Chiller assembly for casting shaft hole machining
By using a chilled iron body made of graphite material and a detachable iron core head, the problems of high cost and low efficiency in machining shaft holes of castings are solved, achieving low-cost, high-efficiency machining and ensuring the quality of finished products.
Patent Information
- Application Number
- CN202520040444.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-08
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-01-08
AI Technical Summary
In the current machining of shaft holes in castings, the use of round steel chills or cast iron bars results in high processing costs, long processing times, and low work efficiency.
The chilled iron body is made of graphite material and equipped with a detachable iron core head. It is equipped with vent holes and lifting holes. The structure is designed as a frustum and fixed with set screws to achieve convenient disassembly and positioning.
It reduces processing costs, improves processing efficiency, ensures the quality of finished products, and can be reused, reducing damage to molds.
Smart Images
Figure CN223670184U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to foundry processing technical field relates to a kind of cold iron assembly for casting shaft hole processing. BACKGROUND
[0002] Cold iron refers to accelerate the local cooling speed of casting, and chill material placed in the thick parts such as the inner cavity of casting, the surface of cavity and the inside of mold. Its purpose is to cooperate with the pouring system, control the solidification sequence of casting, to obtain qualified casting. In copper alloy casting, round steel cold iron or cast iron bar stock is often used to process to the specified size according to the process requirements, and then placed in the cavity according to the process requirements. When the casting is rough machined, the cold iron is removed by mechanical processing to form a shaft hole.
[0003] Since the cold iron is disposable, using round steel cold iron or cast iron bar stock will increase the processing cost. At the same time, when the cold iron needs to be removed, the round steel cold iron or cast iron bar stock due to its own material properties, resulting in long processing time, ultimately leading to long processing cycle of the whole shaft hole and low work efficiency.
[0004] To solve the above problems, a cold iron is needed, which is low in cost and easy to process. SUMMARY
[0005] Therefore, the utility model provides a kind of cold iron assembly for casting shaft hole processing, adopt graphite material as the material of cold iron body, cost is lower and it is convenient for later shaft hole processing, and set up iron core head for the positioning of cold iron body and increase overall weight, both ensure the chilling effect, reduce the processing cost, and also ensure the quality of finished product.
[0006] The utility model discloses a kind of cold iron assembly for casting shaft hole processing, including cold iron body and iron core head, the cold iron body is made of graphite material, the iron core head is detachably installed on the bottom surface of the cold iron body.
[0007] Further, the cold iron body is provided with an exhaust hole, which is formed by extending upward along the axial direction from the bottom surface of the cold iron body.
[0008] Further, the top of the cold iron body is provided with a lifting hole, which is formed by opening downward along the central axis of the cold iron body from the top surface of the cold iron body.
[0009] Further, the exhaust hole is arranged at the position of the central axis of the cold iron body, and the distance from the top surface of the exhaust hole to the bottom of the lifting hole is not less than 30mm.
[0010] Further, the cold iron body is a circular table structure with gradually increasing radial dimension from top to bottom.
[0011] Further, the bottom of the cold iron body is integrally provided with a lower segment in a cylindrical structure.
[0012] Further, a fixing member is further included, the top surface of the core head is attached to the bottom surface of the lower segment, and the fixing member is connected to the lower segment after penetrating the core head, so that the core head is limited in the lower segment.
[0013] Further, the core head is in a circular truncated cone structure with a gradually decreasing radial dimension from top to bottom, and the top surface of the core head is conformal to the bottom surface of the lower segment.
[0014] Further, the core head is provided with an exhaust through hole penetrating in the axial direction at a position corresponding to the exhaust hole.
[0015] Further, the top surface of the core head extends downward in the axial direction to form a cylindrical buffer cavity, the buffer cavity is coaxially arranged with the exhaust through hole, and the diameter of the buffer cavity is greater than that of the exhaust through hole.
[0016] The utility model discloses the beneficial effects of:
[0017] The utility model discloses a cold iron assembly for casting shaft hole machining, adopts graphite material as the material of cold iron body, and the cold iron body of graphite material has excellent heat conductivity and is easy to process, can guarantee excellent chilling effect, has low processing cost, and is convenient for post -processing and cleaning of shaft hole, and simultaneously sets up the core head for the whole cold iron positioning and adds certain core weight, and can be repeatedly used, guarantees the chilling effect, further reduces processing cost, and ensures the quality of finished product shaft hole. DRAWINGS
[0018] Figure 1 It is the isometric view of the utility model;
[0019] Figure 2 It is the front view of the utility model;
[0020] Figure 3 It is the front view of the utility model;
[0021] Figure 4 It is the structure isometric view of the core head;
[0022] Figure 5 It is the use schematic drawing of the utility model in the embodiment. CONCRETE IMPLEMENTATION
[0023] It should be noted that in the description of the present application, the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0024] As shown in the figure, the embodiment of the present application discloses a cold iron assembly for machining shaft hole of casting, which comprises a cold iron body 1 and an iron core head 2, the cold iron body 1 is made of graphite material, and the iron core head 2 is detachably installed on the bottom surface of the cold iron body 1. In the present embodiment, the cold iron assembly is composed of two parts, one is the cold iron body 1 for cooling the hole, and the other is the iron core head 2 for positioning the cold iron body 1 during pouring. The cold iron body 1 made of graphite material has excellent heat conductivity and is easy to process, ensuring excellent chilling effect. During post-processing, the iron core head 2 is only removed and the cold iron body 1 is tamped out to complete the machining of the shaft hole. The overall processing cost is low, the cost is lower, and the post-processing and cleaning of the shaft hole are more convenient and efficient. The positioning function of the iron core head 2 mainly reflects two aspects, one is to increase the overall weight, so that the center of gravity of the whole body moves downward, and the pouring is more stable and not easy to move, and the other is to cooperate with the mold to realize positioning. Since the iron core body is made of graphite material, direct positioning in the mold may cause certain damage to it, thereby affecting the quality of the formed part. Therefore, positioning can be achieved through the cooperation of the iron core head 2 and the mold. The positioning of the iron core head 2 and the mold can be achieved by means such as opening an iron core seat, an installation groove on the mold, and connecting with a screw. The specific positioning mode can be selected by the person skilled in the art according to the actual situation, and will not be described here.
[0025] The cold iron body 1 is provided with an exhaust hole 5, which is formed by extending upward along the axial direction from the bottom surface of the cold iron body 1. The cold iron functions to locally cool quickly to accelerate molding during operation, so it will absorb a large amount of heat during pouring. In order to facilitate heat dissipation and improve cooling effect, the exhaust hole 5 is provided.
[0026] The top of the cold iron body 1 is provided with a lifting hole 3, which is formed by opening downward along the central axis of the cold iron body 1 from the top surface of the cold iron body 1. The lifting hole 3 in the present embodiment is a countersunk screw hole as shown in the figure. The provision of the lifting hole 3 makes the transfer and baking of the cold iron body 1 more convenient.
[0027] The utility model discloses, the exhaust hole 5 is arranged at the position of the central axis of the cold iron body 1, the distance from the top surface of the exhaust hole 5 to the hole bottom of the hoisting hole 3 is not less than 30mm. As shown in the figure, the distance from the top surface of the exhaust hole 5 to the hole bottom of the hoisting hole 3 is S, and the distance S in the embodiment is 30mm, and the arrangement ensures that the structural strength of the cold iron body 1 is enough, and the phenomenon that copper liquid flows into the exhaust hole 5 does not occur in the pouring process.
[0028] The utility model discloses, the cold iron body 1 is the circular table structure of gradually increasing from top to bottom radial dimension, namely the circular table of big down small as shown in the figure. The bottom of the cold iron body 1 still integrally forms and sets up lower section 4, and the lower section 4 is the cylinder structure. The cold iron body 1 of this structure is more stable, and the shaft hole quality of processing and shaping is higher. The setting of lower section 4 ensures that the shaft hole entrance section is smooth, and further processing of the shaft hole is more convenient in the later period.
[0029] The utility model discloses still include fixed part 8, the top surface of iron core head 2 is attached to the bottom surface of lower section 4, and fixed part 8 passes through iron core head 2 and is connected to lower section 4, so that iron core head 2 is limited in lower section 4. The fixed part 8 in the embodiment is a set screw, and four set screws are arranged in the embodiment, and the four set screws are evenly distributed along the circumference of iron core head 2. The set screw is screwed into the bottom surface of lower section 4 after passing through iron core head 2, and the installation and fastening of iron core head 2 are completed. In order to facilitate the setting and installation of the set screw, four through holes are arranged in the iron core head 2 correspondingly.
[0030] The utility model discloses, the iron core head 2 is the circular table structure of gradually reducing from top to bottom radial dimension, namely the circular table of big down small as shown in the figure, and the top surface of iron core head 2 is conformal with the bottom surface of lower section 4. Iron core head 2 is arranged as the circular table structure of big down small, which is convenient for core guiding, so as to avoid the damage of iron core seat and other structures.
[0031] The utility model discloses, the iron core head 2 is correspondingly provided with exhaust hole 6 along the axial through -going of the position of exhaust hole 5. The top surface of iron core head 2 extends downward along the axial and forms the cylindrical buffer cavity 7, the buffer cavity 7 is coaxial with exhaust hole 6, and the diameter of buffer cavity 7 is greater than the diameter of exhaust hole 6. As shown in the figure, the diameter of buffer cavity 7 in the embodiment is greater than the diameter of exhaust hole 6, and is less than the diameter of the top surface of iron core head 2, so that the top of iron core head 2 forms the ring structure as shown in the figure. The recessed buffer cavity 7 on iron core head 2 mainly has two effects: one is to collect the graphite particles that may fall off when the fastener is locked, to avoid the locking surface being lifted and affecting the shaft hole blank size, and the other is to reduce the contact surface of the cold iron body 1 and the iron core head 2, to facilitate better locking, to prevent the copper liquid from seeping into the contact surface during the pouring process, to increase the difficulty of the cold iron body 1 to separate.
[0032] In specific use, the iron core head 2 is connected and locked with the chiller body 1 through four fasteners 8 uniformly distributed at the bottom; after the assembly is completed, the hoisting hole 3 at the top of the chiller body is screwed with a lifting ring screw, and the whole is put into an oven mold furnace for baking at 400±30℃ for 5 hours. The casting is poured on the same day and is synchronized with the baking of the mold. After the sand cleaning and the runner cleaning of the casting are completed, the fasteners 8 are unscrewed, the iron core head 2 is taken out, the chiller body 1 is broken by an impact drill, and the perfect blank shaft hole is exposed, so that the whole operation process is convenient and efficient.
[0033] Finally, it should be pointed out that the above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the present application, and all should be covered in the scope of the claims of the present application.
Claims
1. A chill block assembly for machining a shaft hole in a casting, characterized by: The cold iron body is made of graphite material, and the iron core head is detachably installed on the bottom surface of the cold iron body.
2. The chill block assembly of claim 1, wherein: The cold iron body is provided with an exhaust hole formed by extending upward along the axial direction from the bottom surface of the cold iron body.
3. The chill block assembly of claim 2, wherein: The top of the cold iron body is provided with a lifting hole formed by opening downward along the central axis of the cold iron body from the top surface of the cold iron body.
4. The chill block assembly of claim 3, wherein: The exhaust hole is arranged at the position of the central axis of the cold iron body, and the distance from the top surface of the exhaust hole to the bottom of the lifting hole is not less than 30 mm.
5. The chock assembly of claim 1, wherein: The cold iron body is a circular table structure with the radial dimension gradually increasing from top to bottom.
6. The chock assembly of claim 1, wherein: The bottom of the cold iron body is also integrally provided with a lower segment in a cylindrical structure.
7. The chill block assembly of claim 6, wherein: The top surface of the iron core head is attached to the bottom surface of the lower segment, and the fixing member is connected to the lower segment after penetrating through the iron core head, so that the iron core head is limited in the lower segment.
8. The chill block assembly of claim 6, wherein: The iron core head is a circular table structure with the radial dimension gradually decreasing from top to bottom, and the top surface of the iron core head is conformal to the bottom surface of the lower segment.
9. The chock assembly of claim 2, wherein: The iron core head is provided with an exhaust through hole penetrating along the axial direction corresponding to the position of the exhaust hole.
10. The chock assembly of claim 9, wherein: The top surface of the iron core head extends downward along the axial direction to form a cylindrical buffer cavity, the buffer cavity is coaxially arranged with the exhaust through hole, and the diameter of the buffer cavity is greater than the diameter of the exhaust through hole.