JPS5930659A - Method and machine for obtaining work piece with cam groove - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is for obtaining by grinding a grooved surface forming the working surface of a cam around a straight longitudinal axis.

The target is a manufacturing method consisting of the following steps: j.

A grindstone that rotates around a shaft and has an annular work surface is prepared, and the annular work surface of the grindstone is brought into contact with the grooved surface of the cam to be obtained, and the cam shaft is vibrated around the vibration axis in a constant direction. Machining of the whetstone is performed by giving angular motion and giving translational motion to the whetstone that can move the work surface of the whetstone in a linear direction, and by interconnecting the rotational motion of the cam around the cam shaft, the vibrational motion of the cam, and the translational motion of the whetstone. Control means are provided to keep the surface in constant contact with the grooved work surface of the cam. The annular working pole of the grinding wheel consists of a cylinder with a constant circular cross section centered around the rotation axis of the grinding wheel. In addition, the method also includes the steps of imparting a second angular vibration motion to the camshaft about the vibration axis, and imparting a second translational motion along a given linear direction to the grindstone axis. The control means couples the second angular vibration motion of the force/mu axis with the tenth angular pickup motion of the cam shaft and the second translational motion of the grinding wheel with the first translational motion of the grinding wheel, so that the cam In any working position, the grooved surface segment of the cam that is in contact with the working surface of the grinding wheel is parallel to the axis of the grinding wheel;

The contact between the working surface of the grinding wheel and the grooved surface of the cam extends over the entire segment of the cam. The present invention also includes: (
The present invention is also directed to a machine for obtaining, by grinding, a grooved surface forming the machined surface of a cam according to the manufacturing method described in the first claim. This machine consists of a work head that is supported by a fixed structure so that it can rotate around an axis of vibration whose direction is constant, and a workpiece feed table (workpiece slide) is attached to this spatula r. This sly vK is rotatable around its vertical axis and has a cam attached to it.
The grinding wheel head is equipped with a work spindle having a grinding wheel coaxially fixed thereon so as to be rotatable around the axis. whetstone stand wheel e
pind, 1e 5tock is slidably supported by a fixed structure so that the axis of rotation of the grindstone can be translated along a predetermined linear trajectory. The control means are
Rotation of the cam around the R axis, angular movement of the work head around the oscillating axis, and a slidable grinding wheel supporting the work spindle;
wheel Bp1n+le 5tack translational movement, to realize the predetermined relationship between these 6 parties.

The working surface of the grinding wheel remains in constant contact with the grooved surface of the cam. The grinding wheel has a cylindrical working surface of a constant circular cross section arranged coaxially with the work spindle, so that the rotation axis of the grinding wheel can perform a second translational movement along a predetermined linear trajectory to the work spindle 1. , the grindstone head is rotatably attached to a work slide slidably supported by wheels 5pind and 1eθtock. The workpiece slide, on which the cam to be obtained is rotatably mounted, is supported around the vibration axis by a support plate connected to the workpiece head. A control means is provided for mutually linking the angular movement of the workpiece slide around the vibration axis with the angular vibration movement of the workpiece head, and the translational movement of the slide of the machine main bearing with the translational movement of the grindstone head. Because there are
In any working position of the cam, the grooved surface segment of the cam that is in contact with the grinding wheel σ) will be aligned parallel to the axis of the grinding wheel, so that the working surface of the grinding wheel and the grooved surface of the cam contact extends over the entire segment.

The present invention relates to a manufacturing method for obtaining, by grinding, a grooved surface extending around a linear vertical axis forming a machined surface of a cam, and a machine for realizing this manufacturing method.

In particular, the present invention is applicable to the same applicant's previous French patent application No. 8.
, No. 604, 255 (filed on June 16, 1986, filed 1, published in Japan, 1ii (+?) Prepare a grinding wheel, bring the annular work surface of the grinding wheel into contact with the grooved surface of the cam to be obtained, rotate the cam around its axis, and attach an angle to this cam shaft that vibrates around the axis of vibration whose direction is constant. A motion is given to the grindstone, and a translational movement that allows the work surface of the grindstone to move in a given linear direction is given to the grindstone, and the rotational movement of the cam around the camshaft, the vibrational movement of the camshaft, and the translational movement of the grindstone are interconnected. The work surface of the grinding wheel is kept in constant contact with the grooved surface of the cam (control means are provided).

Similarly, the machine according to the above-mentioned application is also of Fti iA consisting of a work head supported by a fixed structure so as to be able to rotate around an axis of vibration in a fixed direction, and this work head has a work slide. The cam to be obtained is attached to the workpiece slide so that it can rotate around its vertical axis, and the work spindle with a grinding wheel fixed coaxially to the tool rest is mounted around the axis of the tool rest. The turret is pivotally mounted, and the turret is slidably supported by a fixed structure of the machine for translational movement of the axis of rotation of the grinding wheel along a predetermined linear trajectory, and is A control means is also provided to realize a predetermined relationship between the rotation, angular movement of the work head about the vibration axis, and translational movement of the slidable tool rest supporting the work spindle, and this predetermined This relationship keeps the work surface of the grinding wheel in constant contact with the grooved surface of the cam.

The manufacturing method and machine detailed above are according to conventionally known technology.
Requires the use of a flat grindstone, ie a grindstone with a working surface belonging to a plane.

The object of the present invention is a manufacturing method and a machine for obtaining, by grinding, a grooved surface that covers the circumference of a straight vertical axis that forms the machined surface of a cam, similar to the above-mentioned type, but which produces a machined surface that belongs to a cylinder with a constant cross section. The object of the present invention is to realize a manufacturing method and a machine that utilizes a cylindrical grindstone.

The working surface is made of a cylinder with a constant circular cross section centered on the rotational axis of the grindstone, and the camshaft is given a second angular vibration motion around a second vibration axis, and the work surface is made of a cylinder having a constant circular cross section centered on the rotational axis of the grindstone, and the camshaft is given a second angular vibration motion around a second vibration axis, and is a further step of imparting a second translational movement to the grinding wheel, a second oscillatory angular movement of the camshaft being coupled to a first oscillatory angular movement of this shaft, and a second translational movement of the grinding wheel being coupled to the first oscillatory angular movement of the grinding wheel. control means are provided to couple the translational movements, respectively;
In any working position of the cam, the control means
The grooved surface segments of the cam that are in contact with the working surface of the grinding wheel are aligned parallel to the axis of this wheel, so that the contact between the working surface of the grinding wheel and the grooved surface of the cam extends over said segment. It covers two types of manufacturing methods characterized by the effect of

Further, in order to achieve the above object, the present invention provides a grinding wheel having a cylindrical work surface of a constant circular cross section coaxial with the work spindle, and the work spindle moving the grindstone along a predetermined linear trajectory. Wheel
The chuck holder, which is slidably supported by the 5pindle and 5tock, is rotatably attached to the slide, and the work slide, on which the cam that is to be rotated is rotatably mounted, is connected to the work head around the vibration axis. The chuck holder converts the angular movement of the workpiece/slide around its own vibration axis into the angular vibrational movement of the workpiece/head, and the chuck holder converts the translational movement of the slide into the grindstone w.
Heel 5pindle 5tock translational movement,
By virtue of their mutual connection, in any working position of the cam, the grooved surface segments of the cam that are in contact with the working surface of the grinding wheel are aligned parallel to the axis of the grinding wheel, so that the working surface of the grinding wheel and the cam are aligned parallel to each other. It is also intended for a machine of the abovementioned type, characterized in that it is provided with control means such that the contact with the grooved surface of the segment extends over the entire segment.

The invention will now be described with reference to a preferred practical embodiment shown in the accompanying drawings, which are shown purely by way of example and without limitation.

1. A cylindrical grindstone that rotates around the axis χ. Grindstone 1 is
It has a cylindrical work surface 2 with a constant cross section and coaxial with the X axis. X
The axis can be moved by a translational movement in the direction indicated by arrow F. 3 is a cam having a working surface 4 made of a grooved surface, ie consisting of a number of straight segments. The cam 3 rotates around the Y axis, and its work surface 4 is
It has a variable shape with no breaks along the axis. The cam 3 is rotatable around a first axis (2) perpendicular to the X-axis of the grindstone 1.

The cam 3 is also pivotable around the Y axis and a second axis Z perpendicular to the Y axis. The slope indicated by A is the tangential surface of the cam 3 along the straight line segment 5 to the working surface 4. Reference numeral 7 indicates the generatrix of the cylindrical surface 2, which is arranged in a plane formed by the X-axis of the grindstone 1 and the direction of movement F of this axis. Figures 1 and 5
The generatrix 7 in the figures as well as in FIG. 6 is parallel to the segment 5 and aligned with this segment in the direction of movement F. Therefore, when the grindstone 1 is moved in the direction F, the generatrix 7 moves until it overlaps the segment 5. Denoted B is another tangential surface of the working surface 4 of the cam 3 along the straight line segment 6. Surface B rotates around the Y axis by an angle H with surface A as the center. In the second scrap, FIGS. 7 and 8, the cam 3 has rotated in the direction of the arrow H1 around the Y-axis by an angle H compared to the situation described above. In this state, B is therefore perpendicular to the plane formed by the axis X of the grindstone 1 and the moving direction F. In FIGS. 6, 9 and 10, cam 3
is rotated only angularly around axis Z in the direction indicated by arrow 1 compared to FIGS. 2, 7 and 8. With this rotation K, the segment 6 is in a position parallel to the plane formed by the axis X of the grindstone 1 and the translation direction F of this axis. In FIGS. 4, 11 and 12, the cam 3 is rotated by an angle in the direction indicated by the arrow L1 around the axis 2 compared to FIGS. 6, 9 and 10. With this rotation, the segment 6 is positioned parallel to the axis χ of the grindstone 1. In this state, the segments 6 are aligned with the axis χ of the grinding wheel 1 in the translational directions 24, 11, and 12.
Compared to its position in the figure, it has moved by an amount E in the direction indicated by arrow G perpendicular to the direction of translation F. With this second translation, the generatrix 7 of the grinding wheel 1 moves into the segment 6 in the translation direction F.
It will be aligned with. Therefore, when the grindstone 1 is moved in the direction F, the generatrix 7 bundles into the segments 6. Details of the manufacturing method according to FIGS. 1 to 13 are as follows. In FIGS. 1, 5 and 6, the grindstone 1 is translated along a first translation direction F and comes into contact with the segment 5. In FIGS. Subsequently, the cam 3 is rotated around its axis Y, and at the same time the position of the cam 3 is corrected by an angular movement of the cam around the axes Z and V, while the grinding wheel 1 is rotated in either direction in the translational direction F. and move to G. Such movement of the cam 3 and the grinding wheel 1 is controlled by conventional control means (not shown) such that the generatrix 7 of the grinding wheel contacts a particular segment of the grooved surface of the cam 3, whatever the relative position of the cam 3 on the grinding wheel 1. Numerically, the correct operating position of the stone 1 and cam 3 is obtained by the rotation H1K, L of the cam 3 and the translation FXG of the grinding wheel 1. Once the desired shape of the grooved work surface of the cam 3 is known, the corresponding value of the rotation angle of the cam 30 and the amount of translational interlock of the grindstone 1 can be determined for each tangential surface B. FIG. 14 shows a machine, indicated generally at 10, capable of implementing the above-described manufacturing method. The machine 10 has a base 11 on which a work head 12 is mounted pivotably about a fixed axis V. The workpiece head 12 is aligned with the axis Z perpendicular to the
The support plate 13 is supported so as to be able to rotate around the area. On the support plate 13, a workpiece slide 14, on which a cam shaft 15 is pivotably mounted, is slidable.・/Gift 15
is the ability to rotate around the axis X perpendicular to the axes Z and ■, and the electric @
It is rotated and driven by the rock 16.

A grinding wheel S is attached to the base 11 along the translational direction F.
pincjle 5tock i 7 is movably mounted 1, the direction of translation F is perpendicular to the axis of rotation V of the work head 12 1, wheel head 5p
The sliding movement of the indle 5tock 17 is effected by a dovetail guide member 18. Whetstone stand wheel 5pin
In dle 5tock 17, along the translation direction G,
A slide 19 is slidably mounted on the chuck receiver 3, and the translation direction 06 is perpendicular to the translation direction FK.

The slider 19 of the chuck receiver is equipped with a work spindle, and a grindstone 1 having a constant circular cross section and a cylindrical work surface coaxial with the rotation axis X of the grindstone 1 is coaxially attached to the work spindle. .

This rotating shaft or the rotating shaft of the work head 12■ and \11
- The driving surface '(not shown), which is perpendicular to the advancing directions F and G, gives the grinding wheel 1 a rotation of 11 degrees and a movement of '1+1. The operation of the machine 10 is as follows: 1 cam shift V-shift 15 is the control machine 1
6 rotates its periphery in the direction shown by arrow H1. At the same time, numerical control means (not shown) move the support plate 13 around the axis Z in the direction indicated by the arrow 1 and around the work head 127V in the direction indicated by the arrow L1. Rotate it. At the same time, by the action of a numerical control means (not shown), the grinding wheel head wbeel
5pindlestock-17 moves along the translational direction FK, and the chuck slide 19 also moves along the translational direction G. Along with this integral movement of the two, the grinding wheel 1 is always 1. Along one of the segments of the grooved surface of the cam 3, the adjacent cam pattern and manufacturing details of the shaft 15 may naturally be compared with those described and illustrated above without departing from the scope of the invention. however, it may be subject to significant changes. For example, in achieving the correct connection between the grinding wheel 1 and the cam 3, the above-mentioned motion is important not as an absolute motion but as a relative motion.
A part of the motion given to the cam can be given to the grindstone instead, or conversely, the translational force F@ of the grindstone can be given to the cam instead.

[Brief explanation of the drawing]

FIGS. 1, 2, 6, and 4 are a top view of FIG. 1, and FIG. 5 is a plan view of FIG. FIG. 6 is a side view taken along the arrow ■ in FIG. 5, which is parallel to the axis of the grinding wheel. Figures 47 and 8, Figures 9 and 10, Figures 11 and 12
The drawings are similar to FIGS. 5 and 6, and relate to 421 Sj, FIG. 6, and FIG. 4, respectively. FIG. 16 shows the grinding wheel and the cam in a further step of the manufacturing process according to the invention, parallel to the axis of the grinding wheel. Figure 2014 is a perspective view of a machine suitable for implementing the manufacturing method according to the present invention. Agent Ko Asamura Engraving of the drawing (no changes to the content) l: f6.11 g6.12r
+6.14 Procedural amendment (method) % formula % 1. Indication of case Patent Application No. 79234 of 1982, 3.
Relationship with the case of the person making the amendment Patent No. 3'1 Applicant's address Noon 3 Ran Raraizoto -Ra' death/7keyek/Ma IV -'7-/I light 4, agent 5, date of amendment order Iq Showa August 30, 1958 6, Number of inventions increased by amendment 7, Subject of amendment 8, Contents of amendment as attached.

Claims (10)

[Claims] (1) Prepare a grinding wheel that rotates around its axis and has an annular working surface, and arranges the annular working surface of the grinding wheel so that it contacts the grooved surface of the cam, and rotates the cam around its axis. gives an angular motion that vibrates around the vibration axis with a constant direction,
By giving the grinding wheel a translational motion that allows the work surface of the grinding wheel to move in a given linear direction, and by mutually coupling the rotational movement of the cam around the camshaft, the vibrational movement of the camshaft, and the translational movement of the grinding wheel, the grinding wheel can be machined. At each step, the working surface of the grinding wheel (1) is rotated at + (
The cam (3) is made of a cylinder with a constant circular cross section with the axis (X) as its axis; a second translational movement (G) along a given linear direction to the grinding wheel (1), and a second angular oscillatory movement (K1) of the axis (Y) of the cam (3) to this Control means are provided for respectively coupling a first angular oscillatory movement (Ll) of the shaft and a second translational movement (G) of the grinding wheel (1) with a first translational movement (l) of the grinding wheel; This control means ensures that, in any working position of the cam, the segments (5, 6) of the grooved surface (4) of the cam are in contact with the working surface (2) of the grinding wheel (1).
is located parallel to the axis (X) of the grinding wheel, so that the contact between the working surface of the grinding wheel and the grooved surface of the cam extends over the entire segment,
A manufacturing method for obtaining a grooved surface that forms the working surface of a cam by grinding the circumference of a straight vertical bar. (2) The clearing surfaces (4) of the cam (3) are formed by straight line segments each aligned with a corresponding surface passing through the longitudinal axis (Y) of the cam (3). The manufacturing method described in AK 1. (3) The first (v) and second (z) vibration axes around which the first (Ll) and second (K1) vibration movements of the rotation axis (Y) of the cam (3) occur, respectively, are A method according to claim 1 or 2, characterized in that they are perpendicular to each other. (4) The manufacturing method according to claim 3, characterized in that the first vibration axis (V) of the cam is perpendicular to the rotation axis of the grindstone (1). (5) The first, first (F), and second (G) translational movements of the grindstone (1) occur along a linear trajectory perpendicular to the rotation axis (X) of the grindstone (1). The manufacturing method described in claim 6 or 4. (6) The manufacturing method according to claim 5, characterized in that the first (F) and second (G) translational movements of the grindstone (1) occur along mutually perpendicular linear trajectories. . (7) A work head supported by a fixed structure of the machine so as to be rotatable around a vibrating axis with a constant direction, and a work slide having a cam attached thereto so as to be rotatable around its own vertical axis; The machine spindle, which can rotate around its own axis and has a grinding wheel fixed coaxially, is visible, and can be slid by the fixed structure of the machine so that the axis of rotation of the grinding wheel can move in translation along a predetermined linear trajectory. The grinding wheel head supported on the wheel 5pindle 5tock as well as the rotation of the cam around the longitudinal axis and the angular movement of the work head around the vibration axis 1. By mutually coupling the translational movements of the wheel 5pindle and 5tock, which supports the grinding wheel head and the grinding wheel, which is slidable and supports the work spindle, the work surface of the grindstone is moved into the groove of the cam.
A cylindrical work surface (2) with a constant circular cross section, in which a grinding wheel (1) is arranged coaxially with the work spindle, ), and this work spindle has a second translational movement (G
) Wheelspindle 5t
The chuck holder, which is slidably supported by the chuck (17), is slidably mounted on the slide (19), and the workpiece slide (14) on which the cam (3) to be obtained is pivotably mounted. is supported around the vibration axis (Z) by a support plate (13) connected to the work head (12), and the angular movement (K1) of the work slide (14) around its own vibration axis (z) is controlled by the workpiece. Head (12
) and the chuck, so that at any working position [I of the cam (3), the angular vibration motion (Ll) of the cam in contact with the work surface (2) of the grinding wheel (1) is coupled to the chuck. The grooved surface segments (5, 6) are in a parallel position to the axis (x) of the grinding wheel and are therefore aligned with the working surface (2) of the grinding wheel (1).
) and is provided with control means such that the contact with the grooved surface (4) of the cam (3) extends over said segment. A machine for obtaining, by grinding, a grooved surface that forms the work surface of. (8) The grooved working surface (4) of the cam (3) consists of straight line segments (3) each aligned with a corresponding surface passing through the longitudinal axis (Y) of the cam. Machines listed in Section 7. (9) The vibration axis (V) of the work head (12) and the vibration axis (l) of the support plate (13) are perpendicular to each other. Machines listed in section. (10) The machine according to claim 9, characterized in that the vibration axis (V) of the work head (12) is perpendicular to the rotation axis (X) of the grindstone axis wheel5pindlθ. ■ The two translational movements (F, G) of the grinding wheel (1) occur along a linear trajectory perpendicular to the rotation axis (X) of the grinding wheel shaft. Machines described in paragraph 10. 02 Two translational movements (F, G) of the grindstone (1). Machine according to claim 11, characterized in that the movement occurs along mutually perpendicular linear trajectories.