KR20220060579A - System for manufacturing towing nut - Google Patents

Abstract

In accordance with the present invention, disclosed is a towing nut manufacturing system including: a feeding hopper transferring and feeding a base body made by drawing and cutting a raw material by a predetermined length for the manufacture of a towing nut (10); a chamfering machine (120) chamfering each of both end corners of the base body transferred from the feeding hopper (110), at the same time; a drilling machine (130) drilling a nut hole (11) of a predetermined diameter in the center of the chamfered base body; a tapping machine (140) forming a tap in the drilled nut hole (11) to machine towing nut (10) into a nut shape with a screw thread; an inspection part (150) inspecting whether a screw thread is formed and whether the screw thread is suitable by turning and inserting a tool, having a tap formed on the outer circumference surface thereof, into the nut hole (11) of the towing nut (10); a discharge hopper (160) discharging the completely inspected towing nut (10); and a control part (170) controlling the feeding hopper (110), the chamfering machine (120), the drilling machine (130), the tapping machine (140), the inspection part (150), and the discharge hopper (160). Feeding, machining, inspection and discharge processes are automated in an in-line manner in one single system to be sequentially performed to provide the towing nut (10) fixed to a vehicle bumper mounting bracket (30) to be screwed with a towing hook (20). Therefore, the present invention is capable of minimizing an occupied space required for installation, and reducing processing costs.

Description

Toeing nut manufacturing system {SYSTEM FOR MANUFACTURING TOWING NUT}

The present invention reduces the processing cost by pultrusion molding the basic body, and minimizes the space required for installation by automating supply, processing, inspection and discharge in-line in a single system to sequentially perform the production of the basic body supply It relates to a towing nut manufacturing system that can minimize lead time.

In general, a towing device for a vehicle is a device for towing by connecting a cable to a vehicle body or connecting a trailer or a carrier when the vehicle is rescued or towed, in particular, a towing nut and towing for towing a passenger vehicle. As for the assembly of the hook, it is common to use a toeing nut to configure the bumper beam, and to screw the toeing hook to the toeing nut.

On the other hand, such a toing nut is fixed to the bumper beam by welding through a mounting bracket from the rear side of the bumper beam in a state of being inserted into the assembly hole formed on one side of the bumper beam.

The conventional towing nut is generally manufactured by casting, and accordingly, the manufacturing cost increases, and there is a problem in that the productivity is lowered by the operator individually checking the formation of the thread of the towing nut and whether there is a defect or not.

Accordingly, there is a need for a technology capable of improving the workability and productivity of the towing nut and automatically inspecting whether the towing nut is defective.

Korean Patent Publication No. 10-1643704 (Manufacturing method of lashing hook or toeing hook for securing automobiles, 2016.08.11) Korean Patent Publication No. 10-1240990 (Toeing Nut Inspection Device for Vehicles, 2013.03.18)

The technical task to be achieved by the spirit of the present invention is to minimize the occupied space required for installation by in-line automation of supply, processing, inspection, and discharge in a single system, thereby minimizing the required space for installation, and minimizing the production lead time of supplying the main body It is to provide a toe nut manufacturing system that can do this.

In order to achieve the above object, the present invention provides a supply hopper for transporting and supplying the main body cut by pultrusion molding of raw materials to a predetermined length for manufacturing toeing nut; a chamfering machine for simultaneously chamfering both ends of the main body transferred from the supply hopper; a perforator for boring a nut hole of a certain diameter in the center of the chamfered basic body; a tapping machine which forms a tab inside the machined nut hole and processes it into a toe nut in the shape of a nut having a thread; an inspection unit for inspecting whether a thread is formed and whether it is suitable for rotationally inserting a tool having a tab formed on an outer circumferential surface into the nut hole of the toe nut; a discharge hopper for discharging the inspected toe nut; and a control unit for controlling the supply hopper, the chamfering machine, the perforator, the tapping machine, the inspection unit, and the discharge hopper. Provided is a towing nut manufacturing system that is fixed to a bumper mounting bracket and provides a toe nut to which a toe hook is screwed.

Here, under the control of the control unit, it is possible to sequentially transfer the processing object to the chamfering machine, the perforator, the tapping machine and the inspection unit in-line by a conveyor.

In addition, the tapping devices may be disposed adjacent to each other in two or more rows to form tabs in two or more of the nut holes at the same time.

In addition, the discharge hopper may be composed of a defective discharge chute that separates and discharges defective products according to suitability judgment by the inspection unit, and a good discharge chute that separates and discharges good products.

In addition, the discharge hopper further includes a discharge guide that selectively guides to the bad discharge chute or the good product discharge chute according to the suitability determination by the inspection unit, the control unit can control the discharge guide to selectively guide there is.

In addition, the towing nut further comprises a cutting machine for cutting and processing the anti-rotation irregularities on the outer peripheral surface of one side of the toing nut processed by the tapping machine, so that the toing nut is stable in the fixing hole of the bumper mounting bracket in which the irregularities are formed in response to the anti-rotation irregularities It can be retracted and fixed.

The raw material is heat-treated by high-frequency induction heating at 800°C to 1100°C for 1 second to 5 seconds, and after performing the first quenching heat treatment in which the raw material is quenched to 250°C or lower within 5sec, the temperature is 1 to 800°C to 1100°C. After performing heat treatment by high-frequency induction heating for seconds to 5 seconds, secondary quenching heat treatment of quenching to 250° C. or less within 5 seconds, and then tempering at 200° C. to 700° C. for 30 minutes to 3 hours. , pultrusion may be performed and cut to prepare the base body.

According to the present invention, the basic body is pultruded to reduce the processing cost, and in a single system, supply, processing, inspection, and discharge are automated inline and sequentially performed to minimize the space occupied during installation, and supply the basic body It has the effect of minimizing the production lead time and minimizing the occurrence of scratches due to supply, transport and discharge.

1 schematically shows the configuration of a towing nut manufacturing system according to an embodiment of the present invention.
Figure 2 illustrates the coupling structure of the towing nut manufactured by the towing nut manufacturing system of Figure 1.

Hereinafter, embodiments of the present invention having the above-described characteristics will be described in more detail with reference to the accompanying drawings.

The toeing nut manufacturing system according to an embodiment of the present invention is a supply hopper 110 that transports and supplies the main body cut by pultrusion molding of raw materials to a predetermined length for manufacturing the toeing nut 10, transfer from the supply hopper 110 A chamfering machine 120 for simultaneously chamfering both ends of the main body, a perforator 130 for machining a nut hole 11 of a certain diameter in the center of the chamfered basic body, and the machined nut hole 11 inside The tapping machine 140 processes the toe nut 10 in the shape of a nut having a thread formed thereon by forming a tab, and a tool having a tab formed on the outer circumferential surface is rotated and inserted into the nut hole 11 of the toe nut 10. Inspection unit 150 for inspecting the formation and suitability of the toing nut 10, the discharge hopper 160 for discharging the toeing nut 10, and the supply hopper 110, the beveler 120, the perforator 130 and the tapping machine Including the control unit 170 for controlling the 140 and the inspection unit 150 and the discharge hopper 160, in-line automation of supply, processing, inspection and discharge in a single system and sequentially performs the vehicle bumper mounting bracket ( It is a gist to provide a toeing nut 10 fixed to 30) to which the toeing hook 20 is screwed.

Hereinafter, with reference to FIGS. 1 and 2 , the configuration of the above-described towing nut manufacturing system will be described in detail as follows.

First, the supply hopper 110 lifts and transports the basic body for manufacturing the towing nut, in which a metal, particularly a steel raw material is pultruded to a certain length and a specific shape, and cut to a toeing nut manufacturing for the towing nut manufacturing, with a chamfer 120, and is supplied.

Here, it is possible to reduce the processing cost by manufacturing the basic body for manufacturing toeing nut, which was previously manufactured by casting, through pultrusion molding, and to increase the production lead time by mass-producing the basic body through pultrusion and cutting compared to individual mold manufacturing. can be reduced to increase production efficiency.

On the other hand, exemplifying the process before pultrusion molding of the basic body, primary quenching is performed by heat-treating steel raw materials by high-frequency induction heating at 800°C to 1100°C for 1 second to 5 seconds, and quenching to 250°C or lower within 5 seconds. After performing the heat treatment, heat treatment is performed by high-frequency induction heating at 800° C. to 1100° C. for 1 second to 5 seconds, and after performing a secondary quenching heat treatment of rapid cooling to 250° C. or less within 5 seconds, 200° C. to 700° C. After performing tempering at ℃ for 30 minutes to 3 hours, by performing pultrusion molding and cutting, the same quenching heat treatment process of heat treatment and quenching treatment is performed twice in succession to prepare a high-strength basic body.

Next, the chamfering machine 120 sequentially or simultaneously chamfering the both ends of the main body transferred from the supply hopper 110 (chamfering).

Next, the perforator 130 may perform boring of the ø25-15L standard of the nut hole 11 of a certain diameter in the center of the base body previously chamfered.

Next, the tapping machine 140 forms a tap of M25x2.5 standard inside the machined nut hole 11 and processes it into the towing nut 10 in the shape of a nut having a thread.

Here, the tapping machine 140 may be arranged adjacent to each other in two or more rows to form tabs in two or more nut holes 11 at the same time to increase production efficiency.

On the other hand, further including a cutting machine 145 for cutting and processing the anti-rotation irregularities 12 on the outer peripheral surface of one side of the toe nut 10 processed by the tapping machine 140, as illustrated in FIG. 2 (b), The toeing nut 10 may be stably inserted into the fixing hole 31 of the bumper mounting bracket 30 having the unevenness formed in correspondence to the unevenness 12 for preventing rotation so as to be fixed thereinto. Accordingly, through the fastening structure of the anti-rotation irregularities 12, the towing nut 10 is firmly bound so that the toeing nut 10 does not turn outwardly by the force applied when the vehicle is towed by the fastening of the toeing hook 20 to prevent vehicle damage. may be

Next, the inspection unit 150 is configured to rotate and insert a tool having a tab formed on the outer circumferential surface corresponding to the tab formed on the inner circumferential surface of the nut hole 11 into the nut hole 11 of the toe nut 10 to determine whether a thread is formed and suitable check whether

For example, the inspection unit 150 may measure the number of rotations or the rotation depth of the tool by a sensor to determine whether the thread is formed and whether it is suitable.

Next, the discharge hopper 160 discharges the inspected toeing nut 10 .

Specifically, the discharge hopper 160 may be composed of a defective discharge chute that separates and discharges defective products according to suitability judgment by the inspection unit 150 and a good discharge chute that separates and discharges good products, and the discharge hopper 160 is It further includes an exhaust guide (not shown) that selectively guides to a bad discharge chute or a good product discharge chute according to the suitability determination by the inspection unit 150, and the control unit 170 allows the discharge guide to selectively guide defective products and good products. can be controlled

Next, the control unit 170 controls the supply hopper 110 , the chamfering machine 120 , the perforator 130 , the tapping machine 140 , the inspection unit 150 , and the discharge hopper 160 .

Here, under the control of the control unit 170, the processing object is sequentially transferred to the chamfering machine 120, the perforator 130, the tapping machine 140, and the inspection unit 150 by in-line connection by a chain-type conveyor. , it is possible to increase production efficiency by minimizing the transfer time, and to minimize the possibility of scratching the workpiece according to the shortened transfer time.

Accordingly, in a single system, the supply of the supply hopper 110 , the processing by the beveler 120 , the perforator 130 , the tapping machine 140 and the inspection unit 150 , the inspection of the inspection unit 150 , and discharge The discharging of the hopper 160 is automated and sequentially performed in-line, so that the toeing nut 10 fixed to the vehicle bumper mounting bracket 30 and screwed with the toeing hook 20 is manufactured as a one-stop system.

For example, in the single system according to this embodiment, during the actual machining process, chamfering for 5 seconds, drilling for 5 seconds, boring for 10 seconds, and inspection for 5 seconds are continuously performed to produce It can make it possible to shorten the delivery period by increasing the efficiency.

Therefore, by the configuration of the toe nut manufacturing system as described above, the main body is pultruded to reduce the processing cost, and in a single system, supply, processing, inspection and discharge are automated inline and sequentially performed during installation. It is possible to minimize the required space, minimize the production lead time of supplying the main body, and minimize the occurrence of scratches due to supply, transfer and discharge.

The embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiment of the present invention, and do not represent all of the technical spirit of the present invention, so various equivalents that can be substituted for them at the time of the present application It should be understood that there may be water and variations.

110: supply hopper 120: chamfering machine
130: perforator 140: tapping machine
145: cutting machine 150: inspection unit
160: discharge hopper 170: control unit
10: toe nut 11: nut hole
12: unevenness for rotation prevention 20: toe ink hook
30: bumper mounting bracket 31: fixing hole

Claims (7)

a supply hopper for transporting and supplying the main body cut by pultrusion molding of raw materials to a certain length for towing nut manufacturing;
a chamfering machine for simultaneously chamfering both ends of the main body transferred from the supply hopper;
a perforator for boring a nut hole of a certain diameter in the center of the chamfered basic body;
a tapping machine which forms a tab inside the machined nut hole and processes it into a toe nut in the shape of a nut having a thread;
an inspection unit for inspecting whether a thread is formed and whether it is suitable for rotationally inserting a tool having a tab formed on an outer circumferential surface into the nut hole of the toe nut;
a discharge hopper for discharging the inspected toe nut; and
A control unit for controlling the supply hopper, the chamfering machine, the perforator, the tapping machine, the inspection unit, and the discharge hopper; including,
A toe nut manufacturing system that provides a toe nut that is fixed to a bumper mounting bracket for a vehicle and screwed with a toeing hook by in-line automation of supply, processing, inspection and discharge within a single system.
According to claim 1,
Under the control of the controller, the towing nut manufacturing system, characterized in that the processing object is sequentially transferred in-line by a conveyor to the chamfering machine, the perforator, the tapping machine and the inspection unit.
According to claim 1,
The tapping machine is arranged adjacent to each other in two or more rows, characterized in that the tab is formed in two or more of the nut holes at the same time, a towing nut manufacturing system.
According to claim 1,
The discharge hopper is a towing nut manufacturing system, characterized in that it consists of a defective discharge chute that separates and discharges defective products according to the suitability judgment by the inspection unit, and a good product discharge chute that separates and discharges good products.
7. The method of claim 6,
The discharge hopper further includes a discharge guide for selectively guiding to the defective discharge chute or the good product discharge chute according to suitability determination by the inspection unit,
The control unit, characterized in that for controlling the discharge guide to selectively guide, towing nut manufacturing system.
According to claim 1,
Further comprising a cutting machine for cutting and processing the anti-rotation irregularities on the outer circumferential surface of one side of the toing nut processed by the tapping machine, the towing nut is stably drawn into the fixing hole of the bumper mounting bracket in which the irregularities are formed in response to the anti-rotation irregularities It is characterized in that to be fixed, toe nut manufacturing system.
According to claim 1,
The raw material is heat-treated by high-frequency induction heating at 800° C. to 1100° C. for 1 second to 5 seconds, and after performing the first quenching heat treatment of quenching to 250° C. or less within 5 sec, the temperature is 1 to 800° C. to 1100° C. After performing heat treatment by high-frequency induction heating for seconds to 5 seconds, secondary quenching heat treatment of rapid cooling to 250° C. or less within 5 seconds, and tempering at 200° C. to 700° C. for 30 minutes to 3 hours. , Towing nut manufacturing system, characterized in that to prepare the main body by performing pultrusion and cutting.

Images