阅读说明：本技术 一种新型通用盲孔镗刀杆 (Novel general blind hole boring cutter pole ) 是由 王长海 于 2020-07-08 设计创作，主要内容包括：一种新型通用盲孔镗刀杆,包括：一刀杆主体,其表面设有弹性压板和螺钉沉孔槽,且弹性压板和螺钉沉孔槽呈连体式结构；一镗刀头,且镗刀头的表面开设有长槽,该长槽与弹性压板一端设置的端头配合连接；其技术要点为,在夹持镗刀头的结构设计中应用了超“六点定位原则”的定位方式,增大了定位约束的可靠性；其中镗刀头下平面之间约束"三点定位"；在90°V形长槽之间约束"四点定位",上述七个定位点之间存在有两个重复点或过定位点,通过定位约束在加工过程中使结构间稳定、坚固,可靠；利用在舌形弹性压板的前角和斜顶面,以及压紧螺钉的沉头部,有效的扩大了容屑空间,起到了便利排屑的作用。(A novel universal blind hole boring cutter bar comprises: the surface of the cutter rod main body is provided with an elastic pressure plate and a screw counter bore groove, and the elastic pressure plate and the screw counter bore groove are of an integral structure; the surface of the boring cutter head is provided with a long groove, and the long groove is connected with an end head arranged at one end of the elastic pressure plate in a matching way; the technical key point is that a positioning mode exceeding a six-point positioning principle is applied in the structural design of clamping the boring cutter head, so that the reliability of positioning constraint is improved; wherein the lower planes of the boring cutter heads are restrained to be positioned at three points; the four-point positioning is restrained between the 90-degree V-shaped long grooves, two repeated points or over-positioning points exist between the seven positioning points, and the positioning restraint is adopted to ensure that the structures are stable, firm and reliable in the machining process; the front angle and the inclined top surface of the tongue-shaped elastic pressure plate and the countersunk head part of the compression screw are utilized, so that the chip containing space is effectively enlarged, and the function of facilitating chip removal is achieved.)

1. The utility model provides a novel general blind hole boring cutter pole which characterized in that includes:

the surface of a cutter rod main body (1) is provided with an elastic pressure plate (4) and a screw counter bore groove, and the elastic pressure plate (4) and the screw counter bore groove are of a one-piece structure;

the boring cutter head (2), and the surface of the boring cutter head (2) is provided with a long groove, the long groove is connected with an end (5) arranged at one end of the elastic pressure plate (4) in a matching way; and

the compression screw (3) is spirally arranged in the screw counter bore groove and used for positioning and clamping the boring cutter head (2), the bottom of the boring cutter head (2) is provided with a chip removal port, and the chip removal port comprises a counter head part of the compression screw (3), a front angle (6) preset on the surface of the elastic pressing plate (4) and an inclined top surface.

2. The novel universal blind boring bar as claimed in claim 1, wherein: the section of the elastic pressing plate (4) is tongue-shaped, and at least one group of elastic pressing plates (4) is arranged.

3. The novel universal blind boring bar as claimed in claim 1, wherein: the section of the long groove is V-shaped, and the included angle of the inner wall of the long groove is 90 degrees.

4. The novel universal blind boring bar as claimed in claim 1, wherein: and under the state that the elongated slot is matched with the semi-cylindrical surface of the end head (5), the inner hexagonal countersunk surface of the compression screw (3) is tightly attached to the elastic pressure plate (4).

5. The novel universal blind boring bar as claimed in claim 1, wherein: the bottom end of the boring cutter head (2) is designed to be an oblique angle of 5-7 degrees.

Technical Field

The invention belongs to the technical field of blind hole processing, and particularly relates to a novel universal blind hole boring cutter bar.

Background

The existing blind hole processing technical scheme is that one is a square inclined hole side pressing blind hole boring cutter bar, and the other is a universal boring cutter holder clamping and welding boring cutter head;

the side of the square inclined hole is tightly pressed with the blind hole boring cutter bar, only one screw is used for tightly pressing the boring cutter head from the side surface of the cutter bar due to structural limitation, the pressing direction is vertical to the cutter-inserting force direction of the boring cutter head, and the boring cutter head has the factor of not tightly pressing on the basis of the mechanics principle, so that the positioning and clamping of the boring cutter head are unstable and unreliable. In practice, the phenomenon of cutter binding in the cutting process often occurs, so that the condition of cutter beating when the boring cutter head moves is inevitable, and the phenomenon of chip winding and hanging due to the fact that the compression screw protrudes out of the cutter bar is avoided, so that the conditions that the chip containing space is small and the chip removal is unfavorable are formed;

the method for clamping and welding the boring cutter head by the universal boring cutter frame has the structural problem that the integral mass center of the boring cutter frame is radially deviated, the boring cutter frame cannot run at high speed, and the machining efficiency and the surface quality of parts are influenced.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a novel universal blind hole boring cutter bar.

In order to achieve the purpose, the invention adopts the following technical scheme:

a novel universal blind hole boring cutter bar comprises:

the surface of the cutter rod main body is provided with an elastic pressure plate and a screw counter bore groove, and the elastic pressure plate and the screw counter bore groove are of an integral structure;

the surface of the boring cutter head is provided with a long groove, and the long groove is connected with an end head arranged at one end of the elastic pressure plate in a matching way; and

the compression screw is spirally arranged in the screw counter bore groove to position and clamp the boring cutter head, and the bottom of the boring cutter head is provided with a chip removal port which comprises a counter head part of the compression screw, a front angle preset on the surface of the elastic pressure plate and an inclined top surface.

Preferably, the section of the elastic pressing plate is tongue-shaped, and at least one group of elastic pressing plates are arranged.

Preferably, the cross section of the long groove is V-shaped, and the included angle of the inner wall of the long groove is 90 degrees.

Preferably, under the state that the elongated slot is matched with the semi-cylindrical surface of the end head, the inner hexagonal countersunk surface of the compression screw is tightly attached to the elastic pressure plate.

Preferably, the bottom end of the boring cutter head is designed to be an oblique angle of 5-7 degrees.

Compared with the prior art, the invention provides a novel universal blind hole boring cutter bar, which has the following beneficial effects:

the tool bar main body is provided with a tongue-shaped elastic pressing plate and a screw counter bore groove which are connected, the surface of a semi-cylindrical end head of the tongue-shaped elastic pressing plate is in contact fit with the counter bore groove on the boring tool bit, and the positioning and clamping functions of the boring tool bit are realized through a compression screw;

secondly, a positioning mode exceeding a six-point positioning principle is applied to the structural design of the clamping boring cutter head, so that the reliability of positioning constraint is improved; wherein the lower planes of the boring cutter heads are restrained to be positioned at three points; the four-point positioning is restrained between the 90-degree V-shaped long grooves, two repeated points or over-positioning points exist between the seven positioning points, and the positioning restraint is adopted to ensure that the structures are stable, firm and reliable in the machining process;

thirdly, the front angle and the inclined top surface of the tongue-shaped elastic pressing plate and the countersunk head part of the compression screw are utilized, so that the chip containing space is effectively enlarged, the function of facilitating chip removal is achieved, and the problem that the original compression screw of the boring cutter bar is outstandingly wound to pull and hang chips is thoroughly solved.

Drawings

FIG. 1 is a cross-sectional view of the overall construction of the present invention;

fig. 2 is an elevational view of the overall construction of the present invention.

Reference numerals: 1. a cutter bar main body; 2. a boring cutter head; 3. a compression screw; 4. an elastic pressure plate; 5. a tip; 6. a rake angle.

Detailed Description

The following further describes a specific embodiment of the novel universal blind hole boring cutter bar according to the present invention with reference to fig. 1. The novel universal blind boring bar of the present invention is not limited to the description of the following embodiments.

This embodiment provides a concrete structure of novel general blind hole boring cutter pole, as shown in fig. 1-2, a novel general blind hole boring cutter pole includes:

the cutter bar main body 1 is provided with an elastic pressure plate 4 and a screw counter bore groove on the surface, and the elastic pressure plate 4 and the screw counter bore groove are of an integral structure;

the cutter bar body 1 can be a Moire type non-flat external taper shank cutter bar (GR 2-60).

The boring cutter head 2 is provided with a long groove on the surface of the boring cutter head 2, and the long groove is connected with an end head 5 arranged at one end of the elastic pressure plate 4 in a matching way; and

the compression screw 3 is spirally arranged in the screw counter bore groove to position and clamp the boring cutter head 2, and the bottom of the boring cutter head 2 is provided with a chip removal port which comprises a counter bore part of the compression screw 3, a front angle 6 preset on the surface of the elastic pressure plate 4 and an inclined top surface; the front angle 6 is designed to be a concave angle structure, and the inclined top surface of the front angle 6 is communicated with the front angle 6 and is arranged on the surface of the tool holder main body 1.

The novel universal blind hole boring cutter bar designed above aims at the original boring cutter bar, the rigidity of the cutter bar existing during processing of the blind hole is not enough, the clamping and positioning of the cutter head are not firm, and the clamping screw influences the problems of chip removal and small chip containing space.

The solution provided by the invention is as follows: the boring cutter head 2 is clamped by adopting an innovative design structure, the elastic pressing plate 4 is tightly pressed by utilizing a hexagon screw (a pressing screw 3 is arranged at the position) in a countersunk head, and the reliable positioning and clamping operation of the boring cutter head 2 are realized by matching the semi-cylindrical surface of the end 5 of the elastic pressing plate 4 with the 90-degree V-shaped elongated slot on the boring cutter head 2;

compared with the prior boring cutter bar, the boring cutter bar has better integral rigidity, the boring cutter head 3 is positioned more firmly, and particularly, a countersunk head and counter bore screw structure is adopted, so that the chip containing space of the cutter is increased, and the problem that the original boring cutter bar is wound by a compression screw in a protruding manner and pulls chips is thoroughly solved.

The novel universal blind hole boring cutter bar is reasonable, reliable, simple and compact in overall structural design, good in overall rigidity due to the fact that the V-shaped long groove is located and matched with the tongue-shaped elastic pressing plate 4 in a clamping mode, convenient to operate and use due to the fact that the hexagonal screw in the countersunk head is arranged, and further universality of a boring and milling machining cutting function is improved.

The invention has the following functions: the standard Morse taper of the handle part of the cutter bar main body 1 is convenient to connect and mount with a machine tool, and can be widely applied to a numerical control machining center, a numerical control milling machine, and various boring machines, and the machine tool is mainly used for carrying out rough and fine boring and milling machine machining on blind holes, through holes, step holes, grooves or opening steps, internal threads and the like of workpieces;

the novel universal blind hole boring cutter head can conveniently change the type and the angle of the boring cutter head 2, and can carry out fly cutter milling chip processing on a workpiece plane, a step surface, a hole inner bottom plane and a shallow step hole when a side edge milling cutter head is installed; when the radial cutter head is installed, the fly cutter milling processing can be carried out on a groove or a notch in a workpiece hole; and a radial thread tool bit is installed, so that fly cutter milling machining can be performed on the inner thread of the workpiece hole.

In the aspect of application of the invention: the novel universal blind boring cutter bar can be conveniently applied to other machine tools in an expanded mode, the handle position of the Momo type flat outer cone handle is changed into a Momo type cutter bar (GR 2-60) with a flat outer cone handle, and the novel universal blind boring cutter bar can be conveniently connected and installed on common boring machines and drilling machine tools for use; the square handle can be changed at the handle part of the Momo type non-flat external cone, and the Momo type non-flat external cone is conveniently connected and installed on a lathe tool rest for use, so that the processing contents of various corresponding types can be completed;

after the boring cutter head 2 is upgraded and improved to be machined cutter head standardized, the specified type is more convenient to machine and manufacture, and is more convenient to popularize and apply in the machining industry.

As shown in fig. 1 and 2, the cross section of the elastic pressing plate 4 is tongue-shaped, and at least one group of the elastic pressing plates 4 is provided.

As shown in fig. 1, the cross section of the long groove is V-shaped, and the included angle of the inner wall of the long groove is 90 °.

Specifically, the invention perfectly solves the defect of pressing the blind hole boring cutter bar at the side of the oblique hole in the background technology by utilizing the positioning and pressing of the 90 ︒ V-shaped long groove and the structural design of the countersunk head of the compression screw;

according to the 90-degree V-shaped long groove positioning and pressing structure, the boring cutter head 2 is large in positive pressure, long in contact surface and large in pressing torque, so that the integral rigidity is sufficient, the requirements on rough machining and finish machining are completely met, the efficiency of machining parts is high, and the quality of the parts is guaranteed.

As shown in fig. 1, in the state that the elongated slot is matched with the semi-cylindrical surface of the end 5, the inner hexagonal countersunk surface of the compression screw 3 is tightly attached to the elastic pressure plate 4.

As shown in fig. 2, the bottom end of the boring cutter head 2 is designed to be an oblique angle of 5-7 degrees; the design mode can meet the requirements of the bottom boring machining of the blind hole.

In the invention, a positioning mode exceeding a six-point positioning principle is applied in the structural design of the clamping boring cutter head 2, so that the reliability of positioning constraint is increased; wherein the lower planes of the boring cutter heads 2 are restrained to be positioned at three points; the four-point positioning is restrained between the 90-degree V-shaped long grooves, two repeated points or over-positioning points exist between the seven positioning points, and the positioning restraint is adopted to ensure that the structures are stable, firm and reliable in the machining process;

the structure of the boring cutter head clamped by the original square inclined hole boring cutter bar restricts 'three-point positioning' between the lower planes of the boring cutter head; the boring cutter head swings around the center of the screw in the square hole only in a virtual constraint mode, a virtual effective constraint point is lacked, and positioning constraint is few, so that the boring cutter head is easy to move or prick in the machining process.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.