JP2007167995A - Conveyer for chips and iron powder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a linear motor type conveyer, coping with the size of iron powder. <P>SOLUTION: In this conveyer for chips and iron powder, an iron core 11 of the iron powder conveyer forms a plurality of groove parts 111 and a core part 112 formed between the plurality of groove parts 111 along the conveying direction of iron powder, and a coil 13 is passed through the groove part 111. A three-phase alternating current is carried through windings of coils 13 passing through the plurality of groove parts 111 to form a synthetic magnetic field, and the synthetic magnetic field forms a mobile magnetic field moving with the passage of time. The core part 112 includes a drum part 113 and a head part 114, and the head part 114 is removably formed on the drum part 113. The length A in the conveying direction of the head part 114 is formed with dimension according to the size of the iron powder, and one selected head part 114 is mounted on the drum part 113 to vary an opening width B between the groove parts 111. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a chip / iron powder conveying device for discharging chips cut by a cutting machine or iron powder cut by a grinding machine from a tank.

  Chips, iron powder, and the like shaved by a molding machine such as a cutting machine or a grinding machine are collected in a tank by circulating cooling water. Since the cooling water in the tank is circulated, the chips and iron powder are usually separated and discharged so as not to contain chips and iron powder. Conventionally, as shown in FIGS. 11 to 12, the chip / iron powder separation / removal device 50 is performed using a so-called rotatable adsorption drum type oil separator 55. As shown in Patent Document 1, the oil separator 55 is provided with a large number of iron plates 57 along the peripheral wall of the suction drum 56, and is opposed to the inner surface position side of the peripheral surface of the suction drum 55. 58 is installed so that it can follow when the iron plate rotates. Further, an electromagnet 59 is installed on the other side of the suction drum 56 as a demagnetizing device for the iron plate 57.

  As shown in FIG. 12, the chip / iron powder separation / removal device 50 using the oil separator 55 divides the tank 51 into a chip / iron powder recovery unit 52 and a cooling water supply unit 53. The oil separator 55 is disposed on the chip / iron powder collecting unit 52 side. The chips and iron powder collected in the tank 51 together with the circulating cooling water from the molding machine 54 such as a cutting machine or a grinding machine are adsorbed to the adsorption drum 56 by the permanent magnet 58 by the oil separator 55, and at the chute site. It was discharged by being peeled off by hand.

As a result, the cooling water from which the chips and iron powder have been removed flows into the cooling water feeding unit 53, and the cooling water can be circulated from the tank 51 into the molding machine 54.
Japanese Patent Laid-Open No. 5-57211 (see pages 2-3 and FIG. 1)

  However, since the oil separator 55 described in Patent Document 1 uses a rare earth magnet, the oil separator 55 has a high magnetic force and has a complicated structure, which increases the cost. In addition, the chip / iron powder separation and removal device 50 using the oil separator 55 is configured to divide the tank 51 into two parts and to return the chip / iron powder from the cutting board 54 to the tank 51, and the tank 51. Since the pump 61 for sucking the inside chips and iron powder into the oil separator 55 is provided, the number of parts is increased and the cost is increased. Moreover, since the movable part is provided in the suction drum 56, it is necessary to perform maintenance, which is troublesome.

SUMMARY OF THE INVENTION The present invention solves the above-described problems, and provides a chip / iron powder conveying apparatus that is simple and inexpensive and can be performed maintenance-free. At the same time, this conveying device is configured to be able to cope with the size of chips and iron powder. Therefore, the device for conveying chips and iron powder according to the present invention,
According to the first aspect of the present invention, the groove formed perpendicularly to, or substantially perpendicular to, or inclined with respect to the conveying direction and the core formed between the grooves are conveyed while extending in the conveying direction of the chips and iron powder. A plurality of iron cores arranged side by side in the direction; a coil that is inserted into the groove and wound around the iron core; and a conveying surface that conveys the chips and iron powder, and the coils have alternating currents of different phases Is a chip / iron powder conveying device configured to be able to convey the chip / iron powder along the conveying surface by generating a moving magnetic field,
The length of the opening width of the groove formed along the conveying direction is variably formed.

  In the invention according to claim 2, the first winding, the second winding, or the third winding of the coil is inserted into the groove formed in the iron core in order along the conveying direction. It is characterized by being.

  According to a third aspect of the present invention, the core includes a body portion and a head portion that is wider than the body portion in the transport direction, and the head portion is detachable from the body portion. It is characterized by being.

  According to a fourth aspect of the present invention, the core includes a body portion and a head portion that is wider than the body portion in the transport direction, and the upper surface of the head portion is transported with respect to the body portion. It is characterized in that it can be expanded and contracted along the direction.

  The invention according to claim 5 is characterized in that the transport surface is formed on a member of a non-magnetic material, a weak magnetic material, or a thin steel plate.

  According to the present invention, the chip / iron powder conveying device generates a combined magnetic field by flowing alternating currents having different phases, for example, two-phase or three-phase alternating currents, through a coil wound around an iron core. Since the combined magnetic field forms a moving magnetic field that moves with time, the chips and iron powder that have moved to one end of the transfer surface are attracted and moved on the transfer surface by magnetic force. Discharged. Therefore, if one end of the transfer device is placed in, for example, a tank into which chips / iron powder circulated with cooling water is introduced and the other end is placed outside the tank, the chips / iron powder in the tank Can be discharged to the outside and feed cooling water into the machine. In this way, the chip / iron powder conveying device can be configured simply and inexpensively without using an expensive oil separator because it can convey chips and iron powder with a configuration of only an iron core, a coil and a conveying surface. it can. Moreover, since this transport device does not require maintenance of the oil separator, it does not take time.

  In addition, the size of the chips and iron powder cut by the molding machine changes depending on the cut material. In the case of this conveyor, the width of the groove formed in the iron core can be adjusted for chips and iron powders of different sizes, so even if there are variations in the size of the chips or iron powder, If the opening width of the groove is adjusted in accordance with the size of the chips and iron powder, the conveyance can be performed more smoothly.

  Further, according to the present invention, the first winding, the second winding, or the third winding that is inserted into the groove of the iron core has an alternating current having a different phase, for example, a two-phase or three-phase alternating current. As a result, the resultant magnetic field is generated by shifting the phase, and the resultant magnetic field forms a moving magnetic field that moves with time, so that the chips and iron powder are transported along the transport surface. This makes it possible to discharge the chips and iron powder to the outside with a simple structure.

  Furthermore, if the conveying surface for conveying the chips and iron powder is formed on the top surface of the nonmagnetic material arranged around the iron core, the chips and iron powder can be efficiently conveyed, For example, a weak magnetic material (for example, one having a magnetic permeability of 5500 or less) or a thin iron plate (for example, one having a thickness of 3.5 mm) may be used.

  Next, details of one form of the chip / iron powder conveying device will be described with reference to the drawings.

  FIG. 1 is a simplified drawing showing a chip / iron powder separating and conveying line 1, and a grinding machine will be described as an example of a molding machine. Since the chips generated by grinding with a grinding machine are mainly iron powder, the “chip / iron powder” will be described as “iron powder”, and the “chip / iron powder transfer device” and “chip” will be described below. The “iron powder separating and conveying line” is referred to as “iron powder conveying device 10” and “iron powder separating and conveying line 1”.

  The iron powder separating and conveying line 1 includes a grinding machine 3, a pump 5 for collecting iron powder generated by grinding the abrasive with the grinding machine 3 together with cooling water, a tank 7 for collecting iron powder and cooling water, The iron powder conveying device 10 for conveying and discharging the iron powder in the tank 7 to the outside, the recovery path 8 for connecting the grinding machine 3 and the tank 7 via the pump 5 and the cooling water only to the grinding machine 3 are fed. And a feeding route 9 to be provided.

  The iron powder conveying device 10 of the embodiment has one end arranged in the tank 7 and the other end arranged outside the tank 7 to separate the chips and iron powder in the tank 7 from the tank 7 and convey them outside the tank 7. Arrange as possible. Moreover, the iron powder conveying apparatus 10 is comprised by accommodating the iron core 11 which wound the coil 13 in the case body 15, as shown to FIGS. The iron core 11 is formed by laminating magnetic steel silicon steel plates or iron plates in the width direction of the iron core 11, and is disposed between the plurality of groove portions 111 and the groove portions 111 in the short direction perpendicular to the conveying direction. And a core portion 112. In addition, you may form this groove part 111 inclining substantially orthogonally or predetermined angle with respect to the conveyance direction of the iron core 11. As shown in FIG.

  A winding 131 of the coil 13 is inserted and wound around the groove 111 of the iron core 11. In the embodiment, a combined magnetic field is generated in the coil 13 by flowing a three-phase alternating current. That is, as shown in FIGS. 2 to 3, the grooves 111 a, 111 b, 111 c, 111 ′ a, 111 ′ b, 111 ′ c. Winding 131b, third winding 131c, first winding 131′a, second winding 131′b, third winding 131′c,...

  The first winding 131a is wound so as to pass through the first-order groove 111a and the second-order groove 111′a, and the second winding 131b is connected to the first-order groove 111b. The third winding 131c is wound so as to pass through the second-order groove 111'b, and the third winding 131c is wound so as to pass through the first-order groove 111c and the second-order groove 111'c. The Thereafter, similarly, each winding 131 is wound in turn.

  In the coil 13 wound in this way, as shown in FIG. 4, the first winding 131a is, for example, a three-phase alternating current U-phase coil 13U, and the first order groove 111a and the second order Winding 131′a (U-phase coil) that forms a closed loop between the winding 131a (U-phase coil 13U) that winds around the groove 111′a and forms a closed loop in the second and third orders 13U) are connected in series, and then connected in the same manner. The second winding 131b is, for example, a three-phase alternating current W-phase coil 13W, and the third winding 131c is, for example, a three-phase alternating current V-phase coil 13V, and is similar to the W-phase and V-phase. They are arranged sequentially.

  In addition, one U-phase coil 13U, one W-phase coil 13W, and one V-phase coil 13V are arranged in order from the right side in FIG. The coils of each phase in the adjacent coil sets 14 are arranged in order with the winding direction of the coil 13 in each phase reversed. Further, the winding start side in the U phase and the V phase in the coil set 14 of the terminal is connected to the power supply E side, and the winding end side in the W phase is connected to the power supply E side. Further, the leftmost coil set 14 is connected at a midpoint.

  As shown in FIG. 2, the iron core 11 around which the coil 13 is wound is inserted into a case body 15 formed in a rectangular tube shape to constitute the iron powder conveying device 10. The case body 15 is formed of a non-magnetic material having high electrical resistance, for example, stainless steel, and forms a surface located above the iron core 11 in FIG.

  The case body 15 may be a weak magnetic material or a thin iron plate as long as it is a magnetic material, in addition to a non-magnetic material. In the case of a weak magnetic material, the magnetic permeability may be in the range of 1.01 to 5500 (preferably 1.01 to 1000). For example, this range is obtained by grinding the surface of a stainless steel case body to obtain magnetism. Includes tingling.

  In addition, in the case of a thin plate-like iron plate, an experiment has shown that the chips can be conveyed without remaining if the thickness is 3.5 mm or less.

  Furthermore, the case body 15 may not be a rectangular tube shape but may be a flat plate.

  As shown in FIGS. 5 to 6, the core portion 112 of the iron core 11 is formed by separating the body portion 113 and the head portion 114. A horizontal groove 113 a is formed in the upper portion of the body portion 113 along both sides in the width direction of the core portion 112, and a head portion 114 is formed so as to be engageable with the horizontal groove 113 a of the body portion 113. Both upper surfaces 113b of the horizontal groove 113a in the body portion 113 have inclined surfaces 113c that extend upward in the illustrated example. The upper portion may be a vertical surface instead of an inclined surface.

  The head portion 114 has an engaging protrusion 114 a that engages with the horizontal groove 113 a of the body portion 113 and is formed in a downwardly open trapezoidal cylindrical shape so as to cover the upper surface 113 b of the body portion 113. The upper surface 114 b is formed such that the length A in the conveyance direction is wider than the thickness of the lower portion of the body portion 113. Therefore, the dimension between the groove parts 111 and 111 is formed so that the opening width B of the upper surface serving as the inlet of the coil 13 is narrower than the lower part of the groove part 111 into which the coil 13 is inserted.

  The size of the opening width B affects the iron powder transport efficiency depending on the size of the iron powder. When the magnetic flux flowing through the openings between the core portions 112 is short-circuited by the iron powder, the iron powder is adsorbed by the openings between the core portions 112. At this time, if the iron powder is larger than the opening width B, the iron powder is adsorbed at the opening and collected without being conveyed. Moreover, when iron powder is too smaller than opening width B, it will become difficult to convey iron powder.

  In the embodiment, various dimensions of the conveyance direction length A of the head 114 are prepared and can be replaced with the body 113. This makes the dimension of the opening width B variable, and selects the head 114 having an appropriate transport direction length A from among a variety of heads 114 depending on the size of the iron powder to be transported. Used.

  The shapes of the trunk portion 113 and the head portion 114 in the core portion 112 are not limited to the above forms. For example, as shown in FIG. 7, it may be a head piece 115 having a projection 115a that is flush with the upper surface of the body 113 and engages the horizontal groove 113a. A pair of the head pieces 115 may be formed symmetrically and engaged with the horizontal grooves 113a and 113a from the front surface and the rear surface of the body portion 113, respectively.

  Furthermore, as shown in FIG. 8, umbilical holes 113d may be formed on both surfaces of the trunk 113, and head pieces 116 having ant navels 116a engaged with the umbilical holes 113d may be fitted.

  Further, the head divided in two along the transport direction is moved up and down the adjustment member that forms the inclined surface at the intermediate portion and pressed by the inclined surface, so that the pair of heads can be expanded along the transport direction. It may be formed so that it can be contracted.

  Next, the operation of the iron powder conveying apparatus 10 configured as described above will be described.

  When a three-phase alternating current is passed through the coil 13, as shown in FIG. 5, the first winding 131a (U-phase coil 13U), the second winding 131b (W-phase coil 13W), and the third winding 131c. (V-phase coil 13V) draws sinusoidal waveforms that are 120 degrees out of phase. For example, if three positions that elapse with time t in FIG. 5 are selected and the respective positions are designated as time points P1, P2, and P3, the combined magnetic fields at time points P1, P2, and P3 are represented as shown in FIG. That is, since the maximum magnetic force at each time point P1, P2, and P3 is shifted, this becomes a moving magnetic field that moves with time, and the iron powder placed on the conveying surface 151 of the iron powder conveying apparatus 10 is conveyed. Become.

  The iron powder that transports the transport surface 151 sequentially passes through the core portion 112 and the groove portion 111 that are formed below the transport surface 151. If the workpiece to be conveyed is iron powder ground by a grinding machine, the iron powder is formed in fine particles, and therefore the opening width B of the groove 111 of the iron core 11 may be relatively small. In this case, the head 114 of the core 112 has a long conveying direction length A. Moreover, since the iron powder shaved with a drilling machine or a milling machine is formed relatively large, the opening width B may be formed wide. In this case, the head portion 114 of the core portion 112 has a short conveying direction length A. In the embodiment, since the molding machine 3 is a grinding machine, the opening width B is formed small.

  The iron powder smoothly transported on the transport surface 151 is dropped to an iron powder tray (not shown) disposed outside at the other end of the iron powder transport device 10.

  As described above, the iron powder transfer device 10 of the embodiment is formed by arranging the groove portion 111 side by side along the transfer direction in the elongated iron core 11, and applying a three-phase alternating current to the coil 13 inserted through the groove portion 111. Since a moving magnetic field can be generated by flowing, iron powder can be conveyed on the conveyance surface 151 formed of a nonmagnetic material. As a result, the iron powder can be separated and removed without using an expensive oil separator, so that an inexpensive and maintenance-free iron powder conveying apparatus 10 can be provided.

  Moreover, since the opening width B of the groove 111 formed in the iron core 11 can be made variable depending on the size of the iron powder, the iron powder can be smoothly conveyed regardless of the size of the iron powder. .

  The chip / iron powder conveying device of the present invention is not limited to the above-described embodiment. For example, the current flowing through the coil may be a two-phase AC current instead of a three-phase AC current. In this case, a two-phase alternating current can be created by inserting a capacitor into the single-phase alternating current.

  Furthermore, the case body of the non-magnetic material that forms the transport surface is not limited to a stainless steel material as long as it has a high electrical resistance.

  Further, the alternating current that flows through the coil may be other than the two-phase alternating current or the three-phase alternating current as long as the alternating current has a different phase.

It is a simplified perspective view showing an iron powder separation conveyance system of one form. It is a disassembled perspective view which shows a part of conveying apparatus in FIG. It is a partial cross section figure which shows the principal part of the iron powder conveying apparatus in FIG. It is a connection diagram which shows the winding state of the coil in FIG. It is a front view which shows the iron core in FIG. It is a perspective view which shows the structure of the iron core in FIG. It is sectional drawing which shows the structure of the iron core by another form. It is sectional drawing which shows the structure of the iron core by another form. It is a wave form diagram which shows the three-phase alternating current of the coil in FIG. It is a wave form diagram which shows the synthetic magnetic field in 3 positions in FIG. It is sectional drawing which shows the conventional oil separator. It is a simple perspective view which shows the conventional iron powder separation conveyance system which uses the oil separator of FIG.

Explanation of symbols

1. Iron powder separating and conveying line 3. Polishing machine (molding machine)
5, pump 7, tank 10, iron powder transfer device 11, iron core 111, groove 112, core 113, body 113a, horizontal groove 114, head 114a, engagement protrusion 13, coil 131, winding 15, Case body P1, time point P2, time point P3, time point E, power source A, conveyance direction length B, opening width

Claims (5)

Iron formed by extending in the conveying direction of chips and iron powder, and a plurality of grooves that are orthogonal, substantially orthogonal, or inclined with respect to the conveying direction and a plurality of cores formed between the grooves are arranged in parallel in the conveying direction. A core, a coil that is inserted into the groove and wound around the iron core, and a conveying surface that conveys the chips and iron powder, and generates a moving magnetic field by flowing alternating currents having different phases to the coil. A chip / iron powder conveying device configured to be able to convey the chip / iron powder along the conveying surface,
An apparatus for conveying chips and iron powder, wherein the length of the opening width of the groove formed along the conveying direction is variably formed.  The groove formed in the iron core has the first winding, the second winding, or the third winding of the coil inserted in order along the conveying direction. The chip / iron powder conveying apparatus according to 1.  The core has a body part and a head part that is wider than the body part in the transport direction, and the head part is detachably attached to the body part. The apparatus for conveying chips and iron powder according to claim 1 or 2.  The core has a body part and a head part that is wider than the body part in the transport direction, and the upper surface of the head part is formed so as to be expandable / contractable along the transport direction with respect to the body part. The apparatus for conveying chips and iron powder according to claim 1 or 2, wherein 2. The transport surface is formed of a non-magnetic material, a weak magnetic material, or a thin iron plate formed on a non-magnetic material, a weak magnetic material, or a thin steel plate member. , 2, 3 or 4 chip / iron powder conveying device.

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