METHOD FOR GRINDING A WORKPIECE WITH A GRINDING TOOL

Abstract

The present invention relates to a method for grinding of a workpiece with a grinding tool, wherein an axis of rotation of the grinding tool is oriented perpendicular to a feed plane of the grinding tool, comprising the following steps: a) Movement of the grinding tool at a first velocity into a machining region of the workpiece, b) Establishment of contact between the grinding tool and a first entry region of the workpiece at a second velocity, c) First traverse of the grinding tool at the second velocity through the workpiece along a predefined contour located in the feed plane, d) First extraction of the grinding tool at the second velocity from a first exit region of the workpiece, e) Establishment of contact between the grinding tool and a second entry region of the workpiece at a third velocity, f) Second traverse of the grinding tool at the third velocity through the workpiece along a horizontal traverse direction located in the feed plane, g) Second extraction of the grinding tool at the third velocity from a second exit region of the workpiece.

Claims

1. A method for grinding of a workpiece (1) with a grinding tool (2), wherein an axis of rotation (3) of the grinding tool (2) is oriented perpendicular to a feed plane (4) of the grinding tool (2), comprising the following steps: a) moving the grinding tool (2) at a first velocity (v1) into a machining region (5) of the workpiece (1), b) establishing contact by the grinding tool (2) with a first entry region (6) of the workpiece (1) at a second velocity (v2), c) traversing the grinding tool (2) at the second velocity (v2) through the workpiece (1) along a predefined contour (7) located in the feed plane (4), d) extracting the grinding tool (2) at the second velocity (v2) from a first exit region (8) of the workpiece (1), e) establishing contact by the grinding tool (2) with a second entry region (9) of the workpiece (1) at a third velocity (v3), f) traversing the grinding tool (2) at the third velocity (v3) through the workpiece (1) along a horizontal direction of traverse (10) located in the feed plane (4), and g) extracting the grinding tool (2) from a second exit region (11) of the workpiece (1) at the third velocity (v3).

2. The method for grinding of a workpiece (1) in accordance with claim 1, wherein the grinding tool (2) traverses in a total vertical engagement setting (z) at the third velocity (v3).

3. The method for grinding of a workpiece (1) in accordance with claim 2, wherein the first entry region (6) is oriented vertically offset to the first exit region (8) in the feed plane (4), wherein the first entry region (6) and the first exit region (8) are vertically offset relative to each other by less than, or the same as, the total vertical engagement setting (z).

4. The method for grinding of a workpiece (1) in accordance with claim 1, wherein the first entry region (6) extends over an essentially first vertical outer surface (12) of the workpiece (1), and over an essentially horizontal outer surface (13) of the workpiece (1) that is adjacent to the first vertical outer surface (12), wherein the first exit region (8) extends over an essentially second vertical outer surface (14) of the workpiece (1), wherein the second vertical outer surface (14) is located opposite the first vertical outer surface (12).

5. The method for grinding of a workpiece (1) in accordance with claim 4, wherein the first exit region (8) extends over the second essentially vertical outer surface (14) and the second exit region (11) extends over the first essentially vertical outer surface (12), wherein a greater vertical offset is formed between the first entry region (6) and the second exit region (11) than between the first exit region (8) and the second entry region (9).

6. The method for grinding of a workpiece (1) in accordance with claim 1, wherein the predefined contour (7) has an essentially linear, parabolic, logarithmic, exponential, or wave-like shape, or a superposition of at least two of the aforementioned shapes.

7. The method for grinding of a workpiece (1) in accordance with claim 1, wherein the predefined contour (7) and the horizontal traverse direction (10) subtend an angle () of 1 to 45, preferably of 15 to 30, particularly preferably of 20 to 25.

8. The method for grinding of a workpiece (1) in accordance with claim 1, wherein the axis of rotation (3) lies behind or within the first entry region (6) in the feed plane (4) in the course of the establishment of contact between the grinding tool (2) and the first entry region (6), along the horizontal direction of traverse (10).

9. The method for grinding of a workpiece (1) in accordance with claim 1, wherein the axis of rotation (3) lies in front of, or within, the second entry region (9) in the feed plane (4) in the course of the first extraction, and/or the establishment of contact with the second entry region (9) along the horizontal direction of traverse (10).

10. The method for grinding of a workpiece (1) in accordance with claim 1, wherein the first velocity (v1) is higher than the second and third velocities (v2, v3) respectively, wherein the second and third velocities (v2, v3) differ from one another, wherein the second and third velocities (v2, v3) are respectively constant in the course of an engagement of the grinding tool (2) with the workpiece.

11. The method for grinding of a workpiece (1) in accordance with claim 1, wherein the workpiece (1) is formed by a temporary workpiece (15) of a plurality of mutually parallel bandsaw blades (16), wherein a plurality of teeth of the temporary workpiece (15) are simultaneously ground by the grinding tool (2).

12. The method for grinding of a workpiece (1) in accordance with claim 1, wherein the workpiece (1) is held down and clamped before, and/or in the course of, movement of the grinding tool (2).

13. The method for grinding of a workpiece (1) in accordance with claim 1, wherein the workpiece (1) is displaced parallel to the axis of rotation (3) after the second extraction, and at least the steps b) to f) are repeated.

14. The method for grinding of a workpiece (1) in accordance with claim 1, wherein the workpiece (1) is released from its clamped state after the second extraction, is displaced and clamped once again, and at least the steps b) to f) are repeated.

Description

[0036] The figures in the illustrations show in detail:

[0037] FIG. 1 a side view of the grinding tool and the workpiece while contact is made in a first entry region,

[0038] FIG. 2 a side view of the grinding tool and the workpiece in the course of the first extraction,

[0039] FIG. 3 a side view of the grinding tool and the workpiece while contact is made in a second entry region,

[0040] FIG. 4 a side view of the grinding tool and the workpiece in the course of the second extraction,

[0041] FIG. 5 a side view of the workpiece as a temporary workpiece.

[0042] FIG. 1 shows a side view of the grinding tool 2 and the workpiece 1 while contact is being made with a first entry region 6, wherein the entry region 6 extends along a first vertical outer surface 12 and a horizontal outer surface 13 of the workpiece 1. Contact is thus defined as the moment at which the grinding tool 2 and the workpiece 1 initially touch. In this context, initially means a first and each further contact, after which the grinding tool 2 and workpiece 1 were spaced apart from each other. For the sake of clarity, the grinding tool 2 is only partially shown in the figures, and has an essentially cylindrical shape that extends along the axis of rotation 3. The side view shown is oriented parallel to the feed plane 4, and at right-angles to the axis of rotation 3 of the grinding tool 2. In the course of the contact with the first entry region 6, the grinding tool 2 moves at a second velocity v.sub.2, which in this example of embodiment is linear, and has a horizontal and a vertical directional component. The second velocity v.sub.2 is generated by way of a movement of the axis of rotation 3 in the feed plane 4, as a result of which it is transferred in an appropriately parallel manner to a vertically lowest point of the grinding tool 2. A contact point between the vertically lowest point of the grinding tool 2 and the workpiece 1 also lies within the entry region 6. Before the grinding tool 2 establishes contact with the workpiece 1, the grinding tool 2 is moved at a first velocity v.sub.1 into a machining region 5 surrounding the workpiece 1.

[0043] FIG. 2 shows a side view of the grinding tool 2 and the workpiece 1 in the course of the first extraction, whereby a first exit region 8 is positioned along a second vertical outer surface 14 of the workpiece 1, and is defined by a final point of contact between the grinding tool 2 and the workpiece 1 before they move apart from each other. As a result of the preceding traverse of the grinding tool 2 through the workpiece 1 along a contour 7, this contour 7 is transferred to the workpiece 1, and a new outer contour surface 17, defined by the contour 7, is formed. In this example of embodiment, the contour 7, and therefore the newly formed outer contour surface 17, have a linear shape. The hatched region of the workpiece 1 was removed by the first traverse of the grinding tool 2, and is no longer part of the workpiece 1. The first extraction also takes place at the second velocity v.sub.2 of the grinding tool 2.

[0044] FIG. 3 shows a side view of the grinding tool 2 and the workpiece 1 while the grinding tool 2 establishes contact with a second entry region 9 of the workpiece 1, whereby the second entry region 9 in this example of embodiment is positioned in registry with the first exit region 8 on the second vertical outer surface 14 of the workpiece 1. However, the grinding tool 2 establishes contact with the workpiece 1 at a third velocity v.sub.3. The grinding tool 2 moves at the third velocity v.sub.3 along a horizontal traverse direction 10 through the workpiece 1.

[0045] FIG. 4 shows a side view of the grinding tool 2 and the workpiece 1 in the course of the second extraction, whereby the grinding tool 2 is moved at a third velocity v.sub.3. The grinding tool 2 exits the workpiece 1 from the second exit region 11. The second traverse of the grinding tool 2 along the direction of traverse 10 grinds the workpiece 1 to its final dimensions. In the course of the movement at the third velocity v.sub.3, the grinding tool 2 has reached its total vertical engagement setting z, at least in the course of the second traverse. The angle (p is formed between the horizontal direction of traverse 10 and the contour 7, whereby this is dependent in particular on the position of the contact between the grinding tool 2 and the workpiece 1 in the entry region 6, the total vertical engagement setting z, and a workpiece width b of the workpiece 1.

[0046] FIG. 5 shows a side view of the workpiece 1 as a temporary workpiece 15, which is formed from a plurality of bandsaw blades 16 that are parallel to each other. The grinding tool 2 is shown with dotted lines in an exemplary manner in possible positions in the course of the inventive method. The direction vectors of the second and third velocities v.sub.2, v.sub.3 are also shown, which also subtend the angle (p between them.

LIST OF REFERENCE SYMBOLS

[0047] 1 Workpiece [0048] 2 Grinding tool [0049] 3 Axis of rotation [0050] 4 Feed plane [0051] 5 Machining region [0052] 6 First entry region [0053] 7 Contour [0054] 8 First exit region [0055] 9 Second entry region [0056] 10 Horizontal direction of traverse [0057] 11 Second exit region [0058] 12 First vertical outer surface [0059] 13 Horizontal outer surface [0060] 14 Second vertical outer surface [0061] 15 Temporary workpiece [0062] 16 Bandsaw blade [0063] 17 Contour outer surface [0064] v.sub.1 First velocity [0065] v.sub.2 Second velocity [0066] v.sub.3 Third velocity [0067] b Workpiece width [0068] z Total vertical engagement setting [0069] Angle