Drawing cone pulley mechanism and multi-pass wire drawing equipment

Abstract

The utility model relates to the technical field of drawing equipment, in particular to a drawing cone pulley mechanism and multi-pass wire drawing equipment. The drawing cone pulley mechanism comprises a cone pulley group, and a wire drawing die frame and a first guide wheel group which are sequentially arranged on one side of the cone pulley group; the cone pulley group comprises N cone pulleys which are arranged in parallel; the wire-drawing die frame comprises M wire-drawing dies; the first guide wheel group comprises M first guide wheels which are arranged in one-to-one correspondence with the wire-drawing dies; the wire is guided by the first guide wheel group, penetrates through the die orifice of the wire-drawing die, is wound on the cone pulley and is rewound on the first guide wheel group, and multi-pass drawing is performed by repeating the steps; wherein the total drawing pass is M, M is larger than or equal to 2, N is larger than or equal to 2 and smaller than or equal to M. Each cone pulley at least carries out one-pass wire drawing. The drawing cone pulley mechanism solves the problem that due to the fact that the number of drawing passes is increased, the sliding coefficient difference between the first pass and the last pass is too large, and wires are broken, and the drawing efficiency of a single machine is remarkably improved.

Description

[0001] This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on July 7, 2023, with the application number 2023108301082 and the invention title "A Drawing Tower Pulley Mechanism, a Heating Furnace, and a Multi-pass Wire Drawing Equipment", the entire content of which is incorporated herein by reference. Technical Field

[0002] The utility model relates to the technical field of wire drawing equipment, and particularly relates to a drawing tower pulley mechanism and a multi-pass wire drawing equipment. Background Art

[0003] High-strength tungsten alloy wires have gradually replaced carbon steel wires in fields such as diamond wire cutting, precision mechanical ropes, cut-resistant protection, and screen printing due to their comprehensive excellent properties such as higher strength (tensile strength exceeding 5500 MPa) and finer wire diameters (diameter less than 0.037 mm), and are widely used.

[0004] Currently, the drawing of high-strength and low-diameter metal wire materials (tungsten wires) mainly uses a sliding drawing device. However, the existing sliding drawing device has the following problems:

[0005] (1) As Figures 1-3 shown, the current sliding multi-pass drawing device uses a segmented stepped tower pulley. Multi-pass wire materials are wound on the same segmented stepped tower pulley. Due to the design requirements of the tower pulley steps and the coaxiality requirements, the number of drawing passes is generally 6 or 8, not exceeding 10 passes, and more passes cannot be integrated, resulting in low single-pass drawing efficiency.

[0006] (2) As Figures 4-6 shown, the current sliding drawing device uses a straight cylinder tower pulley. Multi-pass wire materials are wound on the same straight cylinder tower pulley. From the first pass to the last pass, the wire diameter specifications of the wire materials gradually become thinner. Since the rotation speed of the straight cylinder tower pulley is the same, and the wire diameter of the wire materials gradually becomes thinner, the difference in the slipping amount between passes becomes larger; in the straight cylinder sliding drawing method, after the number of drawing passes exceeds 7 passes, due to the too large difference in the sliding coefficients between the first pass and the last pass, it is extremely easy to break wires frequently; limited by the above reasons, the straight cylinder tower pulley generally does not exceed 10 passes, and the single-pass drawing efficiency is not high. Summary of the Utility Model

[0007] To solve the problems in the prior art mentioned in the above background art, the utility model provides a drawing tower pulley mechanism and a multi-pass wire drawing equipment. The technical solution of the drawing tower pulley is as follows:

[0008] The drawing tower wheel mechanism includes a tower wheel group, a drawing die frame and a first guide wheel group which are sequentially arranged on one side of the tower wheel group; the tower wheel group includes N tower wheels arranged in parallel; the drawing die frame includes M drawing dies, and the first guide wheel group includes M first guide wheels which are arranged in one-to-one correspondence with the drawing dies; the wire is guided by the first guide wheel group, passes through the die opening of the drawing die, is wound around the tower wheel and is wound back onto the first guide wheel group, and multiple drawing passes are performed repeatedly in this way; wherein the total number of drawing passes is M, M is greater than or equal to 2, N is greater than or equal to 2 and less than or equal to M, and each tower wheel 110 performs at least one wire drawing pass.

[0009] In some embodiments, the front tower wheel is provided with a giving way mechanism for the wire material wound on the rear tower wheel to pass through, and the front tower wheel is closer to the drawing die frame than the rear tower wheel.

[0010] In some embodiments, the giving way mechanism is a thin rod; the front tower wheel includes the thin rod and a tower wheel body, so that the wire material wound on the rear tower wheel can pass through the space above the thin rod.

[0011] In some embodiments, the giving way mechanism is a groove; a groove is provided on the upper part of a partial area of ​​the previous tower wheel, so that the wire material wound on the next tower wheel can pass through the groove of the previous tower wheel (110).

[0012] In some embodiments, the N step pulleys are staggered along their axial direction so that the wire wound on the step pulley does not pass through the area where the step pulley adjacent to it is located.

[0013] In some embodiments, the step pulley is a straight-cylinder step pulley and / or a segmented stepped step pulley.

[0014] In some embodiments, the step pulley assembly includes a segmented stepped step pulley; a second guide pulley assembly is provided between the step pulley assembly and the wire drawing die frame.

[0015] In some embodiments, the second guide wheel group includes M second guide wheels arranged in one-to-one correspondence with the wire drawing dies.

[0016] The utility model also provides a multi-pass wire drawing device, which comprises the drawing tower wheel mechanism as described above.

[0017] Compared with the prior art, the pulley provided by the utility model has the following beneficial effects:

[0018] The drawing tower pulley mechanism of the present application: It adopts the method of arranging multiple tower pulleys side by side to form a tower pulley group. Through the corresponding cooperation between the tower pulley group and the wire drawing die holder, and the winding cooperation between the first guide pulley group and the tower pulley group, multi-pass wire materials are distributed on multiple tower pulleys, solving the problem of wire breakage caused by excessive difference in sliding coefficients between the first and last passes due to an increase in the number of drawing passes, and significantly improving the single-stage drawing efficiency; moreover, due to the winding cooperation design of the tower pulley group, the wire drawing die holder, and the first guide pulley group, on the basis of ensuring that multi-pass wire materials are distributed on multiple tower pulleys, multi-pass drawing is integrated together, effectively saving equipment space and wire material production space. Brief Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is the front view of a multi-pass wire drawing device with a segmented stepped tower pulley in the prior art;

[0021] Figure 2 It is the top view of a multi-pass wire drawing device with a segmented stepped tower pulley in the prior art;

[0022] Figure 3 It is the perspective view of a multi-pass wire drawing device with a segmented stepped tower pulley in the prior art;

[0023] Figure 4 It is the front view of a multi-pass wire drawing device with a straight cylindrical tower pulley in the prior art;

[0024] Figure 5 It is the top view of a multi-pass wire drawing device with a straight cylindrical tower pulley in the prior art;

[0025] Figure 6 It is the perspective view of a multi-pass wire drawing device with a straight cylindrical tower pulley in the prior art;

[0026] Figure 7 It is the front view of the multi-pass wire drawing device provided in Embodiment 1;

[0027] Figure 8 It is the top view of the multi-pass wire drawing device provided in Embodiment 1;

[0028] Figure 9 It is the perspective view of the multi-pass wire drawing device provided in Embodiment 1;

[0029] Figure 10 It is the top view of the tower pulley group and the wire drawing die holder in Embodiment 1;

[0030] Figure 11 It is a perspective view of the cone pulley set and the wire drawing die holder in Embodiment 1;

[0031] Figure 12 It is a top view of the cone pulley set and the wire drawing die holder in Embodiment 2;

[0032] Figure 13 It is a perspective view of the cone pulley set and the wire drawing die holder in Embodiment 2;

[0033] Figure 14 It is a top view of the cone pulley set and the wire drawing die holder in Embodiment 3;

[0034] Figure 15 It is a perspective view of the cone pulley set and the wire drawing die holder in Embodiment 3;

[0035] Figure 16 It is a top view of the multi-pass wire drawing device in Embodiment 4;

[0036] Figure 17 It is a top view of the cone pulley in Embodiment 4;

[0037] Figure 18 It is a top view of the cone pulley and the wire drawing die holder in Embodiment 5.

[0038] Reference numerals: 10 cone pulley set, 20 wire drawing die holder, 30 first guide pulley set, 40 heating furnace, 50 tension control mechanism, 60 wire feeding mechanism, 70 winding mechanism, 110 cone pulley, 111 thin rod, 112 cone pulley body, 112a segmented stepped cone pulley, 112b straight cylindrical cone pulley, 113 area, 113a first area, 113b second area, 113c third area, 210 wire drawing die, 310 first guide pulley, 410 furnace body shell, 420 heating component, 430 furnace chamber. Detailed implementation manners

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0040] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0041] The present utility model provides a multi-pass wire drawing device as described in Figures 7-11 Example 1, Figures 12-13 Example 2, Figures 14-15 Example 3, Example 4 in 16 - 17, Figure 18 Example 5, which includes a drawing tower wheel mechanism, a heating furnace 40, and a tension control mechanism 50 for adjusting the wire tension.

[0042] Regarding the drawing tower wheel mechanism

[0043] Design 1 of the drawing tower wheel mechanism:

[0044] As Figures 7-11 Example 1, Figures 12-13 Example 2, Figures 14-15 shown in Example 3, the drawing tower wheel mechanism includes a tower wheel group 10, a wire drawing die holder 20 arranged on one side of the tower wheel group 10 in sequence, and a first guide wheel group 30; the tower wheel group 10 includes N tower wheels 110 arranged in parallel; the wire drawing die holder 20 includes M wire drawing dies 210; the wire is guided by the first guide wheel group 30, passes through the die orifice of the wire drawing die 210, is wound around the tower wheel 110 and then rewound to the first guide wheel group 30, and so on for multiple passes of drawing; where the total number of drawing passes is M, M is greater than or equal to 2, N is greater than or equal to 2 and less than or equal to M, and each tower wheel 110 performs at least one pass of wire drawing.

[0045] Specifically, as Figures 7-11 shown, during the drawing process, the wire in the first pass is guided by the first guide wheel group 30, passes through the die orifice of the wire drawing die 210, is wound around the tower wheel 110 and then rewound to the first guide wheel group 30. After rewinding, like the first pass, the second pass of drawing starts; and so on until the last pass.

[0046] When in use, wires of multiple passes are divided into multiple groups and drawn by multiple tower wheels 110 respectively. For example, in the present embodiment 1, the total number of passes is eight, which are divided into two groups, with four passes in each group. The wires of the first to fourth passes are drawn on the first tower wheel 110, and so on. The fifth and eighth passes are drawn on the second tower wheel 110.

[0047] In summary, the drawing tower wheel mechanism of the utility model adopts a method of arranging multiple tower wheels 110 in parallel to form a tower wheel group 10, and distributes multiple passes of wire on multiple tower wheels 110 through the corresponding cooperation between the tower wheel group 10 and the drawing die frame 20, and the rewinding cooperation between the first guide wheel group 30 and the tower wheel group 10. Among them, since each independent tower wheel 110 can independently adjust the rotation speed, the problem of wire breakage caused by excessive difference in sliding coefficients between the first and last passes due to an increase in the number of drawing passes is solved, and the single-machine drawing efficiency is improved; and due to the rewinding cooperation design of the tower wheel group 10, the drawing die frame 20, and the first guide wheel group 30, on the basis of ensuring that multiple passes of wire are distributed on multiple tower wheels 110, multiple drawing passes are integrated together, effectively saving equipment space and wire production space.

[0048] It should be noted that: in this embodiment 1, two parallel arranged step pulleys 110 are provided, the total number of drawing passes and the number of wire drawing dies 210 are 8 (M=2), and the 8 wires are divided into 2 groups to be drawn through the two step pulleys 110; according to the above design concept, the number of step pulleys 110 and the number of wires drawn on each step pulley 110 can be adaptively adjusted according to the total number of drawing passes M. Moreover, it is not limited to the same number of wires in each group, for example, 8 wires can be divided into 2 groups and drawn on different step pulleys 110, one group has 3 passes and the other group has 5 passes, including but not limited to the embodiment 1 scheme, preferably, the wire drawing passes on each step pulley 110 do not exceed eight.

[0049] Preferably, if Figures 7-11 Embodiment 1, Figures 12-13 Embodiment 2, Figures 14-15 As shown in Embodiment 3, the front pulley 110 is provided with a giving way mechanism for the wire material wound on the rear pulley 110 to pass through, and the front pulley 110 is closer to the wire drawing die frame 20 than the rear pulley 110 .

[0050] Preferably, if Figures 7-11 Embodiment 1, Figures 12-13 Embodiment 2, Figures 14-15 As shown in Example 3, the giving way mechanism is a thin rod 111 ; the preceding tower wheel 110 includes the thin rod 111 and a tower wheel body 112 , so that the wire material wound on the following tower wheel 110 can pass through the space above the thin rod 111 .

[0051] like Figures 7-11 Embodiment 1,Figures 12-13 Embodiment 2, Figures 14-15 As shown in Example 3, when in use, the diameter of the thin rod 111 is smaller than the diameter of the tower wheel body 112 (in Example 2-3, a segmented stepped tower wheel 112a is provided, and the diameter of the thin rod 111 is smaller than the minimum diameter of the tower wheel body 112). This design allows the wire material passing through the die opening of the wire drawing die 210 to pass through the space above the thin rod 111 and be wound around the next tower wheel 110.

[0052] It should be noted that in the present embodiments 1-3, the yielding mechanism is a thin rod 111, and the step pulley 110 is composed of the thin rod 111 and the step pulley body 112, so that the wire can pass through the gap above the thin rod 111 of the previous step pulley 110; according to the above design concept, other schemes that can achieve the above effects can also be adopted, for example, Figure 18 In the staggered design of the tower pulley 110 shown in Example 5, N of the tower pulleys 110 are staggered along their axial direction so that the wire wound on the tower pulley 110 does not pass through the area where the adjacent tower pulley 110 is located; for example, a groove is provided on the upper part of a partial area of ​​the previous tower pulley 110 so that the wire wound on the subsequent tower pulley 110 can pass through the groove of the previous tower pulley 110, including but not limited to the embodiment scheme.

[0053] Preferably, if Figures 7-11 Embodiment 1, Figures 12-13 Embodiment 2, Figures 14-15 As shown in Example 3, the first guide wheel group 30 includes M first guide wheels 310 arranged in one-to-one correspondence with the wire drawing dies 210.

[0054] When in use, each pass of wire is equipped with a first guide wheel 310 to separate each pass, which is convenient and practical for line alignment and wire buffering of each pass.

[0055] Preferably, the step pulley 110 is a straight-cylinder step pulley 112b and / or a segmented stepped step pulley 112a.

[0056] like Figures 7-11 Embodiment 1, Figures 12-13 Embodiment 2, Figures 14-15 As shown in the third embodiment, the plurality of step pulleys 110 in the step pulley assembly 10 may be any combination of a straight-tube step pulley 112b and a segmented stepped step pulley 112a.

[0057] Preferably, when the step pulley assembly 10 includes a segmented stepped step pulley 110a, a second guide pulley assembly (not shown) is provided between the step pulley assembly 10 and the drawing die frame 20. Preferably, the second guide pulley assembly includes M second guide pulleys corresponding to the drawing dies 210 one by one.

[0058] After the wire material passes through the wire drawing die 210, there is a height difference in the stepped pulley 110a in different passes. The second guide pulley is used for guiding to adapt to the height difference from the wire drawing die 210 to the stepped pulley 110a in different passes, so as to improve the drawing effect.

[0059] Design two of the drawing pulley mechanism:

[0060] As Figures 16-17 Shown in Embodiment 4, the drawing pulley mechanism includes a pulley 110; the surface of the pulley 110 is axially divided into at least Z section areas 113; wherein, the surface roughness of each section area 113 is different, so that the surface friction coefficient of each section area 113 is different; wherein, the total number of drawing passes is M, M is greater than or equal to 2, Z is greater than or equal to 2 and less than or equal to M; each area 113 is used for drawing the wire material for at least one pass.

[0061] Preferably, it further includes a wire drawing die holder 20 and a first guide pulley group 30 arranged on one side of the wire drawing die holder 20 away from the pulley 110; the wire drawing die holder 20 includes M wire drawing dies 210; the wire material is guided by the first guide pulley group 30, passes through the die orifice of the wire drawing die 210, winds around the pulley 110 and then winds back to the first guide pulley group 30, and so on for multiple passes of drawing.

[0062] Specifically, as Figures 16-17 Shown, during the drawing process, the wire material in the first pass is guided by the first guide pulley group 30, passes through the die orifice of the wire drawing die 210, winds around the pulley 110 and then winds back to the first guide pulley group 30. After winding back, like the first pass, the second pass of drawing starts; and so on until the last pass.

[0063] Among them, during use, the wire materials in multiple passes are divided into Z groups and are respectively arranged on Z different roughness areas 113 of the pulley 110, and the wire material is drawn by winding on each area 113 of the pulley 110. For example: in this Embodiment 4, the total number of passes is eight, divided into three groups (Z = 3). The 1st - 3rd passes wind around the first area 113a, the 4th - 5th passes wind around the second area 113b, and the 6th - 8th passes wind around the third area 113c. And from the area 113 where the first pass is located to the area 113 where the last pass is located, the roughness increases from Ra0.05 to Ra0.8.

[0064] In summary, in the above-mentioned drawing tower pulley mechanism of the present utility model, the tower pulley 110 is designed to be divided into at least Z regions 113 with different roughnesses. The multi-pass wire materials are distributed on multiple regions 113 with different roughnesses of the tower pulley 110 for wire drawing, so that at the same rotational speed of the tower pulley 110, the friction coefficients between each region 113 and the wire materials can be adjusted. Among them, although the Z regions 113 are located on the surface of the same tower pulley 110, due to the different roughnesses of different regions 113, the friction coefficients between each region 113 and the wire materials can be adjusted, thereby solving the problem of wire breakage caused by too large a difference in the sliding coefficients between the first and last passes due to an increase in the number of wire drawing passes.

[0065] For the existing segmented stepped tower pulley 110, due to the design requirements of the tower pulley 110 steps and the coaxiality requirements, the number of wire drawing passes is generally 6 or 8, not exceeding 10; while the design of the tower pulley 110 divided into at least Z regions 113 with different roughnesses is not limited by the design requirements of the tower pulley steps and the coaxiality requirements, and can be carried out according to the total number of wire drawing passes M, and the number Z of regions 113 on the surface of the tower pulley 110 and the roughness of each region 113 can be adaptively adjusted to adapt to the processing of more wire drawing passes.

[0066] Moreover, through the corresponding cooperation between the tower pulley 110 and the wire drawing die holder 20, and the winding cooperation between the first guide wheel group 30 and the tower pulley 110, while ensuring that the multi-pass wire materials are distributed on multiple regions 113 with different roughnesses, the multi-pass wire drawing is integrated together, effectively saving the equipment space and the wire material production space.

[0067] Preferably, as Figures 16-17 shown in Embodiment 4, different coatings are applied to the surfaces of each section of the region 113 to make the surface roughnesses of each section of the region 113 different. Optionally, the coating is one or a combination of alumina coating, zirconia coating, WC coating, chromium coating, titanium carbide coating, titanium nitride coating, carbonitride coating.

[0068] Preferably, the first guide wheel group 30 includes M first guide wheels 310 arranged in one-to-one correspondence with the wire drawing dies 210.

[0069] During use, each pass of wire material is equipped with a first guide wheel 310 to separate each pass, which is convenient for aligning the lines of each pass and buffering the passing of the wire, and is convenient and practical.

[0070] It should be noted that:

[0071] According to the above design concept, for the number Z of regions 113 with different roughnesses, it can be adaptively adjusted according to the total number of drawing passes M, including but not limited to the solution of Embodiment 4. Similarly, for the roughness design of different regions 113, it can be adaptively adjusted according to the total number of drawing passes M, including but not limited to the solution with a surface roughness Ra of 0.05 - 0.8 described in Embodiment 4;

[0072] In the statements of "axially divided into at least Z sections of region 113" and "N of the said capstans 110 are staggered in the axial direction" described in this article, the axial direction refers to the rotating shaft of the capstan 110.

[0073] According to the above design concept, other methods can also be used to make the roughnesses of the Z regions 113 different, including but not limited to the above-mentioned solutions of coating different coatings. Similarly, according to the above design concept, existing coatings other than the above-mentioned alumina coating, zirconia coating, WC coating (tungsten carbide coating), chromium coating, titanium carbide coating, titanium nitride coating, and carbonitride coating can also be used for coating to adjust the roughness of region 113, including but not limited to the solution of the embodiment.

[0074] Regarding the combination of Drawing Capstan Mechanism Design One and Drawing Capstan Mechanism Design Two:

[0075] In the solution of using N capstans 110 arranged in parallel to form the capstan group 10, according to the above design concept, the capstans 110 in the capstan group 10 can be set to have Z sections of regions 113 with different roughnesses to further improve the single - machine drawing efficiency and drawing quality.

[0076] As Figures 7-11 in Embodiment 1, Figure 18 as shown in Embodiment 5, the capstan structure is the capstan group 10; the capstan group 10 includes N capstans 110 arranged in parallel. In the solution of the above capstan group 10 design, at least one of the N capstans 110 can also be designed such that its surface is axially divided into at least Z sections of region 113; the surface roughness of each section of the region 113 is different, so that the surface friction coefficient of each section of the region 113 is different; where M is greater than or equal to 3, N is greater than or equal to 2 and less than M, Z is greater than or equal to 2 and less than M, and each region 113 and each capstan 110 are used for at least one pass of wire drawing.

[0077] In the solution of using N capstans 110 arranged in parallel to form the capstan group 10, at least one of the capstans 110 in the capstan group 10 is designed to have Z sections of regions 113 with different roughnesses. During drawing, each region 113 and each capstan 110 are used for at least one pass of wire drawing. In this way, the equipment space utilization rate is higher, and the single - machine drawing efficiency and drawing quality are better; for example, Figure 18In Embodiment 5, a cone pulley 110 is provided with Z regions 113 of different roughnesses.

[0078] In addition, a multi-pass wire drawing device shown in Embodiments 1-5 of the present utility model includes a drawing cone pulley mechanism, a heating furnace 40, and a tension control mechanism 50 for adjusting the wire tension:

[0079] The multi-pass wire drawing device includes a tension control mechanism 50 for adjusting the wire tension, a heating furnace 40, and a drawing cone pulley mechanism; the heating furnace 40 includes a furnace body shell 410 and a heating component 420 disposed in a furnace chamber 430 of the furnace body shell 410, which is disposed between the wire drawing die holder 20 and the first guide wheel set 30, and the wire of each pass passes through the furnace chamber 430 of the heating furnace 40 for heating; the tension control mechanism 50 is disposed on a side of the first guide wheel set 30 away from the wire drawing die holder 20; wherein, after the wire passes through the tension control mechanism 50 and the first guide wheel set 30 in sequence, it then passes through the furnace chamber 430 of the heating furnace 40 and the wire drawing die 210 of the wire drawing die holder 20 in sequence, and is wound around the cone pulley 110, and then wound back to the tension control mechanism 50 to perform the next pass of drawing, and so on for multi-pass drawing.

[0080] Preferably, as Figures 7-11 shown in Embodiment 1, it further includes an unwinding mechanism 60 for unwinding the wire of the first pass.

[0081] Preferably, as Figures 7-11 shown in Embodiment 1, it further includes a winding mechanism 70 for winding the wire of the last pass.

[0082] To verify the effect of the present application, the following experimental comparison data are given:

[0083] (1) To verify the effect of the solution of the present application adopting the method of combining multiple cone pulleys arranged side by side to form a cone pulley group, the following verification tests are provided:

[0084] Verification Experiment 1: Using the device of Embodiment 1 to perform 8-pass wire drawing, wherein, the two cone pulleys 110 of the cone pulley group 10 are respectively arranged with 4 passes of wire, and the measured results are: the wire breakage rate during drawing is 6.1%, and the average length per single coil is 267,000 meters;

[0085] Comparative Experiment 1: The difference between the device used in Comparative Experiment 1 and Verification Experiment 1 is only that: using a segmented (8-segment) stepped cone pulley 110a as shown in Figure 3 to replace the two cone pulleys 110 of the cone pulley group 10, and the measured results are: the wire breakage rate during drawing is 13.9%, and the average length per single coil is 138,000 meters;

[0086] Comparative Experiment 2: The difference between the device used in Comparative Experiment 2 and Verification Experiment 1 is only that: using a Figure 6When a straight cylindrical cone pulley 110b replaces the two cone pulleys 110 of the cone pulley set 10 as shown, the measured results are: the wire drawing breakage rate is 18.5%, and the average length per single coil is 126,000 meters.

[0087] The above data shows that: when using the cone pulley set 10 divided into two cone pulleys 110 for wire drawing, the breakage rate of the wire rod can be effectively reduced, and the output length per single coil can be increased.

[0088] (2) In order to verify the solution of the present application that uses a plurality of cone pulleys arranged side by side and combined into a cone pulley set, and its effect applied to wire drawing in more passes, the following verification tests are provided:

[0089] Verification Experiment Two: The only difference between the equipment used in Verification Experiment Two and Verification Experiment One is that: the number of straight cylindrical cone pulleys 110 used is 3, the number of wire drawing dies 210 is 12 (12 corresponding to the first guide pulley 310), the first cone pulley 110 distributes 5 wire rods (the one close to the wire drawing die 210), the second cone pulley 110 distributes 4 wire rods, and the third cone pulley 110 distributes 3 wire rods. The measured results are: the wire drawing breakage rate is 8.7%, and the average length per single coil is 238,000 meters;

[0090] Verification Experiment Three: The only difference between the equipment used in Verification Experiment Three and Verification Experiment Two is that: the number of cone pulleys 110 used is 2, among which, one is a straight cylindrical cone pulley 110b, and one is a segmented stepped cone pulley 110a (divided into 4 segments). The straight cylindrical cone pulley 110b distributes 4 wire rods (the one close to the wire drawing die 210), and the segmented stepped cone pulley 110a distributes 4 wire rods; the measured results are: the wire drawing breakage rate is 5.9%, and the average length per single coil is 269,000 meters;

[0091] Verification Experiment Four: The only difference between the equipment used in Verification Experiment Four and Verification Experiment Two is that: the number of cone pulleys 110 used is 2, and both are segmented stepped cone pulleys 110a (divided into 4 segments). The first segmented stepped cone pulley 110a distributes 4 wire rods (the one close to the wire drawing die 210), and the second segmented stepped cone pulley 110a distributes 4 wire rods; the measured results are: the wire drawing breakage rate is 7.9%, and the average length per single coil is 253,000 meters;

[0092] Verification Experiment Five: The only difference between the equipment used in this verification experiment and Verification Experiment Two is that: the number of cone pulleys 110 used is 3, the number of wire drawing dies 210 is 8 (8 corresponding to the first guide pulley 310), the first cone pulley 110 distributes 3 wire rods (the one close to the wire drawing die 210), the second cone pulley 110 distributes 3 wire rods, and the second cone pulley 110 distributes 2 wire rods. The measured results are: the wire drawing breakage rate is 4.6%, and the average length per single coil is 292,000 meters;

[0093] Comparative Experiment 3: The only difference between the equipment used in this comparative experiment and that in Verification Experiment 2 is that: a segmented (12 segments) stepped pulley 110a is used to replace the three pulleys 110 of the pulley group 10. The measured results are: the wire breakage rate during wire drawing is 30.8%, and the average length per single coil is 65,000 meters.

[0094] Comparative Experiment 4: The only difference between the equipment used in this comparative experiment and that in Verification Experiment 2 is that: a straight cylindrical pulley 110b is used to replace the three pulleys 110 of the pulley group 10. The measured results are: the wire breakage rate during wire drawing is 43.2%, and the average length per single coil is 42,000 meters.

[0095] The above data shows that: using the pulley group 10 composed of multiple pulleys 110 for wire drawing can effectively reduce the wire breakage rate of the wire rod and increase the output length per single coil.

[0096] Compared with the prior art, the solution of the embodiment of the present utility model has the following beneficial effects:

[0097] (1) The wire drawing pulley mechanism of the present application: It adopts the method of combining multiple pulleys arranged side by side to form a pulley group. Through the corresponding cooperation between the pulley group and the wire drawing die holder, and the winding cooperation between the first guide pulley group and the pulley group, the multi-pass wire materials are distributed on multiple pulleys, solving the problem of wire breakage caused by too large a difference in the sliding coefficients of the first and last passes due to the increase in the number of wire drawing passes. The single-machine wire drawing efficiency is significantly improved;

[0098] Moreover, due to the winding cooperation design of the pulley group, the wire drawing die holder, and the first guide pulley group, on the basis of ensuring that the multi-pass wire materials are distributed on multiple pulleys, the multi-pass wire drawing is integrated together, effectively saving the equipment space and the wire material production space.

[0099] (2) The wire drawing pulley provided by the present application is divided into at least Z regions with different roughnesses, solving the problem of wire breakage caused by too large a difference in the sliding coefficients of the first and last passes due to the increase in the number of wire drawing passes. The single-machine wire drawing efficiency is significantly improved.

[0100] Moreover, it adopts the pulley design divided into at least Z regions with different roughnesses and the winding cooperation design with the wire drawing die holder and the first guide pulley group. On the basis of ensuring that the multi-pass wire materials are distributed in each region of the pulley, the multi-pass wire drawing is integrated together, effectively saving the equipment space and the wire material production space.

[0101] (3) Additionally, the drawing tower wheel mechanism provided in this application combines the design of arranging multiple tower wheels side by side to form a tower wheel group with the design of a tower wheel divided into at least Z sections with different roughness areas. Through the corresponding cooperation between the tower wheel group and the wire drawing die holder, and the winding cooperation between the first guide wheel group and the tower wheel group, multiple passes of wire are distributed on multiple tower wheels, solving the problem of wire breakage caused by excessive difference in sliding coefficients between the first and last passes due to an increase in the number of drawing passes, and significantly improving the single - machine drawing efficiency; moreover, due to the winding cooperation design of the tower wheel structure, the wire drawing die holder, and the first guide wheel group, on the basis of ensuring that multiple passes of wire are distributed on multiple tower wheels, multiple - pass drawing is integrated together, effectively saving equipment space and wire production space.

[0102] Although terms such as tower wheel, wire drawing die holder, and first guide wheel group are used more frequently in this text, the possibility of using other terms is not excluded. These terms are only used to more conveniently describe and explain the essence of the present utility model; interpreting them as any additional limitation is contrary to the spirit of the present utility model.

[0103] Finally, it should be noted that: the above - mentioned embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model 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 on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A pulling tower wheel mechanism, characterized in that: It comprises a step pulley assembly (10), a wire drawing die frame (20) and a first guide wheel assembly (30) which are sequentially arranged on one side of the step pulley assembly (10); The step pulley assembly (10) comprises N step pulleys (110) arranged in parallel; the wire drawing die frame (20) comprises M wire drawing dies (210); and the first guide wheel assembly (30) comprises M first guide wheels (310) arranged in one-to-one correspondence with the wire drawing dies (210); The wire is guided by the first guide wheel group (30), passes through the die opening of the wire drawing die (210), is wound around the tower wheel (110), and is wound back onto the first guide wheel group (30), and is repeatedly drawn for multiple passes; The total number of drawing passes is M, M is greater than or equal to 2, N is greater than or equal to 2 and less than or equal to M, and each tower wheel (110) performs at least one drawing pass of the wire.

2. The pulley mechanism according to claim 1, characterized in that: The front tower wheel (110) is provided with a giving way mechanism for the wire material wound on the rear tower wheel (110) to pass through, and the front tower wheel (110) is closer to the wire drawing die frame (20) than the rear tower wheel (110).

3. The pulley mechanism according to claim 2, characterized in that: The yielding mechanism is a thin rod (111); The front step pulley (110) comprises a thin rod (111) and a step pulley body (112), so that the wire material wound on the rear step pulley (110) can pass through the space above the thin rod (111).

4. The pulley mechanism according to claim 2, characterized in that: The giving way mechanism is a groove; A groove is provided at the upper portion of a partial area of ​​the front tower wheel (110), so that the wire material wound on the rear tower wheel (110) can pass through the groove of the front tower wheel (110).

5. The pulley mechanism according to claim 1, characterized in that: The N tower wheels (110) are staggeredly distributed along the axial direction thereof, so that the wire material wound on the tower wheels (110) does not pass through the area where the adjacent tower wheels (110) are located.

6. The pulling tower pulley mechanism according to any one of claims 1 to 5, characterized in that: The step pulley (110) is a straight-cylinder step pulley (110b) and / or a segmented stepped step pulley (110a).

7. The pulley mechanism according to any one of claims 1 to 5, characterized in that: The step pulley assembly (10) comprises a segmented stepped step pulley (110a); A second guide wheel assembly is provided between the step wheel assembly (10) and the wire drawing die frame (20).

8. The pulley mechanism according to claim 7, characterized in that: The second guide wheel group includes M second guide wheels arranged in one-to-one correspondence with the wire drawing dies (210).

9. A multi-pass wire drawing device, characterized in that: It comprises a pulling tower wheel mechanism as described in any one of claims 1 to 8.

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