JPH04176532A - Clamp device for packaged substrate - Google Patents

Abstract

PURPOSE:To clamp a packaged substrate in the specified state, by forming a pin tip increased toward the end at its thickness, hanging a steel ball on this part, and pulling down the pin together with a packaged substrate with the force of a spring. CONSTITUTION:A substrate 20 is mounted on a table 2, a pin 8 is inserted into a guide. When an air cylinder 32 is descended in this state, a sleeve 26 is descended together with a cylinder plate 30, by the force of a spring 24. The sleeve 26 descends a steel ball 28 stored in the hole of the upper part together. When the steel ball 28 is hung on the projection of the tip of the pin 8, it tries to descend the pin 8 together. The pin 8 follows to the descent of the steel ball 28, but when it is descended to the specified position, the descent is hindered by the upper face of a guide 4 and substrate 20. On further descent of the air cylinder 32, a cylinder plate 30 and the sleeve 26 are separated, and the pin 8 stops in the state of being drawn downward by the sleeve 26.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mounting board clamping device, and in particular, it is capable of accurately clamping a mounting board while reducing the work involved before and after processing the external shape of the mounting board. This relates to a fixing mechanism.

[Prior art] A conventional mounting board clamping device is disclosed in Utility Model Application No. 1309/1986.
As described in the publication, the structure was such that a straight pin driven into a mounting board is clamped by a parallel ramp mechanism.

[Problems to be Solved by the Invention] The above-mentioned conventional technology requires a step of driving the straight pin into the mounting board as a pre-processing work and pulling out the straight pin from the mounting board as a post-processing work. When processing the external shape of a mounting board, there is a problem in that the number of straight pins is large, and the processing before and after processing takes a very long time.

Further, since the substrates are processed one by one, the inner circumferential surface of the straight pin hole alone is not sufficient to hold the straight pin, resulting in the problem that the straight pin may come off.

Furthermore, since the straight pin is clamped by a parallel ramp mechanism to the straight pin, it is not possible to clamp the mounted board in a pulled down state strongly enough to correct warping, lifting, etc. of the mounted board.

In addition, due to insufficient clamping force, there is a risk that the mounted components may come into contact with a part of the mounted board processing machine and be damaged due to warping of the mounted board or vibrations generated during processing.

An object of the present invention is to provide a mounting board clamping device that can substantially eliminate pin driving and pin removal operations as pre- and post-processing operations, and can clamp a mounted board in a predetermined state while correcting warpage and lifting of the mounted board. It is to provide.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a stepped pin having a head having a larger diameter than a hole in a fixed target board on which a component is mounted, and a tip protrusion that can pass through the hole. , a member that guides the insertion of the pin, a sliding member that is housed coaxially in this guide member and that depresses the protrusion at the tip of the pin when it is lowered and releases the protrusion at the raised position, and a downward force that is constantly applied to the sliding member. The present invention proposes a mounting board clamping device comprising a member for applying force, and means for applying a pushing force stronger than the pushing down force to the sliding member when releasing the board.

Specifically, the sliding member includes a steel ball that engages with and disengages from the tip projection of the pin, and a sleeve that accommodates the steel ball in a hole at the upper end.

The sliding member may also be a sleeve having a protrusion on the inner peripheral surface of the upper end of the split end that engages and disengages with the tip protrusion of the pin.

A spring is used as a member to push down the sliding member,
An air cylinder can be used as a means for pushing up the sliding member.

In addition, in order to prevent damage to the mounted components, it is necessary to provide a buffering elastic material between the lower surface of the mounting board where there are no components and the table on which this board is placed, and at least between the board and the table around the guide member. Physical intervention is desirable.

Furthermore, if a means is provided for blowing air inside the sliding member and the guide member when the substrate is released, the clamping function can be maintained well.

When any of the above mounted board clamping devices is applied to a mounted board processing machine, there is a right-handed bit for processing the board, a pressure foot that has a brush at the tip that contacts the board and surrounds the bit, and the inside of this pressure foot. A dust collector will be installed to suck in machining chips.

[Function] In the present invention, the pin, except for the head, has a smaller diameter than the fixing hole of the mounting board. Therefore, attaching the pins to the mounting board is not done by driving them in like in the past.
Since it is a simple insertion, there is virtually no need for a pin driving machine or a pin pulling machine for pre- and post-processing operations.

In addition, in order to accurately clamp the mounted board and correct warpage and lifting of the mounted board, the diameter of the pin near the tip of the pin is made thinner, and the tip of the pin is formed with a thicker tip, and a steel ball is hung on this part, for example. For example, the pin is pulled down together with the mounting board by the force of a spring.

In such a structure, the head of the pin, which has a diameter larger than the fixing hole of the mounting board, reliably presses down the mounting board, so the mounting board is corrected from warping or lifting by strong force, for example, when mounting the board. It is fixed at a predetermined position on the substrate processing machine.

More specifically, it is clamped by the force of a spring,
Re-clamping is performed by the force of the air cylinder that overcomes this force, so even if the air supply to the air cylinder stops during machining, the pin will not be unclamped inadvertently, ensuring work safety. .

[Embodiment] Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 4.

FIG. 3 is a diagram showing an example of the overall configuration of a mounted board processing machine employing the mounted board clamping device of the present invention.

The mounted board processing machine uses a bed 40 and a cross rail 42 as a fixed base, and uses an X-axis motor 44 to drive an X-axis ball screw 46.
, move the table 2 back and forth, and set the position in the X-axis direction. Further, the Y-axis ball screw 52 is rotated by the Y-axis motor 5o, and the saddle 48 to which the spindle 10 is attached is moved left and right to set the position in the X-axis direction. Further, the Z-axis ball screw 56 is rotated by the Z-axis motor 54, and the saddle 48 to which the spindle 10 is attached is moved up and down to set the position in the Z-axis direction. As described above, the mounted board processing machine of the present invention is equipped with drive means in the three-dimensional directions of the X, Y, and Z axes, but mainly in the X direction.

Drive in the X-axis direction performs positioning and cutting of the external shape, and drive in the Z-axis direction performs cutting during entry.

This mounted board processing machine, as shown in FIG.
The mounting board 20 is processed along the following lines.

Prior to this, the mounting board 20 is fixed to the table 2 using the fixing pin holes 62.

Next, a mounting board clamping device for fixing the mounting board 20 to the table 2 using the fixing pins 8 will be described with reference to FIGS. 1 and 2.

FIG. 1 is a vertical sectional view showing a board clamping state of an embodiment of the mounted board clamping device according to the present invention, and FIG. 2 is a longitudinal sectional view showing the board unclamping state of the embodiment of FIG.

When setting the mounting board 20 on the table 2, first, the elastic body 22 is inserted between the table 2 and the part of the back surface of the board 20 where the components 18 are not mounted. The free height of the elastic body 22 is set higher than the gap between the substrate 2o and the table 2,
When clamped, the elastic body 22 is compressed to generate a repulsive force. In order to protect the mounted components 18 on the bottom surface of the board 20,
An elastic body 6 around the guide is also placed in a part of the guide 4 of the clamp that protrudes beyond the upper surface of the table 2. The substrate 20 is placed on the table 2 with the elastic bodies 6 and 22 inserted.
and insert the pin 8 into the guide 4. At this time, the clamping device is in an unclamped state in which the force of the air cylinder 32 overcomes the force of the spring 24 and the sleeve 26 is raised, as shown in FIG.

When the pin 8 is inserted into the guide 4 here, since the steel ball 28 has entered the thick hollow part of the hole of the guide 4, the insertion of the pin 8 is not hindered.

In this state, as shown in FIG. 1, when the air cylinder 32 is lowered, the force of the spring 24 causes the sleeve 2 to
6 descends together with the cylinder plate 30. The sleeve 26 lowers the steel ball 28 housed in the upper hole together. At this time, the steel ball 28 descends while being drawn inward along the guide 4. When the steel ball 28 is caught on the protrusion at the tip of the pin 8, it attempts to lower the pin 8 together. The pin 8 follows the descent of the steel ball 28, but once it has descended to a predetermined position, the pin 8 is prevented from descending by the upper surface of the base plate 20 and the guide 4. When the air cylinder 32 further descends, the cylinder plate 30 and the sleeve 26 are separated, and the pin 8 is stopped while being pulled downward by the sleeve 26.

Note that air is sent to the cylinder plate 30 through the air tube 36 and the joint 34 so as to communicate with the center of the sleeve 26, and if the cylinder plate 30 and the sleeve 26 come into contact in the unclamped state, the sleeve 26
An air blower is used to prevent chips, etc. from entering the inside and the inside of the guide 4.

As the mounting board processing bit 14, a right-handed bit is used so that the chips are thrown onto the upper part of the board 20. The chips sprayed on top are prevented from scattering by a brush 16 attached to the tip of the pressure foot 12, and are collected into a dust collector 58 via a dust collection hose 60.

[Effects of the Invention] According to the present invention, the pins can be easily set when setting the board, so that pin driving and pin pulling processes as pre- and post-processing operations are unnecessary.

In order to accurately clamp the mounted board and correct warping and lifting of the mounted board, the diameter of the pin near the tip of the pin is made thinner, and the tip of the pin is formed with a thicker tip. The force causes the pin to be pulled down together with the mounting board, and then the head of the pin, which has a diameter larger than the mounting board's fixing hole, reliably pushes down the mounting board, and the mounting board is prevented from warping or warping due to the strong force. With the lifting corrected, it is fixed at a predetermined position in a mounting board processing machine, for example.

On the other hand, the pin is clamped by the force of the spring and unclamped by the force of the air cylinder that overcomes this force, so even if the air supply to the air cylinder stops during machining, the pin will not be unclamped inadvertently. This ensures work safety.

In addition, an elastic body is inserted between the board and the table or around the pin clamp guide to suppress vibrations generated during processing as much as possible, and to prevent damage to mounted components.

Therefore, the earthquake resistance and reliability of the mounted components are improved, and the processing speed can be increased, which, together with the effect of reducing the pre- and post-processing operations mentioned above, improves productivity.

In addition, air is sent through the air tube and the joint so that it passes through the center of the sleeve, preventing chips from entering the inside of the sleeve and the guide when the sleeve is unclamped. Using a right-handed twist bit, the chips are ejected to the top of the board, the brush attached to the tip of the pressure foot prevents the chips from scattering, and the dust is collected into the dust collector via the dust collection hose, reducing the clamping force. Can be secured sustainably.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing a board clamping state of an embodiment of the mounted board clamping device according to the present invention, FIG. 2 is a longitudinal sectional view showing the board unclamping state of the embodiment of FIG. FIG. 4 is a diagram showing an example of the overall configuration of a mounted board processing machine employing the mounted board clamping device of the invention, and FIG. 4 is a plan view showing an example of a mounted board to be processed. 2...Table, 4...Guide, 6...Elastic body around guide, 8...Pin, 10...
Spindle, 12...Pressure foot, 14...
Bit, 16... Brush, 18... Mounted part, 20
... Substrate, 22 ... Elastic body, 24 ... Spring, 26 ... Sleeve, 28 ... Steel ball, 30 ... Cylinder plate, 32 ... Air cylinder, 34 ...
Coupling, 36...Air tube, 40...Bed, 4
2...Cross rail, 44...X-axis motor, 46.
...X-axis ball screw, 48...saddle, 50...Y
Axis motor, 52...Y-axis ball screw, 54...Z-axis motor, 56...Z-axis ball screw, 58...dust collector, 60...dust collection hose, 62...fixed hole for pin,
64... Machining trajectory.

Claims (1)

[Scope of Claims] 1. A stepped pin having a head having a larger diameter than a hole in a fixed target board on which a component is mounted and a tip projection that can pass through the hole, a member for guiding the insertion of the pin, and the guide. a sliding member that is housed coaxially in a member and that presses down the tip end projection of the pin when it is lowered and releases the tip end projection when it is in the raised position; a member that constantly applies a downward force to the sliding member; and a member that releases the substrate. and means for applying a push-up force stronger than the push-down force to the sliding member when the mounting board is clamped. 2. The mounting board clamping device according to claim 1, wherein the sliding member includes a steel ball that engages with and disengages from the tip projection of the pin, and a sleeve that accommodates the steel ball in a hole at an upper end. A featured mounting board clamping device. 3. The mounting board clamping device according to claim 1, wherein the sliding member is made of a sleeve having a protrusion on the inner peripheral surface of the upper end portion of the split end that engages and disengages with the tip protrusion of the pin. Board clamp device. 4. The mounting board clamping device according to any one of claims 1 to 3, wherein the sliding member pushing down force applying member comprises a spring, and the sliding member pushing up force applying means comprises an air cylinder. A mounting board clamping device featuring: 5. The mounting board clamping device according to any one of claims 1 to 4, wherein the mounting board is clamped between the part of the lower surface of the mounting board with no components and the table on which the board is placed, and between the board and the guide member. A mounting board clamping device characterized by interposing a buffering elastic body between at least one side of the mounting board clamping device. 6. The mounting board clamping device according to any one of claims 1 to 5, further comprising means for blowing air inside the sliding member and the guide member when the board is released. 7. A mounted board processing machine comprising the mounted board clamping device according to any one of claims 1 to 6. 8. The mounted board processing machine according to claim 7, comprising: a right-handed bit for processing the board; a pressure foot having a brush at its tip that contacts the board and surrounding the bit; and a processing cut inside the pressure foot. A mounting board processing machine characterized by being equipped with a dust collector that takes in powder.