CN114012612A - Shot blasting flow control device - Google Patents
Shot blasting flow control device Download PDFInfo
- Publication number
- CN114012612A CN114012612A CN202111392632.3A CN202111392632A CN114012612A CN 114012612 A CN114012612 A CN 114012612A CN 202111392632 A CN202111392632 A CN 202111392632A CN 114012612 A CN114012612 A CN 114012612A
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- Prior art keywords
- control valve
- valve
- control
- flange seat
- flow
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
- B24C7/0053—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier
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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)
- Flow Control (AREA)
Abstract
The invention provides a shot blasting flow control device which comprises a first control valve, a second control valve, a third control valve and a connecting part, wherein the upper end of the first control valve is connected with the lower end of a pressure tank of a sand blowing system, the lower end of the first control valve is connected with the second control valve, the lower end of the second control valve is connected with the third control valve, the lower part of the third control valve is further provided with a flow sensor, the first control valve, the second control valve and the third control valve are connected through the connecting part in an installing mode, the output end of the third control valve is connected with a sand conveying pipe, and the second control valve and the third control valve are electrically connected with a PLC (programmable logic controller) system arranged outside. The invention can conveniently realize the adjustment of the flow of the grinding material and has the advantages of high adjustment precision and good reliability.
Description
Technical Field
The invention relates to the technical field of shot blasting equipment, in particular to a shot blasting flow control device.
Background
Shot peening technology has appeared in the 70 th century, and at present, the shot peening technology has developed quite well abroad, and mechanical equipment related to the shot peening technology is gradually developed towards intellectualization. The research related to the shot blasting technology in China starts late, and in order to adapt to the development of advanced manufacturing industry and aerospace in China, the development speed of the shot blasting technology is continuously accelerated in recent years, but compared with the leading technology in foreign countries, the technology has a small gap.
The shot peening strengthening treatment is to utilize a rotating impeller or compressed air to drive the shot, and the shot is ejected at high speed to strike on the surface of the part, so that a layer of compressive stress layer is formed on the surface of the part, and the fatigue resistance of the part is further increased, thereby achieving the purpose of prolonging the service life of the part. The strengthening effect of the surface of the part is related to a plurality of factors, the main factors are the shot blasting time, distance, angle, the flow velocity, flow rate and size of the shot, and the factors influence the quality of shot blasting. Two important indicators for evaluating shot quality are: the intensity and the coverage rate, and the flow rate of the shot materials is controlled to be the most important to achieve the shot blasting intensity and the coverage rate required by the design.
At present, the shot control of a plurality of shot blasting machines is inconvenient, the output excess of the shot can cause the over-blasting deformation of parts, the output shortage of the shot can cause the incomplete shot blasting of the parts, and the coverage rate is too low.
There is a need for a device for controlling the flow rate of shot blasting shots, which can control the flow rate of the shots very accurately according to the requirement of shot blasting, and simultaneously, the flow rate of the shots is monitored in real time by an inductor to ensure reliability, thereby solving the above drawbacks.
Disclosure of Invention
The invention provides a shot blasting flow control device, which solves the problems that the existing shot blasting flow control structure is inconvenient in shot control, excessive output of the shot can cause over-blasting deformation of parts, insufficient output of the shot can cause incomplete shot blasting of the parts, and the coverage rate is too low by carrying out technical transformation on the existing shot blasting flow control structure.
In order to solve the technical problems, the invention specifically adopts the following technical scheme:
the utility model provides a peening flow control device, includes first control valve, second control valve, third control valve and connecting portion, first control valve upper end links to each other with sand blowing system pressure tank lower extreme, first control valve lower extreme is connected and is provided with the second control valve, and second control valve lower extreme is connected and is provided with the third control valve, third control valve lower part still is provided with flow sensor, through connecting portion erection joint between first control valve, second control valve and the third control valve, third control valve output links to each other with defeated sand pipe, just second control valve and third control valve are connected with the PLC control system electricity of outside setting.
Preferably, first control valve is manual stop valve, manual stop valve includes unloading barrel, valve structure and rotary control handle, unloading barrel department installation is provided with valve structure, valve structure is used for opening or cuts off the inside cavity of unloading barrel, the unloading barrel outside is provided with the rotary control handle, the rotary control handle output links to each other with valve structure, unloading barrel upper end is linked together with the overhead tank, and unloading barrel lower extreme passes through connecting portion and second control valve and links to each other.
Preferably, connecting portion include first flange seat, second flange seat, first connecting sleeve and second connecting sleeve, unloading barrel lower extreme is linked together through first connecting sleeve and second control valve, first connecting sleeve overcoat is equipped with first flange seat, just first flange seat and second control valve fixed connection, second control valve lower extreme links to each other with the third control valve through the second connecting sleeve, second connecting sleeve overcoat is equipped with second flange seat, just second flange seat and second control valve bottom surface fixed connection.
Preferably, the second control valve is a pneumatic butterfly valve, and the pneumatic butterfly valve is electrically connected with the PLC control system.
Preferably, the third control valve includes abrasive material entry, abrasive material export, valve body and flow control structure, the valve body upper end is provided with the abrasive material entry, abrasive material entry and second connecting sleeve intercommunication, the valve body lower extreme is provided with the abrasive material export, the abrasive material exit is provided with flow sensor, the abrasive material entry communicates with each other with the abrasive material export in the valve body, the lower extreme exit of abrasive material entry is provided with flow control structure, flow control structure is used for controlling abrasive material entrance passageway opening size.
Preferably, the flow control structure comprises a linear servo electric cylinder, a third flange seat, a connecting piece and a sealing plate, wherein the linear servo electric cylinder is fixedly connected to one side of the valve body through the third flange seat, the output end of the linear servo electric cylinder is connected with the connecting piece, the connecting piece is connected with the valve body in a sliding mode, the sealing plate is arranged at the position, close to the abrasive material inlet, of the connecting piece, the linear servo electric cylinder is used for driving the sealing plate to gradually seal the abrasive material inlet channel, and the linear servo electric cylinder is electrically connected with the PLC control system.
Preferably, a first sealing ring and a second sealing ring are arranged between the third flange seat and the connecting piece, the first sealing ring is arranged at an opening of the valve body, into which the connecting piece extends, and the second sealing ring is arranged at the middle position of the connecting piece.
Preferably, a first adjusting pad is arranged between the linear servo electric cylinder and the third flange seat, and the first adjusting pad is used for adjusting the installation position of the linear servo electric cylinder at the third flange seat.
Preferably, the abrasive material entrance cover is equipped with down the sand cover, the terminal surface is contradicted with the closing plate under the sand cover down, be provided with the second adjustment pad down between sand cover and the valve body, the second adjustment pad is used for the mounted position of sand cover in valve body department down.
Preferably, the valve body deviates from the servo electronic jar of orthoscopic one end and is provided with the apron, the apron can be dismantled with the valve body through the installation screw and be connected, the installation is provided with the muffler on the servo electronic jar of orthoscopic.
Preferably, the flow sensor is a media flow sensor.
Compared with the prior art, the invention has the following beneficial effects:
the invention can control whether the pill material in the pressure tank passes through the pneumatic butterfly valve, and a manual stop valve is arranged between the pressure tank and the pill flow valve, thereby being convenient for the overhaul work of the equipment and avoiding discharging all the pill material in the pressure tank when in maintenance.
The flow control valve controls the opening degree of the valve (controls the flow of the shot materials passing through the valve) by arranging the linear servo electric cylinder control connecting piece to move, further drives the closing plate to move, realizes the automatic adjustment of the valve flow by utilizing the PID function of the PLC control system, sets and displays the shot flow required during shot blasting on the configuration software of the industrial personal computer in real time, can conveniently realize the adjustment of the abrasive flow, and has the advantages of high adjustment precision and good reliability.
According to the sand supply system of the sand blasting machine, the American EI 70-24 type sensor is arranged at the lower end of the flow control valve to detect the actual passing flow of the shot materials, the actual passing flow of the shot materials is detected, the measured abrasive flow data is fed back to the PLC control system of the sand blasting machine, the control system controls the opening degree of the flow control valve through the linear servo electric cylinder, and the medium flow sensor has the advantages of high precision and high reliability.
Drawings
FIG. 1 is a schematic illustration of a control valve position according to the present invention;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a cross-sectional view of a third control valve of the present invention;
description of reference numerals: the device comprises a first control valve 1, a blanking barrel 101, a valve structure 102, a rotary control handle 103, a second control valve 2, a third control valve 3, an abrasive inlet 31, a lower sand sleeve 311, an abrasive outlet 32, a valve body 33, a cover plate 331, a flow control structure 34, a linear servo electric cylinder 341, a third flange seat 342, a connecting piece 343, a sealing plate 344, a connecting part 4, a first flange seat 41, a second flange seat 42, a first connecting sleeve 43, a second connecting sleeve 44, a pressure tank 5, a flow sensor 6, a first sealing ring 7, a second sealing ring 8, a first adjusting pad 9, a second adjusting pad 10 and a silencer 11.
Detailed Description
The details of the present invention will be described below with reference to the accompanying drawings and examples.
As shown in fig. 1-3, the present embodiment provides a shot blasting flow control device, which includes a first control valve 1, a second control valve 2, a third control valve 3 and a connecting portion 4, the upper end of the first control valve 1 is connected to the lower end of a pressure tank 5 of a sand blasting system, the lower end of the first control valve 1 is connected to the second control valve 2, the lower end of the second control valve 2 is connected to the third control valve 3, a flow sensor 6 is further disposed on the lower portion of the third control valve 3, the first control valve 1, the second control valve 2 and the third control valve 3 are mounted and connected by the connecting portion 4, the output end of the third control valve 3 is connected to a sand conveying pipe, and the second control valve 2 and the third control valve 3 are electrically connected to an external PLC control system.
Further, first control valve 1 is manual stop valve, manual stop valve includes unloading barrel 101, valve structure 102 and rotary control handle 103, unloading barrel 101 department installation is provided with valve structure 102, valve structure 102 is used for opening or cuts off the inside cavity of unloading barrel 101, unloading barrel 101 outside is provided with rotary control handle 103, rotary control handle 103 output links to each other with valve structure 102, unloading barrel 101 upper end is linked together with overhead tank 5, and unloading barrel 101 lower extreme passes through connecting portion 4 and second control valve 2 links to each other.
Further, in order to realize the connection effect of the first control valve 1, the second control valve 2 and the third control valve 3, the connection portion 4 includes a first flange seat 41, a second flange seat 42, a first connection sleeve 43 and a second connection sleeve 44, the lower end of the blanking cylinder 101 is communicated with the second control valve 2 through the first connection sleeve 43, the first flange seat 41 is sleeved outside the first connection sleeve 43, the first flange seat 41 is fixedly connected with the second control valve 2, the lower end of the second control valve 2 is connected with the third control valve 3 through the second connection sleeve 44, the second flange seat 42 is sleeved outside the second connection sleeve 44, and the second flange seat 42 is fixedly connected with the bottom surface of the second control valve 2.
Further, the second control valve 2 is a pneumatic butterfly valve, and the pneumatic butterfly valve is electrically connected with the PLC control system. The pill in the pressure tank is controlled by the pneumatic butterfly valve to pass or not, and a manual stop valve is arranged between the pressure tank and the pill flow valve, so that the overhaul work of the equipment can be facilitated, and the situation that all pills in the pressure tank need to be discharged completely during maintenance is avoided.
Further, in order to realize that the third control valve can control the abrasive flow, the third control valve 3 includes an abrasive inlet 31, an abrasive outlet 32, a valve body 33 and a flow control structure 34, the upper end of the valve body 33 is provided with the abrasive inlet 31, the abrasive inlet 31 is communicated with the second connecting sleeve 44, the lower end of the valve body 33 is provided with the abrasive outlet 32, the abrasive outlet 32 is provided with a flow sensor 6, the abrasive inlet 31 and the abrasive outlet 32 are communicated with each other in the valve body 33, the lower end outlet of the abrasive inlet 31 is provided with the flow control structure 34, and the flow control structure 34 is used for controlling the size of the opening of the passage at the abrasive inlet 31.
Further, the flow control structure 34 includes a linear servo electric cylinder 341, a third flange seat 342, a connecting member 343 and a sealing plate 344, the linear servo electric cylinder 341 is fixedly connected to one side of the valve body 33 through the third flange seat 342, the connecting member 343 is connected to an output end of the linear servo electric cylinder 341, the connecting member 343 is slidably connected to the valve body 33, the sealing plate 344 is arranged at a position of the connecting member 343 close to the abrasive inlet 31, the linear servo electric cylinder 341 is used for driving the sealing plate 344 to gradually seal the abrasive inlet 31, and the linear servo electric cylinder 341 is electrically connected to the PLC control system.
Further, in order to obtain a better sealing effect, a first sealing ring 7 and a second sealing ring 8 are arranged between the third flange seat 342 and the connecting piece 343, the first sealing ring 7 is arranged at an opening of the valve body 33, into which the connecting piece 343 extends, and the second sealing ring 8 is arranged at a middle position of the connecting piece 343.
Further, in order to adjust the linear servo electric cylinder conveniently, the attachment between the sealing plate and the lower edge of the abrasive inlet can be adjusted to be closer, a first adjusting pad 9 is arranged between the linear servo electric cylinder 341 and the third flange seat 342, and the first adjusting pad 9 is used for adjusting the installation position of the linear servo electric cylinder 341 at the third flange seat 342.
Further, in order to be able to ensure a better contact fit of the abrasive inlet with the closing plate. Abrasive inlet 31 department cover is equipped with sand cover 311 down, the terminal surface is contradicted with closing plate 344 under the sand cover 311 down, be provided with second adjusting pad 10 down between sand cover 311 and the valve body 33, second adjusting pad 10 is used for the mounted position of sand cover 311 in valve body 33 department down.
Further, a cover plate 331 is arranged at one end of the valve body 33, which is away from the linear servo electric cylinder 341, the cover plate 331 is detachably connected with the valve body 33 through a mounting screw, and the linear servo electric cylinder 341 is provided with a silencer 11. The apron can convenient installation dismantle, easy access, maintenance. And the cover plate is provided with a sealing ring structure, so that the sealing property of the valve body is ensured.
Further, the flow sensor 6 is a media flow sensor. The medium flow sensor is a 70-24 type medium flow sensor and can be used for ceramic and glass beads. By adopting a bent beam flow measurement technology, the accuracy is +/-5% of full-size accuracy (standard), the operation is started from a 24-volt direct-current power supply, an output signal is 0-10Vdc, +/-1% accuracy calibration can be selected, and the method is compatible with CE.
The bent beam flow measurement technique provides a simple and highly accurate method of sensing the flow of particulate media that may be falling on the tip of a thin blade. Measuring the displacement provides a direct measure of the flow rate of the medium. The displacement sensor output signal is scaled by 0-10Vdc to represent media traffic flow. Simple connection to windows-based laptops and terminal programs via USB ports and cables would allow selection of single or multi-point (up to 10) calibrations, yielding ± 1% accuracy, with additional advanced calibrations available for applications requiring higher accuracy.
The sand blasting machine equipment adopts an 828D numerical control system of SIEMENS company as a core control unit, can control the action of each system, has multiple functions and wide application range, runs an HMI configuration interface on a 15-inch color touch screen, can monitor, record and store process parameters during numerical control sand blasting, can archive sand blasting data and alarm information, can protect personal safety during normal operation and misoperation of an operator, can ensure automatic shutdown alarm if sand blasting pressure and actual parameters of a working turntable exceed 10 percent of set parameters when the equipment is in action, preliminarily diagnoses fault parts through the HMI interface, displays the alarm information, enables the equipment to have process monitoring and safety interlocking control functions, performs integrated programming control on each unit of the sand blasting system, and performs automatic or manual operation control.
The bottom of the lower pressure container is provided with a pill flow control valve, pills pass through the control valve according to the set flow, and the pills are conveyed to the nozzle by compressed air. The pill conveying system is provided with a pressure gauge for displaying the working pressure, the pressure gauge adopts 1-level precision grade, and the measuring range is 1 MPa. The pressure gauge is placed the position and is convenient for the operator to observe.
The pill in the pressure tank is controlled by the pneumatic butterfly valve to pass or not, and a manual stop valve is arranged between the pressure tank and the pill flow valve, so that the overhaul work of the equipment can be facilitated, and the situation that all pills in the pressure tank need to be discharged completely during maintenance is avoided.
During the shot blasting process, the shots in the pressure tanks are detected by the charge level indicator, the control system controls the opening or closing of each pneumatic pinch valve on the double pressure tanks according to a set program, the shots are controlled to flow into the upper pressure tank and then flow into the lower pressure tank according to the program, and the continuous and uninterrupted work of shot blasting is ensured.
The regulating valve has the characteristics of reliable quality, convenient adjustment, simple maintenance and the like, and the shot blasting equipment is used, stable in flow and high in precision. Can ensure continuous and stable sand production under the pressure of 0.2-0.6Mpa, the sand flow is not less than 2Kg/min, the flow control precision of the full-scale shot is less than or equal to +/-2 percent, and the flow range is as follows: 0 to 10 kg/min.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description of the specification and the description of the attached drawings, the specific connection mode of each part adopts conventional means such as mature bolts, rivets, welding and the like in the prior art, the machines, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, so that the detailed description is omitted.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or through an intermediary, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.
Claims (10)
1. The utility model provides a peening flow control device, its characterized in that includes first control valve, second control valve, third control valve and connecting portion, first control valve upper end links to each other with blowing system pressure tank lower extreme, first control valve lower extreme is connected and is provided with the second control valve, and second control valve lower extreme is connected and is provided with the third control valve, third control valve lower part still is provided with flow sensor, through connecting portion erection joint between first control valve, second control valve and the third control valve, third control valve output links to each other with defeated sand pipe, just second control valve and third control valve are connected with the PLC control system electricity that outside set up.
2. The shot blasting flow control device according to claim 1, wherein the first control valve is a manual stop valve, the manual stop valve comprises a blanking barrel, a valve structure and a rotary control handle, the valve structure is arranged at the blanking barrel and used for opening or blocking an inner cavity of the blanking barrel, the rotary control handle is arranged outside the blanking barrel, an output end of the rotary control handle is connected with the valve structure, an upper end of the blanking barrel is communicated with the pressure tank, and a lower end of the blanking barrel is connected with the second control valve through a connecting part.
3. The shot blasting flow control device according to claim 2, wherein the connecting portion comprises a first flange seat, a second flange seat, a first connecting sleeve and a second connecting sleeve, the lower end of the blanking cylinder body is communicated with the second control valve through the first connecting sleeve, the first connecting sleeve is sleeved with the first flange seat, the first flange seat is fixedly connected with the second control valve, the lower end of the second control valve is connected with the third control valve through the second connecting sleeve, the second connecting sleeve is sleeved with the second flange seat, and the second flange seat is fixedly connected with the bottom surface of the second control valve.
4. The apparatus of claim 1, wherein the second control valve is a pneumatic butterfly valve, and the pneumatic butterfly valve is electrically connected to the PLC control system.
5. The shot blasting flow control device according to claim 3, wherein the third control valve comprises an abrasive inlet, an abrasive outlet, a valve body and a flow control structure, the abrasive inlet is arranged at the upper end of the valve body and is communicated with the second connecting sleeve, the abrasive outlet is arranged at the lower end of the valve body, a flow sensor is arranged at the abrasive outlet and is a medium flow sensor, the abrasive inlet and the abrasive outlet are communicated with each other in the valve body, the flow control structure is arranged at the outlet at the lower end of the abrasive inlet and is used for controlling the size of a channel opening at the abrasive inlet.
6. The shot blasting flow control device according to claim 5, wherein the flow control structure comprises a linear servo electric cylinder, a third flange seat, a connecting piece and a sealing plate, the linear servo electric cylinder is fixedly connected to one side of the valve body through the third flange seat, the connecting piece is connected to the output end of the linear servo electric cylinder, the connecting piece is connected with the valve body in a sliding mode, the sealing plate is arranged on the connecting piece close to the abrasive inlet, the linear servo electric cylinder is used for driving the sealing plate to gradually seal the abrasive inlet channel, and the linear servo electric cylinder is electrically connected with the PLC control system.
7. A shot blasting flow control device according to claim 6, wherein a first seal ring and a second seal ring are provided between the third flange seat and the connecting member, the first seal ring is provided at an opening of the valve body into which the connecting member extends, and the second seal ring is provided at a middle position of the connecting member.
8. The apparatus of claim 6, wherein a first adjustment pad is disposed between the linear servo electric cylinder and the third flange seat, and the first adjustment pad is used for adjusting the mounting position of the linear servo electric cylinder at the third flange seat.
9. A flow control device for shot blasting according to claim 6, wherein a lower sand sleeve is sleeved at the abrasive inlet, the lower end surface of the lower sand sleeve is abutted against the closing plate, and a second adjusting pad is arranged between the lower sand sleeve and the valve body and used for installing the lower sand sleeve at the valve body.
10. The shot blasting flow control device according to claim 5, wherein a cover plate is arranged at one end of the valve body, which is far away from the linear servo electric cylinder, the cover plate is detachably connected with the valve body through a mounting screw, and a silencer is arranged on the linear servo electric cylinder in a mounting mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111392632.3A CN114012612A (en) | 2021-11-23 | 2021-11-23 | Shot blasting flow control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111392632.3A CN114012612A (en) | 2021-11-23 | 2021-11-23 | Shot blasting flow control device |
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| Publication Number | Publication Date |
|---|---|
| CN114012612A true CN114012612A (en) | 2022-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111392632.3A Pending CN114012612A (en) | 2021-11-23 | 2021-11-23 | Shot blasting flow control device |
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| CN (1) | CN114012612A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114750074A (en) * | 2022-04-06 | 2022-07-15 | 昆山安控发展装备有限公司 | Automatic sand blasting equipment of brake block |
-
2021
- 2021-11-23 CN CN202111392632.3A patent/CN114012612A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114750074A (en) * | 2022-04-06 | 2022-07-15 | 昆山安控发展装备有限公司 | Automatic sand blasting equipment of brake block |
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