CN105500010B - Hole-flanged threaded structure of thin plate and making process thereof - Google Patents
Hole-flanged threaded structure of thin plate and making process thereof Download PDFInfo
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- CN105500010B CN105500010B CN201610036098.5A CN201610036098A CN105500010B CN 105500010 B CN105500010 B CN 105500010B CN 201610036098 A CN201610036098 A CN 201610036098A CN 105500010 B CN105500010 B CN 105500010B
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- hole flanging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/04—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass for both machining and other metal-working operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Mechanical Engineering (AREA)
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- Optics & Photonics (AREA)
- Connection Of Plates (AREA)
- Punching Or Piercing (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses a hole-flanged threaded structure of a thin plate and a making process thereof. A boss structure is first stamped on the thin plate, a prefabricated hole is punched based on the boss structure, and then hole flanging and threading processes are performed. By the adoption of the arranged boss structure, the thin plate structure is thinned, the material removed from the prefabricated hole is decreased compared with the situation that the prefabricated hole is originally punched in the thin plate, and accordingly more material on a boss can uniformly flow towards the height portion of a flanged hole in the hole flanging process to increase hole flanging height and facilitate thread number increase in the threading process. After the hole flanging, the material is subjected to annealing treatment to release stress, improve material ductility and toughness and prevent flange crack after the hole flanging, accordingly the torque produced after the hole flanging and threading is increased, and the threaded connecting strength can be ensured. In addition, in the operating process, the hole diameter of the prefabricated hole can be effectively decreased, the diameter becomes smaller during hole flanging, and accordingly the engaging rate of the threads on a hole flanging mechanism can be improved.
Description
Technical field
The invention belongs to machining technology field, specifically, it is related to hole flanging helicitic texture and its system of a kind of thin plate
Standby technique.
Background technology
Hole flanging is by the stamping procedure of edge-on for material flange along around endoporus, is one kind of flange.Sheet stamping member is carried out
When threaded, it is desirable to have the connection screw thread length thick more than material, to guarantee its connection reliability, to strengthen its load capacity, because
, on the sheet-metal press working part of the products such as instrument and meter, electronic apparatus, all kinds of household electrical appliances, home appliances, toy, warp is frequently with screw thread for this
Draw bail, by processes such as hole flanging and flange, is washed into some minor thread bottom outlets, then imposes tapping.This operational approach
Boring can not only be replaced and increase substantially production efficiency, accurate dimension, the preferable bottom outlet of concordance can be obtained simultaneously, and can
Thread connection is made to have enough length, so that it is guaranteed that the bearing capacity of its coupling reliability and design requirement.
In prior art, on thin plate, flange hole technology mainly comprises the steps (as shown in Figure 8): is punched on thin plate
Carry out hole flanging again, the diameter of waste material e being punched is identical with the diameter p of pre-manufactured hole 5 after pre-manufactured hole 5；During hole flanging, prefabricated
A part of plate a of hole 5 both sides flows to perpendicular to the direction of thin plate, becomes the part of the plate b at the hole wall of hole flanging.This
During flange hole technology, the size of the waste material e that the diameter of pre-manufactured hole 5 is punched affect at the hole wall of hole flanging height
Degree, and number of threads when the height of hole wall then directly influences tapping.
But still there is more technical barrier in thin plate hole flanging tapping technique in prior art, be such as less than 1mm in thickness
Thin plate on when carrying out hole flanging tapping operation, due to lamella thickness not, hole flanging height is between 2.8-3.2mm, thus leading to
Screw thread negligible amounts during tapping, the moment of torsion that screw thread can bear is less it is impossible to realization is compared with high torque thread connection on thin plate.And
Hole flanging rear flange often cracking phenomenon, the problems such as flange height and hole flanging dimension overproof, thus greatly had influence on hole flanging
The intensity that rear thread connects is it is impossible to meet corresponding connection request.
And requiring for higher precision optical machinery for some, the thickness not requiring nothing more than thin plate sheet metal component is little, and requires
Firmly, such as, customer requirement screwed hole is m5, and tapping moment of torsion >=4.5n, according to routine taking the thin plate of thickness of slab t=0.8mm as a example for connection
Flange hole technology is operated, then pre-manufactured hole p=φ 2.5mm, hole flanging φ 4.64mm, and measurement after tapping obtains hole flanging height=2.4mm,
Moment of torsion=2.8～3.5nm is it is clear that the moment of torsion of screw thread that conventional flange hole technology obtains can not reach customer requirement.Therefore, existing skill
There are following two problems in thin plate hole flanging tapping technique in art to be badly in need of solving: 1, thickness of slab is thinning, then can lead to spiral shell after tapping
Stricture of vagina bonding strength declines；If the 2 effective tooth numbers of raising, due to the contradictory relation between prefabricated aperture and hole flanging height, reach
It is difficult to after certain limit improve.
Content of the invention
For the problems referred to above, the present invention proposes a kind of hole flanging helicitic texture and its preparation technology of thin plate, breaks the normal procedure and turns over
Hole helicitic texture and its theory of preparation technology, by punching press boss structure first on thin plate, then again in the base of boss structure
It is punched pre-manufactured hole on plinth, then carry out hole flanging, tapping operation again.Because the setting of boss structure is so that thin-slab structure is thinning, with
Originally the situation being directly punched pre-manufactured hole on thin plate is compared, and the material that pre-manufactured hole removes reduces, so that having more on boss
Material equably can flow to the height component of hole flanging during hole flanging, thus improving hole flanging height, beneficial in tapping
Increase ridge number in journey, and after hole flanging, material is made annealing treatment, make material discharge stress, increase material and extend
Property and toughness, preventing hole flanging rear flange cracking, thus improving the moment of torsion after hole flanging tapping, so that threaded intensity is protected
Card.The aperture of pre-manufactured hole simultaneously in this operating process, can be effectively reduced, and so that diameter during hole flanging is diminished, so that turning over
The contact-ratio of the screw thread in pore structure increases.
In order to solve the above problems, the technical solution adopted in the present invention:
A kind of hole flanging helicitic texture of thin plate, thin plate is provided with hole flanging structure, and described hole flanging structure includes hole and hole wall,
The ratio of the internal diameter d in the described hole and height h of hole wall is d:h=(2～5): (1～2)；The inwall of described hole wall is provided with spiral shell
Stricture of vagina, the spacing between adjacent thread is between 0.2～1.2mm；The inwall of the hole wall of described hole flanging structure and the portion of sheet contacts
Position is provided with oblique angle.
Preferably, the span at described oblique angle is 25～30 °.
Preferably, the internal diameter d in the hole of described hole flanging structure is d:d=(2～5 with the ratio of outside diameter d): (4～8).
Preferably, the material of described thin plate is secc-n5 ferrum, gauge of sheet is in the range of 0.7～1mm.
Using the preparation technology of the hole flanging helicitic texture of thin plate described above, comprise the steps of:
Step 1: punching press boss structure: need one height of position punching press of hole flanging between 0.4～1.5mm in thin plate
Boss structure, and the diameter of boss structure is less than the diameter of required hole flanging；
Step 2: pre-manufactured hole punching: be punched pre-manufactured hole in the center of boss structure；
Step 3: hole flanging: according to computing formula f of hole flanging powern=1.1πtσδ(r-p) calculate required power during hole flanging, its
In, fnHole flanging power, σδYield point, the diameter of r hole flanging, the prefabricated bore dia of p, t material thickness；It is punched in step 2
The pre-manufactured hole position of type, carries out hole flanging to boss structure using multi-ring Burring Punch in the range of hole flanging power, makes hole wall vertical
In thin plate, and stamp out the height needed for hole flanging；
Step 4: additional oblique angle: bevel angle α is set with the contact site of thin plate in the inwall of hole flanging structure；
Step 5: annealing: the thin plate after hole flanging is made annealing treatment；
Step 6: tapping: tapping on the inwall of hole flanging, make the inwall of hole flanging be provided with screw thread.
Further, in step 1, the height of boss structure is 0.2～1.2mm.
Further, in step 2, the diameter of pre-manufactured hole is in the range of 0.4～1.5mm.
Further, in step 3, described multi-ring Burring Punch includes annular punch and installation portion.
Beneficial effects of the present invention:
1st, the present invention breaks the normal procedure the theory of hole flanging helicitic texture and its preparation technology, by punching press boss first on thin plate
Structure, is then punched pre-manufactured hole on the basis of boss structure again, then carries out hole flanging, tapping operation again.Due to boss structure
Setting so that thin-slab structure is thinning, with originally directly on thin plate be punched pre-manufactured hole situation compared with, pre-manufactured hole remove material
Material reduces, so that there being more materials equably can flow to the height component of hole flanging during hole flanging on boss, thus
Improve hole flanging height, beneficial to increase ridge number during tapping；And after hole flanging, material is made annealing treatment, make
Material discharges stress, increases material ductility and toughness, prevents hole flanging rear flange cracking, simultaneously in this operating process
In, the aperture of pre-manufactured hole can be effectively reduced, and so that diameter during hole flanging is diminished, so that the contact-ratio of the screw thread on hole flanging structure
Increase.The moment of torsion of this hole flanging helicitic texture is big, can bear the connection of high torque.
2nd, in the range of hole flanging power allows, hole flanging is carried out to boss structure using multi-ring Burring Punch, make the material of thin plate
Hole flanging flange portion can uniformly be flowed to, further ensure the height of hole flanging flange.
3rd, after hole flanging, add oblique angle in the inwall of hole flanging structure with the contact site of thin plate, prevent thin plate hole flanging tapping from twisting
Tighten up a screw with nut after, the root of hole flanging deforms, thus improving the performance of product.
Brief description
Fig. 1 is the thin-slab structure schematic diagram of the present invention；
Fig. 2 is a schematic diagram of hole flanging structure of the present invention；
Fig. 3 is another schematic diagram of hole flanging structure of the present invention；
Fig. 4 hole flanging structure of the present invention is screwed on the schematic diagram after threaded fastener；
Fig. 5 is that in prior art, hole flanging structure is screwed on the deformation condition after threaded fastener；
Fig. 6 is the mplifying structure schematic diagram of deformation position m in Fig. 4；
Fig. 7 is the operating procedure schematic diagram that in the present invention, thin plate is punched flange hole technology；
Fig. 8 is the material flow schematic diagram that in the present invention, thin plate is punched during flange hole technology；
Fig. 9 is to be punched hole flanging process schematic in prior art；
Figure 10 is to be punched hole flanging process in which materials flow schematic diagram in prior art；
Figure 11 is the structural representation of multi-ring Burring Punch.
In figure, 1- thin plate, 2- hole flanging structure, 3- hole wall, 4- hole, 5- pre-manufactured hole, 6- boss structure, 7- annular punch, 8-
Installation portion, screw 9, nut 10.
Specific embodiment
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of not making creative work, all
Belong to the scope of protection of the invention.
Embodiment 1
As shown in figures 1-8, the hole flanging helicitic texture of a kind of thin plate, the material of thin plate 1 is secc-n5 ferrum, the thickness of thin plate 1
For 0.7mm, thin plate 1 is provided with hole flanging structure 2, and described hole flanging structure 2 includes hole 4 and hole wall 3；The internal diameter d in described hole 4 and hole
The value of the height h of wall 3 is respectively 4.51～4.60mm, 2.8mm, the value of the described internal diameter d in the hole 4 of hole flanging structure 2 and outside diameter d
It is respectively 4.51～4.60mm, 5.61～5.76mm；The inwall of described hole wall 3 is provided with screw thread, between adjacent thread between
Away between 0.2-1.2mm；The inwall of hole wall 3 of described hole flanging structure 2 is provided with bevel angle α with the position of the contact of thin plate 1, described
Bevel angle α angle be 25 °.
Using the preparation technology of the hole flanging helicitic texture of thin plate described above, comprise the steps of:
Step 1: punching press boss structure: need one height of position punching press of hole flanging between 0.4～1.5mm in thin plate 1
Boss structure 6, and the diameter of boss structure 6 be less than required hole flanging diameter；
Step 2: pre-manufactured hole punching: be punched pre-manufactured hole 5, the diameter p=φ of pre-manufactured hole 5 in the center of boss structure 6
2.5mm；
Step 3: hole flanging: according to computing formula f of hole flanging powern=1.1πtσδ(r-p) calculating required power during hole flanging is
874.76～913.92n, wherein, σδ=180mpa, r=d=4.51～4.60mm, p=2.5mm, t=0.7mm；It is punched in step 2
The position of the pre-manufactured hole 5 of type, carries out hole flanging to boss structure 6 using multi-ring Burring Punch in the range of hole flanging power, makes hole wall 3
Perpendicular to thin plate 1, and stamp out the height needed for hole flanging；
Step 4: additional oblique angle: 25 ° of bevel angle α is set with the contact site of thin plate 1 in the inwall of hole flanging structure 2；
Step 5: annealing: the thin plate 1 after hole flanging is made annealing treatment；
Step 6: tapping: tapping on the inwall of hole flanging, make the inwall of hole flanging be provided with screw thread.
It is 4.0～4.8n m by the moment of torsion that the present embodiment draws.
Embodiment 2
As shown in figures 1-8, the hole flanging helicitic texture of a kind of thin plate, the material of thin plate 1 is secc-n5 ferrum, the thickness of thin plate 1
For 0.8mm, thin plate 1 is provided with hole flanging structure 2, and described hole flanging structure 2 includes hole 4 and hole wall 3；The internal diameter d in described hole 4 and hole
The value of the height h of wall 3 is respectively 4.41～4.50mm, 3mm, and the described internal diameter d in the hole 4 of hole flanging structure 2 is divided with the value of outside diameter d
Wei not 4.41～4.50mm, 5.51～5.60mm；The inwall of described hole wall 3 is provided with screw thread, the spacing between adjacent thread
Between 0.2～1.2mm；The inwall of hole wall 3 of described hole flanging structure 2 is provided with bevel angle α with the position of the contact of thin plate 1, described
Bevel angle α angle be 27.5 °.
Using the preparation technology of the hole flanging helicitic texture of thin plate described above, comprise the steps of:
Step 1: punching press boss structure: need one height of position punching press of hole flanging between 0.4～1.5mm in thin plate 1
Boss structure 6, and the diameter of boss structure 6 be less than required hole flanging diameter；
Step 2: pre-manufactured hole punching: be punched pre-manufactured hole 5, the diameter p=φ of pre-manufactured hole 5 in the center of boss structure 6
2.5mm；
Step 3: hole flanging: according to computing formula f of hole flanging powern=1.1πtσδ(r-p) calculating required power during hole flanging is
949.98～994.75n, wherein, σδ=180mpa, r=d=4.41～4.50mm, p=2.5mm, t=0.8mm；It is punched in step 2
The position of the pre-manufactured hole 5 of type, carries out hole flanging to boss structure 6 using multi-ring Burring Punch in the range of hole flanging power, makes hole wall 3
Perpendicular to thin plate 1, and stamp out the height needed for hole flanging；
Step 4: additional oblique angle: 27.5 ° of bevel angle α is set with the contact site of thin plate 1 in the inwall of hole flanging structure 2；
Step 5: annealing: the thin plate 1 after hole flanging is made annealing treatment；
Step 6: tapping: tapping on the inwall of hole flanging, make the inwall of hole flanging be provided with screw thread.
It is 4.5～6.2n m by the moment of torsion that the present embodiment draws.
Embodiment 3
As shown in figures 1-8, the hole flanging helicitic texture of a kind of thin plate, the material of thin plate 1 is secc-n5 ferrum, the thickness of thin plate 1
For 1mm, thin plate 1 is provided with hole flanging structure 2, and described hole flanging structure 2 includes hole 4 and hole wall 3；The internal diameter d in described hole 4 and hole wall
The value of 3 height h is respectively 4.61～4.64mm, 3.2mm, and the described internal diameter d in the hole 4 of hole flanging structure 2 is divided with the value of outside diameter d
Wei not 4.61～4.64mm, 5.51～5.60mm；The inwall of described hole wall 3 is provided with screw thread, the spacing between adjacent thread
Between 0.2～1.2mm；The inwall of hole wall 3 of described hole flanging structure 2 is provided with bevel angle α with the position of the contact of thin plate 1, described
Bevel angle α angle be 30 °.
Using the preparation technology of the hole flanging helicitic texture of thin plate described above, comprise the steps of:
Step 1: punching press boss structure: need one height of position punching press of hole flanging between 0.4～1.5mm in thin plate 1
Boss structure 6, and the diameter of boss structure 6 be less than required hole flanging diameter；
Step 2: pre-manufactured hole punching: be punched pre-manufactured hole 5, the diameter p=φ of pre-manufactured hole 5 in the center of boss structure 6
2.5mm；
Step 3: hole flanging: according to computing formula f of hole flanging powern=1.1πtσδ(r-p) calculating required power during hole flanging is
1311.82～1330.48n, wherein, σδ=180mpa, r=d=4.61～4.64mm, p=2.5mm, t=1mm；It is punched in step 2
The position of the pre-manufactured hole 5 of type, carries out hole flanging to boss structure 6 using multi-ring Burring Punch in the range of hole flanging power, makes hole wall 3
Perpendicular to thin plate 1, and stamp out the height needed for hole flanging；
Step 4: additional oblique angle: 30 ° of bevel angle α is set with the contact site of thin plate 1 in the inwall of hole flanging structure 2；
Step 5: annealing: the thin plate 1 after hole flanging is made annealing treatment；
Step 6: tapping: tapping on the inwall of hole flanging, make the inwall of hole flanging be provided with screw thread.
It is 3.8～4.5n m by the moment of torsion that the present embodiment draws.
In the present invention in order to be able to improve hole flanging height, thus creativeness propose new punching flange hole technology, at this
In bright punching flange hole technology, increased the setting of boss mechanism, flange hole technology of the present invention referring specifically to Fig. 7,8, in accompanying drawing 7
In, first sheet stamping is gone out boss structure, be then punched pre-manufactured hole on boss structure again, then carry out hole flanging again, punching
The diameter of waste material f afterwards is identical with the diameter of pre-manufactured hole；Pre-manufactured hole both sides during the hole flanging of the present invention, in boss mechanism
Plate a0 then flow at hole wall during hole flanging, i.e. plate b0；And contrast Fig. 9 and Fig. 7, Figure 10 and Fig. 8, it is possible to find, this
The diameter of the waste material f being punched in invention blanking process is less than the waste material e be punched in prior art, therefore, the face of plate a0
The long-pending area more than plate a, thus leading to the plate b0 at the hole wall of final hole flanging to be more than plate b, so that hole flanging of the present invention
The height of the hole wall after technique hole flanging be greater than hole flanging of the prior art after hole wall height so that after tapping, the present invention
Many threads on the hole wall of flange hole technology increase, and improve the degree of engagement at hole flanging；And it is spaced by screw thread and thread height
Setting so that present invention process preparation hole flanging structure can bear larger moment of torsion.
The present invention breaks the normal procedure the theory of hole flanging helicitic texture and its preparation technology, by punching press boss knot first on thin plate
Structure, is then punched pre-manufactured hole on the basis of boss structure again, then carries out hole flanging, tapping operation again.Due to boss structure
Arrange so that thin-slab structure is thinning, compared with the situation that pre-manufactured hole is originally directly punched on thin plate, the material that pre-manufactured hole removes
Reduce, so that there being more materials equably can flow to the height component of hole flanging during hole flanging, thus carrying on boss
High hole flanging height, beneficial to increase ridge number during tapping；And after hole flanging, material is made annealing treatment, make material
Material release stress, increases material ductility and toughness, prevents hole flanging rear flange cracking, simultaneously in this operating process,
The aperture of pre-manufactured hole can be effectively reduced, and so that diameter during hole flanging is diminished, so that the contact-ratio of the screw thread on hole flanging structure increases
Greatly.The moment of torsion of this hole flanging helicitic texture is big, can bear the connection of high torque.Turned over using multi-ring in the range of hole flanging power allows
Hole punch carries out hole flanging to boss structure, enables the material of thin plate uniformly to flow to hole flanging flange portion, further ensures
The height of hole flanging flange.After hole flanging, add oblique angle in the inwall of hole flanging structure with the contact site of thin plate, prevent thin plate hole flanging from attacking
Tooth is screwed on after screw and nut, and the root of hole flanging deforms, thus improving the performance of product.
Finally illustrate, above example only in order to technical scheme to be described and unrestricted, although by upper
State preferred embodiment the present invention to be described in detail, it is to be understood by those skilled in the art that can be in form
Above and various changes are made to it, without departing from claims of the present invention limited range in details.
Claims (4)
1. a kind of preparation technology of the hole flanging helicitic texture of thin plate is it is characterised in that comprise the steps of:
Step 1: punching press boss structure: need one height of position punching press of hole flanging boss between 0.4～1.5mm in thin plate
Structure, and the diameter of boss structure is less than the diameter of required hole flanging；
Step 2: pre-manufactured hole punching: be punched pre-manufactured hole in the center of boss structure；
Step 3: hole flanging: according to the computing formula fn=1.1 π t σ of hole flanging powerδ(r-p) calculate required power during hole flanging, wherein,
Fn hole flanging power, σδYield point, the diameter of r hole flanging, the prefabricated bore dia of p, t material thickness；In step 2 punching molding
Pre-manufactured hole position, hole flanging is carried out to boss structure in the range of hole flanging power using multi-ring Burring Punch, make hole wall perpendicular to
Thin plate, and stamp out the height needed for hole flanging；
Step 4: additional oblique angle: bevel angle α is set with the contact site of thin plate in the inwall of hole flanging structure；
Step 5: annealing: the thin plate after hole flanging is made annealing treatment；
Step 6: tapping: tapping on the inwall of hole flanging, make the inwall of hole flanging be provided with screw thread.
2. a kind of hole flanging helicitic texture of thin plate according to claim 1 preparation technology it is characterised in that: in step 1,
The height of boss structure is 0.2～1.2mm.
3. a kind of hole flanging helicitic texture of thin plate according to claim 1 preparation technology it is characterised in that: in step 2,
The diameter of pre-manufactured hole is in the range of 0.4～1.5mm.
4. a kind of hole flanging helicitic texture of thin plate according to claim 1 preparation technology it is characterised in that: in step 3,
Described multi-ring Burring Punch includes annular punch and installation portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610036098.5A CN105500010B (en) | 2016-01-20 | 2016-01-20 | Hole-flanged threaded structure of thin plate and making process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610036098.5A CN105500010B (en) | 2016-01-20 | 2016-01-20 | Hole-flanged threaded structure of thin plate and making process thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN105500010A CN105500010A (en) | 2016-04-20 |
| CN105500010B true CN105500010B (en) | 2017-01-18 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2251994A7 (en) * | 1973-11-19 | 1975-06-13 | Sdg Sarl | Machine for mfg. garden sprinkler outlet tubes - pushes edges of drilled holes inwards before tapping to receive nozzles |
| US6220818B1 (en) * | 1997-10-21 | 2001-04-24 | Beckett Air Incorporated | Blower wheel assembly with steel hub, and method of making same |
| KR20060028474A (en) * | 2006-03-10 | 2006-03-29 | 박상봉 | The combination structure of coupling boss and plate |
| CN100415404C (en) * | 2006-08-17 | 2008-09-03 | 徐剑光 | Forming processing technics for stainless steel flume |
| CN104554482B (en) * | 2014-12-10 | 2017-02-22 | 浙江奔克汽车部件有限公司 | Machining process of auxiliary mounting piece used for mounting automobile lateral pedal |
| CN204878246U (en) * | 2015-08-07 | 2015-12-16 | 上海永太汽车零部件厂 | Multicavity room sheet metal nut |
| CN204828234U (en) * | 2015-08-07 | 2015-12-02 | 上海永太汽车零部件厂 | Single cavate sheet metal nut |
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