CN113118290A

CN113118290A - Precise PIN bending device

Info

Publication number: CN113118290A
Application number: CN202110465854.7A
Authority: CN
Inventors: 梁世春
Original assignee: Quanxing Intelligent Control System Engineering Shanghai Co ltd
Current assignee: Quanxing Intelligent Control System Engineering Shanghai Co ltd
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2021-07-16
Anticipated expiration: 2041-04-28
Also published as: CN113118290B

Abstract

The invention provides a PIN precision bending device.A PIN material belt is transversely transmitted on the upper surface of a base, and a PIN is bent to a preset angle for multiple times by a bending mechanism; one side of the base is provided with a step which is sunken downwards, the unbent straight PIN needle is flatly placed on the upper surface of the base, and a foot of the PIN needle to be bent is suspended above the step; the bending mechanism comprises a first bending tool bit, a second bending tool bit and a third bending tool bit which are sequentially distributed in the PIN needle transmission direction, the PIN needles are sequentially bent by the first bending tool bit, the second bending tool bit and the third bending tool bit, and the PIN needle base PINs bent for three times can be maintained at required angles. This product is used for replacing traditional equipment of bending, can bend to the PIN needle fast, and the precision is high, and it is accurate to bend the angle, and is fast.

Description

Precise PIN bending device

Technical Field

The invention relates to preparation of a PIN needle, in particular to a precise PIN needle bending device.

Background

The PIN is used for the connector connection section. PIN PINs are a technical substance used to accomplish the conductive transmission of electrical signals in connectors, which are devices used to connect two active devices, transmitting current or signals. The pin assembling of the connector mainly comprises a pin and a pin detecting process. In the prior art, the PIN inserting operation of the connector requires a PIN inserting machine to insert PIN into a plastic part, thereby forming the connector.

When the PIN is processed, the conductive metal material is generally cut into a strip structure, and then the required PIN structure is punched in a punch. For the convenience of transportation and follow-up production, some clouts can generally be kept in the punching press for PIN needle can interconnect together, is PIN needle material area promptly. Fig. 1 is a schematic diagram of the PIN needle material belt before bending. When electronic components, especially various electronic connectors are manufactured, a PIN needle material belt is generally cut into single PIN needles with required shapes through a die cutting mechanism, then the single PIN needles are loaded into a movable PIN needle bearing object through a clamping jaw, and finally, a plurality of groups of PIN needles and an insulating base are assembled through the PIN needle bearing object.

Some electronic components are formed by assembling bent PIN needles and an insulating base, and the conventional assembly process of the bent PIN needles and the insulating base is that a PIN needle material belt is cut into single PIN needles through a die cutting mechanism, and then the single PIN needles are inserted into a movable PIN needle bearing object and then bent.

In the bending mechanism in the prior art, a PIN needle is bent firstly, and then a needle inserting machine is adopted to perform needle inserting operation. In the actual production process, the PIN needle after bending often cannot reach the ideal bending angle, and the reason is as follows: the PIN needle usually adopts a copper sheet with better conductivity, and the bent form can rebound under the action of the elasticity of the PIN needle due to the fact that the copper sheet of the PIN needle is thinner, so that the bent form cannot be stably maintained, and the bent angle of the PIN needle determines the conductivity and the contact after subsequent assembly. Therefore, it is necessary to design a bending mechanism capable of precisely bending the PIN and making the bending angle of the PIN to be a desired angle.

Disclosure of Invention

The invention provides a PIN precision bending device which comprises a plurality of bases and a bending mechanism, wherein a PIN material belt is transversely transmitted on the upper surfaces of the bases, and the PIN is bent to a preset angle for multiple times by the bending mechanism; wherein,

one side of the base is provided with a step which is sunken downwards, the unbent straight PIN needle is flatly placed on the upper surface of the base, and a foot of the PIN needle to be bent is suspended above the step;

the bending mechanism comprises a first bending tool bit, a second bending tool bit and a third bending tool bit which are sequentially distributed in the PIN transmission direction,

the first bending tool bit and the second bending tool bit synchronously perform lifting motion right above the corresponding base, the first bending tool bit moves downwards to drive the PIN needle foot to be bent for the first time by taking the step and the corner of the upper surface of the base as a bending point, the second bending tool bit is close to the side wall of the base and is provided with a roller, the second bending tool bit moves downwards and bends the PIN needle foot after being bent for the first time for the second time through the roller,

and the third bending tool bit is positioned at one side of the base and transversely moves into the step, and the third bending tool bit is used for performing third bending on the PIN needle base foot after the second bending.

Further, a base matched with the first bending tool bit is set as a first base, and a chamfer matched with the corner is arranged at the bottom end of the first bending tool bit;

a base matched with the second bending tool bit is set as a second base, a vertical through hole containing the step is formed in one side of the second base, the width of the vertical through hole is equivalent to the thickness of the second bending tool bit, a notch is formed in one side, close to the second base, of the bottom of the second bending tool bit, the roller is installed in the notch, when the second bending tool bit moves downwards to the maximum stroke, the bottom of the second bending tool bit is clamped in the vertical through hole, and the notch is pressed against the bending point of the PIN needle;

and a base matched with the third bending tool bit is a third base, and an included angle of 60-70 degrees is formed between the side edge of the step of the first base and the upper surface of the first base.

Further, the first bending tool bit moves downwards to drive the PIN foot to be bent for the first time to 30-60 degrees by taking the corner as a bending point;

the second bending tool bit moves downwards to bend the PIN needle bottom foot to 90 +/-5 degrees for the second time;

and horizontally moving the third bending knife to the direction of the base to bend the PIN needle bottom leg to 90 +/-2 degrees for the third time.

Further, the base is fixedly arranged on the lower die set, and the third bending tool bit is horizontally and slidably arranged on the lower die set;

the first bending cutter head and the second bending cutter head are arranged in the upper die set in a vertically sliding mode, and the upper die set is provided with a gas-liquid pressure cylinder used for synchronously driving the first bending cutter head and the second bending cutter head to move up and down.

Furthermore, the third bending cutter head is fixedly arranged at the front end of the horizontal sliding block, the adjusting mechanism arranged in the upper die set drives the horizontal sliding block to transversely slide to be close to the base,

the adjusting mechanism is provided with a vertical sliding block and a horizontal pushing block, a first inclined plane in sliding contact with the rear end of the horizontal sliding block is arranged on the front end face of the bottom of the vertical sliding block, a second inclined plane in sliding contact with the top end of the vertical sliding block is arranged on the lower surface of the front end of the horizontal pushing block, the horizontal pushing block slides forwards to abut against the vertical sliding block to enable the vertical sliding block to slide downwards, and the vertical sliding block drives the horizontal sliding block to slide forwards so that the third bending tool bit bends the PIN PIN bottom foot for the third time.

Furthermore, the vertical sliding block slides up and down in a longitudinal sliding hole in the upper module, and a limit groove is arranged at the top of the longitudinal sliding hole;

and a limiting lug in the limiting groove is fixed at the top end of the vertical sliding block.

Further, a return spring is arranged between the horizontal sliding block and the base.

Further, the adjusting mechanism is provided with a forward adjusting screw and a backward adjusting screw which are respectively used for controlling the horizontal pushing block to move forwards and backwards;

the side wall of the upper module is provided with an L-shaped fixed block, the vertical edge of the L-shaped fixed block extends downwards, the horizontal push block is an L-shaped push block, and the vertical edge of the rear end face of the L-shaped push block is positioned between the L-shaped fixed block and the side wall of the upper module;

an advancing adjusting screw penetrates through the L-shaped fixed block and abuts against the rear end face of the horizontal pushing block, and the advancing adjusting screw is in threaded fit with the first vertical edge;

the back-off adjusting screw sequentially penetrates through the L-shaped fixing block and the vertical edge of the rear end face of the horizontal pushing block and abuts against the side wall of the upper die set, a through hole for the back-off adjusting screw to penetrate through in the L-shaped fixing block is a through hole with a smooth inner wall, and the back-off adjusting screw is in threaded fit with the horizontal pushing block.

Further, the transmission device transmits the row of connected PIN needles to the bending mechanism, and the first tool bit, the second tool bit and the third tool bit of the bending mechanism sequentially bend each PIN needle;

and a cutting device is arranged on the rear side of the third bending tool bit behind the PIN needle transmission direction, the cutting device is fixedly mounted at the bottom of the gas-liquid pressure cylinder and is mounted on the upper die set in a vertically sliding manner, and the PIN needles bent for the third time are cut off by the cutting device moving downwards.

The invention carries out three times of bending treatment on the PIN needle, can keep the bottom foot of the bent PIN needle at 90 degrees,

drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a schematic diagram of a PIN needle material belt before bending and cutting;

FIG. 2 is an overall outline view of the PIN precision bending device according to the embodiment of the invention;

FIG. 3a is a partial cross-sectional view of a precision bending apparatus of the present invention, illustrating the principle of a first bend;

FIG. 3b is an enlarged view of the first bending tool tip and the first base of the base of FIG. 3 a;

FIG. 4a is a partial cross-sectional view of the precision bending apparatus of the present invention, illustrating the principle of a second bend;

FIG. 4b is an enlarged view of the second bending tool tip and the second base of the base of FIG. 4 a;

FIG. 5a is a partial cross-sectional view of the precision bending apparatus of the present invention illustrating the principle of a second bend;

FIG. 5b is a schematic view of an adjusting mechanism for driving the third bending blade to slide;

FIG. 5c is a perspective view of the third base and a horizontal slider at one side, wherein a third bending cutter head is fixed at one side of the horizontal slider close to the third base;

FIG. 6 is a bottom view of the upper die set and shows a schematic diagram of the mechanism associated with a third bend;

FIG. 7 is a top view of the lower die set;

FIG. 8 is a diagram showing the state of change of the PIN during three bending processes;

fig. 9 is a perspective view of the PIN thread strip portion after being bent and cut.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.

In the following description, for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The following detailed description of the preferred embodiments of the invention, however, the invention is capable of other embodiments in addition to those detailed.

Referring to fig. 1, the invention provides a precise PIN bending device, which comprises a plurality of bases and a bending mechanism, wherein a PIN material belt is transversely transmitted on the upper surface of each base along a specified direction, and each PIN 300 is bent to a preset angle for multiple times by the bending mechanism, so that the bent angle of each PIN 300 is as close to a right angle as possible.

One side of base is equipped with undercut's step, and the straight PIN needle of unbending is kept flat on the upper surface of base and the footing that the PIN needle was waited to buckle is unsettled in the step top. The bending mechanism comprises a first bending tool bit 101, a second bending tool bit 102 and a third bending tool bit 103 which are sequentially distributed in the PIN transmission direction. The first bending tool bit 101 and the second bending tool bit 102 synchronously perform lifting motion right above the corresponding base, the first bending tool bit 101 moves downwards to drive the PIN needle foot to be bent for the first time by taking a step and a corner on the upper surface of the base as a bending point, the side wall, close to the base, of the second bending tool bit 102 is provided with a roller 102-1, the second bending tool bit 102 moves downwards and bends the PIN needle foot bent for the first time for the second time through the roller 102-1, the third bending tool bit 103 is located on one side, close to the base, and moves transversely to the step, and the PIN needle foot bent for the second time is bent for the third time.

The invention carries out three times of bending treatment on each PIN 300, the first time directly utilizes a first bending tool bit 101 to press the corner of the step, and the PIN is firstly bent to 30-60 degrees, preferably 45 degrees; and then, second bending is carried out, the PIN is bent to 90 degrees by the roller 102-1 of the second bending tool bit 102 which is pressed downwards, but under the elastic action of the PIN base, the PIN base possibly rebounds after the second bending tool bit 102 moves upwards and returns, so that the last step of fine bending is required, and the third bending tool bit 103 which is transversely moved is used for carrying out third bending on the PIN base so as to eliminate the rebounding of the PIN base after the second bending and ensure that the PIN base is bent to 90 degrees.

In an alternative embodiment, a base matched with the first bending tool bit 101 is set as the first base 201, a step vertical edge 201-1 of the first base 201 is perpendicular to the upper surface of the first base 201, and a chamfer 101-1 matched with a corner is arranged at the bottom end of the first bending tool bit 101. When the first bending tool bit 101 is pressed down to be matched with the first base 201, the PIN is bent under the action of the chamfer 101-1.

The base matched with the second bending tool bit 102 is set as a second base 202, a vertical through hole 202-1 containing the step is formed in one side of the second base 202, the width of the vertical through hole is equivalent to the thickness of the second bending tool bit 102, a notch is formed in one side, close to the second base 202, of the bottom of the second bending tool bit 102, the roller 102-1 is installed in the notch, when the second bending tool bit 102 moves downwards to the maximum stroke, the bottom of the second bending tool bit 102 is clamped in the vertical through hole 202-1, and the notch is pressed against the bending point of the PIN needle. Different from the first base 201, the second base 202 located below the second bending tool bit 102 is provided with a closed vertical through hole 202-1 with an open top, the second bending tool bit 102 can move downwards and completely extend into the vertical through hole 202-1, and the PIN bottom is bent for the second time by the roller 102-1. In the process that the second bending tool bit 102 is contacted with the bottom of the PIN needle and is pressed downwards, the rolling roller 102-1 applies pressure to the bottom of the PIN needle and bends the bottom of the PIN needle, the bottom of the PIN needle is more uniform in hand due to the rolling pressure application mode, and in the process that the second bending tool bit 102 moves upwards, the roller 102-1 can roll the bottom of the PIN needle for the second time, so that the rebound quantity of the PIN needle is reduced.

The base for the third bending bit 103 is the third base 203, and the angle α between the step side of the first base 201 and the upper surface of the first base 201 is 60 ° -70 ° (see fig. 5c), preferably 65 °. The steps different from the first and second bases are right-angled steps, the vertical side of the step of the third base 203 is a forward inclined edge, the third bending tool bit 103 slides forwards horizontally to press the PIN bottom foot against the inclined edge of the step of the third base 203, so that the PIN bottom foot is bent to be greater than 90 degrees, as shown in 8c of fig. 8, and then the third bending tool bit 103 retracts, and the PIN bottom foot rebounds under the material property, so that the final angle can be maintained at 90 degrees.

As shown in fig. 3a-3b, the first bending tool bit 101 moves downward to bend the PIN foot to 30 ° to 60 °, preferably 45 °, for the first time with the corner as a bending point. As shown in fig. 4a-4b, the downward movement of second bending tool tip 102 causes a second bending of the PIN base to 90 ° ± 5 °. As shown in fig. 5a-5b, the third bending knife horizontally moves towards the base to bend the bottom PIN of the PIN needle to 90 degrees +/-2 degrees for the third time.

In an alternative embodiment, the base is fixedly mounted on the lower die set 200, and the third bending tool bit 103 is horizontally slidably mounted on the lower die set 200; the first bending tool bit 101 and the second bending tool bit 102 are both mounted in the upper module 100 in a vertically sliding manner, and the upper module 100 is provided with a gas-liquid pressure cylinder 120 for synchronously driving the first bending tool bit and the second bending tool bit to move vertically.

In an alternative embodiment, the third bending tool bit 103 is fixedly installed at the front end of the horizontal slider 104, and the horizontal slider 104 is driven by an adjusting mechanism arranged in the upper die set 100 to slide laterally to be close to the base. The adjusting mechanism is provided with a vertical sliding block 105 and a horizontal pushing block 106, a first inclined plane in sliding contact with the rear end of the horizontal sliding block 104 is arranged on the front end face of the bottom of the vertical sliding block 105, a second inclined plane in sliding contact with the top end of the vertical sliding block 105 is arranged on the lower surface of the front end of the horizontal pushing block 106, the horizontal pushing block 106 slides forwards horizontally to abut against the vertical sliding block 105 to enable the vertical sliding block 105 to slide downwards, and the vertical sliding block 105 drives the horizontal sliding block 104 to slide forwards so that the third bending tool bit 103 bends the bottom PIN of the PIN needle for the third time. The principle of the adjustment mechanism causing the horizontal slider 104 to slide is shown in fig. 5 b.

In an alternative embodiment, the vertical sliding block 105 slides up and down in a longitudinal sliding hole in the upper module 100, and a limit groove is arranged at the top of the longitudinal sliding hole; the top end of the vertical sliding block 105 is fixed with a limit lug 105-1 positioned in the limit groove. The limit lug 105-1 slides in the limit groove, and the maximum sliding stroke of the vertical slide block 105 is limited by the matching of the limit groove and the limit lug 105-1.

In an alternative embodiment, as shown in fig. 5b, the adjusting mechanism is configured with an advancing adjusting screw 108 and a retracting adjusting screw 109 for controlling the horizontal pushing block 106 to advance and retract, respectively; an L-shaped fixing block 107 is arranged on the side wall of the upper die set 100, the vertical edge of the L-shaped fixing block 107 extends downwards, the horizontal push block 106 is an L-shaped push block, and the vertical edge of the rear end face of the L-shaped push block is located between the L-shaped fixing block 107 and the side wall of the upper die set 100. An advancing adjusting screw 108 penetrates through the L-shaped fixing block 107 and abuts against the rear end face of the horizontal pushing block 106, and the advancing adjusting screw 108 is in threaded fit with the first vertical edge.

When the third bending tool bit 103 is needed to bend the PIN bottom for the third time, the adjusting mechanism needs to be controlled to drive the horizontal sliding block 104 to slide forward, and the forward adjusting screw 108 is manually or mechanically screwed, so that the forward adjusting screw 108 moves forward to abut against the L-shaped horizontal pushing block 106 to move forward. The backset adjusting screw 109 sequentially penetrates through the vertical edges of the rear end surfaces of the L-shaped fixing block 107 and the horizontal pushing block 106 and abuts against the side wall of the upper module 100, a through hole for the backset adjusting screw 109 to penetrate through in the L-shaped fixing block 107 is a through hole with a smooth inner wall, and the backset adjusting screw 109 is in threaded fit with the horizontal pushing block 106. When the horizontal pushing block 106 needs to be retracted, the retraction adjusting screw 109 can be loosened manually or mechanically.

In other embodiments, the forward adjusting screw 108 and the backward adjusting screw 109 can be replaced by telescopic rods controlled by a PLC to automatically control the horizontal pushing block 106 to move forward and backward.

In an alternative embodiment, a return spring 110 is provided between the horizontal slider 104 and the third base 203. When the horizontal pushing block 106 loses the forward pushing force, the horizontal sliding block 104 can be retracted and the vertical sliding block 105 can move upwards under the action of the return spring 110, so as to prepare for bending the third bending tool bit 103 at the next time.

In an alternative embodiment, a row of PIN PINs connected together is conveyed to the bending mechanism by the conveying device, and each PIN is bent in sequence by the first, second and third cutting heads of the bending mechanism. A cutting device 130 is arranged behind the third bending tool bit 103 in the rear direction of the PIN transfer direction, the cutting device 130 is fixedly mounted at the bottom of the gas-liquid pressurizing cylinder 120 and is mounted on the upper die set 100 in a vertically sliding manner, the PIN PINs bent for the third time are cut by the cutting device moving downwards, and the cut PIN PINs are as shown in fig. 9.

The above description is of the preferred embodiment of the invention. It is to be understood that the invention is not limited to the particular embodiments described above, in that devices and structures not described in detail are understood to be implemented in a manner common in the art; those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or modify equivalent embodiments to equivalent variations, without departing from the spirit of the invention, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.

Claims

1. A PIN needle precision bending device is characterized by comprising a row of bases and a bending mechanism, wherein a PIN needle material belt is transversely transmitted on the upper surfaces of the bases, and each PIN needle is bent to a preset angle for multiple times by the bending mechanism; wherein,

2. The precise PIN bending device according to claim 1, wherein a base matched with the first bending tool bit is provided as the first base, and a chamfer matched with the corner is provided at the bottom end of the first bending tool bit;

3. The PIN precision bending apparatus according to claim 1,

the first bending tool bit moves downwards to drive the PIN foot to be bent for the first time to 30-60 degrees by taking the corner as a bending point;

4. The precise PIN bending device according to claim 2, wherein the base is fixedly mounted on a lower die set, and the third bending tool bit is horizontally slidably mounted on the lower die set;

5. The PIN precision bending device according to claim 4, wherein the third bending cutter head is fixedly arranged at the front end of the horizontal slider, the horizontal slider is driven by an adjusting mechanism arranged in the upper die set to slide transversely to be close to the third base,

6. The precise PIN bending device according to claim 5, wherein the vertical slide block slides up and down in a longitudinal slide hole in the upper module, and a limit groove is formed at the top of the longitudinal slide hole;

7. The PIN precision bending apparatus according to claim 5, wherein a return spring is provided between the horizontal slider and the base.

8. The PIN precision bending device according to claim 7, wherein the adjusting mechanism is provided with an advancing adjusting screw and a retreating adjusting screw for controlling the horizontal pushing block to advance and retreat, respectively;

9. The precise PIN bending device according to claim 4, wherein a row of connected PINs are transferred to the bending mechanism by the transfer device, and each PIN is bent in sequence by the first, second and third tool bits of the bending mechanism;