JP4392158B2 - Stamping device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a marking device for marking predetermined characters on a workpiece, in particular, a cylinder block constituting an automobile internal combustion engine.
[0002]
[Prior art]
A cylinder block is generally engraved with a management number in a pre-process for assembling an automobile internal combustion engine. This marking is performed by a stamping device.
[0003]
Examples of this type of stamping apparatus include those described in Japanese Patent Publication No. 63-61184. The stamping mechanism in this stamping apparatus includes a stamping head, a movable base for displacing the stamping head along the stamping direction, a rotation motor for rotating the stamping head, and a plurality of units installed on the stamping head. And a stamping cylinder for displacing the stamp toward the cylinder block and a stamping hammer attached to the piston rod of the stamping cylinder.
[0004]
In this engraving apparatus, first, the cylinder block conveyed by the roller conveyor is raised under the action of the lifter. In this state, the stamping hammer is displaced following the displacement of the piston rod of the stamping cylinder. As a result, the stamp is also displaced and finally comes into contact with the cylinder block. At the time of this contact, characters corresponding to the characters of the stamp are stamped on the cylinder block.
[0005]
After the first character is engraved as described above, the movable table moves by a predetermined distance under the action of the ball screw. Next, the above operation is performed again, whereby the second character is imprinted on the cylinder block. When the second character is different from the first character, the stamping head is rotated by the rotating motor so that another stamper is displaced following the stamping hammer.
[0006]
[Problems to be solved by the invention]
However, this stamping device has a lifter for lifting the cylinder block, mechanism A ball screw, a movable plate, and the like for displacing the device are required, which causes a problem that the device configuration becomes complicated. In addition, the number of parts increases with this, so that the capital investment increases.
[0007]
In addition, it has been pointed out that this engraving device has a problem that the engraved portion varies because the angle of the cylinder block with respect to the traveling direction and the mounting position on the roller conveyor cannot always be the same. Yes.
[0008]
Furthermore, if the type of cylinder block is different, a complicated operation such as changing the setting of the displacement amount of the stamping mechanism after character marking is required. In order to reduce the frequency of this operation, the same type of cylinder block is usually engraved, and then another type of cylinder block is engraved.
[0009]
In addition, while a certain type of cylinder block is engraved in the horizontal direction, another type of cylinder block may be engraved in the vertical direction. It can only be done in one direction. Therefore, in order to make it possible to mark both the horizontal direction and the vertical direction, it is necessary to install two stamping mechanisms.
[0010]
The above-mentioned defects are also apparent in other stamping apparatuses.
[0011]
The present invention has been made to solve the above-mentioned problems, and since the structure is simple, it does not cause a rise in capital investment, and it is possible to mark various types of cylinder blocks without variation. In addition, an object of the present invention is to provide a stamping device that can change the marking direction.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is provided with a positioning hole. Cylinder block A gripping mechanism that grips the gripping mechanism and the gripping mechanism gripped by the gripping portion of the gripping mechanism Cylinder block A positioning plate including a pin protruding in the X direction for positioning, and the pin after being positioned by being inserted into the hole Cylinder block A stamping device comprising a stamping mechanism for stamping character strings arranged in the X direction with respect to
The gripping mechanism directly moves the gripping part. Exchange It is possible to displace the position and direction in the X direction, Y direction and Z direction
The stamping mechanism comprises a stamping head having a stamp row in which stamps are arranged, a displacement mechanism for displacing the stamp, and a rotation urging mechanism for rotating the stamping head. And position fixing Definite And
A movable plate installed on the positioning plate so as to be movable back and forth in the X direction; and a switch for detecting that the movable plate has moved backward,
Above Cylinder block After the gripping part that grips the positioning plate is brought close to the positioning plate, the gripping part is moved in the X direction to Cylinder block By moving the gripping part in the Y direction or the Z direction, Cylinder block Until the pin is fitted into the hole of Cylinder block In sliding contact with the positioning plate,
When the pin is fitted in the hole, the Cylinder block When the switch senses that the movable plate pressed by is retracted, Cylinder block Is positioned with respect to the YZ plane,
By displacing the grip portion in the X direction, the positioning with respect to the YZ plane is performed. Cylinder block Is moved in the X direction from the positioning plate and brought close to the stamping mechanism, and then the stamp is displaced by the displacement mechanism. Cylinder block Engraved letters on
Along with displacing the grip portion in the X direction, Cylinder block By selecting a stamp having a character to be stamped next, and then displacing the stamp with the displacement mechanism Above Cylinder block Characters are marked again.
[0013]
That is, according to the present invention, the gripping mechanism and the pin Cylinder block Without positioning the stamping mechanism. Cylinder block Can be stamped. As a result A mechanism for displacing the stamping mechanism becomes unnecessary.
[0014]
Further, as the gripping mechanism, a general-purpose robot having a Cartesian coordinate system displacement type robot that can be displaced in the front-rear direction, the horizontal direction, and the vertical direction as a gripping unit can be adopted, so that the apparatus configuration can be simplified. At the same time, it is possible to suppress the increase in capital investment for the stamping device.
[0015]
Moreover, Cylinder block Since the marking is performed after positioning, it is possible to avoid variations in the marking position.
[0016]
In addition, since the gripping part can be displaced in the front-rear direction, Cylinder block When the stamp is in contact with the gripping member, the gripping portion is retracted to perform a buffering action. For this reason, since it is not necessary to provide a buffer mechanism, the structure of the stamping device is further simplified.
[0020]
And it is preferable that the stamp row | line | column of a marking apparatus has the 1st stamp row | line | column and 2nd stamp row | line | column which were mutually arrange | positioned concentrically. As a result, it is possible to engrave two or two character strings without operating either the marking mechanism or the gripping mechanism.
[0021]
Here, it is preferable that the stamping mechanism is provided with a detecting means for detecting that the stamping hammer which has finished the marking has moved backward to a position where it does not interfere with the stamping head. In this case, the stamping head can be rotated without moving the stamping hammer back to the dead point, and the stamp having the character to be stamped next can be made to face the stamping hammer. This shortens the time required for marking, so that the stamping operation can be performed efficiently.
[0022]
If the next character to be engraved is a character with a relatively small area such as “1”, for example, if the engraver is moved forward after being moved back to the dead point, the speed of the displacement mechanism becomes excessive. In some cases, the marking depth increases. In order to avoid this, it is preferable that the displacement mechanism has a stop mechanism that stops the stamping hammer that has finished marking in the middle of retreating.
[0023]
In addition, the stamping device Cylinder block And carrying means for carrying in to the position where the gripping mechanism grips, and engraved Cylinder block Unloading means for unloading Have It is preferable that in this case, Cylinder block This is because it can be easily carried in and out.
[0024]
Furthermore, said Cylinder block By further providing a monitoring device for monitoring the marking surface of the marking device, it is possible to determine whether or not accurate character marking has been performed.
[0025]
And the stamping device Cylinder block Described in the information sheet affixed to the jig supporting Cylinder block The character information to be imprinted on Cylinder block It is preferable to further have an information reading means for reading after the characters are imprinted on. This allows the characters to be engraved and Cylinder block It is possible to easily determine whether or not the characters that are actually engraved with each other match.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of an engraving apparatus according to the present invention will be described below in detail with reference to the accompanying drawings.
[0027]
FIG. 1 is a plan view of the engraving apparatus according to the present embodiment, FIG. 2 is a front view thereof, and FIG. 3 is a side view thereof. The engraving apparatus 10 includes a carry-in conveyor 12, a gripping robot 14 for gripping a cylinder block (work) conveyed by the carry-in conveyor 12, and a first positioning plate for positioning the gripped cylinder block. 16 and the second positioning plate 18, a stamping mechanism 20 for marking characters on the cylinder block transferred after being positioned between the first positioning plate 16 or the second positioning plate 18, and the gripping robot 14 And a controller 22 that controls the operation of the stamping mechanism 20 and a roller conveyor 24 that carries out the cylinder block with the markings.
[0028]
On the belt of the carry-in conveyor 12, a work support member 29 having a bottom plate 26 (see FIG. 2) and four support posts 28a to 28d extending vertically upward from the bottom plate 26 is installed. . On the other hand, as shown in FIG. 4, jigs 30 and 32 are mounted on both side surfaces of the in-line cylinder block W1, and holes corresponding to the columns 28a to 28d in the jigs 30 and 32 are provided with holes. Parts 34a to 34d are provided. The tip portions of the support columns 28a to 28d are inserted into the hole portions 34a to 34d. Note that claw holes 36 a and 36 b are provided on the outer surface of the jig 30, while claw holes 36 c and 36 d are provided on the outer surface of the jig 32.
[0029]
Here, FIG. 4 shows a so-called in-line cylinder block W1 in which cylinder bores are arranged in a straight line. In this case, FIG. 4 and FIG. 5 is a view taken in the direction of the arrow V in FIG. As described above, a recess 38 is formed by a notch on the upper left corner of the front end surface in the traveling direction of the jig 32. As will be described later, the engraving apparatus 10 includes two proximity switches 40 and 42 (see FIG. 3), and when the conveyance of the serial cylinder block W1 by the carry-in conveyor 12 is finished, the traveling direction of the jig 32 While the front end surface is detected by the proximity switch 40, the bottom surface of the recess 38 is detected by the proximity switch 42.
[0030]
For example, when the so-called V-shaped cylinder block W2 in which the cylinder bores are arranged symmetrically and inclined at a predetermined angle is engraved, as shown in FIG. You just have to wear. A concave portion 46 is provided in the lower left corner of the front end surface of the jig 44 in the direction of travel. Therefore, when the conveyance of the V-shaped cylinder block W2 is finished, the front end surface of the jig 44 in the direction of travel. Is detected by the proximity switch 42, while the bottom surface of the recess 46 is detected by the proximity switch 40.
[0031]
When marking in-line type cylinder block W3 different from the above, for example, as shown in FIG. 7, a jig provided with a recess 48 with the left corner of the front end surface in the advancing direction being cut out both vertically 50 may be attached. In this case, the proximity switches 40 and 42 detect the bottom surface of the recess 48. Further, in the case where the in-line type cylinder block W4 different from the above-mentioned two types is marked, as shown in FIG. 8, a jig 52 having no recess on the front end surface in the traveling direction may be mounted.
[0032]
As can be understood from the above, in the engraving apparatus 10 according to the present embodiment, the proximity switches 40, 42 are mounted by attaching jigs 30, 32, 44, 50, 52 having different shapes of the front end surfaces in the traveling direction. By making the patterns detected differently, it is possible to recognize that the types of cylinder blocks are different.
[0033]
As shown in FIG. 9, an information sheet 54 on which information on characters to be engraved on the cylinder block is written as a barcode B is attached to the outer surface of the jig 30.
[0034]
The first positioning plate 16 and the second positioning plate 18 are respectively supported by a first gate type frame 58 and a second gate type frame 60 that are erected on the base 56. . 1 and 2 Shown in As described above, the first gate-type frame 58 includes two support columns 62a and 64a and a support plate 66a bridged by the support columns 62a and 64a. The first positioning plate 16 is the support plate 66a. It is fixed to the upper right side surface in FIG.
[0035]
Here, a front view of the first positioning plate 16 is shown in FIG. 10, and a sectional view taken along line XI-XI in FIG. 10 is shown in FIG. As can be understood from FIG. 10, the first positioning plate 16 has first to fourth pins 68 a to 68 d embedded therein, and when the cylinder block is not in contact with the first positioning plate 16, The heads of the first to fourth pins 68 a to 68 d protrude from the contact surface of the first positioning plate 16. When the cylinder block comes into contact with the contact surface of the first positioning plate 16, each head part is lowered by compressing a coil spring (not shown), and when the cylinder block is separated from the contact surface, When the spring is extended, it returns to its original position.
[0036]
As will be described later, the first pin 68a and the third pin 68c are arranged such that the serial cylinder block W1 contacts the first positioning plate 16 and the positions of the holes H1 and H2 provided in the serial cylinder block W1. When it matches, it returns to the original position and fits into the holes H1 and H2 (see FIG. 10). On the other hand, the second pin 68b and the fourth pin 68d protrude only when the V-type cylinder block W2 comes into contact with the positions of the holes H3 and H4 of the V-type cylinder block W2, and the holes H3, Fit to H4. In other words, the first to fourth pins 68 a to 68 d protrude corresponding to the type of cylinder block that contacts the contact surface of the first positioning plate 16.
[0037]
Further, as shown in FIG. 11, a movable plate 70 a is installed on the contact surface of the first positioning plate 16. A first guide pin 72a and a second guide pin 74a are installed on the back surface (the surface opposite to the contact surface) of the movable plate 70a, and each of the first guide pin 72a and the second guide pin 74a is configured. The head end surfaces of the rods 76a and 78a are set flush with the contact surface of the movable plate.
[0038]
A collar-shaped switch member 80a is attached to the rear end of the rod 76a of the first guide pin 72a. The switch member 80a is formed by the rod 7 6 When a moves backward and reaches the dead point on the rear end side, the switch 84a of the sensor 82a is pressed. The sensor 82a is fixed to a support plate 86a attached to the back surface of the first positioning plate 16.
[0039]
A spring plunger 88a is disposed between the first guide pin 72a and the second guide pin 74a, and the tip of the movable pin 90a constituting the spring plunger 88a is located on the back surface of the movable plate 70a. Pressing. When the cylinder block does not contact, the contact surface of the movable plate 70a slightly protrudes from the contact surface of the first positioning plate 16 by this pressing.
[0040]
When the cylinder block comes into contact with the contact surface of the movable plate 70a, the movable pin 90a of the spring plunger 88a and the rods 76a and 78a of the first guide pin 72a and the second guide pin 74a are retracted. The movable plate 70 a is embedded in a step portion 92 a provided on the first positioning plate 16.
[0041]
The second gate type frame 60 is configured in the same manner as the first gate type frame 58. Therefore, the same components as those of the first gate type frame 58 in the second gate type frame 60 are denoted by the same reference numerals. In addition, b is substituted for the subscript a, and detailed description is omitted. Note that the second positioning plate 18 is disposed at a position facing the first positioning plate 16 on the upper left side surface of the support plate 66b in FIG.
[0042]
On the other hand, as shown in FIG. 12 which is a front view and FIG. 13 which is a cross-sectional view taken along line XIII-XIII of FIG. 12, fifth to eighth pins 68e to 68h are embedded in the second positioning plate 18. Has been. The heads of the fifth to eighth pins 68e to 68h are, like the first to fourth pins 68a to 68d, when the cylinder block is not in contact with the second positioning plate 18, the second positioning plate 18. When the cylinder block comes into contact, the coil spring (not shown) is compressed and lowered. Of course, when the cylinder block is separated from the contact surface, the coil spring returns to its original position by extending.
[0043]
The fifth pin 68e and the eighth pin 68h are in contact with the second positioning plate 18 with a series cylinder block W3 of a different type (different shape) from the series cylinder block W1, and the series cylinder block W3. It protrudes only when it matches the position of the holes H5 and H6, and fits into these holes H5 and H6 (see FIG. 12). On the other hand, the sixth pin 68f and the seventh pin 68g protrude only when the series cylinder block W4 of a different type (different shape) from the two types of series cylinder blocks W1 and W3 comes into contact. Fits into the holes H7 and H8 of the in-line cylinder block. That is, the fifth to eighth pins 68e to 68h also protrude corresponding to the type of cylinder block that comes into contact with the contact surface of the second positioning plate 18.
[0044]
As described above, in the first positioning plate 16, the two types of cylinder blocks W1 and W2 can be positioned by the first to fourth pins 68a to 68d. The two types of cylinder blocks W3 and W4 can be positioned by the eighth pins 68e to 68h. That is, in the stamping apparatus 10 according to the present embodiment, the four types of cylinder blocks W1 to W4 can be positioned by the first to eighth pins 68a to 68h. Of course, as described above, one of the jigs 32, 44, 50, and 52 is mounted according to the type of the cylinder block.
[0045]
Similarly to the first positioning plate 16, the second positioning plate 18 is also provided with a movable plate 70b (see FIG. 13), a first guide pin 72b, a second guide pin 74b, and a spring plunger 88b. These configurations and operations are the same as those of the movable plate 70a, the first guide pin 72a, the second guide pin 74a, and the spring plunger 88a in the first positioning plate 16, and detailed description thereof is omitted. The same applies to the switch member 80b and the sensor 82b.
[0046]
The stamping mechanism 20 is positioned and fixed to a fixed base 94 that is erected at a position substantially opposite to the gripping robot 14 with the carry-in conveyor 12 in between (see FIGS. 1 and 2). The fixed base 94 includes legs 96a and 96b extending vertically upward from the base 56 and a fixed plate 98 bridged between the legs 96a and 96b. Is attached. The leg portions 96a and 96b are connected to the support portion 64a of the first gate type frame 58 and the support portion 64b of the second gate type frame 60 by reinforcing frames 100a and 100b, respectively.
[0047]
Here, a schematic front view of the stamping mechanism 20 is shown in FIG. 14, and a schematic cross section is shown in FIG. This stamping mechanism 20 includes a stamping head 106 having a first stamper row 102 and a second stamper row 104 arranged concentrically with each other, and an inner peripheral stamper 108 or an outer peripheral stamper 110 in a cylinder block. A first impact cylinder 112 and a second impact cylinder 114 for displacing toward the side, a servo motor 116 for rotating the stamping head 106, the stamping head 106, the first impact cylinder 112, the first And a support main body 118 for supporting the impact cylinder 114 and the servo motor 116.
[0048]
Among these, the proximity switch 120 is fixed to the bottom surface of the recess 119 in the stamping head 106 by a nut 121. When the proximity switch 120 faces the proximity switch 122 installed on the support main body 118, the control unit 22 (see FIG. 1) recognizes that “the stamping head 106 is at the origin position”.
[0049]
Further, an inner peripheral side through-hole 124 (FIG. 1) for inserting the inner peripheral side stamper 108 constituting the first stamper row 102 into the stamping head 106. 5 And an outer peripheral side through-hole 126 for inserting the outer peripheral side stamping element 110 constituting the second stamping element row 104. The inner peripheral side through hole 124 is disposed so as to be positioned between the outer peripheral side through holes 126. Therefore, the inner peripheral side stamp 108 is positioned between the outer peripheral side stamps 110. To do.
[0050]
The outer peripheral stamp 110 includes a large-diameter portion 128 having a curved end surface facing the first impact cylinder 112 or the second impact cylinder 114, and a small-diameter portion 130 having predetermined characters engraved on the end surface protruding from the embossing head 106. Among them, one end portion of a coil spring 132 surrounding the small-diameter portion 130 of the outer peripheral side stamp 110 is seated on the distal end surface of the large-diameter portion 128. The other end portion of the coil spring 132 is in contact with a stepped portion 134 provided in the outer peripheral side through hole 126.
[0051]
The above configuration is the same with respect to the inner peripheral side through hole 124 and the inner peripheral side stamp 108, and therefore, the same reference numerals are assigned to the above-described components, and detailed description thereof is omitted.
[0052]
The outer peripheral stamp 110 or the inner peripheral stamp 108 is displaced by either the first impact cylinder 112 or the second impact cylinder 114. For example, the first impact cylinder 112 is configured so that the outer peripheral side stamp 110 or the inner peripheral side stamp 108 is inserted through the rod 136a, the connecting rod 138a, and the stamping hammer 140a shown in FIG. Press.
[0053]
First, a screw portion 142a is provided at the tip of the rod 136a, and the screw portion 142a is screwed into a screw hole 144a provided in a rear end portion of the connecting rod 138a. The connecting rod 138a is provided with a screw hole 145a, and the rod 136a is prevented from coming off from the connecting rod 138a by being pressed by the screw 146a screwed into the screw hole 145a.
[0054]
An annular groove 147a is provided in the side peripheral wall portion at the distal end portion of the connecting rod 138a. On the other hand, the main body member 148a constituting the embossing hammer 140a has a flat plate-like wide portion 150a, an inclined portion 151a inclined in a tapered shape, and a pressing tip portion 152a having a substantially rectangular parallelepiped shape. The portion 150a is provided with a recess 155a having two claw portions 154a and 154a. The connecting rod 138a is connected to the stamping hammer 140a by fitting the tip portion of the connecting rod 138a into the recess 155a and fitting the claw portions 154a and 154a into the annular groove 147a.
[0055]
When the rod 136a of the first impact cylinder 112 moves forward, the pressing tip 152a of the main body member 148a is attached to either the outer peripheral stamp 110 or the inner peripheral stamp 108 as shown in FIGS. Abut and press them. Note that the thickness t of the pressing tip 152a is slightly smaller than the diameters of the outer peripheral stamp 110 and the inner peripheral stamp 108, so that the pressing tip 152a is formed on the outer peripheral stamp 110 and the inner peripheral side. It does not contact both of the stamps 108 at the same time.
[0056]
In addition to the main body member 148a, the stamping hammer 140a has a dog member 158a in which a proximity dog portion 156a protrudes upward in FIG. The dog member 158a is connected to the main body member 148a by screws 159 and 159.
[0057]
Here, in the support main body 118 (see FIG. 15), a cover member 166a in which proximity switches 160a, 162a, and 164a are installed is mounted in a sliding hole in which the stamping hammer 140a slides. When the stamping hammer 140a moves forward, the proximity dog portion 156a passes through the installation locations in the order of the proximity switches 164a, 162a, and 160a.
[0058]
The configuration of the second impact cylinder 114 is the same as that of the first impact cylinder 112. Therefore, the same reference numerals are assigned to the same components, and b is substituted for the subscript a, and detailed description thereof is omitted.
[0059]
A rotating shaft 168 is inserted in a substantially central portion of the support main body 118 that is a hollow body. A cap member 170 is connected to the tip of the rotary shaft 168, and the large diameter portion 172 of the cap member 170 is laminated on a part of the bottom surface of the recess 174 in the stamping head 106. Further, a spacer 178 and a nut 179 are screwed into the threaded portion 176 protruding from the cap member 170, thereby preventing the rotating shaft 168 from coming off from the embossing head 106. The end surface of the spacer 178 is seated on the bottom surface of the recess provided in the cap member 170, and the end surface of the nut 179 is seated on the surface of the spacer 178 and the large diameter portion 172 of the cap member 170.
[0060]
A gear 180 is fitted on the outer periphery of the rear end of the rotating shaft 168. The gear 180 meshes with a gear 184 fitted to the drive shaft 182 of the servo motor 116. That is, the embossing head 106 rotates following the drive shaft 182 of the servo motor 116 being urged to rotate under the control action of the control unit 22.
[0061]
A first monitor camera 185 supported by a frame (not shown) is disposed above the vicinity of the marking mechanism 20 (see FIG. 3).
[0062]
The gripping robot 14 (see FIG. 3) includes a rotatable robot main body 187 installed on a base 186, a first arm 188 that rotates with a connecting portion of the robot main body 187 as a fulcrum, A second arm part 190 that rotates about a connection part with the first arm part 188 as a fulcrum; and a clamp part 192 that can pivot about the connection part with the second arm part 190 as a fulcrum. The unit 192 is displaced in the X-axis (horizontal left-right direction), Y-axis (front-rear direction) and Z-axis direction (vertical vertical direction) in FIGS. 2 and 3 under the control action of the gripping robot 14. Such a gripping robot 14 is available as a general-purpose product.
[0063]
The clamp part 192 has two clamp plates 194 and 196 that approach or separate from each other synchronously, and two gripping claws 198a and 198b are provided on the inner walls of the clamp plates 194 and 196, respectively. Yes. Note that the gripping claws 198 a and 198 b of one clamp plate 194 extend to face the gripping claws 198 a and 198 b of the other clamp plate 196.
[0064]
The proximity switches 40, 42 for detecting whether or not any of the recesses 38, 46, 48 is provided on the front end surface in the traveling direction of the jigs 30, 32, 44, 50, 52 (see FIGS. 4 to 8). Is positioned at the distal end portion of a bending fixture 202 which is installed on the leg portion 200 of the carry-in conveyor 12 and has a bending portion (see FIG. 3). At the tip, the proximity switch 40 is arranged in the vertical direction and the proximity switch 42 is arranged in the vertical direction.
[0065]
The roller conveyor 24 (see FIGS. 2 and 3) has a plurality of rollers 204 that rotate in synchronization with each other under the control of a motor (not shown), and a pallet 206 is placed on the rollers 204. Yes. The pallet 206 includes a support base 208, a bottom plate 210, and a mounting base 212 erected on the bottom plate 210 (see FIG. 3).
[0066]
Figure 2 A second monitor camera 214 supported by a gantry (not shown) is disposed on the right side of the roller conveyor 24 in FIG. The second monitor camera 214 is for reading the barcode B described on the information sheet 54 attached to the jig 32.
[0067]
In the above configuration, the carry-in conveyor 12, the proximity switches 40, 42, 160a, 162a, 164a, 160b, 162b, 164b, the gripping robot 14, the servo motor 116, the first impact cylinder 112, the second impact cylinder 114, and the roller conveyor 24. Are electrically connected to the control unit 22 by lead wires (not shown).
[0068]
The embossing device 10 according to the present embodiment is basically configured as described above, and the effects thereof will be described next.
[0069]
When marking the serial cylinder block W1 with the stamping apparatus 10 having the above-described configuration, first, jigs 30 and 32 (see FIG. 4) are mounted on the serial cylinder block W1, and the jig 30, The pillars 28a to 28d of the work support member 29 are inserted into the 32 holes 34a to 34d.
[0070]
Next, by energizing the carry-in conveyor 12, the serial cylinder block W <b> 1 is transferred together with the work support member 29 between the first gate type frame 58 and the second gate type frame 60. When the belt of the carry-in conveyor 12 moves a predetermined distance, the control unit 22 sends a control signal to the carry-in conveyor 12 via the lead wire to stop the belt. Thereby, the transfer of the in-line cylinder block W1 is completed.
[0071]
When the in-line cylinder block W1 is completely loaded, the front end surface of the jig 32 in the traveling direction is detected by the proximity switch 40 as the jig 32 approaches the proximity switches 40 and 42, and the concave portion 38 is formed. Detected by the proximity switch 42. In response to the detection result by the proximity switches 40 and 42, the control unit 22 recognizes that “the transferred cylinder block is the serial cylinder block W1 to which the jig 32 is mounted”.
[0072]
Next, the control unit 22 issues a command signal “gripping the cylinder block” to the gripping robot 14. Upon receiving this command signal, the gripping robot 14 is interposed between the two clamp plates 194 and 196 of the clamp unit 192 such that the side surface portion in the traveling direction of the serial cylinder block W1 is separated by a predetermined distance. The robot body 187, the first arm 188, the second arm 190, and the clamp 192 are rotated or turned.
[0073]
After the clamp plates 194 and 196 are arranged on the side surface portion in the traveling direction of the in-line cylinder block W1, the control unit 22 outputs a command signal “displace the clamp plates 194 and 196 to the cylinder block side in synchronization with each other”. To emit. When the interval between the clamp plates 194 and 196 is reduced, the gripping claws 198a and 198b of the clamp plates 194 and 196 are fitted into the claw holes 36a to 36d of the jigs 30 and 32, whereby the in-line cylinder block W1. Is gripped by the clamp plates 194 and 196.
[0074]
Next, the control unit 22 issues a command signal that “the cylinder block is raised and transferred between the first positioning plate 16 and the second positioning plate 18”. The gripping robot 14 that has received this command signal raises the in-line cylinder block W1 by rotating or turning the first arm unit 188, the second arm unit 190, and the clamp unit 192, The first positioning plate 16 and the second positioning plate 18 are disposed.
[0075]
In this state, the clamp portion 192 moves in the horizontal direction along the X axis shown in FIGS. 2 and 3 until the rear end surface in the moving direction of the in-line cylinder block W1 contacts the contact surface of the first positioning plate 16. To do. The heads of the first to fourth pins 68a to 68d of the first positioning plate 16 are lowered by the contact of the in-line cylinder block W1.
[0076]
Next, the clamp part 192 is moved along the Y-axis direction or the Z-axis direction under the control action of the control part 22, whereby the advancing direction rear end face of the in-line cylinder block W <b> 1 is brought into contact with the first positioning plate 16. Slid into contact. When the position of the first pin 68a and the third pin 68c coincides with the positions of the holes H1 and H2 provided in advance in the advancing direction rear end surface of the in-line cylinder block W1 during the sliding contact, the first pin The heads of the 68a and the third pin 68c return to their original positions when the coil spring (not shown) is extended. That is, the heads of the first pin 68a and the third pin 68c are fitted in the holes H1 and H2 of the series cylinder block W1 (see FIG. 10), whereby the series cylinder block W1 is used for the first positioning. While being positioned on the plate 16, a portion to be marked faces the stamping head 106 side of the stamping mechanism 20. The above operation is performed in a state where the in-line cylinder block W1 is separated from the second positioning plate 18.
[0077]
Simultaneously with this positioning, the movable plate 70a of the first positioning plate 16 is pressed from the in-line cylinder block W1. With this pressing, the rods 76a and 78a of the first guide pin 72a and the second guide pin 74a are retracted, so that the switch member 80a presses the switch 84a of the sensor 82a. After sensing that the switch 84a is pressed, the sensor 82a issues a signal “cylinder block positioning complete” to the control unit 22.
[0078]
Upon receipt of this signal, the control unit 22 issues a command signal “moves the cylinder block horizontally to the position of the marking head 106” to the gripping robot 14. According to this command signal, the clamp portion 192 of the gripping robot 14 is displaced in the horizontal direction, so that the portion to be stamped in the in-line cylinder block W1 faces the stamping head 106.
[0079]
Next, the control unit 22 sends a control signal “start rotation energization of the drive shaft 182” to the servo motor 116 to rotate the drive shaft 182 to rotate the rotation shaft 168 and the marking head 106. Let In this case, the embossing head 106 is first rotated so that the origin position, specifically, the proximity switch 120 is at a position facing the proximity switch 122.
[0080]
Next, the control unit 22 is configured such that the outer circumferential stamp 110 on which the first stamped letter is engraved is positioned to face the pressing tip 152a of the stamping hammer 140a connected to the first impact cylinder 112. The engraving head 106 is rotated. In other words, the outer peripheral stamp 110 is indexed.
[0081]
In this state, the control unit 22 issues a command signal “advance the rod 136a of the first impact cylinder 112”. When the rod 136a moves forward in accordance with this command signal, the stamping hammer 140a is displaced toward the outer stamper 110 through the connecting rod 138a, and finally the pressing tip 152a is larger than the outer stamper 110. After contacting the rear end surface of the diameter portion 128, the rear end surface is pressed (see FIG. 17). As a result, the outer peripheral stamp 110 moves forward toward the in-line cylinder block W1, and the characters engraved on the outer peripheral stamp 110 are stamped on the in-line cylinder block W1. It should be noted that the impact when the outer peripheral stamp 110 comes into contact with the in-line cylinder block W1 is mitigated by the backward movement of the clamp portion 192 along the Y-axis direction. That is, the gripping robot 14 also serves as a buffer mechanism.
[0082]
At this time, the coil spring 132 is compressed by being pressed by the large diameter portion 128 and the stepped portion 134. Further, the control section 22 receives a signal from the proximity switch 160a installed on the cover member 166a that the proximity switch 160a detects the proximity dog portion 156a of the connecting rod 138a, so that the stamping hammer 140a moves forward. Sense that.
[0083]
After the in-line cylinder block W1 is engraved, the coil spring 132 is expanded when the rod 136a is retracted in response to a command signal issued by the control unit 22 to "retract the rod 136a of the first impact cylinder 112". As the large-diameter portion 128 is elastically urged, the outer peripheral stamp 110 moves backward. As a result, the outer peripheral stamp 110 returns to the original position.
[0084]
Here, when the proximity switch 160a detects the proximity dog portion 156a again as the rod 136a moves backward, the control unit 22 reads: “Because the stamping hammer 140a has moved back to a position where it does not interfere with the stamping head 106. It is possible to rotate the embossing head 106 ”. Then, the control unit 22 again sends a control signal “start rotation energization of the drive shaft 182” to the servo motor 116, and rotates the drive shaft 182 to rotate the rotation shaft 168 and the marking head 106. Then, the inner peripheral stamp 108 to be engraved next is indexed. In this way, the indexing is performed during the backward movement of the stamping hammer 140a, so that the working time can be shortened. As a result, the stamping work can be efficiently performed.
[0085]
When the rod 136a is moved back to the dead point, if the next letter to be engraved has a relatively small area such as “1”, the speed at which the rod 136a moves forward becomes excessively large. The depth may increase. In order to avoid such a situation, in this embodiment, when the character to be engraved next has a relatively small area, when the proximity switch 162a detects the proximity dog portion 156a of the marking hammer 140a. The backward movement of the rod 136a is terminated.
[0086]
Thereafter, in the same manner as described above, when the rod 136a moves forward in accordance with a command signal issued by the control unit 22 to “advance the rod 136a of the first impact cylinder 112”, the stamping hammer 140a presses the inner peripheral stamper 108. Finally (see FIG. 18), finally, the characters engraved on the inner circumferential stamp 108 are imprinted on the in-line cylinder block W1. Note that this character is positioned below the character stamped by the outer stamper 110 in the above operation.
[0087]
As described above, when the proximity switch 162a detects the proximity dog portion 156a of the marking hammer 140a, the backward movement of the rod 136a is terminated, compared with the case where the rod 136a is retracted to the dead point. Since the final speed of 140a becomes slow, the pressing force of the stamping hammer 140a on the inner peripheral stamp 108 becomes small. For this reason, it is possible to avoid an increase in the marking depth when marking a relatively small area of characters. That is, according to this marking apparatus 10, the marking depth of a large area character and the marking depth of a small area character can be made substantially the same.
[0088]
Thereafter, in response to a command signal issued by the control unit 22 to “retract the rod 136a of the first impact cylinder 112”, the rod 136a retracts, and the inner peripheral stamp 108 returns to its original position.
[0089]
If the character to be engraved next has a relatively large area, the rod 136a may be retracted to the dead point. In this case, when the proximity switch 164a detects the proximity dog portion 156a, it is recognized that the rod 136a has retracted to the dead point. If the character to be engraved next has a relatively small area, similarly to the above, the backward movement of the rod 136a may be stopped when the proximity switch 162a detects the proximity dog portion 156a.
[0090]
Next, the control unit 22 issues a command signal “displace the cylinder block in the horizontal direction” to the gripping robot 14. The gripping robot 14 moves the clamp unit 192 slightly horizontally along the X-axis direction in accordance with this command signal. As a result, the portion to be stamped next to the in-line cylinder block W1 faces the stamping head 106. In parallel with this operation, on the stamping mechanism 20 side, the outer peripheral stamp 110 on which the character to be stamped next is engraved is indexed.
[0091]
Thus, in the present embodiment, the marking can be sequentially performed without displacing the stamping mechanism 20. That is, since a mechanism for displacing the stamping mechanism 20 is unnecessary, the apparatus configuration can be simplified.
[0092]
Thereafter, in the same manner as described above, the rod 136a moves forward in accordance with a command signal issued by the control unit 22 to “advance the rod 136a of the first impact cylinder 112”. Following this, the outer peripheral stamp 110 moves forward toward the in-line cylinder block W1, and as a result, the character engraved on the outer peripheral stamp 110 is placed next to the first stamped character. Stamped on. Next, in response to a command signal issued by the control unit 22 to “retract the rod 136a of the first impact cylinder 112”, the rod 136a retracts, and the outer peripheral stamp 110 returns to its original position.
[0093]
By repeatedly performing the above operations, a two-stage character string is imprinted in the horizontal direction of the in-line cylinder block W1. Note that whether or not the characters are correctly stamped is monitored by the operator via the first monitor camera 185.
[0094]
As can be understood from the above, in the stamping apparatus 10 according to the present embodiment, the in-line cylinder block W1 once positioned by the first positioning plate 16 is marked. For this reason, the same type of inline cylinder block W1 can be engraved at the same location. Moreover, it is possible to carry out two-stage marking without displacing the stamping mechanism 20.
[0095]
In addition, a displacement mechanism for displacing the stamping mechanism 20 is not necessary, and a commercially available general-purpose robot may be adopted as the gripping robot 14, so that the configuration of the stamping device 10 can be simplified. . In addition, by adopting a relatively inexpensive general-purpose robot, it is possible to suppress an increase in equipment investment for the stamping apparatus 10.
[0096]
The inline cylinder head W1 with the engraving is placed on the placement base 212 of the pallet 206 placed on the roller conveyor 24 as the robot body 187 of the gripping robot 14 turns, and is carried out. The At this time, the operator monitors with the second monitor camera 214 whether or not the value of the barcode B is the same as the engraved character.
[0097]
When marking is made on the V-type cylinder block W2 (see FIG. 10), an operation substantially similar to the above is performed. In this case, jigs 30 and 44 (see FIG. 6) are attached to the side surface of the V-shaped cylinder block W2. Then, when the loading of the V-shaped cylinder block W2 is finished, the front end surface in the traveling direction of the jig 44 is detected by the proximity switch 42 as the jig 44 approaches the proximity switches 40 and 42 (see FIG. 3). On the other hand, the bottom surface of the recess 46 is detected by the proximity switch 40. In response to this detection result, the control unit 22 recognizes that “the cylinder block that is carried in is the V-type cylinder block W2 to which the jigs 30 and 44 are attached”.
[0098]
The side surface portion of the V-shaped cylinder block W2 gripped by the clamp portion 192 of the gripping robot 14 is brought into sliding contact with the contact surface of the first positioning plate 16. In this case, the V-shaped cylinder block W2 is positioned by fitting the second pin 68b and the fourth pin 68d into the holes H3 and H4 in the side surface of the V-shaped cylinder block W2.
[0099]
Thereafter, in the same manner as described above, the V-shaped cylinder block W2 is moved in the horizontal direction so as to face the embossing head 106, and then the V-shaped cylinder block W2 is marked.
[0100]
Next, the case where marking is performed on an in-line cylinder block W3 (see FIG. 12) different from the in-line cylinder block W1 will be described as an example.
[0101]
In this case, the in-line cylinder block W3 is transported by the work support member 29 on the carry-in conveyor 12 with the jigs 30 and 50 (see FIG. 7) attached. When the bottom of the concave portion 48 of the jig 50 is detected by the proximity switches 40 and 42 when the conveyance is finished, the control unit 22 receives the detection result, and “the loaded cylinder block is the jig 30, 50. Is an in-line cylinder block W3 mounted ".
[0102]
This series-type cylinder block W3 is lifted together with the jigs 30 and 50 between the first positioning plate 16 and the second positioning plate 18 under the action of the gripping robot 14, and then the clamp portion 192 is moved to the X axis. By moving in the direction (horizontal direction), it comes into contact with the contact surface of the second positioning plate 18. Thereafter, as the clamp portion 192 moves in the Y-axis direction (front-rear direction) and the Z-axis direction (vertical vertical direction), the in-line cylinder block W3 slides on the contact surface.
[0103]
Of the heads of the fifth to eighth pins 68e to 68h lowered by the contact of the inline cylinder block W3, the heads of the fifth pin 68e and the eighth pin 68h are on the side surface of the inline cylinder block W3. When the positions of the provided holes H5 and H6 match, the coil spring (not shown) expands to return to the original position and fit into the holes H5 and H6. As a result, the in-line cylinder block W3 is positioned on the second positioning plate 18, and the portion to be stamped faces the stamping head 106 side of the stamping mechanism 20.
[0104]
Simultaneously with this positioning, the movable plate 70b of the second positioning plate 18 is pressed from the in-line cylinder block W3. With this pressing, the rods 76b and 78b of the first guide pin 72b and the second guide pin 74b are retracted, so that the switch member 80b presses the switch 84b of the sensor 82b. After sensing that the switch 84b has been pressed, the sensor 82b issues a signal “cylinder block positioning complete” to the control unit 22.
[0105]
Upon receipt of this signal, the control unit 22 issues a command signal “moves the cylinder block horizontally to the position of the marking head 106” to the gripping robot 14. In accordance with this command signal, the clamp portion 192 of the gripping robot 14 moves forward along the Y-axis direction, so that the portion to be stamped in the in-line cylinder block W3 faces the stamping head 106.
[0106]
Next, the control unit 22 rotates the rotating shaft 168 and the stamping head 106 by energizing the drive shaft 182 of the servo motor 116 in the same manner as when the inline cylinder block W1 is marked, The stamping head 106 is set as the origin position.
[0107]
Then, under the control action of the control unit 22, a position where the outer peripheral side stamp with the first stamped character is opposed to the pressing tip 152 a of the stamping hammer 140 b connected to the second impact cylinder 114, Thus, the outer peripheral stamp 110 is indexed.
[0108]
In this state, the control unit 22 issues a command signal “advance the rod 136b of the second impact cylinder 114”. When the rod 136b of the second impact cylinder 114 moves forward in accordance with this command signal, the stamping hammer 140b is displaced toward the outer peripheral stamper 110 via the connecting rod 138b as described above, and finally the flat tip end. After the portion 158b comes into contact with the rear end surface of the large-diameter portion 128 of the outer peripheral side stamp 110, the rear end surface is pressed. As a result, the outer peripheral stamp 110 moves forward toward the in-line cylinder block W3, and the characters engraved on the outer peripheral stamp 110 are stamped on the in-line cylinder block W3. At this time, the coil spring 132 is compressed by being pressed by the large diameter portion 128 and the stepped portion 134. Further, the control unit 22 receives the signal from the proximity switch 160b installed on the cover member 166b that the proximity switch 160b detects the proximity dog portion 156b of the connecting rod 138b, so that the embossing hammer 140b moves forward. Sense that.
[0109]
After the inline cylinder block W3 is engraved, the coil spring 132 expands when the rod 136b is retracted in response to a command signal issued by the control unit 22 "retract the rod 136b of the second impact cylinder 114". As the large-diameter portion 128 is elastically urged, the outer peripheral stamp 110 moves backward. As a result, the outer peripheral stamp 110 returns to the original position.
[0110]
In this case, when the proximity switch 160b re-detects the proximity dog portion 156b as the rod 136b moves backward, the control unit 22 reads “Because the stamping hammer 140b has moved back to a position where it does not interfere with the stamping head 106. It is possible to rotate the embossing head 106 ”. Then, the control unit 22 again sends a control signal “start rotation energization of the drive shaft 182” to the servo motor 116, and rotates the drive shaft 182 to rotate the rotation shaft 168 and the marking head 106. Then, the inner peripheral stamp 108 to be engraved next is indexed. As described above, it is possible to shorten the work time by performing indexing in the middle of the backward movement of the stamping hammer 140b, so that the stamping work can be performed efficiently.
[0111]
When the next character to be engraved has a relatively small area such as “1”, in order to make the engraving depth uniform, the proximity switch 162b is used as in the case where the first impact cylinder 112 is engraved. The retraction of the rod 136b may be terminated when the proximity dog portion 156b of the stamping hammer 140b is detected.
[0112]
After receiving the signal “retracting of the rod 136b” from the second impact cylinder 114, the control unit 22 sends again a control signal “starting rotation energization of the drive shaft 182” to the servo motor 116. By rotating and energizing 182, the rotary shaft 168 and the stamping head 106 are rotated, and the inner peripheral stamp 108 to be stamped next is indexed.
[0113]
Next, when the rod 136b of the second impact cylinder 114 moves forward in accordance with a command signal issued by the control unit 22 to "advance the rod 136b of the second impact cylinder 114", the inner peripheral side stamp 108 is connected to the inline cylinder block. A forward movement is made in the direction of W3, and the characters engraved on the inner circumferential stamp 108 are imprinted on the in-line cylinder block W3. Note that this character is positioned in a step next to the character stamped as described above by the outer peripheral stamp 110. Thereafter, in response to a command signal issued by the control unit 22 “retract the rod 136b of the second impact cylinder 114”, the rod 136b retracts, and the inner peripheral stamp 108 returns to its original position.
[0114]
If the character to be engraved next has a relatively large area, the rod 136b may be retracted to the dead point. In this case, when the proximity switch 164b detects the proximity dog portion 156b, it is recognized that the rod 136b has retracted to the dead point. If the character to be engraved next has a relatively small area, the backward movement of the rod 136b may be stopped when the proximity switch 162b detects the proximity dog portion 156b as described above.
[0115]
Next, the gripping robot 14 slightly lowers the clamp unit 192 in accordance with a command signal issued by the control unit 22 to “displace the cylinder block vertically downward”. As a result, the portion to be stamped next to the in-line cylinder block W3 faces the stamping head 106. In parallel with this operation, on the stamping mechanism 20 side, the outer peripheral stamp 110 on which the character to be stamped next is engraved is indexed.
[0116]
Then, the rod 136b of the second impact cylinder 114 moves forward in accordance with a command signal issued by the control unit 22 to “advance the rod 136b of the second impact cylinder 114”. Following this, the outer circumferential stamp 110 moves forward toward the in-line cylinder block W3. As a result, the character engraved on the outer circumferential stamp 110 is positioned above the first stamped character. Stamped on. Thereafter, in response to a command signal issued by the control unit 22 “retract the rod 136 b of the second impact cylinder 114”, the rod 136 b is retracted, and the outer peripheral stamp 110 is returned to the original position.
[0117]
By repeating the above operation, two character strings are engraved in the vertical direction of the in-line cylinder block W3.
[0118]
Thus, in this stamping apparatus 10, it is not necessary to displace the stamping mechanism 20 according to the type of cylinder block. For this reason, since a displacement mechanism for displacing the stamping mechanism 20 is unnecessary, the apparatus configuration can be simplified. Moreover, in this stamping apparatus 10, the marking direction can be changed to either the horizontal direction or the vertical direction as necessary.
[0119]
That is, the stamping apparatus 10 according to the present embodiment can stamp a plurality of types of cylinder blocks while having a simple configuration, and can also change the stamping direction.
[0120]
Finally, when marking is performed on an in-line type cylinder block W4 (see FIG. 12) different from the two in-line type cylinder blocks W1, W3, 30, 52 (see FIG. 8) are mounted. When the in-line cylinder block W4 is completely loaded, the front end surface of the jig 52 in the traveling direction is detected by the proximity switches 40 and 42 as the jig 52 approaches the proximity switches 40 and 42. Upon receipt of this detection result, the control unit 22 recognizes that “the cylinder block that is carried in is the in-line cylinder block W4 to which the jigs 30 and 52 are mounted”.
[0121]
Thereafter, substantially the same operation is performed as in the case of marking the in-line cylinder block W1. That is, the in-line cylinder block W4 is lifted together with the jigs 30 and 52 between the first positioning plate 16 and the second positioning plate 18 under the action of the gripping robot 14, and then the second positioning block After being brought into contact with the contact surface of the plate 18, it is slid on the corresponding contact surface.
[0122]
Of the heads of the fifth to eighth pins 68e to 68h lowered by the contact of the inline cylinder block W4, the heads of the sixth pin 68f and the seventh pin 68g are on the side surface of the inline cylinder block W4. When the positions of the provided holes H7 and H8 coincide with each other, the coil spring (not shown) expands to return to the original position and fit into the holes H7 and H8. As a result, the in-line cylinder block W4 is positioned on the second positioning plate 18, and a portion to be stamped faces the stamping head 106 side of the stamping mechanism 20.
[0123]
At the same time, the rods 76b and 78b of the first guide pin 72b and the second guide pin 74b are retracted as the movable plate 70b of the second positioning plate 18 is pressed from the series cylinder block. At this time, the sensor 82b senses that the switch member 80b has pressed the switch 84b, and issues a signal indicating “completion of positioning of the cylinder block” to the control unit 22.
[0124]
Then, the control unit 22 issues a command signal “moves the cylinder block horizontally to the position of the marking head 106” to the gripping robot 14. The clamp portion 192 of the gripping robot 14 is displaced in the horizontal direction in accordance with this command signal, so that the portion to be marked in the in-line cylinder block W4 faces the stamping head 106.
[0125]
Next, after the stamping head 106 was rotated to the origin position under the control action of the control unit 22, the outer peripheral stamp 110 with the first stamped characters was connected to the first impact cylinder 112. The outer peripheral stamp 110 is indexed so as to face the pressing tip 152a of the stamping hammer 140a.
[0126]
In this state, when the rod 136a of the first impact cylinder 112 moves forward in accordance with a command signal issued by the control unit 22 to “advance the rod 136a of the first impact cylinder 112”, as in the above case, the outer peripheral stamp 110 Moves forward toward the cylinder block, and the characters engraved on the outer circumferential stamp 110 are imprinted on the cylinder block. Further, the control unit 22 receives a signal that the proximity switch 160a detects the proximity dog portion 156a of the connecting rod 138a from the proximity switch 160a installed on the cover member 166a, thereby performing “completion of marking on the cylinder head”. Sense.
[0127]
The stamping mechanism 20 operates in the same manner as the case where the in-line type cylinder block W1 and the V-type cylinder block W2 are stamped. Apply.
[0128]
Thus, the stamping apparatus 10 according to the present embodiment can stamp the four types of cylinder blocks W1 to W4 without displacing the positions of the stamping mechanism 20 and other mechanisms. Moreover, since the position of the stamping mechanism 20 is unchanged, the same type of cylinder block can be marked at the same position.
[0129]
The stamping apparatus 10 according to the present embodiment is compatible with four types of cylinder blocks W1 to W4, but increases the number of pins installed on the first positioning plate 16 or the second positioning plate 18. Needless to say, it becomes possible to cope with various types of cylinder blocks.
[0130]
In the above-described embodiment, the case where the four types of cylinder blocks W1 to W4 are engraved has been described as an example, but it is needless to say that a workpiece other than the cylinder block may be used.
[0131]
【The invention's effect】
As described above, according to the stamping apparatus according to the present invention, after the workpiece gripped by the gripping mechanism is positioned, marking is sequentially performed without displacing the stamping mechanism. For this reason, since a mechanism for displacing the stamping mechanism is unnecessary, the apparatus configuration can be simplified. In addition, by adopting a general-purpose robot as the gripping mechanism, it is possible to suppress an increase in capital investment for the stamping apparatus.
[0132]
In addition, in this stamping apparatus, marking is performed after the workpiece is positioned, so that it is possible to avoid variations in the marking position.
[Brief description of the drawings]
FIG. 1 is a plan view of an engraving apparatus according to the present embodiment.
FIG. 2 is a front view of the stamping device of FIG. 1;
FIG. 3 is a side view of the stamping device of FIG. 1;
FIG. 4 is a plan view showing a state in which jigs for determining the type of cylinder block are mounted on both side surfaces of the in-line cylinder block.
5 is a view in the direction of the arrow V in FIG.
6 is an enlarged perspective view of a main part of a jig for discriminating the type of cylinder block and having a different shape from that shown in FIGS. 4 and 5. FIG.
7 is an enlarged perspective view of a main part of a jig for discriminating the type of cylinder block and having a shape different from that shown in FIGS. 4 to 6. FIG.
8 is an enlarged perspective view of a main part of a jig for discriminating the type of cylinder block and having a shape different from that shown in FIGS. 4 to 7. FIG.
FIG. 9 is a plan view showing a state in which an information sheet on which information on characters to be engraved on a cylinder block is written as a bar code is attached to a jig.
FIG. 10 is a front view of a first positioning plate (first positioning member).
11 is a cross-sectional view taken along line XI-XI in FIG.
FIG. 12 is a front view of a second positioning plate (second positioning member).
13 is a cross-sectional view taken along line XIII-XIII in FIG.
FIG. 14 is a schematic front view of a stamping mechanism.
15 is a schematic cross-sectional view of the stamping mechanism of FIG.
16 is a partial cross-sectional schematic front view of a stamping hammer constituting the stamping mechanism of FIG.
FIG. 17 is a schematic front view showing a state where the pressing tip of the stamping hammer presses the outer peripheral stamp.
FIG. 18 is a schematic front view showing a state in which the pressing tip of the stamping hammer presses the inner peripheral stamp.
[Explanation of symbols]
10 ... Stamping device 12 ... Carry-in conveyor
14 ... Gripping robot 16, 18 ... Positioning plate
20 ... Stamping mechanism 22 ... Control unit
24 ... Roller conveyor 29 ... Work support member
30, 32, 44, 50, 52 ... jigs 34a to 34d ... hole
36a-36d ... Holes for claws 38, 46, 48 ... Recesses
40, 42, 120, 122, 160a, 160b, 162a, 162b, 164a, 164b ... Proximity switch
54 ... Information sheet 58, 60 ... Gate type frame
68a-68h ... 1st-8th pin 70a, 70b ... Movable plate
82a, 82b ... sensors 84a, 84b ... switches
102, 104 ... stamped row 106 ... stamping head
108, 110 ... stamping element 112, 114 ... impact cylinder
116: Servo motor 132 ... Coil spring
136a, 136b ... rod 138a, 138b ... connecting rod
140a, 140b ... stamping hammer 152a, 152b ... tip for pressing
156a, 156b ... proximity dog portion 166a, 166b ... cover member
168 ... Rotating shaft 180, 184 ... Gear
182 ... Drive shaft 185, 214 ... Monitor camera
192: Clamp section 194, 196: Clamp plate
198a, 198b ... gripping claws 204 ... rollers
206 ... Pallet B ... Barcode
H1-H8 ... Hole W1-W4 ... Cylinder block

Claims (7)

A positioning mechanism including a gripping mechanism for gripping a cylinder block in which a positioning hole is formed, and a positioning plate including a pin projecting in the X direction for positioning the cylinder block gripped by the gripping portion of the gripping mechanism; A stamping device comprising a stamping mechanism for marking a character string arranged in the X direction with respect to the cylinder block after the pin is positioned by being inserted into the hole,
The gripping mechanism, X direction Cartesian the grip portion, it is possible to position and displace the orientation in the Y and Z directions,
The stamping mechanism includes a stamping head having a stamp row in which stamps are arranged, a displacement mechanism for displacing the stamp, and a rotation urging mechanism for rotating the stamping head. and it is and located fixed,
A movable plate installed on the positioning plate so as to be movable back and forth in the X direction; and a switch for detecting that the movable plate has moved backward,
After the gripping part gripping the cylinder block is brought close to the positioning plate, the gripping part is moved in the X direction to bring the cylinder block into contact with the positioning plate, and the gripping part is moved in the Y direction. Or by moving the cylinder block in sliding contact with the positioning plate until the pin is fitted in the hole of the cylinder block by moving in the Z direction,
When the switch detects that the movable plate pressed by the cylinder block is retracted when the pin is fitted in the hole, the cylinder block is determined to be positioned with respect to the YZ plane;
By displacing the grip portion in the X direction, the cylinder block positioned in the YZ plane is moved from the positioning plate in the X direction so as to be close to the stamping mechanism, and then the marking is performed by the displacement mechanism. By imprinting letters on the cylinder block by displacing the child,
While the gripping part is displaced in the X direction, the next portion to be stamped in the cylinder block is opposed to the stamping mechanism, while the stamp having the characters to be stamped next is selected. After that, the marking device is characterized in that the character is again stamped on the cylinder block by displacing the stamp with the displacement mechanism.   2. The stamping apparatus according to claim 1, wherein the stamp row has a first stamp row and a second stamp row arranged concentrically with each other.   3. The apparatus according to claim 1, wherein the stamping mechanism has a detecting unit that detects that the stamping hammer that has finished marking has moved backward to a position where it does not interfere with the stamping head. Stamping device.   4. The stamping apparatus according to claim 1, wherein the displacement mechanism includes a stop mechanism that stops the stamping hammer that has finished marking in the middle of retraction. 5. 5. The apparatus according to claim 1, further comprising: loading means for loading the cylinder block to a position where the gripping mechanism grips; and unloading means for unloading the cylinder block that has been marked. A stamping device characterized by comprising: 6. The apparatus according to claim 1, further comprising monitoring means for monitoring a marking surface of the cylinder block . Device according to any one of claims 1-6, character information to be marked on the cylinder block as described in the information sheet stuck on the jig for supporting the cylinder block, to the cylinder block An engraving apparatus further comprising information reading means for reading after a character is imprinted.

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