CN111185847A

CN111185847A - Semi-automatic metallographic grinder

Info

Publication number: CN111185847A
Application number: CN202010119514.4A
Authority: CN
Inventors: 黄元春; 文金川; 聂昌昌; 闵旭东
Original assignee: Central South University
Current assignee: Central South University
Priority date: 2020-02-26
Filing date: 2020-02-26
Publication date: 2020-05-22

Abstract

The embodiment of the application discloses semi-automatic metallographic grinder for the convenient observation of the thing grinding surface of treating to grind is realized. The semi-automatic metallographic grinder comprises a base with a polishing disc, a chuck used for clamping an object to be ground and a vertical lifting mechanism driving the chuck to move up and down, wherein the vertical lifting mechanism is connected with the chuck through a radial rotating rod; a locking piece for locking the radial rotating rod at a grinding position is arranged between the vertical lifting mechanism and the radial rotating rod; the locking piece comprises a positioning hole arranged on the radial rotating rod and a positioning pin which is arranged on the vertical lifting mechanism and can be inserted into or withdrawn from the positioning hole; when the radial rotating rod is located at the grinding position, the chuck is aligned with the polishing disc.

Description

Semi-automatic metallographic grinder

Technical Field

The invention relates to grinding equipment, in particular to a semi-automatic metallographic grinding device.

Background

At present, metallographic tests in colleges and universities generally adopt manual sample grinding, namely, a sample is placed on the surface of water-grinding abrasive paper for repeated grinding, and the roughness of the abrasive paper is gradually increased from coarse level to fine level. And polishing after the surface roughness of the sample meets the requirement, and finally obtaining the sample meeting the metallographic observation requirement. The main contradictions of manual sample grinding at present are that the force applied on a sample is difficult to control in the grinding process, and the flatness of a polished and ground surface is difficult to ensure due to uneven stress on the surface of the sample; on the other hand, the manual sample grinding force application mainly depends on pressing the sample by a thumb or a forefinger, and the fingernails or the fingers are easily abraded by abrasive paper in the grinding process, so that the safety coefficient is low.

Aiming at the defects of the traditional manual sample grinding, related personnel provide a series of metallographic grinding devices, and the problems that the equipment price is high, a special turntable grinding tool is needed and the replacement cost is high for a fully-automatic grinding device imported from abroad are solved; for some semi-automatic grinding devices, the cost is greatly reduced, but in the existing semi-automatic grinding device, in order to check the grinding quality, only the clamping head is loosened to take down the object to be ground, and the observation of the grinding surface of the object to be ground can be realized.

In conclusion, the conventional semi-automatic polishing apparatus cannot observe the polished surface of the object to be polished well.

Disclosure of Invention

The embodiment of the application provides a semi-automatic metallographic grinder for the realization treats convenient observation on grinding surface of lapping article.

Therefore, the embodiment of the application provides a semi-automatic metallographic grinding device which comprises a base with a polishing disc, a chuck for clamping an object to be ground and a vertical lifting mechanism for driving the chuck to move up and down;

the vertical lifting mechanism is connected with the chuck through a radial rotating rod, and the radial rotating rod is rotatably connected with the vertical lifting mechanism through a horizontally transverse rotating shaft;

a locking piece for locking the radial rotating rod at a grinding position is arranged between the vertical lifting mechanism and the radial rotating rod;

the locking piece comprises a positioning hole arranged on the radial rotating rod and a positioning pin which is arranged on the vertical lifting mechanism and can be inserted into or withdrawn from the positioning hole;

when the radial rotating rod is located at the grinding position, the chuck is aligned with the polishing disc.

In some embodiments, the mounting seat of the chuck is rotatably mounted at the bottom of the radial rotating rod through a rotary support;

a locking mechanism for limiting the unidirectional rotation of the mounting seat is arranged between the mounting seat and the radial rotating rod, and the rotation direction of the mounting seat is opposite to that of the throwing disk;

the locking mechanism comprises spring positioning pins which are arranged on the mounting seat in a crossed manner and limiting holes which are arranged on the radial rotating rods and are matched with the spring positioning pins;

the top of the spring positioning pin is provided with a locking inclined plane, and the bottom end face of the limiting hole is a matching inclined plane matched with the locking inclined plane.

In some embodiments, a buffer device is connected between the radial rotating rod and the mounting seat, and the buffer device comprises a buffer seat and a first compression spring;

the top of buffer seat matches the slip and inserts in the guiding hole of radial dwang bottom, first compression spring sets up be used for connecting in the guiding hole the buffer seat with radial dwang.

In some embodiments, the side portion of the radial rotating rod is further provided with a strip-shaped hole which is parallel to and communicated with the guide hole;

and the side part of the buffer seat is provided with a positioning screw which is inserted into the strip-shaped hole in a matching manner.

In some embodiments, a pressure sensor is disposed between the collet and the mount.

In some embodiments, the device further comprises a translation mechanism arranged on the base and driving the vertical lifting mechanism to move horizontally.

In some embodiments, the lifting mechanism comprises a housing, a coarse tuning cylinder and a shaft body, wherein the housing, the coarse tuning cylinder and the shaft body are arranged on the base and connected with the translation mechanism;

the shaft body is installed in the shell in a mode that the shaft body can rotate in the circumferential direction but cannot move in the axial direction, and the bottom end of the shaft body penetrates out of the shell to be in threaded fit connection with the coarse adjusting cylinder;

the top end of the coarse adjustment cylinder is rotatably and slidably connected outside the bottom of the shell, and the bottom end of the coarse adjustment cylinder is connected with the chuck;

a locking mechanism for locking the circumferential rotation of the coarse adjusting cylinder is arranged between the shell and the coarse adjusting cylinder;

the locking mechanism comprises a plurality of locking sliding grooves which are circumferentially and uniformly distributed on the outer wall of the shell and a circumferential limiting pin which is arranged on the coarse adjusting cylinder and can be inserted into or withdrawn from the locking sliding grooves; the extending direction of the locking sliding groove is parallel to the axial direction of the shaft body;

a hand wheel in transmission connection with the shaft body through a worm gear and a worm is arranged on the shell; wherein, the turbine of the turbine worm is arranged on the shaft body.

In some embodiments, the circumferential limiting pin is installed in a pin installation hole on the coarse adjustment barrel, and the tail end of the circumferential limiting pin extends out of the coarse adjustment barrel and is connected with a rotating pin cap;

the circumference limiting pin is sleeved with a return spring, and two ends of the return spring are respectively abutted against steps on the circumference limiting pin and steps in the pin mounting hole.

In some embodiments, the side wall of the pin mounting hole is provided with a guide groove extending axially, the side part of the circumferential limiting pin is provided with a protrusion which is inserted into the guide groove and can slide out of the guide groove to the outside of the coarse adjustment cylinder in the process that the circumferential limiting pin exits from the locking sliding groove.

In some embodiments, the locating pin is fitted in a pin hole in the bottom end face of the coarse adjustment barrel by a second compression spring;

a groove body communicated with the pin hole is arranged at the side part of the coarse adjustment cylinder;

a handle penetrating out of the groove body is arranged on the side part of the positioning pin;

the extending direction of the groove body is parallel to the axis of the pin hole.

In some embodiments, a clamping groove for accommodating the handle is formed in a side wall of one end, away from the radial rotating rod, of the groove body.

In some embodiments, the translation mechanism is a lead screw translation mechanism disposed on a column crossbar of the base.

In some embodiments, the drive screw of the screw translation mechanism intersects the central axis of the projectile.

In some embodiments, the chuck comprises a chuck body, a jaw adjusting cylinder and an elastic jaw arranged at the lower end of the chuck body, wherein the lower part of the chuck body is processed with external threads which are matched with the internal threads of the jaw adjusting cylinder, and a torsion spring is arranged between the jaw and the chuck body.

Compared with the prior art, the embodiment of the application has the advantages that:

when the grinding quality to be ground is observed, the positioning pin is only required to be withdrawn from the positioning hole for unlocking, the clamping head is driven by rotating the radial rotating rod, the object to be ground rotates by a certain angle, the grinding quality of the grinding surface of the object to be ground can be observed, and the operation is convenient.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be 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 to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is an isometric view of a semi-automatic metallographic grinding apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a vertical lift mechanism in an embodiment of the present invention;

FIG. 3 is a sectional view taken along line A-A of FIG. 2;

FIG. 4 is an enlarged schematic view at A in FIG. 2;

fig. 5 is a sectional view taken along line B-B in fig. 4.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, 2 and 4, the semi-automatic metallographic grinding device provided by the embodiment of the application comprises a base 2 with a polishing disc 1, a chuck 3 for clamping an object to be ground, and a vertical lifting mechanism 4 for driving the chuck 3 to move up and down to be close to or far away from the polishing disc 1. The object to be ground can be metal, ceramic or other objects needing to be ground.

Specifically, the throwing disc 1 is arranged on the top end face of the base 2, a motor for driving the throwing disc 1 to rotate is arranged in the base 2, a power switch 5 for controlling the motor to start and stop can be further arranged on the base 2, and a cooling water pipe 6 for grinding and cooling can be further arranged on the base.

Wherein, vertical elevating system 4 is connected with chuck 3 through radial dwang 7, and radial dwang 7 rotates with vertical elevating system 4 through horizontal pivot to be connected to make radial dwang 7 can revolute the relative vertical elevating system 4 internal rotation of pivot in vertical face, also can be in vertical face internal rotation chuck 3. Be equipped with between vertical elevating system 4 and the radial dwang 7 and lock 8 at the locking of grinding position of radial dwang 7, lock 8 is including setting up locating hole 801 on radial dwang 7 and setting up locating pin 802 that can insert or withdraw from locating hole 801 on vertical elevating system 4. Wherein the collet 3 is aligned with the throwing disk 1 when the radially swivelling levers 7 are in the grinding position.

In this embodiment, when an object to be ground needs to be ground, only the chuck 3 needs to be clamped to the object to be ground, the positioning pin 802 is inserted into the positioning hole 801, the radial rotating rod 7 is locked at the grinding position, the vertical lifting mechanism 4 drives the radial rotating rod 7, together with the chuck 3 and the object to be ground, to move downward until the radial rotating rod contacts the polishing disk 1 properly, and the grinding surface of the object to be ground can be ground through the grinding medium on the polishing disk 1.

When the grinding quality needs to be observed, the positioning pin 802 only needs to be withdrawn from the positioning hole 801, the chuck 3 is driven by rotating the radial rotating rod 7, and the object to be ground rotates by a certain angle, so that the grinding quality of the grinding surface of the object to be ground can be observed, and the operation is convenient.

Referring to fig. 2 and 3, in some embodiments, the lifting mechanism 4 of the semi-automatic metallographic grinding apparatus provided in this embodiment includes a housing 401 disposed on the pillar 9 of the base 2, a rough adjusting cylinder 402, and a shaft body 403. The shaft body 403 is mounted in the housing 401 in a manner that it can rotate circumferentially but not move axially, and the bottom end of the shaft body passes out of the housing 401 to be connected with the coarse adjustment cylinder 402 in a screw-fit manner, the top end of the coarse adjustment cylinder 402 is rotatably and slidably connected outside the bottom of the housing 401, and the bottom end of the coarse adjustment cylinder is connected with the chuck 3. A lock mechanism for locking the coarse adjustment cylinder 402 in rotation in the circumferential direction is provided between the housing 401 and the coarse adjustment cylinder 402.

Specifically, the locking mechanism comprises a plurality of locking sliding grooves 404 circumferentially and uniformly distributed on the outer wall of the shell 401 and a circumferential limiting pin 405 which is arranged on the coarse adjusting cylinder 402 and can be inserted into or withdrawn from the locking sliding grooves 404; the extending direction of the locking sliding chute 404 is parallel to the axial direction of the shaft body 403, a handwheel 407 in transmission connection with the shaft body 403 through a worm gear 406 is arranged on the housing 401, and a worm gear of the worm gear 406 is arranged on the shaft body 403.

In the embodiment, the lifting mechanism has two-stage coarse and fine adjusting functions; during rough adjustment, the circumferential limiting pin 405 is withdrawn from the locking chute 404, then the rough adjusting cylinder 402 is rotated, the shaft body 403 is still by utilizing the self-locking characteristic of the worm gear, the rough adjusting cylinder 402 drives the chuck 3 to spirally and axially move on the shaft body 403, and rough adjustment of the vertical distance of the chuck 3 relative to the polishing disc 1 is realized; during fine adjustment, the circumferential limiting pin 405 is inserted into the locking sliding groove 404, then the hand wheel 407 is rotated to drive the worm wheel to rotate, the worm wheel drives the shaft body 403 to rotate, the shaft body 403 pushes the coarse adjusting cylinder 402 to move, the corresponding circumferential limiting pin 405 slides in the locking sliding groove 404, and fine adjustment of the vertical distance of the chuck 3 relative to the throwing disc 1 is achieved by means of the speed reduction characteristic of the worm and gear.

In this embodiment, the lifting mechanism of the semi-automatic metallographic grinding device has two-stage adjusting functions of coarse adjustment and fine adjustment, the vertical distance of the chuck 3 relative to the polishing disc 1 can be quickly adjusted through the coarse adjustment, and the vertical distance of the chuck 3 relative to the polishing disc 1 can be slowly adjusted through the fine adjustment when an object to be ground approaches the polishing disc 1.

In some embodiments, the circumferential limit pin 405 is installed in a pin installation hole on the coarse adjustment barrel 402, the tail end of the circumferential limit pin extends out of the coarse adjustment barrel 402 and is connected with the rotating pin cap 408, a return spring 409 is sleeved on the circumferential limit pin 405, and two ends of the return spring 409 are respectively abutted against a step on the circumferential limit pin 405 and a step in the pin installation hole. The lateral wall of the pin mounting hole is provided with an axially extending guide groove (not shown in the figure), the lateral part of the circumferential limiting pin 405 is provided with a protrusion 4010 which is inserted into the guide groove and can slide out of the guide groove to the outside of the coarse adjusting cylinder 402 in the process that the circumferential limiting pin 405 exits the locking sliding groove 404.

In the coarse adjustment process, the circumferential limiting pin 405 is pulled out firstly, the protrusion 4010 is installed on the circumferential limiting pin 405, in the process that the circumferential limiting pin 405 is pulled out, the protrusion 4010 also moves out of the coarse adjustment cylinder 402 from the guide groove, at the moment, the rotating pin cap 408 drives the protrusion 4010 to rotate together to deviate from the position of the guide groove, the protrusion 4010 is tightly attached to the outer wall of the coarse adjustment cylinder 402 under the action of the compression spring after the hand is released, and at the moment, the circumferential limiting pin 405 completely withdraws from the locking sliding groove 404.

Referring to fig. 1 and 2, the upper part of the housing 401 is a box structure, the lower part is a circular cylinder, the locking chute 404 is arranged on the outer wall of the circular cylinder, the box cover of the upper box can be opened, the lower part of the box is processed with a bearing 4011 hole, the bearing 4011 hole is installed on the bearing 4011, the shaft 403 is installed in the inner hole of the bearing 4011, a shaft shoulder is arranged on the shaft 403 above the bearing 4011, a worm wheel is fixedly sleeved on the shaft 403, a worm matched with the worm wheel is installed on the box, a hand wheel 407 is installed on the shaft of the worm, the shaft 403 can be pressed tightly after the box cover is closed, and a nut in threaded fit with an external thread section on the shaft 403 is fixedly arranged in the coarse; in the fine adjustment process, firstly, the circumferential limit pin 405 is inserted, the rotating pin cap 408 drives the protrusion 4010 to rotate together to align the guide groove, the circumferential limit pin 405 is inserted into the locking sliding groove 404 of the shell 401 under the action of the compression spring after being released, then the hand wheel 407 is rotated to drive the worm wheel to rotate, the worm wheel drives the shaft body 403 to rotate, the nut is pushed to move, and the fine adjustment of the vertical distance of the chuck 3 relative to the throwing disc 1 is realized by utilizing the speed reduction characteristic of the worm wheel and the worm.

Referring to fig. 4 and 5, in some embodiments, the mounting seat 10 of the chuck 3 of the semi-automatic metallographic grinding device according to the embodiment of the present application is rotatably mounted at the bottom of the radial rotating rod 7 through the rotary support 11, a locking mechanism 12 for limiting the unidirectional rotation of the mounting seat 10 is disposed between the mounting seat 10 and the radial rotating rod 7, and the mounting seat 10 can only rotate in a unidirectional direction opposite to the rotation direction of the polishing disk 1 relative to the radial rotating rod 7 through the limitation of the locking mechanism 12.

Specifically, the locking mechanism 12 includes a spring positioning pin 1201 installed on the mounting seat 10 and a limiting hole 1202 arranged on the radial rotating rod 7 and adapted to the spring positioning pin 1201, the spring positioning pin 1201 is provided with a locking inclined surface 1203 at the top thereof, and the bottom end surface of the limiting hole 1202 is a matching inclined surface adapted to the locking inclined surface 1203. When the chuck 3 is rotated along the inclined plane direction of the spring positioning pin 1201, the spring positioning pin 1201 moves down along the matching inclined plane of the limiting hole 1202 under the action of the inclined plane, and when the chuck is rotated to 90 degrees, the spring positioning pin 1201 enters the next limiting hole 1202 under the action of the elastic element 1204.

In this embodiment, can change behind the different model abrasive paper and continue the grinding with chuck 3 round spring positioning pin 1201 inclined plane direction rotation 90, also can realize treating that the thing of lapping 90 cross lapping to can eliminate the mar that the grinding left last time, improve grinding quality, buffer 13 also can reduce the stress fluctuation of sample ground surface in the fine setting process. Because the mounting seat 10 can only rotate in one direction relative to the radial rotating rod 7 and in the direction opposite to the direction from the polishing disk 1, the chuck 3 and the mounting seat 10 cannot rotate in the grinding process.

It should be explained that, in some possible embodiments, a buffer device 13 may be further connected between the radial rotating rod 7 and the mounting seat 10, the buffer device 13 includes a buffer seat 1301 and a first compression spring 1302, a top end of the buffer seat 1301 is matched and slidably inserted into a guide hole at a bottom end of the radial rotating rod 7, and the first compression spring 1302 is disposed in the guide hole for connecting the buffer seat 1301 and the radial rotating rod 7.

In this embodiment, the buffer device 13 can avoid the object to be ground from rigidly contacting the polishing disc 1, and avoid the contact force from excessively scratching out deep scratches. In addition, the buffer device 13 can also reduce the stress fluctuation of the sample grinding surface in the fine adjustment process of the lifting mechanism.

In addition, a strip-shaped hole which is parallel to and communicated with the guide hole is formed in the side portion of the radial rotating rod 7, and a positioning screw 1303 arranged on the side portion of the buffer seat 1301 is inserted into the strip-shaped hole in a matching manner, so that the buffer seat 1301 can be guided in a moving manner.

Referring to fig. 2 and 3, in other embodiments, a positioning pin 802 is fitted in a pin hole at the bottom end face of the coarse adjustment barrel 402 through a second compression spring 803, a groove body communicated with the pin hole is arranged at the side part of the coarse adjustment barrel 402, the groove body extends in a direction parallel to the axis of the pin hole, a handle 804 penetrating through the groove body is arranged at the side part of the positioning pin 802, and a clamping groove 805 for clamping the handle 804 is arranged at the side part of the positioning pin 802.

In this embodiment, the handle 804 is installed on the positioning pin 802, and when the handle 804 is lifted to the position of the slot 805, the handle 804 can be clamped in the slot 805 by rotating the positioning pin 802, and at this time, the radial rotating rod 7 can rotate around the rotating shaft 18, and simultaneously, the chuck 3 is driven to rotate radially.

It can be understood that, referring to fig. 2 and 3, in other embodiments, the semi-automatic metallographic grinding apparatus of the present embodiment further includes a lead screw translation mechanism 14 disposed on the cross arm of the column 9 of the base 2, and the housing 401 of the vertical lifting mechanism 4 is fixedly mounted on the lead screw translation mechanism 14, so that the entire vertical lifting mechanism 4 is driven by the lead screw translation mechanism 14 to move horizontally, so that the collet 3 moves horizontally into the polishing disk 1 or out of the polishing disk 1. In a practical arrangement, the drive screw 1403 of the screw translation mechanism 14 intersects the central axis of the throwing disk 1, i.e. the vertical lifting mechanism 4 moves towards the center of the throwing disk 1.

Specifically, the lead screw translation mechanism 14 comprises a slider 1401, a transmission nut 1402, a transmission lead screw 1403 and a slide rail 1404, the slide rail 1404 is mounted on a cross arm, the housing 401 is mounted on the slide rail 1404 through the slider 1401, the transmission nut 1402 on the housing 401 and the lead screw form a lead screw nut mechanism, the lead screw is mounted on a bearing seat 1405 on the cross arm, the lead screw is driven to rotate through a rotating handle 1406, and the housing 401 is pushed to move back and forth on the slide rail 1404, so that the radial distance of the chuck 3 relative to the polishing disk 1 is adjusted.

Referring to fig. 2 and 4, a pressure sensor 15 may be further disposed between the chuck 3 and the mounting seat 10 of the chuck 3, a display screen 16 electrically connected to the pressure sensor 15 is disposed on the base 2, the pressure sensor 15 may transmit pressure applied to a sample grinding surface to the display screen 16, and fine adjustment may be performed by rotating the hand wheel 407 with increase of grinding amount to ensure that the sample is always ground in a constant pressure state. In addition, a speed regulating button 17 for regulating the rotating speed of the motor can be arranged on the base.

Referring to fig. 4, in some embodiments, the collet 3 includes a clamp body 301, a jaw adjusting cylinder 302, and elastic jaws 303 disposed at a lower end of the clamp body 301. The lower part of the clamp body 301 is provided with external threads which are matched with the internal threads of the clamping jaw adjusting cylinder 302, and the upper part of the clamp body is fixedly connected with the mounting seat 10. A torsion spring is arranged between the clamping jaw and the clamp body 301, when the clamping jaw adjusting cylinder 302 rotates upwards, the clamping jaw automatically opens under the action of the torsion spring, and when the clamping jaw adjusting cylinder 302 rotates downwards, the clamping jaw is pushed to close so as to clamp a test sample.

In the embodiment, the opening angle of the clamping jaw can be adjusted by rotating the clamping jaw adjusting cylinder 302, so that the sample can be conveniently clamped, and the sample only needs to be clamped once in the whole grinding process, thereby reducing the clamping error. Of course, the above is only a specific structure of the chuck 3, and it is obvious to those skilled in the art that any chuck body having the function of holding a sample in the prior art should fall within the protection scope of the chuck 3.

The specific operation steps for grinding the metallographic specimen by using the embodiment of the application are as follows:

(1) fixing No. 500 water grinding abrasive paper on the surface of the polishing disc 1, clamping a metallographic sample on the chuck 3, turning on the power switch 5, pulling out the circumferential limiting pin 405, and rotating the coarse adjusting cylinder 402 to enable the metallographic sample to quickly approach the surface of the water grinding abrasive paper; when the metallographic sample is in quick contact with the water grinding abrasive paper, the circumferential limiting pin 405 is inserted, the hand wheel 407 is rotated to finely adjust the metallographic sample until the metallographic sample is in contact with the water grinding abrasive paper, and fine adjustment is stopped after the contact pressure of the metallographic sample on the observation display screen 16 reaches a set value; after the metallographic surface is expected to be ground, lifting the lifting handle 804 to the height of the clamping groove 805, rotating the positioning pin 802 nail to place the lifting handle 804 in the clamping groove 805, rotating the radial rotating cylinder to drive the ground surface of the metallographic specimen to rotate for a certain angle, observing whether the ground surface is flat, bright and rustless, rotating the radial rotating cylinder, and inserting the positioning pin 802 nail; and if the grinding of the sample meets the requirement, the next step is carried out, otherwise, coarse adjustment and fine adjustment are carried out to continue grinding until the requirement is met.

(2) Turning off the power switch 5, replacing the 800# water abrasive paper, rotating the chuck 3 by 90 degrees along the direction of the inclined plane of the spring positioning pin 802, and turning on the power switch 5; roughly adjusting until the metallographic sample approaches the surface of the water grinding abrasive paper, and finely adjusting to enable the metallographic sample to slowly contact the water grinding abrasive paper until the contact pressure reaches a set value; after the surface is expected to be ground, lifting the lifting handle 804 to the height of the clamping groove 805, rotating the positioning pin 802 to place the lifting handle 804 in the clamping groove 805, rotating the radial rotating cylinder to drive the grinding surface of the metallographic specimen to rotate for a certain angle, observing whether the grinding surface completely covers the scratch left in the previous step, rotating the radial rotating cylinder 23, and inserting the positioning pin 802; and if the scratch is completely covered, the next step is carried out, otherwise, coarse adjustment and fine adjustment are carried out, and grinding is continued until the scratch meets the requirements.

(3) And (5) turning off the power switch 5, replacing the 1200# water grinding sand paper, and repeating the operation of the step (2).

(4) And (5) turning off the power switch 5, replacing the No. 2000 water abrasive paper, and repeating the operation of the step (2).

(5) And (5) turning off the power switch 5, replacing 500# metallographic abrasive paper, and repeating the operation in the step (2).

(6) And (3) turning off the power switch 5, replacing 800# metallographic abrasive paper, and repeating the operation in the step (2).

(7) And (3) turning off the power switch 5, replacing 1200# metallographic abrasive paper, and repeating the operation in the step (2).

(8) And (3) turning off the power switch 5, replacing 2000# metallographic abrasive paper, and repeating the operation in the step (2).

(9) And (3) turning off the power switch 5, fixing the polishing cloth on the surface of the polishing disc 1, coating polishing paste on the polishing cloth, repeating the operation in the step (2), taking down the metallographic specimen and washing the metallographic specimen after polishing, and finishing the whole grinding and polishing process.

The above examples are merely illustrative for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Nor is it intended to be exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.

Claims

1. Semi-automatic metallography grinder, including have the base of throwing the dish, be used for the centre gripping to treat the chuck of grinding the thing and drive the vertical elevating system that the chuck reciprocated, its characterized in that:

2. The abrading device of claim 1, wherein: the mounting seat of the chuck is mounted at the bottom of the radial rotating rod through a rotary support;

3. The abrading device of claim 2, wherein: a buffer device is connected between the radial rotating rod and the mounting seat, and comprises a buffer seat and a first compression spring;

4. The abrading device of claim 3, wherein: the side part of the radial rotating rod is also provided with a strip-shaped hole which is parallel to and communicated with the guide hole;

5. The abrading device of claim 2, wherein: and a pressure sensor is arranged between the chuck and the mounting seat.

6. The grinding apparatus as set forth in any one of claims 1 to 5, wherein: the horizontal moving mechanism is arranged on the base and drives the vertical lifting mechanism to move horizontally.

7. The abrading device of claim 6, wherein: the lifting mechanism comprises a shell, a coarse adjustment cylinder and a shaft body, wherein the shell, the coarse adjustment cylinder and the shaft body are arranged on the base and connected with the translation mechanism;

a locking mechanism for locking the circumferential rotation of the coarse adjustment cylinder is arranged between the shell and the coarse adjustment cylinder, and the locking mechanism comprises a plurality of locking sliding grooves which are circumferentially and uniformly distributed on the outer wall of the shell and circumferential limiting pins which are arranged on the coarse adjustment cylinder and can be inserted into or withdrawn from the locking sliding grooves; the extending direction of the locking sliding groove is parallel to the axial direction of the shaft body;

8. The abrading device of claim 7, wherein: the circumferential limiting pin is arranged in a pin mounting hole on the coarse adjustment barrel, and the tail end of the circumferential limiting pin extends out of the coarse adjustment barrel and is connected with a rotating pin cap;

9. The abrading device of claim 8, wherein: be equipped with axially extended guide way on the lateral wall of pin mounting hole, the lateral part of circumference spacing pin is equipped with inserts in the guide way, and the circumference spacing pin withdraws from the in-process of locking spout can be followed the arch outside roll-off to the coarse adjustment section of thick bamboo in the guide way.

10. The abrading device of claim 7, wherein:

the positioning pin is assembled in a pin hole in the bottom end face of the coarse adjustment cylinder through a second compression spring;