CN1048180A - Drill chuck nut - Google Patents
Drill chuck nut Download PDFInfo
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- CN1048180A CN1048180A CN 89105114 CN89105114A CN1048180A CN 1048180 A CN1048180 A CN 1048180A CN 89105114 CN89105114 CN 89105114 CN 89105114 A CN89105114 A CN 89105114A CN 1048180 A CN1048180 A CN 1048180A
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Abstract
A kind of high carbon steel drill chuck nut and manufacturing process thereof of utilizing powder metallurgical technique to make.The carbon content of nut is 1.0～1.3%, contains the hole of 9～14% volumes, and soaks into a certain amount of lubricating oil in the hole.The drill chuck nut that uses this technology to make, the utilization ratio of material can reach 70%, can greatly reduce the cost of raw material, has promptly improved the mechanical property of component, can play self-lubricating function by nut in the process of using again, prolongs the work-ing life of part effectively.
Description
The present invention is a kind of nut and utilizes powder metallurgy process to make this nut, specifically makes the drill chuck nut of three-jaw drill chuck head.
Drill chuck nut is one of crucial component in rig, and by the pressure clamping drill bit of the fastening drill chuck of drill chuck nut, so its requires to have higher intensity and hardness.Usually, it is material that drill chuck nut all adopts steel alloy, and for example the 50Cr steel is made nut through mechanical workout.In the drill chuck nut installation process, must just can be installed in the drill chuck head becoming whole nut workpiece to be opened into two portions.For preventing that nut produces plastic deformation in the workpiece opening procedure, the drill chuck nut after the precision work must be heat-treated (quenching) increases its hardness and fragility.The common machine-tooled method of this use is made drill chuck nut, and the not only utilization ratio of the alloy steel material that price is more expensive low (about 22%), and processing worker is continuous long.This nut in use also must be oily simultaneously.Another kind of manufacture method is a powder metallurgical technique, takes this technology can simplify the process of drill chuck nut processing, reduces production costs.The drill bit nut is normally by mixing powder, compression moulding, and processing methodes such as sintering and precision work are carried out processing and manufacturing.In powder metallurgical technique, the mixed powder of raw material, the atmosphere that the condition of compression moulding and sintering process can directly influence product performance, particularly sintering process is a procedure more rambunctious.Therefore selecting certain fabrication process condition, is to take powder metallurgical technique to make the key of workpiece.
The objective of the invention is to utilize the common high carbon steel of powder metallurgical technique, replace High Chrome Alloy Steel, make a kind of drill bit nut of excellent property.It not only can economical with materials, simplifies the course of processing, the work-ing life that can improve workpiece again.
Drill chuck nut of the present invention is that high carbon steel is made, and the composition of its high carbon steel material (weight %) is: C:1.0～1.3%; P:0.1～0.3%, all the other are Fe.Contain the superfine micropore in aperture in the nut workpiece that this material is made simultaneously, the volume of its hole accounts for 7～14% of nut volume.This micropore is communicated with mostly, and lubricating oil can be filled in the micropore by soaking into, and its hole that contains lubricating oil accounts for more than 50% of total pore space.For keeping drill chuck nut to contain suitable lubricating oil, can guarantee the intensity of workpiece simultaneously again, its preferable volume of voids should account for 9%～11% of nut volume.
Carbon content in the above-mentioned high carbon steel can directly influence the fragility of the intensity, particularly workpiece of workpiece.Adding carbamate additives for low phosphorus in the material also is in order further to control its fragility.Make the workpiece after the precision work easy when being opened into two, and fracture port is neat, non-plastic deformation.But further increase carbon content (greater than 1.3%) or phosphorus content (greater than 0.2%), though the hard fragility of workpiece increases, the toughness of nut reduces, and it is difficult that its course of processing becomes, and also reduce work-ing life.And reduce carbon content (less than 1.0%), then opposite variation takes place in its performance, also is unfavorable for adopting.Preferable carbon content is (weight %) 1.0～1.1%, and phosphorus content is (weight) 0.2%.
The manufacture method of drill chuck nut of the present invention is to adopt powder metallurgical technique and two processes of mechanical workout.This technology mainly is:
(1) batch mixing: with a certain amount of iron powder, thorough mixing was even after Graphite Powder 99 and ferrophosphorus powder mixed the adding small amount of engine oil;
(2) die mould: be pressed with the batch mixing of 600～800MPa pressure to above-mentioned (1);
(3) sintering: sintering carries out in carbon monoxide or nitrogen atmosphere, and sintering temperature is 1100～1180 ℃, obtains blank through sintering;
(4) immersion oil: (3) are made workpiece blank, carry out immersion oil and handle;
(5) workpiece blank after the processing of (4) immersion oil is carried out precision work.Its mechanical processing process is by known working method, for example car back plane, car box thread, mill operations such as female mouth, cylindrical grinding, face machined flat and process, obtain the finished product drill chuck nut.Certainly mechanical processing process also can be placed on before the immersion oil operation, promptly earlier above-mentioned (3) is handled the blank that obtains and carries out machine finshing, and then carry out immersion oil and handle, and its effect is the same.
In above-mentioned manufacturing process, what should further specify is, moulding for the benefit of adds a spot of Zinic stearas (account for batch mixing weight about 0.5%) in the batch mixing process.Selected suitable pressure is to contain certain hole in order to guarantee in the workpiece of moulding in the pressure-type process, and the too high workpiece density of pressure adds macrovoid and reduces, and increases otherwise pressure reduces hole, simultaneously the strength reduction of workpiece.Can be under 600～800MPa pressure so that the volume of voids in the workpiece accounts for 7～14% of workpiece volume.Pressure is in 650～750MPa scope, and can obtain preferable volume of voids is 9～11%.In the sintering processes, except that will controlling certain sintering temperature, atmosphere (avoiding decarburization in the raw material) and agglomerating time during control sintering that should be strict, generally answer sintering more than 1 hour.In addition, can fully soak in the hole of workpiece for making lubricating oil, the immersion oil process should be carried out under heating, and Heating temperature is 80～100 ℃.Though immersion oil is handled and can normally be carried out under the normal pressure, under reduced pressure help the immersion oil processing lubricating oil is soaked in the hole of workpiece fully.Workpiece contains a certain amount of lubricating oil, not only in that to add man-hour easy, product in use, self-lubricating effect is also remarkable, helps to prolong the work-ing life of workpiece.
Drill chuck nut structure iron of the present invention as shown in Figure 1, 2.Wherein, Fig. 1 is the structure iron of the nut workpiece blank after powder metallurgical technique processing.Fig. 2 is through the drill chuck nut synoptic diagram after the machining.Among Fig. 21, nut; 2, the nut centre joint.
Manufacture method of the present invention further is described by example.
Example
% gets atomization and produces iron powder (100 order) 97.1% by weight, Graphite Powder 99 (200 order) 1.1%, and ferrophosphorus powder (200 order) 1.3%, Zinic stearas 0.5% are put into the blender thorough mixing with small amount of engine oil and are become uniform batch mixing powder.
To the extrusion forming of batch mixing powder, its volume of voids accounts for 9% of workpiece volume with 750MPa pressure, in continuous fritting furnace, with the carbon monoxide anti-atmosphere of going bail for, 1100 ℃ of sintering temperatures 1 hour, cools off in water jacket.
With the workpiece (gauge pressure 760mmHg) in the vacuum oil immersion case of above-mentioned manufacturing, be heated to 100 ℃ of decompression immersion oil 2 hours.The machine finshing that the gained workpiece carries out ordinary method again obtains drill chuck nut.The drill chuck spiral shell is opened into two along the centre joint, can be installed in the drill bit, utilize the utilization ratio of this working method material can reach 70%, contain the lubricating oil of (weight %) about 0.4% in the workpiece.
A kind of improved method of utilizing powder metallurgy technology to make drill chuck nut of the present invention adopts high carbon steel for having got the valuable High Chrome Alloy Steel of price, reduces the cost of raw material, makes material use efficiency can reach 70%.Simultaneously,, add the heat treatment step of promptly having removed common processing man-hour from, guaranteed the quality of product again because workpiece has certain hard fragility.This in addition drill chuck nut can in use can play self-lubricating function owing to contain a certain amount of lubricating oil composition, can prolong the work-ing life of nut again.
Claims (6)
1, a kind of drill chuck nut of high carbon steel material, feature of the present invention are consist of (the weight %) of its high carbon steel:
C:1.0～1.3%, all the other Fe of P:0.1～0.3%.
2, according to the described nut of claim 1, it is characterized in that containing that the aperture is superfine that micropore arranged, the volume of its hole accounts for 7～14% of nut volume.
3, according to claim 1,2 described nuts, it is characterized in that soaking into lubricating oil in the hole, the hole that it contains lubricating oil accounts for more than 50% of total pore space.
4, according to the described nut of claim 2, it is characterized in that preferable hole, volume accounts for 9～11% of nut volume.
5, the manufacture method of the described high carbon steel drill chuck nut of a kind of claim 1 is to adopt powder metallurgy and mechanical workout skill, is characterized in:
(1) batch mixing: with a certain amount of iron powder, add small amount of engine oil in the mixture of Graphite Powder 99 and ferrophosphorus powder after thorough mixing even;
(2) die mould: be pressed with the batch mixing of 600～800MPa pressure to above-mentioned (1);
(3) sintering: sintering carries out in carbon monoxide or nitrogen atmosphere, and sintering temperature is 1100～1180 ℃, obtains blank through sintering;
(4) immersion oil: (3) are made workpiece blank, carry out immersion oil and handle, the workpiece blank behind the immersion oil is carried out machine finshing, also (3) can be made workpiece blank, carry out carrying out the immersion oil processing after the machine finshing.
6, according to the manufacture method of the described nut of claim 5, be characterized in its immersion oil treating processes normal pressure under 80～100 ℃ of temperature or the decompression under carry out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89105114 CN1048180A (en) | 1989-06-23 | 1989-06-23 | Drill chuck nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89105114 CN1048180A (en) | 1989-06-23 | 1989-06-23 | Drill chuck nut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1048180A true CN1048180A (en) | 1991-01-02 |
Family
ID=4855885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89105114 Pending CN1048180A (en) | 1989-06-23 | 1989-06-23 | Drill chuck nut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1048180A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101173714B (en) * | 2006-11-03 | 2010-09-01 | 浙江三花制冷集团有限公司 | Electronic expansion valve |
| CN111706600A (en) * | 2020-06-10 | 2020-09-25 | 侯杰烨 | Oil-containing thread and fastener |
-
1989
- 1989-06-23 CN CN 89105114 patent/CN1048180A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101173714B (en) * | 2006-11-03 | 2010-09-01 | 浙江三花制冷集团有限公司 | Electronic expansion valve |
| CN111706600A (en) * | 2020-06-10 | 2020-09-25 | 侯杰烨 | Oil-containing thread and fastener |
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| C06 | Publication | ||
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |