CN203357031U

CN203357031U - Crankshaft automatic centering milling process face fixture

Info

Publication number: CN203357031U
Application number: CN 201320359583
Authority: CN
Inventors: 仇树波; 李坤; 李桂兰; 张伟杰; 张艳丽; 马文超
Original assignee: LIAONING 518 INTERNAL-COMBUSTION ENGINE FITTINGS Co Ltd
Current assignee: LIAONING 518 INTERNAL-COMBUSTION ENGINE FITTINGS Co Ltd
Priority date: 2013-06-23
Filing date: 2013-06-23
Publication date: 2013-12-25
Anticipated expiration: 2023-06-23

Abstract

The utility model provides a crankshaft automatic centering milling process face fixture. The crankshaft automatic centering milling process face fixture is composed of a base plate (1), a crankshaft pin centering clamp (2), two main journal V-shaped iron supports (3) and a crank arm positioning block (4), wherein the crankshaft pin centering clamp (2), the main journal V-shaped iron supports (3) and the crank arm positioning block (4) are fixedly arranged on the base plate (1), and the crankshaft pin centering clamp (2) is composed of a pair of clamping plates (2a, 2b) which are driven through drive bolts. When the crankshaft automatic centering milling process face fixture is used, two main journals of a crankshaft are placed on the left main journal V-shaped iron support (3) and the right main journal V-shaped iron support (3) respectively, one side of a crank arm is attached to the crank arm positioning block (4), then, a crankshaft pin is clamped through the crankshaft pin centering clamp (2) so that the crankshaft can be fixed, and finally the outer side face of the crank arm is machined through a milling machine to form a process face of the crankshaft. According to the crankshaft automatic centering milling process face fixture, a measurement datum plane and a machining datum plane can be unified, the machining accuracy of the crankshaft is improved, and the crankshaft automatic centering milling process face fixture is easy to operate and high in machining efficiency.

Description

The technical face fixture is milled in a kind of bent axle self-centering

Technical field

The utility model relates to the crankshaft milling technical face and add the self-centering of using man-hour fixture.

Background technology

The basis when technical face of bent axle is Crankshaft Machining, its machining accuracy has very large impact to the bent axle following process, and its precision has directly determined the crank arm precision of both sides width of finished product bent axle, affects size and the Technology for Heating Processing of Crankshaft Machining blank allowance simultaneously.

Bent axle technical face processing at present is mainly line processing, mark the technical face graticule of the both sides of cranking arm on cranking arm by platform, then bent axle is placed on milling machine, first milling one side technical face, then the bent axle milling opposite side technical face of overturning, mainly there is following problem in this processing: the 1st, low precision, line processing just determines its precision, line itself just has error, adds live width itself just wide at 0.2-0.3mm, and naked eyes align milling and cause machining accuracy to depart from generally at 0.5-1mm simultaneously.This processing method poor consistency, affected by journal size very large, can not make measurement datum and processing datum unified, affect the calibration dimensional accuracy of each rod journal, cause indivedual rod journal surface cut processing undesirable, there is the casting skin residual phenomena on surface.The 2nd, efficiency is low, and in general the line of wanting centering to draw during milling once is difficult to aim at, and at least 2 millings, working (machining) efficiency is low.

the novel content of practicality

The utility model, for the problem of prior art, provides a kind of bent axle self-centering to mill the technical face fixture, to improve the precision of milling process face, enhances productivity simultaneously.

The utility model is by base plate 1, be fixedly mounted on the crank-pin centralizer 2 on base plate 1, two trunnion V shape iron supports 3, the locating piece 4 of cranking arm forms, the corresponding crank-pin centralizer 2 of difference on base plate 1, two trunnion V shape iron supports 3, the locating piece 4 of cranking arm offers for the fixing T-shaped slotted eye 5 used of bolt, crank-pin centralizer 2 is by a pair of front and back sliding clamp 2a, 2b, drive screw 2c, drive screw limit base 2d, chute cover 2e, drive screw handle 2f forms, chute cover 2e is mounted by means of bolts on base plate 1, front and back sliding clamp 2a, 2b is slidably installed in chute cover 2e, front and rear part Wei positive and reverse return to drive screw 2c and front and back sliding clamp 2a, screw on 2b is connected, screw limiting seat 2d on the middle part of drive screw 2c is provided with locating ring 2c ' and is fixedly mounted on base plate 1 coordinates, drive screw 2c is carried out to axial location, sliding clamp 2a before and after rotary drive screw handle 2f drives, the 2b folding, trunnion V shape iron support 3 is mounted by means of bolts on base plate 1, have V-arrangement in trunnion V shape iron support 3 upper ends and prop up a mouthful 3a, be provided with the V shape iron clamp mechanism formed by double-screw bolt 3b, push rod 3e, spring 3d, pressing plate 3c on V shape iron support 3 upper surfaces, trunnion be clamped in to V and prop up on mouthful 3a, the locating piece 4 of cranking arm is bolted and is fixedly mounted on base plate 1.

The utility model is simple in structure, easily manufactured, during use, the trunnion of the close left and right sides of bent axle is placed in respectively on left and right trunnion V shape iron support 3, turning crankshaft abuts on the locating piece 4 of cranking arm the side of cranking arm of preprocessing, then by crank-pin centralizer 2, crank-pin is clamped, bent axle is fixed, then locked the V shape iron clamp mechanism on V shape iron support 3, the lateral surface of cranking arm with milling machine processing afterwards is the technical face m of bent axle.

The utility model is unified measurement datum and processing datum, has improved machining accuracy and the Crankshaft Machining precision of technical face, has avoided the impact of axle journal thickness on location simultaneously, and fixture operation is simple, has improved working (machining) efficiency.

The accompanying drawing explanation

Fig. 1-6th, the utility model example structure schematic diagram, wherein Fig. 1 is front view, and Fig. 2 is the top view of Fig. 1, and Fig. 3 is the A-A cutaway view of Fig. 1, and Fig. 4 is the D-D cutaway view of Fig. 2, and Fig. 5 is the B-B cutaway view of Fig. 1, and Fig. 6 is the C-C cutaway view of Fig. 1.

Fig. 7-8th, the utility model behaviour in service reference diagram, middle Fig. 7 is front view, Fig. 8 is the E-E cutaway view of Fig. 7.

The specific embodiment

The utility model is by base plate 1, be fixedly mounted on the crank-pin centralizer 2 on base plate 1, two trunnion V shape iron supports 3, the locating piece 4 of cranking arm forms, corresponding crank-pin centralizer 2 on base plate 1, two trunnion V shape iron supports 3, the locating piece 4 of cranking arm offers respectively for the fixing T-shaped slotted eye 5 used of bolt, crank-pin centralizer 2 is by a pair of front and back sliding clamp 2a, 2b, drive screw 2c, drive screw limit base 2d, chute cover 2e, drive screw handle 2f forms, chute cover 2e is fixedly mounted on base plate 1 with bolt by the connecting plate 2e ' of its left and right sides, front and back sliding clamp 2a, 2b is slidably installed in chute cover 2e, front and rear part Wei positive and reverse return to drive screw 2c and front and back sliding clamp 2a, screw on 2b is connected, screw limiting seat 2d on the middle part of drive screw 2c is provided with locating ring 2c ' and is fixedly mounted on base plate 1 coordinates, drive screw 2c is carried out to axial location, shown in accompanying drawing 3 embodiment, the locating ring 2c ' at the middle part of corresponding drive screw 2c, offer a limit base 2d mounting groove in chute cover 2e bottom, limit base 2d and base plate 1 use bolt are fixed, rotary drive screw handle 2f, sliding clamp 2a before and after drive screw 2c drives, the 2b folding, trunnion V shape iron support 3 is fixedly mounted on base plate 1 with bolt by the connecting plate 3 ' of its left and right sides, have V-arrangement in trunnion V shape iron support 3 upper ends and prop up a mouthful 3a, be provided with the V shape iron clamp mechanism formed by double-screw bolt 3b, push rod 3e, spring 3d, pressing plate 3c on V shape iron support 3 upper surfaces, trunnion be clamped in to V and prop up on mouthful 3a, the connecting plate 4 ' of locating piece 4 by its left and right sides of cranking arm fixedly is fixedly mounted on base plate 1 with bolt.

Claims

1.. the technical face fixture is milled in a bent axle self-centering, it is characterized in that, by base plate (1), be fixedly mounted on the crank-pin centralizer (2) on base plate (1), two trunnion V shape iron supports (3), the locating piece (4) of cranking arm forms, at the upper corresponding crank-pin centralizer (2) respectively of base plate (1), two trunnion V shape iron supports (3), the locating piece (4) of cranking arm offers for the fixing T-shaped slotted eye (5) used of bolt, and crank-pin centralizer (2) is by a pair of front and back sliding clamp (2a, 2b), drive screw (2c), drive screw limit base (2d), chute cover (2e), drive screw handle (2f) forms, and it is upper that chute cover (2e) is mounted by means of bolts on base plate (1), front and back sliding clamp (2a, 2b) be slidably installed in chute cover (2e), front and rear part Wei positive and reverse return to drive screw (2c) and front and back sliding clamp (2a, screw 2b) is connected, be provided with locating ring (2c ') coordinates with the screw limiting seat (2d) on being fixedly mounted on base plate (1) at the middle part of drive screw (2c), drive screw (2c) is carried out to axial location, sliding clamp (2a before and after rotary drive screw handle (2f) drives, 2b) folding, trunnion V shape iron support (3) is mounted by means of bolts on base plate (1), have V-arrangement in trunnion V shape iron support (3) upper end and prop up mouthful (3a), be provided with the V shape iron clamp mechanism formed by double-screw bolt (3b), push rod (3e), spring (3d), pressing plate (3c) on V shape iron support (3) upper surface, trunnion be clamped in to V and prop up on mouthful (3a), the locating piece (4) of cranking arm is bolted and is fixedly mounted on base plate (1).