Multi-pass wire drawing equipment

Abstract

The invention relates to the technical field of drawing equipment, in particular to multi-pass wire drawing equipment. The multi-pass wire drawing equipment comprises a drawing cone pulley mechanism and a heating furnace, 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 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 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 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 multi-pass wire drawing device, and its technical solution is as follows:

[0008] The multi-pass wire drawing equipment includes a drawing tower wheel mechanism and a heating furnace for heating each pass of wire; the drawing tower wheel mechanism includes a tower wheel group, a drawing die frame and a first guide wheel group 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; 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 to the first guide wheel group, and multiple passes of drawing 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 performs at least one wire drawing pass.

[0009] In some embodiments, when the tower wheel structure is a tower wheel group, 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 step pulley is a straight-cylinder step pulley and / or a segmented stepped step pulley.

[0011] In some embodiments, the tower wheel group includes a segmented stepped tower wheel; a second guide wheel group is provided between the tower wheel group and the drawing die frame; the second guide wheel group includes M second guide wheels arranged in one-to-one correspondence with the drawing dies.

[0012] The multi-pass wire drawing equipment includes a drawing tower wheel mechanism and a heating furnace for heating each pass of wire; the 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.

[0013] 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.

[0014] In some embodiments, the heating furnace includes a furnace shell and a heating component disposed in a furnace chamber of the furnace shell; the heating component includes Y heating components with independent temperature control settings, where Y is greater than or equal to.

[0015] In some embodiments, the heating assembly is detachably connected to the furnace shell.

[0016] In some embodiments, each of the heating components includes a heating wire body and a temperature sensing component for measuring temperature; the heating wire body and the temperature sensing component are both connected to a control system.

[0017] In some embodiments, each of the heating wire bodies extends along the axial direction of the wire material, so that Y of the heating wire bodies are arranged in parallel in the furnace; the heating wire bodies are located above the wire material and / or below the wire material. In some embodiments, a glass tube is provided on the outside of the heating wire body; there is a gap between the glass tube and the heating wire body, and the gap can be used to fill gas.

[0018] In some embodiments, the inner furnace chamber of the furnace shell is filled with protective gas.

[0019] In some embodiments, it also includes a tension control mechanism for adjusting the tension of the wire; the heating furnace is arranged between the wire drawing die frame and the first guide wheel group, and the tension control mechanism is arranged on the side of the first guide wheel group away from the wire drawing die frame; wherein, the wire passes through the tension control mechanism and the first guide wheel group in turn, and then passes through the furnace of the heating furnace and the drawing die of the wire drawing die frame in turn, and is then wound around the tower wheel structure, and multiple drawing passes are performed reciprocatingly.

[0020] Compared with the prior art, 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 It is a top view of the existing multi-pass drawing equipment using a single heating wire heating furnace;

[0031] Figure 8 It is a three-dimensional diagram of the existing multi-pass drawing equipment using a single heating wire heating furnace;

[0032] Fig. 9 A front view of the multi-pass drawing apparatus provided in Example 1;

[0033] Fig.10 A top view of the multi-pass drawing apparatus provided in Example 1;

[0034] Fig.11 A three-dimensional diagram of a multi-pass drawing apparatus provided in Example 1;

[0035] Fig.12 It is a top view of the tower wheel assembly and the wire drawing die frame in Example 1;

[0036] Fig.13 It is a three-dimensional diagram of the tower wheel assembly and the wire drawing die frame in Example 1;

[0037] Fig.14 is a top view of the heating furnace in Example 1;

[0038] Fig.15 is a three-dimensional diagram of the heating furnace in Example 1;

[0039] Fig.16 is a three-dimensional diagram of the tension control mechanism in Example 1;

[0040] Fig.17 It is a top view of the tower wheel assembly and the wire drawing die frame in Example 2;

[0041] Fig.18 It is a three-dimensional diagram of the tower wheel assembly and the wire drawing die frame in Example 2;

[0042] Fig.19 It is a top view of the tower wheel assembly and the wire drawing die frame in Example 3;

[0043] Fig. 20 It is a three-dimensional diagram of the tower wheel assembly and the wire drawing die frame in Example 3;

[0044] Fig.21 is a front view of the heating furnace in Example 4;

[0045] Fig. 22 is a top view of the heating furnace in Example 4;

[0046] Fig.23 is a three-dimensional diagram of the heating furnace in Example 4;

[0047] Fig.24 This is a schematic diagram of the structure of the heating wire assembly in Example 5;

[0048] Fig.25 It is a schematic diagram of the structure of the heating wire assembly in Examples 6-8;

[0049] Fig.26 A top view of a multi-pass drawing device for a heating wire assembly in Example 9;

[0050] Fig. 27 is a top view of the step pulley in Example 9;

[0051] Fig.28 This is a top view of the tower wheel and the drawing die frame in Example 10.

[0052] Reference numerals:

[0053] 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 body, 113 area, 113a first area, 113b second area, 113c third area, 210 wire drawing die, 310 first guide wheel, 410 furnace shell, 420 heating component, 430 furnace chamber, 440 glass tube, 421 heating wire body, 422 temperature measuring point, 510 tension adjustment component, 511 support wheel, 512 pressure wheel, 112a segmented stepped tower wheel, 112b straight cylinder tower wheel, 1 first temperature zone, 2 second temperature zone, 3 third temperature zone, 4 fourth temperature zone, 5 fifth temperature zone, 6 sixth temperature zone, 7 seventh temperature zone, 8 eighth temperature zone, 9 ninth temperature zone. DETAILED DESCRIPTION

[0054] 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.

[0055] 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.

[0056] The present invention provides Figure 9-16 Embodiment 1, Figure 17-18 Embodiment 2, Figure 19-20 Example 3, Example 21-23 Example 4, Fig.24 Embodiment 5, Fig.25 A multi-pass wire drawing device shown in Examples 6-8 includes a drawing tower wheel mechanism, a heating furnace 40 and a tension control mechanism 50 for adjusting the wire tension.

[0057] For the pulley mechanism

[0058] Design of the pulley mechanism:

[0059] like Figure 9-16 Embodiment 1, Figure 17-18 Embodiment 2, Figure 19-20 As shown in Example 3, the drawing tower wheel mechanism for multi-pass drawing includes a tower wheel group 10, a drawing die frame 20 and a first guide wheel group 30 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.

[0060] Specifically, Figure 9-16As 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.

[0061] 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.

[0062] 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, and distributes multiple passes of wire materials on multiple tower wheels 110 through the corresponding cooperation between the tower wheel group 10 and the drawing die frame 20, and the winding cooperation between the first guide wheel group 30 and the tower wheel group 10. Since each independent tower wheel 110 can independently adjust the rotation speed, the problem of wire breakage caused by excessive difference in sliding coefficients of the first and last passes due to an increase in the number of drawing passes is solved, and the single-unit drawing efficiency is improved;

[0063] In addition, due to the winding matching design of the tower wheel group 10, the drawing die frame 20, and the first guide wheel group 30, multiple drawing passes are integrated together on the basis of ensuring that multiple wires are distributed on multiple tower wheels 110, effectively saving equipment space and wire production space.

[0064] 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.

[0065] Preferably, if Figure 9-16 Embodiment 1, Figure 17-18 Embodiment 2, Figure 19-20 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 .

[0066] Preferably, if Figure 9-16 Embodiment 1, Figure 17-18Embodiment 2, Figure 19-20 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 .

[0067] like Figure 9-16 Embodiment 1, Figure 17-18 Embodiment 2, Figure 19-20 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.

[0068] 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.28 In the staggered design of the tower pulley 110 shown in Example 10, 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 next tower pulley 110 can pass through the groove of the previous tower pulley 110, including but not limited to the embodiment scheme.

[0069] Preferably, if Figure 9-16 Embodiment 1, Figure 17-18 Embodiment 2, Figure 19-20 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.

[0070] 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.

[0071] Preferably, the step pulley 110 is a straight-cylinder step pulley 112b and / or a segmented stepped step pulley 112a.

[0072] like Figure 9-16 Embodiment 1, Figure 17-18 Embodiment 2, Figure 19-20 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.

[0073] 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.

[0074] 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.

[0075] Design 2 for the pulling tower wheel mechanism:

[0076] like Figure 26-27 As shown in Example 9, it includes a tower wheel 110 and a wire drawing die frame 20; the wire drawing die frame 20 includes M wire drawing dies 210; 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 is subjected to at least one wire drawing pass.

[0077] Preferably, it also includes a first guide wheel group 30 arranged on the side of the drawing die frame 20 away from the tower wheel 110; 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.

[0078] Specifically, Figure 26-27 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.

[0079] 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 9, 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.

[0080] In summary, in the drawing tower wheel mechanism of the present invention, the tower wheel 110 is designed to be divided into at least Z-segment 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-segment 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.

[0081] 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.

[0082] 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.

[0083] Preferably, if Figure 26-27 As shown in Example 9, 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;

[0084] Preferably, the first guide wheel assembly 30 includes M first guide wheels 310 arranged one by one with the wire drawing die 210. When in use, each pass of wire is equipped with a first guide wheel 310, which separates each pass, facilitates line alignment and wire buffering for each pass, and is convenient and practical.

[0085] It should be noted that:

[0086] 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 9. 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 9;

[0087] In the descriptions herein that “the step pulley 110 is divided into at least Z segment areas 113 along its axial direction” and “N step pulleys 110 are staggered along its axial direction”, the axial direction refers to the rotating axis of the step pulley 110 .

[0088] 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 coating different coatings. Similarly, according to the above design concept, existing coatings other than the above aluminum oxide coating, zirconium oxide coating, WC 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.

[0089] For the combination of pull-out tower wheel mechanism design 1 and pull-out tower wheel mechanism design 2:

[0090] In addition, in the scheme of forming a step pulley group 10 using N parallel arranged step pulleys 110, according to the above design concept, the step pulley 110 in the above step pulley group 10 can also be set as a Z-segment area 113 with different roughness to further improve the single-unit drawing efficiency and drawing quality.

[0091] like Figure 9-16 Embodiment 1, Fig.28 As shown in Example 10, 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 performs at least one wire drawing.

[0092] 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.28 In Embodiment 10, a step pulley 110 is configured as a Z-segment region 113 with different roughness.

[0093] For heating furnace 40:

[0094] like Figure 7-8As shown, currently, a single heating wire / tube is used for heating in the heating furnace of the sliding multi-pass drawing device. When a single heating wire is arranged for heating, the temperature in the middle of the furnace is slightly higher. Affected by heat exchange, the actual temperature at the edge is lower. The temperature difference in each area of ​​the furnace is large and cannot be adjusted, thus affecting the quality of the wire;

[0095] It is well known to those skilled in the art that, from the first pass to the last pass, the wire diameter specifications of the wire material increase from coarse to fine, and the multi-mode wire drawing of the wire material is hot drawing. The wire drawing conditions have strict requirements on temperature control and regulation, and the process requirements for heating temperature of the coarse-gauge wire material and the fine-gauge wire material are inconsistent. Due to the design of heating by the above-mentioned single heating wire / tube, when the wire material is heated, the deformation force deviation of the wire material is large during the die drawing process, which leads to serious wire breakage.

[0096] In order to solve the above problems, the following heating furnace 40 structure is designed:

[0097] like Figure 9-16 Example 1, Example 21-23 Example 4, Fig.24 Embodiment 5, Fig.25 As shown in Examples 6-8, the multi-pass drawing heating furnace 40 includes a furnace shell 410 and a heating component arranged in a furnace chamber 430 of the furnace shell 410; the heating component includes Y heating components 420 with independent temperature control settings, and Y is greater than or equal to 2. Preferably, each of the heating components 420 includes a heating wire body 421 and a temperature sensing component for measuring temperature; the heating wire body 421 and the temperature sensing component are electrically connected to a control system. Preferably, each of the heating wire bodies 421 extends along the threading direction of the wire material, so that the heating wire bodies 421 are arranged in parallel in the furnace chamber 430, and the heating wire bodies 421 are located above the wire material and / or below the wire material.

[0098] Specifically, the heating furnace 40 adopts a heating component 420 with independent temperature control, and a plurality of (greater than or equal to 2) heating wire bodies 421 are designed in parallel to control the temperature, replacing the Figure 7-8 The original single-strand heating wire is used to control the temperature of the heating furnace 40 independently. Fig. 22 As shown, each independently temperature-controlled heating component 420 has an independent temperature sensing element, and the heating wire body 421 of each heating component 420 has at least one independent temperature measuring point 422 to perform temperature sensing and feedback on the heating wire body 421 of the heating component 420 .

[0099] By adopting the solution of the present invention, the temperature of the heating wire body 421 of the heating assembly 420 with independent temperature control can be changed according to actual temperature requirements, and heating control can be performed at different positions of the furnace 430 of the heating furnace 40:

[0100] Compared with Figure 7 The heating furnace 40 shown in the figure adopts a solution that a heating wire is bent and arranged in the entire space of the furnace 430. The temperature of each area of ​​the entire furnace 430 is greatly different. In particular, the temperature of the same wire near the entrance and exit of the furnace 430 is significantly lower than that of the middle area. The design of the heating component 420 of the present invention can improve the temperature uniformity of each section of each wire in the furnace 430 when each wire is in the furnace 430, reduce the temperature difference between the middle and the entrance and exit of the wire, and reduce the temperature difference of the wire. Figure 8 The conventional furnace 430 shown has a problem of large temperature differences.

[0101] At the same time, since the specifications of the wires in each pass are different, and the process requirements for heating temperature of thick-gauge wires and thin-gauge wires are inconsistent, the use of Y heating components 420 with independent temperature control settings can control multiple heating components 420 at different temperatures, which can meet the temperature gradient design requirements of multi-mode wire drawing, thereby effectively improving the production quality of wires. Figure 9-16 As shown in Example 1, the present application adopts a parallel design of four heating components 420. The wires passing through the components 420 are in different passes, and each heating component 420 can be set to a different temperature to meet the heating temperature requirements of the wires passing through the components 420 at different passes.

[0102] In summary, the above design is adopted: designing multiple heating components with independent temperature control settings, the temperature of the heating component can be changed according to actual temperature requirements, heating control can be performed at different positions of the heating furnace, the temperature uniformity in the furnace can be effectively improved, and at the same time, the temperature gradient design requirements of multi-mode wire drawing can be met, thereby effectively improving the wire production quality.

[0103] It should be noted that:

[0104] The phrase "each of the heating wire bodies 421 extends along the axial direction of the wire material, so that Y of the heating wire bodies 421 are arranged in parallel in the furnace 430" is used herein to indicate that the extending direction of each heating wire body 421 is consistent with the threading direction (axial direction) of the wire material, and its extending direction forms a quasi-parallel state with the wire material, and several heating wire bodies 421 form a quasi-parallel state with each other; however, it does not mean that the heating wire body 421 is a straight line, nor does it mean that several heating wire bodies 421 have the same shape, and the shapes may be the same or different, for example, some are continuous arc-shaped, and some are continuous sawtooth-shaped, and the extending directions of several heating wire bodies 421 may be parallel;

[0105] The heating wire body 421 is preferably disposed above the wire and / or below the wire; for example Figure 9-16 As shown in Example 1, all the heating wire bodies 421 are arranged above the wire material; Figure 21-23 As shown in Example 4, all the heating wire bodies 421 are arranged below the wire material; according to the above design concept, a design in which a part of the heating wire bodies 421 are arranged above the wire material and a part of the heating wire bodies 421 are arranged below the wire material can also be adopted, including but not limited to the embodiment scheme.

[0106] In this embodiment 1, the heating wire body 421, the temperature sensing element and the control system are connected to form temperature feedback and control: the temperature sensing element senses the temperature of the temperature measuring point 422 and feeds back to the control system, and the control system controls the heating wire body 421 to adjust the temperature; this feedback and control process is a prior art, and its principles and mechanisms will not be repeated.

[0107] Preferably, if Figure 9-16 Example 1, Example 21-23 Example 4, Fig.24 Embodiment 5, Fig.25 As shown in Examples 6-8, the heating assembly 420 is detachably connected to the furnace shell 410 .

[0108] The heating component 420 is detachably connected to the furnace shell 410. When in use, people can adjust the heating temperature by changing the number of heating components 420, the diameter of each heating wire body 421, the bending amplitude, the spacing between bending peaks and troughs, and the number of bending peaks (number of turns). The temperature can be adjusted by changing the number of heating components 420 or the shape and structure of the heating components 420 themselves. The flexibility is strong, so that heating control can be performed at different positions of the furnace 430, which can effectively improve the temperature uniformity in the furnace 430 and meet the temperature gradient design requirements of multi-mode wire drawing.

[0109] Preferably, if Figure 9-16 Example 1, Example 21-23 Example 4, Fig.24 Embodiment 5, Fig.25 As shown in Examples 6-8, the shape of the heating wire body 421 is one or more combinations of an arc shape, a sawtooth shape, a shaved tooth shape, a continuous arc shape, a continuous sawtooth shape, and a continuous shaved tooth shape.

[0110] It should be noted that: Figure 9-16 As shown in Example 1, the heating wire body 421 is a continuous arc-shaped structure; Fig.25 From top to bottom are Examples 6-8, Example 6 is a continuous sawtooth shape, Example 7 is a continuous shaved tooth shape, and Example 8 is a shape formed by a combination of an arc shape, a sawtooth shape, and a shaved tooth shape; based on the above design concept, the heating wire body 421 can also be designed in other shapes and structures, including but not limited to the above schemes.

[0111] Preferably, if Fig.24As shown in Example 5, the heating wire body 421 is sheathed with a glass tube 440. Preferably, there is a gap between the glass tube 440 and the heating wire body 421, and the gap can be used to fill gas. Preferably, the glass tube 440 is made of a heat-resistant glass material. Preferably, the glass tube 440 is made of a high-temperature resistant quartz glass material.

[0112] like Fig.24 As shown in Example 5, since a glass tube 440 is provided on the outside of the heating wire body 421, the heat radiated by the heating wire body 421 is diffused in the gas between the glass tube 440 and the heating wire body 421. By adopting the above structural design, the heating temperature of the heating component 420 is more uniform and the temperature control is more precise, and the wire is heated more evenly and precisely.

[0113] Preferably, as shown in Example 4 of 21-23, the internal furnace chamber 430 of the furnace shell 410 is filled with a protective gas. Preferably, the protective gas is one or more combinations of nitrogen, helium, neon, argon, xenon, and radon.

[0114] As shown in Example 4 of 21-23, the furnace shell 410 is set to be a flip-cover type, which is convenient and practical. When in use, after the flip cover of the furnace shell 410 is closed, the furnace chamber 430 is filled with protective gas, which can provide atmosphere protection for the wire heating process to improve the wire production quality.

[0115] For the tension control mechanism 50 for adjusting the wire tension:

[0116] When using the existing sliding drawing device for production, no matter whether the tower wheel style is segmented stepped or straight, when drawing high-strength tungsten wire exceeding 5500Mpa, due to the higher deformation resistance of the wire, it is very easy to cause the wire to shake during drawing, which increases the friction between the wire and the tower wheel and causes frequent wire breakage. At the same time, it is also very easy to wear the surface of the tower wheel, thereby continuously worsening the wire breakage.

[0117] In addition, the current high-strength multi-mode multi-pass wire drawing process has high drawing strength and large drawing force, which causes the wire to shake violently, resulting in serious wear on one side of the die. The pulling force before entering the die is relatively small, and the wire drawing after passing the die is affected by the friction inside the die. The pulling force after passing the die is relatively large, and there is a problem of large differences in pulling force between each die sequence. At the same time, in the multi-mode wire drawing process, the pulling force between each die sequence is inconsistent, which will cause wire accumulation problems, thereby causing wire breakage.

[0118] In order to solve the above problems, a tension control mechanism 50 for adjusting the wire tension is designed as follows:

[0119] The multi-pass wire drawing equipment includes a tension control mechanism 50 for adjusting the wire tension, a heating furnace 40, and a drawing pulley mechanism; the drawing pulley mechanism includes a pulley structure, a drawing die frame 20 and a first guide wheel group 30, and the pulley structure includes a pulley 110; the heating furnace 40 is arranged between the drawing die frame 20 and the first guide wheel group 30, and the tension control mechanism 50 is arranged on the side of the first guide wheel group 30 away from the 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 430 of the heating furnace 40 and the drawing die 210 of the drawing die frame 20 in turn, it is wound on the pulley 110, and is wound back to the tension control mechanism 50 for the next drawing, and multiple drawing is performed reciprocatingly.

[0120] Preferably, the tension control mechanism 50 comprises a tension detection component for detecting the tension of the wire and a tension adjustment component 510 for adjusting the tension of the wire; the tension detection component and the tension adjustment component 510 are both electrically connected to a control system.

[0121] A tension control mechanism 50 is provided at the front end of the first guide wheel assembly 30, so that the tension control mechanism 50 can adjust the tension of the wire: specifically, the tension detection component detects the tension of the wire and feeds back to the control system, and the control system controls the tension adjustment component 510 to adjust the tension of the wire. By adding the above-mentioned tension feedback system and tension adjustment structure, the pre-die and post-die tension control of the wire can be realized, and the problem of difficult tension matching between the die sequences in the multi-die wire drawing process can be improved, thereby improving the production quality of the wire;

[0122] The tension control mechanism 50 with wire buffering function is added to solve the problem of large die consumption of the wire drawing die 210, rapid wear of the tower wheel 110 and frequent wire breakage caused by the high deformation resistance of high-strength wire (such as tungsten wire) during the drawing process, which causes the wire to shake.

[0123] Preferably, the tension adjustment assembly 510 includes two support wheels 511 and a pressure wheel 512 disposed above the middle of the two support wheels 511; wherein the height of the pressure wheel 512 is adjustable, and the control system adjusts the tension of the wire by controlling the pressure wheel 512 to rise or fall.

[0124] like Figure 9-16 As shown in Example 1, when in use, the tension adjustment component 510 of the above structure is used to adjust the pressure of the pressure wheel 512 on the wire by controlling the pressure wheel 512 to rise or fall, thereby adjusting the tension of the wire.

[0125] It should be noted that, based on the above concept, those skilled in the art may adopt existing tension controllers, such as magnetic powder tension controllers (whose principles and structures are existing and will not be described here), including but not limited to the above schemes.

[0126] Preferably, each of the wire drawing dies 210 is provided with a tension control mechanism (50). Preferably, each of the tension control mechanisms 50 is provided with a tension detection component and a tension adjustment component 510, and each tension adjustment component 510 independently adjusts the tension of the wire.

[0127] Each of the wire drawing dies 210 is provided with a tension control mechanism 50, and each tension control mechanism 50 is provided with a tension detection component and a tension adjustment component 510, so that the tension adjustment component 510 corresponding to each wire can adjust the tension of the wire independently, for example, the tension adjustment component of the pressure wheel 512 type, the pressure wheel 512 of each wire can independently control its height to adjust the tension independently. Such a design makes the tension adjustment of the wire more flexible.

[0128] In summary, the above design is adopted: in the multi-pass wire drawing equipment, a tension control mechanism is designed to adjust the tension of the wire: by adding the tension control mechanism, the pre-die and post-die tension control of the wire can be achieved, and the problem of difficult tension matching between the modes in the multi-mode wire drawing process is improved, thereby improving the wire production quality; the present invention adds a tension control mechanism with a wire passing buffer function to the multi-pass wire drawing equipment, so as to solve the problem of large wire drawing die consumption, fast tower wheel wear and frequent wire breakage caused by the large deformation resistance of the high-strength wire during the drawing process.

[0129] Preferably, if Figure 9-16 As shown in the embodiment 1, it also includes a reeling mechanism 60, which is used to release the first pass of wire material.

[0130] Preferably, if Figure 9-16 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.

[0131] It should be noted that:

[0132] The control system is a prior art, for example, a PLC controller can be used, which has a programmable memory for storing programs inside, executing user-oriented instructions such as logical operations, sequential control, timing, counting and arithmetic operations, and controlling various types of machinery or production processes through digital or analog input / output. It is a prior art, and the working principle is not repeated here. The tension detection component and tension adjustment component 510 are also existing devices. The working principle of the process of tension detection, feedback and adjustment in cooperation with the control system is a prior art, and it is not repeated here.

[0133] In order to verify the effect of this application, the following experimental comparison data are given:

[0134] (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:

[0135] 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;

[0136] 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;

[0137] Comparative Experiment 2: The difference between the equipment used in Comparative Experiment 2 and that used in Verification Experiment 1 is that: Figure 6 A 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.

[0138] 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.

[0139] (2) In order to verify the effect of the heating furnace of this application, the following verification test is provided:

[0140] Comparative experiment three: test Figure 7-8 The internal temperature uniformity of the heating furnace 40 is shown, wherein Figure 7 As shown, the temperature difference between the first temperature zone, the second temperature zone and the third temperature zone is 62°C; the temperature difference between the fourth temperature zone, the fifth temperature zone and the sixth temperature zone is 54°C; the temperature difference between the seventh temperature zone, the eighth temperature zone and the ninth temperature zone is 66°C.

[0141] Verification experiment 2: Using Figure 9-16 The heating furnace 40 shown in Example 1 was tested for temperature uniformity, wherein Fig.14 As shown, the furnace 430 is divided into 9 temperature zones which are the same as those in comparative experiment 3. The temperature difference between the first temperature zone, the second temperature zone and the third temperature zone is 27°C; the temperature difference between the fourth temperature zone, the fifth temperature zone and the sixth temperature zone is 18°C; the temperature difference between the seventh temperature zone, the eighth temperature zone and the ninth temperature zone is 22°C.

[0142] The above data show that the heating scheme of the present invention can effectively ensure the temperature uniformity of the heating area, thereby ensuring the temperature uniformity of each wire in the middle and inlet and outlet parts of the furnace 430.

[0143] (3) In order to verify the effect of adding a glass tube 440 to the outside of the heating wire body 421 of the present application, the following verification test is provided:

[0144] Verification Experiment Three: The only difference between the equipment used in this experiment and that in Verification Experiment Two is that the heating wire body 421 of Verification Experiment Three is sheathed with a temperature-resistant glass tube 440. The measured data are: the temperature difference between the first temperature zone, the second temperature zone and the third temperature zone is 15°C; the temperature difference between the fourth temperature zone, the fifth temperature zone and the sixth temperature zone is 9°C; the temperature difference between the seventh temperature zone, the eighth temperature zone and the ninth temperature zone is 17°C.

[0145] The above data show that heating uniformity can be further improved by adding a glass tube 440 outside the hot wire body 421.

[0146] (4) In order to verify the effect of the present application of using a plurality of step pulleys arranged in parallel to form a step pulley group in the drawing of more wires, the following verification test is provided:

[0147] Verification experiment 4: The equipment used in verification experiment 4 is different from that in verification experiment 1 only in that: the number of straight-cylinder-type 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;

[0148] Verification experiment 5: The equipment used in verification experiment 5 is different from that in verification experiment 4 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 is 5.9%, and the average length of a single drum is 269,000 meters.

[0149] Verification experiment 6: The equipment used in verification experiment 6 is different from that in verification experiment 4 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;

[0150] Verification experiment seven: The equipment used in this verification experiment is different from that in verification experiment four 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;

[0151] Comparative experiment 4: The equipment used in this comparative experiment is different from that in verification experiment 4 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;

[0152] Comparative experiment 5: The equipment used in this comparative experiment is different from that in verification experiment 4 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.

[0153] 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.

[0154] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0155] (1) The drawing tower wheel mechanism of the present invention 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 materials 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 significantly improving the single-machine drawing efficiency;

[0156] 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.

[0157] (2) The drawing tower pulley mechanism of the present invention is designed to be 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.

[0158] (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.

[0159] (3) The present invention designs a plurality of heating components with independent temperature control settings, and the temperature of the heating components can be changed according to actual temperature requirements. The heating can be controlled at different positions of the heating furnace, which can effectively improve the temperature uniformity in the furnace. At the same time, it can meet the temperature gradient design requirements of multi-mode wire drawing, thereby effectively improving the wire production quality.

[0160] (4) The present invention designs a tension control mechanism in a multi-pass wire drawing device to adjust the tension of the wire: by adding a tension control mechanism, the tension control of the wire before and after the die can be achieved, and the problem of difficult tension matching between the die sequences in the multi-die wire drawing process can be improved, thereby improving the quality of wire production;

[0161] The present invention adds a tension control mechanism with a wire buffering function to the multi-pass wire drawing equipment to solve the problem of large wire drawing die consumption, rapid tower wheel wear and frequent wire breakage caused by large wire deformation resistance and wire shaking during the drawing process.

[0162] Although the terms such as tower wheel assembly, wire drawing die frame, first guide wheel assembly, 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.

[0163] 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 multi-pass wire drawing device, comprising a drawing tower wheel mechanism and a heating furnace (40) for heating each pass of the wire; characterized in that: The drawing step pulley mechanism comprises a step pulley assembly (10), a wire drawing die frame (20) and a first guide pulley 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 multi-pass wire drawing device 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 multi-pass wire drawing device 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).

4. The multi-pass wire drawing apparatus according to claim 1, characterized in that: The step pulley assembly (10) comprises a segmented stepped step pulley (110a); A second guide wheel group is provided between the step wheel group (10) and the wire drawing die frame (20); the second guide wheel group includes M second guide wheels which are arranged in a one-to-one correspondence with the wire drawing dies 210.

5. A multi-pass wire drawing device, comprising a drawing tower wheel mechanism and a heating furnace (40) for heating each pass of the wire; characterized in that: The tower wheel mechanism 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.

6. The multi-pass wire drawing apparatus according to claim 5, characterized in that: It also includes a first guide wheel assembly (30) arranged 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.

7. The multi-pass wire drawing equipment according to claim 1 or 5, characterized in that: The heating furnace (40) comprises a furnace shell (410) and a heating component arranged in a furnace chamber (430) of the furnace shell (410); the heating component comprises Y heating components (420) with independent temperature control settings, where Y is greater than or equal to 2.

8. The multi-pass wire drawing apparatus according to claim 7, characterized in that: The heating component (420) is detachably connected to the furnace shell (410); And / or, each of the heating components (420) comprises a heating wire body (421) and a temperature sensing component for measuring temperature; and the heating wire body (421) and the temperature sensing component are both connected to a control system.

9. The multi-pass wire drawing apparatus according to claim 8, characterized in that: Each of the heating wire bodies (421) extends along the axial direction of the wire material, so that Y heating wire bodies (421) are arranged in parallel in the furnace (430); the heating wire bodies (421) are located above the wire material and / or below the wire material; and / or, The heating wire body (421) is sheathed with a glass tube (440); a gap is provided between the glass tube (440) and the heating wire body (421), and the gap can be used to fill gas; and / or, The inner furnace chamber (430) of the furnace shell (410) is filled with protective gas.

10. The multi-pass wire drawing equipment according to claim 1 or 6, characterized in that: Also included is a tension control mechanism (50) for adjusting the tension of the wire; The heating furnace (40) is arranged between the wire drawing die frame (20) and the first guide wheel group (30), and the tension control mechanism (50) is arranged on a side of the first guide wheel group (30) away from the wire drawing die frame (20); The wire passes through the tension control mechanism (50) and the first guide wheel group (30) in sequence, and then passes through the furnace (430) of the heating furnace (40) and the drawing die (210) of the drawing die frame (20) in sequence, and is then wound around the tower wheel structure, and multiple drawing passes are performed repeatedly.

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