An internal diameter mandrel for powder metallurgy compensated products

Abstract

The utility model relates to a kind of inner diameter core rod for powder metallurgy compensation product, including core rod main body, the one end of core rod main body is used to install to corresponding mould and drive structure, another end of core rod main body is equipped with shaft shoulder part, the outside of shaft shoulder part is connected with step working section, first conical transition section is equipped between step working section and shaft shoulder part, it is convenient to demould and with the taper offset of product blank.The utility model exists bilateral taper in the working position of inner diameter core rod, taper offset with product blank in mould shaping process, and mould itself is not greatly changed, need not new mould, only replace inner diameter core rod, practicality is very high, production process is stable, product inner diameter meets the tolerance requirement completely, and size is in middle limit position.

Description

Technical Field

[0001] This utility model relates to the field of powder metallurgy mold technology, specifically to an inner diameter mandrel used in powder metallurgy compensation products. Background Technology

[0002] When shaping blank products with inner diameters, using ordinary inner diameter mandrels results in a large taper between the upper and lower layers of the inner diameter after shaping, almost covering the upper and lower limits of the inner diameter tolerance. Various adjustment methods have been tried without improvement, causing great trouble to production. Utility Model Content

[0003] The purpose of this invention is to overcome the problems existing in the prior art and provide an inner diameter mandrel for powder metallurgy compensation products. This allows the product blank to have a certain taper before shaping, but this taper needs to be opposite to the taper of the product after shaping. The inner diameter mandrel of this invention also increases the taper. After the product with the opposite taper is shaped by the inner diameter mandrel of this invention, the inner diameter taper of the product will cancel each other out, and the final inner diameter taper will be very small.

[0004] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution: A mandrel for compensating the inner diameter of powder metallurgy products includes a mandrel body. One end of the mandrel body is used to be installed on a corresponding mold and drive structure. The other end of the mandrel body is provided with a shoulder. A stepped working section is connected to the outside of the shoulder. A first conical transition section is provided between the stepped working section and the shoulder to facilitate demolding and to offset the taper of the product blank.

[0005] Furthermore, one end of the product blank is provided with a second conical transition section that matches the first conical transition section but is opposite in direction, which facilitates demolding and taper offsetting.

[0006] Furthermore, the taper of the first conical transition section is smaller than the taper of the second conical transition section.

[0007] Furthermore, the taper range of the first conical transition section is 0.02-0.025.

[0008] Furthermore, the taper of the second conical transition section is 0.03, which facilitates taper cancellation.

[0009] The beneficial effects of this utility model are: The working position of the inner diameter mandrel of this utility model has a double-sided taper, which cancels out the taper of the product blank during the mold forming process, effectively solving the problem of product inner diameter tolerance. Moreover, the mold itself does not need to be modified much, and no new mold needs to be made. Only the inner diameter mandrel needs to be replaced. It is highly practical, the production process is stable, the inner diameter of the product fully meets the tolerance requirements, and the size is in the middle limit position. The production efficiency is significantly improved, and the quality problem is effectively improved. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 A magnified view of a portion of point D in the middle.

[0011] The labels in the diagram are as follows: 1. Mandrel body, 2. Shoulder section, 3. Stepped working section, 4. First conical transition section, 5. Product blank, 6. Second conical transition section. Detailed Implementation

[0012] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0013] like Figure 1 As shown, an inner diameter mandrel for powder metallurgy compensation products includes a mandrel body 1. One end of the mandrel body 1 is used to install onto a corresponding mold and drive structure. The other end of the mandrel body 1 is provided with a shoulder 2. A stepped working section 3 is connected to the outer side of the shoulder 2. Figure 2 As shown, a first conical transition section 4 is provided between the stepped working section 3 and the shoulder section 2, which facilitates demolding and offsets the taper of the product blank 5.

[0014] One end of the product blank 5 is provided with a second conical transition section 6 that cooperates with and is opposite to the first conical transition section 4, forming a double-sided taper, which facilitates demolding and taper cancellation.

[0015] The taper of the first conical transition section 4 is smaller than the taper of the second conical transition section 6.

[0016] The taper range of the first conical transition section 4 is 0.02-0.025.

[0017] The taper of the second conical transition section 6 is 0.03, which facilitates taper cancellation.

[0018] Furthermore, it should be noted that, unless otherwise specified or indicated, the terms "first," "second," etc., in the specification are used only to distinguish the various components, elements, steps, etc. in the specification, and are not used to indicate the logical or sequential relationships between the various components, elements, steps, etc.

[0019] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mandrel for inner diameter compensation in powder metallurgy products, characterized in that, Includes a mandrel body (1), one end of which is used to be installed on the corresponding mold and drive structure, and the other end of the mandrel body (1) is provided with a shoulder (2). A stepped working section (3) is connected to the outside of the shoulder (2), and a first conical transition section (4) is provided between the stepped working section (3) and the shoulder (2) to facilitate demolding and offset the taper of the product blank (5).

2. The inner diameter mandrel for powder metallurgy compensation products according to claim 1, characterized in that, One end of the product blank (5) is provided with a second conical transition section (6) that matches the first conical transition section (4) and is opposite to it, so as to facilitate demolding and taper offsetting.

3. The inner diameter mandrel for powder metallurgy compensation products according to claim 2, characterized in that, The taper of the first conical transition section (4) is smaller than the taper of the second conical transition section (6).

4. The inner diameter mandrel for powder metallurgy compensation products according to claim 3, characterized in that, The taper range of the first conical transition section (4) is 0.02-0.

025.

5. The inner diameter mandrel for powder metallurgy compensation products according to claim 4, characterized in that, The taper of the second conical transition section (6) is 0.03, which facilitates taper cancellation.

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