Die structure for increasing strength of ejector rod at position of axle housing oil baffle plate
By designing a mold structure that enhances the strength of the top rod and exhaust area, the problem of insufficient sand core strength at the oil stop plate in the bridge shell structure is solved, and the molding quality and stability of the casting are ensured.
Patent Information
- Application Number
- CN202422223445.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-10
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-09-10
AI Technical Summary
The sand core at the oil barrier position in the bridge shell structure is easily washed out during casting, resulting in poor quality of casting.
A mold structure is designed, in which the bottom of the top rod is a dome rod and the top of the top rod is a flat top rod, and the two sides of the top rod are cut off to enhance the overall strength of the top rod and increase the exhaust area through the flat top rod.
The overall strength of the top rod is greatly enhanced, and by increasing the exhaust area, the forming quality of the bridge shell sand core is ensured, and the erosion defects caused by insufficient sand core strength are avoided.
Smart Images
Figure CN223043582U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of axle housing manufacturing, in particular to a die structure for increasing the strength of a ejector rod at the position of an axle housing oil baffle. Background Art
[0002] In casting production, cores are generally used, and the functions of the cores are as follows: forming the inner cavity and holes of the casting. For some inner cavities with complex shapes, cores must be used to form them, which is an extremely important function of the cores; forming the outer shape of the casting. For castings with complex outer shapes, such as those with many bosses and bumps that hinder mold removal and are not easy to disassemble loose pieces, as well as those with complex curved surface shapes, when it is difficult to make the outer mold, cores are often used to form the outer shape of the casting. Strengthening the strength of the local sand mold. When casting large and medium-sized castings, the sprue is generally very high, the scouring force of the metal is very large, and the scouring time for the same place is also relatively long. The cores in these places are often washed out due to insufficient strength. Therefore, in order to ensure the quality of the casting and prevent defects such as scouring, high-strength core blocks are often embedded in places with strong scouring force.
[0003] In some axle housing structures, there is a position of an oil baffle, and the core shows a narrow pit at the edge of the core, which increases the difficulty of core making and die structure making.
[0004] Therefore, we propose a die structure for increasing the strength of the ejector rod at the position of the axle housing oil baffle. Content of the Utility Model
[0005] The applicant of the present utility model aims at the above-mentioned disadvantages in the existing production technology and provides a die structure for increasing the strength of the ejector rod at the position of the axle housing oil baffle. The bottom of the ejector rod is a round ejector rod, and the top of the ejector rod is a flat ejector rod. The top of the ejector rod is made by cutting off two sides of the round ejector rod, which greatly enhances the overall strength of the ejector rod. Moreover, compared with the small round ejector rod, the flat ejector rod at the top of the ejector rod greatly increases the exhaust area, providing a technical guarantee for the forming of the axle housing core.
[0006] The technical solution adopted by the present utility model is as follows:
[0007] A die structure for increasing the strength of the ejector rod at the position of the axle housing oil baffle, comprising:
[0008] An axle housing core box for making an axle housing core. The axle housing core is provided with a narrow pit, and an oil baffle is arranged on the axle housing core box. The oil baffle is in a narrow groove at the edge of the parting surface of the axle housing core box;
[0009] Wherein, a groove is arranged at the bottom of the oil baffle, and exhaust holes are arranged in the groove; an ejector rod is arranged at the bottom of the axle housing core box. The top of the ejector rod is a flat ejector rod. The flat ejector rod of the ejector rod is used to eject the axle housing core, and there is a gap between the flat ejector rod of the ejector rod and the exhaust holes for exhausting air.
[0010] It is further characterized in that:
[0011] The bottom of the ejector rod is a round ejector rod, and the top of the ejector rod is a flat ejector rod made by cutting two edges of the round ejector rod, which greatly enhances the overall strength of the ejector rod.
[0012] The flat ejector rod at the top of the ejector rod greatly increases the exhaust area relative to the small round ejector rod, facilitating the forming of the axle housing core.
[0013] The concave pit is located at the local edge of the axle housing core.
[0014] The beneficial effects of the present utility model are as follows:
[0015] The structure of the present utility model is compact and reasonable, and it is convenient to operate. The bottom of the ejector rod is a round ejector rod, and the top of the ejector rod is a flat ejector rod made by cutting two edges of the round ejector rod, which greatly enhances the overall strength of the ejector rod. Moreover, the flat ejector rod at the top of the ejector rod greatly increases the exhaust area relative to the small round ejector rod, providing a technical guarantee for the forming of the axle housing core. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a schematic structural diagram of the present utility model.
[0017] Figure 2 is a schematic diagram of the axle housing core of the present utility model.
[0018] Figure 3 is Figure 2 an enlarged schematic diagram at A in
[0019] Figure 4 is a schematic diagram of the oil baffle of the present utility model.
[0020] Figure 5 is Figure 4 a top view of
[0021] Figure 6 is Figure 5 a schematic cross-sectional view taken along the line B-B in
[0022] Figure 7 is a schematic diagram of the ejector rod of the present utility model.
[0023] Figure 8 is a schematic diagram of the flat ejector rod and the small round ejector rod of the present utility model.
[0024] Wherein: 1. Axle housing core box; 101. Oil baffle; 102. Groove; 103. Exhaust hole; 2. Axle housing core; 201. Concave pit; 3. Ejector rod. DETAILED DESCRIPTION OF THE INVENTION
[0025] The following will describe the detailed implementation manners of the present utility model with reference to the accompanying drawings.
[0026] As shown Figures 1 - 8 in the figure, a mold structure for increasing the strength of a push rod at the position of an oil baffle of a axle housing includes an axle housing core box 1, and an axle housing sand core 2 is made through the axle housing core box 1.
[0027] As shown Figure 2 and Figure 3 in the figure, a pit 201 is arranged on the axle housing sand core 2. The pit 201 is relatively narrow and is located at the local edge of the axle housing sand core 2, which increases the difficulty of manufacturing the axle housing sand core 2 and the structure of the axle housing core box 1.
[0028] An oil baffle 101 is arranged on the axle housing core box 1. The oil baffle 101 is close to the narrow groove at the edge of the parting surface of the axle housing core box 1. The forming of the sand core at the narrow groove position is more difficult, and sufficient exhaust is required to stably obtain a qualified axle housing sand core 2.
[0029] A groove 102 is arranged at the bottom of the oil baffle 101, and an exhaust hole 103 is arranged in the groove 102. Considering the forming and ejection of the axle housing sand core 2, a push rod 3 must be used. The first function of the push rod 3 is to exhaust. The gap between the outer periphery of the push rod 3 and the exhaust hole 103 is used for exhausting, so that the axle housing sand core 2 is well formed; the second function is to eject the core. The strength of the axle housing sand core 2 at the groove 102 is relatively weak, and the push rod 3 can effectively eject the axle housing sand core 2, so that the axle housing sand core 2 remains intact.
[0030] Since the position of the groove 102 is small, if a round push rod is used for the push rod 3, the diameter of the push rod 3 is small. The push rod 3 not only has a small exhaust area and is insufficient to discharge the gas in this area, but also the strength of the push rod 3 is insufficient, and it is easy to cause bending or even fracture during use, which will bring certain hidden troubles of shutdown to the production of the axle housing sand core 2.
[0031] The bottom of the push rod 3 is a round push rod, and the top of the push rod 3 is a flat push rod. The top of the push rod 3 is made by cutting two sides of the round push rod, which greatly enhances the overall strength of the push rod 3. Moreover, compared with the small round push rod, the flat push rod at the top of the push rod 3 greatly increases the exhaust area, providing a technical guarantee for the forming of the axle housing sand core 2.
[0032] As shown Figure 8 in the figure, when the space at the groove 102 is limited, using a flat push rod at the top of the push rod 3 has a larger exhaust circumference than using a small round push rod. With the same exhaust gap, the exhaust area of the flat push rod is larger, and thus the exhaust can be faster.
[0033] The above description is an explanation of the present invention, not a limitation of the invention. The scope defined by the present invention is referred to the claims. Any form of modification can be made within the protection scope of the present invention.
Claims
1. A mold structure for increasing the strength of the ejector rod at the oil baffle plate position of the bridge housing, characterized in that: include: A bridge shell core box (1) is used to make a bridge shell sand core (2), the bridge shell sand core (2) is provided with a relatively narrow pit (201), and an oil baffle plate (101) is provided on the bridge shell core box (1), and the oil baffle plate (101) is located in a narrow groove at the edge of the parting surface of the bridge shell core box (1); The bottom of the oil baffle plate (101) is provided with a groove (102), and the groove (102) is provided with an exhaust hole (103); the bottom of the axle housing core box (1) is provided with a push rod (3), the top of the push rod (3) is a flat push rod, the flat push rod of the push rod (3) is used to push out the axle housing sand core (2), and there is a gap between the flat push rod of the push rod (3) and the exhaust hole (103) for exhaust.
2. A mold structure for increasing the strength of the ejector rod at the oil baffle plate position of the axle housing as claimed in claim 1, characterized in that: The bottom of the push rod (3) is a round push rod, and the top of the push rod (3) is a flat push rod made by cutting off two sides of the round push rod, which greatly enhances the overall strength of the push rod (3).
3. A mold structure for increasing the strength of the push rod at the oil baffle plate position of the bridge housing as claimed in claim 1, characterized in that: The flat top rod at the top of the top rod (3) greatly increases the exhaust area compared to the small round top rod, thus facilitating the molding of the bridge housing sand core (2).
4. A mold structure for increasing the strength of the push rod at the oil baffle plate position of the bridge housing as claimed in claim 1, characterized in that: The recess (201) is located at a local edge of the bridge housing sand core (2).