KR20180090278A - Rack for accommodating annular parts, and method - Google Patents

Abstract

The invention relates to a rack for the chemical coating or galvanic coating of parts in the electrolyte bath, for the reception of annular parts, in particular bearing rings or cages of rolling bearings or sliding bearings, A support frame having a drive unit, at least one second drive unit, and at least one horizontally disposed first lateral brace; At least one drive motor for driving at least one first drive unit, the at least one first drive unit comprising: a drive motor connected to the at least one second drive unit in such a manner as to drive at least one second drive unit; Two or more drive pins disposed on the at least one first transverse brace and rotatable about their longitudinal axis and horizontally disposed for receiving the annular components, Said drive pin being connected thereto in such a way that it can be driven by said drive pin; . The invention also relates to a method for chemical coating or galvanic coating of annular parts.

Description

Rack for accommodating annular parts, and method

The present invention relates to a bearing for bearing rings or cages of annular parts, in particular rolling bearings or sliding bearings, and for the chemical coating or galvanic coating of parts in an electrolyte bath, lt; / RTI > rack. The invention also relates to a method for the chemical coating or galvanic coating of annular parts, in particular bearing rings or cages of rolling bearings or sliding bearings, in an electrolyte bath.

Already, racks for chemical coating or galvanic coating of components in an electrolyte bath are known, in which the parts to be coated are deposited on the rack, particularly clamped. In this case, the part is fixed on the rack, and the rack is introduced into the different electrolyte baths for stacking chemical coatings or galvanic coating layers by a crane. In this case, the disadvantage is that, in the region of the contact positions between the part and the rack after coating, the layer defects due to non-uniform layer thicknesses in the formed coating layer, contact marks, and / It can be confirmed.

A tilting rack is also known in which parts are moved in the electrolyte bath through tilting during coating. As a result, layer defects ascertainable in the area of the contact positions between the part and the rack after coating are reduced, but not completely prevented.

Both known methods are used particularly for parts with large external dimensions ranging from 10 to 300 cm.

It is therefore an object of the present invention to provide a rack and a method for coating of annular parts, in which the quality of the coating layer formed is clearly improved.

The object is achieved in the case of a rack for the reception of annular parts, in particular bearing rings or cages of rolling bearings or sliding bearings, and for chemical coating or galvanic coating of parts in an electrolyte bath,

A support frame having at least one first drive unit, at least one second drive unit, and at least one horizontally disposed first transverse bracing;

At least one drive motor for driving at least one first drive unit, the at least one first drive unit being connected thereto in a manner driving at least one second drive unit; And

Two or more drive pins disposed on one or more first transverse braces and rotatable about their longitudinal axis and horizontally disposed for receiving the annular components, two or more drive pins The drive pin being connected thereto in such a way that it can be driven by the second drive unit described above.

The racks of the present invention enable the continuous rotational drive of the to-be-coated annular component using drive pins. As a result, the parts can be moved uniformly and continuously in the electrolyte bath, so that a particularly uniform layer thickness is formed and no layer defects are formed at all.

Preferably, the at least one first drive unit includes at least one first drive shaft disposed vertically, the at least one second drive unit includes at least one second drive shaft disposed horizontally, and at least one second drive shaft Is operably connected to at least one first drive shaft via at least one first worm gear unit and at least one drive motor is provided for driving one or more first drive shafts.

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

Alternatively, the first drive unit may be formed through a belt drive, the at least one second drive unit may include one or more drive shafts disposed horizontally, and one or more drive motors may be coupled to one or more second drive shafts Lt; / RTI >

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

In this case, it has been proved to be suitable that one second transverse brace is arranged parallel to each second drive shaft, the second transverse brace comprising one or more horizontally disposed auxiliary pins ). The auxiliary pin may be fixedly formed or may be rotatable about its own longitudinal axis. The ancillary pin allows for improved and non-destructive gripping of each annular component on the rack.

In particular, two or more drive pins are driveably connected to one or more second drive shafts via one or more second worm gear units. This enables a uniform and reliable drive of the drive pins and therefore a uniform coating process of one or more parts.

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

Preferably, the longitudinal axes of the two or more drive pins disposed on one common first transverse brace are disposed in one horizontal plane (E).

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

If a galvanic coating layer is to be formed, the part to be coated must be supplied with electric current, which requires electrical contact of the part. To this end, according to proven to be suitable, at least the two or more drive pins and the at least one first transverse brace are formed of metal and are connected to one or more current buses. Alternatively, the auxiliary pins and the at least one second lateral brace may also be formed of metal and connected to one or more current buses. As a result, the drive pins and, optionally, the parts in direct contact with the auxiliary pins can be electrically contacted and galvanically coated.

As long as chemical vapor deposition (without external current) is performed in the electrolyte bath, electrical contact of the drive pins or additional parts of the rack is not required.

In order to enable the use of a rack according to the invention to coat parts of different external dimensions, according to a proven point of preference, the positions of the two drive units are supported with a second transverse brace and a first transverse brace Relative to the frame and the first drive unit (s). In this way, for example, the bearing wheels or cages of rolling bearings with different outer diameters can be held in one rack.

To prevent coating of the rack itself, parts of the rack which are to be formed of metal and therefore not electrically conductive for current carrying are coated with an electrically insulating protective lacquer or protective coating layer. The protective coating layer preferably includes a surface that is repellent in association with the electrolyte bath, for example, through a soil and liquid repellant lotus coating, or hydrophobically, and otherwise electrically insulating.

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

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

- providing at least one rack according to the invention;

Placing at least one annular part on each of the two drive pins of the at least one rack in such a manner that the outer diameter of the annular part is seated on the horizontally disposed drive pins;

- driving one or more first drive units using one or more drive motors, driving one or more second drive units using one or more first drive units, driving the drive pins using one or more second drive units The annular part being converted into a rotational state about its own central axis;

Introducing one or more racks into one or more electrolyte baths; And

Laminating a chemical coating layer or a galvanic coating layer on the annular part;

The method of the present invention enables continuous rotational drive of the to-be-coated annular part using drive pins by using the rack of the present invention. As a result, the parts can be moved uniformly and continuously in the electrolyte bath, so that a particularly uniform layer thickness is formed and no layer defects are formed at all.

In this case, the step of introducing the rack into one electrolyte bath or, in turn, a plurality of electrolyte baths, and optionally also the cleansing bath, may be performed before or after the annular components are converted into a rotational state centered about their central axis . In this case, it is preferred to switch the parts into a rotating state before inserting the rack into the electrolyte bath, in order to prevent the formation of contact marks from the beginning. When the rack is moved from the one-side electrolyte bath or the cleansing bath to the additional electrolyte bath or cleansing bath, rotation of the components is preferably maintained.

Particularly, annular parts having an outer diameter in the range of 10 to 300 cm are coated. In this case, bearing rings or cages of rolling bearings or sliding bearings are particularly preferred as annular components.

Preferably, for the formation of a galvanic coating layer, the two or more drive pins and the at least one first transverse brace are formed of a metal and are in electrical contact and supplied with current through one or more current buses.

1 to 10, a rack according to the present invention and a method according to the present invention are illustrated 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;
3 is a rear view of the rack of Fig.
4 is a three dimensional front view of the second rack;
5 is an enlarged view of the second rack according to Fig.
Figure 6 is another enlarged view of the second rack according to Figure 4;
7 is a schematic view of a second rack according to Fig.
FIG. 8 is an enlarged view of the second rack according to FIG. 6 further enlarged; FIG.
9 is a front view of the support frame of the second rack including the first drive unit.
10 is a rear view of the support frame of the second rack according to Fig. 9 including the first drive unit.

The same reference numerals in Figs. 1 to 10 denote the same elements.

1 shows a three dimensional front view of a first rack 1 for the reception of annular parts 2 in the form of bearing rings and for the chemical coating or galvanic coating of parts 2 in an electrolyte bath Respectively. The first rack (1) has one support frame (1a); One first drive unit (3); And four second drive units (4); And one first transverse brace (5) horizontally arranged for each second drive unit (4). The first rack 1 also includes a drive motor 6 for driving the first drive unit 3 and the first drive unit 3 includes a mechanism for driving the four second drive units 4 They are connected with them. In addition, the first rack 1 is arranged for each first lateral brace 5 on these first lateral braces 5 and rotates about their longitudinal axis L (see Fig. 2) And a plurality of pairs of drive pins 8a and 8b for accommodating the annular components 2 are disposed horizontally and horizontally so that the pair of drive pins 8a and 8b are respectively connected to one second drive unit 4 Lt; / RTI > in a manner that can be driven by a motor. 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 is connected to a 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. A second transverse brace 9 is disposed parallel to each second drive shaft 4a, and the second transverse brace includes one auxiliary pin 10 disposed horizontally. The auxiliary pin is optionally mounted rotatably about its longitudinal axis L1 (see FIG. 2). The drive pins 8a and 8b are driveably connected to one second drive shaft 4a through one second worm gear unit 7 '.

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

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

8b of the rack 1 in such a manner that the outer diameter of the annular parts 2 is mounted on horizontally arranged drive pins 8a, ) Of the annular components (2). The first drive unit 3 is driven by the drive motor 6 while the second drive units 4 are driven by the first drive unit 3 and the drive pins 8a and 8b are driven by the first drive unit 3, 2 drive units (4). The annular part 2 is switched to the rotating state around its center 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. The step of laminating the chemical coating layer or the galvanic coating layer on the annular parts 2 is now performed under the condition that the part 2 is continuously rotated in the electrolyte bath.

Figure 2 shows a schematic side view of the rack 1 of Figure 1. In this figure, the central axis 2a of the annular part 2, which is the center of rotation of the part 2, is identified when the drive pins 8a, 8b on which the part 2 is disposed are driven.

Fig. 3 shows a rear view of the rack 1 of Fig. In this figure, it is confirmed that four worms 7a 'of the second worm gear unit 7' are arranged on the second driving shafts 4a, wherein the four worms are respectively provided with two worm gears 7b ' , And these worm gears themselves drive the drive pins 8a and 8b in rotation.

Fig. 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 portions of the second rack 1 'are coated with an electrically insulating protective lacquer, of which the silvered portions are uncoated and energized so that galvanic deposition can be carried out on the parts 2 do. The current supply lines 11a supply current to the drive pins 8a and 8b.

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

8b of the rack 1 'in such a manner that the outer diameter of the annular parts 2 is mounted on the horizontally arranged drive pins 8a, 8b by providing the rack 1' 8b) of the annular parts (2). The first drive shaft 3a is driven by the drive motor 6 while 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. To be driven by the drive units (4). The annular part 2 is switched to the rotating state around its center axis 2a (see Fig. 2). The step of introducing the rack 1 'into the electrolytic bath not shown is performed after the parts 2 are switched to the rotating state. The step of laminating the chemical coating layer or the galvanic coating layer on the annular part 2 is now carried out under the condition that the part 2 continuously rotates in the electrolyte bath.

Fig. 5 shows an enlarged view of the second rack 1 'according to Fig.

Fig. 6 shows another enlarged view of the second rack 1 'according to Fig.

Fig. 7 shows a schematic view of the second rack 1 'according to Fig. The first drive unit includes one first drive shaft 3a (see Figs. 9 and 10) arranged vertically here. Each of the second drive units 4 includes one horizontally disposed second drive shaft 4a and the second drive shafts 4a comprise first worm gear units 7 (See Fig. 3). 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 disposed on one common first lateral brace 5 are arranged in one horizontal plane E. One second transverse brace 9 is arranged parallel to each second drive shaft 4a, and this second transverse brace comprises one auxiliary pin 10 arranged horizontally. The auxiliary pin is optionally mounted rotatably about its longitudinal axis L1 (see FIG. 2). The drive pins 8a and 8b are driveably connected to one of the second drive shafts 4a through one second worm gear unit 7 '(see FIG. 3).

8 shows a further enlarged view of the second rack 1 'according to Fig. 6, in which the annular part 2 is pushed onto the drive pins 8a, 8b, ).

Fig. 9 shows a front view of the support frame 1a of the second rack 1 'including the first drive unit 3. As shown in Fig. The first drive unit 3 includes a first drive shaft 3a disposed vertically. Four second drive units each including one second drive shaft 4a disposed horizontally are driven from the first drive shaft 3a through four first worm gear units 7, 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.

Fig. 10 shows a rear view of the support frame 1a of the second rack 1 'according to Fig. 9 including the first drive unit 3. Fig.

1, 1 ': Rack
1a: support frame
2: annular part
2a: central axis
3: first driving unit
3a: a first drive shaft
3b: belt
3c: deflection roller
4: second drive unit
4a: a second drive shaft
5: first transverse brace
6: Driving motor
6a: drive motor pulley
7, 7 ': Worm gear unit
7a, 7a ': Worm
7b, 7b ': Worm gear
8a, 8b: drive pin
9: second transverse brace
10: Auxiliary pin
11: Current bus
11a: current supply line
L, L1:
E: horizontal plane

Claims (10)

As a rack (1, 1 ') for the acceptance of annular parts (2), in particular bearing rings or cages of rolling bearings or sliding bearings, and for chemical coating or galvanic coating of parts (2) in an electrolyte bath,
- a support frame (1a) having at least one first drive unit (3), at least one second drive unit (4), and at least one horizontally arranged first lateral brace (5);
One or more drive motors (6) for driving one or more first drive units (3), one or more first drive units (3) are connected in a manner that drives one or more second drive units The drive motor; And
- two or more drive pins (8a, 8b) horizontally disposed with respective longitudinal axes (L)
The drive pins 8a and 8b are configured to receive one of the annular components 2 and the drive pins 8a and 8b may each be rotated about their longitudinal axis L and the drive pins 8a, 8b are disposed on the at least one first transverse brace 5 and the two or more drive pins 8a, 8b are arranged such that the rotation of the drive pins 8a, 8b about their longitudinal axes L, And connected to the at least one second drive unit (4) for driving. 2. The apparatus according to claim 1, wherein the at least one first drive unit (3) comprises at least one first drive shaft (3a) arranged vertically and at least one second drive unit (4) One or more second drive shafts 4a are driveably connected to one or more first drive shafts 3a via one or more first worm gear units 7, The motor (6) is provided for driving one or more first drive shafts (3a). 2. The apparatus according to claim 1, wherein the first drive unit (3) is formed through a belt drive and the at least one second drive unit (4) comprises at least one second drive shaft (4a) The drive motor (6) is connected to the at least one second drive shaft (4a) through the belt drive. 4. A machine according to claim 2 or 3, characterized in that one second transverse brace (9) is arranged parallel to each second drive shaft (4a), said second transverse brace (10) which can be rotated about its own longitudinal axis (L1). 5. A drive device according to any one of claims 2 to 4, wherein the two or more drive pins (8a, 8b) are driveable with one or more second drive shafts (4a) through one or more second worm gear units (7 ' Connected, rack. 6. Device according to any one of the preceding claims, characterized in that the longitudinal axes (L) of two or more drive pins (8a, 8b) arranged on one common first lateral brace (5) A rack, disposed within a plane (E). 7. A device according to any one of the preceding claims, characterized in that it comprises at least two drive pins (8a, 8b) and at least one first lateral brace (5), optionally also auxiliary pins (10) Wherein said second transverse brace (9) is formed of a metal and is connected to one or more current buses (11). 8. Device according to any one of claims 1 to 7, characterized in that at least four pairs of drive pins (8a, 8b) are provided for each first lateral brace (5), each pair of drive pins (8a, 8b) Is configured to receive one annular part (2). A method for the chemical coating or galvanic coating of annular parts (2), in particular bearing rings or cages of rolling bearings or sliding bearings, in an electrolyte bath,
- providing at least one rack (1, 1 ') according to one of the claims 1 to 8;
The two drive pins 8a and 8b of the one or more racks 1 and 1 'are arranged in such a manner that the annular part 2 is seated on the horizontally disposed drive pins 8a and 8b in the region of its outer diameter, 8b) of the at least one annular part (2);
- driving one or more first drive units (3) using one or more drive motors (6), driving one or more second drive units (4) using one or more first drive units (3) Driving the drive pins 8a and 8b using the second drive unit 4 so that the annular part 2 is switched to a rotational state around its center 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 part (2). 10. A method according to claim 9, wherein at least two drive pins (8a, 8b) and at least one first lateral brace (5) are formed of metal for the formation of a galvanic coating layer, And a current is supplied thereto.

Images