CS197862B1 - Deburring device - Google Patents

Abstract

The invention relates to a deburring device intended for deburring the end cuts of billets and bars of circular or hexagonal cross-section. The introduction of modern sensitive electronic flaw detectors in secondary metallurgy requires the removal of burrs and, in addition, a certain chamfering of edges or bars around the entire circumference. Chamfering the edge not only enables trouble-free running-in of fine defectoscopes, but also significantly improves the running-in of billets or bars into straighteners, reduces the intensity of metal deposition on straightening rollers, and thus significantly increases their service life. When cutting with a hot saw, burrs of great hardness remain on the circumference of the cut, especially when the billets or bars are made of alloyed steels. The removal of such burrs and chamfering of the cut edge can only be performed by grinding. The grinding of the edges of the front cuts has so far been carried out manually or by means of a device manufactured according to the GDR patent number 54 224. The essence of this device lies in the fact that the rotating rod is ground by the face of the grinding wheel, inclined at an angle of 45° to the longitudinal axis of the rod. The main disadvantage of this device is that it can only be used with straight rods of smaller diameter. In addition, the complexity of the rotating clamping device and the small possibility of using the mass of the grinding wheel are also disadvantageous.

Description

197,862 (11) (Bl)

DESCRIPTION OF THE INVENTION

REPUBLIC

(19) CERTIFICATE OF CERTIFICATE

(61) (23) Show priority (22) Enrolled 10 05 78 (21) PV 2965-78 (51) IntCI3 B 24 B 9/04

OFFICE OFFICE

AND DISCOVERY (40) Published 31 OQ 79 (45) Issued Q1 7 g2

Author of the invention KUČERA Ja'n, LA3CH HARRY ing., NOVA 'DUBNEJA and MINARECH JÁN ing. TRENČÍN (54) Deburring equipment

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deburring device for deburring billets and bars of circular or hexagonal cross section. t

The introduction of modern, sensitive electronic defectoecopes in a dense secondary production requires the removal of fins and, in addition, some chamfering of edges or rods over the entire circumference. Edge chamfering allows for a non-trouble-free run-in of defect-defective fine barriers, but also the build-up of billets or bars into the straighteners will be substantial, reducing the intensity of metal uptake on the straightening rollers and thus significantly increasing their lifetime. When cutting the heat pile, large hardness remains in the cut circumference, especially when it comes to billets or bars made of alloy steel. Removing such burrs and chamfering the cutting edge can only be done by grinding. The abrasion of the end cut edges was carried out manually or by means of a device according to the NDR patent number 54 224. The principle of this device is that the rotating rod is abraded by a grinding wheel 3 inclined at an angle of 45 ° to the longitudinal rod. The disadvantage of this device is mainly that aa can only be used with straight bars of smaller diameter. Furthermore, the complexity of the rotating clamping device and the small possibility of using the grinding wheel mass are also disadvantageous. 197,862 2,197,882

The above-mentioned drawbacks are eliminated by a deburring device made of a rigid milling machine, which is supported by a support and a centering device according to the invention, wherein the first drive unit is mounted on the support frame and the second drive unit is connected via a spindle-rotating gearbox. embedded in a frame which is connected to a piston rod of a rectilinear hydraulic motor mounted on the frame, with a swing arm mounted on the spindle, at the end of which a grinding wheel is mounted, connected by means of gearwheels and through the shaft to the first drive unit. The advantage of the deburring device according to the invention is that it allows to abrade relatively large curved bars and billets of large weight and diameters. Due to the fact that the workpiece is standing in the abrasion, a substantially simpler structure can be used to center and clamp the workpiece. The abrasion itself is carried out by the circumference of the grinding wheel, which allows better use of the grinding wheel mass. Last but not least, the construction of the device makes it possible to separate the drive units from the dusty environment of their own grinding, which is carried out in a closed space to which effective suction can be connected.

In the accompanying drawing, an exemplary arrangement of a deburring device according to the invention is shown schematically.

The deburring device is formed from a rigid frame 1, on which a slide-out part of the device - a support 2 - is mounted in the rolling guide. The support 2 consists of a frame 21 on which the spindle 23 of the electric motor 22 and the hydraulic motor 28 are mounted. On the spindle 23, the X-arm is swiveled with the sanding disc χ and with the screw 6. The sanding disc drive χ is secured by the electromotor 22 through the shaft 26, rotatably mounted in the spindle axis 2¾, and by a set of bevel gears 31 of elold toothing stored in the χ arm. In addition to the basic rotational motion, the grinding wheel χ still performs an annular motion around the axis which is identical to the workpiece axis 10. This movement is derived from the hydraulic motor 24 which drives the spindle 23 connected to the arm χ via a gearbox 28. The straight-line hydromotor makes the slide movement of the carriage 2. The carriage is divided into a rapid traverse through which the grinding wheel χ approaches the workpiece 10 in the initial phase and the micro-traverse, which occurs at a small distance of the grinding wheel ahead of the workpiece head Xg. The abrasive disc wear χ is eliminated by the displacement of the hydraulically controlled stopper g, by means of which the chamfer size of the edges on the face of the workpiece χο can be varied over a certain diameter of the grinding wheel. The one-off stop of the arm χ of the diameter of the workpiece allows the bolt 6. The housing 2 is firmly connected to the support 2, which encloses the grinding area and to which is attached a suction of 2X fine abrasive waste. The coarse abrasive particles are deposited in the lower part of the housing 2 while being discharged into the waste containers. The wardrobe 2 also includes the second safety grinding wheel χ.

Workpiece Xg is folded from the intermediate conveyor parallel to the longitudinal axis of the centering device 6 of the opening jaw of the centering vise. Another Xg workpiece is folded to the intermediate conveyor and arrives at a fixed stop to wait. Stop

Claims (4)

What is claimed is: 1. A deburring device formed of a rigid milling machine on which a port and a centering device are mounted, characterized in that a first drive unit (22) and a second drive unit are mounted on the frame (21) of the support (2). (24) connected via a gear (25) with a spindle (23) rotatably mounted in a frame (21) which is rigidly connected to the plastic of the linear hydraulic motor (9) mounted on the frame (1), with the spindle (23) A pivoted arm (3) at the end of which is a rotatably mounted grinding wheel (5) coupled to the bevel gear assembly (31) and through the shaft (26) to the first drive unit (22). 2. Deburring device according to claim 1, characterized in that the arm (3) is adjustable by means of a screw (6) with a spindle (23). Deburring device according to claim 1 or 2, characterized in that, opposite the piston of the rectilinear hydraulic motor (9), a fusible stop (8) is mounted on the frame (1). No. 3,197,862 guarantees that the length of the workpieces 10 is that their face, which in the next phase comes to abrading, is always in the flat plane. On the one hand, the QDPoDm 101 axis is provided with a single-action, adjustable prismatic segment 11a, on the one hand, by the centering vise 42, on the one hand, by the adjusting screw 42. The synchronized movement of the centering vise 42 is provided by two 3-toothed gearwheels. After the workpiece 10 has been clamped in the centering device, the support 2 starts to be driven together with the arm 2 by the abrasive wheel 2 by means of a straight-line hydraulic motor 2 to the workpiece 10. At the same time, the motor 26 starts to rotate the spindle 23 from the gearbox 22 and together with it. The arm 2 and the grinding wheel 2 are also used to move the grinding wheel 2 ' supplied by the electric motor 22 to the shaft 26 and the bevel wheels 21 '. Just before the grinding wheel 2s touch the workpiece face 10, the rapid traverse of the slide 2 is changed to a microslip - feed rate. The first contact of the abrasive disc 28 of the end edge of the workpiece 10 deburrs, which is accompanied by a combination of three working movements, namely the movement, the rotational movement and the self-torsion of the grinding wheel 2. The loose workpiece 10 is transversely folded onto the second intermediate conveyor, whereby the second face is pressed against the stopper and folded onto the centering device of the next deburring machine, whereby the second face is deburred. COMBINED OUT 4. Deburring device according to claim 1, characterized in that the arm (3) with the grinding wheel (5) is enclosed in the housing (7) connected to the suction (71) and firmly connected to the support (2). 1 drawing