Die-casting product removal device

Abstract

To simplify a mechanism for separating and removing a product portion from a runner portion after breaking and removing an overflow portion in a die-cast product, thereby facilitating maintenance. [Solution] A product removal device for die-cast products, which removes a product portion G from a die-cast product M, comprises a robot arm 1 which grasps the biscuit portion B of the die-cast product M and moves and transports the die-cast product M, and a product removal device 20 which removes the product portion G from the die-cast product M from which the overflow portion has been broken off and removed. The product removal device 20 comprises a clamping jig 25 which supports the die-cast product M by clamping the runner portion R of the die-cast product M when the die-cast product M from which the overflow portion has been broken off and removed is brought by the robot arm 1 and the product portion G is positioned at the position of the removal hammer 31, and the product removal device 20 comprises the removal hammer 31 which strikes and drops the positioned suspended product portion G.

Description

[Technical field]

[0001] The present invention relates to a product removal device for a die-cast product, which separates and removes a product portion from a runner portion after breaking and removing an overflow portion in the die-cast product. [Background technology]

[0002] Conventionally, die-cast products are produced by forcing molten metal into a mold, and are cast with a biscuit part at the forcing point, a runner part connected to the product part, and an overflow part to the outside of the product part. After casting, it is necessary to separate and remove the biscuit part, runner part, and overflow part, which are parts other than the product part, from the product part to extract only the product part.

[0003] For this reason, a die-casting machine cleavage device shown in Patent Document 1, an automatic breakage device shown in Patent Document 2, and an automatic breakage machine for the runner part of a die-casting product shown in Patent Document 3 have been proposed. The cleavage device of Patent Document 1 fixes the biscuit part of the die-casting product with a casting clamp, and breaks off the inflow part and the overflow part by controlling the positioning of a hammer for breaking the inflow part and a hammer for breaking the overflow part in a plane using two motors. The automatic breakage device of Patent Document 2 fixes the die-casting product with a product fixing mechanism, and breaks off unnecessary parts by hitting down the hammer part of the breakage mechanism whose movement is controlled in the XY directions, and absorbs the vibration caused when the hammer part is hit down. The automatic breakage machine of Patent Document 3 hits and breaks the runner part by moving a cleavage runner unit arranged on a running frame that runs back and forth and left and right with another vibration isolator interposed between the die-casting product fixed and supported via a vibration isolator up and down while attenuating mechanical vibration and noise. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2010-167482 A [Patent Document 2] JP 2006-334631 A [Patent Document 3] Utility Model Registration No. 3036141 Summary of the Invention [Problem to be solved by the invention]

[0005] In the conventional breaking devices described above, the die-cast product is fixed and the unnecessary part is struck to break and separate the product part from the unnecessary part, but when striking, vibrations and other effects caused by the strike are transmitted as shocks to the clamping mechanism that fixes the casting product and to the cylinder for the hammer mechanism that strikes, which may damage both the clamping mechanism and the cylinder. Therefore, it is necessary to provide a shock absorbing means to absorb the shock, which inevitably makes the device itself complicated.

[0006] In addition, by fixing the die casting, the hammer mechanism that strikes the unnecessary parts is controlled to correspond to each unnecessary part and positioned in the XY direction on a plane. This requires different adjustments and changes to the positioning control for each unnecessary part in various different die castings, which is extremely troublesome.

[0007] The present invention has been devised in consideration of the various problems that have existed in the past as described above, and aims to provide a product removal device for die-cast products, which can be provided inexpensively as a simplified device, in which a die-cast product after casting is held by a robot arm that operates in three dimensions and fixedly supported by a clamping jig, and the product portion is struck and dropped by an extraction hammer while in this supported state, without the need for a position control mechanism for the extraction hammer or an anti-vibration mechanism. [Means for solving the problem]

[0008] In order to solve the above-mentioned problems, the present invention provides a product removal device for die-cast products that removes a product portion G from a cast die-cast product M, comprising a robot arm 1 that grasps the biscuit portion B of the die-cast product M and moves and transports the die-cast product M, and a product removal device 20 that removes the product portion G from the die-cast product M from which the overflow portion F has been broken off and removed. The product removal device 20 is characterized in that it comprises a clamping jig 25 that supports the die-cast product M by clamping the runner portion R of the die-cast product M so that the product portion G is suspended in mid-air and supports the die-cast product M when the die-cast product M from which the overflow portion F has been broken off and removed is brought by the robot arm 1 and the product portion G is positioned at the position of the removal hammer 31, and the product removal device 20 comprises: In the product removal device 20, the clamping jig 25 is fixed on a receiving stand 23 provided on a structured machine frame 21 so that its position can be adjusted freely, and the removal hammer 31 can be configured to be movable up and down by a cylinder 32 provided on the machine frame 21. The clamping jig 25 is formed in a groove shape in cross section into which the runner part R is forcibly clamped, and can be configured so that its position can be adjusted on the receiving stand 23 corresponding to the removal position of the product part G. An overflow breaking device 10 that breaks and removes the overflow portion F is provided, and this overflow breaking device 10 is arranged within a structured machine frame 11, and can be configured to include a die-casting hammer 13 that breaks off the overflow portion F in the die-casting product M supported in a state in which the overflow portion F of the die-casting product M moved and transported by the robot arm 1 is positioned three-dimensionally.

[0009] In the product removal device for die-cast products according to the present invention, which is configured as described above, the biscuit portion B of the die-cast product M is grasped by the three-dimensionally operating robot arm 1, and its runner portion R is fixed and supported within the clamping jig 25 to leave the product portion G suspended in mid-air. The suspended product portion G is then struck and dropped by the removal hammer 31; it is sufficient to position the product portion G at the position of the removal hammer 31; the impact of the strike by the removal hammer 31 is received by the clamping jig 25 and is not transmitted to the robot arm 1. While holding the die-cast product M removed from the product removal section of the die-casting machine D, the robot arm 1 causes the overflow portion F to be broken and removed by the breaker hammer 13 in the overflow breaking device 10, and in the product removal device 20, with the product portion G positioned at the position of the removal hammer 31, the runner portion R is clamped by the clamping jig 25 and the product portion G is struck and dropped. In this way, the series of operations from removing the die-cast product M from the die-casting machine M to removing the product portion G thereafter are continuously performed. In the product removal device 20, the clamping jig 25 is fixed on the receiving table 23 so that its position can be adjusted freely, and when it is brought by the robot arm 1, the position of the product portion G of the die-cast product M is adjusted to match the position of the removal hammer 31. Therefore, there is no need to control the movement of the removal hammer 31 so that it corresponds to the position of the product portion G, simplifying the device and making its maintenance unnecessary. The clamping jig 25 is moved and transported by the robot arm 1, and the die-cast product M from which the overflow portion F has been broken off and removed is clamped by the runner portion R, so that the product portion G is suspended in mid-air and the die-cast product M is fixed and supported. When the removal hammer 31 strikes and drops the product portion G, the impact on the suspended product portion G is small, and the impact is received by the clamping jig 25 even through the runner portion R, and the vibration is not transmitted to the robot arm 1 even through the biscuit portion B. Effect of the Invention

[0010] Since the present invention is configured as described above, the die-cast product M after casting is fixed and supported by the clamping jig 25 while being held by the robot arm 1 that operates three-dimensionally, and in this supported state, the product part G positioned at the position of the extraction hammer 31 is struck and dropped by the extraction hammer 31. In this way, the extraction hammer 31 does not require a position control mechanism for moving along the XY directions as in the conventional case, and further, it can be provided as a simplified system at low cost without the need to provide an anti-vibration mechanism for absorbing the impact of the cylinder 32 for the extraction hammer 31 when the suspended product part G is struck and dropped.

[0011] Furthermore, the clamping jig 25 in the product removal device 20 clamps the runner part R of the die-cast product M gripped by the robot arm 1 even if it is forcibly, thereby firmly fixing and supporting the die-cast product M without rattling. Therefore, even if an impact is applied to the suspended product part G connected to the runner part R, the clamping jig 25 absorbs the impact and does not transmit the impact to the robot arm 1 even through the biscuit part B, and the robot arm 1 gripping the die-cast product M is not damaged.

[0012] Furthermore, since the clamping jig 25 is positioned on the receiving table 23, even if the position of the product portion G of the die-cast product M grasped and brought by the robot arm 1 varies, the product portion G can be adjusted on the receiving table 23 so as to be positioned at the position of the removal hammer 31 in conjunction with the adjustment of the position brought by the robot arm 1.

[0013] Since the product portion G of the die-cast product M is positioned at the position of the extraction hammer 31, there is no need to position the extraction hammer 31 by controlling its movement in, for example, a planar XY direction, and there is no need to have a two-dimensional movement control mechanism, which significantly simplifies the entire apparatus.

[0014] In addition, the attached overflow breaking device 10 breaks and removes the overflow portion F of the product portion G of the die-cast casting M grasped by the robot arm 1 in advance, so that preliminary processing for the impact drop of the product portion G in the product removal device 20 can be carried out quickly.

[0015] The reference numerals in the sections of the Means for Solving the Problems and Effects of the Invention are given for ease of reference to the components shown in the drawings. The present invention is not limited to the structures, shapes, etc. shown by the descriptions and reference numerals in the drawings. [Brief description of the drawings]

[0016] [Figure 1] 1 is a schematic plan view showing one embodiment of the present invention; [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] One embodiment of the present invention will now be described with reference to the drawings. The reference numeral 1 in the drawings denotes a robot arm whose hand unit 3 is operated and controlled in three dimensions, and is installed on a machine stand 2 provided in a location that allows access to, for example, the product removal unit of a die-casting machine D, an overflow breaking device 10 that breaks off an overflow portion F of a die-cast product M, and a product removal device 20 that breaks off a product portion G from a runner portion R and knocks it off.

[0018] As shown in the figure, the robot arm 1 is disposed beside the product removal section, the overflow breaking device 10 is disposed beside the robot arm 1, and the product removal device 20 is disposed in front of the robot arm 1, and when viewed from the location where the robot arm 1 is disposed, they are disposed, so to speak, on a concentric circle with the machine table 2 at the center. Of course, each of these devices (1, 10, 20) is disposed in accordance with a series of work processes, and is not limited to the arrangement shown in the figure.

[0019] In an example of such a configuration, as shown in FIG. 1, an overflow breaking device 10 is disposed via a robot arm 1 disposed to the side of a die casting machine D, and a product removal device 20 is disposed in front of the robot arm 1 at the side of the die casting machine D. The robot arm 1 then brings the die casting product M removed from the die casting machine D past the product removal device 20 to the overflow breaking device 10 (see arrow (1)), and then moves and transports it to the product removal device 20 (see arrow (2)). After removing the product, the robot arm 1 returns to the product removal section of the die casting machine D (see arrow (3)) and waits for the movement of the die casting product M to be cast next. Note that in FIG. 1, all of these states are merely shown by solid lines.

[0020] Generally, a die-cast product M is made up of a biscuit part B that solidifies at the point where molten metal is poured into a die-casting machine D, a runner part R that is continuous with the biscuit part B and connects to a product part G, the product part G that is connected to the runner part R, and an overflow part F that overflows from the product part G and solidifies. After breaking and removing the overflow part F, the product part G is broken and separated from the runner part R, so that the product part G can be removed.

[0021] The robot arm 1 is equipped with a multi-axis hand unit 3, and this hand unit 3 is operated and controlled to remove the die-cast casting M from the product removal unit of the die-casting machine D by grasping the biscuit portion B of the die-cast casting M, and to position the die-cast casting M at predetermined locations of the overflow breaking device 10 and the product removal device 20 by three-dimensional control.

[0022] 2, the overflow breaking device 10 includes a collection box 12 arranged at the bottom of a machine frame 11 constructed, for example, in a rectangular parallelepiped shape, and a die-breaking hammer 13 for breaking off an overflow portion F of a die-cast product M brought to and supported above the collection box 12, and the die-breaking hammer 13 is vertically moved by a cylinder 14 fixed to the machine frame 11. Then, the robot arm 1 sequentially moves and conveys the overflow portion F three-dimensionally to the position of the die-breaking hammer 13 and positions it, and then the die-breaking hammer 13, which moves vertically, knocks the overflow portion F off of the die-cast product M held by the robot arm 1.

[0023] The product removal device 20 separates and removes the product portion G by striking it from the die-cast product M brought by the robot arm 1 after the overflow portion F has been broken off and removed by the overflow breaking device 10.

[0024] As shown in Figures 3 to 7, this product removal device 20 comprises a receiving table 23 arranged within a machine frame 21 which is constructed, for example, in a rectangular parallelepiped shape, a clamping jig 25 provided on this receiving table 23, and an removal hammer 31 which strikes the suspended product portion G of the die-cast product M clamped between the clamping jig 25, and ejects the separated product portion G to a predetermined location so that it can be removed as a product.

[0025] As shown in the figure, the receiving table 23 is fixed to the machine frame 21 in a suspending manner along the front-to-rear direction of the machine frame 21 with its upper surface approximately horizontal on the product chute 22 which is inclined at a height position approximately in the middle of the machine frame 21, and is formed from a strip-shaped material of a specified width and thickness.

[0026] The product chute 22 is disposed on an extension of the hand unit 3 of the robot arm 1 when the hand unit 3 is moving toward the product removal device 20, and its downward inclination is directed, for example, toward the outside of the machine frame 21. The product portion G removed by a pair of removal hammers 31 disposed on both sides of the centrally disposed receiving stand 23 is discharged to the outside of the machine frame 21 via the product chute 22. The removal hammers 31 are disposed on the left and right in correspondence with the product portions G of the die-cast product M disposed on the left and right of the runner portion R continuing to the biscuit portion B, and unlike the conventional method, are fixed at a specific position without being moved.

[0027] In addition, the symbol 24 in the figure denotes a partition plate that separates the product portions G that are dropped onto the product chute 22 at its left and right sides, and is formed in an approximately triangular shape when viewed from the side.It is positioned on the product chute 22 below the receiving table 23.

[0028] The clamping jig 25 is disposed on the receiving table 23 so that the runner portion R of the die-cast product M that the robot arm 1 is holding via the biscuit portion B is clamped, even if forcibly. In addition, the cross section is formed in a groove shape. Thus, the die-cast product M is firmly fixed and supported in a state where the product portion G is suspended in mid-air. If necessary, the clamping jig 25 can be adjusted to a different thickness, shape, etc. of the runner portion R. The groove width is In addition, since the runner portion R of the die-cast product M is clamped in the clamping jig 25, the product portion G itself is not directly placed on any part or member, and is held in a suspended state, so to speak.

[0029] The clamping jig 25 is adjustable in its fixed position on the receiving base 23, so that the suspended product portion G when the die-cast product M is fixed and supported can be adjusted and fixed to correspond to the position of the removal hammer 31. The clamping jig 25 is fixed to the receiving base 23 by a fixing means, as shown in Fig. 7, which comprises fixing legs 26 protruding from the bottom surface of the clamping jig 25, fixing holes 27 formed in the receiving base 23 at appropriate intervals so as to position and fix the fixing legs 26 on the receiving base 23, and a support rod 28 inserted between the fixing legs 26 inserted into the fixing holes 27 and the receiving base 23.

[0030] In this way, the clamping jig 25 is adjusted and positioned in one of the fixing holes 27 arranged in the receiving base 23 to correspond to the position of the removal hammer 31 relative to the product portion G of the die-cast casting M to be brought in, and is firmly fixed and supported by the above-mentioned fixing means.

[0031] The removal hammer 31 is moved up and down by, for example, a cylinder 32 provided on an upper cover portion covering the upper portion of the machine frame 21, and strikes the suspended product portion G of the die-cast product M fixed and supported by the clamping jig 25, separating only the product portion G and dropping it onto the product chute 22. Furthermore, by striking the suspended product portion G, the impact is small and does not impart a large impact to the cylinder 32.

[0032] Then, the runner portion R supported by the clamping jig 25 is removed by the robot arm 1 together with the biscuit portion B held by the robot arm 1 and processed appropriately, after which the robot arm 1 waits at the product removal section of the die casting machine D to remove the next die casting product M. [Explanation of symbols]

[0033] B…Biscuit section D...Die casting machine F: Overflow section G…Product part M: Die-casting products R…Runners 1. Robot arm 2. Machine stand 3. Hand section 10…Overflow breaker device 11...Machine frame 12. Collection box 13...Seki breaking hammer 14…Cylinder 20…Product removal device 21...Machine frame 22…Product chute 23…Pedestal 24…Partition 25… Clamping jig 26...Fixed leg part 27…Fixing hole 28…Support rod 31…Removal hammer 32…Cylinder

Claims

1. 2. A product removal device for die-cast products, which removes a product portion from a cast die-cast product, comprising: a robot arm which grasps a biscuit portion of the die-cast product and moves and transports the die-cast product; and a product removal device which removes the product portion from the die-cast product from which an overflow portion has been broken off and removed. The product removal device is characterized in that the die-cast product from which an overflow portion has been broken off and removed is brought by the robot arm, and with the product portion positioned at the position of the removal hammer, the product removal device comprises a clamping jig which supports the die-cast product by clamping the runner portion of the die-cast product so that the product portion is suspended in mid-air, and an removal hammer which strikes and drops the positioned product portion.

2. 2. The product removal device for die-cast products according to claim 1, wherein the clamping jig is fixed to a receiving stand provided on a structured machine frame so as to be freely positionable and adjustable, and the removal hammer is movable up and down by a cylinder provided on the machine frame.

3. 2. A product removal device for die-casting products as described in claim 1, wherein the clamping jig is formed in a groove shape with a cross section into which the runner portion is forcibly clamped, and is positioned and adjusted on the receiving table to correspond to the removal position of the product portion.

4. 2. The product removal device for die cast products as described in claim 1, further comprising an overflow breaking device for breaking and removing the overflow portion, the overflow breaking device being disposed within a constructed machine frame, and a die cast product moving and transported by a robot arm, the overflow portion of which is supported in a three-dimensionally positioned state, and a die cast product breaker hammer for breaking off the overflow portion of the die cast product.

Images