CN103480673A - Method for manufacturing novel die core of wire drawing die - Google Patents
Method for manufacturing novel die core of wire drawing die Download PDFInfo
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- CN103480673A CN103480673A CN201310455492.9A CN201310455492A CN103480673A CN 103480673 A CN103480673 A CN 103480673A CN 201310455492 A CN201310455492 A CN 201310455492A CN 103480673 A CN103480673 A CN 103480673A
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Abstract
The invention discloses a method for manufacturing a novel die core of a wire drawing die. The method comprises the following steps: (a) manufacturing a framework gasket; (b) preparing a die core material; (c) pressing a die core; (d) sintering the die core; (e) preparing a die hole; (f) post-processing the die core. The method is reasonable in process, simple and convenient to implement and moderate in cost; due to the arrangement of the framework gasket in the die core, the bending resistance, the pressure resistance and the wear resistance of the die core are effectively improved, and the service life of the die core is longer; meanwhile, the strength and the precision of the two ports of the die hole are effectively improved, the wire drawing process is smoother, and the drawing quality is better.
Description
Technical field
The present invention relates to a kind of manufacture method of die core of wire-drawing die, the manufacture method of the novel die core of wire-drawing die that a kind of bending resistance and anti-pressure ability are outstanding, belong to the technology of die manufacturing field.
Background technology
The production technology of traditional die core of wire-drawing die is to use the W-Co kind cemented carbide powder, compressing by powder metallurgical technique.This kind of core rod is general in the performance of the aspects such as density, hardness and wearability, and especially the performance of bending resistance and resistance to compression aspect is lower.And adopt the raw materials such as natural diamond or artificial diamond to prepare core rod, and its preparation cost is higher, and technique is comparatively complicated.
Owing to having larger friction and vibration in the wire drawing process, die core of wire-drawing die is very easy to loss, and therefore, the maintenance of wire drawing die and renewal cost have accounted for drawing and produced more than 50% of total consumptive material.In sum, how to reduce the manufacturing cost of die core of wire-drawing die and improve the important research topic that becomes current wire drawing die field its service life.
Summary of the invention
For the demand, the invention provides a kind of manufacture method of novel die core of wire-drawing die, this manufacture method procedure arrangement is reasonable, is easy to implement, and the core rod made has good bending resistance and anti-pressure ability, and the service life of core rod is more lasting; Simultaneously, the intensity of nib two-port and precision have obtained effective lifting, make the drawing process of wire rod more smooth, and the drawing quality is higher.
The present invention is a kind of manufacture method of novel die core of wire-drawing die, and this manufacture method comprises the steps: a) to manufacture the skeleton pad, b) preparation core rod material, and c) compacting core rod, the d) sintering of core rod, e) prepare nib, f) core rod post processing.
In a preferred embodiment of the present invention, in described step a), the material of skeleton pad is diamond, and process equipment is diamond grinders' dop; The diameter of the skeleton pad made is about 1.2-1.3cm, and thickness is about 4-5mm.
In a preferred embodiment of the present invention, in described step b), the main component of core rod material is: tungsten carbide, titanium carbide, cobalt, molybdenum, nickel, chromium, manganese and iron; Powder evenly mixes in the mix and blend cylinder, and mixture temperature is controlled at 70 ℃-80 ℃, adds appropriate paraffin in the batch mixing process, and mixing time is controlled at 2-2.5 hour.
In a preferred embodiment of the present invention, in described step c), the core rod material is divided into underlying material, middle layered material and top layer material, and the pressing process of core rod is as follows: at first, lay underlying material the compacting of working pressure machine, pressure is controlled at 30-35t; Then, lay skeleton pad (lower skeleton) and lay middle layered material, the compacting of working pressure machine, pressure is controlled at 35-40t; Finally, lay skeleton pad (upper skeleton) and lay the top layer material, reuse the forcing press compacting, pressure is controlled at 38-42t; After core rod is compressing, also need to carry out the techniques such as the demoulding, drying, deburring.
In a preferred embodiment of the present invention, in described step d), the sintering operation of core rod carries out in molybdenum wire furnace, and sintering process can be divided into three phases; First stage, when sintering temperature reaches 600 ℃-800 ℃, be incubated 30 minutes; Second stage, when sintering temperature reaches 1000 ℃-1200 ℃, be incubated 40 minutes; Phase III, when sintering temperature reaches 1440 ℃-1480 ℃, be incubated 50 minutes; In whole sintering process, use hydrogen as protective gas, the core rod after sintering is cooling in a vacuum.
In a preferred embodiment of the present invention, in described step e), adopt pulse laser to carry out nib processing, laser pulse width is 1 millisecond, the fenestra aperture made is about 1-1.2mm.
In a preferred embodiment of the present invention, in described step f), aftertreatment technology comprises surface treatment and whole quenching and the temper of core rod; The surface treatment of core rod is carried out on grinder, and surplus is controlled at 0.1-0.12mm; Hardening heat is controlled at 980 ℃-1000 ℃, cooling in fluid after being incubated 1 hour; Temperature is controlled at 320 ℃-340 ℃, be incubated 2 hours after water-cooled.
The present invention has disclosed a kind of manufacture method of novel die core of wire-drawing die, and this manufacture method procedure arrangement is reasonable, is easy to implement, cost is moderate, the skeleton gasket construction of setting up in core rod, effectively promoted bending resistance, resistance to compression and the antiwear property of core rod, makes the service life of core rod more lasting; Simultaneously, this structure has also effectively strengthened intensity and the precision of nib two-port, makes the drawing process of wire rod more smooth, and the drawing quality is higher.
The accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is the process figure of the manufacture method of the novel die core of wire-drawing die of the embodiment of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention is made to more explicit defining.
Fig. 1 is the process figure of the manufacture method of the novel die core of wire-drawing die of the embodiment of the present invention; This manufacture method comprises the steps: a) to manufacture the skeleton pad, b) preparation core rod material, and c) compacting core rod, the d) sintering of core rod, e) prepare nib, f) core rod post processing.
Embodiment
The concrete preparation process of the manufacture method of the novel die core of wire-drawing die that the present invention mentions is as follows:
A) manufacture the skeleton pad, the material of skeleton pad is diamond, and process equipment is diamond grinders' dop; The linear velocity of emery wheel is controlled at 15-20m/s, and the amount of feeding is 0.05-0.07mm, and cutting fluid is selected mineral oil; The diameter of the skeleton pad made is about 1.2-1.3cm, and thickness is about 4-5mm;
B) preparation core rod material, the main component of core rod material and percentage composition proportioning thereof are: tungsten carbide 50%-55%, titanium carbide 15%-20%, cobalt 10%-12%, molybdenum 3%-3.2%, nickel 1.2%-1.8%, chromium 3.8%-4%, manganese 2.3%-2.5%, all the other are iron; Powder carries out refinement by grinding technics, and the powder size after refinement is about 1-1.5um; Powder evenly mixes in the mix and blend cylinder, and mixture temperature is controlled at 70 ℃-80 ℃, adds appropriate paraffin in the batch mixing process, and mixing time is controlled at 2-2.5 hour;
C) compacting core rod, according to the design feature of core rod, the core rod material is divided into underlying material, middle layered material and top layer material, and every layered material is all divided into groups according to weight; The pressing process of core rod is as follows: at first, lay underlying material the compacting of working pressure machine, pressure is controlled at 30-35t, and the molding thickness of underlying material is about 5mm; Then, lay skeleton pad (lower skeleton) and lay middle layered material, the compacting of working pressure machine, pressure is controlled at 35-40t, and the molding thickness in intermediate layer is about 30-35mm; Finally, lay skeleton pad (upper skeleton) and lay the top layer material, reuse the forcing press compacting, pressure is controlled at 38-42t, and the molding thickness on top layer is about 12-15mm; After core rod is compressing, also need to carry out the techniques such as the demoulding, drying, deburring;
D) sintering of core rod, the sintering operation of core rod carries out in molybdenum wire furnace, and according to the variation of sintering temperature, sintering process can be divided into three phases; First stage, when sintering temperature reaches 600 ℃-800 ℃, be incubated 30 minutes; Second stage, when sintering temperature reaches 1000 ℃-1200 ℃, be incubated 40 minutes; Phase III, when sintering temperature reaches 1440 ℃-1480 ℃, be incubated 50 minutes; In whole sintering process, use hydrogen as protective gas, the core rod after sintering is cooling in a vacuum;
E) prepare nib, adopt pulse laser to carry out nib processing, laser pulse width is 1 millisecond, and the fenestra aperture made is about 1-1.2mm;
F) core rod post processing, aftertreatment technology comprises surface treatment and whole quenching and the temper of core rod; The surface treatment of core rod is carried out on grinder, and surplus is controlled at 0.1-0.12mm, and the surface roughness after grinding is about 6.4um; Hardening heat is controlled at 980 ℃-1000 ℃, cooling in fluid after being incubated 1 hour; Temperature is controlled at 320 ℃-340 ℃, be incubated 2 hours after water-cooled.
The present invention has disclosed a kind of manufacture method of novel die core of wire-drawing die, be characterized in: this manufacture method procedure arrangement is reasonable, be easy to implement, cost is moderate, the skeleton gasket construction of setting up in core rod, effectively promoted bending resistance, resistance to compression and the antiwear property of core rod, made the service life of core rod more lasting; Simultaneously, this structure has also effectively strengthened intensity and the precision of nib two-port, makes the drawing process of wire rod more smooth, and the drawing quality is higher.
The above; it is only the specific embodiment of the present invention; but protection scope of the present invention is not limited to this; any those of ordinary skill in the art are in the disclosed technical scope of the present invention; the variation that can expect without creative work or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claims were limited.
Claims (7)
1. the manufacture method of a novel die core of wire-drawing die, is characterized in that, this manufacture method comprises the steps: a) to manufacture the skeleton pad, b) preparation core rod material, and c) compacting core rod, the d) sintering of core rod, e) prepare nib, f) core rod post processing.
2. the manufacture method of novel die core of wire-drawing die according to claim 1, is characterized in that, in described step a), the material of skeleton pad is diamond, and process equipment is diamond grinders' dop; The diameter of the skeleton pad made is about 1.2-1.3cm, and thickness is about 4-5mm.
3. the manufacture method of novel die core of wire-drawing die according to claim 1, is characterized in that, in described step b), the main component of core rod material is: tungsten carbide, titanium carbide, cobalt, molybdenum, nickel, chromium, manganese and iron; Powder evenly mixes in the mix and blend cylinder, and mixture temperature is controlled at 70 ℃-80 ℃, adds appropriate paraffin in the batch mixing process, and mixing time is controlled at 2-2.5 hour.
4. the manufacture method of novel die core of wire-drawing die according to claim 1, is characterized in that, in described step c), the core rod material is divided into underlying material, middle layered material and top layer material, the pressing process of core rod is as follows: at first, lay underlying material the compacting of working pressure machine, pressure is controlled at 30-35t; Then, lay skeleton pad (lower skeleton) and lay middle layered material, the compacting of working pressure machine, pressure is controlled at 35-40t; Finally, lay skeleton pad (upper skeleton) and lay the top layer material, reuse the forcing press compacting, pressure is controlled at 38-42t; After core rod is compressing, also need to carry out the techniques such as the demoulding, drying, deburring.
5. the manufacture method of novel die core of wire-drawing die according to claim 1, is characterized in that, in described step d), the sintering operation of core rod carries out in molybdenum wire furnace, and sintering process can be divided into three phases; First stage, when sintering temperature reaches 600 ℃-800 ℃, be incubated 30 minutes; Second stage, when sintering temperature reaches 1000 ℃-1200 ℃, be incubated 40 minutes; Phase III, when sintering temperature reaches 1440 ℃-1480 ℃, be incubated 50 minutes; In whole sintering process, use hydrogen as protective gas, the core rod after sintering is cooling in a vacuum.
6. the manufacture method of novel die core of wire-drawing die according to claim 1, is characterized in that, in described step e), adopts pulse laser to carry out nib processing, and laser pulse width is 1 millisecond, and the fenestra aperture made is about 1-1.2mm.
7. the manufacture method of novel die core of wire-drawing die according to claim 1, is characterized in that, in described step f), aftertreatment technology comprises surface treatment and whole quenching and the temper of core rod; The surface treatment of core rod is carried out on grinder, and surplus is controlled at 0.1-0.12mm; Hardening heat is controlled at 980 ℃-1000 ℃, cooling in fluid after being incubated 1 hour; Temperature is controlled at 320 ℃-340 ℃, be incubated 2 hours after water-cooled.
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| CN201310455492.9A CN103480673A (en) | 2013-09-30 | 2013-09-30 | Method for manufacturing novel die core of wire drawing die |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104399982A (en) * | 2014-10-30 | 2015-03-11 | 苏州广型模具有限公司 | Novel preparing method of wire drawing mold core |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104399982A (en) * | 2014-10-30 | 2015-03-11 | 苏州广型模具有限公司 | Novel preparing method of wire drawing mold core |
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Application publication date: 20140101 |