A thin-wall cavity parts processing tool

Abstract

The present invention discloses a tool for processing thin-walled cavity parts, comprising a core body and two blocking blocks. The thin-walled cavity part is horizontally arranged along the front-to-back direction. The core body is in the shape of a straight bar and cooperates with the inner hole of the thin-walled cavity part. The core body is inserted into the thin-walled cavity part, and its two ends are respectively located in two connecting flanges. The two blocking blocks are respectively spaced at the two ends of the thin-walled cavity part along the front-to-back direction, and can detachably seal the ends of the two connecting flanges away from each other. The thin-walled cavity part and the two blocking blocks are jointly enclosed to form a chamber, one of the blocking blocks is provided with a negative pressure suction port connected to the chamber, the negative pressure suction port is used to connect with the air intake of the negative pressure equipment to draw negative pressure in the chamber, and make the thin-wall area of ​​the thin-walled cavity part deform to fit on the core body. It has a simple structure and is easy to assemble, and at the same time, the yield rate of processing thin-walled cavity parts is high.

Description

Technical Field

[0001] The invention belongs to the field of machining equipment, and in particular relates to a tool for machining thin-walled cavity parts. Background Art

[0002] In radar antenna products, many high-precision ultra-thin-wall waveguide cavities are often designed to meet requirements such as switching of transmitted microwave channels. The characteristic of this product is that the thickness of the thin wall of the cavity is only about 0.1 mm, and the area of ​​the thin wall is about 1500 square millimeters. This makes it very easy to cause the thin wall to stretch, deform, and tear during machining, thereby reducing the yield rate. Summary of the Invention

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a thin-walled cavity part processing tool that has a simple structure and can stably support the thin-wall area of ​​the thin-walled cavity part.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a thin-walled cavity part processing tool, which is used to support a thin-walled cavity part, the thin-walled cavity part having a cylindrical thin-walled area and two integrally formed connecting flanges connected at both ends of the thin-walled area, including a core body and two blocking blocks, the thin-walled cavity part is horizontally arranged along the front-to-back direction, the core body is a straight strip and cooperates with the inner hole of the thin-walled cavity part, the core body is inserted into the thin-walled cavity part, and its two ends are respectively located in the two connecting flanges, the two blocking blocks are respectively distributed at both ends of the thin-walled cavity part along the front-to-back direction, and can detachably block the ends of the two connecting flanges away from each other, the thin-walled cavity part and the two blocking blocks together enclose a chamber, one of the blocking blocks is provided with a negative pressure suction port connected to the chamber, the negative pressure suction port is used to communicate with the suction port of the negative pressure equipment to draw negative pressure into the chamber, and make the thin-walled area of ​​the thin-walled cavity part deform to fit on the core body.

[0005] The beneficial effect of the above technical solution is that: when processing the thin-walled area of ​​the thin-walled cavity part, the core body is filled in the thin-walled cavity part, and the two ends of the core body are supported in the two connecting flanges, and then the two blocking blocks respectively block the ends of the two connecting flanges away from each other. At this time, the thin-walled cavity part and the two blocking blocks are enclosed to form a sealed chamber, and then negative pressure is drawn in the chamber. Since the thickness of the thin-walled area is about 0.1mm, it will be deformed to fit on the core body under the action of the negative pressure in the chamber. At this time, the thin-walled area is tightly wrapped on the core body and supported by the core body. At this time, the core body and the thin wall can be understood as a whole, so the thin-walled area is not easily damaged or torn when processing the thin wall, and the processing yield is high.

[0006] In the above technical solution, the negative pressure suction port is arranged at one end of the corresponding block away from the other block.

[0007] The beneficial effect of the above technical solution is that the negative pressure suction port does not affect the sealing between the block and the corresponding connecting flange.

[0008] In the above technical solution, the two blocks are each provided with a groove in the middle part close to one end of each other, and the groove is provided with a sealing ring protruding from the groove. The sealing ring on each block is used to seal against the edge of the corresponding connecting flange, and the negative pressure suction port is connected to the groove on the corresponding block.

[0009] The beneficial effect of the above technical solution is that the sealing performance between the blocking block and the connecting flange is improved by providing a sealing ring.

[0010] In the above technical solution, the length of the core is smaller than the length of the thin-walled cavity part, but larger than the length of the thin-walled area.

[0011] The beneficial effect of the above technical solution is that both ends of the core can be supported in the two connecting flanges, so that the two connecting flanges support the two ends of the core, and the core supports the thin-walled area.

[0012] The core body in the above technical solution is a cemented carbide rod.

[0013] The beneficial effects of the above technical solution are: it has high hardness and is not easy to deform, so it has good supporting performance.

[0014] The negative pressure equipment described in the above technical solution is a negative pressure pump or a vacuum pump.

[0015] The beneficial effect of the above technical solution is that it has a simple structure.

[0016] The negative pressure device in the above technical solution includes a Venturi ejector, the suction port of the Venturi ejector is connected to the negative pressure suction port, and the injection port of the Venturi ejector is used to introduce airflow to make the chamber have a negative pressure.

[0017] The beneficial effect of the above technical solution is that the airflow can be combined with the Venturi ejector to generate negative pressure at the negative pressure suction port.

[0018] The injection port of the Venturi ejector in the above technical solution is also provided with a flow valve.

[0019] The beneficial effect of the above technical solution is that the flow rate of the air flow can be adjusted by the flow valve to adjust the negative pressure at the negative pressure suction port. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1This is a cross-sectional view of the thin-walled cavity component described in Example 1 of the present invention;

[0021] Figure 2 This is a side view of the thin-walled cavity component described in Example 1 of the present invention;

[0022] Figure 3 This is a simplified structural diagram of the thin-walled cavity parts processing tooling after assembly according to Example 1 of the present invention;

[0023] Figure 4 This is a diagram of the state when the two blocking blocks are separated from the two ends of the thin-walled cavity part in Example 1 of the present invention;

[0024] Figure 5 This is a schematic diagram of the connection between the negative pressure equipment and the corresponding blocking block described in Example 2 of the present invention.

[0025] In the figure: 1 thin-walled cavity part, 11 thin-walled area, 12 connecting flange, 2 core, 3 blocking block, 31 negative pressure suction port, 32 groove, 33 sealing ring, 4 negative pressure equipment, 41 Venturi ejector, 42 flow valve. DETAILED DESCRIPTION

[0026] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention. The following paragraphs describe the present invention in more detail by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are all in a very simplified form and are not in exact proportions. They are only used to facilitate and clearly illustrate the purpose of the embodiments of the present invention.

[0027] Example 1

[0028] First, the structure of the thin-walled cavity part 1 to be processed in this embodiment is as follows: Figure 1 and Figure 2 As shown, the middle part is a thin-walled area with a wall thickness of about 0.1 mm, and the two ends of the thin-walled area are connecting flanges (its structure is similar to a thin-walled tube coaxially connected between two coaxially distributed connecting flanges, which will not be repeated here).

[0029] like Figure 3 and Figure 4As shown, this embodiment provides a thin-walled cavity part processing tooling, which is used to support a thin-walled cavity part 1, including a core body 2 and two blocking blocks 3. The thin-walled cavity part 1 is horizontally arranged along the front-to-back direction, and the core body 2 is a straight strip and cooperates with the inner hole of the thin-walled cavity part 1. The core body 2 is inserted into the thin-walled cavity part 1, and its two ends are respectively located in the two connecting flanges 12. The two blocking blocks 3 are respectively distributed at the two ends of the thin-walled cavity part 1 along the front-to-back direction, and can detachably seal the ends of the two connecting flanges 12 away from each other. The thin-walled cavity part 1 and the two blocking blocks 3 together enclose a chamber, and one of the blocking blocks 3 is provided with a negative pressure suction port 31 connected to the chamber, and the negative pressure suction port 31 is used to communicate with the suction of the negative pressure device 4. The port is connected to draw negative pressure in the chamber, and the thin-walled area 11 of the thin-walled cavity part 1 is deformed to fit on the core 2. In this way, when the thin-walled area of ​​the thin-walled cavity part is processed, the core is filled in the thin-walled cavity part, and the two ends of the core are supported in the two connecting flanges, and then the two connecting flanges are respectively blocked by two blocking blocks at one end away from each other. At this time, the thin-walled cavity part and the two blocking blocks are enclosed to form a sealed chamber, and then negative pressure is drawn in the chamber. Since the thickness of the thin-walled area is about 0.1mm, it will be deformed to fit on the core under the action of the negative pressure in the chamber. At this time, the thin-walled area is tightly wrapped on the core and supported by the core. At this time, the core and the thin wall can be understood as a whole, so the thin-walled area is not easily damaged or torn when the thin wall is processed, and the processing yield is high.

[0030] Among them, the connection method between the two connecting flanges and the two blocking blocks can be achieved by using a fixture on the machine tool to clamp the corresponding blocking blocks and connecting flanges respectively (after clamping, each blocking block seals the corresponding connecting flange), and after clamping, the entire processing tooling and thin-walled cavity part 1 are fixed on the machine tool, thereby realizing machining of the thin-walled area.

[0031] In the above technical solution, the negative pressure suction port 31 is arranged at one end of the corresponding block 3 away from the other block 3, so that the negative pressure suction port does not affect the sealing between the block and the corresponding connecting flange.

[0032] In the above technical solution, the two blocks 3 are each provided with a groove 32 in the middle part close to one end of each other, and the groove 32 is provided with a sealing ring 33 protruding from the groove. The sealing ring 33 on each block 3 is used to seal against the edge of the corresponding connecting flange 12, and the negative pressure suction port 31 is connected to the groove 32 on the corresponding block 3. By setting the sealing ring, the sealing performance between the block and the connecting flange is better when they are against each other.

[0033] In the above technical solution, the length of the core 2 is smaller than the length of the thin-walled cavity part 1, but larger than the length of the thin-walled area 11, so that both ends of the core can be supported in the two connecting flanges, so that the two connecting flanges support the two ends of the core, and the core supports the thin-walled area.

[0034] The core 2 in the above technical solution is a cemented carbide rod (its specific material can be tungsten carbide alloy), which has high hardness and is not easy to deform, so its supporting performance is good.

[0035] The negative pressure device 4 in the above technical solution is a negative pressure pump or a vacuum pump, and its structure is simple.

[0036] The shape of the cross-section of the core body in this embodiment is consistent with the shape of the inner hole of the thin-walled cavity part, but the size is slightly smaller than the size of the inner hole of the thin-walled cavity part, so that the core body can be smoothly inserted into the thin-walled cavity part (preferably, the gap between the core body and the inner hole wall after being inserted into the thin-walled cavity part is about 0.01 mm). After the thin-walled area is processed, the negative pressure in the chamber is stopped, and the block is removed from the two connecting flanges. At this time, the thin-walled area will recover under the action of stress and restore the gap between it and the core body. At this time, a pestle rod can be used to push the core body out of the thin-walled cavity part.

[0037] Example 2

[0038] like Figure 5 As shown, the same as Example 1, the difference is that the negative pressure equipment 4 in the above technical solution includes a Venturi ejector 41, the suction port of the Venturi ejector 41 (that is, the bypass port of the Venturi ejector) is connected to the negative pressure suction port 31, and the injection port of the Venturi ejector 41 is used to introduce airflow to make the chamber negative pressure, so that the airflow can be combined with the Venturi ejector to generate negative pressure at the negative pressure suction port, and the injection port of the Venturi ejector 41 is also provided with a flow valve 42, so that the flow rate of the airflow can be adjusted by the flow valve to adjust the negative pressure at the negative pressure suction port. Since the workshop has a dedicated pipeline for supplying compressed air, the pipeline for supplying compressed air can be connected to the injection port of the Venturi ejector at this time, and the ejected airflow makes its suction port negative pressure (wherein the airflow velocity of the injection port is positively correlated with the negative pressure value at the suction port, that is, the greater the flow velocity of the injection port, the greater the negative pressure value of the suction port), thereby making the chamber negative pressure.

[0039] It should be noted that the above detailed description is illustrative and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0040] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0041] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present application described herein can, for example, be implemented in an order other than that illustrated or described herein.

[0042] Also, when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementations.

[0043] In addition, the terms "comprises" and "having" and any variations thereof are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, product or apparatus.

[0044] For ease of description, spatially relative terms, such as "on," "above," "on the upper surface of," and "upper," may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

[0045] For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above" can encompass both an orientation of "above" and "below." The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0046] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in this industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with this profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A thin-walled cavity part processing tool, which is used to support a thin-walled cavity part (1), wherein the thin-walled cavity part (1) has a cylindrical thin-walled area (11) and two integrally formed connecting flanges (12) connected to both ends of the thin-walled area (11), characterized in that: The thin-walled cavity part (1) comprises a core (2) and two blocking blocks (3), wherein the thin-walled cavity part (1) is arranged horizontally along the front-back direction, the core (2) is in the shape of a straight bar and matches the inner hole of the thin-walled cavity part (1), the core (2) is inserted into the thin-walled cavity part (1), and its two ends are respectively located in the two connecting flanges (12), the two blocking blocks (3) are respectively distributed at the two ends of the thin-walled cavity part (1) along the front-back direction, and the two blocking blocks (3) are respectively detachable. The connecting flanges (12) are sealed at one end away from each other, and the thin-walled cavity part (1) and the two blocking blocks (3) together enclose a cavity, wherein one of the blocking blocks (3) is provided with a negative pressure suction port (31) connected to the cavity, and the negative pressure suction port (31) is used to communicate with the suction port of the negative pressure device (4) to draw negative pressure into the cavity, and to deform the thin-walled area (11) of the thin-walled cavity part (1) to fit on the core (2).

2. The thin-walled cavity parts processing tool according to claim 1, characterized in that: The negative pressure suction port (31) is arranged at an end of the corresponding block (3) away from the other block (3).

3. The thin-walled cavity parts processing tool according to claim 2, characterized in that: A groove (32) is provided in the middle of each of the two blocking blocks (3) near one end, and a sealing ring (33) protruding from the groove is provided at the notch of each of the grooves (32). The sealing ring (33) on each of the blocking blocks (3) is used to seal against the edge of the corresponding connecting flange (12), and the negative pressure suction port (31) is connected to the groove (32) on the corresponding blocking block (3).

4. The thin-walled cavity parts processing tool according to claim 1, characterized in that: The length of the core (2) is shorter than the length of the thin-walled cavity part (1), but longer than the length of the thin-walled region (11).

5. The thin-walled cavity parts processing tool according to claim 1, characterized in that: The core (2) is a hard alloy rod.

6. The thin-walled cavity parts processing tool according to any one of claims 1 to 5, characterized in that: The negative pressure device (4) is a negative pressure pump or a vacuum pump.

7. The thin-walled cavity parts processing tool according to any one of claims 1 to 5, characterized in that: The negative pressure device (4) comprises a Venturi ejector (41), the suction port of the Venturi ejector (41) is connected to the negative pressure suction port (31), and the injection port of the Venturi ejector (41) is used to introduce airflow to make the chamber have a negative pressure.

8. The thin-walled cavity parts processing tool according to claim 7, characterized in that: A flow valve (42) is also provided at the injection port of the Venturi ejector (41).

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