A self-adjusting positioning method and dedicated device for thin-walled parts

Abstract

This invention belongs to the field of metal tubular component irregular structure processing technology, specifically relating to a self-adjusting positioning method and dedicated device for thin-walled parts. The self-adjusting positioning method includes the following steps: Step 1: Prepare the thin-walled part to be formed; Step 2: Assemble the left-end adjustment component in the left core mold and the right-end adjustment component in the right core mold; Step 3: Connect the mandrel to the main shaft of the equipment with high precision, and connect the mandrel, left core mold, connecting body and right core mold in sequence; Step 4: The inner surfaces of the left and right core molds are used to place the thin-walled part, and the annular groove between the left and right core molds is used for forming the thin-walled part. During the forming process of the thin-walled part, the left-end adjustment component and the right-end adjustment component synchronously control the feed amount, pushing the two ends of the thin-walled part to feed towards the annular groove. This invention, by designing the left and right core molds to adopt a full contact method to round the thin-walled part, and by designing the left and right end adjustment components to achieve effective control of the feed amount during the forming process, ensures the forming accuracy.

Description

Technical Field

[0001] This invention belongs to the field of special-shaped metal tubular parts processing technology, specifically relating to a self-adjusting positioning method and special device for thin-walled parts. Background Technology

[0002] Thin-walled metal tubes require high-precision machining of outward protrusions in the circumferential direction. Due to the large deformation of the ultra-thin workpiece, it is elliptical in its natural state. Using ordinary positioning and clamping methods to ensure high forming accuracy is a difficult problem in the field of machining. Therefore, based on the structural design dimensions and accuracy requirements of the workpiece, a self-adjusting positioning method for thin-walled parts is studied, and a special device is developed, which has important practical significance.

[0003] The difficulty in solving the above technical problems lies in the fact that ordinary positioning and clamping methods can hardly guarantee high forming accuracy for thin-walled metal tubes, and there are currently no relevant technical reports on self-adjusting positioning methods and special devices for such thin-walled parts as a reference.

[0004] The significance of solving the above technical problems lies in: designing a self-adjusting positioning method and a special device for thin-walled parts to achieve high-precision outward protrusion forming of metal tubes and meet the design accuracy requirements. This has very important practical significance for the high-precision processing of thin-walled metal tubes. Summary of the Invention

[0005] The present invention aims to achieve high-precision positioning and forming of ultra-thin-walled metal tubes. Its purpose is to develop a self-adjusting positioning method and a special device for thin-walled parts, so as to achieve high-precision outward protrusion forming of metal tubes and meet the design accuracy requirements.

[0006] The technical solution adopted by the present invention to solve this problem is as follows:

[0007] A self-adjusting positioning method for a thin-walled component includes the following steps:

[0008] Step 1: Preparing materials

[0009] Prepare the thin-walled parts to be formed;

[0010] Step 2: Adjust and assemble the left and right end components.

[0011] Assemble the left adjustment component into the left core mold and the right adjustment component into the right core mold;

[0012] Step 3: Assemble the positioning components

[0013] Connect the mandrel to the main spindle of the equipment with high precision, and connect the mandrel, left mandrel, connecting body and right mandrel in sequence;

[0014] Step 4: Self-adjusting positioning

[0015] The inner surfaces of the left and right core molds are used to place the thin-walled parts. The annular groove between the left and right core molds is used for the forming of the thin-walled parts. During the forming process of the thin-walled parts, the left and right adjustment components synchronously control the feed amount and push the two ends of the thin-walled parts to feed towards the annular groove.

[0016] The second objective of this invention is to provide a dedicated device for applying the above-described self-adjusting positioning method for thin-walled components, comprising:

[0017] A positioning assembly includes a left core mold and a right core mold for placing a thin-walled part, wherein an annular groove for forming the thin-walled part is formed between the left core mold and the right core mold;

[0018] A left-end adjustment component is disposed within the left core mold. The left-end adjustment component includes a left fixed base, a left adjustment block, and a left-end elastic adjustment structure disposed between the two.

[0019] The right-end adjustment component is located inside the right core mold. The right-end adjustment component includes a right fixed seat, a right adjusting block, and a right-end elastic adjustment structure located between the two.

[0020] The inner surfaces of the left and right core molds are used to place thin-walled parts. An annular groove for forming thin-walled parts is formed between the left and right core molds. The left and right adjusting blocks are used to control the feed amount during the forming process of thin-walled parts.

[0021] Preferably, the positioning assembly includes a mandrel, a left mandrel, a connector, and a right mandrel connected in sequence.

[0022] More preferably, the inner surfaces of the left and right core molds are circular structures of the same size, and the two ends of the inner surface of the connector are respectively wrapped around the outer surfaces of the left and right core molds. The left core mold is fixed to the connector by a fastener, and the right core mold is connected to the connector by a first axial adjustment structure.

[0023] More preferably, the first axial adjustment structure includes an internal thread formed on the inner surface of the connecting body and an external thread formed on the outer surface of the right mandrel, wherein the right mandrel is threadedly connected to the connecting body.

[0024] In a further preferred embodiment, the left core mold is also provided with an adjusting pad for adjusting the width of the annular groove at one end near the right core mold.

[0025] More preferably, the inner surface of the left core mold away from the right core mold is looped around the outer surface of the mandrel, and the left core mold and the mandrel are fixed together by a fastener.

[0026] More preferably, the left fixed seat and the left core mold are connected by a second axial adjustment structure.

[0027] Wherein: the second axial adjustment structure includes an internal thread made on the inner surface of the left core mold and an external thread made on the outer surface of the left fixed seat, wherein the left fixed seat is threadedly connected to the left core mold.

[0028] More preferably, the right fixed seat and the right core mold are connected by a third axial adjustment structure.

[0029] Wherein: the third axial adjustment structure includes an internal thread made on the inner surface of the right core mold and an external thread made on the outer surface of the right fixed seat, and the right fixed seat is threadedly connected to the right core mold.

[0030] More preferably, the left end elastic adjustment structure includes: a threaded hole made on the left fixed seat, a left stud threaded in the threaded hole, the left stud connecting the left adjusting block to the left fixed seat, and a left spring also being sleeved on the left stud between the left adjusting block and the left fixed seat.

[0031] More preferably, the right-end elastic adjustment structure includes: a threaded hole made on the right fixed seat, a right stud threaded into the threaded hole, the right stud connecting the right adjusting block to the right fixed seat, and a right spring also being sleeved on the right stud between the right adjusting block and the right fixed seat.

[0032] The advantages and positive effects of this invention are as follows: This invention studies a self-adjusting positioning method and special equipment for thin-walled parts. By designing the left and right core molds to make the thin-walled parts round through full contact, and designing left and right end adjustment components with left and right end elastic adjustment structures respectively, the feed amount during the forming process of thin-walled parts can be effectively controlled, ensuring forming accuracy and meeting extremely high design accuracy requirements. Attached Figure Description

[0033] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that these drawings are designed for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, unless specifically indicated, these drawings are intended only to conceptually illustrate the structural construction described herein and are not necessarily drawn to scale.

[0034] Figure 1 This is a schematic diagram of the structure of the present invention.

[0035] In the diagram, 1. mandrel, 2. left mandrel, 3. left fixed seat, 4. thin-walled part, 5. connector, 6. adjusting shim, 7. right mandrel, 8. fixing bolt, 9. screw, 10. right adjusting block, 11. right fixed seat, 12. right spring, 13. right stud, 14. left stud, 15. left adjusting block, 16. left spring, 17. annular groove. Detailed Implementation

[0036] First, it should be noted that the specific structure, features, and advantages of the present invention will be described in detail below by way of examples. However, all descriptions are for illustrative purposes only and should not be construed as limiting the present invention in any way. Furthermore, any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature shown or implied in the accompanying drawings, can still be arbitrarily combined or deleted among these technical features (or their equivalents) to obtain more other embodiments of the present invention that may not be directly mentioned herein. Additionally, for the sake of simplifying the drawings, the same or similar technical features may be indicated only in one place in the same drawing.

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," and "screw-in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. The invention will now be described in detail with reference to the accompanying drawings.

[0038] Example 1:

[0039] A self-adjusting positioning method for a thin-walled component includes the following steps:

[0040] Step 1: Preparing materials

[0041] Prepare the thin-walled parts to be formed;

[0042] Step 2: Adjust and assemble the left and right end components.

[0043] Assemble the left adjustment component into the left core mold and the right adjustment component into the right core mold;

[0044] Step 3: Assemble the positioning components

[0045] Connect the mandrel to the main spindle of the equipment with high precision, and connect the mandrel, left mandrel, connecting body and right mandrel in sequence;

[0046] Step 4: Self-adjusting positioning

[0047] The inner surfaces of the left and right core molds are used to place the thin-walled parts. The annular groove between the left and right core molds is used for the forming of the thin-walled parts. During the forming process of the thin-walled parts, the left and right adjustment components synchronously control the feed amount and push the two ends of the thin-walled parts to feed towards the annular groove.

[0048] This embodiment studies a self-positioning method for thin-walled parts. By designing the left and right core molds to make full contact, the workpiece (thin-walled part) is rounded. The left and right end adjustment components with elastic adjustment structures on the left and right ends are designed to effectively control the feed amount during the forming process, ensuring the forming accuracy and meeting the extremely high design accuracy requirements.

[0049] Example 2:

[0050] like Figure 1 As shown, a special device for positioning and forming thin-walled parts using the self-adjusting positioning method described above is provided. The device includes: a positioning assembly comprising a left core mold 2 and a right core mold 7 for placing the thin-walled part 4, wherein an annular groove 17 for forming the thin-walled part is formed between the left core mold 2 and the right core mold 7; a left-end adjustment assembly disposed within the left core mold 2, comprising a left fixed seat 3, a left adjusting block 15, and a left-end elastic adjustment structure disposed between the two; and a right-end adjustment assembly disposed within the right core mold 7, comprising a right fixed seat 11, a right adjusting block 10, and a right-end elastic adjustment structure disposed between the two.

[0051] In this embodiment, the inner surfaces of the left core mold 2 and the right core mold 7 are used to place the thin-walled part 4. An annular groove 17 for forming the thin-walled part is formed between the left core mold 2 and the right core mold 7. The left adjusting block 15 and the right adjusting block 10 are used to control the feed amount during the forming process of the thin-walled part 4. Specifically: during operation, such as... Figure 1 As shown, the left-end adjustment component is installed and fixed at the inner circle of the left core mold 2. The thin-walled part 4 is placed at the right end of the inner surface of the left core mold 2 and the left end of the inner surface of the right core mold 7. The right-end adjustment component is installed and fixed at the inner circle of the right core mold 7. After the left core mold 2, the connecting body 5, the thin-walled part 4 and the right core mold 7 are assembled, when the middle part of the thin-walled part 4 protrudes outward to form, the left adjustment block 15 moves to the right and the right adjustment block 10 moves to the left and the right respectively under the elastic action of the left-end elastic adjustment structure and the right adjustment block 10 moves to the right and the left respectively under the elastic action of the right-end elastic adjustment structure, pushing the two ends of the thin-walled part 4 to feed towards the forming annular groove 17, thereby ensuring the forming accuracy.

[0052] Furthermore, in this embodiment, the positioning assembly may include a mandrel 1, a left mandrel 2, a connecting body 5, and a right mandrel 7 connected in sequence. The positioning assembly achieves rotational motion by connecting the mandrel 1, which has a modulus taper, to the main shaft of the equipment with high precision. The left mandrel 2 is mounted on the mandrel 1, the inner surface of the connecting body 5 mates with the outer surface of the left mandrel 2, and the middle part of the inner surface of the connecting body 5 mates with the outer surface of the right mandrel 7.

[0053] A preferred connection method is as follows: the left end of the mandrel 1 is connected to the main shaft of the equipment to achieve rotational movement; the left end of the inner surface of the left mandrel 2 is looped around the outer surface of the right end of the mandrel 1 and fixedly installed by the fixing bolt 8; the left end adjustment component is installed on the left end of the inner surface of the left mandrel 2; the left end of the inner surface of the left mandrel 2 is threaded for threaded installation of the left fixed seat 3; the left stud 14 and the left spring 16 connect the left adjusting block 15 to the left fixed seat 3 to achieve axial movement of the left adjusting block 15; the left end of the inner surface of the connecting body 5 is looped around the middle part of the outer surface of the left mandrel 2; the right end of the inner surface of the connecting body 5 is threaded, and the right mandrel 15 is threaded. An external thread is made on the right end of the outer surface of mold 7, so that the middle part of the inner surface of the connecting body 5 is wrapped around the left end of the outer surface of the right core mold 7. The threaded installation between the right core mold 7 and the connecting body 5 realizes the axial adjustment of the position of the right core mold 7. The right end adjustment component is installed on the outer end of the inner surface of the right core mold 7. The right fixed seat 11 is installed on the right end of the inner surface of the right core mold 7. The right stud 13 and the right spring 12 connect the right adjusting block 10 to the right fixed seat 11, realizing the axial movement of the right adjusting block 10. The feed amount during the forming process of thin-walled parts is effectively controlled by the left and right end adjustment components, ensuring the forming accuracy and meeting the extremely high design accuracy requirements.

[0054] Furthermore, in this embodiment, the inner surfaces of the left core mold 2 and the right core mold 7 can be considered as circular structures of the same size, such as... Figure 1 As shown, a thin-walled component 4 is placed on the right end of the inner surface of the left core mold 2 and the left end of the inner surface of the right core mold 7. The left and right core molds are designed to make full contact to make the thin-walled component round, thereby positioning the outer circular surface of the thin-walled component. The two ends of the inner surface of the connecting body 5 are respectively wrapped around the outer surfaces of the left core mold 2 and the right core mold 7. The left core mold 2 and the connecting body 5 are fixed by a fastener, which can be, but is not limited to, a screw 9, to fix the position of the left core mold 2 and the connecting body 5. The right core mold 7 is connected to the connecting body 5 by a first axial adjustment structure to achieve axial adjustment of the position of the right core mold 7.

[0055] Furthermore, in this embodiment, the first axial adjustment structure may include an internal thread on the inner surface of the connecting body 5 and an external thread on the outer surface of the right core mold 7. The right core mold 7 is installed on the connecting body 5 by the thread, and the installation, disassembly and axial position adjustment of the right core mold 7 can be realized by rotating the right core mold 7.

[0056] Furthermore, in this embodiment, the left core mold 2 near the right core mold 7 may also be provided with an adjusting pad 6 for adjusting the width of the annular groove 17, such as... Figure 1 As shown, the adjusting pad 6 is looped around the outer surface of the right end of the left core mold 2 and is used to adjust the width of the annular groove 17.

[0057] Furthermore, in this embodiment, the inner surface of the left core mold 2 away from the right core mold 7 can be looped around the outer surface of the mandrel 1. The left core mold 2 and the mandrel 1 are fixed together by a fastener, which can be, but is not limited to, a fixing bolt 8, to fix the position between the left core mold 2 and the mandrel 1.

[0058] Furthermore, in this embodiment, the left fixed seat 3 and the left core mold 2 are connected by a second axial adjustment structure, which enables the installation, disassembly, and axial position adjustment of the left fixed seat 3 within the left core mold 2.

[0059] Preferably, the second axial adjustment structure includes an internal thread on the inner surface of the left core mold 2 and an external thread on the outer surface of the left fixed seat 3. The left fixed seat 3 is threadedly connected to the left core mold 2. By rotating the left fixed seat 3, the left fixed seat 3 can be installed, removed, and its axial position adjusted within the left core mold 2.

[0060] Furthermore, in this embodiment, the right fixed seat 11 and the right core mold 7 are connected by a third axial adjustment structure, which enables the right fixed seat 11 to be installed, disassembled, and its axial position adjusted within the right core mold 7.

[0061] Preferably, the third axial adjustment structure includes an internal thread on the inner surface of the right core mold 7 and an external thread on the outer surface of the right fixed seat 11. The right fixed seat 11 is threadedly connected to the right core mold 7. By rotating the right fixed seat 11, the installation, disassembly, and axial position adjustment of the right fixed seat 11 within the right core mold 7 can be achieved.

[0062] Furthermore, in this embodiment, the left-end adjustment assembly includes: a left fixed base 3, a left stud 14, a left adjusting block 15, and a left spring 16. The left-end elastic adjustment structure includes: a threaded hole made on the left fixed base 3, and a left stud 14 threaded into the threaded hole. The left stud 14 connects the left adjusting block 15 to the left fixed base 3. A left spring 16 is also ring-sleeved on the left stud 14 between the left adjusting block 15 and the left fixed base 3. Specifically: as shown... Figure 1 As shown, a threaded hole is made on the right side of the left fixed seat 3 for installing the left stud 14. The left stud 14 has a left spring 16 on its outer ring. The left stud 14 connects the left adjusting block 15 to the left fixed seat 3, so as to realize the axial movement of the left adjusting block 15.

[0063] Furthermore, in this embodiment, the right-end adjustment assembly includes a right fixed base 11, a right stud 13, a right adjusting block 10, and a right spring 12. The right-end elastic adjustment structure includes: a threaded hole formed on the right fixed base 11, a right stud 13 threaded into the threaded hole, the right stud 13 connecting the right adjusting block 10 to the right fixed base 11, and a right spring 12 ring-sleeved on the right stud 13 between the right adjusting block 10 and the right fixed base 11. Specifically: as... Figure 1 As shown, a right fixed seat 11 is installed on the outer end of the inner surface of the right core mold 7. A threaded hole is made on the right side of the right fixed seat 11 for installing the right stud 13. The right stud 13 has a right spring 12 on its outer ring. The right stud 13 connects the right adjusting block 10 to the right fixed seat 11, so as to realize the axial movement of the right adjusting block 10.

[0064] Specific working principle: The self-positioning device for thin-walled parts researched in this invention includes a positioning component, a left-end adjustment component, and a right-end adjustment component. The thin-walled part is placed on the right end of the inner surface of the left core mold and the left end of the inner surface of the right core mold. The left and right core molds are designed to make full contact to round the thin-walled part. The left and right end adjustment components are used to control the two ends of the thin-walled part. Under the elastic action of the left and right end elastic adjustment structures, the feed amount at both ends of the thin-walled part during the molding process can be effectively controlled by the movement of the left and right adjustment blocks. This ensures effective control of the feed amount during the molding process, guarantees molding accuracy, and meets extremely high design accuracy requirements.

[0065] The above embodiments have provided a detailed description of the present invention, but the content described is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A self-adjusting positioning method for thin-walled parts, characterized in that: Includes the following steps: Step 1: Preparing materials Prepare the thin-walled parts to be formed; Step 2: Adjust and assemble the left and right end components. Assemble the left adjustment component into the left core mold and the right adjustment component into the right core mold; Step 3: Assemble the positioning components Connect the mandrel to the main spindle of the equipment with high precision, and connect the mandrel, left mandrel, connecting body and right mandrel in sequence; Step 4: Self-adjusting positioning The inner surfaces of the left and right core molds are used to place thin-walled parts. The annular groove between the left and right core molds is used for forming the thin-walled parts. During the forming process of the thin-walled parts, the left and right adjustment components synchronously control the feed amount and push the two ends of the thin-walled parts to feed towards the annular groove. A dedicated device for applying a self-adjusting positioning method includes: The positioning assembly includes a mandrel (1), a left core mold (2), a connector (5), and a right core mold (7) connected in sequence. The left core mold (2) and the right core mold (7) are used to place the thin-walled part (4). An annular groove (17) for forming the thin-walled part is formed between the left core mold (2) and the right core mold (7). The inner surfaces of the left core mold (2) and the right core mold (7) are circular structures of the same size. The two ends of the inner surface of the connector (5) are respectively wrapped around the outer surfaces of the left core mold (2) and the right core mold (7). The left core mold (2) and the connector (5) are fixed by a fastener. The right core mold (7) and the connector (5) are connected by a first axial adjustment structure. The left-end adjustment component is located inside the left core mold (2). The left-end adjustment component includes a left fixed seat (3), a left adjusting block (15), and a left-end elastic adjustment structure located between the two. The left-end elastic adjustment structure includes a threaded hole made on the left fixed seat (3) and a left stud (14) threaded in the threaded hole. The left stud (14) connects the left adjusting block (15) to the left fixed seat (3). A left spring (16) is also ringed on the left stud (14) between the left adjusting block (15) and the left fixed seat (3). The right-end adjustment component is located inside the right core mold (7). The right-end adjustment component includes a right fixed seat (11), a right adjusting block (10), and a right-end elastic adjustment structure located between the two. The right-end elastic adjustment structure includes a threaded hole made on the right fixed seat (11) and a right stud (13) threaded in the threaded hole. The right stud (13) connects the right adjusting block (10) and the right fixed seat (11). A right spring (12) is also sleeved on the right stud (13) between the right adjusting block (10) and the right fixed seat (11).

2. The self-adjusting positioning method for a thin-walled component according to claim 1, characterized in that: The first axial adjustment structure includes an internal thread on the inner surface of the connecting body (5) and an external thread on the outer surface of the right mandrel (7), wherein the right mandrel (7) is threadedly connected to the connecting body (5).

3. The self-adjusting positioning method for a thin-walled component according to claim 1, characterized in that: The left core mold (2) is also provided with an adjustment pad (6) for adjusting the width of the annular groove (17) at one end near the right core mold (7).

4. The self-adjusting positioning method for a thin-walled component according to claim 1, characterized in that: The inner surface of the left core mold (2) away from the right core mold (7) is wrapped around the outer surface of the mandrel (1), and the left core mold (2) and the mandrel (1) are fixed together by a fastener.

5. The self-adjusting positioning method for a thin-walled component according to claim 1, characterized in that: The left fixed seat (3) and the left core mold (2) are connected by a second axial adjustment structure. The second axial adjustment structure includes an internal thread made on the inner surface of the left core mold (2) and an external thread made on the outer surface of the left fixed seat (3). The left fixed seat (3) and the left core mold (2) are threadedly connected. The right fixed seat (11) and the right core mold (7) are connected by a third axial adjustment structure. The third axial adjustment structure includes an internal thread made on the inner surface of the right core mold (7) and an external thread made on the outer surface of the right fixed seat (11). The right fixed seat (11) and the right core mold (7) are threadedly connected.

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