CN202479545U

CN202479545U - Boring machine

Info

Publication number: CN202479545U
Application number: CN201120443002XU
Authority: CN
Inventors: 严怀江; 苏留中; 高智勇
Original assignee: NANJING JINLING SHIPYARD FACTORY CSC
Current assignee: NANJING JINLING SHIPYARD FACTORY CSC
Priority date: 2011-11-10
Filing date: 2011-11-10
Publication date: 2012-10-10
Anticipated expiration: 2021-11-10

Abstract

The utility model relates to a boring machine in the ship industry and especially relates to a boring machine for boring a hole on a ship stern bearing, which aims to solve the problem that during the boring of holes on the front and rear bearings of current 92500T and 30000T series of ship stern axle tubes, the main shaft of a boring machine is not long enough to satisfy the machining requirement on the internal diameters of holes. The utility model provides a boring machine, which comprises a main shaft of the boring machine, a knife rest, a feed screw rod and an axial power drive and power transmission unit I. By being detected and compared with the manufacture engineering requirements on boring holes on ship stern bearings of 92500T and 30000T series in out-of-roundness, non-column-degree, roughness and the like, the boring quality of the boring machine can reach the designed requirements.

Description

A kind of boring machine

Technical field

The utility model relates to a kind of shipbuilding industry and uses boring machine, particularly relates to a kind of boring machine that is used for the processing of ship stern bearing bore hole.

Background technology

Along with the shipbuilding development; The requirement of its ship stern bearing bore hole is also changing thereupon, because after boats and ships were improved to 92500T by 49000T, the requirement of its bore hole changed thereupon; The diameter 200mm that originally uses, length is that the boring row of 5500mm can not satisfy present production, processing needs.So must be to boring row of the special design of the ship stern bearing bore hole of 92500T, thereby most importantly the processing dimension of the bore hole that can guarantee to require on the ship stern tube shaft pipe antero posterior axis bearing of these a series of boats and ships will satisfy the main axis length that adds man-hour.That is to say, must design and make one and have the boring row that the length that meets the rigidity requirement is the 6500mm main shaft.But; According to designing requirement, the jerk value at the main shaft two ends that 6500mm is long is merely 0.03～0.05mm, and out-of-roundness, the post degree all only can not be 0.02～0.03mm; So how can satisfy such main shaft needs; Process, assemble critical pieces such as corresponding turbine, worm screw, screw mandrel according to this main shaft simultaneously, make it can accomplish the making of ship stern bearing bore hole in 92500T and the 30000T boats and ships series, become the present problem that needs solution.

Summary of the invention

The purpose of the utility model is in present 92500T and the processing of 30000T series ship stern tube shaft pipe front and back bearings bore hole; Boring row main axis length falls short of; Problems such as the processing internal diameter is undesirable provide a kind of boring machine to comprise boring row main shaft, knife rest, feed screw mandrel, axial power drive and actuating unit I; Said main shaft is the hollow shaft with through hole, and the internal diameter of said hollow shaft is 60mm, and external diameter is 240mm; The said main shaft outside also is provided with mounting groove; The feed screw mandrel is installed in the said mounting groove, and said feed screw mandrel is fixed through screw mandrel holder and main shaft, and said knife rest moves along the feed screw mandrel; Said axial Power Drive Unit is in main shaft one end, and said actuating unit I is fixed in the main shaft outside, and said actuating unit I is a worm gearing.At first according to the length of 6500mm, the diameter of having confirmed main shaft is 240mm, and in order to improve self rigidity of main shaft, main shaft is set at internal diameter 60mm, the hollow shaft structure of external diameter 240mm.In order to ensure the axially-movable precision of knife rest, said main shaft arranged outside the structure of mounting groove, supply the feed screw mandrel to fix, thereby make knife rest to move along the feed screw mandrel.The dynamical system of this boring machine has two, and one provides the axial Power Drive Unit that knife rest moves vertically, and this device can be feed change unit; Another provides the dynamic structure that main shaft rotates; Mainly be that external motor cooperates the actuating unit I; Thereby utilize the actuating unit I that the power of external motor is converted into the rotatory force of main shaft, and drive the knife rest rotation that is fixed on the main shaft, accomplish the processing of bore hole.

As the improvement of the utility model, the said main shaft outside also is provided with keyway, and said keyway is the movement slots of knife rest.Thereby make knife rest when the feed screw mandrel moves, its structure is embedded in the keyway, and the overall structure of knife rest receives the restriction of keyway during motion, guarantees the stability of knife rest motion.

As the further improvement of the utility model, also include center support bearing on the said boring machine, said center support bearing comprises support body, regulates screw mandrel and actuating unit II.Because the stability of main shaft has determined the uniformity in axle center in the bore hole process, thereby the not post degree of guaranteeing bore hole on the bearing block within the specific limits.

As the improvement further of the utility model, any one in the optional shell type knife rest of said knife rest, Type B knife rest, the plane knife rest.Thereby can select different knife rests according to different processing requests, cooperate different processing cuttves, accomplish the processing of bore hole.

As the further improvement of main shaft stability in the utility model, said center support bearing is two or more.

Certainly, as a kind of selection of axial Power Drive Unit, the utility model discloses said axial Power Drive Unit is feed change unit.

In sum; After adopting technical scheme disclosed in the utility model; Realized the processing in the ship stern tube shaft pipe front and back bearings hole of 92500T and 30000T series boats and ships; And no matter from out-of-roundness, not the post degree, still aspect such as roughness detects contrast, all can meet engine request, reaches designing requirement.

Description of drawings

Fig. 1 is the elevation of the utility model;

Wherein main shaft, 5-knife rest, 6-feed screw mandrel, 7-feed change unit, 8-worm gearing, 9-screw mandrel holder, 10-center support bearing are arranged in 0-hull, 1-front-end bearing pedestal, 2-rear bearing block, 3-stern pipe, 4-boring.

The specific embodiment

Embodiment 1

As shown in Figure 1, boring machine comprises that boring row main shaft 4, knife rest 5, feed screw mandrel 6, axial power drive feed change unit 7 and actuating unit I are worm gearing 8; Said main shaft 4 is for having the hollow shaft of through hole; The internal diameter of said hollow shaft is 60mm; External diameter is 240mm, and the said main shaft outside also is provided with mounting groove, and feed screw mandrel 6 is installed in the said mounting groove; Said feed screw mandrel 6 is fixing with boring row main shaft 4 through screw mandrel holder 9, and said knife rest 5 moves along feed screw mandrel 6; Said feed change unit 7 is installed on boring row main shaft 4 one ends, and said worm gearing 8 is fixed in boring row main shaft 4 outsides.

The boring of above-mentioned boring machine row main shaft 4 is passed front-end bearing pedestal 1, stern pipe 2 and rear bearing block 3 respectively, and be welded and be fixed on the hull 0, form the complete structure among Fig. 1.Before being welded, proofread and correct the center that circle is corrected boring row body according to drawing good two ends in advance, guarantee that boring row body overlaps with the center of circle of proofreading and correct circle as far as possible.

According to pre-set data, center support bearing 10 is adjusted to preset position, start boring row, abnormal vibrations and sound are not arranged, show and install correctly.

The processing cutter is installed on knife rest 5, according to the data of 17 rev/mins of boring row main shaft 4 rotating speeds, feed 0.4mm, is adjusted the motor and the feed change unit 7 that link to each other with turbine and worm transmission device 8 respectively, running is carried out bore hole processing to preceding supporting base 1 and rear branching holder 2.

Processing cutter on the knife rest 5 changed be with nothing left cutter, and the motor that links to each other through worm gearing 8 and the adjustment of feed change unit 7, the rotating speed of boring being arranged main shaft 4 is adjusted into 9 rev/mins, and feed 0.1mm carries out fine finishining.

Remove boring machine, the bore hole that processing obtains is measured, the bore hole out-of-roundness is 0.01～0.015mm, in the long scope of 500mm not the post degree be 0.005～0.015mm, and be along boring, adhering to specification.

Claims

1. boring machine is characterized in that: said boring machine comprises boring row main shaft, knife rest, feed screw mandrel, axially power drive and actuating unit I; Said main shaft is the hollow shaft with through hole, and the internal diameter of said hollow shaft is 60mm, and external diameter is 240mm; The said main shaft outside also is provided with mounting groove; The feed screw mandrel is installed in the said mounting groove, and said feed screw mandrel is fixed through screw mandrel holder and main shaft, and said knife rest moves along the feed screw mandrel; Said axial Power Drive Unit is in main shaft one end, and said actuating unit I is fixed in the main shaft outside, and said actuating unit I is a worm gearing.

2. a kind of boring machine as claimed in claim 1 is characterized in that: the said main shaft outside also is provided with keyway, and said keyway is the movement slots of knife rest.

3. a kind of boring machine as claimed in claim 2 is characterized in that: also include center support bearing on the said boring machine, said center support bearing comprises support body, regulates screw mandrel and actuating unit II.

4. a kind of boring machine as claimed in claim 3 is characterized in that: any one in the optional shell type knife rest of said knife rest, Type B knife rest, the plane knife rest.

5. a kind of boring machine as claimed in claim 3 is characterized in that: said center support bearing is two or more.