JPS6117795Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an automatic feed device that is attached to a general-purpose machine tool to achieve automatic cycling.

For example, in order to automate machine tools such as drill presses, lathes, and milling machines, the use of NC is progressing by installing numerical control devices, but converting to NC requires complicated mechanisms and large capital investments. In addition, the accuracy of the NC device and general-purpose machine tool does not necessarily match, making it impossible to take full advantage of the effectiveness of the NC device.

In addition, adopting an NC device requires major modification of general-purpose machine tools, and there is a problem in that it requires skilled technology to operate.

This invention was made in view of the above points, and the purpose is to provide an automatic feed device that can easily set the position of a general-purpose machine tool with high precision, and that can automate the general-purpose machine tool at a low cost. be.

Another purpose of this invention is to use a positioning mechanism with coarse positioning accuracy and a positioning mechanism with precise positioning accuracy. It is an object of the present invention to provide an automatic feed device for a machine tool that controls a slow feed process and is capable of improving work efficiency through fast feed and improving work position accuracy through slow feed.

In order to solve the above-mentioned problems and achieve each objective, this invention has an externally fitted main rotating shaft that is switched and driven by the fast-feeding motor and slow-feeding motor via a clutch. Dotsu ring to insert,
Two sets of positioning mechanisms are installed, each consisting of a switch that is turned on and off by a dog attached to the outer circumference of this dog ring.One positioning mechanism fixes the dog ring to the main rotating shaft, and the other positioning mechanism A dog ring is rotatably attached to the main rotating shaft, and the rotatable dog ring and the main rotating shaft are linked via a speed reduction mechanism.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments of the accompanying drawings.

The feeding device in FIGS. 1 and 2 shows a first example in which two sets of positioning mechanisms are arranged in series, and Case 1
The main rotating shaft 2 is rotatably supported on the
A fast-feeding motor 3 and a slow-feeding motor 4 whose speed can be controlled are attached, and the output shaft 5 of the fast-feeding motor 3 is connected to the main shaft via a first intermediate shaft 6 and a group of reduction gears 7. The main rotating shaft 2 is interlocked with the rotating shaft 2, and the motor 3 can provide the main rotating shaft 2 with forward and reverse high-speed rotation for rapid forwarding.

In the reduction gear group 7, the gear 7a attached to the main rotating shaft 2 is keyed so as to be movable in the axial direction with respect to the main rotating shaft 2, and is interlocked with a shift lever 8 pivotally fixed to the case 1. This allows the main rotation shaft 2 to be disengaged from the lower gear and rotate freely as required.

The slow feed motor 4 is connected to the reduction gear group 7.
The lowest gear 7b is interlocked with the electromagnetic clutch 10 attached to the second intermediate shaft 9 and the reduction gear mechanism 11. After the fast-forwarding process is completed, the clutch 10 is engaged and the slow-speed rotation of the slow-moving motor 4 is stopped. , are transmitted to the main rotating shaft 2 via both reduction gear groups 7 and 11.

Both positioning mechanisms 12 and 13 attached to the main rotation shaft 2 have a cylindrical holder 14 fitted onto the main rotation shaft 2.
A plurality of dog rings 15 are externally inserted into the body and connected with bolts 16, and each dog ring 1
The dog 17 is fixed in a groove provided on the outer periphery of each dog ring 15 so that its position can be adjusted in the circumferential direction.
The limit switch 18 and the proximity switch, which are turned on and off at 7, are arranged by being attached to the case 1, and each limit switch 18 is electrically connected to the fast-forward and slow-forward motors 3, 4, and the fast-forward, Both motors are controlled to perform cutting feed, slow return, fast return, etc.

The positioning mechanism 12 with coarse positioning accuracy is key-coupled to the main rotating shaft 2 and rotates together with the main rotating shaft 2, so that the linear movement distance of the cutter in the machine tool is directly taken out on the outer periphery of the dog ring 15. Fast forwarding is performed by controlling motors 3 and 4.

The positioning mechanism 13 with high positioning accuracy is fitted onto the main rotating shaft 2 so as to rotate freely, and is connected to the main rotating shaft 2, the reduction gear group 19, and the reduction gear 20.
The cutting tool rotates at a low speed with respect to the main rotating shaft 2, and the linear movement distance of the cutting tool is expanded to the outer periphery of the dog ring 15 to improve positioning accuracy.

The precise positioning mechanism 13 with this positioning accuracy is
The detection accuracy improves in proportion to the reduction ratio with respect to the main rotating shaft 2, and the reduction ratio may be determined based on work efficiency and accuracy.

The automatic feed device is fitted into the handle shaft of the machine tool and fixed with a fixing bracket that also serves as a detent. so that it rotates in unison with the

The first example of this invention has the above-mentioned configuration, in which the main rotating shaft 2 is attached to the machine tool in conjunction with the handle shaft, and both positioning mechanisms 12 and 1
3. Set the position of each dog 17 according to the work content.

To operate the machine tool in this state, first start the rapid traverse motor 3, rotate the main rotating shaft 2 at high speed via the reduction gear group 7, and perform the rapid traverse of the cutter. is detected by the doggling and limit switch of the positioning mechanism 12, which has coarse positioning accuracy, and the slow feed motor 4 and clutch 1 are simultaneously turned off when the motor 3 is turned off.
0, and the main rotating shaft 2 enters slow feed rotation for cutting and drilling.

When the slow feed process reaches just before the end, the positioning mechanism 13 with high positioning accuracy detects this and decelerates the slow feed motor 4.

As the main rotating shaft 2 rotates, the positioning mechanism 13 with high positioning accuracy also rotates at low speed, and this positioning mechanism 1
The end point of the slow feed process is detected by the dog ring and limit switch 3, and the motor 4 and the clutch 10 are de-energized and stopped.

Thereafter, the rapid feed motor 3 is energized to rotate in the opposite direction to that during fast feed, the main rotating shaft 2 is reversed, and the cutter returns to its pre-processing position.

Next, the second example shown in FIG. 3 is a case where the positioning mechanism 12 with coarse positioning accuracy and the positioning mechanism 13 with precise positioning accuracy are arranged in parallel.
The same parts as in the example above are given the same reference numerals.

This second example has a reducer 20 at the bottom of the case 1.
The input shaft 20a is connected to the main rotating shaft 2 and the reduction gear group 19, and the main rotating shaft 2 is provided with a positioning mechanism 12 with coarse positioning accuracy, and the output shaft 20b is provided with a positioning mechanism 13 with precise positioning accuracy. They are designed to be installed individually.

Also, the third example shown in FIGS. 4 and 5 is the second example.
Similar to the above example, this is a different example in which both positioning mechanisms 12 and 13 are arranged in parallel.
The main rotating shaft 2 and the precise positioning mechanism 13 are connected to the chain 23 and sprocket 2 via the reducer 20 provided on the case 1.
4, the rotation of the main rotating shaft 2 is controlled by the positioning mechanism 13.
It is designed to transmit data at a reduced speed.

Note that the vertically long or horizontally long shape of the case 1 and the series or parallel arrangement of both positioning mechanisms may be selected in accordance with the type of general-purpose machine tool such as a lathe, a drilling machine, or a milling machine.

Furthermore, in either example, the positioning setting can be performed by operating the shift lever 8 to free the main rotating shaft 2 and operating the handle of the machine tool.
By using program control as the control method, various automatic cycles can be performed.

As described above, according to this invention, a positioning mechanism with coarse positioning accuracy is provided on the main rotating shaft that is switched and driven by the fast-feeding motor and the slow-feeding motor, and the positioning mechanism with coarse positioning accuracy is provided on the main rotating shaft via the deceleration mechanism. By linking the main rotation axis to the handle axis of a general-purpose machine tool, the machine tool can be turned into an automatic cycle machine. Since the momentum can be expanded and taken out by the feeding process, the positioning of the cutter can be done to the hundredths of a degree, and the positioning accuracy is greatly improved.

In addition, since it is only necessary to attach the main rotating shaft to the handle shaft in conjunction with the handle shaft, automation of general-purpose machine tools is possible without special modifications. Positioning settings can be easily made by operating the handle, and the control method can be programmed. By providing a control, various automatic cycles can be performed.

Furthermore, since rapid traverse can be performed using a positioning mechanism with coarse positioning accuracy and slow traverse can be controlled using a positioning mechanism with precise positioning accuracy, work efficiency can be greatly improved compared to when everything is controlled by a positioning mechanism with precise positioning accuracy. It is possible to make significant improvements.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing a first example of an automatic feeder according to the invention, FIG. 2 is a side view of the main parts of the same, and FIG. Figure 4 is a partially cross-sectional plan view showing the third example;
FIG. 5 is a front view of the same as above. 1... Case, 2... Main rotating shaft, 3... Rapid feed motor, 4... Slow feed motor, 7, 19...
Reduction gear group, 8...shift lever, 10...electromagnetic clutch, 12, 13...positioning mechanism, 15...dog ring, 17...dog, 18...limit switch, 20...reduction gear.

Claims (1)

[Scope of utility model registration request] The main rotating shaft is switched and driven by the fast-feeding motor and slow-feeding motor via a clutch, and consists of a dog ring that is fitted onto the main rotating shaft, and a switch that is turned on and off by a dog attached to the outer circumference of this dog ring. Two sets of positioning mechanisms are installed, one positioning mechanism has its dog ring fixed to the main rotating shaft, and the other positioning mechanism has its dog ring attached to the main rotating shaft so that it can rotate freely. An automatic feed device for machine tools that links the dog ring and main rotating shaft via a reduction mechanism.