CN102581563A - Machining process of hydraulic multi-tandem slide valves - Google Patents
Machining process of hydraulic multi-tandem slide valves Download PDFInfo
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- CN102581563A CN102581563A CN2012100546469A CN201210054646A CN102581563A CN 102581563 A CN102581563 A CN 102581563A CN 2012100546469 A CN2012100546469 A CN 2012100546469A CN 201210054646 A CN201210054646 A CN 201210054646A CN 102581563 A CN102581563 A CN 102581563A
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Abstract
The invention provides a machining process of hydraulic multi-tandem slide vales, which comprises a part made of structural alloy steel 38CrMoAl. The machining process of the part includes: feeding automatically through an automatic numerical-control turning and milling combined lathe, connecting two spindles automatically, performing combined all-dimensional machining of a three-cutter tower by any angle, nitriding, grinding and polishing. The machining process of the hydraulic multi-tandem slide valves overcomes conventional machining defects, integral machining of complicated parts of the slide valves is realized by modern high-precision equipment and technology, and efficiency is improved, cost is reduced and quality of the parts is guaranteed.
Description
Technical field
The present invention relates to hydraulic multitandem valve, specifically a kind of processing technology of hydraulic multitandem valve guiding valve.
Background technology
The hydraulic multitandem valve guiding valve is one of most crucial part of hydraulic multitandem valve; Claim the throttling channel guiding valve again; Arrange difform throttling channel and combination thereof at spool exactly; Obtain easily little regime flow, flow adjustment range is wide, satisfies under the different operating modes engineering machinery hydraulic executing agency to the requirement of movement velocity.Thereby the processing of guiding valve seems particularly important, and the precision of processing directly influences the spool displacement indicatrix, just the exercise performance of engineering machinery.Hydraulic multitandem valve guiding valve part cylindrical precision is 0.0015mm for-0.003/-0.008mm, cylindricity, and interior hole depth and precision are that 0-0.011mm, cylindricity are 0.003mm, and the radial hole of circle distribution is many and not of uniform size; Cannelure is many, and axial groove distributes extensively, and traditional guiding valve adopts the 40Cr material; Because quenching distortion; Cannelure is deep mixed after causing grinding, so also can produce the radial load imbalance and cause hydraulic lock, and conventional cutting process needs the multiple clamping location and is difficult to guarantee crudy; Processing hydraulic banked direction control valves guiding valve is very difficult; For this reason, according to guiding valve design of part characteristics and functional requirement, the complete processing technology scheme that formulation is chosen finished product from material seems very necessary.
In view of this, to the problems referred to above, propose a kind of reasonable in design and effectively improve the processing technology of the hydraulic multitandem valve guiding valve of above-mentioned disappearance.
Summary of the invention
The object of the present invention is to provide a kind of processing technology of hydraulic multitandem valve guiding valve; Overcome traditional manufacturing deficiency; Utilize modern high precise equipment and technology, realized the process program of the complete processing of complicated guiding valve part, thereby reach the purpose of raising the efficiency, reduce cost, guarantee part quality.
The object of the invention can be realized through following technical measures:
This processing technology is carried out as follows:
A. adopt structural alloy steel 38CrMoAl as the needed raw material of addition hydraulic multitandem valve guiding valve and through the automatic complex milling machine tool automatic charging of numerical control;
B. two main shafts of the automatic complex milling machine tool of numerical control join automatically, the comprehensive arbitrarily angled Compound Machining of San Daota;
C. the semi-finished product to the hydraulic multitandem valve guiding valve after the above-mentioned processing carry out nitrogen treatment;
D. the hydraulic multitandem valve guiding valve of via nitride being handled carries out grinding;
E. use light polishing machine that guiding valve is carried out autogenous grinding after grinding is accomplished and remove burr.
The object of the invention also can be realized through following technical measures:
The described Compound Machining of above-mentioned b step is to use this combined machine to process cylindrical to raw material earlier; Adopt collet to guarantee two working axialities; Processing inside is along the endoporus of axis direction then; Adopt the deep hole drill gun to guarantee the endoporus precision, process various chamferings and the connection endoporus of various cannelures and cannelure corner more to foreign round and perpendicular to a plurality of oilholes of guiding valve axis.
The described nitrogen treatment of above-mentioned c step is to clean with the semi-finished product of agent for carbon hydrogen detergent to guiding valve earlier; Under 330-380 ℃ of temperature, pack into after pre-oxidation 40-50 minute again in the nitriding furnace; Be warming up to 480-520 ℃ in 3 hours, be incubated 14-16 hour, NH
3Flow is 35-130L/min; And then use agent for carbon hydrogen detergent to clean.
The described grinding of above-mentioned d step is that the cannelure of with centerless grinder guiding valve excircle of workpiece and cylindrical being offered earlier carries out grinding with the various chamferings of cannelure corner, grinds endoporus and oilhole with the circle plover mill machine again.
It is the burr of removing guiding valve cylindrical cannelure control flume sharp corner wherein that burr is removed in the said autogenous grinding of above-mentioned e step.
The needed raw material of addition hydraulic multitandem valve guiding valve are wanted in said selection, are specially and select the 38CrMoAl structural alloy steel for use, and its chemical composition meets the requirement of GB/T3077; The steel condition of delivery that structural alloy steel is used for nitrogenize, tufftride part is that heat treatment is promptly quenched+state of high tempering; Mechanical property is tensile strength Rm>=980N/mm
2, yield strength Rel>=835MPa, section percentage elongation A>=14%, contraction percentage of area Z>=50%, impact absorbing energy Ak>=71J; Delivery hardness HRC30～36, single bar hardness permissible variation≤HRC3; Metallographic structure is amplified 500 times at microscopically, evaluates with reference to original structure rank figure and selects the 1-2 level; The diameter permissible variation of bohler is by the h8 requirement among the GB/3207, and glacing flatness requires to be maximum 0.1mm/m.
Two main shafts of the automatic complex milling machine tool of said numerical control join automatically, San Daota is comprehensive arbitrarily angled to choosing and mounted raw material Compound Machining; Be specially and use this lathe to process cylindrical to raw material; Cylindrical is machined to φ 28.15mm; Axiality is 0.03mm, adopts collet to guarantee two working axialities; Processing inside is along the endoporus of axis direction then, and endoporus is machined to φ 16.95mm, and axiality 0.03mm adopts the deep hole drill gun to guarantee the endoporus precision; Then the raw-material cylindrical that will be processed into guiding valve is processed the various chamferings that various cannelures are processed cannelure corner simultaneously, guiding valve raw material cylindrical processing is communicated with endoporus and perpendicular to a plurality of oilholes of guiding valve axis.
Said semi-finished product to the hydraulic multitandem valve guiding valve after the above-mentioned processing carry out nitrogen treatment, are specially to use VCH-1000 type cleaning machine to cooperate agent for carbon hydrogen detergent that the semi-finished product of guiding valve are cleaned; Adopt BBN-1000 type oxidation furnace with the pre-oxidation 45 minutes under 350 ℃ of temperature of the semi-finished product of guiding valve; The semi-finished product workpiece of the guiding valve after the pre-oxidation is packed in the nitriding furnace, be warming up to 500 ℃ in 3 hours, be incubated 15 hours, the NH3 flow is 35-130L/min; The semi-finished product workpiece of the guiding valve after the above-mentioned oxidation is reused VCH-1000 type cleaning machine cooperates agent for carbon hydrogen detergent to clean case hardness HV950-1100, centre hardness HRC30-36, nitride layer depth 0.3-0.5mm after the workpiece nitrogenize after the cleaning.
Said to carrying out grinding process behind its nitrogen treatment again, be specially and adopt KRONSONM400 type centerless grinder to carry out the cannelure that guiding valve excircle of workpiece and cylindrical are offered is carried out grinding, the mill amount of staying is divided three grindings; Adopt SL-7 type plover mill machine mill endoporus.
Use light polishing machine matching standard abrasive material that guiding valve is carried out autogenous grinding after said grinding process is accomplished and remove burr, be specially the burr of the guiding valve cylindrical cannelure control flume sharp corner wherein of removal.
Compared to prior art; The present invention includes being chosen as of part material: structural alloy steel 38CrMoAl; Parts machining process is: automatic complex milling machine tool automatic charging → two main shafts join automatically, the comprehensive arbitrarily angled Compound Machining → nitrogen treatment of San Daota → grinding → light decorations through numerical control; The present invention has overcome traditional manufacturing deficiency; Utilize modern high precise equipment and technology, realized the process program of the complete processing of complicated guiding valve part, thereby reach the purpose of raising the efficiency, reduce cost, guarantee part quality.
Description of drawings:
Fig. 1 is the structural representation of a kind of hydraulic multitandem valve guiding valve of the present invention;
Fig. 2 is the H-H profile of Fig. 1;
Fig. 3 is the A-A profile of Fig. 2;
Fig. 4 is the B-B profile of Fig. 2;
Fig. 5 is the C-C profile of Fig. 2;
Fig. 6 is the D-D profile of Fig. 2;
Fig. 7 is the G-G profile of Fig. 2;
Fig. 8 is the L-L profile of Fig. 2;
Fig. 9 is the II place enlarged drawing of Fig. 2;
Figure 10 is the VII place enlarged drawing of Fig. 2.
The specific embodiment:
Relevant detailed description of the present invention and technology contents, conjunction with figs. are explained as follows, yet accompanying drawing only provides the usefulness of reference with explanation, are not to be used for the present invention is limited.
Embodiment 1:
A kind of processing technology of hydraulic multitandem valve guiding valve, its step is following:
Select to want the needed raw material of addition hydraulic multitandem valve guiding valve; Be specially and select the 38CrMoAl structural alloy steel for use, its chemical composition meets the requirement of GB/T3077; The steel condition of delivery that structural alloy steel is used for nitrogenize, tufftride part is that heat treatment is promptly quenched+state of high tempering; Mechanical property is tensile strength Rm=980N/mm
2, yield strength Rel=835MPa, section percentage elongation A=14%, contraction percentage of area Z=50%, impact absorbing energy Ak=71J; The single bar hardness of delivery hardness HRC30=permissible variation=HRC3; Metallographic structure is amplified 500 times at microscopically, evaluates with reference to original structure rank figure and selects 1 grade; The diameter permissible variation of bohler is by the h8 requirement among the GB/3207, and glacing flatness requires to be maximum 0.1mm/m.
Pass through the automatic complex milling machine tool automatic charging of the lucky sprint65 type numerical control of horse to the raw material of choosing;
Two main shafts of the automatic complex milling machine tool of numerical control join automatically, San Daota is comprehensive arbitrarily angled to choosing and mounted raw material Compound Machining; Be specially and adopt the automatic complex milling machine tool of DMG sprint65 numerical control; Can realize that two main shafts join automatically, the comprehensive arbitrarily angled processing of San Daota; Cutter adopts the international well-known producer of mountain top grade, and accessory size is concrete to be controlled as follows: use this lathe to process cylindrical to raw material, cylindrical is machined to φ 28.15mm; Axiality is 0.03mm, adopts collet to guarantee two working axialities; Processing inside is along the endoporus of axis direction then, and endoporus is machined to φ 16.95mm, and axiality 0.03mm adopts the deep hole drill gun to guarantee the endoporus precision; Then the raw-material cylindrical that will be processed into guiding valve is processed the various chamferings that various cannelures are processed cannelure corner simultaneously, guiding valve raw material cylindrical processing is communicated with endoporus and perpendicular to a plurality of oilholes of guiding valve axis.As depicted in figs. 1 and 2, to decide according to actual conditions as for being processed into which kind of size, no matter but be processed into which kind of size, all in protection scope of the present invention.
Semi-finished product to the hydraulic multitandem valve guiding valve after the above-mentioned processing carry out nitrogen treatment; Be specially and use VCH-1000 type cleaning machine to cooperate agent for carbon hydrogen detergent that the semi-finished product of guiding valve are cleaned; Adopt BBN-1000 type oxidation furnace with the pre-oxidation 45 minutes under 350 ℃ of temperature of the semi-finished product of guiding valve; The semi-finished product workpiece of the guiding valve after the pre-oxidation is packed in the nitriding furnace, be warming up to 500 ℃ in 3 hours, be incubated 15 hours, the NH3 flow is 35L/min; The semi-finished product workpiece of the guiding valve after the above-mentioned oxidation is reused VCH-1000 type cleaning machine cooperates agent for carbon hydrogen detergent to clean case hardness HV950, centre hardness HRC30, nitride layer depth 0.3mm after the workpiece nitrogenize after the cleaning.
To carrying out grinding process behind its nitrogen treatment again; Be specially and adopt KRONSONM400 type centerless grinder to carry out the cannelure that guiding valve excircle of workpiece and cylindrical are offered is carried out grinding, the mill amount of staying is divided three grindings; Adopt SL-7 type plover mill machine mill endoporus.Use light polishing machine matching standard abrasive material that guiding valve is carried out autogenous grinding after grinding process is accomplished and remove burr.Be specially the burr of the guiding valve cylindrical cannelure control flume sharp corner wherein of removal.To shown in Figure 10, it is fixed that the size of same above-mentioned two operations will be come according to actual conditions like Fig. 1, no matter but be processed into which kind of size, all in protection scope of the present invention.
Embodiment 2:
A kind of processing technology of hydraulic multitandem valve guiding valve, its step is following:
Select to want the needed raw material of addition hydraulic multitandem valve guiding valve; Be specially and select the 38CrMoAl structural alloy steel for use, its chemical composition meets the requirement of GB/T3077; The steel condition of delivery that structural alloy steel is used for nitrogenize, tufftride part is that heat treatment is promptly quenched+state of high tempering; Mechanical property is tensile strength Rm=1080N/mm
2, yield strength Rel=935MPa, section percentage elongation A=16%, contraction percentage of area Z=60%, impact absorbing energy Ak=81J; Delivery hardness HRC36, single bar hardness permissible variation=HRC3; Metallographic structure is amplified 500 times at microscopically, evaluates with reference to original structure rank figure and selects 2 grades; The diameter permissible variation of bohler is by the h8 requirement among the GB/3207, and glacing flatness requires to be maximum 0.1mm/m.
Pass through the automatic complex milling machine tool automatic charging of the lucky sprint65 type numerical control of horse to the raw material of choosing;
Two main shafts of the automatic complex milling machine tool of numerical control join automatically, San Daota is comprehensive arbitrarily angled to choosing and mounted raw material Compound Machining; Be specially and adopt the automatic complex milling machine tool of DMG sprint65 numerical control; Can realize that two main shafts join automatically, the comprehensive arbitrarily angled processing of San Daota; Cutter adopts the international well-known producer of mountain top grade, and accessory size is concrete to be controlled as follows: use this lathe to process cylindrical to raw material, cylindrical is machined to φ 28.15mm; Axiality is 0.03mm, adopts collet to guarantee two working axialities; Processing inside is along the endoporus of axis direction then, and endoporus is machined to φ 16.95mm, and axiality 0.03mm adopts the deep hole drill gun to guarantee the endoporus precision; Then the raw-material cylindrical that will be processed into guiding valve is processed the various chamferings that various cannelures are processed cannelure corner simultaneously, guiding valve raw material cylindrical processing is communicated with endoporus and perpendicular to a plurality of oilholes of guiding valve axis.As depicted in figs. 1 and 2, to decide according to actual conditions as for being processed into which kind of size, no matter but be processed into which kind of size, all in protection scope of the present invention.
Semi-finished product to the hydraulic multitandem valve guiding valve after the above-mentioned processing carry out nitrogen treatment; Be specially and use VCH-1000 type cleaning machine to cooperate agent for carbon hydrogen detergent that the semi-finished product of guiding valve are cleaned; Adopt BBN-1000 type oxidation furnace with the pre-oxidation 45 minutes under 350 ℃ of temperature of the semi-finished product of guiding valve; The semi-finished product workpiece of the guiding valve after the pre-oxidation is packed in the nitriding furnace, be warming up to 500 ℃ in 3 hours, be incubated 15 hours, the NH3 flow is 130L/min; The semi-finished product workpiece of the guiding valve after the above-mentioned oxidation is reused VCH-1000 type cleaning machine cooperates agent for carbon hydrogen detergent to clean case hardness HV1100, centre hardness HRC36, nitride layer depth 0.5mm after the workpiece nitrogenize after the cleaning.
To carrying out grinding process behind its nitrogen treatment again; Be specially and adopt KRONSONM400 type centerless grinder to carry out the cannelure that guiding valve excircle of workpiece and cylindrical are offered is carried out grinding, the mill amount of staying is divided three grindings; Adopt SL-7 type plover mill machine mill endoporus.Use light polishing machine matching standard abrasive material that guiding valve is carried out autogenous grinding after grinding process is accomplished and remove burr.Be specially the burr of the guiding valve cylindrical cannelure control flume sharp corner wherein of removal.To shown in Figure 10, it is fixed that the size of same above-mentioned two operations will be come according to actual conditions like Fig. 1, no matter but be processed into which kind of size, all in protection scope of the present invention.
The above is merely preferred embodiment of the present invention, and non-in order to limit claim of the present invention, other use the equivalence of patent spirit of the present invention to change, and all should all belong to claim of the present invention.
Claims (5)
1. the processing technology of a hydraulic multitandem valve guiding valve is characterized in that this processing technology carries out as follows:
A. adopt structural alloy steel 38CrMoAl as the needed raw material of addition hydraulic multitandem valve guiding valve and through the automatic complex milling machine tool automatic charging of numerical control;
B. two main shafts of the automatic complex milling machine tool of numerical control join automatically, the comprehensive arbitrarily angled Compound Machining of San Daota;
C. the semi-finished product to the hydraulic multitandem valve guiding valve after the above-mentioned processing carry out nitrogen treatment;
D. the hydraulic multitandem valve guiding valve of via nitride being handled carries out grinding;
E. use light polishing machine that guiding valve is carried out autogenous grinding after grinding is accomplished and remove burr.
2. the processing technology of a kind of hydraulic multitandem valve guiding valve according to claim 1; It is characterized in that the described Compound Machining of b step is to use this combined machine to process cylindrical to raw material earlier; Adopt collet to guarantee two working axialities; The inner endoporus along axis direction of processing adopts the deep hole drill gun to guarantee the endoporus precision then, processes various chamferings and the connection endoporus of various cannelures and cannelure corner more to foreign round and perpendicular to a plurality of oilholes of guiding valve axis.
3. the processing technology of a kind of hydraulic multitandem valve guiding valve according to claim 1; It is characterized in that the described nitrogen treatment of c step is to clean with the semi-finished product of agent for carbon hydrogen detergent to guiding valve earlier; Under 330-380 ℃ of temperature, pack into after pre-oxidation 40-50 minute again in the nitriding furnace; Be warming up to 480-520 ℃ in 3 hours, be incubated 14-16 hour, NH
3Flow is 35-130L/min; And then use agent for carbon hydrogen detergent to clean.
4. the processing technology of a kind of hydraulic multitandem valve guiding valve according to claim 1; It is characterized in that the described grinding of d step is that the cannelure of with centerless grinder guiding valve excircle of workpiece and cylindrical being offered earlier carries out grinding with the various chamferings of cannelure corner, grinds endoporus and oilhole with the circle plover mill machine again.
5. the processing technology of a kind of hydraulic multitandem valve guiding valve according to claim 1 is characterized in that it is the burr of removing guiding valve cylindrical cannelure control flume sharp corner wherein that burr is removed in the said autogenous grinding of e step.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100546469A CN102581563A (en) | 2012-03-05 | 2012-03-05 | Machining process of hydraulic multi-tandem slide valves |
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| CN2012100546469A CN102581563A (en) | 2012-03-05 | 2012-03-05 | Machining process of hydraulic multi-tandem slide valves |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111331320A (en) * | 2020-03-19 | 2020-06-26 | 无锡鹰贝精密轴承有限公司 | High-precision valve element and preparation method and application thereof |
| CN111390499A (en) * | 2020-03-19 | 2020-07-10 | 无锡鹰贝精密轴承有限公司 | High-precision induction high-frequency deep-hole valve core and preparation method thereof |
| CN111468891A (en) * | 2020-03-17 | 2020-07-31 | 无锡鹰贝精密轴承有限公司 | Production process of high-precision deep-hole valve element |
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| CN1266106A (en) * | 1999-12-02 | 2000-09-13 | 方大集团股份有限公司 | Pre-oxidation permeation-promoting high-temp short-time nitridizing technology |
| CN1554858A (en) * | 2003-12-26 | 2004-12-15 | 东方汽轮机厂 | Valve rod for turbine valve and its heat treatment method |
| CN201180812Y (en) * | 2008-02-20 | 2009-01-14 | 济南液压泵有限责任公司 | Three-position slide valve lever for integral manual multiport valve |
| CN101886241A (en) * | 2009-05-14 | 2010-11-17 | 上海纳铁福传动轴有限公司 | Heat treatment nitridation technology for metal |
| CN201753715U (en) * | 2010-07-23 | 2011-03-02 | 浙江苏强格液压有限公司 | Slide valve rod used for multi-way valve |
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2012
- 2012-03-05 CN CN2012100546469A patent/CN102581563A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1266106A (en) * | 1999-12-02 | 2000-09-13 | 方大集团股份有限公司 | Pre-oxidation permeation-promoting high-temp short-time nitridizing technology |
| CN1554858A (en) * | 2003-12-26 | 2004-12-15 | 东方汽轮机厂 | Valve rod for turbine valve and its heat treatment method |
| CN201180812Y (en) * | 2008-02-20 | 2009-01-14 | 济南液压泵有限责任公司 | Three-position slide valve lever for integral manual multiport valve |
| CN101886241A (en) * | 2009-05-14 | 2010-11-17 | 上海纳铁福传动轴有限公司 | Heat treatment nitridation technology for metal |
| CN201753715U (en) * | 2010-07-23 | 2011-03-02 | 浙江苏强格液压有限公司 | Slide valve rod used for multi-way valve |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111468891A (en) * | 2020-03-17 | 2020-07-31 | 无锡鹰贝精密轴承有限公司 | Production process of high-precision deep-hole valve element |
| CN111468891B (en) * | 2020-03-17 | 2021-10-19 | 无锡鹰贝精密液压有限公司 | Production process of high-precision deep-hole valve element |
| CN111331320A (en) * | 2020-03-19 | 2020-06-26 | 无锡鹰贝精密轴承有限公司 | High-precision valve element and preparation method and application thereof |
| CN111390499A (en) * | 2020-03-19 | 2020-07-10 | 无锡鹰贝精密轴承有限公司 | High-precision induction high-frequency deep-hole valve core and preparation method thereof |
| CN111331320B (en) * | 2020-03-19 | 2022-02-15 | 无锡鹰贝精密液压有限公司 | High-precision valve element and preparation method and application thereof |
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Application publication date: 20120718 |