WO1998019174A1

WO1998019174A1 - Component testing device

Info

Publication number: WO1998019174A1
Application number: PCT/DE1997/002186
Authority: WO
Inventors: Horst Gröninger
Original assignee: Siemens Aktiengesellschaft
Priority date: 1996-10-31
Filing date: 1997-09-25
Publication date: 1998-05-07
Also published as: DE19645038C1

Abstract

A component testing device with a two-piece connecting member between a connecting rod and a component holder. Both pieces of the connecting member can be tilted against each other, thus enabling compensation of insufficient alignment between the component contact plane and the plane of the contact arrangement upon which contacts are to be placed.

Description

description

Component test device

The invention relates to a component test device according to the preamble of patent claim 1.

For the automatic testing of components, a device is necessary which picks up the component to be tested and feeds it to a component tester which checks the electrical properties to be checked. For this purpose, this component tester generally has a contact arrangement which corresponds to the contacts of the component and via which the component to be tested is electrically connected.

A component holder is usually provided which sucks in the component by means of a vacuum. Then the component holder is moved to the contact arrangement of the test device and the component with its contacts is placed on the corresponding contacts of the contact arrangement. Then this is done

Check the component. After checking, the component holder is used to remove the component from the contact arrangement again and place it in a designated location. After the component has been put down, a new component can be picked up, after which the process described above can be repeated indefinitely with new components again and again.

For the actual test process, it is important that the contacts of the component rest evenly on the contacts of the component tester. If this is not the case, ie one or more contacts are not yet touching the contact arrangement of the component tester while some are already in place, this leads to the following disadvantages. On the one hand, in such a case, the test would result in a defective component, although this may not actually be the case. In order to exclude this probability, the component must be placed on the contact arrangement with increased pressure ensure contacting for all contacts. As a further problem, this would either lead to an undesired deformation of the component contacts or even damage to the same.

An IC test handler (e.g. Delta Flex Pick & Place) is known from the prior art, in which the component holder can be moved in the axial direction of the connecting rod by means of a push rod in order to place the component on the contact arrangement and then remove it. In order to solve the problem described above, precise alignment is necessary in this known device so that the plane of the component contacts is aligned plane-parallel to the plane of the contact arrangement of the component tester. Due to temperature influences, it can quickly occur in this device due to the occurrence of

Thermal expansion lead to misalignment. This leads to the need to readjust this known device frequently.

Therefore, the object of the invention is to provide a component test device in which, despite slight adjustment errors, a perfect alignment of the component is always reliably ensured when it is put on.

This object is achieved with the features listed in claim 1.

Because the claimed device is divided into two and can be tilted in a direction perpendicular to the axial longitudinal direction of the push rod, the component test device according to the invention yields when it is placed on the contact arrangement as soon as not all the component contacts are placed on the contact arrangement at the same time. Thus, at the time of attachment, the level of the component contacts is automatically aligned with the level of the contact arrangement of the component tester. Further advantageous embodiments of the invention are listed in the subordinate claims.

The invention is explained in more detail below using an exemplary embodiment with reference to the drawing.

Show it:

1 shows an exemplary embodiment of a component test device, FIG. 2 shows a detail of the device shown in FIG. 1 before being placed on an inclined plane, and FIG. 3 is a sectional view of the device according to FIG. 1 after being placed on an inclined plane.

FIG. 1 shows an exemplary embodiment of a component test device which consists of a push rod 2, a connecting unit 3 and a component holder 1. Furthermore, a guide rod 10 is fastened to the connecting part 3 in order to prevent the overall arrangement from rotating about the axis of rotation of the push rod 2. A pickup 12 is provided on the component holder 1 in order to receive a component 6 to be checked and to hold it on the component holder. Furthermore, pre-centering pins 7 are provided on the component holder 1, the function of which will be described later. The

Connecting part 3, which connects the push rod to the component holder, is divided into two, the mechanical connection between the push rod side of the connecting part and the component holder side 3b of the connecting part being effected by means of collar screws. For this purpose are on the push rod side

3a of the connecting part provided holes through which the collar screws are inserted, the holes being countersunk so that they accommodate the countersunk heads of the collar screws. On the corresponding opposite side, corresponding holes are provided in the component holder side 3b, which are provided with a thread, so that the collar screws 5 can be screwed into the respective thread. The

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The normal operation of the exemplary embodiment of the component test device shown in FIG. 1 is explained below. A component 6 held with the pickup 12 is guided with the component test device to a contact device, not shown, of a test device, also not shown. It is now provided that the component 6 with its contacts 9 is placed on the contact arrangement of the test device in order to be checked by the test device. For this purpose, the test device with the component is guided over the contact arrangement and then lowered by means of the push rod 2, so that the contacts 9 of the component 6 come into contact with the contact arrangement. In order for the component 6 to be checked properly, the contacts 9 must all lie evenly on the contact arrangement. For this purpose, the test device must be precisely aligned with the contact arrangement beforehand. In order to prevent the component from being placed next to the contact arrangement, the pre-centering pins 7 are provided which are arranged in relation to the component on the component holder in such a way that they can be inserted into pre-centering pin recesses (not shown) which have the same reference to Contact arrangement are arranged.

As soon as the contacts 9 of the component 6 rest on the contact arrangement, a compressive force counteracting the pushing force which is supplied via the push rod 2 is generated via the contact arrangement. This counter pressure causes the spiral springs 8, which surround the collar screws 5, to be compressed, so that the distance between the push rod side 3a of the connecting part and the component holder side 3b of the connecting part disappears and the spherical side of the push rod against the concave depression of the pressure plate 4 presses. Because the distance between the push rod side 3a and the component holder side 3b is compressed, the countersunk heads of the collar screws 5 now protrude from the counterbores.

2 and 3 now show what happens when the plane in which the contact arrangement is located are not aligned with the plane of the contacts 9 of the component 6 100 percent flat parallel to each other.

As shown in FIG. 2, when the contacts 9 approach the plane 14 of the contact arrangement, there is an angle between the two aforementioned planes. This means that the contacts 9 of the component 6 first come into contact with the contact arrangement on the X side, while the contacts on the Y side are not yet in contact with the contact arrangement. Due to the pressure exerted by the push rod 2, a counter pressure is first exerted on the component holder 1 by the contacts 9 on the X side. As a result of this pressure, the component holder 1 tilts to such an extent that the contacts 9 on the Y side also come into contact with the contact arrangement and prevent the component holder 1 from tilting further.

By tilting the component holder 1, as is now shown in FIG. 3, the level of the contact arrangement is again aligned plane-parallel to the level of the contacts 9 of the component. Due to the counter pressure against the push rod 2, the collar screws with their countersunk heads are pressed out of the recesses on the push rod side 3a of the connecting part, so that the collar screws are now sufficiently free on the larger diameter of the holes

Find the push rod side of the connecting part. As a result of this play, the component holder tilts together with the component holder side 3b of the connecting part, as a result of which the previously described plane-parallel alignment takes place without being impeded by the push rod side 3a of the connecting part. It follows from this that the push rod side 3a now assumes an angular position relative to the component holder side 3b, which corresponds to the angular position α between the plane of the contacts 9 and the plane of the contact arrangement. The arrangement of the collar screws 5, as shown in FIG. 4, ensures that with this embodiment of the component test device, any surface misalignment of the plane of the contacts 9 to the plane of the contact arrangement can be compensated for by means of the device described above. A reliable and safe contact with the contacts 9 is thus always guaranteed without exposing the component to the risk of destruction and without being hindered by frequent re-adjustment work.

Claims

claims

1. component test device with: a) a component holder (1), which receives a component to be tested (6), b) a push rod (2), which moves the component holder in a forward direction from an initial position into one of there in the axial longitudinal direction Push rod (2) lying test position, characterized byc) a connecting element which consists of cl) a push rod part (3a) which is fastened to a push rod end which points in the forward direction and c2) a component holder part (3b) which is on the component holder is arranged, the push rod part (3a) and the component holder part (3b) being connected to one another in such a way that they can be inclined to one another at least in a direction perpendicular to the longitudinal axis of the push rod.

2. Component test device according to claim 1, so that the push rod part (3a) and the component holder part (3b) are spaced apart from one another by means of spacer elements against a spring force.

3. Component test device according to claim 1 or 2, so that the push rod end protrudes through the push rod part (3a) attached to it and can be pressed against the spring force against the component holder part (3b) in the forward direction.

4. component test device according to claim 3, d a d u r c h g e k e n e z e i c h n e t that the push rod end protruding through the push rod part (3a) is spherical.

5. component test device according to claim 3 or 4, characterized in that the push rod end faces a concave pressure plate (4) which is arranged on the component holder part (3b) to receive the pressure from the push rod end.

6. component test device according to claim 2 to 5, d a d u r c h g e k e n n z e i c h n e t that four collar screws (5) are used as spacers, which are arranged in the corners of a square, the diagonal of which intersect in the longitudinal axis of the push rod (2).

7. Component test device according to claim 6, that the spring force is applied by spiral springs (8) which are guided around the collar screws (5), and both against the

Push the push rod part (3a) as well as against the component holder part (3b).

8. component test device according to one of claims 2 to 7, characterized in that the spacer elements to the push rod part (3a) have a lateral play when the push rod part (3a) is pressed against the component holder part (3b), the lateral play limits the extent of inclination .