JP4205790B2 - Inserting rods into the finger chuck - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for inserting bars for full Ingachakku to insert the gripped the bars in the clamping device the finger chuck, for an insertion method of the bar especially for off that apply to the bar feeder Ingachakku .
[0002]
[Prior art]
Conventionally, in the bar feeder, as a method for inserting the bar 2 which is gripped in the clamp device 1 in the finger chuck 3, the insertion process of the bar is known for shows to full Ingachakku in FIG. Insertion method This bar against off Ingachakku of, first, sandwiched to fix the rear end of the bar 2 the pair of nail pieces 1a of the clamping device 1, in the vertical direction 1b. The bar 2 is cantilevered by the clamp device 1 in a state where it protrudes by a length L. Next, the finger chuck 3 provided with the cylindrical portion 3a and the cut portion 3b at the tip is advanced by a length l toward the clamp device 1 in the axial direction of the bar 2. As a result, the bar 2 is inserted into the bar insertion hole 3c with a necessary gripping length while expanding the cylindrical portion 3a of the finger chuck 3.
[0003]
[Problems to be solved by the invention]
However, when the bar 2 is inserted into the finger chuck 3, the finger chuck 3 must be spread out by the bar 2, so that resistance occurs in the bar 2. Due to this resistance, an axial compression load is applied to the bar 2. In the case of the small-diameter bar 2, the bar 2 may be buckled and bent by this compression load. In order to prevent buckling of the bar 2, the entrance of the finger chuck 3 is tapered, or the rear end of the bar 2 is chamfered at an acute angle. Too little effect.
[0004]
The present invention aims at providing a method of inserting the rod member for full Ingachakku that can inserted into without finger chuck buckled the small diameter of the bar.
[0005]
[Means for Solving the Problems]
The present invention will be described below. In addition, in order to make an understanding of this invention easy, the reference number of an accompanying drawing is attached in parenthesis writing, However, This invention is not limited to the form of illustration.
[0006]
The invention of claim 1 provides in the insertion method of the bars, bars (11) gripped the bars in the clamping device (16) to (11) for full Ingachakku to be inserted into the finger chuck (18) A finger chuck (18) rotatably attached to the tip of the feed pipe (12) is prepared, and the finger chuck (18) or the above-mentioned finger chuck (18) is arranged so that the finger chuck (18) approaches the clamp device (16). A first insertion step (S2) of moving at least one of the clamp devices (16) in the axial direction of the bar (11) and inserting the bar (11) into the finger chuck (18); and the clamp device (16) open, said the bar with finger chuck (18) (11) while gripping the said finger chuck (18) said click A finger chuck separation step (S3) for moving at least one of the finger chuck (18) or the clamp device (16) in the axial direction of the bar (11) so as to be separated from the compression device (16); At least one of the finger chuck (18) and the clamp device (16) is attached to the bar so that the finger chuck (18) approaches the clamp device (16) with the clamp device (16) closed. (11) the second insertion step (S4) and method for inserting bars for full Ingachakku you further comprising a that moves in the axial direction to insert the bar (11) to the finger chuck Thus, the above-described problem is solved.
[0007]
According to this invention, the insertion of the bar (11) into the finger chuck (18) is performed in two steps, a first insertion step (S2) and a second insertion step (S4). As a result, the necessary gripping length of the finger chuck (18) is obtained. For this reason, even if the length (L) of the bar (11) protruding from the clamp device (16) is shortened, the bar (11) can be inserted into the finger chuck (18) with a necessary gripping length. Therefore, the slenderness ratio of the bar (11) held by the clamp device (16) can be reduced, and when the bar (11) is inserted into the finger chuck (18), the bar (11) is axially compressed. Even when a load is applied, the rod (11) can be prevented from buckling and bending.
[0008]
A second aspect of the present invention, in the method of inserting the rod member for full Ingachakku according to claim 1, the first insertion step (S2) in the finger chuck (18) relative to the clamping device (16) In the finger chuck separation step (S3), the finger chuck (18) is moved backward with respect to the clamp device (16), and in the second insertion step (S4), the finger chuck (18) is moved to the clamp. Characterized in that it is advanced relative to the device (16).
[0009]
According to this invention, when applied to a bar feeder, it is only necessary to move the finger chuck (18) already provided with a moving mechanism, so it is necessary to prepare a moving mechanism for moving the clamping device (16) separately. The finger chuck (18) can be easily moved back and forth with respect to the clamping device (16).
[0010]
The invention according to claim 3, in the insertion method of the bar with respect to claim 1 or 2, wherein the full Ingachakku, the first insertion step (S2), the finger chuck spacing step (S3) and said second insert The step (S4) is repeated.
[0011]
According to this invention, since the first insertion step (S2), the finger chuck separation step (S3) and the second insertion step (S4) are repeated, the bar (11) from the clamping device (16) The projecting length (L) can be further shortened. For this reason, the slenderness ratio of the bar (11) can be further reduced, and the bar (11) can be further prevented from buckling and bending.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Figure 1 shows a bar feeder for insertion method of the bar for the full Ingachakku of the present invention is applied. This bar supply machine pushes the bar 11 in the axial direction and supplies the bar 11 to the main shaft 14 of the automatic lathe 13 disposed in front. The bar 11 supplied to the automatic lathe 13 is chucked by the collet chuck 19, is rotated, and is cut by a cutting tool provided in front of the collet chuck 19. The bar feeder includes a feed pipe 12 and a guide pipe 15 for guiding the feed pipe 12 therein. The feed pipe 12 is connected to a timing belt 17 that is reciprocated by a stepping motor, for example, and reciprocates in the guide pipe 15. A finger chuck 18 that holds the rear end of the bar 11 is rotatably attached to the front end of the feed pipe 12 via a bearing or the like. The finger chuck 18 grips the bar 11 by its elastic spreading expansion. The bar 11 is fed to the spindle 14 of the automatic lathe 13 with the rear end held by the finger chuck 18. A clamp device 16 is provided in a portion where the guide pipe 15 is partially removed.
[0013]
FIG. 2 shows a state in which the bar 11 is inserted into the finger chuck 18. When the bar material 11 before processing is introduced one by one from a shelf (not shown) for storing the bar material 11 in the guide pipe 15, the bar material 11 is moved by the clamp device 16 having a pair of claw pieces 16a and 16b. Temporarily sandwich it up and down. Thereby, the bar 11 and the finger chuck 18 are centered. Then, the feed pipe 12 is advanced, and the bar 11 is inserted into the finger chuck 18. When the finger chuck 18 grips the bar 11, the bar 11 is released from the restraint by the clamp device 16 and sent to the automatic lathe 13.
[0014]
FIG. 3 shows a method for inserting a bar into the finger chuck of the present invention. First, the bar 11 is grasped by making the length L of the rear end of the bar 11 coming out from the end faces of the claw pieces 16a and 16b shorter than in the conventional case (S1). Next, the feed pipe 12 is advanced by a length l in the axial direction toward the clamping device 16. The rear end of the bar 11 is inserted into the finger chuck 18 by a length T from the front end of the finger chuck 18 (S2). This length T does not satisfy the required gripping length of the finger chuck 18.
[0015]
Next, the claw pieces 16a and 16b are opened, and the finger chuck 18 is retracted by a length l in a state where the bar 11 is gripped by the finger chuck 18 (S3). Next, with the claw pieces 16a and 16b of the clamp device 16 closed, the finger chuck 18 is again advanced by the length l (S4). Here, the bar 11 is inserted into the finger chuck 18 again for a length l. Eventually, the bar 11 is inserted into the finger chuck 18 for a length of T + 1. Further, when there are three or more steps of inserting the bar 11 into the finger chuck 18, the insertion length of the bar 11 into the finger chuck is T + l + 1 + l +.
[0016]
As described above, the insertion of the bar 11 into the finger chuck 18 is performed in a plurality of steps, and as a result, a necessary gripping length of the finger chuck 18 is obtained.
[0017]
According to the method of inserting the bar material into the finger chuck of the present invention , since the insertion of the bar material 11 into the finger chuck 18 is performed in a plurality of insertion steps, the bar material protruding from the claw pieces 16a and 16b of the clamp device 16 is performed. Even if the length L of 11 is shortened, the necessary gripping length of the finger chuck 18 can be obtained. For this reason, the length L of the bar 11 protruding from the claw pieces 16 a and 16 b can be shortened, the slenderness ratio of the bar 11 can be reduced, and the bar 11 is inserted when the bar 11 is inserted into the finger chuck 18. Even if an axial compressive load is applied, the bar 11 can be prevented from buckling and bending.
[0018]
In the present embodiment, the finger chuck 18 is moved without moving the clamp device 16, but the same effect can be obtained by moving the clamp device 16 without moving the finger chuck 18.
[0019]
【The invention's effect】
As described above, according to the method of inserting the rod member for full Ingachakku of the present invention, the insertion of the bar into the finger chuck is performed in a plurality of insertion steps, resulting in the required grasping finger chuck Since the length is obtained, the length of the bar protruding from the clamping device can be shortened. For this reason, the slenderness ratio of the bar can be reduced, and it is possible to prevent the bar from buckling and bending even when an axial compression load is applied to the bar when inserted into the finger chuck.
[Brief description of the drawings]
1 is a perspective view showing a bar feeder for insertion method of the bar is applied against the full Ingachakku of the present invention.
FIG. 2 is a perspective view showing the bar feeder in a state where the bar is inserted into the finger chuck.
Process diagram showing a method for inserting bars for full Ingachakku of the present invention; FIG.
4 is a cross-sectional view illustrating a method for inserting bars for conventional full Ingachakku.

Claims (3)

In the insertion process of the bar a grabbed the bar to the clamping device for the full Ingachakku to be inserted into the finger chuck,
Prepare a finger chuck that is rotatably attached to the tip of the feed pipe that supplies the bar material.
A first insertion step of moving at least one of the finger chuck or the clamp device in the axial direction of the bar so that the finger chuck approaches the clamp device, and inserting the bar into the finger chuck; ,
In a state where the clamp device is opened and the bar material is gripped by the finger chuck, at least one of the finger chuck or the clamp device is moved in the axial direction of the bar material so that the finger chuck is separated from the clamp device. A finger chuck separating step to move;
With the clamp device closed, at least one of the finger chuck or the clamp device is moved in the axial direction of the bar so that the finger chuck approaches the clamp device, and the bar is moved to the finger chuck. second insertion step and the insertion method of the bar against off Ingachakku further comprising a to be inserted into. In the first insertion step, the finger chuck is advanced with respect to the clamp device, in the finger chuck separation step, the finger chuck is retracted with respect to the clamp device, and in the second insertion step, the finger chuck is moved. method for inserting bars for according to claim 1 full Ingachakku, characterized in that advancing to the clamping device. The first insertion step, the finger chuck spaced steps and insertion method of the bar with respect to claim 1 or 2, wherein the full Ingachakku and repeating the second insertion process.

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