JPH04502432A - Machine Tools - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Mouth making machine [ t Conventional technology The present invention relates to a work description according to claim 1.

According to the Federal Republic of Germany Utility Model Registration No. 8006414, in the U-shaped groove Planing machines are known in which the cutter is clamped by two profiled parts. this In planing machines, the formed part is designed to completely close the groove at the cutter shaft. Since there are no holes, chips will accumulate in the intermediate chamber. These chips are planing work It is usually removed again by hand as it interferes with the process.

However, at this time, there is a risk that the user may be injured by the sharp cutter of the planer. . Also, the screw for tightening the cutter is replaced many times when tightening. This is disadvantageous since it can only be operated with a fork wrench.

On the other hand, the machine tool according to the present invention having the features recited in claim 1 has the following advantages: The cutting edge is improved, chips do not get entangled in the cutter holder, and noise is reduced. It has the following advantages. Cutter tightening lids are suitable for applications that require high measurement accuracy. It is very simply constructed with only two molded parts. same thing as this also applies to grooves formed in the cutter holder.

This groove is easy to manufacture and the cutter holder has a rounded shape. There is no stress in the cutter holder. stomach.

Advantageous effects of the machine tool according to claim 1 are achieved by the measures described in claim 2 et seq. Variations and improvements are possible. In particular, the heads of the tightening and adjusting screws must not be operated. Because the cutter is easy to install, the cutter can be easily attached mechanically. Particularly advantageous. By providing a center of rotation between the molded parts, the An increase in the tightening force can be obtained based on two effects.

drawing Two embodiments of the invention are shown in the drawings and are explained in more detail below. . Figure 1 is a perspective view of a machine tool configured as a planer, and Figure 2 is the shape of the planer shaft. Figure 3 is a sectional view taken along the line ■-■ in Figure 2, Figure 4 is a perspective view of the cutter holder. FIG. 3 is also a cross-sectional view of a cutter holder according to a second embodiment;

Description of examples The electrically driven gun 1 has a mounting surface 2 for applying it to the workpiece, A planer shaft 3 equipped with a cutter 4 protrudes beyond the mounting surface 2 (see Figure 2). . The planer shaft 3 rotates in the direction of the arrow. This rotating shaft 3 has a cutter holder 5 and a radius of at least one shaped part configured as a support strip 6 located on the outside in the direction; , a radially outer shaped part configured as a clamping strip 7 and an inverted cup. The cutter 4 is configured as a cutter. These three parts 5.6.7 is constructed as a molded part manufactured by pultrusion, in which case the cutter The holder 5 is preferably made of aluminum and the shaped parts 6, 7 are made of steel. ing. The tightening strip 7 has three threaded holes 8 and two arranged in its end region. The cutter holder 5, which has two through holes 9, preferably has two holes extending in its axial direction. grooves 2, and these two grooves 12 are arranged on side walls 13, 14 facing each other. have. Therefore, the groove 12 becomes gradually narrower toward the outside (Fig. 3). reference). The side walls 13,14 are rounded 15 with a larger diameter for strength reasons. ．． At 16, it transitions to the base surface 17 of the groove 12. The side walls 13.14 have sharp edges. Protrusions with rounded surfaces at the ends of the grooves to avoid basting It has a section 18.

The L-shaped support strip 6 inserted into the groove 12 has two legs 20.21.

The leg 20 rests on the one hand against the side wall 13 and on the other hand against the cutter 4.

The raised strip 22 directed towards the cutter 4 engages with the leg 20 in the notch 23 of the cutter 4. do. At the corner edge between these two legs 20.21, the support strip 6 has a recess 24 and and has a raised portion 25 that is continuous with this recessed portion 24. There are two on leg 21. Threaded holes 26 are provided, and within these two threaded holes 26 a rotating circle is provided. A screw 27 with a tool mounting hole for adjusting the diameter is screwable.

Furthermore, the leg 21 is provided with three recesses 28 corresponding to the threaded holes 8. , these three recesses 28 serve to tighten the tensioning device 30 between the support strip 6 and the tensioning strip 7. It is not necessarily necessary for the tightening action.

A screw 31 with a tool mounting hole can be screwed into the threaded hole of the tightening strip 7. The tool mounting fitting hole 31 is supported within the recess 28, and the tool mounting fitting hole 31 is supported within the recess 28. The two molded parts 6.7 can be tightened together by means of a socket screw 31. tightening provisions The piece 7 is rectangular with a curved surface 32, closed except for the threaded 8°9. It has a body-like shape. The tensioning strip rests on one side against the side wall 14 of the groove 12. , is in contact with the cutter 4 on the other side. On the underside of the cutter 4 the clamping strip 7 is attached to the protrusion 3 3, the protrusion 33 engages in the recess 24 of the support strip 6.

According to the cutter tightening device of this machine tool, the rotation circle diameter of the cutter 4 is It can be adjusted using the screw 27 with a tool mounting hole regardless of the tightening state of the Wear. To tighten the cutter 4, the tool mounting screw 31 is inserted into the support strip 6. The clamping strip 7 is then screwed in towards the shaft located in the area of the projection 33. It can be rotated around a line. In this case, the clamping strip 7 is placed on the cutter 4 on the one hand. on the other hand, and on the protrusion 8, whereby the cutters 4 and 1 At the same time, the support strip 6 is also brought into contact with the side wall 13 of the groove 12, In this case, the material of the cutter holder has high elasticity as in the illustrated embodiment. If there is, it will bend. Therefore, there is no gap between the side wall 13 and the support strip 6. In order to avoid the formation of dips, the side wall 13 should have an angle greater than the slope of the outer surface of the leg 20. The side wall 13 and the leg 20 will be applied seamlessly to each other.

The second embodiment shown in FIG. 4 has a tightening and adjustment device different from that of the first embodiment. It has become. Therefore, 100 is added to the same and similar parts. Ru.

The support strip 106 has a longitudinally extending outwardly opening hole 135 in its leg 121. have. Inside this hole 135 is a hexagonal notch 137 for mounting a tool. There is a rod-shaped eccentric body 136 provided with. The eccentric body 136 is located in the recess 13 of the groove 12. 8 and serves to adjust the diameter of the rotation circle of the cutter 4.

Tightening strip 107 has a longitudinal hole 140 corresponding to hole 135 . This length Similarly, inside the hand hole 140 is a rod-shaped eccentric having a hexagonal notch 142 at the end. The body 141 has been inserted. The eccentric body 141 is located inside the recess 143 of the support strip 106. is supported by Instead of providing protrusions on the side wall 14, this embodiment uses a tension strip. A rounded projection 118 is arranged on the piece 107.

The operation of this second embodiment is the same as that of the first embodiment, but with tightening and adjustment. Rather than loading the tool into the screw head from the surface 32, The only difference is that it is attached to the data holder 105 from the side in the axial direction.

B international search report international search report DE 8900768 SA　32B07

Claims (1)

[Claims] 1. Hand-held machine tools, especially for woodworking, with a rotary drive cutter holder the cutter holder has at least one generally U-shaped semicircular It has a groove that narrows toward the outside in the radial direction. The cutters are radially adjustable and each have two molded parts that can be tightened together. one of the two molded parts in a type that is tightened by (7,107) is the cutter holder (5,105) in the groove (12) and the other molding the space between the parts (6, 106) with no gap radially outward. A machine tool characterized by being completely closed. 2. The radially outer molded part (7, 107) is connected to the tightening device (30), in particular on the one hand to the cutter (4) by means of a screw (31) or an eccentric (141); The device according to claim 1, which on the other hand is supported against the side wall (14) of the groove (12). machine tool. 3. The tightening device (30) is connected to the other molded part (6, 1) located radially inside. 2. The machine tool according to claim 1, wherein the machine tool is adapted to work at 06). 4. The molded part (7, 107) present on the outside touches the side wall (14) of the groove (12). On the abutting side, or the side wall (14) itself has a protrusion (18, 11) at the edge of the groove (12). 8), which allows the two molded parts to come into contact with each other only in this range. The machine tool according to any one of claims 1 to 3. 5. The molded part (6, 106) present on the inside is connected to the adjustment element, in particular the screw (27) or is caused by the eccentric body (136) in the radial direction with respect to the cutter holder (5, 105). 5. Machine tool according to claim 1, wherein the machine tool is adjustable. 6. The head of the screw (27, 31) or eccentric body (136, 141) is 6. The method according to claim 1, wherein the direction is adjustable by a tool, in particular a wrench or a box spanner. The machine tool described in any one of the following items. 7. The molded part (6, 106) present on the inside has a substantially L-shaped shape, One leg (20) of this molded part abuts the side wall (13) of the groove (12), and this leg Any one of claims 1 to 6, wherein the inside of (20) is in contact with the cutter (4). The machine tool described in item 1. 8. The molded parts (6, 106, 7, 107) are mutually aligned around the pivot point when tightening. 8. The machine tool according to claim 1, wherein the machine tool is capable of being swiveled. 9. The first molded part (6, 106) has a recess (24) at its corner edge. Then, the molded part (7, 107) located on the outside engages in the recessed part (24). The machine tool according to claim 8. 10. The cutter holder (5, 105) is made of aluminum, and the molded part ( 6,106, 7,107) is made of a material with a small elastic skin. The machine tool described in any one of items 9 to 9. 11. The leg (20) of the molded part (6, 106) existing on the inside and the leg that abuts this leg. according to claim 10, wherein the side walls (13) of the groove (12) form an angle (α). Machine Tools.