CN107297448B - Rocker arm type multi-station grinding and expanding machine - Google Patents
Rocker arm type multi-station grinding and expanding machine Download PDFInfo
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- CN107297448B CN107297448B CN201710537540.7A CN201710537540A CN107297448B CN 107297448 B CN107297448 B CN 107297448B CN 201710537540 A CN201710537540 A CN 201710537540A CN 107297448 B CN107297448 B CN 107297448B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The utility model provides a rocking arm formula multistation grinds and expands machine, includes the frame, is equipped with the grinding roller axle that can rotate in the frame, and the epaxial fixedly connected with grinding roller of grinding roller still is equipped with two at least grinding rollers that are used for the set annular workpiece in the frame, and the axis and the grinding roller axle parallel arrangement of grinding roller, just the grinding roller can be close to or keep away from the grinding roller through the swing, and every grinding roller correspondence is provided with two auxiliary wheels that are used for supplementary grinding roller to support annular workpiece. The invention has compact structure, can realize the technical purpose of saving energy, can improve the processing precision of parts and has high production efficiency.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a rocker arm type multi-station grinding and expanding machine.
Background
The basic working principle of the rolling mill requires that the distance between the roller for applying pressure and the roller for sleeving the annular part can be changed, so that the gap between the roller and the roller is changed, and the annular part is stressed to be deformed.
The change of wheelbase between the two is realized with the supporting linear guide who uses of running-roller or grinding roller to current book machine that expands, and linear guide's manufacturing and maintenance are comparatively complicated, and the book machine that expands of this kind of structure does not enlarge the effect to drive power (also be the pressure of processing that makes the part produce the deformation simultaneously), therefore drive arrangement need provide great drive power to lead to drive arrangement and whole roll to expand the organism volume generally great. In addition, the milling and expanding machine in the prior art only processes 1 part in each processing cycle, so that the processing efficiency is low, the auxiliary operation time of the machine tool is long, and the energy waste is caused.
Disclosure of Invention
In order to solve the technical problems, the invention provides a rocker arm type multi-station grinding and expanding machine which is compact in structure, high in production efficiency and capable of saving energy.
The technical scheme adopted by the invention to solve the technical problems is as follows: the utility model provides a rocking arm formula multistation grinds and expands machine, includes the frame, is equipped with the grinding roller axle that can rotate in the frame, and the epaxial fixedly connected with grinding roller of grinding roller still is equipped with two at least grinding rollers that are used for the set annular workpiece in the frame, and the axis and the grinding roller axle parallel arrangement of grinding roller, just the grinding roller can be close to or keep away from the grinding roller through the swing, and every grinding roller correspondence is provided with two auxiliary wheels that are used for supplementary grinding roller to support annular workpiece.
Furthermore, a roller rocker shaft is arranged on the rack in parallel with the roller shaft, a roller rocker arm is arranged on the roller rocker shaft, the roller rocker arm can rotate around the axis of the roller rocker shaft under the drive of a roller rocker arm driving device, and the roller is arranged on the roller rocker arm.
Furthermore, the roller rocker arm comprises two triangular plates which are parallel, symmetrical and connected with each other, and three groups of corresponding vertexes of the two triangular plates are respectively and correspondingly connected with the roller rocker shaft, the roller rocker arm driving device and the roller.
Furthermore, roller one end pass through the bearing support in the mounting hole of one of them triangle-shaped board's corresponding summit department, a slider is connected to the other end, the slider can be along establishing the guide rail axial slip in another triangle-shaped board corresponding summit department to the dismouting for the bearing end is realized to the drive roller.
Furthermore, the roller rocker driving device is any one of an air cylinder, a hydraulic cylinder or an electric push rod, a shell end of the roller rocker driving device is hinged with the rack, and a power output end of the roller rocker driving device is hinged with the roller rocker.
Furthermore, the number of the grinding rollers is two, and the two grinding rollers are symmetrically arranged relative to the grinding wheel.
Furthermore, the rack is provided with a strip-shaped base, the middle part of the base is provided with a stand column, one end of the grinding wheel shaft, which is provided with a grinding wheel, is obliquely arranged on the stand column upwards, and the grinding roller rocker shaft is arranged on the base through a shaft support.
Furthermore, the auxiliary wheels are connected with respective auxiliary wheel rocker shafts through respective auxiliary wheel rocker arms, the axes of the auxiliary wheels are arranged in parallel with the axis of the grinding wheel shaft, the auxiliary wheel rocker shafts can be rotatably arranged on the rack, the auxiliary wheel rocker shaft of each grinding roller is arranged near the position where the other grinding roller is arranged, and each auxiliary wheel rocker shaft is connected with a respective auxiliary wheel driving device.
Has the advantages that:
according to the invention, the grinding roller can approach or depart from the grinding wheel in a swinging mode to change the gap between the grinding roller and the grinding wheel, so that the annular part can be machined, and according to the lever principle, the amplification of the driving force of the grinding roller and the improvement of the positioning precision of the grinding roller can be realized as long as the power arm is larger than the resistance arm, so that the technical purpose of saving energy sources can be realized, the machining precision of the part can be improved, and the structure is more compact.
Furthermore, because the roller is replaced by a rotary motion pair (a rotary motion pair is formed between the rocker shaft and the rocker) relative to the roller, the linear motion pair in the prior art is adopted, sliding friction is converted into rolling friction, the roller is easier to process and manufacture, and is not easy to break down, and compared with the prior art, the roller can greatly improve the production efficiency.
In addition, the invention can process a plurality of products with the same type or different types at the same time because the same rolling wheel is provided with a plurality of rolling rollers which can be independently driven, thereby further improving the production efficiency and reducing the energy consumption.
The design of the rocker arm structure is ingenious, the structural stability can be guaranteed, the requirement of weight reduction of equipment is met, materials are saved, and the use reliability of the rocker arm structure can be guaranteed.
The present invention will be described in further detail with reference to the drawings and the detailed description.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure, 1, a frame, 1-1, a base, 1-2, a column, 1-3, a stabilizing block, 2, a left roller rocker arm driving device rotating shaft, 3, a left roller rocker arm driving device, 4, an upper left auxiliary wheel, 5, a roller shaft driving device, 6, an upper right auxiliary wheel rocker arm shaft, 7, an upper right auxiliary wheel rocker arm, 8, an upper left auxiliary wheel rocker arm, 9, an upper right auxiliary wheel, 10, a right roller rocker arm driving device rotating shaft, 11, a right roller rocker arm driving device, 12, an upper left auxiliary wheel rocker arm shaft, 13, a right roller, 14, a right roller rocker arm driving device connecting shaft, 15, a right roller rocker arm, 16, a right lower auxiliary wheel, 17, a right lower auxiliary wheel rocker arm, 18, a right roller rocker arm shaft, 19, a left lower auxiliary wheel rocker arm shaft, 20, a roller shaft, 21, a roller, 22, a left lower auxiliary wheel rocker arm, 23, a shaft support, 24, a left roller rocker arm shaft, 25, a right lower auxiliary wheel rocker arm shaft, 26, a left roller rocker arm, 27, a slider, 28, a left roller rocker arm driving device connecting shaft, 29, a left lower auxiliary wheel, 30 and a left roller.
Detailed Description
As shown in the figure, the rocker arm type multi-station grinding and expanding machine comprises a machine frame 1, wherein the machine frame 1 is provided with a strip-shaped base 1-1, and the middle part of one side of the base 1-1 in the width direction is provided with an upright post 1-2.
A roller shaft 20 is arranged on the upright post 1-2 along the width direction of the base 1-1, one end of the roller shaft 20 is rotatably arranged on the upright post 1-2 through a bearing, and the end of the roller shaft 20 is in transmission connection with a roller shaft driving device 5; a roller 21 is fixedly disposed at the other end of the roller shaft 20, i.e. the end of the roller shaft 20 facing the base, in this embodiment, the end of the roller shaft 20 where the roller 21 is disposed is inclined upward.
A left grinding roller rocker arm shaft 24 and a right grinding roller rocker arm shaft 18 are symmetrically arranged on the base 1-1 below the grinding wheel 21 in parallel with the grinding wheel shaft 20, and both the rocker arm shafts are arranged on the base 1-1 through respective shaft supports 23.
Left and right roller rocker arms 26 and 15 are rotatably provided on the left and right roller rocker shafts 24 and 18, respectively.
The left roller rocker 26 comprises two triangular plates which are parallel, symmetrical and connected with each other, and three groups of corresponding vertexes of the two triangular plates are respectively and correspondingly connected with the left roller rocker shaft 24, the left roller rocker driving device 3 and the left roller 30.
One end of the left grinding roller 30 is supported in a mounting hole at the corresponding vertex of one of the triangular plates through a bearing, the other end of the left grinding roller is connected with a slide block 27, and the slide block 27 can axially slide along a guide rail (the guide rail is not shown in the figure) arranged at the corresponding vertex of the other triangular plate so as to drive the left grinding roller 30 to realize the dismounting and mounting of the left grinding roller relative to the bearing end, so that a workpiece can be taken and placed.
Specifically, the other end of the left grinding roller 30 is rotatably provided in the slider 27 and is axially positioned by a bolt connected thereto. The slider 27 can drive the left grinding roll 30 to be removed from or installed in the bearing end while sliding on the guide rail.
The slide 27 can be driven by its own drive mechanism to slide along the guide rails when required.
In practical application, the following steps can be also included: one end of the left grinding roller 30 is supported at the corresponding vertex of one of the triangular plates through a bearing, and the other end is suspended.
The left roller rocker arm driving device 3 can be any one of an air cylinder, a hydraulic cylinder or an electric push rod. The shell end of the left roller rocker arm driving device 3 is hinged with the upright post 1-2 through the rotating shaft 2 of the left roller rocker arm driving device, and the power output end is hinged with the left roller rocker arm 13 through the connecting shaft 28 of the left roller rocker arm driving device.
In the present embodiment, the left roller rocker arm driving device connecting shaft 28 is arranged on the left roller rocker arm 26, the axis of the left roller rocker arm is parallel to the axis of the roller shaft 20, and the left roller rocker arm driving device connecting shaft can rotate around the axis of the left roller rocker arm; the left rocker arm driving device rotating shaft 2 is also arranged in parallel with the axis of the roller shaft 20, and the left roller rocker arm driving device 3 can rotate around the axis of the left roller rocker arm driving device rotating shaft 2.
In order to ensure the amplification of the driving force of the left grinding roller rocker arm driving device 3 on the left grinding roller 30 and the improvement of the positioning accuracy of the left grinding roller 30, when the plane determined by the axis of the left grinding roller rocker arm driving device connecting shaft 28 and the axis of the left grinding roller rocker arm shaft 24 is in the horizontal position, the distance from the plane determined by the axis of the left grinding roller rocker arm driving device connecting shaft 28 and the axis of the left rocker arm driving device rotating shaft 2 to the axis of the left grinding roller rocker arm shaft 24 is greater than the distance from the axis of the left grinding roller rocker arm shaft 24 to the plane determined by the axis of the left grinding roller 30 and the axis of the grinding wheel shaft 20.
The right roller rocker arm 15 and the left roller rocker arm 26 adopt the same structure, and the mounting structure of the right roller 13 is the same as that of the left roller 30; the mounting structure of the right roller rocker arm driving device 11 is the same as that of the left roller rocker arm driving device 3, and is not described herein again.
For each grinding roller, two auxiliary wheels for assisting the grinding roller to support the annular workpiece are correspondingly arranged.
In the present embodiment, the two auxiliary wheels of the left roller 30 are the upper left auxiliary wheel 4 and the lower left auxiliary wheel 29, and the two auxiliary wheels of the right roller 13 are the upper right auxiliary wheel 9 and the lower right auxiliary wheel 16.
The upper left auxiliary wheel 4 is arranged at one end of an upper left auxiliary wheel rocker arm 8, the other end of the upper left auxiliary wheel rocker arm 8 is arranged on an upper left auxiliary wheel rocker shaft 12, and the upper left auxiliary wheel rocker shaft 12 is arranged on the upright post 1-2 and is positioned near a right grinding roller 13.
The lower left auxiliary wheel 29 and the upper left auxiliary wheel 4 are disposed vertically symmetrically. Lower left auxiliary wheel 29
Is arranged at one end of a left lower auxiliary wheel rocker arm 22, the other end of the left lower auxiliary wheel rocker arm 22 is arranged on a left lower auxiliary wheel rocker arm shaft 19, and a left lower auxiliary wheel rocker arm 12 is arranged on the base 1-1 and is positioned near the right grinding roller 13. The left lower auxiliary wheel rocker shaft 19 can be independently arranged, or can share one shaft with the right roller rocker shaft 18, and specifically, the left lower auxiliary wheel rocker shaft 12 can be fixedly connected with the right roller rocker shaft 18, so that the right roller rocker shaft 18 is sleeved with the right roller rocker arm 15 in an empty way.
Upper right auxiliary wheel 9 and upper left auxiliary wheel 4 set up for the 21 bilateral symmetry of running roller, and concrete setting mode is similar with upper left auxiliary wheel 4, and no longer gives unnecessary details, only when setting up, can all set up upper left auxiliary wheel rocking arm 8 and upper right auxiliary wheel rocking arm 7 into the platelike, and stagger the setting around just, can guarantee two auxiliary wheels simultaneous workings and can not mutual interference, can set up the projecting shaft with the installation auxiliary wheel according to the distance from corresponding running roller at the auxiliary wheel installation end of corresponding rocking arm.
The arrangement of the lower right auxiliary wheel 16 is the same as that of the lower left auxiliary wheel 29, and the description thereof is omitted. Each auxiliary wheel rocker shaft is connected with a respective auxiliary wheel driving device.
In the frame of the embodiment, as the main parts are arranged on one side of the upright post 1-2, in order to increase stability, the other side of the upright post is provided with the stabilizing block 1-3 which plays a role in balancing and stabilizing.
In practical application, the frame 1 is used as a frame foundation of the main body of the rolling and expanding machine, the structural form of the frame can be designed according to requirements, for example, the frame can also be a base with a larger bottom area, and the upright column is arranged in the middle of the base to ensure the stability of the base; the frame can be a split combined structure or an integrally welded or cast structure.
In this embodiment, the one end of the roller shaft provided with the roller is inclined upwards and arranged on the upright column, so that the roller can be conveniently installed and positioned. In practical applications, the roller axle 20 may be disposed perpendicular to the horizontal plane, or may be disposed parallel to the horizontal plane.
The structure of the grinding wheel 21 is made according to the structure of the part to be machined, for example, grooves or protrusions may be provided on the outer peripheral surface thereof to form protrusions and grooves on the surface of the workpiece correspondingly. The number of the grooves or the bulges can be one or more, and the shapes can be the same or different.
The left grinding roller and the right grinding roller are cylinders capable of rotating around the axes of the left grinding roller and the right grinding roller, grooves or protrusions for forming the inner circumferential surface of the part to be processed can be arranged on the outer circumferential surface of the parts to be processed, the number of the grooves or the protrusions can be one, or multiple, and the grooves or the protrusions can be the same or different in shape.
The number of the rollers (i.e., the number of the processing stations) is set according to production needs, and is not limited to two in the present embodiment. In this embodiment, the roller rocker shaft is disposed on the base, and may be disposed at a suitable position according to the disposition direction of the roller shaft in practical applications.
The working process of the invention (taking the left station as an example) is as follows:
the grinding wheel 21 keeps rotating along with the grinding wheel shaft 20 under the driving of the grinding wheel shaft driving device;
when the machining is started, the left grinding roller 30 is located at a position far away from the grinding wheel 21, the annular workpiece blank is sleeved on the left grinding roller 30, and the left upper auxiliary wheel 4 and the left lower auxiliary wheel 29 are located at positions close to or in contact with each other;
in the processing process, the left roller rocker 26 swings under the driving of the left roller rocker driving device 3 to drive the left roller 30 to gradually approach the roller 21, in the process, the annular workpiece blank sleeved on the left roller 30 is firstly contacted with the upper left auxiliary wheel 4 and the lower left auxiliary wheel 29, each auxiliary wheel applies proper pressure to the annular workpiece blank to ensure that the annular workpiece blank cannot randomly move on the left roller 30, in the process, the rightmost side of the inner wall of the annular workpiece blank abuts against the left roller 30, and the upper left auxiliary wheel 4 and the lower left auxiliary wheel 29 play a certain role in blocking the movement of the left roller 30; as the left roller 30 continues to move towards the roller 21, the upper left auxiliary wheel 4 and the lower left auxiliary wheel 29 gradually separate from each other while remaining in contact with the annular workpiece blank; when the contact point of the annular workpiece blank and the two auxiliary wheels crosses the central connecting line of the two auxiliary wheels, the two auxiliary wheels approach each other again, in the process, the leftmost side of the inner wall of the annular workpiece blank is abutted against the left grinding roller 30, the two auxiliary wheels exert pressure on the annular workpiece blank so as to play a certain role in pushing the left grinding roller 30 until the annular workpiece blank contacts the grinding wheel 21, and the grinding wheel 21 drives the annular workpiece blank to rotate around the left grinding roller 30; the annular workpiece blank drives the left grinding roller 30 to rotate, and the left grinding roller 30 is continuously close to the grinding wheel 21 and presses the annular workpiece blank to reduce the section and increase the diameter of the annular workpiece blank; each auxiliary wheel is always kept in contact with the annular workpiece blank, and when the diameter of the annular workpiece blank is increased, the upper left auxiliary wheel 4 and the lower left auxiliary wheel 29 are also separated from each other; when the diameter of the annular workpiece blank reaches a preset value, the left grinding roller 30 moves reversely, the upper left auxiliary wheel 4 and the lower left auxiliary wheel 29 are also separated from the annular workpiece under the action of respective driving devices, and the machining process is finished.
The upper left auxiliary wheel 4 and the lower left auxiliary wheel 29 not only play a role in radial positioning in the machining process, but also can prevent the blank of the annular workpiece from generating unnecessary deformation, and improve the machining precision of the workpiece.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention. It is within the scope of the present invention to provide a person skilled in the art with the benefit of the present disclosure with several modifications and improvements without departing from the scope of the present invention.
Claims (5)
1. The utility model provides a rocking arm formula multistation grinds and expands machine, includes frame (1), is equipped with can pivoted running roller axle (20) on frame (1), fixedly connected with running roller (21), its characterized in that on running roller axle (20): the frame (1) is also provided with at least two grinding rollers for sleeving the annular workpiece, the central axes of the grinding rollers are arranged in parallel with a grinding wheel shaft (20), the grinding rollers can be close to or far away from a grinding wheel (21) through swinging, and each grinding roller is correspondingly provided with two auxiliary wheels for assisting the grinding rollers to support the annular workpiece; a roller rocker shaft is arranged on the frame (1) in parallel with the roller shaft, a roller rocker arm is arranged on the roller rocker shaft, the roller rocker arm is driven by a roller rocker arm driving device to rotate around the axis of the roller rocker shaft, and the roller is arranged on the roller rocker arm; the roller rocker comprises two triangular plates which are symmetrical in parallel and connected with each other, and three groups of corresponding vertexes of the two triangular plates are respectively and correspondingly connected with a roller rocker shaft, a roller rocker driving device and a roller; the roller be two, two roller are the relative grinding wheel symmetry setting of roller.
2. The swing-arm multi-station milling and expanding machine according to claim 1, wherein: roller one end pass through the bearing and support in the mounting hole of the corresponding summit department of one of them triangle-shaped board, a slider is connected to the other end, the slider can be along establishing the guide rail axial slip of the corresponding summit department of another triangle-shaped board to drive the roller and realize the dismouting for the bearing end.
3. The swing-arm multi-station milling and expanding machine according to claim 1, wherein: the roller rocker driving device is any one of an air cylinder, a hydraulic cylinder or an electric push rod, the shell end of the roller rocker driving device is hinged with the frame, and the power output end of the roller rocker driving device is hinged with the roller rocker.
4. The swing arm type multi-station grinding and expanding machine as claimed in claim 1, wherein: the rolling mill is characterized in that the rack (1) is provided with a strip-shaped base (1-1), the middle of the base (1-1) is provided with a stand column (1-2), one end of the rolling mill shaft, which is provided with a rolling wheel (21), is obliquely arranged on the stand column (1-2) upwards, and the rolling mill rocker shaft is arranged on the base (1-1) through a shaft support (23).
5. The swing-arm multi-station milling and expanding machine according to claim 4, wherein: the auxiliary wheels are connected with respective auxiliary wheel rocker shafts through respective auxiliary wheel rocker arms, the axes of the auxiliary wheels are arranged in parallel with the axis of the grinding wheel shaft, the auxiliary wheel rocker shafts can be rotatably arranged on the rack, the auxiliary wheel rocker shaft of each grinding roller is arranged near the position of the other grinding roller, and each auxiliary wheel rocker shaft is connected with a respective auxiliary wheel driving device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710537540.7A CN107297448B (en) | 2017-07-04 | 2017-07-04 | Rocker arm type multi-station grinding and expanding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710537540.7A CN107297448B (en) | 2017-07-04 | 2017-07-04 | Rocker arm type multi-station grinding and expanding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107297448A CN107297448A (en) | 2017-10-27 |
| CN107297448B true CN107297448B (en) | 2023-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710537540.7A Active CN107297448B (en) | 2017-07-04 | 2017-07-04 | Rocker arm type multi-station grinding and expanding machine |
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| Country | Link |
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| CN (1) | CN107297448B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB877579A (en) * | 1958-03-12 | 1961-09-13 | Norman Coupe Ashton | Improvements in or relating to ring rolling mills |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001121416A (en) * | 1999-10-27 | 2001-05-08 | Minebea Co Ltd | Method of finishing land of outer race of bearing, and bearing |
| JP2003230927A (en) * | 2002-02-14 | 2003-08-19 | Sanyo Special Steel Co Ltd | Rough shape material for bearing ring reduced in quenching strain and its manufacturing method |
| CN201214132Y (en) * | 2008-05-29 | 2009-04-01 | 山西安伦锻压机床有限公司 | Flange ring rolling mill with distance measurer |
| CN102672084A (en) * | 2012-05-24 | 2012-09-19 | 苏州中浦冷辗科技有限公司 | Cold rolling machine tool |
| CN203109132U (en) * | 2012-12-28 | 2013-08-07 | 山东平安数控机械有限公司 | Numerical-control vertical ring rolling machine |
| CN203044764U (en) * | 2013-01-16 | 2013-07-10 | 济南泉跃数控机械有限公司 | Vertical type numerical control radial ring rolling machine |
| CN105562568B (en) * | 2015-12-16 | 2017-08-25 | 青岛衡均锻压机械有限公司 | A kind of vertical stone roller expansion machine and stone roller expanding method |
| CN205436944U (en) * | 2015-12-18 | 2016-08-10 | 湖州以创精工机械有限公司 | Ring rolls |
| CN206083571U (en) * | 2016-09-23 | 2017-04-12 | 洛阳先驱自动化设备有限公司 | High accuracy reamer |
| CN207086809U (en) * | 2017-07-04 | 2018-03-13 | 洛阳先驱自动化设备有限公司 | A kind of rocker-arm multistation grinds expansion machine |
-
2017
- 2017-07-04 CN CN201710537540.7A patent/CN107297448B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB877579A (en) * | 1958-03-12 | 1961-09-13 | Norman Coupe Ashton | Improvements in or relating to ring rolling mills |
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| CN107297448A (en) | 2017-10-27 |
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