Working procedure realizes the efficient treatment of crankshaft oily aperture centrally

Treatment of crankshaft oily aperture machines one of medium difficulty as crankshaft, the treatment method that uses at present is the collateral treatment craft with dispersive working procedure, this kind of method covers an area of a face to accumulate element of big, interference and inaccuracy to decide an element much, cutting tool is complex and administrative cost is higher. Limited company of car of wood of Chongqing Chang'an bell passes ceaseless exploration, the full treatment that into crankshaft oil aperture fastens finishs working procedure concentration in only station equipment, make machine efficiency to rise not only, and reduced production cost effectively. Treatment of crankshaft oily aperture is one of difficulty in crankshaft treatment, besides the characteristic that has deep aperture treatment, because be three-dimensional between Kong Yukong,still distributing. Because each section dimension, appearance and stiffness all differ, because this gives fixed position, clamp, bore and refrigeration,wait to bring very great difficulty. Current, more traditional treatment method is: The collateral treatment craft with dispersive working procedure, and use compound cutting tool mostly. Such craft covers an area of a face to accumulate element of big, interference and inaccuracy to decide an element much, cutting tool is complex and administrative cost is higher. Because workshop of my company workshop is narrower, if adopt conventional technology,get used to the manufacturing need of my company very hard. The full treatment that this asks our working procedure is centered on only station equipment to finish crankshaft oily aperture to fasten, improve efficiency further. The treatment technology that my company uses now introduces below, accomplished not only all oil aperture is being finished after stage equipment installs sheet last time is treatment, and rose to machine efficiency, reduced cost, can yet be regarded as is worth the technique that everybody draws lessons from one kind. Department of crankshaft oily aperture and treatment ask 1.

The crankshaft treatment line of my company is full automatic turn product line, its metre is 150s. Suffer field to restrict, the principle that can use working procedure to center only forms automation product line. In the initial stage that build a line via integrated technology assess, when plan is examined, agree finally to adopt the treatment technology that finishs oily aperture to tie all hole on a private plane. 2.

From the graph 1 in can see, have 4 φ 5.

Via of neck of main shaft of 5mm × 52mm, 4 φ 5.

5mm × 100mm two two to the oil of main shaft neck that turns over 15 ° the aperture of aperture and be well versed in of oily aperture of connecting rod journal, in the meantime, the attempt uses the twist drill cutting tool that takes central oil filler point to carry out Kong Jia to be versed in. Graph the construction of crankshaft of 4 crocks of engine that company of timber of 1 Chang'an bell produces at present 3.

Material of crankshaft semifinished product is medium alloy steel of carbolic manganese vanadium, its hardness is HB230 ～ 285. 4.

Cutting tool uses twist drill of coating of common hard alloy. Department of crankshaft oily aperture machines special machine tool to pursue the shafting of 2 special machine tools distributings setting of this special machine tool controls Ⅰ of head of two main shaft and Ⅱ , such setting also is to improve manufacturing efficiency further. The attempt faces below 2 in each motion of main part and function do in order to describe: Above all when crankshaft installation arrives on this private plane, according to the graph 1 advocate view level is placed between head wearing and rear push frame. Graph 2 in each component all is in perpendicular plane in, if the coordinate department of this private plane pursues 3. Ⅰ of main shaft head and Ⅱ have X, Y, Z3 severally directional translation, still have respective B to roll, of broach advocate cutting moves, can come true to change a knife automatically. Its are basic parameter sees a table 1, 2, 3. Head wearing and rear push frame realize clamp, drive crankshaft C to roll. Rear push frame can delay X axial shift, implementation crankshaft throws this machine. Its are basic parameter refers to a watch 4. Fixed position clamping apparatus can delay X axial shift, realize the phasic fixed position when crankshaft is installed, counteractive crankshaft is in the cutting force when bore. Two side of Ⅰ of main shaft head and Ⅱ set warehouse of a knife each, cutting tool monitoring and warning device is set in knife library, when discovery has cutting tool to break off, equipment calls the police automatically, because cutting tool breaks off to be caused to equipment and crankshaft,prevent destroy. In addition, electric control system uses Ximen subsystem. Graph coordinate of 3 private plane fastens Nextpage to express Ⅰ of head of 1 main shaft and Ⅱ linear the B Xiang Xuan that mobile technology parameter expresses Ⅰ of head of 2 main shaft and Ⅱ turns technical parameter expresses Ⅰ of head of 3 main shaft and parameter of Ⅱ main shaft to express 4 to wear C Xiang Xuan to turn technical parameter.

Install crankshaft: Because be full automatic line, fluctuation crankshaft all is finished by manipulator. When installing crankshaft, Ⅰ of main shaft head and Ⅱ delay Y direction to back down, fixed position clamping apparatus and rear push frame delay X direction to advance to formulary position, fixed position clamping apparatus (see a picture 4) two clip claw and a top rise oil cylinder, at this moment two clip claw is stretched, the top rises oil cylinder to be in fall next positions. Manipulator sends bent axle, clip claw is shut crankshaft is phasic by fixed position, head wearing and rear push frame at the same time clamp, the top rises crock of top. Crankshaft is reached the designated position by exact location clamp. The 10s when using. Graph clamping apparatus of 4 fixed position 2.

Use short broach to get 4 φ 5.

Aperture of 5mm × 52mm, use C axis to turn 180 ° , to drilling crankshaft journal oily hole; Ⅰ of head of left main shaft is gotten left 2 oily aperture, Ⅱ of main shaft head is gotten on the right side of on the right side of 2 oily aperture; The 40s when using (cutting tool No.

1 with attitude is changed 8 times between crankshaft) . 3.

Platform of oily aperture of journal of milling connecting rod, the 10s when using (cutting tool No.

2 with attitude is changed 4 times between crankshaft) . 4.

Auger cut oily aperture of connecting rod journal to guide aperture, the 10s when using (cutting tool No.

1 with attitude is changed 4 times between crankshaft) . 5.

Auger cut 4 φ 5.

Journal of connecting rod of 5mm × 100mm is oily the join aperture of oily aperture of Kong Yuqu journal, the 40s when using (cutting tool No.

3 with attitude is changed 4 times between crankshaft) . Nextpage6.

Two end pour crankshaft neck oily aperture horn, the 10s when using (cutting tool No.

4 with attitude is changed 8 times between crankshaft) . 7.

Crankshaft goes to burr inside neck oily aperture, the 10s when using (cutting tool No.

1 with attitude is changed 4 times between crankshaft) . 8.

Oily aperture of connecting rod journal goes burr, the 10s when using (cutting tool No.

4 with attitude is changed 4 times between crankshaft) . 9.

Ⅰ of main shaft head and Ⅱ are exited, mechanical at hand expects, the 10s when using. Implementation is efficient get the measure that cuts faculty of crankshaft oily aperture to realize efficient treatment to have the following old way commonly: 1.

Equipment itself can get used to high speed, deep aperture the pace of each division of labor that successive cutting asks to machine working procedure from crankshaft can see, the attitude commutation between cutting tool and crankshaft is amounted to 36 times. To satisfy the requirement that machines efficiency, performance of equipment oneself trends must be stabilized. Lathe bed uses metalloid whole pouring, use blame tigidity to join with the ground; Reduce mobile component quality as far as possible (use high speed electric machinery, belt-conveyor) ; Raise mobile component to move deputy stiffness (use have beforehand pressure orbit) ; Reduce facility as far as possible the vibration of other part (the vibration in motion of knife library door, equipment defends the door runs medium vibration in equipment) the influence to treatment. Head wearing, rear push frame and installation of whole of part of fixed position clamping apparatus are above lathe bed, the oscillatory much that their athletic place produces is absorbed entirely by lathe bed, and be in actual drilling process, only C axis whirligig, won't produce apparent effect to main shaft head. From the watch 4 in can see, the static stiffness that the head wears is taller. In addition, of Ⅰ of main shaft head, Ⅱ before bearing is installed as far as possible in close from broach place. Knife library cent is 2 or so, the quality that reduces knife library as far as possible (capacity of library of actual design knife is 4 knives greatly most) , machining in order to avoid head of a main shaft, head of another main shaft is changing the effect that knife place produces. The pressure that locates the top of clamping apparatus rises oil cylinder is OK set, utmost ground makes sure crankshaft needs in the stiffness when bore. 2.

Because each axis uses real time control,satisfy the fixed position precision that this working procedure asks accurately, made sure crankshaft and cutting tool are in correct positional position to fall constantly effectively. Such equipment are in monitoring constantly in, encounter unusual call the police immediately. B Xiang Xuan turns and C Xiang Xuan turns precision of requirement fixed position is 0.

003 ° ; X, Y, Z to precision of mobile fixed position is 0.

007mm. Integrated afore-mentioned 1, 2, because we adopted the dynamic stiffness that all sorts of measure rise and assures equipment and fixed position precision, the implementation that is efficient bore built a reliable hardware platform. 3.

Cutting tool and cutting tool change cutting tool uses twist drill of coating of common hard alloy. To raise cutting tool durability, outside dividing the technology of cutting tool coating that used already special maturity, still use drop lubricant technology. Hardness of crankshaft semifinished product: HB230 ～ 285. Below afore-mentioned conditions, we get 4 φ 5.

Journal of connecting rod of 5mm × 100mm is oily when the join aperture of oily aperture of Kong Yuqu journal, cutting speed is 80m/min, feed speed is every turn 0.

25mm; The cutting speed below other condition is 100m/min, feed speed turns for every 0.

3mm. Fumble through ours, cutting tool grinds life again the shortest it is No.

3 (see a table 5) the clew after achieving 170 prepares to change a knife. When achieving this to worry a demand again, its bore length already amounted to 70m, outclass is identical the durability of the cutting tool below the condition. In the meantime, change automatically to realize cutting tool, used knife handle of interface of HSK-A 40 standard, divide the implementation that change a knife automatic outside, also facilitate long grind exercise. Because used technology of cutting tool coating and drop,express service life of 5 each cutting tool lubricant technology, make the service life of cutting tool is lengthened greatly not only, more rose to machine efficiency; Use drop lubricant technology is divided make sure use twist drill is successive uninterrupted auger cut deep hole, and because use cutting liquid no longer, also avoided cutting fluid system not to stabilize brought adverse effect, make production cost is reduced greatly. 4.

Shorten auxiliary time assists time to shorten as far as possible, use to cutting tool ground undertook be optimizinged adequately, from the watch 6 can see, full treatment used 4 cutting tool only, shortened not only so auxiliary time, reduced production cost and administrative cost effectively. In loop of whole 150s treatment, cutting tool cutting is actual time is not worth 70s, many time is used at the attitude of cutting tool and crankshaft to adjust. Exact location and fixed position affirm reliably, hand in be finished by equipment oneself and affirm, allocate on average every time attitude adjusts there also is 2s to control only when using. Express 6 crankshaft ability qualitative chemical composition is additional, through be being explored ceaselessly, we mastered the briefest service life of all sorts of cutting tool, install in watch of cutting tool parameter, after changing a knife, be counted to achieve early-warning by treatment crankshaft currently several, the system is automatic make early-warning, clew prepares in time to change the cutting tool of corresponding number. Integrated afore-mentioned 3, 4, as a result of each positive step that we take in craft respect, make efficient treatment is mixed reduce production cost to be able to come true at the same time, satisfied whole crankshaft product line to coordinate the demand of orderly production. Through a year of half move actually, prove this equipment achieved our earlier expect result. Summary is efficient machine and reduce production cost both often be contradiction. We use modern technology, the attempt makes both the uniform standard that hopes to us in existing technical level make known to lower levels, the result that and was obtained expects. We believe, future can have the solution with better more apply in production. CNC Milling