CN113182568A

CN113182568A - Special milling machine for machining after rotary welding of tower crane and machining method

Info

Publication number: CN113182568A
Application number: CN202110424037.7A
Authority: CN
Inventors: 罗宇德; 覃重闪; 韦亮; 樊伟杰; 李华团; 李凯华; 覃富德; 黄卫国
Original assignee: Guangxi Construction Engineering Group Construction Machinery Manufacturing Co Ltd
Current assignee: Guangxi Construction Engineering Group Construction Machinery Manufacturing Co Ltd
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2021-07-30

Abstract

The invention discloses a special milling machine for machining after rotary welding of a tower crane and a machining method. According to the invention, the rotary support rotates and drives the workpiece to rotate, and the milling cutter disc is used for milling the processing surface of the workpiece, so that the circular feeding path can be matched with the processing surface of the workpiece, the workpiece can be processed quickly and efficiently, the production efficiency is high, and the pertinence is strong. The problems that the existing milling machine is poor in pertinence of machining after the tower crane is subjected to rotary welding, machining precision of the milling machine is too rich, a clamping structure is complex, time and labor are wasted in a clamping process, labor intensity of workers is high, and production efficiency is low are solved.

Description

Special milling machine for machining after rotary welding of tower crane and machining method

Technical Field

The invention belongs to the technical field of machining, and particularly relates to a special milling machine and a machining method for machining after rotary welding of a tower crane.

Background

Milling machine, mainly refer to the lathe that processes multiple surfaces of work piece with the milling cutter, the milling cutter uses the rotary motion as the main motion usually, the movement of work piece and milling cutter is the feed motion, the milling machine mainly is divided into desk-top milling machine, cantilever type milling machine, ram type milling machine, planer type milling machine, flat milling machine, etc., it is a machine tool that has wider usage, it not only can process various planes, slot, can process curved surface, more complicated profile such as the gear, etc., in addition can also be used for processing and cutting off work, etc. to the surface of revolution body, hole, its rigidity is good, the weight is high, the machining precision is high, and efficiency is higher than the lathe planing, get the wide application in the mechanical manufacturing and repair department, wherein apply to the machine tool after the machine tool of the gyration tower machine tool is the planer type milling machine, but it still has the following drawback in the actual use:

1. the existing milling machine is a general milling machine, the processing pertinence after the rotary welding of the tower crane is not strong, for example, when the gantry milling machine is used for processing, a feeding path is a straight line, a rotary processing surface is a ring-shaped surface, a surface to be processed can be processed only by going straight lines for many times, the number of times of pause is more, and the production efficiency is low;

2. the existing milling machine is generally provided with a plurality of finish machining functions for meeting the machining requirements of various precise workpieces, and the functions are not needed when a tower crane rotary welding piece is machined, for example, the power head is lifted in a large size, the machining precision is too rich, the equipment investment in the early stage is high, and the cost performance is not high;

3. the clamping structure of the existing milling machine cannot be well adapted to a tower crane rotary welding part, the clamping structure is complex, time and labor are wasted in the clamping process, the labor intensity of workers is high, and the production speed is reduced.

Therefore, the existing special milling machine for machining after the rotary welding of the tower crane cannot meet the requirements in practical use, so that an improved technology is urgently needed in the market to solve the problems.

Disclosure of Invention

The invention aims to provide a special milling machine for machining after rotary welding of a tower crane, which solves the problems of low pertinence of the existing milling machine to the machining after rotary welding of the tower crane, excessive allowance of milling machine machining precision, high equipment investment in the early stage, complex clamping structure, time and labor waste in the clamping process, high labor intensity of workers and low production efficiency through a supporting base, a slide rail, a power head and a rotary fixing device.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a special milling machine for machining after rotary welding of a tower crane, which comprises a support base, a slide rail, a power head and a rotary fixing device, wherein the slide rail is fixedly welded on the upper side of the support base, the slide rail is provided with a sliding table, the lower end of the rotary fixing device is arranged on the slide rail through the sliding table, the upper end of the slide rail is in rotary connection with the rotary fixing device, when the special milling machine is used for machining after rotary welding of the tower crane, a feeding path is circular and is matched with the annular surface of a workpiece machining surface, all machining surfaces are machined after a circle, the production efficiency is improved in times, the pertinence is strong, the power head is fixedly welded on the upper end of the rotary fixing device on the upper side of the support base, the lower end of the power head is in rotary connection with a milling cutter disc, the workpiece can be rapidly milled through the milling cutter disc, and the vertical displacement of the milling cutter disc is suitable for machining the workpiece, compared with a general milling machine, the milling machine has the advantages of simple structure, lower equipment cost, capability of greatly reducing the early investment of the equipment and high cost performance.

Furthermore, a rack is arranged on one end side portion of the supporting base, the rack is provided with a vertical supporting portion and a horizontal supporting portion, the lower end of the vertical supporting portion of the rack is arranged on one end side portion of the supporting base, the horizontal supporting portion of the rack excessively extends to the position above the sliding table along the arc shape of the upper end of the vertical supporting portion, a power head is arranged on the horizontal supporting portion of the rack, the upper end of the power head is arranged on the horizontal supporting portion of the rack, the lower end of the power head is perpendicular to the upper surface of the supporting base, the sliding rail is located at the other end of the supporting base, and the supporting base is firmly installed on a reinforced concrete foundation, so that the supporting base is located on the horizontal plane, and machining accuracy is improved.

Furthermore, the sliding table is connected to the upper side of the sliding rail in a clamped mode, the upper surface of the supporting plate is perpendicular to a power head on a horizontal supporting portion of the rack, and a main shaft of the power head is perpendicular to the upper surface of the supporting plate. The sliding table can realize the left and right movement of the workpiece through the sliding rail, so that the power head can conveniently process the workpiece, the labor intensity of workers is reduced, and the processing speed is increased.

Furthermore, a slewing bearing is arranged on the sliding table, a plurality of slewing fixing devices are arranged at intervals along the edge of the upper surface of the slewing bearing, and the lower surfaces of the slewing fixing devices are screwed and fixed on the edge of the upper surface of the slewing bearing.

Furthermore, a rotary driving mechanism is fixedly screwed at one end of the rotary support, and an output shaft of the rotary driving mechanism is in transmission connection with the rotary support through a driving gear.

Furthermore, a supporting plate is fixed on the outer side of the sliding table below the slewing bearing, a supporting frame is arranged on the lower surface of the end portion of the supporting plate, the supporting frame is welded and fixed on the lower surface of the supporting plate, and the slewing driving mechanism is arranged at the upper end of the supporting frame. The rotary fixing device realizes that the feeding path is circular through the rotary driving mechanism and can be matched with the processing surface of the workpiece, so that the workpiece can be processed quickly and efficiently, the production efficiency is high, and the pertinence is strong.

Furthermore, clamping components fixed with workpieces are arranged on the rotary fixing devices respectively, the clamping components are welded and fixed to the centers of the upper ends of the rotary fixing devices, the workpieces are fixedly connected to the upper sides of the rotary fixing devices in a screwed mode, the edges of the workpieces can be fixed through the rotary fixing devices, the clamping components can further clamp the workpieces, the workpieces are stable during machining, and the rotary fixing devices are easy to operate and strong in pertinence.

The invention has the following beneficial effects:

1. the rotary fixing device is arranged, so that the problems that the existing milling machine is a universal milling machine and the processing pertinence to the rotary welding of the tower crane is not strong, for example, when the gantry type milling machine is used for processing, the feeding path is a straight line, the rotary processing surface is an annular surface, the to-be-processed surface can be processed only by going straight lines for many times, the number of times of pause is large, the production efficiency is low are solved, the feeding path of the rotary fixing device is circular and is matched with the annular surface of the processing surface of the workpiece, all the processing surfaces are processed after going one circle, and the production efficiency is improved by times.

2. The invention solves the problems that the existing milling machine is generally provided with a plurality of fine machining functions for meeting the processing requirements of various precise workpieces, and the functions do not need to be used for processing the rotary welding piece of the tower crane, such as large-size lifting of the power head and excessive margin of processing precision, thereby causing higher equipment early-stage investment and low cost performance by arranging the supporting base, the sliding rail, the power head and the rotary fixing device.

3. The rotary fixing device is arranged, so that the problems that the clamping structure of the existing milling machine cannot be well adapted to a rotary welding part of a tower crane, the clamping structure is complex, time and labor are wasted in the clamping process, the labor intensity of workers is high, and the production speed is reduced are solved.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a front view of the present invention;

FIG. 2 is a side view of the present invention;

FIG. 3 is a top view of the present invention;

fig. 4 is a structural view of the support base and the slide rail of the present invention.

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

1. a support base; 101. a frame; 2. a slide rail; 201. a sliding table; 202. a support plate; 3. a power head; 301. a milling cutter disc; 4. a rotation fixing device; 401. a slewing bearing; 402. a clamping assembly; 403. a rotation driving mechanism; 403a, a drive gear; 404. a support frame; 5. and (5) a workpiece.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to fig. 1-4, the invention relates to a special milling machine for machining after rotary welding of a tower crane, which comprises a support base 1, a slide rail 2, a power head 3 and a rotary fixing device 4, wherein the slide rail 2 is fixedly welded on the upper side of the support base 1, a slide table 201 is arranged on the slide rail 2, the lower end of the rotary fixing device 4 is arranged on the slide rail 2 through the slide table 201, the upper end of the slide table 201 is screwed with the rotary fixing device 4, the power head 3 is arranged on the upper side of the support base 1 and positioned on the upper end of the rotary fixing device 4 in a welding manner, the lower end of the power head 3 is screwed with a milling cutter disc 301, workpieces can be rapidly milled through the milling cutter disc, the vertical displacement of the power head to the milling cutter disc is suitable for machining the workpieces, the vertical distance does not need to be adjusted, the pertinence is strong, and the production efficiency is high. When the rotary milling machine is used for processing, the feeding path is circular and is matched with the annular surface of the processing surface of the workpiece 5, all the processing surfaces are processed after one circle, the power head 3 is fixedly welded at the upper end of the rotary fixing device 4 on the upper side of the supporting base 1, and the power head 3 can mill the processing surface of the workpiece 5.

Wherein as shown in fig. 1 and 4, the one end lateral part of the supporting base 1 is provided with a frame 101, the frame (101) has a vertical supporting part and a horizontal supporting part, the lower end of the vertical supporting part of the frame 101 is arranged at the one end lateral part of the supporting base 1, the horizontal supporting part of the frame 101 excessively extends to the upper part of the sliding table 201 along the upper end arc of the vertical supporting part, the horizontal supporting part of the frame 101 is provided with a power head 3, the upper end of the power head 3 is arranged on the horizontal supporting part of the frame 101, the lower end of the power head 3 is perpendicular to the upper surface of the supporting base 1, the slide rail 2 is arranged at the other end (relative to one end of the frame 101) of the supporting base 1, the supporting base 1 is firmly arranged on a reinforced concrete foundation, the left and right movement of a workpiece 5 can be realized through the slide rail 2, the processing of the power head 3 to the workpiece 5 is convenient, the up and down displacement of the power head 3 to the milling cutter 301 is suitable for the processing of the workpiece 5, the workpiece 5 can be milled rapidly by the milling cutter disc 301.

Wherein as shown in fig. 2-3, slip table 201 joint is in slide rail 2 upside, unit head 3 on the horizontal support portion of slip table 201 upper surface perpendicular to frame 101, unit head 3 main shaft perpendicular to slip table 201 and the plane at support base 1 place guarantee that milling cutter dish 301 carries out milling process parallelly to work piece 5 when the horizontal plane rotates, be provided with slewing bearing 401 on the slip table 201, set up a plurality ofly along slewing bearing 401's upper surface edge interval slewing fixing device 4, slip table 201 slides in-process and drives slewing bearing 401 and slide and be close milling cutter dish 301 fixes the back, mills work piece 5, can carry out the pending processing of many times rectilinear processing face, realizes the work piece firm when processing man-hour, easy operation, with strong points, slewing bearing 4 lower surface connects soon to fix at slewing bearing 401's upper surface edge slewing bearing one end 401 connects soon to be fixed with rotary drive mechanism 403, the output shaft of slewing drive mechanism 403 pass through drive gear 403a with slewing bearing 401 transmission is connected the slip table 201 outside of slewing bearing 401 below is fixed with backup pad 202 be provided with support frame 404 on the tip lower surface of backup pad 202, support frame 404 welded fastening is in backup pad 202 lower surface, slewing drive mechanism 403 sets up in the support frame 404 upper end, drives slewing bearing 401 through slewing drive mechanism 403 and rotates, and slewing bearing 401 drives slewing fixing device 4's gyration, realizes that the route of feeding is circular, can be identical with the machined surface of work piece 5.

As shown in fig. 2, the rotary fixing devices 4 are respectively provided with a clamping assembly 402 for fixing the workpiece 5, the clamping assembly 402 is welded and fixed at the center of the upper end of the rotary fixing device 4, the workpiece 5 is screwed and fixed at the upper side of the rotary fixing device 4, the clamping assembly 402 is screwed and fixed at the center of the lower side of the workpiece 5, the edge of the workpiece 5 can be fixed by the rotary fixing device 4, and the clamping assembly 402 can further clamp the center of the workpiece 5, so that the workpiece 5 can be stably processed.

In the invention, the milling method by using the special milling machine for machining after the rotary welding of the tower crane comprises the following steps: installing various parts, firmly installing a support base (1) on a foundation, fixedly connecting a sliding table 201 and a sliding rail 2 with the support base 1, installing a rotary fixing device 4 on a rotary support 401, installing a rack 101 at one end of the support base 1, and enabling a power head 3 on a horizontal supporting part of the rack 101 to be vertical to the surface of the rotary support 401 downwards; debugging each component, starting the rotary driving mechanism 403, rotating forwards and backwards for one circle, enabling the sliding table 201 to move back and forth on the sliding rail 2 once, starting the power head 3 to move up and down once, and driving the milling cutter disc 301 to rotate for 30 seconds; adjusting the workpiece 5 to be mounted and machined, and clamping the workpiece 5 on the clamping assembly 402 of the rotary fixing device 4; the rotary fixing device 4 is operated in a trial mode, the rotary driving mechanism 403 drives the rotary fixing device 4 to rotate forward and backward for one turn, the sliding rail 2 is operated in a trial mode, the sliding table 201 reciprocates on the upper side of the sliding rail 2 once, the power head 3 is operated in a trial mode, the milling cutter disc 301 moves up and down once and rotates for 30 seconds, after all the trial operations in different parts are normal, the workpiece 5 is hung to the upper side of the rotary fixing device 4, the relevant position is adjusted, the workpiece 5 is clamped and fixed through the rotary fixing device 4 and the clamping assembly 402, the workpiece 5 is stable during processing, the operation is simple and strong in pertinence, the sliding table 201 is started to move to the corresponding position, the horizontal distance from the milling cutter disc 301 is 20-40mm, the operation is suspended, the milling cutter disc 301 extends downwards to the corresponding length, the milling amount of the first-time cutter is met, the milling cutter disc 301 is started to rotate, and the rotating speed of the milling cutter disc 301 is not lower than 300 rpm; milling a workpiece 5, starting a sliding rail 2 and moving the sliding rail 2 to a milling through ring surface of the workpiece 5, wherein the feeding speed of the sliding rail 2 is 1mm-3mm/s, so that the center of a milling cutter disc 301 is positioned on the center line between the inner ring and the outer ring of the workpiece 5, locking a sliding table 5, starting a rotary driving mechanism 403 to drive a rotary support 401 to rotate, the rotating speed of the rotary support 401 is lower than that of the milling cutter disc 301, the workpiece 5 on a rotary fixing device 4 is driven to mill the ring surface in the rotating process, the feeding path is circular through the rotary driving mechanism 403, and can be matched with the processing surface of the workpiece 5, so that the workpiece 5 can be processed quickly and efficiently, the production efficiency is high, and the pertinence is strong; after milling of the ring surface of the workpiece 5 is completed, the slewing bearing driving mechanism 8 stops running, the milling cutter disc 301 stops rotating and retracts, and the sliding rail 2 retracts to the original position; compared with a universal milling machine, the rotary milling machine has the advantages that the structure is simple, the pertinence is strong, the equipment cost is low, the early-stage investment of the equipment can be greatly reduced, and the cost performance is high; the problems that the existing milling machine is poor in pertinence of machining after the tower crane is subjected to rotary welding, machining precision of the milling machine is too rich, a clamping structure is complex, time and labor are wasted in a clamping process, labor intensity of workers is high, and production efficiency is low are solved.

The above are only preferred embodiments of the present invention, and the present invention is not limited thereto, and any modification, equivalent replacement, and improvement made to the technical solutions described in the above embodiments, and to some of the technical features thereof, are included in the scope of the present invention.

Claims

1. The utility model provides a special milling machine for machine tooling after tower machine gyration is welded which characterized in that: including supporting base (1), slide rail (2), unit head (3) and gyration fixing device (4), support base (1) upside welded fastening slide rail (2) be provided with slip table (201) on slide rail (2), the lower extreme of gyration fixing device (4) passes through slip table (201) and sets up on slide rail (2), slip table (201) upper end connects soon gyration fixing device (4), it is provided with unit head (3) to support base (1) upside to be located gyration fixing device (4) upper end welded fastening, unit head (3) lower extreme connects soon and is provided with milling cutter dish (301).

2. The special milling machine for the rotary post-welding machining of the tower crane according to claim 1 is characterized in that a rack (101) is arranged on one end side of the supporting base (1), the rack (101) is provided with a vertical supporting part and a horizontal supporting part, the lower end of the vertical supporting part of the rack (101) is arranged on one end side of the supporting base (1), the horizontal supporting part of the rack (101) excessively extends to the upper part of the sliding table (201) along the arc-shaped upper end of the vertical supporting part, a power head (3) is arranged on the horizontal supporting part of the rack (101), the upper end of the power head (3) is arranged on the horizontal supporting part of the rack (101), the lower end of the power head (3) is perpendicular to the upper surface of the supporting base (1), and the sliding rail (2) is arranged at the other end of the supporting base (1).

3. The special milling machine for the rotary post-weld machining of the tower crane according to claim 2, characterized in that the sliding table (201) is clamped on the upper side of the sliding rail (2), and the surface of the sliding table (201) is perpendicular to the power head (3) on the horizontal supporting part of the rack (101).

4. The special milling machine for the rotary post-welding machining of the tower crane according to claim 1, characterized in that a rotary support (401) is arranged on the sliding table (201), a plurality of rotary fixing devices (4) are arranged at intervals along the edge of the upper surface of the rotary support (401), and the lower surface of each rotary fixing device (4) is screwed and fixed on the edge of the upper surface of the rotary support (401).

5. The special milling machine for the post-slewing welding machining of the tower crane according to claim 4, wherein a slewing drive mechanism (403) is fixedly screwed at one end of the slewing bearing (401), and an output shaft of the slewing drive mechanism (403) is in transmission connection with the slewing bearing (401) through a drive gear (403 a).

6. The special milling machine for the rotary post-weld machining of the tower crane according to claim 5, characterized in that a support plate (202) is fixed outside the sliding table (201) below the rotary support (401), a support frame (404) is arranged on the lower surface of the end part of the support plate (202), the support frame (404) is welded and fixed on the lower surface of the support plate (202), and the rotary driving mechanism (403) is arranged at the upper end of the support frame (404).

7. A special milling machine for tower crane rotary postweld machining according to claim 4, characterized in that clamping components (402) fixed with workpieces (5) are respectively arranged on the rotary fixing devices (4).

8. A machining method of a special milling machine for machining after slewing of a tower crane according to any one of claims 1 to 7, characterized by comprising the following steps:

step 1, mounting various parts, firmly mounting a support base (1) on a foundation, fixedly connecting a sliding table (201) and a sliding rail (2) with the support base (1), mounting a rack (101) at one end of the support base (1) after a rotary fixing device (4) is mounted on a rotary support (401), and enabling a power head (3) on a horizontal support part of the rack (101) to be downwards vertical to the surface of the rotary support (401);

step 2, debugging each component, starting the rotary driving mechanism (403), rotating forwards and backwards for one circle, enabling the sliding table (201) to move back and forth on the sliding rail (2) once, starting the power head (3) to move up and down once, and driving the milling cutter disc (301) to rotate for 30 seconds;

step 3, adjusting a workpiece (5) to be installed and processed, clamping the workpiece (5) on a clamping assembly (402) of a rotary fixing device (4), starting a sliding table (201) to move to a corresponding position, enabling the sliding table to be 20-40mm away from the horizontal distance of a milling cutter disc (301), pausing to run, enabling the milling cutter disc (301) to extend downwards by a corresponding length, meeting the requirement of first-time feed milling amount, and starting the milling cutter disc (301) to rotate:

step 4, milling a workpiece (5), starting the sliding rail (2) and moving the sliding rail to the milling ring-penetrating surface of the workpiece (5), enabling the center of the milling cutter disc (301) to be located on the center line between the inner ring and the outer ring of the ring surface of the workpiece (5), locking the sliding table (5), starting the rotary driving mechanism (403) to drive the rotary support (401) to rotate, and driving the workpiece (5) on the rotary fixing device (4) to mill the ring surface in the rotating process;

step 5, after the milling of the ring surface of the workpiece (5) is finished, stopping the slewing bearing driving mechanism 8, stopping the milling cutter disc (301) from rotating, retracting the sliding rail (2) and returning to the original position; the clamping assembly (402) is released and the milled workpiece (5) is lifted out ready for the next work cycle.

9. The machining method according to claim 8, characterized in that in step 4, the slide (2) is fed at a speed of 1mm to 3mm/s during the start of the slide (2) and the movement to the milling through the annulus of the workpiece (5).

10. The machining method according to claim 8, characterized in that the milling cutter disc (301) rotates at a speed not lower than 300rpm and the driving slewing bearing (401) rotates at a speed lower than the milling cutter disc (301).