Casting inner cavity burr polishing device
By designing a cast cavity burr grinding device combining a flexible spring rod and a casting cavity with a tip grinding head, the problem of difficulty in polishing complex cavity in the prior art is solved, and efficient and safe grinding effect is achieved, and production efficiency and safety are improved.
Patent Information
- Application Number
- CN202421035540.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-05-14
AI Technical Summary
The existing casting cavity grinding devices are difficult to effectively polish the casting cavity of complex shapes, especially the corners, and the rigid connection of the grinding head results in low grinding efficiency at irregular burrs, which poses a risk of grinding and safety.
A casting inner cavity burrs grinding device is designed, and a structure is adopted for combining a flexible spring rod with a polishing head with a tip. The polishing head includes a pointed head, a spherical part and a connecting tail. A multi-edged structure is provided on the pointed head and spherical part, connecting the tail to the flexible spring rod, achieving flexible entry and efficient polishing of complex inner cavity.
The device can easily enter the inner cavity of the casting with complex shapes, pierce the burrs from the pointed head and grind it with a multi-edge structure, achieving efficient grinding of the inner cavity of the casting, improving production efficiency and safety, and reducing the scrap rate of the casting.
Smart Images
Figure CN222644189U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of casting production, in particular to a device for grinding burrs of inner cavities of castings. Background Art
[0002] When hydraulic parts are cast, the internal oil circuit of the casting is crisscrossed horizontally and vertically. It is generally made of sand cores. During the pouring process, the sand core is subjected to high temperature and is easy to expand, causing cracks on the surface, leading to the intrusion of molten iron. The shape of the oil circuit will form defects such as burrs during the casting process, which needs to be polished by a polishing device, etc. However, the structure and function of the existing polishing device are relatively simple and have the following shortcomings:
[0003] 1. Conventional grinding heads usually grind the burrs of straight inner cavities, but many casting cavities have corners. Although they can be partially avoided by reducing the diameter, it is difficult for conventional grinding devices to completely grind them in place;
[0004] 2. The grinding heads are rigidly connected, and the burrs inside the castings are irregular. When grinding, they are easily deviated from the original position after being subjected to unilateral force, causing eccentric grinding. The burrs must be flushed away in advance with a sharp iron rod before grinding and repair. This method is inefficient, wastes time and poses a safety hazard. Utility Model Content
[0005] The utility model aims to provide a device for grinding burrs in the inner cavity of a casting, so as to solve the problems raised in the above-mentioned background technology.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] The utility model provides a device for grinding burrs in the inner cavity of a casting, comprising a grinding head and a flexible spring rod, wherein the grinding head comprises a pointed portion, a spherical portion and a connecting tail portion, wherein the pointed portion and the spherical portion are provided with a multi-blade structure, and the connecting tail portion is connected to one end of the flexible spring rod.
[0008] Furthermore, the flexible spring rod is made of tungsten steel, and the flexible spring rod and the grinding head are in interference fit.
[0009] Furthermore, the pointed portion is conical, the cone angle of the pointed portion is 75 degrees, and the tip of the pointed portion has a chamfer.
[0010] Furthermore, the multi-blade structure includes a plurality of axial blades equidistantly arranged around the pointed portion and the spherical portion.
[0011] Furthermore, the connection between the connecting tail and the spherical portion has an arc-shaped transition.
[0012] Furthermore, the pointed portion, the spherical portion and the connecting tail portion are an integrally formed structure.
[0013] Beneficial effects: A device for grinding burrs in the inner cavity of a casting, which can easily enter the inner cavity of a casting with a complex shape through a structure combining a flexible spring rod and a grinding head with a pointed end, pierce the burrs through the pointed end of the grinding head, guide the grinding head to the center of the pipeline, and grind in place with high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0015] Figure 2 It is a partial structural schematic diagram of the utility model;
[0016] Figure 3 It is a schematic diagram of grinding the inner cavity of a casting of the present invention.
[0017] Reference numerals
[0018] 1-grinding head, 11-pointed part, 12-spherical part, 13-connecting tail, 14-multi-blade structure, 2-flexible spring rod. DETAILED DESCRIPTION
[0019] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
[0020] Example
[0021] like Figure 1-3 As shown, a device for grinding burrs in the inner cavity of a casting comprises a grinding head 1 and a flexible spring rod 2. The grinding head 1 comprises a pointed portion 11, a spherical portion 12 and a connecting tail 13. The pointed portion 11 and the spherical portion 12 are provided with a multi-blade structure 14. The connecting tail 13 is connected to one end of the flexible spring rod 2.
[0022] The flexible spring rod 2 is made of tungsten steel and has an interference fit with the grinding head 1, so it will not fall off during the grinding process, replacing the original screw fixing method, which is easy to loosen and affect the grinding efficiency.
[0023] The pointed portion 11 is conical, and the cone angle of the pointed portion 11 is 75 degrees, so that the cutting angle is more powerful and the grinding speed is faster. The tip of the pointed portion 11 has a chamfer, and the chamfer radius is 0.5 mm.
[0024] The multi-blade structure 14 includes a plurality of axial blades equidistantly arranged around the pointed portion 11 and the spherical portion 12. One end of the plurality of axial blades extends to the end of the pointed portion 11, and a certain distance is left between the other end and the connecting tail 13. The connecting tail 13 and the spherical portion 12 have an arc-shaped transition at the connection. The pointed portion 11, the spherical portion 12 and the connecting tail 13 are an integrally formed structure.
[0025] When in use, first check the casting through an endoscope to determine the fleshy and burred areas in the inner cavity of the casting, then fix the grinding head device to a pistol drill or a pneumatic gun, first use the flexibility of the flexible spring rod 2 to easily enter the grinding and repair area, then use the pointed part 11 of the grinding head 1 to break the burrs, and finally use the multi-blade structure 14 on the pointed part 11 and the spherical part 12 to grind away the areas that need to be repaired. The spherical part 12 of the grinding head is set to be circular to avoid damaging the inner cavity of the casting, reduce the scrap rate caused by the inability to grind and repair the inside of the casting, facilitate employees' operations, and improve production efficiency while also improving production safety.
[0026] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the utility model content within the protection scope of the utility model.
Claims
1. A device for grinding burrs in the inner cavity of a casting, characterized in that: The invention comprises a grinding head (1) and a flexible spring rod (2), wherein the grinding head (1) comprises a pointed portion (11), a spherical portion (12) and a connecting tail portion (13), wherein the pointed portion (11) and the spherical portion (12) are provided with a multi-blade structure (14), the connecting tail portion (13) is connected to one end of the flexible spring rod (2), and the multi-blade structure (14) comprises a plurality of axial blades arranged at equal distances around the pointed portion (11) and the spherical portion (12).
2. A casting inner cavity burr grinding device according to claim 1, characterized in that: The flexible spring rod (2) is made of tungsten steel, and the flexible spring rod (2) and the grinding head (1) are in interference fit.
3. A casting inner cavity burr grinding device according to claim 1, characterized in that: The pointed portion (11) is conical, the cone angle of the pointed portion (11) is 75 degrees, and the tip of the pointed portion (11) has a chamfer.
4. A casting inner cavity burr grinding device according to claim 1, characterized in that: The connection between the connecting tail portion (13) and the spherical portion (12) has an arc-shaped transition.
5. The device for grinding burrs in the inner cavity of a casting according to claim 1, characterized in that: The pointed portion (11), the spherical portion (12) and the connecting tail portion (13) are an integrally formed structure.