JP4807665B2 - Lathe with bar work supply means - Google Patents

Description

  The present invention relates to a lathe with a bar work supplying means for supplying a long bar work to a main shaft and sequentially feeding the bar work from the main shaft for turning.

  As shown in Patent Document 1, the lathe with a bar work supply means is a part where the tip side of the bar work protrudes and is gripped, the protruding tip side is turned, and the processed part is processed after processing. After that, the bar work is fed out by the bar work supply means, and the next work is sequentially turned, and there is an advantage that it does not take time to supply each work cut in advance. is there.

  In this bar work, although the rear end side is supported by the bar work supply means, it is impossible to avoid certain eccentricity and blurring, and the main shaft cannot be rotated at high speed. For this reason, conventionally, the rotational speed during turning is always limited to a certain value or less based on the longest length before the machining.

However, in this state, even when the work of the bar work progresses and the remaining length of the bar work is shortened and the influence of eccentricity is reduced, the processing speed is limited to the rotation speed based on the longest length. The processing speed could not be improved further. Even in Patent Document 1, this problem has not been recognized.
JP 59-76753 A (FIG. 1)

  The present invention is intended to solve the above-mentioned problem, and utilizes the phenomenon that the influence of eccentricity becomes smaller as the remaining length of the bar work becomes shorter, and the bar work supply means that can improve the processing speed The issue is to provide a lathe.

  The lathe with bar work supply means according to claim 1 is provided at a rear side of the main shaft, a main shaft for supporting the front end side of the bar work, a processing means for processing the front end side of the bar work protruding forward from the main shaft, and the main shaft. , A bar work supply means for supporting the rear end side of the bar work and feeding it in the direction of the main shaft, and increasing the rotational speed of the main shaft as the remaining length from the front end of the main shaft to the rear end of the bar work decreases. And a bar work remaining length corresponding control means for controlling the bar work to be performed.

  A lathe with bar work supply means according to claim 2 is dependent on claim 1 and comprises setting data associating the remaining length of the bar work with the rotational speed of the spindle, The number of revolutions of the spindle is controlled according to setting data.

  The lathe with bar work supply means according to claim 3 is dependent on claim 1 or 2, and is supported by the main shaft at a position facing the main shaft, supports the separated workpiece, and from the opposite side. An opposing main shaft for machining the workpiece is provided, and the rotational speed of the opposing main shaft can be controlled independently of the rotational speed of the main shaft.

According to the lathe with bar work supply means according to claim 1, a main shaft that supports the front end side of the bar work, a processing means that processes the front end side of the bar work protruding forward from the main shaft, and a rear side of the main shaft. A bar work supplying means for supporting the rear end side of the bar work and sending it in the direction of the main shaft, and the number of rotations of the main shaft as the remaining length from the front end of the main shaft to the rear end of the bar work decreases. Since the barwork remaining length corresponding control means for controlling so as to speed up is provided, the rotational speed of the spindle can be flexibly changed in accordance with the remaining length of the barwork, thereby increasing the machining cycle time.
That is, it is possible to improve the machining speed by utilizing the phenomenon that the influence of eccentricity becomes smaller as the remaining length of the bar work becomes shorter.

  According to the lathe with bar work supplying means according to claim 2, in addition to the effect of claim 1, the bar work remaining length corresponding control means comprises setting data in which the remaining length of the bar work and the rotational speed of the spindle are associated with each other. Controls the rotation speed of the spindle according to the setting data, so that the spindle can be reliably rotated at the optimum high speed.

  According to the lathe with bar work supply means according to claim 3, in addition to the effect of claim 1 or 2, the workpiece supported by the main shaft is processed at a position facing the main shaft, and the separated work is supported. An opposing main shaft for processing the workpiece from the side to be provided is provided, and the rotational speed of the opposing main shaft can be controlled independently of the rotational speed of the main shaft. When using a higher rotational speed, the cycle time as a whole can be improved.

  Hereinafter, embodiments (examples) of the present invention will be described with reference to the drawings.

  FIG. 1 (a) is a block diagram conceptually showing an example of a lathe with a bar work supply means of the present invention, (b) and (c) are diagrams showing a bar work support portion of (a), and (d) is The figure which shows the principal-axis part of (a), FIG. 2 is a front view which shows the whole external appearance of the lathe with a bar-work supply means of FIG.

  The lathe 10 with bar work supply means is provided at the rear of the main shaft 1 for supporting the front end side of the bar work BW, the processing means 2 for processing the front end side of the bar work protruding forward from the main shaft 1, and the main shaft 1. The bar work supply means 3 that supports the rear end side of the bar work BW and sends it in the direction of the main shaft 1 and the rotation speed of the main shaft 1 as the remaining length L from the front end of the main shaft 1 to the rear end of the bar work BW becomes shorter. It is characterized by comprising a barwork remaining length correspondence control means 4 for controlling so as to increase the speed.

  The lathe 10 with bar work supply means also includes setting data that associates the remaining length L of the bar work with the rotational speed of the spindle 1 in the storage means 5 included in the control means 4 corresponding to the remaining length of the bar work. The bar work remaining length correspondence control means 4 controls the rotational speed of the spindle 1 according to the setting data.

  Further, as shown in FIG. 2, the lathe 10 with bar work supply means supports a work separated and supported by the main shaft 1 at a position facing the main shaft 1, and supports the work from the opposite side. The counter main shaft 6 is provided, and the rotation speed of the counter main shaft 6 can be controlled independently of the rotation speed of the main shaft 1.

  In addition, the lathe 10 with bar work supply means moves the opposed machining means 7 for machining the workpiece supported by the opposed spindle 6 and the workpiece machined and separated by the spindle 1 to the opposed spindle 6 side. A workpiece moving means 8 for taking out a workpiece processed by the opposed main shaft 6 and moving it to a predetermined place is provided.

Now, the lathe 10 with bar work supply means of the present invention will be described in more detail. The feature of the lathe 10 is the bar work remaining length correspondence control means 4, and the other parts are generally known. Since there is no difference from a lathe with a bar work supply means, detailed description is omitted except for necessary portions.
The known part of the lathe 10 with bar work supply means has a detailed configuration of various lathes with bar work supply means that are generally known.

The main shaft 1 includes a chuck 1b provided with a chuck claw 1a for fixing the tip end side of the bar work BW to be processed, and a motor 1c for rotating the chuck 1b.
The processing means 2 has a processing tool 2a fixed at its tip so as to be attachable / detachable. This processing means 2 may be a so-called turret type in which a plurality of processing tools 2a are fixed so as to be detachable and replaceable, and an arbitrary processing tool 2a can be used by control.

The bar work supply means 3 waits for the required number of long bar works BW and supplies the bar works BW one by one in response to a command from the CPU 4a. As the process is completed, the bar work BW is sequentially sent to the spindle 1 side.
In order to perform the above function, the bar work supply means 3 includes a support means 3a for supporting the rear end side of the bar work BW so as not to be shaken while allowing the rotation thereof, and the bar work BW at the time of stationary. Feeding means (not shown) for sending to one side and a bar work shelf (not shown) for placing the bar work BW to be put on standby are provided.

Barwork remaining length correspondence control means 4 is realized as a function of a part of the control means for controlling the entire lathe 10 with the barwork supply means, and a central processing means for the control ( CPU) 4a and the storage means 5 are provided.
The workpiece moving means 8 includes a workpiece moving arm 8a that moves a workpiece processed by the opposed main shaft 6 to the workpiece shelf 8b. The workpiece is transferred from the main shaft 1 to the opposed main shaft 6 directly by moving the opposed main shaft 6 to the main shaft 1.

In general, the bar work BW to be processed by the lathe 10 with the bar work supplying means cannot have zero eccentricity or no blur over its entire length, as shown in FIG. As shown in a), there is a certain eccentricity e.
Conventionally, due to this eccentricity e, in the processing with a lathe with a bar work supply means, the bar work BW cannot be rotated at a high speed, and the rotation speed that does not adversely affect the vibration during high speed rotation is It was the upper limit of the rotation speed when processing a lathe with workpiece supply means.

However, as can be seen from FIG. 1 (a), the amount of the eccentricity e increases as the remaining length L from the front end of the spindle 1 to the rear end of the bar work BW becomes shorter as the bar work BW is processed. It will be smaller.
The inventor of the present application pays attention to this point, and if the influence of eccentricity becomes smaller as the remaining length L of the bar work BW becomes shorter, the bar work BW should be able to rotate at a higher speed. Therefore, the idea is that the rotational speed for machining on the spindle 1 can be increased accordingly.

Specifically, the bar work remaining length correspondence control means 4 performs the following control as an example, but this is an example, and a specific control method by the bar work remaining length correspondence control means 4 is concrete. The content is not limited to this.
1) The rotational speed of the spindle 1 commanded by the machining program can be automatically switched, for example, in four stages.

2) The spindle rotational speed is switched every time the count value of the cycle counter that counts for each machining cycle (a series of procedures for machining one workpiece) reaches a certain count-up value.
3) This control is basically performed by a macro program.
4) The cycle counter is automatically reset when the bar work supply means 3 supplies a new bar work BW.

5) Macro variables are used for the count value and count-up value of the cycle counter.
6) The count value and the count-up value can be arbitrarily set and changed using the setting data.
Thus, the bar work remaining length correspondence control means 4 performs control so that the rotation speed of the main shaft 1 is increased as the remaining length L from the front end of the main shaft 1 to the rear end of the bar work BW is shortened. Compared to the conventional case where the rotation speed is restricted, machining at a higher speed can be realized.

In other words, according to this lathe 10 with bar work supply means, the rotational speed of the spindle 1 can be flexibly changed in accordance with the remaining length L of the bar work BW, and the machining cycle time can be increased.
Further, the barwork remaining length correspondence control means 4 uses the setting data stored in the storage means 5 utilizing the data accumulated so far for the above control, so it is surely optimal as much as possible. The main shaft 1 can be rotated at a high speed.

  Further, according to the lathe 10 with the bar work supply means, the counter spindle 6 is provided, and the counter spindle 6 is controlled in its rotational speed and the like independently of the spindle 1. Independent of the main shaft 1 having the upper limit rotational speed of the BW limit rotational speed, a higher degree of freedom can be used, and if necessary, rotation at a higher speed can be used.

  Therefore, the degree of freedom of processing as a whole can be improved, and when the rotational speed at a higher speed is used, the cycle time as a whole can be improved.

  As mentioned above, although the specific example of this invention was described in detail in the Example, these are only illustrations and do not limit a claim. The invention described in the claims, that is, the technical scope of the present invention includes various modifications and changes of the specific examples described above as described in various places.

  For example, here, an example of the opposed biaxial type including the opposed main shaft 6 and the opposed machining means 7 has been described as the lathe 10 with the bar work supply means equipped with the remaining workpiece length corresponding control means 4. The barwork remaining length correspondence control means 4 of the invention is not limited to such an opposed two-axis type, and can be applied to any lathe as long as it is a lathe that turns a barwork. .

  The lathe with bar work supply means of the present invention is used in an industrial field in which it is required to improve the machining speed by utilizing the phenomenon that the influence of eccentricity becomes smaller as the remaining length of the bar work becomes shorter. it can.

(A) is a block diagram which shows notionally an example of the lathe with a bar work supply means of this invention, (b), (c) is a figure which shows the bar work support part of (a), (d) is (a) ) Diagram showing the spindle part The front view which shows the whole external appearance of the lathe with a bar work supply means of FIG.

Explanation of symbols

1 Spindle
2 Processing means
3 Bar work supply means
4 Barwork remaining length control means
5 Memory means
6 Opposed spindle
7 Counter machining means
8 Work moving means
10 Lathe with bar work supply means
BW Bar Work

Claims (3)

  A main shaft for supporting the front end side of the bar work, a processing means for processing the front end side of the bar work protruding forward from the main shaft, and provided at the rear of the main shaft, supporting the rear end side of the bar work, Bar work supply means for feeding in the main shaft direction, and bar work remaining length corresponding control means for controlling to increase the rotational speed of the main shaft as the remaining length from the front end of the main shaft to the rear end of the bar work decreases. A lathe with bar work supply means.   The bar work supply means according to claim 1, further comprising setting data associating the remaining length of the bar work with the rotation speed of the spindle, wherein the bar work remaining length correspondence control means controls the rotation speed of the spindle according to the setting data. Lathe with.   An opposing main shaft is provided at a position facing the main shaft to support and work the separated work supported by the main shaft, and to process the work from the opposite side. The lathe with bar work supply means according to claim 1 or 2, wherein the lathe can be controlled independently of the rotational speed.

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