CN112643304B

CN112643304B - Device and method for precisely assembling assembly elements

Info

Publication number: CN112643304B
Application number: CN202011021245.4A
Authority: CN
Inventors: 马丁·纽瑟
Original assignee: ASM Assembly Systems GmbH and Co KG
Current assignee: ASMPT GmbH and Co KG
Priority date: 2019-10-10
Filing date: 2020-09-25
Publication date: 2023-06-27
Anticipated expiration: 2040-09-25
Also published as: DE102019127292A1; CN112643304A; DE102019127292B4

Abstract

The invention relates to a spray head (100) for a vacuum extractor (300) for mounting a mounting element (109) to a mounting profile, wherein the spray head (100) comprises a base body (101) and an ejector (103). The ejector (103) is arranged in the base body (101) in a manner that it can be moved between a suction position and an ejection position, wherein the base body (101) has at least one flow channel (105) through which a pressure or vacuum can be applied to the ejector (103) in order to move the ejector (103) between the suction position and the ejection position. The invention also relates to a vacuum extractor and an assembly method.

Description

Device and method for precisely assembling assembly elements

Technical Field

The invention relates to an ejector head for a vacuum extractor, the vacuum extractor and an assembly method.

Background

Mounting elements, such as Light Emitting Diodes (LEDs), for mounting surfaces or mounting profiles have different physical properties as a result of the manufacturing process. Due to these different physical properties, the adhesion or cohesive forces of the individual fitting elements to the vacuum extractor for fitting may differ significantly. Accordingly, in the case of fitting components that tend to be highly adhesive, problems may occur when ejecting the fitting components from the vacuum extractor.

It is known to apply a compressed air flow directed through a respective vacuum extractor to the fitting element in order to eject the fitting element from the vacuum extractor. The strength of such a compressed air flow cannot be selected arbitrarily in order to avoid damaging the fitting elements already arranged on the fitting profile to be fitted, so that the vacuum extractor may form a bond with the fitting elements which tend to have a high degree of adhesion, thereby interrupting the fitting process and increasing costs.

Disclosure of Invention

Against this background, it is an object of the present invention to provide an improved spray head for a vacuum extractor, which spray head does not have the above-mentioned drawbacks. In particular, the object of the invention is to provide a possibility to reliably eject the assembly element from the vacuum extractor, so that a tight assembly of the assembly profile with the assembly element can be achieved.

The solution according to the invention for achieving the above object is characterized by what is stated in the independent claims. Further features and details of the invention are found in the dependent claims, the description and the drawings. In the present invention, the features and details described in connection with the spray head or vacuum extractor are of course also applicable in connection with the assembly method according to the invention and vice versa, so that mutual references or mutual references are always possible in connection with the disclosure of the aspects of the invention.

In a first aspect, the invention relates to a spray head for a vacuum extractor for fitting a fitting element to a fitting profile. The ejection head comprises a base body and an ejector, wherein the ejector is arranged in the base body in a manner that it can move between a suction position and an ejection position, and wherein the base body comprises a flow channel through which a medium flowing under pressure or vacuum can act on the ejector to move the ejector between the suction position and the ejection position.

In the context of the present invention, a base is understood to be a housing or a container in which an ejector provided according to the invention is movably arranged.

In the context of the present invention, an ejector is understood to mean an element, such as a piston or cylinder, which is arranged in a base body in a manner that it can be moved between a suction position and an ejection position.

The jet head of the present invention is based on the following principle: a mechanical force or mechanical impact is applied to the fitting element to disengage the fitting element from the edge of the spray head according to the invention and place it accordingly on the fitting profile to be fitted. To this end, according to the invention, a spray head is provided which can be arranged on the vacuum extractor or integrated as a unitary component into the vacuum extractor.

The ejection head according to the present invention includes a base body and an ejector. The ejector can be moved between its suction position and its ejection position depending on the pressure conditions prevailing in the base body or the medium flowing through the base body. This means that the ejector is in its suction position or moves from its ejection position to its suction position when a vacuum is present on the ejector head. Accordingly, when a medium or positive pressure (i.e., an overpressure) is applied to the ejection head, the ejector is in its ejection position or moves from its suction position to its ejection position.

When the ejector is moved from its suction position to its ejection position due to its own weight and its acceleration, the ejector generates an ejection force or mechanical impact that is transmitted to a fitting element disposed on the ejection head to overcome adhesion between the fitting element and the ejection head and disengage the fitting element from the ejection head.

In order to move the ejector between its suction position and its ejection position, the ejection head of the invention comprises a flow channel through which the medium, in particular compressed air, is transferred to the ejector with positive pressure. In addition, the flow channel is used to apply negative pressure to the ejector by applying vacuum to the flow channel.

The ejector may comprise a contact surface configured to face a flow of medium, in particular a compressed air flow, through the ejector head and to transmit pressure from the medium to the ejector, therewith moving the ejector from its suction position to its ejection position.

In addition, the ejector can be vacuum-applied through its contact surface to squeeze or move the ejector from its ejector position to its suction position at ambient pressure when a vacuum is present in the flow channel.

The ejector may comprise a contact area arranged to contact the respective mounting element at one end of the ejector. The contact area may be planar in shape or have any other technically suitable shape. The contact area can be designed in particular according to the respective assembly element to be ejected. Furthermore, the contact area may be surrounded by a surface layer which minimizes the adhesion between the ejector and the corresponding mounting element.

The invention proposes that the ejector be arranged in the base body in such a way that, when the ejector is moved from the intake position into the ejection position, a mechanical impact is transmitted by its own weight to a mounting element arranged at the ejection head, which mechanical impact acts on the mounting element together with a pneumatic impact transmitted to the mounting element by means of a medium to be guided through the base body, in order to eject the mounting element.

The ejector according to the invention can cooperate with a medium (such as a compressed air stream) flowing through the spray head in order to transmit the greatest impact force to the corresponding mounting element, whereupon the mounting element is ejected or detached from the surface of the spray head quickly and reliably. This means that the medium transmits aerodynamic or pneumatic impacts, while the ejector transmits ejector impacts or mechanical impacts to the mounting element. Accordingly, the pneumatic impact and the ejector impact act together as an additional force. In particular, it is proposed here that the ejector impact and the pneumatic impact act simultaneously on the mounting element in order to exert a very strong force on the mounting element.

In addition to the mechanical impact from the ejector, the ejector may have a central channel configured to convey the medium through the ejector to the outlet region of the spray head and ultimately onto the respective mounting element in order to apply a pneumatic impact to the mounting element via the respective medium. The central channel may in particular be provided as a central bore in the ejector.

The invention may further provide that the ejector comprises a central channel which is connected to at least one lateral channel which is laterally introduced into the ejector, such that the medium introduced into the ejector through the central channel exits the ejector via the at least one lateral channel.

The invention may also provide that the base body sealingly covers the respective opening of the at least one lateral channel when the ejector is in the suction position, so as to minimize medium flowing out of the respective opening of the at least one lateral channel, and that the base body comprises at least one flow space configured to release the respective opening of the at least one lateral channel and to allow medium to flow out of the respective opening of the at least one lateral channel into the flow space when the ejector is in the ejection position.

In order to achieve the fastest possible displacement of the ejector and simultaneously the application of pneumatic and ejector impacts to the assembly element, the ejector may be movably mounted in the region of the base body, for example a flange (flange), wherein the flange only partially surrounds the ejector, whereas the opening of the ejector only partially extends through the ejector and is in communication with the surroundings of the ejector via a lateral passage. With this configuration, in which the medium flows only through the portion of the ejector, it is achieved that the medium first hits the contact surface of the ejector, penetrates into the central channel of the ejector and presses the bottom of the central channel as a result of the lateral channels of the ejector being closed by the flange, so that the ejector is moved away from its suction position. Due to the movement of the ejector, the lateral channels of the ejector are displaced relative to the flange and turn into the flow area under the flange, so that the medium can flow through the lateral channels into the flow area under the flange. Accordingly, the medium flows through the flow area under the flange in the direction of the respective mounting element, and the ejector is likewise moved in the direction of the mounting element due to its own weight, its acceleration and the remaining contact with the medium, so that the mounting element is substantially simultaneously moved by the ejector impact and by the medium pneumatic impact, and is thus detached from the ejection head.

The invention may also provide that the ejector comprises a sealing ring which is arranged between a contact region of the ejector for contacting the mounting element and a corresponding outlet of at least one lateral channel of the ejector.

By means of the sealing ring arranged below the respective outlet opening or below the opening of the respective lateral channel and above the contact area of the ejector, the medium flowing through the ejector can be guided onto the sealing ring, so that the sealing ring and thus the ejector, together with the medium, move past the spray head, so that the contact area together with the pneumatic impact or the respective mass flow of the medium flowing under the sealing ring or laterally of the sealing ring, impinges on the respective mounting element.

The invention may also provide that the at least one lateral channel comprises a first lateral channel and a second lateral channel arranged opposite the first lateral channel, and that the first lateral channel and the second lateral channel guide a medium which is guided through the central channel into the ejector to the mounting element via a contact region of the ejector for contacting the mounting element.

By means of two oppositely arranged lateral channels, a certain medium or a medium passing through the spray head according to the invention can be guided to selected areas of the respective fitting elements in order to minimize damage caused by the accompanying flow to the fitting elements already arranged on the respective fitting profile to be fitted.

The invention may also provide that the base body comprises a control flow channel for controlling the air pressure present in the base body, and that the ejector has a sealing element by means of which the control flow channel is opened when the ejector is in the suction position and is closed when the ejector is in the ejection position.

By means of the control flow channel, the pressure conditions in the spray head can be adjusted, wherein a targeted release of the vacuum is achieved, for example, by the control flow channel, so that the corresponding component is prevented from sticking to the vacuum extractor. The ejector according to the invention may therefore have a sealing element for sealing the control flow channel, which results in a pressure loss in the injection head and a corresponding reduction of the vacuum on the components for ejecting the mounting element when the control flow channel is vented. The sealing element can be designed, for example, as a sealing ring or can be provided by a corresponding shaping of the base body of the injection head according to the invention. The sealing element is designed such that it selectively releases the control channel only when the ejector is in its suction position, so that the vacuum present in the ejector head can be controlled or regulated.

The invention can also provide that the ejector is made of heavy metal in particular, in order to additionally maximize the power impact that the ejector transmits to the mounting element arranged on the injection head, in particular when it is moved downwards in the z-axis.

By means of an ejector made of metal or another dense material or heavy material, the ejector impact transmitted by the ejector to the respective mounting element can be maximized or adjusted. To this end, the ejector may be made entirely or partially of metal such as brass or tungsten.

In a second aspect, the invention relates to a vacuum extractor with a viable design of the inventive spray head.

The spray head of the invention is particularly useful for operating the vacuum extractor of the invention, so that the advantages described in relation to the spray head of the invention can be combined in relation to the vacuum extractor of the invention.

In a third aspect thereof, the invention relates to an assembly method for assembling an assembly element to an assembly profile. The assembly method comprises the following steps:

pick-up, with the possible design of the vacuum extractor of the present invention, pick-up of the assembly components with the vacuum provided;

the ejector of the ejector is moved from its suction position to its ejection position by applying an overpressure to the ejector of the vacuum extractor, and by the movement of the ejector, a mechanical impact is applied to the mounting element in addition to the pneumatic impact caused by the overpressure.

The inventive assembly method is particularly useful for operating the inventive vacuum extractor by using the inventive spray head, so that the advantages described in relation to the inventive spray head and the inventive vacuum extractor can be combined in relation to the inventive assembly method.

The invention proposes to select a Light Emitting Diode (LED) as the mounting element.

Drawings

Further developments of the invention refer to the following description of certain embodiments of the invention, which are shown in the drawings. All features and/or advantages deriving from the claims, the description or the figures, including structural details and spatial arrangements, are essential features of the invention, both alone and in different combinations.

Fig. 1 schematically shows a side cross-sectional view of a possible embodiment of an ejection head according to the invention in an inhalation position.

Fig. 2 schematically shows a side cross-sectional view of the ejection head of fig. 1 in an ejection position.

Figure 3 schematically shows a possible embodiment of a vacuum extractor according to the invention.

Fig. 4 schematically shows a possible embodiment of the assembly method according to the invention.

Reference numerals illustrate:

100. jet head

101. Matrix body

103. Ejector device

105. Flow channel

107. Contact area

109. Fitting element

111. Flow channel

113. Controlling a flow channel

115. Flange

201. Overlapping region

203. Contact surface

205. Central channel

207. Lateral channel

209. Lateral channel

211. Sealing ring

300. Vacuum removing device

301. Pressure generator

303. Flow body

400. Assembling method

401. Pick-up step

403. And (3) ejection.

Detailed Description

Fig. 1 shows an ejection head 100. The ejector head 100 is used for operating and is arranged on a vacuum mover so that in a suction mode of the vacuum mover, vacuum is applied to the ejector head 100 by the vacuum mover to pick up the fitting element, and in an ejector mode, the fitting element is ejected by the vacuum mover by pressurizing the ejector head 100 with a medium such as compressed air, whereupon the fitting element is fitted to the fitting profile to be fitted.

The ejection head 100 includes a base 101 and an ejector 103. Within the base 101, the ejector 103 is movable between a suction position as shown in fig. 1 and an ejection position as shown in fig. 2.

To move the ejector 103, the pressure present in the flow channel 105 of the substrate is changed. By applying a vacuum to the flow channel 105, the ejector 103 is forced by ambient pressure to the suction position as shown in fig. 1, at which time the contact area 107 of the ejector 103 for contacting the mounting element 109 is spaced from the mounting element 109.

With the ejector 103 in the suction position, the vacuum present at the flow channel 105 can act on the mounting element 109 via the flow channel 111 and/or a corresponding bypass channel (not shown in the figures) at the ejector 103 in order to suck the mounting element 109.

In addition, when the ejector 103 is at the suction position, the vacuum existing at the ejection head 100 can be controlled by the control flow passage 113, by which the determined vacuum release is performed. The control flow channel 113 is formed by a channel or a flange 115 in the base body 101, which flange can be constructed as an integral component of the base body 101 or embedded in the base body 101.

When a medium such as compressed air is applied through the flow passage 105, the ejector 103 moves from the suction position shown in fig. 1 to the ejection position shown in fig. 2 due to the corresponding positive pressure and its own weight.

Fig. 2 shows the spray head 100 according to fig. 1, with the ejector 103 in its ejection position. This means that the contact area 107 touches the mounting element 109 and presses it away from the spray head 100, as indicated by the overlap area 201.

When the ejector 103 moves from the suction position shown in fig. 1 to the ejection position shown in fig. 2, the ejector encounters a medium such as compressed air on the contact surface 203, thereby creating a positive pressure on the contact surface 203, causing the ejector 103 to move in the direction of the mounting member 109. In this case too, the medium enters the central channel 205 of the ejector 103 and is forced onto the bottom of the central channel 205 of the ejector 103 by the

lateral channels

207 and 209 being closed by the flange 115, so that the ejector 103 is pressurized in addition to the pressure on the contact surface 203.

Once the ejector 103 reaches the ejector position, the sealing element 208 formed by the shape of the ejector 103 closes the control flow channel 113 so that all of the medium flowing through the flow channel 105 flows into the central channel 205 of the ejector 103.

When the ejector 103 is in the ejector position, the

lateral channels

207 and 209 are released, i.e. no longer closed by the flange 115, so that the medium flowing from the flow channel 105 into the central channel 205 flows out of the ejector 103 via the

lateral channels

207 and 209 in the direction of the fitting element 109. In this case, the medium can be guided to a predetermined position on the mounting element 109 by an optional sealing ring 211 arranged at a distance from the base body 101.

Furthermore, by means of the sealing ring 211, an additional contact surface can be provided for the medium flowing through the injection head 100, which can optionally be used to further accelerate or pressurize the ejector 103 on its way towards the mounting element 109 and to maximize the mechanical impact transmitted to the mounting element by the ejector 103.

Accordingly, pneumatic impact is applied to the mounting member 109 by the medium flowing through the seal ring 211, and mechanical impact is applied thereto by the ejector 103, thereby ejecting or disengaging the mounting member 109 from the ejection head 100.

Fig. 3 shows a possible embodiment of a vacuum extractor 300 of the present invention. Vacuum extractor 300 includes a pressure generator 301 that may be used to generate positive pressure, such as by compressed air or to provide a vacuum.

The pressure generator 301 is connected to a flow body 303, as shown in fig. 1 and 2, on which the spray head 100 is arranged.

Fig. 4 shows a possible embodiment of the assembly method 400 of the present invention.

In the pick-up step 401, the mounted component is picked up by the vacuum mover with the vacuum applied to the ejector head of the vacuum mover.

In the ejection step 403, positive pressure is applied to the ejector of the vacuum ejector to move the ejector of the ejector from its suction position to its ejection position, and by the movement of the ejector, mechanical impact is applied to the fitting element in addition to pneumatic impact caused by the pressure-providing medium.

Claims

1. A spray head (100) for a vacuum extractor (300) for fitting a fitting element (109) to a fitting profile, wherein the spray head (100) comprises:

-a substrate (101);

an ejector (103),

wherein the ejector (103) is arranged in the base body (101) in a manner capable of moving between a suction position and an ejection position, and

wherein the base body (101) has at least one flow channel (105) through which pressure or vacuum can be applied to the ejector (103) to move the ejector (103) between the suction position and the ejection position;

the ejector (103) comprises a central channel (205) and a sealing ring (211), said central channel being connected to at least one lateral channel (207, 209) laterally leading into the ejector (103) in such a way that the medium guided into the ejector (103) through the central channel (205) flows into the at least one lateral channel (207, 209); the sealing ring is arranged between a contact region (107) of the ejector (103) for contacting a mounting element (109) and a corresponding outlet of at least one lateral channel (207, 209) of the ejector (103),

the ejector (103) is arranged in the base body (101) in such a way that, when the ejector is moved from the suction position to the ejection position, a mechanical impact is transmitted by its own weight to a fitting element (109) arranged at the ejection head (100), which mechanical impact acts on the fitting element (109) together with a pneumatic impact transmitted to the fitting element (109) by means of a medium to be guided through the base body (101) to eject the fitting element (109),

when the ejector (103) is in the ejector position, medium may flow along the at least one flow channel (105) to the mounting element (109).

2. The spray head (100) according to claim 1,

it is characterized in that the method comprises the steps of,

the base body (101) comprises a control flow channel (113), which control flow channel (113) extends between the at least one flow channel (105) and the outside of the injection head (100) for controlling the pressure present in the base body (101), and

the ejector (103) has a sealing element by means of which the control flow channel (113) is open when the ejector (103) is in the suction position and closed when the ejector (103) is in the ejection position.

3. The spray head (100) according to claim 1,

it is characterized in that the method comprises the steps of,

the at least one lateral channel (207, 209) comprises a first lateral channel (207) and a second lateral channel (209) arranged opposite the first lateral channel (207), and the first lateral channel (207) and the second lateral channel (209) are configured to guide a medium introduced into the ejector (103) through the central channel (205) over a contact area (107) of the ejector (103) for contacting a mounting element (109) onto the mounting element (109).

4. The spray head (100) according to claim 1,

it is characterized in that the method comprises the steps of,

the base body (101) sealingly covers the respective opening of the at least one lateral channel (207, 209) when the ejector (103) is in the suction position, so as to minimize the outflow of medium from the respective opening of the at least one lateral channel (207, 209), an

The base body (101) comprises at least one flow space configured to release a respective opening of the at least one lateral channel (207, 209) when the ejector (103) is in the ejection position and to allow a medium to flow out of the respective opening of the at least one lateral channel (207, 209) into the flow space.

5. The spray head (100) according to claim 1,

it is characterized in that the method comprises the steps of,

the ejector (103) comprises a metal to maximize the impact that the ejector (103) transmits to a mounting element (109) arranged at the ejection head.

6. A vacuum extractor (300) having an ejector head according to any one of claims 1 to 5.

7. A fitting method (400) for fitting a fitting element (109) to a fitting profile,

wherein the assembly method (400) comprises the steps of:

-picking up (401), in case the ejector head (100) of the vacuum extractor (300) is applied with vacuum, picking up the assembly element (109) by means of the vacuum extractor (300) according to claim 6;

-applying pressure (403) to the ejector head (100) of the vacuum extractor (300) to move the ejector (103) of the ejector head (100) from its suction position to its ejection position, and by movement of the ejector (103), applying mechanical impact to the mounting element (109) to act on the mounting element (109) together with pneumatic impact to eject it.