CN105107927A

CN105107927A - Punching die for preparing miniature test piece

Info

Publication number: CN105107927A
Application number: CN201510651308.7A
Authority: CN
Inventors: 尚德广; 张海萌; 刘亚楠; 张子晓; 程焕; 刘小冬
Original assignee: Beijing University of Technology
Current assignee: Beijing University of Technology
Priority date: 2015-10-10
Filing date: 2015-10-10
Publication date: 2015-12-02
Anticipated expiration: 2035-10-10
Also published as: CN105107927B

Abstract

Provided is a punching die for preparing a miniature test piece. A small locating device is additionally arranged for the die, so that location is more accurate, and the purpose of preparing the miniature test piece is achieved. A well cut blank material is put on a punching table with a punched hole, the rolling direction of the material is made to be parallel to the axial direction of the hole, a rocking bar is pressed downwards, a shaft which is connected with the rocking bar drives a punch to move downwards through a gear rack mechanism, the blank material is punched, a formed test piece drops down, the rocking bar is lifted up, and under the assistance of the spring force, the gear rack mechanism drives the punch to move upwards to return back. Due to the fact that the locating device is additionally arranged, the miniature test piece can be punched accurately, a notch is neat, deformation does not exist, and it is observed under a 3500-time microscope that the dimension error is controlled to be about 2 microns.

Description

A kind of diel preparing micro-assay test specimen

Technical field

The invention belongs to machine-building and fatigue damage repairs field, relate to a kind of diel making micro-assay test specimen.

Background technology

Microelectron-mechanical building blocks of function often bears the effect of reciprocal load.Microelectron-mechanical is not that the simple geometry of tradition machinery reduces, and when component is trickle after micro-or nano size, the mechanics of these materials itself, physical property and degree affected by environment thereof have significant change, there will be strong dimensional effect, skin effect etc.The failure mechanism of many materials under micro-nano state there occurs change in essence compared with macrostate, and the fatigue strength of metal mems thin film there occurs remarkable change compared with macrostate.So the fatigue damage healing properties of research mems thin film component, all there is important theory value and practical meaning in engineering.

Due to metal film test sample respectively to size little, only have 25 μm especially in a thickness direction, therefore very little external force will produce very large distortion, causes damage, causes bad impact to result of the test.Thus add the difficulty of test material preparation to a certain extent.

The present invention adds positioner, and successfully prepared required test specimen, scale error is little, and otch is neat, without distortion

Summary of the invention

Main purpose of the present invention is a kind of diel preparing micro-assay workpiece of design, because film sample size is little, prepares the easy stress deformation of test specimen with common diel, and error is large, affects result of the test.

For solving the problems of the technologies described above, the technical solution used in the present invention is a kind of diel preparing micro-assay test specimen, and this device comprises pedestal (1), lead (2), rocking bar (6), support (7), little positioner, large positioner, decompressor, spring (8); Its medium and small positioner comprises punching press platform (13), thin lead (12), iron block (11); Large positioner comprises upper bed-plate (10), axle sleeve (4), base (14), upper bed-plate (10); Decompressor comprises tooth bar (9), gear shaft (5), drift (3), rocking bar (6);

Little positioner, large positioner, decompressor are installed on pedestal (1); Support (7) is fixed on pedestal (1), base (14) is arranged on pedestal (1), both sides between upper bed-plate (10) with base (14) are connected by lead (2), axle sleeve (4), and axle sleeve (4) one end is fixed on upper bed-plate (10) other end and is enclosed within lead (2); Centre between upper bed-plate (10) and base (14) is provided with little positioner, punching press platform (13) and iron block (11) are by thin lead (12) matched in clearance, and iron block (11) can slide along lead (2); Iron block (11) is fixed on base (14), punching press platform (13) is fixed on upper bed-plate (10), be provided with drift (3) in the middle of iron block (11), drift (3) matches with punching press platform (13) and jointly forms the working face of whole diel;

Tooth bar (9) one end is connected with one end of spring (8), and tooth bar (9) other end is connected with upper bed-plate (10), and the other end of spring (8) is connected on support (7); (9) are combined with gear to tooth bar, and the central shaft of gear is connected with rocking bar (6); Be meshed with tooth bar (9) by rotating rocker (6) driven gear, tooth bar (9) drives upper bed-plate (10), iron block (11), drift (3) axially-movable, and drift (3) is meshed with punching press platform (13) and realizes the punching press of micro-assay test specimen.

This mould comprises large positioner, little positioner, decompressor.The steps include:

Step 1): the blank material cut in advance is placed in the stamping station with punching, and makes material shaft to axially parallel with hole;

Step 2): to pressing down rocking bar, drive drift vertical downward movement with rocking bar axle connected vertically by pinion and rack;

Step 3): under the guiding of positioner, the accurate stamping strip material of drift, the test specimen after punching press is fallen on pedestal, and blank is stayed on drift;

Step 4): upwards lift rocking bar, pinion and rack drives drift upward vertical movement, and the spring with hour rack top moves upward due to the effect auxiliary punch of elastic force, makes drift get back to original position.Take off the blank on drift.

The invention has the advantages that: stamping sample dimensions error is little, otch is neat, without distortion, and can Pass Test requirement.

Accompanying drawing explanation

Fig. 1 is the diel schematic diagram in the present invention.

Fig. 2 is two positioner schematic diagrames in the present invention.

Fig. 3 is the gear & rack structure schematic diagram in the present invention.

Fig. 4 is the schematic diagram of the shaping test specimen in the present invention.

In figure: 1, pedestal, 2, lead, 4, axle sleeve, 5, gear shaft, 6, rocking bar, 7, support, 8, spring, 9, tooth bar, 10, upper bed-plate, 11, iron block, 12, thin lead, 13, punching press platform, 14, base.

Detailed description of the invention

Below in conjunction with accompanying drawing, illustrate concrete operations flow process of the present invention by way of example further.Be 25 μm of polycrystalline rolling Copper thin film gap test pieces with mould punching thickness, wherein root radius is 0.5mm.The steps include:

Step 1): provide large positioner, little positioner, decompressor.Its medium and small positioner comprises punching press platform (13), thin lead (12), iron block (11); Large positioner comprises lead (2), axle sleeve (4), base (14), upper bed-plate (10); Decompressor comprises tooth bar (9), gear shaft (5), rocking bar (6);

Step 2): the blank material cut in advance is placed on the punching press platform (13) with punching, and makes material rolling direction axially parallel with hole;

Step 3): to pressing down rocking bar (6), drive drift (3) vertical downward movement with rocking bar gear shaft connected vertically (5) by pinion and rack;

Step 4): under the guiding of two positioners, the accurate stamping strip material of drift (3), the test specimen after punching press is fallen on base (14), and blank is stayed on drift (3);

Step 5): upwards lift rocking bar (6), pinion and rack drives drift (3) upward vertical movement, spring (8) with hour rack top moves upward due to the effect auxiliary punch (3) of elastic force, makes drift get back to original position.Take off the blank on drift (3).

The thick polycrystalline rolling Copper thin film gap test piece of the technology of the present invention 25 μm of preparing as shown in Figure 4.

Claims

1. prepare a diel for micro-assay test specimen, it is characterized in that: this device comprises pedestal (1), lead (2), rocking bar (6), support (7), little positioner, large positioner, decompressor, spring (8); Its medium and small positioner comprises punching press platform (13), thin lead (12), iron block (11); Large positioner comprises upper bed-plate (10), axle sleeve (4), base (14), upper bed-plate (10); Decompressor comprises tooth bar (9), gear shaft (5), drift (3), rocking bar (6);

2. a kind of diel preparing micro-assay test specimen according to claim 1, is characterized in that: the course of work of this diel is as follows,

Step 1): provide large positioner, little positioner, decompressor; Its medium and small positioner comprises punching press platform (13), thin lead (12), iron block (11); Large positioner comprises lead (2), axle sleeve (4), base (14), upper bed-plate (10); Decompressor comprises tooth bar (9), gear shaft (5), rocking bar (6);

Step 5): upwards lift rocking bar (6), pinion and rack drives drift (3) upward vertical movement, spring (8) with hour rack top moves upward due to the effect auxiliary punch (3) of elastic force, makes drift get back to original position; Take off the blank on drift (3).