JPH0319833A - Grooving apparatus for tyre and grooving method thereof - Google Patents

Abstract

PURPOSE:To make the groove of a tyre product in a predetermined position even if any rolling occurs in the tyre by setting a cutter to the theoretic cutter cutting position, and calculating the correction moving rate of the cutter by a tyre rolling detecting signal, and then actuating the moving rate correcting mechanism of a horizontal moving table on the basis thereof. CONSTITUTION:In a standard actuation operating unit, a standard program is memorized therein, and according to this, the direction of a cutter 10 is set by making it coincide with the cutting direction by means of a motor 11, and then heated, wherein a tyre 3 is rotated, and further the standard rate moving mechanism of a coming up and down table driving mechanism 8 is driven so as to make a coming up and down table 7 descend in the direction of a Z axis, as a result, the cutter 10 cuts in to the tyre 3. In the case where the rolling of the tyre 3 occurs therein and the center of the tread deflects therefrom, the moving rate correcting mechanism of a horizontal moving table 5 is driven through a correction program in accordance with the detected value of a rolling detector 13, and the horizontal moving table 5 is moved in the direction of a Y axis in order to correct the cutter position; thus, the distance is kept at the position of the groove from the center of the tyre. By the process mentioned above, the desired grooving can be performed even if any rolling occurs in the tyre.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tire grooving device and a tire grooving method. More specifically, the present invention relates to a tire grooving device and a tire grooving method that can detect tire lateral vibration and correct the cutting position of a cutter accordingly.

[Prior Art] Conventionally, grooving for trial or small-volume tires, that is, the work of carving tread pattern grooves on vulcanized blank tires without a pattern, was usually done manually using a hand cutter. The work requires skill and long hours.

In view of the problems of the prior art, the present applicant has developed a structure in which the cutter support device already attached to the support stand and the tire support shaft move relative to each other in the lateral and vertical directions parallel to the tire support shaft. , an arm support shaft is provided protruding from the support base, a cutter holder is rotatably attached to the rotary arm attached to the shaft at right angles to the rotation axis, a cutter is attached to the tip of the cutter holder, and the cutter A tire grooving device has been proposed in which the main structure is such that the cutting position of the arm is aligned with the axis of the arm support shaft (Japanese Unexamined Patent Application Publications No. 83-54240 and No. 6).
1-177232).

The cutting position of the cutter here refers to a specific position of the cutter located at a certain distance (M> (including zero) from the lower end of the cutter holder (see FIG. 1).

The formation of tread pattern grooves on the brain tire by the grooving device is performed by setting the cutting position of the cutter at the cutting line (tread processing reference point) of the brain tire installed in the grooving device.

In this way, in the grooving device, the cutting position of the cutter is always maintained on the axis of the rotary arm support shaft and also on the cutting line of the brain tire, so the amount of movement of the support base and the rotary arm can be calculated. It is simple, it is easy to create a computer program, and the grooving is accurate.

However, if lateral vibration occurs on the side surface of the tire due to distortion of the tire itself or uneven tire support, the amount of movement is controlled according to a predetermined tread pattern shape by a set program while rotating the tire. Even when grooving is performed with a cutter that has been adjusted to the same size, the full position relative to the tread center will differ from tire to tire for tires of the same size and specifications, and when grooving multiple grooves on a single tire, the tread center (tire The positions of the grooves, which should be constant on the left and right sides (of the equator), were different from each other, causing quality problems such as making the product unstable and reducing its strength.

For this reason, as shown in Japanese Patent Application Laid-open No. 62-74835, for example, a non-contact type detection means for detecting the shape of the tread surface is provided, and the position of the cutter is controlled based on the detection result, and the position of the cutter is controlled. A method has been proposed in which the amount of rubber removed from the rubber is constant.

[Problems to be Solved by the Invention] However, in such a tire grooving device, it is necessary to have a large-scale frame in order to provide a means for detecting the grooving shape, and it is necessary to have a large-scale frame to provide a means for detecting the grooving shape, and it is necessary to provide a means for detecting the shape of the grooving. Since the cutter is kept constant, it is not possible to move the cutter in response to the lateral runout of the tire, and there are problems such as the inability to follow the lateral runout and keep the groove position relative to the tread center at a desired constant position. be.

The present invention has been made in view of the problems of the prior art, and it is an object of the present invention to provide a tire grooving device and a tire grooving method that can perform desired grooving even if the tire has lateral runout.

[Means for Solving the Problems] A tire grooving device of the present invention comprises: (a tire support device that rotatably supports a tire; a cutter support device that is rotatable; and (c) the cutter support device). a rotating arm held at one tip; c) a lifting platform that can be raised and lowered and having an arm support shaft and a reference amount moving mechanism that rotatably hold the rotating arm; and (e) holding the lifting table. and a horizontal moving platform having a reference amount moving mechanism section and a moving amount correction mechanism section that are movable at least in a lateral direction parallel to the tire support axis of the tire support device, and a target tire lateral runout detection means (( 1) comprising a control means, the control means calculates the corrected movement amount of the cutter based on the signal from the standard operation operation unit that sets the cutter to a theoretical cutter cutting position and the tire lateral runout detection means; The present invention is characterized by comprising a correction operation operation unit that operates a movement amount correction mechanism provided on the horizontal moving table based on the correction movement amount calculation value.

Further, the tire grooving method of the present invention is a method of grooving a tire according to a standard program, comprising: (a) detecting tire lateral runout; and Cb) correcting the grooving position of the cutter based on the detected lateral runout value. It is characterized by the following.

Preferably, the grooving position of the cutter is corrected using a correction program provided separately from the reference program.

[Function] The tire grooving device of the present invention includes a horizontal moving table that moves a cutter having a reference amount moving mechanism section and a moving amount correction mechanism section in parallel to the tire support shaft, and a reference amount moving mechanism section. Since it has a lifting table for moving the cutter in the vertical direction, a detection means for detecting lateral vibration of the tire, and a means for controlling each of the moving parts, the horizontal movement table and the lifting table can be moved at a reference movement amount. At the same time, the cutter can be controlled to the optimum position by making the correction movement amount according to the detection value of the detection means follow the reference movement amount.

Further, according to the tire grooving method of the present invention, the reference movement amount of the horizontal moving platform and the lifting platform is controlled by the reference program, and the lateral deviation of the tire is detected and the lateral deviation correction movement amount is determined according to the detected value. The cutter can be controlled to the optimum position by making it follow the reference movement amount.

[Examples] Hereinafter, the present invention will be explained in detail based on Examples, but the present invention is not limited only to these Examples.

1 and 2 are a side view and a front view of an embodiment of the tire grooving device of the present invention. 3 is a main functional block diagram of the tire grooving device shown in FIGS. 1 and 2, FIG. 4 is a block diagram showing the electrical configuration of the main parts of the tire grooving device shown in FIGS. 1 and 2, and FIG. The figure is a flowchart showing the grooving operation, and FIG. 6 is a detailed flowchart of the grooving processing section of FIG.

In the grooving device shown in FIGS. 1 and 2,
(1) is a bed, (2) is a tire support device provided on the bed (1), and a tire (3) is mounted on a tire support shaft (21) and rotated by a motor. (4) is a base that can be moved along the guide bar (42) on the rail on the bed (1) in the X-axis direction perpendicular to the axis of the tire support shaft (21) by a motor (not shown). be. Note that the base (4) does not need to be moved if the distance from the tire support shaft (2rJ) is set to a predetermined value.

(S is a horizontal moving table that moves on the base (4) along the rail (4l) in the Y-axis direction parallel to the tire support shaft (21), (6) is a horizontal moving table driving device (see Fig. 9) As shown in the figure, it consists of a base amount movement mechanism section and a movement amount correction mechanism section.

(''7) is an elevating table that is moved on the horizontal moving table (5) along the guide shaft (52) in the Z-axis direction perpendicular to the bed (1) by a reference amount moving mechanism.

(7l) is a rotating arm, which is attached to an arm support shaft (72) protruding from the lifting table (7) in the X-axis direction, and is rotated by the arm support shaft (72)
) is rotated in the direction of arrow A in FIG. 2 about the axis (73).

(9) is a cutter support device installed vertically from the rotating arm (7t) toward the axis (73), and the cutter support frame (92) is attached to the column (91) supported by the rotating arm (71>). ) and is removably attached to a cutter holder (94) attached via an insulator (93) so that the cutting position P of the cutter coincides with the axis (73), not shown. The cutter is heated by the power supply device.01) is the cutter support device (9)
A motor that rotates the cutter in the direction of arrow C to change the direction of the cutter.
(121 is an actuator that independently moves the cutter support device (9) up and down in order to align the cutting position P of the cutter M with the axis line (73).

Note that instead of the actuator Oz, the position at which the cutter support device (9) is attached to the support column <91> may be adjusted so that the cutting position P of the cutter 00) coincides with the axis (73).

(self) is a lateral runout detector that detects the lateral runout of the tire by facing the buttress on the side surface of the tire at a predetermined distance m. The sensor is an optical reflection type displacement sensor or the like which is adjusted, and the detected value is manually applied to a control device (not shown) to drive the movement amount correction mechanism section of the horizontal movement table driving device (6).

Next, grooving processing by the tire grooving apparatus configured as described above will be explained based on the block diagram shown in FIGS. 3 and 4 and the flowchart shown in FIGS. 5 and 6.

When the operating power is turned on, the origin position of each moving mechanism section is set according to a grooving pattern by a command from a reference operation operation section (see FIG. 4) of the control means.

A tire (with pattern grooves formed on the tire support shaft (21)
3) and install the lateral runout detector rod facing the side of the tire buttress.

A reference program for controlling the operation of the cutter in a range where the tire does not run out is stored in the memory of the reference operation operation unit. According to this standard program, the motor 01) sets the direction of the cutter (goods) according to the cutting direction, the cutter (goods) is heated by power supply, the tire (3) is rotated by the motor in the direction of arrow B, and then The reference amount movement mechanism section of the lifting table drive device (8) of the lifting table (7) is driven to lower the lifting table (7) in two axial directions,
The heated cutter M is made to cut into the tire (3) (see Fig. 7).

As shown in Fig. 8, the deviation of the tread center line from a to b due to the lateral runout E2 of the tire (3) is corrected by a correction program on the horizontal moving platform according to the detected value by the lateral runout detector 0. The movement amount correction mechanism (5) is driven to move the horizontal moving table (5) in the Y-axis direction to correct the cutter position as shown by the two-dot chain line, and adjust the distance L of the groove position from the tire center. let it hold.

Next, the configurations of the reference amount moving mechanism sections of the horizontal moving table (5) and the lifting table (7) and the movement amount correction mechanism section of the horizontal moving table (5) will be explained.

FIG. 9 is a configuration diagram of an embodiment of the horizontal moving table driving device (6). In the embodiment shown in FIG. 9, the reference amount moving mechanism includes a frame member (5l) slidably disposed astride a pair of rails (41) installed on a base (4). , a female threaded body (65) having a driven gear (68) rotatably held via a bearing, a ball screw shaft (62) screwed into the female threaded body (65), and the ball screw. A drive motor (
6I) and a support bearing (609) provided on the base (4) that supports the other end of the ball screw shaft (62).

When the drive motor (6l) is driven according to the standard program, the ball screw shaft (62) rotates, and the horizontal moving table (5) moves in the predetermined ffiY-axis direction accordingly.

Further, the movement amount capturing mechanism section includes a support boss (51) in which a plurality of spline grooves are formed in the axial direction and has a drive gear (67) rotatably held on the frame member (51) via a bearing.
6B), a spline shaft (64) slidably engaged with the support boss, a correction motor <63) connected at one end of the spline shaft (64), and a spline shaft (64) of the spline shaft (64). It consists of a support bearing (810) provided on a base (4) that supports the other end.Here, the drive gear (67) meshes with a driven gear (68).

When the correction motor (B3) is driven in accordance with the correction program in this state, the spline shaft <64> rotates and rotates the drive gear (67). As the drive gear (67) rotates, the driven gear (68) rotates, thereby moving the horizontal moving table (5).
) is corrected by a predetermined amount. Spline shaft (64)
Since it is slidably engaged with the support boss (66), it does not interfere with the movement of the horizontal moving table (5) according to the standard program.

FIG. 10 and FIG. 11 are a front view and an explanatory view of the main part structure of another embodiment of the horizontal moving table driving device (6) of the present invention.

In the embodiment shown in FIGS. 10 to 11, the reference amount moving mechanism unit includes a drive motor (63) disposed on the base (4) and a ball screw shaft (62) coupled to the motor (63). , a bearing member (805) disposed on a base (4) that rotatably holds the vicinity of both ends of the ball screw shaft (62>), and a guide member (69) disposed on the base (4). and a female threaded body (803) that is screwed together with the ball screw shaft (62), and an intermediate support base (Ei02) having a through hole that is slidably mated with the guide shaft (601) of the guide member (B9>).
It consists of.

When the drive motor (6l) is driven according to the standard program, the horizontal movement table (S) connected to the intermediate support table (602) via the movement amount correction mechanism also moves a predetermined amount in the Y-axis direction. As a result, the cutter is also moved by a predetermined amount in the Y-axis direction.

The movement amount correction mechanism unit includes a correction motor (63) disposed on an intermediate support (602), a ball screw shaft (B4) coupled to the correction motor (63), and a ball screw shaft (64). Intermediate support stand (802) that is rotatably held
It consists of a bearing member (605) disposed on the ball screw shaft (64), and an internal threaded body (604) disposed on the bottom surface of the horizontal movement platform which is threadedly engaged with the ball screw shaft (64).

In this state, when the correction motor (63) is driven by the correction roller ram, the ball screw shaft (64) rotates by a predetermined amount, and the horizontal moving table (5) is moved by a predetermined amount in the Y-axis direction.

In addition, in the embodiment shown in FIGS. 10 to 11, the female screw body (6
03) and (604) are two each, but
The number of female screw bodies does not need to be limited to two, and may be one as long as the desired movement can be achieved.

In the above explanation, a processing procedure using feedback control based on the lateral vibration detection value has been described, but if there is a deviation between the cutting position of the cutter and the lateral vibration detection position, an error may occur. In order to deal with such a situation, the amount of lateral runout of the tire may be stored in the correction operation operating section in advance, and the cutter may be corrected and moved based on the stored value.

The operation in this case will be explained in detail below based on FIGS. 12 to 14.

First, turn on the power and receive commands from the control means. Set the origin of the movement mechanism, attach the tire (3) on which pattern grooves are to be machined to the tire support device ('2J), mark a specific position on the tread surface as the origin mark, and perform lateral runout detection W ( 13 are respectively placed facing the tire buttresses.

The tire (3) is rotated at a low speed, the marking position is used as the origin for grooving processing, the tire (3) is rotated once from this position, and the detected value of the lateral runout detector 0 during this period is stored in the memory together with the rotation angle position. let

When the automatic operation button is pressed after the lateral runout data has been stored in the memory, the standard program automatically adjusts the tire support shaft (
21) rotates, the cutter ■■■ is controlled by each reference amount movement mechanism and descends into contact with the tire at a predetermined position. During this time, the cutter is heated and changes the rotation angle from the origin in a constant trajectory. Perform predetermined grooving according to the position.

At the same time, lateral runout data is retrieved from the memory of the correction operation operation unit according to the rotational angular position of the tire, and the correction amount by the correction program is calculated by the correction program control command from the standard program, and the correction amount is calculated for each rotational position on the buttress circumference. Accordingly, the lateral vibration data is retrieved from the memory of the correction operation operation section, and the correction motor (63) of the horizontal movement table drive device (6) is driven by the lateral vibration correction amount calculated by the correction program, and the ball screw shaft (64) is ) is rotated, and the cutter (rotation) is moved horizontally in addition to the amount of movement according to the standard program (if the captured value is negative, the difference is subtracted).

[Effects of the Invention] As described above, the present invention includes a horizontal moving table that moves the cutter parallel to the tire support shaft, a lifting table that moves the cutter in the vertical direction, and a detector that detects the lateral vibration of the tire. The horizontal movement table and the lifting table are controlled by a reference movement amount, and the correction movement amount according to the detection value of the detector is made to follow the reference movement amount to correct the cutter movement amount. Even if the tire experiences lateral runout, the groove position relative to the tread center of each product tire can be kept at a predetermined position.Moreover, the reference movement amount is always controlled at the value set by the reference program, and the correction movement is performed based on the runout detection value. Since the amount can be followed and corrected by a separate correction program, the structure of the program is simple, the apparatus can be made compact, and uniform grooving can be performed.

[Brief explanation of drawings]

1-2 are a side view and a front view of one embodiment of the tire grooving device of the present invention, FIG. 3 is a main functional block diagram of the tire grooving device shown in FIGS. 1 and 2 are block diagrams showing the electrical configuration of the main parts of the tire grooving device, FIG. 5 is a flowchart of one embodiment of the grooving operation, and FIG. Fig. 7 is an explanatory diagram showing the grooving state, Fig. 8 is an explanatory diagram showing the state of tire lateral vibration correction, Fig. 9 and Figs. A flowchart of another embodiment of the grooving operation, FIG. 13 is a detailed flowchart of the detection step, and FIG. 14 is a detailed flowchart of the grooving processing section. (Main symbols in the drawing) (2): Tire support device (3): Two tires (4) Base (5): Horizontal moving platform (6): Horizontal moving platform drive device (Sword: Lifting platform Q3. Lateral vibration detection Figure 2

Claims (1)

[Claims] 1 (a) a tire support device that rotatably supports a tire; (b) a rotatable cutter support device; and (c) a rotary device that holds the cutter support device at one end. an arm; (d) a lifting platform that can be raised and lowered and having an arm support shaft and a reference amount moving mechanism that rotatably hold the rotating arm; and (e) a lifting table that holds the lifting table and at least the tire support device. (f) a tire lateral runout detection means; and (g) a control means. The control means calculates the corrected movement amount of the cutter based on the signal from the reference operation operation section that sets the cutter at the theoretical cutter cutting position and the tire lateral runout detection means, and also calculates the corrected movement amount of the cutter based on the corrected movement amount calculation value. A tire grooving device comprising: a correction operation operation section that operates a movement amount correction mechanism section provided on the horizontal moving table. 2. A method for grooving a tire according to a standard program, comprising: (a) a step of detecting tire lateral runout; and (b) a step of correcting a grooving position of a cutter based on the detected lateral runout value. A tire grooving method featuring: 3. The grooving method according to claim 2, wherein the correction of the grooving position of the cutter is performed by a correction program provided separately from a reference program.