A polishing device for metal lost foam casting production
By designing a grinding device that includes a handheld part, an angle adjustment mechanism, a power unit, and a detachable grinding head, the problem of grinding the internal cavity of complex castings was solved, achieving all-round cleaning of the casting's internal cavity and improving the surface quality of the casting.
Patent Information
- Application Number
- CN202522045057.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-23
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-23
AI Technical Summary
Existing technologies are insufficient for effectively grinding the internal cavities of castings with complex structures and narrow internal spaces, especially for removing refractory bonding coatings adhering to the surface of the castings.
A grinding device for the production of lost foam castings is designed, including a hand-held part, an angle adjustment mechanism, a connecting part, a power part, a rotating part, and a grinding head. The rotating part can be inserted into a narrow inner cavity for grinding, and the grinding head can be disassembled and replaced to adapt to different inner cavity environments.
It enables all-round grinding of complex internal cavities, significantly improves the surface cleaning quality of casting internal cavities, and can effectively remove coatings and burrs.
Smart Images
Figure CN224674565U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of lost foam casting technology, and in particular relates to a grinding device for the production of metal lost foam castings. Background Technology
[0002] Lost foam casting, also known as solid pattern casting, is a casting method that uses foam plastic to create a solid mold that is identical in structure and size to the part. This mold is then coated with a refractory binder, dried, and dry-molten sand. The sand is vibrated to compact the mold, and then molten metal is poured in, causing the pattern to vaporize and disappear, resulting in a metal part with the same shape as the pattern. After the casting solidifies and cools, the sand box is tilted to allow the dry sand to flow out, exposing the casting. Most of the refractory binder will automatically detach during sand removal, but some will remain firmly attached to the casting surface and need to be polished away.
[0003] For castings with complex structures and narrow internal spaces (such as pump housings, bearing housings, and turbine housings), grinding their internal cavities is a recognized challenge, and there is an urgent need for a casting grinding device that can penetrate deep into the internal cavity for grinding. Utility Model Content
[0004] The purpose of this utility model is to provide a grinding device for the production of lost foam castings of metal, so as to solve the technical problems mentioned in the background art.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A grinding device for producing lost foam castings includes: a hand-held part, an angle adjustment mechanism, a connecting part, a power part, a rotating part, and a grinding head; The lower part of the handheld part is connected to the upper part of the connecting part through the angle adjustment mechanism, which is used to adjust the relative angle between the handheld part and the connecting part; the bottom of the connecting part is connected to the power part, and the power part is connected to the top of the rotating part to drive the rotating part to rotate; the rotating part is elongated and has the grinding head at its bottom.
[0006] As a further improvement of this utility model, the rotating part is detachably connected to the grinding head.
[0007] As a further improvement of this utility model, the bottom of the rotating part is provided with an internally threaded tube, and the grinding head is provided with a stud that is compatible with the internally threaded tube. The rotating part and the grinding head are detachably connected to the internally threaded tube via the stud.
[0008] As a further improvement of this utility model, the angle adjustment mechanism includes two ear plates disposed at the lower part of the hand-held part, mounting plates respectively located on the outer sides of the two ear plates, and a connecting hole and a locking hole disposed on the connecting part; The connecting portion is provided between the two ear plates, and the connecting hole on the connecting portion is hinged to the two ear plates by a pin; the two mounting plates are provided with positioning components that cooperate with the locking hole.
[0009] As a further improvement of this utility model, the positioning component includes a plurality of fixing holes provided on the mounting plate and fixing bolts connected to the fixing holes and the locking holes; the plurality of fixing holes are arranged in an arc with the center of the connecting hole as the center; Alternatively, the positioning component includes an arcuate groove disposed on the mounting plate and a fixing bolt connected to the fixing hole and the locking hole; the arcuate groove is centered on the center of the connecting hole.
[0010] As a further improvement of this utility model, the connecting part is provided with an expansion part, the expansion part is provided with the locking hole, and the expansion part is in contact with the two mounting plates.
[0011] As a further improvement of this utility model, the power unit includes a protective shell and a motor located inside the protective shell; The top of the protective shell is connected to the bottom of the connecting part, and the motor inside it passes through the bottom of the protective shell and is coaxially connected to the rotating part.
[0012] As a further improvement of this utility model, the protective shell includes a shell and a cover plate, the cover plate being detachably connected to the top of the shell, and the top of the shell being connected to the bottom of the connecting plate.
[0013] As a further improvement of this utility model, the upper part of the handheld part is provided with several anti-slip strips.
[0014] As a further improvement of this utility model, the grinding head is spherical.
[0015] The beneficial effects of adopting the above technical solution are as follows: This invention comprises a handheld part, an angle adjustment mechanism, a connecting part, a power unit, a rotating part, and a grinding head, all connected in series. The rotating part is elongated and allows the grinding head to penetrate narrow cavities such as pump housings and turbine housings during grinding, effectively removing coatings or burrs and significantly improving the surface cleaning quality of lost foam castings. The handheld part is for the operator to hold, and the angle adjustment mechanism adjusts the angle of the rotating part, allowing the grinding head to rotate to a suitable angle to fit the cavity for grinding. The power unit provides power to the rotating part and the grinding head.
[0016] The grinding head and the connecting part of this utility model are detachably connected, which makes it easy to replace grinding heads of different sizes according to the internal cavity environment, so that the grinding head can fit and reach complex curved surfaces or dead corner areas, and achieve all-round grinding. Attached Figure Description
[0017] Figure 1 This is a three-dimensional structural schematic diagram of Example 1; Figure 2 This is a partial exploded view of the structure of Example 1; Figure 3 for Figure 2 Enlarged view of point A; Figure 4 This is a schematic diagram of the structure of Example 2; The markings in the diagram are as follows: 1 Handheld part, 2 Angle adjustment mechanism, 2-1 Ear plate, 2-2 Mounting plate, 2-3 Connecting hole, 2-4 Locking hole, 2-5 Pin, 2-6 Fixing hole, 2-7 Fixing bolt, 2-8 Arc groove, 3 Connecting part, 4 Power part, 4-1 Housing, 4-2 Cover plate, 5 Rotating part, 5-1 Internal threaded tube, 6 Grinding head, 6-1 Stud, 7 Expansion part, 8 Anti-slip strip. Detailed Implementation
[0018] To better understand the purpose, structure, and function of this utility model, a clear and complete description of this utility model will be provided below in conjunction with the accompanying drawings.
[0019] Example 1 like Figures 1-3 The present invention relates to a grinding device for the production of lost foam castings, comprising: a hand-held part 1, an angle adjustment mechanism 2, a connecting part 3, a power part 4, a rotating part 5, and a grinding head 6; in this embodiment, the hand-held part 1, the connecting part 3, and the rotating part 5 are all cylindrical.
[0020] The handle 1 is used by the operator to hold and grasp the device. Furthermore, the upper part of the handle 1 is provided with several anti-slip strips 8 to improve grip stability. The lower part of the handle 1 is connected to the upper part of the connecting part 3 through the angle adjustment mechanism 2, which is used to adjust the relative angle between the handle 1 and the connecting part 3.
[0021] Specifically, the angle adjustment mechanism 2 includes two ear plates 2-1 disposed at the lower part of the handheld part 1, mounting plates 2-2 respectively located on the outer side of the two ear plates 2-1, and a connecting hole 2-3 and a locking hole 2-4 disposed on the connecting part 3; The connecting part 3 is provided between the two ear plates 2-1, and the connecting hole 2-3 on the connecting part 3 is hinged to the two ear plates 2-1 by a pin 2-5. Therefore, the connecting part 3 can rotate around the axis of the pin 2-5. The two mounting plates 2-2 are provided with positioning components that cooperate with the locking hole 2-4. The positioning components lock and fix the connected part 3 after rotation. In specific processing, the ear plate 2-1 and the hand-held part 1 are integrally formed, and the two mounting plates 2-2 are welded to the outer side of the two ear plates 2-1.
[0022] In this embodiment, the positioning component includes a plurality of fixing holes 2-6 disposed on the mounting plate 2-2 and fixing bolts 2-7 connected to the fixing holes 2-6 and the locking holes 2-4; the plurality of fixing holes 2-6 are arranged in an arc with the center of the connecting hole 2-3 as the center; and the central angle of the arc is equal to or greater than 90°, so that the rotating part 5 can be rotated to a position perpendicular to the hand-held part 1 and on the same axis. The fixing bolts 2-7 pass through the fixing holes 2-6, the locking holes 2-4 on the first mounting plate 2-2 and the fixing holes 2-6 on the second mounting plate 2-2 in sequence and are then locked by nuts, thereby locking and fixing the rotating part 5; furthermore, the connecting part 3 is provided with an expansion part 7, the expansion part 7 is provided with the locking holes 2-4, and the expansion part 7 contacts the two mounting plates 2-2, increasing the stability of the fixing bolts 2-7 locking.
[0023] The bottom of the connecting part 3 is connected to the power part 4, and the power part 4 is connected to the top of the rotating part 5 to drive the rotating part 5 to rotate. Specifically, the power part 4 includes a protective shell and a motor located inside the protective shell; the top of the protective shell is connected to the bottom of the connecting part 3, and the motor inside passes through the bottom of the protective shell and is coaxially connected to the rotating part 5. The motor is of the energy storage power supply type, and a switch electrically connected to the motor is provided on this device to control the start and stop of the motor. This connection is a common method in the electromechanical field and will not be described in detail here. To facilitate the inspection and maintenance of the motor, the protective shell includes a shell 4-1 and a cover plate 4-2. The cover plate 4-2 is detachably connected to the top of the shell 4-1, and the top of the shell 4-1 is connected to the bottom of the connecting plate. The motor is installed inside the shell 4-1, and the output shaft of the motor passes through the bottom of the shell 4-1 and is coaxially connected to the rotating part 5.
[0024] The rotating part 5 is elongated and has the grinding head 6 at its bottom. During grinding, the grinding head 6 can be driven to extend into narrow cavities such as the pump housing and turbine housing 4-1 to grind the paint or burrs in the cavity. The grinding head 6 is spherical. In this embodiment, the rotating part 5 and the grinding head 6 are detachably connected, which facilitates the replacement of different sized grinding heads 6 according to the cavity environment, allowing the grinding head 6 to fit and reach complex curved surfaces or dead corner areas, achieving all-round grinding. Furthermore, the bottom of the rotating part 5 is provided with an internally threaded tube 5-1, and the grinding head 6 is provided with a stud 6-1 adapted to the internally threaded tube 5-1; the rotating part 5 and the grinding head 6 are detachably connected to the internally threaded tube 5-1 through the stud 6-1; the internally threaded tube 5-1 and the stud 6-1 are also provided with threaded holes perpendicular to their axial direction, through which screws or bolts pass to prevent the connection between the stud 6-1 and the internally threaded tube 5-1 from being opened when the rotating part 5 rotates.
[0025] During actual grinding, first select a suitable device according to the size of the inner cavity of the casting, with the diameter of the rotating part 5 and the grinding head 6 being smaller than the size of the inner cavity; then select grinding heads 6 of different sizes as needed to grind the inner cavity of the casting and remove the coating or burrs.
[0026] Example 2 In Embodiment 2, the same symbols are used for the same structures as in Embodiment 1, and the same descriptions are omitted. The only difference between Embodiment 2 and Embodiment 1 is the structure of the positioning component.
[0027] like Figure 4 As shown, the positioning assembly includes an arc-shaped groove 2-8 disposed on the mounting plate 2-2 and a fixing bolt 2-7 connected to the fixing hole 2-6 and the locking hole 2-4; the arc-shaped groove 2-8 is centered on the center of the connecting hole 2-3. The central angle of the arc-shaped groove 2-8 is equal to or greater than 90°, allowing the rotating part 5 to rotate to a position perpendicular to the handheld part 1 and on the same axis; the fixing bolt 2-7 passes through the fixing hole 2-6, the locking hole 2-4 on the first mounting plate 2-2 and the fixing hole 2-6 on the second mounting plate 2-2 in sequence and is then locked by a nut, thereby locking and fixing the rotating part 5.
[0028] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific circumstances and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.
Claims
1. A grinding device for producing lost foam castings, characterized in that: It includes: Handheld part (1), angle adjustment mechanism (2), connecting part (3), power part (4), rotating part (5) and grinding head (6); The lower part of the handheld part (1) is connected to the upper part of the connecting part (3) through the angle adjustment mechanism (2), which is used to adjust the relative angle between the handheld part (1) and the connecting part (3); the bottom of the connecting part (3) is connected to the power part (4), and the power part (4) is connected to the top of the rotating part (5) to drive the rotating part (5) to rotate; the rotating part (5) is long and has the grinding head (6) at its bottom.
2. The grinding device for producing lost foam castings according to claim 1, characterized in that: The rotating part (5) is detachably connected to the grinding head (6).
3. A grinding device for producing lost foam castings according to claim 2, characterized in that: The bottom of the rotating part (5) is provided with an internal thread tube (5-1), and the grinding head (6) is provided with a stud (6-1) that is compatible with the internal thread tube (5-1). The rotating part (5) and the grinding head (6) are detachably connected to the internally threaded tube (5-1) via the stud (6-1).
4. A grinding device for producing lost foam castings according to claim 1, characterized in that: The angle adjustment mechanism (2) includes two ear plates (2-1) disposed at the lower part of the hand-held part (1), mounting plates (2-2) respectively located on the outer side of the two ear plates (2-1), and connecting holes (2-3) and locking holes (2-4) disposed on the connecting part (3). The connecting part (3) is provided between the two ear plates (2-1), and the connecting hole (2-3) on the connecting part (3) is hinged to the two ear plates (2-1) by a pin (2-5); the two mounting plates (2-2) are provided with positioning components that cooperate with the locking hole (2-4).
5. A grinding device for producing lost foam castings according to claim 4, characterized in that: The positioning component includes a plurality of fixing holes (2-6) provided on the mounting plate (2-2) and fixing bolts (2-7) connected to the fixing holes (2-6) and the locking holes (2-4); the plurality of fixing holes (2-6) are arranged in an arc with the center of the connecting hole (2-3) as the center; Alternatively, the positioning component includes an arcuate groove (2-8) disposed on the mounting plate (2-2) and a fixing bolt (2-7) connected to the fixing hole (2-6) and the locking hole (2-4); the arcuate groove (2-8) is centered on the center of the connecting hole (2-3).
6. A grinding device for producing lost foam castings according to claim 4, characterized in that: The connecting part (3) is provided with an expansion part (7), the expansion part (7) is provided with the locking hole (2-4), and the expansion part (7) is in contact with the two mounting plates (2-2).
7. A grinding device for producing lost foam castings according to claim 1, characterized in that: The power unit (4) includes a protective shell and a motor located inside the protective shell; The top of the protective shell is connected to the bottom of the connecting part (3), and the motor inside it passes through the bottom of the protective shell and is coaxially connected to the rotating part (5).
8. A grinding device for producing lost foam castings according to claim 7, characterized in that: The protective shell includes a shell (4-1) and a cover plate (4-2). The cover plate (4-2) is detachably connected to the top of the shell (4-1), and the top of the shell (4-1) is connected to the bottom of the connecting part (3).
9. A grinding device for producing lost foam castings according to claim 1, characterized in that: The upper part of the handheld part (1) is provided with several anti-slip strips (8).
10. A grinding device for producing lost foam castings according to claim 1, characterized in that: The grinding head (6) is spherical.