CN209736718U - jacking coring tool - Google Patents

jacking coring tool Download PDF

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Publication number
CN209736718U
CN209736718U CN201920423744.2U CN201920423744U CN209736718U CN 209736718 U CN209736718 U CN 209736718U CN 201920423744 U CN201920423744 U CN 201920423744U CN 209736718 U CN209736718 U CN 209736718U
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CN
China
Prior art keywords
blade
cutter body
hole
coring
trepanning
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Active
Application number
CN201920423744.2U
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Chinese (zh)
Inventor
何振虎
朱永胜
何琳虎
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Ostersund Tool (changxin) Technology Co Ltd
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Ostersund Tool (changxin) Technology Co Ltd
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Priority to CN201920423744.2U priority Critical patent/CN209736718U/en
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Publication of CN209736718U publication Critical patent/CN209736718U/en
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Abstract

the utility model relates to a jacking coring tool, including the cutter body, set up the coring hole that extends along the axis direction of cutter body on the terminal surface of cutter body tip, the tip of cutter body is rotatable to be provided with two at least blades at the side of coring hole, the face that the blade of blade is located and the axis of cutter body are on the coplanar, the distance between the tip portion of blade and the rotation axle center of blade is L1, the perpendicular distance from rotation axle center to cutter body axis is L2, and L1 > L2; the blade comprises a blade head part and a blade tail part, and the cutting edges comprise an outer cutting edge arranged on the outer side edge of the blade head part and an inner cutting edge arranged on the inner side edge of the blade head part; the blade rotates and simultaneously performs the composite motion of axial feeding and circumferential feeding to cut the core material of the workpiece; the utility model overcomes cutting inefficiency in the core material cutting process, cutting stability is poor, and the blade damages the problem that life is short easily.

Description

jacking coring tool
Technical Field
The utility model relates to a metal cutting processing technology field especially relates to a core cutter is got to jacking.
background
trepanning drills have been widely used in the field of machining and have many advantages over conventional drill bits: the trepanning drill can save materials, leave the core, reduce the power consumption of the machine tool and the like.
Although trepanning drills have many advantages, when a part hole to be machined is a blind hole and cannot be drilled through integrally, a common trepanning drill cannot drill through a workpiece to achieve the effect of directly drilling a large hole, and the large hole which cannot be drilled through by a normal trepanning drill needs to be drilled through by a small drill bit and a boring cutter slowly or by a solid drill bit, so that the machining efficiency is greatly reduced, and the requirement on the power of a machine tool is higher.
The utility model discloses a chinese utility model patent that the bulletin number of granting is CN203316797U discloses the jacking bores, including jacking bores subassembly and handle of a knife subassembly two parts, simple structure, when the entity of processing large aperture, the quantity of the traditional cutter of chooseing for use reduces, and the time of changing the cutter also reduces, has improved machining efficiency, uses the jacking to bore, and the core that the jacking that falls into in the cutter body hole left can continue to use material saving.
However, it has the following problems: when the large blind hole is machined on a part, the machining purpose cannot be achieved independently, and the machining tool is only suitable for machining a through hole.
SUMMERY OF THE UTILITY MODEL
The utility model aims at prior art's weak point, provide a core cutter is got to jacking, through setting up two blades on the cutter body to the blade that sets up the blade includes and becomes certain angle between outer blade and interior blade and the two blades, has overcome cutting inefficiency in the core material cutting process, and cutting stability is poor, and the blade damages the problem that life is short easily.
In order to achieve the above object, the utility model provides a following technical scheme:
A core cutter for trepanning comprises a cutter body, wherein a core hole extending along the axis direction of the cutter body is formed in the end face of the end portion of the cutter body, at least two blades are rotatably arranged at the side edge of the core hole at the end portion of the cutter body, the surface where the cutting edges of the blades are located and the axis of the cutter body are on the same plane, the distance from the tip portions of the cutting edges to the rotating axis center of the blades is L1, the vertical distance from the rotating axis center to the axis of the cutter body is L2, and L1 is greater than L2; the blade comprises a blade head part and a blade tail part, and the cutting edges comprise an outer cutting edge arranged on the outer side edge of the blade head part and an inner cutting edge arranged on the inner side edge of the blade head part;
And the blade rotates and simultaneously performs the composite motion of axial feeding and circumferential feeding to finish cutting the core material of the workpiece.
Preferably, the blade is arc-shaped, the outer side of the nose portion of the blade is arc-shaped, and the angle between the outer edge and the inner edge is a1, and 75 ° < a1<85 °, preferably 80 °, at which the cutting feed of the blade is smoother, the service life of the blade is longer and the load on the lathe is smaller.
Preferably, the maximum distance from the blade to the axis of the cutter body is L3, the radius of the machining hole of the workpiece is r, and L3< r.
Preferably, the coring hole is coaxial with the cutter body, the radius of the coring hole is r1, the minimum distance from the blade to the axis of the cutter body is L4, and L4 is more than or equal to r 1.
Preferably, the blades are arranged in an array along the circumferential direction of the cutter body.
Preferably, the end of the cutter body is provided with a blade groove and a positioning pin hole penetrating through the blade groove, a positioning pin is arranged in the positioning pin hole, and the blade is rotatably arranged in the blade groove through the positioning pin.
preferably, the front end of the cutter body is further provided with a locking screw hole, a locking screw is arranged in the locking screw hole, and the positioning pin is fixed in the positioning pin hole through the locking screw.
as a further preference, the tip portion is provided with a round corner, the round corner radius is r2, and 0.7 < r2 ≦ 0.8, preferably 0.8.
The beneficial effects of this embodiment:
1. The utility model discloses in through setting up two blades on the cutter body, improved the machining efficiency who carries out the cutting to the core material greatly to the blade that sets up the blade includes that outer blade and interior blade and two become certain angle between the blade, has reduced the resistance that the blade cutting circumference fed, has reduced the atress of blade, has improved the life of blade when making the cutting core material more smooth.
2. The utility model discloses a set up two blades and these two blades and be the array setting, and then make the in-process atress of processing even, improved the stability of cutting, further avoided the blade to receive the damage easily, improved its life.
3. The utility model discloses in through setting up the blade for the arc form and crooked angle great make it when the circumference feeds and cuts, the sectional area of cutting is less to the cutting is more laborsaving, and the sweeps that the cutting produced still less, and the core material of leaving is more.
In conclusion, the equipment has the advantages of simple structure, good use efficiency, improvement on the machining efficiency and the like, and is particularly suitable for the technical field of metal cutting machining tools.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings described below are only 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 schematic elevation view of a trepanning coring tool;
FIG. 2 is a side view of a trepanning coring tool;
FIG. 3 is an enlarged schematic view of FIG. 1 at A;
FIG. 4 is a schematic view of the installation relationship between the blade and the cutter body;
FIG. 5 is a schematic view of the blade configuration;
FIG. 6 is a schematic cross-sectional view of a cutter body;
FIG. 7 is a schematic view of a workpiece configuration;
FIG. 8 is a schematic view showing a state in which a tool feeding blade enters an annular groove of a machining hole;
FIG. 9 is a schematic view showing the state where the blade contacts the bottom of the annular groove of the machining hole;
Detailed Description
The technical solution in the embodiment of the present invention is clearly and completely described below with reference to the accompanying drawings.
Example one
As shown in fig. 1 to 9, the present embodiment provides a core cutter for trepanning, which includes a cutter body 1, a core hole 2 extending along an axial direction of the cutter body 1 is formed on an end surface of an end portion of the cutter body 1, at least two blades 3 are rotatably disposed at a side edge of the core hole 2 at the end portion of the cutter body 1, a plane where a cutting edge 31 of each blade 3 is located and an axial line of the cutter body 1 are on the same plane, a distance between a tip portion 313 of the cutting edge 31 and a rotation axis 30 of each blade 3 is L1, a perpendicular distance between the rotation axis 30 and the axial line of the cutter body 1 is L2, and L1 is greater than L2; the blade 3 comprises a nose portion 32 and a tail portion 33, and the cutting edge 31 comprises an outer cutting edge 311 arranged at the outer side edge of the nose portion 32 and an inner cutting edge 312 arranged at the inner side edge of the nose portion 32;
The blade 3 performs a combined motion of axial feed and circumferential feed while rotating, and finishes cutting the core material 41 of the workpiece 4.
It is worth mentioning that, through setting up two blades 3 on cutter body 1 in this embodiment to the blade that sets up blade 3 includes that outer blade 311 and interior blade 312 and two edges between become certain angle, and then improved the machining efficiency who cuts core material greatly, and reduced the atress of blade, and then improved the life of blade.
Further, the blade 3 is provided in an arc shape, the outer side edge of the nose portion 32 of the blade 3 is provided in a circular arc shape, and an angle a1 is formed between the outer edge 311 and the inner edge 312, and a1 is 80 °.
It should be noted that, by arranging the blade in an arc shape and bending at a larger angle, the cutting blade has a smaller cross-sectional area when being fed circumferentially for cutting, so that the cutting is more labor-saving, the cutting generates less scraps, and more core material is left.
Further, the maximum distance from the insert 3 to the axis of the cutter body 1 is L3, the radius of the machining hole 42 of the workpiece 4 is r, and L3< r.
Furthermore, the coring hole 2 is coaxially arranged with the cutter body 1, the radius of the coring hole 2 is r1, the minimum distance from the blade 3 to the axis of the cutter body 1 is L4, and L4 is not less than r 1.
further, the blades 3 are arranged in an array along the circumferential direction of the cutter body 1.
In addition, through setting up two blades 3 and these two blades 3 are the array setting in this embodiment, and then make the in-process atress of processing even, improved the stability of cutting, further avoided blade 3 to receive the damage easily, improved its life.
further, the tip portion 313 is rounded, the radius of the rounded corner is r2, and r2 is 0.8.
It should be pointed out that here is arc through the angle of setting for the blade and the tool bit portion outside limit of blade for along with the feeding of guide arm when cutting core material, the tip of two blades can be drawn close to and then realize cutting the core material completely to the centre automatically, and simple structure is ingenious.
example two
As shown in fig. 1, in which the same or corresponding components as in the first embodiment are denoted by the same reference numerals as in the first embodiment, only the points of difference from the first embodiment will be described below for the sake of convenience. The second embodiment is different from the first embodiment in that: the end of the cutter body 1 is provided with a blade groove 11 and a positioning pin hole 12 penetrating through the blade groove 11, a positioning pin 13 is arranged in the positioning pin hole 12, and the blade 3 is rotatably arranged in the blade groove 11 through the positioning pin 13.
Further, the front end of the cutter body 1 is further provided with a locking screw hole 14, a locking screw 15 is arranged in the locking screw hole 14, and the positioning pin 13 is fixed in the positioning pin hole 12 through the locking screw 15.
in this embodiment, adorn in blade groove 11 through blade 3, can only follow the rotation of blade groove 11 direction, can not rock from top to bottom, stability is high, fixes locating pin 13 in locating pin hole 12 through locking screw 15 in addition, and it is convenient to have improved structural stability and dismouting.
The working process is as follows:
The trepanning core cutter needs to be provided with a trepanning pre-hole before being machined, a reserved core material 41 is smaller than a core hole 2 of the trepanning core cutter, an inner hole is larger than the excircle of the trepanning core cutter, when the cutter is machined, the cutter does not rotate, the front end of a cutter rod slowly extends into the hole, after a blade 3 extends into the hole, the cutter rotates, the cutter rod advances, and when the blade 3 reaches the bottom of the hole, due to the arc design of the front end of the blade 3, the bottom surface of the hole can push the cutting edge of the blade 3 to cut the core material when the cutter rod continues to move forwards until the core material is completely cut off;
It should be noted that a core hole 2 with r1 radius can be used for workpieces with core material 41 with radius smaller than r1, and when some workpieces with core material 41 with larger radius can be processed by replacing the cutter bar with larger radius of the core hole 2;
Further, when the insert 3 abuts against the bottom of the annular groove of the machining hole as shown in fig. 9, the tool is continuously fed by a stroke equal to the distance in the horizontal direction from the tip portion 311 of the insert 3 to the cutting point at that time, and the feed amount of the tool can be set by measuring the distance.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (8)

1. The utility model provides a jacking coring tool, includes cutter body (1), its characterized in that: the end face of the end part of the cutter body (1) is provided with a coring hole (2) extending along the axis direction of the cutter body (1), the end part of the cutter body (1) is rotatably provided with at least two blades (3) at the side edge of the coring hole (2), the surface where the cutting edges (31) of the blades (3) are positioned and the axis of the cutter body (1) are on the same plane, the distance between the tip parts (313) of the cutting edges (31) and the rotating shaft center (30) of the blades (3) is L1, the perpendicular distance between the rotating shaft center (30) and the axis of the cutter body (1) is L2, and L1 is more than L2; the blade (3) comprises a blade head part (32) and a blade tail part (33), and the cutting edge (31) comprises an outer cutting edge (311) arranged on the outer side edge of the blade head part (32) and an inner cutting edge (312) arranged on the inner side edge of the blade head part (32);
The blade (3) rotates and simultaneously performs composite motion of axial feeding and circumferential feeding to cut the core material (41) of the workpiece (4).
2. A trepanning coring tool as set forth in claim 1, wherein: the blade (3) is arc-shaped, the outer side edge of the head part (32) of the blade (3) is arc-shaped, an angle a1 is formed between the outer cutting edge (311) and the inner cutting edge (312), and 75 degrees < a1<85 degrees.
3. A trepanning coring tool as set forth in claim 1, wherein: the maximum distance from the blade (3) to the axis of the cutter body (1) is L3, the radius of the machining hole (42) of the workpiece (4) is r, and L3< r.
4. A trepanning coring tool as set forth in claim 1, wherein: the coring hole (2) and the cutter body (1) are coaxially arranged, the radius of the coring hole (2) is r1, the minimum distance from the blade (3) to the axis of the cutter body (1) is L4, and L4 is not less than r 1.
5. A trepanning coring tool as set forth in claim 1, wherein: the blades (3) are arranged in an array along the circumferential direction of the cutter body (1).
6. A trepanning coring tool as set forth in claim 1, wherein: the cutter body (1) is characterized in that a blade groove (11) and a positioning pin hole (12) penetrating through the blade groove (11) are formed in the end portion of the cutter body (1), a positioning pin (13) is arranged in the positioning pin hole (12), and the blade (3) is rotatably arranged in the blade groove (11) through the positioning pin (13).
7. A trepanning coring tool as set forth in claim 6, wherein: the cutter body (1) is characterized in that a locking screw hole (14) is further formed in the front end portion of the cutter body (1), a locking screw (15) is arranged in the locking screw hole (14), and the positioning pin (13) is fixed in the positioning pin hole (12) through the locking screw (15).
8. A trepanning coring tool as set forth in claim 1, wherein: the tip part (313) is set to be a round angle, the radius of the round angle is r2, and r2 is more than 0.7 and less than or equal to 0.8.
CN201920423744.2U 2019-04-01 2019-04-01 jacking coring tool Active CN209736718U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920423744.2U CN209736718U (en) 2019-04-01 2019-04-01 jacking coring tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920423744.2U CN209736718U (en) 2019-04-01 2019-04-01 jacking coring tool

Publications (1)

Publication Number Publication Date
CN209736718U true CN209736718U (en) 2019-12-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920423744.2U Active CN209736718U (en) 2019-04-01 2019-04-01 jacking coring tool

Country Status (1)

Country Link
CN (1) CN209736718U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111089749A (en) * 2020-01-09 2020-05-01 徐阿勇 Coring equipment and coring process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111089749A (en) * 2020-01-09 2020-05-01 徐阿勇 Coring equipment and coring process

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