CN107228614B - A detection device and detection method for a six-cylinder crankshaft phase angle - Google Patents

Abstract

The invention discloses a six-cylinder crankshaft phase angle detection device and a six-cylinder crankshaft phase angle detection method, wherein the six-cylinder crankshaft phase angle detection device comprises measurement brackets, a connecting rod neck positioning block, a dial indicator and a connecting shaft, the two measurement brackets are respectively arranged at two ends of the connecting shaft, five dial indicators are arranged on the connecting shafts of the two measurement brackets, the connecting rod positioning block is arranged between one end of the connecting shaft and an adjacent dial indicator, the two measurement brackets are respectively arranged on the excircle of a first connecting rod neck of a six-cylinder crankshaft, the connecting rod neck positioning block is clung to the excircle of a first connecting rod neck of the six-cylinder crankshaft, and the five dial indicators are respectively arranged on the excircle side surfaces of a second connecting rod neck, a third connecting rod neck, a fourth connecting rod neck, a fifth connecting rod neck and a sixth connecting rod neck of the six-cylinder crankshaft and are perpendicular to central connecting lines of the corresponding connecting rod neck and the main shaft neck. The device is used for checking the phase angle of the six-cylinder crankshaft, and the detection is carried out in a mode of comparing and detecting with a standard component, so that the detection accuracy is high, and the on-line detection is realized.

Description

A detection device and detection method for a six-cylinder crankshaft phase angle

technical field

The invention relates to the field of crankshaft processing of automobile engines, in particular to a detection device and a detection method for the phase angle of a six-cylinder crankshaft.

Background technique

The crankshaft is one of the important parts in the engine. The phase angle of the connecting rod of the six-cylinder crankshaft is uniformly distributed in 120° space. The position accuracy of the neck axis (crankshaft phase angle accuracy) directly affects the performance of the engine, so its processing and measurement are more complicated. The currently commonly used method for measuring the 120° phase angle deviation of the crankshaft connecting rod has defects such as low measurement accuracy, inconvenient operation, slow measurement speed, and time-consuming and labor-intensive work.

At present, the phase angle of the connecting rod of the conventional six-cylinder crankshaft is 120°, the first connecting rod journal is the reference journal, and the error of other journals relative to the first connecting rod journal is usually detected on the platform. The detection is cumbersome, the efficiency is low, the problem cannot be found in time, and the detection error is large, which is easily affected by human factors.

Contents of the invention

The object of the present invention is to solve the problems of the prior art, and provide a detection device and detection method for the phase angle of a six-cylinder crankshaft. The method has small error and high precision.

The technical scheme that realizes the object of the present invention is:

A detection device for the phase angle of a six-cylinder crankshaft, comprising a first measuring bracket, a second measuring bracket, a pin neck positioning block, a first dial indicator, a second dial indicator, a third dial indicator, and a fourth dial indicator The meter, the fifth dial indicator and the connecting shaft, the first measuring bracket and the second measuring bracket are respectively arranged at the two ends of the connecting shaft, and the connecting shaft between the first measuring bracket and the second measuring bracket is arranged in turn for the positioning of the connecting rod neck block, the first dial gauge, the second dial gauge, the third dial gauge, the fourth dial gauge, and the fifth dial gauge; the first measuring bracket and the second measuring bracket are mounted on the first I And on the outer circle of the VII main journal, the connecting pin journal positioning block is close to the outer circle of the first connecting pin journal of the six-cylinder crankshaft, the first dial indicator, the second dial indicator, the third dial indicator, the fourth indicator The dial gauge and the fifth dial gauge are respectively arranged on the outer circular sides of the second, third, fourth, fifth and sixth connecting rod journals of the six-cylinder crankshaft. Perpendicular to the line connecting the centers of the corresponding connecting pin journal and main journal.

The connecting shaft is a V-shaped connecting shaft.

The V-shaped connecting shaft is a V-shaped connecting shaft with an opening of 120°.

The method for using the detection device of the above-mentioned six-cylinder crankshaft phase angle specifically includes the following steps:

1) Calibrate the standard shaft: the standard shaft is based on the first connecting rod journal, and the ADCOLE crankshaft comprehensive detector is used to measure the second connecting rod journal, the third connecting rod journal, the fourth connecting rod journal, the fifth connecting rod journal, the Phase angle deviation α ₂ , α ₃ , α ₄ , α ₅ , α ₆ of six connecting rod necks, and use the formula L _n =Sinα _n ×R _theory , n∈N*, and 1≤n≤6, to convert each The linear value of the deviation of the connecting pin; where L _n is the linear value of the phase angle deviation of the connecting pin, α _n is the phase angle deviation of the connecting pin, and R _theory is the theoretical center height of the connecting pin;

2) Calibration of the detection device: place the first measuring bracket and the second measuring bracket of the testing device on the outer circles of the first and VII main journals of the calibration standard shaft respectively, and the connecting rod journal positioning block is close to the six-cylinder crankshaft For the outer circle of the first connecting pin, set the pointers of the first, fourth and fifth dial indicators corresponding to the phases of the second, fifth and sixth connecting pins down. Press 1mm to zero, and then adjust the deviation value of the dial indicator according to the actual value phase angle deviation linear value of the second, fifth and sixth connecting rod necks of the standard parts; remove the detection device, and then The first measuring bracket and the second measuring bracket of the detection device are mounted on the other side of the outer circle of the first and VII main journals of the calibration standard shaft respectively, and the connecting pin journal positioning block is positioned closely on the other side of the first connecting pin journal. On the one hand, first press down the pointers of the third and fourth connecting pin necks to the second and third dial indicators by 1mm to zero, and then press the third connecting pin neck and the fourth connecting pin neck of the standard parts The actual value of the hosel, the linear value of the phase angle deviation, adjust the deviation value of the dial indicator, and the calibration is completed;

3) Phase angle detection of the six-cylinder crankshaft: place the first measuring bracket and the second measuring bracket of the testing device on the outer circles of the main journals I and VII of the tested crankshaft respectively, and the connecting rod journal positioning block is close to The outer circle of a connecting pin, the measurement of the first dial indicator, the fourth dial indicator and the fifth dial indicator corresponding to the phase of the second connecting pin, the fifth connecting pin and the sixth connecting pin of the device The rod rests on the corresponding connecting pin, and directly reads the actual deviation value L _n ′ (n=2, 5, 6) Take down the testing device, and place the first measuring bracket and the second measuring bracket of the testing device on the outer circles of the main journals I and VII of the tested crankshaft respectively, and the connecting rod journal positioning block is close to the first On the other side of the outer circle of the connecting pin neck, the measuring rods of the second and third dial indicators corresponding to the phases of the third and fourth connecting pin necks of the device lean against the corresponding connecting pin necks, Directly read the actual deviation value L _n ′ (n=3, 4) of the dial indicators on the third and fourth connecting pin necks from the dial indicator;

4) Comparison of detected values: compare the corresponding connecting pin neck deviation value L _n ′ (n=2, 3, 4, 5, 6) measured by the dial gauge of the device with L _theory = Sinα _theory × R _theory , if If L _n ′≤L _theory , the phase angle of the crankshaft is qualified, otherwise it is unqualified.

Beneficial effects: the device has a simple structure and can perform on-line detection. The detection device is easy to operate, and the detection is carried out in a manner of comparing detection with standard parts, and the detection accuracy is high, thereby realizing on-line detection.

Description of drawings

Fig. 1 is a front view of a six-cylinder crankshaft phase angle detection device mounted on a six-cylinder crankshaft;

Fig. 2 is a side view of a six-cylinder crankshaft phase angle detection device mounted on a six-cylinder crankshaft;

In the figure, 1. The first measuring bracket 2. The connecting rod neck positioning block 3. The connecting shaft 4. The first dial indicator 5. The second dial indicator 6. The third dial indicator 7. The fourth dial indicator 8. Fifth dial indicator 9. Second measuring bracket 10. Standard axis Ⅰ. Main journal Ⅰ Ⅱ. Main journal Ⅱ Ⅲ. Main journal Ⅲ Ⅳ. Main journal Ⅳ Ⅴ. Main journal Ⅴ Ⅵ Main journal Ⅵ Neck Ⅶ. Main journal Ⅶ 1P. First connecting pin 2P. Second connecting rod 3P. Third connecting rod 4P. Fourth connecting rod 5P. Fifth connecting rod 6P. Sixth connecting rod.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited thereto.

Example:

As shown in Fig. 1 and Fig. 2, a detection device for the phase angle of a six-cylinder crankshaft includes a first measuring bracket 1, a second measuring bracket 9, a pin neck positioning block 2, a first dial indicator 4, a second hundred The sub-meter 5, the third dial indicator 6, the fourth dial indicator 7, the fifth dial indicator 8 and the connecting shaft 3, the first measuring bracket 1 and the second measuring bracket 9 are respectively arranged at the two ends of the connecting shaft 3, On the connecting shaft 3 between the first measuring bracket 1 and the second measuring bracket 9, the connecting pin neck positioning block 2, the first dial gauge 4, the second dial gauge 5, the third dial gauge 6, the fourth dial gauge Dial gauge 7, fifth dial gauge 8; the first measuring bracket 1 and the second measuring bracket 9 are respectively mounted on the outer circles of the first and VII main journals of the six-cylinder crankshaft, and the connecting rod journal positioning block 2 is close to the For the outer circle of the first connecting rod journal 1P of the six-cylinder crankshaft, the first dial gauge 4, the second dial gauge 5, the third dial gauge 6, the fourth dial gauge 7, and the fifth dial gauge 8 are set respectively On the outer circle side of the second pin journal 2P, the third pin journal 3P, the fourth pin journal 4P, the fifth pin journal 5P, and the sixth pin journal 6P of the six-cylinder crankshaft and perpendicular to the corresponding pin journal and the center of the main journal.

The connecting shaft 3 is a V-shaped connecting shaft 3 .

The V-shaped connecting shaft is a V-shaped connecting shaft 3 with an opening of 120°.

The method for using the detection device of the above-mentioned six-cylinder crankshaft phase angle specifically includes the following steps:

1) Calibrate the standard shaft: the standard shaft 10 is based on the first connecting rod journal 1P, and the second connecting rod journal 2P, the third connecting rod journal 3P, the fourth connecting rod journal 4P, the fifth connecting rod Phase angle deviation α ₂ , α ₃ , α ₄ , α ₅ , α ₆ of connecting rod neck 5P and sixth connecting rod neck 6P, and use the formula L _n =Sinα _n ×R _theory , n∈N*, and 1≤n ≤6, the deviation linear value of each pin neck is converted; where L _n is the linear value of the phase angle deviation of the pin neck, α _n is the phase angle angle deviation of the pin neck, and R _theory is the theoretical center height of the pin neck;

2) Calibration of the detection device: place the first measurement bracket 1 and the second measurement bracket 9 of the detection device on the outer circles of the first and VII main journals of the calibration standard shaft 10 respectively, and the connecting rod journal positioning block 2 is close to the The outer circle of the first pin journal 1P of the six-cylinder crankshaft, the first dial gauge 4 and the fourth dial gauge corresponding to the phases of the second pin journal 2P, the fifth pin journal 5P and the sixth pin journal 6P 7 and the pointer of the fifth dial indicator 8 are pressed down by 1mm to zero, and then adjusted according to the actual value phase angle deviation linear value of the second pin neck 2P, the fifth pin pin 5P and the sixth pin pin 6P of the standard parts Check the deviation value of the dial indicator; take off the detection device, and then set the first measurement bracket 1 and the second measurement bracket 9 of the detection device on the other side of the outer circle of the first I and VII main journals of the calibration standard shaft 10, Position the connecting pin neck positioning block 2 closely on the other side of the first connecting pin neck 1P, and first align the phases of the third connecting pin neck 3P and the fourth connecting pin neck 4P with the second dial indicator 5 and the third dial indicator Press the pointer of 6 down by 1mm to zero, and then adjust the deviation value of the dial indicator according to the actual value phase angle deviation linear value of the third connecting rod neck 3P and the fourth connecting rod neck 4P of the standard parts, and the calibration is completed;

3) Phase angle detection of the six-cylinder crankshaft: place the first measuring bracket 1 and the second measuring bracket 9 of the testing device on the outer circles of the first and VII main journals of the crankshaft to be tested respectively, and the connecting rod journal positioning block 2 Close to the outer circle of the first pin neck 1P, the phases of the second pin pin 2P, fifth pin pin 5P and sixth pin pin 6P of the device correspond to the first dial gauge 4 and the fourth dial gauge 7 and the measuring rods of the fifth dial indicator 8 lean against the corresponding connecting pin necks, and directly read the values on the second connecting pin neck 2P, the fifth connecting pin neck 5P and the sixth connecting pin neck 6P from the dial indicator. Actual deviation value L _n ′ (n=2, 5, 6); remove the detection device, and then set the first measurement bracket 1 and the second measurement bracket 9 of the detection device on the first and seventh main shafts of the measured crankshaft respectively On the outer circle of the neck, the connecting pin neck positioning block 2 is close to the other side of the outer circle of the first connecting pin neck 1P, and the second dial indicator corresponding to the phase of the third connecting pin neck 3P and the fourth connecting pin neck 4P of the device 5 and the measuring rods of the third dial indicator 6 lean against the corresponding connecting pin neck, and directly read the actual deviation value L of the dial indicator on the third connecting pin neck 3P and the fourth connecting pin neck 4P neck from the dial indicator _n '(n=3, 4);

4) Comparison of detected values: compare the corresponding connecting pin neck deviation value L _n ′ (n=2, 3, 4, 5, 6) measured by the dial gauge of the device with L _theory = Sinα _theory × R _theory , if If L _n ′≤L _theory , the phase angle of the crankshaft is qualified, otherwise it is unqualified.

Claims (4)

1. A detection device for a six-cylinder crankshaft phase angle, characterized in that it comprises a first measuring bracket, a second measuring bracket, a connecting rod neck positioning block, a first dial indicator, a second dial indicator, a third dial indicator meter, the fourth dial indicator, the fifth dial indicator and the connecting shaft, the first measuring bracket and the second measuring bracket are respectively arranged at the two ends of the connecting shaft, and on the connecting shaft between the first measuring bracket and the second measuring bracket Set the pin neck positioning block, the first dial gauge, the second dial gauge, the third dial gauge, the fourth dial gauge, and the fifth dial gauge in sequence; the first measuring bracket and the second measuring bracket are mounted on the On the outer circle of the No. I and No. VII main journals of the six-cylinder crankshaft, the connecting pin positioning block is close to the outer circle of the first connecting pin journal of the six-cylinder crankshaft. The first dial indicator, the second dial indicator, and the third dial indicator The dial gauge, the fourth dial gauge, and the fifth dial gauge are respectively set on the second, third, fourth, fifth, and sixth connecting rod journals of the six-cylinder crankshaft. The outer circular side of the neck is perpendicular to the line connecting the center of the corresponding connecting rod neck and the main journal. 2. A detection device for a phase angle of a six-cylinder crankshaft according to claim 1, wherein the connecting shaft is a V-shaped connecting shaft. 3. A six-cylinder crankshaft phase angle detection device according to claim 2, characterized in that the V-shaped connecting shaft is a V-shaped connecting shaft with an opening of 120°. 4. a detection method of a detection device of a six-cylinder crankshaft phase angle, is characterized in that, specifically comprises the steps: 1) Calibrate the standard shaft: the standard shaft is based on the first connecting rod journal, and the ADCOLE crankshaft comprehensive detector is used to measure the second connecting rod journal, the third connecting rod journal, the fourth connecting rod journal, the fifth connecting rod journal, the Phase angle deviation α ₂ , α ₃ , α ₄ , α ₅ , α ₆ of six connecting rod necks, and use the formula L _n =Sinα _n ×R _theory , n∈N*, and 1≤n≤6, to convert each The linear value of the deviation of the connecting pin; where L _n is the linear value of the phase angle deviation of the connecting pin, α _n is the phase angle deviation of the connecting pin, and R _theory is the theoretical center height of the connecting pin; 2) Calibration of the detection device: place the first measuring bracket and the second measuring bracket of the testing device on the outer circles of the first and VII main journals of the calibration standard shaft respectively, and the connecting rod journal positioning block is close to the six-cylinder crankshaft For the outer circle of the first connecting pin, set the pointers of the first, fourth and fifth dial indicators corresponding to the phases of the second, fifth and sixth connecting pins down. Press 1mm to zero, and then adjust the deviation value of the dial indicator according to the actual value phase angle deviation linear value of the second, fifth and sixth connecting rod necks of the standard parts; remove the detection device, and then The first measuring bracket and the second measuring bracket of the detection device are mounted on the other side of the outer circle of the first and VII main journals of the calibration standard shaft respectively, and the connecting pin journal positioning block is positioned closely on the other side of the first connecting pin journal. On the one hand, first press down the pointers of the third and fourth connecting pin necks to the second and third dial indicators by 1mm to zero, and then press the third connecting pin neck and the fourth connecting pin neck of the standard parts The actual value of the hosel, the linear value of the phase angle deviation, adjust the deviation value of the dial indicator, and the calibration is completed; 3) Phase angle detection of the six-cylinder crankshaft: place the first measuring bracket and the second measuring bracket of the testing device on the outer circles of the main journals I and VII of the tested crankshaft respectively, and the connecting rod journal positioning block is close to The outer circle of a connecting pin, the measurement of the first dial indicator, the fourth dial indicator and the fifth dial indicator corresponding to the phase of the second connecting pin, the fifth connecting pin and the sixth connecting pin of the device The rod rests on the corresponding connecting pin, directly read the actual deviation value L _n ′ of the second connecting pin, the fifth connecting pin and the sixth connecting pin from the dial gauge, n=2,5, 6. Take down the detection device, and then place the first measuring bracket and the second measuring bracket of the testing device on the outer circles of the first and VII main journals of the tested crankshaft respectively, and the connecting rod journal positioning block is close to the first connecting pin. On the other side of the outer circle of the hosel neck, the measuring rods of the second and third dial indicators corresponding to the phases of the third and fourth connecting pin necks of the device lean against the corresponding connecting pin necks. The dial indicator directly reads the actual deviation value L _n ′ of the dial indicators on the third and fourth connecting pin necks, n=3,4; 4) Comparison of detected values: compare the corresponding connecting rod neck deviation value L _n ′ measured by the dial gauge of the device with L _theory = Sinα _theory × R _theory , where n=2, 3, 4, 5, 6, if If L _n ′≤L _theory , the phase angle of the crankshaft is qualified, otherwise it is unqualified.

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