WO2004048036A1

WO2004048036A1 - Surface treatment device using barrel

Info

Publication number: WO2004048036A1
Application number: PCT/JP2002/012417
Authority: WO
Inventors: Toru Matsubara
Original assignee: Macoho.,Ltd
Priority date: 2002-11-28
Filing date: 2002-11-28
Publication date: 2004-06-10
Also published as: CN1668423A; KR100907854B1; CN100434235C; KR20050083643A; AU2002354069A1

Abstract

When a plurality of treatments such as a wet blasting and a chemical conversion coating are performed, works are placed from one barrel to another as the treatment precedes to the next step and dents care formed on works through collision of the works with each other. It is possible to provide a surface treatment device using a barrel capable of preventing this. When one treatment is completed in one step, the barrel (2-1) containing the works (1) are moved and carried to the next step. In the next step, a barrel (2-2) is waiting while being immersed in a solution (6). The barrel (2-1) in the previous step is tilted to direct its opening downward, so that the works (1) in the barrel of the previous step slide along a chute (4-1), and loosely drop. The dropped works reach the solution (6) and sink into the barrel (2-2) in the solution (6). The works (1) are dropped one after another. However, the works immediately land on the solution, sink in the solution in a slow movement, and no dents are formed thereon even when the works collide with each other.

Description

Description Surface treatment equipment using barrel

The present invention relates to a surface treatment apparatus for a workpiece in which a plurality of processes are continuously performed on one workpiece, and in particular, a surface treatment using a barrel suitable for processing a back plate such as a brake lining or clutch facing. Equipment related. Conventional technology

A friction member used for a disc brake pad, a rake, a clutch plate and the like of an automobile is generally formed by integrally bonding a back plate made of an iron-based metal to a friction material.

These friction members are moved relative to each other while being pressed between the disk opening and the clutch plate of the other party, and the frictional force at that time is used to brake the automobile or to control the engine. It transmits the driving force to wheels. Therefore, a large shearing force is applied between the friction material and the back plate. Therefore, a strong adhesive force that can withstand this shearing force is required between the friction material and the back plate. Conventionally, to obtain a strong adhesive force suitable for this purpose, the bonding surface of the back plate has been roughened to a surface roughness (center line average roughness) Ra = l to 3 zm to increase the bonding area. And increasing the adhesive force. In addition, if an oxide film or the like is present on the adhesive surface of the back plate, the adhesive strength may be reduced. Therefore, it is also important to take both measures to remove the mackerel and the oxide film and prevent the mackerel.

From this point of view, conventionally, a conversion coating of zinc calcium phosphate having a thickness of about 3 to 5 Aim has been formed on the above-described back plate from which the roughened surface and the oxide film and the like have been removed. Then, a primer was applied and baked to form a single layer of the primer having a thickness of about 15 to 25 / m. In other words, the chemical conversion coating and the primer layer play the role of a saber. On the other hand, when bonding with a friction material, a new adhesive is applied on the primer layer, and the primer layer is bonded with the newly added adhesive. And

By the way, if the surface roughness of the back plate is too large, when a primer layer is formed, a portion penetrating through the primer layer is formed, and a mackerel is generated from the portion and reaches the inside. Conversely, if the surface roughness is too small, no improvement in adhesive strength can be expected. Therefore, it is desirable to obtain the maximum surface roughness within a range where there is no risk of breaking through the primer layer. This range is about Ra = l to 3 zm described above. Therefore, in each of the above steps, the step of roughening the back plate is very important. Therefore, a conventional method of this roughening will be described below.

The back plate is formed from a steel plate or the like by punching with a press or the like. Before the forming process, a mackerel, an oxide film, or the like is formed on the surface of the steel plate. In addition, a large amount of lubricating oil or mackerel oil adheres during punching. The presence of these oils and oxide films will cause a decrease in adhesive strength, and should be removed.

Therefore, the formed back plate is degreased with a chlorine-based solvent to remove oil components such as gas-proof oil. Then, a wet blast treatment is performed to remove the attached oxide film and the like, and at the same time, the surface is roughened to the above-mentioned range of Ra = 1 to 3 Aim. At this time, if the wet blast water contains an alkali degreasing agent in several percent, the above degreasing treatment can be performed simultaneously.

After wet-plasting, the back plate is continuously processed in many steps, including water washing, conversion coating treatment, water washing, hot water washing, drying, application of a primer, drying, baking, application of an adhesive, and drying. Will be. The chemical conversion coating is performed by immersing the workpiece in a liquid such as iron phosphate, zinc phosphate, zinc calcium phosphate, etc.

The above continuous processing can be roughly divided into two methods. The first is a method of aligning the direction of a work (back plate), placing the work on a conveyor, and continuously receiving processing such as wet blasting while being conveyed on the conveyor. In this method, only one side of the work is treated, and on the other side, there is a problem in that the degreasing and chemical conversion treatments become uneven. In addition, during wet blasting, there was a problem that the workpiece was moved by the sprayed slurry and changed its direction, or fell off the conveyor.

Second, a plurality of workpieces were put into a barrel with an opening, and the slurry was sprayed from the jet blast while rotating the barrel with the workpieces in the barrel. In this method, the barrel is immersed in the liquid for treatment. With this method, the work rolls inside the barrel as the barrel rotates, so that the entire surface of the work can be evenly processed.

In this method, for example, the properties required for the barrel used in each process (chemical resistance, shape, etc.) are different. Also, if each process is moved with the work in the same barrel, Barrels are placed in each process because the process liquid is mixed, etc., and the process proceeds while transferring from the barrel of the previous process to the barrel of the next process.o Problems to be solved by the invention

When transferring workpieces between barrels from the previous process to the next process, position the barrel of the previous process above the barrel of the next process, and turn the barrel of the previous process upside down to separate the workpiece in the bottom. The easiest way to put it in a barrel is to transfer it quickly. However, in this method, the workpieces collided with each other, and it was easy to make dents on the workpiece. If dents are formed, the chemical conversion film in that area will be broken, causing the formation of mackerel and weakening the adhesive strength with the friction material.

An object of the present invention is to solve such a problem, and it is an object of the present invention to provide a surface treatment apparatus using a barrel that does not cause dents on a work when transferring from a barrel to a barrel. Means for solving the problem

In order to achieve the above object, a surface treatment apparatus using a barrel according to the present invention includes a barrel into which a plurality of plate-like workpieces are charged, a rolling device for rotating and moving each barrel, and a plate discharged from the barrel. And a shot for receiving the workpiece and charging the workpiece into the next barrel. The barrel for receiving the workpiece supplied from the chute can be arranged so as to be positioned in the liquid in the processing tank by the rolling device. It is characterized by:

The liquid may be a processing liquid for immersing and processing the work, or the rolling device may rotate while inching the barrel, and the work contained in the barrel may be gradually reduced to the next step. Or a configuration that shifts to a barrel. The workpiece is a pack plate of a friction material, and the plurality of barrels include one for pet blast and one for chemical conversion treatment, and the ratio of the number for wet blast to the number for chemical conversion treatment is n (integer): 1 It is desirable to adopt the configuration described below. When a plurality of barrels are continuously arranged for the same processing step, a configuration may be adopted in which the barrels can be moved without transferring the work between the barrels. Action

The processing in one step is performed with the work in the barrel. For example, a jet blast slurry is sprayed from a gun toward the barrel in the work to perform the pet blast treatment, or the work is immersed in the treatment liquid together with the barrel to form a chemical conversion coating.

When the processing in one process is completed, the rolling device moves the barrel containing the work and carries it to the next process. In the next process, the barrel stands by in the liquid. The rolling device rotates and tilts the barrel of the preceding process so that the opening thereof faces downward, and drops the work in the barrel of the preceding process onto the chute. The dropped work lands on the liquid, then sinks and is stored in the barrel submerged in the liquid. Workpieces come one after another, but the work quickly enters the liquid, slowing down the movement due to the resistance of the liquid. Even if the workpieces collide with each other, the momentum is weak and no dents are formed. . BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a diagram illustrating a surface treatment apparatus using a barrel according to the present invention. Embodiment of the Invention

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram schematically showing the movement of a barrel of a surface treatment apparatus using a barrel according to the present invention. Work 1 in this embodiment is a back plate of a friction member.

The work 1 is formed by punching out a steel sheet by a press or the like. As described above, this includes the oxide film adhered to the surface of the steel sheet before forming. A large amount of used lubricating oil / anti-reflection oil is attached. Therefore, first, as shown in Fig. 1 (a), put it in the barrel 2-1 and set it in the gate blasting device, rotate the barrel 2-1 around the center axis, and use the blast gun 3 to grind the abrasive grains. And a slurry containing water and an alkaline degreasing agent are sprayed to perform wet blast treatment. The work 1 is degreased, the mackerel and the oxide film are peeled off by the abrasive grains contained in the slurry, and the work 1 is roughened to a range of Ra = 1 to 3 μm.

(4) After the etching process, the barrel 2-1 is moved by a rolling device (not shown) and carried to the next washing step. In the water washing step, water is put into the treatment tank 5 as the liquid 6, and the barrel 2-2 of the next step is immersed almost entirely in the liquid by the rolling device provided in this step and stands by. are doing. The opening of barrel 2-2 is located on the upper side.

On the other hand, the rolling device of the wet blast processing device moves the barrel 2-1 of the previous process onto the barrel 2-2 of the next process. Next, the rolling device rotates the barrel 2-1 as shown by the arrow so that the opening faces downward. No., "Rell 2-1 is provided with a plate-shaped shroud 4-1 along the opening. The work 1 in the barrel 2-1 slides on the chute 4-1 from the opening. Conventionally, this projecting work 1 was dropped into the next process barrel 2-2 in the air, so that the works 1 collided with each other in the barrel 2-2, and dents were easily formed.

However, in the present invention, the projecting work 1 immediately comes into contact with the liquid 6 and sinks. The work 1 is accommodated in the barrel 2-2 because the opening of the barrel 2-2 for the next process is provided at the position where the water has just landed. In the liquid, the movement of the work 1 is much slower than in the air. Therefore, even if the works 1 collide with each other, the energy of the collision is small and no dent is formed. Thereafter, the work 1 is washed together with the nozzle 2-2 by dipping the barrel 2-2 in the liquid 6 and rocking in the liquid.

When the washing is completed, the norell 2-2 is pulled up from the liquid 6 by the moving means and moves to the next chemical conversion treatment step shown in (c). In the chemical conversion coating treatment step, there is a liquid 8 containing any of iron phosphate, zinc phosphate and zinc calcium phosphate in the treatment tank 7, and the barrel 2-3 in the next step is immersed almost completely in this liquid 8. Waiting. The opening of barrel 2-3 is located on the upper side.

On the other hand, barrel 2-2 in the previous process has a shoot 4-2, and barrel 2-3 in the next process When it comes over, the rolling device rotates it as shown by the arrow so that the opening faces downward. As a result, the top 1 in the middle slides on the shoot 4-1 2 through the opening of the barrel 2-1 and jumps out to the outside.

The work 1 that has protruded immediately reaches the liquid 8 and sinks. At the position where the water has just landed, there is an opening for the barrel 2-3 in the next process, and the work 1 is accommodated in the barrel 2-3. At this time, even if the workpieces 1 collide with each other, the energy of the collision is small, and no dent is formed.

Although not shown in the figure, the above-mentioned transfer operation is repeated, and the wet blasting process is carried out by water washing. Assuming that (c) is the last previous step, when this step is completed, the barrel 2-3 is pulled up from the liquid 8, and the barrel 2-3 is dried with the work 1 remaining. At this time, the transfer of the work 1 from the barrel to the barrel is not performed, and the movement of the barrel in each process is performed by a rolling device provided in each process.

In the above embodiment, when the work 1 in the barrel of the previous process is transferred to the barrel of the next process, when the opening of the barrel of the previous process approaches below and the work 1 is about to jump out of the opening, the rolling device is activated. It is desirable to rotate the barrel while gradually inching the barrel in small increments. By doing so, the work 1 in the barrel gradually shifts to the barrel of the next process, and the number of collisions can be further reduced.

In the above embodiment, when comparing the pet blasting step (a) with the chemical conversion treatment step (c), the wet blasting step takes almost twice as long. Therefore, if the wet blast process and the chemical conversion treatment process are performed in a 1: 1 ratio, the プラス et blast process becomes rate-limiting. If the processing time of one shot blast is reduced in order to increase the processing speed, processing unevenness occurs.

In order to solve this problem, it is recommended that the number of the jet blasting steps be twice the number of the chemical conversion treatment steps. Specifically, in FIG. 1, the wet blast step is added again after the gate blast step (a). In this case, it is not necessary to transfer the work 1 from Norrelka to Norrel. Also, in this embodiment, ヅ Since the time of the toplast process was almost twice as long as that of the chemical conversion coating process, the ratio was set to 2: 1. If it is 1.8 times, various allocations are possible, such as two consecutive steps of 0.9 times.

In the above example, the liquid 6 and the liquid 8 also served as the processing liquid. However, even in the case where there is a processing step that is not immersed in the liquid and is not processed, it is possible to prevent dents by preparing a processing tank filled with water and soaking the barrel in this to receive the work 1 from the previous process It is convenient because it can be done.

Further, when the barrel of the next process is immersed in the liquid, it is sufficient that the work 1 in the previous process can be transferred in the liquid, and it is not always necessary to immerse the entire barrel in the liquid. The invention's effect

As described above, the work processing method of the present invention repeats processing the work in the barrel in a state where the work is put in the barrel, transferring the work in the processed barrel to the barrel of the next process, and processing the work at least once. In a surface treatment device using a barrel, the barrel of the next process is immersed in the liquid, and the barrel of the previous process is moved above it to transfer the work inside to the barrel in the liquid. The workpieces collided in the liquid, reducing the impact of the collision and preventing the occurrence of dents.

If the barrel of the previous process is rotated while being inching, and the accommodated workpiece is gradually transferred to the barrel of the next process, the collision itself between the workpieces can be reduced, and the effect of preventing dents can be reduced. Is improved.

The workpiece is a back plate made of a friction material. The plurality of steps include a pet-plast step and a chemical conversion treatment step, and the ratio of the number of the pet-plast steps to the number of the chemical conversion treatment steps is n (integer): 1. With this configuration, the tact time of assembly work can be reduced, and productivity can be improved.

Claims

The scope of the claims

1. A barrel into which a plurality of plate-like works are charged, a rolling device for rotating and moving each barrel, and a chute for receiving the plate-like work discharged from the barrel and throwing the work into the next barrel. A surface treatment apparatus using a barrel, characterized in that a barrel for receiving a work input from the chute can be arranged so as to be located in a liquid in a treatment tank by the rolling device.

2. The surface treatment apparatus using a barrel according to claim 1, wherein the liquid is a treatment liquid for immersing and treating a workpiece.

3. The barrel according to claim 1 or 2, wherein the rolling device is rotatable while inching the barrel, and the work accommodated in the barrel is transferred little by little to the barrel of the next process. Surface treatment equipment used.

4. The work is a back plate of a friction material, and the plurality of barrels include a wet-plast and a conversion coating, and the ratio of the number of wet-plasts to the number of conversion coatings is n (integer). The surface treatment apparatus using the barrel according to any one of claims 1 to 3, wherein:

5. The barrel according to claim 4, wherein, when a plurality of barrels are continuously arranged for the same processing step, the barrel can be moved without transferring the work between the barrels. Surface treatment equipment used.