CN119757427A - A hydraulic punching machine and method for preparing transmission electron microscopy samples - Google Patents
A hydraulic punching machine and method for preparing transmission electron microscopy samples Download PDFInfo
- Publication number
- CN119757427A CN119757427A CN202510260038.0A CN202510260038A CN119757427A CN 119757427 A CN119757427 A CN 119757427A CN 202510260038 A CN202510260038 A CN 202510260038A CN 119757427 A CN119757427 A CN 119757427A
- Authority
- CN
- China
- Prior art keywords
- die
- blank holder
- face
- holder
- sliding seat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
本发明公开了一种制备透射电子显微样品的液压冲样机及方法。顶盖设置在底座上方，滑座设置在顶盖和底座之间，顶盖和底座之间通过立柱连接，滑座通过滑座导套可上下移动地连接在立柱上，液压千斤顶安装在顶盖和滑座之间，用于驱动滑座上下移动，上凸模单元和下凹模单元分别固定连接在滑座和底座上，上凸模单元和下凹模单元之间可上下移动地连接，待冲压金属板料放置在下凹模单元上，通过上凸模单元和下凹模单元之间的相对移动实现对待冲压金属板料的精准定位冲压。本发明通过液压千斤顶实现省力冲裁，通过定位销提高材料利用率并增加样品产量，通过设置自动卸料以及复位弹簧，减少了人工干预，提升了生产效率和操作便利性，保护设备正常运行。
The present invention discloses a hydraulic punching machine and method for preparing transmission electron microscopy samples. A top cover is arranged above a base, a slide is arranged between the top cover and the base, the top cover and the base are connected by a column, the slide is connected to the column by a slide guide sleeve and can be moved up and down, a hydraulic jack is installed between the top cover and the slide, and is used to drive the slide to move up and down, an upper punch unit and a lower die unit are fixedly connected to the slide and the base respectively, and the upper punch unit and the lower die unit are connected to be moved up and down, and a metal sheet to be punched is placed on the lower die unit, and accurate positioning and punching of the metal sheet to be punched is achieved through relative movement between the upper punch unit and the lower die unit. The present invention realizes labor-saving punching through a hydraulic jack, improves material utilization and increases sample output through a positioning pin, reduces manual intervention by setting automatic unloading and a reset spring, improves production efficiency and operation convenience, and protects the normal operation of the equipment.
Description
Technical Field
The invention belongs to the technical field of sample preparation equipment, and particularly relates to a hydraulic punching machine and a method for preparing a transmission electron microscopic sample.
Background
In modern industrial production and material science research, transmission Electron Microscopy (TEM) plays a critical role, and strict requirements are placed on sample preparation, which must be in the form of a disc with a standard diameter of 3mm and a thickness of between 10um and 100um before thinning, and requires smooth edges and no burrs. The rationality and the advancement of the structure of the sample punching equipment directly influence the quality and the precision of punched parts, thereby influencing the reliability of experimental results and simultaneously influencing the sample preparation efficiency and the safety and the convenience of operation.
The existing transmission electron microscope metal sample sheet punching device mainly comprises a vertical type sheet punching device and a horizontal type sheet punching device, wherein the sheet punching device shears a metal sheet through shearing force generated between a movable pressure head and a fixed punching opening, however, the existing transmission device still has the defects that a transmission mode is mainly manual, high-strength and high-wear-resistance materials are difficult to slice, sample preparation efficiency is affected, the device structure is open pressure transmission, a die lacks a guide mechanism, dynamic precision is low, sample precision and surface quality are affected, the sample lacks a positioning mechanism, punching positions are unreasonably distributed, material utilization rate is reduced, sample output quantity is small, the sample lacks a reasonable edge pressing mechanism, samples and metal sheets are wrinkled after punching is caused, the operation efficiency of the device is low, and manual unloading, manual sampling and manual resetting are needed after punching is finished.
Disclosure of Invention
In order to solve the problems in the background art, the invention aims to provide a hydraulic sample punching machine and a method for preparing a transmission electron microscopic sample, so as to solve the problems of low sample punching operation efficiency, poor sample preparation precision and the like in the prior art.
The invention adopts the technical scheme that:
1. A hydraulic press for preparing a transmission electron microscopic sample:
the stamping device comprises a base, a sliding seat, a stand column, a top cover, a hydraulic jack, an upper male die unit and a lower female die unit, wherein the top cover and the base are respectively and fixedly connected to the upper end and the lower end of the stand column, the sliding seat is positioned between the base and the top cover, the sliding seat is connected to the stand column in an up-down movable mode, the hydraulic jack is arranged between the top cover and the sliding seat, the upper male die unit and the lower female die unit are respectively and fixedly connected to the sliding seat and the base, a metal plate to be stamped is placed on the lower female die unit, and accurate positioning stamping of the metal plate to be stamped is realized through relative movement between the upper male die unit and the lower female die unit.
The upper male die unit comprises an upper die holder, an annular upper die cushion block, an annular blank holder limiting plate, a blank holder spring, a blank holder insert, a male die, a ball guide sleeve, a male die cushion block and a male die fixing sleeve;
The upper surface of the upper die holder is fixedly connected to the lower surface of the sliding seat, the upper surface of the upper die cushion block is fixedly connected to the lower surface of the upper die holder, the upper surface of the blank holder limiting plate is fixedly connected to the lower surface of the upper die cushion block, the blank holder is arranged in the middle of the blank holder limiting plate, the blank holder embedding block is fixedly arranged on the inner periphery of the blank holder, the upper die holder, the blank holder limiting plate and the middle of the blank holder embedding block are respectively provided with a first through hole, the male die cushion block is arranged at the first through hole of the upper die holder, the top of the male die cushion block is fixedly connected with the lower surface of the sliding seat, the upper part and the lower part of the male die fixing sleeve are respectively arranged at the first through holes of the upper die holder and the blank holder limiting plate, the male die is fixedly arranged at the inner periphery of the male die fixing sleeve, the top of the male die is fixedly connected with the lower surface of the male die cushion block, the ball guide sleeve is fixedly arranged at the position of the first through hole of the blank holder embedding block, the lower part of the male die is penetrated through the first through hole in the middle of the blank holder, the middle of the blank holder is provided with a blank spring, and the upper and lower ends of the two ends of the blank spring are respectively connected with the upper surface of the upper die holder and the lower surface of the blank holder and the blank holder is reset.
The lower die unit comprises a lower die holder, an annular die fixing plate, a die, a thimble spring, a thimble, a locating pin and a locating pin spring, wherein the lower surface of the lower die holder is fixedly connected to the upper surface of the base, the lower surface of the die fixing plate is fixedly connected to the upper surface of the lower die holder, the die is arranged in the middle of the die fixing plate, the middle of the die is provided with a second through hole, the thimble is arranged at the second through hole position in the middle of the die in a vertically movable manner, the bottom end of the thimble is connected with the lower die holder through the thimble spring, the top of the die is provided with a blind hole, the blind hole at the top of the die is internally provided with the locating pin spring and the locating pin spring, and the upper end and the lower end of the locating pin spring are respectively connected with the bottom of the locating pin and the inner bottom surface of the blind hole of the die.
The hydraulic press machine further comprises a supporting spring, a limiting sleeve and a limiting sleeve gasket, wherein the supporting spring is wound around the periphery of the two upright posts in the hydraulic press machine, the upper end and the lower end of the supporting spring are respectively connected with the lower end face of the sliding seat and the upper end face of the base, the supporting spring is used for resetting the sliding seat, the limiting sleeve is sleeved on the periphery of the other two upright posts, the lower end face of the limiting sleeve is connected with the upper end face of the base, the limiting sleeve gasket is arranged on the upper end face of the limiting sleeve, and the limiting sleeve is used for limiting the bottom dead center position of the sliding seat.
The lower end face of the inner side of the blank holder limiting plate is in a step shape, the upper end face of the outer side of the blank holder is in a step shape, and the lower end face of the step shape in the blank holder limiting plate is matched with the upper end face of the step shape in the blank holder, so that the blank holder can be installed on the inner side of the blank holder limiting plate in a vertically movable manner, and meanwhile the blank holder limiting plate limits the moving stroke of the blank holder.
The punch in the upper punch unit and the thimble in the lower die unit are coaxially arranged, the metal plate to be punched is placed between the punch and the thimble, and accurate positioning punching of the metal plate to be punched is achieved through the punch, the locating pin and the thimble.
The upper die holder in the upper punch unit is connected with a die guide sleeve, the lower die holder in the lower die unit is connected with a die guide post, and the die guide sleeve is arranged on the upper part of the die guide post in a manner of moving up and down along the die guide post.
The bottom end of the hydraulic jack is fixedly connected to the sliding seat, the top end of a piston rod of the hydraulic jack is in contact with the lower surface of the top cover, and the hydraulic jack is used for driving the sliding seat to move up and down.
The lower end face of the blank holder is flush with the lower end face of the blank holder embedded block and lower than the lower end face of the male die, the lower end face of the male die is lower than the lower end face of the blank holder limiting plate, the upper end face of the female die is flush with the upper end face of the ejector pin, and the upper end face of the positioning pin is higher than the upper end face of the ejector pin.
2. A method for preparing a transmission electron microscopic sample, comprising the steps of:
S1, horizontally placing a metal plate to be stamped on the upper end surface of a female die in a lower female die unit, and moving the metal plate to be stamped to enable the edge of the metal plate to be tangential to the outer diameter of a locating pin in the lower female die unit;
S2, controlling a piston rod of a hydraulic jack to move upwards so as to push a sliding seat to move downwards, enabling the lower end face of an embedded block of a blank holder to be in contact with a metal plate to be punched and apply blank pressing force, enabling the sliding seat to move downwards continuously, enabling a male die to be in contact with the metal plate and be matched with a female die to generate shearing force so as to punch out a sample, enabling the rest of the metal plate to be clamped at the lower end of the male die, enabling the male die to push the sample into the female die, enabling the sample to push a thimble to move downwards, enabling the thimble spring to compress, and completing punching;
And S3, a piston rod of the hydraulic jack moves downwards, and the supporting spring pushes the sliding seat to move upwards, so that the rest part of the metal plate clamped on the male die is pushed out, and automatic discharging is completed.
The cutting edge of the female die adopts a fillet structure, and the spring at the lower end of the ejector pin is always in a compression state, so that the tensile stress of a to-be-cut area of a blanking part of a metal plate is eliminated, the metal plate is in a three-dimensional compression stress state and is blanked in a pure shearing mode, the edge of a sample is smooth and burr-free, and the surface of the sample is smooth under the extrusion of the male die and the ejector pin. The method ensures that in the subsequent experiments, the thin sample area is prepared by using an electrolysis double-spray method, the electrolyte evenly corrodes the center of the sample and forms holes, and then microscopic features of the thin area around the holes are observed under a transmission electron microscope. The sample with burrs or uneven surfaces is easy to form a plurality of small holes or eccentric holes after electrolysis double spraying, so that a sample thin area cannot be obtained, further, the sample cannot be observed under a transmission electron microscope, sample waste is caused, and the experiment fails.
According to the invention, the upper die cushion block is arranged by combining the limiting sleeve and the limiting gasket, and the limiting gasket and the upper die cushion block are made of polyurethane rubber, so that flexible limiting buffer is provided. In addition, when the slide moves to the bottom dead center position, the spraying mark is used as a warning prompt at the intersection of the upper end face of the slide and the upright post, so that excessive downward movement is avoided when manual operation is lost, the upper die and the lower die are rigidly collided, and the service life of equipment is influenced.
According to the invention, the positioning pins are reasonably arranged, so that the positions of the metal plate to be punched are limited, and the positions selected on the metal plate are uniformly distributed and have proper intervals when a plurality of samples are punched, so that more samples are prepared, the material utilization rate is improved, and the positioning pins are combined with the positioning pin springs, so that rigid interference with equipment can be avoided.
The invention adopts a closed structure and is provided with an accurate guide mechanism, the upright post and the guide sleeve are matched to guide the sliding seat to move, and the die guide post and the die guide sleeve are used for accurately guiding the male die to accurately punch. The blank holder and the blank holder spring are reasonably arranged, so that the blank holder contacts the metal plate to be punched before the male die, and therefore proper blank holder force is provided, the blank holder insert is provided with the gear ring and the blank holder spring to be matched, the vertical flow of materials is limited, the blank holder effect is further guaranteed, and wrinkling of the metal plate during blanking is prevented. Otherwise, once the metal plate is wrinkled, the subsequent sample additionally generates larger plastic deformation, and when the dislocation configuration in the sample is observed under a transmission electron microscope, the intrinsic dislocation of the sample is difficult to distinguish from the interference dislocation introduced by the wrinkling, so that the reliability of an experimental result is influenced.
The beneficial effects of the invention are as follows:
1. According to the hydraulic blanking device, a hydraulic blanking technology is adopted, a strength check design structure is adopted, a small jack is selected to reduce the volume of equipment, and compared with traditional manual blanking, the hydraulic blanking device can be used for blanking high-strength wear-resistant materials more labor-effectively, and blanking efficiency and safety are improved.
2. According to the invention, the positioning pins are reasonably arranged, so that the positions of the metal plate to be punched are limited, and the positions selected on the metal plate are uniformly distributed and have proper intervals when a plurality of samples are punched, so that more samples are prepared, the material utilization rate is improved, and the positioning pins are combined with the positioning pin springs, so that rigid interference with equipment can be avoided.
3. The male die provided by the invention adopts the male die fixing sleeve, is easy to replace, and utilizes the ball guide sleeve to guide the edge pressing ring to accurately move, so that the direct friction between the inner hole of the edge pressing ring and the male die is reduced, the rigidity of the male die is ensured, and the service life of the male die is prolonged. The gear ring structure and the inner hole structure of the blank holder are easy to wear, and the insert is adopted, so that the replacement is convenient. The cutting edge of the female die is easy to wear, is designed separately from the die fixing plate, and is convenient to replace.
4. After blanking is finished, the blank holder structure can finish the action of automatically discharging the metal plate, and the thimble structure can finish the action of automatically ejecting the sample, so that manual operation is reduced, and the production efficiency and the operation convenience are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments will be briefly described below.
FIG. 1 is a three-dimensional view of a hydraulic press according to the present invention after reset;
FIG. 2 is a right side view of the hydraulic press according to the present invention after reset;
FIG. 3 is a cross-sectional view of the hydraulic press according to the present invention after reset;
FIG. 4 is a right side view of the hydraulic press machine of the present invention after the completion of the punching operation;
FIG. 5 is a cross-sectional view of the hydraulic press of the present invention after completion of the punching operation;
FIG. 6is a first cross-sectional view of the hydraulic press of the present invention after reset;
FIG. 7 is a second cross-sectional view of the hydraulic press of the present invention after reset;
fig. 8 is a third cross-sectional view of the hydraulic press according to the present invention after reset.
In the figure, a base-1, a limit sleeve-2, a limit sleeve gasket-3, a slide seat-4, a stand column-5, a top cover-6, a hydraulic jack-7, a supporting spring-8, an upper die holder-9, an upper die pad-10, a blank holder limit plate-11, a blank holder-12, a blank holder spring-13, a blank holder insert-14, a male die-15, a ball guide sleeve-16, a lower die holder-17, a female die fixing plate-18, a female die-19, a thimble spring-20, a thimble-21, a locating pin-22, a die guide post-23, a die guide sleeve-24, a spring cushion block-25, a locating pin spring-26, a male die cushion block-27, a male die fixing sleeve-28 and a slide seat guide sleeve-29 are arranged.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The hydraulic press comprises a base 1, a sliding seat 4, a vertical column 5, a top cover 6, a hydraulic jack 7, an upper male die unit and a lower female die unit, wherein the top cover 6 and the base 1 are respectively and fixedly connected to the upper end and the lower end of the vertical column 5, the sliding seat 4 is positioned between the base 1 and the top cover 6, the sliding seat 4 is connected to the vertical column 5 in a vertically movable mode, the hydraulic jack 7 is arranged between the top cover 6 and the sliding seat 4, the upper male die unit and the lower female die unit are respectively and fixedly connected to the sliding seat 4 and the base 1, a metal plate to be pressed is placed on the lower female die unit, and accurate positioning and pressing of the metal plate to be pressed are realized through relative movement between the upper male die unit and the lower female die unit.
As shown in fig. 2, the base 1, the slide 4 and the top cover 6 are arranged in parallel at intervals. The bottom of stand 5 and the counter bore fixed connection that base 1 periphery was seted up, and the unthreaded hole is seted up to the periphery of top cap 6, and the aperture of top cap 6 unthreaded hole is less than the plain noodles diameter of stand 5, and is greater than the screw thread face diameter of stand 5, and top cap 6 passes through nut and stand 5 top fixed connection in unthreaded hole position department, and as shown in fig. 6, slide 4 passes through slide guide pin bushing 29 along stand 5 up-and-down motion to guarantee slide 4 up-and-down motion's precision improves the surface quality of sample. The lower extreme of hydraulic jack 7 passes through hexagon socket head cap bolt with slide 4 upper end fixed, and hydraulic jack 7 piston rod upper end contact top cap 6 lower surface, and hydraulic jack 7 piston rod up-and-down motion drives slide 4 and reciprocates to provide great blanking force, and can manual afterburning one by one, make the blanking more steady, thereby more light high-efficient blanking high strength wear-resisting material.
As shown in fig. 4, the supporting springs 8 are in a compressed state in the whole process and are diagonally distributed, sleeved on the two diagonally distributed upright posts 5, only two supporting springs 8 are used for providing proper supporting force, blanking force is reduced, equipment is convenient to reset after blanking is finished, the lower ends of the supporting springs 8 are connected with the upper end face of the base 1, the upper ends of the supporting springs 8 are connected with the lower end face of the sliding seat 4, the supporting springs 8 move along with the sliding seat 4 in an up-and-down movement manner, after blanking is finished, the pressure reducing valve of the hydraulic jack 7 is opened, the sliding seat 4 automatically resets under the thrust of the supporting springs 8, and the blanking efficiency is improved.
As shown in fig. 3, the upper punch unit comprises an upper die holder 9, an annular upper die cushion block 10, an annular blank holder limiting plate 11, a blank holder 12, a blank holder spring 13, a blank holder insert 14, a punch 15, a ball guide sleeve 16, a punch cushion block 27 and a punch fixing sleeve 28;
The upper surface of the upper die holder 9 is fixedly connected with the lower surface of the sliding seat 4, the upper die cushion block 10 is positioned between the upper die holder 9 and the blank holder limiting plate 11, the upper surface of the upper die cushion block 10 is fixedly connected with the lower surface of the upper die holder 9, the upper surface of the blank holder limiting plate 11 is fixedly connected with the lower surface of the upper die cushion block 10, the blank holder 12 is arranged in the middle of the blank holder limiting plate 11 in a vertically movable way, the blank holder insert 14 is fixedly arranged at the inner periphery of the blank holder 12, the ball guide sleeve 16 is arranged in the middle of the blank holder insert 14, the punch fixing sleeve 28, the blank holder 12, the upper die holder 9, the blank holder limiting plate 11 and the middle of the blank holder insert 14 are provided with first through holes, the punch cushion block 27 is arranged at the first through holes of the upper die holder 9, the top of the punch cushion block 27 is fixedly connected with the lower surface of the sliding seat 4, the upper portion and the lower part of punch fixed sleeve 28 set up respectively at the first through-hole at upper die holder 9 and blank holder limiting plate 11, punch 15 fixed mounting is in punch fixed sleeve 28's inner periphery, punch 15's top and punch pad 27 lower surface fixed connection, ball guide 16 fixed mounting is in blank holder slug 14's first through-hole position department, punch 15's lower part is movably set up in ball guide 16's middle part after penetrating the first through-hole at blank holder limiting plate 11 middle part, punch 15's periphery at middle part is provided with blank holder spring 13, blank holder spring 13 is located the first through-hole at blank holder limiting plate 11 middle part department, and blank holder spring 13's upper and lower both ends are connected with the lower surface of upper die holder 9 and the top of blank holder 12 respectively, blank holder spring 13 is used for providing blank holder force and makes blank holder 12's reset, blank holder slug 14 lower part is provided with the ring gear for increasing the blank holder force.
The upper die holder 9 is fixed on the lower end face of the sliding seat 4 through an inner hexagon bolt, and the blank holder limiting plate 11 is fixed on the lower end face of the upper die cushion block 10 through an inner hexagon bolt and fixes the upper die cushion block 10 on the lower end face of the upper die holder 9. The punch 15 is arranged in a first through hole in the middle of the upper die holder 9, the punch cushion block 27 is arranged at the top of the punch 15 and limits the up-and-down movement of the punch 15 together with the punch fixing sleeve 28, the outer diameter of the upper end of the blank holder 12 is slightly smaller than the inner diameter of the blank holder limiting plate 11, so that the blank holder 12 can smoothly move up and down, the lower end of the blank holder spring 13 is contacted with the bottom surface of a blind hole at the upper end of the blank holder 12, the upper end of the blank holder spring 13 is contacted with the upper die holder 9, the blank holder spring 13 is always in a compressed state, the blank holder and the punch are convenient to discharge, in an initial state, the lower end face of the blank holder 12 and the blank holder embedding block 14 are flush and lower than the lower end face of the punch 15, and the lower end face of the punch 15 is lower than the lower end face of the blank holder limiting plate 11, so that the blank holder 12 is smoothly ensured to be contacted with the metal plate to be punched, and the blank holder 15 is contacted with the metal plate to be punched, and then the blank holder 15 is contacted with the metal plate to be punched.
The outer diameter of the lower end of the blank holder insert 14 is in interference fit with the inner diameter of the first through hole of the blank holder 12, and the blank holder insert 14 is tangent with the outer diameter of the male die 15 through the ball guide sleeve 16, so that the blank holder insert 14 and the male die 15 are prevented from directly generating radial collision, and the rigidity and the service life of the male die 15 are improved by being matched with the male die fixing sleeve 28. The service life of the male die 15 is guaranteed, and the male die fixing sleeve 28 with the top in a step-shaped design can limit the upward continuous movement of the blank holder 12 so as to limit the movement stroke of the blank holder 12.
As shown in fig. 5, the lower die unit comprises a lower die holder 17, an annular die fixing plate 18, a die 19, a thimble spring 20, a thimble 21, a positioning pin 22 and a positioning pin spring 26, wherein the lower surface of the lower die holder 17 is fixedly connected to the upper surface of the base 1, the lower surface of the die fixing plate 18 is fixedly connected to the upper surface of the lower die holder 17, the die 19 is arranged in the middle of the die fixing plate 18, the middle of the die 19 is provided with a second through hole, the thimble 21 is arranged at the second through hole in the middle of the die 19 in a vertically movable manner, the bottom end of the thimble 21 is connected with the lower die holder 17 through the thimble spring 20, a blind hole is formed in the top of the die 19, the positioning pin spring 26 and the positioning pin 22 are arranged in the blind hole in the top of the die 19, and the upper end and the lower end of the positioning pin spring 26 are respectively connected with the bottom of the positioning pin 22 and the inner bottom surface of the blind hole of the die 19.
The lower die holder 17 is fixed on the upper end face of the base 1 through an inner hexagon bolt, and the female die 19 is fixed on the upper end face of the base 1 through a counter bore by the female die fixing plate 18. The outer diameter of the upper end of the thimble 21 is slightly smaller than that of the second through hole of the female die 19, the thimble 21 can conveniently move up and down, the top end of the thimble spring 20 is connected with the thimble 21, the bottom end of the thimble spring 20 is connected with the upper surface of the lower die holder 17 through a spring cushion block 25, the thimble spring 20 is always in a compressed state, the upper end of the thimble spring 20 is contacted with the lower end face of the thimble 21, and the lower end of the thimble spring 20 is contacted with the spring cushion block 25, so that a sample clamped at the inner diameter of the male die 15 is ejected out, and subsequent sampling is facilitated.
The lower end of the locating pin 22 is contacted with the bottom of a blind hole at the upper end of the female die 19 through a locating pin spring 26, rigid collision between the locating pin 22 and the blank holder 12 is avoided, the edge of a metal plate to be punched is tangential to the locating pin 22 during sample punching, so that the reasonable and accurate blanking position is ensured, the material utilization rate is improved, the sample preparation quantity is increased, the lower die holder 17 is fixed with the die guide post 23 through a counter bore, the upper die holder 9 is fixed with the die guide sleeve 24, the die guide post 23 and the die guide sleeve 24 can move relatively, the upper die holder 9 moves up and down along the die guide post 23 through the die guide sleeve 24, the slide guide sleeve 29 is combined with the directional movement of the upright post 5, the sample punching precision is ensured, and the sample has no flash and burrs.
As shown in fig. 7, the base 1 is provided with a threaded hole and is connected with a counter bore of the lower die holder 17 through an inner hexagon bolt. The top cover 6 is provided with a unthreaded hole for ensuring that the upright post 5 passes smoothly and is fixed through a nut. The slide 4 is provided with a threaded hole and is connected with a counter bore of the blank holder limiting plate 11 through an inner hexagon bolt, and the slide 4 is provided with a counter bore and is connected with a threaded hole of the upper die holder 9 through an inner hexagon bolt. The hydraulic jack 7 is connected with the threaded hole of the sliding seat 4 through an inner hexagon bolt, so that the position of the hydraulic jack 7 is fixed, and the stability and the accuracy of pressure output are ensured. The slide seat 4 is provided with a counter bore, and the slide seat 4 and a threaded hole of the upper die seat 9 are fixedly connected through an inner hexagon bolt. The lower die holder 17 is provided with a threaded hole which is connected with a counter bore of the die fixing plate 18 through an inner hexagon bolt so as to fix the die 19. The upper end surfaces of the ejector pins 21 and the female die 19 are flush with the upper end surface of the female die fixing plate 18, so that the metal plate to be punched is ensured to be horizontally placed.
The hydraulic press further comprises a supporting spring 8, a limiting sleeve 2 and a limiting sleeve gasket 3, wherein the supporting spring 8 is wound around the periphery of the two upright posts 5 in the hydraulic press, the upper end and the lower end of the supporting spring 8 are respectively connected with the lower end face of the sliding seat 4 and the upper end face of the base 1, the supporting spring 8 is used for realizing resetting of the sliding seat 4, the limiting sleeve 2 is sleeved on the periphery of the other two upright posts 5, the inner diameter of the limiting sleeve 2 is slightly larger than the outer diameter of the upright posts 5, the height of the limiting sleeve 2 is smaller than that of the upright posts 5, the lower end face of the limiting sleeve 2 is connected with the upper end face of the base 1, the limiting sleeve gasket 3 is arranged on the upper end face of the limiting sleeve 2, and the limiting sleeve 2 is used for limiting the bottom dead center position of the sliding seat 4.
The inner diameters of the limiting sleeve 2 and the limiting sleeve gasket 3 are equal and slightly larger than those of the upright posts 5, the limiting sleeve 2 is distributed on the two upright posts 5 diagonally, and the outer diameter of the limiting sleeve gasket 3 is larger than that of the limiting sleeve 2. When the slide seat 4 moves further downwards, the upper end surface of the limit sleeve gasket 3 is contacted with the lower end surface of the slide seat 4, and the slide seat 4 is prevented from moving further under the support of the limit sleeve 2. The upper die cushion block 10 and the limit sleeve gasket 3 are made of polyurethane rubber materials, when the sliding seat 4 moves to the bottom dead center, flexible buffering is provided, rigid collision of the upper die and the lower die is prevented, and the spraying mark is exposed at the intersection of the upper end face of the sliding seat and the upright post, so that excessive downward movement is prevented when manual operation is lost, rigid collision of the upper die and the lower die is caused, and the service life of equipment is influenced.
The lower end face of the inner side of the blank holder limiting plate 11 is in a step shape, the upper end face of the outer side of the blank holder 12 is in a step shape, the lower end face of the step shape in the blank holder limiting plate 11 is matched with the upper end face of the step shape in the blank holder 12, so that the blank holder 12 can be installed on the inner side of the blank holder limiting plate 11 in a vertically movable manner, and meanwhile, the movement stroke of the blank holder 12 is limited by the blank holder limiting plate 11.
The male die 15 in the upper male die unit and the thimble 21 in the lower female die unit are coaxially arranged, a metal plate to be punched is placed between the male die 15 and the thimble 21, and accurate positioning and punching of the metal plate to be punched is achieved through the male die 15, the female die 19, the positioning pin 22 and the thimble 21.
As shown in fig. 8, the upper die holder 9 in the upper punch unit is connected with a die guide 24, the lower die holder 17 in the lower die unit is connected with a die guide post 23, and the die guide 24 is mounted on the upper portion of the die guide post 23 so as to be movable up and down along the die guide post 23.
The bottom fixed connection of hydraulic jack 7 is on slide 4, and the piston rod top of hydraulic jack 7 contacts with the lower surface of top cap 6, and hydraulic jack 7 is used for driving slide 4 and reciprocates.
In the initial state, the lower end face of the blank holder 12 is flush with the lower end face of the blank holder insert 14 and lower than the lower end face of the male die 15, the lower end face of the male die 15 is lower than the lower end face of the blank holder limiting plate 11, and in the initial state, the upper end face of the female die 19 is flush with the upper end face of the thimble 21, and the upper end face of the positioning pin 22 is higher than the upper end face of the thimble 21.
Embodiments of the present invention include the steps of:
in the step S1, during the stroke, the metal plate to be stamped is horizontally arranged on the upper end surface of the female die 19 in the lower female die unit, and the metal plate to be stamped is positioned by the positioning pins 22:
when the metal plate is used for the first time, the metal plate to be stamped is moved to enable the edge of the metal plate to be tangential to the outer diameter of the positioning pin 22 in the lower die unit;
after the holes of the sample are punched on the metal plate, positioning pins 22 can be arranged at the holes on the metal plate to position the metal plate;
Step S2, operating a handle of the hydraulic jack 7, controlling a piston rod of the hydraulic jack 7 to move upwards to push the sliding seat 4 to move downwards, thereby driving an upper die holder 9, an upper die pad 10, a blank holder limiting plate 11, a blank holder 12, a blank holder spring 13, a blank holder insert 14, a punch 15, a ball guide sleeve 16, a punch cushion block 27 and a punch fixing sleeve 28 in an upper punch unit to move downwards integrally, continuing to move, wherein the lower end surface of the blank holder insert 14 in the upper punch unit is firstly contacted with a metal plate to be punched and applies blank pressing force, then the sliding seat 4 continues to move downwards, the blank holder 12, the blank holder insert 14 and the ball guide sleeve 16 are still and are further compressed, the blank pressing force is increased, the movement is continued, a punch 15 in the upper punch unit contacts the metal plate and cooperates with a die 19 to generate shearing force so as to obtain a sample, meanwhile, the rest part (namely a non-sample part in the metal plate) is clamped at the lower end of the punch 15, the punch 15 pushes the sample into the die 19, the sample pushes a blanking spring 21 in the lower die unit to move downwards, and the ejector pin 20 is compressed;
and S3, during return, a pressure reducing valve of the hydraulic jack 7 is opened, a piston rod of the hydraulic jack 7 moves downwards, the supporting spring 8 pushes the sliding seat 4 to move upwards, so that the upper male die unit is driven to move upwards integrally, the blank holder spring 13 grows gradually, the blank holder 12, the blank holder insert 14 and the ball guide sleeve 16 are still fixed, and accordingly the rest part of the non-sample metal plate clamped on the male die 15 is pushed out, and automatic discharging is completed. And the movement is continued, the blank holder limiting plate 11 is continued to be upwards along with the whole body, when the counter bore surface of the inner diameter of the blank holder limiting plate 11 is contacted with the lower end of the outer diameter of the blank holder 12, the blank holder 12 and the blank holder insert 14 are driven to be lifted, the thimble spring 20 stretches, the thimble 21 is pushed upwards to automatically eject a sample, and the automatic reset of the equipment is completed under the pushing of the supporting spring 8.
Finally, it should be noted that the above embodiments are merely for illustrating the technical solution of the present invention, and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not deviate from the essence of the corresponding technical solution from the scope of the technical solution of the embodiments of the present invention.
Claims (10)
1. A hydraulic press for preparing a transmission electron microscope sample, characterized in that:
The stamping die comprises a base (1), a sliding seat (4), an upright post (5), a top cover (6), a hydraulic jack (7), an upper male die unit and a lower female die unit, wherein the top cover (6) and the base (1) are respectively and fixedly connected to the upper end and the lower end of the upright post (5), the sliding seat (4) is positioned between the base (1) and the top cover (6), the sliding seat (4) can be connected to the upright post (5) in a vertically movable manner, the hydraulic jack (7) is arranged between the top cover (6) and the sliding seat (4), the upper male die unit and the lower female die unit are respectively and fixedly connected to the sliding seat (4) and the base (1), a metal plate to be stamped is placed on the lower female die unit, and accurate positioning stamping of the metal plate to be stamped is realized through relative movement between the upper male die unit and the lower female die unit.
2. The hydraulic punching machine for preparing a transmission electron microscopic sample according to claim 1, wherein the upper punch unit comprises an upper die holder (9), an annular upper die cushion block (10), an annular blank holder limiting plate (11), a blank holder (12), a blank holder spring (13), a blank holder insert (14), a punch (15), a ball guide sleeve (16), a punch cushion block (27) and a punch fixing sleeve (28);
The upper surface of the upper die holder (9) is fixedly connected to the lower surface of the sliding seat (4), the upper surface of the upper die cushion block (10) is fixedly connected to the lower surface of the upper die holder (9), the upper surface of the side pressing ring limiting plate (11) is fixedly connected to the lower surface of the upper die cushion block (10), the side pressing ring (12) is arranged in the middle of the side pressing ring limiting plate (11), the side pressing ring embedded block (14) is fixedly arranged on the inner periphery of the side pressing ring (12), the upper die holder (9), the side pressing ring limiting plate (11) and the middle of the side pressing ring embedded block (14) are respectively provided with a first through hole, the top of the male die cushion block (27) is fixedly connected with the lower surface of the sliding seat (4), the upper part and the lower part of the male die fixing sleeve (28) are respectively arranged in the first through holes of the upper die holder (9) and the side pressing ring limiting plate (11), the male die (15) is fixedly arranged on the inner periphery of the male die fixing sleeve (28), the top of the male die (15) and the middle part of the lower surface of the cushion block (27) are fixedly connected with the first through holes (16) which are fixedly arranged at the positions of the middle part (13) of the male die (16) and the middle part is fixedly arranged at the middle part of the side pressing sleeve (16), and the upper end and the lower end of the edge pressing spring (13) are respectively connected with the lower surface of the upper die holder (9) and the top of the edge pressing ring (12), and the edge pressing spring (13) is used for resetting the edge pressing ring (12).
3. The hydraulic punching machine for preparing a transmission electron microscopic sample according to claim 2, wherein the lower die unit comprises a lower die holder (17), an annular die fixing plate (18), a die (19), a thimble spring (20), a thimble (21), a locating pin (22) and a locating pin spring (26), the lower surface of the lower die holder (17) is fixedly connected to the upper surface of the base (1), the lower surface of the die fixing plate (18) is fixedly connected to the upper surface of the lower die holder (17), the die (19) is arranged in the middle of the die fixing plate (18), second through holes are formed in the middle of the die (19), the thimble (21) is arranged at the second through holes in the middle of the die (19) in a vertically movable mode, the bottom end of the thimble (21) is connected with the lower die holder (17) through the thimble spring (20), blind holes are formed in the top of the die (19), the locating pin spring (26) and the locating pin (22) are arranged in the blind holes in the top of the die (19), and the upper end and the lower end of the locating pin spring (26) are respectively connected with the bottom of the locating pin (22) and the blind holes in the bottom surface (19).
4. The hydraulic punching machine for preparing the transmission electron microscopic sample according to claim 2 is characterized by further comprising a supporting spring (8), a limiting sleeve (2) and a limiting sleeve gasket (3), wherein the supporting spring (8) is wound around the periphery of two upright posts (5) in the hydraulic punching machine, the upper end and the lower end of the supporting spring (8) are respectively connected with the lower end face of the sliding seat (4) and the upper end face of the base (1), the supporting spring (8) is used for achieving resetting of the sliding seat (4), the limiting sleeve (2) is sleeved on the periphery of the other two upright posts (5), the lower end face of the limiting sleeve (2) is connected with the upper end face of the base (1), the limiting sleeve gasket (3) is arranged on the upper end face of the limiting sleeve (2), and the limiting sleeve (2) is used for limiting the lower dead center position of the sliding seat (4).
5. The hydraulic punching machine for preparing the transmission electron microscopic sample according to claim 2, wherein the lower end face of the inner side of the blank holder limiting plate (11) is in a step shape, the upper end face of the outer side of the blank holder (12) is in a step shape, the step-shaped lower end face of the blank holder limiting plate (11) is matched with the step-shaped upper end face of the blank holder (12), so that the blank holder (12) can be installed on the inner side of the blank holder limiting plate (11) in an up-down movable manner, and meanwhile, the movement stroke of the blank holder (12) is limited by the blank holder limiting plate (11).
6. A hydraulic stamping machine for preparing a transmission electron microscopic sample according to claim 3 is characterized in that a male die (15) in the upper male die unit and a thimble (21) in the lower female die unit are coaxially arranged, a metal sheet to be stamped is placed between the male die (15) and the thimble (21), and accurate positioning stamping of the metal sheet to be stamped is achieved through the male die (15), a positioning pin (22) and the thimble (21).
7. A hydraulic press for preparing a transmission electron microscopic sample according to claim 3, wherein the upper die holder (9) of the upper punch unit is connected with a die guide sleeve (24), the lower die holder (17) of the lower punch unit is connected with a die guide post (23), and the die guide sleeve (24) is installed at the upper part of the die guide post (23) in a manner of moving up and down along the die guide post (23).
8. The hydraulic punching machine for preparing the transmission electron microscopic sample according to claim 2, wherein the bottom end of the hydraulic jack (7) is fixedly connected to the sliding seat (4), the top end of a piston rod of the hydraulic jack (7) is in contact with the lower surface of the top cover (6), and the hydraulic jack (7) is used for driving the sliding seat (4) to move up and down.
9. The hydraulic punching machine for preparing the transmission electron microscopic sample according to claim 2, wherein the lower end face of the blank holder (12) is flush with the lower end face of the blank holder insert (14) and lower than the lower end face of the male die (15), the lower end face of the male die (15) is lower than the lower end face of the blank holder limiting plate (11), the upper end face of the female die (19) is flush with the upper end face of the ejector pin (21), and the upper end face of the positioning pin (22) is higher than the upper end face of the ejector pin (21).
10. A method for preparing a transmission electron microscopic sample applied to the hydraulic press according to any one of claims 1 to 9, comprising the steps of:
Step S1, horizontally placing a metal plate to be stamped on the upper end surface of a female die (19) in a lower female die unit, and moving the metal plate pair to be stamped to enable the edge of the metal plate to be tangential to the outer diameter of a positioning pin (22) in the lower female die unit;
S2, controlling a piston rod of a hydraulic jack (7) to move upwards to push a sliding seat (4) to move downwards, enabling the lower end face of a blank holder insert (14) to be in contact with a metal plate to be punched and apply blank pressing force, enabling the sliding seat (4) to move downwards continuously, enabling a male die (15) to be in contact with the metal plate and be matched with a female die (19) to generate shearing force so as to punch a sample, meanwhile enabling the rest of the metal plate to be clamped at the lower end of the male die (15), enabling the male die (15) to push the sample into the female die (19), enabling the sample to push a thimble (21) to move downwards, and enabling a thimble spring (20) to compress to complete punching;
And S3, a piston rod of the hydraulic jack (7) moves downwards, and the supporting spring (8) pushes the sliding seat (4) to move upwards, so that the rest part of the metal plate clamped on the male die (15) is pushed out, and automatic discharging is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510260038.0A CN119757427A (en) | 2025-03-06 | 2025-03-06 | A hydraulic punching machine and method for preparing transmission electron microscopy samples |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510260038.0A CN119757427A (en) | 2025-03-06 | 2025-03-06 | A hydraulic punching machine and method for preparing transmission electron microscopy samples |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN119757427A true CN119757427A (en) | 2025-04-04 |
Family
ID=95181923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202510260038.0A Pending CN119757427A (en) | 2025-03-06 | 2025-03-06 | A hydraulic punching machine and method for preparing transmission electron microscopy samples |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN119757427A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100884232B1 (en) * | 2007-08-30 | 2009-02-23 | 한국기초과학지원연구원 | Test piece making device for strain test of transmission electron microscope |
| CN202934026U (en) * | 2012-10-22 | 2013-05-15 | 程灵 | Inverted type punching and blanking compound die |
| CN203002940U (en) * | 2012-11-14 | 2013-06-19 | 李增琴 | Novel fine blanking die |
| CN203758814U (en) * | 2014-03-27 | 2014-08-06 | 南京大学 | Sample punching device of electron microscope |
| CN204866938U (en) * | 2015-07-04 | 2015-12-16 | 胡良红 | Cold punching bending apparatus |
| CN206578179U (en) * | 2017-01-26 | 2017-10-24 | 苏州嘉翔展示道具有限公司 | A kind of three-dimensional synchronous punching machine |
| CN110090889A (en) * | 2019-06-19 | 2019-08-06 | 温州乾含节能科技有限公司 | A kind of punching apparatus of direct burial power distribution cabinet |
| CN212397786U (en) * | 2020-05-21 | 2021-01-26 | 威海聚丰精密模具有限公司 | Double-stamping hardware die |
| CN116251885A (en) * | 2021-12-11 | 2023-06-13 | 上海交通大学 | A Punching Die Capable of Realizing Various Process Parameters and Its Application |
| CN118168879A (en) * | 2024-04-11 | 2024-06-11 | 云南大学 | A high-throughput transmission electron microscope metal sample puncher |
-
2025
- 2025-03-06 CN CN202510260038.0A patent/CN119757427A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100884232B1 (en) * | 2007-08-30 | 2009-02-23 | 한국기초과학지원연구원 | Test piece making device for strain test of transmission electron microscope |
| CN202934026U (en) * | 2012-10-22 | 2013-05-15 | 程灵 | Inverted type punching and blanking compound die |
| CN203002940U (en) * | 2012-11-14 | 2013-06-19 | 李增琴 | Novel fine blanking die |
| CN203758814U (en) * | 2014-03-27 | 2014-08-06 | 南京大学 | Sample punching device of electron microscope |
| CN204866938U (en) * | 2015-07-04 | 2015-12-16 | 胡良红 | Cold punching bending apparatus |
| CN206578179U (en) * | 2017-01-26 | 2017-10-24 | 苏州嘉翔展示道具有限公司 | A kind of three-dimensional synchronous punching machine |
| CN110090889A (en) * | 2019-06-19 | 2019-08-06 | 温州乾含节能科技有限公司 | A kind of punching apparatus of direct burial power distribution cabinet |
| CN212397786U (en) * | 2020-05-21 | 2021-01-26 | 威海聚丰精密模具有限公司 | Double-stamping hardware die |
| CN116251885A (en) * | 2021-12-11 | 2023-06-13 | 上海交通大学 | A Punching Die Capable of Realizing Various Process Parameters and Its Application |
| CN118168879A (en) * | 2024-04-11 | 2024-06-11 | 云南大学 | A high-throughput transmission electron microscope metal sample puncher |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1927496A (en) | Composite cold stamping mold | |
| CN1733384A (en) | A stamping composite mold | |
| CN113680858A (en) | Stamping die resilience quick adjusting device that bends | |
| CN214442216U (en) | Punch drawing device and punch | |
| CN108856463B (en) | Automobile brake pad steel backing punching die | |
| CN108145786B (en) | Novel cutting die capable of automatically discharging waste | |
| CN213104286U (en) | Forming die for precision forging of aluminum alloy special-shaped shell | |
| CN1304138C (en) | Special hydraulic mould stand | |
| CN216441509U (en) | Wedge structure type mould | |
| CN2834730Y (en) | Punching die for parts with protrusion | |
| CN110538922A (en) | progressive die for multiple thinning drawing and reverse drawing | |
| CN214235916U (en) | Mechanism capable of reversely flanging and punching | |
| CN211164307U (en) | Elastic pressing punching die | |
| CN2790742Y (en) | Vortex compressor-vortex plate backpressure shaping mould structure | |
| CN215392057U (en) | Can realize tensile drawing die structure of dysmorphism piece | |
| CN110421058B (en) | Box-shaped bottom trimming die | |
| CN114011952B (en) | A lateral punching reset structure | |
| CN116351998A (en) | A double-station forging die | |
| CN110479849B (en) | a valve mold | |
| CN214919698U (en) | Composite fine blanking die for producing parts with bulges | |
| CN212598363U (en) | Punch press is used in production of elevator sill | |
| CN223733656U (en) | A one-piece concave can molding preparation mold | |
| CN115255121A (en) | A kind of high-strength steel plate multi-angle side punching die and method for automobile seat | |
| CN208575180U (en) | A kind of spoke stamping processing composable mold | |
| CN114535398A (en) | Automatic workpiece side punching die of blanking |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20250404 |