TWI654412B - Adjusting device for emery wheel - Google Patents

Abstract

The invention is a calibration device for a grinding wheel, comprising a dial mounted on the grinding wheel, wherein a disc-shaped surface of the dial has an annular groove, the annular groove has an annular outer wall An annular inner wall and a bottom, the annular outer wall and the bottom are at an angle of less than 90 degrees, such that the annular outer wall is a concave bevel; three balance blocks, each disposed in the annular groove and mutually Each of the balance blocks has a first and a second recess, and the first and second recesses are respectively disposed on two adjacent surfaces of the balance block; at least three steel balls, The number of the at least three steel balls is equal to or multiplied by the number of the three balance blocks, and is installed in the second groove; and three stop screws are installed in the first groove to push the steel ball To the topping position, the steel ball is placed against the concave slope to fix the weight in the dial.

Description

Grinding wheel correction device

The invention relates to a correction device for a grinding wheel, in particular to a correction device for fixing a weight by using a concave slope on a dial.

When the grinder for the micro-drill of a printed circuit board is used for a period of time, it will result in double grinding wheels on the grinding table (including the right grinding wheel that grinds the 75° angle of the knife back and the rear grinding wheel). The dynamic balance center of the left grinding wheel of the 65° angled blade is displaced, so that the grinding wheel that causes high-speed operation will be unbalanced. At this point, a balance instrument must be used to correct the position to detect the unbalanced position, and then the grinding wheel can be drilled or a balance screw can be added to maintain the balance center of the grinding wheel at the motor. The axis position of the shaft.

Referring to the first figure, a fixing device for adjusting the balance is shown, which is a taper disc 10 having an annular groove 11 and then distributed in an annular groove by three balance blocks 12 in an equilateral triangle manner. 11 (the other two are not shown in the figure), the weight 12 has a screw hole 13 and a radial hole 14 , and a screw 15 is arranged in the screw hole 13 for pushing the hole 14 A steel ball 16, which is then used to abut against a groove bottom surface 17 of the top taper disk 10, which is clamped together with a pressure plate 18 by a single grinding wheel 19 (which is not used for the grinding of the micro-drill). Although the use of the steel ball 16 to abut the bottom surface 17 of the top groove can achieve the function of fixing the weight 12, but due to the concave The groove bottom surface 17 is parallel to the axial direction AD of the power rod rotating shaft 191, so that there is no geometrical effect of preventing the balance block 12 from coming loose.

Please refer to the second figure, which is the dynamic balance mode of Taiwan Patent Publication No. 303756 "Improved Structure of Grinding Wheel Fixing Device", showing a disk cover 20 (corresponding to the position of the platen 18 in the first figure, but The pressure plate 18 is larger and thicker. A ring groove 21 is formed thereon, which has an inner tapered surface 211, and is pressed against the inner inclined surface 25 of the top three weights 24 by the pressing tapered surface 23 of a disk-shaped hollow pressure plate 22. In order to prevent the balance block 24 from coming off, the taper disc 10 is clamped together with the rim cover 20 to the single grinding wheel 26. However, the patent is designed in such a way that the weights 24 can be easily removed for cleaning, so as to solve the problem that the weight 12 in the first figure will be stuck by the grinding debris and cannot move, and the steel ball 16 is fixed. The mode of 12 is changed as in the second figure, the weighting of the disk-shaped pressure plate 22 is the same as that of the weight block 22, so that the structure of the ring groove 21 is complicated, and the inner side inclined surface 25 of the ring groove 21 and the weight block 24 after installation is There is still a considerable gap between them.

For the sake of the job, how to solve the problem that the grinding wheel used for micro-drill grinding should be drilled or supplemented with a balancing screw. After the inventors devoted themselves to experiments, tests and research, finally obtained a grinding wheel. The calibration device not only effectively eliminates the problem of drilling or replenishing the grinding wheel, but also has the effect of conveniently adjusting the position of the balance block. That is, the problem to be solved by the present invention is how to overcome the problem of directly processing the grinding wheel, so that the movement of the balance block is more convenient, and how to overcome the problem that the balance block on the dial needs to be flexibly moved, and How to overcome the problem that the moving angle required for the balance block to move to a new equilibrium position is not easy to align.

The invention discloses a calibration device for a grinding wheel, comprising a dial mounted on the grinding wheel, a disc-shaped surface of the dial having an annular groove, the annular groove having an annular outer wall, An annular inner wall and a bottom, the annular outer wall and the bottom are at an angle of less than 90 degrees, such that the annular outer wall is a concave slope; three balance blocks, each disposed in the annular groove and spaced apart from each other a predetermined angle, each of the balance blocks has a first and a second groove, and the first and the second grooves are respectively disposed on two adjacent surfaces of the balance block; at least three steel balls, the At least three steel balls are equal to or in multiples of the number of the three balance blocks, and are installed in the second groove; and three stop screws are installed in the first groove to push the steel ball to In an abutting position, the steel ball is placed against the concave slope to fix the weight in the dial.

According to a main technical point of view, the present invention also discloses a dynamic balancing device for a grinder, wherein the grinder has a grinding wheel, and the correcting device comprises an adapter plate mounted on the grinding wheel. And having an annular groove, wherein the annular groove has an opening side, a groove surface and a groove bottom side, and a first height of the opening side is smaller than a second height of the bottom side of the groove; a balance block disposed in the annular groove; three fasteners for respectively engaging the three balance blocks on the surface of the groove; and three pressing members for respectively operating the three fasteners, wherein each The pressing members are operated such that each of the fasteners completes the locking of the weights on the surface of the recess.

The present invention also discloses a dynamic balancing device for a grinder, wherein the grinder has a grinding wheel, and the correcting device comprises an adapter plate mounted on the grinding wheel, and The utility model has an annular groove, wherein the annular groove has an opening side, a groove surface and a groove bottom side, and the opening side a first height is less than a second height of the bottom side of the groove; a weight is disposed in the annular groove; and a fastening device is used to fasten the weight to the surface of the groove.

The present invention may also be a dynamic balance correction method for a grinding wheel, comprising providing an adapter disk mounted on a grinding wheel, the adapter disk having an annular groove and an annular outer wall of the annular groove a plurality of balance blocks are disposed on the adapter plate, each of the balance blocks has an axial direction and a radial groove; a plurality of screws are disposed in each of the axial grooves; and a plurality of metals are disposed Balls are formed in each of the radial grooves; and each of the screws is pressed to abut the metal ball to an abutting position, and the metal ball is abutted against the concave bevel to fix the balance block In the adapter.

10‧‧‧Tear disk

11‧‧‧Ring setting slot

12‧‧‧balance block

13‧‧‧ screw holes

14‧‧‧Perforation

15‧‧‧ screws

16‧‧‧ steel balls

17‧‧‧Face bottom

18‧‧‧ pressure plate

19‧‧‧Single wheel

191‧‧‧Power rod shaft

AD‧‧‧ axial

20‧‧‧Edge plate cover

21‧‧‧ Ring groove

211‧‧‧Inner cone

22‧‧‧Press

23‧‧‧Resist the cone

24‧‧‧balance block

25‧‧‧ inside bevel

26‧‧‧Single wheel

30‧‧‧ Dynamic balance correction device

31‧‧‧ grinding wheel

32‧‧‧Right grinding wheel

33‧‧‧ left grinding wheel

34‧‧‧ dial

35‧‧‧Disc surface

41‧‧‧ annular groove

42‧‧‧balance block

43‧‧‧Spindle motor

44‧‧‧Was

45‧‧‧ screws

46‧‧‧stop screws

47‧‧‧ steel balls

51‧‧‧ concave slope

52‧‧‧Outer side wall

53‧‧‧Outside

54‧‧‧ inside

Θ‧‧‧ angle

55‧‧‧Circular inner wall

56‧‧‧ bottom

57‧‧‧Open side

58‧‧‧ Groove surface

59‧‧‧ bottom side of the trough

FH‧‧‧first height

SH‧‧‧second height

SL‧‧‧ Straight line

HL‧‧ horizontal line

61‧‧‧First groove

62‧‧‧second groove

631, 632‧‧‧ surface

RD‧‧‧ radial

71‧‧‧Right position

711‧‧‧ endpoint

72‧‧‧Open position

73‧‧‧Fixed position

74‧‧‧Place location

75‧‧‧Retracted position

81‧‧‧Outer ring scale

82‧‧‧ Inner ring scale

91‧‧‧ Inside trench

92‧‧‧ outer groove

DA‧‧‧Preset angle

The first figure is a schematic cross-sectional view of a fixing device for adjusting the dynamic balance of the grinding wheel of the prior art; the second drawing is a schematic cross-sectional view of another prior art fixing device for adjusting the dynamic balance of the grinding wheel; A schematic perspective view of a grinding wheel correction device combined with a grinding wheel and a spindle motor according to a preferred embodiment of the present invention; FIG. 3B is a top plan view of a grinding wheel equipped with a grinding wheel of the third drawing A; It is a three-dimensional schematic diagram of the calibration device, the grinding wheel and the spindle motor in the third figure A; the fifth figure is a schematic cross-sectional view of the dial in the fourth figure; the sixth figure is the stop screw in the fourth figure a three-dimensional schematic diagram of the steel ball in the balance block; Figure 7 is a schematic cross-sectional view of the grinding wheel, dial, steel ball and stop screw in the third picture A; the eighth picture is the front view of the dial in the fourth picture; the ninth picture: the balance block is distributed in A front view on the dial in the third diagram A; and a tenth view: a side view showing the grinding wheel mounted on the spindle motor in the third diagram A.

In order to allow the weight to be more firmly fixed in the dial, the present invention proposes the following dynamic balance correcting device.

Referring to FIG. 3A, a dynamic balance correcting device 30 according to a preferred embodiment of the present invention is shown for use in a grinding wheel 31 (ie, mounted on a grinder 311 shown in FIG. a right grinding wheel 32 of a 75° angled blade or a left grinding wheel 33 of a 65° angled blade, comprising a dial 34 (ie, an adapter disk) mounted on the grinding wheel 31, a disk of the dial 34 The surface 35 has an annular groove 41 as shown in the fourth figure. The three weights 42 are fixed to the dial 34. The grinding wheel 31 is a diamond grinding wheel and is mounted on a spindle motor 43 and A Washer 44 is inserted into a screw 45 and locked along the axial direction AD, and the three weights 42 utilize three stop screws 46 (ie, a pressing member) and three steel balls 47 ( That is, the fastener or metal ball) is fixed.

A concave inclined surface 51 as shown in FIG. 5 is disposed on the annular groove 41. The dial 34 has an outer side wall 52 having an outer side surface 53 and an inner side surface 54 (ie, facing away from the outer side surface 53). The annular outer wall) is located on the inner side surface 54 and, when extending inwardly, synchronizes the concave outward side surface 53 (ie, gradually increases toward the outward side surface 53 as the depth of the annular groove 41 increases). The angle θ between the concave slope 51 and the horizontal plane may be 5° to 15°, as long as it is a concave slope which is gradually concave toward the outward side surface 53, and the geometrical structure is used to make the steel ball 47 more stable when the concave concave surface 51 is abutted. That is, the annular groove 41 has an annular outer wall, an annular inner wall 55 and a bottom portion 56. The annular outer wall has an angle of less than 90 degrees with the bottom portion 56, and the annular outer wall is a concave slope 51. Or the annular groove 41 has an opening side 57 (only the lower opening side is indicated in the figure, and the upper opening side symmetrically opposite the lower opening side is not further labeled), a groove surface 58 and A groove bottom side 59 (shown in the figure below the axis, there is also a symmetrical opening side, a groove surface and a groove bottom side above the axis).

Further, the fastener and the pressing member may be collectively referred to as a fastening device for fastening the weight 42 to the groove surface 58. The first height FH of one of the opening sides 57 is smaller than the second height SH of one of the groove bottom sides 59, and the corresponding positions of the upper opening side 57 and the groove bottom side 59 constitute a straight line SL (the line indicating only the upper opening side in the figure) The straight line on the lower opening side, which is symmetrical with the straight line on the upper opening side, is not further labeled, and has an angle θ with a horizontal line HL. Each of the weights 42 has a first groove 61 and a second groove 62 as shown in FIG. 6, the first groove 61 is parallel to the axial direction AD, and the second groove 62 is along a radial direction. RD settings. In one embodiment, the number of steel balls 47 in the dial 34 is at least three, in addition to being equal to the number of the three weights 42, but also a multiple thereof (for example, when 6 steel balls are used, the second concave The opening diameter of the groove 62 needs to be halved.

The stop screw 46 is disposed in the first recess 61, and the steel ball 47 is disposed in the second recess 62. The first recess 61 and the second recess 62 are respectively disposed adjacent to the balance blocks 42. Two surfaces 631, 632. The stop screw 46 is used to push the steel ball 47 to the top position 71 as shown in the seventh figure, so that the steel ball 47 abuts the concave slope 51, The counterweight 42 is fixed within the dial 34. An end point 711 of the stop screw 46 is rotated from an open position 72 (to be inserted into the annular groove 41 before the weight 42 is inserted into the second groove 62) into a fixed position 73 to be locked. At the same time, the steel ball 47 is pushed from a placement position 74 to the abutment position 71. The stop screw can be rotated from the fixed position 73 to a retracted position 75 (ie, the third position) to loosen the steel ball 47 to facilitate the balance block 42 to change to the preset angle and move to an equilibrium position (eg, to make the balance block 42 Move 5° in the clockwise direction, not shown in the figure).

The equilibrium position determines the movement angle of each of the weights 42 by a balancing instrument to calculate the center of mass at the time of dynamic balance. Referring to the eighth figure, the dial 34 has an outer ring scale 81 and an inner ring scale 82. The outer ring scale 81 is one grid (i.e., one unit) of 5 degrees, and the inner ring scale 82 is one grid of 30 degrees to facilitate A user adjusts the position of the weight 42 in the dial 34 in accordance with the movement angle, the outer ring scale 81 and the inner ring scale 82. Referring to FIG. 9 , the weight 42 further defines an inner groove 91 and an outer groove 92 to facilitate alignment of the inner ring scale 82 and the outer ring scale 81 of the dial 34 (ie, an adapter disk). The respective 42 are disposed in the annular groove 41 at a predetermined angle DA (for example, 120°) from each other, and in the tenth diagram, the grinding wheel 31 is mounted on the spindle motor 43.

The present invention may further be a method for correcting the dynamic balance of the grinding wheel 31, comprising providing an adapter disk mounted on the grinding wheel 31, the adapter disk having an annular groove 41 and being disposed on the annular outer wall of the annular groove 41. A plurality of weights 42 are disposed on the adapter plate, and each of the weights 42 has an axial direction and a radial groove, and three stop screws 46 are disposed in the axial grooves. Three metal balls are placed in each of the radial grooves, and each of the stop screws 46 is pressed to abut the metal ball to the abutting position 71, so that the metal ball abuts the concave slope 51 and will The weight 42 is fixed to the adapter Inside.

Example

A calibration device for a grinding wheel, comprising a dial mounted on the grinding wheel, a disc-shaped surface of the dial having an annular groove, the annular groove having an annular outer wall, An annular inner wall and a bottom portion, the annular outer wall and the bottom portion having an angle of less than 90 degrees, wherein the annular outer wall is a concave inclined surface, and the three balance blocks are respectively disposed in the annular groove and spaced apart from each other a predetermined angle, each of the weights has a first groove and a second groove, and the first groove and the second groove are respectively disposed on two adjacent surfaces of the balance block, at least three steel balls, the at least three The number of the three steel balls is equal to or multiplied by the number of the three balance blocks, and is installed in the second groove, and three stop screws are installed in the first groove to push the steel ball to one In the top position, the steel ball is placed against the concave slope to fix the weight in the dial.

2. The calibration device of embodiment 1, wherein the annular outer wall has an outer side surface and the inner concave slope facing away from the outer side surface, and the inner concave slope surface increases with the depth of the annular groove Gradually biased towards the outer side.

3. The calibration device of any one of embodiments 1 or 2, wherein the first recess is provided with a first position and a second position, and each of the stop screws is locked, even if each of the stop An end of the screw is rotated from the first position to the second position and simultaneously the ball is pushed from the placed position of the second groove to the abutment position.

4. The calibration device of any one of embodiments 1 to 3, wherein the first recess is further provided with a third position, and each of the stop screws is rotated to rotate the end point from the second position to the The third position relaxes the steel ball, causes the balance block to change to the predetermined angle and moves to an equilibrium position, and the balance position calculates a center of mass at the time of dynamic balance by a balance instrument, and determines each balance block A moving angle.

5. The calibration device of any one of embodiments 1 to 4, wherein the dial has an outer ring scale and an inner ring scale, the outer ring scale being disposed on the top surface of the annular outer wall and at 5° For one unit, the inner ring scale is disposed on the top surface of the annular inner wall and is in units of 30°, and a user adjusts the balance block according to the moving angle, the outer ring scale and the inner ring scale. The position inside the dial.

A correction device for dynamic balancing of a grinder, wherein the grinder has a grinding wheel, the correcting device comprises an adapter plate mounted on the grinding wheel and having an annular groove, wherein the ring The groove has an opening side, a groove surface and a groove bottom side, and a first height of the opening side is smaller than a second height of the bottom side of the groove, and the three balance blocks are disposed in the annular groove. a three-card firmware for respectively locking the three balance blocks on the surface of the groove, and three pressing members for respectively operating the three-card fasteners, wherein each of the pressing members is operated, so that each The fasteners are completed to secure the weights on the surface of the groove.

A correction device for dynamic balancing of a grinder, wherein the grinder has a grinding wheel, the correcting device comprises an adapter plate mounted on the grinding wheel and having an annular groove, wherein the ring The groove has an opening side, a groove surface and a groove bottom side, and a first height of the opening side is smaller than a second height of the bottom side of the groove, and a balance block is disposed in the annular groove. And a fastening device for fastening the weight to the surface of the groove.

8. The calibration device of embodiment 7, wherein the corresponding positions of the open side and the bottom side of the groove form a straight line and have an angle with a horizontal line, and the fastening device comprises a fastener for The balance block is clamped to the surface of the groove.

A method for correcting a dynamic balance of a grinding wheel, comprising: providing an adapter disk mounted on a grinding wheel, the adapter disk having an annular groove and a ring shape in the annular groove The outer wall is provided with a concave inclined surface, and a plurality of weights are arranged on the adapter plate, each of the balance blocks has an axial direction and a radial groove, and a plurality of screws are arranged in each of the axial grooves, and a plurality of the plurality of screws are arranged Metal balls are formed in each of the radial grooves, and each of the screws is pressed to abut the metal ball to an abutting position, and the metal ball is abutted against the concave bevel to balance the weight Fixed in the adapter.

10. The calibration method of embodiment 9, wherein the weight is further provided with an inner groove and an outer groove for aligning with an inner ring scale and an outer ring scale of the adapter disk, and the grinding wheel For a diamond wheel.

In summary, the present invention can be used in a new design, by pushing the steel ball against the concave bevel on the dial, so that the steel ball can be more stable by using the geometric structure when the concave concave surface is offset. And the rotation stop screw used to relax the steel ball to move down the mode, can achieve the effect of flexible movement of the balance block. Therefore, anyone who is familiar with this skill can be modified by all kinds of ideas, but they are not protected by the scope of the patent application.

Claims (6)

A calibration device for a grinding wheel, comprising: a dial mounted on the grinding wheel, a disc-shaped surface of the dial having an annular groove, the annular groove having an annular outer wall and a ring An inner wall and a bottom, the annular outer wall and the bottom are at an angle of less than 90 degrees, such that the annular outer wall is a concave slope; three balance blocks are respectively disposed in the annular groove and spaced apart from each other An angle, each of the weights has a first and a second groove, and the first and the second grooves are respectively disposed on two adjacent surfaces of the balance block; three steel balls, the three steel balls The number is the same as the number of the three balance blocks, and is installed in the second groove; and three stop screws are installed in the first groove to push the steel ball to a top position, so that The steel ball abuts the concave slope to fix the weight in the dial, wherein the first groove is provided with a first position and a second position, when each of the stop screws is locked, even if each An end of the stop screw is rotated from the first position to the second position, and the steel ball is simultaneously removed from a placement position of the second groove is pushed to the abutting position, and the first groove is further provided with a third position, and each of the stop screws is rotated to rotate the end point from the second position to the The third position relaxes the steel ball, causes the balance block to change to the predetermined angle and moves to an equilibrium position, and the balance position calculates a center of mass at the time of dynamic balance by a balance instrument, and determines each balance block A moving angle. The calibration device of claim 1, wherein the annular outer wall has an outer side surface and the inner concave slope facing away from the outer side surface, and the inner concave slope surface increases with the depth of the annular groove And gradually biased toward the outer side, and the three steel balls are at least a number The amount is either a multiple of the number of the three balance blocks. The calibration device of claim 1, wherein the dial has an outer ring scale and an inner ring scale, and the outer ring scale is disposed on a top surface of the annular outer wall and is in units of 5 degrees. The inner ring scale is disposed on the top surface of the annular inner wall and is in units of 30°, and a user adjusts the balance block in the dial according to the moving angle, the outer ring scale and the inner ring scale s position. A correcting device for dynamic balancing of a grinder, wherein the grinder has a grinding wheel, the correcting device comprises: an adapter disc mounted on the grinding wheel and having an annular groove, wherein the annular recess The groove has an opening side, a groove surface and a groove bottom side, and a first height of the opening side is smaller than a second height of the bottom side of the groove; three balance blocks disposed in the annular groove and mutually Each of the balance blocks has a first groove and a second groove, and the first groove and the second groove are respectively disposed on two adjacent surfaces of the balance block; For respectively locking the three balance blocks on the surface of the groove; and three pressing members for respectively operating the three fasteners, wherein each of the pressing members is operated, and each of the fasteners is completed. Fixing the balance block on the surface of the groove, wherein the first groove is provided with a first position and a second position, and when each of the pressing members is locked, even if an end point of each of the pressing members is Rotating the first position to the second position and simultaneously removing the fastener from the second recess The position is pushed to the abutting position, and the first groove is further provided with a third position, and each of the pressing members is rotated to rotate the end point from the second position to the third position to relax the fastener.俾 moving the balance block to the preset position and moving to an equilibrium position, and the balance position is by a The balance instrument calculates the center of mass at the time of dynamic balance and determines the movement angle of one of the balance blocks. A method for correcting the dynamic balance of a grinding wheel, comprising: providing an adapter disk mounted on a grinding wheel, the adapter disk having an annular groove and having an inner annular wall of the annular groove a concave bevel; a plurality of balance blocks are disposed on the adapter plate, each of the balance blocks has an axial direction and a radial groove; a plurality of screws are disposed in each of the axial grooves; and a plurality of metal beads are disposed Each of the radial grooves; and pressing the screws to abut the metal ball to an abutting position, and the metal ball abuts the concave slope to fix the weight to the rotation In the tray, the first groove is provided with a first position and a second position, and when each of the screws is locked, even if an end of each screw is rotated from the first position to the second position, Simultaneously pushing the metal ball from a placement position of the second groove to the abutting position, and the first groove is further provided with a third position, and each of the screws is rotated to make the end point Rotating the second position to the third position to relax the metal ball, causing the balance block to change the preset angle Moved to a position of equilibrium, and the equilibrium position of the system is calculated by a balancing instrument out of balance when the center of mass, the movement angle is determined for each one of the balancing mass. The calibration method of claim 5, wherein the weight is further provided with an inner groove and an outer groove for aligning with an inner ring scale and an outer ring scale of the adapter disk, and The grinding wheel is a diamond grinding wheel.