JP5443295B2 - Processing equipment - Google Patents

Description

  The present invention relates to a processing apparatus for deburring, for example, a metal workpiece.

  In general, a metal workpiece is subjected to various types of machining, and a protruding remaining portion, that is, a burr is easily generated in the processed portion. This burr is a factor of quality deterioration as a product, and a deburring device is used to remove the burr.

  For example, as shown in FIG. 5, the deburring device disclosed in Patent Document 1 includes a holder 2 that can move up and down with respect to a frame 1 a of the driving device 1. 3 is fixed. A pair of urethane rubbers 5 serving as radial cushions are sandwiched between the pair of brackets 3 with a collar 4 interposed therebetween.

  A cylindrical bearing case 6 is provided inside the collar 4 and the urethane rubber 5, and a spindle 8 is rotatably supported in the bearing case 6 through a bearing 7. The upper part of the spindle 8 is connected to the rotation shaft of the drive device 1 through a universal joint 9. On the other hand, an exchangeable tool T is attached to the lower end of the spindle 8.

  In this deburring apparatus, the holder 2 is lowered while rotating the spindle 8, and a predetermined deburring operation of a work (not shown) is performed by the tool T. At that time, a pressing force for machining is applied to the tool T from the side, and a waviness behavior is induced on the spindle 8. Here, since the pressing force from the side is absorbed by the urethane rubber 5, damage to the tool T and the like can be avoided and a desired deburring operation can be performed satisfactorily.

Japanese Utility Model Publication No. 62-1000081

  However, in the above deburring device, a cylindrical bearing case 6 is disposed on the outer periphery of the spindle 8, and a pair of urethane rubber 5 and a collar 4 are disposed on the outer periphery of the bearing case 6. Furthermore, the holder 2 is arranged on the outermost periphery. For this reason, the dimension of the radial direction of the whole deburring apparatus becomes large considerably, and there exists a problem that the said whole deburring apparatus enlarges.

  In addition, a pair of urethane rubbers 5 is used as a radial cushion. Therefore, a relatively large torque is required when the spindle 8 rotates, and there is a problem that it becomes difficult to use an air motor as a spindle drive mechanism, for example.

  The present invention solves this type of problem, and aims to provide a machining apparatus capable of simplifying the configuration and reducing the size and efficiently performing desired machining using an air motor. Objective.

  A machining apparatus according to the present invention is mounted on a machine tool in a non-rotatable manner, and includes a first casing that houses an air motor that obtains rotational force by driving air supplied from the machine tool, and the first casing. A second casing that is swingably connected via a swing mechanism.

  The second casing is provided with a spindle portion that is connected to a rotary shaft of an air motor via a joint member so as to be tiltable, rotates together with the rotary shaft, and is attached with a tool.

  On the other hand, the swing mechanism is provided with a plurality of spring members whose opposite ends are fixed to the first casing and the second casing, and a first member provided on one of the first casing and the second casing and having a convex spherical surface. And a second member provided on the other of the first casing and the second casing and having a concave spherical surface that is in sliding contact with the convex spherical surface.

  In this processing apparatus, it is preferable that the virtual centers of the convex spherical surface and the concave spherical surface are arranged on the axis of the rotation axis.

  Furthermore, in this processing apparatus, the tool is preferably a deburring tool.

  According to the present invention, the first casing and the second casing do not rotate when the spindle portion rotates under the action of the air motor. For this reason, it is possible to satisfactorily reduce the torque required at the time of rotation of the spindle portion, and the tool can improve the followability to the cutting resistance at the time of machining. And since an air motor is employ | adopted, the air from the air supply system with which the machine tool is equipped can be diverted as a motive power source (drive air).

  As a result, the configuration can be simplified and miniaturized, and desired processing can be efficiently performed using the air motor.

It is a schematic sectional side view of the processing apparatus which concerns on embodiment of this invention. It is a principal part side view of the said processing apparatus. It is a principal part disassembled perspective explanatory drawing of the said processing apparatus. It is operation | movement explanatory drawing of the said processing apparatus. It is a cross-sectional explanatory drawing of the deburring apparatus currently disclosed by patent document 1. FIG.

  As shown in FIG. 1, a machining apparatus 10 according to an embodiment of the present invention is mounted on a machine tool, for example, an NC machine tool 12. The processing apparatus 10 includes a first casing 14 that is non-rotatably mounted on the NC machine tool 12, and a second casing 18 that is swingably connected to the first casing 14 via a swing mechanism 16. Provided (see FIG. 1 and FIG. 2).

  The first casing 14 is provided with a tapered shank portion 22 to be mounted in the tapered hole portion 20 of the NC machine tool 12, and an air motor unit 26 including an air motor 24 is accommodated in the first casing 14. An air supply path 30 is formed in the taper shank portion 22 so that one end communicates with a driving air passage 28 provided in the NC machine tool 12 and the other end communicates with the air motor unit 26.

  The air motor 24 is provided with a motor shaft (rotating shaft) 32 extending to the opposite side of the tapered shank portion 22. The air motor unit 26 includes a motor housing 34 having a cylindrical shape. The motor housing 34 accommodates the air motor 24 and has a disk-shaped flange portion 36 that projects outward from the first casing 14. As shown in FIGS. 1 and 3, the flange portion 36 penetrates in the motor shaft direction (arrow A direction) and is spaced apart at equal angular intervals in the circumferential direction, for example, eight bolt insertion stages. A perforated portion 38 is formed.

  As shown in FIG. 1, the swing mechanism 16 is provided on the first casing 14 side, provided on the first casing 40 having the convex spherical surface 40a, and on the second casing 18 side, and slides on the convex spherical surface 40a. And a second member 42 having a concave spherical surface 42a in contact therewith. As shown in FIG. 3, eight groove portions 44 are formed in the first member 40 at regular angular intervals from the convex spherical surface 40a side. A screw hole 46 is formed on the bottom surface forming each groove 44. The first member 40 is formed with an air passage 48 that is located between the groove portions 44 and is inclined from the center toward the outer periphery (see FIG. 1).

  When the flange portion 36 of the motor housing 34 and the flat portion of the first member 40 are overlapped, the screws 50 are inserted into the screw holes 46 from the stepped hole portions 38, whereby the first member 40. Is fixed to the motor housing 34. The tip 50a of the screw 50 protrudes into each groove 44 (see FIGS. 1 and 2).

  As shown in FIG. 3, the second member 42 is formed with eight groove portions 52 that are spaced apart from each other by an equiangular interval from the concave spherical surface 42 a side. A screw hole 54 is formed on the bottom surface of each groove 52. The second casing 18 is provided with a large-diameter flange portion 56, and eight bolt insertion stepped hole portions 58 are formed in the flange portion 56 so as to be spaced apart at equal angular intervals.

  The screw 60 inserted into each stepped hole 58 is screwed into the screw hole 54 of the second member 42 and the tip protrudes into each groove 52, so that the second member 42 is attached to the second casing 18. It is fixed (see FIG. 1). For example, both ends of a coil spring 62 are fixed to the tip 50 a of each screw 50 and the tip 60 a of each screw 60.

  In the second casing 18, a spindle portion 68 is rotatably disposed with bearings 64 a and 64 b and collars 66 a and 66 b interposed therebetween. The outer peripheral sides of the bearings 64a and 64b are supported by the covers 70a and 70b.

  A pin member 72 is screwed into one end of the spindle portion 68, and the pin member 72 and the motor shaft 32 are connected to each other via a joint member 74 so as to be tiltable. As the joint member 74, for example, an Oldham joint or a universal joint is used. A hollow shaft 76 is coaxially connected to the other end portion of the spindle portion 68.

  A holder portion 78 is disposed on the shaft 76 so as to be able to advance and retract in the direction of arrow A. The small diameter part 78a of the holder part 78 can enter into the spindle part 68, and the compression spring 80 is arranged around the outer periphery of the small diameter part 78a. Both ends of the compression spring 80 are supported by the end surface of the spindle portion 68 and the boundary portion of the large diameter portion 78 b of the holder portion 78.

  A tool, for example, a deburring tool 82 is attached to the holder portion 78 in a replaceable manner. The virtual centers of the convex spherical surface 40 a and the concave spherical surface 42 a are arranged on the axis of the motor shaft 32 of the air motor 24.

  The operation of the processing apparatus 10 configured as described above will be described below.

  As shown in FIG. 4, for example, the workpiece W is processed with the hole Wa, so that the burr Wb remains on the end surface of the hole Wa. Therefore, an operation for removing the burr Wb is performed using the processing apparatus 10.

  In the processing apparatus 10, the first casing 14 is mounted on the NC machine tool 12, and the first casing 14 and the second casing 18 are connected via the swing mechanism 16. At that time, the first member 40 and the second member 42 constituting the swing mechanism 16 are pulled by each other by eight coil springs 62 arranged at equal angular intervals on the circumference. Therefore, the deburring tool 82 is arranged coaxially with the motor shaft 32 in the no-load state.

  As shown in FIG. 1, when driving air is supplied from the driving air passage 28 on the NC machine tool 12 side to the air supply path 30, this driving air is supplied to the air motor 24 in the air motor unit 26. The motor shaft 32 can be rotated at high speed. The driving air supplied to the air motor 24 is discharged to the outside from a plurality of air passages 48 formed in the first member 40.

  When the motor shaft 32 rotates, the spindle portion 68 rotates integrally with the pin member 72 connected to the motor shaft 32 via a joint member 74. The spindle portion 68 is screwed into the shaft 76, and the deburring tool 82 rotates through the shaft 76 and the holder portion 78. Then, by controlling the NC machine tool 12, the deburring tool 82 relatively enters the hole Wa of the workpiece W and removes the burr Wb.

  At this time, when an external force is applied to the deburring tool 82 from a direction different from the axial direction, the convex spherical surface 40a and the concave spherical surface 42a that constitute the swing mechanism 16 slide, and the first member 40 In contrast, the second member 42 swings. On the other hand, the spindle portion 68 side can tilt the motor shaft 32 with respect to the axis via the joint member 74.

  Therefore, even if the deburring tool 82 receives an external force from the side, the deburring tool 82 can absorb the external force by tilting with respect to the motor shaft 32 of the air motor 24. Thereby, the deburring tool 82 has an advantage that the deburring Wb of the workpiece W can be satisfactorily removed and the deburring operation can be efficiently performed while effectively avoiding damage and the like.

  In this case, in the present embodiment, the first casing 14 and the second casing 18 do not rotate when the spindle portion 68 rotates under the action of the air motor 24. For this reason, it is possible to satisfactorily reduce the torque required when the spindle portion 68 rotates, and the deburring tool 82 can improve the followability to the cutting resistance during processing. Moreover, since the air motor 24 is employed, the air from the air supply system provided in the NC machine tool 12 can be used as a power source (driving air).

  Thereby, in this embodiment, while the processing apparatus 10 aims at simplification and size reduction of a structure, the effect that it becomes possible to perform a desired process efficiently using the air motor 24 is acquired.

DESCRIPTION OF SYMBOLS 10 ... Processing apparatus 12 ... NC machine tool 14, 18 ... Casing 16 ... Swing mechanism 22 ... Taper shank part 24 ... Air motor 26 ... Air motor unit 28 ... Drive air passage 30 ... Air supply passage 32 ... Motor shaft 34 ... Motor housing 40, 42 ... member 40a ... convex spherical surface 42a ... concave spherical surface 48 ... air passage 50, 60 ... screw 62 ... coil spring 68 ... spindle part 74 ... joint member 82 ... deburring tool

Claims (3)

A first casing that is non-rotatably mounted on the machine tool and that houses an air motor that obtains rotational force by driving air supplied from the machine tool;
A second casing that is swingably coupled to the first casing via a swing mechanism;
With
The second casing is provided with a spindle portion that is connected to a rotation shaft of the air motor via a joint member so as to be tiltable, rotates integrally with the rotation shaft, and is attached with a tool.
The swing mechanism includes a plurality of spring members fixed at both ends to the first casing and the second casing;
A first member provided on one of the first casing and the second casing and having a convex spherical surface;
A second member provided on the other of the first casing and the second casing and having a concave spherical surface that is in sliding contact with the convex spherical surface;
A processing apparatus comprising:   The processing apparatus according to claim 1, wherein virtual centers of the convex spherical surface and the concave spherical surface are arranged on an axis of the rotation axis.   The processing apparatus according to claim 1, wherein the tool is a deburring tool.

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