JPS5939267B2 - Grindstone forming device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a grindstone forming device used for forming the outer peripheral edge of a grindstone attached to a grinding machine into a predetermined shape. It is an object of the present invention to provide a grindstone forming device which can cut the outer peripheral edge of a grindstone into a rounded shape and a straight shape, and which can quickly finish the grindstone with accurate dimensions.

Conventionally, when forming a grinding wheel for a grinding machine, a jig that can move the diamond tool in the radius direction and a jig that moves it in the straight direction are manually operated separately, and the process is repeated while forming and inspecting. The method of finishing the specified shape and the automation of that work, such as a copying device or N
There are devices that are converted into C.

However, although copying devices and NC devices are optimal for mass molding of complex irregular shapes, they are economically unsuitable for prototypes or molding of a wide variety of small quantities. In the case of seeds, both of the aforementioned jigs are still used. However, finishing with this jig requires a skilled technique and does not allow even the slightest error, and it is especially difficult to finish the seam where the shape changes from a rounded shape to a straight shape during work. This invention was developed in order to solve the above-mentioned conventional drawbacks, focusing on the above points, and it provides circular motion and linear motion to the forming tool by rotating a manual handle supported on the base. It is characterized by being configured such that the motion of either one of these is selectively transmitted to the tool holder to shape the grindstone into a desired shape, and the molding can be performed while comparing the molding situation with the template by projection. be.

Hereinafter, embodiments of the present invention will be specifically explained with reference to drawings showing a state in which it is installed on a column type surface grinder.
A support part B is provided on the side surface of a column C of a surface grinder A, a dresser D is fixed to the support part B, and an optical system device E for detecting the forming condition is provided on the dresser D.

Therefore, the support part B is a base 1 protruding from the side surface of the column C.
There is a guide table 2 that moves in the left-right direction with respect to the table of the grinding machine A, and on the guide table 2 there is a sliding table 3 that moves in the front-rear direction with respect to the table.

Further, the sliding table 3 has a movable table 5 which can rotate around a pivot 4 erected thereon, and an arm 6 protrudes from the movable table 5. A dresser D is attached to the arm 6. The movable base 5 is configured to maintain a predetermined phase by a clamper device 1 provided on a pivot shaft. Note 6 Sliding table 3
An angle-adjustable dock 8 is attached to the movable base 5, and a stopper 9 is provided protruding from the movable base 5 to move the movable base 5 back in an accurate phase. Dresssa I D is the 4th
As shown in the figure, the base 10 is rotatably attached to the arm 6 protruding from the support part B, and the cylindrical shaft 11 is rotatably fitted in the base 10 in an upright state. A rotating ring 13 is provided on the outer peripheral surface of a disc 12 that is integral with the disc 12.

A shaped annular groove is provided on the opposing surfaces of the disc 12 and the rotating ring 13, and a ball 14 is inserted between both grooves, so that the rotating ring 13 is connected to the cylindrical shaft 11.
It is rotatably supported around the same axis as, and
Support plates 15, 15 having a rectangular shape are fixed to the lower surface of the rotating ring 13, passing through the cylinder WBll.
V-shaped guide rails 16, 16 provided on the sides of 5, 15
The movable plate 17 is supported slidably in a direction perpendicular to the axis of the cylindrical shaft 11 via a ball 18 between the movable plate 17 and a V-shaped groove provided in the movable plate 17. A tool holder 19 is provided protruding from the lower surface of the movable plate 17, and a forming tool F such as a diamond is attached to the lower end of the tool holder 19. The cutting edge of the forming tool is mounted so as to be located below the cavity of the cylindrical shaft 11, and the protrusion of the cutting edge is adjusted by adjusting the adjustment screw 20 screwed into the tool holder 19 to form the rounded part of the outer peripheral surface of the grindstone G. It is configured so that the diameter can be adjusted.
Further, an operating shaft 22 with a handle 21 is supported on the base 10, and the cylindrical shaft 11 is engaged with the operating shaft 22 so as to rotate through a gear 23 such as a worm.
The rotary motion of the movable plate 17 is configured to linearly reciprocate along the support plate 15 via the rack 24, and the rotary ring 13 is fixed to the base 10 to prevent rotation of the rotary ring 13. A first clamper 25 and a second clamper 26 are provided to fix the rotary ring 13 and movable plate 17 to each other. The first clamper 25 includes a shaft 2 having a brake plate 28 fixed to the rotary wheel 13 and a cam portion that sandwiches the brake plate 28.
7, and the second clamper 26 includes a protrusion 29 provided on the rotary ring 13 and a swing piece 30 attached to the movable plate 17 and fitted into the protrusion 29. Next, in the optical system device E, a light projector 31 is provided on the table t of the grinding machine A, and the light from the projector 31 passes through a mirror 32, passes through the tip of the forming tool F, and passes through the cylindrical shaft of the dresser D. 1
The light passes through the cavity 1 and enters the projector 33 fixed to the arm 6.

Vertical and horizontal center lines 35 and 36 are drawn on the image plane 34 of the projector 33, and a transparent master gauge with a predetermined shape and a center line drawn on the front surface of the image plane 34 is removably attached. installed. The present invention has the above structure, and the forming tool F provided on the dresser D rotates in a circle on a plane about the imaginary center line of the cylindrical shaft 11, and when the forming tool F is rotated on the support plate. In some cases, the guide rails 15, 15 may reciprocate in a straight line parallel to both the guide rails 16, 16.

When rotating the former, loosen the first clamper 25,
When the second clamper 26 is tightened and the handle 21 is turned to the left or right, the cylindrical shaft 11 is rotated via the operating shaft 22. At this time, the movable plate 17 and the rotating ring 13 are connected to the second clamper 26.
Since the rack 24 fixed to the movable plate 17 acts as a spline groove on the cylindrical shaft 11, it prevents the movable plate 17 from linearly reciprocating movement, and the movable plate 17 along with the rotary ring 13 moves against the cylindrical shaft. Rotates around 11. When the latter is to be reciprocated in a straight line, the second clamper 26 is loosened and the first clamper 25 is tightened, and the handle 21 is also tightened.
When turned, the rotating wheel 13 is fixed to the base 10 and its rotation is prevented. Therefore, the rotational motion of the cylindrical shaft 11 is converted into a linear motion of the movable plate 17 via the rack 24, and the movable plate 17 slides along the guide rails 16, 16 of the support plates 15, 15. Furthermore, as shown in Figure 1, the grindstone G
In a specific example, the tip is formed into a rounded surface a, and both sides of the rounded surface a are finished into linear surfaces B and b extending in the tangential direction of the circular arc, so that the projection of is projected on the image plane of the projector 33. To explain further, first perform the setting work.

Next, the rounded surface a and the straight surface b are finished in sequence, and the setting work is done by illuminating the cutting edge of the forming tool F from below and viewing the image projected on the screen with the master gauge attached to the forming tool. The degree of protrusion of the cutting edge of F is adjusted using the adjusting screw 20, and the radius of the rounded portion of the outer peripheral surface of the grindstone G is determined. Then, move the dresser D in the left-right and front-back directions,
The image of the grindstone G is aligned with the center lines 35 and 36 on the image plane 34 and set at an accurate position. After setting in this manner, the grindstone G is formed into a predetermined shape by driving the dresser D as described above. Although the above setting work involves moving the dresser D, it is also conceivable to conversely configure the grindstone G to be set by adjusting its movement.

As described above, the grindstone forming device according to the present invention includes a cylindrical shaft and a rotary ring provided on the base so as to be rotatable around the same axis, and a tool holder provided on the rectangular support plate fixed to the rotary ring. A support lever that allows the movable plate to slide in a direction perpendicular to the axis of the cylindrical shaft, and a rack that is rotated by an operating shaft provided on the base of the cylindrical shaft and is fixed to the movable plate is engaged with the cylindrical shaft,
Furthermore, a first clamper tightens the base and the rotating ring to prevent rotation of the rotating ring and allows sliding of the movable plate, and a second clamper fixes the rotating ring and the movable plate to each other and alternately tightens the rotating ring and the movable plate. Simply by relaxing and rotating the operating shaft, the forming tool attached to the tool holder moves in a circular or linear motion.

This greatly simplifies the shaping process, and since the grindstone is shaped continuously by switching the clamper when moving from the rounded part to the straight part to be finished, a stepped part can be formed between the two parts. It can be finished in a smooth condition without any fear of it occurring.
Furthermore, the dresser is provided with a cavity formed by a cylindrical shaft, and the light emitted from below the forming tool is incident on the projector through this cavity, making it possible to reliably monitor the finish of the grindstone during forming operations. This eliminates the conventional inspection work of checking the dimensions one by one on a scale, allowing the shape to be quickly finished with accurate dimensions.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the grindstone forming device according to the present invention attached to a surface grinder, Fig. 2 is a plan view thereof, and Fig. 3
The figure is a side view showing the main parts of the apparatus, and FIG. 4 is a sectional view of the dresser. A: Surface grinder, C: Column, t
...Table, B...Support part, 1...
...Base, 2...Guidance platform, 3...
Sliding base, 4... Pivot, 5... Movable base,
6...Arm, 7...Clamper device, 8...Dock, 9...Stopper,
D...Dretsusa 1, 10...Base,
11...Cylindrical shaft, 12...Disc, 13
... Rotating wheel, 14, 18 ... Ball,
15...Base plate, 16...Guide rail, 17...Movable plate, 19...Tool holder 20...Adjustment screw, 21 ...Handle, 22...Operating shaft, 23...Gear, 24...Rack, 25...First clamper, 426. ...Second clamper 1, F...
...Forming tool, E...Optical system device, 31.
...Floodlight, 32...Mirror, 33...
...Projector, 34...Image surface.

Claims (1)

[Claims] 1 A cylindrical shaft 11 rotated by an operating shaft 22 and a rotary ring 13 with a rectangular support plate 15 protruding from the base 10 are supported rotatably around the same axis, and a tool holder 19 is mounted on the support plate 15. A movable plate 17 is supported slidably in a direction orthogonal to the axis of the cylindrical shaft 11.
A first clamper 25 is attached to the base 10, which prevents rotation of the rotary ring 13 and allows the movable plate 17 to slide, and a second clamper 26 is attached to the base 10, which fixes the rotary ring 13 and the movable plate 17 to each other and allows them to rotate together. and a movable plate 17, respectively, and includes a projector 23 that receives light projected onto the cutting edge of the forming tool F attached to the tool holder 19 through a cavity of the cylindrical shaft 11. Molding equipment.