JPH0957330A - Drawing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To draw a material to be drawn without being slipped and bent by pressing the back face of an endless chain having a jaw to grip and draw the material to be drawn and providing a rail to guide the jaw. SOLUTION: A material to be drawn A is gripped and drawn by a jaw 1. Plural numbers of jaws 1 are attached to a pair of upper and lower two series endless chains. The jaws 1 are guided horizontally by pressing the back faces of the endless chains 2 by a horizontal members 3 being moved freely up and down. The rails are provided projectingly on the central part in the longitudinal direction of the front face of the horizontal members 3. A recessed slide part is provided on the back face of a block 7 to which the jaw 1 is fixed. The slide part is slid while being engaged with the rail. The jaw 1 attached to the block 7 is guided by the rail to draw the material to be drawn A horizontally along the horizontal member 3 without causing any deviation of center.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawing machine for grasping and drawing a metal material (a material to be drawn) such as a wire or a rod passed through a die, and in particular, grips the material passed through the die with a jaw attached to an endless chain. Pertaining to a continuous drawing machine.

[0002]

2. Description of the Related Art In general, a drawing machine comprises a die for processing a metal material into a required shape, and a take-up means for gripping and drawing a metal material (a material to be drawn) of a filament passed through the die. . As a conventional take-up means, there is a method in which a leather belt is wound around the outer periphery of a timing belt, and a line is sandwiched between upper and lower leather belts. However, in this case, a speed difference occurs between the timing belt and the leather belt, and a slip also occurs between the leather belt and the filament, and the speed varies, which is not suitable for high-speed operation. Further, the leather belt is displaced in the lateral direction with respect to the traveling direction, so that the striated lines are bent, and the quality is likely to be deteriorated.

[0003] In order to increase the speed, there is an apparatus using an endless chain, and the following pickup machine is disclosed in Japanese Utility Model Publication No. 3-31460 for this pickup means. This take-up machine is provided with a pair of upper and lower endless chains 100 as shown in FIGS. 13 and 14, and the chains 100 are divided into two parts 101a, 101.
b is fixed. Then, the filament A is inserted between the tops 101a provided on the vertically arranged chain 100, the rear surfaces of the tops 101a and 101b are pressed from above and below to grasp the filament A, and the chain 100 is driven to drive the filament A. Article A is taken over.

The chain 100 has a pair of roller chains 102, in which a pin 101 is formed at the center of the pin 103.
a and 101b sandwich the pin 103, and two bolts 10
4, and bearings 105 are externally fitted and fixed on both sides of the tops 101a and 101b. Further, the bearing 105 is mounted on the connecting arm 106 by the bolt 107 when the chain 102 is driven.
While the rocking is regulated by 8, the vehicle runs by sliding on it. Therefore, the frame 101 attached to the same pin 103
The swing of a and 101b is eliminated.

With such a configuration, the frames 101a,
The part of 101b that grips the filament A is eliminated from the left and right to prevent the filament A from bending.

[0006]

However, in the above-mentioned take-up machine, the displacement of the top 101a in the lateral direction is regulated, but in the vertical direction, it is indirect via the bearings 105 and the pins 103 on both sides. If the balance of pressing the bearing 105 is lost, the horizontality of the rail 108 cannot be obtained, which causes the straightness of the filament A to decrease, and the quality of the product deteriorates.

In view of the above, it is an object of the present invention to provide a drawing machine capable of performing high-quality drawing without causing horizontal displacement while operating at high speed.

[0008]

A means for solving the problems according to the present invention is to provide a pair of upper and lower two-row endless chains having jaws (pieces) for grasping and pulling out a material to be drawn, and horizontally pressing the jaws by pressing the back surface of the endless chain. The endless chain includes a pair of front and rear plates joined by a pair of left and right pins,
It consists of a pair of front and rear rollers that are rotatably supported by pins inside the plate, and blocks that are attached to each pin between the rollers. Rails are provided to guide the jaws in a straight line in order to prevent lateral slippage of the jaws, and the block is provided with sliding portions that engage with the rails and slide to adjust tension in the traveling direction and the vertical direction of the endless chain. A tension adjusting means is provided.

As a result, the block of the endless chain is guided horizontally and in a straight line by the horizontal member, so that the straightness and levelness of the jaw are maintained. Further, even if the tension of the endless chain changes, the tension can be kept constant by adjusting the tension of the endless chain by the tension adjusting means, and the fluttering of the endless chain can be prevented.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The drawing machine of the present invention is as shown in FIG.
A pair of upper and lower two-row endless chains 2 having jaws 1 for grasping and pulling out the material to be drawn A, and a vertically movable horizontal member 3 for pressing the rear surface of the endless chains 2 to horizontally guide the jaws 1 are provided. 2 to 4, the endless chain 2 includes a pair of front and rear plates 5 coupled by a pair of left and right pins 4, and a pair of front and rear rollers 6 rotatably supported by the pins 4 inside the plates 5. When,
The block 7 is attached to each pin 4 between the rollers 6. In the endless chain 2, a connecting plate 9, a spacer 10, a roller 6, a spacer 11 and a plate 5 are sequentially arranged on both sides of a block 7, a connecting plate 12 is further arranged outside thereof, and a pin 4 is inserted in the front-rear direction. A set of two pieces are connected to each other to form a ring. Here, the problem that the jaws 1 are separated by spacing the blocks 7 by the connecting plate 12 between the plates 5 in the left-right direction and the jaws 1 are too narrow to damage the drawn material A is solved. are doing.

Then, as shown in FIG. 5, the endless chain 2 is bridged between a pair of left and right gears 20 and 21, and one of the gears 20 is a motor as a drive source installed on a table 23 of a main body 22. 24 to a transmission member 25 such as a rotary shaft and a gear
The rotational drive force is transmitted via the, and the upper and lower endless chains 2 rotate in opposite directions. In FIG. 5, 2
6 is a die device, 27 is a motor and a trochoid pump, 28 is a tank for a drawing die lubrication and cooling device, and 29 is a lubricating liquid return gutter.

The block 7 comprises a base 30 into which the pin 4 is inserted, and a jaw mounting base 32 fixed to the base 30 by bolts 31. A recess 30a is formed on the front surface side of the base 30, and the mounting table 32 is fitted into the recess 30a. The mounting table 32 is notched on the front side, and one side thereof is pressed toward the base 30 by a pressing plate 34 fixed to the base 30 by bolts 33. A dovetail groove is formed in the front-rear direction by the mounting table 32 and the pressing plate 34.

The jaw 1 is horizontally long in the left-right direction,
A semicircular linear groove 1a passing through the center in the front-rear direction is formed on the surface, through which the material A to be drawn passes. Also, the left and right ends of the jaw 1 are inclined so as to prevent the jaw 1 from coming into contact with the material A to be drawn when the upper and lower jaws 1 come into contact with and separate from each other. A is prevented from being damaged.

The lower portion of the jaw 1 has a shape corresponding to the dovetail groove, and is inserted and fixed in the dovetail groove. A stopper member 35 that restricts the position of the jaw 1 in the front-rear direction is fitted in the dovetail groove, and is fixed to the mounting base 32 by a bolt 36. That is, when fixing the jaw 1 to the block 7, the bolt 33 fixing the pressing plate 34 is loosened, the lower portion of the jaw 1 is inserted from the front side of the dovetail groove of the block 7, and the jaw 1 is fixed to the stop member 35. It is inserted until it abuts, and then it is pressed down by the pressing plate 34. As a result, the jaw 1 is positioned horizontally with respect to the block 7 and on the center in the front-rear direction.

The horizontal members 3 are flat plates whose both ends are inclined, and are arranged on the inner sides of the upper and lower endless chains 2 on the sides where the jaws 1 face each other.
As described above, the support body 40 is fixed by the bolts 41. The support body 40 is fixed to a slide body 44 that is vertically movably fitted to a support rod 43 that is vertically fixed to a frame 42.

A rail 45 is projectingly provided at the center of the surface of the horizontal member 3 in the front-rear direction, and the base 30 of the block 7 is provided.
Concave sliding part 4 that engages with the rail 45 and slides on the back surface of the
6 are formed. In addition, the roller 6 rolls on the surface of the horizontal member 3, and the block 7 is connected to the rail 4
It is guided by 5 and moves horizontally along the horizontal member 3 without decentering. Therefore, the jaw 1 moves in a straight line, and lateral deviation is prevented.

Further, a pressing means 50 for pressing the horizontal member 3 toward the back surface of the block 7 is provided in order to move the horizontal member 3 up and down to maintain the levelness. Pressing means 5
0 is a pair of right and left racks corresponding to each support body 40, and is attached to the sliding body 44, and the racks 51 and 51.
A pinion 52 that meshes with the horizontal shaft 53 to which the pinion 52 is fitted and fixed, and an air cylinder 5 that rotates the horizontal shaft 53.
4, the horizontal shaft 53 and the air cylinder 54 are connected by a crank 55, and one end of the crank 55 has a horizontal shaft 5
3 is key-fitted, and the other end is the rod 5 of the air cylinder 54.
It is rotatably supported at the tip of 4a. In addition, with respect to the upper horizontal member 3, the pinion 5 is provided in front of the horizontal axis 53.
The rack 2 and the rack 51 mesh with each other, and the lower horizontal member 3 meshes with the rear side. Then, as the rod 54a of the air cylinder 54 expands and contracts, the crank 55 rotates the horizontal shaft 53, the pinion 52 fitted and fixed to the horizontal shaft 53 rotates, and each rack meshed with the pinion 52. 51 moves up and down in the direction of approaching or separating from each other. Along with that, the horizontal members 3 slide in the vertical direction, and the horizontal members 3 arranged vertically are brought close to each other to exert a pressing force on the jaws 1 via the block 7, or are separated so that a pressing force is exerted. It will be removed. An oil cylinder may be used instead of the air cylinder 54,
The horizontal shaft 53 may be rotated by using a mechanism for limiting the driving force by the motor and the pressure by the torque limiter.

By the way, just by bridging the endless chain 2 between the gears 20 and 21, the endless chain 2 becomes loose and the jaw 1 cannot be moved horizontally. Therefore,
As tension adjusting means for adjusting the tension of the endless chain 2, two mechanisms are provided: a vertical adjusting mechanism for adjusting the vertical tension of the endless chain 2 and a lateral adjusting mechanism for adjusting the horizontal tension.

The vertical adjustment mechanism is, as shown in FIGS. 9 and 10, a pushing member 60 which is arranged with its back facing the horizontal member 3 and comes into contact with the endless chain 2, and a square screw 61 for varying the vertical position of the pushing member 60. It has and. The pushing member 60 has the same shape as that of the horizontal member 3, and as shown in FIG.
It is supported so that it can move up and down. The lower pushing member 60 is not horizontal, and the endless chain 2
Considering the sagging due to the weight, it is curved slightly downward. The square screw 61 is rotatably supported by a mounting piece 64 fixed to the frame 42 in the middle of both support rods 43, and a connecting piece 65 integrated with a support body 62 is externally fitted to the square screw 61. By rotating the knob 61a at the upper end or the lower end, the pushing member 60 moves up and down to adjust the tension of the endless chain 2. A bolt 66 for preventing loosening and a nut 67 are provided on the inner mounting piece 64, and the height of the bolt 66 is adjusted so as to abut the connecting piece 65.

As shown in FIGS. 11 and 12, the lateral adjustment mechanism moves the gear 21 in the left-right direction by a moving body 71 to which a support shaft 70 of one gear 21 is attached and a bolt 72 that moves the moving body 71 in the horizontal direction. Have moved to. The moving body 71 is slidably supported by two horizontal parallel bars 73,
One end of the parallel rod 73 is fixed to the frame 42, and the other end is fitted to an L-shaped piece 74 fixed to the frame 42.
The bolt 72 penetrates the L-shaped piece 74, and the tip thereof is in contact with the load cell 75 attached to the moving body 71. A nut 76 for preventing rotation is externally fitted to the bolt 72. Then, by rotating the bolt 72, the tip of the bolt 72 urges the moving body 71 via the load cell 75, whereby the gear 21 moves to the left and the tension of the endless chain 2 is strengthened. When weakening, the bolt 72 is turned in the opposite direction to weaken the urging force to the moving body 71. Then, the tension of the endless chain 2 is measured by the load cell 75, and the tension in the vertical direction and the lateral direction of the endless chain 2 is adjusted based on the measurement result.

As shown in FIG. 1, the drawing machine is provided with an oil mist lubrication device 80. The oil mist lubrication device 80 includes a spray nozzle 81 for spraying the oil mist in a mist state, and the spray nozzle 81. The spray nozzle 81 comprises a lubricating unit 82 such as a pump for supplying oil mist to the spray nozzle 81. The spray nozzle 81 is arranged so as to face a portion where the endless chain 2 is loosened, that is, a portion between the gear 20 and the pushing member 61. Therefore, by supplying oil to the endless chain 2, the life of the endless chain 2 can be extended.

In the above structure, the tip of the material to be drawn A that has passed through the die device 26 is inserted at a position where both jaws 1 attached to the upper and lower endless chains 2 face each other. Then, when the drawing machine is started, the endless chain 2 is rotated by the rotational driving force of the motor 24.
Further, the rod 54a of the air cylinder 54 extends and the horizontal axis 5
The rotation of 3 rotates the pinion 52 fitted and fixed to the horizontal shaft 53, and both racks 5 meshed with the pinion 52.
1 moves in the symmetrical direction. Then, by moving each horizontal member 3 in the direction of the material A to be drawn, the jaw 1 is pressed from the back surface via the block 7, and the jaw 1 is moved to the material A to be drawn.
Move while gripping with a constant pressure.

At this time, the sliding portion 46 of the block 7 attached to the endless chain 2 is guided by the rail 45 of the horizontal member 3 so that the block 7 advances horizontally and without decentering, and the tension adjusting means. As a result, the tension of the endless chain 2 is maintained, so that the jaw 1 attached to the block 7 advances in a straight line without lateral displacement. In this way, the drawn material A is pulled in the traveling direction of the endless chain 2, and the drawn material A is continuously processed into a rod shape having a high straightness.

When the drawing machine is used for a long time, the tension of the endless chain 2 is loosened and the jaw 1 cannot move horizontally. In order to prevent this, when it is determined from the measurement value of the load cell 75 that the endless chain 2 has loosened, the tension of the endless chain 2 is adjusted by the tension adjusting means. When adjusting the tension in the left-right direction, the bolt 21 is rotated to move the gear 21 left and right via the moving body 71. When adjusting the vertical tension,
By rotating the knob 61a, the square screw 61 is rotated, and the pushing member 60 is moved in the vertical direction. Therefore, the endless chain 2 does not flutter even during high speed operation.

Further, when the drawing machine is continuously driven, the jaw 1 is worn due to friction with the material A to be drawn, and it is necessary to replace it. When replacing the jaw 1, the bolt 36 fixing the holding plate 34 of the block 7 is loosened, the jaw 1 is pushed forward and removed, and a new jaw 1 is removed.
Is pushed backward so as to engage with the dovetail groove formed on the block 7, and the bolt 36 is tightened again.

As described above, since the jaw 1 is attached to the endless chain 2 via the block 7, there is no difference in speed unlike a conventional timing belt in which a leather belt is superposed and wound. , Horizontal member 3
Since the jaw 1 is pressed from the back by
Therefore, the material A to be drawn does not slip and high speed operation is possible.

Further, the rail 4 provided on the horizontal member 3
Since the sliding portion provided on the block 7 slides by engaging with the block 5, the jaw 1 moves in a straight line and horizontally, and horizontality is maintained without lateral displacement, so that the drawn material A is bent. It can be used for very high quality drawing.

Further, since the tension adjusting means is provided, adjusting the tension of the endless chain 2 eliminates looseness of the endless chain 2, and moreover,
Since the load cell is provided, the tension of the endless chain 2 can be recognized, and the tension of the endless chain 2 can be made constant by adjusting as necessary. Even when the jaw 1 is replaced due to wear, the jaw 1 is inserted into the dovetail groove of the block 7 and the bolt 36
Since it only needs to be tightened by, it can be replaced very easily and the replacement time is short.

The present invention is not limited to the above embodiment, and it goes without saying that many modifications and changes can be made to the above embodiment within the scope of the present invention. For example, the rotation of the bolt or the knob of the tension adjusting means may be performed by a motor.

[0030]

As is apparent from the above description, according to the present invention, since the jaw is attached to the endless chain through the block and the horizontal member presses the jaw from the rear surface, the jaw and the material to be drawn slip. High-speed operation is possible without Further, since the slide portion provided on the block engages with the rail provided on the horizontal member and slides, the jaw moves in a straight line and horizontally, and there is no lateral displacement, so that the drawn material does not bend. , Can perform very high quality drawing process.

Moreover, since the tension adjusting means is provided, the tension of the endless chain can be made constant, and the endless chain does not flutter and high-quality processing can be performed even at high speed operation.

[Brief description of drawings]

FIG. 1 is a front view of a drawing machine according to the present invention.

FIG. 2 is a plan view showing the structure of an endless chain.

FIG. 3 is a partially cutaway front view of the endless chain.

[Figure 4] Side view of the endless chain

FIG. 5 is a schematic plan view of a drawing machine.

FIG. 6 is a sectional view showing a horizontal member and a pushing member.

FIG. 7 is a side view of the pressing means.

FIG. 8 is a plan view of pressing means.

FIG. 9 is a side view showing the vertical adjustment mechanism.

FIG. 10 is a view showing a mounting position of a vertical adjustment mechanism.

FIG. 11 is a side view showing a lateral adjustment mechanism.

FIG. 12 is a front view showing a lateral adjustment mechanism.

FIG. 13 is a schematic view of a conventional take-up machine.

FIG. 14 is a partially cutaway view of the chain truck of the take-off machine.

[Explanation of symbols]

 1 jaw 2 endless chain 3 horizontal member 4 pin 5 plate 6 roller 7 block 45 rail 46 sliding part

Claims (1)

[Claims] 1. A pair of upper and lower two-row endless chains having jaws for grasping and pulling out a material to be drawn, and a vertically movable horizontal member for pressing the rear surface of the endless chains to horizontally guide the jaws. The endless chain is attached to each pin between a pair of front and rear plates joined by a pair of left and right pins, a pair of front and rear rollers rotatably supported by the pins inside the plates, and between the rollers. A block, the jaw is removably mounted on the surface of the block, the horizontal member is provided with a rail for guiding the jaw in a straight line to prevent lateral displacement of the jaw, and the block is A sliding part that engages with the rail and slides is provided,
A drawing machine comprising tension adjusting means for adjusting the tension of the endless chain in the traveling direction and the vertical direction.