JPH01281837A - Cutting or grinding device - Google Patents

Abstract

PURPOSE:To control a processed dimension and provide a process function with a prescribed dimension by mounting a control rod which can freely be advanced and retreated on a movable plate, and providing its end area opposite to the position detection area located on the upper area of a fixed basic plate. CONSTITUTION:A control rod 13 is mounted on a movable plate 10, and its end area 14 is provided opposite to a position detector 16 located on the upper area of a fixed base plate 15. As a result, according to a signal from the position detector 16 which is opposite to the end area 14 of the control rod, the starting position of cutting or grinding is accurately indicated, so that an effective fast forward operation can be performed and a wasteful time can be considerably saved, comparing with a processed dimension. And also the rotation of a grinding tool 4 with a workpiece 5, process preparations for grinding or the discharge of grinding lubricant and the like can automatically be performed. Since the movement of the control rod 13 immediately responds to the operation of the position detector 16, cutting and feed with a prescribed dimension for obtaining an appropriate process condition can be carried out in an active state, and a product with a preferable finished surface can efficiently be manufactured.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides the following advantages:
The present invention relates to a device for cutting or grinding a workpiece.

[Prior Art] Conventionally, a cutting or grinding tool is attached to one of two opposing rotating shafts, and a workpiece is attached to the end of the other shaft.

In a processing device that has a feed mechanism that moves one of the rotating shafts in the direction of the opposing shaft, visually check the cutting start position of the workpiece (111)! ! L. Taking into account the dimensions of the workpiece measured in advance, the machining depth of cut was determined, and the machining operation was sometimes interrupted to measure the dimensions of the workpiece, and when reprocessing, the handmade work was repeated.

[Problems to be Solved by the Invention] In conventional cutting or grinding devices of this type. The starting position of machining is automatically confirmed using a 1-position detector.

This is calculated in relation to the detected value of the linear scale.

By displaying the machining start point and end point as base points.

This is intended to control machining dimensions, and adds a function to digitally display the depth of cut of the feed device, or detects the contact position between the entire surface of the mounting plate of the workpiece and the front end surface of the tool, and starts the machining. The aim is to add an automatic sizing processing function by calculating the points and the finished dimensions of the workpiece, and setting the desired finished dimensions of the workpiece in the setting device, while at the same time simplifying the environmental management of the processing work. There is.

[Means for Solving the Problems] In order to achieve the above objects, the present invention provides a cutting tool (
A rotating shaft on a fixed table to which a milling cutter (milling cutter) or a grinding tool (1iIc stone) is attached, and a rotating shaft supported on a movable plate with a workpiece mounting plate on the end, are both on the same plane. A control rod that can move forward and backward is installed on the movable board and engaged with a feed screw shaft driven by a pulse motor, etc., and its tip is attached to the position of a touch switch, proximity sensor, load cell, etc. on a fixed board. It is installed opposite to the detector.
In addition, a function has been added that allows the stop position of the workpiece to be set at the start point of machining based on the signal from the reading head of the linear scale attached to the movable plate and the signal from the position detector. It also has a feeding function that can set the finished dimensions of the workpiece by detecting the contact position of the workpiece with the front surface of the mounting plate, and incorporates an automatic workpiece zero point correction system to adjust temperature, humidity, etc. It is equipped with a function to easily manage the machining work environment.

[Operation] In the processing operation using the cutting or grinding device configured as described above, first, the movable platen is sent out in the direction of the tool rotation axis, and the front surface of the workpiece mounting plate is brought into contact with the front end surface of the cutting or grinding tool. As a result, the position of the back surface of the workpiece is associated with the measured value of the linear scale and stored in the electronic control circuit (computer).

Next, move the movable plate back and fix the workpiece to the mounting plate. Move the movable plate forward again and bring the front end of the tool into contact with the workpiece. The position detector on the board issues a signal to start machining, which automatically drives both the rotation axes of the tool and workpiece, and also starts the minute cut feed of the movable platen. If the desired finishing dimension of the workpiece whose thickness has been previously measured is set in the sizing device, the electronic control circuit is activated.

Automatic sizing processing is performed by calculating the amount of material to be removed from the workpiece, displaying it, and at the same time instructing the cutting feed operation.

[Example] An example of the present invention will be described with reference to the drawings. In Figure 9, 1 is a rotating shaft that is supported on a fixed base 3 provided on the pace 2 and has a cutting or grinding tool 4 attached to its front end.

The rotating shaft 6 of the workpiece 5, which is opposite to this, has the workpiece 5 at the end.
A mounting plate 7 is attached thereto, and the plate 2 is rotatably supported on a movable plate 10 that is slidable in the direction of the rotating shaft 1 by guides 9, 9° that engage with rails 8 on the pace 2.

One movable plate is equipped with a control rod 13 that is screwed together with a screw shaft 12 connected to a pulse motor 11 or the like, so that movement in one rotation direction is stopped, and the control rod 13 can move only in the axial direction. corresponds to a position detector 16 such as a touch switch, a proximity sensor, or a load cell, which is provided on the upper part of a fixed base 15 that protrudes from the pace 2 and does not inhibit the sliding movement of the movable board 10.

17 is a linear scale attached to the movable plate 10, and the signal from the reading head 18 attached to the base 2f111 is
The signal is sent to the digital display s19 and is also input to the electronic control circuit that controls the drive of the pulse motor 11.

Also, on the lower side of the movable board 10, one end is attached to the metal fitting on the pace 2.
There is a spring 20 whose other end is engaged with the moving plate 10,
Although a force is applied to move the movable platen 10 in the direction of the fixed base 3, this movable platen can also be provided by other methods such as a hydraulic or pneumatic cylinder.

Reference numeral 21 is a cylinder attached to the movable platen 10 and whose rod end is connected to the fixed base plate 15 to enable high-speed sliding of the movable platen 10.

Reference numeral 22 denotes a changeover switch for a pulse generator that controls the drive of the pulse motor 11, and by operating it in combination with setters 23 and 23° of a programmable pulse controller, the moving speed of the control rod 13 can be controlled in multiple stages.

Reference numeral 24 denotes a sizing device for programming and inputting the finished dimensions of the workpiece 5. By this operation, the processing depth of the tool 4 is automatically displayed on the display 825.

Furthermore, the position detector 16 is not shown in the drawing.

The drive motors for the tool rotation shaft 1 and the workpiece rotation shaft 6 are electrically connected to the electronic control circuit of the pulse motor 11, respectively.

Since the present invention is constructed as described above, when an automatic start command is issued for the device in a state where the tool 4 and workpiece 5 are separated as shown in FIG.
As a result of the operation, the movable platen 10 is rapidly moved in the direction of the fixed base 3, and the tool 4 and the workpiece come close to each other.At the same time, the position detector 16 of the fixed base plate 15 also comes into contact with the tip 14 of the control rod 13, and a signal is output. send out.

In response to this signal command, the rotating shaft 1 of the tool 4 and the rotating shaft 6 of the workpiece 5 start rotating in opposite directions, and the feed operating force from the cylinder 21 is released, and the pulse motor 11
Since a forward rotation signal at a preset rotational speed is sent to the control rod, as the screw shaft 12 rotates, the control rod moves backward (moves to the right in the drawing), and following this, the movable plate 10 is moved by the spring 20. While being regulated by the movement of the control rod 13.

Moving forward at an appropriate speed, the workpiece 5 eventually comes into contact with the tool 4 as shown in FIG. 2, and the cutting movement continues to progress the cutting or grinding process.

During the process of this cutting feed processing.

When the tip 14 of the control rod 13 leaves the position detector 16, the detection signal 131 is turned off, so the forward rotation signal to the pulse motor 11 is interrupted and the control rod 13 is stopped.

For this reason, the workpiece 5 is machined under a constant pressure feeding state provided only by the spring 20, but as this continues, the movable platen 10 moves forward.

Since the tip 14 of the control rod 13 comes into contact with the 9-position detector 16 again, the ON signal from this makes the control rod 13
resumes the above-mentioned backward movement, secures a machining cutting speed suitable for the workpiece 5 within the appropriate machining pressure range, and performs normal cutting or grinding.

The above-mentioned gap between the control rod tips 14 occurs when the machining conditions given to the nine-piece machine are exceeded.

During this time, the backward movement of the control rod 13 is also interrupted by instructions from the electronic control circuit, which is controlled by detecting the load conditions of the drive motors of the tool rotation axis 1 and the workpiece rotation axis 6. It can be suppressed within time.

The signal from the read head 18 of the linear scale 17 is also sent to a digital display 19 so that the state of movement of the workpiece 5 can be read at any time. Since a signal from the position detector 16 that detects the movable state of the rod 13 is also input, it is possible to detect whether the cutting feed rate command of the control rod 13 is appropriate for the machining conditions of the workpiece 5.

Furthermore, the signal from the position detector 16 is stored in the electronic control circuit in relation to the detected value of the linear scale read head 18, so that the contact position of the tool 4, i.e., the proximity and contact position with the workpiece 5, can be determined. .

It is possible to set the contact position with the mounting plate 7 corresponding to the back surface of the workpiece 5 as the origin position of the feed amount.

For this reason, if the finished dimensions of the workpiece are input into the sizing device 24 in advance, cutting or grinding is actively performed without imposing stress on the workpiece, and this process is continued until the desired finished dimensions are achieved.

[Effects of the Invention] Since the present invention is configured as described above, the signal from the position detector corresponding to the tip of the control rod allows
Since the starting position of cutting or grinding is accurately indicated, effective rapid traverse operation is performed, and the amount of machining dimensions is significantly reduced.
The time required for large idle feeds can be significantly reduced, and machining preparations such as rotation of the tool and workpiece, cutting, and discharge of grinding fluid can be automatically performed.

In addition, since the operation of the position detector is immediately reflected in the movement of the control rod, the operation time of the movable plate that does not follow the movement of the control rod, that is, the machining time under the limit cutting pressure of the workpiece, can be kept to a minimum. By doing so, it is possible to actively perform constant speed cutting feed that adds appropriate machining conditions.
To efficiently manufacture products with excellent finished surfaces.

Furthermore, the signal from the position detector indicates the state of change in the feeding speed of the workpiece, and at the same time changes the operating speed of the reading display value of the linear scale, so by calculating the change in reading speed, the cutting speed can be determined. It is also possible to display the actual measured value.

The electronic control circuit also controls the operation of the position detector at a desired point, that is, the proximity and contact position between the tool and the workpiece, the contact position between the tool and the workpiece mounting plate, etc., in relation to the reading position of the linear scale. is memorized, so if you set the finished dimensions of the required product in the sizing device, the device will automatically adjust the reading resolution range of the linear scale until the workpiece is finished to the set dimensions. Continue processing.

Therefore, in managing the finished dimensions of the workpiece, by contacting the tool and the mounting surface of the workpiece, we comprehensively correct the amount of tool wear from previous machining and the dimensional fluctuations of each component of this machine due to temperature changes, etc. This eliminates the need for special in-process measuring equipment, and corrects the zero point command transmission timing of the electronic control circuit that stores the detection signal of the linear scale. So-called zero-shift feedback becomes possible, and as a result, temperature control becomes easier compared to conventional machining work environments, which is effective in improving the machining accuracy of products with this type of equipment and reducing machining costs. With.

This feature also reflects a reduction in the manufacturing cost of the device itself.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of a device according to the present invention. FIG. 2 is a partially cutaway front view showing a state in which the tool and the workpiece are in contact with each other. 1... Tool rotation axis. 3...Fixed stand. 4...Cutting or grinding tools. 5. ・Processed product. 6...Workpiece rotation axis. 7... Workpiece mounting board. 10...Moveable board. 11...Pulse motor. 12... Spiral shaft. 13...Control rod. 14...Control rod tip. 15...Fixed board. 16...Position detector. 17...Linear scale. 18...Reading head. 24...Size setting device patent applicant Sensei Seiki Co., Ltd.

Claims (4)

[Claims] (1) The rotating shaft on the fixed table to which the cutting or grinding tool is attached and the rotating shaft of the workpiece supported on the movable plate are provided on the same plane, and are driven by a pulse motor or the like on the movable plate. A cutting or grinding device characterized by being equipped with a control rod that is movable forward and backward and engaged with a feed screw shaft, the tip of which is disposed opposite to a position detector on the upper part of a fixed substrate. (2) The cutting machine according to claim 1, further comprising a function of detecting the feeding state of the workpiece based on a signal from a reading head of a linear scale mounted on the movable platen and a signal from a position detector on the upper part of the fixed base. Or grinding equipment. (3) A fixed-size machining feed function is added that can set the finished dimensions of the workpiece by detecting the contact position between the front end surface of the cutting or grinding tool and the front surface of the workpiece mounting board. cutting or grinding equipment. (4) The method according to claim 3, further comprising a function of calibrating the cumulative value of dimensional fluctuations of the workpiece and the processing mechanism by setting the finished dimensions of the workpiece in a sizing device connected to the automatic zero point correction circuit. Cutting or grinding equipment.