CN201008974Y

CN201008974Y - Compacting mould for powder metallurgy

Info

Publication number: CN201008974Y
Application number: CNU2006201624272U
Authority: CN
Inventors: 彭景光; 张志勇; 蒋叶琴
Original assignee: SHANGHAI AUTOMOBILE POWDER METALLURGY CO Ltd
Current assignee: SHANGHAI AUTOMOBILE POWDER METALLURGY CO Ltd
Priority date: 2006-12-29
Filing date: 2006-12-29
Publication date: 2008-01-23
Anticipated expiration: 2016-12-29

Abstract

The utility model relates to a mould, in particular to a press mould for powder metallurgy press method of sound wheel or other parts with teeth on the end face. The mould comprises a press upper mould, a press negative mould, a press lower mould and a core stick, wherein the press lower mould comprises a press outer lower mould, a press middle lower mould and a press inner lower mould, wherein, the press outer lower mould, the press middle lower mould and the press inner lower mould are arranged between the press negative mould and the core stick. The utility model has the advantages that a press method of press type demoulding by ''one upside and three downsides'' is adopted. Compared with the traditional mechanical manufacture art, the powder metallurgy production of the mould has a high producing efficiency with a production rate of 5-6 parts in one minute. The material is saved with no cutting.

Description

A kind of powder used in metallurgy compacting tool set

Technical field

The utility model relates to a kind of mould, specifically, relates to the compacting tool set that the powder metallurgy pressing method of parts such as the toothed phonic wheel of end face is used.

Background technology

The toothed phonic wheel of end face is a part in the automobile ABS system, and its structure is a toothed part of end face as shown in Figure 1, and the contour structures complexity can't pass through the machine-tooled method mass production, and production efficiency is low, the manufacturing cost height.Produce this type of part now and mostly adopt powder metallurgy method,, realize the powder metallurgy production in enormous quantities so be necessary to design a kind of powder used in metallurgy mould.

At Chinese patent Granted publication CN2756437Y, a kind of powder used in metallurgy compacting tool set is disclosed, comprise: hubbing, compacting patrix, compacting counterdie and compacting plug, hubbing comprises at least two die cavities that run through former, these at least two die cavities with the central shaft of hubbing for running through former axisymmetrically; Patrix has the stamping of the quantity that equates with hubbing, and those stamping one are located on the compacting patrix.This mould can be suppressed motorcycle chain tensioner brake(-holder) block part, but this mould exists the shortcoming that can't suppress parts such as phonic wheel.

The utility model content

The purpose of this utility model is to provide a kind of powder used in metallurgy compacting tool set, and it can be used for producing in enormous quantities, and the production efficiency height.

The purpose of this utility model realizes by following technical method: a kind of powder used in metallurgy compacting tool set, comprise: compacting patrix, hubbing, compacting counterdie and plug, the compacting counterdie comprises in the outer counterdie of compacting, the compacting counterdie in the counterdie and compacting, suppress outer counterdie, suppress in counterdie and suppress interior counterdie and be located between hubbing and the plug.Suppress outer counterdie band tooth, make the direct press forming of phonic wheel end face tooth portion, need not further machined.

Powder metallurgy disclosed in the utility model is as follows with its advantage of compacting tool set: the utility model adopts the drawing method of " on once three ", the pulling-down type demoulding, use the powder metallurgy production of this mold to compare with traditional mechanical processing technique, has the production efficiency height, can produce 5-6 part in one minute, few nothing cutting, advantages such as economical with materials.

Description of drawings

Figure 1A to C is profile, front view and the partial schematic diagram of the existing toothed phonic wheel of end face;

Fig. 2 A to C is profile, front view and the partial schematic diagram of the toothed phonic wheel of end face of the utility model powder metallurgy pressing mould compacting;

Fig. 3 A to C is dress powder, the compacting of product compacting, the three phases schematic diagram of the demoulding;

Fig. 4 is the hubbing combination schematic diagram of the utility model powder metallurgy pressing mould;

Fig. 5 is the compacting patrix schematic diagram of the utility model powder metallurgy pressing mould;

Fig. 6 A, 6B are the outer counterdie schematic diagram of the compacting of the utility model powder metallurgy pressing mould, and Fig. 6 A, 6B are respectively profile, the front view of the outer counterdie of compacting;

Fig. 7 is a counterdie schematic diagram in the compacting of the utility model powder metallurgy pressing mould;

Fig. 8 is the interior counterdie schematic diagram of the compacting of the utility model powder metallurgy pressing mould.

The specific embodiment

The utility model is according to the serviceability of the toothed phonic wheel of end face, combining powder metallurgical technology characteristics have been made local modification to the structure of phonic wheel, has proposed the compacting tool set that powder metallurgy pressing is efficiently used simultaneously.See also Fig. 2, the phonic wheel after the improvement is removed chamfering in a side in hole, goes out chamfering with the machined car.

At first according to the press model, in conjunction with the phonic wheel design feature, determine the mould bases model, design meets a cover compacting tool set part of phonic wheel powder metallurgy processing.Because the height of end face tooth is higher, for the density that improves product be beneficial to shaping, the utility model adopts the drawing method of " on once three ", the pulling-down type demoulding, and compacting tool set comprises as lower member:

1. hubbing is in pressed powder wherein or presses sintered part again and form the stamper component of die cavity.See also Fig. 4, the utility model hubbing carries out a certain amount of convergent-divergent according to the characteristic of powder, to guarantee the stable of finished size.

The compacting patrix be in the compacting in order to from top airtight former, transmit the parts of pressure for powder or sintered part from the top down.See also Fig. 5, compacting patrix of the present utility model is according to product upper surface shaped design, and cooperates in former.

The outer counterdie of compacting be in the compacting in order to cooperate the airtight together former of other counterdies, the bottom-up parts of transmitting pressure for powder or sintered part from the bottom, be used for the counterdie of phonic wheel tooth portion shaping.See also Fig. 6 A, 6B suppresses outer counterdie band tooth and sees 31 among Fig. 6 B, and outer counterdie band tooth makes the direct press forming of phonic wheel end face tooth portion, need not further machined.According to the scope of activities and the product height of the outer counterdie of compacting in the compacting, determine the active section length of the outer counterdie of compacting, and determine the height of the outer counterdie of compacting according to the mould bases size.

In the compacting counterdie be in the compacting in order to cooperate the airtight together former of other counterdies, the bottom-up parts of transmitting pressure for powder or sintered part from the bottom, be the counterdie between the counterdie at the outer counterdie of compacting and in suppressing.See also Fig. 7, can determine its concrete dimensional parameters according to product structure.

In the compacting counterdie be in the compacting in order to cooperate the airtight together former of other counterdies, the bottom-up parts of transmitting pressure for powder or sintered part from the bottom, be to be used for phonic wheel microcephaly neck forming lower die.See also Fig. 8, because interior counterdie is installed on the fixed form, inertia in whole process is so will determine accurately that its height is to guarantee product size.

6. the compacting plug is the mold component that is used on pressing direction pressed compact or sintered body internal shaping contoured surface.Consider less on this phonic wheel part, shorten its length overall during the design of compacting plug as far as possible.

Adopt the powder used in metallurgy mould of above-mentioned member combination to see Fig. 3 A, shown in the 3B.This powder used in metallurgy mould comprises compacting patrix 1, and former 2 is suppressed outer counterdie 3, and counterdie 4 in the compacting, counterdie 5 and plug 6 in the compacting.Wherein counterdie 4 is fixed on the collapsible form in outer counterdie 3 of compacting and the compacting, and this collapsible form is parts of press, and counterdie 5 is fixed on the fixed form in the compacting, and this fixed form is parts of press, and plug 6 is fixed on former 2 base plates.

The product pressing process is divided into the dress powder, and compacting and demoulding three phases are please consulted Fig. 3 A, 3B, 3C respectively.

During the dress powder, compacting patrix 1 does not enter former 2.With counterdie 5 in suppressing is benchmark, equals compression ratio according to dress powder height and multiply by the product height and determine each section height, and adjust in former 2, the outer counterdie 3 of compacting, the compacting counterdie 4 and arrive and adorn the powder position.Feed shoe filling powder.

During compacting, compacting patrix 1 enters former 2 downwards, and former 2 is forced to float, suppress outer counterdie 3, suppress in counterdie 4 float to the pressing position, four pressing dies and former 2 actings in conjunction make powder pressing.

During the demoulding, adopt the pulling-down type demoulding.Suppress patrix 1 and rise, former 2 is drop-down, suppresses counterdie 4 in outer counterdie 3, the compacting, the interior counterdie of compacting 5 arrival demoulding positions, makes product pressed compact 8 deviate from former 2.

The toothed phonic wheel of suppressing according to compacting tool set described in the utility model of end face satisfies the performance requirement of phonic wheel in the ABS system through verification experimental verification.

The method of traditional machining, when making the end face tooth parts, efficient is low, and cost is higher.The drawing method of compacting tool set of the present utility model " on once three ", the pulling-down type demoulding can be enhanced productivity significantly, makes full use of equipment, has reduced production cost.And owing to adopted three compacting counterdies, tooth portion density is improved, thereby can guarantee the quality and the precision of part.

Claims

1. powder used in metallurgy compacting tool set, comprise: compacting patrix, hubbing, compacting counterdie and plug, it is characterized in that: the compacting counterdie comprises in the outer counterdie of compacting, the compacting counterdie in the counterdie and compacting, suppress outer counterdie, suppress in counterdie and suppress interior counterdie and be located between hubbing and the plug.

2. powder used in metallurgy compacting tool set according to claim 1 is characterized in that: suppress outer counterdie end face band tooth.