Bar stock feeding machine waste material discharge device

Abstract

To provide a residual material discharge device which can discharge a residual material reliably and stably and enables smooth continuous operation of a rod supply machine.SOLUTION: A residual material discharge device of a rod supply machine is disposed at the rod supply machine, discharges a residual material of the rod, and has: a residual material support part having a holding part for holding the residual material and groove parts formed along a radial direction of the residual material on an inner wall surface of the holding part; and residual material discharge parts each of which is disposed so as to protrude into the holding part through the groove part and retract from the holding part.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a residual material discharge device for a bar feeder that discharges a bar material of the bar feeder.

Background Art

[0002] A bar feeder grips an elongated bar material and continuously feeds it to a processing machine such as an automatic lathe, and rotatably supports the bar material while the processing machine is in operation. The processing machine grips and rotates the bar material by its main spindle, and cuts the bar material with a cutting tool.

[0003] In this bar feeder, since the end of the bar material is gripped by a finger chuck, the entire length of the bar material cannot be machined, which results in residual material including the gripping allowance. Therefore, in order to discharge such residual material out of the bar feeder, the bar feeder is provided with a residual material discharge device for removing the residual material from the finger chuck.

[0004] Various forms of such residual material discharge devices are known. For example, the residual material discharge device described in Patent Document 1 includes a main support rail that supports the bar material gripped by the finger chuck of a feed rod and guides the bar material to the processing machine, a sub support rail that is provided in a residual material drop space on the rear end side of the main support rail so as to be vertically rotatable, and a clamping unit that clamps the residual material when extracting the residual material from the finger chuck.

[0005] With this configuration, the feed rod is supported by a main support rail that guides the rod held by the finger chuck to the processing machine, a sub-support rail that is rotatable vertically within the material drop space at the rear end of the main support rail, and a clamping means that clamps the material when it is removed from the finger chuck. As a result, the rod rotates stably even within the material drop space because it is supported by the sub-support rail, vibration is reduced, and processing accuracy is improved. Furthermore, because the drop space is covered by the sub-support rail, even if the rod or parts are damaged they will not fly out, and conversely, the operator will not come into contact with the rotating rod, etc., thus improving safety.

[0006] Furthermore, the waste material discharge device described in Patent Document 2 includes a waste material passage detection device that detects the passage of waste material, and a waste material removal device that removes waste material that has been stopped by the waste material passage detection device.

[0007] With this configuration, the waste material removal device reliably discharges waste material that has been stopped by the waste material passage detection device, thus preventing waste material discharge errors and enabling smooth continuous operation. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Patent No. 3830221 [Patent Document 2] Patent No. 5437139 [Overview of the project] [Problems that the invention aims to solve]

[0009] However, according to the waste material discharge devices described in Patent Documents 1 and 2, the waste material is collected in a waste material collection box installed in the drop space by natural fall and discharged outside the rod material supply machine. However, there was an unstable element in that the discharged waste material may tilt, making it impossible to reliably drop it into the waste material collection box.

[0010] The present invention aims to solve these problems and provide a waste material discharge device that enables reliable and stable waste material discharge and smooth continuous operation of a bar material feeding machine. [Means for solving the problem]

[0011] To solve the above problems, the present invention provides a residual material discharge device for a bar material feeder, which is arranged in a bar material feeder and discharges residual bar material, comprising: a holding portion for holding the residual material; a residual material support portion having a groove formed on the inner wall surface of the holding portion along the radial direction of the residual material; and a residual material discharge portion being arranged to be retractable into and out of the groove into the holding portion. The groove portion is formed as a through groove that penetrates from the inner wall surface to the outer wall surface of the holding portion, the residual material support portion is rotatably arranged around a pivot substantially parallel to the axial direction of the residual material, and the residual material discharge portion includes a residual material discharge plate that can be inserted into the groove portion by the rotation of the residual material support portion. It is characterized by the following. [Effects of the Invention]

[0018] According to the present invention, the material supply unit has a retaining portion for holding the material, a groove formed on the inner wall surface of the retaining portion along the radial direction of the material, and a material discharge portion that is positioned to extend and retract from the groove into the retaining portion. Therefore, the material placed on the material supply unit can be reliably discharged outside the material supply unit by the material discharge portion that protrudes from the groove into the groove. [Brief explanation of the drawing]

[0019] [Figure 1] A side view of a bar material supply machine equipped with a waste material discharge device according to the first embodiment of the present invention. [Figure 2] A front view of a rod support device equipped with a waste material discharge device according to the first embodiment of the present invention. [Figure 3]A plan view of the residual material discharge device according to the first embodiment of the present invention. [Figure 4] A side view of the residual material discharge device according to the first embodiment of the present invention. [Figure 5] A cross-sectional view taken along line P-P in Figure 4. [Figure 6] A cross-sectional view for explaining the operation of the residual material discharge device according to the first embodiment of the present invention. [Figure 7] A cross-sectional view for explaining the operation of the residual material discharge device according to the first embodiment of the present invention. [Figure 8] A cross-sectional view of the residual material discharge device according to the second embodiment of the present invention. [Figure 9] A cross-sectional view for explaining the operation of the residual material discharge device according to the second embodiment of the present invention. [Figure 10] A cross-sectional view of the residual material discharge device according to the third embodiment of the present invention. [Figure 11] A cross-sectional view for explaining the operation of the residual material discharge device according to the third embodiment of the present invention. [Modes for Carrying Out the Invention]

[0020] [First Embodiment] Hereinafter, preferred embodiments for carrying out the present invention will be described with reference to the drawings. Note that the following embodiments do not limit the invention according to each claim, and not all combinations of features described in the embodiments are necessarily essential to the solution means of the invention.

[0021] Figure 1 is a side view of a bar feeder provided with the residual material discharge device according to the first embodiment of the present invention, Figure 2 is a front view of a bar support device provided with the residual material discharge device according to the first embodiment of the present invention, Figure 3 is a plan view of the residual material discharge device according to the first embodiment of the present invention, Figure 4 is a side view of the residual material discharge device according to the first embodiment of the present invention, Figure 5 is a cross-sectional view taken along line P-P in Figure 4, Figure 6 is a cross-sectional view for explaining the operation of the residual material discharge device according to the first embodiment of the present invention, and Figure 7 is a cross-sectional view for explaining the operation of the residual material discharge device according to the first embodiment of the present invention.

[0022] As shown in Figure 1 and Figure 2, the residual material discharge device 20 of the bar feeder 1 according to the present embodiment is a device that supplies materials such as bars to a material processing machine such as a lathe (not shown as an example), and is arranged adjacent to the material processing machine. As shown in Figure 1, the residual material discharge device 20 is installed inside the bar feeder 1, and includes a finger chuck 12 attached to the tip of the feed rod 11 and configured to grip the bar 13, a clamping means 9 for pulling out the residual material 13a of the machined bar 13 from the finger chuck 12, a support rail 7 extending in the supply direction of the bar 13, and a residual material support portion 8 for holding the residual material 13a pulled out from the finger chuck 12, and is fixed to the frame 10.

[0023] The feed rod 11 is provided inside the bar feeder so as to be reciprocally movable in the front-rear direction. Specifically, it is connected to an endless chain (not shown) driven by a motor disposed inside the bar feeder, and is configured to move forward and backward in the bar feeder by the reciprocating drive of the endless chain.

[0024] The finger chuck 12 is rotatably attached to the tip of the feed rod 11 via a bearing or the like, and is configured to grip the rear end of the bar 13 by its elastic expansion deformation. The finger chuck 12 moves inside the bar feeder together with the feed rod 11, and when the gripped bar 13 rotates along with the rotation of the main shaft of the processing machine, the finger chuck 12 rotates together with the bar 13 at the tip of the feed rod 11.

[0025] The processing machine is, for example, an automatic lathe, and is disposed in front of the bar feeder such that the central axis of its main shaft coincides with the extension line of the central axes of the finger chuck 12 and the bar 13 gripped by the finger chuck 12.

[0026] The support rail 7 is a guide rail for guiding the bar 13 having a substantially semicircular concave groove in cross section, and is horizontally fixed on the frame 10 of the bar feeder. The bar 13 gripped by the finger chuck 12 moves along the concave groove of the support rail 7.

[0027] The leftover material support section 8 has a similar shape to the support rail 7 but is a shorter rail, and is positioned to be continuous with the support rail 7 within the leftover material discharge hole 21 of the leftover material 13a at the rear end of the support rail 7. Furthermore, as shown in Figures 3 to 5, the leftover material support section 8 has a holding section 14 that corresponds to the groove shape of the support rail 7, and a groove 15 is formed on the inner wall surface of the holding section 14 as a through hole that penetrates the holding section 14 from the inner wall surface to the outer wall surface. In addition, a notch 16 is formed at the end of the leftover material support section 8 on the finger chuck 12 side, and the leftover material 13a can be removed from the finger chuck 12 by inserting the clamping means 9 into the notch 16.

[0028] The leftover material support section is mounted on the frame 10 via a pivot 17 parallel to the longitudinal direction of the leftover material support section 8, and is rotatable in the vertical direction by a leftover material support section operating lever 18 attached to the pivot 17. Between the leftover material support section 8 and the frame 10, an air cylinder (not shown) is arranged via a bracket and pin in a direction perpendicular to their longitudinal direction.

[0029] The clamping means 9 is positioned behind the leftover material support section 8 and is composed of two claws that clamp the rod 13 from both sides. The pair of clamping means 9, 9 can be positioned to move closer together and further apart by various conventionally known methods. When the pair of clamping means 9, 9 move closer together, they grip the leftover material 13a, and when they move further apart, they drop the gripped leftover material 13a into the holding section 14 of the leftover material support section 8.

[0030] Furthermore, the frame 10 is fitted with a waste material discharge section 19 that protrudes toward the groove 15 of the waste material support section 8. The waste material discharge section 19 is formed by being erected at a corresponding position in the groove 15. The waste material discharge section 19 comprises a base 19a attached to the frame 10 and a waste material discharge plate 19b that protrudes diagonally upward from the base 19a and whose tip is inclined toward the waste material discharge hole 21.

[0031] The waste material discharge sections 19 are arranged at predetermined intervals along the direction of the main shaft, for example, with smaller spacing at the end on the finger chuck 12 side and larger spacing towards the end on the support rail 7 side.

[0032] Next, we will explain the operation of the waste material discharge device 20 of this bar material feeder 1.

[0033] First, when supplying a new bar 13 to the bar feeder, a rail cover (not shown) rotates upward to open the groove and holding section 14 of the support rail 7 and the leftover material support section 8. The new bar 13 rolls into the groove and holding section 14 by a bar feeding device (not shown) which is positioned parallel to the support rail 7 and the leftover material support section 8. A push rod (not shown) then pushes the bar 13 so that its rear end is at the position of the notch 16, and a clamping means 9 moves into the notch 16 to grasp the rear end of the bar 13. The feed rod 11 moves forward toward the rear end of the bar 13 and grips the rear end with a finger chuck 12. The feed rod 11 then moves further forward, feeding the bar 13 toward the spindle of the processing machine. The rod 13 rotates along with the rotation of the spindle of the processing machine. In this invention, a leftover material support section 8 is connected to the rear of the support rail 7, and the leftover material 13a is supported by the leftover material support section 8 even within the space where the leftover material falls, so the rod 13 rotates stably.

[0034] When the processing of one bar material 13 by the processing machine is completed, and the remaining material 13a and the finger chuck 12 retract to the rear of the remaining material support section 8 together with the feed rod 11, the clamping means 9 grips and fixes the remaining material 13a.

[0035] Next, when the feed rod 11 retracts by a predetermined length to the position shown by the solid line in Figure 1, the remaining material 13a is released from the finger chuck 12. Then, the clamping means 9 releases the remaining material 13a, and as shown in Figure 5, it falls and is placed on the holding part 14 of the remaining material support part 8. Next, as shown in Figure 6, when the remaining material support part 8 rotates, the remaining material 13a moves together with the remaining material support part 8. At this time, the remaining material discharge plate 19b passes through the groove 15 formed in the remaining material support part 8 and comes into contact with the remaining material 13a. In this way, the remaining material discharge plate 19b is positioned to be able to move in and out of the groove 15 of the remaining material support part 8 and into the holding part 14 as the remaining material support part 8 rotates.

[0036] Furthermore, when the waste material support section 8 rotates, it moves to the position shown in Figure 7. At this time, the waste material 13a is pushed out of the holding section 14 by the waste material discharge plate 19b, moves along the internal shape of the holding section 14 to the edge of the holding section 14, and is pushed out of the holding section 14 of the waste material support section 8 along the slope of the tip of the waste material discharge plate 19b. Since the tip of the waste material discharge plate 19b is inclined toward the waste material discharge hole 21, the waste material 13a is reliably discharged into the waste material discharge hole 21.

[0037] As described above, the residue discharge device 20 of the bar material feeder 1 according to this embodiment discharges the residue material 13a toward the residue material discharge hole 21 by the residue material discharge plate 19b through the rotation of the residue material support section 8. Therefore, it is possible to reliably and stably discharge the residue material 13a without being affected by the shape, length, or mass of the residue material 13a.

[0038] [Second Embodiment] In the residual material discharge device 20 of the rod material feeder 1 according to the first embodiment described above, the residual material support part 8 rotates around the pivot 17, causing the residual material discharge plate 19b to pass through the groove 15 formed in the residual material support part 8, thereby discharging the residual material 13a held in the holding part 14 to the outside of the holding part 14. The residual material discharge device of the rod material feeder according to the second embodiment described next describes an embodiment of a fixing means having a different form from the residual material discharge device of the rod material feeder according to the first embodiment. Note that components that are the same or similar as those in the first embodiment described above are denoted by the same reference numerals and their description is omitted.

[0039] Figure 8 is a cross-sectional view of a waste material discharge device according to a second embodiment of the present invention, and Figure 9 is a cross-sectional view illustrating the operation of the waste material discharge device according to a second embodiment of the present invention.

[0040] As shown in Figure 8, the waste material discharge device 20a of the bar material feeder according to this embodiment has a waste material support section 8 having a holding section 14 and a groove section 15, similar to the waste material discharge device 20 of the bar material feeder according to the first embodiment. The waste material support section 8 is attached to the frame 10 via a fixed shaft 17a.

[0041] The waste material discharge section 19' is mounted to be vertically movable by a means of transport (not shown) and has a waste material discharge plate 19c positioned to be insertable into the groove 15 at a location corresponding to the groove 15. The upper end of the waste material discharge plate 19c has an inclined surface 19d that slopes toward the waste material discharge hole 21.

[0042] As shown in Figure 8, the leftover material discharge device 20a of the bar material supply machine according to this embodiment, configured in this way, removes the leftover material 13a from the finger chuck 12 using the clamping means 9 and places the leftover material 13a on the holding part 14 of the leftover material support part 8.

[0043] Next, the waste material discharge plate 19c rises toward the waste material support section 8 and passes through the groove 15 of the waste material support section 8. At this time, the waste material 13a placed on the waste material support section 8 moves toward the edge of the waste material support section 8 along the inner circumference of the holding section 14 and the inclined surface 19d of the waste material discharge plate 19c, as shown in Figure 9.

[0044] Subsequently, as the waste material discharge plate 19c rises further, the waste material 13a falls along the inclined surface 19d at the tip of the waste material discharge plate 19c and is discharged into the waste material discharge hole 21. At this time, since multiple waste material discharge plates 19c are formed along the direction of the main axis, it is possible to discharge the waste material towards the waste material discharge hole 21 while maintaining a horizontal position.

[0045] [Third Embodiment] In the residual material discharge devices 20 and 20a of the rod material feeder 1 according to the first and second embodiments described above, the case in which a groove 15 is formed in the residual material support portion 8 that penetrates from the inner circumference to the outer circumference of the holding portion 14 has been described. The residual material discharge device of the rod material feeder according to the third embodiment described next describes an embodiment of a fixing means that has a different form from the residual material discharge devices of the rod material feeder according to the first and second embodiments. Note that components that are the same or similar as those in the first and second embodiments described above are denoted by the same reference numerals and their description is omitted.

[0046] Figure 10 is a cross-sectional view of a waste material discharge device according to a third embodiment of the present invention, and Figure 11 is a cross-sectional view illustrating the operation of the waste material discharge device according to the third embodiment of the present invention.

[0047] As shown in Figure 10, the residue discharge device 20b of the bar material feeder according to this embodiment has a residue support section 8a having a holding section 14, similar to the residue discharge device 20a of the bar material feeder according to the second embodiment. Furthermore, unlike the residue discharge devices 20 and 20a of the bar material feeder according to the first and second embodiments, the residue support section 8a has a bottomed groove section 15a. The residue support section 8a is attached to the frame 10 via a fixed shaft 17a.

[0048] The waste material discharge section 19'' has a waste material discharge plate 19e positioned within the groove 15a so as not to protrude from the inner wall surface of the holding section 14. The waste material discharge plate 19e is mounted so as to be rotatable around the pivot axis 22 and is positioned so as to be able to move in and out from the inside of the groove 15a towards the inside of the holding section 14.

[0049] The waste material discharge plate 19e has multiple bent portions 19f, and in the waste material discharge device 20b of the bar material supply machine according to this embodiment, there are three bent portions 19f. By having multiple bent portions 19f in this way, when the waste material discharge plate 19e is placed in the groove portion 15a, it can be positioned without protruding into the inside of the holding portion 14.

[0050] Furthermore, the waste material discharge plate 19e is not limited to having a shape with multiple bent portions 19f, and may have any shape as long as it does not protrude from the inner wall surface of the holding portion 14 when placed in the groove portion 15a. For example, the waste material discharge plate 19e may have an R shape that is curved in the same direction as the curvature of the inner wall surface of the holding portion 14.

[0051] As shown in Figure 10, the leftover material discharge device 20b of the bar material supply machine according to this embodiment removes the leftover material 13a from the finger chuck 12 using the clamping means 9 and places the leftover material 13a on the holding part 14 of the leftover material support part 8a.

[0052] Next, the waste material discharge plate 19e, which is positioned in the groove 15a of the fixed waste material support part 8a, is rotated to the inside of the holding part 14 of the waste material support part 8a. At this time, the waste material 13a moves along the folded shape of the waste material discharge plate 19e and detaches from the waste material support part 8a, as shown in Figure 11.

[0053] Subsequently, when the waste material discharge plate 19e is rotated further, the waste material 13a is discharged into the waste material discharge hole 21 while maintaining a horizontal position.

[0054] In the residual material discharge devices 20, 20a, and 20b of the bar material feeder according to the above embodiment, the grooves 15 and 15a formed in the residual material support sections 8 and 8a are arranged at predetermined intervals along the direction of the main axis. For example, the description has been given as an arrangement where the spacing is smaller at the end on the finger chuck 12 side and increases towards the end on the support rail side. However, the spacing and number of grooves 15 and 15a may be changed as appropriate. It is clear from the description of the claims that such modified or improved forms may also be included in the technical scope of the present invention. [Explanation of Symbols]

[0055] 1 bar material feeder, 7 support rail, 8, 8a leftover material support section, 9 clamping means, 10 frame, 11 feed rod, 12 finger chuck, 13 bar material, 13a leftover material, 14 holding section, 15, 15a groove section, 16 notch section, 17 pivot, 18 leftover material support section operating lever, 19, 19', 19'' leftover material discharge section, 19b, 19c, 19e leftover material discharge plate, 20, 20a, 20b leftover material discharge device, 21 leftover material discharge hole, 22 pivot shaft.

Claims

[Claim 1] A bar material discharge device for a bar material feeder, which is positioned in the bar material feeder and discharges the remaining bar material, A retaining portion for holding the retaining material, and a retaining portion formed on the inner wall surface of the retaining portion along the radial direction of the retaining material, It has a residual material discharge section that is positioned to be able to move in and out of the groove and into the holding section, The groove is formed as a through groove that penetrates from the inner wall surface to the outer wall surface of the retaining portion. The remaining material support section is rotatably arranged around a pivot that is substantially parallel to the axial direction of the remaining material. The residue discharge device for a bar material supply machine is characterized in that the residue discharge section comprises a residue discharge plate that can be inserted into the groove by the rotation of the residue support section.

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