KR101665198B1 - Cold drawn bar manufacturing system for cold forging and the method of the same - Google Patents

Abstract

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to manufacture a cold draw bar having a precise dimension and weight by measuring not only the dimensions but also the weight of the cold draw bar cutting material used for cold forging. In addition, by producing a cold-drawn bar cutting material having more accurate dimensions and weight, there is no gap or burr between the cold forging die and the cold draw bar during the cold forging process, so that the cold forging process can be performed more easily and accurately The defect rate is reduced. In addition, since the weight of the cold draw bar can be measured during the manufacturing process, there is an advantage that it is not necessary to additionally measure the weight of the cold draw bar during the cold forging process. Further, by measuring the weight after cutting the length of the cold draw bar and completing the chamfering process, the weight of the cold draw bar for more accurate dimensions can be measured.

Description

Technical Field [0001] The present invention relates to a cold drawn bar for cold forging,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system and a method for manufacturing a cold drawing bar for cold forging, and more particularly, to a manufacturing system and a method for manufacturing a material for cold forging with accurate dimensions and weight.

Generally, a cold drawn bar (CD bar) is also referred to as a bar bar, which is made by cutting a raw material into a desired shape through a die, It says. That is, a wire rod that has undergone a hot rolling process is passed through a die to reduce the size of the wire rod, and a straight bar is formed in a bar shape, and the cold draw bar is cut to an appropriate length. In order to use the cold drawing bar as a material for cold forging, it is generally used after cutting to an appropriate length.

However, when the weight of the cut cold drawn material is not accurate, for example, when the cold draw bar has a small diameter, the cold draw bar is inserted between the mold and the material If the diameter of the cold draw bar is large, the cold draw bar becomes larger than the size of the mold, and a forging process such as a burr or breakage of the mold is not performed smoothly. have.

Korean Patent No. 10-0878370 (Announced on January 15, 2009)

An object of the present invention is to provide a system and a method for manufacturing a material for cold forging capable of producing a cold drawn bar cutting material having more accurate dimensions and weight.

A cold draw bar manufacturing system for cold forging according to the present invention comprises a supply stand for supplying a cold draw bar formed by a cold drawing process in the longitudinal direction and a cold draw bar for cutting the cold draw bar supplied from the supply stand to a predetermined set length A rotary mechanism for rotating the cold drawing bar cut at the cutter at a predetermined angle so that the cold draw bar is positioned in a direction perpendicular to the longitudinal direction in the longitudinal direction, a conveying conveyor for conveying the cut material rotated in the rotary mechanism, A chamfering machine for working both ends of the cut material conveyed by the conveying conveyor, and a weight measuring device for measuring the weight of the cut material processed in the face picker, comparing the measured weight with a preset normal weight range, A weighing machine for sorting the feeder, the cutter, the rotating mechanism, the conveying conveyor, And a control unit for controlling the operation of the weighing and weighing machine.

The robot may further include a robot arm for transferring the cut material processed in the face picker to the weighing machine and sorting the cut material according to a result determined by the weighing machine.

The apparatus may further include a reject box for collecting the cut material determined to be defective in the weighing machine.

The apparatus may further include a guide unit that feeds the cut material determined to be normal by the weighing machine, and a lift that collects the cut material fed through the guide unit and feeds the cut material vertically.

The apparatus may further include a sensor disposed on at least one of the guide unit and the lift, for measuring the number of the cut materials.

The control unit may move the lift to a container to load the cut material when the number of the sensors measured by the sensor reaches a predetermined set number.

A method of manufacturing a cold drawing bar for cold forging according to the present invention includes a supplying step of supplying a cold drawing bar formed by a cold drawing process in the longitudinal direction and a cold drawing bar supplied in the supplying step, A cutting step for cutting the cut material, a rotating step for rotating the cold cut bar cut at the cutting step at a predetermined angle, a feeding step for feeding the cutting material rotated in the rotating step through a conveying conveyor, A weighing step of measuring the weight of the cut material processed in the chamfering step, and a weighing step of comparing the weight measured in the weighing step with a predetermined set weight range to select the normal and the defective And a stacking step of stacking and transporting the cut material determined to be normal in the sorting step .

The loading step may include detecting a number of cut materials determined to be normal, collecting the cut material on a lift until the detected number reaches a predetermined set number, And moving the lift in the vertical direction to load the cutting materials gathered in the lift on the container when the lift amount reaches the set number.

According to the present invention, it is possible to manufacture a cold forging material having more accurate dimensions and weight by measuring not only the dimensions of the cold draw bar used for cold forging but also the weight.

In addition, since cold forging materials having more accurate dimensions and weights are produced, there is no gap or no gap between the cold forging die and the cold forging material during the cold forging process, thereby making the cold forging process easier and more accurate .

Further, since the weight of the material for cold forging can be measured during the manufacturing process, there is an advantage that it is not necessary to additionally measure the weight of the material during the cold forging process.

Further, by measuring the weight after cutting the length of the cold draw bar and completing chamfering, it is possible to measure the weight of the material for cold forging to more accurate dimensions.

Further, when a cold forging material is produced, length cutting, chamfering, weight measurement, and stacking are performed in one step in a series of steps, thereby making it easier to manufacture.

When the length of the cold draw bar is to be cut, the cold draw bar is transferred in the longitudinal direction, and after the length is cut, it is rotated in the lateral direction and chamfering, weight measurement and loading processes are performed. Can be minimized.

1 is a view showing a manufacturing system of a cold cut bar for cold forging according to an embodiment of the present invention.
2 is a top view of the manufacturing system shown in Fig.
3 is an enlarged view of a portion A in Fig.
4 is a view illustrating a method of manufacturing a cold cut bar for cold forging according to an embodiment of the present invention.

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

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a manufacturing system of a cutter blank for cold forging according to an embodiment of the present invention; FIG. 2 is a top view of the manufacturing system shown in Fig. 3 is an enlarged view of a portion A in Fig.

1 and 2, a system for manufacturing a cutting material for cold forging according to an embodiment of the present invention includes a feed table 10, a cutter 20, a rotating mechanism 30, a conveying conveyor 40, A robot 50, a robot arm 70, a weighing machine 60, and a control unit 100. [

The supply stand 10 feeds a cold draw bar (CD bar) made by the cold drawing process in the longitudinal direction.

The cutter 20 cuts the cold draw bar A supplied from the supply stand 10 to a predetermined set length. The cutter 20 cuts the cold draw bar A using a saw. In the present embodiment, the setting length is about 150 mm, for example. The dimensions of the cold draw bar A are confirmed in the cutter 20 and the remaining portion cut off by the cutter 20 or defective in the cutter 20 is discharged to the chip box 22.

On the other hand, the rotation mechanism 30 rotates the cold-drawn bar cutting material B cut by the cutter 20 at a predetermined angle. In this embodiment, the predetermined angle is 90 degrees, for example. That is, the cutting material B positioned in the longitudinal direction is rotated so as to be positioned in the direction perpendicular to the longitudinal direction. In the cutter 20, when the cutting material B is positioned in the longitudinal direction, it is easy to cut the length. However, when the cutting material B is arranged in the longitudinal direction, since the processing line becomes long, And is arranged in the horizontal direction perpendicular to the longitudinal direction.

On the other hand, the conveying conveyor 40 conveys the cut material B, which has been rotated by the rotating mechanism 30, to the take-up machine 50 described later. The conveying conveyor 40 is made up of a conveyor belt arranged in an upward sloping manner and moves the rotating cutting material B upward in the rotating mechanism 30. [

The chamfering machine (50) processes both ends of the cutting material (B) conveyed from the conveying conveyor (40). The chamfering machine 50 is a process of processing a sharp portion of a cut surface and is called a deburring or a chamfering. It is possible to prevent the materials from being stuck together in the process described later, and also to solve the defect caused by the sharp portion of the cut surface when the customer inserts the cold forging material.

The robot arm (70) lifts the cut material (B) processed in the chamfering machine (50) and moves it to the weighing machine (60).

On the other hand, the weighing machine 60 measures the weight of the cut material B processed in the take-up machine 50, compares the measured weight with a predetermined normal weight range, and determines whether the cut material B is normal or not Select. As described above, since the weight of the cut material B that has been processed to a predetermined dimension while passing through the cutter 20 and the pick and place machine 50 is measured, weight measurement for the cut material B having a more accurate dimension There is a possible advantage. In the present embodiment, the weight measuring instrument 60 includes the load cell 62, but the present invention is not limited thereto and any weight measuring instrument can be used.

Here, the weighing machine 60 includes a reject box 64 for collecting the cut material B ', which is determined that the measured weight is out of the normal weight range and is defective. In the weighing machine 60, the defective cutting material B 'is transferred to the reject box 64 by the robot arm 70.

The weighing machine 60 further includes a guide unit 82 for guiding the normal cutting material B ", which is determined to be normal, to be within the normal weight range, to the lift 86. In the weighing machine 60, the normal cutting material B '' is transferred to the guide unit 82 by the robot arm 70. The guide unit 82 may be a guide rail, a guide roller, or the like.

The guide unit 82 is provided with a sensor 84 for detecting the number of normal cutting materials B " passing through the guide unit 82. The control unit 100 moves the lift 86 when the number of normal cutting materials B " detected by the sensor 84 reaches a predetermined set number.

On the other hand, the lift 86 is disposed on the end side of the guide unit 82 to collect the normal cutting material B " through the guide unit 82. [ The lift 86 is installed so as to be movable in the vertical direction by the lift driving portion 88. The lift driving unit 88 may be configured in various ways such as a hydraulic type, a motor type, a body type, and the like, and any one capable of moving the lift 86 in the vertical direction is possible.

Here, below the lift 86, a container 90 (process box) in which the normal cutting material B " carried by the lift 86 is loaded is installed. The container 90 is conveyed by the roller conveyor unit 92.

On the other hand, the control unit 100 includes a feeder 10, a cutter 20, a rotating mechanism 30, a conveying conveyor 40, a picker 50, a weighing machine 60, a robot arm 70, Thereby controlling the operation of the sensor 84 and the lift 86.

4 is a view illustrating a method of manufacturing a cold cut bar for cold forging according to an embodiment of the present invention.

Referring to FIG. 4, a method of manufacturing a cold cut bar for cold forging according to an embodiment of the present invention is as follows.

First, a supply step of supplying a cold draw bar (A) made by a cold drawing process to a cutter (20) through a supply stand (10) is performed (S1). At this time, the cold draw bar A is fed in the longitudinal direction.

A cutting step of cutting the cold draw bar A supplied in the supplying step to a predetermined set length by using the cutter 20 is performed (S2). Here, since the cold draw bar A is supplied in the longitudinal direction, it is easy to check the length of the cold draw bar A in the cutter 20 and cut it to a set length. In the present embodiment, the setting length is about 150 mm, for example. The cold draw bar having a length shorter than the set length in the cutter 20 can be judged to be defective. The cut portion remaining in the cutter 20 and the part judged to be defective are discharged to the chip box 22.

Meanwhile, a rotating step of rotating the cut blank material (B) cut at the cutting step through a rotation mechanism (30) is performed at a predetermined angle (S3). In this embodiment, the predetermined angle is 90 degrees, for example. That is, the cutting material B positioned in the longitudinal direction is rotated so as to be positioned in the transverse direction perpendicular to the longitudinal direction. In the cutter 20, when the cold draw bar A is located in the longitudinal direction, the cut length is easy, but when the cut material B is arranged in the longitudinal direction after cutting, the process line becomes long. Therefore, after the cutting, the cutting material B is rotated and arranged in the transverse direction perpendicular to the longitudinal direction.

A conveying step of conveying the cutting material B rotated in the transverse direction in the rotation step to the facer 50 through the conveying conveyor 40 is performed (S4).

On the other hand, the cutting material B transferred in the transferring step carries out a chamfering step of machining both ends in the chamfering machine 50 (S5). In the beaker 50, a process called deburring or chamfering is performed. After machining is performed in the chamfering machine 50, the cutting material B can be manufactured with more accurate dimensions.

A weight measuring step of measuring the weight of the cut material B is performed by moving the cut material B processed in the chamfering step to the weighing machine 60 by using the robot arm 70 at step S6. Since the weight measuring step measures the weight of the cut material (B) that has been processed to a predetermined dimension while passing through the cutting step and the chamfering step, weight measurement for the cut material (B) with a more accurate dimension becomes possible.

Meanwhile, the weight measured in the weight measuring step is compared with a predetermined set weight range to perform a sorting step of selecting a normal state and a defective state (S7). The set weight range is a value including an error and is set in advance by the manager through the control unit 100. [

Here, in the selecting step, if the weight measured in the weight measuring step is out of the normal weight range, it is determined to be the defective cutting material (B '). If the weight measured in the weight measuring step is within the normal weight range, It is judged that it is the material B ''.

The defective cutting material (B ') determined to be defective in the selection step is transferred to the reject box (64) by using the robot arm (70), and the normal cutting material (B' The robot arm 70 is used to carry and carry the stacking step (S8).

In the loading step, the normal cutting material B '' is first transferred to the guide unit 82 using the robot arm 70.

When the normal cutting material (cold drawing bar) B '' is transferred to the guide unit 82, the sensor 84 installed in the guide unit 82 is moved to the normal cutting material B ' ').

Here, the normal cut material is guided by the guide unit 82 and collected in the lift 86 until the number of the normally cut materials B " detected by the sensor 84 reaches the set number.

The control unit 100 judges whether or not the number of normal cut materials B " detected by the sensor 84 reaches a predetermined set number.

The control unit 100 moves the lift 86 down to the container 90 when the number of the normally cut materials B " detected by the sensor 84 reaches the set number. When the lift 86 is moved downward, the normal cutting material B " collected in the lift 86 is loaded into the container 90. [

The normal cut material B " loaded on the container 90 is conveyed by the roller conveyor unit 92, and then the normal cut material B " is used for cold forging.

According to the embodiment of the present invention having the above-described configuration, not only the dimensions of the cold draw bar in the cutting step and the chamfering step are accurately set, but also the weight is measured through the weighing machine after the dimension is correctly set, And weight can be manufactured for cold forging. Therefore, during the cold forging process of the cold draw bar, there is no gap or burr between the cold forging die and the cold draw bar, so that the cold forging process can be performed more easily and accurately.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10: feeder 20: cutter
30: rotation mechanism 40: conveying conveyor
50: cotton picking machine 60: weighing machine
70: Robot arm 82: Guide unit
84: Sensor 86: Lift
90: Container

Claims (8)

A supply stand for supplying a cold draw bar made in the cold drawing process in the longitudinal direction;
A cutter for cutting the cold draw bar supplied from the supply side to a predetermined set length;
A rotary mechanism for rotating the cold draw bar cut at the cutter at a predetermined angle so as to be positioned in a direction perpendicular to the longitudinal direction in the longitudinal direction;
A conveying conveyor for conveying the cold drawn bar rotated by the rotating mechanism;
A chamfer for machining both ends of the cold draw bar conveyed by the conveying conveyor;
A weighing machine for measuring the weight of the cold draw bar machined in the pickling machine and comparing the measured weight with a preset normal weight range to select between normal and defective;
A control unit for controlling the operation of the feeder, the cutter, the rotating mechanism, the conveying conveyor, the picker and the weighing machine,
And a robot arm for transferring the cold draw bar processed in the chamfering machine to the weighing machine and sorting and moving the cold draw bar according to a result determined by the weighing machine,
A guide unit for feeding the cold draw bar determined to be normal by the weighing machine,
Further comprising a lift for collecting the cold draw bar conveyed through the guide unit and conveying the cold draw bar in the vertical direction. delete The method according to claim 1,
And a reject box for collecting a cold draw bar determined to be defective in the weight measuring device. delete The method according to claim 1,
Further comprising: a sensor installed on at least one of the guide unit and the lift to measure the number of the cold drawing bars. The method of claim 5,
Wherein the control unit moves the lift to a container to load the cold draw bar when the number of the sensors measured by the sensor reaches a predetermined set number. A feeding step of feeding a cold drawing bar made by a cold drawing process in the longitudinal direction;
A cutting step of cutting the cold draw bar supplied in the supplying step to a predetermined length;
A rotating step of rotating the cold draw bar cut at the cutting step at a predetermined angle;
A conveying step of conveying the cold draw bar rotated in the rotating step through a conveying conveyor;
A chamfering step of machining both ends of the cold draw bar conveyed in the conveying step;
A weighing step of measuring the weight of the cold draw bar processed in the chamfering step;
Comparing the weight measured in the weighing step with a predetermined set weight range to select a normal and a defective;
And a loading step of transferring and loading the cold draw bar determined to be normal in the sorting step,
The loading step may include:
Detecting a number of cold draw bars determined to be normal;
Collecting the cold draw bar on the lift until the sensed number reaches a predetermined set number;
And moving the lift in the vertical direction to load the cold drawn bars collected in the lift into the container when the sensed number reaches the set number. delete

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