JPS5831631Y2 - crowning dress device - Google Patents

Description

[Detailed explanation of the invention] This invention uses a diamond drainer attached to a rotating arm (hereinafter referred to as R arm) as a grindstone! A crowning dressing device that performs dressing by rotating in the direction, especially R
The adjustment mechanism for the turning radius of the arm is used to increase or decrease the width of the grinding wheel, which facilitates setup changes (changes in the amount of crowning) depending on the size of the workpiece model number.

Conventionally, the crowning dressing method shown in FIG. 1 has been used as an easy and stable crowning dressing method.

However, in this conventional method, when attempting to dress a grindstone with a large width by a predetermined amount of crowning, for example, with the same amount of crowning as a grindstone with a small width, the radius of rotation of the R arm becomes extremely large.

For this reason, there was a drawback that it could not be used for a grindstone with a large width dimension due to space limitations and rigidity.

In addition, there is a drawback that the R arm needs to be changed every time the stage is changed depending on the workpiece (product) model number (every time the crowning amount is changed).

This device was developed in view of the above-mentioned drawbacks of the conventional device, and was developed to improve the R.
It is an object of the present invention to provide a crowning dressing device that can extremely easily perform predetermined crowning dressing on grindstones of various widths by replacing only the plate cam without replacing the arm.

The structure of this invention will be described below with reference to the principle diagrams shown in FIGS. 2 and 3 and the specific embodiments shown in FIGS. 4 and 5.

FIG. 2 shows a principle diagram when the width of the grinding wheel is small.

In the drawing, A is a grindstone and B is a diamond.

Further, 2b is the grindstone width, 2r is the grindstone diameter, and R is the arm length (R arm's turning radius).

6) 1 is the grinding wheel diameter 2 to obtain the predetermined crowning amount δ
The diamond core height movement amount △h' calculated from r is calculated from the grinding wheel width 2b when the rotation radius of the R arm is constant (when the rotation radius of the R arm is not corrected by the correction mechanism according to the present invention). This is the amount of diamond core height movement.

Note that Δh and R are expressed by the following formula.

FIG. 3 shows a principle diagram when the width of the grinding wheel is large.

Δh and Δh' are the same as in FIG.

In both FIGS. 2 and 3, A is the trajectory of diamond B when the length of the R arm is constant, and mouth is the trajectory of the diamond required to obtain a predetermined amount of crowning.

A specific device according to this invention will be explained below with reference to FIGS. 4 and 5.

In the figure, 1 is a diamond for draining a grindstone, and 2 is a diamond holder, which is supported by a parallel plate spring 3.

Reference numeral 4 denotes a plate spring fixing plate, and a roller 8 supported by a shaft 5 is attached to the tip.

Reference numeral 7 denotes a plate cam for correcting the locus of the diamond core, which is positioned by a parallel pin 8 and attached to an immovable fixed arm 9.

The bearing 10 positions the fixed arm 9 and cuts off the rotational torque of the rotating shaft 13.

The taper pin 11 fixes one end of the fixed arm 9 and the fixed shaft 12, and the other end of the fixed shaft 12 is fixed to the case lid 18 with a taper pin 19.

The R arm 14 is connected to a plate spring fixing plate 4 and a diamond holder 2 through the plate spring 3. It is equipped with a draining diamond 1 and is attached to a highly rigid rotating shaft 13 supported by two tapered bearings 15 and 17.

Rotation is given to the R arm 14 by driving the pinion 16 attached to the rotating shaft 13 by the rank cylinder 20.

In the above structure, when the correction plate cam 1 is moved, the trajectory of the diamond 1 is rotated by the rank cylinder 20 with an unchanging radius of rotation determined by the dimensions of the R arm 14J, the plate spring fixing plate 4, the diamond holder 2, etc. , as shown in A of FIGS. 2 and 3.

However, in order to obtain a predetermined amount of crowning, it is necessary to
The trajectory of the mouth shown in FIGS.

The diamond holder 2 supported by the parallel plate spring 3 is the plate spring 3
It is constantly pressed against the plate cam 1 via the roller 6 due to the preload.

Since the plate cam 7 is attached and fixed to the fixed arm 9, when the R arm 14 rotates, the locus of the diamond 1 supported by the parallel plate spring 3 draws an arc and the correction plate cam 7
Moves according to the shape of.

For this reason, the opening is as shown in FIGS. 2 and 3, and by replacing the plate cam 7, it is possible to obtain a predetermined crowning with each grindstone.

As explained above, this invention has an oscillating drive device such as a rank cylinder...Using and an oscillating R
an arm, a diamond holder installed on the R arm via a parallel plate spring, having a diamond on the side surface and a roller on the lower surface, and a diamond holder that is attachable to and detachable from the housing at the lower part of the diamond holder; It consists of a turning radius correction plate cam with an arcuate cam surface whose mounting position in the vertical direction can be freely adjusted, and the roller of the diamond holder rolls on the correction plate cam surface by the turning movement of the R arm. Regarding the crowning dress device, which is characterized by the ability to freely adjust the turning radius of the R arm, the entire device can be made larger by changing only the plate cam when changing the width of the grinding wheel depending on the size of the product model number. , or miniaturization, that is, it can be done without changing the R arm length, and it is possible to easily and stably obtain a predetermined amount of crowning. It is extremely effective as a grindstone correction device.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a conventional crowning dress method using the R dress method, and FIGS. 2 and 3 are diagrams each explaining the principle of the crowning dress method according to this invention.
FIGS. 4 and 5 are drawings showing specific embodiments of this invention. 1...Diamond, 2...Diamond holder, 3...Parallel leaf spring, 5...Shaft, 6...
...Roller, 7...Plate cam for diamond core trajectory correction, 8...Parallel pin, 9...Fixed arm, 10...Bearing , 11... Taper pin, 12... Fixed shaft, 13...
・Rotation axis, 14...R arm.

Claims (1)

[Scope of utility model registration request] A diamond holder includes a housing having a swing drive device such as a rank cylinder, an R arm that swings, and a diamond holder installed on the R arm via a parallel plate spring, having a diamond on the side surface and a roller on the bottom surface. and a turning radius correction plate cam having an arcuate cam surface, which is detachably attached to the housing at the bottom of the diamond holder and whose mounting position in the vertical direction can be adjusted. A crowning dress device characterized in that the turning radius of the R arm can be adjusted by rolling the roller of the diamond holder on a correction plate cam surface.