JP6642464B2 - Work unloading device - Google Patents

Description

  The present invention relates to a work dispensing device, and more particularly, to a work dispensing device used for attaching and detaching a work on a lathe.

  Patent Literature 1 discloses a work dispensing jig for a turret lathe. The work dispensing jig of the turret lathe according to Patent Literature 1 includes a jig main body attached to a tool mounting portion of the turret, and a plurality of jig main bodies that are attached to the jig main body so as to be openable and closable and that sandwich a work of a spindle chuck in a hooked state. A work holding claw; and an elastic member that closes and biases the work holding claw. When the work of the spindle chuck is gripped by a plurality of work holding claws and the turret is moved in a direction away from the spindle, the work is pulled out of the spindle chuck.

JP-A-5-285777

  When a work is automatically installed on a lathe jig of an NC (Numerical Control) lathe using a device separate from the NC lathe and the work is automatically removed from the lathe jig, signals must be sent and received between the device and the NC lathe Becomes This may increase the cycle time.

  The present invention provides a work dispensing device capable of reducing a cycle time.

  A work dispensing device according to the present invention is a work dispensing device for performing attachment and detachment of a work on a lathe, wherein the turret, a work support member attached to a tool attachment surface of the turret, and the work support Detecting means for detecting whether or not the work has been performed, and when the detecting means detects that the work is supported by the work supporting member, the turret uses the work supporting member to rotate the lathe. Installing the work on a lathe jig, and detecting the work no longer supported by the work support member by the work being installed on the lathe jig; Outputs a start signal for instructing the control means of the lathe to start a processing program of the work, and the control means When the program has output an end signal indicating the end of the turret pays out the work from the lathe jig using said workpiece support member.

  ADVANTAGE OF THE INVENTION According to this invention, the work delivery apparatus which can shorten a cycle time can be provided.

FIG. 2 is a diagram showing a lathe provided with the work discharging device according to the first embodiment; FIG. 2 is a perspective view showing a work supporting member according to the first exemplary embodiment; FIG. 2 is a perspective view showing a work supporting member according to the first exemplary embodiment; FIG. 3 is a cross-sectional view illustrating details of a work detection unit according to the first exemplary embodiment; FIG. 3 is a cross-sectional view illustrating details of a work detection unit according to the first exemplary embodiment; 5 is a flowchart for explaining the operation of the work dispensing apparatus according to the first embodiment. It is a figure showing the state where a turret installs a work on a lathe jig. It is a figure showing the state where a turret pays out a work from a lathe jig.

(Embodiment 1)
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each of the drawings, the same elements are denoted by the same reference numerals, and repeated description is omitted as necessary.

  FIG. 1 is a diagram illustrating a lathe 1 provided with a work discharging device according to the first embodiment. The lathe 1 is an NC lathe. The lathe 1 includes a headstock 2, a spindle 4, a lathe jig 6 provided on the spindle 4, a jig 8 in a lathe facing the spindle 4, a turret 12, and a control device 100 for performing NC control. Have. The work 90 is installed on the main shaft 4 and processed.

  The turret 12 has a plurality of tool mounting surfaces 12a on which various tools are mounted. A work support member 20 capable of supporting the work 90 before processing and the work 90 after processing is mounted on one tool mounting surface 12a. Further, the work support member 20 is provided with a work detection unit 30 (detection means) for detecting whether or not the work 90 is supported by the work support member 20. The turret 12, the work support member 20, and the work detection unit 30 constitute the work delivery device 10. The work dispensing device 10 detaches (installs and dispenses) the work 90 on the lathe 1 as described later. Although not shown, a tool for processing the work 90 may be attached to the tool attachment surface 12a of the turret 12 to which the work support member 20 is not attached.

  The control device 100 (control means) is, for example, a computer. The control device 100 may include a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), a communication port, and the like as main hardware configurations. The control device 100 stores a machining program used for machining the work 90. The control device 100 controls the turret 12, the spindle 4, and the like according to the machining program. Further, as described later, the control device 100 can detect whether or not the work 90 is supported by the work support member 20 by receiving a signal from the work detection unit 30.

  2 and 3 are perspective views showing the work supporting member 20 according to the first embodiment. FIG. 2 shows a state in which the work 90 is not supported by the work support member 20, and FIG. 3 shows a state in which the work 90 is supported by the work support member 20.

  The work support member 20 has a turret mounting portion 22 for mounting the work support member 20 on the tool mounting surface 12a of the turret 12, and support plates 24 and 26 for supporting the work 90. The work 90 is placed on the support surfaces 24a, 26a of the support plates 24, 26. Thereby, as shown in FIG. 3, the work supporting member 20 supports the work 90. The work supporting member 20 has a load cell 28 that can measure the weight of the work 90. By measuring the weight of the work with the load cell 28, the type of the work 90 can be determined.

  The work detection unit 30 is attached to the support plate 24. The work detector 30 includes a plunger 32 and a work stopper 38. The plunger 32 is pressed by the work 90 when the work 90 is placed on the support surfaces 24a and 26a. The work stopper 38 regulates the position of the work 90 in the longitudinal direction (axial direction).

  4 and 5 are cross-sectional views illustrating details of the work detection unit 30 according to the first embodiment. FIG. 4 is a diagram illustrating a state in which the work 90 is not supported by the work support member 20, and FIG. 5 is a diagram illustrating a state in which the work 90 is supported by the work support member 20. The work detector 30 includes a plunger 32, an elastic member 34, a flow meter 36, a pressure sensor 37, and a work stopper 38. The plunger 32 is urged by an elastic member 34 so as to protrude outward (downward in FIGS. 4 and 5).

  Air G is supplied to the work detection unit 30 from an air supply port 30a. The air supply port 30a is connected to an air port of the turret 12, for example. Thereby, the air G can be supplied to the work detection unit 30 via the air supply port 30a. The work detection unit 30 includes a passage 31A and a passage 31B that are passages for the air G. The plunger 32 is located between the passage 31A and the passage 31B. The passage 31A is located on the air supply port 30a side, and the passage 31B is located on the flow meter 36 side. The flow meter 36 detects the flow rate of the air G passing through the passage 31B. The pressure sensor 37 detects the pressure of the air G passing through the passage 31B.

  As shown in FIG. 4, when the work 90 is not supported by the work supporting member 20, the plunger 32 projects outward by the urging force of the elastic member 34. At this time, the air G cannot be passed from the passage 31A to the passage 31B, as indicated by the arrow A, by the valve portion 32a provided in the plunger 32. That is, when the work 90 is not supported by the work support member 20, the valve portion 32a blocks the passage of the air G. At this time, since the fluid of the flow meter 36 hardly passes, the measured value of the flow meter 36 is substantially zero.

  On the other hand, as shown in FIG. 5, when the work 90 is supported by the work supporting member 20, the plunger 32 is pressed by the work 90. Thereby, the valve portion 32a moves upward in FIG. 5 against the urging force of the elastic member 34. Then, as shown by an arrow B in FIG. 5, the air G can pass from the passage 31A to the passage 31B via the through hole 32b provided in the plunger 32. As a result, the air G is released from the work detection unit 30 to the outside via the flow meter 36. At this time, the measurement value of the flow meter 36 increases due to the passage of the air G. By increasing the measurement value of the flow meter 36, the work detection unit 30 can detect that the work 90 is supported by the work support member 20.

  FIG. 6 is a flowchart for explaining the operation of the work dispensing apparatus 10 according to the first embodiment. First, as shown in FIG. 2, the worker places the work 90 on the work support member 20 (step S102). Thereby, as shown in FIG. 5, the plunger 32 is pressed against the work 90 (step S104). Then, as described above, the air G is released to the outside, and the work detection unit 30 determines that the work 90 is supported by the work support member 20 when the measurement value of the flow meter 36 exceeds a predetermined threshold. (The work 90 is present on the work support member 20) is detected (step S106).

  When detecting that the work 90 is supported by the work support member 20, the turret 12 sets the work 90 on the lathe jig 6 using the work support member 20 (step S108). Specifically, when detecting that the work 90 is supported by the work support member 20, the work detection unit 30 outputs a work presence signal to the control device 100.

  FIG. 7 is a diagram illustrating a state in which the turret 12 places the work 90 on the lathe jig 6. When receiving the work presence signal from the work detection unit, the control device 100 controls the turret 12 so that the work 90 is set on the lathe jig 6 as shown by an arrow C in FIG. The operation of the turret 12 is programmed in advance. That is, the workpiece 90 is positioned in the control device 100 so as to be installed on the lathe jig 6.

  When the work 90 is set on the lathe jig 6, the work 90 is separated from the work support member 20, so that the plunger 32 is protruded by the urging force of the elastic member 34 (step S110). As a result, as shown in FIG. 4, the air G is shut off by the valve portion 32a, and the measured value of the flow meter 36 decreases below a predetermined threshold. Thereby, the work detection unit 30 detects that the work 90 is no longer supported by the work support member 20, that is, detects that the work 90 has been removed from the work support member 20 (step S112).

  At this time, the work detection unit 30 outputs a machining start signal instructing to start the machining program to the control device 100 (Step S114). When receiving the machining start signal, the control device 100 starts the machining program. Thereby, the work 90 is processed by the lathe 1.

  When the processing of the work 90 is completed, that is, when the processing program is completed, the control device 100 outputs a processing end signal indicating that the processing program is completed (step S120). At this time, the turret 12 starts paying out (removing) the work 90 from the lathe jig 6 using the work support member 20 (step S122).

  FIG. 8 is a diagram illustrating a state in which the turret 12 pays out the work 90 from the lathe jig 6. When the control device 100 outputs a processing end signal, the turret 12 approaches the work 90 installed on the lathe jig 6 as shown by an arrow D in FIG. 8 and moves to the work support member 20 as shown in FIG. The work 90 is placed.

  When the work 90 rides on the work support member 20 and is supported by the work support member 20, the plunger 32 is pressed against the work 90 as shown in FIG. 5 as in the step of S104 (step S124). Therefore, similarly to the step of S106, the air G is released to the outside, and the work detection unit 30 determines that the work 90 is supported by the work support member 20 based on the measurement value of the flow meter 36 (the work 90 is 20) (step S126).

  When it is detected that the work 90 is supported by the work support member 20, the turret 12 is retracted while the work 90 is supported by the work support member 20 (step S128). Specifically, when detecting that the work 90 is supported by the work support member 20, the work detection unit 30 outputs a work presence signal to the control device 100. When receiving the work presence signal from the work detection unit, the control device 100 controls the turret 12 to retreat from the lathe jig 6 as shown by an arrow E in FIG. The operation of the turret 12 is programmed in advance. That is, the workpiece 90 is positioned in the control device 100 so as to be installed on the lathe jig 6. The work 90 is paid out from the lathe jig 6 as described above.

  As described above, the work dispensing apparatus 10 according to the first embodiment can install the work 90 on the lathe jig 6 and discharge the work 90 from the lathe jig 6 by operating only the turret 12. Thereby, the work dispensing apparatus 10 according to the first embodiment can install the work 90 on the lathe jig 6 and discharge the work 90 from the lathe jig 6 only under the control of the control device 100 that performs the NC control. it can. Therefore, signal exchange is completed only inside the lathe 1 which is an NC lathe. This eliminates the need for a sequencer such as a PLC (programmable logic controller) outside the NC lathe to control the work dispensing device.

  Here, if the sequencer outside the NC lathe controls the work dispensing device, it is necessary to exchange control signals between the NC lathe, the sequencer, and the actuator that operates the work dispensing device. For example, the NC lathe outputs a machining end signal to the sequencer, and the sequencer outputs a control signal to the actuator. Then, the sequencer receives the signal of the sensor of the actuator, and further controls the actuator. When such control is performed, the cycle time may increase due to the exchange of a large number of signals.

  On the other hand, the work dispensing device 10 according to the present embodiment installs the work 90 on the lathe jig 6 and exchanges the work 90 from the lathe jig without exchanging signals with a sequencer outside the NC lathe. be able to. In other words, the work dispensing device 10 according to the present embodiment is controlled using the control device 100 of the lathe 1, not the sequencer outside the lathe 1. Therefore, the work dispensing apparatus 10 according to the present embodiment can reduce the cycle time.

(Modification)
It should be noted that the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist. For example, the work detection unit 30 may output a work presence signal and a processing start signal to the control device 100 via the turret 12. The operation of the turret 12 may be programmed in a control program including a machining program.

DESCRIPTION OF SYMBOLS 1 Lathe 4 Spindle 6 Lathe jig 10 Work dispensing device 12 Turret 12a Tool mounting surface 20 Work support member 22 Turret mounting portion 30 Work detection unit 30a Air supply port 31A Passage 31B Passage 32 Plunger 32a Valve 32b Through hole 34 Elastic member 36 Flow meter 90 Work 100 Control device

Claims (1)

A work dispensing device for attaching and detaching a work on a lathe,
Turret,
A work support member attached to a tool attachment surface of the turret,
Detecting means for detecting whether the work is supported by the work supporting member, and
When the detecting means detects that the work is supported by the work support member, the turret installs the work on a lathe jig of the lathe using the work support member,
When the detecting means detects that the work is no longer supported by the work supporting member by installing the work on the lathe jig, the detecting means is configured to control the lathe with respect to the control means. Outputs a start signal instructing to start the machining program of the work,
When the control means outputs an end signal indicating that the machining program has ended, the turret pays out the work from the lathe jig using the work support member.

Images