Anti-deformation machining tool for thin-walled parts

Abstract

The utility model provides an anti-deformation machining tool for a thin-wall part. The anti-deformation machining tool comprises a mandrel, a filling layer and a pressing plate. Wherein the diameter of the mandrel is smaller than the inner diameter of the thin-wall part, so that an inner cavity is formed between the mandrel and the thin-wall part; the tail end of the mandrel is provided with a first step structure which is matched with the tail end of the thin-wall part and is used for plugging; the filling layer is formed by wrapping filler with plastic cloth and is arranged in the inner cavity; the pressing plate is an annular plate which can be arranged on the mandrel in a sleeving mode and is provided with a second step structure which is matched with the front end of the thin-wall part and conducts blocking. The machining tool is high in quality stability and reliability, the filling layer wrapped by plastic can be used for supporting the thin-wall part, and the problem that machining deformation of the thin-wall part is large is solved; and moreover, the structure is simple, the assembly is convenient and quick, the universality is high, the repeated use is realized, and the overall production efficiency can be obviously improved.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, in particular to a deformation-preventing machining tooling for thin-walled parts. Background Art

[0002] Products of thin-walled parts are generally stepped shaft hollow rotary body structures, with the maximum outer diameter up to 100 - 300 mm and the length ranging from 100 - 800 mm. Such products are structural parts, and the wall thickness at the thin-walled part is generally 1 - 3 mm. Such parts are generally non-ferrous metals such as aluminum and copper. The materials themselves have low strength, are prone to deformation, and have complex structures. During the production and machining process, due to factors such as cutting heat, cutting force, and clamping force, they are extremely prone to deformation, resulting in product scrapping. The processing technology and tooling design are difficult. Currently, the method of tightening with a conforming mandrel is mostly used to control deformation, but the manufacturing cost is high, the universality is low, and it cannot be used for parts with complex structures. Currently, the following deficiencies exist in this processing technology and tooling:

[0003] (1) The traditional processing method is to machine the inner hole first and then the outer circle. When machining the outer circle, a conforming mandrel is manufactured to prevent the part from deforming. The mandrel needs to be made to fit the inner hole of the part and be able to be normally inserted and removed. When encountering parts with a small mouth and a large inside, ordinary tooling cannot be used, the design difficulty doubles, and the use effect is not good.

[0004] (2) The traditional technology and tooling have high manufacturing costs, low universality, complex assembly and use, affect the overall production efficiency, and have high comprehensive costs. Content of the Utility Model

[0005] The utility model provides a deformation-preventing machining tooling for thin-walled parts to solve the above-mentioned defects existing in the clamping and machining process of thin-walled parts.

[0006] To achieve the above object, an embodiment of the utility model provides a deformation-preventing machining tooling for thin-walled parts, including a mandrel, a filling layer, and a pressing plate; wherein, the diameter of the mandrel is smaller than the inner diameter of the thin-walled part, so that there is an inner cavity between the mandrel and the thin-walled part; the tail end of the mandrel has a first stepped structure that cooperates with and seals the tail end of the thin-walled part; the filling layer is formed by wrapping a filler with a plastic cloth and is arranged in the inner cavity; the pressing plate is an annular plate that can be sleeved on the mandrel and has a second stepped structure that cooperates with and seals the front end of the thin-walled part.

[0007] Optionally, the first stepped structure is a two-layer annular step facing the front end of the mandrel. The diameter of the inner step of the two-layer annular step matches the inner diameter of the tail end of the thin-walled part, and the diameter of the outer step is larger than the inner diameter of the tail end of the thin-walled part, so that the inner step extends into the tail end of the thin-walled part, and the outer step is stuck outside the tail end of the thin-walled part.

[0008] Optionally, the second step structure is an annular step facing the end of the mandrel. The diameter of the annular step is larger than the inner diameter of the front end of the thin-walled part, so that the front end of the annular step extends into the front end of the thin-walled part, and the rear end of the annular step is stuck outside the front end of the thin-walled part.

[0009] Optionally, the front end of the annular step has a threaded structure that matches the inner wall of the front end of the thin-walled part.

[0010] Optionally, the filler includes gypsum and plastic.

[0011] The thin-walled part anti-deformation processing tooling in the embodiment of the present utility model includes a mandrel, a filling layer, and a pressing plate. A plastic cloth including fillers such as gypsum and plastic can be used to fill the inner cavity between the mandrel and the thin-walled part, which can play a supporting role and prevent the part from deforming during the processing. The processing tooling has high quality stability and reliability. After filling the inner cavity and then processing, the deformation of the thin-walled area before and after processing is very small, which can reach within 0.05 mm, effectively solving the problems of large clamping and processing deformation of thin-walled parts.

[0012] Moreover, the processing tooling has a simple structure and is convenient and fast to assemble, which can significantly improve the overall production efficiency and reduce the production cost; in addition, the processing tooling only needs to replace the pressing plate to be applicable to thin-walled parts with different shapes and different inner holes, and it is also easy to take out the filler, with strong versatility; in addition, the processing tooling can be reused. Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 It is a schematic structural diagram of the thin-walled part anti-deformation processing tooling in the embodiment of the present utility model.

[0015] Reference Signs:

[0016] 1. Mandrel; 2. Pressing plate; 3. Plastic cloth; 4. Filler; 5. Thin-walled part. Detailed Embodiments

[0017] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following describes the specific embodiments of the present utility model in detail with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the base embodiments disclosed below.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0019] As Figure 1 shown, the anti-deformation processing tooling for thin-walled parts in the embodiment of the present utility model includes a mandrel 1, a filling layer, and a pressing plate 2. Among them, the diameter of the mandrel 1 is smaller than the inner diameter of the thin-walled part 5, so that there is an inner cavity between the mandrel 1 and the thin-walled part 5; the tail end of the mandrel 1 has a first stepped structure that cooperates with and seals the tail end of the thin-walled part 5; the filling layer is formed by wrapping a filler 4 with a plastic cloth 3 and is arranged in the inner cavity between the mandrel 1 and the thin-walled part 5; the pressing plate 2 is an annular plate that can be sleeved on the mandrel and has a second stepped structure that cooperates with and seals the front end of the thin-walled part.

[0020] In the anti-deformation processing tooling for thin-walled parts of this embodiment, the mandrel 1 penetrates into the thin-walled part 5, the filling layer is filled between the mandrel 1 and the thin-walled part 5, and the first stepped mechanism at the tail end of the mandrel 1 and the pressing plate 2 seal at both ends. During the part processing, the filling layer can play a supporting role and prevent the part from deforming; moreover, the filling layer is formed by wrapping a filler 4 with a plastic cloth 3, and the filling amount of the filler 4 can be adjusted according to the inner holes of different parts, and it can be used for inner holes of different sizes and shapes, with strong versatility.

[0021] In an optional embodiment, the first stepped structure is a two-layer annular step facing the front end of the mandrel. The two-layer annular step has an inner step and an outer step. The diameter of the inner step is larger than the diameter of the mandrel and matches the inner diameter of the tail end of the thin-walled part 5, that is, it is equal to the inner diameter of the tail end of the thin-walled part 5, which can make there be a certain gap between the mandrel 1 and the thin-walled part 5 to form an inner cavity, and make the inner step closely extend into the tail end of the thin-walled part; the diameter of the outer step is larger than the diameter of the inner step and larger than the inner diameter of the tail end of the thin-walled part, which can make the outer step be stuck outside the tail end of the thin-walled part; the inner step and the outer step cooperate to seal the tail end of the thin-walled part 5.

[0022] Further, the second step structure is an annular step facing the tail end of the mandrel 1. The diameter of the rear end of the annular step is greater than the inner diameter of the front end of the thin-walled part 5, and the diameter of the front end of the annular step is equal to the diameter of the front end of the thin-walled part 5, so that the front end of the annular step closely extends into the front end of the thin-walled part 5, and the rear end of the annular step is stuck outside the front end of the thin-walled part 5, thereby blocking the front end of the thin-walled part 5.

[0023] In this embodiment, the front end and the tail end of the mandrel 1 (i.e., the left end and the right end in the figure) are respectively the two ends corresponding to the pressing plate 2 (without a step mechanism) and the first step mechanism, and respectively correspond to the front end and the tail end of the thin-walled part 5. Further, the front end and the tail end of the thin-walled part 5 have inward annular frames, and the first step structure and the second step structure respectively cooperate with the inner diameters of the inward annular frames at the tail end and the front end of the thin-walled part 5. If there are no frames at both ends of the thin-walled part 5 in other embodiments, they directly cooperate with the inner diameters at both ends of the thin-walled part 5. Further, if the inner walls of the front and rear ends of the thin-walled part have a threaded structure, the front end of the annular step of the pressing plate 2 and the inner side step at the tail end of the mandrel 1 also have a matching threaded structure, and the front and rear ends of the thin-walled part 5 can be tightly sealed by screwing operation and threaded connection.

[0024] Optionally, the filler includes gypsum and plastic, etc. It can play a supporting role after the gypsum solidifies, and because plastic is added to the gypsum and the outside is wrapped with a plastic cloth, it is also convenient to take out the solidified gypsum after the part processing is completed, and it also avoids the remaining attachments on the inner wall of the part.

[0025] According to an exemplary embodiment of the present invention, when applying the thin-walled part anti-deformation processing tooling, for example, in processes such as heat treatment and quenching treatment of thin-walled rotary parts, the following operation process can be adopted: First, assemble the thin-walled part 5 onto the mandrel 1. The tail end of the thin-walled part 5 can be sleeved onto the mandrel from the front end of the mandrel 1, and the first step structure at the tail end of the mandrel 1 blocks the tail end of the thin-walled part; then, evenly spread the plastic cloth 3 on the inner cavity surface between the mandrel 1 and the inner wall of the thin-walled part, and then fill the filler 4 into the inner cavity (plastic cloth); then, after the gypsum solidifies, assemble and tighten the pressing plate 2 in place (with a threaded structure); then, the part can be processed. After the part processing is completed, the pressing plate 2, the mandrel 1, and the filling layer are taken out in sequence, and the part processing ends.

[0026] In the actual application scenario, for thin-walled parts of different models and different sizes, pressing plates and mandrels with corresponding sizes can be set; and this processing tooling can be reused, and only the filling layer wrapped with plastic needs to be replaced.

[0027] It should be noted that according to the needs of implementation, each component described in the embodiments of the present utility model can be split into more components, or two or more components or parts of components can be combined into new components to achieve the purpose of the embodiments of the present utility model.

[0028] The above embodiments only express several implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. A thin-walled parts anti-deformation processing tool, characterized in that: It includes a core shaft, a filling layer and a pressing plate; wherein the diameter of the core shaft is smaller than the inner diameter of the thin-walled part, so that an inner cavity is provided between the core shaft and the thin-walled part; the tail end of the core shaft has a first step structure that cooperates with and seals the tail end of the thin-walled part; the filling layer is formed by wrapping a filler with plastic cloth and is arranged in the inner cavity; the pressing plate is an annular plate that can be sleeved on the core shaft, and has a second step structure that cooperates with and seals the front end of the thin-walled part.

2. The anti-deformation processing tool for thin-walled parts according to claim 1 is characterized in that: The first step structure is a two-layer annular step facing the front end of the core shaft. The diameter of the inner step of the two-layer annular step matches the inner diameter of the tail end of the thin-walled part, and the diameter of the outer step is larger than the inner diameter of the tail end of the thin-walled part, so that the inner step extends into the tail end of the thin-walled part, and the outer step is stuck on the outside of the tail end of the thin-walled part.

3. The anti-deformation processing tool for thin-walled parts according to claim 1 is characterized in that: The second step structure is an annular step toward the rear end of the spindle, and the diameter of the annular step is larger than the inner diameter of the front end of the thin-walled part, so that the front end of the annular step extends into the front end of the thin-walled part, and the rear end of the annular step is stuck on the outside of the front end of the thin-walled part.

4. The anti-deformation processing tool for thin-walled parts according to claim 3 is characterized in that: The front end of the annular step has a thread structure matched with the inner wall of the front end of the thin-walled part.

5. The anti-deformation processing tool for thin-walled parts according to claim 1, characterized in that: The fillers include plaster and plastic.

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