JPS6242747B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stone grinding machine, and more particularly to a stone grinding machine suitable for improving the precision of the surface to be ground of stone.

In general, stone grinding machines are designed to perform grinding by pressing the stone grinding surface against the surface of the stone to be ground, and the pressure contact force is adjusted depending on the type of stone and each process from rough grinding to finish grinding. This is done in a step-by-step manner to prevent the occurrence of seizure between stones and to obtain the desired surface accuracy.

However, in conventional stone grinding machines that manually feed the stones, the pressing contact force is adjusted by the operator's hand, and a considerable amount of skill is required to obtain good surface accuracy. It is said that

In addition, in a conventional so-called vertical type stone grinding machine in which the carcass main shaft is arranged vertically, weights of various weights are placed on the rear end of the carcass main shaft to make it possible to adjust the pressing contact force. There is. However, in such a stone grinding machine, a large number of weights are required depending on the situation of the grinding work, and the work of changing weights becomes complicated.

In addition, in other conventional stone grinding machines, a stone and a fluid cylinder device are used to drive the feed, and the pressing force is adjusted by operating a pressure regulating valve, etc. provided in the piping system of the fluid cylinder device. There's something on. However, such a stone grinding machine has a problem in that it is difficult to properly adjust the pressing force contact force step by step due to the large resistance force inside the fluid cylinder device.

The present invention has been made in view of the above-mentioned conventional problems, and it is possible to detect the pressing contact force that acts between the stone and stone when they come into contact in each grinding process, and to detect the type of stone and each grinding process. It is an object of the present invention to provide a stone grinding machine that can accurately obtain a desired surface accuracy by grinding under an appropriate pressing contact force depending on the process.

In order to achieve the above object, the present invention provides a stone grinding machine that grinds a stone by pressing the stone into contact with the stone in the stone feeding direction when rotated, in which the stone is moved relative to the stone in the stone feeding direction. A stone supporting member that supports the stone without moving, a driving member that moves the stone supporting member in the stone feeding direction, and a driving member that is interposed between the stone supporting member and the driving member so that both can be moved relative to each other in the stone feeding direction. and biasing means for displacing the stone in contact with the stone to bias the stone support member against the drive member in the stone feeding direction, and for enabling the stone to come into pressure contact with the stone; Pressure contact force detection means that detects the pressure contact force of the stone on the stone material by detecting the amount of displacement of the biasing means under the state of pressure contact between the stone and the stone material, and displays the detection result in a visible state. and a manual operating means for manually driving the driving member and changing the pressing contact force displayed by the pressing contact force detecting means during the grinding operation.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory diagram showing a first embodiment of a stone grinding machine according to the present invention. A spindle motor 12 and a spindle head 13 which are connected to each other are fixed to the stone stand 11 as a stone supporting member. It is said that relative movement in the direction of stone feeding is impossible. As the stone 14, rough stones to finishing stones suitable for each grinding process from rough grinding to finish grinding are used. and stone platform 1
A housing 15 is fixed to the housing 1.
5 has a bush 16 and a bush 16 inside.
Thrust bearings 17 and 18 are provided on both sides of the shaft.

Intermediate shaft portion 20 of feed screw 19 as a driving member
is supported by the respective bearings in the housing 15 so as to be movable relative to each other in the stone feeding direction, and a handle 21 as a manual operation means is attached to the end of the intermediate shaft portion 20. A compression spring 22 as a biasing means is interposed between the attachment portion of the handle 21 and the thrust bearing 18 supported by the housing 15. The compression spring 22 is adapted to bias the stone stand 11 against the feed screw 19 in the stone feeding direction, and in a state where no resistance force in the feeding direction is applied to the stone 14, the stone stand 11 and the stone stand 11 are biased against the feed screw 19. The lead screw 19 is integrated with the lead screw 19, and when the stone is in contact with the stone 1, it is compressed and displaced so that the stone 14 can be pressed into contact with the stone 1. Further, the feed screw 19 is screwed into a female threaded portion 24 of the bed 23.

Further, a dial gauge 26 as a pressing contact force detection means is attached to the arm 25 disposed in the housing 15.
The contact 27 is in contact with the annular portion of the handle 21. The dial gauge 26 detects the pressing contact force of the stone 14 to the stone 1 by detecting the amount of displacement of the compression spring 22 under the state of press contact of the stone 14 to the stone 1, and visually checks the detection result. Display as possible.

Next, the operation of the first embodiment will be explained.
The spindle 14 is rotated by driving the main shaft motor 12, and the feed screw 19 is rotated by rotating the handle 21.
into the bed 23. When the stone base 11 is integrated with the feed screw 19 in the stone feeding direction,
As the feed screw 19 spirals, the stone 14 moves forward until it comes into contact with the stone 1. When the stone 14 comes into contact with the stone 1, the stone stand 11 stops. If the handle 21 is further rotated from this state, the feed screw 19 moves forward while gradually compressing and deforming the compression spring 22 interposed between it and the stone stand 11 in the stationary state. A pressing contact force proportional to the amount of compressive deformation of the compression spring 22 acts on the contact surface between the stone 14 and the stone 1, and the amount of compressive deformation of the compression spring 22 is proportional to the amount of compressive deformation provided between the housing 15 and the handle 21. It is read by the amount of displacement of the dial gauge 26. Therefore, when the displacement amount of the dial gauge 26 reaches a value corresponding to the pressing contact force of the stone 14 against the stone 1, depending on the type of stone 1 and the grinding process, the rotation operation of the handle 21 is stopped. In this state, if the stone 1 and the stone 14 are moved relative to each other in a plane perpendicular to the main axis of the stone 14, the stone 14 will be placed under the appropriate pressing contact force for the grinding process of the stone 1. In this step, the stone material 1 is ground to the desired degree of precision in the grinding process. When the grinding work in the above-mentioned grinding process is completed, the grinding stone 14 is replaced with a rough stone to a finishing stone as necessary, and the grinding stone 14 under the new grinding process is replaced with a dial gauge by the same operation as above. The compression spring 22 is compressed to a predetermined displacement amount in the new grinding process through a new reading of the displacement amount of 26.
Under the action of the urging force, the stone material 1 is ground while applying a pressing contact force that is considered appropriate in the new grinding process, and the grinding work is performed with the desired surface accuracy in the new grinding process. In this way, by completing all the grinding steps from rough grinding to finish grinding in the same manner one after another, it becomes possible for the stone material 1 to obtain a desired finished surface accuracy.

According to the first embodiment, in each grinding process, the pressing contact force that acts between the stone 14 and the stone 1 from the point of contact with the stone 1 is visually determined by the dial gauge 26 via the amount of deformation of the compression spring 22. By changing this pressing contact force with the manual handle 21 during the grinding process, the grinding work can be performed under a predetermined pressing contact force depending on the type of stone 1 and each grinding process. It becomes easy to appropriately manage the precision of the surface to be ground of the stone material 1.

FIG. 2 is an explanatory diagram showing a second embodiment of the stone grinding machine according to the present invention. A main shaft motor 32 and a main shaft head 33, which are connected to each other, are fixed to the stone stand 31 as a stone supporting member. It is said that relative movement in the direction of stone feeding is impossible. A pressure chamber 35 is formed in the stone stand 31 in a sealed state via a gasket 36, and the pressure chamber 3
A compressible fluid 37 serving as a biasing means is confined in 5 .

The bed 38 is equipped with a cylinder device 39,
A piston rod 42 as a driving member is reciprocated by operating valves 40 and 41 as manual operating means provided in a piping system connected to both ends of the cylinder device 39. The piston side of the piston rod 42 is a large diameter rod part 43, and the tip side of the large diameter rod part 43 is O.
Via the ring 44, it is always slidable along the inner circumferential wall of the pressure chamber 35 in the stone feeding direction. A small diameter rod part 45 is formed at the tip of the large diameter rod part 43, and the small diameter rod part 45 is slidable in the stone feeding direction with respect to the stone table 31 via an O-ring 46. A stopper 47 that can engage with the granite base 31 is formed at the tip of the small diameter rod portion 45 . The fluid 37 urges the piston rod 42 and the stone stand 31 in the stone feeding direction, and works together with the stopper 47 when no resistance force is applied to the stone 34 in the feeding direction. and stone stand 3
1 and the piston rod 42 are integrated, and the stone 34
When the stone 34 is in contact with the stone 1, the stone 34 can be pressed into contact with the stone 1 as a compressive displacement.

Furthermore, a pressure gauge 48 serving as a pressure contact force detection means is communicated with the pressure chamber 35, and the pressure contact force of the stone 34 on the stone 4 can be detected through detection of pressure changes in the fluid 37.

Next, the operation of the second embodiment will be explained.
The main shaft motor 32 is driven to rotate the granite 34, and the opening of the valves 40 and 41 moves the piston rod 42 forward. When the piston rod 42 and the stone 34 are integrated in the stone feeding direction via the fluid 37, the stone 31 advances as the piston rod 42 advances until the stone 34 comes into contact with the stone 1. When the stone 34 comes into contact with the stone 1, the stone stand 31 stops. When the piston rod 42 is moved further forward from this state, the large diameter rod portion 43 of the piston rod 42 moves the fluid 37 in the pressure chamber 35 which is in the stagnant state.
The stone moves forward while being gradually compressed, and a pressing contact force proportional to the pressure change of the pressure gauge 48 acts on the contact surface between the stone 34 and the stone 1. Therefore, if the displacement amount of the pressure gauge 48 is required in the grinding process, the stone 34
The valves 40 and 41 are operated to close when the pressure contact force on the stone 1 reaches a value equivalent to . In this state, if the stone 1 and the stone 34 are moved relative to each other in a plane perpendicular to the main axis of the stone 34, the stone 34 will be placed under the appropriate pressing contact force for the grinding process of the stone 1. In this step, the stone material 1 is ground with the desired surface accuracy in the grinding process. By sequentially completing such grinding work in all the grinding steps from rough grinding to finish grinding, it becomes possible for the stone material 1 to obtain a desired finished surface accuracy.

According to the second embodiment, in each grinding process, the pressing contact force that acts between the stone 34 and the stone 1 from the time of contact can be accurately grasped through the pressure change of the fluid 37, and the stone 1 type of,
By performing the grinding work under a predetermined pressing contact force corresponding to each grinding process, it becomes easy to appropriately manage the precision of the ground surface of the stone 1.

In each of the above embodiments, the case where a cylinder controlled by a manual handle and a manual valve (manual operating means) is used as the driving method of the driving member is explained, but it is not possible to use a cylinder controlled by a manual switch (manual operating means). Of course, it is also possible to use an electric motor or the like.

As described above, the present invention provides a stone grinding machine that grinds a stone by pressing the stone into contact with the stone in the stone feeding direction when it rotates, and supports the stone without relative movement in the stone feeding direction. Then, a stone supporting member, a driving member that moves the stone supporting member in the stone feeding direction, and a driving member that is interposed between the stone supporting member and the driving member so that they can move relative to each other in the stone feeding direction, and a biasing means for displacing the stone in contact with the stone to urge the stone support member against the drive member in the stone feeding direction, and to press the stone into contact with the stone; a pressing contact force detection means for detecting the pressing contact force of the stone against the stone by detecting the amount of displacement of the urging means under the pressing contact state of the stone, and displaying the detection result in a visible state; The member can be driven manually and includes manual operation means for changing the pressing contact force displayed by the pressing contact force detection means during grinding work. Therefore, in each grinding process, it is possible to adjust the pressure contact force that acts between the stone and the stone material when they come into contact with each other. This has the effect that the desired surface accuracy can be accurately obtained by grinding with a .

[Brief explanation of the drawing]

FIG. 1 is a partially sectional side view showing a first embodiment of a stone grinding machine according to the present invention, and FIG.
FIG. 2 is a partially cross-sectional side view showing an example. 11, 31... and stone stand (and stone support member), 1
4, 34... and stone, 19... feed screw (driving member), 21... handle (manual operation means), 22...
...Compression spring (biasing means), 26...Dial gauge (pressing contact force detection means), 37...Fluid (biasing means), 40, 41...Valve (manual operation means),
42... Piston rod (driving member), 48...
Pressure gauge (pressure contact force detection means).

Claims (1)

[Claims] 1. In a stone grinding machine that grinds stone by pressing the stone into contact with the stone in the stone feeding direction when it rotates, the stone supporting member and the stone support the stone without moving relative to the stone in the stone feeding direction. A driving member that moves the supporting member in the stone feeding direction; and a driving member that is interposed between the stone supporting member and the driving member so that they can move relative to each other in the stone feeding direction, and when the stone is in contact with the stone material. biasing means for displacing and biasing the stone support member against the drive member in the stone feeding direction and bringing the stone into pressure contact with the stone; The pressing contact force detection means detects the pressing contact force of the stone against the stone by detecting the amount of displacement of the biasing means, and displays the detection result in a visible state, and the driving member can be operated manually. A stone grinding machine comprising: a manual operating means for changing the pressing contact force displayed by the pressing contact force detecting means during grinding work.