JPH0593673U - Cutting equipment for welding electrode tips - Google Patents

Abstract

(57) [Summary] [Objective] In order to regenerate a worn electrode tip for welding, it is possible to automatically and efficiently perform cutting while supplying each electrode tip to the cutting part one by one. [Structure] A holding member 7 for holding the electrode tips T dropped one by one from the parts feeder 3 in an inverted posture is laterally moved by a cylinder device 8, and the held electrode tips are cut and set in the inverted posture. A chip feeding means 5 for feeding to a position is provided. The support rod 12 provided above the cutting set position is attached to the tip 1 by downward movement.
An electrode tip in an inverted posture is press-fitted into and supported by 2a, and the electrode tip is provided so as to advance and descend downward after being detached from the tip feeding means 5, and is rotationally driven below the cutting set position. Cutting cutter 1
1 is provided so that the tip end surface of the electrode tip supported by the support rod (12) and advancing and descending is cut into a predetermined shape.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cutting device for cutting a tip of a tip into a predetermined shape for the purpose of recycling an electrode tip for welding in spot welding.

[0002]

[Prior Art]

 As the electrode tip for welding in the spot welding process, various shapes made of chromium copper or the like are used. For example, a tip as shown in FIG. 7 (a), which is a so-called cap tip having a substantially frusto-conical or frusto-conical tip and a hole for press-fitting support at the hip end, is used.

Even though the electrode tip (T) initially has the shape shown in FIG. 7 (a), the tip portion (T1) is worn by its use, and the tip as shown in FIG. 7 (b) is worn. The shape is distorted. When such wear or deformation occurs, problems such as changes in the welding position occur.Therefore, by cutting and shaping the tip of the worn and deformed tip to regenerate it, it is possible to extend the life of the tip. I am trying.

[0004]

[Problems to be solved by the device]

 Conventionally, as a means of cutting the welding electrode tip, generally, the worn and deformed chips are held one by one on a chuck of a lathe and cut by lathe cutting, or a tip is formed by using an ordinary drilling machine. The tip surface was cut.

Therefore, the cutting process takes time and labor, and the cost is extremely high, and the value of recycling is low.

In view of the above, the present invention can automatically and efficiently perform a cutting process for reusing and using a worn or deformed welding electrode tip while supplying each tip to the cutting portion. The present invention is intended to provide a cutting device for such an electrode tip.

[0007]

[Means for Solving the Problems]

 The present invention is a welding electrode tip cutting device that solves the above-mentioned problems. By dropping the welding electrode tip, which is the cutting target, downward one by one with the tip thereof facing downward. It includes a tip supplying means for supplying to the side of the cutting part and a holding member for holding the electrode tip dropped and supplied from the tip supplying means in an inverted posture, and this holding member is operated by a tipping means such as a cylinder device for each tip holding action. It can be moved vertically to the cutting tip position by moving the held electrode tip to the cutting set position in the inverted position, and it can be moved up and down by the driving means such as the cylinder device arranged vertically above the cutting set position. Each time the electrode tip is sent to the cutting set position, the tip is pressed into the inverted tip for downward operation to support the tip, and the tip is supported. Support rod that is separated from the feeding means and that is advanced and lowered toward the lower side of the cutting setting position, and has a vertical axis and is arranged below the cutting setting position and is rotatably driven by appropriate driving means and supported. It is characterized by comprising a cutting cutter that cuts into a predetermined shape the tip end of the electrode tip that is supported by the rod and advances and descends.

In the above-mentioned device, a pair of members, which can be opened and closed by vertical movement of the supporting rod between the cutting set position and the supporting rod above the cutting setting position, are held in a closed state when the supporting rod is in the raised position. It is preferable to provide a tip-discharging means for discharging the electrode tip removed from the support rod by ascending the support rod after cutting.

[0009]

[Action]

 According to the cutting device of the present invention having the above-mentioned structure, the welding electrode tips to be cut are dropped one by one downward from the supply means in an inverted posture with the tip facing downward, and are placed on the side of the cutting portion. Supplied. The electrode tip thus supplied is held in the inverted posture by the holding member of the tip feeding means. Then, for each holding action, the cylinder device is actuated, the holding member laterally moves, and the electrode tip is sent to the cutting set position while being held in the inverted position. At this time, since the electrode tip is not slidably rolled on the side surface, the electrode tip can be reliably fed to a position coaxial with the upper support rod at the cutting set position without causing positional displacement.

When the electrode tip is fed to the cutting set position, the support rod arranged above it is moved downward in the axial direction by the operation of the driving means such as the cylinder device, and its tip is press-fitted into the electrode chip. Then, the electrode tip is coupled to and supported by the tip (lower end). Next, the electrode tip supported at the tip by lifting the support rod, etc. is disengaged from the tip feeding means, and the tip feeding means is returned to the original position. The electrode tip is lowered to the part of the cutting cutter arranged below, and its tip is pressed against the cutting cutter.

The cutting cutter is appropriately rotated by a driving unit to cut the tip surface of the electrode tip. Normally, rotary cutting is performed for a certain period of time set by a timer according to the type of electrode tip, and the tip surface of the tip is cut into a predetermined shape and shaped.

After the cutting action, the electrode tip supported at the tip of the support rod is pulled out by the ascent of the support rod, and is recovered from the cutting set position. In particular, a chip that has a receiving member that can be opened and closed by the vertical movement of the support rod and that is held closed when the support rod is in the raised position between the cutting set position and the support rod above it. By providing the discharging means, it is possible to reliably discharge and collect the electrode tip removed from the support rod by the ascent of the support rod after cutting from the cutting set position.

In this way, the electrode tips that are sequentially supplied one by one and fed to the cutting set position can be automatically and continuously machined. In particular, the electrode tip is supplied in an inverted position and is fed to the cutting set position while being held in that inverted position for cutting the tip surface, so that the electrode tip to be cut may be worn or deformed in a distorted shape. Even if the tip has a semicircular shape or a tapered shape, a series of operations such as feeding to the cutting set position can be performed without any problem.

[0014]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings.

In FIG. 1 showing an outline of the entire apparatus, (1) is a main body including an apparatus frame, (2) is a substrate provided with a cutting portion to be described later, and (3) is arranged in an upper portion inside the apparatus main body. It is a parts feeder as a chip supply means.

The parts feeder (3) feeds the electrode chips, which are the objects to be cut, placed in the upper hopper (3a) by rotating in the hopper and aligning them in a funnel-shaped feeding path. It is sent out to the outlet (3b) and sent out and dropped below the outlet (3b). It is aligned in an upright posture, and the direction is gradually changed so that it is sent out and dropped one by one from the outlet (3b) in an inverted posture. Is configured.

Usually, when feeding from the hopper part (3a), it is divided into a machinable tip and a non-machinable tip, and only the machinable tip is dropped and supplied from the delivery port (3b). Is provided.

(4) is a drop supply chute connected to the delivery port (3b), and its lower end is located above the chip delivery means (5) arranged on the substrate (2). It is connected to the guide pipe (6) and is provided so that the electrode tip (T) delivered from the delivery port (3b) can be fed to the portion of the tip delivery means (5) by its own weight in an inverted posture.

As shown in FIGS. 1 to 5, the tip feeding means (5) has a holding hole (7a) for fitting and holding the electrode tip (T) falling from the guide pipe (6) in an inverted posture. It has a holding member (7) having. This holding member (7) is connected to a rod (8a) of a cylinder device (8), which is an advancing / retracting device, through a connecting device such as a floating joint, and the cylinder device (8) is actuated to move the cutting member to the cutting position. It is provided so as to be able to move forward and backward from the side, whereby the electrode tip (T) held in the holding hole (7a) can be sent to the cutting set position in the inverted posture. The holding member (7) is provided so as to return to its original position after supporting the electrode tip on a support rod described later. Reference numeral (9) is a guide plate for sliding the holding member (7), and reference numeral (9a) is a stopper for positioning when returning.

A sensor is provided at a portion of the delivery port (3b) of the chip supply means (3) and the holding hole (7a) of the holding member (7) to hold the holding hole (7) of the holding member (7). Depending on the presence or absence of the tip of 7a), the electrode tips (T) are dropped and supplied one by one only when the holding hole (7a) is empty. Further, the guide pipe (6) is supported so as to be movable back and forth with respect to the support plate (21), and in the case of trouble, it is moved rearward from the position corresponding to the holding hole (7a), so that the inside of the holding hole (7a) is It is provided so that the electrode tip (T) can be removed.

Reference numeral (10) is a cutting portion provided with a cutting cutter (11), and (12) is a support located above the cutting portion (10) and facing the cutting cutter (11) on the same axis. It is a rod.

The support rod (12) is connected to a rod (13a) of a cylinder device (13), which is a driving means provided above the support rod (12), and is vertically movable by the operation of the cylinder device (13). Each time the electrode tip (T) is fed to the cutting set position, the tip (12a) is press-fitted to the electrode tip (T) in the inverted posture by downward movement to join the tip (T). It is supposed to support.

Further, the support rod (12) is once lifted by the operation of the cylinder device (13) with the tip (12a) supporting the electrode tip (T) and holds the electrode tip (T) in a holding hole. (7a) is removed, the holding member (7) is allowed to return, and after the holding member (7) is returned, the electrode tip (T) is moved downward to move the electrode tip (T) of the lower cutting cutter (11). It is configured to advance and descend toward the part.

The cutting part (10) formed by the cutting cutter (11) arranged on the lower side of the cutting set position is configured as follows.

A holding cylinder (15) is rotatably fitted through a bearing to a cylindrical holding member (14) fixed vertically through the substrate (2), and the upper side of the holding cylinder (15). A cutter holder (16) holding a cutting cutter (11) according to the type and shape of the electrode tip (T) to be cut is fixed in the opening. The cutting cutter (11) is provided so that it can be replaced if necessary.

The holding cylinder (15) is provided with a gear (17) fixed to the outer periphery of the lower end side of the lower side of the substrate (2) and a gear (19) on the output shaft of the drive motor (18). A belt (20) for hanging is provided so as to be appropriately rotated and driven, whereby the tip of the electrode chip (T) supported by the support rod (12) and lowered and pressed. The surface is cut into a predetermined shape by a cutting cutter (11). Of course, the cutting cutter may be rotated by other driving means.

In order to keep the cutting amount of the electrode tip (T) by the cutting cutter (11) at a suitable constant amount, for example, the cutting amount of the electrode tip (T) is lowered with respect to the cutting cutter (11) of the supporting rod (12). The pressing time (cutting time) is set to be constant by a timer, and the operation of the cylinder device (13) is controlled to correspond to this. In addition, the rotation time of the cutting cutter (11) is set, and the amount of displacement after the support rod (12) is pressed or the amount of displacement of the cylinder device (13) is detected and controlled to keep the amount of cutting constant. It is also possible to do so.

Reference numeral (22) is a bush through which the support rod (12) penetrates, and the tip (12a) of the support rod (12) withdraws upward from the lower surface of the bush (22), so that the tip ( It is provided so that the electrode tip (T) press-fitted into 12a) can be removed.

Reference numeral (23) is a tip dispensing means arranged between the cutting set position and the support rod (12) above it, which can be opened and closed by the vertical movement of the support rod (12). Has a pair of receiving members (24a) and (24b) that are held in a closed state when the tool is in the ascending position, and the electrode tip (T) removed from the support rod (12) is discharged from the cutting set position and collected. It is provided to do. An example of its structure is shown in FIG.

In the tip dispensing means (23) shown in FIG. 6, a pair of receiving members (24a) (24b) having substantially L-shaped and inverted L-shaped cross sections are respectively arranged in the vertical direction behind the axial center portion at the cutting set position. It is fixed to a pair of support members (26a) (26b) rotatably provided about the shafts (25a) (25b) of the above, and a spring (27) is provided between both support members (26a) (26b). Is installed so that both receiving members (24a) and (24b) are normally held in a closed state. On the other hand, an action pin (29) parallel to the support rod (12) is vertically provided on the connecting plate (28) fixed to the support rod (12) which can move up and down. As the support rod (12) moves downward, the action pin (29) enters between the support members (26a) and (26b), and the support pins (26a) and (26b) are received together. The members (24a) and (24b) are provided such that they can be expanded against the spring (27). Further, the receiving members (24a) and (24b) are inclined rearward and are connected to a chute for collecting chips.

The action pin (29) extends above the receiving members (24a) (24b) in a state where the electrode tip (T) is press-fitted and supported on the tip (12a) of the support rod (12). It is longer than the support rod (12) so that it can be raised. Further, the above-mentioned receiving members (24a) and (24b) are provided so as to widen to an interval through which the electrode tip (T) can pass.

The operating state of the above cutting device will be described below.

The electrode tips (T) to be cut, which are aligned by the parts feeder (3) and are supplied downward one by one in an inverted posture with the tip facing downward from the delivery port (3b), are fed into the tip. The holding member (7) of the means (5) is fitted and held in the holding hole (7a) in the inverted posture (FIG. 2). Then, the holding member (7) laterally moves toward the cutting set position by the operation of the cylinder device (8), and sends the electrode tip (T) to the cutting set position while holding it in the inverted posture (Fig. 2).

When the electrode tip (T) is fed to the cutting setting position, the upper supporting rod (12) moves downward by the operation of the cylinder device (13), and at the same time, the chip dispensing means (23). The receiving members (24a) and (24b) of () expand. Then, the tip (12a) of the supporting rod (12) is pressed into the electrode tip (T) by the downward movement, and the electrode tip (T) is supported by the tip (12a). Then, the support rod (12) rises to remove the electrode tip (T) supported by the tip (12a) from the holding hole (7a) (FIG. 3), and at the same time, the holding member (7) Move back to the original position.

After that, the support rod (12) moves downward again, and the electrode tip (T) supported by the tip (12a) of the cutting cutter (11) of the cutting portion (10) arranged below is moved. Then, the tip surface is pressed against the cutting cutter (11) rotating by the drive motor (18) for a fixed time set by a timer or the like. As a result, the tip surface of the chip is cut into a predetermined shape (FIG. 4).

After the above cutting action, by the lifting of the support rod (12), the cut electrode tip (T) supported by the tip (12a) thereof comes into contact with the bush (22) (FIG. 5). , Release from the support rod (12). At this time, the receiving members (24a) (24b) of the tip payout means (23) are in a closed state, so that the electrode tip (T) separated from the supporting rod (1) receives the receiving members (24a) (24b). ) It is placed on the top, and it rolls backward and is collected due to its inclination.

The present invention is controlled by electrical means or the like so that the cutting action described above is performed as a continuous series of actions.

[0038]

[Effect of the device]

 As described above, according to the present invention, the worn and deformed welding electrode tips are sequentially supplied downward one by one in an inverted posture, and while being maintained in the inverted posture, are fed to the cutting set position while the tip thereof is being fed. The surface can be automatically and efficiently cut and shaped into a predetermined shape. In particular, since the electrode tip is supplied in an inverted position, it may be worn or deformed in a distorted shape, or the tip may have a semicircular shape or a taper shape. Also, it is possible to carry out a series of operations such as feeding to the cutting set position without any problems, and it is possible to automate this cutting process, and it is possible to easily recycle the electrode chip by cutting process.

[Brief description of drawings]

FIG. 1 is a partially longitudinal front view showing an outline of an entire apparatus showing an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view showing a state in which a portion of the electrode chips are dropped and supplied.

FIG. 3 is a cross-sectional view in which an electrode tip is pulled out from a holding hole at the tip of a support rod.

FIG. 4 is a cross-sectional view during cutting with an electrode tip pressed against a cutting cutter.

FIG. 5 is a cross-sectional view in which an electrode tip after cutting is lifted.

FIG. 6 is a perspective view showing a tip payout means.

FIG. 7 is a front view showing a state before (a) and after (b) use of the electrode tip.

[Explanation of symbols]

 (T) Electrode tip (1) Device body (2) Substrate (3) Parts feeder (3a) Delivery port (4) Chute (5) Tip feeding means (7) Holding member (7a) Holding hole (8) Cylinder device ( 10) Cutting part (11) Cutting cutter (12) Support rod (13) Cylinder device (16) Cutter holder (18) Drive motor (22) Bushing (23) Chip ejection means (24a) (24b) Receiving member

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[Procedure amendment]

[Submission date] June 3, 1992

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Fig. 2]

[Figure 3]

[Figure 1]

[Figure 4]

[Figure 5]

[Figure 6]

[Figure 7]

Claims (2)

[Scope of utility model registration request] 1. An electrode tip for welding, which is an object to be cut,
It includes a tip supply means for dropping one by one with its tip facing downward and supplying it to the side of the cutting portion, and a holding member for holding the electrode tips dropped and supplied from the tip supply means in an inverted posture. , This holding member is moved laterally for each tip holding action by advancing and retracting means such as a cylinder device, and the tip feeding means for feeding the held electrode tip to the cutting set position in the inverted position, and the vertical direction above the cutting set position. It is arranged so that it can be moved up and down by driving means such as a cylinder device,
Each time the electrode tip is fed to the cutting set position, the tip is press-fitted to the electrode tip in the inverted posture by downward movement to support the tip, and the electrode tip is detached from the tip feeding means and is moved downwards to the cutting set position. A support rod that moves up and down with a vertical axis, is arranged below the cutting set position, and is rotatably driven by an appropriate driving means, and the tip of the electrode tip that moves up and down while being supported by the support rod is predetermined. A welding electrode tip cutting device comprising a cutting cutter that cuts into a shape. 2. Between the cutting set position and the support rod above it can be opened and closed by vertical movement of the support rod,
The support rod is provided with a pair of receiving members that are held in a closed state when the support rod is in a raised position, and a tip dispensing means that is capable of dispensing an electrode tip removed from the support rod by raising the support rod after cutting. The cutting device for a welding electrode tip according to claim 1, wherein: