An extrusion deformation degree estimation system for a constant wall thickness cone

Abstract

The application provides an extrusion deformation degree estimation system for an equal-wall-thickness conical part, comprising a computer device, and the processor of the computer device realizes the following steps when executing a program: constructing a conical part model of the equal-wall-thickness conical part according to input size data; constructing a cylindrical coordinate system with the vertex of the conical part model as the origin, the central axis of the conical part model as the Z axis, and the opening direction of the conical part model as the positive direction of the Z axis; calculating the blank volume from the origin to the deformation estimation point A and the blank volume from the origin to point B; and representing and outputting the deformation degree of the part where the deformation starting point is located. The application constructs an auxiliary surface as a reference surface for determining the deformation degree, gives a calculation model of the radius of the auxiliary surface before and after deformation, and obtains the deformation degree of the inner and outer surfaces of a point on the conical part according to the calculation model, and takes the deformation degree of the inner surface as the extrusion deformation amount of the equal-wall-thickness conical part, so that the represented deformation degree is accurate and reliable, and the operation efficiency is high.

Description

Technical Field

[0001] This invention relates to the field of thin-walled conical part manufacturing technology, specifically to a system for predicting the degree of extrusion deformation of conical parts with equal wall thickness. Background Technology

[0002] With the development of green and intelligent manufacturing technologies, higher requirements are being placed on press energy control and product qualification rates in the manufacturing process. Thin-walled conical parts with uniform thickness are core components of high-end equipment such as deep-sea oil equipment, boiler equipment, high-speed rail equipment, and missile weapons. These conical parts are typical cold-extruded components. Currently, the deformation of conical parts during extrusion forming is calculated using the logarithm of the traditional thickness ratio. However, the deformation of conical parts gradually increases from the bottom to the opening, and the traditional method does not accurately reflect the actual deformation pattern. Furthermore, the traditional method has drawbacks: excessively large deformation distribution in a single pass can easily cause forging cracks; insufficient deformation distribution can lead to increased energy consumption per part, which is inconsistent with the recent trend of green and low-energy manufacturing.

[0003] Since the finished wall thickness of thin-walled conical parts is usually no more than 5mm, it is usually necessary to use multiple forming processes of blanks. The deformation process at each point is extremely difficult to characterize. Even with the use of existing three-dimensional simulation software systems, it is only possible to roughly simulate the degree of local deformation during the manufacturing process of conical parts. There is still no effective method to characterize the degree of deformation at a certain point on the inner wall of a thin-walled conical part. Summary of the Invention

[0004] At least in order to solve the technical problems mentioned in the background art, the present invention aims to provide a system for predicting the degree of extrusion deformation of tapered parts with equal wall thickness.

[0005] The present invention adopts the following technical solution.

[0006] A system for predicting the degree of extrusion deformation of a tapered component with uniform wall thickness includes a computer device, wherein the processor of the computer device executes a program to perform the following steps: S1. Construct a tapered model of a tapered part with equal wall thickness according to the input dimension data. The total height of the tapered part model is H0, the distance between the generatrices of the inner and outer tapered surfaces of the tapered part model is T, and the top cone angle is 2α. S2, Read the data of the conical part model, take the vertex of the conical part model as the origin, the central axis of the conical part model as the Z-axis, and the opening direction of the conical part model as the positive direction of the Z-axis to construct a cylindrical coordinate system; S3, read the selected deformation starting point A, the height of which is H, calculate the inner cone radius R1 of deformation starting point A according to formula (Ⅰ), the outer cone radius where the perpendicular point of deformation starting point A is located is R2, and the auxiliary circle radius of deformation starting point A is R3; where the perpendicular point of deformation starting point A is the intersection of the perpendicular line drawn from deformation starting point A to the outer cone surface and the outer cone surface. S4, calculate the billet volume V from the origin to the estimated point A according to formula (II). H , In the formula, T represents π = 3.14; S5, when the distance between the generatrices of the inner and outer conical surfaces of the conical part model becomes t, the deformation start point A is defined to move to point B; according to formula (Ⅲ), the inner conical surface radius r1 of point B, the outer conical surface radius r2 of the perpendicular point corresponding to point B, and the auxiliary circle radius of point B are calculated as r3. In the formula, h represents the vertical height of point B relative to the tip of the cone; S6, calculate the billet volume V from the origin to point B according to formula (Ⅳ). h ; S7, combining equations (II) and (IV), calculate h, r1, and r2, and characterize and output the degree of deformation at the location where the deformation begins, according to equation (V).

[0007] In this invention, the initial wall thickness of the blank of the equal wall thickness conical part does not exceed 20mm, and the thickness of a single deformation does not exceed 4mm.

[0008] In this invention, the equal wall thickness conical component is a drug-shaped cover.

[0009] Beneficial Effects: This invention can effectively characterize the deformation degree of thin-walled conical parts during the extrusion process, which helps to avoid workpiece cracking during the manufacturing process and rationally plan the deformation stages. It is of great significance for improving manufacturing yield and reducing manufacturing energy consumption, and has wide application value in major engineering projects involving conical parts, such as deep-sea oil equipment, boiler equipment, high-speed rail equipment, and missile weapons. This invention constructs an auxiliary surface as a reference surface for determining the deformation degree, provides a calculation model of the radius of this auxiliary surface before and after deformation, and obtains the deformation degree of the inner and outer surfaces of a certain point on the conical part accordingly. The deformation degree of the inner surface is used as the extrusion deformation amount of the uniform wall thickness conical part. The characterized deformation degree is accurate and reliable, and the operation efficiency is high. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the tapered component with uniform wall thickness in the embodiment and its geometric parameters before deformation; Figure 2 These are the geometric parameters of the tapered component with uniform wall thickness after deformation in the embodiment; Figure 1 In the middle: 2α - apex angle of the conical part, T - wall thickness, H0 - height of the conical part, R1 - radius of the inner conical surface at height H (i.e., the radius of the inner conical surface at the deformation starting point A), R2 - radius of the outer conical surface where the perpendicular point corresponding to the deformation starting point A is located, R3 - radius of the intersection of the horizontal extension line at height H (deformation starting point A) and the outer conical surface (i.e., the radius of the auxiliary circle); Figure 2 In the middle: 2α - apex angle of the conical part, t - wall thickness, h0 - height of the conical part, r1 - radius of the inner conical surface at height h (i.e., the radius of the inner conical surface at point B), r2 - radius of the outer conical surface where the perpendicular point corresponding to point B is located, r3 - radius of the intersection of the horizontal extension line at height h (point B) and the outer conical surface (i.e., the radius of the auxiliary circle). Detailed Implementation

[0011] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0012] Combination Figure 1 and Figure 2 As shown, a system for predicting the degree of extrusion deformation of a tapered component with uniform wall thickness includes a computer device. When the processor of the computer device executes a program, it performs the following steps: S1. Construct a tapered model of a tapered part with equal wall thickness according to the input dimension data. The total height of the tapered part model is H0 = 120mm, the distance between the generatrices of the inner and outer tapered surfaces of the tapered part model is T = 15mm, and the top cone angle is 2α = 60°. S2, Read the data of the conical part model, take the vertex of the conical part model as the origin, the central axis of the conical part model as the Z-axis, and the opening direction of the conical part model as the positive direction of the Z-axis to construct a cylindrical coordinate system; S3, read the selected deformation starting point A, the height of which is H, calculate the inner cone radius R1 of deformation starting point A according to formula (Ⅰ), the outer cone radius of the perpendicular point of deformation starting point A is R2, and the auxiliary circle radius of deformation starting point A is R3. S4, calculate the billet volume V from the origin to the estimated point A according to formula (II). H , In the formula, T represents π = 3.14; S5, when the distance between the generatrices of the inner and outer conical surfaces of the conical part model becomes t = 13mm, the deformation start point A is defined to move to point B; according to formula (Ⅲ), the inner conical surface radius r1 of point B, the outer conical surface radius r2 of the perpendicular point corresponding to point B, and the auxiliary circle radius of point B are calculated as r3. In the formula, h represents the vertical height of point B relative to the tip of the cone; S6, calculate the billet volume V from the origin to point B according to formula (Ⅳ). h ; S7, combine equations (II) and (IV) to calculate h, r1, and r2, and characterize and output the degree of deformation at the location where the deformation starts according to equation (V).

[0013] The degree of extrusion deformation of the tapered part with equal wall thickness obtained by using the extrusion deformation prediction system in Example 1 is shown in Table 1. Table 1. Degree of Extrusion Deformation of Conical Parts with Equal Wall Thickness Example 2

[0014] A system for predicting the degree of extrusion deformation of a tapered component with uniform wall thickness includes a computer device, wherein the processor of the computer device executes a program to perform the following steps: S1. Construct a tapered model of a tapered part with equal wall thickness according to the input dimension data. The total height of the tapered part model is H0 = 60mm, the distance between the generatrices of the inner and outer tapered surfaces of the tapered part model is T = 6mm, and the top tapered angle is 2α = 120°. S2, Read the data of the conical part model, take the vertex of the conical part model as the origin, the central axis of the conical part model as the Z-axis, and the opening direction of the conical part model as the positive direction of the Z-axis to construct a cylindrical coordinate system; S3, read the selected deformation starting point A, the height of which is H, calculate the inner cone radius R1 of deformation starting point A according to formula (Ⅰ), the outer cone radius of the perpendicular point of deformation starting point A is R2, and the auxiliary circle radius of deformation starting point A is R3. S4, calculate the billet volume V from the origin to the estimated point A according to formula (II). H , In the formula, T represents π = 3.14; S5, when the distance between the generatrices of the inner and outer conical surfaces of the conical part model becomes t = 4mm, the deformation start point A is defined to move to point B; according to formula (Ⅲ), the inner conical surface radius r1 of point B, the outer conical surface radius r2 of the perpendicular point corresponding to point B, and the auxiliary circle radius of point B are calculated as r3. In the formula, h represents the vertical height of point B relative to the tip of the cone; S7, combine equations (II) and (IV) to calculate h, r1, and r2, and characterize and output the degree of deformation at the location where the deformation starts according to equation (V).

[0015] The degree of extrusion deformation of the tapered part with equal wall thickness obtained by using the extrusion deformation prediction system in Example 1 is shown in Table 2. Table 2. Degree of Extrusion Deformation of Conical Parts with Equal Wall Thickness

Claims

1. A system for predicting the degree of extrusion deformation of a tapered component with uniform wall thickness, comprising a computer device, characterized in that, When a computer device's processor executes a program, it performs the following steps: S1. Construct a tapered model of a tapered part with equal wall thickness according to the input dimension data. The total height of the tapered part model is H0, the distance between the generatrices of the inner and outer tapered surfaces of the tapered part model is T, and the top cone angle is 2α. S2, Read the data of the conical part model, take the vertex of the conical part model as the origin, the central axis of the conical part model as the Z-axis, and the opening direction of the conical part model as the positive direction of the Z-axis to construct a cylindrical coordinate system; S3, read the selected deformation starting point A, the height of which is H, calculate the inner cone radius R1 of deformation starting point A according to formula (Ⅰ), the outer cone radius of the perpendicular point of deformation starting point A is R2, and the auxiliary circle radius of deformation starting point A is R3. S4, calculate the billet volume V from the origin to the estimated point A according to formula (II). H , In the formula, T represents π = 3.14; S5, when the distance between the generatrices of the inner and outer conical surfaces of the conical part model becomes t, the deformation start point A is defined to move to point B; according to formula (Ⅲ), the inner conical surface radius r1 of point B, the outer conical surface radius r2 of the perpendicular point corresponding to point B, and the auxiliary circle radius of point B are calculated as r3. In the formula, h represents the vertical height of point B relative to the tip of the cone; S6, calculate the billet volume V from the origin to point B according to formula (Ⅳ). h ; S7, combining equations (II) and (IV), calculate h, r1, and r2, and characterize and output the degree of deformation at the location where the deformation begins, according to equation (V).

2. The extrusion deformation prediction system for tapered parts with uniform wall thickness according to claim 1, characterized in that: The initial wall thickness of the blank for the equal wall thickness tapered part shall not exceed 20 mm, and the thickness of a single deformation shall not exceed 4 mm.

3. The extrusion deformation prediction system for tapered parts with uniform wall thickness according to claim 1, characterized in that: The aforementioned tapered component with uniform wall thickness is a shaped charge liner.

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