CN-116037832-B - Method for drawing round section bar by using swage block

CN116037832BCN 116037832 BCN116037832 BCN 116037832BCN-116037832-B

Abstract

The invention provides a method for drawing a round section bar by using a swage anvil, which can improve the efficiency of the round section bar, and relates to the technical field of drawing. A method for drawing a round-section bar by using a swage block comprises the steps of placing the round-section bar between an upper swage block and a lower swage block, rotating by 90 degrees between each pass according to three passes, wherein the matching distance between the upper swage block and the lower swage block of each pass is equal, and drawing the round-section bar to obtain an equivalent drawing piece with the cross section area equal to the area of a theoretical drawing round section of the round-section bar. The invention has higher drawing efficiency, can better ensure that the rough blank is at higher temperature during drawing, is beneficial to drawing deformation and can improve drawing forming quality.

Inventors

XIE XIAOCHUAN
ZHANG HAICHENG
LUO HENGJUN
ZENG DETAO
SHEN WENTAO
ZHANG FUQI

Assignees

中国第二重型机械集团德阳万航模锻有限责任公司

Dates

Publication Date: 20260512
Application Date: 20230210

Claims (3)

1. A method for drawing round section bar stock by a swage block, the method comprising: The round section bar (1) is placed between an upper swage block (2) and a lower swage block (3), the upper swage block (2) and the lower swage block (3) are rotated for 90 degrees according to three passes, the matching distance between the upper swage block (2) and the lower swage block (3) of each pass is equal, the round section bar is drawn out in a mode that the matching distance is equal to the theoretical drawing round section area of the round section bar (1), the equivalent drawing piece (4) with the cross section area equal to the theoretical drawing round section area of the round section bar (1) is obtained, and the matching distance between the upper swage block (2) and the lower swage block (3) of each pass is determined by adopting the following mode: the method comprises the steps of performing simulation by software to determine that the round section bar (1) rotates 90 degrees between each pass by using the upper swage block (2) and the lower swage block (3) according to three passes, wherein when the matching distance between the upper swage block (2) and the lower swage block (3) of each pass is equal, the matching distance between the upper swage block (2) and the lower swage block (3) is equal to a relation curve of the diameter of an equivalent drawing round section with the cross section area equal to the cross section area of a formed equivalent drawing piece (4); Finding out a point with the diameter of the equivalent drawing circular section equal to the diameter of the theoretical drawing circular section of the circular section bar (1) according to the relation curve, wherein the matching distance between the upper swage block (2) and the lower swage block (3) corresponding to the point is the matching distance between the upper swage block (2) and the lower swage block (3) of each pass during drawing.
2. A method of drawing round section bar stock as recited in claim 1 in which the relationship is simulated using deform software.
3. A method of drawing round section bar stock according to claim 1, characterized in that the upper anvil (2) and the lower anvil (3) are V-shaped.

Description

Method for drawing round section bar by using swage block Technical Field The invention relates to the technical field of drawing, in particular to a method for drawing round section bar by a swage block. Background Drawing is a free forging deformation mode which reduces the cross section of a blank and increases the length, and is widely used because the blank shape can be changed, the distribution of inclusions can be improved, and the defects of holes in the material can be forged. The traditional swage block is drawn out by setting the distance between the upper swage block and the lower swage block, and is repeatedly trimmed to be in a right circular shape at a small angle of 30 degrees/45 degrees after 90 degrees of rotation deformation. Disclosure of Invention The invention aims to provide a method for drawing round section bar by using a swage block, which can improve the efficiency of round section bar. The technical scheme adopted by the invention for solving the technical problems is that the method for drawing the round section bar by the swage block comprises the following steps: And placing the round section bar between an upper swage block and a lower swage block, and rotating by 90 degrees between each pass according to three passes, wherein the matching distance between the upper swage block and the lower swage block of each pass is equal to obtain an equivalent extension piece with the cross section area equal to the area of the theoretical extension round section of the round section bar. Further, the mating distance between the upper and lower anvils for each pass is determined as follows: The method comprises the steps of performing simulation by software to determine that the round section bar is drawn out by using the upper anvil and the lower anvil according to three passes, wherein the upper anvil and the lower anvil rotate by 90 degrees between each pass, and when the matching distance between the upper anvil and the lower anvil of each pass is equal, the matching distance between the upper anvil and the lower anvil is equal to a relation curve of the diameter of an equivalent drawn out round section with the cross section area equal to that of a formed equivalent drawn out member; And finding out a point with the diameter of the equivalent drawing circular section equal to the diameter of the theoretical drawing circular section of the circular section bar according to the relation curve, wherein the matching distance between the upper anvil and the lower anvil corresponding to the point is the matching distance between the upper anvil and the lower anvil of each pass during drawing. Further, the relation curve is simulated by deform software. Further, the upper and lower anvils are V-shaped anvils. The method for drawing the round section bar by the swage block has the advantages that drawing passes are reduced, the matching distance between the upper swage block and the lower swage block in each pass is equal, and the operation is convenient, so that the drawing efficiency is higher, the condition that a rough blank is at a higher temperature during drawing can be better ensured, the drawing deformation of the rough blank is facilitated, and the drawing forming quality can be improved. Drawings FIG. 1 is a schematic drawing of a round section bar drawing process of the present invention; FIG. 2 is a plot of the mating distance between the upper anvil and the lower anvil versus the diameter of an equivalent drawn circular cross section; Reference numerals: Round section bar 1, upper swage block 2, lower swage block 3, equivalent elongated member 4, first intermediate blank 11, second intermediate blank 12. Detailed Description The invention will be further described with reference to the drawings and examples. As shown in fig. 1, a method for drawing a round section bar by an anvil according to the present invention comprises: And placing the round section bar 1 between the upper swage block 2 and the lower swage block 3, and rotating by 90 degrees between each pass according to three passes, wherein the matching distances between the upper swage block 2 and the lower swage block 3 of each pass are equal, and the round section bar is drawn in an H mode, so that an equivalent drawing piece 4 with the cross section area equal to the area of the theoretical drawing round section of the round section bar is obtained. In the invention, one pass of drawing refers to that a bar is placed between an upper anvil 2 and a lower anvil 3, and the bar is extruded and drawn from one end to the other end of the bar by using the upper anvil 2 and the lower anvil 3 under the condition that the bar does not rotate around the axis of the bar. The method of the present invention will be specifically described with reference to fig. 1: firstly, a round section bar 1 is placed between an upper swage block 2 and a lower swage block 3, the matching distance between the upper swage block 2 and the lower