CN107745332B

CN107745332B - Device for reducing or eliminating grinding vibration marks

Info

Publication number: CN107745332B
Application number: CN201711111238.1A
Authority: CN
Inventors: 徐嘉乐; 俞浩荣; 姚素芹
Original assignee: Changzhou Vocational Institute of Mechatronic Technology
Current assignee: Changzhou Vocational Institute of Mechatronic Technology
Priority date: 2017-11-13
Filing date: 2017-11-13
Publication date: 2024-02-02
Anticipated expiration: 2037-11-13
Also published as: CN107745332A

Abstract

The invention discloses a device for reducing or eliminating grinding vibration marks, and belongs to the technical field of machining. The device comprises a heavy hammer, round steel, a disc and a base; the disc is vertically arranged and fixed with the base along the shaft, so that the disc can rotate along the shaft; two screw holes with a distance of 100-130 degrees are arranged on the circumference of the disc along the radial direction; one end of the round steel is provided with threads, the threaded ends of the two round steels are respectively fixed in screw holes of the disc, and at least one heavy hammer capable of moving along the round steel is arranged on one round steel. The device provided by the invention reduces vibration generated when a workpiece is ground in a vibration damping mode, can well eliminate grinding vibration marks generated when the slender rod piece is ground on the grinding machine, improves the processing quality and efficiency of the workpiece, and saves cost.

Description

Device for reducing or eliminating grinding vibration marks

Technical Field

The invention relates to a device for reducing or eliminating grinding vibration marks, and belongs to the technical field of machining.

Background

The workpiece is trembled due to high-speed mechanical movement in the grinding process, uneven abrasion can occur on the surface of the grinding wheel, so that wave marks can be generated on the parts and the surface of the grinding wheel, and further improvement of grinding precision, surface quality and productivity is limited.

When the slender rod piece is ground on the grinding machine, the workpiece is low in rigidity, vibration is easy to generate in the process of grinding the rod piece, so that vibration marks are generated on the surface of the workpiece, and the quality of the workpiece is affected.

It has been found that machine tool vibration is a major cause of vibration marks on the surface of a workpiece. The vibration of the machine tool is prevented from needing to be checked to determine a vibration source, and a motor, a grinding head, a belt pulley, a grinding wheel, a hydraulic system and the like are checked. However, the inspection period is long, and the generation of vibration marks cannot be effectively avoided or reduced in actual operation. In addition, the conventional method for improving the grinding precision further comprises the following steps: (1) Selecting the rotation speed V of the workpiece from the position with the weakest axial rigidity _w Longitudinal feed speed V _f Constant speed grinding is performed while using as small a grinding depth as possible. Thus, parameter V _w 、V _f Corresponding to those points of greater stiffness the value of (c) will not likely become the optimal point,this entails a waste of grinding costs and time; (2) The method for improving the rigidity of the workpiece by adopting the center frame has low processing efficiency, complex adjustment, higher technical requirements on workers and limited effect of improving the processing precision; (3) The error compensation measures are adopted in two strategies, namely a process compensation strategy such as trimming and adjusting and a grouping strategy such as selecting, the grinding quantity of each processing point is calculated through a formula, and the actual grinding quantity of the workpiece is forced to reach a calculated value in the processing process so as to reduce the influence of elastic deformation. However, it is difficult to calculate the grinding amount and elastic deformation at a certain point in the grinding process.

Therefore, a device for grinding the vibration mark without damaging the workpiece is needed to realize flexible grinding of the vibration mark so as to improve the processing precision of the workpiece and further improve the processing quality.

Disclosure of Invention

A first object of the present invention is to provide a device for reducing or eliminating grinding chatter marks, comprising a weight, a round steel, a disc and a base; the disc is vertically arranged and fixed with the base along the shaft, so that the disc can rotate along the shaft; two screw holes with a distance of 100-130 degrees are arranged on the circumference of the disc along the radial direction; one end of the round steel is provided with threads matched with the screw holes, the threaded ends of the two round steels are respectively fixed in the screw holes of the disc, and at least one heavy hammer capable of axially moving along the round steel is arranged on one round steel.

In one embodiment of the invention, the disc is fixed with the base along the shaft by shoulder screws; the shoulder length of the shoulder screw is larger than the axial thickness of the disc, so that the disc can rotate along the shaft.

In one embodiment of the invention, the screw holes are 120 ° apart.

In one embodiment of the invention, the weight is fixed to the round steel by a thumb screw.

In one embodiment of the invention, the base is a cube.

The second object of the present invention is to provide a method for eliminating grinding marks, wherein the grinding mark eliminating device is used for abutting a workpiece to be treated against the end part of the round steel without the heavy hammer, so that vibration applied to the workpiece eliminates the grinding marks through damping force generated by the round steel and the heavy hammer.

The invention also provides equipment comprising the grinding vibration mark eliminating device.

The beneficial effects are that: the invention provides a device for reducing or eliminating grinding vibration marks, which is suitable for rod piece processing, and can reduce the vibration generated during grinding a workpiece in a vibration damping mode, reduce the grinding vibration by 60-70%, obviously reduce the grinding vibration marks of the workpiece, improve the processing quality and efficiency of the workpiece and save the cost.

Drawings

FIG. 1 is a schematic view of a grinding chatter mark eliminating device according to the present invention; wherein, 1, a heavy hammer; 2, butterfly screws; 3, round steel; 4, shoulder screws; 5, a base; 6, a disc; 7, a workpiece;

FIG. 2 is a schematic view showing a part of a disc fixing manner of a grinding vibration mark eliminating device according to the present invention; wherein, 4, the screw; and 6, a disc.

Detailed Description

As shown in fig. 1-2, a grinding vibration mark eliminating device of the present invention comprises a weight 1, a round steel 3, a disc 6 and a base 5; the base 5 is a cube; the disc 6 is vertically arranged, the disc 6 is fixed with the base 5 along the shaft through a shoulder screw 4 horizontally arranged, and the shoulder length of the shoulder screw 4 is larger than the axial thickness of the disc 6, so that the disc 6 can rotate along the shaft; two screw holes with angles of 100-130 degrees are arranged on the circumference of the disc 6 along the radial direction; one end of the round steel 3 is provided with threads, and the other end face is smooth; the two round steels 3 are respectively fixed in screw holes of the disc 6 through the end parts provided with threads. At least one heavy hammer 1 which can move along the axial direction of the round steel (namely the length direction of the round steel) is arranged on one round steel 3, and the heavy hammer 1 is fixed on the round steel 3 through a butterfly screw 2.

The working mode of the invention is as follows: the base 5 is fixed to the table surface, and shoulder screws are passed through the shaft of the disk 6 and vertically fix the disk 6 to the side wall of the base 5. Because the length of the shoulder is greater than the axial thickness of the disc, the disc can rotate along the shoulder screw. The weight 1 on the round steel 3 is adjusted to a proper position according to the length of the workpiece or the vibration intensity possibly generated by grinding, the weight 1 is fixed by the butterfly screw 2, and the smooth end part of the short round steel is propped against the workpiece 7. When the workpiece 7 is subjected to grinding processing, the grinding vibration is transmitted to the heavy hammer 1 through the round steel 3, and the vibration amplitude of the processed workpiece is reduced by damping the vibration. The device can reduce grinding vibration by 60-70%, and remarkably reduce grinding vibration marks of the workpiece.

While the invention has been described with reference to the preferred embodiments, it is not limited thereto, and various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The device for reducing or eliminating the grinding vibration mark is characterized by comprising a heavy hammer, round steel, a disc and a base; the disc is vertically arranged and fixed with the base along the shaft, so that the disc can rotate along the shaft; two screw holes with a distance of 100-130 degrees are arranged on the circumference of the disc along the radial direction; one end of the round steel is provided with threads, and the other end face is smooth; the threaded ends of the two round steels are respectively fixed in screw holes of the disc, and at least one heavy hammer capable of moving along the axial direction of the round steel is arranged on one round steel.

2. A device for reducing or eliminating grinding chatter marks as defined in claim 1, wherein said disk is vertically disposed and screwed along the shaft to the base.

3. A device for reducing or eliminating grinding chatter marks as defined in claim 2, wherein said screw is a shoulder screw having a shoulder length greater than an axial thickness of the disc so that the disc is rotatable along the shaft.

4. A device for reducing or eliminating grinding chatter marks as defined in claim 1, wherein the screw holes are spaced apart by 120 °.

5. A device for reducing or eliminating grinding chatter marks as defined in any one of claims 1-4, wherein the weight is fixed to the round steel by a thumb screw.

6. The apparatus of claim 5 wherein the base is a cube.

7. A method for reducing or eliminating grinding vibration marks, characterized in that the grinding vibration mark eliminating device according to any one of claims 1-4 and 6 is applied to the end of round steel without a heavy hammer to perform grinding processing on a workpiece to be processed.

8. A method for reducing or eliminating grinding vibration marks, characterized in that the grinding vibration mark eliminating device according to claim 5 is applied to the workpiece to be processed, the workpiece is abutted against the end part of the round steel without the heavy hammer, and the grinding processing is carried out on the workpiece.

9. An apparatus comprising the device for reducing or eliminating grinding chatter marks according to any one of claims 1 to 4, 6.