Crimping tool for sparking plug rubber block and rubber block manufacturing method

Abstract

The invention belongs to the field of sparking plugs of aviation and airspace engines, and particularly relates to a crimping tool for sparking plug rubber blocks and a rubber block manufacturing method. The crimping tool comprises a male die, a female die, a core rod and a base; the male die comprises a cylindrical rod and a handle located at one end of the cylindrical rod, the cylindrical rod is provided with a guide hole, the female die is provided with an inner hole allowing the cylindrical rod to be inserted, and the core rod is provided with a cylindrical section with the same diameter as the inner hole and a thin rod located in the center of the cylindrical section and used for being inserted into the guide hole. The female die is arranged on the base, the core rod is arranged in the inner hole, the bottom end of the core rod makes contact with the base, the male die is inserted into the inner hole, and a thin rod of the core rod is inserted into the male die guide hole. And the male die, the female die and the core rod form an annular space for pressing the rubber block, so that the pressing process of the sparking plug pressing rubber block is standardized and streamlined.

Description

Technical Field

[0001] The present application belongs to the field of nozzles for aviation and aerospace engines, and in particular relates to a crimping tool for a nozzle rubber block and a method for manufacturing the rubber block. Background Art

[0002] During the processing of the nozzle, a heat-sealed structure is used and DM-308 sealant is filled to seal the semiconductor, insulator and metal shell to ensure that the nozzle does not leak under a certain air pressure.

[0003] The existing method of assembling DM-308 sealant for nozzles is as follows: 1) 308 glue powder and water are mixed in a certain proportion, stirred evenly, and the glue powder is prepared. 2) The glue powder is placed on a piece of white paper, the specified glue powder is weighed on an electronic balance, and the glue powder is poured into the sealing part of the inner hole of the shell. Since the glue powder is relatively loose, it is necessary to pour the glue powder while using a special tool to compact the glue powder. The glue powder assembled using this method, due to the assembly method, causes part of the glue powder to be scattered on the rest of the shell and is not installed in a fixed position, and the weight requirement required by the process data cannot be met. In addition, the glue powder is relatively long, which causes the glue powder to be not compacted within the specified time during heat sealing. When the subsequent product is tested for air tightness, air leakage is likely to occur. In addition, the processing cycle is time-consuming, the scrap rate is high, and the difficulty is high, which directly affects the company's product delivery cycle.

[0004] In order to solve this problem, the present tooling glue pressing mold is designed, and the rubber powder is processed into a molded rubber block through the glue pressing mold. In the subsequent assembly process, the rubber block is directly assembled at the sealing position. The rubber block of the same weight is significantly shorter than the rubber powder. When performing heat sealing, the operability is strong and it can be pressed into place at one time, avoiding air leakage during the subsequent air tightness test. Summary of the invention

[0005] In order to solve the above problems, the present application provides a crimping tool for a nozzle rubber block, comprising:

[0006] Male mold, female mold, core rod and base;

[0007] The male mold includes a cylindrical rod and a handle at one end of the cylindrical rod, the cylindrical rod has a guide hole, the female mold has an inner hole for inserting the cylindrical rod, the core rod has a cylindrical section with the same diameter as the inner hole and a thin rod located at the center of the cylindrical section for inserting into the guide hole; the female mold is placed on the base, the core rod is placed in the inner hole, the bottom end of the core rod contacts the base, the male mold is inserted into the inner hole, and the thin rod of the core rod is inserted into the male mold guide hole; the male mold, the female mold and the core rod form an annular space for pressing the rubber block.

[0008] Preferably, the base has a guide groove and a discharge hole, the female mold slides in a straight line in the plane at the bottom of the guide groove, the discharge hole is located at one end of the bottom of the guide groove, and when the female mold moves until the inner hole and the discharge hole are coaxial, the core rod and the pressed rubber block are discharged from the discharge hole.

[0009] Preferably, the base is made of 45 steel, and the male mold, female mold and core rod are all made of CrWMn.

[0010] Preferably, the inlet on the inner hole is a funnel mouth.

[0011] A method for manufacturing a nozzle rubber block is manufactured by using the crimping tooling of the nozzle rubber block, and the process includes:

[0012] Slide the female mold along the guide groove to the side without the discharge hole, and place the core rod in the inner hole with the thin rod facing upwards;

[0013] Pour the prepared rubber powder into the inner hole, insert the male mold into the inner hole, and insert the thin rod into the guide hole;

[0014] Apply pressure to the male mold through a press to compact the rubber powder into a rubber block;

[0015] Slide the female mold along the guide groove to the side with the discharge hole, and press the male mold to discharge the core rod and the rubber block from the discharge hole.

[0016] Preferably, the rubber powder is prepared by mixing 308 rubber powder and water in a certain ratio.

[0017] Preferably, the press machine applies a pressure of 2 MPa to the male mold and maintains the pressure for 5 seconds.

[0018] Preferably, the rubber block is taken out and baked in an oven at 90° C.-110° C. for 1 hour before being taken out.

[0019] A method for installing a nozzle, using the rubber block made by the method for making a nozzle rubber block to install the semiconductor and the center rod assembly to the head of the shell;

[0020] Put the rubber block and the insulator with the same weight on the center rod in turn, and press down the insulator so that the rubber block is compacted between the semiconductor and the insulator;

[0021] Put the assembled nozzle into the heating chamber and heat it until the rubber block is in a molten state, and at the same time press the insulator tightly so that the molten rubber block fills the entire glue packaging space;

[0022] Cool and set.

[0023] The advantages of the present application include: the present application standardizes the pressing process of the nozzle pressed rubber block and streamlines the process, solves the shortcomings formed in the manual loading of rubber powder, such as long processing time, poor operability, and failure of performance tests, etc., redesigns the pressing tooling based on the product structure, and improves the product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a cross-sectional view of a crimping tooling of a nozzle rubber block in a preferred embodiment of the present application;

[0025] Figure 2 It is a schematic diagram of the cooperation between the female mold and the base in a preferred embodiment of the present application.

[0026] Figure 3 This is a schematic diagram of a nozzle according to a preferred embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to make the technical solution and advantages of the present application clearer, the technical solution of the present application will be further described in detail in detail and in detail in conjunction with the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present application, which are only used to explain the present application, not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design. In the absence of conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0028] In addition, it should be noted that, unless otherwise clearly specified and limited, the words "installed", "connected", "connected" and similar terms used in the description of this application should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. Technical personnel in the field can understand their specific meanings in this application according to the specific circumstances.

[0029] like Figure 1-Figure 2 As shown, the present application provides a crimping tool for a nozzle rubber block, comprising:

[0030] Male mold, female mold, core rod and base;

[0031] The male mold includes a cylindrical rod and a handle at one end of the cylindrical rod, the cylindrical rod has a guide hole, the female mold has an inner hole for inserting the cylindrical rod, the core rod has a cylindrical section with the same diameter as the inner hole and a thin rod located at the center of the cylindrical section for inserting into the guide hole; the female mold is placed on the base, the core rod is placed in the inner hole, the bottom end of the core rod contacts the base, the male mold is inserted into the inner hole, and the thin rod of the core rod is inserted into the male mold guide hole; the male mold, the female mold and the core rod form an annular space for pressing the rubber block.

[0032] In some optional embodiments, the base has a guide groove and a discharge hole, the female mold slides in a straight line in the plane at the bottom of the guide groove, the discharge hole is located at one end of the bottom of the guide groove, and when the female mold moves until the inner hole and the discharge hole are coaxial, the core rod and the pressed rubber block are discharged from the discharge hole.

[0033] In some optional embodiments, the base is made of 45 steel, and the male mold, female mold and core rod are all made of CrWMn.

[0034] In some optional embodiments, the inlet on the inner hole is a funnel mouth.

[0035] A method for manufacturing a nozzle rubber block is manufactured by using the crimping tooling of the nozzle rubber block, and the process includes:

[0036] Slide the female mold along the guide groove to the side without the discharge hole, and place the core rod in the inner hole with the thin rod facing upwards;

[0037] Use a spoon to put the prepared rubber powder along the funnel mouth of the female mold, insert the male mold into the inner hole, and insert the thin rod into the guide hole;

[0038] Apply pressure to the male mold through a press, adjust the press parameters to 2MPa, compact with the pressure head, and maintain pressure for 5 seconds to compact the rubber powder into a rubber block;

[0039] Slide the female mold along the guide groove to the side with the discharge hole, and press the male mold to discharge the core rod and the rubber block from the discharge hole.

[0040] Put the rubber block into a clean porcelain plate, put it into an oven at 100±10℃, bake for 1 hour and take it out.

[0041] In some optional implementations, the rubber powder is mixed with water in a certain ratio through 308 rubber powder.

[0042] In some optional embodiments, the press applies a pressure of 2 MPa to the male mold and maintains the pressure for 5 seconds.

[0043] In some optional embodiments, the glue block is taken out and baked in an oven at 90° C.-110° C. for 1 hour before being taken out.

[0044] A method for installing a nozzle, such as Figure 3 As shown, the semiconductor and center rod assembly are mounted on the housing head using the rubber block made by the nozzle rubber block making method;

[0045] Put the rubber block and the insulator on the central rod in sequence, and press down the insulator so that the rubber block is compacted between the semiconductor and the insulator;

[0046] Put the assembled nozzle into the heating chamber and heat it until the rubber block is in a molten state, and at the same time press the insulator tightly so that the molten rubber block fills the entire glue packaging space;

[0047] Cool and set.

[0048] The advantages of the present application include: the present application makes the pressing process of the nozzle pressing rubber block a standardized and streamlined operation. It solves the shortcomings formed in the process of manually loading the rubber powder, such as long processing time, poor operability, and unqualified performance tests, and redesigns the pressing tooling based on the product structure to improve the product qualification rate.

[0049] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A crimping tool for a nozzle rubber block, characterized in that: include: A male mold (1), a female mold (2), a core rod (3) and a base (4); The male mold (1) comprises a cylindrical rod and a handle located at one end of the cylindrical rod, the cylindrical rod having a guide hole (11), the female mold (2) having an inner hole (21) for inserting the cylindrical rod, and the core rod (3) having a cylindrical section having the same diameter as the inner hole (21) and a thin rod (31) located at the center of the cylindrical section and used for inserting into the guide hole (11); the female mold (2) is placed on a base (4), the core rod (3) is placed in the inner hole (21), the bottom end of the core rod (3) contacts the base (4), the male mold (1) is inserted into the inner hole (21), and the thin rod (31) of the core rod (3) is inserted into the guide hole (11) of the male mold (1); the male mold (1), the female mold (2) and the core rod (3) form an annular space for pressing a rubber block (7).

2. The crimping tool for the nozzle rubber block according to claim 1, characterized in that: The base (4) has a guide groove (41) and a discharge hole (42). The female mold (2) slides along a straight line in a plane at the bottom end of the guide groove (41). The discharge hole (42) is located at one end of the bottom end of the guide groove (41). When the female mold (2) moves until the inner hole (21) and the discharge hole (42) are coaxial, the core rod (3) and the pressed rubber block (7) are discharged from the discharge hole (42).

3. The crimping tool for the nozzle rubber block according to claim 2, characterized in that: The base (4) is made of 45 steel, and the male mold (1), female mold (2) and core rod (3) are all made of CrWMn.

4. The crimping tool for the nozzle rubber block according to claim 2, characterized in that: The upper inlet of the inner hole (21) is a funnel mouth.

5. A method for making a nozzle rubber block, characterized in that: The method is made by using the crimping tooling of the nozzle rubber block as claimed in any one of claims 2 to 4, and the process includes: Slide the female mold (2) along the guide groove (41) to the side without the discharge hole (42), and place the core rod (3) in the inner hole (21) with the thin rod (31) facing upwards; Pour the prepared rubber powder into the inner hole (21), insert the male mold (1) into the inner hole (21), and insert the thin rod (31) into the guide hole (11); Applying pressure to the male mold (1) by means of a press machine to compact the rubber powder into a rubber block (7); The female mold (2) is slid along the guide groove (41) to the side with the discharge hole (42), and the male mold (1) is pressed to discharge the core rod (3) and the rubber block (7) from the discharge hole (42).

6. The method for manufacturing the nozzle rubber block (7) according to claim 3, characterized in that: The rubber powder is prepared by mixing 308 rubber powder and water in a certain proportion.

7. The method for manufacturing the nozzle rubber block (7) according to claim 3, characterized in that: The press machine applies a pressure of 2 MPa to the male mold (1) and maintains the pressure for 5 seconds.

8. The method for manufacturing the nozzle rubber block (7) according to claim 3, characterized in that: The rubber block (7) is taken out and baked in an oven at 90°C-110°C for 1 hour.

9. A method for installing a nozzle, characterized in that: The rubber block (7) manufactured by the method for manufacturing the nozzle rubber block (7) according to any one of claims 5 to 8 is characterized in that: Install the semiconductor (8) and center rod (9) assembly to the head of the housing (5); Putting a rubber block (7) and an insulator (6) of the same weight on the central rod (9) in sequence, and pressing down the insulator (6) so that the rubber block (7) is compacted between the semiconductor (8) and the insulator (6); The assembled nozzle is placed in a heating chamber and heated until the rubber block (7) is in a molten state, and at the same time, the insulator (6) is pressed tightly so that the molten rubber block (7) fills the entire glue-binding space; Cool and set.

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