CN113118515A

CN113118515A - Diameter-variable precise U-shaped drill rod

Info

Publication number: CN113118515A
Application number: CN202110552963.2A
Authority: CN
Inventors: 梁宇郁; 梁宇江; 姚兑南
Original assignee: Dongguan Chuanshanjia Precision Tool Co ltd
Current assignee: Dongguan Chuanshanjia Precision Tool Co ltd
Priority date: 2021-05-20
Filing date: 2021-05-20
Publication date: 2021-07-16

Abstract

The invention discloses a variable-diameter precise U-shaped drill rod which is provided with a drill rod, wherein the front end of the drill rod forms an installation position, the rear end of the drill rod forms a connecting part, the drill rod is provided with an outer cutting edge cutter installation position and an inner cutting edge cutter installation position, and an included angle alpha is formed between the inner cutting edge cutter installation position and the outer cutting edge cutter installation position; the vertical plane where the outer cutting edge knife mounting position is located is an A plane, the plane where the central axis of the drill rod is located and perpendicular to the A plane is a B plane, the inner cutting edge knife mounting position passes through the B plane, and the outer cutting edge knife mounting position is communicated with the outer peripheral surface of the drill rod; the drill rod outer peripheral face on the spiral chip groove of having seted up, the chip groove degree of depth of connecting in outer sword installation position is less than the chip groove degree of depth of connecting in interior sword installation position. According to the invention, due to the special design of the outer cutting edge mounting position and the inner cutting edge mounting position, the blades with different apertures can be mounted, the cutter bar does not need to be replaced when different apertures are processed, the blades can be directly replaced, and the requirement of a user on the processing aperture can be effectively met.

Description

Diameter-variable precise U-shaped drill rod

Technical Field

The invention relates to the technical field of machining cutters, in particular to a diameter-variable precise U-shaped drill rod.

Background

Drilling tools are used to form cylindrical holes in workpieces formed from metals and other hard materials. The cutting or boring operation of the drilling tool may be performed by an elongated, substantially cylindrical drilling tool, such as a tool holder in combination with a drill insert selectively attached to the tool holder. This arrangement can then be used in applications where one end of the tool holder is securely mounted in a drive device, such as a chuck mechanism of a machine tool, which rotates the tool holder about its longitudinal axis. At the opposite end of the elongated tool holder, the cutting insert engages the workpiece material to be machined. Alternatively, the workpiece may be rotated relative to the tool holder and cutting insert, such as when the tool holder is positioned in the tailstock of a lathe or the like. In addition, both the tool holder and the workpiece may be rotated relative to each other. The use of replaceable cutting inserts allows for quick replacement of the insert as the cutting surfaces wear, rather than the entire tool, and by replacing only the insert rather than the entire drill assembly.

However, in the drilling tool in the prior art, the blades arranged on the tool bar are generally symmetrically arranged, and the chip grooves are equally divided, so that when the drilling tool is used, the resistance to resonance is large, and the service life of the blades is shortened. The applicant has improved the prior art and has proposed the following patent applications.

Disclosure of Invention

In view of this, the invention provides a variable-diameter precise U-drill rod.

In order to achieve the purpose, the invention adopts the following technical scheme: the variable-diameter precise U-drill rod is provided with a drill rod, wherein the front end of the drill rod forms a mounting position for blade assembly, the rear end of the drill rod forms a connecting part, a flange part is formed on the drill rod close to the connecting part, an outer cutting edge knife mounting position and an inner cutting edge knife mounting position are arranged on the drill rod, and an included angle alpha is formed between the inner cutting edge knife mounting position and the outer cutting edge knife mounting position; the vertical plane where the outer cutting edge knife mounting position is located is an A plane, the plane where the central axis of the drill rod is located and perpendicular to the A plane is a B plane, the inner cutting edge knife mounting position passes through the B plane, and the outer cutting edge knife mounting position is communicated with the outer peripheral surface of the drill rod; the drill rod outer peripheral face on the spiral chip groove of having seted up, the chip groove degree of depth of connecting in outer sword installation position is less than the chip groove degree of depth of connecting in interior sword installation position.

In a further technical scheme, a first chip groove connected to the outer cutting edge cutter mounting position is set, a second chip groove connected to the inner cutting edge cutter mounting position is set, and the second chip groove passes through a plane B.

In a further technical scheme, the depths of the first chip groove and the second chip groove are as follows: 6:4.

In a further technical scheme, the value range of the alpha is as follows: 2 to 10 degrees.

In a further technical scheme, the alpha is 5 degrees.

In a further technical scheme, the outer edge cutter mounting position is rotated by 175 degrees to obtain the inner edge cutter mounting position on the basis of the plane where the outer edge cutter mounting position is located, and the inner edge cutter mounting position is not communicated with the outer peripheral surface of the drill rod.

In a further technical scheme, the outer cutting edge mounting position and the inner cutting edge mounting position are arranged on the front end side of the drill rod in a side-to-side mode, and the end face angle of the drill rod is the same as the back angle of the blade.

In a further technical scheme, a side plane is arranged on the connecting part, and the outer blade knife is parallel to the side plane after being assembled on the outer blade knife mounting position.

In a further technical scheme, a clearance position convenient for installing the variable-diameter blade is arranged on the side wall of the outer blade cutter installation position.

In a further technical scheme, a Y-shaped inner cold water tank is arranged on the drill rod.

According to the technical scheme, compared with the prior art, the invention has the following beneficial technical effects: according to the invention, due to the special design of the outer cutting edge mounting position and the inner cutting edge mounting position, the blades with different apertures can be mounted, the cutter bar does not need to be replaced when different apertures are processed, the blades can be directly replaced, and the requirement of a user on the processing aperture can be effectively met.

Other advantageous effects of the present invention are apparent from the detailed description.

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 drill pipe;

FIG. 2 is a schematic structural view of a drill pipe;

FIG. 3 is a schematic view of a top view angle configuration of the drill pipe;

FIG. 4 is a schematic view of a front angle configuration of a drill pipe;

FIG. 5 is a schematic view of the blade assembled to the drill rod;

FIG. 6 is a schematic view of another angular configuration of the blade mounted to the drill rod;

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

In the description of the present application, it is to be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present application. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The variable-diameter precise U-drill rod is shown in fig. 1-2 and comprises a drill rod 100, wherein the drill rod 100 is made of high-hardness metal, the drill rod 100 is used for assembling a blade 200, and meanwhile, the drill rod 100 is connected with an external clamping device and realizes drilling action by driving the drill rod 100 to rotate at a high speed; specifically, the material of the drill rod 100 is H13 high-speed steel, and the heat treatment is carried out until HRC 50-52 degrees, so that the hardness and the toughness are ensured.

The drill rod 100 is formed at a front end thereof with a mounting position for the blade 200 to be assembled, at a rear end thereof with a coupling part 130, and formed adjacent to the coupling part 130 with a flange part 150, the coupling part 130 being mainly used for coupling with a clamping device of a drilling tool.

The front end of the drill rod 100 is vertically provided with an outer cutting edge mounting position 110 and an inner cutting edge mounting position 120, the outer cutting edge mounting position 110 is provided with an outer cutting edge 210, and the inner cutting edge mounting position 120 is provided with an inner cutting edge 220; the vertical opening is a vertical surface along the length direction of the drill rod 100.

The outer cutting edge mounting position 110 and the inner cutting edge mounting position 120 are arranged on the drill rod 100 in a non-centrosymmetric manner, and please refer to fig. 3, wherein a plane parallel to the outer cutting edge mounting position 110 and passing through the axis of the drill rod in fig. 3 is a plane a; perpendicular to plane a and passing through the axis of the drill rod is plane B, and the intersection of plane a and plane B is the center point of drill rod 100.

The outer cutting edge mounting position 110 is arranged on the drill rod 100 and communicated with the outer peripheral wall of the drill rod 100, and meanwhile, the outer cutting edge mounting position 110 does not penetrate through the plane B; the inner cutting edge mounting position 120 is arranged on the drill rod 100 and is not communicated with the peripheral wall of the drill rod 100, but the inner cutting edge mounting position 120 passes through the plane B; from the mechanical point of view, the outer blade mounting position 110 and the inner blade mounting position 120 are not centrosymmetric, are eccentrically arranged, and are not parallel to each other in stress, so that the inner blade mounting position 120 and the outer blade mounting position 110 form an included angle alpha to parallel cutting resistance, and simultaneously have an anti-seismic effect.

In fig. 3, the inner blade mounting position 120 is obtained by rotating 175 ° with reference to the plane of the outer blade mounting position 110, the inner blade mounting position 120 is not communicated with the outer circumferential surface of the drill rod 100, and an included angle α is formed between the inner blade mounting position 120 and the plane a, and the included angle α has a value ranging from 2 ° to 10 °, preferably 5 °, so as to parallel the cutting resistance.

The outer cutting blade mounting portion 110 is connected to the outer peripheral wall and the end wall of the drill rod 100, and the inner cutting blade mounting portion 120 is also connected to the end wall of the drill rod 100, as shown in fig. 4-6, an end surface of the drill rod 100 is formed with an inclination angle β, which is the same as a relief angle of the blade or is a profile design, so as to facilitate cutting and chip removal.

Referring to fig. 1, the sidewall of the outer blade mounting portion 110 is provided with a clearance 111, the clearance 111 is connected to the outside, and the outer blade mounting portion 110 is connected to the outer circumferential wall and the end wall of the drill rod 100, and can be used by mounting blades 200 with different apertures, and the machining aperture can be arbitrarily switched from +0.1, +0.2, +0.3, +0.4, +0.5, +0.6, +0.7, +0.8, +0.9, +1.0 without replacing the cutter bar, so as to effectively meet the requirement of the user for the machining aperture.

The bottoms of the outer cutting edge cutter mounting position 110 and the inner cutting edge cutter mounting position 120 are of a plane structure, so that the cutting effect is better matched with the cutting blade, and the cutting effect is effectively improved.

When the tool is used, the tool rotates along a parallel line (plane A) with the center of the outer blade 210, the inner blade 220 passes through the center of the drill stem 100, during machining, a workpiece is firstly contacted and cut, grading cutting is formed between the inner blade and the outer blade, the load and cutting resistance of a machine tool are reduced, the outer blade has the functions of controlling the hole diameter and the hole finish degree besides cutting, the second chip groove 142 on one side of the inner blade 220 is required to be a bit deeper, and the first chip groove 141 of the outer blade 210 is required to be a bit shallower by taking the center line of the tool as a reference.

Furthermore, the drill rod 100 is spirally provided with a chip removal groove 140 on the outer circumferential surface thereof, a first chip removal groove 141 is provided to be connected to the outer blade mounting position 110, a second chip removal groove 142 is provided to be connected to the inner blade mounting position 120, and both the first chip removal groove 141 and the second chip removal groove 142 extend from the corresponding mounting positions to the flange portion 150, so that chip removal is still smooth when the drill rod is machined to the limit depth.

The first chip groove 141 and the second chip groove 142 have different depths, and because the outer blade mounting position 110 and the inner blade mounting position 120 have different mounting positions, the inner blade mounting position 120 passes through a plane B, while the outer blade mounting position 110 does not pass through the plane B, accordingly, the depth of the first chip groove 141 connected to the outer blade mounting position 110 is smaller than the depth of the second chip groove 142 connected to the inner blade mounting position 120; after multiple tests, the depth ratio of the first chip groove 141 to the second chip groove 142 is determined as follows: 6:4, so that a better chip removal effect and force balance can be achieved.

The connecting portion 130 is provided with a side plane 131, the outer blade 210 is assembled behind the outer blade mounting position 110, the outer blade 210 is parallel to the side plane 131, and the lathe machining is convenient to carry out, so that the drilling and boring functions are realized.

The drill rod 100 is provided with the Y-shaped inner cooling water tank 101, so that high temperature generated during machining is effectively reduced, the drill rod is directly cooled to the blade part, and the service life of the blade is prolonged.

The connecting portion 130 is provided with a thread of a pipe thread, so that the connecting portion can be conveniently connected with an external clamping device.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. But the accurate U of reducing bores the drilling rod, has the drilling rod, and the front end of drilling rod forms the installation position that is used for the blade assembly, and the rear end of drilling rod forms connecting portion, is close to on the drilling rod to be formed with flange portion, its characterized in that in connecting portion: the drill rod is provided with an outer cutting edge cutter mounting position and an inner cutting edge cutter mounting position, and an included angle alpha is formed between the inner cutting edge cutter mounting position and the outer cutting edge cutter mounting position;

the vertical plane where the outer cutting edge knife mounting position is located is an A plane, the plane where the central axis of the drill rod is located and perpendicular to the A plane is a B plane, the inner cutting edge knife mounting position passes through the B plane, and the outer cutting edge knife mounting position is communicated with the outer peripheral surface of the drill rod;

the drill rod outer peripheral face on the spiral chip groove of having seted up, the chip groove degree of depth of connecting in outer sword installation position is less than the chip groove degree of depth of connecting in interior sword installation position.

2. The variable diameter precision U-drill rod of claim 1, wherein: and setting a first chip removal groove connected to the outer blade mounting position, and a second chip removal groove connected to the inner blade mounting position, wherein the second chip removal groove passes through the plane B.

3. The variable diameter precision U-drill stem of claim 2, wherein: the depth of the first chip groove and the second chip groove is as follows: 6:4.

4. The variable diameter precision U-drill rod of claim 1, wherein: the value range of the alpha is as follows: 2 to 10 degrees.

5. The variable diameter precision U-drill pipe of claim 4, wherein: the alpha is 5 degrees.

6. The variable diameter precision U-drill rod of claim 1, wherein: and the plane of the outer edge cutter mounting position is taken as a reference, the inner edge cutter mounting position is obtained by rotating 175 degrees, and the inner edge cutter mounting position is not communicated with the outer peripheral surface of the drill rod.

7. The variable diameter precision U-drill rod of claim 1, wherein: the outer cutting edge cutter mounting position and the inner cutting edge cutter mounting position are arranged on the front end side of the drill rod in the opposite direction, and the end face angle of the drill rod is the same as the back angle of the blade.

8. The variable diameter precision U-drill rod of claim 1, wherein: the connecting part is provided with a side plane, and the outer blade knife is parallel to the side plane after being assembled at the outer blade knife mounting position.

9. The variable diameter precision U-drill rod of claim 1, wherein: and the side wall of the outer blade cutter mounting position is provided with a clearance avoiding position which is convenient for mounting the reducing blade.

10. The variable diameter precision U-drill rod of claim 1, wherein: and a Y-shaped inner cold water tank is arranged on the drill rod.