CN2133403Y

CN2133403Y - Controlled moment of torque tight-fitting machine

Info

Publication number: CN2133403Y
Application number: CN 92233844
Authority: CN
Inventors: 张晓明; 张震; 郁敬
Original assignee: DONGFANG GAS ENGINEERING AND TECHNOLOGICAL DEVEL Co TIANJIN
Current assignee: DONGFANG GAS ENGINEERING AND TECHNOLOGICAL DEVEL Co TIANJIN
Priority date: 1992-09-25
Filing date: 1992-09-25
Publication date: 1993-05-19
Anticipated expiration: 2002-09-25

Abstract

The utility model relates to a controlled moment of torque tight-fitting machine, which comprises a torsion force measuring device, an auxiliary driving mechanism, a driving mechanism, a clamping device and a torque controlling device. The work piece is installed on the clamping device and is tightly screwed by the auxiliary driving mechanism and the driving mechanism. When the screw acting force of the work piece achieves a predetermined value, the straining signal is passed to the torque controlling device to make an electric machine shut down by the torsion force measuring device. The utility model is convenient operation. An electrical resistance strain gage torque sensor and a large scale integrated circuit sheet are designed, and thus the controlled moment of torque tight-fitting machine has high measuring precision.

Description

Controlled moment of torque tight-fitting machine

The utility model relates to the tight part device that moment of torsion control sensor is housed that a kind of fastening workpiece is used.

Tight-fitting machine is the device that the most frequently used a kind of fastening workpiece is used in mechanism's processing.The power set of existing tight-fitting machine are motor, and its course of work is: starter motor rotates it by the belt pulley transmission speed reducer, and the reductor of rotation drives anchor clamps again and rotates, thereby reaches the purpose of fastening workpiece.Mechanical system is then adopted in the control of moment of torsion, that is to say, controls the size of torsion by pin chain, spring support and position switch.When workpiece is fastening, along with moment of torsion increases, the motor driving-belt is tightened up on one side, at this moment the motor body can rotate, make the lever that is connected with the motor body produce displacement, and, make motor out of service with this driving power switch, reach the purpose of control torque thus, the big I that changes moment of torsion realizes by adjusting the spring tension that is connected with body.Existing tight-fitting machine, because the mechanism of control torque size adopts mechanical device, therefore its moment of torsion control accuracy will be subjected to the influence of each mechanical part undoubtedly, the stability of spring tension for example, the bearing friction of the variation of driving-belt pulling force and support motor etc. all can influence the control accuracy of workpiece moment of torsion, so its stability and poor reliability, the workpiece torque is uncontrollable substantially.

The purpose of this utility model provides a kind of moment of torsion control accuracy height, and the torque control device of the band microcomputer of good reliability is so that improve the quality of products.

For this reason, the utility model adopts following technical scheme: it is made up of torsion measurement mechanism, auxiliary drive gear, transmission mechanism, grip device and torque control device.Above-mentioned torsion measurement mechanism comprises axle 32, casing 33, strain bar 1, foil gauge 35, spring support 36 and spring 37, wherein go up axle 32 levels and be positioned at casing 33 tops, the one end links to each other with vertical shape strain bar 1 upper end, the other end is connected with spring 37 1 ends, spring 37 is positioned on the spring support 36, and foil gauge 35 is fixed on strain bar 1 outside.Above-mentioned auxiliary drive gear 2 is made up of tooth bar 2, gear 3, pulley bracket 4, pulley 6, pulley spindle 7, weight line 8, gear shaft 9, weight guide rail 10, weight 11, pedestal 31 and handle 40, tooth bar 2 is fixed in the casing 33 and with gear 3 and meshes, after gear shaft 9 passes gear 3 centers, the one end passes outside the pedestal 31 and with handle 40 and links to each other, weight line 8 one ends are fixed on the tooth bar 2 by pulley gear, and the other end is connected with weight 11.Above-mentioned transmission mechanism comprises motor 12, spring 18, small pulley 20, big belt wheel 24, belt 22, reductor 25, small pulley 22 is fixed in motor 12 rotating shafts, big belt wheel 24 is connected with the power shaft of reductor 25, and small pulley 22 carries out transmission with big belt wheel 24 by belt 22.Grip device by mold base 28, mold 30, go up axle 32 and form, mold 30 is positioned on the mold base 28, and can rotate to an angle on mold base 28 surfaces, vertically on the shape spools 32 be positioned at mold 30 directly over.Torque control device is by resistance-strain type torque sensor I, the amplifier II, the A/D converter III, torque setting switch IV, the decoding monitor V, the logic circuit VI, executing agency's VII and transformation rectification circuit VIII are formed, torque setting switch IV is provided with earlier, after workpiece is subjected to torsion, the torque sensor I is sent the torsion signal that senses into the amplifier II and is amplified, the output decoded signal is deciphered demonstration in the decoding monitor IV after the A/D converter conversion again, and the decoding monitor V is high to the output of logic circuit IV by torque setting switch IV, low level and make logic circuit IV output voltage V ₀To executing agency's VII, so that its control motor 12 break-makes.

4 resistance R in the above-mentioned torque sensor I ₁～R ₄Form bridge rectifier.The amplifier II is by transport and placing device IC1 potentiometer W ₁, W ₂And subsidiary component constitutes.The A/D converter III comprises A/D converter ic sheet IC ₂And subsidiary component.The decoding monitor V is by decoder ic sheet IC ₃, show integrated circuit chip IC ₄, IC ₅Resistor network R8～R14 and common cathode charactron LED and subsidiary component are formed,

IC

₃10,13,12,11 meet IC respectively ₄7,1,2,6 pin,

IC

₄13,12,11,10,9,15,14 pin respectively by resistor network R ₈～R ₁₄In corresponding resistance meet copolar charactron LED, LED again with IC ₅Link to each other IC ₃,

IC

₄12,2 pin all and IC ₅Polarity negative sign control end connect.Torque setting switch IV comprises two groups of switches, and it is K～K that every group of switch includes 10 switches ₁And K '～K ₁'.The logic circuit VI is by NAND gate YF ₁～YF ₃, not gate F ₁, F ₂Nor gate HF, diode D ₁～D ₃Form YF with subsidiary component ₁, YF ₂Output is pressed HF, and the HF output is through D ₁Output voltage V 0, F ₁Output is through YF ₃Meet F ₂, and F ₂Through D ₃Connect the HF output.Executing agency's VII comprises relay J ₁, J ₂, J ₃, triode BG ₁, BG ₂, diode D ₄, D ₅, button switch K ₁, K ₂, K ₃And subsidiary component is formed BG ₁, BG ₂And subsidiary component is formed amplifying circuit and J ₁Coil links to each other, and J ₂, J ₃The coil two ends connect the 220V AC power respectively.Transformation rectification circuit VIII is by transformer T, bridge rectifier D, integrated circuit chip IC ₆, IC ₇, diode D ₆, D ₇And subsidiary component forms, and the 220V alternating current is pressed onto two inputs of D through transformer T output DC, two outputs of D respectively with IC ₆, IC ₇Input 1,2 pin connect IC ₆, IC ₇Output i.e. 3 pin, respectively output+5V and-5V voltage.The input of transformer rectifier circuit VIII output termination torque sensor I, amplifier integrated circuit chip IC ₁Output termination A/D converter III in IC ₂Input 3 pin, IC ₂20～23 pin respectively with the decoding monitor IV in

IC

₃10,13,12,11 pin and

IC

₄7,1,2,6 pin connect

IC

₃3,14,2,15,1,6,7,4,9,5 pin respectively with torque setting switch V in two groups of K switch ₀～K ₉, K ₀'～K ₉' link to each other, torque setting switch V again with the NAND gate YF of logic circuit VI ₁, YF ₂Input connects, and the voltage V0 of its output supplies with executing agency's VII.

The utility model course of work is as described below:

At first workpiece is put on the mold 30, adjust the angle of mold 30, can make the workpiece screwing align fastening the remove hole of axle on 32, rotary handle 40, gear shaft 9 is rotated, thereby gear 10 also rotates thereupon and drives tooth bar 2 rotations, causes casing 33 to move down, so that the borehole jack of removing on the axle 32 is gone on the workpiece.At this moment, starter motor 12 drives reductor 25 and rotates by small pulley 20, belt 22, big belt wheel 24, and reductor 25 output shafts drive mold 30 by mold base 28 and workpiece rotates, and reach the purpose of fastening workpiece.When workpiece screwed active force and reaches predetermined value, last axle 32 rotated and makes 1 distortion of strain bar, spreads out of strain signal as the foil gauge 35 of sensor motor 12 cuts out.37 percussions that reduce strain bar 1 of spring.

5～Figure 12 the explanation in conjunction with the accompanying drawings of the operation principle of its torque control device:

By integrated circuit chip IC ₁, potentiometer W ₁, W ₂And C ₁, C ₂, C ₃Send in the A/D converter III after amplifying Deng the signal of telecommunication that constitutes, be input to IC in the decoding monitor IV respectively by the decoded signal of its output from steady zero line amplifier II transmits the sensor I ₃, IC ₄, IC ₃Adopt 4,028 ten sections decoder ic sheets, be used for torque setting.Suppose that torque setting switch V is set in K ₃, K ₄On, the stressed back of workpiece outputting torsion signal passes to the sensor I, makes it produce corresponding mV step voltage, is input to the A/D converter III, IC after the amplifier II is amplified ₂Adopt 14433 integrated circuit chips, 8421 yards IC that send into the decoding monitor IV of output ₃(adopting 4028 integrated circuit chips), the signal of telecommunication of sensor I output be owing to the suffered torsion of workpiece changes, when the decoding monitor IV is shown as 340, and IC ₃15 pin and 1 pin be high level, and make two NAND gate YF in the logic circuit VI ₁, YF ₂Be low level, nor gate HF output this moment high level, and drive relay in executing agency's VII with this.

In the course of the work, at first to determine to be assembled workpiece required moment of torsion (can in technical papers, find) when fastening, and in this device, set,, motor 12 cut out automatically by executing agency's VII when work is screwed when reaching the moment of torsion that sets.

The utility model is rational in infrastructure, owing to be provided with auxiliary drive gear (manually) and transmission mechanism (electronic), so easy to operate.Since designed resistance should pretty torque sensor as sensing element and the large scale integrated circuit sheet of moment of torsion control, realized that the high accuracy of moment of torsion detects and control, the reliability height, thereby guaranteed the quality of workpiece.

Fig. 1 is the structural representation of the utility model mechanical part.

Fig. 2 is the A-A cutaway view at position shown in Figure 1.

Fig. 3 is the B-B cutaway view at position shown in Figure 1.

Fig. 4 is that the K at position shown in Figure 1 is to view.

Fig. 5, Fig. 6 are the transmission principle schematic diagram.

Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11, Figure 12, Figure 13 are the utility model electrical schematic diagram.

Casing 33 is connected with pedestal 31 usefulness dovetail grooves, and gear 3 is fixedly supported on the pedestal 31 with gear shaft 9 usefulness pins 38.Turning handle 40 is by making gear 3 and cooperating of tooth bar 2 casing 33 upper and lower moving.The hammer 11 that hangs down is the counterweights as casing 33.Motor 12 is fixed on the fixed head 14 by screwing tight nail 15, can be along the sliding limit of the electric machine support 13 left and right (adjustment screw 16 that moves of fixed head 14, because the active force of spring 18 can make motor 12 move left and right, thereby the degree of tightness small pulley 20 usefulness keys 19 that can adjust belt 22 are fixed in motor 12 rotating shafts, and big 24 of belt wheels are fixed on by key 23 on the power shaft of reductor 25.Reductor 25 usefulness screws 26 are installed on the pedestal 31.Reductor 25 output shafts are connected with mold base 28 by key 29.Mold 30 can rotate to an angle along the keyway direction on the mold base 28.Pulley gear is made up of pulley 6 and pulley spindle 7.

IC ₁～IC ₇Adopt 7650,14431,428,4511 respectively, 5G1413, W7805, W7905 integrated circuit chip;

YF ₁Be 4011, YF is 4002;

BG ₁：3DK2、BG ₂：3DD15；

W ₁～W ₅Be respectively 100K, 100K, 100K, 1K, 100K;

R ₅～R ₈Resistance is respectively 1K, 1K, 470K, 220K;

R ₉～ ₁₅Be 560 Ω, R ₁₆, R ₁₇Be respectively 1. ' 1K, 2.2K, R ₁～R ₄Be 2.2K.

C ₁～C ₁₄Electric capacity is respectively 0.01 μ, 0.01 μ, 0.01 μ, 0.01 μ, 0.33 μ, 0.1 μ, 0.1,0.1 μ, 2200 μ/25V, 2200 μ/25V, 0.33 μ, 22 μ, 0.1 μ, 1 μ.

Claims

1, a kind of controllable torque formula tight-fitting machine, it is characterized in that it being by the torsion measurement mechanism, auxiliary drive gear, transmission mechanism, grip device and torque control device are formed, described torsion measurement mechanism comprises axle 32, casing 33, strain bar 1, foil gauge 35, spring support 36 and spring 37, wherein go up axle 32 levels and be positioned at casing 33 tops, the one end links to each other with vertical shape strain bar 1 upper end, the other end is connected with spring 37 1 ends, spring 37 is positioned on the spring support 36, foil gauge 35 is fixed on strain bar 1 outside, described auxiliary drive gear 2 is by tooth bar 2, gear 3, pulley bracket 4, pulley 6, pulley spindle 7, weight line 8, gear shaft 9, weight guide rail 10, weight 11, pedestal 31 and handle 40 are formed, tooth bar 2 is fixed in the casing 33 and with gear 3 and meshes, after gear shaft 9 passes gear 3 centers, the one end passes outside the pedestal 31 and with handle 40 and links to each other, weight line 8 one ends are fixed on the tooth bar 2 by pulley gear, the other end is connected with weight 11, described transmission mechanism comprises motor 12, spring 18, small pulley 20, big belt wheel 24, belt 22, reductor 25, small pulley 22 is fixed in motor 12 rotating shafts, big belt wheel 24 is connected with the power shaft of reductor 25, small pulley 22 carries out transmission with big belt wheel 24 by belt 22, described grip device is by mold base 28, mold 30, last axle 32 is formed, mold 30 is positioned on the mold base 28, and can rotate to an angle on mold base 28 surfaces, vertically on the shape axle 32 be positioned at mold 30 directly over, described torque control device is by resistance-strain type torque sensor I, the amplifier II, the A/D converter III, torque setting switch IV, decoding monitor V, logic circuit VI executing agency's VII and transformation rectification circuit VIII are formed, torque setting switch IV is provided with earlier, after workpiece is subjected to torsion, torque sensor I sends the torsion signal that senses into the amplifier II and amplifies, the output decoded signal is deciphered demonstration in the decoding monitor IV after the A/D converter conversion again, and the decoding monitor V is high to the output of logic circuit IV by torque setting switch IV, low level and make also output voltage V of logic circuit IV ₀To executing agency's VII, so that its control motor 12 break-makes.

2, controllable torque formula tight-fitting machine according to claim 1 is characterized in that 4 resistance R in the described torque sensor I ₁～R ₄Form bridge rectifier.

3, controllable torque formula tight-fitting machine according to claim 1 is characterized in that described amplifier II is by transport and placing device IC ₁Potentiometer W ₁, W ₂And subsidiary component constitutes.

4, controllable torque formula tight-fitting machine according to claim 1 is characterized in that described A/D converter III comprises A/D converter ic sheet IC ₂And subsidiary component.

5, controllable torque formula tight-fitting machine according to claim 1 is characterized in that described decoding monitor V is by decoder ic sheet IC ₃, show integrated circuit chip IC ₄, IC ₅Resistor network R8～R14 and common cathode charactron LED and subsidiary component are formed, IC ₃10,13,12,11 meet IC respectively ₄7,1,2,6 pin, 13,12,11,10,9,15,14 pin of IC4 are respectively by resistor network R ₈～R ₁₄In corresponding resistance meet copolar charactron LED, LED again with IC ₅Link to each other IC ₃, IC ₄12,2 pin all and IC ₅Polarity negative sign control end connect.

6, controllable torque formula tight-fitting machine according to claim 1 is characterized in that described torque setting switch IV comprises two groups of switches, and it is K that every group of switch includes 10 switches ₀～K ₉And K ₀'～K ₉'.

7, controllable torque formula tight-fitting machine according to claim 1 is characterized in that described logic circuit VI is by NAND gate YF ₁～YF ₃, not gate F ₁, F ₂Nor gate HF, diode D ₁～D ₃Form YF with subsidiary component ₁, YF ₂Output is pressed HF, and the HF output is through D ₁Output voltage V 0, F ₁Output is through YF ₃Meet F ₂, and F ₂Through D ₃Connect the HF output.

8, controllable torque formula tight-fitting machine according to claim 1 is characterized in that described executing agency VII comprises relay J ₁, J ₂, J ₃Triode BG ₁, BG ₂, diode D ₄, D ₅, button switch K ₁, K ₂, K ₃And subsidiary component is formed BG ₁, BG ₂And subsidiary component composition amplifying circuit meets J ₁Coil, and J ₂, J ₃The coil two ends connect the 220V AC power respectively.

9, controllable torque formula tight-fitting machine according to claim 1 is characterized in that described transformation rectification circuit VIII is by transformer T, bridge rectifier D, integrated circuit chip IC ₆, IC ₇, diode D ₆, D ₇And subsidiary component forms, and the 220V alternating current is pressed onto two inputs of D through transformer T output DC, two outputs of D respectively with IC ₆, IC ₇Input 1,2 pin connect IC ₆, IC ₇Output i.e. 3 pin, respectively output+5V and-5V voltage.

10,, it is characterized in that the input of described transformer rectifier circuit VIII output termination torque sensor I, amplifier integrated circuit chip IC according to claim 2,3,4,5,6,7,8,9 described controllable torque formula tight-fitting machines ₁Output termination A/D converter III in IC ₂Input 3 pin, IC ₂20～23 pin respectively with the decoding monitor IV in IC ₃10,13,12,11 pin and IC ₄7,1,2,6 pin connect IC ₃3,14,2,15,1,6,7,4,9,5 pin respectively with torque setting switch V in two groups of K switch ₀～K ₉, K ₀'～K ₉' link to each other, torque setting switch V again with the NAND gate YF of logic circuit VI ₁, YF ₂Input connects, and the voltage V0 of its output supplies with executing agency's VII.