JPH0627242Y2 - Homer cutting mechanism - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a horizontal homer for producing metal products such as nuts and washers by continuous pressure forming from a wire rod, and particularly to a cutting mechanism in a homer for thinly cutting the wire rod. .

[Prior Art] A cutting mechanism in a homer is, for example, as disclosed in Japanese Utility Model Laid-Open No. 62-13.
No. 7647 (Actual Application No. 61-24761), No. 59
No. 22904, No. 59-22905, etc., the proposals have been made by the applicant.

[Problems to be Solved by the Invention] In such a known device, as shown in FIG. 5, the quill 51 is provided with the wire W'which is continuously fed by the feed roll.
Dimension t ₁ given by pressing the stopper 52 from the distal end opening of
In the case of thin cutting, the stopper 52 is set so as to enter the knife holder 56 and the knife 53, so that the effective diameter D'of the stopper 52 is equal to the outer diameter d'of the wire W '. It is necessary to limit it to about one half,
Therefore, there is a problem in that the bending stress at the tip of the wire material generated at the time of cutting causes the stamping scratches (rubbing scratches) of the stopper on the cut surface. Also, when cutting, metal cutting chips are generated and attached between the cutting knife and the stopper to cause a short circuit, which may cause the energized sensor to malfunction.
Also, when the cut material is inserted into the transfer chuck by the pusher protruding, an unstable state occurs in the hollow part of the knife mechanism provided for the stopper to enter, so that it cannot be grasped by the chuck claw in the correct posture. There has been a problem that various troubles cannot be avoided in the subsequent pressing process.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to make it possible to set the stopper at a position where it does not enter the inside of the knife holder and the knife, and the effective diameter of the stopper. A cutting mechanism in a homer capable of eliminating the scratches generated on the cut surface by a stable contact support of the wire end face and thereby completely eliminating the harmful effects and other troubles caused by the cutting waste generated at the time of cutting. Is to provide.

[Means for Solving the Problems] In order to achieve the above object, the homer's cutting mechanism according to the present invention uses a stopper that feeds a material made of a continuous metal wire from a tip end of a quill and faces the front. In a device that receives and cuts it to a certain size with a moving knife for cutting that moves back and forth across the tip end of the quill, in such a way that the tip end of the quill projects forward from the end surface of the die block by a predetermined distance. While setting, the moving knife is set so that the lateral groove of the inner surface of the moving knife for cutting slidably contacts the tip projection of the quill from above and below, and the stopper is at least larger than the hole diameter of the moving knife. It is formed to have a diameter and is set outside the knife holder.

In the cutting mechanism of the above-mentioned homer, it is preferable that the quill be supported on a taper holder so that the tip of the quill can be moved back and forth so as to be retracted from the end surface of the die block.

Further, the quill may be provided with an operation unit for operating the support position adjustment of the quill.

Further, a guide portion for leading out metal scraps can be formed in the lateral groove in which the tip projection portion of the quill slides in the knife inside.

[Operation] In FIGS. 3 to 4, when a material W made of a continuous metal wire is fed forward (arrow a) by a feeding device (not shown), the tip of the material W projects from the tip opening 1 a of the quill 1. It is received by the stopper 2.

In this state, when the moving knife 3 moves laterally in the direction of the arrow B so as to cross the tip opening 1a of the quill 1, the material W is cut into the width t.

The cut material is held in the hole 3a of the knife 3 and is pushed immediately before the pusher 18 at the same time as cutting, so that the pusher 18 protrudes forward and pushes the material out of the hole 3a of the knife in the next operation. At the same time, push it into a transfer chuck (not shown) that makes it stand by for chucking. Next, this transfer chuck is the first stage die
I carried it to just before 19 and received the forging action by punch 20,
After that, it is sequentially sent to the second and third stages and processed into a predetermined forged product.

Since the stopper 2 is set outside the moving knife 3 and the knife holder 6 and its effective diameter D is also larger than the wire diameter d, scratches are not generated on the tip surface of the material W at the end surface of the stopper 2 during cutting. Can be prevented. Moreover, even if cutting dust such as metal powder is generated during cutting, it falls down as it is. What has entered the knife 3 is led out to the outside from the mechanism 5 on the inside through the taper guide portion 5a. Further, air or oil is sprayed from the nozzle 14 toward the contact portion on the outer side of the knife 3 with the stopper 2 to clean the vicinity.

The operation of adjusting the protruding length of the tip portion of the quill 1 and the attachment / detachment of the knife 3 are performed as follows.

First, when the operation knob 9 of the operation portion 8 is rotated in the forward or reverse direction, the screw shaft 9a is screwed and the taper holding base 7 is moved up and down. By the engagement of 7b, the cradle 7'moves forward (arrow a) or backward and the quill 1 is moved and adjusted via the guide body 21.

When the tip projection of the quill 1 is retracted into the die block 4 or retracted to a level flush therewith, the tip of the quill 1 is disengaged from the lateral groove 5 inside the knife 3, so the lid 6a of the knife holder 6 is removed. Is opened, the knife 3 is taken out, and the knife 3 is detached.

[Embodiment] The stopper 2 is made of a square bar or a round bar plate, and the tip 2a is formed into a spherical surface so that the contact with the material W is performed with a small friction coefficient. The stopper 2 is held by the stopper holder 10 and fixed by the lock bolt 11, and the mounting position is adjusted by the adjusting bolt 12.

The moving knife 3 has a thin disk shape having a hole 3a through which the material W passes, a protrusion 3b is provided on the outer peripheral surface thereof, and the concave groove 6b on the inner surface of the knife holder 6 is fitted in a concave-convex shape. Attach it so that it does not move in the front-back direction and does not come out. The lateral groove 5 on the inner surface of the knife 3 has a bottom portion 5b formed in a taper shape, and the taper guides metal scraps to be guided to the gap 13 and the taper guide portion 5a.

The knife holder 6 is formed by splitting the main body 6c and the lid 6a so that the lid 6a can be opened and closed with the pivot 22 as a fulcrum, but is normally locked by a snap or a set screw 23.

The operation knob 9 of the operation unit 8 is a dial type with a scale, and the scale indicates the amount of rotation.

The taper holder 7 and the quill 1 are fixedly fixed by a lock mechanism 15.16.

The lock mechanism 15 includes a set screw 15a and a holding plate 15b, and the holding plate 15b locks or unlocks the base plate 8a of the operation unit 8.

The lock mechanism 16 includes a set screw 16a, a slide plate 16b, and a fixing screw 16c. When the set screw 16a is loosened, the slide plate 16b becomes free and the quill 1 slides back and forth together with the die block 4. Fixing screw 16c
Loosen and pull out upward, die block 4 and quill 1
And can be freely rotated and can be separated.

[Advantage of the Invention] As described above, the present invention sets the quill 1 so that its tip opening 1a projects forward from the tip surface of the die block 4 by a predetermined small distance A, and the tip of the quill 1 The protruding portion of the quill 1 is supported so as to be retractable so that the protruding portion can be retracted from the tip surface of the die block 4, and the lateral groove 5 on the inner surface of the cutting knife 3 is fitted into the tip protruding portion of the quill 1 from above and below. Set the moving knife 3 so as to slide on the
Since the stopper 2 is formed to have a diameter D which is at least larger than the hole diameter d of the moving knife 3 and is set outside the knife holder 6, when a material made of a metal wire is thinly cut by the moving knife and a quill. In addition, since the stopper does not enter the inside of the knife holder and knife as in the past, it is possible to use a stopper with an effective diameter larger than the wire diameter of the material, and as a result, even if bending stress acts on the tip of the material during cutting, the load Since no scratches are concentrated on the cut surface, pressure damage (rubbing) due to a stopper does not occur on the cut surface, and a thin material with a clean cut surface can be easily and reliably obtained.

Further, according to the second aspect of the invention, the quill is attached with the tip portion protruding from the end surface of the die block, and the protruding length can be adjusted by a simple operation. The knife fitted in can be easily detached by moving the quill in the retracting direction by moving the taper holder up and down by operating the operating portion.

Further, according to the structure of claim 3, even if metal powder, fins, etc. are generated during cutting, they can be led out to the outside without accumulating in the knife holder and the moving and moving knife, so that an electrical short circuit is not generated, and therefore a knife and It is possible to prevent malfunction of the energization type sensor due to a short circuit between the stoppers as much as possible, the structure is simple, durable and easy to implement.

[Brief description of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is a plan view showing an entire homer equipped with the present invention, and FIG. 2 is an enlarged front view of the main part as seen from the tip mouth side of the quill. FIG. 3 is an enlarged plan view of the same, part of which shows a cross section. FIG. 4 is a sectional view taken along line XX in FIG. 3, and FIG. 5 is a vertical sectional side view of a conventional stopper and cutting mechanism. 1 ... Quill, 2 ... Stopper 3 ... Knife, 4 ... Die block 5 ... Lateral groove, 6 ... Knife holder 7 ... Tapered holder, 8 ... Operation part

Claims (3)

[Scope of utility model registration request] 1. A cutting process in which a material W made of a continuous metal wire is sent out from a front end opening 1a of a quill 1 and is received by a stopper 2 facing the front portion, and is moved forward and backward so as to traverse the front end opening 1a of the quill. In the device for cutting the quill 1 with a moving knife 3 for cutting, the quill 1 has a tip opening 1a.
Is set so as to project forward from the tip surface of the die block 4 by a predetermined small distance A, and the tip projection portion of the quill 1 is supported so as to be movable forward and backward so that it can be retracted from the tip surface of the die block 4. The moving knife 3 is set so that the lateral groove 5 on the inner surface of the cutting moving knife 3 slidably contacts the tip projection of the quill 1 from above and below, and the stopper 2 has a hole diameter of the moving knife 3. A cutting mechanism in a homer, which is formed to have a diameter D at least larger than d and is set outside the knife holder 6. 2. A cutting mechanism for a pair of homers according to claim 1, wherein the quill 1 is provided with an operating portion 8 for operating a support position adjustment of the quill. 3. The cutting of a homer according to claim 1, wherein a taper guide portion 5a for leading out metal scraps is formed in a lateral groove 5 in which a tip projection portion of the quill 1 inside the moving knife 3 slides in a fitting manner. mechanism.