JPS6076236A - Ultra-high speed straightening method of wire rod and wire rod straightener of rotary die type - Google Patents

Abstract

PURPOSE:To reduce centrifugal force, weight and size and to enable considerable increase in the number of revolutions of a spinner by constituting the spinner body in such a way that all the circumferential positions centroids over the entire axial length of the spinner body exist on a revolving shaft. CONSTITUTION:The position centroid of a straightening die device C0 exists on the revolving shaft O of a spinner when a straightening die 3 is mounted and fixed into a pushing hole 4 of which the axial line X of the guide path 31 for a wire rod is required to be set coaxially with the shaft O. The die 3 is displaced and positioned by screwing relatively oppositely tap bolts 6 and 6b screwed to the internal screw 5 of the hole 4 in the case of mounting and fixing said die into the hole 4 which is required to be set eccentrically at a prescribed value. The outside side faces of the arm parts 81, 81 of a U-shaped member of which the screw hole is screwed to the adjusting screw 602 of the bolt 6a are brought into contact with the plane wall 41 of the hole 4 and therefore the U-shaped member is regulated in turning and is displaced in the direction opposite from the screwing direction of the bolt 6a. The displacement of the U-shaped member acts as a balance weight and the position of centroid of the device C0 is thus maintained on the revolving shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ultra-high speed straightening method for wire rods and a rotating top type wire rod straightening machine.

One method for straightening the wire is to use a rotating top. In this method, a plurality of frame members, that is, correction pieces having holes through which the wire can pass, are arranged at predetermined intervals on the wire feed path and at a predetermined eccentric position from the feed path, and while the wire is allowed to run normally, The wire is straightened by rotating the straightening piece so that the feeding path is the center of rotation, and since the entire circumference of the wire comes into contact with the hole in the rotating straightening piece, it is prized as being able to straighten the wire over the entire circumference. There are nine.

One of the rotating top type wire rod straightening machines that conventionally implements this type of method.
An example is shown in FIG.

11th yen] In the VC, 10' is a spinner, and the spinner 10' has rotating shaft parts 1 at both ends of the main body 1'.
2, supported by a bearing member 13,
For example, a pulley 1 is fitted onto one rotating shaft portion 12 and connected to the drive shaft. It can be rotated by rotational driving force transmitted from a power source. The spinner main body 1' is provided with a passage over the entire length in the axial direction including both rotating shaft portions 12, 12, forming a wire passage 2'.

In the central part of the spinner main body 1', excluding the two rotating shaft parts 12, 12, there is provided a spacer extending at a predetermined interval and extending perpendicularly to the wire passage 2'.
A plurality of through holes 4' passing through the spinner main body 1' from the circumferential direction are provided, and serve as push holes for the correction pieces HjW. The straightening piece 3 is a piece material having a through hole 31 whose inner diameter changes in a predetermined manner in the axial direction and whose minimum inner diameter is set approximately equal to the diameter of the wire to be straightened, and uses this as a wire guide path. Push into the push hole 4'=! A nut member 5' is screwed into the box, for example, from both opening ends of the push-in hole 4', and is clamped and fixed between the tips of the push bolts 6'. In this case, the straightening piece 3 has the wire guide path 31 as shown in the figure, for example, the straightening piece 3a on the input side of the wire fed according to the arrow and the correction piece 3e on the exit side σ) are shown as a solid line as X, and the axial force is expressed as O with a broken line. Correcting pieces 3b, 3c, and 3d are coaxial with the axis of the wire rod passage 2' shown, that is, the rotation axis, and are located in the middle.
Then, it is mounted so that the axis X is parallel to the rotation axis OK at a predetermined eccentric position. As mentioned above, the rotating shaft O in the spinner 10' during the rotation of the wire rod to be fed rotates while maintaining the same axis as the rotating shaft O, and the rotating shaft O is also eccentrically centered and rotates twice on the circumference of a predetermined radius around the rotating shaft O. #l Correcting pieces 3a to 3e
The VC is corrected while passing through the wire guide path 31.

Therefore, in this wire straightening method using a rotating piece, while the wire passes through a plurality of straightening piece arrangement sections at a predetermined speed, the eccentric straightening piece rotates around the wire many times. It will not be possible to completely correct the entire circumference of the area. It can be said that the feeding speed of the wire rod is regulated by the number of revolutions of the straightening piece. Therefore, in order to speed up the straightening process while applying sufficient straightening to the wire, in other words, to increase the feeding speed of the wire, it is essential to increase the rotational speed of the spinner.

However, in the conventional device as shown in FIG. 1, when attempting to rotate the spinner at high speed, vibration occurs during rotation, and even when attempting to rotate at high speed, the rotational torque increases7. For example, since the size of the spinner is relatively small and the fO is high, the number of rotations is high (the possible wire diameter is about 2 mm).
．． 000~l C Increase to 1,000rpm/- CI
) is the limit, and the larger the diameter of the wire, the larger the spinner, and the above-mentioned problems become more pronounced, making it difficult to increase the number of rotations.

The present inventor has devised the present invention for the purpose of overcoming the above-mentioned current situation. For example, even when straightening a large wire rod with a wire diameter of 6 to 7 mm, the number of revolutions of the spinner is 12 + 00 Orpm/
We provide a method for straightening and hanging wire rods at an ultra-high speed with an increase of more than +mg, and a machine for carrying out the method with rotating top history wire rods.

Prior to arriving at the present invention, the inventors analyzed the causes of vibrations that impede high-speed rotation of a conventional rotating piece type wire straightening machine and the increase in rotational torque. Refer to Figure 1.The analysis results are described below.

In the conventional device shown in FIG. 1, each of the straightening pieces 3a to 3e installed at a predetermined position has a wire guide path 31 whose inner diameter varies in the axial direction depending on the position where it is installed. However, at least the upper and lower sides and the left and right sides are symmetrical with the axis of the wire material plan F8 mark 31 as the axis of symmetry.

In addition, the above-mentioned correction pieces 3 a = 3 e are each T1. The push-in bolts fi'a -5'e +:n that clamp the parts can be considered to be made of the same material. Therefore, it can be said that the members used in the straightening block mounting portion A' where the straightening block 3a is mounted are the same on both sides of the axis X of the wire guide path 31. Straightening frame layered parts B' and C' each having one straightening frame 3b-30-3d and 3e installed.
- The same applies to D' and E'.

As described above, the axis X of the wire guide path 31 is symmetrical.
Each correction piece mounting part A is composed of the same weight on the left and right sides.
'~E', but what if we look at this nine as a rotating body? In the correction piece attachment parts A' and E', the axis line of the wire guide path 31 or the rotation axis O of the spinner 10' coincides with the axis line, but in the correction piece attachment parts B', cps and D', the axis line X of the wire rod guide path 31 are eccentric with respect to the rotational axis O of the spinner 10', and not only are the eccentric directions different (the eccentric values are also different. Therefore, the correction piece attachment parts A' and E
Correction frame attachment part n/, c/ and D' except for '
During rotation, the position of one core is not located at the center of rotation, but is unevenly distributed. Therefore, when the spinner 10' rotates, n different eccentric loads are applied to each part of the spinner body 1' in the axial direction, and in the 3YC state, the spinner body 1'
is rotating, and the vine is also σ].

Therefore, different eccentric loads applied to various axial parts of the spinner main body 1' cause vibration of the spinner main body 1', and a large rotational torque is required.

The present inventor made the present invention based on the above analysis results.

The gist of the first invention of the present application is that the wire rod is provided on a wire rod feed passage, and is arranged at predetermined intervals in the axial direction within the spinner so that the wire rod running through the spinner, which is rotating with the feed passage as a rotation axis, passes through. In the case where the wire is straightened while it passes through each of the wire guide paths which are coaxial and eccentric to the rotating shaft with holes provided in the straightening pieces of the number of bales, the above-mentioned spinner The center of gravity in the circumferential direction over the entire axial length is set so that it is all on the rotation axis.

In addition to eliminating eccentric loads during rotation of the spinner,
By making Spinner as light and compact as possible,
The present invention provides an ultra-high-speed straightening method for a wire rod, characterized in that the wire rod is fed at high speed while the spinner is rotated at high speed by reducing the moment of inertia.

That is, the present invention eliminates the eccentric load in the circumferential direction of the rotating shaft that was necessarily present in the conventional device, achieves weight reduction and miniaturization, and reduces the distance r from the rotating shaft and the angular velocity W. We aim to reduce the centrifugal force FF determined by the relationship F: m, r, W2 ... curve (1), thereby eliminating the vibration that conventionally occurs when each part in the axial direction rotates while receiving different centrifugal forces,
In addition, by reducing the rotational torque, which was necessarily required to be large, it is possible to greatly increase the rotational speed of the spinner, which eliminates the conventional problem of increasing speed due to the restriction of the spinner rotational speed. He was able to achieve ultra-high-speed straightening by realizing high-speed feeding of wire rods.

Embodiment 2 (a) to 3 (a) to 3 (a) of the second invention (H) and the third invention of the apparatus for carrying out the first invention of the present application
e) K Therefore, it will be explained in detail below.

What is shown as 1 in FIGS. 2(a) and 2(b) is an example of a spinner main body used in the invention, in which a rotating shaft portion 12 is formed at both ends, and a central portion 11 excluding the rotating shaft portion 12. As shown in the figure, the spinner body 1 is formed into a predetermined shape that is at least bilaterally symmetrical with the rotation axis O as the axis of symmetry, and has the same mass distribution. The rotation axis OV
c A coaxial through hole 2 is provided as a binding material passage. The wire rod passage 2 has a predetermined inner diameter which is set to be sufficiently larger than the wire rod diameter over the entire length. The central part 11 is provided with a predetermined-shaped transparent material which extends through the wire passage 2vc from the circumferential direction of the wire passage 2vc, extending at a predetermined interval in the axial direction, and perpendicularly intersects with the wire passage 2vc, for example, parallel to the parallel outer walls of the central part 11. A plurality of holes 4 are provided to form a push-in hole for mounting a correction piece device.

The above push-in hole 4Vc is installed n 7) The M positive frame device is
It is composed of a straightening piece in which a wire guide path formed of a through hole of a predetermined shape is formed, and a mounting mechanism for mounting and fixing the straightening piece in the push-in hole 4. In this case, the axis of the wire guide path of the straightening frame is fixed so as to be coaxial with the rotation axis O and parallel to the rotation axis O according to the position of the push hole, and at a predetermined eccentricity. To implement technical ideas,
Even when the axis of the wire rod guide path 2 is coaxial with the rotation axis O, or even when the axis is eccentric by different values, the center of gravity of the straightening block device is set so as to lie on the rotation axis.

As a mounting mechanism for the correction piece to make the center of gravity position on the rotation axis, for example, the wire guide path 31 is placed at an eccentric position in advance.
is formed, and 1 (the center position is on the rotation axis O)
Ru. J: Consists of a straightening piece to which the 5KX amount distribution is set and a tensioning member that attaches and fixes the straightening piece in a fixed position, and it is also possible to straighten a specific wire rod. . However, even when straightening wires with the same wire diameter σ), the eccentricity value in straightening is so delicate that the desired straightening effect cannot be obtained unless the eccentricity is adjusted depending on the wire composition, strength, etc. Since it is impossible to correct various wire diameters with the same eccentricity value, it is difficult to say that it is practical. However, it goes without saying that the above configuration is also an embodiment within the scope of the technical idea of the present invention.

By the way, a configuration that is highly practical as a straightening block device is that a straightening block is provided with a wire guide path in the center of the block, and the wire guide path 31 is adjusted depending on the position of the push-in hole to which the correction block is installed and fixed. A corrective top mounting mechanism consisting of components that can be set so that the center of gravity of the corrective top device is located on the rotation axis at a predetermined position (can be set, and that the IC can be adjusted to make the mass distribution variable) It is preferable that

A straightening frame bond using one embodiment of the above-mentioned straightening frame mounting mechanism is shown in FIGS. 3(a) to 3(e).

A push-in hole 4 provided in the center portion 11 of the spinner body 1
A female screw structure is formed at a predetermined length from both opening end faces. In the embodiment, due to the shape and size of the members described later, the diameter of the push-in hole 4 is large when inserting the correction piece, etc., and the diameter of the push-in hole 4 is small when adjusting and fixing it in a predetermined position. It is preferable. Therefore, a male screw 502 is screwed into the male screw 501 formed directly on the end hole wall of the push hole.
is formed on the outer periphery of the nut 50, and when inserting the correction piece, etc., remove the nut 50, and after inserting the nut 50, screw in the nut 50.
The inner female screw 5 of 0 is used for position adjustment, fixation, etc. of the correction piece. The wall of the medium-heat portion of the push-in hole 4, excluding the female threaded portions 5 at both ends, is formed, for example, into a flat wall 41 extending parallel to the wire passageway 21C at a predetermined interval.

The straightening block device C8 consists of a straightening block 3 whose central part has a through hole 31 with a predetermined inner diameter set as a wire guide path, a U-shaped member 8 in end view, and two pushers of the same shape and weight. It consists of bolt u6. At least one parallel side surface 30 having the wire guide path 31 as an axis of symmetry is provided on the side surface of the straightening piece 3.
A pair is formed. The distance between the outer surfaces of the parallel arm portions 81 of the U-shaped member 8 is approximately equal to the distance between the flat walls 41, 41 of the push-in hole 4, and the distance between the inner surfaces of the straightening piece 3 is approximately equal to the distance between the flat walls 41, 41 of the push-in hole 4. The spacing between the parallel sides 30, 30 is approximately equal to the distance between the parallel sides 30, 30, as shown in FIG. 4(b). The U-shaped member 8 is accommodated between the arm portions 81 and 81 in contact with each other, and the U-shaped member 8 is mounted in the push-in hole 4 with the outer surface of the arm portions 81 and 81 in contact with the flat wall 41 of the push-in hole 4. ,
Correction piece 3 and U-shaped member 8, U-shaped member 8 and flat wall 41
The specifications of each are set so that they can slide relative to each other. In addition, a screw hole 83 is passed through the center of the connecting portion 82 that connects the arm portions 81, 81, jt, respectively, in parallel with the arm portions 81, 81. The push bolt 6 has a male thread 601 formed on the outer periphery of the head, and can be screwed into the female thread 5 of the push-in hole 4, or more precisely, the inner female thread 5 of the nut 5o. The role of the feed screw is luxurious.

The threaded portion 602 of the push bolt 6 can be screwed into the connecting portion '82Vcr & cut screw hole 83 of the mouth-shaped member 8, and functions as an adjustment screw. Therefore, the screw pitch P of g=wood screw 02 is set to twice the feed screw pitch P. Furthermore, regarding the configuration 1g, as a setting matter, the mass M of the correction piece 3, (f! Mass M?(P) of the eight-head bolt 6, and the quality 11 M of the mouth-shaped member 8, l(f') Between, M.J.
``' M + + 2・M2 ......Set so that the relationship shown in (2) is satisfied.This n is for making the mouth-shaped member 8 act as a balance weight, and its effect will be described later. .

Another setting flexibility for using the U-shaped member 8 for balance weight binding is the above-mentioned correction piece 3' (
11' Place the U-shaped member 8 between the arms & 111 and 81, push the bracket-shaped member 8 into the hole 4, and then open the hole) 50
-5 (j Push each upper hole into the opening end of hole 4 - 15 (
After narrowing the opening by screwing the nut 5
Push the feed screw 601' of built-in 6 into the internal female screw 5 of 0.
The tip of one push bolt 6a passes through the screw hole 83 of the mouth-shaped member 8 and protrudes between both arm portions 81, 81, and the other push bolt 6a is screwed together. The axis X of the wire guide path 31 of the straightening block 30 in a state where the straightening block 3 is fixedly held by the tip extending between the arms 81 and 81 of 6b (
The purpose is to set the mass distribution of the mouth-shaped member 8 coaxially with the rotation axis O as shown in cl to be the same on the upper and lower sides and on the left and right sides with the rotation axis 0 as the axis of symmetry. Since the distribution of buy 1 is the same, X-t for the upper and lower and left and right
Of course, even if the mass points are the same and the distances from the axis of symmetry are the same, the weights are also the same.

With the above configuration and settings, when the straightening block 3 is installed and fixed in the push-in hole 4 which is to be set coaxially with the axis O of the spinner 1 and the axis of the wire guide path 310, the straightening block device co as described above. The center of gravity is located on the rotation axis 0, and when mounting and fixing it in the push-in hole 4, which should be set to a predetermined eccentricity, the center of gravity is located on the rotation axis 0, and when it is installed and fixed in the push-in hole 4, as shown in FIGS. 3(d) and (e), both ends of the push-in hole 4 are Push screws 5a and 6b screwed into the female screw 5 of The mouth-shaped member 8 is screwed together.
Ha, that arm! Since the outer surfaces of 381 and 81 are in contact with the flat wall 41 of the push-in hole 4, their rotation is restricted, and they are displaced in the opposite direction to the spiraling direction of the push-in hole 6a, and the displacement value is It becomes twice the spiral value, and the displacement of the mouth-shaped member 8 acts as a balance weight from the relationship of equation (2), and the correction piece device c. maintain the center of gravity on the axis of rotation.

In the above-mentioned embodiment of the correction piece mounting mechanism, the balance weight member = the weight M4 of the U-shaped member 8 and the mass M of the push bolt 6.
, (P)# and the mass M of the correction piece 3 are expressed by the equation (2
), and the screw pitch PtY of the adjustment screw 602 is set to twice the screw pitch P of the feed screw 601. This is true if it is a wire straightening machine configured with a straightening block device having a straightening block mounting mechanism revised to n-p1.+-+(4).

In the above embodiment, the flat wall 41 is a hole wall in the center of the push-in hole 4.
We will now describe a case in which the mouth-shaped member 8 is a balance weight member, and the correction piece 3 is accommodated between the arms 81 of the mouth-shaped member 8, but is not limited to the above configuration. It's not a thing. The third invention of the present application is the balance weight member 8 which adds 7 ftfi to equations (3) and (4), and the axis X of the wire guide path 31 of the straightening piece 3 is the rotation axis O.
When K is coaxial, the mass is set to be the same on the upper and lower sides and on the left and right sides with respect to the rotation axis 0, and the movement of the center of gravity of the correction top device in which the rotation axis O also deviates by a predetermined value is set to n with respect to the movement. There is no particular limitation on the configuration as long as the center of gravity of the correcting top device is maintained on the rotation axis by correcting the balance weight member 80 by moving the weight that doubles the reverse displacement.

As described above, if the balance weight member is included as a component of the correcting block mounting M mechanism, the mass distribution can be adjusted for each correcting block device by the balance weight member, which provides flexibility and is practical.

However, even without adopting the configuration as in the third invention of the present application,
The position of the center of gravity of the correction top device should be placed on the rotation axis.
Each structure is unique. If π is exceeded, use of the above-mentioned straightening piece 3 with the wire rod guide path 31 in a fixed position, adjustment of the mass of each push bolt 6, or use of a balance weight member different from the one described above... ...For example, 4 for eccentric correction top device
For example, a member having a predetermined weight in six push bolt holes on the opposite side in the eccentric direction of the six holes is screwed. Including this configuration, at least an apparatus configured such that the center of gravity of the straightening piece device is located on the rotation axis of the spinner body 1, and such that the center of gravity of the spinner body 1 itself is located on the rotation axis. This H second invention σ] is within the range.

Since the present invention is configured such that the center of gravity in the circumferential direction over the entire axial length of the spinner main body is located on the rotation axis, it is possible to reduce the centrifugal force F, and the vibration that was present in conventional straightening machines can be reduced. By reducing the centrifugal force F, the heavy structure that was required to provide strength R and rigidity to the main body of the conventional straightening machine has been improved.
This allows the rotational torque to be small, so the rotational speed of the spinner can be increased to a wide range of 7".
It has become possible. Thus, for example, the rotational speed f l of a spinner for a large diameter wire of 6 to 7 III #I is 2.00 Or
pm/m or more, therefore, the wire feed speed is increased by 200.1 from the conventional feed speed of 100 m/m to Ts 200.
m/trim, it is possible to achieve ultra-high speed straightening of small diameter wires as well as large diameter wires, and the resulting reproductive effect is extremely remarkable.

[Brief explanation of drawings]

Figure 1 is a cross-sectional front view of a conventional rotating top type wire straightening machine;
Fig. 2(a) is a cross-sectional view of an example of the spinner body for straightening the rotating top type wire rod carried out by the uninvented method; Fig. 2(b) is -Y-line sectional view,
Fig. 3 (al is a spinner main body Q showing the structure of the actual #1 correcting block device according to the present invention) - a cross-section front view; f + congratulatory map showing the mature cable and its combination relationship, Figure 3 (c) and (d)
3(e) is a cross-sectional side view of the corrective frame device in its installed state, and FIG. 3(e) is a front view of the ρ↑ side of FIG. 3(d-). Spinner 11.
12...Medium heat part of spinner body and rotating shaft'@
2... Wire passageway 3... Straightening piece 31... Wire rod guide path of straightening piece 4... Push-in hole 5... Female screw structure of push-in hole (i, 5a, (jb... Push bolt) 6
01,602...Feed screw and adjustment screw 8...
Balance weight member 83...Threaded hole in the balance weight member O...Rotation axis of the spinner Patent attorney Den Kobayashi

Claims (1)

[Scope of Claims] l) A box provided on the wire rod feeding passage, which is arranged at a predetermined axial distance in the spinner so that the traveling wire passes through the spinner which is rotating with the feeding passage as the rotation axis. In the case where the wire is straightened while it passes through the respective wire guide paths which are concentric and eccentric to the rotating shaft provided with holes in a plurality of straightening pieces arranged in the spinner, The position of the center of gravity in the circumferential direction over the entire axial length π is set so that it is all on the rotation axis (this setting eliminates the eccentric load when the spinner rotates, and also
c! An ultra-high-speed straightening method for a wire rod, characterized in that the moment of inertia is reduced by making the wire rod f-sized and smaller so that the spinner rotates at high speed and transports the wire rod at a high speed. 2) A spinner main body having rotating shaft parts formed at both ends and having a wire passage passing through the rotating shaft part and passing through the center part, and a plurality of correction frame devices mounted at predetermined positions on the spinner main body. In the apparatus configured, the spinner main body is formed to have a predetermined shape with at least left-right symmetry and the same mass distribution, with the central portion having a rotation axis and a symmetrical axis, and
The through hole serving as the wire passage is formed coaxially with the rotating shaft over the entire length with an inner diameter sufficiently larger than the wire diameter, and a predetermined interval is provided in the axial direction in the central part excluding the rotating shaft. A plurality of transparent holes of a predetermined shape are arranged perpendicularly to the wire passageway and pass through the spinner main body from the circumferential direction to form a push-in hole for mounting the straightening block device, and the straightening block device is installed in the central portion. The rotation axis is determined by the installation position of the device, which is composed of a straightening piece in which a wire guide path consisting of a shell through hole of a predetermined shape is formed, and a mounting mechanism that can mount and fix the correction piece in a predetermined position in the push hole. In addition to being able to position and fix the straightening pieces in accordance with the axis of the wire guide path that requires coaxiality and a predetermined eccentricity, the center of gravity of each straightening piece device is on the rotation axis. A rotating top type wire rod straightening machine characterized by a distributed structure. 3) The rotary top type according to claim 2, wherein the attachment mechanism to be placed in the correction top device is composed of a construction rope with variable mass distribution, and is set to be adjustable for each of the push holes. Wire straightening machine. 4) A spinner main body having a rotating shaft portion formed at both ends and a wire passage passing through the rotating shaft portion and the center portion, and a plurality of correction frame devices mounted at predetermined positions on the spinner main body. The central part of the spinner main body is set to have a predetermined shape and the same quality that are at least symmetrical with respect to the rotation axis as an axis of symmetry, and the wire passage has an inner diameter sufficiently larger than the diameter of the edge material. It consists of a through hole formed coaxially with the rotating shaft, and a plurality of through holes of a predetermined shape are arranged in the center part at a predetermined interval in the axial direction and pass through the spinner body from the circumferential direction so as to be perpendicular to the wire passage. In this device, the push-in hole has a female screw structure for a predetermined length from both open end surfaces of the push-in hole, and the orthodontic block device is attached to the center with an inner diameter of a predetermined shape. A correction piece with a through hole as a wire guide path, and a feed screw that can be screwed into the female screw structure of the push-in hole are formed on the side periphery of the head, and the screw pinch of the screw part is n times the screw pinch of the feed screw. 2 consisting of the same shape and quantity formed on the A setting screw of
The pusher of the book has a screw hole that can be screwed into the adjustment screw of the bolt, and at least one of the pushers is screwed into the adjustment screw of the bolt, and then used with the correction piece. The balance weight member is formed into a shape that can be inserted into the push hole and cannot be rotated, and the mass M3 (r) of the balance weight member is equal to the quality of the correction piece iM+(f) and the push button/l/h. 56 Relationship with quantity M2(r) 1cX
VC is set so that M, = (M, +2・M,) Balance sea urchin in the state vc where the guideway @ is coaxial with the rotation axis, the center of gravity of the light member is on the rotation axis, and the mass distribution is vertical and horizontal with the rotation axis as the axis of symmetry. By setting z to be equal to n, the rotation m! /c, the displacement of the constant balance weight member in the push-in hole π according to the eccentricity value of the axis of the wire guide path of the straightening block maintains the center of gravity position of the straightening block device on the rotation axis. Rotating top type wire rod straightening machine.