LU500163B1

LU500163B1 - Wire material drawing force dynamic measurement system

Info

Publication number: LU500163B1
Application number: LU500163A
Authority: LU
Inventors: Zhang Xuebin; Wu Baoan; Huang Tao; Guo Xiuhua; Zhou Yanjun; Cao Jun; Lyu Changchun; Peng Xiaowen; Li Shaolin; Chen Dingbiao; Ding Yong; Song Kexing; Zhang Chaomin; Fang Cunli; Zhang Yanmin
Original assignee: Henan Youke Electronic Mat Co Ltd; Zhejiang Tony Electronic Co Ltd; Univ Henan Science & Tech
Priority date: 2021-03-09
Filing date: 2021-05-17
Publication date: 2022-01-21
Also published as: CN113020297B; CN113020297A

Abstract

The present invention provides a wire material drawing force dynamic measurement system. This invention achieves the real-time monitoring to the variation of the drawing force, which is conducive to control the drawing force of the wire material in real-time in the drawing process, to avoid the influence of too large or too small drawing force, to improve the mechanical properties and quality of wire drawing forming, and to master the dynamic change of actual drawing force of successive passes in wire drawing process, so as to analyze the performance change of metal wire in the forming process.

Description

BL-5246 LU500163

WIRE MATERIAL DRAWING FORCE DYNAMIC MEASUREMENT SYSTEM

FIELD OF TECHNOLOGY This invention relates to the technical field of wire forming, in particular to a wire material drawing force dynamic measurement system.

BACKGROUND ART The round wire material or flat wire material with small cross-section of steel, copper, aluminum and other metals and their alloys is an important kind of metal profile and usually formed by multi-step drawing to the alloy rod billet obtained through continuous casting. In the process of drawing, with the decrease of sizes of drawing dies, the sizes of wire material decrease continuously. With the deformation processing, the work hardening phenomenon of the material increases, and the deformation resistance of the wire material increases, which cause the drawing force to increase, and is easy to increase the risk of wire breakage. At the same time, the friction between the die and the wire material increases with the increase of the drawing force, which not only reduces the surface quality of the wire material, but also 1s not conducive to the accuracy and service life of the die. In order to reduce the deformation resistance, the intermediate annealing process usually needs to be added in the drawing process, but the annealing process is complex and the cost is high.

When drawing wire material, the drawing force is the basic parameter of drawing deformation, and the drawing force in the process is the necessary original data to formulate a reasonable drawing process regulation, which has an important impact on the quality of formed wire material. The drawing force suffered in the process of wire material 1

BL-5246 processing is not a fixed value, but waves in a certain range. At present, the LUS00163 drawing force is measured manually, which is not only inefficient, but also largely influenced by human factors.

Therefore, it’s required to provide an improved technical solution aiming at the aforesaid shortcomings in the prior art.

SUMMERY OF THE INVENTION The purpose of this invention is to provide a wire material drawing force dynamic measurement system, so as to solve or alleviate the problems existing in the aforesaid prior art.

In order to achieve the aforesaid purpose, the present invention provides a wire material drawing force dynamic measurement system, which is used for ultrasonic drawing of wire material, comprising a drawing device, a first fixed pulley, a second fixed pulley, a movable pulley, a drawing wheels, a weight and a laser rangefinder; the said first fixed pulley is located at one side of the outlet end of the said drawing device, the said second fixed pulley is close to the said drawing wheels, and the said first fixed pulley and the said second fixed pulley are symmetrically arranged on both sides of the said movable pulley; the said movable pulley 1s located below the said first fixed pulley and the said second fixed pulley and hanged on the said wire material between the said first fixed pulley and the said second fixed pulley; the said weight is fixedly connected to the said movable pulley and can move together with the said movable pulley along the up-down direction with the variation of the drawing force of the said wire material; the said laser rangefinder is located below the said weight and is used for real-time monitoring the position change of the said weight when it moves up and down; wherein, after penetrating into the inlet end of the said drawing device and penetrating out from the outlet end of the said drawing device and winding around the said first fixed pulley, the 2

BL-5246 said movable pulley and the said second fixed pulley in turn, the said wire LUS00163 material winds multiple circles on the said drawing wheels to draw the wire material to move by the said drawing wheels through the friction between the said drawing wheels and the said wire material.

Advantageous effects: In this invention, after penetrating into the inlet end of the drawing device and penetrating out from the outlet end of the drawing device and winding around the first fixed pulley, the movable pulley, the second fixed pulley in turn, the wire material winds on the drawing wheels. The wire material winds multiple circles on the drawing wheels to draw the wire material to move with the rotation of the drawing wheels through the friction between the drawing wheels and the wire material. Because the movable pulley is fixedly connected with a weight, the wire material is wound in the pulley groove of the movable pulley from the lower side of the movable pulley, and has a trend of downward movement under the action of gravity of the movable pulley and the weight. When the resultant force of the wire tensions (the wire tension equals the drawing force) on both sides of the movable pulley is balanced with the gravity of the movable pulley and the weight, the weight will hover motionless in the air; when the gravity of the movable pulley and the weight is greater than the resultant force of the wire tension, the weight will move downward along the up-down direction; when the gravity of the movable pulley and the weight 1s less than the resultant force of the wire tension, the weight will move upward along the up-down direction; the moving distance of the weight is monitored in real-time through the laser rangefinder , so as to determine the variation value of the weight’s position in real-time, and achieve the real-time monitoring to the variation of the drawing force, which is conducive to control the drawing force of the wire material in real- 3

BL-5246 time in the drawing process avoids the influence of too large or too small LUS00163 drawing force, improves the mechanical properties and quality of wire drawing forming, and masters the dynamic change of actual drawing force of successive passes in wire drawing process, so as to analyze the performance change of metal wire material in the forming process.

BRIEF DESCRIPTION OF THE DRAWING Fig.1 is a schematic diagram of the structure of a wire material drawing force dynamic measurement system provided by some examples of this invention; Fig.2 is a schematic diagram of the drawing force monitoring provided by some examples of this invention; Fig.3 1s a schematic diagram of the structure of a mold core provided by some examples of this invention.

DETAILED DESCRIPTION OF THE EMBODYMENTS As illustrated in Figs.1-3, this wire material drawing force dynamic measurement system 1s used for ultrasonic drawing of wire material, comprises: a drawing device 100, a first fixed pulley 201, a second fixed pulley 202, a movable pulley 400, a drawing wheels 500, a weight 600 and a laser rangefinder 700; the first fixed pulley 201 is located at one side of the outlet end of the drawing device 100, the second fixed pulley 202 is close to the drawing wheels 500, and the first fixed pulley 201 and the second fixed pulley 202 are symmetrically arranged on both sides of the movable pulley 400; the movable pulley 400 is located below the first fixed pulley 201 and the second fixed pulley 202 and hanged on the wire material between the first fixed pulley 201 and the second fixed pulley 202; the weight 600 1s fixedly connected to the movable pulley 400 and can move together with the movable pulley 400 along the up-down direction with the 4

BL-5246 change of the drawing force of the wire material; the laser rangefinder LUS00163 700 is located below the weight 600 and is used for real-time monitoring the position change of the weight 600 when it moves up and down; wherein, after penetrating into the inlet end of the drawing device 100 and penetrating out from the outlet end of the drawing device 100 and winding around the first fixed pulley 201, the movable pulley 400 and the second fixed pulley 202 in turn, the wire material winds multiple circles on the drawing wheels 500 to draw the wire material to move by the drawing wheels 500 through the friction between the drawing wheels 500 and the wire material.

After penetrating into the drawing device 100 from the inlet end of the drawing device 100 and penetrating out from the outlet end of the drawing device 100 and winding around the first fixed pulley 201, the movable pulley 400, the second fixed pulley 202 in turn, the wire material winds on the drawing wheels 500. The wire material winds multiple circles on the drawing wheels 500 to draw the wire material to move with the rotation of the drawing wheels 500 through the friction between the drawing wheels 500 and the wire material. Because the movable pulley 400 is fixedly connected with a weight 600, the wire material is wound in the groove of the movable pulley 400 from the lower side of the movable pulley 400, and has a trend of downward movement under the action of gravity (G) of the movable pulley 400 and the weight 600. When the resultant force of the wire tensions (the wire tension equals the drawing force) of the wire material on both sides of the movable pulley 200 is balanced with the gravity (G) of the movable pulley 400 and the weight 600, the weight 600 will hover motionless in the air; when the G is greater than the resultant force of the wire tension, the weight 600 will move downward along the up-down direction; when the G is less than the resultant force of the wire tension, the weight 600 will move upward along

BL-5246 the up-down direction; wherein, the relationship between the drawing force LUS00163 T and G is shown in the following formula (1); Wherein œ is the angle between the wire material when winding from the movable pulley 400 to the second fixed pulley 202 and the vertical direction; a is the distance between the second fixed pulley 202 and the movable pulley 400 in the horizontal direction, that is, half of the distance between the first fixed pulley 201 and the second fixed pulley 202; H is the difference in height between the second fixed pulley 202 and the movable pulley 400 in the vertical direction; H = Hrota — H4 — Hpetected> Hrotal 1S the distance between the second fixed pulley 202 and the laser rangefinder 700, H, is the distance between the movable pulley 400 and the weight 600, Hpetectea 1S the distance between the weight 600 and the laser rangefinder 700. Herein, after the second fixed pulley 202 and the laser rangefinder 600 are fixed, HTota] 1S a fixed value; after the weight 600 is fixedly connected with the movable pulley 400, H,1s a fixed value; Hpetecteq Can be acquired from real-time monitoring the position of the movable pulley 400 through the laser rangefinder 600.

Real-time monitoring of the position change of the weight 600 through the laser rangefinder 700 can determine whether the weight 600 moves or not in real-time, that is, the variation of the drawing force can be monitored in real-time, which is conducive to control the drawing force of the wire material in real-time in the drawing process, to avoid the influence of too large or too small drawing force, to improve the mechanical properties and quality of wire material drawing and forming, and to master the dynamic change of drawing force of wire material in the drawing process, and conducive to analyze the performance change of the wire 6

BL-5246 material in the wire material forming process, effectively improve the LUS00163 drawing quality of the wire material.

The drawing wheels 500 comprises: a drawing capstan 501 and a drawing driven wheel 502, the drawing capstan 501 and the drawing driven wheel 502 are wound by the wire material successively for multiple turns, and the drawing capstan 501 drives the drawing driven wheel 502 to rotate through the wire material, wherein the wire material is wound into the drawing driven wheel 502, and wound out from the drawing driven wheel 502 after multiple-turn winding successively between the drawing capstan 501 and the drawing driven wheel 502.

After passing around the second fixed pulley 202, the wire material is firstly wound on the drawing driven wheel 502, and then wound on the drawing capstan 501, and wound on the drawing driven wheel 502 again. After winding multiple turns between the drawing driven wheel 502 and the drawing capstan 501 successively, the wire material is wound out from the drawing driven wheel 502. Thereby, through winding on the drawing capstan 501 and the drawing driven wheel 502, the wire material can effectively avoid the possible slippage when the wire material is drawn by using the static friction force between the wire material and the drawing capstan 501, and between the wire material and the drawing driven wheel

502.

Through the friction force between the wire material and the drawing capstan 501, the drawing driven wheel 502, the drawing capstan 501 drives the drawing driven wheel 502 to rotate, wherein the diameter of the drawing driven wheel 502 is larger than the diameter of the drawing capstan 501. By controlling the rotation speed of the drawing capstan 501, the controlling to the moving speed of the wire material in the drawing device 100 is achieved to avoid the possibility of breaking the wire material by excessive speed, effectively improve the quality of products in the wire 7

BL-5246 material drawing. LUs00163 In some alternative examples, the exterior side of the drawing wheels 500 1s made of rubber or resin material. Therefore, when the wire material is wound on the drawing wheels 500, the wire material is effectively protected to avoid the damage to the wire material when the drawing wheels 500 contacts the wire material. At the same time, the friction force between the wire material and the drawing wheels 500 can be effectively increased, the possible slippage between the drawing force and the wire material is avoided, and the transmission efficiency of the force between the drawing wheels 500 and the wire material is improved. Furthermore, the mechanism and material of the first fixed pulley 201, the movable pulley 400, and the second fixed pulley 202 can be same as the steel rope and pulleys. By doing this, the design cost for processing can be effectively reduced.

In some alternative examples, the wire material drawing force dynamic measurement system also comprises: a control unit 800, which is communicatively connected with the laser rangefinder 700 and electrically connected with the drawing wheels 500. The control unit 800 is used to receive the position variation of the weight 600 monitored by the laser rangefinder 700, and makes the judgment on whether the real-time drawing force on the wire material exceeds the preset threshold according to the received position variation of the weight 600, so as to control the start and stop of the drawing wheels 500.

The control unit 800 is electrically connected with the driving unit of the drawing wheels 500, and achieves the control to the drawing force through sending control instructions to the driving unit. The laser rangefinder 700 determines the distance between the weight 600 and the laser rangefinder 700 ( Hpetecteq) through the monitored position variation of the weight 600, and sends Hpetected to the control unit 800 in real-time.

BL-5246 The control unit 800 determines the change of difference H in height 0500163 between the second fixed pulley 202 and the movable pulley 400 in the vertical direction according to the received Hpetecteq, further determines the drawing force on the wire material in real-time, and compares the real- time drawing force on the wire material with the preset threshold value of the drawing force in the control unit 800. When the real-time drawing force on the wire material exceeds the preset threshold of drawing force, the driving unite of the control unit 800 for controlling the drawing force stops to work, so as to stop the rotation of the drawing wheel, prevent the wire material from being broken, and ensure the continuity of wire material drawing.

In some alternative examples, the wire material drawing force dynamic measurement system also comprises: a stand 300 and an adjusting device 900, the stand 300 is fixedly mounted with the drawing device 100, the first fixed pulley 201, the second fixed pulley 202 and the drawing wheels 500, and 1s rotatably mounted with the adjusting device 900; the adjusting device 900 comprises: a rotating rest 902 and an adjusting wheel 901, the adjusting wheel 901 1s located at the right downward of the drawing wheels 500, and is rotatably mounted on the stand 300 through the rotating rest 902, wherein, one end of the rotating rest 902 is rotatably mounted on the stand 300, another end of the rotating rest 902 is rotatably mounted with the adjusting wheel 901, and the adjusting wheel 901 can rotate around the axis of the connecting part of the rotating rest 902 and the stand 300.

A third fixed pulley 203 is also provided on the side where the wire material enters the drawing device 100, and the wire material enters the drawing device 100 after winding on the third fixed pulley 203. By doing this, the wire material is guided through the third fixed pulley 203 when entering the drawing die 102, which achieves the correcting to the travel 9

BL-5246 path of the wire material and effectively improves the drawing effect of the LUS00163 wire material in the drawing die 102.

In the example of this invention, the first fixed pulley 201, the second fixed pulley 202, the third fixed pulley 203 are all mounted on the stand 300 and locates at the same horizontal line, and horizontally corresponding to the inlet end and the outlet end of the drawing device 100. Therefore, it 1s not only convenient for mounting and positioning the first fixed pulley 201, the second fixed pulley 202, the third fixed pulley 203 and the drawing device 100, but also more convenient for controlling the wire material drawing.

The adjusting wheel 901 is located between the drawing wheels 500 and the third fixed pulley 203 of the next pass. The wire 1s wound out by the drawing wheels 500 and wound on the third fixed pulley 203 of the next pass after passing through the adjusting wheel 901, and enters into the drawing device 100 of the next pass. Since the adjusting wheel 901 is rotatably mounted on the stand 300 through the rotating rest 902. Thus, when the drawing forces between the adjacent two passes are inconsistent, the wire material between the adjacent two passes can be tensioned or relaxed by the action of the adjusting wheel 901, so as to achieve the adjustment of the different travel speed of the wire material between the two adjacent passes and to avoid the wire material breakage in drawing and to ensure the continuity of the wire material.

An angular displacement sensor is installed on the rotating rest 902 to monitor the rotation angle of the rotating rest in real-time. When the drawing forces between two adjacent passes are inconsistent, the difference of the drawing forces between two adjacent passes can be calculated according to the rotation angle of the rotating rest 902 monitored by the angular displacement sensor.

The adjusting wheel 901 is located at the right downward of the

BL-5246 drawing wheels 500, which is not only conducive to the winding of the LUS00163 wire material to make the structural arrangement of the wire material drawing force dynamic measurement system more compact; at the same time, but also conducive to the adjustment of the different travel speeds of the wire material between two adjacent passes through the adjusting wheel

901.

In some alternative examples, the drawing device 100 comprises: an ultrasonic unit 101, a drawing die 102 and a floating support 103; the ultrasonic unit 101 1s located at the exterior side of the drawing die 102 and 1s used to provide ultrasonic vibration energy transmitted along the radial direction of the drawing die 102; along the axial direction of the drawing die 102, one end of the drawing die 102 is fixedly connected with the ultrasonic unit 101, another end of the drawing die 102 elastically constrains the drawing die 102 by the floating support 103; the floating support 103 comprises a fixing part 113 and a compression spring 123, the compression spring 123 is located between the fixing part 113 and the end of the drawing die 102, and the space distance between the fixing part 113 and the drawing die 102 is adjustable, thus the spring pretension force of the elastically constrain to the drawing die 102 in the axial direction through the compression spring 123 is adjusted.

The ultrasonic unit 101 is located at the exterior side of the drawing die 102 and provides ultrasonic vibration energy transmitted along the radial direction of the drawing die 102. The ultrasonic vibration energy causes the vibration of the drawing die 102 and wire material, so as to achieve the ultrasonic drawing to the wire material.

Along the axial direction of the drawing die 102, the right end surface of the drawing die 102 is rigidly and fixedly connected with the ultrasonic unit 101, and the right end surface of the drawing die 102 is constrained and limited by the ultrasonic unit 101; the left end surface of the drawing 11

BL-5246 die 102 is elastically constrained by the floating support 103, so as to make LUS00163 the drawing die 102 float in the axial direction, and further control the amplitude of vibration of the drawing die 102 and the wire material after the ultrasonic vibration of the ultrasonic unit 101 transmites to the drawing die 102, achieving the efficiency control of ultrasonic drawing to the wire material.

The fixing part 113 of the floating support 103 is slidably connected on the stand 300, the two ends of the compression spring 123 abut with the fixing part 113 and the left end surface of the drawing die 102 respectively, the spring pretension force of the compression spring 123 in the axial direction is adjusted through the movement of the fixing part 113, to achieve the adjustment to the strength of the elastic constraint to the drawing die 102 in the axial direction. When the fixing part 113 moves to right and squeezes the compression spring 123, the spring pretension force of the compression spring 123 to the drawing die 102 increases, and the strength of the axial elastic constraint of the drawing die 102 increases, so that after the ultrasonic vibration energy of the ultrasonic unit 101 is transmitted to the drawing die 102, the amplitude of vibration of the drawing die 102 and the wire material decreases, and the efficiency of the ultrasonic drawing of the wire material decreases; when the fixing part 113 moves to left and releases the compression spring 123, the spring pretension force of the compression spring 123 to the drawing die 102 decreases, and the strength of the axial elastic constraint of the drawing die 102 decreases, so that after the ultrasonic vibration energy of the ultrasonic unit 101 1s transmitted to the drawing die 102, the amplitude of vibration of the drawing die 102 and the wire material increases, and the efficiency of the ultrasonic drawing of the wire material increases.

In a specific application scenario, the ultrasonic unit 101 comprises: an ultrasonic generator 111 and a mold frame 121, the ultrasonic generator 12

BL-5246 111 is fixedly mounted on the stand 300, the mold frame 121 is fixedly LUs00163 mounted on the ultrasonic generator 111, the drawing die 102 is installed inside of the mold frame 121, the ultrasonic amplitude transformer of the ultrasonic generator 111 abuts with the drawing die 102, so as to transmit the ultrasonic vibration energy to the drawing die 102.

A mounting groove is provided on the mold frame 121 in the axial direction, the drawing die 102 1s embedded in the mounting groove along the axial direction, the right end surface of the drawing die 102 contacts to the bottom surface of the mounting groove, and the outer surface of the drawing die 102 is matched with the inner wall of the mounting groove; a wire through hole is provided on the bottom surface of the mounting groove for the wire material to pass through; the side wall of the mold frame 121 is provided with a vibration through hole along the radial direction, the ultrasonic amplitude transformer passes through the vibration through hole and connects to the drawing die 102.

In a specific example, there are multiple floating supports 103, which are evenly distributed along the circumferential direction of the drawing die 102. Therefore, it effectively avoids the affection to the drawing of the wire material through the possible eccentricity load when the floating supports 103 elastically constrain the left end surface of the drawing die 102, so as to make the spring pretension force always transmit along the axial direction of the drawing die 102.

In another specific example, along the axis direction of the drawing die 102, a die hole is provided on the drawing die 102. The die hole 1s provided with an inlet zone 122A, a lubrication zone 122B, a compression zone 122C, a sizing zone 122D and an outlet zone 122E successively along the axial direction, and the inlet zone 122A, lubrication zone 122B, compression zone 122C and outlet zone 122E are all conical shapes with big exterior and small interior, the sizing zone 122D is a cylinder with the 13

BL-5246 same preset diameter as the wire material; wherein the wire material enters LUS00163 the drawing die 102 from the inlet zone 122A, and gets lubricated by the continuous sprayed lubricant in the lubrication zone 122B, and gets vibration drawn by ultrasonic vibration energy in the compression zone 122C and then winds on the first fixed pulley 201 through the sizing zone 122D, outlet zone 122E after converting into the preset diameter.

The small end of the cone(conical shape) in the inlet zone 122A is connected with the large end of the cone in the lubrication zone 122B, the small end of the cone in the lubrication zone 122B is the large end of the cone in the compression zone 122C, the small end of the cone in the compression zone 122C is connected with the left end of cylinder in the sizing zone 122D with the same diameter, and the right end of the cylinder in the sizing zone 122D is connected with the small end of the cone in the outlet zone 122E.

The external connected spray gun or external connected spray irrigation 1s used to continuously spray lubricant to the lubrication zone 122B to lubricate the surface of wire material. The friction between the wire material and the drawing die 102 can be effectively reduced after the wire material is lubricated by the continuously sprayed lubricant in the lubrication zone 122B, so as to avoid the wire material breakage caused by excessive friction, and effectively improve the surface quality of the wire material after forming at the same time.

The wire material enters the compression zone 122C after being lubricated in the lubrication zone 122B and performs vibration by ultrasonic vibration energy in the compression zone 122C, and is squeezed(extruded) by the drawing die 102. The wire material moves by the traction of drawing wheels 500 to make the diameter of the wire material decrease until being changed to the preset diameter. The wire material is shaped in the sizing zone 122D to ensure the size of the wire 14

BL-5246 material is the final preset diameter. In addition, the wire material can be LUs00163 also effectively improved with the flatness, dimensional accuracy and surface roughness in the sizing zone 122D, so as to obtain the wire material with stable shape, accurate dimension and good surface quality.

In a specific application scenario, along the axis direction of the drawing die 102, the taper angles of the conical shapes decrease gradually in the inlet zone 122A, the lubrication zone 122B and the compression zone 122C. In this way, it’s convenient for the wire material entering and leaving the drawing die 102, and effective control the wire material to enter the lubrication zone 122B and the compression zone 122C at the same time, so as to improve the ultrasonic drawing effect of wire material.

In another specific example, the drawing die 102 comprises: a mold body 112 and a mold core 122, the outer side wall of the drawing die 102 is fixedly connected to the ultrasonic unit 101, the mold core 122 is detachably mounted in the mold body 112 along the axial direction of the mold body 112, and is located between the outlet end of the drawing die 102 and the inlet end of the drawing die 102.

In the example of this invention, the mold core 122 is mounted in the mold body 112 along the axial direction, the mold body 112 is provided with a conical mounting hole, the outer surface of the mold core 122 is also conical, and the cone of the outer surface of the mold core 122 is matched with the conical mounting hole of the mold body 112. Therefore, the mold core 122 is mounted in the mold body 112 through the mutually press of the outer surface of the mold core 122 and the conical mounting hole. Wherein, the radial dimension of conical mounting hole is gradually decreases along the traveling direction of the wire material.

Both left and right ends of the mold body 112 are provided with mounting tapered holes, and the mounting tapered holes at the left and right ends are respectively located on both sides of the conical mounting hole;

BL-5246 wherein, the mounting tapered hole in the left end is used for mounting the LUS00163 mold core 122 in the conical mounting hole, the mounting tapered hole in the right end is used for withdrawing the mold core 122 from the conical mounting hole, so as to replace the mold core 122. Furthermore, the inlet zone 122A, lubrication zone 122B, compression zone 122C, sizing zone 122D and outlet zone 122E are respectively provided along the axial direction of the mold core 122; the large end opening of the inlet zone 122A 1s connected with the small end of the mounting tapered hole at the left end, the large end opening of the outlet zone 122E 1s connected with the small end of the mounting tapered hole at the right end.

At the left end of the mold core 122, from outside to inside, the taper angle of the inlet zone 122A is 70°, the taper angle y of the lubrication zone 122B is 35°, the taper angle & of the compression zone 122C is 20°, and at the right end of the mold core 122, from outside to inside, the taper angle 6 of the outlet zone 122E is 60°. Therefore, by designing the taper angle of the compression zone 122C as 20°, the amount and distribution of the pressure of the compression zone 122C acting on the wire material and the drawing force of the wire material can be effectively controlled, so as to improve the drawing deformation effect of the wire material.

The taper angle of the compression zone 122C is designed as 20°, which can effectively control the deformation rate of wire material drawing and effectively avoid the significant amounts of heat produced by the wire material through a too large taper and too small deformation zone or a too small taper and too large deformation zone, as well as the failure of the lubricant caused by overheat. When the taper angle is excessively large in the compression zone 122C, the deformation rate of the wire material increases, the wire material is closer to the sizing zone 122D in distance when drawing, and difficult to get the specified dimension when entering the sizing zone 122D, which makes the surface of the wire material form 16

BL-5246 concave-convex and affects the drawing quality of the wire material, when LUS00163 the taper angle is excessively small in the compression zone 122C, the contact point of the wire material is tightly adhered to the top of the compression zone , and the deformation area of the wire material is excessively large, which leads to the increase of the invalid power of the compression zone 122C and generates the significant amounts of heat. At the same time, the excessively small taper angle at the compression zone 122C will reduce the zone area of the lubrication zone 122B, the lubrication amount will also decrease after that, the lubrication function will decrease, the drawing force will increase, and the diameter of the sizing zone 122D will be larger, so as to make the wire material easy to appear ellipse phenomenon, which leads to easily breakage and shrinkage of the wire material.

The longer the length of the sizing zone 122D is, the larger the contact area between the wire material and the mold core 122 will be, and the friction 1s largely increased. Therefore, longer the length of the sizing zone 122D is, the larger drawing force is required. Only when the drawing force is greater than the tensile strength limit of the wire material, can the drawing process of the wire material be carried out, otherwise it will cause the wire material breakage and the drawing will not be carried out. Therefore, it’s required to set the proper length of the sizing zone 122D according to different grades of wire material.

The length of the sizing zone 122D of the wire material is set according to the different grade of wire material, and flat and straight are required. A too short length of the sizing zone 122D is difficult to obtain the wire material with stable shape, accurate dimension and good surface quality, and inevitably leads to the rapid wear of the mold core 122 at the same time.

17

Claims

BL-5246 CLAIMS: LU500163

1.A wire material drawing force dynamic measurement system, which is used for ultrasonic drawing of wire material, characterized by comprising: a drawing device, a first fixed pulley, a second fixed pulley, a movable pulley, a drawing wheels, a weight and a laser rangefinder; wherein the said first fixed pulley is located at one side of the outlet end of the said drawing device, the said second fixed pulley 1s close to the said drawing wheels, and the said first fixed pulley and the said second fixed pulley are symmetrically arranged on both sides of the said movable pulley; the said movable pulley 1s located below the said first fixed pulley and the said second fixed pulley and hanged on the said wire material between the said first fixed pulley and the said second fixed pulley; the said weight 1s fixedly connected to the said movable pulley and can move together with the said movable pulley along the up-down direction with the variation of the drawing force of the said wire material; the said laser rangefinder 1s located below the said weight and 1s used for real-time monitoring the position change of the said weight when moving up and down: wherein, after penetrating into the inlet end of the said drawing device and penetrating out from the outlet end of the said drawing device and winding around the said first fixed pulley, the said movable pulley and the said second fixed pulley in turn, the said wire material winds multiple circles on the said drawing wheels to draw the wire material to move by the said drawing wheels through the friction between the said drawing wheels and the said wire material;

2.The said wire material drawing force dynamic measurement system according to claim 1, characterized in that, the said drawing wheels comprises: a drawing capstan and a drawing driven wheel, the said drawing 18

BL-5246 capstan and the said drawing driven wheel are wound by the said wire LUS00163 material successively for multiple turns, and the said drawing capstan drives the said drawing driven wheel to rotate through the said wire material, wherein the said wire material is wound into the said drawing driven wheel, and wound out from the said drawing driven wheel after winding multiple times successively between the said drawing capstan and the said drawing driven wheel;

3.The said wire material drawing force dynamic measurement system according to claim 1, characterized in that the exterior side of the said drawing wheel is made of rubber or resin material;

4 The said wire material drawing force dynamic measurement system according to claim 1, characterized in that the said wire material drawing force dynamic measurement system further comprises: a control unit communicatively connected with the said laser rangefinder and electrically connected with the said drawing wheels, wherein the said control unit is used to receive the position variation of the said weight monitored by the said laser rangefinder, and to determine the real-time drawing force on the said wire material according to the received position variation of the said weight, and to make a judgment on whether the real-time drawing force of the said wire material exceeds the preset threshold, so as to control the start and stop of the said drawing wheels; and the said wire material drawing force dynamic measurement system further comprises: a display unit electrically connected to the control unit for real-time display of the wire drawing force in real time.

5.The said wire material drawing force dynamic measurement system according to claim 1, characterized in that, the said wire material drawing force dynamic measurement system further comprises: a stand and an adjusting device, the said stand is fixedly mounted with the said drawing device, the 19

BL-5246 said first fixed pulley, the said second fixed pulley and the said drawing LUS00163 wheels, and is rotatably mounted with the said adjusting device; the said adjusting device comprises: a rotating rest and an adjusting wheel, the said adjusting wheel is located at the right downward of the said drawing wheels, and is rotatably mounted on the said stand through the rotating rest, wherein one end of the said rotating rest is rotatably mounted on the said stand, another end of the said rotating rest is rotatably mounted with the said adjusting wheel, and the said adjusting wheel rotates around the axis of the connecting part of the said rotating rest and the said stand.

6.The said wire material drawing force dynamic measurement system according to any one of claims 1-5, characterized in that, the said drawing device comprises: an ultrasonic unit, a drawing die and a floating support; the said ultrasonic unit is located at the exterior side of the said drawing die and is used to provide the said drawing die with ultrasonic vibration energy transmitted along the radial direction of the said drawing die; along the axial direction of the said drawing die, one end of the said drawing die is fixedly connected with the said ultrasonic unit, another end of the said drawing die elastically constrains the said drawing die by the said floating support; the said floating support comprises a fixing part and a compression spring, the said compression spring is located between the said fixing part and the end of the said drawing die, and the space distance between the said fixing part and the said drawing die 1s adjustable, thus the spring pretension force of the elastically constrain to the said drawing die in the axial direction through the said compression spring is adjusted;

7.The said wire material drawing force dynamic measurement system according to claim 6, characterized in that there are multiple said floating supports evenly distributed along the circumferential direction of the said

BL-5246 drawing die. LUs00163

8.The said wire material drawing force dynamic measurement system according to claim 6, characterized in that, along the axis direction of the said drawing die, a die hole is provided on the said drawing die, the die hole is provided with an inlet zone, a lubrication zone, a compression zone, a sizing zone and an outlet zone successively along the axial direction, the said inlet zone, the said lubrication zone, the said compression zone and the said outlet zone are all conical shapes with big exterior and small interior, the said sizing zone is a cylinder with the same preset diameter as the said wire material; wherein the said wire material enters the said drawing die from the said inlet zone, and gets lubricated by the continuous sprayed lubricant in the said lubrication zone, and gets drawn by the said ultrasonic vibration energy in the said compression zone and then winds on the said first fixed pulley through the said sizing zone, the said outlet zone after being converted into the preset diameter.

9.The said wire material drawing force dynamic measurement system according to claim 8, characterized in that, along the axis direction of the said drawing die, the taper angles of the conical shapes decrease gradually in the said inlet zone, the said lubrication zone and the said compression zone.

10. The said wire material drawing force dynamic measurement system according to claim 6, characterized in that the said drawing die comprises: a mold body and a mold core, the outer side wall of the said mold body is fixedly connected to the said ultrasonic unit, the said mold core is detachably mounted in the said mold body along the axial direction of the said mold body, and is located between the outlet end of the said drawing die and the inlet end of the said drawing die.

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