JPS6146331A - Press fit method of bush - Google Patents
Press fit method of bushInfo
- Publication number
- JPS6146331A JPS6146331A JP16760184A JP16760184A JPS6146331A JP S6146331 A JPS6146331 A JP S6146331A JP 16760184 A JP16760184 A JP 16760184A JP 16760184 A JP16760184 A JP 16760184A JP S6146331 A JPS6146331 A JP S6146331A
- Authority
- JP
- Japan
- Prior art keywords
- press
- bush
- press fit
- fitting
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Assembly (AREA)
- Control Of Presses (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、所定の部品に対してブツシュを圧入する方
法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to a method of press-fitting a bushing into a predetermined part.
従来の技術
従来、この種のブツシュの圧入方法として例えば特願昭
５７−１４８５７３号に係るものが本出願人により提案
されている。2. Description of the Related Art Conventionally, the present applicant has proposed a method for press-fitting bushings of this type, for example, in Japanese Patent Application No. 148573/1983.
この特願昭５７−１４８５７３号にあっては、ブツシュ
の圧入動作を司る圧入シリンダの流体負荷を監視するこ
とによりブツシュの圧入に要する荷重（圧入力）を検出
し、この検出値と基準値とを比較することで圧入力の正
否の判定を行なうことを基本としている。In this Japanese Patent Application No. 57-148573, the load (pressing force) required for press-fitting the bushing is detected by monitoring the fluid load of the press-fitting cylinder that controls the press-fitting operation of the bushing, and this detected value is compared with a reference value. The basic idea is to compare whether the press force is correct or not.
発明が解決しようとする問題点
上記の方法にあっては、圧入アクチュエータとしてシリ
ンダを用い、この圧入シリンダの流体圧負荷をもって圧
入刃金監視しているため、圧入速度が一定している保証
がなく、ブツシュのはめ合い誤差によっては圧入速度が
ばらつくことがある。Problems to be Solved by the Invention In the above method, a cylinder is used as the press-fitting actuator, and the press-fitting blade is monitored based on the fluid pressure load of the press-fitting cylinder, so there is no guarantee that the press-fitting speed is constant. The press-fitting speed may vary depending on the fitting error of the bushing.
その結果、圧入条件が変化して判定結果の信頼性低下の
一因となるほか、サイクルタイムが長くなる。As a result, the press-fitting conditions change, which not only causes a decrease in the reliability of the determination results but also lengthens the cycle time.
本発明に、上記の不具合を解消したブツシュの圧入方法
を提供しょうとするものである。The present invention aims to provide a method for press-fitting a bushing that eliminates the above-mentioned problems.
問題点全解決するための手段
本発明においては、圧入アクチュエータとして速屁制御
サーボモータ駆動方式を採用し、サーボモータの負荷電
流を監視するとともに、この負荷電ｍｋ圧入時間との間
で積分し、この積分値をもって圧入力の判定を行なう方
法とする。Means for Solving All Problems In the present invention, a fast fart control servo motor drive method is adopted as the press-fit actuator, and the load current of the servo motor is monitored, and this load current is integrated between mk and press-fit time, The method is to use this integral value to determine the press force.
作用
この方法によれば、圧入速度が安定し、信頼性の高い圧
入力判定結果が得られる。Effect: According to this method, the press-in speed is stabilized and highly reliable press-in force determination results can be obtained.
実施例
第１図は本発明方法の一実施例を説明するための図で、
Ｂはブツシュ、ＷにブツシュＢが圧入される被組付部品
である。ブツシュＢＨ圧入バー１の先端に保持され、他
方、被組付部品Ｗは治具Ｇに位置決め固定されている。Embodiment FIG. 1 is a diagram for explaining an embodiment of the method of the present invention.
B is a bushing, and W is an assembled part into which bushing B is press-fitted. The bush BH is held at the tip of the press-fitting bar 1, while the part to be assembled W is positioned and fixed to a jig G.
圧入バー１はボールスクリュー、シャフト２に螺合して
おり、サーボモー４１３のはたらきによりボールスクリ
ュー、シャフト２が回転駆動されることで前後進してブ
ックｓ−Ｂ ｔ−被組付部品Ｗに圧入する。The press-fitting bar 1 is screwed onto a ball screw and shaft 2, and as the ball screw and shaft 2 are rotationally driven by the action of the servo motor 413, it moves back and forth and is press-fitted into the assembled part W. do.
サーボモ−４１３は速度検出器としてのタコジェネレー
タ４１ｒ：備えておシ、このタコジェネレータ４の出力
に基づき制御架ｆｌ！５によシ定速制御される。この制
御装置５は図示するように設定器６゜速度増幅器７．電
流増幅器８．［流制限器９を備える。そして、端子１０
から積分回路１１にサーボモータ３の負荷電流Ｉｇとり
込むとともに、圧入時間ｔｘ（第２図）との間で積分し
、この積分値を比較回路１２において基壇値と比較する
ことによシプッシュ圧入力の正否の判定を行なう。The servo motor 413 is equipped with a tacho generator 41r as a speed detector, and a control frame fl! is provided based on the output of the tacho generator 4! 5, the speed is controlled at constant speed. This control device 5 includes a setting device 6, a speed amplifier 7, and a speed amplifier 7, as shown in the figure. Current amplifier8. [Includes flow restrictor 9] And terminal 10
The load current Ig of the servo motor 3 is taken into the integrating circuit 11 from 100 to 1000, and it is integrated between the press-fit time tx (Fig. 2), and this integrated value is compared with the base value in the comparator circuit 12 to input the push pressure. Determine whether the is correct or not.
ｆｌｔ）Ｓ、本実施例においては、第２図にも示すよう
に、外部から前進指令を入力し、ブツシュＢを保持して
いる圧入バー１金、設定器６によって設定された量だけ
定速にて前進させる。そして、圧入バー１は、ブツシュ
Ｂが被組付部品Ｗに圧入されはじめてもなおも定速にて
前進し、ブツシュＢが被組付部品Ｗに完全に圧入される
前進限位置で停止する。flt)S, In this embodiment, as shown in FIG. 2, a forward command is input from the outside, and the press-fit bar holding the bushing B moves at a constant speed by the amount set by the setting device 6. advance. The press-fitting bar 1 continues to move forward at a constant speed even when the bushing B begins to be press-fitted into the part W to be assembled, and stops at the forward limit position where the bushing B is completely press-fitted into the part W to be assembled.
このブツシュＢの正大過程において、サーボモー４３の
負荷電流工ｔ−積分回路１１にとシ込み、積分時間指令
を待つてこの負荷電施工を圧入に要しｔ時間ｔ１との間
で積分する。りまり、！２図の斜線部分の面積を求め、
これに定数Ｋｔ−乗じてブツシュ圧入力を仕事量として
求める。そして、この演算値を比較回路１２に入力して
基準値と比較し、基準値に達していれば正常と判定し、
そうでない場合は異常と判定する。During the normalization process of the bush B, the load current is inserted into the t-integrator circuit 11 of the servo motor 43, and the load current is integrated between time t and t1 required for press-fitting, waiting for an integration time command. Rimari! Find the area of the shaded part in Figure 2,
This is multiplied by a constant Kt to obtain the bushing pressure input as the amount of work. Then, this calculated value is input to the comparison circuit 12 and compared with the reference value, and if it reaches the reference value, it is determined to be normal.
If not, it is determined to be abnormal.
一方、負荷電施工が電流制限値いっばいまで流れ、かつ
タイマーＣ８１図では図示省略しである）設定時間ｔ２
がタイムアツプするまでに圧入バー１か・前進限（圧入
限）位置に達しないと、圧入力か大きすぎるものとして
異常と判定する。On the other hand, the load power construction continues until the current limit value reaches the current limit value, and the timer C81 (not shown in the diagram) is set for a set time t2.
If the press-fit bar 1 does not reach the forward limit (press-fit limit) position by the time the press-fit bar 1 times up, the press-fit force is determined to be too large and an abnormality is determined.
こうして、ブツシュ圧入力に関する判定結果が ′得
られたのち、後退指令を入力することにより圧入バー１
が後退する。In this way, after the judgment result regarding the bushing pressure input is obtained, the press-fitting bar 1 is moved by inputting a retreat command.
retreats.
発明の効果
以上のように本発明によれば、圧入バーを駆動する速度
制御サーボ七−夕の負荷１！流を監視し、この負荷電流
全圧入時間との間で積分しｔ値業もとにしてブツシュ圧
入力の正否の判定を行なう方法としたことによシ、圧入
速度が安定し、信頼性の高い判定結果が得られるほか、
ブツシュが圧入限位置に達するまでは圧入バーが停止し
ない・こととも相俟ってサイクルタイムを短縮化できる
。Effects of the Invention As described above, according to the present invention, the load 1 of the speed control servo Tanabata that drives the press-fitting bar! By monitoring the load current and integrating it with the total press-in time to determine whether the bushing pressure input is correct or not based on the t value, the press-in speed is stable and reliability is improved. In addition to obtaining high judgment results,
Coupled with the fact that the press-fitting bar does not stop until the bushing reaches the press-fitting limit position, cycle time can be shortened.
第１図は本発明方法を用い友ブツシュ圧入装置の一例を
示す説明図、第２図は上記装置の作動状態を説明するた
めのタイミングチャートである。
Ｂ・・・ブツシュ、Ｗ・・・被組付部品、１・・・圧入
バー、３・・・サーボモータ。FIG. 1 is an explanatory view showing an example of a bushing press-fitting device using the method of the present invention, and FIG. 2 is a timing chart for explaining the operating state of the device. B... Bush, W... Parts to be assembled, 1... Press-fit bar, 3... Servo motor.
Claims (1)
ーの圧入動作に基づいて所定の部品にブッシュを圧入す
る方法であって、前記速度制御サーボモータの負荷電流
を監視するとともに、この負荷電流を圧入時間との間で
積分し、この積分値をもとにブッシュの圧入力の判定を
行なうことを特徴とするブッシュの圧入方法。(1) A method of press-fitting a bush into a predetermined part based on the press-fitting operation of a press-fitting bar driven by a speed control servo motor, in which the load current of the speed control servo motor is monitored and this load current is press-fitted. A method for press-fitting a bush, characterized in that the press-fitting force of the bush is determined based on the integrated value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16760184A JPS6146331A (en) | 1984-08-10 | 1984-08-10 | Press fit method of bush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16760184A JPS6146331A (en) | 1984-08-10 | 1984-08-10 | Press fit method of bush |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6146331A true JPS6146331A (en) | 1986-03-06 |
Family
ID=15852790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16760184A Pending JPS6146331A (en) | 1984-08-10 | 1984-08-10 | Press fit method of bush |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6146331A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62297000A (en) * | 1986-04-04 | 1987-12-24 | Janome Denki Kk | Electrically driven press |
| EP0723837A1 (en) * | 1995-01-30 | 1996-07-31 | Western Atlas Inc. | Press |
-
1984
- 1984-08-10 JP JP16760184A patent/JPS6146331A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62297000A (en) * | 1986-04-04 | 1987-12-24 | Janome Denki Kk | Electrically driven press |
| EP0723837A1 (en) * | 1995-01-30 | 1996-07-31 | Western Atlas Inc. | Press |
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