JPS6338999Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to an improvement of a grinding machine that grinds the flat surface of a workpiece using the entire surface of a grinding wheel.

(Conventional technology and its problems) Conventionally, this type of grinding machine includes a vertical grinding machine that grinds the grinding wheel or workpiece by moving it vertically, and a horizontal grinding machine that grinds it by moving it horizontally. There are different uses depending on the material and hardness of the workpiece. In particular, both of the above-mentioned grinding machines are selectively used for grinding hard and brittle materials such as ferrite and semi-milk materials, but conventional grinding machines use the top surface of the table to which the workpiece attachment plate is fixed as the reference surface. However, there were disadvantages in that the thickness error of the attachment plate and the flatness of the surface of the table itself had a large effect on the processing dimensions of the workpiece.

Moreover, installing two grinders, the vertical grinder and the horizontal grinder, doubles the equipment cost and maintenance cost, which is not economical.

(Means for solving the problem) This invention was made in view of the above problem, and it is possible to perform vertical grinding and horizontal grinding with one grinding machine, and the workpiece is simply attached to the top surface of the plate. The main purpose of this invention is to provide an improved grinding machine that is capable of processing with extremely high precision compared to conventional equipment.

Hereinafter, this invention will be explained in detail based on drawings showing an example of its implementation.

In Figures 1 to 3, 1 is the body of the grinding machine, 2 is the electrical equipment box, and the machine body 1 is provided with a table 3 that is slidable in the horizontal axis direction, and a receiving frame 4 is erected on the table 3. A rotary push-up shaft 5 along the vertical axis is supported on the lower frame portion of the holder so as to be slidable in the axial direction, and the workpiece attachment plate is suctioned and held on the end surface of the upper shaft by vacuum suction force. do. A rotation reference shaft 7 is supported in the upper part of the receiving frame 4 at a location whose axis coincides with the push-up shaft 5, and a suction flange 6 at the lower end of this reference shaft is used to attach a workpiece to a reference surface 7a on the lower surface of the suction flange 6. Apply vacuum suction with the top surface of the plate perpendicular to the reference axis.

In the machine body 1, a rotary grindstone shaft 8 along a vertical axis is located near a reference shaft 7 that vacuum-suctions the push-up shaft 5 and the attachment plate from above perpendicular to the reference shaft via a suction flange. A grindstone 9 is attached to the lower end of the grindstone shaft 8.

A is a motor for rotating the grindstone spindle 8, B is a motor for synchronously rotating the push-up shaft 5 and the reference shaft 7, C is a motor for lateral driving the table 3, D is a motor for rotating the grindstone spindle 8,
indicates a motor for fast forwarding the grinding wheel spindle (not shown)
and E is a motor (not shown) for vertically grinding the grindstone spindle. The sliding of the push-up shaft 5 is operated by a fluid cylinder (not shown).

Next, the operation and operation when performing vertical grinding on a workpiece using the grinding machine configured as described above will be explained with reference to FIGS. 4A to 4E.

(1) Set the affixing plate 10 on which the workpiece W is affixed to the end face of the upper shaft of the push-up shaft 5 (Fig. 4A).

(2) The push-up shaft 5 pushes up the attachment plate 10 while vacuum suctioning it, presses it against the reference surface 7a of the suction flange 6, and then performs vacuum suction at right angles from the reference surface.
The vacuum suction of the push-up shaft is released and only pressing is performed, and the attachment plate 10 on which the workpiece is pasted is held between the suction flange 6 and the push-up shaft 5 at right angles to the reference axis (Fig. 4B). , Figure 4C).

(3) While holding the pasting plate 10, the push-up shaft 5 and the reference shaft 7 are rotated synchronously by the motor B, the grindstone shaft 8 is rotated by the motor A, and the table 3 is fast-forwarded by the drive motor C. Then, the grindstone shaft 8 is rapidly moved by the motor D and lowered to the set position (FIG. 4C).

(4) The table 3, which has been moved to the first set position by rapid traverse, is switched to slow traverse by motor C and is moved to the second set position (Fig. 4D).

(5) After moving the table 3 to the second setting position and stopping it, the grinding wheel spindle 8 is sent by the grinding feed motor E to the cut setting position of the sizing device using the top surface of the pasting plate as a reference ( Figure 4E).

After cutting to the set cutting position, perform spark out.

(6) After spark-out, return the grinding wheel shaft 8 and table 3 to their original positions by rapid forwarding.

(7) The grindstone shaft 8 returns to its original position by rapid traverse, and the table 3 switches to low-speed traverse midway through and returns to its original position.

(8) Stop the vacuum suction from the suction flange 6 and lower the push-up shaft 5. At this time, the compressed air from the suction flange 6 is sucked out.

Next, operations for performing horizontal grinding and its operation will be explained with reference to FIGS. 5A to 5E.

(1) Set the affixing plate 10 on which the workpiece W is affixed to the end surface of the upper shaft of the push-up shaft 5 (Fig. 5A).

(2) The push-up shaft 5 pushes up the attachment plate 10 while vacuum suctioning it, presses it against the reference surface 7a of the suction flange 6, and then performs vacuum suction at right angles from the reference surface.
The vacuum suction of the push-up shaft is released and only pressing is performed, and the attachment plate 10 with the workpiece pasted is held between the suction flange 6 and the push-up shaft 5 at right angles to the reference axis (Fig. 5B). , Figure 5C).

(3) While holding the pasting plate 10, the push-up shaft 5 and the reference shaft 7 are rotated synchronously by the motor B, the grindstone shaft 8 is rotated by the motor A, and the table 3 is fast-forwarded by the drive motor C. The grindstone shaft 8 is also rapidly moved by the motor D and lowered to the set position (FIGS. 5C and 5D).

(4) After the rapid feed of the grindstone shaft 8 has stopped, it is switched to slow feed by the motor E to the cut setting position set based on the top surface of the affixing plate, and is lowered, and then stopped.

(5) Move the table 3 at a slow speed to the second setting position using the motor C and perform the cutting.

(6) Stop table 3 at the second setting position and perform spark out.

(7) After the spark-out is completed, return the grinding wheel shaft 8 to its original position, stop rotation, and return the table in fast forward motion.
Switch to low speed and stop at the original position.

(8) Stop the vacuum suction from the suction flange 6 and lower the push-up shaft 5. At this time, compressed air is blown out from the suction flange 6.

(Effects of the invention) As described above, according to this invention, a table is provided on the machine body so as to be slidable in the horizontal axis direction, and a workpiece attachment plate is supported on a receiving frame erected on the table. a push-up shaft that can be pushed up by the push-up shaft, and a reference shaft that can hold the workpiece sticking plate pushed up by the push-up shaft at right angles to the reference axis by vacuum suction from above the workpiece sticking plate together with the push-up shaft. are opposed to the same vertical axis, and a rotary grindstone shaft is supported on the machine body at a location spaced apart from the push-up shaft and the reference shaft so as to be able to freely slide along the vertical axis. The attached grindstone uses the suction flange reference surface of the reference shaft as the machining reference surface to finish the dimensions of the workpiece with high precision, and the push-up shaft and the reference shaft are operated by motors for synchronous rotation of both axes. A horizontal feed motor is operatively connected to the table, and a vertical feed motor is operatively connected to the grinding wheel shaft, so that vertical grinding and horizontal grinding can be performed with one grinding machine. The practical value of the board can be greatly increased.

In particular, according to the present invention, since the reference surface 7a for vacuum suctioning the sticking plate perpendicular to the reference axis is in the direction of the grinding wheel (including cases where the grindstone is oriented horizontally or upward), the grinding machine using the sticking plate It offers the following advantages:

1. In order to finish the dimensions of a workpiece with high accuracy using conventional equipment, it is necessary to keep the parallelism and thickness accuracy of the affixing plate to the same level as the accuracy of the table surface, but in this invention, the accuracy of the affixing plate is Since the top surface on the vacuum side is used as the reference for grinding, it is only necessary to ensure the accuracy of the flatness of the top surface of the attachment plate.

2. With conventional equipment, in order to reduce variations in workpiece thickness and parallelism, it is necessary to make the thickness and parallelism of the attachment plates uniform, and it is difficult to make them uniform for a large number of attachment plates. However, this invention solves this problem.

3 Compared to conventional equipment, the present invention vacuum-suctions the pasting plate from above at right angles to the reference axis using the suction flange, which reduces the influence of thermal expansion such as the pasting plate and chuck table, and improves the finished dimensional accuracy of the workpiece. improves.

[Brief explanation of drawings]

Fig. 1 is a front view of a grinding machine showing an embodiment of this invention, Fig. 2 is a plan view, Fig. 3 is a side view, and Fig. 4A
4E to 4E are explanatory views showing the process order of vertical grinding, and FIGS. 5A to 5E are explanatory views showing the process order of horizontal grinding. 1... Airframe, 2... Electric equipment box, 3... Table, 4... Receiving frame, 5... Push-up shaft, 6... Adsorption flange, 7... Reference axis, 7a... Reference surface, 8...
Grinding wheel shaft, 9... Grinding wheel, 10... Pasting plate, A... Motor for driving grindstone shaft rotation, B... Motor for driving push-up shaft and reference axis synchronous rotation, C... Motor for table lateral drive, D... ...Grinding wheel shaft vertical rapid feed motor, E
... Grinding wheel shaft vertical grinding feed motor, W ... Workpiece.

Claims (1)

[Scope of utility model registration request] A table is provided on the machine body so as to be able to slide freely in the horizontal direction, and a support frame erected above the table has a push-up shaft that can support and push up the workpiece attachment plate. A push-up shaft and a reference shaft that can hold the workpiece attached plate at right angles by vacuum suction from above are opposed to each other on the same vertical axis, and the push-up shaft and the reference axis A rotary grindstone shaft is supported slidably along the vertical axis at a location separated by a required distance from A grinding machine that is characterized by its ability to finish the dimensions of objects with high precision.