JPS62277209A - Machining method for nodal groove of roll - Google Patents

Abstract

PURPOSE:To machine a nodal groove on the shoulder part of a caliber with less depth than on the bottom part thereof, and reduce the abrasion or the deformation of a roll by tilting an end mill, moving the oscillation center thereof to a contracted diameter position forward of caliber center and oscillating the end mill about said position. CONSTITUTION:An end mill 34 is oscillated about a contracted diameter position P' forward of the center P of a caliber 9 by numerical control and a nodal groove 33 is machined on the bottom part 9b of the caliber 9 within a range Q2 wherein the back of the end mill 34 does not touch a caliber shoulder 9a. The maximum angular position of cutting edge center in the range Q2 is taken as a machining mode change point b (c) and the center of oscillation is moved along a locus l(l') so that the cutting edge will reach a machining start (finish) point a (d), thereby machining a nodal groove 33 on the shoulder part 9a with less height than on the bottom part 9b. Corrugated and screw-shaped nodal grooves 33 can be machined with a roll 11 rotating, synchronized with the oscillation of the end mill 34. Consequently, the nodal part of a product comes to have less deformation and burrs due to raising in a rolling process and the service life of the roll 11 is extended.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a method of machining knot grooves in the caliber of a rolling roll using an end mill.

(Prior art) Conventionally, various irregular shapes such as corrugated nodes, parallel nodes, screw-shaped nodes, etc. were formed on steel bars for the purpose of providing reinforcement with concrete and ease of construction. Steel bars are proposed.

By the way, in order to roll such a deformed steel bar, it is necessary to process a portion of the caliber of the rolling roll for forming knots in the steel bar.

Conventionally, the electric discharge machining method has been generally adopted as a method for machining this part, but combined with the low machinability of electric discharge machining, the machining time is long, so a large number of spare rolling rolls are required. It was necessary to hold it.

In addition, when re-grinding a rolling roll during repeated use, in order to divide the roll's outer circumferential surface into equal parts, the outer diameter is naturally constrained, so the amount of cutting is inevitably large. This has led to an increase in production costs due to an increase in roll costs that account for rolling costs.

From this point of view, instead of the electric discharge machining method described above, a mechanical cutting method has been studied. Due to the unique nature of machining, machining is extremely difficult and requires a long machining time.

In order to solve this problem, the applicant first made it possible to accurately and quickly process corrugated and screw-shaped parts in addition to parallel joint parts on the caliber of a rolling roll. A method for processing mill roll knots was proposed.

(Object of the Invention) The present invention relates to an improvement in the method for processing the knots of a roll, which enables stabilization of product quality, improved durability of the roll, and cost reduction. The purpose is to provide a method.

(Structure of the Invention) Therefore, the first aspect of the present invention is a method of machining a part on a caliber of a rolling roll using an end mill, in which the diameter reduction position in front of the center of the caliber is the pivot center, and the rear part of the caliber is A process of machining a part on the bottom of the caliber while swinging the end mill within an angle range that does not contact the shoulder of the caliber;
Tilt the end mill at an angle where the rear part does not contact the shoulder of the caliber, and while moving the center of swing of the end mill along a predetermined trajectory with respect to the diameter reduction position, attach the shoulder of the caliber to a surface shallower than the bottom of the caliber. The structure consists of a step of machining the part.

Further, the second invention includes, in addition to the first invention,
This configuration includes a step of rotating a rolling roll in synchronization with each of the above steps.

(Effects of the Invention) According to the first aspect of the present invention, while swinging the end mill, the center of swing of the end mill is set at a reduced diameter position in front of the center of the caliber, and along a predetermined trajectory with respect to this reduced diameter position. By moving the caliber, a surface of the required depth is machined on the bottom of the caliber, and a surface shallower than the bottom surface of the caliber is machined on the shoulder of the caliber, so it is possible to create parallel joints. parts can be processed accurately and quickly.

In addition, since the surface of the shoulder of the caliber is made shallower than the surface of the required depth of the bottom of the caliber, there is no risk of deformation caused by kicking up the joints of the product during rolling.
(a/j=l)−? 〆t? C E1 +t +L
Abrasion, deformation, etc. of Ma3 are reduced and durability is improved, and at the same time, the yield of corner joints of the product is improved.

Furthermore, since it is not necessary to completely remove the part when the rolling roll is used repeatedly, the amount of outer diameter cutting is reduced, and the cost of the roll is reduced.

According to the second invention, while swinging the end mill, the center of swing of the end mill is moved to a reduced diameter position in front of the center of the caliber and along a predetermined trajectory with respect to this reduced diameter position. Since the rolling rolls are rotated synchronously, the effect of the first invention can also be applied to corrugated or screw-shaped parts.

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, a base (bed) 12 that supports a rolling roll 11 is installed on a work floor 10,
A spindle head 14 including a spindle 13 that supports one end 11a of the rolling roll 11 is provided on one side (left side) of the base 12, and a spindle head 14 including a spindle 13 that supports one end 11a of the rolling roll 11 is provided on the other side (right side) of the base 12. A tail stock 16 is provided with a center shaft 15 that supports the other end flb of the tail stock 11.

The main shaft 13 and one end 11a of the rolling roll 11 are connected by a connecting fitting 17 (see FIG. 4), and when the main shaft 13 is driven by the main shaft motor 18, the rolling roll
is rotated at a predetermined speed.

A rail portion 20 extending parallel to the roll roll 11 is formed on the base I2, and a parallel movement table 21 is supported on the rail portion 20 so as to be able to reciprocate in a direction parallel to the roll roll 11. ing.

The parallel movement table 2I is connected to a screw shaft 23 driven by a parallel movement motor 22 installed on the other side (right side) of the base.
3, the parallel moving table 21 is moved back and forth at a predetermined speed.

A rail portion 25 extending perpendicularly to the rolling roll 11 is formed on the parallel moving table 21, and a rectangular moving table 26 is supported on the rail portion 25 so as to be able to reciprocate in the direction perpendicular to the rolling roll 11. has been done.

The orthogonal moving table 26 is connected to a screw shaft (not shown) that is driven by a orthogonal moving motor 27 installed at the bottom of the parallel moving table 21, and by driving the orthogonal moving motor 27,
The screw shaft allows the right angle moving table 26 to be reciprocated at a predetermined speed.

As shown in FIG. 3, FIG. 4, and FIG. A rocking table 29 is supported which can swing back and forth in the horizontal direction.

The rocking table 29 has a pinion 31 (see FIG. 8) driven by a rocking motor 30 installed at the rear of the rocking table 29.
It is meshed with a semicircular gear 32 mounted on the right-angle moving table 26, and when the swing motor 30 is driven, the swing table 29 is moved around the swing shaft 28 by the planetary rotation movement of the pinion 31.
It is designed to swing back and forth at a predetermined speed around the center.

The details of the right angle moving table 26 and the swinging table 29 will be explained later with reference to FIGS. 7 and 8.

On the rocking table 29, an end mill 34 for machining a corrugated box cargo 33 (C) as shown in FIGS. 6(a) and 6(b), for example, is mounted on the caliber 9 of the rolling roll 11 using a chuck 35.
A rotatably supported head 36 is attached via.

As shown in FIG. 3, the center EC of the end mill 34 supported by the chuck 35 is set to coincide with the center RC of the rolling roll 11.

The end mill 34 is rotated at a predetermined speed by a cutter motor 37 installed at the rear of the head 36.

The end mill 34 has a chamfered portion (a first
0) 34a is preferably formed.

Note that details of the head 36 will be explained later with reference to FIG. 9.

As shown in detail in FIGS. 7 and 8, the right-angle moving table 26 is formed in a semicircular shape centered on a swing shaft 28 (see FIG. 5), and on the right-angle moving table 26, The semicircular gear 32 centered around the swing shaft 28 is attached (see the same figure).

The center hole 29a at the tip of the rocking table 29 is connected to the rocking shaft 29.
At the same time, the hook 29b at the rear lower part is engaged with the outer circumferential groove 26a of the right-angle moving table 26, and the right-angled moving table 2
6, it slides in the horizontal direction with respect to the rolling roll 11 and swings back and forth.

The rocking table 29 is provided with a horizontal shaft 40 supported by bearing members 39 and 39, the horizontal shaft 40 is connected to the rocking motor 30, and a worm 41 is connected to the horizontal shaft 40. is formed.

Further, the rocking table 29 is provided with a vertical shaft 43 supported by bearing members 42, 42, and the vertical shaft 43 is connected to the worm 4! of the horizontal shaft 40. Worm wheel 44 that meshes with
is formed, and the pinion 31 that meshes with the semicircular gear 32 is fixed to the lower part of the horizontal shaft 40.

Therefore, when the swing motor 30 is driven, the horizontal axis 40 .
Warm 41. The pinion 31 is rotated via the worm wheel 44° vertical shaft 43, and the pinion 31 performs planetary rotation while meshing with the semicircular gear 32.
The rocking table 29 comes to swing back and forth in the horizontal direction with respect to the rolling roll 11 about the rocking shaft 28 .

As shown in detail in FIG. 9, the shaft portion 35a of the chuck 35 is supported by a sliding sleeve 46 via bearing members 47, 47 at the front portion of the head 36, and the shaft portion 35a of the chuck 35 is supported at the rear portion of the head 36. is a bearing member 48. coaxially with the shaft portion 35a of the chuck 35. A hollow rotating shaft 49 supported by .

The gear 51 attached to the hollow rotating shaft 49 and the gear 53 of the output shaft 52 of the cutter motor 37 are connected to a gear system 54.
are connected.

At the top of the head 36 is a screw shaft 57 supported by a bearing member 56 in parallel with the chuck 35 and the four hollow rotating shafts.
is provided, and the bevel gear 59 of the screw shaft 57 is connected to the head 36.
Handle shaft 6 of handmade handle 60 provided on the top surface of
The screw shaft 57 is meshed with the bevel gear 62 of No. 1.
The female screw block 63 is engaged with the sliding sleeve 4.
Connected to the rear of 6.

Therefore, when the manual handle 60 is rotated, the handle shaft 61 . Bevel gear 62. Screw shaft 57 via bevel gear 59
is rotated, and the chuck 35 is moved back and forth by the sliding sleeve 46 via the female thread block 63 by the threaded shaft 57, so that the extended position of the end mill 34 can be adjusted.

Also, when the cutter motor 37 is driven, the gear 53.5
The end mill 34 is rotated by the chuck 35 via the L hollow rotating shaft 49 and the serration portion 50.

Returning to FIGS. 1 and 2, the parallel movement table 21 is provided with an operation panel 65 for controlling each motor 18, 22, 27, 30, etc., and the operation panel 65 is a control (NG) device. 66
is connected to.

As shown in FIG. 10, the control device 66 is configured to set the end mill 34 at an angle at which the rear part thereof does not come into contact with the caliber shoulder 9a, with the end mill 34 pivoting at a diameter reduction position P° in front of the center P of the caliber 9. The rocking table 2 is configured to swing within the range θ.
9 and the end mill 3.
a circuit device B that controls the relative movement amount of the orthogonal moving table 26 and the parallel moving table 21 so that the swing center of the frame 4 moves along a predetermined trajectory σ, e'' with respect to the diameter-reduced position P°; , the rotation angle R of the rolling roll 11 is adjusted in synchronization with the movement amount of the parallel movement table 21 and the orthogonal movement table 26 and the swing angle of the rocking table 29.
A circuit device C for controlling (see FIG. 14) is built-in.

Next, the oscillations θ1 to θ3 of the end mill 34 and the movement trajectory L
The relationship with R' will be explained.

As shown in FIG. 10, the end mill 34 is
With the diameter reduction position P° in front of the center P as the pivot center,
When the end mill 34 is oscillated with the radius r set to cut into the inner peripheral surface of the caliber 9 to a predetermined depth, the angle range (oscillation machining range) θ in which the rear part of the end mill 34 does not come into contact with the caliber shoulder 9a, In this step, a portion 33 can be formed on the caliber bottom portion 9b.

However, if the end mill 34 is further swung within the angular range (movement angle range) θ1 or θ in this state, the rear part of the end mill 34 will come into contact with the caliber shoulder 9a.
In this state, it is not possible to process the portion 33 on the caliber shoulder portion 9a.

Therefore, the position of the maximum angle of the center of the cutting edge in the angle range θ2 of the end mill 34 is set as the machining mode change point b(c), and when the end mill 34 is in this maximum angle state, the center of the cutting edge is the machining mode change point b(c). ) to start (end) processing.
When the swing center of the end mill 34 is moved along a predetermined trajectory &(12') so as to reach point a(d) (see the two-dot chain line), the part 33 is machined on the caliber shoulders 9a, 9a. Can be done.

The end mill 34 includes the above-mentioned moving tables 21 and 26 and the rocking table 2.
9, the control device 66, etc., and is actually controlled as follows.

In FIG. 1I (a), the parallel movement table 2I is moved to the right,
The right-angle moving table 26 is moved backward, the rocking table 29 is rocked to the right, and the rocking center of the end mill 34 is at the 21st point (preparation position).

In FIG. 11(b), the right angle moving table 26 is moved forward by X1, and the swing center of the end mill 34 is set at 22 points (starting position).
move it to

At this position, the center of the cutting edge of the end mill 34 coincides with the machining start point a.

In FIG. 1I (C), while moving the rectangular moving table 26 further forward X, the parallel moving table 21 is moved to the left by Z/2, and the swing center of the end mill 34 is moved from point 22 on the trajectory Q to the diameter reduction position P. °, the center of the cutting edge of the end mill 34 moves in the machining range θ from the machining start point a to the machining mode change point, and the center of the cutting edge of the end mill 34 moves to the right caliber shoulder 9a at the caliber bottom 9b (described later). A portion 33 shallower than the surface 33 is processed.

In FIG. 1I(d) to FIG. 1I(e), the rocking table 29
to the left to move the end mill 34 to the reduced diameter position P.

When the end mill 34 is oscillated as a fulcrum, the center of the cutting edge of the end mill 34 moves in the oscillating machining range θ from the machining mode change point to the machining mode change point C, and the part 33 is machined on the caliber bottom 9b. Ru.

In FIG. 11 (D, the parallel moving table 21 is moved to the left by Z/2 while the orthogonal moving table 26 is moved backward by
When the end mill 34 is moved to the end position), the center of the cutting edge of the end mill 34 moves in the movement processing range θ3 from the processing mode change point C to the processing end change point d, and the left caliber shoulder 9a
Next, a surface 33 shallower than the surface 33 of the bottom portion 9b described above is processed.

In FIG. 11(g), the right-angle moving table 26 is moved backward X to move the swing center of the end mill 34 to point 24 (retracted position).

After that, the parallel movement table 21 is moved to the right (Z), the swing table 29 is moved to the right, and the center of swing of the end mill 34 is returned to point 21 (preparation position), resulting in the state shown in FIG. 11(a). .

Instead of the present control method described above, the end mill 34 is swung at the center of the caliber C and P as a fulcrum instead of the diameter reduction center P' to machine the surface 33 on the caliber bottom 9b, and the end mill 34 The center of oscillation is the trajectory ρ from the caliber center P instead of the diameter reduction center P°.

In the control method of machining the part 33 on the caliber shoulder parts 9a, 9a by moving at ρ', as shown by cross hunting in FIG.
Since the box loading depths of a and 9a were the same, the joints of the product during rolling were kicked up and deformed, and the wear of the rolling roll 11 increased, reducing durability. Moreover, when the rolling roll 11 is used repeatedly, it is necessary to completely remove the part, which causes problems such as increased roll cost.

However, according to the present control method, the above-mentioned problem is solved because the loading depth of the caliber shoulders 9a, 9a is made shallower than that of the caliber bottom 9b.

11(a) to 11(b) show the parallel groove 33 (
A'V, hn''r-t-;i*600)'y i I,
? -t-'s anno l'' 2fmWt33
(B), the corrugated portion surfaces 33(C) and 33(D) are processed by rotating the rolling rolls 11 synchronously based on the processing procedure for the parallel portion groove 33(A).

The details will be explained later.

To set the extension amount (cutting amount) of the end mill 34, as shown in FIG. guess, then the first
As shown in Fig. 2(b), remove the gauge 71 from the chuck 70, advance the end mill 34 by the radius of the gauge 71, and align the cutting edge of the end mill 34 with the diameter reduction position P'. ), when the end mill 34 is advanced to the radius r (see Fig. 1O), the center of swing of the end mill 34 coincides with the diameter reduction position P°.

The processing procedures for the various parts M33(A) to 33(C) will be explained below.

(+) Machining procedure for parallel groove 33(A) As shown in FIG. 13, in the case of parallel groove 33(A),
) to Fig. 11(g), move the swing center of the end mill 34 from point 21 to point 22, move it from point 22 along the trajectory Q to the reduced diameter position P', and move it to the machining start point a. A shallow knot groove is machined in the caliber shoulder (right) 9a in the moving machining range θ1 from to the machining mode change point, and then the end mill 34 is swung around the diameter reduction position P° as the oscillating center. Machining the required depth on the caliber bottom 9b in the oscillating machining range θ from the mode change point to the machining mode change point C, and furthermore, move the oscillation center of the end mill 34 up to 23 points on the trajectory Q'. Move the caliber shoulder (left) 9 in the moving machining range θ3 from the machining mode change point C to the machining end point d.
Machining the shallow part on a.

Then, while moving the swing center of the end mill 34 from point 24 to point P, the rolling roll It is moved to the parallel section 'fI.
Rotate by one pitch of t33(A) and repeat the above procedure.

(2) Processing procedure for threaded groove 33(B) As shown in FIG.
), the swing center of the end mill 3/1 is moved from point 21 to point 27, and from point 26, the trajectory ρ Diameter reduction position P
At the same time, the rolling roll 11 is rotated by the rotation amount R.
1, rotate it, and machine a shallow upward-left part on the caliber shoulder (right) 9a in the moving machining range θ from the machining start point a to the machining mode change point, and then turn the end mill 34 to reduce the diameter. At the same time as swinging with position P° as the swinging fulcrum,
The rolling roll 11 is rotated by the rotation amount R7, and the swinging machining range θ is obtained from the machining mode change point to the machining mode change point C.
, to machine the caliber bottom 9b to the required depth upward to the left, and then move the center of oscillation of the end mill 34 to the trajectory C'.
At the same time, the rolling roll 11 is rotated by the rotation amount R3, and the caliber shoulder (left) 9a is moved upward to the left in the machining range θ3 from the machining mode change point C to the machining mode change point d. Machining shallow parts.

Then, while moving the swing center of the end mill 34 from P4 to point 21, the rolling roll II is moved to the threaded portion p33 (B
) and repeat the above procedure.

(3) Machining procedure for corrugated (V-shaped) part 33 (C) In the case of V-shaped part groove 33 (C) as shown in Fig. 15 (a), 2
Perform machining.

(a) First processing step Almost the same as the steps in FIGS. 11(a) to 11(g),
The pivoting center of the end mill 34 is moved from point P to point 27, and from point 22 to the diameter reduction position RP' along a trajectory, and at the same time, the rolling roll II is rotated by the rotation amount R1 to reach the machining start point. Move from a to the machining mode change point in the machining range θ, machine a shallow upward-left part on the caliber shoulder (right) 9a, then move the end mill 34 to the diameter reduction position P'
At the same time, the rolling roll ■1 is rotated at the rotation Wk Rz to rotate the rolling roll ■1 at the rotation Wk Rz, and the oscillating machining range θ2 from the machining mode change point to the machining mode change point C is
Machining a part of the required depth upward to the left on the bottom part 9b of the caliber, and then moving the swing center of the end mill 34 to point 23 on the trajectory ρ', and at the same time rotating the rolling roll II at the rotation amount R3. Then, move the caliber shoulder (left) 9a in the moving machining range θ3 from the machining mode change point C to the machining end point d.
Machining the shallow part facing upward to the left.

Next, in the reverse procedure to the above, the swing center of the end mill 34 is moved from the 23rd point to the diameter reduction position P' on the trajectory Q°, and at the same time, the rolling roll 11 is rotated by the rotation amount R1°, and the machining is completed. Move from point d to machining mode change point C'. Machining a shallow upward-sloping surface on the caliber shoulder (left) 9a in the machining range θ, and then move the end mill 34 to the diameter reduction position P.
The rolling roll 11 is rotated at a rotation speed of 1.' at the same time as the oscillating fulcrum at the fulcrum point C', and the oscillating machining range θ from the machining mode change point C' to the machining mode change point b° is
.

Machining a nodal groove of the required depth upward to the right on the bottom part 9b of the caliber with
At the same time, the rolling roll II is rotated f1.
3', a shallow upward-sloping surface to the right is machined on the caliber shoulder (right) 9a within the moving machining range θ1 from the machining mode change point b' to the machining start point a.

Repeat the above steps to apply V to the entire Caliber 9.
Machining the first knot groove of the shape.

(b) Second machining process After the first machining process is completed, the swing center of the end mill 34 is moved to the diameter reduction position P', and the swing of the end mill 34 is
Set within the oscillating machining range θ, and within the oscillating machining range θ,
Set machining mode change points e, f, and g.

Then, the center of the cutting edge of the end mill 34 is set, for example, at the machining mode change point e in the first nodal groove, and the end mill 34 is swung counterclockwise about the diameter reduction position P' as a fulcrum, and at the same time the rolling The roll 11 is rotated by the rotation amount R4, and is rapidly traversed in the first knot groove in the swing machining range θ4 from the machining mode change point e to the machining mode change point f, and then the machining mode is changed from the center of the cutting edge of the end mill 34 to the machining mode change point f. When the point f is reached, as shown in FIG. 15(c), the machining mode change points r, r
The end mill 34
At the same time, the rolling roll 11 is rotated by a rotation amount R5, and at the machining mode change point g, the end mill 34 is swung from the diameter reducing position P'. While swinging clockwise as a dynamic fulcrum, the rolling roll If is rotated by a rotation amount Rs'.

Next, the end mill 34 is swung clockwise about the diameter reduction position P' as a fulcrum, and at the same time the rolling roll 11 is rotated at the rotation IR,', from the machining mode change point f° to the machining mode change point. Rapidly traverse the inside of the first knot groove in the oscillating machining range θ4 up to e°.

By repeating the above steps, the V
A second arc-shaped groove is machined inside the first groove of the mold.

When machining the second knot groove, as shown in Figure 15(b), a triangular uncut portion (see hatching) is left between the folded portion of the first knot groove and the arc portion of the second knot groove. occurs, so the center of the cutting edge of the end mill 34 is the machining mode change point g
When reaching , the rotation of the rolling roll 11 is stopped, and the end mill 34 is further swung counterclockwise around the diameter reduction position P° as a fulcrum to the processing mode change point g', and the uncut portion is removed. have them do it.

Thereafter, the end mill 34 is swung clockwise around the diameter reduction position P° as a fulcrum, and the above-described machining process is continued.

(4) Machining procedure for corrugated (U-shaped) box cargo 33 (D) In the case of a U-shaped groove 33 (D) as shown in FIG. 16, machining is performed twice.

(a) First processing step Almost the same as the steps in FIGS. 11(a) to 11(g),
The pivoting center of the end mill 34 is moved to the diameter reduction position P°, and a processing mode change point g is set within the moving processing range θ1°03 of the end mill 34.

Then, the center of the cutting edge of the end mill 34 is set, for example, at the machining mode change point, and the end mill 34 is moved to the diameter reduction position P.
At the same time, the rolling roll 11 is rotated counterclockwise using ° as a swing fulcrum, and the rolling roll 11 is rotated by a rotation amount R6, and the caliber bottom 9b is rotated in the swing processing range θ from the processing mode change point to the processing mode change point C. When a box of required depth is machined upward to the left, and then the center of the cutting edge of the end mill 34 reaches the machining mode change point f, the mode change points c and c', as in the case of FIG. 15(c). If the center of oscillation of the end mill 34 is moved to just before the 21st point on the trajectory Q', so that a shallow arc-shaped box is machined on the caliber shoulder (left) 9a in the oscillation machining range θ between At the same time, rolling roll II is rotated 11R.
Rotate at 7, and at machining mode change point g, turn the end mill 34.
The center of oscillation is moved along the trajectory Q' to the diameter reduction position P°, and at the same time, the rolling roll 11 is rotated by a rotation amount R7゛,
Machining a shallow arc-shaped box on the caliber shoulder (left) 9a,
Furthermore, the end mill 34 is swung clockwise about the diameter reduction position P° as a fulcrum, and at the same time, the rolling roll 11 is rotated by a rotation amount R6'' to reach the machining mode change point C.

oscillating machining range θ from to machining mode change point b''.

Process a box load of the required depth upward to the right on the bottom part 9b of the caliber.

Repeat the steps above to apply U to the entire Caliber 9.
Machining the first knot groove of the shape.

(b) Second machining process After the first machining process, the center of swing of the end mill 34 is
At the same time, the rolling roll 11 is rotated at a rotation speed of 11Ra to move from the point Pt to the diameter reduction position P° on the trajectory a, and the moving machining range θ is obtained from the machining start point a to the machining mode change point.
1, a shallow groove upward to the left is machined on the caliber shoulder (right) 9a, and then the end mill 34 is swung counterclockwise about the diameter reduction position P' as a fulcrum, and at the same time, the rolling roll 1
1 at rotation ff1Rs, fast-forward in the first joint groove in the oscillating machining range θ6 from the machining mode change point to the machining mode change point C, and then move from the center of the cutting edge of the end mill 34 to the machining mode change point C. When the end mill 34 reaches point 23, the center of swing of the end mill 34 is moved from the diameter reduction position P' to point 23 along the trajectory a', and at the same time, the rolling roll 11 is rotated by the rotation amount RI. Rotate with and move from machining mode change point C to machining end point d. Machining shallow grooves rising to the left on caliber shoulder (left) 9a in machining range θ, then change machining mode from machining mode change point d. Until the change point d', the end mill 34 is stopped from swinging, and the rolling roll 11 is rotated by the rotation amount R, , to form a shallow groove in the circumferential direction on the caliber shoulder (left) 9a.

When the center of the cutting edge of the end mill 34 reaches the machining mode change point d°, the swing center of the end mill 34 is moved along the trajectory Q
At the same time, the rolling roll 11 is rotated by the rotation amount RIo', and the caliber shoulder is moved from the machining mode change point d' to the machining mode change point C° in the machining range θ3. (Left) A shallow groove rising to the right is machined in 9a, and then the end mill 34 is swung clockwise about the diameter reduction position P' as a fulcrum, and at the same time, the rolling roll 11 is rotated at a rotation ffi R of 9°. Then, the first nodal groove is rapidly traversed in the oscillating machining range θ6 from the machining mode change point C'' to the machining mode change point b''.

By machining this second knot groove, an arc-shaped uncut portion is created outside the arc portion of the first knot groove in the first machining process.
The uncut portion will be removed.

[Brief explanation of the drawing]

FIG. 1 is an overall plan view of a box processing device according to the present invention, and FIG.
The figure is a front view of figure 1, figure 3 is a left side view of figure 2, and figure 4 is a left side view of figure 2.
The figure is a rear view of Fig. 2, Fig. 5 is a plan view of the main part of Fig. 2, Fig. 6 (a) and Fig. 6 (b) are front views showing examples of grooves,
Fig. 7 is a plan sectional view of the rocking table, Fig. 8 is a front sectional view of Fig. 7, Fig. 9 is a front sectional view of the head, and Fig. 10 shows the relationship between the swinging of the end mill and the locus of movement. Plan views, FIGS. 11(a) to 1t(g) are plan views showing exploded swings of the end mill and movement of the center of swing, FIGS. 12(a) to 12(g).
Figure (c) is a side view showing how to set the extension amount of the end mill.
13 is a front view of the parallel groove, FIG. 14 is a front view of the threaded groove, FIG. 15(a) is a front view of the V-shaped groove,
Figure (b) is a front view showing how to remove the uncut portion;
FIG. 15(C) is a front view showing the procedure for processing the circular arc portion;
FIG. 16 is a front view of the U-shaped groove. 9... Caliber, 9a... Shoulder, 9b...
・Bottom, 1! ...rolling roll, 12...
Base, 21... Parallel movement table, 26... Right angle movement table, 29... Impression table, 33 (A, B, C,
D)...muscle groove, 34...end mill, 66...control device, P.
...Caliber center, Po...diameter reduction position 7f 4 B5

Claims (2)

[Claims] (1) A method of machining knot grooves in the caliber of a rolling roll using an end mill, the swing center being at a reduced diameter position in front of the center of the caliber,
A process of machining a knot groove on the bottom of the caliber while swinging the end mill within an angle range where the rear part does not contact the shoulder of the caliber, and a process of tilting the end mill to an angle where the rear part does not contact the shoulder of the caliber and adjusting the center of swing of the end mill. A process of forming knot grooves in the shoulder of the caliber that are shallower than the grooves at the bottom of the caliber while moving the roll along a predetermined trajectory with respect to the diameter reduction position. Method. (2) A method of machining knot grooves in the caliber of a rolling roll using an end mill, the swing center being at a reduced diameter position in front of the center of the caliber,
There is a process of machining a knot groove on the bottom of the caliber without rocking the end mill within an angle range where the rear part does not contact the shoulder of the caliber, and a process of rocking the end mill at an angle where the rear part does not contact the shoulder of the caliber, and the process of rocking the end mill. A step of machining a knot groove shallower than the knot groove of the bottom of the caliber on the shoulder of the caliber while moving the dynamic center along a predetermined trajectory relative to the diameter reduction position, and a step of cutting the rolling roll in synchronization with each of the above steps. A method for machining knots and grooves in a rolling roll, the method comprising: rotating the roll.