JPH06328405A - Cutter head - Google Patents

Abstract

PURPOSE: To constitute a pressing part into a cylindrical shape to form a flat clamping face on the surface, to form the pressing part by seven pressing wedges and to provide a stopper on the end wall to adjust position of the stopper and to clamp and fix it on the facing face for clamping by the wedge face. CONSTITUTION: A cutter 3 is fixed in a storing channel 2 by means of a clamping unit. The clamping unit is constituted of a pressing part 10 and a clamping part 11 and the pressing part 10 is constituted of seven pressing wedges 29-35 and they are arranged in series. The pressing part 10 is brought into contact with a stopper 27 formed of a screw by means of a pressing wedge 29. The intermediate pressing wedges 30-34 are made the same and are arranged every other one and the large base faces 36 and 38 are brought into contact with the bottom 22 of the channel and for the pressing wedges 31 and 33, the small base faces 39 and 40 are brought into contact with the bottom 22 of the channel. The position of the pressing part is adjusted by moving the wedge 29 by the screw of the stopper 27. Therefore, when the screw is clamped, the wedges 30-34 are pressed toward the clamping part 11 by wedge action and other wedges 31 and 35 are pressed on the bottom part 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a cutter carrier, and the cutter carrier has an accommodating groove for accommodating the cutter along its outer periphery, and the cutter has a pressing portion in the accommodating groove. A cutter head, particularly a cutting cutter and notch for wood or plastics processing machines, which are held by means of which the pressing parts can be pressed against one another by at least one adjusting part so that the pressing parts exert a clamping force in the direction of the cutter. The present invention relates to a cutter head of a cutter.

[0002]

2. Description of the Related Art In order to clamp and fix a cutter of a known cutter head, a hydraulic clamping bush is used in which a pressure medium is supplied via a piston. The pressing part for tightening the cutter is pressed outwards, the cutter being fixed in position in the receiving groove. The disadvantage of this known cutter head is that it is arranged radially in the cutter carrier so that the piston lies between the insert hole for inserting the spindle of the cutter head and the receiving groove, and thus the radial direction of the cutter carrier. The area becomes brittle. Furthermore, if the hydraulic clamping bush or piston breaks and the hydraulic medium leaks, the cutter may loosen.

In the cutter head known from EP-A-0182037, the cutter is clamped by steel balls housed in the housing groove and in contact with each other. The steel balls are pressed against one another by means of a positioning part which is designed as a set screw. In this case, the steel balls alternately move inward and outward in the radial direction and press the bottom of the accommodation groove and the contact surface of the cutter. The steel balls can only make point-like contact with the attached facing surfaces, so that these facing surfaces and the steel balls are also exposed to a correspondingly high load and are therefore also highly worn.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to construct a cutter head of this kind as follows, i.e. to securely clamp the cutter with a simple construction and without significantly degrading the cutter carrier. The structure is such that it can be fixed and the parts involved in the tightening process are not subjected to high loads.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention has a pressing portion formed in a substantially cylindrical shape and having at least one flat tightening surface on the surface thereof. The pressing part is in contact with the tightening facing surface on the cutter head side, and the pressing parts are in contact with each other by the wedge surface on the end face side.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

The cutter head shown in FIGS. 1 to 10 is used for cutting, forming notches and the like in wood and plastic processing machines. The cutter head is disposed on a spindle (not shown) in use, and is connected to the spindle so as not to rotate relative thereto. The cutter head is hydraulically fixed to the spindle for high feed rates and high quality surfaces.

The cutter head shown in FIGS. 1 to 3 has a cylindrical cutter carrier 1. The cutter carrier 1 has accommodating grooves 2 that are arranged at intervals along the outer circumference thereof, and the cutters 3 are accommodated in the accommodating grooves 2. For simplicity, only one receiving groove is shown in the drawing. The receiving groove 2 has a substantially trapezoidal shape in the end view of FIG. 1, and has side walls 4 and 5 that converge toward the outside and face each other. The bottom connecting the side walls 4 and 5 is made up of three bottom parts 6, 7, 8.
The bottom parts 6 and 8 are respectively connected vertically to the side walls 4 or 5 and are connected to each other via an intermediate bottom part 7 which extends substantially vertically to the bottom part 8. The middle bottom part 7 forms a step between the bottom parts 6 and 8. The bottom portion 8 is deeper than the bottom portion 6 with respect to the outer circumference of the cutter carrier 1. The longer wall 5 is contacted by the cutter 3 by means of a cutter back part 9 with teeth (not shown) which preferably extend substantially parallel to the axis.

The cutter 3 is fixed to the housing groove 2 by using a tightening unit. The tightening unit has a pressing portion 10 and a tightening portion 11. The tightening portion 11 has a substantially rectangular cross section. The wider longitudinal surface of the tightening portion 11 is configured obliquely for contacting the cutter 3 and is in contact with the chest surface 14 of the cutter 3 by its flat bevel 13. The slope 13 is located parallel to the side wall 5 of the accommodation groove 2. Tightening part 1
The narrow surface 15 of the first outer side in the radial direction has a fastening groove 16 (FIG. 11). The cutter 3 is mounted on the bottom part 8 by means of a flat narrow surface 18 on the side opposite the cutter edge 17. However, it can also be arranged at a distance from the bottom part 8. The pressing portion 10 operates the tightening portion 11 to tighten and fix the cutter 3 in the housing groove 2. The clamping part 11 advantageously extends over substantially the entire axial length of the cutter carrier 1 and the cutter 3, while the pressing part 10 comprises the clamping part 11.
Shorter than that (Fig. 2).

The pressing portion 10 is provided on the lower surface 12 which is located inward of the tightening portion 11 in the radial direction and has a cross section of approximately U.
It is arranged in the V-shaped long groove 19 (FIG. 11). Long groove 19
Is open radially towards the inner flat narrow surface 12 and is defined by the longitudinally extending side walls 20 and 21 of the clamping portion 11 and the bottom 22 (FIG. 1).
1). The long groove 19 has radial expansions or recesses 23 and 24 on the end side (FIGS. 2 and 3), and the recesses 23, 24
The long groove 19 is deeper than the other regions in the region. Long groove 1
9 is defined at the end by the end walls 19a and 19b of the fastening part 11 (FIG. 2). End walls 19a and 19
Holes 25 and 26 for a stopper 27 and a position adjusting portion 28 penetrate through b. The holes 25 and 26 extend obliquely from the end face 60 of the fastening part 11 in the direction of the bottom part 6, respectively.

In the illustrated embodiment, the pressing portion 10 comprises seven pressing wedges 29 to 35. Each of these pressing wedges 29 to 35 has the same cross section and a trapezoidal vertical cross section (FIG. 2). The pressure wedges 29 to 35 are arranged in series with each other to form a pressure rod and are in contact with each other as shown in FIG. The intermediate pressure wedges 30 to 34 have the same configuration. The pressing wedges 30, 32, 34 are arranged identically every other one, and each has a larger base surface 3.
It contacts the groove bottom 22 by 6 to 38. The pressure wedges 31 and 33 between them are in contact with the groove bottom 22 by the smaller base surfaces 39 and 40 in the non-tightened state. The pressing wedges 29 and 35 on the end side are different from the other pressing wedges 30 to 34 in that they have side surfaces 41 with different lengths.
Through 44. Outer sides 41 and 44
Is shorter than the other sides 42 and 43. Other side 42
And 43 are sides 45 and 46 of the adjacent pressure wedges 30 and 34.
Is configured the same as.

The pressing portion 10 is in contact with the stopper 27 by one pressing wedge 29. Stopper 27
Are formed by screws in the illustrated embodiment. This screw is screwed into a hole 25 which is configured as a screw hole. The side surface 44 of the pressing wedge 35 on the other end side
The position adjusting portion 28 is in contact with the. Position adjustment part 28
Is configured as a screw like the stopper 27.

A holding part 47 is provided for fixing the pressing part 10 or its pressing wedges 29 to 35 in the groove 19 of the tightening part 11. The holding part 47 is fixed to the fastening part 11 and is preferably a holding plate (FIGS. 1 to 3). The holding part 47 is made thin and the screw 4
It is fixed to the fastening part 11 by means of 8 and 49 (FIG. 2).

The pressure wedges 29 to 35 are preferably made of round material, so that the pressure wedges 29 to 35 are easy to manufacture. On the other hand, the pressure wedges 29 to 35 can also have other cross sections, for example square cross sections. Wedge 2 pressed by holding part 47
9 to 35 are held in the position shown, in which position the pressing wedge 29 to 35 is located on its side or wedge face 42.
46 to 52 and 59 to 59, and in the non-tightened state, they contact the bottom of the long groove 19 by the narrow base surface or wide base surface of the trapezoidal cross section. In the axial direction, the pressure wedges 29 to 35 are between the stopper 27 and the position adjusting portion 28. Pressing portion 10, stopper 27, position adjusting portion 28, and holding portion 4
The clamping part 11 with 7 can be connected to one pre-assembled unit. This unit is inserted into the accommodating groove 2 attached to fix the position and the fastening of the cutter 3 as a whole. Instead of a pressure screw or a clamping screw as the position adjusting part 28, a spring, a hydraulic or pneumatic piston can be provided. A hydraulic or pneumatic piston can be used to operate the hydraulic or pneumatic medium for tensioning the pressure wedges 29 to 35.

To tighten the cutter 3, a pressure screw or tightening screw 28 is screwed into the hole 26 of the tightening portion 11 in the direction of arrow P in FIG. The pressing screw or the tightening screw 28 has a pressing member 61 at its free end, and the pressing member 61 causes the screw 28 to contact the wedge surface 44 of the pressing wedge 35. The axes of the screw 28 and the pressing member 61 are located perpendicular to the wedge surface 44.

When the screw 28 is screwed in, the pressing member 61 of the screw 28 is pressed against the adjacent pressing wedge 35.
The pressing wedge 35 applies a feed force to the adjacent wedge surface 43 of the pressing wedge 38 via the wedge surface 46. This feed force has a horizontal component and a vertical component. Each pressure wedge provides a corresponding feed force to the adjacent pressure wedge. As a result, the pressing part 10 is pressed against the stopper 27, and the intermediate pressing wedges 30, 32, 34 are pressed against the clamping part 11 in the direction of the arrow P'in FIG. On the other hand, the pressing wedges 29, 31, 33, and 35 have the bottom portion 6
Receives a force directed in the direction of. In this case, the holding plate 47 is elastically curved and contacts the bottom portion 6, so that the pressing wedge can be supported by the bottom portion 6 via the holding plate 47.
The holding plate 47 is pressed against the cutter 3 by the force acting on the tightening portion 11 in the following manner:
And between the adjoining side walls 5 of the receiving groove 2, whereby the holding plate 47 is pressed in such a way that it is perfectly fixed in that position. In this way, a very long cutter 3, in particular, can be satisfactorily clamped and fixed over its entire length. Since the pressing portion 10 is composed of a plurality of pressing members that are in contact with each other by wedge surfaces, and the pressing members are shorter than the length of the tightening portion 11, it is necessary to manufacture the pressing wedges 29 to 35 accurately with respect to the tightening portion 11. Absent. In any case, with the above configuration, every other pressing wedge is fastened to the tightening portion 11
It can be pressed against the groove bottom 22 of.

The pressing wedges 29 to 35 are provided with position fixing elements so that the pressing wedges 29 to 35 are precisely aligned with each other axially and circumferentially.
This position-fixing element can prevent the pressure wedges from rotating relative to each other. This causes the pressing wedges 29 to 35 to have their corresponding wedge surfaces 42, 45; 52, 53;
54, 55; 56, 57; 58, 59; 43, 46 are guaranteed to be in surface contact with each other. Therefore,
The clamping force produced by the screw 28 as described above is maintained during machining with the cutter head.

The flat sides 75 and 76 (FIG. 13) of the pressure wedges 29 to 35 are used as position fixing elements. The side surfaces 75 and 76 allow the pressing wedges 29 to 3
5 contacts the corresponding facing surface in the tightened position. This configuration is shown in FIG. 11, for example, by pressing wedges 33 and 3
Illustrated for 2. The pressure wedges 33 and 32 are pressed against the retaining plate or groove bottom 22 not shown in FIG. 11, as described above.

As can be seen from FIG. 11, it is not necessary to provide a retaining plate. In some cases it may be advantageous to clamp a suitable pressure wedge directly against the bottom part of the receiving groove 2 (FIG. 1). In the clamped state, the pressure wedge makes surface contact with the corresponding opposing surface by its side surfaces 75, 76. It is thus ensured that the pressure wedges 29 to 35 are aligned correctly with respect to one another, so that the force generated by the screw 28 is perfectly transferred to the pressure wedges 29 to 35 via the wedge surfaces.

The side surface 75 of each pressing wedge 29-35,
The spacing of 76 is such that the strips 77, 78 are aligned with each other.
Slightly smaller than the spacing between (Fig. 11). Fine section 7
7, 78 project beyond the side walls 20, 21 of the long groove 19 and are located at the height of the lower surface 12 of the tightening portion 11. The pressing wedges 29 to 35 have side surfaces 75 and 76.
Is inserted into the long groove 19 in parallel with the end faces of the strip portions 77 and 78. Next, the pressing wedges 29 to 35 are provided in the long groove 1
It is rotated in 90 to each mounting position of 90 °. In this case, the pressing wedges 29 to 35 are provided on the strip portion 7.
Since 7, 78 are provided, it can no longer slip out of the long groove 19. Due to the strip portions 77 and 78, it is not necessary to provide the holding plate 47. The corresponding pressing wedge projects from the long groove 19 between the strips 77, 78 in the tightened position, the corresponding side surface 75 or 76 of which lies in the receiving groove 2.
Supported on the bottom part 6 of the. This configuration is illustrated in FIG. 11 for the pressure wedge 33.

The elongated groove 19 provided in the clamping part 11 is appropriately deep so that the pressing wedges 29 to 35 can be clamped to the groove bottom 22 and the bottom part 6 by corresponding forces.

The wedge angle α of the pressing wedges 29 to 35
(FIG. 12) is preferably 45 °, which is in any case less than the angle at which automatic braking occurs. Therefore, during the tightening process, the pressure wedges that are in contact with each other can be perfectly displaced from each other. Since the pressing wedges are in surface contact with each other and their side surfaces are in surface contact with the opposite surface, wear is minimized and optimum force transmission is ensured.

The main difference between the embodiment shown in FIG. 4 and the previous embodiment is that the pressing portion 10 'is provided outside the receiving groove 2'in the long groove 19' of the cutter carrier 1 '. That is. The long groove 19 'has substantially the same structure as that of the embodiment shown in FIGS. 1 to 3, and is formed by a recess provided in the bottom portion 6'of the receiving groove 2'. The long groove 19 'is located symmetrically with respect to the accommodation groove 2', and the outside is closed by a holding plate 47 '. The holding plate 47 'is fixed to the bottom part 6'by its longitudinal edge,
It prevents the pressure wedge in 9'from falling off.
The tightening portion 11 'is a strip portion 7 as shown in FIG.
In case of having 7, 78, of course, the holding plate 47 '
Need not be provided. The tightening portion 11 'has a long groove 19
Except for the above, the tightening portion shown in FIGS. 1 to 3 has the same structure. The pressing portion 10 'is also constructed in the same manner as in the above embodiment. The long groove 19 'is closed at both ends by the end faces of the cutter carrier 1'. On this end face, a stopper and a position adjusting portion are supported as in the case of the above embodiment. The stopper and the position adjusting portion are provided at a deep position and therefore do not project in the axial direction. When a position adjusting part (not shown) is screwed in, the intermediate pressing wedge of the pressing part 10 'exerts a pressing force directed radially outwards on the tightening part 11' in the manner previously described, while a pressing wedge lying in between. Are pressed radially inward against the bottom 22 'of the slot 19'. The retaining part or retaining plate 47 'is elastically curved and abuts the flat lower surface 12' of the clamping part 11 '. The clamping part 11 'is thus loaded by the pressure wedge in the above-described manner in the direction of the arrow P', whereby the cutter 3'is clamped and fixed between the slope 13 'of the receiving groove 2'and the side wall 5'.

The embodiment of FIG. 5 differs from the embodiment of FIG. 4 in that a long groove 19 ″ is provided on the side wall 4 ″ of the receiving groove 2 ″ for receiving the pressing portion 10 ″. Only. The pressing wedge of the pressing portion 10 '' is a holding portion or holding plate 4
It contacts with the side which opposes the cutter 3 '' of the fastening part 11 '' via 7 ''. Pressing part 10 "and tightening part 1
The 1 ″ and the receiving groove 2 ″ are otherwise configured in the same manner as in the above embodiment. During the tightening process, the tightening portion 11 '' is pressed against the cutter 3 '' by the pressing wedge of the pressing portion 10 '' against the cutter 3 '' in the above-described manner, so that the cutter 3 '' is securely tightened and fixed in the accommodation groove 2 ''. To be done. The long groove 19 ″ is the strip 7 as shown in FIG.
In the case of having 7, 78, it is not necessary to provide the holding plate 47 ″.

In the embodiment shown in FIG. 6, only the pressing part 10 "'is provided in order to tighten the cutter 3'" in the receiving groove 2 '"of the cutter carrier 1'". The pressing portion 10 ′ ″ is provided in the long groove 19 ′ ″ of the cutter carrier 1 ′ ″. In the case of this embodiment, no tightening part is required. The long groove 19 ′ ″ is configured as a recess provided in the side wall 4 ′ ″ of the accommodation groove 2 ′ ″. The pressing wedge (not shown) of the pressing part 10 ′ ″ has a holding part 4 ′ in the slot 19 ′ ″.
7 '''prevents falling off. Holding part 4
As in the case of the embodiment shown in FIG. 5, 7 ″ ′ is a flat surface provided on the side wall 4 ″ ′ of the receiving groove 2 ″ ′ so as to contact the long groove 19 ″ ″ by its longitudinal edge. It is fixed in the recess. This allows the cutter 3 '''to be tightened
Can contact the side wall 4 '''following this flat recess. The long groove 19 '''is closed at its end by the end face of the cutter carrier 1''' in the manner described above. The pressing wedge contacts a stopper (not shown) and a position adjusting portion (not shown). The stopper and the position adjusting portion are arranged at deep positions on the end surface of the cutter carrier 1 '''. In this embodiment, the pressing wedge of the pressing portion 10 '''is directly held by the holding portion 4'.
Acts on the cutter 3 '"via the 7"'. Tightening groove 1
6 ″ ′ is provided in the cutter carrier 1 ′ ″ so as to be located in front of the cutter 3 ′ ″, and in the outer periphery from the side wall 4 ′ ″ to the front in the rotation direction of the cutter carrier 1 ″ ″. It is extended.

The purpose of providing the holding parts 47, 47 ', 47 ", 47'" is the same as the purpose of providing the strips 77, 78, that is, the long grooves 19, 19 ', 1 to which the pressing wedges are attached.
This is to prevent falling off from 9 ″ and 19 ″ ′. When the strip portions 77 and 78 are provided, the strip portions 77 and 78 serve as a slip-out preventing function, and thus the holding portion 4 is provided.
It is no longer necessary to provide 7,47 ', 47'',47'''. Another function of the retaining part is to prevent dust from reaching the slots and contaminating the pressure wedge. Contamination of the pressure wedge may not guarantee the slight mobility of the pressure wedge in some cases.

In the embodiment illustrated in FIGS. 1 to 6,
As described with respect to the embodiment illustrated in FIGS. 1 to 3, the pressing portion is operated individually for each cutter. However, it is also possible to operate all pressing parts in common and simultaneously with one clamping device. Such an embodiment is shown in FIGS. 7, 8 and 9.

In the embodiment shown in FIGS. 7 and 8, only one position adjusting portion 63 is provided instead of the pressing screw or the tightening screw 28 attached to each pressing portion.
The position adjusting portion 63 is formed by a position adjusting ring which is attached to the spindle 64 of the cutter carrier 1a and can be fixed in position with respect to the spindle 64. The position adjusting ring has a zigzag notch in the side view of FIG. 8 on the lower surface 66 facing the end surface 65 of the cutter carrier 1a. These notches cooperate with the pressing portions 10a and 10d as the position adjusting portion 63 rotates. The pressing portions 10a and 10d are configured substantially the same as the pressing portion 10 in the embodiment shown in FIGS. 1 to 3, except that the pressing area 35 on one side is different.
That is, a and 35d project beyond the end surface 65 of the cutter carrier 1a. The protruding end with the end faces 67 and 68 cooperates with the lower surface 66 or notch of the alignment part (ring) 63 bearing the end face.
When the pressing portions 10a and 10d are in the tightened position shown, the end surfaces 67 and 68 of the pressing portions are the convex portions 6 of the lower surface 66.
9 to 71, while before the cutter 3a is clamped and fixed in the housing groove 2a, it is in the regions 72 and 73 of the position adjusting portion 63 between the protrusions. Notch 66
Are formed as follows, that is, when the position adjusting part 63 rotates, the pressing wedges of all the pressing parts 10a and 10d press each other at the same time, and tighten the cutter 3a in the accommodation groove 2a in the manner described above. Is formed. A stopper corresponding to the stopper shown in FIG. 2 is provided at the end opposite to the position adjusting portion 63.

In the embodiment shown in FIGS. 9 and 10, the position adjusting portion 63 'is again constructed as a position adjusting ring. That is, the position adjusting portion 63 'positions all the pressing portions 10a' together and simultaneously. The position adjusting portion 63 'differs from the position adjusting portion 63 shown in FIGS. 7 and 8 in that the lower surface 66' is configured as a flat ring surface. The end surface 67 'of the pressing area 35a' on the end side contacts the ring surface. The position adjusting portion 63 ′ has a female screw, and the position adjusting portion 63 ′ is screwed to the male screw 74 of the spindle 64 ′ by this female screw. If the position adjusting portion 63 'is used, all the cutters 3a' of the cutter head are pressed to the pressing portion 10a 'and the tightening portion 1 as in the above-described embodiment.
Common and easy tightening is possible via 1a '. For this reason, the position adjusting part 63 'is screwed onto the spindle 64' in the direction of the cutter head 1a ', whereby the pressing wedges of all pressing parts 10a' are pressed against one another in the manner previously described, and the cutter 3a 'is pressed.
Is tightened.

Instead of the mechanical position adjusting parts 63, 63 'it is of course possible to provide other position adjusting devices for simultaneously tightening the cutters. For example, the pressing portion can be commonly operated via a hydraulic or pneumatic position adjusting device or another position adjusting device. In any case, the cutter is simply and quickly clamped in the tool carrier or the cutter head by means of the clamping part and the pressing part, or only the pressing part as in the embodiment shown in FIG. You can

The tightening device in the embodiment shown in FIGS. 7 to 10 can also be constructed in the same way as the tightening device in the embodiment shown in FIGS. 4 to 6.

Next, the advantageous configurations of the present invention will be listed.

(1) The tightening surfaces (75, 76) are wedge surfaces (42, 45; 52, 53; 54, 55; 56, 5).
7; 58, 59; 43, 46), which are arranged so as to form an acute angle.

(2) The cutter head according to the above item 1, wherein the pressing portion (29 to 35) has two tightening surfaces (75, 76) parallel to each other.

(3) The cutter according to the above-mentioned item 2, wherein one tightening surface (75) is shorter than the other tightening surface (76) in the axial direction of the pressing portions (29 to 35). head.

(4) The above-mentioned items 1 to 3, wherein the pressing portions (29 to 35) are housed in the long grooves (19, 19 ', 19 ", 19'"). The cutter head according to any one of 1.

(5) The long groove (19) is provided in the tightening portion (11) provided in the accommodation groove (2) of the cutter carrier (1) and in contact with the cutter (3) to be tightened. The cutter head according to the fourth item above.

(6) The cutter head according to the above item 5, wherein the long groove (19) is formed narrow on the side facing the bottom portion (22).

(7) The narrow portion of the long groove is the two vertical strips (77, 78) of the tightening portion (11) and crosses the side walls (20, 21) of the long groove (19) toward each other. Cutter head according to item 6 above, characterized in that it is defined by two projecting vertical strips (77, 78).

(8) The space between the vertical strips (77, 78) is larger than the space between the two tightening surfaces (75, 76) of the pressing portions (29 to 35). The cutter head according to item 7.

(9) The pressing portion (29 to 35) has a diameter larger than a distance between the vertical strips (77, 78), and the above-mentioned item 7 or 8 is provided. Cutter head.

(10) Long groove (19 ', 19'',19''')
Is provided in the cutter carrier (1 ′, 1 ″, 1 ′ ″), the cutter head according to the above item 4.

[0043]

In the cutter head according to the present invention, the pressing portions contact each other by the wedge surfaces on the end face side thereof, so that the force transmission by the flat surface is achieved.
The pressing portions that are in contact with each other move alternately outward and inward because the wedge surfaces are provided, and the tightening surface of the pressing portion contacts the tightening facing surface on the cutter head side. Therefore, the force is transmitted by the flat surface even on these tightening surfaces, so that a high load on the components involved in the tightening process is avoided. Furthermore, since the pressing parts are supported in surface contact with each other and the pressing parts are supported in surface contact with the clamping facing surface, optimum force transmission is ensured, as a result of which the cutter is perfectly integrated in the cutter head. It is tightened and fixed with. There is therefore no risk of the cutter loosening while using the cutter head according to the invention.
The flat clamping surface of the pressing part also forms an anti-rotation element which prevents the pressing part from pivoting about its axis. During the tightening process, the pressing parts are aligned with each other via the wedge surfaces. In addition, the flat clamping surface is also aligned with the clamping opposite surface, so that the surface contact between the clamping surface and the clamping opposite surface for optimum force transmission is ensured with a simple construction.

As explained above, according to the present invention, the cutter can be securely fastened with a simple structure without significantly deteriorating the cutter carrier, and at that time, the parts involved in the fastening process can be secured. High load does not work

[Brief description of drawings]

FIG. 1 is an end view of a cutter head according to the present invention.

FIG. 2 is an axial cross-sectional view of a tightening unit provided in the groove of the cutter head, which is also used for tightening and fixing the cutter provided in the groove.

FIG. 3 is a partially enlarged view of the tightening unit shown in FIG.

FIG. 4 is an end view of another embodiment of the cutter head according to the present invention.

FIG. 5 is an end view of another embodiment of the cutter head according to the present invention.

FIG. 6 is an end view of another embodiment of the cutter head according to the present invention.

FIG. 7 is an end view of another embodiment of a cutter head according to the present invention with a clamping portion for clamping a plurality of clamping units.

8 is an end view of a portion of the cutter head of FIG. 7,
FIG. 7 is an end view showing only two pressing wedges.

FIG. 9 is a view corresponding to FIG. 7 of another embodiment of the cutter head according to the present invention.

10 is an end view showing the cutter head of FIG. 9 corresponding to FIG. 8, and is an end view showing only one pressing portion.

FIG. 11 is an enlarged cross-sectional view of a tightening portion having one pressing portion.

FIG. 12 is a side view of a pressing portion.

13 is an end view of the pressing portion of FIG.

[Explanation of symbols]

1, 1 ', 1'',1''', 1a Cutter carrier 2, 2 ', 2'',2''', 2a Housing groove 3, 3 ', 3'',3''', 3a Cutter 22 Tightening facing surface 29, 30, 31, 32, 33, 34, 35 Pressing wedge 42, 43, 45, 46, 52, 53, 54, 55, 5
6,57,58,59 Wedge surface 75,76 Tightening surface

Claims (1)

[Claims] 1. A cutter carrier, the cutter carrier having an accommodating groove for accommodating the cutter along an outer periphery thereof, the cutter being held by a pressing portion in the accommodating groove, In a cutter head in which the pressing parts can be pressed against each other by at least one position adjusting part so that the parts exert a tightening force in the direction of the cutter, the pressing parts (29 to 35) are configured substantially cylindrically and their surface At least one flat clamping surface (7
5,76), said flat clamping surface (75,76)
The pressing portion (29 to 35) is in contact with the tightening facing surface (22) on the cutter head side, and the pressing portion (29 to 35) has the wedge surface (42, 45; 52, 53; 54) on the end surface side. , 55; 56, 57;
58, 59; 43, 46) are in contact with each other.