CN102152434A - Machining process and device for filling weak-rigidity spare part with paraffin - Google Patents
Machining process and device for filling weak-rigidity spare part with paraffin Download PDFInfo
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Abstract
The invention relates to a machining process and device for filling a weak-rigidity spare part with paraffin. The method comprises the following steps of: melting paraffin, hierarchically casting the paraffin, and the like, wherein the paraffin is melted in a paraffin casting device by a water bath heating device close to the bottom of the paraffin casting device; and melt paraffin is hierarchically cast through the control of a ball valve. The invention can improve the processing rigidity of the weak-rigidity spare part, improves the processing effect and has the advantages of convenience for operation, simple structure and capability of recycling.
Description
Technical field
The present invention relates to a kind of part processing, particularly paraffin is filled the processing technology and the device of weak hard parts.
Background technology
In the whole frame of aero titanium alloy, beam and large-scale integral wallboard manufacture process, because the general more complicated of design of part shape, profile is coordinated to require high, metal removal rate is big, and relative rigidity is lower, and processing technology is poor, under influence of various factors such as cutting force, cutting vibration, heat in metal cutting, cause occurring problems such as cutter relieving, distortion, vibration easily in the processing of titanium alloy thin wall spare, particularly this phenomenon of titanium alloy thin wall structural member is more obvious, and crudy is difficult to control.At present, in actual processing, be merely able to guard processing, even so, still can not deal with problems fully, finally need the pincers worker post processing of polishing by reducing technological parameter.Reduced on-the-spot working (machining) efficiency so greatly, waste great amount of manpower and material resources and and financial resources.Jia Guangjie (thin-wall case paraffin is filled the High-speed machining method. Jia Guangjie. and new technology new technology NEW TECHNOLOGY; 2009 the 03rd phases of NEWPROCESS) Yan Jiu thin-walled parts paraffin filling technique, changed the eigentone of part, but the effect of this technology remains further to be improved, and at present, China does not still have the integrated system of the paraffin fill process of the weak rigidity part of titanium alloy frame class.
Summary of the invention
The objective of the invention is provides a kind of paraffin to fill the processing technology and the device of weak hard parts at the problems referred to above, can improve workpiece rigidity better to realize the absorbing vibration damping simultaneously, satisfies stability and high efficiency cutting requirement.
The present invention is achieved through the following technical solutions:
A kind of paraffin is filled the processing technology of weak hard parts, comprises that step is as follows:
(1) takes by weighing required solid paraffin amount;
(2) heating paraffin is melted;
(3) laminated pouring;
(4) the polishing paraffin surface is to satisfy the workpiece requirement.
Described workpiece preferably is primarily aimed at the weak rigidity part of titanium alloy frame class of aviation, also is applicable to the weak category of rigid part of other materials simultaneously.
The amount of above-mentioned paraffin is the product of the total dischargeable capacity and the paraffin density of workpiece inside casing.
The heating-up temperature of described paraffin is for being controlled at 70 ℃-80 ℃, and preferred 75 ℃, can guarantee that paraffin melts fast, also can shorten the paraffin condensation time.
Described laminated pouring is preferred: at workpiece upper berth gauze paraffin once-cast workpiece, setting time is not less than 20min (preferred 20min-35min) under the room temperature, repave last layer gauze paraffin second pouring, cooled and solidified is solidified for twice and total time to be not less than 40min.
Described once-cast and second pouring, once-cast is in the mid-early stage of whole casting process, when promptly watering fluence and being the 1/2-3/4 volume of workpiece inside casing dischargeable capacity, poring rate is controlled at 0.4-0.6m/s, second pouring is in the later stage of whole casting process, when promptly watering fluence and be the back 1/4-1/2 volume of workpiece inside casing dischargeable capacity, poring rate is decelerated to 0.2-0.3m/s; First and second builds the dischargeable capacity that total amount is equal to or slightly less than the workpiece inside casing.
Technological process is preferred: raw material preparation-paraffin thawing-once-cast-second pouring-polishing-detection-clamping-completion of processing paraffin reclaims.Must be in strict accordance with specification requirement, mainly comprise paraffin combine firmly with workpiece interface can not become flexible, the paraffin packed height can not be higher than surface of the work, paraffin solidifies and total time can not be lower than 40min etc.
A kind of paraffin is filled the processing unit (plant) of weak hard parts, comprise paraffin apparatus for pouring and the water-bath heater below it, described paraffin apparatus for pouring comprises the housing that holds paraffin, case top is established the paraffin lid, the nearly bottom of lower housing portion is provided with nipple, nipple connects the outer coupling of housing, and coupling links to each other with flow export by ball valve.
Described water-bath heater comprises the water tank of sealing, is provided with heater in the water tank, establishes water cover and delivery port on the water tank.
Establish Pressure gauge and safety valve on the described water tank.
Described paraffin covers establishes rocking handle.
The invention provides a kind of processing technology and device that is applied to the weak rigidity part of aviation, can simply, effectively, practicably improve weak rigidity part processing rigidity, the vibration amplitude maximum reduces amount of decrease and is about 46%～69%, the surface roughness value amount of decrease is about 6%～25%, improve processing effect, have characteristics easy to operate, simple in structure, recyclable utilization.And the paraffin cost is lower, can effectively improve the working (machining) efficiency and the quality of workpiece, reduces the working time and the energy of machine operation workman and pincers worker, cut down finished cost, and safety, reliable.Adopt the mode of laminated pouring, can effectively reduce cool time, improve condensation effect, increase paraffin and workpiece bond strength.
Description of drawings
Fig. 1 is a paraffin fill process system schematic;
Fig. 2 is the processing unit (plant) front view that paraffin is filled weak hard parts;
Fig. 3 is the right diagrammatic sketch of processing unit (plant) that paraffin is filled weak hard parts;
Fig. 4 is that the A-A of Fig. 2 is to cutaway view;
Fig. 5 is the weak rigidity part blank of titanium alloy frame class;
Fig. 6 is the paraffin filling mode, and wherein 1,6,8 is to fill paraffin, and other are unfilled;
Time course when Fig. 7 is the vibration of 7-a-2 different processing stages process;
Time course when Fig. 8 is the vibration of 3-c-2 different processing stages process;
Fig. 9 is 3-c-2 and the contrast of 7-a-2 rumble spectrum;
Figure 10 is 2-b-2 and the contrast of 2-d-2 rumble spectrum;
Figure 11 is 3-b-2 and the contrast of 9-b-2 rumble spectrum;
Figure 12 is a 7-a surface roughness graphics;
Figure 13 is a 3-c surface roughness graphics;
Figure 14 is that the auxiliary experiment surface roughness of reinforcing of paraffin contrasts;
Figure 15 is that paraffin is filled the two-sided frame class of titanium alloy workpiece figure;
Figure 16 is an A frame ground floor web time of vibration course;
Figure 17 is a B frame ground floor web time of vibration course;
Figure 18 is A frame ground floor position 3 analysis of vibration signal;
Figure 19 is B frame ground floor position 3 analysis of vibration signal;
Figure 20 is an A frame second layer web time of vibration course;
Figure 21 is a B frame second layer web time of vibration course;
Figure 22 is the 3rd layer of web time of vibration course of A frame;
Figure 23 is the 3rd layer of web time of vibration course of B frame;
Figure 24 is the 4th layer of web time of vibration course of A frame;
Figure 25 is the 4th layer of web time of vibration course of B frame;
Figure 26 is A frame measuring position;
Figure 27 is B frame measuring position;
Figure 28 is A frame and the contrast of B frame web thickness;
Figure 29 is the contrast of different modes cast paraffin, and (a) laminated pouring adds gauze, and (b) laminated pouring does not add gauze, and (c) disposal pouring does not add gauze, and disposal pouring adds gauze;
Wherein: 1, paraffin is filled the processing unit (plant) of weak hard parts, and 2, clamping device, 3, workpiece system, 4, filled media (paraffin), 5, gauze, 6, delivery port, 7, air bleeding valve, 8, Pressure gauge, 9, water cover, 10, safety valve, 11, the paraffin lid, 12, housing, 13, water tank, 14, sealing ring, 15, seal washer, 16, nut, 17, coupling, 18, nipple, 19, ball valve, 20, flow export, 21, resistance wire, 22, electric wire, 23, rocking handle.
The specific embodiment
A kind of paraffin is filled the processing unit (plant) of weak hard parts, comprise paraffin apparatus for pouring and the water-bath heater below it, described paraffin apparatus for pouring comprises the housing 12 that holds paraffin, paraffin lid 11 is established at housing 12 tops, nearly bottom, housing 12 bottoms is provided with nipple 18, nipple 18 connects the outer coupling 17 of housing, and coupling 17 links to each other with flow export 20 by ball valve 19.
Described water-bath heater comprises the water tank 13 of sealing, is provided with heater in the water tank 13, establishes water cover 9 and delivery port 6 on the water tank 13.
Establish rocking handle 23 on the described paraffin lid 11.
Paraffin is filled the processing technology of weak hard parts:
(1) raw material is prepared
By calculating workpiece inside casing volume, and then calculate required solid paraffin amount, carry out raw-material preparation.But must strict control charging capacity.The charging off-capacity then can not fully be filled abdominal cavity in the frame, does not have good filling effect; Otherwise capacity is excessive, pours into a mould can overflow outside the frame after excessive.Paraffin filling device charging capacity can calculate with following empirical equation:
Q＝V·ρ
Q---charging capacity, Kg;
Total dischargeable capacity of V---workpiece inside casing, L;
The density of ρ---paraffin, g/cm
3
(2) paraffin melts
The heating-up temperature of paraffin can guarantee that for being controlled at 70 ℃ paraffin melts fast, also can shorten the paraffin condensation time, makes cool time in the acceptable scope.
(3) once-cast
The workpiece system 3 of required filling is placed on the platen, keep the workpiece water placing flat.Place one deck gauze 5 at the workpiece inside casing, open ball valve 19, atoleine is flowed out from flowing water mouth 20.Carry out paraffin first cast, but must be noted that pouring position, poring rate and water fluence.Pouring position must guarantee to be in workpiece inside casing top, preferably for the center, is convenient to the uniformity of pouring into a mould like this; Watering fluence is 3/4 volume of workpiece inside casing dischargeable capacity, and poring rate is controlled at 0.5m/s.After cast finished, normal temperature was placed 20min down, made the paraffin natural coagulation to certain degree, perhaps used measures such as supplementary means such as air-cooler to improve cooling velocity, reduced the condensation time.
(4) second pouring
On the basis of once-cast, spread layer gauze 5, carry out the second pouring of paraffin, watering fluence is workpiece inside casing remainder, and promptly watering fluence is back 1/4 volume of workpiece inside casing dischargeable capacity, and poring rate is decelerated to 0.25m/s, and frame is filled up.Must strict control poring rate when second pouring, be less than or equal to 0.25m/s, especially, more to keep speed low speed to go slowly in the cast end of a period stage, being convenient to like this has an accurate control for watering fluence, prevent simultaneously vasoliniment spill or excessive.After cast finishes, adopt normal temperature to place the nature condensation equally, the time is 20min, perhaps forces cooling (as adopting air-cooler etc.) to solidify paraffin.Close ball valve 19 after cast finishes, paraffin is melted filling device remove, away from platen.
(5) polishing
After the paraffin cooling, paraffin unrestrained or that spill is around removed during to cast, simultaneously the wax moulding surface is observed whether reach requirement, if do not meet the demands, as paraffin surface aspect ratio surface of the work height height, then to carry out certain polishing, remove unnecessary paraffin part.
(6) detect
Need the reviewer that the final result of paraffin cast is detected, must meet the requirements, arrive following standard:
A, paraffin hardness is checked whether observation paraffin fully solidifies.
B, surface of the work can not residual paraffin (remove paraffin is residual will be noted damaging surface of the work)
C, wax moulding surface can not be higher than the surface of the work height
(7) clamping
With the clamping workpiece after the paraffin filling, machining is carried out in the location.
(8) paraffin reclaims
After the workpiece completion of processing paraffin is recycled, note to damage workpiece machining surface when paraffin reclaims, the paraffin that reclaims is handled, remove the impurity such as smear metal of the paraffin that mixes, utilize again to realize the sustainable of paraffin.
Paraffin is filled the processing technology of weak hard parts:
(1) raw material is prepared
By calculating workpiece inside casing volume, and then calculate required solid paraffin amount, carry out raw-material preparation.But must strict control charging capacity.The charging off-capacity then can not fully be filled abdominal cavity in the frame, does not have good filling effect; Otherwise capacity is excessive, pours into a mould can overflow outside the frame after excessive.Paraffin filling device charging capacity can calculate with following empirical equation:
Q＝V·ρ
Q---charging capacity, Kg;
Total dischargeable capacity of V---workpiece inside casing, L;
The density of ρ---paraffin, g/cm
3
(2) paraffin melts
The heating-up temperature of paraffin can guarantee that for being controlled at 80 ℃ paraffin melts fast, also can shorten the paraffin condensation time, makes cool time in the acceptable scope.
(3) once-cast
The workpiece system 3 of required filling is placed on the platen, keep the workpiece water placing flat.Place one deck gauze 5 at the workpiece inside casing, open ball valve 19, atoleine is flowed out from flowing water mouth 20.Carry out paraffin first cast, but must be noted that pouring position, poring rate and water fluence.Pouring position must guarantee to be in workpiece inside casing top, preferably for the center, is convenient to the uniformity of pouring into a mould like this; When watering fluence and being 1/2 volume of workpiece inside casing dischargeable capacity, poring rate is controlled at 0.5m/s.After cast finished, normal temperature was placed 20min down, made the paraffin natural coagulation to certain degree, perhaps used measures such as supplementary means such as air-cooler to improve cooling velocity, reduced the condensation time.
(4) second pouring
On the basis of once-cast, a layer gauze 5 in shop carries out the second pouring of paraffin to the inside casing remainder, and watering fluence is back 1/2 volume of workpiece inside casing dischargeable capacity, and poring rate is decelerated to 0.20m/s, and frame is filled up.Must strict control poring rate when second pouring, especially, more to keep speed low speed to go slowly in the cast end of a period stage, being convenient to like this has an accurate control for watering fluence, prevent simultaneously vasoliniment spill or excessive.After cast finishes, adopt normal temperature to place the nature condensation equally, the time is 20min, perhaps forces cooling (as adopting air-cooler etc.) to solidify paraffin.Close ball valve 19 after cast finishes, paraffin is melted filling device remove, away from platen.
(5) polishing
After the paraffin cooling, paraffin unrestrained or that spill is around removed during to cast, simultaneously the wax moulding surface is observed whether reach requirement, if do not meet the demands, as paraffin surface aspect ratio surface of the work height height, then to carry out certain polishing, remove unnecessary paraffin part.
(6) detect
Need the reviewer that the final result of paraffin cast is detected, must meet the requirements, arrive following standard:
A, paraffin hardness is checked whether observation paraffin fully solidifies.
B, surface of the work can not residual paraffin (remove paraffin is residual will be noted damaging surface of the work)
C, wax moulding surface can not be higher than the surface of the work height
(7) clamping
With the clamping workpiece after the paraffin filling, machining is carried out in the location.
(8) paraffin reclaims
After the workpiece completion of processing paraffin is recycled, note to damage workpiece machining surface when paraffin reclaims, the paraffin that reclaims is handled, remove the impurity such as smear metal of the paraffin that mixes, utilize again to realize the sustainable of paraffin.
Effect test:
The little frame of rigidity part part a little less than the titanium alloy frame class among Fig. 5 is carried out paraffin fills, back oppose side wall is processed, under identical operating mode, the little frame of not filling paraffin is carried out sidewall processing simultaneously, Fig. 6 is the paraffin filling mode, vibration situation and the processing effect in the process compares under two kinds of situations of paraffin filling to having or not in the back, and table 1 is the auxiliary experiment feed strategy of reinforcing of paraffin.
Table 1 paraffin filled sidewall machining experiment feed strategy
The vibration acceleration signal that collects is analyzed, and Fig. 7 and Fig. 8 are respectively 7-a-2 (7 for little frame titles, and a is a sidewall title in the frame, and 2 when being second cutter for the feed number of times; X-m-y, x are the frame name, and m is the sidewall title, y is the feed number of times, and is following equivalent in meaning) and 3-c-2 process when vibration time course, vibration amplitude is 16.06 to the maximum in the 7-a-2 process, and the maximum of amplitude is 5.12 in the 3-c-2 process, only is about 1/3 of 7-a-2; And the whole process stage cutting of 7-a-2 is not steady, it is bigger to change fluctuation, early stage vibration signal less, cutting state is more stable, signal energy changes little, but it is very violent at the later stage vibration signal, consumed energy increases, and the whole process stage of 3-c-2 is very steady, and vibration slightly increases in the processing later stage, but growth trend is slower, and fluctuation range is little.
By to above-mentioned several groups of cutting contrast experiment vibration frequency specturm analysis, see Fig. 9,10 and Figure 11, find that the vibration effect that has or not paraffin to fill process is huge, fill paraffin and can effectively reduce vibration amplitude in the whole process.Table 2 is every group of spectral magnitude maximum that experiment is corresponding, is not adopting under the paraffin filling mode, and the rigidity of sidewall own is relatively poor, and in the process of titanium alloy thin wall spare, the vibration situation is very violent, and amplitude is generally bigger; And when filling paraffin, can effectively increase the rigidity of thin-wall part, improve the stability in its process, the vibration amplitude maximum is reduced to 31%～54% of no paraffin situation, amount of decrease is about 46%～69%, can effectively suppress and reduce the generation of high vibration.
Table 2 experiment rumble spectrum amplitude
By 7-a and 3-c finished surface pattern are analyzed, see Figure 12 and 13, discovery does not have under the auxiliary situation of reinforcing of paraffin, the tool marks of machined surface are very clear in the 7-a graphics, every index of roughness is all higher, adopt the auxiliary mode of reinforcing of paraffin, tooth marks diminish, and every index of roughness is also along with obvious reduction.Thus, utilize the tooth marks of paraffin auxiliary reinforcing can effectively reducing machined surface, and then improve the surface quality of thin-wall part processing.Among Figure 14,10 groups of measurement results of having processed the surface roughness of sidewall are compared, adopt the surface roughness value when paraffin is auxiliary to be reinforced to be starkly lower than the situation that does not add paraffin, amount of decrease is about 6%～25% and does not wait, and finished surface is more excellent.Adopt the auxiliary reinforcing mode of paraffin, can improve the processing rigidity of titanium alloy thin wall spare, improve the stability in the process, reduce vibration and energy consumption in the process, thereby improve machining status, make process become more steady, and then improve the machined surface quality, improve machining accuracy.
At the two-sided framework of rigidity a little less than the aero titanium alloy, Figure 15 carries out paraffin to one side and fills, and the back processes the reverse side web; Compare with the web processing situation of not filling under the paraffin situation simultaneously.
Every layer of thickness of cutting of each frame of table 3
A and B frame ground floor acceleration signal are analyzed, see Figure 16 and Figure 17, in order better data to be analyzed, in the signal of Figure 16 and Figure 17, select three specific regions to carry out moving average analysis, for position 1 is chosen in the process of cutter under the cutter, position 2 is selected in the feed process, and position 3 is chosen in the later stage of feed, Figure 18 and Figure 19, and each resample area is the comparatively violent position of vibration.
In A frame ground floor process, the web vibration signal is comparatively steady during following cutter, and vibration amplitude is smaller, mainly be down in the cutter process feed speed less, only be vf=41mm/min; And in the feed process, the vibration signal of web is bigger, and it is comparatively violent to fluctuate because this moment feed speed vf=81mm/min.In B frame ground floor process, its vibration signal rule and A frame are similar, in following cutter process, the B frame signal of filling paraffin is slightly less than the A frame signal of not filling paraffin, because the existence of paraffin, and then the rigidity of web is improved, but the initial rigidity of workpiece web is bigger, the paraffin filling effect is not clearly, so the cutter signal is more or less the same down; In the process of feed, this moment, B frame signal was about half of A frame, because this moment, thickness of cutting was 3.5mm, feed speed is also brought up to vf=81mm/min; In the later stage of feed, contrast Figure 18 and Figure 19, this moment, gap was comparatively obvious, and the fluctuation of A frame vibration signal is severe, but the B frame that adopts paraffin to fill, vibration signal is still comparatively steady, and amplitude only is to increase slightly to some extent with respect to position 2.In whole time domain Figure 16, as can be seen, the fluctuation of the vibration signal of position 3 is very violent, be 4 times of all the other each crests, mainly be the removal along with material, the integral rigidity of workpiece diminishes, and thickness of cutting and cutting speed are all less than changing, cause the workpiece machining state bad, cutter vibrate the most violently through directly over the unidirectional acceleration transducer time, and the B frame is owing to adopt the auxiliary filling of paraffin, material is removed the change influence of rigidity less, so process is comparatively steady.
Back three layers of processing vibration signal are analyzed, and Figure 20 and Figure 25 analyze the vibration signal in the AB two frame second layer web process, and following cutter process feed speed is little, so vibration signal is little, and relatively steadily.In the feed process, feed speed is relatively large, and cutting depth is 2mm, vibrates comparatively violently, and situation and ground floor process are similar, but the vibration signal of the vibration signal of A frame during much larger than the processing ground floor.The back is two-layer in following cutter process, because web thickness is less, a little less than the rigidity, to external world effect is " sensitivity " relatively, even feed speed is very little, the whereabouts degree of depth only is 0.5 and 0.3mm, but web still can gem-purely reflect, so the vibration signal of A frame is bigger in the two-layer cutter process down in back.And in the feed process, because cutting depth is less, well below preceding two-layer, this just causes in the feed of A frame signal on the contrary less than first and second layers.For the B frame, in the feed process on the contrary less than following cutter process, reason be in following cutter process directly over unidirectional acceleration, directly stressed, so vibration is comparatively responsive, and during feed, because the existence of paraffin, the rigidity of workpiece is relatively large, 0.5 and the cutting-in of 0.3mm is less to the influence of workpiece, so vibration is on the contrary little, but to the comparative analysis of each layer vibration signal, after finding to fill paraffin, vibration signal is comparatively steady in the process, and well below the situation of not filling paraffin, and web is thin more, the effect that paraffin is filled is obvious more, and process is stable more.
The processed workpiece web thickness is measured, web width is 57mm, measure so get 10 some positions when measuring, distance is 6mm between per two some positions, shown in concrete following Figure 26 in measuring position and 27, table 4 is a measurement result, can see among Figure 28 that the mode that adopts paraffin to fill can effectively improve the stability in the weak hard parts process, improve crudy, reduce mismachining tolerance.
Table 4 web thickness measurement result (mm)
Adopt the mode of paraffin filling, can effectively improve the workpiece rigidity of the weak rigidity part of titanium alloy frame class, under the situation of processing sidewall and web, all can improve the processing situation, help carrying out smoothly of process, reduce the oscillation phenomenon in the process, improve crudy.
Padding scheme to paraffin under laminated pouring paraffin and the shop gauze mode is studied, Figure 29, take pouring procedure in 4 respectively: do not add the once whole casting completes of gauze, add the once whole casting completes of gauze, laminated pouring all adds gauze for every layer, do not add the gauze laminated pouring, the result of back after to cast comprises that setting time, paraffin surface hardness and paraffin and surface of the work bond strength analyze.Under 18 ℃ of room temperatures, behind the cast 40min casting surface hardness to be analyzed, once-cast paraffin this moment is softer, does not also solidify fully; And the paraffin behind the laminated pouring solidifies fully, and the surface is very hard.Paraffin surface after solidifying is observed, and the paraffin surface behind the once-cast presents " recessed " shape, and with workpiece sidewall faying face height, and the center caves inward, and is lower; Paraffin surface is obviously more flat behind the laminated pouring, and sidewall junction and center difference in height are apart from being not very big, and the result of shop gauze is more obvious, and the paraffin surface height is more even.Acutely rock by the workpiece after cast is finished, observe paraffin and workpiece faying face situation, find not add gauze, paraffin combines not tight with workpiece, easily drop, and the shop gauze, paraffin combines with workpiece better, is difficult for dropping, and employing laminated pouring, the shop gauze number of plies is many more, and effect is good more, in conjunction with tight more.So adopt the mode of laminated pouring, can effectively reduce cool time, improve condensation effect, increase paraffin and workpiece bond strength.
Claims (9)
1. the processing technology of hard parts is characterized in that a little less than a paraffin was filled, and comprised that step is as follows:
(1) takes by weighing required solid paraffin amount;
(2) heating paraffin is melted;
(3) with paraffin workpiece is carried out laminated pouring;
(4) the polishing paraffin surface is to satisfy the workpiece requirement.
2. paraffin according to claim 1 is filled the processing technology of weak hard parts, it is characterized in that: described laminated pouring is for using paraffin once-cast workpiece at workpiece upper berth gauze, setting time can not be lower than 20min under the room temperature, repave last layer gauze paraffin second pouring, cooled and solidified, twice cast condensation time is not less than 40min.
3. paraffin according to claim 2 is filled the processing technology of weak hard parts, it is characterized in that: described once-cast and second pouring, once-cast waters fluence when being the 1/2-3/4 volume of workpiece inside casing dischargeable capacity, poring rate is controlled at 0.4-0.6m/s, second pouring waters fluence when being the back 1/4-1/2 volume of workpiece inside casing dischargeable capacity, poring rate is decelerated to 0.2-0.3m/s, and first and second builds the dischargeable capacity that total amount must be equal to or slightly less than the workpiece inside casing.
4. paraffin according to claim 1 is filled the processing technology of weak hard parts, and it is characterized in that: the amount of described paraffin is the product of the total dischargeable capacity and the paraffin density of workpiece inside casing.
5. paraffin according to claim 1 is filled the processing technology of weak hard parts, and it is characterized in that: the heating and melting temperature of described paraffin is controlled at 70 ℃-80 ℃.
6. the processing unit (plant) of hard parts a little less than a paraffin is filled, it is characterized in that, comprise paraffin apparatus for pouring and the water-bath heater below it, described paraffin apparatus for pouring comprises the housing that holds paraffin, case top is established the paraffin lid, the nearly bottom of lower housing portion is provided with nipple, and nipple connects the outer coupling of housing, and coupling links to each other with flow export by ball valve.
7. paraffin according to claim 6 is filled the processing unit (plant) of weak hard parts, it is characterized in that described water-bath heater comprises the water tank of sealing, is provided with heater in the water tank, establishes water cover and delivery port on the water tank.
8. paraffin according to claim 7 is filled the processing unit (plant) of weak hard parts, it is characterized in that, establishes Pressure gauge and safety valve on the described water tank.
9. paraffin according to claim 6 is filled the processing unit (plant) of weak hard parts, it is characterized in that described paraffin covers establishes rocking handle.
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| CN113443118A (en) * | 2021-09-01 | 2021-09-28 | 成都飞机工业（集团）有限责任公司 | Aircraft component, filling structure for aircraft component process stiffening and installation method |
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| CN104511754A (en) * | 2013-09-30 | 2015-04-15 | 哈尔滨飞机工业集团有限责任公司 | Machining method of thin-wall curved surface type part |
| CN105436823A (en) * | 2015-11-24 | 2016-03-30 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for controlling machining deformation of thin-walled part |
| CN105436823B (en) * | 2015-11-24 | 2018-10-09 | 沈阳黎明航空发动机(集团)有限责任公司 | A method of control thin-walled parts machining deformation |
| CN105538113A (en) * | 2015-12-07 | 2016-05-04 | 上海现代先进超精密制造中心有限公司 | Slender through hole punching method |
| CN105538113B (en) * | 2015-12-07 | 2018-05-04 | 上海现代先进超精密制造中心有限公司 | The drilling method of slightness hole |
| CN106782481B (en) * | 2016-12-28 | 2020-07-28 | 西安航天远征流体控制股份有限公司 | Micro-pore forming method for fluoroplastic silencer |
| CN106782481A (en) * | 2016-12-28 | 2017-05-31 | 西安航天远征流体控制股份有限公司 | A kind of fluoroplastics silencer micropore manufacturing process |
| CN110757292A (en) * | 2019-11-08 | 2020-02-07 | 上海闻泰信息技术有限公司 | Shell polishing method, shell and electronic equipment |
| CN112338624A (en) * | 2020-10-30 | 2021-02-09 | 中国航发贵州黎阳航空动力有限公司 | Method for preventing large-scale complex part cutting foreign matter residue |
| CN113443118A (en) * | 2021-09-01 | 2021-09-28 | 成都飞机工业（集团）有限责任公司 | Aircraft component, filling structure for aircraft component process stiffening and installation method |
| CN113443118B (en) * | 2021-09-01 | 2022-01-25 | 成都飞机工业（集团）有限责任公司 | Aircraft component, filling structure for aircraft component process stiffening and installation method |
| CN115121845A (en) * | 2022-08-29 | 2022-09-30 | 成都航飞航空机械设备制造有限公司 | Double-sided machining device for aviation parts |
| CN115121845B (en) * | 2022-08-29 | 2022-12-02 | 成都航飞航空机械设备制造有限公司 | Double-sided machining device for aviation parts |
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