CN113976951A

CN113976951A - On-site boring device

Info

Publication number: CN113976951A
Application number: CN202111385695.6A
Authority: CN
Inventors: 王军挺; 梅奇迪; 虞军海
Original assignee: Zhoushan Xinya Shipyard Co ltd
Current assignee: Zhoushan Xinya Shipyard Co ltd
Priority date: 2021-11-22
Filing date: 2021-11-22
Publication date: 2022-01-28

Abstract

A field boring device comprises a boring bar fixed on a workpiece through a bracket, wherein a boring cutter is arranged at one end of the boring bar through a tool rest, and the other end of the boring bar is connected with a power assembly; the supports are arranged in pairs, and the bottoms of the supports are attached to the peripheral surface of the workpiece and locked by chains; one end of the workpiece is provided with a flange seat, a guide seat is arranged on a support close to the flange seat, a power assembly is arranged on a support far away from the flange seat, the power assembly drives the boring rod to rotate and move left and right along the guide seat, and the boring cutter bores an inner hole in the flange seat. The device detachably installs the boring bar and the power assembly on the workpiece through the bracket and the chain, is convenient for directly boring the workpiece on site, solves the problem of repairing the site hole of large and heavy equipment, ensures the reliability and safety of normal operation of the repaired equipment, has simple design, compact mechanism, convenient site installation and stable operation, and has good practical application value.

Description

On-site boring device

Technical Field

The invention relates to an on-site boring device.

Background

On a large ship, a ship tail shaft is generally connected in a multi-section mode, torque transmission is carried out between sections through flange seat connecting bolts, the connecting bolts need to be replaced regularly to ensure the connecting strength, and the tail shaft has the conditions of heavy tonnage, large volume, inconvenience in transportation after disassembly and the like, and is inconvenient to machine on a boring mill, so that the device for conveniently boring holes on the equipment site is needed.

Disclosure of Invention

Aiming at the defects in the problems, the invention provides an on-site boring device.

In order to achieve the aim, the invention provides an on-site boring device which comprises a boring bar fixed on a workpiece through a bracket, wherein one end of the boring bar is provided with a boring cutter through a cutter rest, and the other end of the boring bar is connected with a power assembly;

the supports are arranged in pairs, the bottoms of the supports are abutted against the outer peripheral surface of the workpiece and locked through chains, one ends of the chains are provided with positioning blocks, the positioning blocks are detachably connected with pin shafts on the lower portions of the supports, the other ends of the chains are matched and meshed with chain wheels on the lower portions of the supports, and the chain wheels are limited through positioning pins;

one end of the workpiece is provided with a flange seat, a guide seat is arranged on the support close to the flange seat, the support far away from the flange seat is provided with the power assembly, the power assembly drives the boring rod to rotate and move left and right along the guide seat, and the boring cutter bores holes in the inner hole of the flange seat.

As a further improvement of the invention, the support comprises a main support and an auxiliary support, the main support and the auxiliary support are connected into a whole through connecting blocks, the connecting blocks are arranged in pairs, the pin shafts and the chain wheels are correspondingly arranged outside the connecting blocks and between the main support and the auxiliary support, and the length of the connecting blocks is greater than the width of the positioning blocks.

As a further improvement of the invention, the upper part of the main bracket is higher than the auxiliary bracket, a waist-shaped groove is processed on the upper part of the main bracket, and the guide seat and the power assembly are arranged on the main bracket and the upper and lower positions of the guide seat and the power assembly are adjusted through the waist-shaped groove.

As a further improvement of the invention, the bottom of the bracket is detachably provided with an adjusting block.

As a further improvement of the invention, the adjusting blocks are arranged in pairs and connected with the connecting block through bolts, and the bottoms of the adjusting blocks are arc-shaped.

As a further improvement of the invention, a through hole is radially processed in the middle of the pin shaft, a screw rod part is arranged at the end part of the positioning block, and the screw rod part penetrates through the through hole and then is locked by a nut.

As a further improvement of the invention, the power assembly comprises a motor, the motor is arranged on the bracket and is connected with a push block through a connecting rod, one end of the boring rod penetrates through the motor and then is fixed with the push block, and the push block can slide left and right along the connecting rod.

The invention has the beneficial effects that:

the device detachably installs the boring bar and the power assembly on the workpiece through the bracket and the chain, is convenient for directly boring the workpiece on site, solves the problem of repairing the site hole of large and heavy equipment, ensures the reliability and safety of normal operation of the repaired equipment, has simple design, compact mechanism, convenient site installation and stable operation, and has good practical application value.

Drawings

FIG. 1 is a front view of an in situ boring apparatus of the present invention;

FIG. 2 is an enlarged view at A in bitmap 1;

FIG. 3 is a side view of an in situ boring apparatus of the present invention;

FIG. 4 is an enlarged view at B in FIG. 3;

FIG. 5 is an enlarged view at C of FIG. 3;

fig. 6 is a schematic structural view after the adjusting block 13 is mounted on the boring device;

fig. 7 is an enlarged view at D in fig. 6.

In the figure: 1. boring a rod; 2. boring cutter; 3. a support; 31. a main support; 311. a waist-shaped groove; 32. connecting blocks; 33. an auxiliary support; 34. a pin shaft; 341. a through hole; 4. a guide seat; 5. a motor; 6. a connecting rod; 7. a push block; 8. a workpiece; 81. a flange seat; 9. positioning blocks; 91. a screw section; 10. a chain; 11. a sprocket; 12. positioning pins; 13. and adjusting the block.

Detailed Description

As shown in FIG. 1, the on-site boring device comprises a boring bar 1 fixed on a workpiece 8 through a bracket 3, wherein one end of the boring bar 1 is provided with a boring cutter 2 through a cutter rest, and the other end of the boring bar 1 is connected with a power assembly;

the supports 3 are arranged in pairs, the bottoms of the supports 3 abut against the outer peripheral surface of a workpiece 8 and are locked through chains 10 (see fig. 3), one ends of the chains 10 are provided with positioning blocks 9, the positioning blocks 9 are detachably connected with pins 34 at the lower parts of the supports 3, through holes 341 are radially processed in the middle parts of the pins 34, screw rod parts 91 are arranged at the end parts of the positioning blocks 9, the screw rod parts 91 penetrate through the through holes 341 and are locked through nuts (see fig. 4), the other ends of the chains 10 are matched and meshed with chain wheels 11 at the lower parts of the supports 3, and the chain wheels 11 are limited through positioning pins 12 (see fig. 5);

the support 3 comprises a main support 31 and an auxiliary support 33, the main support 31 and the auxiliary support 33 are connected into a whole through connecting blocks 32, the connecting blocks 32 are arranged in pairs, pin shafts 34 and chain wheels 11 are correspondingly arranged outside the connecting blocks 32 and between the main support 31 and the auxiliary support 33, and the length of the connecting blocks 32 is greater than the width of the positioning blocks 9 (see fig. 2); the upper part of the main support 31 is higher than the auxiliary support 33, a waist-shaped groove 311 is processed on the upper part of the main support 31, the guide seat 4 and the power assembly are arranged on the main support 31 and the upper and lower positions are adjusted through the waist-shaped groove 311, the bottom of the support 3 is detachably provided with the adjusting blocks 13, the adjusting blocks 13 are arranged in pairs and connected with the connecting block 32 through bolts, and the bottom of the adjusting block 13 is arc-shaped (see fig. 6 and 7);

8 one end of work piece is equipped with flange seat 81, install guide holder 4 on the support 3 that is close to flange seat 81, keep away from and install the power assembly on the support 3 of flange seat 81, the power assembly includes motor 5, motor 5 installs on support 3 and connects ejector pad 7 through connecting

rod

6, 1 one end of boring bar passes behind the motor 5 fixed with ejector pad 6, ejector pad 7 can be along connecting rod 6 horizontal slip, the power assembly drives boring bar 1 rotatory and controls along guide holder 4 and remove, boring cutter 2 carries out the bore hole processing to the hole on the flange seat 81.

In particular use, the invention will be described with reference to the accompanying drawings for the convenience of understanding;

in the equipment site, the inner holes of the flange seats of two workpieces are connected in a matched mode through bolts, the bolts are in interference fit with the inner holes, after part of bolts to be replaced are disassembled, a boring device is used for simultaneously boring the two corresponding inner holes, the matching degree of the two inner holes after boring is ensured, the inner holes after boring are firstly connected and fixed through new bolts, and then the rest bolts to be replaced are disassembled and boring operation is carried out; when the chain tightener works, two supports are mounted on one workpiece, after a chain bypasses the workpiece, the free end of the chain is matched and fixed with the chain wheel, the chain wheel is fixed through the positioning pin, and the screw rod portion is pulled upwards through the bolt, so that the chain is tightened up, and the supports are fixed on the workpiece. When the diameter of the workpiece is reduced, the adjusting blocks are installed, and the diameter of the radian formed by the diameters of the two adjusting blocks is smaller than that of the radian below the bracket. The boring bar is arranged between the two brackets, one end of the boring bar, facing the flange seat, penetrates through the guide seat on the bracket and then is provided with the tool rest, the tool rest is provided with the boring tool, the other end of the boring bar penetrates through the bracket and then is connected with the power assembly, a motor in the power assembly is used for driving the boring bar to rotate, the end part of the boring bar is fixed with the push block, the push block drives the boring bar to do linear motion in the left-right direction, and the boring tool correspondingly extends into an inner hole of the flange seat to conduct boring processing.

The torque between the central shaft and the shaft of the ship propulsion shafting is transmitted through the flange connecting bolt. The shafting flange connecting bolt bears the shearing and extrusion of the bolt hole on the flange surface. If the bolt holes of the flange face and the bolts are in clearance fit, uniform stress of the bolts is guaranteed (the form and position tolerance of the bolt holes of the flange face and the bolts is required to be higher and consistent), the contact surface of the bolts and the flange holes is large enough, and the problems that the stress of individual bolts is too large and the stress of individual bolt cylindrical surfaces is uneven can be avoided, so that the interference fit is considered to be a stable design by the inventor.

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.

Claims

1. An on-site boring device is characterized in that: the boring device comprises a boring bar (1) fixed on a workpiece (8) through a support (3), wherein a boring cutter (2) is mounted at one end of the boring bar (1) through a cutter rest, and the other end of the boring bar (1) is connected with a power assembly;

the support frames (3) are arranged in pairs, the bottoms of the support frames (3) are attached to the outer peripheral surface of the workpiece (8) and locked through chains (10), one ends of the chains (10) are provided with positioning blocks (9), the positioning blocks (9) are detachably connected with pin shafts (34) at the lower parts of the support frames (3), the other ends of the chains (10) are matched and meshed with chain wheels (11) at the lower parts of the support frames (3), and the chain wheels (11) are limited through positioning pins (12);

one end of the workpiece (8) is provided with a flange seat (81), a guide seat (4) is installed on the support (3) close to the flange seat (81), the power assembly is installed on the support (3) far away from the flange seat (81), the power assembly drives the boring rod (1) to rotate and move left and right along the guide seat (4), and the boring cutter (2) bores an inner hole in the flange seat (81).

2. An in situ boring device as claimed in claim 1, wherein: the support (3) comprises a main support (31) and an auxiliary support (33), the main support (31) and the auxiliary support (33) are connected through a connecting block (32) to form a whole, the connecting block (32) is arranged in pairs, the main support (31) and the auxiliary support (33) are correspondingly arranged between the pin shaft (34) and the chain wheel (11), and the length of the connecting block (32) is greater than the width of the positioning block (9).

3. An in situ boring device as claimed in claim 2, wherein: the upper portion of the main support (31) is higher than the auxiliary support (33), a waist-shaped groove (311) is machined in the upper portion of the main support (31), and the guide seat (4) and the power assembly are mounted on the main support (31) and are adjusted to be in vertical positions through the waist-shaped groove (311).

4. An in situ boring device as claimed in claim 2, wherein: the bottom of the support (3) is detachably provided with an adjusting block (13).

5. An in situ boring device as claimed in claim 4, wherein: the adjusting blocks (13) are arranged in pairs and connected with the connecting blocks (32) through bolts, and the bottoms of the adjusting blocks (13) are arc-shaped.

6. An in situ boring device as claimed in claim 1, wherein: the middle part of the pin shaft (34) is radially processed with a through hole (341), the end part of the positioning block (9) is provided with a screw rod part (91), and the screw rod part (91) penetrates through the through hole (341) and then is locked by a nut.

7. An in situ boring device as claimed in claim 1, wherein: the power assembly comprises a motor (5), the motor (5) is installed on the support (3) and is connected with a push block (7) through a connecting rod (6), one end of the boring rod (1) penetrates through the motor (5) and then is fixed with the push block (7), and the push block (7) can slide left and right along the connecting rod (6).