JPS606348A - Bearing device for rotary grinding tool - 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 Field of the Invention The present invention relates to a bearing for an oral grinding tool, in which the single bearing for receiving the grinding tool on its end face has a spindle and a rotating body.

The rotary ILF cutting tool in the meaning of the present invention refers to a correction device for the shape of a correction disk, a tracing roller, a reshaping roller, and a grinding wheel.

In correction devices of prior art grinding machines, the correction spindle usually has an elongated receiving conical part.

For example, a coaxial conical hole formed in the profiling roller to be overfitted corresponds to this receiving conical part.

This arrangement has the following drawbacks. Since a defined axial positioning of the trench roller on the correction spindle is not possible, additional adjustments must be made to avoid the risk of axial displacement of the grinding wheel profile. . Also known are correction devices for grinding machines in which the correction spindle has a cylindrical receiving mandrel. The profiling roller used in this case is provided with a cylindrical hole corresponding to the receiving mandrel. If the rollers are accommodated in a modified spindle in this manner, the disadvantage is that the unavoidable manufacturing tolerances may impede a perfect circular rotation and thus distort the profile of the grinding wheel. be. Furthermore, in the two types of known correction devices mentioned above, special tools are required to determine roller replacement, which is extremely expensive.

In recent grinding machines that can automatically change the grinding wheel, the vertically long circular f-shaped part marked AfJ has a tendency to self-lock, making it virtually impossible to change the grinding wheel automatically. There is the inconvenience of doing so.

Problems of the present invention The problems of the present invention are as stated at the beginning: 1. With this type of bearing device, the grinding tool can be mounted and removed relatively easily, and the grinding tool can be precisely positioned in the axial direction. To provide a tool that can securely and immovably fix a 4i1F cutting tool at any time without interfering with perfect circular rotation.

Structure of the Present Invention The present invention solves this problem, in which the rotating body of the grinding tool has a conical portion coaxially extending in the axial direction and a stopper surface on the end face side, and the bearing is configured so that the spindle is connected to the rotating body. It has a conical portion corresponding to the conical portion and a stopper surface corresponding to the stopper surface of the rotating body.

Embodiments According to a particularly advantageous embodiment of the bearing device according to the invention:
The convex conical portion forming the outer cone is configured as a short trapezoidal cone, and the maximum diameter of the conical foot in the area near the stopper surface of this trapezoid forms the inner cone. It is larger than the diameter of the concave conical portion. Because the convex conical part is configured as a short trapezoid, tool changes can be carried out without any problems. By tightening the convex conical part onto the concave conical part, eliminating the risk of self-locking, a precise round rotation of the grinding tool is ensured.

As a correction roller equipped with a correction spindle for correcting the grinding surface of a grinding wheel, the rotating body of the correction roller is configured as a conical part with a convex shape on the end face side, and this conical shape It is advantageous if the portion engages in a concave conical portion of the correction spindle.

The rotating body of the correction roller has a coaxial and axis-parallel hole through which a tensile rod for tightening the correction roller in the correction spindle can be inserted. The corrective roller can be tightened particularly advantageously with a positive spindle.

In a grinding tool with a grinding spindle configured as a gamma wheel, it is particularly advantageous if the grinding spindle has an outer conical part which engages an inner conical part of the grinding wheel.

It is advantageous if the inner conical part is designed as a ring which can be inserted into the rotating body of the grinding wheel. To facilitate fitting the grinding wheel over the grinding spindle/L'K, the IIF grinding spindle has a cylindrical centering body that engages in the centering hole of the grinding wheel. It is supposed to be done. According to another embodiment of the invention, the blow air supply opens into a centering gear lug formed between the centering body and the centering hole.

The blow air supply section includes a blow air hole that passes through the centering body. In this manner, during the introduction of the centering body into the centering hole or
During the displacement of the conical part and thus the stopper surface, the blow air supply section is brought into contact with each other, and the blow air leaks out through the gradually narrowing gap between the seat surfaces, and in some cases, foreign matter and dirt particles that have entered are removed. It is designed to blow away.

Effects of the Invention According to the bearing device of the present invention, a special effect has been obtained in that the grinding tool has high perfect circular rotation accuracy and at the same time can always occupy an accurately defined position in the axial direction. .

This is especially important for tracing rollers. Housing: With the bearing device according to the invention, testing of grinding tools can be carried out considerably more easily. This is because, in the past, the grinding tool was extremely troublesome, and the work of installing and removing the grinding tool would be significantly reduced.

The bearing is drawn towards the spindle until the grinding tool always hits the axial stop surface, and the supporting force generated by the working pressure is accepted through the conical part, while the torsion is maintained by the stop surface. be reached. An additional advantage when using the bearing device according to the invention for correction rollers, in particular for profiling rollers, is that the profile dimensions of the profiling rollers can be reduced. This is because the profiling roller body, unlike known profiling roller bodies with a conical section or a coaxial cylindrical receiving hole, receives a tensile rod designed to tighten the profiling roller with a correction spindle. This is because the diameter of the hole for this purpose can be small.

Next, the groove structure of the present invention will be specifically explained with reference to the embodiment shown in the drawings.

In the longitudinal sectional view of the wheel correction device 1 shown in FIG. Correction roller and force ζ are shown. The bearing 2 is shown (not shown) fixed in the usual manner on the machine. The correction spindle 3 is rotatably journaled in a bearing 6 in the bearing 2. The correction spindle 3 is connected to a belt pulley 7, It can be driven by a motor (not shown) via a drive belt 8, for example a toothed belt.

According to the invention, the roller body of the profiling roller 4, which has a modified profiling surface on its outer circumferential surface 9, has on its end side a convex conical portion 11 configured as an outer cone and extending coaxially in the axial direction. A stopper surface 12 is provided. As can be seen from FIG. 1, this convex conical portion 11 is configured as a trapezoid with a short dimension.
The diameter dimension of the larger diameter part of 1 is the modified spindle/1
The dimensions are advantageously slightly larger than the inner diameter of the concave conical part 13, which is configured as an inner cone of /3.

In this way, the convex conical portion 11 of the profiling roller 4 can be reliably tightened within the concave conical portion 13, which results in a very good roundness 11.
You can get life. Similarly, the stopper surface 12 is replaced with the stopper surface 1.
By abutting against the end face of the correcting spindle 3 forming 2', a precise axial positioning of the roller 4 is obtained.

The profiling roller 4 is provided with a relatively narrow hole 14, and four tensile rods 116 are inserted into the hole 14, and the tensile rod 16 allows the profiling roller 4 to engage the nut 17 and securely attach it to the correction spindle 3. Be tight.

Another embodiment is shown in FIG. In a bearing 18, which is added to the grinding machine (not shown) in a known manner, two correction spindles 21 and 21' are rotatably mounted in bearings 19, 19'. The bearing 19' of the correction spindle 21' is axially movable in the sliding guide 22 so that the profiling roller can be replaced. The modified spindle /L/21.21' has a concave concave portion 23 or 23' configured as an inner cone, similar to the embodiment of FIG. 1 above. Peripheral wall surface 2
The profiling roller 24, which has a modified profiling surface (not shown in detail at 6), has on both end faces convex conical portions 27 and 27' configured as outer cones and a stop surface 28'. . The stopper surface 28 for this stopper surface 28' is formed in a modified spindle /v21, 21'. The convex conical part similarly has a short shape as a trapezoid, and the shape of this trapezoid is
The diameter dimension at the conical base of the associated stop surface area is slightly larger than the inner diameter of the concave conical portions 23 and 23' of the correction spindle 21 or 21', which carries the profiling roller 24. A tensile rod 31 is inserted through a narrow hole 29 formed in the profiling roller body, and this tensile rod 31 fixes the profiling roller 24 by means of a nut 32 on the concave conical portions of the spindles 21 and 21'. 23. Tighten within 23'. The finishing spindle drive path is configured similarly to that according to the embodiment of FIG.

The grinding wheel correction device according to the invention ensures precise axial positioning of the profile roller and very good rounding properties. At the same time, there are advantages in that the structure of the profiling roller is reduced and roller replacement is easy.

Whether roller replacement is carried out manually or automatically, the bearing device according to the invention allows it to be carried out simply and efficiently.

In the embodiment of FIG. 6, a number of grinding wheels 33,34
A support device for a grinding tool is shown, which is assembled into one set. The roller body is provided with a concave conical portion 36 configured as an inner cone. This concave conical portion 36 is fitted into the roller body in the form of a cylinder 3T. Size 7 Concave conical part 36 of this C
forms a bearing spindle <rt[cutting spindle/
It is fitted over the convex conical part 38 of the I/39, which is configured as an outer cone. The stop surfaces of the grinding wheel 33, 340 roller body and the grinding spindle 39 that collide with each other in the assembled state of the cutting tool are indicated by numerals 41 and '42. For easy assembly, the roller body is equipped with a cylindrical centering hole 43.
Inside is a grinding spindle 39 molded into a corresponding shape.
The centering body 44 of is intruding. Assembly and disassembly are carried out by an nK gripper 46, which is located inside the grinding spindle 1v39 and is indicated by a dash-dot line. This gripper 4G has a roller body installed using a bin 47v.
C acts. This mounting, which is not detailed in detail, is known and is described in detail, for example, in German Patent Application No. 6,246,168.

A centering gap uK formed between the centering hole 43 and the centering body 44 is open to the blow air supply section 4B. This blow air supply section 48 consists of a connection hole 49 that passes through the 4i1↑ cutting spindle 39 in the axial direction, and a number of blow air holes 51 that connect this connection hole 49 to the centering gap. When assembling the grinding wheel 33, 34, blow air is supplied to the blow air hole 51, and this blow air gradually increases the gap between the seating surfaces of the inner conical part 36 and the outer conical part 38, which move relative to each other. The speed of the whirring increases gradually, and the seat surfaces of the inner and outer conical portions 36, 38 and the stop surface 41, 42 are sprayed or cleaned by the blower.

The tightening conditions of the wheel wheels 33 and 34 shown in Figure 6! Whereas in a river, the radial supporting force acting in the direction of arrow 52 due to the grinding force acting on the workpiece from this grinding wheel is received by the inner conical part 36 and the outer conical part 38. , the torque produced by the drive of the grinding spindle 39 is applied to the stop surfaces 41 and 42.
is transmitted to the grinding wheel via.

[Brief explanation of drawings]

FIG. 1 is a schematic longitudinal sectional view of one embodiment of a bearing device according to the invention in a grinding wheel correction device, FIG. 2 is a schematic longitudinal sectional view of another embodiment, and FIG. 3 is a grinding wheel. 1 is a schematic longitudinal sectional view of an embodiment of a bearing device according to the invention; FIG. 1. Grinding wheel correction device, 2. Support stand, 3. Correction spindle, 4. Tracing roller, 61f11 receiver, γ.
・Belt wheel, 8. Drive belt, 9. Surrounding wall surface, 11.
・Conical convex portion, 12.12'...stopper surface, 13
...-conical part, 14.. hole, 16. tensile rod,
17...nut, 18...support stand, 19°19'...-
Bearing, 21.21'... Correction spindle, 22... Sliding guide, 23.23'... Conical part, 24...
Tracing roller, 26...peripheral wall surface, 27°27'...
Conical part, 28.28'... Stopper surface, 29 Hole, 31... Tensile rod, 32... Nut, 33.3
4. Grinding wheel, 36. Conical part, 3.
Ring, 3) 3... - Conical part, 39... Grinding spindle, 41.42... Stopper surface, 43... Centering hole, 44... Centering body, 46... Gripper, 47... Assembly pin , 48... Blow air supply section, 49... Connection hole, 51... Blow air hole, 52...
・Arrow (1 other person)

Claims (1)

[Scope of Claims] 1. A 1iiiII receiver for receiving a grinding tool on the end face side is a support fi for a rotating IT cutting tool having a spindle and a rotating body, in which the rotating body of the grinding tool is on the end face side. Coaxially axially extending conical portions (11; 27, 2
γ′; 36) and a stopper surface (12; 28; 41), and the bearing has a spindle /l/(3; 21, 21).
'; 39) is a conical part (13; 23, 23'; 3B) corresponding to the conical part of the rotating body, and a stopper surface (12') corresponding to the stopper surface of the rotating body.
28'; 42),
Support device for rotary grinding tools. 2. Convex cone-shaped part forming an outer cone (11
; 2γ, 2γ'; 38) is configured as a short conical trapezoid, and the maximum diameter of the conical foot in the vicinity of the stopper surface (12; 28; 42) is the inner cone. 2. The bearing device according to claim 1, wherein the diameter of the concave conical portion (13; 23, 23'; 3B) forming the shape is smaller than the diameter of the concave conical portion (13; 23, 23'; 3B). The grinding tool is a correction roller (/I; 24) which has a correction spindle /I/(3; 21, 21') which is designed to correct the grinding surface of the grinding wheel. The rotating body of the cup correcting roller 4; 24) has a convex conical portion (
11; 27. 27') configured as 1. and this conical portion (11; 2γ, 27') is connected to the concave conical portion (13; 23, 23'; 3) of the correction spindle.
6), the bearing device according to claim 1 or 2, which engages with item 6). 4. The recirculating body of the correction roller (24) has coaxial and axis-parallel holes (14; 29), and the nucleation (14)
;29), the modified spindle zl/(3;2
1. 21') in which a tensile rod (16; 31) for tightening the correction roller (4; 24) can be inserted. The bearing device according to item 1. 5 The grinding tool is attached to the grinding spindle (39) 1
a conical part (36) of the outer shelf of the grinding wheel (33, 34), in which the grinding spindle (39) engages with the inner conical part (36) of the grinding wheel (33, 34); 3
8). The support device according to claim 1 or 2, comprising: 6. The inner conical part (36) is the grinding wheel (3
6. The bearing device according to claim 5, wherein the bearing device is constructed as a ring (37) that can be inserted into the rotary body of the rotor (3, 34). Z The grinding spindle (39) has a cylindrical centering body (44), the centering body (44)
7. A bearing device according to claim 5, wherein the bearing device is adapted to engage in a centering hole (43) of a grinding wheel (33, 34). 8. Centering body (44) and centering hole (4)
A blow air supply section (48) opens into the centering gap formed between the blow air supply section (48) and the centering gap. A supporting device according to any one of claims 5 to 7. 9. The bearing device according to claim 8, wherein the blow air supply section (48) comprises a centering body (44) & a blow air hole (51) passing through the centering body (44). 10, the conical part (11, 13; 27° 23; 3
Fi, 38) The bearing device according to any one of claims 1 to 9, which is configured in a shape that does not perform self-locking.