JP2014233739A - Sleeve set device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sleeve set device which can automate the pitch change work of a sleeve.SOLUTION: By descending a frame body 21 as shown in Fig. (a), a part of a sleeve support body 22 intrudes into a clearance between second positioning pieces 66, 66. Next, the frame body 21 is horizontally moved by a robot 27 as shown by an outline arrow. As shown in Fig. (b), a pitch of the sleeve support body 22 becomes b by the second positioning piece 66 of a pitch b. Then, a hole-punched plate 48 is descended. Thus, a pitch a of the sleeve support body 22 can be changed to the pitch b. As an effect, a support body constraint mechanism is brought into a non-constraint state before a sleeve is set to a forging metal mold, the sleeve is set to a prescribed pitch by a sleeve positioning jig, and the support body constraint mechanism is brought into a constraint state. By this constitution, there can be provided a sleeve set device which can make even the pitch change work of the sleeve unmanned.

Description

  The present invention relates to a sleeve setting device for setting a sleeve on a casting mold.

In recent years, cylinder blocks are manufactured from light alloy castings such as aluminum alloys and magnesium alloys. If it is a light alloy, the weight can be significantly reduced compared to cast iron.
However, a cylinder in which the piston slides at a high speed uses a cast iron cylinder in order to increase strength and heat resistance.
In this case, the cast iron cylinder is set in the casting mold, and then the molten metal is poured.

Since the cast iron cylinder is a cylindrical body, it is also called a sleeve. Hereinafter, it is called a sleeve.
In order to save labor and improve productivity, this sleeve has been set by mechanical means instead of manpower (see, for example, Patent Document 1 (FIG. 3)).

  As shown in FIG. 3 of Patent Document 1, the sleeve setting device includes a moving mechanism (4) (the numbers in parentheses indicate the symbols described in Patent Document 1. The same applies hereinafter) and the moving mechanism (4). A support member (6) to be supported, four insertion heads (10) supported by the support member (6), and a pair of positioning members (15, 16) that keep these insertion heads (10) at a predetermined pitch. ) And a pressure plate (31) arranged along the insertion head (10).

A sleeve is fitted into the insertion head (10). The fitted sleeve is transferred from the insertion head (10) to the mold by the forward movement of the pressure plate (31).
Moreover, the sleeves can be set at different pitches by exchanging the pair of positioning members (15, 16).

However, the pair of positioning members (15, 16) are exchanged manually.
That is, Patent Document 1 is useful when the sleeve pitch change frequency is small.
However, in recent years, there has been a demand for increasing the frequency of sleeve pitch change due to the demand for small-lot multi-product production, and it is desirable that the sleeve pitch change operation be unmanned.

Japanese Patent No. 3151059

  It is an object of the present invention to provide a sleeve setting device capable of unmanned sleeve pitch change work.

The invention according to claim 1 is a sleeve setting device for setting a sleeve at a cylinder position of a casting mold for casting a cylinder block of an engine,
A transport mechanism for transporting a heavy object three-dimensionally, a frame supported by the transport mechanism, a rail laid on the frame, and a plurality of movably attached to the rail and supporting the sleeve A sleeve support, a support restraining mechanism that is provided on the frame and makes the sleeve support non-movable at a predetermined position, and is provided separately from the transport mechanism and supported by the plurality of sleeve supports. A sleeve positioning jig for positioning the sleeve at a predetermined pitch, and before setting the sleeve on the casting mold, the support body restraining mechanism is brought into an unrestrained state, and the sleeve positioning jig is used to position the sleeve at a predetermined position. And a control unit that puts the support body restraining mechanism in a restrained state.

  The invention according to claim 2 is characterized in that the sleeve positioning jig has a plurality of positioning pieces standing at a predetermined pitch.

  In the invention according to claim 3, the support restraint mechanism includes a pin extending from each of the sleeve supports, a perforated plate that is provided movably on the frame and has a plurality of pin holes corresponding to the pins, and a frame. And an actuator that moves the perforated plate to a position where the pin is disengaged from the position where the pin fits into the pin hole.

  In the invention according to claim 4, the support restraint mechanism has a plurality of first magnets provided on each of the sleeve supports and a plurality of second magnuts that are movably provided on the frame and are magnetically attracted to the first magnets. It is characterized by comprising a plate and an actuator that is provided on the frame and moves the moving plate to a position away from the position where the first magnet is attracted to the second magnet.

  The invention according to claim 5 is characterized in that the frame body has a gripping mechanism for gripping the cast cylinder block and removing it from the casting mold on the other surface.

In the invention according to claim 1, the sleeve positioning jig for positioning the sleeve at a predetermined pitch is provided separately from the transport mechanism. Before setting the sleeve to the casting mold, the control unit puts the support restraint mechanism into an unrestrained state, sets the sleeve to a predetermined pitch with the sleeve positioning jig, and puts the support restraint mechanism into a restrained state.
Therefore, a sleeve setting device that can unmanned the pitch change operation of the sleeve is provided.

  In the invention according to claim 2, the sleeve positioning jig has a plurality of positioning pieces standing at a predetermined pitch. The sleeve positioning jig is a very simple jig and is inexpensive. Therefore, an increase in the manufacturing cost of the sleeve setting device can be suppressed.

  In the invention which concerns on Claim 3, a support body restraining mechanism consists of a pin, a perforated board, and an actuator. The support restraint mechanism is a very simple mechanism and is inexpensive. Therefore, an increase in the manufacturing cost of the sleeve setting device can be suppressed.

  In the invention which concerns on Claim 4, a support body restraint mechanism consists of a 1st, 2nd magnet and an actuator. The support restraint mechanism is a very simple mechanism and is inexpensive. Therefore, an increase in the manufacturing cost of the sleeve setting device can be suppressed.

  In the invention according to claim 5, the frame body has a gripping mechanism for gripping the cast cylinder block and removing it from the casting mold on the other surface. The sleeve setting device is also provided with a gripping mechanism, and the cast product is removed from the mold by the gripping mechanism. That is, since the cast set can be discharged in addition to the sleeve set by the sleeve setting device, the sleeve setting device can be used in combination.

It is a figure explaining the process of setting a sleeve to the metal mold | die for casting. It is a figure explaining a casting process. It is a figure explaining a mold opening process. FIG. 4 is a view taken in the direction of arrow 4 in FIG. 1. FIG. 5 is a sectional view taken along line 5-5 of FIG. It is sectional drawing of a sleeve setting apparatus. FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 6. It is sectional drawing of the 1st, 2nd sleeve positioning jig. It is an operation view of the first sleeve positioning jig. It is sectional drawing of the positioned sleeve setting apparatus. It is an operation view of the second sleeve positioning jig. It is a figure explaining the point which changes a pitch from 2a to 2b in a grasping mechanism. It is a figure explaining the point which changes a pitch from 2b to 2a in a grasping mechanism. It is sectional drawing of a jig | tool when using a jig | tool when changing the pitch of a holding | grip mechanism. It is an effect | action figure of a 1st, 2nd holding | grip positioning jig | tool. It is sectional drawing which shows the example of a change of the sleeve setting apparatus shown in FIG.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.

As shown in FIG. 1, the casting mold 10 includes a fixed mold 12 having a runner 11 and a movable mold 13 that moves forward and backward to the fixed mold 12. The movable mold 13 forms first split molds 14 and 14 forming side surfaces of the cylinder block, second split molds 15 and 15 surrounding the first split molds 14 and 14, and a packing surface of the cylinder block. It consists of a third divided type 16.
The third split mold 16 includes a columnar sleeve receiver 17 and nests 18 and 18 that form a water jacket.

In the opened casting mold 10, a frame 21, which is a main part of the sleeve setting device 20, is inserted between the fixed mold 12 and the movable mold 13. A sleeve 23 is fitted on a sleeve support 22 projecting from the frame 21, and the sleeve support 22 is applied to the sleeve receiver 17 by the movement of the arrow (1). Next, the sleeve 23 is moved from the sleeve support 22 to the sleeve receiver 17 by advancing the pressure plate 24 (sleeve setting step).
Thereafter, the frame body 21 is removed from between the fixed mold 12 and the movable mold 13.

As shown in FIG. 2, the casting mold 10 assembled and clamped is poured into a cavity through a runner 11 (a casting process).
After the hot water has solidified, the mold is opened.
As shown in FIG. 3, when the movable mold 13 is separated from the fixed mold 12, the cylinder block 26 of the engine remains in the movable mold 13 (mold opening process).

  Next, the frame body 21 is inserted between the fixed mold 12 and the movable mold 13. At this time, the frame body 21 is rotated in advance, and the gripping mechanism 30 is directed to the cylinder block 26. The cylinder block 26 is gripped by the gripping mechanism 30 inserted into the crankcase by the movement of the arrow (2), and the cylinder block 26 is removed from the movable mold 13 by the movement of the arrow (3). As described above, the cylinder block 26 is dispensed from the casting mold 10 (product dispensing process).

A detailed structure of the sleeve setting device 20 that performs the series of steps shown in FIGS. 1 to 3 will be described below.
As shown in FIG. 4, the sleeve setting device 20 includes a robot 27 as a transport mechanism, a box-shaped frame body 21, and a plurality (four in this example) of sleeve support bodies protruding from one surface of the frame body 21. 22, a pressure plate 24 disposed at the base of these sleeve supports 22, and a gripping mechanism 30 attached to the other surface of the frame body 21.

As shown in FIG. 5, the gripping mechanism 30 includes a first clamper 31 and a second clamper 32.
The first clamper 31 includes a bracket 33 attached to the frame body 21, a pair of clamp claws 35 and 35 attached to the bracket 33 via the rotation shafts 34 and 34 so as to be opened and closed, and the rotation shafts 34 and 34. Rotating means for rotating (FIG. 4, reference numerals 36 and 36).

  The second clamper 32 includes a rail 37 laid on the frame body 21, a slider 38 movably fitted to the rail 37, a bracket 33 attached to the slider 38, and rotating shafts 34, 34 on the bracket 33. And a pair of clamp claws 35, 35 attached to be openable and closable and rotating means (FIG. 4, symbols 36, 36) for rotating the rotating shafts 34, 34 respectively.

  A first hole 41 and a second hole 42 are provided in the slider 38. A positioning cylinder 43 is provided on the frame body 21 side. When the rod of the positioning cylinder 43 is fitted into the first hole 41 or the rod of the positioning cylinder 43 is fitted into the second hole 42, the slider 38 is immovable.

  As shown in FIG. 6, a main rail 46 is passed to the frame body 21, a main slider 47 is movably fitted on the main rail 46, and the sleeve support 22 is extended from each of the main sliders 47. A perforated plate 48 is movably fitted to the frame body 21, and an actuator 49 for moving the perforated plate 48 is provided on the frame body 21.

  Guide sleeves 51, 51 are provided on the frame body 21, and guide rods 52, 52 are passed through these guide sleeves 51, 51, and these guide rod guide rods 52, 52 are fixed to both ends of the perforated plate 48. As a result, even if the number of actuators 49 is one, the perforated plate 48 can be moved while maintaining a parallel state with the main rail 46.

The perforated plate 48 is provided with four first pin holes 53 at a pitch a and four second pin holes 54 at a pitch b that is about 10% larger than a.
Pointed pins 55 are extended from the main slider 47, and these pins 55 are selectively fitted into the first pin holes 53 and the second pin holes 54, respectively.
That is, the support body restraining mechanism 50 includes a pin 55, a perforated plate 48 having pin holes 53 and 54, and an actuator 49.

  As shown in FIG. 7, a main rail 46 extends in the front and back direction of the drawing, a main slider 47 is fitted into the main rail 46, the sleeve support 22 extends from the main slider 47 to the left in the figure, and a pin 55 extends to the right in the figure. . When the pin 55 is fitted in the first pin hole 53 of the perforated plate 48 by the forward movement of the actuator 49, the main slider 47 becomes immovable.

The pressure plate 24 is provided for each sleeve support 22.
The main slider 47 is provided with pressure plate moving means 56, and the rod 57 is connected to the pressure plate 24. Guide rods 59 and 59 passing through the guide portions 58 and 58 of the main slider 47 are extended from the end portion of the pressure plate 24.

  The pressure plate 24 moves back and forth by the action of the pressure plate moving means 56. Since it is guided by the guide rods 59, 59, the pressure plate 24 moves smoothly without shaking.

  As shown in FIG. 8, at least two types of sleeve positioning jigs 61 and 62 are provided. These sleeve positioning jigs 61 and 62 are not attached to the robot 27. And it arrange | positions in the turning range of the robot 27. FIG.

  As shown in FIG. 8A, the first sleeve positioning jig 61 includes a base 63 and a first positioning piece 64 that stands on the base 63 at a pitch a. Preferably, the tip (upper end) of the first positioning piece 64 has a pointed shape. More preferably, the first detection piece 65 is provided on the first positioning piece 64 on one end side.

  As shown in FIG. 8B, the second sleeve positioning jig 62 includes a base 63 and a second positioning piece 66 standing on the base 63 at a pitch b. Preferably, the tip (upper end) of the second positioning piece 66 has a pointed shape. More preferably, the second detection piece 67 is provided on the second positioning piece 66 on the other end side.

Next, the operation of the first and second sleeve positioning jigs 61 and 62 will be described.
The frame body 21 shown in FIG. 6 is moved to the vicinity of the second sleeve positioning jig 62 by the robot 27, and the posture is changed so that the sleeve support body 22 extends downward during this time.
The perforated plate 48 is raised right above the second sleeve positioning jig 62. Thus, the main slider 47 can be moved.

  As shown in FIG. 9A, when the frame body 21 is further lowered, a part of the sleeve support body 22 enters between the second positioning pieces 66 and 66. Next, the frame 27 is moved laterally by the robot 27 as indicated by the white arrow. Before the movement, the second sensor 68 and the second detection piece 67 do not match.

As shown in FIG. 9B, when the second sensor 68 detects the second detection piece 67, the lateral movement is stopped. At this time, the pitch of the sleeve support 22 is b due to the second positioning pieces 66 having the pitch b. Next, the perforated plate 48 is lowered. The pin 55 passes through the second pin hole 54.
As shown in FIG. 10, the sleeve support 22 changed to the pitch b cannot be moved by the perforated plate 48. In this state, casting is performed according to the procedure shown in FIGS.

Next, a procedure for returning the pitch b to the pitch a will be described.
The frame body 21 shown in FIG. 10 is moved by the robot 27 to the vicinity of the first sleeve positioning jig 61.
The perforated plate 48 is raised right above the first sleeve positioning jig 61. Thus, the main slider 47 can be moved.

  As shown in FIG. 11A, when the frame body 21 is further lowered, a part of the sleeve support body 22 enters between the first positioning pieces 64 and 64. Next, the frame 27 is moved laterally by the robot 27 as indicated by the white arrow. Before the movement, the first sensor 69 and the first detection piece 65 do not match.

As shown in FIG. 11B, when the first sensor 69 detects the first detection piece 65, the lateral movement is stopped. At this time, the pitch of the sleeve support 22 is a due to the first positioning pieces 64 having the pitch a. Therefore, the perforated plate 48 is lowered.
Thus, the form of FIG. 6 is obtained. The above control is performed by the control unit 70.

In FIG. 6, if the positions of the first to fourth sleeve support bodies 22 are controlled by the cylinder units, it is necessary to store four cylinder units in the frame body 21. Since the four cylinder units each need to be precisely controlled, servo control is required. Servo control is expensive.
In this regard, in the present invention, four cylinder units are not required and servo control is not required. The first and second sleeve positioning jigs 61 and 62 are simply prepared and the free time of the robot 27 is used. The pitch can be changed simply by operating the robot 27. The first and second sleeve positioning jigs 61 and 62 have a simple structure and are inexpensive. As a result, the cost increase of the sleeve setting device can be suppressed.

Next, a procedure for changing the pitch in the gripping mechanism will be described.
An example in which a dedicated jig is not used to change the pitch of the gripping mechanism will be described with reference to FIGS. 12 and 13, and an example in which a dedicated jig is used will be described with reference to FIGS.

  As shown in FIG. 12A, a first sleeve positioning jig 61 is used instead of a dedicated jig. Specifically, five first positioning pieces 64 are provided on the first sleeve positioning jig 61, but the first positioning pieces 64E at one end or the other end (E is added to distinguish them from the other). Is used.

  When the pitch between the first clamper 31 and the second clamper 32 is 2a, out of the clamp claws 35, 35 of the second clamper 32, the clamp claws 35A on the first clamper 31 side (A is distinguished from others). Is inserted between the first positioning piece 64E and the first positioning piece 64 adjacent to the first positioning piece 64E, and the robot 27 is moved as indicated by the white arrow to be stationary. The clamp pawl 35A is applied to the first positioning piece 64E. If the movement continues further, the first clamper 31 continues to move, but the second clamper 32 does not move. As a result, the pitch between the first clamper 31 and the second clamper 32 increases.

As shown in FIG. 12B, when the pitch between the first clamper 31 and the second clamper 32 expands to 2b, the movement of the robot 27 is stopped. Then, the rod of the positioning cylinder 43 is advanced and inserted into the second hole 42.
Thus, the pitch between the first clamper 31 and the second clamper 32 can be changed from 2a to 2b.

Next, a procedure for changing (returning) the pitch 2b to 2a will be described.
As shown in FIG. 13 (a), when the pitch between the first clamper 31 and the second clamper 32 is 2b, the robot 27 is moved as indicated by the white arrow, so that the clamp pawl of the second clamper 32 is obtained. 35 and 35, the clamp claw 35B far from the first clamper 31 (B is added to distinguish it from the other) is applied to the first positioning piece 64E from the outside. If the movement continues further, the first clamper 31 continues to move, but the second clamper 32 does not move. As a result, the pitch between the first clamper 31 and the second clamper 32 is narrowed.

As shown in FIG. 13B, the movement of the robot 27 is stopped when the pitch between the first clamper 31 and the second clamper 32 is reduced to 2a. Then, the rod of the positioning cylinder 43 is advanced and inserted into the first hole 41.
As described above, the pitch between the first clamper 31 and the second clamper 32 can be changed from 2b to 2a.

  The first sleeve positioning jig 61 used in FIGS. 12 and 13 may be the second sleeve positioning jig 62.

Next, an example in which the pitch of the gripping mechanism is changed using a dedicated jig will be described.
First, first and second gripping positioning jigs 71 and 72 as shown in FIG. 14 are prepared.
As shown in FIG. 14A, the first gripping / positioning jig 71 includes a base 73 and third positioning pieces 74 and 74 standing from the base 73. The pitch of these third positioning pieces 74, 74 is 2a.
Further, as shown in FIG. 14B, the second gripping positioning jig 72 includes a base 73 and fourth positioning pieces 75 and 75 that stand from the base 73. The pitch of these fourth positioning pieces 75, 75 is 2b.

The frame body 21 shown in FIG. 5 is moved to the vicinity of the second gripping positioning jig 72 by the robot 27, and the posture is changed so that the first and second clampers 31 and 32 are in the lower position during this time. -Open the second clampers 31, 32.
The rod of the positioning cylinder 43 is pulled out from the first hole 41 just above the second gripping positioning jig 72. Thus, the slider 38 can be moved.

  In FIG. 15A, when the frame body 21 is lowered, the pitches of the first and second clampers 31 and 32 are 2a, but the positioning pieces 75 and 75 having the pitch 2b are relatively clamp claws 35 and 35. Enter in between. In this state, the first and second clampers 31 and 32 are closed.

As shown in FIG. 15B, the pitch between the first and second clampers 31 and 32 is 2b. Therefore, the rod of the positioning cylinder 43 is fitted into the second hole 42. In this state, the cylinder block is gripped and removed from the casting mold by the procedure shown in FIG.
Since the change from the pitch 2b to the pitch 2a is the same, the description thereof is omitted.

In FIGS. 14 and 15, since dedicated gripping positioning jigs 71 and 72 are used, the operation of the robot 27 is simplified.
On the other hand, in FIGS. 12 and 13, since dedicated gripping positioning jigs 71 and 72 are unnecessary, maintenance costs (device costs) can be reduced.

Next, a modified example of the present invention will be described.
As shown in FIG. 16, the first magnet 81 may be provided on the main slider 47, the second magnet 83 may be provided on the moving plate 82 with a pitch a, and the second magnet 83 may be provided with a pitch b.

  That is, the first magnet 81 may be positioned by the second magnet 83 having the pitch a, or the first magnet 81 may be positioned by the second magnet 83 having the pitch b. The rest of the configuration is the same as in FIG. 6, so the reference numerals in FIG. 6 are used and detailed description is omitted.

  In this example, the support body restraining mechanism 50 includes a first magnet 81, a moving plate 82, a second magnet 83, and an actuator 49.

  In addition, although the general purpose robot is suitable for the conveyance mechanism 27 which conveys the frame 21, it is comprised by the rail laid along the x-axis, the y-axis, and the z-axis, respectively, and the trolley | bogie which travels along these rails. May be. A swivel arm or a rotating arm may be provided on the carriage, and at least one of the x-axis, y-axis, and z-axis may be omitted. Therefore, the configuration of the transport mechanism is arbitrary as long as it operates in the same manner as the robot.

  The present invention is suitable for a sleeve setting device that sets a sleeve at a cylinder position of a casting mold.

  DESCRIPTION OF SYMBOLS 10 ... Mold for casting, 20 ... Sleeve setting apparatus, 21 ... Frame, 22 ... Sleeve support, 23 ... Sleeve, 26 ... Cylinder block of engine, 27 ... Transport mechanism (robot), 30 ... Grasping mechanism, 31 ... 1st clamper, 32 ... 2nd clamper, 46 ... rail (main rail), 48 ... perforated plate, 49 ... actuator, 50 ... support body restraining mechanism, 53, 54 ... pin hole, 55 ... pin, 61, 62 ... Sleeve positioning jig, 64, 66 ... positioning piece, 70 ... control section, 81 ... first magnet, 82 ... moving plate, 83 ... second magnet, a, b ... pitch.

Claims (5)

A sleeve setting device for setting a sleeve at a cylinder position of a casting mold for casting a cylinder block of an engine,
A transport mechanism for transporting heavy objects in three dimensions;
A frame supported by this transport mechanism;
Rails laid on this frame,
A plurality of sleeve supports movably attached to the rail and supporting the sleeve;
A support restraining mechanism that is provided on the frame and makes the sleeve support immovable at a predetermined position;
A sleeve positioning jig that is provided separately from the transport mechanism and that positions the sleeves supported by the plurality of sleeve supports at a predetermined pitch;
Prior to setting the sleeve to the casting mold, the support restraint mechanism is placed in an unrestrained state, the sleeve is placed at a predetermined pitch by the sleeve positioning jig, and the support restraint mechanism is placed in a restrained state. A sleeve setting device comprising a portion.   The sleeve setting device according to claim 1, wherein the sleeve positioning jig includes a plurality of positioning pieces standing at the predetermined pitch.   The support restraint mechanism includes a pin extending from each of the sleeve supports, a perforated plate that is movably provided in the frame and has a plurality of pin holes corresponding to the pins, and is provided in the frame. 3. The sleeve setting device according to claim 1, further comprising an actuator for moving the perforated plate to a position where the pin is disengaged from a position where the pin is fitted into the pin hole.   The support restraint mechanism includes a first magnet provided on each of the sleeve supports, a moving plate having a plurality of second magnuts movably provided on the frame and magnetically attracted to the first magnet, The sleeve setting device according to claim 1, further comprising an actuator provided on a frame and moving the moving plate to a position where the first magnet moves away from a position where the first magnet is attracted to the second magnet.   5. The frame according to claim 1, further comprising: a gripping mechanism that grips the cast cylinder block and removes the cast cylinder block from the casting mold on another surface. 6. Sleeve set device.

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