CN111975036A - Steel structure connecting piece system of processing - Google Patents
Steel structure connecting piece system of processing Download PDFInfo
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- CN111975036A CN111975036A CN202010862698.3A CN202010862698A CN111975036A CN 111975036 A CN111975036 A CN 111975036A CN 202010862698 A CN202010862698 A CN 202010862698A CN 111975036 A CN111975036 A CN 111975036A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B47/00—Constructional features of components specially designed for boring or drilling machines; Accessories therefor
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Abstract
The invention relates to a steel structure connecting piece processing system which comprises a working base, a working table, a lead screw, a gantry support, a drilling mechanism and a limiting mechanism, wherein wedge-shaped grooves are symmetrically distributed on the upper end face of the working base, the working table is positioned above the working base and is connected with the wedge-shaped grooves of the working base through wedge-shaped sliding blocks, the wedge-shaped sliding blocks are matched with the wedge-shaped grooves, so that the working table cannot shake when moving, the limiting mechanisms are symmetrically arranged on the left side and the right side of the upper end of the working table, the middle part of the lead screw is connected with the working table in a thread matching mode, the gantry support is positioned above the working base, the lower end of the gantry support is connected with the side face of the lower end of the working base. The invention can solve the problems existing in the prior processing of the steel structure connecting piece that: the device structure is fast for the steel construction processing, is difficult for the dismouting and adjusts size, operation complicacy, consuming time power, stability is not good when punching, increased the cost of labor, drilling inefficiency scheduling problem.
Description
Technical Field
The invention relates to the technical field of steel structure processing, in particular to a processing system of a steel structure connecting piece.
Background
The steel structure is a basic component made of section steel or steel plates, and a bearing mechanism is formed according to a certain rule by welding or bolt connection and other methods according to the use requirements, and the application of the steel structure in various engineering constructions is very wide, such as steel bridges, steel plants, steel gates, various large pipeline containers, high-rise buildings, tower rail mechanisms and the like.
In order to improve the packaging efficiency of steel construction, accelerate building efficiency, steel structure skeleton among the prior art punches in the mill usually, bend and after surface treatment, directly transport to the building site and assemble, current steel construction is device structure rigid plate for processing, difficult dismouting and regulation size, the operation is complicated, consuming time power, stability is not good when punching, the cost of labor has been increased, how to make the structure of steel construction processing device nimble easily adjust, the dismouting is simple and convenient and easy labour saving and time saving of operation, be the problem that this technical field technical staff remained the solution.
Disclosure of Invention
In order to solve the problems, the invention provides a steel structure connecting piece processing system which comprises a working base, a working table, a screw rod, a gantry support, a drilling mechanism and a limiting mechanism, wherein wedge-shaped grooves are symmetrically distributed on the upper end surface of the working base, the working table is positioned above the working base and is connected with the wedge-shaped grooves of the working base through wedge-shaped sliding blocks, the wedge-shaped sliding blocks are matched with the wedge-shaped grooves, so that the working table cannot shake when moving, the limiting mechanisms are symmetrically arranged on the left side and the right side of the upper end of the working table, the middle part of the screw rod is connected with the working table in a thread matching mode, the gantry support is positioned above the working base, the lower end of the gantry support is connected with the side surface of the lower end of the working base, the front end of the gantry support is connected with the drilling mechanism through a movable, efficiency when increasing drilling, many hollow square pipes have been put to the centre of during operation workstation, carry out spacing chucking to them through drilling mechanism, control drilling mechanism by the movable support of gantry support front end and punch to suitable position after that to make can punch to many hollow square pipes by quick accuracy.
The lead screw rear end be connected with the rocker, the lead screw front end is connected with lead screw fishplate bar through the bearing, lead screw fishplate bar is connected in the work base upper end, firm extension board is installed at the rear of workstation up end, the lead screw passes firm extension board, drives the lead screw through rotating the rocker and rotates to make the workstation remove in the front and back direction, fixed extension board then ensures that the lead screw can not take place to rock when rotating.
The drilling machine is characterized in that electric sliders are arranged at the upper front ends of the cross beams of the gantry support and connected with the rear end face of the movable support, and the electric sliders control the position of the movable support so as to control the left position and the right position of the drilling mechanism and enable the drilling mechanism to rapidly move to the position, needing to be drilled, of the hollow square pipe.
Drilling mechanism include the pneumatic cylinder, including a motor, an end cap, a controller, and a cover plate, the rotary drum, drill bit and connection box, the connection box is rear end confined frame structure, connection box upper end inside wall is connected with the pneumatic cylinder, the pneumatic cylinder lower extreme has the motor through motor base installation, motor output shaft has the rotary drum, the rotary drum passes the lower lateral wall of connection box, the rotary drum lower extreme is connected with the drill bit through the grafting mode, drilling mechanism can punch to hollow side's pipe on the workstation, the during operation pneumatic cylinder drives the rotary drum down, the motor drives the rotary drum and rotates, the drill bit of pegging graft on the rotary.
The limiting mechanism comprises a limiting block, a limiting fixed plate, a limiting movable plate, a limiting connecting block, a limiting bolt and a limiting column, the limiting fixed plate is arranged at the upper end of the workbench, the limiting movable plate is positioned at the inner side of the limiting fixed plate, the inner side of the limiting bolt is connected to the limiting movable plate through a bearing, the middle part of the limiting bolt is connected with the limiting bottom plate in a thread fit mode, the limiting columns are symmetrically arranged at the front and back of the limiting bolt, the middle part of each limiting column penetrates through the limiting fixed plate, the inner side of each limiting column is connected to the limiting movable plate, the limiting blocks are uniformly arranged at the inner side of the limiting movable plate along the front and back direction and are connected with the limiting movable plate through the limiting connecting block, and a plurality of limiting blocks are arranged on the limiting mechanism, so that the, therefore, the limiting blocks on the limiting moving plate are clamped into the two ends of the hollow square tube, the limiting effect on the hollow square tube is achieved, and the limiting columns can prevent the limiting bolts from shaking during punching.
As a preferred technical scheme of the invention, the upper end of the gantry support beam is provided with a dovetail groove, a matched dovetail-shaped sliding block is arranged in the dovetail groove, the dovetail-shaped sliding block is connected with the rear side surface of the movable support through an L-shaped rod, and the dovetail-shaped sliding block can increase the stability of the drilling mechanism during movement in a mode of being matched with the dovetail groove.
According to the preferable technical scheme, the outer side wall of the rotary drum is provided with the drilling limiting plate, the left side wall and the right side wall of the drilling limiting plate are symmetrically provided with the rectangular sliding blocks matched with the rectangular sliding grooves in the inner side wall of the connecting frame, and the drilling limiting plate can effectively prevent the rotary drum from shaking during rotation.
As a preferable technical scheme, the inner side surface of the drilling limiting plate is uniformly provided with first balls along the circumferential direction. When the rotary drum rotated, first ball had reduced the friction between drilling limiting plate and the rotary drum, had effectively protected drilling limiting plate and rotary drum.
According to a preferable technical scheme, a limiting ring is arranged above the drilling limiting plate, the limiting ring is installed on the outer side wall of the rotary drum, second balls are uniformly arranged on the lower side surface of the limiting ring in the circumferential direction, the limiting ring is matched with the drilling limiting plate in position to achieve the effect of controlling the drilling depth, the position of the drilling limiting plate is adjusted, the purpose of controlling the position of a drill bit is achieved through the matching of the drilling limiting plate and the limiting ring, and the device can drill at a proper position during working.
According to a preferable technical scheme, the front end of the drilling limiting plate is provided with an adjusting convex plate, the adjusting convex plate is connected with the middle of a bolt in a threaded fit mode, the bottom of the bolt is connected with a fixed cross rod bearing, the fixed cross rod is connected between the inner side walls of a connecting frame, the position of the drilling limiting plate can be adjusted by screwing the bolt, the effect of controlling the drilling depth is achieved by matching the drilling limiting plate with the position of a limiting ring, and the rectangular sliding block on the drilling limiting plate can be moved by screwing the bolt on the adjusting convex plate, so that the drilling limiting plate reaches the required position.
As a preferred technical scheme of the invention, the limiting block is of an isosceles trapezoid structure, the front surface and the rear surface of the limiting block are respectively provided with an inclined surface, the isosceles trapezoid structure enables the workbench to work with various steel structures, the isosceles trapezoid structure also enhances the stability when clamping workpieces, the isosceles trapezoid structure enables the workbench to work with various steel structures, and the isosceles trapezoid structure also enhances the stability when clamping hollow square tubes.
According to the preferable technical scheme, the inner side face of the limiting block is connected with a limiting transverse plate, the middle of the sliding column penetrates through the limiting transverse plate, the lower end of the sliding column is connected with a roller plate, rollers are connected below the roller plate, springs are arranged on the outer side wall of the sliding column, the springs are connected between the roller plate and the limiting transverse plate, the rollers are clamped between steel structure workpieces through inertia, the springs shrink, shaking of the steel structure workpieces during working operation is limited and prevented, stability is improved, when the hollow square tube needs to be locked, the limiting bolt is screwed to drive the limiting block to move, and before the limiting block is matched with the hollow square, the rollers are downwards extruded under the action of the springs, so that the hollow square is prevented from having a gap on a workbench, and drilling effect.
The invention has the beneficial effects that:
the steel structure connecting piece is flexible to process and easy to adjust by adopting the matching arrangement of the electric push rod, the gantry support and the moving support.
The limiting block is of an isosceles trapezoid structure, so that the steel structure connecting piece machining system can adapt to the sizes of various section steels or steel plates and can prevent left and right shaking;
and the outer side wall of the drilling mechanism is provided with a drilling limiting plate, the position of the drilling limiting plate is adjusted through a bolt at the front end of the drilling limiting plate, and a limiting ring on the rotary drum is matched with the drilling limiting plate, so that the effect of controlling the drilling depth of a drill bit is achieved, and the stability of the drilling mechanism during drilling is enhanced.
And fourthly, the drilling limiting plate and the limiting ring of the drilling mechanism both adopt ball structures, so that the friction between the lower bottom surface of the limiting ring and the inner side wall of the drilling limiting plate during working is reduced, and the damage of machine parts caused by the friction during working is effectively prevented.
Drawings
The present invention will be further described with reference to the accompanying drawings and examples.
FIG. 1 is a schematic view of a first configuration of the present invention;
FIG. 2 is a second schematic structural view of the present invention;
FIG. 3 is an enlarged view of the spacing mechanism of the present invention;
fig. 4 is a partial cross-sectional view of the drilling mechanism of the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
As shown in the figure, a steel structure connecting piece processing system comprises a working base 1, a working table 2, a screw rod 3, a gantry support 4, a drilling mechanism 5 and a limiting mechanism 6, wherein wedge-shaped grooves 11 are symmetrically distributed on the upper end surface of the working base 1, the working table 2 is positioned above the working base 1, the working table 2 is connected with the wedge-shaped grooves 11 of the working base 1 through wedge-shaped sliders 21, the wedge-shaped sliders 21 are matched with the wedge-shaped grooves 11, so that the working table cannot shake during moving, the limiting mechanisms 6 are symmetrically arranged on the left side and the right side of the upper end of the working table 2, the middle part of the screw rod 3 is connected with the working table 2 in a thread fit mode, the gantry support 4 is positioned above the working base 1, the lower end of the gantry support 4 is connected with the side surface of the lower end of the working base 1, the front end of the gantry support, the drilling machine can punch a plurality of hollow square pipes at one time, the drilling efficiency is improved, the plurality of hollow square pipes are placed in the middle of the workbench 2 during working, the hollow square pipes are limited and clamped through the drilling mechanism 5, and then the drilling mechanism 5 is controlled to punch at a proper position by the movable support 41 at the front end of the gantry support 4, so that the drilling mechanism can fast and accurately punch the plurality of hollow square pipes.
3 rear ends of lead screw be connected with rocker 31, the lead screw 3 front end is connected with screw fishplate bar 32 through the bearing, screw fishplate bar 32 is connected in work base 1 upper end, firm extension board 33 is installed to the rear of 2 up end of workstation, lead screw 3 passes firm extension board 33, drives the lead screw through rotating rocker 31 and rotates to make workstation 2 remove in the front and back direction, firm extension board 33 then ensures that the lead screw can not take place to rock when rotating.
The upper front end of the beam of the gantry support 4 is provided with an electric slider 42, the electric slider 42 is connected with the rear end face of the movable support 41, and the electric slider 42 controls the left and right positions of the drilling mechanism 5 by controlling the position of the movable support 41 so as to be capable of rapidly moving to the position of the hollow square pipe to be drilled.
The upper end of the transverse beam of the gantry support 4 is provided with a dovetail groove 43, a matched dovetail slide block 44 is arranged in the dovetail groove 43, the dovetail slide block 44 is connected with the rear side face of the movable support 41 through an L-shaped rod, and the dovetail slide block 44 is matched with the dovetail groove 43, so that the stability of the drilling mechanism 5 during movement can be improved.
The limiting mechanism 6 comprises a limiting block 61, a limiting fixed plate 62, a limiting moving plate 63, a limiting connecting block 64, a limiting bolt 65 and a limiting column 66, the limiting fixed plate 62 is arranged at the upper end of the workbench 2, the limiting moving plate 63 is positioned at the inner side of the limiting fixed plate 62, the inner side of the limiting bolt 65 is connected to the limiting moving plate 63 through a bearing, the middle part of the limiting bolt 65 is connected with the limiting bottom plate 62 in a threaded fit manner, the limiting columns 66 are symmetrically arranged in the front and back of the limiting bolt 65, the middle part of the limiting column 66 penetrates through the limiting fixed plate 62, the inner side of the limiting column 66 is connected to the limiting moving plate 63, the limiting blocks 61 are uniformly arranged at the inner side of the limiting moving plate 63 along the front and back direction, the limiting blocks 61 are connected with the limiting moving plate 62 through the, when the hollow square tube is placed on the workbench 2, the limiting moving plate is moved by screwing the limiting bolt 65, so that the limiting blocks 61 on the limiting moving plate are clamped into the two ends of the hollow square tube, the limiting effect on the hollow square tube is achieved, and the limiting columns 66 can prevent the limiting bolts from shaking during punching.
Stopper 61 be isosceles trapezoid structure, stopper 61 all sets up to the inclined plane the front and back, isosceles trapezoid structure makes workstation 2 can work multiple shaped steel structure, isosceles trapezoid structure has also increased the stability of blocking hollow square pipe.
The inner side surface of the limiting block (61) is connected with a limiting transverse plate (611), the middle of the sliding column 612 penetrates through the limiting transverse plate 611, the lower end of the sliding column 612 is connected with a roller plate 613, a roller 614 is connected below the roller plate 613, springs 615 are arranged on the outer side wall of the sliding column 612, the springs 615 are connected between the roller plate 613 and the limiting transverse plate 611, when the hollow square tube needs to be locked, the limiting bolt 65 is screwed to drive the limiting block 61 to move, before the limiting block 61 is matched with the hollow square, the roller 614 is downwards extruded under the action of the springs 615, and the hollow square is prevented from having a gap on the workbench 2, so that the drilling effect is poor.
The outer side wall of the rotary drum 53 is provided with a drilling limiting plate 531, the left side wall and the right side wall of the drilling limiting plate 531 are symmetrically provided with rectangular sliders 533 matched with the rectangular chutes 532 on the inner side wall of the connecting frame 55, and the drilling limiting plate 531 can effectively prevent the rotary drum 53 from shaking when rotating.
The inner side surface of the drilling limiting plate 531 is uniformly provided with first balls 534 along the circumferential direction, and when the rotary drum 53 rotates, the first balls 534 reduce friction between the drilling limiting plate 531 and the rotary drum 53, so that the drilling limiting plate 531 and the rotary drum 53 are effectively protected.
The front end of drilling limiting plate 531 install one and adjust flange 537, adjust between flange 537 and the bolt 538 middle part and be connected through screw-thread fit's mode, bolt 538 bottom and fixed horizontal pole 539 bearing connection, fixed horizontal pole 539 is connected between the linking frame 55 inside wall, can remove the rectangle slider 533 on the drilling limiting plate 531 through twisting the bolt 538 of adjusting flange 537 for drilling limiting plate 531 reachs required position.
The top of drilling limiting plate 531 be provided with spacing ring 535, spacing ring 535 is installed on the rotary drum 53 lateral wall, the downside of week direction is evenly provided with second ball 536 along spacing ring 535, adjusts the position of drilling limiting plate 531, cooperatees with spacing ring 535 through drilling limiting plate 531, reaches the purpose of control drill bit 54 position for steel construction connecting piece device can drill at suitable position at the during operation.
During operation, place hollow square pipe in the middle of the workstation earlier, move spacing movable plate through twisting spacing bolt removal, stopper on the spacing movable plate presses close to can press from both sides tight hollow square pipe, the gyro wheel can be down pressed hollow square pipe under the spring action this moment, make hollow square pipe paste on the workstation, it drives the lead screw rotation to rotate the rocker, make the workstation remove suitable position, the electronic slider of gantry support drives drilling mechanism and removes after that, it drives drilling movable plate and removes to twist the bolt that moves drilling mechanism, thereby control the drill bit through the spacing ring cooperation with the rotary drum outer wall and reach suitable drilling position, drilling mechanism during operation pneumatic cylinder gives a holding down force of rotary drum, the motor drives the rotary drum and rotates, thereby make the drill bit of pegging graft on the rotary drum carry out employment work.
The steel structure connecting piece is flexibly processed and operated and is easy to adjust by adopting the matching arrangement of the electric push rod, the gantry support and the moving support.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides a steel construction connecting piece system of processing, includes work base (1), workstation (2), lead screw (3), gantry support (4), drilling mechanism (5) and stop gear (6), its characterized in that: wedge-shaped grooves (11) are symmetrically distributed on the upper end face of the working base (1), the workbench (2) is located above the working base (1), the workbench (2) is connected with the wedge-shaped grooves (11) of the working base (1) through wedge-shaped sliding blocks (21), limiting mechanisms (6) are symmetrically mounted on the left side and the right side of the upper end of the workbench (2), the middle of the lead screw (3) is connected with the workbench (2) in a thread fit mode, the gantry support (4) is located above the working base (1), the lower end of the gantry support (4) is connected with the side face of the lower end of the working base (1), the front end of the gantry support (4) is connected with the drilling mechanism (5) through a movable support (41), and the movable support (41) is L-shaped; wherein:
the rear end of the screw rod (3) is connected with a rocker (31), the front end of the screw rod (3) is connected with a screw rod shaft connecting plate (32) through a bearing, the screw rod shaft connecting plate (32) is connected to the upper end of the working base (1), a stabilizing support plate (33) is installed behind the upper end face of the working table (2), and the screw rod (3) penetrates through the stabilizing support plate (33);
the upper front end of the beam of the gantry support (4) is provided with an electric slider (42), and the electric slider (42) is connected with the rear end face of the movable support (41);
the drilling mechanism (5) comprises a hydraulic cylinder (51), a motor (52), a rotary cylinder (53), a drill bit (54) and a connecting frame (55), the connecting frame (55) is of a frame-shaped structure with a closed rear end, the inner side wall of the upper end of the connecting frame (55) is connected with the hydraulic cylinder (51), the motor (52) is installed at the lower end of the hydraulic cylinder (51) through a motor base, an output shaft of the motor (52) is connected with the rotary cylinder (53), the rotary cylinder (53) penetrates through the lower side wall of the connecting frame (55), and the lower end of the rotary cylinder (53) is connected with the drill bit;
the limiting mechanism (6) comprises a limiting block (61), a limiting fixed plate (62), a limiting moving plate (63), a limiting connecting block (64), a limiting bolt (65) and a limiting column (66), spacing fixed plate (62) are installed in workstation (2) upper end, spacing movable plate (63) are located spacing fixed plate (62) inboard, spacing bolt (65) inboard is connected on spacing movable plate (63) through the bearing, adopt screw-thread fit's mode to be connected between spacing bolt (65) middle part and spacing bottom plate (62), spacing post (66) of having arranged around spacing bolt (65) symmetry, spacing fixed plate (62) are passed at spacing post (66) middle part, spacing post (66) inboard is connected on spacing movable plate (63), spacing block (61) have evenly been arranged along the fore-and-aft direction to spacing movable plate (63) inboard, spacing block (61) are connected with spacing movable plate (62) through spacing connecting block (64).
2. The steel structural connector machining system of claim 1, wherein: a dovetail groove (43) is formed in the upper end of a cross beam of the gantry support (4), a matched dovetail-shaped sliding block (44) is arranged in the dovetail groove (43), and the dovetail-shaped sliding block (44) is connected with the rear side face of the movable support (41) through an L-shaped rod.
3. The steel structure connection processing device of claim 1, wherein: the outer side wall of the rotary drum (53) is provided with a drilling limiting plate (531), and the left side wall and the right side wall of the drilling limiting plate (531) are symmetrically provided with rectangular sliding blocks (533) matched with rectangular sliding grooves (532) in the inner side wall of the connecting frame (55).
4. The steel structure connection processing device of claim 3, wherein: the inner side surface of the drilling limiting plate (531) is uniformly provided with first balls (534) along the circumferential direction.
5. The steel structural connector machining system of claim 3, wherein: drilling limiting plate (531) top be provided with spacing ring (535), spacing ring (535) are installed on rotary drum (53) lateral wall, spacing ring (535) evenly are provided with second ball (536) along the week direction downside.
6. The steel structural connector machining system of claim 3, wherein: the front end of drilling limiting plate (531) install one and adjust flange (537), adjust between flange (537) and bolt (538) the middle part be connected through screw-thread fit's mode, bolt (538) bottom is connected with fixed horizontal pole (539) bearing, fixed horizontal pole (539) are connected between linking frame (55) inside wall.
7. The steel structural connector machining system of claim 1, wherein: the limiting blocks (61) are of isosceles trapezoid structures, and the front and rear surfaces of the limiting blocks (61) are all provided with inclined surfaces.
8. The steel structural connector machining system of claim 1, wherein: the inner side surface of the limiting block (61) is connected with a limiting transverse plate (611), the middle of the sliding column (612) penetrates through the limiting transverse plate (611), the lower end of the sliding column (612) is connected with a roller plate (613), rollers (614) are connected below the roller plate (613), springs (615) are arranged on the outer side wall of the sliding column (612), and the springs (615) are connected between the roller plate (613) and the limiting transverse plate (611).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010862698.3A CN111975036A (en) | 2020-08-25 | 2020-08-25 | Steel structure connecting piece system of processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010862698.3A CN111975036A (en) | 2020-08-25 | 2020-08-25 | Steel structure connecting piece system of processing |
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| Publication Number | Publication Date |
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| CN111975036A true CN111975036A (en) | 2020-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010862698.3A Withdrawn CN111975036A (en) | 2020-08-25 | 2020-08-25 | Steel structure connecting piece system of processing |
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| CN (1) | CN111975036A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112976175A (en) * | 2021-02-23 | 2021-06-18 | 朱翠华 | Manufacturing and processing method of energy-saving sound-absorbing integrated wallboard |
-
2020
- 2020-08-25 CN CN202010862698.3A patent/CN111975036A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112976175A (en) * | 2021-02-23 | 2021-06-18 | 朱翠华 | Manufacturing and processing method of energy-saving sound-absorbing integrated wallboard |
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Application publication date: 20201124 |
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