CN101823193B - Machining technology of slide plate special for passengers - Google Patents
Machining technology of slide plate special for passengers Download PDFInfo
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- CN101823193B CN101823193B CN200910024955XA CN200910024955A CN101823193B CN 101823193 B CN101823193 B CN 101823193B CN 200910024955X A CN200910024955X A CN 200910024955XA CN 200910024955 A CN200910024955 A CN 200910024955A CN 101823193 B CN101823193 B CN 101823193B
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Abstract
The invention relates to a machining technology a slide plate special for passengers. The technology comprises the following steps of: a. selecting a spheroidal graphite cast iron with the ball iron card number of QT400-18L; b. wholly casting a cushioning plate with a furan resin sand casting technology, and controlling the surface roughness to be within Ra50; c. putting a casting part into a furnace to be heated at 730-750 DGE, keeping the temperature for 2-4h, controlling the temperature in the furnace at 580-610 DEG C, withdrawing the casting part, and naturally cooling; d. mechanically machining; and e. compositely treating the surface of the casting part by means of QPQ salt bath. The machining technology wholly molds the slide plate with the spheroidal graphite cast iron, has high integrity, is more obvious in shock absorption effect, has higher abrasive resistance, corrosion resistance and fatigue resistance, easily controls the deformation, has small internal stress and good cutting performance, simplifies various associated dimension chains by wholly casting, and greatly reduces the mechanic machining quantity, thereby having short production period, easily forming into line production, and being suitable for quantity production.
Description
Technical field
The present invention relates to a kind of processing method of track traffic point components, particularly a kind of machining technology of slide plate special for passengers.
Background technology
Current, China is in the economic construction develop rapidly stage, and railway transportation is being undertaken shipping and passenger traffic two big important transportation tasks as the main artery of national economy.Along with the continuous speed-raising of existing line, the improving constantly of newly-built line design speed, particularly building of high-speed railway, train speed will significantly improve.Thereupon, safety of railway transportation just demonstrates its unusual importance, it as track switch one of vitals of railroad track, because characteristics such as it have that quantity is many, complex structure, service life are short, limit train speed, travel safety is low, maintenance has high input, with curve, joint and be called three big weak links of track.
Slide plate special for passengers is a requisite element in the passenger rail rail switch, it in whole length of switch rail scope the support tongue, withhold stock rail, play a part very strong to improving the vehicle operating quality and reducing active force.But, because the slide plate special for passengers shape is comparatively special, the slide plate special for passengers on the present domestic passenger rail rail switch is commonly the steel welding slide plate, promptly by upper and lower two block plates by to around be welded, and the mid portion of two block plates is just fitted, and does not become one.This welding slide plate causes tongue part elasticity relatively poor, easily form the irregularity that the track structure rail vertically reaches lateral stiffness, when train by the time cause shock and vibration strong between wheel track, thereby aggravated the dynamic action between wheel and tongue and tongue and the backing plate, worsened the condition of work of track switch, weldment in actual use, high-frequency vibrations, easily cause weld to produce the sealing-off phenomenon, cause the shortening in service life of track switch part parts, also injure the traffic safety of train when serious.In addition, the steel welding slide plate causes working (machining) efficiency lower owing to problems such as welding deformation control difficulty are big, and the workpiece difficulty of processing is big, and production cost is higher.
Summary of the invention
The object of the present invention is to provide the machining technology of slide plate special for passengers that a kind of globality is strong, damping property good, working (machining) efficiency is high, production cost is low.
The technical scheme that realizes the object of the invention is: a kind of machining technology of slide plate special for passengers, adopt the following step:
A, to select the magnesium iron trade mark for use be QT400-18L, tensile strength is more than 400MP, yield strength is more than 250MP, percentage elongation surpasses 18%, the room temperature impact toughness reaches the spheroidal graphite cast-iron of 14J/cm2, represent that with mass percent its composition is: carbon: 3.6～3.8%, phosphorus≤0.06%, silicon: 1.8～2.1%, sulphur: manganese≤0.02%: titanium≤0.15% :≤0.04%, all the other are Fe;
B, employing furan resin-sand casting technique are carried out monoblock cast to backing plate, and Roughness Surface on Control is in Ra50;
C, foundry goods is put into stove be heated to 730 ℃～750 ℃, keep temperature control the interior temperature to 580 of stove ℃～610 ℃ after 2～4 hours, take out foundry goods afterwards and cool off naturally;
Whether d, check foundry goods appearance and size conform with the drawing requirement, and the check presentation quality has or not casting flaw;
Plane (2) on e, milling baseplane (1) and the platen;
Step (3) and chamfering around f, the processing;
G, processing bolts at two ends hole (4), the aperture chamfering;
H, milling platen lower plane (5);
The strong point (6) and fabrication hole (7) are suppressed in i, processing;
J, processing inclined-plane (8);
K, deburring;
L, cast(ing) surface QPQ salt bath Combined Processing.
When adopting the casting of furan resin-sand casting technique among the step b of above-mentioned machining technology of slide plate special for passengers, place the foamed ceramics filter screen in the sprue bottom, rising head adopts insulated feeder;
Among the step c of above-mentioned machining technology of slide plate special for passengers, foundry goods is put into stove and is heated to 740 ℃, keeps temperature control the interior temperature to 600 of stove ℃ after 3 hours, takes out foundry goods afterwards and cools off naturally.
The present invention has following characteristics: the present invention has following characteristics: (1) the present invention adopts technique for integral casting, and the slide plate globality is strong, and distortion is easy to control, and internal stress is little; (2) the present invention adopts plasticity and the higher spheroidal graphite cast-iron of toughness, and damping effect is more obvious, and cutting ability is better, and is easy to process; (3) QPQ salt bath Combined Processing is carried out on slide plate of the present invention surface, multiple element infiltrates the metal surface simultaneously, the compisite seeping layer that formation is made up of several compounds makes the metal surface modification that strengthened, and wearability, corrosion stability and fatigue durability are greatly improved simultaneously; (4) the present invention adopts the furan resin-sand casting technique, can effectively control backing plate casting dimension and surface roughness; Place the foamed ceramics filter screen in sprue bottom, can filter bits and bubble in the molten iron, guarantee to enter the cleannes of the molten iron of foundry goods die cavity, prevent that effectively defectives such as cinder hole, pore from appearring in the inner and surface of foundry goods; Insulated feeder has stronger feeding effect, and it improves feeding capacity 20-30% than the common rising head of equal volume, has not only guaranteed product quality but also can save a large amount of molten iron that comprehensive benefit is obvious.(5) the present invention has simplified various related dimension chains by monoblock cast, and machining amount significantly reduces, and is therefore with short production cycle, is easy to form continuous productive process, is suitable for producing in batches.
Description of drawings
For the easier quilt of content of the present invention is clearly understood, below the specific embodiment and in conjunction with the accompanying drawings of basis, the present invention is further detailed explanation, wherein
Fig. 1 is a slide plate special for passengers upward view of the present invention;
Fig. 2 is an A-A cutaway view among Fig. 1;
Fig. 3 is a slide plate special for passengers vertical view of the present invention.
The specific embodiment
The present invention is a kind of machining technology of slide plate special for passengers, adopts the following step:
A, to select the magnesium iron trade mark for use be QT400-18L, tensile strength is more than 400MP, yield strength is more than 250MP, percentage elongation surpasses 18%, the room temperature impact toughness reaches the spheroidal graphite cast-iron of 14J/cm2, represent that with mass percent its composition is: carbon: 3.6～3.8%, phosphorus≤0.06%, silicon: 1.8～2.1%, sulphur: manganese≤0.02%: titanium≤0.15% :≤0.04%, all the other are Fe;
B, employing furan resin-sand casting technique are carried out monoblock cast to backing plate, and are placed the foamed ceramics filter screen in the sprue bottom, and rising head adopts insulated feeder, and Roughness Surface on Control is in Ra50; Higher to the dimensional requirement and the surface requirements of cast blank because of integral-casting spherical iron base plate, common tide mould sand casting technique is difficult to guarantee the quality of product, so select the furan resin-sand casting technique for use;
C, foundry goods is put into stove be heated to 740 ℃, keep temperature control the interior temperature to 600 of stove ℃ after 3 hours, take out foundry goods afterwards and cool off naturally;
Whether d, check foundry goods appearance and size conform with the drawing requirement, and the check presentation quality has or not casting flaw;
Plane (2) on e, milling baseplane (1) and the platen;
Step (3) and chamfering around f, the processing;
G, processing bolts at two ends hole (4), the aperture chamfering;
H, milling platen lower plane (5);
I, the processed springs strong point (6) and fabrication hole (7);
J, processing inclined-plane (8);
K, deburring;
L, slide plate surface QPQ salt bath Combined Processing, QPQ salt bath Combined Processing is a kind of advanced person's a metal fused salt surface reinforcement modifying technology, to be operated in two kinds of fusion saline solutions of different nature and successively handle, make multiple element infiltrate the metal surface simultaneously, the compisite seeping layer that formation is made up of several compounds, make the metal surface modification that strengthened, wearability, corrosion stability and fatigue durability are greatly improved simultaneously.It usually is used for replacing the conventional heat treatment and the surface strengthening technologies such as quenching of carburizing and quenching, high-frequency quenching, glow discharge nitriding, tufftride, modified, easily deformed part, to improve metal skin hardness and wear-resisting, fatigue performance, particularly with solving a hardening deforming difficult problem.Can be used to replace turn blue, hard chrome plating, decorative chromium plating, nickel plating, zinc-plated, sulfuration, etc. conventional process of surface treatment, significantly improve the corrosion stability of part, reduce production costs greatly.
Obviously, the above embodiment of the present invention only is for example of the present invention clearly is described, and is not to be qualification to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all embodiments.And these belong to conspicuous variation or the change that spirit of the present invention extended out and still are among protection scope of the present invention.
Claims (3)
1. machining technology of slide plate special for passengers is characterized in that: adopt the following step:
A, to select the magnesium iron trade mark for use be QT400-18L, and tensile strength is more than 400MPa, and yield strength is more than 250MPa, and percentage elongation surpasses 18%, and the room temperature impact toughness reaches 14J/cm
2Spheroidal graphite cast-iron, represent that with mass percent its composition is: carbon: 3.6～3.8%, phosphorus≤0.06%, silicon: 1.8～2.1%, sulphur: manganese≤0.02%: titanium≤0.15% :≤0.04%, all the other are Fe;
B, employing furan resin-sand casting technique are carried out monoblock cast to backing plate, and Roughness Surface on Control is in Ra50;
C, foundry goods is put into stove be heated to 730 ℃～750 ℃, keep temperature control the interior temperature to 580 of stove ℃～610 ℃ after 2～4 hours, take out foundry goods afterwards and cool off naturally;
Whether d, check foundry goods appearance and size conform with the drawing requirement, and the check presentation quality has or not casting flaw;
Plane (2) on e, milling baseplane (1) and the platen;
Step (3) and chamfering around f, the processing;
G, processing bolts at two ends hole (4), the aperture chamfering;
H, milling platen lower plane (5);
The strong point (6) and fabrication hole (7) are suppressed in i, processing;
J, processing inclined-plane (8);
K, deburring;
L, cast(ing) surface QPQ salt bath Combined Processing.
2. machining technology of slide plate special for passengers according to claim 1 is characterized in that: when adopting the casting of furan resin-sand casting technique among the described step b, place the foamed ceramics filter screen in the sprue bottom, rising head adopts insulated feeder.
3. machining technology of slide plate special for passengers according to claim 1 is characterized in that: among the described processing step c, foundry goods is put into stove and is heated to 740 ℃, keeps temperature control the interior temperature to 600 of stove ℃ after 3 hours, takes out foundry goods afterwards and cools off naturally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910024955XA CN101823193B (en) | 2009-03-03 | 2009-03-03 | Machining technology of slide plate special for passengers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910024955XA CN101823193B (en) | 2009-03-03 | 2009-03-03 | Machining technology of slide plate special for passengers |
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| Publication Number | Publication Date |
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| CN101823193A CN101823193A (en) | 2010-09-08 |
| CN101823193B true CN101823193B (en) | 2011-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910024955XA Expired - Fee Related CN101823193B (en) | 2009-03-03 | 2009-03-03 | Machining technology of slide plate special for passengers |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102259162A (en) * | 2010-11-03 | 2011-11-30 | 鞍钢集团矿业公司 | Moulding method in casting technology of railway plate |
| CN102228956B (en) * | 2011-07-11 | 2013-05-22 | 宝鸡中铁宝桥天元实业发展有限公司 | Precision fire mould casting process of series sliding bed bedplates for turnouts of high-speed railway lines for passenger transport and special die |
| CN103100827B (en) * | 2013-02-06 | 2016-08-24 | 科瑞自动化技术（苏州）有限公司 | The manufacture method of hard disc production line HALO |
| CN109778110A (en) * | 2018-12-27 | 2019-05-21 | 陕西铁马铸锻有限公司 | A kind of anticorrosion antiwear slider bed platform slide plate and treatment process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1167858A (en) * | 1997-05-07 | 1997-12-17 | 铁道部山海关桥梁工厂 | Forgeable cast iron switch bed plate and mfg. method thereof |
| US5964272A (en) * | 1997-12-08 | 1999-10-12 | Amsted Industries Incorporated | Wheel cooling tunnel |
| CN101352800A (en) * | 2008-09-10 | 2009-01-28 | 南京高精船用设备有限公司 | Technique for processing oil distribution sleeve in adjustable windstick distributor for marine |
-
2009
- 2009-03-03 CN CN200910024955XA patent/CN101823193B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1167858A (en) * | 1997-05-07 | 1997-12-17 | 铁道部山海关桥梁工厂 | Forgeable cast iron switch bed plate and mfg. method thereof |
| US5964272A (en) * | 1997-12-08 | 1999-10-12 | Amsted Industries Incorporated | Wheel cooling tunnel |
| CN101352800A (en) * | 2008-09-10 | 2009-01-28 | 南京高精船用设备有限公司 | Technique for processing oil distribution sleeve in adjustable windstick distributor for marine |
Non-Patent Citations (3)
| Title |
|---|
| 王阿利,费维周.提速道岔用改进型滑床板的结构研究.《铁道工程学报》.2008,(第3期),15-19. * |
| 袁宝军,费维周.时速250km客运专线铁路60kg/m钢轨18号单开道岔制造工艺.《铁道标准设计》.2006,179-181. * |
| 铁道部第三设计院.道岔设计手册.《道岔设计手册》.人民铁道出版社,1975, * |
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Granted publication date: 20110720 Termination date: 20160303 |