CN111571168A - Method and tool for assembling grinding shell and grinding cover of double-disc pulping machine in interchangeable welding and centering manner - Google Patents
Method and tool for assembling grinding shell and grinding cover of double-disc pulping machine in interchangeable welding and centering manner Download PDFInfo
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- CN111571168A CN111571168A CN202010446517.9A CN202010446517A CN111571168A CN 111571168 A CN111571168 A CN 111571168A CN 202010446517 A CN202010446517 A CN 202010446517A CN 111571168 A CN111571168 A CN 111571168A
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- grinding
- pin shaft
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- shaft seat
- shell
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
The invention discloses a method and an assembly tool for interchanging, welding and centering a grinding shell and a grinding cover of a double-disc refiner, which comprise mounting seats arranged at intervals and an assembly plate matched with the grinding cover for use, wherein the mounting seats are connected with the assembly plate through connecting parts; according to the invention, the reference pin shaft seat is arranged on the assembling tool and the grinding shell, the reference pin shaft seat and the grinding cover pin shaft seat are welded in an exchange manner, so that the assembly welding and assembling efficiency can be effectively improved, the grinding shell and the grinding cover group are not deformed after being welded in a fixed manner, the dimensional accuracy and concentricity of each part are ensured, excessive accumulated errors are avoided, and the quality of the assembled product of the grinding shell and the grinding cover is greatly improved.
Description
Technical Field
The invention relates to the technical field of papermaking equipment assembly, in particular to a shell grinding and cover grinding exchange welding centering assembly method and an assembly tool of a double-disc pulp grinder.
Background
The mill shell and the mill cover of the RF series double-disc refiner are required to be interchangeable during assembly, and the phenomenon of loss or damage can occur when a customer normally uses the refiner; if the grinding cover is not interchangeable, the maintenance of a customer is extremely inconvenient, the modification which is labor-consuming and time-consuming for the customer can be caused, and the cost of the customer is increased. However, when normal assembly welding is carried out, assembly welding is carried out in place by scribing according to the drawing size, the efficiency is obviously low, the size of a component is not accurate in place, accumulated errors exist, welding is easy to deform, concentricity cannot be guaranteed, and the like.
The invention relates to a multistage part concentric assembly device and a method, wherein the publication date is 20191129, and the publication number is CN110509221A, and the invention discloses a multistage part concentric assembly device and a method, wherein the multistage part concentric assembly device comprises a cross support frame, a positioning block and a sliding guide structure; two positioning blocks are respectively fixed on four brackets of the cross-shaped support frame, a sliding guide structure is arranged between the two positioning blocks on each bracket, and a sliding stop block is arranged on each sliding guide structure; the positioning block is provided with a threaded hole. After the first workpiece and the second workpiece on the inner ring and the outer ring are fixed, the sliding stop block can move up and down flexibly, and the third workpiece and the fourth workpiece can move flexibly when the blades are assembled, so that the normal assembly of parts on the positioning blocks is not influenced, and the assembly efficiency is improved; after the blades are assembled in place, the fourth workpiece is restrained at a set position by a sliding stop block, and the concentricity requirement is directly ensured to be within 0.2; the assembly precision is not influenced by the deformation of the thin-wall zero fourth workpiece in the assembly process, and meanwhile, the fourth workpiece can be corrected by adjusting the position of the sliding stop block. According to the technical scheme, the problems that the whole assembly process and the centering assembly link have certain uncertainty, the assembly quality and efficiency of parts are low, the expected effect cannot be achieved, and the production is restricted are solved, but the problems that accumulated errors are generated during assembly of the grinding shell and the grinding cover, welding is easy to deform, and concentricity cannot be guaranteed are not solved.
The invention relates to a device and a method for concentrically assembling multistage parts, which are disclosed as 20191018 and CN110340639A, and relates to a high-precision self-centering assembling device for a shaft hole, comprising a shaft sleeve fixing device arranged on a workbench of a press machine and a shaft fixing device arranged on a press head of the press machine; the shaft sleeve fixing device comprises a bottom mounting table and a shaft sleeve mounting seat, the bottom mounting table is a sliding table structure capable of automatically translating and adjusting positions along the X axis and the Y axis, the shaft sleeve mounting seat is mounted at the upper end of the bottom mounting table, a mounting hole is formed in the shaft sleeve mounting seat, and a lower guide matching surface is formed on the outer side surface of the shaft sleeve mounting seat; the shaft fixing device comprises an upper mounting table and a shaft mounting seat, the upper mounting table is a flexible mounting table structure which can automatically rotate and deflect along the X axis and the Y axis, the shaft mounting seat is fixedly arranged at the lower end of the upper mounting table, a guide cavity is arranged on the shaft mounting seat, an upper guide matching surface is formed on the side surface of the guide cavity, a shaft mounting column is arranged at the center of the guide cavity, and a shaft inserting hole and an elastic clamping structure are arranged at the lower end of the shaft mounting column. The device realizes high-precision self-centering assembly of the shaft hole, and improves the assembly precision and the assembly yield. Above-mentioned technical scheme has solved and has realized the high accuracy from the centering assembly of shaft hole, has improved the problem of assembly precision and assembly yields, but does not relate to and solves and grind accumulated error when the shell is assembled with the mill cover, welds yielding, and the concentricity can not obtain the problem of guarantee.
Disclosure of Invention
The invention aims to solve the problems and adopts the technical scheme that:
the utility model provides a grind assembly fixture of shell and mill lid, includes the mount pad that the interval set up and the assembly plate that uses with the cooperation of mill lid, be connected through connecting portion between mount pad and the assembly plate, be equipped with on the assembly plate with grind the locating hole that the screw corresponds on the lid terminal surface, it is equipped with the benchmark round pin axle bed that is used for cooperation installation mill lid round pin axle bed to lie in connecting portion one side on the mount pad, and benchmark round pin axle bed is for grinding shell round pin axle bed, the mounting hole of benchmark round pin axle bed and the coaxial setting of mounting hole of the mill lid round pin axle bed that grinds covered, the cartridge has the centering axle in the mounting hole of benchmark round pin axle bed.
Furthermore, the reference pin shaft bases are provided with a plurality of reference pin shaft bases, and the mounting holes of all the reference pin shaft bases are coaxially arranged.
Furthermore, a reinforcing rib is arranged between the reference pin shaft seat and the mounting seat.
Further, the assembly plate is a flange.
Furthermore, the middle part of the assembling plate is provided with a matching hole for inserting a protruding part at the lower end of the grinding cover.
An interchangeable welding centering assembly method of a grinding shell and a grinding cover based on an assembly tool is characterized by comprising the following steps:
a. placing an installation seat of an assembly tool on a workshop steel plate platform, pulling out a centering shaft, enabling a protruding part at the lower end of a hoisting grinding cover to penetrate through a matching hole to enable the grinding cover to be matched and sleeved with the upper end of an assembly plate, adjusting the matching angle of the grinding cover and the assembly plate, ensuring that a positioning hole in the assembly plate is coaxially and correspondingly arranged with a screw hole in the end face of the grinding cover, simultaneously enabling the position of a grinding cover installation grinding cover pin shaft seat to correspond to a reference pin shaft seat, and inserting bolts into the positioning hole and the screw hole to realize positioning installation of the grinding cover and the assembly plate;
b. sequentially passing a centering shaft through a mounting hole of a reference pin shaft seat and a mounting hole of a grinding cover pin shaft seat to realize centering arrangement of the grinding cover pin shaft seat, adjusting the grinding cover pin shaft seat to correspond to the end face welding part of a grinding cover, and then welding the grinding cover pin shaft seat on the end face of the grinding cover;
c. after welding is finished and the grinding cover is cooled, firstly, the bolts in the positioning holes and the screw holes are disassembled, then the centering shaft is pulled out from the mounting hole of the base pin shaft seat and the mounting hole of the grinding cover pin shaft seat, the mounting plate is separated from the grinding cover, and the grinding cover is lifted away by a crane to be mounted with the grinding shell;
d. placing the grinding shell on an installation table, hoisting a grinding cover at the assembly position of the grinding shell by a crane, moving the grinding cover to enable the lower end surface of the grinding cover to be matched with the upper end surface of the grinding shell, adjusting the matching angle of the grinding cover and the grinding shell, ensuring that a screw hole on the upper end surface of the grinding shell is coaxially and correspondingly arranged with a screw hole on the end surface of the grinding cover, simultaneously enabling the position of a pin shaft seat of the grinding shell to correspond to the position of a pin shaft seat for installing the grinding cover, and inserting a bolt into the screw hole to realize the positioning installation of the grinding cover and the grinding shell;
e. sequentially penetrating the centering shaft through the mounting hole of the grinding shell pin shaft seat and the mounting hole of the grinding cover pin shaft seat to realize the positioning arrangement of the grinding shell pin shaft seat, adjusting the positions of the grinding shell pin shaft seat and the welding position on the grinding shell to be corresponding, and then welding the grinding shell pin shaft seat on the end surface of the grinding shell;
f. after welding is completed, after the grinding shell is cooled, the centering shaft is pulled out from the mounting hole of the grinding shell pin shaft seat and the mounting hole of the grinding cover pin shaft seat, the split short pin shaft is inserted into the mounting hole of the grinding shell pin shaft seat and the mounting hole of the grinding cover pin shaft seat, finally the short pin shaft is tightly jacked by a jacking screw, and the grinding shell is transferred to an assembly workshop after welding is completed. The invention has the following beneficial effects:
the invention relates to an interchangeable welding centering assembly method of a grinding shell and a grinding cover, which comprises the steps of firstly using an assembly tool as an assembly reference, realizing positioning and installation of a grinding cover pin shaft seat on the grinding cover through the matching of a centering shaft and a reference pin shaft seat which are installed on the assembly tool, then using the grinding cover as an assembly reference, and realizing positioning and installation of the reference pin shaft seat on the grinding shell through the matching of the centering shaft and the grinding cover pin shaft seat.
The assembly tool provided by the invention has the advantages of simple appearance structure, low price and convenience in use, and can accurately realize positioning and installation of the grinding cover pin shaft seat on the grinding cover and ensure the accuracy of the installation size.
Drawings
FIG. 1 is a front view of the assembly fixture of the present invention;
FIG. 2 is a left side view of the assembly fixture of the present invention;
FIG. 3 is a front view of the grinding cap of the present invention;
FIG. 4 is a left side view of the grinding cap of the present invention;
FIG. 5 is a schematic view of the installation of the grinding cover and the assembly fixture of the present invention;
FIG. 6 is a schematic view of the installation of the grinding cap and grinding shell of the present invention without welding the grinding cap pin shaft seat and the reference pin shaft seat;
FIG. 7 is a schematic view of the mounting of the grinding cap and grinding shell of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 7, an assembly fixture for a grinding shell and a grinding cover comprises mounting seats 1 arranged at intervals and an assembly plate 3 used in cooperation with a grinding cover 6, wherein preferably, in the embodiment, the assembly plate 3 is a flange; the mounting base 1 and the mounting plate 3 are connected through a connecting portion 2, in this embodiment, the connecting portion 2 is a cylindrical structure, the mounting plate 3 is provided with a positioning hole 31 corresponding to a screw hole 62 on the end surface of the grinding cover 6, a reference pin shaft seat 4 for matching and mounting the grinding cover pin shaft seat 61 is arranged on one side of the connecting portion 2 on the mounting base 1, the reference pin shaft seat 4 is a grinding shell pin shaft seat 71, the reference pin shaft seat 4 and the grinding shell pin shaft seat 71 have the same structure, and the mounting hole of the reference pin shaft seat 4 and the mounting hole of the grinding cover pin shaft seat 61 on the grinding cover 6 are coaxially arranged; and a centering shaft 5 is inserted into the mounting hole of the reference pin shaft seat 4.
As shown in fig. 1-7, in the preferred embodiment, the fitting plate 3 is provided with a fitting hole 32 at the middle, and a protrusion 63 at the lower end of the grinding cover 6 passes through the fitting hole 32 to fit the grinding cover 6 on the upper end of the fitting plate 3.
The working process of the invention is as follows:
as shown in fig. 1-7, a, placing an installation seat 1 of an assembly fixture on a workshop steel plate platform, pulling out a centering shaft 5, hoisting a protruding part 63 at the lower end of a grinding cover 6 to pass through a matching hole 32 so that the grinding cover 6 is matched and sleeved with the upper end of an assembly plate 3, adjusting the matching angle of the grinding cover 6 and the assembly plate 3, ensuring that a positioning hole 31 on the assembly plate 3 and a screw hole 62 on the end surface of the grinding cover 6 are coaxially and correspondingly arranged, simultaneously enabling the position of the grinding cover 6 for installing a grinding cover pin shaft seat 61 to correspond to a reference pin shaft seat 4, and inserting bolts into the positioning hole 31 and the screw hole 62 to realize the positioning and installation of the grinding cover 6 and;
b. sequentially penetrating the centering shaft 5 through the mounting hole of the reference pin shaft seat 4 and the mounting hole of the grinding cover pin shaft seat 61 to realize the positioning arrangement of the grinding cover pin shaft seat 61, adjusting the welding position of the grinding cover pin shaft seat 61 and the upper end surface of the grinding cover 6 to be corresponding, and then welding the grinding cover pin shaft seat 61 on the upper end surface of the grinding cover 6;
c. after welding is finished, after the grinding cover 6 is cooled, firstly, the bolts in the positioning holes 31 and the screw holes 62 are disassembled, then the centering shaft 5 is pulled out from the mounting holes of the reference pin shaft seat 4 and the grinding cover pin shaft seat 61, the assembling plate 3 is separated from the grinding cover 6, and the grinding cover 6 is lifted away by a crane to be mounted with the grinding shell 7;
d. placing the grinding shell 7 on an installation table, hoisting the grinding cover 6 at the assembly position of the grinding shell 7 through a crane, moving the grinding cover 6 to enable the lower end surface of the grinding cover 6 to be matched with the upper end surface of the grinding shell 7, adjusting the matching angle of the grinding cover 6 and the grinding shell 7, ensuring that a screw hole 62 on the upper end surface of the grinding shell 7 is coaxially and correspondingly arranged with a screw hole 62 on the end surface of the grinding cover 6, simultaneously enabling the position of the grinding shell 7 for installing the grinding shell pin shaft seat 71 to be corresponding to the position of the grinding cover 6 for installing the grinding shell pin shaft seat 61, and inserting a bolt into the screw hole 62 to realize the positioning installation of the grinding cover 6 and the grinding shell;
e. sequentially penetrating the centering shaft 5 through a mounting hole of the grinding shell pin shaft seat 71 and a mounting hole of the grinding cover pin shaft seat 61 to realize the positioning arrangement of the grinding shell pin shaft seat 71, adjusting the position of the grinding shell pin shaft seat 71 to correspond to the position of a welding position on the grinding cover 7, and then welding the grinding shell pin shaft seat 71 on the end surface of the grinding shell 7;
f. after the welding is finished, after the grinding shell 7 is cooled, the centering shaft 5 is pulled out from the mounting hole of the grinding shell pin shaft seat 71 and the mounting hole of the grinding cover pin shaft seat 61, the split short pin shaft is inserted into the mounting hole of the grinding shell pin shaft seat 71 and the mounting hole of the grinding cover pin shaft seat 61, finally the short pin shaft is tightly jacked by a jacking screw, and the assembly workshop is transferred to after the welding is finished, as shown in fig. 7.
The invention is a method for assembling grinding shell and grinding cover by interchanging welding centering, firstly using an assembling tool as an assembling reference, firstly realizing the positioning and installation of a grinding cover pin shaft seat 61 on a grinding cover 6 by a centering shaft 5 arranged on the assembling tool, then using the grinding cover 6 as an assembling reference, realizing the positioning and installation of a grinding shell pin shaft seat 71 on a grinding shell 7 by the centering shaft 5, the method can effectively improve the assembly welding and assembling efficiency, the grinding shell 7 and the grinding cover 6 do not deform after the assembly welding, the dimensional precision of each part is accurate, the concentricity is accurate, excessive accumulated errors are avoided, the purposes of saving energy and reducing consumption by manpower are achieved, and the quality of the assembled products of the grinding shell 7 and the grinding cover 6 is greatly improved.
The present embodiment is not intended to limit the shape, material, structure, etc. of the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
In the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the scope of the present invention.
If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the use of "first" and "second" is merely for convenience in describing the invention and to simplify the description, and unless otherwise stated the above words are not intended to have a special meaning.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, but such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. Two dish fiberizers grinds shell and grinds interchange welding centering assembly fixture of lid, its characterized in that, including the mount pad that the interval set up and with the assembly plate that the cooperation of mill lid was used, be connected through connecting portion between mount pad and the assembly plate, be equipped with on the assembly plate with grind the locating hole that the screw corresponds on the lid terminal surface, lie in connecting portion one side on the mount pad and be equipped with the benchmark round pin axle bed that is used for cooperation installation mill lid round pin axle bed, benchmark round pin axle bed is mill shell round pin axle bed, the mounting hole of benchmark round pin axle bed and the coaxial setting of mounting hole of mill lid round pin axle bed that grinds and cover, the cartridge has the centering axle in the mounting hole of benchmark round pin axle bed.
2. The interchangeable weld centering assembly fixture for a refiner housing and a refiner cover of a double disc refiner of claim 1, wherein the reference pin shaft base is provided in plurality and the mounting holes of all the reference pin shaft bases are coaxially provided.
3. The assembly fixture for the refiner housing and the refiner cover of a double-disc refiner according to claim 2, wherein a reinforcing rib is arranged between the reference pin shaft seat and the mounting seat.
4. The interchangeable weld centering assembly fixture for a refiner housing and refiner cover of a double disc refiner of claim 3, wherein said assembly plate is a flange.
5. The tooling of claim 4, wherein the middle part of the assembly plate is provided with a matching hole for inserting the protruding part at the lower end of the grinding cover.
6. The method for the interchangeable welding centering assembly of the casing and the cover of the double-disc refiner based on the interchangeable welding centering assembly tool of the casing and the cover of the double-disc refiner of any one of claims 1 to 5 is characterized by comprising the following steps:
a. placing an installation seat of an assembly tool on a workshop steel plate platform, pulling out a centering shaft, enabling a protruding part at the lower end of a hoisting grinding cover to penetrate through a matching hole to enable the grinding cover to be matched and sleeved with the upper end of an assembly plate, adjusting the matching angle of the grinding cover and the assembly plate, ensuring that a positioning hole in the assembly plate is coaxially and correspondingly arranged with a screw hole in the end face of the grinding cover, simultaneously enabling the position of a grinding cover installation grinding cover pin shaft seat to correspond to a reference pin shaft seat, and inserting bolts into the positioning hole and the screw hole to realize positioning installation of the grinding cover and the assembly plate;
b. sequentially passing a centering shaft through a mounting hole of a reference pin shaft seat and a mounting hole of a grinding cover pin shaft seat to realize centering arrangement of the grinding cover pin shaft seat, adjusting the grinding cover pin shaft seat to correspond to the end face welding part of a grinding cover, and then welding the grinding cover pin shaft seat on the end face of the grinding cover;
c. after welding is finished and the grinding cover is cooled, firstly, the bolts in the positioning holes and the screw holes are disassembled, then the centering shaft is pulled out from the mounting hole of the base pin shaft seat and the mounting hole of the grinding cover pin shaft seat, the mounting plate is separated from the grinding cover, and the grinding cover is lifted away by a crane to be mounted with the grinding shell;
d. placing the grinding shell on an installation table, hoisting a grinding cover at the assembly position of the grinding shell by a crane, moving the grinding cover to enable the lower end surface of the grinding cover to be matched with the upper end surface of the grinding shell, adjusting the matching angle of the grinding cover and the grinding shell, ensuring that a screw hole on the upper end surface of the grinding shell is coaxially and correspondingly arranged with a screw hole on the end surface of the grinding cover, simultaneously enabling the position of a pin shaft seat of the grinding shell to correspond to the position of a pin shaft seat for installing the grinding cover, and inserting a bolt into the screw hole to realize the positioning installation of the grinding cover and the grinding shell;
e. sequentially penetrating the centering shaft through the mounting hole of the grinding shell pin shaft seat and the mounting hole of the grinding cover pin shaft seat to realize the positioning arrangement of the grinding shell pin shaft seat, adjusting the positions of the grinding shell pin shaft seat and the welding position on the grinding shell to be corresponding, and then welding the grinding shell pin shaft seat on the end surface of the grinding shell;
f. after welding is completed, after the grinding shell is cooled, the centering shaft is pulled out from the mounting hole of the grinding shell pin shaft seat and the mounting hole of the grinding cover pin shaft seat, the split short pin shaft is inserted into the mounting hole of the grinding shell pin shaft seat and the mounting hole of the grinding cover pin shaft seat, finally the short pin shaft is tightly jacked by a jacking screw, and the grinding shell is transferred to an assembly workshop after welding is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010446517.9A CN111571168B (en) | 2020-05-25 | 2020-05-25 | Method and tool for assembling grinding shell and grinding cover of double-disc pulping machine in interchangeable welding and centering manner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010446517.9A CN111571168B (en) | 2020-05-25 | 2020-05-25 | Method and tool for assembling grinding shell and grinding cover of double-disc pulping machine in interchangeable welding and centering manner |
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| Publication Number | Publication Date |
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| CN111571168A true CN111571168A (en) | 2020-08-25 |
| CN111571168B CN111571168B (en) | 2021-04-02 |
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| CN202010446517.9A Active CN111571168B (en) | 2020-05-25 | 2020-05-25 | Method and tool for assembling grinding shell and grinding cover of double-disc pulping machine in interchangeable welding and centering manner |
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Cited By (1)
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| CN113977486A (en) * | 2021-10-28 | 2022-01-28 | 山东杰锋机械制造有限公司 | Positioning mechanism for maintaining coaxiality of grinding discs of double-disc pulp grinder and assembling method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113977486A (en) * | 2021-10-28 | 2022-01-28 | 山东杰锋机械制造有限公司 | Positioning mechanism for maintaining coaxiality of grinding discs of double-disc pulp grinder and assembling method |
| CN113977486B (en) * | 2021-10-28 | 2023-10-20 | 山东杰锋机械制造有限公司 | Positioning mechanism for maintaining coaxiality of grinding sheets of double-disc pulping machine and assembling method |
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| Publication number | Publication date |
|---|---|
| CN111571168B (en) | 2021-04-02 |
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