CN201264092Y

CN201264092Y - Self-pressing machine material-pushing plate special for carbide alloy light sheet product

Info

Publication number: CN201264092Y
Application number: CNU200820172561XU
Authority: CN
Inventors: 高新亮; 刘以兴; 刘玉
Original assignee: JINAN INSTITUTE OF METALLURGICAL SCIANCE
Current assignee: JINAN INSTITUTE OF METALLURGICAL SCIANCE
Priority date: 2008-10-14
Filing date: 2008-10-14
Publication date: 2009-07-01
Anticipated expiration: 2018-10-14

Abstract

The utility model discloses an automatic common hard alloy powder press scraping wing. A special automatic hard alloy sheet product press scraping wing comprises a push plate, and also comprises an incline block at the front of the push plate, the incline of the incline block and the push plate form a big end up wedge hopper, and the lower end of the big end up wedge hopper is provided with a linear discharging hole. The utility model has simple structure and uniform feeding density.

Description

The special use of carbide alloy thin plate based article is from the press scraping wings

(1) technical field

The utility model relates to a kind of ordinary rigid alloy powder mo(u)ldenpress scraping wings, is specifically related to the special-purpose scraping wings that the compression moulding of a kind of thin plate series hard alloy goods is used.

(2) background technology

Hart metal product is a kind of product that sintering forms after cemented carbide powder compression moulding, thin plate series hard alloy goods are common during from press compression moulding, with reference to Figure of description 1, at first to the carbide alloy powder be transported in the die cavity 4 on the low punch 3 by scraping wings 1.Because present scraping wings is provided with a square feed bin 2 that is used to store up the carbide alloy powder, this material outlet lower openings cooperates with last float plate 5 to be used for carrying powder, and when scraping wings was positioned at above the die cavity, powder can flow down naturally.But in course of conveying, because of inertia and the different powder that makes of feeding time have a very big density contrast along feed direction after entering die cavity, the local density of elder generation's feeding is big, the local density of last feeding is little, make pressed compact occur lamination defect easily in the density general goal, do not press defective in the easy appearance in the little place of density, thereby cause the compacting waste product, can't suppress.And the goods after sintering dwindles become the trapezoidal goods that occur concentric reducer before and after the width because the variation of green density is also contracted by original rectangular pressed compact, and products thickness also occurs inconsistent everywhere.In order to obtain rectangular goods, there is a kind of scheme that the compacting tool set drift is done in echelon now, it is trapezoidal that pressed compact is become, to dwindle the concentric reducer of sintered article, but because along with density contrast instability before and after the variation pressed compact of powder, can't determine trapezoidal Angular Dimension when making the mould design, design and produce to mould and cause difficulty.

Cause the reason of above-mentioned defective to be, make the pressed compact front portion be in the feeding state all the time because scraping wings magazine feed mouth is long, and the rear portion feeding time is shorter relatively, the density difference is bigger before and after having caused like this.Stockpile when the difference of the granularity of material grain makes feeding in the feed bin is anterior to be bigger particle, the lower floor of die cavity and rear portion are concentrated and are bigger particle like this, the rear portion is filled up seemingly and reality is not filled up, and the big and rear portion of density difference does not press phenomenon before and after so having caused yet.

(3) summary of the invention

The utility model causes the even defective of feeding density unevenness easily at present existing scraping wings, provides a kind of simple in structure, and the special use of the uniform carbide alloy thin plate of feeding density based article is from the press scraping wings.

The technical solution adopted in the utility model is:

The special use of the utility model carbide alloy thin plate based article comprises a flitch from the press scraping wings, also comprises the skewback of a described push pedal front, and the inclined-plane of this skewback and described push pedal constitute up big and down small wedge shape feed bin, and its lower end is the capable discharging opening of a line.

The special use of above-mentioned carbide alloy thin plate based article is from the press scraping wings, and described wedge shape feed bin top is one to be fixed on plate on the scraping wings body by screw.

The utility model can make the front and back feeding time basic identical, and discharging opening is at the uniform velocity to scrape (one back and forth) twice substantially on die cavity, because the carbide alloy powder is that nature gutters down basically, can not produce the phenomenon of density unevenness, the yield rate height here.And discharging opening shrinks less that coarse granule is separated from stockpile, this rear portion, sample chamber fullness rate may increase.

Scraping wings of the present utility model greatly reduces the density contrast of thin plate based article pressed compact along the feed direction front and back, eliminated the compacting defective, made when press is pressed the rectangle sheet products, mould can have been manufactured and designed and be rectangle, improve mould interchangeability, reduced the mould manufacture difficulty.

(4) description of drawings

Fig. 1 is the user mode figure of background technology scraping wings.

Fig. 2 is the sectional structure schematic diagram of the utility model embodiment scraping wings.

Among the figure: 1, scraping wings, 2, square feed bin, 3, low punch, 4, die cavity, 5, go up float plate, 6, flitch, 7, the wedge shape feed bin, 8, skewback, 9, screw, 10, linear discharging opening.

(5) specific embodiment

Specify principle of the present utility model below in conjunction with Figure of description:

With reference to the attached Fig. 1 and 2 of explanation, the special use of present embodiment carbide alloy thin plate based article comprises a flitch 6 from the press scraping wings, also comprises the skewback 8 of a described push pedal front, the inclined-plane of this skewback and described push pedal constitute up big and down small wedge shape feed bin 7, and its lower end is a linear discharging opening 10.

Described wedge shape feed bin top is one to be fixed on plate on the scraping wings body by screw 9, and this is convenient to the setting of skewback.

It below is we verify the scraping wings of utility model with the large quantities of selective examination record of 60 * 25 * 2 rectangle sheet products the old and new scraping wings comparison example implementation result.

60 * 25 * 2.5 goods are that length is the carbide alloy thin plate of 60mm width 25mm thickness 2.5mm, and scraping wings is along the feeding of width 25mm direction, so be vicissitudinous along the green density of 25mm direction during compacting.We can analyze this variable density by the extent of constriction coefficient before and after two pairs of edge lengths of the non-feed direction of goods (the long limit of 60mm) sintering.

The ratio of goods each the limit size of sintering constriction coefficient after to be each limit size of powder compact with sintering shrink, if then the missionary society of each limit constriction coefficient is very little for the green density uniformity, otherwise if the difference of big each the limit constriction coefficient of green density difference also can be big.

Table 1, the large quantities of selective examination records of 60 * 25 * 2.5 goods

By table 1 as can be seen, the difference of two pairs of edge lengths constriction coefficients is 0.025 before and after original scraping wings goods feed direction, the utility model scraping wings then is 0.006, improvement that the utility model scraping wings is very big has been described green density, realize the change of suppression performance, guaranteed thin plate series hard alloy goods carrying out smoothly of compacting automatically.

Claims

1. carbide alloy thin plate based article special use is from the press scraping wings, comprise a flitch (6), it is characterized in that: also comprise the skewback (7) of a described push pedal front, the inclined-plane of this skewback and described push pedal constitute up big and down small wedge shape feed bin (8), and its lower end is the capable discharging opening of a line (10).

2. carbide alloy thin plate based article according to claim 1 special use is characterized in that from the press scraping wings: described wedge shape feed bin top is one to be fixed on plate on the scraping wings body by screw (9).