JPH08290304A - Guide pipe fixing structure for bar feeder - Google Patents

Abstract

PURPOSE: To provide fixing structure that can change a bar-supporting guide pipe rapidly according to the diameter of the bar in a device for feeding the bar through a hollow hole provided at the main spindle of a lathe. CONSTITUTION: Supporting collars 8, 18 provided at guide pipes 7, 17 are fixed to bearing seats 1, 11 provided at frames 2, 12. The lower bearing seat 1 and the lower supporting collar 8 are supported by the mutual fitting of circular arc faces, and a pin 3 protrusively provided at the lower bearing seat 1 and a fit-in hole provided at the corresponding part of the lower supporting collar 8 are fitted to each other to perform axial positioning. In the upper bearing seat 11, clamping members 15 protruded inside and sideways are provided at both ends of the circular arc shaped bearing surface 14, and at least one of these clamping members 15 is formed to be fastened by a screw 16 or to be spaced. Step parts 19 to be engaged with the clamping members 15 are formed at both ends of the circular arc shaped periphery of the supporting collar 18. The upper guide pipe 17 is fixed to the bearing seat 11 by fitting the circular arc faces of the collar 18 and upper bearing seat 11 to each other and the step parts 19 by the clamping members 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bar material supplying device used for machining while supplying an elongated bar material to a machining area through a hollow hole provided in a main shaft of a lathe, and a guide tube for supporting the bar material. The present invention relates to a structure for fixing the device to the device frame.

[0002]

2. Description of the Related Art FIG. 3 schematically shows a state in which a bar 31 is processed by a lathe using a bar feeder. The bar material 31, which is a raw material, is rotatably held by the guide tubes 7 and 17 of the bar material feeding device, and penetrates through the hollow hole 32 of the main shaft to project the tip into the processing area 33 of the lathe. Bar 3
No. 1 is gripped by the chuck 34, and the blade 36 processes the tip portion 37 of the bar material by the rotation of the main shaft 35. When the machining is completed, the machined work is cut off from the tip of the bar with a cutting tool, the chuck 34 is opened, and the pusher 38 moves forward (moves to the right in the figure) to the length required for machining the next work. Only send out the bar. And chuck 34
Grips the tip of the bar again and processes the next work.

The rod 31 must be supported by the guide tubes 7 and 17 so as to be rotatable and axially movable. Normally, oil is supplied to the guide tubes 7 and 17, and
Since a fluid cushion is formed between the bar material 7 and the bar material 31, there is no problem even if there is some play between the guide tubes 7, 17 and the bar material 31, but the diameter of the bar material to be processed is When changing, the guide tubes 7 and 17 also need to be replaced. Further, since the loading of the rod into the guide tubes 7 and 17 is performed from the side of the guide tubes 7 and 17, the guide tubes 7 and 17 are divided into upper and lower halves, and the upper guide tube 17 is lifted and opened. ,
The rod is loaded into the guide tubes 7 and 17.

A pusher 38 for axially feeding the bar material
Is a slit 24 formed between the upper guide tube 17 and the lower guide tube 7 by engaging the drive plate 25 connected to the chain 26 arranged along the guide tubes 7 and 17 with the rear end of the pusher 38.
It is driven by moving the drive plate 25 along (see FIG. 5). At the tip of the pusher 38, a holder that fits with the rear end of the rod 31 is mounted by a bearing (not shown) so as to be freely rotatable.

In order to eliminate the waste of the bar material, the pusher 38
Must be provided with a length commensurate with the length of the main shaft 35.
Since the main shaft 35 needs to be supported by bearings arranged at a certain distance, a pulley for transmitting a rotational force to the main shaft, a cylinder for opening and closing the chuck 34, and the like are arranged. Become. Therefore pusher 38
However, in order to avoid the lengthening of the bar feeding device due to this, as shown in FIG. 4, auxiliary guide tubes 41 and 42 are provided behind the guide tubes 7 and 17, and the auxiliary guide tubes 41 and 42 are provided. The pusher 38 is structured to be lifted together with the upper auxiliary guide tube 42 when the pusher 38 and the driving plate 25 for driving the pusher 38 are separated.

After dropping the rod 31 into the lower guide pipe 7 and the lower auxiliary guide pipe 41 from the side of the guide pipe,
The drive plate 25 is moved forward and the rear end of the rod is directly pushed by the drive plate 25 to insert the tip end of the rod into the main shaft 35, and then the drive plate 25 is retracted to guide the guide pipe 17 and the auxiliary guide pipe. 42 is lowered. By the forward movement of the drive plate 25 described above, the rod 3
Since the rear end of 1 is pushed toward the lathe by the length of the main shaft 35, the pusher 38 held by the upper auxiliary guide tube is
The rod 31 descends to a position behind the rear end of the rod 31, and the descending operation engages the U-shaped recess 39 provided in the pusher 38 with the drive plate 25.

The pusher 25 in the retracted position has the lower half portions 43, 43 integrated in front of and behind the upper auxiliary guide tube 42.
And is moved upward together with the upper auxiliary guide tube 42.
In addition, a section (section A in the figure) in which the lower auxiliary guide tube 41 does not exist is provided immediately before the tip of the pusher when it is located at the retreat end, and it is a residual material that cannot be processed. Is held by the holder at the tip of the pusher 38 when the pusher 38 is retracted, is pulled back, and is discharged from this opening portion.

As described above, the guide tubes 7 and 17 need to be replaced according to the diameter of the rod 31 to be supplied, but the arc receiving surface on the frame side that supports the guide tube must be constant. Therefore, the guide tubes 7 and 17 are provided with wide support collars 8 and 18 at a predetermined interval, and the outer circumferences of the support collars have a constant diameter for all the guide tubes, and also to the frames 2 and 12 (lower frame and upper frame). Providing receiving seats 1 and 11 at a predetermined interval, forming an arc receiving surface on the receiving seats 1 and 11 that matches the outer circumference of the guide flanges 8 and 18 of the guide tube, and supporting each supporting flange with the arc receiving surfaces. Thus, the lower guide tube 7 and the upper guide tube 17 are positioned and held.

[0009]

FIG. 5 shows a guide tube collar 8,
1 shows a conventional fixing structure between 18 and the seats 1 and 11 of the frame. In the conventional structure, the collars 8 and 18 and the seats 1 and 1
1 was fixed with bolts 44 and 45. Therefore, when exchanging the guide tubes 7 and 17, the bolts 44 and 45 need to be attached and detached, and a certain number of support flanges and receiving seats are provided along the longitudinal direction of the guide tube.
The number of tubes 4 and 45 was also several tens, and there was a problem that the replacement of the guide tube was complicated and took time.

The present invention has been made in view of the above problems of the conventional structure.
An object of the present invention is to obtain a fixing structure capable of promptly replacing the guide tube of the bar material feeding device.

[0011]

A guide tube fixing structure for a rod feeding apparatus according to the present invention is characterized in that the support collars of the upper and lower guide tubes 7 and 17 provided with support collars 8 and 18 are arranged at predetermined intervals. In the guide tube fixing structure that is fixed to the receiving seats 1 and 11 provided on the upper frame 12 and the lower frame 2, the lower receiving seat 1 and the lower supporting brim 8 are the arc receiving surface 4 of the lower receiving seat 1. It is axially positioned by the fitting of the pin 3 protruding from the upper end and the fitting hole 9 provided in the corresponding part of the lower support collar 8, and the arc receiving surface 4 and the outer circumference of the support collar 8 are fitted together. The upper seat 11 is provided with a clamp member 15 projecting in at least one of the arc receiving surface side and the width direction of the upper receiving seat at a portion located at both ends of the arc receiving surface 14. At least one of the clamp members 15 is fixed to the upper seat 11 by a screw 16.
The upper support collar 18 is provided with stepped portions 19 which are engaged with the clamp members 15, 15 and which can be fastened and separated from each other.

[0012]

The lower guide tube 7 is placed on the lower receiving seat 1 by its own weight with the outer peripheral surface of the support collar 8 fitted to the circular arc receiving surface 7 of the lower receiving seat 1. The axial position of the lower guide tube is determined by fitting the pin 3 provided on the lower seat and the corresponding fitting hole 9 provided on the outer periphery of the support collar.

The upper guide tube 17 has the outer circumference of the support collar 18 fitted to the circular arc receiving surface 14 of the upper receiving seat 11, and the step members 19, 19 provided at both ends of the circular arc outer peripheral surface.
It is fixed to the upper seat 11 of the upper frame 12 in the state of being fastened at 5.

The upper guide tube 17 is fixed to the upper seat 1 with a screw 16.
1 is loosened by loosening the screw 16, and the upper guide tube 17 is supported by the brim 18
By axially moving the width of the upper seat 11, the fitting with the upper seat 11 is released and the upper seat 11 is removed. The work of removing the upper guide tube is a work of loosening only one of the clamp members 15 provided for each of the upper seats 11, and the labor and the working time are greatly reduced. The lower guide tube 7 is simply lifted and removed.

When mounting the upper guide tube, the support flange 18 and the upper receiving seat 11 are axially displaced from each other, and the portion of the upper guide tube where the supporting flange is not provided is inserted into the recess of the upper receiving seat 11. Then, the upper guide tube is moved in the axial direction, and the step portions 19 and 19 of the support collar are placed on the portions of the clamp members 15 and 15 that project to the side of the seat, and in this state, the support collar 18 is received on the upper side. It is carried out by pushing it into the seat 11 and then fastening the screw 16 provided on each seat to tighten one of the clamp members 15 toward the seat 11. At this time, the clamp material 15 fastened by the screw 16 pushes up one end of the arc outer peripheral surface of the support collar 18, and the support collar 18 slightly rotates along the arc receiving surface 14 to fix the clamp material 15 on the opposite side. And is clamped between the clamp members 15 and 15 and the circular arc receiving surface 14.

In this way, the upper guide tube 17 has the screw 1
Since it is held in a state of being fastened to the upper seat 17 by 6, it is not particularly necessary to fix it in the axial direction, but if it is also fixed in the axial direction, one of the upper seats 11 can be screwed with a screw 2
2 is provided with a presser washer 21 that can be attached and detached.
Secure one of the support collars 18 with.

The lower guide tube 7 is mounted by mounting the support collar 8 on the lower side with the pin 3 provided on the lower seat 1 fitted in the fitting hole 9 provided on the support collar of the lower guide tube. It is just a work to fit the circular arc receiving surface 4 of the seat.

[0018]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a perspective view of the main part thereof. The lower seat 1 is fixed while being mounted on the upper surface of the lower frame 2. A positioning pin 3 erected on the upper surface of the lower frame 2 penetrates through the central portion of the lower seat 1, and the pin 3 projects beyond an arc receiving surface 4 of the lower seat. The pin 3 is fixed by a screw 5 inserted from below the lower frame 2.

The pin 3 is provided on the support collar 8 of the lower guide tube 7.
Is provided with a fitting hole 9 for fitting with the tip of the lower guide tube 7, the lower guide tube 7 fits the pin 3 and the fitting hole 9, and the outer peripheral surface of the support flange 8 is an arc of the lower seat. It is held in a state of being fitted to the receiving surface 4. It should be noted that the pin 3 and the fitting hole 9 only need to be provided at one location in one (integrated) lower guide tube.

The upper seat 11 is provided at the tip of an arm 13 extending from the upper frame 12 above the guide tube. The upper seat 11 is provided with a circular arc receiving surface 14 facing downward, and a clamp member 15 projecting to the circular arc receiving surface side and the side surface side of the receiving seat (see FIG. 2) is provided at both ends of the circular arc receiving surface. It is arranged. The clamp members 15 on both sides are both provided by being fastened to the upper seat 11 with screws 16, 16, but the clamp member 15 on the left side of the figure can be tightened or loosened by tightening or loosening the screws 16. It can be tightened or loosened on the side of the seat 11.

The support flange 18 of the upper guide tube 17 is provided with step portions 19 which engage with the clamp members 15 at the both ends of the outer peripheral surface thereof. This step portion 19 has a support collar 18
Is a height that slightly protrudes from the lower end of the upper seat when fitted to the circular arc receiving surface 14 of the upper seat. Therefore, when the clamp member 15 is fastened with the screw 16 on the left side of the drawing, the clamp member is fastened in a state of being in contact with the step portion 19 on the left side of the support collar.

In the embodiment shown in the drawings, a press washer 21 for pressing the side surface of the support collar 18 of the upper guide tube is attached to the side surface of the upper receiving seat 11 with a screw 22. Although not shown in the figure, a flange for receiving the outer peripheral side surface of the support flange 18 is formed on the side surface on the opposite side of the upper receiving seat 11 provided with the press washer 21, and the support flange 18 and the press washer are provided. It is sandwiched by 21 and defines the axial position of the upper guide tube 17. It suffices to provide one press washer 21 for each (integrated) upper guide tube.

Upper guide tube 17 fixed to the upper seat 11
Is moved upward as shown by an imaginary line in FIG. 1 by moving the upper frame 12 upward by the cylinder 23. The replacement work of the upper and lower guide tubes 7 and 17 is performed with the upper frame 12 moved upward.

When the upper frame 12 is lowered, a guide pipe having a circular cross section is formed by the lower guide pipe 7 and the upper guide pipe 17, and a slit is provided between at least one opposing edge of the upper and lower guide pipes. 24 is formed, and the drive plate 25 described above extends through the slit 24 to the inside of the guide tube. The drive plate 25 of FIG. 1 is fixed via a bracket 27 to a chain 26 stretched along a guide tube.

[0025]

The structure of the present invention described above makes it extremely easy to replace the guide tube of the bar feeder according to the diameter of the bar to be fed, and fix the guide tube with bolts or the like. As compared with the structure having the structure described above, there is an effect that the working time when replacing the guide tube can be reduced to one fifth or less.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment.

FIG. 2 is a perspective view of a main part of the embodiment shown in FIG.

FIG. 3 is an explanatory view schematically showing processing using a bar material feeder.

FIG. 4 is a side view showing the rear end portion of the bar material feeder with the guide tube opened.

FIG. 5 is a sectional view showing an example of a conventional fixing structure.

[Explanation of symbols]

 1 Lower Seat 2 Lower Frame 3 Positioning Pin 4 Circular Receiving Surface 7 Lower Guide Tube 8 Support Collar 9 Fitting Hole 11 Upper Seat 12 Upper Frame 14 Circular Receiving Surface 15 Clamping Material 16 Screw 17 Upper Guide Tube 18 Support Tsuba 19 steps

Claims (1)

[Claims] 1. The support collars of the upper and lower guide tubes (7, 17) provided with support collars (8, 18) at predetermined intervals are replaced with the above-mentioned collars of the upper frame (12) and the lower frame (2) of the device. In the fixing structure of the guide tube of the bar feeding device that is fixed to the receiving seat (1, 11) provided at the position facing (8, 18), the lower receiving seat (1) and the lower supporting flange (8) Is the shaft that is fitted by fitting the pin (3) protruding on the circular receiving surface (4) of the lower seat (1) and the fitting hole (9) provided in the corresponding part of the lower support collar (8). The circular arc receiving surface (4) and the support collar.
It is held by fitting with the outer circumference of the circular arc of (8), and the upper seat (11) has the width of the circular arc receiving surface and the upper seat at the portions located at both ends of the circular arc receiving surface (14). Clamping material (15) protruding in at least one direction is provided.
At least one of the (15) is attached to the upper seat (11) by the screw (16).
The upper support collar (18) can be fastened and separated from each other, and both ends of the arc of the upper support collar (18) are engaged with the clamp member (15, 15) by a step (1
9) The structure for fixing the guide tube of the bar feeding device, characterized in that it is formed.