CN103743320A - Device and method for detecting distance from engine body inclined transmission face to engine body bottom face - Google Patents
Device and method for detecting distance from engine body inclined transmission face to engine body bottom face Download PDFInfo
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- CN103743320A CN103743320A CN201310666293.2A CN201310666293A CN103743320A CN 103743320 A CN103743320 A CN 103743320A CN 201310666293 A CN201310666293 A CN 201310666293A CN 103743320 A CN103743320 A CN 103743320A
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Abstract
The invention discloses a device and method for detecting the distance from an engine body inclined transmission face to an engine body bottom face. The detection device is characterized in that a gauge baseplate is provided with a gauge body; a support plate is fixedly arranged to the gauge body inclined face through bolts; and a depth vernier caliper is inserted into a hole in the support plate so as to measure the machining face. The gauge baseplate is provided with three coarse limitation pins, wherein the left ends of the front-end two coarse limitation pins are respectively provided with a cylinder positioning pin and a positioning support block. The engine body is arranged in the place limited by the three coarse limitation pins; the left end of the engine body is arranged in the cylinder positioning pin; and the right end of the engine body is positioned on the upper end surface of the positioning support block. The detection method comprises the following two steps: designing reference calculation of coordinate dimension; and carrying out conversion of the coordinate system dimension and detection coordinate system dimension. Therefore, whether the machining dimension meets process requirements can be judged; dimension of the engine body inclined transmission upper face unable to be detected can be detected online; and during the engine body processing process , the dimension can be timely and effectively controlled, and thus engine body processing quality can be guaranteed.
Description
Technical field
The invention belongs to engine component detection technique, be specifically related to pick-up unit and the method for the oblique driving face of a kind of engine body to body bottom surface distance.
Background technology
The oblique driving hole of engine body arranges for assembling oblique transmission gear and spline housing, and spiral gear engages with engine cam shaft gear, and connects driving machine operation of oil pump by oblique drive splines cover.Lubricating oil pump is very important device in engine, bears whole engine all parts lubricated and cooling.Therefore the oblique driving face of body is extremely important to the sizing of body technique pin-and-hole, if control badly, cam shaft gear is with tiltedly the meshing point of transmission gear can off-design position.If the excesssive gap of gear train or very few, there will be following several failure mode: gear pair premature wear; During engine running, gear gearing noise is large; Spline housing assembling size is interfered, lubricating oil pump cisco unity malfunction etc.Tiltedly the angle of transmission (face) center and body is guaranteed by lathe, and tiltedly the size of driving face is machined by building-block machine feeding, but the oblique driving face of body to the size of technique pin-and-hole cannot direct-detection in reality processing.In production, quality control detects by three-dimensional, most critical be to realize online detection, if but can not control in time process quality, be easy to cause in batches waste product.
The present invention is by the conversion of technological design benchmark and detection reference, by the size that cannot measure in producing, through plane geometry and dimensional chain for assembly, calculate, the dimensional parameters of design is scaled to the size that can directly measure, so carry out quality control, the oblique driving face of body to technique pin-and-hole size cannot direct-detection problem be satisfactorily resolved.
Summary of the invention
The object of the invention is, pick-up unit and the method for the oblique driving face of a kind of engine body to body bottom surface distance are provided, the technological design size conversion that cannot directly measure, for measuring online, meets requirement on machining accuracy with this.
The present invention is comprised of pick-up unit and detection method two parts, is: the right-hand member of cubing base plate is provided with cubing body, and inclined-plane, cubing body upper end is consistent with the oblique driving face of engine body angle of inclination for realizing the technical scheme that the object of the invention adopts.Back up pad is fixed with bolt and cubing body inclined-plane, in the hole that vernier depth gauge insertion back up pad has.Cubing base plate is provided with three thick spacer pins, and three thick spacer pin distributions triangular in shape are respectively equipped with cylindrical positioning pins and positioning supports is fast at the left end of two thick spacer pins of front end.Engine body is placed in the position of three coarse positioning pins restrictions, and the left end of body falls into cylindrical positioning pins, and the right-hand member of body is placed in the upper surface of positioning support bracer.
Utilize the oblique driving face of engine body to the detection method that the pick-up unit of body bottom surface distance adopts, comprise the following steps:
(1) benchmark of design coordinate dimension:
L1 is the vertical range of pin-and-hole center to oblique driving hole center line, and L2 is the extremely tiltedly distance of transmission upper surface of subpoint of pin-and-hole central vertical distance, and a is the angle between oblique driving hole center line and camshaft hole center line.L1, L2 and angle a are design parameter, and the right-angle triangle consisting of L1, L2 is tried to achieve the angle b between length L and L and the L2 of hypotenuse.L3 is the distance of oblique driving hole face center to body bottom surface, and L4 is the vertical range of oblique driving hole face to pin-and-hole center.In the triangle being comprised of the angle c between L, L3, L4 and L and L3, angle c can be tried to achieve by angle a+b, and hypotenuse L is known, can try to achieve thus L3, L4.
(2) carry out the conversion that coordinate system size and detection coordinates are size:
The L5 given cylindrical positioning pins and the centre distance size of cubing body of when design of serving as reasons, while serving as reasons design, given cubing body pin-and-hole is to the distance of cubing body left side for L6, and L7 is the distance of support plate face bottom surface to oblique driving face.Cubing body inclined-plane peak to the distance of positioning support bracer equates with the L3 of step (1), but need be L7 by L3 size conversion.L8=L5-L4-L6, in the right-angle triangle of L7, L8 and angle a composition, by L8 and angle a, can try to achieve L7.
The oblique driving face of engine body is arranged in the downside of pick-up unit support plate parallel with back up pad.Adopting vernier depth gauge to record the distance of oblique driving face to back up pad is L9, and L9 equals the thickness that L7 adds upper bearing plate.Detect the size of L9 qualified in given scope, can assert that the size of L3, L4 conversion is qualified, confirm that thus L1, L2 design size are qualified.
Feature of the present invention and beneficial effect are: by process, be converted into detection size, the process that cannot record is changed by a series of benchmark and the calculating of dimensional chain for assembly, can directly record conversion size, just can judge accordingly whether processing dimension meets technological requirement.Above the oblique transmission of body that makes to detect, size realizes online detection, and in machining process, this size obtains in time, effectively controls, and with this, can guarantee machining cylinder block quality.The present invention is applied to the online detection of 4102 serial diesel engine body transfer matics, confirms that detection efficiency is high, easy to use.
Accompanying drawing explanation
Fig. 1 is engine body technological design size schematic diagram.
Fig. 2 is the enforcement illustration that the present invention applies.
Fig. 3 is check point process example enlarged drawing in Fig. 2.
Embodiment
Below in conjunction with accompanying drawing and by specific embodiment, theory structure of the present invention and method are described further.
The oblique driving face of engine body, to the pick-up unit of body bottom surface distance, has cubing base plate, cubing body, support plate, bolt, vernier depth gauge, thick spacer pin, cylindrical positioning pins and supporting block for location etc.Its composition structure is: the right-hand member of cubing base plate 1 is provided with cubing body 2, and inclined-plane, cubing body upper end is consistent with the oblique driving face of engine body angle of inclination.Back up pad 3 use bolts 4 are fixed with cubing body inclined-plane, and vernier depth gauge 5 inserts in the hole that back up pad has.Cubing base plate is provided with 6, three thick spacer pin distributions triangular in shape of three thick spacer pins, at the left end of two thick spacer pins of front end, is respectively equipped with cylindrical positioning pins 7 and positioning supports fast 8.Engine body is placed in the position of three coarse positioning pins restrictions, and the left end of body falls into cylindrical positioning pins, and the right-hand member of body is placed in the upper surface (as Fig. 2) of positioning support bracer.
The detection method of utilizing above-mentioned detection device to adopt, comprises the following steps:
(1) benchmark of design coordinate dimension:
L1 is the vertical range of pin-and-hole center to oblique driving hole center line, and L2 is the extremely tiltedly distance of transmission upper surface of subpoint of pin-and-hole central vertical distance, and a is the angle between oblique driving hole center line and camshaft hole center line.L1, L2 and angle a are design parameter, and the right-angle triangle consisting of L1, L2 is tried to achieve the angle b between length L and L and the L2 of hypotenuse.L3 is the distance of oblique driving hole face center to body bottom surface, and L4 is the vertical range (on Fig. 2 show as cylindrical positioning pins center centre distance to vernier depth gauge measuring point projection) of oblique driving hole face to pin-and-hole center.In the triangle being comprised of the angle c between L, L3, L4 and L and L3, angle c can be tried to achieve by angle a+b, and hypotenuse L is known, can try to achieve thus L3, L4(as Fig. 1).
By calculating, obtain L3, L4 size, in reality processing, cannot detect, therefore also need to convert, need to be by the L3 of body, L4 size coordinate system is converted to detection coordinates system (as Fig. 2) and converts.
(2) carry out the conversion that coordinate system size and detection coordinates are size:
The L5 given cylindrical positioning pins and the centre distance size of cubing body of when design of serving as reasons, while serving as reasons design, given cubing body pin-and-hole is to the distance of cubing body left side for L6, and L7 is the distance of support plate face bottom surface to oblique driving face.Cubing body inclined-plane peak to the distance of positioning support bracer equates with the L3 of step (1), but need be L7 by L3 size conversion.L8=L5-L4-L6, in the right-angle triangle of L7, L8 and angle a composition, by L8 and angle a, can try to achieve L7.
The oblique driving face of engine body is positioned at the downside of support plate parallel with back up pad.Adopting vernier depth gauge to record the distance of oblique driving face to back up pad is that L9(is as Fig. 2, Fig. 3), L9 equals the thickness that L7 adds upper bearing plate.Detect the size of L9 qualified in given scope, can assert that the size of L3, L4 conversion is qualified, confirm that thus L1, L2 design size are qualified.
The process that the oblique driving face operation of milling machine processing engine body requires is that L1, L2 and angle a(are shown in Fig. 1).A angle guarantees by lathe, and L1, L2 are the standard size of design, after processing, cannot detect, and the crudy that wants to control this operation must detect the process that adds man-hour, could adjust assurance process dimension to lathe.This pick-up unit and detection method, the calculating the size of design through benchmark conversion and plane analytic geometry, the size that acquisition can be measured.
By L1, L2, angle a, through plane geometry, calculate, obtain L3, L4 size, obtain body dowel hole center line to the X of oblique driving hole center line, the distance of Y.And the size of L3 is inclined-plane, arrive the distance of plane, want direct measurement also cannot realize, therefore also will change and the calculating of plane geometry just can obtain by benchmark.In the be controlled at ± 0.02mm of L3 dimensional tolerence of cubing body, for convenient, calculate, cubing body reference field is designed to and the consistent size of body L3 to the distance of cubing bottom surface, at this moment L7 just can get according to L8 and angle a calculating, the thickness of L7 and support plate 3 is exactly that vernier depth gauge records L9 size, by above calculating L9, be exactly L1 and the synthetic size of L2 requiring in manufacturing procedure figure, if L9 size is qualified, L1, L2 size are just qualified.
The location of engine body adopts three coarse positioning pins, cylindrical positioning pins and positioning support bracer location, consistent with the technological datum of machining cylinder block, and guarantees that body body latch when hanging in pick-up unit is smooth, does not collide locating device, guarantees the precision detecting.The thickness deviation of support plate is controlled at ± and 0.01, at this moment support plate with above the oblique transmission of body, be parallel, on support plate, open a hole, vernier depth gauge is inserted in hole, on contacting above oblique transmission, now the reading of vernier depth gauge is exactly the size that will obtain, and detects that size is in L9 ± 0.12 scope, just illustrates that the process of this operation is qualified.
Testing process: the oblique driving face process of 4102 series diesel body is carried out to process dimension detection, body is hung in cubing, first three thick spacer pins carry out coarse position centering to body, then body is placed on locating support plate slowly, now will in the pin-and-hole of other register pin insertion body, position.Then above contacting the oblique transmission of body with vernier depth gauge, measure.
Claims (2)
1. the oblique driving face of engine body is to the pick-up unit of body bottom surface distance, there is cubing base plate, cubing body, support plate, bolt, vernier depth gauge, thick spacer pin, cylindrical positioning pins and supporting block for location, it is characterized in that: the right-hand member of cubing base plate (1) is provided with cubing body (2), inclined-plane, cubing body upper end is consistent with the oblique driving face of engine body angle of inclination, back up pad (3) is fixed with bolt (4) and cubing body inclined-plane, in the hole that vernier depth gauge (5) insertion back up pad has, cubing base plate is provided with three thick spacer pins (6), three thick spacer pin distributions triangular in shape, at the left end of two thick spacer pins of front end, be respectively equipped with cylindrical positioning pins (7) and positioning supports fast (8), engine body is placed in the position of three coarse positioning pins restrictions, the left end of body falls into cylindrical positioning pins, the right-hand member of body is placed in the upper surface of positioning support bracer.
2. utilize the oblique driving face of engine body described in claim 1 to the detection method that the pick-up unit of body bottom surface distance adopts, to it is characterized in that described detection method comprises the following steps:
(1) benchmark of design coordinate dimension:
L1 is the vertical range of pin-and-hole center to oblique driving hole center line, L2 is that the subpoint of pin-and-hole central vertical distance is to the distance of oblique transmission upper surface, a is the angle between oblique driving hole center line and camshaft hole center line, L1, L2, and angle a is design parameter, by L1, the right-angle triangle that L2 forms, try to achieve the angle b between length L and L and the L2 of hypotenuse, L3 is the distance of oblique driving hole face center to body bottom surface, L4 is oblique driving hole face to the vertical range at pin-and-hole center by L, L3, in the triangle of the angle c composition between L4 and L and L3, angle c can be tried to achieve by angle a+b, hypotenuse L is known, can try to achieve thus L3, L4,
(2) carry out the conversion that coordinate system size and detection coordinates are size:
L5 when design given cylindrical positioning pins and the centre distance size of cubing body of serving as reasons, L6 serves as reasons when design given cubing body pin-and-hole to the distance of cubing body left side, L7 is the distance of support plate face bottom surface to oblique driving face, cubing body inclined-plane peak to the distance of positioning support bracer equates with the L3 of step (1), but need be L7 by L3 size conversion, L8=L5-L4-L6, in the right-angle triangle of L7, L8 and angle a composition, by L8 and angle a, can try to achieve L7;
The oblique driving face of engine body is positioned at the downside of support plate (3) as claimed in claim 1 parallel with back up pad, adopting vernier depth gauge (5) to record the distance of oblique driving face to back up pad is L9, be that L9 equals the thickness that L7 adds upper bearing plate, the size that detects L9 is qualified in given scope, the size that can assert L3, L4 conversion is qualified, confirms that thus L1, L2 design size are qualified.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105300250A (en) * | 2015-11-24 | 2016-02-03 | 重庆渝记涵诚机械制造有限公司 | Cylinder cover inclined plane processing depth detecting tool |
| CN105328512A (en) * | 2015-10-20 | 2016-02-17 | 北汽福田汽车股份有限公司 | Online detection method for oblique guide sliding face of oblique wedge sliding block |
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| CN103115546A (en) * | 2012-10-19 | 2013-05-22 | 浙江吉利汽车研究院有限公司杭州分公司 | Engine cooling inclined hole detection tool and detection method based on the same |
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Patent Citations (5)
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| JPH11183425A (en) * | 1997-12-19 | 1999-07-09 | Denso Corp | Oxygen concentration detector |
| CN102661695A (en) * | 2012-05-10 | 2012-09-12 | 芜湖永裕汽车工业有限公司 | Device and method for detecting positions of threaded holes on top surface of engine cylinder head |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105328512A (en) * | 2015-10-20 | 2016-02-17 | 北汽福田汽车股份有限公司 | Online detection method for oblique guide sliding face of oblique wedge sliding block |
| CN105328512B (en) * | 2015-10-20 | 2017-08-04 | 北汽福田汽车股份有限公司 | A kind of online test method in the oblique slide guide face of wedge slide block |
| CN105300250A (en) * | 2015-11-24 | 2016-02-03 | 重庆渝记涵诚机械制造有限公司 | Cylinder cover inclined plane processing depth detecting tool |
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Application publication date: 20140423 |