JPS605955Y2 - Knockout pin protrusion adjustment device for parts former - Google Patents

Description

[Detailed description of the invention] This invention relates to a parts former that drives part materials such as bolts, such as wire, into a die installed on the machine base using a punch and sequentially plastically deforms them into the shape of a bolt. The amount of material driven into (
This invention relates to a device for automatically adjusting the neck length (commonly referred to as the neck length in this industry).

A conventional example and the gist of this invention will be explained below with reference to drawings showing one embodiment of this invention.

In FIG. 1, reference numeral 1 designates a parts former, for example, a bolt former. A dive jig 2 is attached to one end face of the machine base 1, and a die 2a is press-fitted into the guide block 2. and a bottom plate 2b.

Also, there is a knockout pin insertion hole 3 in the axial center of the machine base 1.
is provided through the die 2a and the bottom plate 2b.
communicates with the small diameter die hole 4 and pin insertion hole 5 provided in the
A female threaded portion 6 is formed on the inner periphery of the other end over a required width in the axial direction, and a threaded cylinder 8 having a male threaded portion 7 formed on its outer periphery is screwed into this.

A knockout pin 9 is inserted into the threaded cylinder 8, the pin insertion hole 3, the pin insertion hole 5, and the die hole 4. More precisely, the knockout pin 9 is a knockout in the narrow sense in which the tip thereof is located in the die hole 4. It consists of a pin 9a, a knockout main pin 9b that presses it, or an intermediate pin (not shown) provided between the two depending on the model. A diameter stepped portion 10 is formed.

Therefore, the distance 1 from the tip of the knockout pin 9a in the die 2a to the end surface of the die is determined by the position where the diameter step 10 of the knockout pin 9 comes into contact with the end surface 8a of the threaded cylinder 8 screwed into the machine base 1.

In other words, the driving amount (length under the neck) 1 of the part material, such as the bolt material 12, driven into the die 2a by the punch 11 is determined by the screwing amount of the threaded cylinder 8 into the machine base 1.

Note that the material 12 driven into the die 2a is kicked out from within the die by the broadly defined knockout pin 9 being pushed forward by a knockout mechanism (kick-out mechanism) such as a crank or drive mechanism (not shown), and then transferred to the process.

Conventionally, in order to adjust the screwing amount of the threaded barrel 8 into the machine base 1, the lock nut 13 is loosened and the threaded barrel 8 is rotated and moved manually each time using a hand tool. Ta.

For this reason, for example, in the case of a multi-stage parts former, the material must be driven into the die sequentially in three to five stages, and the threaded cylinder of each stage must be moved and adjusted each time the length under the neck is changed. Unfortunately, this was done manually each time, which caused a significant drop in operating rates.

In order to eliminate the inability to do this manually, a technique has been proposed in the past in which the screwing amount of the screw thread is adjusted by a power drive means, as shown in Japanese Patent Publication No. 50-2782, for example.

In this conventional technology, a spur gear is fixed to the tip of a threaded cylinder, and a correspondingly wide driving spur gear in the axial direction is meshed with the spur gear, and the screw cylinder is driven by the driving spur gear connected to a power drive source. The screw barrel is rotated through a spur gear at the tip to adjust its movement in the axial direction.

This conventional technique has the following drawbacks.

First, the spur gear must be fixed to the tip of the threaded cylinder.

The overall length of the threaded cylinder is predetermined in relation to the knockout pin that is inserted into it, and extending the spur gear to this will naturally change the overall length of the threaded cylinder. Therefore, the existing threaded cylinder and knockout pin cannot be used as they are.

Furthermore, a specially designed spur gear that is quite wide in the axial direction must be installed as a drive spur gear for rotationally driving the threaded cylinder, which naturally increases manufacturing costs.

Furthermore, since the spur gear at the tip of the threaded cylinder meshes with the drive spur gear while moving in the axial direction, the meshing position with respect to the drive spur gear at the axial tip and the meshing position with the drive spur gear at the axial base end are different from the driving spur gear. The load on the shaft that supports the (
Therefore, during long-term use, frequent fluctuations in load will cause play in the pivot portion, which prevents accurate meshing of the spur gear and causes overload on the power drive source.

This idea focuses on the above-mentioned difficulties and automatically adjusts the amount of screwing of the threaded tube into the machine base, while also making it possible to automate the process by simply adding some processing to the existing threaded tube. In other words, the male threaded portion 7 of the threaded cylinder 8 is cut out at required intervals in the circumferential direction and partially in the longitudinal direction of the threaded cylinder to obtain a required width in the longitudinal direction of the threaded cylinder, that is, a wide range in which it is necessary to move and adjust the threaded cylinder 8. The spur gear part 14 of (first
2), a drive gear 15 is meshed with this spur gear portion 14.

The drive gear 15 is mounted on the support bracket 1, and the drive shaft 17a of the electric motor 17 integrally attached to one end of the support bracket 16 has sprockets 18a, 18b and a transmission chain 718c. They are interlocked and connected through.

Further, the electric motor 17 may be installed at a fixed position on the machine base 1, but as in the embodiment, it is integrally attached to a guide bracket 19, and the machine base is attached to the bracket 19 in a direction orthogonal to the threaded cylinder 8. A feed screw rod 20 installed on the feed screw rod 20 is screwed into the feed screw rod 20, and a guide rod 21 also installed on the machine base 1 is inserted parallel to the feed screw rod 20.
Another electric motor 22 is interlocked to one end, and the screw feed of the feed screw rod 20 rotated by this drive source is guided by the guide rod 21 to the support bracket 16.
It is preferable that the electric motor 17 integrated therewith be movable in a direction perpendicular to the threaded cylinder 8.

In order to change the head length 1 of the material 12 punched into the die 2a by the secondary punch 11, the driving gear 15 is driven by the electric motor 17, and this driving force is applied to the spur gear portion meshing with the driving gear 15. 14 to rotate the threaded cylinder 8, the amount of screwing of the threaded cylinder 8 into the machine base 1 can be freely adjusted.

In this case, when the threaded cylinder 8 is stationary, there is no need to provide the lock nut 13 because the movement is not restricted by the electric motor 17 or the like, but there is a risk that it may move slightly due to vibrations during punching. It is preferable to make time.

As shown in FIG. 3, in the case of a multi-stage former, for example, a five-stage former, the threaded cylinders 8 are numbered 8a to 5th 8e, so the screwing amount of the first threaded cylinder 8a is When the adjustment is completed, the electric motor 22 is driven to move the support bracket 16 directly above the second threaded cylinder 8a, and the amount of screwing is adjusted. The adjustment is made sequentially from No. 8e.

As described above, according to this invention, the threaded part on the outer periphery of the threaded cylinder is partially cut out at required intervals in the circumferential direction and in the longitudinal direction of the threaded cylinder, and a wide spur gear part is carved in the threaded part in the longitudinal direction of the threaded cylinder. However, since the amount of screwing of the threaded cylinder into the machine base can be adjusted simply by meshing the spur gear with the drive gear, there is no need to make any changes to the overall length of the threaded cylinder itself.
Therefore, it is possible to automate the process by simply adding simple improvements to the existing equipment including the existing threaded tube.

In addition, according to the present invention, the screw tube itself is provided with a wide spur gear portion that does not interfere with the axial movement of the screw tube. Gears can be used, which reduces manufacturing costs.

Furthermore, according to the present invention, since the axial movement of the threaded cylinder 8 does not cause a change in the meshing position of the drive spur gear that meshes with this spur gear portion, the load on the shaft portion that pivotally supports this drive spur gear is reduced. It is always constant and this pivot part will not wear out even after long-term use.

This means that the driving spur gear and the driving means for driving it can be smoothly moved over a long period of time in a direction perpendicular to the threaded cylinder by being guided and supported by this pivot portion.

[Brief explanation of drawings]

The drawings show one embodiment of this invention, of which Figure 1 is a longitudinal sectional front view, Figure 2 is a perspective view of the same main part, and Figure 3 is a partially cutaway side view. 1... Machine base, 2... Gui block, 7
...Threaded portion, 8...Threaded cylinder, 9...
... Knockout pin, 14 ... Spur gear part,
15... Drive gear.

Claims (1)

[Scope of utility model registration request] Attach a Goui block to the end face of one end of the machine base, screw a threaded tube inside the other end, and insert a knockout pin that can freely move back and forth between the Goui block and the screw barrel to adjust the screwing amount of the screw tube to the machine base. In a parts former that adjusts the amount of protrusion of the knockout pin in the Goui block, the threaded part on the outer periphery of the threaded cylinder is cut out at required intervals in the circumferential direction and partially in the longitudinal direction of the threaded cylinder, and the threaded part is inserted into the threaded part. A wide spur gear portion is carved in the longitudinal direction, a driving gear is meshed with the spur gear portion, and the driving gear and a driving means for driving the driving gear are provided so as to be movable together in a direction orthogonal to the threaded cylinder. Knockout pin protrusion adjustment device for parts formers.