CN215941539U

CN215941539U - Boring bar joint

Info

Publication number: CN215941539U
Application number: CN202122506639.5U
Authority: CN
Inventors: 黄迁; 李从芳; 付达; 陈冬亚; 张军
Original assignee: Yichang Yuneng Precision Technology Co ltd
Current assignee: Yichang Yuneng Precision Technology Co ltd
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2022-03-04
Anticipated expiration: 2031-10-15

Abstract

The utility model provides a boring bar joint, which comprises a joint body; a central hole is arranged in the connector body in a penetrating way; a first thread area is arranged on the surface of the inner wall of the central hole at the thicker end of the joint body; the outer surface of the thinner end of the joint body is provided with a second threaded area and a limit shoulder; the limiting shoulder portions are arranged in a stepped transition mode along the direction far away from the second threaded area, the wall thickness portion of the joint body can be fully utilized, and the overall bending resistance of the connecting portion of the joint body and the boring rod is remarkably improved.

Description

Boring bar joint

Technical Field

The utility model belongs to the technical field of boring and drilling, and particularly relates to a boring bar joint.

Background

The boring bar joint is used for connecting two boring bars, and when deep hole machining is carried out, the boring bar hole is deep and fine, so that the boring bar is easy to bend, the boring bar can rub in the inner hole to reduce the service life, and the drilling precision can be influenced. The bending stress generally occurs at the joint of the two boring bars, so that the boring bar joint with excellent bending resistance and enhanced heat dissipation function is invented by improving the conventional boring bar joint structure.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides the boring bar joint which has excellent bending resistance and enhanced heat dissipation function.

In order to achieve the purpose, the utility model adopts the following technical scheme: a boring bar joint comprises a joint body; a central hole is arranged in the connector body in a penetrating manner; a first threaded area is arranged on the surface of the inner wall of the central hole at the thicker end of the joint body; the outer surface of the thinner end of the joint body is provided with a second threaded area and a limiting shoulder; the limiting shoulder is provided with a plurality of limiting shoulders in a stepped transition mode along the direction far away from the second threaded area.

Further, the first thread area and the second thread area both adopt double-start rectangular threads.

Further, the outer surface of the joint body is provided with a guide block in a connecting way; the guide block is of a strip-shaped structure; the guide block is arranged in parallel with the joint body; the guide blocks are evenly distributed around the joint body at intervals.

Further, the number of the guide blocks on the surface of the joint body is 4.

Further, the guide block comprises a first clamping plate, a second clamping plate and a heat conducting strip; the heat conducting strip is clamped between the first clamping plate and the second clamping plate; the heat conducting strip is attached to the outer surface of the joint body and is in heat transfer contact with the outer surface of the joint body; a positioning screw hole is formed in the first clamping plate along the thickness direction of the first clamping plate; fastening screws are arranged inside the positioning screw holes in a matched and connected mode; the embedded end of the fastening screw tightly pushes the heat conducting strip.

Furthermore, the opening of the positioning screw hole is provided with a sinking groove in an outward expansion mode.

Further, one side of the heat conducting strip, which is far away from the joint body, extends to the outside of the gap between the first clamping plate and the second clamping plate.

Compared with the prior art, the utility model has the beneficial effects that:

(1) according to the utility model, the double-ended rectangular threads at the two ends of the joint body are matched with the stepped transition type shoulder parts, so that the integral bending resistance of the joint body and the connecting part of the boring rod is obviously improved;

(2) according to the utility model, the guide blocks which are uniformly distributed in parallel are arranged outside the joint body, so that the bending resistance of the structure body is obviously enhanced, the dynamic balance design of the whole boring bar joint during rotation is considered through the annularly and uniformly distributed layout mode, and the phenomenon that the rotating centrifugal force of the guide blocks aggravates the bending of the joint body is avoided;

(3) the guide block in the utility model utilizes the matching of the clamping plate structure and the guide strip, thereby obviously enhancing the overall heat dissipation performance of the boring bar joint and obviously improving the process compatibility.

Drawings

FIG. 1 is a schematic view of a joint body according to the present invention;

FIG. 2 is a detail view of the construction of the connector body of the present invention;

FIG. 3 is a cross-sectional view of the fitting body of the present invention;

FIG. 4 is a schematic view of the positioning of the guide block of the present invention;

FIG. 5 is an end view of a guide block of the present invention;

fig. 6 is a schematic view of the overall structure of the guide block of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the connector comprises a connector body, 11, a first thread area, 12, a second thread area, 13, a limiting shoulder, 2, a central hole, 3, a guide block, 31, a first clamping plate, 32, a second clamping plate, 33, a heat conduction strip, 34, a positioning screw hole, 35, a fastening screw, 36 and a sinking groove.

Detailed Description

The present invention is further described in detail below with reference to specific examples so that those skilled in the art can more clearly understand the present invention.

As shown in fig. 1 to 3, a boring bar joint includes a joint body 1; a central hole 2 is arranged in the joint body 1 in a penetrating manner; the surface of the inner wall of the central hole 2 at the thicker end of the joint body 1 is provided with a first threaded area 11; the outer surface of the thinner end of the joint body 1 is provided with a second threaded area 12 and a limit shoulder 13; the limit shoulder 13 is provided with a plurality of limit shoulders in a stepped transition along the direction far away from the second thread area 12.

The joint body 1 is connected with the boring bars at two ends through the first thread area 11 and the second thread area 12 respectively, the threads at the thinner ends are arranged on the outer surface, and the threads at the thicker ends are arranged on the inner surface, so that the bending resistance of the end part of the joint body can be obviously improved, meanwhile, the limiting shoulder part 13 has the function of providing the assembling positioning in the length direction for the end surface of the boring bar at the corresponding end, and the mounting stability is improved; the plurality of limiting shoulders 13 can utilize the wall thickness part with larger length, and the integral bending resistance of the connecting part of the thinner end of the joint body and the boring bar is improved through the multi-shoulder structure during step transition.

The first threaded zone 11 and the second threaded zone 12 both employ double rectangular threads.

The double-end rectangular thread has the advantages that extremely high transmission efficiency can be obtained, and the problem that the boring cutter cutting force is insufficient due to the adapter of the joint structure is avoided.

As shown in fig. 4, the outer surface of the joint body 1 is provided with a guide block 3; the guide block 3 is of a strip-shaped structure; the guide block 3 is arranged in parallel with the joint body 1; a plurality of the guide blocks 3 are evenly distributed around the joint body 1 at intervals.

The position shown by a dotted line frame in the figure is the installation position of the guide block 3, and the guide block 3 can play a role similar to a reinforcing rib, so that the bending resistance of the structure body is obviously enhanced; and the distribution mode of annular equipartition then can compromise the whole dynamic balance when rotating of boring bar joint, otherwise the rotatory centrifugal force of guide block 3 self can aggravate the crooked phenomenon of joint body on the contrary.

The number of the guide blocks 3 on the surface of the joint body 1 is 4.

At the moment, the included angle between the adjacent guide blocks 3 is 90 degrees, namely the boring bar joints can be stably placed on a plane in a pairwise mode, and all directions of bending deformation are effectively considered.

As shown in fig. 5 to 6, the guide block 3 includes a first clamping plate 31, a second clamping plate 32, and a heat conduction bar 33; the heat conducting strip 33 is clamped between the first clamping plate 31 and the second clamping plate 32; the heat conducting strip 33 is attached to the outer surface of the joint body 1 for heat transfer contact; a positioning screw hole 34 is formed in the first clamping plate 31 along the thickness direction of the first clamping plate; a fastening screw 35 is arranged inside the positioning screw hole 34 in a matching and connecting manner; the embedded end of the fastening screw 35 presses the heat conduction bar 33 tightly.

As can be seen in fig. 5, the first clamping plate 31 and the second clamping plate 32 are arc-shaped surfaces on the sides close to the joint body, and can be in fit contact with the structural body to ensure the connection strength; the guide block 3 and the joint body 1 can be integrally connected in a heat-preservation way in a brazing way, so that the deformation of the base metal caused in the welding process can be obviously controlled; the heat conducting strip 33 is used for absorbing and dissipating heat on the joint body, and the heat dissipation capacity of the boring bar joint is improved. The heat conducting strip 33 can be freely assembled and disassembled according to processing tasks, and the disassembly and assembly efficiency can be obviously improved through the screw jacking mode, so that the fastening screw and the heat conducting strip are taken down when heat dissipation is not required to be additionally improved, and the self weight of the boring bar joint is reduced.

And a sunk groove 36 is formed in the opening of the positioning screw hole 34 in an outward expansion mode.

The function of the sunken groove 36 is to allow the tail of the fastening screw 35 to be completely submerged, so as to avoid exposing sharp objects on the surface of the guide block, and significantly improve the use safety of the guide block.

The side of the heat conducting strip 33 away from the joint body 1 extends to the outside of the gap between the first clamping plate 31 and the second clamping plate 32.

The heat conducting strip 33 can contact with the surrounding air in rotation by utilizing the part extending out of the other side after absorbing the heat from the joint body, thereby further improving the heat dissipation efficiency; the length that it stretches out can be controlled according to the heat dissipation demand, or will stretch out the part and buckle the laminating on the surface of first splint or second splint to further promote the safety in utilization.

The mechanisms, components and parts of the present invention which are not described in detail are all the existing structures which exist in the prior art. Can be purchased directly from the market.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. 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.

Claims

1. A boring bar joint is characterized in that: comprises a joint body (1); a central hole (2) is arranged in the joint body (1) in a penetrating way; a first threaded area (11) is arranged on the surface of the inner wall of the central hole (2) at the thicker end of the joint body (1); the outer surface of the thinner end of the joint body (1) is provided with a second threaded area (12) and a limit shoulder (13); the limiting shoulder (13) is provided with a plurality of limiting shoulders in a stepped transition mode along the direction far away from the second threaded area (12).

2. The boring bar joint as set forth in claim 1, wherein: the first threaded zone (11) and the second threaded zone (12) both adopt double-start rectangular threads.

3. The boring bar joint as set forth in claim 1, wherein: the outer surface of the joint body (1) is connected with a guide block (3); the guide block (3) is of a strip-shaped structure; the guide block (3) is arranged in parallel with the joint body (1); the guide blocks (3) are uniformly distributed around the joint body (1) at intervals.

4. The boring bar joint as set forth in claim 3, wherein: the number of the guide blocks (3) on the surface of the joint body (1) is 4.

5. The boring bar joint as set forth in claim 3, wherein: the guide block (3) comprises a first clamping plate (31), a second clamping plate (32) and a heat conducting strip (33); the heat conducting strip (33) is clamped between the first clamping plate (31) and the second clamping plate (32); the heat conducting strip (33) is attached to the outer surface of the joint body (1) for heat transfer contact; a positioning screw hole (34) is formed in the first clamping plate (31) along the thickness direction of the first clamping plate; a fastening screw (35) is arranged in the positioning screw hole (34) in a matching and connecting manner; the embedded end of the fastening screw (35) tightly pushes the heat conduction strip (33).

6. The boring bar joint as set forth in claim 5, wherein: and a sunk groove (36) is formed in the opening of the positioning screw hole (34) in an outward expansion mode.

7. The boring bar joint as set forth in claim 5, wherein: the side, far away from the joint body (1), of the heat conduction strip (33) extends to the outside of a gap between the first clamping plate (31) and the second clamping plate (32).