JPH0569290A - Workpiece supplying device of centerless grinder - Google Patents

Abstract

PURPOSE:To provide a workpiece supplying device which is capable of supplying ring-shaped workpieces in a continuous and accurate manner to a centerless grinder. CONSTITUTION:A workpiece supplying device is provided with a pair of rollers 10, 11 which are separated from each other in parallel in the horizontal direction on the workpiece supplying side in a centerless grinder in such a manner as being inclined in the vertically opposite direction, and the distance (L) in the horizontal direction of the respective rollers 10, 11 is set in an adjustable manner. The supporting angle of a workpiece (W) is adjusted by appropriately adjusting the distance (L) of the respective rollers 10, 11. The feeding force of the workpiece (W) is determined by this supporting angle, and the forces acting on the workpiece (W) can be balanced in connection with the moment by adjusting this supporting angle, enabling continuous and accurate supply of workpieces (W) without inclination thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work feeding device for a centerless grinding machine capable of continuously and accurately supplying a disk-shaped or ring-shaped work to the centerless grinding machine.

[0002]

2. Description of the Related Art As is well known, a centerless grinder is a machine that grinds the outer circumference of a cylindrical or disk-shaped work with a grindstone. This centerless grinding machine is equipped with a grindstone that grinds the outer periphery of the workpiece and an adjusting wheel that is provided substantially parallel to and spaced apart from the grindstone to advance the work. Is given a forward force by the above, and is ground by a grindstone while proceeding from the supply side to the discharge side. The grindstone is inclined so that the discharge side is narrowed by a slight angle with respect to the traveling direction of the work, and the outer circumference of the work is ground by this.

Generally, a work to be ground by a centerless grinder has a small diameter-to-width ratio, and a blade supporting the work from below and a regulating wheel can stably stand on its own, so that one work is inserted from the supply side. Self-propelled to the discharge side and grinding progresses.

However, for a work such as an outer rotor of an oil pump, which has a large diameter-width ratio and can be regarded as a ring rather than a cylinder, the work stably stands on its own between the blade and the adjusting wheel. Since it is impossible, if the works are fed one by one, it is not possible to perform fall grinding during the grinding. Therefore, when such a ring-shaped work is continuously processed by the centerless grinder, it is necessary to continuously feed the work without interruption.

Conventionally, in order to continuously supply a ring-shaped work to a centerless grinding machine, as shown in FIGS. 9 and 10, a cross section is made to the left between the grindstone 1 and the adjusting wheel 2 of the centerless grinding machine. A long V-shaped saddle 3 is provided.
A large number of workpieces W ... are placed on the work
It was carried out by pushing it toward the space between the car and the adjustment car 2.

[0006]

However, in the above case, since it takes a worker's hand to push out a predetermined number of works W ..., it is troublesome and the force of pushing out the works W ... Therefore, it is difficult to accurately feed the workpieces W, that is, to push the works W in parallel to the traveling direction.

Therefore, on the supply side of the works W ..., a pair of rollers, which are parallel to and spaced apart from each other in the horizontal direction, are provided in place of the saddle 3 in such a manner that they are vertically tilted slightly in opposite directions, and the works are placed on these rollers. It is conceivable that the work is moved forward by rotating the and the work is continuously supplied to the centerless grinding machine. In this case, the work on the roller is continuously supplied between the grindstone 1 and the adjusting wheel 2,
Further, the work W is discharged to the saddle 4 on the discharge side.
... is connected from the supply side to the discharge side. The workpiece W on the supply side, that is, the workpiece W on the roller receives a force from the roller, the workpiece W on the centerless grinder receives a force from the grindstone 1, the adjusting wheel 2 and the blade 5, and the workpiece W on the discharge side. ... receives a force from the saddle 4 provided on the discharge side. The point of action of the force acting on these workpieces W ... is on the supply side,
Since it is different on the centerless grinding machine and on the discharge side, even if a workpiece with a certain diameter can be continuously and accurately supplied, if a workpiece with a different diameter from this workpiece is supplied, the force balance will be disrupted. However, there is a drawback that the cylindricity is slightly tilted with respect to the traveling direction.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a supply device capable of accurately and continuously supplying a work to a centerless grinding machine.

[0009]

In order to achieve the above-mentioned object, a work supply device for a centerless grinding machine according to the present invention includes a pair of rollers, which are arranged parallel to each other in the horizontal direction, on the work supply side of the centerless grinding machine. The upper and lower portions are provided so as to be inclined in mutually opposite directions, and the distance between both rollers in the horizontal direction is adjustable.

[0010]

In the work supply device for the centerless grinding machine of the present invention, the support angle of the work can be adjusted by appropriately adjusting the distance between the rollers.
Since the feed force of the work is determined by this support angle, the force acting on the work can be momentarily balanced and balanced by adjusting this support angle, thus preventing the work from tilting. it can.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a work supply device in a centerless grinding machine of the present invention will be described below with reference to the drawings.

In these drawings, reference numerals 10 and 11 denote a pair of rollers. These rollers 10 and 11 are separated from each other in the horizontal direction and are provided substantially parallel to the axis of the grindstone 1 of the centerless grinder in plan view. Further, the rollers 10 and 11 are inclined in the vertical direction, and the inclination directions are set to be opposite to each other. That is, the roller 10 on the back side in the direction orthogonal to the paper surface in FIG. The roller 11 on the front side is inclined toward
Is gradually inclined upward as it goes to the right. In this way, by inclining the rollers 10 and 11 and rotating the rollers 10 and 11 in the direction of the arrow shown in FIG. 1, a force (feed force) F directed to the right from the rollers 10 and 11 is applied to the work W ... As a result, the works W move to the right at a predetermined speed.

Here, the feed speed V and the feed force F are given by the following equations. V = V ₀ sin φ = πdN sin φ F = 2 μT = μW / cos θ V ₀ : Roller peripheral speed (mm / min), μ: Dynamic friction coefficient between roller and workpiece φ: Feed angle (deg), T: Roller reaction force (k)
g), d: Roller diameter (mm), W: Work weight on the roller (kg) N: Roller rotation speed (rpm), θ ₁ : Work support angle (deg)

Further, the rollers 10 and 11 are provided so as to be freely contactable and separable in the left-right direction in FIG. Therefore, the support angle θ of the work can be adjusted by adjusting the separation distance L between these works. The feed force F can be adjusted by adjusting the support angle θ of the work.

The work supply device configured as described above is arranged on the supply side of the centerless grinding machine as shown in FIG. The works W are successively conveyed from the supply side stocker 15 to the work supply device via the supply side chute 16 and inserted into the rollers 10 and 11 by the work pusher 17. On the other hand, the work ground by the grindstone 1 of the centerless grinder is carried out to the exit side saddle 4 having a V-shaped cross section, and stored in the discharge side stocker 20 via the discharge side chute 19.

The work W on the work supply device is supported as shown in FIG. 6, and the work W supplied from the work supply device to the centerless grinding machine is supported as shown in FIG. Work W discharged from the board
... are supported as shown in FIG. In order to supply the work W to the centerless grinder from the work supply device without tilting, the frictional force (feed force) between the work W and the rollers 10 and 11 is F ₁ , F ₂ , and the friction between the work W and the grindstone 1. The force is F ₃ , the work W ... and the frictional force of the adjusting vehicle 2 is F ₄ , the work W ...
If the frictional force between the blade 5 and the blade 5 is F ₅ , the frictional force between the work W ... and the exit side saddle 4 is F ₆ and F ₇ , and the support angles θ ₁ and θ ₂ are set so as to satisfy the following equation, the work W Since the forces acting on the work pieces are momentarily balanced, the work pieces W can be moved forward without tilting. Note that F ₃ , θ ₃ , F ₄ ,
θ ₄ , F ₅ , θ ₅ are determined by the grinding conditions and the structure, and F ₆ , θ ₆ ,
F ₇ and θ ₇ are unadjustable amounts determined by the size and structure of the work.

F ₁ cos θ ₁ + F ₂ cos θ ₂ = F ₃ cos θ ₃ + F ₄ cos θ ₄ + F ₅ cos θ ₅ + F ₆ cos θ ₆ + F ₇ cos θ ₇

[Number 2] _{F 1 sinθ 1 -F 2 sinθ 2} = F 3 sinθ 3 -F 4 sinθ 4 + F 5 sinθ 5 + F 6 sinθ 6 -F 7 sinθ 7

In order to determine θ ₁ and θ ₂ so as to satisfy the above equation, the distance L between the rollers 10 and 11 can be adjusted. That is, θ ₁ and θ ₂ increase as the distance L between the rollers 10 and 11 increases,
The feed forces F ₁ and F ₂ are increased.

Therefore, according to the supply device having the above structure, even if the points of action of the forces acting on the works W are different on the supply side, on the centerless grinder, and on the discharge side, the roller 1
By adjusting the separation distance L of 0 and 11, the work W
Since it is possible to balance the force acting on the work piece momentarily, the work W can be accurately and continuously supplied to the centerless grinding machine without tilting.

[0019]

As described above, according to the work feeding device for the centerless grinding machine of the present invention, a pair of rollers, which are horizontally separated from each other in the horizontal direction, are vertically provided on the work feeding side of the centerless grinding machine. Since the rollers are provided so as to be inclined in the opposite direction and the distance between the rollers in the horizontal direction is adjustable, the support angle of the work can be adjusted by appropriately adjusting the distance. Since the feed force of the work is determined by this support angle, the force acting on the work can be momentarily balanced and balanced by adjusting this support angle, so that the work can be accurately and continuously performed without tilting. Can be supplied to a centerless grinder. Therefore, the defective cylindricity does not occur in the work.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a schematic configuration of a work supply device of the present invention.

FIG. 2 is a side view showing a schematic configuration of a work supply device of the present invention.

FIG. 3 is a plan view of FIG.

FIG. 4 is a layout view of automation of work supply of a centerless grinding machine.

FIG. 5 is a plan view showing a schematic configuration in which a work is being supplied from a work supply device to a centerless grinding machine.

6 is a sectional view taken along line AA in FIG.

7 is a sectional view taken along line BB in FIG.

FIG. 8 is a sectional view taken along line CC of FIG.

FIG. 9 is a plan view of a centerless grinding machine for explaining a conventional work supply method.

FIG. 10 is a sectional view of a centerless grinding machine.

[Explanation of symbols]

 1 Grinding stone 2 Adjusting wheel 4 Discharge side saddle 5 Blades 10 and 11 Roller W Work

Claims (1)

[Claims] 1. A cylindrical grindstone rotatably provided,
A cylindrical adjustment wheel that is rotatably provided with its axis substantially parallel to the wheel and a workpiece that is provided between the wheel and the adjustment wheel and that moves between these wheels while being ground by the wheel In a supply device for supplying a work to a centerless grinding machine equipped with a blade for, a pair of rollers that are parallel and spaced from each other in the horizontal direction are provided on the supply side of the work.
A work supply device for a centerless grinding machine, which is provided so as to be vertically inclined with respect to each other, and the horizontal separation distance between both rollers is adjustable.