A kind of cubing of measuring connecting rod concentric reducer drop
The utility model relates to a kind of cubing, relates in particular to a kind of cubing of measuring connecting rod concentric reducer drop.
In the production run of automobile connecting bar, connecting rod concentric reducer drop is one of important technical indicator, what connecting rod concentric reducer drop was mainly measured is the drop of connecting rod concentric reducer both ends of the surface, in production scene, need to this drop, check routinely frequently, as defective in this index, when carrying out concentric reducer hole right boring subsequently, can cause connecting rod small end hole horizontal direction and vertical direction depth of parallelism variation, when serious, can cause the form and position tolerance variation of engine piston and crank, and then affect engine piston, assembling between crank and automobile connecting bar, cause complete machine not run well.
In prior art, this index cannot directly be measured with universal check tool, and common detection method has: three-dimensional detection method, height gauge and centimeter check method.
Three-dimensional detection method, that processed good connecting rod is sent to centralab after more than 6 hours constant temperature, by getting measurement ready after three coordinate measuring machine modeling, its measuring period is long, efficiency is low, measuring equipment is also more expensive, and because each modeling gauger's measurement gimmick is different, the measurement numerical value of same connecting rod also can be different.
Height gauge and centimeter check method, the major part that is about to tested connecting rod tender is placed on the detection piece of platform and fixes with briquetting, microcephaly is unsettled, dial gauge is fixed on height gauge, measures connecting rod tender microcephaly drop, subsequently data on dial gauge is made zero, and then go to measure connecting rod sample microcephaly, read drop value, as for the measurement of another side drop, connecting rod oppositely installs and measures and just can.The method is measured inefficiency, and measuring error is large.
Utility model content
The purpose of this utility model is to provide a kind of cubing of measuring connecting rod concentric reducer drop, the defect that when it has overcome traditional cubing detection connecting rod concentric reducer drop, measuring period is long, efficiency is low, error is large, assurance connecting rod concentric reducer drop can be measured by accurate and fast ground velocity, and can meet Repeatability and Reproducibility requirement, and easy to operate, reliable results.
For reaching this object, the utility model by the following technical solutions:
A cubing of measuring connecting rod concentric reducer drop, comprising: be arranged on locating device, clamp device and pick-up unit on cubing seat; Described locating device comprises for limiting the major part mandrel of big end end endface position and limiting the location pin that described connecting rod rotates around major part mandrel; Described clamp device is arranged on big end end, for described big end end is clamped in to described major part mandrel; Described pick-up unit is arranged on small end of connecting rod end for detection of the drop data of small end of connecting rod end end face and stub end end face.
Cubing is adjusted behind detection position by standard connecting rod, connecting rod to be detected is fixedly made the end face of its one end in certain horizontal level, by pick-up unit, detect the difference between connecting rod other end position and standard component, and then whether the drop detecting between connecting rod concentric reducer meets the requirements.
As a kind of preferred technical scheme, described pick-up unit comprises table bearing, dial gauge, lever measuring mechanism and driving member, described dial gauge is arranged on one end of described driving member, described lever measuring mechanism is arranged on the driving member other end, on described table bearing, have mounting groove, described driving member is arranged on described table bearing by described mounting groove.
In lever measuring mechanism, there is reversing transmission mechanism, the change in location of vertical direction can be changed into the change in location of horizontal direction, pass to driving member, then pass to dial gauge by driving member, thereby on dial gauge, read drop numerical value.
As a kind of preferred technical scheme, described driving member comprises the drive link being connected with dial gauge and the extension bar being connected with described lever measuring mechanism, between described drive link and extension bar, by spring, is connected.
As a kind of preferred technical scheme, described table bearing is by adjustable being arranged on described cubing seat in waist-shaped hole position.
In actual production, need the connecting rod model difference detecting, have the situation that connecting rod centre distance is different and occur, table bearing is provided with along the length direction of connecting rod adjustable, can make pick-up unit be applicable to the detection of different centre distance connecting rods, improve the versatility of pick-up unit.
As a kind of preferred technical scheme, described major part mandrel comprises the limit shaft matching with the hole of big end end, and limited block, described limited block has the confined planes matching with big end end end face, on the confined planes that is arranged on described limited block that described limit shaft is vertical.
As a kind of preferred technical scheme, described limit shaft and limited block are structure as a whole, and described major part mandrel is arranged on described cubing seat by limited block is dismountable.
Major part mandrel matches with the hole of big end end, and when detecting different connecting rods, the diameter in hole can be different, and therefore dismountable major part mandrel is set can realize the location to different model connecting rod.
As a kind of preferred technical scheme, described clamp device comprises pressing plate and cylinder, and described cylinder is fixedly mounted on cubing seat, and described pressing plate has and connects the first end of described cylinder piston rod output terminal and for clamping the second end of described big end end.
Pressing plate first end is by the dismountable piston rod output terminal that is arranged on cylinder of hex bolts, and makes pressing plate vertical with piston rod axis with length direction.
As a kind of preferred technical scheme, between described pressing plate first end and the second end, be provided with pilot hole, position corresponding with described pilot hole on described cubing seat is installed with the register pin coordinating with described pilot hole.
It is to rotate at clamping process center platen in order to prevent that pilot hole and register pin are set, thereby cannot compress connecting rod.
As a kind of preferred technical scheme, described pressing plate the second end is provided with padded coaming with the surface that described big end end contacts.
Described padded coaming preferably copper, it is good that it has wearing quality, and for metal material can be welded on pressing plate the second end easily, and its material softlyer can cushion to some extent when compressing connecting rod simultaneously, pressure is steadily difficult for scratch rod surface.
In addition, described padded coaming is not limited to copper, and the suitable material that other those skilled in the art easily expect all can be used as padded coaming and uses.
As a kind of preferred technical scheme, described location pin and being arranged between major part mandrel and pick-up unit that described major part mandrel axis parallels.
Described location pin is at least one, rotates, and pick-up unit cannot be detected surveying small end of connecting rod end centered by limiting location pin one major part mandrel.
Contrast prior art, the beneficial effects of the utility model are: a kind of cubing of measuring connecting rod concentric reducer drop is provided, have simple in structure, easy to operate, the feature of cubing highly versatile, can realize the detection to different model connecting rod, can reduce the wearing and tearing to connecting rod, reduce measuring period, improved measurement efficiency, and reduced measuring error.
Accompanying drawing explanation
According to drawings and embodiments the utility model is described in further detail below.
Fig. 1 is a kind of cubing structural representation that detects connecting rod concentric reducer drop described in the present embodiment;
Fig. 2 is the schematic top plan view of Fig. 1;
Fig. 3 is major part mandrel perspective view;
Fig. 4 is table bearing perspective view;
Fig. 5 is press plate mechanism cut-open view;
In Fig. 1 to 5:
1, cubing seat; 2, table bearing; 3, dial gauge; 4, drive link; 5, spring; 6, extension bar; 7, mounting hole; 8, lever measuring mechanism; 9, location pin; 10, limit shaft; 11, limited block; 12, cylinder; 13, pressing plate; 14, pilot hole; 15, register pin; 16, connecting rod; 17, waist-shaped hole; 18, copper packing.
Below in conjunction with accompanying drawing and by embodiment, further illustrate the technical solution of the utility model.
As shown in Figures 1 to 5, a kind of cubing that detects connecting rod concentric reducer drop described in the present embodiment, comprises cubing seat 1, is disposed with pick-up unit, locating device and clamp device on cubing seat 1.
Pick-up unit comprises table bearing 2, show on bearing 2 by adjustable being arranged on cubing seat 1 in waist-shaped hole 17 positions, offering for the mounting hole 7 of driving member is installed of table bearing 2 inner horizontal, install in 7 drive link 4, spring 5 and extension bar 6 are installed successively, drive link 4 stretches out one end of mounting hole 7, on it, be connected with dial gauge 3, extension bar 6 stretches out mounting hole 7 other ends and is connected with lever measuring mechanism 8.
Locating device comprises the location pin 9 being vertically arranged on cubing seat 1, and dismountable major part mandrel being arranged on cubing seat 1, major part mandrel is comprised of the limit shaft 10 connecting as one and limited block 11, limited block 11 is dismountable to be arranged on cubing seat 1, the confined planes of its upper surface for matching with connecting rod 16 stub end end faces, the center that is arranged on confined planes that limit shaft 10 is vertical.Location pin 9 can prevent that connecting rod 16 is rotated around major part mandrel, the level height that major part mandrel has limited connecting rod 16 with and displacement in the horizontal direction.
Clamp device comprises and is fixedly mounted on the cylinder 12 that cubing seat 1 upper piston rod arranges upward and is bolted the pressing plate 13 that is arranged on piston rod output terminal.Pressing plate 13 first ends connect piston rod output terminal, the second end lower surface is provided with copper packing 18 for clamping the stub end of connecting rod 16, on pressing plate 13 between first end and the second end, be provided with pilot hole 14, position corresponding with described pilot hole 14 on cubing seat 1 is provided with register pin 15.
In testing process, first the borehole jack on the stub end of standard connecting rod is located on limit shaft 10, and make its lower surface realize face with the confined planes on limited block 11 to contact, the microcephaly of connecting rod 16 is held and rotated to lever measuring mechanism 8 tops, starting cylinder 12 band dynamic pressure plates 13 moves downward connecting rod 16 stub ends is pressed on limited block 11, in location pin 9 and the position of the acting in conjunction lower link 16 of major part mandrel, be fixed, its little head end is fixing is positioned at lever measuring mechanism 8 tops, lever measuring mechanism 8 contacts with connecting rod 16, the extruding that is subject to connecting rod 16 deforms, the change in location that lever measuring mechanism 8 is converted into horizontal direction by the change in location of vertical direction passes to extension bar 6, extension bar 6 passes to drive link 4 by spring 5 again, drive link 4 drives dial gauge 3 to rotate, on dial plate, there is reading, now by dial gauge 3 zeroings, just completed the preconditioning of pick-up unit.
Starting cylinder 12 takes off standard connecting rod, adopt the method identical with installation code connecting rod that connecting rod to be detected is installed, after installation, because not coexisting on dial gauge, the concentric reducer drop of connecting rod to be detected and standard connecting rod can not produce a new reading, this reading is the deviation of connecting rod to be detected, can judge whether the concentric reducer drop of connecting rod to be detected meets the requirements by this numerical value.
What need statement is; above-mentioned embodiment is only for preferred embodiment of the present utility model and application technology are wanted principle; in technical scope disclosed in the utility model; the variation that any those skilled in the art of being familiar with easily expect or replacement, all should be encompassed in protection domain of the present utility model.