TW201717715A - Circuit board clipping and stretching device and control method thereof - Google Patents

Abstract

A circuit board clipping and stretching device includes a socket, a fixed clipper, a first clipper, a second clipper, a third clipper, a first axial stretching structure, a second axial stretching structure and a processing unit. The socket includes a set of rails on a first axial and a set of rail chairs on a second axial, and the set of rail chairs is disposed between the set of rails in parallel. The fixed, first, second and third clippers are disposed on the rail chairs for clipping a circuit board. The first and second clippers are located on two diagonal positions of the circuit board. The fixed and third clippers are located on other two diagonal positions of the circuit board. The first axial stretching structure controls the first and third clippers to stretch the circuit board on the first axial, and the second axial stretching structure controls the second and third clippers to stretch the circuit board on the second axial. The processing unit receives stretch information to determine whether the stretched distance or the stretch power of the circuit board on the first axial and the second axial excess a setting value. The first, second and third clippers adjust the stretched area range of the circuit board according to the stretch information.

Description

Circuit board clamping and stretching device and control method thereof

The present invention relates to a circuit board clamping mechanism, and more particularly to a circuit board clamping and stretching apparatus and a control method therefor.

There are many types of electronic products, including computers and peripheral products, communication products, displays and consumer electronics. In order to ensure the function of the electronic product is normal, for the printed circuit board used, it must be confirmed whether the circuit of the printed circuit board is normal or short-circuited or broken, so it will be tested using the board tester. Generally, the working area of the circuit board testing machine is provided with a plurality of clamping mechanisms for fixing the circuit board.

However, the clamping mechanism of the conventional flexible circuit board is complicated, which is not only high in manufacturing cost and difficult to assemble, but also frequently encountered problems in detecting a flexible circuit board: first: the weight and flexibility of the flexible circuit board itself cause sagging offset The flatness of the flexible circuit board cannot be maintained, and the second is that the clamping mechanism is too large and easily interferes with the testing machine. Thirdly, how to balance the force of the clamping circuit board under the premise of simplifying the clamping mechanism problem.

The invention relates to a circuit board clamping and stretching device and a control method thereof, which can maintain the flatness of the circuit board and feed back the stretching information to solve the problem of over-pull when the circuit board is stretched.

According to an aspect of the invention, a circuit board clamping and stretching device includes a base, a fixing fixture, a first clamp, a second clamp, a third clamp, and a first axial stretching mechanism. a second axial stretching mechanism and a processing unit. The base includes a set of slide rails in a first axial direction and a set of rail mounts in a second axial direction, the set of rail mounts being disposed in parallel between the set of slide rails. The fixing jig, the first jig, the second jig and the third jig are disposed on the set of rails for holding a circuit board, wherein the first jig and the second jig are located at two opposite positions of the circuit board, and are fixed The clamp and the third clamp are located at the other two positions opposite to the circuit board. The first axial stretching mechanism is configured to control the first clamp and the third clamp to stretch the circuit board toward the first axial direction. The second axial stretching mechanism is configured to control the second clamp and the third clamp to stretch the circuit board toward the second axial direction. The processing unit is configured to receive a tensile information for determining whether the distance the circuit board is stretched in the first axial direction and the second axial direction or the force of stretching the circuit board exceeds a set value. Wherein, the first jig, the second jig and the third jig adjust the area of the board to be stretched according to the stretching information.

According to an aspect of the invention, a method of controlling clamping and stretching of a circuit board is provided, comprising the following steps. Providing a fixing fixture, a first fixture, a second fixture and a third fixture to clamp a circuit board, wherein the first fixture and the second fixture are located at two opposite positions of the circuit board, the fixing fixture and the third The fixture is located at the other two opposite corners of the board. The first clamp and the third clamp are controlled to extend the circuit board toward a first axial direction. The second clamp and the third clamp are controlled to extend the circuit board toward a second axial direction. Receiving a stretching information for judging the circuit board in the first axial direction and the second axial direction Whether the distance to be stretched and the force to stretch the board exceeds a set value. The first jig, the second jig, and the third jig adjust the area of the area in which the board is stretched according to the stretching information.

In order to better understand the above and other aspects of the present invention, the preferred embodiments are described below, and in conjunction with the drawings, the detailed description is as follows:

10‧‧‧ boards

11~14‧‧‧ diagonal position

100‧‧‧Circuit clamping and stretching device

110‧‧‧Base

112‧‧‧First slide rail

114‧‧‧Second slide

115, 117‧‧ ‧ chute

116‧‧‧First rail seat

118‧‧‧Second rail seat

120‧‧‧Fixed fixture

121‧‧‧ body

122, 132, 142, 152‧‧‧ telescopic components

123, 133, 143, 153‧‧‧ clamping parts

124, 134, 144, 154‧‧‧ rotating shaft

125‧‧‧ movable rod body

126‧‧‧Sawtooth

130‧‧‧First fixture

131, 141, 151‧‧‧ movable seat

140‧‧‧Second fixture

150‧‧‧ third fixture

160‧‧‧First axial stretching mechanism

162, 172‧‧‧ movable rod

166, 176‧‧‧ connecting members

170‧‧‧Second axial stretching mechanism

178‧‧‧Mobile platform

180‧‧‧Processing unit

D1‧‧‧ first position

D2‧‧‧ second position

L‧‧‧ baseline

X‧‧‧first axial direction

Y‧‧‧second axial

FIG. 1 is a schematic view of a circuit board clamping and stretching apparatus according to an embodiment of the invention.

2 is a schematic view of a fixing jig according to an embodiment of the present invention.

FIG. 3 is a schematic view of a first jig according to an embodiment of the invention.

4 is a schematic view of a second jig in accordance with an embodiment of the present invention.

FIG. 5 is a schematic view of a third jig according to an embodiment of the invention.

6A and 6B are schematic diagrams showing the operation of a pneumatic or hydraulic assembly for clamping a circuit board in accordance with an embodiment of the present invention.

7A and 7B are schematic diagrams showing the operation of a pneumatic or hydraulic assembly for stretching a circuit board in accordance with an embodiment of the present invention.

FIG. 8 is a flow chart showing a method of controlling clamping and stretching of a circuit board according to an embodiment of the invention.

The embodiments are described in detail below, and the embodiments are only intended to be illustrative and not intended to limit the scope of the invention.

Please refer to FIG. 1 , which is a schematic diagram of a clamping and stretching device 100 for a circuit board 10 according to an embodiment of the invention. The circuit board clamping of the embodiment The stretching device 100 is used for clamping a circuit board 10 and stretching the circuit board 10 within a range that allows stretching to solve the sagging problem caused by the weight of the circuit board 10 when performing electrical measurement, and avoiding the circuit board. 10 The problem that the circuit board 10 is deformed and the position is shifted due to over-drawing during stretching. The circuit board 10 can be a flexible printed circuit board, and the electrical measurement includes requirements for verifying that the circuit of the circuit board 10 is normal or ineffective, conforming to durability, and reliability.

The circuit board clamping and stretching device 100 includes a base 110, a fixing fixture 120, a first clamp 130, a second clamp 140, a third clamp 150, a first axial stretching mechanism 160, and a first A two-axis stretching mechanism 170 and a processing unit 180. The detailed structure of the fixing jig 120, the first jig 130, the second jig 140, and the third jig 150 will be described with reference to FIGS. 2 to 5.

Referring to FIG. 1, the base 110 includes a set of slide rails in a first axial direction X and a set of rail mounts in a second axial direction Y. The first axial direction X and the second axial direction Y are perpendicular to each other. In detail, the first rail 112 and the second rail 114 are elongated and parallel to each other, and the first rail 116 and the second rail 118 are elongated and parallel to each other. Rail seat. The first rail seat 116 spans between the first rail 112 and the second rail 114, and the second rail 118 spans between the first rail 112 and the second rail 114, and the first rail seat 116 The second rail base 118 is slidable in parallel in the first axial direction X and can be locked according to the size of the circuit board 10 to move to a fixed position. In addition, the fixing jig 120 and the second jig 140 are disposed on the first rail seat 116, and the first rail seat 116 is provided with at least one sliding slot 115, for example, so that the fixing jig 120 and the second jig 140 are in the second axial direction. Y is slidable and can be locked according to the size of the circuit board 10 to a fixed position. In addition, the first jig 130 and the third jig 150 are disposed on the second rail base 118, and the second rail base 118 is provided with at least one The chute 117 is configured to slid the first jig 130 and the third jig 150 in the second axial direction Y, and can be locked according to the size of the circuit board 10 to move to a fixed position.

In an embodiment, after the fixing jig 120, the first jig 130, the second jig 140, and the third jig 150 are locked to a fixed position according to the size of the circuit board 10, the fixing jig 120, the first jig 130, The second jig 140 and the third jig 150 are respectively clamped on the opposite positions 11 to 14 of the circuit board 10, that is, the first jig 130 and the second jig 140 are located, for example, at two diagonals of the circuit board 10. Positions 12, 14 and the fixing jig 120 and the third jig 150 are located, for example, at the other two positions 11, 13 opposite to the circuit board 10, so that there are four or more clamping positions on the circuit board 10, However, it is not limited to be at four corners or only four clamping positions, and the auxiliary supporting fixture may be added at other positions.

In addition, the first jig 130 and the third jig 150 may further stretch the circuit board 10 toward the first axial direction by the control of the first axial stretching mechanism 160, and the second jig 140 and the third jig 150 may also be The circuit board 10 is stretched toward the second axial direction Y by the control of the second axial stretching mechanism 170.

In an embodiment, the first axial stretching mechanism 160 controls the stretching distance and the tensile force of the first jig 130 and the third jig 150 by air pressure or hydraulic pressure, and feeds the stretching information to the processing unit 180 to It is judged whether the distance at which the circuit board 10 is stretched in the first axial direction X and the force of stretching the circuit board 10 exceed a set value.

In an embodiment, the second axial stretching mechanism 170 controls the stretching distance and the tensile force of the second clamp 140 and the third clamp 150 by air pressure or hydraulic pressure, and feeds the stretching information to the processing unit 180 to Whether the distance at which the circuit board 10 is stretched in the second axial direction Y and the force to stretch the circuit board 10 exceeds one Set value.

Please refer to FIG. 2, which illustrates a schematic view of a fixing fixture 120 according to an embodiment of the invention. The fixing jig 120 is disposed on the first rail seat 116 and clamped on a position 11 of the circuit board 10 as a starting reference point for electrical measurement of the circuit board 10. The fixing jig 120 has a body 121, a telescopic member 122, and a clamping member 123. The telescopic member 122 is disposed on the base 121, and the clamping member 123 is configured to fasten the circuit board 10 to the base 121. The upper jaw of the clamping member 123 is opposite to the lower jaw of the base 121 and is provided with two serrations 126. It is used to increase the friction when the circuit board 10 is clamped. A rotating shaft 124 is disposed on the base 121, and the clamping member 123 is pivotally connected to the base 121 by the rotating shaft 124 to avoid the problem of the conventional clamping structure being stuck. As shown in FIGS. 6A and 6B, the telescopic member 122 is, for example, a pneumatic component or a hydraulic component. The pneumatic component or the hydraulic component has a movable rod body 125 inside, and one end thereof can be moved in the groove to prevent jamming and is available. The clamping member 123 is rotated relative to the rotating shaft 124 to fasten the clamping member 123 to the circuit board 10 or to be unfastened from the circuit board 10.

Please refer to FIG. 3, which illustrates a schematic diagram of a first jig 130 according to an embodiment of the invention. The first clamp 130 is disposed on the second rail base 118 and clamped to a position 12 of the circuit board 10. The first clamp 130 has a movable base 131, a telescopic member 132, and a clamping member 133. The telescopic member 132 is disposed on the movable base 131, and the clamping member 133 is configured to fasten the circuit board 10 to the movable base 131. The movable base 131 is provided with a rotating shaft 134, and the clamping member 133 is pivotally connected to the movable base 131 by the rotating shaft 134. The telescopic member 132 is, for example, a pneumatic component or a hydraulic component. For the operation of the movable bar 125 of the pneumatic component or the hydraulic component, please refer to the description of FIGS. 6A and 6B, and details are not described herein again.

In FIG. 3, the first axial stretching mechanism 160 is coupled to the movable base 131 of the first jig 130, for example, by a connecting member 166. As shown in FIGS. 7A and 7B, the first axial stretching mechanism 160 is, for example, a pneumatic component or a hydraulic component, and the pneumatic component or the hydraulic component has a movable rod body 162 therein for driving the connecting member 166 and the movable seat. The body 131 is moved in the first axial direction X to stretch the circuit board 10 (please refer to FIGS. 7A and 7B, the movable lever body 162 is moved from the first position D1 to the second position D2 with respect to the reference line L). Therefore, the distance that the board 10 is stretched in the first axis X and the force to stretch the board 10 can be known by calculating the moving distance of the movable rod 162 and the force required to be pushed. The stretch information is fed back to the processing unit 180 for determination.

Please refer to FIG. 4, which is a schematic diagram of a second jig 140 according to an embodiment of the invention. The second clamp 140 is disposed on the first rail seat 116 and clamped on a position 14 of the circuit board 10. The second clamp 140 has a movable base 141, a telescopic member 142, and a clamping member 143. The telescopic member 142 is disposed on the movable base 141, and the clamping member 143 is configured to fasten the circuit board 10 to the movable base 141. The movable base 141 is provided with a rotating shaft 144, and the clamping member 143 is pivotally connected to the movable base 141 by the rotating shaft 144. The telescopic member 142 is, for example, a pneumatic component or a hydraulic component. For the operation of the movable bar 125 of the pneumatic component or the hydraulic component, please refer to the description of FIGS. 6A and 6B, and details are not described herein again.

In FIG. 4, the second axial stretching mechanism 170 is coupled to the movable base 141 of the second jig 140, for example, by a connecting member 176. The second axial stretching mechanism 170 is, for example, a pneumatic component or a hydraulic component, and the pneumatic component or the hydraulic component has a movable rod body 172 therein for driving the connecting member 176 and the movable base 141 in the second axial direction Y. Move to stretch the board 10 (please refer to section 7A and 7B, the movable lever 172 is moved from the first position D1 to the second position D2 with respect to the reference line L. Therefore, the distance that the board 10 is stretched in the second axial direction Y and the force to stretch the circuit board 10 can be known by calculating the moving distance of the movable rod 172 and the force required to be pushed thereby, thereby The stretch information is fed back to the processing unit 180 for determination.

Please refer to FIG. 5, which illustrates a schematic diagram of a third jig 150 according to an embodiment of the invention. The third clamp 150 is disposed on the second rail base 118 and clamped to a position 13 of the circuit board 10. The third jig 150 has a movable base 151, a telescopic member 152, and a gripping member 153. The telescopic member 152 is disposed on the movable base 151, and the clamping member 153 is configured to fasten the circuit board 10 to the movable base 151. The movable base 151 is provided with a rotating shaft 154, and the clamping member 153 is pivotally connected to the movable base 151 by the rotating shaft 154. The telescopic member 152 is, for example, a pneumatic component or a hydraulic component. For the operation of the movable bar 125 of the pneumatic component or the hydraulic component, please refer to the description of FIGS. 6A and 6B, and details are not described herein again.

In FIG. 5, the first axial stretching mechanism 160 is coupled to the movable base 151 of the third jig 150, for example, by a connecting member 166. The first axial stretching mechanism 160 is, for example, a pneumatic component or a hydraulic component. For the operation of the movable bar 162 of the pneumatic component or the hydraulic component, please refer to the description of FIGS. 7A and 7B, and details are not described herein again. In addition, the second axial stretching mechanism 170 is coupled to a movable platform 178 for carrying the first axial stretching mechanism 160 and the third clamp 150, for example, by a connecting member 176. The second axial stretching mechanism 170 is, for example, a pneumatic component or a hydraulic component, and the pneumatic component or the hydraulic component has a movable rod body 172 therein for driving the connecting member 176 and the movable platform 178 to move in the second axial direction Y. To stretch the circuit board 10. Therefore, the distance that the circuit board 10 is stretched in the second axial direction Y and The force of stretching the circuit board 10 can be known by calculating the sway distance of the movable shank 172 and the force required to be pushed, thereby feeding the stretch information back to the processing unit 180 for determination.

Please refer to FIG. 8 , which is a flow chart of a method for controlling clamping and stretching of a circuit board according to an embodiment of the invention. The method for controlling the clamping and stretching of the circuit board includes the following steps S101 to S110, which are described with reference to FIG. In step S101, four fixed positions 11 to 14 of a circuit board 10 are sandwiched by a fixing jig 120, a first jig 130, a second jig 140 and a third jig 150, respectively. In step S102, the first jig 130 and the third jig 150 are controlled to stretch the circuit board 10 toward a first axial direction X, and the second jig 140 and the third jig 150 are controlled to extend the circuit board 10 toward a second axial direction Y. In step S103, a stretching information is received for judging whether the distance that the circuit board 10 is stretched in the first axial direction X and the second axial direction Y and the force to stretch the circuit board 10 exceed a set value. In step S104, after receiving the stretching information, the processing unit 180 determines whether the distance that the circuit board 10 is stretched is greater than or equal to the size-related setting value of the circuit board 10 in the first axial direction X and the second axial direction Y. (for example, 0.3% or less). For example, if the size of the circuit board 10 in the first axial direction X and the second axial direction Y is 500 mm, the distance of the circuit board 10 is set to be less than 1.5 mm to avoid over-pulling when the circuit board 10 is stretched. Problems that cause substrate deformation or positional shift. In step S105, when the distance that the circuit board 10 is stretched is greater than or equal to the set value, as described above, the movable rod body of the first axial stretching mechanism 160 and the second axial stretching mechanism 170 is locked. The stretching positions of the first jig 130, the second jig 140, and the third jig 150 are fixed. Next, in step S106, the valve switches of the first axial stretching mechanism 160 and the second axial stretching mechanism 170 are tightly closed to fix the first clamp 130, the second clamp 140, and the first The tensile force of the three clamps 150 at this fixed stretch position.

Next, in step S107, when the processing unit 180 determines that the distance that the circuit board 10 is stretched is smaller than the size-related set value of the circuit board 10 in the first axial direction X and the second axial direction Y, the processing unit 180 further determines Whether the unit area of the tensile force of the circuit board 10 is greater than or equal to the tension-related setting value (for example, 0.3 to 2 kg). If not, returning to step S104, it is repeatedly determined whether or not the distance to which the board 10 is stretched exceeds a set value. In step S108, when the unit of force for stretching the circuit board 10 is greater than or equal to 2 kg, as described above, the valve switches of the first axial stretching mechanism 160 and the second axial stretching mechanism 170 are tightly closed, The tensile force of the first jig 130, the second jig 140, and the third jig 150 is fixed. In step S109, the movable rods of the first axial stretching mechanism 160 and the second axial stretching mechanism 170 are locked to fix the first clamp 130, the second clamp 140, and the third clamp 150. Stretching position under the force. Therefore, the first jig 130, the second jig 140, and the third jig 150 can appropriately adjust the range of the area in which the circuit board 10 is stretched in accordance with the above-described stretching information.

It can be seen from the above description that when the distance that the circuit board 10 is stretched exceeds a set value, although the force for stretching the circuit board 10 does not exceed the set value, in order to prevent the circuit board 10 from being over-pull, the fixing jig 120 is pulled. Stretch the position. On the contrary, when the distance that the circuit board 10 is stretched does not exceed a set value, a greater tensile force is applied to the circuit board 10 until the circuit board 10 is stretched beyond the set value or stretched to the circuit board 10. The power exceeds the set value (whichever comes first). Next, in step S110, after the completion of the stretching confirmation, the circuit board 10 is electrically measured. For example, the probe card is used to energize the electrical contacts on the circuit board 10 to ensure Confirm that the circuit of the circuit board 10 is normal or invalid.

The circuit board clamping and stretching device and the control method thereof disclosed in the above embodiments of the present invention can stretch the circuit board within a range of allowable stretching to solve the sagging caused by the own weight when the circuit board is electrically measured. Problem, and avoid the problem that the board is deformed and the position is shifted due to over-pull when the board is stretched. In addition, the size of the clamp is small, and it is not necessary to exit the interference zone of the electrical tester, and the serrated chuck can relatively increase the friction of the clamped circuit board, which has the advantages of cost reduction and assembly simplification.

In conclusion, the present invention has been disclosed in the above preferred embodiments, and is not intended to limit the present invention. A person skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

10‧‧‧ boards

11~14‧‧‧ diagonal position

100‧‧‧Circuit clamping and stretching device

110‧‧‧Base

112‧‧‧First slide rail

114‧‧‧Second slide

115, 117‧‧ ‧ chute

116‧‧‧First rail seat

118‧‧‧Second rail seat

120‧‧‧Fixed fixture

130‧‧‧First fixture

140‧‧‧Second fixture

150‧‧‧ third fixture

160‧‧‧First axial stretching mechanism

170‧‧‧Second axial stretching mechanism

180‧‧‧Processing unit

X‧‧‧first axial direction

Y‧‧‧second axial

Claims (17)

A circuit board clamping and stretching device includes: a base comprising a set of slide rails in a first axial direction and a set of rail mounts in a second axial direction, the set of rail mounts being disposed in parallel to the set Between the slide rails; a fixing fixture, a first clamp, a second clamp and a third clamp are disposed on the set of rail seats for holding a circuit board, wherein the first clamp and the second clamp Positioned at two opposite corners of the circuit board, the fixing fixture and the third fixture are located at two opposite positions of the circuit board; a first axial stretching mechanism for controlling the first fixture and The third clamp stretches the circuit board toward the first axial direction; a second axial stretching mechanism for controlling the second clamp and the third clamp to stretch the circuit board toward the second axial direction; a processing unit, configured to receive a tensile information for determining whether the circuit board is stretched in the first axial direction and the second axial direction or the force of stretching the circuit board exceeds a set value; Wherein the first jig, the second jig and the third jig are adjusted according to the stretching information The circuit board is stretched area range. The circuit board clamping and stretching device of claim 1, wherein the circuit board is stretched to a distance less than or equal to a size of the circuit board in the first axial direction and the second axial direction. 0.3%. The circuit board clamping and stretching device of claim 1, wherein the processing unit further determines whether the force of stretching the circuit board exceeds when the distance that the circuit board is stretched does not exceed the set value The set value. A circuit board clamping and stretching device according to claim 3, wherein The force for stretching the board is set to be less than or equal to 2 kg per unit area. The circuit board clamping and stretching device of claim 1, wherein the circuit board is stretched beyond a set value or the force of stretching the circuit board exceeds the set value, and the first An axial stretching mechanism and the second axial stretching mechanism for fixing the tensile force and the stretching position of the first clamp, the second clamp, and the third clamp. The circuit board clamping and stretching device of claim 1, wherein the first jig, the second jig and the third jig respectively have a movable seat body, a telescopic member and a clamping The telescopic member is disposed on the movable base body and drives the clamping member to rotate relative to a rotating shaft to fasten the clamping member to the circuit board or release the buckle from the circuit board. Hehe. The circuit board clamping and stretching device of claim 6, wherein the telescopic member is a pneumatic component or a hydraulic component. The circuit board clamping and stretching device of claim 1, wherein the first axial stretching mechanism is a pneumatic component or a hydraulic component, and the first clamp and the third clamp are respectively connected by a connecting member. The movable seat body, and controlling the stretching distance and the tensile force of the first jig and the third jig by air pressure or hydraulic pressure, and feeding the stretching information to the processing unit for judging the circuit board Whether the distance stretched in the first axial direction and the force stretched on the board exceed the set value. The circuit board clamping and stretching device of claim 8, wherein the first axial stretching mechanism has a movable rod body for driving the connecting member, and according to the movable rod body The moving distance and the force required to be pushed control the stretching distance and tensile force of the first jig and the third jig. The circuit board clamping and stretching device according to claim 1 of the patent application scope, Wherein the second axial stretching mechanism is a pneumatic component or a hydraulic component, and the second clamping device and the movable body of the third clamping device are respectively connected by a connecting member, and the second clamping device is controlled by air pressure or hydraulic pressure. a stretching distance and a tensile force of the third jig, and feeding the stretching information to the processing unit for determining a distance that the circuit board is stretched in the second axial direction and a force for stretching the circuit board Whether the set value is exceeded. The circuit board clamping and stretching device of claim 10, wherein the second axial stretching mechanism has a movable rod body for driving the connecting member, and according to the movable rod body The moving distance and the force required to be pushed control the stretching distance and tensile force of the second jig and the third jig. A method for controlling clamping and stretching of a circuit board, comprising: providing a fixing fixture, a first fixture, a second fixture and a third fixture to clamp a circuit board, wherein the first fixture and the second fixture Positioned at two opposite corners of the circuit board, the fixing fixture and the third fixture are located at two opposite positions of the circuit board; controlling the first clamp and the third clamp to stretch toward a first axial direction The circuit board; controlling the second clamp and the third clamp to stretch the circuit board toward a second axial direction; and receiving a tensile information for determining the circuit board in the first axial direction and the second axial direction Whether the stretched distance and the force of stretching the circuit board exceed a set value; wherein the first jig, the second jig, and the third jig adjust the stretched area of the circuit board according to the stretching information range. The control method of claim 12, wherein the circuit board is stretched to a distance less than or equal to the circuit board in the first axial direction and the first 0.3% of the dimension on the two axes. The control method of claim 12, wherein when the distance that the board is stretched does not exceed the set value, it is further determined whether the force of stretching the board exceeds the set value. The control method of claim 14, wherein the force of stretching the board is set to be less than or equal to 2 kg per unit area. The control method of claim 12, wherein the circuit board is stretched beyond a set value exceeding the set value, and the tensile force of the first jig, the second jig, and the third jig is fixed. And stretching position. The control method of claim 12, wherein the tensile force of the circuit board exceeds the set value, and the tensile force and the tensile position of the first jig, the second jig, and the third jig are fixed. .