CN104815955A - Making method of integrally formed bicycle frame - Google Patents
Making method of integrally formed bicycle frame Download PDFInfo
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- CN104815955A CN104815955A CN201510141900.2A CN201510141900A CN104815955A CN 104815955 A CN104815955 A CN 104815955A CN 201510141900 A CN201510141900 A CN 201510141900A CN 104815955 A CN104815955 A CN 104815955A
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- Prior art keywords
- wax part
- wax
- shell
- frame
- vehicle frame
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
Abstract
The invention provides a making method of an integrally formed bicycle frame. The method comprises the following steps: making a frame wax member and a process wax member, welding the frame wax member and the process wax member to form an integral module wax member, making a shell, dewaxing, baking, carrying out casting formation, and carrying out cleaning and polishing to obtain the integrally formed bicycle frame. The frame is divided into a plurality of assemblies, so the making process of the frame wax member is simplified, and the method can be widely used in integral formation of various bicycle frames without restriction by the structure, the dimension, the weight and the chemical components of the frame; no welded joints exist among all parts of the whole frame, so the whole frame has beautiful and simple profile, and the fatigue rupture resistance is improved; and the integral forming method is adopted, so the production efficiency is effectively improved.
Description
Technical field
The present invention relates to bicycle and manufacture field, be specifically related to a kind of manufacture method of monolithic molding cycle frame.
Background technology
Bicycle is a kind of green traffic instrument, is also a kind of sport and body-building apparatus, and its demand is at home and abroad huge.Cycle frame is, by welding method, frame tube and coupling pipe elements are welded together formation unitized frame in the prior art.This process makes vehicle frame itself create many welding points.Welding point not only affects the overall appearance degree of bicycle, and organizing of the heat affected area of welding point is very uneven, become the failure source of whole vehicle frame, antifatigue damage capability reduces, these welding points meeting premature degradation in follow-up quality test and use, service life reduces, and brings potential safety hazard to bicyclist.
For solving the problems of the technologies described above, people explore, utility model patent CN201020101149.6 discloses and adopts pressure casting method to carry out the integrally formed thought of cycle frame, whole vehicle frame is divided into front-axle beam component and back rest component two parts, every channel floor casting forming, and then two parts are fitted together, the method is only applicable to folding bicycle, the shaping of unitized frame can't be used for, and the method requires that front-axle beam and the back rest are " work " font cross section, attractive in appearance not, market acceptance is low.
Patent of invention CN201310519910.6 adopts liquid forging method to manufacture the thought of unitized frame, solubility core material is used to make the vehicle frame core consistent with vehicle frame inner chamber, liquid vehicle frame aluminium alloy is utilized to be full of the vehicle frame die cavity laying vehicle frame core under pressure, and under high pressure cooled and solidified is shaped, be rolled in inner vehicle frame core to dissolve in water, form hollow unitized frame.This method equipment investment is large, and solvable core easily destroys and causes waste product in liquid forging process, and is made of metal because of its molding die, has higher requirement, otherwise easily occur cracking to the thermal crack resistant ability of frame materials.
Invention CN88212126.X proposes no-welding-seam and does not wait wall Bicycle Joints to adopt sheet metal to make through punching press, drawing, anti-hole and the technique such as thinning.By being responsible for and no-welding-seam that arm the forms wall Bicycle Joints such as not, it is characterized in that equal no-welding-seam on the supervisor of this joint and the tube wall of arm, the tube wall of its arm is by with to be responsible for the mouth of pipe be connected thinning gradually to another mouth of pipe place, and it is one overall that two pipes intersect.Traditional welding point has been transferred to beyond joint by each frame tube intersection by this no-welding-seam Bicycle Joints, adopts the method for grafting to connect as one between frame tube and pipe joint.Although transferred to outside stress concentrated position by welding point, improve security, do not accomplish unitized frame.
The method in some fields application hot investment casting (also claiming model casting) is to realize the monolithic molding of thin-wall part now, hot investment casting is the method making casting forming with meltable (molten) property mould and fire-resistant dispensable mould (core), but this method can monolithic molding small complex thin-wall part, when being used for preparing large part, die mould is huge, the easily distortion of meltable (molten) property mould and fire-resistant dispensable mould (core), cracking.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of manufacture method of monolithic molding cycle frame, can solve the problem that vehicle body aesthetics is poor, security is low and percent defective is high.
For solving the problems of the technologies described above, technical scheme provided by the invention is: a kind of manufacture method of monolithic molding cycle frame, is characterized in that comprising the following steps:
(1) making of the module wax part of unitized frame
Module wax part comprises cured of vehicle frame, technique wax part, wherein cured of vehicle frame comprises front triangle wax part and Vee formation wax part, first front triangle wax part is made, assembly welding Vee formation wax part, then manufacture craft wax part, is finally undertaken welding by front triangle wax part, Vee formation wax part, technique wax part and obtains a complete module wax part;
(2) shell processed, dewaxing, baking
Carry out dip-coating material and stucco process to module wax part: by module wax part dip-coating material and stucco, after progressively forming shell, ventilate successively dry sclerosis 1-2h at 10-30 DEG C, until shell thickness reaches 5-8mm;
Carry out heating dewaxing treatment to module wax part: the module wax part steam insulation 5-15min under the vapour pressure of 0.1-0.5Mpa with shell is dewaxed, obtain with vehicle frame chamber, running gate system chamber, emit the shell in oral cavity and hook tabs connecting rod chamber;
Roasting and precooling treatment are carried out to shell: shell is formed firm shell mould after roasting 1-2 hour at 800-950 DEG C, and then is cooled to 500-600 DEG C.
(3) castable
Place stable by the shell after roasting strengthening, temperature, upper, be that the liquid metal of the above 80-120 of liquidus temperature DEG C pours into, treat that molten metal is full of whole shell, shell after cooled and solidified, obtain monolithic molding cycle frame by cup.
Wherein, in step (1), described front triangle wax part is pipe wax part before the multistage be shaped by pressure injection, upper pipe wax part, lower pipe wax part, standpipe wax part, five-way joint wax part, saddle joint wax part assembly welding form or formed along point tangent plane assembly weldings by two half front triangle wax parts that centrally line longitudinally separates, pressure injection is shaped respectively;
Described Vee formation wax part stands breeches pipe wax part, saddle joint wax part, five-way joint wax part, left and right chain stay hook tabs joint wax part and left and right by the left and right chainstay wax part of multistage pressure injection be shaped, left and right to found fork hook strip terminal wax part assembly welding and form;
Cup wax part, main sprue wax part, Vee formation sprue wax part, front triangle sprue wax part, cross gate wax part, front pipe ingate wax part, upper pipe ingate wax part, lower pipe ingate wax part, standpipe ingate wax part, left and right flat ingate fork wax part, left and right vertical fork ingate wax part, left and right hook tabs connecting rod wax part, rising head wax part assembly welding form by described technique wax part assembly.
Wherein, in step (1), described vehicle frame wax part assembly by mould material pressure injection shaping outline, and forms inner chamber by die mould or core.
Wherein, in step (1), at described module wax part, described front triangle sprue wax part is vertically installed in described front triangle wax part institute planar, and described Vee formation sprue wax part is vertically installed in described Vee formation wax part institute planar; Described front triangle sprue wax part is connected with described front triangle wax part by described front triangle ingate wax part, described Vee formation sprue wax part is connected with described Vee formation wax part by described Vee formation ingate wax part, described cross gate wax part is welded in the upper end of described front triangle sprue wax part and described Vee formation sprue wax part, and described main sprue wax part vertical welding is in the central authorities of described cross gate wax part.
Wherein, in step (1), when making vehicle frame wax part and technique wax part, mould material is heated to 40-90 DEG C, utilizes the pressure of 1-20MPa to be pressed in the die mould that preheat temperature is 20-40 DEG C, take out after pressurize 0.2-4min solidifies and obtain wax part.
Further, in step (1), when making vehicle frame wax part and technique wax part, mould material used is resin basic mode material, and its fusing point is 50-95 DEG C, linear shrinkage ratio 0.4-1.0%.
Wherein, in step (1), described front triangle wax part outside dimension is the outside dimension of front triangular frame and the metal contracts amount sum of described front triangular frame, the outside dimension of described Vee formation wax part is the outside dimension of Vee formation vehicle frame and the vehicle frame metal contracts amount sum of described Vee formation, guarantees the monolithic molding fame dimensions composite demand obtained like this.
Wherein, in step (2), when preparing the shell of aluminium alloy bicycle frame, the surface layer refractory material adopted is bauxite or mullite, binding agent is Ludox or waterglass, and back-up coat refractory matter is fire clay, and binding agent is silester or waterglass or Ludox.
In step (2), when preparing the shell of titanium alloy vehicle frame, the surface layer refractory material of employing is zirconium English powder or schmigel, and binding agent is Ludox or waterglass, back-up coat refractory matter is fire clay, and binding agent is silester, waterglass or Ludox.
The advantage that the present invention has and good effect are:
1, due to vehicle frame is divided into several assemblies, the making of the wax part module of vehicle frame is simplified, not by the restriction of body frame structure for automotive, size, weight and chemical composition, the monolithic molding of various bicycle rack can be widely used in, solve a manufacture difficult problem for the structure wax part of complicated vehicle frame;
2, the technical scheme of one piece shaping, multiple unitized frame is made to realize monolithic molding by once-cast, eliminate the series of processes such as the tubulation of welded frame, cutting, distortion, assembling, welding, polishing, welding joint between each parts of whole vehicle frame, make whole body contour elegant in appearance, antifatigue is broken can ability be improved, and owing to have employed this integrally formed method, effectively improves production efficiency;
3, wax part mould material used is resin basic mode material, and fusing point is low, shrinks little, and the mould material obtained after the demoulding can reclaim, then is used for making new fusible pattern, and conservation, reduces holistic cost.
4, front triangle wax part and Vee formation wax part are provided with multiple ingate wax part in the plane and are communicated with vehicle frame wax part by sprue wax part, ensure that metal liquid fast and filling equably, ensure that and do not occur cold shut defects, improve quality and the service life of vehicle frame.
Accompanying drawing explanation
The structural representation of Fig. 1 vehicle frame wax of the present invention part assembly;
Fig. 2 is the structural representation of the cross section of wax part module of the present invention;
Fig. 3 is the structural representation of the longitudinal section of wax part module of the present invention;
Fig. 4 is the flow chart of the manufacture method of monolithic molding vehicle frame of the present invention;
Fig. 5 is the flow chart of the another kind of embodiment of manufacture method of monolithic molding vehicle frame of the present invention;
Fig. 6 is the schematic flow sheet of the manufacture method of module wax part in the present invention.
In figure: in figure: 101, front pipe wax part 102, upper pipe wax part 103, lower pipe wax part 104, standpipe wax part about 105 chain stay wax part 106, left and right vertical fork wax part 1051, left and right chainstay wax part 1061, the vertical breeches pipe wax part 107 in left and right, five-way joint wax part 108, saddle joint wax part 109, left and right chain stay hook tabs joint wax part 110, the vertical fork hook strip terminal wax part 111 in left and right, front triangle wax part 112, Vee formation wax part 201, cup wax part 202, main sprue wax part 203, cross gate wax part 204, front triangle sprue wax part 205, Vee formation sprue wax part 206, rising head wax part 207, left and right hook tabs connecting rod wax part 208, front triangle ingate wax part 2081, upper pipe ingate wax part 2082 times pipe ingate wax part 2083 standpipe ingate wax parts 209, Vee formation ingate wax part, about 2091 chain stay ingate wax part about 2092 vertical fork ingate wax part
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.
Embodiment 1 as shown in Figure 1, Figure 2, Figure 3 shows, a kind of manufacture method of monolithic molding cycle frame, its step comprises:
(1) making of the module wax part of unitized frame.
Module wax part comprises cured of vehicle frame, technique wax part, wherein cured of vehicle frame includes front triangle wax part 111 and Vee formation wax part 112, first make front triangle wax part 111, assembly welding Vee formation wax part 112, then manufacture craft wax part, then front triangle wax part 111, technique wax part are carried out welding obtain a complete module wax part.
Wherein, in step (1), overall described vehicle frame wax part is by can pressure injection shaping outline the vehicle frame wax part components welding forming inner chamber by swaging or core form easily with mould material.Described vehicle frame wax part is made up of front triangle wax part 111, left and right chain stay wax part 105, left and right vertical fork wax part 106, brake mount wax part (not shown) and wire seat wax part (not shown) five part.Front triangle wax part 111 comprises pipe wax part 102 in 1-5 section, pipe wax part 103 under 1-5 section, 1-5 section standpipe wax part 104, front pipe wax part 101 and five-way joint wax part 107 and saddle joint wax part 108, each section of wax part pressure injection shaping respectively, then by saddle joint wax part 108 respectively with upper pipe wax part 102 front end, standpipe wax part 104 upper end and left and right chainstay wax part 1051, upper end (openend) butt welding of the vertical breeches pipe wax part 1061 in left and right is neatly firm, front pipe wax part 101 respectively with the front end of upper pipe wax part 102, the front end butt welding of lower pipe wax part 103 is neatly firm, five-way joint wax part 107 and standpipe wax part 104 lower end, lower pipe wax part 103 rear end, left and right chainstay wax part 1051, vertical breeches pipe wax part 1061 front end (openend) butt welding in left and right is neatly firm, form front triangle wax part 111, left and right chain stay wax part 105 comprises the 1-3 section left and right chainstay wax part 1051 and 1 of pressure injection shaping respectively to left and right chain stay hook tabs joint wax part 109, each section of wax part pressure injection shaping respectively, by neatly firm for the front end butt welding of the rear end of left and right chainstay wax part 1051 and left and right chain stay hook tabs joint wax part 109 after shaping, form left and right chain stay wax part 105, about left and right vertical fork wax part 106 comprises the 1-3 section of pressure injection shaping respectively, vertical breeches pipe wax part 1061 and 1 founds fork hook strip terminal wax part 110 to left and right, the upper end butt welding of fork hook strip terminal wax part 110 is stood neatly firmly in lower end and the left and right of after shaping, left and right being found breeches pipe wax part 1061, forms left and right vertical fork wax part 106, brake mount wax part (not shown) is used for forming the brake mount on vehicle frame, is arranged on vertical fork wax part 106 upper end, described left and right, the overall pressure injection of wire seat wax part (not shown) is shaped, and is welded on described left and right and stands between the upper end of fork wax part 106.
In step (1), described Vee formation wax part 112 is welded with saddle joint wax part 108 one end vertical fork wax part 106 upper end, the left and right in described vehicle frame wax part assembly, chain stay wax part 105 front end, left and right is welded with five-way joint wax part 107 one end, again left and right chain stay hook tabs joint wax part 109 and left and right are found fork hook strip terminal wax part 110 correspondence to weld together, form the Vee formation wax part 112 be connected firmly with front triangle wax part 111.The position of corresponding vehicle frame is welded brake mount wax part and wire seat wax part, removes burr, obtain structure, wax part vehicle frame that shape is identical with size and bicycle rack.
In step (1), described technique wax part comprises formation running gate system wax part, rising head wax part 206 is connected wax part with technique, described running gate system wax part is by cup wax part 201, main sprue wax part 202, front triangle sprue wax part 204, Vee formation sprue wax part 205, cross gate wax part 203, front triangle ingate wax part 208, Vee formation ingate wax part 209, left and right hook tabs connecting rod wax part 207 assembly welding forms, wherein front triangle ingate wax part 208 comprises pipe ingate wax part 2081, lower pipe ingate wax part 2082, standpipe ingate wax part 2083, Vee formation ingate wax part 209 comprises left and right chain stay ingate fork wax part 2091, left and right vertical fork ingate wax part 2092.Described rising head wax part 206 is truncated cone-shaped, is used for forming rising head; Described technique connects wax part and comprises left and right hook tabs connecting rod wax part 207, is used for forming the molten metal passage between the hook tabs of left and right.
Mould material is heated to 40-90 DEG C, utilizes the pressure of 1-20MPa to be pressed in the swaging that preheat temperature is 20-40 DEG C, take out after pressurize 0.2-4min solidifies and obtain wax part.Steam pressure is higher, and temperature is higher, dewaxing speed faster (temperature retention time shortening), but too high, can improve in forming apparatus cost.
Further, when making vehicle frame wax part and technique wax part, mould material used is resin basic mode material, fusing point (also claiming dropping point) 50-95 DEG C, linear shrinkage ratio 0.4-1.0%, the intensity of resin basic mode material is good, lightweight, and the mould material obtained after the demoulding can reclaim, then be used for making new fusible pattern, conservation.
In step (1), the outside dimension of each vehicle frame wax part assembly is the outside dimension of vehicle frame appropriate section and corresponding amount of contraction sum.
In step (1), by vehicle frame wax part horizontal positioned, stand between fork hook strip terminal wax part 110 at the left and right chain stay hook tabs joint wax part 109 of vehicle frame wax part and left and right and weld left and right hook tabs connecting rod wax part 207, vertical placement front triangle sprue wax part 204 and Vee formation sprue wax part 205 is planar distinguished at front triangle wax part 111 and Vee formation wax part 112, front triangle sprue wax part 204 is by upper pipe ingate wax part 2081, lower pipe ingate wax part 2082 and standpipe ingate wax part 2083 respectively with upper pipe wax part 102, lower pipe wax part 103 and standpipe wax part 104 weld firmly neat, Vee formation sprue wax part 205 welds firmly neat with the vertical wax part 106 of pitching of left and right chain stay wax part 105 and left and right by left and right chain stay ingate wax part 2091 and left and right vertical fork ingate wax part 2092 respectively, left and right chain stay hook tabs joint wax part 109 above being in and left and right are stood above fork hook strip terminal wax part 110 and are welded rising head wax part 206, form one deck module.
Rewelding 5-20 layer module according to this, sprue wax part between every layer of module is connected with rising head wax part 206, at the front triangle sprue wax part 204 of the top one deck module and the upper end welding cross gate wax part 203 of Vee formation sprue wax part 205, the central vertical of cross gate wax part 203 welds main sprue wax part 202, main sprue wax part 202 upper end welding cup wax part 201, obtains a complete module wax part.Front triangle wax part 111 and Vee formation wax part 112 are provided with multiple ingate wax part in the plane and are communicated with vehicle frame wax part by sprue wax part, ensure that metal liquid fast and pour into a mould equably, ensure that and do not occur cold shut defects, improve quality and the life-span of vehicle frame.
(2) shell processed, dewaxing, baking.Adopt the 10-30 DEG C of successively dry sclerosis 1-2h that ventilates, until shell thickness reaches 5-8mm, the steam insulation 5-15min of 0.1-0.5MPa is adopted to dewax, obtain with vehicle frame chamber, running gate system chamber, emit the shell in oral cavity and hook tabs connecting rod chamber, shell forms firm shell mould after carrying out 800-950 DEG C of roasting 1-2 hour, is then cooled to 500-600 DEG C.800-950 DEG C of roasting is to obtain high strength, is cooled to cooling and setting rate that 500-600 DEG C can be improved vehicle frame molten metal, to prevent coarse grains.
Wherein, the surface layer refractory material of employing is bauxite or mullite, and binding agent is Ludox or waterglass, and back-up coat refractory matter is fire clay, and binding agent is silester, waterglass or Ludox;
(3) castable and cleaning polishing by through roasting strengthening after shell cup upper, vertical placement is stablized, be that the liquid aluminium alloy of the above 80-120 of liquidus temperature DEG C pours into from the cup of shell by temperature, through main sprue, cross gate flows into front triangle sprue and the Vee formation sprue of the bottom simultaneously, manage forward through front triangle ingate, top tube and down tube, five-way, saddle joint, rising head filling, flow into chain stay through Vee formation ingate and stand simultaneously and pitch and the connecting rod be full of between the fork of left and right and rising head, from bottom to top to the 2nd layer after ground floor is full of, 3rd layer ... filling successively, until molten metal is full of whole casting mold, shell after cooled and solidified, obtain bicycle unitized frame of the present invention.
Step (4) polishing process is also included below in step (3):
When the impurity of liquid stream front end converges in rising head upper end, obtain bicycle unitized frame of the present invention, now excise rising head and other technique clout, cleaning polishing, make it neatly smooth.
Embodiment 2 as shown in Figure 1, Figure 2, Figure 3 shows, a kind of manufacture method of monolithic molding cycle frame, its step comprises:
(1) making of the module wax part of unitized frame.
Module wax part comprises cured of vehicle frame, technique wax part, wherein cured of vehicle frame includes front triangle wax part 111 and Vee formation wax part 112, first make front triangle wax part 111, assembly welding Vee formation wax part 112, manufacture craft wax part, is then undertaken welding by front triangle wax part 111, technique wax part and obtains a complete module wax part.
Wherein, in step (1), overall described vehicle frame wax part is by can pressure injection shaping outline the vehicle frame wax part components welding forming inner chamber by die mould or core form easily with mould material.Described vehicle frame wax part is made up of front triangle wax part 111, left and right chain stay wax part 105, left and right vertical fork wax part 106, brake mount wax part and wire seat wax part (not shown) five part.Front triangle wax part 111 comprises two half front triangle wax parts 111 that centrally line longitudinally separates, difference pressure injection is shaped, whole front triangle wax part 111 is welded as along a point tangent plane after being shaped, comprise the two and half left and right chain stay wax parts 105 that centrally line longitudinally separates, difference pressure injection is shaped, after being shaped, edge divides a tangent plane to be welded as whole left and right chain stay wax part 105; Left and right vertical fork wax part 106 comprise centrally line longitudinally separately, about the two and half vertical fork wax parts 106 that are shaped of pressure injection respectively, be welded as whole left and right vertical fork wax part 106 along a point tangent plane after being shaped; Brake mount wax part is used for forming the brake mount on vehicle frame, is arranged on the requirement position that fork wax part 106 upper end is stood in described left and right; The overall pressure injection of wire seat wax part is shaped, be welded on found fork wax part 106 in described left and right upper end between requirement position.
In step (1), described Vee formation wax part 112 left and right in described vehicle frame wax part assembly is stood fork wax part 106 upper end to weld with saddle joint wax part 108 one end on front triangle wax part, chain stay wax part 105 front end, left and right is welded with five-way joint wax part 107 one end on front triangle wax part, again left and right chain stay hook tabs joint wax part 109 and left and right are found fork hook strip terminal wax part 110 correspondence to weld together, form the Vee formation wax part 112 be connected firmly with front triangle wax part 111.The position of corresponding vehicle frame is welded brake mount wax part and wire seat wax part, removes burr, obtain structure, wax part vehicle frame that shape is identical with size and bicycle rack.
In step (1), described technique wax part comprises formation running gate system wax part, rising head wax part 206 is connected wax part with technique, described running gate system wax part is by cup wax part 201, main sprue wax part 202, front triangle sprue wax part 204, Vee formation sprue wax part 205, cross gate wax part 203, front triangle ingate wax part 208, Vee formation ingate wax part 209, left and right hook tabs connecting rod wax part 207 assembly welding forms, wherein front triangle ingate wax part 208 comprises pipe ingate wax part 2081, lower pipe ingate wax part 2082, standpipe ingate wax part 2083, Vee formation ingate wax part 209 comprises left and right chain stay ingate fork wax part 2091, left and right vertical fork ingate wax part 2092.Described rising head wax part 206 is truncated cone-shaped, is used for forming rising head; Described technique connects wax part and comprises left and right hook tabs connecting rod wax part 207, is used for forming the molten metal passage between the hook tabs of left and right.
In step (1), mould material is heated to 40-90 DEG C, utilizes the pressure of 1-20MPa to be pressed in the swaging that preheat temperature is 20-40 DEG C, take out after pressurize 0.2-4min solidifies and obtain wax part.
Further, when making vehicle frame wax part and technique wax part, mould material used is resin basic mode material, fusing point (also claiming dropping point) 50-95 DEG C, linear shrinkage ratio 0.4-1.0%, the intensity of resin basic mode material is good, lightweight, and the mould material obtained after the demoulding can reclaim, then be used for making new fusible pattern, conservation.
In step (1), the outside dimension of each vehicle frame wax part assembly is the outside dimension of vehicle frame appropriate section and corresponding amount of contraction sum.
In step (1), by vehicle frame wax part horizontal positioned, stand between fork hook strip terminal wax part 110 at the left and right chain stay hook tabs joint wax part 109 of vehicle frame wax part and left and right and weld left and right hook tabs connecting rod wax part 207, difference vertical placement front triangle sprue wax part 204 and Vee formation sprue wax part 205 in front triangle with Vee formation, front triangle sprue wax part 204 is by upper pipe ingate wax part 2081, lower pipe ingate wax part 2082 and standpipe ingate wax part 2083 respectively with upper pipe wax part 102, lower pipe wax part 103 and standpipe wax part 104 weld firmly neat, Vee formation sprue wax part 205 welds firmly neat with the vertical wax part 106 of pitching of left and right chain stay wax part 105 and left and right by left and right chain stay ingate wax part 2091 and left and right vertical fork ingate wax part 2092 respectively, left and right chain stay hook tabs joint wax part 109 above being in and left and right are stood above fork hook strip terminal wax part 110 and are welded rising head wax part 206, form one deck module.
Rewelding 5-20 layer module according to this, sprue wax part between every layer of module is connected with rising head wax part 206, at the front triangle sprue wax part 204 of the top one deck module and the upper end welding cross gate wax part 203 of Vee formation sprue wax part 205, the central vertical of cross gate wax part 203 welds main sprue wax part 202, main sprue wax part 202 upper end welding cup wax part 201, obtains a complete module wax part.Front triangle wax part 111 and Vee formation wax part 112 are provided with multiple ingate wax part in the plane and are communicated with vehicle frame wax part by sprue wax part, ensure that metal liquid fast and pour into a mould equably, ensure that and do not occur cold shut defects, improve quality and the life-span of vehicle frame
(2) shell processed, dewaxing, baking.Adopt the 10-30 DEG C of successively dry sclerosis 1-2h that ventilates, until shell thickness reaches 5-8mm, the steam insulation 5-15min of 0.1-0.5MPa is adopted to dewax, obtain with vehicle frame chamber, running gate system chamber, emit the shell in oral cavity and hook tabs connecting rod chamber, shell forms firm shell mould after carrying out 800-950 DEG C of roasting 1-2 hour, then with the cooling 500-600 DEG C of 100-150 DEG C/h.800-950 DEG C of roasting is to obtain high strength, is cooled to cooling and setting rate that 500-600 DEG C can be improved vehicle frame molten metal, to prevent coarse grains.
Wherein, the surface layer refractory material of employing is zirconium English powder or schmigel, and binding agent is Ludox or waterglass, and back-up coat refractory matter is fire clay, and binding agent is silester, waterglass or Ludox.
(3) castable and cleaning polishing.By the shell cup after roasting strengthening upper, vertical placement is stablized, be that the liquid titanium alloy of the above 80-120 of liquidus temperature DEG C pours into from the cup of shell by temperature, through main sprue, cross gate flows into front triangle sprue and the Vee formation sprue of the bottom simultaneously, manage forward through front triangle ingate, top tube and down tube, five-way, saddle joint, rising head filling, flow into chain stay through Vee formation ingate and stand simultaneously and pitch and the connecting rod be full of between the fork of left and right and rising head, from bottom to top to the 2nd layer after ground floor is full of, 3rd layer ... filling successively, until molten metal is full of whole casting mold, shell after cooled and solidified, obtain bicycle unitized frame of the present invention.
(4) impurity of polishing treatment fluid stream front end converges in rising head upper end, excises rising head and other technique clout, cleaning polishing, makes it neatly smooth.
The foregoing is only embodiments of the invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within right of the present invention.
Claims (10)
1. a manufacture method for monolithic molding cycle frame, is characterized in that comprising the following steps:
(1) making of the module wax part of unitized frame
Module wax part comprises cured of vehicle frame, technique wax part, wherein cured of vehicle frame comprises front triangle wax part and Vee formation wax part, first front triangle wax part is made, assembly welding Vee formation wax part, obtain vehicle frame wax part, then manufacture craft wax part, is finally undertaken welding by front triangle wax part, Vee formation wax part, technique wax part and obtains a complete module wax part;
(2) shell processed, dewaxing, baking
Carry out dip-coating material and stucco to module wax part: by module wax part dip-coating material and stucco, after progressively forming shell, ventilate successively dry sclerosis 1-2h at 10-30 DEG C, until shell thickness reaches 5-8mm;
Module wax part is heated and dewaxing treatment: the module wax part steam insulation 5-15min under the vapour pressure of 0.1-0.5Mpa with shell is dewaxed, obtain with vehicle frame chamber, running gate system chamber, emit the shell in oral cavity and hook tabs connecting rod chamber;
Roasting and precooling treatment are carried out to shell: shell is formed firm shell mould after roasting 1-2 hour at 800-950 DEG C, is then cooled to 500-600 DEG C with the speed of 100-150 DEG C/h;
(3) castable
Place stable by the shell after roasting strengthening, temperature, upper, be that the liquid metal of the above 80-120 of liquidus temperature DEG C pours into, treat that molten metal is full of whole shell, shell after cooled and solidified, obtain monolithic molding cycle frame by cup.
2. the manufacture method of a kind of monolithic molding cycle frame according to claim 1, is characterized in that: in step (1),
Described front triangle wax part is pipe wax part before the multistage be shaped by pressure injection, upper pipe wax part, lower pipe wax part, standpipe wax part, five-way joint wax part, saddle joint wax part assembly welding form or formed along point tangent plane assembly weldings by two half front triangle wax parts that centrally line longitudinally separates, pressure injection is shaped respectively;
Described Vee formation wax part be found breeches pipe wax part by the left and right chainstay wax part of multistage pressure injection be shaped, left and right, saddle joint wax part, five-way joint wax part, left and right chain stay hook tabs joint wax part, left and right found fork hook strip terminal wax part assembly welding and form;
Described technique wax part assembly is formed cup wax part, main sprue wax part, Vee formation sprue wax part, front triangle sprue wax part, cross gate wax part, front pipe ingate wax part, upper pipe ingate wax part, lower pipe ingate wax part, standpipe ingate wax part, left and right flat ingate fork wax part, left and right vertical fork ingate wax part, left and right hook tabs connecting rod wax part, rising head wax part assembly welding.
3. the manufacture method of a kind of monolithic molding cycle frame according to claim 1, is characterized in that: in step (1), and described vehicle frame wax part assembly by mould material pressure injection shaping outline, and forms inner chamber by die mould or core.
4. the manufacture method of a kind of monolithic molding cycle frame according to claim 3, it is characterized in that: in step (1), at described module wax part, described front triangle sprue wax part is vertically installed in described front triangle wax part institute planar, and described Vee formation sprue wax part is vertically installed in described Vee formation wax part institute planar; Described front triangle sprue wax part is connected with described front triangle wax part by described front triangle ingate wax part, described Vee formation sprue wax part is connected with described Vee formation wax part by described Vee formation ingate wax part, described cross gate wax part is welded in the upper end of described front triangle sprue wax part and described Vee formation sprue wax part, and described main sprue wax part vertical welding is in the central authorities of described cross gate wax part.
5. the manufacture method of a kind of monolithic molding cycle frame according to claim 1, it is characterized in that: in step (1), when making vehicle frame wax part and technique wax part, mould material is heated to 40-90 DEG C, utilize the pressure of 1-20MPa to be pressed in the die mould that preheat temperature is 20-40 DEG C, take out after pressurize 0.2-4min cooling curing and obtain wax part.
6. the manufacture method of a kind of monolithic molding cycle frame according to claim 5, it is characterized in that: in step (1), when making vehicle frame wax part and technique wax part, mould material used is resin basic mode material, its fusing point is 50-95 DEG C, linear shrinkage ratio 0.4-1.0%.
7. the manufacture method of a kind of monolithic molding cycle frame according to claim 1, it is characterized in that: in step (1), described front triangle wax part outside dimension is the outside dimension of front triangular frame and the metal contracts amount sum of described front triangular frame, and the outside dimension of described Vee formation wax part is the outside dimension of Vee formation vehicle frame and the metal contracts amount sum of described Vee formation vehicle frame.
8. the module wax part of bicycle unitized frame according to claim 1, it is characterized in that: also include after step (3): step (4) polishing process, to the monolithic molding cycle frame obtained, excise rising head and technique clout, cleaning polishing, make it neatly smooth.
9. the manufacture method of a kind of monolithic molding cycle frame according to claim 1, it is characterized in that: in step (2), when preparing the shell of aluminium alloy bicycle frame, the surface layer refractory material adopted is bauxite or mullite, binding agent is Ludox or waterglass, back-up coat refractory matter is fire clay, and binding agent is silester or waterglass or Ludox.
10. the manufacture method of a kind of monolithic molding cycle frame according to claim 1, it is characterized in that: in step (2), when preparing the shell of titanium alloy vehicle frame, the surface layer refractory material adopted is zirconium English powder or schmigel, binding agent is Ludox or waterglass, back-up coat refractory matter is fire clay, and binding agent is silester, waterglass or Ludox.
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| CN110640084A (en) * | 2019-10-29 | 2020-01-03 | 贵州安吉航空精密铸造有限责任公司 | Preparation method of investment casting shell |
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| CN110508749A (en) * | 2019-09-18 | 2019-11-29 | 合肥工业大学 | Cycle frame and cycle frame preparation method |
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| CN110640084A (en) * | 2019-10-29 | 2020-01-03 | 贵州安吉航空精密铸造有限责任公司 | Preparation method of investment casting shell |
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