A combined chamfering device

Abstract

The present invention relates to a spliced ​​chamfering device, comprising a base and a plurality of thin tooth plates; all of the thin tooth plates are fixedly spliced ​​on the side wall of the lower part of the base to form a conical chamfering body, and the lower parts of all of the thin tooth plates extend to the bottom of the base, and the lower parts of all of the thin tooth plates are pressed against each other on the side close to the base, and a drainage groove connecting the water hole inside the base is formed between two adjacent thin tooth plates. The beneficial effects of the present invention are as follows: the chamfering device is spliced ​​by a plurality of thin tooth plates, and a drainage groove is formed between each two adjacent thin tooth plates, so that the working surface of the chamfering device is densely distributed with drainage grooves, and the cooling water discharged outward from the drainage groove can cover the entire working surface, thereby improving the working efficiency and extending the service life of the chamfering device; at the same time, the deformation rates of the radial points are relatively close, the deformation problem is alleviated, and the service life of the chamfering device is extended.

Description

Technical Field

[0001] The invention relates to the field of abrasive tool processing tools, and in particular to a split-type chamfering device. Background Art

[0002] like Figure 1 As shown, the existing chamfering device (chamfering grinding head or chamfering sleeve that can be used with a drill bit) is a conical integrated structure, and a plurality of drainage grooves 4 are provided on the conical surface of the chamfering device. A drainage hole 15 is provided in the drainage groove 4 to communicate with the inside of the chamfering device and drain water outward. During the chamfering process, cold water is discharged outward through the drainage hole 15 to achieve the cooling effect. Among them, the axial height position of the drainage hole 15 is different to drain water in different directions. The chamfering device with the above integrated structure has the following defects:

[0003] (1) The drainage holes 15 cannot be distributed all over the conical surface of the chamfering device, so the cold water discharged from the drainage holes 15 cannot completely cover the working surface of the chamfering device, resulting in incomplete cooling;

[0004] (2) Due to the different axial height positions of the drainage holes 15, when the processing surface is just between the upper and lower drainage holes 15, the cold water discharged from the drainage holes 15 cannot reach the processing surface for cooling;

[0005] (3) During the processing, the processing amount of the chamfering device at different positions in the axial direction is different, such as Figure 2 As shown in the figure, the processing amount at a on the chamfering device is greater than the processing amount at b, so the wear amount at a on the chamfering device is greater than the wear amount at b, that is, the longer the grinding distance H on the chamfering device, the greater the wear, so the wear at different positions cannot be synchronized (amount), which eventually causes the chamfering device to be deformed ( Figure 2 dotted line).

[0006] (4) The circumference of the chamfering device at each radial point on the working surface increases as the diameter increases, that is, the wear resistance and deformation resistance increase as the diameter increases, but the processing amount of the circumference at each radial point increases as the diameter decreases, that is, the wear amount increases as the diameter decreases, and the smaller the diameter, the easier it is to deform. Summary of the invention

[0007] In summary, in order to overcome the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a combined chamfering device.

[0008] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a spliced ​​chamfering device, comprising a base and a plurality of thin tooth plates; all of the thin tooth plates are fixedly spliced ​​on the side wall of the lower part of the base to form a conical chamfered body, and the lower parts of all of the thin tooth plates extend to the bottom of the base, and the lower parts of all of the thin tooth plates are pressed against each other on the side close to the base, and a drainage groove connected to the water hole inside the base is formed between two adjacent thin tooth plates.

[0009] The beneficial effects of the present invention are as follows: the chamfering device is formed by splicing a number of thin tooth pieces, and drainage grooves are formed between each two adjacent thin tooth pieces, so that the working surface of the chamfering device is densely distributed with drainage grooves, and the cooling water discharged outward from the drainage grooves can cover the entire working surface, thereby improving the working efficiency and extending the service life of the chamfering device. At the same time, the circumferential thickness of the thin tooth pieces at each radial point on the working surface is consistent, and the cumulative arc length of the circumference is equal, that is, the wear resistance and deformation resistance are consistent; although the processing amount and wear amount of the circumference of each radial point on the working surface increase as the diameter decreases, compared with the chamfering device of the prior art, the deformation rates of the radial points tend to be close, the deformation problem is alleviated, and the service life of the chamfering device is extended.

[0010] On the basis of the above technical solution, the present invention can also be improved as follows:

[0011] Furthermore, a plug hole for plugging into the upper side of the thin tooth plate is provided on the side wall of the base, and a water supply groove for connecting the water hole with the drainage groove is provided on the side wall of the base corresponding to the lower side of the plug hole.

[0012] The beneficial effect of adopting the above further solution is: the water hole is connected with the drainage groove.

[0013] Furthermore, a clamping block is provided on one side of the middle part of the thin tooth plate, and a clamping groove is provided on the side wall of the base at a position corresponding to the clamping block; a nut is threadedly mounted on the base and at a position corresponding to the top of the thin tooth plate, and the nut presses the upper end of the thin tooth plate downward to fix the thin tooth plate at a corresponding position on the base.

[0014] The beneficial effect of adopting the above further solution is that it is easy to assemble and position the clamping block, so as to fix the thin tooth piece on the base.

[0015] Furthermore, a drainage channel is provided at the lower part of the thin tooth plate, which is connected to the water hole and discharges water to the outside.

[0016] The beneficial effect of adopting the above further solution is: ensuring drainage at the bottom of the thin tooth plate.

[0017] Furthermore, the drainage channel is a semicircular hole, which is provided in multiple forms and is arranged horizontally in the upper and lower axial directions at the bottom of the thin tooth plate.

[0018] The beneficial effect of adopting the above further solution is that it can ensure that the lower part of the thin tooth plate has drainage, and can prevent the thin tooth plate from being too thin and losing strength.

[0019] Furthermore, it also includes a water blocking mechanism for axially blocking the cold water in the water hole so that the cold water in the water hole is radially discharged to the drainage groove after passing through the water supply groove. The water blocking mechanism is installed on the base.

[0020] Furthermore, the water-blocking mechanism includes an axis and a blocking cover; the upper end of the axis is fixed inside the water hole, and the lower end thereof extends out of the water hole, and a gap is provided between the axis and the inner wall of the water hole; the blocking cover is fixed to the lower end of the axis and adheres to the thin tooth plate to axially block the cold water in the water hole.

[0021] The beneficial effect of adopting the above further solution is that the cold water can be discharged radially to cool the working surface.

[0022] Furthermore, it also includes a joint; one end of the joint is connected to the machine tool spindle, and the other end is connected to the end of the base away from the thin tooth plate, and a water supply hole is provided inside the joint to connect the external water source with the water hole.

[0023] The beneficial effect of adopting the above further solution is: achieving the connection between the chamfering device and the main shaft of the machine tool.

[0024] Furthermore, the upper end of the axis extends to the inside of the water supply hole, a screw hole is horizontally provided in the joint corresponding to the position of the upper end of the axis, and a screw is provided in the screw hole to squeeze the upper end of the axis to fix the axis.

[0025] The beneficial effect of adopting the above further solution is: the axis is fixed so that it exerts an upward pressure on the thin tooth plate.

[0026] Furthermore, the position of the upper end of the axis corresponding to the screw is a planar structure.

[0027] The beneficial effect of adopting the above further solution is: improving the extrusion effect of the screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A three-dimensional diagram of an existing chamfering grinding head;

[0029] Figure 2 The figure is a schematic diagram of the wear of the existing chamfering grinding head (the dotted arc line represents the shape of the chamfering grinding head after wear);

[0030] Figure 3 It is an overall three-dimensional diagram of the first embodiment of the present invention;

[0031] Figure 4 This is an exploded view of the first embodiment of the present invention (retaining a thin tooth piece);

[0032] Figure 5 is a cross-sectional view of the first embodiment of the present invention (the arrow indicates the flow direction of the cold water);

[0033] Figure 6 for Figure 5 A magnified view of (the straight thick dashed line indicates the shape of the thin tooth after wear);

[0034] Figure 7 is a cross-sectional view of a substrate of Embodiment 1;

[0035] Figure 8 A three-dimensional diagram of a thin tooth piece inserted into a base body of the first embodiment;

[0036] Fig. 9 This is a three-dimensional diagram of the first embodiment of the present invention, in which only two thin teeth are left after removing the axle and other components;

[0037] Fig.10 for Fig. 9 B enlarged view;

[0038] Fig.11 This is a three-dimensional diagram of the second embodiment of the present invention (excluding the clamping ring);

[0039] Fig.12 for Fig.11 C enlarged view;

[0040] Fig.13 for Fig.11 A cross-sectional view of

[0041] Fig.14 It is an exploded view of the second embodiment of the present invention (a thin tooth piece is retained).

[0042] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0043] 1. Base, 2. Thin tooth plate, 3. Water hole, 4. Drainage groove, 5. Buckle, 6. Water supply groove, 7. Block, 8. Slot, 9. Drainage channel, 10. Axis, 11. Nut, 12. Joint, 13. Water supply hole, 14. Screw hole, 15. Drainage hole, 17. Diamond, 18. Cover plate, 19. Aluminum pad, 20. Clamping ring, 21. Spare water tank. DETAILED DESCRIPTION

[0044] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0045] Embodiment 1

[0046] like Figure 3-5As shown, a spliced ​​chamfering grinding head includes a base 1 and a plurality of thin tooth plates 2, wherein the thin tooth plates 2 are provided with processing abrasive diamond particles 17. All of the thin tooth plates 2 are fixedly spliced ​​on the side wall of the lower part of the base 1 to form a conical chamfering body, and the lower parts of all of the thin tooth plates 2 extend to the bottom of the base 1, and the lower parts of all of the thin tooth plates 2 are close to the side of the base 1 and abut against each other, and a drainage groove 4 is formed between two adjacent thin tooth plates 2 to connect to the water hole 3 inside the base 1. The chamfering grinding head is formed by splicing a plurality of thin tooth plates 2, and a drainage groove 4 is formed between each two adjacent thin tooth plates 2, so that the working surface of the chamfering grinding head is densely distributed with drainage grooves 4, and the cooling water discharged outward from the drainage grooves 4 can completely cover the working surface, thereby improving the working efficiency and extending the service life of the chamfering grinding head. At the same time, the deformation rates of the radial points are relatively close, the deformation problem is alleviated, and the life of the chamfering device is extended. The specific reasons are as follows:

[0047] The present invention adopts a thin tooth piece 2 splicing structure: the processing amount A of the circumference of a certain radial point on the working surface = the circumference L of the point * the axial processing distance H of the point. For the same chamfering device, the larger the radial diameter, the larger the circumference L, but the smaller H. The cumulative arc length of the thin-piece teeth 2 on the circumference of each radial point of the working surface abrasive entity is B, and is approximately equal everywhere (approximately equal means that the difference is that at different radial points, the curvature of the arc is different, and the arc length is slightly different). Figure 2 In the figure, the cumulative arc length of the thin toothed plate 2 on the circumference of point a is B1, and the cumulative arc length of the thin toothed plate 2 on the circumference of point b is B2, where B1 = B2. Therefore, B = n*l, (n-number of thin-plate teeth, l-circumferential arc length of thin-plate teeth), and the abrasive entity has little correlation with the diameter change of each point.

[0048] The existing integrated chamfering device: the machining amount A of a certain point on the radial direction of the working surface = the circumference L of the point * the axial machining distance H of the point. The circumference L of each radial point of the working surface abrasive entity is in direct proportion to the diameter. Figure 2 In the figure, the circumference L at point a is B1, and the circumference L at point b is B2, where B1>B2 (the diameter at point a is greater than the diameter at point b). Therefore, B=L, and the abrasive entity is closely related to the diameter change at each point.

[0049] The processing amount at the large end of the chamfering device is smaller than that at the small end. Therefore, the deformation rate of the large end is smaller than that of the small end. In summary, compared with the prior art, the present invention reduces the abrasive entity at the large end, thereby increasing the deformation rate of the large end and making it close to the deformation rate of the small end, that is, the deformation problem of the chamfering device is alleviated, thereby extending the life of the chamfering device. In addition, since the circumferential thickness of the thin tooth plate 2 at each radial point on the working surface is consistent and the cumulative arc length of the circumference is equal, its wear resistance and anti-deformation ability are consistent.

[0050] like Figure 7 and 8 As shown, a plug hole 5 for inserting the upper side of the thin tooth piece 2 is provided on the side wall of the base 1, and a water supply groove 6 for connecting the water hole 3 with the drainage groove 4 is provided on the side wall of the base 1 corresponding to the plug hole 5. A clamping block 7 is provided on one side of the middle part of the thin tooth piece 2, and a clamping groove 8 is provided on the side wall of the base 1 at a position corresponding to the clamping block 7. A nut 11 is threadedly mounted on the base 1 and corresponding to the position above the thin tooth piece 2, and the nut 11 presses the upper end of the thin tooth piece 2 downward to fix the thin tooth piece 2 at the corresponding position of the base 1. The upper side of the thin tooth piece 2 is inserted into the plug hole 5 of the base 1 to realize the radial positioning of the thin tooth piece 2. Since the clamping block 7 of the thin tooth piece 2 is engaged in the clamping groove 8, the nut 11 is rotated to press the upper end of the thin tooth piece 2 downward, thereby realizing the axial positioning of the thin tooth piece 2. In the above manner, the thin tooth piece 2 can be quickly fixed and spliced ​​on the base 1, and the positioning is reliable.

[0051] like Fig. 9 and 10 As shown, the lower part of the thin tooth plate 2 is provided with a drainage channel 9 that is connected to the water hole 3 and drains water to the outside. The drainage channel 9 ensures that the lower part of the thin tooth plate 2 can be drained even if it is against each other, thereby ensuring the cooling effect. Preferably, the drainage channel 9 is a semicircular hole, which is provided with a plurality of holes and arranged horizontally in the upper and lower axial directions at the lower part of the thin tooth plate 2. The semicircular hole drainage channel 9 can not only ensure that the lower part of the thin tooth plate 2 can be drained, but also prevent the thin tooth plate 2 from being too thin and losing strength.

[0052] The chamfering grinding head also includes a water-blocking mechanism for axially blocking the cold water in the water hole 3, so that the cold water in the water hole 3 is radially discharged to the drainage groove 4 after passing through the water supply groove 6, and the water-blocking mechanism is installed on the base 1. The limiting mechanism includes an axis 10 and a blocking cover. The upper end of the axis 10 is fixed inside the water hole 3, and the lower end thereof extends out of the water hole 3, and a gap is provided between the axis 10 and the inner wall of the water hole 3; the blocking cover is fixed to the lower end of the axis 10 and abuts against the thin tooth plate 2 to axially block the cold water in the water hole 3. The upper end of the axis 10 extends to the inside of the water supply hole 13, and a screw hole 14 is horizontally provided in the joint 12 at a position corresponding to the upper end of the axis, and a screw is provided in the screw hole to squeeze the upper end of the axis 10 to fix the axis 10. The position of the upper end of the axis 10 corresponding to the screw is a planar structure. One end of the joint 12 is connected to the main shaft of the machine tool, and the other end thereof is connected to the end of the base 1 away from the thin tooth plate 2. A water supply hole 13 for connecting the external water source with the water through hole 3 is provided inside the joint 12. The external water source first enters the water supply hole 13 and then enters the water through hole 3. A part of the cold water in the water through hole 3 will be discharged outward through the water supply groove 6 and the drainage groove 4 to cool the working surface, and another part of the cold water will be discharged outward through the drainage channel 9 to cool the working surface, so that the cooling area can cover the entire working surface and ensure the cooling effect.

[0053] Embodiment 2

[0054] The thin tooth piece 2 split structure in the first embodiment can also be applied to the chamfering sleeve that can be used in conjunction with the drill bit, such as Figure 11-14 As shown, the thin tooth piece 2 is also fixedly spliced ​​on the side wall of the lower part of the base 1 through the cover plate 18 and the aluminum pad 19 to form a conical chamfered body. The base 1 is connected to the main shaft of the corresponding machine tool through the clamping ring 20, and a drainage groove 4 connected to the water hole 3 inside the base 1 is formed between two adjacent thin tooth pieces 2. The lower part of the thin tooth piece 2 is provided with a drainage channel 9 connected to the water hole 3 and draining water to the outside. Through the above structure, the chamfering sleeve can also form a drainage groove 4 and a drainage channel 9 between each two adjacent thin tooth pieces 2, so that the working surface of the chamfering sleeve is densely distributed with drainage grooves 4 and drainage channels 9. The cooling water discharged from the drainage grooves 4 and drainage channels 9 can cover the entire working surface, which also has the advantages of improving work efficiency and extending the service life of the chamfering sleeve. In addition, a water tank 21 is opened at the lower part of the base 1. The function of the spare water tank 21 is that after the thin tooth piece 2 is worn to a certain extent (when the spare water tank 21 is exposed), the adjacent thin tooth pieces 2 can still pass water normally after passing through the spare water tank 21.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A combined chamfering device, characterized in that: It comprises a base (1) and a plurality of thin tooth plates (2); all the thin tooth plates (2) are fixedly spliced ​​on the side wall of the lower part of the base (1) to form a conical chamfered body, and the lower parts of all the thin tooth plates (2) extend below the base (1); the lower parts of all the thin tooth plates (2) are close to the base (1) and abut against each other, and a drainage groove (4) is formed between two adjacent thin tooth plates (2) to communicate with the water hole (3) inside the base (1); The lower part of the thin tooth plate (2) is provided with a drainage channel (9) which is connected to the water hole (3) and discharges water to the outside; The side wall of the base body (1) is provided with an insertion hole (5) for plugging into the upper side of the thin tooth plate (2); and a water supply groove (6) for connecting the water hole (3) with the drainage groove (4) is provided on the side wall of the base body (1) below the insertion hole (5); A clamping block (7) is provided on one side of the middle of the thin tooth plate (2), and a clamping groove (8) is provided on the side wall of the base (1) at a position corresponding to the clamping block (7); a nut (11) is threadedly sleeved on the base (1) at a position corresponding to the top of the thin tooth plate (2), and the nut (11) presses the upper end of the thin tooth plate (2) downward to fix the thin tooth plate (2) at a corresponding position on the base (1); The drainage channel (9) is a semicircular hole, of which a plurality are provided and are arranged horizontally in the upper and lower axial directions at the bottom of the thin tooth plate (2).

2. The combined chamfering device according to claim 1, characterized in that: It also includes a water retaining mechanism for axially blocking the cold water in the water through hole (3), thereby allowing the cold water in the water through hole (3) to be radially discharged to the drainage groove (4) after passing through the water supply groove (6); the water retaining mechanism is mounted on the base (1).

3. The combined chamfering device according to claim 2, characterized in that: The water blocking mechanism comprises an axis (10) and a blocking cover; the upper end of the axis (10) is fixed inside the water hole (3), and the lower end thereof extends outside the water hole (3), and a gap is provided between the axis (10) and the inner wall of the water hole (3); the blocking cover is fixed to the lower end of the axis (10) and abuts against the thin tooth plate (2) to block the cold water in the water hole (3) axially.

4. The combined chamfering device according to claim 3, characterized in that: It also comprises a joint (12); one end of the joint (12) is connected to a machine tool spindle, and the other end is connected to an end of the base (1) away from the thin tooth plate (2); a water supply hole (13) is provided inside the joint (12) for connecting an external water source with the water through hole (3).

5. The combined chamfering device according to claim 4, characterized in that: The upper end of the shaft (10) extends into the interior of the water supply hole (13), a screw hole (14) is horizontally provided in the joint (12) at a position corresponding to the upper end of the shaft (10), and a screw is provided in the screw hole (14) for squeezing the upper end of the shaft (10) to fix the shaft (10).

6. The combined chamfering device according to claim 5, characterized in that: The position of the upper end of the axis (10) corresponding to the screw is a planar structure.

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