CN201324833Y

CN201324833Y - Forming die for powder metallurgy

Info

Publication number: CN201324833Y
Application number: CNU2008201841377U
Authority: CN
Inventors: 郑运东
Original assignee: SHANXI DONGMU HUASHENG POWDER METALLURGY CO Ltd
Current assignee: SHANXI DONGMU HUASHENG POWDER METALLURGY CO Ltd
Priority date: 2008-12-31
Filing date: 2008-12-31
Publication date: 2009-10-14
Anticipated expiration: 2018-12-31

Abstract

The utility model relates to a forming die for powder metallurgy, comprising an upper punch and a lower punch, wherein a protruding annular groove is arranged on the end surface of the upper punch, and the lower punch is arranged below the upper punch; the lower punch comprises a female die, a first lower punch, a second lower punch, a third lower punch and a mandrel, wherein the first lower punch, the second lower punch and the third lower punch are arranged between the female die and the mandrel, and the first lower punch, the second lower punch and the third lower punch are matched with one another in a clearance way. The utility model has the advantages that: with the C type die carrier particularly for powder metallurgy, and the pulling-down type stripping method, the air-conditioner compressor bearing with an annular noise-silencing groove can be formed once, and the working procedure that the annular groove is processed by a lathe is omitted; and the manufacturing cost is reduced, the productivity is improved, and the material is saved.

Description

A kind of powder used in metallurgy mould

Technical field

The utility model relates to a kind of mould, particularly relates to a kind of powder used in metallurgy mould.

Background technology

At present, the end face that contacts with cylinder at bearing of compressor has annular noise reduction groove can make air-conditioning effectively reduce noise at work, improve efficiency great role is arranged, for independent powder metallurgical technique manufacturing technology alive, the profile that the end face that contacts with cylinder at bearing of compressor has annular noise reduction groove is very complicated, can't produce in batches by the independent technology of machining or powder metallurgy but produce this part by powder metallurgical technique and machining way of combining, production efficiency is very low, manufacturing cost height, quality are also unstable.Therefore be necessary to study,, dispense follow-up machining, realize economical with materials, the purpose that reduces cost to guarantee the using powder metallurgical technique one-shot forming at powder metallurgy forming mould design aspect.

The utility model content

The purpose of this utility model provides a kind of powder used in metallurgy mould, can't produce in batches by the independent technology of machining or powder metallurgy but produce complex contour by powder metallurgical technique and machining way of combining to overcome, end face has the problem of the part of annular noise reduction groove.

The purpose of this utility model is to be achieved through the following technical solutions:

A kind of powder used in metallurgy mould, comprise upper punch and Xia Chong, the below of upper punch is provided with down and dashes, described dashing down comprises former, once dashes, Er Xiachong, dashes and plug for three times, wherein saidly once dash, Er Xiachong, San Xiachong be located between described former and the plug, describedly once dash, two Xia Chong and dash for three times between matched in clearance; The end face of described upper punch is provided with the cannelure of protrusion.

The beneficial effects of the utility model are: adopt the special-purpose C pattern of powder metallurgy frame, the release method of pulling-down type, the air conditioner compressed machine bearing that can one-shot forming has annular noise reduction groove, omitted original operation of utilizing the machined into cannelure, has the reduction manufacturing cost, enhance productivity the advantage of economical with materials.

Description of drawings

Fig. 1 is the assembling schematic diagram of the described powder used in metallurgy mould of the utility model embodiment;

Fig. 2 is the dress powder schematic diagram of the described powder used in metallurgy mould of the utility model embodiment;

Fig. 3 is the compacting schematic diagram of the described powder used in metallurgy mould of the utility model embodiment;

Fig. 4 is the demoulding schematic diagram of the described powder used in metallurgy mould of the utility model embodiment;

Fig. 5 is the compacting upper punch schematic diagram of the described powder used in metallurgy mould of the utility model embodiment;

Fig. 6 is the described powder used in metallurgy mould of a utility model embodiment hubbing combination schematic diagram;

Fig. 7 be the described powder used in metallurgy mould of the utility model embodiment once towards schematic diagram;

Fig. 8 is that two times of the described powder used in metallurgy mould of the utility model embodiment are towards schematic diagram;

Fig. 9 is that three times of the described powder used in metallurgy mould of the utility model embodiment are towards schematic diagram;

Figure 10 is the plug schematic diagram of the described powder used in metallurgy mould of the utility model embodiment.

Among the figure:

1, upper punch; 11, cannelure; 2, Xia Chong; 21, former; 22, once dash; 23, Er Xiachong; 24, San Xiachong; 25, plug.

The specific embodiment

Shown in Fig. 1-10, the described a kind of powder used in metallurgy mould of the utility model embodiment, comprise upper punch 1 and dash 2 down, the cannelure 11 that the end face of described upper punch 1 is provided with protrusion has and cannelure 11 corresponding protrusion type structures to make on upper punch 1, can form when moulding and have the ring-shaped groove consistent with part shape, the below of upper punch 1 is provided with down and dashes 2; Described dashing down 2 comprises former 21, once dashes to dash for 22, two times and dash 24 and plug 25 for 23, three times; Described former 21 adopts the wolfram steel materials to make, and forms die cavity in pressed powder wherein; Be provided with between described former 21 and the plug 25 to dash to dash for 22, two times and dash 24 23 and three times; Described once dash dash for 22, two times dash 24 23 and three times between matched in clearance, wherein dash the 22 following sections that are used for forming part once, dash the 23 valve pool positions that are used for forming part for two times, dash the 24 shank end faces that are used for forming part for three times; The circular hole of described plug 25 each perforations of forming part.The powder used in metallurgy mould is installed on three the C pattern frame.

During concrete the use, the described a kind of powder used in metallurgy mould forming process of the utility model embodiment is divided into powder filling, compacting, demoulding three phases.During powder filling, the dress powder height of each section is that parameter is calculated with part height and compression ratio.The powder feeding boots are shaken 3-5 time on die cavity top according to default program, to guarantee that powder is by closely knit being filled in the die cavity.During compacting, after the operation program of press starts, upper punch 1 moves down, when just contacting with powder, and the plug 25 at the center 1-4 millimeter that under the default programme-control of press, moves up, because the frictional force of plug 25 and iron powder, so the part iron powder can be moved to more than the plane of die cavity, upper punch 1 begins pressurization then, and former 21 moves down under the frictional force effect of iron powder, dash 23 towards 22, two times once and be moved down into respectively on the slide block, iron powder is pressed moulding.During the demoulding, former 21 is left behind, and adopts the mode of the protection demoulding, and upper punch 1 contacts with the last section of part all the time, prevents because elastic after effect causes recessive crackle occurring in the position that part section changes.When former 21, once dash dash for 22, two times 23 deviate from fully after, upper punch 1 is return, center plug 25 is left behind, and finishes the demoulding.The compressor sintered metal powder bearing that compacting tool set design that adopts according to the utility model and pressing process can utilize powder metallurgical technique to produce to have annular noise reduction groove, through experimental verification, can satisfy instructions for use fully, substitute original bearing that utilizes mechanical processing technique to make.

Claims

1, a kind of powder used in metallurgy mould comprises upper punch (1) He Xiachong (2), and the below of described upper punch (1) is provided with down and dashes (2); It is characterized in that: described dash down (2) comprise former (21), dash (22), Er Xiachong (23), San Xiachong (24) and plug (25) once, wherein said dash (22), Er Xiachong (23) once and dash (24) for three times be located between described former (21) and the plug (25), described once towards (22), Er Xiachong (23) and three times towards matched in clearance between (24); The end face of described upper punch (1) is provided with the cannelure (11) of protrusion.