JPH071242Y2 - Polishing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a polishing machine for processing a roller-shaped (cylindrical, conical, cylindrical, etc.) material to be ground from grinding to mirror polishing.

[Conventional technology]

As a method of bringing a rotating grindstone into contact with the peripheral surface of a rotating roller-shaped material to be ground and keeping the contact state and polishing the material while the grindstone is running between both ends of the material to be ground, there is already JP-B-51-46315. It is known from the publication.

[Problems to be solved by the invention]

A weight that can be moved and adjusted is provided on a base material that oscillates like a seesaw, and a grindstone is brought into pressure contact with a material to be ground by a natural fall due to the weight of the weight.

According to such a pressure contact method, when the peripheral surface protrusion of the material to be ground faces the grindstone, it pushes up the grindstone, and the above-mentioned pushing up suddenly occurs due to the high-speed rotation of the grindstone and becomes a strong ascending force, and also rises. When the force is attenuated, it will fall by the weight, so the movement of the grinding stone to rise again due to the collision between the grinding material and the grinding stone that occurs as it descends (the grinding stone comes in contact with or separates from the grinding material) repeat.

As a result, there is a problem that a jump phenomenon occurs in the grindstone, a roundness and a high surface roughness cannot be obtained, and heavy grinding cannot be performed.

Further, since there is a considerable distance between the fulcrum of the base material and the drive spindle of the grindstone, a small amount of runout on the fulcrum side is greatly expanded on the spindle side.

Therefore, chattering occurs in the grindstone (especially, as the weight approaches the spindle side), a good mirror surface (surface roughness) cannot be obtained, and the fulcrum portion must have a strong structure. However, if the structure is tough, the frictional resistance becomes large and the micro-machining force necessary for mirror polishing cannot be obtained.

Furthermore, the pressure applied by the movement of the weight is a guide,
Highly skilled in setting the pressing force (because numerical control is not possible)
In addition, there was a problem that the pressing force fluctuated due to the abrasion of the grindstone.

Further, since the grindstone is raised by attaching and unloading the material to be ground by retracting the weight to the rear of the fulcrum, it is troublesome and there is a problem that the efficiency is remarkably lowered.

[Means for Solving the Problems]

In order to solve the above problems, the present invention provides a plate surface of a rotary grindstone provided on a carriage that reciprocally slides along the material to be ground while rotating the material to be ground. In the case of polishing while contacting,
An arm is supported in a suspended state so that the lower end can swing back and forth on the carriage, and a spindle with a drive function is supported on the lower end side of the arm, and the tip of this spindle is attached to the peripheral surface of the material to be polished. A grindstone for contacting the plate surfaces is provided, and further, a reciprocating table is provided with a grindstone pressurizing device capable of absorbing the pushing back force and adjusting the pressing force.

[Action]

After holding the material to be ground by the rotary chuck and the tailstock, the material to be ground is rotated by the drive of the rotary chuck.

Further, the grindstone is rotated by the drive of the spindle, and the lower end side of the arm is pushed out toward the peripheral surface of the material to be ground by the pressing device, so that the grindstone is pressed against the peripheral surface of the material to be ground.

On the other hand, the carriage having the arm slides back and forth between both ends of the material to be ground.

As a result, the peripheral surface of the material to be ground is polished.

Further, since the pressurizing device absorbs the push-back force acting on the arm, when the push-back force acting on the arm disappears, it is immediately pushed out.

Therefore, there is no jump phenomenon in which the grindstone comes in contact with or separates from the material to be ground.

〔Example〕

In the figure, reference numeral 1 denotes a bed. At both ends of the bed 1, a rotary chuck 2 of a headstock for supporting and rotating one end of a material to be ground A, and the other end of the material to be ground A are rotatably supported. A tailstock 3 is provided.

Further, on the bed 1, there is provided a carriage 4 that travels back and forth in parallel with the material A to be ground.

The carriage 4 is guided by a rail 5 having a sliding surface provided on both ends of the bed 1, a male screw 7 is screwed into a female screw 6 supported by the carriage 4, and a motor (not shown) is used. ), The male screw 7 is driven to rotate in the forward and reverse directions to slide back and forth.

Further, an arm 8 is supported on the carriage 4 in a suspended state so that the lower end can swing in the front-back direction.

Further, a spindle 9 with a drive function is attached to the lower end of the arm 8.
At the tip of the spindle 9, a grindstone 10 for contacting the plate surface with the peripheral surface of the material to be polished A is provided.

As shown in FIGS. 2 to 5, the suspension of the arm 8 is provided with a slider 12 guided in the front-rear direction by a rail 11 having a sliding surface on a carriage 4, and a female screw of the slider 12 is provided. The male screw 14 is screwed into the screw 13, and the male screw 14 is normally or reversely driven by the first motor 15 to slide the grindstone 10 together with the slider 12 in the front-rear direction, while freely adjusting the initial position of the grindstone 10. And a swivel seat 17 having a swivel support shaft 16 on the slider 12.
And a concentric elongated hole 18 centered on the pivot shaft 16 is provided on both side edges of the pivot seat 17, and the elongated hole 18
The screw shaft 20 with the handle 19 inserted into the
21 is screwed in to rotate the spindle 9 together with the swivel seat 17 to change the contact of the plate surface of the grindstone 10 with respect to the work material A to the whole surface or a part thereof. At the same time, an elevating frame 24 is provided for elevating and lowering using vertical rails 23 provided on opposite surfaces of the frame 22 as guides, and both ends are supported by projecting members 25 projecting forward from both upper ends of the elevating frame 24. Although the upper end of the arm 8 is rotatably supported via the supporting shaft 26, which is provided, it may be supported in a suspended manner by another method.

In addition, a male screw 27 that rotates at a fixed position is provided at the center of the upper side of the frame 22, the male screw 27 is screwed into the female screw 28 of the elevating frame 24, and the male screw 27 is normally rotated by the second motor 29. When driven in the reverse direction, the position of the axis of the spindle 9 can be adjusted while raising or lowering the spindle 9 together with the elevating frame 24.

The drive of the spindle 9 is such that the third motor 30 is installed in the upper part of the hollow arm 8 as shown in FIG. 2, and the pulley 31 of the third motor 30 and the end pulley of the spindle 9 are installed.
I tried to hang the belt 33 between 32 and
The drive may be performed by other methods.

Further, the carriage 4 is provided with a pressurizing device 34 capable of absorbing the force to be pushed back and adjusting the pushing force.

As shown in FIG. 2 and FIG. 6, the pressurizing device 34 is provided with a tubular body 35 that projects forward from the upper surface of the swivel seat 17, and the front seat is provided in the tip of the tubular body 35. 36 is slidably mounted, and the tip end side of the projecting shaft 37 projecting from the center of the front surface of the front side seat 36 is projected from the tip end of the tubular body 35 so that the tip surface of the projecting shaft 37 is set in the arm 8 Of the cylindrical body 35, which is brought into contact with the rear surface of the projecting piece 38 projecting downward from the lower end of the cylindrical body, and the rear side seat 39 is slidably incorporated in the end of the cylindrical body 35.
Both ends of the spring 40 fitted inside 35 are attached to the front side seat 36 and the rear side seat 39.
And a male screw 41, which is supported to rotate in a fixed position, is screwed into the rear seat 39, and the fourth motor
Although the male screw 41 is driven by 42 and the spring 40 is compressed or extended by the sliding of the rear seat 39, the pressure can be freely adjusted, but other than the above, for example, an air cylinder may be used. .

When the plate surface of the grindstone 10 is slightly pressed to the peripheral surface of the material A to be ground by the pressing device 34 and the grindstone 10 starts to come into contact with the peripheral surface protruding portion of the material A to be ground during polishing. , The arm 8 is pushed back while compressing the spring 40 by the amount of protrusion of the protrusion.

At this time, since the pressure applied by the pressure device 34 is constantly acting on the grindstone 10, the grindstone 10 is not detached from the work material A at all. That is, the grindstone 10 is constantly in pressure contact with the work material A.

Further, even when the grindstone 10 has passed through the protruding portion and is finished, the grindstone 10 is pressed against the material A to be ground in the same manner as described above, and there is no separation phenomenon due to the reaction, and the follow-up polishing is performed.

Further, if a lock device 43 for stopping the swing of the arm 8 is provided on the carriage 4, grinding with the grindstone 10 can be performed.

As shown in FIG. 2, the lock device 43 uses a hydraulic cylinder, and is configured to press the lower end front surface of the arm 8 against the stopper 44 of the swivel seat 17 by an extension action to stop the swing.

〔effect〕

As described above, according to the polishing machine of the present invention, since the grindstone is pressed against the material to be ground by the pressure device capable of absorbing the push-back force, when the protruding part of the material to be ground faces the grindstone. If the grindstone is loosened against the material to be ground,
There is no jumping phenomenon (a tapping phenomenon) that presses the loosened grindstone against the work material.

For this reason, it is possible to polish the grindstone as if it were adsorbed on the polishing surface, and it is possible to eliminate the adverse effect on the polishing surface.

Also, since the spindle whose axis is horizontal is supported on the lower end of the arm supported in the suspended state, and the grindstone provided at the tip of this spindle is brought into contact with the material to be ground from the lateral direction. On the other hand, the weight of the grindstone and the arm do not act, and a slight pressurization can be applied only by the pressurizing device.

[Brief description of drawings]

FIG. 1 is a plan view of a grinding and polishing machine according to the present invention, FIG. 2 is a longitudinal side view of the same, FIG. 3 is a front view of an arm portion, and FIG.
The drawing is a horizontal plan view of the same as above, FIG. 5 is a horizontal plan view of a fulcrum portion of an arm, and FIG. 6 is a horizontal enlarged plan view of a portion of a pressure device. 1 ... bed, 2 ... chuck, 3 ... tailstock, 4 ... reciprocating carriage, 8 ... arm, 9 ... spindle,
10 …… Whetstone, 26 …… Spindle, 30 …… Third motor, 31,32
...... Pulley, 33 …… Belt, 34 …… Pressurizer.

Claims (1)

[Scope of utility model registration request] 1. Polishing while rotating a grinding material while contacting a plate surface of a rotary grindstone provided on a carriage that reciprocally slides along the grinding material with a peripheral surface of the grinding material. In the above-mentioned one, the arm is supported in a suspended state so that the lower end can swing in the front-rear direction on the carriage, and a spindle with a drive function is supported on the lower end side of the arm, and a material to be polished is attached to the tip of the spindle. A grinder equipped with a grindstone for bringing a plate surface into contact with the peripheral surface of the grindstone, and further provided with a grindstone pressurizing device capable of absorbing the pushing back force and adjusting the pressing force in the carriage. .