Round-corner Flywheel Modeling Process

Abstract

The present invention provides a rounding flywheel modeling process, and the modeling process includes processes such as placing an annular plate wooden pattern and a rounding flywheel wooden pattern, filling a sand mold, flipping the lower sand mold, manufacturing an upper sand mold and an annular plate sand core, flipping the upper sand mold, and closing the mold. Among them, the annular plate sand core cooperates with the upper sand mold and the lower sand mold to realize the positioning of the upper sand mold and the lower sand mold. The technical solution described in the present invention can avoid the offset of the sand mold caused during the cooperation process of the upper sand mold and the lower sand mold, and greatly improve the working quality and working efficiency.

Description

Technical Field

[0001] This application relates to the field of casting processes for rounded flywheels, and particularly to an improved process for casting rounded flywheels. Background Art

[0002] Currently, when casting a rounded flywheel with a frustum shape, the upper and lower molds are generally made with the plane where the cross-section with the largest diameter of the rounded flywheel is located as the parting surface. However, in the process of mold closing, it is extremely easy for the upper and lower molds to be misaligned, resulting in defects in the rounded structure of the rounded flywheel, and mechanical processing is required in the later stage to meet the casting design requirements; when the defects are serious, it may even lead to the scrapping of the rounded flywheel parts. Summary of the Invention

[0003] In view of the above problems, the purpose of this application is to provide a casting process for rounded flywheels to solve the stability problem of the process of forming a rounded corner in the sand mold during the casting of a rounded flywheel with a frustum shape.

[0004] To achieve the above object, the molding process for the rounded flywheel provided in this application adopts the following process plan:

[0005] A casting method for a rounded flywheel, the wooden pattern of the rounded flywheel is frustum-shaped, there is a first rounded corner between the large end face and the side face of the wooden pattern of the rounded flywheel, and there is a second rounded corner between the small end face and the side face of the wooden pattern of the rounded flywheel. The process steps are as follows:

[0006] a. Place the annular plate wooden pattern and the rounded flywheel wooden pattern. In this step, the inner side surface of the annular plate wooden pattern cooperates with and contacts the first rounded corner, and the annular plate wooden pattern is located at the bottom of the sand box;

[0007] b. Fill in molding sand. Pour sand into the sand box with the annular plate wooden pattern and the rounded flywheel wooden pattern at the bottom to form the lower sand mold;

[0008] c. Flip the lower sand mold, take out the annular plate wooden pattern and the rounded flywheel wooden pattern, forming a cavity with the shapes of the annular plate wooden pattern and the rounded flywheel wooden pattern. The cavity formed by taking out the annular plate wooden pattern is the first cavity part, and the cavity formed by taking out the rounded flywheel wooden pattern is the second cavity part;

[0009] d. Make the upper sand mold. There is a groove at the top of the upper sand mold, and the groove is an annular groove; fix the annular plate core by hanging the core at the groove. The annular plate core is an integral annular plate core formed by a first annular plate core part and a second annular plate core part; the first annular plate core part matches the groove structure in the upper sand mold; the inner side surface of the second annular plate core part is an arc surface; the arc surface is used to form the rounded corner between the large end face and the side face of the rounded flywheel casting;

[0010] e. Mold clamping. Place the upper sand mold on the lower sand mold so that the annular plate core at the bottom of the upper sand mold fits into the cavity of the lower sand mold with the shape of the annular plate wooden mold and the fillet flywheel wooden mold.

[0011] f. Complete the molding. Then, through the conventional pouring process, finally produce the fillet flywheel with the required shape.

[0012] Preferably, the inner diameter dimension of the annular groove near the top of the upper sand mold is larger than the inner diameter dimension of the annular groove far from the top of the upper sand mold. This structure is beneficial for fixing the annular plate core.

[0013] Preferably, the outer side surface of the second annular plate core part is matched with the outer side surface of the first cavity part; the bottom surface of the second annular plate core part is matched with the bottom surface of the first cavity part, and the second annular plate core part just fits into the first cavity part.

[0014] Preferably, the top end of the upper sand mold is provided with an upper sand mold protrusion part.

[0015] Preferably, after the annular plate core is hoisted to the groove in step d, change the shape of the arc surface of the second annular plate core part, and the inner side surface of the second annular plate core part can be adjusted according to actual needs; the arc surface is used to form the fillet between the large end face and the side face of the designed fillet flywheel casting.

[0016] Preferably, before filling the mold with sand, anti-adhesive material needs to be sprinkled in the sand box. To prevent the sand from sticking to the wooden mold.

[0017] Preferably, before flipping the upper sand mold and the lower sand mold, parting sand needs to be sprinkled on the surfaces of the upper sand mold and the lower sand mold to prevent the upper sand mold and the lower sand mold from being unable to separate during the mold parting process.

[0018] Preferably, a hoisting hole penetrating the upper sand mold is provided in the annular groove, the annular plate core is hoisted to the groove by bolts, the bolts are located in the hoisting holes of the upper sand mold, and are fixed to the top of the upper sand mold by nuts.

[0019] Preferably, the inner side surface of the second annular plate core part is matched with the first fillet shape.

[0020] Furthermore, the inner side surface of the second annular plate core part can be adjusted according to actual needs. Under this condition, the radian of the fillet in the designed fillet flywheel can be obtained without replacing the fillet flywheel wooden mold.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] The annular plate shape not only helps to form the fillet shape, but also can avoid the sand mold offset during the cooperation of the upper sand mold and the lower sand mold, greatly improving the work quality and work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] in:

[0025] Figure 1 It is a schematic diagram of the matching structure of the annular plate wood mold and the rounded flywheel wood mold;

[0026] Figure 2 This is a schematic diagram of the structure after the lower sand mold is turned over;

[0027] Figure 3 This is a schematic diagram of the structure of the lower sand mold after demolding;

[0028] Figure 4 Schematic diagram of the upper sand mold structure;

[0029] Figure 5 This is a schematic diagram of the structure after the lower sand mold is turned over;

[0030] Figure 6 It is a schematic diagram of the structure after the upper sand mold and the lower sand mold are molded together;

[0031] Figure 7 It is a schematic diagram of the ring-shaped board wood type structure;

[0032] Figure 8 Schematic diagram of the ring plate sand core structure;

[0033] Figure 9 It is a schematic diagram of the combined structure of the annular plate wood mold and the rounded flywheel wood mold;

[0034] Figure 10 Schematic diagram of the structure after the upper sand mold and the lower sand mold are combined after the arc surface shape of the sand core of the second annular plate is changed.

[0035] In the figure: 1 is the first rounded corner; 2 is the second rounded corner;

[0036] a-1 is a rounded flywheel wood type; a-2 is a ring-shaped plate wood type;

[0037] b-1 is a cavity with a ring plate wood type and a rounded flywheel wood type shape; b-2 is a rounded flywheel shaped cavity;

[0038] c-1 is the lower sand mold; c-2 is the annular plate sand core; c-2-1 is the first annular plate sand core; c-2-2 is the second annular plate sand core; c-3 is the upper sand mold;

[0039] d-1 is the raised part of the upper sand mold; d-2 is the groove; d-3 is the lifting hole. Specific implementation manners

[0040] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0041] It should be noted that all directional indications (such as up, down, left, right, front, back,...) in the embodiments of the present application are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0042] In addition, the descriptions involving "first", "second", etc. in the present application are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments may be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0043] Embodiment 1

[0044] As Figures 1 - 9 shown, for the casting method of the filleted flywheel, the structure of the filleted flywheel wooden pattern is the same as the structure of the filleted flywheel casting to be cast. The filleted flywheel wooden pattern is frustum-shaped. There is a first fillet 1 between the large end face and the side face of the filleted flywheel wooden pattern, and a second fillet 2 between the small end face and the side face of the filleted flywheel wooden pattern. The technological steps are as follows:

[0045] a. Place the annular plate wooden pattern a-2 and the filleted flywheel wooden pattern a-1. In this step, the inner side face of the annular plate wooden pattern a-2 cooperates with the first fillet 1, the inner side face of the annular plate wooden pattern a-2 contacts the first fillet 1, and the annular plate wooden pattern a-2 is located at the bottom surface of the sand box;

[0046] b. Fill in molding sand. Pour sand into the sand box with the annular plate wooden pattern a-2 and the filleted flywheel wooden pattern a-1 at the bottom to form the lower sand mold c-1;

[0047] c. Invert the lower sand mold c-1, remove the annular plate wooden mold a-2 and the fillet flywheel wooden mold a-1, forming a cavity b-1 with the shapes of the annular plate wooden mold and the fillet flywheel wooden mold. The cavity formed by removing the annular plate wooden mold a-2 is the first cavity part, and the cavity formed by removing the fillet flywheel wooden mold a-1 is the second cavity part; a groove d-2 is provided at the top of the upper sand mold c-3, and the groove d-2 is an annular groove;

[0048] d. Invert the upper sand mold, and fix the annular plate sand core c-2 at the groove d-2 by means of core hanging. The annular plate sand core c-2 is an integral annular plate sand core c-2 formed by a first annular plate sand core part c-2-1 and a second annular plate sand core part c-2-2; the first annular plate sand core part c-2-1 is matched with the structure of the groove d-2 in the upper sand mold; the inner side surface of the second annular plate sand core part c-2-2 is an arc surface; the arc surface is used to form the fillet between the large end face and the side face of the fillet flywheel casting;

[0049] e. Close the mold. Place the upper sand mold c-3 on the lower sand mold c-1, so that the annular plate sand core c-2 at the bottom of the upper sand mold c-3 is matched with the cavity b-1 with the shapes of the annular plate wooden mold and the fillet flywheel wooden mold in the lower sand mold c-1;

[0050] f. Complete the molding. Then through the conventional pouring process, finally produce the fillet flywheel with the required shape.

[0051] Preferably, the inner diameter dimension of the annular groove d-2 on the side close to the top of the upper sand mold c-3 is larger than the inner diameter dimension of the annular groove d-2 on the side far from the top of the upper sand mold c-3. This structure is beneficial to the matching of the annular plate and the groove of the upper sand mold.

[0052] Preferably, the upper end of the upper sand mold c-3 is provided with an upper sand mold protrusion d-1.

[0053] Preferably, after the annular plate sand core is hoisted to the groove in step d, change the shape of the arc surface of the second annular plate sand core part, and the inner side surface of the second annular plate sand core part can adjust the radian according to actual needs; the arc surface is used to form the fillet between the large end face and the side face of the designed fillet flywheel casting.

[0054] Preferably, before filling the molding sand, an anti-adhesive material needs to be sprinkled in the sand box. Prevent the molding sand from sticking to the wooden mold.

[0055] Preferably, before inverting the upper sand mold c-3 and the lower sand mold c-1, parting sand needs to be sprinkled on the surfaces of the upper sand mold c-3 and the lower sand mold c-1 to prevent the upper sand mold and the lower sand mold from being unable to separate during the mold splitting process.

[0056] Preferably, a lifting hole d-3 penetrating the upper sand mold is provided in the annular groove, and the annular plate core c-2 is hoisted at the groove by bolts. The bolts are located in the lifting hole d-3 of the upper sand mold and fixed to the top of the upper sand mold by nuts.

[0057] Preferably, the inner side surface of the second annular plate core part c-2-2 is matched with the shape of the first rounded corner 1.

[0058] Embodiment 2

[0059] As Figures 1 - 10 shown, for the casting method of the rounded corner flywheel, the structure of the rounded corner flywheel wooden pattern is the same as that of the required cast rounded corner flywheel. The rounded corner flywheel wooden pattern is frustum-shaped. There is a first rounded corner 1 between the large end face and the side face of the rounded corner flywheel wooden pattern, and a second rounded corner 2 between the small end face and the side face of the rounded corner flywheel wooden pattern. The technological steps are as follows:

[0060] a. Place the annular plate wooden pattern a-2 and the rounded corner flywheel wooden pattern a-1. In this step, the inner side surface of the annular plate wooden pattern a-2 is matched with the first rounded corner 1, the inner side surface of the annular plate wooden pattern a-2 contacts the first rounded corner 1, and the annular plate wooden pattern a-2 is located at the bottom surface of the sand box;

[0061] b. Fill with molding sand. Pour sand into the sand box with the annular plate wooden pattern a-2 and the rounded corner flywheel wooden pattern a-1 at the bottom to form the lower sand mold c-1;

[0062] c. Flip the lower sand mold c-1, take out the annular plate wooden pattern a-2 and the rounded corner flywheel wooden pattern a-1, and form a cavity b-1 with the shapes of the annular plate wooden pattern and the rounded corner flywheel wooden pattern;

[0063] d. Make the upper sand mold c-3. The top of the upper sand mold c-3 is provided with a groove d-2, and the groove d-2 is an annular groove; the annular plate core c-2 is fixed at the groove d-2 by the method of hanging the core. The annular plate core c-2 is an integral annular plate core c-2 formed by a first annular plate core part c-2-1 and a second annular plate core part c-2-2; the first annular plate core part c-2-1 is matched with the structure of the groove d-2 in the upper sand mold; the inner side surface of the second annular plate core part c-2-2 is an arc surface; the arc surface is used to form the rounded corner between the large end face and the side face of the cast rounded corner flywheel;

[0064] e. Close the mold. Place the upper sand mold c-3 on the lower sand mold c-1 so that the annular plate core c-2 at the bottom of the upper sand mold c-3 is matched with the cavity b-1 with the shapes of the annular plate wooden pattern and the rounded corner flywheel wooden pattern in the lower sand mold c-1;

[0065] f. Complete the molding. Then, through the conventional pouring process, finally make the rounded corner flywheel with the required shape.

[0066] Preferably, the inner diameter dimension of the annular groove d-2 on the side close to the top of the upper sand mold c-3 in step d is larger than the inner diameter dimension of the annular groove d-2 on the side far from the top of the upper sand mold c-3. This structure is beneficial to the matching of the annular plate and the groove of the upper sand mold.

[0067] Preferably, an upper sand mold convex part d-1 is provided at the top end of the upper sand mold c-3.

[0068] Preferably, after the annular plate core is hoisted to the groove in step d, the arc surface shape of the second annular plate core part is changed, and the inner side surface of the second annular plate core part can be adjusted according to actual needs; the arc surface is used to form the fillet between the large end face and the side face of the designed fillet flywheel casting.

[0069] Preferably, before filling the molding sand, an anti-adhesion material needs to be sprinkled in the sand box to prevent the molding sand from sticking to the wooden mold.

[0070] Preferably, before turning over the upper sand mold c-3 and the lower sand mold c-1, parting sand needs to be sprinkled on the surfaces of the upper sand mold c-3 and the lower sand mold c-1 to prevent the upper sand mold and the lower sand mold from being unable to separate during the mold splitting process.

[0071] Preferably, a hoisting hole d-3 penetrating the upper sand mold is provided in the annular groove, the annular plate core c-2 is hoisted at the groove by bolts, the bolts are located in the hoisting hole d-3 of the upper sand mold, and are fixed to the top of the upper sand mold by nuts.

[0072] Furthermore, the inner side surface of the second annular plate core part c-2-2 can be adjusted according to actual needs. Annular plate cores with different arcs can be made, or the arc can be changed by manually repairing the inner side surface after the core is hoisted. Under this condition, the arc of the fillet required for the designed fillet flywheel casting can be obtained without replacing the fillet flywheel wooden mold.

[0073] The above-disclosed are only the preferred embodiments of the present application. Of course, the scope of rights of the present application cannot be limited thereby. Therefore, equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. Rounding flywheel shaping process, the wooden pattern of the rounding flywheel is frustum-shaped, there is a first fillet between the large end face and the side face of the wooden pattern of the rounding flywheel, and there is a second fillet between the small end face and the side face of the wooden pattern of the rounding flywheel, characterized in that: Specifically, it includes the following steps: a. Place the annular plate wooden mold and the rounded flywheel wooden mold. In this step, the inner side surface of the annular plate wooden mold is fitted with and contacts the first rounded corner, and the annular plate wooden mold is located at the bottom surface of the sand box; b. Fill with molding sand. Pour sand into the sand box with the annular plate wooden mold and the rounded flywheel wooden mold at the bottom to form the lower sand mold; c. Turn over the lower sand mold and remove the annular plate wooden mold and the rounded flywheel wooden mold to form a cavity with the shapes of the annular plate wooden mold and the rounded flywheel wooden mold. The cavity formed by removing the annular plate wooden mold is the first cavity part, and the cavity formed by removing the rounded flywheel wooden mold is the second cavity part; d. Make the upper sand mold. A groove is provided at the top of the upper sand mold, and the groove is an annular groove; Fix the annular plate sand core at the groove by means of core hanging. The annular plate sand core is an integral annular plate sand core formed by a first annular plate sand core part and a second annular plate sand core part; the first annular plate sand core part matches the groove structure in the upper sand mold; the inner side surface of the second annular plate sand core part is an arc surface; the arc surface is used to form the fillet between the large end face and the side face of the rounded flywheel casting; e. Close the mold. Place the upper sand mold on the lower sand mold so that the annular plate sand core at the bottom of the upper sand mold is fitted with the cavity with the shapes of the annular plate wooden mold and the rounded flywheel wooden mold in the lower sand mold.

2. The rounded flywheel shaping process according to claim 1, characterized in that: In step d, the inner diameter dimension of the annular groove on the side close to the top of the upper sand mold is larger than the inner diameter dimension of the annular groove on the side far from the top of the upper sand mold.

3. The rounded flywheel shaping process according to claim 1, characterized in that: The outer side surface of the second annular plate sand core part is fitted with the outer side surface of the first cavity part; the bottom surface of the second annular plate sand core part is fitted with the bottom surface of the first cavity part, and the second annular plate sand core part just fits into the first cavity part.

4. The rounded flywheel shaping process according to claim 1, characterized in that: A hoisting hole penetrating the upper sand mold is provided in the annular groove. In step d, the annular plate sand core is hoisted at the groove by bolts. The bolts are located in the hoisting holes of the upper sand mold and are fixed to the top of the upper sand mold by nuts.

5. The rounded flywheel modeling process according to claim 4, wherein: After the annular plate sand core in step d is hoisted to the groove, change the shape of the arc surface of the second annular plate sand core part; the arc surface is used to form the fillet between the large end face and the side face of the designed rounded flywheel casting.

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