CN115318376A - Assembly process of fuel crushing roller for sintering iron ore - Google Patents
Assembly process of fuel crushing roller for sintering iron ore Download PDFInfo
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- CN115318376A CN115318376A CN202210669001.XA CN202210669001A CN115318376A CN 115318376 A CN115318376 A CN 115318376A CN 202210669001 A CN202210669001 A CN 202210669001A CN 115318376 A CN115318376 A CN 115318376A
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000008569 process Effects 0.000 title claims abstract description 36
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 239000000446 fuel Substances 0.000 title claims abstract description 21
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 17
- 238000005245 sintering Methods 0.000 title claims description 8
- 239000000463 material Substances 0.000 claims description 22
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 27
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000003466 welding Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 description 9
- 230000007704 transition Effects 0.000 description 7
- 238000005299 abrasion Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/30—Shape or construction of rollers
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Rolls And Other Rotary Bodies (AREA)
Abstract
The invention provides an assembly process of a fuel crushing roller for a sintered iron mine, which comprises the following steps: step one, positioning a roll shaft on a tool platform; step two, mounting the roller sleeve on a positioning step of the roller shaft after preheating; and step three, locking and fixing the roll shaft and the roll width at one end of the roll sleeve through a locking assembly. By adopting the assembly process, the manufactured crushing roller has the advantages of simple structure, convenient manufacture and light weight, and production practices prove that the roller sleeve which is in service for many times does not loosen and break blocks; the roll shaft is not broken; the roll surface does not need to be cut on line; the roller surface is subjected to surfacing welding to the drawing size after being evenly worn to a certain size, and the bearing is detected, so that the roller surface can be recycled, the maintenance is simple, the manufacturing and using cost is low, and the working strength of management and manufacturing personnel is reduced.
Description
Technical Field
The invention relates to the technical field of mechanical manufacturing, in particular to an assembly process of a fuel crushing roller for sintering iron ore.
Background
The iron ore materials used in the present production process technology for smelting pig iron are sintered ores, and fuels (coke powder and coal powder) used by the sintered ores are main raw materials of the sintered ores, 2000 ten thousand tons of sintered ores are produced every year, and the fuel consumption is about 330 ten thousand tons.
Generally, each iron ore sintering production line is provided with a fuel crushing production line, and the fuel crushing production line consists of a raw material bin, a material conveyor, a group of double-roller crushing rollers, a group of four-roller (a pair of upper rollers and a pair of lower rollers) crushing rollers and a finished product bin.
The double rollers of the fuel crushing production line undertake the primary crushing of materials, the upper rollers of the four rollers undertake the secondary crushing of the materials, and the lower rollers of the four rollers undertake the final crushing of the materials. The productivity of a fuel crushing production line is 70-80 t/h, and the requirement on the granularity of the crushed materials is as follows: the particle size larger than 3mm does not exceed 5%. The roll gap (the distance between the outer diameter of the driving roll and the outer diameter of the driven roll) of the lower roll of the four rolls is usually 1-3 mm, and after the roll gap is adjusted, the roll gap is ensured to be changed due to the change of the material distribution thickness when the roll works by using a tensioning structure of a spring. In fact, when the crushing roller is in service, the working states of the driving roller under the four rollers and the driven roller under the four rollers are mutually collided, only the separation resistance of materials exists, and the collision force acts on the materials to extrude and crush the materials, but the conditions that the working surfaces of the rollers are contacted and collided when the abrasion of the roller surfaces is uneven and the concave and convex surfaces are not flat or under the condition of material shortage cannot be avoided.
The crushing roller manufactured by the traditional technology has the defects of loosening of an annular wedge, breakage of a pull rod, breakage of a roller edge, cracking, falling and delamination of a surfacing working layer of a roller surface when in service. The roller surface is abraded to form concave and convex states, and the accident of roller shaft breakage happens occasionally.
For the conditions that the annular wedge of the crushing roller is loosened and the pull rod is broken, the processing means is to replace the roller, and the crushing roller which is off-line is disassembled, repaired to damage the piece, replaced to waste and assembled and repaired; replacing a new roller when the roll edge breaking block affects the service, disassembling the offline crushing roller, repairing a damaged part, replacing a scrapped part, assembling and repairing; for the condition that the roller surface is abraded with concave and convex surfaces and has cutting performance (some surfaces are cracked and have high hardness and cannot be cut), a cutting machine is arranged beside the roller for online cutting; repairing the roll surface without cutting; and for the accident of roll shaft breakage, replacing the roll shaft of the roll which is off-line, and reassembling and repairing.
When the crushing roller is manufactured by the traditional technology to be in service, the normal operation of a production line is greatly influenced by the frequent occurrence of the accident problem (except the broken shaft accident). The workload and the labor intensity of the operators are increased. The management workload and difficulty of production technical managers are increased. The unreliability of the service of the crushing roller increases the quantity of spare parts in stock, and the fund occupation is large. The crushing roller of unloading restores the degree of difficulty greatly, and it is big to restore work load, and the repair cost is high.
As a roller with the largest stress in the assembly of the crushing roller, the roller is not directly assembled on a roller shaft, but one side of the roller is matched with the roller shaft through the transition of a support frame, the support frame is screwed by a threaded sleeve arranged on the shaft, and the threaded sleeve is locked with the support frame by a lock pin. The other side of the roller is matched with the conical surface of the inner hole of the roller by the conical surface of the annular wedge, one side of the wedge transition sleeve is positioned by the positioning step of the roller shaft, the inner hole of the annular wedge is matched with the transition sleeve, the inner hole of the transition sleeve is matched with the roller shaft, and the positioning and fastening of the annular wedge are realized by the tensioning function of 6 pull rods and the support frame which are distributed circumferentially. This assembly structure unduly complicates fabrication and assembly, but it is critical to the assembly structure as to the precision of the fit and whether it can be achieved. Whether the large-diameter annular wedge can be tightened by the fastening force of the pull rod is considerable.
It is well known that the use of a circular taper fit with a self locking function in the engagement of a drill bit with a drill sleeve is a successful application for ease of assembly and disassembly. The matching requires high processing precision, namely, the surface finish requires the finish of a matching surface to reach 0.8 mu m; secondly, the requirement of matching with the taper is accurate, and the manufacturing of a drill bushing and a drill bit of a standard part is provided with a detection and measurement device of special equipment, so that the precision requirement can be easily met. It is difficult to achieve that the above conditions are met for the conical fit of the crushing roller and the annular wedge. Both belong to non-standard parts produced by single pieces and small batches, special processing equipment (taper grinding machine) and detection devices for processing large-scale inner taper and outer taper are not available in the market, and the matching precision (finish degree and taper) of the two parts is difficult to achieve in the processing of common processing equipment (lathe). The taper fit of the precision level cannot be achieved in an attempt, the matching surface of the taper fitting device can only be in line contact or point contact, the taper fitting device is easy to loosen due to the action of vibration force during service, and large axial force is generated when the taper fitting device is slightly loosened to act on the pull rod, so that the accident of breakage of the pull rod cannot be avoided. Even if professional manufacturers uniformly cut the annular wedge into 3 blocks (each block is 120 degrees) in the circumferential direction, the annular wedge is installed in a split mode, the purpose is to improve the taper matching surface, and the method has little effect on eliminating the looseness of the wedge.
In addition, the prior roller sleeve has no roller width in structural view, the roller sleeve is designed into a cylindrical body, and obviously, the roller structure of the cylindrical body has poor rigidity and low strength. When in service, the roller edge has less material distribution and light abrasion, and the roller edge becomes a convex surface which is a collision contact point and is broken by long-term collision.
The roller shaft is made of No. 45 steel, and the roller shaft is broken due to various reasons. (1) The hardenability and the hardenability of No. 45 steel are obviously reduced when the work piece hardenability of a large cross section is poor, the wall thickness generally exceeds 80mm, the diameter of a roll shaft is 330mm, and the comprehensive performance after heat treatment cannot meet the use requirement; (2) The annular wedge is loosened, no treatment is found at a moment, the roller is loosened and eccentric, and the collision force is large.
In this regard, there is a strong need for a crushing roller which avoids the above-mentioned problems and which is safe and reliable in operation.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art. Therefore, the invention provides an assembly process of a fuel crushing roller for a sintered iron mine, and aims to optimize the structure of the assembled crushing roller and reduce the labor intensity of operators.
Based on the purpose, the invention provides an assembly process of a fuel crushing roller for a sintered iron ore, which comprises the following steps:
step one, positioning a roll shaft on a tool platform;
step two, mounting the roller sleeve on a positioning step of the roller shaft after preheating;
and step three, locking and fixing the roll shaft and the roll width at one end of the roll sleeve through a locking assembly.
The preheating is to preheat the roller sleeve for 4 to 6 hours at the temperature of between 120 and 150 ℃.
The assembly process further comprises the step of carrying out dynamic balance check on the roll shaft and the roll sleeve after the third step of locking and fixing.
The process flow of the dynamic balance check comprises the following steps:
s1, assembling a deep groove bearing at a bearing position of a roll shaft, and sleeving a roll on a balance support;
s2, defining two ends of the roll shaft as a first end and a second end respectively, and positioning a bearing at the first end of the roll shaft in an XYZ axial direction; positioning a bearing at the second end of the roll shaft in the YZ axial direction, contacting the bearing end face with a dial indicator in the X axial direction, rotating the roll sleeve, and reading maximum and minimum data of the swing of the dial indicator;
s3, fixing the weighting block at the position of the end face of the roll width at the second end of the roll shaft, and rotating the roll sleeve to enable the maximum reading of the swing of the dial indicator to be combined with the dynamic balance standard;
s4, dividing the weight of the weighting block into two parts, wherein one part is placed at the end face position of the first end of the roll shaft, and the other part is placed at the opposite position symmetrical to the end face of the first end;
s5, positioning the second end bearing in the XYZ axial direction, fixing the first end bearing in the YZ axial direction, contacting the end face of the bearing with a dial indicator in the X axial direction, rotating the roller sleeve, and verifying whether the maximum swing reading of the dial indicator meets the dynamic balance standard or not; if not, the adjustment is carried out again.
The material of roller is 42CrMo forged steel, and each step of roller sets up the arc angle.
And in the second step, the roller sleeve is firstly aligned to the key on the roller shaft, and the roller sleeve is arranged on the positioning step of the roller shaft through the matching of the key and the key groove.
The key is a semicircular key, and the key groove is a semicircular key groove.
And the locking assembly in the third step comprises a locking nut and a locking pin, the locking nut is sleeved on the roller shaft and is in contact locking with the outer side wall of the second end roller width, and the locking nut and the second end roller width are locked and fixed through the matching of the locking pin and a pin hole in the outer side wall of the second end roller width.
The invention has the beneficial effects that:
1. by adopting the assembly process, the manufactured crushing roller has the advantages of simple structure, convenient manufacture and light weight, and production practices prove that the roller sleeve which is in service for many times does not loosen and break blocks; the roll shaft is not broken; the roll surface does not need to be cut on line; the roller surface is welded to the drawing size through surfacing welding after uniform abrasion reaches a certain size, and the bearing is detected, so that the roller surface can be recycled, the maintenance is simple, the manufacturing and using cost is low, and the working strength of management and manufacturing personnel is reduced.
2. The invention optimizes the assembly process of the roll shaft and the roll sleeve, wherein the roll shaft and the roll sleeve are directly assembled without adopting a support frame for transition, thereby avoiding the risk caused by adopting the support frame for transition assembly. The roller (roller sleeve) and the roller shaft are assembled in an interference fit mode, the interference magnitude is 0.35-0.5 mm, and the two assembling parts are locked by using the resistance of the plastic deformation of the material of the inner hole section of the roller amplitude of the assembling fitting piece. A good assembly effect is achieved.
3. In the assembly process, the roller widths are arranged at the two ends of the roller sleeve, so that the roller sleeve is convenient to be matched with a roller shaft better. The key groove at the roller width is preferably a semicircular key groove, so that the right-angle part of the flat key is prevented from being pulled apart by the resistance of plastic deformation generated by materials when the flat key is assembled. In the setting of locking Assembly, lock nut fastens the terminal surface of a limit roll width of cloth, and the fitting pin is with lock nut and roll width of cloth locking, realizes better locking effect.
4. The boss-shaped structures are arranged on two sides of the assembly position of the roller amplitude and the roller shaft, so that the contact area of the roller amplitude and the roller shaft is increased, and the pressure of the roller amplitude to the roller shaft is reduced.
5. The design of the roller shaft structure, the material and the heat treatment process is optimized. (1) The preferable material of the roll shaft is 42CrMo forged steel, and the 42CrMo material has excellent hardenability and hardenability; (2) optimizing the sectional dimension of the roll shaft, and optimizing the arc angle of each step (to prevent stress concentration); (3) and optimizing the roll shaft processing and heat treatment process.
6. The assembly process optimizes the dynamic balance check of the crushing roller. The non-machinable roller sleeve has the advantages that the non-machinable roller sleeve has non-machinability, mass nonuniformity is generated during the manufacturing of the roller sleeve, unbalanced centrifugal force is generated during the rotation of the roller sleeve, the axial deviation of the crushing roller is caused to cause vibration, the dynamic balance is used as a process in the manufacturing process of the crushing roller, and the problems can be effectively avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of the assembly process of the present invention;
FIG. 2 is a process flow diagram of the dynamic balancing of the present invention;
FIG. 3 is a schematic view showing an assembly structure of a roll shaft and a roll sleeve according to the present invention;
FIG. 4 is a schematic view of the construction of the sleeve of the present invention.
Labeled in the figure as:
1. an assembly hole; 2. a first roll web; 3. a second web; 4. an inner bore; 5. a keyway; 6. a pin hole; 7. connecting a rib plate; 8. a roll shaft; 9. a roller sleeve; 10. a semicircular key; 11. locking the nut; 12. and a locking pin.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
It is to be noted that technical terms or scientific terms used in the embodiments of the present invention should have the ordinary meanings as understood by those having ordinary skill in the art to which the present disclosure belongs, unless otherwise defined. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item preceding the word comprises the element or item listed after the word and its equivalent, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
In the present invention, the two ends of the roller shaft 8 are defined as a first end (left end) and a second end (right end), respectively.
As shown in fig. 1 to 4, the present invention relates to an assembly process of a fuel crushing roller for sintering iron ore, comprising the steps of:
step one, positioning the roll shaft 8 on a tool platform; during operation, the roll shaft is vertically fixed on the tool platform.
Step two, mounting the roller sleeve 9 on a positioning step of the roller shaft 8 after preheating; wherein, the preheating is to preheat the manufactured roller sleeve 9 in a box-type resistance furnace for 4 to 6 hours at the temperature of between 120 and 150 ℃; the operation method of installing the roller shaft positioning step is to hoist the roller sleeve 9 to align with the key on the roller shaft 8, and then to place the roller sleeve on the positioning step of the roller shaft through the matching of the key and the key groove 5.
And step three, locking and fixing the roll shaft 8 and the roll width at one end of the roll sleeve 9 through a locking assembly.
The locking assembly comprises a locking nut 11 and a locking pin 12, the locking nut 11 is sleeved on the roll shaft 8 and is in contact locking with the outer side wall of the second end roll width, and the locking nut 11 is locked and fixed with the second end roll width through the locking pin 12 and the pin hole on the outer side wall of the second end roll width. During operation, one side (outer end face) of the second end roll width is locked by the cooled roll sleeve through a locking nut, and the locking nut is matched with a pin hole in the second end roll width through a locking pin to be locked and fixed.
As shown in fig. 3, the key is a semicircular key 10 and the key groove 5 is a semicircular key groove. And the semicircular key groove is adopted, so that the problem that the right-angle position of the flat key is cracked by the resistance of plastic deformation of materials when the flat key is assembled is avoided.
The assembly structure after assembly by adopting the assembly process is shown in figure 1, the roller sleeve 9 is in interference fit with the roller shaft 8, the two ends of the roller sleeve 9 are respectively provided with a roller width, the inner hole 4 of the roller width is coaxially arranged with the interference fit assembly hole 1 of the roller sleeve 9, and the assembly part of the roller width and the roller shaft 8 is provided with a boss-shaped structure. The assembly structure realizes the direct interference fit of the roll shaft and the roll amplitude together without adopting a support frame for transition, and the boss-shaped structures are arranged on two sides of the assembly position of the roll amplitude and the roll shaft, so that the contact area of the roll amplitude and the roll shaft is increased, and the pressure of the roll amplitude on the roll shaft is reduced. The arrangement of the roll widths at the two ends of the roll sleeve is convenient for being directly assembled with the roll shaft.
The roll width of roll shell 9 both ends head is first roll width 2 and second roll width 3 respectively, and first roll width 2 passes through the cooperation be assembled between/be connected between key and keyway 5 with roller 8, and locking Assembly and roller 8 locking connection are passed through to the lateral wall of second roll width 3. Through setting up of key and keyway and locking Assembly, be convenient for realize the locking assembly of roller and roller shell. When the roller is arranged, the first roller web and the second roller web are arranged into the same roller web structure.
In order to further optimize the structure of the roller sleeve in the assembly process, a connecting rib plate 7 for connecting the two roller arms is arranged between the roller arms at the two ends of the roller sleeve 9. The connecting rib plate arranged between the two roll sheets increases the rigidity and the strength of the roll sleeve. The connecting rib plates 7 are multiple, and the connecting rib plates 7 are distributed in the circumferential direction between the two roll frames. A plurality of connecting rib plates are arranged in the circumferential direction, so that the rigidity and the strength of the roller sleeve in the circumferential direction are improved. On the basis of meeting the requirements of rigidity and strength, in order to further optimize the structure, one connecting rib plate 7 is arranged between the two roll frames at an angle of 60 degrees in the circumferential direction.
In order to avoid the above problems, dynamic balance is used as a step in the manufacturing process of the crushing roller, because the internal structure of the roller sleeve has non-workability, mass unevenness is generated during the manufacturing of the roller sleeve, unbalanced centrifugal force is generated during the rotation of the roller sleeve, and the crushing roller is axially offset to cause vibration. Namely, the assembly process of the invention also comprises the step of carrying out dynamic balance check on the roller shaft 8 and the roller sleeve 9 after the locking and fixing in the step three. The dynamic balance process equipment and the apparatus of the invention are as follows: dynamic balance support frame, deep groove bearing, amesdial, balanced weight.
As a preferred embodiment, as shown in fig. 2, the process flow of the dynamic balance check includes the following steps:
s1, assembling a deep groove bearing at a bearing position of a roll shaft 8, and mounting a roll sleeve 9 on a balance support;
s2, positioning a bearing at the first end of the roll shaft 8 in the XYZ axial direction; positioning a bearing at the second end of the roller shaft 8 in the YZ axial direction, contacting a dial indicator with the end surface of the bearing in the X axial direction, rotating the roller sleeve 9, and reading maximum and minimum data of the swing of the dial indicator;
s3, fixing the weighting block at the position of the end face of the roll width at the second end of the roll shaft 8, and rotating the roll sleeve 9 to enable the maximum reading of the swing of the dial indicator to be combined with the dynamic balance standard;
s4, dividing the weight of the weighting block into two parts, wherein one part is placed at the end face position of the first end of the roller shaft 8, and the other part is placed at the opposite position symmetrical to the end face of the first end;
s5, positioning the second end bearing in the XYZ axial direction, fixing the first end bearing in the YZ axial direction, contacting the bearing end face with a dial indicator in the X axial direction, rotating the roller sleeve 9, and verifying whether the maximum swing reading of the dial indicator meets the dynamic balance standard or not; if not, adjusting.
The problem that the roller is not loosened when the crushing roller is in service for multiple times of cycles is avoided; and the roller of the crushing roller is recycled for many times, so that the problem of block breakage is avoided. (1) The preferable material of the roller shaft is 42CrMo forged steel, and the 42CrMo material has excellent hardenability and hardenability; (2) optimizing the sectional dimension of the roll shaft, and optimizing the arc angle of each step (to prevent stress concentration); (3) the optimized roll shaft processing and heat treatment process comprises the following process flows in sequence: annealing and rough processing the forging stock, normalizing, quenching and tempering HRC 230-250, finish machining, detecting, warehousing and waiting for assembly.
The crushing roller manufactured by the invention has simple structure, convenient manufacture and light weight, and production practices prove that the roller sleeve in service for many times does not loosen and break blocks; the roll shaft is not broken; the roll surface does not need to be cut on line; the roller surface is welded to the drawing size through surfacing welding after uniform abrasion reaches a certain size, and the bearing is detected, so that the roller surface can be recycled, the maintenance is simple, the manufacturing and using cost is low, and the working strength of management and manufacturing personnel is reduced.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the idea of the invention, also features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.
The embodiments of the invention are intended to embrace all such alternatives, modifications and variances that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements and the like that may be made without departing from the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (8)
1. An assembly process of a fuel crushing roller for sintering iron ore is characterized by comprising the following steps:
step one, positioning a roll shaft on a tool platform;
step two, mounting the roller sleeve on a positioning step of the roller shaft after preheating;
and step three, locking and fixing the roll shaft and the roll width at one end of the roll sleeve through a locking assembly.
2. The process for assembling a fuel crushing roller for sintered iron ore according to claim 1, wherein the preheating is carried out by preheating the roller shell at 120 to 150 ℃ for 4 to 6 hours.
3. The process for assembling a fuel crushing roller for iron ore sintering according to claim 1, wherein the process further comprises the step of verifying the dynamic balance of the roller shaft and the roller shell after the step three locking and fixing.
4. The process for assembling a fuel crushing roller for a sintered iron ore according to claim 3, wherein the process flow for the dynamic balance check comprises the following steps:
s1, assembling a deep groove bearing at a bearing position of a roll shaft, and sleeving a roll on a balance support;
s2, defining two ends of the roll shaft as a first end and a second end respectively, and positioning a bearing at the first end of the roll shaft in an XYZ axial direction; positioning a bearing at the second end of the roll shaft in the YZ axial direction, contacting the end face of the bearing with a dial indicator in the X axial direction, rotating the roll sleeve, and reading maximum and minimum data of the swing of the dial indicator;
s3, fixing the weighting block at the position of the end face of the roll width at the second end of the roll shaft, and rotating the roll sleeve to enable the maximum reading of the swing of the dial indicator to be combined with the dynamic balance standard;
s4, dividing the weight of the weighting block into two parts, wherein one part is placed at the end face position of the first end of the roll shaft, and the other part is placed at the opposite position symmetrical to the end face of the first end;
s5, positioning the second end bearing in the XYZ axial direction, fixing the first end bearing in the YZ axial direction, contacting the end face of the bearing with a dial indicator in the X axial direction, rotating the roller sleeve, and verifying whether the maximum swing reading of the dial indicator meets the dynamic balance standard or not; if not, the adjustment is carried out again.
5. The process of assembling a fuel crushing roller for iron ore sintering according to claim 1, wherein the material of the roller shaft is 42CrMo forged steel, and each step of the roller shaft is provided with a circular arc angle.
6. The process of assembling a fuel crushing roller for a sintered iron ore according to claim 1, wherein in the second step, the roller shell is first aligned with the key of the roller shaft, and then the roller shell is mounted on the positioning step of the roller shaft by the engagement of the key with the key groove.
7. The process of assembling a fuel crushing roller for a sintered iron ore according to claim 6, wherein the key is a semicircular key and the key groove is a semicircular key groove.
8. The process for assembling a fuel crushing roller for iron sinter as claimed in claim 1, wherein the locking assembly of step three comprises a locking nut and a locking pin, the locking nut is sleeved on the roller shaft and is locked in contact with the outer side wall of the second end roller width, and the locking nut and the second end roller width are locked and fixed through the locking pin and the pin hole on the outer side wall of the second end roller width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210669001.XA CN115318376B (en) | 2022-06-14 | 2022-06-14 | Assembling process of fuel crushing roller for sintered iron ore |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210669001.XA CN115318376B (en) | 2022-06-14 | 2022-06-14 | Assembling process of fuel crushing roller for sintered iron ore |
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| CN115318376A true CN115318376A (en) | 2022-11-11 |
| CN115318376B CN115318376B (en) | 2024-02-13 |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN113510438A (en) * | 2021-05-26 | 2021-10-19 | 杭州奥星实业有限公司 | Supporting roll repairing process |
| CN214599379U (en) * | 2020-12-16 | 2021-11-05 | 四川川润股份有限公司 | Roller shell connecting structure of roller press |
| CN214767792U (en) * | 2020-11-30 | 2021-11-19 | 中钢集团邢台机械轧辊有限公司 | Upper pinch roll combination device of hot rolling coiler |
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2022
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| CN2262461Y (en) * | 1994-08-28 | 1997-09-17 | 陈德华 | Alloy combined roller |
| CN102371362A (en) * | 2010-08-25 | 2012-03-14 | 中国有色（沈阳）冶金机械有限公司 | Static and dynamic balance processing method for heavy-duty hollow roller way |
| CN102527468A (en) * | 2010-12-20 | 2012-07-04 | 朱华平 | Combined crushing roller |
| CN201978940U (en) * | 2011-04-02 | 2011-09-21 | 山东四方钢管设备制造有限公司 | Combined assembly roller |
| CN203343175U (en) * | 2013-06-21 | 2013-12-18 | 中钢集团邢台机械轧辊有限公司 | Horizontal roll of universal rolling mill |
| CN103567015A (en) * | 2013-11-02 | 2014-02-12 | 伍旭辉 | Bushing-type driving/driven roller of four-roller crusher |
| CN206483515U (en) * | 2017-01-18 | 2017-09-12 | 山东九昌重工科技有限公司 | The breaker roll of resistance to deformation |
| CN106734214A (en) * | 2017-03-13 | 2017-05-31 | 太原科技大学 | A kind of composite (back-up) roll for rolling wave type ripple composite plate |
| CN214767792U (en) * | 2020-11-30 | 2021-11-19 | 中钢集团邢台机械轧辊有限公司 | Upper pinch roll combination device of hot rolling coiler |
| CN214599379U (en) * | 2020-12-16 | 2021-11-05 | 四川川润股份有限公司 | Roller shell connecting structure of roller press |
| CN113510438A (en) * | 2021-05-26 | 2021-10-19 | 杭州奥星实业有限公司 | Supporting roll repairing process |
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| CN115318376B (en) | 2024-02-13 |
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