Turning tool interface of turning and milling center main shaft

Abstract

A turning tool connector of a turning center spindle is characterized in that a key and a key groove are respectively arranged on a turning tool handle and an end cover of a milling spindle, one side of the key, which does not bear cutting force, is made into an inclined plane with an inclination angle B, one side of the key groove, which does not bear the cutting force, is provided with a guide groove with a large inside and a small outside, a wedge-shaped sliding block slides in the guide groove, and a spring pushes the wedge-shaped sliding block outwards; a limiting screw prevents the wedge-shaped sliding block from being disengaged, and the wedge-shaped sliding block is also provided with an inclined face with the inclination angle being B. When the turning tool handle is inserted into the main shaft, the inclined plane of the key is contacted with the inclined plane of the wedge-shaped sliding block, the spring is compressed, the elastic force of the spring is amplified by the inclined plane of the wedge-shaped sliding block to become the counter-acting force pressed to the inclined plane of the key, the counter-acting force pushes the key and eliminates the gap between the key and the key groove, the main shaft tensions the tool handle in the state, and it is ensured that the tool is installed every time. The coordinates of the tool nose of the turning tool are not changed, the machining precision is improved, an expensive main shaft with three fluted discs for hydraulic locking is not needed, and the cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of metal cutting machine tools, in particular to a main shaft of a turning and milling center and a clamping and positioning method of a tool used therefor. Background Art

[0002] The existing turning and milling center spindle needs to be able to install rotating tools for milling and drilling, and also to install turning tools for turning. In order to simplify the structure by using the same tool holder and the same tool change mechanism, a three-toothed disc clutch and a hydraulic structure are often added to the spindle to lock the spindle when the turning tool is installed, such as patent WO2016 / 037111 A1. According to the patent, when the three-toothed disc hydraulic lock is turned on, the rigidity and positioning accuracy of the spindle are unquestionable. However, there is a loophole in the patent, that is, there is a large gap between the keyway of the HSK tool holder and the key of the spindle. This gap is required by the tool change system. According to the German DIN69863 standard, for the HSK-B63 tool holder, the maximum allowable gap is 0.13mm. This gap will cause the coordinates of the turning tool tip to be inconsistent each time the tool is installed. In addition, when the turning tool is subjected to cutting force, the tool tip will move, which leads to a decrease in turning accuracy. Patent CN204711245 U proposes to fix a flat key on the spindle end cover and set a keyway on one side of the turning tool handle. When the turning tool handle is installed on the spindle, the flat key of the spindle end cover is inserted into the keyway of the handle, which plays the role of positioning the turning tool handle and bearing the cutting force, and avoids the complication of the spindle. However, there is also a gap between the key and the keyway of the patent, which will also cause the coordinates of the turning tool tip to be inconsistent each time the tool is installed. In addition, when the turning tool is subjected to cutting force, the tool tip will move, which leads to a decrease in turning accuracy. Summary of the invention

[0003] The main purpose of the present invention is to solve the problem that the turning accuracy is reduced due to the gap between the key of the turning tool handle and the keyway of the spindle end cover.

[0004] In order to achieve the above object, the present invention designs the following technical solutions:

[0005] The tool interface of the turning and milling center spindle includes a tool seat, which is fixed on the tool handle. A key is set on the plane of the tool seat facing the spindle. A boss is set on the end cover of the milling spindle at a position opposite to the key. A keyway is made in the middle of the boss. The two sides of the keyway, the C surface and the D surface, are parallel to each other and perpendicular to the spindle end cover. The D surface of the keyway corresponds to the A surface of the key. Transfer cutting forceThe A surface of the key is parallel to the axis of the tool handle, and the B surface of the key is an inclined surface. The angle between the A surface and the B surface is B, which is smaller than the friction angle of the key and the keyway material; the C surface of the keyway is formed with a guide groove that is larger inside and smaller outside, and a wedge-shaped slider is in line with the guide groove and can slide in it. The back of the wedge-shaped slider is formed with a blind hole, and a spring is provided in the blind hole to push the wedge-shaped slider outward. The side of the wedge-shaped slider has a limit groove, and a limit screw limits the internal and external stroke of the wedge-shaped slider. The outside of the wedge-shaped slider is formed with an inclined surface, and the inclination angle of the inclined surface is B. When the tool handle is inserted into the spindle, the B surface of the key contacts the inclined surface of the wedge-shaped slider and compresses the wedge-shaped slider. The elastic force of the compressed spring is amplified by the inclined surface of the wedge-shaped slider to form a reaction force on the B surface of the key. The reaction force pushes the key to make the A surface of the key fit with the D surface of the keyway, and keep it in this state to achieve the complete tightening of the spindle to the tool handle. The gap between the key and the keyway is effectively eliminated, ensuring the tool installation accuracy and the ability to resist turning impact. Even if the turning tool is impacted by reverse torque, the wedge-shaped slider will self-lock and will not move and generate gap because the angle B is smaller than the friction angle of the key and keyway materials.

[0006] In the present invention, the key can be set on one side of the tool handle or on one side of the spindle end cover. In addition, the wedge-shaped slider can be set on the key or in the keyway. Considering that no inclined surface or wedge-shaped slider should be set on a pair of corresponding surfaces for transmitting cutting force, the present invention has a total of four schemes that can achieve the same purpose.

[0007] Alternative solution 1: the D surface is perpendicular to the spindle end cover, the C surface is an inclined surface, and the angle between it and the D surface is B. The D surface 5 corresponds to the A surface 8, and the B surface is parallel to the A surface and to the axis of the tool holder. A guide groove is formed on the B surface, and the wedge-shaped slider can slide in the guide groove. The wedge-shaped slider contains the spring to push the wedge-shaped slider outward, and the limit screw limits the inward and outward travel of the wedge-shaped slider. The inclined surface is formed on the outside of the wedge-shaped slider, and the inclination angle of the inclined surface is also B.

[0008] Alternative solution two, the key is arranged on the spindle end cover, the boss with the keyway is arranged on the tool seat, the A surface is perpendicular to the spindle end cover, the B surface and the A surface have an angle B, the A surface 8 corresponds to the D surface 5, the C surface is parallel to the D surface and to the axis of the tool holder, a guide groove is formed on the C surface, the wedge-shaped slider can slide in the guide groove, the wedge-shaped slider has the spring inside to push the wedge-shaped slider outward, the limit screw limits the inner and outer travel of the wedge-shaped slider, the wedge-shaped slider is provided with the inclined surface on the outside, and the inclination angle of the inclined surface is also.

[0009] Alternative solution three, the key is arranged on the spindle end cover, the boss with the keyway is arranged on the tool seat, the surface A is perpendicular to the spindle end cover, the surface B is parallel to the surface A, the surface D is parallel to the axis of the tool holder, the angle between the surface C and the surface D is B, the surface A 8 corresponds to the surface D 5, and the surface B is provided with a guide groove, the wedge-shaped slider can slide in the guide groove, the wedge-shaped slider has the spring inside to push the wedge-shaped slider outward, the limit screw limits the inward and outward travel of the wedge-shaped slider, and the outside of the wedge-shaped slider is provided with the inclined surface, and the inclination angle of the inclined surface is also B.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] Ensure that the coordinates of the tool tip remain unchanged each time the tool is installed, which can significantly improve the accuracy of turning processing;

[0012] There is no need to use expensive milling and turning spindles with three-toothed disc hydraulic locking mechanisms, which reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more specifically and intuitively illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0014] Figure 1 This is the axonometric view of the tool interface of the turning and milling center spindle;

[0015] Figure 2 Schematic diagram of the tool installation process for the turning tool interface of the turning and milling center spindle;

[0016] Figure 3 Schematic diagram of the first alternative solution for the tool interface of the spindle of the milling center.

[0017] Figure 4 Schematic diagram of the second alternative solution for the tool interface of the spindle of the milling center.

[0018] Figure 5 Schematic diagram of the third alternative solution for the tool interface of the spindle of the milling center.

[0019] Attached photos

[0020] 1 tool holder, 2 tool handle, 3 key, 4 spindle end cover, 5 D surface, 6 C surface, 7 keyway, 8 A surface, 9 B surface, 10 wedge-shaped slider, 11 spring, 12 limit groove, 13 limit screw, 15 inclined surface. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments.

[0022] Reference Figure 1 The tool interface of the turning center spindle includes a tool seat 1, which is fixed on a tool handle 2. A key 3 is arranged on the plane of the tool seat 2 facing the spindle. A boss is arranged on the end cover 4 of the milling spindle at a position facing the key 3. A keyway 7 is made in the middle of the boss. The two sides of the keyway, the C surface 6 and the D surface 5, are parallel to each other and perpendicular to the spindle end cover 4. The D surface 5 corresponds to the A surface 8. To transmit cutting force The A surface 8 of the key 3 is parallel to the axis of the tool handle, and the B surface 9 of the key 3 is an inclined surface. The angle between the A and B surfaces is B, and B is smaller than the friction angle of the key and the keyway material; a guide groove with a larger inner side and a smaller outer side is formed on the C surface 6 of the keyway, and a wedge-shaped slider 10 is consistent with the shape of the guide groove and can slide therein. A blind hole is formed on the inner surface of the wedge-shaped slider 10, and a spring 11 is provided in the blind hole to push the wedge-shaped slider 10 outward. A limiting groove 12 is provided on the side of the wedge-shaped slider 10, and a limiting screw 13 limits the inside and outside of the wedge-shaped slider 10. The wedge-shaped slider 10 is provided with an inclined surface 15 on the outside, and the inclination angle of the inclined surface is also B. When the tool handle 2 is inserted into the spindle, the second surface 9 of the key 3 contacts the inclined surface 15 of the wedge-shaped slider 10 and compresses the wedge-shaped slider 10. The elastic force of the compressed spring 11 is amplified by the inclined surface 15 of the wedge-shaped slider 10, forming a reaction force on the second surface 9 of the key 3. The reaction force pushes the key 3, so that the first surface 8 of the key 3 fits with the third surface 6 of the keyway, and maintains this state to achieve the complete tightening of the tool handle by the spindle. The gap between the key 3 and the keyway 7 is effectively eliminated, ensuring the tool installation accuracy and the ability to resist turning impact. Even if the turning tool is impacted by the reverse torque, since the angle B is smaller than the friction angle of the key and keyway materials, the wedge-shaped slider 10 will be self-locking and will not move and generate a gap.

[0023] Figure 2 The process of tool installation on the turning and milling center spindle is described.

[0024] A is when the tool handle begins to be inserted, and there is still a gap between the key and the keyway;

[0025] B is when the key of the tool handle begins to compress the wedge-shaped slider, and the inclined surface of the wedge-shaped slider begins to push the key downward; C is when the tool handle is about to be tightened, and the bottom of the key and the top of the keyway remain in contact.

[0026] Figure 3 to Figure 5 Three other variations of the present invention are described, all of which achieve the same purpose.

[0027] Figure 3 forAlternative solution 1, the D surface 5 is perpendicular to the spindle end cover 4, the C surface 6 is a slope, and the angle between it and the D surface 5 is B, the D surface 5 corresponds to the A surface 8 to transmit cutting force, the B surface 9 is parallel to the A surface 8 and to the axis of the tool holder, and a guide groove is formed on the B surface 9, and the wedge-shaped slider 10 can slide in the guide groove. The wedge-shaped slider 10 has the spring 11 inside to push the wedge-shaped slider 10 outward, and the limit screw 13 limits the internal and external strokes of the wedge-shaped slider 10. The outside of the wedge-shaped slider 10 is provided with the slope 15, and the inclination angle of the slope is also B.

[0028] Figure 4 for Alternative solution two, the key 3 is arranged on the spindle end cover 4, the boss with the keyway is arranged on the tool holder 1, the surface A 8 is perpendicular to the spindle end cover 4, the surface B 9 has an angle B with the surface A 8, the surface A 8 corresponds to the surface D 5 to transmit cutting force, the surface C 6 is parallel to the surface D 5 and to the axis of the tool holder, the surface C 6 is provided with a guide groove, the wedge-shaped slider 10 can slide in the guide groove, the wedge-shaped slider 10 has the spring 11 inside to push the wedge-shaped slider 10 outward, the limit screw 13 limits the internal and external travel of the wedge-shaped slider 10, the wedge-shaped slider 10 is provided with the inclined surface 15 on the outside, and the inclination angle of the inclined surface is also B.

[0029] Figure 5 for Alternative solution three, the key 3 is arranged on the spindle end cover 4, the boss with the keyway is arranged on the tool holder 1, the surface A 8 is perpendicular to the spindle end cover 4, the surface B 9 is parallel to the surface A 8, the surface D 5 is parallel to the axis of the tool holder, the angle between the surface C 6 and the surface D is B, the surface A 8 corresponds to the surface D 5 to transmit the cutting force, the surface B 9 is formed with a guide groove, the wedge-shaped slider 10 can slide in the guide groove, the wedge-shaped slider 10 has the spring 11 inside to push the wedge-shaped slider 10 outward, the limit screw 13 limits the internal and external strokes of the wedge-shaped slider 10, and the wedge-shaped slider 10 is formed with the inclined surface 15 on the outside, and the inclination angle of the inclined surface is also B.

Claims

1. A turning tool interface of a turning and milling center spindle, comprising a turning tool seat (1), wherein the turning tool seat (1) is fixed on a tool handle (2), Its special The sign is that A key (3) is arranged on the plane of the turning tool seat (1) facing the spindle, a boss is arranged on the end cover (4) of the milling spindle at a position facing the key (3), a keyway (7) is made in the middle of the boss, the C surface (6) and the D surface (5) of the keyway are parallel to each other and perpendicular to the spindle end cover (4), the D surface (5) of the keyway corresponds to the A surface (8) of the key (3), the A surface (8) of the key (3) is parallel to the axis of the tool holder, the B surface (9) of the key (3) is an inclined surface, the angle between the A surface and the B surface is B, and B is smaller than the friction angle of the key and keyway materials; A guide groove with a larger inner side and a smaller outer side is formed on the keyway C surface (6), and a wedge-shaped slider (10) is shaped to match the guide groove and can slide therein. A blind hole is formed on the inner surface of the wedge-shaped slider (10), and a spring (11) is provided in the blind hole to push the wedge-shaped slider (10) outward. The wedge-shaped slider (10) is formed with an inclined surface (15) on the outside, and the inclination angle of the inclined surface is also B. When the tool handle (2) is inserted into the spindle, the inclined surface-B surface (9) of the key (3) and the wedge-shaped slider (10) are aligned. ) contacts the inclined surface (15) of the key (3) and compresses the wedge-shaped slider (10). The elastic force of the compressed spring (11) is amplified by the inclined surface (15) of the wedge-shaped slider (10), forming a reaction force on the second surface (9) of the key (3). The reaction force pushes the key (3) so that the first surface (8) of the key (3) fits with the third surface (5) of the keyway and is maintained in this state to achieve complete tightening of the spindle on the tool holder, effectively eliminating the gap between the key (3) and the keyway (7).

2. The tool interface of the turning and milling center spindle according to claim 1 is characterized in that: A key (3) is arranged on the tool holder (1), a boss is arranged on the end cover (4) of the milling spindle, a keyway (7) is made in the middle of the boss, the D surface (5) is perpendicular to the spindle end cover (4), the C surface (6) is an inclined surface, and the angle between it and the D surface (5) is B, the D surface (5) corresponds to the A surface (8), the B surface (9) is parallel to the A surface (8) and parallel to the axis of the tool holder, and the B surface (9) is formed with a guide groove, in which the wedge-shaped slider (10) can slide, the wedge-shaped slider (10) has the spring (11) inside, and pushes the wedge-shaped slider (10) outward, and the wedge-shaped slider (10) is formed with the inclined surface (15) on the outside, and the inclination angle of the inclined surface is also B.

3. The tool interface of the turning and milling center spindle according to claim 1 is characterized in that: The key (3) is arranged on the spindle end cover (4), the boss with the keyway is arranged on the tool holder (1), the surface A (8) is perpendicular to the spindle end cover (4), the surface B (9) forms an angle B with the surface A (8), the surface A (8) corresponds to the surface D (5), the surface C (6) is parallel to the surface D (5) and to the axis of the tool holder, the surface C (6) is provided with a guide groove, the wedge-shaped slider (10) can slide therein, the wedge-shaped slider (10) has the spring (11) inside, pushing the wedge-shaped slider (10) outward, the wedge-shaped slider (10) is provided with the inclined surface (15) on the outside, and the inclination angle of the inclined surface is also B.

4. The turning tool interface of the turning and milling center spindle according to claim 1 is characterized in that: The key (3) is arranged on the spindle end cover (4), the boss with the keyway is arranged on the tool holder (1), the surface A (8) is perpendicular to the spindle end cover (4), the surface B (9) is parallel to the surface A (8), the surface D (5) is parallel to the axis of the tool holder, the angle between the surface C (6) and the surface D is B, the surface D (5) corresponds to the surface A (8), the surface B (9) is provided with a guide groove, the wedge-shaped slider (10) can slide therein, the wedge-shaped slider (10) has the spring (11) inside to push the wedge-shaped slider (10) outward, the wedge-shaped slider (10) is provided with the inclined surface (15) on the outside, and the inclination angle of the inclined surface is also B.

Images