JP2010077486A - Electrolytically phosphating chemical-conversion treatment method and apparatus therefor - Google Patents

Abstract

Disclosed is an electrolytic phosphate chemical treatment method and apparatus that enables downsizing of equipment and control of reaction, can be installed in a part processing line, and can be installed in connection with other mechanical equipment.
A pre-treatment step for pre-treating a surface of an object to be processed by mounting the object to be processed put on the process step on a first circular rotating body and the pre-processed object to be processed After finishing the phosphate chemical conversion treatment step for forming a phosphate chemical conversion film on the surface, the object to be processed is transferred from the first circular rotating body to the second circular rotating body, and then the phosphate chemical forming film A post-processing step is performed to post-process the surface of the object to be processed, and the object to be processed is taken out. The robot performs the input of the workpiece to be processed, the transfer to the post-treatment step of the workpiece subjected to the phosphate conversion treatment, and the removal of the post-treated workpiece.
[Selection] Figure 1

Description

  The present invention relates to an electrolytic phosphate chemical treatment method for forming a phosphate chemical conversion film on a metal material surface and an apparatus therefor.

  The phosphate chemical conversion treatment is widely used for the coating base treatment of workpieces (parts) (workpieces) such as steel materials, lubrication treatment for cold forging, and the like. There are two methods of phosphate chemical treatment: electroless treatment technology (treatment that does not use an external power source to form a phosphate chemical film) and electrolytic treatment technology (treatment that uses an external power source to form a phosphate chemical film). Divided.

  In the electroless treatment, an electrochemical reaction formed between a reduction reaction of metal ions in a solution and an oxidation reaction of an oxidizing agent added to the solution is used. In electroless treatment, crystallization (sludge formation) of phosphate other than the surface of the object to be treated inevitably occurs, so it is difficult to efficiently control the film formation. Further, as described above, since it is difficult to reliably control the reaction in the electroless treatment, the treatment in a small amount and in a short time is difficult, and the treatment in a large amount and for a long time is common. That is, it is customary to use a large device (general-purpose device).

  On the other hand, in the electrolytic treatment, the reaction in the bath is limited to the surface of the object to be treated and the film formation reaction is performed, so that sludge is not substantially formed. Moreover, in order to perform reaction efficiently, time is shortened compared with an electroless process, and it can implement even with a small quantity. Therefore, the processing apparatus can be reduced in size, and the processing equipment can be arranged in a series of processing lines for the entire part processing. Such arrangement of the phosphate chemical treatment apparatus on the machining line cannot be realized by a conventional large apparatus (Japanese Patent Laid-Open Nos. 2000-234200, 2002-322593, and 2006). No. 307289, Japanese Patent Laid-Open No. 2007-23334).

JP 2000-234200 A JP 2002-322593 A JP 2006-307289 A JP 2007-23334 A

  The present invention solves the above-mentioned problems, enables downsizing of the equipment and control of the reaction, and is therefore incorporated in a part processing line and can be installed in connection with other mechanical equipment. An acid chemical conversion treatment method and an apparatus therefor are provided. For example, it can be installed in a forging line as a forged lubricating film forming apparatus, and processing can be performed in accordance with the forging press processing speed. When installing a lubrication processing facility in a machining line, it is desired that the facility is small in area and simple and that the facility can be easily moved (moved). The present invention solves such problems by making the equipment small, simple, and easy to move.

  The present invention provides the following inventions in order to solve the above problems.

(1) In the electrolytic phosphate chemical treatment method for forming a phosphate chemical conversion film on the surface of the object to be treated, the electrolytic phosphate chemical treatment method uses the object to be treated as a treatment step. A charging step (A) for charging, a pretreatment step (B) for pretreating the surface of the object to be treated, and a phosphate chemical film for forming a phosphate chemical conversion film on the surface of the object to be treated. Including a treatment step (C), a post-treatment step (D) for post-treating the surface of the article to be treated on which the phosphate conversion coating has been formed, and a dispensing step (E) for taking out the post-treatment subject to be treated The charged workpiece is mounted on the first circular rotating body, and after the pretreatment step (B) and the chemical conversion treatment step (C) are finished, Transfer from the first circular rotating body onto the second circular rotating body, and then perform the post-processing step (D). And the robot performs the input of the workpiece to be treated, the transfer to the post-treatment process of the workpiece subjected to the phosphate conversion treatment, and the removal of the post-treated workpiece. An electrolytic phosphate chemical treatment method;
(2) The above-mentioned process in which the same robot is used to input the workpiece to be treated, transfer it to the post-treatment process of the phosphate chemical-treated workpiece, and take out the post-treated workpiece ( 1) The electrolytic phosphate chemical treatment method according to 1);
(3) The pretreated object to be treated is taken out from the first circular rotating body, transferred to the electrolytic phosphate chemical treatment tank provided therein, immersed in the treatment, and then subjected to the phosphate chemical treatment. The electrolytic phosphate chemical treatment method according to (1) or (2) above, wherein the process is again returned to the first circular rotating body;
(4) The electrolytic phosphate chemical treatment method according to any one of (1) to (3), wherein the object to be treated is post-treated on the second circular rotating body by immersion;
(5) The electrolytic phosphate chemical treatment method according to any one of (1) to (4), wherein the object to be treated is a steel material or a non-ferrous metal material;
(6) Any one of the above (1) to (5), wherein the post-treatment is a treatment for forming a lubricating film or a coating film on the phosphate chemical conversion film of the object subjected to the phosphate chemical conversion treatment. The electrolytic phosphate chemical treatment method according to the description;
(7) Phosphate conversion treatment bath is phosphoric acid, phosphate ion, nitrate ion, metal ion dissolved in phosphoric acid solution to form complex with phosphate ion and / or ion dissolved in bath An electrolytic phosphate chemical treatment method according to any one of the above (1) to (6), which comprises a metal ion that is reduced to form a film;
(8) An electrolytic phosphate chemical treatment apparatus for forming a phosphate chemical conversion film on the surface of an object to be treated. The electrolytic phosphate chemical treatment apparatus includes first and second circular rotating bodies and a robot. Including
The robot (a) loads and mounts the workpiece to be treated on the first circular rotating body; (b) pretreatment and pretreatment to clean the surface of the workpiece A phosphate chemical conversion treatment to form a phosphate chemical film on the surface of the workpiece is transferred from the first circular rotating body to the second circular rotating body; An electrolytic phosphate chemical treatment device configured to take out a workpiece whose surface has been post-treated from the second circular rotating body;
(9) The electrolytic phosphate chemical treatment apparatus according to (8), wherein there is one robot;
(10) An electrolytic phosphate chemical treatment tank is provided adjacent to the first circular rotating body, and the pretreated object to be treated is taken out from the first circular rotating body, and the electrolytic phosphate chemical conversion is taken. After being transferred to the treatment tank and subjected to immersion treatment, the electrolytic phosphatization is performed from the first circular rotating body so that the workpiece subjected to the phosphate conversion treatment can be returned again to the first circular rotating body. The electrolytic phosphate chemical conversion treatment apparatus according to (8) or (9) above, which is provided with a transfer mechanism to the chemical treatment tank; and (11) a post-treatment tank is provided on the second circular rotating body. The electrolytic phosphate chemical treatment device according to any one of (8) to (10),
It is.

  According to the present invention, it is effective for downsizing of the apparatus, the transfer (transfer) of the objects to be processed is concentrated in one place in the facility, and the length of the facility is combined with a circular turntable processing device. The direction and width direction can be consolidated.

  The electrolytic phosphate chemical treatment method of the present invention is an electrolytic phosphate chemical treatment method for forming a phosphate chemical conversion film on the surface of an object to be treated. An input step (A) to be charged, a pretreatment step (B) for pretreating the surface of the object to be treated, and a phosphate chemical treatment step for forming a phosphate chemical conversion film on the surface of the object to be treated. (C), the post-processing process (D) which post-processes the surface of the to-be-processed object which formed the phosphate chemical conversion film, and the discharge process (E) which takes out the post-processed to-be-processed object.

  In the present invention, the object to be processed (parts) (work) is a steel material or a non-ferrous metal material, and as the electrolytic phosphate chemical conversion treatment, it is preferable that the surface of the object to be processed be coated, forged and lubricated. Etc.

  The pretreatment step (B) for cleaning the surface of the workpiece is a step for removing dirt on the surface such as degreasing and washing. A surface conditioning treatment that facilitates the formation of a film may also be included in the pretreatment.

  The chemical conversion treatment step (C) for forming a phosphate chemical conversion film on the surface of the pretreated object is a step of forming a phosphate chemical conversion film (inorganic film).

  The post-treatment step (D) for post-treating the surface of the object to be treated on which the phosphate chemical film has been formed is a treatment for forming a phosphate chemical film and exhibiting necessary functions, for example, In the lubricating treatment, a lubricating film (organic soap or the like) is formed to form a lubricating function. In addition, when the phosphate chemical conversion treatment is applied as a coating base treatment, a coating film is formed as a post-treatment.

  Such post-treatment mainly forms an organic film. In contrast to direct post-processing on metals such as steel, the formation of a phosphate conversion coating on the metal surface greatly improves the post-processing function and can be used as a practical technology. Because.

  In the above three steps (B) to (D), it is preferable that chemical components from the previous step are not brought into the respective steps. Therefore, it is preferable to wash with water after the pretreatment step so that the chemical / oil component for degreasing in the pretreatment step is not brought into the phosphate chemical conversion treatment step. Furthermore, it is preferable to wash with water after the phosphate chemical conversion treatment step so that the chemical conversion treatment bath components are not brought into the next post-treatment step.

  Between the pretreatment process and the phosphate chemical conversion treatment process, the degreasing solution is an aqueous solution that can be dissolved in water even at room temperature, so the components from the previous process are brought into the subsequent process by passing the water washing process in the same facility. This can be easily prevented. However, it is preferable that the components of the phosphate chemical conversion treatment process are strictly divided between the phosphate chemical conversion treatment process and the post-treatment process so as not to be brought into the post-treatment process.

  In general, an organic component is used in the post-treatment process as described above. Therefore, between the phosphate chemical conversion treatment step and the post-treatment step is strictly divided by, for example, not sharing a conveying jig. That is, the pretreatment process and the phosphate chemical conversion treatment process can share the conveyance jig, but the phosphate conversion chemical treatment process and the post-treatment process generally cannot share the conveyance jig. is there.

  In the phosphate chemical treatment equipment, it is necessary to separate the phosphate chemical treatment process and the post-treatment process, including the transport jig, and in the case of downsizing, consider the simplification of the transport / transfer mechanism. It is necessary to produce equipment. According to the method of the present invention, two circular rotating bodies, that is, a circular turntable processing device and a robot, preferably the same robot, are used instead of separating and separating the transfer / transfer mechanism. By doing so, it is possible to reduce the size by consolidating the transport / transfer mechanism at the same position.

  The robot is not particularly limited as long as it is a machine that performs autonomous work that is autonomously continued to some extent, that is, a machine that performs extraction, transfer, and the like.

  In the method of the present invention, the charged workpiece is mounted on the first circular rotating body, and after the pretreatment step (B) and the chemical conversion treatment step (C) are finished, the chemical treatment treatment subject is processed. Is transferred from the first circular rotator onto the second circular rotator, and then the post-processing step (D) is performed, the workpiece to be processed is charged, and the phosphate chemical conversion processed workpiece The transfer to the post-processing step and the removal of the post-processed object are performed by a robot. Preferably, the same robot performs loading of the workpiece to be treated, transfer to the post-treatment process of the phosphate chemical-treated workpiece, and removal of the post-treated workpiece. It is.

  Further, in the method of the present invention, the pretreated object to be treated is taken out from the first circular rotating body, transferred to the electrolytic phosphate chemical treatment tank provided, and immersed, and then subjected to the phosphate chemical treatment. It is preferable to return the processed object to the first circular rotating body again. Furthermore, after the phosphorylated product is transferred to the second circular rotating body, it is immersed in a post-treatment tank provided on the second circular rotating body and post-processed.

  As the electrolytic phosphate chemical treatment bath in the present invention, for example, the composition, concentration, pH, temperature, etc. depending on the purpose based on the chemical treatment bath described in JP 2000-234200 A and JP 2002-322593 A, etc. Can be appropriately selected. As such a phosphating bath, phosphoric acid and phosphate ions, nitrate ions, metal ions that dissolve in phosphate solution and form complexes with phosphate ions and / or dissolve in the bath It is preferable to include metal ions that are reduced to form a film. The metal ions that dissolve in the bath with phosphoric acid and phosphate ions include zinc ions, manganese ions, and / or iron ions, while the ions that dissolve in the bath are reduced to form a film. Ions include nickel ions, copper ions, manganese ions, cobalt ions, iron ions and / or zinc ions.

  As an apparatus used for carrying out the method of the present invention, an electrolytic phosphate chemical treatment apparatus for forming a phosphate chemical conversion film on the surface of an object to be treated, the electrolytic phosphate chemical treatment apparatus, Including a first and a second circular rotating body and a robot, the robot (a) loading and mounting the workpiece to be processed on the first circular rotating body; A pretreatment for cleaning the surface and a phosphate conversion-treated object that forms a phosphate conversion film on the surface of the pretreated object are removed from the first circular rotating body. And (c) an electrolytic phosphate chemical treatment apparatus configured to take out the object whose surface has been post-treated from the second circular rotator. .

  Used by a single robot to load and load the workpiece to be processed, transfer it to the post-treatment process of the phosphate-treated workpiece, and take out the post-treated workpiece It is preferred that Therefore, the insertion, transfer, and removal places are arranged at positions where the robot works.

  In a preferred aspect of the apparatus of the present invention, an electrolytic phosphate chemical treatment tank is provided in addition to the first circular rotator, and the pretreated object is taken out from the first circular rotator. The first circular rotation is performed so that the workpiece subjected to the phosphate chemical conversion treatment can be returned to the first circular rotating body again after being transferred to the electrolytic phosphate chemical treatment tank and subjected to the immersion treatment. A transfer mechanism from the body to the electrolytic phosphate chemical treatment tank is provided. The transfer mechanism is not particularly limited, but for example, the workpiece set on the first circular rotating body is chucked with an electrolysis jig connected to an electrolysis power source. The electrolysis jig that chucks the object to be processed moves to the upper part of the electrolytic cell placed away from the first circular rotating body, and then immediately immerses the object in the electrolytic cell and operates the power source to perform the electrolytic process. To do. The object to be treated that has been subjected to the electrolytic treatment is lifted from the electrolytic cell while being chucked by the electrolysis jig, and then moved onto the first circular rotating body, where the original conveyance treatment of the first circular rotating body is performed. Set on the ingredients. During this time, the first circular rotating body is stopped.

  Furthermore, a post-treatment tank is provided on the second circular rotating body, and is configured to be able to perform post-treatment by immersing the workpiece.

  When the phosphate chemical treatment apparatus is applied as a lubrication processing apparatus for forging, it is common to install the lubrication processing apparatus as one process in forging parts processing and before forging. In that case, the lubrication processing apparatus is required to perform processing in accordance with the processing speed of the forging process in the subsequent process. More specifically, it is desirable to perform processing in accordance with the processing speed of the forging process (press) in the subsequent process. That is, if the forging process has a production / working capacity of 30 seconds / piece, it is preferable that the lubrication process is also performed with that capacity. This is because the processing capacity exceeding that amount causes the workpiece to stay before forging. The present invention is suitable for facilities that synchronize the production capacity with the preceding and following processes, and therefore it is possible to optimize the production scale.

  Furthermore, transportation and transfer at the same place as the consolidation of equipment will be described. Aggregation of equipment means minimizing as much as possible the part where workpieces (workpieces) are processed and moved. The workpiece moves through the processes of “input” → “pre-processing” → “chemical conversion processing” → “post-processing: lubrication processing” → “dispensing”. According to the present invention, the workpiece moves / transfers between the above processes. At the same time, the work transfer between processes can be summarized concisely.

  FIG. 1 shows a mode in which a lubricating treatment is performed as a post-treatment in the present invention. The workpiece is transferred from the loading conveyor to the equipment (on the first circular rotating body) by the “loading” (transfer 1). In “Pretreatment” → “Chemical conversion treatment”, when the workpiece is conveyed on the first circular rotating body and reaches the position of the chemical conversion treatment, the electrolytic phosphate chemical conversion treatment provided from the first circular rotating body is provided. It is transferred to a tank, and a chemical conversion film is formed by immersion and chemical conversion treatment. Then, it transfers in order to return again to a 1st circular rotary body from an electrolytic phosphate chemical conversion treatment tank (transfer 2). In the pre-treatment, the work is degreased in three stages (degreasing 1, 2 and 3), then washed in three stages (washing 1, 2 and 3), and then for prevention of charging by a titanium phosphate colloid or the like. Surface adjusted. The workpiece subjected to chemical conversion treatment is washed in two stages (water washing 4 and 5) and then transferred onto the second circular rotating body by the robot (transfer 3). Lubrication is performed in the lubrication treatment tank on the second circular rotating body to form a lubricant film. Next, the workpiece is transferred from the lubrication processing apparatus to the “dispensing” conveyor by the robot (transfer 4).

Hereinafter, the present invention will be described in more detail with reference to FIG. 1 and FIG.
Example 1
A short cylindrical workpiece of 33φ × 12.3L (material: S-15C) was lubricated. The process is in the order of “input” → “pre-processing” → “chemical conversion processing” → “post-processing” → “dispensing”. The equipment consists of a first circular rotating body (circular turntable processing device) that performs “pre-processing” → “chemical conversion processing” and a second circular rotating body (circular turntable processing device) that performs “post-processing”. Consists of

  These circular turntable processing devices convey two workpieces as one lot. That is, the conveyance is a method that is performed twice by a robot. The workpiece is transferred from the input conveyor to the first circular turntable processing device twice a by one. The first circular turntable processing apparatus moves one pitch every 42 seconds (the post-lubricating press has one processing every 23 seconds, so the processing speed was adjusted). Therefore, the transfer by the robot is performed every 42 seconds by the loading conveyor → the first circular turntable processing device, the first circular turntable processing device → the second circular turntable processing device, and the second circular turn. Three types of conveyance and transfer are performed: table type processing device → payout conveyor.

  In the processing equipment, processing is performed in the order of “input” → “pre-processing” → “chemical conversion processing” → “post-processing” → “dispensing”, and a lubricating film is formed.

  In the pretreatment, degreasing and water washing are performed in a shower. The chemical conversion treatment is performed by transferring the workpiece from the first circular turntable to the electrolytic cell. The lubrication treatment is performed by immersing in an 80 ° C. bath, for example.

  The electric control panel of this apparatus is placed under the input / output conveyor. Therefore, the device of the present invention shown in FIG. 1 includes an electric control panel (not shown), and has a length of 4 m, a width of 2.5 m, and a height of 1.5 m. The device including the electric control panel can be moved and transported without touching the electrical wiring in the facility.

Conventional lubrication processing apparatuses usually have a separate electric control panel, and it is difficult to carry and transfer them all at once to the electric control panel. Therefore, it is epoch-making that it can be moved and transported without touching the electrical wiring in the facility.
Comparative Example 1
The same cylindrical workpiece as in Example 1 was used for lubrication treatment by a conventional general apparatus schematically shown in FIG. The process was in the order of “input” → “pre-processing” → “chemical conversion processing” → “post-processing” → “dispensing”. The equipment is on the opposite side of input and withdrawal.

  It is necessary to transfer the work in three places: the “input” section, the “chemical conversion process” → the “post-processing” transfer section, and the “dispensing” section. Since each transfer part is separated, it is impossible to use the same robot.

  As in Example 1, the post-processing press processes one piece every 23 seconds. Therefore, when processing according to the processing speed is performed, the size of the apparatus shown in FIG. Although it is 3m in height and 1.5m in height, the electric control panel is not included because it is placed separately. Therefore, electrical work (disconnection / wiring) is indispensable when moving and transporting the apparatus.

  As described above, the apparatus shown in FIG. 2 is larger than the apparatus of the present invention and is disadvantageous in terms of relocation and conveyance.

  According to the method and apparatus of the present invention, it is effective for downsizing the processing apparatus, and the transfer of workpieces is concentrated in one place in the facility, and the processing direction of the facility is combined by combining a circular turntable processing device. -The width direction can be consolidated.

The schematic diagram which shows an example of the phosphate chemical conversion treatment apparatus of this invention. The schematic diagram which shows the conventional common phosphate chemical conversion apparatus used by the comparative example 1. FIG.

Claims (11)

In the electrolytic phosphate chemical treatment method for forming a phosphate chemical conversion film on the surface of an object to be treated, the electrolytic phosphate chemical treatment method includes:
An input step (A) for feeding the workpiece to be treated into the treatment step, a pretreatment step (B) for pretreating the surface of the workpiece, and a surface of the pretreated workpiece. A phosphate chemical conversion treatment step (C) for forming a phosphate chemical conversion film, a post-treatment step (D) for post-processing the surface of the workpiece on which the phosphate chemical conversion coating has been formed, and the post-treatment target A payout step (E) for taking out the processed product,
The charged object to be processed is mounted on the first circular rotating body, and after the pretreatment step (B) and the chemical conversion treatment step (C) are finished, the chemical conversion processed object to be processed is the first. Transferred from the circular rotator to the second circular rotator, and then the post-treatment step (D) is performed, and the workpiece to be treated is charged, and the phosphate chemical-treated workpiece Transfer to the post-processing step and take out the post-processed object by a robot.
An electrolytic phosphate chemical treatment method characterized by the above.   2. The process according to claim 1, wherein loading of the workpiece to be processed, transfer of the phosphate chemical-treated workpiece to a post-processing step, and removal of the post-treated workpiece are performed by the same robot. Electrolytic phosphate chemical conversion method.   The pretreated object to be treated is taken out from the first circular rotating body, transferred to an electrolytic phosphate chemical treatment tank provided for immersion, and subjected to immersion treatment. 3. The electrolytic phosphate chemical treatment method according to claim 1, wherein the electrolytic phosphate chemical conversion method is returned to the circular rotating body of 1.   The electrolytic phosphate chemical treatment method according to any one of claims 1 to 3, wherein the workpiece is post-treated on the second circular rotating body by dipping.   The electrolytic phosphate chemical conversion treatment method according to claim 1, wherein the object to be treated is a steel material or a non-ferrous metal material.   The electrolytic phosphatization according to any one of claims 1 to 5, wherein the post-treatment is a treatment for forming a lubricating film or a paint film on the phosphate chemical conversion film of the object subjected to the phosphate chemical conversion treatment. The processing method.   The phosphate chemical treatment bath reduces phosphoric acid and phosphate ions, nitrate ions, metal ions that dissolve in the phosphate solution and form complexes with phosphate ions and / or ions dissolved in the bath. The electrolytic phosphate chemical treatment method according to claim 1, further comprising a metal ion that forms a film. An electrolytic phosphate chemical treatment apparatus for forming a phosphate chemical conversion film on the surface of an object to be treated, the electrolytic phosphate chemical treatment apparatus including first and second circular rotating bodies and a robot,
The robot (a) loads and mounts the workpiece to be treated on the first circular rotating body; (b) pretreatment and pretreatment to clean the surface of the workpiece A phosphate chemical conversion treatment to form a phosphate chemical film on the surface of the workpiece is transferred from the first circular rotating body to the second circular rotating body; The object to be processed whose surface has been post-processed is configured to be taken out from the second circular rotating body.
Electrolytic phosphate chemical treatment equipment.   The electrolytic phosphate chemical treatment apparatus according to claim 8, wherein there is one robot.   An electrolytic phosphate chemical treatment tank is provided adjacent to the first circular rotator, and the pretreated workpiece is taken out from the first circular rotator, and the electrolytic phosphate chemical treatment tank is placed in the electrolytic phosphate chemical treatment tank. The electrolytic phosphate chemical treatment tank is transferred from the first circular rotating body so that the workpiece subjected to the phosphate chemical conversion treatment can be returned again to the first circular rotating body after being transferred and immersed. The electrolytic phosphate chemical conversion apparatus according to claim 8 or 9, further comprising a transfer mechanism.   The electrolytic phosphate chemical treatment apparatus according to any one of claims 8 to 10, wherein a post-treatment tank is provided on the second circular rotating body.

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