JPH07112352A - Method and device for automatically machining end face of round rod - Google Patents

Abstract

PURPOSE:To provide a method and a device for automatically machining an end face of a round rod used, for example, as vertical bars or horizontal bars of a reticulate fence so as to insert the rod easily in a hole of a hollow pipe being a drum edge. CONSTITUTION:An intermittently moved round rod W is pressed from above during a stop and given several revolutions. The corner of the end face thereof during rotation is ground by a belt grinder 4 to form a tapered-off end face.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for automatically processing the end surface of a round bar.

[0002]

2. Description of the Related Art It has been practiced to assemble a mesh fence by using the above-mentioned round bar material as a vertical bar or a horizontal bar. Conventionally, when assembling this fence, the round bar material is coiled before assembly. It is common to cut a fixed length from a wound state with a straight line cutting machine. However, since the cut end face becomes slightly larger in diameter due to burrs around the end face due to the pressure at the time of cutting, the end part of the round bar material when inserting into the hole of the hollow pipe to be the furring edge However, there is a problem that the assembly cannot be practically performed because a plurality of insertions are made at the same time. It is possible to solve the problem by increasing the hole diameter of the hollow pipe, but if the hole diameter is increased, insertion is possible, but there is a problem in welding the hollow pipe and round bar after insertion. There was another problem.

[0003]

SUMMARY OF THE INVENTION Therefore, the present invention solves the above-mentioned problems of the prior art and provides a method for automatically processing the end surface of a round bar so that the round bar can be easily inserted into a hole of a hollow pipe or the like. The purpose is to provide a device.

[0004]

In order to achieve the above-mentioned object, the invention of claim 1 presses the round bar material which is intermittently moved from above at the time of stopping and rotates it several times, and during this rotation, the corner of the end face thereof is rotated. The portion is ground by a belt grinder to form a tapered end surface.

According to a second aspect of the present invention, an intermittent moving device for positioning a plurality of round bar members at predetermined intervals and intermittently moving them, and a few rotations by pressing the round bar member from above when the intermittent moving device stops moving. And a belt grinder device for grinding the corners of the end face of the round bar to form a tapered end face while the round bar is being rotated by the rotating device.

[0006]

As described above, since the round bar material is ground by the belt grinder and the end face is automatically tapered while rotating the round bar material, it can be smoothly inserted into the hole of the hollow pipe or the like.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a partially omitted front view showing an embodiment of the present invention, and FIG. 2 is a vertical sectional side view taken along the line II--II in FIG. 1 is an automatic end face machining device for round bars, and is an intermittent moving device 2
And a rotating device 3 and a belt grinder device 4. The intermittent moving device 2 has a pedestal 5, and a plurality of columns 6 to 9 that form a pair in the front and rear direction in FIG. A support bar 11 is attached to the left and right of the support bar 11, and a receiving bar 12 for receiving the round bar W on its upper surface is provided on the upper surface of the support bar 11.
It is supported and provided by. A sector shaft 15 is pivotally supported between the columns 6 to 9 below the column bar 11, and a base end of a cam lever 16 is fixed to the sector shaft 15. Cam lever 16
The roller portion 16a attached to the tip of the shaft supports the lower end bulging portion 18 of the sawtooth rod 17 and the sector shaft 15
The rotation of the cam lever 16 causes the Rechen rod 17 to move up and down. As shown in the enlarged view of FIG. 3, the Rechen rod 17 has a tooth bottom portion 19 formed on the upper surface for positioning and supporting the round bar W. Reference numeral 20 is a Rechen case in which a Rechen rod 17 is housed in a groove therein, and is attached to the support beam 11 via a bracket 21. Further, another sector shaft 23 is pivotally supported between the front columns 6 to 9 below the sector shaft 15 and at a position displaced forward, and a base end of a cam lever 25 is fixed to the sector shaft 23. The roller portion 25a attached to the tip of the cam lever 25 is engaged with the long groove 26 formed in the lower opening of the lower end bulging portion 18 of the Rechen rod 17, and the rotation of the sector shaft 23 causes the swing of the cam lever 25 to move the Rechen lever 25a. The rod 17 can be moved back and forth in the left-right direction.

The sector shafts 15 and 23 are fixed to the base ends of cam levers 28 and 29 having cam followers 28a and 29a at their tips between the columns 5 and 6, respectively.
The cam followers 28a and 29a abut against the outer peripheral surface of a cam 35 fixed via a nut 33 to a cam chock 32 on a cam shaft 31 pivotally supported between the pillars 5 and 6 below both sector shafts 15. The sector axis 1
5 and 23 are each rotated by a predetermined angle. A sprocket 37 is mounted on one end of each of the cam shafts 31, and an endless chain 38 is mounted between the sprockets 37, and the chain 38 is mounted on the shaft of a drive motor 39 installed at a substantially intermediate position thereof. The sprocket 40 mounted on the sprocket
Both cam shafts 31 are simultaneously rotated via 0, the chain 38, and the sprocket 37.

The rotating device 3 is installed at an upper position on both sides of the frame 5. An L-shaped support frame 46 is provided, and a support plate 47 is provided on the support frame 46 by cylinders 48, 49 so as to be vertically movable and movable in the front-rear direction. The lower end of the support plate 47 moves downward and moves to the front side so that the round bar W on the receiving bar 12
A turning plate 51 is attached by bolts 52 to press the plate from above and rotate it several times.

The belt grinder devices 4 are installed on both sides of the frame 5 at lower positions corresponding to the rotating devices 3, respectively. 56 is a grinder base on which a motor base 57
Is pivotably supported by a shaft 58. A belt grinder 62, which is rotated by a motor 60, is mounted on the motor base 57.
Is installed so that it can contact the end surface of the round bar W on the crosspiece 12 for receiving the belt 63. Abutment adjustment is performed on the cylinder shown on the left side of FIG.
By 65 (the right side is omitted), the motor base 57 is attached to the shaft 58.
Is used as a fulcrum and is brought into contact with and separated from the substrate 66. This is because it is necessary to loosen the initial grinding pressure. On the back side of the belt 63 of the belt grinder 62, a receiving plate 67 is arranged under the pressure of a spring 68 as shown in FIG.

In FIG. 2, reference numeral 71 denotes a material supplying device for supplying the round bar W to the Rechen rod 17, and an inclined portion 72 for supplying the round bar W by its own weight is provided.

The operation of this embodiment will be described. Feeding device 71
The round rods W supplied from each of them are supported one by one at the tooth bottom portion 19 of the Rechen rod 17 and positioned. Then, the cam shaft 31 rotated by the drive of the motor 39, the cam levers 28, 29 intermittently rocked by the rotation of the cam 35 by the rotation of the cam shaft, and the sector shaft 15 intermittently rotated by the rocking of these cam levers 28, 29. , 23, the cam levers 16 and 25 that are intermittently oscillated by the rotation of the sector shafts 15 and 23 move the Rechen rod 17 up and down and in the front-rear direction, whereby the round bar W moves on the receiving bar 12 from the rear side. It is sent intermittently to the front side. When the round bar W is sent to a certain position of the rotating device 3 and the belt grinder device 4 and is placed on the receiving bar 12 due to the downward movement of the Rechen rod 17 and the rearward movement, until then. The support plate 47 of the rotating device 3 located at the upper standby position is the cylinder.
A turning plate that moves downward by 48, presses it down from above by turning plate 51, and moves to the front side by cylinder 49.
The round bar W is rotated several times by 51.

On the other hand, a round bar W which is rotated during this several rotations
The belt 63 of the belt grinder device 4 is attached to the corners of both end faces of the
Contact with each other and rotate and move, so that the corners of both end surfaces of the round bar W are automatically ground by the surface of the belt. The ground rod W that has been ground is supported by the tooth bottom portion 19 immediately before the Löchen rod 17 by the movement and upward movement of the Löchen rod 17, and is sent further to the front side. Then, the next round bar W is rotated and ground, and in this manner, the corners of both end faces of the round bar W to be supplied are automatically ground. The movement of the Rechen rod 17 and the movement of the turning plate 51 at this time are shown in FIG. The circled numbers represent the order of movement of the Rechen rod 17, and a circle 2 sends the round bar W one pitch forward. The circle Iroha represents the order of movement of the turning plate 51,
Rotate the round bar W several times with a circle. When the diameter of the round bar W rotated by the turning plate 51 is D, the feed pitch is P, and the length of the turning plate 51 is L, L> 2 to 3π.
The relationship of D, 2P>L> P is established.

FIG. 6 shows light processing (A), medium processing (B), and
The shape of each end face of the round bar W ground by sharpening (C) is shown.
In this way, various end face shapes can be formed according to the application by how to apply the belt 63 of the belt grinder device 4. The operation of members such as a drive motor and an operating cylinder provided in each of the above-mentioned devices is automatically controlled by known detection members, electric parts, etc., thereby automating the entire device.

[0015]

According to the first aspect of the present invention, the round bar material which is intermittently moved as described above is pressed from above at the time of its stop and rotated several times, and the corners of the end face are ground by the belt grinder during this rotation. Since it is formed on the tapered end face, the end face of the round bar can be automatically processed so that it can be easily inserted into a hole such as a hollow pipe. Moreover, in addition to being able to perform a large amount of processing continuously, grinding is performed by a belt grinder, so high-speed processing is possible and processing time is short.
Further, the belt of the belt grinder locally contacts the corners of the end surface of the round bar, which is extremely good for wear and tear. The invention of claim 2 has an excellent effect that the above effect can be realized by a simple mechanism.

[Brief description of drawings]

FIG. 1 is a partially omitted front view showing an embodiment of the present invention.

FIG. 2 is a vertical sectional side view taken along the line II-II in FIG.

FIG. 3 is an enlarged view of part A of FIG.

FIG. 4 is an enlarged view of part B in FIG.

FIG. 5 is an operation explanatory view.

6 (A), (B) and (C) are drawings showing respective end face shapes of a polished round bar material.

[Explanation of symbols]

 1 End face automatic processing device 2 Intermittent moving device 3 Rotating device 4 Belt grinder device 6 to 9 Strut 12 Receiving bar 15, 23 Sector shaft 16, 25, 29 Cam lever 17 Rechen rod 31 Cam shaft 35 Cam 38 Motor 47 Support plate 51 Turning plate 62 Belt grinder 63 Belt 65 Cylinder

Claims (2)

[Claims] 1. The intermittently-moving round bar member is pressed from above when it is stopped and rotated several times, and the corners of its end face are ground by a belt grinder to form a tapered end face during this rotation. Automatic end face machining method for round bar. 2. An intermittent moving device for positioning a plurality of round bars at predetermined intervals and intermittently moving them, and a rotating device for pressing the round bars from above to make several rotations when the intermittent moving device stops moving. An automatic end face processing apparatus for a round bar material, comprising a belt grinder device for grinding a corner portion of an end surface of the round bar material to form a tapered end surface during rotation of the round bar material by the rotating device.