CN117123767A - A high-pressure water clear shell rotating clamping device - Google Patents
A high-pressure water clear shell rotating clamping device Download PDFInfo
- Publication number
- CN117123767A CN117123767A CN202311083890.2A CN202311083890A CN117123767A CN 117123767 A CN117123767 A CN 117123767A CN 202311083890 A CN202311083890 A CN 202311083890A CN 117123767 A CN117123767 A CN 117123767A
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- China
- Prior art keywords
- valve body
- piston
- air inlet
- pressure water
- clamping device
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D31/00—Cutting-off surplus material, e.g. gates; Cleaning and working on castings
- B22D31/002—Cleaning, working on castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
- B08B3/022—Cleaning travelling work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
Abstract
The invention relates to a high-pressure water shell cleaning rotary clamping device, which comprises: a work table; an electric turntable rotatably provided on the table; a support assembly disposed on the electric turntable, adapted to support a bottom of the valve body; the upright post is vertically arranged on the workbench; the compressing assembly is fixedly connected with the upright post, is positioned above the valve body and is suitable for compressing the valve body; valve body bottom sprag is on supporting component, and supporting component sets up electric turntable on, compresses tightly the subassembly and passes through the stand setting at the top of valve body, and compresses tightly the subassembly and act on the valve body top all the time, has realized the location of valve body through the top of valve body, bottom sprag like this, and electric turntable rotates, drives the valve body and rotates, adds the abrasive material in the high-pressure water, adopts the valve body on the scanning washs swivel clamp, finally gets rid of all casings on cladding product surface, obtains required part, has realized the washing to the valve body.
Description
Technical Field
The invention relates to the field of valve body clamping, in particular to a high-pressure water clean shell rotary clamping device.
Background
The investment casting product is adopted, a layer of sand-bonded shell is coated on the surface of the product after casting, the adhesion between the shell and the valve body is high, and the shell is very difficult to clean after casting;
when the surface shell is removed by cleaning the valve body, the shell is separated layer by layer, and the whole appearance is gradually reduced, so that the positioning and locking are difficult;
in summary, how to clean the valve body and continuously locate the valve body is an urgent problem to be solved by researchers in the field.
Disclosure of Invention
The invention aims to solve the technical problems that: how to realize the cleaning of the valve body and the continuous positioning and locking of the valve body during the cleaning.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to a high-pressure water shell cleaning rotary clamping device, which comprises: a work table; an electric turntable rotatably provided on the table; a support assembly disposed on the electric turntable, adapted to support a bottom of the valve body; the upright post is vertically arranged on the workbench; the compressing assembly is fixedly connected with the upright post, is positioned above the valve body and is suitable for compressing the valve body; the bottom of the valve body is arranged on the supporting component, the top of the valve body is pressed by the pressing component, and the electric rotating table rotates to drive the valve body to synchronously rotate;
in the scheme, the bottom of the valve body is supported on a supporting component, the supporting component is arranged on an electric turntable, a pressing component is arranged at the top of the valve body through an upright post, and the pressing component always acts on the top of the valve body, so that the positioning of the valve body is realized through the top and bottom supports of the valve body, the electric turntable rotates to drive the valve body to rotate, abrasive materials are added into high-pressure water, the valve body on a rotating clamp is cleaned by scanning, all shells wrapping the surface of a product are finally removed, required parts are obtained, and the cleaning of the valve body is realized;
in addition in this scheme, the horizontal segment of stand can be to vertical section go on lifting adjustment, will compress tightly the subassembly setting at the reasonable height for the valve body top.
To illustrate the specific construction of the support assembly, the present invention employs a support assembly comprising: the sliding groove is formed in the electric turntable; the two sliding blocks are arranged in the sliding groove in a sliding manner; the V-shaped supporting block is fixedly connected with the corresponding sliding block and is suitable for supporting the bottom of the valve body;
the two sliding blocks are arranged in the sliding grooves in a sliding manner so as to adapt to the support of valve bodies with different lengths, the sliding blocks are fixed with the V-shaped supporting blocks, and the valve bodies are supported on the two V-shaped supporting blocks, so that the support of the valve bodies is realized.
In order to clean the shell on the surface of the valve body as much as possible, the cross section of the V-shaped supporting block is an arc-shaped surface;
the V-shaped supporting block is in point contact with the valve body, so that the shell on the surface of the valve body can be cleaned, and the supporting part is prevented from being unwashed.
To illustrate the specific structure of the compression assembly, the present invention employs a compression assembly comprising: the top of the cylinder body is provided with an air inlet; the cylinder cover is arranged at the bottom of the cylinder body; the piston rod is movably arranged in the cylinder body, and the end part of the piston rod is propped against the valve body; filling gas into the cylinder body through the gas inlet to drive the piston rod to move up and down;
and air is introduced into the cylinder body through the air inlet, so that the piston rod is driven to perform lifting movement, the end part of the piston rod is propped against the top of the valve body, and the top of the valve body is pressed and positioned.
In order to realize point contact between the end part of the piston rod and the valve body, the invention adopts the structure that the end part of the piston rod is provided with a sphere which is in point contact with the top part of the valve body;
the ball body is in point contact with the top of the valve body, so that the surface of the valve body is conveniently cleaned.
In order to explain a specific structure in a cylinder body, the invention adopts a structure that a first step hole, a second step hole and a third step hole with gradually increased sections are sequentially arranged in the cylinder body from top to bottom; the piston rod is sequentially provided with a first piston for sealing the first step hole, a second piston for sealing the second step hole and a third piston for sealing the third step hole from top to bottom; the first step hole is matched with the first piston to form a first chamber; the second step hole is matched with the second piston to form a second chamber; the second step hole is matched with the second piston to form a third chamber; the air inlet is provided with a second air inlet which is communicated with the second chamber; a third air inlet which is communicated with the third chamber is formed at the air inlet; a second guide locking part which is suitable for blocking a second air inlet is vertically arranged on the second piston; a third guide locking part which is suitable for blocking a third air inlet is vertically arranged on the third piston;
in the scheme, the thickness of the valve body is gradually reduced in the cleaning process of the shell, so that the piston rod can gradually extend out; specifically, gas is introduced into the first cavity through the gas inlet, the gas acts on the first piston to enable the piston rod to descend, at the moment, the second guide locking part is blocked in the second gas inlet, and the third guide locking part is blocked in the third gas inlet; when the piston rod descends to a certain position, the second guide locking part does not block the second air inlet, at the moment, the air can enter the second cavity through the second air inlet, at the moment, the air acts on the first piston and the second piston at the same time, and the piston rod can provide larger downward pressure; similarly, when the piston rod needs larger downward pressure, the third air inlet is not blocked, air enters the third cavity, and the air acts on the third piston, so that the downward pressure of the piston rod is increased.
In order to realize the reset after the piston is pressed down, the invention adopts the space between the third piston and the cylinder cover, and the piston rod is sleeved with a spring;
when the air is not introduced into the cylinder body through the arrangement of the spring, the piston rod is reset.
In order to prevent the piston rod from moving to the limit position and the damage of the cylinder body from happening, the invention adopts the structure that a limiting rod is vertically arranged on the cylinder cover; when the third piston moves downwards to the limit position, the limiting rod abuts against the third piston to limit the third piston to continue to move downwards;
through the vertical rigid limiting rod, the continuous descending of the third piston is limited, and the possibility of damaging the cylinder body is avoided.
In order to explain the concrete structure of the second guiding locking part and the third locking part, the invention adopts the structure of the second guiding locking part and the third guiding locking part which are identical, and the invention comprises the following steps: the cylinder is matched with the inner diameter of the second air inlet or the third air inlet, and the outer wall of the cylinder is sleeved with a sealing ring; a guide piece is arranged at the top of the column body and positioned in the second air inlet or the third air inlet, and a ventilation gap is arranged between the guide piece and the second air inlet or the third air inlet;
the second guide locking part and the third guide locking part have the same structure, the bottom parts of the second guide locking part and the third guide locking part are cylinders, the middle part of the second guide locking part and the third guide locking part are sleeved with sealing rings, and the top part of the second guide locking part and the third guide locking part is a guide piece, so that the guide function can be realized, and the function of gas passing can be realized;
specifically, when the cylinder is positioned in the corresponding air inlet, the air inlet is in a sealed and unvented state mainly by virtue of the sealing ring, when the second or third piston descends, the cylinder moves along with the cylinder and is separated from the corresponding air inlet, gas enters the next chamber through the ventilation gap, the guide piece is positioned in the corresponding air inlet, and the guide piece is used for preventing the piston rod from rotating;
therefore, the second guide locking part and the third guide locking part play a role in guiding and sealing.
The invention has the beneficial effects that: the invention relates to a high-pressure water shell cleaning rotary clamping device, wherein the bottom of a valve body is supported on a supporting component, the supporting component is provided with an electric turntable, a pressing component is arranged at the top of the valve body through an upright post, the pressing component always acts on the top of the valve body and always provides a stable pressing force after overcoming the force of a return spring, so that the positioning and locking of the valve body are realized through the top and bottom support of the valve body, the electric turntable rotates to drive the valve body to rotate, abrasive materials are added into high-pressure water, the valve body on a rotary clamp is cleaned by scanning, all shells wrapping the surface of a product are finally removed, required parts are obtained, and the cleaning of the valve body is realized.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the structure of the slider of the present invention;
FIG. 3 is a cross-sectional view of the hold down assembly;
fig. 4 is a schematic structural view of the second guide locking portion or the third guide locking portion;
in the figure: 1-workbench, 2-electric turntable, 3-valve body, 4-upright post, 5-compression component, 6-sliding groove, 7-sliding block, 8-cylinder, 9-air inlet, 10-cylinder cover, 11-piston rod, 12-sphere, 13-first piston, 14-second piston, 15-third piston, 16-first chamber, 17-second chamber, 18-third chamber, 19-second air inlet, 20-third air inlet, 21-second guide locking part, 22-third guide locking part, 23-spring, 24-limit rod, 25-cylinder, 26-sealing ring, 27-guide piece, 28-ventilation gap and 71-sliding block.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only the structures which are relevant to the invention.
As shown in fig. 1, the present invention is a high-pressure water cleaning shell rotary clamping device, comprising: a work table 1; an electric turntable 2 rotatably provided on the table 1; a support assembly provided on the electric turntable 2, adapted to support the bottom of the valve body 3; the upright post 4 is vertically arranged on the workbench 1; the compressing assembly 5 is fixedly connected with the upright post 4, is positioned above the valve body 3 and is suitable for compressing the valve body 3; the bottom of the valve body 3 is arranged on the supporting component, the top of the valve body is pressed by the pressing component 5, and the electric rotating table 2 rotates to drive the valve body 3 to synchronously rotate;
in the scheme, the bottom of the valve body is supported on a supporting component, the supporting component is arranged on an electric turntable, a pressing component is arranged at the top of the valve body through an upright post, and the pressing component always acts on the top of the valve body, so that the positioning of the valve body is realized through the top and bottom supports of the valve body, the electric turntable rotates to drive the valve body to rotate, abrasive materials are added into high-pressure water, the valve body on a rotating clamp is cleaned by scanning, all shells wrapping the surface of a product are finally removed, required parts are obtained, and the cleaning of the valve body is realized;
in addition in this scheme, the horizontal segment of stand can be to vertical section go on lifting adjustment, will compress tightly the subassembly setting at the reasonable height for the valve body top.
As shown in fig. 1-2, to illustrate a specific structure of the support assembly, the present invention employs a support assembly comprising: a sliding groove 6 which is formed in the electric turntable 2; two sliders 71 slidably disposed in the slide grooves 6; a V-shaped supporting block 7 fixedly connected to the corresponding slider 71, adapted to support the bottom of the valve body 3;
the two sliding blocks are arranged in the sliding grooves in a sliding manner so as to adapt to the support of valve bodies with different lengths, the sliding blocks are fixed with the V-shaped supporting blocks, and the valve bodies are supported on the two V-shaped supporting blocks, so that the support of the valve bodies is realized.
As shown in fig. 2, in order to clean the shell on the surface of the valve body as much as possible, the cross section of the V-shaped supporting block 7 is an arc surface;
the V-shaped supporting block is in point contact with the valve body, so that the shell on the surface of the valve body can be cleaned, and the supporting part is prevented from being unwashed.
As shown in fig. 3, in order to illustrate a specific structure of the pressing assembly, the present invention employs a pressing assembly 5 including: a cylinder 8, the top of which is provided with an air inlet 9; a cylinder head 10 provided at the bottom of the cylinder block 8; a piston rod 11 movably disposed in the cylinder 8, and having an end portion abutting against the valve body 3; filling gas into the cylinder 8 through the gas inlet 9 to drive the piston rod 11 to move up and down;
and air is introduced into the cylinder body through the air inlet, so that the piston rod is driven to perform lifting movement, the end part of the piston rod is propped against the top of the valve body, and the top of the valve body is pressed and positioned.
As shown in fig. 3, in order to realize point contact between the end of the piston rod and the valve body, the end of the piston rod 11 is provided with a sphere 12, and the sphere 12 is in point contact with the top of the valve body 3;
the ball body is in point contact with the top of the valve body, so that the surface of the valve body is conveniently cleaned.
As shown in fig. 3, in order to explain a specific structure in the cylinder body, the invention adopts a structure that a first step hole, a second step hole and a third step hole with gradually increased sections are sequentially arranged in the cylinder body 8 from top to bottom; the piston rod 11 is provided with a first piston 13 for sealing the first step hole, a second piston 14 for sealing the second step hole and a third piston 15 for sealing the third step hole in sequence from top to bottom; the first stepped hole is matched with the first piston 13 to form a first chamber 16; the second stepped bore cooperates with the second piston 14 to form a second chamber 17; the second stepped hole cooperates with the second piston 15 to form a third chamber 18; a second air inlet 19 which opens into the second chamber 17 is branched from the air inlet 9; a third air inlet 20 which opens into the third chamber 18 is branched from the air inlet 9; a second guide locking part 21 which is suitable for blocking the second air inlet 19 is vertically arranged on the second piston 14; a third guide locking part 22 which is suitable for blocking the third air inlet 20 is vertically arranged on the third piston 15;
in the scheme, the thickness of the valve body is gradually reduced in the cleaning process of the shell, so that the piston rod can gradually extend out; specifically, gas is introduced into the first cavity through the gas inlet, the gas acts on the first piston to enable the piston rod to descend, at the moment, the second guide locking part is blocked in the second gas inlet, and the third guide locking part is blocked in the third gas inlet; when the piston rod descends to a certain position, the second guide locking part does not block the second air inlet, at the moment, the air can enter the second cavity through the second air inlet, at the moment, the air acts on the first piston and the second piston at the same time, and the piston rod can provide larger downward pressure; similarly, when the piston rod needs larger downward pressure, the third air inlet is not blocked, air enters the third cavity, and the air acts on the third piston, so that the downward pressure of the piston rod is increased.
As shown in fig. 3, in order to realize the reset after the piston is pressed down, the present invention adopts the space between the third piston 15 and the cylinder cover 10, and the piston rod 11 is sleeved with a spring 23;
when the air is not introduced into the cylinder body through the arrangement of the spring, the piston rod is reset.
As shown in fig. 3, in order to prevent the piston rod from moving to the limit position, which may cause damage to the cylinder, the present invention employs the cylinder cover 10 vertically provided with a stop lever 24; when the third piston 15 moves down to the limit position, the limiting rod 24 abuts against the third piston 15 to limit the third piston 15 to continue to move down;
through the vertical rigid limiting rod, the continuous descending of the third piston is limited, and the possibility of damaging the cylinder body is avoided.
As shown in fig. 4, in order to illustrate the specific structures of the second guide locking portion and the third locking portion, the present invention adopts the second guide locking portion 21 and the third guide locking portion 22 to have the same structure, and each includes: a cylinder 25, which is matched with the inner diameter of the second air inlet 19 or the third air inlet 20, and the outer wall of which is sleeved with a sealing ring 26; a guide 27 provided at the top of the cylinder 25 and located in the second air inlet 19 or the third air inlet 20, and provided with a ventilation gap 28 with the second air inlet 19 or the third air inlet 20;
the second guide locking part and the third guide locking part have the same structure, the bottom parts of the second guide locking part and the third guide locking part are cylinders, the middle part of the second guide locking part and the third guide locking part are sleeved with sealing rings, and the top part of the second guide locking part and the third guide locking part is a guide piece, so that the guide function can be realized, and the function of gas passing can be realized;
specifically, when the cylinder is positioned in the corresponding air inlet, the air inlet is in a sealed and unvented state mainly by virtue of the sealing ring, when the second or third piston descends, the cylinder moves along with the cylinder and is separated from the corresponding air inlet, gas enters the next chamber through the ventilation gap, the guide piece is positioned in the corresponding air inlet, and the guide piece is used for preventing the piston rod from rotating;
therefore, the second guide locking part and the third guide locking part play a role in guiding and sealing.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (9)
1. The utility model provides a rotatory clamping device of clear shell of high pressure water which characterized in that includes:
a work table;
an electric turntable rotatably provided on the table;
a support assembly disposed on the electric turntable, adapted to support a bottom of the valve body;
the upright post is vertically arranged on the workbench;
the compressing assembly is fixedly connected with the upright post, is positioned above the valve body and is suitable for compressing the valve body;
the bottom of the valve body is arranged on the supporting component, the top of the valve body is pressed by the pressing component, and the electric rotating table rotates to drive the valve body to synchronously rotate.
2. The high pressure water jacket rotating clamping device of claim 1, wherein the support assembly comprises:
the sliding groove is formed in the electric turntable;
the two sliding blocks are arranged in the sliding groove in a sliding manner;
and the V-shaped supporting block is fixedly connected with the corresponding sliding block and is suitable for supporting the bottom of the valve body.
3. The high-pressure water cleaning shell rotary clamping device according to claim 2, wherein the cross section of the V-shaped supporting block is an arc-shaped surface.
4. The high pressure water jacket rotating clamping device of claim 1, wherein the compression assembly comprises:
the top of the cylinder body is provided with an air inlet;
the cylinder cover is arranged at the bottom of the cylinder body;
the piston rod is movably arranged in the cylinder body, and the end part of the piston rod is propped against the valve body;
and filling gas into the cylinder body through the gas inlet to drive the piston rod to move up and down.
5. The high-pressure water cleaning shell rotary clamping device according to claim 4, wherein a ball is arranged at the end of the piston rod, and the ball is in point contact with the top of the valve body.
6. The high-pressure water shell cleaning rotary clamping device according to claim 4, wherein a first step hole, a second step hole and a third step hole with gradually increased cross sections are sequentially formed in the cylinder body from top to bottom;
the piston rod is sequentially provided with a first piston for sealing the first step hole, a second piston for sealing the second step hole and a third piston for sealing the third step hole from top to bottom;
the first step hole is matched with the first piston to form a first chamber;
the second step hole is matched with the second piston to form a second chamber;
the second step hole is matched with the second piston to form a third chamber;
the air inlet is provided with a second air inlet which is communicated with the second chamber;
a third air inlet which is communicated with the third chamber is formed at the air inlet;
a second guide locking part which is suitable for blocking a second air inlet is vertically arranged on the second piston;
and a third guide locking part which is suitable for blocking the third air inlet is vertically arranged on the third piston.
7. The high-pressure water cleaning shell rotary clamping device according to claim 6, wherein a spring is sleeved on the piston rod between the third piston and the cylinder cover.
8. The high-pressure water cleaning shell rotary clamping device according to claim 7, wherein a limiting rod is vertically arranged on the cylinder cover;
when the third piston moves downwards to the limit position, the limiting rod abuts against the third piston to limit the third piston to continue to move downwards.
9. The rotary clamping device for high-pressure water cleaning shells according to claim 6, wherein the second guiding locking part and the third guiding locking part are identical in structure and comprise:
the cylinder is matched with the inner diameter of the second air inlet or the third air inlet, and the outer wall of the cylinder is sleeved with a sealing ring;
and the guide piece is arranged at the top of the cylinder and positioned in the second air inlet or the third air inlet, and a ventilation gap is arranged between the guide piece and the second air inlet or the third air inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311083890.2A CN117123767A (en) | 2023-08-25 | 2023-08-25 | A high-pressure water clear shell rotating clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311083890.2A CN117123767A (en) | 2023-08-25 | 2023-08-25 | A high-pressure water clear shell rotating clamping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117123767A true CN117123767A (en) | 2023-11-28 |
Family
ID=88860932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311083890.2A Pending CN117123767A (en) | 2023-08-25 | 2023-08-25 | A high-pressure water clear shell rotating clamping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117123767A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1061609A (en) * | 1996-08-14 | 1998-03-06 | Kazuo Katano | Fluid pressure actuator device and its assembling method |
| CN102078973A (en) * | 2010-12-29 | 2011-06-01 | 广州市昊志机电有限公司 | Roll ball high-speed electronic spindle |
| CN106523464A (en) * | 2016-12-30 | 2017-03-22 | 深圳市银宝山新科技股份有限公司 | Three-layer piston cylinder |
| CN207045321U (en) * | 2017-08-16 | 2018-02-27 | 中车青岛四方车辆研究所有限公司 | A kind of average valve calculated multichannel air pressure |
| CN214868947U (en) * | 2021-06-26 | 2021-11-26 | 邢台职业技术学院 | Rotation type frock clamp suitable for numerical control of multiple model gate valve processing |
-
2023
- 2023-08-25 CN CN202311083890.2A patent/CN117123767A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1061609A (en) * | 1996-08-14 | 1998-03-06 | Kazuo Katano | Fluid pressure actuator device and its assembling method |
| CN102078973A (en) * | 2010-12-29 | 2011-06-01 | 广州市昊志机电有限公司 | Roll ball high-speed electronic spindle |
| CN106523464A (en) * | 2016-12-30 | 2017-03-22 | 深圳市银宝山新科技股份有限公司 | Three-layer piston cylinder |
| CN207045321U (en) * | 2017-08-16 | 2018-02-27 | 中车青岛四方车辆研究所有限公司 | A kind of average valve calculated multichannel air pressure |
| CN214868947U (en) * | 2021-06-26 | 2021-11-26 | 邢台职业技术学院 | Rotation type frock clamp suitable for numerical control of multiple model gate valve processing |
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