JP5564583B2 - How to correct a straight shaving cutter - Google Patents

Description

  The present invention relates to a straight shaving cutter, and more particularly to a method for correcting a straight shaving cutter.

  Gears are basic components that transmit power and motion, have advantages such as high transmission efficiency, long service life, and high safety, and are already indispensable transmission components for many mechanical products.

  Since gear design and manufacturing levels directly affect the performance and mass of machine products and achieve high quality requirements, there are generally two types of gear tooth surface modification: grinding and shaving. However, although grinding has a relatively high accuracy, it takes a considerable amount of time in the grinding process and can generate a lot of oil fog abrasive particles, etc., so it is relatively incompatible with environmental protection and economy. Thus, in general, many of the medium and high precision gear corrections use shaving techniques, and the shaving cutter has a high overuse, tool gear correction time is much less than grinding and is relatively economical.

  Patent Document 1 discloses an equipment for grinding a tooth side surface of a kind of shaving cutter, which grinds a tooth side surface of a shaving cutter by a rolling-generation method. However, the above-described equipment requires an additional grinding machine and a shaving cutter removal / attachment step during the grinding process.

  Thus, in Patent Document 2, another kind of grinding method for a shaving cutter is submitted, which provides a round shaving cutter grinding machine, which comprises an equipment stand, equipment column, A roller carriage that can reciprocate linearly on the instrument column, and a workpiece spindle that is pivotably disposed on the roller carriage, the axis of rotation of which is relative to the linear movement of the roller carriage A workpiece spindle that is at right angles, and drive means for rotational and linear movement of the roller carriage, the drive means being in the ratio required to create the involute tooth profile. , Grinding wheel that can be advanced in the direction of the rotation axis, and rotating and advancing the grinding wheel And a fit of the drive means. The grinding wheel utilizes the tangential engagement of the tooth tip of the round shaving cutter machined with the conical second working area, thereby grinding the tooth tip in an uneven manner and necessary It is to obtain a diameter of the tip circle diameter and thereby reduce the tip circle diameter of the machined round shaving cutter to an appropriate size.

  However, after the shaving cutter has shaved the tooth surface of the gear too many times, the cutting edge in contact with the tooth surface gradually wears. Accuracy can be reduced. For this reason, it is necessary to correct the shaving cutter.

  Furthermore, a known 5-axis shaving cutter grinder, for example, a greasing machine of model number Gleason-Hurth SRS 410 produced by the US company Gleason, is a dry process when the shaving cutter is modified. And because it is a grinder designed for such special grinding requirements of a shaving cutter, it increases the manufacturer's equipment costs and therefore there is room for improvement.

U.S. Pat. No. 4,831,788 Japanese Patent No. 45524159

  The main object of the present invention is that after the shaving cutter has shaved the tooth surface of the multi-order gear, the cutting edge that comes into contact with the tooth surface gradually wears, and therefore the tooth profile is corrected precisely for the gear. The problem of reduced accuracy and the processing speed of the well-known 5-axis shaving cutter grinding machine is slow when it is corrected to the shaving cutter, so the processing speed is slow, and this is the special grinding of the shaving cutter The grinding machine is designed to meet the requirements, so that it solves the problem of increasing the manufacturer's equipment cost.

The present invention provides a method for correcting a straight shaving cutter, which in one embodiment uses a gear forming grinder (1) that includes a tool sheet (10) and a first axial direction (Z ) And a work sheet (20) that moves relative to the tool sheet (10). The tool sheet (10) drives a machining axis (11) that drives and rotates the grind tool (40). The worksheet (20) includes a work shaft (21) that rotates about the first axial direction (Z) as a rotation axis.
A straight shaving cutter (30) is provided, and the straight shaving cutter (30) includes a plurality of spiral teeth (31) arranged to be spaced apart from each other, and the workpiece that the spiral teeth (31) includes Define the side (311)
Positioning the straight shaving cutter (30) on the workpiece shaft (21) and bringing the processed side (311) of the straight shaving cutter (30) into contact with the grinding tool (40);
The grinding tool (40) is rotated, and the straight shaving cutter (30) is rotated about the first axial direction (Z) according to a variable rotation amount, and the first shaving cutter (30) is rotated according to a first variable movement amount. A second axial direction (Y) perpendicular to the first axial direction (Z) and the machining axis (11) according to the second variable movement amount is moved along the axial direction (Z). ), Causing the grind tool (40) to perform a spiral motion on the straight shaving cutter (30) to execute a correction operation on the workpiece side (311),
Including the above steps, of which the value of the ratio between the variable rotation amount and the first variable movement amount is calculated based on the tooth profile parameter of the straight shaving cutter (30) during the correction operation. The ratio value between the second variable moving amount and the first variable moving amount is a second variable b obtained by calculation based on the tooth profile parameter of the straight shaving cutter (30). To do.
The present invention also includes, in one embodiment, the cut thickness (313) where the tooth profile parameter is located on the processed side (311).
The present invention also includes, in one embodiment, the processing side (311) includes a plurality of cutting blades (312) spaced apart from each other along the first axial direction (Z). 312) has an uncorrected thickness (314) that decreases inwardly from the outside before the correction operation.
The present invention also includes, in one embodiment, the processing side (311) includes a plurality of cutting blades (312) spaced apart from each other along the first axial direction (Z). 312) has a modified thickness (315) that is obtained by removing the cut thickness (313) from the unmodified thickness (314) after the modifying operation and gradually decreasing inward from the outside.
In another embodiment of the present invention, the processing axis (11) rotates about a third axis direction (X) perpendicular to the first axis direction (Z) as a rotation axis, and the tool sheet (10) further includes The upright moving part (12), the upright moving part (12) being connected to the machining axis (11) and the machining axis (11) moving along the third axial direction (X). To be served.
The present invention also provides that in one embodiment, the tool seat (10) further includes a swinging portion (13) connected to the upright moving portion (12), and the swinging portion (13) The moving part (12) is provided to swing about the second axis direction (Y) as a swing axis.
In one embodiment of the present invention, the tool sheet (10) further includes a horizontal moving part (14) connected to the swinging part (13), and the horizontal moving part (14) is the swinging part. The part (13) is provided to move along the second axial direction (Y).

Thus, according to the present invention, the straight shaving cutter rotates around the first axial direction (Z) with the variable rotation amount, and at the same time along the first axial direction (Z) with the first variable movement amount. The grind tool moves and moves along the second axial direction (Y) with the second variable movement amount, thereby having at least the following excellent points.
1. By causing the grind tool to perform a spiral motion on the straight shaving cutter and to execute the correction operation on the processed side, the spiral teeth of the straight shaving cutter have a tooth shape after correction and the tooth shape is restored. It can be applied to shaving work.
2. The variable rotation amount, the first variable movement amount, and the second variable movement amount can be adjusted based on the tooth profile parameters of the straight shaving cutter, and the processing amount of the grinding tool with respect to the straight shaving cutter is the straight amount. Since the grinding tool is applied uniformly depending on the wear condition of the shaving cutter and the grinding tool uses a wet grinding, the grinding speed can be increased.
3. Since the present invention uses an existing gear forming grinder, the related manufacturers do not need to pay extra equipment costs.
4). The present invention is not only used for the modification of old straight shaving cutters but is also applicable to the production grinding of new straight shaving cutters.

It is a structure display figure of the Example of this invention. It is the correction work display figure 1 of the Example of this invention. It is correction | amendment work display figure 2 of the Example of this invention. It is a display figure before correction | amendment of the to-be-processed side of the Example of this invention. It is a display figure before the correction | amendment after the process of the Example of this invention. It is a 1st variable display figure of the Example of this invention. It is a 2nd variable display figure of the Example of this invention.

  To achieve the above object, the present invention provides a kind of straight shaving cutter correction method, which uses a gear forming grinder, which includes a tool sheet and a worksheet.

  The tool sheet has a machining axis for driving and rotating a grind tool, the worksheet moves along the first axis direction and with respect to the tool sheet, and the worksheet rotates in the first axis direction. It has a workpiece axis that rotates as an axis.

The correction method is as follows:
Providing a straight shaving cutter, the straight shaving cutter comprising a plurality of spaced apart helical teeth;
Defining a workpiece side of the helical tooth;
Positioning the straight shaving cutter on the workpiece axis and contacting the processed side of the straight shaving cutter with the grinding tool;
The grinding tool is rotated, and the straight shaving cutter is rotated around the first axis direction according to a variable rotation amount, and is moved along the first axis direction according to a first variable movement amount, The grinding tool is moved along the first axis direction and the second axis direction perpendicular to the machining axis according to the second variable movement amount, and the grinding tool is caused to perform a spiral motion with respect to the straight shaving cutter. A step for executing correction work on the processing side;
The above steps are included.

  Among these, during the correction work, the value of the ratio between the variable rotation amount and the first variable movement amount is the first variable calculated based on the tooth profile parameter of the straight shaving cutter, and the second variable movement amount and the first variable movement amount The ratio value of the first variable movement amount is a second variable obtained by calculation based on the tooth profile parameter of the straight shaving cutter.

  In order to describe in detail the technical contents, structural features, and objects to be achieved of the present invention, examples will be described below in combination with drawings.

  Please refer to FIG. It is a structural display diagram of an embodiment of the present invention. The present invention is a kind of straight shaving cutter correction method, which uses a gear forming grinder (1). The gear forming grinder (1) includes a worksheet (20) and a tool sheet (10).

  The worksheet (20) moves along the first axis direction (Z) and along the tool sheet (10), and the workpiece axis (21) rotates about the first axis direction (Z) as a rotation axis. It has.

  The tool sheet (10) includes a machining shaft (11), an upright moving part (12), a swinging part (13), and a horizontal moving part (14).

  The machining axis (11) rotates about a third axis direction (X) perpendicular to the first axis direction (Z) as a rotation axis, and rotates by driving a grinding tool (40).

  The grind tool (40) is disc-shaped, and a radially extended grind edge (42) (shown in FIG. 2A) projects on the outer ring surface (41) (shown in FIG. 2A), The grinding edge (42) has a symmetrical cone shape, and the grinding tool (40) may be a grinder, but is not limited thereto.

  The upright moving part (12) is connected to the machining axis (11), and is provided for the machining axis (11) to move along the third axial direction (X). ) Is connected to the upright moving part (12), and the upright moving part (12) is perpendicular to the first axial direction (Z) and the third axial direction (X) in the second axial direction (Y). Is used to swing about the swing axis. The horizontal moving part (14) is connected to the swing part (13), and is provided for the swing part (13) to move along the second axial direction (Y).

  Please refer to FIGS. 2A, 2B, 3A, and 3B together. FIG. 2A and FIG. 2B are respectively a correction work display diagram 1 and a display diagram 2 of the embodiment of the present invention. FIG. 3A and FIG. 3B are display diagrams before and after modification on the workpiece side according to the embodiment of the present invention, respectively. The correction method includes the following steps.

Step 1:
A straight shaving cutter (30) is provided. The straight shaving cutter (30) includes a front end surface (32), a rear end surface (33), a circumferential surface (34) and a plurality of helical teeth (31), and the rear end surface (33) is the front end surface (32). The circumferential surface (34) is connected to the front end surface (32) and the rear end surface (33) and is located between the front end surface (32) and the rear end surface (33), The two helical teeth (31) are separated from each other by a gap (35), and are installed on the circumferential surface (34), respectively, from the portion close to the rear end surface (33) in the first axial direction (Z ) Along the front end face (32).

Step 2:
A processing side (311) and a cutting thickness (313) included in the helical tooth (31) are defined. The workpiece side (311) includes a plurality of cutting blades (312) facing the gap (35) and projecting toward the gap (35), and the cutting blade (312) is the first shaft. The cutting blades (312) spaced apart along the direction (Z) and approaching the front end face (32) and the rear end face (33) have a relatively thick thickness, from the outside inward An unmodified thickness (314) is formed that decreases. The to-be-cut thickness (313) refers to the thickness to be removed by correction in the unmodified thickness (314) in the cutting blade (312) on the to-be-processed side (311).

Step 3:
The straight shaving cutter (30) is positioned on the work shaft (21), the straight shaving cutter (30) is rotated about the first axis direction (Z) as a rotation axis, and the grinding tool (40) is The tool sheet (10) is moved to the contacted position by the horizontal moving part (14), the swinging part (13), and the upright moving part (12).
The straight shaving cutter (30) moves from the worksheet (20) to the contacted position along the first axial direction (Z).
Further, the grind tool (40) is moved relative to the straight shaving cutter (30), and the grind edge (42) of the grind tool (40) is moved from the front end face (32) of the straight shaving cutter (30). The gap (35) is entered and brought into contact with the processed side (311).

Step 4:
The work shaft (21) controls the straight shaving cutter (30) to rotate around the first axial direction (Z) with a variable amount of rotation, and at the same time, the straight shaving cutter from the work sheet (20). (30) is moved along the first axial direction (Z) by the first variable movement amount.
The machining axis (11) drives and rotates the grind tool (40), and the grind tool (40) is driven by the horizontal movement unit (14) to move the grind tool (40) with a second variable movement amount in the second axial direction. It is moved along (Y), and the grinding tool (40) is spirally moved with respect to the straight shaving cutter (30), thereby executing a correction operation on the processing side (311).
The grinding tool (40) is ground with respect to the cutting blade (312) on the processing side (311), and the cutting thickness (313) is calculated from the unmodified thickness (314) of the cutting blade (312). ) To form a modified thickness (315). The modified thickness (315) decreases from the outside inward and is smaller than the unmodified thickness (314).

  In addition, please refer to FIGS. 3A and 3B. It should be explained here that, as shown in FIG. 3A, before the correction operation, the cutting blade (311) on the workpiece side (311) is worn by each cutting blade due to long-time wear. The connection portion between the both sides (316) and the upper side (317) of (312) is already worn and becomes a smooth curve. For this reason, if the tooth profile correction operation is performed on the gear, the accuracy of the gear decreases, which may affect the quality and performance of the gear.

  For this reason, the tooth profile parameter of the straight shaving cutter (30) is set before the correction work. The tooth profile parameter may include, but is not limited to, the cut thickness (313) described above.

  During the correction operation, the work shaft (21), the work sheet (20), and the horizontal movement unit (14) are respectively connected to the straight shaving cutter (30) and the grind tool (40) with the set tooth profile parameters. 4A, by appropriately adjusting the variable rotation amount, the first variable movement amount, and the second variable movement amount, as shown in FIG. 4A, between the variable rotation amount and the first variable movement amount. The ratio value between the second variable movement amount and the first variable movement amount is defined as the second variable b, as shown in FIG. 4B. be able to.

  Here, the present invention is not limited to this, and a case where the first variable a and the second variable b express a cubic curve having a nonlinear relationship will be described as an example. The contact position between the grinding tool (40) and the grinding tool (40) can be adjusted, and the grinding tool (40) can also adjust the contact angle with respect to the straight shaving cutter (30) by the swinging portion (13). The straight shaving cutter (30) can be corrected, and the cutting thickness (313) of the cutting blade (312) is removed to form the set corrected thickness (315), as shown in FIG. As shown, a cutting edge (318) is provided at the connecting portion of the upper side (317) and the side side (316) of the cutting blade (312).

  In summary, the present invention rotates the straight shaving cutter around the first axial direction with the variable rotation amount, and at the same time, along the first axial direction (Z) with the first variable movement amount. The grinding tool is moved along the second axial direction (Y) with the second variable movement amount, and the grinding tool is caused to perform a spiral motion with respect to the straight shaving cutter, and the workpiece The correction operation is performed on the side, and the spiral tooth of the straight shaving cutter is applied again to the shaving operation with the corrected tooth profile.

  Further, the variable rotation amount, the first variable movement amount, and the second variable movement amount can be adjusted by the tooth profile parameter of the straight shaving cutter, and the machining amount of the grind tool with respect to the straight shaving cutter can be adjusted to the straight shaving cutter. It can be adjusted according to the wear condition of the shaving cutter so that it can be applied uniformly, the correction thickness error can be reduced, and the grinding tool can use wet grinding to increase the grinding speed.

  In addition, the present invention uses an existing gear forming grinder, and it is not necessary for related manufacturers to spend extra equipment costs. It can be used to modify old straight shaving cutters and can be applied to production grinding of new straight shaving cutters. is there.

Therefore, the present invention is extremely inventive and meets the requirements of the patent and is therefore a patent application.
The above description is only an example of the present invention, and does not limit the scope of the present invention. Any equivalent changes and modifications that can be made based on the scope of the claims of the present invention are all described in the present invention. Shall belong to the scope covered by the rights.

(1) Gear forming grinder (10) Tool sheet (11) Processing shaft (12) Upright moving part (13) Oscillating part (14) Horizontal moving part (20) Worksheet (21) Work shaft (30) Straight shaving cutter (31) Spiral tooth (311) Processing side (312) Cutting blade (313) Cutting thickness (314) Unmodified thickness (315) Modified thickness (316) Side edge (317) Upper edge (318) Cutting edge (32) Front end surface (33) Rear end surface (34) Circumferential surface (35) Gap (40) Grind tool (41) Outer ring surface (42) Grind edge (Z) First axial direction (Y) Second axis Direction (X) Third axis direction a First variable b Second variable

Claims (7)

In a method for correcting a straight shaving cutter, a gear forming grinder (1) is used, the gear forming grinder (1) being along the tool sheet (10) and the first axial direction (z) and the tool sheet (10). The tool sheet (10) includes a machining axis (11) that swings and rotates the grind tool (40), and the worksheet (20) A work axis (21) that rotates about the first axis direction (z) as a rotation axis, and the correction method includes:
Providing a straight shaving cutter (30), the straight shaving cutter (30) comprising a plurality of spaced apart helical teeth (31);
Define the processed side (311) of the helical tooth (31),
Positioning the straight shaving cutter (30) on the workpiece shaft (21) and bringing the processed side (311) of the straight shaving cutter (30) into contact with the grinding tool (40);
The grinding tool (40) is rotated, and the straight shaving cutter (30) is rotated about the first axial direction (z) according to a variable rotation amount, and the first shaving cutter (30) is rotated according to a first variable movement amount. A second axial direction (Y) perpendicular to the first axial direction (z) and the machining axis (11), respectively, according to a second variable movement amount, and the grinding tool (40) is moved along the axial direction (z). ), Causing the grind tool (40) to perform a spiral motion on the straight shaving cutter (30) to execute a correction operation on the workpiece side (311),
Including the above steps, of which the value of the ratio between the variable rotation amount and the first variable movement amount is calculated based on the tooth profile parameter of the straight shaving cutter (30) during the correction operation. The ratio value between the second variable moving amount and the first variable moving amount is a second variable b obtained by calculation based on the tooth profile parameter of the straight shaving cutter (30). To correct a straight shaving cutter.   The straight shaving cutter correction method according to claim 1, wherein the tooth profile parameter includes a thickness (313) to be cut located on the workpiece side (311). . 3. The straight shaving cutter correction method according to claim 2, wherein a plurality of cutting blades (312) spaced apart from each other along the first axial direction (z) are provided between both ends of the processed side (311). The plurality of cutting blades (312) have an uncorrected thickness (314) that gradually decreases from both ends of the processed side (311) to the center before the correction operation . How to fix. 4. The straight shaving cutter correction method according to claim 3, wherein a plurality of the cutting blades (312) are removed from the uncorrected thickness (314) after the thickness to be cut (313) after the correction operation. 5. A method for correcting a straight shaving cutter, characterized by having a correction thickness (315) that gradually decreases from both ends of the processed side (311) to the center .   The straight shaving cutter correction method according to claim 1, wherein the processing axis (11) rotates about a third axis direction (x) perpendicular to the first axis direction (z) as a rotation axis, and the tool sheet (10) further includes an upright moving part (12), the upright moving part (12) is connected to the machining axis (11), and the machining axis (11) is in the third axial direction (x). A method for correcting a straight shaving cutter, characterized in that it is provided to move along.   The straight shaving cutter correction method according to claim 5, wherein the tool sheet (10) further includes a swinging part (13) connected to the upright moving part (12), and the swinging part (13). ) Is a method for correcting a straight shaving cutter, characterized in that the upright moving part (12) is used for swinging with the second axis direction (Y) as a swing axis.   The straight shaving cutter correction method according to claim 6, wherein the tool sheet (10) further includes a horizontal moving part (14) connected to the swinging part (13), and the horizontal moving part (14). ) Is a method for correcting a straight shaving cutter, wherein the swinging portion (13) is provided to move along the second axial direction (Y).

Images