Traction device for drawing flat copper wire and drawing device and production line thereof
By using multi-powered traction devices and transition units in the flat copper wire drawing process, the problems of insufficient friction and increased wire cold operation rate in traditional processes are solved, and a smaller volume traction device and a lower cold operation rate of flat copper wire are realized.
Patent Information
- Application Number
- CN202422082649.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-08-27
AI Technical Summary
In the traditional flat copper wire drawing process, the friction force is insufficient when the driving wheel comes into contact with the wire, resulting in too large a traction device. The wire is prone to increase in cold operation rate during the drawing process, and the toughness and plasticity decrease, making it difficult to participate in subsequent processing.
A multi-powered traction device is adopted to set up multiple active traction wheels, each main drive wheel requires less friction, fewer channels, and smaller volume of active traction wheel. At the same time, through the transition set and displacement control kit, the tensioning effect and outgoing speed of the flat copper wire are adjusted to reduce the deformation and offset of the wire.
It is achieved to ensure that the active traction wheel is small in size, sufficient traction force is provided to meet the pulling needs of flat copper wires, and at the same time prevent the cold working rate of the wires from further improving after drawing, reducing the floor area of the traction device and the deformation of the wires.
Smart Images
Figure CN222970633U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of metal drawing equipment, and particularly relates to a traction device for drawing flat copper wires, a drawing device and a production line thereof. Background Art
[0002] The drawing process of copper wires at normal temperature, also known as the cold drawing process, is an important metal processing method. This process pulls the wire blank through a die hole with a cross-section smaller than its own cross-section to achieve the purpose of drawing the wire blank to a specified size.
[0003] In the traditional drawing process, the traction device usually outputs the drawing force through the driving wheel and the wire dividing wheel. Since the frictional force generated when the driving wheel contacts the wire through a single channel is not sufficient to drive the drawing process, the wire dividing wheel is required for assistance. That is, at least several parallel channels are provided on both the driving wheel and the wire dividing wheel, so that the wire can form several wire loops between the two wheels, thereby increasing the overall contact area between the driving wheel and the wire and improving the driving friction of the driving wheel.
[0004] However, during the drawing process of flat copper wires, a greater traction force is usually required, that is, a greater frictional force is generated between the wire and the driving wheel. Therefore, more channels need to be provided on the driving wheel. However, to adapt to the shape of the flat copper wire, the width of a single channel itself is much larger than the width of the channel required for processing wire materials such as round copper wires. Coupled with the requirement of increasing the number of channels, it is easy to significantly increase the volume of the driving wheel and the wire dividing wheel, resulting in too large an area occupied by the traction device and being inconvenient for the daily observation and maintenance of workers.
[0005] Meanwhile, during the driving process of the flat copper wire, it usually first enters the first channel closest to the driving wheel side, and then is guided by the wire dividing wheel into the second channel relatively far from this side, and finally is guided until it reaches the final channel on the other side of the driving wheel before leaving the driving wheel. During this period, the flat copper wire is pulled for a long time and over a long distance (at least exceeding the length of its own wide side) in the direction of its wide side, which easily causes a further increase in its cold work rate, a further decrease in toughness and plasticity, etc., resulting in difficulty in participating in subsequent processing steps. Summary of the Utility Model
[0006] The technical problem to be solved by the utility model is to provide a traction device for drawing flat copper wires, which can provide sufficient traction force to meet the drawing requirements of flat copper wires while ensuring a relatively small size of the driving traction wheel, and at the same time prevent the cold work rate of the flat copper wire after drawing from further increasing.
[0007] The utility model is realized by the following technical solutions.
[0008] A traction device for drawing flat copper wires, comprising a main body and several groups of wheel sets arranged on the main body. It is characterized in that several groups of wheel sets are successively arranged along the drawing process of the flat copper wire: an incoming wire guiding wheel set for guiding the flat copper wire into the subsequent drawing kit; a main driving wheel set for pulling the flat copper wire through the drawing kit to complete the drawing process. The main driving wheel set at least includes two main driving wheels and several traction motors respectively connected to the main driving wheels. Along the winding path of the flat copper wire on a single main driving wheel, several accommodating channels are arranged in parallel. The accommodating channels are used to accommodate the flat copper wire; an outgoing wire guiding wheel set for guiding the drawn flat copper wire to leave the current drawing processing area.
[0009] The utility model adopts a multi-power driving form, that is, multiple main driving wheels are set. Some of the main driving wheels can not only perform active traction but also play the role of a wire dividing wheel for wire dividing. On the premise that the total driving force requirement remains unchanged, the total friction required remains the same. However, after setting multiple main driving wheels, the friction that each main driving wheel needs to share is smaller, that is, the friction coating area required on a single main driving wheel is smaller, that is, the number of accommodating channels that can be set is less, and thus the volume of a single main driving wheel is smaller.
[0010] The change in the requirements for the main driving wheels further results in a lower power consumption requirement for the motors connected to the single main driving wheels themselves. According to the inventor's test, a single motor with a power of 15 KW is required for single-wheel driving to draw a flat wire with a specification of 45 mm 2 (with a cross-sectional reduction rate of 11.5%). For double-wheel driving to draw a flat wire with a specification of 45 mm 2 (with a cross-sectional reduction rate of 11.5%), two motors with a power of 5.5 KW are required, and the same effect of drawing can be achieved with a smaller total power. At the same time, before and after the flat copper wire enters and exits the main driving wheels, the deformation amount along the length direction of its wide side is less, preventing the further increase of the cold working rate of the flat copper wire after drawing.
[0011] As a further improvement of the utility model, 3 to 5 accommodating channels are arranged in parallel along the winding path of the flat copper wire on the main driving wheel.
[0012] As a further improvement of the utility model, a transition wheel set is also arranged between the main driving wheel set and the outgoing wire guiding wheel set, which includes a transition wheel and a connecting rod connecting the transition wheel to the main body. The length of the connecting rod is used to limit the distance between the transition wheel and the main body, thereby guiding and limiting the first distance between the flat copper wire leaving the main driving wheel and the main body.
[0013] Although the size of the active traction wheel is reduced, the deformation of the flat copper wire along the length direction of its own wide side is less before and after passing through the active traction wheel. However, the flat copper wire still deflects. In order to cooperate with the inlet of the subsequent processing equipment, it is usually necessary to adjust the position of the flat copper wire in the length direction of its own wide side. If it is directly adjusted from the active traction wheel to the position of the outgoing wire guiding wheel in the outgoing wire guiding wheel group in one step, it is easy to cause excessive wire deflection, especially when the drawing speed is relatively fast, resulting in situations such as the flat copper wire deviating and breaking away from the accommodation channel of the active traction wheel. Therefore, a transition wheel needs to be provided for transition guidance.
[0014] As a further improvement of the present invention, the transition wheel group further includes a displacement control kit, which is connected to the end of the connecting rod away from the transition wheel and is used to control the second distance between the transition wheel and the active traction wheel. By controlling the second distance, the working speed of the drawing process can be adjusted. If the rotational speed of the active traction wheel remains unchanged and the second distance increases, the outgoing wire speed after the traction of the traction device can be slowed down; conversely, the outgoing wire speed can be increased. At the same time, the tensioning effect on the flat copper wire can be achieved by increasing the second distance.
[0015] As a further improvement of the present invention, the displacement control kit adjusts the second distance by controlling the height position of the transition wheel in the vertical direction.
[0016] As a further improvement of the present invention, the control range of the height position of the transition wheel in the vertical direction by the displacement control kit is 0 - 50 cm, that is, the displacement control kit adjusts the transition wheel to move vertically downward by a maximum of 50 cm from the highest position, and conversely, it also moves vertically upward by a maximum of 50 cm from the lowest position. If the control range is too large, it is also easy to cause a stretching effect on the flat copper wire, thereby increasing its cold working rate.
[0017] As a further improvement of the present invention, the power of a single traction motor is 5 - 6 KW.
[0018] In a second aspect, the present utility model provides a flat copper wire drawing device, which is characterized in that it includes at least one set of the traction device for flat copper wire drawing as described above and at least one set of the drawing kit. The drawing kit is arranged between the wire inlet guiding wheel set and the active traction wheel set. In the drawing kit, a drawing die and a cooling component are sequentially arranged along the processing flow of the flat copper wire, and the cooling component is used to cool the drawn flat copper wire. That is, in the drawing device, it can include two sets of continuously arranged drawing kits and one set of traction device, and both sets of drawing kits are arranged between the wire inlet guiding wheel set and the active traction wheel set of the same set of traction device. It can also include two sets of drawing kits and two sets of traction devices, and the two sets of drawing kits are respectively arranged between the wire inlet guiding wheel set and the active traction wheel set of their respective traction devices.
[0019] As a further improvement of the present utility model, one set of the traction device for flat copper wire drawing and one set of the drawing kit arranged between the wire inlet guiding wheel set and the active traction wheel set together form a single drawing set, and the flat copper wire drawing device includes at least one set of single drawing sets.
[0020] In a third aspect, the present embodiment provides a flat copper wire production line, which is characterized in that it includes any one of the traction devices for flat copper wire drawing as described above or any one of the flat copper wire drawing devices as described above.
[0021] The beneficial effects of the present utility model are as follows: The traction device can provide sufficient traction force to meet the drawing requirements of flat copper wire, and at the same time has a low power requirement for a single traction motor, achieving the effect of providing a large traction force with a small total power. And in the present utility model, the number of accommodation channels on a single active traction wheel is reduced, which not only reduces the floor area of the active traction wheel and even the entire traction device for flat copper wire drawing, but also reduces the deformation amount of the flat copper wire, preventing further increase in its cold working rate and causing inconvenience in subsequent processing. Description of the Drawings
[0022] The following drawings are provided and combined with the preferred embodiments in the present utility model to help understand the purpose and advantages of the present utility model, where:
[0023] Figure 1 It is a schematic structural diagram of the flat copper wire drawing device;
[0024] Figure 2 It is a schematic diagram of the layout of the accommodation channels on the active traction wheel;
[0025] Figure 3 It is a schematic cross-sectional diagram of the flat copper wire. Detailed Embodiments
[0026] The present utility model will be further described in detail below with reference to the drawings and embodiments.
[0027] In this specification, orientation terms such as up, down, left, right, front, back, front side, back side, top, bottom, etc., which are mentioned or may be mentioned, are defined relative to the structures shown in the respective drawings. The terms "inner" and "outer" refer to the directions towards or away from the geometric center of a specific component respectively. They are relative concepts and may therefore change accordingly depending on their different positions and usage states. Therefore, these or other orientation terms should not be construed as restrictive terms either.
[0028] In this embodiment, the object to be towed is a flat copper wire. The cross-sectional view of the flat copper wire is as Figure 3 shown, including a narrow side W' and a wide side L'. The surface where the wide side L' of the upper cross-section of the flat copper wire is located is the wide surface, and the surface where the narrow side W' of the cross-section is located is the narrow surface. In the flat copper wire, the length of the wide side L' is greater than the width of the narrow side W', so the area of the wide surface is much larger than that of the narrow surface.
[0029] Embodiment 1:
[0030] A traction device for drawing flat copper wires includes a main body part A01 and several groups of wheel sets arranged on the main body part A01. In this embodiment, three groups of wheel sets are basically included, and they are successively arranged as an incoming wire guiding wheel set 1, a driving traction wheel set 2, and an outgoing wire guiding wheel set 3 along the drawing process of the flat copper wire.
[0031] Among them, the incoming wire guiding wheel set 1 is used to guide the flat copper wire into the subsequent drawing kit A02; the driving traction wheel set 2 is used to tow the flat copper wire through the drawing kit A02 to complete the drawing process; the outgoing wire guiding wheel set 3 is used to guide the drawn flat copper wire out of the current drawing processing area.
[0032] In this embodiment, the driving traction wheel set 2 includes two driving traction wheels 201 and two traction motors respectively connected to the driving traction wheels 201. In this embodiment, the power of a single traction motor is 5.5 KW. As Figure 2 shown, five accommodating channels 202 are arranged in parallel along the winding path of the flat copper wire on a single driving traction wheel 201, and the accommodating channels 202 are used to accommodate the flat copper wire.
[0033] Preferably, as Figure 1As shown, a transition wheel set 4 is also provided between the active traction wheel set 2 and the wire outlet guiding wheel set 3. In the transition wheel set 4, there is a transition wheel 401 and a connecting rod for connecting the transition wheel 401 and the main body part A01. In this embodiment, when the flat copper wire leaves the active traction wheel 201, it is 50 cm away from the main body part A01; the connecting rod fixes the transition wheel 401 at a position 40 cm away from the main body part A01, that is, when the flat copper wire is guided by the transition wheel 401, the first distance between the flat copper wire and the main body part A01 is 40 cm; and the wire outlet guiding wheel in the wire outlet guiding wheel set 3 is fixed at a position 30 cm away from the specific main body part A01. In summary, the transition wheel set 4 can adjust the first distance within the numerical range between the distance between the flat copper wire and the main body part A01 when the flat copper wire leaves the active traction wheel 201 and the distance between the flat copper wire and the main body part A01 when the flat copper wire reaches the wire outlet guiding wheel set 3, thereby realizing the transition and guiding functions of the transition wheel 401.
[0034] Preferably, the transition wheel set 4 further includes a displacement control kit 402, which is connected to the end of the connecting rod far from the transition wheel 401, and is used to control the second distance L between the transition wheel 401 and the active traction wheel 201, so as to play a role in tensioning the flat copper wire and adjusting the wire outlet speed, etc.
[0035] Preferably, the displacement control kit 402 adjusts the second distance L by controlling the height position of the transition wheel 401 in the vertical direction. In this embodiment, a hydraulic rod is used as the power source in the displacement control kit 402 to drive the movement of the transition wheel 401.
[0036] Specifically, when the displacement control kit 402 controls the transition wheel 401 to lower in the vertical direction, the second distance L is enlarged. At this time, the transition wheel 401 plays a tensioning role; or when the traction speed of the active traction wheel 201 remains unchanged, the enlargement of the second distance L can also achieve the effect of slowing down the wire outlet speed (that is, the speed at which the flat copper wire leaves the current drawing processing area after passing through the wire outlet guiding wheel set 3).
[0037] On the contrary, when the displacement control kit 402 controls the transition wheel 401 to rise in the vertical direction, the second distance L is reduced. At this time, usually the traction speed of the active traction wheel 201 will increase. On the premise of ensuring the tension of the flat copper wire, the transition wheel 401 matches the traction speed of the active traction wheel 201 and speeds up the wire outlet speed of the flat copper wire.
[0038] Preferably, the control range of the displacement control kit 402 for the height position of the transition wheel 401 in the vertical direction is 0 - 50 cm, that is, the displacement control kit 402 adjusts the transition wheel 401 to move vertically downward from the highest position by at most 50 cm.
[0039] Embodiment 2:
[0040] A flat copper wire drawing device includes two sets of traction devices for flat copper wire drawing as described in any of the embodiments and two sets of drawing kits A02. In this embodiment, the two sets of drawing kits A02 are respectively arranged between the wire inlet guiding wheel sets 1 and the active traction wheel sets 2 of the two sets of traction devices, that is, one set of drawing kit A02 and one set of traction device form a single drawing set, and two sets of single drawing sets are continuously arranged in this embodiment.
[0041] In each set of drawing kits A02, a drawing die and a cooling component are sequentially arranged along the processing flow of the flat copper wire. Among them, the cooling component is used to cool the flat copper wire after drawing.
[0042] At the same time, in this embodiment, in the second set of single drawing sets arranged along the drawing processing flow of the flat copper wire, the function of the wire inlet guiding wheel set 1 can be replaced by the wire outlet guiding wheel set 3 in the first set of single drawing sets. Therefore, one set of wire inlet guiding wheel sets 1 is omitted in this embodiment.
[0043] Embodiment 3:
[0044] A flat copper wire production line includes a flat copper wire drawing device as described in Embodiment 2, and can draw flat copper wires that meet the composite size requirements and have a high qualified rate.
[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A traction device for drawing a flat copper wire, comprising a main body (A01) and a plurality of wheel groups arranged on the main body (A01), characterized in that: Several groups of wheels are arranged in sequence along with the drawing process of the flat copper wire: A wire entry guide wheel assembly (1) for guiding the flat copper wire into a subsequent drawing kit (A02); An active traction wheel group (2) for pulling the flat copper wire through the drawing kit (A02) to complete the drawing process, the active traction wheel group (2) comprising at least two active traction wheels (201) and a plurality of traction motors respectively connected to the active traction wheels (201), a single active traction wheel (201) being provided with a plurality of accommodating channels (202) arranged in parallel along the winding path of the flat copper wire, the accommodating channels (202) being used to accommodate the flat copper wire; The wire outlet guide wheel assembly (3) is used to guide the flat copper wire after drawing to leave the current drawing processing section.
2. A traction device for drawing a flat copper wire according to claim 1, characterized in that: Three to five accommodating channels (202) are arranged in parallel on the active traction wheel (201) along the winding path of the flat copper wire.
3. A traction device for drawing a flat copper wire according to claim 1, characterized in that: A transition wheel group (4) is also provided between the active traction wheel group (2) and the outlet wire guide wheel group (3), comprising a transition wheel (401) and a connecting rod connecting the transition wheel (401) and the main body (A01), wherein the length of the connecting rod is used to limit the distance between the transition wheel (401) and the main body (A01), thereby guiding and limiting the flat copper wire leaving the active traction wheel (201) to form a first distance with the main body (A01).
4. A traction device for drawing a flat copper wire according to claim 3, characterized in that: The transition wheel assembly (4) further comprises a displacement control kit (402), the displacement control kit (402) being connected to an end of the connecting rod away from the transition wheel (401) and being used to control a second travel distance (L) between the transition wheel (401) and the active traction wheel (201).
5. A traction device for drawing a flat copper wire according to claim 4, characterized in that: The displacement control kit (402) adjusts the second distance (L) by controlling the height position of the transition wheel (401) in the vertical direction.
6. A traction device for drawing a flat copper wire according to claim 5, characterized in that: The displacement control kit (402) controls the height position of the transition wheel (401) in the vertical direction within a range of 0 to 50 cm.
7. A traction device for drawing a flat copper wire according to claim 1, characterized in that: The power of a single traction motor is 5~6 KW.
8. A flat copper wire drawing device, characterized in that: The invention comprises at least one set of a traction device for drawing a flat copper wire as described in any one of claims 1 to 5 and at least one set of the drawing kit (A02), wherein the drawing kit (A02) is arranged between the wire entry guide wheel group (1) and the active traction wheel group (2), and the drawing die and cooling assembly are arranged in sequence in the drawing kit (A02) along the processing flow of the flat copper wire, and the cooling assembly is used to cool the flat copper wire after drawing.
9. A flat copper wire drawing device according to claim 8, characterized in that: A set of the flat copper wire drawing traction device and a set of drawing sets (A02) arranged between the wire entry guide wheel set (1) and the active traction wheel set (2) together constitute a set of single drawing sets, and the flat copper wire drawing device includes at least one set of single drawing sets.
10. A flat copper wire production line, characterized in that: It comprises a traction device for drawing a flat copper wire as described in any one of claims 1 to 7 or a flat copper wire drawing device as described in any one of claims 8 or 9.