Multi-petal type workpiece finish machining tool

Abstract

The invention relates to a multi-petal type workpiece finish machining tool which comprises a bottom plate provided with an adjustable positioning connecting assembly. The base plates are detachably connected with the bottom plate, the connecting positions of the base plates and the bottom plate can be adjusted according to the size of the outer ring of the workpiece, and the base plates are used for supporting the bottom of the workpiece; the limiting structures are arranged on the bottom plate and connected with the adjustable positioning connecting assembly, and the connecting positions of the limiting structures and the adjustable positioning connecting assembly can be adjusted according to the size of the inner ring of the workpiece; and the multiple interlayers are arranged on the base plate and connected with the outer side of the limiting structure. According to the tool, the connecting positions of the multiple limiting structures can meet the requirement for limiting the inner ring of the workpiece through the adjustable positioning connecting assembly. And the whole bottom of the workpiece is stably supported through the multiple base plates. The interlayer is in direct contact with the inner ring of the workpiece, so that the overall stress of the workpiece is stable and uniform, the surface of the workpiece is protected, the surface of the workpiece is prevented from being damaged during finish machining segmentation, and the quality of the workpiece is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of machining, in particular to a multi-limb type diaphragm finishing tool. BACKGROUND

[0002] The centrifugal compressor has complex structure and high precision requirement for part finishing, especially the multi-limb type diaphragm, which is required to be integrally cast and divided into multiple limbs after finishing, and the gap width tolerance of the division position is high, and the division difficulty coefficient is large. The common tooling scheme is to use some general pressing plates, jacks and the like for limiting, but such limb dividing machining mode has poor stability, the workpiece is unevenly stressed in each direction during division, and is prone to cracking, resulting in quality problems. SUMMARY

[0003] Therefore, it is necessary to provide a multi-limb type workpiece finishing tooling which is stable and reliable, has uniform stress and is efficient in operation, aiming at the problem of poor stability during finishing of the multi-limb type workpiece.

[0004] The multi-limb type workpiece finishing tooling provided by the present application comprises:

[0005] A bottom plate is provided with an adjustable positioning connecting assembly;

[0006] A plurality of pads are detachably connected with the bottom plate, and the connection positions of the pads and the bottom plate are adjustably arranged according to the size of the outer circle of the workpiece, and the pads are used for supporting the bottom of the workpiece;

[0007] A plurality of limiting structures are arranged on the bottom plate and connected with the adjustable positioning connecting assembly, and the connection positions of the limiting structures and the adjustable positioning connecting assembly are adjustably arranged according to the size of the inner circle of the workpiece;

[0008] A plurality of interlayers are arranged on the pads and connected with the outer sides of the limiting structures.

[0009] In one embodiment, the adjustable positioning connecting assembly comprises a plurality of second fasteners and positioning pins, and the limiting structures are detachably connected with the second fasteners and the positioning pins.

[0010] In one embodiment, a first fastener is further included, and the interlayers are connected with the limiting structures through the first fastener.

[0011] In one embodiment, the interlayer is an aluminum pad.

[0012] In one embodiment, the shape of the inner side arc surface of the interlayer matches the shape of the outer side arc surface of the limiting structure, and the shape of the outer side arc surface of the interlayer matches the shape of the inner side arc surface of the workpiece.

[0013] In one embodiment, the limiting structure comprises a bottom, a rib plate and a side wall, two sides of the rib plate are connected with the bottom and the side wall respectively, and the bottom is detachably connected with the adjustable positioning connecting assembly.

[0014] In one embodiment, the bottom plate is annular or close to annular structure and uniformly provided with four extensions along the circumference, the extensions are provided with a plurality of connecting positions, and the four pads are detachably connected with the four extensions respectively.

[0015] In one embodiment, the limiting structure is four, and the four limiting structures are connected with the four extensions respectively; or, the limiting structure is six, and two of the six limiting structures are connected on two opposite extensions, and the other four limiting structures are arranged on the other two opposite extensions.

[0016] The above-mentioned multi-petal workpiece finishing tool connects the limiting structure with the bottom plate through the adjustable positioning connecting assembly on the bottom plate, adjusts the connection position of the limiting structure and the bottom plate, so that the connection position of the plurality of limiting structures can satisfy the limiting of the inner circle of the workpiece. The pad is detachably connected with the bottom plate, and the connection position of the plurality of pads and the bottom plate is adjusted, so that the plurality of pads can satisfy the stable support of the entire bottom of the workpiece. The interlayer is arranged on the pad and connected with the outer side of the limiting structure, the inner circle of the workpiece is limited by the limiting structure, and the inner circle of the workpiece is directly contacted by the interlayer, so that the overall stress of the workpiece is stable and uniform, and the protection of the surface of the workpiece is achieved, avoiding the damage of the workpiece surface during finishing division, and ensuring the quality of the workpiece finishing surface. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is the overall structure diagram of the multi-petal workpiece finishing tool in one embodiment.

[0018] Fig. 2 It is the schematic diagram of the connection between the multi-petal workpiece finishing tool and the workpiece in one embodiment.

[0019] Fig. 3 It is the structure diagram of the workpiece that can be processed by the multi-petal workpiece finishing tool in one embodiment.

[0020] REFERENCE NUMERALS:

[0021] 1, bottom plate; 2, pad; 3, interlayer; 4, limiting structure; 5, first fastener; 6, second fastener; 7, positioning pin; A, workpiece. DETAILED DESCRIPTION

[0022] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the specific embodiments of the present application will be described below in detail with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in many different manners without the specific details, and it is to be understood that the present application is not limited to the specific embodiments described below and that the specific embodiments are given for the purposes of exemplification only.

[0023] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0024] In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0025] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0027] 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.

[0028] See Figs. 1 to 3 An embodiment of the present invention provides a finishing fixture for a multi-lobed workpiece A, comprising: a base plate 1, equipped with an adjustable positioning connection assembly; pads 2, multiple pads 2 detachably connected to the base plate 1, the connection position of the pads 2 and the base plate 1 being adjustable according to the outer ring size of the workpiece A, the pads 2 supporting the bottom of the workpiece A; limiting structures 4, multiple limiting structures 4 disposed on the base plate 1 and connected to the adjustable positioning connection assembly, the connection position of the limiting structures 4 and the adjustable positioning connection assembly being adjustable according to the inner ring size of the workpiece A; and interlayers 3, multiple interlayers 3 disposed on the pads 2 and connected to the outer side of the limiting structures 4. The aforementioned finishing fixture for the multi-lobed workpiece A, through the connection between the adjustable positioning connection assembly on the base plate 1 and the limiting structures 4, achieves adjustment of the connection position between the limiting structures 4 and the base plate 1, ensuring that the connection position of the multiple limiting structures 4 satisfies the limiting of the inner ring of the workpiece A. The pads 2 are detachably connected to the base plate 1, and the connection positions of multiple pads 2 and the base plate 1 can be adjusted to ensure stable support for the entire bottom of workpiece A. The interlayer 3 is placed on the pads 2 and connected to the outside of the limiting structure 4. The limiting structure 4 limits the inner ring of workpiece A, and the interlayer 3 directly contacts the inner ring of workpiece A, ensuring stable and uniform force distribution on workpiece A. Simultaneously, it protects the surface of workpiece A, preventing damage during precision machining and ensuring the quality of the finished surface.

[0029] In one embodiment, the adjustable positioning connection assembly includes multiple second fasteners 6 and positioning pins 7, and the limiting structure 4 is detachably connected to the second fasteners 6 and the positioning pins 7. Multiple connection holes are provided on the base plate 1. By adjusting the connection between the limiting structure 4 and the connection holes at different positions on the base plate 1, and by quickly positioning and fastening it with the second fasteners 6 and positioning pins 7, the position of the limiting structure 4 relative to the base plate 1 can be adjusted to satisfy the limiting of the inner rings of different workpieces A by the multiple limiting structures 4.

[0030] In one embodiment, a first fastener 5 is also included, through which the interlayer 3 and the limiting structure 4 are connected. The first fastener 5 passes through a through-hole in the interlayer 3 and is screwed into the limiting structure 4, thereby tightly fixing the interlayer 3 to the limiting structure 4. This connection method allows the interlayer 3 to be installed and removed independently, and an appropriate shape of interlayer 3 can be replaced according to different workpiece A shapes and sizes to accommodate the limiting clamping of different workpieces A, reducing reliance on different specifications of tooling and saving tooling change steps.

[0031] Optionally, the first fastener 5 is a tension bolt or screw, and each interlayer 3 is connected to the limiting structure 4 by two, three, or four first fasteners 5, thereby achieving a detachable connection between the interlayer 3 and the limiting structure 4. Optionally, the screw is a countersunk screw.

[0032] In one embodiment, the interlayer 3 is an aluminum pad with a certain degree of toughness, which can protect the surface of workpiece A and prevent the surface of workpiece A from being scratched or indented.

[0033] In one embodiment, the shape of the inner arc surface of the interlayer 3 matches the shape of the outer arc surface of the limiting structure 4, ensuring a tight fit between the inner side of the interlayer 3 and the outer side of the limiting structure 4; the shape of the outer arc surface of the interlayer 3 matches the shape of the inner arc surface of the workpiece A, ensuring a fit between the outer side of the interlayer 3 and the inner arc surface of the workpiece A. By forming a uniform surface contact, rather than point contact, between the interlayer 3, the limiting structure 4, and the workpiece A, the clamping force and processing stress are dispersed, reducing local stress concentration on the workpiece A. This makes the workpiece A more stably and evenly stressed during processing, preventing deformation or surface damage to the workpiece A, and meeting the precision machining requirements of thin-walled or easily deformable workpieces A. It is understood that the outer arc surface of the interlayer 3 and the inner arc surface of the workpiece A are at least partially in contact, or may be in full contact, depending on the shape of the inner structure of the workpiece A. As long as the outer arc surface of the interlayer 3 can reliably limit and stably support the inner arc surface of the workpiece A, it is acceptable. Fig. 2 As shown, the outer arc surface of the interlayer 3 can fit tightly with the inner circular surface of the annular structure of the inner ring of workpiece A, thus providing reliable positioning and stable support for workpiece A without having to directly contact the entire inner wall of the internal cavity structure of workpiece A.

[0034] In one embodiment, the limiting structure 4 includes a bottom, a rib, and a sidewall. The two sides of the rib are respectively connected to the bottom and the sidewall. The bottom is detachably connected to the adjustable positioning connection assembly to enhance the overall structural strength.

[0035] In one embodiment, the base plate 1 is annular or near-annular in shape and has four extensions evenly distributed circumferentially. Each extension has multiple connection points. There are four pads 2, each detachably connected to one of the four extensions. By selecting different connection points on the extensions, the radial position of the pads 2 on the extensions can be adjusted to accommodate changes in the outer size of the workpiece A, providing comprehensive support for the bottom of workpieces A of different sizes and ensuring stability and reliability.

[0036] In one embodiment, there are four limiting structures 4, which are respectively connected to four extensions. When workpiece A needs to be divided into four petals, this connection scheme can be selected to meet the installation requirements when dividing the four-petal workpiece A.

[0037] Optionally, there are six limiting structures 4. Two of the six limiting structures 4 are respectively connected to two opposite extensions, and the other four limiting structures 4 are arranged in pairs on the other two opposite extensions. This connection scheme can be selected when workpiece A needs to be divided into six pieces, which meets the installation requirements when dividing the six-piece workpiece A. After workpiece A is divided, as follows... Fig. 3 It has six petals as shown.

[0038] Optionally, a limiting protrusion is provided on the side of the pad 2 away from the interlayer 3 to achieve limiting from the outer ring of the workpiece inward.

[0039] The aforementioned multi-lobed workpiece A finishing fixture is connected to the limiting structure 4 via an adjustable positioning connection component on the base plate 1. This allows for adjustment of the connection position between the limiting structure 4 and the base plate 1, ensuring that the connection positions of the multiple limiting structures 4 can satisfy the limiting of the inner ring of workpiece A. The pads 2 are detachably connected to the base plate 1, and the connection positions of the multiple pads 2 and the base plate 1 can be adjusted to provide stable support for the entire bottom of workpiece A. The interlayer 3 is placed on the pads 2 and connected to the outside of the limiting structure 4. The limiting structure 4 limits the inner ring of workpiece A, and the interlayer 3 directly contacts the inner ring of workpiece A, ensuring stable and uniform force distribution on workpiece A. Simultaneously, it protects the surface of workpiece A, preventing damage during finishing and ensuring the quality of the finished surface.

[0040] 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.

[0041] 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 multi-lobed workpiece finishing fixture, characterized in that, The multi-lobed workpiece finishing fixture includes: The base plate is equipped with an adjustable positioning connection component; A pad, wherein multiple pads are detachably connected to the base plate, and the connection position between the pad and the base plate is adjustable according to the outer ring size of the workpiece, the pad being used to support the bottom of the workpiece; A limiting structure, wherein multiple limiting structures are disposed on the base plate and connected to the adjustable positioning connection assembly, and the connection position between the limiting structure and the adjustable positioning connection assembly can be adjusted according to the inner circle size of the workpiece; A plurality of said interlayers are disposed on the pad and connected to the outside of the limiting structure.

2. The multi-lobed workpiece finishing fixture according to claim 1, characterized in that, The adjustable positioning connection assembly includes a plurality of second fasteners and positioning pins, and the limiting structure is detachably connected to the second fasteners and the positioning pins.

3. The multi-lobed workpiece finishing fixture according to claim 1, characterized in that, It also includes a first fastener, through which the interlayer and the limiting structure are connected.

4. The multi-lobed workpiece finishing fixture according to claim 1, characterized in that, The interlayer is an aluminum pad.

5. The multi-lobed workpiece finishing fixture according to claim 1, characterized in that, The shape of the inner arc surface of the interlayer matches the shape of the outer arc surface of the limiting structure, and the shape of the outer arc surface of the interlayer matches the shape of the inner arc surface of the workpiece.

6. The multi-lobed workpiece finishing fixture according to claim 1, characterized in that, The limiting structure includes a bottom, a rib plate, and a side wall. The two sides of the rib plate are respectively connected to the bottom and the side wall. The bottom is detachably connected to the adjustable positioning connection assembly.

7. The multi-lobed workpiece finishing fixture according to claim 1, characterized in that, The base plate is a ring-shaped or near-ring-shaped structure and has four extensions evenly arranged along the circumference. Each extension has multiple connection positions. There are four pads, and each of the four pads is detachably connected to one of the four extensions.

8. The multi-lobed workpiece finishing fixture according to claim 7, characterized in that, The limiting structure comprises four, each of which is connected to one of the four extensions; or, the limiting structure comprises six, with two of the six limiting structures connected to two opposite extensions, and the other four limiting structures arranged in pairs on two other opposite extensions.

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