CN102382954B - On-line continuous quenching device for skew-rolled ball-milled steel balls - Google Patents

Abstract

The present invention provides an on-line continuous quenching device for skew-rolled ball-milled steel balls, which comprises the following components: a variable-frequency control motor, a decelerator, a coupling, a rotating wheel, a wheel hub, a ribbed plate, a shaft, a bearing support, a material inlet chute, a material outlet chute and a water tank. Stepless variable-frequency speed regulation of the variable-frequency control motor realizes stepless is realized through a variable-frequency control system for accurately controlling speed of the rotating wheel. The decelerator and the variable-frequency control motor act together for reducing the rotation speed of the runner to 0.2-3RPM. The coupling connects an output shaft of the speed reducer with the shaft which is equipped on the bearing support. The rotating wheel is used for driving the steel ball into quenching medium for quenching. A material inlet chute and a material outlet chute are provided at two sides of the shaft. The on-line continuous quenching device for skew-rolled ball-milled steel balls has the following beneficial effects: capability of performing on-line heat treatment for the steel balls; no effect for original production capability of a ball rolling machine; continuous production; capability of utilizing waste heat after rolling of the steel ball for performing continuous quenching for saving energy; continuous quenching after rolling of the steel ball for realizing after-rolling deformation heat-treatment of the steel balls for improving product quality; accurate time control, stable process, low noise and high automation degree.

Description

An on-line continuous quenching device for skew rolling ball milling steel balls

technical field

The invention belongs to the technical field of metal plastic forming technology and equipment, and in particular provides an on-line continuous quenching device for cross-rolling ball milling steel balls, which is suitable for continuously quenching steel balls by utilizing waste heat of cross-rolling ball milling steel balls .

Background technique

Ball milling steel balls are widely used for grinding various ores and other materials, and are widely used in industries such as mineral processing, cement and thermal power generation. my country's iron ore, copper mine, cement mine, power generation and other ores use more than 3 billion tons, and more than 2 million tons of steel balls are needed.

Steel ball manufacturing methods mainly include forging, casting, rolling and other production processes. Steel balls produced by rolling method have the advantages of high production efficiency, 60~180 steel balls per minute, material utilization rate as high as 98%, high dimensional accuracy, low cost and good quality. It is an advanced ball milling steel ball. Production Process. The milled steel balls after rolling generally need to be quenched to improve the hardness and wear resistance of the steel balls.

Contents of the invention

The invention provides a device for continuous quenching by using the residual heat of cross-rolled and milled steel balls. A quenching machine is added behind the steel ball rolling mill, and the waste heat after steel ball rolling is used for quenching without heating, saving energy. In addition, continuous quenching is carried out by using the waste heat after steel ball skew rolling, which can realize deformation heat treatment after steel ball rolling, and can improve product quality.

The technical solution of the present invention is: an on-line continuous quenching device for steel balls in cross-rolling ball mills. The supporting steel ball quenching equipment and ball rolling machine used form a continuous operation production line, which can conduct online heat treatment on steel balls without affecting the original quality of the ball rolling machine. Production capacity, used for online quenching heat treatment of Φ20~80mm hot-rolled ball milling steel balls, and can also be used for quenching heat treatment of steel balls above Φ80mm.

The technical solution of the present invention is: an on-line continuous quenching device for skew rolling ball milling steel balls, the device includes a frequency conversion control motor, a reducer, a coupling, a runner, a wheel hub, a rib plate, a shaft, a bearing seat, a feeding chute, discharge chute and water tank;

Wherein, the frequency conversion control motor realizes the stepless frequency conversion speed regulation of the motor by the frequency conversion control system, so as to accurately control the speed of the runner, and then realize accurate temperature control as required;

The speed reducer and the frequency conversion control motor work together to reduce the speed of the runner to between 0.2 and 3 RPM;

The coupling couples the output shaft of the reducer with the shaft mounted on the bearing seat;

The runner is used to drive the steel balls into the quenching medium for quenching, and the steel balls are taken out of the water tank; the runner is installed on the shaft through the hub, and the ribs are arranged around it for reinforcement; The runner consists of a steel ring, a baffle, a partition and a web; the web is welded to one end of a plurality of partitions equidistantly arranged, and the other end of the partition is welded to the baffle, and 10-20 steel rings are evenly distributed along the axial direction of the spoke plate, welded on the separator, the gap between the steel rings is not less than 3/4 of the steel ball diameter d, the hub welding the central position of said web;

The feed chute and the discharge chute are arranged on both sides of the shaft, and the installation height of the feed chute is lower than the axis line of the runner, and is aligned with the axis line of the runner. The included angle is α; the distance Li between the feed chute and the partition plate is greater than the radius r of the steel ball; the installation height of the discharge chute is lower than the axis line of the runner, The included angle of the center line is β, and the distance Lo between the discharge chute and the partition is smaller than the steel ball radius r;

The water tank is used to store the quenching medium; the runner is placed in the water tank, the inner wall length Lp of the water tank is greater than the diameter Dz of the runner, the inner wall width W is greater than the width Wz of the runner, and the depth Hp greater than the radius Rz of the runner; the water tank is welded with steel plates or built with cement materials.

Further, the diameter of the web is 1-3 meters; and there are 30-50 through holes with a diameter of 80-200mm for increasing the fluidity of water in the compartment of the runner.

Furthermore, 20-40 holes with a diameter of 50-100 mm are uniformly distributed along the circumference of the baffle plate for increasing the fluidity of water in the compartment of the runner.

The advantages of the present invention are:

1) The supporting steel ball quenching equipment adopted in the present invention forms a continuous production line with the ball rolling machine, which can conduct on-line heat treatment on the steel balls, without affecting the original production capacity of the ball rolling machine, and can realize continuous production;

2) Use the waste heat after steel ball rolling for continuous quenching to save energy;

3) Continuous quenching after steel ball rolling can realize deformation heat treatment after steel ball rolling and improve product quality;

4) It has the advantages of precise time control, stable process, low noise and high degree of automation.

Description of drawings

Fig. 1 is a schematic structural diagram of an on-line continuous quenching device for skew-rolled ball milling steel balls of the present invention.

Fig. 2 is an enlarged schematic diagram of the structure and installation position of the feeding chute of the present invention.

Fig. 3 is an enlarged schematic diagram of the structure and installation position of the discharge chute of the present invention.

Fig. 4 is an enlarged schematic diagram of the structural installation position of the discharge chute of the present invention in the direction of the front view.

Fig. 5 is a schematic left view of the installation position of the water tank and the runner.

Figure 6 is a schematic diagram of the front view of the installation position of the water tank and the runner

Fig. 7 is a schematic structural view of the runner of the present invention.

Fig. 8 is a schematic structural view of the baffle of the present invention.

Fig. 9 is a schematic structural view of the web of the present invention.

In the picture:

1. Frequency conversion control motor, 2. Reducer, 3. Coupling, 4. Runner, 5. Shaft, 6. Bearing seat, 7. Feed chute, 8. Discharge chute, 9. Water trough, 10. Steel Circle, 11. baffle plate, 12. clapboard, 13. spoke plate, 14. wheel hub, 15. rib plate. the

Detailed ways

The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figures 1-7, the present invention is an on-line continuous quenching device for skew rolling ball milling steel balls . Feed chute 7, discharge chute 8, water tank 9 hub 14 and rib 15;

Wherein, runner 4 is made up of steel ring 10, baffle plate 11, partition plate 12, web plate 13; Web plate 13 is welded with one end of a plurality of partition plates 12 equidistantly, and the other end of partition plate 12 is connected with baffle plate 11 Welding, 10-20 steel rings are evenly distributed along the axial direction of the web plate, welded on the separator 12, and the gap between the steel rings is not less than 3/4 of the steel ball diameter d;

The frequency conversion control motor 1 is connected with the reducer 2, and the output shaft of the reducer 2 is connected with the bearing 5 installed on the bearing seat 6 through the coupling 3; the runner 4 is installed on the shaft 5 through the hub 14, and the hub 14 is surrounded by There are ribs 15 for reinforcement; the feeding chute 7 and the discharging chute 8 are arranged on both sides of the shaft 5 in the runner 4, and the installation height of the feeding chute 7 is lower than the axis line of the runner 4, and is connected with the runner 4 The included angle of the axis line is α; the distance Li between the feeding chute 7 and the partition plate 12 is greater than the radius r of the steel ball; the installation height of the discharge chute 8 is lower than the axis line of the runner 4, and the The included angle of the axis line of 4 is β, and the distance Lo between the discharge chute 8 and the partition 12 is smaller than the radius r of the steel ball; the runner 4 is placed in the water tank 9, and the length Lp of the inner wall of the water tank is greater than the diameter Dz of the runner, The width W is greater than the width Wz of the runner, and the depth Hp is greater than the radius Rz of the runner.

FIG. 8 is a schematic structural diagram of the baffle plate of the present invention. The baffle plate 11 is evenly distributed along the circumference with 20-40 holes with a diameter of 50-100 mm, which are used to increase the fluidity of water in the runner 4 compartments.

FIG. 9 is a schematic structural view of the web of the present invention. The diameter of the radial plate 13 is between 1 and 3 meters. When the diameter of the milling steel ball is small, the diameter of the web is taken as a small value; when the diameter of the ball is large, the diameter of the web is taken as a larger value. There are 30 to 50 round holes with a diameter of 80 to 200mm on the spoke plate 13, mainly to increase the fluidity of water in the 4 compartments of the runner and make the quenching process more stable.

Working principle of the present invention:

After the ball milling steel balls are produced by hot rolling in the cross rolling process, the quenching time is controlled by the frequency conversion control system according to the final temperature, and the steel balls cooled to 780~880°C are sent to the feeding chute 7 of the quenching device through the conveying mechanism. It will automatically roll into the compartment between the partitions 12 of the runner 4 by its own weight, and the frequency conversion control motor 1 will drive the runner 4 to rotate at a preset speed through the reducer 2 and coupling 3, and the steel ball will rotate downward. Entering the water tank 9, the water in the water tank 9 passes through the through holes on the web 13, the gap between the steel rings 10 and the through holes of the baffle plate 11, and quenches the steel balls in the compartment to complete the quenching. One side is exposed to the water surface, and the steel ball will automatically roll into the discharge chute 8 by virtue of its own weight, and then roll out of the discharge chute 8. The temperature of the rolled out ball milling steel balls needs to be kept at 180~300°C to realize the on-line continuous quenching process of cross rolling ball milling steel balls.

Claims (3)

1. one kind Oblique milling ball milling steel ball on-line continuous quenching device, this deviceComprise VFC motor (1), speed reduction unit (2), shaft coupling (3), runner (4), axle (5), chock (6), pan feeding chute (7), discharging chute (8), tank (9), wheel hub (14) and floor (15);

Wherein, said VFC motor (1) so that accurately control the speed of said runner (4), and then is realized temperature control accurately by the stepless frequency control of frequency-changing control system realization motor as required;

Said speed reduction unit (2) and the acting in conjunction of VFC motor are between said runner (4) speed drop to 0.2 ~ 3RPM;

Said shaft coupling (3) connects the output shaft of said speed reduction unit (2) with said axle (5) on being installed in said chock (6);

Said runner (4) is used for driving steel ball entering quenchant and quenches, and takes steel ball out of said tank (9); Said runner (4) is installed on the said axle (5) through said wheel hub (14), is provided with said floor (15) all around and reinforces; Said runner (4) is made up of steel ring (10), baffle plate (11), dividing plate (12) and disc (13); Said disc (13) welds with the end that equidistance is provided with a plurality of said dividing plates (12); The other end of said dividing plate (12) and said baffle plate (11) welding; Said steel ring (10) axially is uniformly distributed with 10-20 along said disc (13); Be welded on the said dividing plate (12), the space between said steel ring (10) and the steel ring (10) is not less than 3/4 of steel ball size d, and said wheel hub (14) welds the central position of said disc (13);

Said pan feeding chute (7) and said discharging chute (8) are located at the both sides of said axle (5), and the mounting height of said pan feeding chute (7) is lower than the axial line of said runner (4), and with the angle of the axial line of said runner (4) be α; The spacing Li of said pan feeding chute (7) and said dividing plate (12) is greater than the steel ball radius r; Said discharging chute (8) mounting height is lower than the axial line of said runner (4), and with the angle of the axial line of said runner (4) be β, the spacing Lo of said discharging chute (8) and said dividing plate (12) is less than the steel ball radius r;

Said tank (9) is used to store quenchant; Said runner (4) places said tank, and the inwall length L p of said tank (9) is greater than the diameter Dz of said runner (4), and its inwall width W is greater than the width W z of said runner (4), and depth H p is greater than the radius R z of said runner (4); Said tank (9) adopts steel plate welding or cement material to build by laying bricks or stones.

2. according to claim 1 Oblique milling ball milling steel ball on-line continuous quenching device, it is characterized in that the diameter of said disc (13) is a 1-3 rice; And it is the through hole that 80-200mm is used for increasing the flowability of runner separate space water that end face is provided with 30-50 diameter.

3. according to claim 1 and 2 Oblique milling ball milling steel ball on-line continuous quenching device, it is characterized in that the through hole that it is 50-100mm that said baffle plate (11) is provided with 20-40 diameter with being uniformly distributed along the circumference is used for increasing the flowability of runner separate space water.

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