CN218532345U - Device for regulating and controlling strength and toughness of metal material with large length-diameter ratio - Google Patents

Abstract

The utility model discloses a device for regulating the toughness of a metal material with a large length-to-diameter ratio. The device includes a wire feeding wheel, a wire drawing die, and a drawing torsion device arranged in sequence from left to right; the drawing and torsion device includes a rotating drum And the drawing wheel fixed on its surface through the bracket, the axis of the drawing wheel is perpendicular to the axis of the drum, and the metal rod wire is drawn through the wire feeding wheel, the wire drawing die and the drawing wheel in turn and is generated when the drum rotates Torque to twist. The utility model realizes the drawing-twisting continuous processing of the rod wire material through the drawing and torsion device, improves the strength and toughness of the metal material, has simple operation process and high production efficiency.

Description

A device for regulating the toughness of metal materials with large aspect ratio

technical field

The utility model relates to metal material strengthening technology, in particular to a device for regulating the toughness of metal materials with large aspect ratio.

Background technique

Since the beginning of the 20th century, due to the continuous improvement of social productivity, the standard requirements for materials have also increased. Jinzhan materials are widely used in military and civilian fields due to their good comprehensive mechanical properties, and are indispensable materials for human society. Metal rods and wires are the product type with the largest consumption and the most fields involved in the profiles used, and its production technology level has a significant impact on the national economy. Mechanical properties are one of the key indicators for the performance of metal rods and wires, and are also the fundamental indicators for determining the quality of both the supply and demand sides, and therefore are also the key performance parameters for enterprise production control. The mechanical properties of rods and wires with large length-to-diameter ratio are closely related to materials and processing technology. Under the same conditions of the same material, differences in processing methods, procedures and parameters have a significant impact on material properties. Even with the same processing method, process and parameters, there may be differences in material properties due to a process parameter change or drift. The performance of traditional metal materials is basically determined after the processing process is completed. Heat treatment is one of the few treatment methods without changing the specification and shape, but its performance control is very limited. For this reason, the annual waste of material due to substandard performance is enormous. In addition, due to the traditional processing of materials with a large aspect ratio, whether it is extrusion, rolling, drawing, etc., the axial fiber structure is basically formed, and the anisotropy of the material is serious because the fiber orientation is single. The team of Sun Yuanjun of Xi'an Jiaotong University proposed "a method of non-deformation processing, regulating the mechanical properties of metal tubes, rods and wires". In the case of different diameters, the strength and toughness of the material can be significantly adjusted.

The drawing material processing process will lead to significant work hardening of the metal, so multiple drawing is required, and the multiple press processing makes the metal material form a fiber structure along the axial direction. The existence of this structure significantly improves the axial performance of the material. However, the radial properties of the material are seriously weakened, forming a strong anisotropy. The existence of anisotropy will directly affect the strength performance of metal materials and restrict the use of this material. It can be seen that the core of adjusting the anisotropy of the rod wire material is to adjust the direction of the extrusion/rolling/drawing structure of the material. According to a large number of studies, the use of torsional deformation can change the fiber structure orientation of the material, significantly reduce the anisotropy of the material, and uniformly refine the micron grain size of the metal to the nanometer scale, so that the strength of the material can be significantly improved. For example, a method invented by Sun Yuanjun and Sun Boyu of Xi'an Jiaotong University to eliminate the anisotropy of pressure-processed metal pipes can be modified by twisting the pipes at high temperature and normal temperature. The team also invented a method of non-deformation processing to control the strength and toughness of metal rods and rods. By bending metal wires or rods at room temperature or high temperature and then straightening them, by controlling the bending curvature and the number of turns The grain orientation and grain size of the metal can be changed by the number of times, and the strength and toughness of the wire or rod can also be changed by adjusting the torsion process.

Based on the above reasons, it is urgent to provide a device or method capable of simultaneous continuous processing of drawing and twisting, so as to improve the strength and toughness of metal materials.

Contents of the invention

The purpose of the utility model is to provide a device for regulating the toughness of metal materials with large length-to-diameter ratio, which can realize continuous drawing-torsion processing of rod wire materials and improve the toughness of metal materials.

In order to achieve the above object, the utility model adopts the following technical solutions to achieve:

A device for regulating the strength and toughness of metal materials with a large aspect ratio, including a raw material tray, a wire feed wheel, a wire drawing die, and a drawing and twisting device arranged in sequence from left to right;

The drawing and twisting device includes a rotating drum and a wire drawing wheel fixed on its surface through a bracket. The axis of the wire drawing wheel is perpendicular to the axis of the rotating drum. The die and wire drawing wheel are drawn and twisted by the torque generated when the drum is turned.

Further, it also includes a wire pressing ring located between the wire drawing die and the drum, and the wire pressing ring and the drum are arranged coaxially.

Further, the drum is driven by a drive motor, which is a speed-regulating motor.

Further, the surface of the rotating drum is also fixedly installed with a receiving tray for receiving the drawn and twisted metal rod wire through the support.

The utility model has the following beneficial effects:

In the utility model, the wire drawing wheel is fixed on the surface of the rotating cylinder through the bracket. On the one hand, when the wire drawing wheel rotates around its own axis, the metal rod wire is pulled, so that the metal rod wire is drawn to form fibers along the axial direction. Second, when the drum rotates, the drawing wheel fixedly connected with it rotates together to generate torsion, and the metal rod wire in the process of being drawn is twisted to change the orientation of its fiber structure. It can be seen that the utility model cooperates the online drawing and torsion processing of the metal rod and wire material, realizes the drawing-torsion continuous processing of the rod and rod wire material, and makes the anisotropy of the rod and rod wire metal material with a large aspect ratio Significantly reduced, enhancing the strength and toughness of metal materials.

By installing a wire pressing ring between the wire drawing die and the drum, the metal rod wire with a smaller diameter after passing through the wire drawing die passes through the wire pressing ring first, effectively avoiding large vibration of the device during the drawing torsion process, and Affects the pull torsion effect.

The drum is driven by a speed-regulating motor, and the rotation speed and direction of the drum can be adjusted according to the anisotropy of rods and wires with different large length-to-diameter ratios and the characteristics of the processing process, so as to control the torsion of the metal rods and wires. Angle, torsion direction and rotation period, and then reasonably change the orientation of the fiber structure of the rod wire with a large aspect ratio, control the anisotropy of the material after wire drawing, refine the grain size of the metal, and finally adjust the interior of the metal material Texture to change the strength and toughness of materials.

The receiving tray can be used to store drawn and twisted metal rods and rods, which is more convenient for processing and operation.

Description of drawings

Fig. 1: overall structure schematic diagram of the utility model;

Fig. 2: a side view of the dotted line frame in Fig. 1 of the utility model;

In the figure: 1. Raw material tray; 2. Wire feeding wheel; 3. Drawing die; 4. Pressing ring; 5. Drawing wheel;

Detailed ways

The specific content of the present utility model will be further explained in detail below in conjunction with the embodiments, but not as a limitation of the present utility model.

As shown in Figures 1 and 2, a device for regulating the toughness of metal materials with a large aspect ratio includes a raw material tray 1, a wire feed wheel 2, a wire drawing die 3, a wire pressing ring 4 and A drawing and twisting device, the drawing and twisting device includes a rotating drum 8 and a wire drawing wheel 5 and a wire collection reel 6 fixedly installed on its surface through a bracket. Perpendicular to the axis of the rotating drum 8, the wire pressing ring 4 and the rotating drum 8 are coaxially arranged, and the pressing wire ring 4 can avoid the large vibration of the device during the drawing and twisting process;

The metal rod wire 7 in the raw material disk 1 is transported to the wire drawing die 3 by the wire feed wheel 2, and then the diameter becomes smaller, and then drawn by the traction force generated when the wire drawing wheel 5 rotates. At the same time, the rotation of the drum 8 will drive the wire drawing The axial rotation of the wheel 5 around the drum 8 generates torsion to the metal rod wire 7, thereby twisting the metal rod wire 7 during the drawing process, so that the metal rod wire 7 is formed during the drawing process. The orientation of the fiber structure along the axial direction is changed, the anisotropy of the material after wire drawing is adjusted, the grain size of the metal is refined, and the strength and toughness of the material are finally changed by adjusting the internal texture of the metal material.

Preferably, the drive motor of the drum 8 is a speed-regulating motor, which can adjust the rotation speed and direction of rotation of the drum according to the anisotropy of rods and wires with different large length-to-diameter ratios and the characteristics of the processing procedures. Control the torsion angle, torsion direction and rotation period of the metal rod wire, and then reasonably change the orientation of the fiber structure of the rod wire with a large aspect ratio.

The working principle of the utility model is as follows:

First, the metal rod wire 7 in the raw material disk 1 is transported to the wire drawing die 3 through the wire feed wheel 2 to make the diameter of the metal rod wire 7 smaller, and then the drum 8 is rotated to drive the wire drawing wheel 5 to rotate synchronously. The reduced metal rod wire 7 first passes through the pressing ring 4, and then is pulled out with the rotation of the drawing wheel 5 to form a fibrous tissue along the axial direction, and is twisted by the torsion generated when the drum 8 rotates. The orientation of the fiber structure is changed, and finally it is stored in the receiving tray 6, realizing the multi-pass drawing and torsion processing of the metal rod wire 7.

Claims (4)

1. A device for regulating and controlling the toughness of a metal material with a large length-diameter ratio is characterized by comprising a raw material disc (1), a wire feeding wheel (2), a wire drawing die (3) and a drawing and twisting device which are sequentially arranged from left to right;

the drawing and twisting device comprises a rotary drum (8) and a wire drawing wheel (5) fixedly arranged on the surface of the rotary drum through a support, the axis of the wire drawing wheel (5) is vertical to the axis of the rotary drum (8), and metal rod wires (7) wound on a raw material disc (1) sequentially pass through a wire feeding wheel (2), a wire drawing die (3) and the wire drawing wheel (5) to be drawn and twisted by torsion generated when the rotary drum (8) rotates.

2. The device for regulating and controlling the toughness of the metal material with the large length-diameter ratio according to the claim 1, characterized by further comprising a wire pressing ring (4) positioned between the wire drawing die (3) and the rotary drum (8), wherein the wire pressing ring (4) and the rotary drum (8) are coaxially arranged.

3. The device for regulating and controlling the toughness of the metal material with the large length-diameter ratio according to claim 2, wherein the rotary drum (8) is driven by a driving motor, and the driving motor is a speed regulating motor.

4. The device for regulating and controlling the toughness of the metal material with the large length-diameter ratio according to any one of claims 1 to 3, wherein a wire collecting disc (6) for collecting the metal rod wire material (7) after drawing and twisting is fixedly arranged on the surface of the rotary drum (8) through a support.

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