JPS6056844A - Fixed length feeder for spindle - Google Patents

Abstract

PURPOSE:To facilitate adjusting of fixed length feeding of spindle while to prevent idling, by driving a screw shaft horizontal quick feed fluid pressure cylinder for driving a cam plate and a fixed length feeding drive independently. CONSTITUTION:In order to lift a spindle 11 by predetermined length, the piston rod 25 is lifted by the fluid pressure cylinder 23 while simultaneously the piston rod 39 is moved by predetermined amount to the right by a quick-feed fluid cylinder 37. Consequently, a guide plate 33 will also slide in same direction against the guide rod 35 then contact against a pre-positioned stopper bolt 43 and stop. A screw shaft 15, slider 15 and cam plate 17 will also move in same direction to rotate a proportion arm 5 upward around the pivot shaft 3 thus to lift the spindle 11. With such arrangement, adjusting of fixed length feeding can be facilitated efficiently.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mechanical sizing device for a spindle, and more particularly, to a mechanical sizing device for a spindle that moves the spindle up and down in order to perform cutting, etc. on a workpiece mounted on the spindle. It is something that

As a conventional mechanical sizing device for a spindle, there is one shown in FIGS. 1 to 4.

FIG. 1 is a front view including a cross section of a conventional spindle mechanical sizing device, in which one end of a proportion arm 103 is rotatably supported on a fixed block 101, and a rotatable roller 105 is attached to the other end. has been done. Then, the cam plate 107 that serves as a guide for the roller 105 is attached to the saddle 1.
The slider 111 is mounted on a slider 111 that is slidably slidable in the left and right directions in FIG.

A threaded portion 117 formed on the screw shaft 115 is screwed into a threaded hole 113 formed in the slider 111 for installation. A link 119 is swingably attached to the screw shaft 115, and the screw shaft 115 is slid by the operation of a cylinder 121 attached to one end of the link 119.

A rotatable lift roller 123 is attached to the middle portion of the proportion arm 103, and a spindle 125 is provided in contact with the uppermost end of the lift roller 123. A workpiece (not shown) is attached to the base of the spindle 125. Also, proboscicon arm 1
At the lower end of the middle part of 03, there is a proportion arm 103
Cylinder 1 that operates to follow the vertical rotation of
27 are set up.

A gear 129 is mounted on the tip of the screw 1li1115, and as shown in FIG. 2, a gear 131, such as an idle gear, is meshed with the gear 129 above the gear 129. Further, as shown in FIGS. 3 and 4, radiets 1 to 133 are fixed coaxially with the gear 131 and on the side surface of the gear 131, and a ratchet 135 that rotates or locks the ratchet gear 133 meshes with the radiet gear 133. has been done. The ratchet 135 is fixed to one end of a swing member 137 which is coaxially swingable with the ratchet gear 133.The ratchet 135 is fixed to one end of a swing member 137. A cylinder 139 that operates in the vertical direction to swing the spindle 137 is provided at the upper end of the cylinder 139. Further, the vertical position of the cylinder 139 is adjusted to adjust the fixed feed amount of the spindle 125. An adjustment screw 141 is provided.A stopper 143 is also provided so that the cylinder 139 comes into contact with the lower end of the swinging member 137.

A gear 145 is meshed above the gear 131, and a scale plate 147 is connected to the gear 145.

In the conventional spindle one-area sizing device configured as described above, the cutting tool I tl-tooth is used to cut a workpiece (not shown) mounted on the upper part of the spindle 125.
21 is activated. When the link 119 swings clockwise in FIG. 1 by operating the cylinder 121,
The screw shaft 115 slides to the right. Screw shaft 11
5, the slider 111 makes one movement to the right inside the saddle 109, and the cam plate 107 also moves in the same direction.

By operating the cylinder 127 in synchronization with the movement of the cam plate 107, the proportion arm 103 rotates upward using the fixed block 101 as a fulcrum. As the proportion arm 103 rotates upward, the roller 10
5 rotates while contacting the inside of the cam plate 107, the lift roller 123 further rises, the spindle 125 also rises, and the workpiece is cut.

Thereafter, the link 119 swings counterclockwise due to the operation of the cylinder 121, so that the spindle 125 descends together with the work via the screw shaft 115, cam plate 107, and proportion arm 103'W.

Then, when cutting the workpiece,
The cylinder 139 in FIG. 2 is operated to feed the cylinder by a fixed distance. Due to the operation of the cylinder 139, the ratchet 135 rotates in the counterclockwise direction in FIG. 2 together with the swinging portion 44137, thereby causing the gear 131 to rotate in the same direction. Gear 131
Due to the rotation, the gear 129 rotates clockwise, and the screw shaft 115 also rotates in the same direction.

When the threaded portion 117 of the screw shaft 115 rotates inside the screw hole 113, the slider 111 is moved to the cam plate 107.
At the same time, it slides inside the saddle 109 to the right in FIG. The cylinder 127 is actuated in synchronization with the sliding of the cam play +-107, and the proportion arm 103 is rotated upward about the fixed block 101 as a fulcrum. At this time, the roller 105 is rotating while contacting the upper surface of the cam plate 107.

Then, as the lift roller 123 rises as the proportion arm 103 rotates, the spindle 125 rises and is fed by a fixed length. Further, the rotation of the gear 131 described above is transmitted to the gear 145, so that the scale plate 147 displays the tenth height relative to the constant cutting feed of the spindle 125.

The amount of increase displayed on the scale plate 147 is obtained in advance by turning the adjusting screw 141 by eye. Therefore, even after the cylinder 121 is actuated again after the spindle 125 has been fed by a fixed distance and the workpiece is cut by raising the spindle 125, the adjusting screw 141 is further turned to adjust the fixed feed amount of the spindle on the scale. Board 147
Continue cutting while checking with .

As described above, in the conventional spindle mechanical sizing device, adjustment of the sizing feed amount of the spindle is carried out by repeatedly turning the adjusting screw visually and checking with the scale plate.

Therefore, it takes time to adjust the constant feed amount of the spindle, and since the spindle feed m is constant when cutting a workpiece, etc., there is a problem that the time required to feed the spindle to the workpiece machining start position is wasted. there were.

This invention was devised by focusing on the above-mentioned problems, and is a mechanical sizing method for a spindle that allows easy adjustment of the fixed feed amount of the spindle and eliminates wasted feeding time when not processing. The purpose is to provide a device.

In order to achieve this object, the present invention has a cam plate in which a screw hole is formed in the horizontal direction, and a screw shaft having a threaded portion that is screwed into the screw hole is screwed into the cam plate. By moving the shaft horizontally or avoiding rotation, the cam plate is moved in the same direction as the screw shaft, and the proportion arm in contact with the cam plate swings in the vertical direction, causing the spindle to move up and down. In a mechanical sizing device, a fluid pressure cylinder for rapid feed that moves the screw shaft in the horizontal direction and a drive device for sizing feed that rotates the screw shaft are designed to move separately. It is.

Hereinafter, one embodiment of the present invention will be described in detail based on FIG.

FIG. 5 is a sectional view of a mechanical spindle sizing device, in which one end of a proportion arm 5 is pivoted to a pivot 3 of a fixed block 1 so as to be able to freely rotate in the vertical direction, and a rotatable roller 7 is attached to the other end. has been done. Furthermore, proportion arm 5
Rotatable riffs 1 to 0-ra 9 are attached to the middle part of the
At the top end of the lift roller 9 is a spindle 1 that can be raised and lowered.
1 are provided in contact with each other. A workpiece (not shown) is attached to the upper part of the spindle 11.

On the other hand, a slider 15 that is slidable in the horizontal direction is inserted into the nadle 13, and a pair of cam plates 17 are mounted inside the slider 15 on the proportion arm 5 side so as to face each other in the vertical direction. The upper cam plate 17 has a slope 19 on the lower right in FIG.
7 is on the right side of an upward slope 21. For example, in this embodiment, the slope 19.21 has a slope of 1/20.

Then, the roller 7 is moved to the slope 1 of this cam plate 17.
The cam plays 1 to 17 are disposed between the cam plate 9 and the slope 21 and move while rotating while contacting the slope 19 or the slope 21.

The roller 7 and the riffs 1 to 0-ra 9 are moved so as to follow the rotation of the proportion arm 5 due to the movement of the cam play 1-17.
A fluid pressure cylinder 23 that operates in the vertical direction is disposed on the lower side of the saddle 13 between the two and the upper end of the piston rod 25 of this cylinder 23 is attached to the proportion arm 5.

A screw hole 27 is bored on the opposite side of the slider 15 from the proportion arm 5 in the sliding direction of the slider 15. A screw shaft 31 having a threaded portion 29 that is screwed into the threaded hole 27 is attached to the slider 15. The pitch of the screw hole 27 and the screw portion 29 described later is 8.0 mm in this embodiment.

One end of the guide plates 1 to 33 is attached to the screw shaft 31 on the side opposite to the side where the threaded portion 29 of the screw shaft 31 is formed, and the other end is attached to a guide rod 35 extending in the left-right direction. . The screw shaft 31 is rotatable relative to the guide plate 33 but cannot be moved in the axial direction, and the guide plate 33 is slidable relative to the guide rod 35.

Proportion arm 5 at the middle of the guide plate 33
A hydraulic cylinder 37 for rapid feed is disposed on the side, one end of a piston rod 39 of this cylinder 37 is attached to the intermediate portion of the guide plate 33, and the other end projects from the hydraulic cylinder 37. In addition, the guide plate 33
On the side opposite to the fluid pressure cylinder 37, there is a guide plate 3.
Stopper pins 1 to 43 whose positions can be adjusted freely are disposed so that a stopper pin 41 provided on the guide plate 33 comes into contact with the guide plate 33 to stop the guide plate 3 when the pin 3 moves to the right in FIG. 5 together with the souffle shaft 31. Also, piston rod 3
9 moves to the left, this piston rod 39
A stopper 45 is provided, which is brought into contact with and stopped.

A driven gear 47 is attached to the screw shaft 31 on the side of the proportion arm 5 of the guide plate 1-33. The driven gear 47 includes a gear 4 as an idle gear.
9.51 are meshed, and the tooth contact of gears 49 and 51 must be adjusted to minimize backlash.
(It is being pulled.

In this embodiment, the gear ratio between the driven gear 47 and the gears 49 and 51 is 1:1.

A reduction gear 53 is mounted coaxially with the gears 49 and 51, and a reduction gear 55 is meshed with the reduction gear 53. In this embodiment, the reduction ratio is 115. And reduction gear 55
A driving device 57, such as a stamping motor, is connected to. In this embodiment, the screw shaft 31 rotates by 0.8° per 1.8° rotation of the drive device 57. Gears etc. are set to slide by '0002mm. In addition, the gears 4 are arranged so that each gear does not become free when the drive device 57 is stopped.
Five OFF brake gears are installed on the same axis as 9.51.

Next, the operation of the area sizing device of the spindle configured as described above will be explained.

For example, assuming that the spindle 11 is to be moved 3.00 mm (rapid feed 2.50 mm + fixed size feed 0.50 mm) from the original position, first operate the fluid pressure cylinder 23 to raise the screw 1 rod 25. Almost simultaneously, the fluid pressure cylinder 37 for rapid feed is operated to move the piston rod 3.
9 is moved 10.0 mm to the right in FIG. As the piston rod 39 moves, the blade plate 33 also slides in the same direction with respect to the guide rod 35, and the stopper pin 41
is the stopper pole 1-4 whose stop position is adjusted in advance.
It comes into contact with 3 and stops.

As the guide plate 33 moves, the Scrico shaft 31 also moves 100 mm in the same direction with respect to the driven gear 47.
The slider 15 also slides along with the cam plate 17 within the saddle 13 by 100 mm in the same direction. When the nonom plate 17 moves to the right in FIG.
9, the proportion arm 5 rotates upward about the pivot 3 as a fulcrum. The upward rotation of the proportion arm 5 is caused by the aforementioned fluid pressure cylinder 23.

Also, the cam plate 17 is moved 100+r toward the right in FIG.
When the roller 7 moves +m, the slope 19 has a slope of 1/20, so the roller 7 rises by 5.00 mm. Since the lit roller 9 is disposed in the middle of the proportion arm 5, the roller 7 is raised by 5.00 mm. Then, Su7
1 to roller 9 is 2.50 mn1''2tjl-. As the lift roller 9 rises, the spindle 11 also moves 2.50 mm.
It ascends and approaches a workpiece (not shown) to prepare for cutting, etc.

In this way, rapid forwarding of 2.50 mm is performed. Next, in the case of fixed-dimension feeding for cutting or the like on a workpiece (not shown), the drive device 57 is driven while the fluid pressure cylinder 23 is operated, as in the case of rapid feeding. This drive device 57
By rotating the gear 500° (12.5 rotations), the reduction gear 55 also rotates 12.5 rotations. The reduction gear 55 is 12.
After 5 rotations, the reduction ratio is 115, so the reduction gear 553 rotates 2.5 rotations. As the reduction gear 53 rotates, the gear 49.51 also rotates 2.5 revolutions. The rotation of the gears 49 and 51 is then transmitted to the driven gear 47.
．． Since the gear ratio between 9.51 and the driven gear 47 is 1:1, the screw shaft 31 also rotates 2.5 revolutions.

Since the pitch of the threaded portion 29 of the Scrico shaft 31 is 8.0 mm, when the threaded portion 29 rotates 2.5 times inside the screw hole 27 of the slider 15, the slider 15 moves inside the saddle 13 to the right in FIG. 2On+mf habits. Slider 15
When the cam plate 17 also moves 20II1m at the same time, the slope 19 has a slope of 1/20, so the roller 7 moves 1.0m.
It will rise by 0mm.

Since the lift roller 9 is disposed in the middle of the proportion arm 5, when the roller 7 rises by 1 mm, the lift roller 9 rises by 0.5 om. Riff 1-
As the roller 9 rises, the spindle 11 also rises by 0.50 mm.

In this way, a constant feed of 0.50 mm is performed to perform cutting work on a workpiece (not shown), and in combination with the above-mentioned rapid feed ff 12.50 mm, the spindle 11 can be raised 3.00111111 from the original position. can.

Next, the spindle 11 is raised 1213. The tool □, which increases the feed amount by 0.01 m1 to oomm and performs cutting work on a workpiece not shown, is 0.50 mm above.
The drive device 57 is rotated to 90' in the same way as when performing fixed-dimension feeding.
(1/4 rotation) spindle 11 is 0.0
It will rise by 1mm.

Note that the formula for calculating the amount of rise or fall of the spindle 11 is not shown below.

(Leaving space below) 1 Rapid feed amount = Rapid feed cylinder stroke x 20 The cam plate is moved in the same direction as the screw shaft by moving or rotating the screw shaft horizontally, and the proportion arm in contact with the cam plate moves vertically. A mechanical sizing device for the spindle that moves the spindle up and down by swinging includes a fluid pressure cylinder for rapid feed that moves the screw shaft in the horizontal direction, and a sizing device that rotates and rotates the screw shaft. A drive device for feeding is provided for separate movement.

Therefore, it is possible to easily obtain an arbitrary predetermined size feed of the spindle, and also to eliminate wasted feeding time.

Note that this invention is not limited to the above-mentioned embodiment, and the invention can be implemented in modes other than the above-mentioned embodiment.

[Brief explanation of drawings]

Figure 1 is a front view including a cross section of a conventional spindle mechanical timing device, and Figure 2 is the right side of Figure 1 including a cross section showing a sizing feed mechanism that is added to the conventional spindle mechanical timing device. 3 is a cross-sectional view taken along the line ■-■ in FIG. 2, FIG. 4 is a cross-sectional view taken along the line IV in FIG. 2, and FIG. Front view including. (Explanation of symbols representing main parts of the drawing) 5... Proportion arm 11... Spindle 17... Cam plate 27.
...Screw hole 29...Threaded part 31...Screw shaft 37...Fluid pressure cylinder 57
... Drive device 95 Fig. 2'' - □ 282 - Fig. 3 11:1 Fig. 4 +35 / ljl 155 1jl

Claims (1)

[Claims] A screw shaft having a threaded portion that is screwed into the screw hole is screwed onto a cam plate having a screw hole drilled in the horizontal direction, and the screw shaft is moved in the horizontal direction. In a spindle mechanical sizing device that moves the spindle up and down by moving the cam plate in the same direction as the screw shaft and swinging the proportion arm in contact with the cam plays 1 to up and down, the screw A mechanical sizing device for a spindle, characterized in that a hydraulic cylinder for rapid feed that moves the shaft in the horizontal direction and a drive device for sizing feed that rotates the screw shaft are provided so as to move them separately. .