CN111604768A - Universal rotation sander and adjusting method thereof - Google Patents
Universal rotation sander and adjusting method thereof Download PDFInfo
- Publication number
- CN111604768A CN111604768A CN202010437246.0A CN202010437246A CN111604768A CN 111604768 A CN111604768 A CN 111604768A CN 202010437246 A CN202010437246 A CN 202010437246A CN 111604768 A CN111604768 A CN 111604768A
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- China
- Prior art keywords
- sleeve
- adjusting
- rotating arm
- fixed
- arm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
- B24B19/22—Single-purpose machines or devices for particular grinding operations not covered by any other main group characterised by a special design with respect to properties of the material of non-metallic articles to be ground
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/02—Frames; Beds; Carriages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/02—Drives or gearings; Equipment therefor for performing a reciprocating movement of carriages or work- tables
- B24B47/06—Drives or gearings; Equipment therefor for performing a reciprocating movement of carriages or work- tables by liquid or gas pressure only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
- B24B47/12—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by mechanical gearing or electric power
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/22—Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
A universal rotary sander comprises a rack, wherein the rack is used for fixing the lower end of a vertical column in the vertical direction, a stop head is fixed at the upper end of the vertical column, an upper adjusting sleeve and a lower adjusting sleeve which can slide up and down along the vertical column are sleeved outside the vertical column, and the upper adjusting sleeve and the lower adjusting sleeve can slide up and down by depending on adjusting power equipment; the upper and lower adjusting sleeves are hinged with the first hinge piece, and a first pin shaft between the upper and lower adjusting sleeves is vertically arranged; one end of a first rotating arm is fixedly connected to the upper and lower adjusting sleeves, the other end of the first rotating arm is hinged to a second hinge piece, and a second pin shaft between the first rotating arm and the second rotating arm is vertically arranged; one end of the second rotating arm is fixedly connected to the first rotating arm, and the other end of the second rotating arm is hinged to the third hinge piece. The invention also discloses an adjusting method using the universal rotary sander. Compared with the prior art, the brick grinding machine has the technical effects that three hinges are designed, the position of the knife grinder is convenient to adjust, and bricks for an industrial kiln can be freely ground.
Description
Technical Field
The invention relates to brick production equipment for an industrial kiln, in particular to a universal rotary grinding machine.
Background
At present, when bricks for industrial kilns are produced, the bricks for the industrial kilns need to be polished, and at present, the bricks are polished manually.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: manual sanding is inefficient.
The technical scheme of the invention is as follows:
a universal rotary sander comprises a rack, wherein the rack is used for fixing the lower end of a vertical column in the vertical direction, a stop head is fixed at the upper end of the vertical column, an upper adjusting sleeve and a lower adjusting sleeve which can slide up and down along the vertical column are sleeved outside the vertical column, and the upper adjusting sleeve and the lower adjusting sleeve can slide up and down by depending on adjusting power equipment; the upper and lower adjusting sleeves are hinged with the first hinge piece, and a first pin shaft between the upper and lower adjusting sleeves is vertically arranged; one end of a first rotating arm is fixedly connected to the upper and lower adjusting sleeves, the other end of the first rotating arm is hinged to a second hinge piece, and a second pin shaft between the first rotating arm and the second rotating arm is vertically arranged; one end of a second rotating arm is fixedly connected to the first rotating arm, the other end of the second rotating arm is hinged to a third hinge piece, and a third pin shaft between the first rotating arm and the third rotating arm is arranged vertically; the one end of linking firmly the operation arm on the third hinge spare, the other end of operation arm is equipped with grinding device, grinding device includes the operation sleeve, the telescopic outer wall of operation links firmly the tip at the operation arm, wear to establish the support sleeve in the operation sleeve, the vertical setting of support sleeve, the shell of the fixed grinding motor in support sleeve's top, grinding motor's grinding motor output shaft is vertical downwards, and with the upper end coaxial fixation of the axle of polishing, the lower extreme of the axle of polishing is fixed whets a knife, the axle of polishing is connected on the support sleeve inner wall through two at least bearings.
The supporting sleeve is fixedly connected with the operation sleeve, and the relative position between the knife sharpening device and the operation arm is fixed when the sharpening operation is carried out.
The supporting sleeve is slidably connected with the operating sleeve, specifically, a sleeve ring is sleeved outside the supporting sleeve, a gap is formed between the sleeve ring and the supporting sleeve, two adjusting pin shafts are arranged in the radial direction of the supporting sleeve, the two adjusting pin shafts are arranged on one diameter of the supporting sleeve, the diameter is perpendicular to the direction of an operating arm, the operating arm fixes an oil cylinder seat in the axial direction of the operating arm, the oil cylinder seat is hinged with the cylinder body end of an oil cylinder, the piston end of the oil cylinder is hinged with a left adjusting rod, the left adjusting rod fixes the sleeve ring, the operating arm fixes a first connecting block, the first connecting block is hinged with a second connecting block, the second connecting block is hinged with one end of a third connecting block, the other end of the third connecting block is hinged with one end of a right adjusting rod, the other end of the right adjusting rod is fixedly connected with the fixed sleeve ring, the left adjusting rod and the right adjusting rod are distributed on two, The third connecting block is in one plane. Therefore, the vertical distance between the supporting sleeve and the operation sleeve can be adjusted through the extension and retraction of the piston end of the oil cylinder, and the relative position between the knife grinder and the operation arm is also adjusted. This adjustment can accommodate adjustments to the thickness of the workpiece being sanded.
The adjusting power equipment for adjusting the up-and-down motion of the up-and-down adjusting sleeve comprises an adjusting motor, the adjusting motor is fixed on a blocking head, an output shaft of the adjusting motor is connected with the upper end of a lead screw, the lead screw is parallel to an upright post and is arranged in a sleeve in a penetrating mode, the sleeve is fixed on the blocking head, the lead screw is in external thread fit with two nuts, and the two nuts are fixed on the up-and-down adjusting sleeve.
The output shaft of the adjusting motor is connected with the lead screw through a bevel gear meshed with two wheels.
The left adjusting rod is fixed with a handle.
An adjusting method using the universal rotary sander comprises the steps that firstly, an adjusting motor is started, and a nut drives an upper adjusting sleeve, a lower adjusting sleeve and an operation arm to integrally lift through the autorotation of a lead screw, so that the vertical position of a knife grinder is matched with a workpiece;
then, the handles are pushed and pulled back and forth and swung left and right to enable the vertical column to rotate relatively between the outer part of the upright column and the upper and lower adjusting sleeves, between the first rotating arm and the second rotating arm and between the second rotating arm and the operation arm, so that the knife is in a proper horizontal position, then the polishing motor is turned on to drive the knife to rotate, and the operation is carried out, wherein in the operation, the horizontal position of the knife can also be continuously adjusted through the handles; in the operation, if the vertical position of the knife grinder needs to be finely adjusted, the vertical position of the knife grinder is adjusted by the extension and contraction of the piston end of the oil cylinder.
Compared with the prior art, the brick grinding machine has the technical effects that three hinges are designed, the position of the knife grinder is convenient to adjust, and bricks for an industrial kiln can be freely ground.
Drawings
FIG. 1 is a schematic of the present invention.
Fig. 2 is an enlarged schematic view of the polishing apparatus.
FIG. 3 is a top view of the present invention in use.
FIG. 4 is a schematic top view of the present invention in use (II).
FIG. 5 is a schematic top view (III) of the present invention in use.
Detailed Description
As figure 1, a universal rotation dull polish machine, including frame 10, frame 10 is used for fixing this patent in the operation district, and the lower extreme of the stand 11 of the fixed vertical direction of frame 10, the fixed dog 12 of upper end of stand 11, stand 11 overcoat are established and are followed its gliding upper and lower adjusting sleeve 20 from top to bottom, and upper and lower adjusting sleeve 20 can rely on adjusting power equipment to slide from top to bottom.
The up-down adjusting sleeve 20 is hinged to the first hinge 21, and a first pin 22 is vertically disposed between the two.
One end of the first rotating arm 30 is fixedly connected to the upper and lower adjusting sleeve 20, the other end of the first rotating arm 30 is hinged to the second hinge member 31, and a second pin 32 is vertically arranged between the first rotating arm and the second rotating arm.
One end of the second rotating arm 40 is fixedly connected to the first rotating arm 30, the other end of the second rotating arm 40 is hinged to the third hinge 41, and a third pin 42 between the first rotating arm and the third rotating arm is vertically arranged.
As shown in fig. 1-2, the third hinge 41 is fixedly connected with one end of the working arm 50, the other end of the working arm 50 is provided with a polishing device, the polishing device comprises a working sleeve 51, the outer wall of the working sleeve 51 is fixedly connected with the end of the working arm 50, a supporting sleeve 86 is arranged in the working sleeve 51 in a penetrating manner, the supporting sleeve 86 is vertically arranged, the top of the supporting sleeve 86 is fixed with a shell of a polishing motor 81, a polishing motor output shaft 82 of the polishing motor 81 is vertically downward and coaxially fixed with the upper end of a polishing shaft 84, a knife 80 is fixed at the lower end of the polishing shaft 84, and the polishing shaft 84 is connected to the inner wall of the supporting sleeve 86 through at least two bearings 83.
The connection between the support sleeve 86 and the working sleeve 51 is of two types, one is a fixed connection and the other is a movable connection.
First, the support sleeve 86 is fixedly connected to the working sleeve 51, and the relative position of the blade 80 and the working arm 50 is fixed during the grinding operation.
Secondly, the supporting sleeve 86 is slidably connected with the operating sleeve 51, specifically, referring to fig. 2, a sleeve ring 64 is sleeved outside the supporting sleeve 86, a gap 65 is formed between the sleeve ring 64 and the supporting sleeve 86, two adjusting pin shafts 66 are arranged in the radial direction of the supporting sleeve 86, the two adjusting pin shafts 66 are arranged on one diameter of the supporting sleeve 86, the diameter is perpendicular to the direction of the operating arm 50, the operating arm 50 is fixed with the cylinder seat 60 in the axial direction thereof, the cylinder seat 60 is hinged with the cylinder end of the cylinder 61, the piston end 62 of the cylinder 61 is hinged with the left adjusting rod 63, the left adjusting rod 63 is fixed with the sleeve ring 64, the operating arm 50 is fixed with the first connecting block 71, the first connecting block 71 is hinged with the second connecting block 72, the second connecting block 72 is hinged with one end of the third connecting block 73, the other end of the third connecting block 73 is hinged with one end of the right adjusting rod 73, the other end of the right adjusting, The right adjusting rod 73 is distributed on two sides of the lantern ring 64, and the left adjusting rod 63, the right adjusting rod 73, the oil cylinder 61, the first connecting block 71, the second connecting block 72 and the third connecting block 73 are in the same plane. In this way, by extending and retracting the piston end 62 of the cylinder 61, the vertical distance between the support sleeve 86 and the working sleeve 51 can be adjusted, and the relative position between the sharpener 80 and the working arm 50 is adjusted. This adjustment can accommodate adjustments to the thickness of the workpiece being sanded.
Referring to fig. 1, the adjusting power device for adjusting the vertical movement of the vertical adjusting sleeve 20 comprises an adjusting motor 13, the adjusting motor 13 is fixed on the stopper 12, an adjusting motor output shaft 14 of the adjusting motor 13 is connected with the upper end of a lead screw 16, the lead screw 16 is parallel to the upright post 11 and is arranged in a sleeve 15 in a penetrating manner, the sleeve 15 is fixed on the stopper 12, the lead screw 16 is in external thread fit with two nuts 17, and the two nuts 17 are fixed on the adjusting vertical adjusting sleeve 20.
For ease of transmission, the adjustment motor output shaft 14 is connected to the lead screw 16 by means of two bevel gears in wheel engagement.
For ease of adjustment, the left adjustment lever 63 secures the handle 85.
The working principle is as follows:
when the tool sharpener is used, the adjusting motor 13 is started, and the nut 17 drives the upper and lower adjusting sleeves 20 and the working arm 50 to integrally lift through the rotation of the lead screw 16, so that the vertical position of the sharpener 80 is adapted to a workpiece on the processing table 90.
Referring to fig. 1-5, the worker pushes and pulls the handle 85 forward and backward, and swings the handle left and right to make the exterior of the upright post 11 and the vertical adjustment sleeve 20 (the first rotating arm 30), the first rotating arm 30 and the second rotating arm 40, and the second rotating arm 40 and the working arm 50 rotate relatively, so that the knife 80 is at a proper horizontal position, and then the grinding motor 81 is turned on to drive the knife 80 to rotate for working, and in the working, the horizontal position of the knife 80 can be continuously adjusted through the handle 85.
In operation, if the vertical position of the knife 80 needs to be finely adjusted, the vertical position is adjusted by extending and contracting the piston end 62 of the oil cylinder 61.
See the prior art for additional details.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the overall concept of the present invention, and these should also be considered as the protection scope of the present invention.
Claims (7)
1. The utility model provides an universal rotation dull polish machine, includes frame (10), the lower extreme of stand (11) of the fixed vertical direction of frame (10), fixed dog (12) in upper end of stand (11), its characterized in that: an up-down adjusting sleeve (20) capable of sliding up and down along the upright column (11) is sleeved outside the upright column, and the up-down adjusting sleeve (20) can slide up and down by depending on adjusting power equipment;
the upper and lower adjusting sleeve (20) is hinged with a first hinge piece (21), and a first pin shaft (22) between the upper and lower adjusting sleeve and the first hinge piece is vertically arranged;
one end of a first rotating arm (30) is fixedly connected to the upper and lower adjusting sleeve (20), the other end of the first rotating arm (30) is hinged to a second hinge element (31), and a second pin shaft (32) between the first rotating arm and the second rotating arm is vertically arranged;
one end of a second rotating arm (40) is fixedly connected to the first rotating arm (30), the other end of the second rotating arm (40) is hinged to a third hinge piece (41), and a third pin shaft (42) between the first rotating arm and the third rotating arm is vertically arranged;
link firmly the one end of operation arm (50) on third hinge spare (41), the other end of operation arm (50) is equipped with grinding device, grinding device includes operation sleeve (51), the outer wall of operation sleeve (51) links firmly the tip at operation arm (50), wear to establish support sleeve (86) in operation sleeve (51), the vertical setting of support sleeve (86), the shell of the fixed grinding motor (81) in top of support sleeve (86), grinding motor output shaft (82) of grinding motor (81) are vertical downwards, and with the upper end coaxial fixed of grinding axle (84), the fixed (80) of whetting a knife of lower extreme of grinding axle (84), grinding axle (84) are connected on support sleeve (86) inner wall through two at least bearings (83).
2. The universal rotary sander of claim 1, wherein: the supporting sleeve (86) is fixedly connected with the operation sleeve (51), and the relative position between the knife grinder (80) and the operation arm (50) is fixed when the grinding operation is carried out.
3. The universal rotary sander of claim 1, wherein: the supporting sleeve (86) is in sliding connection with the operating sleeve (51), specifically, a sleeve ring (64) is sleeved outside the supporting sleeve (86), a gap (65) is formed between the sleeve ring (64) and the supporting sleeve (86), two adjusting pin shafts (66) are arranged in the radial direction of the supporting sleeve (86), the two adjusting pin shafts (66) are arranged on one diameter of the supporting sleeve (86), the diameter is perpendicular to the direction of an operating arm (50), the operating arm (50) fixes an oil cylinder seat (60) in the axial direction, the oil cylinder seat (60) is hinged with the cylinder body end of an oil cylinder (61), the piston end (62) of the oil cylinder (61) is hinged with a left adjusting rod (63), the sleeve ring (64) is fixed by the left adjusting rod (63), the first connecting block (71) is fixed by the operating arm (50), the second connecting block (72) is hinged with the first connecting block (71), and the second connecting block (72) is hinged with one end of a third connecting block (73), the other end of the third connecting block (73) is hinged to one end of the right adjusting rod (73), the other end of the right adjusting rod (73) is fixedly connected to the fixed lantern ring (64), the left adjusting rod (63) and the right adjusting rod (73) are distributed on two sides of the lantern ring (64), and the left adjusting rod (63), the right adjusting rod (73), the oil cylinder (61), the first connecting block (71), the second connecting block (72) and the third connecting block (73) are arranged on the same plane.
4. The universal rotary sander of claim 3, wherein: adjusting sleeve (20) up-and-down motion's regulation power equipment includes adjusting motor (13), adjusting motor (13) are fixed on gear (12), adjusting motor output shaft (14) of adjusting motor (13) are connected with the upper end of lead screw (16), lead screw (16) are parallel with stand (11), and it wears to establish in sleeve pipe (15), sleeve pipe (15) are fixed on gear (12), two nuts (17) of lead screw (16) external screw thread fit, these two nuts (17) are fixed on adjusting sleeve (20) from top to bottom.
5. The universal rotary sander of claim 4, wherein: an output shaft (14) of the adjusting motor is connected with a lead screw (16) through a bevel gear meshed with two wheels.
6. The universal rotary sander of claim 5, wherein: the left adjusting rod (63) is fixed with a handle (85).
7. An adjustment method using the universal rotary sander as set forth in claim 6, characterized in that:
firstly, starting an adjusting motor (13), and driving an upper and lower adjusting sleeve (20) and an operation arm (50) to integrally lift by a nut (17) through the rotation of a lead screw (16), so that the vertical position of a knife grinder (80) is adapted to a workpiece;
then, the handle (85) is pushed and pulled back and forth and swung left and right to enable the vertical column (11) to rotate relatively between the outer part of the vertical column (11) and the up-and-down adjusting sleeve (20), between the first rotating arm (30) and the second rotating arm (40) and between the second rotating arm (40) and the operation arm (50), so that the knife (80) is in a proper horizontal position, then the grinding motor (81) is turned on to drive the knife (80) to rotate for operation, and in the operation, the horizontal position of the knife (80) can be continuously adjusted through the handle (85);
in operation, if the vertical position of the knife grinder (80) needs to be finely adjusted, the vertical position is adjusted through the extension and contraction of the piston end (62) of the oil cylinder (61).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010437246.0A CN111604768A (en) | 2020-05-21 | 2020-05-21 | Universal rotation sander and adjusting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010437246.0A CN111604768A (en) | 2020-05-21 | 2020-05-21 | Universal rotation sander and adjusting method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111604768A true CN111604768A (en) | 2020-09-01 |
Family
ID=72195842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010437246.0A Pending CN111604768A (en) | 2020-05-21 | 2020-05-21 | Universal rotation sander and adjusting method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111604768A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114619323A (en) * | 2020-12-11 | 2022-06-14 | 宜宾市创世纪机械有限公司 | A kind of tool |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2135427Y (en) * | 1992-09-22 | 1993-06-09 | 河南省黄河磨具厂 | Rocker-arm type polishing machine for diamond material |
| CN204700702U (en) * | 2014-12-26 | 2015-10-14 | 环球石材（东莞）股份有限公司 | A kind of shaped stone material modeling and adding construction equipment |
| CN109108804A (en) * | 2018-11-09 | 2019-01-01 | 嵊州市天骏电器有限公司 | A kind of burnishing device for the production of range hood master control panel |
| CN109434629A (en) * | 2019-01-24 | 2019-03-08 | 烟台工程职业技术学院(烟台市技师学院) | Burnishing machine is used in a kind of processing of mechanized equipment |
| CN209350056U (en) * | 2018-12-24 | 2019-09-06 | 肇庆美凌环保机械科技有限公司 | A kind of grinder is combined the unit with head holder |
-
2020
- 2020-05-21 CN CN202010437246.0A patent/CN111604768A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2135427Y (en) * | 1992-09-22 | 1993-06-09 | 河南省黄河磨具厂 | Rocker-arm type polishing machine for diamond material |
| CN204700702U (en) * | 2014-12-26 | 2015-10-14 | 环球石材（东莞）股份有限公司 | A kind of shaped stone material modeling and adding construction equipment |
| CN109108804A (en) * | 2018-11-09 | 2019-01-01 | 嵊州市天骏电器有限公司 | A kind of burnishing device for the production of range hood master control panel |
| CN209350056U (en) * | 2018-12-24 | 2019-09-06 | 肇庆美凌环保机械科技有限公司 | A kind of grinder is combined the unit with head holder |
| CN109434629A (en) * | 2019-01-24 | 2019-03-08 | 烟台工程职业技术学院(烟台市技师学院) | Burnishing machine is used in a kind of processing of mechanized equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114619323A (en) * | 2020-12-11 | 2022-06-14 | 宜宾市创世纪机械有限公司 | A kind of tool |
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Application publication date: 20200901 |
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| RJ01 | Rejection of invention patent application after publication |