CN105081973A - Tool for detecting crank radius of crankshaft and measuring method used by tool - Google Patents
Tool for detecting crank radius of crankshaft and measuring method used by tool Download PDFInfo
- Publication number
- CN105081973A CN105081973A CN201410189892.4A CN201410189892A CN105081973A CN 105081973 A CN105081973 A CN 105081973A CN 201410189892 A CN201410189892 A CN 201410189892A CN 105081973 A CN105081973 A CN 105081973A
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- crankshaft
- throw
- bent axle
- crank
- checkout gear
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- Grinding Of Cylindrical And Plane Surfaces (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses various devices for detecting the crank radius of a crankshaft during a crankshaft production process. A device comprises a crankshaft single crank, a placing frame and a detecting device. By adopting the detecting device, a measuring device is small and ingenious and is not limited by the space of a machine tool; in addition, by using the device and related trigonometric function calculation, online detection can also be carried out on the crank radius of the crankshaft during a machining process, and scrapping caused by overproof crank radius of the crankshaft can be avoided. A using principle and method of the device comprise the steps of firstly, taking the crankshaft single crank as the standard, and carrying out meter pressing and meter checking on the crankshaft single crank by using the detecting device; secondly, putting the detecting device on the crankshaft to measure the size of the crank radius, putting a base on a main shaft neck of the crankshaft, enabling the head part of a dial indicator to be in contact with a connecting rod neck, and reading the number displayed on the dial indicator; finally, carrying out numerical calculation on the size of the crank radius, and obtaining a needed detecting result.
Description
technical field
The present invention relates to the detection of throw of crankshaft in various Production of Crankshaft process.
background technology
The method of general measure throw of crank shaft adopts V-type support to support bent axle, uses the peak of height gauge centering main bearing journal side bus, Up Highway UHW and connecting rod neck; Then use outside micrometer to measure trunnion and connecting rod neck excircle dimension to re-use the difference that height gauge measures between main bearing journal peak and connecting rod neck peak and finally calculate throw of crankshaft, need the peak finding connecting rod neck cylindrical in this process, operate cumbersome.In addition, general measuring method be generally crankshaft grinding complete after carry out in detection platform, and in Crankshaft Machining process, the detection of throw of crankshaft size and modifying factor lathe space constraint cannot be carried out substantially.Invention solves above-mentioned two large drawbacks, measurement mechanism is small and exquisite, not by lathe space constraint; In addition, use apparatus of the present invention and relevant trigonometric function to calculate, in process, can also carry out on-line checkingi to the throw of crankshaft of bent axle, that avoids bent axle to cause because throw of crankshaft is overproof scraps.
summary of the invention
The present invention for the device that detects throw of crank shaft by: bent axle list turns (1), rack (2), checkout gear (3) forms, and refers to accompanying drawing 1.Wherein bent axle list turns is make according to the trunnion of bent axle to be detected and connecting rod neck excircle dimension, and size L is the throw of crankshaft of bent axle; Rack turns for placement and fixed crankshaft list; Checkout gear being equipped with dial gauge or amesdial, during for measuring throw of crankshaft, reading registration; Below checkout gear, base is housed, angle is 120 °, plays the effect of location in measuring process, refers to accompanying drawing 2.The use principle of apparatus of the present invention and method: first turn as reference-calibrating with bent axle list, to turn at bent axle list according to mode shown in accompanying drawing 1 by checkout gear and carry out pressure table and his-and-hers watches; Then checkout gear is taken measurement bent axle carrying out throw of crankshaft size, base is put on main bearing journal, and dial indicator head contact connecting rod neck, reads the registration of table; Finally carry out the numerical computations of crank radius size, obtain the testing result needed for us, detailed method for computing data is as follows:
First, we suppose that the actual excircle dimension of trunnion is Ф master, and the actual excircle dimension of rod journal is that Ф connects, and trunnion drawing excircle dimension is D master, and connecting rod neck drawing excircle dimension is that D connects, and the theoretical throw of crankshaft size of bent axle is LA, and actual throw of crankshaft size is L.Because trunnion, rod journal cylindrical are the sizes of refining out, their tolerance is inevitable all very little, and it is very little, negligible on the impact of bent axle actual throw of crankshaft.Therefore trunnion, pitman shaft actual size to the increment △ X computing formula of indicator, we can be summarized as: △ X=(Ф connect-D connect)/2-[(Ф master-D master)/2]/cos30 °=(Ф connects-D and connects)/2-(Ф master-D master) * 0.577 we according to the difference of main bearing journal and connecting rod neck cylindrical grinding process order, be divided into following situation to discuss:
1. when trunnion is final cylindricalo grinding size, when rod journal is undressed to final size;
2. when main shaft axle journal is undressed to final size, when connecting rod neck is final cylindricalo grinding size;
3. when trunnion, rod journal all undressed to figure paper size time;
Above three kinds of situations all can operate according to step below:
Throw of crankshaft checkout gear (3) is first used to turn (1) upper his-and-hers watches at bent axle list, adjust amesdial pointer to be 0, then use checkout gear (3) on bent axle, to measure actual meter-pressing amount △ Y, when pointer turns clockwise more than 0 graduation mark, reading △ Y is just, when turning counterclockwise, reading △ Y is negative.A. as Survey meter-pressing amount △ Y-△ X > 0, throw of crankshaft be on the occasion of, actual throw of crankshaft size is L=LA+(△ Y-△ X); B. as Survey meter-pressing amount △ Y-△ X < 0, throw of crankshaft is negative value, and actual throw of crankshaft size is L=LA+(△ Y-△ X).According to the actual size of L, the eccentric frock of grinding operator to grinding machine adjusts, and then reaches the object revising throw of crank shaft size.In like manner according to the third situation above-mentioned, we can be generalized to this throw of crankshaft measurement frock on other model bent axle and use.When crankshaft journal (trunnion or connecting rod neck) size changes
[note 1]as long as throw of crankshaft size is identical, applies this frock and measure and calculate △ X and △ Y, just can measure actual throw of crankshaft size and come.(note 1: △ X can not exceed dial gauge or amesdial range, and suggestion is no more than 80% of range.If exceed range, just need again to make bent axle list and turn.）
Accompanying drawing explanation
Fig. 1 is throw of crankshaft checkout gear;
1, bent axle list turns; 2, rack; 3, checkout gear;
Fig. 2 is base.
Claims (3)
1. are a kind of throw of crank shaft detection methods, it is characterized in that: turn as reference-calibrating with bent axle list, to turn at bent axle list by checkout gear and carry out pressure table and his-and-hers watches; Then checkout gear is taken measurement bent axle carrying out throw of crankshaft size, base is put on main bearing journal, and dial indicator head contact connecting rod neck, reads the registration of table; Finally carry out the numerical computations of crank radius size, obtain the testing result needed for us.
2. checkout gear is the part that throw of crank shaft detects frock, it is characterized in that: device is equipped with dial gauge or amesdial, reads registration during for measuring throw of crankshaft; Below checkout gear, base is housed, angle is 120 °, plays the effect of location in measuring process.
3. bent axle list turns is that throw of crank shaft detects the part of frock, it is characterized in that: the shape of simulation bent axle, the checkout gear face of being placed on it is used for subsidiary and check and correction dial gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410189892.4A CN105081973B (en) | 2014-05-07 | 2014-05-07 | Throw of crank shaft detecting tool and its use measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410189892.4A CN105081973B (en) | 2014-05-07 | 2014-05-07 | Throw of crank shaft detecting tool and its use measuring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105081973A true CN105081973A (en) | 2015-11-25 |
| CN105081973B CN105081973B (en) | 2018-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410189892.4A Active CN105081973B (en) | 2014-05-07 | 2014-05-07 | Throw of crank shaft detecting tool and its use measuring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105081973B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107877260A (en) * | 2016-09-30 | 2018-04-06 | 青岛淄柴博洋柴油机股份有限公司 | The detection method of lathe bias frock |
| CN113218282A (en) * | 2021-06-25 | 2021-08-06 | 河南柴油机重工有限责任公司 | Device and method for measuring small semicircular diameter of shaft part |
| CN115555999A (en) * | 2022-10-28 | 2023-01-03 | 一汽解放汽车有限公司 | Axial calibration tool for crankshaft grinding |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3905116A (en) * | 1973-10-15 | 1975-09-16 | Allis Chalmers | Crankshaft bearing measuring apparatus |
| CN101608896A (en) * | 2009-07-17 | 2009-12-23 | 北京二七轨道交通装备有限责任公司 | A kind of testing tool of crankshaft-link rod pin and detection method |
| CN201532181U (en) * | 2009-11-06 | 2010-07-21 | 广州柴油机厂 | Tool for detecting eccentricity of crankshaft crooked neck |
| CN103644809A (en) * | 2013-12-25 | 2014-03-19 | 淄博柴油机总公司 | Crankshaft stroke measurement device and method |
-
2014
- 2014-05-07 CN CN201410189892.4A patent/CN105081973B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3905116A (en) * | 1973-10-15 | 1975-09-16 | Allis Chalmers | Crankshaft bearing measuring apparatus |
| CN101608896A (en) * | 2009-07-17 | 2009-12-23 | 北京二七轨道交通装备有限责任公司 | A kind of testing tool of crankshaft-link rod pin and detection method |
| CN201532181U (en) * | 2009-11-06 | 2010-07-21 | 广州柴油机厂 | Tool for detecting eccentricity of crankshaft crooked neck |
| CN103644809A (en) * | 2013-12-25 | 2014-03-19 | 淄博柴油机总公司 | Crankshaft stroke measurement device and method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107877260A (en) * | 2016-09-30 | 2018-04-06 | 青岛淄柴博洋柴油机股份有限公司 | The detection method of lathe bias frock |
| CN113218282A (en) * | 2021-06-25 | 2021-08-06 | 河南柴油机重工有限责任公司 | Device and method for measuring small semicircular diameter of shaft part |
| CN115555999A (en) * | 2022-10-28 | 2023-01-03 | 一汽解放汽车有限公司 | Axial calibration tool for crankshaft grinding |
| CN115555999B (en) * | 2022-10-28 | 2024-05-10 | 一汽解放汽车有限公司 | Axial alignment tool for crankshaft grinding |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105081973B (en) | 2018-06-01 |
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