CN107716690A - A kind of shaped device and method of body of a motor car part list seam - Google Patents
A kind of shaped device and method of body of a motor car part list seam Download PDFInfo
- Publication number
- CN107716690A CN107716690A CN201711239472.2A CN201711239472A CN107716690A CN 107716690 A CN107716690 A CN 107716690A CN 201711239472 A CN201711239472 A CN 201711239472A CN 107716690 A CN107716690 A CN 107716690A
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- Prior art keywords
- mould
- die cavity
- pipe fitting
- motor car
- seam
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 238000000137 annealing Methods 0.000 claims abstract description 4
- 238000002347 injection Methods 0.000 claims abstract description 4
- 239000007924 injection Substances 0.000 claims abstract description 4
- 238000007493 shaping process Methods 0.000 claims description 13
- 238000000465 moulding Methods 0.000 claims description 5
- 238000012856 packing Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
-
- 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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/047—Mould construction
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses a kind of shaped device of body of a motor car part list seam, it includes pipe fitting is put into the first mould therein successively, second mould and the 3rd mould, first mould, second mould and the 3rd mould include two clampings for being capable of matched moulds, clamping offers die cavity, when the die is closed, first mould, second mould and the 3rd mould form the first die cavity respectively, second die cavity and the 3rd die cavity, top tight sealing is provided with plunger drift respectively at the both ends of each die cavity, and the hydraulic interface of oriented pipe fitting intracavitary injection highly pressurised liquid is opened up on one of plunger drift.The present invention is also corresponding to disclose a kind of forming method of body of a motor car part list seam, including：1) internal pressure is preforming；2) once anneal；3) secondary internal pressure is preforming；4) double annealing；5) seam is molded；6) release, divide mould, obtain the pipe fitting of target shape.
Description
Technical field
The present invention relates to body of a motor car forming parts technical field, more particularly to a kind of body of a motor car part list seam into
Type device and method.
Background technology
Current country promotes pure electric automobile development energetically.Electric automobile during traveling mileage determines the reality of electric automobile
With property, and the distance travelled of electric automobile and complete vehicle weight have relation, so vehicle parts lightweight is particularly important.
Conventional ones technique, stock utilization is low, forming accuracy is poor causes general assembly error to be difficult to control, and is not easy into
The complex-shaped part of shape, integration need to be realized by welding or other means, but such mode causes finished product in weld
Thickness and it is uneven, size is inaccurate, reduce the mechanical performances such as intensity, the rigidity of component to a certain degree, more important is make
Into pts wt rising！
At present, occur a kind of inner high voltage forming technique in industry, i.e., by inside pipe fitting apply pressure, and once into
Type obtains required Shape Parts, and this technology can significantly simplify car body frame structure and effectively subtract for automobile industry
Weight, while its finished material rate is very high, and can be applied to vehicle body many places.Therefore it is a direction for being worth research in this area.
The content of the invention
It is an object of the present invention to provide a kind of shaped device of body of a motor car part list seam, to solve current car
Body part is by punching press, the molding part weight weight of welding, quality is low, consumes the problem of material and mould are more.
Another object of the present invention is to provide a kind of forming method of body of a motor car part list seam, to solve current car
Body part is by the way that the process of punching press, welding fabrication process is various, post processing workload is big, cost of labor and die cost is big asks
Topic.
For the above-mentioned purpose, the present invention uses following technical scheme：
A kind of shaped device of body of a motor car part list seam, it includes pipe fitting is put into the first shaping mould therein successively
Tool, the second mould and the 3rd mould, the first mould, the second mould and the 3rd mould include two
The individual clamping for being capable of matched moulds, clamping offer die cavity, when the die is closed, the first mould, the second mould and the 3rd shaping
Mould forms the first die cavity, the second die cavity and the 3rd die cavity respectively, and top tight sealing is provided with plunger respectively at the both ends of each die cavity
Drift, and the hydraulic interface of oriented pipe fitting intracavitary injection highly pressurised liquid is opened up on one of plunger drift；
First die cavity is closing chamber, and die cavity contour shape is more than former pipe fitting and is no more than target part；
Second die cavity offers a flange and forms groove, and die cavity contour shape is equal to target part；
3rd die cavity corresponding flange formation groove offers the rabbet groove for flange to be pressed into seam.
The device realizes the preforming shaping to final seam of pipe fitting by the way that pipe fitting is passed through into three moulds successively, its
In by pipe fitting intracavitary inject highly pressurised liquid so that pipe wall is gradually bonded die cavity wall, obtains desired shape.
Wherein, the first die cavity, the second die cavity, the 3rd die cavity both ends port diameter it is identical with the diameter of pipe fitting.It is real
Effective sealing of existing plunger drift.
Wherein, the first die cavity, the second die cavity, the equal sealed set in both ends of the 3rd die cavity have fixed port, fixed port
Port inner diameter is identical with the diameter of pipe fitting.Strengthen sealing effectiveness, prevent the leakage of highly pressurised liquid.
Wherein, the outside of plunger drift is withstood by hydraulic cylinder.To pipe fitting intracavitary pressure and pressurize.
Wherein, the equal outer engagement moulding press of clamping.Carry out matched moulds, divide mould control.
The invention also discloses a kind of forming method of body of a motor car part list seam, using above-mentioned body of a motor car part
The shaped device of single seam, it comprises the following steps：
1) internal pressure is preforming, and former pipe fitting is put into the first mould, the plunger drift at the die cavity both ends of matched moulds
It is pressed into the presence of hydraulic cylinder and seals pipe fitting chamber, and highly pressurised liquid is injected to pipe fitting intracavitary by hydraulic interface, in liquid
In the presence of pressure and plunger drift, pipe fitting cavity pressure constantly increases, so that pipe fitting forced expansion is according to the first die cavity
Shape forms the first preformed member；
2) once anneal, remove the first preformed member stress concentration；
3) secondary internal pressure is preforming, and the first preformed member is put into the second mould, injects high pressure liquid with step 1)
Body makes pipe fitting be bonded mold cavity shapes, while forms the second preformed member of unilateral flange；
4) double annealing, the second preformed member stress concentration is removed；
5) seam is molded, and the second preformed member is put into the 3rd mould, is pressed into flange part by matched moulds press
Seam；
6) release, divide mould, obtain the pipe fitting of target shape.
Wherein, step 1) and 3) in, be required to pipe fitting again matched moulds, pressure and release, divide mould.
Wherein, in step 5), during flange part is pressed into seam, pipe fitting intracavitary is in packing state.
To sum up, beneficial effects of the present invention are that compared with prior art, the shaping of the body of a motor car part list seam fills
Put and method, by it is hollow replace instead of solid, variable cross-section uiform section, it is overall replace piecemeal in a manner of improve stock utilization and
Forming accuracy, while weight can also be mitigated in the case where the mechanical performances such as intensity, rigidity meet, in addition, the process
Suitable for the pipe fitting of different wall, effectively reduce number of components, save material, simplify process, reduce cost of labor and
Die cost, it is practical.
Brief description of the drawings
Fig. 1 is the first shaping mould of the shaped device for the body of a motor car part list seam that the specific embodiment of the invention provides
The structural representation of tool；
Fig. 2 is sectional view at A-A in Fig. 1；
Fig. 3 is the second shaping mould of the shaped device for the body of a motor car part list seam that the specific embodiment of the invention provides
The structural representation of tool；
Fig. 4 is sectional view at B-B in Fig. 3；
Fig. 5 is the 3rd shaping mould of the shaped device for the body of a motor car part list seam that the specific embodiment of the invention provides
The structural representation of tool；
Fig. 6 is sectional view at C-C in Fig. 5；
Fig. 7 is the technological process of the forming method for the body of a motor car part list seam that the specific embodiment of the invention provides
Figure.
Embodiment
Further illustrate technical scheme below in conjunction with the accompanying drawings and by embodiment.
Refer to shown in Fig. 1 to 6, present embodiments provide a kind of shaped device of body of a motor car part list seam, including
Pipe fitting is put into the first mould 1, the second mould 2 and the 3rd shaping mould 3 therein successively to have, the first mould 1,
Second mould 2 and the 3rd shaping mould 3 have and include two clampings for being capable of matched moulds, and clamping offers die cavity, when the die is closed,
First mould 1, the second mould 2 and the 3rd shaping mould 3 have forms the first die cavity, the second die cavity and the 3rd mould respectively
Chamber, top tight sealing is provided with plunger drift 4 respectively at the both ends of each die cavity, and opens up oriented pipe on one of plunger drift 4
Part intracavitary injects the hydraulic interface 5 of highly pressurised liquid 8；
Wherein, the first die cavity is closing chamber, and die cavity contour shape is more than former pipe fitting and is no more than target part；
Second die cavity offers a flange and forms groove 21, and die cavity contour shape is equal to target part；
3rd die cavity corresponding flange formation groove 21 offers the rabbet groove 31 for flange 71 to be pressed into seam 72.
The device realizes that pipe fitting is preforming from the first preformed member 6 to the second by the way that pipe fitting is passed through into three moulds successively
Part 7, seam 72 being ultimately formed, wherein by injecting highly pressurised liquid 8 in pipe fitting intracavitary so that pipe wall is gradually bonded die cavity wall,
Obtain desired shape.
First die cavity, the second die cavity, the 3rd die cavity both ends port diameter it is identical with the diameter of pipe fitting, realize plunger
Effective sealing of drift 4.
First die cavity, the second die cavity, the equal sealed set in both ends of the 3rd die cavity have fixed port 9, the port of fixed port 9
Internal diameter is identical with the diameter of pipe fitting, strengthens sealing effectiveness, prevents the leakage of highly pressurised liquid 8.
The outside of plunger drift 4 is withstood by hydraulic cylinder, to pipe fitting intracavitary pressure and pressurize.
The equal outer engagement moulding press of clamping, carry out matched moulds, divide mould control.
The medium that highly pressurised liquid 8 uses can be oil or other pressurized fluids, be distinguished according to the structure of forming part.
Refer to shown in Fig. 7, for above-mentioned device, the present embodiment additionally provides a kind of body of a motor car part list seam
Forming method, it comprises the following steps：
1) internal pressure is preforming, and former pipe fitting is put into the first mould 1, the plunger drift at the die cavity both ends of matched moulds
4 are pressed into the presence of hydraulic cylinder and seal pipe fitting chamber, and inject highly pressurised liquid 8 to pipe fitting intracavitary by hydraulic interface 5, in liquid
In the presence of body pressure and plunger drift 4, pipe fitting cavity pressure constantly increases, so that pipe fitting forced expansion is according to the first die cavity
Shape formed the first preformed member 6；
2) once anneal, remove the stress concentration of the first preformed member 6；
3) secondary internal pressure is preforming, and the first preformed member 6 is put into the second mould 2, injects high pressure with step 1)
Liquid 8 makes pipe fitting be bonded mold cavity shapes, while forms the second preformed member 7 of unilateral flange 71；
4) double annealing, the stress concentration of the second preformed member 7 is removed；
5) seam is molded, and the second preformed member 7 is put into during the 3rd shaping mould 3 has, pressed flange 71 by matched moulds press
Into seam 72；
6) release, divide mould, obtain the pipe fitting of target shape.
It should be noted that step 1) and 3) in, be required to pipe fitting again matched moulds, pressure and release, divide mould；Step 5)
In, during flange 71 is pressed into seam 72, the intracavitary of the second preformed member 7 is in packing state.
The shaped device and method for the body of a motor car part list seam that the present embodiment provides, can make body of a motor car cavity knot
The seam side of structure, including A posts, B posts, C posts, sill strip, A post epimeres etc., and won initial success in actual production, such as using should
Shaped device and method manufacture Rear secondary frame for vehicle, part are reduced to 1 by 6, and number of molds is reduced to 3 pairs by 32 original pairs,
Die cost reduces 37%, has greatly saved die cost.In addition, by using hydraulic way, without electrified regulation tubing
And pressure-air, complex parts can be accomplished once-forming, reduce the number of parts of structure and welding weight, it is more traditional
Punch welding part mitigates 20%-30%；With turning/bore hole part comparison, 40%-50% can be mitigated, at most even up to 75%.
In addition, also there is advantage following prominent：
(1) energy loss is effectively reduced, while the generation of product defects can be reduced, improves yield rate；
(2) stock utilization is high, and average energy reaches more than 80%, and individual part can accomplish 90%；
(3) production environment is controllable, noiseless, without high temperature；
(4) uniform wall thickness of finished product, dimensional accuracy is high, and total quality is improved.
In summary, the shaped device of the body of a motor car part list seam in the present embodiment and method are replaced in fact with hollow
The heart, variable cross-section replace uiform section, the overall mode for replacing piecemeal to improve stock utilization and forming accuracy, while can also be strong
The mechanical performances such as degree, rigidity mitigate weight in the case of meeting.Wherein, the device is by passing through three moulds successively by pipe fitting,
Realize the preforming shaping to final seam of pipe fitting, wherein by pipe fitting intracavitary inject highly pressurised liquid so that pipe wall by
Die cavity wall is gradually bonded, obtains desired shape.The process is applied to the pipe fitting of different wall, effectively reduces part
Number, saves material, simplifies process, reduce cost of labor and die cost, practical.
Above example is to elaborate the general principle and characteristic of the present invention, and the present invention is not limited by above-mentioned example,
Without departing from the spirit and scope, the present invention also has various change and change, and these changes and modifications are both fallen within
In scope of the claimed invention.The scope of the present invention is defined by the appended claims and its equivalents.
Claims (8)
1. a kind of shaped device of body of a motor car part list seam, it is characterised in that including pipe fitting is put into therein successively
A molding tool, the second mould and the 3rd mould, first mould, the second mould and the 3rd shaping
Mould includes two clampings for being capable of matched moulds, and the clamping offers die cavity, when the die is closed, first mould,
Two moulds and the 3rd mould form the first die cavity, the second die cavity and the 3rd die cavity, the both ends point of each die cavity respectively
Other top tight sealing is provided with plunger drift, and oriented pipe fitting intracavitary injection highly pressurised liquid is opened up on one of them described plunger drift
Hydraulic interface；
First die cavity is closing chamber, and die cavity contour shape is more than former pipe fitting and is no more than target part；
Second die cavity offers a flange and forms groove, and die cavity contour shape is equal to target part；
3rd die cavity, which corresponds to the flange and forms groove, offers rabbet groove for flange to be pressed into seam.
2. the shaped device of body of a motor car part list seam according to claim 1, it is characterised in that：First mould
Chamber, the second die cavity, the 3rd die cavity both ends port diameter it is identical with the diameter of the pipe fitting.
3. the shaped device of body of a motor car part list seam according to claim 1, it is characterised in that：First mould
Chamber, the second die cavity, the equal sealed set in both ends of the 3rd die cavity have fixed port, the port inner diameter of the fixed port and the pipe
The diameter of part is identical.
4. the shaped device of body of a motor car part list seam according to claim 1, it is characterised in that：The plunger drift
Outside withstood by hydraulic cylinder.
5. the shaped device of body of a motor car part list seam according to claim 1, it is characterised in that：The clamping is outer
Engage moulding press.
A kind of 6. forming method of body of a motor car part list seam, using the body of a motor car as described in claim any one of 1-5
The shaped device of part list seam, it is characterised in that comprise the following steps：
1) internal pressure is preforming, and former pipe fitting is put into the first mould, and the plunger drift at the die cavity both ends of matched moulds is in liquid
Press-in seals pipe fitting chamber in the presence of cylinder pressure, and injects highly pressurised liquid to pipe fitting intracavitary by hydraulic interface, in fluid pressure
In the presence of plunger drift, pipe fitting cavity pressure constantly increases, so that shape of the pipe fitting forced expansion according to the first die cavity
Form the first preformed member；
2) once anneal, remove the first preformed member stress concentration；
3) secondary internal pressure is preforming, and the first preformed member is put into the second mould, makes with step 1) injection highly pressurised liquid
Pipe fitting is bonded mold cavity shapes, while forms the second preformed member of unilateral flange；
4) double annealing, the second preformed member stress concentration is removed；
5) seam is molded, and the second preformed member is put into the 3rd mould, flange part is pressed into seam by matched moulds press；
6) release, divide mould, obtain the pipe fitting of target shape.
7. the forming method of body of a motor car part list seam according to claim 6, it is characterised in that：Step 1) and 3)
In, it is required to pipe fitting again matched moulds, pressure and release, divides mould.
8. the forming method of body of a motor car part list seam according to claim 6, it is characterised in that：In step 5), institute
State during flange part is pressed into seam, pipe fitting intracavitary is in packing state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711239472.2A CN107716690A (en) | 2017-11-30 | 2017-11-30 | A kind of shaped device and method of body of a motor car part list seam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711239472.2A CN107716690A (en) | 2017-11-30 | 2017-11-30 | A kind of shaped device and method of body of a motor car part list seam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107716690A true CN107716690A (en) | 2018-02-23 |
Family
ID=61220143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711239472.2A Pending CN107716690A (en) | 2017-11-30 | 2017-11-30 | A kind of shaped device and method of body of a motor car part list seam |
Country Status (1)
| Country | Link |
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| CN (1) | CN107716690A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114951407A (en) * | 2022-05-12 | 2022-08-30 | 隆昌山川机械有限责任公司 | Internal high pressure multiple forming method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5070717A (en) * | 1991-01-22 | 1991-12-10 | General Motors Corporation | Method of forming a tubular member with flange |
| JP2003001336A (en) * | 2001-06-25 | 2003-01-07 | Aisin Takaoka Ltd | Method for manufacturing eccentric tube using hydroform method |
| US6739166B1 (en) * | 2002-12-17 | 2004-05-25 | General Motors Corporation | Method of forming tubular member with flange |
| JP2005305494A (en) * | 2004-04-20 | 2005-11-04 | Toyota Motor Corp | Hydraulic bulge forming method and hydraulic bulge forming apparatus |
| CN1754632A (en) * | 2004-09-29 | 2006-04-05 | 日产自动车株式会社 | Preform, hydroforming method and Hydroformed part |
| US20080035628A1 (en) * | 2003-10-28 | 2008-02-14 | Daimlerchrysler Ag | Production of Ihpf Components Having a Flange |
| US20100186477A1 (en) * | 2009-01-27 | 2010-07-29 | Bruno Barthelemy | Method of forming a flanged tubular member in hydroforming |
| CN105980075A (en) * | 2013-12-09 | 2016-09-28 | 住友重机械工业株式会社 | Molding device |
| CN106457723A (en) * | 2014-06-19 | 2017-02-22 | 住友重机械工业株式会社 | Molding system |
| CN207547362U (en) * | 2017-11-30 | 2018-06-29 | 苏州紫荆清远新能源汽车技术有限公司 | A kind of molding machine of body of a motor car part list seam allowance |
-
2017
- 2017-11-30 CN CN201711239472.2A patent/CN107716690A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5070717A (en) * | 1991-01-22 | 1991-12-10 | General Motors Corporation | Method of forming a tubular member with flange |
| JP2003001336A (en) * | 2001-06-25 | 2003-01-07 | Aisin Takaoka Ltd | Method for manufacturing eccentric tube using hydroform method |
| US6739166B1 (en) * | 2002-12-17 | 2004-05-25 | General Motors Corporation | Method of forming tubular member with flange |
| US20080035628A1 (en) * | 2003-10-28 | 2008-02-14 | Daimlerchrysler Ag | Production of Ihpf Components Having a Flange |
| JP2005305494A (en) * | 2004-04-20 | 2005-11-04 | Toyota Motor Corp | Hydraulic bulge forming method and hydraulic bulge forming apparatus |
| CN1754632A (en) * | 2004-09-29 | 2006-04-05 | 日产自动车株式会社 | Preform, hydroforming method and Hydroformed part |
| US20100186477A1 (en) * | 2009-01-27 | 2010-07-29 | Bruno Barthelemy | Method of forming a flanged tubular member in hydroforming |
| CN105980075A (en) * | 2013-12-09 | 2016-09-28 | 住友重机械工业株式会社 | Molding device |
| CN106457723A (en) * | 2014-06-19 | 2017-02-22 | 住友重机械工业株式会社 | Molding system |
| CN207547362U (en) * | 2017-11-30 | 2018-06-29 | 苏州紫荆清远新能源汽车技术有限公司 | A kind of molding machine of body of a motor car part list seam allowance |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114951407A (en) * | 2022-05-12 | 2022-08-30 | 隆昌山川机械有限责任公司 | Internal high pressure multiple forming method |
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Application publication date: 20180223 |