Method for grinding leveling working roll with seat

Abstract

The invention discloses a method for grinding a leveling working roll with a seat. The method comprises the following steps: step 1, replacing a driving plate; secondly, a supporting tile is replaced, a connecting block is installed, and the position is roughly adjusted; thirdly, a headstock side supporting frame is installed; fourthly, a tailstock side supporting block and a cushion block are installed; 5, adjusting the position of the center frame; sixthly, the roller is lifted to a grinding machine, and the center of the roller is finely adjusted; seventhly, the grinding wheel is replaced; and step 8, selecting a leveling working roll program for grinding. The invention relates to the field of working roll use, in particular to a method for grinding a flat working roll with a seat.

Description

Technical Field

[0001] The invention relates to the field of working roll use, in particular to a grinding method for a flat working roll with a seat. Background Art

[0002] Hot rolled coil production lines are equipped with more than one leveling mill, generally a four-roll mill, two leveling working rolls and two leveling support rolls. The leveling working roll structure is mainly divided into four parts: roll body, bearing position, grinding support position and driving flat head. The roll body is the part involved in the rolling of the leveling mill. After the upper line is worn, it needs to be ground offline to ensure the roundness, roll shape and surface accuracy of the roll; a bearing seat is installed on each side of the bearing position to position the roll; the grinding support position is the reference for grinding, and there are four support pads on the grinder to support the position for grinding; the driving flat head matches the dial of the grinder to drive the leveling working roll to rotate.

[0003] The leveling working roll adopts the bare roll grinding method. The bearing seat needs to be disassembled and assembled every time it goes offline for grinding. The bearing seat needs to be disassembled and the bare roll needs to be ground before grinding on the grinder. After grinding, the bearing seat needs to be reassembled before going online. This not only has low production efficiency and high labor intensity, but also poses a safety hazard. In addition, it occupies the crane for a long time, which seriously restricts the production of the roller grinding room.

[0004] The prior art has the following disadvantages:

[0005] 1. The disassembly and assembly process of the flat work roll bearing seat requires three people to operate. It takes 1.5 hours to replace each flat work roll bearing seat. The flat line requires an average of 4 sets of 8 working rolls per day, which is a huge workload.

[0006] 2. There is no special disassembly and assembly machine for the bearing seat of the leveling work roll. The bearing seat is removed or inserted entirely by a crane, which is inconvenient and poses a great safety hazard.

[0007] 3. During the disassembly and assembly of the leveling work roll, collisions often occur, damaging the bearing seat accessories; frequent replacement of the bearing seat leads to poor bearing running-in performance, which significantly affects the bearing life.

[0008] 4. When the grinder operator hoists the bare roller, he needs to hang one end of the sling first, and then go around to hang the other end, which poses the risk of roller rolling or falling.

[0009] 5. The replacement of the leveling working roll restricts the use of the crane, causing other work in the roller shop that requires the use of the crane to be seriously delayed. Summary of the invention

[0010] The present invention aims at the installation and positioning of the smooth working roll on the grinding machine, the rotation drive of the roll, the support of the headstock side bearing seat, the flipping of the tailstock side bearing seat, the special hanger, the storage saddle and other mechanical parts; and improves the precision detection, grinding programming and other grinding processes to form a complete set of smooth working roll belt seat grinding methods.

[0011] To solve the above problems, the technical solution adopted by the present invention is as follows: The present invention is a method for grinding a flat work roll with a seat, comprising the following steps:

[0012] Step 1: Replace the drive dial;

[0013] Step 2: Replace the support pad, install the connecting block, and roughly adjust the position;

[0014] Step 3, install the head frame side support frame;

[0015] Step 4: Install the tailstock side support block and pad;

[0016] Step 5: Adjust the position of the center frame;

[0017] Step 6: Place the roller on the grinding machine to fine-tune the roller center;

[0018] Step 7: Replace the grinding wheel;

[0019] Step 8. Select the smooth working roll program for grinding.

[0020] Furthermore, the dial in step one is an extended dial. Since the protection plate interferes with the original roller drive disc, an extended dial for leveling roller drive is designed to move the axial positioning surface and the driving flat head outward.

[0021] Furthermore, the connecting block in step 2 is added between the support plate and the bracket, including 2 side plates and 2 bottom plates to meet the rigidity and height requirements, and the center bracket is adjusted to a suitable position according to the actual length.

[0022] Furthermore, the head side support frame in step three needs to be designed in a split manner, with the base being stationary and embedded in the center frame to avoid the support cylinder of the machine tool; the movable part is easy to carry and install, and is clamped into the base through four lining feet.

[0023] Furthermore, in the step six, the upper and lower grinders are hoisted, and a special mechanical hoist for the smooth working roll is designed and purchased, and the bearing seat support is used to realize the loosening and clamping of the hoist.

[0024] The beneficial effects achieved by the present invention using the above structure are as follows:

[0025] 1. High safety factor. Whether the rolls are stored or hoisted, safety hazards such as roll rolling and falling are eliminated, and the risk of collision during the disassembly and assembly of the bearing seat is avoided.

[0026] 2. Reduce labor intensity. There is no need to disassemble and assemble the bearing seat when leveling the upper and lower lines of the working rolls, thus reducing two working procedures.

[0027] 3. Improve production efficiency. First, it saves time for disassembling and assembling the bearing seat. Second, it significantly reduces the time occupied by the crane and improves the utilization rate of the crane.

[0028] 4. Reduce spare parts costs and solve the problem of frequent disassembly and assembly of bearing seats, which on the one hand prolongs the life of bearings; on the other hand reduces the damage to bearing seat accessories.

[0029] 5. The grinding accuracy of the rolls is controllable and the roll surface is well protected due to the use of hangers. DETAILED DESCRIPTION

[0030] Embodiment: The present invention is a method for grinding a flat work roll seat, comprising the following steps:

[0031] Step 1: Replace the drive dial. The dial is an extended dial. Because the protection plate interferes with the original roller drive disc, an extended dial for the leveling roller drive is designed to move the axial positioning surface and the drive flat head outward.

[0032] Step 2: Replace the support tile, install the connecting block, and roughly adjust the position. The connecting block is added between the support tile and the bracket, including 2 side tiles and 2 bottom tiles to meet the rigidity and height requirements. The center bracket is adjusted to the appropriate position according to the actual length;

[0033] Step 3: Install the head frame side support frame. The head frame side support frame needs to be designed in a split manner. The base does not move and is embedded in the center frame to avoid the support cylinder of the machine tool. The movable part is easy to carry and install, and is inserted into the base through four lining feet.

[0034] Step 4: Install the tailstock side support block and pad;

[0035] Step 5: Adjust the position of the center frame;

[0036] Step 6: Hoist the roll onto the grinder, fine-tune the roll center, hoist the middle and upper grinders, design and purchase a special mechanical hoist for leveling the work roll, and use the bearing seat support to loosen and clamp the hoist;

[0037] Step 7: Replace the grinding wheel;

[0038] Step 8. Select the smooth working roll program for grinding.

[0039] The roller profile curve of the seat grinding does not need to be modified, but the slight swing of the bearing seat will have a certain impact on the grinding accuracy. Therefore, it is necessary to improve the parameters of grinding the bare roller, such as reducing the roller speed and feed rate, and increasing the grinding wheel linear speed. The specific parameters are shown in Table 1 below.

[0040] Table 1 Grinding parameters of smooth working roll

[0041] Serial number name Rough grinding parameters Fine grinding parameters 1 Roller speed (r / min) 18 10 2 Grinding wheel speed (m / s) 43 10 3 Frame speed (mm / min) 1800 2000 4 End feed(mm) 0.015 0.005 5 Continuous feed (mm / min) 0.12 0.08 6 Pass (single) 30 10

[0042] It should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A method for grinding a flat work roll seat, characterized in that: The steps include: Step 1: Replace the drive dial; Step 2: Replace the support pad, install the connecting block, and roughly adjust the position; Step 3, install the head frame side support frame; Step 4: Install the tailstock side support block and pad; Step 5: Adjust the position of the center frame; Step 6: Place the roller on the grinding machine to fine-tune the roller center; Step 7: Replace the grinding wheel; Step 8. Select the smooth working roll program for grinding.

2. The method for grinding a flat work roll seat according to claim 1, characterized in that: The dial in step 1 is an extended dial. Since the protection plate interferes with the original roller drive disc, an extended dial for leveling roller drive is designed to move the axial positioning surface and the driving flat head outward.

3. The method for grinding a flat work roll seat according to claim 2, characterized in that: The connecting block in step 2 is added between the support tiles and the bracket, including 2 side tiles and 2 bottom tiles to meet the rigidity and height requirements. The center bracket is adjusted to a suitable position according to the actual length.

4. The method for grinding a flat work roll seat according to claim 3, characterized in that: The head side support frame in step three needs to be designed in split parts. The base is fixed and embedded in the center frame to avoid the support cylinder of the machine tool. The movable part is easy to carry and install, and is inserted into the base through four lining feet.

5. The method for grinding a flat work roll seat according to claim 4, characterized in that: In the step six, the upper and lower grinders are hoisted, and a special mechanical hoist for the smooth working roll is designed and purchased, and the bearing seat support is used to realize the loosening and clamping of the hoist.