DE10343631B3 - Deflashing tool for plastic and rubber moldings has wires with one fixed end, the other end being attached to weight mounted in tool so that it moves outwards as tool rotates and keeps wire taut - Google Patents

Abstract

Deflashing tool for plastic and rubber moldings has wires (7) or polymer or natural fibers, one end (8) of which is fixed. Their other ends (6) are attached to weights (5) mounted in the tool so that they move outwards as the tool rotates and keep the wires taut.

Description

The The invention relates to a tool for deburring plastic and Rubber moldings.

The prior art ( DE 44 45 592 A1 ) includes a tool for deburring plastic and rubber molded parts, which has as a deburring elements approximately coaxial with a tool shank arranged portions of a metal wire rope loosely attached to the tool shank holder, that is not stretched, so that the rope remains movable in the cable direction and the cable sections bulge outwardly during rotational driving of the tool shaft due to the centrifugal force, wherein Ausgleichsbewegun conditions of the rope in the cable direction on holders and rope sections are made possible.

This belonging to the prior art tool has the disadvantage that the bulging of the metal wire ropes is not is defined, in particular not if one or more metal wire ropes after a break, as it often happens when editing burrs, exchanged become. In this case, for example, entered in CNC machines vote Paths no longer match. In particular, the exchanged ropes are too big, will too much material taken off with consistent paths. bulge If the metal wire ropes are not enough, the burrs will not away.

The The technical problem underlying the invention is that to provide a tool for deburring plastic and rubber molded parts, which does not have the disadvantages mentioned.

This technical problem is solved by a tool for deburring plastic and rubber moldings with the features of claim 1 solved.

Thereby, that the tool according to the invention has at least one rope, which with one or both ends movably disposed in or on the tool, and in that the movably mounted end is connected to a weight, and that the weight is stored in the tool such that the weight as the rope during rotation of the tool due to centrifugal force exciting weight is formed, it comes in the assembly and even when replacing individual ropes not on the exact length of the ropes at. The weights are movable and stored with play in the tool.

hereby must be the length the rope only be designed so that the weight with play in the given leadership is arranged. When the tool is rotated, the weights become pressed outwards due to the centrifugal force in the given guide and thereby tension the rope. The strained ropes always have it the same length.

The at least one rope or the rope sections can be made of metal, plastic or other materials. The selection of the material is aimed depending on the material of the workpieces to be deburred. When Advantageously, a metal wire rope, preferably of several Strands exposed. It can but also plastic ropes or ropes, as in a gut tissue of tennis rackets used to be placed on the tool.

The following versions refer only to metal wire ropes, the embodiments but also for Ropes made of other materials apply equally.

According to one preferred embodiment one end of the metal wire rope fixed and the other movable and / or arranged on the tool.

The firmly arranged end of the wire rope is advantageous to the shaft attached to the tool.

Advantageous the metal wire rope is deflected at least once on the tool arranged. As a result, the clamping effect by the weights during the Improved centrifugal force.

Advantageous is between the at least one metal wire rope and a steering wire and axis of rotation of the tool included an angle of less than 90 °. The metal wire rope advantageously occurs on a head side of the steering and rotation axis of the Tool and the weights, that is, so that the movably mounted Ends of the at least one metal wire rope are in a plate arranged the tool. Lie the head side of the longitudinal and Rotation axis and the plate is not at a height, so will an angle of less than 90 ° formed. If both parts are at a height, would be a Angle of 90 ° available. With the tool, where between the rotation axis and the metal wire ropes an angle of 90 ° is formed is, can however, only special workpieces are processed. The preferred embodiment is the one at which an angle between the metal wire ropes and the Rotation axis is included. The angle can be determined by the distance the head side of the longitudinal axis of the workpiece and the arrangement of the plate on the longitudinal axis can be adjusted.

According to a further embodiment, no plate is provided, but the fixed end of at least one metal wire rope is attached to the shank of the tool. The metal wire rope is inserted through the head side of the longitudinal axis in the tool. In the tool guides for the weights are provided, which tension the at least one metal wire rope during rotation due to the centrifugal force.

The inventive device has the advantage that it is very easy to install. Furthermore The metal wire ropes can be very easily and with great accuracy switch.

Furthermore points the tool at relatively low revolutions, for example 2,000 or 3,000 rpm a certain softness, which is desired when deburring different workpieces.

on the other hand the tool can be exposed to very high rotational speeds, For example, up to 50,000 revolutions, this should be a workpiece requirement make necessary.

According to one particularly preferred embodiment is used as a metal wire rope erosion wire, which is usually for erosion processes is used.

Further Features and advantages of the invention will become apparent from the accompanying drawings, in the two embodiments a tool according to the invention are shown only by way of example. In the drawing show:

1 a first embodiment in longitudinal section;

2 the tool according to 1 in perspective view;

3 a modified embodiment, partially cut.

1 and 2 show a tool ( 1 ) with a receiving shaft ( 2 ), a plate ( 3 ) wearing. In the plate ( 3 ) are guides ( 4 ) for weights ( 5 ) intended. In the weights ( 5 ) are ends ( 6 ) of metal wire ropes ( 7 ) attached. The other ends ( 8th ) of the metal wire ropes ( 7 ) are on one side of the head ( 9 ) of the longitudinal axis ( 2 ) attached. For this attachment is a conically tapered clamping sleeve ( 10 ) provided the ends ( 8th ) of the wires ( 7 ) in the shaft ( 2 ) is stuck. The clamping sleeve ( 10 ) by means of a screw ( 11 ) inside the longitudinal axis ( 2 ) tense and fixed. For this purpose, the clamping sleeve ( 10 ) an internal thread ( 27 ) and is supported by a projection.

The clamping sleeve ( 12 ) has on its outer tapered lateral surface grooves (not shown), in which the metal wire cables ( 7 ) can be inserted. The diameter of the grooves is smaller than the diameter of the metal wire ropes to achieve a clamping action.

During assembly, the metal wire ropes ( 7 ) shortened to a length such that the weights ( 5 ) with game in the guides ( 4 ) are arranged. It is particularly important to ensure that the metal wire ropes ( 7 ) have a length such that the weights ( 5 ) in the guides to the outside of the receiving shaft ( 2 ) can move away. Upon rotation of the tool ( 1 ) the weights ( 5 ) are pushed away from the longitudinal axis due to the centrifugal force and thus tension the metal wire ropes ( 7 ) evenly.

The metal wire ropes are around guides ( 12 . 13 ) redirected. As a result, the clamping effect is increased.

About the distance (A) between the plate ( 3 ) and the head ( 9 ) of the longitudinal axis is the angle (α) between the metal wire ropes ( 7 ) and the rotation axis (B) adjustable.

The dish ( 3 ) is formed in two parts. During assembly or replacement of metal wire ropes ( 7 ) screws ( 14 ), such that the weights ( 5 ) in the guides ( 4 ) are freely accessible.

3 shows a tool ( 15 ) with a longitudinal axis with a shaft ( 16 ). The metal wire rope ( 18 ) is in a clamping groove ( 25 ) and enters exit openings ( 17 ) from the shaft ( 16 ) out. The rope ( 18 ) is on the head side ( 19 ) in a head bore ( 26 ) of the tool is reinserted into the tool. In the tool ( 15 ) is a hole ( 20 ), in the weights ( 21 ) are stored with game. In the weights ( 21 ) are ends ( 22 ) of the metal wire rope ( 18 ) stored. The tool ( 15 ) shows one with screws ( 24 ) attached lids ( 23 ) on.

Will the tool ( 15 ) are rotated about the axis of rotation (B), the weights ( 21 ) in the hole ( 20 ) pressed outwards and thereby tension the metal wire rope ( 18 ).

1

Tool

2

shank

3

Plate

4

guides

5

weights

6

end up the metal wire ropes

7

metal wire ropes

8th

end up the metal wire ropes

9

head of the tool

10

clamping sleeve

11

screw

12 13

turning points

14

screw

15

Tool

16

shaft

17

outlet openings

18

metal wire

19

head

20

drilling

21

weights

22

Ends of the metal wire rope ( 18 )

23

cover

24

screw

25

clamping groove

26

head bore

27

inner thread

α

angle

Claims (8)

Tool ( 1 ) for deburring plastic and rubber molded parts, with at least one cable ( 7 . 18 ), which with one or both ends ( 6 . 22 ) movable in or on the tool ( 1 ), wherein the movably mounted end ( 6 . 22 ) with a weight ( 5 . 21 ) and in which the weight ( 5 . 21 ) in the tool ( 1 ) that the weight ( 5 . 21 ) as a the rope ( 7 . 18 ) upon rotation of the tool ( 1 ) due to the centrifugal force exciting weight ( 5 . 21 ) is trained. Tool according to claim 1, characterized in that one end ( 6 ) of the at least one cable ( 7 ) movable and the other end ( 8th ) is fixedly arranged in or on the tool. Tool according to claim 1, characterized in that the at least one cable ( 7 . 18 ) is arranged deflected at least once. Tool according to claim 1, characterized in that between the at least one cable ( 7 ) and a longitudinal and rotational axis ( 2 ) of the tool ( 1 ) an angle α of less than 90 ° is included. Tool according to claim 1, characterized in that the one end ( 8th ) of the at least one cable ( 7 . 18 ) as one from a head side ( 9 . 19 ) of the longitudinal and rotational axis ( 2 ) of the tool ( 1 ) leaving end ( 8th ) is trained. Tool according to claim 5, characterized in that the movably mounted ends ( 6 ) of the at least one cable ( 7 ) in a plate ( 3 ) of the tool ( 1 ) are arranged. Tool according to claim 6, characterized in that the plate ( 3 ) is rotationally symmetrical. Tool according to one of the preceding claims, characterized in that the rope ( 7 ) is formed of metal, plastic and / or a biological material.