CN202639486U - Axial clearance eliminate mechanism of trimming disc scissors shaft - Google Patents
Axial clearance eliminate mechanism of trimming disc scissors shaft Download PDFInfo
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- CN202639486U CN202639486U CN 201220269209 CN201220269209U CN202639486U CN 202639486 U CN202639486 U CN 202639486U CN 201220269209 CN201220269209 CN 201220269209 CN 201220269209 U CN201220269209 U CN 201220269209U CN 202639486 U CN202639486 U CN 202639486U
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- cutter shaft
- ball bearing
- thrust ball
- shaft
- sleeve
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Abstract
The utility model discloses an axial clearance eliminate mechanism of a trimming disc scissors shaft. The axial clearance eliminate mechanism of the trimming disc scissors shaft comprises the axial clearance eliminate mechanism of an upper cutter shaft and the axial clearance eliminate mechanism of a lower cutter shaft. The axial clearance eliminate mechanism of the upper cutter shaft comprises a cylinder spring I, an engine thrust ball bearing I and a locating sleeve I, wherein the cylinder spring I is placed inside an installation groove I of the locating sleeve I, the cylinder spring I brings elasticity toward the tail end of the upper cutter shaft to bear on the engine thrust ball bearing I, and a stop gear is placed between the engine thrust ball bearing I and the upper cutter shaft. The axial clearance eliminate mechanism of the lower cutter shaft comprises a cylinder spring II, an engine thrust ball bearing II, an inner locating shaft sleeve, a locating sleeve II and an outer locating shaft sleeve. The outer locating shaft sleeve and the inner locating shaft sleeve are respectively used for withstanding an outer ring and an inner ring both of which belong to a double row circular cone roller bearing II, the cylinder spring II is arranged inside an installation groove II of the locating sleeve II, and the cylinder spring II brings the elasticity toward the cutter disc of the lower cutter shaft to bear on the engine thrust ball bearing II. The other end of the engine thrust ball bearing II locates though a shaft shoulder placed on the lower cutter shaft.
Description
Technical field
The utility model relates to a kind of subsidiary body of cut edge circle shear, and concrete is a kind of trimming disk scissors shaft end play eliminating machine.
Background technology
In the production process of sheet metal strip and sheet material, the production stage that the side cut right and wrong are usually seen, each production line all is to adopt the trimming device of disc type to come sheet metal strip and sheet material are cut edge at present.For the trimming device of disc type, the height of trimming quality has very close relationship with the side clearance of every side tool dish, therefore when the sheet metal strip of producing different-thickness or sheet material, eliminate because the trimming disk scissors shaft end play that the consume of the parts such as manufacturing, assembling, bearing and shear history bearing causes, improve degree of regulation and the stability of cutterhead side clearance, significant to the trimming quality that guarantees sheet metal strip and sheet material.
In the existing technology, the degree of regulation of cutterhead side clearance generally adopts the accuracy of manufacture, assembly precision and the installation and maintenance of raising equipment to realize, this method is very high to the requirement of the accuracy of manufacture and assembly precision, thereby cost is also higher; Simultaneously, also need to eliminate the cutter shaft end play that causes owing to reasons such as bearing clearance increase, parts consumes by equipment components such as frequent adjustment and replacing bearings, increased maintenance difficulties and affected production efficiency; In addition, because it is larger to be used for the cut edge circle shear equipment size of slab shearing, make degree of regulation and stability that fit on is difficult to guarantee cut edge circle shear cutterhead side clearance, affected the quality of shearing.
In view of this, the utility model is intended to explore a kind of trimming disk scissors shaft end play eliminating machine, this trimming disk scissors shaft end play eliminating machine not only can be eliminated the cutterhead side clearance of cut edge circle shear, improve degree of regulation and the stability of cutterhead side clearance, and can reduce cost of manufacture, safeguard convenient.
Summary of the invention
The technical problems to be solved in the utility model is to propose a kind of trimming disk scissors shaft end play eliminating machine, this trimming disk scissors shaft end play eliminating machine not only can be eliminated the cutterhead side clearance of cut edge circle shear, improve degree of regulation and the stability of cutterhead side clearance, and can reduce cost of manufacture, safeguard convenient.
Realize above-mentioned technical purpose, trimming disk scissors shaft end play eliminating machine of the present utility model comprises the upper cutter shaft end play eliminating machine that is installed on the cutter shaft and the lower cutter shaft end play eliminating machine that is installed on the lower cutter shaft;
Described upper cutter shaft end play eliminating machine comprises cylindrical spring I, be sleeved on the thrust ball bearing I on the cutter shaft and be axially installed in the interior positioning sleeve I of eccentric bushing, positioning sleeve I withstands the outer ring of biserial circular cone roller bearing I towards an end of upper cutter shaft cutterhead, positioning sleeve I is provided with the mounting groove I that in axial direction extends, cylindrical spring I is installed in the mounting groove I, and it is upper and apply elastic force towards upper cutter shaft afterbody to thrust ball bearing I that the free end of cylindrical spring I withstands on thrust ball bearing I, is provided with the position-limit mechanism that prevents thrust ball bearing I from making progress the cutter shaft afterbody moves between thrust ball bearing I and the upper cutter shaft;
Described lower cutter shaft end play eliminating machine comprises cylindrical spring II, be sleeved on the thrust ball bearing II on the lower cutter shaft, axial restraint is sleeved on the interior positioning shaft sleeve on the lower cutter shaft, and all be axially installed in positioning sleeve II and outside fix axle sleeve in the lower eccentric bushing, outside fix axle sleeve and interior positioning shaft sleeve withstand respectively outer ring and the inner ring of biserial circular cone roller bearing I I, positioning sleeve II is provided with the mounting groove II that in axial direction extends, cylindrical spring II is installed in the mounting groove II, and it is upper and apply elastic force towards lower cutter shaft cutterhead to thrust ball bearing II that the free end of cylindrical spring II withstands on thrust ball bearing II, and the other end of thrust ball bearing II is by being arranged on the shaft shoulder location on the lower cutter shaft.
Further, also be provided with axle sleeve between described thrust ball bearing I and the upper cutter shaft, thrust ball bearing I is sleeved on the axle sleeve, and a make progress side of cutter shaft afterbody of boss face is provided with the baffle ring that extends radially outwardly;
Further, position-limit mechanism comprises the locking nut I that cooperates with the upper slitter male thread, is provided with stop washer I between described locking nut I and the described baffle ring;
Further, also comprise the baffle plate I that is fixedly mounted on the eccentric bushing, described positioning sleeve I withstands on the baffle plate I towards an end of upper cutter shaft afterbody, is provided with between described baffle plate I and the positioning sleeve I to adjust packing ring I;
Further, described mounting groove I is at least two, and uniform being arranged on the positioning sleeve I of annular, and described cylindrical spring I one by one correspondence is installed in the mounting groove I;
Further, also comprise and the locking nut II of lower cutter shaft threaded engagement, be provided with stop washer II between described locking nut II and the interior positioning shaft sleeve;
Further, also comprise the baffle plate II that is fixedly mounted on the lower eccentric bushing, described outside fix axle sleeve withstands on the baffle plate II towards an end of lower cutter shaft afterbody, is provided with between described baffle plate II and the outside fix axle sleeve to adjust packing ring II;
Further, described mounting groove II is at least two, and uniform being arranged on the positioning sleeve II of annular, and described cylindrical spring II one by one correspondence is installed in the mounting groove II.
The beneficial effects of the utility model are:
Trimming disk scissors shaft end play eliminating machine of the present utility model is by arranging upper cutter shaft end play eliminating machine and lower cutter shaft end play eliminating machine:
The cylindrical spring I of upper cutter shaft end play eliminating machine applies elastic force towards upper cutter shaft afterbody to thrust ball bearing I, because the effect of position-limit mechanism, upper cutter shaft is subject to the thrust towards upper cutter shaft afterbody, because upper eccentric bushing is installed on the equipment rack and maintains static, upper cutter shaft occurs with respect to the displacement of upper eccentric bushing towards upper cutter shaft afterbody, because the outer ring of biserial circular cone roller bearing I is fixed by positioning sleeve I, inner ring is fixed on the cutter shaft, therefore, the inner ring of biserial circular cone roller bearing I can be with respect to its outer ring towards producing the upwards displacement of cutter shaft afterbody, this is identical with upper cutter shaft suffered shearing side force in shear history, so, just, eliminated because the upper cutter shaft end play that the device fabrication assembling causes reaches because the end-play that the parts such as bearing use wearing and tearing to cause; In addition, owing to thrust ball bearing I being installed, relatively rotating between upper eccentric bushing and the upper cutter shaft when not affecting the adjusting registration;
The cylindrical spring II of lower cutter shaft end play eliminating machine applies elastic force towards lower cutter shaft cutterhead to thrust ball bearing II, because thrust ball bearing II is by the shaft shoulder location of lower cutter shaft, lower cutter shaft is subject to the thrust towards lower cutter shaft cutterhead, because lower eccentric bushing is fixedly mounted on the equipment rack and maintains static, lower cutter shaft occurs with respect to the displacement of lower eccentric bushing towards lower cutter shaft cutterhead, because outer ring and the inner ring of biserial circular cone roller bearing I I are axially fixed in respectively on lower eccentric bushing and the lower cutter shaft, the inner ring of biserial circular cone roller bearing I I can be with respect to having produced with respect to the displacement of its outer ring towards lower cutter shaft cutterhead, this is identical with lower cutter shaft suffered shearing side force in shear history, so, just, eliminated because the lower cutter shaft end play that the device fabrication assembling causes reaches because the end-play that the parts such as bearing use wearing and tearing to cause; In addition, because thrust ball bearing II being installed, not affecting and regulate at present relatively rotating between eccentric bushing and the lower cutter shaft of registration;
In sum, trimming disk scissors shaft end play eliminating machine of the present utility model can be by the elastic force of cylindrical spring I and cylindrical spring II, automatically eliminate because the axial gap that device fabrication and rigging error cause and because the end-play that parts wear causes, easy to maintenance, degree of regulation and stability are better.
Description of drawings
Fig. 1 is the upper cutter shaft end play eliminating machine example structure schematic diagram of the utility model trimming disk scissors shaft end play eliminating machine;
Fig. 2 is the A detail drawing of Fig. 1;
Fig. 3 is for being the lower cutter shaft end play eliminating machine example structure schematic diagram of the utility model trimming disk scissors shaft end play eliminating machine;
Fig. 4 is the B detail drawing of Fig. 3.
Description of reference numerals:
The upper cutter shaft of 10-; 11-cylindrical spring I; 12-thrust ball bearing I; The upper eccentric bushing of 13-; 14-positioning sleeve I; The upper cutter shaft cutterhead of 15-; 16-biserial circular cone roller bearing I; 17-mounting groove I; The upper cutter shaft afterbody of 18-; 19-baffle plate I; 20-adjusts packing ring I; The 21-axle sleeve; 22-locking nut I; 23-stop washer I;
Cutter shaft under the 30-; 31-cylindrical spring II; Positioning shaft sleeve in the 32-; Eccentric bushing under the 33-; 34-positioning sleeve II; 35-outside fix axle sleeve; 36-biserial circular cone roller bearing I I; 37-mounting groove II; Cutter shaft cutterhead under the 38-; The 39-shaft shoulder; The 40-retaining wall; 41-locking nut II; 42-stop washer II; 43-thrust ball bearing II; 44-baffle plate II; 45-adjusts packing ring II.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present utility model is elaborated.
As shown in Figure 1, be the upper cutter shaft end play eliminating machine example structure schematic diagram of the utility model trimming disk scissors shaft end play eliminating machine; Fig. 2 is the A detail drawing of Fig. 1.Fig. 3 is for being the lower cutter shaft end play eliminating machine example structure schematic diagram of the utility model trimming disk scissors shaft end play eliminating machine; Fig. 4 is the B detail drawing of Fig. 3.
The trimming disk scissors shaft end play eliminating machine of the present embodiment comprises the upper cutter shaft end play eliminating machine that is installed on the cutter shaft 10 and the lower cutter shaft end play eliminating machine that is installed on the lower cutter shaft 30.
Upper cutter shaft end play eliminating machine comprises cylindrical spring I 11, be sleeved on thrust ball bearing I 12 and the positioning sleeve I 14 that is axially installed in the eccentric bushing 13 on the cutter shaft 10, positioning sleeve I 14 withstands the outer ring of biserial circular cone roller bearing I 16 towards an end of upper cutter shaft cutterhead 15, positioning sleeve I 14 is provided with and in axial direction extends mounting groove I 17, cylindrical spring I 11 is installed in the mounting groove I 17, and the free end of cylindrical spring I 17 withstands on the thrust ball bearing I 12 and apply elastic force towards upper cutter shaft afterbody 18 to thrust ball bearing I 12, be provided with between thrust ball bearing I 12 and the upper cutter shaft 10 and prevent the upwards position-limit mechanism that moves of cutter shaft 10 afterbodys 18 of thrust ball bearing I 12, be that biserial circular cone roller bearing I 16 is positioned at positioning sleeve I 14 towards a side of upper cutter shaft cutterhead 15, positioning sleeve I 14 is between thrust ball bearing I 12 and biserial circular cone roller bearing I 16.
Positioning sleeve I 14 can adopt the various structures form to be axially installed in the eccentric bushing 13, be installed with baffle plate I 19 on the upper eccentric bushing 13 of the present embodiment, positioning sleeve I 19 withstands on the baffle plate I 19 towards an end of upper cutter shaft afterbody 18, the other end withstands on the outer ring of biserial circular cone roller bearing I 16, has realized that positioning sleeve I 14 is with respect to upper eccentric bushing axial restraint.Preferably, be provided with between baffle plate I 19 and the positioning sleeve I 14 and adjust packing ring I 20, the installation of being convenient between controllable register I 19 and the positioning sleeve I 14 cooperates.
Preferably, also be provided with axle sleeve 21 between thrust ball bearing I 12 and the upper cutter shaft 10, thrust ball bearing I12 is sleeved on the axle sleeve 21, and axle sleeve 21 a facing up side of cutter shaft afterbody 15 is provided with the baffle ring that extends radially outwardly.Accordingly, position-limit mechanism comprises and the locking nut I 22 of upper cutter shaft 10 threaded engagement, is provided with stop washer I 23 between locking nut I 22 and the baffle ring.Position-limit mechanism also can adopt other multiple conventional structures, adopt the position-limit mechanism of the present embodiment to play and prevent that thrust ball bearing I 12 from relatively moving towards upper cutter shaft 10 afterbodys with respect to upper cutter shaft 10, and also can regulate pretightning force between thrust ball bearing I 12 and the cylindrical spring I 11 by locking nut I 22.
Preferably, mounting groove I 17 is at least two, and uniform being arranged on the positioning sleeve I 14 of annular, and cylindrical spring I 11 one by one correspondence is installed in the mounting groove I 17.The mounting groove I 17 of the present embodiment is set to 6, by a plurality of mounting groove I 17 are set, and at the uniform a plurality of cylindrical spring I 11 of installation of mounting groove I 17 interior annulars, elastic force is evenly distributed.
Adopt the cylindrical spring I 11 of the upper cutter shaft end play eliminating machine of the present embodiment to apply elastic force towards upper cutter shaft afterbody 18 to thrust ball bearing I12, because the effect of position-limit mechanism, upper cutter shaft 10 is subject to the thrust towards upper cutter shaft afterbody 18, because upper eccentric bushing 13 is installed on the equipment rack and maintains static, upper cutter shaft 10 occurs with respect to the displacement of upper eccentric bushing 13 towards upper cutter shaft afterbody 18, because the outer ring of biserial circular cone roller bearing I 16 is fixing by positioning sleeve I 14, inner ring is fixed on the cutter shaft 10, therefore, the inner ring of biserial circular cone roller bearing I 16 can be with respect to its outer ring towards producing the upwards displacement of cutter shaft afterbody 18, this is identical with upper cutter shaft 10 suffered shearing side force in shear history, so, just, eliminated because the upper cutter shaft end play that the device fabrication assembling causes and because the end-play that the parts such as bearing use wearing and tearing to cause.In addition, owing to thrust ball bearing I 12 being installed, relatively rotating between upper eccentric bushing 13 and the upper cutter shaft 10 when not affecting the adjusting registration.
Interior positioning shaft sleeve 32 can adopt various structures to be axially installed on the lower cutter shaft 30, the lower cutter shaft 30 of the present embodiment is provided with the locking nut II 41 with its threaded engagement, be provided with stop washer II 42 between locking nut II 41 and the interior positioning shaft sleeve 32, the other end of interior positioning shaft sleeve 32 withstands on the inner ring of biserial circular cone roller bearing I I 36, and interior positioning shaft sleeve 32 is realized with respect to lower cutter shaft 30 axial restraints.By being set, locking nut II 41 also can regulate pretightning force between thrust ball bearing II 43 and the cylindrical spring I 31.
Preferably, be installed with baffle plate II 44 on the lower eccentric bushing 33, outside fix axle sleeve 35 withstands on the baffle plate II 44 towards an end of lower cutter shaft afterbody 39, be provided with between baffle plate II 44 and the outside fix axle sleeve 35 and adjust packing ring II 45, realization is axially installed in lower eccentric bushing 33 on the lower eccentric bushing 33, adjust packing ring II 45 by arranging, the installation of being convenient between controllable register I 19 and the positioning sleeve I 14 cooperates.
Preferably, mounting groove II 37 is at least two, and uniform being arranged on the positioning sleeve II 34 of annular, and cylindrical spring II 31 one by one correspondence is installed in the mounting groove II 37.The mounting groove II 37 of the present embodiment is set to 6, by a plurality of mounting groove II 37 are set, and at the uniform a plurality of cylindrical spring II 31 of installation of mounting groove II 37 interior annulars, elastic force is evenly distributed.
The cylindrical spring II 31 of lower cutter shaft end play eliminating machine applies elastic force towards lower cutter shaft cutterhead 38 to thrust ball bearing II 43, because thrust ball bearing II 43 is by the shaft shoulder 39 location of lower cutter shaft 30, lower cutter shaft 30 is subject to the thrust towards lower cutter shaft cutterhead 38, because lower eccentric bushing 33 is fixedly mounted on the equipment rack and maintains static, lower cutter shaft 30 occurs with respect to the displacement of lower eccentric bushing 33 towards lower cutter shaft cutterhead 38, because outer ring and the inner ring of biserial circular cone roller bearing I I 36 are axially fixed in respectively on lower eccentric bushing 33 and the lower cutter shaft 30, the inner ring of biserial circular cone roller bearing I I 36 can be with respect to the displacement of its outer ring generation towards lower cutter shaft cutterhead 38, this is identical with lower cutter shaft 30 suffered shearing side force in shear history, so, just, eliminated because the lower cutter shaft end play that the device fabrication assembling causes and because the end-play that the parts such as bearing use wearing and tearing to cause.In addition, because thrust ball bearing II 43 being installed, not affecting and regulate at present relatively rotating between eccentric bushing 33 and the lower cutter shaft 30 of registration.
Axial restraint as herein described represents can not relatively move in the axial direction between two parts.
Explanation is at last, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (8)
1. a trimming disk scissors shaft end play eliminating machine is characterized in that: comprise the upper cutter shaft end play eliminating machine that is installed on the cutter shaft and the lower cutter shaft end play eliminating machine that is installed on the lower cutter shaft;
Described upper cutter shaft end play eliminating machine comprises cylindrical spring I, be sleeved on the thrust ball bearing I on the cutter shaft and be axially installed in the interior positioning sleeve I of eccentric bushing, positioning sleeve I withstands the outer ring of biserial circular cone roller bearing I towards an end of upper cutter shaft cutterhead, positioning sleeve I is provided with the mounting groove I that in axial direction extends, cylindrical spring I is installed in the mounting groove I, and it is upper and apply elastic force towards upper cutter shaft afterbody to thrust ball bearing I that the free end of cylindrical spring I withstands on thrust ball bearing I, is provided with the position-limit mechanism that prevents thrust ball bearing I from making progress the cutter shaft afterbody moves between thrust ball bearing I and the upper cutter shaft;
Described lower cutter shaft end play eliminating machine comprises cylindrical spring II, be sleeved on the thrust ball bearing II on the lower cutter shaft, axial restraint is sleeved on the interior positioning shaft sleeve on the lower cutter shaft, and all be axially installed in positioning sleeve II and outside fix axle sleeve in the lower eccentric bushing, outside fix axle sleeve and interior positioning shaft sleeve withstand respectively outer ring and the inner ring of biserial circular cone roller bearing I I, positioning sleeve II is provided with the mounting groove II that in axial direction extends, cylindrical spring II is installed in the mounting groove II, and it is upper and apply elastic force towards lower cutter shaft cutterhead to thrust ball bearing II that the free end of cylindrical spring II withstands on thrust ball bearing II, and the other end of thrust ball bearing II is by being arranged on the shaft shoulder location on the lower cutter shaft.
2. trimming disk scissors shaft end play eliminating machine according to claim 1, it is characterized in that: also be provided with axle sleeve between described thrust ball bearing I and the upper cutter shaft, thrust ball bearing I is sleeved on the axle sleeve, and a make progress side of cutter shaft afterbody of boss face is provided with the baffle ring that extends radially outwardly.
3. trimming disk scissors shaft end play eliminating machine according to claim 2, it is characterized in that: position-limit mechanism comprises the locking nut I that cooperates with the upper slitter male thread, is provided with stop washer I between described locking nut I and the described baffle ring.
4. trimming disk scissors shaft end play eliminating machine according to claim 1, it is characterized in that: also comprise the baffle plate I that is fixedly mounted on the eccentric bushing, described positioning sleeve I withstands on the baffle plate I towards an end of upper cutter shaft afterbody, is provided with between described baffle plate I and the positioning sleeve I to adjust packing ring I.
5. each described trimming disk scissors shaft end play eliminating machine according to claim 1-4, it is characterized in that: described mounting groove I is at least two, and uniform being arranged on the positioning sleeve I of annular, described cylindrical spring I one by one correspondence is installed in the mounting groove I.
6. trimming disk scissors shaft end play eliminating machine according to claim 1 is characterized in that: also comprise and the locking nut II of lower cutter shaft threaded engagement, be provided with stop washer II between described locking nut II and the interior positioning shaft sleeve.
7. trimming disk scissors shaft end play eliminating machine according to claim 1, it is characterized in that: also comprise the baffle plate II that is fixedly mounted on the lower eccentric bushing, described outside fix axle sleeve withstands on the baffle plate II towards an end of lower cutter shaft afterbody, is provided with between described baffle plate II and the outside fix axle sleeve to adjust packing ring II.
8. according to claim 1 or 6 or 7 described trimming disk scissors shaft end play eliminating machines, it is characterized in that: described mounting groove II is at least two, and uniform being arranged on the positioning sleeve II of annular, described cylindrical spring II one by one correspondence is installed in the mounting groove II.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220269209 CN202639486U (en) | 2012-06-08 | 2012-06-08 | Axial clearance eliminate mechanism of trimming disc scissors shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220269209 CN202639486U (en) | 2012-06-08 | 2012-06-08 | Axial clearance eliminate mechanism of trimming disc scissors shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202639486U true CN202639486U (en) | 2013-01-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220269209 Expired - Fee Related CN202639486U (en) | 2012-06-08 | 2012-06-08 | Axial clearance eliminate mechanism of trimming disc scissors shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202639486U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111924592A (en) * | 2020-06-04 | 2020-11-13 | 张朝设 | Rolling system of polymer coiled material |
| CN113814465A (en) * | 2020-06-19 | 2021-12-21 | 力山工业股份有限公司 | Sawing device |
-
2012
- 2012-06-08 CN CN 201220269209 patent/CN202639486U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111924592A (en) * | 2020-06-04 | 2020-11-13 | 张朝设 | Rolling system of polymer coiled material |
| CN111924592B (en) * | 2020-06-04 | 2022-06-21 | 张朝设 | Rolling system of polymer coiled material |
| CN113814465A (en) * | 2020-06-19 | 2021-12-21 | 力山工业股份有限公司 | Sawing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20200608 |