CN102069150B - Method for casting ultra-large multi-blade rotor and adjusting tool - Google Patents
Method for casting ultra-large multi-blade rotor and adjusting tool Download PDFInfo
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- CN102069150B CN102069150B CN201110030464A CN201110030464A CN102069150B CN 102069150 B CN102069150 B CN 102069150B CN 201110030464 A CN201110030464 A CN 201110030464A CN 201110030464 A CN201110030464 A CN 201110030464A CN 102069150 B CN102069150 B CN 102069150B
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Abstract
The invention relates to an adjusting tool. In the adjusting tool, a cross rod is arranged on a bracket; at least one adjusting rod is arranged on the cross rod through a pin shaft; and the upper end of the adjusting rod is moveably connected with a scale. A method for casting an ultra-large multi-blade rotor by using the adjusting tool comprises the following steps of: 1) placing cold iron on the thick and large part of the blade rotor and setting a riser on the top of a cavity, wherein the whole blade part faces downwards; 2) manufacturing blade sand cores; 3) assembling the cores to ensure the blade sand cores on the same circumference by using the adjusting tool; 4) performing mould assembling; and 5) pouring to obtain the ultra-large multi-blade rotor with qualified dimensional precision. By the hydraulic dynamometer blade rotor manufactured by the method, requirements of materials on mechanical properties are met; and requirements of a design company on the assembling technique of the blade rotor are met. By the adjusting tool, dimensional precision of the blade rotor is guaranteed; assembling effect is good and using performance is high; and working efficiency is improved.
Description
Technical field
The present invention relates to a kind of casting method of complicated shape foundry goods, particularly a kind of casting method of ultra-large type multiple-blade rotor and adjustment frock.
Background technology
Rotor is one of critical component of hydraulic dynamometer, is assembled by A type, two kinds of rotors of Type B, and assembly precision requires high; Single rotor is made up of 20 blades with curved surface features, diameter 3040mm, quality 15500kg; Characteristics such as material trademark is QT450-10, has that size is big, a Heavy Weight, complex structure, and dimensional accuracy and technical conditions are strict; And foundry goods is whole to require to carry out magnetic powder inspection and ultrasonic examination, so does not allow any casting flaw existence.Rotor blade tilts 45 °, and blade is gone out by the core group, leaves the gap between the core core print, and blade sand core is in the core assembly process, and core is difficult to place on the same circumference.Prior art is to adopt manual measurement, and measurement effect varies with each individual, and has reduced casting dimension accuracy, and production efficiency is low.If press general casting method then very difficult its mechanical performance and the dimensional accuracy of guaranteeing.
Chinese patent " 201010259026.X " discloses a kind of casting method and leveling tool of large multi-blade casting; Can be when casting through the position and the attitude of leveling tool adjustment core; But only adopt leveling tool to be difficult to confirm whether core is positioned on the same circumference, and adopt the manual measurement precision not enough.
Summary of the invention
Technical problem to be solved by this invention provides a kind of casting method and adjustment frock of ultra-large type multiple-blade rotor, can improve the blade rotor castability, guarantees excellent mechanical properties and qualified dimensional accuracy.
For solving the problems of the technologies described above, the technical scheme that the present invention adopted is: a kind of adjustment frock, and support is provided with cross bar, through bearing pin an adjusting rod is installed at least on the cross bar, and the upper end and the scale of adjusting rod are slidingly connected.
Described support below is provided with horizontal bearing and/or vertical bearing.
Described adjusting rod is two.
The length of bearing pin top is greater than the length of bearing pin below in the described adjusting rod.
The one or both sides of described adjusting rod are provided with the adjustment piece.
Described scale is two.
A kind of casting method of application adjustment frock casting ultra-large type multiple-blade rotor may further comprise the steps:
1) blade position integral body is placed chill at the thick large part place of blade rotor down, and the die cavity top is provided with rising head;
2) make blade sand core;
3) core assembly guarantees that through the adjustment frock blade sand core is on the same circumference;
4) mould assembling;
5) cast:
Obtain the qualified ultra-large type multiple-blade rotor of dimensional accuracy through above step.
Add hot blast >=24 hour before the cast, maintenance cavity temperature >=60 ℃.
Adopt bottom gating during cast.
Described rising head distributes with the shellring shape.
Provided by the invention
OnePlant the casting method and the adjustment frock of ultra-large type multiple-blade rotor; The hydraulic dynamometer blade rotor that adopts this method to produce; Not only satisfied the mechanical performance requirement of material, also satisfied the assembly technical requirement of Chevron Research Company (CRC), and guaranteed the compactness of its material blade rotor.Blade rotor does not have the existence of casting flaw on its fitting surface and each blade, adopt the adjustment frock to guarantee the dimensional accuracy of blade rotor, and good assembling effect and serviceability have improved operating efficiency.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is described further:
Fig. 1 is the structural representation of adjustment frock among the present invention.
Fig. 2 is the cutaway view of die cavity among the present invention.
Fig. 3 is the vertical view of die cavity among the present invention.
The specific embodiment
Embodiment 1:
A kind of adjustment frock, support 5 is provided with cross bar 12, through bearing pin 8 adjusting rod is installed at least on the cross bar 12, and the upper end and the scale of adjusting rod are slidingly connected.
Described support 5 belows are provided with horizontal bearing 10 and/or vertical bearing 11.
The length of bearing pin 8 tops is greater than the length of bearing pin 8 belows in the described adjusting rod.
The one or both sides of described adjusting rod are provided with the adjustment piece.
Embodiment 2:
In Fig. 1; A kind of adjustment frock, support 5 is provided with cross bar 12, and cross bar 12 is vertical with support 5; Through bearing pin 8 length of the length of bearing pin 8 tops in first adjusting rod 3 and second adjusting rod, 4, the first adjusting rods 3 and second adjusting rod 4 greater than bearing pin 8 belows is installed on the cross bar 12.The upper end of first adjusting rod 3 and first scale 1 are slidingly connected; The upper end of second adjusting rod 4 and second scale 2 are slidingly connected.Also be provided with bracing piece on the support 5.The both sides that the both sides of first adjusting rod 3 are provided with first adjustment piece 6, the second adjusting rods 4 are provided with the second adjustment piece, 7, the first adjustment pieces 6 and second and adjust piece 7 and fix in order to alignment.Below support 5, be provided with vertical bearing 11 with horizontal bearing 10 so that the support axis revolution of bearing 11 longitudinally, and laterally bearing 10 is used for supporting bracket 5 when revolution.
Embodiment 3:
Casting method like a kind of application adjustment frock casting ultra-large type multiple-blade rotor among Fig. 2, Fig. 3 may further comprise the steps:
1) technological design, blade position integral body are adopted bottom gating down, and being provided with of cast gate 14 is as shown in Figure 2, place chill at the thick large part place of blade rotor, make foundry goods each several part modulus in a basic balance, reach simultaneously and solidify.Die cavity 15 tops are provided with rising head 13, and described rising head 13 distributes with the shellring shape, with guarantee liquid increment that shrinks and foundry goods from feeding capacity.
2) analogue formation.Shrinkage factor: circumferencial direction, short transverse are got 1% reduced scale; Allowance: end face+15mm, bottom surface, side and endoporus all+12mm; Pattern draft: external mold and core box all get 1 ° 15 '; 1.5mm is got in mud core gap.External mold is made integral body, makes blade sand core 9, and blade sand core 9 core prints are interspersed by differing heights; The setting-out of blade core box is made.
3) press embodiment 2 assembling adjustment frocks, and use the first adjustment piece 6 and the second adjustment piece 7 will adjust the frock alignment and fix.
4) core assembly guarantees that through the adjustment frock blade sand core 9 is on the same circumference, at first presses in the artwork mode core assembly in order; Blade sand core 9 is hung with driving successively and kept flat in the corresponding core print, utilizes the adjustment frock to regulate, and is as shown in Figure 1; Principle is similar right angled triangle principle, and when the blade sand core deflection center of circle, will squint to the center of circle in first adjusting rod 3 and second adjusting rod, 4 lower ends; A segment distance will slide on second scale 2 in second adjusting rod, 4 upper ends; The length of bearing pin top is greater than the length of bearing pin below in the adjusting rod, and the distance of on scale, sliding is exaggerated and is beneficial to measure, and squints to the distance in the center of circle than drawing blade sand core 9 according to the length of second adjusting rod, 4 top and bottom; Position according to gained data adjustment blade sand core; Thereby guarantee the accuracy of blade sand core position, guarantee that 20 blade sand core are on the same circumference, behind the following core blade sand core is fixed in sand mold down.
5) mould assembling, the core assembly mould assembling that finishes.Add hot blast >=24 hour before the cast, maintenance cavity temperature >=60 ℃.
6) cast according to proportioning process, adds the pig iron, old material, steel scrap and carburant during melting in the stove.When molten iron temperature reached 1420 ℃, spectrum analysis was carried out in sampling, according to analysis result molten iron chemical composition in the stove is adjusted, to reach the regulation requirement.Define objective chemical composition (percentage by weight) is: C 3.4～3.5; Si 2.5～2.7; Mn≤0. 5; P≤0.06; S≤0.02.Composition is controlled to be in the stove: C 3.45 %; Si 2.6 %; Mn 0.43 %; P 0.041%; S 0.013%.Molten iron adopts and pours the method inoculated through the FeSi75 inoculated, the molten iron after the inoculated in 10min in cast as early as possible, preventing inoculation fade, thereby obtain desirable metallographic structure and mechanical performance.
Obtain zero defect and the qualified ultra-large type multiple-blade rotor of dimensional accuracy through above step.
Claims (10)
1. adjust frock for one kind, it is characterized in that: support (5) is provided with cross bar (12), and cross bar (12) is gone up and through bearing pin (8) adjusting rod is installed at least, and the upper end and the scale of adjusting rod are slidingly connected.
2. a kind of adjustment frock according to claim 1 is characterized in that: described support (5) below is provided with vertical bearing (11) and/or horizontal bearing (10).
3. a kind of adjustment frock according to claim 1 is characterized in that: described adjusting rod is two.
4. according to claim 1 or 3 described a kind of adjustment frocks, it is characterized in that: the length of bearing pin in the described adjusting rod (8) top is greater than the length of bearing pin (8) below.
5. a kind of adjustment frock according to claim 4, it is characterized in that: the one or both sides of described adjusting rod are provided with the adjustment piece.
6. a kind of adjustment frock according to claim 1 is characterized in that: described scale is two.
7. an application rights requires the casting method of each described adjustment frock casting ultra-large type multiple-blade rotor of 1-6, it is characterized in that may further comprise the steps:
1) blade position integral body is placed chill at the thick large part place of blade rotor down, and die cavity (15) top is provided with rising head (13);
2) make blade sand core (9);
3) core assembly guarantees that through the adjustment frock blade sand core (9) is on the same circumference;
4) mould assembling;
5) cast;
Obtain the qualified ultra-large type multiple-blade rotor of dimensional accuracy through above step.
8. the casting method of a kind of ultra-large type multiple-blade rotor according to claim 7 is characterized in that: add hot blast >=24 hour before the cast, keep die cavity (15) temperature >=60 ℃.
9. the casting method of a kind of ultra-large type multiple-blade rotor according to claim 7 is characterized in that: adopt bottom gating during cast.
10. the casting method of a kind of ultra-large type multiple-blade rotor according to claim 7 is characterized in that: described rising head (13) distributes with the shellring shape.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110030464A CN102069150B (en) | 2011-01-28 | 2011-01-28 | Method for casting ultra-large multi-blade rotor and adjusting tool |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110030464A CN102069150B (en) | 2011-01-28 | 2011-01-28 | Method for casting ultra-large multi-blade rotor and adjusting tool |
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| Publication Number | Publication Date |
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| CN102069150A CN102069150A (en) | 2011-05-25 |
| CN102069150B true CN102069150B (en) | 2012-10-10 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108339945B (en) * | 2018-03-19 | 2024-01-09 | 江苏吉鑫风能科技股份有限公司 | Casting mold and casting method for large disc type complex structure parts |
| CN109290524A (en) * | 2018-03-23 | 2019-02-01 | 上海宏钢电站设备铸锻有限公司 | A kind of subcritical stator blade casting technique of 300MW |
| CN111299512B (en) * | 2018-12-11 | 2021-04-27 | 无锡众鑫模具科技有限公司 | Water pump impeller casting and production process thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101386056A (en) * | 2008-10-07 | 2009-03-18 | 大连船用推进器有限公司 | Tire retreading casting molding method |
| CN101634544A (en) * | 2009-09-02 | 2010-01-27 | 郑州辰维科技有限公司 | Water turbine blade blank profile measuring and machining allowance analyzing method |
| CN101920312A (en) * | 2010-08-21 | 2010-12-22 | 宜昌船舶柴油机有限公司 | Casting method and leveling tool for large multi-blade casting |
| CN201950167U (en) * | 2011-01-28 | 2011-08-31 | 宜昌船舶柴油机有限公司 | Regulating tool |
-
2011
- 2011-01-28 CN CN201110030464A patent/CN102069150B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101386056A (en) * | 2008-10-07 | 2009-03-18 | 大连船用推进器有限公司 | Tire retreading casting molding method |
| CN101634544A (en) * | 2009-09-02 | 2010-01-27 | 郑州辰维科技有限公司 | Water turbine blade blank profile measuring and machining allowance analyzing method |
| CN101920312A (en) * | 2010-08-21 | 2010-12-22 | 宜昌船舶柴油机有限公司 | Casting method and leveling tool for large multi-blade casting |
| CN201950167U (en) * | 2011-01-28 | 2011-08-31 | 宜昌船舶柴油机有限公司 | Regulating tool |
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