CN112157404A - Bicycle stem and method of making same - Google Patents
Bicycle stem and method of making same Download PDFInfo
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- CN112157404A CN112157404A CN202011030140.5A CN202011030140A CN112157404A CN 112157404 A CN112157404 A CN 112157404A CN 202011030140 A CN202011030140 A CN 202011030140A CN 112157404 A CN112157404 A CN 112157404A
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- hole
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- standpipe
- pipe
- sidewall
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
- B62K21/00—Steering devices
- B62K21/12—Handlebars; Handlebar stems
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Motorcycle And Bicycle Frame (AREA)
Abstract
The invention discloses a bicycle vertical tube and a manufacturing method thereof. The bicycle vertical pipe comprises a vertical pipe body and a shoulder cover, wherein the shoulder cover is integrally connected with the vertical pipe body, the shoulder cover is provided with a through hole penetrating through the shoulder cover, and the axis of the through hole is vertical to the axis of the vertical pipe body; the wall of the through hole is provided with a groove or a bulge. In the embodiment, the bicycle vertical tube is integrally connected with the vertical tube body through the shoulder cover to replace a welding connection mode, so that the connection stability is improved.
Description
Technical Field
The invention relates to the technical field of bicycles, in particular to a bicycle vertical tube and a manufacturing method thereof.
Background
The guide system of bicycle is composed of handlebar, front fork, front axle and front wheel. The rider can change the driving direction and keep the balance of the bicycle body by operating the handlebar, the front fork is connected with the handlebar and the front shaft, and the stability of the front fork plays an important role in use safety. The front fork is including continuous standpipe and front fork leg, and the handlebar is connected to the standpipe, and the front axle is connected to the front fork leg, and the fastness of the connection of front fork leg and standpipe plays crucial effect to the holistic fastness of front fork. In the related art, the standpipe comprises a standpipe body and a shoulder cover, the standpipe body and the shoulder cover are fixedly connected in a welding mode, a front fork leg is welded on each of two sides of the shoulder cover, and the connecting mode is prone to fracture at the welding position.
Disclosure of Invention
The invention mainly aims to provide a bicycle vertical tube and a manufacturing method thereof, and aims to solve the problem of breakage of a welding part of the vertical tube.
To achieve the above object, the present invention provides a bicycle standpipe, comprising:
a standpipe body; and
the shoulder cover is integrally connected with the vertical pipe body and provided with a through hole, the through hole penetrates through the shoulder cover, and the axis of the through hole is vertical to the axis of the vertical pipe body; the hole wall of the through hole is provided with a groove or a bulge.
In an embodiment of the present invention, the hole wall of the through hole includes a first sidewall and a second sidewall that are oppositely disposed, the first sidewall is disposed close to the standpipe body, the second sidewall is disposed away from the standpipe body, the first sidewall is an arc-shaped surface, the second sidewall is a plane, and the first sidewall and/or the second sidewall are provided with the groove or the protrusion.
In an embodiment of the invention, a projection of the second sidewall on the first sidewall is located in the first sidewall.
In an embodiment of the present invention, a hollow hole is formed in the standpipe body.
In an embodiment of the present invention, the hollow hole includes a first hole section, a connecting hole section and a second hole section, which are coaxially disposed, and the first hole section and the second hole section are connected and communicated through the connecting hole section; the second hole section is arranged close to the through hole;
the first pore section has a larger pore diameter than the second pore section; and/or the aperture of the connecting hole section is gradually reduced from one end close to the first hole section to one end close to the second hole section.
The invention also provides a manufacturing method of the bicycle vertical tube, which comprises the following steps:
preparing materials: providing an aluminum alloy round solid pipe;
length extraction treatment: drawing one end of the pipe to a required length, so that the drawn end of the pipe forms a first pipe section, and the other end of the pipe forms a second pipe section;
forging treatment: forging the first pipe section and the second pipe section to form the first pipe section into the standpipe body, and the second pipe section into the shoulder cap;
processing and forming holes: and processing the shoulder cover to form a through hole penetrating through the shoulder cover, and forming a groove or a bulge on the hole wall of the through hole.
In one embodiment of the present invention, the forging process includes: and placing the tube subjected to the lengthening treatment into a forging die so as to forge the first tube section to form the vertical tube body, and forge the second tube section to form the shoulder cover.
In an embodiment of the present invention, the forging process further includes:
fixed point: determining a central point on one side of the shoulder cover away from the standpipe body;
turning: and a thimble of the lathe props against the central point, and the outer diameter of the vertical pipe body is turned to obtain the designed outer diameter of the vertical pipe body.
In an embodiment of the present invention, the forging process step further includes: polishing the periphery of the tube subjected to the lengthening treatment;
and/or the forging treatment step is followed by: and cutting off burrs and waste materials generated on the periphery of the pipe after the forging treatment.
In an embodiment of the present invention, the step of forming the hole further includes: and drilling a hollow hole along the direction from one end of the standpipe body far away from the shoulder cover to the direction close to the shoulder cover.
The invention has the beneficial effects that:
1. according to the technical scheme, the bicycle vertical tube is integrally connected with the vertical tube body through the shoulder cover instead of a welding connection mode, so that the connection stability is improved, meanwhile, the through hole is formed in the shoulder cover and is used for the front fork leg to penetrate through, the front fork leg penetrates through the through hole and then is matched with the groove or the protrusion of the through hole, the purpose of stable matching connection is achieved, the contact area of connection can be improved through the arrangement of the through hole, the stress of the vertical tube and the front fork leg is dispersed, and the connection stability and the impact resistance are improved. The vertical tube structure provided by the invention can change the connection mode of the existing front fork structure, replace the welding connection mode and overcome the defects of unstable connection and the like caused by welding.
2. In the manufacturing method of the bicycle vertical pipe in the technical scheme, the vertical pipe is integrally formed through forging treatment, so that the vertical pipe is simpler and more convenient in integral assembly and combination, and the vertical pipe is integrally formed and does not need to be connected and combined in a welding manner, so that the structural strength of the vertical pipe can be effectively improved, and larger and frequent vibration impact force can be borne.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of a standpipe according to an embodiment of the present invention;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic view of an embodiment of a standpipe of the present invention assembled with a front fork leg;
FIG. 5 is a schematic flow chart illustrating a method of manufacturing a bicycle standpipe according to one embodiment of the present invention;
FIG. 6 is a schematic flow chart illustrating a method of manufacturing a bicycle standpipe according to another embodiment of the present invention;
FIG. 7 is a schematic view of a manufacturing process for a bicycle standpipe according to the present invention.
The reference numbers illustrate:
the implementation, functional features and advantages of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a bicycle vertical tube.
In an embodiment of the present invention, as shown in fig. 1 to 4, the bicycle seat tube includes a seat tube body 1 and a shoulder cap 2, the shoulder cap 2 is integrally connected to the seat tube body 1, the shoulder cap 2 is provided with a through hole 21 penetrating through the shoulder cap, and an axis of the through hole 21 is perpendicular to an axis of the seat tube body 1; the wall of the through hole 21 is provided with a groove 22 or a bulge.
In the embodiment, the bicycle vertical tube is integrally connected with the vertical tube body 1 through the shoulder cover 2 instead of a welding connection mode, so that the connection stability is improved, meanwhile, the through hole 21 is formed in the shoulder cover 2 and is used for the front fork leg 200 to penetrate through, the front fork leg 200 penetrates through the through hole 21 and then is matched with the groove 22 or the protrusion of the through hole 21, and the purpose of stable matching connection is achieved. The vertical tube structure provided by the invention can change the connection mode of the existing front fork structure, replace the welding connection mode and overcome the defects of unstable connection and the like caused by welding.
In an embodiment of the present invention, the standpipe body 1 is an elongated tubular structure, the length of the standpipe body 1 is 300 ± 50mm, and in this embodiment, the length of the standpipe body 1 is 300 mm. Through setting up standpipe body 1 into long circular tube structure, and standpipe body 1's length is 300 ± 50mm, can satisfy the demand of bicycle. The vertical pipe body 1 and the shoulder cover 2 are made of aluminum alloy; the aluminum alloy has the characteristics of low density, good mechanical property, good processing property, no toxicity, easy recovery, good conductivity, heat transfer property, corrosion resistance and the like. This embodiment adopts the aluminum alloy material, can guarantee under the condition of intensity, weight reduction, and difficult rust. The standpipe 100 has an outer diameter of 28.6 mm. In this embodiment, the outer diameter of the standpipe body 1 is set to be 28.6mm, so that the universality can be improved.
In this embodiment, the pore wall of through hole 21 is equipped with recess 22, and is corresponding, is equipped with corresponding arch on the front fork leg 200 that forms the front fork with the standpipe 100 in the assembly, and recess 22 and protruding cooperation joint improve the joint strength of standpipe 100 and front fork leg 200, improve connection stability simultaneously.
In another embodiment, the wall of the through hole 21 is provided with a protrusion, and correspondingly, the front fork leg 200 assembled with the vertical tube 100 to form the front fork is provided with a corresponding groove 22, and the groove 22 is in fit and clamping connection with the protrusion, so that the connection strength of the vertical tube 100 and the front fork leg 200 is improved, and the connection stability is improved.
In an embodiment of the present invention, the through hole includes a first sidewall and a second sidewall that are oppositely disposed, the first sidewall is disposed close to the standpipe body 1, the second sidewall is disposed away from the standpipe body 1, the first sidewall is an arc-shaped surface, the second sidewall is a plane, and the first sidewall and/or the second sidewall are/is provided with the groove 22 or the protrusion.
It can be understood that, because the through hole 21 is close to the pore wall of standpipe body 1 one side undertakes main effort, be close to through hole 21 the pore wall of standpipe body 1 one side sets up to the arcwall face, can improve the ability of bearing load of standpipe 100, and the arcwall face can play the effect of buffering release to load, and the design of arcwall face increases the contact surface of standpipe 100 and front fork leg 200 simultaneously, can improve connection stability and shock resistance. Meanwhile, the groove 22 and the protrusion may serve to couple the front fork leg 200, and improve coupling strength and coupling stability.
Through hole 21 is kept away from the pore wall of standpipe body 1 one side is the plane, through hole 21 is kept away from the effort that the pore wall of standpipe body 1 one side bore is less than that through hole 21 is close to the effort that the pore wall of standpipe body 1 one side bore, keep away from through hole 21 the pore wall of standpipe body 1 one side sets up to the plane and can reduce the shaping degree of difficulty, and simultaneously, one side pore wall arcwall face, one side pore wall are planar structural design, can play limiting displacement to the front fork leg 200 that inserts through hole 21, avoid taking place the skew, guarantee the stability of front fork. The groove 22 and the protrusion may serve to further couple the front fork leg 200 and improve coupling strength and coupling stability.
In this embodiment, the first side wall and the second side wall are both provided with the grooves 22, and in other embodiments, the grooves may be provided only on the first side wall or only on the second side wall.
In this embodiment, the through hole 21 is kept away from the pore wall place plane of standpipe body 1 one side with the axis of standpipe 100 is the contained angle setting, makes front fork leg 200 and standpipe 100 be the contained angle setting, satisfies the structural requirement of bicycle, is applicable to most model bicycles, improves the suitability.
As shown in fig. 3, in an embodiment of the present invention, a projection of the second sidewall on the first sidewall is located inside the first sidewall.
It can be understood that the projected edge of the through hole 21 on the side close to the standpipe body 1 on the side of the through hole 21 away from the standpipe body 1 is exposed at the edge of the through hole 21 on the side away from the standpipe body 1. On one hand, the projection edge of one side of the through hole 21, which is close to the standpipe body 1, of one side of the through hole 21, which is far away from the standpipe body 1, is exposed at the edge of one side of the through hole 21, which is far away from the standpipe body 1, so that the area of one side of the through hole 21, which is close to the standpipe body 1, is larger than that of one side of the through hole 21, which is far away from the standpipe body 1, and on the other hand, because the parts, which are located at the two ends of the through hole 21, of the front fork leg 200 are oppositely arranged, an installation space is formed to be assembled with a front shaft and a front wheel, and the structural design can prevent the installation of the front fork leg 200 from being.
As shown in fig. 3, in an embodiment of the present invention, the number of the grooves 22 is multiple, and a plurality of the grooves 22 are arranged in parallel at intervals. Correspondingly, be equipped with the bellied quantity that corresponds on the front fork leg 200 that forms the front fork with standpipe 100 and be a plurality of, a plurality of protruding parallel interval sets up, and recess 22 and protruding cooperation joint improve the joint strength of standpipe 100 and front fork leg 200, improve connection stability simultaneously.
In an embodiment of the present invention, as shown in fig. 3, a step surface is formed at the connection of the shoulder cap 2 and the standpipe body 1, and the standpipe body 1 smoothly transitions to the step surface.
In this embodiment, the connection between the standpipe body 1 and the shoulder cover 2 is stepped and smoothly transits. In order to ensure that the shoulder cover 2 has enough strength, the shoulder cover 2 is arranged to be of a block-shaped structure, the long tubular vertical pipe body 1 is connected with the block-shaped shoulder cover 2, so that the joint is in a step shape, and in order to improve the connection strength, the joint of the vertical pipe body 1 and the shoulder cover 2 is in smooth transition.
In an embodiment of the present invention, as shown in fig. 3, a hollow hole 11 is formed in the standpipe body 1.
It is understood that the hollow hole 11 is spaced apart from the through hole 21. The hollow hole 11 is formed in the vertical pipe body 1, so that the whole weight of the vertical pipe 100 can be reduced, the purpose of reducing the weight of the bicycle is achieved, and meanwhile, the assembling requirement can be met. Meanwhile, the hollow hole 11 and the through hole 21 are arranged at intervals, so that the contact area between the front fork leg 200 and the hole wall of the through hole 21 can be ensured, and the overall strength of the vertical pipe 100 can be ensured.
As shown in fig. 3, in an embodiment of the present invention, the hollow hole 11 includes a first hole section 111, a connecting hole section 112 and a second hole section 113 which are coaxially arranged, and the first hole section 111 and the second hole section 113 are connected and communicated through the connecting hole section 112; the second hole segment 113 is disposed near the through hole 21, and the aperture of the first hole segment 111 is larger than that of the second hole segment 113.
It can be understood that the diameter of the second hole section 113 is smaller than the diameter of the first hole section 111, so that the wall thickness of the portion of the standpipe body 1 close to the through hole 21 is larger than that of the portion of the standpipe body 1 far from the through hole 21, and the load bearing capacity of the standpipe body 1 is improved.
In one embodiment of the present invention, as shown in fig. 3, the aperture of the connecting bore section 112 is gradually reduced from the end near the first bore section 111 to the end near the second bore section 113. The connecting hole section 112 plays a role in connection transition, the aperture of the connecting hole section 112 is gradually reduced from one end close to the first hole section 111 to one end close to the second hole section 113, the structure is simple, holes are formed, and the production efficiency is improved.
In an embodiment of the present invention, the standpipe body 1 and the shoulder cap 2 are integrally formed.
It can be understood that the integrally formed structure is convenient for large-scale production, and the connection strength of the integrally formed product is higher.
The present invention is assembled with the front fork leg to form a bicycle front fork as shown in fig. 4, wherein the front fork leg 200 is inserted into the through hole 21.
Fig. 1, 2, and 4 are perspective views.
The present invention also provides a method for manufacturing a bicycle stem, as shown in fig. 5, the method for manufacturing the bicycle stem comprises the steps of:
s110, preparing materials: providing an aluminum alloy round solid pipe;
s120, length extraction treatment: drawing one end of the pipe to a required length, so that the drawn end of the pipe forms a first pipe section, and the other end of the pipe forms a second pipe section;
s130, forging treatment: forging the first pipe section and the second pipe section to form the first pipe section into the standpipe body, and the second pipe section into the shoulder cap;
s140, processing and forming holes: the shoulder cap 2 is processed to form a through hole 21 penetrating through the shoulder cap 2, and a groove or a protrusion is formed on the hole wall of the through hole 21.
In the manufacturing method of the bicycle vertical pipe in the embodiment, the vertical pipe is integrally formed through forging treatment, so that the vertical pipe is easier and more convenient to assemble integrally, and the vertical pipe is integrally formed and does not need to be connected and combined in a welding manner, so that the structural strength of the vertical pipe can be effectively improved, and larger and frequent vibration impact force can be borne.
It can be understood that, in this embodiment, one end of the solid pipe is elongated to a required length by the elongation processing, the length is the length of the designed standpipe body 1, the first pipe section and the second pipe section formed by the elongated pipe are preliminary rudiments of the standpipe body 1 and the shoulder cover 2, the pipe diameter of the second pipe section formed by the elongation processing is smaller than that of the first pipe section, so that the first pipe section and the second pipe section are stepped, and the second pipe section can have sufficient strength after forming the shoulder cover 2. Specifically, in this example, the tube was heated to 480 ℃ and drawn by a drawing machine.
The forging treatment is a processing method for applying pressure to the pipe by using a forging machine to enable the pipe to generate plastic deformation so as to obtain a forged piece with certain mechanical property, certain shape and certain size, the defects of casting-state looseness and the like generated in the smelting process of the pipe can be eliminated through the forging treatment, the microstructure is optimized, meanwhile, due to the fact that a complete metal streamline is saved, the mechanical property of the pipe after the forging treatment is generally superior to that of a casting made of the same material, in the embodiment, the shoulder cover 2 forms a designed shape through the forging treatment, and the vertical pipe body 1 also forms a designed shape, namely the overall appearance of the vertical pipe is the same as that of the designed vertical pipe. Specifically, in this example, the tube was heated to 460 ℃ to perform the forging process.
In this embodiment, the through hole 21 is formed by machining with a numerically controlled four-axis milling machine.
In an embodiment of the present invention, the step S130 of the forging process includes: and placing the tube subjected to the lengthening treatment into a forging die so as to forge the first tube section to form the vertical tube body, and forge the second tube section to form the shoulder cover.
The pipe is pressed and deformed in the forging die with a certain shape to obtain the forge piece with the required shape, so that large-scale mass production can be realized, and the production efficiency is improved.
As shown in fig. 6 and 7, in an embodiment of the present invention, the forging process further includes step S160:
fixed point: determining a central point on one side of the shoulder cover away from the standpipe body;
turning: and a thimble of the lathe props against the central point to perform turning processing on the outer diameter of the vertical pipe body.
In the embodiment, one end of the standpipe body 1 close to the shoulder cover 2 is clamped through a lathe, and a central point is determined on one side of the shoulder cover 2 far away from the standpipe body 1; the end, far away from the shoulder cover 2, of the vertical pipe body 1 is clamped through a lathe, meanwhile, a center point is propped against a thimble of the lathe, turning processing is carried out on the outer diameter of the vertical pipe body 1, and the designed outer diameter of the vertical pipe body 1 is obtained.
It can be understood that, after the central point is confirmed through the fixed point, with stable centre gripping of tubular product on the lathe, can carry out lathe work to tubular product, obtain the external diameter of the standpipe body 1 of design, satisfy the design needs, improve the smoothness on standpipe body 1 surface.
As shown in fig. 6, in an embodiment of the present invention, the forging process step further includes S150: and polishing the periphery of the tube subjected to lengthening treatment.
Sanding, which is one of surface modification techniques, generally refers to a processing method for changing physical properties of a material surface by friction with the aid of a rough object (sand paper or the like containing particles of relatively high hardness) mainly for the purpose of obtaining a specific surface roughness. It can be understood that the surface roughness of the tube after the elongation treatment can be improved by the grinding treatment, and the required shape can be successfully obtained by the subsequent forging treatment, so that the rejection rate is reduced.
As shown in fig. 6, in an embodiment of the present invention, S160 after the forging processing step further includes: and cutting off burrs and waste materials generated on the periphery of the pipe after the forging treatment.
It can be understood that burrs and scraps are generated on the outer circumference of the pipe during the forging process, and are removed through the removal process, and simultaneously polished, to improve the surface smoothness.
As shown in fig. 6 and 7, in an embodiment of the present invention, the step S140 of forming a hole further includes S141: and drilling a hollow hole along the direction from one end of the standpipe body far away from the shoulder cover to the direction close to the shoulder cover.
In this embodiment, the standpipe body 1 is processed to form the hollow hole 11. The hollow hole 11 is obtained by numerical control drilling.
In this embodiment, the step S140 of forming a hole further includes S141: drilling a hollow hole along the direction from one end of the standpipe body far away from the shoulder cover to the direction close to the shoulder cover;
s142: the through hole 21 is formed in the shoulder cap 2.
The above S141 and S142 are not in sequence.
In an embodiment of the present invention, the step of forming the hollow hole 11 in the standpipe body 1 includes:
primary drilling: machining a hole groove extending from one end of the standpipe body 1 far away from the shoulder cover 2 to one end close to the shoulder cover 2 on the standpipe body 1, wherein the hole diameter of the hole groove is equal to that of the second hole section 113;
secondary drilling: the first hole section 111 and the connecting hole section 112 are formed by secondary processing at a portion of the hole groove remote from the shoulder cap 2.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A bicycle standpipe, comprising:
a standpipe body; and
the shoulder cover is integrally connected with the vertical pipe body and provided with a through hole, the through hole penetrates through the shoulder cover, and the axis of the through hole is vertical to the axis of the vertical pipe body; the hole wall of the through hole is provided with a groove or a bulge.
2. The bicycle standpipe of claim 1, wherein the wall of the through-hole comprises a first sidewall and a second sidewall disposed opposite to each other, the first sidewall is disposed adjacent to the standpipe body, the second sidewall is disposed away from the standpipe body, the first sidewall is an arcuate surface, the second sidewall is a flat surface, and the first sidewall and/or the second sidewall is provided with the recess or protrusion.
3. The bicycle standpipe of claim 2, wherein a projection of the second sidewall onto the first sidewall is located within the first sidewall.
4. The bicycle standpipe of claim 1, wherein a hollow bore is formed in the standpipe body.
5. The bicycle standpipe of claim 4, wherein the hollow bore comprises a first bore section, a connecting bore section, and a second bore section coaxially arranged, the first bore section and the second bore section being connected and in communication by the connecting bore section; the second hole section is arranged close to the through hole;
the first pore section has a larger pore diameter than the second pore section; and/or the aperture of the connecting hole section is gradually reduced from one end close to the first hole section to one end close to the second hole section.
6. A method of manufacturing a bicycle standpipe according to any one of claims 1-5, wherein the method of manufacturing the bicycle standpipe comprises the steps of:
preparing materials: providing an aluminum alloy round solid pipe;
length extraction treatment: lengthening one end of the pipe to form a first pipe section at the lengthened end of the pipe and a second pipe section at the other end of the pipe;
forging treatment: forging the first pipe section and the second pipe section to enable the first pipe section to form a vertical pipe body, and enabling the second pipe section to form a shoulder cover;
processing and forming holes: and processing the shoulder cover to form a through hole penetrating through the shoulder cover, and forming a groove or a bulge on the hole wall of the through hole.
7. The method of manufacturing according to claim 6, wherein the step of forging process comprises: and placing the tube subjected to the lengthening treatment into a forging die so as to forge the first tube section to form the vertical tube body, and forge the second tube section to form the shoulder cover.
8. The method of manufacturing according to claim 6, wherein the step of forging further comprises:
fixed point: determining a central point on one side of the shoulder cover away from the standpipe body;
turning: and a thimble of the lathe props against the central point to perform turning processing on the outer diameter of the vertical pipe body.
9. The method of manufacture of claim 6, wherein the forging process step is preceded by: polishing the periphery of the tube subjected to the lengthening treatment;
and/or the forging treatment step is followed by: and cutting off burrs and waste materials generated on the periphery of the pipe after the forging treatment.
10. The method of manufacturing of claim 6, wherein the step of forming a hole further comprises: and drilling a hollow hole along the direction from one end of the standpipe body far away from the shoulder cover to the direction close to the shoulder cover.
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| CN202011030140.5A CN112157404B (en) | 2020-09-25 | 2020-09-25 | Bicycle stem and method of making same |
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| CN202011030140.5A CN112157404B (en) | 2020-09-25 | 2020-09-25 | Bicycle stem and method of making same |
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| CN112157404A true CN112157404A (en) | 2021-01-01 |
| CN112157404B CN112157404B (en) | 2021-09-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115013455A (en) * | 2022-05-30 | 2022-09-06 | 上海裴椒汽车部件制造有限公司 | Brake oil pipe joint and forming process thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115013455A (en) * | 2022-05-30 | 2022-09-06 | 上海裴椒汽车部件制造有限公司 | Brake oil pipe joint and forming process thereof |
| CN115013455B (en) * | 2022-05-30 | 2024-05-03 | 上海裴椒汽车部件制造有限公司 | Brake oil pipe joint and forming process thereof |
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