CN108906937A - A kind of bending machine - Google Patents
A kind of bending machine Download PDFInfo
- Publication number
- CN108906937A CN108906937A CN201810965710.6A CN201810965710A CN108906937A CN 108906937 A CN108906937 A CN 108906937A CN 201810965710 A CN201810965710 A CN 201810965710A CN 108906937 A CN108906937 A CN 108906937A
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- Prior art keywords
- strut
- fixedly connected
- straight line
- several
- pair
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- 238000005452 bending Methods 0.000 title claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 22
- 230000000694 effects Effects 0.000 claims abstract description 9
- 238000005096 rolling process Methods 0.000 claims abstract description 4
- 230000003028 elevating effect Effects 0.000 claims abstract description 3
- 238000006073 displacement reaction Methods 0.000 claims description 32
- 239000002828 fuel tank Substances 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 6
- 239000007787 solid Substances 0.000 description 3
- 238000010009 beating Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- 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
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/16—Auxiliary equipment, e.g. for heating or cooling of bends
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
-
- 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
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/06—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies
Abstract
A kind of bending machine.It is related to bending machine field of mechanisms.Propose that a kind of delicate structure, high reliablity, compensation effect are good and Working table structure stability is good, non-damageable bending machine.Including rack, sliding block, workbench and a pair of of straight line driving mechanism, the workbench is connected to the side of rack, the straight line driving mechanism is fixedly connected on the rack and is vertically arranged, the sliding block is fixedly connected with a pair of straight line driving mechanism and is located at the top of workbench, drives sliding block to do straight line elevating movement by straight line driving mechanism；The bottom end of the strut is hinged with idler wheel, and the idler wheel rolling is connected on the top surface of fixed plate and is bonded under the action of restraint assembly with fixed plate holding.The present invention has many advantages, such as that delicate structure, high reliablity, compensation effect are good and Working table structure stability is good on the whole, is hardly damaged.
Description
Technical field
The present invention relates to bending machine field of mechanisms.
Background technique
Currently, bending machine is influenced by sliding block flexible deformation in use, often occurring that bending is not in place, effect is poor etc. is asked
Topic.In this regard, proposing the structure of a variety of deflection compensations in the prior art, by the support to workbench, make its generation and sliding block
Consistent bending deformation, to cooperate with deformed sliding block efficient, stable to workpiece progress bending.
However, people have found after actual use, since workbench belongs to compression components, structural strength usually compared with
Height, therefore, after long-term reversed stress and under bending state, easily cracked, crack, serious or even appearance breakage
The problems such as, strong influence is brought to the stability of workbench.
Summary of the invention
The present invention is in view of the above problems, propose that a kind of delicate structure, high reliablity, compensation effect be good and Working table structure
Stability is good, non-damageable bending machine.
The technical scheme is that：Including rack, sliding block, workbench and a pair of of straight line driving mechanism, the workbench
It is connected to the side of rack, the straight line driving mechanism is fixedly connected on the rack and is vertically arranged, and the sliding block is fixedly connected
A pair of straight line driving mechanism and the top for being located at workbench drive sliding block to do straight line lifting fortune by straight line driving mechanism
It is dynamic；The workbench includes mainboard, a pair of of upper clamp plate, a pair of of lower clamp plate and several compensating cylinders, and a pair of lower clamp plate is parallel
It is arranged and the two is fixedly connected in the bottom of the side of rack, two upper clamp plates is respectively erected on two lower clamp plates and two
Upper clamp plate is fixedly linked with rack, and the top of the mainboard is placed between a pair of of upper clamp plate and the lower part of mainboard is placed in
Between a pair of of lower clamp plate；
Offer that several vertical through-hole, the lower part of two upper clamp plates are opened correspondingly with compensating cylinder in the middle part of the mainboard
Equipped with several and one-to-one fixation hole of compensating cylinder；The compensating cylinder includes cylinder body and piston rod, in the cylinder body
Portion is accommodated in vertical through-hole and the two sides of cylinder body are fixedly connected in fixation hole, the piston rod stretches out from the top surface of cylinder body,
And it is against on the top surface of vertical through-hole.
The bending machine further includes displacement detecting component and compensation driving assembly；
The displacement detecting component includes crossbeam, several struts and several displacement sensors, fixed company on the bottom surface of the sliding block
It is connected to upper mold, the upper mold is fixedly connected with the fixed plate along the setting of upper mold length direction, the strut backwards to the side of rack
The top of compensating cylinder is corresponded and is vertically arranged in compensating cylinder, and the bottom end of the strut fits in the top of fixed plate
On face；
The crossbeam is horizontally disposed and its both ends is fixedly connected on the tops of two straight line driving mechanisms, several displacement sensings
Device wears and is fixedly connected the crossbeam, and the detection bar of institute's displacement sensors extend out to the lower section of crossbeam, and the displacement passes
Sensor is corresponded with strut and the detection bar of displacement sensor and the top of strut fit when sliding block is in top dead-centre；
If the compensation driving assembly includes control centre, fuel tank and dry oil pump, several institute's displacement sensors, several oil
Pump is all connected with the control centre, and the oil pump and compensating cylinder are corresponded and be connected between fuel tank and compensating cylinder.
The displacement detecting component further includes several and the one-to-one strut of strut helps component, the strut support group
Part includes connection frame and sliding sleeve, and the top of the connection frame is fixedly connected on the bottom surface of crossbeam, the sliding sleeve
The bottom end of outer wall and connection frame is fixedly linked and is socketed in the middle part of strut；
The bottom end of the strut is hinged with idler wheel, and the idler wheel rolling is connected on the top surface of fixed plate and in restraint assembly
Effect is lower to be bonded with fixed plate holding.
The restraint assembly and strut correspond, and the restraint assembly includes bulge loop and spring, and the bulge loop is fixed to be connected
It connects in the lower part of strut, strut described in the spring empty set and is against between sliding sleeve and bulge loop.
The restraint assembly and strut correspond, and the restraint assembly includes convex block, upper magnet and lower magnet, described convex
Block is fixedly connected on the side of the bottom end of strut, and the upper magnet is fixedly connected on the bottom surface of convex block and is located at the one of idler wheel
Side, the lower magnet are fixedly connected on the top surface of fixed plate and are located at the underface of upper magnet, the bottom of the upper magnet with
The top polarity of lower magnet is opposite.
The present invention can effectively jack up local mainboard in cylinder body oil inlet pressurizing piston bar uplink, if in this way, can be by
The coordinated of dry compensating cylinder finally makes the top surface of mainboard bend to the radian being adapted to sliding block, plays good, stable
Compensating action.Wherein, it is influenced by the workbench of split type structure, will only be mainboard by occur deforming, and it is solid with rack
Surely the upper clamp plate and lower clamp plate connected is without deformation, to significantly reduce, workbench is cracked, possibility of crack, so that
Workbench integrally has preferable structural stability, has delicate structure, high reliablity, compensation effect good on the whole and work
Make that platform structural stability is good, the advantages that being hardly damaged.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of this case,
Fig. 2 is the left view of Fig. 1,
Fig. 3 is the optimal enforcement schematic diagram of this case,
Fig. 4 is the left view of Fig. 3,
Fig. 5 is the schematic diagram of this case compensation driving assembly,
Fig. 6 is that this case advanced optimizes embodiment schematic diagram,
Fig. 7 is the structural schematic diagram of the embodiment one of restraint assembly in this case,
Fig. 8 is the structural schematic diagram of the embodiment two of restraint assembly in this case；
11 be rack in figure, and 12 be sliding block, and 13 be workbench, and 131 be mainboard, and 1310 be vertical through-hole, and 132 be upper clamp plate,
1320 be fixation hole, and 133 be lower clamp plate 134 be compensating cylinder, and 14 be straight line driving mechanism, and 15 be upper mold, and 150 be fixed plate,
16 be lower die；
2 be displacement detecting component, and 21 be crossbeam, and 22 be strut, and 220 be idler wheel, and 23 be displacement sensor, and 230 be detection bar；24
It is connection frame, 25 be sliding sleeve, and 26 be restraint assembly, and 261 be bulge loop, and 262 be spring, and 263 be convex block, and 264 be upper magnet,
265 be lower magnet；31 be fuel tank, and 32 be oil pump.
Specific embodiment
As shown in figures 1-8, including rack 11, sliding block 12, workbench 13 and a pair of of straight line driving mechanism 14 are described by the present invention
Workbench 13 is connected to the side of rack 11, and the straight line driving mechanism 14 is fixedly connected in rack 11 and is vertically arranged, institute
It states sliding block 12 to be fixedly connected with a pair of straight line driving mechanism 14 and be located at the top of workbench 13, passes through straight line driving mechanism
14 driving sliding blocks 12 do straight line elevating movement；Upper mold 15 can be fixedly connected on the bottom surface of sliding block when use, and by lower die 16
It is fixedly connected on the top surface of workbench, to be completed by the cooperation of upper die and lower die to workpiece when sliding block is moved up and down
Bending；The workbench 13 includes mainboard 131（Its top surface and the bottom surface of lower die are fixedly linked）, it is a pair of of upper clamp plate 132, a pair of
Lower clamp plate 133 and several compensating cylinders 134, a pair of lower clamp plate 133 is arranged in parallel and the two is fixedly connected in rack 11
Side bottom, two upper clamp plates 132 are respectively erected on two lower clamp plates 133 and two upper clamp plates 132 are solid with rack 11
Fixed to be connected, the top of the mainboard 131 is placed between a pair of of upper clamp plate 132 and the lower part of mainboard 131 is placed under a pair and presss from both sides
Between plate 133；
The one-to-one vertical through-hole 1310 of several and compensating cylinder 134, two upper clamp plates are offered in the middle part of the mainboard 131
132 lower part offers several and one-to-one fixation hole 1320 of compensating cylinder 134；The compensating cylinder 134 includes cylinder
Body and piston rod are accommodated in vertical through-hole 1310 in the middle part of the cylinder body and the two sides of cylinder body are fixedly connected on fixation hole
In 1320, the piston rod is stretched out from the top surface of cylinder body and is against on the top surface of vertical through-hole 1310.It pressurizes and lives when cylinder body oil inlet
When stopper rod uplink, local mainboard can be effectively jacked up, in this way, can finally make by the coordinated of several compensating cylinders
The top surface of mainboard bends to the radian being adapted to sliding block, plays good, stable compensating action.Wherein, by split type structure
Workbench influences, and will only be mainboard by occur deforming, and the equal nothing of upper clamp plate and lower clamp plate being fixedly connected with rack
Deformation, to significantly reduce, workbench is cracked, possibility of crack, so that workbench integrally has preferable stable structure
Property, on the whole have delicate structure, high reliablity, compensation effect is good and Working table structure stability is good, is hardly damaged
Advantage.
Optimal enforcement mode：The bending machine further includes displacement detecting component 2 and compensation driving assembly 3；
The displacement detecting component 2 includes crossbeam 21, several struts 22 and several displacement sensors 23, the bottom surface of the sliding block 12
On be fixedly connected with upper mold 15, the upper mold 15 is fixedly connected with backwards to the side of rack 11 along the setting of 15 length direction of upper mold
Fixed plate 150, the strut 22 corresponds with compensating cylinder 134 and is vertically arranged in the top of compensating cylinder 134, described
The bottom end of strut 22 fits on the top surface of fixed plate 150；
The crossbeam 21 is horizontally disposed and its both ends is fixedly connected on the tops of two straight line driving mechanisms 14, several displacements
Sensor 23 wears and is fixedly connected the crossbeam 21, and the detection bar 230 of institute's displacement sensors 23 extend out to crossbeam 21
Lower section, institute's displacement sensors 23 and strut 22 correspond and when sliding block 12 is in top dead-centre displacement sensor 23 inspection
Measuring staff 230 and the top of strut 22 fit；
It is several institute's displacement sensors 23, several if the compensation driving assembly includes control centre, fuel tank 31 and dry oil pump 32
The oil pump 32 is all connected with the control centre, the oil pump 32 correspond and be connected to compensating cylinder 134 fuel tank 31 and
Between compensating cylinder 134.
With the bending deformation of upper mold, fixed plate will deform together, so that strut top when sliding block is in top dead-centre
Position change；In this way, returning to after top dead center whenever sliding block completes a stroke, displacement sensor is detectable primary solid
The deflection of fixed board and upper mold, to finally be driven converting the not driving signal to oil pump after control centre converts
Compensating cylinder below the displacement sensor compensates mainboard according to the displacement of strut, to the change of sliding block in the course of work
Shaped reaction is quickly, in time, accurate to the compensation of mainboard, efficient, has extremely accurate, stable, outstanding compensation effect.
This case also found in actual use, with the bending deformation of upper mold, sliding block and fixed plate, if by the bottom of strut
End is fixedly linked with fixed plate, then deviates the top of strut, so that compensation precision is seriously affected, in this regard, this case
It is also made that and optimizes further below.
Advanced optimize embodiment：The displacement detecting component 2 further includes several and the one-to-one strut of strut 22
Component is helped, it includes connection frame 24 and sliding sleeve 25 that the strut, which helps component, and the top of the connection frame 24 is fixedly connected
On the bottom surface of crossbeam 21, the outer wall of the sliding sleeve 25 and the bottom end of connection frame 24 are fixedly linked and are socketed in strut 22
Middle part；
The bottom end of the strut 22 is hinged with idler wheel 220, the rolling of idler wheel 220 be connected on the top surface of fixed plate 150 and
It is bonded under the action of restraint assembly 26 with the holding of fixed plate 150.In this way, first, it can be ensured that strut only does straight line along the vertical direction
It moves back and forth；Secondly, it can be ensured that the strut surface in its corresponding compensating cylinder vertical always, so that control centre pair
The conversion of data calculates i.e. for convenience.It has been obviously improved compensation precision on the whole, has avoided the benefit occurred by strut inclination
Repay the problems such as not in place.
Representative elaboration is carried out to restraint assembly below by two kinds of embodiments：
Embodiment one, the restraint assembly 26 are corresponded with strut 22, and the restraint assembly 26 includes bulge loop 261 and spring
262, the bulge loop 261 is fixedly connected on the lower part of strut 22, strut 22 described in 262 empty set of spring and is against sliding sleeve
Between cylinder 25 and bulge loop 261.To may make idler wheel to be crushed on the top surface of fixed plate in slide block movement to top dead-centre, this
Sample can effectively avoid when strut is up to top dead-centre and occur beating upwards because of inertia, ask so that compensation rate is excessive
Topic, the required precision of effective guarantee compensation.
Embodiment two, the restraint assembly 26 are corresponded with strut 22, the restraint assembly 26 include convex block 263, on
Magnet 264 and lower magnet 265, the convex block 263 are fixedly connected on the side of the bottom end of strut 22, and the upper magnet 264 is fixed
It is connected on the bottom surface of convex block 263 and is located at the side of idler wheel 220, the lower magnet 265 is fixedly connected on fixed plate 150
Underface on top surface and positioned at upper magnet 264, the bottom of the upper magnet 264 are opposite with the top polarity of lower magnet 265.
Thus under the influence of upper magnet, lower magnet, so that idler wheel is bonded with fixed plate holding always in sliding block action process, this
Sample can effectively avoid when strut is up to top dead-centre and occur beating upwards because of inertia, ask so that compensation rate is excessive
Topic, the required precision of effective guarantee compensation.
Claims (5)
1. a kind of bending machine, including rack, sliding block, workbench and a pair of of straight line driving mechanism, the workbench are connected to rack
Side, the straight line driving mechanism is fixedly connected on the rack and is vertically arranged, and the sliding block is fixedly connected a pair of described straight
Line driving mechanism and the top for being located at workbench drive sliding block to do straight line elevating movement by straight line driving mechanism；Its feature exists
In the workbench includes mainboard, a pair of of upper clamp plate, a pair of of lower clamp plate and several compensating cylinders, and a pair of lower clamp plate is parallel
It is arranged and the two is fixedly connected in the bottom of the side of rack, two upper clamp plates is respectively erected on two lower clamp plates and two
Upper clamp plate is fixedly linked with rack, and the top of the mainboard is placed between a pair of of upper clamp plate and the lower part of mainboard is placed in
Between a pair of of lower clamp plate；
Offer that several vertical through-hole, the lower part of two upper clamp plates are opened correspondingly with compensating cylinder in the middle part of the mainboard
Equipped with several and one-to-one fixation hole of compensating cylinder；The compensating cylinder includes cylinder body and piston rod, in the cylinder body
Portion is accommodated in vertical through-hole and the two sides of cylinder body are fixedly connected in fixation hole, the piston rod stretches out from the top surface of cylinder body,
And it is against on the top surface of vertical through-hole.
2. a kind of bending machine according to claim 1, which is characterized in that the bending machine further include displacement detecting component and
Compensate driving assembly；
The displacement detecting component includes crossbeam, several struts and several displacement sensors, fixed company on the bottom surface of the sliding block
It is connected to upper mold, the upper mold is fixedly connected with the fixed plate along the setting of upper mold length direction, the strut backwards to the side of rack
The top of compensating cylinder is corresponded and is vertically arranged in compensating cylinder, and the bottom end of the strut fits in the top of fixed plate
On face；
The crossbeam is horizontally disposed and its both ends is fixedly connected on the tops of two straight line driving mechanisms, several displacement sensings
Device wears and is fixedly connected the crossbeam, and the detection bar of institute's displacement sensors extend out to the lower section of crossbeam, and the displacement passes
Sensor is corresponded with strut and the detection bar of displacement sensor and the top of strut fit when sliding block is in top dead-centre；
If the compensation driving assembly includes control centre, fuel tank and dry oil pump, several institute's displacement sensors, several oil
Pump is all connected with the control centre, and the oil pump and compensating cylinder are corresponded and be connected between fuel tank and compensating cylinder.
3. a kind of bending machine according to claim 2, which is characterized in that the displacement detecting component further includes several and branch
The one-to-one strut of bar helps component, and it includes connection frame and sliding sleeve, the top of the connection frame that the strut, which helps component,
End is fixedly connected on the bottom surface of crossbeam, and the outer wall of the sliding sleeve and the bottom end of connection frame are fixedly linked and are socketed in branch
The middle part of bar；
The bottom end of the strut is hinged with idler wheel, and the idler wheel rolling is connected on the top surface of fixed plate and in restraint assembly
Effect is lower to be bonded with fixed plate holding.
4. a kind of bending machine according to claim 3, which is characterized in that the restraint assembly and strut correspond, institute
Stating restraint assembly includes bulge loop and spring, and the bulge loop is fixedly connected on the lower part of strut, strut described in the spring empty set and
It is against between sliding sleeve and bulge loop.
5. a kind of bending machine according to claim 3, which is characterized in that the restraint assembly and strut correspond, institute
Stating restraint assembly includes convex block, upper magnet and lower magnet, and the convex block is fixedly connected on the side of the bottom end of strut, the upper magnetic
Ferropexy is connected on the bottom surface of convex block and is located at the side of idler wheel, the lower magnet is fixedly connected on the top surface of fixed plate,
And it is located at the underface of upper magnet, the bottom of the upper magnet is opposite with the top polarity of lower magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810965710.6A CN108906937A (en) | 2018-08-23 | 2018-08-23 | A kind of bending machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810965710.6A CN108906937A (en) | 2018-08-23 | 2018-08-23 | A kind of bending machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108906937A true CN108906937A (en) | 2018-11-30 |
Family
ID=64405523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810965710.6A Pending CN108906937A (en) | 2018-08-23 | 2018-08-23 | A kind of bending machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108906937A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001038422A (en) * | 1999-07-29 | 2001-02-13 | Amada Co Ltd | Bend processing machine equipped with table flexure correction function |
| US20080066520A1 (en) * | 2004-09-10 | 2008-03-20 | Gerhard Sperrer | Method For Producing A Workpiece By Forming Under Bending Conditions |
| CN102601179A (en) * | 2012-01-12 | 2012-07-25 | 广州广船国际股份有限公司 | Bender |
| CN106955912A (en) * | 2017-04-28 | 2017-07-18 | 上海葛世工业自动化有限公司 | Automatic degree of disturbing compensation device and bender |
| CN107159747A (en) * | 2017-07-17 | 2017-09-15 | 安徽省航天机床制造股份有限公司 | A kind of multi-axis numerical control bender |
| CN206810893U (en) * | 2017-05-16 | 2017-12-29 | 北京京诚之星科技开发有限公司 | A kind of panel turnover machine and the compact association type equipment for straightening of press |
| CN208728395U (en) * | 2018-08-23 | 2019-04-12 | 江苏扬力数控机床有限公司 | Bending machine |
-
2018
- 2018-08-23 CN CN201810965710.6A patent/CN108906937A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001038422A (en) * | 1999-07-29 | 2001-02-13 | Amada Co Ltd | Bend processing machine equipped with table flexure correction function |
| US20080066520A1 (en) * | 2004-09-10 | 2008-03-20 | Gerhard Sperrer | Method For Producing A Workpiece By Forming Under Bending Conditions |
| CN102601179A (en) * | 2012-01-12 | 2012-07-25 | 广州广船国际股份有限公司 | Bender |
| CN106955912A (en) * | 2017-04-28 | 2017-07-18 | 上海葛世工业自动化有限公司 | Automatic degree of disturbing compensation device and bender |
| CN206810893U (en) * | 2017-05-16 | 2017-12-29 | 北京京诚之星科技开发有限公司 | A kind of panel turnover machine and the compact association type equipment for straightening of press |
| CN107159747A (en) * | 2017-07-17 | 2017-09-15 | 安徽省航天机床制造股份有限公司 | A kind of multi-axis numerical control bender |
| CN208728395U (en) * | 2018-08-23 | 2019-04-12 | 江苏扬力数控机床有限公司 | Bending machine |
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