CN111715819B

CN111715819B - Apparatus for cutting leads of radial electronic devices

Info

Publication number: CN111715819B
Application number: CN202010199673.XA
Authority: CN
Inventors: S·瓦柳斯; K·萨沃莱宁; P·库奥斯马宁; P·海尔凯莱; J·坎特拉; V·梅凯莱; H·海基宁; P·努门佩
Original assignee: Salcomp Oyj
Current assignee: Salcomp Oyj
Priority date: 2019-03-20
Filing date: 2020-03-20
Publication date: 2023-03-28
Anticipated expiration: 2040-03-20
Also published as: CN111715819A

Abstract

The invention provides an apparatus (100) for cutting leads (203, 204) of radial electronics (201). The device (100) comprises two cutting blades (101, 102) that can be moved relative to each other. One of the cutting blades (101) comprises two grooves (103, 105) having cutting edges (104, 106). The other cutting blade (102) comprises two projections (107, 108) for pressing the leads (203, 204) of the radial electronic device (201) against the cutting edges (104, 106). The protruding portions (107, 108) are provided with recesses (109, 110) for accommodating leads (203, 204) of the radial electronic device (201).

Description

Apparatus for cutting leads of radial electronic devices

Technical Field

The present invention relates to an apparatus for cutting a lead (lead) of a radial electronic component. The invention also relates to a feeder for feeding radial electronics.

Background

Various devices for cutting the leads of radial electronics are known in the prior art. An example of such a cutting device comprises two movable cutting blades between which the leads of the radial electronics are placed. The cutting of the wire is accomplished by moving the cutting blades relative to each other. One of the cutting blades includes two slots for receiving the projecting portions of the other cutting blade. When the cutting blades are moved towards each other, the protruding portions press the leads of the radial electronic device against the cutting edge of the slot. As the cutting blades move closer to each other, the protruding portion protrudes into the (projection into) groove, whereby the cutting blades cut the lead.

A problem associated with the known cutting device is that it cannot cut correctly. After cutting, the ends of the leads are deformed, making it possible to make it difficult to mount the radial electronics on the circuit board. Another problem associated with the known cutting device is that a separate calibration tool has to be used to align the leads of the radial electronics to the correct position with respect to the cutting blade.

Object of the Invention

The main object of the present invention is to reduce or even eliminate the above mentioned prior art problems.

The invention aims to provide a device for cutting a lead of a radial electronic device. In more detail, it is an object of the present invention to provide a cutting apparatus capable of easily and accurately cutting a lead wire of a radial electronic device without using a separate calibration tool to align the lead wire of the radial electronic device to a correct position with respect to the cutting apparatus.

In order to achieve the above object, features of the device according to the invention are presented and described herein.

Disclosure of Invention

The apparatus for cutting leads of radial electronic devices according to the present invention comprises: a first cutting blade comprising a first flute having a first cutting edge and a second flute having a second cutting edge; a second cutting blade including a first protruding portion for pressing the first lead of the radial electronic device against the first cutting edge and a second protruding portion for pressing the second lead of the radial electronic device against the second cutting edge; and a moving device for moving the first cutting blade and the second cutting blade relative to each other. In the device according to the invention, the first protruding part comprises a first recess for receiving a first lead of the radial electronic device and the second protruding part comprises a second recess for receiving a second lead of the radial electronic device.

The cutting device according to the invention is used for cutting leads of radial electronic devices. Radial electronics refers to electronics having leads that protrude substantially parallel (side-by-side) from the same end of the device body, rather than from opposite ends of the device body. The radial electronics typically include two lead wires, but alternatively the radial electronics may include three, four, five, or more than five lead wires. When mounted on a circuit board, the radial electronics are typically erected perpendicularly from the circuit board. The parallel leads protruding from the single mounting surface give the radial electronics an integral plug-in property, facilitating the use of the radial electronics in high speed automated device mounting equipment. Examples of radial electronics are resistors, capacitors and inductors.

The cutting device according to the invention comprises two cutting blades which are movable relative to each other. The cutting blade is movable between an open position (in which the projection is outside the slot) and a closed position (in which the projection is in the slot). When the cutting blades are in the open position, leads of the radial electronics can be placed between the cutting blades. The cutting of the wire is accomplished by moving the cutting blade to the closed position. When the cutting blades are moved from the open position to the closed position, first, the protruding portions press the leads of the radial electronic device against the cutting edges of the slots, and then, as the cutting blades are moved closer to each other, the protruding portions protrude into the slots, whereby the cutting edges cut the leads.

The cutting device according to the invention comprises a groove on the protruding means. The purpose of the recess is to receive and retain the leads of the radial electronic device during the cutting process. The groove is preferably formed on the outer end of the protruding portion, and is arranged in the following manner: the longitudinal direction of the groove is substantially perpendicular to the direction of movement of the cutting blade. Because of the presence of the groove, no separate calibration tool is required for aligning the leads of the radial electronics to the correct position with respect to the cutting blade.

The cutting blades may be substantially planar and may be arranged to be movable relative to each other in the same plane. The moving device may be configured to linearly move the cutting blades toward or away from each other. The cutting blades are preferably made of a metal alloy, such as stainless steel and tempered tool steel.

The first projection is sized to fit into the first slot and the second projection is sized to fit into the second slot. Preferably, the projections and the corresponding grooves have substantially the same cross-sectional shape, so that the projections can project into the grooves in the following manner: the surface of the projection abuts against a corresponding surface of the groove. The cross-sectional shape of the projections and corresponding slots is preferably quadrilateral. Preferably, the cross-sectional shapes of the protruding portions and the corresponding grooves are such that the leads of the radial electronic device can be obliquely cut by the cutting edges of the grooves. The cutting edge is one of the leading edges of the slot, i.e. the edge closest to the projection when the cutting blade is in the open position. The length of the protruding portion may be, for example, 2mm to 10mm. The length of the groove may be, for example, 3mm to 12mm. The width of the projections and grooves may be, for example, 1.5mm to 5mm.

The cutting apparatus according to the present invention may be used to cut leads of radial electronic devices that are individual devices or devices attached to a device tape. On the device tape, radial electronic devices are arranged in series. Lead spacing (lead spacing) and device pitch on the device tape may vary depending on the electronic device used. The radial electronics are attached to the device strap at its leads. The component tape may be wound on a reel or packaged in a cassette from which the radial electronic components are sequentially fed to a cutting apparatus for separating one component at a time from the component tape. The device tape may include evenly spaced registration holes (exit holes, sprocket holes) that may be used to feed the device tape to the cutting apparatus. The pitch of the registration holes may vary but is preferably equal to the pitch of the devices. The device tape may be, for example, a perforated paper tape.

An advantage of the cutting device according to the invention is that the leads of radial electronics can be cut easily and accurately. After cutting, the end of the lead is not deformed, whereby the radial electronic device can be easily mounted on the circuit board. Another advantage of the cutting device according to the invention is that due to the recess on the protruding part no separate calibration tool is needed to align the leads of the radial electronics in the correct position with respect to the cutting blade.

According to an embodiment of the invention, the first cutting edge and the second cutting edge are angled with respect to the longitudinal direction of the first groove and the second groove. Therefore, the lead of the radial electronic device is obliquely (obliquely) cut. This means that the wire is cut at an angle relative to the lateral direction of the wire (cross direction). In other words, the wire is cut in the following manner: the cut surface of the wire is beveled (enclosed). The orientation of the first cutting edge and the second cutting edge with respect to the longitudinal direction of the first groove and the second groove may be such that the cutting surfaces of the leads point in the same direction, or they point towards or away from each other. The cutting surfaces are directed toward each other, meaning that the ends of the leads are inclined inward (levelled). The cutting surfaces being away from each other means that the ends of the leads are inclined outwardly.

According to an embodiment of the invention, the angle between the cutting edge and the longitudinal direction of the groove is between 20 and 70 degrees. This range means that the leads of the radial electronic device are then cut at an angle of 20 to 70 degrees relative to the longitudinal axis of the lead. This range has been found to be preferred because it facilitates mounting of radial electronics on a circuit board. The angle between the cutting edge and the longitudinal direction of the groove is preferably between 30 and 60 degrees.

According to an embodiment of the invention, the first groove and the second groove are V-shaped. The V-shaped groove facilitates the placement of the leads of the radial electronic device into the groove. The opening angle of the V-shaped groove may be, for example, 45 to 135 degrees or preferably 60 to 120 degrees.

According to an embodiment of the invention, the bottom of the first and second grooves is circular. The radius of the groove bottom may be, for example, 0.2mm to 1.0mm. Preferably, the radius of the groove bottom is substantially the same as the radius of the leads of the radial electronic device. The rounded bottom of the groove improves the cutting effect since the wire is uniformly supported to the surface of the groove during the cutting process.

According to an embodiment of the invention, the longitudinal direction of the first and second grooves is perpendicular to the direction in which the first and second cutting blades move relative to each other. In other words, the longitudinal direction of the first and second grooves is perpendicular to the moving direction of the first and second cutting blades.

According to an embodiment of the present invention, the first groove is formed at an outer end of the first projection, and the second groove is formed at an outer end of the second projection.

According to an embodiment of the invention, the distance between the first groove and the second groove is in the range of 1.5mm to 15 mm. The distance between the first recess and the second recess is selected according to the lead spacing of the radial electronic device.

According to an embodiment of the invention, the first cutting blade and the second cutting blade are substantially planar, and the moving means is configured to move the first cutting blade and the second cutting blade in the same plane with respect to each other. Preferably, the moving means is configured to linearly move the first and second cutting blades toward and away from each other between the open position and the closed position. The first and second cutting blades may be rectangular plates. The length of the cutting blade may be, for example, 5mm to 50mm. The width of the cutting blade may be, for example, 5mm to 25mm. The thickness of the cutting blade may be, for example, 2mm to 8mm. Preferably, the groove is provided on one edge of the first cutting blade, and the protrusion is provided on one edge of the second cutting blade.

According to an embodiment of the invention, the moving means comprises one or more actuators attached to the first cutting blade and/or the second cutting blade. The actuator may be, for example, a pneumatic cylinder or an electromagnetic cylinder. The one or more actuators are configured to move the first cutting blade and the second cutting blade back and forth relative to each other in a direction of movement. Depending on the application, one of the cutting blades may be fixed while the other is movable, or both cutting blades may be movable.

The invention also relates to a feeder for feeding radial electronic components. The feeder according to the invention comprises an apparatus for cutting leads of radial electronic devices according to the invention. In the feeder, radial electronic components are supplied to a cutting apparatus to separate one component at a time from a tape of components.

The feeder according to the present invention may be used in an electronic component mounting apparatus for supplying radial electronic components to a pickup apparatus which mounts the radial electronic components on a circuit board one at a time. The radial electronic device is mounted to the circuit board by inserting the ends of the leads into holes in the circuit board and by pressing the device body towards the circuit board. The ends of the leads extending through the circuit board are soldered to the circuit pattern on the surface of the circuit board.

The exemplary embodiments of the invention presented herein should not be construed as limiting the applicability of the appended claims. The verb "to comprise" is used in this document as an open limitation, i.e. does not exclude the presence of further unrecited features. The features recited in the dependent claims can be freely combined with each other, unless explicitly stated otherwise.

Drawings

FIGS. 1A-1B illustrate a cutting apparatus according to an embodiment of the present invention;

FIGS. 2A-2C illustrate cutting of leads of radial electronics using the cutting apparatus of FIGS. 1A-1B; and

figure 3 shows a feeder according to an embodiment of the present invention.

Detailed Description

In different embodiments, the same or similar components are provided with the same reference numerals.

Fig. 1A to 1B illustrate a cutting apparatus for cutting a lead of a radial electronic device according to an embodiment of the present invention. The cutting apparatus 100 includes a first cutting blade 101 and a second cutting blade 102 between which leads of radial electronics (not shown in fig. 1A-1B) may be placed. The cutting of the wire is achieved by moving the second cutting blade 102 relative to the first cutting blade 101.

The first cutting blade 101 includes a first groove 103 having a first cutting edge 104 and a second groove 105 having a second cutting edge 106. The second cutting blade 102 comprises a first protrusion 107 for pressing the first lead of the radial electronic device against the first cutting edge 104 and a second protrusion 108 for pressing the second lead of the radial electronic device against the second cutting edge 106. The first protrusion 107 and the second protrusion 108 are dimensioned to fit into the first slot 103 and the second slot 105, respectively.

The first protruding part 107 comprises a first recess 109 for receiving a first lead of a radial electronic device and the second protruding part 108 comprises a second recess 110 for receiving a second lead of a radial electronic device. The

grooves

109 and 110 may retain leads of radial electronics during the dicing process. A first groove 109 and a second groove 110 are formed on the outer end of the first projection 107 and the outer end of the second projection 108, respectively. The

grooves

109 and 110 are arranged in the following manner: their longitudinal direction is substantially perpendicular to the direction in which the second cutting blade 102 moves relative to the first cutting blade 101.

Grooves

109 and 110 are V-shaped and their groove bottoms are circular. The radius of the bottom of the groove is substantially the same as the radius of the leads of the radial electronic device.

The cutting edges 104 and 106 are angled relative to the longitudinal direction of the

grooves

109 and 110. Accordingly, the cutting apparatus 100 cuts the lead of the radial electronic device obliquely. The orientation of the cutting edges 104 and 106 with respect to the longitudinal direction of the

grooves

109 and 110 is such that the cutting surfaces of the leads point in the same direction.

The first cutting blade 101 is attached to the first fixed base 111. The second cutting blade 102 is attached to a linear actuator 112, which is attached to a second fixed base 113. The linear actuator 112 allows the second cutting blade 102 to move linearly toward and away from the first cutting blade 101 and in the same plane as the first cutting blade 101.

The first cutting blade 101 and the second cutting blade 102 are movable between an open position and a closed position. In the open position, the first projection 107 is located outside the first slot 103 and the second projection 108 is located outside the second slot 105. In the closed position, the first protrusion 107 is located in the first slot 103 and the second protrusion 108 is located in the second slot 105. When the cutting blade 101 and the cutting blade 102 are in the open position, the leads of the radial electronics can be placed between the cutting blade 101 and the cutting blade 102. Cutting of the wire is achieved by moving the

cutting blades

101 and 102 to the closed position. When the cutting blade 101 and the cutting blade 102 are moved from the open position to the closed position, first, the protruding portions 107 and the protruding portions 108 press the leads of the radial electronic devices against the cutting

edges

104 and 106, and then, as the cutting blade 101 and the cutting blade 102 are moved closer to each other, the protruding portions 107 and the protruding portions 108 protrude into the

grooves

103 and 105, whereby the cutting edges 104 and the cutting edges 106 cut the leads.

Fig. 2A to 2C illustrate cutting of leads of radial electronic devices using the cutting apparatus of fig. 1A to 1B. The device body of the processed radial electronic device 201 is shown at a glance in fig. 2A-2C.

In fig. 2A, the first cutting blade 101 and the second cutting blade 102 are in the open position. Radial electronics 201 attached to the device strap 202 are placed between the first cutting blade 101 and the second cutting blade 102. The radial electronics 201 are placed as follows: the first lead 203 of the radial electronic device 201 is adjacent to the first slot 103 and the second lead 204 of the radial electronic device 201 is adjacent to the second slot 105 of the first cutting blade 101.

In fig. 2B, the second cutting blade 102 has moved closer to the first cutting blade 101. The first and

second leads

203, 204 of the radial electronic device 201 are received into the first and

second recesses

109, 110, respectively. In fig. 2B, the first protrusion 107 presses the first lead 203 against the first cutting edge 104, and the second protrusion 108 presses the second lead 204 against the second cutting edge 106.

In fig. 2C, the first cutting blade 101 and the second cutting blade 102 have been moved to the closed position. The first projection 107 and the second projection 108 have been inserted into the first slot 103 and the second slot 105, respectively. Thus, the first lead 203 of the radial electronic device 201 has been cut by the first cutting edge 104, and the second lead 204 of the radial electronic device 201 has been cut by the second cutting edge 106.

Figure 3 shows a feeder for feeding radial electronics according to an embodiment of the invention. A plurality of radial electronic devices 201 are attached at their

leads

203 and 204 to a device tape 202 from which the radial electronic devices 201 are separated one device at a time using a dicing apparatus 100 corresponding to the dicing apparatus of fig. 1A-1B. The device tape 202 is fed to the cutting apparatus 100 using an actuator 301 which moves the device tape 202 towards the cutting apparatus 100 using evenly spaced locating holes 302 of the device tape 202. The pitch of the locating holes 302 is equal to the pitch of the radial electronics 201 on the device tape 202. Feeder 300 includes two

guide plates

303 and 304 between which device tape 202 is guided to cutting apparatus 100.

In which only advantageous exemplary embodiments of the invention are described. It is obvious to the person skilled in the art that the invention is not limited solely to the examples given above, but that it may be varied within the limits of the claims presented. Some possible embodiments of the invention are described in the dependent claims and they should not be considered as limiting the scope of protection of the invention.

Claims

1. An apparatus for cutting leads of radial electronics, comprising:

-a first cutting blade comprising a first flute having a first cutting edge and a second flute having a second cutting edge;

-a second cutting blade comprising a first protruding portion for pressing a first lead of the radial electronic device against the first cutting edge and a second protruding portion for pressing a second lead of the radial electronic device against the second cutting edge; and

-moving means for moving the first and second cutting blades relative to each other,

wherein the first projection includes a first recess for receiving a first lead of the radial electronic device and the second projection includes a second recess for receiving a second lead of the radial electronic device.

2. The apparatus of claim 1, wherein the first cutting edge and the second cutting edge are angled relative to a longitudinal direction of the first groove and the second groove.

3. The apparatus of claim 2, wherein the angle is between 20 degrees and 70 degrees.

4. The apparatus of any one of the preceding claims, wherein the first and second grooves are V-shaped.

5. The apparatus of any one of the preceding claims, wherein the bottom of the first groove and the bottom of the second groove are rounded.

6. The apparatus of any one of the preceding claims, wherein the longitudinal direction of the first and second grooves is perpendicular to the direction in which the first and second cutting blades move relative to each other.

7. The apparatus of any one of the preceding claims, wherein the first groove is formed at an outer end of the first projection and the second groove is formed at an outer end of the second projection.

8. The apparatus of any one of the preceding claims, wherein the distance between the first and second grooves is in the range of 2mm to 15 mm.

9. The apparatus of any one of the preceding claims, wherein the first and second cutting blades are substantially planar, and the moving device is configured to move the first and second cutting blades in the same plane relative to each other.

10. The apparatus of any one of the preceding claims, wherein the moving means comprises one or more actuators attached to the first and/or second cutting blades.

11. Feeder for feeding radial electronic devices, characterized in that it comprises a device for cutting the leads of radial electronic devices according to any one of the preceding claims.