Casting exhaust structure at piston oil duct hole part
By cutting a 0.2mm wide exhaust groove in the oil channel hole of the piston inner mold, the loosening and clogging problems caused by traditional exhaust methods are solved, efficient exhaust effect is achieved, and the piston forming quality and production efficiency are improved.
Patent Information
- Application Number
- CN202422752478.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-11-12
AI Technical Summary
Traditional exhaust methods have problems with loosening, clogging and straining in the piston oil channel holes, resulting in poor forming quality, increased production costs and scrap rate.
A 0.2mm wide exhaust groove is cut at the oil channel hole in the inner mold of the piston. The exhaust hole and the oil channel hole are connected through the exhaust groove to achieve rapid exhaust and avoid aluminum sticking and strain.
The appearance quality of the piston is improved, the scrap rate and production cost are reduced, and the production efficiency is improved.
Smart Images
Figure CN223368146U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of casting and forming, in particular to a casting exhaust structure at a piston oil channel hole. Background Art
[0002] In the manufacturing process of oil-channel pistons, the casting of the internal oil channel holes has always been a technical challenge. Due to the special design of the piston mold in this area, an "exhaust" operation is required during the casting process to ensure the integrity and smooth formation of the casting. The traditional exhaust method is to drill exhaust holes in the mold and tighten them with exhaust pins. However, in actual production, this exhaust method has many problems.
[0003] First, since it is difficult to ensure that the vent pin and the vent hole are perfectly aligned, the vent pin is prone to loosening during the casting process. This loosening not only causes aluminum sticking to the mold during casting, but also damages the oil channel hole of the piston blank, seriously affecting the appearance quality of the piston.
[0004] Secondly, traditional venting methods can easily clog the oil passages. Since the vent pins are small in diameter and easily loosen or fall off during use, they can easily leave residue in the oil passages, causing blockage and affecting the normal use of the piston.
[0005] Furthermore, the aforementioned issues with traditional exhaust methods require significant labor for polishing and repair during the production process, increasing production costs and reducing efficiency. Furthermore, the high scrap rate negatively impacts the company's economic performance. Utility Model Content
[0006] The utility model aims to provide a cast exhaust structure at the oil passage hole of a piston, so as to solve the problem of poor forming quality in the prior art.
[0007] The utility model is realized by adopting the following technical scheme: a cast exhaust structure at the oil channel hole of a piston, characterized in that it comprises an oil channel hole and an exhaust hole, an exhaust groove is provided between the oil channel hole and the exhaust hole, and the exhaust hole and the oil channel hole are connected through the exhaust groove.
[0008] Furthermore, the exhaust hole is arranged in parallel with the oil channel hole.
[0009] Furthermore, the exhaust groove is located on a plane defined by the axis of the exhaust hole and the oil channel hole.
[0010] Furthermore, the width of the exhaust groove is 0.2 mm.
[0011] Furthermore, the exhaust groove is formed by wire cutting.
[0012] Furthermore, the oil channel hole includes an oil outlet hole and an oil inlet hole, and there are two exhaust holes, which are respectively connected to the oil outlet hole and the oil inlet hole through two exhaust grooves.
[0013] Furthermore, the two exhaust slots are parallel to each other.
[0014] The beneficial effects of the cast exhaust structure at the piston oil passage hole of the utility model include:
[0015] This solves the problem of aluminum sticking and scratching in the piston's inner oil passage: By using wire cutting to create a 0.2mm-wide air groove in the piston's inner mold oil passage, the mold is quickly vented during casting, avoiding aluminum sticking and scratching caused by poor venting. This not only improves the piston's appearance but also reduces the economic losses caused by scrap.
[0016] Improved piston blank molding quality: The use of a new exhaust method allows the mold to better exhaust gas during the casting process, avoiding casting defects caused by gas stagnation. At the same time, the moderate width of the gas groove can meet the exhaust requirements without affecting the strength of the casting, thereby improving the molding quality of the piston blank.
[0017] Reduced production costs and improved production efficiency: The new exhaust method reduces the grinding and repair costs caused by scrap, while also improving production efficiency. In addition, because the process technology is simple to operate and easy to implement, it can be quickly promoted and applied in actual production processes. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. The drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.
[0019] Figure 1 This is a schematic cross-sectional view of a cast exhaust structure at the oil passage hole of a piston;
[0020] Figure 2 A schematic top view of a cast exhaust structure at the oil passage hole of a piston;
[0021] In the figure, 1-inner mold; 2-oil outlet hole; 3-oil inlet hole; 4-exhaust groove; 5-exhaust hole. DETAILED DESCRIPTION
[0022] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.
[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.
[0024] like Figure 1-2 As shown, a cast exhaust structure at the oil channel hole of a piston includes an inner mold 1, an oil outlet hole 2, an oil inlet hole 3, an exhaust groove 4 and an exhaust hole 5. The exhaust holes 5 have two holes that are respectively arranged parallel to the oil outlet hole 2 and the oil inlet hole 3. The exhaust groove 4 connects the oil outlet hole 2 with the exhaust hole 5 and the oil inlet hole 3 with the exhaust hole 5 respectively.
[0025] In this embodiment, inner mold 1 utilizes an R105-011 piston inner mold. Because the oil passage holes in the piston inner mold present difficulties during casting, "air venting" is required. Traditionally, this is accomplished by inserting Φ3 air pins. Specifically, the mold design requires six Φ3 holes drilled in the oil passage holes, which are then tightly fitted with six Φ3 air vent pins. However, in practice, the fit between the air vent pins and the air holes varies, making it prone to loosening during piston casting, resulting in aluminum sticking to the mold and strain on the piston cavity.
[0026] In this embodiment, the six Φ3 holes and six Φ3 vent pins between the oil passage hole and the vent hole 5 are eliminated. Instead, a 0.2mm wide vent groove 4 is cut in the piston inner mold 1 at the oil passage hole location using wire cutting, enabling rapid "venting" of the mold during casting. This improvement allows for rapid "venting" during casting, resolving the difficulty in forming the piston oil passage hole and the problem of strain in the piston inner cavity. This improves the appearance quality of the piston blank and reduces the cost of manual grinding of the piston blank.
[0027] The above embodiments describe the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Without departing from the spirit and scope of the present invention, modifications and variations made by those skilled in the art without departing from the spirit and scope of the present invention should be within the scope of protection of the appended claims.
Claims
1. A cast exhaust structure at the piston oil channel hole, characterized in that: It comprises an oil passage hole and an exhaust hole (5), wherein an exhaust groove (4) is provided between the oil passage hole and the exhaust hole (5), and the exhaust hole (5) is connected to the oil passage hole via the exhaust groove (4).
2. A piston oil channel hole casting exhaust structure according to claim 1, characterized in that: The exhaust hole (5) is arranged in parallel with the oil channel hole.
3. The piston oil passage hole casting exhaust structure according to claim 1, characterized in that: The exhaust groove (4) is located on a plane defined by the axis of the exhaust hole (5) and the oil channel hole.
4. The piston oil channel hole casting exhaust structure according to claim 1, characterized in that: The width of the exhaust groove (4) is 0.2 mm.
5. The piston oil channel hole casting exhaust structure according to claim 1, characterized in that: The exhaust groove (4) is formed by wire cutting.
6. The piston oil passage hole casting exhaust structure according to claim 1, characterized in that: The oil channel hole comprises an oil outlet hole (2) and an oil inlet hole (3), and there are two exhaust holes (5). The two exhaust holes (5) are respectively connected to the oil outlet hole (2) and the oil inlet hole (3) through two exhaust grooves (4).
7. A piston oil passage hole casting exhaust structure according to claim 6, characterized in that: The two exhaust grooves (4) are parallel to each other.