CN110587461B

CN110587461B - Three-leg magnetic type test piece clamping device of metallographic grinding and polishing machine

Info

Publication number: CN110587461B
Application number: CN201910854725.XA
Authority: CN
Inventors: 孟庆武; 于心泷; 李文秀; 李翠艳; 孙丽丽; 王霖
Original assignee: Northeast Petroleum University
Current assignee: Daqing Qingdong Hongyun Technology Co.,Ltd.
Priority date: 2019-09-10
Filing date: 2019-09-10
Publication date: 2021-02-05
Anticipated expiration: 2039-09-10
Also published as: CN110587461A

Abstract

A three-leg magnetic type test piece clamping device of a metallographic grinding and polishing machine. The main purpose is to provide a sample clamping device which is conveniently arranged on a metallographic grinding and polishing machine by means of magnetic force. The method is characterized in that: the device comprises a three-leg bracket, a fixture disc, a loading weight, a nut, a screw, a clamp spring, a pry bar, a pin shaft, a lifting column, a magnet, a sample jackscrew, a clamping sleeve jackscrew and the like; the square hole barrel of the three-leg bracket is used for mounting the fixture plate; the round hole cylinder is used for mounting a magnet; the bracket arm is used for connecting the square hole cylinder and the round hole cylinder; the fixture disc is used for installing a clamping sleeve and carrying out grinding and polishing; the prying bar is a long bar and is used for prying the magnet; the lifting column is a cylinder and is used for pulling the magnet through the prying bar; the lower end of the lifting column is provided with threads for connecting a magnet, the upper part of the lifting column is provided with an axial notch and a transverse hole, and the lifting column is connected with a pry bar through a pin shaft; the magnet is used for being fixed on the upper shell of the grinding and polishing machine in an adsorption manner; the sample jackscrew is used for fixing the sample in the cutting ferrule, and the cutting ferrule jackscrew is used for fixing the cutting ferrule in the fixture dish.

Description

Three-leg magnetic type test piece clamping device of metallographic grinding and polishing machine

Technical Field

The invention relates to a device which can be matched with a metallographic polisher.

Background

The metallographic grinding and polishing machine utilizes the motor to drive the grinding and polishing disc to rotate so as to grind a test piece, and has the advantages of simple structure, low manufacturing cost, long service life and the like. However, the common metallographic grinding and polishing machine has certain problems in the aspect of clamping the test piece: the grinding and polishing device needs to manually hold a test piece for a long time, only one test piece can be ground at a time, the labor intensity is high, the sample preparation efficiency is low, the test piece is easy to fly by the quickly rotating grinding and polishing disc, and potential safety hazards exist.

In recent years, sample holding devices for metallographic polishing machines have been developed in succession at home and abroad. However, these sample holding devices have several disadvantages, such as: some devices are difficult to install on the grinding and polishing machine, and need to be welded or connected by drilling bolts on the original grinding and polishing machine; some devices are fixed in the mounting position on the grinding and polishing machine, and the position can not be adjusted randomly according to the requirement; some devices can only clamp and fix standard cylindrical samples with fixed diameters, and nonstandard special-shaped samples such as thin-wall arc samples cut from pipe bodies have poor clamping and fixing effects.

Disclosure of Invention

In order to solve the technical problems mentioned in the background technology, the invention provides a three-leg magnetic type metallographic grinding and polishing machine test piece clamping device which is conveniently installed on a metallographic grinding and polishing machine by means of magnetic force, the installation position can be adjusted at will, and welding or drilling on the original grinding and polishing machine is not needed. And, the device is according to the supporting special cutting ferrule of sample shape, and special shape sample all can be fixed by the centre gripping well.

The technical scheme of the invention is as follows: the three-leg magnetic type test piece clamping device for the metallographic grinding and polishing machine comprises a three-leg bracket, a fixture disc, a loading weight, a nut, a screw, a clamp spring, a pry bar, a pin shaft, a lifting column, a magnet, a test piece jackscrew, a clamping sleeve jackscrew, a cylindrical test piece clamping sleeve, a plate-shaped test piece clamping sleeve and an arc-shaped test piece clamping sleeve;

the three-leg bracket is used as a main body of the device, is made of nonmagnetic austenitic stainless steel materials and is formed by welding 1 square hole cylinder, 3 bracket arms, 3 round hole cylinders and 3 pairs of support lugs; the square hole barrel is a cylinder for processing a square hole and is used for installing a fixture disc; the round hole cylinder is a cylinder with a round hole with a small convex edge and is used for mounting a magnet; the support arm is a long-strip cross beam and is used for connecting the square hole cylinder and the round hole cylinder, a small threaded hole is machined in the upper surface of the support arm, and a clamp spring is installed through a screw; the support lug is welded at the upper part of the support arm and is connected with a prying bar through a pin shaft;

the fixture disc is used for installing a cutting sleeve and grinding and polishing loading and is formed by welding a disc and a square shaft; a plurality of axial round holes are processed on the outer edge of the disc, and the round holes are provided with openings and used for mounting the cutting ferrule; the square shaft is inserted into the square hole barrel of the three-leg support, threads are machined on the upper portion of the square shaft, and a loading weight is fixed through a nut;

the loading weights are disc-shaped, are arranged at the upper part of the square shaft of the fixture disc and are used for applying grinding and polishing loads, and the number of the loading weights can be adjusted according to the required load;

the clamp spring is formed by bending and processing a long thin steel plate, is installed on a support arm of the three-leg support through a screw and is used for locking the head of the prying rod;

the prying rod is a long rod and is used for prying the magnet to separate the magnet from the grinding and polishing machine shell; a round hole and a strip hole are processed on the pry bar, the pry bar is installed on the support arm of the three-leg support through a pin shaft by the round hole, and the strip hole is connected with the lifting column through the pin shaft;

the lifting column is a cylinder and is made of nonmagnetic austenitic stainless steel materials and used for pulling the magnet through the prying bar; the lower end of the lifting column is provided with threads for connecting a magnet, the upper part of the lifting column is provided with an axial notch and a transverse hole, and the lifting column is connected with a pry bar through a pin shaft;

the magnet is a cylindrical strong magnet and is used for adsorbing and fixing the sample clamping device on the upper shell of the grinding and polishing machine; a threaded hole is processed at the upper end of the magnet and is in threaded connection with the lower end of the lifting column;

the sample jackscrew and the cutting sleeve jackscrew are standard socket head cap screws, the sample jackscrew is used for fixing a sample in the cutting sleeve, and the cutting sleeve jackscrew is used for fixing the cutting sleeve in the fixture disc.

The clamping sleeve is a cylinder with a boss and a threaded hole on the side surface and is used for mounting samples in different shapes.

The invention has the following beneficial effects: 1. the device is very convenient to mount and dismount, and welding or drilling bolt connection on a grinding and polishing machine is not needed; 2. the device is arranged on the grinding and polishing machine by magnetic force, and the installation position can be adjusted at will according to the requirement; 3. the device is matched with a special clamping sleeve according to the shape of the sample, and the sample with a special shape can be well clamped and fixed.

Description of the drawings:

FIG. 1 is a front view in section of a sample holding device;

FIG. 2 is a front view of the pry bar of the device;

FIG. 3 is a cut-away front view of a circlip of the device;

FIG. 4 is a cut-away front view of the magnet of the device;

FIG. 5 is a cut-away front view of the lifting column of the device;

FIG. 6 is a left side view of the lifting column of the apparatus;

FIG. 7 is a cut-away front view of a cylindrical sample ferrule of the device;

FIG. 8 is a top view of a cylindrical sample ferrule of the device;

FIG. 9 is a top view of a plate-like sample ferrule of the device;

FIG. 10 is a top view of an arcuate sample ferrule of the device;

FIG. 11 is a perspective view of a three-legged stand of the device;

FIG. 12 is a perspective view of a chuck plate of the apparatus;

FIG. 13 is a cut-away front view of a fixture disk mounting ferrule and a sample;

FIG. 14 is a cut-away top view of a fixture disk mounting ferrule and a sample;

FIG. 15 is a cut-away front view of the device mounted to a polishing machine;

FIG. 16 is a top view of the device mounted to a polishing machine;

figure 17 is a front view in section with the device separated from the polisher.

In the figure: 1. a three-legged support; 101. a square hole cylinder; 102. a support arm; 103. a cylindrical bore; 104. supporting a lug; 2. a fixture plate; 201. a disc; 202. a square shaft; 3. loading weights; 4. a nut; 5. a screw; 6. a clamp spring; 7. a pry bar; 8. a pin shaft; 9. a lifting column; 10. a magnet; 11. carrying out sample jackscrew; 12. cutting a ferrule jackscrew; 13. a cylindrical sample clamping sleeve; 14. plate-shaped sample cutting sleeves; 15. an arc-shaped sample clamping sleeve; 16. a cylindrical sample; 17. a plate-like sample; 18. an arc-shaped sample; 19. A polishing disc of the polishing machine; 20. a shell of the grinding and polishing machine.

The specific implementation mode is as follows:

the invention will be further described with reference to the accompanying drawings in which:

as shown in fig. 1 to 17, the technical solution adopted by the present invention to solve the technical problem is: the device is formed by a three-leg support, a fixture disc, a loading weight, a nut, a screw, a clamp spring, a pry bar, a pin shaft, a lifting column, a magnet, a sample jackscrew, a clamping sleeve jackscrew, a cylindrical sample clamping sleeve, a plate-shaped sample clamping sleeve and an arc-shaped sample clamping sleeve.

The three-leg support is used as a main body of the device, is arranged on the upper part of the metallographic grinding and polishing machine by means of magnetic force and is used for supporting the whole sample clamping device. The three-leg bracket is made of nonmagnetic austenitic stainless steel materials and is formed by welding 1 square hole cylinder, 3 bracket arms, 3 round hole cylinders and 3 pairs of support lugs. The square hole barrel is a cylinder for processing a square hole and is used for installing the fixture plate. The round hole cylinder is a cylinder with a small convex edge round hole and is used for mounting a magnet. The support arm is a long-strip cross beam and is used for connecting the square hole cylinder and the round hole cylinder, small threaded holes are machined in the upper surface of the support arm, and the clamp springs are installed through screws. The support lug is welded on the upper part of the support arm and is connected with a pry bar through a pin shaft.

The fixture disc is used for installing a clamping sleeve and grinding and polishing loading and is formed by welding a disc and a square shaft. A plurality of axial round holes are processed on the outer edge of the disc, and the round holes are provided with openings and used for installing clamping sleeves. The square shaft is inserted into the square hole barrel of the three-leg support, threads are machined on the upper portion of the square shaft, and the loading weight is fixed through a nut.

The loading weights are disc-shaped, are arranged on the upper part of the square shaft of the fixture disc and are used for applying grinding and polishing loads, and the number of the loading weights can be adjusted according to the size of the required loads.

The clamp spring is formed by bending and processing a strip-shaped thin steel plate, is installed on the support arm of the three-leg support through screws and is used for locking the head of the prying rod.

The prying rod is a long rod, and the lifting load is amplified by utilizing the lever principle and is used for prying the magnet to separate the magnet from the grinding and polishing machine shell. A round hole and a strip hole are processed on the pry bar, the pry bar is installed on the support arm of the three-leg support through a pin shaft by the round hole, and the strip hole is connected with the lifting column through the pin shaft.

The lifting column is a cylinder, is made of nonmagnetic austenitic stainless steel materials and is used for pulling the magnet through the prying bar. The lower end of the lifting column is provided with a thread for connecting a magnet, the upper part of the lifting column is provided with an axial opening and a transverse hole, and the lifting column is connected with a pry bar through a pin shaft.

The magnet is a cylindrical strong magnet and is used for adsorbing and fixing the sample clamping device on the upper shell of the polishing and burnishing machine. The upper end of the magnet is provided with a threaded hole which is connected with the lower end of the lifting column through threads,

The clamping sleeve is a cylinder with a boss and a threaded hole on the side surface and is used for mounting samples in different shapes. Divide into cylinder sample cutting ferrule, plate sample cutting ferrule, arc sample cutting ferrule according to the installation sample shape, cylinder sample cutting ferrule hole is circular, and plate sample cutting ferrule hole is the rectangle, and arc sample cutting ferrule hole is the shape of an arc face.

The method for installing and disassembling the sample clamping device on the metallographic grinding and polishing machine comprises the following steps:

when the three-leg bracket is installed, the clamp spring for locking the prying rod is pulled open, the head of the prying rod is loosened, the tail of the prying rod swings downwards, and the magnet falls to the bottom of the circular cylinder of the three-leg bracket; and selecting a proper position on the upper surface of the shell of the metallographic polishing machine, dropping the sample clamping device on the metallographic polishing machine, and adsorbing the magnet on the shell so as to fix the sample clamping device, as shown in fig. 15.

When the device is disassembled, the tail part of the pry bar is pulled upwards, the pry bar pulls the lifting column, the lifting column pulls the magnet to be separated from the grinding and polishing machine shell, meanwhile, the head part of the pry bar is clamped at the clamp spring to be locked, and then the sample clamping device is easily separated and taken away from the metallographic grinding and polishing machine, and the reference is made to fig. 17.

The use method of the sample clamping device on the metallographic grinding and polishing machine is as follows:

step one, according to the prefabricated shape characteristics of being equipped with the metallographic specimen, join in marriage dress different shape sample cutting ferrule, loosen the cutting ferrule jackscrew, just can follow the fixture dish and take out the change cutting ferrule.

And secondly, the size of the grinding and polishing load can be changed by adjusting the number of loading weights on the fixture disc, and the total weight of the loading weights, the fixture disc and the test piece is the positive pressure of the grinding and polishing surface.

And thirdly, arranging the cylindrical, plate-shaped or arc-shaped sample in a corresponding sample clamping sleeve, wherein the exposed parts at the lower end of the sample are the same in height and are fixed through a sample jackscrew.

And fourthly, starting the metallographic polishing machine to perform sample polishing preparation operation.

And fifthly, stopping the grinding and polishing machine after the test piece is well ground and polished, loosening the top thread of the test piece, and disassembling the test piece.

Claims

1. A three-leg magnetic type test piece clamping device of a metallographic grinding and polishing machine comprises a three-leg bracket, a fixture disc, a loading weight, a nut, a screw, a clamp spring, a pry bar, a pin shaft, a lifting column, a magnet, a sample jackscrew, a clamping sleeve jackscrew, a cylindrical sample clamping sleeve, a plate-shaped sample clamping sleeve and an arc-shaped sample clamping sleeve;

the sample jackscrew and the cutting sleeve jackscrew are standard components of an inner hexagon screw, the sample jackscrew is used for fixing a sample in the cutting sleeve, and the cutting sleeve jackscrew is used for fixing the cutting sleeve in the fixture disc;