KR102642760B1 - Rack for accommodating annular parts and method - Google Patents

Abstract

The invention relates to a rack for receiving annular components, especially bearing rings or cages of rolling or sliding bearings, and for chemical or galvanic coating of the components in an electrolyte bath, the rack comprising one or more first a support frame having a drive unit, at least one second drive unit, and at least one first transverse brace arranged horizontally; one or more drive motors for driving one or more first drive units, wherein the one or more first drive units are connected to the one or more second drive units in such a way that they drive one or more second drive units; at least two drive pins disposed on at least one first transverse brace and rotatable about their longitudinal axis and arranged horizontally for receiving the annular components, wherein the at least two drive pins are connected to at least one second drive unit a drive pin connected thereto in such a way that it can be driven by; Includes. The invention also relates to a method for chemical or galvanic coating of annular components.

Description

Rack for accommodating annular parts and method

The invention relates to a rack for receiving annular components, especially bearing rings or cages of rolling or sliding bearings, and for chemical or galvanic coating of the components in an electrolyte bath. It's about (rack). The invention also relates to a method for chemical or galvanic coating of annular components, in particular bearing rings or cages of rolling or sliding bearings, in an electrolyte bath.

Already, racks for chemical or galvanic coating of components in an electrolyte bath are known, in which the components to be coated are attached to the rack and, in particular, clamped. In this case, the parts are fixed on a rack, and the rack is introduced by crane into different electrolyte baths for the deposition of a chemical or galvanic coating layer. In this case, the disadvantage is that in the area of contact positions between the part and the rack after coating, uneven layer thicknesses in the formed coating layer, contact traces, and/or layer defects due to not completely coated areas of the part. The point is that it can be confirmed.

Also known are tilting racks, in which parts are moved within an electrolyte bath by tilting during coating. As a result, visible layer defects in the area of contact positions between the part and the rack after coating are reduced, but not completely prevented.

Both known methods are used especially for parts with large external dimensions in the range from 10 to 300 cm.

Therefore, the object of the present invention is to provide a rack and a method for coating annular parts, which allows the quality of the coating layer formed to be clearly improved.

In the case of a rack for receiving annular components, especially bearing rings or cages of rolling or sliding bearings, and for chemical or galvanic coating of components in an electrolyte bath, the rack must be

- a support frame with at least one first drive unit, at least one second drive unit and at least one first transverse bracing arranged horizontally;

- at least one drive motor for driving at least one first drive unit, the at least one first drive unit being connected thereto in such a way that it drives at least one second drive unit; and

- two or more drive pins disposed on at least one first transverse brace and rotatable about their longitudinal axis and arranged horizontally for receiving annular components, wherein the two or more drive pins are one The driving pin is connected thereto in such a way that it can be driven by the second driving unit.

The rack of the present invention enables continuous rotational driving of the annular part to be coated using driving pins. As a result, the component can be moved evenly and continuously in the electrolyte bath, thereby ensuring a particularly uniform layer thickness and no layer defects.

Preferably, the at least one first drive unit comprises at least one first drive shaft arranged vertically, and the at least one second drive unit comprises at least one second drive shaft arranged horizontally, and the at least one second drive unit comprises at least one second drive shaft arranged horizontally. is drivably connected to one or more first drive shafts through one or more first worm gear units, and one or more drive motors are provided for driving the one or more first drive shafts.

Each first worm gear unit includes one first worm disposed on a first drive shaft and one first worm gear disposed on a second drive shaft, and the first worm drives the first worm gear. .

Alternatively, the first drive unit is formed via a belt drive, the at least one second drive unit comprises at least one horizontally arranged drive shaft, and the at least one drive motor is formed via a belt drive at least one second drive shaft. is connected to

Both variants of the first drive unit enable uniform and reliable drive of the second drive shaft(s) and thus a uniform coating process.

In this case, according to what has proven suitable, a second transverse brace is arranged parallel to each second drive shaft, this second transverse brace having one or more horizontally arranged auxiliary pins. ) includes. The auxiliary pin may be fixed or rotatable about its longitudinal axis. The auxiliary pins enable an improved and non-losing grip of the individual annular parts on the rack.

In particular, the two or more drive pins are drivably connected to one or more second drive shafts through one or more second worm gear units. This enables uniform and reliable driving of the driving pins and a subsequent uniform coating process of one or more components.

Each second worm gear unit includes one second worm disposed on the second drive shaft and one second worm gear disposed on the rotation axis of each drive pin, and the second worm drives the second worm gear. do. In this case, the rotation axis of the drive pin corresponds to its longitudinal axis.

The longitudinal axes of the two or more drive pins, which are preferably arranged on one common first transverse brace, are arranged in one horizontal plane E.

As a result, the annular component attached on the two drive pins ensures a uniform support and grip, which can again be improved through optional auxiliary pins.

When a galvanic coating layer is to be formed, the part to be coated must be supplied with electric current, so electrical contact of the part is necessary for this. For this purpose, at least two drive pins and at least one first transverse brace are made of metal and are connected to at least one current bus, according to what has proven suitable. Additionally, optionally, auxiliary pins and one or more second transverse braces may also be made of metal and connected to one or more current buses. As a result, components in direct contact with the drive pins and, optionally, the auxiliary pins can be electrically contacted and galvanically coated.

As long as chemical vapor deposition in an electrolyte bath (without external current) is carried out, no electrical contact of the drive pins or additional parts of the rack is necessary.

In order to be able to coat parts of different external dimensions using the rack according to the invention, it has been proven to be advantageous for the positions of the two drive units to be supported together with the second transverse brace and the first transverse brace. It can be adjusted relative to the frame and the first drive unit(s). In this way, for example bearing rings or cages of rolling bearings with different outer diameters can be held in one rack.

In order to prevent coating of the rack itself, those parts of the rack which are not to be formed of metal and therefore electrically conductive for the purpose of carrying currents, are coated with a particularly electrically insulating protective lacquer or protective coating layer. The protective coating layer preferably comprises a surface that is formed to be repellant with respect to the electrolyte bath, for example via a dirt and liquid repellent lotus coating, or hydrophobic, and otherwise electrically insulating.

Preferably, at least four pairs of driving pins are provided per first transverse brace, each pair of driving pins being configured to receive one annular component. However, the number of drive pin pairs is not limited. In particular, more than 16 drive pin pairs are provided per rack.

The problem of the present invention is solved by means of a method for chemical coating or galvanic coating of annular components, in particular bearing rings or cages of rolling or sliding bearings, in an electrolyte bath, comprising the following steps.

- providing at least one rack according to the invention;

- seating one or more annular parts on each of two driving pins of one or more racks in such a way that the outer diameter of the annular part rests on horizontally arranged driving pins;

- Driving one or more first driving units using one or more driving motors, driving one or more second driving units using one or more first driving units, and driving driving pins using one or more second driving units. However, the annular part is converted into a rotation state about its central axis;

- introducing one or more racks into one or more electrolyte baths; and

- Laminating a chemical coating layer or galvanic coating layer on the annular part.

The method of the invention enables continuous rotational driving of the annular component to be coated using drive pins by using the rack of the invention. As a result, the component can be moved evenly and continuously in the electrolyte bath, thereby ensuring a particularly uniform layer thickness and no layer defects.

In this case, the step of introducing the racks into one electrolyte bath or into a plurality of electrolyte baths in sequence, or, if appropriate, also into a wash bath, may be carried out before or after the annular parts are brought into a state of rotation about their central axis. You can. In this case, it is preferable to put the parts into rotation already before inserting the rack into the electrolyte bath, in order to prevent the formation of contact traces in the first place. When transferring the rack from one electrolyte bath or wash bath to a further electrolyte bath or wash bath, the rotation of the parts is preferably maintained.

In particular, annular parts with an outer diameter ranging from 10 to 300 cm are coated. In this case, bearing rings or cages of rolling or sliding bearings are preferred, especially as annular components.

Preferably, for the formation of the galvanic coating layer, the two or more driving pins and the one or more first transverse braces are formed of metal and are supplied with current in electrical contact via one or more current buses.

1 to 10 the rack according to the invention and the method according to the invention are explained by way of example.
1 is a three-dimensional front view of a first rack.
Figure 2 is a schematic side view of the rack of Figure 1;
Figure 3 is a rear view of the rack of Figure 1.
Figure 4 is a three-dimensional front view of the second rack.
Figure 5 is an enlarged view of the second rack according to Figure 4.
Figure 6 is another enlarged view of the second rack according to Figure 4.
Figure 7 is a schematic diagram of the second rack according to Figure 6;
Figure 8 is a further enlarged view of the second rack according to Figure 6.
Figure 9 is a front view of the support frame of the second rack including the first drive unit.
Figure 10 is a rear view of the support frame of the second rack according to Figure 9 comprising a first drive unit;

Like reference numerals in Figures 1 to 10 indicate like elements.

1 shows a three-dimensional front view of a first rack 1 for receiving annular parts 2, here in the form of bearing rings, and for chemical or galvanic coating of the parts 2 in an electrolyte bath. It is shown. The first rack 1 includes one support frame 1a; One first drive unit (3); and four second drive units (4); and one first transverse brace (5) arranged horizontally for each second drive unit (4). In addition, the first rack 1 also includes a drive motor 6 for driving the first drive unit 3, and the first drive unit 3 drives four second drive units 4. is connected to them. In addition, the first racks 1, for each first transverse brace 5, are arranged on the first transverse braces 5 and can be rotated about their longitudinal axis L (see Fig. 2). It also includes a plurality of pairs of drive pins 8a, 8b, arranged horizontally and capable of receiving the annular parts 2, each pair of drive pins 8a, 8b being connected to one second drive unit 4. ) is connected to it in such a way that it can be driven by . The first drive unit 3 is formed through a belt drive including one belt 3b and a plurality of deflection rollers 3c, and each second drive unit 4 has a horizontally arranged second drive shaft. (4a), and the drive motor 6 is connected to the second drive shafts 4a through a belt drive. In this case, the motor drive pulley 6a of the drive motor 6 drives the belt 3b, which drives the deflection rollers 3c and the second drive shafts 4a. Parallel to each second drive shaft 4a a second transverse brace 9 is arranged, this second transverse brace comprising one horizontally arranged auxiliary pin 10 . The auxiliary pin is optionally mounted rotatably about its longitudinal axis L1 (see Figure 2). The drive pins 8a and 8b are drivably connected to one second drive shaft 4a through one second worm gear unit 7'.

The longitudinal axes L of the two drive pins 8a, 8b arranged on one common first transverse brace 5 are arranged in one horizontal plane E (see Fig. 7). The two drive pins 8a, 8b and the first transverse brace 5, and optionally the auxiliary pins 10 and the second transverse braces 9, are made of metal and are connected to the current bus 11. connected. Here, a total of 16 pairs of driving pins 8a, 8b are provided, and 16 annular parts 2 are driven by these driving pins.

The method for chemical or galvanic coating of annular parts 2, here bearing rings, comprises the following steps.

Providing a rack (1), two driving pins (8a, 8b) of the rack (1) in such a way that the outer diameter of the annular parts (2) rests on the horizontally arranged driving pins (8a, 8b). ) Seating the annular parts (2) on. The first driving unit 3 is driven using the driving motor 6, but the second driving units 4 are driven by the first driving unit 3, and the driving pins 8a and 8b are driven by the first driving unit 3. 2 to be driven by the driving units (4). The annular component 2 is switched to a state of rotation about its central axis 2a. In this case, the step of introducing the rack 1 into the electrolyte bath, not shown, may be performed before or after the parts 2 are switched to the rotating state. Now the step of laminating the chemical coating layer or the galvanic coating layer on the annular components 2 is carried out under conditions of continuous rotation of the components 2 in the electrolyte bath.

In Figure 2, a schematic side view of the rack 1 of Figure 1 is shown. In this figure, the central axis 2a of the annular part 2 is identified, around which the part 2 rotates when the driving pins 8a, 8b on which the part 2 is disposed are driven.

In Figure 3, a rear view of the rack 1 of Figure 1 is shown. In this drawing, it is confirmed that four worms (7a') of the second worm gear unit (7') are disposed on the second drive shafts (4a), where the four worms each have two worm gears (7b'). ), and these worm gears themselves rotate the driving pins (8a, 8b).

4 shows a three-dimensional front view of a second rack 1' comprising one first drive unit with one first drive shaft 3a. The gray parts of the second rack 1' are coated with an electrically insulating protective lacquer, while the silvery parts are uncoated and conductive, so that galvanic deposition can be carried out on the components 2. do. Current supply lines 11a supply current to the driving pins 8a and 8b.

The method for chemical or galvanic coating of annular parts 2, here bearing rings, comprises the following steps.

Providing a rack 1', the outer diameter of the annular parts 2 is provided with two driving pins 8a, 8b respectively of the rack 1' in such a way that they rest on horizontally arranged driving pins 8a, 8b. 8b) Seating the annular parts (2) on. The first drive shaft 3a is driven using the drive motor 6, but the second drive units 4 are driven by the first drive shaft 3a and the drive pins 8a and 8b are driven by the second drive shaft 3a. causing it to be driven by drive units (4). The annular part 2 is put into a state of rotation about its central axis 2a (see Figure 2). The step of introducing the rack 1' into the electrolyte bath, not shown, is performed after the components 2 are switched to the rotating state. Now the step of laminating the chemical coating layer or the galvanic coating layer on the annular component 2 is carried out under conditions of continuous rotation of the component 2 in the electrolyte bath.

In Figure 5, an enlarged view of the second rack 1' according to Figure 4 is shown.

In Figure 6, another enlarged view of the second rack 1' according to Figure 4 is shown.

In FIG. 7 a schematic diagram of the second rack 1' according to FIG. 6 is shown. The first drive unit comprises one first drive shaft 3a (see FIGS. 9 and 10 ), which here is arranged vertically. Each second drive unit 4 includes one horizontally arranged second drive shaft 4a, which is connected to the first worm gear units 7 (FIGS. 9 and 10 It is drivably connected to the first drive shaft 3a through (reference). The drive motor 6 (see FIGS. 9 and 10 ) is configured to drive the first drive shaft 3a.

The longitudinal axes L of the pairs of drive pins 8a, 8b arranged on one common first transverse brace 5 are arranged in one horizontal plane E. Parallel to each second drive shaft 4a a second transverse brace 9 is arranged, this second transverse brace comprising an auxiliary pin 10 arranged horizontally. The auxiliary pin is optionally mounted rotatably about its longitudinal axis L1 (see Figure 2). The drive pins 8a, 8b are drivably connected to one of the second drive shafts 4a via one second worm gear unit 7' (see Figure 3).

In figure 8 a further enlarged view of the second rack 1' according to figure 6 is shown, in which the annular part 2 is pushed straight onto the drive pins 8a, 8b but still on the drive pin 8a. ) do not come into contact with

9 shows a front view of the support frame 1a of the second rack 1' comprising the first drive unit 3. The first drive unit 3 includes a first drive shaft 3a that is arranged vertically. Four second drive units, each comprising a horizontally arranged second drive shaft 4a, are driven from the first drive shaft 3a via four first worm gear units 7, each of the first drive shafts 4a The worm gear unit 7 includes one worm 7a disposed on the first drive shaft 3a and one worm gear 7b disposed on one of the second drive shafts 4a.

In FIG. 10 , a rear view of the support frame 1a of the second rack 1 ′ according to FIG. 9 including the first drive unit 3 is shown.

1, 1': Rack
1a: support frame
2: Annular part
2a: central axis
3: first drive unit
3a: first drive shaft
3b: belt
3c: Deflection roller
4: second drive unit
4a: second drive shaft
5: First transverse brace
6: Drive motor
6a: Drive motor pulley
7, 7': Worm gear unit
7a, 7a': worm
7b, 7b': worm gear
8a, 8b: drive pins
9: Second transverse brace
10: Auxiliary pin
11: current bus
11a: current supply line
L, L1: longitudinal axis
E: horizontal plane

Claims (10)

Rack (1, 1') for receiving annular parts (2) and for chemical or galvanic coating of the parts (2) in an electrolyte bath,
- a support frame (1a) with at least one first drive unit (3), at least one second drive unit (4) and at least one first transverse brace (5) arranged horizontally;
- one or more drive motors (6) for driving one or more first drive units (3), wherein the one or more first drive units (3) are connected to one or more second drive units (4) in such a way that they drive them. the driving motor; and
- In the rack comprising two or more driving pins (8a, 8b) arranged horizontally, each having a longitudinal axis (L),
The drive pins 8a, 8b are configured to receive one of the annular parts 2, the drive pins 8a, 8b are each rotatable about their longitudinal axis L, and the drive pins 8a, 8b are respectively rotatable about their longitudinal axis L. 8b) is arranged on at least one first transverse brace 5, wherein the two or more driving pins 8a, 8b are configured to rotate the driving pins 8a, 8b about their longitudinal axes L. A rack connected to one or more second drive units (4) for driving. The method according to claim 1, wherein the at least one first drive unit (3) comprises at least one first drive shaft (3a) arranged vertically and the at least one second drive unit (4) comprises at least one first drive shaft (3a) arranged horizontally. 2 comprising a drive shaft (4a), wherein the one or more second drive shafts (4a) are driveably connected to the one or more first drive shafts (3a) via one or more first worm gear units (7), and the one or more driving shafts (4a) Rack, wherein the motor (6) is provided for driving one or more first drive shafts (3a). The method according to claim 1, wherein the first drive unit (3) is formed via a belt drive and the at least one second drive unit (4) comprises at least one second drive shaft (4a) arranged horizontally, Rack, wherein a drive motor (6) is connected to one or more second drive shafts (4a) via the belt drive. 4. The method according to claim 2 or 3, wherein one second transverse brace (9) is arranged parallel to each second drive shaft (4a), the second transverse brace being arranged horizontally and optionally A rack comprising one or more auxiliary pins (10) that can be rotated about their longitudinal axis (L1). Rack according to claim 2 or 3, wherein the two or more drive pins (8a, 8b) are drivably connected with one or more second drive shafts (4a) via one or more second worm gear units (7'). . 4. The method according to any one of claims 1 to 3, wherein the longitudinal axes (L) of two or more drive pins (8a, 8b) arranged on one common first transverse brace (5) are aligned in one horizontal A rack placed within a plane (E). 5. The device according to claim 4, comprising at least two drive pins (8a, 8b) and at least one first transverse brace (5), and optionally also auxiliary pins (10) and at least one second transverse brace (9). ) is a rack formed of metal and connected to one or more current buses (11). 4. The method according to any one of claims 1 to 3, wherein each first transverse brace (5) is provided with at least four pairs of driving pins (8a, 8b), each pair of driving pins (8a, 8b) A rack configured to receive one annular part (2). A method for chemical or galvanic coating of annular parts (2) in an electrolyte bath, comprising:
- providing at least one rack (1, 1') according to any one of claims 1 to 3;
- two driving pins 8a, 8 respectively of one or more racks 1, 1' in such a way that the annular part 2 is seated, in the area of its outer diameter, on the horizontally arranged driving pins 8a, 8b. 8b) seating at least one annular part (2) on it;
- Driving one or more first drive units (3) using one or more drive motors (6), and driving one or more second drive units (4) using one or more first drive units (3); Driving the driving pins (8a, 8b) using the above second driving unit (4), wherein the annular part (2) is converted into a rotation state about its central axis (2a);
- introducing one or more racks (1, 1') into one or more electrolyte baths; and
- Laminating a chemical coating layer or a galvanic coating layer on the annular component (2). 10. The method according to claim 9, wherein the at least two drive pins (8a, 8b) and the at least one first transverse brace (5) are made of metal and are in electrical contact via at least one current bus (11) for the formation of a galvanic coating layer. A coating method in which current is supplied.

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