CN102649158A - Tooth yoke and manufacturing method thereof - Google Patents

Abstract

The invention relates to a tooth yoke and a manufacturing method thereof, which are characterized in that: the components of a powder metallurgy material contain ferrous powder (Fe) and ferrous silicate powder (FeSi). The manufacturing method comprises the following steps of: (1) V mixing: uniformly mixing Fe powder and FeSi powder in proportion; (2) high-mixing: mixing the mixed powder and an adhesion agent in proportion to form feedstock; (3) injection molding: injecting the feedstock into a module so as to manufacture a product blank at the temperature of 150 DEG C to 170 DEG C; (4) extracting: carrying out heat insulation on the blank in an extracting agent for 12h-48h at the temperature of 60 DEG C-80 DEG C, and extracting wax; (5) degreasing: controlling temperature for 30h at the temperature of 450 DEG C-600 DEG C, and removing lipid; and (6) sintering: controlling temperature for 30h at the temperature of 1200 DEG C-1300 DEG C, and manufacturing a finished product. The tooth yoke and the manufacturing method thereof have the advantages of reduced product cost, high stock utilization, high production efficiency and the like.

Description

A kind of tooth yoke and manufacturing approach thereof

Technical field

The present invention relates to the powdered metallurgical material technical field, specifically a kind of tooth yoke and manufacturing approach thereof.

Background technology

As everyone knows, the tooth yoke all is to adopt mach method processing at present, and special because of its shape, the machined difficulty is very high, and this method causes production efficiency low, stock utilization low (can only reach about 50%), and then cause production cost higher.

Summary of the invention

The present invention is directed to the deficiency that exists in the prior art, propose a kind of tooth yoke and manufacturing approach thereof that can effectively improve stock utilization and product quality, reduce production costs, enhance productivity.

The present invention reaches through following measure:

A kind of tooth yoke is characterized in that its component comprises iron powder, iron silica flour, and its percentage by weight is:

Iron powder Fe:95%-99%,

Iron silica flour FeSi:1%-5%.

A kind of manufacturing approach of tooth yoke is characterized in that comprising the following step:

Step 1: mix and to get the raw materials ready, with Fe powder, FeSi powder Fe powder: 95%-99% by weight percentage, FeSi powder 1%-5% sends in the V-type batch mixer, fully mixes.

Step 2: the preparation feeding, at first 70: 30 by weight percentage mixed of paraffin and polyethylene is become binding agent, step 1 gained mixture and 100: 8.4 by weight percentage ratio of binding agent are sent in the high mixer the mixed product feeding that gets.

Step 3: moulding, use injection machine that above-mentioned gained feeding is expelled in the mould, be under 150 ℃-170 ℃ the condition, to make the product blank, and pare off cast gate and overlap at forming temperature.

Step 4: extraction, the gained blank is put into extractant alcohol, extraction is 12-48 hour under temperature 60-80 ℃ condition, and the wax in the blank is extracted.

Step 5: degreasing, the blank after the extraction is put into debinding furnace, under the condition of 450 ℃-600 ℃ of temperature, degreasing 30 hours removes binding agent remaining in the blank.

Step 6: sintering, the blank after the ungrease treatment is sent into sintering furnace, sintering is 30 hours under the condition of 1200 ℃-1300 ℃ of temperature, obtains sintered part.

Step 7: polishing, the sintered part that obtains is put into polishing machine carry out polishing, make product.

The present invention adopts the powder metallurgy injection molding technology in manufacturing process, stock utilization is increased to 100% from about 50%, and product density reaches 7.5g/cm ³, compare with traditional processing technology, have and can effectively reduce production cost, enhance productivity and significant advantage such as product size precision.

Description of drawings

Accompanying drawing 1 is a structural representation of the present invention;

Accompanying drawing 2 is cutaway views of the present invention;

Accompanying drawing 3 is variations in temperature sketch mapes of degreasing process of the present invention;

Accompanying drawing 4 is variations in temperature sketch mapes of sintering circuit of the present invention.

The specific embodiment

Below in conjunction with accompanying drawing and embodiment the present invention is done further explanation.

The present invention proposes a kind of tooth yoke and manufacturing approach thereof; Wherein the shape and structure of tooth yoke is shown in accompanying drawing 1 and accompanying drawing 2; Its component comprises iron powder, iron silica flour, and its percentage by weight is: Fe powder: 95%-99%, FeSi powder: 1%-5%; Its manufacturing approach comprises: mix and get the raw materials ready, prepare feeding, moulding, extraction, degreasing, sintering and polishing, thereby obtain finished product.

Embodiment 1:

(1) with metal dust by the following weight mixing in the V-type batch mixer of packing into: Fe powder 99Kg, FeSi powder 1Kg.

(2) by mass percentage: 100: 8.4 ratio adds mixing in the high mixer, and is broken into granule, promptly obtains feeding with the metal dust of above-mentioned mixing and binding agent.

(3) feeding is added in the injection machine hopper, then injection temperature is set at 150 ℃, inject, produce blank, and pare off the cast gate and the overlap of blank.

(4) the blank pendulum is put into extractant on extracting disk, and 60 ℃ are incubated 12h down.

(5) blank after the extraction is put into debinding furnace, and skimming temp is 450 ℃, and fltting speed is per 60 minutes one boats.

(6) blank after the degreasing is put into sintering furnace, and sintering temperature is 1200 ℃, and fltting speed is per 60 minutes one boats.

(7) sintered part polishing, product examine gets final product.

Embodiment 2:

(1) with the metal dust mixing in the V-type batch mixer of packing into as following weight percent: Fe powder 97Kg, FeSi powder 3Kg.

(2) by mass percentage: 100: 8.4 ratio adds mixing in the high mixer, and is broken into granule, promptly obtains feeding with the metal dust of above-mentioned mixing and binding agent.

(3) feeding is added in the injection machine hopper, injection temperature is set at 170 ℃, and blank is produced in injection.

(4) the blank pendulum is put into the extraction stove on extracting disk, and 80 ℃ are incubated 48h down.

(5) blank after the extraction is put into debinding furnace, and skimming temp is 600 ℃, and fltting speed is per 60 minutes one weeks.

(6) blank after the degreasing is put into sintering furnace, and sintering temperature is 1300 ℃, and fltting speed is per 60 minutes one weeks.

(7) sintered part polishing, product examine gets final product.

Embodiment 3:

(1) with the metal dust mixing in the V-type batch mixer of packing into as following weight percent: Fe powder 95Kg, FeSi powder 5Kg.

(2) by mass percentage: 100: 8.4 ratio adds mixing in the high mixer, and is broken into granule, promptly obtains feeding with the metal dust of above-mentioned mixing and binding agent.

(3) feeding is added in the injection machine hopper, injection temperature is set at 160 ℃, and blank is produced in injection.

(4) the blank pendulum is put into the extraction stove on extracting disk, and 70 ℃ are incubated 24h down.

(5) blank after the extraction is put into debinding furnace, and skimming temp is 500 ℃, and fltting speed is per 60 minutes one weeks.

(6) blank after the degreasing is put into sintering furnace, and sintering temperature is 1250 ℃, and fltting speed is per 60 minutes one weeks.

(7) sintered part polishing, product examine gets final product.

Claims (2)

1. a tooth yoke is characterized in that its component comprises iron powder, iron silica flour, and its percentage by weight is:

Iron powder Fe:95%-99%;

Iron silica flour FeSi:1%-5%.

2. the manufacturing approach of a tooth yoke is characterized in that comprising the following step:

Step 1: mix and to get the raw materials ready, with Fe powder, FeSi powder Fe powder: 95%-99% by weight percentage, FeSi powder 1%-5% sends in the V-type batch mixer, fully mixes.

Step 2: the preparation feeding,, send in the high mixer the mixed feeding that gets with step 1 gained mixture and 100: 8.4 by weight percentage ratio of binding agent.

Step 3: moulding, use injection machine that above-mentioned gained feeding is expelled in the mould, be under 150 ℃-170 ℃ the condition, to make the product blank, and pare off cast gate and overlap at forming temperature.

Step 4: extraction, the gained blank is put into extractant, extraction is 12-48 hour under temperature 60-80 ℃ condition, and the wax in the blank is extracted.

Step 5: degreasing, the blank after the extraction is put into debinding furnace, under the condition of 450 ℃-600 ℃ of temperature, degreasing 30 hours removes binding agent remaining in the blank.

Step 6: sintering, the blank after the ungrease treatment is sent into sintering furnace, sintering is 30 hours under the condition of 1200 ℃-1300 ℃ of temperature, obtains sintered part.

Step 7: polishing, the sintered part that obtains is put into polishing machine carry out polishing, make product.

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