JP2006212737A - Chip winding detector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chip winding detector capable of positively detecting chip produced in cutting a long shaft-like workpiece and wound around to stick to the workpiece. <P>SOLUTION: The chip winding detector is provided with a sensor ring 11 having an inner diameter slightly larger than the outer diameter of the workpiece W to be cut, and a moving means for moving the sensor ring over the whole length of the workpiece so as to fittingly mount the workpiece. The chip winding detector is constituted to detect the chip K coming in contact with the sensor ring when the sensor ring moves. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a chip winding detection device that detects chips adhering to a workpiece when it is cut by a machine tool, particularly a lathe.

  When a long workpiece such as a shaft is cut by a lathe, spiral chips may be generated and wound around and adhered to the workpiece.

  When chips are wound around the workpiece, it may cause troubles such as poor machining accuracy and damage to machining tools such as cutting tools. Furthermore, when a plurality of processing steps are performed while being automatically and continuously conveyed, a problem occurs in a subsequent process to be conveyed, and a problem that a trouble such as conveyance stops occurs during the conveyance.

  In addition, the chips may be wound not only on the workpiece but also on the cutting tool, and even in this case, it causes troubles such as deterioration of processing accuracy and damage of the tool.

  Therefore, there has already been applied for a chip winding detection device for a numerically controlled cutting machine that detects a chip wound around a cutting tool and prevents a trouble beforehand (see, for example, Patent Document 1).

In addition, a turret for a numerically controlled lathe that has been provided with a chip removal device on the tool holder mounting surface of the turret to prevent entanglement of chips generated by the cutting work on the workpiece or the tool has already been filed (for example, Patent Document 2).
Japanese Utility Model Publication No. 6-45317 (page 1-4, FIG. 2) JP-A-6-297204 (page 1-3, FIG. 9)

  When the outer surface of a long workpiece is cut so as to have a predetermined diameter, spiral chips are generated and wound around and adhered to the workpiece. It is difficult to completely remove the helical chips by a removal operation such as simply blowing compressed air.

  In addition, in a machine tool configured to cut multiple workpieces simultaneously using a lathe equipped with multiple spindle heads and send them to the next process, a pair of workpieces to be processed at the same time are aligned to ensure the quality and quantity of the workpieces. It is desirable to transport to the next process.

  To do so, after cutting a long shaft-shaped workpiece, check for the presence of chips adhering to the outer periphery of the workpiece, and then use a workpiece with no abnormalities or a pair of workpieces with no abnormalities simultaneously in the next process. It is desirable to carry.

  In order to solve the above-described problems, an object of the present invention is a chip capable of reliably detecting chips generated when cutting a long shaft-shaped workpiece and wound around the workpiece. It is to provide a winding detection device.

  In order to achieve the above object, the invention according to claim 1 is a chip winding detection device for detecting chips wound around and attached to a shaft-shaped workpiece to be lathe processed, A sensor ring having an inner diameter slightly larger than an outer diameter; and a moving means for moving the sensor ring over the entire length of the work so as to fit the work, and when the sensor ring moves, It is characterized by detecting the chips that come into contact with the sensor ring.

  According to the first aspect of the present invention having the above-described configuration, it is possible to reliably detect which part of the long workpiece is wound and adhered.

  According to a second aspect of the present invention, the sensor ring includes a contact sensor, the moving means holds a holding bracket that holds the sensor ring, a slide guide that slidably supports the holding bracket, And a cylinder member that moves the holding bracket in the axial direction of the workpiece.

  According to the second aspect of the invention having the above-described configuration, since the cylinder member is moved via the slide guide, the sensor ring having an inner diameter slightly larger than the outer diameter of the workpiece is provided along the axis of the workpiece. Therefore, it is possible to accurately detect the chips adhering to the workpiece.

  According to a third aspect of the present invention, a plurality of air injection nozzles for injecting compressed air toward the outer surface of the workpiece to be fitted are arranged on the front surface in the traveling direction of the sensor ring, equally arranged on the circumference. The workpiece surface after the compressed air is blown over the entire circumference of the workpiece is searched for.

  According to the invention according to claim 3 having the above-described configuration, the cutting oil and dust adhering to the work, and easy-to-removable chips and the like can be removed by blowing compressed air, which is slightly smaller than the outer diameter of the work. Even when a sensor ring having a large inner diameter is fitted to the workpiece, the conductive cutting oil does not react erroneously by contacting the sensor ring. Therefore, it is possible to accurately detect the presence or absence of chips wound in a spiral that is difficult to remove.

  According to the present invention, the sensor ring having an inner diameter slightly larger than the outer diameter of the workpiece moves over the entire length of the workpiece so as to fit the workpiece, and is wound around and adhered to the workpiece. Therefore, it is possible to obtain a chip winding detection device capable of reliably detecting the chip regardless of where the chip adheres to the outer peripheral portion of the long shaft-shaped workpiece. it can.

  Hereinafter, an embodiment of a chip winding detection device according to the present invention will be described in detail with reference to FIGS. 1 to 5.

  First, the chip winding detection device 1 will be described with reference to FIGS. 1 and 2. The chip winding detection device according to the present embodiment may be a single chip winding detection device including only one sensor ring or a chip winding detection device including a pair of two. Here, the sensor ring 11 is used. The chip winding detection device 1 having a pair of two will be described.

  The chip winding detection device 1 includes a sensor ring 11 and moving means for moving the sensor ring 11. The moving means includes a holding bracket 3 that integrally holds the detecting means 2 (2A, 2B) each including the sensor ring 11, a slide guide 4 that slidably supports the holding bracket 3, The cylinder member 5 moves the holding bracket 3.

  The sensor ring 11 can freely contact and separate from the workpiece W supported by the workpiece chuck T, and has an inner diameter D1 larger than the outer diameter of the workpiece. For this purpose, as shown in FIG. 1, the reciprocation in the direction of arrow C is made between a position A separated from the work W and a position B moved in the work W direction and approaching the work chuck T. Yes.

  The holding bracket 3 is integrally mounted with detection means 2A and 2B. Each detection means includes a sensor ring 11, a ring bracket 12 that holds the sensor ring 11, and a holder 13, and the holder 13 is fixed to the holding bracket 3. That is, the holding bracket 3 is configured to hold the sensor ring 11 via the holder 13.

  Further, the spacing pitch P of the respective sensor rings 11 held by the respective holders 13 is correctly adjusted to a dimension that matches a distance P1 between a pair of left and right workpieces W described later, and the holder 13 is fixed by a set screw 30. Has been. For this purpose, the cylinder 5 is slidably moved while being guided by the slide guide 4, and can be reciprocated so as to fit the workpiece W.

  For this purpose, when searching for chips adhering to the pair of left and right workpieces W, the pair of sensor rings 11 are moved forward in a direction approaching the workpiece W, and the two workpieces W are simultaneously fitted. It is possible to detect the chip K attached to the sensor ring 11 and the work piece wound around the entire length of the work W.

  The sensor ring 11 may be any sensor body that detects a conductive substance such as metal, but in the present embodiment, the contact sensor 10 is fixed to the metal sensor ring 11. Further, the ring bracket 12 and the holder 13 that hold the metal sensor ring 11 are made of non-conductive resin. Therefore, when a conductive foreign object comes into contact with the sensor ring 11, the electrical resistance changes, and by detecting this change through the contact sensor 10, the presence or absence of a foreign object, particularly metallic chips, is detected. It can be set as a sensor body.

  Of course, it is possible to manufacture the sensor ring 11 itself as a contact sensor, but it is inconvenient because a contact sensor having an inner diameter corresponding to the outer diameter of the workpiece W to be searched needs to be prepared in advance. Therefore, if the sensor ring 11 is configured such that the contact sensor 10 is fixed to a metal ring machined to a predetermined inner diameter, a metal ring having an inner diameter corresponding to the outer diameter of the workpiece W may be prepared. It is possible to cope with this.

  In FIG. 2, reference numeral 6 denotes a base, and the holding bracket 3 is attached to the slide guide 4 fixed on both sides of the base 6 via a slide block 31. For this purpose, the detection means 2 that is mounted on the holding bracket 3 and includes the sensor ring 11 is configured to slide along the slide guide 4. Further, the cable 8 connected to the detecting means 2 that is slidably moving passes through the cable guide 7 that is a bendable structure.

  As shown in FIG. 3, the inner diameter D1 of the sensor ring 11 is slightly larger than the outer diameter D2 of the workpiece W, and the gap E is set to about 1 mm in the present embodiment. For this reason, when spiral cuttings are generated by lathe cutting and wound around the workpiece W, a part of the cuttings protrude beyond the gap E at any part on the circumference. As a result, the protruding chips come into contact with the sensor ring 11.

  A plurality of air injection nozzles 14 (14a, 14b, 14a, 14b, 14a, 14b, 14a, 14b, 14a, 14b, 14a, 14b, 14a, 14b, 14a, 14b 14c, 14d) are arranged equally on the circumference.

  Chips adhering to the workpiece W are detected by moving the detecting means 2 while spraying compressed air from the plurality of air ejection nozzles 14 in the direction of arrow 14A and blowing it around the entire circumference of the workpiece W. It is set as the structure which detects K. Therefore, cutting oil and dust adhering to the workpiece W, and easily removable chips can be removed by blowing compressed air, and the presence or absence of the spirally wound chips K can be accurately detected. be able to.

  Further, since the cutting oil having conductivity is blown away, the sensor ring 11 is prevented from coming into contact with the cutting oil having conductivity and erroneously detected, and a more accurate chip winding detection device can be obtained. .

  An air pipe 15 supplies compressed air to the air injection nozzle 14. In the present embodiment, four air injection nozzles 14 are provided on the circumference. However, the number is not limited to this number, and three or six may be used. Any quantity that can be sprayed is acceptable. However, in order to spray the entire circumference of the workpiece W without any problem, it is preferable to provide a plurality of air injection nozzles equally arranged on the circumference.

  Since it is set as the above, according to the chip winding detection apparatus 1 concerning this invention, when cutting the shaft-shaped workpiece | work W, the chip | tip K is winding and adhering to which part of the workpiece | work W. However, it is possible to reliably detect the chips K.

  Next, the overall configuration of the chip winding detection device 1 according to the present invention will be described in detail with reference to FIGS. 4 and 5. 4 shows a plan view of the entire apparatus, and FIG. 5 shows a side view.

  The chip winding detection device 1 according to the present embodiment is a detection device having a pair of sensor rings 11 and can simultaneously search for the chip K attached to each of the two workpieces W. In addition, each workpiece W is held at its base side with a distance P1 from the work chuck T, and the side opposite to the base side is a free end. The sensor ring 11 can be inserted toward the head. At this time, as described above, the detecting means 2A and 2B each having the sensor ring 11 are fixed by the set screw 30 so that the separation pitch P of the detection means 2A and 2B is equal to the distance P1.

  Also, slide guides 4 are installed at both ends on the base 6, and the holding brackets 3 are mounted via slide blocks 31 arranged on both sides so as to straddle the two slide guides 4. Yes. Therefore, the holding bracket 3 is configured to slide on the slide guide 4 while being guided at both ends thereof, and can accurately move horizontally on the base 6.

  A cylinder member 5 is installed on one end side of the base 6, and a rod 50 of the cylinder member 5 is fixed to an attachment member 32 provided at one end of the holding bracket 3. Therefore, by driving the cylinder member 5, the holding bracket 3 provided with the detecting means 2 can be scanned from the position A to the position B shown in the figure without rattling over the entire length of the workpiece W.

  Further, a damper 51 and a stopper 52 are mounted on the pull-back portion of the rod 50 so that the sensor ring 11 does not collide with the work chuck T.

  Therefore, even if the holding bracket 3 having the sensor ring 11 is moved at a high speed, the mounting member 32 first comes into contact with the damper 51 to alleviate the impact, and is stopped by the stopper 52 while being braked. That is, by adjusting the installation position of the stopper 52, the stop position of the holding bracket 3 can be defined, and the sensor ring 11 can be moved to a position very close to the work chuck T.

  A cable 8 is connected to the contact sensor 10 fixed to the sensor ring 11, and the cable 8 is inserted into the wiring tube 9 via a bendable cable guide 7. Therefore, even the contact sensor 10 including the cable 8 can freely move horizontally with the holding bracket 3.

  Further, since the air pipe 15 connected to the air injection nozzle is also an elastic tube piped through the cable guide 7, it is possible to follow the horizontal movement of the holding bracket 3 and perform predetermined air injection. .

  Since it is set as the above, even if it is a chip winding detection apparatus provided with the two sensor rings 11, it carries out the said detection by fitting the two workpiece | work W with which each workpiece | work chuck | zipper is mounted | worn. The means 2 can be moved accurately and parallel along the axial direction of the workpiece W to detect chips. Therefore, as described above, the sensor ring 11 having an inner diameter slightly larger than the diameter of the workpiece W can be scanned along the two workpieces W, and the chips K attached to the workpiece W can be removed. It can be detected reliably.

  Of course, when the workpiece W is processed and conveyed one by one, the single sensor ring 11 is provided, a holding bracket that holds the sensor ring, and a slide guide that slidably supports the holding bracket. The chip K attached to the workpiece W can also be detected using a moving means including a cylinder member that moves the holding bracket in the axial direction of the workpiece.

  Each workpiece W cut into a predetermined shape is transferred to the next process by a transfer means (not shown). If the chips K adhering to the workpiece W are detected, they are discharged using a discharge means (not shown) and inspected and repaired by the operator. Also, in the process of processing and transporting two at the same time, it is important to process normal products every two.

  Therefore, if any one of the workpieces W cut at the same time has a defect, it cannot be transferred to the next process as it is. Even if there is no defect in the machining shape, if the above-described chip K is wound around and attached to the surface of the workpiece W, the machining accuracy of the next process may be deteriorated or the machining tool may be damaged. Therefore, it is better not to carry it to the next process as it is in the case of the shape defect.

  In the present embodiment, as described above, the chips K attached to the periphery of the two workpieces W processed at the same time are simultaneously investigated over the entire length of the workpiece W, and the chips are also detected in either one of the workpieces W. When it is detected that K is attached, the two workpieces W are simultaneously discharged by a discharge means (not shown).

  In addition, the two workpieces W discharged to the discharge unit may be inspected and repaired by the hands of workers who circulate every predetermined time, sent to the next process at the same time, and then continue the subsequent processing.

  As described above, according to the chip winding detection device according to the present invention, the sensor ring provided with the contact sensor is moved by the cylinder member via the slide guide, so that the inner diameter is slightly larger than the outer diameter of the workpiece. Even if it is a sensor ring which has this, it can be made to slide correctly along the axis line of a workpiece | work, and the chip adhering to a workpiece | work can be detected correctly.

  Furthermore, while exploring over the entire length of the workpiece while injecting compressed air from a plurality of nozzles, cutting oil and dust adhering to the workpiece W, and easy-to-removable chips etc. After removal, only the chips K wound in a spiral shape that is difficult to remove can be accurately detected without malfunction.

It is a schematic side view which shows the effect | action of the chip winding detection apparatus which concerns on this invention. 1 is an overall front view of a chip winding detection device according to the present invention. It is an expanded sectional view which shows the state of the sensor ring fitted to the workpiece | work. It is a top view which shows the outline | summary of the whole chip winding detection apparatus which concerns on this invention. It is a side view which shows the outline | summary of the whole chip winding detection apparatus which concerns on this invention.

Explanation of symbols

1 Chip winding detection device 2, 2A, 2B detection means 3 Holding bracket (moving means)
4 Slide guide (moving means)
5 Cylinder member (moving means)
11 Sensor ring 14 Air injection nozzle D1 Inner diameter (of sensor ring)
D2 Outer diameter (of workpiece)
K Chip W Work

Claims (3)

A chip winding detection device for detecting chips adhering to a lathe-worked shaft-shaped workpiece,
A sensor ring having an inner diameter slightly larger than an outer diameter of the workpiece to be cut; and a moving means for moving the sensor ring over the entire length of the workpiece so as to fit the workpiece. A chip winding detection device that detects the chip contacting with the sensor ring when moving.   The sensor ring includes a contact sensor, and the moving means holds the sensor ring, a slide guide that slidably supports the holding bracket, and the holding bracket in the axial direction of the workpiece. The chip winding detection device according to claim 1, further comprising a cylinder member that moves to the surface. A plurality of air injection nozzles for injecting compressed air toward the outer surface of the workpiece to be fitted are arranged on the front surface in the traveling direction of the sensor ring, and the compressed air is disposed on the entire surface of the workpiece. The chip winding detection device according to claim 1, wherein the surface of the work after being sprayed over the circumference is searched.

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