Drawing cone pulley mechanism and multi-pass wire drawing equipment

Abstract

The invention 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 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 (110) is at least used for drawing a wire for one pass. 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 the Chinese patent application filed with the China Patent Office on July 7, 2023, with application number 2023108301082, and invention name “A drawing tower wheel mechanism, heating furnace and multi-pass wire drawing equipment”, the entire contents of which are incorporated by reference in this application. Technical Field

[0002] The invention relates to the technical field of drawing equipment, and in particular to a drawing tower wheel mechanism and multi-pass wire drawing equipment. Background Art

[0003] High-strength tungsten alloy wire has been gradually replacing carbon steel wire for its comprehensive excellent properties such as higher strength (tensile strength exceeds 5500MPa) and thinner wire diameter (diameter is less than 0.037mm) in the fields of diamond wire cutting, precision mechanical ropes, cut-resistant protection and screen printing.

[0004] At present, the drawing of high-strength and low-wire-diameter metal wire (tungsten wire) is mainly carried out by a sliding drawing device, but the existing sliding drawing device has the following problems:

[0005] (1) Figure 1-3 As shown, the current sliding multi-pass drawing device adopts a segmented stepped tower wheel, and multiple passes of wire are wound on the same segmented stepped tower wheel. Due to the design requirements of the tower wheel steps and the coaxiality requirements, the drawing passes are generally 6 or 8, not more than 10, and more passes cannot be integrated, resulting in low single-machine drawing efficiency.

[0006] (2) Figure 4-6 As shown, the current sliding drawing device adopts a straight-cylinder tower wheel, and multiple passes of wire are wound on the same straight-cylinder tower wheel. From the first pass to the last pass, the wire diameter specification of the wire gradually becomes finer. Since the rotation speed of the straight-cylinder tower wheel is consistent, and the wire diameter gradually becomes finer, the difference in slippage between passes becomes larger; when the straight-cylinder sliding drawing method is used for drawing passes exceeding 7, the difference in sliding coefficient between the first pass and the last pass is too large, and the wire is prone to frequent breakage; due to the above reasons, the straight-cylinder tower wheel generally does not exceed 10 passes, and the efficiency of a single drawing is not high. Summary of the invention

[0007] In order to solve the problems in the prior art mentioned in the above background technology, the present invention provides a drawing tower wheel mechanism and a multi-pass wire drawing device. The technical solution of the drawing tower wheel is as follows:

[0008] The drawing tower wheel mechanism comprises a tower wheel group, a wire 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 comprises N tower wheels arranged in parallel; the wire drawing die frame comprises M wire drawing dies; the wire material is guided by the first guide wheel group, passes through the die opening of the wire drawing die, is wound around the tower wheel and is wound back around the first guide wheel group, and multiple drawing passes are performed 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 first guide wheel group includes M first guide wheels arranged in one-to-one correspondence with the wire drawing dies.

[0012] In some embodiments, the step pulley is a straight-cylinder step pulley and / or a segmented stepped step pulley.

[0013] 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.

[0014] In some embodiments, the second guide wheel group includes M second guide wheels arranged in one-to-one correspondence with the wire drawing dies.

[0015] The drawing tower wheel mechanism includes a tower wheel and a drawing die frame; the drawing die frame includes M drawing dies; the surface of the tower wheel is divided into at least Z sections along its axial direction; wherein the surface roughness of each section of the area is different, so that the surface friction coefficient of each section of the area 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; at least one wire drawing pass is performed in each area.

[0016] In some embodiments, the surface of each section of the region is coated with a different coating so that the surface roughness of each section of the region is different.

[0017] In some embodiments, the surface roughness Ra of the region is 0.05-0.8.

[0018] In some embodiments, it also includes a first guide wheel group arranged on the side of the drawing die frame away from the tower wheel; the wire material 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 reciprocatingly.

[0019] The present invention also provides a multi-pass wire drawing device, which comprises the drawing tower wheel mechanism as described above.

[0020] Compared with the prior art, the pulley provided by the present invention has the following beneficial effects:

[0021] (1) The drawing tower wheel mechanism of the present invention is designed in such a way that a plurality of tower wheels are arranged in parallel to form a tower wheel group. Through the corresponding cooperation between the tower wheel group and the drawing die frame, and the rewinding cooperation between the first guide wheel group and the tower wheel group, multiple passes of wire are distributed on multiple tower wheels, thereby 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. The single-machine drawing efficiency is significantly improved. In addition, due to the rewinding cooperation design of the tower wheel group, the drawing die frame and the first guide wheel group, multiple passes of drawing are integrated together on the basis of ensuring that multiple passes of wire are distributed on multiple tower wheels, thereby effectively saving equipment space and wire production space.

[0022] (2) The present invention designs a drawing tower pulley mechanism: the tower pulley is divided into at least Z sections with different roughness, so as to solve the problem of wire breakage caused by excessive difference in sliding coefficient between the first and last passes due to an increase in the number of drawing passes, and the single-machine drawing efficiency is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 It is a front view of the existing multi-pass drawing equipment using a segmented stepped tower wheel;

[0025] Figure 2 It is a top view of the existing multi-pass drawing equipment using a segmented stepped tower wheel;

[0026] Figure 3 It is a three-dimensional diagram of the existing multi-pass drawing equipment using a segmented stepped tower wheel;

[0027] Figure 4 It is a front view of the existing multi-pass drawing equipment using a straight-tube tower wheel;

[0028] Figure 5 It is a top view of the existing multi-pass drawing equipment using a straight-tube tower wheel;

[0029] Figure 6 It is a three-dimensional diagram of the existing multi-pass drawing equipment using a straight-tube tower wheel;

[0030] Figure 7 A front view of the multi-pass drawing apparatus provided in Example 1;

[0031] Figure 8 A top view of the multi-pass drawing apparatus provided in Example 1;

[0032] Fig. 9 A three-dimensional diagram of a multi-pass drawing apparatus provided in Example 1;

[0033] Fig.10 It is a top view of the tower wheel assembly and the wire drawing die frame in Example 1;

[0034] Fig.11 It is a three-dimensional diagram of the tower wheel assembly and the wire drawing die frame in Example 1;

[0035] Fig.12 It is a top view of the tower wheel assembly and the wire drawing die frame in Example 2;

[0036] Fig.13 It is a three-dimensional diagram of the tower wheel assembly and the wire drawing die frame in Example 2;

[0037] Fig.14 It is a top view of the tower wheel assembly and the wire drawing die frame in Example 3;

[0038] Fig.15 It is a three-dimensional diagram of the tower wheel assembly and the wire drawing die frame in Example 3;

[0039] Fig.16 A top view of the multi-pass drawing device in Example 4;

[0040] Fig.17 A top view of the tower wheel in Example 4;

[0041] Fig.18 This is a top view of the tower wheel and the drawing die frame in Example 5.

[0042] Figure numerals: 10 tower wheel group, 20 wire drawing die frame, 30 first guide wheel group, 40 heating furnace, 50 tension control mechanism, 60 wire unwinding mechanism, 70 winding mechanism, 110 tower wheel, 111 thin rod, 112 tower wheel main body, 112a segmented stepped tower wheel, 112b straight cylinder tower wheel, 113 area, 113a first area, 113b second area, 113c third area, 210 wire drawing die, 310 first guide wheel, 410 furnace shell, 420 heating assembly, 430 furnace chamber. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0045] The present invention provides Figure 7-11 Embodiment 1, Figure 12-13 Embodiment 2, Figure 14-15 Example 3, 16-17 Example 4, Fig.18 A multi-pass wire drawing device shown in Example 5 includes a drawing tower pulley mechanism, a heating furnace 40 and a tension control mechanism 50 for adjusting the wire tension.

[0046] For the pulley mechanism

[0047] Design of pulley mechanism:

[0048] like Figure 7-11 Embodiment 1, Figure 12-13 Embodiment 2, Figure 14-15 As shown in Example 3, the drawing tower wheel mechanism includes a tower wheel group 10, a drawing die frame 20 and a first guide wheel group 30 which are sequentially arranged on one side of the tower wheel group 10; the tower wheel group 10 includes N tower wheels 110 arranged in parallel; the drawing die frame 20 includes M drawing dies 210; the wire is guided by the first guide wheel group 30, passes through the die opening of the drawing die 210, is wound around the tower wheel 110 and is wound back to the first guide wheel group 30, and multiple drawing passes are performed reciprocatingly; 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.

[0049] Specifically, Figure 7-11As shown, during the drawing process, the wire of the first pass is guided by the first guide wheel group 30, passes through the die opening of the wire drawing die 210, is wound on the tower wheel 110 and is rewound onto the first guide wheel group 30. After rewinding, the second drawing is started in the same manner as the first drawing, and so on until the last drawing.

[0050] 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.

[0051] In summary, the drawing tower wheel mechanism of the present invention adopts a method of arranging multiple tower wheels 110 in parallel to form a tower wheel group 10. 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, multiple passes of wire are distributed on multiple tower wheels 110. 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. In addition, due to the rewinding cooperation design of the tower wheel group 10, the drawing die frame 20, and the first guide wheel group 30, while 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.

[0052] 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.

[0053] Preferably, if Figure 7-11 Embodiment 1, Figure 12-13 Embodiment 2, Figure 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 .

[0054] Preferably, if Figure 7-11 Embodiment 1, Figure 12-13 Embodiment 2, Figure 14-15As 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 .

[0055] like Figure 7-11 Embodiment 1, Figure 12-13 Embodiment 2, Figure 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.

[0056] 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, Fig.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.

[0057] Preferably, if Figure 7-11 Embodiment 1, Figure 12-13 Embodiment 2, Figure 14-15 As shown in Example 3, the first guide wheel group 30 includes M first guide wheels 310 arranged in a one-to-one correspondence with the wire drawing dies 210.

[0058] 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.

[0059] Preferably, the step pulley 110 is a straight-cylinder step pulley 112b and / or a segmented stepped step pulley 112a.

[0060] like Figure 7-11 Embodiment 1, Figure 12-13 Embodiment 2, Figure 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-cylinder step pulley 112b and a segmented stepped step pulley 112a.

[0061] 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.

[0062] After the wire passes through the drawing die 210, there is a height difference between the segmented stepped pulley 110a at different passes. A second guide wheel is used for guidance to adapt to the height difference from the drawing die 210 to the segmented stepped pulley 110a at different passes, thereby improving the drawing effect.

[0063] Design of pulley mechanism 2:

[0064] like Figure 16-17 As shown in Example 4, the drawing tower wheel mechanism includes a tower wheel 110; the surface of the tower wheel 110 is divided into at least Z sections 113 along its axial direction; wherein the surface roughness of each section of the area 113 is different, so that the surface friction coefficient of each section of the 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 performs at least one wire drawing pass.

[0065] Preferably, it also includes a wire drawing die frame 20 and a first guide wheel group 30 arranged on the side of the wire drawing die frame 20 away from the tower wheel 110; the wire drawing die frame 20 includes M wire drawing dies 210; the wire material 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 to the first guide wheel group 30, and multiple drawing passes are performed reciprocatingly.

[0066] Specifically, Figure 16-17 As shown, during the drawing process, the wire of the first pass is guided by the first guide wheel group 30, passes through the die opening of the wire drawing die 210, is wound on the tower wheel 110 and is rewound onto the first guide wheel group 30. After rewinding, the second drawing is started in the same manner as the first drawing, and so on until the last drawing.

[0067] When in use, the wires of multiple passes are divided into Z groups, which are arranged on Z areas 113 of different roughness of the tower wheel 110, and the wires are drawn by winding on each area 113 of the tower wheel 110. For example, in this embodiment 4, there are eight passes in total, which are divided into three groups (Z=3), and the 1st to 3rd passes are wound on the first area 113a, the 4th to 5th passes are wound on the second area 113b, and the 6th to 8th passes are wound on 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.

[0068] In summary, in the above-mentioned drawing tower wheel mechanism of the present invention, the tower wheel 110 is designed to be divided into at least Z sections of areas 113 with different roughness, and multiple passes of wire are distributed on the multiple areas 113 with different roughness of the tower wheel 110 for drawing, so that at the same rotation speed of the tower wheel 110, the friction coefficient between each area 113 and the wire can be adjusted. Among them, although the Z section area 113 is located on the surface of the same tower wheel 110, due to the different roughness of different areas 113, the friction coefficient between each area 113 and the wire can be adjusted, thereby 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.

[0069] The existing segmented stepped pulley 110 generally has 6 or 8 drawing passes, and no more than 10 passes, due to the design requirements of the steps of the pulley 110 and the requirements of coaxiality. The design of the pulley 110 is divided into at least Z sections of areas 113 with different roughness. The design is not limited by the design requirements of the steps of the pulley and the requirements of coaxiality. According to the total drawing passes M, the number Z of areas 113 on the surface of the pulley 110 and the roughness of each area 113 can be adaptively adjusted to accommodate more drawing passes.

[0070] Furthermore, through the corresponding cooperation between the tower wheel 110 and the drawing die frame 20, and the winding cooperation between the first guide wheel group 30 and the tower wheel 110, while ensuring that multiple passes of wire are distributed in multiple areas 113 with different roughness, multiple drawing passes are integrated together, effectively saving equipment space and wire production space.

[0071] Preferably, if Figure 16-17 As shown in Example 4, the surface of each section of the region 113 is coated with a different coating so that the surface roughness of each section of the region 113 is different. Optionally, the coating is a combination of one or more of an aluminum oxide coating, a zirconium oxide coating, a WC coating, a chromium coating, a titanium carbide coating, a titanium nitride coating, and a titanium carbonitride coating.

[0072] Preferably, the first guide wheel assembly 30 includes M first guide wheels 310 arranged in one-to-one correspondence with the wire drawing dies 210 .

[0073] 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.

[0074] It should be noted that:

[0075] According to the above design concept, the number Z of regions 113 with different roughness can be adaptively adjusted according to the total drawing passes M, including but not limited to the scheme of Example 4. Similarly, the roughness design of different regions 113 can be adaptively adjusted according to the total drawing passes M, including but not limited to the scheme of the surface roughness Ra of 0.05 to 0.8 described in the scheme of Example 4;

[0076] In the descriptions herein of “divided into at least Z segment areas 113 along its axial direction” and “N of the step pulleys 110 are staggeredly distributed along its axial direction”, the axial direction refers to the rotation axis of the step pulley 110 .

[0077] According to the above design concept, other methods can be used to make the roughness of the Z regions 113 different, including but not limited to the above scheme of applying different coatings. Similarly, according to the above design concept, existing coatings other than the above aluminum oxide coating, zirconium oxide coating, WC coating (tungsten carbide coating), chromium coating, titanium carbide coating, titanium nitride coating, and titanium carbonitride coating can also be used to adjust the roughness of the region 113, including but not limited to the embodiment scheme.

[0078] For the combination of pull-out tower wheel mechanism design 1 and pull-out tower wheel mechanism design 2:

[0079] In the scheme of forming a step pulley assembly 10 with N step pulleys 110 arranged in parallel, according to the above design concept, the step pulleys 110 in the step pulley assembly 10 can be set as Z-segment areas 113 with different roughness to further improve the single-unit drawing efficiency and drawing quality.

[0080] like Figure 7-11 Embodiment 1, Fig.18 As shown in Example 5, the step pulley structure is a step pulley group 10; the step pulley group 10 includes N step pulleys 110 arranged in parallel. In the design scheme of the step pulley group 10, it can also be designed that the surface of at least one step pulley 110 among the N step pulleys 110 is divided into at least Z sections 113 along its axial direction; the surface roughness of each section of the section 113 is different, so that the surface friction coefficient of each section of the section 113 is different; wherein, 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 section 113 and each step pulley 110 are subjected to at least one wire drawing operation.

[0081] In the scheme of forming a pulley assembly 10 with N parallel arranged pulleys 110, at least one pulley 110 in the pulley assembly 10 is designed to be a Z-section area 113 with different roughness. During drawing, each area 113 and each pulley 110 are used to draw the wire at least once. In this way, the equipment space utilization rate is higher, and the single-unit drawing efficiency and drawing quality are better; for example, Fig.18In Embodiment 5, a step pulley 110 is configured as a Z-segment region 113 with different roughness.

[0082] In addition, the multi-pass wire drawing equipment shown in Examples 1-5 provided by the present invention includes a drawing tower wheel mechanism, a heating furnace 40 and a tension control mechanism 50 for adjusting the wire tension:

[0083] The multi-pass wire drawing equipment includes a tension control mechanism 50 for adjusting the wire tension, a heating furnace 40, and a drawing tower wheel mechanism; the heating furnace 40 includes a furnace shell 410 and a heating component 420 arranged in a furnace chamber 430 of the furnace shell 410, which is arranged between the wire drawing die frame 20 and the first guide wheel group 30, and each pass of the wire passes through the furnace chamber 430 of the heating furnace 40 for heating; the tension control mechanism 50 is arranged on the side of the first guide wheel group 30 away from the wire drawing die frame 20; wherein, after the wire passes through the tension control mechanism 50 and the first guide wheel group 30 in turn, and then passes through the furnace chamber 430 of the heating furnace 40 and the drawing die 210 of the wire drawing die frame 20 in turn, it is wound on the tower wheel 110, and is wound back to the tension control mechanism 50 for the next pass of drawing, and multiple passes of drawing are performed reciprocatingly.

[0084] Preferably, if Figure 7-11 As shown in the embodiment 1, it also includes a reeling mechanism 60, which is used to release the first pass of wire material.

[0085] Preferably, if Figure 7-11 As shown in the embodiment 1, a winding mechanism 70 is also included, which is used to wind up the wire material of the last pass.

[0086] In order to verify the effect of this application, the following experimental comparison data are given:

[0087] (1) In order to verify the effect of the solution of the present application in which multiple tower wheels are arranged in parallel to form a tower wheel group, the following verification test is provided:

[0088] Verification experiment 1: 8 wire drawing passes were performed using the equipment of Example 1, wherein the two pulleys 110 of the pulley assembly 10 were respectively provided with 4 wires, and the measured results were: the wire breakage rate during drawing was 6.1%, and the average length of a single reel was 267,000 meters;

[0089] Comparative experiment 1: The difference between the equipment used in comparative experiment 1 and verification experiment 1 is that: Figure 3 The segmented (8-segment) stepped tower pulley 110a shown replaces the two tower pulleys 110 of the tower pulley assembly 10, and the measured results are: the wire breakage rate during drawing is 13.9%, and the average length of a single drum is 138,000 meters;

[0090] Comparative Experiment 2: The difference between the equipment used in Comparative Experiment 2 and that used in Verification Experiment 1 is that: Figure 6A straight-tube step pulley 110 b shown replaces the two step pulleys 110 of the step pulley assembly 10 , and the measured results are: the wire breakage rate during pulling is 18.5%, and the average length of a single drum is 126,000 meters.

[0091] The above data show that the use of a pulley assembly 10 divided into two pulleys 110 for drawing can effectively reduce the wire breakage rate and increase the output length of a single reel.

[0092] (2) In order to verify the effect of the present application of arranging multiple step pulleys in parallel to form a step pulley group in more wire drawing passes, the following verification test is provided:

[0093] Verification experiment 2: The equipment used in verification experiment 2 is different from that in verification experiment 1 only in that: the number of straight-cylinder tower wheels 110 used is 3, the number of wire drawing dies 210 is 12 (12 first guide wheels 310 are set correspondingly), the first tower wheel 110 distributes 5 wires (the one close to the wire drawing die 210), the second tower wheel 110 distributes 4 wires, and the third tower wheel 110 distributes 3 wires. The measured results are: the wire breakage rate is 8.7%, and the average length of a single reel is 238,000 meters;

[0094] Verification experiment 3: The equipment used in verification experiment 3 is different from that in verification experiment 2 only in that: the number of the tower pulleys 110 used is 2, including a straight tower pulley 110b and a segmented stepped tower pulley 110a (divided into 4 sections). The straight tower pulley 110b is distributed with 4 wires (the one close to the wire drawing die 210), and the segmented stepped tower pulley 110a is distributed with 4 wires. The measured results are: the wire breakage rate during drawing is 5.9%, and the average length of a single drum is 269,000 meters.

[0095] Verification experiment 4: The equipment used in verification experiment 4 is different from that in verification experiment 2 only in that: the number of the tower pulleys 110 used is 2, both of which are segmented stepped tower pulleys 110a (divided into 4 sections), the first segmented stepped tower pulley 110a distributes 4 wires (the one close to the wire drawing die 210), and the second segmented stepped tower pulley 110a distributes 4 wires; the measured results are: the wire breakage rate during drawing is 7.9%, and the average length of a single reel is 253,000 meters;

[0096] Verification experiment 5: The equipment used in this verification experiment is different from that in verification experiment 2 only in that: the number of the tower wheels 110 used is 3, the number of the wire drawing dies 210 is 8 (the first guide wheel 310 is set correspondingly 8), the first tower wheel 110 distributes 3 wires (the one close to the wire drawing die 210), the second tower wheel 110 distributes 3 wires, and the second tower wheel 110 distributes 2 wires. The measured results are: the wire breakage rate is 4.6%, and the average length of a single reel is 292,000 meters;

[0097] Comparative experiment 3: The equipment used in this comparative experiment is different from that in the verification experiment 2 only in that a segmented (12-segment) stepped tower wheel 110a is used to replace the three tower wheels 110 of the tower wheel assembly 10. The measured results are: the wire breakage rate is 30.8%, and the average length of a single drum is 65,000 meters;

[0098] Comparative experiment 4: The equipment used in this comparative experiment is different from that in verification experiment 2 only in that a straight-cylinder tower pulley 110b is used to replace the three tower pulleys 110 of the tower pulley assembly 10. The measured results are: the wire breakage rate is 43.2% and the average length of a single drum is 42,000 meters.

[0099] The above data show that the use of a pulley assembly 10 divided into a plurality of pulleys 110 for drawing can effectively reduce the wire breakage rate and increase the output length of a single reel.

[0100] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0101] (1) The drawing tower wheel mechanism of the present application: it adopts a method of arranging multiple tower wheels in parallel to form a tower wheel group. Through the corresponding cooperation between the tower wheel group and the wire drawing die frame, 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 coefficient between the first and last passes due to an increase in the number of drawing passes, and significantly improving the single-machine drawing efficiency;

[0102] In addition, due to the winding coordination design of the tower wheel group, the drawing die frame and the first guide wheel group, multiple drawing passes are integrated together on the basis of ensuring that multiple wires are distributed on multiple tower wheels, effectively saving equipment space and wire production space.

[0103] (2) The drawing pulley provided by the present application is divided into at least Z sections with different roughness, which solves 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 improves the single-machine drawing efficiency.

[0104] In addition, it adopts a tower wheel design that is divided into at least Z sections with different roughness areas, and is coordinated with the winding design of the wire drawing die frame and the first guide wheel group. On the basis of ensuring that multiple passes of wire are distributed in various areas of the tower wheel, multiple drawing passes are integrated together, effectively saving equipment space and wire production space.

[0105] (3) In addition, the drawing tower wheel mechanism provided by the present application also combines the design of arranging multiple tower wheels in parallel 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 drawing die frame, 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, thereby 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 the single-machine drawing efficiency is significantly improved; and due to the winding cooperation design of the tower wheel structure, the drawing die frame, and the first guide wheel group, multiple drawing passes are integrated together on the basis of ensuring that multiple passes of wire are distributed on multiple tower wheels, thereby effectively saving equipment space and wire production space.

[0106] Although the terms such as tower wheel, wire drawing die frame, first guide wheel group, etc. are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

[0107] 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 it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, 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 invention.

Claims

1. A pulling tower pulley 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); the wire material is guided by the first guide wheel assembly (30), passes through the die opening of the wire drawing die (210), is wound around the step pulley (110) and is wound back around the first guide wheel assembly (30), and multiple drawing passes are performed in this reciprocating manner; 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 1, characterized in that: The step pulley (110) is a straight-cylinder step pulley (110b) and / or a segmented stepped step pulley (110a).

5. The pulling tower pulley mechanism according to any one of claims 1 to 4, 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).

6. The pulley mechanism according to claim 5, characterized in that: The second guide wheel assembly includes M second guide wheels that are arranged in one-to-one correspondence with the wire drawing dies 210 .

7. A pulling tower pulley mechanism, characterized in that: It comprises a tower wheel (110) and a wire drawing die frame (20); the wire drawing die frame (20) comprises M wire drawing dies (210); The surface of the step pulley (110) is divided into at least Z sections (113) along its axial direction; wherein the surface roughness of each section of the section (113) is different, so that the surface friction coefficient of each section of the section (113) is different; 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; and each area (113) performs at least one wire drawing pass.

8. The pulley mechanism according to claim 7, characterized in that: The surface of each section of the region (113) is coated with a different coating so that the surface roughness of each section of the region (113) is different; And / or, the surface roughness Ra of the region (113) is 0.05 to 0.

8.

9. The pulley mechanism according to claim 7, characterized in that: It also includes a first guide wheel assembly (30) disposed on a side of the wire drawing die frame (20) away from the step wheel (110); 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.

10. 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 9.

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