KR20170013708A

KR20170013708A - Burr grinding apparatus for press trimmed metal panel

Info

Publication number: KR20170013708A
Application number: KR1020150106765A
Authority: KR
Inventors: 강태진
Original assignee: 강태진
Priority date: 2015-07-28
Filing date: 2015-07-28
Publication date: 2017-02-07

Abstract

According to the present invention, a burr grinding apparatus for a press trimmed metal panel comprises: a frame; a drive motor installed in the frame; a conversion gear rotated by the drive motor; a transfer roller installed in a driving shaft dynamically connected to the conversion gear, and integrally rotated along with the driving shaft; a grinding gear engaged with the conversion gear to be rotated, and rotated faster than the number of rotation of the conversion gear; and a rotation grinding member installed on the same axis of a rotation axis of the grinding gear, and removing burr of an object which is transferred by the transfer roller.

Description

Technical Field The present invention relates to a burr grinding apparatus for press-trimmed metal panel,

The present invention relates to an apparatus for effectively polishing and removing burrs formed on one side of a steel plate workpiece cut by a press.

Generally, a pressing apparatus is widely used by a method of processing a metallic material such as a low-carbon steel or stainless steel of a thin plate. The press apparatus is equipped with upper and lower dies and presses the upper and lower dies with a hydraulic or mechanical press in a state in which a plate-shaped metal material is charged in the dies, thereby producing a product in the form of the die. Such a press apparatus is capable of processing a single finished product by successively arranging a plurality of lines in a row and performing a plurality of processing steps.

An example of a manufacturing method of processing a plate-like metal material with such a press apparatus is disclosed in Korean Patent Publication No. 2014-0146235.

However, after performing a process of forming holes or trimming the edge portion in the process of forming a plate-shaped metal material by using a press, sharp burrs are formed in a single direction on the cut portion by the cutting edge of the metal mold, Is generally formed. Such sharp burrs can damage the operator's body and therefore have a very negative effect on the safety of the press working site. Therefore, there is a need to effectively remove the burrs of such press workpieces. Generally, a user manually removes burrs by sandpaper or the like before bending the press-formed workpiece in which the burr is formed, but this operation is also troublesome and dangerous. In addition, when the sandpaper is removed, the surface roughness of the surface of the workpiece becomes uneven and the surface gloss becomes very poor.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an apparatus capable of effectively removing burrs of press-cut workpieces by performing simultaneous transfer and polishing of workpieces by a single drive motor There is.

According to an aspect of the present invention, there is provided a bar-polishing apparatus for a press-cut steel plate work, comprising: a frame;

A drive motor installed in the frame;

A conversion gear rotated by the driving motor;

A transfer roller installed on a drive shaft connected to the conversion gear and connected to the drive shaft to rotate integrally with the drive shaft;

A polishing gear rotating in engagement with the conversion gear and rotating faster than the rotation number of the conversion gear; And

And a rotating abrasive member provided coaxially with the rotating shaft of the abrasive gear and removing burrs of the workpiece conveyed by the conveying roller.

Wherein the transfer roller supports an upper surface of the workpiece,

The rotating abrasive member is preferably configured to remove burrs formed on the lower surface of the workpiece.

It is preferable that a friction structure having an elastic restoring force is provided on the surface of the conveying roller.

It is preferable that a flexible blade having flexibility is pressed and fixed between a pair of rigid-body blades arranged in the direction of the rotation axis of the abrasive gear.

Wherein the plurality of rigid blades are provided along the circumferential direction of the rotary polishing member,

Preferably, the flexible blades are provided with a plurality of separating grooves so as to be separated from each other in the longitudinal direction of the rotating abrasive member.

And a guide member for pressing the workpiece to be polished by the rotating abrasive member so as to prevent the workpiece from being lifted upward.

The burr polishing apparatus of the press-cut steel plate workpiece according to the present invention is configured so that the conveying roller and the abrasive roller are operated simultaneously by one driving motor, so that the structure is simple and the burr of the workpiece can be effectively polished and removed to provide. Further, as in the preferred embodiment of the present invention, when the plurality of grooves are provided so that the flexible blades of the rotating abrasive member are separated from each other in the longitudinal direction thereof and can be independently polished, the burrs formed in a three- There is an advantage that it can be removed. Further, when the guide member is provided as in the preferred embodiment of the present invention, it is possible to effectively prevent upward movement of the workpiece rotated by the rotating abrasive member.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic plan view of a burr polishing apparatus of a press cut steel plate workpiece according to a preferred embodiment of the present invention.
2 is a sectional view taken along the line II-II shown in Fig.
3 is a sectional view taken along the line III-III shown in Fig.
4 is a sectional view taken along the line IV-IV shown in Fig.
5 is a view for explaining the structure of the rotating abrasive member shown in Fig.
6 is a sectional view taken along the line VI-VI shown in Fig.
FIG. 7 is a view showing an example of the workpiece shown in FIG. 2. FIG.
Fig. 8 is a view corresponding to Fig. 4, showing another embodiment.

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

1 to 8, a bar polishing apparatus 10 (hereinafter referred to as "bar polishing apparatus") of a press-cut steel plate work according to a preferred embodiment of the present invention includes a frame 20, a driving motor 30, A drive shaft 50, a feed roller 55, a grinding gear 60, and a rotating abrasive member 70. The abrasive grains 70 and the rotating abrasive members 70 are used as the abrasive grains.

The frame 20 is a skeleton in which main components to be described later are installed. The frame 20 may be made of a metal material such as carbon steel. The frame 20 has an upper surface parallel to the paper surface.

The drive motor (30) is installed in the frame (20). The drive motor 30 may be a DC motor or an AC motor. The drive motor 30 is provided with an output shaft 32 in a direction parallel to the paper surface. A decelerator (not shown) may be installed between the output shaft 32 and the drive motor 30. [ It is preferable that the driving motor 30 is capable of adjusting the number of revolutions.

The conversion gear 40 is a gear installed to be rotated by the driving motor 30. [ The conversion gear 40 may be installed on the output shaft 32 of the drive motor 30. [ Therefore, the conversion gear 40 is rotated integrally with the output shaft 32. [ A plurality of teeth (gear portions) are formed on the outer periphery of the conversion gear 40.

The drive shaft (50) is an axis rotated integrally with the conversion gear (40). The drive shaft 50 is installed above the frame 20 and is rotatably mounted to the frame 20. The drive shaft (50) is installed in a direction parallel to the output shaft (32) of the drive motor (30). The driving shaft 50 is provided with a pulley 52 and may be connected to the conversion gear 40 by a belt 53. It is preferable that the size of the pulley 52 is formed so that the number of revolutions of the drive shaft 50 is smaller than the number of revolutions of the conversion gear 40.

The drive shaft (50) is provided with a feed roller (55). A plurality of conveying rollers 55 may be provided. The conveying roller 55 rotates integrally with the driving shaft 50. The transfer roller 55 supports the upper surface of the workpiece 100. A supporting roller 58 may be provided on the opposite side of the conveying roller 55 with the workpiece 100 conveyed by the conveying roller 55 therebetween. The support roller 58 is rotatably installed on the frame 20. [ The workpiece 100 is loaded between the conveying roller 55 and the supporting roller 58. The support roller 58 supports the lower surface of the workpiece 100 in this embodiment. A friction structure 57 having an elastic restoring force may be installed on the surface of the conveying roller 55 as shown in FIG. The friction structure 57 may be made of a material such as synthetic resin or rubber. The friction structure 57 may be adhered to the conveying roller 55, or may be coupled in a forced or double ejection manner. The friction structure 57 enhances the transfer efficiency by increasing the frictional force with the workpiece 100 conveyed by the transfer roller 55. One or a plurality of the conveying rollers 55 may be provided. The surface of the friction structure 57 may further have a concavo-convex structure to increase the coefficient of friction with the workpiece 100. It is not necessary that the conveying roller 55 and the supporting roller 58 correspond one to one.

The abrasive gear 60 is installed to rotate in engagement with the conversion gear 40. The abrasive gear 60 is installed to rotate faster than the rotation speed of the conversion gear 40 due to the difference in gear ratio. It is preferable that the ratio of the number of revolutions of the abrasive gear 60 and the conversion gear 40 is at least 3: 1 or more. For example, when the conversion gear 40 rotates at 60 rpm, the abrasive gear 60 rotates at 180 rpm. Further, it is preferable that the rotation speed of the conveying roller 55 is smaller than the rotation speed of the conversion gear 40. For example, the ratio of the number of revolutions of the abrasive gear 60 to the conveying roller 55 may be about 5: 1.

The rotating abrasive member 70 is provided coaxially with the rotating shaft 72 of the abrasive gear 60. The rotating abrasive member 70 is a component for removing burrs of the workpiece 100 conveyed by the conveying roller 55.

More specifically, the rotating abrasive member 70 includes a rotating shaft 72, a rotating body 74, a rigid blade 76, and a flexible blade 78.

The rotary shaft (72) is a shaft provided to rotate integrally with the rotation of the abrasive gear (60). The rotating body 74 is a cylindrical structure and may be coupled with the rotating shaft 72 in a manner such as a bolt or a rivet or a fitting or interference fit.

The rigid blade 76 is a rod-like structure. The rigid blade 76 may be coupled to the rotating body 74 by welding. Meanwhile, the rigid blade 76 and the rotating body 74 may be integrally formed with each other. The rigid blade 76 may directly remove a burr present in the workpiece 100 and may optionally be used as a structure for fixing the flexible blade 78 to be described later. The rigid blades 76 may be arranged along the circumference of the rotating body 74 in pairs. The rigid blade 76 has a plurality of bladed blade fixing holes 77 for pressing and fixing a flexible blade 78 to be described later.

The flexible blade 78 is installed between the pair of rigid-body blades 76 with one end inserted. The flexible blade 78 is configured such that one end of the flexible blade 78 can be bent when an external force acts, such as carbon steel or sandpaper of a thin plate. One end of the flexible blade 78 is inserted between a pair of adjacent rigid edges 76. The adjoining pair of rigid-body blades 76 are coupled to each other by a structure such as a bolt or a rivet through the flexible blade fixing hole 77 facing each other. The free end of the flexible blade 78 may be provided with a plurality of separation grooves 79 so as to be separated from each other in the longitudinal direction of the rotary abrasive member 70. That is, the free end of the flexible blade 78 has a plurality of separation grooves 79 formed to be spaced along the longitudinal direction of the rotation shaft 72. When the flexible blade 78 is rotated together with the rotary shaft 72, the separation groove portion 79 has a degree of freedom to naturally follow the three-dimensional shape when the surface of the workpiece 100 to be polished has a three- It is prepared to raise.

The rotating abrasive member 70 thus formed removes a burr formed on the lower surface of the work 100 in this embodiment. Since the burr formed by the metal mold is formed only on one side of the workpiece 100 in the direction, only the burrs of the lower surface are removed as in this embodiment.

The workpiece 100 may further include a guide member 90 for pressing the workpiece 100 upward so as to prevent the workpiece 100 from being lifted while being polished by the rotating abrasive member 70. The guide member 90 may be rotatably mounted on the drive shaft 50 through a bearing. 8, the guide member 90 may be realized by a structure in which a plurality of rollers are rotatably installed on the frame 20. [ The guide member 90 serves to keep the workpiece 100 from being lifted upwards by the rotating abrasive member 70.

Hereinafter, the operation and effect of the buffing apparatus 10 including the above-described components will be described in detail by taking as an example the process of loading and unloading the workpiece 100 into the buffing apparatus 10 .

1 to 3, the drive motor 30 is operated. Whereby the conversion gear 40 rotates. As the conversion gear 40 rotates, the driving shaft 50 connected to the conversion gear 40 and the belt 53 rotates. The driving shaft 50 and the conveying roller 55 rotate integrally. The workpiece 100 on which the burr is formed is pressed between the conveying roller 55 and the support roller 58 by press working. Loading of the workpiece 100 can be performed manually by a person or automatically by an automatic loading device (not shown). The conveying roller 55 rotates while pressing the upper surface of the workpiece 100. Accordingly, the workpiece 100 advances in the rotating direction of the conveying roller 55. In this process, the support roller 58 plays a role of supporting the workpiece 100 to be loaded in contact with the conveyance roller 55 without falling downward. The workpiece 100 transported forward by the transporting roller 55 is removed by the rotating abrasive member 70 from a burr. The rotating abrasive member 70 is rotated by the abrasive gear 60 rotating at a high speed by the conversion gear 40 rotating integrally with the output shaft 32. The flexible blade 78 provided on the rotary abrasive member 70 polishes the burr formed on the lower surface of the work 100 several times and momentarily removes it. That is, the flexible blade 78 polishes the lower surface of the workpiece 100 that is continuously moved by the feed roller 55. In this process, the conveying roller 55 rotates at a lower speed than the rotating abrasive member 70. That is, even if the feed roller 55 rotates at a low speed, due to the gear ratio difference between the converting gear 40 and the abrasive gear 60, the rotating abrasive member 70 is rotated at a higher speed . Accordingly, the rigid blade 76 or the flexible blade 78 is instantaneously polished several times under the lower surface of the workpiece 100 being transported. The separation groove portion 79 provided at the free end of the flexible blade 78 increases the partial flexibility of the flexible blade 78 so that even if a part of the workpiece 100 to be polished has a three- There is an effect that the bur is polished while satisfactorily following the three-dimensional shape.

Thus, the buffing apparatus according to the present invention is configured to simultaneously operate the conveying roller and the polishing roller by one driving motor, thereby providing a simple structure and an effect of effectively polishing and removing the burr of the workpiece. Further, as in the preferred embodiment of the present invention, when the plurality of grooves are provided so that the flexible blades of the rotating abrasive member are separated from each other in the longitudinal direction thereof and can be independently polished, the burrs formed in a three- There is an advantage that it can be removed.

Further, when the guide member is provided as in the preferred embodiment of the present invention, it is possible to effectively prevent upward movement of the workpiece rotated by the rotating abrasive member.

While the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not to be limited by the examples, and various changes and modifications may be made without departing from the spirit and scope of the invention.

10: Bar polishing device of press-cut steel plate workpiece
20: frame
30: drive motor
32: Output shaft
40: conversion gear
50: drive shaft
52: Pulley
53: Belt
55: Feed roller
57: Friction structure
58: Support roller
60: abrasive gear
70: rotating abrasive member
72:
74: rotating body
76: Rigid blade
77: Flexible blade fixing hole
78: Flexible blade
79: separating groove
90: Guide member

Claims

frame;
A drive motor installed in the frame;
A conversion gear rotated by the driving motor;
A transfer roller installed on a drive shaft connected to the conversion gear and connected to the drive shaft to rotate integrally with the drive shaft;
A polishing gear rotating in engagement with the conversion gear and rotating faster than the rotation number of the conversion gear; And
And a rotating abrasive member provided coaxially with the rotating shaft of the abrasive gear to remove burrs of the workpiece conveyed by the conveying roller.

The method according to claim 1,
Wherein the transfer roller supports an upper surface of the workpiece,
Wherein the rotating abrasive member is configured to remove burrs formed on the lower surface of the workpiece.

The method according to claim 1,
Wherein a friction structure having an elastic restoring force is provided on a surface of the conveying roller.

The method according to claim 1,
Wherein the rotating abrasive member has a flexible blade pressed and fixed between a pair of rigid-body blades arranged in the rotational axis direction of the abrasive gear.

5. The method of claim 4,
Wherein the plurality of rigid blades are provided along the circumferential direction of the rotary polishing member,
Wherein the flexible blade is provided with a plurality of separating grooves so as to be separated from each other in a longitudinal direction of the rotating abrasive member.

The method according to claim 1,
And a guide member for pressing the workpiece to be polished by the rotating abrasive member so as to prevent the workpiece from being lifted upward.