CN110014340A - Strip steel surface grinding machine - Google Patents

Abstract

The invention discloses a strip steel surface grinding machine which comprises a grinding machine support, wherein a servo motor is fixed on the grinding machine support, a transmission shaft of the servo motor is provided with a speed reducer, a rotating shaft is arranged on the speed reducer, a swinging arm is arranged on the rotating shaft, one end of the swinging arm is provided with a cylinder, a flexible grinding head is fixed on a piston telescopic rod of the cylinder, and grinding oilstones are arranged below the flexible grinding head; the invention has reasonable structural design and convenient use, and can realize the polishing of the surface of the strip steel by adopting the principle of the polisher, and the polisher not only can meet the polishing of the surface of a hard roll, but also can realize the polishing of the surface of the strip steel with a coating, and can be used for the online polishing under the condition that a machine set does not stop, and also can realize the offline polishing of the strip steel. By adopting the polishing machine, the full automation of the strip steel polishing work can be realized, the manual polishing is completely replaced, the labor productivity is improved, the working environment of workers is improved, the operation efficiency of a unit is improved, and the surface defects of the strip steel are prevented from being missed.

Description

A strip surface grinding machine

technical field

The invention relates to the technical field of metallurgical machinery, in particular to a strip steel surface grinding machine.

Background technique

In the production process of cold-rolled strip, products with higher surface quality need to be checked by grinding. For the rolled hard coils exported from the rolling mill, there will be defects such as roll marks, vibration lines, and surface slag inclusions during the rolling process. These defects are slightly macroscopic and difficult to identify directly with the naked eye. The surface of the steel coil is ground to expose the defects, so as to find the defects on the surface of the plate and provide conditions for the subsequent formulation of practical solutions. Similarly, for coated strips (such as automobile sheets, home appliance sheets, etc.), in order to check for surface defects such as roll marks, coating defects, and vibration patterns that occur during the production and transmission of strips, the surface of the strips needs to be polished to detect quality.

At present, the grinding of cold-rolled sheets at home and abroad mostly adopts manual grinding. The manual grinding method is that the operator holds a whetstone and continuously grinds the distance of the maximum roller circumference of the unit on the surface of the strip, and the grinding worker observes the shape of the strip surface after grinding. appearance to detect defects on the board surface. The use of this grinding method not only has a large workload and low efficiency, but also has human factors, which often lead to missed inspections. This grinding method has become an important factor restricting the production capacity of the unit, limiting the production capacity of the unit.

On the basis of fully mastering the manual grinding methods and characteristics, this patent uses the principle of bionics to simulate the manual grinding method and grinding pressure to realize the online or offline grinding of the strip surface. The use of this grinding machine can completely replace manual grinding. Through grinding, surface defects such as surface slag inclusions, roll marks, and vibration patterns can be effectively displayed, and the grinding speed and grinding effect can be greatly improved.

Through online search, no technology identical or similar to this application has been found in patent documents, non-patent documents and other technologies disclosed.

SUMMARY OF THE INVENTION

(1) Technical problems solved

Aiming at the deficiencies of the prior art, the present invention provides a strip surface grinding machine, which has the advantages of improving labor productivity, improving the working environment of employees, etc., and solves the problems of large workload and low grinding efficiency in the existing grinding.

(2) Technical solutions

In order to achieve the above purpose, the present invention provides the following technical solutions: a strip steel surface grinder, comprising a grinder support, a servo motor is fixed on the grinder support, and a reducer is installed on the drive shaft of the servo motor, so The speed reducer is provided with a rotating shaft, the rotating shaft is provided with a swing arm, one end of the swing arm is provided with a cylinder, a flexible grinding head is fixed on the piston telescopic rod of the cylinder, and a flexible grinding head is arranged below the flexible grinding head. Whetstone.

Preferably, the speed reducer is connected to the rotating shaft through a coupling.

Preferably, the cylinder and the swing arm are fixedly connected by screws and nuts.

Preferably, the flexible grinding head is a flexible structure, and each spatial direction has a certain flexibility, but the rigidity of each direction is different, so as to ensure that the whetstone can meet the requirements of the roughness of the strip surface and ensure the uniformity of grinding.

Preferably, the flexible grinding head is magnetically connected to the grinding stone, a layer of mild steel with a thickness of 1-2 mm is pasted on the grinding stone, and the permanent magnet fixed on the flexible grinding head absorbs the mild steel , connect the whetstone to the flexible sanding head.

Preferably, the length L of the polishing stone is between 100 and 150 mm, the width W is between 10 and 50 mm, and the height h is between 10 and 50 mm.

Preferably, the swing arm is sleeved on the rotating shaft, and is fastened and fixed by screws and nuts.

(3) Beneficial effects

Compared with the prior art, the present invention provides a strip steel surface grinding machine, which has the following beneficial effects:

1. This kind of strip steel surface grinding machine has a reasonable structure design. The grinding machine principle can be used to realize the grinding of the strip steel surface. This grinding machine can not only meet the grinding of the surface of the rolled hard coil, but also realize the grinding of the surface of the coated strip steel. , which can be used for on-line grinding of the unit and off-line grinding of strip steel. The use of this grinding machine can realize fully automatic strip grinding work, completely replace manual grinding, improve labor productivity, improve the working environment of employees, increase the running speed of the unit, and ensure that the surface defects of strip steel are not missed.

2. For this kind of strip surface grinding machine, there are many areas in the cold-rolled strip production process that need grinding operations, such as the exit of the rolling mill, the coating production line of automobile and household appliances, and the strip finishing unit. For a long time, this grinding operation has been Some manual operations are completed, there are problems of large labor workload, difficult to control the grinding quality, and long grinding time. The invention can upgrade the manual grinding mode to automatic machine grinding, improve the grinding quality while improving labor productivity, greatly reduce the labor intensity of workers, and has a very broad application prospect.

Description of drawings

Fig. 1 is the composition diagram of the strip steel surface on-line grinding machine of the present invention;

Fig. 2 is the schematic diagram of surface grinding marks of strip steel of the present invention;

Fig. 3 is the structural schematic diagram of polishing oil stone of the present invention;

Fig. 4 is the composition diagram of the offline grinding machine of the present invention.

In the picture: 1. Servo motor; 2. Reducer; 3. Rotating shaft; 4. Swing arm; 5. Cylinder; 6. Flexible grinding head; 7. Grinding stone; 8. Workbench; 9. Grinder bracket; 10 , roller; 11, guide rail; 12, strip steel; 13, mild steel.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Embodiment 1: Please refer to Figures 1-4, the present invention provides a technical solution: a strip steel surface grinding machine, comprising a grinding machine bracket 9, a servo motor 1 is fixed on the grinding machine bracket 9, and the servo motor A reducer 2 is installed on the transmission shaft of A flexible grinding head 6 is fixed on the telescopic rod of the piston, and a grinding oil stone 7 is arranged below the flexible grinding head 6 .

Further improved, the speed reducer 2 is connected to the rotating shaft 3 through a coupling.

Further improved, the cylinder 5 and the swing arm 4 are fixedly connected by screws and nuts.

In a further improvement, the flexible grinding head 6 is magnetically connected to the grinding stone 7, and a layer of mild steel with a thickness of 1-2 mm is pasted on the grinding stone 7, and the flexible grinding head 6 is permanently fixed. The magnet connects the polishing stone 7 with the flexible polishing head 6 by adsorbing the mild steel.

Further improved, the length L of the polishing stone 7 is between 100 and 150 mm, the width W is between 10 and 50 mm, and the height h is between 10 and 50 mm.

Further improved, the swing arm 4 is sleeved on the rotating shaft 3, and is fastened and fixed by screws and nuts.

Further improved, the flexible grinding head 6 is a flexible structure, so that the grinding stone 7 can tolerate the unevenness of the plate surface and ensure uniform grinding.

1) The invented online grinding machine is shown in Figure 1. The swing arm of the grinding machine is driven by the servo motor through the reducer to make a reciprocating rotating motion. The running strip surface makes a reciprocating circular motion to realize the grinding of the strip surface.

2) The flexible grinding head is pushed and pressed down by the cylinder, and the grinding head is closely attached to the strip. Afterwards, the flexible grinding head is driven by the grinding arm driven by the servo motor to reciprocate and rotate on the surface of the moving strip to realize the grinding of the surface of the strip. The grinding marks obtained by grinding are shown in Figure 2. In Figure 2, R is the swing radius of the grinding arm, A is the swing angle of the swing arm, and B is the length of the whetstone.

3) The driving mechanism of the grinding machine is composed of a servo motor, a reducer, a rotating shaft and a swing arm. The angle A of the reciprocating rotation of the swing arm is controlled by the servo motor, the length of the swing arm is fixed, and the obtained rotation radius is R.

Example 2: A finishing unit of a galvanized sheet, the working width of the strip 12 is 700mm, and the running speed of the strip 12 under normal working conditions is 150m/min, in order to detect the roll marks and clips of the coating on the surface of the strip 12. For slag and vibration pattern defects, surface grinding needs to be carried out on the 6-meter area of the head and tail of the entire strip 12. Since manual grinding is used, it is necessary to stop the grinding process to observe the surface quality after grinding. In order to replace manual grinding, the unit adopts this patent on the observation table to realize automatic grinding.

The technical scheme of the online grinding machine implemented on this unit is:

1) When the strip 12 needs to be ground, the unit will reduce the speed. When the speed of the belt is reduced from 150m/min to 10m/min, start the grinding machine to start grinding. When the required grinding length is reached, the unit will stop and the strip will be 12 stays in the observation platform area, and the surface quality of the strip steel 12 is checked by the operator.

2) The basic composition of the online grinding machine is shown in Figure 1. The length of the swing arm 4 of the grinding machine is 500mm, the grinding arm is driven by the servo motor 1 through the reducer 2, the swing angle A is 70°, and the swing arm 4 is driven by the servo motor 1 The swing frequency is 70HZ.

3) The grinding stone 7 used in the grinding machine is diamond jade stone, the particle size of the grinding stone 7 is 800#, the length L of the grinding stone 7 is 150mm, the width W is 30mm, and the thickness h is 20mm, and the surface of the grinding stone 7 is epoxy resin. Adhere a piece of 150*30mm cold-rolled mild steel with a thickness of 1.5mm. The connection between the polishing stone 7 and the flexible polishing head 6 adopts four permanent magnets installed inside the polishing head.

4) The flexible grinding head 6 is a flexible mechanism, its longitudinal compliance is automatically adjusted by the cylinder 5 plus the spring inside the grinding head, the radial flexibility is adjusted by the edge stiffness spring inside the grinding head, and the circumferential flexibility is adjusted by the grinding head. The content of the variable stiffness spring and the flexible damping pad adjustment of the connection part. Combining these flexible structures, the grinding head can be changed according to the shape of the surface of the strip steel 12 to achieve close contact with the strip steel 12 to ensure the grinding effect.

5) When the grinding head is in a free state, adjust the height of the bracket so that the distance between the new oil stone and the steel strip 12 is 15mm, the stroke of the cylinder 5 is 35mm, the cylinder 5 is driven by compressed air, and the compressed air acting on the cylinder 5 The pressure is 1kg/cm².

The use of this grinding machine can realize online grinding of strip steel. The grinding machine is manually operated, and the operation is safe and reliable. It takes 3 minutes for manual grinding in a 6-meter-long area. After grinding with the grinding machine, the grinding time can be reduced to 1 Within minutes, the labor intensity of workers is greatly reduced, and the production capacity of the unit is increased.

Example 3: A hot-dip galvanizing production unit of an automobile sheet detects defects such as roll marks, slag inclusions, and vibration patterns on the surface of the coating. It is necessary to take samples to the grinding table for off-line manual grinding inspection. The length of the strip is 5 meters, and the unit has The steel width ranges from 700 to 1200 mm, and manual grinding is used for both grinding and testing. In order to replace manual grinding, the unit adopts the patented technology on the observation table to realize automatic grinding.

The technical scheme of the online grinding machine implemented on this unit is:

1) The basic composition of the online grinding machine is shown in Figure 4. The length of the swing arm 4 of the grinding machine is 700mm, the grinding arm is driven by the servo motor 1 through the reducer 2, and the swing angle is automatically calculated by the PLC according to the width of the strip 12, A=2*arcsinB/1000, when the width of the strip 12 is When the width is 700mm, the swing angle is 60°. When the width of the strip 12 is 1200mm, the swing angle is 100°. The swing frequency of the swing arm 4 is 30HZ driven by the servo motor 1.

2) Driven by the motor of the worktable 8, its moving speed is 10m/min. A nitrile rubber sheet with a thickness of 2-3 mm is placed on the worktable 8 of the grinding machine, and the strip steel 12 is placed on the rubber sheet.

3) The polishing stone 7 used in the grinding machine is boron carbide fine polishing stone. The particle size of the polishing stone 7 is 800#, the length L of the polishing stone 7 is 150mm, the width W is 50mm, and the thickness h is 30mm. Oxygen resin adheres to a piece of cold-rolled mild steel with a thickness of 150*50mm and a thickness of 1.5mm. The connection between the polishing stone 7 and the flexible polishing head 6 adopts four permanent magnets installed inside the polishing head.

4) The flexible grinding head 6 is a flexible mechanism, its longitudinal compliance is automatically adjusted by the cylinder 5 plus the spring inside the grinding head, the radial flexibility is adjusted by the edge stiffness spring inside the grinding head, and the circumferential flexibility is adjusted by the grinding head. The content of the variable stiffness spring and the flexible damping pad adjustment of the connection part. Combining these flexible structures, the grinding head can be changed according to the shape of the surface of the strip steel 12 to achieve close contact with the strip steel 12 to ensure the grinding effect.

5) When the grinding head is in a free state, adjust the height of the bracket so that the distance between the new oil stone and the steel strip 12 is 15mm, the stroke of the cylinder 5 is 35mm, the cylinder 5 is driven by compressed air, and the compressed air acting on the cylinder 5 The pressure is 1kg/cm².

The use of this grinding machine can realize off-line grinding of strip steel. It used to take 3-5 minutes to manually grind this 5-meter-long strip. After grinding with the grinding machine, the grinding time can be reduced to less than 1 minute, which greatly reduces the time required for grinding. labor intensity of workers.

To sum up, the structure design of the present invention is reasonable, and the grinding machine principle can be used to realize the grinding of the surface of the strip steel 12. This grinding machine can not only satisfy the grinding of the surface of the rolled hard coil, but also realize the grinding of the surface of the coated strip steel 12. It can be used for on-line grinding of the unit, and can also realize off-line grinding of strip steel 12. The use of this grinding machine can realize fully automatic grinding of strip 12, completely replace manual grinding, improve labor productivity, improve the working environment of employees, increase the running speed of the unit, and ensure that the surface defects of strip 12 are not missed; There are many areas in the production process of steel 12 that need grinding operations, such as the exit of the rolling mill, the coating production line of automobile and household appliances, and the finishing line of steel 12. For a long time, this grinding operation has been completed manually, and there is a large workload. The grinding quality is not easy to control, and the grinding time used is long. The invention can upgrade the manual grinding mode to machine automatic grinding, improve the grinding quality while improving labor productivity, greatly reduce the labor intensity of workers, and has a very broad application prospect.

It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (7)

1. A strip steel surface grinding machine, comprising a grinding machine support (9), characterized in that: a servo motor (1) is fixed on the grinding machine support (9), and a drive shaft of the servo motor (1) is fixed on the grinding machine support (9). A reducer (2) is installed, a rotating shaft (3) is arranged on the reducer (2), a swing arm (4) is arranged on the rotating shaft (3), and one end of the swing arm (4) is arranged with a A cylinder (5), a flexible grinding head (6) is fixed on the piston telescopic rod of the cylinder (5), and a grinding stone (7) is arranged below the flexible grinding head (6). 2 . The surface grinding machine for strip steel according to claim 1 , wherein the speed reducer ( 2 ) is connected to the rotating shaft ( 3 ) through a coupling. 3 . 3 . The strip surface grinding machine according to claim 1 , wherein the cylinder ( 5 ) and the swing arm ( 4 ) are fixedly connected by screws and nuts. 4 . 4 . The strip steel surface grinding machine according to claim 1 , wherein the flexible grinding head ( 6 ) is magnetically connected to the grinding stone ( 7 ), and the grinding stone ( 7 ) is pasted on the grinding stone ( 7 ). 5 . The upper layer is of mild steel with a thickness of 1-2 mm, and the permanent magnet fixed on the flexible polishing head (6) connects the polishing stone (7) with the flexible polishing head (6) by adsorbing the mild steel. 5. A strip steel surface grinding machine according to claim 1, characterized in that: the length L of the grinding stone (7) is between 100 and 150 mm, the width W is between 10 and 50 mm, and the height is between 10 and 50 mm. h is between 10 and 50 mm. 6 . The strip surface grinding machine according to claim 1 , wherein the swing arm ( 4 ) is sleeved on the rotating shaft ( 3 ), and is fastened and fixed by screws and nuts. 7 . 7. A strip steel surface grinding machine according to claim 1, characterized in that: the flexible grinding head (6) is a flexible structure, so that the grinding stone (7) can tolerate the unevenness of the plate surface and ensure grinding evenly.