JPS6149066B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous chip processing device that performs shredding processing while drawing in continuous chips generated during cutting with a cutting machine tool.

Generally, when processing chips in lathe machining or the like, a method is adopted in which chips are divided into appropriate lengths during the generation process by selecting and using the groove width of a chip breaker depending on the cutting conditions. This method is economical, but the type of workpiece material (e.g. stainless steel)
Since there are restrictions on cutting conditions (for example, finish cutting), etc., it is unavoidable that chips that are elongated without being broken up, that is, continuous chips, are generated. Therefore, in order to process such continuous chips, for example, a winding processing device 02 shown in FIG.
The processing device 04 by cutting shown in FIG. 2, the processing device 08 by fusing shown in FIG.
The one described in No. 29138 (Utility Model Application Publication No. 52-121785) was used. The winding processing device 02 shown in FIG. 1 winds chips 01 around a rotating drum 03, but it is difficult to wind the tip of the chips 01, which are first cut from the cutting edge, around the drum 03. Moreover, when the continuous chips 01 are cut in the middle, it is even more difficult to wrap the chips 01 around the drum 03 again. Furthermore, the chips 01 wound up on the drum 03 had to be reprocessed, which was time-consuming and inconvenient. Next, the processing device 04 by cutting removes 0 chips as shown in FIG.
The main part consists of a cylindrical chip guide 07 that guides the chips 1 and several cutting blades 06 rotated by a motor. The inlet of the chip guide 07 is arranged in the cutting part so as to take in the chips 01, and the chip guide 0
Several cutting blades 06 that rotate along the opening end surface are provided at the outlet of the hole 7, and the continuous chips 01 that pass through the chip guide 07 and come out from the opening end surface are separated by the rotating cutting blades 06 and the exit end surface. Cut at regular intervals.
However, in this case, if a gap is created between the cutting edge 06 and the outlet end surface of the chip guide 07, it becomes difficult to cut the chips 01, and it is difficult to maintain the gap between the cutting edge 06 and the outlet end surface of the chip guide 07. It was also extremely difficult. Furthermore, the processing device 08 by fusing shown in FIG. 3 is equipped with a chip guide 07 and a fusing part 09 similar to the cutting machine described above, and the fusing part is heated by using electricity, plasma, laser, etc. 0 chips
1. FIG. 3 schematically shows an electrical fusing device. Such a fusing device 08
is a continuous chip 0 that passes through the guide tool 07 and comes out.
However, it requires a large-scale energy generator, etc., and also requires insulation and protection equipment against electricity, heat, light, etc., and has the disadvantage that the entire device becomes large-scale and expensive. Also,
Since neither of the above-mentioned cutting and fusing processing devices has the function of drawing out chips 01,
In the case of soft chips, it was difficult to pass through the inside of the chip guide 07, and there was a possibility that continuous chips 01 would accumulate inside the chip guide 07. Also, Akira Jichigan
The device described in No. 51-29138 utilizes intermittent changes in the tensile force generated on chips due to the intermittent meshing phenomenon between the normal tooth meshing area and the defective tooth area, and uses the tensile force to remove the chips. However, there are the following problems. A pair of gears are supported with a loose mesh, but if the thickness of the chips exceeds the meshing gap, vibrations will occur due to the bending reaction force generated during meshing, and the tool itself and the tip of the tool at the tip of the tool rest (chip points), and the accuracy and surface roughness of the workpiece will deteriorate. The cutting mechanism is based on tensile force using irregular notch teeth, and if the chip thickness is large or the workpiece material is highly tough, the chip may not be able to be cut. The shredding length of the chip is determined by the arrangement pitch of the irregular notch teeth, and as mentioned above, when the chip thickness becomes large or when the chip is made of a highly tough workpiece material, the tensile strength required to shred the chip increases. In order to generate force, it is necessary to prepare gears with different pitches of irregular notch teeth,
Requires replacement. When the rotational peripheral speed of the gear is higher than the chip removal speed, when the chips introduced into the guide hole mesh at the normal tooth meshing region, a tensile force acts on the chips, causing some part of the chips inside the guide hole to engage.
Or, it is torn off at the chip point at the tip of the cutting tool. In particular, if the chip is torn off at the chip point, the machining accuracy of the workpiece will be affected, so the rotational peripheral speed of the gear should not be increased unnecessarily.

Therefore, in order to eliminate such drawbacks, it is an object of the present invention to simplify the device and provide a continuous chip processing device with high cutting ability. To achieve this object, the present invention has a structure in which, in an apparatus for processing chips cut from a cutting edge during cutting, flat milling type cutters having blades in the same helical direction are provided with a predetermined gap and are opposed to each other. By configuring these flat milling type cutters to be driven in opposite directions through a gear mechanism using a motor as a drive source, chips can be drawn between the opposing twisted blades. It is characterized by being shredded.

An embodiment of the apparatus of the present invention will be described in detail below with reference to the drawings.

As shown in FIGS. 4 and 5 (FF-F sectional view in FIG. 4), the continuous chip processing device according to the present invention is a flat milling cutter having twisted blades arranged in parallel and facing each other. Katsuta 21 and Katsuta 26
and a drive mechanism that rotates the cutters 21 and 26 in opposite directions. The cutter 21 and the cutter 26, which are arranged side by side and facing each other, have the same twisted blade direction so as to cut the chips 11 while drawing them between the mutually facing twisted blades,
As shown in FIG. 6, the cutters 21 are arranged to rotate counterclockwise, and the cutters 26 are arranged to rotate clockwise. Katsuta 21,
26, as shown in FIG.
The cutter 26R has a twisted blade in the opposite direction to the cutter 26L so as to draw the chips 11 toward the center and cut them. Also, Katsuta 21
R and 21L are fixed by keys (not shown) on the cutter shaft 20 so that they rotate without slipping on the cutter shaft 20, and the cutters 26R and 26L are similarly attached to the rotation shaft 2.
5 by a key (not shown).

Next, the drive mechanism includes a motor 10 that rotates the cutters 21 and 26 and a pulley 14 fixed to one end of a rotating shaft 15.
A V-belt 9 is stretched between the two. Also,
A gear 16 is fixed to the other end of the rotating shaft 15, and a groove 17 and a sliding plate 18 are provided at the center of the end surface of the gear 16.
The grooved bush 19 connected to the cutter shaft 20 constitutes an Oldham joint. Furthermore, a small gear 24 is provided on the rotating shaft 25 of the cutter 26 and meshes with the gear 16, and the ratio of the number of teeth between the gear 16 and the small gear 24 is set to 2:1. Further, the cutter 21 fixed to the cutter shaft 20 can be slightly moved in the radial direction by adjusting the eccentric bushes 22 and 23, which serve as bearings for the cutter shaft 20. Katsuta 2
1 is tightened to the cutter shaft 20 with a nut 27, and the cutter 26 is tightened to the rotating shaft 25 with a nut 28.

Next, the operation of the continuous chip processing device having the above structure will be explained.

As shown in FIG. 4, the rotation of the motor 10 is transmitted to the pulley 14 via the V-belt 9, and the rotation of the pulley 14 rotates the gear 16 via the rotating shaft 15, as shown in FIG. The rotation of the gear 16 is sequentially transmitted to the cutter shaft 20 via the groove 17, sliding plate 18, and grooved bush 19 that constitute the Oldham joint, and the cutter 21 is rotated in the same direction as the pulley 14. The small gear 24 meshed with the gear 16 is the gear 16
The rotation is changed to the opposite direction and transmitted to the cutter 26 via the rotating shaft 25. On the other hand, the cutter 21 and the cutter 26 are each made up of two cutters, each with a combination of two cutters whose twisted blades have different twisting directions, and since the twisting directions of the twisted blades of the cutter 21 and the cutter 26 are the same, the cutter 21 and the cutter 26 are 26 are arranged side by side facing each other and rotated in opposite directions to feed the chips 11, the cutters 21 and 26 pull the chips 11 in their respective rotational directions, and the cutters 21 pull the chips 11.
is pressed against the cutter 26, and the cutter 26 presses the chips 11 against the cutter 21, so that the chips 11 are sandwiched between each other and cut.

In this case, the ratio of the number of teeth between the gear 16 and the small gear 24 is set to 2:1, so the cutter 26 rotates at twice the speed of the cutter 21. Furthermore, if the moving speed in the axial direction of the twisted blades of the cutters 21R and 21L is V, then as shown in FIG.
Move away from L. On the other hand, Katsuta 26
Since the twisted blades of R and cutter 26L move toward the mating surface L-L at a moving speed of 2V, chips 11
are gathered together on the mating surface L-L of the cutters by the twisted blades of the cutters 26R and 26L, which move at a high speed. Therefore, the cutters 21 and 26 reliably cut without missing any chips 11.

Next, the length of chips cut by the apparatus of the present invention will be explained with reference to FIGS. 6 and 7. 6th
The figure is a perspective view of the cutter portion of the device of the present invention, and FIG. 7 is an enlarged view of the twisting blades of the cutter 21 and the cutter 26. The ratio of the number of teeth between the gear 16 and the small gear 24 is 2:
1, the cutter 26 rotates at a rotational speed of 2N, where the rotational speed of the cutter 21 is N. If the moving speed in the axial direction of the twisted blades of the cutter 21R and the cutter 21L at that time is V, then the cutter 26R and the cutter 26
The L twisted blade moves toward the mating surface at a speed of 2V. Here, the length of the chips to be shredded is L, the diameter of the cutter 21 and the cutter 26 is D, and the cutter 21
If the helix angle of the twisted blades R, 21L, 26R, and 26L is α, and the cutting edge condition of the twisted blade is g, then the pitch P of the twisted blade is P=πDtanα/g, and the axial direction of the twisted blade of the cutter 21 is The moving speed V is V=π
It becomes DNtanα. Also, Katsuta 21 and Katsuta 26
Because they rotate in opposite directions, the relative movement speed of the twisted blades in the axial direction is 3V, and the cutter 21 and cutter 2
The period T in which the twisted blades of No. 6 contact is T=P/3V=1/3
gN. Also, the rotational speed V of the cutter 21 is V=π
Becomes a DN. Here, when the rotational speed V is made to match the flow rate of continuous chips, the length L of the chips to be shredded becomes L=V×T=πD/3g. Furthermore, when the rotational speed V is higher than the flow rate of continuous chips, the chips are cut even shorter.

Next, an automatic processing system using the continuous chip processing device according to the present invention will be explained.

As shown in FIG. 4, a guide tube 7 is provided to send the chips 11 generated from the cutting edge during cutting to the processing device of the present invention, and the inlet of the guide tube 7 is provided with a guide tube 7 for sucking the chips 11 generated at the cutting part. A negative pressure suction device 4 is connected to the suction device 4 to feed the suction into the induction tube 7, and the outlet of the induction tube 7 is opened toward the cutting blade of the processing apparatus of the present invention. Furthermore, if the chip conveyor 13 is placed below the processing apparatus of the present invention,
The chips 11 fed into the cutters 21 and 26 through the guide tube 7 are continuously cut into pieces and naturally fall onto the chip conveyor 13.
The chips are transported outside the workshop by the machine, and the chips are automatically disposed of.

As explained above, the continuous chip processing device of the present invention has flat milling type cutters having twisted blades on the outer periphery arranged side by side facing each other, and by rotating them in opposite directions, the cutting blades are Since it draws in long and narrow chips, it can cut continuously, and there is no risk of chips clogging inside the guide tube. In addition, since the twisted blade of the cutter gathers the chips in the center of the cutter, the chips can be shredded reliably, and furthermore, the chips can be shredded into appropriate lengths according to changes in the rotational speed of the cutter. Furthermore, if used in combination with other devices, such as a suction device, a guide tube, a conveyor, etc., it is possible to automatically process continuous chips.

[Brief explanation of the drawing]

Figures 1 to 3 show conventional equipment; Figure 1 is a schematic diagram of a processing device by winding, Figure 2 is a schematic diagram of a processing device by cutting, and Figure 3 is a schematic diagram of a processing device by cutting. FIG. 2 is a schematic diagram of the device. Figures 4 to 7
The figure shows the device of the present invention, and FIG. 4 is an overview diagram showing the state of automated operation in combination with other devices,
FIG. 5 is a sectional view taken along line FF in FIG. 4, FIG. 6 is a perspective view of the cutter portion, and FIG. 7 is an enlarged view of the twisted blade of the cutter. In the drawing, 4 is a suction device, 5 is a compressed air supply tube, 6 is a suction nozzle, 7 is an induction tube, 10 is a motor, 11 is a continuous chip, 13 is a chip conveyor, 14 is a pulley, 15 is a rotating shaft, 16 17 is a gear, 17 is a groove, 18 is a sliding plate, 19 is a grooved bush, 20 is a cutter shaft, 21 and 26 are a cutter composed of two twisted blade flat milling type cutters, 21
R, 21L, 26R, 26L are twisted blade flat milling type cutters, 24 is a small gear, 25 is a rotating shaft, V
is the moving speed of the twisted blade in the axial direction, and P is the pitch of the twisted blade.

Claims (1)

[Claims] 1. In a device for treating chips cut from the tip of a cutting edge during cutting, flat milling cutters having blades in the same helical direction are arranged in parallel with a predetermined gap and facing each other, and these flat milling cutters are By configuring the cutters to be driven to rotate in opposite directions through a gear mechanism or the like using a motor or the like as a drive source, the chips are drawn between opposing twisted blades and shredded. processing equipment.