KR20240044736A - Apparatus and method for fastening rivet nut to plate - Google Patents

Abstract

The present invention relates to an apparatus and method for fastening a rivet nut to a plate in which a rivet opening is formed.
The device for fastening the rivet nut to the plate includes a bolt for fastening the female thread of the rivet nut; a hexa adapter rotatably connected to the bolt; A hexa connector rotatably connected to the hexa adapter; a spin motor rotatably connected to the hex connector to rotate the bolt; a ball screw shaft that can be rotated by rotation of a traction motor; a hollow ball screw coupled to the ball screw shaft with a screw and moving forward and backward by rotation of the ball screw shaft; It further includes, wherein the bolt is connected to the hollow ball screw and can move together by forward and backward movement of the hollow ball screw due to rotation of the traction motor.
According to this configuration, the task of fastening a rivet nut to a plate using a device having a bolt at the front can be automatically performed, and when the bolt is separated from the female thread portion of the rivet nut, the bolt rotates and at the same time the bolt moves backward. It is possible to provide a device and method for fastening a rivet nut to a plate that can move to prevent damage to the rivet nut or plate.

Description

Apparatus and method for fastening rivet nut to plate {Apparatus and method for fastening rivet nut to plate}

The present invention relates to an apparatus and method for fastening a rivet nut to a plate in which a rivet opening is formed.

In general, rivets are used to integrally fasten at least two or more structures, such as plates, sections, mechanical or mechanical devices, and various workpieces.

Rivets are made by drilling a fastening hole in the plate to be connected, inserting the rivet, and then forming a locking jaw, or head, with a hammer or mechanical device and fixing it. Since these operations are performed manually, the connection process is complicated and requires the operator's attention. The defect rate greatly depends on the level of skill.

Recently, various types of rivets have been developed to make riveting work simple and efficient, and the most commonly used rivet nut for this purpose is a rivet nut that can be used with a pressure tool.

1 is a diagram showing a typical rivet nut.

The rivet nut (or blind nut) 10 consists of a cylindrical body 11 and a head 12 that protrudes in the form of a flange in front of the body 11.

The inner diameter of the body 11 is formed by a front unthreaded portion 11a and a rear female threaded portion 11b.

When fastening the rivet nut 10 to a plate, a device having a bolt at the front is inserted into the rivet nut 10 so that the bolt and the female thread portion 11b of the rivet nut 10 are fastened. In that state, when the rivet nut 10 is inserted into the plate with the rivet opening so that the head 12 is in contact with the plate and the bolt is pulled back, the unthreaded portion 11a of the rivet nut 10 is pulled back due to the traction force. While being pressed, the rivet nut 10 is firmly fixed to the plate by compression.

Conventionally, the rivet nut (10) was fastened to the plate using a device equipped with a bolt at the front, but this device is operated by a person directly, so if the number of rivet nuts (10) increases, a lot of labor is required. There was a problem of low work efficiency.

Therefore, when fastening the rivet nut 10 to a plate, it is necessary to ensure that all work is performed automatically using a device equipped with a bolt at the front rather than manually operated by a person.

In addition, after the rivet nut (10) is fixed to the plate, the bolt must be rotated in the opposite direction to separate the bolt from the female threaded portion (11b) of the rivet nut (10). When the bolt rotates, the screwed female threaded portion (11b) There was a problem in that the rivet nut 10 or the plate was damaged due to the pressing force causing it to retreat backwards.

Republic of Korea Patent Application No. 10-2015-0170793

Therefore, the present invention was invented in consideration of the above circumstances, and when fastening a rivet nut to a plate, the work can be performed automatically using a device provided with a bolt in the front without a person operating it manually. The purpose is to provide a device and method for fastening a rivet nut.

In addition, after the rivet nut is fixed to the plate, when the bolt is separated from the female thread of the rivet nut, the bolt rotates and moves backward at the same time to prevent damage to the rivet nut or plate. The purpose is to provide a device and method for fastening.

A device for fastening a rivet nut to a plate according to the present invention for realizing the above-described purpose includes a bolt for fastening the female thread of the rivet nut; a hexa adapter rotatably connected to the bolt; A hexa connector rotatably connected to the hexa adapter; a spin motor rotatably connected to the hex connector to rotate the bolt; Includes.

Additionally, a ball screw shaft that can be rotated by rotation of the traction motor; a hollow ball screw coupled to the ball screw shaft with a screw and moving forward and backward by rotation of the ball screw shaft; It further includes, wherein the bolt is connected to the hollow ball screw and can move together by forward and backward movement of the hollow ball screw due to rotation of the traction motor.

Additionally, a second pulley through which the hex connection part passes through a central opening; a first pulley power-connected to the second pulley through a belt; a traction motor for rotating the first pulley; a ball screw shaft coupled to the second pulley and capable of being rotated by rotation of the traction motor; a hollow ball screw coupled to the ball screw shaft with a screw and moving forward and backward by rotation of the ball screw shaft; an LM guide coupled to the hollow ball screw to guide forward and backward movement of the hollow ball screw; a cylindrical traction shaft coupled to the hollow ball screw; A bearing coupled to the hexa adapter at the inner diameter of the traction shaft to enable rotation of the hexa adapter; Including, the bolt can be rotated by the spin motor, and the bolt can be moved together by forward and backward movement of the hollow ball screw due to rotation of the traction motor.

Additionally, a traction washer coupled to the traction shaft; It may further include that the traction washer is in contact with the head of the bolt, and the backward movement of the hollow ball screw is transmitted to the traction shaft and the traction washer to move the bolt backward.

In addition, the hexa adapter is formed in a cylindrical shape, the end of the hexa connector is inserted into the inner diameter of the hexa adapter, and the hexa adapter can move forward and backward while being power-connected to the hexa connector.

A method for fastening a rivet nut to a plate using a rivet nut fastening device according to another embodiment of the present invention includes the steps of fastening a bolt formed at an end of the rivet nut fastening device with a female thread of the rivet nut; Inserting the rivet nut through the opening of the plate so that the head of the rivet nut contacts the plate; Moving the bolt rearward while the bolt and the female thread are fastened so that the body of the rivet nut is compressed and the rivet nut is fixed to the plate; separating the bolt from the female thread by rotating the bolt in a direction opposite to the fastening direction; Includes.

Additionally, in the step of separating the bolt from the female thread, the step of moving the bolt backward in conjunction with rotation of the bolt; It further includes.

In addition, following the step of fixing the rivet nut to the plate, checking whether the female thread is damaged by rotating the bolt forward or backward; It further includes.

According to the present invention, the task of fastening a rivet nut to a plate can be performed automatically using a device having a bolt at the front, and when the bolt is separated from the female thread portion of the rivet nut, the bolt rotates and at the same time the bolt moves backward. It is possible to provide a device and method for fastening a rivet nut to a plate that can move to prevent damage to the rivet nut or plate.

1 is a diagram showing a typical rivet nut.
Figure 2 is a perspective view showing a device for fastening a rivet nut according to an embodiment of the present invention.
FIG. 3 is a view showing the rivet nut fastening device of FIG. 2 in a disassembled state.
Figure 4 is a cross-sectional view showing the main components for rotating and pulling the bolt in the rivet nut fastening device of the present invention.
Figure 5 is a diagram showing a state in which the rivet nut fastening device of the present invention moves to the rivet nut.
Figures 6a to 6e are diagrams sequentially showing the process of fastening a rivet nut to a plate using the rivet nut fastening device of the present invention.

Hereinafter, the structure and operation of a preferred embodiment of the present invention will be described in detail with reference to the attached drawings. Here, in adding reference numerals to components in each drawing, it should be noted that identical components are indicated with the same reference numerals as much as possible, even if they are shown in different drawings.

Figure 2 is a perspective view showing a device for fastening a rivet nut according to an embodiment of the present invention. FIG. 3 is a view showing the rivet nut fastening device of FIG. 2 in a disassembled state. Figure 4 is a cross-sectional view showing the main components for rotating and pulling the bolt in the rivet nut fastening device of the present invention. Figure 5 is a diagram showing a state in which the rivet nut fastening device of the present invention moves to the rivet nut. 6A to 6E are diagrams sequentially showing the process of fastening a rivet nut to a plate using the rivet nut fastening device of the present invention.

The rivet nut fastening device 100 of the present invention automatically fastens the rivet nut 10 to the plate 20 by using a device equipped with a rotating bolt 110 at the front rather than manually operated by a person. This is to ensure that work can be done. Refer to Figure 1 for the configuration of the rivet nut 10.

2 to 4, the rivet nut fastening device 100 of the present invention includes a bolt 110, a hexa adapter 112, a hexa connection 113, a spin motor 116, a traction motor 164, 1st and 2nd pulleys (162, 160), belt 161, ball screw shaft 150, hollow ball screw 140, ball screw housing 135, LM guide 137, traction shaft 130, bearing (120), connecting screw 131, traction washer 132, traction cap 133, main nose casting 101, nose casting 102, control unit, etc.

Referring to Figure 2, the support plate 107 is in the shape of a plate and supports the components thereon. The cover 108 is connected to the support plate 107 to support the components and cover and protect the components.

The bolt 110 protrudes to the front of the rivet nut fastening device 100 so that it can be fastened to the female thread 11b of the rivet nut 10 by rotation. The bolt 110 is configured to be rotated by the spin motor 116 and move forward and backward by the traction motor 164.

Referring to Figures 2 and 3, the hex adapter 112 is rotatably connected to the bolt 110. In the hexa adapter 112, rectangular openings of different sizes are formed at the front and rear. A square hexa joint 111 is inserted into the front opening of the hexa adapter 112, and the hexa joint 111 is inserted into a square opening formed on the head of the bolt 110, so that the bolt 110 is connected to the hexa adapter ( 112) can be connected to power.

One end of the square hexa connector 113 is inserted into the rear opening of the hexa adapter 112, and the hexa connector 113 is rotatably connected to the hexa adapter 112.

The other end of the hex connector 113 is inserted into a square opening formed in the adapter 114, and the adapter 114 is rotatably connected to the spin reducer 115 connected to the spin motor 116.

The spin motor 116 is rotatably connected to the hex connector 113 through the spin reducer 115 and the adapter 114, and the bolt 110 can be rotated by rotation of the spin motor 116.

The spin reducer bracket 171 is coupled to the spin reducer 115, and the adapter housing 172 is coupled to the spin reducer bracket 171. An adapter 114 is inserted into the inner diameter portion of the adapter housing 172.

The traction motor 164 provides power to move the bolt 110 forward and backward, and rotates the first pulley 162 through the traction reducer 163. The traction reducer bracket 173 is coupled to the traction reducer 163.

The first pulley 162 is power connected to the second pulley 160 through a belt 161, and the rotational force of the traction motor 164 is transmitted through the first pulley 162 and the belt 161 to the second pulley 160. ) is transmitted.

An opening is formed in the center of the second pulley 160, and the hexa connector 113 can pass through this opening.

The ball screw shaft 150 is in the form of a shaft extending laterally and has a male thread on its outer circumference. The rear end of the ball screw shaft 150 is coupled to the second pulley 160 and may rotate together with the second pulley 160.

The hollow ball screw 140 is cylindrical and the ball screw shaft 150 is inserted through the inner diameter. A female thread for screw connection with the ball screw shaft 150 is formed on the inner diameter of the hollow ball screw 140. Accordingly, the hollow ball screw 140 moves forward and backward by rotation of the ball screw shaft 150 due to rotation of the traction motor 164.

The ball screw housing 135 is erected vertically and an opening is formed in the center. With the front end of the hollow ball screw 140 inserted into the opening of the ball screw housing 135, the hollow ball screw 140 is coupled to the ball screw housing 135. The ball screw housing 135 is coupled to the LM base plate 136, and the LM base plate 136 is coupled to the LM guide 137.

The LM guide 137 is combined with the ball screw housing 135 and guides the forward and backward movement of the hollow ball screw 140.

The traction shaft 130 is formed in a cylindrical shape and its rear end is coupled to the ball screw housing 135. Accordingly, the ball screw housing 135 and the traction shaft 130 move together according to the movement of the hollow ball screw 140.

The bearing 120 is coupled with the hexa adapter 112 at the inner diameter of the traction shaft 130 to enable rotation of the hexa adapter 112, and the hexa adapter 112 moves together as the traction shaft 130 moves. Make it move.

The cylindrical connecting screw 131 allows the traction shaft 130 and the traction cap 133 to be connected. A traction washer 132 is located between the connection screw 131 and the traction cap 133 and is connected to the traction shaft 130.

The front end of the traction washer 132 is in contact with the traction cap 133, and the rear end is in contact with the head of the bolt 110. The rearward movement of the hollow ball screw 140 due to the rotation of the traction motor 164 is transmitted to the traction shaft 130 and the traction washer 132, thereby moving the bolt 110 rearward.

The forward movement of the hollow ball screw 140 due to the rotation of the traction motor 164 in the opposite direction is transmitted to the hexa adapter 112 coupled with the bearing 120, and the hexa adapter 112 connects the head of the bolt 110. By applying pressure, the bolt 110 can move forward.

The hexa adapter 112 is formed in a cylindrical shape, and the front end of the hexa connector 113 is inserted into the inner diameter of the hexa adapter 112. A step portion 112a is formed on the inner diameter of the hexa adapter 112 to support the hexa joint 111 in front of the step portion 112a. The front end of the hex connection part 113 is located behind the step portion 112a.

The inner diameter of the rear end of the hexa adapter 112 has clearance in the lateral direction with the hexa connector 113 inserted, so the hexa adapter 112 can move forward and backward while being power-connected to the hexa connector 113. .

The inner diameter portion of the main nose casting 101 is inserted into the outer diameter portion of the traction shaft 130, and the nose casting 102 is screwed to the main nose casting 101. An adjusting nut 103 and an adjusting portion 104 are coupled to the front end of the nose casting 102. The adjusting portion 104 is formed in a hollow cylindrical shape and surrounds the outer circumference of the bolt 110, allowing the rotational motion and forward and backward movement of the bolt 110 to be performed precisely and stably.

The bolt 110 is a consumable part, and when the nose casting 102 is separated from the main nose casting 101, the end of the bolt 110 is exposed. Next, the traction cap 133 can be separated from the traction shaft 130 and the bolt 110 can be replaced.

The support unit 174 is erected vertically, and the ball screw shaft 150 passes through a central opening. The rivet tool block 175 stands vertically and supports the main nose casting 101, and the main nose casting 101 passes through the central opening.

The control unit controls the operation of the spin motor 116, the traction motor 164, etc.

According to the rivet nut fastening device 100 of the present invention as described above, the bolt 110 can be rotated by the spin motor 116 and moved forward and backward by the traction motor 164 simultaneously or separately.

The rotational motion of the bolt 110 allows it to be fastened to or separated from the female thread 11b of the rivet nut 10.

The forward movement of the bolt 110 maintains a state in which the bolt 110 can be fastened to the female thread 11b of the rivet nut 10.

The rear movement of the bolt 110 is performed by pulling the unthreaded body 11 of the rivet nut 10 backward while the bolt 110 and the female thread 11b of the rivet nut 10 are fastened to the body 11. is compressed so that the rivet nut (10) is fixed to the plate (20).

After the rivet nut 10 is fixed to the plate 20, the bolt 110 must be rotated in the opposite direction to separate the rivet nut fastening device 100 from the female screw 11b. At this time, when the bolt 110 rotates in the opposite direction while the rivet nut fastening device 100 is fixed, a pressing force is generated to retract the female screw 11b screwed to the bolt 110, thereby causing the rivet nut 10 or Damage may occur to the plate 20.

In the present invention, in order to prevent this problem, the control unit rotates the bolt 110 in the opposite direction by the spin motor 116, and simultaneously rotates the traction motor 164 to rotate the bolt 110 in conjunction with the rotation of the bolt 110. Move to the rear. That is, the control unit controls the rotation speed of the traction motor 164 so that the bolt 110 moves backward by the thread pitch of the bolt 110 according to the rotation speed of the bolt 110 by the spin motor 116.

Accordingly, the bolt 110 is separated from the female thread 11b of the rivet nut 10 and moves backward at the same time as the pitch generated by the rotation of the bolt 110, so that the female thread 11b of the rivet nut 10 has Since the pressing force is not applied, the rivet nut 10 or the plate 20 can be protected.

Hereinafter, with reference to FIGS. 3 and 6A to 6E, a method for fastening the rivet nut 10 to the plate 20 using the rivet nut fastening device of the present invention will be described.

First, as shown in FIG. 6A, the bolt 110 formed at the end of the rivet nut fastening device is fastened with the female thread of the rivet nut 10.

Next, as shown in FIG. 6B, with the bolt 110 fastened to the female thread of the rivet nut 10, the rivet nut 10 is inserted through the opening 21 of the plate 20. As shown in FIG. 6C, the head 12 of the rivet nut 10 contacts the plate 20, and the body 11 enters the opening.

Next, as shown on the right side of FIG. 6C, while the bolt 110 and the female screw 11b are fastened, the bolt 110 is moved backward, and the body 11 of the rivet nut 10 is compressed. The rivet nut (10) is fixed to the plate (20). The backward movement of the bolt 110 is achieved by the backward movement of the traction washer 132, which is in contact with the head of the bolt 110, while the hollow ball screw 140 moves backward due to the rotation of the traction motor 164 (FIG. 3 reference).

In the process of moving the bolt 110 backward while the bolt 110 and the female screw 11b are fastened, there is a possibility that the female screw 11b may be damaged. In the present invention, as shown in FIG. 6D, the control unit rotates the bolt 110 forward and backward using the spin motor 116 to check whether the female thread 11b of the rivet nut 10 is damaged. If it is determined that the female thread (11b) is damaged, the rivet nut (10) fixed to the plate (20) can be replaced.

Next, as shown on the right side of FIG. 6D, the bolt 110 is rotated opposite to the fastening direction by the spin motor 116 to separate the bolt 110 from the female screw 11b. At this time, the control unit rotates the traction motor 164 in conjunction with the rotation of the bolt 110 to move the bolt 110 rearward.

As shown in Figure 6e, when the bolt 110 is separated from the female thread 11b, the rivet nut fastening device is moved backward and the next work is performed.

According to the method for fastening the rivet nut 10 to the plate 20 using the rivet nut fastening device 100 of the present invention as described above, the rivet nut is automatically fastened by rotation and forward and backward movement of the bolt 110. While fixing (10) to the plate (20), at the same time, the bolt (110) can be separated from the rivet nut (10) without damaging the rivet nut (10) or the plate (20).

It is obvious to those skilled in the art that the present invention is not limited to the above embodiments and can be implemented with various modifications or variations without departing from the technical gist of the present invention. will be.

10: Rivet nut 11: Body
11b: female thread 12: head
20: plate 100: rivet nut fastening device
101: Male nose casing 102: Nose casting
103: Adjustment nut 104: Control unit
107: support plate 108: cover
110: bolt 111: hexa joint
112: hexa adapter 113: hexa connection part
114: adapter 115: spin reducer
116: spin motor 120: bearing
130: traction shaft 131: connection screw
132: towing washer 133: towing cap
135: Ball screw housing 136: LM base plate
137: LM guide 140: hollow ball screw
150: ball screw axis 160: second pulley
161: belt 162: first pulley
163: Traction Reducer 164: Traction Motor
171: Spin reducer bracket 172: Adapter housing
173: Traction reducer bracket 174: Support unit
175: Rivet tool block

Claims (8)

In a device for fastening a rivet nut to a plate,
A bolt for fastening with the female thread of a rivet nut;
a hexa adapter rotatably connected to the bolt;
A hexa connector rotatably connected to the hexa adapter;
a spin motor rotatably connected to the hex connector to rotate the bolt;
A device for fastening a rivet nut to a plate including a. According to paragraph 1,
a ball screw shaft that can be rotated by rotation of a traction motor;
a hollow ball screw coupled to the ball screw shaft with a screw and moving forward and backward by rotation of the ball screw shaft;
It further includes,
The bolt is connected to the hollow ball screw and can move together by forward and backward movement of the hollow ball screw due to rotation of the traction motor. According to paragraph 1,
a second pulley through which the hex connection part passes through a central opening;
a first pulley power-connected to the second pulley through a belt;
a traction motor for rotating the first pulley;
a ball screw shaft coupled to the second pulley and capable of being rotated by rotation of the traction motor;
a hollow ball screw coupled to the ball screw shaft with a screw and moving forward and backward by rotation of the ball screw shaft;
an LM guide coupled to the hollow ball screw to guide forward and backward movement of the hollow ball screw;
a cylindrical traction shaft coupled to the hollow ball screw;
A bearing coupled to the hexa adapter at the inner diameter of the traction shaft to enable rotation of the hexa adapter;
Including,
The bolt is rotatable by the spin motor,
A device for fastening a rivet nut to a plate, wherein the bolt can be moved together by forward and backward movement of the hollow ball screw due to rotation of the traction motor. According to paragraph 3,
A traction washer coupled to the traction shaft;
It further includes,
The traction washer is in contact with the head of the bolt,
A device for fastening a rivet nut to a sheet material, wherein the rearward movement of the hollow ball screw is transmitted to the traction shaft and the traction washer, thereby moving the bolt rearward. According to paragraph 2,
The hex adapter is formed in a cylindrical shape,
The end of the hexa connector is inserted into the inner diameter of the hexa adapter,
The hexa adapter is a device for fastening a rivet nut to a plate, capable of moving forward and backward while being power-connected to the hexa connector. In a method for fastening a rivet nut to a plate using a rivet nut fastening device,
Fastening a bolt formed at an end of the rivet nut fastening device with a female thread of the rivet nut;
Inserting the rivet nut through the opening of the plate so that the head of the rivet nut contacts the plate;
Moving the bolt rearward while the bolt and the female thread are fastened, so that the body of the rivet nut is compressed and the rivet nut is fixed to the plate;
separating the bolt from the female thread by rotating the bolt in a direction opposite to the fastening direction;
A method for fastening a rivet nut to a plate using a rivet nut fastening device comprising a. According to clause 6,
In the step of separating the bolt from the female screw,
moving the bolt rearward in conjunction with rotation of the bolt;
A method for fastening a rivet nut to a plate using a rivet nut fastening device further comprising. According to clause 6,
Following the step of securing the rivet nut to the plate,
Checking whether the female screw is damaged by rotating the bolt forward or backward;
A method for fastening a rivet nut to a plate using a rivet nut fastening device further comprising.