; and because the modified twist drill, the modified Morse taper shank and the extension rod are respectively and independently formed and then fixedly connected into an integral structure, the extension rod can have a proper second preset length according to the actual drilling depth requirement, so that the twist drill device can process deep holes which can not be processed by standard twist drills and common lengthened twist drills.
The machining method of the twist drill device provided by the invention is used for manufacturing the twist drill device and has the beneficial effects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural view of a twist drill device according to an embodiment of the present invention;
FIG. 2 is a front view of the modified Morse taper shank of FIG. 1;
FIG. 3 is a left side view of FIG. 2;
FIG. 4 is a longitudinal cross-sectional view of the extension bar of FIG. 1;
fig. 5 is a flow chart of a method of machining a twist drill device according to an embodiment of the present invention.
The reference numerals in fig. 1 to 4 are as follows:
1 is a modified twist drill, 11 is an external thread, 2 is a modified Morse taper shank, 21 is a boss, 3 is an extension bar, 31 is an internal thread hole, and 32 is a groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The core of the invention is to provide a twist drill device which can process deep holes which can not be processed by a standard twist drill and a common lengthened twist drill, and has short manufacturing period and low cost. The other core of the invention is to provide a processing method for manufacturing the twist drill device, which can realize the processing of deep holes which can not be processed by standard twist drills and common lengthened twist drills, and has short processing period and low cost.
Referring to fig. 1 to 4, fig. 1 is a schematic structural diagram of a twist drill device according to an embodiment of the present invention; FIG. 2 is a front view of the modified Morse taper shank of FIG. 1; FIG. 3 is a left side view of FIG. 2; fig. 4 is a longitudinal sectional view of the extension bar of fig. 1.
The invention provides a twist drill device which comprises a modified twist drill 1, a modified Morse taper shank 2 and an extension rod 3.
Specifically, the modified twist drill 1 is modified from an existing twist drill by removing a taper shank portion. The existing twist drill specifically refers to a finished product twist drill on the market, and drill bits of different models on the market can be selected to be modified according to different aperture requirements. That is, the conventional twist drill is removed from the taper shank portion and the working edge portion is left as a working portion when drilling the hole.
The modified morse taper shank 2 is formed by modifying a morse taper shank cut off from a waste drill bit, namely, after the waste drill bit is selected, the morse taper shank part of the waste drill bit is cut off from a waste drill bit body to be used as a taper shank part of the twist drill device.
Considering the convenience of installing the modified morse taper shank 2 when a deep hole is machined, the selected waste drill bit has a first preset diameter, for example, the waste drill bit with the diameter of phi 27mm to phi 31.5mm is selected, so that the modified morse taper shank 2 is a No. 4 morse taper shank, and the modified morse taper shank 2 is convenient to be matched with a drilling machine or a magnetic drill.
It will be appreciated that the modified morse taper shank 2 has a first predetermined length to meet the length requirement for the engagement of the modified morse taper shank 2 with a drill press or a magnetic drill.
The extension bar 3 is used for connecting the modified twist drill 1 and the modified morse taper shank 2 so as to realize the motion transmission between the modified morse taper shank 2 and the modified twist drill 1. Extension bar 3 has the second and predetermines length to satisfy the degree of depth demand of drilling, also, can make extension bar 3 have different length according to the drilling depth demand of difference, so that this twist drill device can process standard twist drill and the deep hole that general extension twist drill all can't process.
One end and the 2 fixed connection of system morse taper shank of transformation of extension bar 3, the other end and the 1 fixed connection of system of transformation of twist drill, also promptly, system of transformation of twist drill 1, system of transformation morse taper shank 2 and extension bar 3 respectively the independent shaping after, fixed connection structure as an organic whole again to form the machining tool who is used for processing the deep hole.
It should be noted that the diameter of the extension bar 3 is the same as the maximum diameter of the modified morse taper shank 2, so as to ensure the smooth transition of the connecting part of the modified morse taper shank 2 and the extension bar 3.
Further, the axes of the extension rod 3, the modified Morse taper shank 2 and the modified twist drill 1 after being connected are collinear, so that the drilling precision is ensured.
In addition, the invention does not limit the concrete connection mode between the modified twist drill 1 and the extension bar 3 and between the modified morse taper shank 2 and the extension bar 3, as long as the fixed connection between the modified twist drill 1 and the extension bar 3 and between the modified morse taper shank 2 and the extension bar 3 can be realized.
The specific material of the long extension bar 3 is not limited, and preferably, the long extension bar 3 is 45 round steel.
Therefore, the modified twist drill 1 of the twist drill device provided by the invention is modified from the existing twist drill in the market, and the twist drill is not required to be manufactured by special processing technologies such as a hot rolling twisting forming technology or a milling forming technology, so that the manufacturing period is short, and the processing efficiency is high; in addition, the modified Morse taper shank 2 is formed by modifying a waste drill bit, so that the hardness requirement can be met, and the processing or purchasing cost can be reduced; and because the modified twist drill 1, the modified Morse taper shank 2 and the extension bar 3 are respectively and independently formed and then fixedly connected into an integral structure, the extension bar 3 can have a proper second preset length according to the actual drilling depth requirement, so that the twist drill device can process deep holes which can not be processed by standard twist drills and common lengthened twist drills.
In view of the versatility of the twist drill device, in order to make the twist drill device meet different bore diameter requirements, on the basis of the above-mentioned embodiment, the extension bar 3 is detachably and fixedly connected with the modified twist drill 1, for example, the extension bar 3 is in threaded connection with the modified twist drill 1, so as to facilitate the replacement of different modified twist drills 1 according to actual conditions, thereby making the twist drill device adaptable to deep hole processing of different bore diameters.
Considering the connection mode of the extension bar 3 and the modified morse taper shank 2, on the basis of the above embodiment, the extension bar 3 and the modified morse taper shank 2 are welded and fixed to ensure the connection strength and the connection stability of the extension bar and the modified morse taper shank.
In view of the convenience of connecting the extension bar 3 with the modified twist drill 1, on the basis of the above-described embodiment, the extension bar 3 is provided with the internal thread hole 31 toward the end of the modified twist drill 1, and the end of the modified twist drill 1 is provided with the external thread 11 for fitting connection with the internal thread hole 31.
That is to say, this embodiment is connected through the screw-thread fit of external screw thread 11 with internal thread hole 31, realizes remaking the fluted drill 1 and being connected with extension bar 3, convenient assembling, practicality and strong adaptability.
In order to align the axis when the extension bar 3 is connected with the modified morse taper shank 2, on the basis of any one of the above embodiments, a groove 32 is provided at one end of the extension bar 3 facing the modified morse taper shank 2, and a boss 21 for cooperating with the groove 32 for limiting is provided at one end of the modified morse taper shank 2.
That is, the present embodiment realizes the alignment limit when the modified morse taper shank 2 is connected with the extension rod 3 by the matching of the boss 21 and the groove 32.
Fig. 5 is a flowchart illustrating a method of manufacturing a twist drill device according to an embodiment of the present invention.
In addition to the above twist drill device, the present invention also provides a machining method of manufacturing the twist drill device disclosed in the above embodiment, the machining method of the twist drill device including the steps of:
s11: and selecting the conventional twist drill according to the actual drill demand condition. The existing twist drill specifically refers to a finished product twist drill on the market.
S12: the taper shank part of the existing twist drill is sawed off to obtain a working edge part.
S13: and placing the working edge part in a three-jaw chuck of a lathe, and turning the end surface to obtain the modified twist drill of the twist drill device so as to ensure the flatness of the end surface of the modified twist drill.
S21: selecting a waste drill bit with a first preset diameter.
S22: and vertically sawing off the Morse taper shank part of the waste drill bit by using a sawing machine.
It should be noted that, when the morse taper shank portion of the waste drill bit is sawed, the length of the sawed morse taper shank portion needs to be greater than the first preset length so as to reserve a certain machining allowance.
S23: and placing the sawn Morse taper shank in a three-jaw chuck, enabling the three-jaw chuck to tightly clamp the maximum diameter part of the Morse taper shank, automatically aligning the center of the Morse taper shank, and turning the end face to obtain a modified Morse taper shank with a first preset length.
S31: and selecting a rod-shaped part with preset strength, wherein the diameter of the rod-shaped part is larger than the maximum diameter of the Morse taper shank, and the length of the rod-shaped part is larger than a second preset length so as to reserve certain machining allowance.
S32: and clamping the rod-shaped piece by using the three-jaw chuck, lathing the end surfaces at two ends of the rod-shaped piece, and enabling the rod-shaped piece to have a second preset length so as to enable the rod-shaped piece to have enough length to meet the requirement of drilling depth.
S33: and (3) clamping one end of the rod-shaped part by using the three-jaw chuck, jacking the other end of the rod-shaped part by using the tip of the tail frame, and turning the outer circle to ensure that the diameter of the rod-shaped part is the same as the maximum diameter of the Morse taper shank, thereby obtaining the extension rod of the twist drill device.
When the vehicle is rounded outward, the end of the rod-like member is chamfered, and the shaft end chamfer range includes C2 to C4.
S4: one end of the extension bar is fixedly connected with the modified Morse taper shank.
S5: and fixedly connecting the other end of the extension bar with the reformed twist drill.
That is, the method for processing the twist drill device provided by the invention comprises a method for processing a modified twist drill, a method for processing a modified morse taper shank, a method for processing an extension bar and a method for assembling the modified twist drill, the modified morse taper shank and the extension bar, namely, the modified twist drill, the modified morse taper shank and the extension bar are respectively and independently processed and then connected into a whole to form a processing tool for processing a deep hole.
Because the reformed twist drill is reformed by the existing twist drill in the market, compared with the prior art that the twist drill is manufactured by special processing techniques such as a hot rolling and twisting forming technique or a milling forming technique, the reformed twist drill has short manufacturing period and high processing efficiency; in addition, the modified Morse taper shank is formed by modifying a waste drill bit without special processing, so that the hardness requirement can be met, and the processing or purchasing cost can be reduced; and because the modified twist drill, the modified Morse taper shank and the extension rod are respectively and independently processed and then fixedly connected into an integral structure, the extension rod with a proper second preset length can be processed according to the actual drilling depth requirement, so that the twist drill device manufactured by the processing method can process deep holes which can not be processed by standard twist drills and common lengthened twist drills.
It should be noted that the respective processing sequences of the modified twist drill, the modified morse taper shank and the extension rod are not limited, and those skilled in the art can determine the appropriate processing sequence according to the actual situation.
It can be understood that, in the above-mentioned course of working, adopt three-jaw chuck to press from both sides tight to reform transform system fluted drill, reform transform morse taper shank and extension bar respectively, can carry out automatic centering to the work piece behind the tight work piece of three-jaw chuck clamp to can ensure the axle center collineation after reform transform system fluted drill, reform transform morse taper shank and the extension bar three connect, in order to guarantee drilling accuracy.
In order to facilitate the connection of the modified twist drill and the extension bar, on the basis of the above embodiment, after the working edge portion is placed in a three-jaw chuck of a lathe and the end face is turned to obtain the modified twist drill of the twist drill device, the method further comprises:
and clamping the modified twist drill by using the three-jaw chuck, and turning one end of the modified twist drill into an external thread.
Utilize the one end of three-jaw chuck clamping rod-like spare, utilize the top of tailstock to push up the other end of rod-like spare, the turning round makes the diameter of rod-like spare the same with the maximum diameter of morse taper shank, after obtaining the extension bar of twist drill device, still includes:
turning the extension bar around.
And a drill bit is installed by utilizing the tailstock, and one end of the long rod is butted by utilizing the drill bit to drill.
And installing a screw tap by using the tailstock, and tapping the drilled hole by using the screw tap to form an internal thread hole which is matched and connected with the external thread of the reformed twist drill.
That is, the modified twist drill in this embodiment is connected with the extension bar by screw-fitting.
On the basis of any one of the above embodiments, after the morse taper shank is placed in the three-jaw chuck, the three-jaw chuck clamps the maximum diameter portion of the morse taper shank, the center of the morse taper shank is automatically aligned, and the end surface is turned to obtain a modified morse taper shank with a first preset length, the method further comprises the following steps:
and (3) turning a round step on the large-diameter end of the modified Morse taper shank to form a boss with a second preset diameter, wherein the boss has a third preset length.
Utilize the one end of three-jaw chuck clamping rod-like spare, utilize the top of tailstock to push up the other end of rod-like spare, the turning round makes the diameter of rod-like spare the same with the maximum diameter of morse taper shank, after obtaining the extension bar of twist drill device, still includes:
the tip is removed.
The extension bar is used for extending into a machine tool towards one end of the reformed twist drill, and the extension bar is clamped by the three-jaw chuck.
The butt joint stock is used for turning the recess towards one end of reforming Morse taper shank, and the internal diameter of recess is the same with the diameter of boss, and the degree of depth of recess is the same with the length of boss to make recess and boss cooperation, spacing when realizing reforming Morse taper shank and extension bar and being connected.
That is to say, the modified morse taper shank and the extension rod in the embodiment are limited by the matching of the boss and the groove, and preferably, the modified morse taper shank is welded with the extension rod.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The twist drill device and the method of manufacturing the twist drill device according to the present invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (7)
1. A twist drill device, comprising:
a modified twist drill (1) which is modified by removing the taper shank part of the existing twist drill;
the modified Morse taper shank (2) is cut off from a waste drill bit with a first preset diameter, and the modified Morse taper shank (2) has a first preset length;
extension bar (3) with length is predetermine to the second, the diameter of extension bar (3) with the maximum diameter of reforming system morse taper shank (2) is the same, the one end of extension bar (3) with reform system morse taper shank (2) fixed connection, the other end with reform system fluted drill (1) fixed connection, extension bar (3) reform system morse taper shank (2) with reform system fluted drill (1) axle center collineation after the three is connected.
2. A twist drill device according to claim 1, characterized in that the extension bar (3) is detachably and fixedly connected with the modified twist drill (1), and the extension bar (3) is fixedly welded with the modified morse taper shank (2).
3. A twist drill device according to claim 2, characterized in that the extension bar (3) is provided with an internally threaded hole (31) towards the end of the modified twist drill (1), and that the end of the modified twist drill (1) is provided with an external thread (11) for cooperating connection with the internally threaded hole (31).
4. A twist drill device according to any one of claims 1-3, characterized in that the extension bar (3) is provided with a recess (32) at its end facing the modified morse shank (2), and that the modified morse shank (2) is provided with a boss (21) at its end for co-location with the recess (32).
5. A method of machining a twist drill device, applied to the twist drill device of claim 1, comprising:
selecting the existing twist drill according to the actual drill demand condition;
sawing off a taper shank part of the conventional twist drill to obtain a working edge part;
placing the working edge part in a three-jaw chuck of a lathe, and turning the end face to obtain a modified twist drill of the twist drill device;
selecting a waste drill bit with a first preset diameter;
vertically sawing off the Morse taper shank part of the waste drill bit by using a sawing machine;
placing the Morse taper shank in the three-jaw chuck, enabling the three-jaw chuck to tightly clamp the maximum diameter part of the Morse taper shank, automatically aligning the center of the Morse taper shank, and turning the end face to obtain a modified Morse taper shank with a first preset length;
selecting a rod-shaped piece with preset strength, wherein the diameter of the rod-shaped piece is larger than the maximum diameter of the Morse taper shank, and the length of the rod-shaped piece is larger than a second preset length;
clamping the rod-shaped piece by using the three-jaw chuck, and turning end faces at two ends of the rod-shaped piece to enable the rod-shaped piece to have the second preset length;
clamping one end of the rod-shaped part by using the three-jaw chuck, tightly pushing the other end of the rod-shaped part by using the tip of the tail frame, and turning an outer circle to enable the diameter of the rod-shaped part to be the same as the maximum diameter of the Morse taper shank so as to obtain an extension rod of the twist drill device;
fixedly connecting one end of the extension bar with the modified Morse taper shank;
and fixedly connecting the other end of the extension bar with the reformed twist drill.
6. The method of claim 5, further comprising, after said placing said working edge portion in a three-jaw chuck of a lathe and facing to obtain a modified twist drill of said twist drill assembly:
clamping the modified twist drill by using the three-jaw chuck, and turning one end of the modified twist drill into an external thread;
after the end of the rod-shaped member is clamped by the three-jaw chuck, the other end of the rod-shaped member is tightly propped by the tip of the tail frame, and the outer circle is turned to make the diameter of the rod-shaped member the same as the maximum diameter of the Morse taper shank, the extension rod of the twist drill device is obtained, the extension rod further comprises:
turning around the extension bar;
installing a drill bit by using the tail frame, and drilling one end of the extension rod by using the drill bit;
and installing a screw tap by using the tailstock, and tapping the drilled hole by using the screw tap to form an internal thread hole which is matched and connected with the external thread.
7. A method of making a twist drill assembly according to claim 5 or 6, wherein after said positioning of the Morse taper shank in the three-jaw chuck, clamping the three-jaw chuck against the largest diameter portion of the Morse taper shank, automatically centering the Morse taper shank, and turning the end face to obtain a modified Morse taper shank having a first predetermined length, further comprises:
turning a round step at the large-diameter end of the modified Morse taper shank to form a boss with a second preset diameter, wherein the boss has a third preset length;
after the end of the rod-shaped member is clamped by the three-jaw chuck, the other end of the rod-shaped member is tightly propped by the tip of the tail frame, and the outer circle is turned to make the diameter of the rod-shaped member the same as the maximum diameter of the Morse taper shank, the extension rod of the twist drill device is obtained, the extension rod further comprises:
removing the tip;
the extension bar is used for extending into a machine tool towards one end of the modified twist drill, and the extension bar is clamped by the three-jaw chuck;
and the extension bar is used for facing one end of the modified Morse taper shank and is used for matching with the groove of the boss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911045316.1A CN110744109A (en) | 2019-10-30 | 2019-10-30 | Twist drill device and machining method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911045316.1A CN110744109A (en) | 2019-10-30 | 2019-10-30 | Twist drill device and machining method thereof |
Publications (1)
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| CN110744109A true CN110744109A (en) | 2020-02-04 |
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| CN201911045316.1A Pending CN110744109A (en) | 2019-10-30 | 2019-10-30 | Twist drill device and machining method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202224710U (en) * | 2011-10-19 | 2012-05-23 | 哈尔滨汽轮机厂有限责任公司 | Mechanically-clamped lengthened center drill |
| CN102744561A (en) * | 2012-07-21 | 2012-10-24 | 西安煤矿机械有限公司 | Deep hole machining process |
| CN202921985U (en) * | 2012-08-28 | 2013-05-08 | 安瑞科(蚌埠)压缩机有限公司 | Deep hole lengthened drill extension rod |
| CN204470665U (en) * | 2015-03-15 | 2015-07-15 | 瑞驰精机邯郸有限公司 | A kind of lengthening fluted drill |
| US20160311037A1 (en) * | 2015-04-24 | 2016-10-27 | Heule Werkzeug Ag | Combined drill and chamfer tool |
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2019
- 2019-10-30 CN CN201911045316.1A patent/CN110744109A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202224710U (en) * | 2011-10-19 | 2012-05-23 | 哈尔滨汽轮机厂有限责任公司 | Mechanically-clamped lengthened center drill |
| CN102744561A (en) * | 2012-07-21 | 2012-10-24 | 西安煤矿机械有限公司 | Deep hole machining process |
| CN202921985U (en) * | 2012-08-28 | 2013-05-08 | 安瑞科(蚌埠)压缩机有限公司 | Deep hole lengthened drill extension rod |
| CN204470665U (en) * | 2015-03-15 | 2015-07-15 | 瑞驰精机邯郸有限公司 | A kind of lengthening fluted drill |
| US20160311037A1 (en) * | 2015-04-24 | 2016-10-27 | Heule Werkzeug Ag | Combined drill and chamfer tool |
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