阅读说明：本技术 一种双面限位斜穿锁紧可换钻尖钻杆 (double-sided limiting obliquely-penetrating locking replaceable drill point drill rod ) 是由 刘伟 于 2019-11-12 设计创作，主要内容包括：本发明涉及双面限位斜穿锁紧可换钻尖钻杆,为由钻体、护锥和圆柱直柄以公共轴线CL同轴的组合体；上端设有用于安装可换钻尖的安装结构,安装结构为以公共轴线CL中心对称的半封闭的槽,槽具有作为定位面的第一底面和第二底面,呈V形设置；槽两侧的实体部分,与公共轴线正交且与槽斜交设置有安装螺孔以及与其衔接的安装沉孔；槽两侧的实体部分,按照轴线CL呈360°中心对称分布,在安装螺孔与安装沉孔的下方,并在第一底面和第二底面的上方,设置有第一限位螺孔和第二限位螺孔。通过两限位螺钉和紧固螺钉将钻杆与钻尖安装在一起,实现在使用中不拆卸刀杆的情况下更换可换钻尖；通过V形定位结构和两限位结构保证工作状态下定位可靠。(The invention relates to a double-side limiting obliquely-penetrating locking replaceable drill point drill rod which is an assembly formed by a drill body, a protective cone and a cylindrical straight shank which are coaxial with a common axis CL, wherein the upper end of the assembly is provided with a mounting structure for mounting a replaceable drill point, the mounting structure is a semi-closed groove which is centrosymmetric with the common axis CL, the groove is provided with an bottom surface and a second bottom surface which are used as positioning surfaces and are arranged in a V shape, solid parts on two sides of the groove are orthogonal to the common axis and are obliquely crossed with the groove and are provided with a mounting screw hole and a mounting counter bore connected with the mounting screw hole, the solid parts on two sides of the groove are centrally and symmetrically distributed in 360 degrees according to the axis CL, a limiting screw hole and a second limiting screw hole are arranged below the mounting screw hole and the mounting counter bore and above a bottom surface and a second bottom surface, the drill rod and the drill point are mounted on a through two limiting screws and fastening screws, so that the replaceable drill point can be replaced without dismounting a tool bar in use, and the reliable.)

1, double-sided limiting obliquely-penetrating locking replaceable drill point drill rods, which are characterized by being a combination body formed by a drill body (109), a protective cone (107) and a cylindrical straight shank (106) which are coaxial with a common axis CL;

a spiral th chip groove (101A) and a spiral second chip groove (101B) which take an axis CL as a symmetry center are arranged;

the upper end of the connecting rod is provided with a mounting structure (102), the mounting structure (102) is a semi-closed groove (115) which is centrosymmetric about a common axis CL, and the groove (115) is provided with an th bottom surface (110A) and a second bottom surface (110B) which are used as positioning surfaces and are arranged in a V shape;

the solid parts at two sides of the groove (115) are provided with mounting screw holes (103B) and mounting counter bores (103A) connected with the mounting screw holes, wherein the mounting screw holes are orthogonal to the common axis and are obliquely crossed with the groove (115);

solid parts on two sides of the groove (115) are distributed in 360-degree central symmetry according to an axis CL, and a limit screw hole (104A) and a second limit screw hole (104B) are arranged below the mounting screw hole (103B) and the mounting counter bore (103A) and above the th bottom surface (110A) and the second bottom surface (110B).

2. The double-sided limiting slant-threading locking replaceable drill tip rod of claim 1, wherein the chip flutes (101A) and the second chip flutes (101B) have a truncated shape in a cross section perpendicular to the axis CL.

3. The double-sided limiting slant-threading locking replaceable drill tip drill rod as claimed in claim 2, wherein the truncated shape is formed by connecting four line segments in sequence, the initial segment and the final segment are straight segment (Z1) and the second straight segment (Z2), and the middle segment is arc segment (R1) and the second arc segment (R2).

4. The double-sided limiting slant-threading locking replaceable drill tip rod of claim 1, wherein the V-shaped included angle between the bottom surface (110A) and the bottom surface (110B) is 120-140 °, and when the replaceable drill tip (200) is installed, the replaceable drill tip can be matched with the positioning surface (205A) and the second positioning surface (205B) of the replaceable drill tip (200) so that the replaceable drill tip (200) and the drill rod (100) are coaxial with each other by a common axis CL.

5. The double-sided limiting angle-penetration locking replaceable drill tip rod of claim 1, wherein the limiting screw hole (104A) and the second limiting screw hole (104B) have respective axes spatially perpendicular and non-orthogonal to the common axis CL.

6. double-sided limiting slant-threading locking replaceable drill tip rod according to claim 1, wherein the drill tip rod is arranged with 360 ° central symmetry according to the axis CL, and has at least a cooling channel (120A) and a second cooling channel (120B), the cooling channel (120A) and the second cooling channel (120B) are communicated with the main cooling channel (105).

7. The double-sided limiting and obliquely-penetrating locking replaceable drill tip drill rod as claimed in claim 1, wherein the cylindrical straight shank (106) at the lower end of the drill rod (100) is provided with a pipe internal thread (107) for connecting an oil way, and the cylindrical straight shank (106) is provided with a side pressure surface (108).

Technical Field

The invention relates to double-sided limiting obliquely-penetrating locking replaceable drill point drill rods, and belongs to the technical field of cutting tools.

Background

In the existing hole processing technology, the hard alloy drill bit is widely adopted by , but in the large-diameter drilling processing, the cost of the integral hard alloy drill bit is high, particularly in the high-speed and high-efficiency drilling processing, the cost of the inner-cooling integral hard alloy drill bit is higher, and the bit-changing drill becomes the necessary technical path of low-cost processing.

Patent No. 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.

Chinese patent No. 201710517688.4 discloses a "high stability self-centering drill bit" which is mounted on a tool holder by rotational locking using a pin for positioning. 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.

The ' drill bit with a replaceable bit type structure' disclosed in the patent No. 201510252190.0 is positioned by a pin and is fastened by a pin side face screw.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides double-sided limiting obliquely-penetrating locking replaceable drill point drill rods which are used for installing replaceable drill points and combining double-sided limiting obliquely-pulling locking type drill bits for drilling.

The purpose of the invention is realized by the following technical scheme:

double-sided limiting slant-through locking replaceable drill tip drill rods are characterized in that the drill tips are a combination body formed by a drill body, a protective cone and a cylindrical straight shank which are coaxial with a common axis CL;

a spiral chip groove and a second chip groove which take the axis CL as a symmetry center are arranged;

the upper end of the drill bit is provided with a mounting structure for mounting a replaceable drill tip, the mounting structure is a semi-closed groove which is centrosymmetric about a common axis CL, the groove is provided with a th bottom surface and a second bottom surface which are used as positioning surfaces and arranged in a V shape;

the solid parts at two sides of the groove are provided with mounting screw holes and mounting counter bores connected with the mounting screw holes, wherein the mounting screw holes are orthogonal to the common axis and are obliquely crossed with the groove;

the solid parts on the two sides of the groove are in central symmetry distribution of 360 degrees according to the axis CL, and are provided with a limit screw hole and a second limit screw hole below the mounting screw hole and the mounting counter bore and above the th bottom surface and the second bottom surface.

, the double-sided limiting slant-threading locking replaceable drill tip rod is provided, wherein the chip discharge groove and the second chip discharge groove have a truncated shape in a section perpendicular to the axis CL.

steps, the double-sided limiting slant-penetration locking replaceable drill point drill rods are formed by sequentially connecting four line sections, wherein the starting section and the ending section are the th line section and the second line section, and the middle section is the th arc line section and the second arc line section.

, the double-sided limiting obliquely penetrating locking replaceable drill point drill rod has a V-shaped included angle of 120-140 degrees between the bottom surface and the second bottom surface, and can be matched with the positioning surface and the second positioning surface of the replaceable drill point when the replaceable drill point is installed, so that the replaceable drill point and the drill rod are coaxial with each other on the common axis CL.

, the kinds of double-sided limiting angle penetration locking replaceable drill point drill rods are obtained, wherein the axes of the limiting screw holes and the second limiting screw holes are perpendicular and non-orthogonal to the common axis CL in space.

, the double-sided limiting slant-through locking replaceable drill point drill rods are distributed in a 360-degree central symmetry mode according to the axis CL, and at least a th cooling channel and a second cooling channel are arranged, and the th cooling channel and the second cooling channel are communicated with the main cooling channel.

, the double-sided limiting obliquely penetrating and locking replaceable drill point drill rod is characterized in that a cylindrical straight handle at the lower end of the drill rod is provided with pipe internal threads for connecting an oil way, and a side pressing surface is arranged on the cylindrical straight handle.

Compared with the prior art, the invention has obvious advantages and beneficial effects, and is embodied in the following aspects:

① the drill rod and the replaceable drill point can be installed at by two limit screws and fastening screws to form double-sided limit diagonal locking type head-changing drill for drilling;

② the upper part of the drill rod is provided with a mounting structure, the groove of the mounting structure is provided with a V-shaped positioning bottom surface, the lower part of the replaceable drill point is provided with a V-shaped positioning surface, the replaceable drill point and the V-shaped positioning structure of the drill rod have the same space angle and can be matched, after mounting, the drill rod and the replaceable drill point have a common axis CL, and the replaceable drill point and the drill rod are ensured to be coaxial with the common axis CL;

③ the drill rod and the replaceable drill point are reliably positioned and not loosened under the working state of rotating in the CCW direction through the limit screw and the second limit screw;

④ fastening by fastening screws, after installation, the replaceable drill point and the drill rod are coaxial, the replaceable drill point is stably fixed on the drill rod and has a common axis CL, after the fastening screws are locked, the drill rod and the replaceable drill point are distributed in a sandwich way, the replaceable drill point and the drill rod are firmly connected and form whole bodies;

⑤ has the advantages of simple structure, accurate positioning, high mechanical strength, reliable installation, remarkably prolonged service life of the replaceable drill point, and good 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 needed 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 present invention;

FIG. 2: front assembly detail view of the invention;

FIG. 3: side assembly detail view of the invention;

FIG. 4: a T-T sectional view (sectional view) of the present invention;

FIG. 5: assembly X-X section view (cross-sectional view) of the present invention;

FIG. 6: the assembly schematic diagram of the working state of the invention;

FIG. 7: the invention is a schematic diagram of the assembly relation;

FIG. 8: a schematic view of an alternative embodiment cooling channel of the present invention;

FIG. 9: a schematic view of an alternative embodiment of the cylindrical stem of the present invention.

Detailed Description

The embodiments of the present invention generally described and illustrated in the figures herein can be arranged and designed in a wide variety of different configurations and, thus, the following detailed description of the embodiments of the present invention provided in the figures is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus should not be further defined and explained in in subsequent figures if a item is defined in figures.

As shown in FIGS. 1 to 5, kinds of double-sided limiting obliquely-penetrating locking replaceable drill tip rods are combined bodies formed by coaxially arranging a drill body 109, a protective cone 107 and a cylindrical straight shank 106 on a common axis CL;

the drill rod is provided with a spiral -th chip removal groove 101A and a spiral second chip removal groove 101B which take an axis CL as a symmetric center and are used for discharging chips formed by drilling, the -th chip removal groove 101A and the second chip removal groove 101B are provided with a designed section on a T-T section vertical to the axis CL, the section is formed by sequentially connecting four line sections, the starting section and the ending section are -th straight line section Z1 and second straight line section Z2, the middle section is -th arc line section R1 and second arc line section R2, different arc radiuses and splicing angles can be selected according to different sizes of the drill rod 100, the -th chip removal groove 101A and the second chip removal groove 101B can be regarded as -th chip removal groove 203A and second chip removal groove 203B of the mounted replaceable drill tip 200 extending 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 replaceable drill point 200 is provided with a mounting structure 102 for mounting the replaceable drill point 200, the mounting structure 102 is a semi-closed groove 115 which is centrosymmetric about a common axis CL, the groove 115 is provided with an th bottom surface 110A and a second bottom surface 110B which are arranged in a V shape, the V-shaped included angle between the th bottom surface 110A and the second bottom surface 110B is 120-140 degrees, the th bottom surface 110A and the second bottom surface 110B are positioning surfaces, and when the replaceable drill point 200 is mounted, the mounting structure can be matched with the th positioning surface 205A and the second positioning surface 205B of the replaceable drill point 200 to enable the replaceable drill point 200 and the drill rod 100 to be coaxial about the common axis CL;

the solid parts at two sides of the groove 115 are orthogonal to the common axis and are obliquely provided with an installation screw hole 103B and an installation counter bore 103A connected with the same, when in installation, the installation screw hole 103B is matched with the thread part of the fastening screw 300, and the counter bore 103A is used for placing the counter bore part of the fastening screw 300;

solid parts on two sides of the groove 115 are distributed in a 360-degree central symmetry mode according to an axis CL, a limit screw hole 104A and a second limit screw hole 104B are arranged below the installation screw hole 103B and the installation counter bore 103A and above the th bottom surface 110A and the second bottom surface 110B, and respective axes of the limit screw hole 104A and the second limit screw hole 104B are perpendicular to the common axis CL in space but not orthogonal.

Referring to fig. 6 to 7, the replaceable drill tip 100 is used for mounting the replaceable drill tip 200, when the replaceable drill tip is mounted, the -th limit screw 400A and the second limit screw 400B are screwed into the -th limit screw hole 104A and the second limit screw hole 104B, respectively, and abut against the -th limit surface 204A and the second limit surface 204B, and the replaceable drill tip 200 is stably fixed on the drill rod 100 by the fastening screw 300, so that the possibility of upward movement of the replaceable drill tip 200 is suppressed, and the replaceable drill tip 200 is prevented from being loosened from the drill rod 100, so that double-sided limit cable-stayed locking type bit changer 01 is combined for performing drilling processing, so that the replaceable drill rod 100 and the replaceable drill tip 200 are conveniently replaced without detaching the tool bar 100 in use, the drill rod 100 and the replaceable drill tip 200 are reliably positioned in a working state of rotating in the CCW direction by the -th limit screw 400A and the second limit screw 400B, and the fastening screw 300 is locked, so that the drill rod 100 and the replaceable drill tip 200 are distributed in a sandwich.

As shown in FIG. 8, the replaceable drill tip is centrally and symmetrically distributed in 360 degrees according to the axis CL, and is provided with at least a th cooling channel 120A and a second cooling channel 120B, wherein the th cooling channel 120A and the second cooling channel 120B are communicated with the main cooling channel 105, when the replaceable drill tip 200 is machined, cooling liquid is supplied to the replaceable drill tip, when the cooling channels are arranged, the spatial arrangement of the th cooling channel 120A and the second cooling channel 120B needs to be fully considered, the replaceable drill tip cannot be interfered with the st limiting screw hole 104A or the second limiting screw hole 104B, the leakage problem of the cooling liquid exists, and based on the fact, the st limiting screw hole 104A or the second limiting screw hole 104B can be arranged eccentrically but not limited.

As shown in fig. 9, a cylindrical straight shank 106 at the lower end of the drill rod 100 is provided with an internal thread 107 for connecting an oil path for supplying a cooling fluid to the bit-changing drill 01 during drilling; the cylindrical straight shank 106 is provided with a side pressing surface 108, so that the bit-changing drill 01 can be conveniently installed on a lathe.

The drill rod 100 is preferably made of high-quality alloy steel in consideration of more manufacturing cost, and may be made of hard alloy material by a grinding method. The expression "set" or "have" a certain structure in the present invention is understood to mean that the material is machined or 3D printed.

In conclusion, the drill rod with the replaceable drill point and the double-sided limiting obliquely-penetrating locking function can be assembled into double-sided limiting obliquely-pulling locking type drill bits for performing drilling processing by mounting the drill rod and the replaceable drill point at through the two limiting screws and the fastening screws, and the replaceable drill point can be conveniently replaced under the condition that a cutter bar is not detached in use.

The upper part of the drill rod is provided with an installation structure, and a groove of the installation structure is provided with a V-shaped positioning bottom surface; the lower part of the replaceable drill point is provided with a V-shaped positioning surface, and the replaceable drill point and the V-shaped positioning structure of the drill rod have the same space angle and can be matched; after installation, the drill rod and the replaceable drill tip share a common axis CL, ensuring that the replaceable drill tip is coaxial with the drill rod at the common axis CL.

The limit screw and the second limit screw ensure that the drill rod and the replaceable drill point are reliably positioned in the working state of rotating in the CCW direction and are not loosened.

The replaceable drill point and the drill rod are coaxial after being fastened by the fastening screws, the replaceable drill point and the drill rod are stably fixed on the drill rod and share a common axis CL, and after the replaceable drill point and the drill rod are locked by the fastening screws, the drill rod and the replaceable drill point are distributed in a sandwich mode, and the replaceable drill point and the drill rod are firmly connected and form integral bodies.

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 good in economical efficiency.

It should be noted that like reference numerals and letters refer to like elements in the following figures, and thus , once is defined in figures, it is not necessary to further define or interpret in the following figures.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and shall be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

It should be noted that, in this document, relational terms such as , second and the like are only used to distinguish entities or operations from another entities or operations, and no necessarily requires or implies that any such actual relationship or order exists between the entities or operations.