CN209920600U

CN209920600U - Die for pressing piezoelectric patches

Info

Publication number: CN209920600U
Application number: CN201821418066.2U
Authority: CN
Inventors: 赵若红; 周新雨; 徐安; 傅继阳; 刘爱荣; 吴玖荣
Original assignee: Guangzhou University
Current assignee: Guangzhou University
Priority date: 2018-08-30
Filing date: 2018-08-30
Publication date: 2020-01-10
Anticipated expiration: 2028-08-30

Abstract

The utility model relates to the field of machining, a mould for suppressing piezoelectric patches is disclosed, it includes mould and bed die, upward be provided with two at least bosss on the surface of mould, the bed die be equipped with two at least cell bodies that are used for filling piezoelectric patches raw materials on the surface, and each boss and each the cell body one-to-one is at the in-process of suppressing piezoelectric patches, boss position fit in the cell body. This a mould for suppressing piezoelectric patch can improve suppression efficiency, reduce the film-making cost, be convenient for tear open the mould moreover.

Description

Die for pressing piezoelectric patches

Technical Field

The utility model relates to a machining field, concretely relates to a mould for suppressing piezoelectric patches.

Background

Press forming is a method of manufacturing a semi-finished product of a definite shape. The existing device for producing the model by the compression molding method is a pressure molding machine which is widely applied in laboratories, and the pressure molding machine is generally configured in the existing college laboratories for making materials. The pressing die only has one groove body for filling the raw materials of the piezoelectric sheets by production personnel, so that when the piezoelectric sheets are prepared, the existing die is pressed by using the existing pressure forming machine, only one piezoelectric sheet can be pressed at a time, the production period for producing the piezoelectric sheets is long, and the cost is high. In order to solve the problem, a multi-column forming machine is used in the market to complete pressing, wherein the multi-column forming machine can be a four-column forming machine, the four-column forming machine is provided with four pressing columns, can be matched with 4 pressing dies to be used for pressing four pressing sheets at a time, but the four-column forming machine is large in size and is not beneficial to placing instruments in a laboratory with limited space.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a mould for suppressing piezoelectric patches can improve the efficiency of suppression piezoelectric patches, and the cost is lower, need not to adopt the multicolumn type make-up machine moreover, practices thrift and places the space.

In order to achieve the above object, an embodiment of the utility model provides a mould for suppressing piezoelectric patches, including last mould and bed die, the last mould be provided with two at least bosss on the surface, the bed die be equipped with two at least cell bodies that are used for filling piezoelectric patches raw materials on the surface, and each the boss with each the cell body one-to-one, at the in-process of suppressing piezoelectric patches, boss position fit in the cell body.

Preferably, the groove body comprises a first convex part and a limiting ring, the limiting ring is detachably sleeved on the outer side of the first convex part, a first groove used for filling the raw materials of the piezoelectric sheet is formed between the limiting ring and the first convex part, and the boss is positioned in the first groove when the piezoelectric sheet is pressed.

Preferably, the limiting ring comprises two half rings which are buckled with each other, and each half ring is detachably connected to the outer side of the first convex part.

Preferably, the boss comprises a boss body corresponding to the first groove and a second groove surrounding the boss body, and when the boss body is positioned in the first groove, the limit ring is clamped in the second groove.

Preferably, the height of the retainer ring is equal to the depth of the second groove, and when the retainer ring is positioned in the second groove, the surface of the upper mold is in contact with the surface of the lower mold.

Preferably, the mould further comprises at least one positioning device, and the upper mould and the lower mould are connected through the positioning device.

Preferably, the positioning device includes a positioning portion and a limiting portion, the positioning portion is disposed on a side surface of the upper mold, the limiting portion is disposed on a side surface of the lower mold, and the positioning portion is inserted into the limiting portion in a process of pressing the piezoelectric sheet.

Preferably, the positioning portion is provided with a second convex portion, the limiting portion is provided with a limiting hole corresponding to the second convex portion, and the second convex portion extends out of the surface of the upper die and is positioned and inserted in the limiting hole.

Preferably, the positioning portions are evenly distributed along the circumferential direction of the upper die at equal intervals, and the limiting portions are evenly distributed along the circumferential direction of the lower die at equal intervals.

Preferably, the limiting part is a hollow pipe, and the positioning part is a positioning rod.

To sum up, the embodiment of the utility model provides a mould for suppressing piezoelectric patch has following advantage:

1. through setting up two at least bosss and cell bodies on upper and lower mould, make the press can once suppress more than two piezoelectric patches, improve work efficiency, reduce the suppression cost. And the common press can complete the pressing work without additionally purchasing a multi-column forming machine, such as a four-column forming machine and the like, so that the placing space of the machine can be saved.

2. Through first recess and boss body block, spacing ring and second recess block, behind the suppression piezoelectric patch, only need separately go up the bed die, dismantle into two semi-rings with the spacing ring, can take out the piezoelectric patch after the shaping, the form removal is simple.

Drawings

Fig. 1 is a perspective view of an upper mold according to a first embodiment of the present invention;

fig. 2 is a perspective view of a lower mold according to a first embodiment of the present invention;

fig. 3 is a perspective view of a mold ring according to a first embodiment of the present invention;

fig. 4 is a top view of a lower mold having six grooves according to a second embodiment of the present invention;

fig. 5 is a top view of a lower mold having nine grooves according to an embodiment of the present invention.

Reference numerals:

1. an upper die; 11. a boss; 111. a boss body; 112. a second groove; 12. a positioning part; 121. a second convex portion; 2. a lower die; 21. a trough body; 211. a first convex portion; 212. A limiting ring; 213. a first groove; 22. a limiting part; 221. and a limiting hole.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

Example one

As shown in fig. 1 to 3, the utility model provides a mould for suppressing piezoelectric patches, it includes mould 1 and bed die 2, the bed die 1 be provided with two at least bosss 11 on the surface, bed die 2 be equipped with two at least cell bodies 21 that are used for filling piezoelectric patches raw materials on the surface, and each boss 11 with each the cell body 21 one-to-one, at the in-process of suppressing piezoelectric patches, boss 11 location fit in the cell body 21. In the present embodiment, the number of the bosses 11 and the grooves 21 is three as an example.

Based on the technical scheme, the number of the pressing sheets which can be manufactured at one time is increased by the mutual matching of the three bosses 11 on the upper die 1 and the three groove bodies 21 on the lower die 2, a multi-column forming machine is not required to be specially purchased, pressing can be completed only by a press, and the pressing cost is reduced. And the upper limit of the number of the pressed piezoelectric sheets depends on the maximum pressure value of a press in a laboratory, the whole pressing production process can reduce the labor intensity of experimenters, and the time for manufacturing the pressed sheets. In a working state, the boss 11 is positioned on the lower surface of the upper die 1, the groove 21 is positioned on the upper surface of the lower die 2, when the piezoelectric ceramic composite piezoelectric ceramic composite material is used, the lower die 2 is firstly placed on a pressure platform of a press, then a prepared piezoelectric ceramic piezoelectric.

The groove body 21 includes a first protrusion 211 and a limiting ring 212, the limiting ring 212 is detachably sleeved outside the first protrusion 211, a first groove 213 for filling the piezoelectric sheet raw material is formed between the limiting ring 212 and the first protrusion 211, and when the piezoelectric sheet is pressed, the boss 11 is positioned in the first groove 211. After the piezoelectric sheet is formed, the piezoelectric sheet is left in the first groove 213, and the limiting ring 212 sleeved on the outer side of the first protrusion 211 can be taken out by separating the upper die 1 and the lower die 2, so that the die removal can be completed. The problem that the piezoelectric sheet is too thin after being formed and is left in the groove body 21 to be taken out conveniently is solved. Further, the limiting ring 212 includes two half rings fastened to each other, and each half ring is detachably connected to the outer side of the first protrusion 211. When the die is disassembled, the piezoelectric sheet can be taken out only by disassembling the first limiting ring 212 into the second limiting ring after the upper die 1 and the lower die 2 are separated, so that the operation is simple, and the die is convenient to disassemble.

In addition, the boss 11 includes a boss body 111 corresponding to the first groove 213 and a second groove 112 surrounding the boss body 111, and when the boss body 111 is positioned in the first groove 211, the limit ring 212 is clamped in the second groove 112. The second groove 112 matched with the limit ring 212 in a positioning manner is arranged, so that the boss 11 and the groove body 21 can be clamped more tightly in a pressing process, and the piezoelectric sheets are uniformly pressed. The height of the limiting ring 212 is equal to the depth of the second groove 112, and when the limiting ring 212 is positioned in the second groove 112, the surface of the upper die 1 contacts with the surface of the lower die 2, that is, the height of the first protrusion 211 is equal to the depth of the first groove 213, so that the upper die 1 and the lower die 2 can be tightly attached in the pressing process, and the situation that the quality of a finished product is deviated due to different pressures applied to each piezoelectric sheet caused by incomplete attaching is prevented.

When the die is used, the lower die 2 is firstly placed on a compression platform of a press machine, and the boss bodies 111 are respectively sleeved with a limiting ring 212. Then, a pre-prepared piezoelectric sheet raw material in a fluid state is injected into a first groove 213 formed between the limiting ring 212 and the first protrusion 211 through an injector, and then the upper die 1 is correspondingly placed above the lower die 2, so that the second groove 112 of the upper die 1 is matched with the limiting ring 212 of the lower die 2, and the boss body 111 is matched with the first groove 213. Finally, the upper die 1 is pressed by the pressing column of the press, and a finished piezoelectric sheet is formed in the first groove 213. After pressing, the upper mold 1 is taken out, and the limit ring 212 is split into two half rings, so that the formed piezoelectric plate can be taken out from the first convex part 211.

The mould for pressing the piezoelectric patches further comprises at least one positioning device, the upper mould 1 is connected with the lower mould 2 through the positioning device, and the positioning device can ensure that the upper mould 1 and the lower mould 2 are matched without errors. According to the principle that three points are not on the same straight line and only one plane is available, in the embodiment, the number of the positioning devices is preferably three, so that the boss 11 of the upper die 1 can be directly and effectively aligned with the groove body 21 of the lower die 2, the piezoelectric sheet material in the groove body 21 is uniformly pressed, and the quality of a finished piezoelectric sheet product is ensured. The positioning device comprises a positioning part 12 and a limiting part 22, the positioning part 12 is arranged on the side surface of the upper die 1, the limiting part 22 is arranged on the side surface of the lower die 2, in the process of pressing the piezoelectric sheet, the positioning part 12 is inserted into the limiting part 22, the upper end surface of the positioning part 12 is completely attached to the lower end surface of the limiting part 22, the upper die 1 and the lower die 2 are connected and fastened, and the boss body 111 is completely positioned and clamped in the first groove 213. The positioning portion 12 is provided with a second protrusion 121, the limiting portion 22 is provided with a limiting hole 221 corresponding to the second protrusion 121, and the second protrusion 121 is positioned and inserted in the limiting hole 221. The upper die 1 and the lower die 2 are convenient to match. In this embodiment, the axis of the positioning portion 12 coincides with the axis of the second protrusion 121, and the shape of the positioning portion 12 coincides with the shape of the second protrusion 121, so that the second protrusion 121 can be accurately engaged with the stopper hole 221, and the boss 11 and the groove 21 are aligned. The second protrusion 121 protrudes from the surface of the upper mold 1, so that it can be directly inserted into the stopper hole 221 without being blocked. In practical application, the upper end of the limiting portion 22 may also extend out of the upper surface of the lower mold 2, so that the second protrusion 121 can be inserted into the limiting portion to realize the clamping.

Each location portion 12 is along the equidistant evenly distributed of circumference of last mould 1, the equidistant evenly distributed of circumference of lower mould 2 is followed to each spacing portion 22, can guarantee that the press application of force makes mould 1 when being close to mould 2 down, each spacing portion 22 department can the even atress, further make mould 1 atress on the surface more even, when the lower surface of avoiding going up mould 1 is laminating with the upper surface of lower mould 2, the atress has partial deviation and leads to the problem of poor stability appearing, guarantee to fix a position accurately between boss 11 and the cell body 21, prevent that partial boss 11 and cell body 21 from aiming at completely and leading to the piezoelectric patches thickness inequality, the not good problem of quality. In the present embodiment, the positioning portion 12 and the second protruding portion 121 are both cylindrical and are integrally formed positioning rods, and correspondingly, the stopper portion 22 is a hollow tube, so that the positioning portion 12 and the stopper portion 22 can be accurately positioned when the upper die 1 and the lower die 2 are engaged.

In the present embodiment, the upper die 1 has three bosses 11 evenly distributed on the surface of the upper die 1 at equal intervals in the circumferential direction thereof. Each piezoelectric sheet is guaranteed to be subjected to the same pressure while sufficiently utilizing the limited space of the upper die 1 and the lower die 2.

It should be noted that in this embodiment, the material used for the upper mold 1 and the lower mold 2 may be 316 stainless steel, which has the capability of resisting pressure and environmental corrosion, and prevents the molds from being damaged in the laboratory due to air moisture or inadvertent corrosive substances. In the actual production process, other materials with higher pressure resistance and corrosion resistance, such as 304 stainless steel, can also be adopted for the upper die 1 and the lower die 2.

In the present embodiment, the cross-sectional shapes of the surface of the upper die 1, the surface of the lower die 2, the boss 11 of the upper die 1, the boss body 111, and the first protrusion 211 of the lower die 2 are all circular, and the cross-sectional shapes of the second groove 112 and the retainer ring 212 are circular rings.

The dimensions of the die for pressing a gasket of the present embodiment are designed as follows: the diameter ranges of the upper die 1 and the lower die 2 are both 50 mm-55 mm. The width of the second groove is 2mm, the depth is 3mm, the diameter of the boss body 111 is 10mm, the height is 2.2mm, the distance range between two adjacent bosses 11 is 1 mm-3 mm, and the distance range between the boss 11 and the edge of the upper die is 1 mm-3 mm. The diameter of the first projection 21 is 10mm, and the first projection 21 is 2mm higher than the surface of the lower mold 2. The stop collar 212 has a collar outer diameter of 14mm and a collar inner diameter of 11 mm. The second protrusion 121 is 1.2mm higher than the surface of the upper mold 1. The diameter of the positioning rod is 2 mm.

Example two

As shown in fig. 4 and 5, the present embodiment is different from the first embodiment in that: the upper mold 1 of the present embodiment is provided with six or nine bosses 11 on the surface, and it should be noted that, considering that the piezoelectric sheet of the present embodiment is one of the experimental materials, the number of the bosses 11 is increased by three in the experiment because the average value is often taken according to the error value of the experimental data. The six or nine bosses 11 are arranged in the form of: one of the bosses is arranged at the center of the surface of the upper die 1, the center of the circular boss 11 coincides with the center of the surface of the cylindrical upper die 1, the center of the boss is used as a reference point, and the other bosses are distributed at equal intervals on the circumference which takes the reference point as the center, so that the piezoelectric sheets are stressed uniformly during pressing.

Except for the above differences, other structures of the present embodiment are the same as those of the first embodiment, and corresponding effects and principles are also the same, which are not described herein again.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A mould for pressing a piezoelectric sheet is characterized in that: the piezoelectric piece pressing die comprises an upper die and a lower die, wherein at least two bosses are arranged on the surface of the upper die, at least two groove bodies used for filling piezoelectric piece raw materials are arranged on the surface of the lower die, the bosses are in one-to-one correspondence with the groove bodies, and the bosses are in positioning fit with the groove bodies in the piezoelectric piece pressing process.

2. A mold for pressing a piezoelectric sheet as claimed in claim 1, wherein: the cell body includes first convex part and spacing ring, spacing ring detachably cover is located the outside of first convex part, just the spacing ring with be formed with the first recess that is used for filling piezoelectric patch raw materials between the first convex part, during the suppression piezoelectric patch, the boss location set up in the first recess.

3. A mold for pressing a piezoelectric sheet as claimed in claim 2, wherein: the limiting ring comprises two semi-rings which are mutually buckled, and the semi-rings are respectively detachably connected to the outer sides of the first convex parts.

4. A mold for pressing a piezoelectric sheet as claimed in claim 2, wherein: the boss comprises a boss body corresponding to the first groove and a second groove surrounding the outer side of the boss body, and when the boss body is positioned in the first groove, the limiting ring is clamped in the second groove.

5. A die for pressing a piezoelectric sheet as claimed in claim 4, wherein: the height of the limiting ring is equal to the depth of the second groove, and when the limiting ring is positioned in the second groove, the surface of the upper die is in contact with the surface of the lower die.

6. A mould for compressing a piezoelectric sheet as claimed in any one of claims 1 to 5, wherein: the mould also comprises at least one positioning device, and the upper mould and the lower mould are connected through the positioning device.

7. A die for pressing a piezoelectric sheet as claimed in claim 6, wherein: the positioning device comprises a positioning part and a limiting part, the positioning part is arranged on the side face of the upper die, the limiting part is arranged on the side face of the lower die, and the positioning part is inserted into the limiting part in the process of pressing the piezoelectric patches.

8. A mold for pressing a piezoelectric sheet as claimed in claim 7, wherein: the positioning part is provided with a second convex part, the limiting part is provided with a limiting hole corresponding to the second convex part, and the second convex part extends out of the surface of the upper die and is positioned and inserted in the limiting hole.

9. A mold for pressing a piezoelectric sheet as claimed in claim 7, wherein: the positioning parts are evenly distributed along the circumferential direction of the upper die at equal intervals, and the limiting parts are evenly distributed along the circumferential direction of the lower die at equal intervals.

10. A mold for pressing a piezoelectric sheet as claimed in claim 7, wherein: the limiting part is a hollow pipe, and the positioning part is a positioning rod.