JPS63288614A - Centering machine - Google Patents

Abstract

PURPOSE:To form a centering machine simple further compact, by constituting the centering machine moving a shaft-shaped workpiece, clamped by clamp units, in a direction at a right angle with the axial center so as to be fed to a machining position from the predetermined supply position. CONSTITUTION:A shaft-shaped workpiece 22, clamped by clamp units 18, 20 in a supply position, is fed being left as clamped to a machining position, machining a center hole in the end face by rotary tools 48, 50. Consequently, a centering machine, which eliminates the necessity for the delivery action in the machining position as in the past as a result performing a series of processes by the simplified action, performs an easy control. While a feed device such as in the above, moving the clamp units 18, 20 and feeding the shaft-shaped workpiece 22 from the supply position to the machining position, can be constituted simple further compact as compared with when a device, clamping the shaft-shaped workpiece 22 to the machining position, and a feed device are separately constituted.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a centering machine, and more particularly to an improvement in a feeding device for feeding an axial workpiece to be processed from a predetermined feeding position to a processing position.

BACKGROUND OF THE INVENTION A centering machine is widely known as a device for machining a center hole in the end face of a shaft-shaped workpiece. As a type of centering machine, a clamp unit grips the axial workpiece at a predetermined processing position so that it cannot rotate around the axis and cannot move in the axial direction, and the machine faces the end face of the axial workpiece. A method of drilling a center hole in the end face of the shaft-like workpiece by rotating a rotary tool disposed in the shaft-like workpiece and moving the rotary tool and the clamp unit relatively toward and away from each other in the axial direction of the shaft-like workpiece. There is something.

Moreover, such a centering machine is equipped with a feeding device at -1 for feeding the shaft-like workpiece from a predetermined supply position to the processing position, and at the supply position, the receiver receives the taken shaft-like workpiece. Usually, the material is transported to a processing position and gripped by the clamp unit.

Problems to be Solved by the Invention However, such conventional feeding devices require a transfer operation of the axial workpiece between the clamp unit and the clamp unit at the machining position, and therefore the centering machine including the feeding device is The operation is complicated, and the structure is also complicated and large-scale, which is not always satisfactory.

Means for Solving the Problems The present invention has been made against the background of the above circumstances.
The purpose is to feed a shaft-like workpiece to a processing position with a simple structure and operation.

In order to achieve such an object, the present invention provides a centering machine of the type described above, in which the clamp unit is used to transport the shaft-shaped work gripped by the clamp unit in a direction perpendicular to its axis. The present invention is characterized in that it is provided with a feeding device that moves the shaft-like workpiece in a manner such that the shaft-like workpiece is fed from a predetermined supply position to the processing position.

Operation and Effects of the Invention With this method, the axial workpiece gripped by the clamp unit at the supply position is fed to the machining position while being gripped by the clamp unit, and a center hole is machined in the end face of the workpiece by the rotary tool. As a result, there is no need for the conventional transfer operation at the processing position, and a series of processes of the centering machine can be performed with simple operations, making control easier. Furthermore, since such a feeding device moves the clamp unit to feed the shaft-like workpiece from the supply position to the processing position, the device for gripping the shaft-like workpiece at the processing position and the feeding device are configured separately. The centering machine can be constructed more easily and compactly than in the case where the centering machine is used.

Note that even at the stage of feeding the shaft-like workpiece from the supply position to the processing position, the shaft-like workpiece is held by the clamp unit so as to be unable to rotate around the axis and cannot move in the axial direction. A process of feeding the axial workpiece to a processing position by employing a center drill that processes the center hole and a plurality of chips that are provided around the center drill and perform end face cutting on the axial workpiece. It is also possible to have the end face milled.

EXAMPLE Hereinafter, an example of the present invention will be described in detail based on the drawings.

1 and 2, a pair of recessed columns 12.14 are provided on the base 10, and a loader arm 16 is supported between the upper portions of the recessed columns 12.14. A pair of clamp units 18 and 20 are disposed on the loader arm 16, and a shaft-like workpiece 2 having a cylindrical shape is provided.
It is designed to hold 2.

As shown in FIG. 3, the clamp units 18, 20 each include a pair of gripping claws 24, 26, a tension coil spring 28 hooked between the gripping claws 24, 26, and a gripping claw. 24 and 26 are provided. The gripping claws 24 and 26 are both rotatably attached to the loader arm 1 via pins 32 and 34.
6, and is normally biased in the direction in which the lower end opens by the tension coil spring 28, but when the mock member 30 is pulled upward by the cylinder 36 (see FIG. 2), the tension coil spring 28 By closing the lower end portions against the urging force, the shaft-shaped workpiece 22 is centered and gripped between the lower end portions. The shaft-shaped workpiece 22 is firmly gripped by the pair of clamp units 18 and 20 so that it cannot rotate around the axis and cannot move in the axial direction.

The loader arm 16 includes a clamp unit 18.2.
A pair of rotating shafts 38 and 40 are provided on the same axis, parallel to the axis of the shaft-shaped workpiece 22 held at 0, and protruding in both left and right directions. is rotatably but axially immovably supported on the portal column 12.14. Also, one rotating wheel 3
The main shaft of a motor 42 disposed outside the concave column 12 is connected to the tip of the column 8 so as to be non-rotatable. It is rotated about a rotation axis of 38 degrees and 40 degrees.

As a result, the clamp unit 18.20 disposed on the loader arm 16 is moved to transport the gripped axial workpiece 22 in a direction perpendicular to its axis, and the axial workpiece 22 is supplied. a predetermined supply position;
The shaft-like workpiece 22 is located at a processing position where a center hole is machined in the end face of the shaft-like workpiece 22, and at a delivery position where the shaft-like workpiece 22 with the center hole machined thereon is transferred to a subsequent process. In this embodiment, the feeding device is constituted by a concave column 12.14 that rotatably supports the loader arm 16, a motor 42 that rotates the loader arm 16, and the like. Further, as shown in FIG. 1, the supply position is set on the front side of the centering machine in the longitudinal direction, the processing position is set approximately in the center thereof, and the delivery position is set on the rear side.

On the other hand, on the base lO and below the gate-shaped column 12.degree. 14, the main spindle units 1-44, 46 are disposed in a state facing each other. The spindle units 44, 46 are each equipped with rotary tools 48, 50 that are opposed to the end face of the shaft-like workpiece 22 at the machining position, and the rotary tools 48, 50 are connected to splines fixed to pulleys 52, 54, respectively. It is connected to the shafts 56, 58 so as to be movable relative to each other in the axial direction and not rotatable relative to the shaft center. As shown in FIG. 1, the pulleys 52 and 54 are each connected to a drive shaft 60 (see FIG. 1) via a belt, and are rotationally driven by a motor 62.

As shown in an enlarged view in FIG. 4, the rotary tool 48 includes a main body 64, and a center drill 66 that is disposed in the main body 64 so as not to be relatively rotatable, with its tip protruding from the main body 64. It consists of a plurality of tips 68 arranged around the center drill 66 with cutting edges slightly protruding beyond the tip of the center drill 66, and the main body 64 is connected to the spline shaft 56 via a connector (not shown). At the same time, the coupling member is held by the main shaft unit 44 so as to be rotatable but not relatively movable in the axial direction. Further, the center drill 66 is for drilling a center hole in the end face of the shaft-like workpiece 22, and the tip 68 is for cutting the end face prior to drilling the center hole. Note that the other rotating tool 50 is also the same as this rotating tool 4.
The rotary tool 48 is rotated clockwise and performs cutting, whereas the rotary tool 50 is rotated counterclockwise to perform cutting. is configured to do so.

The spindle units) 44 and 46 are movable in a direction parallel to the axis of the shaft-like workpiece 22 by guide rails 70 and 72, respectively, and are moved toward and away from each other in synchronization with a feed screw (not shown) or the like. It is now possible to As a result, the rotary tool installed on the spindle unit 744, 46.

48 and 50 are reciprocated in the axial direction of the shaft-like workpiece 22, and center holes are drilled in both end faces of the shaft-like workpiece 22 by the center drill 66. In addition, the main shaft unit 44.4
6 is always a rotary tool 48 as shown in FIG.
．． 50 tips 68 are held in a position where they can perform end face cutting on the end face of the shaft-like workpiece 22, and in the process of the shaft-like workpiece 22 being gripped by the clamp unit 18.20 and being fed from the above-mentioned supply position to the processing position. , the end face of the shaft-like workpiece 22 is shaved by a chip 68. In addition, these main spindle units) 44.
46 are respectively covered by covers 74 and 76.

Next, the operation of this embodiment will be explained.

First, when the loader arm 16 is rotated toward the front side of the centering machine and the clamp unit (18.degree. 20) is held at the supply position, the axial workpiece 22 is supplied to the supply position by a supply device (not shown). The shaft-like workpiece 22 is held by the lamp units 18 and 20 so that it cannot rotate around the axis and cannot move in the axial direction. Thereafter, by rotating the rotary tools 48 and 50 and rotating the loader arm 16 to feed the shaft-like workpiece 22 to the processing position, both end faces of the shaft-like workpiece 22 are ground by the chip 68. Ru.

At the beginning of the rotation, the loader arm 16 is moved rapidly, but during the process of end face milling, the loader arm 16 is moved slowly, and the rotary tool 48
．． 50 is rotationally driven at a rotation speed suitable for end face milling.

In addition, the above-mentioned feeding device is arranged so that the shaft-like workpiece 22 is placed in a position corresponding to the holding position of the main spindle unit 44, 46 so that both end faces of the shaft-like workpiece 22 are milled in the process of being fed to the processing position. 22 is positioned in the axial direction and supplied to the supply position.

When the shaft-shaped workpiece 22 is sent to the processing position, the rotation of the loader arm 16 is stopped, and then the spindle unit 1-
44 and 46 are moved forward toward each other. At this time, the rotation speed of the rotary tool 48.50 is changed to a speed suitable for machining the center hole, and the center drill 66 of the rotary tool 48.50 drills the center hole in both end faces of the shaft-like workpiece 22.

Thereafter, when the spindle unit (48.50) is retreated to its original position, the loader arm 16 is rotated to the rear side of the centering machine, and the shaft-like workpiece 22 is held at the delivery position while being held by the clamp unit (18.20). will be sent to. A lathe device, etc. (not shown) is disposed at the rear of the centering machine, and when the gripping operation by the clamp units 18 and 20 is released, the shaft-like workpiece 22 is placed directly or directly on the lathe device, etc. at the delivery position. Uke is passed indirectly.

In this way, according to the centering machine of this embodiment,
The shaft-like workpiece 22 gripped by the clamp unit 18.2 in the supply position is held by the clamp unit 18.2.
The shaft-shaped workpiece 22 is gripped at the center of the workpiece 0 and fed to the machining position, the center hole is machined, and then sent to the delivery position.
Compared to the case of handing over and receiving goods, the series of processes performed by the centering machine can be performed with simple operations, making it easier to control.

Further, since a clamp unit 18.20 for gripping the shaft-like workpiece 22 is incorporated into the loader arm 16, a device for gripping the shaft-like workpiece 22 at the processing position and a device for gripping the shaft-like workpiece 22 from the supply position are also provided. The centering machine can be constructed more easily and compactly than in the case where the device for feeding the centering machine to the processing position and the device for feeding it from the processing position to the delivery position are separately constructed.

On the other hand, the rotary tools 48 and 50 of this embodiment are provided with a plurality of tips 68 around the center drill 66, and the end face is ground while the shaft-like workpiece 22 is being fed to the processing position. Compared to the case where the end face milling is performed in a separate process, the equipment required is halved, and the time required for the series of machining operations is significantly shortened.

In addition, in this embodiment, since the shaft-like workpiece 22 is gripped at the lower end of the loader arm 16 supported between the upper ends of the concave columns 12 and 14, the This has the advantage that chips do not fall on the loader arm 16 and the like, making post-processing of the chips easy.

Next, another embodiment of the present invention will be described. In the following embodiments, parts common to those in the above embodiments are designated by the same reference numerals, and explanations thereof will be omitted.

In FIG. 5, reference numeral 80 indicates the clamp unit) 1
8.20 is installed on the loader block, and the bracket 8
The feed screw 86 is rotationally driven by the motor 84 provided in the 2, so that it reciprocates in a direction perpendicular to the axis of the shaft-like workpiece 22 gripped by the clamp unit 18.20 while being guided by the guide rail 88.90. The shaft-like workpiece 22 is moved from a predetermined supply position to a processing position, and the shaft-like workpiece 22 after processing is sent from the processing position to a predetermined delivery position. In this case as well, the same effects as in the previous embodiment can be obtained, and the motor 84. The feed screw 86, guide rails 88, 90, etc. constitute a feeding device. Note that 92 is a cover.

Although the embodiments of the present invention have been described above in detail based on the drawings, the present invention can also be implemented in other embodiments.

For example, in the embodiment described above, the shaft-shaped workpiece 22 after processing is sent to the delivery position, but by releasing the gripping operation of the clamp unit 18.20 at the processing position and dropping the shaft-shaped workpiece 22, The handling of the shaft-like workpiece 22 after processing can be changed as appropriate, such as ejecting it from the apparatus by shaking or the like, or releasing the gripping operation after returning it to the supply position and sending it to the subsequent process. .

Further, although the rotary tools 48 and 50 of the embodiment described above are provided with a plurality of tips 68 to perform end face milling, such tips 68 are not necessarily necessary, and the rotary tools 48 and 50 are equipped with at least a center drill 66. All you need is one.

Further, the tip 68 and the center drill 66 are connected to the main body 6.
However, by providing the center drill 66 so as to be relatively movable in the axial direction, only the center drill 66 can be moved back and forth. You can also do that.

Further, in the embodiment described above, a pair of spindle units 44 and 46 are provided to perform cutting on both end surfaces of the shaft-like workpiece 22, but either one of the spindle units 48 or 50 can be removed and the shaft There is no problem in cutting only one end surface of the shaped workpiece 22.

Further, in the embodiment described above, the center hole is machined by reciprocating the spindle units 44 and 46, but the loader arm 16 or loader block 80 is
It is also possible to machine the center hole by reciprocating in the direction of the second axis.

Further, in the above embodiment, a pair of clamp units 18.2
Although the shaft-shaped workpiece 22 is gripped by the clamp unit 0, the shaft-shaped workpiece 22 may be gripped by one clamp unit, and the structure of the clamp unit can be changed in various ways.

Further, the rotary tools 48 and 50 of the above embodiment are rotated in opposite directions via the drive shaft 60, that is, the rotary tool 48 is rotated clockwise and the rotary tool 50 is rotated counterclockwise. It is also possible to rotate in the same direction by using a motor or the like. In that case, the rotational moments acting on the axial workpiece 22 cancel each other out, and the rotational force applied to the clamping unit 18.20 is reduced.

Although other examples are not given, the present invention can be implemented with various modifications and improvements based on the knowledge of those skilled in the art without departing from the spirit thereof.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a centering machine that is an embodiment of the present invention. 2 is a longitudinal sectional view of the machine of FIG. 1; FIG. FIG. 3 is a diagram showing the clamping unit of the machine of FIG. 1. FIG. 4 is a cross-sectional view of the rotary tool of the machine of FIG. 1; FIG. 5 is a perspective view showing another embodiment of the present invention. tz, t4: Gate-shaped column 18.20: Clamp unit 22: Shaft-shaped workpiece 42.84: Motor 48.50
: Rotary tool 86: Feed screw AA, 9o guide rail Applicant: Kyoho Seisakusho Co., Ltd. Toyota Motor Corporation 1st rI! J Figure 3 Figure 5

Claims (2)

[Claims] (1) While the clamp unit grips the shaft-like workpiece at a predetermined machining position so that it cannot rotate around the axis and cannot move in the axial direction, the rotating shaft is placed opposite the end surface of the workpiece. In the centering machine of the type that drills a center hole in the end face of the shaft-like workpiece by rotating the tool and moving the rotary tool and the clamp unit relatively toward and away from each other in the axial direction of the shaft-like workpiece, The clamp unit is moved so that the axial workpiece gripped by the clamp unit is conveyed in a direction perpendicular to its axis, and the axial workpiece is fed from a predetermined supply position to the processing position. A centering machine characterized by being equipped with a feeding device. (2) The rotary tool includes a center drill that processes the center hole, and a plurality of tips that are provided around the center drill and perform end face cutting when the shaft-shaped workpiece is sent to the processing position. A centering machine according to claim 1, which is a centering machine.