JP4056122B2 - Grinding machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a grinding machine for grinding a workpiece by a rotating grinding wheel.
[0002]
[Prior art and problems to be solved by the invention]
As a conventional grinding machine, it has been proposed to attach a sub head provided with another grinding wheel to a main head provided with a grinding wheel. The sub head is provided so as to be movable relative to the main head, and is movable between a machining position for machining the workpiece and a retreat position that does not hinder the workpiece when machining the workpiece with the grinding wheel of the main head.
[0003]
However, in the grinding machine, a motor for rotating the grinding wheel is provided for each head. Providing a plurality of expensive motors leads to an increase in unit price of the grinding machine. In addition, there is no room for arranging a large motor in the sub head that is attached to the main head. Therefore, a small motor is used for rotational driving of the grinding wheel of the sub head. However, the torque of a small motor is insufficient, and the grinding speed of the work by the grinding wheel of the sub head is slow.
[0004]
The present invention has been made paying attention to the problems existing in the above prior art, and an object thereof is to provide a grinding machine including a plurality of grinding wheels at low cost.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, the column (11) standing on the bed (12) and the work (W) placed on the bed (12) are placed. And a main head (13) having a main grindstone shaft (15) supported by the column (11) via a lifting mechanism and rotated by an electric motor (14). ,
The main grinding wheel (16) which is detachably fixed to the main grinding wheel shaft (15), the processing position lowered relative to the main head (13), and the relative height raised relative to the main head (13). A secondary head (19) having a secondary grinding wheel shaft (22) mounted on the primary head (13) so as to be movable up and down between the retracted positions, and a secondary grinding wheel (23) fixed to the secondary grinding wheel shaft (22). ), A holder (24) that is fixed to the sub head (19) and holds the intermediate shaft (25), and ends of the intermediate shaft (25) on the side of the grinding wheels (16) and (23) And a pulley (27) fixed to the opposite end of the pulley (26) and a pulley fixed to the end of the auxiliary grinding wheel shaft (22) opposite to the auxiliary grinding wheel (23). (28), the pulley (28) of the auxiliary grinding wheel shaft (22) and the grinding wheel of the intermediate shaft (25) (16), (23) provided with a belt (29) wound around the pulley (27) on the opposite side to the auxiliary head (19) in a state where the sub head (19) is moved to the retracted position. Grinding is performed by rotating the main grinding wheel (16) via the main grinding wheel shaft (15) by the rotation of the electric motor (14), and the sub head (19) is moved to the processing position. The main grinding wheel (16) is removed from the main grinding wheel shaft (15), the pulley (30) is attached to the main grinding wheel shaft (15), and the belt (31) is connected to the pulley (30) and the intermediate shaft (25). Are wound around the pulleys (26) at the ends of the grinding wheels (16) and (23), and the main grinding wheel shaft (15), the intermediate shaft (25) and the auxiliary grinding wheel are rotated by the rotation of the electric motor (14). By rotating the auxiliary grinding wheel (23) through the shaft (22), A feature and the grinder that cutting machining is performed.
[0007]
(Function)
In the invention of claim 1 having the above-described configuration, a motor for rotationally driving the main grinding wheel is used for rotational driving of the auxiliary grinding wheel. Therefore, a dedicated motor for rotating the auxiliary grinding wheel is not necessary.
[0008]
In the invention of claim 1 , the rotational force of the motor is transmitted to the auxiliary grinding wheel shaft via the main grinding wheel shaft.
Furthermore, in the first aspect of the invention, even when the rotation of the main grindstone shaft is increased or decelerated and transmitted to the auxiliary grindstone shaft, the effective outer diameter ratio of the pair of rotating bodies around which the belt is wound can be reduced. It is possible to prevent the winding angle of each of the rotating bodies from becoming extremely small.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment embodying the present invention will be described.
As shown in FIGS. 1A and 1B, the column 11 is erected on the bed 12. The main head 13 is supported on the front surface of the column 11 via a lifting mechanism (not shown). The electric motor 14 is built in the main head 13. The output shaft of the electric motor 14 forms the main grindstone shaft 15. The horizontal main grinding wheel 16 is detachably fixed to the main grinding wheel shaft 15.
[0010]
The workpiece W is disposed on the bed 12 via a table device 17 (not described in detail). The workpiece W can reciprocate linearly in the horizontal direction of the drawing by the operation of the table device 17.
[0011]
The elevating rail 18 is fixed to the side surface of the main head 13. The sub head 19 is attached to the main head 13 via the elevating rail 18. The ball screw 20 is juxtaposed with the lifting rail 18 on the side surface of the main head 13 and is threaded through a part of the sub head 19. The handle 21 is gear-coupled to the ball screw 20 (not shown), and the ball screw 20 is rotated in the forward and reverse directions by the rotation operation. The sub grinding wheel shaft 22 is rotatably held by the sub head 19. The horizontal auxiliary grinding wheel 23 has a smaller diameter than the main grinding wheel 16 and is fixed to the end of the secondary grinding wheel shaft 22 on the main grinding wheel 16 side. The sub-head 19 is rotated relative to the main head 13 by rotating the handle 21 in the forward / reverse direction (FIG. 2A), and the retracted position is raised relative to the main head 13. (Fig. 1 (a)) can be moved up and down.
[0012]
The holder 24 is fixed to the upper part of the sub head 19. An intermediate shaft 25 parallel to the grindstone shafts 15 and 22 is rotatably held by a holder 24. The pulley 26 is fixed to the end of the intermediate shaft 25 on the grinding wheels 16 and 23 side, and the pulley 27 is fixed to the opposite end. The pulley 28 is fixed to the end of the auxiliary grinding wheel shaft 22 opposite to the auxiliary grinding wheel 23. The belt 29 is wound around the pulley 28 of the auxiliary grinding wheel shaft 22 and the pulley 27 of the intermediate shaft 25.
[0013]
As shown in FIGS. 1A and 1B, when the workpiece W is machined using the main grinding wheel 16, the sub head 19 is moved to the retracted position. When the electric motor 14 is started, the main grinding wheel 16 is rotated via the main grinding wheel shaft 15, and when the main head 13 is lowered, the main grinding wheel 16 is brought into contact with the reciprocating linearly moving workpiece W. Grinding is performed. In particular, the auxiliary grinding wheel 23 and the auxiliary grinding wheel shaft 22 of the auxiliary head 19 arranged at the retracted position do not hinder the grinding of the workpiece W by the main grinding wheel 16.
[0014]
As shown in FIGS. 2A and 2B, when the workpiece W is processed using the auxiliary grinding wheel 23, the auxiliary head 19 is moved to the processing position. The main grinding wheel 16 is removed from the main grinding wheel shaft 15, and the prepared pulley 30 is mounted on the main grinding wheel shaft 15. The prepared belt 31 is wound between the pulley 30 and the pulley 26. By starting the electric motor 14, the auxiliary grinding wheel 23 is rotationally driven through the main grinding wheel shaft 15, the pulley 30, the belt 31, the pulley 26, the intermediate shaft 25, the pulley 27, the belt 29, the pulley 28, and the secondary grinding wheel shaft 22. . Then, the rotating grinding wheel 23 is brought into contact with the workpiece W that reciprocates linearly by the lowering of the auxiliary head 19 as the main head 13 is lowered.
[0015]
The pulleys 26 to 28, 30 have the same peripheral speed of the small-diameter auxiliary grinding wheel 23 as that of the large-diameter main grinding wheel 16, so that the rotation of the main grinding wheel shaft 15 is increased and the secondary grinding wheel shaft 22 is increased. Pulley ratio (effective outer diameter ratio) to be transmitted.
[0016]
In this embodiment having the above-described configuration, the following effects can be obtained.
(1) The electric motor 14 that rotationally drives the main grinding wheel 15 is configured to also rotationally drive the auxiliary grinding wheel 23. Therefore, a dedicated motor for rotationally driving the auxiliary grinding wheel 23 is not required, and a grinding machine can be provided at a low cost. In addition, the electric motor 14 is built in the main head 13 having a sufficient structure or space as compared with the auxiliary head 19 provided as an accessory. Therefore, a large motor can be used as the electric motor 14, and a sufficient torque can be secured, so that the grinding speed of the workpiece W by the auxiliary grinding wheel 23 can be increased. This leads to a reduction in the processing time of the workpiece W.
[0017]
(2) The intermediate shaft 25 is provided in a belt transmission configuration between the main grindstone shaft 15 and the auxiliary grindstone shaft 22. Therefore, the pulley ratio between the pulleys 30, 26, 27, 28 can be reduced even in the configuration in which the rotation of the main grindstone shaft 15 is accelerated and transmitted to the auxiliary grindstone shaft 22 as in the present embodiment, and the belt 29, The winding angle with respect to the pulleys 30, 26, 27, 28 of 31 does not become extremely small. As a result, it is possible to prevent a decrease in transmission efficiency due to slippage of the belts 29, 31 with respect to the pulleys 30, 26, 27, 28.
[0018]
(3) The main grindstone shaft 15 is used in a power transmission system between the electric motor 14 and the auxiliary grindstone shaft 22. Therefore, the number of component parts is smaller than when the power transmission system between the electric motor 14 and the auxiliary grinding wheel shaft 22 is completely separate from the power transmission system between the electric motor 14 and the main grinding wheel shaft 15. Can be reduced.
[0019]
(4) The electric motor 14 is built in the main head 13, and its output shaft also serves as the main grindstone shaft 15. Therefore, the number of components of the power transmission system from the electric motor 14 to the main grinding wheel 16 can be reduced.
[0020]
For example, a configuration in which a small-diameter grinding wheel is mounted on the main grinding wheel shaft 15 and a large-diameter grinding wheel is mounted on the auxiliary grinding wheel shaft 22 may be used without departing from the spirit of the present invention. In this case, each of the pulleys 26 to 28 and 30 has a pulley ratio for decelerating the rotation of the main grindstone shaft 15 and transmitting it to the auxiliary grindstone shaft 22.
[0021]
If the technical idea which can be grasped | ascertained from the said embodiment is described, the grinding machine of Claim 1 in which the output shaft of the motor 14 serves as the main grindstone shaft 15 as well.
In this way, the number of components of the power transmission system from the motor 14 to the main grinding wheel 16 can be reduced.
[0022]
【The invention's effect】
According to invention of Claim 1 of the said structure, the drive of a main grindstone axis | shaft and a secondary grindstone axis | shaft is made | formed with one motor, and a grinding machine can be provided cheaply.
[0023]
Further, according to the invention of claim 1 can reduce the number of components of the power transmission system to the respective grinding wheel from the motor, it can be provided at low cost grinding machine.
Furthermore, according to the invention of claim 1 , it is possible to increase the power transmission efficiency from the motor to the auxiliary grinding wheel.
[Brief description of the drawings]
FIG. 1A is a front view of a grinding machine when a workpiece is machined using a main grinding wheel, and FIG. 1B is a perspective view showing a power transmission configuration from an electric motor to each grinding wheel.
FIG. 2A is a front view of a grinding machine when a workpiece is machined using an auxiliary grinding wheel, and FIG. 2B is a perspective view showing a power transmission configuration from an electric motor to each grinding wheel.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Column, 12 ... Bed, 13 ... Main head, 14 ... Electric motor as a motor, 15 ... Main grinding wheel shaft, 16 ... Main grinding wheel, 17 ... Table device, 19 ... Sub head, 22 ... Sub grinding wheel shaft, 23 , Auxiliary grinding wheel, 24, holder, 25, intermediate shaft, 26, pulley, 27, pulley, 28, pulley, 29, belt, W, workpiece.

Claims (1)

A column (11) standing on the bed (12);
A table device (17) provided on the bed (12) and capable of reciprocating linear movement in a state in which the work (W) is placed;
A main head (13) having a main grindstone shaft (15) supported by the column (11) via an elevating mechanism and rotated by an electric motor (14);
A main grinding wheel (16) removably fixed to the main grinding wheel shaft (15);
The auxiliary grinding wheel shaft is mounted on the main head (13) so as to be movable up and down between a machining position that is lowered relative to the main head (13) and a retreat position that is raised relative to the main head (13). A sub-head (19) having (22);
A secondary grinding wheel (23) fixed to the secondary grinding wheel shaft (22);
A holder (24) fixed to the sub head (19) and holding the intermediate shaft (25);
A pulley (26) fixed to the end of the intermediate shaft (25) on the grinding wheel (16), (23) side and a pulley (27) fixed to the opposite end;
A pulley (28) fixed to an end of the auxiliary grinding wheel shaft (22) opposite to the auxiliary grinding wheel (23);
A belt (29) wound between the pulley (28) of the auxiliary grinding wheel shaft (22) and the pulley (27) at the opposite end of the grinding wheel (16), (23) of the intermediate shaft (25). )When
With
Grinding is performed by rotating the main grinding wheel (16) via the main grinding wheel shaft (15) by the rotation of the electric motor (14) with the sub head (19) moved to the retracted position. I,
In a state where the sub head (19) is moved to the machining position, the main grinding wheel (16) is removed from the main grinding wheel shaft (15), the pulley (30) is attached to the main grinding wheel shaft (15), and the belt (31 ) Between the pulley (30) and the pulley (26) at the end of the intermediate shaft (25) on the grinding wheel (16), (23) side, and the rotation of the electric motor (14) causes the main A grinding machine characterized in that the grinding is performed by rotating the auxiliary grinding wheel (23) through the grinding wheel shaft (15), the intermediate shaft (25), and the secondary grinding wheel shaft (22) .

Images