Pointing structure for wire drawing of metal wire

Abstract

The utility model provides a pointing structure for metal wire drawing, and relates to the technical field of metal wire drawing, the pointing structure comprises a conical roller rotating frame and a conical roller assembly, the conical roller assembly comprises two conical rollers symmetrically mounted on the conical roller rotating frame; when the conical roller rotating frame is driven to drive the conical roller assembly to rotate, the two conical rollers rotate and fit a pointed conical space, so that the wire diameter of the head of a metal wire penetrating into the pointed conical space is reduced, the metal wire penetrates through a wire drawing die, drawing and reducing are conducted, and the wire drawing efficiency of the metal wire is improved.

Description

Technical Field

[0001] This application relates to the field of metal wire drawing technology, and more particularly to a tipped structure for metal wire drawing. Background Technology

[0002] As various industries continue to demand higher quality metal wires, wire drawing processes are evolving towards higher precision and better performance. During wire drawing, the metal wire is passed through a drawing die with an aperture smaller than the wire diameter. The wire is then pulled through the die to reduce its diameter, ultimately forming a micron-level filament for use in semiconductor packaging.

[0003] Before a metal wire passes through a drawing die, the diameter of the wire head needs to be reduced. This process of reducing the wire head diameter is called wire tipping. Currently, metal wire tipping is generally performed using a core rolling mill. This involves machining rows of slots on upper and lower rolls, arranged from largest to smallest. The diameter of the slots on the same line gradually decreases according to a reduction ratio. The wire head is then inserted into the larger diameter section of the slot, and as the rolls rotate, the wire head diameter is gradually reduced. The disadvantages of this method are: (1) discontinuous rolling; if a larger reduction ratio is desired, repeated operation through multiple slots is required; (2) the wire needs to be rotated continuously, because the slots are fitted by the holes of the upper and lower rollers, and there will inevitably be gaps in the middle. If the wire is not rotated, the wire will have a reduction effect in the vertical direction, but the reduction effect in the horizontal direction will be poor, and even the cobra-like flash phenomenon may occur. Rotating the wire not only increases the workload, but may also continuously twist and damage the metal wire; (3) damage to the surface of the rolled wire, because the wire is rolled multiple times by rotating the wire, which can easily cause defects such as unevenness, wrinkles, and bending on the surface of the wire. This leads to low wire drawing efficiency. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this application provides a tipped structure for drawing metal wire, which can quickly and stably process a tip on the head of the metal wire, thereby drawing and changing the diameter, and improving the drawing efficiency.

[0005] This application provides a tipping structure for drawing metal wire, comprising: a conical roller rotating frame and a conical roller assembly, wherein the conical roller assembly includes two conical rollers symmetrically mounted on the conical roller rotating frame; wherein, when the conical roller rotating frame is driven to rotate with the conical roller assembly, the two conical rollers rotate and fit a tipping conical space, for reducing the head diameter of the metal wire passing through the tipping conical space.

[0006] In one possible implementation, it also includes:

[0007] An internal gear ring, wherein a channel for threading a metal wire is provided in the middle of the internal gear ring;

[0008] The conical roller gear, wherein the small bottom end of each conical roller meshes with the internal gear ring through the conical roller gear;

[0009] A tapered roller bottom bearing is disposed at one end of the tapered roller rotating frame, and the large bottom end of each tapered roller is connected to the tapered roller rotating frame through the tapered roller bottom bearing.

[0010] In one possible implementation, it also includes:

[0011] The other end of the conical roller rotating frame is connected to the motor. When the motor drives the conical roller rotating frame to rotate, the conical roller revolves around the axis of rotation of the conical roller rotating frame and rotates on its own axis at the same time, fitting out the pointed conical space.

[0012] The machine housing, the conical roller rotating frame and the conical roller assembly are disposed inside the machine housing, and the internal gear ring is mounted on the machine housing.

[0013] In one possible implementation, the conical roller rotating frame includes a rotating shaft and a turntable fixed together. The turntable has two circular slots symmetrically arranged at a certain distance from the rotation center of the conical roller rotating frame. A fixed shaft is provided at the large bottom end of the conical roller, and the fixed shaft is installed in the slots through a bearing at the bottom end of the conical roller.

[0014] Furthermore, a bearing support is provided inside the housing. The conical roller rotating frame is connected to the bearing support via a rotating frame bearing mounted on the rotating shaft, and is meshed with the drive gear connected to the output end of the motor via a rotating frame gear mounted on the rotating shaft.

[0015] In one possible implementation, a supporting inner ring is installed at the metal wire inlet of the housing, and a tapered roller top bearing is installed on the fixed shaft at the small bottom end of the tapered roller. When the tapered roller revolves, the tapered roller top bearing rotates on the supporting inner ring.

[0016] In one possible implementation, the bearing support includes a first bearing support and a second bearing support spaced apart, and the tapered roller rotating frame is connected to the first bearing support and the second bearing support respectively through the first rotating frame bearing and the second rotating frame bearing; and the rotating frame gear is disposed between the first rotating frame bearing and the second rotating frame bearing.

[0017] In one possible implementation, the surface of the tapered roller is a blade, a sprayed abrasive, or a cemented carbide.

[0018] In one possible implementation, two sets of the conical roller assembly are provided and symmetrically mounted on the conical roller rotating frame.

[0019] This embodiment also provides a metal wire drawing device, including a drawing die and any of the above-described tipping structures, for drawing a metal wire by reducing the head diameter of the metal wire through the tipping structure and then passing it through the sizing zone of the drawing die for drawing and diameter change.

[0020] Compared with the prior art, the beneficial effects of this application are:

[0021] The tipping structure for drawing metal wire provided in this embodiment drives the conical roller rotating frame to rotate the conical roller assembly to fit the tipping conical space, and then uses the tipping conical space to reduce the head diameter of the metal wire so that it can pass through the drawing die and be drawn to change diameter, thereby improving the drawing efficiency of metal wire. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the tipped structure for drawing metal wire according to an embodiment of this application is shown;

[0024] Figure 2 This invention provides a schematic diagram of the structure of the tapered space of the rolled tip formed by the rotational fitting of the tapered roller according to an embodiment of the present application.

[0025] Figure 3 This illustration shows a schematic diagram of the connection structure between the conical roller rotating frame and the motor according to an embodiment of this application;

[0026] Figure 4 This illustration shows a schematic diagram of the connection structure between the conical roller rotating frame and the conical roller according to an embodiment of this application;

[0027] Figure 5 This illustration shows a schematic diagram of the connection structure between the conical roller and the internal gear ring according to an embodiment of this application;

[0028] Figure 6 A schematic diagram of the connection structure between the tapered roller and the supporting inner ring according to an embodiment of this application is shown.

[0029] Explanation of key component symbols:

[0030] 1. Metal wire, 2. Housing, 3. Internal gear ring, 4. Bevel roller gear, 5. Bevel roller, 6. Bevel roller bottom bearing, 7. Bevel roller rotating frame, 8. First bearing support frame, 9. First rotating frame bearing, 10. Rotating frame gear, 11. Second bearing support frame, 12. Second rotating frame bearing, 13. Drive gear, 14. Motor, 15. Support inner ring, 16. Bevel roller top bearing, 17. Rolled conical space. Detailed Implementation

[0031] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0032] In the description of this application, 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", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0033] 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 application, "multiple" means two or more, unless otherwise explicitly specified.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction 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.

[0035] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] In view of the technical problems raised in the background art, this application provides a tipping structure for drawing metal wire, which can quickly and stably process a tip on the head of the metal wire, thereby drawing and changing the diameter, and improving the drawing efficiency.

[0037] See the instruction manual appendix Figure 1 Included with instruction manual Figure 2 This application provides a tipping structure for drawing metal wire, mainly composed of a housing 2 and a conical roller assembly and a conical roller rotating frame 7 disposed inside the housing 2. The conical roller assembly includes two conical rollers 5 symmetrically mounted on the conical roller rotating frame 7. One end of the conical roller rotating frame 7 is connected to a motor 14, and the other end is connected to the large bottom end of the conical roller 5 through a conical roller bottom bearing 6. An internal gear ring 3 is provided at the end of the housing 2 facing the inlet of the metal wire 1, and a channel for passing through the metal wire 1 is left in the middle. The small bottom end of the conical roller 5 is meshed with the internal gear ring 3 through a conical roller gear 4. When the motor 14 drives the conical roller rotating frame 7 to rotate, the two conical rollers 5 revolve around the axis of rotation of the conical roller rotating frame 7 and rotate on their own axis at the same time, fitting out a tipping conical space 17 to reduce the head diameter of the metal wire 1.

[0038] For details, please refer to the instruction manual appendix. Figure 1 Included with instruction manual Figure 3 The conical roller rotating frame 7 is mounted on a bearing support frame provided inside the housing 2 via the rotating frame bearing, and meshes with the drive gear 13 connected to the output end of the motor 14 via the rotating frame gear 10. Thus, when the motor 14 starts, it drives the drive gear 13 to rotate, and the drive gear 13 pushes the rotating frame gear 10 meshing with it to rotate, and the rotating frame gear 10 drives the conical roller rotating frame 7 to rotate.

[0039] To improve the rotational stability and accuracy of the conical roller rotating frame 7, multiple rotating frame bearings are preferably used. This is because if there is only one rotating frame bearing, all the loads (the conical roller rotating frame 7 itself and the driven conical roller 5) are concentrated on this one point, which can easily lead to local overload of the bearing, affecting its service life and rotational stability. Furthermore, rotational instability is often accompanied by vibration, which in turn affects the accuracy of the subsequent rotation of the conical roller rotating frame 7 and the conical roller 5 to roll the metal wire into a point. In one embodiment, the rotating frame bearing includes a first rotating frame bearing 9 and a second rotating frame bearing 12, and the bearing support frame includes a first bearing support frame 8 and a second bearing support frame 11 arranged at intervals. The first rotating frame bearing 9 is connected to the first bearing support frame 8, and the second rotating frame bearing 12 is connected to the second bearing support frame 11. This allows the loads (the conical roller rotating frame 7 itself and the driven conical roller 5) to be distributed to two support points, providing stable support and avoiding vibration caused by low stability, thus ensuring the rotational accuracy of the conical roller rotating frame 7.

[0040] See the instruction manual appendix Figure 4 The conical roller rotating frame 7 includes a rotating shaft and a turntable fixed together. The turntable has a slot on the side facing the internal gear ring 3 and near the edge. A fixed shaft is provided at the large bottom end of the conical roller 5, and the fixed shaft is installed in the slot through the bottom bearing 6 of the conical roller. Two slots are symmetrically arranged with respect to the rotation center of the conical roller rotating frame 7 for mounting two symmetrically arranged conical rollers.

[0041] See the instruction manual appendix Figure 5 The internal gear ring 3 is located at the end of the housing 2 facing the inlet of the metal wire 1, and a circular hole is provided in the middle of the internal gear ring 3 for installing the bevel roller gear 4 and for the metal wire 1 to pass through. The internal gear ring 3 is also provided with a flange for mounting the internal gear ring 3 to the housing 2. The small bottom end of the bevel roller 5 is engaged with the internal gear ring 3 through the bevel roller gear 4.

[0042] See the instruction manual appendix Figure 6To improve the structural rigidity and motion stability of the conical roller 5 during its revolution, a supporting force axially outward from the center of revolution is applied to the lower end of the conical roller 5. This force, together with the bearing 6 at the bottom of the conical roller, supports the conical roller 5, thus improving its structural rigidity and motion stability during revolution. A supporting inner ring 15 is provided at the end of the housing 2 facing the inlet of the metal wire 1. The supporting inner ring 15 has a central hole for the metal wire 1 to pass through and an outer cylindrical surface centered on the rotation center of the conical roller rotating frame 7. A conical roller top bearing 16 is mounted on the fixed shaft of the conical roller 5. The outer cylindrical surface of the conical roller top bearing 16 is tangent to the outer cylindrical surface of the supporting inner ring 15. When the conical roller 5 revolves around the rotation center of the conical roller rotating frame 7, the outer cylindrical surface of the conical roller top bearing 16 presses against the outer cylindrical surface of the supporting inner ring 15 during rotation, further improving the structural rigidity and motion stability of the conical roller 5. The inner support ring 15 is also provided with a flange for mounting the inner support ring 15 on the housing 2.

[0043] In one embodiment, the selected metal wire is a bonding wire blank, which is the raw material used to manufacture bonding wires. Bonding wires are fine metal wires widely used in the electronics industry, such as semiconductor packaging, and are mainly used to achieve electrical connections between chips and packaging substrates. The bonding wire blank is drawn into a fine wire that meets the bonding requirements through a wire drawing process. For example, in semiconductor packaging, the diameter of the bonding wire may be between tens of micrometers and hundreds of micrometers, depending on the different requirements of the chip. In other embodiments, other materials may also be used, and this application does not limit or fix this. When the motor 14 drives the conical roller rotating frame 7 to rotate, the conical roller 5 revolves around the axis of rotation of the conical roller rotating frame 7. Since the conical roller 5 meshes with the internal gear ring 3, while the conical roller 5 revolves around the axis of rotation of the conical roller rotating frame 7, the conical roller 5 also rotates on its own axis. When the conical roller 5 rotates at high speed, it fits the pointed conical space 17. When the head of the metal wire is inserted, a pointed tip can be processed by the continuous rotation and extrusion or grinding of the conical roller 5, thus achieving the effect of tipping.

[0044] It should be noted that the surface of the conical roller can be a hard material, an abrasive coating, or a cutting edge. When the surface of the conical roller is a hard material, the head diameter of the metal wire is extruded into a conical shape; when the surface of the conical roller is an abrasive coating, the head diameter of the metal wire is ground into a conical shape; when the surface of the conical roller is a cutting edge, the head diameter of the metal wire is machined into a conical shape. Furthermore, it should be noted that the conical roller assembly can be a single set, or two or more sets can be symmetrically arranged. Although setting multiple sets of conical roller assemblies increases the cost compared to setting a single set, it can improve the efficiency of metal wire tipping. The specific number of conical roller assemblies is selected according to application requirements, and this application does not impose any limitations or fixations on this.

[0045] Compared with the prior art, the tipping structure for drawing metal wire provided in this application can achieve tipping in one go without rotating the metal wire, which can avoid repeated operations and avoid damage to the metal wire.

[0046] This utility model also provides a metal wire drawing device, including a drawing die and any of the aforementioned tipping structures. The device is used to reduce the diameter of the metal wire head by the tipping structure, and then pass the wire through the sizing zone of the drawing die for drawing and diameter reduction, thereby improving the metal wire drawing efficiency. The drawing die is a technical feature well-known to those skilled in the art and will not be described in detail here.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0048] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

[0049] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A tipped structure for drawing metal wire, characterized in that, include: The system includes a conical roller rotating frame and conical roller assemblies, with two sets of conical roller assemblies symmetrically mounted on the rotating frame. Each conical roller assembly comprises two conical rollers symmetrically mounted on the rotating frame. When the rotating frame is driven to rotate, the two conical rollers rotate and fit into a tapered space to reduce the diameter of the head of the metal wire passing through the tapered space. The tapered structure further includes: An internal gear ring, wherein a channel for threading a metal wire is provided in the middle of the internal gear ring; The conical roller gear, wherein the small bottom end of each conical roller meshes with the internal gear ring through the conical roller gear; A tapered roller bottom bearing is disposed at one end of the tapered roller rotating frame, and the large bottom end of each tapered roller is connected to the tapered roller rotating frame through the tapered roller bottom bearing.

2. The tipped structure for drawing metal wire according to claim 1, characterized in that, Also includes: The other end of the conical roller rotating frame is connected to the motor. When the motor drives the conical roller rotating frame to rotate, the conical roller revolves around the axis of rotation of the conical roller rotating frame and rotates on its own axis at the same time, fitting out the pointed conical space. The machine housing, the conical roller rotating frame and the conical roller assembly are disposed inside the machine housing, and the internal gear ring is mounted on the machine housing.

3. The tipped structure for drawing metal wire according to claim 2, characterized in that, The conical roller rotating frame includes a rotating shaft and a turntable fixed together. The turntable has two circular slots symmetrically arranged at a certain distance from the rotation center of the conical roller rotating frame. A fixed shaft is provided at the large bottom end of the conical roller. The fixed shaft is installed in the slot through a bearing at the bottom end of the conical roller. Furthermore, a bearing support is provided inside the housing. The conical roller rotating frame is connected to the bearing support via a rotating frame bearing mounted on the rotating shaft, and is meshed with the drive gear connected to the output end of the motor via a rotating frame gear mounted on the rotating shaft.

4. The tipped structure for drawing metal wire according to claim 3, characterized in that, A supporting inner ring is installed at the metal wire inlet of the housing, and a tapered roller top bearing is installed on the fixed shaft at the small bottom end of the tapered roller. When the tapered roller revolves, the tapered roller top bearing rotates on the supporting inner ring.

5. The tipped structure for drawing metal wire according to claim 4, characterized in that, The bearing support includes a first bearing support and a second bearing support arranged at intervals. The tapered roller rotating frame is connected to the first bearing support and the second bearing support respectively through the first rotating frame bearing and the second rotating frame bearing. The rotating frame gear is disposed between the first rotating frame bearing and the second rotating frame bearing.

6. The tipped structure for drawing metal wire according to claim 3, characterized in that, The surface of the conical roller is a blade, coated with abrasive, or made of hard alloy.

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