A wire drawing device

Abstract

The embodiment of the application discloses a wire drawing device, which comprises a wire drawing die, at least one variable-diameter hole for changing the wire diameter is arranged on the wire drawing die; a first traction wheel and a second traction wheel, the axes of the two are parallel and are respectively arranged on the wire inlet side and the wire outlet side of the wire drawing die, the first traction wheel and the second traction wheel are respectively provided with a first wire groove and a second wire groove corresponding to the variable-diameter hole; a plurality of separation wheels, the number of the separation wheels is equal to the number of the second wire grooves and the variable-diameter holes and the positions of the separation wheels correspond to the positions of the second wire grooves and the variable-diameter holes, a wire separation groove is arranged on the circumferential surface of each separation wheel, each wire separation groove is arranged on one side of the axial extension line of the corresponding variable-diameter hole, and the wire separation groove is used for receiving the wire from the corresponding second wire groove and guiding the wire to return to the corresponding second wire groove after being folded back. The embodiment of the application avoids the wire drawing breakage caused by the friction and cross-over of the wires in different layers in the same wire groove.

Description

Technical Field

[0001] This application relates to the field of wire drawing equipment technology, and specifically to a wire drawing device. Background Technology

[0002] Existing wire drawing devices typically include a traction wheel and a wire drawing die with a variable diameter hole. The diameter of the wire (such as copper wire, gold wire, etc.) decreases after passing through the variable diameter hole of the wire drawing die, and the traction wheel provides traction force to make the wire travel in a preset direction.

[0003] To ensure sufficient traction, the wire typically needs to be wound at least one and a half turns (i.e., more than 360 degrees) within the groove of the traction wheel. However, this winding method presents significant problems when the traction wheel is running at high speed: friction easily occurs between different winding layers (especially radially adjacent layers) within the same groove, and in severe cases, this can even lead to the wires of different layers crossing and overlapping. This phenomenon can easily cause the wire to break.

[0004] Therefore, it is urgent to solve the problem of mutual friction and cross-over of different coiled wires in the same groove of the same traction wheel during high-speed traction. Utility Model Content

[0005] This application aims to solve at least one technical problem existing in the prior art. Specifically, the embodiments of this application provide a wire drawing device to solve the problem of mutual friction and cross-over of different coiled wires in the same groove of the same traction wheel during high-speed traction in the prior art.

[0006] The objective of this application can be achieved through the following technical solutions: This application provides a wire drawing device, comprising: A wire drawing die, which has at least one diameter-changing hole for changing the wire diameter; The first traction wheel and the second traction wheel are parallel to each other and are respectively disposed on the wire inlet side and the wire outlet side of the wire drawing die. The first traction wheel and the second traction wheel are respectively provided with a first wire groove and a second wire groove that correspond one-to-one with the variable diameter hole. A number of dividing wheels, the number of which is equal to the number of the second wire groove and the variable diameter hole and their positions correspond one-to-one. Each dividing wheel has a dividing groove on its circumferential surface. Each dividing groove is located on one side of the axial extension line of its corresponding variable diameter hole. The dividing groove is used to receive the wire from the corresponding second wire groove and guide the wire to fold back and return to the corresponding second wire groove.

[0007] Optionally, both the first traction wheel and the second traction wheel are cam wheels. The first traction wheel has a plurality of first grooves arranged sequentially along its axial direction, and the diameter of each first groove gradually changes. The second traction wheel has a plurality of second grooves arranged sequentially along its axial direction, and the diameter of each second groove gradually changes.

[0008] Optionally, the wire drawing device further includes a guide wheel, which is disposed at the end of the second traction tower wheel and located on the side of the second wire groove away from the corresponding branch groove, for receiving and guiding the wire material of the second wire groove through the end to the subsequent equipment, and a guide groove is provided on the circumferential surface of the guide wheel.

[0009] Optionally, the inner wall of the dividing groove has a gradually narrowing slope from the groove opening to the bottom of the groove, forming a guide structure.

[0010] Optionally, the distance between the separator wheel and the second traction wheel can be adjusted along the direction from the second traction wheel to the first traction wheel.

[0011] Optionally, the inner diameter of the dividing groove is smaller than the inner diameter of the corresponding second groove.

[0012] Optionally, the central axis of the separator wheel is coplanar with the central axis of the first traction wheel and the central axis of the second traction wheel.

[0013] The above-described one or more embodiments of this application have at least one or more of the following beneficial effects: By using a dividing wheel to guide the wire back through the dividing groove, the winding method of the wire in the second groove is optimized, avoiding friction and cross-over of different layers of wire in the same groove, reducing additional stress on the wire, lowering the probability of wire breakage during high-speed traction, and improving the stability and continuity of the wire drawing process. Attached Figure Description

[0014] The present application will be further described below with reference to the accompanying drawings.

[0015] Figure 1 This is a perspective view of the wire drawing device in one embodiment of this application; Figure 2 This is a top view of the wire drawing device in one embodiment of this application.

[0016] Explanation of reference numerals in the attached figures: 1. Wire drawing die; 2. First traction wheel; 21. First wire groove; 3. Second traction wheel; 31. Second wire groove; 4. Separating wheel; 41. Separating groove; 5. Guide wheel; 51. Guide groove; 100. Wire material. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] Please see Figure 1 and Figure 2 As shown, in some embodiments, this application provides a wire drawing device, including a wire drawing die 1, a first traction wheel 2, a second traction wheel 3, and a plurality of dividing wheels 4.

[0019] The wire drawing die 1, as the core component for changing the diameter of the wire 100, has at least one through-hole (not shown) on it. The diameter of the hole gradually decreases along the direction of wire 100 travel to achieve wire stretching and diameter reduction. The axis of each through-hole remains straight to ensure that the wire 100 can pass through smoothly. When multiple through-holes are provided, they are spaced apart along an axis perpendicular to the through-holes, and the diameters of the through-holes gradually change sequentially.

[0020] The central axes of the first traction wheel 2 and the second traction wheel 3 are parallel to each other and are respectively arranged on the inlet and outlet sides of the wire drawing die 1, forming a traction path for the wire 100. The first traction wheel 2 has a plurality of first grooves 21 on its circumference, and the second traction wheel 3 has a plurality of second grooves 31 on its circumference. Both the first grooves 21 and the second grooves 31 are annular grooves. The number of the first grooves 21 and the second grooves 31 is the same as the number of the variable diameter holes, and their positions correspond one-to-one.

[0021] The number of dividing wheels 4 is the same as the number of second grooves 31 and variable diameter holes, and each dividing wheel 4 corresponds to one second groove 31 and one variable diameter hole. A dividing groove 41 is formed on the circumferential surface of each dividing wheel 4; the dividing groove 41 is also an annular groove. The dividing groove 41 is located on one side of the axial extension line of its corresponding variable diameter hole.

[0022] The wire 100 is drawn out from the first groove 21 of the first traction wheel 2, passes through the corresponding variable diameter hole on the drawing die 1 along the preset path, and then enters the second groove 31 corresponding to the second traction wheel 3; then, the wire 100 is drawn out from the second groove 31 and enters the dividing groove 41 of the corresponding dividing wheel 4, and is folded back under the guidance of the dividing groove 41, returning to the same second groove 31; then, the wire 100 is drawn out from the second groove 31 again and enters the next cycle of the stretching process.

[0023] The wire 100 is guided back by the dividing wheel 4 and the wire groove 41, which optimizes the winding method of the wire 100 in the second wire groove 31. This avoids friction and cross-over of different layers of wire 100 in the same wire groove, reduces additional stress on the wire 100, lowers the probability of wire breakage during high-speed traction, and improves the stability and continuity of the wire drawing process. This device is suitable for wire drawing operations of various types of wire 100, such as round wire, flat wire, and shaped wire.

[0024] In some embodiments, both the first traction wheel 2 and the second traction wheel 3 are tower wheels. The first traction wheel 2 is provided with a plurality of first grooves 21 arranged sequentially along its axial direction, and the diameter of each first groove 21 gradually changes. The second traction wheel 3 is provided with a plurality of second grooves 31 arranged sequentially along its axial direction, and the diameter of each second groove 31 gradually changes.

[0025] Because the first traction wheel 2 and the second traction wheel 3 are tower wheels with gradually changing groove diameters, after one stretching operation, the wire 100 is drawn out from a second groove 31 on the second traction wheel 3 and enters the next first groove 21 on the first traction wheel 2, which has a smaller diameter, to continue the next stretching operation. This structure allows the wire 100 to gradually reduce its diameter, forming a continuous traction and stretching path between the grooves, thus achieving multi-pass continuous stretching of the wire 100. Through the gradually changing groove diameters, the wire 100 can be sequentially transferred between grooves of different sizes, with each transfer performing a stretching and diameter reduction operation, eliminating the need for frequent traction wheel replacements and improving wire drawing efficiency.

[0026] In some embodiments, the inner wall of the dividing groove 41 on the dividing wheel 4 has a gradually narrowing slope from the groove opening to the groove bottom, that is, the width of the groove opening is greater than the width of the groove bottom, and the slope transitions smoothly, forming a funnel-shaped guide structure.

[0027] As the wire 100 is drawn out from the second groove 31 and moves towards the dividing groove 41, the tapering ramp of the dividing groove 41 guides the wire 100, allowing it to smoothly enter the dividing groove 41 and slide along the ramp to the bottom of the groove. Then, guided by the bottom of the groove, it turns back to the corresponding second groove 31. This improves the smoothness of the wire 100 entering the dividing groove 41. Even if the wire 100 deviates slightly when entering the dividing groove 41, the tapering ramp guides it into the groove, reducing the possibility of the wire 100 getting stuck at the entrance of the dividing groove 41. It also reduces wear on the wire 100 at the entrance of the dividing groove 41. The smooth ramp reduces the violent collisions and friction between the wire 100 and the inner wall of the dividing groove 41, protecting the surface quality of the wire 100.

[0028] In some embodiments, the distance between the separator wheel 4 and the second traction wheel 3 can be adjusted along the direction from the second traction wheel 3 to the first traction wheel 2 (i.e., the direction of wire feeding of the wire 100). This adjustment can be achieved by setting an adjustment mechanism (such as a slide rail, a lead screw and nut mechanism, etc.), for example, by mounting the separator wheel 4 on a sliding bracket and changing the distance between the separator wheel 4 and the second traction wheel 3 by adjusting the position of the bracket.

[0029] Adjusting the spacing does not change the correspondence between the separator wheel 4, the second groove 31, and the variable diameter hole; it only changes the relative position between the separator wheel 4 and the second traction wheel 3. The path length of the wire 100 from the second groove 31 to the dividing groove 41 will change with the spacing, but the overall direction of travel and connection of the wire 100 remains unchanged.

[0030] The distance between the separator wheel 4 and the second traction wheel 3 can be adjusted according to the requirements of the traction path length for different specifications and materials of the wire 100, so as to ensure that the tension of the wire 100 during the folding process is within a suitable range, thereby improving the device's ability to handle different wires 100.

[0031] In some embodiments, the inner diameter (i.e., the diameter of the bottom of the groove) of the dividing groove 41 on the dividing wheel 4 is smaller than the inner diameter (the diameter of the bottom of the groove) of the corresponding second groove 31.

[0032] After the wire 100 is led out from the second wire groove 31, it enters the wire dividing groove 41 with a smaller inner diameter. Since the inner diameter of the wire dividing groove 41 is smaller, it can exert a certain constraint on the wire 100, making the position of the wire 100 in the wire dividing groove 41 more stable.

[0033] In some embodiments, the central axis of the separator wheel 4 is in the same plane as the central axis of the first traction wheel 2 and the central axis of the second traction wheel 3. This coplanar arrangement ensures that the travel path of the wire 100 between the first traction wheel 2, the second traction wheel 3, and the separator wheel 4 is in the same plane, preventing the wire 100 from twisting or bending in three-dimensional space. The entire process of the wire 100—from being drawn out of the first traction wheel 2, passing through the drawing die 1, entering the second traction wheel 3, then to the separator wheel 4, and finally returning to the second traction wheel 3—maintains a smooth transition within this coplanar path, reducing the additional stress on the wire 100. If the central axes are not coplanar, the wire 100 will experience torsional stress, which can easily lead to fatigue fracture under long-term action. The coplanar arrangement ensures the natural bending of the wire 100, reduces additional stress, and improves the service life of the wire 100.

[0034] In some embodiments, the wire drawing device further includes a guide wheel 5, which is disposed at the end of the wire routing of the second traction tower wheel, specifically on the side of the second wire groove 31 opposite to the corresponding branch groove 41. A guide groove 51 is provided on the circumferential surface of the guide wheel 5, and the cross-sectional shape of the guide groove 51 is adapted to the cross-section of the wire 100 after multiple stretching, so as to stably accommodate the wire 100.

[0035] After the wire 100 passes through the second groove 31 at the end of the second traction wheel 3, it is led out from the second groove 31 and enters the guide groove 51 of the guide wheel 5. Under the guidance of the guide groove 51, the wire 100 is transported to the subsequent processing equipment (such as annealing equipment, take-up equipment, etc.), forming a connection path from the second traction wheel 3 to the subsequent equipment.

[0036] The guide groove 51 of the guide wheel 5 provides good guidance for the wire 100, avoiding deviation or shaking after the wire 100 is drawn out from the end of the second traction wheel 3, ensuring that the wire 100 can enter the subsequent equipment accurately and smoothly, and ensuring the continuity of the entire wire drawing process.

[0037] The application method of the wire drawing device is as follows: The wire 100 is drawn out from the preceding processing equipment (such as the wire feeding equipment), and after being wound once on the first wire groove 21 with the smallest diameter of the first traction wheel 2, the wire 100 is drawn out from the first wire groove 21 and passes through the variable diameter hole on the wire drawing die 1 corresponding to the first wire groove 21 along the preset path. During the process of passing through the variable diameter hole, the wire 100 is stretched and the wire diameter decreases. Then it enters the second wire groove 31 on the second traction wheel 3 corresponding to the variable diameter hole. After the wire 100 is partially wound inside the second wire groove 31, it is led out from the second wire groove 31 and enters the dividing groove 41 of the dividing wheel 4 corresponding to the second wire groove 31. Under the guidance of the dividing groove 41, the wire 100 changes direction and turns back to the same second wire groove 31 to continue winding for a certain length. After the wire 100 is drawn out again from the second groove 31, it is guided to the next first groove 21 on the first traction wheel 2 (the diameter of the groove is usually larger than the previous first groove 21), and the wire 100 is drawn out from the first groove 21. Repeat the above process of drawing out, threading through the mold, entering the groove, turning back, drawing out again and entering the next line groove, so that the cross-section of the wire 100 gradually decreases under multiple stretching actions until it reaches the designed cross-sectional size.

[0038] The wire drawing method of this application is applicable to the drawing of various types of wires 100, such as round wires, flat wires, and shaped wires. It achieves gradual diameter reduction of the wire 100 through multiple repeated stretching processes, ultimately forming the desired cross-sectional size. Specifically, this method leverages the structural advantages of the wire drawing device to effectively avoid problems such as wire overlap and friction during operation, reducing wire breakage and thus improving the quality and production efficiency of the drawn products. Simultaneously, this method is simple to operate, easily automates production, and can precisely control the cross-sectional changes of the wire 100, ensuring the dimensional accuracy of the wire 100 structure.

[0039] The foregoing has provided a detailed description of one embodiment of this application, but the description is merely a preferred embodiment and should not be construed as limiting the scope of this application. All equivalent variations and modifications made within the scope of this application should still fall within the patent coverage of this application.

[0040] It should be noted that the terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Descriptions in this application regarding directions such as "left," "right," "left side," "right side," "upper part," "lower part," "top," and "bottom" are defined based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, not to indicate or imply that the described structure must be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0041] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

Claims

1. A wire drawing device, characterized in that, include: A wire drawing die, which has at least one diameter-changing hole for changing the wire diameter; The first traction wheel and the second traction wheel are parallel to each other and are respectively disposed on the wire inlet side and the wire outlet side of the wire drawing die. The first traction wheel and the second traction wheel are respectively provided with a first wire groove and a second wire groove that correspond one-to-one with the variable diameter hole. A number of dividing wheels, the number of which is equal to the number of the second wire groove and the variable diameter hole and their positions correspond one-to-one. Each dividing wheel has a dividing groove on its circumferential surface. Each dividing groove is located on one side of the axial extension line of its corresponding variable diameter hole. The dividing groove is used to receive the wire from the corresponding second wire groove and guide the wire to fold back and return to the corresponding second wire groove.

2. The wire drawing device according to claim 1, characterized in that, Both the first traction wheel and the second traction wheel are tower wheels. The first traction wheel has a plurality of first grooves arranged sequentially along its axial direction, and the diameter of each first groove gradually changes. The second traction wheel has a plurality of second grooves arranged sequentially along its axial direction, and the diameter of each second groove gradually changes.

3. The wire drawing device according to claim 1, characterized in that, The wire drawing device also includes a guide wheel, which is disposed at the end of the second traction tower wheel and located on the side of the second wire groove away from the corresponding branch groove, for receiving and guiding the wire material of the second wire groove through the end to the subsequent equipment. A guide groove is provided on the circumferential surface of the guide wheel.

4. The wire drawing device according to claim 1, characterized in that, The inner wall of the dividing groove gradually narrows towards the bottom, forming a guiding structure.

5. The wire drawing device according to claim 1, characterized in that, The distance between the separator wheel and the second traction wheel is adjustable in the direction from the second traction wheel to the first traction wheel.

6. The wire drawing device according to claim 1, characterized in that, The inner diameter of the branch groove is smaller than the inner diameter of the corresponding second groove.

7. The wire drawing apparatus according to any one of claims 1-6, characterized in that, The central axis of the separator wheel is coplanar with the central axis of the first traction wheel and the central axis of the second traction wheel.

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