KR200418473Y1 - Digital type torque wrench with vertical double pararell plate torque senser and automation system using thereof - Google Patents

Abstract

The present invention has a head is formed at one end and the other end is formed of a handle and the other end of the body is fastened to the battery; It is inserted into the double parallel plate-like structure in the body, the vertical strain consisting of a strain gauge for the two tensile stress provided on the upper end of the double parallel plate, the two strain stress for the compression stress provided on the bottom of the double parallel plate A torque sensor having a double parallel plate structure; An overload circuit breaker that detects a displacement greater than a design capacity inserted into the body and cuts it in advance; A controller for processing the measured torque value of the fastener coupled to the head surrounding the body between one end and the other end of the body; The present invention relates to a digital torque wrench having a torque sensor having a vertical double parallel plate structure, and to a torque measurement data processing automation system using the same.

With the implementation of the present invention, the entire fastening process is digitally systemized from the precise measurement of the clamping force such as bolts and nuts to the history management, the calibration of the mechanical torque wrench, and the determination of repair or replacement. The conclusion of the inspection process and the management process for the data can be made more precisely and conveniently.

 Torque wrench, torque sensor, converter, memory means

Description

Digital type torque wrench with vertical double parallel plate type torque sensor and automation system for torque measurement data processing using the same

1 is a perspective view of a digital torque wrench according to one embodiment of the present invention;

Figure 2 is a perspective view of the digital torque wrench excluding the controller according to an embodiment of the present invention.

Figure 3 is a side cross-sectional view of the digital torque wrench excluding the controller according to an embodiment of the present invention.

Figure 4 is a plan cross-sectional view of the digital torque wrench excluding the controller according to an embodiment of the present invention.

5 is a perspective view of a digital torque wrench according to another embodiment of the present invention.

Figure 6 is a perspective view of a torque sensor of a double parallel plate structure according to an embodiment of the present invention.

Figure 7 is a perspective view of an automated system using a digital torque wrench having a torque sensor of the dual parallel plate structure according to another embodiment of the present invention.

8 is a front perspective view and a rear perspective view of the converter used in another embodiment of the present invention.

9 is a process chart according to another embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100: digital torque wrench 200: head 300: handle 320: finger fixation stage

380: battery

400: controller 410: controller fastener

430: data output unit

500: Torque sensor 600: Overload breaker

700: converter 720: power adapter

740: Rs-232 communication cable 760: Rs-485 communication cable 770: Clock 780: Alarm sound speaker

800: memory means

S.G1, S.G2: Strain gauges for tension stress

S.G3, S.G4: Strain gauges for compression stress

mX, mY: Interfering torque

mZ: measuring torque

The present invention relates to a fastening management system of a digital torque wrench, and more particularly, to precise assembly of bolts and nuts, and to the connection history and inspection management of the bolts and nuts, to the determination of calibration, repair and replacement of the torque wrench. By digitalizing the entire fastening process automatically, the inspection, management and decision steps for fastening and assembly in various cases are not only simple and convenient, but also the process of fastening and assembly management is carried out on-line automatically. By reducing the assembly time and quality control is accurate and can be operated by a small number of personnel to reduce the overall costs including labor costs to improve the productivity of the digital torque wrench system.

When producing products or structures, such as cars or trains, bolted fastening is widely used in joining members. Bolt fastening is simpler than other joining methods such as welding, riveting, adhesives, etc., and the simple tools make it easy for unskilled workers and easy to follow up.

However, if care is not taken in the work and management, the bolt is released, the fastening method that causes a big problem such as accidental departure of the vehicle wheel during operation. In addition, fasteners such as torque wrenches are deteriorated due to wear and environmental changes, so it is necessary to regularly inspect the torque wrenches and manage the history to determine whether to repair, calibrate, and replace them.

Accuracy measurement of the fastening device is performed by the method of directly measuring the operating torque of the fastening device in operation, and by sampling and releasing the fastening product and then checking the tightening method to estimate the operating torque based on the measured torque value. The two methods can be used to grasp the degree or tendency of wear of the fastening device.

In the past, the results of the accuracy measurement were managed manually by writing them in a management account or directly inputting them to a computer. However, it is very difficult to directly input the test results of various types of fasteners by hand or by computer. It was a cumbersome task that often caused missing or incorrectly written test results.

In addition, it is also cumbersome and complex to manage the inspection history of fasteners to determine whether to repair, calibrate, or replace them, which requires a lot of time and requires a large number of personnel, resulting in increased costs including labor costs and reduced productivity. Compared with the actual utilization was not so high a problem.

In addition, even when the torque is applied in a direction different from the tightening direction of the fastener (for example, perpendicular to the tightening direction), the torque value is measured, and there is a problem that the history is managed as an incorrect inspection result.

In order to solve the above problems, the present invention is to digitally system the entire process up to precise assembly of bolts and nuts, management of tightening history thereof, calibration of mechanical torque wrenches, determination of repair and replacement, and in various cases, In addition to the simple and convenient inspection, management, and decision steps for torque tightening, the entire process is automatically carried out to reduce the inspection time and reduce the overall costs including labor costs. An object of the present invention is to provide a digital torque wrench having a torque sensor having a parallel plate structure and an automated system for processing torque measurement data using the same.

In addition, the present invention has a built-in mechanical structure and electrical circuit of the torque sensor that can eliminate interference torque that can be applied during use, so that only the torque value of the tightening direction of the fastener is attached, so that more accurate tightening history can be achieved. An object of the present invention is to provide a digital torque wrench having a torque sensor having a vertical double parallel plate type structure in which management is performed, and an automated system for processing torque measurement data using the same.

In addition, the present invention provides an instantaneous fact when the data is out of a certain range of the set value, when the calibration period of the torque wrench arrives, or when the torque wrench working time is reached by the alarm device mounted on the converter and operated by the control unit. It is possible to provide a digital torque wrench and a torque measurement data processing automation system having a vertical double parallel plate-type torque sensor that can be effectively handled by the operator and can proceed smoothly without interruption or delay. The purpose.

In order to achieve the above object, the present invention has a head is formed at one end and the other end is formed of a handle and the body is fastened to the inside of the other end; It is inserted into the double parallel plate-like structure in the body, the vertical strain consisting of a strain gauge for the two tensile stress provided on the upper end of the double parallel plate, the two strain stress for the compression stress provided on the bottom of the double parallel plate A torque sensor having a double parallel plate structure; An overload circuit breaker that detects a displacement greater than a design capacity inserted into the body and cuts it in advance; And a controller for processing the measured torque value of the fastener coupled to the head surrounding the body between one end and the other end of the body.

In addition, the present invention, the controller is separated from the body, the data line as a medium to manage the data about the torque wrench, and after measuring the torque value of the fastener to compare the preset torque value to process the data about the torque wrench It is characterized by the configuration.

In another aspect, the present invention, the controller is a data input unit for inputting a bibliographic matter regarding the torque wrench; A logic circuit for processing data related to the degree of torque wrench, history, inspection certificate, etc. by comparing the measured torque value of the fastener coupled with the coupler with a preset torque value; An auxiliary memory for storing bibliographic matters related to the torque wrench input by the data input / output device and data processed by a logic circuit; A display unit which displays the surge information on the torque wrench and the data stored in the auxiliary memory; And a data transmission / reception unit enabling transmission and reception of data with an external device.

In addition, the present invention is characterized in that the data input unit is made of any one of a switch input method, an RF tag input method or a pattern recognition method.

In addition, the present invention is characterized in that the controller is configured to rotate along the body.

In addition, the present invention, the converter is connected to the digital torque wrench via a communication line, the converter for receiving data processed by the digital torque wrench; And memory means connected to the converter by a communication line and storing data transmitted by the converter.

In addition, the present invention, the converter, the function of deleting the data stored in the auxiliary memory of the digital torque wrench and the measurement reference setting value of the digital torque wrench when the data transmitted by the digital torque wrench is normally stored in the memory unit. Characterized in that it further comprises a control unit for performing a function that can be changed.

In addition, the present invention, the converter is an alarm device for notifying the user of the facts when the data processed in the digital torque wrench is out of a certain range of the set value, the calibration period of the torque wrench has arrived or the torque wrench working time Further comprising, the operation of the alarm device is characterized in that the configuration is controlled by the control unit.

In addition, the present invention is characterized in that the converter further comprises an auxiliary memory for storing the data processed by the digital torque wrench.

Hereinafter, the present invention will be described in detail with reference to preferred embodiments of the accompanying drawings.

1 is a perspective view of a digital torque wrench 100 according to an embodiment of the present invention, and FIG. 2 is a perspective view of the digital torque wrench 100 excluding the controller 400 according to an embodiment of the present invention.

The digital torque wrench 100 may store data about a bibliographic matter related to the torque wrench temporarily and store the data temporarily, measure the torque value of the fastener, and compare the torque wrench with a preset reference torque value. Process the data about the fastening history, the head 200 is formed at one end and the other end is the body is formed with the handle 300, the head 200 is coupled to the measured fastener formed at one end of the body, the center of the body The controller 400 is attached to the controller 400 and manages data related to the torque wrench, measures the torque value of the fastener, and then processes the data related to the torque wrench by comparing with the preset torque value.

Handle 300 is formed at the other end of the body, the operator applies a rotational force to the handle 300 to measure the degree of the torque wrench. In the method of measuring the degree of the torque wrench, as described above, the method of directly measuring the operating torque of the fastening device in operation and sampling and releasing the fastening product, and then operating torque through the torque value measured by the tightening method. There is a method of estimating.

The controller 400 compares the measured torque value and the preset torque value of the fastener coupled to the coupler with the data input unit for inputting the bibliographic matters related to the torque wrench, and provides data on the degree, history, and inspection certificate of the torque wrench. A logic circuit to process, an auxiliary memory for storing bibliographic matters related to the torque wrench input by the data input / output device and data processed by the logic circuit, a bibliographic matter for the torque wrench and data stored in the auxiliary memory And a data transmitting / receiving unit enabling transmission and reception of data with an external device.

The data input unit is a place for inputting a bibliographic matter regarding a torque wrench, such as an ID number, an inspection date, and the like, and is input in any one or more of a switch input method, an RF tag input method, and a pattern recognition method.

The switch input method is a method of inputting a bibliographic matter by pressing a touch panel or keypad and the like.

The RF tag input method refers to a method in which the bibliographic details are automatically input by scanning the contents of the parts with the pre- inputted bibliographic details with the RF lead attached to the torque wrench.

The pattern recognition input method is a method in which a torque wrench recognizes a matter concerning an inherent number of a component to be measured by the torque wrench as a patterning, and automatically inputs a surge item by inputting the set pattern number.

The logic circuit processes data input with respect to the torque wrench. The logic circuit receives data input from the data input unit and data measured by the digital torque wrench, and compares and calculates the data to calculate the result.

The data input from the data input unit and the data processed through the logic circuit are stored in the auxiliary memory, displayed on the data display unit, and transmitted to the external device by a transceiver provided with an interface.

In addition, the controller 400 has a high-brightness LED is added so that the operator can shine the measurement unit according to the measurement conditions of the site so that the measurer can easily connect to the fastener.

In addition, the data output unit 440 capable of displaying the data of the controller 400 is configured to rotate along the body so that the measurer can easily check the data, the controller 400 is installed separately from the body The data line can be used as a medium to process data relating to the torque wrench.

3 is a side cross-sectional view of the digital torque wrench 100 except for the controller 400 according to an embodiment of the present invention, and FIG. 4 is a digital torque wrench 100 except for the controller 400 according to an embodiment of the present invention. Figure 6 is a planar cross-sectional view, Figure 6 is a perspective view of a torque sensor 500 of a double parallel plate structure according to an embodiment of the present invention.

Sensing element structure of existing digital torque wrench sensor is composed of single plate type sensor structure and general Wheatstone bridge.

On the contrary, the sensing unit structure of the digital torque sensor 500 of the present invention is a double parallel plate type structure, which has excellent stress concentration and repeatability and excellent torque accuracy compared to the conventional single plate type structure.

In other words, the performance is improved to 0.05% of F.S or more at 0.1% of full scale.

In addition, the vertical biparallel plate type has the same amount of signal output for the same torque and input voltage compared to the single plate type, and the deflection of the sensing part is small (about 1/2 level). It is accommodating and improves safety and durability

In addition, the allowable overload of the existing technology has the advantage of improving from 150% of F.S to 200% of F.S.

The dual parallel plate is placed vertically (gravity direction) and designed to be perpendicular to the direction of torque (Moment Z: mZ) to measure. It is a structure that can be done. That is, since the posture and the operation used by the users of the digital torque wrench are different, it is possible to prevent the torque mY precision from being lowered due to the interference loads mX and mY.

That is, in the structural diagram of a vertical double parallel plate torque sensor, mZ is a measurement torque and mX and mY are interference torques that can act when used. When mX (length direction) interference torque is applied, the longitudinal ends of the double flat plates are diagonally symmetrically twisted and deformed to receive the load. In addition, the strain gauge attached in the bending stress direction does not detect the shear stress because the vertical double beam receives the shear force in the case of the interference torque of mY (vertical direction). The bending stress, which acts less than the shear force, is subject to the same mode of stress (compression or tension) in all four strain gages.

By taking the vertical double parallel plate structure as shown in Figure 6 it can also eliminate the micro-interference load can reduce the cost by improving the accuracy of the product and ease of operation.

In addition, in the implementation of the present invention it can be carried out including an overload stopper (600) in the interior of the body of the digital torque range (100). This overload breaker 600 is a mechanical stopper that can prevent the displacement of the sensing part (deformation) more than the design capacity in advance even if the torque exceeds the elastic limit above the safety factor. It is a device structure that can maintain its function. In other words, the present invention considers the stability and safety of the terms of use more by applying a system that is not applied to the existing conventional technology.

5 is a perspective view of a vertical double parallel plate digital torque wrench 100 according to another embodiment of the present invention.

As shown in FIG. 5, a finger fixing end 320 in which a finger node is fixed to the handle 300 may be further added. That is, the finger fixing end 320 of FIG. 5 is an important part to reduce the torque error by applying a force by holding the handle at the correct center of the handle when holding the torque wrench at the other end. So, in advance, the measurer itself is naturally centered and configured to apply force.

7 is a perspective view of an automation system using a digital torque wrench 100 having a torque sensor 500 of a vertical double parallel plate structure according to another embodiment of the present invention, and FIG. 7 is another embodiment of the present invention. Front and back perspective views of the converter 700 used in the present invention.

Converter 700 used in the implementation of the present invention is to relay the digital torque wrench 100 and the memory means 800, a front perspective view and a rear perspective view of the converter 700 is shown in FIG. It is connected to the transceiver of the digital torque wrench 100, and the connection means includes a data line (RS-485) or a wireless method, a USB cable method. In the embodiment of the present invention converter 700 and the memory means 800 is configured to use the RS-232 communication cable (740). Preferably, it can also be carried out using a USB cable which is widely used recently.

In addition, the control unit (MCU) is mounted in the converter 700, and the data transmitted by the transceiver of the digital torque wrench 100 is normally stored in the memory means 800, the controller 400 of the digital torque wrench By deleting the data stored in the auxiliary memory built in the ()), the convenience of capacity management of the auxiliary memory of the digital torque wrench 100 is added.

In addition, the converter 700 is provided with an alarm sound speaker 780. That is, when the data processed by the digital torque wrench 100 is out of a predetermined range of the set value, the calibration period of the torque wrench has arrived, or when the torque wrench working time is reached, the user is provided with the alarm sound speaker 780. By informing the facts, the operator can respond effectively in advance so that the whole process can proceed smoothly without interruption or delay.

In addition, the converter 700 is provided with a large amount of auxiliary memory to store the data processed by the digital torque wrench 100, the memory means 800 does not work or due to an unexpected situation in the memory means 800 Even if the stored data is lost, the data can be restored without any difficulty, and the process can proceed smoothly.

The memory means 800 stores data transmitted by the converter 700. As shown in FIG. 1, the memory means 800 is preferably a computer, and more preferably, a plurality of computers are connected to a network. desirable

8 is a process chart for checking the degree of the torque wrench through a series of processes and managing the history to determine whether to correct, repair and replace.

The fastening correction system process of the digital torque wrench system according to the embodiment of the present invention is a device selection step of determining the device of the torque wrench of the specification according to the torque value of the fastener, as shown in FIG. After the selection, through the acquisition step of receiving or returning the device after placing the order, the distribution step of distributing according to the use of the workplace after the acquisition of the device, the use step of using the torque wrench in the actual field, and the measured torque value of the fastener. A test step for measuring the degree of fastening of the product to be measured, a management step for classifying and storing the measurement history by item, and determining whether the torque value of the fastening value of the fastening product of the product is passed, and issued a test report and the torque wrench is measured It consists of a decision step of determining whether to repair or calibrate the intended product.

The distinctive and advantageous effects distinguished from the prior art generated by the implementation of the present invention by the above-described configuration are as follows.

First, the whole process from the fastening history management of bolts and nuts, to the calibration of mechanical torque wrenches, to the determination of repair and replacement is systemized digitally, so that inspection and management processes for various types of fastening / assembly Not only is it simple and convenient, but the entire process is automatically performed, which shortens the process time and can be operated by a small number of personnel, thereby reducing productivity including labor costs.

Second, the sensing unit structure of the torque sensor is a vertical double parallel plate type structure so that only the torque value of the tightening direction of the fastener is measured, and thus the interference load (mX, Decreasing torque (mZ) precision due to mY) can be prevented and eliminated, and thus strain gage can be easily attached, thereby reducing manufacturing cost.

Third, the alarm device mounted on the converter and operated by the control unit indicates that the data is out of a certain range of the set value, the time period during which the torque wrench has to be corrected or the torque wrench working time is reached. Immediate notifications allow the operator to respond effectively so that the entire process can run smoothly without interruption or delay.

Claims (9)

A head is formed at one end and the other end is formed with a handle, and the body is fastened to the inside of the other end; It is inserted into the double parallel plate-like structure in the body, the vertical strain consisting of a strain gauge for the two tensile stress provided on the upper end of the double parallel plate, the two strain stress for the compression stress provided on the bottom of the double parallel plate A torque sensor having a double parallel plate structure; An overload circuit breaker for detecting a displacement greater than a design capacity inserted into the body in advance; A controller for processing the measured torque value of the fastener coupled to the head surrounding the body between one end and the other end of the body; Digital torque wrench with a torque sensor of the vertical double parallel plate structure, characterized in that comprising a. The method of claim 1, The controller is separated from the body, and the data line as a medium to manage the data on the torque wrench, the torque value of the fastener is measured and compared with the preset torque value to process the data on the torque wrench configuration features Digital torque wrench with a torque sensor of vertical double parallel plate structure. The method of claim 1 or 2, The controller, A data input unit for inputting a bibliographic item regarding the torque wrench; A logic circuit for processing data related to the degree of torque wrench, history, inspection certificate, etc. by comparing the measured torque value of the fastener coupled with the coupler with a preset torque value; An auxiliary memory for storing bibliographic matters related to the torque wrench input by the data input / output device and data processed by a logic circuit; A display unit which displays the surge information on the torque wrench and the data stored in the auxiliary memory; And, A data transmission / reception unit enabling transmission and reception of data with an external device; Digital torque wrench with a torque sensor of the vertical double parallel plate structure, characterized in that comprising a. The method of claim 3, wherein The data input unit is a digital torque wrench having a torque sensor having a vertical double parallel plate structure, characterized in that the configuration of any one of a switch input method, RF tag input method or pattern recognition method. In claim 3, The controller is a digital torque wrench having a torque sensor of a vertical double parallel plate structure, characterized in that configured to rotate along the body. In claim 3, A converter connected to the digital torque wrench through a communication line and receiving data processed by the digital torque wrench; And Memory means connected to said converter by a communication line and storing data transmitted by said converter; Torque measurement data processing automation system using a digital torque wrench having a torque sensor of a vertical double parallel plate structure, characterized in that it further comprises. The method of claim 6, The converter, The control unit performs a function of deleting data stored in the auxiliary memory of the digital torque wrench and changing a measurement reference setting value of the digital torque wrench when the data transmitted by the digital torque wrench is normally stored in the memory unit. Torque measurement data processing automation system using a digital torque wrench having a torque sensor of a vertical double parallel plate structure, characterized in that further comprises. The method of claim 8, The converter, Further comprising an alarm for notifying the user when the data processed in the digital torque wrench is out of a predetermined range of the set value, the calibration period of the torque wrench, or when the torque wrench work time, And an operation of the alarm device is controlled by the control unit. A system for automating torque measurement data processing using a digital torque wrench having a torque sensor having a vertical double parallel plate structure. The method according to claim 7 or 8, In the converter, Torque measurement data processing automation system using a digital torque wrench having a torque sensor having a vertical double parallel plate structure characterized in that it further comprises an auxiliary memory for storing the data processed by the digital torque wrench.

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