High-pressure molten paraffin lubricating process for steel wire drawing processing
By using high-pressure fused paraffin for lubrication in wire drawing processing, the problem of difficult to achieve uniform coating of solid lubricating materials at micron level is solved, efficient lubrication of the steel wire surface is achieved, friction and wire breaking phenomenon is reduced, and the product is improved Quality and production stability.
Patent Information
- Application Number
- CN202411878510.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-02-11
AI Technical Summary
In the existing wire drawing processing technology, it is difficult for solid lubricating materials to achieve uniform micron-level coating on the surface of the wire, resulting in uneven friction and broken wire problems, affecting production stability and product quality.
High-pressure fused paraffin is used as the lubricating medium, and high-pressure liquid paraffin is applied to the surface of the steel wire, and the spiral pressurization structure of the lubricating equipment and the design of the coating head are used to achieve efficient lubrication of the steel wire surface.
It effectively reduces friction during steel wire processing, reduces wire breakage, improves the finish and corrosion resistance of the finished product, and enhances production stability and product quality.
Smart Images
Figure CN119406949A_ABST
Abstract
Description
Technical Field
[0001] The patent of this invention relates to the field of steel wire drawing processing, and in particular refers to a high-pressure molten paraffin lubrication process for steel wire drawing processing. This lubrication process can reduce friction, reduce wire breakage, improve the smoothness of the finished product, reduce the roughness of the finished product, and improve the corrosion resistance of the finished product during the steel wire processing process. Background Art
[0002] At present, the wire drawing process is mainly used in the steel wire processing. In this process, there is a great friction and cutting force between the steel wire and the drawing die, which affects the local stress, surface roughness, surface continuity and surface finish of the steel wire in the drawing die section. Among them, these forces will also cause wire drawing damage, local surface cracking, sub-surface cracks, wire breakage, etc. on the steel wire surface, which seriously affects the production stability and product quality level of steel wire drawing processing.
[0003] Usually, solid materials such as carbon powder and wax blocks are used for surface coating and lubrication during the wire drawing process to reduce the friction of the wire surface during the drawing process, thereby improving the surface quality and production stability of the wire processing. However, it is difficult to achieve micron-level lubrication coverage on the wire surface using solid lubricating materials, including powdered lubricating materials; this is an inevitable problem due to the size limitation of solid particles. Solid and granular lubricating materials are difficult to achieve uniform coating on the wire surface, especially difficult to infiltrate the fine grooves and tiny ridges at the microscopic size of the wire. These areas that cannot be well coated will cause local stress instability in the area during the drawing process, resulting in uneven stress within the stress section range of the drawing die, thus causing strain, tearing, scratches, streamlines, and even wire breakage during the drawing process. Among them, the lack of good coating of small grooves causes low stress levels and reduced friction levels in the local area during the drawing process, thereby inducing the formation of surface cracks; the lack of good coating of small ridge structures causes increased stress levels and increased friction levels in the local area during the drawing process, thereby inducing surface strain and cracking of the cross-section at the front of the ridge.
[0004] Compared with the coating of solid and granular materials, liquids can achieve a much higher coverage level than the former due to their wettability and fluidity. Liquids can achieve coverage of flat surfaces under the action of tension, and the continuity of liquids ensures that the liquid coverage efficiency is still continuous at the microscopic level. For small grooves and tiny raised structures, in addition to relying on tension to achieve the wetting and covering effect on such structures, liquids can also achieve good wetting and covering effects with the assistance of high pressure as mentioned in the patent of this invention.
[0005] After the paraffin is cooled, the paraffin that has been wetted and covered at the microscopic level has good adhesion to the covered area, which can ensure good and complete coverage of the steel wire during the subsequent drawing process, storage process, and transportation process, as well as the resulting good lubrication performance and corrosion protection. This also makes liquid lubrication have a process effect and economic value far higher than solid and particle lubrication processes. Invention patent content
[0006] The technical problem to be solved by the patent of this invention is to provide a high-pressure molten paraffin lubrication process for steel wire drawing processing, which mainly adopts high-pressure, molten paraffin as the lubricating medium, and uses lubrication equipment to coat the high-pressure liquid paraffin on the surface of the steel wire, and controls the coating amount, mechanism sealing, and coating size with high universality.
[0007] The lubricating equipment is fed with solid paraffin, which is heated to liquid state by the heating chamber structure in the lubricating equipment, and the liquid paraffin is conveyed and pressurized by the spiral pressurizing structure, and the high-pressure liquid paraffin enters the coating head. The coating head is hollow inside and has a wire threading hole, through which the steel wire enters the coating head and contacts with the high-pressure liquid paraffin, and then the steel wire continues to run to the subsequent process.
[0008] The threading hole structure of the coating head is a double-layer structure, and the inner and outer structures are replaceable plates with threading holes, inlet chamfers, and outlet cones. The inner structure contacts the liquid paraffin, the cavity part in the double-layer structure is used to store hardened and solidified paraffin, and the outer structure of the double-layer structure is used to fix the paraffin solidified in the cavity part.
[0009] The sealing of the coating head structure adopts paraffin self-sealing technology. After the paraffin contacts the relatively low temperature surface of the steel wire, the temperature of the liquid paraffin drops below the melting point and then solidifies, thereby relying on the solidification phenomenon of the paraffin itself to achieve self-sealing technology for the liquid paraffin in the lubrication equipment.
[0010] By replacing the coating head structure, different coating head structures have wire threading holes of different sizes and inner and outer sealing structures, so as to realize the lubrication process and universality for steel wires of different sizes and specifications.
[0011] The lubricating coating head structure has a cover plate on the outside to prevent the liquid paraffin from overflowing during the drawing shutdown process. During the shutdown and restart process of the lubricating equipment, due to the lubricating effect of the paraffin itself, the paraffin solid state startup, paraffin solid state threading, and early non-liquid lubrication can be achieved.
[0012] The above is an example implementation scheme of the present invention. It should be pointed out that, unless otherwise defined, the technical terms or scientific terms used in the present invention should have the usual meanings understood by persons with ordinary skills in the field described in the present invention. For ordinary technicians in this technical field, several improvements and transformation schemes can be made without departing from the principles described in the present invention, and these improvements and transformation schemes should also be regarded as the protection scope of the present invention.
[0013] The disclosure of the present invention provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described in the present invention. Of course, they are only examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but a person of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.
[0014] The following describes the embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments or technical solutions of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings in the description only show certain embodiments of the present invention and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.
[0016] Figure 1 This is a schematic diagram of a high-pressure molten paraffin lubrication process for wire drawing implemented by the patent of this invention.
[0017] Among them, 1-feeding port, 2-heating chamber, 3-heating wire, 4-spiral pressurizing structure, 5-flow guide pipe, 6-coating head, 7-wire threading hole, 8-motor, 9-slag discharge port. DETAILED DESCRIPTION
[0018] The following will be combined with the embodiments to clearly and completely describe the technical solution of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.
[0019] It should be understood that in the description of the embodiments of the present invention, all directional indication terms, such as "up", "down", "left", "right", "front", "back", etc., indicate the orientation or position relationship based on the orientation, position relationship shown in the drawings or the orientation or position relationship in which the invention patent product is usually placed when in use. It is only for the convenience of simplifying the description of the present invention, and does not expressly or implicitly indicate that the device, element or component referred to must have a specific orientation and a specific orientation structure, and should not be understood as a limitation on the present invention. It is only used to explain the relative position relationship, movement, etc. between the components shown in the drawings. When the specific posture changes, the directional indication may also change accordingly.
[0020] In the present invention patent, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation", "screw-on" and the like should be understood in a broad sense. For example, the positional relationship between components can be relatively fixed, or there can be a physically fixed connection between components; it can be a detachable connection, or an integrated structure; it can be a mechanical connection or an electrical signal connection; it can be a direct connection or an indirect connection through an intermediate medium or component; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined in the specification, other understandings may not achieve the corresponding functions or effects. For ordinary technicians in this field, the specific meanings of the above terms in the present invention patent can be understood according to specific circumstances.
[0021] The following describes the embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.
[0022] See also Figure 1 , the present invention provides an embodiment and technical solution:
[0023] like Figure 1 As shown, a possible embodiment and method of using the technical solution corresponding to a high-pressure molten paraffin lubrication process for wire drawing processing implemented by the patent of the present invention are as follows:
[0024] According to the diameter of the steel wire raw material to be drawn, a coating head of suitable specifications is selected and installed to the installation port of the diversion pipe. The steel wire is threaded through the coating head and the steel wire conveying is temporarily stopped. The solid paraffin is quickly fed into the heating chamber through the feeding port. The solid paraffin is heated up to liquid paraffin through the heating wire in the heating chamber. The spiral pressurizing structure driven by the motor is pressurized and conveyed to the diversion pipe. At this time, the liquid paraffin is in a high-pressure state and flows into the coating head and contacts the steel wire in the coating head. The steel wire conveying operation is started, and the steel wire passes out from the coating head carrying the paraffin coated on the surface of the steel wire and forms a solid paraffin layer of suitable thickness.
[0025] The shutdown operation of the lubrication equipment is to stop the spiral pressurizing structure, cancel the high pressure and delivery source of the liquid paraffin in the coating head, stop heating, and stop wire delivery.
[0026] The restart operation of the lubrication equipment is to thread the steel wire through the coating head, then stop the steel wire feeding, start the heating operation, and start the spiral pressurizing structure. Initially, semi-solid paraffin will be used for lubrication. After liquid paraffin is replenished to the coating head, high-pressure liquid paraffin will be used for lubrication.
[0027] Recover excess paraffin before the first drawing die after the lubrication equipment and return the paraffin to the heating furnace of the lubrication equipment. Regularly open the bottom slag discharge port of the heating chamber for slag discharge operation.
[0028] The above is only an embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.
Claims
1. A high-pressure molten paraffin lubrication process for steel wire drawing, characterized in that: The lubricating medium used in the steel wire drawing process is molten liquid paraffin. The paraffin is made into a high-pressure molten state by heating and pressurizing, and then coated on the surface of the steel wire.
2. A high-pressure molten paraffin lubrication process for steel wire drawing, characterized in that: The lubricating medium used in the wire drawing process is high-pressure liquid paraffin, and the high pressure improves the wettability of the paraffin.
3. A high-pressure molten paraffin lubrication process for steel wire drawing, characterized in that: The temperature of the liquid paraffin during the heating and coating process is from the melting point of the paraffin to the melting point of the paraffin plus 50°C.
4. A high-pressure molten paraffin lubrication process for steel wire drawing, characterized in that: The lubricating device comprises a feeding port (1), a heating chamber (2), a heating wire (3), a motor (8), a spiral pressurizing mechanism (4), a flow guide pipe (5), a coating head (6), a slag discharge port (9), a wire threading hole (7), and a covering plate. The lubricating device is divided into a normal pressure zone and a high pressure zone.
5. A high-pressure molten paraffin lubrication process for steel wire drawing, characterized in that: The coating head (6) structure adopts the paraffin self-sealing technology, which relies on the fact that after the paraffin contacts the relatively low-temperature steel wire surface, the temperature of the liquid paraffin drops below the melting point and then solidifies, thereby relying on the solidification phenomenon of the paraffin itself to achieve the self-sealing technology of the liquid paraffin in the lubricating equipment.
6. A high-pressure molten paraffin lubrication process for steel wire drawing, characterized in that: The sealing layer of the coating head (6) structure is a double-layer structure with a middle cavity, the inner structure contacts the liquid paraffin, the cavity part in the double-layer structure is used to store hardened and solidified paraffin, and the outer structure of the double-layer structure is used to fix the paraffin solidified in the cavity part.
7. A high-pressure molten paraffin lubrication process for steel wire drawing, characterized in that: The inner and outer structures of the sealing layer of the coating head (6) structure have threading holes (7) and inlet chamfers and outlet conical structures.
8. A high pressure molten paraffin lubrication process for steel wire drawing, characterized in that: The bottom of the heating chamber (2) is provided with a slag discharge port (9) structure, and the location of the slag discharge port (9) is a normal pressure zone.
9. A high-pressure molten paraffin lubrication process for steel wire drawing, characterized in that: The coating head (6) realizes a detachable connection function with the lubrication equipment through a threaded structure or a snap-fit structure, and a sealing member is installed between the two.