CN102729002A - Method for machining combined crankshaft of crank round slide block and special clamp therefor - Google Patents
Method for machining combined crankshaft of crank round slide block and special clamp therefor Download PDFInfo
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- CN102729002A CN102729002A CN2012100920071A CN201210092007A CN102729002A CN 102729002 A CN102729002 A CN 102729002A CN 2012100920071 A CN2012100920071 A CN 2012100920071A CN 201210092007 A CN201210092007 A CN 201210092007A CN 102729002 A CN102729002 A CN 102729002A
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- 238000000034 method Methods 0.000 title claims abstract description 67
- 238000003754 machining Methods 0.000 title claims abstract description 31
- 238000005520 cutting process Methods 0.000 claims abstract description 28
- 230000002093 peripheral effect Effects 0.000 claims description 99
- 230000008569 process Effects 0.000 claims description 39
- 239000002994 raw material Substances 0.000 claims description 5
- 230000007704 transition Effects 0.000 abstract description 5
- 230000004323 axial length Effects 0.000 abstract 1
- 238000005553 drilling Methods 0.000 abstract 1
- 238000007514 turning Methods 0.000 description 11
- 230000007246 mechanism Effects 0.000 description 10
- 238000003672 processing method Methods 0.000 description 9
- 239000012467 final product Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004807 localization Effects 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
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- 238000005242 forging Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
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Abstract
The invention provides a method for machining a combined crankshaft of a crank round slide block. The method comprises the following steps of: clamping the outer circumference of a crankshaft blank, and machining central holes on two axial end faces; machining a smooth outer circumference at two ends of the crankshaft blank on the basis of the central holes; taking a positioning block of the special clamp as an inner seam allowance and sleeving the positioning block on the smooth outer circumference from the two ends of the crankshaft blank; drilling a central hole on a crank pin through a crank pin positioning hole of the positioning block; machining a main shaft journal outer circumference and a crank outer circumference of the crankshaft blank by taking the central hole as the positioning reference; machining the outer circumference of each section of the crank pin by taking the central hole of the crank pin as the positioning reference; and slitting the crankshaft into a crank section and a crank throw section perpendicular to the axis of the crankshaft, wherein the crank section comprises a transition section; machining a conical hole corresponding to the conical surface at the front end of the crank pin on the crank by taking the outer circumference of the transition section as the reference; and cutting the transition section and excessive axial length to obtain the crank. The invention also provides a positioning block for the method. According to the machining method, the machining requirements of the combined crankshaft can be met.
Description
Technical field
The present invention relates to circular slider-crank mechanism, particularly the processing method of circular slider-crank mechanism built-up crankshaft.The present invention is provided for the special fixture of this method simultaneously.
Background technology
Circular slider-crank mechanism is a kind of reciprocal-rotary motion conversion mechanism that is used for substituting traditional toggle; There is not connecting rod in this mechanism; Make the size of entire mechanism can be, and the dynamic balancing effect of entire mechanism be significantly improved less than traditional toggle.
In said mechanism, smooth block need be enclosed within on the crank-pin of bent axle through its eccentric orfice, because the two ends of bent axle are provided with crank, trunnion, in the middle of crank-pin was enclosed in, during assembling, smooth block directly was not enclosed within the mounting condition on the crank-pin.
For addressing the above problem, can smooth block be designed to the combined type smooth block, promptly smooth block is split up into two parts in the eccentric orfice position, and two parts can be combined through parts such as bolts, like this, just can above-mentioned smooth block be installed on the crank-pin.Because aforesaid way has obviously weakened the intensity of smooth block, generally can not adopt this design in practice.
The more feasible solution of another one is to adopt built-up crankshaft.Name is called " part, bent axle and the internal combustion engine, the compressor that are used for internal combustion engine or compressor crank shaft ", and number of patent application is that 200810226417.4 Chinese patent promptly provides a kind of built-up crankshaft.According to different concrete conditions, this built-up crankshaft has different concrete forms.The vuilt-up crankshaft of a kind of small-sized two-stroke single Cylinder engine that provides with first embodiment of the specification specific embodiment of this patent is an example; This bent axle comprises that one is singly turned and a crank; Said singly turning is provided with crank-pin; This crank-pin one end is provided with trunnion and crank arm, and the other end is open.The end of the opening of said crank-pin is designed to awl end, this awl hold with crank on the taper hole that is provided with match.During installation, after smooth block is inserted in through the end of the opening of above-mentioned crank-pin, more said crank is matched with crank-pin, two parts are installed together, form complete bent axle.The foregoing description is the embodiment that this patent provides, and in this patent, the form of the vuilt-up crankshaft that adopts crutches mechanism and two crank formation of processing separately is provided also, and other more complicated built-up crankshaft.
Combinations thereof formula bent axle has solved the problem of smooth block and bent axle assembling, and the remarkable decline of the intensity of the smooth block that aforesaid combined type smooth block scheme causes can not occur adopting.Through disclosed crank in the above-mentioned patent application with singly turn the special location structure design of (perhaps crutches); The phase relation that can guarantee crank, crank-pin, maneton various piece is accurate; Guarantee crank pin axis and crankshaft center line parallel co-planar, and have good detachability.Therefore, adopt combinations thereof formula bent axle to become the optimal selection of circular slider-crank mechanism.
But there are a lot of difficult points in the processing of above-mentioned bent axle itself.For bent axle, guarantee that morpheme relations such as crank pin axis and crankshaft center line parallel co-planar are extremely important.After forming the different part processing of combinations thereof formula bent axle, combine when forming complete bent axle, can't satisfy the requirement of the morpheme relation of bent axle each several part usually.
In order to address the above problem, need to adopt more suitable method of processing parts.
Summary of the invention
The present invention provides the processing method of crank round slider built-up crankshaft, and this method can guarantee that the built-up crankshaft various piece machines back assembling when becoming complete bent axle, and the morpheme relation of bent axle various piece adheres to specification.
The present invention provides a kind of special fixture that is used for above-mentioned processing method simultaneously.
The present invention provides a kind of method of processing the crank round slider built-up crankshaft,
Employing has the crank shaft blank of complete bent axle shape as processing raw material;
The outer peripheral face of clamping crank shaft blank, in its axial both ends of the surface machining center hole, and cutting crankshaft two end face is the plane;
With the both ends of the surface centre bore is benchmark, at the axial two ends of crank shaft blank, inwardly processes one section outer peripheral face from end face respectively, obtains to be positioned at the smooth outer peripheral face at crank shaft blank two ends;
Locating piece with special fixture is sleeved on the above-mentioned smooth outer peripheral face from the crank shaft blank two ends with inner stopper, and it is rotated to suitable position, and is fixed as one through the locating piece of location structure with two ends; Said correct position, promptly the crank-pin locating hole line of the locating piece at two ends is through the approximate centre position of crank shaft blank crank-pin section; The outside dimension of the inner stopper internal diameter of said locating piece and the smooth outer peripheral face of its suit matches;
With the crank-pin locating hole of drill bit, get the crank-pin centre bore in the crank shaft blank both ends of the surface through said locating piece;
Remove anchor clamps;
With the centre bore is positioning reference, the trunnion outer peripheral face of machining crankshafts blank, crank outer peripheral face; And be positioning reference with said crank-pin centre bore, each section of processing crank-pin outer peripheral face comprises the changeover portion outer peripheral face of the conical surface, crank-pin and crank of outer peripheral face, the crank-pin front end of crank-pin cylindrical section;
Cut this bent axle perpendicular to crankshaft center line, it is divided into crank section, crank throw section, wherein crank section comprises the changeover portion of crank-pin and crank;
With said changeover portion outer peripheral face is benchmark, is the center with the crank-pin centre bore on the outer face of this crank, processing and the corresponding taper hole of the crank-pin front end conical surface on crank;
With the changeover portion of crank section and axial unnecessary length excision, obtain the crank of required size.
Preferably, the locating piece of said special fixture has the central through hole corresponding with the centre bore of crankshaft end-face, and the center of circle of this central through hole is the center of circle of locating piece inner stopper; Anchor clamps are rotated to suitable position, and after using location structure that the locating piece at two ends is fixed as one, uses toply, pass through this central through hole, withstand the centre bore that is positioned on the crank shaft blank both ends of the surface from two ends; This central through hole is a unthreaded hole, and the external diameter on the then top face of cylinder and the internal diameter of said central through hole cooperate, and this central through hole is a screwed hole, and the then top face of cylinder is the thread segment that is mated, and top screw-in mode with threaded engagement is passed through this central through hole; Top withstand centre bore after, carry out the said step of getting two set of bell cranks pin centre bores.
Preferably; Said is benchmark with the both ends of the surface centre bore; At the axial two ends of crank shaft blank; Inwardly process one section outer peripheral face from end face respectively, acquisition is arranged in the step of the smooth outer peripheral face at crank shaft blank two ends, and the smooth outer peripheral face at said two ends is the outer peripheral face with same diameter requirement and tolerance.
Preferably, the location structure on the said special fixture is the through hole that is positioned at four jiaos of locating pieces, saidly is fixed as one through the locating piece of location structure with two ends, specifically is to be fixed as one with two locating pieces that the stay bolt that passes above-mentioned through hole will be positioned at two ends.
Preferably, said bent axle is to have two sections perhaps bent axles of crank-pin more than two sections; The crank-pin locating hole of the locating piece of the special-purpose tool of said folder is two, and its line of centres is through its inner stopper center of circle.
Preferably, said bent axle is the bent axle with one section crank-pin; The crank-pin locating hole of said special fixture is one.
The present invention provides a kind of special fixture of processing the crank round slider built-up crankshaft simultaneously; This special fixture comprises that two can be passed through a pair of locating piece of location structure positioning clamping at the crank shaft blank two ends; Said locating piece integral body is tabular; It simultaneously is provided with a circle inner stopper, and the outer peripheral face external diameter of a certain end of crank shaft blank after the internal diameter of this inner stopper and the processing matches, and is one smooth against the plane in this inner stopper; The said place's through hole that is provided with at least against the plane, this through hole is the crank-pin locating hole, its distance of center circle equals the crankshaft center line of bent axle to be processed and the distance between the crank pin axis from the distance in the center of circle of said inner stopper; Position outside the inner stopper of locating piece, being provided with can be with two relative location structure that locating piece links together; This special fixture also comprises the connector that two locating pieces are linked together.
Preferably, the center in this locating piece inner stopper against the plane, promptly the home position of inner stopper is provided with place's through hole, and this through hole is called central through hole; Described central through hole is unthreaded hole or screwed hole.
Preferably, the said two place's crank-pin locating holes that are provided with against the plane lay respectively at the both sides in the inner stopper center of circle.
Preferably, the cross section of said locating piece is square, and said location structure is to be arranged on four jiaos through hole or screwed hole; Through stay bolt can be one with the mutual positioning clamping of locating piece that cooperates with the crank shaft blank both ends of the surface respectively.
The present invention provides the processing method of crank round slider built-up crankshaft; The characteristics of this method are; Use a complete crank shaft blank for processing raw material; This blank has comprised the processing prototype of each parts of bent axle to be processed, promptly comprises crank section and crank throw section, and at both intersection one section changeover portion is set.First these blank both ends of the surface of cutting and on both ends of the surface, process centre bore utilize centre bore to process to be positioned at the outer peripheral face at these crank shaft blank both ends.Using special fixture to cooperate with these crank shaft blank both ends of the surface and the above-mentioned outer peripheral face that is positioned at both ends then, use fixture, is one with the clamps at two ends.Then, process the crank-pin centre bore through the crank-pin locating hole that is provided with on the anchor clamps.Then, be positioning reference with the centre bore of crankshaft end-face, the outer peripheral face of processing crank and the maneton outer peripheral face of crank throw; And be positioning reference with the crank-pin centre bore, processing crank-pin outer peripheral face (cylindrical section and awl end that comprise crank-pin), and the outer peripheral face of said changeover portion.Interface with changeover portion and crank-pin is boundary then, and this crank shaft blank is carried out perpendicular cuts, will contain crank-pin singly turn or crutches cut down.The part that comprises crank in addition, the outer peripheral face with the changeover portion on it is a locating surface again, the taper hole corresponding with the awl end of crank-pin on the processing crank obtains crank.In the above-mentioned process, require the cutting benchmark of the outer peripheral face of each coaxial shaft part all to obtain positioning processing on the crank shaft blank spare of an integral body on identical centre bore, make and vertically go up discontinuous each shaft part and have good coaxial relation.And the position of different centre bores obtains through the anchor clamps location, has guaranteed the position relation that the bent axle each several part is confirmed.
Anchor clamps provided by the invention can be confirmed the position relation of central hole of the crankshaft and crank-pin centre bore, guarantee as machining benchmark each to mutual alignment relation between the centre bore accurately.
Description of drawings
Fig. 1 is the assembled state figure of the built-up crankshaft that need process of first embodiment of the invention;
Fig. 2 is the released state figure of the built-up crankshaft that need process of first embodiment of the invention;
Fig. 3 is the flow chart of first embodiment of the invention;
Fig. 4 is the crank shaft blank front view of first embodiment of the invention;
Fig. 5 is the crank shaft blank front view after first embodiment of the invention step S102 machines;
Fig. 6 is the crank shaft blank front view after first embodiment of the invention step S103 machines;
Fig. 7 is the front view of the locating piece of the special fixture that adopts of first embodiment of the invention;
Fig. 8 is the sectional view of the locating piece of the special fixture that adopts of first embodiment of the invention;
Fig. 9 is the crank shaft blank front view behind the first embodiment of the invention step S104;
Figure 10 is the crank shaft blank front view after first embodiment of the invention step S105 machines;
Figure 11 be can employable drill bushing among the first embodiment of the invention step S105 sectional view;
Figure 12 is the crank shaft blank front view after first embodiment of the invention step S106 accomplishes;
Figure 13 is the crank shaft blank front view after first embodiment of the invention step S107 machines;
Figure 14 is the crank shaft blank front view after first embodiment of the invention step S108 machines;
Figure 15 is the crank section front view after first embodiment of the invention step S109 machines;
Figure 16 is the crank front view after first embodiment of the invention step S110 machines;
Figure 17 is the assembled state figure of the built-up crankshaft that need process of second embodiment of the invention;
Figure 18 is the released state figure of the built-up crankshaft that need process of second embodiment of the invention;
Figure 19 is the flow chart of second embodiment of the invention;
Figure 20 is the crank shaft blank front view of second embodiment of the invention;
Figure 21 is the crank shaft blank front view after second embodiment of the invention step S202 machines;
Figure 22 is the crank shaft blank front view after second embodiment of the invention step S203 machines;
Figure 23 is the front view of the locating piece of the special fixture that adopts of second embodiment of the invention;
Figure 24 is the sectional view of the locating piece of the special fixture that adopts of second embodiment of the invention;
Figure 25 is the crank shaft blank front view behind the second embodiment of the invention step S204;
Figure 26 is the crank shaft blank front view after second embodiment of the invention step S205 machines;
Figure 27 is the crank shaft blank front view after second embodiment of the invention step S206 accomplishes;
Figure 28 is the crank shaft blank front view after second embodiment of the invention step S207 machines;
Figure 29 is the crank shaft blank front view after second embodiment of the invention step S208 machines;
Figure 30 is the crank section front view after second embodiment of the invention step S209 machines;
Figure 31 is the crank front view after second embodiment of the invention step S210 machines.
The specific embodiment
First embodiment of the invention provides a kind of method of processing built-up crankshaft.In the present embodiment, this built-up crankshaft specifically is to comprise a pair of crank of processing separately that is positioned at crankshaft two end, and the built-up crankshaft of three parts compositions of the crutches in the middle of being positioned at.Fig. 1 illustrates the front view of the complete bent axle that forms after this built-up crankshaft assembling; Fig. 2 illustrates the situation when this built-up crankshaft is unassembled to be in released state before.The number of patent application that the applicant who also can reference background technology part mentions about the detailed structure of this bent axle proposes is 200810226417.4 Chinese patent.
Can find out that this bent axle comprises first crank 1, crutches 2 and second crank 3.
Said first crank 1 has identical structure with second crank 3, is cylindrical piece, and is respectively arranged with the first crank taper hole 1-1, the second crank taper hole 3-1 that is offset to a side on the cylindrical piece.The outer peripheral face of first crank 1 and second crank 3 all uses as the trunnion of bent axle.
Bent axle after the assembling, the said trunnion 2-2 and first crank 1, second crank, 3 threes' axis forms crankshaft center line.For this bent axle, need guarantee the mutual morpheme relation of the crank pin axis of crankshaft center line and two crank-pins, promptly be parallel to each other and axis between have the distance of setting.Said crankshaft center line is made up of the axis of above-mentioned first crank 1, crutches 2 and 3 three individual part of second crank jointly, if three parts process respectively, then can be owing to there not being common machining benchmark, the axis of formation is difficult on the same straight line; In addition, this axis is difficult to guarantee parallel with the axis of crank-pin.For guaranteeing that the bent axle after the assembling can obtain needed morpheme relation, the special processing technology that need take.First embodiment of the invention promptly provides a kind of processing technology of morpheme relation of the bent axle after can guaranteeing to assemble.Also use a kind of special fixture among this embodiment, this special fixture is the embodiment of special fixture provided by the invention.
Please referring to Fig. 3, this illustrates the flow chart of the method for the processing crank round slider built-up crankshaft that first embodiment of the invention provides.Please be simultaneously referring to Fig. 4-Fig. 6 and Fig. 9-Figure 15, after above-mentioned figure be the different processing stages completion of method of the processing crank round slider built-up crankshaft that provides of first embodiment of the invention, the front elevational schematic of crank shaft blank.Fig. 7, Fig. 8 then are the sketch mapes of the anchor clamps that use in this processing method.
Step S101 adopts the crank shaft blank with complete bent axle shape as processing raw material.
Fig. 4 illustrates the complete unprocessed state of this crank shaft blank.As shown in Figure 4, this crank shaft blank can obtain through modes such as forging, castings, and the entity to be processed of three parts of composition built-up crankshaft is all on this crank shaft blank.This crank shaft blank has been shaped to the form of bent axle; Comprise first crank section 1 ', second crank section 3 ', crutches section 2 '; The end of two crank-pin sections of said crutches section 2 ' is connected to first crank section 1 ' and second crank 3 ' through first changeover portion 2 '-1-1, second changeover portion 2 '-3-1 respectively.The diameter of said first changeover portion 2 '-1-1, second changeover portion 2 '-3-1 is less than the diameter of crank-pin section.The outer surface of above-mentioned blank is coarse, need process just to reach needed size, and its size is further processing and has reserved surplus.
Step S102, the outer peripheral face of clamping crank shaft blank, at its axial both ends of the surface machining center hole A, and cutting crankshaft two end face is the plane.
The anchor clamps of clamping crank shaft blank can be the anchor clamps of V-type, crank shaft blank is clamped in centre, V-type position gets final product, and carry out the processing of machining center hole and cutting plane then.The outer peripheral face of concrete clamping is advisable with the outer peripheral face of first crank section 1 ' and second crank section 2 ', does not also get rid of the outer peripheral face of gripper crank pin section.
Above-mentioned in both ends of the surface machining center hole and cutting crankshaft two end face be the step on plane, order can be put upside down.That is to say, promptly can first centering after the cutting plane, also can first cutting plane after centering.Consider centre bore follow-up need be as positioning reference, and at the Surface Machining centre bore of blank, its quality can be affected, and advises centering behind the first cutting plane.The method of cutting both ends of the surface can adopt any method that can the cutting plane in the prior art, comprises milling, turning, mill, plane etc., and what relatively possibly adopt is the above two.Centre bore gets final product with the drill bit of special centering, need centre bore be broken into to have suitable tapering, be convenient to be mated top be that benchmark holds this crank shaft blank with this centre bore.
The front schematic view of the crank shaft blank after machining is seen Fig. 5.
Step S103 is a benchmark with the both ends of the surface centre bore, at the axial two ends of crank shaft blank, inwardly processes one section outer peripheral face from end face respectively, obtains to be positioned at the crank shaft blank two ends and to have the smooth outer peripheral face B that same diameter requires.
So-called is benchmark with the both ends of the surface centre bore, the top crank shaft blank that withstands that promptly matches with tapering with centre bore, and like this, crank shaft blank has promptly obtained reliable localization.The line of centre bore is exactly the further axis of processing of crank shaft blank.Through top rotation, adopt turning processing can crank shaft blank be processed one section outer peripheral face from inward at both ends.In the present embodiment, the diameter that is positioned at the outer peripheral face at two ends requires to equate, the length of processing also equates, is convenient to production and processing like this, also is convenient to and the cooperating of special fixture.Certainly, can be processed as different diameters fully.Like this, the special fixture that use the back then need use two different locating pieces of inner stopper internal diameter to make up, and is obviously not too reasonable, also there is no need; Certainly, do not get rid of this kind mode that in particular cases adopts as the case may be.The concrete cutting process of this step can adopt the scheme that possibly adopt under any prior art except turning, also might as well adopt the new possible scheme that produces along with technical development, in a word, as long as process the smooth outer peripheral face of this section.The front schematic view of the crank shaft blank after machining is seen Fig. 6.
Step S104 fixes above-mentioned crank shaft blank and special fixture.
Said special fixture comprise a pair of can be through the location structure positioning clamping at the locating piece at crank shaft blank two ends, and the connector that connects above-mentioned locating piece.
Please referring to Fig. 7 and Fig. 8, the above-mentioned structure that illustrates locating piece.Wherein Fig. 7 shows the front view of locating piece, and Fig. 8 illustrates the sectional view of this locating piece.
Said locating piece 4 integral body are square tabular, and it simultaneously is provided with a circle inner stopper 4-1, and the outer peripheral face external diameter of the crank shaft blank end after the internal diameter of this inner stopper and the processing matches.In this inner stopper 4-1, be a smooth 4-2 against the plane; Saidly in the 4-2 of plane, three place's through holes are set.Comprise the first crank-pin locating hole 4-3, central through hole 4-4, the second crank-pin locating hole 4-5, three's the center of circle forms straight line at vertical direction.
Said central through hole 4-4 is positioned at the center of 4-2 against the plane of this locating piece 4 inner stopper 4-1, i.e. the home position of inner stopper 4-1, and for having the screwed hole of internal thread.Certainly, this central through hole 4-4 also can be set to unthreaded hole.
The said first crank-pin locating hole 4-3, the second crank-pin locating hole 4-5 then are positioned at the both sides of above-mentioned central through hole 4-4, and the distance in the center of circle of the first crank-pin locating hole 4-3, the second crank-pin locating hole 4-4 and the center of circle of said central through hole 4-4 equals the crankshaft center line of bent axle and the distance between the crank pin axis.
Position outside the inner stopper 4-1 of locating piece 4 in present embodiment, is four jiaos of locating piece 4, and through hole 4-6 is set respectively, and above-mentioned through hole 4-6 can pass through stay bolt.Use one group of four stay bolt as connector, can two relative locating pieces 4 be linked together.
The locating piece 4 of above-mentioned special fixture is sleeved on the above-mentioned smooth outer peripheral face B from crank shaft blank two ends shown in Figure 6 with inner stopper 4-1, locating piece 4 is rotated to suitable position; Cylindrical section had the said central through hole 4-4 of externally threaded top screw-in; Withstand on the centre bore A that has accomplished fluently of said crank shaft blank the top tip of its taper, can guarantee that like this centre bore A that has got on central through hole 4-4 and the crank shaft blank end face of this locating piece 4 is coaxial.Then, use stay bolt to pass above-mentioned through hole 4-6, re-use connector cooperations such as nut, can the locating piece 4 at two ends be fixed as one.Because cooperation top and centre bore; And the locking of bolt; Make the locating piece 4 that is positioned at two ends form an integral body, and locating piece 4 is under top effect with crank shaft blank; Its central through hole 4-4 is consistent with the central hole location of crank shaft blank end face, for follow-up crank-pin locating accuracy is given security.
Said locating piece 4 is rotated to correct position; Even the crank-pin locating hole line of two locating pieces 4 is through the approximate centre position of crank shaft blank crank-pin section; Particularly; Promptly the line of the hole heart of the first crank-pin locating hole 4-3 of two locating pieces 4 is through the axis of the first crank-pin section 2 '-1, and the line of the hole heart of the second crank-pin locating hole 4-5 of two locating pieces 4 is through the axis of the second crank-pin section 2 '-3.Certainly, above-mentioned can only be axial location roughly through crank-pin section axis, because; This bent axle still is in the blank state, and outer peripheral face is rough, and its axis is difficult to confirm; And relying on artificial naked eyes location also can not be very accurate, as long as roughly almost, because blank provides enough allowance; Follow-up processing can be confirmed real crank pin axis, and this crank pin axis is exactly that this location is confirmed in theory.Situation after the fixing completion of these anchor clamps and crank shaft blank is as shown in Figure 9.In this sketch map, the anchor clamps locating piece has partly adopted cutaway view, so that see the position in its each hole and the relation of crank shaft blank clearly.
Step S105 with first crank-pin locating hole 4-3, the second crank-pin locating hole 4-5 of drill bit through said locating piece 4, gets the first crank-pin centre bore C1, C2 and the second crank-pin centre bore C3, C4 in the crank shaft blank both ends of the surface.
Owing to be provided with the crank-pin locating hole on the above-mentioned locating piece 4; And two locating pieces 4 are provided with the crank-pin locating hole on identical position; Through the connection of stay bolt and the positioning action of centre bore, be positioned on the locating piece 4 at two ends, corresponding crank-pin locating hole is just in time relative.As long as drill bit can be got the crank-pin centre bore in the satisfactory position on the finished end face of crank shaft blank through this hole.In the present embodiment, need get four crank-pin centre bores altogether in the crank shaft blank both ends of the surface, wherein C1, C2 are the first crank-pin centre bore, and C3, C4 are the second crank-pin centre bore.Crank shaft blank front view after machining is seen Figure 10.
In order to have better locating effect, also can in the crank-pin locating hole, add drill bushing 5 shown in Figure 11, the position of drill bit punching can be more accurate like this.
Because as the positioning reference of processing crank-pin, the centre bore tapering that therefore processes needs and follow-up top taper fit the crank-pin centre bore in subsequent handling, the surface also needs enough smooth.
Step S106 removes anchor clamps.
This step is that subsequent handling is prepared.Crank shaft blank behind the removal anchor clamps is shown in figure 12.
Step S107, each of machining crankshafts section outer peripheral face.
The precedence of processing each section outer peripheral face is random arranged as required, specifically is to process as follows.
1, with the centre bore be positioning reference, after the clamping, maneton 2 '-2 outer peripheral face of the crutches section 2 ' of machining crankshafts blank, and the outer peripheral face of the outer peripheral face of first crank section 1 ', second crank section 3 '.Above-mentioned outer peripheral face is formed the trunnion outer peripheral face of bent axle jointly; In fact these outer peripheral faces have confirmed the axis of bent axle, and above-mentioned three sections outer peripheral faces require coaxial, therefore; Must process with identical positioning reference, could guarantee preferably really to be in each other on same the axis.In the present embodiment, three sections outer peripheral faces are positioning reference processing with the centre bore of crank shaft blank end face all, and process three sections outer peripheral faces behind a clamping, make its axiality each other obtain good assurance.
2, be positioning reference with the said first crank-pin centre bore C1, C2; With top behind this crank shaft blank of two ends clamping; Process the first crank-pin section, 2 '-1 each section outer peripheral face, comprise the outer peripheral face of changeover portion 2 '-1-1 of the conical surface, crank-pin and crank of outer peripheral face, the crank-pin front end of crank-pin cylindrical section.Because above-mentioned crank-pin centre bore has all been guaranteed the distance of itself and centre bore through anchor clamps, therefore, the axis of the crank-pin that can guarantee to process and the distance of crankshaft center line meet the requirements.
3, same; With the said second crank-pin centre bore C3, C4 is positioning reference; With top behind this crank shaft blank of two ends clamping; Process second each section of crank-pin outer peripheral face, comprise the changeover portion 2 '-3-1 outer peripheral face of the conical surface, crank-pin and crank of outer peripheral face, the crank-pin front end of crank-pin cylindrical section.
Above-mentioned three processing are benchmark with three pairs of locating holes, and each processing respectively has each section outer peripheral face of coaxial requirement, can guarantee the requirement of the axiality of each section.In the above-mentioned steps; Behind each clamping, also should process the some other part that need process with this positioning reference simultaneously, for example; The processing of first crank-pin 2 '-1 and position, trunnion 2 '-2 boundary need processed when being positioning reference with the first crank-pin centre bore C1, C2.These details require to arrange according to the manufacturing of part manufacturing, meet general technology general knowledge, because concrete part all has many variations on details, no longer specify at this.In a word, each clamping all should be accomplished the processing of relative dimensions under this all positioning references through a clamping as far as possible.
Crank shaft blank after this step is accomplished is shown in figure 13.
Step S108 cuts this bent axle perpendicular to crankshaft center line, and it is divided into crank section, crutches section, and wherein crank section comprises the changeover portion of said crank-pin and crank.
The bent axle that need make for present embodiment only need carry out the cutting perpendicular to crankshaft center line in the endface position of the awl end of the first crank-pin section 2 '-1 of crutches section 2 ' and the second crank-pin section 2 '-3, cuts this bent axle and gets final product.After this step machines, promptly can obtain individual part crutches 2, need not further processing.Certainly; After if this step is accomplished, the crank-pin front end conical surface of crutches 2 still exists not meet makes the part that requires, and also can process the end face of crank-pin as required; Like grinding etc., make the length of crank-pin end finish and crank-pin meet dimensional requirement.
After above-mentioned cutting is accomplished, the still undressed completion of said crank section, first crank section 1 ' comprises that first changeover portion 2 '-1-1, second crank section 3 ' comprise second changeover portion 2 '-3-1, the outer peripheral face of above-mentioned changeover portion is all processed at step S107.The sketch map of the crank shaft blank after this step is accomplished is shown in figure 14.
Step S109 is a benchmark with the changeover portion outer peripheral face on each crank, is the center with the crank-pin centre bore on the outer face of this crank, processing and the corresponding taper hole of the crank-pin front end conical surface on crank.
As stated, the crank section after the cutting also comprises corresponding changeover portion, and the effect of this changeover portion is, for the processing of this step provides positioning reference.Through this changeover portion of clamping, can be machining benchmark promptly with the axis of changeover portion, carry out the processing of the taper hole of crank.This machining benchmark is very important for the taper hole that the conical surface with the crank-pin front end on the processing crank matches.Because for the complete bent axle that is assembled into one, the axis of the taper hole on the crank must with the axis of crank-pin point-blank, this just needs both to have common machining benchmark.In the method, the benchmark of processing changeover portion outer peripheral face is that same machining benchmark is adopted in the processing of the crank-pin centre bore and the crank-pin front end conical surface.Be that benchmark is processed described taper hole with the changeover portion outer peripheral face in this step, then being equivalent to is benchmark with the crank-pin centre bore indirectly.Certainly, said reference conversion can produce the deviation that twice clamping produces, and the actual axis of the changeover portion outer peripheral face that processes and said crank-pin centre bore line and the incomplete deviation that causes of mismachining tolerances such as coincidence.But if be the processing that positioning reference carries out the crank taper hole with the crank section outer peripheral face directly, then being equivalent to aforesaid centre bore is that the relation of the benchmark processing and the crank-pin centre bore line that carry out the crank taper hole is farther, and the deviation that causes is bigger.Therefore, adopt this processing scheme obviously more reasonable.Crank section after the processing such as Figure 15.
Step S110 with the changeover portion of crank section and axial unnecessary length excision, obtains the crank of required size.
Through this step, can obtain satisfactory first crank 1 and second crank 3.This crank can form complete bent axle through the crank-pin front end cone match of its taper hole and the aforementioned crutches that machine 2.The processing rear crank is shown in figure 16.
Certainly; Above-mentioned bent axle also needs further to process the locating hole that crank and crutches combine; This locating hole is the dowel hole of the interface position of the crank-pin front end conical surface and crank taper hole; Need two parts back that combines to process, and need the cooperation of relevant anchor clamps at rigging position accurately.Owing to be not inventive point of the present invention, skip at this.
Among above-mentioned first embodiment; The method that provides a kind of processing to have the built-up crankshaft of two sections crank-pins, this method are equally applicable to have the processing of the bent axle of multistage crank-pin, because the crank-pin of the bent axle of multistage crank-pin also has only two axis; Promptly with the foregoing description in the dead in line of crank-pin; So its processing scheme is consistent, when needing only, processes coaxial a plurality of crank-pin sections simultaneously and get final product with crank-pin centre bore location processing outer peripheral face.
Second embodiment of the invention provides a kind of processing to have the method for the built-up crankshaft of one section crank-pin.The bent axle that present embodiment need be processed comprises and singly turning and two on crank crankshaft part independently.Figure 17 illustrates the front view of the complete bent axle that forms after this built-up crankshaft assembling; Figure 18 illustrates the situation when this built-up crankshaft is unassembled to be in released state before.Can find out, this bent axle comprise two independently the part list turn 6 with crank 7.Its morpheme relation requires identical with first embodiment.
Please be simultaneously referring to Figure 19, this figure is the flow chart of second embodiment of the invention.
Step S201 adopts the crank shaft blank with complete bent axle shape as processing raw material.
Figure 20 illustrates the complete unprocessed state of this crank shaft blank.This crank shaft blank passes through to forge or casting obtains, and the entity to be processed of two parts of composition built-up crankshaft is all on this crank shaft blank.This crank shaft blank has been shaped to the form of bent axle, comprises the singly section of turning 6 ', crank section 7 ', and the end of the crank-pin of the said singly section of turning 6 ' is connected to crank section 7 ' through changeover portion 6 '-1-1.The diameter of said changeover portion 6 '-1-1 is less than the diameter of crank-pin section 6 '-1.The outer surface of above-mentioned blank is coarse, need process just to reach needed size, and its size is further processing and has reserved surplus.
Step S202, the outer peripheral face of clamping crank shaft blank, at its axial both ends of the surface machining center hole D, and cutting crankshaft two end face is the plane.
The anchor clamps of clamping crank shaft blank can be the anchor clamps of V-type, crank shaft blank is clamped in centre, V-type position gets final product, and carry out the processing of machining center hole and cutting plane then.
Above-mentioned in both ends of the surface machining center hole and cutting crankshaft two end face be the step on plane, order can be put upside down.That is to say, promptly can first centering after the cutting plane, also can first cutting plane after centering.Consider centre bore follow-up need be as positioning reference, and at the Surface Machining centre bore of blank, its quality can be affected, centering behind the preferred first cutting plane.The method of cutting both ends of the surface can adopt any method that can the cutting plane in the prior art, comprises milling, turning, mill, plane etc., certainly relatively maybe employing be the above two.Centre bore gets final product with the drill bit of special centering, need centre bore be broken into to have suitable tapering, be convenient to be mated top be that benchmark holds this crank shaft blank with this centre bore.Crank shaft blank after the processing such as Figure 21.
Step S203 is a benchmark with the both ends of the surface centre bore, at the axial two ends of crank shaft blank, inwardly processes one section outer peripheral face from end face respectively, obtains to be positioned at the crank shaft blank two ends and to have the smooth outer peripheral face E that same diameter requires.
So-called is benchmark with the both ends of the surface centre bore, the top crank shaft blank that withstands that promptly matches with tapering with centre bore, and like this, crank shaft blank has promptly obtained reliable localization.The line of centre bore is exactly the further axis of processing of crank shaft blank.Through top rotation, adopt turning processing can crank shaft blank be processed one section outer peripheral face from inward at both ends.In the present embodiment, the diameter that is positioned at the outer peripheral face at two ends requires to equate, the length of processing also equates, is convenient to production and processing like this, also is convenient to and the cooperating of anchor clamps.Crank shaft blank sketch map after the processing is seen Figure 22.
Step S204 fixes above-mentioned crank shaft blank and special fixture.
Said special fixture comprise a pair of can be through the location structure positioning clamping at the locating piece at crank shaft blank two ends, and the connector that connects above-mentioned locating piece.Locating piece among the structure of this locating piece and above-mentioned first embodiment is basic identical, and just its crank-pin locating hole has only one.The fixed form of this locating piece and crank shaft blank is also consistent with above-mentioned first embodiment, repeats no more at this.The front view of this locating piece is seen Figure 23, and sectional view is seen Figure 24.Sketch map after locating piece and crank shaft blank are fixing is seen Figure 25.
Step S205 with the crank-pin locating hole of drill bit through said locating piece, gets the crank-pin centre bore in the crank shaft blank both ends of the surface.Crank shaft blank sketch map after this step is accomplished is seen Figure 26.
Step S206 removes anchor clamps.
This step is that subsequent handling is prepared.Crank shaft blank spare Figure 27 behind the removal anchor clamps.
Step S207, each of machining crankshafts section outer peripheral face.
The precedence of processing each section outer peripheral face is random arranged as required, specifically is to process as follows.
1, with the centre bore be positioning reference, after the clamping, the maneton outer peripheral face of the singly section of turning 6 ' of machining crankshafts blank, and the outer peripheral face of crank section 7 '.Above-mentioned outer peripheral face is formed the trunnion outer peripheral face of bent axle jointly, has confirmed the axis of bent axle, and above-mentioned two sections outer peripheral face must be processed with identical positioning reference, could guarantee preferably really to be in each other on same the axis.In the present embodiment, two sections outer peripheral faces are positioning reference processing with the centre bore of crank shaft blank end face all, and process two sections outer peripheral faces behind a clamping, make its axiality each other obtain good assurance.
2, the crank-pin centre bore with the crank shaft blank both ends of the surface is a positioning reference; With top behind this crank shaft blank of two ends clamping; Processing crank-pin section 6 '-1 each section outer peripheral face comprises the changeover portion 6 '-1-1 outer peripheral face of the conical surface, crank-pin and crank of outer peripheral face, the crank-pin front end of crank-pin cylindrical section.Because above-mentioned crank-pin centre bore has all been guaranteed the distance of itself and centre bore through anchor clamps, therefore, the axis of the crank-pin that can guarantee to process and the distance of crankshaft center line meet the requirements.
The sketch map of the crank shaft blank after machining is seen Figure 28.
Step S208 cuts this bent axle perpendicular to crankshaft center line, and it is divided into crank section, the single section of turning, and wherein crank section comprises the changeover portion of crank-pin and crank.
The bent axle that need make for present embodiment only need carry out the cutting perpendicular to crankshaft center line in the endface position of the awl end that singly turns 6 ' crank-pin 6 '-1, cuts this bent axle and gets final product.After this step machines, promptly can obtain individual part and singly turn 6, need not further processing.Certainly; After if this step is accomplished, singly turn 6 the crank-pin front end conical surface and still exist not meet and make the part that requires, also can process the end face of crank-pin as required; Like grinding etc., make the length of crank-pin end finish and crank-pin meet dimensional requirement.
After above-mentioned cutting is accomplished, the still undressed completion of said crank section, this crank section has comprised changeover portion 6 '-1-1, the outer peripheral face of above-mentioned changeover portion is processed at step S207.Bent axle after cutting is accomplished is shown in figure 29.
Step S209 is a benchmark with said changeover portion outer peripheral face, is the center with the crank-pin centre bore on the outer face of this crank, goes up processing and the corresponding taper hole of the crank-pin front end conical surface in crank section 7 '.Crank section after machining is seen Figure 30.
Step S210 with the changeover portion of crank section and axial unnecessary length excision, obtains the crank of required size.
Through this step, can obtain satisfactory crank 6.The cone match that singly turns 7 crank-pin front end that this crank can machine through its taper hole and aforementioned forms complete bent axle.Crank after machining is seen Figure 31.
Certainly; The locating hole that above-mentioned bent axle also needs further to process crank and singly turns combination; This locating hole is the dowel hole of the interface position of the crank-pin front end conical surface and crank taper hole; Need two parts back that combines to process, and need the cooperation of relevant anchor clamps at rigging position accurately.Owing to be not inventive point of the present invention, skip at this.
The processing method that above-mentioned two embodiment that provide have adopted; Be characterized in adopting complete crank shaft blank to form the processing of each part of vuilt-up crankshaft, like this, can make the positioning reference of processing unified; Need coaxial part all to adopt identical machining benchmark perhaps to adopt rational machining benchmark transition method on the different parts; The former is like the processing of crank outer peripheral face and crank throw (crutches or singly turn) maneton outer peripheral face, although each several part is on the different parts, and an equal clamping in this processing method; Machine with same benchmark, make the axiality that is positioned at different parts obtain to ensure.The processing of the latter such as crank-pin and crank taper hole, through the transition of changeover portion, the positioning reference that makes both obtain to be similar to, axiality can obtain to guarantee preferably equally.
Another characteristics of this processing method are to use special fixture, and this special fixture makes through centre bore acquisition crank-pin centre bore very convenient, has guaranteed between crankshaft center line and the crank pin axis apart from according with process requirements.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (10)
1. a method of processing the crank round slider built-up crankshaft is characterized in that,
Employing has the crank shaft blank of complete bent axle shape as processing raw material;
The outer peripheral face of clamping crank shaft blank, in its axial both ends of the surface machining center hole, and cutting crankshaft two end face is the plane;
With the both ends of the surface centre bore is benchmark, at the axial two ends of crank shaft blank, inwardly processes one section outer peripheral face from end face respectively, obtains to be positioned at the smooth outer peripheral face at crank shaft blank two ends;
Locating piece with the described special fixture of claim 7 is sleeved on the above-mentioned smooth outer peripheral face from the crank shaft blank two ends with inner stopper, and it is rotated to suitable position, and is fixed as one through the locating piece of location structure with two ends; Said correct position, promptly the crank-pin locating hole line of the locating piece at two ends is through the approximate centre position of crank shaft blank crank-pin section; The outside dimension of the inner stopper internal diameter of said locating piece and the smooth outer peripheral face of its suit matches;
With the crank-pin locating hole of drill bit, get the crank-pin centre bore in the crank shaft blank both ends of the surface through said locating piece;
Remove anchor clamps;
With the centre bore is positioning reference, the trunnion outer peripheral face of machining crankshafts blank, crank outer peripheral face; And be positioning reference with said crank-pin centre bore, each section of processing crank-pin outer peripheral face comprises the changeover portion outer peripheral face of the conical surface, crank-pin and crank of outer peripheral face, the crank-pin front end of crank-pin cylindrical section;
Cut this bent axle perpendicular to crankshaft center line, it is divided into crank section, crank throw section, wherein crank section comprises the changeover portion of crank-pin and crank;
With said changeover portion outer peripheral face is benchmark, is the center with the crank-pin centre bore on the outer face of this crank, processing and the corresponding taper hole of the crank-pin front end conical surface on crank;
With the changeover portion of crank section and axial unnecessary length excision, obtain the crank of required size.
2. the method for processing crank round slider built-up crankshaft according to claim 1; It is characterized in that; The locating piece of said special fixture has the central through hole corresponding with the centre bore of crankshaft end-face, and the center of circle of this central through hole is the center of circle of locating piece inner stopper; Anchor clamps are rotated to suitable position, and after using location structure that the locating piece at two ends is fixed as one, uses toply, pass through this central through hole, withstand the centre bore that is positioned on the crank shaft blank both ends of the surface from two ends; This central through hole is a unthreaded hole, and the external diameter on the then top face of cylinder and the internal diameter of said central through hole cooperate, and this central through hole is a screwed hole, and the then top face of cylinder is the thread segment that is mated, and top screw-in mode with threaded engagement is passed through this central through hole; Top withstand centre bore after, carry out the said step of getting two set of bell cranks pin centre bores.
3. according to the method for claim 1 or 2 described processing crank round slider built-up crankshafts; It is characterized in that; Said is benchmark with the both ends of the surface centre bore, at the axial two ends of crank shaft blank, inwardly processes one section outer peripheral face from end face respectively; Acquisition is arranged in the step of the smooth outer peripheral face at crank shaft blank two ends, and the smooth outer peripheral face at said two ends is the outer peripheral face with same diameter requirement and tolerance.
4. according to the method for claim 1 or 2 described processing crank round slider built-up crankshafts; It is characterized in that; Location structure on the said special fixture is the through hole that is positioned at four jiaos of locating pieces; Saidly being fixed as one through the locating piece of location structure with two ends, specifically is to be fixed as one with two locating pieces that the stay bolt that passes above-mentioned through hole will be positioned at two ends.
5. according to the method for claim 1 or 2 described processing crank round slider built-up crankshafts, it is characterized in that said bent axle is to have two sections perhaps bent axles of crank-pin more than two sections; The crank-pin locating hole of the locating piece of the special-purpose tool of said folder is two, and its line of centres is through its inner stopper center of circle.
6. according to the method for claim 1 or 2 described processing crank round slider built-up crankshafts, it is characterized in that said bent axle is the bent axle with one section crank-pin; The crank-pin locating hole of said special fixture is one.
7. special fixture of processing the crank round slider built-up crankshaft; It is characterized in that; This special fixture comprises that two can be passed through a pair of locating piece of location structure positioning clamping at the crank shaft blank two ends, and said locating piece integral body is tabular, and it simultaneously is provided with a circle inner stopper; The outer peripheral face external diameter of a certain end of crank shaft blank after the internal diameter of this inner stopper and the processing matches, and is one smooth against the plane in this inner stopper; The said place's through hole that is provided with at least against the plane, this through hole is the crank-pin locating hole, its distance of center circle equals the crankshaft center line of bent axle to be processed and the distance between the crank pin axis from the distance in the center of circle of said inner stopper; Position outside the inner stopper of locating piece, being provided with can be with two relative location structure that locating piece links together; This special fixture also comprises the connector that two locating pieces are linked together.
8. the anchor clamps of processing crank round slider built-up crankshaft according to claim 7 is characterized in that, the center in this locating piece inner stopper against the plane, and promptly the home position of inner stopper is provided with place's through hole, and this through hole is called central through hole; Described central through hole is unthreaded hole or screwed hole.
9. the anchor clamps of processing crank round slider built-up crankshaft according to claim 7 is characterized in that, the said two place's crank-pin locating holes that are provided with against the plane lay respectively at the both sides in the inner stopper center of circle.
10. the anchor clamps of processing crank round slider built-up crankshaft according to claim 7 is characterized in that, the cross section of said locating piece is square, and said location structure is to be arranged on four jiaos through hole or screwed hole; Through stay bolt can be one with the mutual positioning clamping of locating piece that cooperates with the crank shaft blank both ends of the surface respectively.
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| CN201210092007.1A CN102729002B (en) | 2012-03-30 | 2012-03-30 | The processing method of crank round slider built-up crankshaft |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210092007.1A CN102729002B (en) | 2012-03-30 | 2012-03-30 | The processing method of crank round slider built-up crankshaft |
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| CN102729002A true CN102729002A (en) | 2012-10-17 |
| CN102729002B CN102729002B (en) | 2015-10-28 |
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| CN201210092007.1A Expired - Fee Related CN102729002B (en) | 2012-03-30 | 2012-03-30 | The processing method of crank round slider built-up crankshaft |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103273286A (en) * | 2013-06-18 | 2013-09-04 | 南车戚墅堰机车车辆工艺研究所有限公司 | Crankshaft machining method and special tool for crankshaft machining |
| CN104002107A (en) * | 2014-06-12 | 2014-08-27 | 靖江市顺达模具厂 | Machining method of agricultural vehicle speed changing box front box body |
| CN104028949A (en) * | 2014-06-10 | 2014-09-10 | 江苏非凡仪器仪表有限公司 | Method for processing valve element |
| TWI495524B (en) * | 2013-11-08 | 2015-08-11 | Univ Chienkuo Technology | Lathe multi-eccentric fixture |
| CN107984031A (en) * | 2017-12-28 | 2018-05-04 | 重庆祥祖机械有限公司 | Decompression pin flat cutting frock and decompression pin production method |
| CN112108843A (en) * | 2020-09-22 | 2020-12-22 | 一汽解放汽车有限公司 | Crankshaft machining process |
| CN113146537A (en) * | 2021-04-23 | 2021-07-23 | 西安交通大学 | Combined installation tool structure and method for universal tolerance split crankshaft |
| CN113829094A (en) * | 2021-10-20 | 2021-12-24 | 内江金鸿曲轴有限公司 | Crankshaft center hole machining process |
| CN117548698A (en) * | 2024-01-12 | 2024-02-13 | 无锡煤矿机械股份有限公司 | Spray pump processingequipment |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103273286A (en) * | 2013-06-18 | 2013-09-04 | 南车戚墅堰机车车辆工艺研究所有限公司 | Crankshaft machining method and special tool for crankshaft machining |
| CN103273286B (en) * | 2013-06-18 | 2015-09-23 | 南车戚墅堰机车车辆工艺研究所有限公司 | A kind of method for processing crankshaft and special tooling |
| TWI495524B (en) * | 2013-11-08 | 2015-08-11 | Univ Chienkuo Technology | Lathe multi-eccentric fixture |
| CN104028949A (en) * | 2014-06-10 | 2014-09-10 | 江苏非凡仪器仪表有限公司 | Method for processing valve element |
| CN104002107A (en) * | 2014-06-12 | 2014-08-27 | 靖江市顺达模具厂 | Machining method of agricultural vehicle speed changing box front box body |
| CN107984031A (en) * | 2017-12-28 | 2018-05-04 | 重庆祥祖机械有限公司 | Decompression pin flat cutting frock and decompression pin production method |
| CN112108843A (en) * | 2020-09-22 | 2020-12-22 | 一汽解放汽车有限公司 | Crankshaft machining process |
| CN113146537A (en) * | 2021-04-23 | 2021-07-23 | 西安交通大学 | Combined installation tool structure and method for universal tolerance split crankshaft |
| CN113146537B (en) * | 2021-04-23 | 2022-10-25 | 西安交通大学 | Combined installation tool structure and method for universal tolerance split crankshaft |
| CN113829094A (en) * | 2021-10-20 | 2021-12-24 | 内江金鸿曲轴有限公司 | Crankshaft center hole machining process |
| CN117548698A (en) * | 2024-01-12 | 2024-02-13 | 无锡煤矿机械股份有限公司 | Spray pump processingequipment |
| CN117548698B (en) * | 2024-01-12 | 2024-03-12 | 无锡煤矿机械股份有限公司 | Spray pump processingequipment |
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