CN109202714B - Polishing clamp for thimble for producing rotor and operation method thereof - Google Patents
Polishing clamp for thimble for producing rotor and operation method thereof Download PDFInfo
- Publication number
- CN109202714B CN109202714B CN201811157619.8A CN201811157619A CN109202714B CN 109202714 B CN109202714 B CN 109202714B CN 201811157619 A CN201811157619 A CN 201811157619A CN 109202714 B CN109202714 B CN 109202714B
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- China
- Prior art keywords
- positioning block
- positioning
- thimble
- polishing
- adjusting
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Classifications
-
- 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
- B24B41/06—Work supports, e.g. adjustable steadies
-
- 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
- B24B19/16—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding sharp-pointed workpieces, e.g. needles, pens, fish hooks, tweezers or record player styli
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention discloses a polishing clamp for producing a thimble for a rotor and an operation method thereof, the polishing clamp comprises a clamp body, the clamp body comprises a first positioning block, a second positioning block and a supporting connecting rod for supporting and limiting the first positioning block and the second positioning block, the second positioning block is provided with a guiding and mounting structure for guiding the thimble to the first positioning block, a positioning mechanism for positioning the thimble and an inclined plane for jointing and limiting a grinding positioning plate of a grinding bed so as to adjust the turning angle of the clamp body, and the first positioning block is provided with a guiding and limiting structure for guiding the thimble to pass through a polishing end of the thimble and limiting the polishing end of the thimble. The clamp is simple to operate, can well position the thimble, and can polish a required inclination angle.
Description
Technical Field
The invention belongs to the technical field of auxiliary equipment for producing rotors, and particularly relates to a polishing clamp for a thimble for producing a rotor and an operation method thereof.
Background
The rotor is produced by using a thimble fitting, the head of the thimble is easy to wear and deform due to frequent use, and the head of some new thimbles needs to be polished to a required angle. The manual polishing of the thimble consumes time and labor, and if misoperation occurs in the polishing process, the phenomenon of incised wound is easy to cause for human body. The polishing end of the thimble often needs to polish a plurality of angles, is difficult to control by manual pinching, easily causes direction deviation, and the polishing angle is not well controlled. In addition, the thimble is thinner, if the thimble is not well limited and positioned, the situation of bending easily occurs in the polishing process.
Disclosure of Invention
The invention aims to solve the technical problems existing in the prior art. Therefore, the invention provides a polishing clamp for producing a thimble for a rotor and an operation method thereof, and aims to facilitate limiting clamping of the thimble and polishing a required angle by matching with a grinding machine.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a polishing clamp of thimble for production rotor and operation method thereof, includes the anchor clamps body, the anchor clamps body includes first locating piece, second locating piece and supports the support connecting rod of spacing connection first locating piece and second locating piece, the second locating piece is equipped with the direction mounting structure with the thimble direction first locating piece, carries out the positioning mechanism that fixes a position the thimble and is used for laminating spacing in order to adjust anchor clamps body flip angle with the grinding locating plate of grinding bed inclined plane, and first locating piece is equipped with and is used for the direction to pass the thimble and polishes the end and can carry out spacing direction limit structure to the thimble.
The guide mounting structure comprises a guide channel and a groove which is arranged at the bottom end of the second positioning block and communicated with the guide channel, and the axial direction of the guide channel points to the guide limiting structure of the first positioning block.
The positioning mechanism comprises a first adjusting bolt and a positioning hole which is at least arranged on one side wall of the second positioning block and communicated with the guide channel, and the first adjusting bolt passes through the positioning hole to carry out interference positioning on the thimble penetrating into the guide channel.
The guide limiting structure is a strip-shaped through hole.
The groove is arranged in the middle of the bottom end of the second positioning block, the groove length of the groove is the same as the length of the second positioning block, a plurality of guide channels are uniformly distributed in the length direction of the second positioning block and are mutually parallel, and the guide extending direction of the guide channels is the same as the height direction of the second positioning block.
The positioning mechanism comprises a plurality of first adjusting bolts and a row of positioning holes at least arranged on one side wall of the second positioning block, and the number of the positioning holes is the same as that of the guide channels.
The two inclined surfaces are symmetrically arranged on two sides of the groove, and the inclined surfaces are arranged below the side wall where the positioning mechanism is located.
The support connecting rods are two, one end of the first positioning block is connected with one end of the same side of the second positioning block through one support connecting rod, and the other end of the first positioning block is connected with one end of the same side of the second positioning block through the other support connecting rod.
The first positioning block and/or the second positioning block are/is movably connected with the supporting connecting rod, and the polishing clamp further comprises an adjusting mechanism used for adjusting the first positioning block and/or the second positioning block to move along the length direction of the supporting connecting rod so as to adjust the distance between the first positioning block and the second positioning block.
The adjusting mechanism comprises a second adjusting bolt and an adjusting hole arranged on the side wall of the first positioning block and/or the side wall of the second positioning block, and the supporting connecting rod is adjusted and limited by adjusting the extrusion force of the second adjusting bolt penetrating through the adjusting hole.
The plurality of positioning holes are arranged along the length direction of at least one side wall of the second positioning block, and the connecting lines among the plurality of positioning holes form a straight line.
The invention also provides a polishing clamp for producing the thimble for the rotor and an operation method of the polishing clamp, which comprises the following steps:
step one, positioning and mounting a thimble on two positioning blocks;
and secondly, placing the polishing clamp on a grinding positioning plate, and polishing the thimble polishing end through a polishing cutter of a grinder.
The invention has the beneficial effects that: the polishing clamp is convenient for guiding and limiting installation of the ejector pin, two ends of the ejector pin are respectively and limitedly installed in the two positioning blocks, and the polishing end of the ejector pin extends out of the positioning blocks, so that the polishing clamp is convenient for being matched with a grinding machine to use for polishing. The arrangement of the inclined surface at the bottom of the positioning block ensures that when the thimble needs to polish the inclined angle line, the inclined surface is limited, attached and fixed on the grinding positioning plate of the grinding machine, so that the mould on the grinding machine can conveniently polish the inclined angle line. The setting of recess is convenient for the thimble penetrate the locating piece and installs, and when the cooperation grinding machine is polished, the bottom of thimble is installed in the recess inside, can not form the interference with the grinding locating plate of grinding machine. The arrangement of the adjusting bolt and the adjusting hole plays a role in adjusting and fastening. The clamp is simple to operate, can well position the thimble, and can polish a required inclination angle.
Drawings
The present specification includes the following drawings, the contents of which are respectively:
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic side view of the present invention without locating holes;
FIG. 3 is a bottom surface structure of the present invention;
FIG. 4 is a schematic view of the structure of the present invention after mounting the ejector pins;
fig. 5 is a schematic view showing a structure in which the polishing jig of the present invention is attached to a polishing positioning plate of a polishing machine.
Marked in the figure as:
1. the device comprises a first positioning block 2, a second positioning block 3, a supporting connecting rod 4, a thimble 5, a grinding positioning plate 6, a guide channel 7, a groove 8, a positioning block 9, an adjusting hole 10, a strip-shaped through hole 11 and an inclined plane.
Detailed Description
The following detailed description of the embodiments of the invention, given by way of example only, is presented in the accompanying drawings to aid in a more complete, accurate and thorough understanding of the concepts and aspects of the invention, and to aid in its practice, by those skilled in the art.
As shown in fig. 1 to 5, a polishing clamp for producing a thimble for a rotor and an operation method thereof, the polishing clamp comprises a clamp body, the clamp body comprises a first positioning block 1, a second positioning block 2 and a supporting connecting rod 3 for supporting and limiting the first positioning block 1 and the second positioning block 2, the second positioning block 2 is provided with a guiding and mounting structure for guiding the thimble 4 to the first positioning block 1, a positioning mechanism for positioning the thimble 4 and an inclined surface 11 for being attached and limited with a grinding positioning plate 5 of a grinding bed to adjust the turning angle of the clamp body, and the first positioning block 1 is provided with a guiding and limiting structure for guiding a polishing end passing through the thimble and limiting the polishing end of the thimble. The arrangement of the guide mounting structure is convenient for guide the first positioning block during the installation of the ejector pins, and the ejector pins are in spacing installation with the two positioning blocks through the action of the guide mounting structure of the second positioning block and the guide spacing structure of the first positioning block, and then the ejector pins are fastened and positioned through the positioning action of the positioning mechanism arranged on the second positioning block, so that the ejector pins are fixedly arranged on the two positioning blocks, and the ejector pins can be polished conveniently by the follow-up matched grinding machine. The arrangement of the inclined surface at the bottom of the positioning block ensures that when the thimble needs to polish the inclined angle line, the inclined surface is limited, attached and fixed on the grinding positioning plate of the grinding machine, so that the mould on the grinding machine can conveniently polish the inclined angle line. The first positioning block and the second positioning block are arranged in parallel and are connected through a support connecting rod. The guide limit structure is preferably a strip-shaped through hole 10, the strip-shaped through hole plays a role in guiding in the axial direction, the axial side wall plays a role in limiting, the polishing end of the thimble is of a flat structure, the shape of the polishing end of the thimble can be more adapted through the arrangement of the strip-shaped through hole, and the relatively better guiding and limiting effects are achieved.
The guide mounting structure comprises a guide channel 6 and a groove 7 which is arranged at the bottom end of the second positioning block and communicated with the guide channel, and the axial direction of the guide channel 6 points to the guide limiting structure of the first positioning block 1. The setting of recess is convenient for the thimble penetrate the second locating piece and installs, and when the cooperation grinding machine is polished, the bottom of thimble is installed in the recess inside, can not form the interference with the grinding locating plate of grinding machine. The guide channel preferably adopts a guide through hole, the axial direction of the guide through hole is the same as the height direction of the second positioning block, namely, the guide limit structure points to the first positioning block, the thimble is convenient to penetrate from the groove at the bottom of the second positioning block, then the thimble is guided and inserted into the guide limit structure of the first positioning block through the guide effect of the guide through hole, and the top polishing end of the thimble extends out of the guide limit structure, so that the thimble is convenient to polish subsequently.
The positioning mechanism comprises a first adjusting bolt and a positioning hole 8 which is at least arranged on one side wall of the second positioning block and communicated with the guide channel, and the first adjusting bolt passes through the positioning hole 8 to carry out abutting positioning on the thimble penetrating into the guide channel 6. The internal diameter of the guide channel is generally slightly larger than the external diameter of the thimble, and the thimble is required to be positioned and fixed after being installed on the two positioning blocks through the guide installation structure, so that the thimble is prevented from shaking and the polishing angle is prevented from being influenced. When the thimble is required to be installed, the first adjusting bolt is unscrewed, at the moment, the first adjusting bolt cannot form an interference limiting effect with the thimble, the thimble can be smoothly installed at the corresponding positions of the two positioning blocks through the installation process, then the first adjusting bolt is screwed, one end of the first adjusting bolt penetrates through the positioning hole to form interference limiting with the thimble part in the guide channel, and then the thimble is well limited and fixedly installed on the two positioning blocks.
Further, the groove 7 is disposed in the middle of the bottom end of the second positioning block 2, the groove length of the groove 7 is the same as the length of the second positioning block 2, the plurality of guiding channels 6 are uniformly distributed in the length direction of the second positioning block 2, the plurality of guiding channels 6 are parallel to each other, and the guiding extending direction of the guiding channels 6 is the same as the height direction of the second positioning block 2, namely, the guiding limiting structure pointing to the first positioning block. Correspondingly, the positioning mechanism comprises a plurality of first adjusting bolts and a row of positioning holes 8 at least arranged on one side wall of the second positioning block, and the number of the positioning holes 8 is the same as that of the guiding channels 6. At this time, the plurality of positioning holes 8 are arranged along the length direction of at least one side wall of the second positioning block 2, and the connecting lines between the plurality of positioning holes form a straight line, so that a one-to-one matching positioning relationship is formed with the guiding channel. Preferably, the two inclined surfaces are symmetrically arranged on two sides of the groove, and the inclined surfaces are arranged below the positioning holes and the side wall where the first adjusting bolt is arranged. Specifically, the bottom surface of the second positioning block is a plane, the grooves are formed in the middle branching position of the plane, two ends of the bottom plane are connected with two inclined planes which incline upwards, the two inclined planes are symmetrically arranged with the middle branching of the length direction of the second positioning block, the side surface of the positioning hole is perpendicular to the bottom plane, the opposite side surface of the positioning hole is parallel to the opposite side surface of the positioning hole, and the top end surface of the second positioning block is of a plane structure and is parallel to the bottom plane of the second positioning block. By adopting the structure, when the bottom plane of the second positioning block is placed on the grinding positioning plate of the grinding machine, the thimble grinding end can be horizontally ground through the die on the grinding machine, and when the inclined plane of the second positioning block is placed on the grinding positioning plate of the grinding machine, the inclined plane structure of the special structure of the second positioning block can be used for polishing the thimble grinding end at an inclined angle through the die on the grinding machine. The grinding locating plate can be a magnetic plate with strong magnetism, and the second locating block is made of iron blocks, so that the second locating block can be attracted and fixed on the magnetic plate.
In order to increase the stability of the supporting connection of the two positioning blocks, the number of the supporting connecting rods 3 is preferably two, one end of the first positioning block 1 is connected with one end of the same side of the second positioning block 2 through one supporting connecting rod 3, and the other end of the first positioning block 1 is connected with one end of the same side of the other end of the second positioning block 2 through the other supporting connecting rod 3. At this time, the guide channel and the bar-shaped through hole are both positioned between the two support connecting rods.
As a further improvement, the first positioning block 1 and/or the second positioning block 2 are movably connected with the support link 3, and the polishing clamp further comprises an adjusting mechanism for adjusting the first positioning block 1 and/or the second positioning block 2 to move along the length direction of the support link 3 so as to adjust the distance between the first positioning block 1 and the second positioning block 2.
The adjusting mechanism comprises a second adjusting bolt and an adjusting hole 9 arranged on the side wall of the first positioning block and/or the side wall of the second positioning block, and the supporting connecting rod is adjusted and limited by adjusting the extrusion force of the second adjusting bolt penetrating through the adjusting hole. When the distance between the two positioning blocks needs to be adjusted to adapt to the thimble with different lengths, the second adjusting bolt is unscrewed, at the moment, the second adjusting bolt does not form an interference limiting effect with the supporting connecting rod, the first positioning block and/or the second positioning block can move relative to the supporting connecting rod, when the two positioning blocks are adjusted to a proper distance, the second adjusting bolt is screwed, one end of the second adjusting bolt penetrates through the adjusting hole 9 to form an interference limiting effect with the supporting connecting rod in the first positioning block and/or the second positioning block, and then the two positioning blocks form good position positioning.
The method for polishing the thimble by adopting the polishing clamp comprises the following steps:
firstly, unscrewing a second adjusting screw, adjusting the distance between two positioning blocks to reach a preset height according to the polishing length requirement of a thimble, and then screwing the second adjusting screw to enable the second adjusting screw to form a collision limit with a supporting connecting rod, wherein the relative distance between the two positioning blocks is determined; secondly, unscrewing a first adjusting bolt, penetrating a thimble from a groove at the bottom of a second positioning block, guiding the thimble to be inserted into a strip-shaped through hole of the first positioning block through the guiding action of a guiding through hole, extending out of the strip-shaped through hole from the polishing end at the top of the thimble, and screwing the first adjusting bolt, so that one end of the first adjusting bolt passes through the positioning hole to form a collision limit with the thimble part in a guiding channel, and further, the thimble is well limited and fixedly arranged on two positioning blocks; thirdly, placing the bottom end surface of the polishing clamp on a grinding positioning plate of a grinding machine, horizontally polishing through a polishing cutter of the grinding machine, and then turning over a second positioning block to enable an inclined surface of the second positioning block to be placed on the grinding positioning plate of the grinding machine, and polishing the polishing end of the thimble at an inclined angle through the polishing cutter on the grinding machine; fourth, after polishing the two inclined angles, the thimble is detached from the polishing clamp.
The invention is described above by way of example with reference to the accompanying drawings. It will be clear that the invention is not limited to the embodiments described above. As long as various insubstantial improvements are made using the method concepts and technical solutions of the present invention; or the invention is not improved, and the conception and the technical scheme are directly applied to other occasions and are all within the protection scope of the invention.
Claims (4)
1. The utility model provides a polishing clamp for producing thimble for rotor, includes the anchor clamps body, its characterized in that, the anchor clamps body includes first locating piece, second locating piece and supports the support connecting rod of spacing connection first locating piece and second locating piece, the second locating piece is equipped with the direction mounting structure that will lead the thimble to first locating piece, carries out the positioning mechanism that fixes a position to the thimble and is used for laminating spacing with the grinding locating plate of friction bed in order to adjust anchor clamps body flip angle's inclined plane, first locating piece is equipped with and is used for the direction to pass the thimble and polishes the end and can carry out spacing direction limit structure to the thimble;
the guide mounting structure comprises a guide channel and a groove which is arranged at the bottom end of the second positioning block and communicated with the guide channel, and the axial direction of the guide channel points to the guide limiting structure of the first positioning block;
the positioning mechanism comprises a first adjusting bolt and a positioning hole which is at least arranged on one side wall of the second positioning block and is communicated with the guide channel, and the first adjusting bolt passes through the positioning hole to carry out abutting positioning on the thimble penetrating into the guide channel;
the groove is formed in the middle of the bottom end of the second positioning block, the groove length of the groove is the same as the length of the second positioning block, a plurality of guide channels are uniformly distributed in the length direction of the second positioning block, the guide channels are parallel to each other, and the guide extending direction of the guide channels is the same as the height direction of the second positioning block;
the positioning mechanism comprises a plurality of first adjusting bolts and a row of positioning holes at least arranged on one side wall of the second positioning block, and the number of the positioning holes is the same as that of the guide channels;
the two inclined surfaces are symmetrically arranged on two sides of the groove, and the inclined surfaces are arranged below the side wall where the positioning mechanism is located;
the support connecting rods are two, one end of the first positioning block is connected with one end of the same side of the second positioning block through one support connecting rod, and the other end of the first positioning block is connected with one end of the same side of the second positioning block through the other support connecting rod.
2. The polishing jig for producing a thimble for a rotor according to claim 1, wherein the first positioning block and/or the second positioning block are movably connected with the support link, and the polishing jig further comprises an adjusting mechanism for adjusting the first positioning block and/or the second positioning block to move along the length direction of the support link so as to adjust the distance between the first positioning block and the second positioning block.
3. The polishing jig for producing a thimble for a rotor according to claim 2, wherein the adjusting mechanism includes a second adjusting bolt and an adjusting hole provided in a side wall of the first positioning block and/or the second positioning block, and the supporting link is adjusted and limited by adjusting the pressing force of the second adjusting bolt passing through the adjusting hole by tightness.
4. A method of operating a grinding jig for producing a thimble for a rotor according to any one of claims 1-3, comprising the steps of:
step one, positioning and mounting a thimble on two positioning blocks;
and secondly, placing the polishing clamp on a grinding positioning plate, and polishing the thimble polishing end through a polishing cutter of a grinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811157619.8A CN109202714B (en) | 2018-09-30 | 2018-09-30 | Polishing clamp for thimble for producing rotor and operation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811157619.8A CN109202714B (en) | 2018-09-30 | 2018-09-30 | Polishing clamp for thimble for producing rotor and operation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109202714A CN109202714A (en) | 2019-01-15 |
| CN109202714B true CN109202714B (en) | 2023-09-08 |
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ID=64982445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811157619.8A Active CN109202714B (en) | 2018-09-30 | 2018-09-30 | Polishing clamp for thimble for producing rotor and operation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109202714B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110065002B (en) * | 2019-04-17 | 2020-10-16 | 南京信息职业技术学院 | Valve block inclined plane grinding frock |
| CN113059427A (en) * | 2021-04-12 | 2021-07-02 | 渭南高新区木王科技有限公司 | Bevel grinding device for thin needle head of semiconductor probe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201720755U (en) * | 2010-07-28 | 2011-01-26 | 重庆东科模具制造有限公司 | Mould thimble clamping mechanism |
| CN201960353U (en) * | 2010-12-06 | 2011-09-07 | 耐普罗机械（天津）有限公司 | Flat ejector pin type workpiece machining jig |
| FR2999970A1 (en) * | 2012-12-20 | 2014-06-27 | Airbus Operations Sas | METHOD OF MAKING A CONTINUOUS FIBER TEXTILE PREFORM BY CIRCULATING A HOT GAS FLOW THROUGH A FIBROUS ASSEMBLY |
| CN206662990U (en) * | 2017-05-03 | 2017-11-24 | 东莞市誉山自动化科技有限公司 | A kind of localization tool for being easy to phone housing sanding and polishing |
| CN207736115U (en) * | 2017-12-29 | 2018-08-17 | 保定兆龙通用电器塑业有限公司 | High efficiency grinds the fixture of thimble |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140287661A1 (en) * | 2013-03-21 | 2014-09-25 | Princetel Inc. | Prussure module and polishing fixture module for fiber optic polisher |
-
2018
- 2018-09-30 CN CN201811157619.8A patent/CN109202714B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201720755U (en) * | 2010-07-28 | 2011-01-26 | 重庆东科模具制造有限公司 | Mould thimble clamping mechanism |
| CN201960353U (en) * | 2010-12-06 | 2011-09-07 | 耐普罗机械（天津）有限公司 | Flat ejector pin type workpiece machining jig |
| FR2999970A1 (en) * | 2012-12-20 | 2014-06-27 | Airbus Operations Sas | METHOD OF MAKING A CONTINUOUS FIBER TEXTILE PREFORM BY CIRCULATING A HOT GAS FLOW THROUGH A FIBROUS ASSEMBLY |
| CN206662990U (en) * | 2017-05-03 | 2017-11-24 | 东莞市誉山自动化科技有限公司 | A kind of localization tool for being easy to phone housing sanding and polishing |
| CN207736115U (en) * | 2017-12-29 | 2018-08-17 | 保定兆龙通用电器塑业有限公司 | High efficiency grinds the fixture of thimble |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109202714A (en) | 2019-01-15 |
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