CN207937241U - A kind of metallographic specimen rubbing down clamping device - Google Patents

Abstract

A kind of metallographic specimen rubbing down clamping device, the fixed driving element in horizontal crossbearer crossbearer stage casing of " door " shaped support frame；Push rod end stationary fixture body case of the driving element towards stretching on the inside of " door " shaped support frame；Sector gear is rotatablely installed in fixture body case, sector teeth face is meshed with rack shaft；The upper crosspiece of " Contraband " shape connecting plate that left and right two panels is open opposite is clamped in the activity of rack shaft lower end；Left fastening block and right fastening block are fixed on the lower crosspiece of two panels " Contraband " shape connecting plate respectively；The opposite side of two fastening blocks surrounds specimen clamping chamber, and opposite side is the opposite inclined-plane of inclined direction, is matched with the left and right inclined inside wall of fixture body case；Second elastic element compresses downwards left fastening block and right fastening block；The present apparatus has the characteristics that easy to operate, automatic precision controlled motion, easy to remove, clamping is firm, ensures that sample is horizontal, applicability is wide, versatile.

Description

A kind of metallographic specimen rubbing down clamping device

Technical field

The utility model is related to Metallographic Analysis testing equipment fields, more particularly to a kind of to make in metallographic specimen preparation process Rubbing down clamping device.

Background technology

Metallographic Analysis is one of means of analysis of material, can show the true heterogeneous microstructure of material, to carry out gold Facies analysis must just prepare the metallographic specimen that can be used for microscopic observation inspection.In Metallographic Analysis, representational examination is prepared Sample is highly important.In general, metallographic specimen preparation will pass through following steps：Sampling, polishing, polishing and corrosion etc. Process.On variable speed polishing and burnishing machine, experimenter is usually that metallographic specimen is clamped with hand, not only time-consuming and laborious in this way, and And with danger.In this case, common processing method is that the sample preparation process first inlayed and prepared afterwards is used to complete sample preparation, But sample inlays not only inlaying equipment and inlay, cannot reuse, and time and effort consuming, waste of resource.

Currently, had using being ground and polish after some special fixture clamping metallographic specimens, this method can be with The drawbacks of artificial clamping is inlayed with metallographic specimen is solved, but usually special fixture can only be directed to a kind of sample of specification shape, but But it cannot accomplish versatility.There is also a critical issues can exactly accomplish to clamp metallographic specimen, but still needs to use Hand handle is held, in this way caused by consequence be metallographic specimen can not be waited for the levelness in grinding and polishing face ensured and make grinding and polishing face tilt, It is unfavorable for the observation and analysis of heterogeneous microstructure.

Utility model content

The technical problem to be solved by the utility model is to provide a kind of metallographic specimen rubbing down clamping devices, have operation Convenience, automatic precision controlled motion, easy to remove, clamping is firm, ensures the feature that sample is horizontal, applicability is wide, versatile.

The utility model is achieved through the following technical solutions：

Metallographic specimen rubbing down clamping device, it is characterised in that：

" door " shaped support frame includes horizontal crossbearer and is respectively arranged at two support posts at its both ends, crossbearer stage casing Fixed driving element, support post bottom are equipped with sucked type electromagnet pedestal；

Driving element is external towards stretching push rod, push rod end stationary fixture on the inside of " door " shaped support frame perpendicular to crossbearer Shell can push fixture body case to move up and down；

Sector gear is rotatablely installed in fixture body case, sector teeth face and the rack shaft of a vertical configuration are mutually nibbled It closes；The locking member for lock gear rack movement position is additionally provided on sector gear；

The upper crosspiece of " Contraband " shape connecting plate that left and right two panels is open opposite, two " Contraband " shapes are clamped in the activity of rack shaft lower end Connecting plate can be under external force relative to its vertical axial transverse translation of rack shaft；The lower crosspiece of two panels " Contraband " shape connecting plate It is upper to fix left fastening block and right fastening block respectively；

Left fastening block and the opposite side of right fastening block surround specimen clamping chamber, specimen clamping intracavitary press-fitting the first elasticity member Part；Left fastening block and the opposite side of right fastening block are the opposite inclined-plane of inclined direction, are inclined respectively with the left and right of fixture body case Oblique madial wall matches；

The second elasticity member is press-fitted between left fastening block and fixture body case, between right fastening block and fixture body case respectively Part compresses downwards left fastening block and right fastening block；

When sector gear rotates, rack shaft upper and lower translation in an axial direction is driven, left fastening block and right fastening block are with rack shaft During upper and lower translation, can along fixture body case inclined inside wall transverse shifting, be located remotely from each other or close, to change The size of specimen clamping chamber.

Wherein, " door " shaped support frame is used to fix the position of rubbing down clamp body；Driving element is for realizing rubbing down fixture Body vertically moves, and rubbing down clamp body is for realizing fastening metallographic specimen and the levelness for maintaining metallographic specimen.

Further, the driving element is hydraulic cylinder or cylinder, alternatively, driving element is preferably by point driving switch The servo electric jar of control, servo electric jar use Close loop servo control, are additionally provided on clamping device for monitoring metallographic specimen With the pressure sensor of polish-grinding plate disk contact, the control circuit of point driving switch is connected by signal line, to realize essence Close control push rod thrust achievees the purpose that fixture body case is automatic, accurately moves up and down.

Further, the left fastening block and the opposite side side of right fastening block are respectively indent " V " shape face and " Contraband " Shape face, two sides opening is opposite, and two inclined-planes and " Contraband " shape bottom surface of " V " shape constitute three clamping faces of specimen clamping chamber, to gold The clamping of phase sample is solid and reliable, as long as a kind of fixture can complete rubbing down experiment, ensure that the versatility of clamping device；This It outside, if necessary can also be by replacing different interior angles or different size of left fastening block and right fastening block, to realize Rubbing down processing to the metallographic specimen of different shape and size, applicability are wide, versatile.

Further, second elastic element includes spring and the movable guide rod being built in spring；Left fastening block With it is vertical respectively on the corresponding position of clamp body shell inner cavity, right fastening block and the clamp body shell inner cavity above it above it Mounting hole is opened up, guide rod both ends are packed into mounting hole, can be moved up and down in mounting hole, use dynamic fit system to ensure The vertical movement of spring.The spring assembly can be always ensured that left fastening block, right fastening block during up and down motion, by Under preload force effect, play the role of constantly compress fastening block can pass through gear ＆ rack structure when carrying out rubbing down processing With the dual compression fastening block of spring assembly.

Further, the sector gear is rotatably installed in left sector shaft fixed block and right sector shaft fixed block On, left sector shaft fixed block and right sector shaft fixed block are bolted on clamp body housing back panel, are convenient for Dismounting debugging.

Further, the locking member is pawl assembly, including sliding block, pawl and back-moving spring；In left sector gear The rotation of axis fixed block or right sector shaft fixed block upper edge sector gear axially opens up sliding slot, and one piece of configuration can in sliding slot The sliding block to horizontally slip along vallecular cavity length direction is equipped with clamping screw between sliding block and sliding slot；Rotational installation and sector on sliding block The pawl that gear matches, back-moving spring one end are fixed on sliding block, and the other end is extended resiliently on pawl；Initially When, pawl assembly is mutually disengaged with sector gear；When sector gear rotates, and rack shaft is driven to move to appropriate location downwards, Sliding block is slid onto into the cooperation position with sector gear along sliding slot, screws in clamping screw by slider locking in sliding slot, at this time pawl Sector gear is blocked, prevents sector gear from being inverted in the case where the elasticity of the second elastic element compresses force effect；Rack shaft is needed to move up When, sliding block is slid to the right along sliding slot, is detached from and the cooperation position of sector gear.Limit is moved left and right by controlling pawl assembly Rack shaft processed moves upwards, and realizes rack shaft self-locking and compresses the purpose of fastening block.

Further, the upper crosspiece of two panels " Contraband " the shape connecting plate is with the opposite half bore that is open, rack shaft lower end band There are one I-shaped ladder shaft parts；It opens the both sides that the upper crosspiece of two panels " Contraband " shape connecting plate is inserted into I-shaped ladder shaft part Mouthful, two half bore are matched with the left and right lateral margin of intermediate thin segment respectively.Connection can not only be played by being somebody's turn to do " Contraband " shape connecting board structure The effect of rack shaft and fastening block can also coordinate the variation of the distance between two fastening blocks to be opened and closed at any time to ensure intermal force.

Further, the sector gear is equipped with the handle for rotating sector gear, and handle stretches out fixture body case Outside is conveniently operated personnel and rotates sector gear.

When carrying out specimen clamping using above-mentioned metallographic specimen rubbing down clamping device：

The first step prepares metallographic specimen, its surface to be treated is cleared up dry；

Opposite the two of horizontal rotation polish-grinding plate disk are fixed in two pieces of sucked type electromagnet pedestal absorption by second step Fixture body case is fixed on the push rod lower end of driving element by side；

Third walks, and rotates sector gear, and rack shaft is driven to move up, to make " Contraband " shape connecting plate move up, into And the elasticity of the second elastic element is overcome to compress while power drives left fastening block and right fastening block to move up or so translation；Work as the two After separation, pending metallographic specimen upper end is put into the specimen clamping intracavitary between left fastening block and right fastening block, metallographic Sample lower end extends downwardly outside fixture body case；

4th step rotates backward sector gear, and rack shaft is driven to move down, and left fastening block and right fastening block is promoted to clamp Metallographic specimen, while also downward elasticity compresses left fastening block and right fastening block to the second elastic element, when the clamping of metallographic specimen is solid When completing surely, the movement self-locking of sector gear and rack shaft is realized by locking member；

5th step, the push rod for controlling driving element move down, and make metallographic specimen constantly close to rotation polish-grinding plate, until close to throwing Mill disk carries out polishing and polishing treatment to pending metallographic specimen surface；

After rubbing down sand paper is worn away at the cooperation position of polish-grinding plate disk and metallographic specimen, an electromagnet pedestal is broken Electricity keeps entire " door " shaped support frame logical to the electromagnet pedestal of power-off again after the electromagnet pedestal rotation that another is not powered off Electricity retightens " door " shaped support frame, with the cooperation position for adjusting metallographic specimen 14 with rotating polish-grinding plate disk, improves rubbing down The utilization rate of sand paper.

It should be noted that the restriction in claims and specification to orientation such as up, down, left, right, before and afters, only The opposite restriction of one kind used for convenience, is not the absolute limit to device configuration structure and the direction of motion.

The beneficial effects of the utility model are：

1, using can portable mobile sucked type electromagnet pedestal, it is strong by electromagnetic adsorption between clamping device and polishing and burnishing machine Power is fixed, and the absorption power-off that can be powered disappears, and realizes the portability and mobility purpose of clamping device；

2, moving up and down for clamp body is controlled using servo electric jar, realizes high-accuracy motion control；It is conveniently adjusted to watch It takes the cooperation of electric cylinder push rod and crossbearer and is combined together by sector gear and rack shaft, solve existing skill well Art is difficult to ensure the problem of levelness in the pending face of metallographic specimen, clamping and positioning reliability, ensures the pending of metallographic specimen After rubbing down, surface polishing scratch is unanimously uniform in face；

3, easy to operate, and operator need not Handheld clamp always, manpower can be saved；

4, according to the preparation of the metallographic specimen of common different-diameter and shape, as long as a kind of fixture can complete rubbing down reality It tests, ensure that the versatility of clamping device；In addition, if necessary can also be by replacing different interior angles or different size Left fastening block and right fastening block, to realize that the rubbing down to the metallographic specimen of different shape and size is handled, applicability is wide, general Property is strong；

5, automatic precision controlled motion, it is easy to remove, it clamps and consolidates, to simplify experimental implementation flow, improve reality Test efficiency.

Description of the drawings

Fig. 1 is a kind of stereoscopic schematic diagram of preferred embodiment of the utility model；

Fig. 2 is the enlarged diagram of fixture body case and its internal structure in Fig. 1；

Fig. 3, Fig. 4 are for the positive side view of fixture body case and backwards to side perspective schematic diagram；

Fig. 5 is the front view of Fig. 2；

Fig. 6 is the stereoscopic schematic diagram of left sector shaft fixed block；

Fig. 7 is the stereoscopic schematic diagram of right sector shaft fixed block；

Fig. 8 is the stereoscopic schematic diagram of sector gear；

Fig. 9 is the cooperation position schematic diagram of sector gear and pawl assembly；

Figure 10 is the explosive view (removal back-moving spring) of pawl assembly；

Figure 11 is the stereoscopic schematic diagram of pawl assembly；

Figure 12 is the stereoscopic schematic diagram of rack shaft；

Figure 13 is the stereoscopic schematic diagram of " Contraband " shape connecting plate；

Figure 14 is the stereoscopic schematic diagram of the second elastic element；

Figure 15 is the stereoscopic schematic diagram of left fastening block；

Figure 16 is the stereoscopic schematic diagram of right fastening block；

In Fig. 1~16：1 is driving element, and 2 be crossbearer, and 3 be support post, and 4 be sucked type electromagnet pedestal, and 5 be fixture Body case, 6 be left fastening block, and 7 be right fastening block, and 8 be " Contraband " shape connecting plate, and 9 be left sector shaft fixed block, and 10 be pawl Component, 101 be sliding block, and 102 be pawl, and 103 be back-moving spring, and 11 be right sector shaft fixed block, and 12 be sector gear, 121 be handle, and 13 be the first elastic element, and 14 be metallographic specimen, and 15 be the second elastic element, and 151 be spring, and 152 be guiding Bar, 16 be rack shaft, and 17 be sliding slot.

Specific implementation mode

The utility model is described in further detail below in conjunction with the accompanying drawings.

Metallographic specimen rubbing down clamping device as shown in Figure 1, including " door " shaped support frame and be mounted on " door " font branch The rubbing down clamp body of upper and lower translation is driven on the inside of support, by driving element 1, wherein " door " shaped support frame is for fixing rubbing down The position of clamp body；Driving element 1 vertically moves for realizing rubbing down clamp body, and rubbing down clamp body is for realizing fastening metallographic Sample 14 and the levelness for maintaining metallographic specimen 14.

" door " shaped support frame as shown in Figure 1, including the horizontal crossbearer 2 of plate and it is respectively arranged at two of its both ends Support post 3；2 stage casing of crossbearer opens up the installation through-hole for being fixedly mounted with driving element 1, and in the present embodiment, driving element 1 is to pass through The servo electric jar of point driving switch control, servo electric jar use Close loop servo control, are additionally provided on clamping device for monitoring The pressure sensor of metallographic specimen 14 and polish-grinding plate disk contact controls push rod thrust using pressure sensor precision, with Achieve the purpose that fixture body case 5 is automatic, accurately move up and down；3 bottom of support post is equipped with sucked type electromagnet pedestal 4, inhales Coiled electrical magnet pedestal be cylinder electromagnetism iron material, from top down process uniformly distributed four for and support post 3 connection Threaded hole.

As shown in Figure 1, servo electric jar stretches out push rod perpendicular to crossbearer 2 towards " door " shaped support frame inboard, upright, push away Boom end carries board-like mounting structure, and the push rod of servo electric jar is connected with fixture body case by hexagon socket cap head screw It connects, on the basis of crossbearer, maintains fixture body case horizontal by the push rod of servo electric jar, realize that clamp body keeps levelness mesh 's.

It is fixedly connected on 5 top of fixture body case of rubbing down clamp body by several studs, can push outside clamp body Shell 5 moves up and down.

As shown in Fig. 2, Fig. 5, fixture body case 5 is hollow cast structure body, interior to be equipped with sector gear 12, sector gear It is welded with the handle 121 for rotating sector gear 12 on 12, and is equipped on the covering of the fan of sector gear 12 for installing wheel shaft Through-hole, as shown in figure 8, handle 121 stretches out outside fixture body case 5 to facilitate hand-held rotation, as shown in Figure 4；Such as Fig. 5 institutes Showing, the wheel shaft both ends of sector gear 12 are rotatably installed on left sector shaft fixed block 9 and right sector shaft fixed block 11, As shown in Figure 6, Figure 7, left sector shaft fixed block 9 and right sector shaft fixed block 11 are block structure, respectively by two Partial stack is constituted, and two is fixed as one by bolt, the bolt is also by left sector shaft fixed block 9 or right sector Wheel shaft fixed block 11 is fixedly mounted on 5 backboard of fixture body case.

The flank of tooth of sector gear 12 is meshed with the rack shaft 16 of a vertical configuration；It is additionally provided with and is used on sector gear 12 The locking member of lock gear rack movement position；As shown in figure 9, in the present embodiment, locking member is pawl assembly 10, including Sliding block 101, pawl 102 and back-moving spring 103, make rack shaft freely move downward.

As shown in fig. 7, the rotation in 11 upper edge sector gear 12 of right sector shaft fixed block axially opens up sliding slot 17, it is sliding One piece of configuration can be equipped with locking along the sliding block 101 that vallecular cavity length direction horizontally slips in slot 17 between sliding block 101 and sliding slot 17 Bolt；As shown in Figure 10, Figure 11, the pawl 102 that rotational installation matches with sector gear 12 on sliding block 101, back-moving spring 103 One end is fixed on sliding block 101, and the other end is extended resiliently on pawl 102；When initial, pawl assembly 10 and sector Wheel 12 is mutually disengaged；When sector gear 12 rotates, and rack shaft 16 is driven to move to appropriate location downwards, by sliding block 101 along cunning Slot 17 slides onto the cooperation position with sector gear 12 to the left, screws in clamping screw and sliding block 101 is locked in sliding slot 17, at this time spine Pawl 102 blocks sector gear 12, prevents sector gear 12 from being inverted in the case where the elasticity of the second elastic element 15 compresses force effect；It needs When rack shaft 16 moves up, sliding block 101 slid to the right along sliding slot 17, be detached from and the cooperation position of sector gear 12.Pass through control Pawl assembly 10 processed moves left and right limitation rack shaft 16 and moves upwards, and realizes rack shaft self-locking and compresses the purpose of fastening block.

It lives with 12 matched engaging tooth of sector gear, 16 lower end of rack shaft as shown in figure 5,16 upper end of rack shaft is processed The upper crosspiece for " Contraband " the shape connecting plate 8 that the dynamic left and right two panels of clamping is open opposite；As shown in figure 13, two panels " Contraband " shape connecting plate 8 Upper crosspiece is with the opposite half bore that is open, and as shown in figure 12, there are one I-shaped ladder shaft parts for 16 lower end band of rack shaft；Two panels The upper crosspiece of " Contraband " shape connecting plate 8 is inserted into the both-side opening of I-shaped ladder shaft part, two half bore respectively with intermediate thin segment Left and right lateral margin matches；As shown in figure 5, two " Contraband " shape connecting plates 8 can be vertical relative to rack shaft 16 under external force Its axial transverse translation；Through-hole is processed respectively on the lower crosspiece of two panels " Contraband " shape connecting plate 8, and left fastening block is fixed for bolt 6 and right fastening block 7.

Left fastening block 6 and the opposite side of right fastening block 7 surround specimen clamping chamber, the first elasticity of specimen clamping intracavitary press-fitting Element 13；The opposite side side of left fastening block 6 and right fastening block 7 as shown in Figure 15, Figure 16 be respectively indent " V " shape face and " Contraband " shape face, two sides opening is opposite, and two inclined-planes and " Contraband " shape bottom surface of " V " shape constitute three clamping faces of specimen clamping chamber, Left fastening block 6 and right fastening block 7 are matched for clamping tightly metallographic specimen 14 by 3 points, coordinate limitation metallographic examination with " Contraband " shape connecting plate 8 The purpose that metallographic specimen 14 is fixedly clamped completely under holding level is realized in the up and down motion of sample 14；Further, it is also possible to by more Different interior angles or different size of left fastening block 6 and right fastening block 7 are changed, to realize the metallographic to different shape and size The rubbing down of sample 14 is handled, and improves the versatility of this clamping device.

As shown in figure 5, being pressed respectively between left fastening block 6 and fixture body case 5, between right fastening block 7 and fixture body case 5 With the second elastic element 15, left fastening block 6 and right fastening block 7 are compressed downwards；In the present embodiment, as shown in figure 14, the second elasticity Element 15 includes spring 151 and the movable guide rod 152 being built in spring；Left fastening block 6 and the fixture body case 5 above it It is vertical respectively on the corresponding position of inner cavity, right fastening block 7 and 5 inner cavity of fixture body case above it to open up mounting hole, guide rod 152 both ends are packed into mounting hole, can be moved up and down in mounting hole.

As shown in figure 5, left fastening block 6 and side that right fastening block 7 the is opposite inclined-plane that be inclined direction opposite, respectively with folder The left and right inclined inside wall of specific shell 5 matches；When sector gear 12 rotates, the upper and lower translation in an axial direction of rack shaft 16 is driven, Left fastening block 6 and right fastening block 7, can be along the sloped inboards of fixture body case 5 during with 16 upper and lower translation of rack shaft Wall transverse shifting is located remotely from each other or close, to change the size of specimen clamping chamber.

When carrying out Metallographic Analysis for Ф 10 × 100mm experiment aluminium bars after abundant solidification, aluminium bar is cut, institute The specimen size obtained is 10 × 15mm of Ф, if holding sample metallographic rubbing down using artificial, does not simply fail to guarantee levelness, and Also time-consuming and laborious there can be certain risk with operator；If using method for embedding, after rubbing down, removal is needed to inlay material Material, so not only trouble in experimental implementation, but also also easily destroy metallographic structure, cause can waste of resource, increase experiment at This consequence.

Use this clamping device be clamped sample the step of for：

The first step prepares metallographic specimen, its surface to be treated is cleared up dry；

Two pieces of sucked type electromagnet pedestals 4 are adsorbed the phase for being fixed on horizontal rotation polish-grinding plate disk outer rim by second step To both sides, support post 3 is crossed into hexagon-headed bolt and is fixed on sucked type electromagnet pedestal 4, makes crossbearer 2 across rotation rubbing down Disk disk；2 stage casing part of crossbearer is connected through a screw thread with the flange of servo electric jar to be matched, and fixture body case 5 is installed solid It is scheduled on the push rod lower end of servo electric jar；

Third walks, and pulls handle 121 to rotate sector gear 12, drives rack shaft 16 to move up, to make " Contraband " shape Connecting plate 8 moves up, and then overcomes the elasticity of the second elastic element 15 to compress power and drive on left fastening block 6 and right fastening block 7 It is translated while shifting or so；After the two detaches, pending 14 upper end of cylindrical metallographic specimen is put into 6 He of left fastening block Specimen clamping intracavitary between right fastening block 7, metallographic specimen lower end extend downwardly outside fixture body case 5；

4th step reversely pulls handle 121 to rotate backward sector gear 12, drives rack shaft 16 to move down, promote Left fastening block 6 and right fastening block 7 clamp metallographic specimen 14, while also downward elasticity compresses left fastening block 6 to the second elastic element 15 With right fastening block 7, when metallographic specimen 14 be fixedly clamped completion when, mobile pawl assembly 10 realizes sector gear 12 and rack shaft 16 movement self-locking；

5th step, the push rod that servo electric jar is controlled by point driving switch move down, and make metallographic specimen 14 constantly close to rotation Polish-grinding plate carries out polishing and polishing treatment until close to polish-grinding plate disk to pending metallographic specimen surface；

After rubbing down sand paper is worn away at the cooperation position of polish-grinding plate disk and metallographic specimen 14, by an electromagnet pedestal 4 Power-off, again to the electromagnetism iron-based of power-off after making the electromagnet pedestal 4 that entire " door " shaped support frame is not powered off around another rotate Seat 4 is powered, and retightens " door " shaped support frame, with the cooperation position for adjusting metallographic specimen 14 with rotating polish-grinding plate disk, carries The utilization rate of high rubbing down sand paper.

The clamping device is to the cylinder of different-diameter and length, oval circle, cuboid or other standards shape Metallographic specimen 14 is still effective.

Claims (8)

1. a kind of metallographic specimen rubbing down clamping device, it is characterised in that：

" door " shaped support frame includes horizontal crossbearer (2) and is respectively arranged at two support posts (3) at its both ends, crossbearer (2) the fixed driving element in stage casing (1), support post (3) bottom are equipped with sucked type electromagnet pedestal (4)；

Driving element (1) stretches out push rod, push rod end stationary fixture body perpendicular to crossbearer (2) towards " door " shaped support frame inside Shell (5) can push fixture body case (5) to move up and down；

Rotational installation sector gear (12), the tooth of the flank of tooth and a vertical configuration of sector gear (12) in fixture body case (5) Axis (16) is meshed；The locking member for lock gear rack movement position is additionally provided on sector gear (12)；

The upper crosspiece for " Contraband " the shape connecting plate (8) that left and right two panels is open opposite, two " Contraband " are clamped in rack shaft (16) lower end activity Shape connecting plate (8) can be under external force relative to its vertical axial transverse translation of rack shaft (16)；Two panels " Contraband " shape connects Left fastening block (6) and right fastening block (7) are fixed on the lower crosspiece of plate (8) respectively；

Left fastening block (6) and the opposite side of right fastening block (7) surround specimen clamping chamber, the first elasticity of specimen clamping intracavitary press-fitting Element (13)；Left fastening block (6) and the opposite side of right fastening block (7) are the opposite inclined-plane of inclined direction, respectively with clamp body The left and right inclined inside wall of shell (5) matches；

It is press-fitted second respectively between left fastening block (6) and fixture body case (5), between right fastening block (7) and fixture body case (5) Elastic element (15) compresses downwards left fastening block (6) and right fastening block (7)；

When sector gear (12) rotates, rack shaft (16) upper and lower translation in an axial direction, left fastening block (6) and right fastening block (7) are driven It, can be along the inclined inside wall transverse shifting, mutually remote of fixture body case (5) during with rack shaft (16) upper and lower translation From or it is close, to change the size of specimen clamping chamber.

2. metallographic specimen rubbing down clamping device according to claim 1, it is characterised in that：The driving element (1) is liquid Cylinder pressure or cylinder, alternatively, driving element (1) is the servo electric jar controlled by point driving switch, servo electric jar is used and is closed Ring SERVO CONTROL is additionally provided with pressure sensor on clamping device, passes through the control circuit that signal line connects point driving switch.

3. metallographic specimen rubbing down clamping device according to claim 1, it is characterised in that：The left fastening block (6) and the right side The opposite side side of fastening block (7) is respectively indent " V " shape face and " Contraband " shape face, and two sides opening is opposite, and the two of " V " shape are oblique Face and " Contraband " shape bottom surface constitute three clamping faces of specimen clamping chamber.

4. metallographic specimen rubbing down clamping device according to claim 1, it is characterised in that：

Second elastic element (15) includes spring (151) and the movable guide rod (152) being built in spring；Left fastening block (6) the correspondence position of fixture body case (5) inner cavity, right fastening block (7) and above it and fixture body case (5) inner cavity above it Set it is vertical respectively open up mounting hole, guide rod (152) both ends are packed into mounting hole, can be moved up and down in mounting hole.

5. metallographic specimen rubbing down clamping device according to claim 1, it is characterised in that：Sector gear (12) rotation On left sector shaft fixed block (9) and right sector shaft fixed block (11), left sector shaft fixed block (9) and Right sector shaft fixed block (11) is bolted on fixture body case (5) backboard.

6. metallographic specimen rubbing down clamping device according to claim 5, it is characterised in that：

The locking member is pawl assembly (10), including sliding block (101), pawl (102) and back-moving spring (103)；

It is axial in the rotation of left sector shaft fixed block (9) or right sector shaft fixed block (11) upper edge sector gear (12) Sliding slot (17) is opened up, one piece of configuration can be along the sliding block (101) that vallecular cavity length direction horizontally slips, sliding block in sliding slot (17) (101) clamping screw is equipped between sliding slot (17)；

The pawl (102) that rotational installation matches with sector gear (12) on sliding block (101), back-moving spring (103) one end is fixed On sliding block (101), the other end is extended resiliently on pawl (102)；

When initial, pawl assembly (10) is mutually disengaged with sector gear (12)；

When sector gear (12) rotate, and rack shaft (16) is driven to move to appropriate location downwards, by sliding block (101) along sliding slot (17) it slides onto and sliding block (101) is locked in sliding slot (17) with the cooperation position of sector gear (12), screw-in clamping screw, at this time Pawl (102) blocks sector gear (12), prevents sector gear (12) from compressing force effect in the elasticity of the second elastic element (15) Lower reversion；

When rack shaft (16) being needed to move up, sliding block (101) slid to the right along sliding slot (17), be detached from and match with sector gear (12) Close position.

7. metallographic specimen rubbing down clamping device according to claim 1, it is characterised in that：Two panels " Contraband " the shape connecting plate (8) upper crosspiece is with the opposite half bore that is open, and there are one I-shaped ladder shaft parts for rack shaft (16) lower end band；Two panels " Contraband " The upper crosspiece of shape connecting plate (8) is inserted into the both-side opening of I-shaped ladder shaft part, two half bore left side with intermediate thin segment respectively Margo dexter matches.

8. metallographic specimen rubbing down clamping device according to claim 1, it is characterised in that：It is set on the sector gear (12) It is useful for the handle (121) of rotation sector gear (12), it is external that handle (121) stretches out fixture body case (5).