JP5707056B2 - Surface processing machine - Google Patents

Description

  The present invention relates to a surface processing machine for processing a work surface such as a die mounting surface in a molding machine such as a die cast molding machine or an injection molding machine.

  A molding machine such as a die-cast molding machine has a die plate for mounting a mold. A mold is fixed to the mold mounting surface of the die plate. In such a molding machine, for example, the mold mounting surface is corroded due to the influence of moisture of the release agent sprayed on the inner surface of the mold during molding for a long time, or the mold mounting surface is deformed due to deterioration over time. Sometimes. If the mold mounting surface is deformed, the support of the mold becomes insufficient, which may adversely affect the parting line of the mold.

  Therefore, overlay welding is performed to repair the mold mounting surface. Furthermore, the die mounting surface on which this overlay welding has been performed is also finished flat by a surface processing machine. As the surface processing machine, for example, a milling unit disclosed in Patent Document 1 below can be used. This surface processing machine (milling unit) is configured to fix a base plate to a processing surface from which a mold has been removed by an electromagnetic magnet, and to perform processing of the processing surface by a hydraulic motor as a drive source. Yes.

JP-A-8-281511

  In the configuration in which the surface processing machine is fixed to the processing surface as in Patent Document 1, it is necessary to change the mounting position of the surface processing machine when processing the entire processing surface. For this reason, it is not possible to continuously process the entire surface to be processed at a time, and the work is troublesome. Further, when the mounting position of the surface processing machine changes, the pressing force (processing pressure) of the cutting tool against the surface to be processed may change, and uniform processing may not be possible. Moreover, a surface processing machine that uses hydraulic pressure as a drive source requires a hydraulic system such as a hydraulic pump or hydraulic piping. If the hydraulic system is poorly handled, the surroundings of the surface processing machine may be contaminated with oil.

  Accordingly, an object of the present invention is to provide a surface processing machine capable of processing a surface to be processed efficiently and uniformly.

  The surface processing machine of the present invention includes a frame structure attached to a die attachment surface of one die plate of a pair of die plates facing each other, and the die attachment surface along a guide portion provided on the frame structure. A linear movement unit movable in a direction parallel to the linear movement unit, a drive mechanism for reciprocating the linear movement unit along the guide portion, and a rotation shaft provided in the linear movement unit and extending in a direction perpendicular to the guide portion. A swivel arm that can swivel around, a swivel mechanism that rotates the swivel arm, a cutting tool that is provided on the swivel arm and that faces a work surface of the other die plate of the pair of die plates, and the cutting tool And a cutting amount adjusting mechanism capable of adjusting a distance from the processing surface to the cutting tool.

  An example of the drive mechanism includes a servo motor and a ball screw. An example of the turning mechanism includes a servo motor and a speed reduction mechanism. And this surface processing machine is equipped with the controller which controls each said servomotor. The controller includes a computer program for controlling the rotation direction and the rotation amount of the servo motors in association with each other so that the cutting tool moves along a predetermined locus along the processing surface. For example, the cutting tool is programmed to move in the region inside the outer periphery of the processing surface after the cutting tool is moved along the outer periphery of the processing surface.

  The frame structure is fixed to the die plate by, for example, a nut member inserted into a mold fixing groove formed on the die plate and a bolt screwed to the nut member.

  An example of the frame structure includes a frame body extending in a direction parallel to the mold mounting surface at a position away from the mold mounting surface, and base members provided at both ends of the frame body, The base member is fixed to the mold mounting surface, and a clearance larger than the height of the overlay welding portion formed on the mold mounting surface is secured on the side of the base member facing the mold mounting surface. The step part for doing is formed.

  The surface processing machine of the present invention can be mounted by using the die mounting surface of one die plate facing the processing surface of the pair of die plates, so that a dedicated frame for mounting is unnecessary. It is. Even if the position of the cutting tool changes during processing, the distance from the cutting tool to the rotation axis of the swivel arm is always constant, so that the bending moment applied to the swivel arm is stable. The reaction force received by the cutting tool during processing can be reliably supported by the die plate through the rigid frame structure. For this reason, the processing surface can be processed uniformly, and the entire processing surface can be processed efficiently.

Sectional drawing which shows an example of a molding machine typically. The front view which shows typically the molding machine and welding robot which were shown by FIG. The side view which shows typically the surface processing machine which concerns on one Embodiment of this invention. The front view of the surface processing machine shown by FIG. Sectional drawing of the surface processing machine along the F5-F5 line | wire in FIG. Sectional drawing of the surface processing machine along the F6-F6 line in FIG. (A) (B) is a front view which shows typically the 1st position and 2nd position of the said surface processing machine, respectively. (A) and (B) are front views schematically showing a third position and a fourth position of the surface processing machine, respectively. (A) and (B) are front views schematically showing a fifth position and a sixth position of the surface processing machine, respectively. (A) and (B) are front views schematically showing a seventh position and an eighth position of the surface processing machine, respectively. (A) and (B) are front views schematically showing a ninth position and a tenth position of the surface processing machine, respectively. (A) and (B) are front views schematically showing an eleventh position and a twelfth position of the surface processing machine, respectively.

Hereinafter, one embodiment of the present invention will be described with reference to FIGS.
1 and 2 schematically show a die cast molding machine 10 which is an example of a molding machine. The die cast molding machine 10 includes a fixed die plate 11, a movable die plate 12, four tie bars 13, 14, 15, 16 extending in parallel to each other, a die plate driving mechanism 17, and the like. The die plate drive mechanism 17 has a function of moving the movable die plate 12 in the horizontal direction along the tie bars 13 to 16.

  The fixed die plate 11 and the movable die plate 12 each have a die mounting surface 20.21. A fixed mold 22 is mounted on the mold mounting surface 20 of the fixed die plate 11. A moving mold 23 is mounted on the mold mounting surface 21 of the moving die plate 12. A cavity 24 for a molded product is formed between the fixed side mold 22 and the moving side mold 23. The cavity 24 communicates with a molten metal supply mechanism (not shown) through the molten metal passage 25 so that molten metal as a material of the molded product is supplied to the cavity 24 in a pressurized state.

  When the die mounting surfaces 20 and 21 of the die plates 11 and 12 need to be repaired due to corrosion or deformation due to deterioration over time, the robot 30 shown in FIG. , 21 overlay welding is performed. The robot 30 is an articulated robot, for example, and includes a welding torch 32 at the tip of the robot arm 31.

  The robot 30 includes a filler material supply device 33 for supplying a filler material made of, for example, nickel-based metal to the welding torch 32. The filler material is supplied to the welding torch 32 by the filler material supply device 33, and the filler material is melted to build up the welding target area S (shown by hatching in FIG. 2) of the mold mounting surfaces 20, 21. It is comprised so that welding may be made. The thickness of overlay welding is about 2 mm, for example. The die mounting surfaces 20 and 21 subjected to overlay welding are subjected to a cutting process by a surface processing machine 40 described below, and are finished flat. That is, the build-up welded portions of the die plates 11 and 12 become the processed surfaces S1 and S2, respectively.

  An example of the surface processing machine 40 is shown in FIGS. FIG. 3 is a side view schematically showing the surface processing machine 40 and the die plates 11 and 12. 4 is a front view of the surface processing machine 40, FIG. 5 is a plan view of the surface processing machine 40, and FIG. 6 is a cross-sectional view. The surface processing machine 40 can be mounted on either the mold mounting surface 20 of the fixed die plate 11 or the mold mounting surface 21 of the movable die plate 12 with the configuration described below.

  For example, when the surface processing machine 40 is attached to the fixed die plate 11 as shown in FIG. 3, the build-up welded portion (surface S2 to be processed) of the movable die plate 12 is cut by the surface processing machine 40. The When the surface processing machine 40 is attached to the movable die plate 12, the build-up welded portion (surface S1 to be processed) of the fixed die plate 11 is cut by the surface processing machine 40.

  In the following description, the case where the surface processing machine 40 is attached to the fixed die plate 11 will be described as a representative. The same applies to the case where the surface processing machine 40 is attached to the movable die plate 12, and the description of the case where the surface processing machine 40 is attached to the movable die plate 12 is omitted.

  As shown in FIG. 3, the surface processing machine 40 includes a frame structure 41 that is detachably fixed to the fixed die plate 11, a linear movement unit 42 that is movably provided on the frame structure 41, and a linear movement unit 42. A driving mechanism 43 for driving, a turning arm 44 mounted on the linear movement unit 42, a turning mechanism 45 for rotating the turning arm 44, a cutting tool 50 provided on the turning arm 44, and a cutting tool for rotating the cutting tool 50 A rotation mechanism 51, a controller 52, and the like are included. The controller 52 includes various data and a computer program for electrically controlling a series of operations of the surface processing machine 40.

  As shown in FIGS. 3 and 4, the frame structure 41 includes a frame main body 41 a extending in a horizontal direction in parallel to the mold mounting surface 20 at positions away from the mold mounting surface 20, and both end portions of the frame main body 41 a. And a pair of base members 41b and 41c fixed by bolts 60. The frame structure 41 is fixed to the mold mounting surface 20 of the fixed die plate 11 by bolts 61.

  More specifically, as shown in FIGS. 5 and 6, a nut member 63 is inserted into a mold mounting groove 62 (T-groove having a deep back) formed on the mold mounting surface 20 of the fixed die plate 11. The base members 41b and 41c of the frame structure 41 are fixed to the mold mounting surface 20 of the fixed die plate 11 by screwing bolts 61 into the nut members 63, respectively. The groove portion 62 extends in the horizontal direction and prevents the nut member 63 from coming off.

  As shown in FIG. 5, the thickness T1 of the base members 41b and 41c in contact with the fixed die plate 11 is formed to be several mm or more larger than the thickness T2 of other parts. By doing so, a gap G (for example, several mm or more) larger than the height of the welded portion formed on the mold mounting surface 20 is formed on the back surface of the base members 41b and 41c, that is, the side facing the mold mounting surface 20. Step portions 41d and 41e are formed for securing a gap.

  That is, the frame structure 41 is fixed to the fixed die plate 11 so as to straddle the build-up welded portion (processed surface S1) of the fixed die plate 11. The gap G prevents the base members 41b and 41c from interfering with the build-up weld (work surface S1), so that the frame structure 41 can be fixed to the mold mounting surface 20 of the fixed die plate 11. It became.

  The frame structure 41 extends in parallel with the mold mounting surface 20 along the mold mounting surface 20 of the fixed die plate 11. The frame structure 41 is provided with guide portions 70 and 71 such as a pair of guide rails. The guide portions 70 and 71 are provided on the frame main body 41 a so as to be parallel to the mold mounting surface 20.

  A slide member 72 is movably provided in each guide portion 70 and 71. These guide portions 70 and 71 and the slide member 72 constitute a linear motion guide mechanism (linear system). The slide member 72 forms part of the linear movement unit 42, and the linear movement unit 42 moves in a direction parallel to the mold mounting surface 20 along the guide portions 70 and 71.

  An example of the drive mechanism 43 for moving the linear movement unit 42 includes a first servo motor 75 and a ball screw 76 rotated by the servo motor 75. When the ball screw 76 rotates according to the rotation direction and the rotation amount of the first servomotor 75, the linear movement unit 42 can move in the first direction A1 or the second direction A2 shown in FIG. .

  A swivel arm 44 is provided in the linear movement unit 42. As shown in FIG. 5, the turning arm 44 is rotatably supported by a bearing 81 provided on the body 80 of the linear movement unit 42. The turning mechanism 45 includes a second servo motor 85, a power transmission mechanism 86, a speed reduction mechanism 87, and the like. A rolling element capable of receiving loads in the thrust direction and the radial direction applied to the swing arm 44 is used for the bearing 81 that rotatably supports the swing arm 44.

  When the second servo motor 85 rotates, the rotation is transmitted to the speed reduction mechanism 87 via the power transmission mechanism 86, the torque of the servo motor 85 is increased, and the turning arm 44 is moved in the first direction shown in FIG. It turns in R1 or 2nd direction R2. As shown in FIG. 3, the rotation axis X <b> 1 of the turning arm 44 extends in a direction perpendicular to the mold mounting surfaces 20 and 21.

  The cutting tool 50 is supported by the turning arm 44 via the head portion 90. The head portion 90 is configured to be movable in a direction parallel to the rotation axis X1 with respect to the turning arm 44. The head portion 90 is provided with a cut amount adjusting mechanism 91 (shown in FIG. 5). The cut amount (for example, 1 to 2 mm) is adjusted by adjusting the distance from the workpiece surface S2 to the cutting tool 50 by the cut amount adjusting mechanism 91. The cutting depth can be read by a measuring instrument 92 using a micrometer or the like. After the cutting amount of the cutting tool 50 is adjusted, the head portion 90 is fixed to the turning arm 44 by operating the clamp handle 93.

  The blade 50 is rotated around a rotation axis X2 (shown in FIG. 3) by a third servo motor 100. The third servo motor 100 forms part of the blade rotation mechanism 51. The rotation axis X2 of the cutting tool 50 is parallel to the rotation axis X1 of the turning arm 44. When the cutting tool 50 is rotated by the third servo motor 100, the work surface S2 is cut by an amount corresponding to the cutting depth.

  The controller 52 has a function of controlling the servo motors 75, 85 and 100. As an example, the controller 52 stores various data and computer programs for controlling the operation of the surface processing machine 40 so as to cut the surface S2 in the order shown in FIGS. Yes.

  Below, an example in the case of processing the to-be-processed surface S2 of the movement die plate 12 with the surface processing machine 40 attached to the fixed die plate 11 is demonstrated. In addition, when processing the to-be-processed surface S1 of the fixed die plate 11, the surface processing machine 40 is fixed to the moving die plate 12, and it cuts in the order similar to the to-be-processed surface S2.

  First, the linear servo unit 75 is moved in the horizontal direction by the first servo motor 75, and the turning arm 44 is turned by the second servo motor 85, whereby the cutting tool is moved to the first position shown in FIG. Move 50. In order to eliminate unevenness of shaving, the shaving around the work surface S2 is started from the first position.

  The cutting tool 50 is rotated by the third servo motor 100, and the cutting tool 50 is directed to the second position shown in FIG. 7B while cutting the work surface S2. In this case, the cutting tool 50 is moved along the periphery of the work surface S2 by turning the turning arm 44 by the second servomotor 85 while moving the linear movement unit 42 by the first servomotor 75, The area shown by parallel oblique lines (hatching) is cut. The direction and amount of rotation of the servo motors 75 and 85 are controlled by the controller 52 based on data stored in the controller 52 in advance and a computer program.

  Furthermore, after the cutting tool 50 is moved to the third position in FIG. 8A, the cutting tool 50 moves toward the fourth position shown in FIG. 8B. In this way, the periphery of the processing surface S2 is further processed. Also in this case, the rotation direction and the rotation amount of the servo motors 75 and 85 are associated with each other and controlled by the controller 52 so that the cutting tool 50 moves along the periphery of the workpiece surface S2.

  Subsequently, after the cutting tool 50 moves to the fifth position in FIG. 9A, the cutting tool 50 moves to the sixth position shown in FIG. 9B, whereby the entire circumference of the surface S2 is processed. . After that, the cutting tool 50 is moved to a region inside the processing surface S2. The blade 50 continues to rotate by the servo motor 100. For example, when the cutting tool 50 moves toward the seventh position shown in FIG. 10A, a part of the inner region of the work surface S2 is shaved, and then the moving direction of the cutting tool 50 is switched. It goes to the eighth position shown in FIG.

  Furthermore, after the cutting tool 50 moves toward the ninth position shown in FIG. 11 (A), the direction is switched again and moves toward the tenth position shown in FIG. 11 (B). Subsequently, after the cutting tool 50 is moved to the eleventh position shown in FIG. 12A, the direction is switched and the cutting tool 50 is moved to the twelfth position shown in FIG. The processing of the area inside is finished.

  As described above, the servomotors 75 and 85 are controlled by the controller 52 in accordance with the trajectory for moving the cutting tool 50, whereby the workpiece surface S2 can be processed continuously and evenly. After the processing surface S2 is processed in this way, the surface processing machine 40 is detached from the fixed die plate 11. When the surface to be processed S1 of the fixed die plate 11 is processed by the surface processing machine 40, the surface processing machine 40 is attached to the movable die plate 12. Then, the work surface S1 of the fixed die plate 11 can be processed in the same order as described above.

  The surface processing machine 40 of this embodiment is attached to the die mounting surface of one die plate of the pair of die plates 11 and 12 facing each other, and the other die plate is opposed to this die mounting surface. Machining the machined surface. That is, the die plate is used as a support device for the surface processing machine 40. For this reason, the special mount for supporting the surface processing machine 40 is unnecessary, and an electromagnetic magnet is also unnecessary. In addition, the blade 50 can be rotated by the large torque obtained by the servo motor 100, and hydraulic equipment such as a hydraulic pump is not required.

  In this surface processing machine 40, even if the swivel arm 44 revolves around the rotation axis X1 during machining, the distance (span) from the blade 50 to the rotation axis X1 is always constant. The bending moment acting on is almost constant and stable. In addition, since both ends of the steel main frame 41a having high rigidity are fixed to the die plate via the base members 41b and 41c, the frame structure 41 is substantially rigid. For this reason, the reaction force that the cutting tool 50 receives from the surface to be processed during machining is constant, and the reaction force can be reliably supported by the die plate via the frame structure 41 having high rigidity.

  Therefore, the pressing force (processing pressure) of the cutting tool 50 against the processing surface can be kept constant, and the processing surface can be processed uniformly and accurately. Moreover, it is not necessary to change the mounting position of the surface processing machine 40 during processing, and the entire surface to be processed can be processed continuously by one processing process.

  In practicing the present invention, for example, a specific aspect of the die plate and the work surface, a specific structure, shape, and arrangement of a frame structure, a linear movement unit, a swing arm, a blade, a blade rotation mechanism, and a cutting amount adjustment mechanism Needless to say, the dimensions, materials, and the like can be changed as appropriate. Moreover, the surface processing machine of this invention is applicable to surface processing of various apparatuses other than a die-cast molding machine.

DESCRIPTION OF SYMBOLS 11, 12 ... Die plate S1, S2 ... Work surface 40 ... Surface processing machine 41 ... Frame structure 42 ... Linear movement unit 43 ... Drive mechanism 44 ... Turning arm 45 ... Turning mechanism 50 ... Cutting tool 51 ... Cutting tool rotation mechanism 52 ... Controller 75, 85, 100 ... Servo motor

Claims (5)

A frame structure that is attached to a die mounting surface of one of the pair of die plates facing each other;
A linear movement unit capable of moving in a direction parallel to the mold mounting surface along a guide portion provided in the frame structure;
A drive mechanism for reciprocating the linear movement unit along the guide part;
A swivel arm provided in the linear movement unit and capable of swiveling around a rotation axis extending in a direction perpendicular to the guide portion;
A turning mechanism for rotating the turning arm;
A cutting tool provided on the swivel arm and facing a work surface of the other die plate of the pair of die plates;
A blade rotation mechanism for rotating the blade,
A cutting amount adjusting mechanism capable of adjusting a distance from the work surface to the cutting tool;
A surface processing machine comprising:   Each of the drive mechanism and the turning mechanism has a servo motor, and the surface processing machine includes a controller that controls the servo motor, and the controller is configured such that the cutting tool has a predetermined shape along the surface to be processed. 2. The surface processing machine according to claim 1, further comprising a computer program for controlling a rotation direction and a rotation amount of the servo motors so as to move on the locus.   The controller has a computer program for moving the cutting tool in a region inside the outer periphery of the processing surface after moving the cutting tool along the outer periphery of the processing surface. The surface processing machine according to claim 2.   The frame structure is fixed to the die plate by a nut member inserted into a mold fixing groove formed on the die plate and a bolt screwed to the nut member. The surface processing machine according to claim 1 or 2.   The frame structure includes a frame main body extending in a direction parallel to the mold mounting surface at a position away from the mold mounting surface, and base members provided at both ends of the frame main body. A member is fixed to the mold mounting surface, and a gap larger than the height of the welded portion formed on the mold mounting surface is secured on the side of the base member facing the mold mounting surface. The surface processing machine according to claim 4, wherein a step portion is formed.

Images