CN115592523A

CN115592523A - Multifunctional sample block grinding mechanism and sample block cambered surface grinding method

Info

Publication number: CN115592523A
Application number: CN202211334751.8A
Authority: CN
Inventors: 李大印; 高义涛
Original assignee: Shandong Yuxi Instrument Co ltd
Current assignee: Shandong Yuxi Instrument Co ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-01-13

Abstract

The invention relates to a multifunctional sample block grinding mechanism and a sample block cambered surface grinding method. The multifunctional sample block grinding mechanism comprises a grinding head assembly, a feeding assembly, a grinding support and a positioning clamp; the grinding support is arranged on the feeding assembly and is positioned on one side of the grinding wheel in the grinding head assembly; the grinding support comprises a bottom plate and a support, the bottom plate is connected with the support through a rotary pin and a screw, and the rotary pin is positioned in the center of the support in the width direction; the positioning fixture is used for positioning and clamping the sample block, and the positioning fixture is detachably arranged on the support of the grinding support. The invention realizes that the grinding of the plane and the grinding of the cambered surface can be finished on the same equipment, and the positioning and clamping are convenient and accurate, thereby improving the working efficiency and the grinding quality of the sample block and reducing the equipment cost.

Description

Multifunctional sample block grinding mechanism and sample block cambered surface grinding method

Technical Field

The invention relates to the technical field of machining equipment, in particular to a multifunctional sample grinding mechanism and a sample cambered surface grinding method.

Background

In the brake system of car, the brake block is the most critical safety part, and the brake block plays decisive role is all good or bad to all brake effects, so the brake block of saying is the protection spirit of people and car, and in order to guarantee the quality of brake block, necessary testing test, for example hand sample bench test, frictional behavior drag test, friction experiment and shear strength test etc. need be carried out to the brake block when making.

A small sample block is required to be taken from a brake pad for testing when a detection test is carried out, the sample block is firstly cut into a required size, then the cut sample block is ground, so that the size precision requirement of the detection sample block is met, the shape of the sample block needing to be ground is planar and has an arc surface, most of devices on the market can only grind a plane or can only grind the arc surface, and thus two grinding devices are required to be prepared for a sampling factory, the equipment cost is increased, and the working efficiency is low.

Disclosure of Invention

In order to solve the technical problems, the invention provides a multifunctional sample grinding mechanism and a sample cambered surface grinding method, which can finish grinding a plane and a grinding cambered surface on the same equipment, are convenient and accurate in positioning and clamping, improve the working efficiency and the sample grinding quality, and reduce the equipment cost.

In order to achieve the above purpose, on one hand, the invention adopts the technical scheme that: a multifunctional sample block grinding mechanism comprises a grinding head assembly, a feeding assembly, a grinding support and a positioning clamp; the grinding support is arranged on the feeding assembly and is positioned on one side of the grinding wheel in the grinding head assembly; the grinding support comprises a bottom plate and a support, the bottom plate is connected with the support through a rotary pin and a screw, and the rotary pin is positioned in the center of the support in the width direction; the positioning fixture is used for positioning and clamping the sample block, and the positioning fixture is detachably arranged on the support of the grinding support.

In the technical scheme, the base plate is connected with the support through the rotary pin and the screw, when a sample block is ground to be a plane, the screw is screwed, the base plate and the support are locked, and the surface to be processed of the sample block is parallel to the surface of the grinding wheel, so that plane grinding can be carried out; when the arc surface of the sample block is ground, the screw is unscrewed or loosened, only the rotating pin is left, the support can drive the positioning clamp to do circular motion around the rotating pin, and the arc surface grinding is realized by rotating and feeding the sample block.

By adopting the technical scheme, the plane and the cambered surface can be ground on one grinding mechanism; the two functions improve the working efficiency and the sample block grinding quality, and reduce the equipment cost.

Preferably, the support comprises a horizontal plate and a vertical plate, the horizontal plate is vertically and fixedly connected with the vertical plate, the horizontal plate is connected with the bottom plate, the vertical plate is connected with the positioning fixture, and a reinforcing rib plate is arranged on the vertical surface, far away from the positioning fixture, of the horizontal plate and the vertical plate.

By adopting the technical scheme, the horizontal plate and the vertical plate are arranged to realize the fixation of the positioning fixture and the connection with the bottom plate, so that the grinding of the arc surface is realized, and the vertical precision and the flatness of the plane grinding are ensured.

Preferably, the positioning fixture comprises a bracket, a lifting screw rod and a lifting pressure plate; the bracket is detachably connected with the vertical plate of the support, and is a vertically arranged rectangular frame structure; the lifting screw rod longitudinally penetrates through the upper transverse frame and the lower transverse frame of the bracket and is connected with the upper transverse frame and the lower transverse frame through bearings, and the upper end of the lifting screw rod is provided with a knob; the lifting and lowering plate is in threaded fit with the lifting screw rod, the lifting and lowering plate is in sliding connection with the two vertical frames of the support, and the two vertical frames of the support are respectively provided with sliding grooves matched with the two ends of the lifting and lowering plate.

Through adopting this technical scheme, threaded connection pressure rising and dropping board on the lift lead screw can realize that pressure rising and dropping board upwards can press from both sides tight work piece with last horizontal frame cooperation location, and pressure rising and dropping board can press from both sides tight work piece with horizontal frame cooperation location down, and two location clamp structures appear in a structure, and design benefit and with low costs, and the straightness accuracy that pressure rising and dropping board goes up and down has been guaranteed in the design of spout in addition, and then has guaranteed the positioning accuracy to the work piece.

Preferably, a first positioning groove is formed in the lower end, away from the side vertical face of the vertical plate, of the upper transverse frame of the support, a second positioning groove is formed in the upper end, away from the side vertical face of the vertical plate, of the lower transverse frame of the support, a third positioning groove is formed in the upper end, away from the side vertical face of the vertical plate, of the lifting pressing plate, a fourth positioning groove is formed in the lower end, away from the side vertical face of the vertical plate, of the lifting pressing plate, the first positioning groove is as deep as the third positioning groove, and the second positioning groove is as deep as the fourth positioning groove.

The positioning accuracy of the positioning fixture to the workpiece is guaranteed through the arrangement of the first positioning groove, the second positioning groove, the third positioning groove and the fourth positioning groove, and the grinding quality is improved.

Preferably, the grinding mechanism further comprises a clamp body, the clamp body is detachably mounted on the positioning clamp, and the clamp body is positioned and clamped through the pressure rising and reducing plate and the transverse frame of the support.

When the technical scheme is used for grinding the arc surface, the sample block is firstly installed on the clamp body, then the clamp body is installed on the positioning clamp, and the adjustability of the arc surface radian can be realized by changing the length of the clamp body so as to adapt to different size requirements of various test standards on the sample block radian.

Preferably, the clamp body comprises a clamping part, an extension bar and two elastic pieces; the clamping part and the extension bar are integrally formed or fixedly connected, and the two elastic sheets are symmetrically arranged on two sides of the extension bar; a lug boss is arranged on the side surface of the clamping part far away from the extension bar; a positioning boss matched with the size of the sample block is arranged on the end face of the extension bar, which is far away from the clamping part; the shell fragment includes installation regulating part and clamping part, and the clamping part is the shell fragment and bends the gained, and installation regulating part passes through the screw connection with the extension bar, and the clamping part of two shell fragments is bent towards relative direction, and clamping part is located the one side that the clamping part was kept away from to the extension bar.

In the technical scheme, the positioning precision of the clamp body and the positioning clamp is ensured by the design of the lug boss on the clamping part, the workpiece is accurately positioned by the positioning lug boss on the extension rod, the positioning lug boss can be set to be matched with the workpiece in different sample block sizes, so that the positioning is simple and accurate, and the locking is simple, safe and reliable by the design of clamping through the elastic sheet.

Preferably, two positioning pins are further arranged between the bottom plate and the horizontal plate for positioning, a screw passing hole is formed in the horizontal plate, and the screw passing hole is an arc groove which takes the center of the rotary pin hole as the circle center.

According to the technical scheme, two positioning pins are required to be installed when a plane is ground, the arrangement ensures the matching precision of the positioning clamp and the bottom plate, and further ensures the precision requirement of plane grinding; and the screw passes the hole and is the design in circular arc groove, has played the effect of dodging the screw, has realized when the grinding arc face, need not unscrew the screw completely, only needs the unscrewing, can realize positioning fixture's rotation, and this design has improved work efficiency.

Preferably, the feeding assembly is connected with a digital display device through signals.

By adopting the technical scheme, the size of the sample block is ensured to be accurate, manual measurement is not needed in the grinding process, and only accurate reading is needed, so that the trouble of using a vernier caliper and the error caused by manual measurement are eliminated.

On the other hand, the invention provides a sample block cambered surface grinding method, which uses a multifunctional sample block grinding mechanism to carry out the following steps:

embedding the cut sample block into a positioning clamp for positioning and clamping;

the position of the positioning fixture is adjusted through the feeding assembly, so that the grinding wheel is just contacted with the sample block;

the screws for connecting the bottom plate and the support are removed or unscrewed, and only the rotating pin is reserved;

and starting the grinding head assembly, manually controlling the positioning clamp to rotate around the rotating pin, and grinding the arc surface with the preset diameter.

Preferably, the specific steps of embedding the cut sample block into a positioning clamp for positioning and clamping are as follows:

installing a sample block on the fixture body, positioning the sample block through a positioning boss matched with the size of the sample block, and adjusting the elastic sheet to clamp the sample block;

and (3) mounting the fixture body on a positioning fixture, and positioning and clamping through the pressure rising and reducing plate and the transverse frame of the bracket.

By adopting the technical scheme, the accurate positioning of the sample block is realized when the arc surface is ground, the processing precision of the sample block is ensured, the adjustability of the radian of the sample block is realized, and the universality of the grinding mechanism is realized.

In summary, the invention has the following beneficial technical effects:

1. in the technical scheme that the base plate and the support are connected through the rotary pin and the screw, when a sample block is ground to be a plane, the screw is screwed, the base plate and the support are locked, and the surface to be processed of the sample block is parallel to the surface of the grinding wheel, so that plane grinding can be performed; when the arc surface of the sample block is ground, the screw is unscrewed or loosened, only the rotating pin is left, the support can drive the positioning clamp to do circular motion around the rotating pin, and the arc surface grinding is realized by rotating and feeding the sample block; the grinding mechanism realizes that a plane and a cambered surface can be ground on one grinding mechanism; the two functions improve the working efficiency and the sample block grinding quality, and reduce the equipment cost.

2. Through adopting the technical scheme of threaded connection pressure rising and dropping board on the lift lead screw, realized that the pressure rising and dropping board upwards can with last horizontal frame cooperation location press from both sides tight work piece, the pressure rising and dropping board can press from both sides tight work piece with horizontal frame cooperation location down downwards, two location clamp structures appear in a structure, design benefit and with low costs, the straightness accuracy that the pressure rising and dropping board goes up and down has been guaranteed in the design of spout in addition, and then guaranteed the positioning accuracy to the work piece, simultaneously through the setting of constant head tank one, constant head tank two, the positioning accuracy of positioning fixture to the work piece has been guaranteed to constant head tank three and constant head tank four, the grinding quality has been improved.

3. By adopting the technical scheme that the sample block is arranged on the clamp body firstly, and then the clamp body is arranged on the positioning clamp, the adjustability of the arc surface radian can be realized by changing the length of the clamp body so as to adapt to different size requirements of various test standards on the radian of the sample block.

Drawings

FIG. 1 is a schematic view of a multifunction grinding mechanism grinding a cambered surface;

FIG. 2 is a schematic view of a grinding plane of the multifunction grinding mechanism;

FIG. 3 is a schematic view of a grinding mechanism and positioning fixture;

FIG. 4 is an enlarged view of a portion of FIG. 1 at I;

FIG. 5 is an enlarged view of a portion of FIG. 2 at II;

FIG. 6 is a schematic view of the clamp body;

fig. 7 is a schematic view of the spring plate.

Description of reference numerals: 1-a grinding head assembly;

2-grinding the support; 21-a bottom plate; 22-a support; 221-horizontal plate; 222-vertical plates; 223-reinforcing rib plates; 23-a pivot pin; 24-screws; 25-a locating pin; 26-screw through hole;

3, positioning a clamp; 31-a scaffold; 32-lifting screw rod; 33-voltage rising and lowering plate; 34-a chute; 35-positioning a groove I; 36-positioning groove two; 37-positioning groove III; 38-locating slot four; 39-a knob;

4-a clamp body; 41-a clamping part; 42-extension bar; 43-spring plate; 431-mounting adjustment; 432-a clamping portion; 44-boss; 45-positioning the boss;

5-sample block.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1

The embodiment discloses a multifunctional sample block grinding mechanism, and referring to fig. 1 and 3, the multifunctional sample block grinding mechanism comprises a grinding head assembly 1, a feeding assembly, a grinding support 2 and a positioning clamp 3; the grinding support 2 is arranged on the feeding assembly and is positioned on one side of the grinding wheel in the grinding head assembly 1; the grinding support 2 comprises a bottom plate 21 and a support 22, the bottom plate 21 and the support 22 are connected through a rotary pin 23 and a screw 24, and the rotary pin 23 is positioned at the center of the support 22 in the width direction; the positioning fixture 3 is used for positioning and clamping the sample block 5, and the positioning fixture 3 is detachably arranged on the support 22 of the grinding support 2.

Referring to fig. 3, the support 22 includes a horizontal plate 221 and a vertical plate 222, the horizontal plate 221 and the vertical plate 222 are vertically and fixedly connected, the horizontal plate 221 is connected with the bottom plate 21, the vertical plate 222 is connected with the positioning fixture 3, and a reinforcing rib plate 223 is disposed on a vertical surface of the horizontal plate 221 and the vertical plate 222 away from the positioning fixture.

Referring to fig. 1 and 2, the positioning jig 3 includes a bracket 31, a lifting screw 32, and a lifting/lowering plate 33; the bracket 31 is detachably connected with the vertical plate 222 of the support 22, and the bracket 31 is a vertically arranged rectangular frame structure; the lifting screw rod 32 longitudinally passes through the upper transverse frame and the lower transverse frame of the bracket 31 and is connected with the upper transverse frame and the lower transverse frame through bearings, and the upper end of the lifting screw rod 32 is provided with a knob 39; the pressure increasing and reducing plate 33 is in threaded fit with the pressure increasing and reducing screw rod 32, the pressure increasing and reducing plate 33 is in sliding connection with two vertical frames of the support 31, and sliding grooves 34 matched with two ends of the pressure increasing and reducing plate 33 are respectively arranged on the two vertical frames of the support 31.

Referring to fig. 1 and 4, a first positioning groove 35 is formed in the lower end of the upper transverse frame of the support 31, which is far away from the side vertical surface of the vertical plate 222, a first positioning groove 35 is formed in the upper end of the lower transverse frame of the support 31, which is far away from the side vertical surface of the vertical plate 222, and a third positioning groove 37 is formed in the upper end of the lifting pressing plate 33, which is far away from the side vertical surface of the vertical plate 222.

Referring to fig. 2 and 5, the lower end of the side vertical surface of the pressure rising and reducing plate 33 far away from the vertical plate 222 is provided with a positioning groove four 38, the depth of the positioning groove one 35 is the same as that of the positioning groove three 37, and the depth of the positioning groove two 36 is the same as that of the positioning groove four 38.

Referring to fig. 1 and 6, the sample block grinding mechanism further comprises a clamp body 4, the clamp body 4 is detachably mounted on the positioning clamp 3, and the clamp body 4 is positioned and clamped through the pressure rising and reducing plate 33 and the transverse frame of the support 31. The clamp body 4 comprises a clamping part 41, an extension bar 42 and two elastic sheets 43; the clamping part 41 and the extension bar 42 are integrally formed or fixedly connected, and the two elastic sheets 43 are symmetrically arranged at two sides of the extension bar 42; a lug boss 44 is arranged on the side surface of the clamping part 41 far away from the extension bar 42; a positioning boss 45 matched with the size of the sample block 5 is arranged on the end face of the extension bar 42 far away from the clamping part 41; referring to fig. 7, the resilient plate 43 includes an installation adjustment portion 431 and a clamping portion 432, the clamping portion 432 is formed by bending the resilient plate 43, the installation adjustment portion 431 is connected to the extension bar 42 by the screw 24, the clamping portions 432 of the two resilient plates 43 are bent in opposite directions, and the clamping portion 432 is located on one side of the extension bar 42 away from the clamping portion 41.

Referring to fig. 3, still be provided with two locating pins 25 between bottom plate 21 and the horizontal plate 221 and fix a position the bottom plate, be provided with the screw on the horizontal plate 221 and pass hole 26, the screw passes hole 26 and is the circular arc groove that uses the center in gyration pin 23 hole as the centre of a circle, and signal connection has digital display on the feeding subassembly.

Example 2

The embodiment discloses a sample block arc surface grinding method, and referring to fig. 1 and 6, the embodiment uses the multifunctional sample block grinding mechanism in embodiment 1 to carry out the following steps:

1. will cut good appearance piece 5 embedding positioning fixture 3 interior positioning clamp tightly, concrete step is: firstly, a sample block 5 is arranged on a clamp body 4, the sample block 5 is positioned by a positioning boss 45 matched with the size of the sample block, and an elastic sheet 43 is adjusted to clamp the sample block; the fixture body 4 is mounted on the positioning fixture 3, the rotary knob 39 is positioned and clamped through the pressure rising and reducing plate 33 and the lower transverse frame of the support 31, and is positioned through the positioning groove four 38 and the positioning groove two 36, so that the lower transverse frame of the pressure rising and reducing plate 33 and the support 31 is positioned and clamped, the position without the grinding wheel in the middle of the grinding wheel is avoided, and the grinding wheel can cover the processed surface of the whole sample block 5.

2. The position of the positioning clamp 3 is adjusted through the feeding assembly, so that the grinding wheel is just contacted with the sample block 5;

3. the screw 24 connecting the base plate 21 and the support 22 is removed or unscrewed, leaving only the pivot pin 23;

4. and starting the grinding head assembly 1, and manually controlling the positioning clamp 3 to rotate around the rotating pin 23 to grind the arc surface with the preset diameter.

Example 3

The present embodiment discloses a sample block plane grinding method, and the multifunctional sample block grinding mechanism used in the present embodiment is different from that in embodiment 1 in that: the clamp body 4 is not included.

Referring to fig. 2, the specific steps are as follows:

1. and (3) placing the cut sample block 5 into the first positioning groove 35, then rotating the knob 39 to lift the pressure and rise plate 33, so that the lower end of the sample block 5 is clamped into the third positioning groove 37 of the pressure and rise plate, and clamping the sample block 5 through the pressure and rise plate 33 and the upper transverse frame of the support 31.

2. Grinding a first plane of the sample block 5;

3. loosening the pressure rising and reducing plate 33, taking out the sample block 5, cleaning the positioning groove, pasting the ground surface into the first positioning groove 35 and the third positioning groove 37, and re-clamping the sample block 5;

4. and adjusting the feeding assembly to enable the grinding wheel to be just contacted with the sample block 5, resetting to zero according to the ruler at the moment, starting the grinding head assembly, feeding through the feeding assembly, and grinding the second surface for the second time until the target size is reached.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may apply the above-mentioned technical details to other fields by using the equivalent embodiments with equivalent changes or modifications, but any simple modification and equivalent changes made to the above embodiments according to the technical spirit of the present invention may still fall within the protection scope of the technical solution of the present invention.

Claims

1. A multifunctional sample block grinding mechanism comprises a grinding head assembly (1) and a feeding assembly, and is characterized by further comprising a grinding support (2) and a positioning clamp (3);

the grinding support (2) is arranged on the feeding assembly and is positioned on one side of the grinding head assembly (1) where the grinding wheel is positioned;

the grinding support (2) comprises a bottom plate (21) and a support (22), the bottom plate (21) and the support (22) are connected through a rotary pin (23) and a screw (24), and the rotary pin (23) is located at the center of the support (22) in the width direction;

positioning fixture (3) location presss from both sides tight sample block (5), positioning fixture (3) detachably installs on support (22) of grinding support (2).

2. The multifunctional sample block grinding mechanism according to claim 1, wherein the support (22) comprises a horizontal plate (221) and a vertical plate (222), the horizontal plate (221) and the vertical plate (222) are vertically fixedly connected, the horizontal plate (221) is connected with the bottom plate (21), and the vertical plate (222) is connected with the positioning clamp (3).

3. The multifunctional sample block grinding mechanism according to claim 2, characterized in that the positioning fixture (3) comprises a bracket (31), a lifting screw rod (32) and a lifting pressing plate (33);

the bracket (31) is detachably connected with a vertical plate (222) of the support (22), and the bracket (31) is a vertically arranged rectangular frame structure;

the lifting screw rod (32) longitudinally penetrates through an upper transverse frame and a lower transverse frame of the bracket (31) and is connected with the upper transverse frame and the lower transverse frame through bearings, and a knob (39) is arranged at the upper end of the lifting screw rod (32);

the lifting and lowering plate (33) is in threaded fit with the lifting screw rod (32), the lifting and lowering plate (33) is in sliding connection with the two vertical frames of the support (31), and sliding grooves (34) matched with the two ends of the lifting and lowering plate (33) are formed in the two vertical frames of the support (31) respectively.

4. The multifunctional sample block grinding mechanism as claimed in claim 3, wherein a first positioning groove (35) is arranged at the lower end of the side vertical surface of the upper transverse frame of the support (31) far away from the vertical plate (222), a second positioning groove (36) is arranged at the upper end of the side vertical surface of the lower transverse frame of the support (31) far away from the vertical plate (222), a third positioning groove (37) is arranged at the upper end of the side vertical surface of the pressure rising and lowering plate (33) far away from the vertical plate (222), a fourth positioning groove (38) is arranged at the lower end of the side vertical surface of the pressure rising and lowering plate (33) far away from the vertical plate (222), the first positioning groove (35) and the third positioning groove (37) have the same groove depth, and the second positioning groove (36) and the fourth positioning groove (38) have the same groove depth.

5. A multifunctional sample block grinding mechanism according to claim 3, characterized by further comprising a clamp body (4), wherein the clamp body (4) is detachably mounted on the positioning clamp (3), and the clamp body (4) is positioned and clamped by the upper transverse frame or the lower transverse frame of the pressure raising and reducing plate (33) and the bracket (31).

6. The grinding mechanism of the multifunctional sample block as claimed in claim 5, wherein the clamp body (4) comprises a clamping part (41), an extension bar (42) and two spring plates (43);

the clamping part (41) and the extension bar (42) are integrally formed or fixedly connected, and the two elastic sheets (43) are symmetrically arranged on two sides of the extension bar (42);

a lug boss (44) is arranged on the side surface of the clamping part (41) far away from the extension bar (42);

a positioning boss (45) matched with the size of the sample block (5) is arranged on the end face, far away from the clamping part (41), of the extension bar (42);

the elastic sheet (43) comprises an installation adjusting part (431) and a clamping part (432), the clamping part (432) is formed by bending the elastic sheet (43), the installation adjusting part (431) is connected with the extension bar (42) through a screw (24), the clamping parts (432) of the two elastic sheets (43) are bent towards opposite directions, and the clamping parts (432) are positioned on one side, far away from the clamping part (41), of the extension bar (42).

7. The multifunctional sample block grinding mechanism according to claim 2, wherein two positioning pins (25) are further arranged between the bottom plate (21) and the horizontal plate (221) for positioning, a screw through hole (26) is arranged on the horizontal plate (221), and the screw through hole (26) is an arc groove with the center of the hole of the rotating pin (23) as a circle center.

8. The multifunctional sample block grinding mechanism according to claim 1, wherein the feeding assembly is connected with a digital display device through signals.

9. A method for grinding the arc surface of a sample block is characterized in that a multifunctional sample block grinding mechanism is used for carrying out the following steps:

embedding the cut sample block (5) into a positioning clamp (3) for positioning and clamping;

the position of the positioning fixture (3) is adjusted through the feeding assembly, so that the grinding wheel is just contacted with the sample block (5);

removing or loosening the screw (24) connecting the bottom plate (21) and the support (22) and only retaining the rotating pin (23);

and starting the grinding head assembly (1), manually controlling the positioning clamp (3) to rotate around the rotating pin (23), and grinding the arc surface with the preset diameter.

10. A method for grinding a sample arc surface according to claim 9,

the method comprises the following specific steps of embedding the cut sample block (5) into the positioning clamp (3) for positioning and clamping:

installing the sample block (5) on the clamp body (4), positioning the sample block (5) through a positioning boss (45) matched with the size of the sample block, and adjusting the elastic sheet (43) to clamp the sample block;

the fixture body (4) is arranged on the positioning fixture (3) and is positioned and clamped through the upper transverse frame or the lower transverse frame of the pressure rising and reducing plate (33) and the bracket (31).