JPS6327945Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for automatically cutting flat and curved surfaces on the inner surface of a workpiece, such as a differential transmission case of an automobile part.

Devices for cutting the inner surfaces of a large number of workpieces are increasingly automated, especially in devices incorporated into transfer machines, and the inner surfaces are cut automatically at each stage. however,
If the type of workpiece is different, the worker manually exchanges the cutter before sending it to the automatic processing line. This requires labor and time to manually replace the cutter, significantly reducing the effectiveness of automating other processes, and significantly lowering the operating rate of the production equipment.

The purpose of this invention is to automatically carry out the process in which workers had to manually change the cutters in the past, thereby reducing the time required to change cutters depending on the type of workpiece, increasing production volume, and increasing the operating rate of the equipment. can improve,
An object of the present invention is to provide an inner surface cutting device that automatically performs setup changes in response to changes in workpieces.

The internal cutting device according to the present invention fully automatically inserts the cutter support that rotatably holds the cutter into the workpiece, inserts the drive center and center from both sides, clamps the cutter, and attaches the drive center. An internal cutting device that processes the inner surface of a workpiece by rotating the cutter and moving the cutter and cutter support in the direction of the rotational axis of the cutter by rotating and feeding a spindle. Each cutter support is attached radially to the periphery of the indexing board via sliding means in the direction of the rotation axis of the cutter, and the indexing board is rotatably attached to a table that is raised and lowered by a hydraulic cylinder. The indexing board rotates in response to a signal from a device that detects the type of workpiece, and after positioning the cutter support that holds the desired cutter on the lower side, the table is lowered by a hydraulic cylinder and the cutter is removed. The apparatus is characterized in that the support is inserted into the workpiece.

Hereinafter, the apparatus of the present invention will be described in detail based on drawings of embodiments. FIG. 1 is a front view of an embodiment of the apparatus of the present invention, and FIG. 2 is a side view of the cutter support section.

The cutter support 3 rotatably holds the cutter 1. The cutter support 3 is radially attached to the periphery of the indexing plate 14 via sliding means.
In other words, the cutter support 3 is connected to the slide table 4.
The slide table 4 is attached to the indexing board 1.
It is slidably supported by a guide bar 5 fixed to 4. In this way, the cutter support 3 is slidable in the direction of the rotation axis of the cutter 1.

A plurality of cutter supports 3 are radially attached to the periphery of the indexing board 14 at the same distance from the center thereof. In the illustrated embodiment, four cutter supports 3 (two cutter supports are not visible in the front view of FIG. 1) are installed, each holding a different cutter. The indexing board 14 is rotatably attached to the table 8 at its center. The table 8 is slidable between the guide bar 6 and the guide bracket 7 fixed to the column 10, and
It is raised and lowered by a hydraulic cylinder 9 fixed at zero. 11 is a column bracket.

In this device, an indexing plate 14 rotates in response to a signal from a detection device (not shown) that detects the type of workpiece to be processed, automatically indexes it, and lowers the cutter support 3 that holds the required cutter 1. position it on the side. Further, under automatic control, the hydraulic cylinder 9 is actuated, the table 8 is lowered, and the cutter support 3 is inserted into the workpiece.

When the cutter support 3 descends and the rotational axis of the cutter 1 reaches the center of the processing surface of the workpiece and stops, the feed units (not shown) placed on both sides of the center line of the processing surface are driven. center 1
The spindle 2 with the drive center 12 and center 13 attached thereto is inserted, and the drive center 12 and center 13 fit into the cutter 1, and the cutter 1 is held between them.

The drive center 12 is rotated to move the feed unit on one side forward, and the feed unit on the other side applies back pressure to the retreat side, causing the cutter 1 and drive center 1 to move forward.
2. With no gap between the centers 13, cutter 1
rotates and moves. At this time, cutter support 3
must also move at the same time.

The cutter support 3 is integrated with a slide table 4, and since the slide table 4 is slidable along the guide bar 5 in the direction of the rotation axis of the cutter 1, the cutter support 3 moves smoothly.

In this way, the cutter 1 cuts the inner surface of the workpiece. When cutting the inner surface on the opposite side, the forward and backward movement of the feed unit is reversed. When the machining is finished, the feed units on both sides move back and the cutter 1 is released. The slide table 4 integrated with the cutter support 3 is pushed by a spring 15 and returned to the insertion position. Next, the hydraulic cylinder 9
is operated, and the table 8 slides between the guide bracket 7 and the guide bar 6 and rises. Accordingly, the cutter support 3 also rises and returns to its normal position before insertion.

Thereafter, similar operations are repeated based on the signal from the detection device for the type of workpiece.

Since the device of the present invention is constructed and operates as described above, it can achieve many effects.

That is, even if a plurality of types of workpieces are loaded into one transfer machine, the inner surface can be processed automatically without requiring any labor from the operator. In addition, since it is an automatic setup change device, even if multiple types of workpieces are randomly input, the cycle time does not change, improving functionality and performance, and increasing investment efficiency. Furthermore, the operating rate can be increased due to automatic setup changes within the cycle time.

[Brief explanation of drawings]

Figure 1 is a front view of an embodiment of the device of the present invention;
The figure is a side view of the cutter support section. 1... cutter, 2... spindle, 3... cutter support, 4... slide table, 5, 6
...Guide bar, 7...Guide bracket, 8...
...Table, 9 ... Hydraulic cylinder, 10 ... Column, 12, 13 ... Center, 14 ... Indexing board, 1
5...Spring.

Claims (1)

[Scope of utility model registration request] Internal processing with a table that can be raised and lowered, a cutter support that is slidably supported by the table and rotatably holds a cutter, and spindles that are placed on both sides of the cutter inserted into the workpiece. An inner surface cutting device characterized in that an indexing board rotatably supported by the table is provided, and a plurality of cutter supports each holding a different cutter are attached radially around the periphery of the indexing board. .