CN105571435A - On-line detection method of position degrees of pin holes of planet carrier - Google Patents

Abstract

The invention discloses an on-line detection method of position degrees of pin holes of a planet carrier. The on-line detection method comprises steps of by use of a common inside micrometer and a double-bulb micrometer, measuring the short distance between every pin holes and a standard hole and the short distance among the pin holes online; and the obtaining precise data of position degrees of the pin holes of the planet carrier via calculation. In this way, on-line detection of the position degrees of the pin holes of the planet carrier is achieved; time for disassembly, inspection and shut-down waiting is avoided; processing while detecting and timely repairing and correcting when there is a problem are achieved; and effectively safeguard measures are provided for lean manufacturing.

Description

A kind of online test method of planet carrier pin hole position

Technical field

The present invention relates to a kind of detection method of planet carrier pin-and-hole machining precision, particularly relate to the online test method of planet carrier pin hole position.

Background technology

Planet carrier is the strength member in Planetary Gear Transmission, and in the manufacture process of planet carrier, the position degree of pin-and-hole is emphasis is also difficult point.If pin hole position does not meet the demands, will directly cause Planetary Gear Transmission unbalance loading, this will reduce the life-span of whole gear train assembly greatly.The finishing of current pin-and-hole mainly adopts high-precision horizontal or vertical vertical boring and turning mill, and coordinates three-dimensional detector to ensure its position degree requirement, but three-dimensional detects, and unproductive time is long, cost is high, difficulty of doing over again is large, constrains batch production efficiency greatly; Or adopt special measurement tool, there is above-mentioned problem equally.

Therefore invention is a kind of measures precisely, and efficiency is high, the detection method of processing site and exercisable planet carrier pin hole position is just very necessary.

Summary of the invention

Object of the present invention is exactly to solve the above-mentioned problems in the prior art, provides a kind of and singlely can to operate, simple and convenient planet carrier pin hole position online test method.

Object of the present invention will be achieved by the following technical programs:

An online test method for planet carrier pin hole position, comprises the steps:

S1, measures the benchmark endoporus of described planet carrier and the diameter of multiple pin-and-hole respectively;

S2, measures the bee-line between each pin-and-hole of described planet carrier and benchmark endoporus respectively;

S3, measures the bee-line between the pin-and-hole of described planet carrier and pin-and-hole respectively;

S4, chooses a benchmark pin-and-hole, the angle between Calculation Basis pin-and-hole and all the other pin-and-holes;

S5, the central coordinate of circle of Calculation Basis pin-and-hole and all the other pin-and-holes, draws the position degree of pin-and-hole.

Wherein, step S1 utilizes micrometer inside caliper to measure.Step S2, S3 utilize two bulb miking.

When described pin-and-hole quantity is three, the online test method of described a kind of planet carrier pin hole position, specifically comprises the steps:

S1, measure three pin-and-holes of described planet carrier and the diameter of benchmark endoporus, be respectively d ₁, d ₂, d ₃, d ₄;

S2, measure bee-line between three pin-and-holes of described carrier and benchmark endoporus, be respectively L ₁, L ₂, L ₃;

S3, measure bee-line between described planet carrier pin-and-hole and pin-and-hole, be respectively L ₄, L ₅, L ₆;

S4, choose a benchmark pin-and-hole, the angle by between formula I, II Calculation Basis pin-and-hole and all the other two pin-and-holes:

${\mathrm{\α}}_1=arccos\frac{a_1^2+b_1^2-c_1^2}{2a_1{b}_1}$ Formula I;

${\mathrm{\α}}_2=arccos\frac{a_1^2+b_2^2-c_2^2}{2a_1{b}_2}$ Formula II;

Wherein: a ₁=d ₁/ 2+d ₄/ 2+L ₁, b ₁=d ₂/ 2+d ₄/ 2+L ₂, c ₁=d ₁/ 2+d ₂/ 2+L ₄, b ₂=d ₃/ 2+d ₄/ 2+L ₃, c ₂=d ₁/ 2+d ₃/ 2+L ₅;

S5, choose described benchmark pin-and-hole as metewand, then central coordinate of circle (the x of this pin-and-hole ₁, y ₁) be:

$\left.\begin{array}{c}{x}_1=0\\ y_1=d_1/2+d_4/2+L_1\end{array}\right\}$ Formula III;

Calculate the central coordinate of circle (x of second pin-and-hole ₂, y ₂):

$\left.\begin{array}{c}{x}_2=-b_1\×\cos \left({\mathrm{\α}}_1-90\right)\\ y_2=-b_1\×sin\left({\mathrm{\α}}_1-90\right)\end{array}\right\}$ Formula IV;

Calculate the central coordinate of circle (x of the 3rd pin-and-hole ₃, y ₃):

$\left.\begin{array}{c}{x}_3=b_2\×\cos ({\mathrm{\α}}_1-90)\\ y_3=-b_2\×sin({\mathrm{\α}}_1-90)\end{array}\right\}$ Formula V;

S6, calculate the position degree of three pin-and-holes by formula VI, VII, VIII:

The position degree of first pin-and-hole is:

W ₁=d ₅-2 × y ₁formula VI;

The position degree of second pin-and-hole is:

$w_2=2\×\sqrt{{(\sqrt{3}/4\×d_5+x_2)}^2-{(d_5/4+y_2)}^2}$ Formula VII;

The position degree of the 3rd pin-and-hole is:

$w_3=2\×\sqrt{{(\sqrt{3}/4\×d_5-x_3)}^2-{(d_5/4+y_3)}^2}$ Formula VIII;

Wherein: d ₅for pin-and-hole pitch circle diameter nominal value.

The advantage of technical solution of the present invention is mainly reflected in: only need to adopt common micrometer inside caliper and two bulb milscale; by simple measurement and calculation; namely the on-line checkingi of planet carrier pin hole position is achieved; avoid the time of dismounting, censorship, shutdown wait; achieve limit processing, frontier inspection survey; problem is had to reprocess the object of correction in time, for lean production provides effective safeguard.

Accompanying drawing explanation

Fig. 1 is instrumentation plan of the present invention;

Fig. 2 is the schematic diagram of the planet carrier pin-and-hole that the present invention measures.

Embodiment

Object of the present invention, advantage and disadvantage, by for illustration and explanation for the non-limitative illustration passing through preferred embodiment below.These embodiments are only the prominent examples of application technical solution of the present invention, allly take equivalent replacement or equivalent transformation and the technical scheme that formed, all drop within the scope of protection of present invention.

As shown in the figure, present invention is disclosed a kind of online test method of planet carrier pin hole position.Described planet carrier exists pin-and-hole 1, pin-and-hole 2, pin-and-hole 3 and datum hole 4, wherein three pin-and-holes are uniformly distributed, and pitch circle diameter nominal value is d ₅.The center of circle of described datum hole 4 is set to true origin, and the central coordinate of circle of pin-and-hole 1, pin-and-hole 2, pin-and-hole 3 is respectively (x ₁, y ₁), (x ₂, y ₂), (x ₃, y ₃).

The online test method of planet carrier pin hole position of the present invention, adopts common micrometer inside caliper and two bulb milscale, and comprises following steps:

The first step: utilize micrometer inside caliper, measures the diameter of the pin-and-hole 1 of described planet carrier, pin-and-hole 2, pin-and-hole 3 and datum hole 4, is respectively d ₁, d ₂, d ₃, d ₄.

Second step: utilize two bulb milscale, measures the pin-and-hole 1 of described planet carrier, pin-and-hole 2, bee-line between pin-and-hole 3 and datum hole 4 respectively, is respectively L ₁, L ₂, L ₃.

3rd step: utilize two bulb milscale, measures described pin-and-hole 1 and pin-and-hole 2 respectively, and pin-and-hole 1 and pin-and-hole 3, the bee-line between pin-and-hole 2 and pin-and-hole 3, is respectively L ₄, L ₅, L ₆.

4th step: calculate pin-and-hole 1 and pin-and-hole 2, the angle α of pin-and-hole 1 and pin-and-hole 3 ₁and α ₂:

${\mathrm{\α}}_1=arccos\frac{a_1^2+b_1^2-c_1^2}{2a_1{b}_1}$ Formula I;

${\mathrm{\α}}_2=arccos\frac{a_1^2+b_2^2-c_2^2}{2a_1{b}_2}$ Formula II;

Wherein: a ₁=d ₁/ 2+d ₄/ 2+L ₁, b ₁=d ₂/ 2+d ₄/ 2+L ₂, c ₁=d ₁/ 2+d ₂/ 2+L ₄, b ₂=d ₃/ 2+d ₄/ 2+L ₃, c ₂=d ₁/ 2+d ₃/ 2+L ₅.

5th step: the central coordinate of circle calculating pin-and-hole 1.According to the position degree computing method of three-dimensional detector, choose pin-and-hole 1 as metewand, then coordinate (the x of pin-and-hole 1 ₁, y ₁) be:

$\left.\begin{array}{c}{x}_1=0\\ y_1=d_1/2+d_4/2+L_1\end{array}\right\}$ Formula III.

6th step: the central coordinate of circle (x calculating pin-and-hole 2 ₂, y ₂):

$\left.\begin{array}{c}{x}_2=-b_1\×\cos \left({\mathrm{\α}}_1-90\right)\\ y_2=-b_1\×sin\left({\mathrm{\α}}_1-90\right)\end{array}\right\}$ Formula IV.

7th step: the central coordinate of circle (x calculating pin-and-hole 3 ₃, y ₃):

$\left.\begin{array}{c}{x}_3=b_2\×\cos ({\mathrm{\α}}_1-90)\\ y_3=-b_2\×sin({\mathrm{\α}}_1-90)\end{array}\right\}$ Formula V.

8th step: the position degree calculating pin-and-hole 1, pin-and-hole 2, pin-and-hole 3:

The position degree of pin-and-hole 1 is:

W ₁=d ₅-2 × y ₁formula VI;

The position degree of pin-and-hole 2 is:

$w_2=2\×\sqrt{{(\sqrt{3}/4\×d_5+x_2)}^2-{(d_5/4+y_2)}^2}$ Formula VII;

The position degree of pin-and-hole 3 is:

$w_3=2\×\sqrt{{(\sqrt{3}/4\×d_5-x_3)}^2-{(d_5/4+y_3)}^2}$ Formula VIII;

Wherein: d ₅for the nominal value of the pitch circle diameter of pin-and-hole 1, pin-and-hole 2, pin-and-hole 3.

The present invention still has numerous embodiments, all employing equivalents or equivalent transformation and all technical schemes formed, and all drops within protection scope of the present invention.

Claims (5)

1. an online test method for planet carrier pin hole position, is characterized in that: comprise the steps:

S1, measures the benchmark endoporus of described planet carrier and the diameter of multiple pin-and-hole respectively;

S2, measures the bee-line between each pin-and-hole of described planet carrier and benchmark endoporus respectively;

S3, measures the bee-line between the pin-and-hole of described planet carrier and pin-and-hole respectively;

S4, chooses a benchmark pin-and-hole, the angle between Calculation Basis pin-and-hole and all the other pin-and-holes;

S5, the central coordinate of circle of Calculation Basis pin-and-hole and all the other pin-and-holes, draws the position degree of pin-and-hole.

2. the online test method of a kind of planet carrier pin hole position according to claim 1, is characterized in that: step S1 utilizes micrometer inside caliper to measure.

3. the online test method of a kind of planet carrier pin hole position according to claim 1, is characterized in that: step S2, S3 utilize two bulb miking.

4. the online test method of a kind of planet carrier pin hole position according to claim 1, is characterized in that: described pin-and-hole quantity is three.

5. the online test method of a kind of planet carrier pin hole position according to claim 4, is characterized in that: specifically comprise the steps:

S1, measure three pin-and-holes of described planet carrier and the diameter of benchmark endoporus, be respectively d ₁, d ₂, d ₃, d ₄;

S2, measure bee-line between three pin-and-holes of described carrier and benchmark endoporus, be respectively L ₁, L ₂, L ₃;

S3, measure bee-line between described planet carrier pin-and-hole and pin-and-hole, be respectively L ₄, L ₅, L ₆;

S4, choose a benchmark pin-and-hole, the angle by between formula I, II Calculation Basis pin-and-hole and all the other two pin-and-holes:

${\mathrm{\α}}_1=\arccos \frac{a_1^2+b_1^2-c_1^2}{2a_1{b}_1}$ Formula I;

${\mathrm{\α}}_2=\arccos \frac{a_1^2+b_2^2-c_2^2}{2a_1{b}_2}$ Formula II;

Wherein: a ₁=d ₁/ 2+d ₄/ 2+L ₁, b ₁=d ₂/ 2+d ₄/ 2+L ₂, c ₁=d ₁/ 2+d ₂/ 2+L ₄, b ₂=d ₃/ 2+d ₄/ 2+L ₃, c ₂=d ₁/ 2+d ₃/ 2+L ₅;

S5, choose described benchmark pin-and-hole as metewand, then central coordinate of circle (the x of this pin-and-hole ₁, y ₁) be:

$\left.\begin{array}{c}{x}_1=0\\ y_1=d_1/2+d_4/2+L_1\end{array}\right\}$ Formula III;

Calculate the central coordinate of circle (x of second pin-and-hole ₂, y ₂):

$\left.\begin{array}{c}{x}_2=-b_1\×\cos ({\mathrm{\α}}_1-90)\\ y_2=-b_1\×sin({\mathrm{\α}}_1-90)\end{array}\right\}$ Formula IV;

Calculate the central coordinate of circle (x of the 3rd pin-and-hole ₃, y ₃):

$\left.\begin{array}{c}{x}_3=b_2\×\cos ({\mathrm{\α}}_1-90)\\ y_3=-b_2\×sin({\mathrm{\α}}_1-90)\end{array}\right\}$ Formula V;

S6, calculate the position degree of three pin-and-holes by formula VI, VII, VIII:

The position degree of first pin-and-hole is:

W ₁=d ₅-2 × y ₁formula VI;

The position degree of second pin-and-hole is:

$w_2=2\×\sqrt{{(\sqrt{3}/4\×d_5+x_2)}^2-{(d_5/4+y_2)}^2}$ Formula VII;

The position degree of the 3rd pin-and-hole is:

$w_3=2\×\sqrt{{(\sqrt{3}/4\×d_5-x_3)}^2-{(d_5/4+y_3)}^2}$ Formula VIII;

Wherein: d ₅for pin-and-hole pitch circle diameter nominal value.