KR101418052B1 - Apparatus for assorting steel rods - Google Patents

Abstract

Provided is a bar dividing device capable of sorting bars having surface defects while conveying bars. The bar dividing apparatus according to one embodiment of the present invention comprises: i) a bar-shaped rotary transfer unit for rotating a bar to convey the bar while exposing a side surface of the bar to the outside, ii) a surface inspection for detecting a surface defect of the bar during rotation of the bar And iii) a bar dividing unit for sorting bars by a signal of a surface inspection unit depending on whether or not the bars have surface defects.

Bars, surface defects, protrusions, rotary transfer rolls, laser

Description

{APPARATUS FOR ASSORTING STEEL RODS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bar dividing device, and more particularly, to a bar dividing device capable of sorting bars having surface defects while conveying bars.

In general, bars are used in various industrial fields such as motor shaft. Rigorous control of the quality of bars is provided by analyzing the roundness, straightness, outer diameter, surface flatness and surface defects of the bars to provide the bars that can be used in various industries.

When the bars have surface defects, it is necessary to separate only the bars having surface defects separately to eliminate surface defects. Conventionally, a person checks the surface defects of the bar with the naked eye, paints the surface with defects, and classifies the bars having surface defects separately. In this case, however, it is not only time-consuming but also inaccurate the classification operation itself since a person must visually check the surface defects of the bar with naked eyes.

And to provide a bar dividing device capable of automatically classifying a bar having surface defects while rotating.

The bar dividing apparatus according to one embodiment of the present invention comprises: i) a bar-shaped rotary transfer unit for rotating a bar to convey the bar while exposing a side surface of the bar to the outside, ii) a surface inspection for detecting a surface defect of the bar during rotation of the bar And iii) a bar dividing unit for sorting bars by a signal of a surface inspection unit depending on whether or not the bars have surface defects.

The bar rolling conveying unit includes a pair of rotary conveying rollers positioned side by side, the rotary conveying rolls including protrusions contacting the bar, and the bars can be positioned and transported between the rotary conveying rolls. The length of the rotary transfer roll may be two to five times the length of the bar. The projecting portion may be formed to extend in a direction forming an acute angle to intersect with the conveying direction of the bar, and the acute angle may be 30 to 60 degrees.

The cross section cut in the direction intersecting with the longitudinal direction of the projection may include two sides facing each other with mutual inclination. The cross section may be trapezoidal.

When the pair of rotary transport rolls rotate in the same direction with each other, the protrusions can be formed in the respective rotary transport rolls in the same direction with each other. When the pair of rotary transport rolls rotate in mutually different directions, the protrusions can be formed in the respective rotary transport rolls in mutually different directions.

The pair of rotary transport rolls rotate inwardly thereof and the protrusion formed on the pair of rotary transport rolls can extend toward the side where the barrel enters the barrel rotary transport unit. The pair of rotary transport rolls are rotated in the outward direction, and the protruding portions formed in the pair of rotary transport rolls can extend toward the side where the barrel escapes from the barrel rotary transport unit.

Each rotary transfer roll may comprise: i) a core portion made of metal and ii) a shell portion made of rubber material surrounding the core portion. The protrusion may be integrally formed with the shell portion, and may be formed in a spiral shape on the surface of the shell portion.

The surface defective portion of the bar can be laser marked before it is transported to the bar conveying unit. The bar grouping unit may include a conveyor belt that operates in a direction intersecting the conveying direction of the bar to classify the bar.

It is possible to automatically classify the bars with surface defects while transporting them, thereby improving productivity while reducing manufacturing costs.

Also, even if the bar is rotated only once by using the bar rotation transfer part, the bar defect with surface defects can be classified by automatically recognizing the surface defect of the bar.

If any part is referred to as being "on" another part, it may be directly on the other part or may be accompanied by another part therebetween. In contrast, if one refers to "directly above" another, no other part is intervened therebetween.

It is to be understood that the terms first, second and third are used to describe various parts, components, regions, layers and / or sections, but are not limited thereto. These terms are only used to distinguish any moiety, element, region, layer or section from another moiety, moiety, region, layer or section. Thus, a first portion, component, region, layer or section described below may be referred to as a second portion, component, region, layer or section without departing from the scope of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms as used herein include plural forms as long as the phrases do not expressly express the opposite meaning thereto. Means that a particular feature, region, integer, step, operation, element and / or component is specified, and that other specific features, regions, integers, steps, operations, elements, components, and / And the like.

Terms representing relative space, such as "below "," above ", and the like, may be used to more easily describe the relationship to another portion of a portion shown in the figures. These terms are intended to include other meanings or acts of the apparatus in use, as well as intended meanings in the drawings. For example, when inverting a device in the figures, certain parts that are described as being "below" other parts are described as being "above " other parts. Thus, an exemplary term "below" includes both up and down directions. The device can be rotated 90 degrees or rotated at different angles, and the term indicating the relative space is interpreted accordingly.

Unless otherwise defined, all terms including technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Commonly used predefined terms are further interpreted as having a meaning consistent with the relevant technical literature and the present disclosure, and are not to be construed as ideal or very formal meanings unless defined otherwise.

The embodiments of the present invention described with reference to the perspective and sectional views illustrate ideal embodiments of the present invention. As a result, various variations of the illustration, for example variations in the manufacturing method and / or specification, are expected. Thus, the embodiment is not limited to any particular form of the depicted area, but includes modifications of the form, for example, by manufacture. For example, the regions shown or described as being flat may have characteristics that are generally coarse / rough and nonlinear. Also, the portion shown as having a sharp angle may be rounded. Thus, the regions shown in the figures are merely approximate, and their shapes are not intended to depict the exact shape of the regions, nor are they intended to limit the scope of the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to FIGS. 1 to 7. FIG. These embodiments are only for illustrating the present invention, and the present invention is not limited thereto.

FIG. 1 schematically shows a bar splitting apparatus 100 according to an embodiment of the present invention. The structure of the apparatus for dividing a barrel 100 shown in FIG. 1 is merely for illustrating the present invention, and the present invention is not limited thereto. Accordingly, the structure of the apparatus for dividing bar stock 100 can be variously modified.

As shown in Fig. 1, the bar dividing apparatus 100 includes a bar rotation transfer unit 10, a surface inspection unit 20, and a bar dividing unit 30. As shown in Fig. And may further include a bar conveying unit 40 and a control unit 50. [ It is possible to classify the bar (B) having surface defects by using the bar dividing device (100).

As shown in Fig. 1, bar bar B is conveyed by bar conveying unit 40 and introduced into bar conveying conveying unit 10. The barrel B can be cut to an appropriate length and introduced into the barrel rotation transfer unit 10. [ The bar conveying unit 40 is controlled by the control unit 50. As the bar conveying unit 40, a conveyor belt may be used. Foreign matter adhering to the surface of the barrel B can be removed by using an air knife (not shown) or the like during the feeding of the barrel B to the barrel rotation transfer unit 10. [

As shown in Fig. 1, the barrel rotary feed unit 10 includes a rotary feed roll 101 and a drive motor 103. As shown in Fig. The driving motor 103 is coaxially connected to the rotary feed roll 101 to rotate the rotary feed roll 101. The drive motor 103 receives a control signal from the control unit 50 and rotates the rotary transporting roll 101. The rotary conveying roll 101 rotates while conveying the bar B to expose the side of the bar B to the outside. The surface defect m of the bar B is exposed during the feeding of the bar B by the rotary feed roll 101. [ It is possible to detect the surface defect while conveying the bar (B) instead of detecting the surface defect while rolling the bar (B). The structure of the rotary feed roll 101 will be described later in more detail with reference to FIG.

As shown in Fig. 1, the surface inspection unit 20 includes a CCD (charged coupled device) camera 201 and a light emitting unit 203. [ A plurality of light emitting units 203 may be provided so that the CCD camera 201 can efficiently capture all sides of the bar B. Therefore, the CCD camera 201 can easily pick up the surface defect m provided in the bar B. For example, in the case of marking the surface defect m with a laser, the surface defect (m) portion may be slightly burnt and appear darker than the peripheral portion thereof. Since the bar steel (B) is a metal material, the light reflectance is relatively large, while the surface defect (m) is slightly discolored. Therefore, when irradiating the bar B with the light emitting portion 203, the CCD camera 201 easily recognizes the surface defect (m) portion due to the difference in light reflectance, and can easily pick up the surface defect m . The length of the rotary feed roll 101 capable of at least one revolution of the bar B is set to be equal to or longer than the recognition section length of the CCD camera 201. [ The CCD camera 201 can accurately pick up the surface defect m of the bar B during the feeding of the bar B by the rotary feed roll 101. [

The control unit 50 receives a signal from the CCD camera 201 to confirm whether or not the surface of the bar B has a surface defect m and determines whether the surface of the bar B having no surface defect m and the surface defect m ) Are grouped. Since the process of confirming whether or not the surface defect (m) of the bar B is confirmed by the control unit 50 by the CCD camera 201 can be easily understood by those skilled in the art, The description will be omitted.

The bar-like bar B passing through the bar-like rotary transfer unit 10 is transferred to the bar- The bar dividing unit 30 divides the bar B by a signal from the surface inspection unit 20 depending on whether or not the bar B has surface defects m. As shown in Fig. 1, using a conveyor belt 301, bar bars B having surface defects m and bar bars B having no surface defects m on the front side and the rear side thereof, Can be classified. The detailed structure of the barrel sorting unit 30 will be described in detail later with reference to FIG.

Fig. 2 schematically shows a barrel B before it is conveyed to the barrel sorter 100 of Fig. As shown in Fig. 2, the bar (B) may have a surface defect (m).

If the bar (B) is provided with surface defects (m), product failure may occur during reprocessing of bar (B). Therefore, the quality of the bar B can be improved by separately separating the bar B having the surface defects m and removing the surface defects m.

The surface defect (m) portion of the bar (B) can be displayed by laser marking or the like. Since the surface defect (m) region can not be displayed over the entire circumference of the bar (B), only the surface defect (m) region can be marked with a laser. The surface of the bar (B) is coated with anti-rust oil and subjected to heat treatment in a subsequent process, so that surface defects (m) can not be marked with paint or ink. Therefore, it is preferable to mark the surface defect (m) portion of the bar (B) with a laser. Particularly, in the case of using a laser, all the foreign matters adhering to the surface of the bar (B) such as anti-corrosive oil, rust, paint, or ink can be burned and removed.

Hereinafter, the structure of the barrel rotation transfer unit included in the bar dividing device according to the first to fourth embodiments of the present invention will be described with reference to FIGS. 3 to 6. FIG.

3 is an enlarged schematic view of the barrel rotation transfer unit 10 of Fig. In the enlargement circle in FIG. 3, the cross-sectional shape of the projection 1015 cut in the direction intersecting with the longitudinal direction of the projection 1015 is enlarged.

As shown in Fig. 3, the barrel rotary feed unit 10 includes a pair of rotary feed rolls 101 and a drive motor 103. As shown in Fig. The pair of rotary transport rolls 101 are arranged side by side along the y-axis direction. Between the pair of rotary transport rolls 101, the bar B is positioned and rotated while being transported in the + x axis direction, that is, the linear arrow direction. The barrel B is positioned between the pair of rotary transport rolls 101 and can be stably transported.

The rotary feed roll 101 includes a core portion 1011 and a shell portion 1013. [ The shell portion 1013 surrounds the core portion 1011. The driving motor 103 is connected to the core unit 1011 to rotate the rotary feed roll 101. The core portion 101 is made of a metal material and appropriately maintains the strength of the rotary feed roll 101. For example, the core portion 101 can be made of iron. The shell part 1013 is made of a rubber material and can protect the rotary feed roll 101 from an external impact. For example, the shell portion 1013 can be made of urethane.

The protruding portion 1015 can be formed on the surface of the shell portion 1013 in a spiral shape. The protruding portion 1015 contacts the barrel B. Since the projecting portion 1015 has a spiral shape, the bar B can be conveyed in the direction of the straight arrow by the rotation of the rotary feed roll 101. [ The bar B is supported by the protrusion 1015 without being slid by the friction between the protrusion 1015 and the bar B and is conveyed while being rotated.

The protrusion 1015 may be formed integrally with the shell 1013. That is, the protruding portion 1015 can be manufactured by cutting the shell portion 1013. In this case, since the adhesion between the protruding portion 1015 and the cell portion 1013 is good, the protruding portion 1105 does not come off from the shell portion 1013 well. Therefore, the durability of the rotary feed roll 101 can be improved.

As shown in the enlargement circle in Fig. 3, the cross section of the projection 1015 has a trapezoidal shape. Alternatively, the protrusions may be formed into a triangular shape or another polygonal shape. The cross section of the protrusion 1015 includes two first sides 1015a and a second side 1015b. The two first sides 1015a are inclined and facing each other. The second side 1015b contacts the bar B and interconnects the two first sides 1015a. Since the protruding portion 1015 has the shape as described above, the bar B can be supported while being stably supported.

The length 101L of the rotary feed roll 101 is maintained at 2 to 5 times the length BL of the bar B as shown in Fig. It is necessary to expose the side surface of the bar B to the outside, that is, the + z-axis direction, while the bar B is rotated and conveyed by the rotary feed roll 101 so that the surface inspection unit 20 (shown in Fig. 1) The surface defect m can be detected. Therefore, the length 101L of the rotary feed roll 101 should be sufficient so that the bar B is completely rotated by one or more rotations. If the length 101L of the rotary feed roll 101 is less than twice the length BL of the bar B, it is difficult for the bar B to make one complete revolution so that the surface defect m of the bar B It is difficult to detect. On the contrary, when the length 101L of the rotary feed roll 101 exceeds 5 times the length BL of the bar B, the area occupied by the bar dividing device 100 becoming too long becomes large, It takes. Accordingly, the bar (B) is suitably cut and held at the above-mentioned length ratio.

As shown in Fig. 3, the pair of rotary transport rolls 101 includes protrusions 1015 formed to face in the same direction, i.e., all the lower left. In this case, the pair of rotary transport rolls 101 are rotated counterclockwise in the same direction, that is, as indicated by the arrow, so that the bar B can be transported in the direction of the straight arrow. In order to feed the bar B in the + x axis direction, the rotational direction of the rotary feed rolls 101 and the forming direction of the protrusion 1015 satisfy a certain condition. 4 to 6, a modified structure of the bar rotation transfer unit included in the bar dividing device according to the second to fourth embodiments of the present invention will be described in more detail.

4 schematically shows a barrel rotation transfer unit 12 included in the barrel sorting device according to the second embodiment of the present invention. 4, the plan view of the rotary transport rolls 121 and 101 as viewed in the + z-axis direction is shown in an enlarged manner. Since the structure of the barrel rotation transfer unit 12 shown in FIG. 4 is similar to that of the barrel rotation transfer unit 10 of FIG. 3, the same reference numerals are used for the same parts, and a detailed description thereof will be omitted.

As shown in Fig. 4, the bar-shaped rotary feed unit 12 includes a first rotary feed roll 121 and a second rotary feed roll 101. As shown in Fig. The first rotary feed roll 121 includes a first protrusion 1215 and the second rotary feed roll 101 includes a second protrusion 1015. [ The first protrusions 1215 and the second protrusions 1015 are formed symmetrically close to each other between the first rotary transporting roll 121 and the second rotary transporting roll 101. Therefore, the rotary feed rolls 101 and 121 rotate in mutually different directions in order to feed the bar B in the + x axis direction, that is, in the direction of the straight arrow. That is, as shown by the arrow in Fig. 4, the first rotary transporting roll 121 rotates clockwise while the second rotary transporting roll 101 rotates counterclockwise. Thus, when the rotary transporting rolls 101 and 121 rotate in mutually different directions, the protruding portions 1015 and 1215 are formed in the rotary transporting rolls 101 and 121, respectively, in mutually different directions.

The protrusions 1015 and 1215 formed in the rotary transfer rolls 101 and 121 which rotate in the inner direction of the rotary transfer rolls 101 and 121, And extends toward the side (-x-axis direction) coming into the transfer unit 12. As a result, the bar B can be supported while being supported by the projections 1015 and 1215 so that the bar B does not slip.

As shown in the enlargement circle in Fig. 4, the second protruding portion 1015 is elongated in one direction. The direction in which the second protruding portion 1015 extends intersects the conveying direction (+ x-axis direction) of the bar B shown by the arrow while forming an acute angle?. Here, the acute angle [theta] may be 30 [deg.] To 60 [deg.]. When the acute angle [theta] is smaller than 30 [deg.] Or larger than 60 [deg.], It is difficult to feed the bar B. Therefore, the second protrusion 1015 is formed so as to have the angular range described above.

Fig. 5 schematically shows a barrel rotation transfer unit 13 included in the bar dividing device according to the third embodiment of the present invention. Since the structure of the barrel rotation transfer unit 13 shown in Fig. 5 is similar to that of the barrel rotation transfer units 10 and 12 of Figs. 3 and 4, the same reference numerals are used for the same parts and a detailed description thereof is omitted do.

As shown in FIG. 5, the protrusions 1215 and 1315 formed respectively in the first rotation feed roll 121 and the second rotation feed roll 131 are formed in the same direction. Therefore, as shown by the arrows, the first rotary feed roll 121 and the second rotary feed roll 131 are both rotated in the clockwise direction to feed the bar B in the direction of the straight arrow, that is, the + x axis direction .

Fig. 6 schematically shows a barrel rotation transfer unit 14 included in the bar dividing device according to the fourth embodiment of the present invention. Since the structure of the barrel rotation transfer unit 14 shown in Fig. 6 is similar to that of the barrel rotation transfer units 10 and 13 of Figs. 3 and 5, the same reference numerals are used for the same parts and a detailed description thereof is omitted do.

As shown in Fig. 6, the barrel rotation transfer unit 14 includes a first rotary feed roll 101 and a second rotary feed roll 131. The first rotary feed roll 101 includes a first protrusion 1015 and the second rotary feed roll 131 includes a second protrusion 1315. [ The first protrusion 1015 and the second protrusion 1315 are formed symmetrically with respect to each other between the first rotary transfer roll 101 and the second rotary transfer roll 131. Therefore, the rotary feed rolls 101 and 131 rotate in mutually different directions in order to feed the bar B in the + x axis direction, that is, in the direction of the straight arrow. That is, as shown by the arrow in Fig. 6, the first rotary transporting roll 101 rotates counterclockwise while the second rotary transporting roll 131 rotates clockwise. As such, when the rotary transporting rolls 101 and 131 rotate in mutually different directions, the protruding portions 1015 and 1315 are formed in the rotary transporting rolls 101 and 131, respectively, in mutually different directions.

The protrusions 1015 and 1315 formed on the rotary transfer rolls 101 and 131 which rotate in the outer direction of the rotary transfer rolls 101 and 131 are formed in a state And extends toward the side (+ x-axis direction) exiting from the transfer unit 12. As a result, the bar B can be supported while being supported by the projections 1015 and 1315 so that the bar B does not slip.

7 schematically shows an enlarged view of the bar sorting unit 30 of Fig. The structure of the bar sorting unit 30 of Fig. 7 is merely for illustrating the present invention, and the present invention is not limited thereto. Therefore, the structure of the bar-like dividing unit 30 can be modified into another form.

As shown in Fig. 7, the barrel sorting unit 30 includes a conveyor belt 301. As shown in Fig. The conveyor belt 301 includes a belt 3013 and a pair of drive shafts 3011. The conveyor belt 301 operates in the direction (y-axis direction) intersecting the conveying direction of the bar steel (+ x-axis direction) to sort the bar (B).

The rod dividing unit 30 is driven in the + y-axis direction and the -y-axis direction according to the signal of the control unit 50 (shown in Fig. 1, A bar (B) and a bar (B ') having no surface defects are sorted. For example, when the bar B having the surface defect m is placed on the belt 303, the drive shaft 301 rotates in the clockwise direction to move the belt 303 in the + y axis direction, B are stacked in front of the bar sorting unit 30. On the other hand, when the bar B 'having no surface defect m is placed on the belt 303, the drive shaft 301 rotates counterclockwise to move the belt 303 in the -y axis direction, B are mounted on the back of the bar sorting unit 30.

It will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the following claims.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a barb sorting apparatus according to a first embodiment of the present invention; FIG.

Fig. 2 is a schematic view of a bar introduced into the bar dividing device of Fig. 1. Fig.

Fig. 3 is a schematic view of the barrel rotation transfer unit of Fig. 1;

FIG. 4 is a schematic view of a bar rotation transfer unit included in the bar dividing device according to the second embodiment of the present invention.

5 is a schematic view of a bar rotation transfer unit included in the bar dividing device according to the third embodiment of the present invention.

FIG. 6 is a schematic view of a bar conveying and conveying unit included in the bar dividing device according to the fourth embodiment of the present invention.

Fig. 7 is a schematic view of the bar sorting unit of Fig. 1. Fig.

Description of the Related Art

100. Bar dividing device 10. Bar rolling transfer unit

20. Surface Inspection Unit 30. Bar Stacking Unit

40. Bar conveying unit 50. Control unit

101, 121, 131. The rotary feed roll

B. bar steel m. Surface defect

Claims (13)

A bar conveying unit including a pair of rotary conveying rolls arranged side by side while rotating the barrel to convey the barrel while exposing a side surface of the barrel to the outside, the rotary conveying rolls including a protrusion contacting the barrel, A surface inspection unit which detects surface defects of the bar steel while the bar steel is rotating, and A bar dividing unit for dividing the bars by a signal of the surface inspection unit according to presence or absence of surface defects of the bar, Wherein the bars are positioned and transported between the rotary transfer rolls. delete The method according to claim 1, Wherein the length of the rotary transfer roll is two to five times the length of the bar. The method according to claim 1, Wherein the projecting portion is formed so as to extend in an acute angle direction intersecting with the conveying direction of the bar steel, and the acute angle is 30 to 60 degrees. The method according to claim 1, Wherein the cross section of the protrusions in the direction intersecting the longitudinal direction of the protrusions includes two sides facing each other with an inclination. 6. The method of claim 5, Wherein the cross section is a trapezoidal shape. The method according to claim 1, Wherein the protrusions are formed in the respective rotary transport rolls in the same direction with respect to each other when the pair of rotary transport rolls rotate in the same direction with each other. The method according to claim 1, Wherein the protrusions are formed in the respective rotary transport rolls in mutually different directions when the pair of rotary transport rolls are rotated in mutually different directions. The method according to claim 1, Wherein the pair of rotary transport rolls are rotated inwardly, and protrusions formed on the pair of rotary transport rolls extend toward a side where the barrel enters the barrel rotation transport unit. The method according to claim 1, Wherein the pair of rotary transfer rolls are rotated in the outward direction and the protrusions formed in the pair of rotary transfer rolls extend toward the side where the barrel is withdrawn from the bar rotation transfer unit. The method according to claim 1, Each of the rotary transfer rolls A core portion made of metal and A shell portion made of a rubber material surrounding the core portion, / RTI > Wherein the projecting portion is formed integrally with the shell portion and is formed in a spiral shape on the surface of the shell portion. The method according to claim 1, Wherein the surface defective portion of the bar is marked with a laser before being conveyed to the bar conveying unit. The method according to claim 1, And the bar dividing unit includes a conveyor belt that operates in a direction intersecting the conveying direction of the bar to sort the bars.

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