JPH0413421A - Corrugate cutter head - Google Patents

Abstract

PURPOSE:To allow to secure the parallelism of two upper and lower shafts by removing the clearance of the bearing itself, bearing two upper and lower shafts together as the fixed beam and increasing the rigidity of bearing. CONSTITUTION:Because the double row type back-to-back duplex bearing are used to the bearings 14A, 15A, 21A, 22A, and applied with the pre-load with the bearing lock nuts 32, 33, 36, 37, so the clearance of the bearing itself is removed. And because the outer jackets of the bearings 14A, 15A, 21A, 22A are fixed directly or indirectly to the head body 12 with the bearing holders 16A, 17A, 34, 35, so the two upper and lower shafts 11, 18 are borne as the fixed beam. Further, because the bearing casings 23A, 24A of the spindle 18 of the upper side are pressed to the head body 12 with the set screws 40, 41, and also bound to the head body 12 with the bolts 38. 39, the clearance between the bearing casings 23A, 24A and the head body 12 are removed. Therefore, the bearing rigidity is improved and the parallelism of two upper and lower shafts 11, 12 are kept well.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a corrugate cutter head for forming corrugate fins.

<Prior Art> Fig. 3 shows a schematic configuration diagram of a corrugate fin forming apparatus.

As shown in the figure, a film-like fin material 2 (Cu or Al; plate thickness 0, 05-0,
2 m) is bitten between a pair of upper and lower gear-shaped full-gate cutters 4 and 5 in the corrugate cutter head 3, and is bent into a wave shape.Then, the fin pitch is determined by the pitch determining device 6, and a predetermined cut is made by cutting N7. The corrugated fin 8 is cut to length. In the figure, reference numerals 9 and 10 indicate upper and lower projecting plates that control the bending height of the fin material 2.

The full gate cutter head 3 is conventionally constructed as shown in FIG.

That is, the support shaft 11 that supports the lower full-gate cutter 5 has bearings 1 mounted in mounting holes 13a and 13b formed in the left and right side walls of the head body 12, which is made of a housing, near both ends of the support shaft 11.
4 and 15 and flanges 16 and 17 screwed onto the head body 12. As the bearings 14 and 15, single-row deep groove bearings such as JISB 1511-6207 are used, for example.

On the other hand, the upper support shaft 18 that supports the corrugated cutter 4 is
At both ends thereof, it is pivotally supported in notches 19 and 20 formed in the left and right side walls of the head body 12 via bearings 21 and 22 and bearing casings 23 and 24 that accommodate the bearings 21 and 22, respectively. As the bearings 21 and 22, single-row deep groove bearings are used like the bearings 14 and 15 described above. Further, the bearing casings 23 and 24 are fitted into the head body 12 by sliding guide grooves 25 and 26 provided vertically on both the front and rear end surfaces of the notches 19 and 20 from above. Can be assembled.

In addition, 27.28 in the figure is the bearing casing 23.24.
The springs 29 and 30 are installed to prevent the upper and lower full gate cutters 4 and 5 from interfering with each other during assembly. Said spring 2
7.28 It is a push-down screw that pushes down against force.

<Problem to be Solved by the Invention> However, in the above-mentioned corrugate cutter head, the support shafts 11, 18 of the upper and lower corrugate cutters 4, 5 are supported by the support beams by the single row deep groove bearings 14, 15, 21, 22. Since the bearing is mounted as a bearing, the rigidity of the bearing is low due to the presence of play in the bearing itself.
Since the bearing rigidity further decreases due to the play with 2,
Due to the load moment, the upper and lower support shafts 11 and 18 were bent as shown in Fig. 5, and the parallelism of the upper and lower two axes could not be ensured.

Therefore, as shown in Fig. 6, the upper and lower corrugated cutters 4 and 5 may partially interfere (see the part A in the figure), and the surface pressure at the interference part becomes abnormally high, causing damage to the cutter tooth surface. There were problems in that the life of the cutter was significantly shortened, the height of the fins became higher near the interference part, and the pitch length became smaller accordingly, resulting in a decrease in the shape accuracy of the corrugated fins.

Therefore, an object of the present invention is to effectively increase the bearing rigidity of the upper and lower support shafts to ensure parallelism between these two axes.

Means for Solving the Problems> The structure of the present invention to achieve the above object is to preload the spindles that support the upper and lower corrugate cutters, respectively, to double-row back-to-back bearings, and to use bearing holders. A bearing casing is interposed between the upper support shaft and the head body, and the bearing holder is screwed onto the head body, and the bearing casing is screwed onto the head body. do.

According to the above configuration, the play in the bearing itself is eliminated, and both the upper and lower axes are supported by the fixed beam, and the parallelism of the upper and lower axes is ensured by improving bearing rigidity.

Embodiment> An embodiment of the present invention will be described below based on the accompanying drawings. FIG. 1 is an exploded perspective view showing one embodiment of the present invention, and FIG.
The figure is an assembled cross-sectional view. In addition, Fig. 1 and Fig. 2 1
ζ, the same members as in FIG. 4 are given the same reference numerals and detailed explanations will be omitted.

As shown in FIGS. 1 and 2, the lower corrugate cutter 5
For example, one support shaft that supports JISBI! The head body 12 is supported via double row back-to-back type bearings 14A, 15A such as Ml-7207ADB and bearing retainers 16A, 17A. And the bearing 14A.

15A is preloaded by bearing lock nuts 32 and 33. In addition, the above bearing presser 1
6A and 17A are screwed onto the head body 12, and the bearing 1 is screwed onto the head body 12.
4A and 15A outer cylinders are fixed to the head body.

On the other hand, the support shaft 18 that supports the upper corrugated cutter 4 has the bearings 14A at both ends thereof.

Double-row back-to-back bearings 21A, 2 similar to 15A
2A, bearing casings 23A, 24A, and bearing retainers 34, 35 to be supported by the head body 12. The bearings 21A and 22A are bridged by bearing lock nuts 36 and 37. Further, the bearing holders 34 and 35 are screwed onto the bearing casings 23A and 24A, and the bearing holders 34 and 35 are screwed onto the bearing casings 23A and 24A.
The outer cylinder is fixed to the bearing casings 23A and 24A.

Furthermore, in this embodiment, the bearing casings 23A, 2
4A, the main body parts 23a, 24a are slidably fitted into the notches 19.20 of the head main body 12, and the flange parts 23b, 24b attached to the inner edges of both the front and rear end surfaces of the main body parts 23a, 24a are attached to the head main body 12. It is connected to the inner surfaces of the left and right side walls of 12 with a plurality of bolts 38 and 39. Further, the bearing casings 23A, 24A are pressed and fixed to the front wall surface of the notch 19.20 by a plurality of push screws 40.41 screwed into the rear end surfaces of the left and right side walls of the head body 12. It has become.

In this way, in this embodiment, the bearing 14A.

Double-row back-to-back bearings are used for 15A, 21A, and 22A, and bearing lock nuts 32 and 3 are used.
Since I applied preload at 3, 36, and 37,
Play in the bearing itself is eliminated.

Further, the bearings 14A, 15A, and 21A.

Hold the outer cylinder of 22A with bearing holders 16A and 17A.

Since the head body 12 is fixed directly and indirectly at 34 and 35, the two upper and lower axes 11° 18 are supported as fixed beams.

Furthermore, the bearing casing 23A in the upper support shaft 18
, 24A are pressed against the head body 12 by push screws 40, 41 and are coupled to the head body 12 by bolts 38, 39, so that the bearing casings 23A, 24A
The play between the head body 12 and the head body 12 is eliminated.

As a result, as shown in the table below, the bearing rigidity and other rigidities are much improved compared to the conventional example, and the parallelism of the two upper and lower axes 11 and 18 is therefore ensured well.

Note that the present invention is not limited to the above embodiments, and the push screw 40
．． By omitting the pressing by 41, the bearing casing 23A,
24A to the head body 12 with bolts 38, 39, etc., it goes without saying that various changes can be made without departing from the gist of the present invention.

<Effects of the Invention> As explained above, according to the present invention, the play in the bearing itself is eliminated, and both the upper and lower axes are supported as fixed beams,
Since the parallelism of the two vertical axes can be ensured by improving the bearing rigidity, the shape accuracy of the corrugated fin and the life of the cutter can be significantly improved.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing an embodiment of the present invention, Fig. 2 is an assembled sectional view thereof, Fig. 3 is a schematic configuration diagram of a corrugate fin forming apparatus, and Fig. 4 is an exploded perspective view of a conventional example. FIG. 5 is a sectional view showing the deflection state of the support shaft in the conventional example, and FIG. 6 is a perspective view showing the molded state of the corrugated fin. In addition, in the drawing, 3 is a corrugate cutter head, 4 is an upper corrugate cutter, 5 is a lower corrugate cutter, 11 is a support shaft,
12 is the head body, 14A. 15A is a bearing, 16A and 17A are bearing holders, 21
A and 22A are bearings, 23A and 24A are bearing casings,
32 and 33 are bearing lock nuts), 34 and 35 are bearing pushers, 36 and 37 are bearing lock nuts, and 38 and 394 are bolts.

Claims (1)

[Claims] The spindles that support the upper and lower corrugate cutters are
A preload is applied to the double-row back-to-back type bearing, and it is supported against the head body using a bearing holder, and a bearing casing onto which the bearing holder is screwed is interposed between the upper support shaft and the head body. ,
A corrugated cutter head characterized in that this bearing casing is screwed onto the head body.