CN101723039A - Front triangular binding head and rear triangular binding head of damping bicycle stand, production technology thereof and die - Google Patents
Front triangular binding head and rear triangular binding head of damping bicycle stand, production technology thereof and die Download PDFInfo
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- CN101723039A CN101723039A CN200910259853A CN200910259853A CN101723039A CN 101723039 A CN101723039 A CN 101723039A CN 200910259853 A CN200910259853 A CN 200910259853A CN 200910259853 A CN200910259853 A CN 200910259853A CN 101723039 A CN101723039 A CN 101723039A
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Abstract
The invention discloses a front triangular binding head and a rear triangular binding head of a damping bicycle stand, a production technology thereof and a die. The binding head is once extruded and shaped by magnesium alloy; the manufacturing die comprises a lower die assembly, an upper die assembly and an external die assembly, wherein the lower die assembly comprises a lower template, an inner core, a lower die and a lower heating jacket, the inner core is arranged in the lower die, the lower die is arranged in the lower heating jacket, and the lower heating jacket and the lower template are fixed by screws; the upper die assembly comprises an upper template, a die shank and an upper die, wherein the die shank is inserted in the upper template from bottom to top; the external die assembly comprises an external die and an upper heating jacket, wherein the upper heating jacket is sheathed on the external side surface of the external die and is fixed with the template by screws, and the upper part of the upper die successively extrudes out of the external die and the die shank from bottom to top. The invention adopts the mould with a sealed cavity to once extrude and shape to manufacture the binding head; in the extrusion and shaping process, raw materials bear three-dimensional pressure stress, which is favourable for plastic deformation and improving mechanical property; after extrusion and shaping, no machining operation is needed, thus improving product quality and production efficiency, and lowering cost.
Description
Technical field
The present invention relates to bicycle rack, be specifically related to forward and backward three corner joints and the manufacturing process and the mould of damping bicycle stand.
Background technology
Bicycle is a kind of not only economy but also the vehicle, every nook and cranny all over the world at present easily.Along with the continuous progress of science and technology, the widespread use of new materials such as various novel damping structures and magnesium alloy makes the performance of bicycle be greatly improved, and various performance-oriented damping bicycles occurred.
Damping bicycle stand is the critical component of damping bicycle, generally is made up of two main portions of preceding trigonometric sum Vee formation, and wherein preceding triangle is mainly used in and supports front-wheel and handle, and Vee formation is mainly used to support trailing wheel.It is several mainly to be divided into hard tail bicycle rack, soft tail bicycle rack and full suspension bike frame etc. according to its concrete structure.Vee formation does not have shock absorption device, directly the bicycle rack that is welded with metal pipe material is called hard tail bicycle rack, this bicycle rack has in light weight, there is not advantages such as scrunching loss, and price is also relatively cheap, but because the damping degree of Vee formation is poor, trailing wheel stability is not high when therefore travelling with higher speed on more rugged road surface, even trailing wheel may occur and run built on stilts and cause phenomenon out of control.The full suspension bike frame has fully independently shock-damping structure and miscellaneous bumper, has good damping effect, but costs an arm and a leg, and maintenance cost is higher.Soft tail bicycle rack is a kind of bicycle rack between hard tail bicycle rack and full suspension bike frame, realize the effect of similar rear shock absorber by the passive damping structure, this bicycle rack has traveling comfort and moderate cost preferably, therefore becomes the main flow of current damping bicycle stand.
The main material of present high-grade damping bicycle stand is a magnesium alloy.Fig. 1 is a kind of structural representation of soft tail bicycle rack, and among the figure, Vee formation 11 is provided with damping shock absorption piece 12, links together by damping connector 14 between preceding triangle 16 and the damping shock absorption piece 12, realizes damping, buffering by damping shock absorption piece 12.The structure of damping connector 14 as shown in Figure 2, comprise a columnar outer sleeve 21 and the end cap 22 that is welded on the one end, the center of end cap 22 is provided with a tapped bore 23, on the standpipe 15 of triangle 16, end cap 22 linked together this connector 14 by bolt 13 with damping shock absorption piece 12 before one end of outer sleeve 21 was welded on.For the magnesium alloy connector, because the plasticity of magnesium alloy is poor, the distortion difficulty,------sawing end cap material----welding-----tapping that sawing is disconnected that the processing process of therefore existing magnesium alloy connector is: mill nock, as seen above-mentioned job operation complex process, difficulty of processing is big, particularly when milling the arc groove of outer sleeve, because outer sleeve is shorter, can't clamping on milling machine, must be at first go out the nock that matches with middle pipe at an end mill of an oval pipe, to mill the pipe of nock subsequently again takes on the sawing machine, size sawing according to part is welded as a whole end cap and outer sleeve at last.
By top processing process as can be seen, the processing technology complexity of existing magnesium alloy damping connector, manufacture difficulty is big.
Summary of the invention
Technical matters to be solved by this invention is the processing technology complexity that solves magnesium alloy damping connector, the problem that manufacture difficulty is big.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention provides a kind of forward and backward three corner joints of damping bicycle stand, this connector is by extrusion forming of magnesium alloy, it has the cylindric joint body of an end osed top, the open end of joint body have with bicycle rack before the suitable arc groove of external cylindrical surface of triangle standpipe, the center of closed end is provided with a tapped through hole.
As the improvement project of this connector, the center of joint body closed end inside face is provided with boss.
The present invention also provides the mfg. moulding die of above-mentioned connector, comprises membrane module, upper die component and outer membrane module down,
Described membrane module down comprises lower bolster, inner core, counterdie and following heating jacket, the top of counterdie is up-small and down-big step axle shape and step surface, the center of counterdie end face is provided with circular pit, the bottom lateral surface of counterdie is provided with first annular lip, inner core is up-small and down-big step axle shape, inner core places in the counterdie and passes the end face of counterdie on it, counterdie places down in the heating jacket and its top passes down the end face of heating jacket, and following heating jacket and lower bolster are spirally connected fixing;
Described upper die component comprises cope match-plate pattern, die shank and patrix, die shank is provided with axially extending bore and the bottom outside face is provided with second annular lip, die shank be inlaid on the cope match-plate pattern from bottom to top and the bottom surface of die shank concordant with the bottom surface of cope match-plate pattern, patrix is cylindric and the lower end is provided with the 3rd round flange, the center of patrix bottom surface be provided with the degree of depth of suitable blind hole in inner core top and blind hole with to be connected thickness of head identical;
Described outer membrane module comprises external mold and last heating jacket, the top of external mold is provided with Fourth Ring shape flange and is provided with external mold step axis hole vertically, last heating jacket is provided with the last heating jacket step through-hole suitable with the external mold lateral surface, last heating jacket is sleeved on the lateral surface of external mold and is spirally connected fixing with cope match-plate pattern, patrix top passes from external mold and die shank from bottom to top successively, the step surface of the upper surface of the 3rd round flange on the patrix and external mold step axis hole offset and the upper end of inner core and the blind hole on the patrix bottom surface over against.
In the technical scheme of above-mentioned mould, be provided with the heated at constant temperature pipe in the upper and lower heating jacket, and the heating-up temperature of heated at constant temperature pipe is 320～360 ℃.
The material of described patrix, external mold and counterdie is an alloy tool steel, and the material of upper and lower heating jacket is a dead-soft steel.
The present invention also provides the manufacturing process of above-mentioned connector, may further comprise the steps:
A10, the mfg. moulding die with forward and backward three corner joints of damping bicycle stand is installed on the hydraulic press respectively, wherein descends membrane module to be fixed on the workplatform of hydraulic press, and upper die component and outer membrane module are fixed on the hydraulic press moving slider;
A20, startup hydraulic press make moving slider rest on loading station;
Switch on respectively heating mould and be retained to 320～360 ℃ of A30, upper and lower heating jacket;
A40, will in resistance furnace, be heated to 320～360 ℃ according to the cylindric raw material magnesium alloy of connector weight blanking.
A50, the raw material magnesium alloy after will heating are sleeved on down on the inner core in the membrane module, start hydraulic press, make moving slider be displaced downwardly to the preparation station, this moment down in the membrane module top of inner core be inserted in the upper die component in the blind hole on the patrix bottom surface;
The moving slider of A60, hydraulic press continues to move down with extrusion forming of connector;
Move to unloading station on the moving slider of A70, hydraulic press, in this process, the end face of patrix offsets in the guide bar of hydraulic press and the upper die component, thereby releases external mold with the connector that moves on the cope match-plate pattern moulding.
The present invention adopts extrusion forming of mould of airtight die cavity to make connector, what raw material bore in the extrusion forming process is three-dimensional compressive stress, helps plastic deformation and improves mechanical characteristics, need not machine up behind the extrusion forming, improve product design and production efficiency, and reduced cost.
Description of drawings
Fig. 1 is existing soft tail bicycle rack structural representation;
Fig. 2 is the structural representation of forward and backward three corner joints of present damping bicycle stand;
Fig. 3 is a kind of example structure scheme drawing of forward and backward three corner joints of damping bicycle stand provided by the invention;
Fig. 4 is the forward and backward three corner joint mfg. moulding die structural representations of damping bicycle stand provided by the invention;
Fig. 5 is following membrane module decomposition texture scheme drawing;
Fig. 6 is patrix, outer membrane module decomposition texture scheme drawing.
The specific embodiment
The invention provides a kind of forward and backward three corner joints of magnesium alloy damping bicycle stand, adopt unique closed mold, an extrusion forming has been simplified production technology, has saved raw MAT'L, has reduced cost, has also improved this connector mechanical property simultaneously.Below in conjunction with the drawings and specific embodiments the present invention is made detailed explanation.
Fig. 3 is a kind of example structure scheme drawing of forward and backward three corner joints of damping bicycle stand provided by the invention, as shown in Figure 3, this connector is by extrusion forming of magnesium alloy, it has the cylindric joint body 31 of an end osed top, the open end 32 of joint body 31 have with bicycle rack before the suitable arc groove of external cylindrical surface of triangle standpipe, the center of closed end 33 is provided with tapped through hole 34 and inside face is provided with axial round boss 35.Triangle standpipe weld together before the arc groove at joint body open end 32 places and the bicycle rack, closed end 33 links together joint body 31 and damping shock absorption piece by bolt.Because the inside face of joint body closed end 33 is provided with axial round boss 35, like this, under the raw material situation identical in quality, has increased the effective length of tapped through hole, thereby has improved the Joint strenght of joint body 31.
As everyone knows, the plasticity of magnesium alloy is poor, the distortion difficulty, and therefore forward and backward three corner joints of above-mentioned damping bicycle stand need to the invention provides this mfg. moulding die by special-purpose mfg. moulding die extrusion forming, concrete structure comprises membrane module, upper die component and outer membrane module down as shown in Figure 4.
Fig. 5 is the decomposition texture scheme drawing of membrane module under this mfg. moulding die, in conjunction with Fig. 4 and shown in Figure 5, following membrane module comprises lower bolster 41, inner core 44, counterdie 43 and following heating jacket 42, inner core 44 is up-small and down-big step axle shape, counterdie 43 is provided with and the suitable step through-hole 433 of inner core 44 outer circumference surfaces vertically, inner core 44 is installed in the step through-hole 433 of counterdie 43 from bottom to top and the upper ends 441 of inner core 44 pass the end face of counterdie 43, the bottom lateral surface of counterdie 43 is provided with first annular lip 434, following heating jacket 42 is provided with and the suitable step through-hole 421 in counterdie 43 bottoms, counterdie 43 is installed on down the end face that heating jacket 42 tops interior and counterdie 43 pass down heating jacket 42 from bottom to top, the top of counterdie 43 is up-small and down-big step axle shape, the step surface 432 of this step axle is the last convex globoidal suitable with the shape of connector open end, the center of counterdie 43 end faces is provided with circular pit 431, and this circular pit 431 is used for forming the axial round boss on the closed end inside face when the connector moulding.The profile of following heating jacket 42 is square, four bights are provided with through hole, bolt of rear end plate passes above-mentioned four through holes respectively and is fixed on the upper surface of lower bolster 41, and by the step surface of step through-hole 421 counterdie 43 is pressed on the lower bolster 41, counterdie 43 is pressed on inner core 42 on the lower bolster 41 by step through-hole 433 simultaneously.Fixed form of the present invention need only be fixed down heating jacket 42 and just fixed counterdie 43 and inner core 42 simultaneously, and mould handling is very convenient, has improved production efficiency greatly.
Fig. 6 is a patrix, outer membrane module decomposition texture scheme drawing, in conjunction with Fig. 4 and Fig. 6, upper die component comprises cope match-plate pattern 45, die shank 46 and patrix 47, die shank 46 is provided with axially extending bore 461 and the bottom outside face is provided with second annular lip 462, cope match-plate pattern 45 is provided with the step through-hole 451 suitable with the lateral surface of die shank 46, die shank 46 be installed in the step through-hole 451 of cope match-plate pattern 45 from bottom to top and the bottom surfaces of die shank 45 concordant with the bottom surface of cope match-plate pattern 45, patrix 47 is cylindric and the lower end is provided with the 3rd round flange 471, the center of patrix 47 bottom surfaces is provided with and the suitable blind hole 472 in inner core 42 tops, the degree of depth of blind hole 472 is identical with the connection thickness of head, and promptly the miles of relative movement of inner core 42 in blind hole 472 equals the stroke of crimp connection head.Outer membrane module comprises external mold 50 and last heating jacket 48, the top of external mold 50 is provided with Fourth Ring shape flange 501 and is provided with up-small and down-big external mold step axis hole 502 vertically, last heating jacket 48 is provided with the last heating jacket step through-hole 481 suitable with external mold 52 lateral surfaces, last heating jacket 48 is square, its four bights are respectively equipped with through hole, last heating jacket 48 is sleeved on the lateral surface of external mold 50 and by four bolt of rear end plates and is fixed on the bottom surface of cope match-plate pattern 45, patrix 47 tops pass from external mold 50 and die shank 46 from bottom to top successively, the step surface of the upper surface of the 3rd round flange 471 on the patrix 47 and external mold step axis hole 502 offset and the upper end of inner core 42 and the blind hole 471 on patrix 47 bottom surfaces over against.The upper end of die shank 45 is used for the slide block of clamping at hydraulic press; in the process of extrusion forming; the top of inner core 42 can move up and down along the blind hole on the patrix 47 471; play the effect of guiding on the one hand; also play spacing effect on the other hand; promptly when the hydraulic press extruding puts in place; the end face of inner core 42 just with patrix 47 on the bottom surface of blind hole 471 offset; like this; the pressure of hydraulic press is just carried and is passed to the workplatform of hydraulic press by inner core 42, thereby the connector of protection moulding no longer bears pressure.
Be respectively equipped with heated at constant temperature pipe 49 in the upper and lower heating jacket 48,42, and the heating-up temperature of heated at constant temperature pipe 49 is 320～360 ℃.Because magnesium alloy plasticity is relatively poor, therefore in the whole crumpling process, raw material must remain on 320～360 ℃ by constant temperature, by upper and lower heating jacket 48,42 with 50 heating of counterdie 43 and external mold and keep constant temperature, thereby guaranteed the yield rate of magnesium alloy connector extrusion forming.
In above-mentioned mfg. moulding die; the material of patrix 47, external mold 50 and counterdie 43 is an alloy tool steel; chromium steel for example; because their main effect is an extrusion magnesium alloy; therefore choose the material of high hardness; yet; the fragility of high hardness material is bigger; ftracture easily; cracking for fear of patrix 47, external mold 50 and counterdie 43; be respectively installed with upper and lower heating jacket 48,42 on the lateral surface of external mold 50 and counterdie 43, play heat effect on the one hand, also external mold 50 and counterdie 43 are played a protective role on the other hand raw material.What the material of upper and lower heating jacket 48,42 was selected for use is dead-soft steel, and dead-soft steel has good plasticity, encircles on the lateral surface of external mold 50 and counterdie 43, can play a very good protection.
The mfg. moulding die of forward and backward three corner joints of damping bicycle stand provided by the invention is rational in infrastructure, easy to loading and unloading, only needs fixing upper and lower heating jacket 48,42, and realizes the fastening fast of entire die, production efficiency height by step axle, hole respectively.
In sum, because magnesium alloy plasticity is relatively poor, utilize common forging to be difficult to moulding, mfg. moulding die provided by the invention adopts fully enclosed die cavity (being made up of upper die and lower die, external mold and inner core), what connector bore in forming process is three-dimensional compressive stress, be upper and lower and all bear all around the extruding make material be in plastic state, help plastic deformation and improve the mechanical characteristics of material, once extruding just can form the profile of needed part, need not to carry out machine up, improved product design and production efficiency.
The present invention also provides the manufacturing process of above-mentioned connector, may further comprise the steps:
A10, the mfg. moulding die with forward and backward three corner joints of damping bicycle stand is installed on the hydraulic press respectively, wherein descends membrane module to be fixed on the workplatform of hydraulic press, and upper die component and outer membrane module are fixed on the hydraulic press moving slider;
A20, startup hydraulic press make moving slider rest on loading station;
Switch on respectively heating mould and be retained to 320～360 ℃ of A30, upper and lower heating jacket;
In the time of A40, the upper and lower heating jacket of heating, will in resistance furnace, be heated to 320～360 ℃ according to the cylindric raw material magnesium alloy of connector weight blanking.
A50, the raw material magnesium alloy after will heating are sleeved on down on the inner core in the membrane module, start hydraulic press, make moving slider be displaced downwardly to the preparation station, this moment down in the membrane module top of inner core be inserted in the upper die component in the blind hole on the patrix bottom surface;
The moving slider of A60, hydraulic press continues to move down with extrusion forming of connector;
Move to unloading station on the moving slider of A70, hydraulic press, in this process, the end face of patrix offsets in the guide bar of hydraulic press and the upper die component, thereby releases external mold with the connector that moves on the cope match-plate pattern moulding.
Use mfg. moulding die provided by the invention and fabrication process magnesium alloy connector, have the following advantages:
(1) simplifies production technology, improved production efficiency, helped batch manufacturing.
(2) no cutting, raw MAT'L is saved in one-shot forming.
(3) magnesium alloy connector reasonable in design under identical Joint strenght, alleviates part weight than original product.
(4) owing to simplified production technology, saved raw MAT'L, so reduced cost.
(5) because the magnesium alloy connector is rational in infrastructure, and by extrusion forming, its part inside all is the plastic deformation tissue, and relative weldment has in the past improved the mechanical property of part.
(6) mfg. moulding die adopts the die cavity of hermetic type, and heated at constant temperature, and part is in forming process, and what bear is three-dimensional compressive stress, makes material be in plastic state, helps plastic deformation.
(7) mfg. moulding die is rational in infrastructure, the upper and lower heating jacket that need only be spirally connected, and therefore, mould handling is convenient, has improved production efficiency.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural change of making under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, all falls within protection scope of the present invention.
Claims (6)
1. forward and backward three corner joints of damping bicycle stand, it is characterized in that this connector is by extrusion forming of magnesium alloy, it has the cylindric joint body of an end osed top, the open end of joint body have with bicycle rack before the suitable arc groove of external cylindrical surface of triangle standpipe, the center of closed end is provided with a tapped through hole.
2. forward and backward three corner joints of damping bicycle stand as claimed in claim 1 is characterized in that the center of joint body closed end inside face is provided with boss.
3. the mfg. moulding die of forward and backward three corner joints of damping bicycle stand is characterized in that comprising membrane module, upper die component and outer membrane module down,
Described membrane module down comprises lower bolster, inner core, counterdie and following heating jacket, the top of counterdie is up-small and down-big step axle shape and step surface, the center of counterdie end face is provided with circular pit, the bottom lateral surface of counterdie is provided with first annular lip, inner core is up-small and down-big step axle shape, inner core places in the counterdie and passes the end face of counterdie on it, counterdie places down in the heating jacket and its top passes down the end face of heating jacket, and following heating jacket and lower bolster are spirally connected fixing;
Described upper die component comprises cope match-plate pattern, die shank and patrix, die shank is provided with axially extending bore and the bottom outside face is provided with second annular lip, die shank be inlaid on the cope match-plate pattern from bottom to top and the bottom surface of die shank concordant with the bottom surface of cope match-plate pattern, patrix is cylindric and the lower end is provided with the 3rd round flange, the center of patrix bottom surface be provided with the degree of depth of suitable blind hole in inner core top and blind hole with to be connected thickness of head identical;
Described outer membrane module comprises external mold and last heating jacket, the top of external mold is provided with Fourth Ring shape flange and is provided with external mold step axis hole vertically, last heating jacket is provided with the last heating jacket step through-hole suitable with the external mold lateral surface, last heating jacket is sleeved on the lateral surface of external mold and is spirally connected fixing with cope match-plate pattern, patrix top passes from external mold and die shank from bottom to top successively, the step surface of the upper surface of the 3rd round flange on the patrix and external mold step axis hole offset and the upper end of inner core and the blind hole on the patrix bottom surface over against.
4. the mfg. moulding die of forward and backward three corner joints of damping bicycle stand as claimed in claim 3 it is characterized in that being provided with the heated at constant temperature pipe in the upper and lower heating jacket, and the heating-up temperature of heated at constant temperature pipe is 320～360 ℃.
5. as the mfg. moulding die of forward and backward three corner joints of claim 3 or 4 described damping bicycle stands, the material that it is characterized in that described patrix, external mold and counterdie is an alloy tool steel, and the material of upper and lower heating jacket is a dead-soft steel.
6. the manufacturing process of forward and backward three corner joints of damping bicycle stand is characterized in that may further comprise the steps:
A10, the mfg. moulding die with forward and backward three corner joints of damping bicycle stand is installed on the hydraulic press respectively, wherein descends membrane module to be fixed on the workplatform of hydraulic press, and upper die component and outer membrane module are fixed on the hydraulic press moving slider;
A20, startup hydraulic press make moving slider rest on loading station;
Switch on respectively heating mould and be retained to 320～360 ℃ of A30, upper and lower heating jacket;
A40, will in resistance furnace, be heated to 320～360 ℃ according to the cylindric raw material magnesium alloy of connector weight blanking.
A50, the raw material magnesium alloy after will heating are sleeved on down on the inner core in the membrane module, start hydraulic press, make moving slider be displaced downwardly to the preparation station, this moment down in the membrane module top of inner core be inserted in the upper die component in the blind hole on the patrix bottom surface;
The moving slider of A60, hydraulic press continues to move down with extrusion forming of connector;
Move to unloading station on the moving slider of A70, hydraulic press, in this process, the end face of patrix offsets in the guide bar of hydraulic press and the upper die component, thereby releases external mold with the connector that moves on the cope match-plate pattern moulding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102598536A CN101723039B (en) | 2009-12-16 | 2009-12-16 | Front triangular binding head and rear triangular binding head of damping bicycle stand, production technology thereof and die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102598536A CN101723039B (en) | 2009-12-16 | 2009-12-16 | Front triangular binding head and rear triangular binding head of damping bicycle stand, production technology thereof and die |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101723039A true CN101723039A (en) | 2010-06-09 |
| CN101723039B CN101723039B (en) | 2011-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102598536A Expired - Fee Related CN101723039B (en) | 2009-12-16 | 2009-12-16 | Front triangular binding head and rear triangular binding head of damping bicycle stand, production technology thereof and die |
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| CN (1) | CN101723039B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102294393A (en) * | 2011-09-02 | 2011-12-28 | 昆山市友森精密机械有限公司 | Equipment and process for forming bicycle aluminum alloy upright pipe |
| CN106945776A (en) * | 2017-05-06 | 2017-07-14 | 浙江凯驰电动科技有限公司 | A kind of vehicle frame of folding bicycle |
| CN108500075A (en) * | 2018-04-20 | 2018-09-07 | 北京航星机器制造有限公司 | A kind of aluminium alloy flange disk heating tube hot type mold and its extrusion forming method |
| CN108526238A (en) * | 2018-03-16 | 2018-09-14 | 北京航星机器制造有限公司 | A kind of asymmetric band lug aluminium alloy flange disk hot extrusion near-net-shape method |
| CN108704950A (en) * | 2018-05-31 | 2018-10-26 | 北京航星机器制造有限公司 | A kind of hot-pressed mold of saddle-shape beam member and component forming method |
| CN113369327A (en) * | 2021-06-11 | 2021-09-10 | 中国兵器工业第五九研究所 | Open cavity circular extrusion process |
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2009
- 2009-12-16 CN CN2009102598536A patent/CN101723039B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102294393A (en) * | 2011-09-02 | 2011-12-28 | 昆山市友森精密机械有限公司 | Equipment and process for forming bicycle aluminum alloy upright pipe |
| CN102294393B (en) * | 2011-09-02 | 2013-07-24 | 昆山市友森精密机械有限公司 | Equipment and process for forming bicycle aluminum alloy upright pipe |
| CN106945776A (en) * | 2017-05-06 | 2017-07-14 | 浙江凯驰电动科技有限公司 | A kind of vehicle frame of folding bicycle |
| CN108526238A (en) * | 2018-03-16 | 2018-09-14 | 北京航星机器制造有限公司 | A kind of asymmetric band lug aluminium alloy flange disk hot extrusion near-net-shape method |
| CN108500075A (en) * | 2018-04-20 | 2018-09-07 | 北京航星机器制造有限公司 | A kind of aluminium alloy flange disk heating tube hot type mold and its extrusion forming method |
| CN108704950A (en) * | 2018-05-31 | 2018-10-26 | 北京航星机器制造有限公司 | A kind of hot-pressed mold of saddle-shape beam member and component forming method |
| CN108704950B (en) * | 2018-05-31 | 2020-06-19 | 北京航星机器制造有限公司 | Saddle-shaped cross beam member hot extrusion forming die and member forming method |
| CN113369327A (en) * | 2021-06-11 | 2021-09-10 | 中国兵器工业第五九研究所 | Open cavity circular extrusion process |
| CN113369327B (en) * | 2021-06-11 | 2022-04-12 | 中国兵器工业第五九研究所 | Open cavity circular extrusion process |
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| Publication number | Publication date |
|---|---|
| CN101723039B (en) | 2011-11-16 |
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