what is Volute? Volute is a spiral or scroll-like ornament that is commonly found in architecture and design. It is often used to decorate the capital of a column or as an embellishment on a staircase balustrade. The term “volute” comes from the Latin word “voluta,” which means “scroll.” We usually choose casting as the prior method to make volute. Sipx casting foundry supplies China volute casting parts all over the world.
Volute casting manufacturer
As seasoned professionals in the casting industry, we are proud to say that we specialize in volute casting. Our skilled team of experts possesses years of experience and knowledge, allowing us to deliver exceptional results when it comes to volute casting.
Our state-of-the-art facilities and advanced equipment enable us to deliver precise and high-quality castings within the shortest turnaround time possible. Our unwavering commitment to client satisfaction drives us to consistently meet and exceed expectations. With us, you can rest assured that you are working with an expert volute casting manufacturer that always puts quality first. Get in touch with us now to learn more about our services and how we can assist in bringing your casting vision to life.
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The manufacturing methods of the volute
The volute is a component used in centrifugal pumps that helps to convert radial flow to axial flow. There are several different manufacturing methods for the volute, which can vary depending on the specific application and the desired performance characteristics.
Casting volute can be realized in various materials such as iron, steel, bronze, or aluminum. The casting process involves pouring molten metal into a mold that is designed to form the desired shape of the volute. It is the easiest way to do volute.
Sometimes, CNC machining can be used to make volute prototypes. But not efficient for batch production.
Centrifugal casting is the most common method used for casting volutes. This process involves rotating a mold or die at high speeds while pouring molten metal into it, causing the metal to be forced towards the outer edges of the mold and forming the desired shape of the volute.
Centrifugal casting is preferred for volutes because it produces a dense, uniform casting with minimal porosity and shrinkage. Other casting methods such as investment casting or sand casting can also be used, but may not produce the same level of precision and consistency as centrifugal casting.
Commonly used material for volute casting
The volute material for a pump can vary depending on the application and preferences of the manufacturer. Some common materials used for casting volutes include:
- Cast iron: This is a popular choice for iron casting manufacturers to make volutes due to its strength, durability, and cost-effectiveness. Cast iron volutes are suitable for a wide range of applications and can resist corrosion and wear.
- Stainless steel: This is another popular material for volutes that require a high level of corrosion resistance. Stainless steel volutes are often used in environments that expose the pump to acidic or salty liquids.
- Bronze: Bronze volutes are typically used when a pump needs to handle corrosive liquids, such as seawater. Bronze is an alloy of copper, tin, and sometimes other metals, and it offers good corrosion resistance and strength.
- Aluminum: Aluminum volutes are often used in smaller, lightweight pumps. Aluminum is lightweight, durable, and resistant to corrosion, making it a good choice for some applications
Designing casting technology for volute castings
The object of this project is volume, which is made of QT500-7 ductile iron components with a complex shape, large size, and moderate thickness. Due to the high pressure that the internal components need to withstand, as well as the presence of impurities that require a certain level of impact resistance and thermal stability, the internal structure of castings requires high requirements.
In the process of designing the volume casting process, firstly, due to the structural characteristics of the casting, the parting method, the volume casting process parameters, and the proportion and size of the pouring system are determined. In this project, the volume casting casting process method adopts a middle parting, a semi closed side pouring pouring system structure, a flat pouring system, and a wet sand mechanical molding.
Cracks and other defects may occur inside the castings. To fully ensure the quality of the volume castings, comprehensive ultrasonic testing is conducted on the castings. Due to the fact that the casting material is ferritic ductile iron, a high-temperature annealing heat treatment process is required for the volume casting to eliminate internal stress and improve its quality.
The smelting adopts scrap steel and carburizing agent smelting, and adopts the ladle injection method spheroidization process and the tapping groove injection method for incubation. The boxing time is 4916 seconds. After shot blasting and cleaning, the casting is subjected to annealing heat treatment when there are no defects detected.
- Review of castings structure and spindle craftsmanship
Production volute casting parts, not only to meet the requirements of the use, but also to make the workpiece structure itself fit the requirements of the workpiece production, and to ensure the quality of the workpiece, as far as possible to make the process method more accessible. The casting method chosen by the workpiece itself needs to satisfy the appropriate batch and economy, so the structural process of the workpiece has very important significance.
1.1 Analysis of Part Structure Characteristics
This part is casting volute, volute casting parts structure is more complex, but the casting process is better, the wall thickness is uniform, not susceptible to casting problems such as heat joint.
Part material is QT500-7
Technical Requirements: Follow the notes to the drawings as follows
Tolerances and allowances are in accordance with ISO 0862-3-DCTG 11-RMA 6 (RMAGG). All unannounced fillets are handled as required by the drawing.
The air inlet, the air outlet and the ends are the processing area. The shape of the part is shown in Figure 1.1:
Figure1.1 casting volute 3D view
Shape features: volute is the more common parts, the main feature is complex cavity, the total mass of parts is about 1972Kg, the size of 1652 * 1510 * 814mm, wall thickness is uniform, the main wall thickness is around 60mm. The parts are surrounded by four lugs with a wall thickness of 50 mm.
1.2 Part Structure Analysis
volute inner cavity structure is complex, difficult to type, internal lines are non-parametric curve, the design process to convert parameters curve, internal cavity to make a whole sand core, due to the large end of the air inlet, the position of the air inlet is easy to secure.
For casting craftsmanship, the castings are typed vertically along the inlet direction. However, Figure 1.2 location is not easy to die points, so it will increase certain material subsidies, without affecting the overall component structure. The specific additions are shown in Figure 1.2 below:
Figure1.2 the specific additions
2. Selection requirements for styling materials
Ductile iron cavity parts, the fluidity of ductile iron is higher, The coefficient of expansion and shrinkage are small, but the castings will have stomatal and shrinkage holes, shrinkage, etc., This will make the quality of the casting worse, so the selected sand, core sand should have a small amount of gas, strength meets the requirements.
When designing a process, the analysis and summary mainly need to synthesize the following aspects:
When designing a process, the analysis and summary mainly need to synthesize the following aspects:
a. volute casting parts if the wall thickness is relatively thin, prone to pouring defects such as defects: if the casting is too thick and then causes the grains to become thick, shrink holes, white spots and other defects.
b. volute casting parts structure should not impede the flow of metal fluids. The thickness of the walls and the intersecting corners of the two walls should be highlighted. where each wall intersects, Transitions and transitions cannot be too straightforward. They can avoid various casting defects due to stress concentration.
c. volute casting parts need to be aware of internal and external wall thickness problems. In order to reduce various casting defects, the inner and outer walls of the casting should be cooled evenly. The outer wall of volute casting parts is better than the inner wall. So the outer wall should be thicker than the inner wall.
3.1 Determination of annotation position
The pouring position is greatly influenced by the solidification mode of the controlled casting from a certain perspective. Castings that achieve sequential solidification have low internal stress, small deformation, relatively uniform and consistent metallographic structure, and do not use or rarely use risers to save metal. Reduce the tendency towards enthusiasm.
Based on the theory and practical experience of alloy solidification, taking into account the above factors and the current volute casting part material QT500-7, the casting adopts an injection pouring system with end face (machining surface).
The specific position shown in the following figure (Figure 3.1) is the pouring surface.
Based on the theory and practical experience of alloy solidification, taking into account the above factors and the current volute casting part material QT500-7, the casting adopts an injection pouring system with end face (machining surface).
The specific position shown in the following figure (Figure 3.1) is the pouring surface.
Figure 3.1 volute pouring surface
3.2 Selection of parting surface
The parting surface is usually defined after the pouring position is specified, and the selection is made based on the specific situation of the casting, taking into account the advantages and disadvantages of different parting surfaces and schemes. There are the following principles:
(1) It is best to ensure that all or most of the workpieces are in the same half shape
(2) The determination of the number of parting surfaces needs to adhere to the principle of minimizing the amount possible
(3) It is best not to choose a surface when confirming the parting surface, but to use a flat parting surface
(4) When determining the parting surface in real time, it is necessary to simultaneously consider the issues of core placement, box assembly, and inspection of cavity size
(5) Do not make the sand box too high
Due to the fact that the volute part has an upper and lower half cavity structure, which is similar to a symmetrical structure, the maximum cross-section of the part is used as the parting surface. In this way, the mold can be lifted without the use of active blocks or sand cores, in order to smoothly lift, lower, and fill the mold. As shown in Figure 3.1, select the equal parameter part of the curved shell as the parting surface:
(1) It is best to ensure that all or most of the workpieces are in the same half shape
(2) The determination of the number of parting surfaces needs to adhere to the principle of minimizing the amount possible
(3) It is best not to choose a surface when confirming the parting surface, but to use a flat parting surface
(4) When determining the parting surface in real time, it is necessary to simultaneously consider the issues of core placement, box assembly, and inspection of cavity size
(5) Do not make the sand box too high
Due to the fact that the volute part has an upper and lower half cavity structure, which is similar to a symmetrical structure, the maximum cross-section of the part is used as the parting surface. In this way, the mold can be lifted without the use of active blocks or sand cores, in order to smoothly lift, lower, and fill the mold. As shown in Figure 3.1, select the equal parameter part of the curved shell as the parting surface:
Figure 3.1Selection of parting surface right and left side of view
FAQ
What is volute casting?
Volute casting is a method of casting a part with a curved, spiral shape. It is used primarily in the production of centrifugal pumps and other rotary machines.
How does volute casting work?
Volute casting involves pouring molten metal into a mold that has the shape of the desired part. The mold is designed to create a cavity that will be filled by the molten metal, forming the volute shape. The mold is then removed, leaving behind a solid metal part.
What are the limitations of volute casting?
Volute casting can be challenging to achieve with certain materials, as some alloys may require special casting techniques or equipment. It is also limited in terms of the size and weight of parts that can be produced.
What is the difference between volute casting and other types of casting?
Volute casting is unique in that it creates a spiral shape that is difficult to achieve with other types of casting, such as sand casting or investment casting. It is also typically used for the production of specific types of parts, such as those used in centrifugal pumps.
What materials can be used in volute casting?
Volute casting can be done with a wide range of materials, including various types of steel, iron, and non-ferrous alloys.
What are the advantages of volute casting?
Volute casting allows for the production of complex shapes, such as spiral volutes, with high precision and accuracy. It is also an efficient and cost-effective method of producing parts with a consistent quality.
What industries use volute casting?
Volute casting is used primarily in the production of centrifugal pumps and other rotary machines. It is also used in the manufacturing of some types of turbines and compressors.
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