CN213104684U - Symmetrical inclined plane positioning replaceable drill rod - Google Patents
Symmetrical inclined plane positioning replaceable drill rod Download PDFInfo
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- CN213104684U CN213104684U CN202021822204.0U CN202021822204U CN213104684U CN 213104684 U CN213104684 U CN 213104684U CN 202021822204 U CN202021822204 U CN 202021822204U CN 213104684 U CN213104684 U CN 213104684U
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Abstract
The utility model relates to a symmetrical inclined plane location interchangeable drilling rod, for by the drill body, protect awl and cylinder straight shank with the coaxial assembly of public axis CL, be equipped with spiral helicine drilling rod first chip groove and drilling rod second chip groove that uses axis CL as the center of symmetry, the upper end is equipped with mounting structure, mounting structure is the semi-enclosed groove that uses public axis CL centrosymmetric, the lower part in groove is drilling rod first location inclined plane and drilling rod second location inclined plane as the locating surface; a first mounting screw hole and a second mounting screw hole are formed in the solid part on the two sides of the groove above the first positioning inclined plane and the second positioning inclined plane of the drill rod; a first limiting screw hole and a second limiting screw hole are arranged below the first mounting screw hole and the second mounting screw hole, a mounting structure is arranged at the upper part of the drill rod, and a groove of the mounting structure is provided with a positioning inclined plane; the changeable drill point and the drill rod are the same in space angle and can be matched, after the changeable drill point and the drill rod are installed, the changeable drill point and the drill rod share a common axis CL, and the changeable drill point is stably fixed on the drill rod.
Description
Technical Field
The utility model relates to a symmetry inclined plane location interchangeable drilling rod belongs to cutting tool technical field.
Background
At present, in a hole machining process, a hard alloy drill bit is widely adopted, but in large-diameter drilling machining, the whole hard alloy drill bit is expensive in manufacturing cost; especially in high-speed and high-efficiency drilling, the manufacturing cost of the internal-cooling type integral hard alloy drill bit is higher, and the drill bit is an inevitable technical path for low-cost processing. The prior disclosed technical scheme has the following defects:
for example: PCT/IL2005/000999 discloses a "cutting tool, cutting head and cutting tool assembly" which, when applied to a drilling tool, presents the problem of the receiving portion of the shank being too thin and the clamping force being reduced after multiple changes of the drill tip, which in turn leads to bit failure.
The Chinese patent with the patent application number of 201710517688.4 discloses a high-stability self-centering drill bit, wherein the drill bit is positioned by a pin and is installed on a cutter bar through rotary locking. The mounting mode is accurate in positioning, but the biggest problem is that the mounting part of the cutter bar is single-thin in structure, fatigue is easy to occur after multiple clamping, and the situation that the clamping force is reduced to further cause the failure of the drill bit with the replaceable drill point exists.
Chinese patent No. 201510252190.0 discloses a drill bit with a replaceable cutter head structure, which is positioned by a pin and fastened by a screw on a lateral side surface of the pin; there is also a problem that the structure of the blade holder mounting portion is thin.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defects existing in the prior art and providing a replaceable drill rod for positioning a symmetrical inclined plane.
The purpose of the utility model is realized through the following technical scheme:
the symmetrical inclined plane positioning replaceable drill rod is characterized in that: the drill bit is a combination body formed by a drill body, a protection cone and a cylindrical straight shank which are coaxial by a common axis CL, and is provided with a spiral drill rod first chip groove and a spiral drill rod second chip groove which take the axis CL as a symmetric center, the upper end of the combination body is provided with a mounting structure, the mounting structure is a semi-closed groove which is centrosymmetric by the common axis CL, and the lower part of the groove is a drill rod first positioning inclined plane and a drill rod second positioning inclined plane which are used as positioning planes; and the solid parts at two sides of the groove are provided with a first mounting screw hole and a second mounting screw hole above the first positioning inclined plane and the second positioning inclined plane of the drill rod, and a first limiting screw hole and a second limiting screw hole are arranged below the first mounting screw hole and the second mounting screw hole.
Further, in the replaceable drill rod for positioning the symmetrical inclined plane, the first chip groove and the second chip groove of the drill rod are provided with a section on the cross section perpendicular to the axis CL, the section is formed by sequentially connecting four line sections, the starting section and the ending section are a first straight line section and a second straight line section, and the middle section is a first arc line section and a second arc line section.
Further, the replaceable drill rod is positioned by the symmetrical inclined planes, wherein the first positioning inclined plane and the second positioning inclined plane of the drill rod are structurally symmetrical to the center of the common axis CL and are arranged in a spatial V shape, and the V-shaped included angle is 100-140 degrees.
Further, the replaceable drill rod is positioned on the symmetrical inclined plane, wherein the drill rods are distributed in a 360-degree central symmetry mode according to the axis CL and are provided with at least a first cooling channel and a second cooling channel, and the first cooling channel and the second cooling channel are communicated with the main cooling channel.
Further, in the above symmetrical inclined plane positioning replaceable drill rod, the cylindrical straight shank is provided with pipe internal threads for connecting a cooling liquid path, and the cylindrical straight shank is provided with a side pressure surface.
Compared with the prior art, the utility model have apparent advantage and beneficial effect, the concrete aspect that embodies is in following:
firstly, the upper part of the drill rod is provided with an installation structure, and a groove of the installation structure is provided with a positioning inclined plane; the replaceable drill tip and the drill rod have the same space angle and can be matched with each other, after the replaceable drill tip and the drill rod are installed, the replaceable drill tip and the drill rod share the same common axis CL, and the replaceable drill tip is stably fixed on the drill rod;
the drill rods are centrally and symmetrically distributed according to the axis CL of 360 degrees, and are provided with at least a first cooling channel and a second cooling channel which are communicated with the main cooling channel; the cooling liquid is used for supplying cooling liquid to the replaceable drill point during processing;
the cylindrical straight shank of the drill rod is provided with pipe internal threads for connecting a cooling liquid path and supplying cooling liquid to the replaceable drill bit during drilling; the cylindrical straight shank is provided with a side pressing surface, so that the replaceable drill bit for positioning the symmetrical inclined surface can be conveniently installed on a lathe;
the drill rod and the replaceable drill point can be installed together through two fastening screws to form a symmetrical inclined plane positioning replaceable drill bit for performing drilling processing, so that the replaceable drill point can be conveniently replaced under the condition that the cutter bar is not detached in use; the cutting is carried out according to the CCW rotating direction during working, and the cutting is stable; the replaceable drill point has the characteristics of simple structure, accurate positioning, high mechanical strength and the like, is reliable to install, can obviously prolong the service life of the replaceable drill point, and is low in cost and good in economical efficiency.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1: a perspective view of the drill rod;
FIG. 2: the assembly of the drill rod and the replaceable drill tip is a three-dimensional schematic diagram;
FIG. 3: a front view of the replaceable drill tip;
FIG. 4: side view of the interchangeable drill tip;
FIG. 5: assembling a partial view of the drill rod and the front surface of the replaceable drill tip;
FIG. 6: assembling a partial view of the drill rod and the side surface of the replaceable drill tip;
FIG. 7: FIG. 5 is an X-X sectional view;
FIG. 8: FIG. 6 is a cross-sectional view taken at T-T;
FIG. 9: a drill rod schematic with cooling channels;
FIG. 10: a partial schematic view of a drill rod;
FIG. 11: the installation and application of the drill rod and the replaceable drill point are shown schematically.
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 only some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the directional terms and the sequence terms and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
As shown in fig. 1 to 8, the drill rod 100 is an assembly formed by a drill body 109, a protection cone 107 and a cylindrical straight shank 106 which are coaxial with a common axis CL, and is provided with a spiral drill rod first chip removal groove 101A and a spiral drill rod second chip removal groove 101B which are symmetrical about the axis CL and used for discharging chips formed by drilling, the drill rod first chip removal groove 101A and the drill rod second chip removal groove 101B have a section shape on a T-T section perpendicular to the axis CL, the section shape is formed by sequentially connecting four line segments, a starting segment and an ending segment are a first straight line segment Z1 and a second straight line segment Z2, an intermediate segment is a first circular arc segment R1 and a second circular arc segment R2, and different circular arc radiuses and splicing angles can be selected according to different sizes of the drill rod 100; the first chip flute 101A and the second chip flute 101B can be regarded as the extension of the first chip flute 203A and the second chip flute 203B of the mounted replaceable drill tip 200 along the axis CL on the drill rod 100, and the lengths can be adjusted according to the drilling depth;
the upper end of the drill rod is provided with a mounting structure 102 for mounting the replaceable drill tip 200 and mounting the replaceable drill tip 200, the mounting structure 102 is a semi-closed groove 115 which is centrosymmetric about a common axis CL, and the lower part of the groove 115 is provided with a first positioning inclined surface 110A and a second positioning inclined surface 110B of the drill rod which are used as positioning surfaces; the first positioning inclined surface 110A and the second positioning inclined surface 110B of the drill rod are structurally symmetrical with the common axis CL in a central mode and are arranged in a space V shape, the V-shaped included angle ranges from 100 degrees to 140 degrees, and when the replaceable drill point 200 is installed, the first positioning inclined surface 205A and the second positioning inclined surface 205B of the drill point of the replaceable drill point 200 are matched with each other respectively, so that the replaceable drill point 200 and the drill rod 100 are coaxial with each other through the common axis CL.
A first mounting screw hole 103A and a second mounting screw hole 103B are formed in the solid part on the two sides of the groove 115 above the first positioning inclined plane 110A and the second positioning inclined plane 110B of the drill rod; a first limit screw hole 104A and a second limit screw hole 104B are arranged below the first mounting screw hole 103A and the second mounting screw hole 103B; during installation, the drill rod 100 and the replaceable drill tip 200 are firmly combined into a whole by locking the first fastening screw 400A and the second fastening screw 400B, screwing the first limiting screw 500A and the first limiting screw 500B into the first limiting screw hole 104A and the second limiting screw hole 104B of the drill rod 100 and abutting the first limiting surface 204B and the second limiting surface 204A;
The replaceable drill point 200 is a sheet structure with an axis CL being 360-degree central symmetry, a first drill point positioning inclined surface 205A and a second drill point positioning inclined surface 205B are arranged at the lower end of the replaceable drill point 200, the first drill point positioning inclined surface 205A and the second drill point positioning inclined surface 205B are structurally symmetrical to the common axis CL and are arranged in a space V shape, a space included angle is 100-140 degrees, a first drill point mounting surface 207A and a second drill point mounting surface 207B are inclined with the adjacent first drill point positioning inclined surface 205A or the adjacent second drill point positioning inclined surface 205B, the included angle is 90-100 degrees, the first drill point positioning inclined surface 205A and the second drill point positioning inclined surface 205B are matched with the first drill rod positioning inclined surface 110A and the second drill rod positioning inclined surface 110B, and the replaceable drill point 200 and the drill rod 100 are coaxial with the common axis CL;
the drill point first mounting surface 207A and the drill point second mounting surface 207B are in an inclined state with the adjacent drill point first positioning inclined surface 205A or the adjacent drill point second positioning inclined surface 205B, the lower parts of the adjacent drill point first mounting surface 207A and the adjacent drill point second mounting surface 207B are provided with sheet structures of a first limiting surface 204A and a second limiting surface 204B, and the first limiting surface 204A and the second limiting surface 204B form a dovetail structure with a narrow top and a wide bottom;
when the replaceable drill bit is installed, the first limiting screw hole 104A and the second limiting screw hole 104B which are screwed into the drill rod 100 through the first limiting screw 500A and the second limiting screw 500B are abutted to the first limiting surface 204B and the second limiting surface 204A, so that the replaceable drill bit is prevented from loosening from the drill rod;
the replaceable drill point 200 is characterized in that the replaceable drill point is centrally and symmetrically distributed in 360 degrees according to an axis CL and is provided with a first cutting edge 202A and a second cutting edge 202B, the first cutting edge 202A and the second cutting edge 202B are in a linear shape, an arc shape or a space curve shape suitable for cutting, and the first cutting edge 202A and the second cutting edge 202B extend from the central axis CL to the maximum diameter positions on two sides at the uppermost end of the replaceable drill point 200; a first edge 201A and a second edge 201B are arranged on the left side and the right side, and the first edge 201A and the second edge 201B are parts of an imaginary cylinder at the outermost edges of the first cutting edge 202A and the second cutting edge 202B, have a width and are in a spiral shape;
the outermost edge tangents of the first edge 201A and the second edge 201B form a spiral angle 220 with the axis CL, the spiral angle 220 ranges from 15 degrees to 35 degrees, and the width of the first edge 201A and the width of the second edge 201B are 0.05-0.1 times of the diameter of the replaceable drill tip 200. The distance between the first edge 201A and the second edge 201B in the direction of the axis CL is the edge length, and the edge length is 0.3-1.0 time of the diameter of the replaceable drill tip 200;
adjacent to the first cutting edge 202A and the second cutting edge 202B, with the first edge 201A and the second edge 201B as edges, there are provided a drill tip first chip flute 203A and a drill tip second chip flute 203B, the drill tip first chip flute 203A and the drill tip second chip flute 203B being natural extensions of the first cutting edge 202A and the second cutting edge 202B on the replaceable drill tip 200 in a spiral manner and along the first edge 201A and the second edge 201B with the axis CL as a reference; a first fastening through hole 206A and a second fastening through hole 206B are respectively arranged in the middle of the first drill tip chip groove 203A and the second drill tip chip groove 203B;
the first fastening through hole 206A and the second fastening through hole 206B are perpendicular to the drill point first mounting surface 207A and the drill point second mounting surface 207B, respectively; during installation, the replaceable drill tip 200 is stably fixed on the drill rod 100 through the first fastening screw 400A and the second fastening screw 400B, and the replaceable drill tip is firmly connected and integrated;
the lower part of the replaceable drill tip 200 is provided with a positioning structure, namely a first drill tip positioning inclined surface 205A and a second drill tip positioning inclined surface 205B, and the first drill tip positioning inclined surface 205A and the second drill tip positioning inclined surface 205B have the same spatial angle with the first positioning inclined surface 110A and the second positioning inclined surface 110B of the installation structure 102 of the drill rod 100 and can be matched with each other; after installation, the interchangeable drill tip 200 and the drill rod 100 share a common axis CL, ensuring that in operation the interchangeable drill tip 200 and the drill rod 100 rotate as a unit in the CCW direction about the common axis CL, as shown in fig. 11.
The first mounting surface 207A and the second mounting surface 207B of the replaceable drill point are inclined by 90-100 degrees with the adjacent first positioning inclined surface 205A and the second positioning inclined surface 205B of the drill point.
As shown in fig. 9, the drill rod, which is centrally symmetrical about an axis CL of 360 °, has at least a first cooling channel 120A and a second cooling channel 120B, the first cooling channel 120A and the second cooling channel 120B communicating with the main cooling channel 105; when machining, the replaceable drill tip 200 is used for supplying cooling liquid, when the cooling channels are arranged, the space arrangement of the first cooling channel 120A and the second cooling channel 120B is fully considered, interference with the first installation screw hole 103A and the second installation screw hole 103B does not exist, and the problem of leakage of the cooling liquid does not exist.
As shown in fig. 10, the cylindrical shank 106 at the lower end of the drill rod 100 is provided with internal threads 117 for connecting to a coolant circuit for supplying coolant to the interchangeable drill bit during drilling; the cylindrical straight shank 106 is provided with a side pressure surface 108, so that the replaceable drill bit for positioning the symmetrical inclined surface can be conveniently installed on a lathe.
To sum up, the upper part of the drill rod of the utility model is provided with an installation structure, and the groove of the installation structure is provided with a positioning inclined plane; the replaceable drill tip and the drill rod have the same space angle and can be matched with each other, after the replaceable drill tip and the drill rod are installed, the replaceable drill tip and the drill rod share the same common axis CL, and the replaceable drill tip is stably fixed on the drill rod;
the drill rod and the replaceable drill point can be installed together through the two fastening screws and the two limiting screws to form a symmetrical inclined plane positioning replaceable drill bit for performing drilling processing, so that the replaceable drill point can be conveniently replaced under the condition that a cutter bar is not dismounted in use; the cutting is carried out according to the CCW rotating direction during working, and the cutting is stable; the replaceable drill point has the characteristics of simple structure, accurate positioning, high mechanical strength and the like, is reliable to install, can obviously prolong the service life of the replaceable drill point, and is low in cost and good in economical efficiency.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (5)
1. Symmetrical inclined plane location interchangeable drilling rod, its characterized in that: the drill bit is an assembly formed by a drill body (109), a protective cone (107) and a cylindrical straight shank (106) which are coaxial with a common axis CL, and is provided with a spiral drill rod first chip removal groove (101A) and a spiral drill rod second chip removal groove (101B) which take the axis CL as a symmetry center, the upper end of the assembly is provided with a mounting structure (102), the mounting structure (102) is a semi-closed groove (115) which is centrosymmetric with the common axis CL, and the lower part of the groove (115) is provided with a drill rod first positioning inclined surface (110A) and a drill rod second positioning inclined surface (110B) which are used as positioning surfaces; a first mounting screw hole (103A) and a second mounting screw hole (103B) are formed above the first positioning inclined plane (110A) and the second positioning inclined plane (110B) of the drill rod in the solid parts at two sides of the groove (115); a first limiting screw hole (104A) and a second limiting screw hole (104B) are arranged below the first mounting screw hole (103A) and the second mounting screw hole (103B).
2. The symmetrical bevel positioning interchangeable drill pipe of claim 1, wherein: the section of the first drill rod chip groove (101A) and the section of the second drill rod chip groove (101B) perpendicular to the axis CL are in a truncated shape, the truncated shape is formed by sequentially connecting four line sections, the starting section and the ending section are a first straight line section (Z1) and a second straight line section (Z2), and the middle section is a first arc line section (R1) and a second arc line section (R2).
3. The symmetrical bevel positioning interchangeable drill pipe of claim 1, wherein: the first positioning inclined surface (110A) and the second positioning inclined surface (110B) of the drill rod are structurally symmetrical to the center of a common axis CL and are arranged in a spatial V shape, and the V-shaped included angle is 100-140 degrees.
4. The symmetrical bevel positioning interchangeable drill pipe of claim 1, wherein: the drill rods are arranged in a 360 DEG centrosymmetric manner according to an axis CL and are provided with at least a first cooling channel (120A) and a second cooling channel (120B), and the first cooling channel (120A) and the second cooling channel (120B) are communicated with the main cooling channel (105).
5. The symmetrical bevel positioning interchangeable drill pipe of claim 1, wherein: the cylindrical straight shank (106) is provided with an internal thread (117) for connecting a cooling liquid path, and the cylindrical straight shank (106) is provided with a side pressure surface (108).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021822204.0U CN213104684U (en) | 2020-08-27 | 2020-08-27 | Symmetrical inclined plane positioning replaceable drill rod |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021822204.0U CN213104684U (en) | 2020-08-27 | 2020-08-27 | Symmetrical inclined plane positioning replaceable drill rod |
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| CN213104684U true CN213104684U (en) | 2021-05-04 |
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| CN202021822204.0U Active CN213104684U (en) | 2020-08-27 | 2020-08-27 | Symmetrical inclined plane positioning replaceable drill rod |
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