JPS5964254A - Cam-type profiling device - Google Patents

Abstract

PURPOSE:To heighten the accuracy of machining, by causing a first moving member to move in the axial direction along the surface of a face cam through the action of a rolling member and by fitting a second moving member in the first moving member so that the second moving member cannot rotate relative to the first moving member. CONSTITUTION:When pressure oil is applied to a hydraulic cylinder 49 through an oil supply/drain port 52a and a first moving member 45 is caused to move leftward by a roller 12 sliding on the surface 10a of a rotating face cam 10, a second moving member 47 is caused to move leftward through the action of the cylinder 49, a side cover 51 and a piston 50. As a result, a tool 13 supported on the second moving member 47 is moved leftward to copy the profile of the cam surface 10a on a workpiece. When pressure oil is applied through another supply/drain port 52b, the second moving member 47 is caused to slide in the hole 43 of the first moving member 45 through the action of the piston 50 so that a groove is cut on the peripheral surface of the workpiece by the tool 13. The roller 12 acts in response to the tip of the groove to displace the tool 13 for copying. According to this constitution, accurate copying is enabled to heighten the accuracy of machining.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a cam-type copying process suitable for a cam-type copying process that requires high precision, such as cutting the entire inclined tape guide surface of a head cylinder used in a magnetic recording/reproducing device. It is related to the device.

Conventionally, this type of cam-type copying machine has been implemented, for example, as shown in FIG. That is, in the same figure,
1 is the main body, and the driving device 2 and copy processing equipment are all mounted on the top surface. One of the drive devices 2 is composed of a motor 4 and a headstock 5. The motor 4 has a pulley 6 fixed to its shaft end, and the headstock 5 rotatably supports a main shaft 7. A pulley 9, which is connected to the pulley 6 through the belt 8, is fixed to one end, and a front cam 10 and a workpiece 11 are fixed to the other end so that they are located at the same central position. The details of the structure of the other copying device will be described later, but the basic principle of its structure is that the roller 1 is placed on the cam surface 10a of the front cam 10 in the direction of the arrow.
2 moved, the cutting tool 13 moved in synchronization with this to transfer the profile of the cam surface 10a to the workpiece 11, and at the same time, the cutting tool 13 was moved in the direction of the arrow independently from the movement of the roller 12. At this time, a tape running surface 11a'i of a predetermined length is cut on the outer peripheral surface of the workpiece 11, and the profile kE of the cam surface 10a is copied onto the stepped end surface 11b of this tape running surface 11a. Therefore, in order to accurately transfer the profile of the cam surface 10a to the workpiece 11, the copying device q needs to transfer the profile of the cam surface 10a onto the workpiece 11.
2 and byte 13 must be precisely synchronized. To this end, it is necessary that the transmission mechanism between the roller 12 and the cutting tool 13 has as little error as possible during movement.

On the other hand, an example of a conventional copy processing device is shown in FIGS. 2 to 5.

That is, Fig. 2 is a bottom view showing the conventional copying processing device, and Fig. 3 is a bottom view showing the conventional copying processing device.
The figure is a cross-sectional view taken along the T-1 arrow in Figure 2, and Figure 4 is a 1--1 in Figure 3.
11 arrow section front section], FIG. 5 shows the fir-J [
[This is a cross-sectional front view in the direction of arrows. In the same figure, J4 has a rectangular cross section and is a body movably supported by the main body 1, and a circular cylinder 14 that penetrates in the longitudinal direction of the center.
a, and a square hole 1/Ib connected to this cylinder 14a and penetrating in a direction perpendicular to the longitudinal direction.

The width of this square hole 14b is the width B of the slider 24, which will be described later.
, tj are also made thick so that the slider 24 can move in the direction of insertion within the rectangular hole 14b. 15 is a first piston having a completely circular cross section, and has a small diameter part 15a and a large diameter part 15b that are connected to each other on the outer peripheral part,
A small diameter cylinder 15c and a large diameter cylinder 15d that are connected to each other are formed inside. The small diameter portion 15a is slidably supported in the longitudinal direction within the cylinder 14a of the body 14, and has a pin 16 at its tip to rotatably support the roller 12, and has a substantially central portion that is the same as the square hole 14b. A rectangular hole 17 is provided which connects in shape. Large diameter portion 15
A tip protrusion 18a is provided on the rear end surface of the large diameter cylinder 1.
The side cover 18 is fastened with bolts 19 so as to be inserted into the inner end surface of the side cover 5d. This side cover 18 has a part of its outer periphery protruding, and the roller 12 is always connected to the front cam 10 through the first piston 15 between this side cover 18 and the body 14.
A spring 20 for pressing the cam surface 10a is inserted.

21 is the second piston, and the upper part and the fourth part are connected to the small diameter part 21a movably supported in the small diameter cylinder 15e of the first piston 15 and the small diameter part 21a movably supported in the small diameter cylinder 15e of the first piston 15. The large diameter portion 21b is fixed to the portion 21a and is movably supported within the first piston 150 and the large diameter cylinder 15d.
Formed from 1. ing. The small diameter portion 21a is the first
A square hole 22 connected to the square hole 37 of the piston 150 and formed in substantially the same shape as a slider 24 to be described later, and a set screw 23 for fixing the slider 24 within this square hole 22. has been established. The slider 24i-1:
It has a rectangular cross section, and has a cutting tool support piece 25 fixed to one end that moves on one end surface of the body 14, and a guide plate 26 that moves on the other end surface of the body 14 fastened to the other end. The cutting tool supporting piece 25 fixes the cutting tool 13 with a set screw 27. Note that 28 a and 28 b in the figure represent the small diameter portion 15 a and the large diameter portion 15 of the first piston 15 .
b, the small diameter portion 21a and the large diameter portion 2 of the second piston 21
1b, respectively. Also 29
Numerals a and 29b are oil supply and discharge ports formed in the large diameter portion 15b of the first piston 15 and the side cover 18, respectively. With the above configuration, the large diameter cylinder 15d of the first piston 15 is opened from one oil supply/discharge port 29a to the inside K<2 piston 21
Pressure oil is supplied to the left chamber of the large diameter portion 21b of the large diameter portion 21b.
'ff: Pressed by the tip protrusion 18a of the Zydokanoku 18. In this state, when the roller 12 moving the cam surface 10a of the front cam 10 moves the first piston 15 to the left with respect to FIG. 3, the second piston 21 moves to the left via the side cover 18. Therefore, the slider 13 moves to the left via the slider 24 to transfer the profile of the cam surface 10a of the cam 10 onto the workpiece 11.

Further, when pressure oil is discharged from one oil supply/discharge port 29a and pressure oil is supplied from the other oil supply/discharge port 29b, the second piston 2
1 moves inside the first piston 15 and moves the cutting tool 13 to the left via the slider 24, so that the workpiece 11
A tape running surface 10a is cut on the outer peripheral surface of the tape running surface 10a, and the profile of the cam surface 10a is transferred to the stepped end surface 10b of the tape running surface 10a by moving the grooves 13 in conjunction with the roller 12.

However, in the above configuration, since the first piston 15 and the second piston 21 have a circular cross section, it is not possible to maintain the cutting edge position of the cutting tool 13 in the circumferential direction. However, since the slider 24 moves within the rectangular hole 14a of the body 14 and the rectangular hole 14b of the first piston b,
Naturally, there is some gap between the two 24 and 1411- and 14b, so it is difficult to accurately maintain the position of the cutting edge of the cutting tool 13 in the circumferential direction. , 17, the tracking ability of the cutting tool 13 with respect to the roller 12 is reduced. Furthermore, since the first piston 15 and the holder 14 are interposed between the second piston 21 and the cutting edge position of the tool 13, the lengths of both 21 and 13 become longer.
When the workpiece 11 is cut with the cutting tool 13, a bending force is generated in the slider 24, making it impossible to accurately synchronize the roller 12 and the cutting tool 13. Therefore,
- The profile of the cam surface 10a of the cam 10 cannot be transferred to the metal workpiece 11 by the picket 13, and as a result, highly accurate machining cannot be performed.

Therefore, conventional methods have been implemented as shown in FIGS. 6 to 8. That is, FIG. 6 is a partially cross-sectional side view showing another embodiment of the conventional copying machine, FIG. 7 is a top view thereof, and FIG. 8 is a cross-sectional front view taken in the direction of the ■ arrow in FIG. . In the figure, reference numeral 30 denotes a base, and a dovetail groove 30a is formed in the longitudinal direction on the upper surface, and a spring retainer 31 is fixed upright on the rear end surface. Reference numeral 32 denotes a first slider, which is mounted on the upper surface of the base 30 so as to be slidable in the longitudinal direction via a dovetail groove 30a, and has a bracket 3 having a shape of
3 is fixed, and a dovetail groove 34 is opened on the top surface to extend M't in the longitudinal direction.
A second slider 35 is freely mounted, and a hydraulic cylinder 36 is fixed to the upper part of the rear end surface. Bracket 3 above
3 rotatably supports the roller 12 via a pin 37 at its upper end point μ. The second slider 35 is formed into a rectangular shape, and has a hole 38 penetrating through the interior in a direction perpendicular to the longitudinal direction, and the nut 13 is fixed in the hole 38 with a set screw 39. . The above 7 free pressure cylinder 36 is 2
A piston 40 is provided which is moved by the supply of pressure oil from the oil supply and discharge ports 36a and 36b, and the second slider 35 is fixed to the tip of the piston 40. A spring 41 is inserted between the spring retainer 31 and the first slider 32, and presses the roller 12 against the cam surface 10a of the cam 10 via the first slider 32 and bracket 33. Because of the above configuration,
The piston 40 is heated by pressure oil from one oil supply/discharge port 36a.
is pressed against the right end inside the hydraulic cylinder 36. In this state, when the roller 12 moves to the left in the figure by the cam surface 10a of the cam 10, the first slider 32, hydraulic cylinder 36, piston 40, and second slider 35f! The cutting tool 13 moves to the left through the cam surface 1 of the cam 10.
The profile 0a is transferred to the workpiece 11. Furthermore, when pressure oil is discharged through one oil supply/discharge port 3Ga and pressure oil is supplied through the other oil supply/discharge port 36b, the piston 40 moves to the left on the first slider 32 due to the hydraulic pressure. A tape running surface IUa f is cut on the outer peripheral surface of the workpiece 11, and a cam 10 is attached to the stepped end surface 10b of the tape running surface IUa by a cutting tool 13 that moves in conjunction with the roller 12.
The profile of the cam surface 10a is transferred.

The above structure has an advantage over the above embodiments in that the position of the cutting edge of the cutting tool 13 in the circumferential direction can be determined by the two dovetail grooves 3oa and a''i.

However, on the other hand, since the two dovetail grooves 30a34 are provided and the first slider 32 and the second slider 35 move at eccentric positions, the first piston and the second piston are coaxial with each other as in the above embodiment. The overall shape becomes larger compared to when moving above the center. Further, since the roller 12 is supported at the upper end of the upright bracket 33, the position where the spring 41 presses and the cam surface 10a of the row 212 are
Bracket 3 is eccentric because the pressing position is eccentric.
3 is bent, causing an error in the amount of movement between the roller 12 and the first slider 32. In addition, since the first slider 32 and the second slider 35 move at eccentric positions relative to each other, an error in the amount of movement occurs due to viscous resistance of both sliders 32 and 35. The profile of the cam surface 10a cannot be accurately transferred to the workpiece 11.

In this way, with conventional cam-type copying machines, it is not possible to accurately transfer the profile of the cam surface of the cam to the workpiece, so we cut the inclined tape guide surface of the head cylinder used in magnetic recording and playback devices. This poses a problem when high precision is required, such as when processing.

The present invention eliminates the above-mentioned drawbacks, and provides a complete cam-type copying machine that has a smaller overall shape and enables high-precision machining by accurately transferring the entire profile of the cam surface of the turtle to the workpiece. C The present invention was invented to achieve the above object, and one of the inventions is to move in the axial direction along the cam surface of the front cam that rotates on the same axis as the workpiece. A first moving body, and a second moving body that supports a tool for cutting the entire workpiece and is connected to a piston that moves in a cylinder supported by the first moving body and moves in the axial direction. , in a cam-type copying device that moves the second moving body synchronously and independently of the first moving body to transfer the profile of the cam surface to the workpiece, the first moving body is supported; The second movable body is fixed to the first movable body only in the rotational direction and movable in the axial direction via a rolling member, and the second movable body is fixed to the first movable body only in the rotational direction. One of the other inventions is a first movable body that moves in the axial direction on a cam surface of a front cam that rotates on the same axis as the workpiece, and a first moving body that cuts the workpiece. A second moving body that supports a tool and moves in the axial direction by being connected to a piston that moves within a cylinder supported by the first moving body is provided, and the second moving body is connected to the piston that moves in a cylinder supported by the first moving body, and the second moving body is connected to the piston that moves in a cylinder supported by the first moving body. In a cam-type copying device that transfers the profile of the cam surface to a workpiece by moving synchronously and independently, the first moving body is supported by the first moving body, and the cam surface is moved in that manner. The invention is characterized in that the rolling member, the above-mentioned piston, and the above-mentioned; This invention is characterized by the combination of two inventions.

Examples will be described below with reference to FIGS. 9-1 and 10. FIG. 9 is a partially sectional side view showing an embodiment of the present invention, and FIG. 10 is a front view thereof. Note that parts that are the same as those in FIG. 1 are designated by the same reference numerals.

In the figure, reference numeral 42 denotes a body, and a square hole 43 opening at one end surface is provided, and a ball is inserted into the hole 43 at a position on the upper and lower surfaces that intersects the vertical center line a-b passing through the center point o1. A first movable body 45 is slidably supported via the first movable body 44. The first movable body 45 has a rectangular cross section, and is rotatably supported by a roller 12 and a bin 16 on a horizontal axis passing through the center point O in the hole 43 at its tip end, and has an opening at one end surface and extends vertically. A rectangular hole 46 is provided such that the center point of the hole 46 coincides with the center point O of the hole 43.

Reference numeral 47 designates a second moving body having a rectangular cross section, and the hole 46
It is slidably supported inside via a ball 48' and is fastened to one end surface with a set screw 54. Reference numeral 49 is a hydraulic cylinder, and the tip thereof is inserted into the second movable body 4.
7 is slidably supported, and is fixed to the rear end of the second moving body 47 such that the entire tip of the piston 50 is located on the horizontal axis passing through the center point Q in the hole 43. A side cover 51 into which the tip protrusion 51a is inserted is fastened to the rear end. 52a and 52b are 2
The hydraulic cylinder 49 and the side cover 51 each have separate oil supply and discharge ports. A spring 53 is inserted between the rear end surface of the body 42 and the upper end of the side cover 51, and the roller 12 is always pressed against the cam surface 10a of the front cam 10 via the hydraulic cylinder 49 and the first moving body 45. It is being pressed by

With the above configuration, pressure oil is supplied from one oil supply/discharge port 52a to the left chamber of the piston 50 in the hydraulic cylinder 49, and the piston 50i is pressed against the tip protrusion 51a of the side cover 51. In this state, when the first moving body 45 is moved to the left with respect to FIG. 9, the hydraulic cylinder 49 side cutter (51 piston Since the second moving body 47 moves to the left via the second moving body 47, the feeder 13 (supported by the second moving body 47) moves to the left and the profile of the cam surface 10a of the cam 10 is applied to the workpiece 11. to be transcribed.

Further, when pressure oil is discharged from one oil supply/discharge port 52a and pressure oil is supplied from the other oil supply/discharge port 52b, the second movable body 47 is moved to the first movable body 45 via the piston 50 by the hydraulic pressure.
Inside the hole 43'f: Slides into the workpiece 11 at the hole 13
Grooves 10a to 10f are cut on the outer peripheral surface of the cam surface 10a, and a cutting tool 13 moves in conjunction with the roller 12 to transfer the profile of the cam surface 10a to the tip of the groove 10a.

Next, FIGS. 11 and 1 show another embodiment 2 of the present invention.
This will be explained with reference to two figures. FIG. 11 is a partially sectional side view showing another embodiment of the present invention, and FIG. 12 is a front view thereof.

In this embodiment, body 5 is different from the previous embodiment.
The position of the ball 44 inserted between the rectangular hole 55a of No. 5 and the first movable body 56 having a rectangular cross section is determined from the vertical center line a-b passing through the center point o1 of the rectangular hole 55a. The difference is that it is eccentrically inward, but other than this, it is the same as the previous embodiment.

In this embodiment, even if a manufacturing error occurs in the ball 44 portion and the ball 48 portion, they will not interfere with each other because they are not on the same axis a-b in the vertical direction. Therefore, manufacturing is easier than in the previous embodiments.

In both of the above embodiments, the first movable body and the second movable body are formed in a rectangular shape, and the hole in the body into which they are all inserted and the hole in the first movable body are formed in a rectangular shape. It is clear that the first moving body and the second moving body are not limited to this as long as the rotation direction is fixed. Also, since the first moving body moves about 300 times per minute, It is necessary to insert the ball between the hole in the body, but the second
Since the movable body moves at a relatively low rotation speed within the hole of the first movable body, there is no need to provide a ball between the movable body and the hole of the first movable body.

Furthermore, it is also conceivable to insert a rolling bearing instead of the balls between the first moving body and the hole in the body.

As described below, the one-piece first moving body of the present invention is fixed to the body supporting it only in the rotational direction, and is provided so as to be movable in the axial direction via the rolling member,
Since the second moving body is provided to be fixed to the first moving body only in the rotational direction, the cutting edge position of the tool in the circumferential direction can be easily positioned with a simple configuration, and the first movement The amount of gap between the two bodies and the amount of gap between the first moving body and the second moving body can be minimized. It is possible to improve the processing accuracy by accurately transferring the image to the image.

Another aspect of the present invention is that the first moving body, the rolling member sliding on the cam surface, the piston in the cylinder, and the second moving body are all moved along the same horizontal axis. Because of this, the hydraulic pressure of the piston and the pressing force of the rolling member can operate on the same axis, and the distance from the center point of the second moving body to the cutting edge position of the tool can be reduced. By this, it is possible to prevent errors in the amount of movement between the rolling member and the tool. It is possible to improve the processing efficiency by accurately transferring the image to the image.

Furthermore, another aspect of the present invention has the effect that by combining the above two inventions, the overall shape can be made smaller and the processing accuracy of the workpiece can be further improved.

[Brief explanation of drawings]

Figure 1 is a top view of a conventional cam-type copying machine;
The figure is a bottom view showing an example of the copying processing device, a sectional view taken along the line II in FIG. 2 of FIG. 3, and FIG. -I
The cross-sectional view shown in FIG. 5 is Jl[]l! of FIG. 4. 6 is a partially sectional side view showing another example of the conventional copying processing device, FIG. 7 is a top view thereof, FIG. 8 is a sectional view taken in the direction of the ■ arrow in FIG. The figures are a partially sectional side view showing one embodiment of the present invention, Fig. 10 is a left side view thereof, Fig. 11 is a partially sectional side view showing another embodiment of the present invention, and Fig. 12 is its left side view. It is a front view. 10...Front cam, 10a...Cam surface, 11...Workpiece, 12...Roller, 42.55...Body,
43.46...hole 44.48...ball, 45.5
6. First moving body, 47... Second moving body, 49... Hydraulic cylinder, 50... Piston 51-9. Side cover, 53...spring! 1.Ryo No. 72 Certain 6 drawings 9 drawings/lν1 Procedural amendment, 583.2. ．． 3 special rrr IJ-long i'7 1 maki, 1\i'I's large and small sho+] 15 phi 111+, t'11111'i No. 171
026-: Name of the invention Cam type copying processing device
Person (l...Tokyo "-111-ku Otemachi 2-6-2;
Lunar Elephant Map

Claims (3)

[Claims] (1) A first movable body that moves in the axial direction on the cam surface of a front cam that rotates fully on the same axis as the workpiece, and a tool that cuts the workpiece that supports the first movement. A second moving body connected to a piston moving in a cylinder supported by the body and moving in the axial direction is provided, and the second moving body and the first moving body are moved synchronously and independently. In the cam-type copying device that transfers the profile ffi of the cam surface to the workpiece, the first movable body is fixed only in the rotational direction to the body that fully supports the fL, and is movable in the axial direction via a rolling member. A cam-type copying device, characterized in that the second movable body is fixed to the first movable body only in the rotational direction. (2) A first movable body that moves in the axial direction on the cam surface of the front cam that rotates fully on the same axis as the workpiece, and a tool that completely cuts the workpiece, supporting the first movement. A second moving body is provided that moves in the axial direction by being connected to a piston that moves within a cylinder supported by the body, and the second moving body is moved synchronously and independently of the first moving body. A cam-type copying device that transfers the profile of the cam surface to a workpiece by using the first moving body; a rolling member supported by the first moving body and moving along the cam surface; A cam-type copying device characterized in that the piston and the second movable body are configured to be movable on the same axis. (3) A first moving body that moves in the axial direction on the cam surface of the front cam that rotates on the same axis as the workpiece, and a tool that cuts the workpiece, and supports the first movement. A second moving body is provided which is connected to a piston that moves in a cylinder supported by the body and moves in the axial direction, and the second moving body and the first moving body are moved synchronously and independently to move the cam. A cam-type copying device is used to transfer the surface profile onto the metal workpiece, and the first movable body is fixed only in the rotational direction to the body that fully supports it, and is rotated in the axial direction via the rolling member metal. a rolling member supported by the first movable body and movable by the cam surface;
The second movable body is provided to be fixed to the first movable body only in the rotational direction, and the first movable body, the rolling member, the piston, and the second movable body are movable with respect to each other on the same axis in a horizontal direction. A cam-type copying machine with all the features provided.