GB2185201A

GB2185201A - A motor-driven apparatus for deburring perforated or stamped plates

Info

Publication number: GB2185201A
Application number: GB08624475A
Authority: GB
Inventors: Joachim Dickmann; Rainer Schmidt
Original assignee: Schmidt Rsa Entgrat Tech
Current assignee: Schmidt Rsa Entgrat Tech
Priority date: 1985-11-08
Filing date: 1986-10-13
Publication date: 1987-07-15
Also published as: CH670980A5; GB2185201B; DE3539666C1; FR2589768A1; GB8624475D0

Abstract

In a motor-driven apparatus for deburring perforated or stamped plates, a rotary cup-shaped brush 4 is mounted on a drive shaft 3 in an apparatus housing 1 having lateral handles 11 and protrudes from the housing. An annular or frame-like structural grinding disc or wheel 5 is disposed around the cup-shaped brush and is driven in an oscillating manner, said grinding wheel being displaceable in a direction towards the apparatus housing 1 in an axial manner relative to the cup-shaped brush 4 in opposition to a restoring spring pressure and protruding with its outer end face 51 beyond the end face 41 of the cup-shaped brush 4 in its working position. With such an apparatus, it is possible to deburr perforated or stamped plates by initially removing the burr in a chip-detaching manner in the region to be deburred via the intermediary of the grinding wheel and, in the event of more intensive pressure in the axial direction, by utilising the cup-shaped brush in a manner known per se in order to effect thereby the desired rounding- off and internal deburring of the edge region of a bore or stamped-through portion. <IMAGE>

Description

SPECIFICATION A motor-driven apparatus for deburring perforated or stamped plates The present invention relates to a motordriven apparatus for deburring perforated or stamped plates or the like, including a rotary cup-shaped brush which protrudes from the housing of the apparatus when mounted on the drive shaft.

Both manually operated and fixed motordriven apparatuses are known for deburring plates, more especially in the edge region thereof, and such apparatuses utilize a rotary brush. An apparatus of such type is known, for example, from German Patent Specification No. 3 136 278 in which a circular brush is provided. However, deburring apparatuses are also known which have a cup-shaped or crown brushes.

However, it is only inadequately possible with these apparatuses to remove sufficiently the burrs formed by bores or stampings on plates. In consequence, the deburring work is generally carried out by hand with suitable, manually operated apparatuses.

The present invention seeks to provide a motor-driven apparatus for deburring perforated or stamped plates which permits satisfactory removal of burrs in the region of the bores or stamped-through portions.

To achieve this object of the invention, an apparatus of the above-mentioned type is proposed which is characterised in that an annular or loop-shaped grinding member is disposed around the cup-shaped brush and is driven in an oscillating manner, said grinding member being displaceable in a direction towards the apparatus housing in an axial manner relative to the cup-shaped brush in opposition to a restoring spring pressure and protruding with its outer end face beyond the end face of the brush in its working position.

The basic concept of the invention is initially to remove the burr by means of b chip-detaching operation, that is to say by means of the grinding member, and then to round-off the sharp edges of the bores or stampedthrough portions by utilisation of the cupshaped brush, without the need for a plurality of apparatuses therefor.

According to a preferred embodiment of the invention, the apparatus is further characterised in that a cylindrical guide-means housing is rotatably mounted on an eccentric of the drive shaft and is driven so as to oscillate at right angles to the axis, a cylindrical carrier member for receiving the grinding member being axially displaceable in a limited manner in said housing and being coupled with the guide means housing in the direction of oscillation.

Such an apparatus permits the cup-shaped brush to be rotatably driven in a known manner, whilst the same drive causes the grinding member to effect an oscillating movement.

When such an apparatus is utilised to deburr perforated or stamped plates, the grinding member which protrudes beyond the cupshaped brush in the working position is initially brought onto the region to be deburred for oscillating purposes, thereby removing the burr in chip-detaching manner. In the event of a more intensive pressure acting in an axial direction towards the working surface, the guide means housing is pushed back relative to the cup-shaped brush by the grinding member, preferably a grinding disc or wheel, in opposition to the pressure of the restoring springs, or like means so that the end face of the grinding member is utilised and subsequently effects the desired rounding-off and internal deburring of the edge region of the bore or stamped-through portion.

Such an apparatus according to the invention may either be disposed on a suitable machine frame in a stationary manner or be provided, also in accordance with the invention, for manual operation with suitable handles on the apparatus housing.

The invention will be explained in more detail hereinafter and, by way of example, with reference to a motor driven hand-held apparatus and with reference to the accompanying drawings in which: Figure 1 is an underneath view taken from the working end of apparatus for deburring plates; and Figure 2 is a partial, longitudinal sectional view through the apparatus of Fig. 1.

A drive motor in a housing 2 is flangemounted on a housing 1 of the apparatus which is manually operated by handles 11 and is to be used to deburr perforated or stamped plates. A drive shaft 3 protrudes at the side of the housing 1, opposite to motor housing 2, and an annular or cup-shaped brush 4 is replaceably mounted on the end face of the drive shaft 3.

A cylindrical guide-means housing is generally denoted by the reference numeral 8 and is rotatably mounted on an eccentric 31 of the drive shaft 3 by a hollow shaft connectionportion 85. This guide-means housing 8 performs an oscillating movement as a result of its mounting on the shaft 3 and the rotation of this shaft. Housing 8, is connected to the housing 1 via the intermediary of rubber buffer 84.

A cylindrical or cup-shaped carrier member 52 is displaceably mounted on the hollow shaft connection-portion 85 of the guide means housing 8 so as to be displaceable in a limited manner in an axial direction. Carrier member 52 accommodates an annular or frame-like structured grinding wheel 5 in a receiver portion or member 57 and the grinding wheel 5 projects outwardly of the end face of receiver member 57 and protrudes with its end face 51 beyond the end face 41 of the cup-shaped brush 4 in the rest position and in the working position of the grinding wheel 5.

The wheel 5 is pressed, with its carrier member 52, into its (working) position by one or more compression springs 6 which are supported between carrier member 52 and guidemeans housing 8. Pins or bolts 7 are retained in an axis parallel manner in bores 83 in a plate 82 of the guide-means housing 8 by a nut-type securing means 71, and the compression springs 6 are mounted on the bolts 7. Each of the bolts 7 protrudes into a particular guide means 53 on the carrier member 52 for receiving the grinding member and, in consequence, the bolts 7 couple the guide means housing 8 and the carrier member 52 in a direction transverse to the transverse axes of the housing and carrier member. In such a case, the bolts extend through an aperture 56 in the plate 54 of the cup-shaped carrier member 52.

As can be seen more especially from Fig. 1, the diametrical or transverse axis 42 of the cup shaped brush 4 and the diametrical or transverse axis 55 of the grinding wheel 5 are spaced apart from each other as a result of the eccentrics 31 of the shaft 3.

For the operational use of the apparatus, the grinding wheel 5 is initially placed at the region to be deburred, thereby causing the burr, which protrudes beyond the plate surface, to be removed in a chip-detaching manner. Due to more intensive pressure acting on the apparatus in the working direction, the cupshaped carrier member 52 is pushed with its grinding wheel 5 into the guide-means housing 8, that is to say into the region of the annular shoulder 81, in opposition to the pressure of the restoring springs 6. After a prescribed displacement distance has been covered, the rotary cup-shaped brush 4 comes into use and the end face 41 of said brush, in this position, is situated substantially flush with the plane of the end face 51 of the wheel 5 which moves back in a resilient manner.In such a case, the cup-shaped brush rounds-off the kedge region of the stamped-through portion, or respectively the bore to be processed and simultaneously removes any remaining burr portions which may possibly protrude into the inside of the bore.

After the operational treatment and with decreasing pressure in the working direction, the spring 6 returns the apparatus carrier member 52 again into the rest position or the working position of the grinding wheel 5. This position is secured by the stop ring 9 which is provided on the hollow shaft connection-piece 85.

It is basically possible to provide various drives for the grinding member and the cupshaped brush. It is also possible to adapt such an apparatus according to the invention in such a manner that a grinding member rotates about the cup-shaped brush. Basically the same effect may be achieved by the use of different structural means for the axially displaceable arrangement and re-setting of the grinding member relative to the cup-shaped brush.

Claims

1. A power-driven apparatus for deburring perforated or stamped plates or the like, comprising a rotary cup-shaped brush which protrudes from the housing of the apparatus when mounted on the drive shaft, wherein an annular or loop-shaped grinding member is disposed around the cup-shaped brush and is driven in an oscillating manner, said grinding member being displaceable in a direction towards the apparatus housing in an axial manner relative to the cup-shaped brush in opposition to a restoring spring or other return pressure and protruding with its outer end face beyond the end face of the brush in its working position.

2. An apparatus as claimed in claim 1, wherein a cylindrical guide-means housing is rotatably mounted on an eccentric of the drive shaft and is driven so as to oscillate at right angles to the axis, a cylindrical carrier member for receiving the grinding member being axially displaceable in a limited manner in housing and being coupled with the guide means housing in the direction of oscillation.

3. An apparatus as claimed in claim 2, wherein one or a plurality of guide means are coaxially provided in the cup-shaped carrier member for receiving the grinding member, and bolts or like threaded pins which are retained on the guide means housing, engage in said guide means; a plurality of springs being disposed between the guide-means housing and the carrier member for receiving the grinding member and acting in an axial direction.

4. An apparatus as claimed in claim 2, wherein the cup-shaped carrier member for receiving the grinding member is displaceably mounted on a hollow shaft connection-piece of the guide means housing in a limited manner.

5. An apparatus as claimed in claim 2, wherein the guide-means housing is supported on the apparatus housing by means of one or a plurality of rubber buffers.

6. An apparatus as claimed in one or more of the preceding claims, wherein two handles are provided on the apparatus housing perpendicular to the drive shaft for manual operation.

7. An apparatus as claimed in claim 1, wherein a grinding wheel is provided as the grinding member.

8. An apparatus for deburring perforated or stamped plates substantially as herein described with reference to and as illustrated in the accompanying drawings.