CN113977486A - Positioning mechanism for maintaining coaxiality of grinding discs of double-disc pulp grinder and assembling method - Google Patents
Positioning mechanism for maintaining coaxiality of grinding discs of double-disc pulp grinder and assembling method Download PDFInfo
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- CN113977486A CN113977486A CN202111265573.3A CN202111265573A CN113977486A CN 113977486 A CN113977486 A CN 113977486A CN 202111265573 A CN202111265573 A CN 202111265573A CN 113977486 A CN113977486 A CN 113977486A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
Abstract
The invention relates to the technical field of double-disc refiner installation, and discloses a positioning mechanism for keeping the coaxiality of grinding discs of a double-disc refiner. The positioning pin is matched with the machine body and the machine cover, and the coaxiality of the machine body and the machine cover can be effectively ensured by combining the positioning pin, the positioning hole and the positioning hole. The assembly method comprises the positioning mechanism and further comprises the following steps that a, the excircle of the machine body and the excircle of the machine cover are machined by taking the axis of the grinding sheet installation surface as a reference; b. the positioning plate, the machine cover and the machine body are connected through bolts; c. and processing a positioning pin hole on the cover and the machine body through a pin hole reference hole on the positioning plate, and inserting a positioning pin into the positioning pin hole.
Description
Technical Field
The invention relates to the technical field of double-disc refiner installation, in particular to a positioning mechanism for keeping the coaxiality of grinding discs of a double-disc refiner and an assembling method.
Background
The double-disc refiner body and the cover are assembled together in a hinge mode in the current market, and the hinge seats are respectively welded on the cover and the body in a matched mode. The hinge hole and the mandrel are in clearance fit to ensure smooth rotation of the hinge mechanism. The hinge mechanism is welded on the machine body and the machine cover in a matching way, and welding deformation can cause the core shaft to be clamped, so that the machine cover is difficult to rotate.
The cover and the accessory weight installed on the cover can lead to the cover to deflect by taking the upper hinge as the center, lead to the static abrasive disc of the cover and the dynamic abrasive disc of the rotary disc to be not coaxial, and the farther away from the hinge position, the larger the distance of the cover deflection. In the process of refining, part of the refining teeth do not participate in refining, because the refining quality has a great relationship with the tooth form angle formed between the dynamic and static refining discs, the deflection causes the change of the tooth form angle, the fiber form after refining can not achieve the expected effect, and the quality of the finished pulp is influenced.
Simultaneously the cover deflects and still can lead to the mounting hole on cover and the organism to take place the dislocation, and the bolt can be extruded between the mounting hole, and the dismouting bolt of forcing can lead to the bolt fracture, need make the cover reset with the help of lifting device or jack, accomplishes the dismouting of bolt.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the positioning mechanism for keeping the coaxiality of the grinding discs of the double-disc refiner, and the invention can ensure that the axes of the machine body and the machine cover are consistent through the positioning plate, the positioning hole and the shaft hole reference hole.
The invention also provides an assembling method, which takes the axis of the mounting surface of the grinding sheet as a processing and assembling reference, reduces excessive accumulated errors caused by excessive reference, and further avoids influencing the assembling accuracy.
In order to achieve the purpose, the invention adopts the technical scheme that:
the positioning mechanism for maintaining the coaxiality of the grinding discs of the double-disc refiner comprises a positioning plate and a positioning pin, wherein the positioning plate is provided with a positioning hole and a pin hole reference hole, and the positioning pin is arranged in the pin hole reference hole.
Further, positioning mechanism set up the junction at organism and cover, organism one side be equipped with and be used for offsetting the flagging jackscrew structure of cover.
Further, the jackscrew structure include jackscrew board and jackscrew, cover one side be equipped with the jackscrew board, the jackscrew board on be equipped with the jackscrew, the jackscrew lower extreme contradict on the organism.
Furthermore, a cover hinge seat is installed on one side of the machine body through bolts and connected with the machine cover through a mandrel.
Furthermore, the machine body and the machine cover are respectively provided with a connecting hole, a bolt is arranged in the connecting hole, and the connecting hole and the positioning hole are coaxial.
Furthermore, the cover and the machine body are both provided with positioning pin holes, and the pin hole reference hole and the positioning pin holes are coaxial.
Furthermore, the cross section of the positioning plate is of an L-shaped structure, and the size of an inner ring at an inner right angle of the positioning plate is consistent with that of an outer ring of the machine body or the machine cover.
Furthermore, a grinding disc and a rotary disc are arranged between the machine body and the machine cover, and the axis of the grinding disc mounting surface is consistent with the axes of the machine body and the machine cover.
The assembling method for maintaining the coaxiality of the grinding discs of the double-disc refiner comprises the positioning mechanism and further comprises the following steps:
a. processing the excircle of the machine body and the machine cover by taking the axis of the grinding sheet mounting surface as a reference;
b. the positioning plate, the machine cover and the machine body are connected through bolts;
c. processing a positioning pin hole on the cover and the machine body through a pin hole reference hole on the positioning plate, and inserting a positioning pin into the positioning pin hole;
d. respectively connecting a machine cover and a machine cover hinge base, and connecting the machine cover hinge base and a machine body;
f. and after all the steps are finished, transferring to an assembly workshop to carry out the assembly process of the double-disc pulping machine.
Furthermore, a step e is arranged between the step d and the step f, and the step e is to weld a jackscrew structure on the outer circle of the machine cover.
The invention has the following beneficial effects:
1. the invention has simple structure, the bolt is installed through the positioning hole on the positioning plate, so that the random movement of the machine body and the machine cover is limited, and the position of the positioning pin hole is determined through the pin hole datum hole on the positioning plate, so that the positioning pin is matched with the machine body and the machine cover, and the coaxiality of the machine body and the machine cover can be effectively ensured by combining the positioning pin with the machine body and the machine cover, thereby ensuring the contact effect of the grinding disc and further ensuring the pulping quality.
2. According to the invention, one end of the mandrel is connected with the shaft hole of the machine cover, the other end of the mandrel is connected with the hinge base of the machine cover, and the hinge base of the machine cover is connected with the machine body through the bolt.
3. According to the invention, through the jackscrew structure and the hinge mechanism, the cover can be effectively prevented from deflecting on the machine body, so that bolts are prevented from being clamped in the mounting holes or the connecting holes, the positioning pins are prevented from being clamped in the pin hole reference holes or the positioning pin holes, and the cover can be smoothly opened during maintenance.
4. The invention can ensure the coaxiality of the machine body and the machine cover through the mounting hole and the shaft hole reference hole on the positioning mechanism, and also reduces excessive accumulated errors caused by excessive references because the device takes the axis of the grinding sheet mounting surface as a processing and assembling reference, ensures the coaxiality of the grinding sheet and further ensures the grinding effect.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a left side view of fig. 1.
Description of reference numerals:
1-machine body, 2-machine cover, 3-static grinding plate, 4-rotary table, 5-dynamic grinding plate, 6-grinding plate mounting surface axis, 7-positioning plate, 8-mounting hole, 9-connecting hole, 10-bolt, 11-pin hole reference hole, 12-positioning pin, 13-machine cover hinge seat, 14-mandrel, 15-jackscrew plate and 16-jackscrew.
Detailed Description
For a better understanding of the present invention, reference is made to the following further description taken in conjunction with the accompanying drawings. It is noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example 1
As shown in fig. 1 and 2, the double disc refiner comprises a body 1, a cover 2, a grinding plate, a rotary disc 4, a transmission shaft and the like, wherein a cover hinge base 13 is arranged on one side of the body 1 through a bolt 10, and the position of the cover hinge base 13 can be adjusted without welding. The cover 2 is provided with a shaft hole for the core shaft 14 to pass through, the cover hinge base 13 is connected with the cover 2 through the core shaft 14, and the core shaft 14 and the cover hinge base 13 form a hinge mechanism, so that the cover 2 can be opened.
The mode that cover hinge mount 13 is connected through bolt 10 with organism 1, not only simple structure, convenient operation, but also can avoid because of the hinge pin hole decentraction that welding deformation leads to, prevent that dabber 14 from blocking the carousel 4 rotation difficulty that leads to.
A grinding disc and a rotary disc 4 are arranged between the machine body 1 and the machine cover 2, the grinding disc comprises a static grinding disc 3 and a dynamic grinding disc 5, and the axis 6 of the grinding disc installation surface is consistent with the axes of the machine body 1 and the machine cover 2.
The machine cover 2 and the machine body 1 adopt the axis 6 of the grinding sheet mounting surface as a reference to process an excircle to the same size, and the dimensional tolerance grades are the same. The axis 66 of the grinding sheet mounting surface is used as a processing and assembling reference, so that excessive accumulated errors caused by excessive reference are reduced, and the subsequent assembling accuracy is improved.
In order to maintain the coaxiality of the grinding plates, a positioning mechanism is further arranged between the cover 2 and the machine body 1 and comprises a positioning plate 7 and a positioning pin 12. The positioning mechanisms are arranged at least three and are uniformly distributed on the outer sides of the machine cover 2 and the machine body 1.
The locating plate 7 be with cover 2 excircle assorted arc structure, just locating plate 7 cross-section be L type structure, the inner circle size of its interior right angle department is unanimous with organism 1 or cover 2's outer lane size.
The positioning plate 7 is provided with a positioning hole and a pin hole reference hole 11, the cover 2 and the machine body 1 are provided with a positioning pin hole according to the pin hole reference hole 11, and the pin hole reference hole 11 and the positioning pin hole are coaxial.
The locating pin 12 is arranged in the pin hole reference hole 11 and the locating pin hole, and the locating pin 12 is installed in the locating pin hole to ensure that the cover 2 cannot deflect and ensure the coaxiality of the grinding plate.
The machine body 1 and the machine cover 2 are respectively provided with a connecting hole 9, a bolt 10 is arranged in the connecting hole 9, and the connecting hole 9 and the positioning hole are coaxial.
When the positioning plate is used, the mounting hole 8 of the positioning plate 7 is aligned with the connecting holes 9 on the machine body 1 and the machine cover 2, so that the bolt 10 sequentially penetrates through the mounting hole 8 and the connecting holes 9, and the positioning plate 7, the machine body 1 and the machine cover 2 are connected together. Then, the positioning pin holes on the machine body 1 and the machine cover 2 are processed through the pin hole reference holes 11 on the positioning plate 7, and the positioning pins 12 are installed in the positioning pin holes after the positioning pin holes are processed.
The positioning plate 7 is matched with the bolts 10 on the positioning plate to be used, so that the movement of the machine body 1 and the machine cover 2 can be limited in a plurality of directions, and the coaxiality of the machine body 1 and the machine cover 2 can be ensured all the time by matching with the positioning pins 12, so that the use is smooth.
Example 2
On the basis of embodiment 1, the assembling method for maintaining the coaxiality of the grinding plates of the double-disc refiner comprises the positioning mechanism and further comprises the following steps:
a. and processing the excircles of the machine body 1 and the machine cover 2 by taking the axis 6 of the mounting surface of the grinding sheet as a reference to ensure that the dimensional tolerance grades are the same.
b. Connect locating plate 7, cover 2 and organism 1 through bolt 10, adopt locating plate 7 more than three during the installation, follow cover 2 outward flange evenly distributed with locating plate 7, ensure that 7 inner walls of locating plate and 1 excircle of organism are laminated completely, link together locating plate 7, cover 2 and organism 1 through mounting hole 8, connecting hole 9 with bolt 10 in proper order this moment. In addition, the bolt 10 is inserted through the connecting hole 9 without the positioning plate 7.
The positioning plates 7 can ensure that the positions of the cover 2 and the machine body 1 cannot deviate in any direction and always keep the coaxiality requirement.
c. Positioning pin holes on the cover 2 and the machine body 1 are processed through pin hole reference holes 11 on the positioning plate 7, and positioning pins 12 are inserted into the positioning pin holes. The positioning pin 12 is arranged in the positioning pin hole to ensure that the cover 2 cannot deflect and ensure the coaxiality of the grinding plate.
d. The cover 2 and the cover hinge base 13 are respectively connected with the machine body 1 through the cover hinge base 13. The mandrel 14 respectively passes through the shaft hole on the cover 2 and the shaft hole on the cover hinge base 13, the position of the cover hinge base 13 on the machine body 1 is adjusted, and the cover hinge base 13 and the machine body 1 are connected together by using the bolt 10.
f. And after all the steps are finished, transferring to an assembly workshop to carry out the assembly process of the double-disc pulping machine.
Example 3
On the basis of the embodiment 2, a top thread 16 structure for offsetting the droop of the cover 2 is arranged on one side of the machine body 1. The jackscrew 16 structure is located the offside of hinge mechanism, through the setting of jackscrew 16 mechanism, dismantles the bolt 10 and the locating pin 12 of being connected with organism 1 on the cover 2 during convenient maintenance.
The jackscrew 16 structure include jackscrew board 15 and jackscrew 16, 2 one side of cover be equipped with jackscrew board 15, jackscrew board 15 on be equipped with jackscrew 16, 16 lower extremes of jackscrew contradict on organism 1, 16 and organism 1 do not have the connection of jackscrew.
And a step e is arranged between the step d and the step f, and the step e is a structure that a jackscrew 16 is welded on the outer circle of the machine cover 2. The jackscrew 16 structure is used when the cover 2 sags, and is used for counteracting the sagging of the cover 2.
If the cover 2 has flagging phenomenon, the flagging of cover 2 is downthehole with locating pin 12 card in the locating pin, and it wastes time and energy to open cover 2. At this time, the jackscrew 16 is rotated first, and the jackscrew 16 moves downward along the jackscrew plate 15, so that the distance between the jackscrew plate 15 and the machine body 1 in the vertical direction is increased, the machine cover 2 is jacked up, the state that the positioning pin 12 is clamped with the positioning pin hole is released, and then the bolt 10 and the positioning pin 12 are disassembled. Finally, the jackscrew 16 is moved reversely, so that a gap is formed between the jackscrew 16 and the machine body 1, and the machine cover 2 is convenient to open.
Claims (10)
1. The positioning mechanism for maintaining the coaxiality of the grinding discs of the double-disc refiner comprises a positioning plate and a positioning pin and is characterized in that the positioning plate is provided with a positioning hole and a pin hole reference hole, and the positioning pin is arranged in the pin hole reference hole.
2. A positioning mechanism for maintaining coaxiality of grinding discs of a double-disc refiner according to claim 1, wherein the positioning mechanism is arranged at the joint of a machine body and a machine cover, and a top thread structure for counteracting the drooping of the machine cover is arranged on one side of the machine body.
3. A positioning mechanism for a double-disc refiner according to claim 2, wherein the jackscrew structure comprises a jackscrew plate and a jackscrew, the jackscrew plate is arranged on one side of the cover, the jackscrew is arranged on the jackscrew plate, and the lower end of the jackscrew abuts against the refiner body.
4. A positioning mechanism for maintaining coaxiality of grinding discs of a double disc refiner according to claim 3, wherein a cover hinge base is mounted on one side of the refiner body by bolts, and the cover hinge base is connected with the cover by a mandrel.
5. A positioning mechanism for a double-disc refiner according to claim 4, wherein the machine body and the cover are respectively provided with a connecting hole, a bolt is arranged in the connecting hole, and the connecting hole and the positioning hole are coaxial.
6. A positioning mechanism for a double-disc refiner according to claim 5, wherein the cover and the body are provided with positioning pin holes, and the pin hole reference hole is coaxial with the positioning pin holes.
7. A positioning mechanism for a double-disc refiner of claim 6 for maintaining the coaxiality of refiner plates, wherein the cross section of the positioning plate is L-shaped, and the inner circle of the positioning plate at the inner right angle has the same size as the outer circle of the refiner body or the refiner cover.
8. A positioning mechanism for maintaining coaxiality of refiner plates of a double disc refiner according to claim 7, wherein a refiner plate and a rotary disc are arranged between the refiner body and the refiner cover, and the axis of a refiner plate mounting surface is consistent with the axes of the refiner body and the refiner cover.
9. An assembly method for maintaining blade coaxiality in a double disc refiner, comprising the positioning mechanism of any one of claims 2-8, further comprising the step of,
a. processing the excircle of the machine body and the machine cover by taking the axis of the grinding sheet mounting surface as a reference;
b. the positioning plate, the machine cover and the machine body are connected through bolts;
c. processing a positioning pin hole on the cover and the machine body through a pin hole reference hole on the positioning plate, and inserting a positioning pin into the positioning pin hole;
d. respectively connecting a machine cover and a machine cover hinge base, and connecting the machine cover hinge base and a machine body;
f. and after all the steps are finished, transferring to an assembly workshop to carry out the assembly process of the double-disc pulping machine.
10. An assembly method for maintaining blade coaxiality in a double disc refiner according to claim 9, wherein step e is provided between step d and step f, and step e is a step of welding a jackscrew structure on the outer circle of the cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111265573.3A CN113977486B (en) | 2021-10-28 | 2021-10-28 | Positioning mechanism for maintaining coaxiality of grinding sheets of double-disc pulping machine and assembling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111265573.3A CN113977486B (en) | 2021-10-28 | 2021-10-28 | Positioning mechanism for maintaining coaxiality of grinding sheets of double-disc pulping machine and assembling method |
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| Publication Number | Publication Date |
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| CN113977486A true CN113977486A (en) | 2022-01-28 |
| CN113977486B CN113977486B (en) | 2023-10-20 |
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|---|---|
| CN113977486B (en) | 2023-10-20 |
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