JP4832205B2 - Continuous dipping processing equipment - Google Patents

Description

  The present invention relates to a novel continuous immersion treatment apparatus in which a series of operation (treatment) stations necessary for performing continuous immersion treatment on a metal material (workpiece) is integrally arranged around an endless moving device.

  In particular, the present invention relates to a continuous dipping treatment apparatus suitable for performing coating (surface treatment / lubricating layer forming treatment) of a metal material (workpiece) before or during cold working (forging, pressing, rolling, etc.).

  Here, a case where a chemical solution is immersed in a metal material for cold forging to form a lubricating layer will be mainly described as an example.

  Further, in this specification, “hot water wash” means a special case of “water wash”, that is, a case where “hot water” is used as “water”.

  Conventionally, in cold working, the formation of a lubricating layer on a metal material for cold forging in particular has been performed, for example, through a process as shown in FIG. 1 (see Paragraph 0042 Table 1 in Patent Document 1).

  However, in the above method, many (immersion) treatments are necessary, and water washing (rinsing step) is necessary to remove an excess chemical solution for each step, and conveyance means between each step is also necessary. It was.

  In order to solve the above problems, a drug (chemical solution) capable of forming a lubricating layer forming layer by chemical conversion treatment, immersion, and drying once or twice has recently been put on the market.

  And the lubricant layer formation process of the workpiece | work (metal) raw material using the said chemical | medical agent is generally performed by the following barrel systems (system similar to barrel plating).

  The work is put into a cylindrical work throwing basket (barrel). The barrel is immersed in a chemical tank filled with a chemical and rotated for a predetermined time. The barrel is lifted from the chemical bath and rotated in the same manner in a hot air dryer to be dried. After that, the work (product) is taken out from the work input basket.

  However, it has been found that the method for forming a lubricating layer as described above has the following problems.

    1) When the barrel is rotated, the workpieces interfere with each other, and a dent defect tends to occur on the workpiece.

    2) When the barrel is pulled up, a large amount of chemical solution is accompanied, and the chemical solution consumption tends to increase.

    3) A special conveying means was required between the dipping process (apparatus) and the drying process (apparatus).

    4) It was difficult to deal with a small variety of products with uneven workpiece shapes.

  Although not affecting the patentability of the present invention, Patent Document 2 describes a continuous processing apparatus having the following outline for the purpose of downsizing and saving paint (chemical solution) in the processing apparatus (summary). Etc.).

“A dip coating part placed below the conveyor belt stretched in the horizontal direction, a slide base installed so as to be movable in parallel with the traveling direction of the conveyor belt, and the slide base in parallel with the conveyor belt A horizontal driving means for moving, an elevating base for moving the paint tank, which is supported on the slide base and opened upward, in the vertical movement direction toward the conveyor belt, and installed above the ascending paint tank The liquid level sensor for revealing a predetermined position of the paint liquid level in the paint tank and the returning means for returning the slide base to the initial position. "
This device is a device that attaches a work (object to be coated) to an endless belt and continuously conveys it, and moves the paint tank synchronously when it comes to a predetermined position and applies the paint tank by moving it up and down, As in the present invention, the workpiece is not moved and intermittently moved (pitch moved), and the workpiece is dipped into the stationary immersion tank and applied at rest.
Japanese Patent Laid-Open No. 8-100196 JP 2000-279864 A

  In view of the above, the present inventor aims to provide a continuous immersion treatment apparatus having a novel configuration that can reduce the consumption of paint (chemical solution) such as a lubricant and that can be easily downsized ( As a problem, a continuous dipping treatment apparatus having the following configuration was previously proposed (Japanese Patent Application No. 2005-19822: unpublished at the time of filing).

“A continuous immersion treatment device for continuously applying immersion treatment to a workpiece,
An endless work moving means for circulating and moving the work is provided, and a position around the work moving means is set as a work loading / unloading position, and the work loading / unloading means is immersed in the order of the work moving direction across the work loading / unloading position. Means and drying means are arranged,
The work moving means includes an endless drive member and a work holding member attached to the endless drive member at a predetermined pitch so as to be movable up and down.
The immersion means includes an immersion tank and an elevating member for immersion that is disposed above the immersion tank and raises and lowers the work holding member. "
With this configuration, work holding members are mounted around the endless work moving means so as to move up and down at a predetermined pitch, so that even parts (stations) that need to be processed by setting off a work such as an immersion station can be transported. Processing is possible by placing an immersion bath or the like below the surface. That is, conveyance and processing can be performed at the same plane position, and the entire apparatus can be easily downsized and integrated.

  In the above-described configuration, the washing means is further provided on the front side of the dipping means in the workpiece movement direction, and the washing means is provided with a washing tank and a flushing elevating member that is disposed above the washing tank and raises and lowers the workpiece holding member. The washing tank may be configured to have a dipping tank and a temperature control means.

  In the above configuration, if the water washing tank is a hot water washing tank, the cleaning performance is improved, and further, the chemical solution (lubricating layer forming agent) in the immersion tank can be warmed, and the work adhesion of the immersion coating is improved. Furthermore, when the workpiece is warmed (stores heat), the drip removal property and drying property of the subsequent process are improved, which contributes to energy saving and productivity improvement.

  On the other hand, from the viewpoint of productivity improvement, recently, there has been an increasing demand for shortening (for example, less than 4 seconds) a work tact time (time required for lowering and raising the work).

  In this case, the hot water washing time of the workpiece is short, and the effect of washing with hot water (improvement of the work adhesion of the immersion coating, improvement of drip-off property / drying property in the subsequent process) can hardly be expected.

  Therefore, it is conceivable to raise the temperature of the hot water wash, but in a short time of hot water wash, it is difficult to raise the temperature to the deep part of the workpiece, and it is difficult to ensure the effect of the hot water wash, and from the viewpoint of energy saving Is also undesirable.

  In view of the above, when applying a lubricating layer to a forged metal material (work), etc., it is possible to shorten the tact time of the work, and to provide a continuous immersion treatment device that leads to improved productivity and energy saving And

  The continuous immersion treatment apparatus of the present invention solves the above problems by the following configuration.

A continuous immersion treatment device for continuously applying immersion treatment to a workpiece,
An endless work moving means for circulating the work is provided, and an arbitrary position around the work moving means is defined as a work carry-out position and a work carry-in position continuously in the movement direction of the work. Between them, water washing means (including hot water washing means), dipping means and drying means are arranged in the order of the workpiece movement direction,
The work moving means includes an endless drive member and a work holding member attached to the endless drive member at a predetermined pitch so as to be movable up and down, and is capable of pitch feeding at a predetermined cycle .
An annular guide rail is provided above the endless drive member so as to correspond to the outer periphery locus,
The work holding member is attached to the endless drive member so as to be integrally movable at a predetermined pitch, and is attached to a vertical movement rod fitted and supported by a guide block having a guide hole in the vertical direction, and attached to a lower end of the vertical movement rod. A workpiece holding jig, and a sliding member and an engaging hook that slide on the guide rail at an upper end portion of the vertical movement rod, the workpiece holding member can be circulated, and
The washing means is
A washing tank, and a pair of elevating members disposed above the washing tank,
One of the pair of elevating members is arranged at the washing start position, the other is arranged at the washing end position, a part of the guide rail at the washing start / end position is a foldable sliding member receiving portion, A retractable hook receiving portion that engages with an engaging hook and moves up and down integrally with the piston rod of the lifting cylinder of the lifting member is provided, and the engaging hook and the tiltable hook receiving portion are engaged / released to The moving rod can be moved up and down, and further, a sub guide rail is arranged between the washing start / end positions below the guide rail,
Between the washing start / end positions, the workpiece is held at a washing height and can be moved horizontally.
It is characterized by that.

  The continuous immersion treatment apparatus of the present invention can reduce the tact time (pitch feed time) by setting the workpiece unloading / carrying in different positions, and is further immersed (washed in water) over a plurality of stations without repeated ascent and descent. Move. For this reason, as compared with the case where the same plurality of stations are washed with water by the method of the prior application, the water washing is continued during intermediate descent, ascending and standby times. For this reason, the work heating effect by water washing improves remarkably compared with the method of a prior application, As a result, tact time (pitch feed time) can be shortened significantly.

  Moreover, in the said structure, it is desirable to arrange | position the upward jet nozzle which faces the lower surface of a workpiece | work at each workpiece | work stop position of the said water washing means and / or the said immersion means. When there is a dent on the lower surface of the workpiece, poor washing and chemical adhesion are unlikely to occur even if the tact time is short.

  In the case where a dropping device is disposed before the drying device, it is desirable that an air curtain generating device is included as the dropping device. By using alone or in combination with other drip-cutting means, the efficiency of drip-cutting is increased, and as a result, the tact time can be shortened.

  Hereinafter, a continuous immersion treatment (lubricating layer forming treatment) apparatus according to an embodiment of the present invention will be described with reference to the drawings.

  Here, the case where water washing is hot water washing will be described as an example, but the continuous immersion treatment apparatus of the present invention can also be applied to water washing.

  2 is a development plan flow diagram schematically showing the plant apparatus, FIG. 3 is an overall schematic front view of FIG. 2 (with the front hood removed), FIG. 4 is a schematic side sectional view of FIG. Fig. 6 is a schematic plan view (with the workpiece removed), Fig. 6 is a perspective view of the workpiece holding jig, and Figs. 7A and 7B are elevational views and plan views showing the air nozzle arrangement of the drip removal device. .

  In the apparatus of this embodiment, basically, a series of operation (processing) units necessary for performing continuous immersion processing on the workpiece W are integrally arranged around the endless workpiece moving device (work moving means) 12. It has been done.

  Here, the outer periphery locus by the endless work moving means is an ellipse, but it may be a perfect circle or a rectangle.

  The workpiece moving device 12 includes a drive chain device (endless drive member) 14 and a workpiece holding member 16 held on the drive chain device 14 at a predetermined pitch so as to be movable up and down.

  Specifically, in the drive chain device 14, a double chain 15 is stretched between double drive / driven sprockets 18, 20, and the drive sprocket 18 is driven by a synchronous motor 22. Here, the drive chain device 14 is supported on a first frame 26 having a first table 26a whose upper surface is a first oval shape at a predetermined height position. That is, the rotation shafts of the drive and driven sprockets 18 and 20 are supported by bearings at the center of the arcs of both ends of the ellipse in the first table 26a. A drive motor 22 is disposed above the drive sprocket 18 of the first table 26a.

  Here, the drive motor 22 is arranged on the upper surface of the second table 28a from the standpoint of maintenance. In addition, the drive motor 22 is a synchronous motor in the present embodiment. Since the synchronous motor has no speed reduction mechanism, the output shaft of the synchronous motor 22 and the input shaft of the speed reducer 23 are connected by the first coupling 24, and the output shaft of the speed reducer 23 is connected by the second coupling 24A. ing.

  Here, a reduction gear motor may be used instead of the synchronous motor. However, the synchronous motor enables smooth acceleration / deceleration, and the accuracy of the stop position is improved. In particular, it is suitable when high-speed operation with a short tact time (pitch feed time) is required and accuracy of the loading / unloading position is required. Although a servo motor may be used, numerical control is required and the cost is high.

  In the present embodiment, the second gantry 28 is formed on the first table 26a of the first gantry 26 via a pair of prisms 28b, and the upper surface of the first gantry 26 is an oval second table 28a slightly larger than the first table 26a. Has been. An annular main guide rail 30 is formed around the upper surface of the second table 28a.

  The work holding member 16 is attached to a drive chain device (endless drive member) 14 so as to be integrally movable at a predetermined pitch, and a vertical movement rod 34 fitted and supported by a guide block 32 having a guide hole 32a in the vertical direction; The work holding member 16 is provided with a work holding jig 36 attached to the lower end of the vertical movement rod 34 and a sliding member (roller) 44 that slides on the main guide rail 30 at the upper end of the vertical movement rod 34 so that the work holding member 16 can circulate. It is said that.

  In the example shown in the figure, the chain 15 is doubled and the vertical movement rods 34 are configured as one set in order to stably hold the workpiece. However, one or three or more may be used as appropriate. Yes, the rod cross section may be not only a regular shape such as a circle and a polygon, but also a flat cross section and other irregular cross sections.

  It is desirable that the driven sprocket 20 in the chain 15 is pushed in the tensioning direction of the chain 15 by a spring so that the tension of the chain can be automatically adjusted.

  The guide block 32 is attached to the outer surface of the chain via a bracket 40, and a support roller (sliding portion) 42 that slides on the outer peripheral surface of the first table 26a on the lower surface of the bracket 40 for stable running. Is installed.

  The work holding jig 36 is attached to the tip of the horizontal portion 38 a of the L-shaped suspension arm 38 attached to the lower end portion of the vertical movement rod 34. Here, the horizontal portion 38a has a triangular shape at the upper end cross section as shown in the figure, so that the chemical solution can be easily dropped. As shown in FIG. 6, the work holding jig 36 is a radiation receiver comprising a plurality of arms (four in the illustrated example) that extend radially so that droplets fall smoothly and have engagement portions formed at the tips. It consists of a part 36a and a conical set column part 36b that fits into a hole part of a perforated work and holds the work stably. At this time, the cross-section of the radiation receiving portion 36a, like the above-described horizontal portion 38a, is a circular cross-section as shown in the figure example in which the workpiece can be brought into point contact or the upper-end cross-sectional triangle shape as described above. Desirable from a viewpoint. At this time, the radiation receiving portion 36a and the set column portion 36b can be replaced with various sizes, respectively, and can be applied to the surface treatment of metal materials (work pieces) of various kinds and small quantities.

  An engagement roller (sliding member) 44 is attached to the upper end of the vertically moving rod 34 via a wheel holding member 43 having an L-shaped cross section. The engaging roller 44 is formed in a main guide rail 30 horizontally disposed on the outer peripheral surface of the second table 28a, and a sub guide formed below the main guide rail 30 over a hot water washing start position and a hot water washing end position. It travels on the rail 30A.

  Then, two positions that are continuous in the transport direction around the work moving device 12 are set such that the work carry-out robot 58 and the work carry-in robot 58A are moved to a work carry-out position (work carry-out station) S1 and a work carry-in position (work carry-in station) S2, respectively. It is said that.

  The work carry-in / carry-in stations S1 and S2 are set as different stations because at the same position, the stop time of the moving device is the total time of the carry-in / carry-out operation, so the speed is increased (pitch feed time: for example, 4 seconds or less) It becomes difficult to shorten the time.

  In the illustrated example, a workpiece carry-out position (station) S1 and a workpiece carry-in position (station) S2 are arranged on the drive sprocket 18 arrangement side with a longitudinal center line L1 interposed therebetween (see FIG. 2). The work unloading / carrying-in stations S1 and S2 do not have to be arranged with the longitudinal center line L1 interposed therebetween, and one side of the longitudinal center line or the front side or the rear side of the ellipse of the driving locus of the endless driving member. It may be an intermediate position on the side.

  An immersion device (immersion means, immersion station) 48 and a drying device (drying means, drying station) 50 are arranged in the order of the workpiece movement direction with the workpiece unloading / loading positions S1, S2 in between. Further, in the present embodiment, a hot water washing device (hot water washing means, a hot water washing station) 52 is provided on the front side of the immersion device 48 in the workpiece movement direction, and a drip removal device (dropping device, drop) on the rear side of the immersion device 48 in the workpiece movement direction. Cutting station) 54.

  Hereinafter, each of the above devices will be described in detail.

  The workpiece unloading / loading robots 58 and 58A arranged at the workpiece unloading / loading positions S1 and S2 each include a jig clamping device 46 that can rotate (turn) within a predetermined angle range. The jig clamp device 46 includes a clamp 46a that clamps and unclamps the protruding shaft 36c at the center of the lower surface side of the work holding jig 36, and a clamp cylinder 47 that opens and closes the clamp 46a. The clamp cylinder 47 is connected to the clamp 46a so that it is unclamped when the piston rod is raised and unclamped when the piston rod is lowered.

  The jig clamping device 46 of the workpiece unloading robot 58 receives the workpiece at the workpiece unloading position S1, rotates it to the right and delivers it at the start end position of the workpiece discharge conveyor 55, and then rotates counterclockwise to return to the workpiece unloading position S1 to receive the workpiece. Wait as much as possible.

  The jig clamp device 46 of the workpiece carry-in robot 58A receives the workpiece at the end of the workpiece carry-in conveyor 56, rotates the workpiece clockwise to deliver the workpiece at the workpiece loading position S2, and then rotates counterclockwise to terminate the workpiece carry-in conveyor 56. The position returns to the unloading position S1 and waits for the workpiece to be received.

  It should be noted that, of course, it is possible to use other methods such as forward / backward moving means without using the turning means for receiving and transferring the workpiece.

  The immersion device 48 includes an immersion tank 60 and an elevating member 62 for immersion that is disposed above the immersion tank 60 and raises and lowers the work holding member 16.

  In the example shown in the drawing, the elevating member 62 includes a roller receiving portion 68 that forms a part of the main guide rail 30 corresponding to the immersion position (one station) of the immersion bath 60 and can be moved up and down separately. It comprises drive means (elevating cylinder) 63 that drives the part 68 up and down. Specifically, the roller receiving portion 68 is integrally attached with a T-shaped connecting member 70 so as to be movable independently from the second table 28a. And the piston rod 63a of the raising / lowering cylinder 63 distribute | arranged to this connection member 70 on the 2nd table top 28a is couple | bonded. In the figure, reference numeral 74 denotes a support frame for the lifting cylinder.

  Further, in the present embodiment, the hot water washing device 52 disposed in front of the immersion bath 60 includes a hot water washing bath 64 having a length capable of dipping a work over a plurality of stations (three stations in the illustrated example), and a pair of lifts. The members 62A and 62B and the auxiliary guide rail 30A are provided.

  The elevating members 62A and 62B are disposed above the hot water washing start station and hot water washing end station of the hot water washing tub 64, and the sub guide rail 30A is located below the main guide rail 30 and between the elevating members 62A and 62B. Distributed to. Note that the upper guide rail 30B of the sub guide rail 30A is used as a through-through when not being washed with hot water. In addition, the hot water bath 64 is provided with a dipping bath 60 and a temperature control means 66.

  The elevating members 62A and 62B for hot water washing are provided with an elevating cylinder 63 like the elevating members for immersion. In this embodiment, since it is necessary to transfer (replace) the engagement roller 44 from the main guide rail 30 to the sub guide rail 30A, the hot water washing start position (work lowering position) and the hot water washing end position (work raising position). ) Has the following switching function (see the model diagram in FIG. 8). Since FIG. 8 is a model diagram, there is no dimensional and shape consistency with other diagrams.

  Here, on the ceiling side of the wheel holding member 43, an engagement hook 43 a for changing the engagement roller 44 toward the outside is formed.

  A roller receiving portion 68A (68B) constituting a part of the main guide rail 30 is a tiltable rail (falling traveling member receiving portion) that rotates between a horizontal receiving position and a receiving release position by the first auxiliary cylinder 69. It is said that. On the other hand, a hook receiving portion 45 to which the engagement hook 43a can be engaged is attached to the piston rod 63a of the elevating cylinder 63. The hook receiving part 45 is also a retractable hook hook receiving part that rotates between a horizontal receiving position and a receiving release position by a second auxiliary cylinder 69A attached to the piston rod 63a.

  The replacement at the hot water start position and the hot water end position by the above mechanism is as follows.

  First, when the workpiece comes to the hot water start position, first, the first auxiliary cylinder 69 is operated to tilt the roller receiving portion 68A. Then, the engaging roller 44 is disengaged from the roller receiving portion 68 and tends to fall downward, but the engaging hook 43a formed on the engaging roller 44 and the tiltable hook receiving portion on the lifting cylinder 63 side. Since the (horizontal) 45 is engaged, the engagement roller 44 does not fall.

  In this state, the piston rod 63a of the elevating cylinder 63 is advanced and extended downward. Then, the vertically moving rod 34 is lowered while being guided by the guide block 32. For this reason, the workpiece W held by the hanging arm 38 and the workpiece holding jig 36 on the vertical movement rod 34 is lowered to the hot washable position, and the engagement roller 44 is engaged with the sub guide rail 30A.

  Thereafter, the tiltable hook receiving portion 45 is tilted to release the engagement with the engagement hook 43aa, and the piston rod 63a of the elevating cylinder 63 is retracted. Then, the tiltable hook receiving portion 45 is raised to the original position and then returned to the horizontal position. In this way, the engagement hook 43a of the next wheel holding member 43 stands by so as to be engageable.

  In this state, the engagement roller 44 travels on the sub guide rail 30 </ b> A by performing pitch feed by the drive chain device 14 by the operation of the synchronous motor 22. At the same time, the engaging roller 44 holding the next workpiece via the up-and-down moving rod 34 is positioned at the tiltable roller receiving portion (falling sliding member receiving portion) 68A at the hot water start position, and the engaging hook 43a is allowed. It is located in the fall hook receiving part 45 and engages.

  When the workpiece W is positioned at the hot water washing end position, the piston rod 63a of the elevating cylinder 63B is contracted and the engagement hook 43a is engaged with the hook receiving portion 45 in the reverse direction. The work W is raised by the action of the moving rod 34, and the engagement roller 44 comes to a height position at which the engagement roller 44 can be engaged with the main guide rail 30. In this state, when the first auxiliary cylinder 69 is operated to return the roller receiving portion 68B to the horizontal state, the engaging roller 44 is engaged with the roller receiving portion 68B, and the main guide rail 30 can be driven by pitch feed. Become.

  The hot water bath 64 includes a sheathed heater (plug heater) 66 (two in the illustrated example) that is a temperature control means, and water can be circulated by a circulation pump 76. Note that connection piping between the discharge ports / suction ports 76a and 76b of the circulation pump 76 and the bottom inlet 68a and outlet 68b of the hot water tub 64 is omitted in the drawing.

  In the above, as shown in FIG. 9, from the viewpoint of improving the hot water washing efficiency, the circulation pump 76 is connected to a manifold type jet nozzle (for example, a copper pipe) 77 arranged below the work, and the hot water is supplied from the jet nozzle 77. May be circulated. In the case of a work having a depression on the lower surface, it is effective because air can be extracted.

  The immersion tank 60 includes a propeller-type stirrer 78. Further, a liquid replenishing bowl 80 is attached to the front side of the immersion tank 60, and a drain pipe 82 is attached to the bottom.

  Also in this immersion, when the chemical solution has a depression at the bottom, the chemical solution may not adhere, and as in the case of hot water washing, as shown in the model diagram of FIG. 9, the jet nozzle connected to the circulation pump 76A It is desirable to circulate the chemical liquid from below the workpiece W using (for example, a copper pipe) 77A.

  Desirably, the hot water bath 64 and the dipping bath 60 can be automatically supplied with water or chemicals that have been reduced due to evaporation of water or taking out chemicals (especially when the workpiece is tall as shown in FIG. 9). ). That is, automatic water supply is performed by detecting the liquid level of the hot water bath 64 and the immersion bath 60 with the level sensors 61 and 61A and controlling the electromagnetic valves (not shown) provided in each water supply pipe. In FIG. 9, the chemical liquid tank has a double structure 60, 60 ′, and the inner immersion tank 60 ′ is an overflow type provided with an overflow pipe 60 a so that the chemical liquid height does not fall below a certain level. .

  Since FIG. 9 is also a model diagram, there is no dimensional and shape matching with the other drawings as in the case of FIG.

  Furthermore, it is desirable to provide a plurality of pressure ventilation fans (not shown) from the transport / lifting mechanism side toward the hot water washing tank 64 and the immersion tank 60 and to blow air toward the hot water washing tank 64 and the immersion tank 60 side. . It is possible to suppress problems such as the generation of rust caused by steam rising from the hot water washing tank 64 and the immersion tank 60 entering the transport / lifting mechanism.

  The drip device 54 includes a drip tank 84 in which a plurality of air nozzles 86A and 86B (see FIGS. 7A and 7B) arranged up and down toward the axial center are provided, and the workpiece W has a height of the air nozzle. Within a range, it is possible to move up and down repeatedly for a short stroke.

  Here, the air nozzle 86 </ b> A includes a discharge port so that the air nozzle 86 </ b> A can inject from the up / down / front / rear / left / right directions. Air can be injected into the air nozzle 86A from a hot air generator 90 through a tank-type air pipe 92 having a rectangular cross section.

  The configuration of the elevating member 62C is the same as that of the elevating member 62 described above.

  In the present embodiment, the drip removal device 54 is disposed on the rear side in the workpiece moving direction of the hot water washing device 52 and the dipping device 48. A plurality of air nozzles 86 </ b> A are arranged so as to be able to inject air from the four sides around the work W so as to be able to inject air to the work, and a drip cutting (preliminary drip) device is attached. These air nozzles 86B are also connected to the hot air generator 90 via the tank type air pipe 92A as described above. A protective hood 88 surrounding the work and the air nozzle 86B is disposed.

  The drying device (drying means) 50 covers a plurality of pairs of air nozzles (air injection members) 86B arranged along the work flow direction and the air injection member 86B together with the work moving along the air injection member 86B. The air injection member is connected to the hot air generator via a tank type air pipe 92B. Further, the workpiece entrance / exit side wall 96 of the drying hood 94 is configured to include a minimum passage opening 96a through which the workpiece can pass.

  Each air nozzle 86 is formed of a copper pipe so that the air ejection direction can be adjusted.

  In addition, sensors including various position switches are arranged in this apparatus. The explanation of the operation is obvious to those skilled in the art and will be omitted.

  For example, a position switch pair 95 that restricts the stroke is attached to each lifting cylinder 63 and clamp cylinder 47 that lifts and lowers the workpiece at each station, and a transmissive sensor pair 96 is disposed at each station. Reference numeral 97 denotes a short stroke regulation intermediate proximity sensor at the dropping station. Reference numeral 98 denotes a level sensor (liquid level meter), and 99 denotes a temperature sensor (thermometer).

  Next, usage modes of the above embodiment will be described.

  First, after filling the hot water bath 64 with water, the sheathed heater 66 is turned on, and the circulating pump 76 is operated to make hot water or hot water (for example, 30 to 80 ° C.) in the hot water bath 64. Further, after the immersion tank 60 is filled with a lubricant layer forming agent (chemical solution), the continuously variable agitator 78 is put into an operating state. The drive chain device 14, the hot air generator 90, the elevating cylinders (air cylinders) 63 for the elevating members 62, 62A, 62B, and 62C and the clamp cylinder 47 for the jig clamping device 46 can be operated by each cylinder control signal. Keep it as

  First, the workpiece unloading / loading robot 58 causes the workpiece W to be loaded into the workpiece unloading / loading positions S1 and S2, and the workpiece moving device 12 is driven by the drive chain device 14 to position the workpiece holding jig 36. . In this state, the clamp cylinder 47 of the clamp device 46 is operated to clamp and stabilize the workpiece holding jig 36, and subsequently the clamp 58a of the workpiece unloading / loading robot 58 is released. Then, the work W falls by its own weight onto the work holding jig 36. At this time, the outer periphery of the upper end of the set column portion 36b of the workpiece holding jig 36 and the inner side of the tip claw portion of the radiation receiving portion 36a are guide slopes, so that the workpiece W is substantially concentric with the workpiece holding jig 36. Retained.

  Subsequently, after the clamp cylinder 47 is operated to release the clamp of the workpiece holding jig 36, the drive motor (synchronous motor) 22 of the workpiece moving device 12 is operated for a predetermined time (for example, 1 s) and stopped for a predetermined time (for example, 4 s), the plurality of workpiece holding members 16 are conveyed in synchronization between the positions of each station (washing / dipping / dropping) and stopped at each station for a predetermined time.

  At this time, in each station (excluding the hot water washing start position and hot water washing end position), the engagement roller 44 of the work holding member 16 is positioned in the roller receiving portion 68 of each of the elevating members 62 and 62C. In this state, when the air cylinder (elevating cylinder) 63 of the elevating member is operated to advance (lower) the piston rod, the work holding member 16 is suspended through the engagement of the engaging roller 44 by the roller receiving portion 68. Descend while being lowered. Then, it is lowered to a predetermined position and stopped or reciprocated for a short stroke for a predetermined time (for example, 3 to 4 s). After that, when the lifting cylinder 63 of the lifting members 62 and 62C is operated again to retract (lift) the piston rod, the workpiece holding member 16 engages with the roller receiving portion 68 of the engaging roller 44 as described above. The roller receiving portion 68 returns to the constituent position of the main guide rail 30 and the engaging roller 44 can travel on the main guide rail 30.

  Moreover, the aspect of raising / lowering in the hot water washing station is as described above.

  Here, in the hot water washing station, the hot water temperature of the hot water washing tub 64 is preferably 30 ° C. or higher, preferably about 50 ° C. This is because the cleaning effect is enhanced. In addition, by washing with hot water before the work is immersed, the chemical solution in the immersion tank 60 is warmed, and uniform application to the work W becomes possible, and the drying efficiency is further improved. In addition, pure water with good detergency may be used as water.

  When hot water washing is performed, as shown in FIG. 9, a heater (for example, a throwing heater) 66 and a thermometer (resistance temperature detector) 67 are arranged in the hot water bath 64, and the temperature signal of the thermometer 67 is the heater. The temperature can be controlled by inputting it to the operation unit 66.

  In addition, in the drip-cutting, the drip-cutting property is improved by moving the air nozzle 86 up and down from the upper and lower sides of the surrounding area in a short stroke up and down to improve the drip-cutting property and the leveling property of the lubricating layer. Formation is possible.

  Thus, hot water washing (hot water washing), immersion, and drip cutting are performed at each station.

  In addition, between the hot water washing station and the immersion station, and between each of the immersion station and the drip cutting station, dropping (dropping) of the work after hot water washing and after immersion is performed by air blow. This drop-cutting between stations makes it possible to form a lubricating layer with good leveling properties.

  After passing through these stations, the work is transferred to the drying station and baked or dried. At this time, since each drying air nozzle 86B is blown through the tank type air pipe 92B, the pressure loss is small and it is easy to ensure the amount of dry air as compared with the pipe type pipe.

  At this time, the temperature of the hot air from the hot air generator 90 is set to 20 to 150 ° C., preferably 40 to 120 ° C., at the drop-cutting and drying (baking) air nozzle exit. Here, it is desirable to carry out the adjustment while adjusting the strength of the air blow and the atmospheric temperature, as described above, since it is easy to ensure the leveling property (uniformity) of the coating film. This is because a particularly high leveling property is required when cold working (forging, pressing, rolling, etc.) is performed.

  In this way, the workpiece (processed product) that has undergone the drying step is again carried out by the workpiece carry-out robot 58 at the carry-out station S1, placed on the start end of the workpiece carry-out conveyor 55, and conveyed to the next processing step. Thereafter, a work (unprocessed product) is carried in by the work carry-in robot 58A at the carry-in station S2, and each process is repeated again.

  In the above embodiment, the case where the workpiece is automatically carried in and out by being held by one or a plurality of workpiece jigs has been described as an example. However, the continuous immersion treatment apparatus of the present invention has a plurality of workpieces in the basket (籠) G. W can be inserted and held at the lower end of the vertically moving rod 34 shown in FIG. In this case, the work is carried out and carried in by the worker.

  In addition, the description in FIG. 10 attaches | subjects the corresponding figure code | symbol in above-mentioned embodiment, and abbreviate | omits. In addition, FIG. 10 (A) shows a mode of placing the workpiece W in the basket G.

  In the case of this cage, it is desirable that air is ejected from a flat (slit) nozzle and droplets are cut by an air curtain from above and below. This is because uniform and high-speed air injection is possible and the leveling property (uniformity) of the coating film is ensured. Of course, the drip cutting by the air curtain can also be applied to the case where the workpiece is held by a jig.

  In addition, although the above-mentioned air curtain may be sufficient as droplet cutting, it may replace with the method by a some air nozzle, or may combine.

It is a flowchart which shows an example of the lubricating layer formation process of the conventional metal raw material. It is the expansion | deployment plane flowchart which showed the plant apparatus modelly. It is the whole schematic front view of FIG. 2 (state which removed the front hood). It is a side surface schematic fragmentary sectional view of FIG. Similarly, it is a schematic plan view (with the workpiece removed). It is a perspective view of a workpiece holding jig. (A) * (B) is an elevation figure and a top view showing air nozzle arrangement of a drip cutting device. It is a model figure of the workpiece replacement mechanism used in the hot water washing apparatus of this invention. It is a model figure which shows another aspect of the hot water washing and immersion in the continuous immersion processing apparatus of this invention. It is a side schematic sectional drawing at the time of changing the continuous immersion processing apparatus of the jig | tool holding | maintenance system of this invention to a basket processing system.

Explanation of symbols

12 Work moving device (work moving means)
14 Drive chain device (endless drive member)
16 Work holding member 30 Main guide rail 30A Sub guide rail 32 Guide block 36 Work holding jig 44 Engagement roller 43a Replacement hook 45 Replacement arm receiving part 48 Submerging device 50 Drying device 52 Droplet Cutting device 62, 62A, 62B, 62C Elevating member 63 Elevating cylinder 64 Hot water bath (hot water bath)
68 Retractable roller holder

Claims (4)

A continuous immersion treatment device for continuously applying immersion treatment to a workpiece,
An endless work moving means for circulating the work is provided, and an arbitrary position around the work moving means is defined as a work carry-out position and a work carry-in position continuously in the movement direction of the work. Between them, water washing means (including hot water washing means), dipping means and drying means are arranged in the order of the workpiece movement direction,
The work moving means includes an endless drive member and a work holding member attached to the endless drive member at a predetermined pitch so as to be movable up and down, and is capable of pitch feeding at a predetermined cycle .
An annular guide rail is provided above the endless drive member so as to correspond to the outer periphery locus,
The work holding member is attached to the endless drive member so as to be integrally movable at a predetermined pitch, and is attached to a vertical movement rod fitted and supported by a guide block having a guide hole in the vertical direction, and attached to a lower end of the vertical movement rod. A workpiece holding jig, and a sliding member and an engaging hook that slide on the guide rail at an upper end portion of the vertical movement rod, the workpiece holding member can be circulated, and
The washing means is
A washing tank, and a pair of elevating members disposed above the washing tank,
One of the pair of elevating members is arranged at the washing start position, the other is arranged at the washing end position, a part of the guide rail at the washing start / end position is a foldable sliding member receiving portion, A retractable hook receiving portion that engages with an engaging hook and moves up and down integrally with the piston rod of the lifting cylinder of the lifting member is provided, and the engaging hook and the tiltable hook receiving portion are engaged / released to The moving rod can be moved up and down, and further, a sub guide rail is arranged between the washing start / end positions below the guide rail,
Between the washing start / end positions, the workpiece is held at a washing height and can be moved horizontally.
A continuous immersion treatment apparatus characterized by the above. 2. The continuous immersion treatment apparatus according to claim 1 , wherein a jet nozzle directed to the lower surface of the workpiece is arranged at each workpiece stop position of the water washing means and / or the immersion means. The continuous dipping treatment apparatus according to claim 1 or 2, wherein a drip-cutting means is disposed in front of the drying means, and an air curtain generating means is included as the drip-cutting means. 4. The continuous immersion treatment apparatus according to claim 1, wherein the water washing means is a hot water washing means.

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