Tungsten wire cold drawing forming equipment based on coaxial different-diameter tower wheel set

Abstract

The present application relates to tungsten wire processing technical field, specifically, it relates to tungsten wire cold drawing forming equipment based on coaxial different diameter tower wheel group, it includes a pair of tower wheel group set on the machine table, the drawing die between two tower wheel groups and the driving mechanism for driving tower wheel group to do the rotary motion;The tower wheel group includes a plurality of different diameter coaxial stacking traction wheel;It also includes the radius adjusting mechanism and the induction mechanism, wherein, the radius adjusting mechanism is installed on at least one of the tower wheel group;By setting the radius adjusting mechanism and the induction mechanism, the automatic detection and dynamic compensation of the speed difference between two tower wheel groups are realized.When the speed of one side tower wheel deviates from the normal value due to long-term operation, the induction mechanism monitors the tension change of tungsten wire in real time, and controls the radius adjusting mechanism to change the working outer diameter of traction wheel accordingly, so as to adjust the linear velocity under the premise of constant angular velocity, so that the tension quickly returns to normal.

Description

Technical Field

[0001] This invention relates to the field of tungsten wire processing technology, and more specifically, to a tungsten wire cold drawing forming equipment based on a coaxial differential diameter toggle assembly. Background Technology

[0002] Tungsten wire core cold drawing is a precision diameter reduction process performed at room temperature. The principle involves first coating the surface of a tungsten wire with a layer of an alloy material (such as nickel or copper) that is softer and more ductile than tungsten, forming a composite core. Then, without heating, this alloy-coated tungsten wire is directly passed through a drawing die at room temperature. At this point, the outer alloy layer acts as a force transmission medium, evenly transferring the drawing force applied by the die to the internal tungsten core, causing the tungsten wire to reduce its diameter synchronously, thereby achieving the goal of drawing the tungsten wire thinner.

[0003] In traditional processes, this drawing mainly relies on linear traction equipment. The entire production line is arranged in a straight line. Each time the tungsten wire is drawn thinner through a die, an independent traction wheel pulls it downstream at a different speed. The equipment uses a complex electrical control system to precisely adjust the speed of each traction wheel, ensuring that the traction speed of each stage is precisely matched with the elongation of the tungsten wire after it has been drawn, thus guaranteeing synchronous transmission of tungsten wires of different thicknesses at each stage.

[0004] However, this approach has obvious drawbacks: first, it requires extremely high real-time performance and precision from the electronic control system; second, the multi-stage independent transmission units result in a complex system structure and a high failure rate.

[0005] To address the aforementioned issues, patent CN121289264A proposes a tower wheel integrated tungsten wire cold drawing device. Its core concept is to integrate all traction wheels into a pair of coaxial, different-diameter tower wheels. Each tower wheel has multiple steps with varying diameters, and they rotate as a whole at the same speed. By utilizing the changes in diameter steps, the device automatically adapts to the required traction speed for each pass in a purely mechanical manner.

[0006] However, while this patented solution reduces the number of motors and transmission systems, the two tow rollers still need to be connected by a transmission mechanism or driven by two separate motors. During long-term continuous operation, mechanical wear or slight differences in motor characteristics can inevitably lead to a speed difference between the two tow rollers. If one tow roller rotates faster or slower than the other, it will cause an imbalance in the tungsten filament tension, which can lead to filament slack or even breakage. Summary of the Invention

[0007] The purpose of this invention is to provide a tungsten wire cold drawing forming device based on coaxial differential diameter torsion wheel sets. By setting a diameter adjustment mechanism that can dynamically adjust the outer diameter and a sensing mechanism that monitors the tension of the tungsten wire in real time, the two work together to automatically change the working outer diameter of the traction wheel to compensate for the loss of linear velocity when abnormal tension is detected due to the difference in speed between the two torsion wheel sets. This solves the problem mentioned in the background art, namely, that after long-term operation, the two torsion wheel sets generate a speed difference due to mechanical wear or differences in motor characteristics, which leads to an imbalance in the tension of the tungsten wire, resulting in loosening or breakage.

[0008] To achieve the above objectives, the tungsten wire cold drawing forming equipment based on coaxial unequal diameter roller sets includes a pair of roller sets mounted on the machine base, a drawing die located between the two roller sets, and a drive mechanism for driving the roller sets to rotate; the roller sets include multiple coaxially stacked traction rollers of different diameters; it also includes a diameter adjustment mechanism and a sensing mechanism, wherein the diameter adjustment mechanism is installed on at least one of the roller sets;

[0009] The diameter adjustment mechanism includes a movable plate movably disposed on the outer periphery of the traction wheel, and a drive assembly for driving the movable plate to move. When the drive assembly causes the movable plate to move on the outer periphery of the traction wheel, the actual working outer diameter of the traction wheel is changed.

[0010] The sensing mechanism is used to monitor the tension of the tungsten wire during the wire drawing process. When the tension of the tungsten wire deviates from the preset normal value, the sensing mechanism sends a control signal to trigger the drive assembly to move the movable plate. The movable plate compensates for the speed difference between the two tower wheel sets by changing the actual working outer diameter of the traction wheel.

[0011] Based on this, the movable plates are arranged in a ring array on the limiting groove on the outer periphery of each traction wheel;

[0012] The inner wall of the movable plate is embedded with a magnet, which applies magnetic attraction to the outer surface of the limiting groove to overcome the centrifugal force on the movable plate.

[0013] The inner ring of the movable plate is provided with a straight rod, which slides into the cavity opened inside the second tower wheel assembly.

[0014] Based on this, the sensing mechanism includes a tension control component and a distance sensor, and the tension control component includes follower wheels set at the positions of each traction wheel;

[0015] Two follower wheels form a group, corresponding to one traction wheel. The two follower wheels in the same group are arranged one above the other. The tungsten wire passes between the two and is pressed into a bent state to establish initial tension.

[0016] Multiple follower wheels are rotatably connected to a sliding seat, one end of which is slidably connected to a support via a guide rod; the support is fixed to the side wall of the base plate, and a connecting spring is provided between the support and the sliding seat to provide elastic restoring force;

[0017] The distance sensor is used to monitor the position data of the slider.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] In this tungsten wire cold drawing forming equipment based on coaxial differential diameter roller sets, an adjustment mechanism and a sensing mechanism are set up to realize automatic detection and dynamic compensation of the speed difference between the two roller sets. When the speed of one roller deviates from the normal value due to long-term operation, the sensing mechanism monitors the change in tungsten wire tension in real time and controls the adjustment mechanism to change the working outer diameter of the traction wheel accordingly, thereby adjusting the linear speed under the premise of constant angular velocity, so that the tension can be quickly restored to normal.

[0020] Furthermore, the sensing mechanism uses a follower wheel to press the tungsten wire into a bent state to detect tension. When the tension changes, the follower wheel first buffers and balances the tension fluctuation through its own displacement; subsequently, the diameter adjustment mechanism changes the working outer diameter of the traction wheel to restore the traction force to normal, and the follower wheel also resets, enabling it to perform tension balancing again. Through the coordinated operation of the diameter adjustment mechanism and the sensing mechanism, the follower wheel can perform repeated tension balancing multiple times without being affected by its own displacement travel limitations, thus ensuring that tension control remains sensitive and effective during long-term continuous drawing processes. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram showing the position of the wire drawing die of the present invention;

[0023] Figure 3 This is a schematic cross-sectional view of the first tractor assembly of the present invention;

[0024] Figure 4 This is a schematic diagram of the wire drawing die of the present invention;

[0025] Figure 5 This is a schematic diagram of the working state of the second turret assembly of the present invention;

[0026] Figure 6 This is a schematic diagram of the diameter adjustment mechanism of the present invention. Figure 1 ;

[0027] Figure 7 This is a schematic diagram of the working state of the adjusting mechanism of the present invention;

[0028] Figure 8 This is a schematic diagram of the diameter adjustment mechanism of the present invention. Figure 2 ;

[0029] Figure 9 This is a schematic diagram showing the position of the distance sensor of the present invention;

[0030] Figure 10 This is a schematic diagram of the sensing mechanism of the present invention;

[0031] Figure 11 This is a schematic diagram of the working state of the movable plate of the present invention.

[0032] The meanings of the labels in the diagram are as follows:

[0033] 100. Machine base; 101. Base plate; 102. Wire take-up assembly; 103. Drive mechanism; 110. First roller assembly; 111. Traction wheel; 112. Limiting groove; 113. Main shaft; 120. Second roller assembly; 121. Cavity; 130. Wire drawing die; 131. Module; 132. Die core; 133. Die frame; 134. Mounting groove; 140. Diameter adjustment mechanism; 141. Movable plate; 142. Straight rod; 143. Roller; 144. Conical block; 145. First cylinder; 146. Bracket; 147. Collar; 150. Sensing mechanism; 151. Sliding seat; 152. Follower wheel; 153. Support; 154. Connecting spring; 155. Guide wheel; 156. Mounting bracket; 157. Distance sensor. Detailed Implementation

[0034] The technical solutions in the embodiments 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.

[0035] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In the drawing process of tungsten wire, two techniques can be used: hot drawing and cold drawing. In the hot drawing process, graphite emulsion is uniformly coated onto the surface of the tungsten wire as a lubricant before drawing. The wire is then heated to 900–1200℃ to bring it into a plastic state before drawing. In the cold drawing process, a dense layer of soft metal (such as copper or nickel) is deposited on the surface of the tungsten wire using an electrochemical method before drawing. This metal is softer and more ductile than tungsten, and can act as a force-transmitting medium at room temperature, driving the internal tungsten core to reduce its diameter synchronously.

[0038] After the above pretreatment is completed, the tungsten wire can be fed into the forming equipment for wire drawing. For example... Figure 1 As shown, the forming equipment includes a pair of roller sets mounted on the machine base 100, a wire drawing die 130 located between the two roller sets, and a drive mechanism 103 for driving the roller sets to rotate.

[0039] For ease of description, the two tractor sets will be referred to as the first tractor set 110 and the second tractor set 120, respectively. (Reference) Figure 2 The first roller assembly 110 is specifically installed at the left end of the base plate 101, while the second roller assembly 120 is installed at the right end of the base plate 101, which is fixedly mounted on the machine base 100. Similarly, the wire drawing die 130 is installed in the middle of the base plate 101, and its height corresponds to the top height of the second roller assembly 120.

[0040] The first cassette set 110 and the second cassette set 120 have the same structure. (Reference) Figure 3Taking the structure of the first tractor group 110 as an example, it is composed of multiple coaxial traction wheels 111 of different diameters stacked together. Each traction wheel 111 has a limiting groove 112 on its outer ring to prevent the tungsten wire from coming off the wheel surface. The tungsten wire is alternately wound between the traction wheels 111 of the first tractor group 110 and the second tractor group 120. The diameter of the traction wheel 111 increases sequentially from the end closest to the base plate 101 outwards: the end closest to the base plate 101 is a small-diameter traction wheel 111, used to wind coarse-gauge tungsten wire; the end farther from the base plate 101 is a large-diameter traction wheel 111, used to wind fine-gauge tungsten wire. The specific winding path is as follows: the tungsten wire starts from the smallest traction wheel 111 of the first pulley group 110, is led to the same smallest traction wheel 111 of the second pulley group 120, then returns to the next slightly larger traction wheel 111 of the first pulley group 110, and then winds to the corresponding slightly larger traction wheel 111 of the second pulley group 120... This alternating and progressive process continues until it is led out from the largest traction wheel 111 of the second pulley group 120, and finally wound onto the take-up assembly 102 to complete the winding.

[0041] In terms of drive, these traction wheels 111 are fixedly connected as a whole. A main shaft 113 is set at one end of the small-diameter traction wheel 111. The main shaft 113 rotates through the base plate 101 and is connected to the drive mechanism 103, thereby driving the entire first tower wheel group 110 to rotate.

[0042] like Figure 4 As shown, the wire drawing die 130 consists of multiple modules 131. A module 131 is positioned each time a tungsten wire passes through a traction wheel 111 of the same level on one side of the pulley and before transitioning to a larger traction wheel 111 on the next level of the pulley on the other side. The core 132 of these modules 131 gradually decreases in size as the diameter of the traction wheel 111 increases, achieving a step-by-step reduction in the diameter of the tungsten wire. All modules 131 are mounted on an inclined die frame 133, which has two mounting slots 134. Adjacent modules 131 are staggered within the two mounting slots 134. The inclination angle of the die frame 133 is designed to ensure that the height difference between adjacent wire drawing dies is consistent with the radius difference between adjacent traction wheels 111, ensuring smooth tungsten wire routing.

[0043] Because the tungsten wire is thinned and elongated after passing through module 131, when it transitions from the small-diameter traction wheel 111 to the large-diameter traction wheel 111 of the adjacent pulley, the circumference of the large traction wheel 111 is much larger than that of the small traction wheel 111. Therefore, the winding length of the tungsten wire on the large traction wheel 111 also increases synchronously. Crucially, the increase in length of the tungsten wire after it thins is precisely compensated by the increase in winding length between adjacent large and small traction wheels 111, thus maintaining stable tension and ensuring complete synchronization of transmission during multiple drawing processes.

[0044] like Figure 5As shown, let the radius of the traction wheel 111 with the thicker end wrapped around the first traction wheel set 110 be R1, and the radius of the traction wheel 111 with the thinner end wrapped around the second traction wheel set 120 be R2, where R1 < R2. When the first traction wheel set 110 and the second traction wheel set 120 rotate synchronously at the same speed, the traction linear velocity of the second traction wheel set 120 must be greater than that of the first traction wheel set 110. The difference in their traction amounts perfectly matches the elongation of the tungsten wire after it is stretched, thus achieving smooth and continuous wire drawing.

[0045] To avoid the problem of tungsten filament loosening or breaking, the present invention provides a diameter adjustment mechanism 140 and a sensing mechanism 150. The diameter adjustment mechanism 140 is installed on the first pulley set 110 and / or the second pulley set 120.

[0046] The diameter adjustment mechanism 140 includes a movable plate 141 movably disposed on the outer periphery of the traction wheel 111, and a drive assembly for driving the movable plate 141 to move. When the drive assembly drives the movable plate 141 to move on the outer periphery of the traction wheel 111, it can effectively change the actual working outer diameter of the traction wheel 111, thereby adjusting the linear velocity of the traction wheel 111 at this stage.

[0047] The sensing mechanism 150 is used to monitor the tension of the tungsten wire during the drawing process. Once the tungsten wire tension deviates from the normal range, the sensing mechanism 150 sends a control signal to trigger the drive assembly to move the movable plate 141, thereby changing the outer diameter of the traction wheel 111. This automatically compensates for the speed difference between the first roller set 110 and the second roller set 120 caused by long-term operation, allowing the tungsten wire tension to quickly return to the state required for normal wire drawing, ensuring the continuity and stability of the entire drawing process.

[0048] Specifically, refer to Figure 8 The movable plates 141 are arranged in a circular array on the limiting grooves 112 on the outer periphery of each traction wheel 111. The movable plates 141 have an overall arc-shaped structure. When their inner ring is in close contact with the outer ring of the limiting groove 112, the outer diameter of the corresponding traction wheel 111 is at its minimum. When the movable plates 141 move radially outward along the traction wheel 111, the actual working outer diameter of the traction wheel 111 increases accordingly. In the initial position design, the movable plates 141 are located in the middle of their own movement stroke. This allows them to move towards the center of the traction wheel 111 to reduce the diameter, or move away from the center to expand the diameter, thus achieving bidirectional adjustment.

[0049] Regarding sliding structures, such as Figure 6 As shown, the inner ring of the movable plate 141 is provided with a straight rod 142, which slides into the cavity 121 opened inside the second tractor wheel assembly 120. This structure effectively restricts the movement direction of the straight rod 142, so that the movable plate 141 can only slide precisely along the radial direction of the traction wheel 111.

[0050] To prevent the movable plate 141 from being automatically thrown outward due to the centrifugal force generated when the second tower wheel assembly 120 rotates, the present invention embeds a magnet in the inner wall of the movable plate 141. The magnet applies a magnetic attraction force to the outer surface of the limiting groove 112. When the conical block 144 does not push the movable plate 141, the magnetic attraction force overcomes the centrifugal force, preventing the movable plate 141 from moving outward.

[0051] Regarding the drive assembly, this invention employs a drive method using a conical block 144 in conjunction with a first cylinder 145. The conical block 144 can extend into the cavity 121 of the second cascade wheel assembly 120, synchronously driving all straight rods 142 through axial movement. (Reference) Figure 6 Specifically, when the movable plate 141 is attached to the outer periphery of the limiting groove 112, the ends of each straight rod 142 abut against the outer conical surface of the conical block 144; to reduce friction, rollers 143 are provided at the ends of the straight rods 142. Figure 7 As shown, when the first cylinder 145 pushes the conical block 144 into the cavity 121, the inclined outer surface of the conical block 144 simultaneously pushes all the rollers 143 and the straight rod 142 to move outward radially, thereby driving each movable plate 141 to expand outward synchronously, thereby realizing the adjustment of the outer diameter of the entire second tower wheel assembly 120.

[0052] In the mounting structure of the conical block 144, such as Figure 7 As shown, the tapered block 144 has a protruding cam shaft at the end away from the traction wheel 111, and a collar 147 is slidably sleeved on the outer periphery of the cam shaft. The collar 147 is fixedly connected to the base plate 101 through a bracket 146, and the first cylinder 145 is also fixed on the bracket 146 and disposed at the end of the tapered block 144 for driving the tapered block 144 to move axially.

[0053] refer to Figure 9 Let the thick end of the tungsten wire be wound on the first tractor set 110, and the thin end be wound on the second tractor set 120. When the rotational speed of the second tractor set 120 is lower than that of the first tractor set 110 for some reason, the tungsten wire at part A between the two tractors will become loose due to insufficient traction.

[0054] Once the sensing mechanism 150 detects the decrease in tension caused by the slack, it sends a control signal to drive the first cylinder 145 to move the conical block 144. Figure 7 and Figure 11 As shown, when the conical block 144 moves axially, its outer conical surface synchronously pushes all the straight rods 142 and the movable plate 141 outward, increasing the actual working outer diameter of the second tractor set 120. After the outer diameter increases, with the current rotational speed of the second tractor set 120 remaining unchanged, its linear velocity increases accordingly, the traction immediately increases, and the slack tungsten wire is quickly tightened. After the tension returns to normal, the sensing mechanism 150 controls the first cylinder 145 to stop applying force, and the conical block 144 remains in its current position.

[0055] Thus, although the rotational speed of the second pulley set 120 is reduced, by dynamically increasing its outer diameter, a higher traction linear speed is obtained at the same angular velocity, which effectively compensates for the loss of traction caused by the reduction in rotational speed, thereby maintaining the stability of tension during the drawing process.

[0056] refer to Figure 9 and Figure 10 The specific structure of the sensing mechanism 150 is as follows. The sensing mechanism 150 includes a tension control component, which is mainly composed of follower wheels 152 arranged corresponding to the positions of each traction wheel 111. Specifically, every two follower wheels 152 form a group, corresponding to one traction wheel 111. The two follower wheels 152 in the same group are arranged vertically, and a tungsten wire passes between them and is pressed into a bent state to establish initial tension.

[0057] Multiple follower wheels 152 are rotatably mounted on the top of the sliding seat 151. One end of the sliding seat 151 is slidably connected to the support 153 via a guide rod. The support 153 is fixed to the side wall of the base plate 101, and a connecting spring 154 is provided between the support 153 and the sliding seat 151 to provide elastic restoring force.

[0058] To prevent the angle of the tungsten filament from shifting during operation after bending, multiple guide wheels 155 are provided on both sides of each follower wheel 152. These guide wheels 155 are respectively arranged corresponding to the outer diameter position of the traction wheel 111 and are uniformly fixed on the mounting bracket 156, which is fixed to the side wall of the base plate 101.

[0059] refer to Figure 9 The tension control assembly consists of two sets: one for the upper tungsten wire and the other for the lower tungsten wire. When the speed of the second pulley set 120 decreases, the upper tungsten wire becomes slack at point A. At this time, the connecting spring 154 releases its elastic force, pushing the sliding seat 151 downward, which in turn moves the follower wheel 152 downward, tightening the slack upper tungsten wire again. Simultaneously, the lower tungsten wire is tightened due to the continuous traction of the first pulley set 110, and the lower sliding seat 151 is passively moved downward, releasing some of the excess tungsten wire and preventing it from breaking due to excessive tension.

[0060] This demonstrates that changes in tungsten wire tension are directly reflected in the displacement of the sliding seat 151. Based on this, the sensing mechanism 150 is also equipped with a distance sensor 157. The distance sensor 157 is mounted on the side wall of the substrate 101 and is located below the sliding seat 151. When the sliding seat 151 shifts due to tension changes, and the distance sensor 157 detects that its distance deviates from the preset normal value, it sends a control signal to the first cylinder 145. The first cylinder 145 then drives the conical block 144 to move, increasing the outer diameter of the second tow wheel assembly 120. When the outer diameter increases, the traction force recovers, the tungsten wire tension returns to normal, and the sliding seat 151 resets. After the distance sensor 157 detects that the distance has recovered, it immediately controls the first cylinder 145 to stop moving, and the conical block 144 locks in the current compensation position, thereby completing the automatic compensation for the speed difference between the two tow wheel assemblies.

[0061] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tungsten wire cold drawing forming device based on coaxial unequal diameter roller sets, comprising a pair of roller sets mounted on a machine base (100), a drawing die (130) located between the two roller sets, and a drive mechanism (103) for driving the roller sets to rotate; the roller sets include multiple coaxially stacked traction wheels (111) of different diameters; characterized in that, It also includes a diameter adjustment mechanism (140) and a sensing mechanism (150), wherein the diameter adjustment mechanism (140) is installed on at least one of the tow wheel sets; The diameter adjustment mechanism (140) includes a movable plate (141) movably disposed on the outer periphery of the traction wheel (111), and a drive assembly for driving the movable plate (141) to move. When the drive assembly drives the movable plate (141) to move on the outer periphery of the traction wheel (111), the actual working outer diameter of the traction wheel (111) is changed. The sensing mechanism (150) is used to monitor the tension state of the tungsten wire during the wire drawing process. When the tension of the tungsten wire deviates from the preset normal value, the sensing mechanism (150) sends a control signal to trigger the drive assembly to drive the movable plate (141) to move, so that the movable plate (141) can compensate for the speed difference between the two tower wheel groups by changing the actual working outer diameter of the traction wheel (111).

2. The tungsten wire cold drawing forming equipment based on coaxial differential diameter tower wheel assembly according to claim 1, characterized in that, The diameter of the traction wheel (111) on the tower wheel assembly increases sequentially from one end outwards. Multiple traction wheels (111) are fixedly connected to form a whole. The smallest diameter traction wheel (111) has a main shaft (113) at one end. The main shaft (113) rotates through the base plate (101) on the machine tool (100) and is connected to the drive mechanism (103).

3. The tungsten wire cold drawing forming equipment based on a coaxial differential diameter tower wheel assembly according to claim 1, characterized in that, The wire drawing die (130) includes multiple modules (131) mounted on a die frame (133), and the core (132) of each module (131) gradually shrinks as the diameter of the traction wheel (111) increases; The mold frame (133) is fixed on the base plate (101) of the machine tool (100).

4. The tungsten wire cold drawing forming equipment based on coaxial differential diameter tower wheel assembly according to claim 1, characterized in that, The movable plates (141) are arranged in a ring array on the limiting grooves (112) on the outer periphery of each traction wheel (111); The inner wall of the movable plate (141) is embedded with a magnet, which applies magnetic attraction to the outer surface of the limiting groove (112) to overcome the centrifugal force on the movable plate (141).

5. The tungsten wire cold drawing forming equipment based on a coaxial differential diameter tower wheel assembly according to claim 4, characterized in that, The inner ring of the movable plate (141) is provided with a straight rod (142), which slides into the cavity (121) opened inside the second tower wheel assembly (120).

6. The tungsten wire cold drawing forming equipment based on a coaxial differential diameter tower wheel assembly according to claim 5, characterized in that, The drive assembly includes a conical block (144) and a first cylinder (145) for driving the conical block (144) to move. The conical block (144) can extend into the cavity (121) of the second tower wheel assembly (120). When the movable plate (141) is attached to the outer periphery of the limiting groove (112), the ends of each straight rod (142) abut against the outer conical surface of the conical block (144).

7. The tungsten wire cold drawing forming equipment based on a coaxial differential diameter tower wheel assembly according to claim 6, characterized in that, The tapered block (144) has a protruding convex shaft at one end away from the traction wheel (111), and a collar (147) is slidably sleeved on the outer periphery of the convex shaft; the collar (147) is fixedly connected to the base plate (101) through a bracket (146); The first cylinder (145) is fixed on the bracket (146) and located at the end of the conical block (144).

8. The tungsten wire cold drawing forming equipment based on coaxial differential diameter tower wheel assembly according to claim 1, characterized in that, The sensing mechanism (150) includes a tension control component and a distance sensor (157). The tension control component includes follower wheels (152) arranged at the positions of each traction wheel (111). Each pair of follower wheels (152) forms a group, corresponding to a traction wheel (111). The two follower wheels (152) in the same group are arranged vertically, and the tungsten wire passes between them and is pressed into a bent state to establish initial tension. Multiple follower wheels (152) are rotatably connected to sliding seats (151). One end of the sliding seat (151) is slidably connected to the support (153) through a guide rod. The support (153) is fixed to the side wall of the base plate (101), and a connecting spring (154) is provided between the support (153) and the sliding seat (151) to provide elastic restoring force. The distance sensor (157) is used to monitor the position data of the slider (151).

9. The tungsten wire cold drawing forming equipment based on a coaxial differential diameter tower wheel assembly according to claim 8, characterized in that, Multiple guide wheels (155) are provided on both sides of the follower wheel (152). The guide wheels (155) are respectively arranged according to the outer diameter position of the traction wheel (111) and are uniformly fixed on the mounting frame (156). The mounting frame (156) is fixed on the side wall of the base plate (101).

10. The tungsten wire cold drawing forming equipment based on a coaxial differential diameter tower wheel assembly according to claim 8, characterized in that, The distance sensor (157) is mounted on the side wall of the substrate (101) and is located below the sliding seat (151); When the sliding seat (151) is displaced due to tension changes, the distance sensor (157) detects that its distance deviates from the preset normal value and sends a control signal to the first cylinder (145).

Images