CN114058794A - Warm pressing process for manufacturing pressed rigging - Google Patents
Warm pressing process for manufacturing pressed rigging Download PDFInfo
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- CN114058794A CN114058794A CN202111257890.0A CN202111257890A CN114058794A CN 114058794 A CN114058794 A CN 114058794A CN 202111257890 A CN202111257890 A CN 202111257890A CN 114058794 A CN114058794 A CN 114058794A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
Abstract
The invention relates to a method for pressing and connecting a rope knot and a steel/aluminum/copper wire rope in a rigging, in particular to a warm pressing process for manufacturing a pressed rigging, and belongs to the field of steel product manufacturing. When connecting the steel/aluminum/copper wire ropes with each other, a rope knot needs to be connected at the head of the steel/aluminum/copper wire rope. The warm pressing process utilizes the characteristic that the microstructure of the high-toughness martensitic steel is austenite or austenite plus martensite dual-phase structure with lower strength when no or part of martensitic phase transformation occurs, and is easy to press, cable sections and the steel/aluminum/copper wire rope are pressed together, the pressed steel/aluminum/copper wire rope is naturally cooled to room temperature, the material undergoes martensitic phase transformation in the cooling process and is converted into a high-strength martensitic structure, the requirement of holding the steel/aluminum/copper wire rope tightly is met, and the high-strength and high-toughness requirements of the pin hole connecting end are met. Compared with the traditional method for pressing the cable joint with one hard end and one soft end, the method has the advantages that the manufacturing process of the cable joint is greatly simplified, the quality of the cable joint can be effectively reduced, and the advantages are obvious.
Description
Technical Field
The invention relates to a method for pressing and connecting a rope knot and a steel/aluminum/copper wire rope in a rigging, in particular to a warm pressing process for manufacturing a pressed rigging, and belongs to the field of steel product manufacturing.
Background
When the lifting appliance, the cable, the transmission line and the like are connected with each other by using the steel/aluminum/copper wire rope, a cable joint (the whole body formed by connecting the steel/aluminum/copper wire rope and the cable joint is called as a 'rigging') needs to be connected with the head part of the steel/aluminum/copper wire rope, one end of the cable joint grips the steel/aluminum/copper wire rope by a pressing method, and the other end of the cable joint is connected with the other steel/aluminum/copper wire rope joint by using a pin hole connection mode, so that the connection of the two steel/aluminum/copper wire ropes is realized. In order to realize that the cable node grips the steel/aluminum/copper wire rope and does not damage the steel/aluminum/copper wire rope, the cable node is required to have lower strength and good toughness under ideal conditions; in order to realize the safe service of pin-hole connection, the cable joint is required to have high strength and high toughness under ideal conditions. To realize the safe service of the rope knot, two processing methods exist at present: firstly, the integral cable joint is made into uniform strength, the strength of the cable joint cannot be too high in order to reduce the damage to a steel/aluminum/copper wire rope in the pressing process as much as possible, but the adverse effect caused by the strength is that the size of the cable joint needs to be increased in order to ensure the service safety of one end of a pin hole, so that the quality of the cable joint is increased, and the dynamic performance of the service process is obviously influenced; secondly, one end of the cable joint is made into a low-strength high-toughness material through a complex heat treatment process, and the other end of the cable joint is made into a high-strength high-toughness material (generally, the strength of the cable joint is integrally reduced, and then the strength of the pin hole end is improved through processes such as local quenching and the like). And because the strength of the transition region between the high and low ends is difficult to control accurately, the size of the transition region must be large enough to ensure the safe service of the cable joint.
Therefore, the manufacturing and pressing thought of the traditional socket is broken through, a simple and reliable novel socket pressing forming process is invented, and the matching socket material selection principle is pointed out to have important practical application value.
Disclosure of Invention
The invention aims to provide a warm-pressing process for manufacturing a pressed rigging and provides a selection principle of a matched socket material. The method specifically comprises the steps of fully utilizing the strength difference of materials before and after phase change, and utilizing the characteristic that the material has lower strength in an austenite area to carry out pressing, so that the steel/aluminum/copper wire rope is fully gripped, and meanwhile, the damage to the steel/aluminum/copper wire rope is reduced; after pressing is completed, austenite-martensite phase transformation occurs in the natural cooling process of the cable joint, the strength of the material after phase transformation is greatly improved, the strength requirement of a pin hole end can be met, and the steel/aluminum/copper wire rope is further held tightly, so that the safe service of the whole cable joint is guaranteed.
The technical scheme of the invention is as follows:
a warm pressing process for manufacturing pressed rigging comprises the following key steps:
(1) selecting a martensite steel material with the Ms point temperature lower than or slightly higher than the highest temperature which can be borne by a steel/aluminum/copper wire rope, and meanwhile, the martensite steel material has excellent impact toughness and strength meeting the service requirement of a cable joint in an air-cooled quenching state;
(2) manufacturing the cable node by using a selected martensitic steel material according to corresponding size requirements;
(3) placing the socket into a heat treatment furnace for heating, and gradually cooling to a set pressing temperature T1 after complete austenitization;
(4) taking out the socket with the temperature of T1 from the furnace, penetrating a steel/aluminum/copper wire rope into the socket, and pressing by referring to the existing normal-temperature process;
(5) and after pressing, standing the rigging in the air, and naturally cooling to room temperature to obtain a martensite structure.
The warm pressing process for manufacturing the pressed rigging is characterized in that the socket material applied to warm pressing is high-strength high-toughness martensitic steel and meets the following three conditions:
(1) the martensite steel material has excellent impact toughness in an air-cooled quenching state, can meet the requirement of the service of a cable joint, and has the Charpy impact power of more than 80J and the higher the Charpy impact power, the better the Charpy impact power;
(2) the martensite steel material has high enough strength in an air-cooled quenching state, can meet the service requirements of a cable joint pressing end and a pin hole connecting end, and has yield strength not lower than 700MPa and higher strength;
(3) the Ms point temperature of the material is lower than the highest temperature which can be borne by the steel/aluminum/copper wire rope, or is slightly higher than the highest temperature which can be borne by the steel/aluminum/copper wire rope within 50 ℃.
According to the warm pressing process for manufacturing the pressed rigging, the front cable section is processed to be in a qualified size according to design requirements, then the cable section is placed into a heat treatment furnace for heating, and air cooling is carried out after complete austenitization or forced cooling is carried out in a die to a set pressing temperature T1.
According to the warm-pressing process for manufacturing the pressed rigging, the set pressing temperature T1 is comprehensively determined by the highest temperature which can be borne by the steel/aluminum/copper wire rope and the deformation resistance of the socket material at the temperature, and the set pressing temperature T1 is higher than the temperature of the martensite phase transformation end point Mf of the material.
The warm pressing process, the pressing process and the inspection after pressing are adjusted according to the existing room temperature pressing process and inspection method or the warm pressing characteristic.
According to the warm-pressing process for manufacturing the pressed rigging, the pressed rigging section is placed in air and cooled to room temperature for use, or the whole pressed rigging is subjected to annealing treatment at the temperature of 20 ℃ below the highest temperature which can be borne by the steel/aluminum/copper wire rope, wherein the rigging consists of the steel/aluminum/copper wire rope and the rigging section.
The specific principles and mechanisms of the present invention are illustrated below:
as mentioned above, the cable joint and the steel/aluminum/copper wire rope are connected by pressing, and in order to achieve the effect that the cable joint grips the steel/aluminum/copper wire rope without causing damage to the steel/aluminum/copper wire rope, the cable joint strength is ideally required to be low. The invention provides a martensite steel material with the Ms point temperature slightly higher than the highest temperature (within 50 ℃) which can be borne by a steel/aluminum/copper wire rope or lower than the highest temperature which can be borne by the steel/aluminum/copper wire rope, the martensite steel material is firstly heated to be completely austenitized, the microstructure of the material is austenite at the moment, and then the martensite steel material is controlled and cooled to the set T1 temperature, the microstructure of the material is still austenite (or mainly austenite) at the temperature, the strength is very low, and the cable section and the steel/aluminum/copper wire rope are pressed together at the temperature, so that the purposes of tightly holding and not damaging the steel/aluminum/copper wire rope can be realized.
After the cable joint and the steel/aluminum/copper wire rope are connected through pressing at the temperature of T1, the strength of the cable joint is low, and the requirement of high strength at the pin hole end cannot be met. Aiming at the problem, the invention provides that the selected socket material is martensitic steel, the material can be transformed from austenite to martensite in a natural air-cooled state, a special process is not required to be subsequently implemented to change the microstructure of the material, and after the transformation occurs, the strength of the material can be greatly improved, so that the strength of the pin hole end can meet the application requirement. Moreover, the selected martensitic steel material provided by the invention has high strength and good toughness, and the service safety of the rigging is further ensured. In addition, for the pressing end, the strength of the material is remarkably improved after the material is cooled to room temperature after warm pressing and undergoes martensite phase transformation, and the size of the pressing end socket is further reduced, so that the weight of the socket is reduced, and the light weight is realized.
Compared with the prior art, the invention has very remarkable advantages which are mainly reflected in the following advantages and beneficial effects:
1) the process flow of the manufacturing process of the cable section can be obviously reduced: in the traditional process, the lower cable section needs to be made into a cable with one soft end and one hard end through multi-pass heat treatment, and the process flow is complex, difficult to accurately control and poor in quality stability. The rope section only needs one-time integral heat treatment;
2) the size and weight of the rope knot can be obviously reduced: in order to reduce the damage to the steel/aluminum/copper wire rope in the pressing process under the traditional process, the strength of one end of the cable joint is very low, the diameter of the pressing end of the cable joint needs to be very large to ensure the safe service of the cable joint, and the weight of the cable joint is large. According to the invention, after the cable joint is pressed and cooled, the integral phase of the cable joint is changed into a high-strength high-toughness martensite structure, and the diameter and the length of a pressed end can be greatly reduced, so that the size and the weight of the cable joint are obviously reduced.
3) The energy transition zone in the cable section can be eliminated: in the traditional process, one end of a cable joint is soft, the other end of the cable joint is hard, and a transition area with length and performance difficult to accurately control exists in the middle of the cable joint and is often used as a failure area of the cable joint. The integral cable joint is in a performance state, and a transition zone does not exist, so that the service safety of the cable joint can be obviously improved.
Drawings
FIG. 1: a warm-pressing process for manufacturing a pressed rigging, wherein a) to g) are schematic diagrams of the pressing process.
The labels in the figure are: 1 is a rope knot; 2 is a steel wire rope or an aluminum wire rope or a copper wire rope; and 3, a pressing die.
Detailed Description
In the specific implementation process, when the lifting appliance, the cable, the power transmission line and the like are connected with each other by using the steel/aluminum/copper wire rope, a rope knot needs to be connected with the head of the steel/aluminum/copper wire rope, one end of the rope knot grips the steel/aluminum/copper wire rope by a pressing method, and the other end of the rope knot is connected with the other steel/aluminum/copper wire rope knot by using a pin hole connection mode, so that the connection of the two steel/aluminum/copper wire ropes is realized. In order to realize that the cable node can hold the steel/aluminum/copper wire rope tightly and does not damage the steel/aluminum/copper wire rope, the cable node is required to have lower strength and good toughness and plasticity; in order to realize the safe service of pin-hole connection, the cable joint is required to have high strength and high toughness, so that one end of the cable joint is required to have low strength and the other end of the cable joint has high strength. According to the invention, by utilizing the characteristics that the microstructure of the high-toughness martensitic steel is austenite or austenite plus martensite dual-phase structure when no martensite phase transformation or partial martensite phase transformation occurs, the strength is lower, and the pressing is easy, the cable section and the steel/aluminum/copper wire rope are pressed together, the pressed steel/aluminum/copper wire rope is naturally cooled to room temperature, the material undergoes martensite phase transformation in the cooling process, and is converted into a high-strength martensite structure, so that the requirement of holding the steel/aluminum/copper wire rope tightly is met, and the high-strength and high-toughness requirements of the pin hole connecting end are also met.
The present invention will be described in further detail below with reference to examples.
Example 1
In this embodiment, the warm-pressing process for manufacturing the pressed rigging is as follows:
1) the pressed object is a steel wire rope which can resist the temperature of 250 ℃ at most. Firstly, cutting a steel wire rope with a specified length, and beating two ends of the steel wire rope to be smooth in edge by using a grinding wheel for later use;
2) selecting martensite steel with the Ms point temperature of 210 ℃, wherein the martensite structure strength of the material obtained in an air cooling state can reach more than 750MPa, and the Akv impact energy at room temperature is not lower than 100J;
3) using the martensite steel material, processing and manufacturing the cable joint 1 according to design requirements, and referring to fig. 1 a);
4) placing the manufactured socket 1 in a heating furnace, and heating to a complete austenitizing temperature; after the socket 1 is completely austenitized, preserving the heat for 30 minutes, taking out, cooling to the temperature of 230 ℃, placing the socket 1 in a heating furnace, preserving the heat for 30 minutes, and after the socket 1 is at uniform temperature; the microstructure of the soxhlet node 1 material at 230 ℃ is a full austenite structure, the yield strength is 150MPa, and the figure is shown in figure 1 b);
5) taking out a cable joint 1, penetrating one end of a steel wire rope 2 for pressing prepared in the first step, placing the cable joint 1 in a pressing die 3, applying 1500KN pressing force, closing the pressing die 3, and cooling to room temperature, wherein the drawing is shown in figure 1c), figure 1d), figure 1e), figure 1f) and figure 1 g);
6) repeating the steps of 2-4, taking out another cable knot 1, penetrating the other end of the steel wire rope 2 in the step 5), placing the cable knot 1 in a pressing mold 3, applying 1500KN pressing force, closing the pressing mold 3, and cooling to room temperature, wherein the steps are shown in fig. 1c), fig. 1d), fig. 1e), fig. 1f) and fig. 1 g);
7) after pressing is finished, the rigging is naturally cooled to room temperature in air, a tensile machine is placed into the rigging, tensile breaking is carried out, and breaking force meets requirements.
Example 2
In this embodiment, the warm-pressing process for manufacturing the pressed rigging is as follows:
1) the pressed object is a steel wire rope which can resist the temperature of 250 ℃ at most. Firstly, cutting a steel wire rope for pressing with a specified length, and beating two ends of the steel wire rope to be smooth in edge by using a grinding wheel for later use;
2) selecting martensite steel with the Ms point temperature of 210 ℃, wherein the martensite structure strength of the material obtained in an air cooling state can reach over 900MPa, and the Akv impact energy at room temperature is not lower than 80J;
3) using the martensite steel material, processing and manufacturing the cable joint 1 according to design requirements, and referring to fig. 1 a);
4) placing the manufactured socket 1 in a heating furnace, and heating to a complete austenitizing temperature; after the socket 1 is completely austenitized, preserving the heat for 30 minutes, taking out, cooling to 190 ℃ in a heating furnace, placing the socket 1 in the heating furnace, preserving the heat for 30 minutes, and after the socket 1 is uniform in temperature; the microstructure of the material of the cable joint 1 is austenite plus a small amount of martensite at 190 ℃, the yield strength is 250MPa, and the material is shown in figure 1 b);
5) taking out a cable joint 1, penetrating one end of a steel wire rope 2 for pressing prepared in the first step, placing the cable joint 1 in a pressing die 3, applying 2000KN pressing force, closing the pressing die 3, and cooling to room temperature, wherein the drawing is shown in figure 1c), figure 1d), figure 1e), figure 1f) and figure 1 g);
6) repeating the steps of 2-4, taking out another cable knot 1, penetrating the other end of the steel wire rope 2 in the step 5), placing the cable knot 1 in a pressing mold 3, applying 2000KN pressing force, closing the pressing mold 3, and cooling to room temperature, wherein the steps are shown in fig. 1c), fig. 1d), fig. 1e), fig. 1f) and fig. 1 g);
7) after pressing is finished, the rigging is naturally cooled to room temperature in air, a tensile machine is placed into the rigging, tensile breaking is carried out, and breaking force meets requirements.
Example 3
In this embodiment, the warm-pressing process for manufacturing the pressed rigging is as follows:
1) the pressed object is an aluminum wire rope which can resist the temperature of 160 ℃ at most. Firstly, cutting a pressing piece with a specified length, and polishing two ends of an aluminum wire rope by using a grinding wheel until the edge is smooth for later use;
2) selecting a martensitic steel with the Ms point temperature of 200 ℃, wherein the martensitic structure strength of the material obtained in an air-cooled state can reach over 900MPa, and the Akv impact energy at room temperature is not lower than 100J;
3) using the martensite steel material, processing and manufacturing the cable joint 1 according to design requirements, and referring to fig. 1 a);
4) placing the manufactured socket 1 in a heating furnace, and heating to a complete austenitizing temperature; after the socket 1 is completely austenitized, preserving the heat for 30 minutes, taking out, placing in another heat preservation furnace, preserving the heat for 30 minutes at the temperature of 150 ℃ in the heat preservation furnace, and after the socket 1 is uniformly heated; the microstructure of the material of the cable node 1 at the temperature is austenite plus a small amount of martensite, the yield strength is 300MPa, and the figure is shown in figure 1 b);
5) taking out a rope knot 1, penetrating one end of an aluminum wire rope 2 for pressing prepared in the first step, placing the rope knot 1 in a pressing die 3, applying a pressing force of 2500KN, closing the pressing die 3, and cooling to room temperature, wherein the pressing force is shown in figure 1c), figure 1d), figure 1e), figure 1f) and figure 1 g);
6) repeating the steps of 2-4, taking out another cable knot 1, threading the other end of the aluminum wire rope 2 in the step 5), placing the cable knot 1 in a pressing mold 3, applying a pressing force of 2500KN, closing the pressing mold 3, and cooling to room temperature, wherein the steps are shown in fig. 1c), fig. 1d), fig. 1e), fig. 1f) and fig. 1 g);
7) after pressing is finished, the rigging is naturally cooled to room temperature in air, and then the overall rigging is subjected to annealing treatment at 130 ℃ to eliminate part of pressing residual stress;
8) the rigging is put into a tensile machine to be broken in a stretching way, and the breaking force meets the requirement, so that the pressing method is reasonable and feasible.
Example 4
In this embodiment, the warm-pressing process for manufacturing the pressed rigging is as follows:
1) the pressed object is a copper wire rope which can resist the temperature of 280 ℃ at most. Firstly, cutting a pressing piece with a specified length, and polishing two ends of a copper wire rope by using a grinding wheel until the edge is smooth for later use;
2) selecting a martensitic steel with the Ms point temperature of 180 ℃, wherein the martensitic structure strength of the material obtained in an air-cooled state can reach more than 950MPa, and the Akv impact energy at room temperature is not lower than 120J;
3) using the martensite steel material, processing and manufacturing the cable joint 1 according to design requirements, and referring to fig. 1 a);
4) placing the manufactured socket 1 in a heating furnace, and heating to a complete austenitizing temperature; after the socket 1 is completely austenitized, preserving the heat for 30 minutes, taking out, placing in another heat preservation furnace, preserving the heat for 30 minutes at the temperature of 260 ℃ in the heat preservation furnace, and after the socket 1 is uniformly heated; the microstructure of the material of the cable node 1 at the temperature is a complete austenite structure, the yield strength is 100MPa, and the figure is shown in figure 1 b);
5) taking out a rope knot 1, penetrating one end of a copper wire rope 2 for pressing prepared in the first step, placing the rope knot 1 in a pressing die 3, applying 1000KN pressing force, closing the pressing die 3, and cooling to room temperature, wherein the drawing is shown in figure 1c), figure 1d), figure 1e), figure 1f) and figure 1 g);
6) repeating the steps of 2-4, taking out another cable knot 1, penetrating the other end of the copper wire rope 2 in the step 5), placing the cable knot 1 in a pressing mold 3, applying 1000KN pressing force, closing the pressing mold 3, and cooling to room temperature, wherein the steps are shown in fig. 1c), fig. 1d), fig. 1e), fig. 1f) and fig. 1 g);
7) after pressing is finished, the rigging is naturally cooled to room temperature in air, and then the overall rigging is subjected to annealing treatment at 200 ℃ to eliminate partial pressing residual stress;
8) the rigging is put into a tensile machine to be broken in a stretching way, and the breaking force meets the requirement, so that the pressing method is reasonable and feasible.
The embodiment result shows that compared with the traditional cable joint pressing method with one hard end and one soft end, the cable joint pressing method not only greatly simplifies the manufacturing process of the cable joint, but also can effectively reduce the quality of the cable joint and has obvious advantages. The method has universality, and can be used for manufacturing the steel/aluminum/copper wire rope rigging and can also be used for other connecting modes.
Claims (6)
1. A warm pressing process for manufacturing pressed rigging is characterized by comprising the following key steps:
(1) selecting a martensite steel material with the Ms point temperature lower than or slightly higher than the highest temperature which can be borne by a steel/aluminum/copper wire rope, and meanwhile, the martensite steel material has excellent impact toughness and strength meeting the service requirement of a cable joint in an air-cooled quenching state;
(2) manufacturing the cable node by using a selected martensitic steel material according to corresponding size requirements;
(3) placing the socket into a heat treatment furnace for heating, and gradually cooling to a set pressing temperature T1 after complete austenitization;
(4) taking out the socket with the temperature of T1 from the furnace, penetrating a steel/aluminum/copper wire rope into the socket, and pressing by referring to the existing normal-temperature process;
(5) and after pressing, standing the rigging in the air, and naturally cooling to room temperature to obtain a martensite structure.
2. The warm-pressing process for manufacturing a pressed rigging according to claim 1, wherein the socket material applied to warm pressing is high-strength high-toughness martensitic steel, and the following three conditions are satisfied:
(1) the martensite steel material has excellent impact toughness in an air-cooled quenching state, can meet the requirement of the service of a cable joint, and has the Charpy impact power of more than 80J and the higher the Charpy impact power, the better the Charpy impact power;
(2) the martensite steel material has high enough strength in an air-cooled quenching state, can meet the service requirements of a cable joint pressing end and a pin hole connecting end, and has yield strength not lower than 700MPa and higher strength;
(3) the Ms point temperature of the material is lower than the highest temperature which can be borne by the steel/aluminum/copper wire rope, or is slightly higher than the highest temperature which can be borne by the steel/aluminum/copper wire rope within 50 ℃.
3. The warm pressing process for manufacturing pressed rigging according to claim 1, wherein the front socket is processed to an acceptable size according to design requirements, and then the socket is placed in a heat treatment furnace for heating, air cooling after complete austenitization or forced cooling in a die to a set pressing temperature T1.
4. Warm-pressing process for manufacturing pressed rigging according to claim 1, wherein the set pressing temperature T1 is determined by a combination of the highest temperature that the steel/aluminum/copper wire rope can withstand and the deformation resistance of the socket material at that temperature, and must be higher than the temperature of the martensitic transformation end point Mf of the material.
5. The warm compaction process for making compacted rigging according to claim 1, wherein the compaction process and post-compaction inspection are adjusted according to existing room temperature compaction processes and inspection methods, or according to warm compaction characteristics.
6. Warm-pressing process for making pressed rigging according to claim 1, wherein the pressed rigging is ready for use after the knot is left to stand in air to cool to room temperature, or the whole pressed rigging is annealed at a temperature not higher than 20 ℃ below the highest temperature that the steel/aluminum/copper wire rope can bear, wherein the rigging is composed of the steel/aluminum/copper wire rope and the knot.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117361303A (en) * | 2023-11-23 | 2024-01-09 | 无锡海峡索具钢绳有限公司 | Multi-wire rope crimping cable joint |
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| 魏朋花: ""压制钢丝绳索具分类及应用"", 《金属制品》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117361303A (en) * | 2023-11-23 | 2024-01-09 | 无锡海峡索具钢绳有限公司 | Multi-wire rope crimping cable joint |
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|---|---|
| CN114058794B (en) | 2022-11-22 |
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