CN109396184B

CN109396184B - Two-roller triangular rolling mill for manufacturing copper strip by using oxygen-free copper rod, production line and production process

Info

Publication number: CN109396184B
Application number: CN201811385532.6A
Authority: CN
Inventors: 林旭娜; 林建光
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-11-20
Filing date: 2018-11-20
Publication date: 2020-03-31
Anticipated expiration: 2038-11-20
Also published as: CN109396184A

Abstract

The invention discloses a two-roller triangular rolling mill for manufacturing a copper strip by using an oxygen-free copper rod, a production line and a production process. The technical scheme adopted comprises the following steps: the rolling mill comprises an upper roller and a lower roller which are horizontally arranged, wherein one of the upper roller and the lower roller is provided with a male triangular rolling surface, and the other roller is provided with a female triangular rolling surface matched with the male triangular rolling surface. The advantages are as follows: 1. at least one triangular rolling process is adopted to realize the rapid rolling and thinning of the copper rod, so that the rolling of the copper rod can be completed before the temperature of the copper rod is lower than 500 ℃; 2. the copper strip manufactured by using the oxygen-free copper rod has the advantages of oxygen-free, smooth and bright surface, good crystallization and good stability, and is completely suitable for hardware punching parts (such as wiring terminals and the like); 3. the product has high mass density and no loss of metallographic phase; 4. the cost is low (about 100 yuan per ton of natural gas is heated, about 30 yuan per ton of electricity is charged, about 800 yuan per ton of copper rod is charged, about 300 yuan per ton of other copper rod is charged, and the overall cost is about 1230 yuan per ton); 5. the investment is less, the labor is less, the energy is saved, and the yield of one production line per shift (8 hours per day) is about 60 tons.

Description

Two-roller triangular rolling mill for manufacturing copper strip by using oxygen-free copper rod, production line and production process

Technical Field

The invention relates to a copper strip two-roller triangular rolling mill manufactured by an oxygen-free copper rod, a production line and a production process, and belongs to the field of metal processing.

Background

The existing method for producing copper strips is to put copper rods into an extruder (represented by a large continuous production extruder), the extrusion wheel is driven by power to rotate in the direction, when a copper rod blank enters the groove of the extrusion wheel, the copper rod blank is guided into an extrusion cavity formed by the extrusion wheel and a die cavity under the action of friction force of a grooved wheel, and a copper section is extruded under the action of high pressure and high temperature generated by the friction force because a material blocking block prevents the copper material from continuously advancing. In addition, the traditional extruding machine can not produce the copper strip with the thickness of less than 3.5mm, if the copper strip with the thickness of less than 3.5mm is produced, the copper strip needs to be continuously thinned in a cold rolling mode, and the vacuum annealing is needed after the cold rolling. The production cost (the cold extrusion cost is about 400 yuan, the vacuum annealing cost is about 300 yuan, the raw material cost is about 800 yuan, and the other costs are about 500 yuan, and the overall cost is about 2500 yuan) is very high, and the yield is low (the yield per shift of one production line is about 15 tons).

The search shows that the production process for manufacturing the copper strip by using the oxygen-free copper rod by using a hot rolling method does not exist at present, the traditional hot rolling process is mainly used for rolling a large copper ingot, and the copper ingot is thinned by repeatedly rolling back and forth. However, this process is not suitable for the production of copper strip of relatively thin thickness, mainly because: the traditional two-roll plane rolling mill has low rolling efficiency, the copper rod can be rolled to the thickness meeting the requirement after 5-8 times, the temperature of the copper rod with small volume is reduced rapidly in the rolling process, and the temperature of the copper rod is lower than 500 ℃ after 2-3 times of rolling, so that the copper rod cannot be rolled continuously. And even if the temperature problem can be solved, because long-time rolling, the copper strips surface can form thicker oxide layer, and the copper strips produced still need polishing and grinding, and its manufacturing cost is also very high, and polishing and grinding can cause the loss to the copper material.

Disclosure of Invention

The invention aims to solve the technical problem of providing a two-roller triangular rolling mill for manufacturing a copper strip by using an oxygen-free copper rod, a production line and a production process.

In order to solve the above problems, the technical scheme adopted by the invention comprises: the upper roll and the lower roll which are horizontally arranged are characterized in that: one of the upper roller and the lower roller is provided with a male triangular rolling surface, and the other roller is provided with a female triangular rolling surface matched with the male triangular rolling surface.

The two-roller triangular rolling mill is characterized in that the angle α of the male triangular rolling surface and the female triangular rolling surface is 130-150 degrees, and the height H of the male triangular rolling surface and the female triangular rolling surface is 1-3 cm.

The two-roll triangular rolling mill is characterized in that: and a positioning groove is arranged on the female triangular rolling surface.

The utility model provides an oxygen-free copper pole preparation copper strips production line which characterized in that: the production line mainly comprises a heating furnace, a No. 1 rolling mill, a No. 2 rolling mill, a cleaning tank and a winding machine, wherein at least the No. 2 rolling mill utilizes the two-roller triangular rolling mill.

Oxygen-free copper pole preparation copper strips production line, its characterized in that: the production line also comprises a No. 3 rolling mill, wherein the No. 3 rolling mill is a two-roll plane rolling mill or a two-roll triangle rolling mill utilizing the two-roll plane rolling mill.

Oxygen-free copper pole preparation copper strips production line, its characterized in that: the production line also comprises an induced draft fan, and the induced draft fan is used for introducing the flue gas exhausted after the heating furnace is heated and combusted into the No. 1 rolling mill and the No. 2 rolling mill at least to separate oxygen protection for the copper strip.

The production process for manufacturing the copper strip by using the oxygen-free copper rod is realized according to the production line, and is characterized by comprising the following steps:

step 1: taking an oxygen-free copper rod with the diameter of 8mm-32mm, putting the oxygen-free copper rod into a heating furnace, and heating to 700-800 ℃;

step 2: the heated oxygen-free copper rod is conveyed to a No. 1 rolling mill and a No. 2 rolling mill through a conveying mechanism to be rolled in sequence, and the temperature of the copper strip is kept above 500 ℃ in the rolling process;

and step 3: conveying the rolled copper strip to a cleaning tank for high-pressure washing;

and 4, step 4: and winding the cleaned copper strip by a winding machine.

The production process for manufacturing the copper strip by using the oxygen-free copper rod is characterized by comprising the following steps of: the step 2 also comprises a No. 3 rolling mill, wherein the No. 3 rolling mill is a two-roller plane rolling mill and is used for carrying out flat rolling on the conveyed copper strip.

The production process for manufacturing the copper strip by using the oxygen-free copper rod is characterized by comprising the following steps of: and in the step 3, high-pressure washing is carried out by using alcohol with the concentration of 8-15%.

The production process for manufacturing the copper strip by using the oxygen-free copper rod is characterized by comprising the following steps of: and in the rolling process of the step 2, introducing smoke discharged after the heating furnace is heated and combusted into the induced draft fan to perform oxygen isolation protection on the copper strip.

The two-roller triangular rolling mill, the production line and the production process have the advantages that:

1. at least one triangular rolling process is adopted to realize the rapid rolling and thinning of the copper rod, so that the rolling of the copper rod can be completed before the temperature of the copper rod is lower than 500 ℃;

2. the copper strip manufactured by using the oxygen-free copper rod has the advantages of oxygen-free, smooth and bright surface, good crystallization and good stability, and is completely suitable for hardware punching parts (such as wiring terminals and the like);

3. the product has high mass density and no loss of metallographic phase;

4. the cost is low (about 100 yuan per ton of natural gas is heated, about 30 yuan per ton of electricity is charged, about 800 yuan per ton of copper rod is charged, about 300 yuan per ton of other copper rod is charged, and the overall cost is about 1230 yuan per ton);

5. the investment is less, the labor is less, the energy is saved, and the yield of one production line per shift (8 hours per day) is about 60 tons.

The invention is further described below with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic view of the roll configuration of a two roll delta mill of the present invention;

FIG. 2 is a flow chart of the copper strip production process of the present invention;

FIG. 3 is a schematic cross-sectional view of a copper strip rolled by a two-roll triangular rolling mill according to the present invention.

Detailed Description

Example 1:

referring to fig. 1, the two-roll triangular rolling mill for manufacturing copper strips by using oxygen-free copper rods comprises an upper roll 1 and a lower roll 2 which are horizontally arranged, wherein a male triangular rolling surface 3 is arranged on the upper roll 1, a female triangular rolling surface 4 matched with the male triangular rolling surface 3 is arranged on the lower roll 2, the diameters of the sections of the upper roll 1 and the lower roll 2 are 200mm-400mm, preferably 300mm, the lengths of the upper roll 1 and the lower roll 2 are 200mm, the angle α of the male triangular rolling surface 3 and the female triangular rolling surface 4 is 130-170 degrees, preferably 155 degrees, the height H of the male triangular rolling surface 3 and the female triangular rolling surface 4 is 1cm-3cm, preferably 2 cm., the width W of the male triangular rolling surface 3 and the female triangular rolling surface 4 is 3cm-10cm, preferably 5 cm., the parameters are optimal data for producing the copper strips with the specifications commonly used in the market at present time, and are not limited by the invention, and can be adjusted adaptively according to the specifications of the copper strips.

Furthermore, a positioning groove 5 is arranged on the female triangular rolling surface 4 and used for positioning the copper strip, so that the straight running of the copper strip is ensured, and meanwhile, the width of the copper strip rail can be limited. And a tugboat can be arranged behind the roller of the two-roller triangular rolling mill according to requirements and is used for flattening the rolled triangular copper strip.

The copper strip two-roll triangular rolling mill for manufacturing the oxygen-free copper rod mainly aims at the improvement of the roller, and other structures of the rolling mill are all known technologies and are not described herein.

Example 2:

referring to fig. 2, the production line for manufacturing the copper strip by using the oxygen-free copper rod mainly comprises a heating furnace 6, a No. 1 rolling mill 7, a No. 2 rolling mill 8, a cleaning tank 9 and a winding machine 10, wherein at least the No. 2 rolling mill 8 utilizes a two-roll triangular rolling mill described in embodiment 1. Because the oxygen-free copper rod is of a cylindrical structure, the positioning is difficult, a two-roll plane rolling mill (a rolling mill with two flat roll surfaces) is usually adopted for the No. 1 rolling mill 7, and if the positioning problem is solved, a two-roll triangle rolling mill can also be directly adopted for the No. 1 rolling mill 7. The structures of the heating furnace 6, the cleaning tank 9 and the winding machine 10 are well known technology, and are not described in detail herein.

Further, the production line further comprises a 3 # rolling mill 11, and the 3 # rolling mill 11 is a two-roll flat rolling mill or the two-roll triangular rolling mill of embodiment 1. If the copper strip is small square, rolling can be directly finished by using a No. 1 rolling mill 7 and a No. 2 rolling mill 8, and if the copper strip is large square, further rolling can be carried out by using a No. 3 rolling mill 11. In addition, when a small copper bar (such as 6cm in width and 6mm in thickness) needs to be produced, the No. 2 rolling mill is lifted and stopped, and the production can be finished by directly utilizing the No. 1 rolling mill and the No. 3 rolling mill.

Example 3:

referring to fig. 2 to 3, the production process of the copper strip made of the oxygen-free copper rod is realized according to the production line described in embodiment 2, and the production process comprises the following steps:

step 1: the method comprises the steps of preparing a conventional oxygen-free copper rod with the diameter of 8-32 mm into a single-layer spiral shape, putting the single-layer spiral shape into a heating furnace 6, heating to 700-800 ℃ (most understood as 750 ℃), wherein the heating furnace is heated by burning natural gas, and the length of each roll of the single-layer spiral conventional oxygen-free copper rod is about 200 meters.

Step 2: the heated conventional oxygen-free copper rod is conveyed to a No. 1 rolling mill 7 and a No. 2 rolling mill 8 through a conveying mechanism to be rolled in sequence, the temperature of the conventional oxygen-free copper rod is kept above 500 ℃ in the rolling process, the No. 1 rolling mill 7 adopts a two-roller plane rolling mill to carry out flat rolling on the conventional oxygen-free copper rod, the conventional oxygen-free copper rod can be rolled into a copper bar with the thickness of 5mm-14mm generally, the No. 2 rolling mill 8 adopts a two-roller triangular rolling mill to carry out triangular rolling on the copper bar, and the copper bar can be rolled into a copper bar with the thickness of 1.5mm-3 mm. Before rolling, lubricating oil is coated on the rollers of a No. 1 rolling mill 7 and a No. 2 rolling mill 8 to prevent the copper strip from being adhered to the rollers.

And step 3: and conveying the rolled copper strip to a cleaning tank 9 for high-pressure washing, specifically, carrying out high-pressure washing on the surface of the copper strip by using 8-15% alcohol to remove impurities (mainly cokes formed by lubricating oil due to high temperature) attached to the surface of the copper strip.

And 4, step 4: and winding the cleaned copper strip by a winding machine 10.

Further, step 2 still includes rolling mill 11 No. 3, rolling mill 11 No. 3 is two roll plane rolling mills, carries out the flat rolling to the copper strips that comes to the transmission, finally produces smooth copper strips to the punching press production of follow-up hardware.

Furthermore, in the rolling process of the step 2, a draught fan 12 is used for introducing the flue gas discharged after the heating and combustion of the heating furnace 6 to the periphery of the copper strip, so as to perform oxygen insulation protection on the copper strip. Because the heating furnace 6 adopts natural gas for heating and burning, the discharged gas is abortive gas and surrounds the copper strip, so that the oxygen-isolating protection of the copper strip can be realized, the surface oxidation of the copper strip is prevented, and the discharged gas can be subjected to waste utilization, thereby being environment-friendly and energy-saving.

Although the present invention has been described with reference to the above embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a copper strips two roll triangular rolling mill of oxygen-free copper pole preparation, includes top roll (1), bottom roll (2) that the level set up, its characterized in that: a male triangular rolling surface (3) is arranged on one of the upper roller (1) and the lower roller (2), a female triangular rolling surface (4) matched with the male triangular rolling surface (3) is arranged on the other roller, and a positioning groove (5) is formed in the female triangular rolling surface (4) so as to realize rapid rolling and thinning of the oxygen-free copper rod and ensure that the copper rod is rolled before the temperature of the copper rod is lower than 500 ℃.

2. The two-roll triangular rolling mill for the copper strip made of the oxygen-free copper rods as claimed in claim 1, wherein the angle α of the male triangular rolling surface (3) and the female triangular rolling surface (4) is 130-170 degrees, and the height H of the male triangular rolling surface (3) and the female triangular rolling surface (4) is 1cm-3 cm.

3. The utility model provides an oxygen-free copper pole preparation copper strips production line which characterized in that: the production line is mainly composed of a heating furnace (6), a No. 1 rolling mill (7), a No. 2 rolling mill (8), a cleaning bath (9) and a winding machine (10), wherein at least the No. 2 rolling mill (8) utilizes the two-roll triangular rolling mill according to any one of claims 1-2.

4. The production line of the copper strip made of the oxygen-free copper rod as claimed in claim 3, is characterized in that: the production line further comprises a number 3 rolling mill (11), the number 3 rolling mill (11) being a two roll face rolling mill or a two roll delta rolling mill utilizing any of claims 1-2.

5. The production line of the copper strip made of the oxygen-free copper rod as claimed in claim 3, is characterized in that: the production line also comprises an induced draft fan (12) for introducing the flue gas discharged after the heating and combustion of the heating furnace (6) into the No. 1 rolling mill (7) and the No. 2 rolling mill (8) at least to separate oxygen for protecting the processed materials.

6. The utility model provides an oxygen-free copper pole preparation copper strips production technology, the production line mainly comprises heating furnace (6), 1 rolling mill (7), 2 rolling mill (8), washing tank (9) and rolling machine (10), wherein, at least 2 rolling mill (8) including last roll (1), bottom roll (2) that the level set up, be equipped with on one of them roll of top roll (1), bottom roll (2) the public triangle roll surface (3), be equipped with on another roll with public triangle roll surface (3) complex female triangle roll surface (4), its characterized in that, production technology step as follows:

step 1: taking an oxygen-free copper rod with the diameter of 8mm-32mm, putting the oxygen-free copper rod into a heating furnace (6), and heating to 700-800 ℃;

step 2: the heated oxygen-free copper rod is conveyed to a No. 1 rolling mill (7) and a No. 2 rolling mill (8) through a conveying mechanism to be rolled in sequence, and the temperature of the copper strip is kept above 500 ℃ in the rolling process;

and step 3: conveying the rolled copper strip to a cleaning tank (9) for high-pressure washing;

and 4, step 4: and (4) winding the cleaned copper strip by a winding machine (10).

7. The production process of the copper strip made of the oxygen-free copper rod as claimed in claim 6, wherein the production process comprises the following steps:

the step 2 also comprises a No. 3 rolling mill (11), wherein the No. 3 rolling mill (11) is a two-roller plane rolling mill and is used for carrying out flat rolling on the conveyed copper strip.

8. The production process of the copper strip made of the oxygen-free copper rod as claimed in claim 6, wherein the production process comprises the following steps:

and in the step 3, high-pressure washing is carried out by using alcohol with the concentration of 8-15%.

9. The production process of the copper strip made of the oxygen-free copper rod as claimed in claim 6, wherein the production process comprises the following steps:

and in the rolling process of the step 2, introducing the flue gas discharged after the heating and combustion of the heating furnace (6) by using an induced draft fan (12) to perform oxygen isolation protection on the copper strip.