JPH03274Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a multi-stage forming machine, particularly a small multi-stage forging machine, for manufacturing various parts from continuous metal material in multiple stages.

(Prior art and problems) In machines that use a multi-stage former to forge various parts from metal wire rods, the entire process from cutting to forging is carried out continuously and fully automatically. In the case of heading, precision becomes an issue because the cutting must be done in short dimensions, which necessitates a large machine, which poses problems in terms of quality and cost.

In particular, with conventional multi-stage formers, material is fed from the die side, received by a stopper so as to protrude into the quill tip opening of the die block, the dimensions are determined, and the material is then moved from a moving knife across the quill to cut the material. Therefore, there is no problem with long dimensions, but if a short dimension, for example, a material with a wire diameter of 10 mm is sliced into 1 to 2 mm pieces, the cutting material will be deformed by shearing force, resulting in poor precision, which will also affect the subsequent heading process. There is a problem in that this can lead to the occurrence of defective products.

Also, the cut material is pushed to the pusher position at the same time as cutting, and there it is pushed into the die side, and after being pushed out by the pusher, it is grabbed by the transfer chuck and transported to the No. 1 die, so one extra step is required. , which increases the size of the machine. Furthermore, in conventional homers, the movable ram is moved forward and backward by a crank, but since the crank device is installed at the rear of the punch side and the punch collides with the die when the crank is pushed forward, the pushing stroke of the crank is must be expected,
As a result, the overall length of the machine becomes longer, which also causes the problem that the overall size of the machine becomes larger.

(Technical Issues) Therefore, in the present invention, the material is fed from the punch side and cut within the die to improve cutting accuracy even for short-sized items, and the conventional process is reduced to one by eliminating the stopper device and pusher device. The technical challenge is to reduce the number of steps and to downsize the entire machine.

(Means for solving the problem) In order to solve the above technical problem, the present invention
A material feeding device 10 that intermittently feeds a material W made of a continuous metal wire, and a cutting device 20 that can cut the material into a fixed size using a quill 21 and a moving knife 22 that moves across the tip of the quill.
A device 3 for sequentially forging the cut material W' with dies 32 arranged in a horizontal row and punches 35 arranged on the movable ram 1 side so as to face each of the dies 32.
0, the material feeding device 10 is provided at the rear of the moving ram on the punch side, and the guide passage 2 for guiding the fed material is guided through the moving ram 1 and the punch holder 3 to the tip of the punch. The quill 21 is provided in the No. 1 die 31 having a built-in knockout device 40 on the die side, into which the tip of the material sent out from the punch side through the movable knife 22 is fitted, When the quill moves and reciprocates in the cutting direction, the first quill 21 and the second die 32 move simultaneously and carry the cut material W' extruded from the first die 31 to the second die 32. A transfer link 51 is provided.

(effect) The above technical means works as follows.

The material W is intermittently fed out by the material feeding device 10 shown in FIG. 1 and guided from the rear of the moving ram 1 through the guide passage 2 to the front of the punch holder 3, and the tip of the material is formed of an annular body. Quill 21 provided on the die side via the moving knife 22
It is accepted as if it were inserted into the

The quill 21 is located on the No. 1 die 31, and since there is a knockout pin 41 at the bottom, the cutting length can be adjusted by adjusting the position of the knockout pin 41.

In this state, when the movable knife 22 moves from the position shown by the solid line to the position shown by the chain line in FIG. At this time 2
The first transfer chuck 51, which was located at the number die 32, moves in conjunction with the moving knife 22 and stops just in front of the quill 21.

Next, at the same time as the movable ram 1 retreats, the knockout pin 41 protrudes from within the first die 31 and pushes out the cut material W' from within the quill 21, and the first transfer chuck 51 waits in advance.
Forcibly push the object and hold it.

The movable knife 22 that has moved to the right returns to the original position of the quill due to the elasticity of the spring 23, and at the same time the cut material W' held by the first transfer chuck 51 is transferred to the second die along with this chuck. 3
Transported to 2.

The material W' transported to the No. 2 die 32 is then punched by the punch 35 that moves forward together with the movable ram 1, and heading is performed in the first step, and thereafter, the material is headed in the second and third steps in order. The pressed molded product is completed.

1 to 3, when the drive device 60 operates, the drive shaft 66 rotates via the belt 64 and flywheel 65, and the crankshaft 67 rotates. The rotation of the crankshaft 67 causes the crank arms 61 provided at both ends to reciprocate back and forth once for every rotation of the crank, thereby moving the movable ram 1 forward and backward.

The crankshaft 67 has another crank arm 68, from which the plate cam 63 is similarly caused to reciprocate back and forth via the bell crank 62.

Due to the operation of the plate cam 63, the movable knife swinging lever 25 swings from side to side about the intermediate support shaft 26 via the link 24, and when the plate cam 63 is pushed, the movable knife 22 moves from left to right. Then, the material W is cut, and when the plate cam 63 returns and the swing lever 25 becomes free, it automatically returns to its original position by the elasticity of the spring 23.

(effect) The present invention has the following unique effects.

The material is supplied from the punch side, and the material is held in the No. 1 die as it is inserted into the quill provided in the No. 1 die and cut with a moving knife that moves across the quill. Thus, cutting material of any size from the short dimension can be obtained with high precision.

At the same time as the material is cut, it is transported directly to the forging section by a transfer chuck, and there is no need for a stopper device or pusher device for determining the dimensions of the material as in the past, so at least one step can be omitted.

By reducing the number of steps by one, the steps from cutting to forging can be completed in a short time, improving productivity.

The entire machine is compact and can be provided at low cost.

(Example) A preferred embodiment of the invention is shown below.

The material feeding device 10 includes a pair of upper and lower rollers 10a,
10b, and the material W is fed so as to be caught between the rollers.

The movable ram 1 is provided so as to be slidable back and forth on the main body frame 70, and the left and right sides thereof are connected to crank arms 61, and the movable ram 1 is moved back and forth in the front and rear directions by driving from the drive device 60.

The punch holder 3 is attached to the front end of the movable ram 1, and is guided by guide bars 71 on both left and right sides to move forward and backward together with the movable ram 1.

A No. 1 die 31 and each of the second and subsequent dies 32, which contain the quill 21, are provided on the front end surface of the die block 4 at a constant interval S. This dive block 4 is installed on the main body frame 70, and is attached to both the left and right sides using the guide bars 71 so that it can be replaced as a set.

The guide bar 71 is engaged at both front and rear ends by an engagement device 72, and when the engagement is disengaged if necessary, it can be removed from the main body frame 70 with the punch holder 3 and die block 4 still attached, so that punches and dies can be set. When replacing, work can be done quickly and reliably. Engagement device 42
A hydraulic cylinder 73 is provided on the main body frame 70 side, and an engagement piece 74 that retracts and protrudes like a piston is engaged with and disengaged from an engagement recess 75 at the end of the guide bar 71.

A knockout device 40 having the same structure is provided in each die. To explain the No. 1 die 22 having the quill 21, when the bell crank 62 is driven from the drive device 60, the shaft 42 reciprocates at a certain angle, and this causes the kicking lever 43 to swing back and forth, causing the knockout to occur. Pin 44, intermediate pin 4
Knockout pin 41 located at the most distal end via 5
The cutting material W' is pushed out by projecting the quill 21 toward the front end opening of the quill 21 with each movement.

When changing the dimensions of the cutting material W′, use this pin 4.
Since the threaded sleeve 46 supporting the locking pin 4 is screwed into the die lock 4, by loosening the lock nut 47 and screwing it in the forward or reverse direction, the supporting position of the knockout pin 41 moves back and forth and the quill is removed. The depth can be adjusted.

The plate cam 63 has a bar 63a fitted into a guide bracket 69 so as to be slidable back and forth, and its rear end is connected to the bell crank 62 with a pin 62a, and a cam surface 63b is formed at its front end. The connecting rod 24 is pressed through the friction roller 24a.

The swinging lever 25 has an intermediate portion supported by a support shaft 26, and a roller 25a is provided at the lower end to connect it to the connecting rod 24.
It is brought into contact with the tip of the spring 23 by means of a spring 23.

As the material W, a solid round bar wire rod and a hollow pipe can be used. In the case of a hollow pipe, as shown in FIG.
7, 28 is used. The knockout pin 41' also uses a hollow pipe.

Transfer chuck device 50 connects each chuck 5
1, 52, 53 with a constant interval S and each die 3
1, 32, etc., and are made to reciprocate left and right at the same time.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is an overall plan view, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is a sectional view taken along line B-B in Fig. 1. , FIG. 4 is an enlarged cross-sectional plan view of the cutting device section, and FIG. 5 is an enlarged cross-sectional plan view of the cutting device section in another embodiment. DESCRIPTION OF SYMBOLS 1...Moving ram, 2...Guide path, 3...Punch holder, 4...Die block, 10...Material feeding device, 20...Cutting device, 21...Quill, 22...Moving knife, 23... Spring, 24...
... Linking rod, 25 ... Swinging lever, 27, 28 ... Core metal, 30 ... Forging device, 31 ... No. 1 die, 3
2...Dice, 35...Punch, 40...Knockout device, 41...Knockout pin, 51...
...Transfer chuck, 60...Drive device, 6
3...Plate cam, 61...Crank arm, 70...
...Body frame, 71...Guide bar, W...Material, W'...Cutting material.

Claims (1)

[Claims for Utility Model Registration] (1) A material feeding device 10 that intermittently feeds a material W made of a continuous metal wire, a quill 21 and a movable knife 22 that moves across the tip of the quill. A cutting device 20 capable of cutting into a certain size, and the cut material W' are sequentially forged using dies 32 provided in a row horizontally and punches 35 provided on the movable ram 1 side so as to face each of the dies 32. The material feeding device 10 is provided at the rear of the moving ram on the punch side, and the guide passage 2 for guiding the fed material passes through the moving ram 1 and the punch holder 3 to guide it to the tip of the punch. The quill 21 is provided in the No. 1 die 31 having a built-in knockout device 40 on the die side, into which the tip of the material fed from the punch side through the movable knife 22 is fitted, and the movable knife When the quill 22 moves in the cutting direction and returns, a second die is placed between the quill 21 and the second die 32 so as to simultaneously move and carry the cut material W' extruded from the first die 31 to the second die 32. A small multi-stage forging machine characterized by being provided with a transfer chuck 51. (2) The small multi-stage forging machine according to claim 1, wherein the guide passage 2 is formed as a hollow hole through which the material W passing through can freely move. (3) The scope of the utility model registration claim, wherein the movable ram 1 is moved forward when being towed by a drive device 60 provided at the rear portion of the die side via a crank arm 61 and collides with the die. 1st
The small multi-stage forging machine described in Section 1. (4) The movable knife 22 is pushed by a plate cam 63 from a drive device 60 via a bell crank 62 against spring pressure, and then returned by the spring 63. The small multi-stage forging machine described in item 1.