DE9204587U1 - Milling cutter head with adjustable finishing cutting body - Google Patents

Description

Description

6 Milling cutter head with adjustable finishing cutting body

8 The invention relates to a milling cutter head with the features defined in the preamble of

&thgr; Claim 1. Such milling cutter heads with several,

10 interchangeable cutting elements are made of

11 "G. Spur, Th. Stöferle, Handbook of Manufacturing Technology, Vol. 3/1 - Machining,

12 Carl Hanser Verlag, Munich-Vienna",

13 Chapter 7 - Milling, p. 464 ff. It is also known from "G. Spur, Th. Stöferle ..." Chapter 7 &eegr; - Milling, p. 472 that such milling cutter heads can be combined with both roughing plates and finishing plates as cutting bodies.

ie. Especially when milling with high feed rates, the

17 Installation of wide finishing plates the workpiece surface in waviness and

18 roughness depth can be improved. The finishing plates are arranged in diameter behind the actual milling cutting plates, the roughing plates.

µgr; Despite a small axial runout deviation of milling tools with such

21 indexable inserts, it is necessary, especially for the positioning of the

22 finishing plates to provide a fine adjustment in the workpiece holder.

23 Such a fine adjustment is also known from "G. Spur, Th. Stöferle ..."

24 Chapter 7 - Milling, p. 472, Figure 51.

26 The disadvantage of this known construction is the need for two

a? different tool holders for roughing plates and

28 finishing plates. Another disadvantage is the high conversion effort from a

ze roughing plate holder into a finishing plate holder. In particular,

µgr; This results in high and therefore costly set-up times.

32 From the

33 DE-OS 1 552 329

34 a milling cutter head with an adjustable tool holder is known.

35 The disadvantage here is the floating bearing of a prismatic adjustment element both against the cutting body and against the tool shank.

March 31, 1992

&igr; The invention is based on a

2 DE-PS 1 602 795

3 for a milling cutter head known tool holder for roughing plates

4. According to this state of the art, the cutting body is in a

5 cutting body seat forming recess and lies with its

&bgr; Guide surface on an inner wall of the recess is longitudinally adjustable and is

7 with its contact surface on a recess in the

&bgr; recess inner wall supporting plate element. The

&bgr; Cutting body is located in this known cutting body seat permanently

io is secured in position, but its position cannot be adjusted or repositioned.

12 The invention is based on the object of providing a milling cutter head of the type

13 mentioned type and to simplify it in its

14 To improve user-friendliness. This object is achieved by the combination of features stated in claim 1.

&igr;? The plate element located next to the cutting body has a

is an expandable slot. The slot with its contact surface on the plate element

The adjacent cutting body is increasingly widened by the expansion of the slot

20 movable out of the recess forming the cutting body seat and

21 is therefore adjustable and readjustable.

23 It is particularly advantageous from a manufacturing point of view that the milling cutter head

24 basically only have one type of recess as cutting body seat

25. It is completely irrelevant whether the milling cutter head is ultimately used as

26 pure roughing tool or as a combined roughing and

27 finishing tool is to be used. For the mounting of roughing plates

28 The cutting bodies used are still those known from DE-PS 1 602 795

29 plate elements can be reused. To accommodate sizing plates, the known plate elements are replaced by the inventive,

31 slotted plate elements. The outline shape of both the known

32 plate elements as well as the plate elements according to the invention is thus

33 congruent. The inventive plate elements differ in

34 essentially by the inventive slot from the known

35 panel elements.

March 31, 1992

&igr; The production of milling cutter heads with the same recesses as

2 Cutting body seat is simple and inexpensive to manufacture. The

3 plate elements can be advantageously manufactured with one tool,

4 wherein the plate elements according to the invention are in a final operation

5 only need to be slit. In the manufacture of the inventive

6 knife heads therefore result in a large number of identical parts.

8 The countersunk screws mentioned in claims 2 to 5 are

9 are standard parts according to DIN 7969 or DIN 965. In particular, it is advantageous to

10 Countersunk screw according to the teaching of claim 3 both for fixing the &ugr; cutting body and for spreading the slot and thus for

12 Adjustment of the cutting body. In this way, the

13 Fixing function and adjustment function advantageously combined in one component.

is The design of the plate element according to claim 4 ensures a powerful

16 and positive mounting of the plate element in the cutting body seat

&eegr; serving recess. This solid fixation of the plate element in the

is recess is through the fixed area spreadable against the

19 Contact surface of the cutting body pressing adjustment cheek advantageous

µm. The plate element designed according to claim 4 combines the

21 Advantages of a static fixation of the plate element by the

22 Fixed area in the recess with a floating bearing of the

23 cutting body on the adjustment cheek. The countersunk screw is used to

24 Adjustment cheek can be continuously moved away from the fixed area, whereby the

25 cutting bodies are continuously adjustable and re-adjustable.

27 Due to the pivoting of the plate element around the countersunk screw

28 according to claim 5, the plate element is designed for the tension of different

29 cutting bodies can be used.

31 The essentially parallel course of the slot in the

32 Plate element and the contact surface of the cutting body on the plate element

33 ensures that the slot can be easily inserted into the

34 the plate element. In addition, the leverage of the adjustment cheek is

35 such a parallel course of slot and contact surface is particularly favorable. se Furthermore, twisting of the cutting body in the recess during

37 adjustment is prevented. It is also guaranteed that even in the event of a

The large angle of the adjustment cheek from the fixed area

March 31, 1992

% 4

&igr; sufficiently large contact surface between adjustment cheek and contact surface

2 is present.

4 Claims 7 and 8 relate to particularly advantageous embodiments of the

5 individual side surfaces of the panel element. Due to the concave shape

6 of the recess and the adapted convex course of the

7 Wall front side of the panel element according to claim 7, the

&bgr; plate element automatically when installed in the recess. In addition to this

9 The concave-cylindrical design of the recess has a self-centering effect

10 and the corresponding convex-cylindrical design of the wall face

11 of the plate element has the advantage that the recess can be easily removed during the manufacture of the

12 milling cutter heads can be manufactured with one tool. Both the

13 Inner walls of the recess as well as the recess floor on which µ both the plate element and the cutting body in the installed state

is resting, can be in one operation from a face milling cutter to the

The milling cutter head can be milled in. In addition, this allows

&igr;? inventive design, on the otherwise necessary corner hole in

the recess inner wall must be dispensed with.

20 The convex wall face, designed like a cylinder surface,

21 of the plate element and the correspondingly concave inner wall of the

22 recesses work together advantageously in the manner of a surface guide.

23 this large common contact surface from the wall face of the

24 plate element and the inner wall of the recess is a permanent

25 Form-locking of the plate element in the recess is ensured. Due to

26 the transferable high forces between the plate element and the recess and

27 This ensures particularly rigid clamping of the cutting body in the recess between the plate element and the milling cutter head.

30 The planar active surface of the plate element mentioned in claim 8, which is

31 cutting body, enables a high surface pressure of the

32 cutting body with its contact surface on the effective surface. The plane

33 The design of the effective area also allows the use of standardized

34 indexable inserts as cutting bodies. In addition, the plate element is equipped with the

35 plan active surface and the plan inactive surface, which is at an obtuse angle to the active surface, can easily be cut from a circular plate element blank at

37 can be cut out during panel element production.

March 31, 1992

&igr; The development of the invention according to claim 9 relates to a particularly

2 advantageous clamping of the

3 cutting bodies on the milling cutter head by means of a clamping bolt.

s The milling cutter head according to the invention is shown in the drawings

&bgr; illustrated embodiment with further essential features of the invention

7 characteristics are described. They show:

&bgr; Fig. 1 is a perspective partial view of a halved cut

io cutter head,

&ugr; Fig. 2 a plan view of the finishing plate and the slotted

12 Plate element in radial direction according to arrow Il in Fig. 1,

&eegr; Fig. 3 the side view of the finishing plate, seen against the

&eegr; Rotation direction of the milling cutter head according to arrow III in Fig. 2,

Fig. 4 shows an embodiment with roughing plate and

the unslotted plate element in the perspective of Fig. 2,

&igr;? Fig. 5 is a side view of the embodiment roughing plate seen against

ie the direction of rotation of the milling cutter head according to arrow V in Fig. 4.

20 The milling cutter head 1 shown in Fig. 1 is a face milling cutter with several

21 cutting elements, the roughing plates 2 and the finishing plate 3. For face milling

22, the milling cutter head 1 with its spindle bore 4 is positioned on the

23 drawings not shown milling spindle clamped and from this in or

24 against the direction of rotation 5. The milling spindle runs in

25 axial direction 6, while the roughing plates 2 and the finishing plate 3 are

26 Milling cutter head circumference distributed in radial direction 7 on the

27 milling cutter head 1 are mounted.

29 As shown in Fig. 2 and Fig. 4, both the finishing plate 3 (Fig. 2)

as well as the roughing plate 2 (Fig. 4) approximately in the axial direction 6 a

31 axial projection 8 over the body of the milling cutter head 1. The

32 Axial projection 8 is larger for the finishing plate 3 than the axial projection 8 for

33 of the roughing plate 2. In the axial direction 6 and the radial direction 7

34 vertically extending tangential direction 9 have the finishing plate 3 (Fig. 2)

35 and the roughing plate 2 (Fig. 4) have a tangential projection 10, whereby the

36 Tangential projection 10 of the finishing plate 3 is larger than the

37 Tangential projection 10 of the roughing plate 2. The larger projections 8,10 of the finishing plate 3 in the axial direction 6 and

March 31, 1992

&igr; Tangential direction 9 ultimately determine the greater cutting depth of the

2 finishing plate 3 opposite the roughing plates 2 and enable the

3 Finishing by the finishing plate 3.

5 The recess 11 in the milling cutter head 1 serves as a cutting insert seat for

β both the finishing plate 3 and the roughing plates 2 are formed. It is

7 particularly advantageous, the recess 10 from the body of the milling head 1

β using a ball milling cutter in one operation and a

9 incision machining. The roughing plate 2 and the finishing plate 3

10 lie with their guide surfaces 12 each on a flat area 13 of the

11 inner wall of the recess 11. Both the roughing plate 2 and the

12 Finishing plate 3 has a radial direction 7

13 extending mounting hole 14, into which a clamping bolt (not shown in the drawings) for holding the roughing plate 2 or the

The finishing plate 3 can be inserted into the milling cutter head 1.

&igr;? In the axial direction 6 next to the roughing plate 2, the plate element 15 is

ie arranged. The plate element 15 lies with its effective surface 16 on the

the contact surface 17 of the roughing plate 2. The roughing plate 2 rests with its

20 contact surface 17 abuts against the effective surface 16. In the tangential direction 9

21, the plate element 15 has the obtuse-angled to the effective surface 16

22 inactive area 18. The active area 16 and the inactive area 18 are facing away

23 the wall face 19 of the plate element 15. The wall face 19 is in

24 Seen in radial direction 7, i.e. in the perspective of Fig. 4, circular

25. The wall face 19 is therefore a radially extending 7 and

26 Cylindrical surface extending in the tangential direction 9. The

27 cylindrical surface defining the plate element 15

28 Wall face 19 rests against a concave area 20 of the inner wall of the 2β plate element 15. This concave inner wall area 20 of the

so plate element 15 is complementary to the cylindrical wall face 19 of the

31 plate element. Those areas of the concave

32 inner wall area 20, which touch the wall face 19, form with the

33 Wall front face 19 a surface guide.

35 The plate element 15 is fixed in the radial direction 7 into the

se milling cutter head 1 screw-in fastening screw 21 in the

37 Recess 11 fixed force-fitting. In tangential direction 9 next to the

The fastening screw 21 is outside the recess 11 in the body of the

March 31, 1992

&igr; milling cutter head 1 which is used to fix the not shown in the drawings

The threaded pin 22 serving as the clamping bolt shown in Figure 2 is inserted.

4 Compared to the roughing plate described in Fig. 4 and Fig. 5

5 with the associated plate element 15 has the structure shown in Fig. 2 and 3.

6 Finishing plate 3, the following additional features:

a The finishing plate 3 rests with its guide surface 12 on the flat

9 Inner wall area 13 of the recess 11. For setting and adjusting the

10 relative position of the finishing plate 3 in the recess 11, in particular for

11 Adjustment of the axial projection 8, the finishing plate 3 is in the axial direction 6

12 arranged longitudinally displaceably along the flat inner wall area 13.

14 With its contact surface 17, the finishing plate 3 rests in axial direction 6 on

is the effective area 160 of the slotted plate element 150. The slotted

The plate element 150, like the non-slotted plate element 15,

&eegr; an inactive surface 180 arranged at an obtuse angle to the active surface 160.

Analogous to the non-slotted plate element 15, the

The wall face 190 of the slotted plate element 150 as a cylindrical

20 shell surface. The slotted plate element 150 is located with this

21 cylindrical wall face 190 in the manner of a surface guide on the concave

22 Inner wall area 20 of the recess 11.

24 The slot 230 slitting the plate element 150 runs from the

25 Inactive surface 180 approximately in tangential direction 9 parallel to the contact surface 17 of the

26 Finishing plate 3. The slot 230 slots the plate element 150 in

27 In the radial direction 7 completely, but in the tangential direction 9 only partially.

29 The slot 230 divides the plate element 150 into the wall face

so that it rests against the concave inner wall area 20 of the recess 11

31 fixed area 240 and the axial direction 6 next to the fixed area

32 through the slot 230 spaced adjustment cheek 250. The

33 Representation of Fig. 2 at the inactive surface 180 beginning slot 230 runs

34 parallel to the contact surface 17 in tangential direction 9 and flows into the

35 Slotted corner hole 260. In the tangential direction 9 next to the slotted corner hole 260 is the

37 Bridging area 270.

March 31, 1992

&igr; The adjustment cheek 250 is separated from the

2 Fixed area 240 can be spread. The countersunk screw 280 penetrates the

3 fixed area 240 and the slot 230 in radial direction 7 and is in

4 Radial direction 7 can be screwed into the body of the milling cutter head 1. The

5 slotted plate element 150 is fixed to the &bgr; milling cutter head 1 by means of the countersunk screw 280. In this respect, the countersunk screw 280 fulfills the

7 slotted plate element 150 the fastening function of the

&bgr; Fastening screw 21 for the non-slotted plate element 15. The

9 Countersunk screw 280 is with its threaded shaft 290 in the body of the

10 milling cutter head 1. The conical screw head 300 runs

11 in radial direction 7 conically towards the milling cutter head 1. Due to the

12 Conicity of the screw head 300, the adjustment cheek 250 is adjusted with each

13 turns of the countersunk screw 280 into the milling cutter head 1 in

&eegr; Axial direction 6 further spread from the fixed area 240, whereby the

is slot 230 enlarged. This increasing spreading of the adjustment cheek

It is transferred to the finishing plate 3 in such a way that the finishing plate 3 is

&igr;? Axial direction 6 with its guide surface 12 along the plane

the inner wall area 13 is adjusted, whereby the axial projection 8 increases.

ie The adjustment and readjustment of the finishing plate 3 is carried out by lifting

20 and countersinking or screwing in and out the shaft screw 280 in

21 Radial direction 7 of the milling cutter head 1. The axial projection 8 increases with the

22 Screw-in depth of the shaft screw 280 into the body of the cutter head

24 In tangential direction 9 next to the countersunk screw 280 is outside the

25 Recess 11 analogous to the seat of the roughing plate 2 shown in Fig. 4

26 next to the slotted plate element 150 the threaded pin 22 for the

27 Clamping bracket of the finishing plate 3 arranged on the milling cutter head 1.

March 31, 1992

List of reference symbols Milling cutter head 280 Countersunk screw (150) Roughing plate 290 threaded shaft (to 150) 1 Finishing plate 300 screw head (150) 2 Spindle bore 3 Rotation direction 4 Axial direction 5 Radial direction 6 Axial projection 7 Tangential direction 8th Tangential overhang 9 Recess 10 Guide surface 11 flat interior wall area 12 Bracket hole 13 Plate element 14 (unslit) 15 Effective area Contact surface 16 Inactive area 17 Wall face 18 concave inner wall area 19 Fixing screw 20 Threaded pin 21 22

150 slotted plate element 160 active area (to 150) 180 inactive area (to 150) 190 wall front area (to 150) 230 slot (to 150) 240 fixed area (to 150) 250 adjustment cheek (to 150) 260 slotted corner hole (to 150) 270 bridging area (to 150)

Claims (1)

&igr; 91206-5/13
2 31 March 1992 5 Claims 8 1. Milling cutter head (1) with several distributed over the cutter head circumference &bgr; arranged, pocket-like recesses (11) for receiving 10 of a cutting body (2,3) such that the cutting body (2,3) 11 - with a side surface, the guide surface (12), on an inner wall (13) 12 of the recess (11) is longitudinally adjustable and 13 - with a further side surface, the contact surface (17), on a support in the &eegr; recess (11) against its inner wall (20) is plate element (15,150) is supported, ie characterized by &igr;? that the plate element (150) is provided with a between the inner wall (20) of the is recess (11) and the contact surface (17) for fine adjustment such ie expandable slot (230) is provided so that the cutting edge of a 20 cutting body (3) as finishing cutting body (3) the cutting edges of the remaining 21 Cutting body (2) protrudes. 23 2. Cutter head according to claim 1, 24 characterized by 25 that a conical expansion element can be introduced into the slot (230). 27 3. Cutter head according to claim 2, 28 characterized by 29 - that a countersunk screw (280) for releasably fixing the so plate element (150) can be screwed radially into the cutter head (1) and 31 - that its countersunk head (= 300) forms the expansion element. 31 March 1992 (U:\AN\91206-6.&Tgr;&KHgr;&eegr; &igr; 4. Knife head according to claim 3, 2 characterized by 3 that the plate element (150) is divided into two by a slot (230) in such a way that 4 - that between the inner wall (20) of the recess (11) and the 5 Countersunk screw (280) a fixed area (240) is clamped immovably &bgr; and 7 - that between the countersunk screw (280) and the contact surface (17) of the a cutting body (3) a spring-loaded from the fixed area (240) 9 Adjustment cheek (250) under the setting pressure of the countersunk screw (280) on &iacgr;&ogr; cutting body (3). 12 5. Cutter head according to claim 4, 13 characterized by &eegr; that the plate element (150) can be pivoted about the countersunk screw (280) is stored. 17 6. Cutter head according to one or more of the preceding claims, is characterized by ie that the slot (230) runs substantially parallel to the contact surface (17). 21 7. Cutter head according to one or more of the preceding claims, 22 characterized by 23 a concave profile of the inner wall (20) of the recess (11) and a 24 this concave course adapted convex curvature of the 25 Inner wall (20) adjacent wall face (19) of the 26 plate elements (150). 28 8. Cutter head according to one or more of the preceding claims, 29 characterized by so - a flat active surface (160) of the plate element (150) for supporting the 31 Contact surface (17) of the cutting body (3), 32 - a plane, obtuse-angled to the effective surface (160) 33 Inactive surface (180) of the plate element (150) and 34 - a convex wall face (190) in the manner of a cylinder surface 35 of the plate element. March 31, 1992 &igr; 9. Knife head according to one or more of the preceding claims, 2 characterized by 3 a recess (11) with an acute angle to the inner wall (20), 4 the cutting body (3) in a mounting hole (14) penetrating, in the 5 Clamping bolt that can be fixed to the knife head (1) as a clamp holder for the cutting body (3). March 31, 1992