JPH0329094Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a grooving, cylindrical, and plane two-axis automatic grinding machine that can perform cylindrical grinding, surface grinding, and grooving grinding.

When performing cylindrical grinding of conventionally hard and brittle workpieces,
One diamond cup wheel grinding wheel
As shown in Fig. 6, the center axis a of the workpiece A and the grinding wheel are aligned so that the center C of the wall thickness t on the end face of the grinding wheel is located in the cutting line direction with respect to the cutting surface on the outer periphery of the workpiece A. The axis b of the wheel is the center C of the wall thickness t of the grinding wheel.
The workpiece A is rotated at high speed from a direction perpendicular to the workpiece A, and the workpiece A, which is clamped between the main spindle and the tailstock rod, is rotated at a low speed, The amount of movement of the workpiece A is determined by the wall thickness t of the grinding wheel per revolution.
The grinding wheel is moved at a feed pitch of 1 to 2 times that of the grinding wheel, and cutting is performed using the end face, inner surface, and outer circumferential surface of the grinding wheel. At this time, when the wall thickness t of the grinding wheel is thinner than the width of one pitch that the workpiece A moves in one rotation, cutting is performed on the outer circumferential surface and the end face, and when it is wider than the wall thickness t, the wide part is left as cutting residue. This debris is pressed and scraped off by the inner surface of the grinding wheel, and intermediate finishing is performed after rough cutting in the next pitch and the next pitch, and final polishing is performed in the next pitch. A grinding and cutting method in which rough cutting to finishing is carried out in a single continuous process is known by the present inventor as Japanese Patent Publication No. 16400/1983. However, even if cylindrical grinding, which can be performed from rough cutting to finishing machining with chipping in one step like the method described above, requires surface grinding after grinding or grooves must be made in the workpiece. A situation arises. In such cases, it cannot be done with the same grinder, so a different grinder is used. For this purpose, surface grinding involves the trouble of marking, and especially when a plurality of surfaces are ground, indexing and the like are required, which is a troublesome drawback.

Furthermore, a milling machine using two shafts is known as shown in Japanese Utility Model Application Publication No. 52-67694. The two shafts of this milling machine include a first main shaft for attaching a milling cutter arranged vertically to the main body and a second main shaft for attaching a milling cutter arranged horizontally to the main body. The second milling cutter is used to cut horizontally and to cut grooves. That is, in order to perform cutting when it is desired to make a groove in a horizontally cut surface, the two axes are provided in the vertical direction and the horizontal direction, as described above. Therefore, when cylindrical grinding of such a product is performed, a separate grinding machine or the like must be used, which is inconvenient in terms of centering, time, and accuracy.

In addition, in the former cylindrical grinding described above, a cup-wheel grinding wheel is used, and the end face of the cup-wheel grinding wheel performs rough grinding to finishing for efficiency reasons, but since the cup-wheel grinding wheel is also used for surface grinding, cylindrical grinding is performed. When the need for surface grinding arises after grinding, customers have desired that surface grinding can be carried out using the same grinder without using a separate grinder, thereby streamlining the work.

This invention was devised in order to deal with these problems in view of the above-mentioned circumstances, and includes a table that moves from side to side on the top surface of the table. The provided tailstock rods are provided facing each other on the same axis, and furthermore, a guide board is provided on the base in a direction perpendicular to the table, and the guide board is linked to a digital display provided on the control panel. A grindstone head that can automatically make cuts using a feed motor is attached so that it can move forward and backward toward the table, and a linear scale that can be displayed on the table is attached to the grindstone head. An elevating plate is provided with two shafts supported at a distance from each other, and one of the two upper and lower shafts has a lower grinding wheel shaft at the tip thereof,
A cup wheel grinding wheel for cylindrical and surface grinding and a grinding wheel for grooving are attached to the upper grinding wheel shaft, and each is connected to a respective motor, and the elevating plate is connected to a motor provided at the upper end of the grinding wheel head. Further, the main spindle is provided with an index plate with an index scale and connected to the motor via a clutch mechanism, and the headstock is equipped with an index plate. It is equipped with a fixing mechanism that fixes and releases the index plate at the extraction position, and if necessary, rotates the workpiece supported by the main spindle and tailstock, performs cylindrical grinding with a cup wheel grinding wheel, and fixes the main spindle. This product provides a 2-axis automatic grinding machine for grooving, cylindrical, and flat surfaces that performs surface grinding using a cup wheel grinding wheel or grooving using a grooving wheel. , using a linear scale to digitally reset the finished dimension value of the workpiece and the initial dimension of the workpiece, and perform automatic cutting and grinding until the digitally displayed finished dimension is reached.Grooving, cylinder, flat surface 2 With an automatic shaft grinder,
That is, the purpose of the present invention is to streamline work and achieve accurate finishing.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a grooving, cylindrical, and flat two-axis automatic grinding machine according to the present invention will be described in detail below with reference to the accompanying drawings.

1 is a base, and on this base 1, a table 2 that moves from side to side like a general grinding machine is installed.
On the top surface, a headstock 3 and a tailstock 4 are arranged facing each other in a straight line, the headstock 3 is provided with a main shaft 5, the tailstock 4 is provided with a tailstock rod 7 formed by a hydraulic cylinder 6, The main shaft 5 is also connected to a main shaft drive motor 9 via a clutch mechanism 8.

Further, an indexing plate 10 is provided on the main spindle 5 via a key, so that an indexing scale 11 provided on the indexing plate 10 can be indexed using a display line 12 provided on the headstock 3. The headstock 3 has a pair of clamping pieces 13, 1.
3' is pivotally supported and indexed using the indexing plate 10. After that, the indexing plate 10 is fixed by being held between the clamping pieces 13 and 13' and tightened with appropriate means such as the tightening bolt 14. The rotation of the main shaft 5 is stopped through the .

The workpiece W held between the main spindle 5 and the tailstock rod 7 is fitted with holding hardware a and b at both ends, and the indexing plate 10 is released from the clamping mechanism 8, which is interposed between the main spindle 5 and the motor 9. When you connect the motor 9
The rotation is transmitted to the workpiece W via the main shaft 5.

A guide plate 15 is provided on the base 1 in a direction perpendicular to the axes of the main spindle 5 and the tailstock 7, and the guide plate 15 has a grindstone head 16 on its upper surface that moves back and forth toward the axes. It is slid into place.

A linear scale 17 is attached to the whetstone head 16, and the whetstone head 16 is moved forward and backward toward the table 2 by a feed motor 18.

The linear scale 17 is displayed in conjunction with a digital display section provided on the control panel 19, so that the moving position of the grindstone head 16 can be seen.

The grinding wheel head 16 is provided with a limit switch 20 for detecting the origin at the origin position so that the grinding wheel head 16 is stopped when it is moved backward.

On the grindstone head 16, there is a bearing 23' that supports two grindstone shafts 21 and 22 parallel to each other with an interval above and below.
The grinding wheel head 16 is slidably fitted into the lifting plate 24 having a vertically movable structure, and the grinding wheel head 16 is attached to a female screw body 25 attached to the lifting plate 24.
A screw rod 26' from a motor 26 having a speed reduction mechanism attached to the upper end is screwed together, and the rotation of the screw rod 26' moves the elevator plate 24 up and down to change the positions of the grindstone shafts 21 and 22. be.

The grinding wheel shafts 21 and 22 are respectively made to protrude in the direction (front) of the table 2, and have a diamond cup wheel grinding wheel 27 and a grooving grinding wheel 28 at their tips.
Further, the other ends of the grindstone shafts 21 and 22 are connected to motors 29 and 30 via belts or the like, so that they are rotated at high speed by the rotation of the motors 29 and 30.

The upper whetstone shaft 22 supported on the bearing 23 of the elevating plate 24 can be adjusted with a fine adjustment screw 31 in the front and back direction provided on the elevating plate 24. Furthermore, the elevating plate 24 has a screw between it and the grinding wheel head 16. An origin detection switch 32 is provided to stop the machine when it reaches the origin position.

When performing cylindrical grinding, the cup-wheel grinding wheel 27 attached to the tip of the lower grinding wheel shaft 21 supported on the lifting plate 24 is positioned so as to be offset from the center line of the workpiece by the effective radius of the grinding wheel, and also During grinding, the cup wheel grindstone 27 is positioned so that its axis is aligned with the center line of the workpiece.

Further, the upper grinding wheel 28 is adjusted by the fine adjustment screw 31 so that it is positioned opposite to the upper part of the center line of the workpiece.

The grinding parts of the grinding wheels 27 and 28 are provided with nozzles 33 and 34 for supplying a cooling liquid to cool them during grinding. 35 and 36 are limit switches mounted on the base 1 and operating pieces 3 placed on the table 2.
7 and 38 are used to switch the left and right movement of the table.

39 is a tailstock hydraulic pump motor, and 40 is a foot switch.

The present invention has the above-mentioned structure, and before starting grinding, in the case of cylindrical grinding, the grinding wheel surface of the cup wheel grinding wheel 27 attached to the tip of the grinding wheel shaft 21 supported by the bearing 23 of the elevator plate 24 is connected to the main spindle 5. The grinding wheel is offset from the center line of the workpiece W held by the tailstock 7 by the effective radius of the grinding wheel so that it contacts the cutting surface at right angles. That is, the center line of the workpiece W and the center axis of the grinding wheel are vertically different from each other and are located at right angles, and the grinding wheel is adjusted to this state and is advanced until it hits the tailstock rod 7. After confirming that, the previously known diameter of the tailstock rod 7 is reset to digital and the diameter display is digitally displayed.
Then, the finished dimensions are digitally reset, and grinding is performed by sequentially automatically making cuts until the finished dimensions are digitally displayed. When surface grinding is performed next, the axis of the grinding wheel and the center line of the workpiece W are aligned so that they face each other, and furthermore, in order to stop the rotation of the main shaft 5, the drive communication is cut off by the clutch mechanism 8. The index plate 10 is clamped and tightened between the clamping pieces 13 and 13' to fix the main shaft, and the finished dimensions of the workpiece W are reset and displayed digitally in the same manner as described above, and the finished dimensions are sequentially adjusted. If surface grinding is performed until the depth of cut is reached, and then a plurality of surface grinds are performed on the workpiece W after surface grinding, the index scale 11 of the index plate 10 provided on the spindle 5 and the display provided on the headstock 3. After indexing by the line 12, it is clamped and fixed by the clamping pieces 13, 13' in the same manner as described above.

Also, when grooving the workpiece W,
After the grooving grinding wheel 28 attached to the upper grinding wheel shaft 22 is positioned at the top facing the center line of the workpiece W, the outer diameter of the workpiece and the finishing depth of the groove are digitally reset. In the same manner as described above, the clamping and tightening rotation of the workpiece W is stopped and fixed by the clamping pieces 13 and 13', and the workpiece W is rotated by the drive of the motor 30, and the table 2 is moved to sequentially form grooves of the finishing depth in the workpiece W. It is used for processing.

As mentioned above, the present invention is a grinding machine equipped with two shafts, and even after cylindrical grinding is completed, the drive of the main shaft 5 is disengaged via the clutch mechanism 8, and the drive of the main shaft 5 is further fixed using a clamp mechanism. Therefore, by changing the position of the cup wheel grinding wheel during cylindrical grinding, surface grinding can be performed using the same grinding wheel, or grooving can be performed using the upper grooving wheel, with the workpiece in its original state. The work can be streamlined without the hassle of replacing with another grinder, unlike the conventional grinding machine for flattening or grooving. Further, since the next processing is performed in the processed state, there are no twists and turns, and there are advantages such as accuracy and precision.

[Brief explanation of the drawing]

The drawings show an embodiment of the grooving, cylindrical, and flat 2-axis automatic grinding machine according to the present invention, in which Fig. 1 is a front view, Fig. 2 is a side view, and Fig. 3 is a cross-sectional view of Fig. 1. FIG. 4 is an enlarged front view of a partially cutaway portion of the indexing portion, and FIGS. 5 and 6 show the relationship between the workpiece and the cup-wheel grinding wheel. 1... Base, 2... Table, 3... Headstock,
4...Tailstock, 5...Main shaft, 6...Hydraulic cylinder, 7...Tailstock, 8...Clutch mechanism, 9
... Main shaft motor, 10 ... Index plate, 11 ... Scale, 12 ... Display line, 13, 13' ... Clamping piece,
14... Tightening bolt, 15... Guide plate, 16...
... Grinding wheel head, 17 ... Linear scale, 18 ... Feed motor, 19 ... Control panel, 20 ... Limit switch, 21, 22 ... Grinding wheel shaft, 23 ... Bearing,
24... Lifting plate, 25... Female threaded body, 26... Motor, 26... Screw rod, 27... Cup wheel grinding wheel, 28... Grooving grinding wheel, 29, 30... Motor, 31... Fine adjustment Screw, 32... Origin detection switch, 33, 34... Nozzle, 35, 36...
...Switch, 37, 38... Actuation piece, 39... Hydraulic pump motor, 40... Foot switch, W...
...Work material.

Claims (1)

[Scope of utility model registration request] A table is provided that moves the top surface of the base from side to side, and on this table, the main spindle provided on the headstock and the tailstock rod provided on the tailstock are placed facing each other on the same axis, and further on the base is the A guide board is installed perpendicular to the table, and a linear scale is attached to the guide board to display the information in conjunction with the digital display on the control panel. Slides in so that it can move forward and backward,
Furthermore, the front surface of the grindstone head on the table side is equipped with an elevating plate having two shafts projecting toward the front and supported horizontally at intervals above and below, one of the two upper and lower shafts having a tip of the lower grindstone shaft. A cup wheel grinding wheel for cylindrical and surface grinding and a grinding wheel for grooving are mounted on the other upper grinding wheel shaft, and each is connected to a respective motor, and the elevating plate is installed at the upper end of the grinding wheel table. The screw rod from the motor is screwed together to enable it to be raised and lowered, and the main shaft is provided with an index plate with an index scale, and is connected to the motor via a clutch mechanism. , is equipped with a fixing mechanism that fixes and releases the index plate at the index position, and as necessary rotates the workpiece supported by the main spindle and tailstock, performs cylindrical grinding with a cup wheel grinding wheel, and rotates the main spindle. A two-axis automatic grinding machine for grooving, cylindrical, and flat surfaces, which is fixed and capable of surface grinding with a cup wheel grinding wheel, or grooving with a grooving wheel.