CN110510044A - A kind of cycle frame and preparation method thereof - Google Patents

Abstract

The invention discloses a kind of cycle frame and preparation method thereof, head pipe and upper tube and down tube junction are provided with the water hole that disappears；Upper tube and standpipe junction are provided with upper tube standpipe end and disappear water hole；It is provided with the big axis down tube water hole that disappears on big shaft coupling be connected to down tube, the standpipe water hole that disappears is provided on big shaft coupling and is connected to standpipe, is provided with that lower bracket disappears water hole and lower bracket inside is connected on big shaft coupling；The present invention improves vehicle frame integral strength by the control to welding technique, by the way that all tubing of frame interior are connected to, increase the stability of heat treatment, and it can effectively mitigate vehicle frame overall weight, furthermore, the present invention is improved by the details welded and processed to vehicle, preferable raw material are provided for the subsequent further painting treatment of vehicle frame or assembling processing, and it is entirely existing common apparatus that the present invention program, which implements relied on ancillary equipment, only can effectively improve frame strength by the improvement of technological means.

Description

A kind of cycle frame and preparation method thereof

Technical field

The present invention relates to cycle frame technical fields more particularly to a kind of cycle frame and preparation method thereof.

Background technique

Known, in bicycle trade, for the more high-end type of sports bicycle of a part, more general at present is The vehicle frame of aluminum alloy material or carbon fibre materials, wherein the vehicle frame of aluminum alloy material have intensity height, low manufacture cost, can be again The characteristic made profits；The vehicle frame of carbon fibre materials has intensity height, light characteristic；According to current such respective characteristic of vehicle frame And cost of manufacture, aluminum alloy material is mostly used the bicycle art in normal domestic, and carbon fiber bicycle frame is mostly used in professional rank Match in.

Current Al-alloy bicycle vehicle frame need to be pursued more light-weighted while require better geometry in production Intensity, still, to guarantee frame strength, best improvement mode is exactly to increase tubing thickness, can be straight but increase tubing thickness Connecing causes vehicle frame weight to be promoted, and then causes vehicle is handling to substantially reduce, so reducing weight and improving integral strength There are contradictions on settling mode.

As industry technical staff, how to be improved by technology, by bicycle frame structure and soldering angle, Welding manner is improved, and is being reduced tubing thickness simultaneously as far as possible, is being further increased the weld strength of entire aluminium alloy bicycle frame It is existing industry technical staff technical problem urgently to be resolved.

Summary of the invention

In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of cycle frame and its production Method, the purpose is to pass through technological improvement, by improving to bicycle frame structure and soldering angle, welding manner, While reducing tubing thickness, the weld strength of entire aluminium alloy bicycle frame is further increased.

The technical solution adopted by the present invention to solve the technical problems is: a kind of cycle frame comprising upper tube is under Pipe, top tube and down tube are connected to one in right end by first pipe, and top tube and down tube are connected to one in left end by standpipe；Standpipe Left side be welded with upper bracket and lower bracket, upper bracket and lower bracket are soldered to one, the left end of down tube by rear iron in left end And the lower end of standpipe and the right end of lower bracket are connected to one by big shaft coupling, the upper bracket and lower bracket are in left end One is connected to by iron after one group of front and back setting；The first pipe and upper tube and down tube junction respectively correspond upper tube Lumen and the lumen of down tube are provided with first pipe and disappear water hole；The upper tube and standpipe junction is provided with upper tube standpipe end and disappears water Hole；It is provided with the big axis down tube water hole that disappears on the big shaft coupling to be connected to down tube, standpipe is provided on big shaft coupling and is disappeared water hole It is connected to standpipe, lower bracket is provided on big shaft coupling disappears and be connected to inside water hole and lower bracket；

The distance F of the upper tube and first pipe binding end, upper tube top distance first tube top end face is 8~9 millimeters；Described The distance E of down tube and first pipe binding end, down tube bottom end distance first tube bottom end face is 9~11 millimeters；The first pipe water hole that disappears is Two, corresponding top tube and down tube are centrally located respectively, and first pipe disappears the Edge Distance upper tube in water hole or lower bore must not be lower than 5 Millimeter, is the bigger the better under this constraint；

The top tube and down tube junction, after top tube and down tube are welded, between upper bottom of the tube and down tube top, on Weldering is extended using upper tube below pipe, the length N that upper tube extends weldering is 10~15 millimeters；

When the upper tube and standpipe combine, distance H≤standpipe diameter of the upper tube top apart from riser top ends；

Become conduit before the rear side of standpipe welds be provided with pull-up between two parties or in the rear side of big shaft coupling, on a lower bracket left side Become conduit before welding drop-down at the center of right branch；

The rear iron end welding of the upper bracket becomes conduit or welds at the rear iron end of lower bracket after being provided with one above Become conduit after being provided under one；Become after upper on upper bracket distance I of the conduit at rear ornamental work of iron drum center into 95~ Within the scope of 105 millimeters；The lower rear distance J for becoming conduit at rear ornamental work of iron drum center on lower bracket is 95~105 millimeter In range；

The rear iron is divided into two kinds, and one kind is iron after the moulding of forging formula, and one kind is iron after blanking type；Iron exists after forging formula Section is provided on towards the section of upper bracket and lower bracket to disappear water hole；Iron is matched with upper bracket and lower bracket welding after blanking type When conjunction, iron must select iron after short pin after blanking type, and the insertion end L of iron is 5~8 millimeters after the short pin；When upper branch When frame and lower bracket are in conjunction with iron after blanking type, iron end drills through side respectively on medial surface and disappears after upper bracket and lower bracket Water hole, the side iron end margin distance M after water hole centre distance upper bracket or lower bracket that disappears is 10-12 millimeters of ranges It is interior.

The upper tube and down tube is being provided with friction notch with first pipe binding end, and the friction notch is towards tubing Side is obliquely installed, and the depth for the notch that rubs is the half of the pipe thickness of upper tube or down tube.

When vehicle frame is sized as standpipe less than 16 inches, top tube and down tube and first pipe junction can have upper tube under The interference of pipe coats down tube into inside upper tube in such a way that upper tube cuts R mouthfuls for the generation for avoiding problem above, is carrying out It when down tube is in conjunction with first pipe, is corresponded on first pipe and carries out prewelding below the water hole that disappears of upper tube, down tube prewelding road length is 25 millimeters.

When the standpipe and big shaft coupling combine, standpipe and big shaft coupling carry out prewelding, and prewelding position is arranged in standpipe Front side, big axis down tube disappears the top in water hole, and the length of standpipe and the pre- solder joint of big shaft coupling is K >=15 millimeter.

In top tube and down tube and first pipe end binding site, down tube and first pipe junction use preceding benefit reinforced welding mode；Institute The preceding benefit reinforced welding mode specific structure stated are as follows: length is welded using fish scale weldering mode in down tube and first pipe junction, down tube bottom end The welding bead for the first time that degree is 15-17 millimeters, after welding, welding bead will be covered for the first time by 1/2 welding bead of secondary welding bead pressure down pipe side Lid, 1/2 welding bead of welding bead leakage for the first time, welding bead starting point and ending point are all capped for the first time.

Design has outer tube to be inserted into hole on the preceding change conduit, has a fan-shaped surface in the design of cable wire leading-out terminal, described One end diameter in fan-shaped surface towards outer tube insertion hole is smaller, becomes larger towards one end diameter of front derailleur.

When the standpipe is in conjunction with big shaft coupling, standpipe and big shaft coupling need on front side of big shaft coupling prewelding, prewelding it is long Spend K >=15 millimeter.

Cycle frame as described above, production method are as follows:

Step 1: materials and parts are prepared,

Upper tube: full inspection, two R mouthfuls of end mills, first pipe end lower section is secondary to rush R mouthfuls, and edging cleans；

Down tube: full inspection, two R mouthfuls of end mills bore nut bore and riveting nut, R mouthfuls of the secondary milling in standpipe end, edging, cleaning；

Standpipe: tubing is cut, and is saponified and is cleaned, and pipe, R mouthfuls of standpipe big shaft coupling end mill, preceding change conduit hard solder, auger shell mother are taken out Hole and riveting nut, cleaning；

Head pipe: materials when materials, increase by two millimeters on the basis of practical first length of tube and cut, turning, and punching disappears water hole, Cleaning；

Big shaft coupling: materials when materials, increase by two millimeters on the basis of practical first length of tube and cut；The water that disappears is bored in turning Hole rolls cycle serial number, cleaning:

Upper rear support: full inspection, rear iron end are flattened or are cut tiltedly, and the water hole that disappears, cleaning are bored；

Rami posterior inferior frame: full inspection, rear iron end are flattened or are cut tiltedly, and the water hole that disappears, cleaning are bored；

Top connection: full inspection, cleaning；

Lower contact: full inspection, cleaning；

Step 2: Vee formation combines,

By upper rear support and rami posterior inferior frame in conjunction with rear iron, Vee formation combination prewelding, top connection is welded entirely, and lower contact is complete Weldering, Vee formation correction, the rear conduit that becomes weld, R mouthfuls of lower bracket big shaft coupling end mill, R mouthfuls of upper bracket big shaft coupling end mill, then Burr removal is removed, is cleaned, cleaning described in this step is identical with the cleaning way that materials and parts prepare step；

, need to be in closed welding region using argon protection welding mode when carrying out Vee formation combination, when welding, welds The selection of electromechanics stream is selected according to actual (real) thickness, table specific as follows；Use welding rod for 4043 models, 2.4 millimeters of diameter, tungsten Stick chooses 2.4 millimeters of tungsten bars of diameter, it is ensured that welding wire surface is clean；The distance between tip and weldment are maintained at 1.5 millis when welding In rice range, when disposably welding is unable to complete at binding site, arc welding can not be played in same arcing point

Step 3: front triangle combines,

Standpipe and big shaft coupling prewelding, the down tube that welding position is located at big shaft coupling disappear above water hole, and weld length K >= 15 millimeters；

Upper tube and the welding of standpipe complete cycle, distance H≤standpipe diameter of the upper tube top apart from riser top ends, the standpipe are straight Diameter is 31.8 millimeters or 34.9 millimeters；Big shaft coupling and down tube complete cycle are welded；It is carried out in front triangle first time after welding Heart calibration；

Down tube and first pipe prewelding sizing, down tube upper end prewelding length are 25 millimeters；Upper tube and first pipe complete cycle welding, welding When, the distance F in upper tube and first pipe binding end top edge distance first tube top portion is 8-9 millimeters, and down tube and first pipe complete cycle are welded, down tube The distance E of bottom end distance first tube bottom end face is 9~11 millimeters；

Using extending welding bead in the angle of upper tube and down tube junction, when the described extension pass weld, first with common Welding manner is connected using 4043 welding electrodes and realizes fish scale weldering in down tube bonding gap, 4047 welding rods then used instead, in upper tube two Secondary to rush R mouthfuls of edges and weld to standpipe direction, welding bead starting point overlaps former 1/2 welding bead when welding, and welding bead length is 10~15 millimeters, weldering After connecing, welding wire is not used, only welding gun swings arc on the extension welding bead for extending welding using 4047, will extend welding bead and wipes out；

In down tube and first pipe junction, down tube lower end uses preceding benefit reinforced welding mode；The preceding benefit reinforced welding side Formula specific structure are as follows: down tube and first pipe junction, down tube bottom end use fish scale to weld mode weld length as 15-17 millimeters for the first time Welding bead after welding, welding bead will be covered, welding bead leakage for the first time 1/2 for the first time by 1/2 welding bead of secondary welding bead pressure down pipe side, Welding bead starting point and ending point are capped for the first time；

Second of center calibration of front triangle is carried out after welding；

Step 4: vehicle frame total binding,

In standpipe and upper bracket junction prewelding, big shaft coupling and lower bracket joint prewelding, after prewelding, after progress The calibration of triangle center；Standpipe welds entirely with upper bracket, and big shaft coupling welds entirely with lower bracket joint；Welding bead full inspection；

Step 5: vehicle frame heat treatment,

Vehicle frame is hung on T4 frame, is managed into T4 furnace treatment, heat treatment temperature ascending curve such as Figure 21:

Whole vehicle center calibration；Iron centre bore adjusts eye afterwards；Take turns gap adjustment；

It is managed into T6 furnace treatment, heat treatment temperature is ascending curve such as Figure 22:

The big flat processing of shaft coupling end left and right ends milling；First pipe bore hole end face milling；Standpipe fraising and column rule are examined.

The cleaning of the materials and parts preparatory stage include the following steps: → 3. washing → 4. of the washing of 1. degreasings → 2. neutralize → 5. → 6. washing of washing；

1. degreasing: piece alkali concentration: 45%~60%, solution temperature: 50~70 DEG C, soaking time: ± 0.5 minute 2 minutes, Water: 2/3 slot, material can be flooded for standard；

2. washing: 100% tap water, temperature: room temperature, the time: ± 0.5 minute 1 minute, water: tankful；Overflow when washing And convection current；

3. washing: 100% tap water, temperature: room temperature, the time: ± 0.5 minute 1 minute, water: tankful；Overflow when washing And convection current；

4. neutralizing: 5% nitric acid, temperature: room temperature, the time: ± 0.5 minute 2 minutes, water: 2/3 slot, material can be flooded It is not standard；Convection current when immersion；

5. washing: 100% tap water, temperature: room temperature, the time: ± 0.5 minute 1 minute, water: tankful；Overflow when washing And convection current；

6. washing: 100% tap water, temperature: 60 DEG C or more, the time: ± 0.5 minute 2 minutes, water: tankful, can incite somebody to action Material floods for standard, overflow and convection current when washing.

The standpipe take out Guan Qianxu through process saponification and cleaning specifically comprise the following steps: 1. degreasings → 2. → 6. washing → 7. temperings → 8. degreasings of → 5. washing of washing → 4. neutralization of → 3. washing → → 10. washing of 9. washing → 11. neutralizing → 17. saponification → 18. concave heads processing of → 13. → 14. epitheliums of washing of → 12. washing → → 16. washing of 15. washing；

1. degreasing: piece alkali concentration: 45%~60%, solution temperature: 50~70 DEG C, soaking time: ± 0.5 minute 2 minutes, Water: 2/3 slot, material can be flooded for standard；

2. washing: 100% tap water, temperature: room temperature, soaking time: ± 0.5 minute 1 minute, water: tankful, can incite somebody to action Material floods for standard；Overflow and convection current when washing；

3. washing: 100% tap water, temperature: room temperature, soaking time: ± 0.5 minute 1 minute, water: tankful, can incite somebody to action Material floods for standard；Overflow and convection current when washing；

4. neutralizing: 5% nitric acid, temperature: room temperature, soaking time: ± 0.5 minute 2 minutes, water: 2/3 slot, with can be by object Material floods for standard, convection current when immersion；

5. washing: 100% tap water, temperature: room temperature, soaking time: ± 0.5 minute 1 minute, water: tankful, can incite somebody to action Material floods for standard；Overflow and convection current when washing；

6. washing: 100% tap water, temperature: 60 DEG C or more, soaking time: ± 0.5 minute 2 minutes, water: tankful, with Material can be flooded for standard；

7. tempering: 6061 material tempering hardnesses between 0~2 degree, 7005 material tempering hardnesses between 5~8 degree, 6066 material tempering hardnesses are between 5~9 degree；

8. degreasing: piece alkali concentration: 45%~60%, solution temperature: 50~70 DEG C, soaking time: ± 0.5 minute 2 minutes, Water: 2/3 slot, material can be flooded for standard；

9. washing: 100% tap water, temperature: room temperature, soaking time: ± 0.5 minute 1 minute, water: tankful, can incite somebody to action Material floods for standard；Overflow and convection current when washing；

10. washing: 100% tap water, temperature: room temperature, soaking time: ± 0.5 minute 1 minute, water: tankful, can incite somebody to action Material floods for standard；Overflow and convection current when washing；

It neutralizes: 5% nitric acid, temperature: room temperature, soaking time: ± 0.5 minute 2 minutes, water: 2/3 slot, with can be by object Material floods for standard；Overflow and convection current when washing；

Washing: 100% tap water, temperature: room temperature, soaking time: ± 0.5 minute 1 minute, water: tankful, can incite somebody to action Material floods for standard；Overflow and convection current when washing；

Washing: 100% tap water, temperature: 60 DEG C or more, soaking time: ± 0.5 minute 2 minutes, water: tankful, with Material can be flooded for standard；Overflow and convection current when washing；

Epithelium: the full acidity of epithelium: 25~50 points, temperature: 80 DEG C or more, soaking time: ± 0.5 minute 2 minutes,

3/4 slot, can flood material for standard；

Washing: 100% tap water, temperature: room temperature, soaking time: ± 0.5 minute 2 minutes, water: tankful, can incite somebody to action Material floods for standard；Overflow and convection current when washing；

Washing: 100% tap water, temperature: room temperature, soaking time: ± 0.5 minute 2 minutes, water: tankful, can incite somebody to action Material floods for standard；Overflow and convection current when washing；

Saponification: pH value: 8~11, temperature: 85 ± 5 DEG C, the time: ± 0.5 minute 2 minutes, water: 2/3 slot, can incite somebody to action Material floods for standard；

Concave head: 45~80 degree of concave head angular range, length about 5MM.

The invention has the following advantages: the present invention designs through the above structure and production method, by welding skill The control of art improves vehicle frame integral strength, is connected to by all tubing of frame interior, can effectively reduce complete vehicle weight, increases heat The stability of processing, and effectively mitigate vehicle frame overall weight in the manufacture of high-end Al-alloy bicycle, furthermore, the present invention passes through The details welded and processed to vehicle improves, handled for the subsequent further painting treatment of vehicle frame or assembling provide compared with Good raw material, and it is entirely existing common apparatus that the present invention program, which implements relied on ancillary equipment, only passes through technology hand The improvement of section can effectively improve frame strength, be a kind of ideal cycle frame and preparation method thereof.

Detailed description of the invention

Present invention will be further explained below with reference to the attached drawings and examples；

Fig. 1 is product of the present invention structural schematic diagram；

Fig. 2 is product of the present invention rear triangular structure schematic diagram；

Fig. 3 is iron and upper bracket and lower bracket combination schematic diagram behind the region D in Fig. 2；

Fig. 4 is iron schematic perspective view after forging formula moulding of the present invention；

Fig. 5 is standpipe of the present invention and big shaft coupling prewelding structural schematic diagram I；

Fig. 6 is standpipe of the present invention and big shaft coupling welding structure schematic diagram II；

Fig. 7 is standpipe of the present invention and big shaft coupling prewelding side structure schematic view；

Fig. 8 is a-quadrant structural schematic diagram in Fig. 1 of the present invention；

Fig. 9 is C regional structure schematic diagram I in Fig. 1 of the present invention；

Figure 10 is C regional structure schematic diagram II in Fig. 1 of the present invention；

Figure 11 is B area structural schematic diagram in Fig. 1 of the present invention；

Figure 12 is top tube and down tube of the present invention in first pipe end integrated structure schematic diagram I；

Figure 13 is top tube and down tube of the present invention in first pipe end integrated structure schematic diagram II；

Figure 14 is to mend reinforced welding step I before main view direction down tube of the present invention is managed with head；

Figure 15 is to mend reinforced welding step II before main view direction down tube of the present invention is managed with head；

Figure 16 is to mend reinforced welding step I before side-looking direction down tube of the present invention is managed with head；

Figure 17 is to mend reinforced welding step II before side-looking direction down tube of the present invention is managed with head；

Figure 18 is that fish scale of the present invention welds welding bead specification；

Figure 19 is upper tube edging schematic diagram of the present invention；

Figure 20 is G regional structure schematic diagram in Figure 19；

Figure 21 is that T4 furnace treatment manages temperature rising curve figure；

Figure 22 is that T6 furnace treatment manages temperature rising curve figure:

In figure, 1, first pipe, 2, upper tube, 3, down tube, 4, standpipe, 5, big shaft coupling, 6, upper bracket, 7, rear iron, 8, lower bracket, 9, become conduit after upper, 10, become conduit before pull-up, 11, become conduit before drop-down, 12, it is lower after become conduit, 13, fan-shaped surface, 14, first pipe End upper tube disappears water hole, 15, first pipe end down tube disappear water hole, 16, the pre- welding bead of down tube, 17, preceding benefit reinforcement welding bead, 18, side disappear water hole, 19, outer tube is inserted into hole, 20, insertion end, 21, friction notch, 22, standpipe and the pre- solder joint of big shaft coupling, 23, top connection, 24, under connect Head, 25, upper tube standpipe end disappear water hole, 51, big axis down tube disappear water hole, 52, standpipe disappear water hole, 53, lower bracket disappear water hole, 71, cut Face disappears water hole.

Specific embodiment

Careful description is carried out to the present invention below, those skilled in the art can be light by content disclosed by this specification It changes places and understands other advantages and efficacy of the present invention.

Shown in reference to the accompanying drawings: a kind of cycle frame, as depicted in figs. 1 and 2 comprising upper tube 2 and down tube 3,2 He of upper tube Down tube 3 is connected to one, upper tube 2 and down tube 3 in right end by first pipe 1 and is connected to one in left end by standpipe 4, described herein Connection be argon arc welding protectiveness welding, all components described in following specific embodiments are aluminum alloy material； The left side of the standpipe 4 is welded with upper bracket 6 and lower bracket 8, and upper bracket 6 and lower bracket 8 are soldered in left end by rear iron 7 The right end of one, the left end of down tube 3 and the lower end of standpipe 4 and lower bracket 8 is connected to one by big shaft coupling 5, described Upper bracket 6 and lower bracket 8 iron 7 after one group that left end is arranged by front and back are connected to one；The first pipe 1 and upper tube 2 with And 3 junction of down tube respectively corresponds the lumen of upper tube 2 and the lumen of down tube 3 is provided with first pipe and disappears water hole, described two first pipes Pipe end upper tube disappears water hole 14 headed by water hole disappear respectively and first pipe end down tube disappears water hole 15；4 junction of upper tube 2 and standpipe Upper tube standpipe end is provided with to disappear water hole 25；The big axis down tube water hole 51 that disappears is provided on the big shaft coupling 5 to be connected to down tube 3, It is provided with the standpipe water hole 52 that disappears on big shaft coupling 5 be connected to standpipe 4, lower bracket is provided on big shaft coupling 5 and disappears water hole 53 under It is connected to inside bracket 8；By the above structure setting, product of the present invention is whole by the internal cavity of all tubing of entire vehicle frame Connection, purpose of design are in existing integrally-built technical foundation, by the design in the water hole that disappears by the overall weight of vehicle frame It reduces, while by the penetrating connection of tubing inside vehicle, in the manufacturing process of subsequent semi-finished product vehicle frame and finished product vehicle frame in fact Existing inside and outside is thoroughly cleaned, and prevents vehicle frame surface from hanging the dirty and subsequent painting effect of influence.

Considered for vehicle frame integral strength, in Vehicle Frame Design and production, as shown in figure 11, the upper tube 2 with The distance F of first 1 binding end of pipe, the top end face of the first pipe 1 of 2 top of upper tube distance is 8 millimeters；The knot of the down tube 3 and first pipe 1 End is closed, the distance E of the bottom end distance first tube bottom end face of down tube 3 is 10 millimeters, if front fork overturns gap after installing front fork on first pipe Under situation that meet national standards, the size minimum of E can be designed to 9 millimeters, and such design method can be by front triangle weld size Amplify as far as possible, that is to say, that for top tube and down tube as far as possible to upper and lower separation, size of separation is bigger, impact resistance and anti- Fatigability is stronger.

As described above, the water hole that disappears on first pipe 1 is two, respectively headed by pipe end upper tube disappear under water hole 14 and first pipe end Pipe disappears water hole 15, and two water holes that disappear correspond to upper tube 2 herein and down tube 3 is centrally located respectively, to correspond to the first pipe end upper tube of upper tube Disappear for water hole 14, first pipe end upper tube disappear water hole 14 Edge Distance on bore must not be lower than 5 millimeters, because of common fish scale welding bead Width at 8~10 millimeters, after welding bead and tubing welding, welding range≤1/2 fish scale welding bead width, the thus above weldering Such design method in road can avoid welding bead welding range and fall into disappearing in water hole and cause welding defect, constrain in conditions above Under be the bigger the better.

In use, 1 position of first pipe will receive the impact on front side of ground and vehicle frame moving direction to vehicle frame, this Part of impact force will cause under continuing force frame front triangle tubing it is cracked in addition fracture, actually riding and simulating In test, can be confirmed that two places are the most easily damaged position of vehicle frame, be upper tube 2 and 3 junction of down tube and down tube 3 respectively with Below the down tube of first 1 binding site of pipe；In order to avoid the appearance of problem above, this vehicle frame has done technology in the Vehicle Frame Design stage Adjustment, as shown in Figure 9 and Figure 10, in order to further increase the integral strength of vehicle frame, 3 junction of the upper tube 2 and down tube, on After pipe 2 and down tube 3 are welded, between 3 top of 2 bottom of upper tube and down tube, weldering is extended using upper tube below upper tube 2, it is described The specific structure of upper tube extension welding bead are as follows: on the welding bead for the first time of top tube and down tube bonding gap, rush R mouthfuls of sides along upper tube is secondary Edge welds secondary welding bead to standpipe direction, and the length N that upper tube extends welding is 15 millimeters, extends secondary welding bead after welding Region is wiped out.

In down tube 3 and first pipe end binding site, down tube 3 and first 1 junction of pipe use preceding benefit reinforced welding mode；Described The preceding specific structure for mending reinforced welding are as follows: on the welding bead for the first time of down tube and first pipe junction, pass through secondary welding bead pressure down pipe side 1/2 welding bead welding bead will cover for the first time, and 1/2 welding bead of welding bead leakage for the first time, the starting point of welding bead and ending point are by secondary welding bead for the first time Covering.

In fig. 1, when the upper tube 2 and standpipe 4 combine, the distance H on top of the top of upper tube 2 apart from standpipe 4 ≤ 1.5 times of standpipe diameters, general standpipe diameter is 31.8 millimeters or 34.9 millimeters at present, thus H be worth setting lower limit according to Depending on actual riser diameter, such purpose of design is, because the inner tip of standpipe 4 is to insert the seat pipe use of cushion, seat pipe Highest safety line, the setting height≤1.5 times standpipe diameter at highest safety line block distance tube bottom end, most can be designed in setting It is the adjustable range of safe altitude in high safety line to cushion bottom section, if hoisting depth is more than safety line, the personnel of riding are ridden Row is when having an effect, and seat pipe bottom is ridden the biggish power of personnel, and the direction of power tube bottom end of being present is directed towards upper tube direction, passes through Power is kept out in the reaction of upper tube 2, be can ensure that deform within the scope of seat pipe and standpipe plug-in mounting region at this time and even be damaged；If seat Tube bottom end exceeds highest safety line when being inserted into standpipe, seat pipe bottom end exceeds upper tube region, when the personnel of riding, which ride, to be had an effect, upper tube Region can not keep out power, can directly result in the deformation of riser top neighboring area and even damage.

Current such bicycle majority will be installed front derailleur, can generally use the front derailleur of pull-up mode, design Person can become conduit 10 before the rear side of standpipe 4 welds setting pull-up between two parties, can be realized by way of pull-up to front derailleur Drawing, but such design method influence it is beautiful, furthermore, cable wire exposure on rear side of standpipe is more, to a certain extent there is also Security implication, present application propose new design scheme, and with current auspiciousness Ma promise or speed connection etc., well-known speed changer manufacturer is pushed away The front derailleur of drop-down form out, as shown in Figure 1, being proof strength and being designed beautifully and concealment, in big shaft coupling 5 Rear side becomes conduit 11 before welding drop-down at the center of 8 or so branch of lower bracket, by position more covert here to weld The fixed drop-down of mode before become conduit 11, it can be achieved that front derailleur control concealment and safety and firmness, reduce simultaneously Route on standpipe keeps vehicle frame whole more succinct.

Current such bicycle majority will be installed Rear Derailleur, by testing and actually using for a long time, this Shen Please case the welding of the rear iron end of upper bracket 6 be provided with one it is upper after become conduit 9 or welding is provided at the rear iron end of lower bracket 8 Become conduit 12 after under one；Upper rear distance I of the conduit 9 at rear ornamental work of iron drum center that become on upper bracket 6 is 100 milli Rice；The lower rear distance J for becoming conduit 12 at rear ornamental work of iron drum center on lower bracket 8 is 100 millimeter；The above length is set It postpones, after conduit extends from upper rear change conduit 9 or lower rear change conduit 12, is again introduced into Rear Derailleur inside, Smoothly bending can be achieved in the length of 100 millimeters of ranges to turn to, while 100 millimeters of cable wire outer tube will not be due to too long Influence the smooth drawing activity of cable wire inside it.

Rear iron form design needed for vehicle frame is two kinds by present design, iron and blanking type respectively after forging formula moulding Iron after moulding, iron is also general on current vehicle frame after this two kinds, and design focal point of this programme on rear iron is: as schemed Shown in 4, iron is disappearing water hole 71 towards being provided with section on the section of upper bracket 6 and lower bracket 8 after forging formula, when after 7 He of iron After upper bracket 6 or lower bracket 8 weld, the section water hole 71 that disappears can ensure that besides portion penetrates through for upper bracket 6 and lower bracket 8, Vehicle frame can be prevented in subsequent heat treatment because bursting caused by tubing inner sealing, meanwhile, it can also be before vehicle frame carries out coating When cleaning, all medicaments in vehicle frame inside and outside are discharged completely, prevent quick-fried paint after coating caused by due to medicament discharge is not clean； When iron and the welding of upper bracket 6 and lower bracket 8 cooperate after blanking type, as shown in Fig. 3, after iron must select short pin after blanking type Iron, the insertion end L of iron is 5~8 millimeters after the short pin, be with 7 millimeters it is best, when upper bracket 6 and lower bracket 8 with rush When iron combines after sanction formula, the rear iron end of upper bracket 6 and lower bracket 8 drills through side respectively on medial surface and disappears water hole 18, described The disappear distance M of the centre distance upper bracket 6 in water hole 18 or the rear iron end margin of lower bracket 8 of side be 10~12 millimeters of ranges It is interior, it is best with 10 millimeters；The purpose of such design is that vehicle frame needs to clean by medical fluid before coating, in cleaning process end, Frame interior and the medicament of outside need to all be emptied by using the mode that vehicle frame is hung, hang general at present is to adopt The hanging that vehicle frame is realized with the mode for hanging first pipe 1 sets side end edge of the water hole 18 as far as possible close to rear iron 7 that disappear It sets, the liquid storage gap of vehicle frame upper bracket 6 and lower bracket 8 at rear iron 7 can be effectively reduced, while iron 7 after guaranteeing also being needed to insert Enter the depth to upper bracket 6 and lower bracket 8, if insertion depth is too short, it is too low to directly result in weld strength, so the application Iron is best design after short pin designed by case.

As illustrated in figures 19 and 20, upper tube 2 and down tube 3 are being provided with friction notch 21 with first 1 binding end of pipe, described Friction notch 21 is obliquely installed towards tubing side, and the depth of friction notch 21 is the one of the pipe thickness of upper tube or down tube Half, Figure 19 and Figure 20 are by taking top tube as an example, and the setting depth of friction notch 21 is the half of 2 pipe thickness of upper tube, grinding After by mutually passing through cooperation with tubing, the barbed portion that rubs can effectively increase for electrode fill composition welding use, such mode Intensity after adding tubing to weld.

Be arranged for different heights, vehicle frame can be set according to the height of standpipe 4 be arranged 15,16,17,18,19,20,21, 22,23 inches, while 4 elevated height of seat tube, the size that upper tube 2 and down tube 3 are combined with first pipe 1 is also to be gradually increased , as shown in figures 9 and 11, the combination of upper tube 2 and first pipe 1, the combination of down tube 3 and first pipe 1 are not in interference phenomenon, but It is, when vehicle frame is sized as standpipe height less than 16 inches, as shown in Figure 10,1 junction of upper tube 2 and down tube 3 and first pipe There can be the interference of upper tube 2 Yu down tube 3, be combined upper tube 2 with first pipe 1 in upper tube processing for the generation for avoiding problem above The excision of R mouth after, then in such a way that upper tube head pipe end bottom cuts R mouthfuls, the purpose is to match down tube 3 and upper tube 2 in upper tube The R mouth of conjunction is processed, and after the completion of this step, can be coated down tube 3 into the inside of upper tube 2 and then be welded, such structure with And the globality for not destroying down tube that the setting purpose of operation mode is to try to, because vehicle is in ride, down tube 3 is as punching The component that is primarily subjected to of power is hit, the permanent guarantor for guaranteeing to can be realized vehicle frame when normally riding while 3 intensity of down tube is solid.

When aluminium alloy bicycle frame makes, complete cycle welding is carried out in the gap of each tubing junction can be realized the intensity of vehicle frame Guarantee, still, for rider in force, tubing and the unwelded part in tubing junction can generate small friction, such to rub Wiping can generate abnormal sound, influence to ride effect；Present application spy is carrying out down tube 3 and head for vehicle frame of the standpipe height less than 16 cun When pipe 1 combines, prewelding is carried out below the water hole that disappears that correspond to upper tube 2 on first pipe 1, down tube prewelding road length is 25 millimeters；With same The design reason of sample when the standpipe 4 and big shaft coupling 5 of the vehicle frame of all models combine, standpipe 4 is carried out with big shaft coupling 5 pre- Weldering, the top in the front side of standpipe 4 is arranged in prewelding position, big axis down tube disappears water hole 51, standpipe 4 and the pre- solder joint 22 of big shaft coupling Length K >=15 millimeter, do not influence complete cycle welding under the premise of K value setting value be the bigger the better, with this prevent tubing and pipe The friction of material junction and the generation of noise.

On vehicle frame as described above, after becoming conduit before welding, it can all be cooperated on preceding change conduit by cable wire and outer tube The control realized to front derailleur is set, either becomes conduit 10 before pull-up of the design on standpipe or is arranged in big shaft coupling On drop-down before become conduit 11, as shown in figure 8, pull-up before become conduit 10 on design have outer tube be inserted into hole 19, in cable wire leading-out terminal Design has a fan-shaped surface 13, and one end diameter in the fan-shaped surface 13 towards outer tube insertion hole 19 is smaller, towards front derailleur One end diameter become larger because the bracing wire position on front derailleur always with become conduit 10 before pull-up there is angle, cable wire warp When crossing change conduit drawing front derailleur before pulling up, meeting stress friction at change conduit outlet directly before pull-up not only influences cable wire Drawing smooth degree, while being also easy to cause cable wire is impaired to be even broken；By such design method, though front derailleur with Becoming conduit 10 before pull-up, there is angles, and cable wire is when becoming conduit 10 before leaving pull-up, 13 CONTACT WITH FRICTION of cable wire and fan-shaped surface, Friction can be reduced, the rate of wear of cable wire is greatly reduced, more avoid the wear and rupture of cable wire.

Cycle frame as described above, production method have biggish for the production method of more current aluminium alloy bicycle frame Change.Embodiment will be illustrated explanation so that standpipe height is 15 cun of small size vehicle frame as an example:

Production method embodiment:

Step 1: materials and parts are prepared,

Upper tube: 2 full inspection of upper tube mills R mouthfuls of machines using double end and carries out the R mouthfuls of operations of first pipe end and standpipe end mill simultaneously, can avoid Skew is combined caused by first pipe end and two R mouthfuls of standpipe end mill of angle are inconsistent；It is secondary below first pipe end to rush R mouthfuls, because upper The combination angle of pipe 2 and down tube 3 is smaller, and using the interference rushed between the avoidable tubing clamping of R mouthfuls of techniques and cutter, rub notch It is cleaned after 21 grindings；

Down tube: 3 full inspection of down tube mills R mouthfuls of machines using double end and carries out first pipe end and the R mouthfuls of operations of milling of five go sides, bores nut bore simultaneously Riveting nut is installed and used for kettle-frame, and R mouthfuls of the secondary milling in standpipe end remove standpipe 4 and 3 interference portion of down tube, and friction lacks It is cleaned after 21 grinding of mouth；

Standpipe: tubing is cut, and aluminium alloy bicycle frame is that loss of weight processing is carried out within the scope of intensity requirement at present, it will usually be reduced Standpipe wall thickness, but such operate will affect the bulk strength of vehicle, to avoid such mode, present application propose it is a kind of compared with For novel design method, i.e., standpipe is carried out taking out pipe operation, realizes that 4 tubing both ends of standpipe are thicker, intermediate by tube drawing machine tool The relatively thin special processing of wall thickness after being first saponified tubing, carries out pumping pipe to tubing, carries out grinding again after taking out pipe clear It washes, it is R mouthfuls of shaft coupling end mill big using R mouthfuls of machines progress standpipes of single head milling, become the hard solder of conduit 10 before pulling up, brill nut bore simultaneously rivets Standpipe kettle nut, cleaning；

Head pipe: materials when materials, increase by two millimeters of machining allowance, two millis on the basis of practical first length of tube Each reserved 1 millimeter in the top and bottom of first pipe 1 of the machining allowance of rice, reserved machining allowance can after vehicle frame makes, Face milling processing is carried out after vehicle frame T6 processing sizing, first Guan Chong disappears water hole, cleaning；

Big shaft coupling: materials when materials, increase by two millimeters of machining allowance on the basis of the length of practical big shaft coupling 5, Two millimeters of surplus is each 1 millimeter reserved in big 5 front end face of shaft coupling and rear end face, and reserved machining allowance can make in vehicle frame Bi Hou carries out face milling processing after vehicle frame T6 processing sizing；The shape and internal diameter turnery processing, punching machine of big shaft coupling 5 add Work disappears water hole, rolls cycle serial number, and cleaning is stand-by:

Upper rear support: 6 full inspection of upper rear support can be for upper rear support 6 and rear iron 7 according to iron after forging formula moulding Contact surface carries out inclined-plane and cuts, and cleans after cutting stand-by；According to iron after blanking type moulding, punching machine is first passed through to upper rear support Iron end carries out flattening operation afterwards, it is therefore an objective to which 7 end of iron is inserted after going out to be suitble to by round or rectangular even special-shaped tube stamping The gap entered, to guarantee welding gap uniformly and welding rod can easily realize that gap blocks, such mode can be in a certain range Increase Frame Welding intensity；It is that the water hole that disappears is bored at 10 millimeters in the inside of upper rear support 6, the distance M of rear iron end margin, cleaning For use；

Rami posterior inferior frame: rami posterior inferior frame full inspection can be for rami posterior inferior frame 8 and rear iron 7 according to iron after forging formula moulding Contact surface carries out inclined-plane and cuts, and cleans after cutting stand-by；According to iron after blanking type moulding, punching machine is first passed through to rami posterior inferior frame 8 Rear iron end carry out flattening operation, it is therefore an objective to 7 end of iron after going out to be suitble to by round or rectangular even special-shaped tube stamping The gap of insertion, to guarantee that welding gap is uniform and welding rod can easily realize that gap blocks, such mode can a certain range Interior increase Frame Welding intensity；It is that the water hole that disappears is bored at 10 millimeters in the inside of rami posterior inferior frame 6, the distance M of rear iron end margin, clearly It washes stand-by；

Top connection: precision full inspection, cleaning are stand-by；

Lower contact: precision full inspection, cleaning are stand-by；

Step 2: Vee formation combines,

Upper rear support 6 and rami posterior inferior frame 8 are combined with rear iron 7, Vee formation combination prewelding, top connection is welded entirely, lower contact Full weldering, Vee formation correction, according to various forms of Rear Derailleurs selections of arranging in pairs or groups welded in upper rear support 6 it is upper after become conduit 9 or Person's rear change conduit 12 under being welded on rami posterior inferior frame 8, R mouthfuls of lower bracket big shaft coupling end mill, R mouthfuls of upper bracket big shaft coupling end mill, Then Burr removal is removed, is cleaned, cleaning described in this step is identical with the cleaning way that materials and parts prepare step；

, need to be in closed welding region using argon protection welding mode when carrying out Vee formation combination, when welding, welds The selection of electromechanics stream is selected according to actual (real) thickness, and upper tube selects 1.3 mm of thickness, and down tube selects 2.0 mm of thickness, and standpipe is selected 1.4 mm of thickness, table specific as follows；Use welding rod for 4043 models, 2.4 millimeters of diameter, tungsten bar chooses 2.4 millimeters of tungsten of diameter Stick, it is ensured that welding wire surface is clean；The distance between tip and weldment are maintained in 2.0-2.5 millimeters of ranges when welding, in this model Receipts acnode should be slightly less than by enclosing interior starting the arc point height, can not be in same arcing point when disposably welding is unable to complete at binding site Arc welding is played, because arcing point has higher temperature, is easy to make materials in the tube the drawbacks of overheat carbonization occur, when welding is avoided as far as possible same The starting the arc at a little prevents materials in the tube to be carbonized and reduce intensity.

Vee formation cleaning；

Step 3: front triangle combines,

5 prewelding of standpipe 4 and big shaft coupling, the upper of water hole 51 that the front side of standpipe 4 is arranged in prewelding position, big axis down tube disappears Side, length K >=15 millimeter of standpipe 4 and the pre- solder joint 22 of big shaft coupling, the setting of K value under the premise of not influencing complete cycle welding Value is the bigger the better, and prevents tubing and the friction of tubing junction and the generation of noise with this.

The clip of upper tube 2, down tube 3, first pipe 1 and standpipe 4 and big shaft coupling 5 is placed on front triangle welding bench, is adjusted 2-3 flap will be welded at the tie point of each materials in the tube of front triangle after whole good soldering angle, by front triangle preceding after welding It is removed on triangle welding bench.

Upper tube 2 and standpipe 4 carry out complete cycle welding, it is ensured that distance H≤1.5 times standpipe of 2 top of upper tube apart from 4 top of standpipe Diameter, and measurement confirmation before welding, the diameter of standpipe 4 general at present are 31.8 millimeters or 34.9 millimeters；Big shaft coupling 5 It is welded with 3 complete cycle of down tube；After welding carry out front triangle first time center calibration, it is therefore an objective to ensure first pipe 1 center line and The center line of upper tube 2 and the center line of down tube 3 are in the same plane；

Down tube 3 and first pipe 1 weld, and the first pipe end upper end prewelding length of down tube 3 is 25 millimeters；Upper tube 2 and first 1 complete cycle of pipe weldering It connects, when welding, as shown in Figure 1, the distance F at upper tube 2 and first 1 top of pipe of 1 binding end top edge of first pipe distance is 8~9 millimeters, It is preferred that 8 millimeters；Down tube 3 and first 1 complete cycle of pipe are welded, and the distance E of 3 bottom end of down tube distance, 1 bottom face of first pipe is 9~11 millimeters, excellent Select 9 millimeters.

Using extending welding bead in the angle of upper tube 2 and 3 junction of down tube, when the described extension pass weld, first with general Logical welding manner, welding current is adjusted to 180A when welding；It is connected in down tube bonding gap using 4043 welding electrodes and realizes fish scale Weldering, then uses 4047 welding rods instead, rushes R mouthful edges and welds to standpipe direction upper tube is secondary, welding bead starting point overlap joint former 1/2 when welding Welding bead, welding bead length are 10~15 millimeters, after welding, do not use welding wire, and only welding gun is extending welding using 4047 welding rods Extension welding bead on swing arc, by extend welding bead wipe out；

In 1 junction of down tube 3 and first pipe, 3 lower end of down tube uses preceding benefit reinforced welding mode；The preceding benefit reinforced welding Mode specific structure are as follows: as shown in Figure 16 and Figure 17,1 junction of down tube 3 and first pipe, 3 bottom end of down tube is welded using fish scale weldering mode The welding bead for the first time that spreading degree is 15-17 millimeters, welding manner are as shown in figure 16；After welding, pass through secondary welding bead pressure down pipe 1/2 welding bead of side welding bead will cover for the first time, welding bead leakage for the first time 1/2, and welding bead starting point and ending point are capped for the first time, welding side Formula is as shown in figure 17；

Second of center calibration of front triangle is carried out after welding, it is therefore an objective in the center line and upper tube 2 for ensuring first pipe 1 Heart line and the center line of down tube 3 in the same plane, combine for vehicle and do further preparation；

Front triangle cleaning；

Step 4: vehicle frame total binding,

In standpipe 4 and 6 junction prewelding of upper bracket, big shaft coupling 5 and 8 joint prewelding of lower bracket, after prewelding, into The calibration of row Vee formation center；Standpipe 4 and upper bracket 6 weld entirely, and big shaft coupling 5 welds entirely with 8 joint of lower bracket；Welding bead full inspection, inspection It looks into the presence or absence of trachoma, dry joint, solder skip；

The length for the fish scale weldering being previously mentioned in all the above welding sequence is carried out under certain welding standard, Its welding standard is as shown in figure 18, is the setting of 3 centimetre lengths with L, and the scale quantity of the fish scale weldering within the scope of 3 centimetre lengths is 11 ~13, weld width, that is, scale width is 8~10 millimeters.

Step 5: vehicle frame heat treatment,

Vehicle frame is hung on T4 frame, is managed into T4 furnace treatment, heat treatment temperature is divided into three and heats the stage, specific as schemed 21；

It need to be 7% using quenching treatment, quenching liquid concentration, vehicle frame impregnates in quenching liquid after vehicle frame carries out T4 heat treatment Time is 10 minutes.

Whole vehicle center calibration is carried out by correcting vehicle frame platform；Iron centre bore pair after equipment carries out is adjusted by rear iron centre bore Eye adjustment；The adjustment of wheel gap is carried out by fish tail block jig；

It is managed into T6 furnace treatment, heat treatment temperature is ascending curve such as Figure 22:

The flat processing of left and right ends milling of big shaft coupling 5, by the two millimeter removals reserved in materials of big shaft coupling 5, left and right The every side in both sides removes 1 millimeter, bump injury of the big shaft coupling 5 in welding and cleaning process is removed, turnery processing goes out new End face is in case the assembling of axis external member uses；With same reason, by first 1 outside endface of pipe top and each Milling Process in bottom 1 millimeter of removal, while carrying out first bore turning, can headed by assembling for pipe bowl group more stable assembling plane is provided；Pass through strand Hole machine reams to standpipe 4, is advised and is examined by column after fraising, not met vehicle frame as defined in internal diameter and persistently carry out fraising work Industry.

Above-described R mouthfuls in industry to tubing when tubing combines because mutually passing through due to the general designation of cropped area.

Cleaning after the materials and parts preparatory stage and first three welded corner joint and after Vee formation welding includes the following steps: 1. → 3. washing → 4. of degreasing → 2. washing neutralizes → 6. washing of → 5. washing；

1. degreasing: dilution piece aqueous slkali, concentration: 50%, solution temperature: 60 DEG C, soaking time: 2 minutes, water: 2/3 Slot prevents material to be put into rear liquid spill can flood material for standard；By after welding tubing or weldment in degreasing Lifting control is transferred to next rinse bath after water 10 seconds after impregnating in solvent；

2. washing: 100% tap water, temperature: room temperature, the time: 1 minute, water: tankful；When washing, pacify in bottom of gullet Tracheae is filled, trench bottom gas tube orifice designs upward, and pipe is supplied high pressure gas and supplied in slot bottom, realize that liquid rolls upwards, Sufficiently tubing or the medicament and impurity of weldment inside and outside are rinsed, while persistently being supplied water into sink, the water in sink is held Continuous overflow, the purpose for continuing overflow are to try to reduce piece alkali concentration in water, and the purpose that convection current is rinsed is by the water flow inside water pipe Rolling, can be inside the flushing material of amplitude peak；

3. washing: 100% tap water, temperature: room temperature, the time: 1 minute, water: tankful；Overflow and convection current when washing, two Secondary cleaning can clean to greatest extent tubing or weldment inside and outside piece alkali medicament；

4. neutralizing: 5% nitric acid solvent, temperature: room temperature, the time: 2 minutes, water: 2/3 slot, with can be by tubing or welding Part floods for standard while preventing liquid spill；Inside continues convection current when immersion；In and trench bottom installs tracheae, neutralization chamber bottom Portion's gas tube orifice designs upward, and pipe is supplied high pressure gas and supplied in slot bottom, realizes that nitric acid liquid rolls upwards, sufficiently will pipe Material or weldment inside and outside and nitric acid medicament contact are rinsed, to realize abundant neutralization.

5. washing: 100% tap water, temperature: room temperature, the time: 1 minute, water: tankful；When washing, pacify in bottom of gullet Tracheae is filled, trench bottom gas tube orifice designs upward, and pipe is supplied high pressure gas and supplied in slot bottom, realize that liquid rolls upwards, Sufficiently tubing or the medicament and impurity of weldment inside and outside are rinsed, while persistently being supplied water into sink, the water in sink is held Continuous overflow, the purpose for continuing overflow are to try to reduce concentration of nitric acid in water, and the purpose that convection current is rinsed is by the water flow inside water pipe Rolling, can be inside the flushing tubing or weldment of amplitude peak；

6. washing: 100% tap water, temperature: 60 DEG C or more, the time: ± 0.5 minute 2 minutes, water: tankful；Herein Secondary cleaning can clean to greatest extent tubing or weldment inside and outside nitric acid medicament, while water temperature is promoted to 60 degree, pipe Tube surfaces fast liquid evaporation can be achieved after cleaning in material, prevents tube surfaces watermark from occurring.

The saponification and flushing that the standpipe 4 is passed through before taking out pipe specifically comprise the following steps: 1. degreasings → 2. washings → 3. washings → 4. neutralize in → 6. washing → 7. temperings → 8. degreasings of → 5. washing → → 10. washing → 11. of 9. washing With → 17. saponification → 18. concave heads processing of → 13. → 14. epitheliums of washing of → 12. washing → → 16. washing of 15. washing；

1. degreasing: dilution piece aqueous slkali, concentration: 50%, solution temperature: 50~70 DEG C, soaking time: 2 minutes, water: 2/3 slot, can flood material, for standard, anti-limited step aqueous slkali is excessive simultaneously；

2. washing: 100% tap water, temperature: room temperature, soaking time: 1 minute, water: tankful, when washing, at sink bottom Tracheae is installed in portion, and trench bottom gas tube orifice designs upward, and pipe is supplied high pressure gas and supplied in slot bottom, realizes liquid to turning over Tubing or the medicament and impurity of weldment inside and outside are sufficiently rinsed, while persistently supplied water into sink by rolling, the water in sink Continue overflow, the purpose for continuing overflow is to try to reduce piece alkali concentration in water, and the purpose that convection current is rinsed is by the water inside water pipe Stream rolling, can be inside the flushing material of amplitude peak；

3. washing: 100% tap water, temperature: room temperature, soaking time: ± 0.5 minute 1 minute, water: tankful；When washing Overflow and convection current, secondary cleaning can clean to greatest extent tubing or weldment inside and outside piece alkali medicament；

4. neutralizing: 5% concentration of nitric acid solvent of configuration, temperature: room temperature, soaking time: 2 minutes, water: 2/3 slot, can incite somebody to action Tubing or weldment flood for standard while preventing liquid spill；Inside continues convection current when immersion；In and trench bottom and top Tracheae is installed in portion, is neutralized trench bottom gas tube orifice and is designed upward, and pipe is supplied high pressure gas and supplied in slot bottom, realizes nitric acid liquid Body rolls upwards, sufficiently rinses tubing or weldment inside and outside and nitric acid medicament contact, to realize abundant neutralization；

5. washing: 100% tap water, temperature: room temperature, soaking time: 1 minute minute, water: tankful；When washing, in water Trench bottom installs tracheae, and trench bottom gas tube orifice designs upward, and pipe is supplied high pressure gas and supplied in slot bottom, realize liquid to Tubing or the medicament and impurity of weldment inside and outside are sufficiently rinsed, while persistently supplied water into sink by upper rolling, in sink Water continue overflow, continue overflow purpose be to try to reduce water in concentration of nitric acid, convection current rinse purpose be will be inside water pipe Water flow rolling, can be inside the flushing tubing or weldment of amplitude peak；

6. washing: 100% tap water, temperature: 60 DEG C or more, soaking time: 2 minutes, water: tankful；Herein secondary Cleaning can clean to greatest extent tubing or weldment inside and outside nitric acid medicament, while water temperature is promoted to 60 degree, and tubing is clear Tube surfaces fast liquid evaporation can be achieved after washing, prevent tube surfaces watermark from occurring.

7. tempering: 6061 material tempering hardness of aluminium alloy is between 0~2 degree, 7005 material tempering hardness of aluminium alloy Between 5~8 degree, between 5~9 degree, tempering mode is added 6066 material tempering hardness of aluminium alloy with common aluminum alloy tempering furnace Heat treatment, this technology is general in alloy product manufacture field, does not do emphasis herein and repeats；

8. degreasing: dilution piece aqueous slkali, concentration: 50%, solution temperature: 50~70 DEG C, soaking time: 2 minutes, water: 2/3 slot, can flood material, for standard, anti-limited step aqueous slkali is excessive simultaneously；This step is in drawing process and will to transport Cheng Zhong, the oil stain removing being bonded in outside tubing or weldment are prepared for the machining of next step；

9. washing: 100% tap water, temperature: room temperature, soaking time: 1 minute, water: tankful, when washing, at sink bottom Tracheae is installed in portion, and bottom of gullet gas tube orifice designs upward, and pipe is supplied high pressure gas and supplied in slot bottom, realizes that liquid is upward Tubing or the medicament and impurity of weldment inside and outside are sufficiently rinsed, while persistently supplied water into sink by rolling, in sink Water continues overflow, and the purpose for continuing overflow is to try to reduce piece alkali concentration in water, and the purpose that convection current is rinsed is will be inside water pipe Water flow rolling, can be inside the flushing material of amplitude peak；

10. washing: 100% tap water, temperature: room temperature, soaking time: ± 0.5 minute 1 minute, water: tankful；It is secondary clear Washing can clean to greatest extent tubing or weldment inside and outside piece alkali medicament；

It neutralizes: 5% concentration of nitric acid solvent of configuration, temperature: room temperature, soaking time: 2 minutes, water: 2/3 slot, with can Tubing or weldment are flooded for standard while preventing liquid spill；Inside continues convection current when immersion；In and trench bottom and Tracheae is installed at top, is neutralized trench bottom gas tube orifice and is designed upward, and pipe is supplied high pressure gas and supplied in slot bottom, realizes nitric acid Liquid rolls upwards, sufficiently rinses tubing or weldment inside and outside and nitric acid medicament contact, sufficiently neutralizes effect to realize Fruit；

Washing: 100% tap water, temperature: room temperature, soaking time: 1 minute minute, water: tankful；When washing, in water Trench bottom installs tracheae, and trench bottom gas tube orifice designs upward, and pipe is supplied high pressure gas and supplied in slot bottom, realize liquid to Tubing or the medicament and impurity of weldment inside and outside are sufficiently rinsed, while persistently supplied water into sink by upper rolling, in sink Water continue overflow, continue overflow purpose be to try to reduce water in concentration of nitric acid, convection current rinse purpose be will be inside water pipe Water flow rolling, can be inside the flushing tubing or weldment of amplitude peak；

Washing: 100% tap water, temperature: 60 DEG C or more, soaking time: 2 minutes, water: tankful；Herein secondary Cleaning can clean to greatest extent tubing or weldment inside and outside nitric acid medicament, while water temperature is promoted to 60 degree, and tubing is clear Tube surfaces fast liquid evaporation can be achieved after washing, prevent tube surfaces watermark from occurring；

Epithelium: epithelium concentration: 10%, temperature: 80 DEG C or more, soaking time: 2 minutes, 3/4 slot, material can be flooded It is not standard；Epithelium processing the reason of, because aluminium alloy blank is in die cast, surface has release agent etc. and covers object, need through Vibration or blasting treatment can just be handled surface and oil contaminant, if greasy dirt can not penetrate into, road alloy surface meeting after carrying out epithelium processing It is very clean, meanwhile, treated that aluminium alloy has the function of preventing oxidized aluminum alloy for epithelium；

Washing: 100% tap water, temperature: room temperature, soaking time: 2 minutes, water: tankful, when washing, at sink bottom Tracheae is installed in portion, and bottom of gullet gas tube orifice designs upward, and pipe is supplied high pressure gas and supplied in slot bottom, realizes that liquid is upward Tubing or the medicament and impurity of weldment inside and outside are sufficiently rinsed, while persistently supplied water into sink by rolling, in sink Water continues overflow, and the purpose for continuing overflow is to try to reduce piece alkali concentration in water, and the purpose that convection current is rinsed is will be inside water pipe Water flow rolling, can be inside the flushing material of amplitude peak；

Washing: 100% tap water, temperature: room temperature, soaking time: 2 minutes, water: tankful, when washing, at sink bottom Tracheae is installed in portion, realizes convection current；It persistently supplies water into sink simultaneously, the water in sink continues overflow, and secondary cleaning can be by tubing Or weldment inside and outside epithelium medicament cleans to greatest extent；

Saponification: pH value: 10, temperature: 85 DEG C, the time: 2 minutes, water: 2/3 slot, material can be flooded for standard；

Concave head: 45~80 degree of concave head angular range, length about 5MM is handled using common concave head processor.

After the above process, the standpipe 4 carries out taking out pipe operation, and common tube drawing machine tool can be used in pumping pipe described herein It carries out taking out pipe processing.

It is quasi- for the coating seat of next step after temporary vehicle frame, it can be achieved that the storage of vehicle frame is handled after the completion of all of above process It is standby.

Claims (9)

1. a kind of cycle frame comprising top tube and down tube, top tube and down tube are connected to one, upper tube in right end by first pipe One is connected in left end by standpipe with down tube；Upper bracket and lower bracket, upper bracket and lower bracket are welded on the left of standpipe Connected by the right end that rear iron is soldered to one, the left end of down tube and the lower end of standpipe and lower bracket by big shaft coupling in left end It is connected to one, upper bracket and lower bracket iron after one group that left end is arranged by front and back is connected to one；Its feature exists In: the described first pipe and upper tube and down tube junction respectively correspond the lumen of upper tube and the lumen of down tube is provided with first pipe and disappears water Hole；The upper tube and standpipe junction is provided with upper tube standpipe end and disappears water hole；It is provided under big axis on the big shaft coupling The pipe water hole that disappears is connected to down tube, and the standpipe water hole that disappears is provided on big shaft coupling and is connected to standpipe, lower branch is provided on big shaft coupling Frame, which disappears, to be connected to inside water hole and lower bracket；

The distance F of the upper tube and first pipe binding end, upper tube top distance first tube top end face is 8~9 millimeters；The down tube Distance E with first pipe binding end, down tube bottom end distance first tube bottom end face is 9~11 millimeters；The first pipe disappear water hole be two, Corresponding top tube and down tube are centrally located respectively, first pipe disappear water hole Edge Distance upper tube or lower bore must not lower than 5 millimeters, It is the bigger the better under this constraint；

The top tube and down tube junction, after top tube and down tube are welded, between upper bottom of the tube and down tube top, under upper tube Fang Caiyong upper tube extends weldering, and the length N that upper tube extends weldering is 10~15 millimeters；

When the upper tube and standpipe combine, distance H≤standpipe diameter of the upper tube top apart from riser top ends；

When vehicle frame is sized as standpipe less than 16 inches, top tube and down tube and first pipe junction can have upper tube and down tube Interference, coats down tube into inside upper tube in such a way that upper tube cuts R mouthfuls for the generation for avoiding problem above, is carrying out down tube It when in conjunction with first pipe, is corresponded on first pipe and carries out prewelding below the water hole that disappears of upper tube, down tube prewelding road length is 25 millimeters；

When the standpipe and big shaft coupling combine, standpipe and big shaft coupling carry out prewelding, before standpipe is arranged in prewelding position Side, big axis down tube disappear the top in water hole, and the length of standpipe and the pre- solder joint of big shaft coupling is K >=15 millimeter；

In top tube and down tube and first pipe end binding site, down tube and first pipe junction use preceding benefit reinforced welding mode；Described Preceding benefit reinforced welding mode specific structure are as follows: down tube and first pipe junction, down tube bottom end use fish scale weld mode weld length for 15-17 millimeters of welding bead for the first time after welding, welding bead will be covered for the first time by 1/2 welding bead of secondary welding bead pressure down pipe side, first 1/2 welding bead of secondary welding bead leakage, welding bead starting point and ending point are all capped for the first time；

When the standpipe is in conjunction with big shaft coupling, standpipe and big shaft coupling need on front side of big shaft coupling prewelding, prewelding length K >= 15 millimeters.

2. cycle frame according to claim 1, it is characterised in that: welded between two parties in the rear side of standpipe and be provided with pull-up Preceding change conduit or the rear side in big shaft coupling become conduit before welding drop-down at the center of lower bracket or so branch.

3. cycle frame according to claim 1, it is characterised in that: the rear iron end welding of the upper bracket is provided with Become conduit after on one or becomes conduit after the welding of the rear iron end of lower bracket is provided under one；After upper on upper bracket Become distance I of the conduit at rear ornamental work of iron drum center as within the scope of 95~105 millimeters；Become after lower on lower bracket conduit away from Distance J is within the scope of 95~105 millimeters at rear ornamental work of iron drum center.

4. cycle frame according to claim 1, it is characterised in that: the rear iron is divided into two kinds, and one kind is forging Iron after formula moulding, one kind are iron after blanking type；Iron is provided on the section towards upper bracket and lower bracket after forging formula cuts Face disappears water hole；When iron and upper bracket and lower bracket welding cooperate after blanking type, iron must select iron after short pin, institute after blanking type The insertion end L of iron is 5~8 millimeters after the short pin stated；When upper bracket and lower bracket are in conjunction with iron after blanking type, upper bracket And iron end drills through side respectively on medial surface and disappears water hole after lower bracket, the side disappear water hole centre distance upper bracket or Iron end margin distance M is in 10-12 millimeters of ranges after person's lower bracket.

5. cycle frame according to claim 1, it is characterised in that: the upper tube and down tube is in conjunction with first pipe End is provided with friction notch, and the friction notch is obliquely installed towards tubing side, the depth of the notch that rubs be upper tube or The half of the pipe thickness of down tube.

6. cycle frame according to claim 1, it is characterised in that: design has outer tube insertion on the preceding change conduit There is a fan-shaped surface in hole in the design of cable wire leading-out terminal, and one end diameter in the fan-shaped surface towards outer tube insertion hole is smaller, direction One end diameter of front derailleur becomes larger.

7. cycle frame according to claim 1, it is characterised in that: cycle frame as described above, production side Method are as follows:

Step 1: materials and parts are prepared,

Upper tube: full inspection, two R mouthfuls of end mills, first pipe end lower section is secondary to rush R mouthfuls, and edging cleans；

Down tube: full inspection, two R mouthfuls of end mills bore nut bore and riveting nut, R mouthfuls of the secondary milling in standpipe end, edging, cleaning；

Standpipe: tubing is cut, and is saponified and is cleaned, and pipe, R mouthfuls of standpipe big shaft coupling end mill are taken out, and preceding change conduit hard solder bores nut bore simultaneously Riveting nut, cleaning；

Head pipe: materials when materials, increase by two millimeters on the basis of practical first length of tube and cut, turning, and punching disappears water hole, cleaning；

Big shaft coupling: materials when materials, increase by two millimeters on the basis of practical first length of tube and cut；The water hole that disappears is bored in turning, Cycle serial number is rolled, cleaning:

Upper rear support: full inspection, rear iron end are flattened or are cut tiltedly, and the water hole that disappears, cleaning are bored；

Rami posterior inferior frame: full inspection, rear iron end are flattened or are cut tiltedly, and the water hole that disappears, cleaning are bored；

Top connection: full inspection, cleaning；

Lower contact: full inspection, cleaning；

Step 2: Vee formation combines,

By upper rear support and rami posterior inferior frame in conjunction with rear iron, Vee formation combination prewelding, top connection is welded entirely, and lower contact is welded entirely, after Triangle correction, rear to become conduit welding, then R mouthfuls of lower bracket big shaft coupling end mill, R mouthfuls of upper bracket big shaft coupling end mill removes defeathering Side is cleaned, and cleaning described in this step is identical with the cleaning way that materials and parts prepare step；

, need to be in closed welding region using argon protection welding mode when carrying out Vee formation combination, welding machine electricity when welding The selection of stream is selected according to actual (real) thickness, table specific as follows；Use welding rod for 4043 models, 2.4 millimeters of diameter, tungsten bar is chosen 2.4 millimeters of tungsten bars of diameter, it is ensured that welding wire surface is clean；The distance between tip and weldment are maintained at 1.5 millimeters of ranges when welding It is interior, when disposably welding is unable to complete at binding site, arc welding can not be played in same arcing point

Step 3: front triangle combines,

Standpipe and big shaft coupling prewelding, the down tube that welding position is located at big shaft coupling disappear above water hole, the milli of weld length K >=15 Rice；

Upper tube and the welding of standpipe complete cycle, distance H≤standpipe diameter of the upper tube top apart from riser top ends, the standpipe diameter are 31.8 millimeters or 34.9 millimeters；Big shaft coupling and down tube complete cycle are welded；Front triangle first time central campus is carried out after welding It is quasi-；

Down tube and first pipe prewelding sizing, down tube upper end prewelding length are 25 millimeters；Upper tube and the welding of first pipe complete cycle, when welding, on Pipe and the distance F in first pipe binding end top edge distance first tube top portion are 8-9 millimeters, and down tube and first pipe complete cycle are welded, down tube bottom end The distance E of distance first tube bottom end face is 9~11 millimeters；

Using extending welding bead in the angle of upper tube and down tube junction, when the described extension pass weld, first commonly to weld Mode is connected using 4043 welding electrodes and realizes fish scale weldering in down tube bonding gap, 4047 welding rods then used instead, in the secondary punching of upper tube R mouthfuls of edges are welded to standpipe direction, and welding bead starting point overlaps former 1/2 welding bead when welding, and welding bead length is 10~15 millimeters, have been welded Bi Hou does not use welding wire, and only welding gun swings arc on the extension welding bead for extending welding using 4047, will extend welding bead and wipes out；

In down tube and first pipe junction, down tube lower end uses preceding benefit reinforced welding mode；The preceding benefit reinforced welding mode has Body structure are as follows: down tube and first pipe junction, down tube bottom end use fish scale to weld mode weld length as 15-17 millimeters of weldering for the first time Road after welding, welding bead will be covered for the first time by 1/2 welding bead of secondary welding bead pressure down pipe side, and welding bead leakage for the first time 1/2 is first Secondary welding bead starting point and ending point are capped；

Second of center calibration of front triangle is carried out after welding；

Step 4: vehicle frame total binding,

In standpipe and upper bracket junction prewelding, big shaft coupling and lower bracket joint prewelding after prewelding, carry out Vee formation Center calibration；Standpipe welds entirely with upper bracket, and big shaft coupling welds entirely with lower bracket joint；Welding bead full inspection；

Step 5: vehicle frame heat treatment,

Vehicle frame is hung on T4 frame, is managed into T4 furnace treatment, heat treatment temperature ascending curve such as Figure 21；

Whole vehicle center calibration；Iron centre bore adjusts eye afterwards；Take turns gap adjustment；

It is managed into T6 furnace treatment, heat treatment temperature is ascending curve such as Figure 22:

The big flat processing of shaft coupling end left and right ends milling；First pipe bore hole end face milling；Standpipe fraising and column rule are examined.

8. a kind of production method of cycle frame according to claim 7, it is characterised in that:

The cleaning of the materials and parts preparatory stage includes the following steps: that → 3. washing → 4. of 1. degreasings → 2. washing neutralizes → 5. water Wash → 6. washings；

1. degreasing: piece alkali concentration: 45%~60%, solution temperature: 50~70 DEG C, soaking time: ± 0.5 minute 2 minutes, water Amount: 2/3 slot, material can be flooded for standard；

2. washing: 100% tap water, temperature: room temperature, the time: ± 0.5 minute 1 minute, water: tankful；Overflow and right when washing Stream；

3. washing: 100% tap water, temperature: room temperature, the time: ± 0.5 minute 1 minute, water: tankful；Overflow and right when washing Stream；

4. neutralize: 5% nitric acid, temperature: room temperature, the time: ± 0.5 minute 2 minutes, water: 2/3 slot, with material can be flooded for Standard；Convection current when immersion；

5. washing: 100% tap water, temperature: room temperature, the time: ± 0.5 minute 1 minute, water: tankful；Overflow and right when washing Stream；

6. washing: 100% tap water, temperature: 60 DEG C or more, the time: ± 0.5 minute 2 minutes, water: tankful, with can be by material It floods for standard, overflow and convection current when washing.

9. a kind of production method of cycle frame according to claim 7, it is characterised in that: the standpipe is being taken out Guan Qianxu through process saponification and cleaning specifically comprise the following steps: → 3. washing → 4. of 1. degreasings → 2. washing neutralize → 5. → 6. washing → 7. temperings → 8. degreasings of washing → → 10. washing → 11. of 9. washing neutralizes → 12. → 13. water of washing Wash → 17. saponification → 18. concave heads processing of → 14. epitheliums → → 16. washing of 15. washing；

1. degreasing: piece alkali concentration: 45%~60%, solution temperature: 50~70 DEG C, soaking time: ± 0.5 minute 2 minutes, water Amount: 2/3 slot, material can be flooded for standard；

2. washing: 100% tap water, temperature: room temperature, soaking time: ± 0.5 minute 1 minute, water: tankful, with can be by material It floods for standard；Overflow and convection current when washing；

3. washing: 100% tap water, temperature: room temperature, soaking time: ± 0.5 minute 1 minute, water: tankful, with can be by material It floods for standard；Overflow and convection current when washing；

4. neutralizing: 5% nitric acid, temperature: room temperature, soaking time: ± 0.5 minute 2 minutes, water: 2/3 slot, material can be flooded It is not standard, convection current when immersion；

5. washing: 100% tap water, temperature: room temperature, soaking time: ± 0.5 minute 1 minute, water: tankful, with can be by material It floods for standard；Overflow and convection current when washing；

6. washing: 100% tap water, temperature: 60 DEG C or more, soaking time: ± 0.5 minute 2 minutes, water: tankful, can incite somebody to action Material floods for standard；

7. tempering: 6061 material tempering hardnesses are between 0~2 degree, and 7005 material tempering hardnesses are between 5~8 degree, 6066 Material tempering hardness is between 5~9 degree；

8. degreasing: piece alkali concentration: 45%~60%, solution temperature: 50~70 DEG C, soaking time: ± 0.5 minute 2 minutes, water Amount: 2/3 slot, material can be flooded for standard；

9. washing: 100% tap water, temperature: room temperature, soaking time: ± 0.5 minute 1 minute, water: tankful, with can be by material It floods for standard；Overflow and convection current when washing；

10. washing: 100% tap water, temperature: room temperature, soaking time: ± 0.5 minute 1 minute, water: tankful, with can be by material It floods for standard；Overflow and convection current when washing；

It neutralizes: 5% nitric acid, temperature: room temperature, soaking time: ± 0.5 minute 2 minutes, water: 2/3 slot, material can be flooded It is not standard；Overflow and convection current when washing；

Washing: 100% tap water, temperature: room temperature, soaking time: ± 0.5 minute 1 minute, water: tankful, with can be by material It floods for standard；Overflow and convection current when washing；

Washing: 100% tap water, temperature: 60 DEG C or more, soaking time: ± 0.5 minute 2 minutes, water: tankful, can incite somebody to action Material floods for standard；Overflow and convection current when washing；

Epithelium: the full acidity of epithelium: 25~50 points, temperature: 80 DEG C or more, soaking time: ± 0.5 minute 2 minutes, 3/4 slot, with Material can be flooded for standard；

Washing: 100% tap water, temperature: room temperature, soaking time: ± 0.5 minute 2 minutes, water: tankful, with can be by material It floods for standard；Overflow and convection current when washing；

Washing: 100% tap water, temperature: room temperature, soaking time: ± 0.5 minute 2 minutes, water: tankful, with can be by material It floods for standard；Overflow and convection current when washing；

Saponification: pH value: 8~11, temperature: 85 ± 5 DEG C, the time: ± 0.5 minute 2 minutes, water: 2/3 slot, with can be by material It floods for standard；

Concave head: 45~80 degree of concave head angular range, length about 5MM.