Positioning and clamping tool

Abstract

The invention relates to a positioning and clamping tool which comprises a supporting bottom plate of an annular structure, and the annular structure comprises an outer ring and an inner ring which are connected with each other; the multiple outer circle fixing pieces are evenly distributed on the outer ring of the supporting bottom plate, and a profiling structure is arranged on the inner side of each outer circle fixing piece and used for abutting against the outer circle face of the large end of the sectioning workpiece; the multiple inner circle positioning pieces are detachably connected to the inner ring of the supporting bottom plate and abut against the inner circle face of the sectioning workpiece, and a clamping space is reserved between the inner circle positioning pieces and the outer circle fixing piece and used for positioning and clamping the workpiece; and the locking piece is connected with the supporting bottom plate and used for locking the sectioning workpiece on the supporting bottom plate. According to the positioning and clamping tool, through the profiling structure and the detachable connection mode, stress concentration caused by sawing machine cutting to the workpiece is avoided, meanwhile, damage caused by welding or embedded clamping to the metallographic material or shape of the workpiece is avoided, and the high-precision requirement for surface and shape machining of the multi-petal type thin-wall workpiece can be met.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and in particular to a positioning and clamping tool. Background Technology

[0002] In the combustion chamber of a gas turbine, diffusers are typically installed to control airflow magnitude and direction. Due to the complex and compact internal structure of the gas turbine, diffusers cannot be designed as a single circle; they are usually segmented with thin walls. Both the inner and outer surfaces of the diffuser are smooth gas flow channels, so flange structures cannot be installed at the joint surfaces between the segments for connection. Furthermore, this product requires high machining precision, and segmented machining is insufficient to meet this precision requirement during finishing. A common method is to cast the product blank as a single circle, finish it, and then cut it into multiple segments using a saw. However, this approach cannot eliminate the stress after cutting the single-circle workpiece, resulting in severe deformation after segmentation and failing to meet the required precision. Summary of the Invention

[0003] Therefore, it is necessary to provide a positioning and clamping tool to address the problems of deformation and uneven stress release that easily occur during the precision machining of segmented thin-walled workpieces, which make it difficult to meet high precision requirements.

[0004] The present invention provides a positioning and clamping tool, comprising:

[0005] The supporting base plate has a ring structure, which includes an outer ring and an inner ring that are connected to each other.

[0006] The outer circle fasteners are evenly distributed on the outer ring of the support base plate. The inner side of the outer circle fasteners is provided with a contour structure for abutting against the outer circle surface of the large end of the segmented workpiece.

[0007] The inner circle positioning component, a plurality of the inner circle positioning components are detachably connected to the inner ring of the support base plate and abut against the inner circle surface of the segmented workpiece. A clamping space is left between the inner circle positioning component and the outer circle fixing component for positioning and clamping the workpiece.

[0008] A locking element, connected to the support base plate, is used to lock the segmented workpiece onto the support base plate.

[0009] In one embodiment, the locking member includes an adjustable height support and a pressure plate. One end of the adjustable height support is connected to the pressure plate, the pressure plate contacts the end face of the large end of the workpiece, and the other end of the adjustable height support is connected to the inner ring of the support base plate.

[0010] In one embodiment, the locking member further includes a second connector and a fastener, wherein the pressure plate and the inner ring of the support base plate are threadedly connected via the second connector, and the fastener abuts against the pressure plate and is threadedly connected to the second connector.

[0011] In one embodiment, the adjustable height support is a telescopic cylinder or a telescopic rod.

[0012] In one embodiment, the outer circular fixing member has a contoured structure that is an arc surface, which matches the outer circular surface of the large end of the segmented workpiece.

[0013] In one embodiment, the supporting base plate has a stepped inner circle, which is disposed on the inner ring, and the height of the stepped inner circle is lower than the height of the outer ring; the inner circle positioning member further includes a first adjusting member and a second adjusting member that are threadedly connected to the body of the inner circle positioning member, the first adjusting member passing through the lower part of the body of the inner circle positioning member and abutting against the inner sidewall of the stepped inner circle, and the second adjusting member passing through the upper part of the body of the inner circle positioning member and abutting against the inner circle surface of the segmented workpiece.

[0014] In one embodiment, the inner circle positioning member further includes a first connector, of which there are at least two, and the base plate of the body of the inner circle positioning member is connected to the inner ring of the supporting base plate through the first connector.

[0015] In one embodiment, the first connector is a connecting bolt.

[0016] The aforementioned positioning and clamping tool connects an outer circular fixing component, an inner circular positioning component, and a locking component via a supporting base plate to form a positioning and clamping space for a segmented thin-walled workpiece. Multiple outer circular fixing components, evenly distributed on the outer ring of the supporting base plate, conform to the contour structure and tightly abut against the outer circular surface of the large end of the segmented workpiece, achieving outer circular limitation of the segmented workpiece. Simultaneously, multiple inner circular positioning components are detachably connected to the inner ring of the supporting base plate, precisely positioning the inner circle of the segmented workpiece from the inside. The segmented workpiece is clamped by the limiting abutment of the outer circular fixing components and the inner circular positioning components in two directions. Finally, the locking component connects to the supporting base plate and locks the segmented workpiece onto the supporting base plate, forming a stable, complete circular structure, facilitating subsequent precision machining of the segmented workpiece. This positioning and clamping tool, through its contouring structure and detachable connection, avoids stress concentration on the workpiece caused by sawing, and also avoids damage to the metallographic material or shape of the workpiece caused by welding or embedded clamping. It can achieve high-precision processing of the surface and shape of multi-lobed thin-walled workpieces, and significantly improves the processing quality and consistency of segmented thin-walled workpieces. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the overall structure of the positioning and clamping tool in one embodiment;

[0018] Figure 2 This is a schematic diagram showing the connection between the support base plate and the outer circular fixing member of the positioning and clamping tool in one embodiment;

[0019] Figure 3 This is a schematic diagram of the outer circular fixing component of the positioning and clamping tool in one embodiment;

[0020] Figure 4 A schematic diagram of the structure of the inner circle positioning component of the positioning clamping tool in one embodiment;

[0021] Figure 5 A schematic diagram of the locking element of the positioning and clamping tool in one embodiment.

[0022] Label Explanation:

[0023] 101. Support base plate; 102. Outer circle fixing component; 103. Inner circle positioning component; 104. Locking component; 105. Split workpiece;

[0024] 1011. Suspension point; 1012. Inner circle of the step;

[0025] 1021. Contouring structure; 1022. Reinforcing ribs;

[0026] 1031. First connecting member; 1032. First adjusting member; 1033. Second adjusting member;

[0027] 1041. Adjustable height support; 1042. Second connector; 1043. Pressure plate; 1044. Fastener. Detailed Implementation

[0028] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0034] See Figures 1-5 An embodiment of the present invention provides a positioning and clamping tool, comprising: a supporting base plate 101, which is an annular structure, the annular structure including an outer ring and an inner ring connected to each other; an outer circle fixing member 102, a plurality of the outer circle fixing members 102 being evenly distributed on the outer ring of the supporting base plate 101, the inner side of the outer circle fixing member 102 being provided with a contour structure 1021 for abutting against the outer circle surface of the large end of the segmented workpiece 105; an inner circle positioning member 103, a plurality of the inner circle positioning members 103 being detachably connected to the inner ring of the supporting base plate 101 and abutting against the inner circle surface of the segmented workpiece 105, a clamping space being left between the inner circle positioning member 103 and the outer circle fixing member 102 for positioning and clamping the workpiece; and a locking member 104, connected to the supporting base plate 101 for locking the segmented workpiece 105 onto the supporting base plate 101. This positioning and clamping tool connects an outer circular fixing member 102, an inner circular positioning member 103, and a locking member 104 via a support base plate 101 to form a positioning and clamping space for a segmented thin-walled workpiece. Multiple outer circular fixing members 102, evenly distributed on the outer ring of the support base plate 101, form a contoured structure 1021 that tightly abuts against the outer circular surface of the large end of the segmented workpiece 105, thus limiting the outer circle of the segmented workpiece 105. Simultaneously, multiple inner circular positioning members 103 are detachably connected to the inner ring of the support base plate 101, precisely positioning the inner circle of the segmented workpiece 105 from the inside. The segmented workpiece 105 is clamped by the limiting abutment of the outer circular fixing members 102 and the inner circular positioning members 103 in two directions. Finally, the locking member 104 connects to the support base plate 101, locking the segmented workpiece 105 onto the support base plate 101. This clamping creates a stable, complete circular structure, facilitating subsequent precision machining of the segmented workpiece 105. This positioning and clamping tool, through its contour structure 1021 and detachable connection, avoids stress concentration on the workpiece caused by sawing, and also avoids damage to the metallographic material or shape of the workpiece caused by welding or embedded clamping. It can achieve high-precision processing of the surface and shape of multi-lobed thin-walled workpieces, and greatly improves the processing quality and consistency of segmented thin-walled workpieces.

[0035] To facilitate precision machining of the workpiece without interference, the pressure plate 1043 may optionally be in partial contact with the end face of the larger end of the segmented workpiece 105. Specifically, the end face of the pressure plate 1043 and the end face of the larger end of the segmented workpiece 105 may partially overlap in the thickness direction of the annular workpiece. This facilitates the machining of grooves on the cross-section of the larger end of the segmented workpiece 105 and the subsequent precision machining of these grooves. Figure 1 As shown, after processing, the pressure plate 1043 can maintain contact with the side wall of the groove at the large end of the segmented workpiece 105.

[0036] Optionally, in one embodiment, every two outer circular fixing members 102, the inner circular positioning members 103, and one locking member 104 form an assembly clamping unit. In each assembly clamping unit, the locking member 104 is disposed between two pairs of outer circular fixing members 102 and inner circular positioning members 103, for a total of 6 sets, such as... Figure 1 As shown. Another pair of the outer circular fixing members 102 and the inner circular positioning members 103 are disposed on the centerline or approximately the centerline of the support base plate 101. The six assembly clamping components are evenly or nearly evenly distributed on both sides of the centerline of the support base plate 101, as shown. Figure 1 and Figure 2 As shown.

[0037] like Figure 1 and Figure 5 As shown, in one embodiment, the locking member 104 includes an adjustable height support member 1041 and a pressure plate 1043. One end of the adjustable height support member 1041 is connected to the pressure plate 1043, and the pressure plate 1043 contacts the end face of the large end of the workpiece. The other end of the adjustable height support member 1041 is connected to the inner ring of the support base plate 101. During clamping, by adjusting the length of the adjustable height support member 1041, the pressure plate 1043 is made to tightly press against the end face of the workpiece, thereby achieving axial locking of the workpiece. The adjustable height support member 1041 allows for flexible adjustment according to the actual height of the workpiece, ensuring clamping stability.

[0038] like Figures 1-5 As shown, for convenient connection and fastening, in one embodiment, the locking member 104 further includes a second connector 1042 and a fastener 1044. The pressure plate 1043 is threadedly connected to the inner ring of the support base plate 101 via the second connector 1042. The fastener 1044 abuts against the pressure plate 1043 and is threadedly connected to the second connector 1042. The cooperation between the second connector 1042 and the fastener 1044 enables quick assembly and disassembly, improving production efficiency, while the threaded connection ensures locking.

[0039] In one embodiment, the adjustable height support 1041 is a telescopic cylinder or telescopic rod. Optionally, a sleeve-type design is adopted, with the length of two or three sleeve sections locked by threads or pins. An electric telescopic rod can also be used to achieve height adjustment.

[0040] Optionally, the first connector 1031 is a long bolt, one end of which is connected to the pressure plate 1043 and the other end of which is connected to the support base plate 101. The fastener 1044 is a nut.

[0041] In one embodiment, the contour structure 1021 of the outer circle fixing member 102 is an arc surface, which matches the outer circle surface of the large end of the segmented workpiece 105 to achieve a high degree of fit with the outer circle of the workpiece, avoid point contact or line contact, disperse clamping force, and protect the surface of the thin-walled workpiece.

[0042] Optionally, the inner side of the outer circular fixing member 102 is further provided with a flat portion, which is located below the contouring structure 1021 to provide support for the contouring structure 1021.

[0043] Optionally, the outer side of the outer circular fixing member 102 is further provided with reinforcing ribs 1022 to improve stability.

[0044] In one embodiment, such as Figure 1 , Figure 4 As shown, the supporting base plate 101 is provided with a stepped inner circle 1012, which is disposed on the inner ring, and the height of the stepped inner circle 1012 is lower than the height of the outer ring; the inner circle positioning member 103 also includes a first adjusting member 1032 and a second adjusting member 1033 that are threadedly connected to the body of the inner circle positioning member 103. The first adjusting member 1032 passes through the lower part of the body of the inner circle positioning member 103 and abuts against the inner sidewall of the stepped inner circle 1012, and the second adjusting member 1033 passes through the upper part of the body of the inner circle positioning member 103 and abuts against the inner circle surface of the segmented workpiece 105.

[0045] like Figures 1-2 As shown, optionally, the inner edge of the inner circle 1012 of the step is further provided with at least three protruding lifting points 1011. Each lifting point 1011 has a lifting hole, and the plurality of lifting points 1011 are evenly distributed on the inner circle 1012 of the step for overall product transfer. By using this positioning and clamping tool to clamp the product, it remains connected as a whole, achieving overall product transfer and solving the problem of deformation of thin-walled products caused by lifting.

[0046] Optionally, the first adjusting member 1032 and the second adjusting member 1033 are screws or set screws.

[0047] like Figures 1-4As shown, in one embodiment, the inner circle positioning member 103 further includes a first connecting member 1031, and there are at least two first connecting members 1031. The bottom plate of the body of the inner circle positioning member 103 is connected to the inner ring of the supporting bottom plate 101 through the first connecting member 1031.

[0048] In one embodiment, the first connector 1031 is a connecting bolt.

[0049] The aforementioned positioning and clamping tool connects the outer circular fixing member 102, the inner circular positioning member 103, and the locking member 104 via a support base plate 101 to form a positioning and clamping space for the segmented thin-walled workpiece. Multiple outer circular fixing members 102, evenly distributed on the outer ring of the support base plate 101, form a contoured structure 1021 that tightly abuts against the outer circular surface of the large end of the segmented workpiece 105, thus limiting the outer circle of the segmented workpiece 105. Simultaneously, multiple inner circular positioning members 103 are detachably connected to the inner ring of the support base plate 101, precisely positioning the inner circle of the segmented workpiece 105 from the inside. The segmented workpiece 105 is clamped by the limiting abutment of the outer circular fixing member 102 and the inner circular positioning member 103 in two directions. Finally, the locking member 104 connects to the support base plate 101, locking the segmented workpiece 105 onto the support base plate 101. This clamping forms a stable, complete circular structure, facilitating subsequent precision machining of the segmented workpiece 105. This positioning and clamping tool, through its contour structure 1021 and detachable connection, avoids stress concentration on the workpiece caused by sawing, and also avoids damage to the metallographic material or shape of the workpiece caused by welding or embedded clamping. It can achieve high-precision processing of the surface and shape of multi-lobed thin-walled workpieces, and greatly improves the processing quality and consistency of segmented thin-walled workpieces.

[0050] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A positioning and clamping tool, characterized in that, The positioning and clamping tool includes: The supporting base plate has a ring structure, which includes an outer ring and an inner ring that are connected to each other. The outer circle fasteners are evenly distributed on the outer ring of the support base plate. The inner side of the outer circle fasteners is provided with a contour structure for abutting against the outer circle surface of the large end of the segmented workpiece. The inner circle positioning component, a plurality of the inner circle positioning components are detachably connected to the inner ring of the support base plate and abut against the inner circle surface of the segmented workpiece. A clamping space is left between the inner circle positioning component and the outer circle fixing component for positioning and clamping the workpiece. A locking element, connected to the support base plate, is used to lock the segmented workpiece onto the support base plate.

2. The positioning and clamping tool according to claim 1, characterized in that, The locking component includes an adjustable height support and a pressure plate. One end of the adjustable height support is connected to the pressure plate, and the pressure plate contacts the end face of the large end of the workpiece. The other end of the adjustable height support is connected to the inner ring of the support base plate.

3. The positioning and clamping tool according to claim 2, characterized in that, The locking component also includes a second connector and a fastener. The pressure plate and the inner ring of the support base plate are threadedly connected through the second connector. The fastener abuts against the pressure plate and is threadedly connected to the second connector.

4. The positioning and clamping tool according to claim 2, characterized in that, The adjustable height support is a telescopic cylinder or a telescopic rod.

5. The positioning and clamping tool according to claim 1, characterized in that, The outer circular fixing component has a contoured structure with an arc surface, which matches the outer circular surface of the large end of the segmented workpiece.

6. The positioning and clamping tool according to claim 1, characterized in that, The supporting base plate has a stepped inner circle, which is disposed on the inner ring, and the height of the stepped inner circle is lower than the height of the outer ring; the inner circle positioning component also includes a first adjusting component and a second adjusting component that are threadedly connected to the body of the inner circle positioning component. The first adjusting component passes through the lower part of the body of the inner circle positioning component and abuts against the inner sidewall of the stepped inner circle, and the second adjusting component passes through the upper part of the body of the inner circle positioning component and abuts against the inner circle surface of the segmented workpiece.

7. The positioning and clamping tool according to claim 1, characterized in that, The inner circle positioning component further includes a first connecting component, of which there are at least two. The base plate of the body of the inner circle positioning component is connected to the inner ring of the supporting base plate through the first connecting component.

8. The positioning and clamping tool according to claim 7, characterized in that, The first connecting component is a connecting bolt.

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