CN1671500A - Milling machines with magnetic power band conveyer for steel plate fabrication - Google Patents

Abstract

Disclosed is a milling machine for planar processing of a steel plate, which includes a drive source, a conveyor belt which travels by the force of the drive source, a magnetic body installed in contact with a lower surface of the conveyor belt for fixing the steel plate supplied upon the conveyor belt by a magnetic force, and a milling cutter installed above the conveyor belt to move up and down for milling the surface of the steel plate.

Description

Milling machine with magnetic conveyor belt for sheet steel processing

technical field

The present invention relates to a milling machine for planar processing of steel plates, and more particularly to a milling machine with a magnetic conveyor belt for milling a steel plate supplied to the conveyor belt while the latter is held magnetically.

Background technique

Currently, the surface of a steel plate having a specific thickness is generally milled using a milling machine for milling a steel plate as shown in FIG. 1 . The workpiece (that is, the steel plate 1) is clamped by a vise (vice) 3 installed on the movement station 2 of the milling machine, and then, while the steel plate is horizontally moved by the movement station 2, its surface is positioned above the movement station 2 Rotary milling cutter 4 for milling.

But in this case, each workpiece that is milled in turn must be manually clamped in the vise 3 for processing.

In order to overcome the above-mentioned drawbacks, a milling machine comprising an electromagnetizable mobile table 2 as shown in FIG. 2 is provided. The steel plate on the movable table 2 is fixed by magnetizing the movable table 2, and then the steel plate is processed by the milling cutter 4 positioned above the movable table 2 while being horizontally moved.

However, this machine needs to load the steel plate and then apply magnetic force to the moving table 2 every time it is processed.

Contents of the invention

The present invention is designed to overcome the above-mentioned drawbacks of the prior art. An object of the present invention is to provide an improved milling machine for steel plates, which can continuously supply the steel plate under the milling cutter through a conveyor belt, and fix the steel plate on the conveyor belt by magnetic force.

In order to achieve the above object, the present invention provides a milling machine including a driving source, a conveyor belt rotatable by the driving source, installed in contact with the lower surface of the upper part of the conveyor belt, for supplying to the A magnet to which the steel plate is fixed on the conveyor belt, and a milling cutter installed above the conveyor belt for cutting a plane of the steel plate, wherein the steel plate moves while being fixed on the conveyor belt by the magnet.

Preferably, the present invention further comprises a brush installed above the conveyor belt downstream of the milling cutter for cleaning the steel plate.

In addition, the present invention may include carrier roller units installed at the front and rear ends of the conveyor belt at the same height as the conveyor belt for supplying and drawing out the steel plates.

Preferably, the invention includes a cleaning roller mounted in contact with the surface of said conveyor belt for removing waste material from said conveyor belt.

Ideally, the magnet includes an electromagnet that can be selectively magnetized according to a power source, and the magnetic field of the magnet is set to a range of 5000˜8000G.

Brief description of the drawings

These and other features, aspects, and benefits of preferred embodiments of the present invention are set forth in the following detailed description with reference to the accompanying drawings, in which:

Figure 1 is a schematic diagram of an example of a milling machine according to the prior art;

Figure 2 is a schematic illustration of an example of another milling machine according to the prior art;

Figure 3 is a schematic diagram of a milling machine according to a preferred embodiment of the present invention;

Figure 4 is a partial cross-sectional view of the combination between the conveyor belt and the magnet in Figure 3;

BEST MODE FOR CARRYING OUT THE INVENTION

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

Fig. 3 shows the structure of a milling machine for steel plates according to a preferred embodiment of the present invention. With reference to Fig. 3, milling machine of the present invention comprises drive source 6 (such as motor), the conveyor belt 7 that can be rotated by the driving force of drive source 6, the milling cutter 5 that is installed on conveyor belt 7 top, and is used for fixing workpiece by magnetic force on Magnets on conveyor belt 7.

Both ends of the conveyor belt 7 are respectively connected to a drive roller 7a and a driven roller 7b in a conventional manner, and when the drive roller 7a is rotated by the driving source 6, the conveyor belt 7 moves around the rollers 7a and 7b in its longitudinal direction. Here, the driving source 6 , the driving roller 7 a and the driven roller 7 b are mounted on the body frame 13 .

Preferably, the track idler unit 11 is installed at the front end and the rear end of the conveyor belt 7, and has the same height as the conveyor belt 7 to facilitate supply and unloading of steel plates.

The milling cutter 5 is mounted above the conveyor belt 7 and is moved up and down by a known lifting device 5a. Preferably, the milling cutter 5 has a plurality of blades, and processes an upper surface of a workpiece (ie, a steel plate) by a rotational force received from a drive motor 5b. In addition, the lifting device 5a may include a sensor (not shown) for sensing the vertical position of the milling cutter 5, and a driving unit (not shown), the driving unit for sliding the milling cutter vertically so as to operate according to the user's operation. To control the cutting thickness of the steel plate.

When the milling cutter 5 mills the steel plate, burrs frequently appear on the edge of the steel plate, and debris generated during processing may cause scratches on the surface of the steel plate.

Therefore, in order to avoid the above-mentioned disadvantages, it is desirable to install a brush 9 driven by a drive motor 9 a for cleaning the steel plate downstream of the milling cutter 5 relative to the advancing direction of the conveyor belt 7 .

As shown in FIG. 4 , the magnet 8 is fixed to a body frame 13 whose upper surface is in contact with the lower surface of the conveyor belt 7 and pulls the steel plate 1 supplied to the conveyor belt 7 by magnetic force. At this time, it is desirable to make the contact surface of the conveyor belt and the magnet smooth so that the conveyor belt 7 can move smoothly on the magnet 8 when it rotates.

The magnet 8 can be configured with an electromagnet which can be selectively magnetized depending on the power supply. In this way, the magnetic field of the magnet 8 can be appropriately set according to the thickness or width of the steel plate. Considering that the rotation speed of the milling cutter 5 is usually set at about 500 rpm (revolutions per minute), the magnetic field of the magnet for a steel plate having a thickness of 6 to 35 mm is preferably set in the range of 5000 to 8000G. Here, if the magnetic field is too weak and lower than 5000G, the steel plate may come off from the conveyor belt 7 when the milling cutter 8 comes into contact. If the magnetic field is too strong and exceeds 8000G, it may cause the release of the steel plate or the rotation of the conveyor belt 7 to be interrupted. The present inventors introduced an appropriate magnetic field for stably milling the steel plate according to the size of the steel plate, as shown in Table 1, by conducting experiments.

Table 1

Preferably, the milling machine of the present invention can be configured with a control module 10 so as to be able to control the vertical position of the milling cutter 5 or the magnetic field of the magnet 8 according to the size of the workpiece (ie, the steel plate).

In the present invention, the conveyor belt 7 can be made of various materials. If the conveyor belt 7 is made of a magnetizable material, the metal workpieces machined during cutting are bonded to the surface of the conveyor belt and move together.

Therefore, a dedusting roller 12 may be additionally installed in contact with the edge surface of the conveyor belt, which is mounted on one side of the body frame 13 to remove waste materials such as metal pieces stuck to the conveyor belt 7 while cooperating with the rotation of the conveyor belt 7. Preferably, the dedusting roller 12 is mounted in contact with the edge of the conveyor belt where the steel sheets are supplied, so that the surface of the conveyor belt 7 is cleaned just before the steel sheets are supplied.

The operation of the milling machine for flat machining of steel plates according to the present invention comprising the assembly as described above will be described below.

First, a workpiece (ie, a steel plate) is loaded onto the front track roller unit 11 in contact with the conveyor belt 7, and then the steel plate is moved below the milling cutter 5 by the rotation of the conveyor belt.

At this time, the steel plate is fixed on the conveyor belt 7 by the magnetic force from the magnet 8 installed in contact with the lower surface of the conveyor belt 7 .

On the other hand, the vertical position of the milling cutter 5 is determined by the lifting device 5a according to the cutting thickness of the steel plate set by the user. The milling cutter 5 is rotated by receiving a rotational force from the drive motor 5 b, and then mills the surface of the steel plate conveyed on the conveyor belt 7 .

After passing the milling cutter 5, the steel plate moves continuously to reach under the brush 9, and then the surface of the steel plate is cleaned by the brush 9. Afterwards, the steel plate is drawn out towards the track idler unit 11 located at the rear end of the conveyor belt 7 .

Industrial Applicability

The milling machine according to the invention has the beneficial effect of increasing its milling speed by a factor of about 5 compared to a milling machine of the conventional vise type as shown in FIG. Steel plates are conveyed continuously.

In addition, since the magnet is installed in contact with the lower surface of the conveyor belt, the present invention can prevent the steel plate from tilting vertically, thereby preventing tolerances in the thickness processing of the steel plate.

The present invention has been described in detail. However, it should be understood that these detailed descriptions and specific examples and preferred embodiments of the present invention are given by way of illustration only, and for those skilled in the art, without departing from the spirit and scope of the present invention, Various improvements and changes are apparent.

Claims (6)

1. A milling machine for milling the surface of a steel plate, comprising: drive source; a conveyor belt moved by the force of said driving source; a magnet installed in contact with a lower surface of the conveyor belt for magnetically fixing the steel plate supplied to the conveyor belt; and A milling cutter installed above the conveyor belt and movable up and down, the milling cutter mills the surface of the steel plate. 2. The milling machine of claim 1, further comprising: A brush installed above the conveyor belt and downstream of the milling cutter is used for cleaning the steel plate. 3. The milling machine of claim 1, further comprising: Track idler units installed at the front end and rear end of the conveyor belt, the crawler idler units have the same height as the conveyor belt, and are used for supplying and unloading the steel plates. 4. The milling machine of claim 1, further comprising: A dedusting roller mounted in contact with the surface of the conveyor belt for removing waste on the conveyor belt. 5. The milling machine of claim 1, wherein the magnet comprises an electromagnet that is selectively magnetizable in response to a power source. 6. The milling machine according to any one of claims 1 to 5, characterized in that the magnetic field of the magnet is set in the range of 5000-8000G for a steel plate with a thickness of 6-35mm.

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