JPH0321796Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is a multi-stage heading forming machine that forms a product of a predetermined shape by sequentially heading a supplied material step by step, and is particularly applicable to the forming machine. This invention relates to a semi-molded product supply device equipped with the equipment.

(Prior art) Generally, in a multi-stage heading forming machine, a plurality of heading dies ranging from coarse to fine are arranged side by side at regular intervals on a die block equipped on the machine base, and adjacent heading dies are arranged side by side at regular intervals. The same number of material transfer chucks as the forging dies are attached to the front of the reciprocating movable frame, and the chucks sequentially transfer the material supplied from coarse to fine forging dies,
Bolts, nuts, or parts of various shapes are produced by forging the above-mentioned materials in stages between each forging die and a forging punch that is disposed opposite to the forging die and moves back and forth with respect to the forging die. It is made to be molded. By replacing the forging die, forging punch, and material transfer chuck, a single forging machine can manufacture various types of molded products, thereby improving the versatility of this type of forging machine. It is designed as follows.

(Problems to be solved by the invention) By the way, when a product C having a shape as shown in FIG. 3 is forged using a multi-stage forging machine,
Similarly, the material A having the shape shown in Fig. 3 is subjected to the forging process between the above-mentioned forging die and the forging punch in stages as shown in ~, and finally finished in the shape shown in Figure 3. However, the material A is sequentially pressed in each step and gradually work-hardened. Therefore, for example, if you try to perform the forging process leading to ~ in succession, the amount of swaging in the forging process is extremely large compared to other processes, so that the blank B ₂ is subjected to work hardening in this process. As a result, cracks D and the like occur, resulting in defective products being molded. Therefore, with one heading molding machine, material A having the shape shown in
It was difficult to continuously perform the forging process shown in the figure to form the product C having the shape shown in the figure.

Therefore, conventionally, when forging a product C having the shape shown in the figure, the forging process is performed using one forging machine to create a blank B ₁ (semi-formed product).
was continuously formed, and this blank _B1 was once taken out from the forging machine and annealed.
By feeding the blank _B1 again to another forging machine, the blank B1 was subjected to the forging steps of ~ to continuously form a product C having the shape shown in Figs. For this reason, it is necessary to prepare at least two heading molding machines, which makes the equipment and the like unnecessarily expensive.

In addition, if one attempts to form a product C having the shape described above using a single heading molding machine, a certain amount of blank B ₁ (semi-formed product) will be continuously pressed through the heading process as the primary processing. After that, by annealing the blank B ₁ and replacing the forging die, forging punch, and material transfer chuck installed in the forging machine, a certain amount of the annealed blank B ₁ can be used for forging again. It was necessary to supply the product and perform the following forging steps as secondary processing to form the product C having the shape shown. For this reason, each time a certain amount of blank B ₁ is forged, the forging die, forging punch, and material transfer chuck must be replaced as described above, which significantly reduces work efficiency. .

Therefore, the present invention was developed in a multi-stage heading molding machine that forges the supplied material step by step to form a product of a predetermined shape, and the semi-formed product in the middle of the forging process is temporarily discharged outside the heading molding machine. At the same time,
After subjecting the semi-formed product to a specified intermediate treatment such as annealing, the semi-formed product is equipped with a semi-formed product supply device that supplies the intermediately processed semi-formed product to the forging machine again, so that the predetermined intermediate processing such as annealing is carried out during the forging process. Products that would otherwise be difficult to form without intermediate processing can be continuously formed using a single forming machine without replacing the forming die, forming punch, or material transfer chuck installed in the forming machine. The purpose is to process.

(Means for Solving the Problems) In order to achieve the above object, the present invention is characterized by the following configuration.

That is, a die block is equipped on a machine base and has a plurality of dies ranging from coarse to fine arranged side by side at regular intervals;
A plurality of punches attached to the front surface of a ram that moves forward and backward to face each of the dies, a fixed frame placed on the machine stand, and a fixed frame that moves back and forth in the direction in which the dies are arranged side by side. A movable frame that is freely connected and removably attached to a plurality of material transfer chucks so as to hang from the front surface of the die block, and each of the chucks is driven to reciprocate between positions in front of the axes of adjacent dies. In a semi-formed product supply device for a multi-stage heading forming machine having a driving means and an opening/closing means for opening and closing each chuck attached to a movable frame, a first predetermined portion of a plurality of dies arranged in parallel on the die block is provided. The die serves as a discharge die for discharging the semi-formed product forged by the die and the punch facing the die to the outside of the forging machine, and a second predetermined die located on the downstream side of this die A receiving die for receiving the semi-molded product discharged outside and subjected to intermediate processing, and a supply chute detachably attached to a predetermined position on the movable frame; and a supply means for supplying semi-molded products that have been subjected to intermediate processing, and the supply chute has a structure in which a plurality of semi-molded products, which are supplied from the upper end opening through the supply means, are held in a line in the vertical direction. and is driven together with each chuck by the driving means to reciprocate between the axial front position of the receiving die and the axial front position of the preceding die, and The present invention is characterized in that when the semi-molded product is located at the receiving die, the lowermost semi-molded product is pushed in by a punch facing the die and supplied to the receiving die.

Further, the supply chute is provided with centering means for aligning the axis of the lowermost semi-molded product among the plurality of semi-molded products supplied to the chute with the axis of the receiving die. Features. .

(Function) According to the above configuration, the first
The semi-formed product forged with a predetermined die is discharged from the die and taken out of the forging machine, and the semi-formed product is subjected to a predetermined intermediate treatment such as annealing. The semi-molded product is supplied from the upper end opening of the supply chute via a suitable supply means such as a parts feeder. In this case, the supply chute is attached to a predetermined position on the movable frame, and is driven together with each chuck by a driving means to connect a second predetermined die which is a receiving die located downstream of the discharge die, Since the supply chute is configured to be reciprocated to and from the previous stage position, when the supply chute is located in front of the receiving die, it is located at the lowest position among the plurality of semi-molded products introduced into the supply chute. The semi-molded product is fed into the die by a punch facing the receiving die, and the semi-molded product is fed into the heading machine again. Then, by a material transfer chuck attached to a movable frame adjacent to the supply chute, the intermediately processed semi-molded products are sequentially transferred from the receiving die to a die located further downstream,
By performing heading in stages, a product with a predetermined shape is finally formed.

In this way, products that require predetermined intermediate treatments such as annealing during the forging process can be continuously formed using a single forging machine. Also,
In particular, when the supply chute is provided with a centering means, the axial center of the semi-molded product located at the lowest end among the plurality of semi-molded products supplied to the supply chute and the axial center of the receiving die are This will ensure that the half-formed product can be pushed by a punch and fed into a receiving die.

(Example) Next, a specific example of the present invention will be described based on the drawings.

1 and 2 are a plan view and a front view, respectively, of the main parts of a multi-stage heading molding machine equipped with a semi-molded product supply device according to the present invention.

First, to explain the multi-stage heading forming machine in which the present invention is implemented, a die block 2 equipped on the machine stand 1 of this heading forming machine has a plurality of heading dies 3...3 ranging from coarse to fine. The ram 4, which is installed in front of the die block 2 and reciprocates toward the die block 2, has the same number of forging punches 5...5 as the forging dies 3...3 attached to each of the forging dies 3.
It is held so that it is facing. Further, a fixed frame 6 is placed on the machine base 1 at the rear of the die block 2, and a shaft 7 supported in parallel with the fixed frame 6 is fixed to the rear end portions 6a, 6a of the fixed frame 6, respectively. At the same time, a movable frame 9 is reciprocatably connected to the fixed frame 6 via a pair of left and right swing links 8, 8 whose ends are pivotally attached to both sides of the fixed frame 6, respectively.
An intermediate frame 10 disposed between these frames 6 and 9 has both ends thereof connected to the swing links 8 and 8. Furthermore, one end of the movable frame 9 is provided with a direction perpendicular to the reciprocating direction of the ram 4 (left-right direction in FIG. 1) in synchronization with the reciprocating movement of the ram 4.
By connecting the driving rod 11 which moves forward and backward, the movable frame 9 is made to reciprocate once during the time that the ram 4 is retracting between the adjacent forging dies 3, 3.

On the front surface of the movable frame 9, a plurality of material transfer chucks 12...12 each having a pair of left and right chuck pawls 12a, 12b at the lower end are attached to the movable frame 9 at the same interval as the interval between the adjacent heading dies 3, 3. It is detachably attached via mounting bolts 13', 13' that are screwed into screw holes 13, 13 formed on the front surface of the chuck, and is provided for each chuck 12 for opening and closing the chuck pawls 12a, 12b. The rocker arms 14, 14 are disposed so as to straddle from the movable frame 9 to the fixed frame 6, with each middle being pivotally supported on the intermediate frame 10. When the movable frame 9 reaches the respective terminal ends of the forward and backward movement steps in the left-right direction, the chuck claws 12a and 12b are positioned in front of each heading die 3.

A cam drive shaft 15 is disposed on the machine base 1 behind the die block 2, and is supported in parallel behind the fixed frame 6.
Two opening/closing cams 16...16 are fixed on the shaft 15, and each cam arm 18...18 has a cam follower 17...17 attached to one end, which contacts each cam 16 in rolling contact with the shaft 15. The front end of the cam arm 18, which is pivotally supported on the fixed frame 6 and follows each of the cams 16 only during the double-action process of the movable frame 9, pushes down the rear end of the rocker arm 14, and is normally in an open state. The pair of chuck claws 12a and 12b on the left and right sides are configured to be closed.

An embodiment of the present invention in the multi-stage heading molding machine as described above is constructed as follows.

That is, the first predetermined die among the plurality of forging dies 3...3 arranged in parallel on the die block 2, for example, the forging die 3a shown in FIG. 5a (shown in FIG. 1) and serves as a discharge die for discharging the semi-molded product A formed from the forging machine to the outside of the forging machine. A predetermined die 3b is discharged from the forging machine and serves as a receiving die for receiving the semi-formed product A that has been subjected to a predetermined intermediate treatment such as annealing. At the mounting position of the material transfer chuck 12, a plurality of intermediately processed semi-molded products I are introduced, and a supply chute 1 that supplies the semi-molded products I to the receiving die 3b is installed.
9 is detachably attached via bolts 20, 20. This supply chute 19 is supplied with a plurality of intermediately processed semi-molded products via a suitable supply means (not shown) such as a parts feeder, and holds these semi-molded products in a line in the vertical direction. The drive rod 11 drives each chuck 12.
At the same time, the supply chute 19 is reciprocated between the axial front position of the receiving die 3b and the axial front position of the forging die 3c on the preceding stage side, and when the supply chute 19 is located in front of the receiving die 3b, the inside of the chute 19 The lowermost semi-molded product A is pushed into the receiving die 3b by a pushing punch 5b (shown in FIG. 1) provided to face the receiving die 3b. .

Further, the lower end of the supply chute 19 is provided with centering means 21 for aligning the axis of the lowermost semi-molded product introduced into the chute 19 with the axis of the receiving die 3b, This centering means 2
1 is a holding member 21a that presses against the side surface of the lowermost semi-molded product A to securely hold the semi-molded product A;
A spring 21b is used as an elastic member to keep the holding member 21a in pressure contact with the side surface of the half-molded product A so that the axis of the half-molded product A is aligned with the axis of the receiving die 3b.
and a stopper 21c that is attached to a bracket 22 fixed to the front surface of the die block 2 and opens the holding member 21a against a spring 21b, so that the supply chute 19 is positioned in front of the receiving die 3b. At the same time, the axis of the semi-molded product A located at the lowest position in the supply chute 19 is aligned with the axis of the receiving die 3b, and as shown by the chain line in FIG. When the supply chute 19 is positioned in front of the forging die 3c in the upstream position of the receiving die 3b, the holding member 21a is opened by the stopper 21c, and the plurality of semi-molded products introduced into the supply chute 19 are sequentially released into one piece. It is configured to be dropped downward one by one.

To explain the operation of this embodiment configured as described above, the semi-formed product A formed by forging between the ejecting die 3a and the forging punch 5a installed opposite thereto is transferred to the ejecting die 3a. It will be discharged and taken out of the heading molding machine. and,
After this semi-molded product A is subjected to an intermediate treatment such as annealing, it is again introduced into the supply chute 19 via a suitable supply means (not shown) such as a parts feeder. In this case, the supply chute 19 is removably attached to the mounting position of the material transfer chuck 12 of the movable frame 9 via bolts 20, 20, and the receiving die 3b and the forging at the preceding stage position are controlled by the drive rod 11. Since the chute 19 is configured to be reciprocated with the die 3c, when the chute 19 is located in front of the receiving die 3b at the end of the forward movement of the movable frame 9, the chute 19 is introduced into the chute 19. Then, the lowermost semi-molded product A held by the centering means 21 is pushed into the receiving die 3b by the pushing punch 5b. Then, when the movable frame 9 moves back and reaches its terminal end, the supply chute 19
A holding member 21a provided at the lower end of is opened and moved by a stopper 21c, and a plurality of semi-molded products A are sequentially dropped downward one by one. At this time, as shown in FIG.
A material transfer chuck 12 adjacent to the supply chute 19 is located in front of the chuck 1b, and the semi-molded product A extruded from the receiving die 3b is transferred to the chuck 1.
A pair of left and right chuck claws 12a, 12b in 2
It will be held in between. After that, the movable frame 9 moves forward again to transfer the next semi-molded product I to the front of the receiving die 3b, and also to transfer the semi-molded product that has been pushed out from the receiving die 3b and held in the material transfer chuck 12. The forging die 3 located on the rear side,
3, the forging process is performed step by step between the forging dies 3, 3 and the forging punches 5, 5 disposed opposite thereto, and a product of a predetermined shape is formed.

In this way, a product that would be difficult to forge without performing a predetermined intermediate treatment such as annealing during the forging process can be continuously forged using a single forging machine. In particular, since the centering means 21 is provided at the lower end of the supply chute 19, the axis of the semi-molded product A located at the lowermost position among the plurality of semi-molded products A supplied to the supply chute 19 can be adjusted. The axial center of the receiving die 3b coincides with that of the receiving die 3b, so that the semi-molded product A can be pushed into the receiving die 3b by the punch 5b and reliably supplied into the receiving die 3b.

(Effects of the invention) As described above, the present invention uses a multi-stage heading molding machine that forges supplied materials step by step to form products of a predetermined shape. After taking it out of the heading molding machine and subjecting the semi-formed product to a specified intermediate treatment,
Since we have installed a supply chute to feed into the forging machine again, products that would otherwise be difficult to forge without undergoing certain intermediate treatments such as annealing during the forging process can now be produced using two forging machines as before. Since the forging process can be performed continuously with one forging machine without using a forging machine, work efficiency is significantly improved. Moreover, in particular, since a centering means is provided at the lower end of the supply chute, the axis of the lowermost semi-molded product among the plurality of semi-molded products supplied to the supply chute is aligned with the receiving die. The axes of the semi-formed product coincide with each other, so that the semi-formed product can be pushed into the receiving die and reliably fed into the receiving die.

Furthermore, since the supply chute is removably attached to the mounting surface of the material transfer chuck, by attaching a normal material transfer chuck in place of the supply chute, one head forming machine can be used with the above supply chute. It can be used as a special model equipped with this machine or as a general-purpose model that performs general heading processing, and the versatility of this type of heading forming machine is further improved, thereby making it possible to significantly reduce equipment costs and the like.

[Brief explanation of the drawing]

Figures 1 and 2 are a plan view and a front view of the main parts of a multi-stage heading machine equipped with a semi-molded product supply device according to the present invention, respectively, and Figure 3 is a schematic diagram of heading forming showing the problems of the conventional method. It is a process diagram. 1... Machine base, 2... Die block, 3... Forging die, 3a... Discharge die, 3b... Receiving die, 9... Movable frame, 12... Material transfer chuck, 19... Supply chute , 21...centering means, 21a...holding member, 21b...spring, 2
1c...stopper.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A die block equipped on a machine base and having a plurality of dies ranging from coarse to fine arranged side by side at regular intervals, and a ram that is moved forward and backward so as to face each of the dies. A plurality of punches attached to the front surface, a fixed frame placed on the machine stand, and a plurality of material transfer chucks connected to the fixed frame so as to be able to reciprocate in the direction in which the dies are arranged side by side. A movable frame removably attached to hang down on the front surface, a driving means for driving each chuck to reciprocate between the front positions of the axis of adjacent dies, and a drive means for opening and closing each chuck attached to the movable frame. A semi-formed product supplying device for a multi-stage heading forming machine having an opening/closing means for opening and closing the die, wherein a first predetermined die of a plurality of dies arranged in parallel on the die block is connected to the die and a punch opposing the die. A second predetermined die, which serves as a discharge die for discharging the half-formed product forged by the machine to the outside of the forging machine, and located on the downstream side of this die, serves as a discharging die for discharging the semi-formed product forged from the machine to the outside of the forging machine, and a second predetermined die located on the downstream side of this die is used to discharge the half-formed product that has been intermediately processed after being discharged from the machine. A supply chute serving as a receiving die for receiving molded products and detachably attached to a predetermined position on the movable frame, and a semi-formed product discharged from the discharge die to the supply chute and subjected to intermediate processing. the supply chute is configured to hold a plurality of semi-molded products supplied from the upper end opening through the supply means in a line in the vertical direction; The chuck is driven by means to reciprocate between the axial front position of the receiving die and the axial front position of the preceding die by being driven together with each chuck, and when located at the axial front position of the receiving die. 1. A semi-molded product supply device for a multi-stage heading molding machine, characterized in that the semi-molded product is configured to push the lowest semi-molded product into a receiving die by a punch facing the die. (2) The supply chute is equipped with centering means for aligning the axis of the lowermost semi-molded product among the plurality of semi-molded products supplied to the chute with the axis of the receiving die. A semi-molded product supplying device for a multi-stage heading molding machine according to claim 1, which is characterized in that: