CN112442579A - Stress relieving equipment for stainless steel - Google Patents
Stress relieving equipment for stainless steel Download PDFInfo
- Publication number
- CN112442579A CN112442579A CN202011220407.7A CN202011220407A CN112442579A CN 112442579 A CN112442579 A CN 112442579A CN 202011220407 A CN202011220407 A CN 202011220407A CN 112442579 A CN112442579 A CN 112442579A
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- Prior art keywords
- stainless steel
- rotating
- compression roller
- rod
- plates
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/52—Methods of heating with flames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Transmission Devices (AREA)
Abstract
The invention relates to the technical field of stainless steel, and discloses stress relieving equipment for stainless steel, which comprises a placing plate, wherein first fixing plates are fixedly arranged at two ends of the top of the placing plate, a bidirectional lead screw is arranged between the two first fixing plates, two ends of the bidirectional lead screw are rotatably connected with the two first fixing plates through first rotating bearings, two symmetrically-arranged first sliding blocks are in threaded connection with the rod wall of the bidirectional lead screw, the bottoms of the two first sliding blocks are in contact connection with the top of the placing plate, vertical plates are fixedly arranged at the tops of the two first sliding blocks, strip-shaped through grooves are formed in the middle positions inside the two vertical plates, the upper ends, close to one side, of the two vertical plates are rotatably connected with first rotating rods through second rotating bearings, and the groove walls of the two strip-shaped through grooves are in contact connection with second rotating rods. The stress relief device for the stainless steel can be used for flattening and relieving the stainless steel bands of gears with different widths.
Description
Technical Field
The invention relates to the technical field of stainless steel, in particular to a stress relieving device for stainless steel.
Background
Stainless steel is short for stainless acid-resistant steel, and steel grade which is resistant to weak corrosive media such as air, steam and water or has stainless property is called stainless steel, generally speaking, the hardness of stainless steel is higher than that of aluminum alloy, and the cost of stainless steel is higher than that of aluminum alloy, so that the stainless steel is used in the existing building and decoration processes.
Wherein patent number is CN209792304U discloses a stainless steel destressing device, the device includes the base, the top of base symmetric welding respectively has two curb plates and two risers, the riser is located between curb plate and the riser, one side welding that two curb plates are close to each other has same bottom plate, interval between combustion head and the stainless steel band can be adjusted to the rotatory handle of accessible, and can flatten the stainless steel band of the curved form of circular arc type, make can effectually get rid of the stress of stainless steel band and flatten the stainless steel band, but the device has certain defect when using:
the device can only convey the stainless steel band with one width size when the stainless steel band is subjected to stress relief and flattening, so that the device brings certain limitation to the stress relief and flattening operation of the stainless steel band.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the stress removing equipment for the stainless steel, which has the advantage that the transverse distance of the device can be freely adjusted according to the width size of the stainless steel band, so that the stainless steel bands of gears with different widths can be flattened and removed, and the problem that the stress removing and flattening operation of the stainless steel band by the device is limited due to the fact that the stainless steel band with one width size can be conveyed in the prior art is solved.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a stress-relieving apparatus for stainless steel comprising a resting plate: the two ends of the top of the placing plate are both fixedly provided with a first fixing plate, a two-way screw rod is arranged between the two first fixing plates, the two ends of the two-way screw rod are rotatably connected with the two first fixing plates through first rotating bearings, the rod wall of the two-way screw rod is in threaded connection with two first sliding blocks which are symmetrically arranged, the bottoms of the two first sliding blocks are in contact connection with the top of the placing plate, the tops of the two first sliding blocks are both fixedly provided with vertical plates, the middle positions inside the two vertical plates are both provided with strip-shaped through grooves, the upper ends of the two vertical plates close to one side are both rotatably connected with first rotating rods through second rotating bearings, the groove walls of the two strip-shaped through grooves are both in contact connection with second rotating rods, the two first rotating rods and the two second rotating rods are respectively and fixedly provided with a first compression roller and a second compression roller close to one side, and a third compression roller is arranged between, the square groove has all been seted up on the right side of first compression roller and third compression roller, the left side of third compression roller and second compression roller is all fixed and is equipped with the square, the cell wall contact of square groove is connected, two the riser is kept away from one side upper end and is all fixed two backup pads that are equipped with the symmetry, two all be provided with first drive mechanism, two between the backup pad the lower extreme of riser all rotates through third rolling bearing and is connected with the sleeve pipe, two be provided with second drive mechanism between the sleeve pipe, it is located two to place its top of board two the fixed two second fixed plates that are equipped with the symmetry in rear side of riser, two be provided with reciprocating motion mechanism, two between the second fixed plate the top of second fixed plate is provided with destressing mechanism.
Preferably, the reciprocating mechanism comprises a reciprocating screw rod, the two ends of the reciprocating screw rod are rotatably connected with the two second fixing plates through fourth rotating bearings, a second slider is connected to the rod wall of the reciprocating screw rod in a threaded manner, the bottom of the second slider is in contact connection with the top of the placing plate, a motor is fixedly arranged on the left side of the second fixing plate, and the output end of the motor penetrates through the second fixing plate and is fixedly connected with the left end of the rod wall of the reciprocating screw rod.
Preferably, the destressing mechanism comprises a transverse plate and a flame gun, the transverse plate is fixedly connected with the top of the second sliding block, the flame gun is fixedly connected with the transverse plate, and an oxygen tube is communicated with the rear side of the flame gun.
Preferably, the first transmission mechanism comprises a screw rod, two ends of the rod wall of the screw rod are rotatably connected with the two support plates through fifth rotating bearings, the rod wall of the screw rod is in threaded connection with a third sliding block, one side, close to the vertical plate, of the third sliding block is rotatably connected with the other end of the second rotating rod through a sixth rotating bearing, and the lower end of the rod wall of the screw rod penetrates through the support plate below and is fixedly provided with a first bevel gear.
Preferably, the second transmission mechanism comprises a telescopic rod and two second bevel gears which are symmetrically arranged, one ends of the two sleeves which are far away from each other penetrate through the vertical plate and extend to the outside, the two second bevel gears are fixedly sleeved with one ends of the two sleeves which are far away from each other, the second bevel gears are meshed with the first bevel gears, the telescopic rod is located between the two sleeves, the telescopic rod is a square telescopic rod, connecting plates are fixedly arranged at two ends of the telescopic rod, and the other sides of the two connecting plates are fixedly connected with one sides of the two sleeves which are close to each other.
Preferably, the two sleeves are fixedly sleeved with a first rotating block at one end close to each other.
Preferably, the right end of the bidirectional screw rod penetrates through the first fixing plate on the right side and is fixedly provided with a second rotating block.
(III) advantageous effects
Compared with the prior art, the invention provides stress relieving equipment for stainless steel, which has the following beneficial effects:
1. this a destressing equipment for stainless steel through what be equipped with places board, first fixed plate, two-way lead screw, slider, first compression roller, second compression roller, third compression roller and first drive mechanism and second drive mechanism, can flatten the stainless steel board of different width dimensions, prevents that the stainless steel from producing and curling.
2. This a destressing equipment for stainless steel through the second fixed plate, reciprocating motion mechanism and the destressing mechanism that are equipped with, carries the stainless steel band and heats the stainless steel band when compressing tightly to the completion is to the inside stress relief of stainless steel.
Drawings
FIG. 1 is a schematic structural view of a stress relieving apparatus for stainless steel according to the present invention;
FIG. 2 is a schematic top view of the structure of FIG. 1;
FIG. 3 is an enlarged view of a portion A of FIG. 1;
fig. 4 is an enlarged view of a portion B of fig. 1.
In the figure: the device comprises a placing plate 1, a first fixing plate 2, a bidirectional screw rod 3, a first sliding block 4, a vertical plate 5, a first rotating rod 6, a second rotating rod 7, a first pressing roller 8, a second pressing roller 9, a third pressing roller 10, a square block 11, a supporting plate 12, a sleeve 13, a second fixing plate 14, a reciprocating screw rod 15, a second sliding block 16, a motor 17, a transverse plate 18, a flame gun 19, an oxygen hose 20, a screw rod 21, a third sliding block 22, a first bevel gear 23, a telescopic rod 24, a second bevel gear 25, a connecting plate 26, a first rotating block 27 and a second rotating block 28.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a destressing apparatus for stainless steel comprises a placing plate 1, wherein first fixing plates 2 are fixedly arranged at both ends of the top of the placing plate 1, a bidirectional screw rod 3 is arranged between the two first fixing plates 2, both ends of the bidirectional screw rod 3 are rotatably connected with the two first fixing plates 2 through first rotating bearings, the rod wall of the bidirectional screw rod 3 is in threaded connection with two first sliding blocks 4 which are symmetrically arranged, the bottoms of the two first sliding blocks 4 are in contact connection with the top of the placing plate 1, so as to limit the transverse movement of the first sliding blocks 4, vertical plates 5 are fixedly arranged at the tops of the two first sliding blocks 4, strip-shaped through grooves are respectively formed at the middle positions inside the two vertical plates 5, the upper ends of the two vertical plates 5, which are close to one side, are rotatably connected with first rotating rods 6 through second rotating bearings, the groove walls of the two strip-shaped through grooves are in contact connection, a first compression roller 8 and a second compression roller 9 are respectively and fixedly arranged on one side of the two first rotating rods 6 close to one side of the two second rotating rods 7, a third compression roller 10 is arranged between the first compression roller 8 and the second compression roller 9, square grooves are respectively arranged on the right sides of the first compression roller 8 and the third compression roller 10, squares 11 are respectively and fixedly arranged on the left sides of the third compression roller 10 and the second compression roller 9, the squares 11 are in contact connection with the groove walls of the square grooves, and through the connection between the squares 11 and the square grooves, the number of the third compression rollers 10 can be added and reduced, so that the flattening width can be adjusted, stainless steel belts with different width sizes can be conveniently flattened, two symmetrical support plates 12 are respectively and fixedly arranged at the upper ends of the sides of the two vertical plates 5 far away from one side, a first transmission mechanism is arranged between the two support plates 12, sleeves 13 are rotatably connected at the lower ends of the two vertical plates 5 through third rotating bearings, and, two symmetrical second fixing plates 14 are fixedly arranged on the top of the placing plate 1 and positioned at the rear sides of the two vertical plates 5, a reciprocating mechanism is arranged between the two second fixing plates 14, and a stress relieving mechanism is arranged above the two second fixing plates 14.
Reciprocating motion mechanism includes reciprocal lead screw 15, the both ends of reciprocal lead screw 15 all rotate with two second fixed plates 14 through fourth rolling bearing and are connected, the pole wall threaded connection of reciprocal lead screw 15 has second slider 16, second slider 16 bottom is connected with the top contact of placing board 1, thereby carry on spacingly to the lateral shifting of second slider 16, the fixed motor 17 that is equipped with in left side of left side second fixed plate 14, the output of motor 17 pass second fixed plate 14 and with the pole wall left end fixed connection of reciprocal lead screw 15.
The stress relieving mechanism comprises a transverse plate 18 and a flame gun 19, the transverse plate 18 is fixedly connected with the top of the second sliding block 16, the flame gun 19 is fixedly connected with the top of the transverse plate 18, and an oxygen tube 20 is communicated with the rear side of the flame gun 19.
First drive mechanism includes lead screw 21, the pole wall both ends of lead screw 21 are all rotated with two backup pads 12 through fifth rolling bearing and are connected, the pole wall threaded connection of lead screw 21 has third slider 22, one side that is close to riser 5 of third slider 22 is rotated through the other end of sixth rolling bearing with second bull stick 7 and is connected, it is spacing to lead to groove and second bull stick 7 to the slip of third slider 22 through the bar, the pole wall lower extreme of lead screw 21 passes below backup pad 12 and fixed first bevel gear 23 that is equipped with.
Second drive mechanism includes the second bevel gear 25 that telescopic link 24 and two symmetries set up, the one end that two sleeve pipes 13 kept away from mutually all passes riser 5 and extends to the outside, two second bevel gears 25 are kept away from one end fixed cup joint with two sleeve pipes 13 respectively mutually, second bevel gear 25 and first bevel gear 23 meshing, telescopic link 24 is located between two sleeve pipes 13, telescopic link 24 is square telescopic link, and both ends are all fixed and are equipped with connecting plate 26, adopt square telescopic link can make telescopic link 24 rotate the transmission, the opposite side and two sleeve pipes 13 of two connecting plates 26 are close to one side fixed connection mutually.
The two sleeves 13 are fixedly sleeved with a first rotating block 27 at one end close to each other, the right end of the bidirectional screw rod 3 penetrates through the first right fixing plate 2 and is fixedly provided with a second rotating block 28, and the sleeves 13 and the bidirectional screw rod 3 can be conveniently rotated by arranging the first rotating block 27 and the second rotating block 28.
In conclusion, when the stress relieving device for stainless steel is used, the second rotating block 28 is firstly rotated according to the width of the stainless steel belt, so that the bidirectional screw rod 3 rotates, the two first sliding blocks 4 of the rod wall of the bidirectional screw rod 3 relatively slide while the bidirectional screw rod 3 rotates, so that the two vertical plates 5 move, the telescopic rod 24 stretches while the two vertical plates 5 move, so that the number of the third press rollers 10 is added and reduced according to the width of the stainless steel belt, the stainless steel belt can be covered by the first press roller 8, the second press roller 9 and the third press roller 10, then the stainless steel belt passes through the space between the upper third press roller 10 and the lower third press roller 10, then the first rotating block 27 is rotated, so that the sleeve 13 rotates, the sleeve 13 and the second bevel gear 25 simultaneously rotate through the transmission of the telescopic rod 24 while the sleeve 13 rotates, and therefore the second bevel gear 25 is simultaneously in meshing transmission with the first bevel gear 23, make two lead screws 21 rotate, the third slider 22 shifts up when two lead screws 21 pivoted, thereby drive the first compression roller 8 of below, the bottom contact of second compression roller 9 and third compression roller 10 and stainless steel band, thereby can flatten its surface when stainless steel band twitches, prevent to curl, starter motor 17 afterwards and communicate oxygen hose 20 and outside oxygen equipment, open flame projecting gun 19 and carry out the flame projecting immediately, reciprocal lead screw 15 rotates simultaneously and drives second slider 16 and diaphragm 18 and flame projecting gun 19 reciprocating motion, heat the stainless steel in the stainless steel band transmission course, thereby eliminate the stress inside the stainless steel.
It is to be noted that the term "comprises," "comprising," or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A stress-relieving device for stainless steel, comprising a resting plate (1), characterized in that: the two ends of the top of the placing plate (1) are respectively fixedly provided with a first fixing plate (2), a two-way lead screw (3) is arranged between the two first fixing plates (2), the two ends of the two-way lead screw (3) are respectively rotatably connected with the two first fixing plates (2) through first rotating bearings, the rod wall of the two-way lead screw (3) is in threaded connection with two first sliding blocks (4) which are symmetrically arranged, the bottoms of the two first sliding blocks (4) are respectively in contact connection with the top of the placing plate (1), the tops of the two first sliding blocks (4) are respectively fixedly provided with a vertical plate (5), the middle positions in the two vertical plates (5) are respectively provided with a strip-shaped through groove, the upper ends of the two vertical plates (5) close to one side are respectively rotatably connected with a first rotating rod (6) through second rotating bearings, and the groove walls of the two strip-shaped through grooves are respectively in contact connection, two first rotating rods (6) and two second rotating rods (7) are close to one side and are respectively fixedly provided with a first compression roller (8) and a second compression roller (9), a third compression roller (10) is arranged between the first compression roller (8) and the second compression roller (9), the right sides of the first compression roller (8) and the third compression roller (10) are respectively provided with a square groove, the left sides of the third compression roller (10) and the second compression roller (9) are respectively and fixedly provided with a square block (11), the square block (11) is in contact connection with the groove wall of the square groove, the upper ends of the two far sides of the two risers (5) are respectively and fixedly provided with two symmetrical support plates (12), a first transmission mechanism is arranged between the two support plates (12), the lower ends of the two risers (5) are respectively and rotatably connected with a sleeve (13) through a third rotating bearing, and a second transmission mechanism is arranged between the two sleeve (13), two symmetrical second fixing plates (14) are fixedly arranged on the top of the placing plate (1) and positioned at the rear sides of the two vertical plates (5), a reciprocating moving mechanism is arranged between the two second fixing plates (14), and a stress relieving mechanism is arranged above the two second fixing plates (14).
2. A stress relieving apparatus for stainless steel according to claim 1, wherein: reciprocating motion mechanism is including reciprocal lead screw (15), the both ends of reciprocal lead screw (15) are all through fourth rolling bearing and two second fixed plate (14) rotate to be connected, the pole wall threaded connection of reciprocal lead screw (15) has second slider (16), second slider (16) bottom is connected with the top contact of placing board (1), the left side the fixed motor (17) that is equipped with in left side of second fixed plate (14), the output of motor (17) pass second fixed plate (14) and with the pole wall left end fixed connection of reciprocal lead screw (15).
3. A stress relieving apparatus for stainless steel according to claim 1, wherein: destressing mechanism includes diaphragm (18) and flame gun (19), the top fixed connection with second slider (16) of diaphragm (18), flame gun (19) and the top fixed connection of diaphragm (18), the rear side intercommunication of flame gun (19) is equipped with oxygen hose (20).
4. A stress relieving apparatus for stainless steel according to claim 1, wherein: the first transmission mechanism comprises a screw rod (21), two ends of the rod wall of the screw rod (21) are rotatably connected with the two support plates (12) through fifth rotating bearings, the rod wall of the screw rod (21) is in threaded connection with a third sliding block (22), one side, close to the vertical plate (5), of the third sliding block (22) is rotatably connected with the other end of the second rotating rod (7) through a sixth rotating bearing, and the lower end of the rod wall of the screw rod (21) penetrates through the lower portion of the support plates (12) and is fixedly provided with a first bevel gear (23).
5. A stress relieving apparatus for stainless steel according to claim 1, wherein: the second transmission mechanism comprises a telescopic rod (24) and two second bevel gears (25) which are symmetrically arranged, wherein one ends, far away from the sleeve pipes (13), of the two second bevel gears (25) penetrate through the vertical plates (5) and extend to the outside, the two second bevel gears (25) are respectively fixedly sleeved with the two ends, far away from the sleeve pipes (13), the second bevel gears (25) are meshed with the first bevel gears (23), the telescopic rod (24) is located between the two sleeve pipes (13), the telescopic rod (24) is a square telescopic rod, connecting plates (26) are fixedly arranged at two ends of the telescopic rod, and the other side of the connecting plate (26) is fixedly connected with the two sleeve pipes (13) close to one side.
6. A stress relieving apparatus for stainless steel according to claim 1, wherein: and one ends of the two sleeves (13) close to each other are fixedly sleeved with first rotating blocks (27).
7. A stress relieving apparatus for stainless steel according to claim 1, wherein: the right end of the bidirectional screw rod (3) penetrates through the first fixing plate (2) on the right side and is fixedly provided with a second rotating block (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011220407.7A CN112442579A (en) | 2020-11-05 | 2020-11-05 | Stress relieving equipment for stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011220407.7A CN112442579A (en) | 2020-11-05 | 2020-11-05 | Stress relieving equipment for stainless steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112442579A true CN112442579A (en) | 2021-03-05 |
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ID=74735692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011220407.7A Withdrawn CN112442579A (en) | 2020-11-05 | 2020-11-05 | Stress relieving equipment for stainless steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112442579A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204523879U (en) * | 2015-04-12 | 2015-08-05 | 潘小玲 | A kind of novel width-adjustable veneer reeling machine |
| CN209792304U (en) * | 2019-10-25 | 2019-12-17 | 昆山胜力鸿五金机械有限公司 | stainless steel destressing device |
| CN110587399A (en) * | 2019-10-23 | 2019-12-20 | 荆门正源光华管业有限公司 | Excircle grinding device is used in production of epoxy ceramic pipe |
| CN209838833U (en) * | 2019-05-08 | 2019-12-24 | 常州雕匠液压科技有限公司 | Support frame for hydraulic cylinder |
-
2020
- 2020-11-05 CN CN202011220407.7A patent/CN112442579A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204523879U (en) * | 2015-04-12 | 2015-08-05 | 潘小玲 | A kind of novel width-adjustable veneer reeling machine |
| CN209838833U (en) * | 2019-05-08 | 2019-12-24 | 常州雕匠液压科技有限公司 | Support frame for hydraulic cylinder |
| CN110587399A (en) * | 2019-10-23 | 2019-12-20 | 荆门正源光华管业有限公司 | Excircle grinding device is used in production of epoxy ceramic pipe |
| CN209792304U (en) * | 2019-10-25 | 2019-12-17 | 昆山胜力鸿五金机械有限公司 | stainless steel destressing device |
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Application publication date: 20210305 |