CN110479900B - Gear-relieved movable cutter head mechanism and gear-relieved equipment - Google Patents
Gear-relieved movable cutter head mechanism and gear-relieved equipment Download PDFInfo
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- CN110479900B CN110479900B CN201910784745.4A CN201910784745A CN110479900B CN 110479900 B CN110479900 B CN 110479900B CN 201910784745 A CN201910784745 A CN 201910784745A CN 110479900 B CN110479900 B CN 110479900B
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- Prior art keywords
- cutter head
- gear
- movable cutter
- main body
- relieved
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- 230000007246 mechanism Effects 0.000 title claims abstract description 28
- 230000009467 reduction Effects 0.000 claims description 12
- 238000007790 scraping Methods 0.000 abstract description 8
- 239000000758 substrate Substances 0.000 abstract description 8
- 239000000463 material Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000010862 gear shaping Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000036346 tooth eruption Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
- B21D53/022—Making the fins
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
The application discloses a movable cutter head mechanism of gear relieved and gear relieved equipment. The gear-relieved movable cutter head mechanism comprises a movable cutter head structural main body, a half gear, a rotary structural main body, a cutter plate, a sector upper tile cover, a sector lower tile cover and a gear driving assembly; the half gear is connected with the movable cutter head structural main body; an upper chute and a lower chute are respectively arranged on the upper surface and the lower surface of the rotating structure main body; the front part of the rotating structure main body is provided with a knife board fixing position, and the shovel knife board is fixed in the knife board fixing position; the back of the rotating structure main body is provided with a cylindrical surface rack; the gear driving assembly is fixedly connected with the movable cutter head structural body and meshed with the cylindrical surface rack to drive the rotary structural body to rotate. The relieved tooth equipment comprises the relieved tooth movable cutter head mechanism. The angle of cutting into the substrate by the scraper knife plate can be changed, and the scraper knife plate can be used for stably scraping the substrate.
Description
Technical Field
The application relates to the technical field of cutting teeth, in particular to a movable cutter head mechanism for cutting teeth and cutting tooth equipment.
Background
The heat radiation fitting is used for heat exchange, and has application in heat exchange equipment such as air conditioners and refrigerators. In order to improve the heat exchange efficiency, it is necessary to machine a heat radiation fitting having fins on both sides. The processing of the heat dissipation fitting is completed by a relieved tooth device. An important part of the tooth apparatus is the movable cutter head mechanism. During the working process of the relieved tooth equipment, the movable cutter head mechanism can be contacted with the surface of the strip-shaped material serving as the base material, so that the fins are relieved on the surface of the base material.
The foregoing background is only for the purpose of facilitating an understanding of the inventive concepts and technical aspects of the present application and is not necessarily prior art to the present application, but is not intended to be used to evaluate the novelty and creativity of the present application in the event that no clear evidence indicates that such is already disclosed at the filing date of the present application.
Disclosure of Invention
The application provides a movable cutter head mechanism of forming relieved teeth and forming relieved teeth equipment, can change the angle that the cutting shovel board cut into the substrate.
In a first aspect, the present application provides a relieved tooth movable cutter head mechanism comprising a movable cutter head structural body, a half gear, a rotary structural body, a relieving blade, a sector upper tile cover, a sector lower tile cover and a gear driving assembly;
the half gear is connected with the movable cutter head structural main body so as to drive the movable cutter head structural main body to rotate;
an upper chute and a lower chute are respectively arranged on the upper surface and the lower surface of the rotating structure main body;
the front part of the rotating structure main body is provided with a cutter plate fixing position, the shovel cutter plate is fixed in the cutter plate fixing position, and the cutter point of the shovel cutter plate is basically overlapped with the rotating shaft of the rotating structure main body;
the back of the rotating structure main body is provided with a cylindrical rack, and the central axis of the cylindrical rack is basically coincident with the rotating shaft of the rotating structure main body;
one part of the upper tile cover of the sector is arranged in the upper chute, and the other part of the upper tile cover of the sector is fixedly connected with the movable cutter head structure main body; one part of the fan lower tile cover is arranged in the lower chute, and the other part of the fan lower tile cover is fixedly connected with the movable cutter head structure main body; so that the rotating structure body can rotate along the direction defined by the upper tile cover of the sector and the lower tile cover of the sector;
the gear driving assembly is fixedly connected with the movable cutter head structural body and meshed with the cylindrical surface rack to drive the rotary structural body to rotate.
In some preferred embodiments, the gear drive assembly includes a motor, a reduction gearbox, a master gear, and a slave gear; the motor is connected with the main gear through the reduction gearbox; the master gear is meshed with the slave gear; the slave gear is meshed with the cylindrical rack.
In some preferred embodiments, the motor, the reduction gearbox and the main gear are all located inside the movable cutter head structural body; at least a part of the slave gear is exposed outside the movable cutter head structural body and meshed with the cylindrical rack.
In some preferred embodiments, a blade press block is also included; the shovel blade is fixed on the rotating structure main body through the blade pressing block.
In some preferred embodiments, the gear drive assembly is located within the movable cutter head structure body and exposes a portion thereof for engagement with the cylindrical rack.
In some preferred embodiments, the movable cutter head structural body is provided with a fan-shaped protrusion; the other part of the sector upper tile cover is fixedly connected with the upper part of the sector protruding part; the other part of the fan lower tile cover is fixedly connected with the lower part of the fan-shaped protruding part.
In some preferred embodiments, the blade plate is plate-shaped.
In a second aspect, the present application provides a tooth apparatus comprising the tooth movable cutter head mechanism described above.
In some preferred embodiments, the number of tooth movable cutter head mechanisms is two; the two relieved tooth movable cutter head mechanisms are symmetrically arranged.
In some preferred embodiments, the tooth apparatus is a double sided tooth apparatus.
Compared with the prior art, the beneficial effects of this application are:
and the gear driving assembly is fixedly connected with the movable cutter head structural body and outputs rotary power to the cylindrical rack at the back of the rotary structural body. The upper sliding groove and the lower sliding groove on the upper surface and the lower surface of the rotating structure main body are respectively matched with the upper sector tile cover and the lower sector tile cover which are fixed on the movable cutter head structure main body, namely the upper sector tile cover and the lower sector tile cover are sliding rails used as the rotating structure main body. Thus, the rotary structure main body rotates relative to the movable tool bit structure main body. In addition, the shovel blade is fixed in the blade fixing position of the rotating structure main body, and the tool tip of the shovel blade is overlapped with the rotating shaft of the rotating structure main body. Thus, the rotating structure body rotates around the tool tip of the shovel blade, so that the angle of the shovel blade cutting into the base material is changed. The semi-gear is driven to drive the movable cutter head structural main body to rotate around the fixed shaft, so that the scraper knife plate scrapes the base material. In the process of scraping, the tool nose of the scraper blade plate, namely the rotating shaft of the rotating structure main body is stressed, so that the load born by the tool nose of the scraper blade plate in the scraping process can be dispersed along the rotating structure main body, the upper tile cover of the fan, the lower tile cover of the fan and the movable tool bit structure main body, the scraper blade plate can stably scrape the base material, and the service life of the scraper blade plate can be prolonged.
Drawings
FIG. 1 is a schematic view of a structure of a movable cutter head mechanism for a relieved tooth according to an embodiment of the present application;
FIG. 2 schematically illustrates the structure of a rotating structural body and gear drive assembly of an embodiment of the present application;
FIG. 3 schematically illustrates the structure of a movable cutter head structural body according to an embodiment of the present application
FIG. 4 schematically illustrates a portion of the structure of a tooth movable cutter head mechanism of an embodiment of the present application;
fig. 5 is a schematic structural view of a double-sided rack according to an embodiment of the present application.
Detailed Description
In order to make the technical problems, technical solutions and beneficial effects to be solved by the embodiments of the present application more clear, the present application is further described in detail below with reference to fig. 1 to 5 and the embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate describing embodiments of the present application and simplify the description, and do not indicate or imply that the devices or elements 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 application.
The embodiment provides a gear shaping equipment, specifically is two-sided gear shaping equipment, can cut the fin respectively at two sides of rectangular shape substrate and can realize continuous gear shaping to with the substrate processing into the heat dissipation accessory that both sides have the fin.
The double-sided tooth apparatus of this embodiment includes two symmetrically arranged tooth movable cutter mechanisms 100, one tooth movable cutter mechanism for scraping one side surface of the base material, and the other tooth movable cutter mechanism for scraping the other side surface of the base material.
Referring to fig. 1 and 2, the tooth movable cutter mechanism 100 of the present embodiment includes a movable cutter structure body 1, a half gear 2, a rotary structure body 3, a cutter blade plate 4, a sector upper shoe cover 5, a sector lower shoe cover 6, and a gear drive assembly 7.
The half gear 2 is connected with the movable cutter head structural body 1 to drive the movable cutter head structural body 1 to rotate. In this embodiment, the half gear 2 is approximately fan-shaped, and can rotate around the same axis with the movable cutter head structural body 1; the half gear 2 swings the movable bit structure body 1.
In the present exemplary embodiment, the cross section of the rotary body 3 is fan-shaped or approximately fan-shaped. Referring to fig. 2, upper and lower sliding grooves 31 and 32 are provided at upper and lower surfaces of the rotating structure body 3, respectively. Specifically, the upper chute 31 and the lower chute 32 are arc-shaped, have the same rotation axis and coincide or substantially coincide with the rotation axis of the rotating structure body 3.
Referring to fig. 1, the front portion 3A of the rotary structure body 3 is provided with a blade fixing position 33. The blade plate 4 is fixed in the blade plate fixing position 33, and the cutting edge 40 of the blade plate 4 coincides or substantially coincides with the rotation axis of the rotating structure body 3. That is, the rotary structure body 3 rotates around the cutting edge 40 of the blade plate 4.
The blade plate 4 is used for scraping the base material to scoop out the fins on the surface of the base material. Referring to fig. 2, in the present embodiment, the blade plate 4 is plate-shaped and fixed to the rotary structure body 3 by the blade press block 8; specifically, referring to fig. 2, a pressing block fixing position 34 is provided on the rotary structure body 3; the pressing block fixing position 34 is communicated with the knife board fixing position 33; the cutter plate pressing block 8 is long and blocky, and the longitudinal section of the cutter plate pressing block 8 is trapezoidal, so that the cutter plate pressing block 8 can be placed in the pressing block fixing position 34 to press the shovel cutter plate 4.
Referring to fig. 2, the back 3B of the rotating structure body 3 is provided with a cylindrical rack 35. In this embodiment, the cylindrical rack 35 refers to a cylindrical surface with teeth distributed on the surface; the cylindrical surface is a portion of a cylindrical surface. The central axis of the cylindrical rack 35 is substantially coincident with the axis of rotation of the rotating structure body 3, i.e. the cylindrical rack 35 also rotates about the axis of rotation of the rotating structure body 3.
The fan upper tile cap 5 and the fan lower tile cap 6 have the same rotation axis and the rotation axis is also coincident with the rotation axis of the rotating structure body 3. A part of the fan upper tile cap 5 is placed in the upper chute 31 and can move relative to the rotating structure body 3. The other part of the fan upper tile cover 5 is fixedly connected with the movable cutter head structural body 1, so that the fan upper tile cover 5 can move along with the movable cutter head structural body 1. A part of the fan lower tile cap 6 is placed in the lower chute 32 and can move relative to the rotating structure body 3. The other part of the fan lower tile cover 6 is fixedly connected with the movable cutter head structural body 1, so that the fan lower tile cover 6 can also move along with the movable cutter head structural body 1. Since the upper chute 31 and the lower chute 32 are provided on the rotating structure body 3, the rotating structure body 3 can be rotated in the direction defined by the fan upper tile cap 5 and the fan lower tile cap 6.
In this embodiment, the fan upper tile cap 5 and the fan lower tile cap 6 are specifically fixedly connected to the movable cutter head structural body 1 in such a way that: referring to fig. 3, the movable cutter head structural body 1 is provided with a fan-shaped protrusion 11; the other part of the sector upper tile cap 5 is fixedly connected with the upper part 11A of the sector protruding part 11; the other part of the sector lower tile cap 6 is fixedly connected with the lower part 11B of the sector protrusion 11. The gear drive assembly 7 is a power source and drives other components through gears. The gear driving component 7 is fixedly connected with the movable cutter head structural body 1 and meshed with the cylindrical surface rack 35 to drive the rotary structural body 3 to rotate.
Referring to fig. 1 and 5, the double-sided rack 200 of the double-sided tooth-relieved device performs a linear reciprocating motion, and the first section 200A provided with teeth of the double-sided rack 200 drives the half gear 2 of the tooth movable bit mechanism 100 to reciprocate, thereby realizing a tooth relieving action.
As can be seen from the above, the gear drive assembly 7 fixedly connected to the movable cutter head structural body 1 outputs the rotational power to the cylindrical rack 35 of the back portion 3B of the rotary structural body 3. The upper chute 31 and the lower chute 32 on the upper and lower sides of the rotary structure body 3 are respectively matched with the upper sector tile cap 5 and the lower sector tile cap 6 fixed on the movable cutter head structure body 1, that is, the upper sector tile cap 5 and the lower sector tile cap 6 are used as sliding rails of the rotary structure body 3. Thus, the rotary structure body 3 rotates relative to the movable tool bit structure body 1. In addition, the blade plate 4 is fixed in the blade plate fixing position 33 of the rotating structure body 3, and the cutter tip 40 of the blade plate 4 coincides with the rotating shaft of the rotating structure body 3. In this way, the rotating structure body 3 rotates around the cutting edge 40 of the blade 4, thereby changing the angle at which the blade 4 cuts into the substrate. The half gear 2 is driven to drive the movable cutter head structural main body 1 to rotate around a fixed shaft, so that the shovel blade plate 4 shovel the base material. The included angle between the scraper knife plate 4 and the surface of the base material is large, and the thicker the scraped fin is; the smaller the angle between the blade plate 4 and the surface of the substrate, the longer the fins are scraped. Referring to fig. 4, in the process of scraping, the blade tip 40 of the blade 4, that is, the rotating shaft of the rotating structure body 3 is stressed, so that the load borne by the blade tip 40 of the blade 4 in the process of scraping can be dispersed along the rotating structure body 3, the upper tile cap 5, the lower tile cap 6 and the movable blade structure body 1, the blade 4 can stably scrape the substrate, and the service life of the blade 4 can be prolonged.
Referring to fig. 1 and 4, the fan upper tile cap 5 and the fan lower tile cap 6 are similar in shape to tiles. The fan upper tile cap 5 includes an upper annular protrusion 51 and an upper tile cap fixing portion 52, the upper annular protrusion 51 protruding from the upper tile cap fixing portion 52. The sector lower tile cap 6 includes a lower annular projection 61 and a lower tile cap fixing portion 62, the lower annular projection 61 protruding from the lower tile cap fixing portion 62. In the present embodiment, a part of the fan upper tile cap 5 placed in the upper chute 31 is specifically an upper annular protrusion 51; the portion of the fan lower tile cap 6 that is disposed in the lower chute 32 is specifically the lower annular projection 61. The upper annular projection 51 and the lower annular projection 61 have the same axis of rotation and this axis of rotation coincides or substantially coincides with the axis of rotation of the rotating structure body 3. The upper annular projection 51 and the lower annular projection 61 are slide rails as the rotating structure body 3. In this embodiment, the other part of the fan upper tile cap 5 is an upper tile cap fixing part 52, which is fixedly connected with the movable cutter head structure main body 1; the other part of the fan lower tile cap 6 is a lower tile cap fixing part 62 which is fixedly connected with the movable cutter head structure main body 1.
In the present embodiment, referring to fig. 2, the gear drive assembly 7 includes a motor 71, a reduction gearbox 72, a master gear 73, and a slave gear 74. The motor 71 is a servo motor. The reduction gearbox 72 is a gear box for reducing speed. The motor 71 is connected with a main gear 73 through a reduction gearbox 72; specifically, the output shaft of the reduction gearbox 72 is coaxially connected to the main gear 73. The master gear 73 is meshed with the slave gear 74. The slave gear 74 is engaged with the cylindrical rack 35. In this way, the motor 71 drives the main gear 73 to rotate under the cooperation of the reduction gearbox 72, and drives the rotating structure main body 3 and the main gear 73 to rotate in the same direction through the driven gear 74, so that the blade plate 4 rotates around the blade tip 40 or the blade line as an axis, and the angle of the blade plate 4 cutting into the product is changed. In this embodiment, the gear drive assembly 7 achieves unidirectional self-locking, allowing the slave gear 74 to remain stationary when subjected to the force exerted by the cylindrical rack 35.
In this embodiment, referring to fig. 3, the gear drive assembly 7 is located inside the movable cutter head structural body 1 and exposes a portion thereof to engage with the cylindrical rack 35. The specific steps can be as follows: the motor 71, the reduction gearbox 72 and the main gear 73 are all positioned in the movable cutter head structural body 1 and fixed in the movable cutter head structural body 1; at least a portion of the slave gear 74 is exposed to the outside of the movable cutter head structure body 1 to engage with the cylindrical rack 35. In this way, not only the space can be fully utilized, but also the force born by the gear driving assembly 7 in the process of tooth cutting can be transmitted to the movable cutter head structural main body 1.
The foregoing is a further detailed description of the present application in connection with specific/preferred embodiments, and it is not intended that the practice of the present application be limited to such descriptions. It will be apparent to those skilled in the art to which the present application pertains that several alternatives or modifications can be made to these described embodiments without departing from the spirit of the invention, and that these alternatives or modifications should be considered to be within the scope of the present application.
Claims (8)
1. The utility model provides a gear cutting movable tool bit mechanism which characterized in that: the rotary cutter comprises a movable cutter head structure main body, a half gear, a rotary structure main body, a scraper knife plate, an upper sector tile cover, a lower sector tile cover and a gear driving assembly;
the half gear is connected with the movable cutter head structural main body so as to drive the movable cutter head structural main body to rotate;
an upper chute and a lower chute are respectively arranged on the upper surface and the lower surface of the rotating structure main body;
the front part of the rotating structure main body is provided with a cutter plate fixing position, the shovel cutter plate is fixed in the cutter plate fixing position, and the cutter point of the shovel cutter plate is basically overlapped with the rotating shaft of the rotating structure main body;
the back of the rotating structure main body is provided with a cylindrical rack, and the central axis of the cylindrical rack is basically coincident with the rotating shaft of the rotating structure main body;
one part of the upper tile cover of the sector is arranged in the upper chute, and the other part of the upper tile cover of the sector is fixedly connected with the movable cutter head structure main body; one part of the fan lower tile cover is arranged in the lower chute, and the other part of the fan lower tile cover is fixedly connected with the movable cutter head structure main body; so that the rotating structure body can rotate along the direction defined by the upper tile cover of the sector and the lower tile cover of the sector;
the gear driving assembly is fixedly connected with the movable cutter head structural main body and meshed with the cylindrical surface rack to drive the rotary structural main body to rotate;
the gear driving assembly comprises a motor, a reduction gearbox, a main gear and a slave gear; the motor is connected with the main gear through the reduction gearbox; the master gear is meshed with the slave gear; the slave gear is meshed with the cylindrical rack;
the gear driving assembly is positioned in the movable cutter head structural body, and a part of the gear driving assembly is exposed and meshed with the cylindrical surface rack.
2. The movable cutter head mechanism for the relieved tooth according to claim 1, wherein: the motor, the reduction gearbox and the main gear are all positioned in the movable cutter head structure main body; at least a part of the slave gear is exposed outside the movable cutter head structural body and meshed with the cylindrical rack.
3. The movable cutter head mechanism for the relieved tooth according to claim 1, wherein: the cutter plate pressing block is also included; the shovel blade is fixed on the rotating structure main body through the blade pressing block.
4. The movable cutter head mechanism for the relieved tooth according to claim 1, wherein: the movable cutter head structure main body is provided with a fan-shaped protruding part; the other part of the sector upper tile cover is fixedly connected with the upper part of the sector protruding part; the other part of the fan lower tile cover is fixedly connected with the lower part of the fan-shaped protruding part.
5. The movable cutter head mechanism for the relieved tooth according to claim 1, wherein: the scraper knife plate is plate-shaped.
6. A tooth apparatus, characterized in that: comprising a tooth movable cutter head mechanism according to any one of claims 1 to 5.
7. Tooth apparatus according to claim 6, characterized in that: the number of the relieved tooth movable cutter head mechanisms is two; the two relieved tooth movable cutter head mechanisms are symmetrically arranged.
8. Tooth apparatus according to claim 6, characterized in that: the relieved tooth equipment is double-sided relieved tooth equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910784745.4A CN110479900B (en) | 2019-08-23 | 2019-08-23 | Gear-relieved movable cutter head mechanism and gear-relieved equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910784745.4A CN110479900B (en) | 2019-08-23 | 2019-08-23 | Gear-relieved movable cutter head mechanism and gear-relieved equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110479900A CN110479900A (en) | 2019-11-22 |
| CN110479900B true CN110479900B (en) | 2024-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910784745.4A Active CN110479900B (en) | 2019-08-23 | 2019-08-23 | Gear-relieved movable cutter head mechanism and gear-relieved equipment |
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| CN (1) | CN110479900B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039199A (en) * | 1988-07-11 | 1990-01-31 | 张佩勤 | Milling cutter for variable-pitch band saw blade and manufacture method thereof |
| DE4237052A1 (en) * | 1992-11-03 | 1994-05-05 | Mtu Muenchen Gmbh | Appts. for repair welding of the tips of guide vanes and runner blades of turbomachines - incorporating notched jaws with an adjustable gap |
| CN107999893A (en) * | 2017-12-26 | 2018-05-08 | 深圳山源电器股份有限公司 | A kind of two-sided backing-off cutting machine and backing-off cutting method |
| CN109807401A (en) * | 2019-02-22 | 2019-05-28 | 深圳山源电器股份有限公司 | Two-sided continuous teeth device and method |
-
2019
- 2019-08-23 CN CN201910784745.4A patent/CN110479900B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039199A (en) * | 1988-07-11 | 1990-01-31 | 张佩勤 | Milling cutter for variable-pitch band saw blade and manufacture method thereof |
| DE4237052A1 (en) * | 1992-11-03 | 1994-05-05 | Mtu Muenchen Gmbh | Appts. for repair welding of the tips of guide vanes and runner blades of turbomachines - incorporating notched jaws with an adjustable gap |
| CN107999893A (en) * | 2017-12-26 | 2018-05-08 | 深圳山源电器股份有限公司 | A kind of two-sided backing-off cutting machine and backing-off cutting method |
| CN109807401A (en) * | 2019-02-22 | 2019-05-28 | 深圳山源电器股份有限公司 | Two-sided continuous teeth device and method |
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| Publication number | Publication date |
|---|---|
| CN110479900A (en) | 2019-11-22 |
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