Machining die for valve shell of EGR (Exhaust Gas Recirculation) valve

Abstract

The utility model provides an EGR valve casing processing mould, which comprises a first mould body and a second mould body, the surface of the second mould body is provided with a plurality of mould cores corresponding to cavities, the first mould body is arranged in the middle of a first mould plate, four corners of the second mould body are respectively and vertically provided with a guide support shaft, and the guide support shafts are respectively and movably arranged in the second mould plate. The guide supporting shafts between the second die plate and the second die body are sleeved with reset springs respectively. When the die-casting machine is used and the first die body and the second die body are closed, the die-casting machine continues to push the second die plate to move towards the first die plate, so that the reset spring can push the second die body to be in contact with the first die body with larger force, and the second die body is in elastic contact with the first die body; therefore, rigid contact caused by too large mold closing force between the second mold body and the first mold body is avoided, the number of the mold cores and the mold cavities is multiple, and a plurality of valve shells can be produced at a time when the valve shells are produced.

Description

Technical Field

[0001] This utility model relates to the field of EGR valve shell mold technology, specifically to a processing mold for an EGR valve shell. Background Technology

[0002] The EGR valve, or Exhaust Gas Recirculation valve, is a key component installed on the engine. Its primary function is to control the amount of exhaust gas recirculated, thereby optimizing engine performance and reducing emissions. By reintroducing combustion gases into the intake system, the EGR valve lowers combustion chamber temperature, reduces nitrogen oxide emissions, and optimizes fuel efficiency.

[0003] The EGR valve body is made of aluminum alloy and is produced through die casting. In the manufacturing process of EGR valves, the valve body can be directly die-cast. Existing die-casting molds consist of a cavity mold and a punch mold. During mold closing, the cavity mold and punch mold are joined together. Since die-casting machines are hydraulically driven, excessive rigid contact force between the cavity mold and punch mold during mold closing may damage the mold. Therefore, we propose a new machining mold for the EGR valve body. Utility Model Content

[0004] This invention provides a machining mold for an EGR valve housing, which has the advantages of high production efficiency and avoids rigid contact between molds, thus solving the problems mentioned in the background art.

[0005] The technical solution of this utility model is implemented as follows: A processing mold for an EGR valve shell is designed, including a first mold body and a second mold body. The surface of the first mold body is provided with multiple cavities, and the surface of the second mold body is provided with multiple mold cores corresponding to the cavities. The first mold body is installed in the middle of the first template, and guide support shafts are vertically installed at the four corners of the second mold body. The guide support shafts are movably arranged in the second template, and return springs are respectively sleeved on the guide support shafts between the second template and the second mold body.

[0006] Optionally, each guide support shaft is movably placed inside a guide sleeve, which is fixed to the second template.

[0007] Optionally, a limiting plate is coaxially provided at one end of the guide support shaft near the second mold body, and the two ends of the return spring are in elastic contact with the limiting plate and the guide sleeve, respectively.

[0008] Optionally, a limiting seat may be detachably provided at the end of the guide support shaft away from the second mold body. When the reset spring extends, the limiting seat contacts the end of the guide sleeve.

[0009] Optionally, a pressure sensor is coaxially provided on one end of one of the guide sleeves near the second mold body, and the pressure sensor is in elastic contact with the reset spring.

[0010] Optionally, multiple cavities are interconnected through channels, a die-casting port communicating with the cavity is provided on one side of the first mold body, and an exhaust hole communicating with the cavity is also provided on the side of the first mold body.

[0011] Optionally, mounting seats are provided at the four corners of both the second mold body and the first mold body. The mounting seats at the four corners of the second mold body are detachably connected to the ends of the guide support shafts, and the mounting seats at the four corners of the first mold body are detachably connected to the first template.

[0012] Optionally, a heating cavity is provided on the side of the first mold body near the first template and on the side of the second mold body near the second template, and a heating element is provided in each heating cavity. A sealing plate is detachably provided on the edge of the heating cavity on the second mold body.

[0013] Compared with the prior art, when the first mold body and the second mold body are closed, the die-casting machine continues to push the second mold plate towards the first mold plate. This allows the return spring to push the second mold body to contact the first mold body with greater force, thereby making elastic contact between the second mold body and the first mold body. This avoids rigid contact caused by excessive closing force between the second mold body and the first mold body. Moreover, there are multiple mold cores and cavities, which can be produced at one time when producing valve bodies, resulting in high work efficiency. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a structural schematic diagram of one side of the present invention.

[0016] Figure 2 This is a schematic diagram of the structure on the other side of this utility model.

[0017] Figure 3 This is a side view of the present invention.

[0018] In the diagram: 1. First template; 2. First mold body; 3. Vent hole; 4. Cavity; 5. Channel; 6. Limiting seat; 7. Die casting port; 8. Second mold body; 9. Guide sleeve; 10. Second template; 11. Return spring; 12. Limiting plate; 13. Pressure sensor; 14. Guide support shaft; 15. Mounting seat; 16. Mold core; 17. Heating chamber; 18. Sealing plate. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] Reference Figures 1 to 3 This utility model provides a technical solution: a processing mold for an EGR valve shell, including a first mold body 2 and a second mold body 8. The surface of the first mold body 2 is provided with multiple cavities 4, and the surface of the second mold body 8 is provided with multiple mold cores 16 corresponding to the cavities 4. The shape between the mold cores 16 and the cavities 4 matches the shape of the EGR valve shell to be produced. Figure 1 As shown, multiple cavities 4 are interconnected through channels 5. A die-casting port 7 communicating with the cavity 4 is provided on one side of the first mold body 2. An exhaust port 3 communicating with the cavity 4 is also provided on the side of the first mold body 2. When the first mold body 2 and the second mold body 8 are closed, the first mold body 2 and the second mold body 8 can be sealed. The die-casting device can then die-cast molten metal into the mold through the die-casting port 7. Excess air in the mold will be discharged from the exhaust port 3, and the molten metal can be formed between the mold core 16 and the cavity 4.

[0021] like Figure 1 As shown, the first mold body 2 is installed in the middle of the first template 1. In actual use, the edge of the first template 1 is provided with multiple mounting holes for connecting to the die-casting machine.

[0022] Furthermore, such as Figure 1 and Figure 2 As shown, guide support shafts 14 are vertically installed at the four corners of the second mold body 8. Specifically, mounting seats 15 are installed at the four corners of the second mold body 8. The mounting seats 15 are detachably connected to the first template 1, that is, the mounting seats 15 are fastened to the first template 1 by bolts.

[0023] At the same time, such as Figure 3 As shown, a heating cavity 17 is provided on the side of the first mold 2 near the first template 1. The heating cavity 17 is equipped with a heating element, which is a heating rod. The heat emitted by the heating element can preheat the first mold 2. When the first mold 2 is installed on the first template 1, the heating element can be sealed.

[0024] Furthermore, the guide support shafts 14 are movably disposed within the second template 10, such as... Figure 1 As shown, each guide support shaft 14 is movably placed inside the guide sleeve 9, the guide sleeve 9 is fixed on the second template 10, and a return spring 11 is respectively sleeved on the guide support shaft 14 between the second template 10 and the second mold body 8;

[0025] A limiting plate 12 is coaxially provided at one end of the guide support shaft 14 near the second mold body 8. The two ends of the return spring 11 are in elastic contact with the limiting plate 12 and the guide sleeve 9, respectively. A limiting seat 6 is detachably provided at one end of the guide support shaft 14 away from the second mold body 8. When the return spring 11 extends, the limiting seat 6 contacts the end of the guide sleeve 9. The limiting seat 6 is specifically shaped like a hexagonal nut structure. The limiting seat 6 is threadedly connected to the end of the guide support shaft 14, which makes it convenient to disassemble and assemble the limiting seat 6.

[0026] like Figure 2 As shown, the second mold body 8 is installed together with the guide support shaft 14 in such a way that mounting seats 15 are also provided at the four corners of the second mold body 8. The mounting seats 15 are detachably connected to the ends of the guide support shaft 14, that is, the ends of the guide support shaft 14 are stepped shafts. The mounting seats 15 here are fitted on the stepped shafts, and then nuts are threaded on the stepped shafts. The nuts tightly fix the mounting seats 15 to the ends of the guide support shaft 14.

[0027] Moreover, in actual use, the second template 10 is the same as the first template 1. The edge of the second template 10 is provided with multiple mounting holes for connecting to the die-casting machine.

[0028] Furthermore, the second mold body 8, like the first mold body 2, requires heating. Therefore, a heating cavity 17 is provided on the side of the second mold body 8 near the second template 10. A heating element is also provided in the heating cavity 17. However, the heating cavity 17 is sealed by a sealing plate 18. That is, the edge of the heating cavity 17 is detachably provided with a sealing plate 18. Specifically, the edge of the sealing plate 18 is fastened to the edge of the heating cavity 17 by bolts.

[0029] Based on the above embodiments, the specific process is as follows: First, the first template 1 and the second template 10 are installed on the die-casting machine. At this time, the first template 1 and the first mold body 2 are static molds, and the second mold body 8 and the second template 10 are dynamic molds.

[0030] Driven by the die-casting machine, the first mold 2 and the second mold 8 are closed. After the second mold 8 contacts the first mold 2, the die-casting machine continues to push the second template 10 toward the first template 1. This allows the return spring 11 to push the second mold 8 to contact the first mold 2 with greater force, thus allowing the second mold 8 and the first mold 2 to make elastic contact.

[0031] However, to avoid excessive contact force between the second mold body 8 and the first mold body 2, a pressure sensor 13 is coaxially installed on one end of the guide sleeve 9 near the second mold body 8. The pressure sensor 13 is in elastic contact with the return spring 11. The pressure sensor 13 is connected to the control system of the die-casting machine. During the mold closing process, the pressure of the return spring is constantly monitored. When the pressure of the return spring reaches the preset value, the process can be stopped. This ensures that the second mold body 8 and the first mold body 2 can be effectively closed, and also avoids excessive mold closing force between the second mold body 8 and the first mold body 2, which would cause rigid contact.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A machining mold for an EGR valve housing, comprising a first mold body (2) and a second mold body (8), wherein the surface of the first mold body (2) is provided with a plurality of cavities (4), and the surface of the second mold body (8) is provided with a plurality of mold cores (16) corresponding to the cavities (4), characterized in that, The first mold (2) is installed in the middle of the first template (1); The four corners of the second mold (8) are respectively vertically installed with guide support shafts (14), and the guide support shafts (14) are respectively movably set in the second template (10). The guide support shafts (14) between the second template (10) and the second mold (8) are respectively fitted with reset springs (11).

2. The machining mold for the EGR valve body as described in claim 1, characterized in that, Each guide support shaft (14) is movably placed inside the guide sleeve (9), which is fixed on the second template (10).

3. The machining mold for the EGR valve body as described in claim 2, characterized in that, The guide support shaft (14) is coaxially provided with a limiting plate (12) at one end near the second mold body (8), and the two ends of the reset spring (11) are in elastic contact with the limiting plate (12) and the guide sleeve (9) respectively.

4. The machining mold for the EGR valve body as described in claim 3, characterized in that, The guide support shaft (14) is detachably provided with a limiting seat (6) at one end away from the second mold body (8). When the reset spring (11) extends, the limiting seat (6) contacts the end of the guide sleeve (9).

5. The machining mold for the EGR valve body as described in claim 4, characterized in that, A pressure sensor (13) is coaxially provided on one end of one of the guide sleeves (9) near the second mold body (8), and the pressure sensor (13) is in elastic contact with the reset spring (11).

6. The machining mold for the EGR valve body as described in claim 1, characterized in that, Multiple cavities (4) are interconnected through channels (5). A die-casting port (7) communicating with the cavity (4) is provided on one side of the first mold body (2). An exhaust hole (3) communicating with the cavity (4) is also provided on the side of the first mold body (2).

7. The machining mold for the EGR valve body as described in claim 5, characterized in that, The second mold (8) and the first mold (2) are provided with mounting seats (15) at their four corners. The mounting seats (15) at the four corners of the second mold (8) are detachably connected to the end of the guide support shaft (14), and the mounting seats (15) at the four corners of the first mold (2) are detachably connected to the first template (1).

8. The machining mold for the EGR valve body as described in claim 7, characterized in that, Heating chambers (17) are provided on the side of the first mold (2) near the first template (1) and on the side of the second mold (8) near the second template (10). Each heating chamber (17) is equipped with a heating element; the heating chamber (17) on the second mold body (8) is provided with a sealing plate (18) on its edge.

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