KR20120084945A - Torque measuring apparatus for fastener with automated fastening - Google Patents

Abstract

PURPOSE: A device for measuring the torque of a fastener by an automatic coupling is provided to freely move a fastening unit fixing unit where a fastening unit is fixed to an X-axis and a Y-axis, thereby coupling a fastener by accurately adjusting a central axis of the fastener. CONSTITUTION: A device for measuring the torque of a fastener by an automatic coupling comprises a frame(4), a fastening part fixing unit(8), a fastener coupling and decoupling unit(10), a torque sensor(46), and a data collecting and processing unit(200). The frame is orthogonally fixed to a base(2). The fastening part fixing unit installed in the base fixes a fastening part(6) which is an opposite part where a fastener is coupled. The fastener coupling and decoupling unit is installed in the frame and couples or decoupling the fastener to the fastening part with a driving force of a driving device(38). The torque sensor measures the torque of the fastener when coupling and decoupling the fastener. The data collecting and processing unit calculates a moving distance per each rotation of the fastener when coupling the fastener while collecting a torque value measured by the torque sensor.

Description

Torque measuring device for fasteners that can be automatically tightened {TORQUE MEASURING APPARATUS FOR FASTENER WITH AUTOMATED FASTENING}

The present invention relates to an apparatus for measuring torque of fasteners that can be automatically tightened, and more particularly, to fasteners capable of measuring the exact travel distance of the screw and the fastening force and detachment force of the screw required for fastening and removing the fastener. It relates to a torque measuring device of.

In general, fasteners such as bolts and screws are moved forward or backward in the axial direction when they are fastened to or removed from an object. At this time, the fastener can be automatically fastened using an automatic fastening device.

For fastening the fasteners, the object is provided with a boss having a predetermined shape. In most cases, the boss is formed of a cylindrical space portion so that the fastener can be fastened, or a female thread portion corresponding to the thread of the fastener is inserted into the insert.

Therefore, the fastener is fastened or removed by moving forward or backward by a predetermined length along the inside of the boss when fastening or removing.

When fastening or removing these fasteners to the object, if the fasteners are longer or shorter than the distance to be moved, the fasteners will not be fastened or removed correctly.

As described above, when fastening the fastener to the target object and assuming that the fastener is a rigid body without deformation, the fastening force and the stripping force show different torque values depending on the type of the object. That is, the torques according to the fastening / removing of the fasteners differ depending on the structure of the thread of the fastener, the structure and the material of the boss to which the fastener is fastened, and the like.

The forward or backward travel of the fastener consists of the product of the pitch of the fastener and the number of threads formed spirally along the screw outer surface. By this mechanism the fastener has a lead, which is the exact travel distance for one revolution of the fastener upon fastening and dismounting.

Korean Patent Laid-Open Publication No. 2009-0120357 has been proposed as a conventional technique for measuring fastening force or stripping force for fasteners and bosses. The patent application has an arbitrary movement distance rather than the exact movement distance calculated by the rotation of the fastener, so that accurate torque measurement is impossible.

In addition, in the case of Korean Patent Registration No. 10-0868524, the central axis between the screw and the boss is not kept constant, and the accuracy of the measured value is lowered when the tightening or removing force is measured using a torque wrench.

The present invention has been proposed to solve the conventional problems as described above, and an object of the present invention is to provide the exact moving distance of the screw and the fastening force of the fastener according to the shape of the fastener and the type of the boss. An object of the present invention is to provide a torque measuring device for a fastener capable of automatically tightening a stripping force.

Torque measuring device of the fastener capable of automatic tightening proposed by the present invention,

A torque measuring device for measuring the torque of the fastener fastened to the object using an automatic fastening device,

A base and a frame fixed perpendicularly to the base; Fastening part fixing means for fixing a fastening part which is a counterpart to which the fastener is fastened to the base; Fastener fastening and detaching means installed on the frame and fastening or removing fasteners to a fastening part fixed to the fastening part fixing means by a driving force of a driving device; A torque sensor measuring torque of the fastener when the fastener is fastened and removed; While collecting the torque value measured by the torque sensor calculates the movement distance per one rotation of the fastener when the fastener is fastened, and collects the moving distance of the fastener while raising the fastener fastening and removal means according to the calculated value It provides a fastening torque measuring device capable of automatic fastening including data collection and processing means.

The fastening part fixing means includes a fixing part fixed to the base, a first slide part connected to the first shaft to be slidably moved in the y-axis direction from the fixing part, and a slide movement in the x-axis direction on the first slide part. It is composed of a second slide portion that is possibly connected to the second shaft and the coupling portion is installed, the rotary knob is formed at each end of the first and second shafts so as to easily rotate these shafts.

The fastening part is configured to be detachably fixed to the fastening part fixing means.

The fastener fastening and dismounting means includes a guide installed on the frame, a lifting part that moves up and down along the guide by a driving force of a driving device, and is installed on the lifting part and rotates by a driving force of a driving source to fasten the fastener to the fastening part. Or bits to remove or remove.

The data collection and processing means is provided with a display unit for displaying the torque value measured by the torque sensor and the movement distance per revolution of the fastener.

In addition, the automatic fastening torque measuring device of the present invention is further provided with a data storage means for storing data of the data collection and processing means, the data storage means is made of a computer or PDA.

Torque measuring device of the fastener capable of automatic fastening according to the present invention can know the moving distance per one rotation of the fastener together with the torque when fastening the fastener can know the exact fastening force of the fastener.

Accordingly, when fastening / unfastening the fastener using the automatic fastening device, it is possible to fasten / removal with the most suitable torque according to various materials.

In addition, the fastening part fixing means to which the fastening part is fixed can be freely moved to the x and y axes, so that the fastening can be precisely matched to the central axis of the fastener.

In addition, suitable materials, sizes and shapes can be applied when designing elements such as boss joints.

1 is a perspective view of a torque measuring device of a fastener capable of automatic fastening according to the present invention.
Figure 2 is a perspective view of the main part of the torque measuring device of the fastener capable of automatic fastening according to the present invention.
3 is a view for explaining a fastening unit fixing means provided in the torque measuring device of the fastener capable of automatic fastening according to the present invention.
Figure 4 is an enlarged perspective view of the fastening portion provided in the torque measuring device of the fastener capable of automatic fastening according to the present invention.
5 is a view showing a state in which the fastening portion and the center line coincide with the fastening torque measuring device of the fastener capable of automatic fastening according to the present invention.
6 is a view for explaining the moving distance during one rotation of the fastener when fastening the fastener using the torque measuring device of the fastener capable of automatic fastening according to the present invention.
7 is a view showing that the fastener is fastened to the fastening unit by using the torque measuring device of the fastener capable of automatic fastening according to the present invention.

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

1 to 4 is a view for explaining the configuration of the torque measuring device of the fastener capable of automatic fastening according to the present invention, the present invention is a torque for measuring the torque of the fastener fastened to the object using the automatic fastening device As a measuring device, reference numeral 2 denotes a base.

The base 2 is formed in a rectangular shape having a predetermined size so that it can be placed on the floor, and one side end thereof is connected to the frame 4 in the orthogonal direction upward from the base 2.

These bases 2 and the frame 4 are provided with respective elements constituting the torque measuring device of the present invention.

The base 2 is provided with a fastening part fixing means 8 for fixing the fastening part 6 formed to fasten the measurement target fastener 100 (hereinafter referred to as "fastener") to measure torque. .

The fastener 100 is shown in this embodiment, but the shape is made of a screw, but is not limited to this, for example, may be made of a bolt or the like used to assemble or fix the objects to each other.

The frame 4 is provided with fastener fastening and removal means 10 for fastening or removing the fastener 100 to the fastening part 6 fixed to the fastening part fixing means 8, respectively.

The fastening portion 6 consists of a plate 12 and a boss 14 formed on the upper surface of the plate 12 to which the fastener 100 is fastened.

Plate 12 is made of a rectangular frame having a predetermined thickness is to be detachably fixed to the binding portion fixing means (8).

The boss 14 is formed in the plate 12 is configured to measure the torque according to the fastening and detachment of the fastener 100 over a number of times.

The fastener 100 and the boss 14 are made of the same ones used in the field when fastening the object.

The present invention is to use the fastener 100 and the boss 14 in the field as the equipment for measuring the exact fastening force and the detachment force of the fastener 100 before assembling the object, the fastener 100 in this measurement It is configured to measure the torque with respect to the exact distance moving per revolution of.

The fastener 100 and the boss 14 may be made of various materials such as metal or plastic, and may have different structures of a thread formed along the outer circumferential surface of the fastener 100.

In addition, the boss 14 may be formed of a space portion, and a female thread portion corresponding to a screw thread formed in the fastener 100 may be formed in the space portion, or may have a threadless structure so that the fastener 100 may be tightly fastened. It may be done.

At this time, the fastener 100 is made to be fastened and removed through the fastening part fastening and removal means 10 to the fastening part 6 fixed by the fastening part fixing means 8.

The fastening part fixing means 8 includes a fixing part 16 fixed to the base 2 and a first slide connected to the first shaft 18 so as to slide in the y-axis direction from the fixing part 16. And a second slide part 24 connected to the second shaft 22 so that the first slide part 20 can slide in the x-axis direction and the fastening part 6 is installed. .

Male threads are formed on the outer circumferential surfaces of the first and second shafts 18 and 22, respectively, and the first and second slide parts 20 and 24 are formed on the lower surfaces thereof. A female screw portion is formed to be screwably movable.

Accordingly, when the first shaft 18 is rotated, the first slide unit 20 slides in the y-axis direction based on the fixing unit 16, and when the second shaft 22 is rotated, the second slide unit 24 is rotated. ) Slides in the x-axis direction with respect to the fixing part 16. Therefore, the fastening portion 6 can move freely in the x, y axis direction.

In addition, rotary knobs 26 and 28 are formed at one end of the first and second shafts 18 and 22 so that the respective shafts can be easily rotated.

The first and second guides for guiding the movement of the first slide unit 20 are provided in the fixing unit 16 so that the slides of the first and second slide units 20 and 24 can be smoothly moved in the horizontal direction. 30 is formed, and a second guide portion 32 for guiding the second slide portion 24 is formed in the first slide portion 20.

The second slide part 24 is provided with a plurality of fixed support parts 34 configured to fix or release the fastening part 6, and the fixed support part 34 is provided with a second slide part ( 24) is configured to be fixed and released.

Therefore, the fastening part 6 is configured to be detachably fixed to the fastening part fixing means 8.

Since the fastening part 6 can be freely moved to the x and y axes through the fastening part fixing means 8 as described above, fastening the fastener 100 to the fastening part 6 in a state where the central axis is exactly matched. Precise torque can be measured.

Fastener fastening and detaching means 10 are provided to fasten the fastener 100 to the fastening part 6 fixed to the fastening part fixing means 8.

The fastener fastening and removing means 10 includes a guide 36 installed on the frame 4, a lifting unit 40 that moves up and down along the guide 36 by a driving force of the driving device 38, and the lifting unit Is installed on the 40 and rotates by the driving force of the drive device 38 includes a bit 42 for fastening or fastening the fastener 100 to the fastening portion (6).

The drive unit 38 is composed of a plurality of motors, one motor performs the lifting operation of the lifting unit 40, the other serves to rotate the bit 42 forward or reverse. That is, the driving device 38 includes a motor for rotating the bit 42 and a device for precisely controlling the number of revolutions of the motor, and a linear motor to move the lifting unit 40 up and down by a predetermined distance by a signal from the sensor. And a lift moving device 48 mounted thereon. In addition, the drive of the lift unit moving drive unit 48 is controlled by the control of the lift unit drive unit control unit 50.

The guide 36 and the lifting unit 40 are provided with a member for changing the rotational movement according to the drive of the drive device 38, such as a rack and pinion to a linear movement, or vice versa. And lift 40).

And the bit 42 is fixed with a bit fastener 44 made to be replaced with another bit as shown in Figure 5, the front end is made to be fitted into the groove formed in the head of the fastener (100).

As described above, the torque measuring device of the fastener capable of automatic fastening according to the present invention uses the fastener fastening and detaching means 10 to fasten / remove the fastener 100 to the fastening part 6. Is measured and transmitted to the data collection and processing means 200 to be displayed on the display unit 202 made of LCD.

In this case, as shown in FIG. 6, since the fastener 100 has a thread 102 formed in an oblique direction along the outer circumferential surface, the fastener 100 moves in a linear direction while rotating. As described above, when fastening / fastening the fastener 100, the moving distance l per revolution of the fastener 100 is the number of rows n of the thread 102 formed on the fastener 100 and the pitch p of the thread 102. Is equal to the product of That is, l = p × n, and when the fastener 100 is fastened / detached to the fastening part 6 according to the above formula, the movement distance l per revolution of the fastener 100 is obtained by data collection and It is calculated by the processing means 200 and displayed on the display unit 202.

The movement distance l per revolution of the fastener 100 can be calculated as follows. For example, if the number of threads of the fastener to be measured is 10 and the pitch is 0.1 mm, the moving distance per revolution of the fastener is 10 x 0.1. That is, 1 mm.

Since the user knows the standard (line number, pitch) of the standard screw or non-standard (custom type) screw, and inputs it to the measuring device through the data storage means 300, the moving distance of the fastener can be calculated by the number of threads x pitch. In actual operation of the measuring device, the rotation of the screw is 360 °, so the movement distance per unit revolution is controlled. That is, for example, if 1 mm of one turn of the fastener is to be moved, it is 1 mm / 360 °, so about 0.00277777... mm is moved.

When the fastener 100 is fastened in this manner, when the moving distance per one rotation of the fastener 100 is displayed on the display unit 202 together with the torque measured by the torque sensor 46, the fastening force 100 and the removal force of the fastener 100 may be reduced. In this case, since the overall moving distance of the fastener 100 may be accurately known, the fastener 100 may be fastened / removed with the correct torque and moving distance.

Data delivered to the data collection and processing means 200 may be stored in the data storage means 300. For this purpose, the data collection and processing means 200 and the data storage means 300 may be connected by wire or wirelessly.

The data storage means 300 may be formed of, for example, a computer, a PDA terminal, or the like, and any other device capable of storing data may be applicable.

The data stored in the data storage means 300 may be used as data when manufacturing a device for automatically fastening / removing the fastener 100.

To use the torque measuring device of the fastener capable of automatic fastening of the present invention as described above is as follows.

First, the fastening part 6 is seated on the second slide part 24 of the fastening part fixing means 8, and the fastening part 6 is mounted using the fixed support part 34.

Then, the bit 42 is fixed to the bit fastener 44, and the head of the measurement target fastener 100 is fitted to the tip of the bit 42 to fix it.

In this state, the first shaft 18 and the second shaft 22 are rotated using the rotary knobs 26 and 28 to rotate the first slide portion 20 and the second slide portion 24 on the y-axis, x. The center axis of the bit 42 coincides with the center axis of the boss 14 to which the fastener 100 is fastened by sliding the shaft in the axial direction to adjust the position of the fastening part 6.

Then, when the number and pitch of the thread 102, which is the standard of the screw of the fastener 100 to be measured, are input through the data storage means 300, the lead calculated by the program (travel distance l) is moved up and down by the lift unit. The controller 50 is input to the controller 50.

Then, the driving unit 38 is driven to lower the elevating unit 40 while rotating the bit 42 to bring the bit 42 close to the boss 14 formed in the fastening unit 6 as shown in FIG. 7A, and then elevating. When the lower portion 40 is further lowered, as shown in FIG. 7B, the fastener 100 is inserted into the boss 14 to generate rotational resistance, which is equal to the torque value, which is measured by the torque sensor 46. The data is transmitted to the data collection and processing means 200 and displayed on the display unit 202. Even when the fastener 100 is removed, the torque may be measured by the torque sensor 46 to transmit the data to the data collecting and processing means 200 and displayed on the display unit 202.

At this time, the movement distance l per rotation of the fastener 100 to be fastened is also calculated by the data collection and processing means 200 and displayed on the display unit 202.

As described above, the lifting unit moving driving unit 48 is controlled by the lifting unit moving driving unit controller 50 until the fastener 100 is completely fastened to the boss 14 as shown in FIG. The fastener 100 is moved by an accurate movement distance. At this time, the torque of the fastener 100 and the movement distance per revolution are continuously measured by the torque sensor 46, and the data is transmitted to the data collection and processing means 200. Continued display at 202, the data transferred to the data collection and processing means 200 is stored in the data storage means 300.

When the fastener 100 is fastened to the boss 14 in this manner, the rotational speed of the fastener 100 and the moving speed of the lifting unit 40 may be adjusted through the lifting unit moving driving unit controller 50. This is because when the fastening speed of the fastener is fast, the moving speed of the lifting part is also increased in proportion to this, so the frictional force with the boss generated during fastening of the fastener generates frictional heat. Torque factor). In other words, if the sensitivity to heat varies depending on the type, such as plastic, the result can be different depending on the fastening speed when tested at the same boss size and thread size. very important.

Through the data stored in the data storage means 300 as described above it is possible to calculate the fastening torque of the fastener 100 and the total travel distance when the complete fastening, using this data to automatically fasten the fastener 100 It can be manufactured by calculating the exact length of fastening / untaking while using the basic data when manufacturing the automatic fastening device.

In this case, the measurement data may be used, but for the reliability of the measurement data, the position of the fastening part 6 is slid in the y-axis and x-axis directions to move the central axis of the other boss formed in the fastening part 6 and the The same fastener as the fastener is measured in the same manner as described above to obtain the data by measuring the torque and the moving distance per rotation of the fastener according to the fastening / removal, and the average value of these data may be calculated and used.

Although the preferred embodiments of the present invention have been described for the purpose of illustration, the present invention is not limited thereto, and various modifications can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings.

2: base 4: frame
6: fastening part 8: fastening part fixing means
10: fastener fastening and removal means 12: plate
14: Boss 16: Fixed part
18, 22: shaft 20, 24: slide section
26, 28: rotary knob 30, 32: guide portion
34: fixed support 36: guide
38: drive device 40: lift
42: bit 44: beat fixture
46: torque sensor 48: lift moving device
50: lifting unit moving drive control unit
100: fastener 102: thread
200: data collection and processing means 202: display unit
300: data storage means

Claims (9)

A torque measuring device for measuring the torque of the fastener fastened to the object using an automatic fastening device,
A base and a frame fixed perpendicularly to the base;
Fastening part fixing means for fixing a fastening part which is a counterpart to which the fastener is fastened to the base;
Fastener fastening and detaching means installed on the frame and fastening or removing fasteners to a fastening part fixed to the fastening part fixing means by a driving force of a driving device;
A torque sensor measuring torque of the fastener when the fastener is fastened and removed;
Data collection and processing means for calculating a moving distance per revolution of the fastener when the fastener is fastened while collecting the torque value measured by the torque sensor;
Torque measurement device of the fastener capable of automatic fastening comprising a. The method according to claim 1,
The fastening part fixing means includes a fixing part fixed to the base, a first slide part connected to the first shaft to be slidably moved in the y-axis direction from the fixing part, and a slide movement in the x-axis direction on the first slide part. Torque measuring device of the fastener capable of automatic fastening consisting of a second slide portion that is possibly connected to the second shaft and the coupling portion is installed. The method according to claim 2,
A torque measuring device of a fastener capable of auto-fastening, each of which has rotary knobs formed at one end of the first and second shafts so as to easily rotate these shafts. The method according to claim 1,
Torque measuring device of the fastener capable of automatic fastening configured to be detachably fixed to the fastening portion fastening means. The method according to claim 1,
The fastener fastening and dismounting means includes a guide installed on the frame, a lifting part that moves up and down along the guide by a driving force of a driving device, and is installed on the lifting part and rotates by a driving force of a driving source to fasten the fastener to the fastening part. Torque measuring device for fasteners that can be automatically tightened by means of fastening or removing bits. The method according to claim 1,
The data collecting and processing means is a torque measuring device of the fastener capable of automatic fastening provided with a display unit displaying the torque value measured by the torque sensor and the moving distance per one revolution of the fastener. The method according to claim 1,
And a torque measuring device of the fastener capable of automatic fastening, wherein the torque measuring device of the fastener capable of automatic fastening is further provided with data storage means for storing data of data collection and processing means. The method of claim 7,
The data storage means is a torque measuring device of the fastener capable of automatic fastening made of any one of a computer, PDA. The method according to claim 5,
The lifting unit and the bit is a torque measuring device of the fastener capable of automatic fastening configured to adjust the lifting speed and rotation speed.

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