JPH10277631A - Stretcher mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out high-speed operation by increasing tensile force which acts on endless chains. SOLUTION: A pair of two upper and lower endless chains 2 having a jaw 1 for grasping a material A to be stretched and drawing it out consist of a block 7 on the upside of which the jaw 1 is mounted freely attachably and detachably, a pair of right and left 1st rollers 20 for pulling which are freely rotatably supported before and after the block 7, plate 21 for connecting a pair of the 1st rollers 20 and a pair of right and left 2nd rollers 22 for press- contacting which are freely rotatably supported at the underside of the block 7. The 2nd rollers 22 are rolled on a horizontal member 3.

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, and a top divided into two parts is fixed to the chains. Then, the wire is inserted between the frames provided on the vertically arranged chains, the back surface of the frame is pressed from above and below, the wire is gripped, and the wire is pulled by driving the chain.

Since the bearings fixed on both sides of the top slide while sliding on the rail while being restricted by the rail, the top does not swing. This eliminates the left and right displacement of the part holding the line of the frame and prevents the line from bending.

[0005]

However, in the above-mentioned take-up machine, the displacement of the frame in the horizontal direction is restricted, but in the vertical direction, the frame is indirectly pressed via the bearings on both sides. Therefore, if the balance of pressing the bearings is lost, the horizontality of the rails cannot be obtained, causing the straightness of the filaments to be reduced, and the quality of the product to be reduced.

Accordingly, the present applicant has filed Japanese Patent Application No. 7-2103.
No. 60 proposed a drawing machine which can perform high-quality drawing without horizontal displacement while running at high speed.

More specifically, as shown in FIG. 8, a pair of upper and lower endless chains 2 having a pair of upper and lower jaws 1 for gripping and drawing the material A to be drawn, and a vertical movement for pressing the back surface of the endless chain 2 to guide the jaws 1 horizontally. The endless chain 2 comprises a pair of front and rear plates 5 connected by a pair of left and right pins 4 as shown in FIG.
It comprises a pair of front and rear rollers 6 rotatably supported by the pins 4 inside the plate 5, and a block 7 attached to each pin 4 between the rollers 6. The endless chain 2 has a connecting plate 9, a spacer 10,
The roller 6, the spacer 11, and the plate 5 are arranged in order,
Further, a connecting plate 12 is disposed outside the connecting plate 12, and a pair of the pins 4 having the pins 4 inserted in the front-rear direction is connected to each other to form a ring.

A jaw 1 is removably mounted on the surface of the block 7 and a rail 13 for guiding the jaw 1 straight to the horizontal member 3 in order to prevent the jaw 1 from laterally shifting.
The block 7 is provided with a sliding portion 14 that engages with the rail 13 and slides. In the figure, 15 is a die, 16 is an oil mist lubrication device, 17 is a spray nozzle, 18 is a lubrication unit, and 19 is a sprocket.

As a result, the block 7 of the endless chain 2 is guided horizontally and in a straight line by the horizontal member 3, and the straightness and the levelness of the jaw 1 are maintained.

By the way, in the endless chain 2 having the above structure, a horizontal pulling force and a vertical pressing force are applied to one kind of the roller 6, so that a large pulling force cannot be applied to the endless chain 2. If this tensile force can be increased, faster high-speed operation becomes possible.

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

[0012]

The object of the present invention is to provide a pair of upper and lower endless chains having jaws for grasping and drawing a material to be drawn, and to guide the jaws horizontally by pressing the back surface of the endless chains. The endless chain comprises a block having a jaw detachably mounted on the upper side, a pair of left and right pulling rollers rotatably supported before and after the block, and It comprises a plate for connecting the rollers and a pressure contact roller rotatably supported below the block.

[0013] Therefore, the endless chain is advanced by the pulling roller being pulled by the sprocket. At this time, since the pressing roller rolls while contacting the horizontal member, the upper and lower jaws are pressed, the material to be drawn can be reliably grasped, no slip occurs with the material to be drawn, and high-speed operation is performed. It can be performed.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A drawing machine according to an embodiment of the present invention has the same basic structure as that described in Japanese Patent Application No. Hei 7-210360, and as shown in FIG. It comprises a pair of upper and lower two-endless endless chains 2 having jaws 1 to be gripped and pulled out, and a vertically movable horizontal member 3 for pressing the back surface of the endless chains 2 to guide the jaws 1 horizontally.

As shown in FIGS. 1 and 2, the endless chain 2 of the present embodiment has a block 7 on which the jaw 1 is detachably mounted on the upper side, and a pair of left and right rotatably supported back and forth of the block 7. The first roller 20 includes a first roller 20 for pulling, a plate 21 for connecting the pair of first rollers 20, and a pair of left and right second pressure rollers 22 supported rotatably below the block 7.

The block 7 includes a base 30 on which the rollers 20 and 22 are mounted, and a mounting table 32 for mounting a jaw fixed to the base 30 with bolts 31. A recess 30a is formed on the upper 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 holding plate 34.

The jaw 1 is horizontally elongated in the left-right direction, and has three parallel semicircular straight grooves 1a on the surface at equal intervals in the left-right direction.
Are formed. The radius of each straight groove 1a is different, and the material A passes through one straight groove 1a selected according to the thickness of the material A to be drawn. 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 stop member 35 for regulating the position of the jaw 1 in the front-rear direction is fitted into the dovetail groove, and is fixed to the mounting table 32 by a bolt 36. That is, when fixing the jaw 1 to the block 7, the bolt 33 fixing the holding plate 34 is loosened, the lower part of the jaw 1 is inserted from the front side of the dovetail groove of the block 7, and the jaw 1 is After being inserted until it abuts, it is held down by the holding plate 34 and the jaw 1
Is stopped by a bolt 37 penetrating in the front-rear direction.
Fixed to 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 first roller 20 is provided on the base 30 of the block 7.
And is rotatably loosely fitted to a pin 38 projecting from the side in the front-rear direction, and both sides thereof are sandwiched by the plate 21. Then, a connection plate 39 is interposed between the first roller 20 and the plate 21, whereby the connection plate 39 is connected to the first roller 20 of the adjacent block 7, whereby the endless chain 2 is formed into a ring shape. Becomes

The second roller 22 is housed in a recess 40 formed below the base 30 and is rotatably supported via a bearing 42 on a support shaft 41 penetrating the base 30. A groove 22a is formed on the surface of the roller 22 in the circumferential direction.

The endless chain 2 is bridged between a pair of left and right sprockets 43 and 44, and one of the sprockets 43 is provided with a rotating shaft, The rotational driving force is transmitted through a transmission member 45 such as a gear,
The upper and lower endless chains 2 are pulled by
Rotate in opposite directions.

The horizontal member 3 is a flat plate having both ends inclined. The horizontal member 3 is disposed on the inner side of the upper and lower endless chains 2 on the sides where the jaws 1 face each other. As shown in FIGS. Is fixed. The support 46 is fixed to a slide 48 that is vertically movably fitted to a support rod 47 fixed to the main body frame X in the vertical direction.

A rail 49 protrudes from the front surface of the horizontal member 3 at the center in the front-rear direction.
2a is engaged, and the second roller 22 rolls on the surface of the horizontal member 3. Therefore, the block 7 is guided by the rail 49 and moves horizontally along the horizontal member 3 without decentering.
Progresses in a straight line, preventing lateral displacement.

Further, a pressing means 50 for pressing the horizontal member 3 toward the back surface of the block 7 is provided to move the horizontal member 3 up and down to maintain the horizontal level. Pressing means 5
Reference numeral 0 denotes a pair of left and right sides corresponding to each of the supports 46, a rack 51 attached to the slide 48, a pinion 52 meshing with the rack 51, and a horizontal shaft 53 to which the pinion 52 is externally fixed. The horizontal shaft 53 and the cylinder 54 are connected by a crank 55. One end of the crank 55 is key-fitted to the horizontal shaft 53, and the other end is a tip of a rod 54a of the cylinder 54. Is rotatably supported. Note that the pinion 52 and the rack 51 are located on the front side of the horizontal shaft 53 with respect to the upper horizontal member 3.
Are arranged so as to mesh with the lower horizontal member 3 on the rear side.

When the rod 54a of the cylinder 54 expands and contracts, the crank 55 rotates the horizontal shaft 53, and the pinion 52 fitted and fixed to the horizontal shaft 53 rotates.
The racks 51 meshing with the pinion 52 move up and down in a direction approaching or separating from each other. Accordingly, the horizontal member 3 slides in the vertical direction. When the horizontal members 3 arranged vertically are close to each other, a pressing force is applied to the jaw 1 via the block 7, and when the horizontal members 3 are separated from each other, the pressing force is removed. The material A to be drawn can be inserted between the upper and lower jaws 1. Note that, instead of the cylinder 54, the horizontal shaft 53 may be rotated using a mechanism for limiting the driving force by a motor and the pressure by a torque limiter.

Here, by moving the horizontal member 3 up and down,
When the endless chain 2 is in an open state, the tension applied to the endless chain 2 is lost, so that the lower side of the endless chain 2 is bent by its own weight. Therefore, in order to prevent the lower side of the endless chain 2 from bending, a lifting member 56 for lifting the first roller 20 is attached to the upper support 46, and the first roller 20 moves on the lifting member 56. To roll. The lower endless chain 2
Also, a similar lifting member 56 is provided on the lower portion. The lifting member 56 also serves to guide the first roller 20 horizontally during operation of the drawing machine.

Also, the endless chain 2 is loosened only by bridging the two sprockets 43 and 44,
The jaw 1 cannot be moved horizontally. Therefore, two mechanisms are provided as tension adjusting means for adjusting the tension of the endless chain 2, a vertical adjusting mechanism for adjusting the vertical tension of the endless chain 2, and a horizontal adjusting mechanism for adjusting the horizontal tension. .

The vertical adjustment mechanism is, as shown in FIG.
The pusher 60 includes a push member 60 arranged to face the endless chain 2 and a square screw 61 for changing the vertical position of the push member 60. The pressing member 60 has the same shape as the horizontal member 3, and supports the support member 62, similarly to the horizontal member 3.
It is supported by a support rod 47 via a slide 63 so as to be vertically movable. The square screw 61 is rotatably supported by a mounting piece 64 fixed to the main body frame X in the middle of the two supporting rods 47, and a connection piece 65 integrated with the support body 62 is externally fitted to the square screw 61. By rotating the square screw 61, the pushing member 60 moves up and down together with the connecting piece 65 to adjust the tension of the endless chain 2. In addition, the inner mounting piece 6
4 is provided with a bolt 66 and a nut 67 for preventing loosening,
The height of the bolt 66 is adjusted so as to abut the connecting piece 65.

The lateral adjustment mechanism moves the support shaft 70 of one of the sprockets 44 left and right. The support shaft 70 is supported movably in the left-right direction.
By turning 1, the moving body to which the support shaft 70 is attached moves. When the sprocket 44 is moved to the left, the tension of the endless chain 2 increases. When weakening, the bolt 71 may be turned in the opposite direction.

The body frame X is mounted on a rail 73 on a base 72 so as to be movable in the front-rear direction, and is moved by a cylinder or a motor. At this time,
The movement amount of the main body frame X corresponds to the interval between the respective linear grooves 1a of the jaw 1, and an appropriate linear groove 1a is selected by the movement of the main body frame X. In order to fix the main body frame X at that position when the main frame X moves, pins are provided on the main body frame X so as to be vertically movable, and three holes for engaging the pins with the base 72 are provided at regular intervals. Note that 74
Is a restriction piece for restricting the movement of the main body frame X so as not to move too much.

In the above configuration, the endless chain 2 is first opened. At this time, the first roller 20 is lifted by the lifting member 56 so as not to be in the way when inserting the material A to be drawn. Then, as shown in FIG. 7, the tip of the drawing target material A inserted into the die is sandwiched between the tons 75, and the claws 77 attached to the tons 75 via the chain 76 are hooked on the blocks 7. Here, when the endless chain 2 is driven, the material A to be drawn is drawn between the upper and lower endless chains 2 as the endless chain 2 advances. When the tons 75 pass between the endless chains 2, the jaws 1 are pressed from the back surface through the block 7 by moving the horizontal members 3 in the direction of the material A to be drawn, and the material A is drawn into the linear grooves 1a. , And the jaw 1 moves while gripping the drawing target material A with a constant pressure. The tongs 75 naturally comes off the endless chain 2 by its own weight as the endless chain 2 advances. By moving the main body frame X in the front-rear direction, the straight groove 1a corresponding to the material A to be drawn is selected in advance.

At this time, the first roller 20 of the endless chain 2 is pulled by the sprockets 43 and 44, and the second roller 22 is pressed against the horizontal member 3 and guided by the rail 49 while the block 7 is horizontally and centered. The jaw 1 attached to the block 7 travels straight without any lateral displacement since the endless chain 2 is maintained in tension by the tension adjusting means. In this way, the material A to be drawn is pulled in the traveling direction of the endless chain 2, and the material A to be drawn is continuously processed into a highly straight bar shape.

Thus, the pulling force and the pressing force with respect to the endless chain 2 are applied to the separate rollers 20, 22 respectively.
Each roller 20, 2
2 can be reduced, and a larger load can be applied. Therefore, it is possible to increase the tensile force from 1 ton to 5 ton in the past, and it is possible to perform the drawing at a higher speed. In addition, it is possible to process a thicker drawing target material A.

When the drawing machine has been used for a long time, the tension of the endless chain 2 is loosened, and the jaw 1 does not move horizontally. In order to prevent this, the tension of the endless chain 2 is adjusted by the tension adjusting means. To adjust the tension in the left-right direction, turn the bolt 71 to
0 is moved left and right. When adjusting the tension in the vertical direction, the square screw 61 is turned to move the pressing member 60 in the vertical direction. Therefore, the endless chain 2 does not flutter even at 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 needs to be replaced. 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. Therefore, the jaw 1 can be easily replaced, and the replacement time can be reduced.

It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that many modifications and changes can be made to the above-described embodiment within the scope of the present invention. For example, a plurality of dies may be used, and two or three to-be-drawn materials may be simultaneously drawn using the effect of increasing the tensile force of the endless chain.

[0037]

As is apparent from the above description, according to the present invention, a pair of upper and lower endless chains having jaws for grasping and drawing a material to be drawn are provided with a tension roller and a pressure roller. The pulling force and the pressing force on the endless chain can be shared and assigned to different rollers. Therefore, the load applied to each roller can be reduced, and a larger load can be applied, so that the drawing process can be performed at a higher speed. In addition, since the pressing roller rolls while contacting the horizontal member, the upper and lower jaws are pressed, and the material to be drawn can be reliably grasped. Driving can be performed.

[Brief description of the drawings]

FIG. 1 shows an endless chain according to an embodiment of the present invention, wherein (a) is a side sectional view and (b) is a front sectional view.

FIG. 2 is a plan view of an endless chain.

FIG. 3 is a front view of the drawing machine.

FIG. 4 is a sectional view of a main part of the drawing machine.

FIG. 5 is a sectional view showing a horizontal member and a pushing member.

FIG. 6 is a view showing a vertical adjustment mechanism.

FIG. 7 is a diagram showing a state when a material to be drawn is gripped.

FIG. 8 is a front view of a conventional drawing machine.

FIG. 9 is a side view of the endless chain.

[Explanation of symbols]

 Reference Signs List 1 jaw 1a linear groove 2 endless chain 3 horizontal member 7 block 20 first roller 22 second roller 49 rail

Claims (1)

[Claims] 1. An endless chain comprising: a pair of upper and lower endless chains having jaws for gripping and drawing a material to be drawn and a vertically movable horizontal member for pressing a back surface of the endless chains to guide the jaws horizontally. The chain has a block with a jaw detachably mounted on the upper side,
A pair of left and right pulling rollers rotatably supported before and after the block, and a plate connecting the pair of rollers,
A drawing machine, comprising: a pressing roller rotatably supported below the block, wherein the roller rolls while contacting the horizontal member.