JP5439767B2 - Electrode structure of cylinder block surface treatment equipment - Google Patents

Description

The present invention seals one end of the cylinder inner peripheral surface in the cylinder of the cylinder block and circulates the processing liquid, and the cylinder inner peripheral surface is pre-plated or plated with an electrode disposed opposite to the cylinder inner peripheral surface. The present invention relates to an electrode structure of a cylinder block surface treatment apparatus .

Conventionally, one end side (crankcase surface side end portion) of the cylinder inner peripheral surface of the cylinder of the cylinder block is sealed to circulate the processing liquid, and the cylinder inner peripheral surface is formed by an electrode disposed opposite to the cylinder inner peripheral surface. A cylinder block surface treatment apparatus for performing plating pretreatment or plating treatment is disclosed. Of these, Patent Document 1 describes a balloon-shaped sealing member inserted into a cylinder from the crankcase surface side and sealing the crankcase surface side end portion of the cylinder inner peripheral surface by this sealing member. .

Further, in Patent Document 1, an electrode that also serves as a flow path component is inserted into and removed from a cylinder of the V-type cylinder block, and a holder that is also a flow path component is disposed inside the support block together with the electrode. Also configured to move. The support block is also a member that forms a flow path together with the electrode and the holder, and the flow path of the electrode, the holder, and the support block is formed in communication when the electrode is inserted into the cylinder.
JP-A-8-74095

  However, in the apparatus described in Patent Document 1, the sealing component for preventing leakage of the processing liquid flowing through the flow path comes into sliding contact with moving components such as an electrode and a holder, so that the sealing performance is lowered. There is a fear. In particular, in plating equipment that uses corrosive chemicals such as acids and alkalis, the deterioration of seal parts is promoted, and the seal performance of seal parts that come into sliding contact with moving members becomes severe. There is.

The object of the present invention has been made in consideration of the above-described circumstances, and even when the electrodes are inserted into and withdrawn from the cylinder of the cylinder block, the sealing performance around the electrodes forming the flow path can be ensured. The object is to provide an electrode structure of a cylinder block surface treatment apparatus .

The present invention seals one end side of the cylinder inner peripheral surface of the cylinder in the cylinder block, guides the processing liquid to the cylinder inner peripheral surface, and the action of the electrode disposed opposite to the cylinder inner peripheral surface A cylinder block surface treatment apparatus for pre-plating or plating a peripheral surface, the electrode, an electrode support part for supporting the electrode, and a flow path for the treatment liquid together with the electrode and the electrode support part. The flow path constituting block to be formed is integrated so that the electrode can be moved into and out of the cylinder.

According to the present invention, since the electrode, the electrode support portion, and the flow path constituting block are integrated and provided so as to be movable, they do not move relative to each other. For this reason, the sealing member interposed between these electrodes, the electrode support portion, and the flow path constituting block to prevent the leakage of the processing liquid does not slide on the moving member, so that the sealing property can be maintained. As a result, even when the electrode is inserted into and withdrawn from the cylinder of the cylinder block, the sealing performance around the electrode forming the flow path of the processing liquid can be secured, and the reliability can be improved.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

FIG. 1 is an overall front view showing a processing apparatus to which an embodiment of an electrode structure of a cylinder block surface processing apparatus according to the present invention is applied. FIG. 2 is a cross-sectional view showing the periphery of an electrode and an air joint in the processing apparatus of FIG.

  In the processing apparatus 10 shown in FIG. 1, a seal jig 13 (FIG. 2) seals an end on the crankcase surface 5 side that is one end of the cylinder inner peripheral surface 3 of the cylinder block 1 in the engine. A processing solution (plating pretreatment solution or plating solution) is introduced into the cylinder, and the cylinder inner peripheral surface 3 is processed at a high speed (plating pretreatment or plating treatment) by the action of the electrode 12 disposed opposite to the cylinder inner peripheral surface 3. The apparatus main body 11, the electrode 12, the sealing jig 13, the work holding jig 14, the air joint 15, the clamping cylinder 16, and the electrode cylinder 17 are configured.

  In the present embodiment, the cylinder block 1 is a V-type cylinder block of a V-type multi-cylinder engine, and the cylinder inner surface 3 of a plurality of cylinders 2 formed with a predetermined angle difference in the cylinder block 1 A pre-plating process or a plating process is simultaneously performed by the processing apparatus 10. Accordingly, the processing apparatus 10 functions as a cylinder block plating pre-processing apparatus such as an electrolytic etching processing apparatus for the cylinder block 1, an anodizing processing apparatus, or a cylinder block plating processing apparatus.

  As shown in FIGS. 4 and 5, the cylinder block 1 includes a crankshaft (both shown in the drawing) between the cylinder inner surface 3 and the crankcase surface 5 side end portion of the plurality of cylinders 2. A crank journal 6 is formed to support the shaft (not shown). In the cylinder block 1 in which the arrangement pitch of the plurality of cylinders 2 is set to be short, the crank journal 6 is formed so as to protrude inward of the cylinder 2 in the vicinity of the end of the cylinder inner peripheral surface 3 on the crankcase surface 5 side. It is an obstacle in the vicinity of the end portion on the crankcase surface 5 side of the inner peripheral surface 3.

  As shown in FIG. 1, the apparatus main body 11 of the processing apparatus 10 is installed and fixed on a gantry 18, and includes a workpiece mounting table 19 on which the cylinder block 1 is mounted. The cylinder block 1 is placed on the work placement table 19 with the head surface 4 facing downward. The cylinder block 1 is conveyed to the workpiece mounting table 19 in the horizontal direction using a conveying conveyor (not shown) or the like, and positioned and mounted using positioning pins or the like.

  In the apparatus main body 11, a workpiece holding jig 14 is installed above the workpiece mounting table 19 so as to be moved up and down by a clamping cylinder 16. The work holding jig 14 is provided with a clamp (not shown). The work holding jig 14 abuts against the crankcase surface 5 of the cylinder block 1 placed on the work placing table 19 at the lowered position. At this time, the clamp of the workpiece holding jig 14 grips the crankcase surface 5 side of the cylinder block 1, and the cylinder block 1 is held between the workpiece mounting table 19 and the workpiece holding jig 14.

  At this time, the air joint 15 is inserted into the cylinder block 1 from the crankcase surface 5 side of the cylinder block 1 as shown by a one-dot chain line in FIG. 1, and is installed at the upper end of the electrode 12 as shown in FIG. It faces the sealing jig 13 and waits at a standby position separated from the sealing jig 13.

  The electrode 12 shown in FIG. 1 is supported by an electrode support portion 20, and this electrode support portion 20 is attached to an electrode cylinder 17 installed in the apparatus main body 11. By this forward / backward movement of the electrode cylinder 17, the electrode 12 is inserted into the cylinder 2 of the cylinder block 1 from the end of the cylinder inner peripheral surface 3 on the head surface 4 side, and the electrode 12 is moved from the cylinder 2 of the cylinder block 1. To leave. The left electrode 12 in FIG. 1 shows an insertion state into the cylinder 2, and the right electrode 12 in FIG. 1 shows a withdrawal state from the cylinder 2. When the electrode 12 is inserted into the cylinder 2 of the cylinder block 1, the seal ring 21 (FIG. 2) such as a silicone rubber sheet installed in the flow path constituting block 66 comes into contact with the head surface 4 of the cylinder block 1, The head surface 4 side end (other end side) of the cylinder inner peripheral surface 3 is sealed.

That is, as shown in FIG. 3, the flow path configuration block 66 that forms the flow path 67 for the treatment liquid between the electrode 12, the electrode support section 20 that supports the electrode 12, and the electrode support section 20. Are integrated so that the electrode 12 can be moved by the electrode cylinder 17 so as to be inserted into and retracted from the cylinder 2 of the cylinder block 1. Specifically, the lower end of the electrode 12 is screwed to the upper end of the electrode support 20, and the lower end of the electrode support 20 is fixed to the piston rod 71 of the electrode cylinder 17 via the bracket 72. . Then, the lower portion of the flow path constituting block 66 is inserted into the lower end portion of the electrode support portion 20, and is fixed using screws or the like. Thus, the electrode 12, the electrode support portion 20, and the flow path constituting block 66 are integrated, and the electrode 12 can be inserted into and removed from the cylinder 2 of the cylinder block 1 by the advance / retreat operation of the electrode cylinder 17.

  At this time, the movement line 73 in the direction of the electrode 12 toward the cylinder 2 and the movement line 74 of the piston rod 71 of the electrode cylinder 17 (that is, the axis of the electrode cylinder 17) are offset in parallel via the bracket 72. It is arranged at the position.

  Further, the electrode 12 and the electrode support part 20 are formed with an in-electrode flow path 12A and an electrode support part flow path 20A for the processing liquid, respectively, and the in-electrode flow path 12A and the electrode support part flow path 20A communicate with each other. Formed. 12 A of in-electrode flow paths are the cylinder inner peripheral surface 3 and the outer peripheral part of the electrode 12 through the slit 26 (FIG. 2) between the sealing jig 13 installed in the upper end of the electrode 12 and the electrode 12 so that it may mention later. Are communicated with a space 27 formed between them. In addition, a flow path 67 formed between the outer peripheral surface of the electrode support portion 20 and the inner peripheral surface of the flow path constituting block 66 is also electrically connected to the space 27.

  As shown in FIG. 3, a joint block 75 in which a flow path 75 </ b> A is formed is attached to the lower end portion of the electrode support portion 20, and a treatment liquid pipe 23 </ b> A for treatment liquid ( Are connected by screwing. The processing liquid pipe 23 </ b> A communicates with the electrode support inner flow path 20 </ b> A through the flow path 75 </ b> A of the joint block 75. Further, a joint block 77 in which a flow path 77A is formed is attached to the flow path constituting block 66, and a processing liquid pipe 23B (described later) for processing liquid is screwed to the joint block 77 via an adapter 78. Connected. The processing liquid pipe 23 </ b> B communicates with the flow path 67 of the flow path configuration block 66 through the flow path 77 </ b> A of the joint block 77.

  In order to prevent leakage of the processing liquid flowing through the above-described intra-electrode flow path 12A, electrode support internal flow path 20A, flow paths 67, 75A, and 77A, a seal component 79 is provided between the electrode 12 and the electrode support section 20. The seal part 80 is provided between the electrode support part 20 and the joint block 75, the seal part 81 is provided between the electrode support part 20 and the flow path constituting block 66, and between the flow path constituting block 66 and the joint block 77. Seal parts 82 are respectively interposed. Since these seal parts 79, 80, 81, and 82 are integrated with the electrode 12, the electrode support part 20, the flow path constituting block 66, and the joint blocks 75 and 77, they do not slide on the moving member. Good sealing performance is maintained.

  Further, the sealing jig 13 is installed at the upper end of the electrode 12, and the sealing ring 21 is installed at the upper end of the flow path constituting block 66. When the electrode 12 is inserted into the cylinder 2 of the cylinder block 1, the sealing jig 13 seals the end of the cylinder inner peripheral surface 3 on the crankcase surface 5 side, as will be described later, and the seal ring 21 As described above, the end of the cylinder inner peripheral surface 3 on the head surface 4 side is sealed. The seal jig 13 and the seal ring 21 are installed with their positions fixed by the integrated electrode 12, electrode support portion 20, and flow path constituting block 66.

  As shown in FIGS. 1 to 3, a sealing jig 13 is installed at the upper end of the electrode 12, and an air joint 15 as a drive mechanism for operating a sealing member 33 of the sealing jig 13 is attached to the work holding jig 14. Separated from the sealing jig 13, it is arranged above the sealing jig 13 and the electrode 12.

  The sealing jig 13 is inserted into the cylinder together with the electrode 12 from the end of the cylinder inner peripheral surface 3 on the head surface 4 side by the advancing operation of the electrode cylinder 17. Therefore, it is not necessary to insert the sealing jig 13 while avoiding the crank journal 6 shown in FIGS. For this reason, the sealing member 33 of the sealing jig 13 has an outer diameter dimension set to a value close to the inner diameter dimension of the cylinder inner circumferential surface 3, that is, a value slightly smaller than the inner diameter dimension of the cylinder inner circumferential surface 3. The amount of expansion / contraction is reduced.

  The air joint 15 supplies air as a working fluid for operating the seal member 33 of the seal jig 13 to the seal member 33. As shown in FIG. 5, the air joint 15 is installed in an air joint cylinder 29 fixed to the work holding jig 14, and the air joint cylinder 29 moves forward and backward as shown in FIGS. It is provided to be movable between the advanced position shown in FIG. 1 and the two-point difference line in FIG. 1 and the standby position shown in FIG. Therefore, the air joint 15 is moved from the standby position shown in FIG. 4 toward the cylinder 2 by the advancing operation of the air joint cylinder 29, and is inserted into the cylinder 2 as shown in FIGS. It is provided so as to be connectable to the sealing jig 13.

  That is, the sealing jig 13 and the air joint 15 are brought into contact with the sealing jig 13 by the advancing operation of the air joint cylinder 29 after the electrode 12 is inserted into the cylinder 2 of the cylinder block 1. As will be described in detail later, air (air) as a fluid is supplied from the main air coupling 22 of the air joint 15 to the sealing member 33 of the sealing jig 13. As a result, the seal member 33 expands only in the radial direction and comes into contact with the cylinder inner peripheral surface 3 of the cylinder block 1, and the crank case surface 5 side end (one end side) of the cylinder inner peripheral surface 3 is sealed. After the supply of air to the seal member 33 is stopped and the seal member 33 contracts, the air joint 15 is returned to the standby position by the retracting operation of the air joint cylinder 29.

  Here, as shown in FIGS. 4 and 5, the main air joint 22 and a later-described sub air joint 58 installed in the air joint 15 are provided at positions avoiding the crank journal 6 of the cylinder block 1. Interference with is prevented. Reference numeral 69 in FIG. 5 is a temperature sensor for measuring the temperature of the cylinder block 1 being processed, and is installed in the work holding jig 14 adjacent to the air joint cylinder 29.

  A processing liquid pipe 23A is connected to the electrode support portion 20 shown in FIG. 1, and a liquid feed pump 24A (FIG. 2) is disposed in the processing liquid pipe 23A. The liquid feed pump 24A is configured to treat the processing liquid (plating liquid) stored in the chemical liquid tank 25 in a state where the end of the cylinder inner peripheral surface 3 of the cylinder block 1 is sealed by the seal member 33. It is guided to the in-electrode channel 12A of the electrode 12 through the treatment liquid pipe 23A and the in-electrode channel 20A of the electrode support 20. The processing liquid guided to the in-electrode flow path 12A flows upward in the in-electrode flow path 12A as shown by the arrow in FIG. 2, and between the seal lower plate 34 (described later) of the sealing jig 13 and the electrode 12. Through the slit 26, flows downward in a space 27 defined by the outer peripheral surface of the electrode 12 and the cylinder inner peripheral surface 3 of the cylinder block 1, and is a flow path constituted by the electrode support portion 20 and the flow path constituting block 66. It returns to the chemical | medical solution tank 25 through 67, and circulates.

  Further, the processing liquid pipe 23B is connected to the flow path constituting block 66, and the liquid feeding pump 24B is disposed in the processing liquid pipe 23B. This liquid feed pump 24B is a treatment liquid (pre-plating treatment solution) stored in a chemical solution tank 25 in a state where the end of the cylinder inner peripheral surface 3 of the cylinder block 1 is sealed by the sealing jig 13. ) Is sequentially introduced into the space 27 between the electrode 12 and the cylinder inner peripheral surface 3 through the treatment liquid pipe 23B, the flow path 67 constituted by the electrode support portion 20 and the flow path configuration block 66, and the space 27 is moved upward. To flow. The processing liquid that has flowed in the space 27 passes through the slit 26 between the sealing jig 13 and the electrode 12 and sequentially reaches the in-electrode channel 12A and the electrode support unit channel 20A. It flows downward in the flow path 20A within the support section and returns to the chemical tank 25 to circulate. The processing liquid pipes 23A and 23B are constituted by flexible hoses that can be bent.

  As shown in FIGS. 1 and 2, a bendable lead wire 28 is connected to the electrode support portion 20, and the lead wire 28 is connected to a power supply device 30. The power supply device 30 supplies electricity to the electrode 12 through the lead wire 28 and the electrode support portion 20 in a state where the space 27 is filled with the processing liquid and the processing liquid flows. This power supply is performed so that the electrode 12 becomes a negative pole and the cylinder block 1 becomes a positive pole during the pre-plating process, whereby the cylinder inner peripheral surface 3 of the cylinder block 1 is pre-plated. During the plating process, the electrode 12 is supplied with power to the positive electrode and the cylinder block 1 is supplied with power to the negative electrode, the inner peripheral surface 3 of the cylinder is plated, and a plating film is formed on the inner peripheral surface 3 of the cylinder. Here, the pre-plating process and the plating process are separately performed by different processing apparatuses 10 of the same type by changing the processing solution and the energization conditions.

  Although one air joint 15 is shown in FIG. 1, a number corresponding to the number of electrodes 12 (that is, the number of cylinders 2 in the cylinder block 1) is installed in the work holding jig 14. Further, reference numeral 31 in FIG. 1 indicates that the cylinder inner peripheral surface 3 of the cylinder block 1 has been subjected to pre-plating treatment or plating treatment, and has advanced after the electrode 12 has been retracted from the cylinder block 1. 4 is a cleaning shutter that is used when the cleaning liquid is sprayed onto 4 for cleaning.

  Next, the configuration of the sealing jig 13 and the air joint 15 will be described in detail with reference to FIGS.

  The seal jig 13 comes into contact with the crankcase side end portion of the cylinder inner peripheral surface 3 and guides the cylinder inner peripheral surface 3 when guiding the processing liquid into the space 27 including the cylinder inner peripheral surface 3 of the cylinder block 1. The seal member 33 is configured to include a seal member 33, a seal lower plate 34, and a seal base 35.

  As shown in FIG. 6, the seal member 33 is made of a stretchable material (for example, an elastic member such as rubber) and is formed in a floating ring shape. An inner peripheral side portion of the seal member 33 is opened to provide an opening 49, and engaging protrusions 36 are formed on both sides in the vicinity of the opening 49. The outer peripheral portion 33 </ b> A of the seal member 33 can contact the cylinder inner peripheral surface 3 of the cylinder block 1. The outer diameter of the outer peripheral portion 33A of the seal member 33 is set to a value slightly smaller than the inner diameter of the cylinder inner peripheral surface 3 in a state where air is not supplied to the inside.

  As shown in FIG. 6, the seal lower plate 34 is formed by integrally forming a bulging portion 37 at the center of the disc portion 32. A ring member 39 having a circumferential groove 38 is disposed on the outer periphery of the bulging portion 37. Further, main air flow paths 40C and 40D are formed in communication with the bulging portion 37. Of these, a plurality of, for example, three main air passages 40 </ b> D are formed at equal intervals in the circumferential direction of the lower seal plate 34. The main air flow path 40D communicates with the circumferential groove 38 of the ring member 39, and a main air flow path 40E formed to communicate with the circumferential groove 38 at a plurality of circumferential positions (for example, three positions) of the ring member 39. Communicate.

  Further, an engagement groove 41 is formed in a ring shape at the boundary portion with the bulging portion 37 in the disc portion 32 of the lower seal plate 34. The engaging protrusion 36 of the seal member 33 is engaged with the engaging groove 41. Further, the disk portion 32 and the bulging portion 37 are provided with a female screw portion 42 for fastening and a bolt screw hole 44 for inserting a bolt 43. The seal lower plate 34 configured as described above is configured so that the opening 49 of the seal member 33 is fitted to the ring member 39 and the engagement protrusion 36 of the seal member 33 is engaged with the engagement groove 41. The part 32 supports one side surface of the seal member 33 (the lower side surface 33C of FIG. 6).

  As shown in FIG. 6, the seal base 35 is configured by integrally forming a bulging portion 46 at the center of the disc portion 45, and a seat seat 47 and a main air flow path 40 </ b> B are formed in the bulging portion 46. A seal sheet 48 is attached to the seat seat 47, and a main air flow path 40A communicating with the main air flow path 40B is formed in the seal sheet 48. The main air flow path 40B is provided so as to communicate with the main air flow path 40C of the lower seal plate 34.

  Further, the disc portion 45 is formed with a concave portion 50 in which the bulging portion 37 of the lower seal plate 34 can be fitted at a position opposite to the seat 47, and an engagement groove 51 is formed in a ring shape outside the concave portion 50. Formed. The engagement protrusion 36 of the seal member 33 is engaged with the engagement groove 51. Bolt screw holes 52 for screwing bolts 43 are formed in the disc portion 45 and the bulging portion 46.

  The bulging portion 37 of the seal lower plate 34 is fitted into the recess 50 of the seal base 35, the opening 49 of the seal member 33 is fitted to the ring member 39 of the seal lower plate 34, and the engagement protrusion 36 of the seal member 33. Are engaged with the engagement groove 41 of the seal lower plate 34 and the engagement groove 51 of the seal base 35, and the bolt 43 is screwed into the bolt screw hole 44 of the seal lower plate 34 and the bolt screw hole 52 of the seal base 35. Then, the seal member 33, the seal lower plate 34, and the seal base 35 are integrated to form the seal jig 13.

  In this state, the lower seal plate 34 and the lower seal base 35 are arranged to face each other, and the disc portion 32 of the lower seal plate 34 connects one side surface (the lower side surface 33C of FIG. 6) of the seal member 33 to the seal base 35. The disk portions 45 respectively support the other one side surface of the seal member 33 (the upper side surface 33B of FIG. 6). Furthermore, the main air flow paths 40 </ b> A, 40 </ b> B, 40 </ b> C, 40 </ b> D, and 40 </ b> E communicating with each other communicate with the inside of the seal member 33 in a state where the seal member 33, the seal lower plate 34, and the seal base 35 are integrated.

  As shown in FIG. 2, the sealing jig 13 is attached to the upper end of the electrode 12 via a sealing jig attachment plate 53 as an insulating member. The sealing jig mounting plate 53 is formed in a substantially cross shape with four directions cut out, and a fastening male screw portion 54 is formed at the center. The tip of the substantially cross-shaped sealing jig mounting plate 53 is fixed to the electrode 12 with a bolt 55. Then, the male screw portion 54 of the seal jig mounting plate 53 is screwed into the female screw portion 42 of the seal lower plate 34 of the seal jig 13, and the seal member 33, the seal lower plate 34, and the seal base 35 are integrated. The jig 13 is attached to the seal jig attachment plate 53.

  The seal jig mounting plate 53 is made of non-conductive resin or the like, and insulates the lower seal plate 34 and the seal base 35 made of conductive metal from the electrode 12. Further, the processing liquid flows toward the slit 26 as shown by an arrow in FIG. 2 through the cut-out portion of the substantially cross-shaped sealing jig mounting plate 53, for example. An insulating collar 68 is attached to the lower surface on the outer peripheral side of the sealing jig mounting plate 53 in order to further improve the insulation.

  The air joint 15 shown in FIGS. 1 and 2 includes the main air joint 22 as described above, and a main air supply channel 56 is formed. The main air coupling 22 is connected to an air supply valve and a compressor (not shown) via a main air supply pipe 57. The air joint 15 is inserted from the standby position shown in FIG. 4 toward the cylinder 2 by the advancing operation of the air joint cylinder 29 after the electrode 12 is inserted into the cylinder 2 of the cylinder block 1. It abuts on the sealing sheet 48 of the sealing jig 13 attached to the sealing jig 13 and is coupled to the sealing jig 13. In this coupled state, the main air supply channel 56 of the air joint 15 communicates with the main air channel 40A of the seal sheet 48 of the sealing jig 13. Air is supplied from the main air supply flow path 56 to the main air flow path 40 </ b> A, but air leakage at this time is prevented by the seal sheet 48.

  The seal sheet 48 has a function of absorbing an impact when the air joint 15 comes into contact, in addition to a function of ensuring airtightness to prevent air leakage. For this reason, this seal sheet 48 is preferably composed of an elastic member such as silicon rubber or Teflon (registered trademark) rubber. The seal sheet 48 may be provided at the tip of the air joint 15 instead of being attached to the seal base 35 of the seal jig 13, or between the seal base 35 of the seal jig 13 and the tip of the air joint 15. It may be provided in both.

  The air supplied from the main air supply channel 56 to the main air channel 40A is introduced into the seal member 33 through the main air channels 40B, 40C, 40D, and 40E as shown in FIG. The seal member 33 is expanded only in the radial direction as shown in FIG. 6A because the upper side surface 33B is supported by the seal base 35 and the lower side surface 33C is supported by the lower seal plate 34 to restrict expansion. The outer peripheral portion 33A of the seal member 33 comes into contact with the cylinder inner peripheral surface 3 of the cylinder block 1 and seals the end portion of the cylinder inner peripheral surface 3 on the crankcase surface 5 side. Thereby, the plating pretreatment liquid or the plating solution is prevented from leaking from the space 27 (FIG. 2) defined by the cylinder inner peripheral surface 3 and the outer peripheral surface of the electrode 12 to the crankcase surface 5 side.

  When the supply of air from the main air coupling 22 into the seal member 33 is interrupted, as shown in FIG. 6B, the seal member 33 contracts in the radial direction, and its outer peripheral portion 33A is the cylinder inner peripheral surface. Get away from 3. Thereafter, the air joint 15 is separated from the seal sheet 48 of the sealing jig 13 by the retracting operation of the air joint cylinder 29 and returned to the standby position (FIG. 4).

  Confirmation means for confirming expansion and contraction of the seal member 33 is provided in the seal jig 13 and the air joint 15 as shown in FIG. The confirmation means includes a sub air joint 58 and a sub air supply channel 59 on the air joint 15 side, a sub air channel 60 on the sealing jig 13 side, an air pressure sensor 61 and a control circuit 62.

  A plurality of, for example, three sub air joints 58 are arranged in the air joint 15. A plurality of, for example, three sub air supply passages 59 are formed in the air joint 15 corresponding to the sub air joint 58, and each is provided in communication with the sub air joint 58.

  The sub air channel 60 is formed in the seal base 35 of the sealing jig 13 as shown in FIG. A plurality of concentric ring grooves 63 (for example, three) are formed on the top surface of the bulging portion 46 in the seal base 35 in correspondence with the number of sub air supply passages 59, and each of the sub air is provided with each sub air. The supply channel 59 (FIG. 2) can be communicated. Further, a plurality of (for example, three) sub air passages 60 are radially formed at equal intervals in the seal base 35 corresponding to the number of the ring grooves 63. Each sub air flow path 60 is provided in communication with each ring groove 63. In each of the sub air flow paths 60, an outlet 64 is formed at the outer peripheral end of the seal base 35. As shown in FIG. 6, the air outlet 64 is provided at a position that is closed by the seal member 33 when the seal member 33 is expanded and opened when the seal member 33 contracts.

  Air as fluid introduced from the sub air joint 58 provided in the air joint 15 shown in FIG. 2 passes through the sub air supply flow path 59, and passes through the ring groove 63 and the sub air flow path 60 of the sealing jig 13 (FIG. 6). After that, it is provided so as to be able to blow out from the blower outlet 64. As shown in FIG. 6B, the air blowing from the air outlet 64 is performed when the air outlet 64 is opened without being closed by the seal member 33 when the seal member 33 is contracted. At this time, the air pressure of the sub air flow path 60, the sub air supply flow path 59, and the sub air joint 58 becomes low. On the other hand, when the seal member 33 is expanded, as shown in FIG. 6A, the air outlet 64 is closed by the seal member 33 so that air is not blown out from the air outlet 64. The air pressure in the passage 59 and the sub air joint 58 rises.

The air pressure sensor 61 shown in FIG. 2 is disposed in, for example, a plurality of, for example, three sub air supply pipes 65 that guide air to the plurality of sub air joints 58, and detects the air pressure in the sub air flow path 60 described above. . The expansion and contraction of the seal member 33 of the seal jig 13 can be confirmed by the detected value of the air pressure. That is, the seal member 33 expands to contact the cylinder inner peripheral surface 3 of the cylinder block 1 and the cylinder inner peripheral surface 3 is sealed in a liquid-tight manner, or the seal member 33 contracts, It is possible to check whether the cylinder inner peripheral surface 3 is not sealed without contacting the cylinder inner peripheral surface 3 of the cylinder block 1.

  Confirmation of the seal of the cylinder inner peripheral surface 3 of the cylinder block 1 due to the expansion and contraction of the seal member 33 is performed at a plurality of equal intervals in the circumferential direction of the seal base 35 (that is, the seal member 33). Since three are formed at equal intervals of 120 degrees in the circumferential direction of 33, the entire circumference of the seal member 33 is formed. As a result, deterioration, cracks, and breakage occur in a part of the circumferential direction of the seal member 33, and the seal member 33 is normally expanded except for the portion. Even when the expansion is insufficient and the cylinder block 1 is not in contact with the cylinder inner circumferential surface 3, the circumferential expansion and contraction of the seal member 33 is confirmed, and the cylinder inner circumferential surface 3 is sealed. Can be confirmed.

  The control circuit 62 shown in FIG. 2 takes in the detection value from the air pressure sensor 61 and controls the driving of the liquid feeding pumps 24A and 24B and the power supply device 30. That is, when the detection value from the air pressure sensor 61 is higher than a predetermined value, the control circuit 62 expands the seal member 33 of the seal jig 13 and contacts the cylinder inner peripheral surface 3 of the cylinder block 1. It is determined that the seal on the crankcase surface 5 side on the cylinder inner peripheral surface 3 is satisfactorily made. At this time, the control circuit 62 activates the liquid feed pump 24A or 24B to supply the processing liquid to the space 27 defined by the cylinder inner peripheral surface 3 and the outer peripheral surface of the electrode 12, and then the power supply device 30 is turned on. The electrode 12 is driven to supply power, and the cylinder inner peripheral surface 3 is subjected to plating pretreatment (electrolytic etching treatment, anodizing treatment) or plating treatment.

  When the detected value from the air pressure sensor 61 is equal to or smaller than a predetermined value, the control circuit 62 does not expand or contract properly and contacts the cylinder inner peripheral surface 3. Therefore, it is determined that the sealing of the cylinder inner peripheral surface 3 is incomplete, and the liquid feeding pumps 24A and 24B and the power supply device 30 are not driven, or these driving is stopped during the driving.

  With the configuration as described above, the following effects (1) to (5) are achieved according to the present embodiment.

(1) The electrode 12, the electrode support part 20, the flow path constituting block 66, the joint block 75, the adapter 76, the treatment liquid pipe 23A, the joint block 77, the adapter 78, and the treatment liquid pipe 23B are integrated, and the electrode cylinder 17 Since the electrodes 12 are configured to be movable so as to be inserted into and retracted from the cylinder 2 of the cylinder block 1 by the advance / retreat operation, they do not move with respect to each other. Therefore, a seal part 79 between the electrode 12 and the electrode support part 20, a seal part 80 between the electrode support part 20 and the joint block 75, and a seal part between the electrode support part 20 and the flow path constituting block 66 81, since the seal component 82 between the flow path constituting block 66 and the joint block 77 does not slide in contact with any moving member, it is possible to maintain a good sealing performance. As a result, even when the electrode 12 is inserted into and withdrawn from the cylinder 2 of the cylinder block 1, the in-electrode channel 12 </ b> A, the electrode support-inside channel 20 </ b> A, the channel 75 </ b> A, The sealing properties of the processing liquid pipe 23A, the flow paths 67 and 77A, and the processing liquid pipe 23B can be satisfactorily ensured, and the reliability can be improved.

(2) The electrode 12, the electrode support section 20, the flow path constituting block 66, the joint block 75, the adapter 76, the processing pipe 23A, the joint block 77, the adapter 78, and the processing liquid pipe 23B are integrated, and the electrode cylinder 17 advances and retreats. Since the electrode 12 is configured to be movable so as to be inserted into and withdrawn from the cylinder 2 of the cylinder block 1 by the operation, the electrode 12 does not move relative to the electrode support portion 20, the flow path constituting block 66, or the like. . For this reason, since the positional accuracy of the electrode 12 with respect to the cylinder inner peripheral surface 3 of the cylinder block 1 can be improved, the film thickness of the plating film formed on the cylinder inner peripheral surface 3 can be made uniform.

(3) The electrode 12, the electrode support portion 20, the flow path constituting block 66 and the like are integrated, and the electrode 12 is inserted into and removed from the cylinder 2 of the cylinder block 1 by the advance / retreat operation of the electrode cylinder 17. For this reason, when the cylinder block 1 is transported and installed, the electrode 12 is moved out of the cylinder 2 of the cylinder block 1 so that the cylinder block 1 is moved horizontally by a transport conveyor or the like, and the workpiece mounting table 19 of the processing apparatus 10 is moved. Can be transported and installed (set).

  (4) A sealing jig 13 that seals the crankcase surface 5 side end portion of the cylinder inner peripheral surface 3 of the cylinder block 1 is installed at the upper end of the electrode 12, and the head surface 4 side end portion of the cylinder inner peripheral surface 3 is sealed. The seal ring 21 is installed at the upper end of the flow path constituting block 66, and these electrodes 12 and the flow path constituting block 66 are integrated via the electrode support portion 20. For this reason, compared with the background art (patent document 1) which moves the seal member which seals the crankcase surface side end part in the cylinder inner peripheral surface separately, the seal position accuracy of both ends of the cylinder inner peripheral surface 3 is improved. be able to.

  (5) The axis of the electrode cylinder 17 (moving line 74 of the piston rod 71) that moves the electrode 12, the electrode supporting unit 20, the flow path constituting block 66 and the like integrally is moved with respect to the moving line 73 of the electrode 12. They are offset in parallel. For this reason, compared with the background art (patent document 1) which arrange | positions the electrode cylinder on the extension line | wire of the moving line of the electrode 12, the combination length of the electrode 12, the electrode support part 20, the flow path structure block 66, and the electrode cylinder 17 Therefore, the entire apparatus of the processing apparatus 10 can be reduced in size. In particular, when the electrode cylinder 17 is disposed above the electrode 12, the electrode support section 20, the flow path constituting block 66, etc., the inside of the electrode internal flow path 12A, the electrode support section internal flow path 20A, the flow path 67, etc. Since the treatment liquid and the cleaning liquid flowing through the electrode do not adhere to the electrode cylinder 17, the life of the electrode cylinder 17 can be extended.

  As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to this. For example, in the present embodiment, the case where the same type of different processing apparatus 10 separately performs the plating pretreatment and the plating process has been described. However, the same processing apparatus 10 sequentially executes the plating pretreatment and the plating process. However, in this case as well, the same effects as the effects (1) to (5) of the above embodiment can be obtained.

  In this embodiment, the case where the cylinder block 1 is a V-type cylinder block of a V-type multi-cylinder engine has been described. However, the present invention is also applied to a cylinder block of an in-line multi-cylinder engine or a single-cylinder engine. It is possible.

BRIEF DESCRIPTION OF THE DRAWINGS The whole front view which shows the processing apparatus with which one Embodiment in the electrode structure of the cylinder block surface processing apparatus which concerns on this invention was applied. Sectional drawing which shows the electrode and air joint periphery in the processing apparatus of FIG. Sectional drawing which shows the electrode of FIG. 1, and the surroundings of an electrode cylinder. Sectional drawing which shows the non-bonding state (standby state) of the air cylinder and sealing jig | tool of FIG. Sectional drawing which shows the coupling | bonding state of the air joint and sealing jig | tool of FIG. 2 with the cylinder for air joints. The sealing jig of FIG. 2 is shown, (A) is sectional drawing which shows the expansion state of a sealing member, (B) is sectional drawing which shows the contraction state of a sealing member.

Explanation of symbols

1 Cylinder block 2 Cylinder 3 Cylinder inner peripheral surface 4 Head surface (other end)
5 Crankcase surface (one end)
6 Crank Journal 10 Processing Device 12 Electrode 12A Electrode Flow Channel 13 Sealing Jig 17 Electrode Cylinder 20 Electrode Support Portion 20A Electrode Support Portion Flow Channel 21 Seal Ring (Seal Member)
66 Flow path configuration block 67 Flow path 73 Movement line 75, 77 Joint block 79, 80, 81, 82 Sealing parts

Claims (4)

Seal one end of the cylinder inner peripheral surface of the cylinder in the cylinder block, guide the treatment liquid to the cylinder inner peripheral surface, and plate the cylinder inner peripheral surface by the action of the electrode disposed opposite to the cylinder inner peripheral surface. A cylinder block surface treatment apparatus for pretreatment or plating treatment,
The electrode, an electrode support part that supports the electrode, and a flow path configuration block that forms a flow path for the processing liquid together with the electrode and the electrode support part are integrated, and the electrode is placed in the cylinder. An electrode structure of a cylinder block surface treatment apparatus, which is configured to be movable so as to be inserted into and withdrawn from a cylinder. A seal jig for sealing one end of the cylinder inner peripheral surface is installed at the tip of the electrode, and a seal member for sealing the other end of the cylinder inner peripheral surface is installed at the tip of the flow path constituting block, and the seal 2. The electrode structure for a cylinder block surface treatment apparatus according to claim 1, wherein the positions of the jig and the seal member are fixed. 2. The cylinder block according to claim 1, wherein the electrode cylinder for integrally moving the electrode, the electrode support portion, and the flow path constituting block is arranged to be offset in parallel to a movement line of the electrode. Electrode structure of surface treatment equipment. 2. The electrode structure of a cylinder block surface treatment apparatus according to claim 1, wherein the cylinder block is a cylinder block of a V-type multi-cylinder engine, an in-line multi-cylinder engine, or a single-cylinder engine.

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