CN1789070A

CN1789070A - Bicycle frame production method

Info

Publication number: CN1789070A
Application number: CN 200410077678
Authority: CN
Inventors: 沈文振
Original assignee: XIAMEN XINKAI COMPOSITE MATERIALS SCIENCE AND TECHNOLOGY CO LTD
Current assignee: XIAMEN XINKAI COMPOSITE MATERIALS SCIENCE AND TECHNOLOGY CO LTD
Priority date: 2004-12-17
Filing date: 2004-12-17
Publication date: 2006-06-21

Abstract

The bicycle frame producing process includes the first pre-forming the pipes for the frame, the subsequent reinforcing the pipe joints with composite fiber material and painting adhesive to the joints; and finally thermosetting formation via setting the joints in small molds. The present invention has small molds and low cost for forming the pipes, raised joint strength, and no strength loss in the joints caused by centralized stress.

Description

The method for making of cycle frame

Technical field

The invention relates to a kind of method for making of utilizing the cycle frame that composite material makes.

Background technology

Traditional bicycle, whole vehicle frame is made by metal tube, and the bicycle of this metal weldedstructure, vehicle body is heavy, and fatigue resistance is poor.So the dealer is the weight that alleviates vehicle body, increase its fatigue resistance, whole vehicle frame adopts light weight, and the carbon fiber reinforce plastic material that intensity is high is made.

Cooperate shown in Figure 1ly, the vehicle frame that this composition fiber is made is to adopt the global formation technology, the vehicle frame of this global formation, and associative perception is strong in appearance for it, and is attractive in appearance; But it is bigger to make the needed mould of this vehicle frame, and its volume is bigger by 20% than whole vehicle frame at least, the cost of manufacture height of big mould, and this is one of defective; And in manufacturing process, vehicle frame is the wall thickness difference everywhere, and inner attachment hardware is wherein pre-buried with internally pressuring shaping, need dose a large amount of weighting materials in inside like this; Respectively manage junction at vehicle frame in addition, can because of the corner in the thermoset forming process, the forward degree of fiber is difficult for guaranteeing, and cause producing the phenomenon of stress concentration in each pipe fitting junction, this phenomenon is difficult for being found in detection, in use, very easily destroy herein, and cause injury the user.

Summary of the invention

The method for making that the purpose of this invention is to provide a kind of cycle frame reduces manufacturing cost simultaneously with the bond strength that improves each pipe fitting junction of vehicle frame.

For achieving the above object, solution of the present invention is: a kind of method for making of cycle frame, and its method for making is: at first be each body independent preforming respectively with vehicle frame; Secondly carry out reinforcement with extra complex fiber material again in the junction of each body, and at the junction application of adhesive; At last this is connect partly to insert and carry out thermoset forming in the little mould.

When each body connects moulding, carry out thermoset forming with the silica gel mould that waits wall thickness.

Unitized frame after connection is finished is inserted in the integer mould again and is fixed.

Form the deep-slotted chip breaker of cooperation at the interface of each body.

After adopting such scheme, the method for making that the present invention commonly uses relatively has the following advantages:

1, because each body of vehicle frame of the present invention adopts independent moulding, therefore the mould volume that adopts on each body is little, and need not additionally to dose weighting material in manufacturing process, thereby manufacturing cost decreases, and weight also can lightweight.

2, each body is connecting the corner, is by subsidizing behind the complex fiber material vehicle frame that thermoset forming constitutes again, not only strengthened the intensity of each body junction together, and the loss of strength of avoiding stress concentration that junction is caused.

3, because the silica gel mould of wall thickness such as employing designs, and when being heating and curing, silica gel evenly expands, the reinforcement yarn sheet can obtain uniform pressure, can not produce stress concentration.

Description of drawings

Fig. 1 is a scheme drawing of commonly using the product cycle frame;

Fig. 2 is the three-dimensional exploded view of cycle frame of the present invention;

Fig. 3 is the shaping schematic view of cycle frame of the present invention;

Fig. 3 A-3C is the locally-shaped scheme drawing of cycle frame of the present invention;

Fig. 4 is the scheme drawing of cycle frame of the present invention.

The specific embodiment

Below in conjunction with accompanying drawing method for making of the present invention is described in further detail.

As Fig. 2,3, and shown in Fig. 3 A-3C, at first with each body 1 of cycle frame, 2,3,4,5,6 carry out independent preforming respectively, the interface of each body is shaped to the shape of cooperation simultaneously, body 2 as shown in Figure 3A, 4 interface is made as deep-slotted chip breaker 21,41, then body 2,4 deep-slotted chip breaker 21,41 just in time are fastened on the body 3, body 2 shown in Fig. 3 B, 5 interface is made as deep-slotted chip breaker 22,52, then body 2,5 deep-slotted chip breaker 22,52 just in time are fastened on the body 1, body 3 shown in Fig. 3 C, 5 interface is made as deep-slotted chip breaker 31,52, then body 3,5 deep-slotted chip breaker 31,52 just in time are fastened on the body 6; Secondly junction of each body 1,2,3,4,5,6 adopt respectively adhesives carry out bonding after, again at junction parcel complex fiber material 7; At last the body that connects is inserted respectively among the little mould M of connection junction is carried out thermoset forming, the volume of this little mould M is little, its need can hold junction and get final product, even for ease of thermosetting, can be in little mould M adding wait the silica gel of wall thickness, utilize the principle of silica gel rising-heat contracting-cold, just the composite material thermally equivalent in the mould and solidifying.

It is emphasized that among the present invention, each body is the preforming mating interface in the junction, the interface of each body shown in Fig. 3 A, 3B, 3C is made as deep-slotted chip breaker, then the deep-slotted chip breaker of body coats complex fiber material 7 after just in time being fastened on and cooperating on the body again, need not be provided with again and coat complex fiber material again after the bonded assembly metal tube couples together the bonded assembly body, each body can utilize its preformed mating interface to be bonded together smoothly among the present invention, coats the complex fiber material thermoset forming at joint again and can realize connecting.

The cycle frame that adopts said method to make, it can make the intensity of each junction improve, and avoids the problem of stress concentration to take place, though owing to divide the body formed quantity of mould that makes to increase to some extent, but relative one large-scale mould, the manufacturing cost of little mould still reduce to some extent.For can being inserted the unitized frame after the moulding, vehicle frame external form standard carries out the integer processing in the integer mould.

Claims

1, a kind of method for making of cycle frame, its method for making is: at first be each body independent preforming respectively with vehicle frame; Secondly carry out reinforcement with extra complex fiber material again in the junction of each body, and at the junction application of adhesive; At last this is connect partly to insert and carry out thermoset forming in the little mould.

2, the method for making of cycle frame as claimed in claim 1 is characterized in that: when each body connects moulding, carry out thermoset forming with the silica gel mould that waits wall thickness.

3, the method for making of cycle frame as claimed in claim 1 is characterized in that: the unitized frame after connection is finished is inserted in the integer mould again and is fixed.

4, the method for making of cycle frame as claimed in claim 1 is characterized in that: the deep-slotted chip breaker that forms cooperation at the interface of each body.