CN215546717U

CN215546717U - Center frame refitting tool for lathe

Info

Publication number: CN215546717U
Application number: CN202120839064.6U
Authority: CN
Inventors: 孙喜锋; 孙华; 汪巍巍; 黄强; 冯欢庆; 符民
Original assignee: Jiangnan Heavy Industry Co ltd
Current assignee: Jiangnan Heavy Industry Co ltd
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2022-01-18
Anticipated expiration: 2031-04-22

Abstract

The utility model relates to the technical field of machining process equipment, in particular to a center frame refitting tool for a lathe, which comprises an original bracket mechanism, wherein a refitting mechanism is fixedly arranged at the upper end of the original bracket mechanism; the improved mechanism comprises a bracket base, a connecting leg is fixedly arranged at the lower end of the bracket base, a mounting screw is connected to the upper end of the connecting leg in a threaded manner, a mounting hole is formed in the upper end of the original bracket mechanism in a penetrating manner, the mounting screw is matched with the mounting hole in a matched manner, the original bracket mechanism is fixedly connected with the connecting leg through the mounting screw, a limiting strip is fixedly arranged at the lower end of the connecting leg, and a central bearing is fixedly arranged at the inner end of the bracket base. The utility model can be directly installed on the original center bracket of the machine tool, and omits the step of using a transition sleeve tool, thereby achieving the purpose of turning after directly loading the machine tool on a center frame for supporting, reducing the adjusting time and improving the working efficiency.

Description

Center frame refitting tool for lathe

Technical Field

The utility model relates to the technical field of machining process equipment, in particular to a center frame refitting tool for a lathe.

Background

The machining is a process of changing the outer dimensions or properties of a workpiece by a mechanical device, and is classified into cutting and pressing according to the difference in machining modes.

For a large slender shaft with a forged blank, such as a stern shaft of a marine adjustable propeller, the length of the slender shaft is 8-15 meters, the diameter of the slender shaft is about 0.3-0.5 meter, the weight of the slender shaft is 4-10 tons, a center frame is required to be supported during turning, but because the diameter of the shaft is small and the length is long, the surface of the part can not be directly supported by the central frame during turning, for the problems, the conventional solution is to install a transition sleeve tool for a lathe on the excircle of a shaft, then the central bracket is supported on the excircle of the transition sleeve tool, the subsequent turning of the shaft can be carried out after the central bracket is firmly supported, because the shaft has small diameter, long length and heavy weight, and particularly for some slender shafts with high processing precision requirements, the shaft has great difficulty in processing according to the method, for example, when the transition sleeve is installed on the shaft body, the concentricity of the transition sleeve and the shaft needs to be ensured, the accuracy requirements such as circular runout of the transition sleeve and the shaft need to be consistent, and therefore repeated correction and adjustment are needed when the transition sleeve is installed; and secondly, the transition sleeve needs to be repeatedly disassembled and moved in the machining process, the machining method is complex in steps in the shaft turning process, the product needs to be installed and adjusted for many times, the machining period and the machining cost of the product are influenced, and the machining precision requirement cannot be completely guaranteed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a center frame refitting tool for a lathe, which aims to solve the problems that in the prior art, due to the fact that the diameter of a shaft is small, the length is long, the weight is heavy, and particularly for some slender shafts with high machining precision requirements, the shaft is difficult to machine according to the method, for example, when a transition sleeve is arranged on a shaft body, the transition sleeve and the shaft are concentric, the precision requirements such as circular runout of the transition sleeve and the shaft are required to be consistent, and therefore repeated adjustment is needed when the transition sleeve is arranged; and secondly, the transition sleeve needs to be repeatedly disassembled and moved in the machining process, the machining method has complex steps in the shaft turning process, and the product needs to be installed and adjusted for many times, so that the machining period and the machining cost of the product are influenced, and the machining precision requirement cannot be completely guaranteed.

In order to achieve the purpose, the utility model provides the following technical scheme: a center frame refitting tool for a lathe comprises an original bracket mechanism, wherein a refitting mechanism is fixedly installed at the upper end of the original bracket mechanism;

the mechanism of repacking includes the bracket base, the fixed connecting leg that is provided with of lower extreme of bracket base, the upper end threaded connection of connecting leg has the mounting screw, the upper end of former bracket mechanism runs through and is provided with the mounting hole, mounting screw and mounting hole looks adaptation, through mounting screw and mounting hole fixed connection between former bracket mechanism and the connecting leg, the fixed spacing that is provided with of lower extreme of connecting leg, the inner fixed mounting of bracket base has center bearing, the front end of bracket base runs through and is provided with the axle pinhole, axle pinhole and center bearing are concentric structure, the inside fixed mounting of axle pinhole has fixing pin, fixing pin's front end passes center bearing and axle pinhole and extends to the front end in axle pinhole.

Preferably, fixed mounting has the retaining ring between center bearing and the bracket base, the upper end threaded connection of bracket base has fastening screw, fastening screw's lower extreme passes the bracket base and extends to the upper end of fixed pivot axle, through installation fastening screw to use fastening screw to fix fixed pivot axle and axle pin hole, improve the steadiness of fixed pivot axle.

Preferably, former bracket mechanism includes the milling flutes, the milling flutes is located the upper end of former bracket mechanism, milling flutes and spacing adaptation, through the milling flutes and the spacing that set up the looks adaptation, axial stability between the former bracket mechanism of improvement and the mechanism of repacking can be effectual.

Preferably, the diameter of the fixing shaft pin is larger than that of the inner end of the central bearing, the fixing shaft pin is connected with the central bearing in an interference fit mode, the fixing shaft pin is connected with the central bearing in the interference fit mode, and elastic pressure is generated between the fixing shaft pin and the inner end of the central bearing after assembly by means of the interference value of the fixing shaft pin and the inner end of the central bearing, so that the connection tightness of the fixing shaft pin and the central bearing is improved.

Preferably, the diameter of the fixing shaft pin is larger than the inner diameter of the shaft pin hole, the fixing shaft pin is connected with the shaft pin hole in an interference fit mode, and elastic pressure is generated between the surface of the fixing shaft pin and the surface of the shaft pin hole after assembly by means of the interference value between the fixing shaft pin and the inner end of the shaft pin hole, so that the connection tightness between the fixing shaft pin and the shaft pin hole is further improved.

Preferably, the upper end of center bearing extends to the top of bracket base, bracket base and connection leg be integrated into one piece, and through setting up bracket base and connection leg be integrated into one piece, can further improve the structural stability of modified mechanism.

The working principle is as follows: when the lathe spindle is used, the refitting mechanism is firstly installed on an original bracket mechanism by using an installation screw, the limiting strips correspond to milling grooves, then a fixed shaft pin, a central bearing, a check ring, a fastening screw and the like are installed in place, then the shaft is placed on a lathe, one end of the shaft is clamped by a lathe chuck, the shaft body is placed on a central frame of the refitting mechanism, the other end of the shaft is tightly propped by a lathe thimble, then the conventional method for adjusting the central bracket is adopted, the fulcrum of the refitting mechanism is adjusted to be in contact with the excircle of the shaft, then the adjustment is carried out, and after the adjustment is finished, the subsequent turning processing can be carried out.

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

1. the center frame refitting tool for the lathe can be directly installed on an original center bracket of the lathe, the step of using a transition sleeve tool is omitted, the purpose of turning after directly mounting the center frame on the lathe and supporting the center frame is achieved, the adjusting time is shortened, and the working efficiency is improved;

2. the lathe refits the tool by the center frame, the repeated adjustment is not needed during the installation, and the repeated disassembly or movement of the transition sleeve is also not needed during the processing, so that the processing method has the advantages that the steps are simple during the shaft turning process, the product is not needed to be repeatedly installed and adjusted, the processing period and the processing cost of the product are reduced, and the processing precision requirement can be ensured;

3. this lathe is with centre frame repacking frock adopts interference fit, relies on the interference value in axle and hole, makes the part surface produce elastic pressure after the assembly between, and the external fastening screw of cooperation can improve the structural stability of this lathe is with centre frame repacking frock greatly.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic cross-sectional view of the reforming mechanism of the present invention;

FIG. 3 is a schematic view of a disassembled structure of the central bearing of the present invention;

FIG. 4 is a schematic perspective view of the pin hole of the present invention.

In the figure: 1. an original bracket mechanism; 2. a retrofit mechanism; 3. a bracket base; 4. a connecting leg; 5. mounting screws; 6. mounting holes; 7. a limiting strip; 8. a center bearing; 9. a shaft pin hole; 10. fixing the shaft pin; 11. a retainer ring; 12. fastening screws; 13. and (5) milling a groove.

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.

Example 1

The preferred embodiment of the center frame refitting tool for the lathe provided by the utility model is shown in fig. 1 to 4: a center frame refitting tool for a lathe comprises an original bracket mechanism 1, wherein a refitting mechanism 2 is fixedly arranged at the upper end of the original bracket mechanism 1;

the refitting mechanism 2 comprises a bracket base 3, a connecting leg 4 is fixedly arranged at the lower end of the bracket base 3, a mounting screw 5 is connected with the upper end of the connecting leg 4 through threads, a mounting hole 6 is arranged at the upper end of an original bracket mechanism 1 in a penetrating manner, the mounting screw 5 is matched with the mounting hole 6, the original bracket mechanism 1 is fixedly connected with the connecting leg 4 through the mounting screw 5, a limiting strip 7 is fixedly arranged at the lower end of the connecting leg 4, a central bearing 8 is fixedly arranged at the inner end of the bracket base 3, a shaft pin hole 9 is arranged at the front end of the bracket base 3 in a penetrating manner, the shaft pin hole 9 and the central bearing 8 are of a concentric structure, a fixed shaft pin 10 is fixedly arranged inside the shaft pin hole 9, the front end of the fixed shaft pin 10 penetrates through the central bearing 8 and the shaft pin hole 9 and extends to the front end of the shaft pin hole 9, the refitting mechanism 2 is added on the basis of the original bracket mechanism 1, and the step of using a transition tool is omitted, the purpose of turning after directly going up lathe and holding with the centre frame is reached, reduce the regulation time, improve work efficiency.

Fixed mounting has retaining ring 11 between center bearing 8 and the bracket base 3, the upper end threaded connection of bracket base 3 has fastening screw 12, fastening screw 12's lower extreme passes bracket base 3 and extends to the upper end of fixed pivot axle 10, through installation fastening screw 12, and use fastening screw 12 to fix fixed pivot axle 10 and axle pinhole 9, improve the steadiness of fixed pivot axle 10, through installation fastening screw 12, can improve the structural stability of this for the lathe centre frame repacking frock greatly.

Example 2

On the basis of embodiment 1, a preferred embodiment of the center frame refitting tool for a lathe provided by the utility model is shown in fig. 1 to 4: former bracket mechanism 1 includes milling flutes 13, and milling flutes 13 is located the upper end of former bracket mechanism 1, and milling flutes 13 and spacing 7 looks adaptation through the milling flutes 13 and the spacing 7 that set up the looks adaptation, can effectual improvement former bracket mechanism 1 with change the axial stability between the mechanism 2.

Furthermore, the diameter of the fixing shaft pin 10 is larger than the diameter of the inner end of the central bearing 8, the fixing shaft pin 10 is connected with the central bearing 8 in an interference fit mode, the fixing shaft pin 10 is connected with the central bearing 8 in the interference fit mode, and elastic pressure is generated between the fixing shaft pin 10 and the inner end of the central bearing 8 after assembly by means of the interference value of the fixing shaft pin 10 and the inner end of the central bearing 8, so that the connection tightness of the fixing shaft pin 10 and the central bearing 8 is improved.

Furthermore, the diameter of the fixing shaft pin 10 is larger than the inner diameter of the shaft pin hole 9, the fixing shaft pin 10 is connected with the shaft pin hole 9 in an interference fit mode, and elastic pressure is generated between the surfaces of the fixing shaft pin 10 and the shaft pin hole 9 after assembly by means of the interference value of the fixing shaft pin 10 and the inner end of the shaft pin hole 9, so that the connection tightness of the fixing shaft pin 10 and the shaft pin hole 9 is further improved.

In addition, the upper end of the central bearing 8 extends to the upper side of the bracket base 3, the bracket base 3 and the connecting legs 4 are of an integrated structure, and the structural stability of the modification mechanism 2 can be further improved by arranging the bracket base 3 and the connecting legs 4 of the integrated structure.

When the utility model is operated and used, as shown in figures 1 to 4, when in use, the refitting mechanism 2 is firstly installed on the original bracket mechanism 1 by the installation screw 5, the limit strip 7 corresponds to the milling groove 13, then the fixed shaft pin 10, the central bearing 8, the check ring 11, the fastening screw 12 and the like are installed in place, then the shaft is placed on a lathe, one end of the shaft is clamped by a lathe chuck, the shaft body is placed on the central frame of the refitting mechanism 2, the other end of the shaft is tightly jacked by a lathe thimble, then the conventional method for adjusting the central bracket is adopted, the fulcrum of the refitting mechanism 2 is adjusted to contact with the excircle of the shaft, then the adjustment is carried out, and after the adjustment is finished, the subsequent turning processing can be carried out.

Finally, it should be noted that the above-mentioned contents are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, and that the simple modifications or equivalent substitutions of the technical solutions of the present invention by those of ordinary skill in the art can be made without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. The utility model provides a lathe is with centre frame repacking frock, includes former bracket mechanism (1), its characterized in that: the upper end of the original bracket mechanism (1) is fixedly provided with a modifying mechanism (2);

the improved mechanism (2) comprises a bracket base (3), a connecting leg (4) is fixedly arranged at the lower end of the bracket base (3), a mounting screw (5) is connected to the upper end of the connecting leg (4) in a threaded manner, a mounting hole (6) is arranged at the upper end of the original bracket mechanism (1) in a penetrating manner, the mounting screw (5) is matched with the mounting hole (6), the original bracket mechanism (1) is fixedly connected with the connecting leg (4) through the mounting screw (5) and the mounting hole (6), a limiting strip (7) is fixedly arranged at the lower end of the connecting leg (4), a central bearing (8) is fixedly arranged at the inner end of the bracket base (3), a shaft pin hole (9) is arranged at the front end of the bracket base (3) in a penetrating manner, the shaft pin hole (9) and the central bearing (8) are of a concentric structure, a fixed shaft pin (10) is fixedly arranged in the shaft pin hole (9), the front end of the fixing shaft pin (10) penetrates through the central bearing (8) and the shaft pin hole (9) and extends to the front end of the shaft pin hole (9).

2. The lathe center frame refitting tool as claimed in claim 1, wherein: a retainer ring (11) is fixedly mounted between the central bearing (8) and the bracket base (3), a fastening screw (12) is connected to the upper end of the bracket base (3) in a threaded manner, and the lower end of the fastening screw (12) penetrates through the bracket base (3) and extends to the upper end of the fixed shaft pin (10).

3. The lathe center frame refitting tool as claimed in claim 1, wherein: former bracket mechanism (1) is including milling flutes (13), milling flutes (13) are located the upper end of former bracket mechanism (1), milling flutes (13) and spacing (7) looks adaptation.

4. The lathe center frame refitting tool as claimed in claim 1, wherein: the diameter of the fixed shaft pin (10) is larger than that of the inner end of the central bearing (8), and the fixed shaft pin (10) is connected with the central bearing (8) in an interference fit manner.

5. The lathe center frame refitting tool as claimed in claim 1, wherein: the diameter of the fixing shaft pin (10) is larger than the inner diameter of the shaft pin hole (9), and the fixing shaft pin (10) is connected with the shaft pin hole (9) in an interference fit mode.

6. The lathe center frame refitting tool as claimed in claim 1, wherein: the upper end of the central bearing (8) extends to the upper part of the bracket base (3), and the bracket base (3) and the connecting legs (4) are of an integrated structure.