CN111940635A - Wire cutting device for nut - Google Patents
Wire cutting device for nut Download PDFInfo
- Publication number
- CN111940635A CN111940635A CN202010681205.6A CN202010681205A CN111940635A CN 111940635 A CN111940635 A CN 111940635A CN 202010681205 A CN202010681205 A CN 202010681205A CN 111940635 A CN111940635 A CN 111940635A
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- fixed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F1/00—Bending wire other than coiling; Straightening wire
- B21F1/008—Bending wire other than coiling; Straightening wire in 3D with means to rotate the wire about its axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F11/00—Cutting wire
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F23/00—Feeding wire in wire-working machines or apparatus
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- Mechanical Engineering (AREA)
- Wire Processing (AREA)
Abstract
The invention discloses a wire cutting device for a nut, which comprises an unreeling unit, a leading-in unit, a bending unit, a cutting unit and a controller which are sequentially arranged from left to right, wherein the unreeling unit comprises a rotating seat, a rotating frame and a braking assembly, the braking assembly comprises a vertical braking rod and a friction pad, the vertical braking rod comprises a vertical rod body and a vertical friction ball, a frame cylinder for driving a rotating shaft to move up and down so as to drive the vertical friction ball to be attached to or away from the friction pad is also arranged in the rotating seat, the bending unit comprises a bending device and a frame, a plurality of bending devices are arranged on the front side and the rear side of the top surface of the frame in a staggered manner, each bending device comprises a wheel cylinder, a rotating wheel and a wheel frame, the wheel cylinder drives the rotating wheel to move back and forth through the wheel frame, the cutting unit comprises a pressing head, a cutting knife and a machine, the later stage of being convenient for is once cut and is formed the multistage wire rod section, effectively improves work efficiency.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of nuts, in particular to the technical field of a wire cutting device for nuts.
[ background of the invention ]
Nuts, i.e., screw caps, are parts that are screwed together with bolts or screws to perform a fastening function, and are classified into carbon steel, stainless steel, nonferrous metals, and the like according to the material. The preparation process of the nut mainly comprises pickling, drawing, forming, tapping and surface treatment. Wherein, the raw material wire rod for preparing the nut is discharged through the unwinding device. The traditional unreeling device comprises a base, a rotating shaft arranged on the base and a cylindrical tray frame surrounded by a fixing plate. Unwinding device among the prior art does not generally set up braking component, because unwinding device is longer by the time of rotation to stopping at the blowing in-process, and unwinding device is used for placing the diameter of the plate rail of coil and is fixed, when the coil internal diameter of coiling on the plate rail is bigger than normal, can squint on unwinding device, lead to the coil to unwind or excessively release, and the condition that several circles of wire rod deviate from unwinding device top simultaneously often appears, bring inconvenience for the staff a lot, thereby the normal operating of production has been influenced, production efficiency has been reduced. In addition, after the raw material wire rod for preparing the nut is paid off, a worker needs to manually cut the raw material wire rod into sections for subsequent steps, so that the efficiency is low, the cost is high, and a solution is needed.
[ summary of the invention ]
The invention aims to solve the problems in the prior art, and provides a wire cutting device for a nut, which can realize S-shaped bending of a wire, is convenient for cutting a plurality of wire sections at one time in the later period, and effectively improves the working efficiency.
In order to achieve the purpose, the invention provides a nut wire cutting device, which comprises an unwinding unit, a guiding unit, a bending unit, a cutting unit and a controller which are sequentially arranged from left to right, wherein the unwinding unit comprises a rotating seat, a rotating frame and a braking assembly, the rotating frame is fixed on a rotating shaft in the center of the top of the rotating seat, the braking assembly comprises a vertical braking rod and a friction pad, the vertical braking rod comprises a vertical rod body and a vertical friction ball, the vertical friction ball is fixed at the bottom end of the vertical rod body, a plurality of vertical rod bodies are sequentially fixed on the bottom surface of the rotating frame around the rotating shaft, the friction pad is fixed on the top surface of a box body, a frame cylinder for driving the rotating shaft to move up and down so as to drive the vertical friction ball to be closely attached to or far away from the friction pad is further arranged in the rotating seat, the bending unit comprises a bending device and a rack, and, the bending device comprises a wheel cylinder, a rotating wheel and a wheel frame, the wheel cylinder drives the rotating wheel to move front and back through the wheel frame, the cutting unit comprises a pressing head, a cutter and a machine table, the pressing head is located on the machine table and can move up and down to press or loosen a wire rod located on the machine table, the cutter is located on the front side and the back side of the pressing head, and the unreeling unit, the bending unit and the cutting unit are respectively electrically connected with the controller.
Preferably, the rotating seat comprises a box body, a supporting plate, a frame cylinder, a rotating shaft, a bottom plate and an inclined plate, the frame cylinder is fixed at the bottom end of an inner cavity of the box body, the supporting plate is fixed at the end part of a telescopic rod of the frame cylinder, the bottom end of the rotating shaft is fixed on the top surface of the supporting plate in a rotatable mode through a bearing, the rotating frame is fixed on the rotating shaft, the bottom plate is fixed on the bottom surface of the box body, and the inclined plate is sequentially fixed between the box body.
Preferably, the revolving rack includes vaulting pole and die-pin, a plurality of the bottom of vaulting pole is encircleed and is fixed on the outer wall of pivot, the vaulting pole is L font and top to the leading-in curved section of axle side bending formation of pivot, a plurality of the one end of die-pin is encircleed and is fixed on the outer wall of pivot, the other end of die-pin upwards buckles and forms the anticreep curved section.
Preferably, the guide unit comprises side columns and guide wheels, the guide wheels are respectively arranged at the front sides of the side columns and are arranged in two rows, and a guide gap is formed between the upper row of guide wheels and the lower row of guide wheels.
Preferably, the bottom surface of the wheel cylinder is fixed at one end of a sliding plate, the sliding plate is fixed at the top surface of the rack, the top surface of the sliding plate is provided with a plurality of sliding grooves, sliding blocks are fixedly arranged in the sliding grooves in a sliding mode, supporting blocks are fixedly arranged on the top surfaces of the sliding blocks, and the end portions of telescopic rods of the wheel cylinder and one end of the wheel carrier are respectively fixed at the left side and the right side of each supporting block.
Preferably, the runner is located above the support block.
Preferably, the number of the rotating wheels is two, and the rotating wheels are arranged in parallel front and back.
Preferably, the pressure head includes briquetting, briquetting cylinder and support, the briquetting cylinder passes through the support to be fixed in the top of board, the telescopic link tip at the briquetting cylinder is fixed to the briquetting, the cutter includes blade and blade cylinder, the blade cylinder is fixed respectively in the front and back both sides of briquetting, the telescopic link tip at the blade cylinder is fixed to the blade.
The invention has the beneficial effects that: according to the invention, the vertical brake rod and the friction pad are respectively arranged on the bottom surface of the rotating frame and the top surface of the box body, and the frame cylinder is utilized to drive the rotating frame to move downwards, so that the vertical friction ball is close to the friction pad, and the rotating frame is gradually stopped under the action of friction force, and the rotating frame has the advantages of simple integral structure, low cost, convenience in maintenance and good braking effect; the lead-in bent section is arranged on the support rod, so that the disc elements can be conveniently placed in the lead-in bent section; the anti-falling bent section is arranged on the support rod, so that the disc element is effectively prevented from falling off; the front side and the rear side of the top surface of the rack are provided with the plurality of bending devices in a staggered manner, and the wheel cylinder is utilized to drive the wheel frame and the rotating wheel fixed on the wheel frame to move to one side close to the cylinder body, so that the wire is pulled to move through the rotating wheel, S-shaped bending of the wire is realized, a cutting unit can conveniently form a plurality of wire sections in one-time cutting process, and the working efficiency is effectively improved; the top surface of the sliding plate is provided with a plurality of sliding grooves which are matched with the sliding blocks and the supporting blocks, so that the rotating wheel can play a role in guiding in the process of back-and-forth movement.
The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.
[ description of the drawings ]
FIG. 1 is a front view of a wire slitting device for nuts according to the present invention;
fig. 2 is a front view of an unwinding device of the wire rod slitting device for the nut;
fig. 3 is a cross-sectional view of a rotary base of an unwinding device of a wire rod splitting device for nuts after a bottom plate and an inclined plate are removed;
FIG. 4 is a plan view of a bending unit of the wire slitting device for nuts according to the present invention;
FIG. 5 is a front view of a crimper of the wire slitting device for nuts in accordance with the present invention;
FIG. 6 is a plan view of a bending machine of the wire slitting device for nuts according to the present invention;
fig. 7 is a plan view of a cutting unit of the nut wire-slitting device of the present invention.
In the figure: 1-rotating seat, 11-box body, 111-guide sleeve, 13-supporting plate, 14-frame cylinder, 15-rotating shaft, 16-bottom plate, 17-sloping plate, 2-rotating frame, 21-supporting rod, 211-leading-in bending section, 22-supporting rod, 221-anti-falling bending section, 3-braking component, 31-vertical braking rod, 311-vertical rod body, 312-vertical friction ball, 32-friction pad, 4-leading-in unit, 41-side column, 42-guide wheel, 5-bending device, 51-sliding plate, 511-sliding groove, 52-wheel cylinder, 53-supporting block, 54-sliding block, 55-rotating wheel, 56-wheel frame, 6-frame, 7-pressure head, 71-pressure block, 72-pressure block cylinder, 73-a bracket, 8-a cutter, 81-a blade, 82-a blade cylinder and 9-a machine table.
[ detailed description ] embodiments
Referring to fig. 1 to 7, the wire cutting device for the nut of the present invention comprises an unwinding unit, a guiding unit 4, a bending unit, a cutting unit and a controller, which are sequentially arranged from left to right, wherein the unwinding unit comprises a rotating base 1, a rotating base 2 and a braking assembly 3, the rotating base 2 is fixed on a rotating shaft 15 at the center of the top of the rotating base 1, the braking assembly 3 comprises a vertical braking rod 31 and a friction pad 32, the vertical braking rod 31 comprises a vertical rod 311 and a vertical friction ball 312, the vertical friction ball 312 is fixed at the bottom end of the vertical rod 311, a plurality of vertical rods 311 are sequentially fixed on the bottom surface of the rotating base 2 around the rotating shaft 15, the friction pad 32 is fixed on the top surface of a box body 11, a frame cylinder 14 for driving the rotating shaft 15 to move up and down so as to drive the vertical friction ball 312 to be closely attached to or far away from the friction pad 32 is further arranged in the rotating base 1, a plurality of the crisscross both sides around the top surface of frame 6 of setting of scratcher 5, scratcher 5 includes wheel cylinder 52, runner 55 and wheel carrier 56, wheel cylinder 52 passes through wheel carrier 56 drive runner 55 seesaw, the cutting unit includes pressure head 7, cutter 8 and board 9, thereby pressure head 7 is located on board 9 and can the up-and-down motion sticiss or loosen the wire rod that is located on board 9, cutter 8 is located the front and back both sides of pressure head 7, unreel unit, bending unit and cutting unit and be connected with the controller electricity respectively.
The rotary seat 1 comprises a box body 11, a supporting plate 13, a frame cylinder 14, a rotating shaft 15, a bottom plate 16 and an inclined plate 17, the frame cylinder 14 is fixed at the bottom end of the inner cavity of the box body 11, the supporting plate 13 is fixed at the end part of a telescopic rod of the frame cylinder 14, the bottom end of the rotating shaft 15 is fixed on the top surface of the supporting plate 13 in a rotatable mode through a bearing, the rotary frame 2 is fixed on the rotating shaft 15, the bottom plate 16 is fixed on the bottom surface of the box body 11, and the inclined plate 17 is sequentially fixed between the box body 11 and.
The rotating frame 2 comprises supporting rods 21 and supporting rods 22, the bottom ends of the supporting rods 21 are fixed on the outer wall of the rotating shaft 15 in an encircling mode, the supporting rods 21 are L-shaped, the top ends of the supporting rods 21 are bent towards one side of the central axis of the rotating shaft 15 to form guiding bent sections 211, one ends of the supporting rods 22 are fixed on the outer wall of the rotating shaft 15 in an encircling mode, and the other ends of the supporting rods 22 are bent upwards to form anti-falling bent sections 221.
The guiding unit 4 comprises a side column 41 and guide wheels 42, wherein the guide wheels 42 are respectively arranged at the front side of the side column 41 and are arranged in two rows, and a guiding gap is formed between the upper row of guide wheels 42 and the lower row of guide wheels 42.
The bottom surface of the wheel cylinder 52 is fixed at one end of a sliding plate 51, the sliding plate 51 is fixed at the top surface of the frame 6, the top surface of the sliding plate 51 is provided with a plurality of sliding grooves 511, sliding blocks 54 are fixed in the sliding grooves 511 in a sliding manner, supporting blocks 53 are fixed at the top surfaces of the sliding blocks 54, and the end parts of telescopic rods of the wheel cylinder 52 and one end of the wheel carrier 56 are respectively fixed at the left side and the right side of the supporting blocks 53.
The runner 55 is located above the support block 53.
The number of the rotating wheels 55 is two and the rotating wheels are arranged in parallel front and back.
The pressure head 7 comprises a pressing block 71, a pressing block air cylinder 72 and a support 73, the pressing block air cylinder 72 is fixed above the machine table 9 through the support 73, the pressing block 71 is fixed at the end part of an expansion rod of the pressing block air cylinder 72, the cutter 8 comprises a blade 81 and a blade air cylinder 82, the blade air cylinder 82 is respectively fixed at the front side and the rear side of the pressing block 71, and the blade 81 is fixed at the end part of the expansion rod of the blade air cylinder 82.
The working process of the invention is as follows:
first, the disk unit is directly sleeved outside the support rod 21, and the bottom surface of the disk unit is lifted by the support rod 22. Then, after the end of the coil passes through the guide gap of the guide unit 4, the wire sequentially passes through the plurality of bending devices 5 from left to right, and is arranged below the center axis of the rotating wheel 55 at the lower side and above the center axis of the rotating wheel 55 at the upper side, and then the end is placed on the top surface of the machine table 9, and the pressing block 71 is pressed down by the pressing block cylinder 72, so that the end is pressed on the machine table 9. Subsequently, the wheel cylinder 52 pulls the support block 53 to move to a side close to the cylinder body by the telescopic rod, thereby pulling the wire to move by the turning wheel 55, so that the wire is bent into an S-shape. After the bending is finished, the wheel cylinder 52 drives the supporting block 53 to return to the original position. Then, the wire rod section bent into the S shape is placed on the top surface of the machine table 9 and pressed tightly, and the subsequent linear wire rod continues to pass through the bending device 5 to wait for bending, and the operation is repeated. In the working process of the bender 5, the blade cylinder 82 drives the blade 81 to descend, and the upper and lower bent ends of the S-shaped section on the top surface of the cutting machine 9 are cut off to form a section of wire rod section for subsequent processing.
When the rotating frame 2 needs to stop rotating, the frame cylinder 14 drives the rotating shaft 15 to move downwards through the telescopic rod, so that the vertical friction ball 312 is close to the friction pad 32, and the rotating frame 2 is gradually stopped.
According to the invention, the vertical brake rod and the friction pad are respectively arranged on the bottom surface of the rotating frame and the top surface of the box body, and the frame cylinder is utilized to drive the rotating frame to move downwards, so that the vertical friction ball is close to the friction pad, and the rotating frame is gradually stopped under the action of friction force, and the rotating frame has the advantages of simple integral structure, low cost, convenience in maintenance and good braking effect; the lead-in bent section is arranged on the support rod, so that the disc elements can be conveniently placed in the lead-in bent section; the anti-falling bent section is arranged on the support rod, so that the disc element is effectively prevented from falling off; the front side and the rear side of the top surface of the rack are provided with the plurality of bending devices in a staggered manner, and the wheel cylinder is utilized to drive the wheel frame and the rotating wheel fixed on the wheel frame to move to one side close to the cylinder body, so that the wire is pulled to move through the rotating wheel, S-shaped bending of the wire is realized, a cutting unit can conveniently form a plurality of wire sections in one-time cutting process, and the working efficiency is effectively improved; the top surface of the sliding plate is provided with a plurality of sliding grooves which are matched with the sliding blocks and the supporting blocks, so that the rotating wheel can play a role in guiding in the process of back-and-forth movement.
The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.
Claims (8)
1. The utility model provides a device is cut to wire rod for nut which characterized in that: the device comprises an unreeling unit, a guiding-in unit (4), a bending unit, a cutting unit and a controller which are sequentially arranged from left to right, wherein the unreeling unit comprises a rotating seat (1), a rotating frame (2) and a braking assembly (3), the rotating frame (2) is fixed on a rotating shaft (15) in the center of the top of the rotating seat (1), the braking assembly (3) comprises a vertical braking rod (31) and a friction pad (32), the vertical braking rod (31) comprises a vertical rod body (311) and a vertical friction ball (312), the vertical friction ball (312) is fixed at the bottom end of the vertical rod body (311), a plurality of vertical rod bodies (311) are sequentially fixed on the bottom surface of the rotating frame (2) around the rotating shaft (15), the friction pad (32) is fixed on the top surface of a box body (11), and a frame cylinder (14) for driving the rotating shaft (15) to move up and down to drive the vertical friction ball (312) to be clung to or to be far away from the friction, the unit of buckling includes scratcher (5) and frame (6), a plurality of scratcher (5) crisscross both sides around the top surface of frame (6) of setting, scratcher (5) are including taking turns cylinder (52), runner (55) and wheel carrier (56), wheel cylinder (52) are through wheel carrier (56) drive runner (55) seesaw, cutting unit includes pressure head (7), cutter (8) and board (9), thereby pressure head (7) are located on board (9) and can up-and-down motion sticiss or loosen the wire rod that is located on board (9), cutter (8) are located the front and back both sides of pressure head (7), unreel unit, buckle unit and cutting unit and be connected with the controller electricity respectively.
2. The wire rod cutting device for the nut as claimed in claim 1, wherein: the rotary seat (1) comprises a box body (11), a support plate (13), a frame cylinder (14), a rotary shaft (15), a bottom plate (16) and an inclined plate (17), the frame cylinder (14) is fixed at the bottom end of the inner cavity of the box body (11), the end part of a telescopic rod of the frame cylinder (14) is fixed on the support plate (13), the bottom end of the rotary shaft (15) is rotatably fixed on the top surface of the support plate (13) through a bearing, the rotary frame (2) is fixed on the rotary shaft (15), the bottom plate (16) is fixed on the bottom surface of the box body (11), and the inclined plate (17) is sequentially fixed between the box body (11) and the bottom plate (16).
3. The wire rod cutting device for the nut as claimed in claim 1, wherein: revolving rack (2) are including vaulting pole (21) and die-pin (22), a plurality of the bottom of vaulting pole (21) is encircleed and is fixed on the outer wall of pivot (15), vaulting pole (21) are L font and top and form leading-in curved section (211), a plurality of to the axis side bending of pivot (15) the one end of die-pin (22) is encircleed and is fixed on the outer wall of pivot (15), the other end of die-pin (22) is upwards buckled and is formed anticreep curved section (221).
4. The wire rod cutting device for the nut as claimed in claim 1, wherein: the guiding unit (4) comprises side columns (41) and guide wheels (42), the guide wheels (42) are respectively arranged on the front sides of the side columns (41) and are arranged in two rows, and guiding gaps are formed between the upper row of guide wheels and the lower row of guide wheels (42).
5. The wire rod cutting device for the nut as claimed in claim 1, wherein: the bottom surface of the wheel cylinder (52) is fixed at one end of a sliding plate (51), the sliding plate (51) is fixed at the top surface of the rack (6), the top surface of the sliding plate (51) is provided with a plurality of sliding grooves (511), sliding blocks (54) are fixed in the sliding grooves (511) in a sliding mode, supporting blocks (53) are fixed at the top surface of the sliding blocks (54), and the end portions of telescopic rods of the wheel cylinder (52) and one end of a wheel carrier (56) are fixed at the left side and the right side of each supporting block (53) respectively.
6. The wire rod cutting device for the nut as claimed in claim 5, wherein: the rotating wheel (55) is positioned above the supporting block (53).
7. The wire rod cutting device for the nut as claimed in claim 1, wherein: the number of the rotating wheels (55) is two, and the rotating wheels are arranged in parallel front and back.
8. The wire rod cutting device for the nut as claimed in claim 1, wherein: pressure head (7) are including briquetting (71), briquetting cylinder (72) and support (73), briquetting cylinder (72) are fixed in the top of board (9) through support (73), the telescopic link tip at briquetting cylinder (72) is fixed in briquetting cylinder (71), cutter (8) are including blade (81) and blade cylinder (82), both sides around briquetting (71) are fixed respectively in blade cylinder (82), the telescopic link tip at blade cylinder (82) is fixed in blade (81).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010681205.6A CN111940635A (en) | 2020-07-15 | 2020-07-15 | Wire cutting device for nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010681205.6A CN111940635A (en) | 2020-07-15 | 2020-07-15 | Wire cutting device for nut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111940635A true CN111940635A (en) | 2020-11-17 |
Family
ID=73341827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010681205.6A Pending CN111940635A (en) | 2020-07-15 | 2020-07-15 | Wire cutting device for nut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111940635A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201168756Y (en) * | 2008-03-27 | 2008-12-24 | 天津市建科机械制造有限公司 | Metal wire benders |
| CN203448443U (en) * | 2013-09-17 | 2014-02-26 | 浙江金洲管道科技股份有限公司 | Uncoiled feeding tray device |
| CN106345935A (en) * | 2016-09-30 | 2017-01-25 | 宁波市阳光汽车配件有限公司 | Automatic bend-forming device and method of automobile sun-shading plate steel wire framework |
| CN107570639A (en) * | 2017-10-26 | 2018-01-12 | 德清鼎兴电子有限公司 | A kind of copper cash multistage cutting machine |
| US20180161849A1 (en) * | 2016-12-09 | 2018-06-14 | L&P Property Management Company | Feedback-based system for bending wire and forming springs |
| CN110153328A (en) * | 2019-05-21 | 2019-08-23 | 重庆化工职业学院 | A kind of bending reinforcement equipment |
-
2020
- 2020-07-15 CN CN202010681205.6A patent/CN111940635A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201168756Y (en) * | 2008-03-27 | 2008-12-24 | 天津市建科机械制造有限公司 | Metal wire benders |
| CN203448443U (en) * | 2013-09-17 | 2014-02-26 | 浙江金洲管道科技股份有限公司 | Uncoiled feeding tray device |
| CN106345935A (en) * | 2016-09-30 | 2017-01-25 | 宁波市阳光汽车配件有限公司 | Automatic bend-forming device and method of automobile sun-shading plate steel wire framework |
| US20180161849A1 (en) * | 2016-12-09 | 2018-06-14 | L&P Property Management Company | Feedback-based system for bending wire and forming springs |
| CN107570639A (en) * | 2017-10-26 | 2018-01-12 | 德清鼎兴电子有限公司 | A kind of copper cash multistage cutting machine |
| CN110153328A (en) * | 2019-05-21 | 2019-08-23 | 重庆化工职业学院 | A kind of bending reinforcement equipment |
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Application publication date: 20201117 |
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