CN102717239B - Method for machining connecting rod of air compressor and drilling and hinging fixture - Google Patents

Method for machining connecting rod of air compressor and drilling and hinging fixture Download PDF

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Publication number
CN102717239B
CN102717239B CN201210231811.3A CN201210231811A CN102717239B CN 102717239 B CN102717239 B CN 102717239B CN 201210231811 A CN201210231811 A CN 201210231811A CN 102717239 B CN102717239 B CN 102717239B
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CN
China
Prior art keywords
hole
rod
riser
drill
sides
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CN201210231811.3A
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Chinese (zh)
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CN102717239A (en
Inventor
邓秋兰
廖永周
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永安市金声机械有限公司
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Priority to CN201210231811.3A priority Critical patent/CN102717239B/en
Publication of CN102717239A publication Critical patent/CN102717239A/en
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Publication of CN102717239B publication Critical patent/CN102717239B/en

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Abstract

The invention provides a method for machining a connecting rod of an air compressor and a drilling and hinging fixture and relates to machining of a connecting rod. The method comprises the following steps of performing rough milling on a connecting rod blank to obtain an annular boss plane; turning a small-head hole; milling two side planes of a square block body; marking the steel grade; performing split cutting on a connecting rod body and a rod cover; tapping a screw hole of the rod cover; fixing the connecting rod body and the rod cover into a whole; grinding the combination and the annular boss plane; performing fine boring of a large-head hole and the small-head hole; pressing a bushing into the small-head hole; and rolling the large-head hole and the small-head hole. The method is characterized in that after the process of marking the steel grade is finished, the small-head hole of the connecting rod blank is sleeved into the locating pin of the drilling and hinging fixture in a movable fit manner; the large-head hole is pressed and adhered to the annular boss by use of a press plate so as to be adhered to and located at a flitch in the drilling and hinging fixture; the two side surfaces of the square bock body are jacked and located by virtue of top bolts; two output shafts of a multidrill are lengthened; and after respectively passing through the drilling template and drill sleeve of the drilling and hinging fixture, a step drill bit is aligned with a drilled step hole and the upper hole of the step hole on the hinged square bock body, and then the split cutting process is carried out. The method provided by the invention has the advantages that the locating accuracy and reloading accuracy of once step hole processing are high, and the production process is optimized.

Description

A kind of machine-tooled method of air-compressor connecting rod and the frock that drills and reams
Technical field:
The present invention relates to the machine-tooled method of connecting rod machining, particularly a kind of air-compressor connecting rod and the frock that drills and reams.
Background technology:
Connecting rod is the strength member of air compressor, and function is rotatablely moving of bent axle to be changed into the reciprocating motion of piston.Connecting rod is comprised of gonnecting rod body, bowl cover, lining, connection bolt.Gonnecting rod body is shaped as the siamese part of upper axis body, middle part long plate shape body, bottom packet.Packet lower surface, bottom is provided with the semicircle orifice that Open Side Down, and a semi-circular boss of semicircle orifice outer front/rear end projection, is respectively arranged with longitudinal hole on the bottom packet of semicircle orifice both sides.Bowl cover packet upper surface is provided with the semicircle orifice of opening upwards, a semi-circular boss of semicircle orifice outer front/rear end projection, and semicircle orifice both sides are respectively arranged with longitudinal stepped hole.Gonnecting rod body, bowl cover are to be processed by connecting rod blank machine, and connecting rod blank shape is the siamese part of upper axis body, middle part long plate shape body, the full packet in bottom.Bottom full packet central authorities are provided with big end hole, and big end hole outer front/rear end is an annulus boss of projection respectively.Gonnecting rod body longitudinal hole is coaxial isometrical as gonnecting rod body and the fit locating hole being connected of bowl cover with the longitudinal stepped hole upper hole of bowl cover, is inserted in and connects bolt enforcement location and be fixedly connected with.
Existing processing technology is: connecting rod blank is rough milled to corase grind front and back annulus boss plane, the microcephaly hole of car upper axis body processed, the full packet of milling two sides plane, beat grade of steel, the complete horizontal split of packet cuts into gonnecting rod body and bowl cover, milling gonnecting rod body and bowl cover faying face, drill and two longitudinal holes of articulation gonnecting rod body, drill two longitudinal stepped holes of bowl cover, two longitudinal stepped holes of articulation bowl cover, bowl cover stepped hole bottom hole tapping, connecting bolt screws up and in bowl cover lower thread hole, implements gonnecting rod body and fix with bowl cover location is fit through gonnecting rod body longitudinal hole, annulus raised head face after fine grinding zoarium, right boring concentric reducer hole, in microcephaly hole, be pressed into lining, with roll extrusion burnishing-in cutter roll extrusion concentric reducer hole.
This processing technology is after the milling of connecting rod blank is opened, respectively the locating hole of gonnecting rod body and bowl cover is processed one by one again, i.e. first another hole of tune processing again behind a hole wherein of processing, because the positioning accuracy request in process is very high, thereby unstable product quality, the low precision of resetting under combination difficulty (normal appearance suppressed dead phenomenon because of two locating hole centre-to-centre spacing errors) while free state, worst error reaches 0.1mm, and this technological process is long, efficiency is low, the occupancy of equipment is large, and production space also takies many.
Particularity due to connecting rod two locating holes, because the threaded portion of its locating hole is on bowl cover, thread Pilot hole is less than locating hole, wanting disposable comes outbreak out this stepped hole, must down bore from block upper surface, connecting rod below, because the length of connecting rod is all more than 200mm, common processing mode cannot meet the demands.
In fact multi-drill is existing equipment, and on multi-drill output shaft, drill chuck can clamping drilling bit drill to porous simultaneously, but multi-drill output shaft length is inadequate, and connecting rod blank does not have suitable positioning fixture cannot process yet.In order to improve machining accuracy, work efficiency, how to adopt multi-drill to drill the problem of Liang Kongshiwo company research.
Summary of the invention:
The object of the invention is to overcome above-mentioned defect, a kind of machine-tooled method of air-compressor connecting rod and the frock that drills and reams are provided.
The solution of the present invention is: what comprise connecting rod base substrate rough mills annulus boss plane, car microcephaly processed hole, full packet two side planes of milling, beat grade of steel, gonnecting rod body and bowl cover split cutting, threaded bowl cover screwed hole, gonnecting rod body and bowl cover are fit fixing, assembly annulus boss flat surface grinding, right boring concentric reducer hole, lining is pressed in microcephaly hole, roll extrusion concentric reducer hole, it is characterized in that: after beating grade of steel operation, connecting rod blank is arranged on and is drilled and reamed in frock, moving cooperation of microcephaly hole is inserted in the tool locating pin cylindrical that drills and reams, big end hole overlays and makes its annulus boss rear end face laminating pasting board that drills and reams in frock implement the plane laminating location that is locked with pressing plate, positioning and locking is pasted with the side top fastening bolt top, frock both sides that drills and reams respectively in full packet two sides, multi-drill two output shafts lengthen, the step drill bit that its end drill chuck is installed is respectively through after two the bore template drill bushings of frock that drill and ream, full packet being drilled to stepped hole, the full packet stepped hole of articulation upper hole, then enter gonnecting rod body and bowl cover split cutting action, multi-drill output shaft amount of elongation meets and on connecting rod blank, completes the length condition that stepped hole drills, and step drill bit upper drill bit external diameter equals connecting rod blank longitudinal hole internal diameter, and step drill bit bottom outside diameter equals connecting rod blank stepped hole bottom hole internal diameter.
The drill and ream scheme of frock of the present invention is: by bolted base plate each other, middle riser, vertical plates on both sides, two bore templates, and alignment pin, pressing plate forms, it is tabular that base plate and middle riser are inverted T-shape, vertical plates on both sides is divided subsides inverted T-shape plate two sides, bore template and cant board are inverted L-shaped shape horizontal in neutral front edge of board face, two bore templates are symmetrical, its inner face spacing is greater than connecting rod blank middle part long plate shape body width, in bore template, in side through hole, fit is fixed with Step Shaft shell-like drill bushing, two Step Shaft shell-like drill bushing axial line spacing equal connecting rod blank both sides stepped hole axial line spacing, the screwed hole axial line spacing that the stepped hole that middle riser top arranges and middle riser bottom arrange equals connecting rod blank microcephaly hole and big end hole axial line spacing, the moving engage sleeves of left side threaded column of a step-like double thread post screws up after pasting board medium pore in middle riser lower thread hole in an annulus plate-like, interior pasting board laminating is fixed on middle riser, in the threaded column of double thread post right side, moving cooperation is sheathed with and pressing plate and the pad of interior pasting board with shape, nut, interior pasting board, the external diameter of pressing plate is greater than connecting rod blank annulus boss external diameter, alignment pin cylindrical is Step Shaft shape, inner circle is stepped hole, the little axis body of alignment pin was inserted in the macropore in neutral plate upper step hole through moving cooperation after pad, a bolt is inserted in after alignment pin stepped hole macropore, and front end screw thread screws up to be implemented alignment pin and be fixedly connected with middle riser on the internal thread of middle riser upper step hole aperture, vertical plates on both sides is respectively arranged with screwed hole at middle riser lower thread hole equal altitudes, and both sides side top fastening bolt screws up respectively in vertical plates on both sides screwed hole.
The invention has the advantages that: two holes of the longitudinal stepped hole of gonnecting rod body longitudinal hole and bowl cover are disposable accurate positionings that process, two hole centre-to-centre spacing, aperture are consistent, accurate positioning.Gonnecting rod body, bowl cover faying face after milling is opened needn't be processed again, and faying face keeps original state substantially, make combination more smooth, and the refitting precision high (error is below 0.04) under free state has been optimized production technology simultaneously, has shortened technological process.
Accompanying drawing explanation:
Fig. 1 is connecting rod schematic diagram of the present invention.
Fig. 2 is the front view that connecting rod blank of the present invention is set with the frock that drills and reams.
Fig. 3 is the A-A cutaway view of Fig. 2.
The specific embodiment:
Structure of the present invention: it is characterized in that: by bolted base plate 10 each other, middle riser 5, vertical plates on both sides 8, two bore templates 6, and alignment pin 4, pressing plate 14 forms, it is tabular that base plate 10 and middle riser 5 are inverted T-shape, vertical plates on both sides is pasted inverted T-shape plate two sides for 8 minutes, bore template 6 is inverted L-shaped shape horizontal in middle riser 5 front end faces with cant board 8, two bore templates 6 are symmetrical, its inner face spacing is greater than connecting rod blank middle part long plate shape body width, in the interior side through hole of bore template 6, fit is fixed with Step Shaft shell-like drill bushing 11, two Step Shaft shell-like drill bushing 11 axial line spacing equal connecting rod blank both sides stepped hole axial line spacing, the screwed hole axial line spacing that the stepped hole that middle riser 5 tops arrange and middle riser 5 bottoms arrange equals connecting rod blank microcephaly hole 1 and big end hole 3 axial line spacing, the moving engage sleeves of left side threaded column of a step-like double thread post 13 screws up after pasting board 15 medium pores in middle riser 5 lower thread holes in an annulus plate-like, interior pasting board 15 laminatings are fixed on middle riser 5, in double thread post 13 right side threaded column, moving cooperation is sheathed with and pressing plate 14 and the pad of interior pasting board 15 with shape, nut, interior pasting board 15, the external diameter of pressing plate 14 is greater than connecting rod blank annulus boss 2 external diameters, alignment pin 4 cylindricals are Step Shaft shape, inner circle is stepped hole, the little axis body of alignment pin 4 was inserted in the macropore in neutral plate 5 upper step holes through moving cooperation after pad, a bolt is inserted in after alignment pin 4 stepped hole macropores, and front end screw thread screws up to be implemented alignment pin 4 and be fixedly connected with middle riser 5 on the internal thread of middle riser 5 upper step hole apertures, vertical plates on both sides 8 is respectively arranged with screwed hole at middle riser 5 lower thread hole equal altitudes, and both sides side top fastening bolt 9 screws up respectively in vertical plates on both sides 8 screwed holes.
Frock is arranged on multi-drill work top.During boring, first connecting rod blank microcephaly hole 1 is linked in frock on riser 5 top alignment pin 4 cylindricals, big end hole 3 is through the double thread post 13 of middle riser 5, one side annulus boss 2 end faces are fitted on the interior pasting board of frock 15 outer faces, again by pressing plate 14 medium pores, pad medium pore is inserted in double thread post 13 right side threaded column, with nut, pressing plate 14 is overlayed outside connecting rod blank on annulus boss 2, after the side top fastening bolt 9 in vertical plates on both sides 8 is turned, top is attached on the two sides of the full packet 7 of connecting rod blank respectively, connecting rod blank is located in frock, behind location, under two step drill bits of multi-drill, bore.Multi-drill output shaft amount of elongation meets and on connecting rod blank, completes the length condition that stepped hole drills.Step drill bit upper drill bit external diameter equals connecting rod blank longitudinal hole internal diameter, and step drill bit bottom outside diameter equals connecting rod blank stepped hole bottom hole internal diameter.
After two location hole drills are good, utilize another multi spindle drilling machine and the another set of frock that drills and reams just can ream to connecting rod.Again the milling of connecting rod blank is opened to split afterwards, bowl cover 17 is carried out to tapping, gonnecting rod body 16 and bowl cover 17 faying faces do not need milling and mill, as long as directly combine after the burr of its faying face of removal.
On middle riser 5, be also provided with two coolant outlets 12, during for boring, to drill bit, workpiece, supply water cooling.
Use technique of the present invention and frock processing connecting rod, simplify working process, improve machining accuracy, reduced processing cost, also can guarantee connecting rod assembly quality stability, improved production efficiency simultaneously, alleviate workman's labour intensity, the more important thing is the input amount that has reduced equipment funds.

Claims (2)

1. a machine-tooled method for air-compressor connecting rod, what comprise connecting rod base substrate rough mills annulus boss (2) plane, car microcephaly processed hole (1), full packet two side planes of milling, beat grade of steel, gonnecting rod body (16) and bowl cover (17) split cutting, threaded bowl cover screwed hole, gonnecting rod body (16) is fit fixing with bowl cover (17), assembly annulus boss (2) flat surface grinding, right boring concentric reducer hole (3, 1), lining is pressed in microcephaly hole (1), roll extrusion concentric reducer hole (3, 1), it is characterized in that: after beating grade of steel operation, connecting rod blank is arranged on and is drilled and reamed in frock, microcephaly hole (1) moving cooperation is inserted in tool locating pin (4) cylindrical that drills and reams, big end hole (3) overlays and makes its annulus boss (2) rear end face laminating pasting board (15) that drills and reams in frock implement the plane laminating location that is locked with pressing plate (14), positioning and locking is pasted with frock both sides side top fastening bolts (9) top that drills and reams respectively in full packet two sides, multi-drill two output shafts lengthen, the step drill bit that its end drill chuck is installed is respectively through after two bore templates of frock (6) drill bushings (11) that drill and ream, full packet being drilled to stepped hole, the full packet stepped hole of articulation upper hole, then enters gonnecting rod body (16) and bowl cover (17) split cutting action, multi-drill output shaft amount of elongation meets and on connecting rod blank, completes the length condition that stepped hole drills, and step drill bit upper drill bit external diameter equals connecting rod blank longitudinal hole internal diameter, and step drill bit bottom outside diameter equals connecting rod blank stepped hole bottom hole internal diameter.
2. the machined of the air-compressor connecting rod frock that drills and reams, it is characterized in that: by bolted base plate (10) each other, middle riser (5), vertical plates on both sides (8), two bore templates (6), and alignment pin (4), pressing plate (14) forms, it is tabular that base plate (10) and middle riser (5) are inverted T-shape, vertical plates on both sides (8) minute is pasted inverted T-shape plate two sides, bore template (6) is inverted L-shaped shape horizontal in middle riser (5) front end face with cant board (8), two bore templates (6) are symmetrical, its inner face spacing is greater than connecting rod blank middle part long plate shape body width, in the interior side through hole of bore template (6), fit is fixed with Step Shaft shell-like drill bushing (11), two Step Shaft shell-like drill bushings (11) axial line spacing equals connecting rod blank both sides stepped hole axial line spacing, the screwed hole axial line spacing that the stepped hole that middle riser (5) top arranges and middle riser (5) bottom arrange equals connecting rod blank microcephaly hole (1) and big end hole (3) axial line spacing, the moving engage sleeves of left side threaded column of a step-like double thread post (13) screws up after pasting board (15) medium pore in middle riser (5) lower thread hole in an annulus plate-like, interior pasting board (15) laminating is fixed on middle riser (5), in the threaded column of double thread post (13) right side, moving cooperation is sheathed with and pressing plate (14) and the pad of interior pasting board (15) with shape, nut, interior pasting board (15), the external diameter of pressing plate (14) is greater than connecting rod blank annulus boss (2) external diameter, alignment pin (4) cylindrical is Step Shaft shape, inner circle is stepped hole, the little axis body of alignment pin (4) was inserted in the macropore in neutral plate (5) upper step hole through moving cooperation after pad, a bolt is inserted in after alignment pin (4) stepped hole macropore, and front end screw thread screws up to be implemented alignment pin (4) and be fixedly connected with middle riser (5) on the internal thread of middle riser (5) upper step hole aperture, vertical plates on both sides (8) is respectively arranged with screwed hole at middle riser (5) lower thread hole equal altitudes, and both sides side top fastening bolts (9) screw up respectively in vertical plates on both sides (8) screwed hole.
CN201210231811.3A 2012-07-03 2012-07-03 Method for machining connecting rod of air compressor and drilling and hinging fixture CN102717239B (en)

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