CN102240908B - Automatic forming and welding equipment and method of increaser pipe fitting - Google Patents
Automatic forming and welding equipment and method of increaser pipe fitting Download PDFInfo
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- CN102240908B CN102240908B CN201110147969.8A CN201110147969A CN102240908B CN 102240908 B CN102240908 B CN 102240908B CN 201110147969 A CN201110147969 A CN 201110147969A CN 102240908 B CN102240908 B CN 102240908B
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Abstract
The invention belongs to the technical field of pipe fitting processing and relates to automatic forming and welding equipment and method of metal increaser pipe fitting. The automatic forming and welding equipment of the increaser pipe fitting comprises a forming mold, a hydraulic press pedestal which is used for fixing the forming mold and an argon-arc welding set which can realize automatic welding under the driving of a cylinder. The forming mold comprises a mold cavity, a mold core, a mold core shaft and a side mold; the mold cavity is fixed on the hydraulic press pedestal; a hydraulic press component which is used for driving the side mold and the mold core to form a thin-wall sheet material into an increaser pipe fitting semi-finished product is arranged on the hydraulic press pedestal. When the equipment is used, by only putting a stamped sheet material into the mold cavity, following two key processes, i.e. forming and welding, are automatically finished, then the semi-finished product is taken out, and materials are continuously put for circulatory production, thus the time for forming and welding products is greatly shortened.
Description
Technical field
The invention belongs to the pipe fitting processing technique field, relate to a kind of automatic equipment and method of metal reducing joint pipe fitting moulding welding.
Background technology
On the method for the metal reducing joint pipe fitting of manufacturing uniform wall thickness, basically adopt the technique of thin-walled plate shaping welding at present.Traditional method is: blanking, offhand, manual welding, shaping, scarfing, surface treatment 6 procedures, wherein moulding, weld the quality that this 2 procedure directly determines product.Yet manual moulding and the artificial welding production product out of beaing of this employing, have relatively high expectations to workman's technical merit, and labor intensive is many, and the yields of product is low, and the production time is long, is unfavorable for producing in enormous quantities.
Summary of the invention
The invention provides a kind of succinct, efficient, stable reducing joint pipe fitting automatic moulding welding equipment, utilize the product of this device fabrication, size Control puts in place, and wall thickness is even, qualification rate is high, has solved the waste of manpower of existing traditional handicraft, the characteristics of waste raw material, unstable product quality.
The present invention also provides a kind of method of utilizing described welding equipment to carry out the welding of reducing joint pipe fitting automatic moulding.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals:
A kind of reducing joint pipe fitting automatic moulding welding equipment, comprise the hydraulic press pedestal of mould, fixed-type mould and can realize the argon arc welding welder of automatic welding by air cylinder driven, mould comprises die cavity, core rod, core rod axle and side form, die cavity is fixed on the hydraulic press pedestal, on the hydraulic press pedestal, is equipped with for driving side form and core rod to realize the thin-walled plate is molded into to the half-finished hydraulic press assembly of reducing fittings.The hydraulic press main cylinder piston-rod promotes cylinder bracket and moves up and down, and oil cylinder is fixed on an end of cylinder bracket, and the side cylinder piston rod of both sides connects into mould-side form, and the side cylinder piston rod promotes side form and does side-to-side movement, and the hydraulic press pedestal is connected with mould-die cavity.In use, plate that only need to punching press is good is placed in die cavity this equipment, moulding afterwards, welds 2 road critical processes and automatically completes, and then half product is taken out, and continues the blowing production that circulates, and has greatly shortened moulding and the weld interval of product.
As preferably, described hydraulic press assembly comprises hydraulic press master cylinder, oil cylinder and hydraulic pressure pusher side cylinder, for driving side form to coordinate with core rod, realize the thin-walled plate is molded into to the both sides that the half-finished hydraulic pressure pusher side of reducing fittings cylinder symmetry is installed on the hydraulic press pedestal for two, the piston rod of hydraulic pressure pusher side cylinder is connected with side form.
As preferably, the piston rod of described hydraulic press master cylinder is connected with cylinder bracket, cylinder bracket is inverted L-shaped, cylinder bracket is equipped with oil cylinder and argon arc welding welder, the piston rod of oil cylinder is hinged by an end of movable rod and core rod axle, the other end and the cylinder bracket of core rod axle are hinged, and described core rod is enclosed within on the core rod axle.
As preferably, described argon arc welding welder comprises vertical Rodless cylinder, Rodless cylinder, welding gun fixed mount, angle adjusting support and welding gun, angle adjusting support one end is fixedly connected with the slide unit of vertical Rodless cylinder, the angle adjusting support other end and Rodless cylinder are flexibly connected, and welding gun is fixed on the slide unit of Rodless cylinder by the welding gun fixed mount.Welding gun is fixed on the welding gun fixed mount, and the welding gun fixed mount is arranged on also can be along the guide rod side-to-side movement of Rodless cylinder on Rodless cylinder; Rodless cylinder is movably fixed on angle adjusting support, by parbuckle screw, can allow Rodless cylinder become 0 °～45 ° angles with horizontal plane, and then makes welding gun and need solder side vertical, and angle adjusting support is arranged on vertical Rodless cylinder, can move up and down along guide rod.
As preferably, described die cavity is fixed on the hydraulic press pedestal by base plate.
As preferably, die cavity both sides along continuous straight runs is provided with T-slot, the middle part of die cavity is provided with for placing the core rod groove of core rod, core rod groove coaxial direction is provided with core rod axle holddown groove, the upper surface of die cavity is provided with the plate groove matched with the Sheet metal development size dimension of reducing fittings product to be processed, and the axis of T-slot and core rod groove is perpendicular.
As preferably, the left and right side form is the left-right symmetry structure, and the side form bottom is provided with T shape piece, and T shape piece coordinates with the T-slot of die cavity, side form is provided with the cambered surface consistent with reducing fittings product radian to be processed, on side form 7, also be provided with core rod on the soldering opening direction and the welding groove of position consistency.
As preferably, core rod is the circular cone shape of hollow, and its shape matches with the size and dimension of reducing fittings product to be processed, and core rod stub end bottom is provided with a ring shape edge; The core rod axle is provided with flat key and makes on core rod to have one of soldering opening and face up fixingly, and core rod has the flat key groove with respect to the position of flat key.The core rod axle is provided with flat key, and the core rod direction of principal axis is fixed.The little head end of core rod axle can be connected by pin with cylinder bracket, fix an end by the pin fulcrum and do lever motion, the core rod axle other end (stub end) is connected with cylinder piston rod by movable rod, reciprocating motion by oil cylinder piston moves up and down, mould-side form is connected with hydraulic pressure pusher side cylinder piston rod, by the reciprocating motion of side cylinder piston, does side-to-side movement.Further preferably, the thickness of the thickness on the annular edge on core rod >=reducing fittings product to be processed.
A kind of method of utilizing described welding equipment to carry out the welding of reducing joint pipe fitting automatic moulding, is characterized in that comprising the steps:
The mould that a, preparation match with reducing fittings product to be processed, die cavity in mould is arranged on the hydraulic press pedestal, side form is arranged on the side cylinder piston rod, core rod is enclosed within on the core rod axle, the fixed die mandrel, the end that fastening core rod axle is connected with movable rod simultaneously;
The angle of b, adjusting Rodless cylinder and angle adjusting support, make welding gun vertical with solder side;
C, by punching press, good plate is placed on die cavity;
D, hydraulic press Component driver side form and core rod are realized the thin-walled plate is molded into to the reducing fittings semi-finished product;
On e, argon arc welding welder, the reducing fittings semi-finished product are welded, obtained product.
Therefore, with existing moulding welding manual mode of operation, compare, the advantage of this reducing joint pipe fitting automatic moulding welding equipment is:
1, this device structure is simple, and cost is low, realizes that the driving member of automatic operation and electric original paper are all the most frequently used.
2, easy and simple to handle, do not need professional technique that the operator is higher can complete the moulding welding operation of pipe fitting.
3, the pipe fitting yield rate by this equipment making is very high, can save a large amount of costs of raw material and artificial.
4, the reducing fittings size Control of this equipment making is more accurate, and wall thickness is even, and owing to being the equipment automatic welding, the quality of solder side is guaranteed.
The accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present invention.
Fig. 2 is left view of the present invention.
Fig. 3 is right view of the present invention.
Fig. 4 is the positive perspective view that the present invention removes the hydraulic press master cylinder.
Fig. 5 is the back perspective view that the present invention removes the hydraulic press master cylinder.
Fig. 6 is argon arc welding welder Facad structure schematic diagram of the present invention.
Fig. 7 is argon arc welding welder of the present invention back structural representation.
Fig. 8 is the perspective view of core rod of the present invention.
Fig. 9 is the plan structure schematic diagram of core rod of the present invention.
Figure 10 is the perspective view of die cavity of the present invention.
Figure 11 is the plan structure schematic diagram of die cavity of the present invention.
Figure 12 is the left TV structure schematic diagram of die cavity of the present invention.
Figure 13 is the perspective view of side form of the present invention.
Figure 14 is the plan structure schematic diagram of side form of the present invention.
Figure 15 is the Facad structure schematic diagram of side form of the present invention.
Figure 16 is the plate blanking shape schematic diagram of the present invention's reducing fittings product to be processed.
Figure 17 is the combining structure schematic diagram of mould of the present invention before plate shaping.
Figure 18 is the combining structure schematic diagram of mould of the present invention after plate shaping.
Figure 19 is the combining structure schematic diagram of mould of the present invention after the welding of reducing fittings semi-finished product.
Label declaration: hydraulic press pedestal 1, hydraulic pressure pusher side cylinder 2, hydraulic press master cylinder 3, oil cylinder 4, die cavity 6, side form 7, core rod 8, core rod axle 9, cylinder bracket 10, base plate 11, vertical Rodless cylinder 12, Rodless cylinder 13, angle adjusting support 14, welding gun 15, welding gun fixed mount 16, movable rod 17, trip bolt 18, slack adjuster 19, oil cylinder pin 20, pin 21, movable rod pin 22, T-slot 61, core rod groove 62, plate groove 63, core rod axle holddown groove 64, T shape piece 71, cambered surface 72, welding groove 73, soldering opening 81, flat key groove 82, annular is along 83.
The specific embodiment
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
The technology of using in following examples, unless stated otherwise, be routine techniques known to those skilled in the art; The instrument and equipment used, reagent etc., this specification special instruction only, be that the research of this area and technical staff can be by public approach acquisition.
Embodiment:
A kind of reducing joint pipe fitting automatic moulding welding equipment as shown in Figure 1, Figure 2 and Figure 3, comprise the hydraulic press pedestal 1 of mould, fixed-type mould and can realize the argon arc welding welder of automatic welding by air cylinder driven, mould comprises die cavity 6, core rod 8, core rod axle 9 and side form 7, die cavity is fixed on hydraulic press pedestal 1, on hydraulic press pedestal 1, is equipped with for driving side form 7 and core rod to realize the thin-walled plate is molded into to the half-finished hydraulic press assembly of reducing fittings.The hydraulic press assembly comprises that hydraulic press master cylinder 3, oil cylinder 4 and 2, two hydraulic pressure pusher side cylinder 2 symmetries of hydraulic pressure pusher side cylinder are installed on the both sides of hydraulic press pedestal, and the piston rod of hydraulic pressure pusher side cylinder is connected with side form.Hydraulic pressure pusher side cylinder is realized the thin-walled plate is molded into to the half-finished process of reducing fittings for driving side form to coordinate with core rod.The piston rod of hydraulic press master cylinder 3 is connected with cylinder bracket 10, cylinder bracket is inverted L-shaped, cylinder bracket is equipped with oil cylinder 4 and argon arc welding welder, between oil cylinder 4 and cylinder bracket 10, by oil cylinder pin 20, be connected, the piston rod of oil cylinder 4 is hinged with an end of core rod axle by movable rod 17, and the other end and the cylinder bracket of core rod axle are hinged.Between core rod axle 9 and movable rod 17, by movable rod pin 22, be connected.
As shown in Figure 4 and Figure 5, the die cavity 6 of mould is fixed on the hydraulic press pedestal by base plate 11.As shown in Figure 10, Figure 11 and Figure 12, die cavity 6 both sides along continuous straight runs are provided with T-slot 61, the middle part of die cavity 6 is provided with for placing the core rod groove 62 of core rod, core rod groove coaxial direction is provided with core rod axle holddown groove 64, the upper surface of die cavity is provided with the plate groove 63 matched with the plate tiling size dimension of reducing fittings product to be processed, and the axis of T-slot and core rod groove is perpendicular.
Core rod 8 is the circular cone shape of hollow, and its shape matches with the size and dimension of reducing fittings product to be processed, and core rod 8 stub end bottoms are provided with a ring shape along 83, and the thickness on annular edge equals the thickness of reducing fittings product to be processed; Core rod 8 is nested with on core rod axle 9, core rod axle 9 is provided with flat key and makes on core rod to have one of soldering opening 81 and face up fixing, core rod 8 has flat key groove 82(corresponding to the position of flat key and sees Fig. 8 and Fig. 9), core rod axle microcephaly one end is by pin 21 and cylinder bracket 10 bottom-hinged, pin fixed die mandrel end makes it to do the lever motion of rotating up and down, pin ends is provided with one section screw thread, can take out and pin for suppressing metal by manual degree of tightness.The other end of core rod axle 9 (stub end) is connected with oil cylinder 4 piston rods by movable rod 17, and core rod axle 9 moves up and down by the reciprocating motion of oil cylinder 4 pistons.Mould before plate shaping, after moulding and the combining structure schematic diagram after reducing fittings semi-finished product welding respectively as shown in Figure 17, Figure 18 and Figure 19.
As shown in Fig. 7 and Fig. 6, argon arc welding welder by being fixed on vertical Rodless cylinder 12 on cylinder bracket 10, be arranged on the angle adjusting support 14 on vertical Rodless cylinder 12, Rodless cylinder 13, welding gun 15 and the welding gun fixed mount 16 be fixed on angle adjusting support forms.Welding gun fixed mount 16 is arranged on the slide unit of Rodless cylinder 13, and welding gun is fixed on welding gun fixed mount 16 and is vertical with Rodless cylinder 13.Rodless cylinder 13 is fixed on angle adjusting support by trip bolt 18, manual adjustments slack adjuster 19 can be regulated the angle (be adjusted to Rodless cylinder is parallel with solder side to be got final product) of Rodless cylinder 13 and horizontal plane, and the welding gun that makes to be fixed on Rodless cylinder 13 is vertical with solder side.
The vertically reciprocating motion of Rodless cylinder 12 pistons, drive argon arc welding welder to move up and down; The reciprocating motion of Rodless cylinder 13 pistons, drive welding gun moving linearly on the track perpendicular to solder side, by regulating the air pressure size of Rodless cylinder 13 air inlets, can control the speed of welding gun welding.Rodless cylinder is made buffered by lubricating oil, and the motion that can guarantee welding gun is at the uniform velocity, and then guarantees that the quality of welding reaches requirement.
utilize the method for device fabrication pipe fitting of the present invention as follows:
The Australia's mark stainless steel reducing joint pipe fitting of producing AS100/50 of take is example, adopts the thick corrosion resistant plate of 1.5mm.
Step 1, select the mould of AS100/50, die cavity is arranged on the hydraulic press pedestal, side form is arranged on the side cylinder piston rod, core rod is enclosed within on the core rod axle, pin for suppressing metal fixed die mandrel, the movable rod pin 22 that the fastening core rod axle other end is connected with movable rod simultaneously, make it to be connected with cylinder piston rod.
Step 2, unclamp slack adjuster on angle adjusting support (when the angle of Rodless cylinder 13 and angle adjusting support is 14.3 ° as calculated, can make the welding gun vertical with solder side), regulating Rodless cylinder 13 is 14.3 ° with the angle of angle adjusting support, then tightens slack adjuster.
Step 3, by punching press, good plate is placed in the plate groove on die cavity.
Step 4, starting device power supply, then press automatic button, and now equipment enters automatic running status, and concrete action is as follows:
1, the hydraulic press master cylinder is descending, and after moving to the die cavity certain distance, master cylinder stops.
2, oil cylinder starts, and promotes movable rod downwards and makes core rod face contact plate, and plate is pressed in die cavity, and after entering die cavity fully to core rod, oil cylinder stops.
3, hydraulic pressure pusher side cylinder starts, and from both sides by side form, slowly pushes the center die cavity to, and plate is shifted onto core rod by side form and tightened hard-pressed bale in core surface.After the complete matched moulds of side form, hydraulic pressure pusher side cylinder stops.
4, vertically Rodless cylinder 12 starts, and promotes argon arc welding welder and moves downward, and to behind the position of die cavity, vertically Rodless cylinder 12 stops.
5, Rodless cylinder 13 starts, and promotes the welding gun weld-end fittings.After having welded, Rodless cylinder 13 stops.
6, vertically Rodless cylinder 12 starts, and promotes argon arc welding welder and moves upward, and to original initial position, vertically Rodless cylinder 12 stops.
7, Rodless cylinder 13 starts, and after the promotion welding gun is back to initial position, Rodless cylinder 13 stops, and the side cylinder starts simultaneously, and after making side form be back to initial position, the side cylinder stops.
8, oil cylinder starts, and after pulling movable rod to make the core rod axle move to initial position, oil cylinder stops.
9, the hydraulic press master cylinder starts, and upstroke is to initial position, and the hydraulic press master cylinder stops.Now auto state finishes.
Step 5, manually unclamp pin, from core rod axle microcephaly, hold and take out the complete pipe fitting of molded welding, then the core rod axle is mounted to the cylinder bracket specified location, the pin screw screw thread of packing into.Now 1 moulding of product welding is complete.
The advantage of this reducing joint pipe fitting automatic moulding welding equipment is:
1, this device structure is simple, and cost is low, realizes that the driving member of automatic operation and electric original paper are all the most frequently used.
2, easy and simple to handle, do not need professional technique that the operator is higher can complete the moulding welding operation of pipe fitting.
3, the pipe fitting yield rate by this equipment making is very high, can save a large amount of costs of raw material and artificial.
4, the reducing fittings size Control of this equipment making is more accurate, and wall thickness is even, and owing to being the equipment automatic welding, the quality of solder side is guaranteed.It is that the moulding welding of metal reducing joint pipe fitting preferably of the plasticity such as copper, iron is manufactured that the present invention also is applicable to material.
Should be understood that this embodiment only is not used in and limits the scope of the invention for the present invention is described.The thickness that is greater than reducing fittings product to be processed as the thickness on the annular edge on core rod can be realized the object of the invention equally, and annular, along being preferred version, can not arrange yet.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Claims (5)
1. a reducing joint pipe fitting automatic moulding welding equipment, it is characterized in that: comprise the hydraulic press pedestal (1) of mould, fixed-type mould and can realize the argon arc welding welder of automatic welding by air cylinder driven, mould comprises die cavity, core rod, core rod axle and side form (7), it is upper that die cavity is fixed on hydraulic press pedestal (1), on the hydraulic press pedestal, is equipped with for driving side form and core rod to realize the thin-walled plate is molded into to the half-finished hydraulic press assembly of reducing fittings;
Die cavity both sides along continuous straight runs is provided with T-slot (61), the middle part of die cavity is provided with for placing the core rod groove (62) of core rod, core rod groove coaxial direction is provided with core rod axle holddown groove (64), the upper surface of die cavity is provided with the plate groove (63) matched with the Sheet metal development size dimension of reducing fittings product to be processed, and the axis of T-slot and core rod groove is perpendicular;
The left and right side form is the left-right symmetry structure, side form (7) bottom is provided with T shape piece (71), T shape piece coordinates with the T-slot (61) of die cavity, side form is provided with the cambered surface (72) consistent with reducing fittings product radian to be processed, on side form 7, also be provided with core rod on the soldering opening direction and the welding groove (73) of position consistency;
Core rod is the circular cone shape of hollow, and its shape matches with the size and dimension of reducing fittings product to be processed, and core rod stub end bottom is provided with a ring shape along (83); Core rod axle (9) is provided with flat key and makes on core rod to have one of soldering opening (81) and face up fixingly, and core rod has flat key groove (82) with respect to the position of flat key;
Described hydraulic press assembly comprises hydraulic press master cylinder (3), oil cylinder (4) and hydraulic pressure pusher side cylinder (2), for driving side form to coordinate with core rod, realize the thin-walled plate is molded into to the both sides that the half-finished hydraulic pressure pusher side of reducing fittings cylinder (2) symmetry is installed on the hydraulic press pedestal for two, the piston rod of hydraulic pressure pusher side cylinder is connected with side form; The piston rod of described hydraulic press master cylinder (3) is connected with cylinder bracket (10), cylinder bracket is inverted L-shaped, cylinder bracket is equipped with oil cylinder (4) and argon arc welding welder, the piston rod of oil cylinder (4) is hinged with an end of core rod axle by movable rod (17), the other end and the cylinder bracket of core rod axle are hinged, and described core rod is enclosed within on the core rod axle.
2. reducing joint pipe fitting automatic moulding welding equipment according to claim 1, it is characterized in that: described argon arc welding welder comprises vertical Rodless cylinder (12), Rodless cylinder (13), welding gun fixed mount (16), angle adjusting support (14) and welding gun (15), angle adjusting support one end is fixedly connected with the slide unit of vertical Rodless cylinder, the angle adjusting support other end and Rodless cylinder are flexibly connected, and welding gun is fixed on the slide unit of Rodless cylinder by the welding gun fixed mount.
3. reducing joint pipe fitting automatic moulding welding equipment according to claim 1 and 2, it is characterized in that: described die cavity is fixed on the hydraulic press pedestal by base plate (11).
4. reducing joint pipe fitting automatic moulding welding equipment according to claim 1 is characterized in that:
The thickness of the thickness on the annular edge on core rod >=reducing fittings product to be processed.
5. a method of utilizing welding equipment claimed in claim 1 to carry out the welding of reducing joint pipe fitting automatic moulding, is characterized in that comprising the steps:
The mould that a, preparation match with reducing fittings product to be processed, die cavity in mould is arranged on the hydraulic press pedestal, side form is arranged on the side cylinder piston rod, core rod is enclosed within on the core rod axle, the fixed die mandrel, the end that fastening core rod axle is connected with movable rod simultaneously;
The angle of b, adjusting Rodless cylinder (13) and angle adjusting support, make welding gun vertical with solder side;
C, by punching press, good plate is placed on die cavity;
D, hydraulic press Component driver side form and core rod are realized the thin-walled plate is molded into to the reducing fittings semi-finished product;
On e, argon arc welding welder, the reducing fittings semi-finished product are welded, obtained product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110147969.8A CN102240908B (en) | 2011-06-03 | 2011-06-03 | Automatic forming and welding equipment and method of increaser pipe fitting |
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|---|---|---|---|
| CN201110147969.8A CN102240908B (en) | 2011-06-03 | 2011-06-03 | Automatic forming and welding equipment and method of increaser pipe fitting |
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| CN102240908A CN102240908A (en) | 2011-11-16 |
| CN102240908B true CN102240908B (en) | 2014-01-08 |
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| CN201110147969.8A Expired - Fee Related CN102240908B (en) | 2011-06-03 | 2011-06-03 | Automatic forming and welding equipment and method of increaser pipe fitting |
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| CN102593688B (en) * | 2012-03-19 | 2014-07-16 | 辽宁省电力有限公司抚顺供电公司 | Portable welding device for communication coaxial cable joint |
| CN104015059B (en) * | 2013-03-01 | 2016-05-11 | 山东亿福金业珠宝首饰有限公司 | Two ends are with the chain link making apparatus of hanger |
| CN103465031B (en) * | 2013-09-23 | 2016-08-10 | 苏州市环宇汽车配件有限公司 | The molding welder of silencer casing |
| CN103624549A (en) * | 2013-11-07 | 2014-03-12 | 中冶陕压重工设备有限公司 | Method for conducting curving and correction of truncated cone by using press machine |
| CN103604014A (en) * | 2013-11-14 | 2014-02-26 | 上海沈达空调配件厂（普通合伙） | Reducing pipe fitting and manufacturing method thereof |
| CN103753226B (en) * | 2014-02-13 | 2016-08-17 | 安庆市江城冶金机械有限公司 | A kind of pipe joint forming machine |
| CN105562955A (en) * | 2016-02-14 | 2016-05-11 | 赵子宁 | Automatic welding device for corrugated web plates |
| CN114769434A (en) * | 2022-03-24 | 2022-07-22 | 日照兴业汽车配件股份有限公司 | Forming die and using method thereof |
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| Publication number | Publication date |
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| CN102240908A (en) | 2011-11-16 |
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