CA1046267A - Machine for spray coating irregular shapes - Google Patents
Machine for spray coating irregular shapesInfo
- Publication number
- CA1046267A CA1046267A CA230,032A CA230032A CA1046267A CA 1046267 A CA1046267 A CA 1046267A CA 230032 A CA230032 A CA 230032A CA 1046267 A CA1046267 A CA 1046267A
- Authority
- CA
- Canada
- Prior art keywords
- shape
- fixture
- coated
- spray device
- rotating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000005507 spraying Methods 0.000 title claims abstract description 21
- 230000001788 irregular Effects 0.000 title claims abstract description 14
- 239000007921 spray Substances 0.000 claims description 33
- 230000033001 locomotion Effects 0.000 claims description 29
- 238000000576 coating method Methods 0.000 claims description 16
- 239000011248 coating agent Substances 0.000 claims description 15
- 230000002596 correlated effect Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 2
- 230000004044 response Effects 0.000 claims description 2
- 230000008859 change Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 230000009291 secondary effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/06—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies
- B05B13/0645—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies the hollow bodies being rotated during treatment operation
- B05B13/0663—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies the hollow bodies being rotated during treatment operation and the hollow bodies being translated in a direction parallel to the rotational axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
- B05B13/0426—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with spray heads moved along a closed path
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/06—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies
- B05B13/0645—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies the hollow bodies being rotated during treatment operation
- B05B13/0672—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies the hollow bodies being rotated during treatment operation and the inclination or the distance of a treating nozzle being modified relative to the rotation axis, e.g. for treating irregular internal surfaces
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
Abstract
MACHINE FOR SPRAY COATING IRREGULAR SHAPES
ABSTRACT OF THE INVENTIONS
A machine for spray coating a rotating irregular shape which moves a spray coating device in three paths to provide constant relative speed; standoff distance; and angular relationship between the spray coating device and surface of the shape to be coated.
S P E C I F I C A T I O N
ABSTRACT OF THE INVENTIONS
A machine for spray coating a rotating irregular shape which moves a spray coating device in three paths to provide constant relative speed; standoff distance; and angular relationship between the spray coating device and surface of the shape to be coated.
S P E C I F I C A T I O N
Description
~0~6Z67 This invention relates to a machine for spray coating substrates and more particularly to such a machine for coating irregular shapes whereby a coating of uniform thickness and quality is obtained.
When a round cylindrical part is to be coated by a spray process, such as the plasma spray process, the part is rotated on its own axis at constant speed, the spray device is positioned a fixed distance away and aimed so that the spray strikes the surface at about a 90 angle and the spray device is moved at a constant speed in a direction parallel to the axis of rotation of the part.
This simple arrangement provides the four conditions that are necessary for the application of a coating of uniform thickness and quality. These are: (1) constant speed of the part surface past the spray device, (2) constant dis-tance between the work surface and the spray device (stand-off), (3) constant angle (preferably 90) between the sur-face to be coated and the direction of travel of the spray particles (impingement angle) and, (4) constant rate of travel of the spray device in the part axis direction.
However, when the cylindrical part to be coated is not round, such as in the case of a rotary combustion engine housing, this arrangement fails to hoid constant the first three parameters above. It is therefore necessary to pro-vide some other motions.
In the past, variations in part surface speed, because of varying radii with the above arrangement, has ~,~
~ 2 - ~r~
93s7 10~6267 been partially compensated for by rotating at a speed that varied through some repetitive cycle during each revolution, The relatively large rotational mass of many parts of interest, combined with the high rotational acceleration required, resulted in the generation of very large inertial forces in the rotating mechanism, This made such equipment difficult to construct or resulted in rapid wear-out and high maintenance costs, If the variation in the part to spray device distance was also compensated for by moving the entire part relative to the spray device, then the above problem was compounded, Additionally, the angle of the spray device relative to the part surface was not held constant, but the spray device was held in a fixed position.
These existing devices were difficult to construct, difficult to maintain, and did not do a very good job of providing uniform coating thickness and quality.
The main object of this invention is to provide a machine that will produce uniform coating thicknesses on irregular shapes, Another object is to provide such a machine that i8 relatively easy to construct and maintain, Yet another object is to provide a machine for producing a uniform coating thickness on trochoid com-bustion engine housing using a plasma spray device, These and other objects will either be pointed out or become apparent from the following disclosure and 1 04 ~ 2 ~ 7 drawings wherein;
Figure 1 is a schematic drawing in elevation illustrating the principles of the invention;
Figure la is a side elevation partially in cross-sections of the apparatus shown in Figure l;
Figures 2a through f are diagrams of a trochoid housing in various positions during rotation, showing the angular relationship of the spraying device relative to the surface to be coated.
The above objects are achieved in a general way by rotating the part to be coated at a constant speed about its axis of symmetry (or an axis closest to being an axis of symmetry) and by compensating for variations in surface speed, standoff distances and impingement angle by moving the relatively light-weight spraying device. Variations in part surface speed are compensated for by moving the spray device parallel to the direction of surface motion either in the same direction or in the opposite direction as required. Variations in standoff are compensated for by moving the spray device in a radial direction. Varia-tions in impingement angle are compensated for by rotating the spraying device about an axis parallel to the part rotation axis In a more specific way, the objects are achieved by a machine for ~ spray coating~irregular shapes which includes in combination with a fixture for receiving irregu-lar ~hapes to be coated; means for rotating said fixture and shape about an axis in the z direction; and means for moving said fixture and shape linearly in the direction of the axis of rotation of the shape, a base; a support ~ystem mounted on the base and capable of providing movement in the X and Y direction; a spray device pivotally secured to said support system and located adjacent the shape to be coated so as to deposit coating material on the surface thereof and being movable in the X and Y direction rela-tive to the surface to be coated in response to movement of said support system; means correlated to the configura-tion of the shape for moving the support system in the X
and Y direction as said shape rotates, thereby maintaining a constant relative ~peed and a constant distance between the spray device and the surface of the rotating shape; a drive system attached to the spray device to provide arcuate movement of the spray device about the point where the spray device is secured to the support system; means correlated to the configuration of the shape for moving the drive sy~tem and thus the spray device so as to main-tain a substantially 90 degree angle of impingement betweenthe coating sprayed from the spray device and the surface of the shape to be coated.
Referring now to the drawings, a typical machine for practicing the invention is shown generally at M in Figure 1. The machine shown embodies the principal~ of the invention as they would be employed to construct a machine for coating trochoid engine housings H. The engine housing 1 0 4~ 2 ~ 7 H is subject to two motions. The first motion is rotatinal as designated by ~A~- The hou~ing iQ rotated at a constant angular velocity about an axis through point 0 which corresponds to the axi~ of the housing. The second motion is linear in the Z direction as indicated by the arrow in Fig. la 80 as to maintain a constant rate of travel past the spray device or torch D in this ca~e in the housing's axial direction.
To apply an even coating onto the surface of the engine housing, it is important to maintain a constant relative velocity between the torch D and the housing wall W. Since the housing H is rotating at a constant angular velocity, a change in the radius of the housing surface will result in a change of tangential velocity at the housing wall. This variation can be compensated by either moving the torch with or against the motion of the housing surface, i.e., as the radius of the housing in-creases, the tangential valocity increases and it is necessary to ve the torch in the direction of housing surface travel in order to reduce the relative speed. As the radius of the housing decreases, the tangential veloci-ty decreases and it is necessary to move the torch opposite the direction of housing surface travel in order to increase the relative speed. This is accomplished by means of cam C3 and Links Ll, L2, L3 and L4. By means of the four-bar linkage Ll, L2, L3 and L4 pivoted about Pl, cam C3 causes motion in link L4 which causes the torch to either move 1046Z~;7 with or again~t the direction of motion of the housing surface Thus, a constant surface speed is maintainable between the torch and the engine housing wall. Cam C3 makes two revolutions to one of the housing, since this housing has a two-fold symmetry.
It is desirable to maintain a constant distance between the no~zle N of the torch and the engine housing.
This distance is referred to as "standoff." It can be seen in the drawing that as the engine housing i9 rotated about point "0" standoff would increase from point "B" to point "A", if the torch remained in a fixed position. To com-pensate for the change in radius from Rl to R2 ("B" to "A"), torch is connected to a four-bar linkage (links Ll, L2, L3 and L4) p~voted about point Pl. Motion is produced in link Ll by means of cam Cl. The cam is so constructed as to maintain constant standoff. It should be noted that due to the two-fo~d symmetry of the engine hou~ing, the cam Cl makes two revolutions for a 3ingle revolution of the housing.
During the coating process, it i8 desirable to maintain a 90 impingement angle, i.e., the coating spray should strike the surface of the engine housing at an angle of 90. Figure 2 shows the desired relation of the center-lines of link~ Ll and L7 at six points during one-quarter of the trochoid's revolution about point "0". Angles ~1 through ~6 indicate the motion of link L7 during the ~ota-tion of the housing. The magnitude of these angles ~ 0462~7 increases from zero for ~1 to a maximum value near ~2 then decreases to a zero value for ~6 As the trochoid continues to revolve in the next quarter revolution, the value of the angles will be the same for each step of the sequence with the sequence being reversed and the torch inclination being on the opposite side of the center line.
Figure 1 shows that through the action of cam C2 link L5 pivots about point P3 causing motion in link L6 which in turn causes an angular displacement in link L7 which is pivoted about point P2. Thus, by the angular displacement of link L7, the 90 impingement angle can be maintained as the housing is rotated. It should also be noted that for two revolutions of cam C2 the engine housing makes only one revolution due to the two-fold symmetry of the housing.
It is important to note that the axis about which the torch is rotated (through point P2) must be coincident with the surface to be coated. It is important because this is the only relationship which will allow angular displacement of the torch centerline without causing the impingement point to move on the housing surface. By using this configuration, angular torch disposition can be plotted without giving consideration to secondary effects.
It is obvious that the motion produced by cam C3 in order to maintain constant surface speed, has a direct interaction with the angular torch position. If links L3 and Ls are exactly the same length, then cam C2 can be made the same shape as cam C3, and with proper synchronization 10462~7 there will be no angular motion of L7 relative to Ll. The angular motion then becomes a product of the deviations in the shape of cam C2 from that of cam C3. It is also obvious that the motions described are not perfectly linPar but, in fact, curve linear. ~f the lengths of the various linkage members are chosen sufficiently long, the motions can be treated as linear.
While the invention has been described with reference to certain preferred embodiments, it should be understood that the principles of the invention can be applied to various modifications without departing from the spirit and scope of the invention. For example, the spraying device could be any kind of metal spraying torch, i.e , electric or oxy-fuel gas flame. The part to be coated could be any irregular shape, for example, elypti-cal, egg shaped, etc. The support mechanism for moving the coating device could be typical machine cross slides together with a torch rotating device. The motions that are produced by cams could be produced by tape, computer or other electronically controlled moving device. The cams themselves need not be designed to make two revolutions for one revolution of the housing. Such design is used in the preferred embodiment for reasons of simplified construction It should be further understood that while in the embodiments shown and described the fixture and shape are provided with motion in the Z direction relative to the lO~Z~'7 base, the same effect can be obtained by moving the torch support system in the Z direction relative to the base.
When a round cylindrical part is to be coated by a spray process, such as the plasma spray process, the part is rotated on its own axis at constant speed, the spray device is positioned a fixed distance away and aimed so that the spray strikes the surface at about a 90 angle and the spray device is moved at a constant speed in a direction parallel to the axis of rotation of the part.
This simple arrangement provides the four conditions that are necessary for the application of a coating of uniform thickness and quality. These are: (1) constant speed of the part surface past the spray device, (2) constant dis-tance between the work surface and the spray device (stand-off), (3) constant angle (preferably 90) between the sur-face to be coated and the direction of travel of the spray particles (impingement angle) and, (4) constant rate of travel of the spray device in the part axis direction.
However, when the cylindrical part to be coated is not round, such as in the case of a rotary combustion engine housing, this arrangement fails to hoid constant the first three parameters above. It is therefore necessary to pro-vide some other motions.
In the past, variations in part surface speed, because of varying radii with the above arrangement, has ~,~
~ 2 - ~r~
93s7 10~6267 been partially compensated for by rotating at a speed that varied through some repetitive cycle during each revolution, The relatively large rotational mass of many parts of interest, combined with the high rotational acceleration required, resulted in the generation of very large inertial forces in the rotating mechanism, This made such equipment difficult to construct or resulted in rapid wear-out and high maintenance costs, If the variation in the part to spray device distance was also compensated for by moving the entire part relative to the spray device, then the above problem was compounded, Additionally, the angle of the spray device relative to the part surface was not held constant, but the spray device was held in a fixed position.
These existing devices were difficult to construct, difficult to maintain, and did not do a very good job of providing uniform coating thickness and quality.
The main object of this invention is to provide a machine that will produce uniform coating thicknesses on irregular shapes, Another object is to provide such a machine that i8 relatively easy to construct and maintain, Yet another object is to provide a machine for producing a uniform coating thickness on trochoid com-bustion engine housing using a plasma spray device, These and other objects will either be pointed out or become apparent from the following disclosure and 1 04 ~ 2 ~ 7 drawings wherein;
Figure 1 is a schematic drawing in elevation illustrating the principles of the invention;
Figure la is a side elevation partially in cross-sections of the apparatus shown in Figure l;
Figures 2a through f are diagrams of a trochoid housing in various positions during rotation, showing the angular relationship of the spraying device relative to the surface to be coated.
The above objects are achieved in a general way by rotating the part to be coated at a constant speed about its axis of symmetry (or an axis closest to being an axis of symmetry) and by compensating for variations in surface speed, standoff distances and impingement angle by moving the relatively light-weight spraying device. Variations in part surface speed are compensated for by moving the spray device parallel to the direction of surface motion either in the same direction or in the opposite direction as required. Variations in standoff are compensated for by moving the spray device in a radial direction. Varia-tions in impingement angle are compensated for by rotating the spraying device about an axis parallel to the part rotation axis In a more specific way, the objects are achieved by a machine for ~ spray coating~irregular shapes which includes in combination with a fixture for receiving irregu-lar ~hapes to be coated; means for rotating said fixture and shape about an axis in the z direction; and means for moving said fixture and shape linearly in the direction of the axis of rotation of the shape, a base; a support ~ystem mounted on the base and capable of providing movement in the X and Y direction; a spray device pivotally secured to said support system and located adjacent the shape to be coated so as to deposit coating material on the surface thereof and being movable in the X and Y direction rela-tive to the surface to be coated in response to movement of said support system; means correlated to the configura-tion of the shape for moving the support system in the X
and Y direction as said shape rotates, thereby maintaining a constant relative ~peed and a constant distance between the spray device and the surface of the rotating shape; a drive system attached to the spray device to provide arcuate movement of the spray device about the point where the spray device is secured to the support system; means correlated to the configuration of the shape for moving the drive sy~tem and thus the spray device so as to main-tain a substantially 90 degree angle of impingement betweenthe coating sprayed from the spray device and the surface of the shape to be coated.
Referring now to the drawings, a typical machine for practicing the invention is shown generally at M in Figure 1. The machine shown embodies the principal~ of the invention as they would be employed to construct a machine for coating trochoid engine housings H. The engine housing 1 0 4~ 2 ~ 7 H is subject to two motions. The first motion is rotatinal as designated by ~A~- The hou~ing iQ rotated at a constant angular velocity about an axis through point 0 which corresponds to the axi~ of the housing. The second motion is linear in the Z direction as indicated by the arrow in Fig. la 80 as to maintain a constant rate of travel past the spray device or torch D in this ca~e in the housing's axial direction.
To apply an even coating onto the surface of the engine housing, it is important to maintain a constant relative velocity between the torch D and the housing wall W. Since the housing H is rotating at a constant angular velocity, a change in the radius of the housing surface will result in a change of tangential velocity at the housing wall. This variation can be compensated by either moving the torch with or against the motion of the housing surface, i.e., as the radius of the housing in-creases, the tangential valocity increases and it is necessary to ve the torch in the direction of housing surface travel in order to reduce the relative speed. As the radius of the housing decreases, the tangential veloci-ty decreases and it is necessary to move the torch opposite the direction of housing surface travel in order to increase the relative speed. This is accomplished by means of cam C3 and Links Ll, L2, L3 and L4. By means of the four-bar linkage Ll, L2, L3 and L4 pivoted about Pl, cam C3 causes motion in link L4 which causes the torch to either move 1046Z~;7 with or again~t the direction of motion of the housing surface Thus, a constant surface speed is maintainable between the torch and the engine housing wall. Cam C3 makes two revolutions to one of the housing, since this housing has a two-fold symmetry.
It is desirable to maintain a constant distance between the no~zle N of the torch and the engine housing.
This distance is referred to as "standoff." It can be seen in the drawing that as the engine housing i9 rotated about point "0" standoff would increase from point "B" to point "A", if the torch remained in a fixed position. To com-pensate for the change in radius from Rl to R2 ("B" to "A"), torch is connected to a four-bar linkage (links Ll, L2, L3 and L4) p~voted about point Pl. Motion is produced in link Ll by means of cam Cl. The cam is so constructed as to maintain constant standoff. It should be noted that due to the two-fo~d symmetry of the engine hou~ing, the cam Cl makes two revolutions for a 3ingle revolution of the housing.
During the coating process, it i8 desirable to maintain a 90 impingement angle, i.e., the coating spray should strike the surface of the engine housing at an angle of 90. Figure 2 shows the desired relation of the center-lines of link~ Ll and L7 at six points during one-quarter of the trochoid's revolution about point "0". Angles ~1 through ~6 indicate the motion of link L7 during the ~ota-tion of the housing. The magnitude of these angles ~ 0462~7 increases from zero for ~1 to a maximum value near ~2 then decreases to a zero value for ~6 As the trochoid continues to revolve in the next quarter revolution, the value of the angles will be the same for each step of the sequence with the sequence being reversed and the torch inclination being on the opposite side of the center line.
Figure 1 shows that through the action of cam C2 link L5 pivots about point P3 causing motion in link L6 which in turn causes an angular displacement in link L7 which is pivoted about point P2. Thus, by the angular displacement of link L7, the 90 impingement angle can be maintained as the housing is rotated. It should also be noted that for two revolutions of cam C2 the engine housing makes only one revolution due to the two-fold symmetry of the housing.
It is important to note that the axis about which the torch is rotated (through point P2) must be coincident with the surface to be coated. It is important because this is the only relationship which will allow angular displacement of the torch centerline without causing the impingement point to move on the housing surface. By using this configuration, angular torch disposition can be plotted without giving consideration to secondary effects.
It is obvious that the motion produced by cam C3 in order to maintain constant surface speed, has a direct interaction with the angular torch position. If links L3 and Ls are exactly the same length, then cam C2 can be made the same shape as cam C3, and with proper synchronization 10462~7 there will be no angular motion of L7 relative to Ll. The angular motion then becomes a product of the deviations in the shape of cam C2 from that of cam C3. It is also obvious that the motions described are not perfectly linPar but, in fact, curve linear. ~f the lengths of the various linkage members are chosen sufficiently long, the motions can be treated as linear.
While the invention has been described with reference to certain preferred embodiments, it should be understood that the principles of the invention can be applied to various modifications without departing from the spirit and scope of the invention. For example, the spraying device could be any kind of metal spraying torch, i.e , electric or oxy-fuel gas flame. The part to be coated could be any irregular shape, for example, elypti-cal, egg shaped, etc. The support mechanism for moving the coating device could be typical machine cross slides together with a torch rotating device. The motions that are produced by cams could be produced by tape, computer or other electronically controlled moving device. The cams themselves need not be designed to make two revolutions for one revolution of the housing. Such design is used in the preferred embodiment for reasons of simplified construction It should be further understood that while in the embodiments shown and described the fixture and shape are provided with motion in the Z direction relative to the lO~Z~'7 base, the same effect can be obtained by moving the torch support system in the Z direction relative to the base.
Claims (2)
1. A machine for spray coating of irregular shapes wherein relative motion is provided between said irregular shapes and said machine in the X, Y and Z
direction, comprising the combination of a fixture for receiving an irregular shape to be coated, means operatively related to said fixture for rotating said fixture and shape about an axis in the Z
direction and means operatively related to said fixture for moving said fixture and shape linearly in the direction of the axis of rotation of said shape;
with a base; a support system mounted on said base and capable of providing movement in the X and Y directions;
a spray device pivotally secured to said support system and located adjacent said shape to be coated so as to deposit coating material on the surface thereof and being movable in the X and Y direction relative to the surface to be coated in response to movement of said support system; means correlated to the configuration of said shape for moving the support system in the X and Y direction as said shape rotates thereby maintaining a constant relative speed and a constant distance between the spray device and the surface of said rotating shape, a drive system attached to said spray device to provide arcuate movement of said spray device about the pivotal point where said spray device is secured to said support system; means correlated to the configuration of said shape for moving said drive system and thus said spray device in an arcuate path so as to maintain a sub-stantially 90 degree angle of impingement between the coat-ing material sprayed from said spray device and the surface of the shape to be coated.
direction, comprising the combination of a fixture for receiving an irregular shape to be coated, means operatively related to said fixture for rotating said fixture and shape about an axis in the Z
direction and means operatively related to said fixture for moving said fixture and shape linearly in the direction of the axis of rotation of said shape;
with a base; a support system mounted on said base and capable of providing movement in the X and Y directions;
a spray device pivotally secured to said support system and located adjacent said shape to be coated so as to deposit coating material on the surface thereof and being movable in the X and Y direction relative to the surface to be coated in response to movement of said support system; means correlated to the configuration of said shape for moving the support system in the X and Y direction as said shape rotates thereby maintaining a constant relative speed and a constant distance between the spray device and the surface of said rotating shape, a drive system attached to said spray device to provide arcuate movement of said spray device about the pivotal point where said spray device is secured to said support system; means correlated to the configuration of said shape for moving said drive system and thus said spray device in an arcuate path so as to maintain a sub-stantially 90 degree angle of impingement between the coat-ing material sprayed from said spray device and the surface of the shape to be coated.
2. A machine for spray coating of irregular shapes wherein relative motion is provided between said irregular shapes and said machine in the X, Y and Z
directions, comprising in combination a fixture supporting the irregular shape to be coated; means operatively related to said fixture and for rotating said fixture and said shape and means operatively related to said fixture for moving said fixture and shape linearly in the direction of the axis of rotation said fixture, and a base, a four bar linkage pivotally mounted to said base with each of said four bars being pivoted to each other to form a parallelogram linkage, a metal spraying device pivotally mounted to said four bar linkage at a point diagonally opposite the point where said four bar linkage is pivotally mounted to said base and positioned relative to said fixture and shape so as to deposit coating material onto said shape, means associated with the four bar linkage and correlated to the shape to be coated for causing motion of said spray device relative to the ro-tational motion of said shape so as to maintain a constant relative speed between the spraying device and the rotating shape, means associated with the four bar linkage and corre-lated with the shape to be coated for moving said spraying device to and from the surface of said rotating shape to maintain a constant distance between said spraying device and the surface of said rotating shape regardless of changes in contour of said surface, a second linkage means pivotally mounted on said base and connected to said spraying device to cause angular motion of said spraying device relative to said rotating surface, means correlated with the shape to be coated and to the means for maintaining constant distance between the spraying device and surface for moving said second linkage means.
directions, comprising in combination a fixture supporting the irregular shape to be coated; means operatively related to said fixture and for rotating said fixture and said shape and means operatively related to said fixture for moving said fixture and shape linearly in the direction of the axis of rotation said fixture, and a base, a four bar linkage pivotally mounted to said base with each of said four bars being pivoted to each other to form a parallelogram linkage, a metal spraying device pivotally mounted to said four bar linkage at a point diagonally opposite the point where said four bar linkage is pivotally mounted to said base and positioned relative to said fixture and shape so as to deposit coating material onto said shape, means associated with the four bar linkage and correlated to the shape to be coated for causing motion of said spray device relative to the ro-tational motion of said shape so as to maintain a constant relative speed between the spraying device and the rotating shape, means associated with the four bar linkage and corre-lated with the shape to be coated for moving said spraying device to and from the surface of said rotating shape to maintain a constant distance between said spraying device and the surface of said rotating shape regardless of changes in contour of said surface, a second linkage means pivotally mounted on said base and connected to said spraying device to cause angular motion of said spraying device relative to said rotating surface, means correlated with the shape to be coated and to the means for maintaining constant distance between the spraying device and surface for moving said second linkage means.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US487191A US3915114A (en) | 1974-07-10 | 1974-07-10 | Machine for spray coating irregular shapes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1046267A true CA1046267A (en) | 1979-01-16 |
Family
ID=23934750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA230,032A Expired CA1046267A (en) | 1974-07-10 | 1975-06-24 | Machine for spray coating irregular shapes |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3915114A (en) |
| CA (1) | CA1046267A (en) |
| CH (1) | CH600957A5 (en) |
| DE (1) | DE7521238U (en) |
| FR (1) | FR2277626A1 (en) |
| GB (1) | GB1516323A (en) |
| SE (1) | SE427902B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4334495A (en) * | 1978-07-11 | 1982-06-15 | Trw Inc. | Method and apparatus for use in making an object |
| CH668010A5 (en) * | 1985-10-25 | 1988-11-30 | Siegfried Frei | DEVICE FOR APPLYING A POWDER COATING ON THE WELDED SEAM OF A CAN HULL. |
| US4866241A (en) * | 1988-03-30 | 1989-09-12 | Union Carbide Corporation | Plasma spray apparatus for coating irregular internal surfaces |
| US5314722A (en) * | 1989-06-29 | 1994-05-24 | Fanuc Ltd | Method of applying a material to a rotating object by using a robot |
| US6877972B2 (en) * | 2001-10-16 | 2005-04-12 | Lear Corporation | Spray urethane tool and system |
| DE102006056230B4 (en) * | 2006-11-29 | 2018-10-11 | Bayerische Motoren Werke Aktiengesellschaft | Device for internal coating of a hollow body |
| FR2944007B1 (en) | 2009-04-03 | 2012-06-08 | Sgd Sa | PROCESS FOR MANUFACTURING A GLASS CONTAINER AND CORRESPONDING CONTAINER. |
| FR2965491B1 (en) | 2010-10-05 | 2013-05-17 | Sgd Sa | COATING PROCESS AND CORRESPONDING COATING MACHINE |
| CN108818253A (en) * | 2018-06-15 | 2018-11-16 | 张弘历 | A kind of equipment for surface treatment |
| CN113070169B (en) * | 2021-04-19 | 2022-08-05 | 深圳市弘德胜自动化设备有限公司 | Electronic paper coating equipment |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3121024A (en) * | 1960-03-22 | 1964-02-11 | Gen Motors Corp | Electrostatic painting apparatus |
| US3596632A (en) * | 1968-12-31 | 1971-08-03 | Fownes Brothers & Co Inc | Adhesive applicator |
| BE759240A (en) * | 1970-02-14 | 1971-04-30 | Ransburg Gmbh | METHOD AND APPARATUS FOR COATING IRREGULAR SURFACES BY SPRAYING |
| US3802911A (en) * | 1971-01-28 | 1974-04-09 | Youngstown Sheet And Tube Co | Method for controlling the coating thickness of a coated metal strip |
-
1974
- 1974-07-10 US US487191A patent/US3915114A/en not_active Expired - Lifetime
-
1975
- 1975-06-24 CA CA230,032A patent/CA1046267A/en not_active Expired
- 1975-07-04 DE DE7521238U patent/DE7521238U/en not_active Expired
- 1975-07-09 SE SE7507867A patent/SE427902B/en unknown
- 1975-07-09 FR FR7521531A patent/FR2277626A1/en active Granted
- 1975-07-09 GB GB28837/75A patent/GB1516323A/en not_active Expired
- 1975-07-09 CH CH896975A patent/CH600957A5/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| SE427902B (en) | 1983-05-24 |
| GB1516323A (en) | 1978-07-05 |
| FR2277626A1 (en) | 1976-02-06 |
| US3915114A (en) | 1975-10-28 |
| SE7507867L (en) | 1976-01-12 |
| CH600957A5 (en) | 1978-06-30 |
| DE7521238U (en) | 1976-04-29 |
| FR2277626B1 (en) | 1982-11-12 |
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