CN2329466Y

CN2329466Y - Isostatic pressing machine

Info

Publication number: CN2329466Y
Application number: CN 98217418
Authority: CN
Inventors: 董中天
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-07-23
Filing date: 1998-07-23
Publication date: 1999-07-21
Anticipated expiration: 2008-07-23

Abstract

The utility model relates to an isostatic pressing machine which is used for producing permanent magnetic materials. The utility model comprises a machine frame, a pressurizing cylinder, and a high pressure cylinder, wherein, the pressurizing cylinder is positioned at the upper part of the machine frame. A pressurizing piston is connected with a high pressure piston through a piston connecting rod. The high pressure piston and the inner cavity of a guide post are formed in a sliding fit. The guide post is positioned and guided by a guide sleeve. The lower end of the guide post is extended into the high pressure cylinder. The upper side of the guide post is connected with a spherical washer, and is contacted with a transversal slide block through the spherical washer. The transversal slide block is driven by a small oil cylinder which is arranged on the machine frame. The utility model has the advantages of simple structure, reasonable structure, big pressurizing, low cost, and low energy consumption.

Description

Isostatic pressing machine

The utility model belongs to forging equipment, is specially adapted to Nd-Fe-Bo permanent magnet material, presses to wait the static pressure operation after the powder metallurgical technique compression moulding.

Isostatic pressing machine is one of capital equipment of (pressing powder metallurgical technique) production Nd-Fe-B goods, it is that blank is placed liquid medium in the isostatic pressing machine high pressure chest, because the foundation of super-pressure, is subjected to the static pressure of superhigh pressure liquid medium around the workpiece, make its density even, dense structure.Existing isostatic pressing machine is to adopt the continuous supercharging of multistage high-pressure pump to form required super-pressure, because super-pressure oil circuit system and supercharging technology are very complicated, therefore, device structure is huge, the manufacturing cost height, uses energy consumption big.

CN2065517U discloses a kind of isostatic compaction machine, is to adopt the little cylinder of vat socket to realize the supercharging scheme that pressure amplifies.Though this technical scheme has been cancelled the multistage pressure charging system of complicated superpressure oil pump,, obtain the hyperpressure of compacting minitype permanent magnetism material with common hydraulic technique.But, this scheme is because the bore of high pressure chest must be proportional with the plunger floor space, just can reach specified super-pressure, and place plunger bottom the press to be subjected to the restriction of frame, can not accomplish enough big, therefore the high pressure chest bore generally can only be accomplished can only suppress small-sized workpiece under the 150mm.

The purpose of this utility model is to overcome the deficiency of prior art, provide a kind of simple in structure, cost is low, the isostatic pressing machine of less energy consumption, make it both keep common hydraulic technique and obtain super-pressure, can be increased to required size to the high pressure chest bore again, with the compacting large-scale workpiece.

The purpose of this utility model is achieved through the following technical solutions.The isostatic pressing machine that comprises frame (frame is by upper beam, base and two frameworks that side plate is formed), pressurized cylinder, high pressure cylinder, its pressurized cylinder is positioned at the top of frame, charged piston connects high pressure piston through piston rod, the inner chamber of high pressure piston and guide pillar is slidingly matched, guide pillar is by the guide pin bushing positioning and guiding, and the lower end of guide pillar is stretched in the high pressure cylinder, is connected with ball ring above the guide pillar, contact with transverse slider by ball ring, transverse slider drives by rack-mounted small oil tank.

The area of charged piston (S1) is the supercharging multiple with the ratio of high-pressure piston areas (S2), and optional 8-10 doubly.The centre bore and the piston rod of ball ring are slidingly matched.Design has the aperture of exhaust (oil) on the guide pillar, and the partial design that stretches into high pressure cylinder in its lower end has sealing ring.Guide pin bushing has the aperture of the oil extraction corresponding with guide pillar (gas), in its bottom the repairing hole that communicates with oil sump is arranged.Transverse slider is divided into left and right sides two halves, drives with two small oil tanks respectively, keeps bigger gap between its arc surface and the piston rod, makes it when slide block closes up, and piston rod also can move up and down, and design has the window that takes workpiece on the guide pin bushing.

Advantage of the present utility model and effect: (1), because charged piston area (S1) can be 10 times of high-pressure piston areas (S2), therefore, the pressure P 2 of high pressure cylinder will be with the proportional increase of P2=S1/S2 * P1, wherein during the pressure P 1=30MPa of pressurized cylinder, and the pressure P 2=300MPa of high pressure cylinder.Thereby in high pressure cylinder, formed required super-pressure, need not the complication system of multistage supercharging, simplified the structure and reduced cost, reduced the use energy consumption.(2), pressurized cylinder is arranged on the top of press, the selection of high pressure chest diameter and charged piston area S1, high-pressure piston areas S2 are irrelevant, as long as the intensity of high pressure cylinder and frame allows, the high pressure chest diameter can strengthen arbitrarily in frame.Overcome the shortcoming that the little cylinder supercharging of big cylinder sleeve scheme high pressure chest bore is difficult to increasing, thereby can suppress large-scale workpiece.(3), because three reasonable part designs of guide pillar, guide pin bushing, slide block make the press structure compactness, easy to operate.The lower end of guide pillar and high pressure cylinder cooperate, and making guide pillar is the lid of high pressure cylinder, is again the cylinder body of charged piston.Aperture on it can make guide pillar when lower slider, gets rid of air and unnecessary oil in the high pressure chest, has guaranteed the normal pressurization of charged piston.Guide pillars and bushes has cooperated the positioning and guiding effect.Also add a ball ring in the above, can regulate unbalance loading, the centre bore of ball ring cooperates with piston rod to increase the stability of piston rod.Because ball ring centre bore D1 is less than the D2 of charged piston, so can utilize this step pull-up guide pillar during backhaul, open high pressure chest and take workpiece.The slider box of two semi arches gets up to stop on the guide pillar and moves, and guarantees the high pressure piston pressurization, can make high pressure piston drive guide pillar after separately and unhinderedly rise.

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is a kind of structural representation of isostatic pressing machine.

Fig. 2 is the structural representation of guide pillar.

Fig. 3 is the structural representation of guide pin bushing.

Fig. 4 is the structural representation of transverse slider.

As shown in Figure 1, it is a kind of isostatic pressing machine, comprise frame (3), pressurized cylinder (1), high pressure cylinder (10), pressurized cylinder (1) is positioned at the top of frame (3), charged piston (2) connects high pressure piston (7) through piston rod (11), the inner chamber of high pressure piston and guide pillar (17) is slidingly matched, guide pillar is by guide pin bushing (13) positioning and guiding, the lower end of guide pillar is stretched in the high pressure cylinder (10), and O RunddichtringO (9) arranged, the top of guide pillar is fixed with ball ring (5) with screw (12), and (seeing shown in Figure 2), the centre bore of ball ring (D1) is slidingly matched with piston rod (11), plane contact by ball ring and transverse slider (4), transverse slider is divided into left and right sides two halves (seeing shown in Figure 4), drives with two small oil tanks (6) that are fixed on the frame (3) respectively, and its arc surface cooperates with piston rod (11).As shown in Figure 2, the aperture (14) of exhaust (oil) is arranged on the guide pillar (17), as shown in Figure 3, guide pin bushing (13) also has corresponding aperture (15), the repairing hole (16) that is communicated with oil sump (19) in addition in its bottom, and design has the window (8) that picks and places workpiece on the guide pin bushing.The area of charged piston (S1) is 10 times of high-pressure piston areas (S2), and promptly pressure ratio is 10.

The course of work of the present utility model is as follows:

After pressurized cylinder (1) injects hydraulic oil, under the effect of oil pressure P1, charged piston (2) moves down, high pressure piston (7) moves down by piston rod (11), hydraulic oil pressurization to high pressure cylinder (10), form pressure P 2, moving on the guide pillar (17) under the effect of P2 pressure, small oil tank (6) drives transverse slider (4) closure simultaneously, after moving a bit of distance on the guide pillar (17), ball ring (5) and slide block (4) plane contact, and be pressed on the frame (3) have stoped in the continuation of guide pillar (17) and have moved, this moment, P2 and P1 were able to proportional increase, when P1=30MPa, P2=S1/S2 * P1=10 * 30MPa=300MPa, thus in high pressure cylinder, formed super-pressure.Through after the pressurize of certain hour, pressurized cylinder (1) off-load, cavity of resorption injects backhaul oil, high pressure cylinder (10) off-load thereupon, small oil tank this moment (6) drives transverse slider (4) and opens, and the piston (2) of pressurized cylinder (1) rises, high pressure piston (7) drives on the guide pillar (17) and moves, on the window (8) that arrives guide pin bushing (13), take out workpiece (18), whole working cycles is finished.

Claims

1, a kind of isostatic pressing machine, comprise frame, pressurized cylinder, high pressure cylinder, it is characterized in that described pressurized cylinder (1) is positioned at the top of frame (3), charged piston (2) connects high pressure piston (7) through piston rod (11), the inner chamber of high pressure piston and guide pillar (17) is slidingly matched, guide pillar is by guide pin bushing (13) positioning and guiding, the guide pillar lower end is stretched in the high pressure cylinder (10), be connected with ball ring (5) above the guide pillar, contact with transverse slider (4) by ball ring, transverse slider is driven by rack-mounted small oil tank (6).

2, according to the described isostatic pressing machine of claim 1, the area (S1) that it is characterized in that described charged piston (2) is 8-10 a times of high pressure piston (7) area (S2).

3,, it is characterized in that described ball ring centre bore and piston rod (11) are slidingly matched according to the described isostatic pressing machine of claim 1.

4, according to the described isostatic pressing machine of claim 1, it is characterized in that described guide pillar (17) has row's (gas) oilhole (14), the part that high pressure cylinder is stretched in the lower end of described guide pillar (17) has sealing ring (9).

5, according to the described isostatic pressing machine of claim 1, it is characterized in that described guide pin bushing (13) has the outage corresponding with guide pillar (15), the repairing hole (16) that is communicated with oil sump (19) is arranged at the bottom.

6, according to the described isostatic pressing machine of claim 1, it is characterized in that described transverse slider (4) becomes left and right sides two halves, use two small oil tanks (6) to drive respectively, its arc surface and piston rod leave the gap, and it also can be moved up and down when slide block is closed.

7,, it is characterized in that having on the described guide pin bushing (13) window (8) that takes workpiece according to claim 1 or 5 described isostatic pressing machines.