TWI411482B - Seam welding unit, seam welding device - Google Patents

Abstract

The subject is to enable an easy procedure in replacing a seam welding roller and increases the operation efficiency of a seam welding device. The solution comprises: a seam welding roller unit 30, a welding roller 32 that is used in seam welding, a shell body 36 of the welding roller 32 which can rotate freely, a cylindrical shaped region 42 that is concentric with the welding roller 32 that is located on the outside of the shell body 36, and a sectional part 46 that for positioning use along the direction of an axis. To perform positioned welding roller 32, put the cylindrical shaped region 42 and the sectional part 46 against the seam welding device body while the shell body 36 is disengaged, but still attached, from the seam welding main body.

Description

Seam welding roller unit, seam welding device

The present invention relates to a welding roll used in seam welding, and more particularly to a technique for replacing the welding roll.

Conventionally, a seam welding device is used as a means for soldering an electronic component package or a cover such as a crystal oscillator or a semiconductor element. The seam welding device is provided with a pair of welding rolls, which are pressed to the contact portion of the electronic component package and the cover. When a pulse voltage is applied to a pair of welding rolls, a current flows between the electronic component package and the cover, so that the current is caused to be seam welded.

The structure of the welded joint of the seam welding which is generally used is shown in Fig. 8. Each of the pair of welding heads 80 includes a roller shaft 82, a welding roller 84 that is fixed to the front end of the roller shaft 82 in a coaxial state by a screw 82A, and a machine that rotatably holds the roller shaft 82 by a bearing 85. Shell 85. Each of the welding heads 80 holds the casing 85 in a floating state by a vertical slider 86 that is movably guided in the vertical direction. Since the vertical slider 86 is loaded with a spring pushing means such as a spring (not shown), the welding roller 84 can be pressed against the electronic component package or the like with a predetermined load. The left and right welding heads 80 are independent and can be moved up and down to deform the electronic component package, or an error occurs in the electronic component package in a fixed state, and the welding rollers 84 can be individually moved up and down to absorb errors. . The upper ends of the left and right vertical sliders 86 are held by the horizontal sliders 88. Therefore, the relative distance between the left and right welding rolls 84 can be freely adjusted by the horizontal slider 88. Including welding The head 80, the vertical slider 86 and the horizontal slider 88 are integrally moved up and down by the base slider 90.

The welding roller 84 is gradually consumed by the load and heat generated during seam welding. If the welding roller 84 is deformed by the consumption, it is easy to invent the sealing failure. Further, the deformation of the welding roller 84 deteriorates the appearance of the electronic component package after seam welding. In order to avoid such troubles, the welding roller 84 must be periodically replaced. The frequency of replacement varies depending on the size or welding conditions of the electronic components, but is generally performed for thousands to tens of thousands of electronic components per solder.

However, the conventional welding head portion 80 has a pair of welding rolls 84 facing each other in a very close state, and the wrench for loosening the screw 82A of the fixing welding roll 84 cannot be inserted into the gap between the welding rolls 84. Therefore, it is necessary to remove the entire welding head 80 and then loosen the screw to remove the welding roller 84 from the roller shaft 82.

Further, when the welded head 80 to be removed is to be attached to the body of the seam welding apparatus, high mounting accuracy is required. As a result, there is a problem that the welding head 80 is loaded and unloaded, or the subsequent adjustment position takes time and disadvantages. In the replacement work of the welding roller 84, the seam welding device is stopped, which is a factor that reduces the operation rate and increases the welding cost.

Further, since it is necessary to use the replacement work of the worker every certain period of time, the problem of unmanned operation for a long period of time cannot be performed.

The present invention has been made in view of the above problems, and provides easy welding. The method of replacing the roller and improving the operation efficiency of the seam welding device is aimed at.

In order to achieve the above object, the present invention provides a sewing roll unit comprising: a welding roll used for seam welding of a seam welding apparatus; and a casing for rotatably holding the welding roll, in the casing a cylindrical shape region coaxial with the welding roller and a positioning step portion for positioning in the axial direction are formed on the outer circumference, and the cylindrical shape is formed by being detachably held by the main body of the seam welding device The field and the positioning stage portion are in contact with the seam welding device body to position the welding roller.

According to the present invention, the casing is detachably attached to the body of the seam welding device, and the cylindrical shape field and the positioning phase portion are utilized, and the body can be positioned with high precision. The cylindrical shape field of the casing can be used when positioning in the direction of the vertical plane of the rotating shaft. The positioning phase portion can be used when positioning in the axial direction. As a result, the entire seam welding roller unit including the casing can be replaced quickly and with high precision. As described above, by independently welding the welding roll unit from the main body, it is possible to perform the replacement or positioning operation of the welding roll for the casing in a place away from the seam welding device, and thus the adjustment work is also easy.

According to the above aspect of the invention, the positioning step portion of the casing includes a pair of inclined surfaces extending in the circumferential direction, and the inclined surface is abutted on the main body side protrusion of the seam welding device to be positioned in the axial direction. The above welding roller is preferred.

In this manner, the movement of the casing in the axial direction can be easily regulated by the pair of inclined faces. In particular, by extending the inclined surface in the circumferential direction, it is not necessary to rely on the circumferential direction of the casing, and the axial direction can be constantly performed. Positioning.

Further, in the above-described invention, it is preferable that the groove for the positioning of the casing is formed in a circumferential direction in which the cross-sectional shape is approximately trapezoidal. According to this configuration, the insertion of the groove into the main body side projection makes it possible to easily position the axial direction.

Further, in the above invention, the outer shape of the casing is preferably a cylindrical shape. In this way, the operation of the casing can be easily performed.

A seam welding apparatus according to the present invention which achieves the above object, comprising: a seam welding roller unit having the above features; and a power supply unit for supplying a welding current to the welding roller of the seam welding roller unit; and loading and unloading The body side holding portion of the above-described seam welding roller unit is freely held.

Further, the seam welding apparatus is preferably provided with a transport platform for transporting the above-described seam welding roller unit to the main body side holding portion. As a result, the replacement of the seam welding roller unit is automated, and the unmanned operation can be performed for a long period of time.

Further, the main body side holding portion of the seam welding apparatus includes: a first fixing surface that abuts against the cylindrical shape region of the seam welding roller unit; and a contact with the cylindrical shape region and the first fixing surface The second fixed surface having an acute angle is preferred. In the first and second fixed surface pressing seam welding roller units, the seam welding roller unit is held by the first and second fixing surfaces, and the stability at the time of fixing can be improved.

According to the present invention, the replacement time of the welding rolls can be greatly shortened.

Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings.

Fig. 1 shows a seam welding apparatus 1 according to an embodiment of the present invention. The seam welding apparatus 1 includes a main body side holding portion 10, and a seam welding roller unit 30 that is detachably held by the main body side holding portion 10, and supplies or carries the seam welding roller unit 30 to the main body side holding portion. The transport platform 50 of 10 and the power supply unit 60 that supplies the welding current to the seam welding roller unit 30 via the main body side holding unit 10, and the welding platform 70 on which the electronic component package serving as the workpiece is mounted. Further, the welding platform 70 is integrated with the transport platform 50.

The main body side holding portion 10 includes a pair of holding block portions 12 that hold the pair of seam welding roller units 30, a vertical slider 14 that movably guides the holding block portion 12 in the vertical direction, and a vertical portion that is disposed on the left and right sides. A horizontal slider 16 at the upper end of the slider 14 and a base slider 18 for moving the horizontal slider 16 up and down.

The pair of vertical sliders 14 are mutually independent and are loaded with a spring pushing means such as a spring (not shown). Therefore, the vertical slider 14 pushes the seam welding roller unit 30 to the electronic component package or the like with a predetermined load, and independently moves the respective seam welding roller units 30 up and down. For example, when the electronic component package is deformed or an error occurs in the fixed state of the electronic component package, the respective seam welding roller units 30 are individually moved up and down to absorb the error.

The water smoothing member 16 is capable of freely adjusting the relative distance between the left and right seam welding roller units 30. Therefore, for various width electronic component packages, the position of the seam welding roller unit 30 can be aligned.

In the second drawing, the seam welding roller unit 30 is enlarged. Seam welding roller unit 30 is a welding roller 32 having a disk shape and having a welding surface inclined toward the outer circumference, and a rotating shaft 34 to which the welding roller 32 is fixed to the end by a screw 33, and a machine that rotatably holds the rotating shaft The case 36 and a stopper 38 fixed to an end portion of the rotating shaft 34 on the opposite side of the welding roll 32.

The overall shape of the casing 36 is about a cylindrical shape, and a space 40 is formed inside. Therefore, a cylindrical shape region 42 that is coaxial with the welding roller 32 is formed on the outer circumference of the casing 36. A shaft holding hole 44A is formed in each of the end faces 44 at both axial ends of the casing 36, and the rotating shaft 34 is rotatably held by the two shaft holding holes 44A. The stopper 38 of the rotary shaft 34 has a function of preventing the rotary shaft 34 from coming off the casing 36. Further, the internal space 40 of the casing 36 is filled with conductive grease.

In the cylindrical shape field 42, a positioning phase portion 46 for positioning in the axial direction is formed. Specifically, the positioning phase portion 46 is a groove that has a circumferential shape with a substantially trapezoidal cross-sectional shape. Therefore, the positioning stage portion 46 has a pair of inclined surfaces 46A that extend in the circumferential direction.

Hereinafter, the holding structure of the seam welding roller unit 30 with respect to the main body side holding portion 10 will be described with reference to FIGS. 3 and 4 .

The holding block portion 12 of the main body side holding portion 10 is formed with a first fixing surface 12A and a second fixing surface 12B, and the holding space 20 for holding the seam welding roller unit 30 is formed by these surfaces. The first fixed surface 12A faces the ground and becomes the top surface of the holding space 20. Further, the second fixing surface 12B is a side surface that forms an acute angle with the first fixing surface 12A and constitutes the holding space 20. Further, the first fixing surface 12A and the second fixing surface 12B are the seam welding roller unit 30. The rotation axis (rotation axis 34) is set in parallel. As a result, when the seam welding roller unit 30 is inserted into the internal space 20, the first fixed surface 12A and the second fixed surface 12B are brought into contact with the outer peripheral surface of the cylindrical shape region 42 of the seam welding roller unit 30.

Further, a projection 22 is formed on the peripheral wall of the holding space 20 of the holding block portion 12. Specifically, the projection 22 is constituted by the positioning rod 23 provided along the first fixing surface 12B. The positioning bar 23 is formed at a right angle to the rotation axis of the seam welding roller unit 30, that is, along the circumferential direction of the seam welding roller unit 30. In addition, the protruding dimension of the positioning rod 23 (protrusion 22) of the first fixing surface 12A coincides with the size of the concave portion of the positioning step portion (groove) 46 of the seam welding roller unit 30. As a result, as shown in FIG. 4, the projection 22 is a pair of inclined surfaces 46A that abut against the positioning stage portion 46. By the engagement of the positioning stage portion 46 and the projection 22, the seam welding roller unit 30 is positioned in the axial direction of the main body side holding portion 10.

Further, the movable block 26 is provided in the holding block portion 12. The movable arm 26 is disposed at a position opposite to the second fixed surface 12B, and is accessible or distant from the second fixed surface 12B. Therefore, the movable arm 26 is pushed toward the seam welding roller unit 30 toward the second fixed surface 12B side. Since the first fixed surface 12A and the second fixed surface 12B are set to an acute angle, the seam welding roller unit 30 is pushed up toward the first fixed surface 12A side by the elastic thrust of the movable arm 26. As a result, the positioning of the seam welding roller unit 30 in the radial direction (the direction perpendicular to the surface of the rotating shaft) is performed.

Hereinafter, an automatic replacement method of the seam welding roller unit 30 will be described.

As shown in Fig. 5, the transport platform 50 is provided with at least two loading dies 52A and 52B, and is particularly movable in the vertical direction and the horizontal direction by a platform device (not shown). The loading dies 52A, 52B are retainable seam welding roller units 30. One of the loading molds 52A is in an empty state and is used to collect the seam welding roller unit 30. The other loading die 52B is a seam welding roller unit 30 for holding the next supply.

Therefore, first, as shown in (A), one of the loading dies 52A of the transport platform 50 is placed on the plane of the seam welding roller unit 30 in use, and the movable arm 26 is moved. As a result, the seam welding roller unit 30 automatically falls while rolling the second fixing surface 12B, and is loaded on the loading mold 52A. In this state, once the transport platform 50 is lowered and the horizontal movement and the upward movement are performed, the new seam welding roller unit 30 on the loading mold 52B is housed in the holding space 20 of the holding block portion 12. In this state, the movable arm 26 is closed. As a result, the seam welding roller unit 30 gradually rises along the second fixing surface 12B and comes into contact with the first fixing surface 12A by the spring force of the movable arm 26, and is automatically positioned in the holding space 20. When the seam welding roller unit 30 is raised, the projections 22 are automatically inserted into the positioning portion 46 for the groove, and the positioning in the axial direction is simultaneously performed.

In the seam welding apparatus 1, the seam welding roller unit 30 is in a state of being detachable from the main body. Further, since the cylindrical shape region 42 and the positioning phase portion 46 are formed on the outer circumference of the casing 36, the position of the seam welding roller unit 30 can be easily and accurately adjusted while being fixed to the main body. In particular, the cylindrical shape field 46 of the casing 36 is positioned in the plane direction with respect to the vertical plane of the rotating shaft with high precision, and the positioning portion 46 of the casing 36 is further positioned. It is positioned in the axial direction with high precision. As a result, the entire seam welding roller unit 30 including the casing 36 can be mounted quickly and accurately. The separate seam welding roller unit is formed from the main body, and the welding roller 32 can be replaced with the rotating shaft 34 at a position away from the seam welding apparatus 1, so that maintenance is also easy.

Further, in the seam welding apparatus 1, as the positioning step portion 46 of the seam welding roller unit 30, a groove having a substantially trapezoidal cross section is used, and a pair of inclinations 46A are formed in the groove. As a result, the projection 22 on the main body side can be engaged, and the seam welding roller unit 30 can be positioned in the axial direction. Since the inclined surface 46A extends in the circumferential direction of the casing 36, the projection 22 and the inclined surface 46A are often automatically abutted even if the casing 36 has any state in the circumferential direction of the holding block portion 12 of the main body.

Further, since the seam welding roller unit 30 has a cylindrical outer shape as a whole of the outer shape of the casing 36, the loading mold 52A on the transport platform 50 can be made simple, and the operation at the time of replacement becomes easy.

Further, since the first fixing surface 12A and the second fixing surface 12B of the holding block portion 12 are at an acute angle, only the seam welding roller unit 30 is pressed against the first and second fixing surfaces, and the seam can be stably maintained. Welding roller unit 30. Therefore, by the movement of the movable arm 26, the fixing or opening of the seam welding roller unit 30 can be easily switched. Further, since the second fixed surface 12B is inclined in the vertical direction, the seam welding roller unit 30 smoothly rises or falls along the second fixed surface 12B as the movable arm 26 moves. Therefore, it is possible to avoid a drastic drop of the conveyance platform 50, and the like, and a smooth replacement operation can be realized.

In the present embodiment, it is shown in the circumferential direction of the casing 36. The groove function is used as the positioning phase portion 46, but the present invention is not limited thereto. For example, as shown in FIG. 6, a mountain-like projection extending in the circumferential direction is formed on the outer circumferential surface of the casing 36 of the seam welding roller unit 30, and this may be used as the positioning phase portion 46. For example, when the cross section of the projection is formed in a trapezoidal shape, a pair of inclined surfaces 46A extending in the circumferential direction are formed. Therefore, the pair of inclined surfaces 46A are brought into contact with the projections 22 on the main body side, whereby the axial direction can be easily performed. Positioning. In the seam welding roller unit 30 of the sixth embodiment, the components and members common to the seam welding roller unit 30 shown in Fig. 2 are denoted by the same reference numerals, and the detailed description thereof will be omitted.

Further, in the present embodiment, the case where the inclined surface is formed on the side of the seam welding roller unit 30 is shown, but the present invention is not limited thereto. Further, the seam welding roll unit 30 of the present embodiment is limited to the case where the entire casing 36 is in the cylindrical shape field 42, but the present invention is not limited thereto. For example, as shown in Fig. 7, the projections 22 are formed on the casing 36 side of the seam welding roller unit 30, and a pair of inclined surfaces 46A may be formed on the side of the holding block portion 12. The projection 22 formed in the casing 36 abuts on the inclined surface 46A on the side of the holding block portion 12, and the positioning in the axial direction can be performed with high precision and with ease. Further, a part of the outer peripheral surface of the casing 36 may be formed into a cylindrical shape field 42, and other portions may be formed into a non-cylindrical shape field. For example, as the non-cylindrical shape field, a polygonal field 49 such as a hexagon may be formed to be expanded in the radial direction. With this configuration, even if the seam welding roller unit 30 is directly placed on the flat conveying platform 50 or the like, rolling can be prevented by the outer peripheral surface of the polygonal field 49. Moreover, the cylindrical shape field 42 is in direct contact with the transport platform 50 or the mold to avoid the occurrence of scratches or Because of the depression, the shape accuracy of the cylindrical shape field 42 can be maintained for a long period of time.

Hereinabove, the embodiment of the seam welding apparatus and the seam welding roller unit of the present invention is shown, but the present invention is not limited thereto, and when the present invention is applied to a specific device, the gist of the present invention is not exceeded. The scope can be changed as appropriate.

The present invention can be utilized in various devices for seam welding.

1‧‧‧Stud welding device

10‧‧‧ Body side retention

12‧‧‧ Keeping the block

12A‧‧‧1st fixed surface

12B‧‧‧2nd fixed surface

22‧‧‧ Protrusion

26‧‧‧ movable arm

30‧‧‧Sewing welding roller unit

32‧‧‧welding rolls

36‧‧‧Chassis

46‧‧‧ Positioning Phase Division

46A‧‧‧Sloping surface

50‧‧‧Transport platform

Fig. 1 is a view showing the overall configuration of a seam welding apparatus according to an embodiment of the present invention.

The second (A) and second (B) drawings are enlarged views showing the seam welding roller unit provided in the same seam welding device.

Fig. 3 is a view showing a state in which the same seam welding roller unit is fixed to the apparatus main body side.

Fig. 4 is a sectional view showing the arrow IV-IV of Fig. 3;

The fifth (A) and fifth (B) drawings are diagrams showing a state in which the seam welding roller unit is automatically supplied using the transport platform.

Fig. 6 is an enlarged view showing another configuration example of the seam welding roll unit.

Fig. 7 is an enlarged view showing another configuration example of the same seam welding roller unit.

Fig. 8 is a view showing the overall configuration of a conventional seam welding apparatus.

30‧‧‧Sewing welding roller unit

32‧‧‧welding rolls

33‧‧‧ screws

34‧‧‧Rotary axis

36‧‧‧Chassis

40‧‧‧Internal space

42‧‧‧Cylindrical shape field

44A‧‧‧Axis retaining hole

46‧‧‧ Positioning Phase Division

46A‧‧‧Sloping surface

Claims (7)

A sewing roll unit comprising: a welding roll used for seam welding by a seam welding apparatus; and a casing that rotatably holds the welding roll, and the welding is formed on an outer circumference of the casing The roller has a coaxial cylindrical shape region and a positioning step portion for positioning in the axial direction. When the casing is detachably held by the main body of the seam welding device, the cylindrical shape region and the positioning phase portion are brought into contact with each other. The welding roller can be positioned in connection with the above-mentioned seam welding device body. The seam welding roller unit according to the first aspect of the invention, wherein the positioning stage portion of the casing includes a pair of inclined surfaces extending in a circumferential direction, and the inclined surface is abutted by the The main body side of the seam welding device protrudes to position the welding roller in the axial direction. The seam welding roller unit according to the first aspect of the invention, wherein the positioning step portion of the casing is formed in a circumferential direction groove having a cross-sectional shape of approximately trapezoidal. The seam welding roller unit according to the first or second aspect of the invention, wherein the outer shape of the casing is a cylindrical shape. A seam welding apparatus, comprising: the seam welding roller unit according to any one of claims 1 to 4; A welding current is supplied to the power supply unit of the welding roller of the seam welding roller unit; and the main body side holding portion of the seam welding roller unit is detachably held. The seam welding apparatus according to claim 5, further comprising a conveyance platform that conveys the seam welding roller unit to the main body side holding portion. The seam welding device according to the fifth aspect of the invention, wherein the main body side holding portion is provided with: a first fixing surface that abuts against the cylindrical shape field of the seam welding roller unit; and abutting In the above cylindrical shape field, the second fixing surface having an acute angle to the first fixing surface is used.