阅读说明：本技术 一种用于驱动单元多种销等级选择的选择方法 (Selection method for selecting multiple pin grades of driving unit ) 是由 甘元泉 姚秀涛 黄伟 于 2020-04-24 设计创作，主要内容包括：本发明设计汽车转向系统装配技术领域,具体的讲是一种用于驱动单元多种销等级选择的选择方法,步骤1,将若干等级的销钉放入设备内不同物料盒中。步骤2,根据选销逻辑的初始销号压机进行压销动作,对压机的五个监控窗口的位移监控阈值与力监控阈值进行监控,如果过程判定合格,则工序作业结束,如果过程判定不合格,则继续进行步骤3。步骤3,设备进行推销,将产品内的销钉压出,根据选销逻辑,设备自动更换销号后,返回步骤2。本发明与现有技术相比,设计了用于驱动单元多种销等级选择的选择方法,通过五个监控窗口的位移监控阈值与力监控阈值,实现销等级选择判断,提高了产品的合格率。(The invention relates to the technical field of automobile steering system assembly, in particular to a selection method for selecting multiple pin grades of a driving unit, and the method comprises the step 1 of placing pins of a plurality of grades into different material boxes in equipment. And 2, performing pin pressing action on the press according to the initial pin number of the pin selection logic, monitoring displacement monitoring thresholds and force monitoring thresholds of five monitoring windows of the press, finishing the working procedure if the process is judged to be qualified, and continuing to perform the step 3 if the process is judged to be unqualified. And 3, the equipment carries out sales promotion to press out the pins in the product, and returns to the step 2 after the equipment automatically changes the pin number according to the pin selection logic. Compared with the prior art, the invention designs a selection method for selecting various pin grades of the driving unit, realizes pin grade selection judgment through the displacement monitoring threshold and the force monitoring threshold of the five monitoring windows, and improves the qualification rate of products.)

1. A method for selecting among a plurality of pin levels for a drive unit, comprising:

the method comprises the following steps: step 1, putting pins of a plurality of grades into different material boxes in equipment; step 2, performing pin pressing action on the press according to the initial pin number of the pin selection logic, monitoring displacement monitoring thresholds and force monitoring thresholds of five monitoring windows of the press, finishing the working procedure if the process is judged to be qualified, and continuing to perform step 3 if the process is judged to be unqualified; step 3, the equipment pushes pins out of the product, and returns to the step 2 after the equipment automatically changes pin numbers according to the pin selection logic; the selecting and selling logic is a method for selecting selling grades according to the parameter judgment conditions of the five monitoring windows, and the selecting and selling logic specifically comprises the following steps: step 2a, judging whether the five monitoring windows are qualified according to the press-in force curve or the displacement curve: the five monitoring windows comprise a pin selecting window (01), a force monitoring window (02), a final displacement monitoring window (03), a front end monitoring window (04) and an auxiliary pin selecting window (05), the pin selecting window (01) is arranged right above the auxiliary pin selecting window (05), the pin selecting window (01) is used for judging the pin pressing state, and the pressing force curve or the displacement curve enters and exits from any direction of the pin selecting window (01) and is judged to be qualified; the force monitoring window (02) is arranged at the ending section of the pin pressing process, the force monitoring window (02) is used for monitoring the maximum force in the pin pressing process, a pressing force curve enters from any direction of the force monitoring window (02), and the force monitoring window is judged to be qualified, otherwise, the force monitoring window is judged to be unqualified; the final displacement monitoring window (03) is arranged on the right side of the force monitoring window (02), the final displacement monitoring window (03) is used for monitoring the final displacement in the pin pressing process, the symmetry degree of a product is ensured, a displacement curve enters from the right side of the final displacement monitoring window (03), and is judged to be qualified, otherwise, the displacement curve is judged to be unqualified; the front end monitoring window (04) is arranged at the beginning stage of the pin pressing process, the front end monitoring window (04) is used for front end monitoring, a pressing force curve or a displacement curve enters from the left side of the front end monitoring window (04) and exits from the right side of the front end monitoring window (04), and the front end monitoring window is judged to be qualified, otherwise, the front end monitoring window is judged to be unqualified; the auxiliary pin selecting window (05) is arranged on the right side of the front end monitoring window (04) and is positioned right below the pin selecting window (01), the auxiliary pin selecting window (05) is used for assisting in judging the pin pressing state, the pressing force curve or the displacement curve does not enter the auxiliary pin selecting window (05), and the auxiliary pin selecting window is judged to be qualified, otherwise, the auxiliary pin selecting window is judged to be unqualified; a 13.5KN maximum force judgment line penetrates through the force monitoring window (02) and the final displacement monitoring window (03), the 13.5KN maximum force judgment line is used for limiting the maximum force, the press-in force curve does not exceed the 13.5KN maximum force judgment line, and the press-in force curve is judged to be qualified, otherwise, the press-in force curve is judged to be unqualified; and 2b, determining whether the product is qualified according to the judgment result: if the judgment results of the pin selecting window (01), the force monitoring window (02), the final displacement monitoring window (03), the front end monitoring window (04), the auxiliary pin selecting window (05) and the 13.5KN maximum force judgment line are qualified, the product is qualified; if the result of the pin selecting window (01) is unqualified, the force monitoring window (02), the final displacement monitoring window (03), the front end monitoring window (04), the auxiliary pin selecting window (05) and the judgment result of the 13.5KN maximum force judgment line are qualified, and the product is qualified; if the judgment result of the front-end monitoring window (04) is unqualified, the product is unqualified; the judgment result of the force monitoring window (02) is unqualified, and the judgment results of the displacement monitoring window (03) and the front end monitoring window (04) are qualified, so that the product enters rework; finally, if the judgment result of the displacement monitoring window (03) is unqualified and the judgment result of the front-end monitoring window (04) is qualified, the product enters rework; and 2c, feeding back the result of whether the product is qualified and whether the product needs to be reworked to the press.

2. A method for selecting a plurality of pin grade selections for a drive unit according to claim 1, wherein: the displacement monitoring threshold value of the pin selecting window (01) is 168-171.8 mm, and the force value monitoring threshold value is 0.55-5 KN.

3. A method for selecting a plurality of pin grade selections for a drive unit according to claim 1, wherein: the displacement monitoring threshold value of the force monitoring window (02) is 173-174.19 mm, and the force value monitoring threshold value is 1.5-15 KN.

4. A method for selecting a plurality of pin grade selections for a drive unit according to claim 1, wherein: and the displacement monitoring threshold of the final displacement monitoring window (03) is 174.19-174.59 mm, and the force value monitoring threshold is-0.2-15 KN.

5. A method for selecting a plurality of pin grade selections for a drive unit according to claim 1, wherein: the displacement monitoring threshold value of the front end monitoring window (04) is 158.61-165.81 mm, and the force value monitoring threshold value is-0.2-5 KN.

6. A method for selecting a plurality of pin grade selections for a drive unit according to claim 1, wherein: the displacement monitoring threshold value of the auxiliary pin selecting window (05) is 168-171.8 mm, and the force value monitoring threshold value is-0.2-0.55 KN.

7. A method for selecting a plurality of pin grade selections for a drive unit according to claim 1, wherein: the number of promotion times is more than or equal to 2, and the sale of the next product is reduced by one level; if the number of sales promotion times is less than 2, the entering state of the selecting and selling window (01) or the auxiliary selecting and selling window (05) is checked, and the next product sales grade is determined.

8. A method for selecting a plurality of pin grade selections for a drive unit according to claim 1, wherein: and the final displacement monitoring window (03) and the front end monitoring window (04) are unqualified, the press returns to the original point, and the next product is selected from the initial pin grade.

9. A method for selecting a plurality of pin grade selections for a drive unit according to claim 1, wherein: the judgment result of the force monitoring window (02) is unqualified, and the judgment results of the displacement monitoring window (03) and the front end monitoring window (04) are finally qualified, so that the product enters rework, and if the promotion is successful and has a higher pin grade, the product is pressed again by upgrading the grade; if the promotion is successful but the sales level is not higher than the first-level sales level, the product is unqualified, and the next product is selected from the initial sales level; if the promotion fails, the next product is selected from the initial sales level.

10. A method for selecting a plurality of pin grade selections for a drive unit according to claim 1, wherein: the final displacement monitoring window (03) is unqualified, the front end monitoring window (04) is qualified, the product enters rework, and if the promotion is successful, the pin grade is unchanged or is reduced by one grade for press mounting again; if the promotion fails, the product is not qualified and the next product is selected from the initial marketing grade.

Technical Field

The invention relates to the technical field of automobile steering system assembly, in particular to a selection method for selecting multiple pin grades of a driving unit.

Background

When a driving unit of an automobile steering system is assembled, a drilling and pinning process needs to be carried out on an input shaft and a torsion bar, and the input shaft and the torsion bar are fixed. The connecting short pins for drilling and pinning are divided into 6 grades, the diameter difference of the pins of each grade is 0.005mm, and the pins of the proper grade need to be selected to be matched with the drilling condition of the current equipment. How to clearly and accurately select the pin grade ensures the product quality after press mounting is finished, reduces the pin pressing unqualified rate, reduces the times of checking pins in reverse to accelerate the production rhythm, and improves the production efficiency, which is the key of the current drilling and pin punching process.

The existing selecting and selling logic only has three frames to carry out process judgment, which respectively comprises the following steps: frame one: and monitoring the initial section of the press pin. And a second frame: the process force monitoring is used for monitoring force values and displacement and mainly for monitoring and judging force. And a third frame: and monitoring the final position, monitoring the force value and the displacement, and mainly monitoring and judging the displacement.

However, because the pin pressing process can generate various force and displacement curves, the force value is mainly caused by the interference force between the pin and the pin hole, and the existing pin selecting window cannot meet the requirement, so that the qualification rate is high.

Therefore, the pin selecting method for selecting multiple pin grades of the driving unit, which can solve the problems of disordered pin selecting logic, high reject rate and the like in the prior art, is very necessary.

Disclosure of Invention

The pin selecting method for selecting multiple pin grades of the driving unit breaks through the difficult problems in the prior art, and can solve the problems of disordered pin selecting logic, high reject ratio and the like in the prior art.

In order to achieve the above object, the present invention provides 1. a selection method for selecting a plurality of pin grades for a drive unit, characterized in that: the method comprises the following steps:

step 1, putting pins of a plurality of grades into different material boxes in equipment.

And 2, performing pin pressing action on the press according to the initial pin number of the pin selection logic, monitoring displacement monitoring thresholds and force monitoring thresholds of five monitoring windows of the press, finishing the working procedure if the process is judged to be qualified, and continuing to perform the step 3 if the process is judged to be unqualified.

And 3, the equipment carries out sales promotion to press out the pins in the product, and returns to the step 2 after the equipment automatically changes the pin number according to the pin selection logic.

The selecting and selling logic is a method for selecting selling grades according to the parameter judgment conditions of the five monitoring windows, and the selecting and selling logic specifically comprises the following steps:

step 2a, judging whether the five monitoring windows are qualified according to the press-in force curve or the displacement curve:

the five monitoring windows comprise a pin selecting window, a force monitoring window, a final displacement monitoring window, a front end monitoring window and an auxiliary pin selecting window.

The pin selecting window is arranged right above the auxiliary pin selecting window and used for judging the pin pressing state, and the pressing force curve or the displacement curve enters and exits from any direction of the pin selecting window and is judged to be qualified.

And the force monitoring window is arranged at the ending section of the pin pressing process and is used for monitoring the maximum force in the pin pressing process, the pressing force curve enters from any direction of the force monitoring window, and the pin is judged to be qualified, otherwise, the pin is judged to be unqualified.

And the final displacement monitoring window is arranged on the right side of the force monitoring window and is used for monitoring the final displacement in the pin pressing process, so that the symmetry degree of the product is ensured, a displacement curve enters from the right side of the final displacement monitoring window, and the product is judged to be qualified, otherwise, the product is judged to be unqualified.

The front end monitoring window is arranged at the beginning stage of the pin pressing process, the front end monitoring window is used for front end monitoring, the pressing force curve or the displacement curve is from the left side of the front end monitoring window and from the right side, and the front end monitoring window is judged to be qualified, otherwise, the front end monitoring window is judged to be unqualified.

The auxiliary pin selecting window is arranged on the right side of the front end monitoring window and is located right below the pin selecting window, the auxiliary pin selecting window is used for assisting in judging the pin pressing state, the pressing force curve or the displacement curve does not enter the auxiliary pin selecting window, and the auxiliary pin selecting window is judged to be qualified, otherwise, the auxiliary pin selecting window is judged to be unqualified.

And the 13.5KN maximum force judgment line passes through the force monitoring window and the final displacement monitoring window, the 13.5KN maximum force judgment line is used for limiting the maximum force, the press-in force curve does not exceed the 13.5KN maximum force judgment line, and the judgment is qualified, otherwise, the judgment is unqualified.

And 2b, determining whether the product is qualified according to the judgment result:

and if the judgment results of the pin selecting window, the force monitoring window, the final displacement monitoring window, the front end monitoring window, the auxiliary pin selecting window and the 13.5KN maximum force judgment line are qualified, the product is qualified.

And if the result of the pin selecting window is unqualified, and the judgment results of the force monitoring window, the final displacement monitoring window, the front end monitoring window, the auxiliary pin selecting window and the 13.5KN maximum force judgment line are qualified, the product is qualified.

And if the judgment result of the front-end monitoring window is unqualified, the product is unqualified.

And if the judgment result of the force monitoring window is unqualified, and the judgment results of the final displacement monitoring window and the front end monitoring window are qualified, the product enters rework.

And finally, if the judgment result of the displacement monitoring window is unqualified and the judgment result of the front-end monitoring window is qualified, the product enters rework.

And 2c, feeding back the result of whether the product is qualified and whether the product needs to be reworked to the press.

The displacement monitoring threshold value of the pin selecting window is 168-171.8 mm, and the force value monitoring threshold value is 0.55-5 KN.

The displacement monitoring threshold value of the force monitoring window is 173-174.19 mm, and the force value monitoring threshold value is 1.5-15 KN.

The displacement monitoring threshold of the final displacement monitoring window is 174.19-174.59 mm, and the force value monitoring threshold is-0.2-15 KN.

The displacement monitoring threshold value of the front end monitoring window is 158.61-165.81 mm, and the force value monitoring threshold value is-0.2-5 KN.

The displacement monitoring threshold value of the auxiliary pin selecting window is 168-171.8 mm, and the force value monitoring threshold value is-0.2-0.55 KN.

The number of promotion times is more than or equal to 2, and the sale of the next product is reduced by one level; if the number of sales promotion times is less than 2, the entering state of the pin selecting window or the auxiliary pin selecting window is checked, and the next product sales grade is determined.

And judging results of the final displacement monitoring window and the front end monitoring window are unqualified, returning the press to the original point, and selecting the next product from the initial pin grade.

The judgment result of the force monitoring window is unqualified, and the judgment results of the final displacement monitoring window and the front end monitoring window are qualified, so that the product enters rework, and if the promotion is successful and the promotion has a higher pin grade, the product is pressed again by upgrading the grade; if the promotion is successful but the sales level is not higher than the first-level sales level, the product is unqualified, and the next product is selected from the initial sales level; if the promotion fails, the next product is selected from the initial sales level.

The final judgment result of the displacement monitoring window is unqualified, the judgment result of the front-end monitoring window is qualified, the product enters rework, and if the promotion is successful, the pin grade is unchanged or is reduced by one grade for press mounting again; if the promotion fails, the product is not qualified and the next product is selected from the initial marketing grade.

Compared with the prior art, the invention designs a selection method for selecting various pin grades of the driving unit, realizes pin grade selection judgment through the displacement monitoring threshold and the force monitoring threshold of the five monitoring windows, and improves the qualification rate of products.

Drawings

Fig. 1 is a schematic view of the position of a monitoring window in the present invention.

FIG. 2 is a flow diagram of the election pinning logic of the present invention.

Detailed Description

The invention is further described with reference to the accompanying drawings.

Referring to fig. 1-2, the present invention provides 1. a selection method for selecting a plurality of pin grades for a drive unit, comprising the following steps:

step 1, putting pins of a plurality of grades into different material boxes in equipment.

And 2, performing pin pressing action on the press according to the initial pin number of the pin selection logic, monitoring displacement monitoring thresholds and force monitoring thresholds of five monitoring windows of the press, finishing the working procedure if the process is judged to be qualified, and continuing to perform the step 3 if the process is judged to be unqualified.

And 3, the equipment carries out sales promotion to press out the pins in the product, and returns to the step 2 after the equipment automatically changes the pin number according to the pin selection logic.

The selecting and selling logic is a method for selecting selling grades according to the parameter judgment conditions of the five monitoring windows, and specifically comprises the following steps:

step 2a, judging whether the five monitoring windows are qualified according to the press-in force curve or the displacement curve:

the five monitoring windows comprise a pin selecting window 01, a force monitoring window 02, a final displacement monitoring window 03, a front end monitoring window 04 and an auxiliary pin selecting window 05.

The pin selecting window 01 is arranged right above the auxiliary pin selecting window 05, the pin selecting window 01 is used for judging the pin pressing state, and the pressing force curve or the displacement curve enters and exits from any direction of the pin selecting window 01 and is judged to be qualified.

The force monitoring window 02 is arranged at the ending section of the pin pressing process, the force monitoring window 02 is used for monitoring the maximum force in the pin pressing process, the pressing force curve enters from any direction of the force monitoring window 02, and the pin pressing process is judged to be qualified, otherwise, the pin pressing process is judged to be unqualified.

The final displacement monitoring window 03 is arranged on the right side of the force monitoring window 02, the final displacement monitoring window 03 is used for monitoring the final displacement in the pin pressing process, the product symmetry degree is guaranteed, a displacement curve enters from the right side of the final displacement monitoring window 03, the final displacement monitoring window is judged to be qualified, and otherwise, the final displacement monitoring window is judged to be unqualified.

The front end monitoring window 04 is arranged at the beginning stage of the pin pressing process, the front end monitoring window 04 is used for front end monitoring, a pressing force curve or a displacement curve is from the left side of the front end monitoring window 04 and from the right side, and the front end monitoring window 04 is judged to be qualified, otherwise, the front end monitoring window 04 is judged to be unqualified.

The auxiliary pin selecting window 05 is arranged on the right side of the front end monitoring window 04 and is located right below the pin selecting window 01, the auxiliary pin selecting window 05 is used for assisting in judging the pin pressing state, the pressing force curve or the displacement curve does not enter the auxiliary pin selecting window 05, the pin is judged to be qualified, and otherwise, the pin is judged to be unqualified.

And the 13.5KN maximum force judgment line passes through the force monitoring window 02 and the final displacement monitoring window 03, the 13.5KN maximum force judgment line is used for limiting the maximum force, the press-in force curve does not exceed the 13.5KN maximum force judgment line, and the press-in force curve is judged to be qualified, otherwise, the press-in force curve is judged to be unqualified.

And 2b, determining whether the product is qualified according to the judgment result:

and if the judgment results of the pin selecting window 01, the force monitoring window 02, the final displacement monitoring window 03, the front end monitoring window 04, the auxiliary pin selecting window 05 and the 13.5KN maximum force judgment line are qualified, the product is qualified. The products are unqualified and need to be promoted, the promotion frequency is more than or equal to 2, and the next product is sold by one level; if the number of sales promotion times is less than 2, the entering state of the selecting and selling window 01 or the auxiliary selecting and selling window 05 is checked, and the next product sales grade is determined.

And if the result of the pin selecting window 01 is unqualified, and the judgment results of the force monitoring window 02, the final displacement monitoring window 03, the front end monitoring window 04, the auxiliary pin selecting window 05 and the 13.5KN maximum force judgment line are qualified, the product is qualified. The products are unqualified and need to be promoted, the promotion frequency is more than or equal to 2, and the next product is sold by one level; if the number of sales promotion times is less than 2, the entering state of the selecting and selling window 01 or the auxiliary selecting and selling window 05 is checked, and the next product sales grade is determined.

If the judgment result of the front-end monitoring window 04 is unqualified, the product is unqualified; the press returns to the origin and the next product is selected starting from the initial pin grade.

And if the judgment result of the force monitoring window 02 is unqualified, and the judgment results of the displacement monitoring window 03 and the front end monitoring window 04 are qualified, the product enters rework. If the promotion is successful and the grade is higher than the grade of the first-grade pin, the first-grade pin is upgraded and the press mounting is carried out again; if the promotion is successful but the sales level is not higher than the first-level sales level, the product is unqualified, and the next product is selected from the initial sales level; if the promotion fails, the next product is selected from the initial sales level.

And finally, if the judgment result of the displacement monitoring window 03 is unqualified and the judgment result of the front-end monitoring window 04 is qualified, the product enters rework. If the promotion is successful, the pin grade is unchanged or is reduced by one grade for press mounting again; if the promotion fails, the product is not qualified and the next product is selected from the initial marketing grade.

And 2c, feeding back the result of whether the product is qualified and whether the product needs to be reworked to the press.

In the invention, the displacement monitoring threshold of the pin selecting window 01 is 168-171.8 mm, and the force value monitoring threshold is 0.55-5 KN. The displacement monitoring threshold value of the force monitoring window 02 is 173-174.19 mm, and the force value monitoring threshold value is 1.5-15 KN. And finally, the displacement monitoring threshold value of the 03 displacement monitoring window is 174.19-174.59 mm, and the force value monitoring threshold value is-0.2-15 KN. The front end monitoring window 04 displacement monitoring threshold is 158.61-165.81 mm, and the force value monitoring threshold is-0.2-5 KN. The displacement monitoring threshold value of the auxiliary pin selecting window 05 is 168-171.8 mm, and the force value monitoring threshold value is-0.2-0.55 KN.