TWI653159B - Bicycle rim and processing method for drilling the rim - Google Patents

Abstract

The invention relates to a bicycle rim, which includes an inner ring wall and an outer ring wall. The outer ring wall surrounds the outer circumference of the inner ring wall and is separated from the inner ring wall by a predetermined distance. A first perforation is processed by drilling, and a second perforation corresponding to the first perforation is processed in the outer ring wall by hot spinning, and the bottom of the second perforation is simultaneously processed during the hot spinning process The periphery of the end squeezes out a bearing. In this way, the rim of the present invention utilizes the bearing portion to provide a good supporting effect to its matching components (such as the air nozzle), and the use of the hot spinning method can eliminate the inherent weakness of the squeeze rim And achieve the effect of simplifying the process, not damaging the structure and reducing the waste of materials.

Description

Bicycle rim and processing method for drilling the rim

The present invention relates to bicycles, in particular to a bicycle rim and a processing method for drilling the rim.

As far as the traditional manufacturing method of bicycle rims is concerned, the alloy material is mainly extruded by extrusion processing. When extruding, the alloy material must first be heated to a semi-molten state, and then pressed into a plurality of holes with pressure Before the die, divide it into three or four pieces, then enter the rear die together and melt it into one, then extrude it, then extrude the rear die under pressure, fix it by welding, and finally bend it into a ring frame, and The two ends of the ring-shaped frame are connected together, so that a slit-shaped rim is formed.

In order to cooperate with the installation of other components (such as gas nozzles), in the prior art, the cutting rim is generally used to drill the rim, but the aforementioned processing method directly destroys the structure of the rim, so it will inevitably affect the rim The strength of the structure, even after being used with the aforementioned components for a period of time, is likely to cause the rim to break in the direction of its extrusion due to the relationship of stress concentration, and in order to remove the burr of the hole edge, it may still be after the drilling step There will be one more step of milling, which will lead to the problems of complicated procedures, expensive manufacturing costs and waste of materials.

The main object of the present invention is to provide a bicycle rim that can expand the contact area with related components (such as an air nozzle), thereby enhancing the structural stability and supporting effect of the foregoing components after installation.

In order to achieve the above main purpose, the bicycle rim of the present invention includes two opposite side walls, an inner ring wall and an outer ring wall. The inner ring wall is integrally connected to the bottom ends of the two side walls, and the outer ring wall is integrally connected between the two side walls and maintains a predetermined distance from the top of the two side walls and the inner ring wall respectively, wherein, The inner ring wall has a plurality of first perforations arranged at equal intervals, the outer ring wall has a plurality of second perforations arranged at equal intervals, and the second perforations of the outer ring wall correspond one-to-one to the inner ring wall The first perforation, and the bottom surface of the outer ring wall integrally extends a bearing portion from the peripheral edge of each second perforation along the axial direction of each second perforation toward the direction of the inner ring wall, the bearing portion is used to Increase the contact area with a component (such as an air nozzle), so that the structural stability and support effect of the component after installation is completed.

The second object of the present invention is to provide a machining method for drilling the aforementioned rim, which can greatly increase the structural strength and improve the fatigue performance under the condition of satisfying the weight reduction, and has the simplified process, does not damage the structure and reduces the material Wasted features.

In order to achieve the aforementioned second objective, the first processing method provided by the present invention uses two different drills for processing, which includes two steps: the first step uses a cutting drill bit in the inner ring wall of the rim The first perforation is processed; the second step uses a hot-melt drill bit to process the second perforation by hot spinning on the outer wall of the rim, and the hot-melt drill bit is pressed so that The outer ring wall integrally extends a bearing portion from the peripheral edge of the second perforation toward the inner ring wall.

Secondly, the second processing method provided by the present invention is to use a drill with a composite structure for processing. First, a cutting part of the drill is operated to drill a cutting hole outside the ring wall of the rim, and then the operation is performed The drill bit moves in the direction of the inner ring wall of the rim along the axial direction of the cutting hole. On the one hand, one of the drill bits is connected to the hot melt part of the cutting part to expand the cutting hole to form a second by hot spinning Perforation, on the other hand, at the same time, the cutting part of the drill bit was used to drill a first perforation in the inner ring wall of the rim, and by the extrusion of the hot-melt part of the drill bit, the outer ring wall was removed from the first The periphery of the two perforations integrally extends a bearing portion toward the inner ring wall.

In addition, the third processing method provided by the present invention is to use a single hot-melt drill bit for processing. First, the hot-melt drill bit is operated on the outer wall of the rim to form a second perforation by hot spinning, and By the displacement of the hot-melt drill bit, the outer ring wall integrally extends a bearing portion from the peripheral edge of the second perforation toward the direction of the inner ring wall, and then operates the hot-melt drill bit along the second perforation The axial direction moves toward the inner ring wall, so that the hot-melt drill bit forms a first perforation on the inner ring wall by hot spinning, and a flange is extruded on the periphery of the first perforation, the The flange is used to provide support for a spoke head. In addition, before operating the hot-melt drill bit, a jig can be installed on a side of the inner ring wall facing away from the outer ring wall, when a tail of the hot-melt drill bit passes through the first perforation of the inner ring wall, It is received by one of the receiving grooves of the jig, or extends into one of the receiving grooves of the jig, so that the length of a tube portion integrally extended from the bottom end of the first perforation can be effectively controlled, The tube is used to provide a protective effect on the spoke head.

As can be seen from the above, the processing method of the present invention mainly utilizes the high temperature generated by the hot spinning process to extrude the second perforation after the outer ring wall is in a molten state, and simultaneously forms the bearing portion during the processing, thus The milling step used in the prior art can be omitted to achieve the effect of simplifying the process, and the purpose of not damaging the structure and reducing material waste can be achieved.

The detailed structure, characteristics, assembly or use of the bicycle wheel rim and the processing method for drilling the wheel rim provided by the present invention will be described in the detailed description of the subsequent embodiments. However, those of ordinary knowledge in the field of the present invention should be able to understand that these detailed descriptions and specific embodiments listed for implementing the present invention are only used to illustrate the present invention, and are not intended to limit the scope of the patent application of the present invention.

The applicant first explains here that in the embodiments and drawings to be described below, the same reference numbers indicate the same or similar elements or their structural features.

Please refer to FIGS. 1 and 2 first. The rim 10 of the first embodiment of the present invention includes two opposing side walls 20, an inner ring wall 30 and an outer ring wall 40. The inner ring wall 30 is integrally connected to the bottom ends of the two side walls 20, and the outer ring wall 40 is integrally connected between the two side walls 20 and maintains a predetermined distance from the top of the two side walls 20 and the inner ring wall 30, respectively , Wherein the inner ring wall 30 has a plurality of first perforations 32 arranged at equal intervals, the first perforations 32 penetrate the top and bottom of the inner ring wall 30, and the bottom end of the first perforation 32 is flush with the inner ring wall At the bottom surface of 30, the outer ring wall 40 has a plurality of second perforations 42 arranged at equal intervals. The second perforations 42 penetrate the top and bottom surfaces of the outer ring wall 40, and the second perforations 42 correspond to the inside in a one-to-one manner The diameter of the first through hole 32 and the second through hole 42 of the ring wall 30 is larger than that of the first through hole 32. In addition, the bottom surface of the outer ring wall 40 integrally extends a bearing portion 44 from the peripheral edge of each second through hole 42 along the axial direction of each second through hole 42 in the direction of the inner ring wall 30.

Please refer to FIG. 3 again. The air nozzle 50 shown in the figure includes a stop block 52 and a tube 54 connected to the stop block 52. When the gas nozzle 50 is installed on the rim 10 of the first embodiment of the present invention, the resisting block 52 of the gas nozzle 50 is inserted into the second perforation 42 of the outer ring wall 40 and abuts against the bearing of the outer ring wall 40 Part 44, the tube 54 of the gas nozzle 50 is inserted into the first perforation 32 of the inner ring wall 30, and then the gas nozzle 50 is locked by a nut 56 screwed to the tube 54 of the gas nozzle 50, The air nozzle 50 is driven by the nut 36 to move in the direction of the inner ring wall 30 along the axial direction of the second perforation 42, so that the stopper 52 of the air nozzle 50 closely abuts the bearing portion of the outer ring wall 40 44. At this time, the bearing portion 44 increases the contact area between the abutment block 52 of the gas nozzle 50, on the one hand, provides a good support effect to the abutment block 52 of the gas nozzle 50, so that the gas nozzle 50 is subjected to external force During operation, it is not easy to produce skew, thereby achieving the effect of improving structural stability. On the other hand, the air nozzle 50 can increase the adhesion between the rim 10 and the rim 10, thereby preventing air leakage.

The above is the detailed structure of the rim 10 according to the first embodiment of the present invention, and the processing method for drilling the rim 10 according to the first embodiment of the present invention will be described below. There are two processing methods in total, and the first processing method As shown in Figure 4:

a): As shown in step S1 in FIG. 4, a cutting drill 60 is operated to process a first perforation 32 from the bottom to the inner ring wall 30.

b): As shown in step S3 in FIG. 4, operate a hot-melt drill bit 62 to perform hot spinning on the outer ring wall 40. At this time, the outer ring wall 40 will be affected by the high-temperature friction of the hot-melt drill bit 62 at the processing point A molten state is formed at the position where a second perforation 42 is processed after the hot-melt drill bit 62 penetrates the outer ring wall 40. In addition, during the operation of the hot-melt drill 62 to process the second perforation 42, since the outer ring wall 40 is in a molten state, the outer ring wall 40 faces the inner ring wall 30 by the downward displacement of the hot-melt drill 62. One side surface integrally extends from the receiving portion 44 toward the inner ring wall 30 from the peripheral edge of the second perforation 42.

On the other hand, in step S2 shown in FIG. 4, in order to improve the processing accuracy of the second perforation 42, before processing the second perforation 42, the position of the second perforation 42 may be located in the outer ring wall 40, however There are many positioning methods, which are not particularly limited in this embodiment. For example, a general cutting bit or other suitable tool may be used to form a positioning groove 46 in the outer ring wall 40. The center position of the second perforation 42 can be hot-spun according to the position of the positioning groove 46 in step S3.

As can be seen from the above, the first processing method provided by the present invention uses two different drill bits 60, 62 to process the first and second perforations 32, 42 on the inner and outer ring walls 30, 40, which requires operation The processing of the first and second perforations 32 and 42 can only be completed twice. However, in order to further simplify the process, the second processing method provided by the present invention uses a composite drill bit 64 with a composite structure to simultaneously perform inside and outside The first and second perforations 32 and 42 are processed in the ring walls 30 and 40. As shown in FIG. 5, the compound drill bit 64 includes a cutting portion 66 and a hot-melt portion 68 connecting the cutting portion 66. The cutting portion 66 The structure is the same as that of the aforementioned drill bit 40, and the structure of the hot-melt portion 68 is similar to that of the aforementioned hot-melt drill bit 62, so that the processing of the first and second perforations 32 and 42 can be completed at the same time by one operation.

As shown in step S1 shown in FIG. 5, the cutting portion 66 of the compound drill bit 64 is drilled to form a cutting hole 48 in the outer ring wall 40 from top to bottom, and then the compound type is operated as shown in step S2 shown in FIG. The drill bit 64 moves in the direction of the inner ring wall 30 along the axial direction of the cutting hole 48. During the downward movement of the compound drill bit 64, on the one hand, the hot-melt portion 68 is used to expand the cutting hole 48 to form a second Perforation 42, on the other hand, the first perforation 32 is drilled in the inner ring wall 30 by using the cutting portion 66, and by the downward displacement of the compound bit 64, the outer ring wall 40 faces the side of the inner ring wall 30 from the first The peripheral edge of the two perforations 42 integrally extends from the bearing portion 44 toward the inner ring wall 30.

In summary, the two processing methods provided in the first embodiment of the present invention mainly use the high temperature generated by the hot spinning process to make the outer ring wall 40 of the rim 10 form a molten state, and then extrude the second perforation 42 In addition to effectively simplifying the process, the entire process does not interrupt the extrusion flow direction of the rim 10, that is, it does not cause damage to the crystal grains distributed around the second perforation 42, but instead makes the crystal arrangement around the second perforation 42 more The ground is compact, so that the rim 10 can maintain good structural strength, extend the fatigue life of the rim 10 and increase the strength around the second perforation 42, and can also solve the problems of chip evacuation, burr removal and material waste.

Please refer to FIG. 6 again. The rim 12 of the second embodiment of the present invention is substantially the same in structure as the previous embodiment, except that the difference is that the side of the inner ring wall 30 facing the outer ring wall 40 is at the periphery of each first perforation 32 A flange 34 is integrally formed. In this way, the rim 12 of the second embodiment of the present invention can use the second perforation 42 to cooperate with the air nozzle 50 as in the first embodiment described above, and can also use the first perforation 32 to cooperate with a spoke head 58 such as As shown in FIG. 7, when the spoke head 58 is installed, the spoke head 58 is placed in the first perforation 32 via the second perforation 42. After the installation is completed, the flange 34 can be used to provide a good support effect for the spoke head 58.

Please refer to FIG. 8. The rim 12 of the second embodiment of the present invention mainly uses a single hot-melt drill bit 46 for drilling, which is different from the processing method provided in the foregoing first embodiment.

a): As shown in step S1 of FIG. 8, first install a jig 80 on the bottom surface of the inner ring wall 30, and then operate the hot-melt drill bit 70 on the outer ring wall 40 to heat as shown in step S2 of FIG. 8. The second perforation 42 is processed by spinning, and by the downward displacement of the hot-melt drill bit 70, the outer ring wall 40 is integrated toward one side of the inner ring wall 30 from the peripheral edge of the second perforation 42 toward the direction of the inner ring wall 30地 Extends the bearing 44.

b): As shown in step S2 in FIG. 8, the hot-melt drill bit 70 is moved along the axial direction of the second perforation 42 toward the inner ring wall 30, so that the hot-melt drill bit 70 is hot-spinned in the inner ring wall 30 The first perforation 32 is machined, and the flange 34 is extruded on the periphery of the top of the first perforation 32. At this time, a receiving groove 82 of the jig 80 receives a tail 72 of the hot-melt drill bit 70 to make the first perforation The bottom end of 32 is flush with the bottom surface of the inner ring wall 30.

Please refer to FIG. 9 again. The rim 14 of the third embodiment of the present invention is approximately the same in structure as the aforementioned second embodiment, except that the bottom surface of the inner ring wall 30 is away from the inner ring wall from the peripheral edge of each first perforation 32 A tube portion 36 is integrally extended in the direction of 30, and the tube portion 36 is used to provide a protection effect to the spoke head 58.

As for the processing method for drilling the rim 14 of the third embodiment of the present invention is similar to the foregoing second embodiment, the main difference is that the jig 84 used in this embodiment is different, the jig 84 used in this embodiment has a The receiving groove 86 and an accommodating groove 88 communicating with the receiving groove 86, thereby, as shown in step S1 shown in FIG. 10, the receiving groove 86 of the jig 84 receives a part of the two side walls 20 and the inner ring wall 30, Next, as shown in step S2 in FIG. 10, after the hot-melt drill bit 70 is processed to form the first perforation 32 in the inner ring wall 30, the accommodating groove 88 of the jig 84 allows the tail portion 72 of the hot-melt drill bit 70 to enter, Since the inner ring wall 30 is in a molten state at this time, one side of the inner ring wall 30 facing away from the outer ring wall 40 will follow the downward displacement of the hot-melt drill bit 70 from the peripheral edge of the bottom end of the first perforation 32 away from the inner ring wall The direction of 30 extends integrally from the tube portion 36.

However, in order to be able to adjust the extension length of the tube portion 36 to meet different usage requirements, in the fourth embodiment of the present invention, the jig 84 used in the foregoing third embodiment is omitted. When the hot-melt drill bit 70 of the third embodiment performs drilling, the step of installing the jig 84 can be omitted, whereby, as shown in FIGS. 11 and 12, the tube portion 36 will be compared with the jig 84 because it is not restricted by the jig 84. The aforementioned third embodiment can have a long extension length.

In summary, the processing methods provided in the second and third embodiments of the present invention not only process the second perforation 42 by hot spinning, but also process the first perforation 32 by hot spinning. In the process of the first perforation 32, a flange 34 is simultaneously generated on the periphery of the first perforation 32. On the one hand, the flange 34 provides a good support effect for the spoke head 58; on the other hand, the flange 34 is used to increase the inner ring The thickness of the wall 30 around the first perforation 32 does not need to increase the structural strength of the rim 12, 14 by increasing the thickness of the entire inner ring wall 30. Therefore, the processing methods provided in the second and third embodiments of the present invention can keep the rims 12 and 14 at a good structural strength, and also allow the rims 12 and 14 to achieve a lightweight effect.

10, 12, 14‧‧‧ wheels

20‧‧‧Sidewall

30‧‧‧Inner ring wall

32‧‧‧First punch

34‧‧‧Flange

36‧‧‧Administration

40‧‧‧Outer ring wall

42‧‧‧Second Perforation

44‧‧‧Receiving Department

46‧‧‧Locating slot

48‧‧‧cutting hole

50‧‧‧Air nozzle

52‧‧‧stop block

54‧‧‧Body

56‧‧‧Nut

58‧‧‧ spoke head

60‧‧‧cutting bit

62‧‧‧Hot melt drill

64‧‧‧Compound drill

66‧‧‧Cutting Department

68‧‧‧Hot melt department

70‧‧‧Hot melt drill

72‧‧‧tail

80‧‧‧ Fixture

82‧‧‧receiving slot

84‧‧‧ Fixture

86‧‧‧receiving slot

88‧‧‧accommodation slot

S1 ~ S3‧‧‧Step

Fig. 1 is a perspective view of the appearance of a rim according to a first embodiment of the invention. FIG. 2 is a partial perspective cross-sectional view of the rim of the first embodiment of the present invention. FIG. 3 is a schematic cross-sectional view of a rim used with a gas nozzle according to the first embodiment of the present invention. FIG. 4 is a schematic flow chart of drilling a rim according to the first embodiment of the present invention. FIG. 5 is another schematic flow chart of drilling the rim of the first embodiment of the present invention. Fig. 6 is a partial perspective cross-sectional view of a rim according to a second embodiment of the invention. FIG. 7 is a schematic cross-sectional view of a rim used with a spoke head according to a second embodiment of the present invention. FIG. 8 is a schematic flow chart of drilling a rim according to a second embodiment of the present invention. FIG. 9 is a partial perspective cross-sectional view of a rim according to a third embodiment of the invention. FIG. 10 is a schematic flow chart of drilling a rim according to a third embodiment of the present invention. Fig. 11 is a partial perspective cross-sectional view of a rim according to a fourth embodiment of the invention. FIG. 12 is a schematic flow chart of drilling a rim according to a fourth embodiment of the present invention.

Claims (12)

A processing method for drilling a bicycle rim, wherein the rim includes two opposite side walls, an inner ring wall and an outer ring wall, the inner ring wall is integrally connected to the bottom ends of the two side walls, the outer The ring wall is integrally connected between the two side walls and maintains a predetermined distance from the top of the two side walls and the inner ring wall respectively, wherein the inner ring wall has a plurality of first perforations arranged at equal intervals, the The outer ring wall has a plurality of second perforations arranged at equal intervals. The second perforations of the outer ring wall correspond one-to-one to the first perforations of the inner ring wall, and the outer ring wall faces a side of the inner ring wall A bearing portion is integrally extended from the peripheral edge of each second perforation along the axial direction of each second perforation toward the direction of the inner ring wall, and the processing method includes the following steps: a) operating one cutting portion of a drill A cutting hole is drilled outside the ring wall of the rim; and b) The drill bit is moved along the axial direction of the cutting hole in the direction of the inner ring wall of the rim, on the one hand, one of the drill bits is used to connect the cutting The hot-melt part of the part expands the cutting hole to form a second perforation by hot spinning, on the other hand, the cutting part of the drill bit is used to drill a first perforation in the inner ring wall of the rim, and borrow Due to the displacement of the drill bit, the outer ring wall integrally extends a bearing portion from the peripheral edge of the second perforation toward the direction of the inner ring wall. The processing method according to claim 1, wherein the aperture of the second perforation is larger than the aperture of the first perforation. The processing method according to claim 1, wherein the bottom end of the first perforation is flush with the bottom surface of the inner ring wall. A processing method for drilling a bicycle rim, wherein the rim includes two opposite side walls, an inner ring wall and an outer ring wall, the inner ring wall is integrally connected to the bottom ends of the two side walls, the outer The ring wall is integrally connected between the two side walls and maintains a predetermined distance from the top of the two side walls and the inner ring wall respectively, wherein the inner ring wall has a plurality of first perforations arranged at equal intervals, the The outer ring wall has a plurality of second perforations arranged at equal intervals. The second perforations of the outer ring wall correspond one-to-one to the first perforations of the inner ring wall, and the outer ring wall faces a side of the inner ring wall A bearing portion is integrally extended from the peripheral edge of each second perforation along the axial direction of each second perforation toward the direction of the inner ring wall, the processing method includes the following steps: a) operating a hot-melt drill bit at the The outer ring wall of the rim is hot-spun to form a second perforation, and by the displacement of the hot-melt drill bit, the outer ring wall is integrated from the peripheral edge of the second perforation toward the direction of the inner ring wall Extending a bearing portion; and b) operating the hot-melt drill bit along the axial direction of the second perforation in the direction of the inner ring wall of the rim so that the hot-melt drill bit is on the inner ring wall of the rim to The first perforation is processed by hot spinning, and a flange is extruded on the periphery of the first perforation. The processing method according to claim 4, wherein in step b), the inner ring wall extends integrally from the periphery of the first perforation away from the inner ring wall by a displacement of the hot-melt drill bit Pipe Department. The processing method according to claim 5, wherein in step a), before operating the hot-melt drill bit, a jig is installed on a side of the inner ring wall facing away from the outer ring wall; in step b), After the flange is squeezed out of the periphery of the first perforation by the hot-melt drill bit, a receiving groove of the jig allows a tail portion of the hot-melt drill bit to extend in. The processing method according to claim 4, wherein in step a), before operating the drill, a jig is installed on a side of the inner ring wall facing away from the outer ring wall; in step b), the tool is used After the flange of the hot-melt drill bit is extruded from the periphery of the first perforation, a receiving groove of the jig receives a tail portion of the hot-melt drill bit so that the bottom end of the first perforation is flush with the inner ring The wall back faces one side of the outer ring wall. The processing method according to claim 4, wherein the aperture of the second perforation is larger than the aperture of the first perforation. The processing method according to claim 1 or 4, wherein the bottom end of the first perforation is flush with the bottom surface of the inner ring wall. The processing method according to claim 1 or 4, wherein a side of the inner ring wall facing the outer ring wall has a plurality of flanges, and each of the flanges is integrally provided on a periphery of the first perforation. The processing method according to claim 10, wherein a side of the inner ring wall facing away from the outer ring wall has a plurality of tube portions, each of the tube portions is directed away from the inner ring wall from the periphery of the first perforation It extends out in one piece. The processing method according to claim 10, wherein the bottom end of the first perforation is flush with the bottom surface of the inner ring wall.