Sand reducing barrel for wind power product casting
By using sand reduction buckets in wind power product casting, filling large-grain silicon sand and using a combined structure of sand hanging rods and hooks, the problem of poor exhaust gas in traditional sand cores is solved, pore defects and production costs are reduced, and the quality of castings is improved.
Patent Information
- Application Number
- CN202421863983.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-02
AI Technical Summary
During the casting of wind power products, traditional sand cores are prone to pore defects due to poor exhaust, and the amount of steel balls and chromium ore sand is used, which increases production costs.
A sand reduction bucket for casting of wind power products was designed. By filling large-grain silica sand inside the sand reduction bucket, breathability is improved, and the sand core is effectively exhausted and cooled by the combination of sand hanging rods and hooks.
It effectively reduces the pore defects of the castings, reduces the amount of steel balls and chromium ore sand, reduces production costs, and improves the quality and performance of the castings.
Smart Images
Figure CN222902561U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wind power product casting, in particular to a sand reducing barrel for wind power product casting. Background Technique
[0002] The planet carrier is one of the important components of wind power gearbox products, with a large market demand. Such products have relatively high performance requirements and require UT flaw detection to ensure no shrinkage porosity, shrinkage cavity and other defects inside; the wall thickness of the product is uneven, and the wall thickness at the transition is relatively large. To ensure the internal quality of the product, it is necessary to make the casting solidify simultaneously at each position inside. At this time, it is necessary to accelerate the cooling rate of the thick-walled position, which is achieved by increasing the number of chill blocks or iron sand. A chill block is used to accelerate the cooling rate of the casting at its location, and its effect is determined by its heat storage capacity and thermal conductivity. The material of the chill block can be special foundry sand, such as chromite sand, zircon sand, etc.; it can also be metal, such as cast iron, steel, etc. The local inner cavity of the long axis of this product is a non-machined surface. Placing chill blocks will result in poor appearance and difficult grinding, and it can only be achieved by using iron sand (chromite sand + steel shot).
[0003] After retrieval, the document with the publication number "CN214920270U" mentions that "the utility model discloses a sand-saving barrel and a device for casting the base of a wind power product, which solves the problems of large consumption of core sand, resin and fixing agent and high production cost in the prior art. This sand-saving barrel includes a sand-saving barrel main body and a lifting lug assembly. The lifting lug assembly includes a main lifting lug and a secondary lifting lug. Using the sand-saving barrel as a core bone and arranging a sealed cavity inside the sand-saving barrel main body can prevent the core from entering, save the consumption of molding sand, resin and curing agent, and reduce the production cost", but in the traditional casting process, in order to enhance the cooling effect, the core is made of steel shot and chromite sand, and after the mold is broken, it is mixed with resin sand and cannot be recycled, resulting in a large consumption of steel shot and chromite sand; moreover, under the action of high-temperature molten metal, due to the evaporation of moisture and the volatilization, decomposition and combustion of organic substances, a large amount of gas will be generated in a very short time during pouring. And the core of this product is a solid core, with poor exhaust. When the core has poor exhaust, these gases will invade the molten metal, causing porosity defects in the casting; moreover, it is not conducive to the cooling of the casting, cannot solidify simultaneously, and results in uneven structure.
[0004] Therefore, we provide a sand reducing barrel for wind power product casting to solve the above problems. Content of the Utility Model
[0005] The purpose of the utility model is to provide a sand reducing barrel for wind power product casting to solve the problems raised in the above background technique.
[0006] To achieve the above object, the present utility model provides the following technical solution: A sand reduction barrel for casting wind power products, comprising a core box and a sand reduction mechanism. The sand reduction mechanism is arranged inside the core box, and the sand reduction mechanism includes a cavity, a sand reduction barrel, exhaust holes, sand hanging rods and hooks.
[0007] Preferably, a cavity is provided inside the core box, and a sand reduction barrel is movably connected inside the cavity. The cavity is filled with chromite sand and steel shot.
[0008] Preferably, exhaust holes are provided on the surface of the sand reduction barrel, and the exhaust holes are arranged evenly in a ring shape.
[0009] Preferably, the exhaust holes have a diameter of 5φ, and the inside of the sand reduction barrel is filled with large particle silica sand.
[0010] Preferably, sand hanging rods are welded on the outside of the sand reduction barrel, and the sand hanging rods are made of deformed steel.
[0011] Preferably, the wall thickness of the sand reduction barrel is 10 mm, the diameter of the sand hanging rod is 22φ, and there are four groups of sand hanging rods.
[0012] Preferably, a hook is installed at the top of the sand reduction barrel, and the top of the hook is flush with the top of the core box.
[0013] Compared with the prior art, the beneficial effects of the present utility model are:
[0014] Through the setting of the sand reduction mechanism, first fill the inside of the sand reduction barrel with large particle silica sand to improve the air permeability inside the sand reduction barrel. Then, hang the sand reduction barrel inside the core box with a wire or bolt through the hook, and fill chromite sand and steel shot from the outside of the sand reduction barrel to the inside of the core box. At the same time, the sand hanging rods play a role in hanging sand to improve the strength of the resin sand. After the sand core is hardened, take it out of the core box and put it into the cavity. After the mold is closed, pour the molten metal. After the mold is broken, take out the casting, take out the sand reduction barrel from the sand mold, and leave the chromite sand and steel shot in the barrel for the next use. In this way, by filling with large particle silica sand inside, the air permeability is good, so that the gas generated in the sand core during pouring can be discharged smoothly and in time, reducing the porosity defect of the casting, greatly reducing the usage amount of steel shot and chromite sand, and reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is the overall external structure schematic diagram proposed by the present utility model;
[0016] Figure 2 is the internal structure schematic diagram of the core box proposed by the present utility model;
[0017] Figure 3 is the internal structure schematic diagram of the sand reduction barrel proposed by the present utility model;
[0018] Figure 4 Schematic diagram of the overall sectional structure proposed by the present utility model.
[0019] In the figure: 1, core box; 2, sand reduction mechanism; 201, cavity; 202, sand reduction barrel; 203, exhaust hole; 204, sand hanging rod; 205, hook. Specific embodiments
[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0021] Please refer to Figures 1-4 As shown, a sand reduction barrel for casting wind power products includes a core box 1 and a sand reduction mechanism 2. The sand reduction mechanism 2 is arranged inside the core box 1. The sand reduction mechanism 2 includes a cavity 201, a sand reduction barrel 202, an exhaust hole 203, a sand hanging rod 204 and a hook 205.
[0022] Furthermore, a cavity 201 is opened inside the core box 1. The sand reduction barrel 202 is movably connected inside the cavity 201. The cavity 201 is filled with chromite sand and steel shot. By filling chromite sand and steel shot from the outside of the barrel to the inside of the core box 1, the cooling effect of the sand core is improved. At the same time, the gas generated in the sand core during pouring can be discharged smoothly and in a timely manner, reducing the porosity defects of the casting.
[0023] Furthermore, exhaust holes 203 are opened on the surface of the sand reduction barrel 202. The exhaust holes 203 are arranged in a uniform ring. The air permeability of the sand reduction barrel 202 is further improved through the exhaust holes 203, increasing the hardening speed of the sand core.
[0024] Furthermore, the diameter of the exhaust hole 203 is φ5. The inside of the sand reduction barrel 202 is filled with large-grain silica sand. By filling large-grain silica sand inside the sand reduction barrel 202, the air permeability inside the sand reduction barrel 202 is improved.
[0025] Furthermore, a sand hanging rod 204 is welded on the outside of the sand reduction barrel 202. The sand hanging rod 204 is made of threaded steel. The sand hanging rod 204 plays a role in hanging sand, improving the strength of the resin sand.
[0026] Furthermore, the wall thickness of the sand reduction barrel 202 is 10 mm, the diameter of the sand hanging rod 204 is φ22, and there are four groups of sand hanging rods 204, thereby increasing the strength of the sand reduction barrel 202 and improving the sand hanging effect at the same time.
[0027] Further, a lifting hook 205 is welded and installed at the top end of the sand reduction barrel 202. The top end of the lifting hook 205 is flush with the top end of the core box 1. The lifting hook 205 is used to replace the core bone for core lifting, which is beneficial to the exhaust of the sand core.
[0028] Working principle: When in use, in the first step, large-particle silica sand is filled into the interior of the sand reduction barrel 202, and then the sand reduction barrel 202 is suspended inside the core box 1 by a steel wire or bolt through the lifting hook 205. In the second step, chromite sand and steel shot are filled from the outside of the sand reduction barrel 202 to the inside of the core box 1. At the same time, the hanging sand rod 204 plays a role in hanging sand to improve the strength of the resin sand. In the third step, after the sand core is hardened, it is taken out from the core box 1 and placed into the cavity 201. After the mold is closed, casting is carried out. After the mold-opening time, the casting is taken out, and the sand reduction barrel 202 is taken out from the sand mold. The chromite sand and steel shot in the barrel are reserved for the next use. In this way, the use of a sand reduction barrel for the casting of a wind power product is completed.
[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A sand reduction barrel for casting wind power products, comprising a core box (1) and a sand reduction mechanism (2), characterized in that: A sand reducing mechanism (2) is arranged inside the core box (1), and the sand reducing mechanism (2) comprises a mold cavity (201), a sand reducing bucket (202), an exhaust hole (203), a sand hanging rod (204) and a hook (205).
2. The sand reducing barrel for casting wind power products according to claim 1 is characterized in that: A cavity (201) is provided inside the core box (1), a sand reducing bucket (202) is movably connected to the inside of the cavity (201), and the cavity (201) is filled with chromium ore sand and steel shot.
3. The sand reducing barrel for casting wind power products according to claim 1 is characterized in that: The surface of the sand reducing barrel (202) is provided with exhaust holes (203), and the exhaust holes (203) are evenly arranged in a ring shape.
4. The sand reducing barrel for casting wind power products according to claim 1, characterized in that: The diameter of the exhaust hole (203) is φ5, and the interior of the sand reduction barrel (202) is filled with large-grained silica sand.
5. The sand reducing barrel for casting wind power products according to claim 1, characterized in that: A sand hanging rod (204) is welded to the outer side of the sand reducing barrel (202), and the sand hanging rod (204) is made of threaded steel.
6. The sand reducing barrel for casting wind power products according to claim 1, characterized in that: The wall thickness of the sand reducing barrel (202) is 10 mm, the diameter of the sand hanging rod (204) is φ22, and four groups of the sand hanging rods (204) are provided.
7. The sand reducing barrel for casting wind power products according to claim 1, characterized in that: A hook (205) is installed at the top of the sand reduction barrel (202), and the top of the hook (205) is flush with the top of the core box (1).